基于网上便利店的B2C电子商务系统分析及设计

提出了一种基于网上便利店的新型电子商务系统模式 ,并对其开发技术进行了详细探讨。首先 ,本文阐述了常见的B2C电子商务系统模式 ,之后对网上便利店的可行性作了分析。最后 ,提出了基于网上便利店的新型B2C电子商务系统模式 ,给出了该类型电子商务系统应用环境及开发技术的选择方法。本文对B2C电子商务系统的研究探索值得类似电子商务系统开发分析借鉴     

亚夸克粒子的B分布、Γ分布和超对称性

 据实验、理论分析认为:在高能下F-D统计和B-E统计将统一被B分布或Γ分布替代.给出了价-海亚夸克混合模型中的B分布和Γ分布函数,与超对称的要求相符.讨论了轻子型夸克q’和其反粒子q’的复合粒子(q’,q’)是促成费米子和玻色子相互转变——超对称的中介,高能下泡利不相容原理可能被破坏或削弱.     

一个基于WWW的高校学生工作管理系统的设计

介绍运用ASP及数据库管理技术制作具有交互、远程控制功能的学生工作管理系统的方法，提出了系统的结构模型及功能模型。     

Hydrogen Production with High Evolution Rate and High Yield by Immobilized Cells of Hydrogen-producing Bacteria Strain B49 in a Column Reactor

To improve the hydrogen evolution rate in continuous hydrogen production of a novel fermentative hydrogen-producing bacteria strain B49 (AF481148 in EMBL), 4 % immobilized cells by polyvinyl alcohol-boric acid method, with the addition of a small amount of calcium alginate in a column reactor obtain hydrogen yield of 2.31 mol H2/mol glucose and hydrogen evolution rate of 1435.4 ml/L culture*h respectively at medium retention time of 2.0 h with a medium containing 10g glucose/L. Moreover, as the cell density in gel beads is increased to 8%, hydrogen yield and hydrogen evolution rate for 10g glucose/L are 2.34 mol H2/mol glucose and 2912.4 ml/L culture*h respectively at medium retention time of 1.0 h, and for molasses wastewater COD of 7505.9 mg/L hydrogen production potential of 205.6 ml/g COD and hydrogen evolution rate of 2057.7 ml/L culture*h at hydraulic retention time of 0.75 h are observed. In the continuous culture pH value keeps around 3.9 by self-regulating.     

Combinatorial Design of Some Database Application Technologies Based on B/S

Evolving From principal-subordinate structure of C /S to flexible multileveled distributed structure, i.e. B/S architecture so as to form a wide, distributed and orderly Internet/Intranet integrated management inf ormation system, is the trend of development of application software of the whol e world. Advantages and disadvantages of the two modes: C/S and B/S are compared . It is pointed out that at present onefold B/S mode cannot yet fully fullfil th e demands of some complicated data processing, inform...     

Candidate Multi-Peptide-Vaccine Against Classical Swine Fever Virus Induces Strong Antibody Response with Predefined Specificity

IntroductionClassical swine fever virus(CSFV) is a pestiviruswhich causes significantmortality and morbidity inpigs.An epidemic of CSFV in a high pig densityarea can result in devastating financial losses,because few infected pigs can be effectively cured.In many countries in Europe and Asia,classicalswine fever (CSF) is controlled by vaccinationwith commercially available vaccine strains,suchas the Chinese vaccine strain(C-strain,i.e.,hogcholera lapinized virus) orsome modified-live vir…     

并行数据库系统PAROⅡ连接算法

提出了并行数据库系统的哈希轮转（Hash-Round-Robin）数据划分方法以及其于该划分方法的并行记录分布B^n树，给出了基于该树的并行连接算法，分析了该算法的效率，这种连接算法充分利用了数据的已有分布及B^n树的特性，还利用了哈希轮转划分的特性，提高了并行连接的效率，该算法已经在自主研制的并行数据库管理系统PAROⅡ中得到实现。     

春秋日食考补遗

对“春秋日食三十七事”记载中有争议的三次日食再予考证。     

鸭胚B淋巴细胞中间纤维的研究

从26天北京鸭胚胎的腔上囊中分离B淋巴细胞。应用细胞选择性系列抽提方法与DGD包埋——去包埋剂的电镜制样技术相结合,显示出了B细胞的中间纤维的超微结构及分布特点:纤维致密交织呈网络状,其特点是均匀地遍布于整个胞质空间,纤维单丝直径在9—11nm。间接免疫荧光实验结果表明,B细胞的胞质对波形蛋白单抗呈阳性反应,且也显示出了波形纤维呈网络状的结构形式。本文采用单向电泳、双向电泳和蛋白质免疫印迹技术,证实了B细胞中间纤维波形蛋白的分子量约为55KD。