查询词典 precision block

Using this function, the operation speed and precision of the algorithm is analyzed elementarily by the computer simulation and how to improve the precision is introduced farther as well.

并利用此功能，通过计算机仿真的方法，对四点共球法的运算量和补偿精度做了初步分析，并给出保证补偿精度的注意事项及进一步提高补偿精度的方法。

In the field of spaceborne remote sensing, a geometric collinearity equation of pushbroom sensor with the Kepler parameters of the satellite orbit and the attitudes of sensor has been developed. Testing the sensor model on a SPOT-5 imagery, the planimetric accuracy of object positioning is 83.392m on the ground. According to the orbital dynamical model and the kinematics model of satellite attitude, an algorithm of extrapolative location is developed. Testing the algorithm on CBERS-2 high resolution satellite imageries of central China, when the depth of extrapolation is 300km, the planimetric precision is 53.555m including the measurement errors as well as the modeling error over than the 568m which is the planimetric precision of systematic rectification.

航天遥感方面，利用6个卫星轨道开普勒参数和3个传感器姿态建立了推扫式卫星遥感影像的严格构像方程，经对一景SPOT-5影像实施无地面控制对地目标定位获得了83.392m的平面精度；根据遥感卫星的运动规律，提出了卫星轨道参数、传感器姿态和扫描侧视角的外推算法，用于资源二号卫星影像的外推对地目标定位，当外推深度达300km时，目标定位精度不低于50m。

Third, based on the idea of designing controller to enhance tracking precision, a new control method for improving the tracking precision and compensating the frication is advanced.

基于通过控制器设计来提高运动跟踪精度的思想，提出了基于零相位前馈和卡尔曼滤波的摩擦跟踪补偿的方法。

Imitational precision is good, which demonstrate that Visual Structure Expert Systemcan be used to imitate cable-stayed bridge construction control, under the condition that forward-calculation is used and girder cell is used to imitate the cable cell, which is capable of acquire better control precision.

施工控制各项参数实测值与理论计算值较吻合、精度较高，说明采用结构大师用正装法对斜拉桥进行施工控制仿真计算，在斜拉索模拟为梁单元的情况下，能够取得较高的控制精度。

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。

A"white light"interferent system is completed in this paper. The conventional methods, which gauge polarized mode by measuring the light intensity, is of intrinsic errors because of the limit in theory and technology. And the precision of measurement result is confined to the precision of devices used in the measurement system.

以光强测定为基础的传统测量方法，在运用到光纤及光纤器件的偏振态测量时，由于原理和技术实现方面的限制，测量结果的精度受制于测量系统中所用器件的精度，并且带有较大误差，测量精度不高。

Analyzing the precision model of intersectant measurement, then the coordinate measuring precision of various position in photoelectric target are calculated.

在分析了测量精度的数学模型后，分别计算了两种布站方式的光电靶面上不同位置点的交汇测量精度。

For precision azimuth, as in gunfire control, a double-lobe pattern (figure 3) can give great directional precision by finding the direction in which the echo "pips" for both lobes are of equal heights. This is called "lobing".

当需要精确的方位角，如指挥火炮时采用双波瓣发射，两波瓣回迹强度相等时便可获得精确的目标方位角，这被成为&波瓣法&。

Diameter precision grinding; Machinable professional and technical personnel of high precision internal diameter, inside diameter and control the depth gradient.

精密内径研磨；专业的技术人员可加工精度较高的内径、斜度与控制内径深度。

Department of Precision Instruments and Mechanology,State Key Laboratory of Precision Measurement Technology and Instrument,Tsinghua University,Beijing 100084,China

清华大学精密仪器与机械学系精密测试技术及仪器国家重点实验室，北京 100084

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切