目的 观察骨髓间充质干细胞(MSCs)体外对1型糖尿病(T1DM)大鼠淋巴细胞表型及增殖能力的影响,探讨其抑制淋巴细胞增殖的机制.方法 分离、培养和鉴定大鼠MSCs,噻唑蓝(MIT)比色
随着微机电系统的发展,器件设计和加工过程中的表征成为一个主要问题。提出了将扫描白光干涉表面轮廓测量方法用于微结构和器件的几何特性检测上。测量系统采用了米劳显微干
Lagrangian support vector machine (LSVM) cannot solve large problems for nonlinear kernel classifiers. In order to extend the LSVM to solve very large problems,
For joint retrieval of vertical distributions of both air density and ozone concentration in the mesosphere which are two of the most important atmospheric para
研究描述人脸特征的有效方法,讨论身份证照片的特征提取和检索.采用自适应肤色检测技术改进通用的肤色检测算法,进行脸部区域的划分.提出 DCT 系数投影法对面部五官区域进行分割,在各区域中提取面部几何特征.引入描述脸颊和下颔轮廓的曲线参数作为脸形特征,得到对人脸特征更准确的描述.将面部几何特征矢量匹配、脸形曲线参数匹配和脸部图像相关匹配相结合,实现人像照片的准确检索.实验表明该方法性能优良.
Constructing a convexity-preserving interpolating curve according to the given planar data points is a problem to be solved in computer aided geometric design (
Multiscale coupling is ubiquitous in nature and attracts broad interests of scientists from mathematicians, physicists, machinists, chemists to biologists. Howe
A nonlinear optimization method is applied to sensitivity analysis of a numerical model. Theoretical analysis and numerical experiments indicate that this metho
The well-posedness of the Cauchy problems to the Korteweg-de Vries-Benjamin-Ono equation and Hirota equation is considered. For the Korteweg-de Vries-Benjamin-O
A multi-layer zone fire growth model is developed to predict the vertical distributions of the temperature in a single room. The fire room volume is divided int