多复制服务器间无阻塞的数据更新

在Client/Server系统中,服务器的可用性是提高整个系统可用性的关键,采用多复制服务器是提高系统可用性的最有希望的手段.但是,复制数据更新过程中的阻塞问题是整个系统性能的一个瓶颈.本文提出一种无阻塞的多服务器独立提交的复制数据更新方法,对于因失效不能完成更新的服务器采用协调机制使其达到相同的最终状态.     

大中型制造业集成化管理信息系统的设计与实现

文章在分析大中型造业特点的基础上,论述集成化管理信息系统的设计原理,并给出了具体的设计实例。     

大型超市POS／MIS管理信息系统设计与实现

在第三代ＰＯＳ基础上开发大型超市智能型ＰＯＳ／ＭＩＳ系统是一项新颖的课题,本文介绍基于Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ体系结构的智能型ＰＯＳ／ＭＩＳ系统的功能、结构和实现方法。     

面向物联网的基于智能合约的认证和授权方案

由于存在单点失效、规模受限等问题,传统中心化的解决方案很难满足物联网的安全需求。针对这种情况,提出一个面向IoT的基于智能合约的访问控制方案。通过引用IoT智能网关作为IoT设备的中心管理节点和公有区块链的全能节点,采用中心化与去中心化相结合、私有区块链和公有区块相结合、本地局部存储和外部公共存储相结合的方法加以实现。该方案实现IoT设备和IoT智能网关的相互认证,并实现用户对IoT设备中资源及存储在数据库中的数据的授权访问,具有去中心化、分布式优点,满足了规模性和安全性要求。     

Semantic enrichment of building and city information models: A ten-year review

Building Information Models (BIMs) and City Information Models (CIMs) have flourished in building and urban studies independently over the past decade. Semantic enrichment is an indispensable process that adds new semantics such as geometric, non-geometric, and topological information into existing BIMs or CIMs to enable multidisciplinary applications in fields such as construction management, geoinformatics, and urban planning. These two paths are now coming to a juncture for integration and juxtaposition. However, a critical review of the semantic enrichment of BIM and CIM is missing in the literature. This research aims to probe into semantic enrichment by comparing its similarities and differences between BIM and CIM over a ten-year time span. The research methods include establishing a uniform conceptual model, and sourcing and analyzing 44 pertinent cases in the literature. The findings plot the terminologies, methods, scopes, and trends for the semantic enrichment approaches in the two domains. With the increasing availability of data sources, algorithms, and computing power, they cross the border to enter each other’s domain. Future research will likely gain new momentums from the demands of value-added applications, development of remote sensing devices, intelligent data processing algorithms, interoperability between BIM and CIM software platforms, and emerging technologies such as big data analytics.     

电力系统信息安全防护研究分析

随着电力系统信息化技术的广泛应用,信息安全问题受到越来越多的关注。本文从电力系统信息安全现状入手,指出信息安全面临的问题,并重点说明了安全防护措施,确保电力信息网络的安全稳定运行。     

BCNN: Binary complex neural network

Binarized neural networks, or BNNs, show great promise in edge-side applications with resource limited hardware, but raise the concerns of reduced accuracy. Motivated by the complex neural networks, in this paper we introduce complex representation into the BNNs and propose Binary complex neural network – a novel network design that processes binary complex inputs and weights through complex convolution, but still can harvest the extraordinary computation efficiency of BNNs. To ensure fast convergence rate, we propose novel BCNN based batch normalization and weight initialization strategies. Experimental results on image and radio signal classifications show that BCNN can achieve better accuracy compared to the original BNN models. BCNN improves BNN by strengthening its learning capability through complex representation and extending its applicability to complex-valued input data. Our code is available at https://github.com/flying-Yan/BCNN.     

XDOODB：一种支持关系模型和数据库方法的OODBMS

本文所述的研究工作，是在ＯＯＤＢＭＳ中同时支持面向对象数据模型和关系数据模型，实现包括对象操作（即数据库方法）在内的同一体化对象管理，并研制了一个相应的原型系统ＸＤＯＯＤＢ。在ＸＤＯＯＤＢ中，我们设计和实现了一种基于ＳＱＬ的数据库语言ＯＳＱＬ，提出了虚拟方法的概念，实现了一种Ｃ＋＋预编译器，使之可自动产生虚拟方法体，所提供的方法服务器以对用户透明的方式可进行数据库方法的存储、动态加载和运行，并采用     

基于无线网络的城市能耗远程智能管理系统的设计和实现

提出并研究了一个基于现有无线通信网络的城市能源远程智能管理系统的设计和实现。该系统包括无线网络7号信令的研究,以及在能源计量单元上的实现、远程自动抄表、基于B/S的系统设计方案、系统组成、工作原理、功能以及技术性进行了重点论述。该系统通过客户端采集设备采集、验证、整理数据,通过无线网络与服务端设备通信,同时也接受服务端设备的管理。     

Smart TV: are they really smart in interacting with people? Understanding the interactivity of Korean Smart TV

Smart TV (STV), a new digital television service, has been rapidly developing, particularly in Korea. With the conceptual model of interactivity, this study empirically investigates the effects of perceived interactivity on the motivations and attitudes towards STV in Korea. The model is created to validate the relationship of perceived interactivity to performance, attitude and intention. Further, the model examines the mediating roles of perceived interactivity in the effect of performance on attitude towards STV. Empirical evidence supports the mediating role of perceived interactivity. Implications of the findings are discussed in terms of building a theory of interactivity and providing practical insights into developing a user-centred STV interface.