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°.     

Research advances of un-symmetric constitutive theory of anisotropic viscoelastic liquids and its hydrodynamic behavior

Research advances of un-symmetric constitutive equation of anisotropic fluid,influence of un-symmetric stress tensor on material functions,vibrational shear flow of the fluid with small amplitudes and rheology of anisotropic suspension were reported.A new concept of simple anisotropic fluid was introduced.On the basis of anisotropic principle,the simple fluid stress behaviour was described by velocity gradient tensor F and spin tensor W instead of velocity gradient tensor D in the classic Leslie-Ericksen continuum theory.Two relaxation times analyzing rheological nature of the fluid and using tensor analysis a general form of the constitutive equation of co-rotational type was introduced.More general model LCP-H for the fluid was developed.The unsymmetry of the shear stress was predicted by the present continuum theory for anisotropic viscoelastic fluid-LC polymer liquids.The influence of the relaxation times on material functions was specially studied.It is important to study the unsteady vibrational rotating flow with small amplitudes,as it is a best way to obtain knowledge of elasticity of the LC polymer,i.e.dynamic viscoelasticity.For the shear-unsymmetric stresses,two shear stresses were obtained thus two complex viscosities and two complex shear modulus(i.e.first and second one) were introduced by the constitutive equation which was defined by rotating shear rate introduced by author.For the two stability problems of fluid,such as stability of hydrodynamic flow and orientational motion,were discussed.The results show that the polymer suspension systems exhibit anisotropic character.The PNC systems can exhibit significant shear-thinning effects.For more concentrated polymer nano-suspensions,the first normal stress difference change from positive to negative,which is similar to LC polymer behavior.     

当前民办高校融资难的成因及对策

针对民办高校所需办学经费无国家财政拨款,全部为自筹资金的现状,分析了形成当前民办高校融资难的原因,既有信贷政策、银行方面的因素,也有民办高校自身的因素.提出民办高校要生存,要发展,光靠举办者投入或捐赠以及每年的学费收入是不够的,还需要积极拓展更多融资渠道解决办校融资难的问题.     

脉冲振动预磁器的研究和设计

根据细粒磁性物回收工艺中需要使用预磁器的要求,研究预磁器的工作时序、充放电回路的电器元件特性和电路电压、电流特征.设计的电磁预磁器磁场强度高,能耗低,性价比高.对预磁化电路展开理论计算和推导.首次提出脉冲振动预磁器系统结构,将RLC电路振荡波形转变为振动波形,形成"脉振"高场强,延长了线圈的使用寿命.经实际运行检验,该装置性能稳定,效果好,能耗低,每小时耗电仅0.8 kW,在预磁器领域是一项创新的实用技术.     

城市污水热能资源化的基础研究

作为城市污水热能资源化的基础研究,根据理论分析方法,对有效利用城市污水所赋存的热能时,其节能效果和对减轻大气污染的作用进行了若干分析和探讨.分别计算了流量为1 m3/s时城市污水赋存的热量,以及采暖面积为1万m2时所需的城市污水及赋存的热量,与空调、锅炉相比产生相同热量时的一次能和二次能的消减量,以及相应条件下的污染物年间(采暖期)消减量等.     

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.     

Vibrational shear flow of anisotropic viscoelastic fluid with small amplitudes

Using the constitutive equation of co-rotational derivative type for anisotropic viscoelastic fluid-liquid crystalline(LC),polymer liquids was developed.Two relaxation times are introduced in the equation:λn represents relaxation of the normal-symmetric stress components;λs represents relaxation of the shear-unsymmetric stress components.A vibrational rotating flow in gap between cylinders with small amplitudes is studied for the anisotropic viscoelastic fluid-liquid crystalline polymer.The time-dependent constitutive equation are linearized with respect to parameter of small amplitude.For the normal-symmetric part of stress tensor analytical expression of the shear stress is obtained by the constitutive equation.The complex viscosity,complex shear modulus,dynamic and imaginary viscosities,storage modulus and loss modulus are obtained for the normal-symmetric stress case which are defined by the common shear rate.For the shear-unsymmetric stress part,two shear stresses are obtained thus two complex viscosities and two complex shear modulus(i.e.first and second one) are given by the constitutive equation which are defined by rotating shear rate introduced by author.The dynamic and imaginary viscosities,storage modulus and loss modulus are given for each complex viscosities and complex shear modulus.Using the constituive equation the rotating flow with small amplitudes in gap between two coaxial cylinders is studied.     

玉米中转基因成分的定性PCR检测

利用改良 CTAB 法提取玉米产品的基因组 DNA,应用 PCR 检测方法,并以玉米特异性内源基因 IVR 为内参,花椰菜花叶病毒 35S 启动子(CaMV35S 启动子)、农杆茵胭脂碱合成酶终止子(NOS终止子)为靶基因检测玉米中是否存在转基因成分.实验结果表明,有些玉米样品中存在转基因成分,表明市场上存在未经标识的转基因玉米及其加工品.     

利用双折射晶体实现双偏振光叠加的教学研究

利用晶体的双折射现象和它的基本性质,采用现代光纤和CCD摄像放大技术手段研究了双偏振光的叠加和干涉现象,讨论了学生在教学中不易理解的难点问题.     

