GA and PSO culled hybrid technique for economic dispatch problem with prohibited operating zones     

SUDHAKARAN M. AJAY-D-VIMALRAJ P. PALANIVELU T.G. 《浙江大学学报(A卷英文版)》2007,8(6):896-903

This paper presents an efficient and reliable genetic algorithm (GA) based particle swarm optimization (PSO) tech- nique (hybrid GAPSO) for solving the economic dispatch (ED) problem in power systems. The non-linear characteristics of the generators, such as prohibited operating zones, ramp rate limits and non-smooth cost functions of the practical generator operation are considered. The proposed hybrid algorithm is demonstrated for three different systems and the performance is compared with the GA and PSO in terms of solution quality and computation efficiency. Comparison of results proved that the proposed algo- rithm can obtain higher quality solutions efficiently in ED problems. A comprehensive software package is developed using MATLAB.  相似文献   

重构学习空间——基于云班课平台的混合式教学实践     

蒙银菊 《教育教学论坛》2020,(6):254-255

互联网和新兴信息技术的发展,对传统的大学教育教学提出了挑战。借助云班课平台的支持可以重构师生的学习资源空间、学习关系和学习空间,实现新技术与教育教学的深度整合,实践开展混合式教学,推动大学课堂改革。  相似文献   

A guide to establishing hybrid learning courses: Employing information technology to create a new learning experience, and a case study   总被引：2，自引：1，他引：2  

Kamolbhan Olapiriyakul  Julian M. Scher   《The Internet and Higher Education》2006,9(4):287-301

Hybrid learning, or blended learning, has become an interesting learning delivery method in recent years. Many universities have sought to develop their own hybrid learning courses as another option for students and instructors who prefer to replace some portion of traditional face-to-face meeting time with online instruction. This paper provides some pragmatic guidance for establishing hybrid learning courses in universities. The authors focus on the use of information technology, as well as the development and the design of the course content. The paper also illustrates a case study of hybrid learning courses at NJIT. The research results showed no significant difference between the performance of the students who took a course in hybrid mode versus the performance of those who took the identical course in distance learning mode. Some positive feedback in terms of perceived benefit from the hybrid course instruction and course materials was obtained from the students. The student learning styles were also investigated. The results demonstrated that the majority of students who participated in the hybrid learning course are active/sensing/sequential/visual learners. Most of them preferred visual presentations to verbal explanations. The research results also revealed the difference between learning styles of students with high performance, and those with low performance.  相似文献   

A Best Practice Modular Design of a Hybrid Course Delivery Structure for an Executive Education Program          下载免费PDF全文

Dorothy E. Klotz  Thomas A. Wright 《Decision Sciences Journal of Innovative Education》2017,15(1):25-41

This article highlights a best practice approach that showcases the highly successful deployment of a hybrid course delivery structure for an Operations core course in an Executive MBA Program. A key design element of the approach was the modular design of both the course itself and the learning materials. While other hybrid deployments may stress the importance of modular design, our deployment demonstrates how content can be easily mixed and matched into shorter courses on select topics. In particular, through the migration of select content online and the use of face‐to‐face class time for discussion and active‐learning experiences, we were able to dramatically reduce face‐to‐face student seat time, positively increase the student experience, and facilitate dramatic improvement in student academic achievement.  相似文献   

Energy management strategy for a parallel hybrid electric vehicle equipped with a battery/ultra-capacitor hybrid energy storage system     

Jun-yi LIANG  Jian-long ZHANG  Xi ZHANG  Shi-fei YUAN  Cheng-liang YIN 《浙江大学学报(A卷英文版)》2013,14(8):535-553

To solve the low power density issue of hybrid electric vehicular batteries, a combination of batteries and ultra- capacitors （UCs） could be a solution. The high power density feature of UCs can improve the performance of battery/UC hybrid energy storage systems （HESSs）. This paper presents a parallel hybrid electric vehicle （HEV） equipped with an internal combus- tion engine and an HESS. An advanced energy management strategy （EMS）, mainly based on fuzzy logic, is proposed to improve the fuel economy of the HEV and the endurance of the HESS. The EMS is capable of determining the ideal distribution of output power among the internal combustion engine, battery, and UC according to the propelling power or regenerative braking power of the vehicle. To validate the effectiveness of the EMS, numerical simulation and experimental validations are carried out. The results indicate that EMS can effectively control the power sources to work within their respective efficient areas. The battery load can be mitigated and prolonged battery life can be expected. The electrical energy consumption in the HESS is reduced by 3.91% compared with that in the battery only system. Fuel consumption of the HEV is reduced by 24.3% compared with that of the same class conventional vehicles under Economic Commission of Europe driving cycle.  相似文献   

