基于物联网技术的图书馆服务模式与内容的研究

随着物联网的飞速发展,它在各行业的应用范围也越来越广.基于物联网的管理和服务是图书馆的发展趋势之一,它不仅能够对图书进行高效、便捷的管理,更重要的是这将为服务内容和服务模式提供全新的发展机遇,文章介绍了物联网和智能图书馆的定义,对这种新技术应用下的图书馆服务模式和内容进行了深入的分析和阐述.     

Smart contract applications within blockchain technology: A systematic mapping study

With the advent of blockchain, smart contracts have become one of the most sought-after technologies because of the high customisability they add to transactions. This has given rise to many smart contract applications in areas ranging from financial services, life sciences and healthcare to energy resources and voting. However, due to their infancy, smart contracts still pose many challenges that encumber the stakeholders who interact with them: users, developers and the organisations that are built on top of smart contracts. This study aims to contribute to the body of knowledge of smart contracts within blockchain technology. Based on a systematic mapping study, we offer a broad perspective on their problems and corresponding solutions, present the research trends within the area and compile the 64 papers identified, grouped by top publication sources, channels, methods and approaches. We conclude that, since 2016, there has been an increasing trend towards the publication of blockchain-based smart contract articles at conferences and journals, mainly reflecting experiments and presenting methods, tools and models. According to the results, the most commonly discussed problems and solutions in the literature are related to the security, privacy and scalability of blockchain and the programmability of smart contracts.     

System for recognizing lecture quality based on analysis of physical parameters

In this paper we have presented a smart classroom system that is able to classify students’ satisfaction with the lecture quality by examining parameters of the physical environment obtained using different smart devices. The system is based on the Random forest classifier, which showed the best accuracy among all machine learning algorithms available in Weka tool, with dataset collected during 28 lectures and evaluated using 10-fold cross validation. The system is implemented using different set of tools (such as Matlab and Weka) and can extract features from the ambient sound and analyze values obtained from different smart devices deployed in the classroom. Based on the extracted and captured data the system provides in real time information about the students’ satisfaction with the lecture quality. For the validation purposes, we recorded 13 more lectures attended by four different student groups where the number of students varied from 5 to 18. The system accuracy was evaluated by comparing system outputs with the students’ feedback and ranged from 70.7% to 83.9%.     

多波束球形反射面天线

论证了电磁透镜消球差的基本原理,并提出了解决介质透镜技术和改善透镜修正系统总效率的办法,从而实现了多波束球形反射面天线对大空域指向跟踪.这一技术有广泛的应用前景,在有限空间指向的智能天线上也得以应用.     

EcheLon公司的电力线载波通信技术

介绍Echelon公司的电力线载波传输技术的发展情况,该技术采用窄带BPSK调制,符合全球各地对电力线载波频率的限制要求,有超过两千万台使用该技术的设备安装在世界各地,是一种久经考验的技术,具有无与伦比的通信可靠性。最新的收发器采用智能的单芯片结构,能更好地满足用户的需求。     

汽车悬架控制系统研究动态与展望

综述汽车悬架控制系统的基本类型，半主动控制和主动控制的控制策略。由于智能阻尼装置具有机械结构简单，动态范围大，能耗低等特点，是一种非常有前途的半主动减振装置。介绍电流变液体及磁流变液体和装置的主要特点与优点，并给出智能阻尼器的模型。着重论述几种控制方法在汽车悬架控制系统中的应用，探讨今后的研究方向和发展趋势。     

基于智能积分因子的三维模糊控制器及其应用

模糊控制器以其结构简单，适应性强，响应速度快，鲁棒性好等特点引起广泛注意。本文分析了模糊控制器的稳态控制特性，提出了在模糊控制输入端引入一种智能积分器，形成一类三维模糊控制器。并对其进行了结构分析，通过仿真及在电液位置同步控制系统中的应用，表明这种模糊控制器具有良好的稳态控制性能。     

数据库授权系统的研究与实现

本文首先分析了在关系数据库环境下管理信息系统ＭＩＳ的授权需求，借助于面向的数据模型（ＯＯＤＭ）概念，对目前得到广泛使用的菜单调用功能方式进行了初步的研究和分析，提出了授权菜单树（ＡＭＴ）和有关数据库授权中菜单对象授权和视图对象授权相结合的基本概念。     

一种OADSS的设计与实现

从办公决策的特点出发，探讨了用于办公自动化的决策支持系统（ＯＡＤＳＳ）中问题模型构成要素及其功能模型；说明了从基于Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ结构与Ｏ－Ｏ技术的分布式ＯＡＤＤＳ中抽取共性的分类模型的可能性和途径。对ＯＡＤＳＳ系统模型进行了总体设计，给出了该系统的逻辑模型和物理结构构想。     

FTP协议分析及其客户程序的实现

本文分析了ＦＴＰ（ＦｉｌｅＴｒａｎｓｆｅｒＰｒｏｔｏｃｏｌ）文件传输协议的内部实现，同时提出了ＦＴＰ客户程序在工作站上的套接字实现方法