Intact soft clay’s critical response to dynamic stress paths on different combinations of principal stress orientation

Comprehensive tests on Hangzhou intact soft clay were performed, which were used to obtain the soils’ critical response to undrained dynamic stress paths under different combinations of principal stress orientation. The different combinations included cyclic principal stress rotation (CPSR for short), cyclic shear with abrupt change of principal stress orientation (CAPSO for short) and cyclic shear with fixed principal stress orientation (CFPSO for short). On one side, under all these stress paths, samples have obvious strain inflection points and shear bands, and the excess pore water pressure is far from the level of initial effective confining pressure at failure. Stress paths of major principal stress orientation (α) alternating from negative and positive have quite different influence on soil’s properties with those in which α is kept negative or positive. On the other side, due to the soil’s strongly initial anisotropy, samples under double-amplitudes CPSR and CAPSO (or single-amplitude CPSR and CFPSO) have similar properties on dynamic shear strength and pore water pressure development tendency when α is kept within ±45°, while have quite different properties when α oversteps ±45°.     

解读连战先生的民族情

文章试图从两方面解读连战先生深厚的民族情.这种民族情一方面来源于他的家族,连战的先祖到台湾死也不臣服清,曾祖父至父亲三代以各种形式坚持抗日及父母对他言传身教;另一方面与他早年在祖国大陆的生活经历有关,从他对抗战和日本的态度及祖国大陆寻踪等方面体现出来.     

Evaluation of ultimate bearing capacity of Y-shaped vibro-pile

Based on Mindlin stress solution, a numerical computational method was proposed to calculate the stresses in the ground induced by side friction and the resistance of Y-shaped vibro-pile. The improved Terzaghi’s and ЪерезанцевВГ’s methods for ultimate bearing capacity evaluation were proposed by considering the stress strength induced by friction resistance at pile head level of Y-pile. A new method to calculate the ultimate bearing capacity of Y-pile was also proposed based on the assumptions of soil failure mode at the tip of Y-pile and the use of Mohr-Coulomb soil yield criterion and Vesic compressive correction coefficient with the induced stresses in the ground. Based on the comparisons with the field static load test results, it is found that the improved Terzaghi’s method gives higher ultimate capacity, while the other two methods shows good agreement with the field results.     

Adhesion coefficient of automobile tire and road surface

The adhesion coefficient of automobile tire and road surface was analyzed and the formula about it was derived.Some suggestions about highway construction,driving safety of the drivers and the judgment of the traffic accidents were presented.The results show that the adhesion coefficient is a function with the extreme value.If there is atmospheric pressure in the tire,the load of the vehicle and the degree of the coarse on the road surface is not selected properly,it will reach the least and affect the safety of the running automobile.     

Effects of stress conditions on rheological properties of granular soil in large triaxial rheology laboratory tests

In order to study the rheological properties of red stone granular soil,a series of rheological experiments were executed on large tri-axial rheological apparatus.Under 100,200 and 300 kPa confining stress conditions,the rheological tests were carried out.These experiment results showed that the stress conditions,especially the stress level were the critical influencing factors of the rheological deformation properties.Under the low stress level(S=0.1),the granular soil showed the elastic properties,and there was no obvious rheological deformation.Under the middle stress level(0.20.8) creep curves showed the non-linear viscous plastic rheological properties.Especially,under the stress level of S=1.0,the accelerated rheological phase of creep curves occurred at early time with a trend of failure.The stress level had obvious effects on the final rheological deformation of the soil sample,and the final rheological deformation increments nonlinearly increased with stress level.The final rheological deformation increment and step was little under low stress level,while it became large under high stress level,which showed the nonlinearly rheological properties of the granular soil.The confining pressure also had direct effects on final rheological deformation,and the final rheological deformation linearly increased with confining pressure increments.     

2008年我国房地产业的发展模式与市场把握

在深入市场调查、认真采集数据和科学分析研究的基础上,从我国新一年房地产业发展的"背景和环境"、"预期和责任"、"风险和影响"、"保障和创新"等方面进行阐述和论证.     

窃取商业秘密获得的专利权归商业秘密权利人所有——兼谈商业秘密构成要件和范围

中国加入WTO以后,知识产权的保护意识日益强化,作为知识产权范畴的专利权更是被人们普遍关注和重视.以"错案"为研究对象,运用商业秘密的有关理论以及保护商业秘密和专利权的有关法律制度,特别是从窃取商业秘密获得的专利权归谁所有的角度,对人民法院的判决进行了分析研究,指出了人民法院的判决是错误的,提出了窃取商业秘密获得的专利权归商业秘密权利人所有.这有利于人民法院公正司法,依法审判.     

