乘法

The optimum experimental condition for simultaneous UVspectrophotometric determination of the contents of aspirin, phenacetin and caffeine in aspirin compound tablets and the basic principle

本文研究了复方阿斯匹林片中阿斯匹林、那西丁和咖啡因含量同时测定的紫外分光光度法的最佳实验条件，并简述偏最小二乘法多组分同时测定中的基本原理和应用。

It considered three types of distortions, i.e., pincushion distortion, S distortion and image offset as a whole, and fitted the composite distortion of the images by the Nth order polynomial, and then obtained the optimum image correction coefficient by the least squares approach.

该方法统一考虑C臂投影图像的3种类型的失真——针垫失真、S型扭曲、图像偏移，利用N阶多项式拟合图像的复合失真，然后利用最小二乘法求解最优化校正系数，从而具有所需标记点数量较少，校正区域连续，步骤简单，易于在线使用的优点。

The planarity and the average degree of the bond of the initiators are discussed by the full-matrix least-squares on F〓.

通过最小二乘法计算结果，讨论了分子的平面性及键长平均化程度，诠释了分子内电荷转移的趋势及有可能的引发机理。

This paper presents the cumulative-sum is a new data processing methods, It is a similar effect with the least squares method, it is more than simple arithmetic, Based on photoelectric effect measured Planck constant example, Introduced the methods for solving a linear equation with cumulative-sum method.

本文介绍的累积法是一种新颖的数据处理方法，它是一种效果与最小二乘法相同，比它更简明的运算方法，本文以光电效应法测普朗克常数实验为例，介绍了用普通累积法解一元线性方程的方法。

In the process of solving this problem, we established a mathematical model of graphics coordinate transformation, using the least square method to determine the target on the properties of the geometric center of the image in the camera image plane coordinates.

在处理这个问题的过程中偶们建立了图形坐标变换的数学模型，采用最小二乘法来确定靶标上物的几何中心在相机像平面的像坐标。

In the process of solving this problem we established a mathematical model of graphics coordinate transformation, using the least square method to determine the target on the properties of the geometric center of the camera image plane of the image coordinates.

在解决这个问题的过程中我们建立了图形坐标变换的数学模型，采用最小二乘法来确定靶标上物的几何中心在相机像平面的像坐标。

For the image of 512×512,the time of two-dimensional FFT by fixed DSP is 17.7ms, the gross time of float point multiplication and division by float point DSP is 32.51ms, according to above time, the load of every DSP is calculated.

对于512×512大小的图像，定点DSP完成二维FFT的时间为17.7ms，浮点DSP完成浮点数据乘法和除法的时间总共为32.5ms，据此计算了各个DSP的工作负荷。

In order to solve this problem,replacing polar coordinates and replacing multiply by addition and shift operator to speed up the process of Hough transform.

为解决这个问题，提出一种通过改换坐标系、用加法和移位运算代替乘法的新思想，大幅加快了Hough变换的速度。

It is mainly caused by Sine and Cosine functions using in polar coordinates which have non-linear character,accordingly multiply is inevitable.

这主要是因为极坐标所用到的正弦函数和余弦函数具有非线性特性，使将来运算基本单元的乘法不可避免。

By applying these two tools,we mainly discuss the problems as follows:1 Perturbation identities for the generalized polar decomposition:By applying singular value decomposition, we study the perturbation bounds of the generalized polar decomposition under unitary invariant norms when A is perturbed by addition or multiplication,respectively and give our bounds in identities.2 A class of new unitary invariant metrics: This paper generalized a class of new unitarily invariant metrics and give the upper-bounds and lower-bounds by C-S decomposition.

利用这两个强有力的工具，本文主要讨论了如下问题：1 矩阵广义极分解的扰动等式：利用奇异值分解，本文分别讨论了加法扰动和乘法扰动下矩阵广义极分解在任意酉不变范数下的扰动界，并首次以恒等式的形式给出了酉极因子和半正定因子的扰动界。2 一类新的酉不变度量：本文推广了文[22] 中的结论，定义了一类新的酉不变度量。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。