An Innovative On-Board Computer for Space Robot

In this paper an on-board computer system for the first Chinese Intelligent Space Robotic System was presented. A fault tolerance design on on-board computer （OBC） was proposed that allows commercial-off-the-shelf （COTS） devices to be incorporated into dual processing modules of on-board computer. The processing module is composed of 32-bit ARM RISC processor and other COTS devices. This innovative approach deeply relies on light weight/low cost equipment development using commercial miniaturized parts and non-space qualified technologies. As well as, a set of fault handling mechanisms was implemented in the computer system. The on-board software was organized around a set of processes that communicate between each other through a routing process. The qualification experiment shows that the fault tolerant on-board computer has excellent data processing capability and is enough to meet the demanding of the extremely tight constraints on mass, volume, power consumption and space environmental conditions.     

COLOR AC-PDP ENHANCEMENT OF LOW LEVELS IMAGE QUALITY WITH DYNAMIC MODIFYING SUB-FIELDS CODE

Based on the ＂Grayscales average distribution＂ method which equally distributes the input gray levels to output gray levels, three improved methods named： ＂Reduce the gray range expressed by the less significant subfields＂, ＂Low levels preset＂ and ＂Modify the exponent of inverse-gamma function＂ are proposed in this paper. Using these methods, the inverse-gamma relation subfields code can be obtained easily which can improve the low level expressions of AC-PDP. And a program, ＂ gray scales distribution validate program＂, which can enhance the expressions of the demanded gray levels range, is also proposed in this paper.     

浅谈砂石路养护的几个主要环节

介绍了砂石路养护的几个主要环节 ,即抓好养护备料、抓好早春养护、抓好道路翻浆的预防和控制、和抓好封冻前的工作。     

公路建设企业信息系统网络设计原则与方法研究

系统先进性：符合国际与国家最新标准，选用国际领先水平的主流品牌和符合发展趋势的产品。主机和网络系统有优良的性能，处理和传输能力上应留有充分的余量。应保证与各种主流的机型、网络和数据库的良好互联，以确保系统具有较长的生命期。软、硬件的投资要考虑到今后的发展，不能使用已经淘汰的产品或将要淘汰的产品，避免投资的浪费。     

碎石过渡层结构半刚性基层沥青路面参数的研究

分析了高等高级公路碎石过渡层半刚性基层沥青路面的特性及其病害的机理，提出了有关结构层合理的参数及材料要求等设计方法。     

软基处理表层土的稳定方法

软基处理的作业面较大,而表层土的强度又较小时,先行进行表层土的稳定施工,能确保施工机具及材料进场的顺利进行,工期及效益都比较显著,而后续软基处理效果也良好,本文介绍实践中的两例方案来说明表层土的稳定措施,在相对应的情况下,供同行参考.     

基于MIDAS多层结构的构建与开发

介绍了单层和多层数据库构建模式，重点介绍多层分布式应用的具体结构，在此基础上，分析得出多层结构的优势．介绍了实现多层分布式应用的技术MIDAS，讨论了怎样利用Delphi实现基于MIDAS的多层分布式数据库应用．以实例形式说明了利用Delphi建立多层应用的步骤，给出了应用实例的应用结果和部分应用界面．     

软基处理表层土的稳定方法

软基处理的作业面较大，而表层土的强度又较小时，先行进行表层土的稳定施工，能确保施工机具及材料进场的顺利进行，工期及效益都比较显著，而后续软基处理效果也良好，本文介绍实践中的两例方案来说明表层土的稳定措施，在相对应的情况下，供同行参考。     

上皮型钙粘附蛋白和层粘连蛋白在妊娠滋养细胞疾病中的表达及意义

目的探讨上皮型钙粘附蛋白(E-cad)和层粘连蛋白(LN)在妊娠滋养细胞疾病(GTD)中的表达及意义。方法应用免疫组织化学(SP法)检测74例GTD中E-cad和LN的表达情况。结果在GTD中,E-cad的正常表达率和LN强表达率分别为37.8%(28/74)和64.86%(48/74),显著低于正常绒毛组织。在葡萄胎(HM)、侵蚀性葡萄胎(IM)及绒毛膜癌(CC)中E-cad的正常表达率分别为53.3%、31.25%和16.67%;LN的强表达率分别为80%、56.25%和50%。随着GTD恶性程度的增加,E-cad的正常表达率及LN的强表达率逐渐降低,且与正常绒毛组织有显著差异。结论E-cad及LN的表达与GTD的发生、恶变及侵袭有关系;对E-cad与LN表达的监测有助于预测GTD的发展趋势及提示治疗效果。     

浅淡袋装砂井在软土路基的应用

采用袋装砂井处理软土路基,提高原路基的强度、承载力及侧向稳定性。