大学非英语专业高年级开设专业英语课程的探讨

中国的外语教学应在大学非英语专业高年级阶段开设专业英语课程,理由如下:1、符合语言教学的目标;2、符合“以内容为中心”的语言教学理论;3、符合外语学习中的“习得”理论;4、等同于汉语和英语专业的课程设置。本文同时指出了这一做法的可行性和困难,并提出了解决这些困难的粗浅办法。     

新型分子烙印手性功能单体的合成

本文采用β-环糊精与甲基丙烯酸缩水甘油合成一种新型具有手性分离能力的功能单体。详细讨论了反应温度，反应时问，反应溶剂对合成的影响。目标产物β-环糊精衍生物通过红外吸收光谱分析得到确定。     

学习毛泽东的思想政治工作艺术

毛泽东的思想政治工作艺术其本质是对思想政治工作的一种艺术掌握方式,是目的性和工具性的统一。毛泽东丰富多彩的思想政治工作艺术在当今时代仍然具有生命力,它是新形势下思想政治工作改进和创新的重要方法借鉴。     

A High Speed Detection Scheme for Point Targets in a Multitarget Environment

The purpose of this paper is to develop a high speed detection scheme for moving and / or stationary point targets in a multitarget environment as registered in an IR image sequence. An iterative approximate 3-D line searching algorithm based upon the geometric representation of lines (for non-maneuvering targets in space) in a 3-D space is derived. The convergency of the algorithm is proved. An analysis is performed of the theoretical detection performance of the algorithm. The statistical experiment results show high effectiveness and computational efficiency of the algorithm in the case of low SNR. The idea may be employed to satisfy the real-time processing requirement of an IR system.     

STABILITY CRITERIA FOR A CLASS OF UNCERTAINSYSTEMS WITH TIME—DELAY

Some stability criteria are obtained for a class of uncertain systems with time-delay usingLyapunov functional and analytic techniques. It is easy to check the criteria by making use of theboundedness of the uncertainties.     

静电屏蔽物理原理

本文从电场强度、电势两方面探讨了静电屏蔽的物理原理以及静电屏蔽的实质。     

Technical Notes ：STUDIES ON THE VALUE OF SECONDARY MARKET TO THE SUPPLY CHAIN

This paper investigates the impact of a secondary market, where retailers can buy and sell excessinventories, on the supply chain. We develop a two-period model with a single manufacturer and tworetailers. At the beginning of the first period the retailers order and receive products from themanufacturer, but at the beginning of the second period, they can trade surplus products betweenthemselves in the secondary market. We investigate the impact of the correlated dependence ofretailers' demand on both the quantity effect and the allocation effect under the secondary market.Lastly,we study potential strategies for the manufacturer to increase sales with the existence of thesecondary market.     

基于弯曲路径的复杂温度场重建算法仿真研究

以最小二乘法温度场图像重建算法为基础以费尔马定理为依据，对声学法工业炉温度场检测中由于声波传播路径弯曲对温度场重建所产生的影响进行了研究，给出一种实现声波路径弯曲补偿的复杂温度场重建算法，通过仿真，考察了该算法对不同温度场分布函数的重建效果，结果表明：该算法不但可实现声波路径弯曲的补偿，而且可同时进行温度场的重建，具有较高的重建精度。     

双基地声纳定位精度和算法研究

根据双基地声纳定位的特点，提出了一种单纯基于声波到达时间(TOL)的双基地声纳定位算法，给出了算法的原理和误差分布。通过数值仿真，研究了基线长度、时间测量误差对算法定位性能的影响。仿真结果表明，TOL算法的定位精度与基线长度有关，随着基线长度的增加，定位精度提高。时间测量误差对算法的定位精度影响较小。与同等条件下单基地声纳定位相比，双基地TOL算法具有更高的定位精度。该研究为多基地声纳新体制的建立，提供了理论依据。     

北京市旅游产业发展战略研究

用灰色系统关联分析方法 ,测算了北京市旅游产业及三个主要旅游行业经济要素对收益的关联序 ,找出了各行业发展的关键因素和优势因素 ,进而以此为依据提出了旅游产业投资的方向和重点 .