(110)晶面全择优取向Cu镀层的制备及其条件优化

研究了添加剂聚乙二醇(PEG)、氯离子(Cl－)和电流密度对Cu的电沉积过程的影响, 着重探讨了制备(110)晶面全择优取向Cu镀层的电沉积条件及其形成机理. 循环伏安(CV)结果表明, PEG阻化Cu的电沉积, Cl－加快Cu的电沉积速率. XRD实验结果表明, PEG和Cl－在一定浓度范围有利于(110)晶面择优取向; 这两种不同特性的添加剂的协同作用可以制得(110)晶面全择优取向的较薄的Cu镀层; 所制备的全择优Cu镀层较稳定. 全择优取向Cu镀层形成的机理在于PEG和Cl－吸附过程联合起作用, 在不同晶粒的不同晶面进行选择吸附, 改变了晶面的生长速率及晶粒的快生长方向.     

α射线在磁场和电场中偏转的早期实验

对放射性物质所发出的α射线的东质所进行的探索人约经历了10年(1898-1908)的漫长历程.其中,关键而又首要的一步是α射线的粒子性的证实.它是通过卢瑟福(Ernest Ru-therford 1871-1937)在 1902年秋天所作的α射线在磁场和电场中偏转的实验所完成的.这些实验曾被N·费瑟(Normann　Feather)誉为整个科学史上最惊人的实验之一[1]. 卢瑟福于1902-1903年期间,对放射性的本质和起因进行了实验上的研究和理论上的探索,与索迪(F.Soddy)合作发现了放射性衰变规律.这一蜕变理论又开拓了两个新的领域:不同放射性物质之间本质的联系和放射性变化中所…     

固体表面室温燐光法测定淫羊藿甙

１引言 淫羊蕾甙（ｉｃａｒｉｉｎ）为中草药淫羊蕾的主要有效成分,有增加冠脉血流量的作用。淫羊蕾甙的测定方法有薄层扫描法,高效液相色谱法等。固体表面室温光法是一种微量技术与痕量分析相结合的分析方法,而建羊蕾甙的室温光法的研究未见文献报道。本文以Ｄｄ（Ａｃ）２为重原子微扰剂,以聚酰胺膜作基质时,能诱导出淫羊藿甙的ＲＴＰ发射。其激发波长为３００ｎｍ（弱峰）和４００ｎｍ（强峰）,发射波长为５００ｎｍ。淫羊藿甙含量在１．３５～６７５ ｎｇ／斑范围内与ＲＴＰ强度呈良好的线性关系,检出限达０,０６ ｎｇ／斑。该…     

Birefringence Grating and Surface Grating in Azobenzene Polymer Liquid Crystal Films Investigated by Near—Field Optical method

The birefringence grating and the surface grating in azobenzene polymer liquid-crystal (Azo-PLC) films are studied by a near-fied scanning optical microscope.With laser irradiation,the refractive index change caused by birefringence and the sinusoidal surface profile are observed at the near-field transmittance image and the surface topography of the grating.The grating period and the peak-to-peak value of the sinusoidal surface profile are 0.8μm and 40nm,respectively.The maximum diffractive efficiency of the grating is 2% .The dynamic process of the grating formation is probed and analysed.The mass diffusion responsible for the formation of the surface grating due to the temperature rise is analysed.     

Robust stability for a type of uncertain time-delay systems

ＮｏｔａｔｉｏｎＲ　ｒｅａｌ＿ｎｕｍｂｅｒｆｉｅｌｄｘ　ｖｅｃｔｏｒ;ｘ=(ｘ1 ,ｘ2 ,… ,ｘｎ) Ｔ,ｘｉ∈ＲｘＴ　ｔｒａｎｓｐｏｓｅｏｆｖｅｃｔｏｒｘＡＴ　ｔｒａｎｓｐｏｓｅｏｆｍａｔｒｉｘＡλｍａｘ(Ａ)　ｍａｘｉｍｕｍｅｉｇｅｎｖａｌｕｅｏｆＡλｍｉｎ(Ａ)　ｍｉｎｉｍｕｍｅｉｇｅｎｖａｌｕｅｏｆＡ‖ｘ‖　Ｅｕｃｌｉｄｅａｎｎｏｒｍｏｆｖｅｃｔｏｒｘ;　　　‖ｘ‖ =(ｘＴｘ) 1 / 2‖Ａ‖　ｍａｔｒｉｘｎｏｒｍｏｆＡ ;　　　　　　‖Ａ‖ =λ1 / 2ｍａｘ(ＡＴＡ)μ(Ａ)　ｍａｔｒｉｘｍｅａｓｕｒｅ;　　　 μ(…     

一类不确定时滞系统的鲁棒稳定性

给出了不确定时滞系统鲁棒稳定的若干结果,同时讨论了这类系统的稳定度,改进了前人关于时滞系统稳定性和鲁棒稳定性的一些结论,并给出了应用的例子。     

戊唑醇的分子结构、理论计算及热力学性质研究

在甲苯溶剂中利用缓慢蒸发法得到1-(4-氯苯基)-4,4-二甲基-3-(1H-1,2,4-三唑基甲基)戊醇-3（戊唑醇）的单晶,通过 X射线单晶结构分析法测定其晶体结构,晶体属单斜晶系,空间群为P2(1)/c,晶胞参数为：a = 1.1645(1) nm,b = 1.6768(2) nm,c = 1.7478(2) nm,β= 92.055(2),Dcalc.= 1.199 g/cm3,Z = 4,F(000)= 264。运用密度泛函理论 (DFT) B3LYP得到其优化几何构型并得到其频率。计算得到的结构参数与相应的实验值十分接近。运用微热量仪对标题物进行比热容测定,在所测温度范围283~353 K内,比热容随温度呈稳定的线性变化,根据测定的比热容方程,计算出戊唑醇以298.15 K为基础在283~353 K温区的的热力学函数：焓、熵和吉布斯自由能。     

Dynamical Stability of Gap Soliton of One-Dimensional Condensate in Optical Lattices with Strong Interatomic Interaction

By developing the multiple scales method, we analytically study the dynamics properties of gap soliton of Bose- Einstein condensate in optical lattices. It is shown that the gap soliton will appear at Brillouin zone edge of linear band spectrum of the condensates when the interatomic interaction strength is larger than the lattice depth. Moreover, the density of gap soliton starts to be relatively small, while it increases with time and becomes stable.     

200L槽式电化学去污装置

在电化学去污方法研究的基础上，研制了一套可以去除金属表面放射性污染物的槽式电化学去污装置。而且为了实现电化学去污槽的自动控制，设计了自动控制系统。其主要实现的功能有：(1)控制全系统供电电源；(2)控制电解液的pH值；(3)控制电解液的电导率；(4)控制空气搅拌的动力电源；(5)控制电解液再循环过滤系统。     

Robust H_∞ cluster synchronization analysis of Lurie dynamical networks

The cluster synchronization problem of complex dynamical networks with each node being a Lurie system with exter- nal disturbances and time-varying delay is investigated in this paper. Some criteria for cluster synchronization with desired H∞ performance are presented by using a local linear control scheme. Firstly, sufficient conditions are established to realize cluster synchronization of the Lurie dynamical networks without time delay. Then, the notion of the cluster synchronized region is introduced, and some conditions guaranteeing the cluster synchronized region and unbounded cluster synchro- nized region are derived. Furthermore, the cluster synchronization and cluster synchronized region in the Lurie dynamical networks with time-varying delay are considered. Numerical examples are finally provided to verify and illustrate the theoretical results.