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.     

烽火七月唱红歌

五穷六绝七翻身,这句股谚确实很有道理,随着7月的到来,市场压抑已久的做多热情开始逐渐显露,无论是受益高CPI的农业,还是不断走强的保障房概念,或者超跌的次新中小板、创业板,都有资金积极做多。水泥、化工、煤炭、地产成了最近市场的四大天王。     

2009中国模特新面孔选拔大赛

我校08级学生李莹佳获得2009中国模特新面孔选拔大赛总决赛季军和最佳身材奖冰雪丽人情,相约哈尔滨,12月27日,2009中国模特新面孔选拔大赛总决赛之冰雪丽人培训营启动仪式在哈尔滨马迭尔宾馆举行,来自国内外的40个单位选送的44名     

欢迎赐稿 欢迎订阅

《江西理工大学学报》(以下简称《学报》),刊号:CN36-1289/TF,ISSN1007-1229,创刊于1980年,是江西理工大学主办的以自然科学为主的综合性学术刊物,国内外公开发行,双月刊。《学报》现为     

山东省人口和计划生育委员会：提高育龄群众对计生工作的满意度

我国的认证工作走过了20多年的历程，尤其是经过最近3年多的快速发展，业已在祖国建设的方方面面开花结果，在许多行业、许多岗位散发着阵阵芳香，乃至祖国的山山水水、名胜古迹的管理上都有它参与的身影。我们可以用一组组数据来反映认证在社会经济中发挥的作用，然而，一个个鲜活的获证实例更能生动地展示认证的功效和迷人风采，更能深刻地启示我们如何进一步做好这项利国利民的工作，于是，就有了这样一个新的专栏——《认证风采》。这个创意一经提出，即受到了业内知情人士的欢迎。第一期《认证风采》在方圆标志认证中心山东分中心的热情协助下，如期推出。此前，在本刊编辑前往组织稿件时，获证组织也积极响应。一位企业的认证工作者对编辑说：“认证给企业带来的好处是持续性的，是看得见摸得着的。我们也想把自己的做法告诉大家，互相交流。”《中国质量认证》一向以全面反映我国认证工作进程为己任，这个专栏也将同样伴随着认证的脚步走遍祖国大地，让我国认证工作者的辛勤努力在这里留下历史记录，让我国认证实践中的宝贵经验在这里汇总，让认证对国民经济和社会发展的贡献于这里展示。办好这样一个高品质的长期性专栏，离不开各方面的支持和关注，因而无论业内业外、组织或个人，我们都期待您的参与。     

房地产业与相关产业关联度分析

目的分析房地产业与相关产业的关联程度和排序，为制定合理的房地产业及相关产业发展政策和战略提供参考．方法运用灰色系统理论和方法建立灰色综合评判模型，并结合特尔菲法计算出房地产业与相关产业的关联度系数，对房地产业与相关产业的关联度进行定量分析．结果房地产业与建筑业关联度最大。关联系数为0．65．此外，房地产业与金融、保险业、制造业、电力、煤气及水的生产和供应业、社会服务业、交通运输、仓储及邮电通信业、批发和零售贸易、餐饮业等也有很高的关联度，其关联系数分别为0．51、0．48、0．47、0．41、0．33、0．30．结论房地产业是高关联度的产业，房地产业成为国民经济支柱产业是必然的．     

高校反腐倡廉的若干思考

中共中央颁布的《建立健全教育、制度、监督并重的惩治和预防腐败体系实施纲要》(以下简称《实施纲要》),是当前乃至今后一段时期内高校深入反腐倡廉工作的指导性文件.《实施纲要》的颁布,标志着我们党所领导的高校反腐倡廉工作进入了一个新阶段.本文拟就高等学校在新形势下如何贯彻《实施纲要》,科学构筑惩治和预防体系,深入进行反腐倡廉谈点肤浅看法.     

确保航天 面向社会 走向世界

本文全面地介绍了航天建筑设计研究院在航天工业总公司的正确领导下，在“改革、开放”方针指引下，贯彻确立“确保航天，面向社会，走向世界”的指导思想，向社会主义市场经济转变取得的巨大成绩和经验，提出了下一步全院改革开放的纵深奋斗目标。     

Application of particle trajectory model in 1D planar ejection

A simple one-dimensional planar model for ejection was set up based on experiments.And numerical simulation was performed on this model with particle trajectory model method.An Eulerian finite volume method was conducted to resolve gas field.And Lagrangian method was imposed to track each particle.The interaction between gas and particles was responded as source terms in governing equations which were induced by forces.The effects of total spraying mass,particle size and other factors on the mixture of particles and gas were investigated.The spatial distributions of particle mass and velocity at different time were presented.The result shows that the numerical results are qualitatively consistent to those of experiments.     

基于卫星图像数据的水稻预测模型实现高效灌溉，稳定全球市场

2007年底,全球粮食价格急剧上涨,到2008年,多种主要粮食的价格上涨至原来的两倍甚至三倍,一些发展中国家出现了严重的粮食危机,并由此引发多个国家发生民众抗议和骚乱。一些发达国家出现了抢购大米等食物的风潮,粮食危机有向世界蔓延之势。部分产粮大国也出现了恐慌,为控制这种情况,其停止了食品的出口。这又进一步加重了全球粮食危机,动荡和饥饿不断蔓延。     

Rheological property of low-damage,ideal packing,film-forming amphoteric/sulfonation polymer drilling fluids

Low-permeability dense reservoirs,including micro-fractured reservoirs,are commonly characterized by high content of clay substances,high original water saturation,high sensitivity to invasive fluids,high capillary pressure,complicated structure and anisotropic,high flow-resistance and micro pore throats etc,.Generally they also have lots of natural micro fractures,probably leading to stress sensibility.Main damaging factors in such reservoirs are water-sensibility and water-blocking caused by invasive fluids during drilling and production operations.Once damaged,formation permeability can rarely recovered.Numerous studies have shown that damaging extent of water-blocking ranges from 70% to 90%.Main damaging mechanisms and influencing factors of water-blocking were systematically analyzed.Also some feasible precaution or treating approaches of water-blocking were put forward.In a laboratory setting,a new multi-functional drilling fluid composed mainly of amphion polymer,sulfonation polymer,high effectively preventive water-blocking surfactants,ideal packing temporary bridging agents(TBA) and film-forming agents,etc.,were developed.New low-damage drilling fluids has many advantages,such as good rheological properties,excellent effectiveness of water-blocking prevention,good temporary plugging effect,low filtration and ultra-low permeability(API filtration≤5 mL,HTHP filtration≤10 mL,mud cake frictional coefficient≤0.14,permeability recovery>81%),can efficiently prevent or minimize damage,preserve natural formation and enhance comprehensive development-investment effect in TUHA Jurassic dense sandstone reservoir formation with low-permeability,the only one developing integrated condense gas field.Some references can be provided to similar reservoir formations.