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Artykuły w czasopismach na temat „Mathematical models-overhead costs”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 21 lutego 2023

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1

Bogachkov, I. M., and R. N. Khamitov. "Algorithm to select the voltage class for the gas field electricity supply system." Vestnik IGEU, no. 2 (April 30, 2021): 32–39. http://dx.doi.org/10.17588/2072-2672.2021.2.032-039.

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The current algorithms and mathematical models to select the voltage class based on the theory of experimental planning are developed for industrial enterprises (overhead lines with a length of up to 10 km, a power of up to 20 MV, a radial arrangement with a transformation at the end of the line). They do not consider the features of gas fields (overhead lines with a length of up to 20 km and a capacity of 1 MV with a projected growth of up to 10 MV, a transmission network with one pass-through trunk line with distributed transformation along the line). Currently, to develop a mathematical mod
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Hamdollahzadeh, Ali, and Kamran Jamali Firouzabadi. "A Model to Determine Optimal Composition of Production to Obtain Maximum Profit & Reduce Overhead Costs by Linear Programming." Modern Applied Science 10, no. 10 (September 26, 2016): 289. http://dx.doi.org/10.5539/mas.v10n10p289.

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There are many factors which put emphasize on the importance of developing pharmaceutical industry such as human health, reduced rate of using medicines, improve healthcare to global level, influence of pharmaceutical industry on exchange market, creating job and etc. Growing improvements in production systems, appearance of mechanized systems and dynamic commercial markets have highlighted the requirements of planning. This study aims to provide a model for defining the optimal composition of production in Sobhan Darou Pharmaceutical Company to obtain maximum profits and reduce overhead costs
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Kovalyov, М. Ya, B. M. Rozin, and I. A. Shaternik. "Approach to optimizing charging infrastructure of autonomous trolleybuses for urban routes." Informatics 18, no. 4 (December 31, 2021): 79–95. http://dx.doi.org/10.37661/1816-0301-2021-18-4-79-95.

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P u r p o s e s. When designing a system of urban electric transport that charges while driving, including autonomous trolleybuses with batteries of increased capacity, it is important to optimize the charging infrastructure for a fleet of such vehicles. The charging infrastructure of the dedicated routes consists of overhead wire sections along the routes and stationary charging stations of a given type at the terminal stops of the routes. It is designed to ensure the movement of trolleybuses and restore the charge of their batteries, consumed in the sections of autonomous running.The aim of
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Kachanov, A. N., D. A. Korenkov, A. A. Revkov, V. V. Maksimov, and O. V. Vorkunov. "Words high-frequency drying processes simulation of wooden tangent towers in a vacuum chamber." Power engineering: research, equipment, technology 22, no. 6 (March 26, 2021): 130–42. http://dx.doi.org/10.30724/1998-9903-2020-22-6-130-142.

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THE PURPOSE. The service life duration of wooden tangent towers used on overhead transmission lines with a voltage of up to 35 kV depends on the quality of lumber drying and subsequent impregnation. The drying of tangent tower workpieces is currently carried out by atmospheric or convective methods and is the longest and one of the energy-consuming stages of their production. At the same time, there are promising electrotechnological drying installations that can reduce the duration and improve drying quality at comparable specific energy costs. Such installations include vacuum high-frequency
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Elghaish, Faris, M. Reza Hosseini, Saeed Talebi, Sepehr Abrishami, Igor Martek, and Michail Kagioglou. "Factors Driving Success of Cost Management Practices in Integrated Project Delivery (IPD)." Sustainability 12, no. 22 (November 16, 2020): 9539. http://dx.doi.org/10.3390/su12229539.

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Integrated project delivery (IPD) is a mode of project procurement recognised as facilitating superior project performance. However, this success is contingent on effective cost management practices that share cost data with all project stakeholders in an accurate, timely and transparent manner. Despite an extensive literature on aspects of cost management, none identifies the essential ingredients required of an effective cost management system, sufficiently robust to support successful IPD projects. Candidate cost management augmenting practices are drawn from the literature, and presented f
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Leśniak, Agnieszka. "Statistical Methods in Bidding Decision Support for Construction Companies." Applied Sciences 11, no. 13 (June 27, 2021): 5973. http://dx.doi.org/10.3390/app11135973.

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On the border of two phases of a building life cycle (LC), the programming phase (conception and design) and the execution phase, a contractor is selected. A particularly appropriate method of selecting a contractor for the construction market is the tendering system. It is usually based on quality and price criteria. The latter may involve the price (namely, direct costs connected with works realization as well as mark-ups, mainly overhead costs and profit) or cost (based on the life cycle costing (LCC) method of cost efficiency). A contractor’s decision to participate in a tender and to calc
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Akhmadi, Akhmadi, Etty Siswati, and Nurrasyidah Putri. "Studi Komparatif Tingkat Pendapatan Antara Usaha Kelapa dan Pinang pada Perkebunan Rakyat Desa Sungai Beras Kabupaten Tanjab Timur." Eksis: Jurnal Ilmiah Ekonomi dan Bisnis 10, no. 2 (January 31, 2020): 68. http://dx.doi.org/10.33087/eksis.v10i2.164.

