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Artykuły w czasopismach na temat „Hybrid Parallel Smoother”

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Data publikacji: 6 września 2023

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1

Fu, Xiaoling, Qi Zhang, Chao Wang, and Jiyun Tang. "Torque Coordination Control of Hybrid Electric Vehicles Based on Hybrid Dynamical System Theory." Electronics 8, no. 6 (2019): 712. http://dx.doi.org/10.3390/electronics8060712.

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In order to reduce the vibration caused by mode switching of hybrid electric vehicles (HEVs) and achieve smooth mode switching, the hybrid input and output automation (HIOA) model of power control system of a parallel HEV is established based on the theory of hybrid dynamical system (HDS). Taking the switching from electric drive mode to hybrid drive mode for example, the torque coordination control is considered, and the performance is compared with the method without the torque coordination by using a rule-based control strategy. The simulation results in AVL Cruise show that, on the premise

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Mandel, J., E. Bergou, S. Gürol, S. Gratton, and I. Kasanický. "Hybrid Levenberg–Marquardt and weak-constraint ensemble Kalman smoother method." Nonlinear Processes in Geophysics 23, no. 2 (2016): 59–73. http://dx.doi.org/10.5194/npg-23-59-2016.

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Abstract. The ensemble Kalman smoother (EnKS) is used as a linear least-squares solver in the Gauss–Newton method for the large nonlinear least-squares system in incremental 4DVAR. The ensemble approach is naturally parallel over the ensemble members and no tangent or adjoint operators are needed. Furthermore, adding a regularization term results in replacing the Gauss–Newton method, which may diverge, by the Levenberg–Marquardt method, which is known to be convergent. The regularization is implemented efficiently as an additional observation in the EnKS. The method is illustrated on the Loren

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Mandel, J., E. Bergou, S. Gürol, and S. Gratton. "Hybrid Levenberg–Marquardt and weak constraint ensemble Kalman smoother method." Nonlinear Processes in Geophysics Discussions 2, no. 3 (2015): 865–902. http://dx.doi.org/10.5194/npgd-2-865-2015.

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Abstract. We propose to use the ensemble Kalman smoother (EnKS) as the linear least squares solver in the Gauss–Newton method for the large nonlinear least squares in incremental 4DVAR. The ensemble approach is naturally parallel over the ensemble members and no tangent or adjoint operators are needed. Further, adding a regularization term results in replacing the Gauss–Newton method, which may diverge, by the Levenberg–Marquardt method, which is known to be convergent. The regularization is implemented efficiently as an additional observation in the EnKS. The method is illustrated on the Lore

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4

Vu, Trieu Minh, Reza Moezzi, Jindrich Cyrus, Jaroslav Hlava, and Michal Petru. "Parallel Hybrid Electric Vehicle Modelling and Model Predictive Control." Applied Sciences 11, no. 22 (2021): 10668. http://dx.doi.org/10.3390/app112210668.

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This paper presents the modelling and calculations for a hybrid electric vehicle (HEV) in parallel configuration, including a main electrical driving motor (EM), an internal combustion engine (ICE), and a starter/generator motor. The modelling equations of the HEV include vehicle acceleration and jerk, so that simulations can investigate the vehicle drivability and comfortability with different control parameters. A model predictive control (MPC) scheme with softened constraints for this HEV is developed. The new MPC with softened constraints shows its superiority over the MPC with hard constr

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5

Kehagias, Dimitris, Michael Grivas, and Grammati Pantziou. "Using a hybrid platform for cluster, NoW and GRID computing." Facta universitatis - series: Electronics and Energetics 18, no. 2 (2005): 205–18. http://dx.doi.org/10.2298/fuee0502205k.

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Clusters, Networks of Workstations (NoW) and Grids offer a new, highly available and cost-effective parallel computing paradigm. Their simplicity, versatility and unlimited power made them a rapidly adopted technology. It seems that they form the new way of computing. Although these platforms are based on the same principles, they differ significantly, needing special attention to their characteristics. Future computer scientists, programmers and analysts have to be well prepared, both about administrative and programming issues, in order to ensure faster and smoother transition. We present th

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Yang, Y. Y., D. A. Linkens, and M. Mahfouf. "Genetic algorithms and hybrid neural network modelling for aluminium stress—strain prediction." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 217, no. 1 (2003): 7–21. http://dx.doi.org/10.1177/095965180321700103.

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This paper addresses the design of genetic algorithms in developing a hybrid neural network model for aluminium alloy flow stress prediction. The hybrid neural network model consists of a parallel grey-box model structure, with the resulting predictions combining the outputs from the constitutive equations and a neural network. Previous work shows that the hybrid neural network model can deliver better model performance than a neural network model or the constitutive equations. However, the level of performance improvement of the hybrid model depends on the quality of the constitutive model us

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Zhang, S., M. J. Harrison, A. T. Wittenberg, A. Rosati, J. L. Anderson, and V. Balaji. "Initialization of an ENSO Forecast System Using a Parallelized Ensemble Filter." Monthly Weather Review 133, no. 11 (2005): 3176–201. http://dx.doi.org/10.1175/mwr3024.1.

