查询词典 identification of the first kind

This thesis is divided into six parts. The first chapter is preface, the current status of research in the inverse problems for parabolic partial differential equations is reported; the second chapter is "regularization methods for numerical differentiation and their applications ", in this chapter we investigate many regularization methods from a viewpoint of regularization theory and algorithm, some applications in the inverse problems for parabolic partial differential equations are given; the third chapter is "spectral regularization methods". Based on Fourier analysis, within the framework of regularization theory, we apply the spectral methods to some ill-posed problems. Many numerical experiments are done in order to show the validity of the methods; the fourth chapter is devoted to wavelet dual least squares method and a revised wavelet method; in the fifth chapter,we combine finite difference method with method of lines and apply it to the backward heat conduction problem in time; in the sixth chapter "identification problems for unknown source ", the essence and the degree of two problems related to source identification are pointed out, at the same time, some numerical methods are reported.

本文分为六个部分，第一章前言简要分析了国内外抛物型偏微分方程反问题的研究现状；第二章数值微分的正则化及其应用从正则化理论和算法的角度出发，考察了许多正则化方法，还给出了数值微分在抛物型偏微分方程反问题的一些应用；第三章谱正则化方法是在Fourier分析的基础上，在一般正则化理论的框架下，给出了这种方法在各种不适定问题中的应用，数值实验表明谱方法是有效的；第四章研究了小波对偶最小二乘方法和改进的小波方法；第五章主要研究了有限差分方法结合线方法在时间反向热传导问题中的应用；第六章是未知源识别问题，主要指出了两类未知源问题的不适定程度和不适定本质，同时报告了一些数值方法。

This paper is concerned with two problems: First, a formula is derived to estimate the error of system identification from the autoeorrelative function of stationary random disturbances and that of pseudo-random sequences. It can be used to select the type of pseudo-random sequences to be used for quick identification with a given error.

本文讨论了两个问题：(1)导出了平稳随机干扰的自相关函数、伪随机序列的自相关函数和系统脉冲响应辨识误差之间的定量关系式，可用来选择伪随机序列和估计试验误差。

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的"虚拟仪器"的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

Remove row and column' and 'put a big number' have been used for the first boundary;a continuous Regional Identification Function is used on the basis of non-variant nodal virtual flux method for the free surface boundary;Gauss formula is used to make the curved surface integral of the free surface boundary transformed as the difference between volumn integral and other curved surface integral to calculate the integral item on boundaries, which avoiding finding the position of free surface, while the continuous Regional Identification Function is applied to calculate volumn integral and surface integral;Crout and PCG method is used for solusion.

对于已知水头边界，采用&去行去列法&和&置大数法&进行处理；对于自由面穿过的单元，在固定网格节点虚流量法的基础上，引入连续的区域识别函数；对于非稳定渗流中自由面边界积分项，采用高斯公式将求自由面的面积分转化为求体积分与其他面积分之差，避免了求自由面的具体位置，同时在计算体积分和面积分时采用连续的区域识别函数；在解法上，采用直接解法和PCG法。

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的&虚拟仪器&的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

The site that there are a lot of kinds now exists at any time by the possibility of K, for example: Belle picture kind, pornography kind, illicit take kind, lottery kind, gamble kind wait for a likelihood to be involved break the law, the site that hitting edge ball suggests to be not exchanged with them, if their site by K, you not know the inside story, at any time likelihood by complicity.

现在有很多类型的站点都存在随时被K的可能性，例如：美女图片类，色情类，私服类，彩票类，赌博类等可能涉及到违法，打着擦边球的站点建议不要去和他们交换，如果他们的站点被K，你们又不知情，随时可能被连累。

Avoid potential dangerous sex: The site that there are a lot of kinds now exists at any time by the possibility of K, for example: Belle picture kind, pornography kind, illicit take kind, lottery kind, gamble kind wait for a likelihood to be involved break the law, the site that hitting edge ball suggests to be not exchanged with them, if their site by K, you not know the inside story, at any time likelihood by complicity.

避免潜在的危险性：现在有很多类型的站点都存在随时被K的可能性，例如：美女图片类，色情类，私服类，彩票类，赌博类等可能涉及到违法，打着擦边球的站点建议不要去和他们交换，如果他们的站点被K，你们又不知情，随时可能被连累。

A woman can attract attention and allow a woman on the likes Man, he must be a very charismatic man, one of with a "swelling of the liver Qi" Man, are the most characteristic of a Man, he not only has charisma, but also very sexy, at his body emitting a kind of a Man's atmosphere, attracting a woman, women enjoy the kind of "riffraff" and his bones are decent, kind and affectionate intention, and is a confident, capable and full of connotation a person, but his language and actions, from time to time showing the kind of cool,Supercilious characteristics, giving a "bad" feeling, the kind of "lump in the abdomen gas" is not a bad thing to do at him, and are a feeling, a spirit likeness, are confident the performance of a man with "swelling of the liver Qi" Men are most attractive to women and the destruction of a Man.

能够吸引女人目光，并让女人喜欢上的男人，他一定是个很有魅力的男人，其中，带有"痞气"的男人，是最具男人特质的，他不但有魅力，而且很性感，在他身上散发出的那种男人的气息，吸引着女人，女人喜欢那种"痞气"，他的骨子里是正派的、善良的，有情有意的，而且是个自信的、有能力的，充满内涵的一个人，但从他的语言和行动上，时不时流露出的那种酷酷的、旁若无人的特质，给人一种"坏坏"的感觉，那种"痞气"不是他在做坏事，而是一种感觉，一种神似，是一个男人自信的表现，带"痞气"的男人是对女人最具吸引力和杀伤力的男人。

Wang Hang: Our eye comes round to say, because we are pure iatrical this kind discharge, this kind of discharge occupies us highest, because of other our person of the same trades they basically are a healthy people with patient confuse sth with sth else, actually healthy person follows such word the patient's demand is completely different, for instance healthy person pays close attention to very much, you can see a lot of health now kind the website is being done doing became bisexual and healthy website, so say really impolite, this kind of information I feel to be able to drive away the patient, they do not need the patient that needs a help this kind of information.

王航：我们现在来说，因为我们是纯医疗的这类的流量，这类流量占我们最高的，因为其他的我们的同行他们基本上都是把健康人跟患者混为一谈，这样的话其实健康人跟患者的需求完全不一样，比如健康人很关注，现在你可以看到很多健康类的网站做着做着都成了两性健康网站，这么说确实不客气，这种信息我觉得会把患者赶走，需要帮助的患者他们不需要这种信息。

When the hybrid region senior official jumbles together with black area senior official black Germany is graceful, ended after the conference with great speed rushes together, some several hundred starship is already shot down, but this kind of bombing, has truly seriously disturbed the kind of person robot flight vehicle construction speed, however this time kind of person robot used in the Moon crater base the massive residues already to make several hundred own starship, only was this kind of flight vehicle structure nearly entirely alike which constructed with the humanity, obviously the kind of person robot wisdom and the thought and the humanity were how close!

当混血区域长官混为一谈和黑区长官黑德曼，在会议结束后一起火速赶到的时候，已经有数百架星际飞行器被击落，但这种轰炸，确实严重干扰了类人机器人的飞行器建造速度，然而此时类人机器人利用月球环形山基地内的大量剩余物资已经制造了几百架自己的星际飞行器，只是这种飞行器的结构几乎和人类建造的一模一样，可见类人机器人的智慧与思维和人类是多么的相近啊！

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。