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This type of research is quantitative research that is research using data expressed in numerical form on parts and phenomena and their relationships. This research usually aims to develop and use mathematical models, theories or hypotheses related to natural phenomena. This research is a survey and interview directly to the owners of coconut and areca nut business and records everything that the writer needs in connection with the problem of the writer. In this study using data analysis methods, namely qualitative data analysis. Qualitative data is data in the form of not numbers but with wor
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8

Ajjaj, Souad, Souad El Houssaini, Mustapha Hain, and Mohammed-Alamine El Houssaini. "Performance Assessment and Modeling of Routing Protocol in Vehicular Ad Hoc Networks Using Statistical Design of Experiments Methodology: A Comprehensive Study." Applied System Innovation 5, no. 1 (February 2, 2022): 19. http://dx.doi.org/10.3390/asi5010019.

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The performance assessment of routing protocols in vehicular ad hoc networks (VANETs) plays a critical role in testing the efficiency of the routing algorithms before deployment in real conditions. This research introduces the statistical design of experiments (DOE) methodology as an innovative alternative to the one factor at a time (OFAT) approach for the assessment and the modeling of VANET routing protocol performance. In this paper, three design of experiments methods are applied, namely the two-level full factorial method, the Plackett–Burman method and the Taguchi method, and their outc
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Pereverzyev, K., V. Vasenko, and G. Domanska. "The technology of a condition based maintenance of an overhead contact line with Markov approximation of contact wire wear." Lighting engineering and power engineering 1, no. 57 (April 6, 2020): 3–8. http://dx.doi.org/10.33042/2079-424x-2020-1-57-3-8.

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The technologies of OCL condition based maintenance were improved for providing reliable and economic current collecting on electrified railways and in traction power networks of urban electric transport. It is established that one of the most perspective methods of reducing operating costs is the transition to scientifically justified terms of repair and planning of works based on the actual state of OCL, the reliability of which is determined by the reliability, repair suitability and durability of the elements. The basic criteria of the current collecting process are proposed: the value of
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10

Ferrucci, Filomena, Pasquale Salza, and Federica Sarro. "Using Hadoop MapReduce for Parallel Genetic Algorithms: A Comparison of the Global, Grid and Island Models." Evolutionary Computation 26, no. 4 (December 2018): 535–67. http://dx.doi.org/10.1162/evco_a_00213.

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The need to improve the scalability of Genetic Algorithms (GAs) has motivated the research on Parallel Genetic Algorithms (PGAs), and different technologies and approaches have been used. Hadoop MapReduce represents one of the most mature technologies to develop parallel algorithms. Based on the fact that parallel algorithms introduce communication overhead, the aim of the present work is to understand if, and possibly when, the parallel GAs solutions using Hadoop MapReduce show better performance than sequential versions in terms of execution time. Moreover, we are interested in understanding
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11

Naksinehaboon, Nichamon, Mihaela P[un, Raja Nassar, Chokchai Box Leangsuksun, and Stephen Scott. "High Performance Computing Systems with Various Checkpointing Schemes." International Journal of Computers Communications & Control 4, no. 4 (December 1, 2009): 386. http://dx.doi.org/10.15837/ijccc.2009.4.2455.

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Finding the failure rate of a system is a crucial step in high performance computing systems analysis. To deal with this problem, a fault tolerant mechanism, called checkpoint/ restart technique, was introduced. However, there are additional costs to perform this mechanism. Thus, we propose two models for different schemes (full and incremental checkpoint schemes). The models which are based on the reliability of the system are used to determine the checkpoint placements. Both proposed models consider a balance of between checkpoint overhead and the re-computing time. Due to the extra costs fr
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12

Juszczyk, Michał, and Agnieszka Leśniak. "Modelling Construction Site Cost Index Based on Neural Network Ensembles." Symmetry 11, no. 3 (March 20, 2019): 411. http://dx.doi.org/10.3390/sym11030411.

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Construction site overhead costs are key components of cost estimation in construction projects. The estimates are expected to be accurate, but there is a growing demand to shorten the time necessary to deliver cost estimates. The balancing (symmetry) between time of calculation and satisfaction of reliable estimation was the reason for developing a new model for cost estimation in construction. This paper reports some results from the authors’ broad research on the modelling processes in engineering related to estimation of construction costs using artificial intelligence tools. The aim of th
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Xu, Ming, Jinlong Wang, Ang Zhang, and Shengli Liu. "Probabilistic Value-Centric Optimization Design for Fractionated Spacecrafts Based on Unscented Transformation." Mathematical Problems in Engineering 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/132920.