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Abstract As a first step toward coupled ocean–atmosphere data assimilation, a parallelized ensemble filter is implemented in a new stochastic hybrid coupled model. The model consists of a global version of the GFDL Modular Ocean Model Version 4 (MOM4), coupled to a statistical atmosphere based on a regression of National Centers for Environmental Prediction (NCEP) reanalysis surface wind stress, heat, and water flux anomalies onto analyzed tropical Pacific SST anomalies from 1979 to 2002. The residual part of the NCEP fluxes not captured by the regression is then treated as stochastic forcing,

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8

Yan, Shi Tong. "Hybrid Base and Parallel Hybrid Electric Vehicle Control Strategy." Applied Mechanics and Materials 599-601 (August 2014): 956–59. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.956.

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Automotive hybrid technology development and mechanical, electrical,engine,energy technology is closely related with the development of these areas of technology, the development of hybrid technology also will be extensive. How to optimize the control strategy is the key to achieve hybrid cars low fuel consumption, low emissions targets . In the automotive power and meet other basic technical performance,and cost requirements of the premise,characteristics and operating conditions for the car's various components , control strategies to achieve a reasonable distribution of energy in the motor

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9

Kalyankar-Narwade, Supriya, Ramesh Kumar Chidambaram, and Sanjay Patil. "Neural Network- and Fuzzy Control-Based Energy Optimization for the Switching in Parallel Hybrid Two-Wheeler." World Electric Vehicle Journal 12, no. 1 (2021): 35. http://dx.doi.org/10.3390/wevj12010035.

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Optimization of a two-wheeler hybrid electric vehicle (HEV) is a typical challenge compared to that for four-wheeler HEVs. Some of the challenges which are particular to two-wheeler HEVs are throttle integration, smooth switching between power sources, add-on weight compensation, efficiency improvisation in traffic, and energy optimization. Two power sources need to be synchronized skillfully for optimum energy utilization. A prominent variant of HEV is that it easily converts conventional scooters into parallel hybrids by “Through-the-Road (TTR)” architecture. This paper focuses on three swit

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10

Pang, Ming, Yikai Shi, Wendong Wang, and Shun Pang. "Optimal sizing and control of hybrid energy storage system for wind power using hybrid Parallel PSO-GA algorithm." Energy Exploration & Exploitation 37, no. 1 (2018): 558–78. http://dx.doi.org/10.1177/0144598718784036.

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This paper proposes a frequency-based method for sizing the hybrid energy storage system in order to smoothen wind power fluctuations. The main goal of the proposed method is to find the power and energy capacities of the hybrid energy storage system that minimizes the total cost per day of all the systems. The energy management strategy used in this paper is designed as a two-level energy distribution scheme: the first level is responsible for setting the output power of hybrid energy storage system, the second level manages the power flow between the battery and supercapacitor. The hybrid pa

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11

Yan, Yun Bing, Fu Wu Yan, and Chang Qing Du. "Research on Dynamic Torque Control Strategy for Parallel Hybrid Electric Vehicle." Advanced Materials Research 228-229 (April 2011): 951–56. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.951.

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It is necessary for Parallel Hybrid Electric Vehicle (PHEV) to distribute energy between engine and motor and to control state-switch during work. Aimed at keeping the total torque unchanging under state-switch, the dynamic torque control algorithm is put forward, which can be expressed as motor torque compensation for engine after torque pre-distribution, engine speed regulation and dynamic engine torque estimation. Taking Matlab as the platform, the vehicle control simulation model is built, based on which the fundamental control algorithm is verified by simulation testing. The results demon

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12

Song, Meng Jun, Cheng Jun Ding, and Chang Juan Yu. "Workspace Analyzing for Hybrid Serial-Parallel Mechanism of a New Bionic Quadruped Robot." Applied Mechanics and Materials 713-715 (January 2015): 837–40. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.837.

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In this paper, a new bionic quadruped robot was proposed by us. The mechanism of robot we analyzed is as a hybrid series-parallel mechanism, so a new methods for constructing the kinematic model of the bionic quadruped robot very quickly and efficiently was introduced. we analyzed the workspace of the legged mechanism by using geometric composition method and numerical analysis method in the following section. Furthermore, the kinematic model of the parallel mechanism of the multi-motion mode bionic quadruped robot was constructed when the robot was in the stance phase, we also construct and s

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13

Li, Cai Lin, and Xin Wang Sun. "A Research of Reactive Compensation Scheme Based on the Hybrid Parallel Mode of SVG and PPF." Applied Mechanics and Materials 556-562 (May 2014): 3627–32. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.3627.

