模数的

The content of this course includes: fundamentals of logic algebra analysis and design of the combinational logic circuit and sequence circuit common applications of the combinational logic circuit and sequence circuit programmable logic devices Hardware Design Description Language A/D (Analog/Digital) and D/A conversion.

课程的主要内容有：逻辑代数基础、组合逻辑电路及时序电路分析与设计、常用中规模组合逻辑及时序逻辑电路应用、可编程逻辑器件、硬件设计描述语言VHDL、数模、模数转换等。

To keep away from digital distortion caused by analog conversion,"Boutique Recording" applies APOGEE Analog to Digital Converter System in pre-recording, adopts Hi-End Prism Sound Digital to Analog Converter System during post mix and master disposal processes. In a word,"Boutique Recording" minimizes the distortion rate, and maintains the unique spirit of analog music.

为避免后期缩混时过多数字设备所造成的数码味，录音师坚持在前期录音与母带处理过程中使用传奇的模拟设备，在现场录音的同时进行立体声混音工作，为了避免模数转换时所造成的数字失真，达人艺典在前期录音中采用APOGEE模数转换系统，后期缩混及母带制作采用顶级HI-END厂牌Prism Sound数模转换系统，将失真率减到最低，保持独有的模拟音乐味道。

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。

By using the modal superposition method for the dynamic responses calculation of the linear oscillation system, a judging indictor in the energy norm form is given to determine the number of dominant modes on mode truncation .

针对用模态叠加法计算结构线性振动系统的响应，作模态截断的截尾模态阶数的取值，给出了能量范数形式的判断指标。

By using the modal superposition method for the dynamic responses calculation of the linear oscillation system, a judging indictor in the energy norm form is given to determine the number of dominant modes on mode truncation.

针对用模态叠加法计算结构线性振动系统的响应，作模态截断的截尾模态阶数的取值，给出了能量范数形式的判断指标。用于小湾拱坝结构的动力分析表明，需取 10阶以上的模态进行叠加

Put forward a new method by transforming the second-order hyperbolic equationinto a first-order system of equations and derived the H_0~1 -norm and the L~2 -norm error estimates.

12提出一种新方法，通过转化双曲型方程中二阶时间导数项得到关于一阶时间导数的耦合方程组，然后进行离散，得到一个两层交替方向有限元格式，并得到H_0~1-模和L~2-模误差估计。

This paper illustrates the processing art method of the hard gear wheel with big modulus in accordance with the mill wheel machine equipment in our factory and analyzed the big modulus gear wheel .

针对我厂现有磨齿机的设备和对特大模数齿轮参数分析制定出特大模数硬齿轮加工工艺方法。

In chapter 4, we define the projective dimension of flat modules, use it to characterize many rings, and the relations between cotorsion modules and the projective dimension of flat modules are also given.

在第四章中，我们定义了平坦模的投射维数，用它刻划了一些环，并讨论了Cotorsion模和严坦模的投射维数的关系。

This paper presents the Proteus software under a micro-controller board simulation method, and gives a digital-to-analog converter, analog-to-digital conversion、ISP programming、numeral clock 、real-time digital clock ﹑ Lantern experimental keyboard ﹑lattice LED ﹑ Relay, voice and other tenets of the hardware modules and software flow chart.

论文编号：JD607 包括开题报告，任务书，外文翻译，论文字数：10522，页数：46本文介绍了在Proteus软件下实现了一套单片机实验板的仿真方法，并给出了数模转换、模数转换﹑ISP编程﹑数字钟﹑实时时钟、键盘﹑彩灯实验﹑点阵LED显示屏﹑继电器、语音等模块的硬件原理及软件流程图。

This paper is finished based upon a part of the project ,which is the design of Delta-Sigma ADC in a high precision electrical meter chip .

本论文主要基于&一种高精度脉冲输出的电能计量集成电路&项目中关于Delta-Sigma模数转换器的设计部分，论文中在对Delta-Sigma模数转换器原理进行深入理解的基础上，提出了一种高精度Delta-Sigma模数转换器的解决方案，并运用于以上项目中取得很好的效果。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。