The program we made can calculate all kinds of compensating errors of quadric curve whose calculation accuracy can reach 10 - 6mm . the machining tools we devised can perform the functions of interception of quadric curves and errors compensation , which meets the demand of basic movements 编制出的程序可计算出各种二次曲线的补偿误差，精度可达10 ~ ( - 6 ) mm ，设计出的加工机床可完成二次曲线的截取，补偿等功能，满足基本运动要求。
This algorithm uses iterative contractions of vertex pairs , to simplify models and maintains surfaces error approximations using quadric matrices . we have applied these two methods to simplify models in our system and have done some improved work on the first one 后者立足于视差效果，用少量带有纹理和透明的平面来表示原模型，这些平面是相互独立的，不再包含网格的拓扑信息，模型的几何细节和侧影轮廓线也都是利用纹理和透明保存下来的。
Structural theory / experimental modeling and related analysis , dynamic reduction , structure finite element model updating based on the frequency response function , quadric exploit based on patran are studied in this dissertation about the key point of structure finite element model updating 本文围绕结构有限元模型修正这一主题,对结构理论/试验建模、理论/试验模型相关分析、动力缩聚、基于频响函数的结构有限元模型修正、基于patran的二次开发等领域展开研究。
By processing real - time digital analog fault vibration signal and adopting minimum quadric multiplication and rectangle function , correct frequency chart will be gained . thus , the system design based on advanced dsp can be applied to the real - time fault diagnosis of rolling bearing in modern high - speed train 通过对采集的模拟的有故障振动信号进行在线实时数字信号处理，并在信号分析方面采用了最小二乘法及加窗函数，以获得正确的频谱，通过信号处理，并进行结果比对，进而可证明此系统在高速列车转向架滚动轴承在线诊断中应用的可行性。
Abstract : brief introduction to ( 2 ) cascading nonlinearities is presented . the enhancement mechanisms for optical kerr effect and the photorefractive effect as ( 2 ) cascading process are discussed . mutual inductance between quadric and cubic nonlinearities opens possibilities for engineering optical nonlinearities 文摘:介绍了( 2 )串级非线性.讨论了串级光克尔非线性和串级光折变非线性的增强机制，并指出二阶和三阶非线性的相互转化，为光学非线性工程设计提供了可行性
This dissertation proposes an algorithm to detect edges and extract contours from medical images based on quadric spline wavelets transform . the algorithm can generate single , continuous and close contours . there are two main methods of surface reconstruction ? explicit connecting contours method and implicit function method 利用小波变换良好的局部化特性和其固有的多尺度特性，具体针对医学图象边缘轮廓提取的特点，提出一种基于二次样条小波变换的边缘检测和轮廓提取方法，提取出单像素和连续封闭的边缘轮廓。
Wavelet edge detection technology was applied to image segmentation of blasted muck - pile , in which quadric bspline wavelet and a method of adaptive thresholds edge detection for image based on wavelet transform were applied , and methods of expanding and deleting short chain were used to delete untrue edge better 摘要把小波边缘检测技术应用于爆堆图像分割处理中，采用基于最优条件下二次b样条小波和自适应模极大值的图像边缘检测算法，综合运用膨胀技术和短链删除技术，很好的去除了伪边缘。
Some new ideas are proposed in this thesis based on svm and ica : firstly , a modified svm method based on posteriori probability theory is given , which makes the classification super plane corrected from the original one . a better classification result is obtained without finding the best quadric optimization algorithm and large scale training datasets are reduced to small scale training datasets at the same time . secondly , ica is applied to the preprocessing period of the recognition character images for purpose of feature extraction and dimension reduction 本文在系统研究svm和ica的基础上提出了以下新的观点：其一是采用了引入后验概率的修正svm方法，它在原分类超平面的基础上不断修正分类超平面，提高分类正确率，从而避免了寻找最优二次规划的麻烦，同时将大规模训练样本集化为小规模训练样本集；其二是应用独立分量分析ica对需要进行识别的字符图像预处理，提取字符特征，降低输入数据的维数，从而可以为下一步的svm识别过程提供好的数据集，用以提高识别率和识别速度。