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A kind of hybrid parallel compensation scheme combining active compensation and passive compensation technology was proposed in this paper. The regulating function of reactive power can be realized dynamically and smoothly by means of integrating Static Var Generator (SVG) with passive filter (PPF) and then paralleling with the system load side bus. The harmonic current and voltage in the system could be filtered out. The calculation method of total compensation capacity, the determination method of SVG compensation capacity and the design method of PPF filter branches has been presented. Simu

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14

Chen, Po-Tuan, Cheng-Jung Yang, and Kuohsiu David Huang. "Dynamic Simulation and Control of a New Parallel Hybrid Power System." Applied Sciences 10, no. 16 (2020): 5467. http://dx.doi.org/10.3390/app10165467.

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To avoid unnecessary power loss during switching between the various power sources of a composite electric vehicle while achieving smooth operation, this study focuses on the development and dynamic simulation analysis of a control system for the power of a parallel composite vehicle. This system includes a power integration and distribution mechanism, which enables the two power sources of the internal combustion engine and electric motor to operate independently or in coordination to meet the different power-output requirements. The integration of the electric motor and battery-charging engi

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15

Minh, V. T., F. B. Mohd Hashim, and M. Awang. "Development of a real-time clutch transition strategy for a parallel hybrid electric vehicle." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 226, no. 2 (2011): 188–203. http://dx.doi.org/10.1177/0959651811414760.

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The present paper develops a real-time clutch transition strategy for a parallel hybrid electric vehicle (HEV) in order to achieve quick and smooth clutch transition engagements between pure electrical driving and hybrid driving. Model predictive control (MPC) has been used for this model and tested with different control horizons and weighting factors to verify the ability of MPC to control the vehicle speeds for the clutch engagement. Some modified MPC algorithms with softened constraints and with output regions have been also studied to improve the robustness and the ability of this control

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16

Fritz, Uwe, L. Lee Grismer, and Marika Asztalos. "Hybrid zones of Natrix helvetica and N. natrix: Phenotype data from iNaturalist and genetics reveal concordant clines and the value of species-diagnostic morphological traits." Vertebrate Zoology 73 (April 25, 2023): 383–95. http://dx.doi.org/10.3897/vz.73.e103319.

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Using georeferenced photographic records of 2944 grass snakes from Germany, Austria, and northern Italy as well as previously published mtDNA sequences (n = 1062) and microsatellite data (n = 952) for grass snakes from the same regions, we examined whether or not coloration and pattern reliably allow to differentiate between Natrix natrix and N. helvetica and if so, whether the distribution patterns revealed by phenotypes and genetics are congruent. Furthermore, we used cline analyses across hybrid zones to test whether the phenotypic transition from one species to the other parallels the stee

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17

Zhao, Zhiyuan, and Qilong Yuan. "Integrated Scheduling of the Production and Maintenance of Parallel Machine Job-shop Considering Stochastic Machine Breakdowns." Journal of Engineering Management and Systems Engineering 1, no. 1 (2022): 15–22. http://dx.doi.org/10.56578/jemse010103.

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The integrated scheduling of production and maintenance can make equipment maintenance in line with the production pace, so as to effectively prevent anormal interruptions of the production process due to equipment failure, and ensure the smooth implementation of the production scheduling plan. Aiming at the parallel machine job-shop environment, and considering stochastic machine failures and different degradation speeds of parallel machines, this paper introduced the minimal maintenance and preventive maintenance strategies to establish an integrated scheduling model for production and maint

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18

Krishnan, Megha G., Abhilash T. Vijayan, and Ashok Sankar. "Performance enhancement of two-camera robotic system using adaptive gain approach." Industrial Robot: the international journal of robotics research and application 47, no. 1 (2019): 45–56. http://dx.doi.org/10.1108/ir-08-2019-0174.

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Purpose This paper aims to improve the performance of a two-camera robotic feedback system designed for automatic pick and place application by modifying its velocity profile during switching of control. Design/methodology/approach Cooperation of global and local vision sensors ensures visibility of the target for a two-camera robotic system. The master camera, monitoring the workspace, guides the robot such that image-based visual servoing (IBVS) by the eye-in-hand camera transcends its inherent shortcomings. A hybrid control law steers the robot until the system switches to IBVS in a region

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Huynh, Ba-Phuc, and Yong-Lin Kuo. "Dynamic Hybrid Filter for Vision-Based Pose Estimation of a Hexa Parallel Robot." Journal of Sensors 2021 (October 16, 2021): 1–16. http://dx.doi.org/10.1155/2021/9990403.

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One of the problems with industrial robots is their ability to accurately locate the pose of the end-effector. Over the years, many other solutions have been studied including static calibration and dynamic positioning. This paper presents a novel approach for pose estimation of a Hexa parallel robot. The vision system uses three simple color feature points fixed on the surface of the end-effector to measure the pose of the robot. The Intel RealSense Camera D435i is used as a 3D measurement of feature points, which offers a cheap solution and high accuracy in positioning. Based on the constrai

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Fu, Jiangtao, Shuzhong Song, Zhumu Fu, and Jianwei Ma. "Design of coordinated control strategy during driving mode switching for parallel hybrid electric vehicles." Transactions of the Institute of Measurement and Control 41, no. 9 (2018): 2507–20. http://dx.doi.org/10.1177/0142331218803669.

