大数据迁移研究

随着信息采集机制的演变,存储和数据库技术的进步,产生了大量异构信息,整合和使用这些信息成为了巨大的挑战。大数据是指庞大的,有异质数据字典且包含复杂操作的数据。数据迁移是指将数据从一个系统或多个系统迁移至一个新环境的过程。大数据由于自身的特点,迁移过程极其复杂,需要一个行之有效的方法和系统来管理这个过程。本文就是探讨如何行之有效的进行大数据的迁移,并确保信息迁移的完成以及数据的高准确性和一致性。     

审计数据处理实验中的模拟数据生成系统

阐述了数据生成系统在计算机审计数据处理中的重要作用,分析了数据生成系统的功能和原理,并用Visual Basic 6.0实现了数据生成系统,论证了数据生成系统在计算机审计数据处理方法中的应用。研究表明,数据生成系统弥补了实际数据的不足,可以生成所需的实验数据,有助于审计数据处理方法的研究。     

基于数据中台的产业数据治理系统的设计与实现

文章提出了基于数据中台的产业数据治理系统,介绍了系统总体架构,详细阐述了数据采集、数据清洗、数据融合以及数据服务等功能.通过系统建设,解决产业数据分散和产业数据分析欠缺等问题,提升产业数据治理能力.     

可扩展和可交互的数据清洗系统

可扩展性和可交互性是数据清洗系统的主要特征。为了说明此系统的特点,列举产生异常数据的原因,用系统框架图来解释各个功能模块,提出用统计学等方法检测异常数据,针对不同类型的异常数据提出相应的清洗策略,并说明如何评估算法的优良性和数据准确性,最后用流程图来说明整个系统。人口数据清洗结果显示人口数据质量大幅度提高了,同时也证明此系统有很高的执行效率。     

基于Web的大数据可视化系统

随着互联网技术的不断发展,各行业数据呈爆发式增长。为了使企业更加方便有效利用这些数据,数据可视化系统应运而生。但是,现有的数据可视化系统大部分针对特定场景开发,易用性差、学习曲线长、维护成本较高。笔者提出的基于Web的大数据可视化系统,具有灵活的交互方式,使用户在丰富图表类型的基础上,快速实现数据可视化,并支持本地CSV上传和JDBC数据源连接。该系统以组件化的方式进行开发,提高了开发效率和系统可维护性。     

大数据机器学习系统综述

机器学习需要有大量的背景数据作为训练集,而大数据技术正好给机器学习带来了这样的大量数据训练集。结合机器学习和大数据技术,为了实现高效的大数据机器学习而设计的大数据机器学习系统面临着诸多的技术问题。大数据机器学习系统成为大数据技术和机器学习领域研究的重要课题。本文介绍了大数据机器学习系统应该具有的概念、特征及相关典型的大数据机器学习系统。     

基于CIMISS的省级气象业务系统的应用设计

全国综合气象信息共享平台(CIMISS)为全国气象部门提供了统一的数据环境。讨论了基于CIMISS数据环境建立的省级气象业务系统应用设计方案,在不改变省级现有气象业务系统业务流程和系统架构的基础上对系统进行改造,实现本地化系统与CIMISS系统的无缝对接。设计方案中,利用数据接口获取气象数据,并根据数据结构的不同分别讨论了离散数据、网格化数据、栅格数据的解析方式,最后实现气象数据的高效快速可视化。结果显示,建立的CIMISS在省级气象业务系统中的应用流程和方案是有效和可行的,为气象业务系统接入CIMISS数据环境提供一定的借鉴和参考。     

基于ETL工具的数据集成和交换的研究

数据的集成与交换,对企业的管理和决策意义重大.数据集成和交换必须解决抽取、转换和加载,但过去的异构系统很难实现,从需求分析、系统设计和系统实现3个方面,设计了一种针对数据抽取、转换和装载(Extract、Transform、Load)的ETL工具.根据ETL工具的综合要求,通过结构化分析需求,构建了系统逻辑模型;设计了...     

基于嵌入式MPP系统的数据操作策略研究

针对一种完全国产化的嵌入式MPP系统,通过抽象出系统的数据空间划分、确定系统的数据访问方式以及建立系统的数据映射机制,提出了与体系结构相适应的、与存储方式无关的数据操作策略。实验结果表明,该数据操作策略能够实现异构系统间高效、正确地数据交换。     

多节点动态复制结构的容灾系统的研究与实现

针对容灾系统集中式复制结构存在的单点瓶颈和扩展性差等不足,提出了基于动态层次化结构的多节点数据复制容灾系统,将复制节点之间的拓扑结构抽象为图,根据实时刷新的网络时延矩阵,实时动态重建复制系统的复制结构。论述了维护层次化节点的稳定性和系统的稳定性,以及通过发送增广原子数据与增广DCM数据以实现容灾系统广义数据一致性的方法。     

一种高安全的校园多功能一卡通设计

介绍了一种以浏览器／服务器(B／S)体系、三层次结构(用户界面、Web服务器和应用服务器、数据库服务器)为基础的“校园一卡通”系统。该系统在有三层安全防护的基础上实行分布式入侵检测系统的监控,使系统具有自诊断、修复和重构的能力,比传统系统具有更高的安全性能。该系统还有良好的易用性、可扩展性,具有广阔的应用前景。     

Manufacturing system application of a knowledge based simulation

The flexibility in a modern manufacturing facility introduces complexity to the decision making. The requirement for a real time control mechanism results in a need for an on-line simulation system that can simulate the complicated scheduling, routing and similar decisions required by the system.

