论电子商务的发展状况和趋势

信息化是二十一世纪的时代特征,作为信息经济的标志电子商务将会进入高速发展阶段。作为一种崭新的商务形式,电子商务已向传统的商务形式提出挑战,它的出现还将对企业的生产与管理,人们的工作与生活产生巨大影响。     

基于我国C2C网上交易者行为的风险防范研究

本文理论分析确定影响网上交易主客观风险程度的心理与行为因素,通过问卷调查和数据收集以及模型设计对此进行了验证.研究结果表明我国网上交易者存在认知和行为偏差,这导致主客观风险程度不一致性,其中交易信心、网站信任度、对卖家认知水平、对支付手段和网站服务质量以及政府监管的认知水平等因素对网上交易客观风险程度有显著影响,并借此提出了网上交易行为风险因素模型和防范机制,是对现代电子商务理论有益的补充.     

中国羽枝藻属新资料

 One new species Coloniophora shanxiensis Y. J. Ling et S. L. Xie, is described,and one new record, C. spicata (Schmid.) Islam, is reported both from shanxi, China.     

三种贝母核型的比较研究

The present paper deals with a comparative karyotypic study of three species in Fri-tillaria-F. thuncergii Miq., F. anhuiensis S.  . Chen et S. F. Yin and F. hupehensis Hsiao etK. C. Hsia.  The karyotype of F. anhuiensis S. C. Chen et S. F. Yin is first reported.      The karyotypes of the three species of Fritillaria are rather similar, all with K(2n)=24=2m+2sm+12t+4st+4m (SAT), showing a close interspecific relationship.  They all have twopairs of st chromosomes, one of which is the third chromosome in all the three species studied,but the other is the seventh in F. thunbergii Miq, the eighth in F. anhuiensis S. C. Chen et S. F.Yin, and the fifth in F. hupehensis Hsiao et K. C. Hsia.  It tells us that there are some differencesin their karyotypes.  All of the three species possess two pairs of satellite chromosomes with thesatellites located on the long arms. A heterochromatic zone is found sometimes on long arms of No.IX chromosome in each species of Fritillaria and on one of No. I chromosomes in both F. thun-bergii Miq. and F. anhuiensis S. C. Chen et S. F. Yin, a chromosome polymorphism occurringbetween populations of Fritillaria. In addition, three B chromosomes are always found in mostroot-tip cells of F. hupehensis Hsiao et K. C. Hsiao.     

中国金粟兰科植物拾遗

In the present paper the longstanding confusion of three uncertain spe-cies of Chloranthus, C. monostachys R. Br., C. pernyanus Solms-Laub. and C. kiangsien-sis Metcalf is clarified.  In addition to the new record of C. nervosus Coll. et Hemsl. tothe flora of China, the distributional ranges of Sarcandra hainanensis (Pei) Swamy etBailey and Hedyosmum orientale Merr. et Chun are also found to be much bigger thanpreviously known.     

基于Ti3C2Tx的柔性温度传感器的制备与应用

通过浸渍干燥法制备了可集成至纺织品中的基于Ti3C2Tx的可穿戴温度传感器。所制备的柔性温度传感材料显示出负的电阻温度系数,其值为-0.36%℃-1,能满足可穿戴温度传感器的要求。展示了柔性温度传感器对温水与冷水的感知能力,验证其在实际场景中的应用潜力。     

基于全球胜任力的C语言英文在线教学研究与实践

针对全球化时代的高等教育问题,分析基于全球胜任力的教学现状,根据教学实际问题,提出基于全球胜任力的教学目标,设计了C语言全英文课程在线教学体系。从全球胜任力的4个维度出发,介绍如何培养具备全球胜任力的领军人才。     

广义正则环

利用模类CR=M x∈M ,xR T =0 , T∈I ,给出了CR 有限生成模、CR 有限表示模、CR 正则环的概念 .研究了CR 正则环的判定条件及CR 正则环与CR FP内射模的关系 .