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1
Zhang, Sheng Wen, and Xuan Peng Wang. "Configuration of Multi-Tenant Applications." Advanced Materials Research 219-220 (March 2011): 1182–85. http://dx.doi.org/10.4028/www.scientific.net/amr.219-220.1182.
Повний текст джерелаАнотація:
SaaS (Software as a Service) application mode came into being along with the expansion and convenient of the network platform, and its core lies in Multi-Tenant (multi-tenant) application. Multi-Tenant Application under the SaaS model makes software applications efficient and convenient, more importantly, tenants can greatly reduce their software development costs, hardware acquisition costs, training costs, and upgrade and maintenance costs by using the application system, which virtually eased business cost pressures and makes more focus on business development. This paper elaborates the personalized needs of tenants for Multi-Tenant Applications mainly from the three aspects: data, function, and interface. With the configuration of data, function and interface, Multi-tenant applications will become better.
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Levieux, Sébastien, Frank Singhoff, Stéphane Rubini, et al. "An Iterative Benchmark Configuration Method forQuantifying Multi-core Interference." ACM SIGAda Ada Letters 44, no. 1 (2024): 78–84. https://doi.org/10.1145/3706601.3706615.
Повний текст джерелаАнотація:
Interference within a multi-core architecture may have several origins. Understanding where interference comes from is mandatory for verification and certification purposes. Unfortunately, the complexity of current architectures makes it difficult to quantify such interference. In this article, a new approach is introduced that enables benchmark configurations to isolate and quantify interference. An experiment with DMA interference is presented and shows a WCET overhead of up to 0.26% at 25 Mbit/s. This experiment was also able to discover and identify interference related to DMA, such as interruptive flow overhead, around 3% for 25 Mbit/s, or packet transmission memory access overhead, around 9% for 25 Mbit/s.
3
Fan, Kaijie, Biagio Cosenza, and Ben Juurlink. "Accurate Energy and Performance Prediction for Frequency-Scaled GPU Kernels." Computation 8, no. 2 (2020): 37. http://dx.doi.org/10.3390/computation8020037.
Повний текст джерелаАнотація:
Energy optimization is an increasingly important aspect of today’s high-performance computing applications. In particular, dynamic voltage and frequency scaling (DVFS) has become a widely adopted solution to balance performance and energy consumption, and hardware vendors provide management libraries that allow the programmer to change both memory and core frequencies manually to minimize energy consumption while maximizing performance. This article focuses on modeling the energy consumption and speedup of GPU applications while using different frequency configurations. The task is not straightforward, because of the large set of possible and uniformly distributed configurations and because of the multi-objective nature of the problem, which minimizes energy consumption and maximizes performance. This article proposes a machine learning-based method to predict the best core and memory frequency configurations on GPUs for an input OpenCL kernel. The method is based on two models for speedup and normalized energy predictions over the default frequency configuration. Those are later combined into a multi-objective approach that predicts a Pareto-set of frequency configurations. Results show that our approach is very accurate at predicting extema and the Pareto set, and finds frequency configurations that dominate the default configuration in either energy or performance.
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Israr, Haris Ahmad, Teh Soo Chwen, Ainullotfi Abd Latif, et al. "Preliminary Structural Design of Coreless Spoiler by Topological Optimization." Processes 10, no. 10 (2022): 2076. http://dx.doi.org/10.3390/pr10102076.
Повний текст джерелаАнотація:
Most spoilers are made from a sandwich structure with a honeycomb component as its core. However, the honeycomb core is sensitive to water ingress, causing damage to the control surface due to its weak moisture-resistance behavior. This study aimed to conduct the design and analysis of an improved composite structure for a coreless spoiler. A spoiler design of an aircraft, the A320, was used for the case study. The weaknesses of a coreless spoiler were identified through finite element analysis via Abaqus software. Multi-spar and multi-rib designs were studied and compared for topological optimization. The variables used for evaluation were the Tsai–Hill failure index and the critical buckling load. The design with the most potential was considered for parametric optimization to obtain the most satisfactory configuration. The results showed that the upper skin of the spoiler without a honeycomb core failed the Tsai–Hill criteria. Furthermore, the results show that the multi-spar configuration outperformed the multi-rib configuration. The final multi-spar configuration achieved a mass reduction of 24% from the original spoiler and an additional 6% mass reduction by re-designing the internal structures without violating the design criteria. In conclusion, the weaknesses of the spoiler without a honeycomb core have been identified, and an improved design for a coreless spoiler has been proposed.
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Sun, Jiang, Ju Long Lan, and Yu Feng Li. "Reseach and Implementation of Packet Capture Based on Multi-Core Binding Technology in Linux Environment." Applied Mechanics and Materials 48-49 (February 2011): 902–5. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.902.
Повний текст джерелаАнотація:
According to zero-copy idea and the application of multi-core binding to realize a high-performance packet capture platform based on multi-core binding(MCPCP).By modifying the memory management mode about sk_buff in kernel,realize the user space program to directly access the data packet, which is a kind of universal significance of the zero-copy scheme. And then through the multi-core binding technique, for each CPU core scheduling and control, with multi-threaded user programs can minimize the cache jitter to improve the efficiency of packet capture. Experiments show that in the case of low-end configuration, the throughputs of MCPCP for 64Byte and 1500Byte messages are 620 ,000pps (about 320Mbps) and 78,000pps (about 941Mbps) respectively. In the high-end configuration, can reach 1.46 million pps (748Mbps) and 81,000 pps (979Mbps).MCPCP surpasses the traditional ones' in performance.
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Lorenti, Gianmarco, Carlo Stefano Ragusa, Maurizio Repetto, and Luigi Solimene. "Data-Driven Constraint Handling in Multi-Objective Inductor Design." Electronics 12, no. 4 (2023): 781. http://dx.doi.org/10.3390/electronics12040781.
Повний текст джерелаАнотація:
This paper analyses the multi-objective design of an inductor for a DC-DC buck converter. The core volume and total losses are the two competing objectives, which should be minimised while satisfying the design constraints on the required differential inductance profile and the maximum overheating. The multi-objective optimisation problem is solved by means of a population-based metaheuristic algorithm based on Artificial Immune Systems (AIS). Despite its effectiveness in finding the Pareto front, the algorithm requires the evaluation of many candidate solutions before converging. In the case of the inductor design problem, the evaluation of a configuration is time-consuming. In fact, a non-linear iterative technique (fixed point) is needed to obtain the differential inductance profile of the configuration, as it may operate in conditions of partial saturation. However, many configurations evaluated during an optimisation do not comply with the design constraint, resulting in expensive and unnecessary calculations. Therefore, this paper proposes the adoption of a data-driven surrogate model in a pre-selection phase of the optimisation. The adopted model should classify newly generated configurations as compliant or not with the design constraint. Configurations classified as unfeasible are disregarded, thus avoiding the computational burden of their complete evaluation. Interesting results have been obtained, both in terms of avoided configuration evaluations and the quality of the Pareto front found by the optimisation procedure.
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Wang, Dong. "The Study of Multi-Tenant's Configurability." Modern Electronic Technology 1, no. 1 (2017): 24. http://dx.doi.org/10.26549/met.v1i1.326.
Повний текст джерелаАнотація:
SaaS (Software as a Service)the application mode occurs exactly along with the broadening and convenience of network platform, its core is the application of Multi-Tenant. The Multi-Tenant under SaaS not only makes Application Software more efficient and convenient, but also reduce the cost of software development, hardware purchase, training and upgrade maintenance, which can relieve the financial pressure of enterprises invisibly, so that enterprises can focus on the business development. Aiming at the personalized demand of Multi-Tenant's tenement, this thesis studies about personalized configuration of data, function, and operation interface, moreover, it shows the method of personalized configuration. It also indicates how to make the Multi-Tenant come true through personalized configuration, and realizes unified management of these applications.
