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Dynamic voltage regulation and power export in a distribution system using distributed generation

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第10期10卷 1523-1531页

作者： aamir hanif Muhammad Ahmed CHOUDHRY Department of Electrical Engineering University of Engineering and Technology

The major aim of power quality(PQ) enhancing techniques is to maintain a specified voltage magnitude at a desired frequency for sensitive loads irrespective of faults on the power distribution *** dynamic voltage restorer(DVR) is a device used to mitigate voltage sags to regulate load *** paper presents a mathematical model for leading series voltage injection to mitigate sags thereby achieving the improvement of the utility power factor as well as power sharing between the DVR and *** power sharing will be as per requirement to compensate the sags considering the available distributed generation(DG).The approach of mitigating voltage sags using the concept of leading series voltage injection is suitable for those locations where phase shift in the voltage will not cause any *** MATLAB/SIMULINK SimPowerSystem toolbox has been used to obtain simulation results to verify the proposed mathematical model.

关键词： Power quality Distributed generation Voltage sags Series injection

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Recent Advances on Porous Materials for Synergetic Adsorption and Photocatalysis

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Energy & Environmental Materials 2022年第3期5卷 711-730页

作者： Tianqi Wang Bingbing Tian Bin Han Dingren Ma Mingzhe Sun aamir hanif Dehua Xia Jin Shang International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China School of Energy and Environment City University of Hong KongTat Chee AvenueKowloonHong Kong China Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060China Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China School of Environmental Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China City University of Hong Kong Shenzhen Research Institute Nanshan District8 Yuexing 1st RoadShenzhen Hi−Tech Industrial ParkShenzhen 518060China Department of Chemistry Islamic University of Science and TechnologyAwantipora 192122India

Porous photocatalysts are promising materials capable of simultaneously adsorbing and oxidizing/reducing target species,showing great potentials in environmental remediation and energy *** review offered a comprehensive overview of the recent progress in design,fabrication,and applications of porous photocatalysts,including carbon-based semiconductors,metal oxides/sulfides,metal–organic frameworks,and adsorbent–photocatalyst *** fundamental understanding of the structure–performance relationships of porous materials together with the in-depth insights into the synergetic effects between adsorption and photocatalysis was *** strategies to further improve the photocatalytic activity of porous photocatalysts were *** review would provide references and outlooks of constructing efficient porous materials for adsorptive and photocatalytic removal of pollutants and energy production.

关键词： adsorption photocatalysis porous materials synergetic effect

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N-doped graphitic carbon encapsulating cobalt nanoparticles derived from novel metal–organic frameworks for electrocatalytic oxygen evolution reaction

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中国化学快报:英文版 2023年第8期34卷 472-477页

作者： Yuanmeng Tian Hao Wu aamir hanif Yanli Niu Ying Yin Yangyi Gu Zuofeng Chen Qinfen Gu Yun Hau Ng Jin Shang Liangchun Li Mingxian Liu Shanghai Key Lab of Chemical Assessment and Sustainability School of Chemical Science and EngineeringTongji UniversityShanghai 200092China School of Energy and Environment City University of Hong KongHong Kong SAR 999077China City University of Hong Kong Shenzhen Research Institute Shenzhen 518000China Macao Institute of Materials Science and Engineering Faculty of Innovation EngineeringMacao University of Science and TechnologyMacao SAR 999078China Australian Synchrotron(ANSTO) Victoria 3168Australia

Nitrogen-doped carbon catalysts with hierarchical porous structure are promising oxygen evolution reaction(OER)catalysts due to the faster mass transfer and better charge carrying ***,an exquisite high nitrogen-containing ligand was designed and readily synthesized from the low-cost biomolecule ***,three new MOFs(TJU-103,TJU-104 and TJU-105)were prepared using the Co(II)or Mn(II)ions as metal *** rationally controlling pyrolysis condition,in virtue of the high nitrogen content in well-defined periodic structure of the pristine MOFs,TJU-104–900 among the derived MOFs with hierarchical porous structure,i.e.,N-doped graphitic carbon encapsulating homogeneously distributed cobalt nanoparticles,could be conveniently *** to the synergistic effect of the hierarchical structure and well dispersed active components(i.e.,C=O,Co–Nx,graphitic C and N,pyridinic N),it could exhibit an overpotential of 280 mV@10mA/cm^(2)on carbon cloth for OER *** work provides the inspiration for fabrication of nitrogen-doped carbon/metal electrocatalysts from cost-effective and abundant biomolecules,which is promising for practical OER application.

关键词： Metal-organic frameworks Oxygen evolution reaction High nitrogen content Cobalt nanoparticles Hierarchical structure

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Smart Devices Based Multisensory Approach for Complex Human Activity Recognition

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Computers, Materials & Continua 2022年第2期70卷 3221-3234页

作者： Muhammad Atif hanif Tallha Akram aamir Shahzad Muhammad Attique Khan Usman Tariq Jung-In Choi Yunyoung Nam Zanib Zulfiqar Department of Electrical and Computer Engineering COMSATS University IslamabadWah Campus47040Pakistan Department of Electrical and Computer Engineering COMSATS University IslamabadAbbottabad Campus22040Pakistan Department of Computer Science HITEC University TaxilaTaxilaPakistan College of Computer Engineering and Sciences Prince Sattam Bin Abdulaziz UniversityAl-KhrajSaudi Arabia Department of Applied Artificial Intelligence Ajou UniversitySuwonKorea Department of Computer Science and Engineering Soonchunhyang UniversityAsanKorea Department of Electrical and Computer Engineering CUISahiwalPakistan

Sensors based Human Activity Recognition(HAR)have numerous applications in eHeath,sports,fitness assessments,ambient assisted living(AAL),human-computer interaction and many *** human physical activity can be monitored by using wearable sensors or external *** usage of external devices has disadvantages in terms of cost,hardware installation,storage,computational time and lighting conditions ***,most of the researchers used smart devices like smart phones,smart bands and watches which contain various sensors like accelerometer,gyroscope,GPS etc.,and adequate processing *** the task of recognition,human activities can be broadly categorized as basic and complex human *** of complex activities have received very less attention of researchers due to difficulty of problem by using either smart phones or smart *** reasons include lack of sensor-based labeled dataset having several complex human daily life *** of the researchers have worked on the smart phone’s inertial sensors to perform human activity recognition,whereas a few of them used both pocket and wrist *** this research,we have proposed a novel framework which is capable to recognize both basic and complex human activities using builtin-sensors of smart phone and smart *** have considered 25 physical activities,including 20 complex ones,using smart device’s built-in *** the best of our knowledge,the existing literature consider only up to 15 activities of daily life.

关键词： Complex human activities human daily life activities features extraction data fusion multi-sensory smartwatch smartphone

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