采样数

Error analysis of digital instruments on their characteristic parts including sample/holder circuit error and analogue/digital convector error was reviewed in this paper. With the help of some examples and data tables, error origins and the synthetic method were discussed.

评价了数显仪特征部分误差分析方法，包括：采样／保持电路、模数转换单元的误差，并通过典型例子和列表数据分析了多种误差源及其综合计算方法。

The information of datagram is deposited in corresponding array cells.

将数据报的信息存放在与其网络时延相对应的结构数组元素中，在每个采样点系统只使用结构数组相应元素中的信息，实现了对数据包网络时延的仿真。

After discussing how to select the sensitivity and the complement sensitivity weight function, we summarize the concrete selection principles and give the concrete computation method of discrete controller through solving the H〓-norm equivalent discrete system on the premise of considering all the intersample information.

在控制器的计算方面，结合采样控制系统H〓控制理论，在考虑连续信号的全部信息的条件下，通过求解采样控制系统H〓范数等效离散控制系统，给出了离散控制器的具体计算方法。

The relationships of signal-to-noise ratio of sampled signal, analog filter before analog-to-digital converter and sampling rate have been discussed, the results of the discussion have instructiveness for the design of digital receivers.

该文讨论采样后信噪比与模数转换器前的模拟滤波器以及采样率之间的关系，所得结论对数字接收系统设计有指导意义。

This paper analysized the relationship between sampling frequency fs and the taps N of low pass filter in A/D transform and got a formula expression, which can give reference to the parameter design of quadrature sampling.; aiming at the wave distortion in traditional arithmetic of quadrature sampling with pulse compression, an improved algorithm has been studied and validated in Matlab and get perfecter result. In order to enlarge the detect distance of Radar, a method of part pulse compression is put forward, the realistic sense and the implement scheme is analysized.

本文分析了在正交插值前端A/D变换中采样率的选择与正交插值低通滤波器的阶数的关系，得到公式化的表达式，可为正交采样参数设计提供参考；针对传统的正交插值及脉冲压缩算法中的波形畸变提出了改进方案，并通过仿真实验得到较好的效果；为扩大雷达的探测距离，提出部分脉压的方案，详细分析了其理论意义及实现方法。

This paper systematically researched this sort of nonuniformly sampled signals'digital spectrum structure, signal-to-noise ratio , the response of D/A converter with nonuniformly sampled signals, the algorithm for estimating timing offsets, the relationship between the discrete time expression of the total energy and the continuous time expression, the estimation of the average power, the algorithm of recovery and application in designing and analyzing the digital waveform synthesizer.

本文全面系统地研究了这类周期性非均匀采样信号的数字谱结构，信噪比表达式，数模转换器对非均匀采样信号输入的响应，误差校正算法，时域与频域的能量对应关系，对功率测量的影响，内插恢复算法，以及在设计和分析数字波形合成器中的应用。

More than 3500 commonly used bisyllabic Chinese words were selected as experimental ...

实验词汇选取了常用汉语5000词中的3500余个双音节词，各读一遍并加上全部单音节音在普通环境下采样二遍作为训练样本，从中选了数百个分别在普通环境及噪声环境下采样作为识别样本。

The impact of sampling time on concentration of collected bacterium,fungus particles and mid-value diameter of particle number are studied by ANDERSEN bioparticle sampler in lab.

在室内用ANDERSEN生物粒子采样器进行了不同采样时间对采集空气细菌和真菌粒子浓度、粒数中值直径效果的研究。

The simulation of the bandgap reference using ideal resistents shows that It's precision is 16.6 ppm.The dynamic range of the sensor is increased by 2~N using multi-sample. The FPN is cancelled using CDS. The pipeline ADC has the good tradeoffs of resolution, sample rate and area.

像素阵列的扫描方式使用多采样技术可以提高传感器动态范围2~N倍，相关二次采样技术消除了像素单元之间的固定模式噪声，使用流水线式的模数转换器可以实现好的分辨率、速度和面积等的折衷。

To solve the exsisting problems in the realization of the LFM/CW radar, the thesis presents a technique for dynamically measuring the LFM/CW signals, which can accomplish the dynamic measurements of FM linearity, FM bandwidth and FM slop of the transmitted signals of LFM/CW radars. This technique creates an effective and accurate means of judging the performance of LFMCW radars. The linearity-correction techniques presented in the thesis successfully make the linearity of the transmitted signals of an actual LFM/CW radar reduce from approximately 25% to 0. 1%(or r. m. s linearity of 0.04%), better than the best results (0.22%) obtained by foreign researchers with complex linearization closed-loop in the same kind of LFM/CW radars, according to the published literatures during the last decade. In order to improve the capability of the real-time processing and range-cells management of LFM/CW radars, the principle of equivalent mixing by lacking-sampling process of band-pass real signals is proposed based on the well-proved improvedversion of sampling theorem of band-pass real signals. This principle is used to configure the range-segments processing of the beat signals of an actual LFM/CW radar. The techniques of system-background interference suppression and the beat signal's dynamic range suppression are proposed, and are realized in an actual LFM/CW radar to demonstrate their effectiveness.

针对线性调频连续波雷达实现中急待解决的技术问题，文中提出并验证了线性调频连续波信号的综合动态测试技术，可以完成对线性调频连续波雷达发射信号的扫频线性度、扫频带宽和扫频斜率的综合动态测试，为衡量实际线性调频连续波雷达的系统性能创立了精确有效的测试手段；文中建立的非实时闭环动态校正技术使一部实际的线性调频连续波雷达的发射信号（时带积3×10〓）的扫频线性度从25%改善为0.1%（方均根线性度0.04%），优于国外已公布的80年代同类雷达中采用复杂的实时闭环动态校正环路所获得的实际结果（0.22%）；为了改善线性调频连续波雷达的实时性和分辨单元数处理能力，文中发展完善了实带通信号的采样定理并给予了严格证明，并在此基础上提出了欠采样等效混频原理，将其应用于实际线性调频连续波雷达的距离分段处理中；针对线性调频连续波雷达中系统背景干扰和回波动态范围问题，创立了系统背景综合抑制技术和频域动态范围压缩技术，并将它应用于实孔线性调频连续波雷达系统中，显示出它们的有效性。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。