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Liang, Yu, Yihui Yan, and Huiyuan Guan. "Middle school classroom furniture evaluation model based on combinatorial weighting of game theory." BioResources 20, no. 2 (2025): 3971–95. https://doi.org/10.15376/biores.20.2.3971-3995.
Повний текст джерелаАнотація:
Within the context of educational innovation, diversified teaching models impose higher requirements on classroom furniture adaptability. However, conflicting multi-stakeholder demands and configuration imbalances constrain the upgrading of educational spaces. To address this, this study focuses on the “demand-configuration” contradiction and constructs a composite evaluation model integrating the “game theory combined weighting method – fuzzy comprehensive evaluation method – quadrant diagram model”. Through improved Analytic Hierarchy Process (AHP) and entropy method game weighting, this approach can balance multi-party weight conflicts, quantify user satisfaction based on fuzzy evaluation, and identify “high demand-low adaptation” core indicators using the quadrant diagram. Taking classroom furniture in M Middle School as a practical case, results demonstrate that the quadrant diagram model accurately identified six core indicators based on comprehensive weights and satisfaction levels, aligning with current key optimization directions for classroom furniture. This validates the model’s feasibility and accuracy in resolving contradictions between multi-dimensional demands and actual configurations. The proposed evaluation system provides a framework of “demand deconstruction-efficiency evaluation-design guidance” for educational furniture design, which is applicable to quasi-public product design evaluation fields involving multiple stakeholders such as public medical products, thereby enhancing the matching efficiency between product resource allocation and diverse demands.
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Coutinho Demetrios, A. M., Daniele De Sensi, Arthur Francisco Lorenzon, et al. "Performance and Energy Trade-Offs for Parallel Applications on Heterogeneous Multi-Processing Systems." Energies 13, no. 9 (2020): 2409. http://dx.doi.org/10.3390/en13092409.
Повний текст джерелаАнотація:
This work proposes a methodology to find performance and energy trade-offs for parallel applications running on Heterogeneous Multi-Processing systems with a single instruction-set architecture. These offer flexibility in the form of different core types and voltage and frequency pairings, defining a vast design space to explore. Therefore, for a given application, choosing a configuration that optimizes the performance and energy consumption is not straightforward. Our method proposes novel analytical models for performance and power consumption whose parameters can be fitted using only a few strategically sampled offline measurements. These models are then used to estimate an application’s performance and energy consumption for the whole configuration space. In turn, these offline predictions define the choice of estimated Pareto-optimal configurations of the model, which are used to inform the selection of the configuration that the application should be executed on. The methodology was validated on an ODROID-XU3 board for eight programs from the PARSEC Benchmark, Phoronix Test Suite and Rodinia applications. The generated Pareto-optimal configuration space represented a 99% reduction of the universe of all available configurations. Energy savings of up to 59.77%, 61.38% and 17.7% were observed when compared to the performance, ondemand and powersave Linux governors, respectively, with higher or similar performance.
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Scharf, Oliver, and Gediminas Gaigalas. "Large scale multi-configuration Hartree-Fock calculation of the hyperfine structure of the ground state of vanadium." Open Physics 4, no. 1 (2006): 42–57. http://dx.doi.org/10.1007/s11534-005-0005-7.
Повний текст джерелаАнотація:
AbstractThe hyperfine structure of the ground state of vanadium, 51VI, is calculated in the nonrelativistic framework of the multi-configuration Hartree-Fock approximation. A configuration state function limiting algorithm is used to make the calculations feasible and to study the influence of core, valence and core-valence correlations in detail. The obtained configuration state function space captures the most important orbital correlations within 2%. Further correlations are included through configuration interaction calculation. The atomic state functions are used to evaluate the magnetic dipole hyperfine factor A and the electric quadrupole factor B. It turns out that the ab initio calculation can not capture the core polarization of the 2s shell. It introduces an error that is higher than the Hartree-Fock approximation. However, the detailed correlations being observed suggest the introduction of a wrong correlation orbital due to the algorithm being used. Neglecting this orbital leads to good agreement with 2% deviation from the experimental values for the A factors.
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Hernandez-Solis, Augusto, Yohannes Molla, Edoaurd Malambu, Alexey Stankovskiy, and Gert Van den Eynde. "VERIFICATION OF THE OpenMC HOMOGENIZED MYRRHA-1.6 CORE MODEL." EPJ Web of Conferences 247 (2021): 04002. http://dx.doi.org/10.1051/epjconf/202124704002.
Повний текст джерелаАнотація:
The OpenMC code is being employed both as a multi-group nodal macroscopic cross-section generator and a reference multi-group Monte Carlo (MGMC) solution. The aim is to do a neutronic benchmark verification study versus a deterministic model (based on the MYRRHA-1.6 core) performed by the PHISICS simulator. MYRRHA, a novel research accelerator driven system concept that is also foreseen to work as a critical configuration, offers a rich opportunity of testing state-of-the art methods for reactor physics analysis due to its strong heterogeneous configuration utilized for both thermal and fast spectra irradiation purposes. The original core configuration representing MYRRHA-1.6 and formed by 169 assemblies, was launched in OpenMC for producing a homogenous nodal model that, when executed in its multi-group Monte Carlo mode, it produced a keff that differs in almost 500 pcm from the original case. This means that in the future, such approximation should correct the nodal cross-sections to preserve the reaction rates in order to match those ones from the heterogeneous model. Nevertheless, such MGMC mode of operation offered by OpenMC could be exploited in order to verify deterministic core simulators. By inputting the same nodal multi-group cross-section model into the transport solver of the PHISICS toolkit, the neutronic benchmark showed a difference of 171 pcm in eigenvalue while comparing it to its OpenMC MGMC counterpart. Also, local multi-group and energy-integrated nodal profiles of the neutron flux showed a maximum relative difference between methodologies of 15% and 1%, respectively. This means that the MGMC capabilities offered by OpenMC can be employed to verify other deterministic methodologies.
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Hao, Qing Bin, Cheng Shan Li, Sheng Nan Zhang, et al. "Preparation of Multi-Core Bi-2212/Ag Wires." Materials Science Forum 745-746 (February 2013): 168–72. http://dx.doi.org/10.4028/www.scientific.net/msf.745-746.168.
Повний текст джерелаАнотація:
The core breaking mechanism of the traditional Bi-2212 wires with filament configuration of 85×7 during the drawing process was analyzed, and the solution of these problems was given. The results showed that the major reason of core breaking occurs was that the tensile stress was bigger on the center than the edge of Bi-2212 wires during the drawing, and the silver-superconductor ratio was smaller of the center than the edge of the traditional Bi-2212 wires. It was effective to avoid the core breaking of Bi-2212 wires using the Ag core strengthener, and the uniformity of distortion of Bi-2212 wires during the drawing was improved, and the critical current of Bi-2212 wires increased 40% than that of traditional wires. If the diameter of the filament of Bi-2212 wires decreased further, there would be lots of bridging between core and core, which provided routeway for current. So the critical current of Bi-2212 wires was improved further.
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Maity, Arka, Anuj Pathania, and Tulika Mitra. "PkMin: Peak Power Minimization for Multi-Threaded Many-Core Applications." Journal of Low Power Electronics and Applications 10, no. 4 (2020): 31. http://dx.doi.org/10.3390/jlpea10040031.
