Several inequalities for L 2-projection body

In this paper, by using the L _p -Brunn-Minkowski theory and its dual theory, L ₂-version on the conjectured projection inequality is investigated, the (reverse) inclusive relationship between L ₂-projection body and the classical projection body are established, and a constrained minimization problem is solved. Project supported by the National Natural Sciences Foundation of China (Grant Nos.10671117, 10801140)     

通电直导线在磁场中所受安培力的侧视图画法

在实际的分析中,在平面上进行空间判断安培力的方向上有很大的难度,所以在判断一些复杂的安培力方向时都会选择画侧视图的方法,这样使得让学生难以理解的空间作图转化成易于理解的平面作图。     

用于声学回波抵消的自适应滤波算法

介绍了回波抵消器的原理和功能,详细阐述了现在广泛应用于回波抵消的各种自适应滤波算法,如变步长LMS,FTF,FAP等,并指出各种算法的特点.最后通过M atlab仿真,比较上述各种算法的性能,包括算法的复杂度和收敛速度,指明了各种算法的适用范围：变步长适用于对收敛速度要求不高的场所;FTF适用于采样率不大的语音处理设备中;AP类算法兼有收敛速度快和运算量较小的优点.     

等价类空间上投影算子的一些性质

应用算子矩阵和算子分块技巧,研究了具有相同等价类的子空间的一些性质.分别获得了等价类dimgM和dimgN,投影算子PM和PN,以及访投影算子的谱之间的一些关系.     

大学教学中投影依赖及其矫正

多媒体投影技术由于形象、直观、生动、信息量大,在现代教学中得到了越来越广泛的应用。但作为一种新的教学手段,在实际应用中存在许多问题需要探讨和解决,特剐是教师对其产生依赖时,它的优势就会变成劣势。因此,我们必须确立师生在教学中的主体地位,明白是在运用投影技术进行教学,而不是为投影技术而教学。     

Application of developed Grid-GA distributed hydrologic model in semi-humid and semi-arid basin

A grid and Green-Ampt based(Grid-GA)distributed hydrologic physical model was developed for flood simulation and forecasting in semi-humid and semi-arid basin. Based on topographical information of each grid cell extracted from the digital elevation model (DEM) and Green-Ampt infiltration method, the Grid-GA model takes into consideration the redistribution of water content, and consists of vegetation and root interception, evapotranspiration, runoff generation via the excess infiltration mechanism, runoff concentration, and flow routing. The downslope redistribution of soil moisture is explicitly calculated on a grid basis, and water exchange among grids within runoff routing along the river drainage networks is taken into consideration. The proposed model and Xin’anjiang model were applied to the upper Lushi basin in the Luohe River, a tributary of the Yellow River, with an area of 4 716 km2 for flood simulation. Results show that both models perform well in flood simulation and can be used for flood forecasting in semi-humid and semi-arid region.     

求解线性变分不等式的一种新的时滞投影神经网络

考虑了线性变分不等式问题.提出了求解它的一种新的时滞投影神经网络模型.利用泛函微分方程理论,证明了新模型解的存在惟一性,并给出了时滞投影神经网络全局指数稳定的充分条件.用数值模拟说明提出的神经网络的性能.     

The role of consequences of moral action in maximizing moral elevation

Moral elevation is described as a state of positive emotion that includes uplifting feelings, positive views of humanity and a desire to be a better person. Numerous empirical studies have demonstrated that elevation has powerful effects on people’s moral intention and behavior. The next step is to investigate how to maximize the emotion of elevation. According to the evolution of moral elevation research and the theory of moral disgust, we hypothesized that the consequences of moral action would influence moral elevation. The results of two studies in the present research (Study 1: N = 122, average age = 36.96 years; Study 2: N = 232, average age = 23.93 years) demonstrated that moral acts with good consequences were more effective in inducing moral elevation than moral acts with bad consequences. The implications for research and practice are discussed.     

Self-Controlled Amount of Practice Benefits Learning of a Motor Skill

Abstract

Self-control over factors involving task-related information (e.g., feedback) can enhance motor learning. It is unknown if these benefits extend to manipulations that do not directly affect such information. The purpose of this study was to determine if self-control over the amount of practice would also facilitate learning. Participants learned to throw a dart using their nonpreferred hand. The self-control (SC) group decided when to stop practice. The yoked group completed the same number of trials as their SC counterparts. Results revealed the SC group was more accurate during transfer and in recalling the number of trials completed. These findings indicate that self-control benefits extend to factors that do not directly alter task-related information.     

应用“点线面分析法”提高空间想象能力

组合体的读图与画图在工程制图课程中是重点和难点,正确理解投影面垂直面的“类似形”投影是关键。文中作者提出用“点线面分析法”来求解“类似形”。综合应用“点线面分析法”和“形体分析法”,能够帮助学生识读和绘制组合体,并提升学生的空间想象能力。