无线寻呼信息的计算机实时处理

在分析国际无线寻呼标准编码POCSAG(Post Office Code Standardization Adviso-ry Group)码的基础上,利用现有BB机的射频接收部分,以MCS-51单片微处理器为主体,设计了一个最小系统,实现对无线寻呼信号的射频解调、同步接收、通信纠错等处理,然后通过RS-232C标准串行接口传送到IBM-PC微型计算机中,进行信息译码,并在微机监视器上实时显示.

色散型光谱仪的通用计算机系统

通过微机技术与仪器改造技术相结合,探索了色散型光谱仪更新的新途径。以IBM微机为主系统,微机扫描控制器(MSC)为从系统,由RS-232串行通信口连接,以对话方式通讯、协议、交换信息。MSC的使用使系统具备了通用性和灵活性,在色散性光谱仪功能开发上具有广泛应用前景。该系统适用于红外、紫外、可见等色散型光谱仪。原机的测光系统与机械系统基本不变,由于增加了光谱数据处理能力,提高了光谱仪的使用性能。

AN EXPERT SYSTEM FOR SOLVENT-EXTRACTION OF RARE-EARTHS

An expert system for solvent extraction of rare earths has been developed using LISP. The goal of this project was to mimic the chemists' inferential abilities to assist in the process of solvent extraction of rare earths. The system includes frequently used extractants, separation of specific rare earths, recommendation of procedures for the separation of mixtures of rare earths using (2-ethylhexyl)phosphonic acid 2-ethylhexyl monoester, selection of parameters for counter-current extraction and methods for evaluation of the technique, and the economics of the processing. The expert system runs on an IBM-PC/XT.

Talc-bearing serpentinized peridotites from the southern Mariana forearc: implications for aseismic character within subduction zones

The serpentinized peridotites overlying the subducted zones in the Izu-Bonin-Mariana (IBM) arc system have been interpret as the cause of the low-velocity layer identified beneath the IBM froearc, in turn few earthquakes occurred along the plate boundary. Chrysotile, which is a low temperature and highly hydrated phase of serpentine with low frictional strength, has been suggested as the low velocity material in the serpentinized peridotites, besides, brucite is inferred to be likely conducive to stable sliding. However, such idea encounters challenging in our serpentinized peridotites from the southern Mariana forearc, which absent both the above minerals. The presence of talc, which characterized by its weak, low-friction and inherently stable sliding behavior, provides new clue. Here we report the occurrence of talc in serpentinized peridotites collected from the landward trench slope of the southern Mariana forearc. We infer that talc is mainly forming as a result of the reaction of serpentine minerals with silica-saturated fluids released from the subducting slab, and talc also occurs as talc veins sometimes. Due to its unique physical properties, talc may therefore play a significant role in aseismic slip in the IBM subduction zone.

Trace element composition of peridotites from the southern Mariana forearc: Insights into the geochemical effects of serpentinization and/or seafloor weathering

Peridotites from the southern Mariana forearc were sampled on the landward trench slope of the Izu-Bonin-Mariana (IBM) subduction zone by dredging. These mantle wedge peridotites underwent hydration by fluid derived from a dehydrated descending slab, and later interacted with seawater after emplacement at or near the seafloor. This study investigates how these two different rock-fluid interaction processes influenced trace element distribution in the southern Mariana forearc peridotites. We measured trace element concentrations of peridotites from the southern Mariana forearc. The southern Mariana forearc peridotites are characterized by a distinct seawater-like REE pattern with an obvious negative Ce anomaly, and La shows good correlation with other REEs (except Ce). In addition, there is a great enrichment of U, Pb, Sr and Li elements, which show a distinct positive anomaly relative to adjacent elements in the multi-element diagram. For the seawater-like REE pattern, we infer that REEs are mainly influenced by seawater during peridotite-seawater interactions after their emplacement at or near the seafloor, by serpentinization or by marine weathering. Furthermore, the anomalous behavior of Ce, compared with other rare earth elements in these samples, may indicate that they have undergone reactions involving Ce (IV) when the peridotites interacted with seawater. Positive U, Pb, Sr and Li anomalies are inferred to be related to seawater and/or fluids released during dehydration of the subducting slab.

客户／服务器环境下的OS／22·1操作系统

ＯＳ／２２·１是当今客户／服务器计算模式的首选操作系统之一。本文对ＩＢＭＯＳ／２２·１操作系统所具备的，对客户／服务器计算模式的各种支持功能作了详细的介绍。

一个数控自动编程系统的自然语言接口

本文简要介绍了一个数控自动编程专家系统的自然语言接口的实现.该自然语言接口是以我们研制的数控自动编程专家系统为背景,运行在 SUN3/4 工作站的 UNIX 下和 IBM/AT 机的 DOS 下,用 C语言编程.该自然语言接口由词法分析、句法分析、语义语用分析、目标生成和图形仿真五个模块及相应的知识库构成.该接口能够接受数控编程系统所需的对工件的英语自然语言描述并处理一些比较简单的英语语言现象.

CIM-OSA的思想及其应用

计算机集成制造系统开放式体系结构 CIM-OSA 是欧共体 ESPRIT 计划的 AMICE 协作体的研究成果,本文系统地介绍了 CIM-OSA 的内容及特点,并对 CIM-OSA 思想的应用实例 IMPACS(集成制造计划和控制系统)和 IBM 的 CIM 结构做了详细分析和阐述.

森林资源模型仿真研究

A dynamic model is built up by means of system dynamics method for the development offorest resources in Liaoning province.Prediction and strategy research are made for the fo-rest ecology and timber production in 2000 in Liaoning.The impactions of various designson the development of forest resources are understood by adjusting different parameters andadding disturbances to the model.Various parameters are determined according to the dataprovided by Land Dept.and Forestry Dept.of Liaoning province,the data of provincialforest statistics in 1978 is taken as the original values for running model,which is perfor-med on IBM PC/X7 computer in DYNAMO language of system dynamics.

