携号转网发展历程

携号转网服务已在全球80多个国家和地区实施,大部分国家将携号转网作为一项用户的基本服务。但实现携号转网是一项复杂的系统工程,不仅涉及技术的实施、更涉及业务和管理等多个方面。我国携号转网服务从试点试验到2019年全国开展已历经10年,分多个阶段逐步开展,并从系统建设、政策标准、技术方案等多方面开展研究和试验,探索了一套符合我国国情的技术和管理解决方案。随着携号转网的全国开展,携号转网整体服务将不断完善。     

基于SPCE3200藏、汉、英电子点菜系统的设计

基于西藏地区旅游业的迅速发展以及其带动下的西藏餐饮行业的实际需求,采用SPCE3200微控制芯片,外扩Zigbee模组和TFT液晶模组,结合嵌入式设计方法,设计出了具备藏、汉、英三种语言文字的实时点菜系统,旨在为中外游客在藏旅游时提供方便快捷的餐饮服务。实际测试结果表明,该系统反应快速、客户服务端与后台主机端网络互联简单且稳定、菜单及顾客的需求信息做到了准确的收发,符合西藏餐饮业的实际需求,适合在西藏地区推广。     

PRIME: An operational model for a hospital automated information system

PRIME is an acronym for a subject-oriented computer-based information storage and retrieval system which uses variable length, variable content, natural language, data collection forms. PRIME was developed as a model of a hospital automated information system and has been in operation since March 1965. Experience with this model system has shown that it is important to spend time planning the management and use of the computer system before the system is installed. Education programs for medical staff members and researchers are well worth the effort because it does take effort to get professional staff members to use a computer system. Data collection forms should be designed by the individual who uses them. It helps him to organize his thoughts about his project. Some conclusions about the administrative aspects of an automated information system in a hospital are presented.     

FTMP—A highly reliable fault-tolerant multiprocess for aircraft

FTMP is a digital computer architecture which has evolved over a ten-year period in connection with several life-critical aerospace applications. Most recently it has been proposed as a fault-tolerant central computer for civil transport aircraft applications. A working emulation has been operating for some time, and the first engineering prototype is scheduled to be completed in late 1979. FTMP is designed to have a failure rate due to random causes of the order of 10^-10failures per hour, on ten-hour flights where no air-borne maintenance is available. The prefered maintenance interval is of the order of hundreds of flight hours, and the probability that maintenance will be required earlier than the preferred interval is desired to be at most a few percent. The design is based on independent processor-cache memory modules and common memory modules which communicate via redundant serial buses. All information processing and transmission is conducted in triplicate so that local voters in each module can correct errors. Modules can be retired and/or reassigned in any configuration. Reconfiguration is carried out routinely from second to second to search for latent faults in the voting and reconfiguration elements. Job assignments are all made on a floating basis, so that any processor triad is eligible to execute any job step. The core software in the FFMP will handle all fault detection, diagnosis, and recovery in such a way that applications programs do not need to be involved. Failure-rate models and numerical results are described for both permanent and intermittent faults. A dispatch probability model is also presented. Experience with an experimental emulation is described.     

基于嵌入式技术的藏汉英无线电子点菜终端的设计

基于西藏地区旅游业的迅速发展以及其带动下的西藏餐饮行业的实际需求,采用SPCE3200微控制芯片,外扩蓝牙模组和TFT液晶模组,结合嵌入式设计方法,设计出了具备藏、汉、英三种语言文字的实时点菜系统,旨在为中外游客在藏旅游时提供方便快捷的餐饮服务。实际测试结果表明,该系统反应快速、客户服务端与后台主机端网络互联简单且稳定、菜单及顾客的需求信息做到了准确的收发,符合西藏餐饮业的实际需求,适合在西藏地区推广。     

Python语言的Web开发应用分析

随着人工智能时代的到来,计算机编程成为引领科技改革的主要力量,Python语言作为计算机编程技术的佼佼者,在Web开发领域有着得天独厚的优势。Python是一种通用型、解释型语言,自身带有庞大的标准库,可操作性比较强,可以快速设计出计算机程序,有效提升程序设计效率。程序员可以利用Python语言来开发Web,利用Python脚本来运行程序,利用标准库快速进行数据分析和整理,提升程序计算效率,利用Python语法结构来构建Web架构,让Web运行更加流畅,进一步推广Python编程技术。     