Повний текст джерелаАнотація:
Multiple multi-threaded tasks constitute a modern many-core application. An accompanying generic Directed Acyclic Graph (DAG) represents the execution precedence relationship between the tasks. The application comes with a hard deadline and high peak power consumption. Parallel execution of multiple tasks on multiple cores results in a quicker execution, but higher peak power. Peak power single-handedly determines the involved cooling costs in many-cores, while its violations could induce performance-crippling execution uncertainties. Less task parallelization, on the other hand, results in lower peak power, but a more prolonged deadline violating execution. The problem of peak power minimization in many-cores is to determine task-to-core mapping configuration in the spatio-temporal domain that minimizes the peak power consumption of an application, but ensures application still meets the deadline. All previous works on peak power minimization for many-core applications (with or without DAG) assume only single-threaded tasks. We are the first to propose a framework, called PkMin, which minimizes the peak power of many-core applications with DAG that have multi-threaded tasks. PkMin leverages the inherent convexity in the execution characteristics of multi-threaded tasks to find a configuration that satisfies the deadline, as well as minimizes peak power. Evaluation on hundreds of applications shows PkMin on average results in 49.2% lower peak power than a similar state-of-the-art framework.
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Farahani, Elham Darmanaki, and Jafar Habibi. "Configuration Management Model in Evolutionary Software Product Line." International Journal of Software Engineering and Knowledge Engineering 26, no. 03 (2016): 433–55. http://dx.doi.org/10.1142/s0218194016500182.
Повний текст джерелаАнотація:
In Software Product Line (SPL), Configuration Management (CM) is a multi-dimensional problem. On the one hand, the Core Assets that constitute a configuration need to be managed, and on the other hand, each product in the product line that is built using a configuration must be managed, and furthermore, the management of all these configurations must be coordinated under a single process. Therefore, CM for product lines is more complex than for single systems. The CM of any software system involves four closely related activities: Change Management (ChM), Version Management (VM), System Building (SB) and Release Management (RM) [I. Sommerville, Software Engineering, 9th edn. (Addison-Wesley, 2010)]. The aim of this paper is to provide ChM and VM models for evolutionary-based SPL system development and maintenance. The proposed models support any level of aggregation in SPLs and have been applied to Mobile SPL as a case study.
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Wahid, Achraf, Nadia Mouhib, Fatima Sabah, Hamid Chakir, and M. EL Ghorba. "Analytical estimation of the reliability of wire rope based on cumulative damage." MATEC Web of Conferences 286 (2019): 05001. http://dx.doi.org/10.1051/matecconf/201928605001.
Повний текст джерелаАнотація:
The main objective of this manuscript is the elaboration of a behavior model of the cable system, designed to the prediction of its damage from the behavior of its components (wires, strands). This multi-faceted scale is based primarily on the results experiments of the central core and helical strands components. At first, a resolution numerical probabilistic equation for the different configurations was established by the programming the system resolution scheme obtained, Subsequently, each damage curves obtained, corresponding to a particular configuration has been interpreted independently.
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Faidzi, Mohd Khairul, Shahrum Abdullah, Salvinder Singh Karam Singh, Mohamad Faizal Abdullah, and Abdul Hadi Azman. "Determination of Dimple Core Design Configurations for Sandwich Panel Enhancement Using Fuzzy-Hybrid Decision Making Analysis." Materials 16, no. 3 (2023): 935. http://dx.doi.org/10.3390/ma16030935.
Повний текст джерелаАнотація:
The purpose of this paper is to determine the best dimple core design for metal sandwich panels by investigating the various critical criteria and core design parameters using the fuzzy-hybrid multi-criteria decision-making tool. The structural integrity of a sandwich panel depends on the core design and significantly affects the bonding strength. The continuous design and testing of a sandwich panel is a very lengthy process that increases the design time. The simulation analysis output was segregated into nine critical failure criteria. All the critical criteria weightages were evaluated using the Fuzzy-Analytical Hierarchical Process, while the Fuzzy—Technique for Order Preference by Similarity to Ideal Solution was used to evaluate the Closeness Coefficient value to determine the best core design configuration. The results indicate that the core configuration with a diameter of 6.0 mm and a depth of 3.0 mm obtained the highest closeness coefficient values, 0.9937 and 0.9294, under cyclic loading conditions of 50% and 70%. It was shown that using average sizes in the dimple configuration tends to provide better delamination resistance and structural integrity. This study contributes to the selection of the optimum core design configuration based on the various design criteria and using non-complex and competent analysis.
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Li, Weiqiang, Xiao Ge, Hao Zhang, et al. "Hollow mesoporous SiO2 sphere nanoarchitectures with encapsulated silver nanoparticles for catalytic reduction of 4-nitrophenol." Inorganic Chemistry Frontiers 3, no. 5 (2016): 663–70. http://dx.doi.org/10.1039/c6qi00002a.
Повний текст джерелаАнотація:
Ag@hm-SiO<sub>2</sub> nanoreactors with the multi-cores/shell configuration have been successfully synthesized via an effective pre-shell/post-core strategy combined with the laser ablation treatment.
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Courtney, Amy, Luke M. Alvey, George O. T. Merces, Niamh Burke, and Mark Pickering. "The Flexiscope: a low cost, flexible, convertible and modular microscope with automated scanning and micromanipulation." Royal Society Open Science 7, no. 3 (2020): 191949. http://dx.doi.org/10.1098/rsos.191949.
Повний текст джерелаАнотація:
With technologies rapidly evolving, many research institutions are now opting to invest in costly, high-quality, specialized microscopes which are shared by many researchers. As a consequence, the user may not have the ability to adapt a microscope to their specific needs and limitations in experimental design are introduced. A flexible work-horse microscopy system is a valuable tool in any laboratory to meet the diverse needs of a research team and promote innovation in experimental design. We have developed the Flexiscope; a multi-functional, adaptable, efficient and high-performance microscopy/electrophysiology system for everyday applications in a neurobiology laboratory. The core optical components are relatively constant in the three configurations described here: an upright configuration, an inverted configuration and an upright/electrophysiology configuration. We have provided a comprehensive description of the Flexiscope. We show that this method is capable of oblique infrared illumination imaging, multi-channel fluorescent imaging and automated three-dimensional scanning of larger specimens. Image quality is conserved across the three configurations of the microscope, and conversion between configurations is possible quickly and easily, while the motion control system can be repurposed to allow sub-micrometre computer-controlled micromanipulation. The Flexiscope provides similar performance and usability to commercially available systems. However, as it can be easily reconfigured for multiple roles, it can remove the need to purchase multiple microscopes, giving significant cost savings. The modular reconfigurable nature allows the user to customize the system to their specific needs and adapt/upgrade the system as challenges arise, without requiring specialized technical skills.
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Guan, Shukai, Guicui Fu, Bo Wan, Xiangfen Wang, and Zhiqiang Chen. "Multi-Objective Optimization and Reliability Assessment of Multi-Layer Radiation Shielding for Deep Space Missions." Aerospace 12, no. 4 (2025): 337. https://doi.org/10.3390/aerospace12040337.
Повний текст джерелаАнотація:
This study proposes an advanced space radiation shielding design method that integrates multi-objective optimization with reliability evaluation to mitigate the impact of harsh space radiation environments on electronic systems. A genetic algorithm is employed to optimize multi-layer shielding configurations with respect to radiation dose reduction, mass efficiency, and structural thickness. To ensure practical applicability, a reliability evaluation framework incorporating uncertainty factors is developed, where shielding designs are considered acceptable when the risk confidence level (CL) remains below 5%. A case study simulating long-duration deep space missions demonstrates that the optimized five-layer shielding configuration reduces the radiation-induced failure rate by approximately 57%, enhancing the long-term reliability of core electronic components to 0.94 over a five-year mission. These findings validate the effectiveness of the proposed approach in supporting the development of reliable, lightweight radiation shielding for future space missions.
