sampling error

Second, the estimated value of the parameter is null and void, that is, there are other ways to produce a smaller sampling error of the estimated value.

第二，对参数的估计值是无效的，即还有其他方法能产生具有较小抽样误差的估计值。

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The margin of sampling error for all adults was plus or minus 3 percentage points.

调查结果误差为上下三个百分点.

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Would different sample size for different questions affect the sampling error?

个别题目的样本数目会否影响抽样误差?

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The Gauss width of focal spot which is too small results in the sampling error while using CCD as the centroid detecting device of Shack-Hartmann Wavefront Sensor ( SHWS) in Adaptive Optics ( AO) system.

自适应光学系统中采用CCD作为哈特曼波前传感器的光斑质心位置探测器时，由于光斑的高斯宽度较小会带来大采样误差。

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The sampling error was made feeble though the slide average method. By the way of mathematic statistic analyses, the function medal of cultivated land income and standard grains in the same area of uniform land economic index districts was got.

采用了滑动平均法弱化了采样误差，通过数学统计分析，得到了生态区相同土地经济系数等值区内耕地收益与标准粮之间的函数模型。

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This paper tries to use synchronized sampling serial and error item to express non-synchronized sampling serial, then advances a iterative formula.

本文试图用同步取样序列和一个误差项来表示非同步取样序列，并由此采用了一个基于FFT的迭代公式。

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For smaller subgroups, the margin of sampling error is larger.

原始团体越小,样本得出结论的误差越大.

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The correlation degrees between subjects in multi-subject sampling survey are discussed in three cases, in view of every condition, the relevant sample orgainzation and the calculating methods of target variable, sample size and sample error are put forward in this thesis.

本文将多主题抽样调查中各主题间的相关程度分成三类进行了讨论，针对每一种情况，提出了相应的抽样组织形式，目标量的估计方法，抽样单位数和抽样误差的控制方法。

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In this paper, the truncated error of trapezium method ( a classical algorithm) is analyzed under ideal state of electrical power parameters, a sin function, when sampling digital measurement and the relationship between the error and the amount of sampling points is offered.

对电力参数的理想情况（标准正弦量）采样数字化测量的典型算法（梯形法）的截断误差进行了分析，给出了误差与采样点数的关系；

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It can't avoid that the problem of transforming a continue signal into a discrete digital series in the process of design a digitalized signal sampling system, so it is importance to discuss the sampling error for Hi-Fi digital sampling system.

连续信号的离散化，是设计数字化信号采集系统时不可避免要遇到的问题。因此，采样误差的讨论对高保真的信号采集具有重要意义。

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From error of trapezia quadrature and hardware design of calorimeter, we introduce sampling factor to obtain factual temperature and adopt shorter interval to perform cooling emendation.

从梯形法求解定积分的误差出发，结合恒温式氧弹仪硬件电路设计的具体情况，引入采样因子来准确获得测量过程的实际温度，并采用较小的时间间隔进行冷却校正的计算。

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Therefor, people adopts exchange sample modus, win reduce sampling error.

为此，人们采取轮换样本的做法，来减少代表性误差。

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This paper presents the analytical method of terrestrial photogrammetry in profile surveying. It takes the error effect of exterior orientation elements into consideration, and realizes the Variable interval sampling of profile points.

本文介绍了解析法地面摄影测量断面图的方法，它顾及了外方位元素误差影响，同时实现了断面点可变间距采样。

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The designed control circuit consists of two components: isolating and sampling circuit used for sampling output voltage and isolating primary and secondary of the converter; type 2 error amplifier, designing compensated circuit for error amplifier to stabilize feedback circuit system.

设计的控制电路由两部分组成：隔离、取样电路，用来采样输出电压并实现变换器初、次级电气隔离；2型误差放大器，设计补偿电路使反馈电路系统稳定。

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The sampling error for the poll is plus or minus 3 percentage points.

这份民调的误差在正负3个百分点左右.

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Figures of sampling error are calculated at 95 % confidence level with respect to whole sample.

^有关误差数字均以95%置信水平及整体样本计算.

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Therefore, sampling workers must make error analysis before sampling, adjust the sampling equipment regularly, check the airtight of sampling system, adjust flow regularly and grasp the setting of programme.

为此，采样人员在采样前必须进行误差分析，定期校准采样器，对采样系统进行气密性检查，按时校准流量，掌握程序的设置方法。

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Q: Would different sample size for different questions affect the sampling error?

问: 个别题目的样本数目会否影响抽样误差?

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An Analytic estimative formula of FFT leakage error for non-integral period sampling is analyzed and derived and in the case of the input signal including fundamental wave and higher harmonics, a new calculating method of realizing the self-adaptive Integral period sampling with FFT iterative calculation is obtained.

分析推导了非整周期采样时FFT泄漏误差的解析估计公式，得出了在输入信号含基波和高次谐波分量的情况下，利用FFT迭代计算来实现自适应整周期采样的一种新算法。

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In the simulation, constellation, Bit-Error-Rate ( BER) and Signal-to-Noise Ratio ( SNR) performance degradation are analyzed taking into account the effect of sampling frequency offset.

经过仿真，从星座图、误码率（Bit-Error-Rate，BER）及信噪比（Signal-to-Noise Ratio，SNR）损失等角度对采样频率偏差的影响做了揭示和验证。

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