通讯机构：
[Xu, Piao-Rong] C;Cent South Univ Forestry & Technol, Coll Comp & Informat Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
The European Physical Journal Applied Physics;journal;EPJ;EDP Sciences
摘要：
A numerical model of carrier saturation velocity and drain current for the monolayer graphene field effect transistors (GFETs) is proposed by considering the exponential distribution of potential fluctuations in disordered graphene system. The carrier saturation velocity of GFET is investigated by the two-region model, and it is found to be affected not only by the carrier density, but also by the graphene disorder. The numerical solutions of the carrier density and carrier saturation velocity in the disordered GFETs yield clear and physical-based results. The simulated results of the drain current model show good consistency with the reported experimental data.
关键词：
prefabricated defects polymer material;pyromagnetic effect;integrated measurement system
摘要：
There exist multi-field coupling effect in prefabricated defects polymer materials under loading. For understanding the pyromagnetic effect, it is crucial to accurately measure the coupling relations of the key physical quantities about displacement, tensile load, temperature, and magnetic field. To overcome the obstacle in current measurement systems for synchronized measurement, an integrated measurement system for multi-field coupling detection is presented to enable synchronized, automatic detection. This paper introduces the system structure, software design, and the detailed design of varied-speed PID control methods. Test results show that, the system is effective for valid data acquisition for displacement, tension load, temperature and magnetic field of a high polymer Polyvinyl Chloride (PVC) plate sample under constant tensile load, and all test data can be visualized on the software interface. This system provides a good test platform for further research on pyromagnetic effect of PVC plate.
摘要：
CAN(Control er AreaNetwork)结构简单,规模适中,通信具有突出的可靠性、实时性和灵活性.得到越来越广泛的的应用.本文讨论了采用嵌入式WinCE与LPC935单片机构成的CAN通信问题,认真分析了WinCE操作系统与LPC935单片机CAN模块特性,设计出了进行CAN通信的总体框图,针对实际CAN通信存在的问题定制了CAN通信协议,根据该系统硬件要求,定制了WinCE系统内核,最后实现了CAN通信设计.
作者机构：
[Zhang Yong-zhong] Cent S Univ Forestry & Technol, Coll Elect & Informat Engn, Changsha 410004, Hunan, Peoples R China.;[Luo Ying-she; Zhang Liang; Yang Zhan-yu; Ma Min-wei] Cent S Univ Forestry & Technol, Inst Rheol Mech & Mat Engn, Changsha 410004, Hunan, Peoples R China.;[Su Jian-xin] Xiangtan Univ, Coll Informat Engn, Xiangtan 411105, Peoples R China.
通讯机构：
[Zhang Yong-zhong] C;Cent S Univ Forestry & Technol, Coll Elect & Informat Engn, Changsha 410004, Hunan, Peoples R China.
会议名称：
The 9th National Conference on Rheology
会议时间：
2008-01-01
会议地点：
中国湖南长沙
会议论文集名称：
Proceedings of the 9th National Conference on Rheology
关键词：
C language;Experiment system;Global magnetic field;High polymer;LabWindows/CVI;Measurement system;Measuring systems;Pyromagnetic effect;Temperature compensation;Weak magnetic fields;Magnetic field measurement;Magnetic fields;Measurements;Sensor arrays;Signal processing;Magnetic materials
摘要：
The measurement system is the main equipment of the project. Based on the characteristic of experiment system, a sensor array is designed, and used to continually acquire the global magnetic field. A scientific scheme is developed to get the signal processing and temperature compensation for nondirective weak magnetic field. The software of sampling control system is given, which is complied using C language in Labwindows/CVI. Taking computer as main engine, the system can acquire the nondirective weak magnetic field automatically and continuously use the sensor array, the change of magnetic field can be shown in real-time and intuitively.
摘要：
Thermomechanical coupling of PVC sheet with defects under uniaxial loading at different rates and different sizes of microbores was studied. The local temperature field of the dynamic damage-rupture process zone at crack tip was surveyed with infrared thermographic sensor. Based on the irreversible thermomechanics theory, the dissipation law of deformation-heat effect during the whole process was found. Furthermore, the effect of thermoelasticity in the initial stage of extension was explained.