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Qiu, Weiming, Yonghao Chen, Dihu Chen, Tao Su, and Simei Yang. "Run-Time Hierarchical Management of Mapping, Per-Cluster DVFS and Per-Core DPM for Energy Optimization." Electronics 11, no. 7 (2022): 1094. http://dx.doi.org/10.3390/electronics11071094.
Повний текст джерелаАнотація:
Heterogeneous cluster-based multi/many-core systems (e.g., ARM big.LITTLE, supporting dynamic voltage and frequency scaling (DVFS) at cluster level and dynamic power management (DPM) at core level) have attracted much attention to optimize energy on modern embedded systems. For concurrently executing applications on such a platform, this paper aims to study how to appropriately apply the three system configurations (mapping, DVFS, and DPM) to reduce both dynamic and static energy. To this end, this paper first formulates the dependence of the three system configurations on heterogeneous cluster-based systems as a 0–1 integrated linear programming (ILP) model, taking into account run-time configuration overheads (e.g., costs of DPM mode switching and task migration). Then, with the 0–1 ILP model, different run-time strategies (e.g., considering the three configurations in fully separate, partially separate, and holistic manners) are compared based on a hierarchical management structure and design-time prepared data. Experimental case studies offer insights into the effectiveness of different management strategies on different platform sizes (e.g., #cluster × #core, 2 × 4, 2 × 8, 4 × 4, 4 × 8), in terms of application migration, energy efficiency, resource efficiency, and complexity.
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Aalsaud, Ali, Fei Xia, Ashur Rafiev, Rishad Shafik, Alexander Romanovsky, and Alex Yakovlev. "Low-Complexity Run-time Management of Concurrent Workloads for Energy-Efficient Multi-Core Systems." Journal of Low Power Electronics and Applications 10, no. 3 (2020): 25. http://dx.doi.org/10.3390/jlpea10030025.
Повний текст джерелаАнотація:
Contemporary embedded systems may execute multiple applications, potentially concurrently on heterogeneous platforms, with different system workloads (CPU- or memory-intensive or both) leading to different power signatures. This makes finding the most energy-efficient system configuration for each type of workload scenario extremely challenging. This paper proposes a novel run-time optimization approach aiming for maximum power normalized performance under such circumstances. Based on experimenting with PARSEC applications on an Odroid XU-3 and Intel Core i7 platforms, we model power normalized performance (in terms of instruction per second (IPS)/Watt) through multivariate linear regression (MLR). We derive run-time control methods to exploit the models in different ways, trading off optimization results with control overheads. We demonstrate low-cost and low-complexity run-time algorithms that continuously adapt system configuration to improve the IPS/Watt by up to 139% compared to existing approaches.
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Arbaoui, Jamal, Hassane Moustabchir, Catalin I. Pruncu, and Yves Schmitt. "Modeling and experimental analysis of polypropylene honeycomb multi-layer sandwich composites under four-point bending." Journal of Sandwich Structures & Materials 20, no. 4 (2016): 493–511. http://dx.doi.org/10.1177/1099636216659779.
Повний текст джерелаАнотація:
The behavior of a simple and innovative multi-layer sandwich panels having a polypropylene honeycomb core has been investigated carefully, theoretically and experimentally. A four-point bending test was performed to detect the mechanical characteristics of the multi-layer core. The experimental results emphasize a better rigidity of the multi-layer structure compared to the weakness displayed by the single-layer configuration. In fact, a small increase in the final weight of the component leads to a significant increase of the mechanical properties. In the second part of this study, analytical and numerical homogenization approaches were developed to compute the effective properties of the single polypropylene honeycomb core. The numerical model complies with the experimental protocol, and the simulation conducted is aiming to reproduce a typical four-point bending test on a polypropylene honeycomb multi-layer sandwich panel. Both numerical and experimental results are presented in details and a good correlation between them is highlighted.
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Hochendoner, Philip, Curtis Ogle, and William H. Mather. "A queueing approach to multi-site enzyme kinetics." Interface Focus 4, no. 3 (2014): 20130077. http://dx.doi.org/10.1098/rsfs.2013.0077.
Повний текст джерелаАнотація:
Multi-site enzymes, defined as where multiple substrate molecules can bind simultaneously to the same enzyme molecule, play a key role in a number of biological networks, with the Escherichia coli protease ClpXP a well-studied example. These enzymes can form a low latency ‘waiting line’ of substrate to the enzyme's catalytic core, such that the enzyme molecule can continue to collect substrate even when the catalytic core is occupied. To understand multi-site enzyme kinetics, we study a discrete stochastic model that includes a single catalytic core fed by a fixed number of substrate binding sites. A natural queueing systems analogy is found to provide substantial insight into the dynamics of the model. From this, we derive exact results for the probability distribution of the enzyme configuration and for the distribution of substrate departure times in the case of identical but distinguishable classes of substrate molecules. Comments are also provided for the case when different classes of substrate molecules are not processed identically.
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Faidzi, Mohd Khairul, Shahrum Abdullah, Mohamad Faizal Abdullah, Abdul Hadi Azman, Salvinder Singh Karam Singh, and David Hui. "Design selection for a hemispherical dimple core sandwich panel using hybrid multi-criteria decision-making methods." Nanotechnology Reviews 11, no. 1 (2022): 2451–68. http://dx.doi.org/10.1515/ntrev-2022-0138.
Повний текст джерелаАнотація:
Abstract The aim of this article is to determine the relationships between the essential criteria for the performance of sandwich panels and various alternative hemispherical core designs using a hybridisation technique within the multi-criteria decision-making method. A major reduction in core density reduced the structural integrity of the metal sandwich panel and promoted a significant effect of failure such as early delamination. Therefore, an effective optimisation analysis with highly precise determination is required to reduce the overall cost. The output from the finite element analysis was segregated into the nine main criteria that contributed to the sandwich panel performance. The analytical hierarchical process was used to develop a pairwise comparison matrix table and determine the weightages for each criterion. Further analysis using the technique for order preference by similarity to ideal solution (TOPSIS) was conducted to find the optimal solution for the core design. The results showed that a hemispherical dimple core design with a diameter of 6.0 mm and a depth of 3.0 mm achieved the highest-ranked closeness coefficient (CCi = 0.930 and 0.996) at both 70 and 50% of cyclic loading conditions. It was concluded that using small dimensions in the hemispherical core design configuration tends to produce better bonding strength performance in the sandwich panel, rather than configurations of larger dimensions. Hence, this method proved to be effective in determining the optimum selection, although the criteria and alternatives are intertwined, which complicates the process.
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Jiang, Xi, Xue Sheng Ji, and Jun Liu. "Multi-Resolution Modeling of High Speed Railway Infrastructure for Train Operation Simulation." Applied Mechanics and Materials 97-98 (September 2011): 560–65. http://dx.doi.org/10.4028/www.scientific.net/amm.97-98.560.
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This paper analyzes the railway infrastructure simulation demands in train operation and organization at different levels. It takes the rail road network topology model and the railway signal system model as the core to build a multi-resolution-based simulation model architecture of the railway infrastructure. According to different information needs of railway infrastructure simulation model, it proposes a Hierarchical model achieving logic function of signaling system, and studies the signal system’s multi-resolution simulation methods through multi-level logic block configuration. According to the space information requirement of different simulation levels, the paper builds a multi-resolution rail road network mode.
