模拟实验

A prediction model has been proposed to deal with threshold voltage shift as a function of 1MeV neutron flux and gate oxide thickness, and to deal with room-temperature annealing of threshold voltage shift induced-by 〓Coγ as a function of electric field and gate oxide thickness. The commonness and individuality of MOS device degradation between hot-carrier effect and ionizing radiation were investigated. The dependence of substrate current, gate current and threshold voltage shift due to hot-carrier on gate oxide thickness were simulated with MEDICI-2D simulator. The photocurrents of PN junction and bipolar transistor were studied. Their transient responses on varied bias voltages, pulse durations and absorbed doses were simulated. The influences of NPN base width on base and collector photocurrents were investigated. We also studied 1MeV neutron displacement damage in PN junction, and calculated reverse current leakage under the neutron flux of 2. 67×10〓 per square centimeter. 3 The study of nondestructive screening method for MOS radiation tolerance A theoretical and experimental study of nondestructive screening methods for radiation tolerance of nMOS and pMOS were firstly fulfilled. We determined the informative parameters pertinent to the method and proposed how to deal with experimental data and verify obtained results statistically, as well as make the required steps for nondestructive screening. Based on the experimental data of 180 samples of discrete pMOS devices, the relation between sample quantity and correlation coefficient, screening equation, and other significant results were obtained from the threshold voltage shifts of pre-and post-irradiation samples.

二、分立器件电离和位移辐射损伤响应研究在国内首次开展了电离辐射引起的氧化层阈值电压漂移和退火理论研究，编程计算了1MeV中子引起的MOS器件阈值电压漂移与中子通量及栅氧厚度的关系，计算了〓Coγ光子引起的阈值电压漂移及退火的时效曲线与纵向电场和栅氧厚度的关系等，对评估MOS型集成电路电离损伤和加固方法研究，以及论文中开展的MOSFETs无损筛选方法研究奠定了基础；分析了MOS器件热载流子损伤效应与辐射电离损伤效应之间的异同性，利用二维模拟软件MEDICI-2D模拟了衬底电流和栅电流，在不同栅氧厚度下随栅压的变化曲线，计算了热载流子效应造成的阈值电压漂移，研究结果对当前存在的以热载流子效应研究取代电离辐射损伤实验研究的设想，具有重要的参考价值；开展了PN结和双极晶体管电离光电流研究，计算了不同偏压、不同辐射脉宽和不同吸收剂量下PN结光电流的瞬时响应，计算了不同辐射脉宽下NPN晶体管基极电流和收集极电流的瞬时响应，以及基区宽度对NPN晶体管光电流的影响，研究结果对双极器件抗电离辐射损伤响应及加固方法研究具有重要意义；在国内首次开展了器件位移损伤的理论研究，分析了辐射产生的缺陷对电性能的影响，计算了注量为2.67×10〓cm〓的1MeV中子产生的缺陷对PN结反向电流的影响。

With case study in Wufendi Watershed of Hufuchuan Basin, landscape dynamics simulation analysis was studied at different scales including leaf scale, ecosystem scale and landscape scale through field experiments with model simulation.

本研究以皇甫川流域的五分地沟小流域为例，野外实验和模型模拟相结合，从植物的叶片尺度到生态系统尺度，再到景观尺度，进行了小流域的景观系统动态模拟分析的研究。

Thermodynamic properties and structure of water under superhigh pressure were investigated by Equilibrium Molecular Dynamics simulations. The obtained heat of vaporization and self-diffusion coefficient are in good agreement with the experimental data.

采用平衡分子动力学方法，模拟研究了温度范围为243~348K、压强范围为0.1~400MPa条件下水的热力学性质、结构和动力学性质，模拟结果与实验值吻合较好。

In experiments, a simulation environment which set up a topology to simulate the satellite link were built and tracing and analysis of several simulation schemes were performed.

在实验中，建立了模拟卫星链路特性的模拟环境，并对几种改进方案进行了跟踪分析。

Finally, this model was used to simulative calculating, and the sensitivity of parameters in it was analyzed.

并使用这个模型进行了模拟计算，发现它与实验测得的数据吻合得较好；且针对方程各个参数的敏感程度进行了模拟计算。

The simulator equipment can monitor various embankments with different boundary conditions,such as temperature,distributions of soakage line and scales.

堤坝渗流模拟装置可实现不同水温、不同浸润线、不同规格堤坝和堤坝渗流程度的重复模拟，给出了一种野外专用的传感光缆实验结果。

Using this strict solution, the reaction flow of nitromethane pyrolysis under the shock tube experiment conditions is simulated, the numerical results are found to be in excellent agreement with the experimental data.

对硝基甲烷激波管热解进行了模拟，并把耦合算法得到的模拟结果和激波管实验数据进行了对比验证，两者符合较好。

Made the numerical simulations and experimental verification to the flow characteristics of J90 supercharge compressor using numerical simulation method.

采用数值模拟方法，对 J90增压器压气机内的流动和特性进行了数值模拟和实验验证。

Afterward, inspired by the experimental results, we simulated both the loop and the straight line bidirectional transmission systems.

且由这两个实验的结果所启发，我们利用VPI这一模拟软体模拟比较直接双向传输架构与双向回路架构。

Multiple antenna arrays are often used to overcome the effect of channel fading which is caused by multipath interference. In chapters 4 and 5 ,we derive spatial correlation equations of ULA ,UCA and CRA for two types of angular spread distributions (uniform distribution and truncated Gaussian distribution).We also compare the difference between these antenna arrays by showing the bit error rate simulation results and discuss the relationship between BER and spatial correlation. In a multi-user mobile radio environment , we present simulation results to show that adaptive MBER algorithms have better performance than the traditional MMSE algorithm.

多天线阵列常被用来克服多重路径干扰导致通道衰减的影响，我们对各种天线阵列架构进行比较，在第四、五章中推导出ULA、UCA与CRA个别对两种角度扩散机率密度分布的空间相关性函数，由实际实验模拟的位元错误率图形比较天线阵列间的差异，并讨论位元错误率与空间相关性之关连，在多用户端行动通讯环境下，我们也由模拟验证可适性MBER演算法，会比传统MMSE准则有更好的效果。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！