在行波故障测距中,传统的数据采集系统无法满足采集高速变化的暂态电压、电流行波的要求,难以实现故障的精确定位。笔者研制了一种基于PCI总线的高速数据采集系统,介绍了系统原理和硬件电路。以现场可编程门阵列(Field Programmable Gat...在行波故障测距中,传统的数据采集系统无法满足采集高速变化的暂态电压、电流行波的要求,难以实现故障的精确定位。笔者研制了一种基于PCI总线的高速数据采集系统,介绍了系统原理和硬件电路。以现场可编程门阵列(Field Programmable Gate Array,FPGA)作为中央处理器,通过高速A／D转换、同步动态随机存储器(Synchronous Dynamic Random Access Memory,SDRAM)和先进先出(First In First Out,FIFO)高速缓冲存储及PCI总线传输实现高速数据采集。该系统可实现高达100MHz的采样频率,能有效解决输电线路暂态行波的采集问题,在故障定位及微机保护中均能得到广泛应用。展开更多
Molecular Dynamics(MD)simulation for computing Interatomic Potential(IAP)is a very important High-Performance Computing(HPC)application.MD simulation on particles of experimental relevance takes huge computation time,...Molecular Dynamics(MD)simulation for computing Interatomic Potential(IAP)is a very important High-Performance Computing(HPC)application.MD simulation on particles of experimental relevance takes huge computation time,despite using an expensive high-end server.Heterogeneous computing,a combination of the Field Programmable Gate Array(FPGA)and a computer,is proposed as a solution to compute MD simulation efficiently.In such heterogeneous computation,communication between FPGA and Computer is necessary.One such MD simulation,explained in the paper,is the(Artificial Neural Network)ANN-based IAP computation of gold(Au_(147)&Au_(309))nanoparticles.MD simulation calculates the forces between atoms and the total energy of the chemical system.This work proposes the novel design and implementation of an ANN IAP-based MD simulation for Au_(147)&Au_(309) using communication protocols,such as Universal Asynchronous Receiver-Transmitter(UART)and Ethernet,for communication between the FPGA and the host computer.To improve the latency of MD simulation through heterogeneous computing,Universal Asynchronous Receiver-Transmitter(UART)and Ethernet communication protocols were explored to conduct MD simulation of 50,000 cycles.In this study,computation times of 17.54 and 18.70 h were achieved with UART and Ethernet,respectively,compared to the conventional server time of 29 h for Au_(147) nanoparticles.The results pave the way for the development of a Lab-on-a-chip application.展开更多
文摘在行波故障测距中,传统的数据采集系统无法满足采集高速变化的暂态电压、电流行波的要求,难以实现故障的精确定位。笔者研制了一种基于PCI总线的高速数据采集系统,介绍了系统原理和硬件电路。以现场可编程门阵列(Field Programmable Gate Array,FPGA)作为中央处理器,通过高速A／D转换、同步动态随机存储器(Synchronous Dynamic Random Access Memory,SDRAM)和先进先出(First In First Out,FIFO)高速缓冲存储及PCI总线传输实现高速数据采集。该系统可实现高达100MHz的采样频率,能有效解决输电线路暂态行波的采集问题,在故障定位及微机保护中均能得到广泛应用。
文摘Molecular Dynamics(MD)simulation for computing Interatomic Potential(IAP)is a very important High-Performance Computing(HPC)application.MD simulation on particles of experimental relevance takes huge computation time,despite using an expensive high-end server.Heterogeneous computing,a combination of the Field Programmable Gate Array(FPGA)and a computer,is proposed as a solution to compute MD simulation efficiently.In such heterogeneous computation,communication between FPGA and Computer is necessary.One such MD simulation,explained in the paper,is the(Artificial Neural Network)ANN-based IAP computation of gold(Au_(147)&Au_(309))nanoparticles.MD simulation calculates the forces between atoms and the total energy of the chemical system.This work proposes the novel design and implementation of an ANN IAP-based MD simulation for Au_(147)&Au_(309) using communication protocols,such as Universal Asynchronous Receiver-Transmitter(UART)and Ethernet,for communication between the FPGA and the host computer.To improve the latency of MD simulation through heterogeneous computing,Universal Asynchronous Receiver-Transmitter(UART)and Ethernet communication protocols were explored to conduct MD simulation of 50,000 cycles.In this study,computation times of 17.54 and 18.70 h were achieved with UART and Ethernet,respectively,compared to the conventional server time of 29 h for Au_(147) nanoparticles.The results pave the way for the development of a Lab-on-a-chip application.
