Design and application of 60mer oligonucleotide microarray in SARS coronavirus detection

In April 2003, a novel coronavirus[1,2] which was associated with cases of Severe Acute Respiratory Syn-drome (SARS) was first isolated and sequenced in Canada. The genome of SARS coronavirus (SARS-CoV) is 29727[3] nucleotides in length and has 11 known open reading frames (ORFs). Although the genome organiza-tion of this virus is similar to that of other coronaviruses, phylogenetic analyses and sequence alignment show that SARS-CoV is not closely related to any of the previously ch…     

The age of formation of the mirabilite and sand wedges in the Hexi Corridor and their paleoclimatic interpretation

The Hexi Corridor is located at the transition zone of the Asian summer monsoon and westerly airflow, and lies in an important position in terms of its ecological fragility and climatic sensitivity. During a recent field expedition to this region, we found a sedimentary mirabilite layer in a number of localities including Suwushan, Yanchi, Baitujing, Yanchi Gaotai, Huahai, Yumen, Halanuo扙r, and Dunhuang (Fig. 1), which have the potential to provide important information about environmenta…     

Loess-soil sequences in southern Anhui Province： Magnetostratigraphy and paleoclimatic significance

Two parallel loess-soil sequences from Xuancheng and Fanchang in southern Anhui Provinces are dated using geomagnetic and luminescence methods.The Brunhes/Matuyama(B/M) reversal boundary is recognized within the lower part of the so-calles Vermiculated Red Soil (VRS) in the Xuancheng section while the entire Fanchang sequence is of Brunhes age.This indicated that the most recent VRS in southern China,a stratigraphic marker and an indication of extremely warm-humid conditions,was formed during the middle Pleistocene,chronologically correlative with the S4 and S5 soil units in northern China.Microscopic and sedimentologic in vestigations reveal that eolian deposition started in this region at about 0.85 MaBp,roughly synchronous with the well-known Mid-Pleistocene climate change of global significance.The strengthening of both summer and winter monsoon circulations and the consequent river hydrological changes at that time would have provided favorable conditions for sustained eolian deposition in the middle-lower reaches of the Yangtze River since 0.85 MaBP.     

无剪切闭锁的厚薄板矩形单元的构造

在板弯曲的有限元计算中 ,因为剪切闭锁现象导致厚板元无法自动退化为薄板元 ,工程中很难构造既适用于厚板又适用于薄板的计算单元 ,因此采用由龙驭球教授提出的广义协调元法 ,构造了矩形厚薄板弯曲通用计算单元 .通过铁木辛柯梁理论 ,建立了板单元边界和板单元内部的位移插值场函数 .计算结果表明该单元可顺利解决剪切闭锁现象 ,可在实际工程中推广应用     

基于B/S的客户关系管理系统的设计与实现

客户关系管理系统通过对客户详细资料的深入分析来提高客户满意程度，提高企业的竞争力，是现代企业的竞争法宝．文章以SuniAIR集团公司的客户关系管理系统开发为背景。提出了基于B／S模式的客户关系管理系统。研究并设计了其体系结构。详细介绍了其主要模块功能．该系统运行效果良好，取得了预期效果．     

基于离散智能的自重构机器人变形策略

在总结自重构机器人系统结构本质特点的基础上，提出了一种描述模型，对几种典型的同构和非同构系统进行统一的描述．探索了自重构机器人的基本变形方法，给出一种建立在全离散的局部智能基础上的变形策略，使机器人通过模块局部之间的交互产生整体自组织的结果，并且能够减低变形算法的计算复杂度．以一个9模块系统的变形过程为例进行了验证．     

螺杆冷水机组稳态仿真

为预测螺杆冷水机组在大范围结构参数以及运行工况下的性能 ,提出了该类相应的稳态仿真模型 .模型由一系列部件模型组成 ,包括压缩机、经济器、膨胀阀、壳管式冷凝器以及满液式蒸发器 .结合顺序模块方法和连续替代方法实现了模型的求解 .模型预测结果与不同规格的 4台不带经济器冷水机组和 3台带经济器冷水机组的实验数据相比 ,误差在± 1 0 %以内 .通过模型验证发现 ,只有当压缩机一级内压缩容积比大于一定值时 ,机组才能获得高于其不带经济器时的 COP     

无关供者骨髓移植治疗多次复发性急性白血病

文章探讨无关供者骨髓移植治疗多次复发急性白血病的疗效 .经改良 Bucy方案预处理后对一例第三次复发的急粒患者行无关供者骨髓移植 ,同时给防治 GVHD、抗感染治疗 .结果 + 2 1天骨髓在患者体内植活 ,+ 35天细胞染色体分析呈供者型 ( 4 6,XX.正常核型 ) ,+ 84天血型转换成供者型 ,至今已无病生存超过 6个月 .结果表明 ,无关供者骨髓移植对多次复发的急性白血病患者具有治疗价值     

中国农产品显示比较优势降税模型

根据比较优势理论，竞争优势理论建立了中国农产品的静态和动态显示比较优势降税模型。讨论了模型解的存在性。     

空间矢量PWM算法及波形分析

对空间矢量PWM算法进行了分析，提出了比较直观且适于操作的具体计算公式。同时，从中央处理器DSP功能模块易于实现的目的出发，进一步转化为用时间常数表达的形式。最后，通过对不同调制比下的PWM波形品质进行对比，得出调制比为奇数或偶数不是唯一影响波形质量因素的结论。