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neighbor point
相关语句
  相似匹配句对
     Structure of Neighbor of a Planar Point on a Surface
     关于曲面上平点邻近的结构
短句来源
     Extreme Point of f(x) and f~n(x)
     连续函数f(x)与{f(x)}~n的极值
短句来源
     HOT POINT
     数位热点
短句来源
     Nearest neighbor query finds spatial object nearest to given point.
     空间连接查询往往涉及对两个或两个以上图层中空间对象之间的操作。
短句来源
     On the Neighbor-integrity of Graphs
     关于图的邻域完整度
短句来源
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The grooves or ridges of the three edges are curved to meet the neighbor point.
      


For speeding up and time-saving in the calculation of potential energy curve using quantum chemical Ab initio method some efficient algorithm techniques are reported taken the systems Zn_2~+ and Zn_2~(32+) as an example.The molecular integrals in the points which belong to two curves respectively and have the same geometry configurations despite possible difference for their spin multiple or electron number can be evaluated once enough with the speed of computation increasing by several times.During the...

For speeding up and time-saving in the calculation of potential energy curve using quantum chemical Ab initio method some efficient algorithm techniques are reported taken the systems Zn_2~+ and Zn_2~(32+) as an example.The molecular integrals in the points which belong to two curves respectively and have the same geometry configurations despite possible difference for their spin multiple or electron number can be evaluated once enough with the speed of computation increasing by several times.During the change of the whole geometry configuration the molecular integrals of the kept still local needn't be evaluated repeatedly.The difference of the corresponding two-electron integrals between two neighbor points and its distribution are exposed and it is proposed that most of the two-electron integrals with four different indices would be used each other for neighbor points.After the similarity of the wave funcfion properties for neighbor points is researched quantitatively, it is shown that the acquired wave function is a good approximation for neighbor points and can be used as their trial one with the necessary iteration number to be reduced by about 1/6 in SCF procedure.These techniques are also useful for the calculation of potential energy surface using Ab initio method.

本文以Zn_2~+与Zn_2~(2+)体系势能曲线从头计算法研究为例,探讨了提高计算速度的若干有效算法。对两个体系有同样构型r_(Z_n—Z_n)的那些点,可使用同样的分子积分,还可用于不同自旋多重度的体系,使计算速度提高若干倍。分析邻近构型波函数相似特点,将已自洽的某一构型波函数作为邻近构型的初探波函数,使叠代次数下降到通常算法的六分之一左右,且有利于避免振荡与假收敛。从邻近构型双电子积分差值分布,认为绝大多数运算复杂的四指标不同的双电子积分可借用邻近构型的计算结果,不影响计算精度。在整个构型改变中,总有不变的局部结构,它们内部的双电子积分只要计算一次,供整条曲线上各点使用。

Printed Chinese character recognition is an important subject of Chinese information processing. Because there are different kinds disturbances,preprocessing must be carried out before a Chinese character image can be recognized.We present a preprocessing method,which includes binary processing,smoo thprocessing,line segmentation,character segmentation and normalization. In the key step of binary processing,we propose a threshold-selecting method.First,we work out the gray statistical histogram of the Chinese...

Printed Chinese character recognition is an important subject of Chinese information processing. Because there are different kinds disturbances,preprocessing must be carried out before a Chinese character image can be recognized.We present a preprocessing method,which includes binary processing,smoo thprocessing,line segmentation,character segmentation and normalization. In the key step of binary processing,we propose a threshold-selecting method.First,we work out the gray statistical histogram of the Chinese character image,then smooth the histogram repeatedly by using the weighted near neighbor points until two global peak points are obtained. Find the lowest point of the two peak points and take it as the threshold of the Chinese character image;We used this preprocessing method in printed Chinese character recognition in which neural network technology is used,and got a satisfactory result.

印刷体汉字识别是中文信息处理技术的主要问题,由于各种干扰因素的存在,在对汉字进行识别之前,必须进行预处理,预处理方法主要包括二值化处理、平滑处理、行、字切分及规格化处理。在关键步骤二值化处理中,首先做出汉字图象的灰度直方图,然后采用近邻加权平均的方法对该直方图进行迭代平滑处理,直至最终获取2个全局峰值,取2个峰值间的最低点即可作为所选阈值。该方法用于作者研制的ANS印刷体汉字识别方法中,取得了满意效果。

The paper presents an algorithm to find an nearest neighbor points for a set of planar pointson mesh-connived computers,and analpes its correctness and time complexity.

给出了在网格结构的计算机上求平面点集的所有最近邻近点的一个算法,分析了算法的正确性和时间复杂性.

 
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