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Protection and Control of Modern Power Systems 2022年第1期7卷 149-164页

作者： md.yah-ya ul haque md.Rashidul Islam Tanvir Ahmed md.Rafiqul Islam Sheikh Department of Electrical and Electronic Engineering Varendra UniversityRajshahi 6204Bangladesh Department of Electrical and Electronic Engineering Rajshahi University of Engineering&TechnologyRajshahi 6204Bangladesh

Growing application of distributed generation units at remote places has led to the evolution of microgrid(MG)*** an MG system functions independently,i.e.,in autonomous mode,unpredictable loads and uncertainties emerge throughout the *** obtain stable and flexible operation of an autonomous MG,a rigid control mechanism is *** this paper,a robust high-performance controller is introduced to improve the performance of voltage tracking of an MG system and to eliminate stability problems.A combination of a resonant controller and a lead-lag compensator in a positive position feedback path is designed,one which obeys the negative imaginary(NI)theorem,for both single-phase and three-phase autonomous MG *** controller has excellent tracking *** is investigated through considering various uncertainties with different load *** feasibility and effectiveness of the controller are also determined with a comparative analysis with some well-known controllers,such as linear quadratic regulator,model predictive and NI approached resonant *** confirms the superi-ority of the designed controller.

关键词： Negative imaginary theorem Resonant controller Lead-lag compensator Autonomous microgrid Voltage tracking

Point-of-care ultrasonography spotlight:Could venous excess ultrasound serve as a shared language for internists and intensivists?

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World Journal of Critical Care Medicine 2024年第2期13卷 126-136页

作者： Anosh Aslam Khan Hasham Saeed Ibtehaj ul haque Ayman Iqbal Doantrang Du Abhilash Koratala Department of Internal Medicine Monmouth Medical CenterLong BranchNJ 07740United States Department of Internal Medicine Trinitas Regional Medical CenterElizabethNJ 07202United States Department of Anesthesiology Dr.Ruth K M Pfau Civil HospitalKarachi 74400Pakistan Department of Internal Medicine Dow Medical CollegeKarachi 74200Pakistan Division of Nephrology Medical College of WisconsinMilwaukeeWI 53226United States

Point-of-care ultrasonography(POCUS),particularly venous excess ultrasound(VExUS)is emerging as a valuable bedside tool to gain real-time hemodynamic *** modality,derived from hepatic vein,portal vein,and intrarenal vessel Doppler patterns,offers a scoring system for dynamic venous congestion *** an assessment can be crucial in effective management of patients with heart failure *** facilitates diagnosis,quantification of congestion,prognostication,and monitoring the efficacy of decongestive *** such,it can effectively help to manage cardiorenal syndromes in various clinical *** or eVExUS explores additional veins,potentially broadening its *** VExUS demonstrates promising outcomes,challenges persist,particularly in cases involving renal and liver parenchymal disease,arrhythmias,and situations of pressure and volume overload *** in utilizing spectral Doppler is pivotal for clinicians to effectively employ this ***,the integration of POCUS,especially advanced applications like VExUS,into routine clinical practice necessitates enhanced training across medical specialties.

关键词： Point-of-care ultrasonography ultrasound Venous excess ultrasound Doppler Congestion Heart failure

Beyond Stitches: Analysis of Disease Burden in a Bangladeshi RMG Factory

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Health 2024年第7期16卷 688-702页

作者： Mariam Zaman Tayeb Ahmmed Nabila Binte Hossain S. M. Raysul haque Ariful Islam Joarder Kamran ul Baset Department of Procurement SM Group Dhaka Bangladesh Department of Neurosurgery Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh Department of Public Health Independent University Bangladesh (IUB) Dhaka Bangladesh Department of Cardiology Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh

