双船联合举升多体协同作业系统横摇稳性评估

基于ADAMS平台,构建特定场景双船联合举升多体协同作业系统虚拟样机,对新型一体化拆解作业双船联合举升过程中待拆除组块横摇稳性进行预测与评估。构建了该系统拓扑模型,使用几何参数描述系统中上部组块横摇运动特征;通过虚拟样机仿真探究了双船不同耦合运动情况时上部组块最危险失稳状态,并分析了上部组块重心至连接点连线垂直距离与水平距离比值对横摇角度的影响规律。结果表明:物理模型试验数据驱动的虚拟样机技术可以有效评估该系统运动特征,与几何拓扑模型得到的上部组块横摇失稳角度理论公式计算结果吻合;双船同相位横摇与反相位垂荡耦合运动时对上部组块横摇稳性影响最大;待拆除上部组块横摇失稳时的极限纵横比可以作为复杂多体系统横摇稳性评估参数,为实际工程方案选择提供参考。     

Progress in magnetic couple system of nitroxidemetal complexes

Metal_radical method is an effective approach to synthesizing magnetic molecular materials. With the development in decades, the study of nitroxide_metal complexes has made great progress in model, theoretical treatment and design of molecules. Several mechanisms of the metal_radical magnetic coupling are discussed. Molecular magnetic project of nitroxide_metal complexes has made fruitful achievements, but crystal magnetic project is difficult to be controlled, and it is a challenge to chemists. The studies on nitronyl nitroxide_metal complexes are summarized. At present, there are three major approaches to increasing the T c of the metal_radical compounds: (ⅰ) Searching for nitronyl nitroxide ligands that can yield 3_D ferro_ or ferrimagnetic structures; (ⅱ) decorating the structure of radicals with the aim to enhance the coordinate capability of radicals; (ⅲ) grafting polynitroxide radicals as a versatile bridge. The third approach, namely searching for polynitroxide ligand, will serve as a hopeful strategy for exploring higher T c radical molecule_based magnets.     

直线电机瞬态特性的场路耦合分析法

运用磁网络法,进行了单边直线感应电动机的性能分析。提出了此种电机的磁网络模型,由电磁场方程导出了磁网络的参数,从而考虑了直线电机边端效应、绕组不对称分布等结构特点。场路耦合及机电耦合法的运用,使文中提供的分析模型更接近实际情况,适合于动态特性的分析     

单模光纤的偏振特性分析

本文分析了性能不完善的单模光纤产生偏振特性的机理,并解释了偏振特性引起的几种物理现象,论证了性能完善的单模光纤不存在偏振特性。     

一种压电复合材料层合板机电耦合有限单元

基于压电复合材料层合板经典理论,建立了一种四边形机电耦合有限单元．所建单元具有ｍ个电自由度,可直接模拟单元中的电压作用和检测电压输出;单元每一节点具有５个位移自由度,可计及复合材料层合板的拉弯耦合变形．给出了各类刚度矩阵的形式,简述了利用Ｈａｍｉｌｔｏｎ原理推导出机电耦合基本运动方程的过程,并根据所推导的有限元素和基本方程编制了程序并进行了计算,所得结果与文献中的计算和试验结果相吻合．     

广义自旋变相过程的最优耦合及其保序性

将最优耦合方法应用到广义自旋变相过程,证明了其最优耦合的存在性,并给出一类特殊情形的显示表达式,还讨论了其保序性。     

单模光纤耦合的计算及其软件技巧

介绍了理论演算与工程数据相结合计算单模光纤耦合率的方法及其软件技巧,使用此方法取得较精确的计算结果     

等效连续裂隙岩体渗流与应力全耦合分析

推导了等效连续裂隙岩体渗透性与应力变形的关系,根据应变等效原则推导了等效连续裂隙岩体的弹性矩阵,首次采用四自由度全耦合法,建立了等效连续裂隙岩体渗流与应力的全耦合有限元方程组,进行了等效连续裂隙岩体渗流与应力的全耦合分析。     

递推法推引j—j耦合谱项的研究

首次提出递法推引ｊ－ｊ耦合谱项,计算结果很好,该法能抓住关键通过手算快速求出组合组态（（ｊ）＾ｎ）的Ｊ值。最后,对计算结果进行了验证。     

Studies of a key protein in the mechanism of the excitation-contraction coupling process of frog skeletal muscle,using phenylglyoxal

The excitation-contraction (E-C) coupling process in single twitch fibres from frog toe muscle was inhibited selectively by phenylglyoxal (PGO), a specific guanidyl modifying reagent. A new protein (31.5 kDa), which has PGO-binding ability and seems to play a key role in the E-C coupling process, was solubilized from transverse tubule membrane-junctional sarcoplasmic reticulum complexes (TTM-JSR) of frog skeletal muscles, using¹⁴C-PGO. The monoclonal antibody against this protein applied extracellularly inhibited the E-C coupling process of the single fibres. This protein appears to constitute the very first step of input for E-C coupling. It is considered to behave as an indispensable part of an electrometer to measure membrane potentials. Therefore, the name electrometrin is suggested for the new protein.