最基本的部分

Firstly, this paper investigated roundly the basic theory of the ambient vibration method, analyzed systematically the main methods of ambient vibration identification, and discussed their advantages and disadvantages. Then we established the finite element model of structural dynamics and test model and analyzed their mutual relation, improved MUSIC method and correlation function method in the harmonic identification, and gave the subspace method and correlation function method based on continuous model, which is multi-harmonic retrieve technique. And then, this paper also puts forward least-squares method to estimate directly structural physical and modal parameters; this approach replaced the derivative operator in the continuous time model with an equivalent approximation, and estimated the physical parameters of structures by the least-squares method. And then, we discussed the approximation methods of derivative and their convergence. Finally, this paper researched the modal parameters of a frame structure by the simulation and test. The results demonstrated that subspace method, correlation function method and the least-squares method are effective and stable respectively.

全面地研究环境振动识别方法的基本理论，系统地分析环境振动识别方法的主要方法，讨论它们的优点和不足；建立结(来源：6666AB44C论文网www.abclunwen.com)构动力学的有限元模型和试验模型，分析有限元模型与试验模型之间的相互关系；改进谐波识别中的MUSIC识别方法和相关函数识别方法，给出大型结构模态识别的连续型的子空间分解识别方法和相关函数识别方法，这个方法是多元谐波识别方法；提出直接识别结构的物理参数和模态参数的最小二乘方法，这个方法利用导数的近似值代替导数值，并运用最小二乘方法识别结构的物理参数，讨论导数近似值的选择方法，分析算法的收敛性；通过仿真计算和模型实验，研究高层框架结构的模态参数识别，验证子空间分解识别方法、相关函数识别方法和最小二乘识别方法的有效性，算法的稳定性；从理论和试验两个方面分析和研究噪声对识别精度的影响，影响识别精度的因素，以及部分模态成分的模态参数不能够被识别的原因。

Some constraints are selected, and omitted according to the most-obtuse-angle principle. The smaller problem is solved with the simplex method. Then the omitted constraints are added to restore the original problem. If all the constraints are satisfied, then a basic optimal solution is reached. In the other case, the dual simplex method is used to obtain the basic optimal solution.

该算法依据最钝角原理略去部分约束得到一个规模较小的子问题，用原始单纯形算法解之；再添加所略去的约束恢复原问题，若此时全部约束条件均满足则已获得一个基本最优解，否则用对偶单纯形算法继续求解。

In each of these passages, as well as others, Galileo reveals insights not only into the subtle workings of nature, but also into the mind and heart of the man behind the science: the careful craftsman (the builder of the finest telescopes in the world), the meticulous theorist (cautious about over-generalizing or speculating on more fundamental causes), the formidable observer and experimentalist (with a brilliant nose for the most urgent problems that can be solved with the new instruments and with impeccable interpretations of the importance of his major findings), the wonderful storyteller (with one voice tuned to persuade the reader of his point of view and with another voice trying to anticipate possible philosophical or religious objections), as well as the political opportunist (all too willing, as was the practice then, to bow and scrape before powerful personages who might advance his personal fortunes).

在这样的每一章节，以及书中其他部分，伽利略显示出的洞见，不仅是自然世界的微妙运作，也透露了科学背后的人类心灵：细心的工匠（世界上最精细的望远镜的制造者）、一丝不茍的理论家（对综合概括或思索更基本的原因，非常小心）、令人敬畏的观测者与实验家（对於可以采用新仪器来解决的急切问题具有灵敏的嗅觉，并对重大发现的重要性提出周到的诠释）、非常会说故事的人（以一种声调来说服读者相信他的观点，并且以另一说法试图预先回答哲学与宗教上可能遭遇的反对见解），以及政治投机份子（如那时的常例，所有人都十分愿意向可能促进自身利益的权贵卑躬屈膝）。

In Chapter 2,I consider a queuing system in which there are two exponential servers, each having his own queue, and arriving customers will join the two queues separately, and analyze the two-dimensional Markov process representing the numbers of jobs in the two stations. A functional equation for the generating function of the stationary distribution of this two-dimensional process is derived and solved through the theory of Riemann-Hilbert boundary value problems. In Chapter 3, I consider the system with two parallel queues, in which arrivals join the shorter queue.I describe the problem of coupling and show that the generating function Fcan be continued as a meromorphic function to the whole complex plane.

