The Use of Quantum Potentials for Confinement and Tunnelling in Semiconductor Devices

As MOSFETs are scaled to sub 100 nm dimensions, quantum mechanical confinement in the direction normal to the silicon dioxide interface and tunnelling (through the gate oxide, band-to-band and from source-to-drain) start to strongly affect their characteristics. Recently it has been demonstrated that first order quantum corrections can be successfully introduced in self-consistent drift diffusion-type models using Quantum Potentials. In this paper we describe the introduction of such quantum corrections within a full 3D drift diffusion simulation framework. We compare the two most popular quantum potential techniques: density gradient and the effective potential approaches, in terms of their justification, accuracy and computational efficiency. The usefulness of their 3D implementation is demonstrated with examples of statistical simulations of intrinsic fluctuation effects in decanano MOSFETs introduced by discrete random dopants. We also discuss the capability of the density gradient formalism to handle direct source-to-drain tunnelling in sub 10 nm double-gate MOSFETS, illustrated in comparison with Non-Equilibrium Green's Functions simulations.     

引黄工程首次试通水期间泵站安全监测资料的分析

介绍了引黄工程泵站建筑物的结构特性、监测情况以及首次试通水期间 安全监测量的变化特点，指出了监测资料反映出的一些工程实际问题。通过定量分析，揭示 了建筑物承受的主要荷载以及监测量的变化规律，发现了工程问题发生和发展的原因，较为 系统、深入地从安全监测的角度研究了引水工程泵站地下洞室群的工作性态。     

Boundary Simulation of Pumping Groundwater on Two-layer Soft Soil Structure with Porous Media

Based on random theory, fluid dynamics, porous media and soil mechanic, the porosity and random characteristic of the two-layer soft soil in Wuhan region were studied in this paper. The random seepage co-efficient on the two-layer soft soil was analyzed, and the seepage model and its ranabm distribution function were given. The groundwater flow differential equations related to the two layer soft soil structure were also established. The evaluation procedure of effect boundary on the pumping water in deep foundation pit was put forward. More-over, with an engineering exantple, the probability distribution on random boundary prediction for pumping water of foundation pit was computed.     

HFT-1型土工布渗透率智能测试仪的研制

根据土工布在以排水为主的工程中 ,必须预先测定平面内水流量的需要 .研制了土工布渗透率智能测试仪 .介绍了该仪器的结构和测试原理 ,分析了仪器特点和相关数据 .     

高拱坝坝基排水问题

从工程事故实例启示和学习卡氏理论研究后，对高拱坝坝基排水目的，布置原则，排水方式及其技术参数及设等进行浅析。其中技术参数指标，目前难于数理定量，特搜集国内外部分工程数据进行初心，最后得到初步认识并提出建议。以供讨论。     

Solving A\underline x =\underline b Using a Modified Conjugate Gradient Method Based on Roots of A

We consider the modified conjugate gradient procedure for solving A = in which the approximation space is based upon the Krylov space associated with A ^1/p and , for any integer p. For the square-root MCG (p=2) we establish a sharpened bound for the error at each iteration via Chebyshev polynomials in . We discuss the implications of the quickly accumulating effect of an error in in the initial stage, and find an error bound even in the presence of such accumulating errors. Although this accumulation of errors may limit the usefulness of this method when is unknown, it may still be successfully applied to a variety of small, almost-SPD problems, and can be used to jump-start the conjugate gradient method. Finally, we verify these theoretical results with numerical tests.     

用最优控制原理进行地震勘探的数字仿真

本文建立了二维声波方程速度反演问题的其数学模型.为了提高其求反演的收敛速度,应用了最优控制原理导出关于层速度的梯度近似公式,用梯度法进行反演迭代,得到了较好的仿真效果.     

流动注射pH梯度技术分光光度法同时测定人发中锌铜含量及比值

研究了以５－Ｂｒ－ＰＡＤＡＰ为显色剂，采用流动注射ｐＨ梯度技术分光光度同时测定人发中锌铜含量及直接测定锌铜比值的新方法．该方法分析频率达到２０～３０次／ｈ，测定锌、铜的线性范围分别为０．２～５．０μｇ／ｍＬ和０．１～２．０μｇ／ＭＬ．方法简便快速，准确可靠，且具有良好的重现性，用于实际样品的测定，结果满意．     

弹性体应变的并矢分析

利用并失分析法，对弹性体的应变、几何方程和主应变进行了全面研究．本文与文献［３］和文献［４］初步形成了弹性力学并矢分析的基本理论体系．