独立α粒子模型下的α-~(12)C弹性散射

本文以拟合实验的a—a散射振幅f_a为元振幅,用核的独立a粒子模型波函数,在Glapber理论框架下计算了1.37Gev的a粒子在(12)~C上的弹性散射微分截面。结果与实验较好地符合。     

平台印机转动惯量与制动力矩的计算与测试

介绍对某平台印刷机等效转动惯量和制动力矩的理论计算和测试试验的方法和结果.内容包括运动分析,等效到制动轴的整机等效转动惯量计算,在各种预定时间内制动停止所需的制动力矩计算以及实际测试试验.理论计算与测试所得结果相当吻合.     

齿轮传动试验台微机测量系统

齿轮传动试验台微机测量系统是一种新型的综合测试系统，它克服了齿轮传动试验台传统测量装置的缺陷，实现了对转速、转矩、效率及温升等参数的自动检测及数据处理。     

一种广义二阶导数和二阶次微分

给出了Banach空间X上的实值函数f的一种广义二阶方向导数f~(00)(x;υ;ω)的定义,f~(00)(X;·;·)是X×X上的双正齐次凸泛函.在f~(00)(x;·;·)取有限值时给出了二阶次微分(?)f(x)的定义,当f~(00)(x;·;·)有界时,(?)f(x)是一个非空的有界闭凸集。当X=R~n时,(?)f(x)与Urruty的广义Hessian矩阵一致。     

基于FMT的扩散张量成像脑白质纤维跟踪算法

扩散张量成像及脑白质纤维跟踪技术是目前惟一采用的活体、无创、三维显示脑白质纤维的成熟方法.针对扩散张量成像的特点,运用快速行进法产生基于体素的联合函数,并通过反向跟踪重建了脑白质纤维.实验结果表明,反向跟踪有效地解决了纤维的分叉问题,速度函数的改进使得跟踪的效率明显提高,而且结果也更加符合解剖结构.该算法的提出很好地解决了目前临床DTI数据可视化中的难题.     

环形MR—TMD半主动控制的研究

本文讨论了在TMD质量块上安装磁流变驱动器的一种控制装置,根据一定的半主动控制算法,得出所需的半主动控制力,通过调节磁流变阻尼器的参数来调节MR驱动器的控制力,实现对结构的半主动控制．     

Indentation tectonics in the accretionary wedge of middle Manila Trench

Based on the multibeam morpho-tectonic analysis of the Manila Trench accretionary wedge and its indentation tectonics and the contrasting researches with other geological and geophysical data, three tectonic zones of the wedge are established, faulting features, tectonic distribution and stress mechanism for the indentation tectonics are analyzed, oblique subduction along Manila Trench with convergent stress of NW55~ is presented, and the relationship of the ceasing of Eastern Subbasin spreading of South China Sea Basin to the formation of subduction zone of Manila Trench is discussed. By the model analysis and regional research, it is found that the seamount subduction along Manila Trench does not lead to the erosion of the accretionary wedge and the oblique subduction actually is a NWWtrending obduction of Luzon micro-plate that results from the NWW-trending displacement of the Philippine Sea plate.     

Rapid solidification mechanism of Ag60Sb34Cu6 ternary alloy in drop tube

Ternary eutectic growth involves competitive nu-cleation and growth of three solids from one liquid. Thesolidification behavior of ternary eutectic alloy is morecomplex than that of binary eutectic alloy due to the addi-tion of the third component[1—4]. Up to now, most scientificinvestigations on ternary eutectic alloy focus on the influ-ence of changing the component or adding a fourth even afifth element on the performance of the alloy[5—8]. How-ever, the information on crystal growth char…