关于气井产能、气田稳产特征和气区开采潜力的探讨

根据气田开发特点和国内外开发实践，对气田平均产能评价方法、开发速度与稳产的关系以及气区开采潜力等问题进行了探讨，以提高开发评价、开发建设及投资决策的科学性与可靠性，达到高效开发和稳定供气的目的。分析评价了国内外常用的6种气井产能评价方法，指出了其适用条件。利用中国、土库曼斯坦和俄罗斯部分开发历史较长的气田开发实例分析了开发速度与稳产的关系，结果表明四川裂缝系统稳产情况最好，而土库曼斯坦气田稳产关系最差。利用俄罗斯已枯竭老气区、正在开发的大型主力气区以及中国四川开采历史较长气区的开发实例，对气区开采潜力进行综合分析和探讨，认为在预测气田（或气区）的开发潜力、稳定供气水平和年限时，要全面评价、预计尚未探明储量的规模、质量、投产时间、投产顺序以及储量的可信度和可靠性，以降低开发决策的风险，提高中、长期开发规划的科学性。图5表2参10     

浅谈我国电信企业信息化策略

我国电信企业要做大做强，信息化是必然的战略选择和有效的助力器。本文阐述了电信企业信息化的含义、现状，描绘了电信企业信息化的目标，从经济学、管理学、行为科学等学科的角度提出了我国电信企业信息化策略。     

水库浸没预测及减压井效果分析

利用地下水模拟软件系统GMS,在反推入渗系数、蒸发系数的基础上,设定合理的边界条件,建立非稳定流数学模型,模拟计算浸没范围,并论述了选取适当参数对农业区、居民区布置减压井,通过检验减压井防渍效果,得出对于典型二元结构地层,采用减压井防渍是经济合理措施的结论.     

高峰值功率重频脉冲固体激光器

综述了高峰值功率重频脉冲固体激光器的发展现状，对其中的Ｑ开关、腔倒空、锁模等窄脉冲技术和放大技术进行了分析，展示了高峰值功率重频脉冲固体激光器的发展前景。     

Failure probability evaluation for normally distributed load-strength model with unknown parameters

The failure probability evaluation methods for load-strength interference model are established when both load, L, and strength, S, follow normal distributions, assuming none of the normal distribution parameters are known. Based on Fisher's fiducial analysis, a failure probability evaluation method is obtained for single load application. A numerical integration method is developed to evaluate the failure probability for multiple load applications.     

Accurate estimation of environment parameters from ultrasonic data

This paper describes a robust and accurate ultrasonic sensing system for a mobile robot. The system continuously updates a local map of the environment in which obstacles are represented by straight lines or points in a robot centered coordinate frame. The presented algorithms use a Kalman filter for the reduction of the noise in the ultrasonic data and use a systematical error correction (‘bundle correction’) to reduce the uncertainty in obstacle direction. Experiments are carried out in simulation and with a real mobile robot system. Results show that the accuracy with which line parameters can be estimated is in the order of 1 degree for the orientation and about 2 cm for the position. The effect of the bundle correction is significant and maximal when the robot approaches walls under a small angle.     

有自聚焦功能的付里叶计算全息

在制作付里叶计算全息过程中，加入适当的二次位相因子，使此种全息图在相干光照明下就可预定的位置上只再现一个像，省略了过去丙现此种计算全息图必要的付里叶透镜，并且使两个互为共轭像分离，从而拓宽了此种计算全息的应用领域，实验结果与理论分析相符。     

Statistical computer-aided design for microwave circuits

A useful methodology for microwave circuit design is presented. A statistical technique known as Design of Experiments is used in conjunction with computer-aided design (CAD) tools to obtain simple mathematical expressions for circuit responses. The response models can then be used to quantify response trade-offs, optimize designs, and minimize circuit variations. The use of this methodology puts the designer's intelligence back into design optimization while making “designing for circuit manufacturability” a more systematic and straightforward process. The method improves the design process, circuit performance, and manufacturability. Two design examples are presented in context to the new design methodology     

淀积条件对GDa—SiNx薄膜电学特性的影响

本文讨论了用辉光放电法制备氮化硅薄膜时衬底温度、射频功率和气体流量比对薄膜的电导率、介电常数和击穿强度的影响。通过优化生长条件，制备了优质非晶氮化硅薄膜，其介电常数为７．５、击穿强度为５．５ＭＶ／ｃｍ、电导率为１０－１３（Ωｃｍ）－１。     

设置保水堰管涵输水系统的水力瞬变数值仿真

为研究大型调水工程的水力瞬变过程，采用明渠非恒定流方程及Preissiman方法模拟无压管涵非恒定流、有压管涵水击和明满交替流，提出了设置保水堰的长距离管涵输水系统的水力学仿真模型。所建立的数值模型可模拟包括管涵明满交替和保水堰跌水等复杂的水流现象。数值仿真结果表明，在检修闸门和下游管涵之间设置保水堰，可以调节输水管道内的压力，避免紧急启闭时发生液柱分离以及检修闸门突然关闭时因明满流交替而产生强烈的冲击水压。