为了克服商业倒立摆存在通用性差,不便于改装升级,不利于新的控制算法探索和研究等问题,一种实时倒立摆系统被设计和实现。系统硬件采用PC机+运动控制器方式;软件采用Real-Time Windows Target方式,使用SIMULINKC MEX S函数在PC机上开...为了克服商业倒立摆存在通用性差,不便于改装升级,不利于新的控制算法探索和研究等问题,一种实时倒立摆系统被设计和实现。系统硬件采用PC机+运动控制器方式;软件采用Real-Time Windows Target方式,使用SIMULINKC MEX S函数在PC机上开发了设备驱动模块,并通驱动模块构成实时倒立摆控制系统。实验结果表明,该系统通用性能高,倒立摆系统的软件和硬件参数完全已知,无任何加密或者固化,便于改装和升级,也方便算法研究者进行算法设计和实现。展开更多
The concept of fault junction is proposed to describe the relationship between the two faults by the authors. The junction relationship between Ganjiang and Tanlu faults is analyzed in this paper, and this has been el...The concept of fault junction is proposed to describe the relationship between the two faults by the authors. The junction relationship between Ganjiang and Tanlu faults is analyzed in this paper, and this has been elucidated through numerical simulation about the tectonic stress field analysis. Numerical simulation of the tectonic stress field conducted for the major mineralization stage of the Jiujiang-Ruichang junction area reveals that the stress field of the junction structure at the major mineralization stage shows a relatively close relationship with the formation of the ore deposits (occurrences).展开更多
In this paper,an improved Susceptible-Infected-Susceptible(SIS) epidemic spreading model is proposed in order to provide a theoretical method to analyze and predict the spreading of diseases.This model is based on the...In this paper,an improved Susceptible-Infected-Susceptible(SIS) epidemic spreading model is proposed in order to provide a theoretical method to analyze and predict the spreading of diseases.This model is based on the following ideas:in social networks,the contact probability between nodes is decided by their social distances and their active degrees.The contact probability of two indirectly connected nodes is decided by the shortest path between them.Theoretical analysis and simulation experiment were conducted to evaluate the performance of this improved model.Because the proposed model is independent of the network structure,simulation experiments were done in several kinds of networks,namely the ER network,the random regular network,the WS small world network,and the BA scale-free network,in order to study the influences of certain factors have on the epidemic spreading,such as the social contact active degree,the network structure,the average degree,etc.This improved model provides an idea for studying the spreading rule of computer virus,attitudes,fashion styles and public opinions in social networks.展开更多
This paper describes the design and implementation of HITASE, a general-purpose architecture Simulation Environment for evaluating performance of parallel machine architecture. This simulation environment is designed ...This paper describes the design and implementation of HITASE, a general-purpose architecture Simulation Environment for evaluating performance of parallel machine architecture. This simulation environment is designed for SPMD parallel machines and implemented by using program-driven methodology. Compared to other similar simulation systems, our simulation environment has strong generalities, and can study new architecture, such as a reconfigurable multistage interconnection network.展开更多
Herein we extract all the frequency-dependent coupling-of-modes (COM) parameters, which will be used to the rapid simulation and optimal design of surface acoustic wave (SAW) devices. FEM/BEM is used to calculate ...Herein we extract all the frequency-dependent coupling-of-modes (COM) parameters, which will be used to the rapid simulation and optimal design of surface acoustic wave (SAW) devices. FEM/BEM is used to calculate the exact field distributions of forward and backward surface acoustic waves within a finite-length periodic grating at every frequency. The middle compo- nent of the grating, regarded as a periodic structure, is selected to be investigated which can satisfy the presupposition of the COM model. From these field distributions, the values of P-matrix elements of one cell are calculated. The COM parameters taken as functions of frequency are accurately obtained. Specifically, the frequency-dependent relationships of reflection coefficient and propagation velocity are obtained independently. Using the resultant COM parameters, a one-port resonator on the substrate of 128°YX-LiNbO3 is simulated and the admittance curve shows good agreement with the simulating results using FEM/BEM. These results verify the validity and accuracy of this method.展开更多
文摘为了克服商业倒立摆存在通用性差,不便于改装升级,不利于新的控制算法探索和研究等问题,一种实时倒立摆系统被设计和实现。系统硬件采用PC机+运动控制器方式;软件采用Real-Time Windows Target方式,使用SIMULINKC MEX S函数在PC机上开发了设备驱动模块,并通驱动模块构成实时倒立摆控制系统。实验结果表明,该系统通用性能高,倒立摆系统的软件和硬件参数完全已知,无任何加密或者固化,便于改装和升级,也方便算法研究者进行算法设计和实现。
文摘The concept of fault junction is proposed to describe the relationship between the two faults by the authors. The junction relationship between Ganjiang and Tanlu faults is analyzed in this paper, and this has been elucidated through numerical simulation about the tectonic stress field analysis. Numerical simulation of the tectonic stress field conducted for the major mineralization stage of the Jiujiang-Ruichang junction area reveals that the stress field of the junction structure at the major mineralization stage shows a relatively close relationship with the formation of the ore deposits (occurrences).
基金supported by National Natural Science Foundation of China 61301091Shaanxi Province Science and Technology Project 2015GY015
文摘In this paper,an improved Susceptible-Infected-Susceptible(SIS) epidemic spreading model is proposed in order to provide a theoretical method to analyze and predict the spreading of diseases.This model is based on the following ideas:in social networks,the contact probability between nodes is decided by their social distances and their active degrees.The contact probability of two indirectly connected nodes is decided by the shortest path between them.Theoretical analysis and simulation experiment were conducted to evaluate the performance of this improved model.Because the proposed model is independent of the network structure,simulation experiments were done in several kinds of networks,namely the ER network,the random regular network,the WS small world network,and the BA scale-free network,in order to study the influences of certain factors have on the epidemic spreading,such as the social contact active degree,the network structure,the average degree,etc.This improved model provides an idea for studying the spreading rule of computer virus,attitudes,fashion styles and public opinions in social networks.
文摘This paper describes the design and implementation of HITASE, a general-purpose architecture Simulation Environment for evaluating performance of parallel machine architecture. This simulation environment is designed for SPMD parallel machines and implemented by using program-driven methodology. Compared to other similar simulation systems, our simulation environment has strong generalities, and can study new architecture, such as a reconfigurable multistage interconnection network.
基金supported by the National Natural Science Foundation of China(Grant Nos. 10774073 and 11174143)
文摘Herein we extract all the frequency-dependent coupling-of-modes (COM) parameters, which will be used to the rapid simulation and optimal design of surface acoustic wave (SAW) devices. FEM/BEM is used to calculate the exact field distributions of forward and backward surface acoustic waves within a finite-length periodic grating at every frequency. The middle compo- nent of the grating, regarded as a periodic structure, is selected to be investigated which can satisfy the presupposition of the COM model. From these field distributions, the values of P-matrix elements of one cell are calculated. The COM parameters taken as functions of frequency are accurately obtained. Specifically, the frequency-dependent relationships of reflection coefficient and propagation velocity are obtained independently. Using the resultant COM parameters, a one-port resonator on the substrate of 128°YX-LiNbO3 is simulated and the admittance curve shows good agreement with the simulating results using FEM/BEM. These results verify the validity and accuracy of this method.