Function analysis of a semi-dwarf sdg in rice with near isogenic lines

The physiological phenotype of the rice semi-dwarf mutant,sdg,was characterized in details using a pair of near isogenic .Neither gibberellin*deficient nor gibberellin-insensitive is characteristic of the sdgphenotype.Byanalyzing the secretion of aamylas and the promotion of stem growth caused by eogenous gibberellin(GA),the sdg plant was found to have decreased sensitivity to the GA at the seedling stage. The dwarfism stature of the sdg mutant can be attributed to the shortened internodes. Increase of the cell sults indicate the protein encded by the wild type gene of sdg may be a regulator for cell elogation.     

Affinities and functional morphology of the Middle Cambrian ornamented tubules from West Hunan, China

Problematic phosphatic tubular microfossils with ornamented sculptures are documented to exist in limestones of the upper Middle Cambrian Huaqiao Formation at the Paibi section and the Wangcun section in West Hunan, China. Two morphological patterns, including Ornamented Tube Form I and Ornamented Tube Form II are described. Based on the analysis of the preservation, wall structure and composition of the fossils, it is deduced that these ornamented tubes may represent carapace spines of some Cambrian arthropods with phosphatic carapaces, such as bradoriid crustaceans. Analysis of functional morphology indicates that the sclerites may rather be considered of a defensive than grasping function on the original organism body.     

Comparison of metallogenesis and resource potential on the eastern margin of the Jiangnan Upheaval between south Anhui (Wannan) and northeast Jiangxi (Gandongbei) provinces

The southern and northern parts of the eastern margin of the Jiangnan Upheaval, located in the northeast of Jiangxi Province (Gandongbei) and the south of Anhui Province (Wannan) share many similar characteristics of basement composition and structural evolution. However, the two areas have very different metal endowments and ranges of deposit types. The aim of this paper is to compare the metallogenic conditions of the two areas in order to analyze the reasons for these differences and to estimate the preliminary resource potential of the studied areas. It is concluded that difference of the crust-mantle interactions, especially the Yanshanian magmatism in the two areas, is the main reason resulting in difference in the ore-forming processes between Wannan and Gandongbei. The resource potential of Gandongbei is significantly greater than that of Wannan.     

基于极效率DEA模型的港口绩效评价

对集装箱港口的绩效进行评价一直是港口当局关心的问题，现有文献尚未提出比较有效的方法，尝试利用极效率(super-efficiency)DEA模型对集装箱港口的绩效进行评价。极效率DEA模型能够有效地区别出有效(绩效值1)决策单元之间的绩效差异，可以对所评价的决策单元进行有效的排序。此方法已在城市和企业的评价中得到了应用，但尚未在港口得到应用。在案例中，汉堡港最有效率，新加坡港次之，然后是香港港、泽布勒赫港和基隆港，香港港由于船舶的无效逗留时间长、新加坡港集卡数配置不合理，导致两者的绩效低于吞吐量远小于它们的港口。     

基于dSPACE的卫星控制实时仿真系统设计

为满足某在研大型挠性卫星计算机在回路中的仿真需要,利用dSPACE多处理器系统设计了卫星姿态和轨道控制实时仿真系统。介绍了该系统的软、硬件构成。以星载计算机与惯性基准单元串口通信为例,重点介绍了采用RTI模块、Simulink和Stateflow,实现该实时系统的串口通信建模方法。在星上自主模式下,对该实时系统进行了实时仿真。仿真结果证明了设计的卫星姿态和轨道控制实时仿真系统和串口通信接口模型的有效性。此方法对dSPACE实时仿真系统在航空航天领域的工程应用具有参考价值。     

虚拟实验室中实验容器的建模

虚拟实验室必须有虚拟实验环境的支持。文中论述了虚拟实验室中常用容器的建模，并对一般的挤压造型方法作了改进。使用VRML中两个Extrusion节点分别对容器的内外壁进行造型，通过两次挤压造型，其模拟容器形体具有较好的真实感。     

基于LS-SVM的燃料电池控制建模的研究

由于直接甲醇燃料电池数学模型的复杂性难以满足工程上对DMFC控制系统的设计，提出一种基于最小二乘支持向量机建模算法，用具有RBF核函数的LS-SVM离线建立DMFC电堆的非线性模型；仿真和实验结果表明了该建模方法具有建模简单、模型精度高等优点，亦证明了该算法的有效性和优越性。研究结果对直接甲醇燃料电池控制系统的建模和控制具有一定的实用价值。     

采用遗传算法的中轨区域通信星座优化设计

区域通信星座的研究具有重要的现实意义，给出一种利用遗传算法设计中轨区域通信星座的方法。首先分析、确定中轨通信星座优化涉及的轨道控制参数，然后讨论了星座覆盖性能的评价准则，对星座系统的轨道控制参数集进行二进制编码后，利用遗传算法来获得对服务区具有最佳覆盖性能的星座类型。为了验证该方法的有效性，选择我国本土的一块区域，以最大覆盖率为目标进行仿真，结果表明该方法可以在给定条件下获得性能良好的星座方案。     

基于Ad Hoc网络的卫星通信系统建模与仿真

将Ad Hoc网络理论与卫星通信系统相结合，提出了基于Ad Hoc网络的卫星通信系统模型。并根据此模型，利用OPNET软件构建了系统仿真框架并进行仿真．同时对时延和吞吐率进行了分析，从而得出基于Ad Hoc网络的卫星通信系统所具有的利弊。     

通用雷达装备模拟训练系统及其关键技术研究

针对当前模拟训练系统功能单一、型号专用、开发效率低、水平参差不齐等问题，提出了基于PLSE（Product Line Software Engineering）理论的仿真平台概念、通用雷达装备全任务模拟训练系统概念和面向领域的研究方法。建立了外观模型、机理模型、人机交互模型、训练评估模型和系统结构模型的模拟训练系统模型体系，基于此提出了模拟训练系统的四种典型模式。攻克了全任务模拟训练系统研发中的四项关键技术：①提出并实现了面向维修案例的故障建模、仿真和评估方法；②采用USB（Universal Serial Bus）技术建立了基于实装专用部件的人机交互设备通用设计方法；③应用分布仿真高层体系结构HLA／RTI解决了模拟训练系统中的紧耦合交互问题；④建立了基于组件技术的模型规范和软件体系结构，实现组合式的仿真应用构建模式。最后介绍了针对通用雷达装备领域构建的仿真平台和一种虚拟式全任务模拟训练系统。