热电冷联产系统建模与优化研究

针对热电冷联产系统的工作原理进行研究,并对该系统的常用优化方法、策略进行了对比介绍,提出了实现热电冷联产系统技术最优运行模型。对热电冷联产系统中的脱机过程和联机过程的分别进行了优化研究,给出了优化的基本思路。最后对热电冷联产系统的优化过程进行了详细描述,通过对系统模型的主要参数、工作过程进行建模,并通过相互之间的约束关系分析,得到了模型的优化结果。     

基于数据挖掘的图书馆的读者借阅行为分析

图书馆数字化发展,使数据挖掘技术在读者借阅行为分析方面得到了广泛使用。利用图书馆的借阅数据及调查结果,可形成一个关于读者需求的数据仓库,挖掘出读者需求的规则和模式,提取出有价值的内在信息,以便为图书馆建设服务。     

数学教学中的开放式教学——创造一种课堂数学文化

数学教学中需要对开放式教学进行合作研究。在日本的开放式教学中，数学问题被选择是用来说明一个问题的多种解法或多个正确答案。数学教学要实现一种全新的课堂数学文化，这种数学形式的特点是：问题开放、解决问题的过程开放、构建问题开放、评价开放，使学生能自由地思考，发展学生的思维能力。     

论现代远程开放教育的教师素质要求

现代远程开放教育方式及其发展趋势，对师资队伍素质提出了特殊要求。教师必须转变教育观念，确立“学生中心”理念；必须转变教育模式，把握远程教育的开放性、学习的自主性等特征；必须培养较强的教育能力，包括技术应用能力和管理服务能力。     

University physics students’ ideas of thermal radiation expressed in open laboratory activities using infrared cameras

Background: University physics students were engaged in open-ended thermodynamics laboratory activities with a focus on understanding a chosen phenomenon or the principle of laboratory apparatus, such as thermal radiation and a heat pump. Students had access to handheld infrared (IR) cameras for their investigations.

Purpose: The purpose of the research was to explore students’ interactions with reformed thermodynamics laboratory activities. It was guided by the research question: How do university physics students make use of IR cameras in open-ended investigation of thermal radiation as a phenomenon?

Sample: The study was conducted with a class of first-year university physics students in Sweden. The interaction with the activities of four of the students was selected for analysis. The four students are males.

Design and methods: We used a qualitative, interpretive approach to the study of students’ interaction. The primary means of data collection was video recording of students’ work with the laboratory activities and their subsequent presentations. The analysis focused on how IR cameras helped students notice phenomena relating to thermal radiation, with comparison to previous research on students’ conceptions of thermal radiation.

Results: When using the IR camera, students attended to the reflection of thermal radiation on shiny surfaces, such as polished metals, windows or a whiteboard and emissive properties of surfaces of different types. In this way, they went beyond using the technology as a temperature probe. Students were able to discuss merits and shortcomings of IR cameras in comparison with digital thermometers.

Conclusions: With the help of IR cameras, university physics students attend to thermal phenomena that would otherwise easily go unnoticed.     

基于视频的数据挖掘系统的研究

研究了一种视频数据挖掘的系统结构.介绍了该系统中各主要模块的功能;描述了视频数据预处理和视频数据立方体;讨论了视频数据挖掘方法并探讨了典型的视频挖掘技术.     

奥美拉唑联合阿莫西林和呋喃唑酮治疗幽门螺杆菌感染临床分析

目的 :观察奥美拉唑联合阿莫西林和呋喃唑酮治疗幽门螺杆菌感染的效果 .方法 :将2 4 0病例随机分为两组 .治疗组采用奥美拉唑联合阿莫西林和呋喃唑酮 (简称奥组 ) ,对照组采用果胶铋联合阿莫西林和甲硝唑 ,疗程两周 .结果 :治疗组和对照组HP根除率分别为96 7%和 6 8 3% ,溃疡及糜烂面愈合率分别为 90 0 %和 6 1 7% ,两组差异有显著性意义 (P <0 0 1) .结论 :奥美拉唑联合阿莫西林和呋喃唑酮是目前一种理想的根除HP治愈溃疡及糜烂面的方案 .     

Multi-actor co-design of extension interventions: paradoxes arising in three cases in the Republic of Ireland

Purpose: This paper demystifies the processes, methodologies and outputs of three co-design projects, identifying how and to what extent are aims and principles of the multi-actor approach realised and upheld in the field. Implications from the cases for participatory principles are discussed.

Design/Methodology/approach: A detailed ethnographic account is presented of three multi-actor co-design cases, supporting diverse readers’ interpretations and learnings.

Findings: Three paradoxes were identifiable from the multi-actor processes: (1) outputs can be orphaned when they lack strong identifiers and affiliations with discrete professional communities outside of the co-design team; (2) combining diverse knowledges co-design can generate outputs that are new and strange (rather than familiar and acceptable) to end-users; (3) for Responsible Research and Innovation, co-creating interventions that are challenging (rather than popular) to society may be required.

Practical implications: Awareness of dynamics and paradoxes arising in the implementation of multi-actor co-design supports enhanced facilitation of processes and impacts of outcomes. Together, the paradoxes highlight the critical importance of communications and engagement initiatives across diverse communities in the aftermath of co-design efforts.

Theoretical implications: Although co-design processes are case-dependent, reflexive accounts of how they play out contribute to the body of knowledge of how co-design may be better understood. The cases in this paper identify paradoxes with implications for principles and theory of multi-actor co-design.

Originality/Value: This paper presents a detailed account of three unique co-design processes. Practical and theoretical implications of the cases are identified.     

基于支持向量机的数据挖掘技术

随着数据库技术的迅速发展以及数据库管理系统的广泛应用,人们积累的数据越来越多.激增的数据背后隐藏着许多重要的信息,人们希望能够对其进行更高层次的分析,以便更好地利用这些数据.将目前先进的机器学习技术支持向量机,与数据挖掘结合起来,提出了一个改进的支持向量机训练算法,进行了支持向量机自动分类的模拟试验.试验结果显示,新算法的训练速度明显提高,并获得了比较理想的分类结果.     

企业新计量信息流转模型和新自动计量模型设计与实施的应用研究

文章讨论了基于信息化数据通讯流转原理和现场自动控制理论,研究了冶金制造企业大宗原燃料、成品、半成品和产品新计量信息流转模型和新自动计量模型设计与实施的现代信息流转和自动称量达到自动、稳定、正确、可靠、合理、可追溯的问题,通过在本钢集团公司ERP、EMS系统配套运行和现场轧钢线计量称重实施等线上操作的手段来实现应用研究。解决了企业新计量信息流转模型和新自动计量模型设计与实施的问题,达到了计量信息系统的提出"数出一门,量出一家"和"网络化自动运行"要求,为冶金制造行业解决此类问题提供了新的思路和方法,具有极大的推广和应用价值。