波形的

In this paper, based on the former researches, satellite altimetry is used to monitor the water level changes of seven inland lakes in China. The contents and conclusions of this research are as following:1. Based on the characteristics of altimetric waveform, methods of improved waveform retracking are put forward. DEM or DTM model is introduced as the standard to estimate the retracked range for waveform retracking.

本文在借鉴以往研究成果的基础上，利用卫星测高技术对我国7个内陆湖泊的水位变化进行了监测研究，主要研究内容及结论如下：(1)在对原有波形重定方法深入研究的基础上对其进行了改进，使用DEM或DTM模型作为波形重定后改正结果的选择标准，并利用Fortran语言设计了波形重定软件。

The instructive conclusion was: 1 under the vertical loading, the shear-lag effect was produced badly, more severer under concentrated loading than under uniform loading .2 the longitudinal bending deformation of the beam flange was true of the imitating plane assumption of deformation . 3 the width length ratio was confirmed as the first factor working on the shear-lag effect among all the geometric parameters;4 the shear-lag coefficient of simple-supported box-girder was severer than the continuous box-girder, the shear-lag effect in the inner supported section of continuous beam was much more severer, we need paying more attention for it in designing. 5 the non-liner characteristics of material deformation have littlie influence on shear-lag effect in BGCW. 6 the experiential calculating formulation and calculating diagram for the effective flange width was raised with the only factor of the width-span ratio., but the primary location of axis of bending moments should not be changed while calculating the inertial moment .

研究认为：1室内模型试验和空间有限元分析结果均表明波形钢腹板组合箱梁在竖向荷载作用下，翼板出现了典型的纵向应力剪滞效应。2在竖向荷载作用下，截面高度上各点纵向正应变分布认为可符合"拟平截面假定"，以此作为波形钢腹板组合箱梁抗弯计算的基本假定。3箱梁宽跨比是影响波形钢腹板组合箱梁翼板剪滞效应的主要因素。4连续波形钢腹板组合箱梁的翼板剪滞系数大于简支梁，且连续箱梁内支点截面翼板剪滞效应相当严重，对此需十分重视。5当混凝土翼板受力由弹性阶段进入弹塑性阶段时，材料的非线性特性对翼板的剪滞效应影响甚微。6提出了根据组合箱梁的宽跨比参数来计算翼板有效宽度比的经验公式和计算图表，但箱梁截面抗弯惯性矩的计算不应改变原先的截面中和轴位置。

It is based on the method of modeling mobile voice channel and system identification is made so that the waveform samples are designed in frequency domain with less signal distortion.Then the waveform codebook is gotten by a genetic algorithm which has the maximum Euclidean distance.Thus,the modulation and demodulation are equivalent to the mapping from index to waveforms and from waveforms to index.

提出了对移动话音业务信道建模的思想，通过系统辨识获得模型的频率响应特性，在波形畸变较小的频带范围设计波形频谱，采用遗传算法在时域样本空间全局寻优获得欧几里德距离最大的波形码本，通过码本索引值和波形矢量的映射和解映射来实现数据的调制和解调。

Based on direct digital synthesizer technology and digital orthogonal upconverter AD9857,an arbitrary waveform synthesizer is realized,which can generate arbitrary waveform in the frequency domain of 6~60MHz.

介绍了一种基于直接数字频率合成技术、采用数字正交上变频器AD9857实现的任意波形合成器，该波形合成器可以在6~60 MHz范围内合成任意波形。

A direct digital synthesis technology, based on large capacity synchronous dynamic random access memory, was used, in which the table of arbitrary waveform amplitude generated by CPU according to testing requirement was stored, and FPGA outputs the amplitudes to D/A converter.

采用基于大容量同步动态随机存储器任意波形表的直接数字合成技术，由CPU根据检测需求生成任意波形幅值表，存储到SDRAM中，现场可编程门阵列器件将波形数据输出到D/A转换器，经滤波、放大后驱动涡流探头。

Verifies the voltage wave, electrical current vuive and output power wave of asteroidal magneto, and the veracity of parameters by a series of experiments. The experimental result demonstrates that the error is less than 10% between theoretic value and actual value.

3通过一系列实验验证了星形磁电机空载电压波形、电流波形、短路电流倍数、输出功率等波形和参数的准确性，实验结果表明，理论与实测值相差不到10％。

By applying the drop testing machine to automatically simulate half-sine pulse,the calculating model was set up to describe the course of half-sine pulse generated by the rubber waveform generator,based on the basic mechanical principle of half-sine pulse generation and non-linear of the rubber waveform generation in the condition of quasi-static compress.

采用跌落式冲击试验机机械模拟半正弦冲击波，以半正弦冲击波形产生的基本力学原理以及橡胶波形发生器在准静态压缩情况下的材料非线性为基础，建立描述橡胶波形发生器生成半正弦冲击波过程的理论计算模型。

When towed fish is towed in the direction perpendicular with the lineation of hinge line of sand waves, the wave length and dipping angles, can be determined from the sonar image at nadir. Under the circumstance, whether the shape of the sand wave is symmetric or not can be shown and the main direction of sediment transportation can be pointed out.

依据相对大尺度的砂波，在拖鱼指向与砂波脊线成大角度斜交时，该波形可在拖鱼正下方影像显示，并且可以辨识该波长与坡倾角，以判定此砂波为对称波形，或非对称波形，来指示沉积物的净搬运方向。

DG1000 series function / the interface of aleatoric and undee generator and DG2000 and DG3000 series are unified, modulation source is received outside, source of fiducial 10MHz clock, spark outside input, in-house 10MHz clock is outputted; Support equipment of storage of USB of Plug and Play, can store through USB storage equipment, read take weaveform to configure parameter and user to define aleatoric weaveform oneself, and undertake software upgrades.

DG1000系列函数/任意波形发生器的接口与DG2000以及DG3000系列统一，外接调制源，基准10MHz时钟源，外触发输入，内部10MHz时钟输出；撑持即插即用USB存储行动措施，并可经由过程USB存储行动措施存储、读取波形设置装备摆设参数及用户自界说任意波形，以及进行软件进级。

And a retiming scheme based on the above method is also presented to optimize the timing behavior of sequential circuits. Also from waveform polynomials of sequential circuits, a precise clocking method based on multiple-period sensitization is presented.

为了适应超深亚微米电路测试的要求，本文建立了一种新的基于布尔过程论的逻辑级噪声预测模型，用波形多项式描述的同时发生的跳变数来预测噪声大小，并生成能产生最大跳变数目的输入波形；然后同基于波形敏化的长敏化通路选择法相结合，形成一种能产生最大噪声效应的敏化测试波形生成新方法。

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。