Coordination chemistry of organometallic polydentate ligand Reactive chemistry of the tridentate ligand trans-Fe(Ph_2PQu-P)_2- (CO)_3 [Ph_2PQu=2-diphenyl-phosphino-4-methylquinoline] and molecular structure of [Fe(CO)_3(μ-Ph_2PQu)_2HgI]~ [HgI_3]~-

Reaction of a new type of bidentate ligand PhPQu [ PhPQu = 2-diphenylphosphino-4-methylquinoline] with Fe(CO)5 in bu-tanol gave trans-Fe(PhPQu-P)(CO)3 (1).Compound 1,which can act as a neutral tridentate organometallic ligand,was reacted with I B,II B metal compounds and a rhodium complex to give six binuclear complexes with Fe-M bonds,Fe(CO)3(u-Ph2PQu)MXn(2-7) [M=Zn(Ⅰ),Cd(Ⅱ),Hg(Ⅱ),Cu(Ⅰ),Ag(Ⅰ),Rh(Ⅰ)],and an ion-pair complex [Fe(CO)3(n-Ph2PQu)2HgI][HgI3]- (8).The structure of 8 was determined by X-ray crystallography.Complex 8 crystallizes in the space group P-1 with a=1.0758(3),b= 1.6210(4),c = 1.7155(4) nm; a = 75.60(2)β=71.81(2),Y = 81.78(2) and Z = 2 and its structure was refined to give agreement factors of R =0.050 and Rw = 0.057.The Fe-Hg bond distance is 0.2536 nm.     

捷联惯性测量组合标定的仿真研究

本对卡尔曼滤波在捷联惯性测量组合标定中的应用进行了研究,提出了一种辨识激光陀螺和加速度计静态误差的在线正交标定方案,并在不同滤波条件下了仿真验证,结果表明这是一种比较有效的误差标定方法。     

Chaotic synchronization via linear controller

A technical framework of constructing a linear controller for chaotic synchronization by utilizing the stability theory of cascade-connected system is presented. Based on the method developed in the paper, two simple and linear feedback controllers, as examples, are derived for the synchronization of Liu chaotic system and Duffing oscillator, respectively. This method is quite flexible in constructing a control law. Its effectiveness is also illustrated by the simulation results.     

也谈圆中常见的两解问题

文[1]中,对圆中常见的两解问题进行了归纳: (1)两平行弦之间的距离;(2)弦所对的圆周角;(3)已知半径、两弦长,求两弦的夹角;(4)两圆相切; (5)半径不等的相交两圆的圆心距,笔者对此问题也进行过归纳与研究,下面结合课堂教学及相关的中考试题,谈谈圆中其他常见的两解问题。     

φ300mm碘化铯晶体发光非均匀性与生长界面的关系

报道了迄今为止国内首次生长出的最大直径(300 mm)碘化铯CsI(Tl)闪烁晶体,并采用X射线和137Cs所发射的-射线为激发源分别测试了该晶体不同部位的发光强度,分析了这些部位的铊离子浓度,并对发光强度与铊离子浓度及其空间关系进行了讨论,认为该晶体在水平面上的发光不均匀性反映出生长界面具有凸向上的特征,进而提出调节温度场对改善均匀性具有重要作用.     

高功率微波作用下光电转换器的抗干扰特性分析

随着智能电网上升成为国家战略,其高速、高集成度的光纤通信网络通信的安全性和可靠性成为了一个需要重点关注的问题,然而电网中广泛使用的光电信号转换装置却并没有针对可能遭受到的强电磁脉冲攻击进行防护,一旦被干扰或损伤,可能危及整个通信网络乃至电网的安全性。针对一种常用的光电转换器,开展了典型高功率微波环境下的辐照效应试验,发现其在较低场强即可能出现干扰和扰乱的效应现象。并通过进一步的壳体耦合仿真分析和典型半导体器件的干扰机理研究,明确了散热孔阵为主要的能量耦合通道,低频(L波段)耦合效果优于高频(S波段)近一个量级。耦合场通过场路耦合主要作用于转换芯片,本质原因可能是半导体器件的闩锁效应。