复合图书馆的文献信息服务   总被引：5，自引：0，他引：5  

黄红华 《高校图书馆工作》2006,26(3):60-61,73

从传统的文献信息服务到复合图书馆的文献信息服务,是当前图书馆文献信息服务的发展趋势.本文分析了当前复合图书馆文献信息服务的现状,提出了进一步提高文献信息服务水平的措施.参考文献5.  相似文献   

Cultural analyses in a Taiwanese kindergarten: A postcolonial reflection and study   总被引：1，自引：0，他引：1  

Teng Huang 《International Journal of Educational Development》2013

The concept of homogenization is highlighted in the current discourse of postcolonialism in the educational arena. However, this concept strengthens the dimension of cultural convergence, but not the dimension of cultural divergence. Furthermore, an overly dualistic view is also aligned with the concept of homogenization and then leads to the neglect of the phenomenon of cultural hybridity and the studies of cultural differences. Through a qualitative study in a Taiwanese kindergarten, this study investigates whether any cultural hybridity appears in classroom practices, and what happens in the process. The results indicate that the concept of cultural hybridity is more suitable to explain the complex phenomena in schools, and both the ontologically and epistemologically cultural aspects are interwoven in the process of hybridity. According to the results, I propose a three-stage framework to interpret the development of hybridity: the extent of the matched context, the extent of cultural conflict, and the awareness of cultural difference.  相似文献   

融入内容信息的作者共被引分析——以学科服务研究主题为例   总被引：2，自引：0，他引：2  

李秀霞  邵作运 《图书情报工作》2016,60(1):98

[目的/意义]为改善作者共被引分析(author co-citation analysis,ACA)在识别学科领域知识结构中缺乏内容信息的不足,将文献内容信息(题名、摘要、关键词)引入到作者共被引分析中,提出一种新的作者共被引分析方法,即"内容与ACA融合的方法(content and author co-citation analysis,C-ACA)"。[方法/过程]以"学科服务"主题领域为例,分别建立ACA作者相似矩阵A_ij、作者-内容矩阵并转换为作者相似矩阵B_ij;通过构建线性融合函数实现作者文献内容与ACA的融合;最后通过提取作者主题因子成分并在NetDraw环境下进行2-模图可视化,挖掘并呈现学科服务研究领域的知识结构。[结果/结论]与传统ACA方法比较,C-ACA方法能够更准确、更细致地挖掘和揭示学科领域知识结构。  相似文献   

基于视频压缩编码的动态图像水印方案     

万书振 《人天科学研究》2009,(2)

提出了一种新的基于视频压缩编码的动态图像水印方案。在嵌入水印时,充分考虑动态图像压缩编码的特性,对帧内编码帧(I帧),将水印信息嵌入到DCT低频系数中;而对帧间编码帧(P,B帧),结合动态补偿/离散余弦变换(MC/DCT)混介编码,把水印信息嵌入到运动补偿后的残差图像的自流成分中。同时,在水印嵌入时,采用扩频技术与多维水印相结合的方法,并通过相关检测的方法判断水印的存在。由于水印的检测是对视频码流直接实施的,不需要对压缩数据进行完全解码,从而大大降低了计算量,提高了视频数据水印的适用性。  相似文献   

基于知识图谱的国际科学计量学研究前沿计量分析   总被引：10，自引：0，他引：10       下载免费PDF全文

侯海燕  刘则渊  栾春娟 《科研管理》2009,30(1):164-170

摘要：通过绘制科学计量学研究前沿知识图谱,界定出七大国际科学计量学研究前沿领域：1、引文理论、科学交流、基础科研评价;2、科学知识图谱理论与方法、网络计量学;3、科学技术合作;4、科学计量学经典概率分布、文献计量学定律、信息计量学;5、科学计量学指标与国家科研绩效评价;6、知识的新产品--科技动力学;7、科学与技术的关系。其中前沿领域1、2、4属于理论与方法研究领域,而前沿领域3、5、6、7属于应用研究领域。经过比较发现科学计量学更加侧重于理论与方法研究。  相似文献