查询词典 sampling error

In order to reduce the systematic error introduced by non-integer-period sampling, the spectrum correction methods were studied.

针对非整周期采样误差影响频率计算的精度的问题，研究了频谱校正方法。

This makes the feasibility of mechanical tele-control through Internet. For the distortion of information caused by uncertain net delay and treatment of sampling information treater, the static error is induced.

但是由于网络传输环节的不确定性时延和采样信息处理器的数据报使用策略使传输后的控制信号发生变形，从而使系统存在稳态误差。

A certain truncation error with higher sampling ferquency and/or smaller control horizon can be used to get high performance of control.

改进后的DMC允许模型向量存在一定的截断误差，从而能以较小的建模时域或较高的采样频率实现高性能的DMC。

The high vertical resolution is achieved at a larger sampling distance when interpolation algorithm is adopted to reconstruct the 3D profile and the conicoid fitting technique is used to calibrate for the system error in the data processing.

在数据处理上，采用了内插值三维重构算法，以及二次曲面拟合的系统误差校正算法，可以在较大的采样间距下获取较高的测量精度。

The discrete mathematical models of the roundness and cylindricity EST are established; the mathematical models of the generating line straightness, axis straightness, coaxality, circular run—out and total run—out error of the revolution workpiece are put forward and established first based on the EST; the method about how to sample and to process sampling data are given when these models are applied to measure workpleces.

其主要内容是：针对长期以来国内对回转误差运动的有关定义的争论，对回转误差运动的本质进行了讨论，进一步明确了静心与静轴，动心与动轴的概念，并对此进行了数学推导，给出了相应的数学模型；统一了&平动说&和&瞬心说&关于回转轴线的定义，指出了两种学说各自的力学基础和它们的一致性。

As a differential detection is used between the intercarrier, the proposed algorithm overcome the high sensitivity to timing error of conventional algorithm and is robust to multi-path. The effect of sample frequency offset can't be ignored in a continuous OFDM system of a large number of subcarriers. The estimation precision of the conventional algorithm is low and the realization is complex. A joint estimation of sample frequency offset and fine frequency offset based on difference operation is proposed. As averaging use a large number of samples in a maximum likelihood algorithm, the estimation precision is very high. The use of difference operation cancel the effect of carrier frequency offset, and the proposed sampling frequency estimation algorithm is robust to carrier frequency offset.

最后，本文对连续系统中的采样频率和载波频率精同步技术进行较为深入的研究，由于子载波数目大的连续OFDM传输系统中，采样频率偏差不可忽视，以往的采样频率估计方法精度低、实现复杂，因此本文提出了一种基于差分处理的采样频率偏差和精载波频率偏差联合估计算法，利用了最大似然算法进行采样频率偏差的估计，由于采用了差分处理方法，消除了载波频率偏差对采样频率偏差估计的影响，采用的最大似然算法对大量样点进行平均化处理，所以，相对以往算法，提出的联合算法估计精度高，而且采样频率偏差估计对载波频率偏差具有鲁棒性。

The fast Fourier transform will bring on higher error under nonsynchronous sampling and truncated non-integral period, thus more accurate interharmonic parameter values cannot be obtained.

快速傅里叶变换在非同步采样和非整数周期截断的情况下存在较大误差，无法获得较精确的间谐波参数值。

In view of this problem,a parameter extremum optimization model is developed,in which such error factors as the decaying DC components,nonsynchronous sampling and harmonics are precisely depicted.A new measuring method based on the hybrid genetic algorithmis developed to use this model for finding accurate power system parameters such as the amplitude,phase,frequency and harmonics.

针对这一问题，建立了电力参数极值优化模型，同时对衰减直流分量、非同步采样及谐波等多个误差参数加以精确表示，利用混合遗传算法对该模型进行求解，可得到准确的系统幅值、相位、频率及谐波等电力参数。

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.

提出以内外桶温差导致的量热系统温度变化的速度对主期测量时间进行积分的冷却校正计算模型。

From the aspect of electrical power system structure, the performance of signal sampling installment and the electromagnetic compatibility, discussed the primary factors which influence protective device reliability and the sensitive, proposed the problem of guaranteed its reliability and its sensitivity that should be adverted, had determined the active power selection selective leakage protection hardware architecture, the software computational method, and the method through the software proofread system angular error, have developed the intelligence protection system based on the AVR high speed MCU and the CAN bus.

从电力系统结构、信号采样装置性能和电磁兼容性的角度出发，论述了影响保护装置可靠性和灵敏性的主要因素，提出了保证其可靠性和灵敏性应注意的问题，确定了有功功率选线的选择性漏电保护的硬件结构、软件计算方法，和通过软件校正系统综合角误差的方法，研制了基于AVR高速单片机和CAN总线的智能保护系统。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样