Introduction: Bangladesh has experienced remarkable growth in RMG over the past 25 years. With the knitwear industry providing more than 4 million direct jobs, providing better occupational health and safety of workers remains a challenge. Aim of the study: The aim of the study was to analyze the disease burden of a RMG factory, and to highlight occupational health risks. Methods: A cross-sectional study design was employed for this analysis. A 17-month data entry (January 2020 - May 2021) was gathered from the factory in-house clinic. The socio-demographic and clinical diagnosis entries of 8421 entries were analyzed. Result: The population of the factory workers is 5370, where 40% (2148) are female workers and 60% (3222) are male workers. The mean age of respondents is 30 years, with a SD of ±7 years. Among the chief complaints, the most common was vomiting (14%;2262) fever (14%;2247), runny nose (11%;1842), cough (9%;1465), and loose motion (8%;1364). In the diagnosis categories, gastrointestinal diseases were more predominantly diagnosed (35%;2978), followed by viral fever (21%;1772), neurological diseases (16.5%;1389) and musculoskeletal disorders (9%;768). The average cost of medicine for each respondent is BDT 36. The factory covered costs of all medication for 99% (8380) of respondents. Only 0.5% (37) was referred to a tertiary hospital for further evaluation. Conclusion: Garments workers suffer mostly from long-term occupational health hazards. Factory owners and policy makers can contribute in various ways to improving primary healthcare options for workers.

关键词： RMG Disease Burden Work Related Disease Communicable Disease Occupational Safety

Modelling and Verification of Context-Aware Intelligent Assistive Formalism

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Computers, Materials & Continua 2022年第5期71卷 3355-3373页

作者： Shahid Yousaf Hafiz Mahfooz ul haque Abbas Khalid Muhammad Adnan Hashmi Eraj Khan Department of Computer Science&IT The University of LahoreLahore54000Pakistan Department of Software Engineering The University of LahoreLahore54000Pakistan Higher Colleges of Technology Abu Dhabi25026UAE

Recent years have witnessed the expeditious evolution of intelligentsmart devices and autonomous software technologies with the expandeddomains of computing from workplaces to smart computing in everydayroutine life activities. This trend has been rapidly advancing towards the newgeneration of systems where smart devices play vital roles in acting intelligently on behalf of the users. Context-awareness has emerged from the pervasive computing paradigm. Context-aware systems have the ability to acquirecontextual information from the surrounding environment autonomously,perform reasoning on it, and then adapt their behaviors accordingly. With theproliferation of context-aware systems and smart sensors, real-time monitoring of environmental situations (context) has become quite trivial. However,it is often challenging because the imperfect nature of context can cause theinconsistent behavior of the system. In this paper, we propose a contextaware intelligent decision support formalism to assist cognitively impairedpeople in managing their routine life activities. For this, we present a semanticknowledge-based framework to contextualize the information from the environment using the protégé ontology editor and Semantic Web Rule Language(SWRL) rules. The set of contextualized information and the set of rulesacquired from the ontology can be used to model Context-aware Multi-AgentSystems (CMAS) in order to autonomously plan all activities of the users andnotify users to act accordingly. To illustrate the use of the proposed formalism,we model a case study of Mild Cognitive Impaired (MCI) patients usingColored Petri Nets (CPN) to show the reasoning process on how the contextaware agents collaboratively plan activities on the user’s behalf and validatethe correctness properties of the system.

关键词： Context-awareness multi-agents colored petri net ontology

Schamel equation in an inhomogeneous magnetized sheared flow plasma with q-nonextensive trapped electrons

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Chinese Physics B 2018年第2期27卷 428-434页

作者： Shaukat Ali Shan Qamar-ul-haque Theoretical Physics Division (TPD) PINSTECH

An investigation is carried out for understanding the properties of ion–acoustic（IA） solitary waves in an inhomogeneous magnetized electron-ion plasma with field-aligned sheared flow under the impact of q-nonextensive trapped electrons. The Schamel equation and its stationary solution in the form of solitary waves are obtained for this inhomogeneous plasma. It is shown that the amplitude of IA solitary waves increases with higher trapping efficiency（β）, while the width remains almost the same. Further, it is found that the amplitude of the solitary waves decreases with enhanced normalized drift speed, shear flow parameter and the population of the energetic particles. The size of the nonlinear solitary structures is calculated to be a few hundred meters and it is pointed out that the present results are useful to understand the solar wind plasma.