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Fractionated spacecrafts are of particular interest for pointing-intensive missions because of their ability to decouple physically the satellite bus and some imaging payloads, which possess a lesser lifecycle cost than a comparable monolithic spacecraft. Considering the probabilistic uncertainties during the mission lifecycle, the cost assessment or architecture optimization is essentially a stochastic problem. Thus, this research seeks to quantitatively assess different spacecraft architecture strategies for remote-sensing missions. A dynamical lifecycle simulation and parametric models are
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14

Basu, Aveek, and Sanchita Ghosh. "Implementing Fuzzy TOPSIS in Cloud Type and Service Provider Selection." Advances in Fuzzy Systems 2018 (November 15, 2018): 1–12. http://dx.doi.org/10.1155/2018/2503895.

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Cloud computing can be considered as one of the leading-edge technological advances in the current IT industry. Cloud computing or simply cloud is attributed to the Service Oriented Architecture. Every organization is trying to utilize the benefit of cloud not only to reduce the cost overhead in infrastructure, network, hardware, software, etc., but also to provide seamless service to end users with the benefit of scalability. The concept of multitenancy assists cloud service providers to leverage the costs by providing services to multiple users/companies at the same time via shared resource.
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Gabbay, Freddy, Benjamin Salomon, and Gil Shomron. "Structured Compression of Convolutional Neural Networks for Specialized Tasks." Mathematics 10, no. 19 (October 8, 2022): 3679. http://dx.doi.org/10.3390/math10193679.

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Convolutional neural networks (CNNs) offer significant advantages when used in various image classification tasks and computer vision applications. CNNs are increasingly deployed in environments from edge and Internet of Things (IoT) devices to high-end computational infrastructures, such as supercomputers, cloud computing, and data centers. The growing amount of data and the growth in their model size and computational complexity, however, introduce major computational challenges. Such challenges present entry barriers for IoT and edge devices as well as increase the operational expenses of l
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16

Marwah, Gagan Preet Kour, Anuj Jain, Praveen Kumar Malik, Manwinder Singh, Sudeep Tanwar, Calin Ovidiu Safirescu, Traian Candin Mihaltan, Ravi Sharma, and Ahmed Alkhayyat. "An Improved Machine Learning Model with Hybrid Technique in VANET for Robust Communication." Mathematics 10, no. 21 (October 30, 2022): 4030. http://dx.doi.org/10.3390/math10214030.

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The vehicular ad hoc network, VANET, is one of the most popular and promising technologies in intelligent transportation today. However, VANET is susceptible to several vulnerabilities that result in an intrusion. This intrusion must be solved before VANET technology can be adopted. In this study, we suggest a unique machine learning technique to improve VANET’s effectiveness. The proposed method incorporates two phases. Phase I detects the DDoS attack using a novel machine learning technique called SVM-HHO, which provides information about the vehicle. Phase II mitigates the impact of a DDoS
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Elghaish, Faris, Sepehr Abrishami, M. Reza Hosseini, and Soliman Abu-Samra. "Revolutionising cost structure for integrated project delivery: a BIM-based solution." Engineering, Construction and Architectural Management ahead-of-print, ahead-of-print (August 11, 2020). http://dx.doi.org/10.1108/ecam-04-2019-0222.

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PurposeThe amalgamation of integrated project delivery (IPD) and building information modelling (BIM) is highly recommended for successful project delivery. However, IPD lacks an accurate cost estimation methodology at the “front-end” of projects, when little project information is available. This study aims to tackle this issue, through presenting analytical aspects, theoretical grounds and practical steps/procedures for integrating target value design (TVD), activity-based costing (ABC) and Monte Carlo simulation into the IPD cost structure, within a BIM-enabled platform.Design/methodology/a
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Lockhart, Shelby, Amanda Bienz, William Gropp, and Luke Olson. "Performance Analysis and Optimal Node-Aware Communication for Enlarged Conjugate Gradient Methods." ACM Transactions on Parallel Computing, January 17, 2023. http://dx.doi.org/10.1145/3580003.

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Krylov methods are a key way of solving large sparse linear systems of equations, but suffer from poor strong scalability on distributed memory machines. This is due to high synchronization costs from large numbers of collective communication calls alongside a low computational workload. Enlarged Krylov methods address this issue by decreasing the total iterations to convergence, an artifact of splitting the initial residual and resulting in operations on block vectors. In this paper, we present a performance study of an Enlarged Krylov Method, Enlarged Conjugate Gradients (ECG), noting the im
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