场效应管夹断电压的作用及测试     

陈廷侠 《新乡师范高等专科学校学报》2004,18(2):19-21

根据夹断电压能确定可变电阻区与饱和区的分界点,使场效应管可靠地工作在饱和区的原理。研究了夹断电压的测试问题,介绍了测试场效应管夹断电压的方法,进而找出预夹断电压,由此即可确定场效应管的饱和区。  相似文献   

谈双电桥的灵敏度   总被引：1，自引：0，他引：1  

夏莉艳  张良  周薇 《伊犁师范学院学报》2006,(3):51-54

通过理论和实验两个方面,讨论了如何测量双电桥的灵敏度及影响双电桥灵敏度的因素.  相似文献   

英国超市消费现象分析及其启示     

宋涛 《新乡师范高等专科学校学报》2002,16(1):47-48

英国超市消费逐年增长 ,其经营方式更加灵活 ,销售领域更加广泛。中国是一个人口大国 ,随着居民收入水平的不断提高 ,消费水平也必然不断提高 ,如何使我国超市消费成为新的消费热点 ,引导超市经营向良性发展 ,我们可以透过英国超市消费现象 ,得到很好的启迪  相似文献   

基于VPN技术电力营销系统的设计与实现     

彭雅莉  黄金水 《湘南学院学报》2007,28(2):85-88

介绍了VPN的优势特点、安全技术,并以郴电国际汝城分公司为例,通过对电力信息网络的需求进行分析,提出了电力系统营销网络VPN的解决方案.  相似文献   

MICTS: Municipal ICT Schools – A Means for Bridging the Digital Divide Between Rural and Urban Communities     

Gjermund Hartviksen  Sigmund Akselsen  Arne Ketil Eidsvik 《Education and Information Technologies》2002,7(2):93-109

There is a substantial difference in use and development of information and communication technologies and services between and within countries. Some denote this phenomenon as the digital divide.This paper addresses the competence aspect of the digital divide. It proposes municipal ICT schools as one model aimed to bridge this gap and provides an assessment of the model based on the results from a field trial in three rural municipalities in Norway. The model brings the benefits of increased competence of ICT in the communities but in addition have a potential with regard to stimulating talent development, serving as a resource for local business and offering meeting places in the communities for building social capital. The model may be successfully implemented within reasonable economic limitations but is also challenging in several ways, for instance on how teaching resources are recruited and supported.The purpose of the paper is to bring forward the discussion about how to bring all people, also those in rural areas, to be participators in the information technology age.  相似文献   

Beta-Gamma函数对余元公式的推导与实现   总被引：1，自引：0，他引：1  

宋占奎  於全收  燕嬿  胡杰军 《陕西教育学院学报》2007,23(4):85-88

对构造的公式①,在复数域将其被积函数分解得2n个复根.在实数域将其实虚部积分取极限获证.对构造的公式②,由①将其被积函数的连续性、收敛性及一致收敛性与构造的有理数列用变量替换代入取极限获证.再由①与②应用Gamma-Beta函数的另一形式及(3),得到了余元公式的实现.  相似文献   

再论向量场X(v)=Av+f(v)v的极限环     

何永葱 《内江师范学院学报》2004,19(4):5-7

得到了向量场有极限环的必要条件是2×2矩阵A有复特征值,以及讨论了极限环存在和唯一的一些充分条件,这里f(v)也许是非齐次函数。  相似文献   

关于比较教育若干问题的再探讨     

谷贤林 《外国教育研究》2004,31(7):34-37

虽然比较教育作为一门学科,人们已经形成了共识。但关于比较教育仍有许多值得探讨的问题。文章就对“比较”的认识,比较教育是一门学科还是一个研究领域以及比较教育的特征进行了探讨。  相似文献   

静电场环路定理在静电场中的地位及应用     

孟彩荣 《忻州师范学院学报》2004,20(2):79-81

文章从静电场力作功的特点出发，说明静电场是保守力场。然后通过与高斯定理比较，阐述了静电场环路定理在静电场中的地位。并通过两个典型例子说明静电场环路定理的应用。  相似文献   

Entanglement of two-level atoms''''quantum states in a strong thermal radiation field     

ZHANG Deng-yu  XIE Li-jun  TANG Shi-qing  ZHAN Xiao-gui  GAO Feng 《商丘师范学院学报》2008,24(12)

The two-level atom is described by Pauli sign and environment is described by infinite harmonic particle thermal reservoir.We have studied the entanglement of two-level atoms which are put in the strongly thermal radiation field.The two-level atoms' reducible density rectangular array is obtained.We discuss the properties of entanglement by virtue of concurrence.It is shown that the two two-level atoms initially situated in different coherent superposition states,entanglement of atoms have obvious dissimilarity.  相似文献