Iron mediated cathodic electrosynthesis of hausmannite nanoparticles

A novel synthetic route has been proposed to prepare hausmannite nanoparticles. The synthetic route comprises an iron mediated constant current cathodic electrodeposition of manganite and heat treatment of the latter to obtain hausmannite. The obtained nanostructures have been characterized using X-ray Diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX) and Fourier transform Infrared Spectrometry (FTIR). The role of iron in the formation of manganite precursor has been studied by cyclic voltammetry (CV) and differential thermal analysis (DTA). A formation mechanism based on iron mediated formation of Mn³⁺ and subsequent cathodic reduction of the disproportionated products has been proposed accordingly. The prepared nanoparticles exhibited specific capacitance of 143 F g⁻¹ in 0.5 M Na₂SO₄ solution. The retained specific capacity was 87% after 2000 cycles.     

病理学精品课程网站“在线测试”的建设和应用探讨

介绍了病理学精品课程网站的建设以及在线考试系统的实现技术,从提高网站建设和在线测试质量的角度研究探讨了在线测试系统。该系统对病理学课程教学质量和水平的提高能起到积极的促进作用,并可在其他课程的标准化考试中推广应用。     

Paradigm and performance analysis of distributed frequent itemset mining algorithms based on Mapreduce

FrequentItemsetMining (FIM) is one of the most important data mining tasks and is the foundation of many data mining tasks. In Big Data era, centralized FIM algorithms cannot meet the needs of FIM for big data in terms of time and space, so Distributed Frequent Itemset Mining (DFIM) algorithms have been designed to meet the above challenges. In this paper, LocalGlobal and RedistributionMining which are two main paradigms of DFIM algorithm are discussed; Two algorithms of these paradigms on MapReduce named LG and RM are proposed while MapReduce is a popular distributed computing model, and also the related work is discussed. The experimental results show that the RM algorithm has better performance in terms of computation and scalability of sites, and can be used as the basis for designing the DFIM algorithm based on MapReduce. This paper also discusses the main ideas of improving the DFIM algorithms based on MapReduce.     

再论高职人才培养目标之定位

高职教育培养的是一线的技术应用性人才,即技能熟练的技术人才、运用技术的高技能人才。从服务区域经济发展、特色产业发展、工业化和现代化发展进程等方面看高职人才培养目标定位,可以而且应该是一柱多棱的。高职人才培养目标定位的实现路径,在于实践动手能力的系统和可持续发展能力的基础知识系统的构建。     

论高职院校特色化发展的几个问题

通过对高职院校特色发展过程中可能遇到的特色文化构建、学校功能多元化、人才培养模式创新、特色专业的设置、教育国际化的推进等相关问题进行剖析,探讨高职院校准确定位、发挥学校与社会两方面积极性、政府相关教育公共服务产品的支持等途径与机制,为实现特色办学、强校建设,服务社会经济发展提供一点理论依据。     

应用消息队列应对大并发访问的解决方案

为了让使用此消息队列的开发人员了解此消息队列的接口以及结构,特编写此文档。     

浅析高校网络安全存在的问题及对策

作为高校信息化建设的基础设施,校园网不仅推动了教育思想和教学手段的改革,而且实现了校园内资源的数字化和共享,加强了校园内外的资源交流。但是,校园网在提高管理效率、促进教学科研发展、方便校园生活的同时,面临着许多的网络安全问题,本文在分析了高校网络安全问题特殊现状的基础上,提出了多项相关对策,确保校园网络的安全有序运行。     

基于改进LDA和CNN的网络入侵聚类

提出了一种基于改进线性判别分析和近邻法的网络入侵聚类方法,运用改进的线性判别分析方法对网络入侵样本特征进行降维处理,使用近邻分类器对数据进行聚类。该算法降低了算法的聚类时间,还提高了算法的聚类能力。实验结果表明,相比其他模型,该算法有较高的检测率和较低的误警率。     

放电等离子体处理室内甲醛的研究

居室装修引起的室内甲醛污染带来诸多健康安全隐患．已经受到越来越广泛的关注。针对该问题．模拟室内甲醛污染的情况，利用放电等离子体对其进行处理。设计了甲醛污染空气模拟室及介质阻挡放电处理装置，研究了甲醛浓度、外加电压、处理时间等条件与甲醛降解率的关系。实验结果表明，采用放电等离子体技术处理模拟室内甲醛气体具有较好效果，可以快速有效地降解甲醛。     

基于PLC技术的矿井提升机综合保护控制系统设计

依托于PLC技术,提出矿井提升机综合保护控制系统总体设计方案,并对软件设计方案进行详细阐述。该设计方案具有直观而友善的操作界面,可扩展能力强,是确保矿井提升机安全有效运行的保障。