轨检车检测数据处理分析软件关键业务研究

从业务模型的构建和关键业务分析两个方面对检测数据里程转换和波形图对比两项关键业务进行研究,构建了检测数据里程转换模型,进行了波形图绘制和波形图联动方法的研究,并对检测数据里程转换和波形图对比这两项关键业务的业务需求及业务流程图进行了分析与绘制,最终列出了两项关键业务的功能实现情况。研究轨检车检测数据处理分析软件的关键业务,从而更高效地运用软件分析与处理轨检车数据,为保证地铁线路的安全运营奠定基础。     

The human genome and understanding of common disease: present and future technologies

The study of candidate genes over the past three decades has yielded notable successes in common-disease genetics. During this time, however, interpretation of genetic association studies has been hampered by the use of clinical cohorts of inadequate power and insufficient information on genetic variation in candidate genes. The unavailability of highthroughput and low-cost genotyping technologies has also limited the scope of complex-disease genetic studies. More recently, however, the sequencing and characterization of variation within the human genome has revolutionized genetic studies and enabled full genome-wide scans for genes associated with disease. The identification of disease-associated (causative) genes has illuminated disease mechanisms. The translation of this knowledge into direct clinical benefit in diagnosis, prognosis and therapy for an individual’s disease still remains a challenge. Received 11 September 2006; received after revision 17 December 2006; accepted 18 January 2007     

零售商投贷联动融资的供应链契约结构分析

投贷联动融资是经济新常态背景下增强金融服务实体经济的能力和意愿的重要命题,选择合理的供应链契约结构则是促进金融资本与供应链深度融合及防范金融系统风险的重要措施.本文刻画了股权资本重构融资企业信用与产融结合的新特征,构建了零售商投贷联动融资下批发价(收益共享)契约模型,探讨了供应链契约结构的选择机制及对供应链运营效率改善空间.核心研究发现是投贷联动融资的供应链契约结构选择取决于交易成本降低(协同效益)与供应链协同成本的比较.此外,收益共享契约下投贷联动融资能协同供应链成员与金融机构实现帕累托改进,且存在贷款利率与努力成本扰动风险倒挂现象.     

Investigation of proportional link linkage clustering methods

Proportional link linkage (PLL) clustering methods are a parametric family of monotone invariant agglomerative hierarchical clustering methods. This family includes the single, minimedian, and complete linkage clustering methods as special cases; its members are used in psychological and ecological applications. Since the literature on clustering space distortion is oriented to quantitative input data, we adapt its basic concepts to input data with only ordinal significance and analyze the space distortion properties of PLL methods. To enable PLL methods to be used when the numbern of objects being clustered is large, we describe an efficient PLL algorithm that operates inO(n ² logn) time andO(n ²) space.This work was partially supported by the Natural Sciences and Engineering Research Council of Canada and by the Austrian Fonds zur Förderung der wissenschaftlichen Forschung.     

青海省工业战略性优势产业群决择

本文结合青海实际及工业发展现状,运用择定原则法,模糊综合评判法等定性定量方法,提出了青海工业应建立起以电力、高耗能、盐化工、畜产品加工和石油工业为主体的战略产业群,并通过产业链关联效应带动其它部门及整个青海经济的发展。     

飞剪机中连杆机构运动与动力学误差分析

根据机构弹性动力学理论和误差分布的思想，对飞剪机的连杆机构动力学变形建立了理论模型，对于给定的机构轨迹进行了四杆机构模拟，在此基础上，对该机构进一步进行了KED(kineto-elasto-dynamics)分析，模拟分析出了机构关键点的轨：迹点变形和变化规律．同时分析了机构参数出现误差后引起轨迹的误差分布。     

自动控制系统实例分析

文章分析了拜耳法原料磨自动控制系统的设计、安装、调试的整个过程，验证了该系统的可靠性与稳定性。     

空间机构运动误差的概率分析和蒙特卡罗模拟

本文研究由连杆参数公差和运动副间隙所产生的空间机构运动误差的随机性问题。通过引进“间隙特征要素”和“间隙空间”的概念,建立了常见运动副的随机模型,并作了概率分析。文中给出的间隙特征要素的独立变量的抽样公式,可用于对运动误差进行蒙特卡罗模拟,研究其统计特征和分布规律。     

计算机模拟连杆机构设计

本文提出用计算机模拟设计连杆机构来实现任意的连杆轨迹曲线。文中包括连杆机构的连杆曲线产生器,它可以作简单的连杆机构型综合和数字综合,并绘出连杆上任意点的轨迹曲线。由连杆曲线产生器可以选定机构尺寸的初值,然后用“SUMT”优化方法进行计算,并将计算结果输入前面说的连杆曲线产生器,画出曲线后与原曲线进行比较。如果两者相符则结果正确。否则可再选初值重新计算。文中有设计实例可供参考。     

新型六杆四面体扭网壳的构形、静力和稳定性能

提出了一种基于投影平面为四边形的六杆四面体单元组成的新型扭网壳(简称六杆四面体扭网壳),研讨了六杆四面体扭网壳结构的构形,它构造简单,节点和杆件数相对较少,网格抽空率高,兼有单层和双层网壳的优点.针对上、下弦节点为半刚接半铰接六杆四面体单块扭网壳作了静力和线性与非线性稳定性分析,结果表明上弦杆全部受压,下弦杆全部受拉,腹杆除周边一、二圈局部杆件受压外大部分也都受拉,各类杆件内力变化幅度很小,有利于杆件截面选配,提高材料的利用效率.结构的整体刚度好,结构的双非线性稳定系数对比于相应特征值屈曲系数降幅很小,用钢指标优越.这类网壳结构在两种网格抽空方式的单块扭网壳、三种形式的四块组合型扭网壳和一种两块组合型扭网壳中有推广应用的前景.