Current Issue : April - June Volume : 2021 Issue Number : 2 Articles : 5 Articles
GPU cards have been used for scientific calculations for many years. Despite their\never-increasing performance, there are cases where they may still have problems. This article\naddresses possible performance and memory issues and their solutions that may occur during GPU\ncalculations of iterative algorithms. Specifically, the article focuses on the optimization of transient\nsimulation of extra-large highly nonlinear time-dependent circuits in SPICE-like electronic circuit\nsimulator core enhanced with NVIDIA/CUDA (Compute Unified Device Architecture) interface\nand iterative Krylov Subspace methods with emphasis on improved accuracy. The article presents\nprocedures for solving problems that may occur during this integration and negatively affect either\nthe simulation speed or the accuracy of the calculation. Finally, a comparison of the implementation\nof an iterative calculation procedure with the use of GPU cards, calculation by the direct method and\ncalculation on the CPU only is presented....
The outdoor wind environment is one of the most important factors influencing the biological environment and human comfort.\nThe campus of China University of Mining & Technology (Beijing) (CUMTB) is the case study for this research. PHOENICS\nsimulation software was used to carry out a numerical simulation study of the outdoor wind environment. The pedestrian-level\nwind (PLW) environments for both winter and summer were investigated. Based on the numerical simulation results, the overall\nevaluation and subregional analysis of the campusâ?? current outdoor wind environment were carried out. Then, according to the\nresults and problems of wind environment assessment, improvement measures and strategies of outdoor wind environment in\nuniversities are proposed from the aspects of campus planning, single building form, and greening configuration....
With the constant expansion of the building sector as a major energy consumer in the modern\nworld, the significance of energy-efficient building systems cannot be more emphasized. Most of the\nbuildings are now equipped with an electric dashboard to record consumption data which presents\na significant scope of research by utilizing those data in energy modeling. This paper investigates\nconventional regression modeling in building energy estimation and proposes three models with\ndata classifications to improve their performance. The proposed models are regression models\nand an artificial neural network model with data classification for predicting hourly or sub-hourly\nenergy usage in four different buildings....
The new type of marine asynchronous shaft generator has the advantages of adjustable excitation and power factor, compared to\nthe traditional synchronous shaft generator, and has been widely used. However, the traditional synchronous shaft generator\nsimulation system is still used in domestic ship power station simulators, which seriously restricts the renewal of crew training. In\norder to overcome the shortage of the simulation system of doubly fed shaft generator for ship power plant simulator, in this\npaper, the mathematical model of marine doubly fed shaft system is established for the first time, according to the characteristics of\ndoubly fed machine and marine shaft generator....
Thermophotovoltaic (TPV) systems generate electricity without the limitations of radiation\nintermittency, which is the case in solar photovoltaic systems. As energy demands steadily increase,\nthere is a need to improve the conversion dynamics of TPV systems. Consequently, this study\nproposes a novel radiation-thermodynamic model to gain insights into the thermodynamics of TPV\nsystems. After validating the model, parametric studies were performed to study the dependence\nof power generation attributes on the radiator and PV cell temperatures....
Loading....