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Widiantoro, Andreas Gunawan, Neilcy Tjahjamooniarsih, Jannus Marpaung, Eka Kusumawardhani, and Leonardus Sandy Ade Putra. "NETWORK KPI ANALYSIS IN NETWORK SHARING TECHNOLOGY CONFIGURATION BASED ON MULTI-OPERATOR CORE NETWORK (MOCN)." Journal of Electrical Engineering, Energy, and Information Technology (J3EIT) 11, no. 2 (2023): 1. http://dx.doi.org/10.26418/j3eit.v11i2.68684.
Повний текст джерелаАнотація:
The reliable spread of BTS networks with high system capacity poses a challenge for operators in delivering services. An alternative strategy is network sharing, one of which is MOCN (Multi Operator Core Network). MOCN BTS is configured to share RF module and antenna resources by combining frequencies between operators while maintaining each operator's core. On the other hand, BTS not-pair is the conventional operator configuration where RF modules and antennas are installed independently without any connection to other operators. In this final project, a KPI data analysis is conducted for both BTS configuration to assess their reliability. Four BTS samples from two operators (IM3 and 3ID) are taken for this analysis. The analyzed KPI categories include Accessibility KPI, Retainability KPI, and Service Integrity KPI during busy hours. KPI data is obtained from field results and assisted by the technical team from Indosat Ooredoo Hutchison Pontianak. The analysis results indicate that in terms of Service Integrity KPI, BTS MOCN outperforms BTS not-pair, with a difference of 2.590175 Mbps for downlink and 0.286065 Mbps for uplink. Regarding Accessibility KPI and Retainability KPI, BTS managed by 3ID demonstrates better performance compared to those managed by IM3.
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GOU, BINGCONG, YIDONG LIU, and FENG WANG. "ELECTRON CORRELATION EFFECTS FOR DOUBLY-EXCITED STATES OF Be-LIKE Ar14+ ION." International Journal of Modern Physics B 18, no. 17n19 (2004): 2590–94. http://dx.doi.org/10.1142/s0217979204025725.
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The energies, radiative and Auger rates of the doubly excited states of Be-like Ar 14+ ion are studied by using the multi-configuration-interaction method and model potential method. The doubly excited states of Be-like Ar 14+ are labeled by the quantum numbers K, T and A to show the systematic regularity. The results show that the spectroscopy of Be-like ions is different from that of He-like ions because of the polarization and core penetration effects from the 1s2 core electrons.
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Scrugli, Matteo Antonio, Paolo Meloni, Carlo Sau, and Luigi Raffo. "Runtime Adaptive IoMT Node on Multi-Core Processor Platform." Electronics 10, no. 21 (2021): 2572. http://dx.doi.org/10.3390/electronics10212572.
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The Internet of Medical Things (IoMT) paradigm is becoming mainstream in multiple clinical trials and healthcare procedures. Thanks to innovative technologies, latest-generation communication networks, and state-of-the-art portable devices, IoTM opens up new scenarios for data collection and continuous patient monitoring. Two very important aspects should be considered to make the most of this paradigm. For the first aspect, moving the processing task from the cloud to the edge leads to several advantages, such as responsiveness, portability, scalability, and reliability of the sensor node. For the second aspect, in order to increase the accuracy of the system, state-of-the-art cognitive algorithms based on artificial intelligence and deep learning must be integrated. Sensory nodes often need to be battery powered and need to remain active for a long time without a different power source. Therefore, one of the challenges to be addressed during the design and development of IoMT devices concerns energy optimization. Our work proposes an implementation of cognitive data analysis based on deep learning techniques on resource-constrained computing platform. To handle power efficiency, we introduced a component called Adaptive runtime Manager (ADAM). This component takes care of reconfiguring the hardware and software of the device dynamically during the execution, in order to better adapt it to the workload and the required operating mode. To test the high computational load on a multi-core system, the Orlando prototype board by STMicroelectronics, cognitive analysis of Electrocardiogram (ECG) traces have been adopted, considering single-channel and six-channel simultaneous cases. Experimental results show that by managing the sensory node configuration at runtime, energy savings of at least 15% can be achieved.
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NEST, M. "DETERMINATION OF THE ELECTRONIC GROUND STATE OF MOLECULAR SYSTEMS WITH THE MULTI-CONFIGURATION TIME-DEPENDENT HARTREE–FOCK METHOD." Journal of Theoretical and Computational Chemistry 06, no. 03 (2007): 563–74. http://dx.doi.org/10.1142/s0219633607003180.
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In this paper, we present progress in the application of the explicitly time-dependent multi-configuration time-dependent Hartree–Fock (MCTDHF) method. The spin–orbitals and equations of motion are expressed in the basis of Gaussian Type Orbitals. MCTDHF is then applied to the calculation of the electronic ground state of various small molecules by imaginary time propagation. We were able to take between four and 12 active electrons into account. We discuss the suitability of a core guess as initial wave function, the possibility to obtain excited states, as well as the consequences of a neglect of core excitations.
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Xu, Min, Gang Jiang, Miao Wu, Xiangfu Li, Guojie Bian, and Feng Hu. "Multiconfiguration Dirac–Fock calculations of excitation energies and wavelengths in highly charged tungsten ions." Canadian Journal of Physics 94, no. 6 (2016): 563–68. http://dx.doi.org/10.1139/cjp-2015-0772.
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The fully relativistic multiconfiguration Dirac–Fock (MCDF) method is employed to calculate the excitation energies and wavelengths for nine isoelectronic sequences of tungsten ions. In calculations, electron correlations, quantum electrodynamical (QED) effect, and Breit correction are taken into account. The core–valence and valence–valence corrections are analyzed in a systematic way. The core setting was systematically studied for four cases of one electron occupying the outermost s orbital, one electron occupying the outermost p orbital, three electrons occupying the outermost p orbital, and one electron occupying the outermost d orbital. In our research, at least two calculation models are adopted for every tungsten ion. Through analyzing our results, it is found that the following three calculation models can help to get results closer to measured values: (i) setting the closed shells as core; (ii) taking core–valence corrections into account when there is only one valence electron; (iii) taking valence–valence corrections into account when the number of valence electrons is not less than three. The purpose of this paper is to provide some references on configuration selection and configuration interaction in calculations for a multi-electron system of highly charged tungsten ions.
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Suo, Lina, Ya-Pei Peng, Cheng-Kai Yao, Shijie Ren, Xinhe Lu, and Nan-Kuang Chen. "High Sensitivity Strain Sensors Using Four-Core Fibers through a Corner-Core Excitation." Micromachines 13, no. 3 (2022): 431. http://dx.doi.org/10.3390/mi13030431.
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A weakly-coupled multicore fiber can generate supermodes when the multi-cores are closer to enter the evanescent power coupling region. The high sensitivity strain sensors using tapered four-core fibers (FCFs) were demonstrated. The fan-in and fan-out couplers were used to carry out light coupling between singlemode fibers and the individual core of the FCFs. A broadband lightsource from superlumminescent diodes (SLDs) was launched into one of the four cores arranged in a rectangular configuration. When the FCF was substantially tapered, the asymmetric supermodes were produced to generate interferences through this corner-core excitation scheme. During tapering, the supermodes were excited based on a tri-core structure initially and then transited to a rectangular quadruple-core structure gradually to reach the sensitivity of 185.18 pm/μԑ under a tapered diameter of 3 μm. The asymmetric evanescent wave distribution due to the corner-core excitation scheme is helpful to increase the optical path difference (OPD) between supermodes for improving the strain sensitivity.
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Qiao, Zhitong, Yan Han, Xiaoxia Han, et al. "ASIC Implementation of a Nonlinear Dynamical Model for Hippocampal Prosthesis." Neural Computation 30, no. 9 (2018): 2472–99. http://dx.doi.org/10.1162/neco_a_01107.
