数字图书馆云服务平台的研究

分析云计算环境下数字图书馆云服务平台的基本框架、云服务模式和云服务途径,它符合不同云读者需求,具有较低的成本投入,安全、可扩展和即时开展服务的特点。     

云平台的4A系统实现方式研究

本文针对云平台的特点,研究云平台纳入4A系统的建设方案,并对各种不同的方案进行了分析比较。对于推进4A系统的建设有着极为重要的意义。     

基于物联网与云计算服务的农业温室智能化平台研究与应用

以建设智能化温室物联网为目标,提出温室物联网服务平台技术方案.该方案包括技术架构、温室环境智能监控系统、无线传感网及通信终端、智能控制终端和无线传感网及通信终端,智能控制终端.设计了温室环境监控软件,视频监控系统,农业小气候监测系统,监控中心,实现了温室群的数据存储、管理控制和云数据分析等功能.提高了温室生产的精细化作业水平.     

Molecular image-processing devices based on chemical reaction systrems. 3: Some operational characteristics of excitable light-sensitive media used for image processing

Operational features of excitable Belousov–Zhabotinsky-type light-sensitive media that can be used to implement image-processing operations are discussed. They embrace (i) the main primitive responses of such media to light excitation as a function of medium acidity, temperature and light exposure, (ii) the characteristics of temporal evolution of stored media and (iii) the resolution and information content inherent in images stored by excitable media. It is shown that controlling the acidity of the medium, its temperature and the duration of light exposure enables one to get reproducible results.     

基于云计算的数据挖掘平台架构及其关键技术研究

近年来,随着经济的飞速发展,社会逐渐步入信息化社会。相比传统数据挖掘系统,基于云计算的数据挖掘平台是新时代的科技产物,具有得天独厚的优势,其处理海量数据的能力、面向服务、高度扩展性等特点受到各行各业广泛的关注和认可。文章首先概述了云计算的概念以及服务范围,之后分析基于云计算的数据挖掘平台架构,并且提出相关的技术指导建议。     

面向全业务接入的XG-PON网络部署策略研究

随着全业务接入的发展,用户对接入带宽的需求越来越高。XG-PON能够提供更高的接入速率,支持更大的分路比,覆盖更多的用户,是运营商实现宽带接入提速的热门技术。针对接入网需求的变化,本文基于对GPON和XG-PON上下行接入能力的分析,研究并给出XG-PON的网络部署策略。本文所提策略能够有效指导运营商在面对全业务接入快速增长的形势下及时调整接入网络结构,为用户提供更好的网络体验。     

A real time expert system for anomaly detection of aerators based on computer vision and surveillance cameras

Aerators are essential and crucial auxiliary devices in intensive culture, especially in industrial culture in China. In this paper, we propose a real-time expert system for anomaly detection of aerators based on computer vision technology and existing surveillance cameras. The expert system includes two modules, i.e., object region detection and working state detection. First, we present a small object region detection method based on the region proposal idea. Moreover, we propose a novel algorithm called reference frame Kanade-Lucas-Tomasi (RF-KLT) algorithm for motion feature extraction in fixed regions. Then, we describe a dimension reduction method of time series for establishing a feature dataset with obvious boundaries between classes. Finally, we use machine learning algorithms to build the feature classifier. The proposed expert system can realize real-time, robust and cost-free anomaly detection of aerators in both the actual video dataset and the augmented video dataset. Demo is available at https://youtu.be/xThHRwu_cnI.     

基于ERP应用平台企业业务流程重组问题探究

随着计算机网络技术的发展,企业为了能够在激烈的竞争中占据优势,纷纷建立了以ERP为基础的企业信息化应用平台,来提高企业综合管理水平。本文阐述了ERP系统的构建以及企业业务重组的BPR理论,分析了ERP和BPR整合的必要性,通过分析,为企业提高经济效益与竞争能力起到积极推动作用。     

一种远程应急通信软件无线电平台设计

介绍一种使用 FPGA 芯片进行处理控制,基于软件无线电技术制作的远程应急通信平台.该平台利用数字正交调制原理进行调制解调,并给出硬件设计和代码编写方案.经过实际检验可以达到预期效果     

The correlation of the electrical properties with electron irradiation and constant voltage stress for MIS devices based on high-k double layer (HfTiSiO:N and HfTiO:N) dielectrics

This paper describes the influence of e-beam irradiation and constant voltage stress on the electrical characteristics of metal-insulator-semiconductor structures, with double layer high-k dielectric stacks containing HfTiSiO:N and HfTiO:N ultra-thin (1 and 2 nm) films. The changes in the electrical properties were caused by charge trapping phenomena which is similar for e-beam irradiation and voltage stress cases. The current flow mechanism was analyzed on the basis of pre-breakdown, soft-breakdown and post-breakdown current-voltage (J-V) experiments. Based on α-V analysis (α=d[ln(J)]/d[ln(V)]) of the J-V characteristics, a non-ideal Schottky diode-like current mechanism with different parameters in various ranges of J-V characteristics is established, which limits the current flow in these structures independent of irradiation dose or magnitude of applied voltage during stress.     

Robot and its living space: A roadmap for robot development based on the view of living space

Robots, as the creation of humans, became an irreplaceable component in human society. With the advancement of technologies, robots have become more and more intelligent and have been widely used in many fields, such as disease diagnosis, customer services, healthcare for the older people, and so on. As robots made our lives much more convenient than ever before, they also brought many potential risks and challenges in technology, security, and ethic. To better understand the development of robots, we proposed a concept of a robot’s living space and analyzed the role of robots in our society. In this paper, we focus on setting a theoretical framework of the robot’s living space to further understand the human-robot relationship. The research in this paper contains three central aspects. First, we interpret the concept of the robot’s living space and the functions of each space. Second, we analyze and summarize the relative technologies which support robots living well in each space. Finally, we provide advice and improvement measures based on a discussion of potential problems caused by the developments of robots. With the trend of robots humanization and human-robot society integration, we should seriously consider how to collaborate with intelligent robots to achieve hybrid intelligence. To build a harmonious human-robot integrated society, studying the robot’s living space and its relationship with humans is the pre-requisite and roadmap.     

