高速公路大数据处理现状与挑战

高速公路在日常的运营过程中,产生了海量的、异构的数据,即大数据,这些数据还在快速的增长。大规模产生的数据,给数据的存储和分析带来了巨大的挑战,如何科学、高效的存储这些大数据,并能对其进行快捷的访问和分析,更好的服务于交通,是一个迫在眉睫的问题。首先讨论了高速公路中大数据的来源以及数据的特点,然后分析了研究大数据的意义和大数据处理技术,并分析了这些技术在高速公路大数据中分析中所面临的挑战。     

水利舆情大数据监测应用研究

随着社交媒体的发展,水利网络舆情事件的发生次数呈上升趋势,监测分析难度日益加大.为解决水利网络舆情监测问题,开发建设水利舆情大数据监测分析平台十分必要.通过对基础设施、数据资源、舆情智能分析、舆情大数据可视化4个模块的构建,水利舆情大数据监测分析平台初步实现舆情大数据监测分析能力,形成较完善的水利行业舆情大数据工作机制...     

我国大数据安全问题及对策建议研究

文章首先从大数据自身、大数据平台架构和软件、大数据技术应用等方面分析了当前我国大数据面临的网络安全挑战,其次分析了我国大数据相关法律法规、标准、技术、产业的发展现状,最后研究了我国大数据安全面临的问题,并从大数据安全标准、核心技术、人才培养三个方面提出对策建议。     

计算机软件技术在大数据时代的应用研究

先进的大数据软件技术能够高效化地处理网络、生产体系中的数据信息,深层化分析数据,挖掘出数据内在价值。处在大数据时代背景下,计算机软件运行环境大大改善,海量数据应用、传输的安全性大大提升。本研究对大数据时代下计算机软件技术进行了论述,分析了计算机软件技术及大数据技术间的关系,并总结了大数据采集、大数据存储、大数据查询、大数据可视化中计算机软件技术的应用,以期在大数据时代充分发挥计算机软件技术的优势,进一步推动计算机软件技术的优化升级,助力大数据时代和计算机行业的发展、进步。     

面向大数据的多维粒矩阵关联分析及应用

当前日益增长的大数据备受青睐,大数据的核心是数据分析。然而聚焦大数据的动态、多维特性,传统数据分析方法难以获取可靠且准确的分析结果,数据分析方法面临着重要的发展机遇和严峻的挑战。对动态大数据的多维关联性分析问题进行研究和探讨,以动态大数据为研究对象,以粒计算(Granular Computing,GrC)理论为研究基础,提出粒矩阵思想,研究构建面向动态大数据的粒矩阵方法,分析粒矩阵的逻辑约简运算,确定了基于粒矩阵的动态大数据多维关联性分析模型。本文旨在为高效利用动态大数据进行多维关联性分析和揭示数据隐含的客观规律提供科学依据,对大数据的可持续发展也具有重要意义。     

大数据应用的安全性探索

大数据具有规模大、生成速度快、种类繁多等方面的特点,大数据就是使用数据对其进行分析,并从其中挖掘出一些有效的信息进行分析,建立合理的数学模型后,得到预测结果,为企业发展提供有效的解决措施。大数据处理流程主要包含获取数据、集成数据、分析数据三个方面的内容。由于大数据本身的特征,大数据应用过程中存在一定的安全性问题。     

大数据分析流程框架的研究

随着信息技术的不断创新,信息量的不断扩大,大数据已经成为了与日常生活息息相关的话题。挖掘大数据的价值已经炙手可热,如何能够更高效、更快速地分析大数据已经成为大数据发展的重要挑战之一。近年来,学术界与工业界就大数据的分析进行了研究,取得了一些研究成果,但针对大数据分析的研究还是非常有限。文中首先从传统数据仓库与大数据时代数据仓库作了对比,引入了大数据的分析流程框架,对分析流程框架的各个部分做了一一阐述,并通过实验验证分析了流程框架的可行性。     

论大数据时代下的智慧校园建设

大数据时代下的智慧校园建设需要利用数字化校园建设积累的数据,进行智慧校园中的大数据分析。本文首先分析了大数据时代下各行业面临的机遇和挑战,然后分析了大数据时代下的智慧校园建设,最后给出了总结。     

煤炭大数据研究及发展方向

介绍了煤炭大数据的来源及特征,分析了当前煤炭大数据应用现状;阐述了煤炭大数据平台化发展对于煤炭大数据应用的意义,分析了煤炭大数据平台建设过程中在数据共享、数据质量、安全性、专业人才等方面存在的问题,提出建设煤炭大数据平台应进行顶层设计、完善煤炭数据标准体系、培养专业人才、合理设计平台框架。     

大数据科学与工程专业设置探索

针对贵州大数据产业发展的实际需情况,分析大数据的关键技术及特点,结合贵州发展和打造大数据产业的三大机遇和五大优势,对贵州大学设置大数据科学与工程专业的优势进行了分析和展望,利用更好的培养大数据产业人才。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate