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.     

教学过程化监控管理系统的设计

针对高校网络课程教学中出现的问题,根据教育技术学的相关理论,如协作学习、情境学习等,提出了教学过程化监控管理系统的设计方案。通过该系统的监控、管理、评价和反馈功能的相互作用,来提升高校网络课程的利用率,提高学习者自主学习的兴趣和学习效率,进而提高高校的教学管理效率及教学质量。     

生产过程控制和管理集成系统概要

介绍集成系统发展的要求，建立了生产过程控制和管理集成系统的体系结构主要框架，为分析和设计这类集成系统奠定基础。     

徐州财富大厦空调系统设计

徐州财富大厦属要求较高的一类高层建筑,空调及通风、防排烟系统的设计施工较为复杂.在简要介绍该工程建筑概况及使用特点基础上,从设计参数、冷热负荷、冷热源、水系统、通风及防排烟、控制系统等方面阐述了该工程空调系统设计.     

信息管理系统设计方法的探讨

提出了在Win95/Win98操作系统下用Visual Basic5.0开发的一套具有自维护功能,易于结构扩展的数据库管理系统,可适用于高校及任何其它企事业单位的信息管理,该系统引进工具信息模型和仓库式管理组件思想,其即时安全检查和结构开放机制大大提高了管理系统的自适应性和稳定性。     

面向Agent的复杂软件系统分析

软件系统的复杂性,表现为系统结构的层次性、交互性和行为的不可预测性在此基础上,阐述了面向对象分析方法在解决复杂系统分析和设计时存在的不足,进而讨论了基于Agent的分析方法,并通过一个实例对其方法加以说明,基于Agent的分析方法能够较好地解决复杂系统空间分解等问题。     

银行的通用系统模型

以MIS的开发为背景,构造出银行的通用系统模型。通过对通用系统模型的要素进行分析,指出通用系统模型可作为一个合适的系统分析思考框架来使用。     

用于数控车床的嵌入式Linux文件系统的设计与实现

针对数控车床对系统功能、空间利用率、时间效率的需求,提出并实现了一种用于数控车床的嵌入式Linux文件系统。该系统以Cramfs为根文件系统,Yaffs作为用户的数据存储分区,用Tmpfs存储临时数据,采用Initramfs引导根文件系统。实验结果表明,系统的空间利用率高,启动时间快。     

我国高校进一步完善学分制之我见

学分制作为一种计量学生学习量的教学管理制度,现已被许多国家接受,并且不断完善和发展。本文立足我国高等教育,从学分制的特点和现实角度进行分析比较,提出了进一步完善学分制的一些具体做法。     

太阳系主要特征演化成因

以地面上运动物体要受到阻力及太阳系主要特征为据，提出物体有保持和恢复与周围物体相对静止的属性，运动物体产生一个企图恢复相对静止的力场（称为Ｕ场）．场强度与物体的动量成正比，与距离平方成反比，方向与物体的速度方向相同．通过Ｕ场的引入，可解释太阳系主要特征演化形成的原因     

用角放大率判定光学系统与光束性质

用两种光束入射，通过举例来说明，如何通过角放大率的大小和正负来判定光学系统和出射光束的性质。