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A hippocampal prosthesis is a very large scale integration (VLSI) biochip that needs to be implanted in the biological brain to solve a cognitive dysfunction. In this letter, we propose a novel low-complexity, small-area, and low-power programmable hippocampal neural network application-specific integrated circuit (ASIC) for a hippocampal prosthesis. It is based on the nonlinear dynamical model of the hippocampus: namely multi-input, multi-output (MIMO)–generalized Laguerre-Volterra model (GLVM). It can realize the real-time prediction of hippocampal neural activity. New hardware architecture, a storage space configuration scheme, low-power convolution, and gaussian random number generator modules are proposed. The ASIC is fabricated in 40 nm technology with a core area of 0.122 mm[Formula: see text] and test power of 84.4 [Formula: see text]W. Compared with the design based on the traditional architecture, experimental results show that the core area of the chip is reduced by 84.94% and the core power is reduced by 24.30%.
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Barg, Sobhi, and Kent Bertilsson. "Multi-objective Pareto and GAs nonlinear optimization approach for flyback transformer." Electrical Engineering 101, no. 3 (2019): 995–1006. http://dx.doi.org/10.1007/s00202-019-00836-3.
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Abstract Design and optimization of high-frequency inductive components is a complex task because of the huge number of variables to manipulate, the strong interdependence and the interaction between variables, the nonlinear variation of some design variables as well as the problem nonlinearity. This paper proposes a multi-objective design methodology of a 200-W flyback transformer in continuous conduction mode using genetic algorithms and Pareto optimality concept. The objective is to minimize loss, volume and cost of the transformer. Design variables such as the duty cycle, the winding configuration and the core shape, which have great effects on the former objectives but were neglected in previous works, are considered in this paper. The optimization is performed in discrete research space at different switching frequencies. In total, 24 magnetic materials, 6 core shapes and 2 winding configurations are considered in the database. Accurate volume and cost models are also developed to deal with the optimization in the discrete research space. The bi-objective (loss–volume) and tri-objective (loss–volume–cost) optimization results are presented, and the variations of the design variables are analyzed for the case of 60 kHz. An example of a design (30 kHz) is experimentally verified. The registered efficiency is 88% at full load.
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Carniato, Stéphane, Jean-Marc Bizau, Denis Cubaynes, et al. "Vibrationally and Spin-Orbit-Resolved Inner-Shell X-ray Absorption Spectroscopy of the NH+ Molecular Ion: Measurements and ab Initio Calculations." Atoms 8, no. 4 (2020): 67. http://dx.doi.org/10.3390/atoms8040067.
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This article presents N2+ fragment yields following nitrogen K-shell photo-absorption in the NH+ molecular ion measured at the SOLEIL synchrotron radiation facility in the photon energy region 390–450 eV. The combination of the high sensitivity of the merged-beam, multi-analysis ion apparatus (MAIA) with the high spectral resolution of the PLEIADES beamline helped to resolve experimentally vibrational structures of highly excited [N1s−1H]*+ electronic states with closed or open-shell configurations. The assignment of the observed spectral features was achieved with the help of density functional theory (DFT) and post-Hartree Fock Multiconfiguration Self-Consistent-Field/Configuration Interaction (MCSCF/CI) ab-initio theoretical calculations of the N1s core-to-valence and core-to-Rydberg excitations, including vibrational dynamics. New resonances were identified compared to previous work, owing to detailed molecular modeling of the vibrational, spin-orbit coupling and metastable state effects on the spectra. The latter are evidenced by spectral contributions from the 4Σ− electronic state which lies 0.07 eV above the NH+2Π ground state.
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Fitzgerald, Tadhg, Yuri Malitsky, Barry O’Sullivan, and Kevin Tierney. "ReACT: Real-Time Algorithm Configuration through Tournaments." Proceedings of the International Symposium on Combinatorial Search 5, no. 1 (2021): 62–70. http://dx.doi.org/10.1609/socs.v5i1.18314.
Повний текст джерелаАнотація:
The success or failure of a solver is oftentimes closely tied to the proper configuration of the solver's parameters. However, tuning such parameters by hand requires expert knowledge, is time consuming, and is error-prone. In recent years, automatic algorithm configuration tools have made significant advances and can nearly always find better parameters than those found through hand tuning. However, current approaches require significant offline computational resources, and follow a train-once methodology that is unable to later adapt to changes in the type of problem solved. To this end, this paper presents Real-time Algorithm Configuration through Tournaments (ReACT), a method that does not require any offline training to perform algorithm configuration. ReACT exploits the multi-core infrastructure available on most modern machines to create a system that continuously searches for improving parameterizations, while guaranteeing a particular level of performance. The experimental results show that, despite the simplicity of the approach, ReACT quickly finds a set of parameters that is better than the default parameters and is competitive with state-of-the-art algorithm configurators.
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Guo, Yongxing, Min Chen, Li Xiong, Xinglin Zhou, and Cong Li. "Fiber Bragg grating based acceleration sensors: a review." Sensor Review 41, no. 1 (2021): 101–22. http://dx.doi.org/10.1108/sr-10-2020-0243.
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Purpose The purpose of this study is to present the state of the art for fiber Bragg grating (FBG) acceleration sensing technologies from two aspects: the principle of the measurement dimension and the principle of the sensing configuration. Some commercial sensors have also been introduced and future work in this field has also been discussed. This paper could provide an important reference for the research community. Design/methodology/approach This review is to present the state of the art for FBG acceleration sensing technologies from two aspects: the principle of the measurement dimension (one-dimension and multi-dimension) and the principle of the sensing configuration (beam type, radial vibration type, axial vibration type and other composite structures). Findings The current research on developing FBG acceleration sensors is mainly focused on the sensing method, the construction and design of the elastic structure and the design of a new information detection method. This paper hypothesizes that in the future, the following research trends will be strengthened: common single-mode fiber grating of the low cost and high utilization rate; high sensitivity and strength special fiber grating; multi-core fiber grating for measuring single-parameter multi-dimensional information or multi-parameter information; demodulating equipment of low cost, small volume and high sampling frequency. Originality/value The principle of the measurement dimension and principle of the sensing configuration for FBG acceleration sensors have been introduced, which could provide an important reference for the research community.
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Zhang, Jingxing, Zhongzheng Lin, Jie Liu, et al. "SDM transmission of orbital angular momentum mode channels over a multi-ring-core fibre." Nanophotonics 11, no. 4 (2021): 873–84. http://dx.doi.org/10.1515/nanoph-2021-0471.
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Abstract Spatial division multiplexed optical transmission over a multi-ring-core orbital angular momentum (OAM) fibre is reported for the first time. The seven cores in the fibre each supports OAM modes belonging to mode groups (MGs) of topological charge |l| = 0–4. The MGs of |l| = 1–4 each contains four near-degenerate OAM modes that carry the combinations of opposite orbital and spin angular momenta. The weak coupling between these higher-order MGs as well as between the cores enables the simultaneous transmission of 56 OAM mode channels (two MGs per core of the topological charges |l| = 2 and 3) over the 60-km span, while only requiring modular 4 × 4 multi-input multi-output (MIMO) signal processing to equalize the mixing among the four mode channels in each MG that are strongly coupled – a feature that also minimizes the number of filter taps. The mode channels are launched using seven-core single-mode fibre fan-in devices, with the light in all seven cores converted into OAM modes via specially designed plates that carry seven off-axis-compensated phase masks matching the hexagonal configuration of the multi-core fibres. Each mode channel carries 10 WDM wavelengths, equivalently aggregating to a capacity of 31.4 Tbit/s (net 25.1 Tb/s) and a spectral efficiency (SE) of 62.7 bit/s/Hz (net 50.2 bit/s/Hz) with 28-GBaud QPSK modulation per data channel.
