Abnormal dielectric characteristics of PMN-32%PT single crystal under dc bias

It has been reported that the single crystal of relaxor ferroelectrics (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-xPT) with the compositions near the morphotropic phase boundary (MPB, 0.28相似文献   

全面和谐发展教育,德育为先——苏霍姆林斯基全面和谐发展理论对学校德育工作中的实践要求

人的全面发展是马克思主义教育理论的一个基本原理。本文试以苏霍姆林斯基全面和谐发展理论为依据,就德育在全面和谐发展教育中的地位、现阶段德育中的现状、以及在创新德育教学内容和方法上稍做论述。     

Researching on quadrature conversion structures For an UWB demonstrative receiver

1. INTRODUCTION As the development of technologies of digital signal processing and integrated circuits, the structure of wireless communication system has been improved. Many schemes for software defined radio (SDR) systems have been developed since 1995, and they can be divided into five tiers of solutions according to their developing history and their definitions[1]. The five tiers are conventional hardware-implemented scheme; software-controlled radio scheme; SDR, that implements m…     

秋水仙素诱导青虾次级卵母细胞二倍体初探

以青虾卵巢为材料，采用秋水仙素诱导多倍体次级卵母细胞．经滴片试验，确立此实验最佳滴片高度为1．5cm，通过设置5个秋水仙素浓度(0．08～0．40mg／mL)及3个作用时间(6～24h)，观察发生染色体加倍的细胞相对数目．实验结果表明：在使用秋水仙素的浓度为0．08～0．40mg／mL，处理6～24h时都可以获得多倍体卵细胞．在秋水仙素浓度是0．32mg／mL，处理6h可得到最高二倍体突变率(32．58％)．还测试了0．32mg／mL COM作用6h时ATPase活性与生理盐水对照组的变化，结果显示COM会在一定程度上影响细胞的新陈代谢．但是50％左右的成活率表明，这种诱导突变的方法仍具有一定的应用价值．     

Self-assembling Characteristics of Amphiphilic Star Block Copolymers with a Polyelectrolyte Shell

1 Results Amphiphilic block copolymers are capable of forming supramolecular assemblies resembling those observed in nature,such as spherical micelles,worm micelles,and vesicles.Changing the solvent composition,ionic strength or pH of the polymer solution may induce the self-assembly of block copolymers or trigger the transition between the geometries of noncovalent assemblies.In the current work,we have synthesised starlike amphiphilic block copolymers having hydrophobic poly(methyl methacrylate),PMMA,core,and hydrophilic poly(acrylic acid),PAA,shell.The self-assembling characteristics of these polymers have been investigated in aqueous solutions by light scattering and direct visualisation by cryo-transmission electron microscopy (cryoTEM)[1]. Computer simulations along with the theoretical predictions made for the star-like system based on mean-field theory have been used to support the experimental observations[2]. The association of the starlike macromolecules resembles that of charged biopolymers,such as actin,since a balance between attractive and repulsive forces is required for the formation of cylindrical assemblies and can be manipulated by changing the pH or the ionic strength of the solvent[3].     

Experimental Observables on Nuclear Liquid Gas Phase Transition

Progress on nuclear liquid gas phase transition （LGPT） or critical behavior has been simply reviewed and some signals of LGPT in heavy ion collisions, especially in NIMROD data, are focused. These signals include the power-law charge distribution, the largest fluctuation of the fragment observables, the nuclear Zipf law, caloric curve and critical exponent analysis etc.     

生态社会的召唤

人类发现自身陷入一种境地，在那里似乎没有真正意义的途径使我们从围绕自身的技术型企业中解脱出来，所以我们需要创造一个走向生态纪元的社会。很多社团近期已经热心于进入一个生态社会并在一些领域采取行动，这些领域便是新故事、生物区域主义以及生态特征。     

沥青砼路面的早期病害类型及防护措施

在现代化公路建设中，沥青混凝土路面凭借着自身的发展优势越来越被道路建设者们广泛应用，在个别省市的未来建设规划中，正逐步代替以往占据着主导地位的水泥混凝土路面，为人民的出居起行提供更多快捷方便。因此，沥青路面使用质量的好坏关乎社会大众，对此，研究沥青路面的破损特别是早期破损具有的重要意义。     

有限群极大子群的CI-截

应用有限群极大子群的CI-截性质,讨论有限群G之正规子群H的可解性,得到4个重要结论.这4个结论推广了文献[3]的相关结果.     

浅谈步进梁式加热炉炉底设备的安装

介绍了新钢厚板厂2#加热炉炉底斜轨座、提升框架、平移框架、水梁及立柱的安装施工过程。