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Hybrid electric vehicles (HEVs) require the power to drive the vehicle via a combination of internal combustion engine (ICE) and electric machine (EM). To improve the drivability, the smooth torque change during the driving mode switching is essential. This task can be achieved by using the coordinated control strategy. This paper presents a coordinated control strategy based on considering the different dynamic response characteristics of the ICE and the EM, which can effectively suppress the torque surge during the driving mode switching processes. The novelty lies in the proposed control is

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Al-Araji, Ahmed Sabah, and Shaymaa Jafe'er Al-Zangana. "Design of New Hybrid Neural Controller for Nonlinear CSTR System based on Identification." Journal of Engineering 25, no. 4 (2019): 70–89. http://dx.doi.org/10.31026/j.eng.2019.04.06.

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This paper proposes improving the structure of the neural controller based on the identification model for nonlinear systems. The goal of this work is to employ the structure of the Modified Elman Neural Network (MENN) model into the NARMA-L2 structure instead of Multi-Layer Perceptron (MLP) model in order to construct a new hybrid neural structure that can be used as an identifier model and a nonlinear controller for the SISO linear or nonlinear systems. Two learning algorithms are used to adjust the parameters weight of the hybrid neural structure with its serial-parallel configuration; the

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Ding, Jingang, and Xiaohong Jiao. "A Novel Control Method of Clutch During Mode Transition of Single-Shaft Parallel Hybrid Electric Vehicles." Electronics 9, no. 1 (2019): 54. http://dx.doi.org/10.3390/electronics9010054.

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The mode transition of single-shaft parallel hybrid electric vehicles (HEVs) between engine and motor has an important impact on power and drivability. Especially, in the process of mode transition from the pure motor-drive operating mode to the only engine-drive operating mode, the motor starting engine and the clutch control problem have an important influence on driving quality, and solutions have a bit of room for improving dynamic performance. In this paper, a novel mode transition control method is proposed to guarantee a fast and smooth mode transition process in this regard. First, an

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Patil, Shanawaz, A. A. Pasha, Madeva Nagaral, B. S. Raju, and L. H. Manjunath. "Effect of beryl and graphene nano platelets reinforcements on the wear behaviour of AL7075- beryl graphene particulate hybrid nano composites." Journal of Mines, Metals and Fuels 69, no. 12A (2022): 84. http://dx.doi.org/10.18311/jmmf/2021/30100.

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The effect of beryl particles and graphene nano platelets (GNPs) on the wear behaviour of Al7075-beryl-graphene hybrid composites has been studied. The hybrid composites were developed containing Al7075 matrix as matrix materials and 6 weight percentage of beryl and varying 0.5 to 2 weight percentage of graphene by using novel two step stir casting technique and wear behaviour of the newly developed hybrid composites were studied. The dry sliding wear studies conducted using a pin-on-disc tribo-tester under atmospheric conditions revealed that the wear loss of Al7075-beryl-graphene hybrid comp

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Li, Guoqiang, and Daniel Görges. "Optimal integrated energy management and shift control in parallel hybrid electric vehicles with dual-clutch transmission." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 2-3 (2019): 599–609. http://dx.doi.org/10.1177/0954407019857419.

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This paper addresses the integration of the energy management and the shift control in parallel hybrid electric vehicles with dual-clutch transmission to reduce the fuel consumption, decrease the pollutant emissions, and improve the driving comfort simultaneously. Dynamic programming with a varying weighting factor in the cost function is proposed to balance the shift frequency and the fuel consumption for the power-split control and gear schedule design. Simulation results present that the drivability can be improved with a varying weighting factor due to fewer shift events while the fuel con

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Xie, Jun, Li Hui Kuang, and Yi Zhang. "Kinematic Analysis of a Novel Hybrid Chinese Medical Massage Robot." Key Engineering Materials 464 (January 2011): 123–28. http://dx.doi.org/10.4028/www.scientific.net/kem.464.123.

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The kinematics and dynamics characteristics of Chinese medical massage manipulation, such as pressing, kneading, rolling and pushing are studied. Based on the results of this analysis, the serial mechanical arm with six rotational joints and the end actuator with 3-DOF parallel mechanism are selected, and a new type of hybrid massage robot is proposed. The kinematic equation of the robot is set up through the D-H transformation matrix in D-H coordinate system. The direct and inverse kinematic solutions of the mechanical arm are calculated. Through the introduction of the arm-shaped mark, the i

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Lechelek, Loubna, Sebastien Horna, Rita Zrour, Mathieu Naudin, and Carole Guillevin. "A Hybrid Method for 3D Reconstruction of MR Images." Journal of Imaging 8, no. 4 (2022): 103. http://dx.doi.org/10.3390/jimaging8040103.