This paper describes a knowledge-based simulation and control system written in PROLOG. This system is composed of four parts: a static data base, a dynamic database, a modeling knowledge part, and a simulation driver. The simulator contains the actual control mechanism of the physical system and can be removed from the system in order to simulate it.

The manufacturing system under investigation is a combination of flexible manufacturing cells that feed an automated assembly station. The knowledge-based simulation helps to develp and understand control mechanisms for that system, which can later be implemented in the physical system as the controller.     

RBE: A Rule-by-example Active Database System

In an active database system, rules are used to monitor and respond to events that happen inside the database. This paper presents the implementation of an active database system called RBE. The system loosely couples an OPS5 production system and an INGRES database management system to efficiently monitor databases on complex conditions. In this system, atable-based Rule-By-Example (RBE) language, is designed. The internal representations of the RBE rule language are production rules; therefore, rules can be stored, managed and tested efficiently by using the well-developed pattern matching algorithm in a production system. In other words, the system applies a production system and a special production system program to the task of query rewrite trigger processing. Moreover, a user-friendly interface is used to loosely couple the OPS5 rule system with the INGRES DBMS. The architecture used in this system shows the applicability of constructing an active database system by integrating any production system and any database system. Moreover, the proposed technique could be used as an implementation method for a query-rewrite rule system inside a DBMS server, not using a layered approach. © 1997 by John Wiley & Sons, Ltd.     

二阶自治广义Birkhoff系统的奇点分析

建立二阶自治广义Birkhoff系统的微分方程.给出该系统的线性化方程,得到该线性方程转化为梯度系统的条件,利用梯度系统的性质对线性系统的奇点进行了分析,然后再利用Perron定理探讨了相应的非线性系统的奇点类型.结果表明,如果线性系统能成为梯度系统,那么相应的非线性系统的奇点可能是结点或者鞍点.     

Design of an auditory guidance system for the blind with signal transformation from stereo ultrasonic to binaural audio

We have designed an auditory guidance system for the blind using ultrasonic-to-audio signal transformation. We first investigated the system requirements, and designed a simple but useful portable guidance system for the blind. The system derives visual information using multiple ultrasonic sensors, and transforms it to binaural auditory information using a suitable technique. The user can recognize the position of obstacles and the surrounding environment. The system is composed of two parts. One is a glasses-type system, and the other is a cane-type system with guide wheels. The former functions as an environment sensor, and the latter functions as a clear-path indicator. Wide-beam-angle ultrasonic sensors are used to detect bojects over a broader range. The system is designed as a battery-supplied portable model. Our design is focused on low power consumption, small size, light weight, and easy manipulation.     

基于MAS的网络坦克作战系统体系结构分析

网络坦克作战系统是一个复杂系统,对这一系统的研究实质上是一个复杂问题的求解过程.Agent技术为此提供了模块化及抽象化的问题求解方法.将网络坦克作战系统从功能结构的角度进行了模块化分割,提出了一种基于多Agent系统(MAS)的体系结构,将系统中的协作Agent分为5类:指挥决策Agent、局域协调控制Agent、分队级协调控制Agent,系统重构Agent和评价Agent,对这种体系结构进行了分析与研究.     

Control of a man-machine system interacting with the environment

This paper proposes an alternative control algorithm for a mechanical system having direct mechanical interaction with an environment and an operator. A robot for man-robot cooperation, an extender, a human amplifier and a powered steering system are examples of such a system. How to control the interaction in a desirable manner is one of the key issues for such a system. We first model the mechanical system, which has interaction with the environment and the operator, then propose a control algorithm based on the dynamics of the operator and the environment. The proposed control system consists of two controllers: one generates the desired motion of the mechanical system based on the force applied to the system, and the other one controls the interaction between the system and the environment. The proposed control algorithm specifies both the force augmentation and the maneuverability of the system. The algorithm is applied to a planar link mechanism with one degree of freedom. The experimental results illustrate the effectiveness of the proposed control algorithm.     

On feedback controllers

The two main results are the necessary and sufficient conditions for the existence of a causal and a strongly causal feedback controller which realizes a given behaviour on a given system. The proofs are constructive. If the given system is a discrete event system or an ordinary discrete event system, then a controller could also be a discrete event system or an ordinary discrete event system, respectively. The results are given using an algebraic approach to the modelling of general time systems introduced by the author.     

电厂燃料管理系统解决方案

电厂燃料管理系统的开发目标是建立一套完整、科学的燃料计算机管理体系,通过此系统的建立达到信息传递快捷准确,各部门沟通协调融洽的目的,提高燃煤数据对生产经营决策的支持能力,从而降低生产成本。整个系统从煤炭进厂、称重、卸煤验收、煤样制备、入厂煤化验、入厂煤电算化结算和数据统计发布整个过程进行管理。方便各级管理人员对煤的各种数据指标进行查阅、统计。采用C/S模式对整个系统进行了设计和开发,实现了燃料的全过程计算机管理,提高了工作率,为电厂逐步实现网络化奠定了良好的基础。