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Hua, Weijie, Kochise Bennett, Yu Zhang, Yi Luo, and Shaul Mukamel. "Study of double core hole excitations in molecules by X-ray double-quantum-coherence signals: a multi-configuration simulation." Chemical Science 7, no. 9 (2016): 5922–33. http://dx.doi.org/10.1039/c6sc01571a.
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Choi, Won-Seok, and Seong-Gon Choi. "Thread-Based Modeling and Analysis in Multi-Core-Based V2X Communication Device." Sustainability 14, no. 14 (2022): 8277. http://dx.doi.org/10.3390/su14148277.
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We propose a thread-based modeling and analysis method for a vehicle-to-everything (V2X) communication device, according to the performance requirements of the V2X application. For a developer to develop a V2X device or application, its performance requirements must first be determined. Furthermore, the developer selects the hardware system to enable the service to function while satisfying the performance requirements. Through this process, the developer designs and creates the program in a manner that considers thread configuration and core mapping with the given hardware resources. Then, the performance evaluation of a system is tested via instruction-level program analysis with executable programs. This process is an essential procedure for developing a program that satisfies the performance requirements. However, the debugging procedure repeated through program development, performance analysis, and program modification requires significant time and is costly. Hence, to reduce the time and cost of unnecessary work, we propose a thread-level modeling and analysis method using a queueing theory for a V2X communication device that can be applied at the design level. First, we propose a thread-level performance modeling and analysis method based on queuing theory in a multi-core-based vehicle service system. Furthermore, we analyze the performance of a multi-core-based vehicle service system utilizing the proposed method.
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Tian, Hong Wei, Hai Feng Chang, and Hong Jun Ye. "Progress in Foldcore Sandwich Manufacturing and Application." Key Engineering Materials 905 (January 4, 2022): 246–53. http://dx.doi.org/10.4028/www.scientific.net/kem.905.246.
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The sandwich structure with foldcore is a new type of structural material with light weight, high specific strength, high specific rigidity and multi-functional potential, which is connected with each other in core space, this kind of three dimensional structures can be formed by folding based on two dimensional materials. The main research achievements and characteristics of sandwich structure with foldcore in recent years are summarized and analyzed according to the lightweight and multi-functional requirements of aircraft structure in this paper. The configuration optimization scheme and fabrication process of the sandwich structure with foldcore are described. Moreover, the research status of multi-function of the sandwich structure with foldcore are summarized, including sound insulation, thermal protection, stealth performance of the structure, etc.
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Cahya Indirman, M. Didik, Giri Wahyu Wiriasto, and L. Ahmad S. Irfan Akbar. "Distributed Machine Learning using HDFS and Apache Spark for Big Data Challenges." E3S Web of Conferences 465 (2023): 02058. http://dx.doi.org/10.1051/e3sconf/202346502058.
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Hadoop and Apache Spark have become popular frameworks for distributed big data processing. This research aims to configure Hadoop and Spark for conducting training and testing on big data using distributed machine learning methods with MLlib, including linear regression and multi-linear regression. Additionally, an external library, LSTM, is used for experimentation. The experiments utilize three desktop devices to represent a series of tests on single and multi-node networks. Three datasets, namely bitcoin (3,613,767 rows), gold-price (5,585 rows), and housing-price (23,613 rows), are employed as case studies. The distributed computation tests are conducted by allocating uniform core processors on all three devices and measuring execution times, as well as RMSE and MAPE values. The results of the single-node tests using MLlib (both linear and multi-linear regression) with variations of core utilization ranging from 2 to 16 cores, show that the overall dataset performs optimally using 12 cores, with an execution time of 532.328 seconds. However, in the LSTM method, core allocation variations do not yield significant results and require longer program execution times. On the other hand, in the multinode (2) tests, optimal performance is achieved using 8 cores, with an execution time of 924.711 seconds, while in the multi-node (3) tests, the ideal configuration is 6 cores with an execution time of 881.495 seconds. In conclusion, without the involvement of HDFS, distributed MLlib programs cannot be processed, and core allocation depends on the number of nodes used and the size of the dataset.
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Jia, Hui Qin. "Design of EMC Test Software Based on Configurable File." Applied Mechanics and Materials 48-49 (February 2011): 387–90. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.387.
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According to EMC Standard,fulfilling one Test-Item generally includes below process: select and configure the parameters of instrument,form and execute the Test-Flow, therefore the main task of EMC is to configure instrument and form the Test-Item. In this paper the authors present a new method using configuration file to describe EMC Test-Item to improve the expansibility and maintainability of EMC test software. Multi-layered software architecture is designed according to EMC test operating sequence, and COM component technology is used to design the core module of each layer to guarantee plug&play for the new program-controlled instruments. Because of using the form of configuration file to describe Test-Item, the new Test-Item will be produced through Test-Engine calling Test-Item Configuration Generator. The Virtual Instrument Software Architecture is used to design and realize the frame of EMC software, and the Visual C++ software platform is used to realize the above design method. Application using configuration file make EMC software has the features of easy to use, easy update and expandability.
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Ahadi, Amir Mohammad, Hana Libenská, Tereza Košutová, et al. "Core@shell nanoparticles by inflight controlled coating." Journal of Physics D: Applied Physics 55, no. 21 (2022): 215201. http://dx.doi.org/10.1088/1361-6463/ac5559.
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Abstract Controlled synthesis of core@shell nanoparticles (NPs) for certain applications is a difficult challenge in many nanotechnology projects. In this report, a conventional arrangement composed of a gas aggregation source (GAS) is employed to generate the core NPs, which are subsequently coated by the shell materials in a secondary planar magnetron sputtering. The important difference to the usual system is the application of the two opposing planar magnetrons in a closed field configuration. The prepared core Ag NPs by a GAS are coated/treated by the two magnetrons with Ti targets. Our findings clearly show that the shell thickness can be controlled by tuning the power delivered to the secondary magnetron plasma. Characterizations of the prepared films, by x-ray diffraction technique, disclose multi-crystalline cores covered by amorphous shells. Based on x-ray photoelectron spectroscopy and energy dispersive x-ray spectroscopy measurements, different chemistry on the NPs surfaces and volume of the NPs can be achieved by tuning the operation conditions. Furthermore, the thermal annealing process leads to the growth of the crystallite size which results in emerging some microparticles caused by accelerating Ag surface mobility. The employed technique promises a reliable route to synthesize different heterogeneous NPs with stoichiometry tunable in a wide range for multi-functional devices.
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Chen, Wengang, Jiajia Chen, Bingyin Xu, Xinpeng Cong, and Wenliang Yin. "Optimal Configuration of User-Side Energy Storage for Multi-Transformer Integrated Industrial Park Microgrid." Energies 16, no. 7 (2023): 3115. http://dx.doi.org/10.3390/en16073115.
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Under a two-part tariff, the user-side installation of photovoltaic and energy storage systems can simultaneously lower the electricity charge and demand charge. How to plan the energy storage capacity and location against the backdrop of a fully installed photovoltaic system is a critical element in determining the economic benefits of users. In view of this, we propose an optimal configuration of user-side energy storage for a multi-transformer-integrated industrial park microgrid. First, the objective function of user-side energy storage planning is built with the income and cost of energy storage in the whole life cycle as the core elements. This is conducted by taking into consideration the time-of-use electricity price, demand price, on-grid electricity price, and energy storage operation and maintenance costs. Then, considering the load characteristics and bidirectional energy interaction of different nodes, a user-side decentralized energy storage configuration model is developed for a multi-transformer-integrated industrial park microgrid. Finally, combined with the engineering practice constraints, the configuration model is solved by mixed integer linear programming. The simulation test demonstrates how the proposed model can successfully increase the economic benefits of an industrial park. Electricity and demand costs are reduced by 11.90% and 19.35%, respectively, and the photovoltaic accommodation level is increased by 4.2%, compared to those without the installation of energy storage system.