科技期刊版式设计略谈

对科技期刊版式设计中的标题、插图与空白的处置进行了分析探讨,认为科技期刊版式设计在总体上应是追求格式一致与节奏变化的统一,整体性与连贯性的统一.布局合理的版式设计带给期刊的是整体的和谐美,别具风格的版式设计标志着期刊的个性特征.     

语言规划视野中的公示语英译

语言规划(包括地位规划和本体规划)是人们有意识影响语言发展的活动.我国学者在此基础上提出语言功能规划,用以规划语言在社会生活中的功能.改革开放以后,我国许多城市公共场所公示语英译不标准、不规范,出现不少问题,成为语言规划新的研究领域.从语言功能规划角度,对公示语英译的规范和标准性问题进行了探讨.     

基于非确定性思考下的城市规划新思维探讨

通过对城市规划编制与实施过程中的问题分析,提出非确定性城市规划思想的理念以及非确定性规划思想与确定性规划思想的差别;并在分析非确定性规划思想的内涵的基础上,提出非确定性规划思想指导下的城市规划的新程式,探讨实现自下而上反馈的一个新方法.     

参与式发展理念在村庄规划中的应用

在我国社会主义新农村建设过程中,如何科学地编制村庄规划,促进村庄整治的顺利实施,是规划工作者面临的一道难题。当前村庄规划编制仍套用自上而下、政府主导的城市规划思维,导致实际的村庄规划实施效果并不理想。因此,通过调查不同地区村民了解、参与村庄规划的程度以及对规划内容的认知,将参与式发展理念引入村庄规划,从村民在村庄规划中参与方式、参与程序与参与内容等方面探索更为合理、完善的村庄规划编制模式。     

新时期区域综合规划中的“协调”问题初探——基于京津冀都市圈区域综合规划的思考

适应国家对区域规划日益重视的趋势,总结我国“十一五”规划区域规划项目———京津冀都市圈区域规划的编制经验,实证研究与理论研究相结合,认为“协调”是区域规划工作的精髓。阐明了区域规划应在三个阶段,即前期研究阶段、研究成果完成阶段以及规划初稿阶段进行协调;协调的对象包括各专业规划、高层次区域(空间)规划和地方规划等,即上、下、横向三个层次的规划;协调内容包括战略性内容如规划目标、规划内容尤其是探索性内容、具体项目与对策措施等方面,即从宏观战略到具体方案等不同层次的内容。     

新一轮漳平市城乡规划修编探研

针对漳平市当前处于大发展、大建设、大投资发展态势,提出了修编新一轮漳平市城乡规划思路。文章以＂跳出规划、认识规划,土洋结合、做好规划,一以贯之、实施规划＂为工作主轴,以＂集约与紧凑、生态与绿色、宜居与宜业＂为总体要求,以＂城乡统筹、区域协调＂为规划核心理念,以《城乡规划法》和新＂土地分类标准＂为规划主要依据,以期促进漳平市城乡规划从粗放向集约转型、从壮观向人性化转型、从城区向郊区转型。     

主动配电网多阶段规划

分析了主动配电网扩展规划的多阶段规划思想,提出了主动配电网多阶段扩展规划的二阶锥规划模型.模型以规划期内配电网社会总成本综合费用最小为目标函数,约束条件中除了考虑传统的设备建设安装约束、网络运行安全约束、主动管理约束外,还增加了阶段与阶段之间建设方案的约束.通过Portugal 54节点系统的算例分析和计算结果,验证了长期乃至远景电网发展规划宜采用多阶段规划.这样不仅可以保证各阶段规划方案满足负荷增长需求,而且可以大幅降低系统中的规划费用,提高规划方案的经济性.     

国土空间体系背景下基于GIS的村庄规划数据库建设研究

在新时代国土空间规划背景下,地理信息系统(GeographicInformationSystem,GIS)规划数据库已成为空间规划及数据库信息平台的重要组成部分,对三区三线划定等规划工作推进有着重要帮助.随着国土空间规划编制工作的推进,也逐步形成一套GIS数据库的编制标准及要求.本文从GIS数据库特点切入,通过研究GI...     

论城市文化对城市规划的影响

文章从城市文化本身入手,通过影响规划决策者的社会观而影响城市规划布局;通过影响规划师的价值观进而干预城市规划;通过影响公众个体的人生观间接对规划产生影响;制约规划决策制度而影响城市规划这4个方面,阐述了城市文化对城市规划的影响.     

城市规划与土地利用规划的关系研究

城市规划和土地利用规划是指导区域城镇建设和土地资源合理利用的重要规划,随着城市化进程的加快,两个规划之间的矛盾越来越突出。文章重点分析了两个规划之间的差异和联系,目的是为了消除对"两规"的一些模糊认识和误解,为促进"两规"的协调和社会可持续发展提供参考。     

论税收筹划的风险

针对现在税收筹划对企业的重要性,人们往往只认识到税收筹划的巨大利益,而对税收筹划风险估计不够,造成了纳税人经济、时间等的浪费,得不偿失。对税收筹划风险及其防范做了初步的探讨,阐述了税收筹划风险的概念及其表现形式,分析了税收筹划风险的产生原因,提出了＂最合理纳税＂的税收筹划目标,并着重探讨了税收筹划风险的防范措施。