Electrochemical study on screen-printed carbon electrodes with modification by iron nanoparticles in Fe(CN)<Subscript>6</Subscript><Superscript>4−/3−</Superscript> redox system

The remarkable enhancement of electron transfer on screen-printed carbon electrodes (SPCEs) with modification by iron nanoparticles (Fe_nano), coupled with Fe(CN)₆ ^4−/3− redox species, was characterized with an increase of electroactive area (A _ea) at electrode surface together with a decrease of heterogeneous electron transfer rate constant (k°) in the system. Hence, Fe_nano-Fe(CN)₆ ³⁻ SPCEs with deposition of glucose oxidase (GOD) demonstrated a higher sensitivity to various glucose concentrations than Fe(CN)₆ ³⁻/GOD-deposited SPCEs. In addition, an inhibited diffusion current from cyclic voltammograms was also observed with an increase in redox concentration and complicated the estimation of A _ea. Further analysis by the electrochemical impedance method, it was shown that this effect might be resulted from the electrode surface blocking by the products of activated complex decomposition.     

A screw dislocation by nonlinear continuum mechanics

ＡＳＣＲＥＷＤＩＳＬＯＣＡＴＩＯＮＢＹＮＯＮＬＩＮＥＡＲＣＯＮＴＩＮＵＵＭＭＥＣＨＡＮＩＣＳＰａｎＫｅ－ｌｉｎ（潘客麟）（ＤｅｐａｒｔｍｅｎｔｏｆＥｎｇｉｎｅｅｒｉｎｇＭｅｃｈａｎｉｅｓ．ＴｏｎｇｊｉＵｎｉｖｅｒｓｉｔｙ,Ｓｈａｎｇｈａｉ）ＣｈｅｎＺ...     

螺位错场的非线性力学解

本文以非线性连续体几何场论为理论基础,分析了无限大体中一个螺位错引起的应力场。结果揭示了非线性高阶效应的影响。当不考虑高阶效应时,所求得的应力场可退化为经典线弹性理论的结果。本文还对螺位错引起的体力矩场进行了求解。获得了无限大体中单个螺位错引起的体力矩的解析表达式。作为理论结果的应用,本文研究了界面附近螺位错的应力场和体力矩场。揭示了它们对界面力学性能的影响。     

非局部非对称弹性固体理论

本文基于非局部连续统场论和非线性连续体力学理论,建立了非局部非对称弹性固体的非线性理论.它完善和发展了Eringen等人所建立的非局部弹性场论.将文献[1]中所建立的非局部非对称弹性力学的线性理论推广到有限变形.证明了在非局部弹性固体中存在着非局部体力矩.非局部体力矩引起应力的非对称性,而非局部体力矩则由原子晶格相互作用形成的共价键所产生的.并应用本文建立的理论合理地解释了平面横波和纵波色散系关的不相似性.     

A new quadrilateral nonconforming model and its convergence

This paper presents a new quadrilateral nonconforming finite element. We deal with its convergence by using generalized patch test T error on stresses and displacements are obtained and numerical computations for plane elastic problems are given.     

The ring shells under gravitative loads

This paper gives Novozlov’s equation (ref. [1]) in a simple style of ring shells with equal thickness under the actions of gravitative loads. By means of Fourier series, the special solution of the equation is established. Using the results of the homogeneous solution in ref. [2], we find out the general solution of the problem, and derive the expressions of stress and displacement.Two examples are given as the application of the above results.     

HL-2A先进二维硬X射线成像CCD系统设计

为HL-2A装置设计了一种二维硬X射线成像CCD系统,用它能直接测量硬X射线辐射强度的二维时空分布I(z,y,t),并能得到电子速率分布fe(v,r,t)。为获得二级加热和无感电流驱动如ECH／ECCD,LHH／LHCD,ICRH／ICCD,NBIH／NBICD的效果、波可近性、共振层位置、能量沉积范围等方面的实验研究提供重要诊断手段;也可用于内破裂、大破裂、MHD,特别是q=2附近高模的MHD行为、热电子和超热电子的输运、被捕获的高能粒子图像以及与模式波(如m=1,n=1)共振引起的鱼骨模不稳定性、辅助加料引起和诱发逃逸电子雪崩现象的实验观察与研究。     

THE COUPLE MOTION BETWEEN VESSEL WALL AN DBLOOD IN THE ENTRANCE REGION OF A TAPERED VESSEL

ＴＨＥＣＯＵＰＬＥＭＯＴＩＯＮＢＥＴＷＥＥＮＶＥＳＳＥＬＷＡＬＬＡＮＤＢＬＯＯＤＩＮＴＨＥＥＮＴＲＡＮＣＥＲＥＧＩＯＮＯＦＡＴＡＰＥＲＥＤＶＥＳＳＥＬＣｅｎＲｅｎ－ｊｉｎｇ（岑人经）ＱｉｎＣｈａｎ（秦婵）ＴａｎＺｈｅ－ｄｏｎｇ（谭哲东）（ＳｏｕｔｈＣ...     

TiCl~4-Ga还原体系中芳基三卤甲烷的还原偶联反应

研究了在低价钛(TiCl~4-Ga)试剂作用下,α,α,α-三卤甲基芳烃的还原偶联反应,得到了脱卤偶联产物-二卤代烯烃、炔烃。     

象增强器用小型化大动态脉宽可变高压开关脉冲源

本文阐述了高压脉冲产生的新的机理,并用此思想制作了小型化、大动态脉宽可变的高性能高压开关脉冲源.