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Sun, Guangfan, Changwei Guo, Junchen Ye, Chaoran Ji, Nuo Xu, and Hanqi Li. "How ESG Contribute to the High-Quality Development of State-Owned Enterprise in China: A Multi-Stage fsQCA Method." Sustainability 14, no. 23 (2022): 15993. http://dx.doi.org/10.3390/su142315993.
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The purpose of this study is to explore what configurations of dimensions corresponding to environmental, social responsibility, governance (ESG) and firm contextual factors can lead to the high-quality development of state-owned enterprises (SOEs). A configuration analysis framework with six conditions including environmental, social responsibility, and governance (ESG), innovation intensity, capital structure, and firm size was constructed. Moreover, the multi-stage qualitative comparative analysis (QCA) approach was conducted on a sample of 692 annual observations of SOEs from 2017 to 2019. Findings suggested that three equifinal patterns can produce the high-quality development of SOEs, which are resource and capability prominent pattern, sustainability driven pattern, responsibility and growth balanced pattern, respectively. Each pattern is a conjunctural combination of different ESG and firm conditions. The number of resource and capability prominent pattern decreased in the third year, while the proportion of sustainability driven pattern increased, in which the environmental dimension played a core role rather than the social dimension. Different ESG dimensions and firm conditions have both complementary and substitutive relationships, but firm size is a common condition in all configurations. This study provided a holistic empirical explanation of how ESG leads to sustainability issues in SOEs.
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Al-Qutt, Mirvat Mahmoud, Heba Khaled, and Rania El Gohary. "Neural Network Inversion-Based Model for Predicting an Optimal Hardware Configuration." International Journal of Grid and High Performance Computing 13, no. 2 (2021): 95–117. http://dx.doi.org/10.4018/ijghpc.2021040106.
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Deciding the number of processors that can efficiently speed-up solving a computationally intensive problem while perceiving efficient power consumption constitutes a major challenge to researcher in the HPC high performance computing realm. This paper exploits machine learning techniques to propose and implement a recommender system that recommends the optimal HPC architecture given the problem size. An approach for multi-objective function optimization based on neural network (neural network inversion) is employed. The neural network inversion approach is used for forward problem optimization. The objective functions in concern are maximizing the speedup and minimizing the power consumption. The recommendations of the proposed prediction systems achieved more than 89% accuracy for both validation and testing set. The experiments were conducted on 2500 CUDA core on Tesla K20 Kepler GPU Accelerator and Intel(R) Xeon(R) CPU E5-2695 v2.
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Pinho, Ana C., and Ana P. Piedade. "Sandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances." Polymers 13, no. 22 (2021): 4030. http://dx.doi.org/10.3390/polym13224030.
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With the advances in new materials, equipment, and processes, additive manufacturing (AM) has gained increased importance for producing the final parts that are used in several industrial areas, such as automotive, aeronautics, and health. The constant development of 3D-printing equipment allows for printing multi-material systems as sandwich specimens using, for example, double-nozzle configurations. The present study aimed to compare the mechanical behavior of multi-material specimens that were produced using a double-nozzle 3D printer. The materials that were included in this study were the copolymer acrylonitrile-butadiene-styrene (ABS), high-impact polystyrene (HIPS), poly(methyl methacrylate) (PMMA), and thermoplastic polyurethane (TPU). The configuration of the sandwich structures consisted of a core of TPU and the outer skins made of one of the other three materials. The mechanical behavior was evaluated through three-point bending (3PB) and transverse impact tests and compared with mono-material printed specimens. The effect of aging in artificial saliva was evaluated for all the processed materials. The main conclusion of this study was that the aging process did not significantly alter the mechanical properties for mono-materials, except for PMMA, where the maximum flexural stress decreased. In the sandwich structures, the TPU core had a softening effect, inducing a significant increase in the resilience and resistance to transverse impact. The obtained results are quite promising for applications in biomedical devices, such as protective mouthguards or teeth aligners. In these specific applications, the changes in the mechanical properties with time and with the contact of saliva assume particular importance.
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Galatus, Ramona, Nunzio Cennamo, and Emil Voiculescu. "Optimal Design of D-Type Plastic Fibers for Best Sensitivity of SPR Sensors." Advanced Engineering Forum 8-9 (June 2013): 563–73. http://dx.doi.org/10.4028/www.scientific.net/aef.8-9.563.
Повний текст джерелаАнотація:
A design method for a SPR (surface plasmon resonance) sensor based on a D-type plastic optical fiber (POF) geometry in a configuration of a multi-layered scheme is proposed in this paper. The numerical simulation for the optimal sensitivity with spectral interogation was performed in order to choose the practical implementation geometry of the SPR sensor. A side-polish to the half of the fiber's PMMA core, with about 10mm in length is made and a Microposit 1813 buffer and gold layer deposition is used for sample fabrication. The effect of different thickness of the layers in different multi-layered configuration has been investigated. The proposed setup for sensor test, measures the light intensity instead of phase difference. It can be used for refractive index changes (1.33-1.40) in real time detection of the substances for different biosensing applications. The proposed sensor is simple to use, has small size, it works on small analyt-sample size and it is cost effective for specific non-invasive application users.
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Sruthi Deva. "Optimizing Apache Kafka for efficient data ingestion." World Journal of Advanced Engineering Technology and Sciences 15, no. 2 (2025): 1081–91. https://doi.org/10.30574/wjaets.2025.15.2.0566.
Повний текст джерелаАнотація:
Apache Kafka has emerged as the industry standard for high-throughput, low-latency data ingestion across distributed systems. This article explores practical optimization strategies to maximize Kafka's performance across various deployment scenarios. Beginning with an examination of Kafka's core architecture—producers, brokers, consumers, and the topic-partition model—the discussion progresses to key optimization techniques including effective partitioning, broker configuration tuning, compression and batching, consumer group optimization, and performance monitoring. A detailed implementation example for IoT data ingestion demonstrates these principles in action, showcasing how techniques like LZ4 compression, batch configuration, and acknowledgment strategies can be applied to handle massive volumes of sensor data. The article concludes with an exploration of emerging trends including serverless Kafka implementations, multi-region deployments, machine learning integration, hardware acceleration, and autonomous scaling operations that will shape future optimization approaches.
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Nzeanorue, Christian Chukwuemeka, Ogba Samuel Nnana, Shittu Sarah Victoria, et al. "Design of Microcontroller Based Power Supply Unit with Multiple Input and Output." ALSYSTECH Journal of Education Technology 2, no. 3 (2024): 317–24. http://dx.doi.org/10.58578/alsystech.v2i3.3782.
Повний текст джерелаАнотація:
This innovative project showcases a versatile power supply module, capable of delivering both AC and DC outputs, regardless of the input power source. This user-friendly device offers multiple output options from a single unit, catering to diverse power requirements. At its core, a microcontroller (8051) expertly manages the switch and relay configuration, ensuring seamless operation. Through rigorous simulation (Matlab/Simulink) and practical testing (prototype device), our results demonstrate the module's effectiveness in providing a reliable, multi-output power supply solution, enhancing convenience and efficiency.