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gravity center method
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  重心法
     Spatial Resolution of the Measurement of the Location of A Star Carried out by Means of the Gravity Center Method When A CCD Is Used During the Observation and the Effects of the Flat Correction, Sky Background and Noise——A Method of Astronomica
     在CCD观测中用重心法测量恒星位置的空间分辨率和平场改正、天空背景及噪声的影响—CCD天文测量方法(Ⅱ)
短句来源
     The estimation of the accuracy of measuring the position of a stellar image by making 'use of the' gravity center method is expounded in this present article by applying the knowledge of probability and mathematical statistics. And a conclusion is drawn from the exposition that the accuracy of the measurement is inversely proportional to the square root of the overall luminosity readings of the pixels of the stellar image.
     本文应用概率与数理统计知识阐述了重心法测量星像位置时的精度估计,得出测量的精度与星像的象素的总光度读数的平方根成反比的结论。
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  “gravity center method”译为未确定词的双语例句
     The image is received by the collimator of long focus and area CCD camera. The location and size of the optimum image were measured effectively by using dynamic scanning and gravity center method. Therefore,the accurate measurements of the focus of aerial camera lens and the location of the real image plane can be realized in the relative accuracies of 0.1% and 100% respectively.
     系统采用长焦距准直物镜和CCD摄像头接收图像,利用动态扫描、灰度质心法和计算机处理技术,有效地确定最佳图像的位置和尺寸,从而能够实现航空相机镜头焦距的精确测量(误差为0.1%)和实际成像面位置是否正确的精确判断(精确度为100%)。
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  相似匹配句对
     Control of the Automobile Gravity Center
     汽车重心位置的控制
短句来源
     Simplified Mathematical Calculation by Center of Gravity
     利用“重心”简化数学计算
短句来源
     Method for determining the center of gravity of articulated loader
     铰接式装载机重心位置的确定方法
短句来源
     Image Index Method Based on Weight and Gravity Center
     基于重量分布与重心位置的图像索引方法
短句来源
     The Calculating Method of the Weight and Center of Gravity of Exicvators Boom
     挖掘机动臂重量及重心位置的计算方法
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When an array device such as a CCD, Reticon, etc. is used to observe a star, the gravity center of luminosity of the image of the star can be found as the center of the image by means of the information provided by the luminosity readings of the pixels. The estimation of the accuracy of measuring the position of a stellar image by making 'use of the' gravity center method is expounded in this present article by applying the knowledge of probability and mathematical statistics. And a conclusion is drawn...

When an array device such as a CCD, Reticon, etc. is used to observe a star, the gravity center of luminosity of the image of the star can be found as the center of the image by means of the information provided by the luminosity readings of the pixels. The estimation of the accuracy of measuring the position of a stellar image by making 'use of the' gravity center method is expounded in this present article by applying the knowledge of probability and mathematical statistics. And a conclusion is drawn from the exposition that the accuracy of the measurement is inversely proportional to the square root of the overall luminosity readings of the pixels of the stellar image.

当用CCD和Reticon等列阵器件观测恒星时,可利用每个象素的光度读数提供的信息,求出星像的光度重心作为星像的中心。本文应用概率与数理统计知识阐述了重心法测量星像位置时的精度估计,得出测量的精度与星像的象素的总光度读数的平方根成反比的结论。

The effects of the sky background, flat correction and noise on the measurement of the location of a star by means of the gravity center method centering by means of the method of weighten center arc theoretically analysed in this paper. The corresponding error formulas are also presented quantitatively. According to the characteristics of the discreteness of CCD images, the relation between the resolution and the size of a stellar image is derived, thereby proving that the accuracy of the...

The effects of the sky background, flat correction and noise on the measurement of the location of a star by means of the gravity center method centering by means of the method of weighten center arc theoretically analysed in this paper. The corresponding error formulas are also presented quantitatively. According to the characteristics of the discreteness of CCD images, the relation between the resolution and the size of a stellar image is derived, thereby proving that the accuracy of the measurement of the stellar image by means of the gravity center method may reach to a few percent of a pixel.The measuring error of the spatial resolution with the No. 1 CCD receiving system of theYunnan Observatory is less than 0.1 arc secnod according to a conversative estimation.

本文从理论上分析了天空背景、平场改正和噪声对重心法测量恒星位置的影响,定量地给出了相应的误差公式。针对CCD图象的离散特点,推出了分辨率和星象大小的关系,从而证明了重心法的测量精度可以达到百分之几象元。对云台一号CCD进行保守估计得到误差小于0.1角秒。

With the developing of the market economy, synthetic evaluation has become an important means for macroscopic management. But there are two difficulties: the first one is that the ordering results calculated by the common method such as the fuzzy distance measure method are in contradiction with the classification results by the fuzzy transformation; the second is how to determine the classification reference marks of evaluation indexes. This paper advanced a mathematics model of synchronizing the classification...

With the developing of the market economy, synthetic evaluation has become an important means for macroscopic management. But there are two difficulties: the first one is that the ordering results calculated by the common method such as the fuzzy distance measure method are in contradiction with the classification results by the fuzzy transformation; the second is how to determine the classification reference marks of evaluation indexes. This paper advanced a mathematics model of synchronizing the classification with the ordering to answer the first question. For solving the second problem, “half normal distribution classification method”, “two way normal distribution classification method” and “gravity center method” were proposed. These methods made a foundation of scientific classification.

综合评价是各类宏观管理的重要手段,但是存在两个困难:首先,用通常方法(例如距离测度法)计算的排序结果有时和模糊综合的分级结果相矛盾;其次,如何决定各评价指标的分级参考点。该文提出了一种分级和排序同步的数学模型,用以回答第一个问题。为了解决第二个问题,提出了半正态法,双边正态法和重心法。这些方法构成了科学分级的基础。

 
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