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The purpose of this paper is to present some ways of transformation based on decomposition of trigonometric reasoned formula of integral calculus, and furthermore, it can promote student s ability of integral calculation and use of recursion serial.

结合积分的计算,分析积分递推式的化归问题,三角有理式在积分中的拆分法的化归问题,有利于促进学生对于积分的计算以及递推序列的巧妙应用等数学能力的培养。

Dirac equation can be separated into an angular equation and a radial equation with the help of separation variable.

通过分离变量得到Dirac方程相应的角向方程和径向方程,得出了用广义连带勒让德多项式表示的归一化角向波函数和用合流超几何函数表示的归一化径向波函数;获得了精确的束缚态能谱方程并对结果作适当讨论与结论。

First, the proposed scheme uses contourlet transform to extract multidirectional and multiscale texture information, and then obtains the feature points invariant to the affine transformation from the low and middle directional subbands by Harris-Affine detector. Second, the feature regions are adaptively computed by the feature scale of the local structure and normalized by U transform. The watermarking is embedded adaptively in those characteristic regions which are normalized. Finally, by vector quantization, several copies of the watermark are embedded into the no overlapped local feature regions in different directional subbands.

首先,用Contourlet变换提取出多尺度、多方向的纹理信息;再用Harris-Affine检测算子从变换域的中、低频方向子带中提取出仿射不变特征点,结合自适应局部结构的特征尺度确定特征区域,并用U变换对其归一化处理,水印就自适应地嵌入到归一化后的区域中;水印嵌入采纳矢量量化的策略,将水印信息重复嵌入到不同方向子带、多个不相交的局部仿射不变特征区域。

The total and of the pitot tube were measured when the opening of the regulating valve was changed with keeping the flowrate fixed as well as unchanged the opening of the regulating valve with invariable flowrate. Then, the dynamic pressure signals were analysed with the method of PSD after computed and normalized and a better result of frequency-domain distribution was obtained. In addition, the average energy was defined and used for the analyzing of disturbance signals of regulation valve.

首先利用皮托管对相同流量不同开度及相同开度不同流量下的总压及静压信号进行测量,然后经过计算得到动压信号并进行归一化处理;其次,对归一化处理后的动压信号进行功率谱分析,取得了较好的频域分布结果;同时定义了信号的平均能量,并将其应用到了调节阀扰动信号的分析中。

With rotational invariance of circle, image was divided into different sectorial sub blocks in polar coordinates, and the sum of regional pixels was taken as sector eigenvalue. Then a normalized feature space by norming sector feature set was got.

以圆的旋转不变特性为基础,在极坐标下将图像分割为不同的扇形子块,并将各子块区域灰度和作为表示扇形子块的特征,然后对子块特征集进行归一化,所得的归一化扇形特征集作为特征选取的空间。

By means of UV、IR and GC, we preliminarily analyzed the components, structures and content of the fatty acids in Trichosanthes kirilowii oil, and we also analyzed the structure of trichosanic acid .

并采用杂环化法衍生化瓜蒌仁油,应用气相色谱-质谱联用法对瓜蒌酸进行结构鉴定及含量测定,确定了瓜蒌酸的结构为C18:39c,11t,13c,采用峰面积归一化法计算出其相对质量分数为41.82%。

However, most reports on these aspects have been limited to the unmanipulated cells. The majar goals of the second part of this study is to thoroughly explore the effect of ex vivo expansion to the homing-related potential of UCB CD34〓 cells.

基于该领域的研究现状和第一部分的实验结果,第二部分在不同的扩增时点,将CD34〓细胞从扩增产物中再次纯化出来,从动态的角度观察了扩增过程中UCB CD34〓细胞归巢相关细胞粘附分子的表达、粘附功能、趋化功能和趋化因子受体CXCR4表达的变化,从而评价细胞因子介导的体外扩增对UCB HSPC体外归巢相关功能的影响。

This article comminutes the symbols of the formula and records their position by the outline rectangles of symbols, and then normalized these symbol. Then designed Artificial Neural Network that recognizes these symbol.

本文通过计算公式中字符的最小外接矩形,将字符依次分割开并记录其位置信息,然后进行归一化处理,利用本文设计的适合本文中字符识别的识别模块,即二层感知器神经网络识别模块,将归一化后的字符识别出来。

By spatially and temporally analyzing of the NSD which describes the normative difference of predicted SAD and minimum SAD after motion estimation, as well as the assumption that residual signal is Laplacian distribution, a modulation factor is given to realize early termination, thus a tradeoff between search speed and reconstructed video quality can be achieved.

本文定义了一个新的变量NSD-归一化SAD差值来描述预测所得的SAD值与实际搜索到的最小SAD之间的归一化关系。

Firstly, absorption spectra of the six different medicines, which were pretreated by normalized unit, were used to train libsvm program.

首先, 用归一化预处理后的6种药品的太赫兹吸收光谱训练libsvm模型;然后,选用与训练光谱不同时间测得的6种药品太赫兹吸收光谱作为检测光谱,经过归一化预处理后分别输入到训练好的libsvm模型中进行识别。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。