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Three-dimensional surface reconstruction is a well-known task in medical imaging. In procedures for intervention or radiation treatment planning, the generated models should be accurate and reflect the natural appearance. Traditional methods for this task, such as Marching Cubes, use smoothing post processing to reduce staircase artifacts from mesh generation and exhibit the natural look. However, smoothing algorithms often reduce the quality and degrade the accuracy. Other methods, such as MPU implicits, based on adaptive implicit functions, inherently produce smooth 3D models. However, the i

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Pulloquinga, José L., Rafael J. Escarabajal, Jesús Ferrándiz, Marina Vallés, Vicente Mata, and Mónica Urízar. "Vision-Based Hybrid Controller to Release a 4-DOF Parallel Robot from a Type II Singularity." Sensors 21, no. 12 (2021): 4080. http://dx.doi.org/10.3390/s21124080.

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The high accuracy and dynamic performance of parallel robots (PRs) make them suitable to ensure safe operation in human–robot interaction. However, these advantages come at the expense of a reduced workspace and the possible appearance of type II singularities. The latter is due to the loss of control of the PR and requires further analysis to keep the stiffness of the PR even after a singular configuration is reached. All or a subset of the limbs could be responsible for a type II singularity, and they can be detected by using the angle between two output twist screws (OTSs). However, this an

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Zizoui, Mohamed Zine, Muhammad Fahad Zia, Bekheira Tabbache, Yassine Amirat, Abdeslam Mamoune, and Mohamed Benbouzid. "Photovoltaic-Battery-Ultracapacitor-Diesel Hybrid Generation System for Mobile Hospital Energy Supply." Electronics 11, no. 3 (2022): 390. http://dx.doi.org/10.3390/electronics11030390.

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This paper deals with the energy management of a hybrid power system, which consists of a photovoltaic (PV) system, diesel generators, battery, and ultracapacitor for a mobile hospital. The proposed power system can supply energy to shelter hospitals for better treatment of patients in remote states, particularly in the event of a pandemic situation such as Coronavirus Disease 2019 (COVID-19). For this reason, a hybrid power system in which a diesel generator is used with a photovoltaic energy source for reliable availability of power supply. Moreover, battery and ultracapacitor are also integ

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Mutarraf, Muhammad, Yacine Terriche, Niazi, Fawad Khan, Juan Vasquez, and Josep Guerrero. "Control of Hybrid Diesel/PV/Battery/Ultra-Capacitor Systems for Future Shipboard Microgrids." Energies 12, no. 18 (2019): 3460. http://dx.doi.org/10.3390/en12183460.

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In recent times, concerns over fossil fuel consumption and severe environmental pollution have grabbed attention in marine vessels. The fast development in solar technology and the significant reduction in cost over the past decade have allowed the integration of solar technology in marine vessels. However, the highly intermittent nature of photovoltaic (PV) modules might cause instability in shipboard microgrids. Moreover, the penetration is much more in the case of utilizing PV panels on ships due to the continuous movement. This paper, therefore, presents a frequency sharing approach to smo

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Krivošej, Jan, and Zbyněk Šika. "Optimization and Control of a Planar Three Degrees of Freedom Manipulator with Cable Actuation." Machines 9, no. 12 (2021): 338. http://dx.doi.org/10.3390/machines9120338.

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The paper analyzes a planar three degrees of freedom manipulator with cable actuation. Such a system can be understood as a special type of hybrid parallel kinematic mechanism composed of the rigid serial chain and the additional auxiliary cable system. The advantage of the auxiliary cable mechanism is the ability to reconfigure the whole system. The fulfillment of sufficient prestressing is the constraint of the optimization process. Computed Torque Control with a cable force distribution algorithm is implemented. The control algorithm performance is examined on different trajectories, includ

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Hu, Ban Zan, Qing Feng Wang, Hong Mei Wang, and Hong Yao. "Study on Control of the Rotational Speed of Diesel Engine under State-Switch Mode in Parallel Hybrid Hydraulic Excavator." Applied Mechanics and Materials 290 (February 2013): 97–106. http://dx.doi.org/10.4028/www.scientific.net/amm.290.97.

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In parallel hybrid hydraulic excavator (PHHE) with super capacitor, the throttle position of the diesel engine is changed with the variation of the capacitor’s state of charge (SOC) of the super capacitor. When the throttle position is switched, the rotational speed of the diesel engine cannot be able to increase or decrease to the target speed rapidly enough, and it may fluctuate in large range under given conditions. Under the assumption that the loading torque of the diesel engine is invariant at the switch instant, the response of the rotational speed appears to be in different forms, whic

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Guo, Fei, Shoukun Wang, Binkai Yue, and Junzheng Wang. "A Deformable Configuration Planning Framework for a Parallel Wheel-Legged Robot Equipped with Lidar." Sensors 20, no. 19 (2020): 5614. http://dx.doi.org/10.3390/s20195614.

