GRDB: A general purpose relational database system

This article discusses the design and development of GRDB (General Purpose Relational Data Base System) which has been implemented on a DEC-1090 system in Pascal. GRDB is a general purpose database system designed to be completely independent of the nature of data to be handled, since it is not tailored to the specific requirements of any particular enterprise. It can handle different types of data such as variable length records and textual data. Apart from the usual database facilities such as data definition and data manipulation, GRDB supports User Definition Language (UDL) and Security definition language. These facilities are provided through a SEQUEL-like General Purpose Query Language (GQL). GRDB provides adequate protection facilities up to the relation level. The concept of “security matrix” has been made use of to provide database protection. The concept of Unique IDentification number (UID) and Password is made use of to ensure user identification and authentication. The concept of static integrity constraints has been used to ensure data integrity. Considerable efforts have been made to improve the response time through indexing on the data files and query optimisation. GRDB is designed for an interactive use but alternate provision has been made for its use through batch mode also. A typical Air Force application (consisting of data about personnel, inventory control, and maintenance planning) has been used to test GRDB and it has been found to perform satisfactorily.     

ASAS—a general purpose finite element analysis system

The ASAS finite element system, incorporating statics, dynamics, heat transfer and substructure analysis, is described, paying particular attention to the structure of the data required. The current range of elements is shown and examples from the available pre- and post-processing programs are listed. Details of some recent analyses are given, with computer plots of the idealizations used.     

通用FPGA实验系统的设计与应用

阐述了一种FPGA实验系统的设计思想并较为详细地介绍了PCI接口的开发。实验系统以FPGA为核心,可通过PCI、USB、串行以及网络接口和计算机交换数据。可作为逻辑分析仪、密码协处理器使用,也可用于信息安全、IC设计、嵌入式操作系统等有关的研究、开发和实验。     

A general purpose free format input data system

The paper presents a general purpose free format input data system. This free format input data system is designed and presented as an interface between the user and the parent program. The system converts user's free format input data set into the fixed format data set of the parent program. Its features include data entries free of format specifications, appearance of leading, trailing and embedded blanks in a data line, horizontal repetition of data entries, vertical repetition of data entries, data group identification, comment data lines, tab settings, i.e. skipping to predetermined fields, elimination of group terminators and teletype compatibility. Organization of the program is described in detail. Full notation, sample example problem—its input and program output, program listing with comment cards and its implementation details are also provided. This input system is ideally suited as a “front end” for a general purpose finite element program. The system has been in use with the “NISA” finite element computer program since early 1976.     

PROSOFT: a general purpose software in protein chemistry

Applesoft and 6502 Assembler software was designed to quickly perform operations commonly encountered in protein chemistry. It was not designed for a specific application but can be conveniently used to speed up the determination of protein primary structure.     

A general purpose computer analysis system for chromatographic data

A manual integration system for the analysis of chromatographic data is described. The analog output produced by an HPLC absorbance monitor is passed to a non-inverting signal amplifier. This amplified signal is sent to an IBM PC where an analog to digital converter is used to digitize the data. A set of six computer programs which collect, store and analyze these data are presented. This system was used to analyze the nucleotide content of the anaerobic organism Clostridium acetobutylicum by strong anion-exchange HPLC.     

通用测试系统硬件集成模型与集成策略

提出了通用测试系统硬件集成的策略问题,给出了系统功能分层描述,建立了数学模型,定义了性能评价指标,并对指标进行了求解,基于此构建了基于遗传算法的硬件集成策略,给出了算法步骤,并以某测试系统的组建为例,对提出的硬件集成策略和算法的可行性进行了验证,从结果可以看出提出的通用测试系统硬件集成策略具有较好的适用性、合理性和可行性。     

Towards a general purpose architecture for UI generation

Many software projects spend a significant proportion of their time developing the User Interface (UI), therefore any degree of automation in this area has clear benefits. Such automation is difficult due principally to the diversity of architectures, platforms and development environments. Attempts to automate UI generation to date have contained restrictions which did not accommodate this diversity, leading to a lack of wide industry adoption or standardisation. The authors set out to understand and address these restrictions. We studied the issues of UI generation (especially duplication) in practice, using action research cycles guided by interviews, adoption studies and close collaboration with industry practitioners. In addressing the issues raised in our investigation, we identified five key characteristics any UI generation technique would need before it should expect wide adoption or standardisation. These can be summarised as: inspecting existing, heterogeneous back-end architectures; appreciating different practices in applying inspection results; recognising multiple, and mixtures of, UI widget libraries; supporting multiple, and mixtures of, UI adornments; applying multiple, and mixtures of, UI layouts. Many of these characteristics seem ignored by current approaches. In addition, we discovered an emergent feature of these characteristics that opens the possibility of a previously unattempted goal - namely, retrofitting UI generation to an existing application.     