数控自动编程专家系统

本文简要地介绍了数控自动编程专家系统.其中包括:专家系统知识表示的形式;分层次的黑板结构;前向推理求解策略和相应的解释功能;系统针对不同类型的曲线组合,采用不同的独立的知识源(KS)进行处理.由于在知识的处理上采用编码技术,在前向推理求解策略中使用启发信息和“剪技”技术,提高了系统的时空效率.系统中的规划程序能自动规划切削路径.输出供数控车床使用的 NC 代码,并可在显示屏上进行图形显示和切削仿真.目前原型系统已经在 IBM-PC 和 Sun3/60计算机上利用FORTRAN 语言实现.

一个面向OA的印刷汉字OCR实用系统

本文叙述一个采取以“统计模式识别”为主,以“结构模式识别”方法为辅的识别技术路线实现的以办公室自动化(OA)为应用环境的一级印刷汉字文本识别系统。该系统从实用化角度出发,采用页式文本图象扫描输入。输入后将图象文本分割成单个汉字,并根据汉字的结构特点,抽取了汉字的内层,外层,局部等多个特征。识别采用多级分类方法。识别结果形成一个国标区位码文件。系统软件建立了一种与用户间的友好界面。该系统是在IBM PC/XT上实现的,对印刷字样识别率>99％,对各类实际的办公行文其统计识别率>95％,识别速度为1～2字/秒。

机器人规划与编程系统的研究

机器人的程序设计问题是智能机器人研究的重要方面。也是自动程序设计的一个重要方面。给定一个机器人的任务描述。应该能够得一个完整的程序代码（用某种程序设计语言书写）。本文描述了一个这样的系统－LRPS。LRPS用一种比较简单的任务描述语言TOL（Task-Oriented Language）来接收用户的任务描述，然后经过分析。规划，最后生成一段用VAL语言编写的程序代码，系统能够给出机器人的宏动作序列－－机器人规划。并能对若干知识库进行操作。在规划器中采用了一种新的称为插入法的方法来进行规划，整个系统在IBM－PC机上用PASCAL语言实现。

水下机器人动态定位系统的研究

本文全面地介绍了动态定位系统的发展过程。探讨了在我所研制的水下机器人HR01上实现动态定位功能的可能性。并提出了两种新的控制方案，且在微机IBM PC－XT上做了仿真工作，给出了仿真结果。第一种方案是基于单回路技术。先用前馈解耦网络去耦，再按单回路进行综合。而后加入螺旋浆的饱和及死区非线性。针对这两种非线性提出了两种新的解决方法。理论分析及仿真结果表明，该两种方法对克服这两种非线性极为有效，达到了理想的控制效果。第二种方案则是基于滑动控制理论思想。该方法具有解耦特性，抗参数时变特性及能够对非线性系统直接设计的优点。对水平机器人来说是一种比较好的方法。本人将该方法成功地应用在水下机器人的航向控制。并对不同参数的对象进行了仿真实验。结果表明该方法对参数变化有强鲁椿性，达到了相当满意的控制效果。

VAL-II系统通讯功能的研究与开发

VAL-II是当今世界上得到广泛应用的一种高级机器人控制系统和编程语言，尤以其卓越的管理通讯功能越来越受到广大用户的欢迎。它采用DDCMP协议的一个子集，通过计算机局部网络来支持与管理计算机的通讯，管理计算机能完全监控VAL-II系统的运行，为离线编程和面向任务型控制创造了条件。基于对PUNA 562机器人中的VAL-II系统目标代码的剖析，本文用IBM PC/AT计算机成功地开发出了VAL-II通信子系统的中层和底层，并与Unimation 公司的DDCMP 和 TESTDDC测试程序进行了联调，证实了其有效性。本文介绍了该子系统的结构，功能及其运行结果。

波动方程叠前深度偏移辛算法及速度建模

On 70~(th) SEG Annual meeting, many author have announced their result on the wave equation prestack depth migration. The methods of the wave-field imaging base on wave equation becomes mature and the main direction of seismic imaging. The direction of imaging the complex media has been the main one of the projects that the national "85" and "95" reservoir geophysics key projects and "Knowledge innovation key project of Chinese Academy of Science" have been supported. Furthermore, we began the study for special oil field situation of our nation with the international research groups. Under the background, the author combined the thoughts of symplectic with wave equation pre-stack depth migration, and develops and efficient wave equation pre-stack depth migration method. The purpose of this work is to find out a way to imaging the complex geological goals of Chinese oilfields and form a procedure of seismic data processing. The paper gives the approximation of one way wave equation operator, and shows the numerical results. The comparisons have been made between split-step phase method, Kirchhoff and Ray+FD methods on the pulse response, simple model and Marmousi model. The results shows that the method in this paper has an higher accuracy. Four field data examples have also be given in this paper. The results of field data demonstrate that the method can be usable. The velocity estimation is an important part of the wave equation pre-stack depth migration. A parallel velocity estimation program has been written and tested on the Beowulf clusters. The program can establish a velocity profile automatically. An example on Marmousi model has shown in the third part of the paper to demonstrate the method. Another field data was also given in the paper. Beowulf cluster is the converge of the high performance computer architecture. Today, Beowulf Cluster is a good choice for institutes and small companies to finish their task. The paper gives some comparison results the computation of the wave equation pre-stack migration on Beowulf cluster, IBM-SP2 (24 nodes) in Daqing and Shuguang 3000, and the comparison of their prize. The results show that the Beowulf cluster is an efficient way to finish the large amount computation of the wave equation pre-stack depth migration, especially for 3D.