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The wheel-legged hybrid robot (WLHR) is capable of adapting height and wheelbase configuration to traverse obstacles or rolling in confined space. Compared with legged and wheeled machines, it can be applied for more challenging mobile robotic exercises using the enhanced environment adapting performance. To make full use of the deformability and traversability of WHLR with parallel Stewart mechanism, this paper presents an optimization-driven planning framework for WHLR with parallel Stewart mechanism by abstracting the robot as a deformable bounding box. It will improve the obstacle negotiat

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Don, Wai-Sun, Antonio de Gregorio, Jean-Piero Suarez, and Gustaaf B. Jacobs. "Assessing the Performance of a Three Dimensional Hybrid Central-WENO Finite Difference scheme with Computation of a Sonic Injector in Supersonic Cross Flow." Advances in Applied Mathematics and Mechanics 4, no. 06 (2012): 719–36. http://dx.doi.org/10.4208/aamm.12-12s03.

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AbstractA hybridization of a high order WENO-Zfinite difference scheme and a high order central finite difference method for computation of the two-dimensional Euler equations first presented in [B. Costa and W. S. Don, J. Comput. Appl. Math., 204(2) (2007)] is extended to three-dimensions and for parallel computation. The Hybrid scheme switches dynamically from a WENO-Zscheme to a central scheme at any grid location and time instance if the flow is sufficiently smooth and vice versa if the flow is exhibiting sharp shock-type phenomena. The smoothness of the flow is determined by a high order

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Huang, Longnv, Qingyuan Wang, Jiehui Huang, et al. "A Novel Hybrid Predictive Model for Ultra-Short-Term Wind Speed Prediction." Energies 15, no. 13 (2022): 4895. http://dx.doi.org/10.3390/en15134895.

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A novel hybrid model is proposed to improve the accuracy of ultra-short-term wind speed prediction by combining the improved complete ensemble empirical mode decomposition with adaptive noise (ICEEMDAN), the sample entropy (SE), optimized recurrent broad learning system (ORBLS), and broadened temporal convolutional network (BTCN). First, ICEEMDAN is introduced to smooth the nonlinear part of the wind speed data by decomposing the raw wind speed data into a series of sequences. Second, SE is applied to quantitatively assess the complexity of each sequence. All sequences are divided into simple

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Kuo, Hsien-Yu, and Tyng Liu. "On the Design of Continuously Variable Transmissions with Bidirectional Bridge Structures for Hybrid Vehicles." Applied Sciences 11, no. 6 (2021): 2500. http://dx.doi.org/10.3390/app11062500.

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To increase the energy efficiency of road vehicles, an ideal transmission system should have a wide ratio coverage, a high torque capacity, and a high mechanical efficiency. Continuously variable units (CVUs) have been successfully implemented due to the smooth ratio variation, sufficient torque capacity, and ratio coverage. Hence, it will be beneficial to develop a hybrid powertrain comprising a CVU. In this paper, a design method called the “basic path diagram” (BPD) is proposed. It provides a simplified schematic of the system and represents the generic connections among the mechanical comp

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Kanda, Keiichi, and Takehisa Matsuda. "Mechanical Stress-Induced Orientation and Ultrastructural Change of Smooth Muscle Cells Cultured in Three-Dimensional Collagen Lattices." Cell Transplantation 3, no. 6 (1994): 481–92. http://dx.doi.org/10.1177/096368979400300605.

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The effect of tensile stress on the orientation and phenotype of arterial smooth muscle cells (SMCs) cultured in three-dimensional (3D) type I collagen gels was morphologically investigated. Ring-shaped hybrid tissues were prepared by thermal gelation of a cold mixed solution of type I collagen and SMCs derived from bovine aorta. The tissues were subjected to three different modes of tensile stress. They were floated (isotonic control), stretched isometrically (static stress) and periodically stretched and recoiled by 5% above and below the resting tissue length at 60 RPM frequency (dynamic st

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Lei, Tongfei, Saleem Riaz, Noor Zanib, Munira Batool, Feng Pan, and Shaoguo Zhang. "Performance Analysis of Grid-Connected Distributed Generation System Integrating a Hybrid Wind-PV Farm Using UPQC." Complexity 2022 (March 18, 2022): 1–14. http://dx.doi.org/10.1155/2022/4572145.

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This work presents a distributed generation system (DG) that combines system of a wind turbine (WT) and photovoltaic (PV) using a unified power quality conditioner (UPQC). Along with providing active power (AP) to the utility grid, Wind-PV-UPQC improves PQ indicators, for example, voltage drops/surges, harmonics of grid voltages, and PF. Since Wind-PV-UPQC depends on dual compensation scheme, the parallel converter works as a sinusoidal voltage source, while the series converter works as a sinusoidal current source. In this way, a smooth transition from grid operation to island operation and v

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Lin, Yu-Hsiu, Kai-Lung Hua, Yung-Yao Chen, I.-Ying Chen, and Yun-Chen Tsai. "A New Photographic Reproduction Method Based on Feature Fusion and Virtual Combined Histogram Equalization." Sensors 21, no. 18 (2021): 6038. http://dx.doi.org/10.3390/s21186038.

