This algorithmcarries on two values pictures processing in the differencefoundation , according to the human body statistical characteristic , proposed through the judgement projection curve second time derivativesize , determines the person face boundary the method 该算法在差分的基础上进行二值图像处理，根据人体的统计特征，提出通过判断投影曲线的二阶导数大小，来确定人脸边界的方法。
So it is impossible for enstatite to decompose to oxides between 50 to 140gpa . ( 5 ) the bulk modulus k0s and its first derivative of pressure k0s " were calculated from the experimental hugoniot data , by using eularian limit strain theory 3 ）根据本文顽火辉石hugoniot实验数据（结合前人的实验数据l用欧拉有限应变理论计算得到的顽火辉石零压炸弹性模量及其对压力的一阶导数为： k叮一266gpa ， k ； ，二4
Without grids , the interaction effect among neighboring particles can be simulated by means of the kernel function , based on which the governing equation is discretized by establishing the smoothing model , the gradient model and the second - derivative model ( i . e . the laplacian model ) 在无网格条件下，粒子间的相互作用通过核子函数来表示，并通过建立物理量光滑模型、梯度模型和二阶导数模型来离散控制方程。
Studied and proofed the relationship between the continuity of the interpolation spline function ' s derivative and its low - pass respondence in frequency domain . that is , we have try to answer the question : why do we need to design a spline function with second order continuity of its derivative 推导了插值样条函数的导数连续性与其频率响应的低通性的关系，在数学上解释了为何在构造样条函数时要追求二阶导数连续。
First , we apply the method of galerkin and the fixed theorem of the larey - schauder to prove the existence of the approximate solution . next , we give the priori estimates of the higher order derivatives ( with respect to spa - tial variable and time variable ) of the approximate solution 首先应用galerkin方法和larey一schaude :不动点定理证明近似解的存在性，然后进行近似解的高阶导数的先验估计(关于空间变量和时间变量) 。
The explaining for region gravity and magnetic data is accomplished by using result of potency field transformation through level and vertical relating with level one - difference of several height and vertical two - difference and working out construct map of region geophysics 对区域重磁资料的解释就是利用位场变换结果，是通过不同延拓高度的水平一阶导数、垂向二阶导数图的解释，再进行水平和垂向关联，编制区域物探构造图的方式实现。
Absorbing the idea of the reference [ 3 ] and based on paper [ 2 ] , the approximation theories of the global and pointwise of r + s order derivatives are obtained in the first part ; in the second part , the inequality of stechkin - marchaud type of generalized baskakov is studied 第一节吸收[ 3 ]的思想，在[ 2 ]的基础上得到了广义baskakov算子r + s阶导数的点态和整体的逼近定理；第二节研究了广义baskakov算子的stechkin ? marchaud型不等式。
