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.     

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.     

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.     

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.     

单极世界军备竞赛微分方程稳定性的研究

对一国或多国军备竞赛的数学模型进行了研究.单独一国的经济增长服从Horrod-Domer模型,但当多国一起竞争时,弱国将遭受前所未有的严重挑战.通过研究超级大国、另一大国和弱国这三个国家之间军备竞赛稳定性问题,得到了军备竞赛稳定性的条件.     

Effect of sediment on vertical dynamic impedance of rock-socketed pile with large diameter

Based on the fictitious soil pile model, the effect of sediment on the vertical dynamic impedance of rock-socketed pile with large diameter was theoretically studied by means of Laplace transform technique and impedance function transfer method. Firstly, the sediment under rock-socketed pile was assumed to be fictitious soil pile with the same sectional area. The Rayleigh-Love rode model was used to simulate the rock-socketed pile and the fictitious soil pile with the consideration of the lateral inertial effect of large-diameter pile. The layered surrounding soils and bedrock were modeled by the plane strain model. Then, by virtue of the initial conditions and boundary conditions of the soil pile system, the analytical solution of the vertical dynamic impedance at the head of rock-socketed pile was derived for the arbitrary excitation acting on the pile head. Lastly, based on the presented analytical solution, the effect of sediment properties, bedrock property and lateral inertial effect on the vertical dynamic impedance at rock-socketed pile head were investigated in detail. It is shown that the sediment properties have significant effect on the vertical dynamic impedance at the rock-socketed pile head. The ability of soil-pile system to resist dynamic vertical deformation is weakened with the increase of sediment thickness, but amplified with the increase of shear wave velocity of sediment. The ability of soil pile system to resist dynamic vertical deformation is amplified with the bedrock property improving, but the ability of soil-pile system to resist vertical vibration is weakened with the improvement of bedrock property.     

加强专业建设 提高人才培养质量

专业建设是高等学校重要的教学基本建设,对高等学校的改革与发展具有深远影响。对我校专业建设中如何坚持特色与优势专业的建设、构建“大包装”专业群的经验进行了介绍,并就专业建设中应进一步加强的几个方面进行了探讨。     

人的主体性在道德内化中的作用

在社会转型中,由于利益的驱动和社会关系的调整,出现了道德约束乏力的现象,一些人对社会道德规范的认同感弱化,究其根源主要在于社会道德规范没有内化为人的内心自觉,而道德内化不力又源于人的主体意识的缺失。本文从人的主体性和道德内化的关系入手,提出发挥人的主体性是道德内化的关键,同时在道德内化过程中不断提升人的主体性。通过关注人的主体性,培养人的道德判断能力,把外在的道德规范内化为人的自觉需求,从而自愿地遵守社会道德规范。     

犯罪嫌疑人住处及下次作案地点预测

用正态分布概率密度函数叠加最大值法预测系列犯罪嫌疑人居住地点,建立了系列犯罪心理图像分析模型,给出了作案熟悉程度计算表达式和预测作案地点计算方法,定量分析了作案心理变化的4个阶段.对模型中影响熟悉程度的最大半径、安全距离区间和熟悉程度区间3个参数进行了灵敏度分析,以2010年国际数学建模B题(破案学)中PETER的犯罪足迹为例进行了预测,其预测正确率为80%.结果证明,该模型能够预测犯罪嫌疑人住处以及下一次作案地点,且具有良好的稳定性.     

加强专业建设提高人才培养质量

专业建设是高等学校重要的教学基本建设,对高等学校的改革与发展具有深远影响.对我校专业建设中如何坚持特色与优势专业的建设、构建"大包装"专业群的经验进行了介绍,并就专业建设中应进一步加强的几个方面进行了探讨.     

600MW汽轮机汽缸预暖系统的运行分析

汽轮机汽缸预暖系统是汽轮机节能降耗的一项有效措施。本文对某600 MW汽轮机汽缸预暖系统的运行条件和运行操作进行了分析,为进一步的优化运行分析做好技术基础。     

我国刑事诉讼法人性化问题完善之研究

法律天生就具备了人性化的属性。法律人性化作为一个备受社会关注的热点问题,与每个人的利益都息息相关。我国随着民主、人权和法治建设的深入,特别是新时期着眼于理性与全局的和谐社会的建构,人性和人性化在中国理所当然受到格外关注。我国刑事诉讼法是规范司法机关如何追究犯罪、惩治犯罪的程序法,从人性化视野来完善我国的刑事诉讼法就显得尤为重要。     

影响水泥强度检验结果准确性的诸多因素

通过对水泥强度检验误差进行综合分析,发现水泥强度检验结果的影响因素主要来自于仪器设备、试验条件和试验操作等方面,故而针对这些主要原因阐述了水泥强度的检测要求。     

生物柴油制备过程中混合体系的粘度测定及关联

在常压下采用NDJ-7旋转式粘度计测定了生物柴油制备过程中相关混合体系在288．15～365．15K下的粘度,包括大豆油和生物柴油,甲醇和甘油,甲醇、大豆油和生物柴油三个混合体系．结果表明：混合溶液的粘度均随温度升高而减小,并用最小二乘法分别对三个体系在不同温度下的粘度进行了关联,关联结果良好,可以用来计算不同组成和不同温度下这些混合体系的粘度．     

民国时期服饰西式化走向略述

从分析民国服饰变革原因着手,讨论了这次变革对中国服装走向西式化的重大影响.具体表现为:服装的等级制度彻底消亡;中国服装在中西服饰文化交融中得到了发展,诸如造型款式上从平面走向立体,服装材料从单纯走向丰富,穿着方式从纯中式走向中西结合;而且开创了我国时装表演的先河.