Diagnosis of prostate cancer by quantitative analysis of 3DMRSI data: A new model

Prostatecancer (PC)hasthehighestmorbidityrateinmaleurinarysystemdisordersinEuropeandAmerica ,anditisoneoftheprimaryreasonsofmaledeath[1] .InChina ,althoughtheattackofPCisrela tivelylow ,ithasa growingtrendinrecent 10years[2— 4 ] .Inclinicalpractice ,magneticresonanceimaging (MRI)could providehighresolutionmor phologicalstructureandhasthecapabilityofmulti parameterimaging ,butitcannotreliablydifferentiatePCfrombenignprostatehyperplasia (BPH)andnor maltissues ,particularlyforthepatientswi…     

双参数地基上无限大板受集中力作用的两个新解

就Ｇ２ｐ≥４ｋＤ的情况给出了双参数地基上无限大板受集中力作用的两个新解．     

Boole函数的稳健线性可分及其计数

Ｂｏｏｌｅ函数的线性可分和线性不可分问题，一直是前向人工神经网络的一个比较困难的问题，目前仅对变量数ｎ＜７的线性可分问题给予过讨论。本文基于简化问题讨论和优化问题的解的思想，提出了稳健分类复杂度的概念，并对Ｂｏｏｌｅ函数稳健分类复杂度为１的稳健线性可分问题，提出了对这类Ｂｏｏｌｅ函数进行计数的方法，并给出了计数结果     

SURE模型中参数估计的若干结果

综合报导有关ＳＵＲＥ模型中参数估计及其优良性的一些近期研究成果，主要包括回归系数β以及协方差矩阵Ｖ的各种估计和它们的优良性．     

空间中双波干涉的数学讨论

大学物理中光的干涉原理及相关知识是波动光学中一个重要的知识点。文章通过对光在空间中干涉的明条纹的轨迹方程的推导，进一步说明双缝干涉规律的论述，只是一种近似取值的结果。     

Pólya计数定理的全方位推广

将一个集合代之以若干个不交子集之和,并将作用于其上的一个置换群代之以同等个数的置 换群所作成的直积,在重新定义有关概念之后,对P6lya计数定理作了全方位的推广.     

Application of synchrotron source based DEI method in guinea pig cochleae imaging

Hard X-ray diffraction enhanced imaging (DEI), which is based on a synchrotron source and monochromator-analyzer-crystal system, is an effective method for imaging X-ray phase shift. Utilizing an analyzer crystal with high angular sensitivity of micro-radian, DEI can measure the transmitted, refracted and scattered X-rays when projecting onto a sample. It dramatically improves the contrast and spatial resolution of the resultant images. At the topography station of Beijing Synchrotron Radiation Facilities (BSRF), we implemented DEI method in guinea pig cochleae imaging and acquired a series of DEI images. Based on these images, the apparent absorption and refraction images were calculated. The DEI images revealed the holistic spiral structures and inner details of guinea pig cochleae clearly, even including the structures at the cellular level, such as the static cilia of hairy cells and the limbus of Hansen cell. Due to the advantages of high contrast, high spatial resolution and distinct edge-enhanced effect, DEI method promises extensive applications in biology, medicine and clinic in the near future.     

论传统文论徜徉于两端之间的思辨风度

传统文论以“扣其两端”、徜徉两端之间的风度来进行文学批评,在文学与非文学之辨上提出了其适当的度、平衡点就是“以能文为本”;在创作规范上提出了“不雅不俗”、“不今不古”、“法而不法”等崇尚;在作品评价上提出了“丽而不浮”、“典而不野”等判断。传统文论以“扣其两端”、徜徉两端之间的风度给自己的思辨判断留出了足够的空间,给予自己更大的发挥天地,也更切合批评对象的实际情况。传统文论“扣其两端”、徜徉两端之间的风度来自于古代文人做人的徜徉两端之间的风度。     

上机盖模锻过程的数值模拟

采用三维刚塑性有限元法对上机盖模锻过程进行了数值模拟，得到了各主要变形场量的分布及金属流动规律，为合理地确定上机盖模锻工艺方案提供了依据。     

多维时间序列的周期分析

根据作者提出的能量关联度理论，探讨了多维时间序列的周期分析问题，互能量关联度的计算及频率域上主要影响因素的提取，结合实例验证了理论和方法的可行性