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A desirable photographic reproduction method should have the ability to compress high-dynamic-range images to low-dynamic-range displays that faithfully preserve all visual information. However, during the compression process, most reproduction methods face challenges in striking a balance between maintaining global contrast and retaining majority of local details in a real-world scene. To address this problem, this study proposes a new photographic reproduction method that can smoothly take global and local features into account. First, a highlight/shadow region detection scheme is used to ob

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Parfenіuk, O. А., and S. H. Trush. "Performance potential of sugar beets with improved beetroot shape in breeding for heterosis." Plant Breeding and Seed Production, no. 119 (July 12, 2021): 34–43. http://dx.doi.org/10.30835/2413-7510.2021.236995.

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Purpose. To increase the performance of sugar beet hybrids using integrated approaches to the creation, identification and selection of combination-valuable parents; to evaluate the performance potential of experimental hybrids derived from parents with improved beetroot shape. Materials and methods. The study was conducted in the Laboratory of Sugar Beet Breeding of the Tobacco Experimental Station of the National Research Center “Institute of Agriculture of NAAS” in 2018–2020. Sixty-six experimental diploid sugar beet hybrids originating from parents of different genetic origin were te

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Tan, B.-K., K. Rudakov, V. P. Koshelets, A. Khudchenko, A. M. Baryshev, and G. Yassin. "Comparing the performance of 850 GHz integrated bias-tee superconductor-insulator-superconductor (SIS) mixers with single- and parallel-junction tuner." Superconductor Science and Technology 35, no. 12 (2022): 125008. http://dx.doi.org/10.1088/1361-6668/ac9d6e.

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Abstract We present and compare the design and performance of two 850 GHz radial probe fed superconductor-insulator-superconductor mixers, where the antenna is aligned perpendicular to the E-Plane of the input full-height rectangular waveguide connected to a multiple flare-angles smooth-walled horn. Both designs are comprised of 0.5 µm2 hybrid niobium/aluminium-nitride/niobium-nitride tunnel junction, fabricated on top of a niobium titanium nitride ground plane with an Al wiring layer. The entire superconducting circuit is supported with a 40 µm thick quartz substrate. The major difference bet

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Anselma, Pier Giuseppe. "Dynamic Programming Based Rapid Energy Management of Hybrid Electric Vehicles with Constraints on Smooth Driving, Battery State-of-Charge and Battery State-of-Health." Energies 15, no. 5 (2022): 1665. http://dx.doi.org/10.3390/en15051665.

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Dynamic programming (DP) is currently the reference optimal energy management approach for hybrid electric vehicles (HEVs). However, several research concerns arise regarding the effective application of DP for optimal HEV control problems which involve a significant number of control variables, state variables and optimization constraints. This paper deals with an optimal control problem for a full parallel P2 HEV with constraints on battery state-of-charge (SOC), battery lifetime in terms of state-of-health (SOH), and smooth driving in terms of the frequencies of internal combustion engine (

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Dariusz, Strąk. "Performance investigation of hybrid photovoltaic thermal-heat with mini-channels for application in electric vehicles." Archives of Automotive Engineering – Archiwum Motoryzacji 100, no. 2 (2023): 1–26. http://dx.doi.org/10.14669/am/166810.

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The first autonomous car was developed in the 1980s, but it wasn't until the early 2010s that the technology began to gain significant attention and investment. In 2010, Google began testing self-driving cars on public roads, and since then, many other companies have joined the race to develop fully autonomous vehicles. Hybrid PVT (Photovoltaic Thermal) heat exchangers cooled with mini-channels find application in autonomous vehicles as a solution that enables efficient cooling of the vehicle's electronics and batteries. The solution involves using photovoltaic panels to generate electricity a

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Khan, Umair, Aurang Zaib, Anuar Ishak, et al. "Impact of Buoyancy and Stagnation-Point Flow of Water Conveying Ag-MgO Hybrid Nanoparticles in a Vertical Contracting/Expanding Riga Wedge." Symmetry 14, no. 7 (2022): 1312. http://dx.doi.org/10.3390/sym14071312.

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Riga surface can be utilized to reduce the pressure drag and the friction of the submarine by stopping the separation of the boundary layer as well as by moderating turbulence production. Therefore, the current symmetry of the work investigates the slip impacts on mixed convection flow containing water-based hybrid Ag-MgO nanoparticles over a vertical expanding/contracting Riga wedge. In this analysis, a flat surface, wedge, and stagnation point are also discussed. A Riga surface is an actuator that contains electromagnetic where a span-wise array associated with the permanent magnets and irre

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Liu, Yu, Lianghua Huang, Pan Pan, Bin Wang, Yinghui Xu, and Rong Jin. "Train a One-Million-Way Instance Classifier for Unsupervised Visual Representation Learning." Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 10 (2021): 8706–14. http://dx.doi.org/10.1609/aaai.v35i10.17055.

