Let f(x) be the density of a design variable X and m(x) = E[Y|X = x] the regression function. Then m(x)= G(x)/f(x), where G(x)= m(x)f(x). The Dirac δ-function
The understanding and reduction of turbulent transport in magnetic confinement devices is not only an academic task, but also the matter of practical interest,
Six species of more than 20-year-old desert woody plants in the oasis-desert ecotone were selected for study. The results showed that: (1) in different growing
目前初中英语的听力教学还处于起始阶段,离新课标所规定的目标尚有一定距离。笔者初三教学时期做过一次关于听力测试的问卷调查,统计结果表明,有近50%的学生认为目前英语学习中最
In this paper we are concerned with a domain decomposition method with nonmatching grids for Raviart-Thomas finite elements. In this method, the normal compleme
评估语言测试中最为关键的两个质量指标就是信度和效度,但两者在本质上又是相互冲突的.尝试论证在一定的约束条件下,为了使某一特定测试的总效用达到最大化,我们能够找到效度
利用北京谱仪(BES-Ⅰ)在北京正负电子对撞机(BEPC)e+e-质心系能量为4.03GeV处采集的积分亮度为22.3pb-1的数据,研究了D0→K0sπ+π-,D0→K0sK+K-的衰变及其末态的共振结构.
进入21世纪,由于现代社会科学的综合化,学科间的复合、交融和渗透日益明显,单纯俄语语言、文学专业的毕业生已经远远不能满足社会对俄语人才的需求,俄语跨学科人才培养是当前