基于TMS320C25音频处理系统的C语言编程

这篇文章着重讨论了Ｃ语言程序在以ＴＭＳ３２０Ｃ２５为基础的处理系统中的开发和应用。详细介绍了从Ｃ源程序到适用于Ｃ２５格式的程序的开发过程，同时讨论了在开发过程中可能遇到的问题及其解决办法。同时，文章对两种编程语言在ＴＭＳ３２０Ｃ２５系统中的应用前景作了简单的比较和预测。     

基于DSP和DDS的数字立体声调频发射系统

介绍了计算机控制的数字立体声调频发射机的设计。该系统利用DSP实现数字立体声调制,并通过AD9852DDS芯片将数字信号转换成射频信号。系统采用计算机控制,接收S／PDIF接口的数字音频输出,适合校园数字调频广播和外语听力训练。     

SeSFJava harness: service and assertion checking for protocol implementations

Many formal specification languages and associated tools have been developed for network protocols. Ultimately, formal language specifications have to be compiled into a conventional programming language and this involves manual intervention (even with automated tools). This manual work is often error prone because the programmer is not familiar with the formal language. So our goal is to verify and test the ultimate implementation of a network protocol, rather than an abstract representation of it. We present a framework, called services and systems framework (SeSF), in which implementations and services are defined by programs in conventional languages, and mechanically tested against each other. SeSF is a markup language that can be integrated with any conventional language. We integrate SeSF into Java, resulting in what we call SeSFJava. We present a service-and-assertion checking harness for SeSFJava, called SeSFJava harness, in which distributed SeSFJava programs can be executed, and the execution checked against services and any other correctness assertions. The harness can test the final implementation of a concurrent system. We present an application to a data transfer service and sliding window protocol implementation. SeSFJava and the harness has been used in networking courses to specify and test transmission control protocol-like transport protocols and service.     

互联网视听节目信息搜索和分析处理系统探索

互联网视听服务已经成为最热门的互联网应用,加强视听节目内容管理已迫在眉睫。本文提出建立互联网视听节目信息搜索和分析处理系统,并阐述了该系统主要的组成部分和技术路线。本系统对视听节目信息搜索和分析处理,加强对互联网上传播视听节目的管理起到非常积极的作用。     

The Effect of Idle Server First Random Routing on the Behavior of a Finite Queue

This paper studies the effect of routing on the behavior of a finite queue which accepts batch Poisson inputs and receives service from multiple synchronous servers. Upon the arrival of a group of customers idle or pseudoidle servers will be considered first in routing decisions. Otherwise routing will be determined randomly in accordance with a preset probability distribution. Results obtained include state probability, blocking probability, delay, and throughput. Validity of analysis has been verified by computer simulations. These results can he used in evaluating the performance of a computer communication network.     

基于虚拟机思想的测控软件--通信实现

早期开发的测控软件可移植性和可维护性较差,并且在开发大型测控软件时,软件系统的建模工作难度大,系统开发周期长.HyperPanel PC Boot Direct测控软件开发系统所提供的各个开放模块适应测控软件的模块化结构,使用该系统开发测控软件不仅可以降低开发难度、缩短开发周期,而且所开发的测控软件可维护性和可移植性较好.文中首先介绍了HyperPanel PC Boot Direct开发系统的特点以及该系统所使用的开发语言--Pantalk语言,给出了利用该系统开发测控软件的流程,最后介绍了在此平台上实现的RS-232通信程序的组成模块、各模块的关系以及各个组成模块的结构,并给出了主要模块的实现技术.     

