计算误差

In addition to reduce tracking error caused by various illumination conditions on stage, we considered only U and V values in CIE LUV color space to calculate the color differences in successive images.

此外，追踪演算法将撷取影像之RGB值转换至CIE LUV色彩空间后，仅针对其中代表色度资讯之U、V值计算影像色差，可减少舞台影像因照明改变所造成之追踪误差。

The comparison of results from mathematical model and physical model in vacuum tank for simulation of transient in air cushion surge chamber shows that the similarity laws of various quantities in model test may have influences on the dissimilarity of test results.

本文对比了含气垫式调压室的引水系统，数学模型计算和减压模型试验结果，分析了各种减压模型相似因素对试验结果的影响，认为引水系统管道内含气量、模型的缩尺效应、气室内空气的状态变化以及减压试验条件等的相似性都会造成物理模型试验结果的误差。

The motives for his introduction of an astronomical system different from that of Schall could also be two-faceted. Firstly, under the influence of the dispute between Lansberge's Copernican school and the Tyconic school in Europe, he apparently became a sympathizer of Lansberge's system. Secondly, being quite aware of the serious errors of Tychinic astronomy in some calculatoins, like a number of other Jesuit Fathers doing, Smogulecki was pobably trying to replace it with Lansberge's system, which he believed to be more exact.

至于他为什么要介绍一种不同于弟谷体系的天文学系统，原因也有两个方面：首先，他明显受到当是欧洲哥白尼和弟谷两大天文学派之间的论战的影响，并且对哥白尼学派的主张持同情态度；其次，于许多入华耶稣会士一样，穆尼阁很明白，弟谷体系在天文计算中仍然存在很大误差，所以想用他认为更加精密的兰斯伯格的天文学系统来对它加以取代。

The application of polar coordinates system in the CNC LATHE-MILLING;2. A fast particle-moving algorithm for particle-in-cell simulation of plasmas in polar coordinates system was proposed, in which the local rectangular coordinates approximation was used in the area near the position of the charged particle at every time step.

提出了一种在极坐标系下快速推进带电粒子的等离子体粒子模拟算法，该算法在每个时间步长内对带电粒子位置附近的区域采用局部直角坐标系近似，并通过坐标变换，得到粒子运动方程求解的显式格式，从而避免了极坐标系下隐式格式直接迭代求解所带来的容许误差，并提高了计算效率。

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。

At the same time, it has been calculated its truncation errors by using multi-dimensional Taylor formula and analyzed the stability by the discrete Fourier transform. At last, the conclusion of the stable difference schemes has been drawn.

同时，应用多维泰勒公式计算出它的截断误差，并在此基础上利用离散傅立叶方法分析了稳定性，得出此格式恒稳定的结论。

The results of simulating calculation show that the error of impacting point prediction by use of telemetry data is very large.

计算结果表明，仅仅利用遥测数据进行导弹落点预测有很大的误差，必须结合外测手段才能做出较为准确的落点预测

We figure out the telescope mount parameters by observing stars with CCD, and establish a measurement system, including CCD and image acquisition card to collect stars'image data, time and frequency system (made up of high accuracy counter, the GPS second signal and 10MHz frequency standard), the observing software in VC++6.0 for collecting and processing star image and the image processing software programmed with MATLAB.

建立了一套用于测定望远镜机架指向误差模型参数的系统，包括：CCD 及图像卡等硬件系统用于采集恒星图像数据；使用高精度的计数器、GPS 提供的秒信号和标准10MHz信号开发了用于观测软件的时间频率系统；使用VC++6.0 编制了包括用于计算恒星位置及图像采集和处理的观测程序，并用MATLAB编制了用于处理观测数据的程序。

Meanwhile,affected by the change of the environment tempera...

同时，由于压力传感器受环境温度的变化，对测量结果带来一定误差，温压补偿不可缺少，在设计中利用了数据融合的思想，提供了利用校验数据计算温度和压力的补偿关系的方法。

According to the theory of probability and theory of errors, an improved statistical analysis method based on the t-distribution, which can be used to calculate the radius of the Youden circle, is presented by the authors.

本文对流量标准装置比对试验中目前普遍使用的尤登分析法进行了详细的讨论，并在此基础上，根据概率论与误差理论，提出了一种基于t分布计算尤登圆半径的新方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。