Numerical Analysis of the Streaming Potential in Bone Tissue

Biphasic porous medium model,based on the mixture theory in continuum mechanics frame,is used to depict the distributing disciplinarian of sclerotin's stress field,distortion field and pore pressure when the bone tissue is subjected to various dynamic loadings.The coupling relationship among the distortion,fluid flow and the streaming potential is studied.The penalty finite element formulation for streaming potential is studied.The penalty finite element formulation for streaming potential distributing in bone tissue is obtained by using Galerkin weighted residual method for the biphasic porous medium model with corresponding initial and boundary conditions,in this modeling,the solid phase is assumed to be isotropic elastic medium,and the fluid phase is ideal fluid.The computational results show that because of the distortion of bone tissue the marrow's flow is raised,then the electriferous partical moves in the porous and the streaming potential appears.     

Face Recognition Based on Weighted PCA

This paper proposes a face novel recognition method based on Weighted PCA, which combined weighted features with PCA. At first, we calculate the weighted subspace for each class by minimizing the weighted reconstruction error. Then a test example is classified by the distance from weighted subspace. The experiments on Cambridge ORL database show that our Weighted PCA method can improve the recognition rate significantly without increasing the computation, when compared with PCA.     

CALCULATION OF THIN PLATES BENDING EEFORMATION AND CRITICAL PRESSURE BY THE TCHEBYCHEV''S POLYNOMIALS

In this paper trial functions of the second Tchebychev's polynomials is used with Cantorovich variational method in energy functional of thin plate. Bending deformaion of rectangle plate under even loads or concentrate force with several bearing and critical pressure in buckling is resolved. Though the first similar is used but calculations indicate that this method is simple and exact in engineering.     

Machine Vision Aided Testing System for Flatness Based on Equal Inclination Interference Theory

An approach is described on the automated tracking of interference circle fringe to get the flatness accurately based on the Equal Inclination Interference Theory (EIIT). The system,based on the theory of EIIT, can be applied to grasp the changing fringe information, which is white alternating with black through the CCD camera. Following the basic principle of fringes image centro-symmetric, we create some windows, process only the interference fringes information in the windows. According to the position of the processed interference fringe and the position of the last adjacent interference fringe in the windows, the interference fringe variation value N from the starting measured point is received, it implies the changed altitude value from the starting measurement point. This method allows us not only get the fringe information of the half-wavelength integer multiple but also denote those of the half-wavelength decimal multiple. The system is proved to be effective experimentally. It is useful in metrology department for the high-precision flatness standard unit.     

Imaging diagnosis--magnetic resonance imaging findings in a dog with sequential brain infarction

An adult greyhound was evaluated on three occasions for acute, intracranial neurologic signs. Based on magnetic resonance (MR) imaging, there were T2‐hyperintense and T1‐hypointense, noncontrast enhancing lesions in the cerebellum, and brain stem. Using diffusion‐weighted imaging (DWI), the lesions were characterized initially by restricted water diffusion. The presumptive diagnosis on each occasion was acute ischemic cerebrovascular accident leading to infarction. This allowed us to characterize the changes in appearance of infarcted neural tissue on the standard MR sequences over time, and to confirm that the DWI could be successfully used in low‐field imaging. © 2012 Veterinary Radiology & Ultrasound.     

基于县域GWR模型的国土资源执法满意度的空间分析——以新疆阿克苏地区为例

以新疆国土执法监察情况为研究对象,在研究阿克苏地区土地执法监察现状、问题和原因的基础上,解读新疆地区土地执法监察体系建设存在难点,并提出思考。在满意度调查问卷基础上引入Logistic模型回归检验,构建满意度方程,分别对2006、2010、2014年阿克苏县域满意度进行空间分析和驱动因素分析。结果显示,(1)从问卷情况看,地方财政收入与经费预算情况等客观经济因素制约硬件设备及执法手段;巡查路线固定可能留有执法死角或背影范围;违法宣传教育工作仍然是执法监察系统内外部高度关心方向。(2)从执法空间格局上看,东北县(市)执法满意度较高,西南县(市)较低;农村居民用地并不是主要违法对象;城市人口增长与土地违法情况恶化呈正相关,城市化进程中违法情况和执法难度呈现出加大趋势;民族成分与执法满意度呈负相关,表现为少数民族比重越大,地区执法情况越复杂、形势越严峻。国土执法监察是维护土地管理和土地市场秩序的基本途径,需多渠道不断加强完善,提高执法成效,实现土地资源开发利用的可持续发展。     

家具企业操作工人不安全行为危险性评价

人的不安全行为是导致事故发生的直接原因之一。采用行为抽样法对家具制造企业操作工人的不安全行为做了大量抽查工作,采用加权危险指数法评价作业工人不安全行为的危险性,找出家具生产中危险性大的不安全行为,以降低家具企业生产事故的发生频率。     

改进加权FCM用于裂纹蛋2D图像分割的研究

解决裂纹鸡蛋图像灰度直方图目标与背景区域分布模糊、图像分割效果差的问题.通过将包含空间信息的二维直方图和改进特征加权FCM算法有机结合,迭代寻求最佳聚类有效性函数和加权矩阵,实现鸡蛋图像缺陷分割.同时,对经典FCM和改进特征加权FCM算法的性能进行了分析比较.结果表明:提出的算法更接近于真实聚类中心,目标函数值亦得到改善;二维直方图的改进特征加权模糊聚类算法更好地提取了裂纹鸡蛋图像的细节信息,图像分割效果好.     

基于熵权TOPSIS方法的中国渔业发展水平综合评价研究

渔业是我国国民经济的重要组成部分,对农民增收具有较为重要的意义。我国渔业生产地域分布差异明显,为了对我国渔业发展水平进行综合评价,构建了渔业发展综合水平评价指标体系。基于熵权TOPSIS方法,利用2012年中国省级数据计算指标权重,并对中国各省市区渔业发展综合水平进行了综合评价。研究结果表明,中国的渔业发展综合水平呈现较为明显的区域差异,一方面,东部区域与中部区域内省区排名均存在两极分化格局;另一方面,西部区域与东北部区域整体发展水平较低。基于研究结果,探讨了相关的政策含义。     

Research on Assessment Method of Urban Drainage Systems Reformation

A reasonable selection of the method for evaluating the urban drainage system was discussed in this paper.Weighted average method and fuzzy synthetic evaluation were used to evaluate a modern urban drainage system,and a reasonable conclusion was obtained.