Transputer在高速雷达视频回波采集系统中的应用

介绍以ＴｒａｎｓｐｕｔｅｒＴ４２５单片高速并行计算机为中心控制环境，与高速Ａ／Ｄ（３５ＭＨｚ，８ｂｉｔ相结合构成的实时高速雷达回波采集系统。该系统的特点是：采集速度高，存贮量大；利用标准的Ｔｒａｎｓｐｕｔｅｒ链路实时完成处理器间的数据传输和通讯；系统采用并行Ｏｃｃａｍ语言编程。这样既充分发挥处理器的并行功能，又使数据采集和数据处理同步进行，这在实时信号采集与处理系统中具有特别重要的意义。     

Qualitative representation of spatial knowledge in two-dimensional space

Various relation-based systems, concerned with the qualitative representation and processing of spatial knowledge, have been developed in numerous application domains. In this article, we identify the common concepts underlying qualitative spatial knowledge representation, we compare the representational properties of the different systems, and we outline the computational tasks involved in relation-based spatial information processing. We also describesymbolic spatial indexes, relation-based structures that combine several ideas in spatial knowledge representation. A symbolic spatial index is an array that preserves only a set of spatial relations among distinct objects in an image, called the modeling space; the index array discards information, such as shape and size of objects, and irrelevant spatial relations. The construction of a symbolic spatial index from an input image can be thought of as a transformation that keeps only a set of representative points needed to define the relations of the modeling space. By keeping the relative arrangements of the representative points in symbolic spatial indexes and discarding all other points, we maintain enough information to answer queries regarding the spatial relations of the modeling space without the need to access the initial image or an object database. Symbolic spatial indexes can be used to solve problems involving route planning, composition of spatial relations, and update operations.     

A semantic modeling approach for image retrieval by content

We introduce a semantic data model to capture the hierarchical, spatial, temporal, and evolutionary semantics of images in pictorial databases. This model mimics the user's conceptual view of the image content, providing the framework and guidelines for preprocessing to extract image features. Based on the model constructs, a spatial evolutionary query language (SEQL), which provides direct image object manipulation capabilities, is presented. With semantic information captured in the model, spatial evolutionary queries are answered efficiently. Using an object-oriented platform, a prototype medical-image management system was implemented at UCLA to demonstrate the feasibility of the proposed approach.     

弹载红外图象处理器中多CPU之间通信方法的研究

弹载红外图象处理器是一个复杂的实时红外图象处理系统。由于它的计算量很大，实时性很强，单ＣＰＵ已经不可能完成如此繁重的任务。本文分析了弹载红外图象处理器中多ＣＰＵ之间通信的几种方法。在分析几种通信方法的原理和各自的优缺点之后，提出了弹载红外图象处理器中多ＣＰＵ之间通信应采用双口ＲＡＭ作共享存储器的并行通信方法，我们所设计的系统中均采用这种方法。实验证明这种方法的数据信息通信具有很高的灵活性和可靠性，完全满足弹载红外图象处理器中多ＣＰＵ之间通信的要求。     

绝缘涂敷制件的加工工艺研究与应用

主要论述了电工绝缘粉末的性能及其在高压电器设备应用中的有关试验项目。     

晋城市煤炭加工利用现状、存在问题及发展建议

阐述了晋城市煤加工利用的现状 ,分析了煤炭加工利用存在的问题 ,提出了今后的发展建议     

C/O能谱测井数据预处理的两点改进意见

简单介绍了碳氧比测井的原理及通常的数据处理方法。分析了由常规数据处理所得曲线仍然存在的问题及可能的成因 ,并给出了可行的修正办法。讨论了另一种可行的曲线异常数据的检测、剔除方法。实践表明 :文章讨论的两点建议都是可行的 ,并且在提高测量曲线质量的同时也提高了地层含油饱和度的解释精度。     

现场总线技术在城市污水处理与气象中的应用

文章主要讨论了LonWorks现场总线技术在城市污水处理厂和气象指数预报中的应用。采用IPC和PLC控制结构对现场的各种设备实现控制和数据的采集，通过现场总线网络传输数据到中心控制室或远程终端，实现污水处理的自动控制和气象信息的实时采集和处理。     

Image processing using cellular neural networks based on multi-valued and universal binary neurons

Multi-valued and universal binary neurons (MVN and UBN) are the neural processing elements with the complex-valued weights and high functionality. It is possible to implement an arbitrary mapping described by partially defined multiple-valued function on the single MVN. An arbitrary mapping described by partially defined or fully defined Boolean function, which can be non-threshold, may be implemented on the single UBN. The quickly converging learning algorithms exist for both types of neurons. Such features of the MVN and UBN may be used for solving the different problems. One of the most successful applications of the MVN and UBN is their usage as basic neurons in the Cellular Neural Networks (CNN). It opens the new effective opportunities in nonlinear image filtering and its applications to noise reduction, edge detection and solving of the super resolution problem. A number of experimental results are presented to illustrate the performance of the proposed algorithms.An erratum to this article can be found at