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5篇 您的检索式:作者名="Muhammad Yousif"
    题名 作者 年代 出处 被引量
1交直流混合电网的多智能体自律分散控制显示文摘针对交直流混合电网传统集中控制缺乏灵活性和鲁棒性的特点,以及分布式控制无法同时兼顾全局最优及响应速度等的不足,提出一种基于多智能体系统的交直流混合电网自律分散控制策略,即在多端直流的每个端子都设置一个智能体,构成多智能体系统,每个智能体都包含两个功能模块:全局信息获取模块和自主决策模块。采用这种控制策略时,上层优化问题与传统的电网调度问题相近,下层系统通过智能体之间以及智能体与系统间的交互、协调,实现群体妥协解。在仅有邻居换流站电压、频率等状态信息基础上,基于多智能体一致性控制实现各端换流站间有功功率的合理分配,平抑负荷波动。最后通过PSCAD仿真搭建典型的交直流混合电网验证所提控制策略的有效性及优越性。高扬 艾芊 郝然 张昭丞 Muhammad Yousif 2017电网技术2017,41,4:15
2Crypto-Giardia antigen rapid test versus conventional modified Ziehl-Neelsen acid fast staining method for diagnosis of cryptosporidiosis显示文摘Objectove:To evaluate the validity of Crypto-Giardia antigen rapid test(CA-RT) in comparison with the conventional mollified Ziehl-Neelsen acid fast(MZN-AF) staining method for the diagnosis of cryptosporidiosis.Methods:Fifteen preserved stool samples from previously confirmed infections were used as positive controls and 40 stool samples from healthy people were used as negative control.A total of 85 stool samples were collected from suspected patients with cryptosporidiosis over 6 months during the period from January till June.2011.The stud) was conducted in the department of parasitology,central laboratory.Alnoor Specialist Hospital, Makkah.Saudi Arabia.All samples were subjected to CA-RT and conventional MZN-AF staining method.Validation parameters including sensitivity(SN).specificity(SP),accuracy index (AI).positive predictive value(PPV).and negative predictive value(NPV) were evaluated for both tests.Results:Out of 15[lositive controls,CA-RT detected 13(86.7%) while MZN-AF detected 11(73.3%) positive cases.However.CA-RT detected no positive case in 40 normal controls but MZN-AF detected 2(5%) as positive cases.Based on the results,the SN.SP.AI.PPV and NPV were high in CA-RT than MZN-AF staining method,ie..86.7%vs.73.3%.100%vs.95%.96.4%vs.89.1%. 100%vs.84.6%and 95.2%vs.90.5%.respectively.Out of a total of 85 suspected specimens.CART detected 7(8.2%) but MZN-AF detected 6(7.1%) cases as positive.Conclusions:CA-RT immunoassay is more valid and reliable than MZN-AF staining method.Dina Abdulla Muhammad Zaglool Amr Mohamed Yousif Abdul Wahid Khodari Mian Usman Farooq 2013Asian Pacific Journal of Tropical Medicine2013,6,3:3
3An Optimal Dispatch Strategy for Distributed Microgrids Using PSO显示文摘Grid structures are rapidly evolving in view of contemporary energy policies which ensure the addition of more renewable sources to reduce the carbon footprint.Compared to a centralized approach,low voltage grids(decentralized and distributed)are promising approaches to integrating nondispatchable renewable energy sources(RESs).Installing local micro level power generation sources such as fuel cells,microturbines,and energy storage systems are a recent trend which helps in the intermittent effects of RESs and makes microgrids less dependable on the main grid.Due to the increasing variety of distributed generation sources having diverse characteristics,power dispatch scheduling of distributed microgrids is becoming challenging.A dispatch scheduling solution from an operator’s point of view is presented by the authors.The core objective of this study is to minimize the carbon emissions and the cost of each microgrid.Further,it is observed that sales and purchases from the main grid are reduced.Consequently,transmission losses are also decreased.Muhammad Yousif Qian Ai Yang Gao Waqas Ahmad Wattoo Ziqing Jiang Ran Hao 2020CSEE Journal of Power and Energy Systems2020,6,3:3
4巴基斯坦市、县与乡级地区的发展均衡性研究显示文摘巴基斯坦城区面临着平衡各地区社会经济与实体发展水平的巨大挑战。与一级城市相比,巴基斯坦的中小城市地区发展还非常落后。本研究旨在刻画巴基斯坦当前城镇的发展状况,以公共服务、基础设施及环境质量为三个基础指标,辅以人口、人均收入、医疗服务指标判断城市发展均衡性。根据巴基斯坦全国层面统计、规划与发展部门提供的量化数据,辅以巴基斯坦四省提供的数据,利用微软的统计软件进行数据分析。ArcGIS利用数据生成的空间图显示了巴基斯坦各城市间的城市发展均衡性。结果表明:巴基斯坦城镇化步伐迅速,多半大城市与一级城市地区都受到城镇化的影响。其次,二级城市的发展开始下滑。由于缺少适用的基础服务设施,人们纷纷迁移到一级城市周围的中小城镇。巴基斯坦政府应立即采取措施提升各城市地区的公共服务、基础设施与环境指标,使市(Metropolitan)、县(District)及乡(Tehsil)级城市地区间的社会经济与实体发展保持均衡。Muhammad Yousif 张悦 2018小城镇建设2018,36,11:1
5Genetic Diversity among Some Sheep Breeds in Sulaimani Governorate Using RAPD-PCR Technique显示文摘Yousif Muhammad Salih Al-Barzinj Muqdad Kamal Ali 2013Journal of Life Sciences2013,7,9:0
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