VISTO: A new CBIR system for vector images

In this paper, we present the main features of VISTO (Vector Image Search TOol), a new content-based image retrieval (CBIR) system for vector images. Though unsuitable for photo-realistic imagery, vector graphics are continually becoming more advanced and diffused. Vector images are fully scalable, resolution independent, not restricted to rectangular shape, allowing layering and editable/searchable text. Notwithstanding this increasing interest, the research area concerning CBIR systems for vectorial images is quite new, and our research on a vector based CBIR system actually derives from a precise request of vector based application experts that did not find appropriate solutions to their retrieval problems in customary shape-based CBIR system. To the best of our knowledge, VISTO is the first CBIR system for vector images proposed in the literature, and it supports the retrieval of images in SVG (scalable vector graphics) format.     

CBIR中的索引技术综述

总结了基于内容图像检索中索引技术的研究现状、分析比较了其性能的主要差异，同时也指出了其中存在的问题以及今后的发展趋势．     

A general purpose Monte-Carlo program

Title of program: ERRCAL Catalogue number: AAUP Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: Installation: CDC 6600 Data Center CDC, Rijswijk, The Netherlands Burroughs B 6700 Mons University Computing Center Operating system: SCOPE for CDC. MCP for Burroughs Programming language: FORTRAN IV High speed store required: 15000 words (CDC 6600) No. of bits in a word: 60 (CDC 6600) Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Card reader, line printer No. of cards in combined program and test deck: 699 Card punching code: BCD     

Combined simulation for process control: extension of a general purpose simulation tool

Combined discrete event and continuous views of production processes are important in designing computer control systems for both process industries and manufacturing. The paper presents an extension of the popular Matlab–Simulink simulation tool to facilitate the simulation of the discrete sequential control logic applied to continuous processes. The control system is modelled as a combined system where the discrete and the continuous parts of the system are separated and an interface is introduced between them. The sequential control logic is represented by a Sequential Function Chart (SFC). A SFC blockset is defined to enable graphical composition of the SFC and its integration into the Simulink environment. A simulation mechanism is implemented which is called periodically from the standard Simulink simulation engine and carries out the correct state transition sequence of the discrete model and executes corresponding SFC actions. Two simulation case studies are given to illustrate the possible application of the developed simulation environment: the simulation of a batch process cell, as an example from the area of process control and an example of a manufacturing system, i.e. the control of a laboratory scale modular production system.     

基于反馈特征权的综合CBIR系统设计*

介绍了颜色特征和纹理特征的两种图像检索。在利用单一特征检索的基础上,提出了反馈特征权的概念,通过用户对初始检索的反馈得到适合的权重,并综合利用上述两个特征与特征权重结合进行检索。对真实图像数据库的检索实验表明,基于反馈特征权的综合检索要比一般特征检索更符合人的视觉感受要求,因而检索效果更好。     

国产通用处理器密码算法指令实现研究

介绍了国际主流密码算法AES和SHA,综述了当前主流通用处理器架构的密码算法指令发展现状。为提高国产通用处理器在密码安全领域的性能,设计了面向国产通用处理器的AES和SHA密码算法扩展指令集,实现了能全流水执行的AES和SHA密码算法指令执行部件,并进行了实现评估和优化。该密码算法指令执行部件的工作频率达2.0 GHz,总面积为17 644μm²,总功耗为59.62 mW,相比软件采用原有通用指令实现,对AES密码算法的最小加速比为8.90倍,对SHA密码算法的最小加速比为4.47倍,在指令全流水执行时可达19.30倍,显著地改善了处理器执行AES和SHA密码算法的性能,有望应用于国产通用处理器并进一步提升国产通用处理器芯片在密码安全应用领域的竞争力。此外,该密码算法指令部件还可以封装成专门用于支持密码算法的IP,应用在密码安全领域的专用芯片中。