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.     

智能变电站电压无功综合控制

采用变电站电压无功综合控制的专家经验系统，以运行状态辨识及专家经验为知识库．按照“九区状态图”原则来控主变压器分接头开关的档位和补偿电容组开关的状态，以最少的动作次数使主变压器分接头档位和补偿电容组开关状态进入第九区，避免了困系统波动和负荷瞬间变化引起的主变压器分接头档位和无功补偿电容组开关频繁动作和振荡，保证了变压站电压无功综合控制系统的稳定运行，使变电站的输出电压和无功因素两个主要供电指标保持在合格范围内．     

外加剂对水泥净浆水化热的影响

采用直接测定法测试了矿物、化学外加剂对水泥净浆的水化热的影响，并对外加剂降低或提高水化物的原理作了一些探讨。结果表明，粉煤灰和矿渣等矿物外加剂能明显在降低水泥净浆的水化热和温升。FDN-5型减水剂、糖密缓凝剂等化学外加剂能不同程度地降低水泥净浆的水化热和温升，推迟热峰出现时间。Na2SO4早强剂会提高水化热和温升，且使热峰出现时间提前。松香引气剂对水化热和温升影响不明显。     

油气设备诊断序列统计的应用(英文)

给出了振动信号的统计特性 ,即GCU低压汽轮机振动仪上收到的时间和频率线等级标准。油气设备诊断中等级标准的应用 ,可本质上去除专家估计的主观性 ,在传统时线分析方法中是不可缺少的 ,并可对设备的技术条件、可操作模型的定义加入定量的标准。     

掺气分流墩墩头的动水压强特性研究

对掺气分流墩墩头的动水压强特性进行了试验研究 ,以求了解墩头的抗空蚀性能及动水压强特性 .试验结果得出 :时均压强P/Pmax沿墩高和时均压强系数Cp 沿横断面的分布规律 ;墩头轴线与来流有夹角时Cp 沿横断面的分布规律 ;墩头壁压脉动压强特性以及探讨了柘林掺气分流墩 (墩头的θ =75°)的安全使用范围 ;在墩后充分供气时 ,墩头的空化特性 .     

科技写作教学评价问题刍议

科技写作教学是科技写作学科建设与发展的两大分支方向之一，科技写作教学评价研究是实现科技写作教学科学化的重要途径。本文借鉴教育评价的理论与方法，探讨了科技写作教学评价的特点与功能；并针对科技写作教学实践中存在的问题，具体分析了教学评价研究的对象及特定的评价内容。     

蜂窝梁的挠度影响因素分析

对蜂窝梁的扩张比,孔的类型,蜂窝梁的高跨比和剪跨比四个因素对挠度的影响进行分析比较,并与等截面实腹式梁的挠度进行对比,得出蜂窝梁的扩张比,高跨比对挠度影响较大,并指出蜂窝梁扩张比的合适范围及挠度扩大系数α值的变化规律.     

提单的法律性质

关于提单的法律性质，中外学者观点不一。笔者试图论证提单具有物权性的观点．为此，首先给出了提单的含义，并详细论述了提单的法律特征：1、提单是海上货物运输合同的证明；2、提单是承运人接收货物的收据；3、提单是承运人保证据以交付货物的单证。然后对提单的法律性质即物权性进行了探讨，并采用历史分析结合现实需要的方法总结出提单具有物权性的三个原因：1，提单物权性的产生具有历史合理性；2，提单具有物权性符合现实商业的需求；3，提单的可转让性决定了提单具有物权性。另外，文章强调了提单的物权性是受到一定条件限制的。     

加强公益事业建设实现城市可持续发展

就公益事业优先在城市规划实践的不足与展望、提高公益事业在城市规划中的地位、公益事业优先在城市规划中的体现、公益事业优先必须做到规划以人为本、公益事业优先的目标是城市的可持续发展等方面提出几点理性的思考.     

谈社会主义制度和资本主义制度的本质区别

社会主义和资本主义两种制度的本质区别在于生产资料所有制形式不同。生产资料所有制的性质决定社会的性质。资本主义的基础是私有制,资本家占有生产资料,少数人致富。社会主义的基础是公有制,人民当家作主,共同致富。两种制度有本质区别同时又有联系。     

大型超市防火疏散设计探讨

随着经济的发展和零售商业经营模式的转变,全国各大城市陆续建起了许多大型、特大型的超市建筑,给建筑防火设计提出了新的课题.1大型超市建筑的特点1.1层数不多,体量很大大型超市建筑以2、3层居多,属于多层建筑,个别属于高层建筑.这类建筑物占地面积很大,一般都在上万平方米,建