全文包括三大部分：第一章介绍了基本的背景、研究进展和文章主要采用的方法；第二章研究的是有两个服务员共享的简单的排队方式的模型，即每个服务员有各自的队列，两队队长互不相关，分析了代表两个队长的二维马尔柯夫过程，推导出了二维过程的平稳分布的母函数的方程，并运用Riemann—Hilbert边值问题理论解出了母函数的表达式；第三章研究的是JSQ-PS模型(the joining the shortest queue model with processor sharing)，模型是组合了加入最短队模型和处理器共享模型而成的有用排队模型。

The first one focuses upon the fundamental theory and methods of system identification, including the basic concepts of system description and identification,review of matrix theory, stochastic process and pulse response of linear systems; the first principle models for lumped and distributed parameter systems; modeling of bioreactions; auto regressive moving average model; weighted least square and regressive weighted least square for parameter estimation of ARMA model; Runge-Kutta and Simplex methods; an example of BPNN application; as well as Kalman Filter.

第一部分包括知识驱动建模、数据驱动建模、参数估计和状态估计的基础理论和方法。具体为：(1)系统辨识和系统描述的基本概念，包括矩阵论、随机过程、线性系统的脉冲响应函数等基础知识回顾；(2)基于动态物料和能量衡算的集总参数、分布参数对象的知识驱动建模方法；(3)生物反应系统的建模方法；(4)自回归移动平均模型；(5) ARMAX模型参数的加权最小二乘参数估计一次性算法和递推算法，相应的统计性质；(6)龙格库塔法和单纯形法；BP神经网络应用实例；(7)卡尔曼滤波器，及其与加权最小二乘参数估计递推算法的对比。

Then, the relation between vibration and sound, the acoustic holography method, the indeterminacy and identifiability of BSS, the BSS algorithm are discussed in detail. Based on above researches, the dissertation is divided in following four sections. The first section investigates the BSS algorithm suitable to acoustic feature separation. The algorithm of the joint approximate diagonalization of eigen-matrices is proposed. The spectra or the time-frequency distributions of source signals are the interesting features in ABD and they are separated from mixing signals by JADE algorithm. Then, the convolutive mixing model is transformed into a high-dimension instantaneous mixing model, and the deconvolution of source signals is achieved by the joint approximate block diagonalization of eigen-matrices. The proposed algorithm has a global minimum, and it is unsensitive to noise interference.

论文首先概述国内外声学诊断研究进展与盲分离研究进展，给出机器噪声声场与盲分离的数学描述，讨论了声振辐射、声全息、盲分离模型、盲分离可解性、盲分离结果不确定性、分离算法等基本问题，在此基础上，论文的研究工作分为以下四个部分：第一部分研究适用于声学特征分离的盲分离算法，提出基于特征提取的联合近似对角化盲分离算法，该算法以频谱特征或时频特征作为分离目标，从混合信号中分离源信号频谱特征或时频特征，最大限度地保留了与声学特征提取有关的频谱特征或时频特征，采用模型变换把卷积混合模型变换为一个高维瞬时混合模型，通过联合近似分块对角化算法实现源信号频谱特征与时频特征的盲反卷积。

objective to introduce a method for repair of defects of alae nasi.methods transplantation of whole or partial free auricle composite tissue was designed in reconstruction of alae nasi.partial auricle composite tissue transplantation was used in 14 patients,the area of the graft was 1.0cm×1.5cm～1.9cm×2.5cm.whole auricle composite tissue transplantation was used in 6 patients,the area of the graft was 0.5cm×0.5cm～0.8cm×1.2cm.results all grafts survived.the grafts were dark red or light red in color,there were no blisters on them.follow-up of more than six months showed good results.conclusion in many methods for repair of defects of alae nasi,this method is simple,the appearance of alae nasi is good after operation and there is no new scar on face.

