环状输出UR90束旋转非稳腔的实验研究

 提出一种适合于高功率超音速横流氧碘化学激光器的环状输出的UR90束转非稳腔,采用FFT 方法模拟了具有非均匀分布的小信号增益时最低阶模的光场强度分布。利用大口径铜蒸汽激光器, 通过实验研究了在放大倍率为1.21和1.13的情况下,环状输出UR90腔正向模与反向模的基本特性, 得到较好的实验结果。     

电容应变式压力传感器原理及检测电路设计

论述了电容应变式压力传感器的原理，给出了一种电容应变式压力传感器的电路，并分析了压力大小与电路输出电压之间的关系。     

激光加速电子束团的输出特性研究

通过仔细研究俘获加速CAS(captureandaccelerationscenario)机制中电子束团的输出特性,发现其出射电子有3类不同的运动轨道即掠过(pass-by)、非弹性散射(IS)、CAS.由于实际入射电子束团的线度远大于强激光脉冲的线度,因此只有位于入射电子束团中心区域的电子才可能被俘获加速.对于目前所能获得的聚焦激光场强(～10²¹W/cm²)和实际的电子束团(～10⁸个电子)而言,最大的输出能量可达到450MeV以上,同时被加速电子的数目可达到10⁴—10⁵个.这表明CAS可望发展成为小型台式加速器的新加速原理     

基于快速输出采样反馈技术的无抖振离散滑模控制

针对一类单输入单输出的离散时间系统,提出了一种基于快速输出采样反馈技术(FOS)的无抖振滑模控制器.该控制策略避免了在控制器中采用切换模式,从而消除了切换面附近的抖振.理论分析和仿真结果表明该方法不仅能保证闭环系统的稳定性,而且能提高系统的稳态精度.     

线聚焦——实现实用X射线激光饱和输出的关键技术

自从X射线激光问世以来，在产生机制从准稳态到瞬态，抽运方式从横向抽运到纵向抽运，再到全新的掠入射抽运方式的过程中，大增益的饱和输出一直是研究的根本目标．线聚焦问题是实现辐照均匀化进而达到饱和输出的关键．伴随着抽运方式的发展，先后出现了一系列对应的线聚焦器件，取得了不错的线聚焦效果．文章对X射线激光发展历史上出现的主要线聚焦器件进行了总结。     

Multi-product production planning: A goal programming approach

Cost minimization multi-product production problems with static production resource usage and internal product flow requirements have been solved by linear programming (LP) with input/output analysis. If the problem is complicated by interval resource estimates, interval linear programming (ILP) can be used. The solution of realistic problems by the above method is cumbersome. This paper suggests that linear goal programming (LGP) can be used to model a multi-product production system. LGP's unique modeling capabilities are used to solve a production planning problem with variable resource parameters. Input/output analysis is used to determine the technological coefficients for the goal constraints and is also used to derive an information sub-model that is used to reduce the number of variable resource goal constraints. Preliminary findings suggest that the LGP approach is more cost-efficient (in terms of CPU time) and in addition provides valuable information for aggregate planning.     

XeCl激光泵浦高压氢的衍射极限SRS斯托克斯光输出

利用XeCl准分子激光在高压氢中产生受激喇曼散射获得峰值功率为0.2MW、衍射极限发射角的一阶(353nm)斯托克斯输出,井研究了泵浦激光发散角对受激喇曼散射转换效率的影响.     

Information exchange between independent stochastic systems

We considerN independent, linear, Gaussian stochastic systems, each controlled by a decision maker having independent measurements on his own system. The decision makers agree to cooperate in order to minimize a weighted sum of their own independent quadratic performance indices. For this, they may or may not exchange their measurements on line. If further constraints (such as the restriction to memoryless feedbacks) are imposed, an example shows that the best solution is not always decentralized; that is, exchanging information really improves the overall performance. Moreover, some properties of the best decentralized feedbacks are investigated; they are local minima in a more general class and even absolute minima in particular situations.This research was supported by CNRS, France, Contract No. ATP-2340. The topic of this paper was presented at a Symposium on Management Science, Optimization of Dynamic Problems, held at the European Institute for Advanced Studies in Management, Brussels, Belgium, 1978. The author is grateful to Prof. P. Bernhard and Dr. J. P. Quadrat for helpful discussions.     

非线性介质F－P干涉仪光束输出特性的理论研究

本文对准直光束射入含有非线性介质的Ｆ－Ｐ干涉仪内的光场分布进行了研究．由于非线性介质与光的作用，从Ｆ－Ｐ干涉仪出射的光束截面上的相移随位置的改变呈一定的分布，进而引起了干涉仪的透射率和输出光束重新分布。当干涉仪两个面的反射系数较大时，输出光束截面出现光强和相移的跃变．这种现象与以前在平面波假设下所得的光强分布所得结论有较大的不同．