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.     

学分互认下的电力行业校企继续教育探析

基于学分制的电力专业继续教育要求构建出多样化的人才培养模式。如何有效地将电力企业员工从不同渠道获得的学分与高校专业学习学分要求进行联系,建立起互联互通的“立交桥”是当前亟待解决的问题。文章针对目前电力校企间学分互认的发展、互换模式的建立及存在的问题进行了探讨和思考。     

电力安全警示教育室在电力安全培训中的应用

安全警示教育为安全培训提供了新的思路,电力安全警示教育实训室逐渐成为了电力安全培训的有效载体。为充分发挥安全警示教育实训室的功能,使得安全培训更加高效,文章主要讨论了安全警示教育室的培训管理体系、培训内容与形式、培训效果评估三个方面。经实践证明,电力安全警示教育室为安全生产提供了有力支撑。     

不同原理的SF6混合气体密度监测技术差异分析

SF_6或SF_6/N2混合绝缘气体的密度直接决定着气体的绝缘性能,因此对气体密度的监测尤为重要。SF_6混合绝缘气体被认为是短期内最具发展前景的SF_6替代介质,国家电网公司目前正大力推广GIS母线用SF_6/N_2混合绝缘气体的应用。由于SF_6混合绝缘气体具有新的特性,原有的SF_6气体密度继电器无法反映设备内SF_6混合绝缘气体密度,为此,亟需开发SF_6混合绝缘气体的密度监测装置。文章对比分析了两种不同原理的SF_6/N_2混合绝缘气体密度监测技术,并探讨了具备混合比监测功能的SF_6/N_2混合绝缘气体密度监测技术。     

拓展青年岗位建功品牌内涵的探索与实践

新时代向国有企业共青团工作提出了新的挑战,国网安徽省电力有限公司团委坚持聚焦主责主业,把牢围绕中心、服务大局工作主线,找准共青团和青年工作的切入点和着力点,在有效组织带领青年服务大局、拓展青年岗位建功品牌的内涵等方面进行了探索实践,总结了相对完善的工作方法,形成了具有特色的青年岗位建功品牌“一团一工程”,彰显新时代国有企业共青团的定位和价值。     

2018年1月安徽电网输电线路覆冰舞动故障规律分析

对2018年1月安徽电网出现的大面积输电线路覆冰舞动故障和设备受损规律进行了分析,结合气象资料和线路结构参数,对输电线路舞动形成的原因进行分析。结果表明线路跳闸主要原因为持续冻雨和大风激励下,线路发生舞动,引起相间或导线对地线距离不足放电;设备受损主要原因为长时间的导线舞动造成直线塔绝缘子球头疲劳破坏后断裂,引发导线掉落,以及耐张塔长时间承受动态不平衡张力而损坏。故障分析结论对安徽电网舞动防治具有重要意义。     

移动式模拟主站在新设备接入电网联调验收过程中的应用

针对新建、改(扩)建变电站投运前受通信条件制约,监控、自动化联调工作量大、时间紧、人员投入大、安全风险高等不利影响,提出了在电网监控信息^[1]验收过程中应用移动式模拟主站,为厂站全新设备的投入运行联调、验收提供了技术基础。在通道^[2]未通时,移动式模拟主站不再依赖变电站及主站的通信,提前实现对变电站端及调度主站分别进行调测,提前发现问题并消除缺陷。同时构建基于网调、省调、地调平台监控信息智能调测系统,链路建立之后,实现主、子站全自动正式联调。通过对移动式模拟主站的应用,实现了传统联调调测模式到一体化联调调测模式的转变与技术革新,提升了变电站监控、自动化联调、验收管理水平。     

输电线路交叉跨越隐患防治管理探析

随着经济社会的发展,输电线路与外部电网、铁路、高速公路交叉跨越情况更加复杂。为掌握线路通道内的交叉跨越隐患,通过现场勘查、资料采集、照片收录等有效措施,对所辖线路内跨越公路线、铁路线、高危鱼塘等重要跨越、交叉跨越及对地距离较低等隐患进行排查,从交跨类型、交跨角度、交跨测量距离和跨越安全距离等方面进行详细统计,建立输电线路交叉跨越档案,超前管控,提升线路运行质量,确保电网运行安全优质。     

新型GIS用SF6密度在线监测装置研究

GIS气室内SF_6密度监测,容易受环境、产品设计及运维等方面的影响,存在监测不准确及故障气体无法有效获取问题。本研究设计了一种模拟试验装置,为GIS密度的精确计量提供技术参数支撑;设计一种新型GIS用SF_6密度在线监测装置,实现SF_6密度、压力及分解产物动态监测监控,为故障趋势预测提供有效数据。     

基于TLS-ESPRIT电力信号扰动分析方法的研究

针对电压扰动及其存在的问题,文章将TLS-ESPRIT方法应用于电力信号干扰分析。该方法结合总体最小二乘法和子空间旋转不变性实现了电力信号扰动的检测,通过仿真分析证明该算法精确有效,实现过程简单,运算量小。通过对实际数据的分析证明了该算法的可行性,在实际电力信号干扰处理中具有应用前景。     

光伏电站水消防和生活污水处理方案的优化设计

文章根据光伏电站火灾危险性等级,通过控制单栋建筑物规模,实现取消水消防,并根据不同构筑物的火灾类别有针对性地采取相应的消防措施。许多光伏电站建设了地埋式一体化生活污水处理装置,但实际运行效果不理想。建议在干旱地区采用沉淀池和蒸发池,并考虑低温或阴雨季的调蓄容积;非干旱地区采用包括厌氧—兼氧—好氧工艺的生物塘处理工艺,可以利用当地的土石类建筑材料和当地优势种群的水生物处理污水。这样的设计方案具有建设和运行费用低、审批简单、实际运行效果好的优点,适于在光伏电站中推广使用。