关键词： sheared flow plasma density inhomogeniety electron trapping

All-Weather Strategic Cooperative Partnership:My Reflections on China

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China News Release 2023年第10期 56-58页

作者： Moin ul haque 不详

Serving in China and particularly as an ambassador is a dream of every Pakistani diplomat.I am no exception either.I was serving as Pakistani ambassador to France when I learned about my posting to China.I was overjoyed but also humbled by the challenge and huge responsibility bestowed on me by my government to serve in a country with which we enjoy special and unique relations.

关键词： relations. China. Pakistan

Global transmission diagrams for evanescent waves in a nonlinear hyperbolic metamaterial

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Chinese Optics Letters 2015年第9期13卷 1-5页

作者： Munazza Zulfiqar Ali Ashfaq Ahmad Bhatti Qamar ul haque Shahzad Mahmood Physics Department Punjab University Theoretical Physics Division PINSTECH

A theoretical model of a nonlinear hyperbolic metamaterial is presented in the form of a stack of subwavelength layers of linear plasmonic and nonlinear dielectric materials. A broad picture of the properties of evanescent waves （high-k modes） in this stack is investigated by plotting global transmission diagrams. The presence of nonlinearity strongly modifies these diagrams. The emergence and modification of nonlinear evanescent waves is observed. Some signatures of nonlinear phenomenon such as formation of orbits and trajectories around fixed points are also seen in our work.

关键词： Global transmission diagrams for evanescent waves in a nonlinear hyperbolic metamaterial

Assessment of Groundwater Physico-Chemical Quality in the Ouémé Delta (Southern-Benin)

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Journal of Environmental Protection 2024年第3期15卷 298-317页

作者： Aoulatou Alassane Zakari Dadja Toyou Masamaéya Gnazou Abdoukarim Alassane Kodjo Apelete Raoul Kpegli Ousmane Touré Boukari Bio Guidah Chabi Bénito Didier Koukpohounsi Daouda Mama Laboratory of Applied Hydrology National Water Institute University of Abomey-Calavi Benin (LHA/INE/UAC) Cotonou B&eacutenin International Chair in Mathematical Physics and Applications (ICMPA—UNESCO Chair) Cotonou B&eacutenin Laboratory of Applied Hydrology and Environment Faculty of Sciences University of Lom&eacute Togo (LHAE/FDS/UL) Lom&eacute Togo

Groundwater resources are the main sources of water used to supply drinking water to the population of the Ouémé Delta via the Continental Terminal aquifer. Urbanization, population growth, and agricultural and industrial activities have resulted in a deterioration in the quality of these resources. To assess the quality of the delta’s groundwater and its suitability for human consumption and irrigation, a total of fourteen (14) physico-chemical parameters were analyzed in some forty existing water points between September 2020 and March 2021, using standard water analysis techniques. The values obtained were compared with the potability standards recommended by the World Health Organization (WHO) and the Republic of Benin and were subjected to statistical analysis (principal component analysis (PCA)). In addition, methods for determining the suitability of water for irrigation were used. The results showed that the waters are acidic to slightly neutral and influenced by ambient temperature. In addition, the waters are moderately mineralized, with conductivities (24 - 1205 μS/cm) in line with WHO standards. A comparison of the analytical results of the WHO (2017) and Benin (2001) standards indicates that the majority of the waters studied are of good quality for all the chemical parameters considered. Nevertheless, some samples show levels of nitrates (21%), potassium (14% to 16%), calcium (13%), ammonium (12%), nitrites (8%) and bicarbonates (10%) over their respective standards. The Wilcox and Riverside diagrams indicate that the majority of waters (90%) have excellent suitability for irrigation and no negative effect on soil fertilization.

关键词： Benin OuéméDelta Groundwater Physico-Chemical Quality Consumption Irrigation

基于光谱学分析的硬质聚氨酯泡沫/钢渣/次磷酸铝复合材料阻燃机理研究

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光谱学与光谱分析 2024年第5期44卷 1487-1493页

作者：刘梦茹戴震龙红明张浩季益龙杨亚东唐刚安徽工业大学建筑工程学院安徽马鞍山243032 安徽工业大学材料工程学院安徽马鞍山243032 冶金减排与资源综合利用教育部重点实验室(安徽工业大学) 安徽马鞍山243032 安徽工业大学冶金工程学院安徽马鞍山243032