An intelligent diagnostic tool for electronically controlled diesel engine

A diagnostic tool was designed and developed based on KWP 2000 (Kingtec Standard Diagnostic Protocol on K-line). According to the KWP2000, special communication module was devised, which implemented the physical connection and level translation between personal computer (PC) and electronic control unit (ECU). Software design includes guidance service suggestion (GSS) function module and fundamental function module. GSS function module scheduled six intelligent tests: compressing test, fuel shut-off test, run up test, fuel leakage test, electrical system test and high pressure test, and received the test results and supported the search for the cause of errors in the injection system or in the engine, provided diagnosis guidance and played an important role for the service engineer in the after-sale service market. Fundamental function module implemented the following functions: communication, diagnostic trouble code (DTC) management, measuring and programming data. All those modules were designed with Visual C++ and LabVIEW languages, which provided friendly and compatible interface. This diagnostic tool has been used successfully in first generation green diesel (GD-1) high pressure common rail diesel engine, all tests showed it could realize accurate and quick data communication, online diagnostic management, real-time and dynamic measuring data refreshment, online programming data and practical GSS. It significantly improved the efficiency and convenience in after sales service aftermarket.     

基于数据库的亚控King View软件报表设计

亚控的KingView监控软件在国内监控领域中被大量应用,占有相当大的份额。KingView的监控能力强．在生成月报表、年报表时,其内置的报表功能较弱。如果处理数据量较大,生成报表时会消耗大量系统资源,此时若有突发事件需要处理,则会影响监控功能。监控中心一般配置有大容量高性能的服务器,由服务器完成处理数据生成报表的工作...     

一般通风用空气过滤器性能自动检测系统的研制

基于欧洲标准EN779:2002,研制了一套一般通风用空气过滤器性能自动检测系统,包括检测台和相应的软件。首先,简单介绍了检测台的总体布局,详述了该检测台中传感器和控制部件的选型与部署;然后,从开发语言选择、设备管理、检测过程、数据组织及报表输出等各方面说明了软件开发的思想和过程。系统经性能考核,运行稳定,能够输出符合欧洲标准EN779:2002的全套测试数据报表。     

基于大数据的信息安全处理技术的分析研究

为了解决传统技术手段效率低下的问题，可以采用以大数据为基础的信息安全处理技术来分析数据。文中首先介绍了计算机大数据的概念，然后对当前计算机大数据存在的安全问题进行了分析，最后介绍了信息安全处理技术，以提高计算机大数据处理的安全性。为解决大数据处理所带来的信息安全问题，文中以大数据为基础搭建了信息安全保障系统。该系统通过以防火墙技术和IDS（Integration Detection System）技术为核心的信息安全技术来保证数据传输过程中不会出现因病毒攻击、黑客攻击等而产生的风险。信息安全技术使用防火墙对信息和程序进行隔离处理，IDS 技术可以对信息数据进行安全处理。借助以防火墙技术和IDS技术为核心的信息安全处理技术，利用计算机大数据加密技术、密钥技术和备份技术，解决了信息采集、存储、挖掘等数据处理过程中的信息安全问题。     

投影光刻机中PDP-11主控制计算机系统的替换

介绍了针对早期的投影光刻机存在PDP-11计算机速度慢,控制系统难操作的问题,利用普通PC机通过GPIB卡替换了PDP-11计算机,使用VB语言编写的程序替换了主控制系统程序。     

云计算关键技术之虚拟化技术认知研究

在信息化浪潮席卷全球的今天,信息技术必须以更加智慧的姿态来应对复杂的未知世界.“虚拟化”作为“智慧信息技术”的重要组成部分之一,已成为当今信息产业领域最受关注的新兴概念.虚拟化针对的是IT资源,用户只接受服务或使用,在虚拟环境中实现真实功能.虚拟化常见类型有网络虚拟化,存储虚拟化,系统虚拟化,应用虚拟化等.虚拟化在体现当代智慧信息技术的云计算中,将发挥更大的作用与绩效.     

浮点FFT的VHDL实现

随着集成电路技术的发展,电子设计自动化逐渐成为重要的设计手段,已经广泛应用于数字电路和数字信号处理系统等许多领域.文中介绍了基于VHDL语言设计的浮点FFT,本设计采用基2算法,单精度32位二进制的浮点形式,主控制器采用状态机建模.整个设计利用Xilinx公司提供的先进的ISE 5.3系列软件,采用了先进的结构化设计思想.总设计通过了Modelsim仿真与验证,二十多个模块的代码覆盖率达到100%.实践结果表明,应用VHDL实现的FFT处理器可快速完成浮点数据快速傅式变换,代码覆盖率也表明系统的测试工作比较完备.该系统可扩展到16点,32点的浮点FFT运算.