波形的

Three parameters of the criterions affecting the efficiency of the gait (the number of links that form the traveling wave n, the included angle between two adjacent links α, and the phase difference of adjacent included angles β) are discussed by simulations and experiments.

通过仿真和实验讨论了相关的3个参数（组成运动波形的连杆数n、相邻连杆的夹角α和相邻夹角的相位差β）对步态效率的影响。

The output of this system is a reconstructed signal that is a good approximation of the desired waveform.

这一个系统的输出是被需要的波形的一个好近似值的一个被重建的信号。

However, with the development of electronic counterwork, thetransmission security of conventional spread-spectrum communication with fixedPseudo-Noise codes has been threatened.

然而，现在使用的扩频序列都是基本固定的伪随机序列，它的周期性和确定性与信息论对信号波形的要求相抵触，而且它可能被窃听者复制，使信息的安全性受到威胁。

This paper introduces a single-carrier system with hybrid time-frequency domain Decision Feedback Equalization, in which the short pn (Pseudo-Noise) sequence with fixed waveform replaces the cyclic prefix in the conventional Single Carrier systems with Frequency Domain Equalization, and the long PN sequences composed of several short pn sequences are employed as the channel training sequences to complete the initial estimation and tracking for fast-varying channel.

摘要该文设计了一种联合判决-反馈均衡的单载波频域均衡系统，该系统用固定波形的短pn序列取代常规SC-FDE系统中的循环前缀，并以多个短pn序列组成的长PN序列作信道训练从而解决快变信道的初始估计和跟踪问题。

In this thesis, the design scheme of a DSP-controlled inverter applied in mobile generator is presented at the beginning and then the design method of control system is mainly discussed. Equivalent output impedance model of instantaneous voltage and current closed-loop controlled inverter is established on the foundation mentioned above. How the values of LC filter, parameters of PI regulator and feedback coefficient etc. affect the external characteristic of inverter is analyzed in detail. Non-linear factor of inverter are also discussed and corresponding solutions are put forward.

本文首先给出了移动发电机DSP控制逆变模块的设计方案，着重讨论了控制系统的设计方法，在此基础上建立了电压电流瞬时值双闭环控制的逆变模块等效输出阻抗模型，对滤波器LC值、PI调节器参数和反馈系数等各项因素对逆变模块输出外特性的影响进行了详细分析，并探讨了逆变模块中非线性因素对输出波形的影响，提出了相应的解决方案。

Utilize mathematical operation of the one-chip computer and control the function, combine the digital circuit of some scale of China, have realized the producing of variable frequency sinusoidal wave and the measurement of frequency , cycle , width of pulse to the signal ,etc.

利用单片机的数学运算和控制功能，结合部分中规模数字电路，实现了一些波形的输出，及对信号的频率、周期、脉冲宽度等的测量，使用单片机使整个系统具有极为灵活的可编程性，能方便地对系统进行功能扩展与改进。

To eliminate common-mode voltage of cascaded multi-level inverter, three kinds of phase-difference SVM based on left and right bridge vectors are proposed firstly. From these three modulations, equivalent SPWM components are deduced, and the unipolarity and bipolarity of output waveforms are analyzed. 2π/3 PD-SVM (phase-difference space vector modulation) is testified be unipolar.

为消除级联型多电平逆变器的输出共模电压，首先提出了基于左、右桥臂矢量的三类相差空间矢量调制(space vector modulation，SVM)技术，数学推导出三类调制技术的等效正弦脉宽调制(sine pulse width modulation，SPWM)的调制波，并分析了其各自相电压输出波形的单、双极性，证明2π/3相差SVM必为单极性调制。

Through the exact control of welding current, the seaming figure and crystal organization can be improved, and the splash can be reduced, therefore, the mechanical property of seaming is enhanced.

通过对焊接电流波形的精细控制，可以减少焊接过程的飞溅、改善焊缝的形状和结晶的组织形态，进而使焊缝的机械性能得以大幅度的提高。

For a futher research on the natural gas and minimizing the detector,we measured the spectrum lines which may affect the detection of CH4 near 1.65μm and 1.68 μm accurately by using the TDLAS theory.Then we set up an sinal acquiring and processing system based on LABVIEW,which can aquire and filter the digital signal and an interfix arithmetic is also used to get the final result.

本论文以近红外二极管激光吸收光谱技术为基础，在1.65μm和1.68μm附近对乙烷的谱线进行了准确测量，分析了乙烷谱线对甲烷测量的影响，编写了基于LabVIEW的数据采集及处理分析系统，利用该系统实现了对探测信号的采集、滤波以及对波形的相关运算并得出最终结果。

Through the combination of the soft and hardware ,a multichannel analogy signal acquisition system is designed.

通过软、硬件技术的结合，实现了对多路模拟信号的采集和多种波形的输出，充分发挥了虚拟仪器的优势。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。