Construction of a genetic map with SRAP markers and localization of the gene responsible for the first-flower-node trait in cucumber (Cucumis sativus L.)

With an F2 population from the cross of two cucumber inbred lines, S06 and S52, sequence-related amplified polymorphism (SRAP) was used to construct a genetic linkage map in cucumber (Cucumis sativus L.). Sixty-four SRAP primer combinations generated 108 polymorphic bands in the F2 population analysis. The average of polymorphic bands produced by one primer pair was 1.5, and the maximum was 5. Using Mapmaker 3.0, a linkage map was constructed, which consisted of 77 SRAP markers distributed in nine linkage groups (LOD≥3.0) and spanned 1114.2 cM with an average interval of 14.5 cM between markers. The gene for the first-flower-node trait, termed ffn, was mapped to linkage group Ⅸ, flanked by DC1EM5 and ME7EM2A at 10.3 cM and 12.1 cM distance, respectively.     

中国股票市场收益的长期记忆性研究

首先应用R/S分析法研究中国股票市场的长期记忆性，实证结果表明中国股市作为一个新兴的资本市场，表现了与国外发达股市不太一样的特征，即中国股市具有较明显的长期记忆生，又用既能描述短记忆又能表现长记忆的ARFIMA模型对中国股票市场进行建模研究，并证明该模型与其他模型相比较所体现的优越性。     

爱德华兹三级跳远技术的生物力学分析

通过intemet检索及MAT-shareware versionl．1a分析获取爱德华兹创造记录时的技术资料，从生物力学角度分析，探索现代三级跳远运动的技术发展趋势，认为：爱德华兹平衡技术好，腿部力量大，缓冲技术好，这些是创造佳绩的最关键因素。     

A complete sequence and comparative analysis of a SARS-associated virus(Isolate BJ01)

Severe Acute Respiratory Syndrome (SARS) is a newly identified infectious disease[1—5]. The global outbreak of SARS has been threatening the health of people worldwide and has killed 353 people and infected more than 5462 in 27 countries, as reported by WHO on April 29, 2003 (http://www.who.int/csr/sarscountry/en). Although it has been recognized that a variant of virus from the family of coronavirus might be the candidate pathogen of SARS[1—5], its identity as the unique pathogen sti…     

Some Properties of Fractals Generated by Linear Cellular Automata

Fractals and cellular automata are both significant areas of research in nonlinear analysis. This paper studies a class of fractals generated by cellular automata. The patterns produced by cellular automata give a special sequence of sets in Euclidean space. The corresponding limit set is shown to be a fractal and the dimension is independent of the choice of the finite initial seed. As opposed to previous works, the fractals here do not depend on the time parameter.     

氢氧化镁表面改性及其在LDPE中的应用

采用表面改性剂对氢氧化镁颗粒进行表面改性，探讨了表面改性剂种类、用量对氢氧化镁颗粒表面性质的影响．结果表明：当多磷酸酯的质量分数为1％时，氢氧化镁的物理性质趋于最佳．进而将改性氢氧化镁与聚乙烯共混，其拉伸强度明显提高．     

会计学专业实践性教学模式的探讨

知识经济时代 ,对会计人员的素质要求越来越高。文章主要探讨如何加强会计专业实践性教学环节 ,寻求有效的实践性教学模式 ,从而培养出具有熟练会计核算能力、利用会计资料进行会计监督、参与企业经营管理预测和决策能力的会计人才     

参数不确定广义系统的鲁棒H∞控制

研究了一类具参数不确定性广义系统的鲁棒H∞ 控制问题 .基于线性矩阵不等式 (LMI)方法 ,给出了控制输入为零时不确定广义系统具H∞ 范数界的稳定性分析 ;在此基础上 ,建立了鲁棒H∞ 状态反馈控制律的设计方法 .在一定条件下 ,该方法使不确定广义系统对所有容许的不确定参数 ,相应的闭环系统是正则、无脉冲且稳定的 ,并具H∞ 范数界 .数值例子验证了该设计方法的有效性     

基于H.323的数字化语音教室学生终端

设计了数字化语音教室学生终端的解决方案，分析了硬件双核结构的特点，结合CPU两个内核不同的体系结构，在DSP内核上连接A／D，D／A模块实现语音信号I／O通道以及实时实现语音编解码算法，在ARM内核上移植了μC／OS－Ⅱ嵌入式操作系统，H．323应用系统、键盘，显示器等用户接口模块均由μC／OS－Ⅱ统一管理和调度，语音终端综合应用了嵌入式软件设计技术，多媒体技术，计算机微处理器技术和网络技术，也可以作为Internet网络多革体终端的基础。     

基于喷墨打印技术的微小粒子发生器

在分析现代喷墨打印技术机理的基础上，研制了一台基于喷墨打印技术的微小粒子发生器。大量的实验结果表明，这种发生微小粒子的方法是简单可行的。