(2+1)维KD方程组的一类非亚纯行波解

通过行波变换将(2+1)维KD方程组转变为复域中的常微分方程,给出复合的(2+1)维KD方程组2(wk-3l2+3ak2 C1)u=2k4 u″-k2 a2 u3+(6k2b-3kal)u2+C2,v=lku+C1的一类非亚纯解的结构.     

浅谈沿黄河一级公路公路涵洞台背等载预压处理技术

通过对西北湿陷性黄土地区一级沿黄河公路涵洞台后变形及不均匀沉降产生的原因分析,指出了高水位下构造物台北处理的重要性,并针对性地提出处理方法和思路。     

一类特殊根及其刻划

研究了任一个超幂零根为零的亚直不可约环所确定的环类 ,证明了由这样的环类所确定的上根都是特殊根 ,并且给出了这类根的一些刻划     

关于特征函数T(r,f)与T(r,1/f)的关系

本文研究亚纯函数f(z)与1/f(z)的特征函数T(r,f)与T(r,1/f)之间的关系。由Jensen公式推导出了它们的关系式,从而证明了特征函数T(r,f)与T(r,1/f)之间只相差一个常数。     

浅谈医疗机构的亚专业分化管理

亚专业分化的学科建设策略，是一项新的学科和人才管理办法。贯彻了激励原则，体现了专业技术科学分类。创新了人事管理的方法。为医院的发展储备了一批高水平的人才。提升了专业技术水准，在学科设立和专业发展上可以做到人无我有，人有我精，人精我新的学科建设格局．激发和培养了科技人员的创新，意识有利于医院规模经济的形成。     

谈生殖感染的综合防治与计划生育优质服务

生殖道感染（RTI）是威胁人类生殖健康，特别是妇女身心健康的主要疾病，对妇女身心造成严重危害，对育龄妇女而言，不仅限于妇女本身，其下一代的健康也受到威胁，并造成沉重的社会和经济负担。生殖道感染广泛存在，直接影响着计划生育手术的安全和质量，生殖道感染的症状常被误认为是某项计划生育措施的副作用，影响了计划生育服务对象服务的需求利用，生殖道感染可导致不孕，死胎和新生儿感染，最终可减少人群对避孕节育的需求。由计划生育技术部门开展生殖道感染综合防治，能够促进广大群众的生殖健康，给每个家庭带来欢乐和幸福，体现计划生育优质服务以人为本的精神，从而提高广大群众对计划生育的满意率，减少对计划生育工作的抵触情绪。对于基层服务站，主要从以下几个方面进行综合防治。     

动态气体校准仪的研究和应用

介绍了计算机控制动态气体校准仪的工作原理及实现过程，采用V／F板作为计算机和气体供给系统的接口，并通过C语言编程，较为友好的界面，实现了高精度浓度各种校准气体的产生。     

浅谈水泥混凝土路面断板原因及预防措施

对水泥混凝土路面施工中产生的断板问题进行分析,并提出了预防措施。     

Structural and Electrical Characteristics of Pb（Zr0.53,Ti0.47）O3 Thin Films Deposited on Si （100） Substrates

Pb(Zr0.53, Ti0.47)O3 (PZT) films were directly deposited on Si substrates without a buffer layer by pulsed laser deposition. Only(110)-oriented PZT peaks (other than Si substrate peaks) were observed from the XRD data. The electrical properties of the PZT/Si capacitor were characterized in terms of both the capacitance versus voltage (C-V) and current versus voltage (I-V) measurements. The clockwise trace of the C-V curve shows ferroelectric polarization switching, as is expected. From the I-V curves, the Schottky emission and spacecharge-limited-current behaviour are found to be the mainly leakage current mechanism in a certain electric field range in the negative and positive bias, respectively.     

Multi-path propagation of acoustical wave and time reversal field in a solid plate

The multi-path effect of the acoustical wave in a solid plate is studied. The multireflection and wave conversion of the cylindrical compressional and shear waves, which are excited by an infinite strip on a free surface of the solid plate, are analyzed thoroughly by the far-field approximation method. The concise analytical representations of the cylindrical waves are obtained. The time reversal processing is then applied to the propagation of the cylindrical waves and analyzed theoretically and experimentally. It is shown that the waves coming from different array elements and different paths all arrive at the original place after the time reversal operation. It indicates that the time reversal can compensate automatically the wave aberration caused by the multi-path effect. The self-adaptive focusing of the time reversal field is also analyzed quantificationally by the focusing gain and the ratio of the principal to the second lobe. The effects of the focus position and the aperture of the transducer array on the focused field are also investigated. It shows that theoretical and experimental results are consistent to each other very well.