Nanostructured thin films based on TiO2 and/or SiC for use in photoelectrochemical cells: A review of the material characteristics,synthesis and recent applications

In solar energy harvesting research, there is growing interest in the study of photoelectrochemical (PEC) properties of the following classes of semiconductor materials: metal oxides and silicon-based compounds. The motivation is that such materials are being successfully used as photoelectrode in PEC cells. Special attention has been given to the wide band gap materials. This review discusses, from the material science perspective, the recent literature relating to two wide band gap semiconductor materials: one metal oxide, titanium dioxide (TiO₂), and one silicon-based compound, silicon carbide (SiC). Emphasis is placed on TiO₂ and SiC thin films for PEC applications. Materials characteristics, synthesis methods and recent photocatalytic applications are presented. Finally, the interesting effect of the efficiency increase of PEC devices developed from a hetero-junction of TiO₂ and SiC is discussed.     

An application of meta-heuristic and nature-inspired algorithms for designing reliable networks based on the Internet of things: A systematic literature review

The widespread use of Internet of Things (IoT) in various wireless sensor networks applications has increased their importance in recent years. IoT is a smart technology that connects anything anywhere at any time. These smart objects, which connect the physical world with the world of computing infrastructure, are expected to permeate all aspects of our daily lives and revolutionize a number of application domains such as healthcare, energy conservation, and transportation. As wireless networking expands, the disadvantage of wireless communication is clearly obvious. People's apprehension over the IoT's dependability has therefore skyrocketed. IoT networks' key requirements are dependability, channel security, fault tolerance, and reliability. Monitoring the IoT networks depends on the availability and correct functioning of all the network nodes. Recent research has proposed promising solutions to address these challenges. This article systematically examines recent articles that use meta-heuristic and nature-inspired algorithms to establish reliable IoT networks. Eighteen articles were analyzed in four groups. Results showed that reliable enhancement mechanisms in IoT networks increase fault node detection, network efficiency, and lifetime and attain energy optimization results in the IoT concept. Additionally, it was discovered in the literature that the current studies focus on how to effectively use edge network capabilities for IoT application executions and support, along with the related needs.     

Me,myself and my mobile: A segmentation of youths based on their attitudes towards the mobile phone as a status instrument

The importance of the mobile phone in the life of adolescents has led observers to speak of a Mobile Youth Culture. One of the central characteristics of this youth culture is the use of the mobile phone as a means to display or enhance one’s status in the peer group. To date, however, little attention has gone out to the different uses adolescents may have for their mobile phones. Therefore, this study aims to further our understanding of the heterogeneity in adolescent mobile phone use by examining whether we can distinguish between different ‘mobile lifestyles’ within the Mobile Youth Culture. Drawing on a quantitative survey among 1943 Flemish adolescents (12–18 years), we differentiated three lifestyles based on their attitudes towards the mobile phone as a fashion article, as a display of one’s popularity and as a display of one’s time scarcity. A two-step cluster procedure based on respondents’ scores on these three mechanisms revealed three different segments: trendy users (N = 603), engaged users (N = 864) and thrifty users (N = 436). These segments showed significantly different profiles in terms of socio-demographics, their use of the mobile phone in the presentation of the Self and the mobile phone’s role in their friendship relationships.     

Study on the thermal stability of Ga-doped ZnO thin film: A transparent conductive layer for dye-sensitized TiO2 nanoparticles based solar cells

Generally, optoelectronic devices are fabricated at a high temperature. So the stability of properties for transparent conductive oxide (TCO) films at such a high temperature must be excellent. In the paper, we investigated the thermal stability of Ga-doped ZnO (GZO) transparent conductive films which were heated in air at a high temperature up to 500 °C for 30 min. After heating in air at 500 °C for 30 min, the lowest sheet resistance value for the GZO film grown at 300 °C increased from 5.5 Ω/sq to 8.3 Ω/sq, which is lower than 10 Ω/sq. The average transmittance in the visible light of all the GZO films is over 90%, and the highest transmittance is as high as 96%, which is not influenced by heating. However, the transmittance in the near-infrared (NIR) region for the GZO film grown at 350 °C increases significantly after heating. And the grain size of the GZO film grown at 350 °C after annealing at 500 °C for 30 min is the biggest. Then dye-sensitized TiO2 NPs based solar cells were fabricated on the GZO film grown at 350 °C (which exhibits the highest transmittance in NIR region after heating at 500 °C for 30 min) and 300 °C (which exhibits the lowest sheet resistance after heating at 500 °C for 30 min). The dye-sensitized solar cell (DSSC) fabricated on the GZO film grown at 350 °C exhibits superior conversion efficiency. Therefore, transparent conductive glass applying in DSSCs must have a low sheet resistance, a high transmittance in the ultraviolet–visible–infrared region and an excellent surface microstructure.     

从实际出发走自己的路——十一所激光早期发展中的点滴体会

在简述十一所固体激光技术发展史之后,阐述个人在十一所早期激光研究工作中的一些体会:从当时实际情况出发,确定十一所激光研究方向;抓住运动目标探测的主要矛盾,努力攻克高重复频率器件技术关;选准突破口,全力以赴拿下靶场激光测距技术;扩大战果,积极推广应用;夯实技术基础,保持发展后劲。在40多年工作中,形成了十一所自己的特色,为国防和国民经济建设做出了重要贡献。