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In order to improve the reliability of the nuclear Generating Sets and the stabilization of the power system, prevent the long time low frequency oscillation caused by the disturbed of the outside electrical net, assured improving the stabilization margin of the nuclear generating sets in the precondition of enough transient stability, validate the sensitivity of the parameter to the damping of Generating Sets of the MEC5220 digital excitation adjustor produce in Japan that used in the Second Project of Qinshan Nuclear Power Plant, confirm the parameter rationality of the digital excitation adjustor, optimize the parameter of PSS, in this paper, we put up a in-depth study to the principle of MEC5220 digital adjustor produce in Japan by the PSS/E software that develop by the PTI Company in the USA, completed the modeling of the excitation adjustor, PSS, generator, excitor, described the performance of this excitation adjustor, analyzed the essential reason that caused the low frequency oscillation, illuminated the factor that influence the damping characteristic of the MEC5220 digital excitation adjustor. Based on model and emulate, this paper optimized the primary parameter of the excitation adjustor, make a reasonable regulation to the PSS parameter.

为提高核电机组的运行可靠性和接入系统的安全稳定性，防止在外电网的干扰下核电机组发生长时间的低频振荡，保证机组在暂态稳定的前提下提高其稳定裕度，验证秦山核电二期核电机组所配日产MEC5220型数字式励磁调节器参数对机组阻尼的灵敏性，确定数字式励磁调节器的参数的合理性，优化PSS整定参数，本文利用美国PTI公司研发的PSS／E软件对日产MEC5220型数字调节器的原理进行进行了深入细化的研究，完成了励磁调节器、PSS、发电机、励磁机的建模，描述了该型励磁调节器的性能，分析了产生低频振荡的根本原因，阐明了影响阻尼特性的因素。

To the disadvantage exposed to us in national and foreign VTS system, and those putted up in application projects, the thesis did a farther study and consummation, and acquired some research fruits, as follows:1. Fulfilled the Eagle Eye function in Electronic Chart Display System.2. Designed a kind of simple algorithm for select chart. By this arithmetic it become true to auto select electronic chart when chart is zoomed.3. The realization of auto acquired field on electronic chart.4. The simulation of target data and error of radar and AIS by software.5. The fusion processing of the dynamic data those are collected from AIS and Radar.6. Resolve the target track problem of radar by the data fusion technology.7. The algorithm design of display field reduce, this function can improve the speed of display.

针对目前国内外VTS系统中暴露出的薄弱点，以及应用实践中表现出的不足本文对综合信息处理与显示系统做了进一步的研究和完善，取得了以下的研究成果： 1、电子海图显示系统中鹰眼图的功能设置与实现； 2、设计一种简易的选图算法，通过该算法实现可在海图放大、缩小时的自动选图； 3、电子海图上自动录取区的实现； 4、实现对雷达和AIS目标数据及其误差的软件仿真； 5、船舶自动识别系统中动态信息与雷达动态信息的数据融合处理； 6、利用数据融合技术解决雷达目标跟踪方面的问题； 7、海图空间信息中显示区域裁减算法的设计，该模块的实现大幅度提高了海图的显示速度。

In my study, we use a 4F acoustic lens which f-number is 1.3 to set up a photoacoustic imaging system. With same axial and lateral magnification, 3D photoacoustic imaging system with 4F acoustic lens can detect photoacoustic signal distribution on object plane in real-time, and get the different axial distance signal to show the 3D photoacoustic image by different signal receiving time.

本研究采用相对孔径为1.3的4F声透镜，设计三维光声影像系统，利用4F声透镜景深范围内之轴向与横向放大倍率相等，即时性的重现物平面所发出的同调性光声讯号分布，并利用不同的接收时间来呈现不同深度距离的讯号成像，取得物平面上受测物的三维光声影像。

With the direction of Professor Zhang Jiawei, basing on the clinic research of treating falling sickness with thread embedding therapy, summing-up many years clinic experience of thread embedding therapy, we observe and compare the two curative effect of thread embedding therapy and general acupuncture in treating chronic gastritis, in addition we study corresponding functionary mechanism with stomach electricity graph、gastrin、nucleotide、SP etc and provide science basis and theory instruction. According to the criterion of diagnosis and elimination set, 70 patients are took into the trial whom come from No. 1 affiliated hospital, among them 36 case are in the thread embedding Group, 34 case are in the acupunture Group.

本课题是在导师张家维教授及李素荷教授等协助导师共同指导下，在既往穴位埋线疗法治疗癫痫临床研究基础上，总结多年来穴位埋线疗法的临床经验，对穴位埋线及穴位针刺两种方法治疗慢性胃炎的疗效进行观察与比较，并拟用胃电图、脑肠肽、环核苷酸、P物质等指标变化来探讨其中的可能治疗机理，为临床的应用及推广提供科学的依据与理论指导。

Therefore, before the real estate opened up, IT is necessary to begin the Feasibility study on the project.

因此在房地产开发之前，对项目进行可行性研究是十分必要的任务。

My daily tiger tracking routine begins at dawn, when I drive up the 900 meter tall Kuntur Tittu, a hillock at the centre of my study area, to listen to signals from my tigers from a fire watch tower perched on its crest.

我日常的老虎追踪在黎明时分开始，我开车爬上900米高的昆特·缇图——我研究区域中心处的一座小丘，从建在山顶的火警观察塔收听来自老虎的讯号。

This dissertation starts with some basic theories about contract management and performance evaluation, and introduces the relevant knowledge on the research object simply to foreshadow theoretical foundation well for follow-up study.

本文从合约管理和绩效评价的基础理论开始，对研究对象的相关理论知识进行了简单的介绍，为后续研究做好铺垫和理论依据。

The personage inside course of study is analysed, the net buys trap to basically be centered on the small-sized shopping website of a few very frame-up compasses.

业内人士分析，网购陷阱主要集中在一些非常不正规的小型购物网站上。

From now on,I'll gather up my strength to study hard!

我决定了！从现在起，我将尽全力，努力学习！

Based on the adequate study of general method to solve linear equation group, this thesis employs incomplete Cholesky conjugate gradient method for the numerical stability and efficiency of solution process. In order to eliminate morbidity of FEM coefficient matrix and speed up its convergency, this thesis proposes a newly effective incomplete Cholesky decomposition preconditioned method and suggests some improved preconditioned schemes to the current popular ICCG methods.

为了克服系数矩阵病态特性和加快收敛速度，本文从完全的Cholesky分解出发，构造出了一种新的不完全分解预处理方法，效果显著；另外，在已有的不完全Cholesky分解预处理方法的基础上，提出了十分有效的改进方案。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。