从语气助词的角度浅析日语表达方式的特性

日语中有着十分丰富的语气助词,其虽然不具有实际的意义,然而通过语气助词,却能够流露出说话者的心情和感受,传递出不溢于言表的隐性含义,在日常的表达中扮演着十分重要的角色.从语气助词的角度,分析总结日语在表达上所具有的特性.     

Additional water use influencing strength and fluidity of recycled concrete

Through adding different additional water use,the compressive strength,splitting tensile strength and fluidity of recycled concrete of three aggregate combination forms were studied by experiment respectively.The experimental results show that with the increase of adding additional water use,the compressive strength and splitting tensile strength of recycled coarse aggregate concrete decrease,but that of recycled fine aggregate concrete and recycled all aggregate concrete increase firstly then decrease.When additional water use is added more 15% or 20% than that of basic ordinary concrete,the recycled coarse aggregate concrete and fine one can get pretty good fluidity.When it is added more 30%,the recycled all aggregate concrete has fluidity that is just satisfied.     

情趣与意象的契合——《逢雪宿芙蓉山主人》与《雪夜林边驻脚》之比较

通过分析《逢雪宿芙蓉山主人》与《雪夜林边驻脚》两诗的情趣和意象,发现两诗都采用了大致相似的意象.但由于诗人各自的文化传统的差异,在两诗中所传达的情趣却不同.然而,正是由于两诗各自在情趣与意象上的契合,才创造出了各自完美的诗境.     

质量体系审核专家系统

借助于计算机实现人类专家的\     

电力系统图模一体化系统的开发

电力系统图模一体化系统是电力系统分析、计算、设计、监控、管理等诸多应用系统实现图形可视化的基础.以Visual C 6.0为工具,以图形操作技术为基础、数据库为核心,完成了图模一体化系统,将绘图、分析计算与数据管理有机地合为一体,解决了长期以来3者分离的问题,为完整的电力图模一体化系统提供了一条可行的途径.     

学分制条件下本科生导师制的构建探讨

在学分制条件下实施本科生导师制,是当前大学生管理体制、育人体制改革一个重要突破口,是充分发挥学生个性的一种教育管理手段。文章主要探讨如何构建导师制,阐明了导师制在学分制管理制度下的重要性和导师制存在的问题,提出了推行和完善导师制的对策。     

立体车库PLC控制系统

介绍立体车库ＰＬＣ控制系统的组成及软件设计。     

专家系统工具C-ADVISOR的解释系统EXPLANATION

为了提高C—ADVISOR的实用性,我们设计了一个工具解释系统EXPLANATION。该解释系统采用预制文本法(prepared text)和执行追踪法(execution traces)对用户的提问给予解释,具有动态解释和静态解释两种功能。系统给出一种用户模型,能够针对用户的知识水平作出相应的解释。系统采用紧缩存贮技术,节省了大量的磁盘存贮空间。系统还设置一个数据库生成程序,为解释系统的建立、修改和维护提供方便的条件。     

基于嵌入式系统的智能数据采集系统

将 μC/OS Ⅱ实时嵌入式操作系统移植到高性能 1 6位单片机 80C1 96KC上 ,选用两片MAXIM公司八通道同步十四位A/D转换芯片MAX1 2 5构成实时高速十六通道同步数据采集系统。以IntelCHMOS高性能 1 6位单片机 80C1 96KC为核心 (MCU) ,并选用Lat tice公司可编程逻辑器件CPLD扩展 64路数字量采集和输出 ,数据采集系统可通过RS 485通信总线与其它系统建立通讯。该系统能广泛应用于电力系统、自动控制系统等对数据采集速度、精度、实时性要求高的场合 ,具有较强的应用价值。     

海军装备体制及其评估指标体系

阐述了装备体制及其评估的基本概念,分析了装备体制特性及评估要求,运用系统分析方法提出了建立海军装备体制评估指标体系的基本思路和分析步骤,形成了海军装备体制评估指标体系,并对其评估方法进行了初步探讨.     

主机入侵防御系统中系统访问控制

对Windows系统下的系统关键资源实施增强访问控制进行了研究,提出了一种能够对系统关键资源进行有效保护的系统访问控制方法,采用Windows驱动程序技术和核心级系统调用截获与控制技术,对文件、注册表、进程等关键资源实施增强的访问控制.经实验表明,在Windows主机上安装本系统,可有效提高系统的安全性,实现对文件、注册表、进程等系统关键资源的保护.     

DSS系统在ERP中的集成

通过对DSS系统和ERP系统的组成及结构分析 ,提出将DSS集成到ERP中及需注意的问题 ,并提出解决采用会话管理和数据仓库技术问题的办法 .     

学分制下构建虚拟班级的思考

提出构建虚拟班级的观点，在实施E-Class系统过程中，研究虚拟班级在新形势下对于班级管理的有效性，分析虚拟班级相对于传统班级的优势，提出构建虚拟班级应该重视以服务吸引学生、以内容教育学生这两个方面。