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枪弹头痕迹自动比对数学模型的研究及统计分析
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作者 王帅 《数学的实践与认识》 CSCD 北大核心 2010年第15期98-104,共7页
对于题目中的几个问题,首先给出了一个计算并消除两组划痕数据之间平移误差和转动误差的精确算法,然后利用中值滤波+低通滤波+高斯滤波的方案来消除噪声和误差,最后对过滤后的数据进行分析,提取了一维特征向量并提出了比对特征相... 对于题目中的几个问题,首先给出了一个计算并消除两组划痕数据之间平移误差和转动误差的精确算法,然后利用中值滤波+低通滤波+高斯滤波的方案来消除噪声和误差,最后对过滤后的数据进行分析,提取了一维特征向量并提出了比对特征相关系数作为检验弹头相似程度的标准. 展开更多
关键词 精确解析算法 自动比对 比对特征相关系数
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Unsteady 3D algebraically explicit analytical solutions for bio-heat transfer equations
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作者 LI YuanYuan CAI RuiXian 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第2期362-368,共7页
Reasonable unsteady three-dimensional explicit analytical solutions are derived with different methods for the widely used bio-heat transfer equation–Pennes equation.The condition to decide temperature oscillation is... Reasonable unsteady three-dimensional explicit analytical solutions are derived with different methods for the widely used bio-heat transfer equation–Pennes equation.The condition to decide temperature oscillation is obtained in this paper.In other cases the temperature would vary monotonously along geometric coordinates as time goes by.There have been very few open reports of explicit unsteady multidimensional exact analytical solutions published in literature.Besides its irreplaceable theoretical value,the analytical solution can also serve as standard solution to check numerical calculation,and therefore promote the development of numerical method of computational heat transfer.In addition,some new special methods have been given originally and deserved further attention. 展开更多
关键词 Pennes equation temperature oscillation THREE-DIMENSIONAL UNSTEADY analytical solutions
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