浅论发展烟草行业电子商务

随着知识经济的到来，信息的传递突破了地域性和时间性的局限，电子商务以惊人的发展速度和巨大的商业利益，吸引了国内外工商企业。电子商务在烟草行业处于起步阶段。本结合烟草的实际，分析了烟草行业发展电子商务的现状及意义，提出了发展烟草电子商务的基本设想。     

一类具有功能性反应的食饵——捕食者两种群模型的极限环存在性

本文研究了具有功能性反应的食饵———捕食者两种群模型:.x=x(a0-a1x1n)-c y xnn-1,.y=y(-d+e xnn-1),n=2,3,4…讨论了该系统的平衡点的性态,证明了极限环存在性.     

DVB-S2 inner receiver design for broadcasting mode

INTRODUCTION The second generation satellite digital video broadcasting standard (ETSI, 2004) has come out recently. Compared with the previous satellite stan-dard DVB-S (ETSI, 2003), DVB-S2 has more ad-vantages, such as the 30% increase in channel capac-ity, the more reliable performance, and the more ef-ficient usage of transponders. The DVB-S2 standard has been designed having in mind the peculiarities of the satellite channel, particularly the link fading im-pairments and the …     

发挥电视评论的"旗帜"作用

电视新闻评论比一般新闻报道更加具体,具有更强的指导性,是增强电视思想性和战斗力的必不可少的重要手段。在新形势下要进一步完善和发展电视评论的个性特征,更好地发挥其“旗帜”作用。     

"进出口业务"课程教学设计的探索与实践

本文总结了"进出口业务"课程的教学改革经验,对形成的以"培养应用型人才"为目的的进出口业务课程的教学设计进行了全面介绍与总结.     

基于信息技术的电子政务及对城市功能的影响

基于信息化背景下的电子政务使政府在办公方式、管理方式等方面发生了深刻变革.这种变革不仅发生在政府职能的转变上:由传统的政府管理模式转变为扁平化政府管理模式;而且对城市功能也产生了重要影响:产生了协作效应、替代效应、需求与服务积聚效应.     

Using Consulting for Teaching Elementary Statistics

Consulting in statistics is usually deferred until at least near the end of a first degree, but this article shows how some aspects can be effectively taught to students in upper secondary or early tertiary courses in a way which reinforces their learning of standard basic concepts. We suggest that the existence of a real client adds a degree of realism not available in other ways, and emphasizes to students the importance of blending statistical calculations with meaningful communication.     

关于田径教材中跑步技术原理某些理论问题的探讨

对于跑步技术提出了新的观点：基于两腿周期动作同时具有对应性、同步性和反方向性的特征，把单腿动作周期划分为折叠后摆、前摆、下压着地缓冲、后蹬四个阶段，有利于双腿动作协调配合的动力学特征分析．     

电子商务对企业竞争力的效应分析

电子商务作为全新的商务模式已成必然,它能够树立企业良好形象,增强成本竞争优势,创造新的市场机会,缩短产品生产周期,提高顾客满意程度,从而提升企业竞争力。     

Longest Paths and Cycles in Connected Claw-Free Graphs

A graph is called claw-free if it does not contain a claw as its induced subgraph. In this paper, we prove the following results : 1 ) If G is a 2-connected claw-free graph on n vertices, then for any vertex υ and any two distinct vertices x and y in V(G) - |υ| , G has a path containing v and all neighbors of v and connecting x and y;2) Let C be the longest cycle in a 3-connected claw-free graph G and H a component of G - C,and if H is connected but not 2-connected, then there exist nonadjacent vertices u and v in H such that |V(C)| ≥3(d(u) d(u)) -2.