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This paper presents a simple unsupervised visual representation learning method with a pretext task of discriminating all images in a dataset using a parametric, instance-level classifier. The overall framework is a replica of a supervised classification model, where semantic classes (e.g., dog, bird, and ship) are replaced by instance IDs. However, scaling up the classification task from thousands of semantic labels to millions of instance labels brings specific challenges including 1) the large-scale softmax computation; 2) the slow convergence due to the infrequent visiting of instance samp

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Nandede, Aniket H., Yogesh K. Bhateshwar, and Kamal C. Vora. "Development of EMS for Hybrid Electric Two-Wheeler." International Journal of Engineering Sciences 15, no. 1 (2022). http://dx.doi.org/10.36224/ijes.150105.

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Rising the emission level from conventional vehicles (CV) is a major concern of today’s world. Electric vehicle (EV) and hybrid electric vehicles (HEV) technology are two ways to deal with it. EV technology is an emerging technology but they have some challenges in adopting the EV technology. So, this paper deals with modelling and simulation of a hybrid electric vehicle such as series hybrid electric vehicle and parallel hybrid electric vehicle with different energy management strategies. The heart of HEV development is energy management strategy (EMS), on which vehicle’s performance and fuel

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Canova, Marcello, Yann Guezennec, and Steve Yurkovich. "On the Control of Engine Start/Stop Dynamics in a Hybrid Electric Vehicle." Journal of Dynamic Systems, Measurement, and Control 131, no. 6 (2009). http://dx.doi.org/10.1115/1.4000066.

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The starter/alternator technology is considered an easily realizable hybrid electric vehicle (HEV) configuration to achieve significant fuel economy without compromising consumer acceptability. Several examples can be found in production or near-production vehicles, with implementation based on a spark ignition (SI) engine coupled with either a belted starter/alternator (BSA) or an integrated starter/alternator (ISA). One of the many challenges in successfully developing a starter/alternator HEV is to achieve engine start and stop operations with minimum passenger discomfort. This requires con

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Kassa Mersha, Tewodros, and Changqing Du. "Active damping control of HEVs using Ansys and Matlab/Simulink software." Journal of Vibroengineering, July 27, 2022. http://dx.doi.org/10.21595/jve.2022.22511.

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This paper presents Parallel Hybrid Electric Vehicles (HEVs) powertrain design as well as a motor-based control approach that is designed to control or reduce driveline oscillations by introducing a Proportional-Integral-Derivative (PID) controller and a Fuzzy logic sliding mode controller. Because the torque of the electric motor can be decreased or increased more quickly than that of the Internal Combustion Engine (ICE), the vibration increases significantly. To solve this problem, an electric motor control-based Active Damping Control (ADC) strategy is employed to assure smooth driveline fu

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"Preface." IOP Conference Series: Earth and Environmental Science 955, no. 1 (2022): 011001. http://dx.doi.org/10.1088/1755-1315/955/1/011001.

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Excellency, Drs. Bedjo Santoso, MT. Ph. D., Rector Universitas Islam Sultan Agung; Honorable, Assoc. Prof. Dr. Mohd Ismid Bin Md Said, Pro-Vice Chancellor (International) UTM; Respectable, The distinguished guests and the participants, ladies and gentlemen. Welcome to the International Forum on Integrated Infrastructure Development (InFInID 2021) Hybrid Conference, which consists of 12th International Conference on Geotechnical Engineering in Tropical Regions (GEOTROPIKA), 2nd International Conference on Highway and Transportation Engineering (ICHITRA), and The 4th International Conference on

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Xie, Jiaxiang. "Effect of matrix composition on properties of polyamide 66/polyamide 6I-6T composites with high content of continuous glass fiber for optimizing surface performance." e-Polymers 23, no. 1 (2023). http://dx.doi.org/10.1515/epoly-2022-8111.

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Abstract To optimize the surface performance of the composites of polyamide 66 and continuous glass fiber (50/50, weight ratio), poly(hexamethylene isoftalamide-co-terephthalamide) (PA6I-6T) was introduced. The composites were prepared by a twin-screw extruder, and the effect of PA6I-6T on the thermal and mechanical properties, as well as surface appearance was investigated. The results showed that the crystallization temperature and the melting point of the composites decreased with increasing the amount of PA6I-6T. The Jeziorny method proved that the presence of PA6I-6T did not change the nu

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Jefferson-Loveday, Richard J. "Differential Equation-Based Specification of Turbulence Integral Length Scales for Cavity Flows." Journal of Engineering for Gas Turbines and Power 139, no. 6 (2017). http://dx.doi.org/10.1115/1.4035602.

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A new modeling approach has been developed that explicitly accounts for expected turbulent eddy length scales in cavity zones. It uses a hybrid approach with Poisson and Hamilton–Jacobi differential equations. These are used to set turbulent length scales to sensible expected values. For complex rim-seal and shroud cavity designs, the method sets an expected length scale based on local cavity width which accurately accounts for the large-scale wakelike flow structures that have been observed in these zones. The method is used to generate length scale fields for three complex rim-seal geometrie

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