硬质聚氨酯泡沫(RPUF)的优异性能使其在各领域被广泛应用,但本身的易燃性为其在应用过程中埋下了巨大的安全隐患。钢渣(SS)作为提炼铁精矿后排放的固体废弃物,因其综合利用效率低下而造成一系列环境污染问题。为提高RPUF火灾安全性和钢... 详细信息

硬质聚氨酯泡沫(RPUF)的优异性能使其在各领域被广泛应用,但本身的易燃性为其在应用过程中埋下了巨大的安全隐患。钢渣(SS)作为提炼铁精矿后排放的固体废弃物,因其综合利用效率低下而造成一系列环境污染问题。为提高RPUF火灾安全性和钢渣的附加值,将SS和次磷酸铝(AHP)引入到RPUF中,采用一步全水发泡法,制备一系列阻燃RPUF(FR-RPUF)复合材料。利用射线荧光光谱分析(XRF)探究了SS的化学成分,并系统研究了SS/AHP对FR-RPUF复合材料的微观形貌、热稳定性、阻燃性能以及气相产物的影响。XRF测试表明:钢渣的化学成分主要是CaO、SiO_(2)、Al_(2)O_(3)、Fe_(2)O_(3)、SO_(3)、MgO,以上金属氧化物能够作为协效剂促进聚合物成炭,并覆盖在材料表面阻隔燃烧热,在凝聚相达到阻燃目的。扫描电镜(SEM)测试表明:SS/AHP与RPUF基体的相容性较差导致FR-RPUF的泡孔出现不同程度的破损。阻燃测试表明:RPUF-1、RPUF-4、RPUF-5的极限氧指数分别为24.2 vol%、23.4 vol%、19.7 vol%,说明SS和AHP存在一定的协效阻燃作用,且RPUF/SS/AHP复合材料全部通过ul-94 V-0级别,满足外墙保温材料使用要求。热重-红外分析(TG-FTIR)测试表明:SS/AHP并未改变RPUF的降解过程,气相产物主要为碳氢化合物、羰基化合物、氨基甲酸酯、CO_(2)、异氰酸酯化合物、芳香族化合物、氰化氢、羰基化合物和酯类。对典型挥发性产物进一步分析发现,AHP和SS的加入促进RPUF基体早期降解。拉曼测试表明:当SS/AHP加入到RPUF后,RPUF-4的D峰与G峰的峰面积比(I_(D)/I_(G))值最小,表明SS/AHP的加入提高了FR-RPUF复合材料炭渣的致密性、石墨化程度。结合上述分析提出阻燃机理:首先AHP吸热分解,降低了火焰周围的温度,其分解的PO·自由基捕获游离的HO·抑制连锁反应,分解产生的焦磷酸铝与炭渣覆盖在基体表面,抑制了火焰和可燃气体的扩散。AHP分解产生的PH3遇氧气生成酸性物质(磷酸和聚磷酸),促进了RPUF脱水成炭,并且钢渣中的矿物成分会与磷酸或聚磷酸反应,形成致密炭层,与AHP共同发挥协效阻燃作用。研究为SS和AHP复配阻燃硬质聚氨酯泡沫材料提供理论依据和实验基础。

关键词：光谱学分析硬质聚氨酯泡沫钢渣次磷酸铝复合材料阻燃机理

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车轮踏面形状的计算机辅助设计

国外铁道车辆 1990年第6期27卷 17-20页

作者： Imtiaz-ul-haque 韦苏来

轮轨几何参数通过轮轨间的作用力,对铁道车辆的动力学性能产生极大的影响。本文论述了系统设计车轮踏面形状的计算方法,该方法采用了非线性程序和最优化方法。由此设计的车轮踏面可使车辆获得良好的动力学性能,且能限制磨耗,理论研究说... 详细信息

轮轨几何参数通过轮轨间的作用力,对铁道车辆的动力学性能产生极大的影响。本文论述了系统设计车轮踏面形状的计算方法,该方法采用了非线性程序和最优化方法。由此设计的车轮踏面可使车辆获得良好的动力学性能,且能限制磨耗,理论研究说明了这种计算方法的可行性。

关键词：车轮踏面形状 CAD