特征函数

Firstly, a signalized point is stuck on a moving object to be tested, a microphone array and two video cameras are arranged, and the video cameras are demarcated to obtain a projection matrix; sound pressure signals of a sound source in the moving object to be tested are obtained by the microphone in an array mode, the dynamic video of the moving object to be tested is obtained and disassembled into an image by the video cameras; the signalized point on the moving object to be tested is identified in the video image and the matched signalized point is treated with three-dimension reconstruction to obtain the spatial location of the moving object to be tested; the sound pressure signals are treated with beam forming treatment to obtain a sound field characteristic function scattergram of the moving object to be tested, the video image is treated with spatial coordinate superposition frame by frame and restored into a dynamic video image.

首先在被测运动物体粘贴标志点，布置传声器阵列和两台摄像机，对摄像机进行标定，得到投影矩阵；传声器阵列获取被测运动物体中声源的声压信号，摄像机获取被测运动物体的动态视频，将动态视频拆解成图像；在视频图像中识别出被测运动物体上的标志点，对匹配后的标志点进行三维重构，获取被测运动物体的空间位置；对声压信号进行波束成型处理，得到被测运动物体的声场特征函数分布图，将其视频图像进行逐帧空间坐标叠加，并还原成动态视频图像。

We obtain the eigenfunction through inverse transform,and select appropriate threshold to extract iso-surface.We append the weighted coefficients on sampling density for non-uniform sampling to further compute rational thresholds.

调用快速傅立叶变换FFTW(The Fastest Fourier Transform in the West)软件包，根据点的位置和法向量计算傅立叶系数，通过逆变换求出特征函数，选择合适的阈值提取表面的等值面，对于非均匀采样通过采样密度的加权系数进一步计算合理的阈值。

This paper proposed robust characteristic function for real-time flood forecasting system,and established the dynamitic monitor module for rainfall error,and researched dynamitic robust estimation for AR model parameters.

把抗差估计理论引入实时洪水预报系统，提出适合于实时洪水预报系统的抗差特征函数，建立降雨误差的动态监控模式，研究实时修正模型参数的动态抗差估计，结合洪水预报模型，形成具有水文学特点、抗差性强的实时洪水抗差预报系统。

This paper discusses the existence of positive solutions for sublinear semipositone elliptic problems.

借助-ΔDirichlet边值问题的主特征值λ1相应的特征函数的性质，利用上、下解方法，讨论了一类次线性半正单调椭圆问题正解的存在性。

And it directly affects the succedent calculation of solution and display of result.

第三章提出了基于特征函数分布的有限元节点散射加载方法。

The diameter measurement of wire rope based on the return flux is studied, the measuring method based on the return flux and charcteristic function are analysed, the probe structural design and the quantitative analysis software design are discussed.

研究了基于回磁通量磁测法的钢丝绳直径测量，分析了基于回磁通量的测量原理及特征函数的求取，讨论了探头的结构及定量分析软件的设计。

Based on the test and analysis,this paper gives self similarity feature functions of phonon emission process in quantitative test.

本文在试验基础上，通过分析给出了定量考察声发射过程自相似性的自相似特征函数。

Concerned in this paper are the eigenvalues and the corresponding eigenfunctions for the crosswise vibration equation of a bean with continuous load, which can be related to a differential integral equation.

本文研究了附加连续荷载梁的横向振动方程的特征值及特征函数的性质。在一定的假设之下，附加连续荷载梁的横向振动方程对应一个微分积分方程。

Taking the problem of vertical vibration of a rod as an example,the physical meaning of the second type of orthogonality of eigenfunctions of the Sturm-Liouville...

以杆的纵振动问题为例，阐明了斯图姆—刘维尔问题特征函数第二类正交关系的物理意义。

The fluid domain was divided into two regions by imaginary interface. The velocity potential in each region was expanded by eigenfunctions.

假想存在一个圆柱面，把流场划分为内外区域，在每个区域上将速度势用特征函数展开，然后在它们的公共边界上进行街接。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