2MeV直线感应加速器注入器测控系统

简要介绍了直线感应加速器２ＭｅＶ、３ｋＡ、６０ｎｓ注入器测控系统。这是一个基于局域网的分级分布式测控系统，由三个主要组成部分分别处理慢信号、快信号和对束输运场供电电源的测控。系统硬件、软件的模块化结构和严格的抗干扰措施，使系统扩展容易，运行稳定。虚拟仪器操作面板的使用，使系统人机界面友善，操作方便。     

Al^3＋：KTP晶体生长及其相关性质研究

采用高温溶液法生长不同掺质浓度的Al3 :KTP晶体,以等离子体发射光谱法测定晶体中Al3 的含量,并计算出Al3 在相应生长体系中的分配系数.采用X射线粉末衍射和粉末倍频法分别测定了所生长晶体的晶胞参数和倍频效应,结果表明随着晶体中掺质浓度的增加,晶胞参数逐渐减小,而倍频效应呈现略微增强的趋势.     

离散可积耦合系统零曲率方程的代数结构及其对耦合Volterra系统的应用

基于Lie代数的半直和思想,
建立了离散可积耦合系统的代数结构,
并将这种结构应用到耦合 Volterra 族生成$\tau$-\!对称代数.     

Lehmer序列中的平方数与平方类

设Vn(R,Q)表示参数为R和Q的Lehmer伴随序列.如果R和Q为互素奇数且D=R-4Q>0,我们找出了满足Qn(R,Q)或n1Qn(R,Q)是平方数的所有奇数n.这里,从而改进了文[15]的工作.     

新型有机聚合物光子射频2路移相器的设计

以3dB带宽为12GHz的有机聚合物光子射频2路移相器的理论设计为目标，设计了一种新型的有机聚合物射频（RF）移相器，并对其光波导结构及电极系统进行了仿真。分析了移相器的输出特性，可在两个端口实现360°的连续线性移相，并且输出功率波动小于3dB。该器件移相性能好，体积小，有利于阵列集成。     

An Alternative Approach for Determining Photoionization Rate in H2^＋：Numerical Results

We present an alternative approach for determining the photoionization rate of hydrogen molecules under the interaction of intense light, by calculating the spatial overlap integral between the potential function and the time-dependent wavefunction. The suggested method was applied to varying excitation pulse shapes: square envelope and chirped hyperbolic secant envelope. The computed results confirmed that our method was robust and could be extended to general molecular dynamics calculations.     

A compact graphene Q-switched erbium-doped fiber laser using optical circulator and tunable fiber Bragg grating

We demonstrate a passively Q-switched tunable erbium-doped fiber laser(EDFL)based on graphene as a saturable absorber(SA).A three-port optical circulator(OC)and a strain-induced tunable fiber Bragg grating(TFBG)are used as the two end mirrors in an all-fiber linear cavity.The Q-switched EDFL has a low pump threshold of 23.8 mW.The pulse repetition rate of the fiber laser can be widely changed from 9.3 kHz to 69.7 kHz by increasing the pump power from23.8 mW to 219.9 mW.The minimum pulse duration is 1.7μs and the highest pulse energy is 25.4 nJ.The emission wavelength of the laser can be tuned from 1560.43 nm to 1566.27 nm by changing the central wavelength of the straininduced TFBG.     

基于共振异常的消偏振型窄带滤波器分析

亚波长光栅因光栅参量的不同而具有不同的衍射特性,通过对亚波长光栅参量的合理设计来实现消偏振窄带滤波是一种新的方法与途径。首先分析了基于共振异常的窄带滤波的物理机制及存在条件,讨论了二维亚波长光栅实现消偏振窄带滤波的可能性。然后,利用严格模式理论进行了计算模拟,其计算结果与导波理论所得结果基本吻合,其衍射特性表现出周期性共振异常、敏感的角度依赖性和波长依赖性。最后,讨论了由工艺误差对滤波特性所带来的影响。为具体工艺制作提供了一定的指导。     

Finite-time robust control of uncertain fractional-order Hopfield neural networks via sliding mode control

The finite-time control of uncertain fractional-order Hopfield neural networks is investigated in this paper. A switched terminal sliding surface is proposed for a class of uncertain fractional-order Hopfield neural networks. Then a robust control law is designed to ensure the occurrence of the sliding motion for stabilization of the fractional-order Hopfield neural networks. Besides, for the unknown parameters of the fractional-order Hopfield neural networks, some estimations are made. Based on the fractional-order Lyapunov theory, the finite-time stability of the sliding surface to origin is proved well. Finally, a typical example of three-dimensional uncertain fractional-order Hopfield neural networks is employed to demonstrate the validity of the proposed method.