目的 修复鼻翼缺损。方法采用全层或部分耳廓复合组织游离移植的方法修复鼻翼缺损20例，其中以鼻翼残存瘢痕组织翻转作衬里，然后进行部分耳廓复合组织游离移植14例，移植物面积最小1.0cm×1.5cm，最大1.9cm×2.5cm；利用耳廓复合组织全层嵌入游离移植修复鼻翼缺损者6例，移植物面积最小0.5cm×0.5cm，最大0.8cm×1.2cm。结果 20例移植组织全部成活。色泽呈暗红至淡红不等，无水泡。随访半年移植物色泽与鼻组织基本近似，供区隐蔽。结论在诸多鼻翼缺损修复方法中，该方法简便易行、术后鼻翼外形好，面部显著部位不增加新的瘢痕，有独到优越性。

Any high Re number flow over bodies consists of three basic flows: the flow with convection-dominant in all spatial directions, the flow with convection-diffusion competition in all directions and the flow with convection-dominant in part directions and convection-diffusion competition in part directions, which is called the interacting shear flow; the features of the three basic flows are different; their simplest conservation equations, i.e. the Euler equations, Navier-Stokes equations and diffusion parabolized NS equations, have different mathematical characteristics; there is a great disparity in domains of the three basic flows and the domains of NS equations are very small. Therefore, adopting Euler-DPNS-NS equation system to analyze and compute high Re number flows over bodies is a logical approach. There exists a mutual examined-complemented relationship of this approach with the usual one of adopting only NS equations.

主要内容如下：（1）高Re数绕流包含3种基本流动：所有方向对流占优流动、所有方向对流扩散竞争流动和部分方向对流占优部分方向对流扩散竞争流动，3个基本流动的特征彼此不同且在流场中所占领域大小彼此相差悬殊，NS方程区域很小，它们的最简单控制方程组Euler、Navier-Stokes和扩散抛物化NS方程组的数学性质彼此不同，因此利用Euler-DPNS-NS方程组体系分析计算高Re数绕流流动就是一个合乎逻辑的选择，该法与利用单一NS方程组的常用方法可以彼此检验和补充。

This article considers that the pre-schooler special-purpose school bus market potential is huge, after the analysis of the present situation of pre-schooler education in our country and pre-schooler school bus accidents in partial provinces and cities during 2005～2007. The security situation of school buses is unoptimistic. From the perspective of security, the complete form of the pre-schooler special-purpose school bus is reqestted on the basic of study of the school buses security measure in home and abroad. According to the statistical analysis of the human body size related to 3～6 year-old pre-schooler, the child chair's 6 main parameters, the passenger gate steps, and arm rest's size, as well as crossing control arm's mounting height and performance requirement have been determined. According to the present domestic and outside related standards to exports to the bus and school bus, the least quantities and most light-sized of the exports of school bus are proposed. According to the present domestic and outside standards to the request of driver's field of vision of bus and school bus, the essential requirements and inspection procedure of the field of vision of the pre-schooler special-purpose school bus are setted.

本文通过对我国学龄前儿童教育的现状和2005～2007年部分省市的学龄前儿童校车事故分析，认为学龄前儿童专用校车的市场潜力巨大，校车的安全形势不容乐观；在研究国内、外校车的安全措施基础上，从安全角度出发，对学龄前儿童专用校车提出了整车要求；根据对3～6岁学龄前儿童相关人体尺寸的统计分析，确定了学龄前儿童专用校车儿童座椅的6个主要参数、乘客门踏步和扶手的尺寸，以及横向控制臂的安装高度和性能要求；根据国内、外现行标准中对客车和校车出口的相关规定，提出了校车出口的最少数量和最小尺寸；按照国内、外现行标准中对客车和校车驾驶员的视野要求，提出了学龄前儿童专用校车驾驶员视野的基本要求和检验方法。

The results show that the friction between hoop cable and joint will cause tension redistribution in hoop and radial cable of structure,led to uneven force distribution of the same hoop cable,increase displacement of some joints and axial stress of some bars in the lattice shell, and static properties of the structure will be obviously affected,but the dynamic and stability characteristic almost will not.

计算结果表明，环索与节点间的摩擦会导致结构环索及斜索张力重分布，致使同圈索力分布不均匀，使部分网壳杆件轴向应力和节点位移增大，对结构的静力性能影响最大，而对动力和稳定性能基本没有影响。

He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州，并在2005年伊瓦尔街，公寓生活。

Droperidol （ potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道，可能是 QT 间期延长的机制。