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稀土学报:英文版 2023年第9期41卷 1367-1375,I0004页

作者： Murad Murad Zahid ali muhammad Idrees Centre for Computational Materials Science Department of PhysicsUniversity of MalakandChakdaraDir(Lower)18800KPPakistan

Hybrid density functional theory was used to investigate the structural,electronic,magnetic and elastic properties of the Laves phase binary intermetallics RFe_(2)(R=La,Ce,Pr and Nd) in C_(15) crystal *** calculated lattice constants of these materials are found in good agreement with the *** band structures and density of states distribution confirm the metallic nature of all these *** optimized energies in different magnetic phases and magnetic susceptibilities by postDFT treatments confirm that all the understudy compounds are ferromagnetic in *** parameters were calculated from the cubic elastic coefficients C_(11),C_(12) and C_(44).The elastic properties reveal that these intermetallics are incompressible,ductile,elastically anisotropic and mechanically *** on the metallic nature and ferromagnetic properties,it is expected that these intermetallics are suitable materials for spintronic technology.

关键词： Intermetallics Laves phase Density functional theory Electronic band structures Magnetic properties Elastic properties

Drought Stress Impairs Grain Yield and Quality of Rice Genotypes by Impaired Photosynthetic Attributes and K Nutrition

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Rice science 2020年第1期27卷 5-9页

作者： muhammad Zahid mumtaz muhammad SAQIB Ghulam ABBAS Javaid AKHTAR Zia Ul-QAMAR Institute of Soil and Environmental Sciences University of Agriculture Institute of Molecular Biology and Biotechnology The University of Lahore Department of Environmental Sciences COMSATS University Plant Breeding and Genetics Division Nuclear Institute for Agriculture and Biology

Drought is one of the most prevalent abiotic stresses that adversely affect rice productivity(Petrozza et al, 2014). Rice is very sensitive to drought stress and drought can cause 50% reduction in rice production globally(Yang et al, 2008). To meet the food needs for global population, 63% more agricultural production will be required by the year 2050 than.

关键词： drought Yield globally

Deep Learning-Based Robust DC Fault Protection Scheme for Meshed HVDC Grids

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2423-2434页

作者： muhammad Zain Yousaf Hui Liu ali Raza ali Mustafa the School of Electrical Engineering Guangxi UniversityNanning 530004China the School of Electrical Engineering University of LahoreLahore 39161Pakistan the School of Electrical Engineering Xi’an Jiaotong UniversityXi’an 710049China

Fast and reliable detection of faults is a significant technical challenge in transient-based protection for a modular multi-level converter(MMC)based high voltage direct current(HVDC)*** is because existing protection schemes rely heavily upon setting a complicated protective threshold,the failure of which causes high DC-fault currents in HVDC grids,and MMC is prone to such strong transient *** this context,this paper proposes a DC-line fault diagnosis technique based on a tuned long-short-term memory(LSTM)algorithm to improve the response and accuracy of transient-based *** discrete wavelet transform(DWT)extracts the transient features of DC-line voltages in the frequency-time *** healthy and faulty samples are incorporated during training even by considering the noise *** training,numerous test samples are run to evaluate the proposed algorithm’s robustness under various fault *** results show the proposed algorithm can detect DC faults and has a high recognition accuracy of 98.6%.Compared to contemporary techniques,it can perform well to identify DC-line faults because of the efficient training of characteristic features.

关键词： High voltage direct current(HVDC) longshort-term-memory(LSTM) primary protection voltage source converters(VSC)

Reversible Protein Adsorption on PMOXA/PAA Based Coatings:Role of PAA

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Chinese Journal of Polymer Science 2018年第12期36卷 1328-1341页

作者： Fatima mumtaz Chao-Shi Chen Hai-Kun Zhu muhammad Atif Yan-Mei Wang Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China

In this study we report design of stimuli-resP0nsive coating based on poly（2-methyl-2-oxazoline-random-glycidyl methacrylate）（PMOXA-r-GMA） comb copolymer and poly（acrylic acid）-block-poly（glycidyl methacrylate）（PAA-b-PGMA） block copolymers and scrutinize its ability to control protein adsorption. Firstly, PMOXA/PAA based coatings were prepared by simply spin coating the mixture of PMOXA-r-GMA and PAA-b-PGMA copolymer solutions onto silicon substrates followed by annealing at 110℃. Then coatings were rigorously characterized by X-ray photoelectron spectroscopy （XPS）, the static water contact angle （WCA） test, ellipsometry and atomic force microscopy （AFM）. After that, the relationship of switchable behavior of PMOXA/PAA based coatings with PAA content and chain length was investigated through the change of thickness and WCA upon pH and ionic strength （I） trigger, which indicated that the change in thickness and WCA was triggered when PAA contents were increased as well as by increasing chain length of PAA in PMOXA/PAA based coatings. Finally, real-time adsorption/desorption of lysozyme （Lyso） on PMOXA/PAA based coatings was monitored using quartz crystal microbalance with dissipation monitoring （QCM-D）. The results showed that the Lyso adsorption amount was increased upon increasing chain length and contents of PAA in PMOXA/PAA based coatings. The adsorbed Lyso was then efficiently desorbed by changing pH and I of medium with the maximum desorption （〉 90% desorption percentage） observed for the suitable ratio of PMOXA and PAA while chain length of PAA was kept longer than that of PMOXA. Furthermore, the prepared coatings were found to repeatedly adsorb and desorb Lyso for four successive cycles of adsorption/desorption, which confirmed the stability of prepared coatings.

关键词： Binary polymer brushes Stimuli-responsive coating Reversible protein adsorption Quartz crystal microbalance

Incidence and predictors of hypocalcemia in end-stage renal disease patients on denosumab therapy: A systematic review and metaanalysis

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World Journal of Meta-Analysis 2024年第3期12卷 68-78页

作者： Abdul Hannan Siddiqui Misbah Shaikh Afia Salman muhammad Ahmed ali Fahim Fizzah Batool Tahreem Mari Sarah Musani Muneeb Fareed Rooma Rehan Amna Hassni Urooj Nizami Ayesha Amir Abdul Moeed Salim R Surani Department of Internal Medicine Dow University of Health SciencesKarachi 74200SindhPakistan Department of Medicine&Pharmacology Texas A&M UniversityCollege StationTX 77843United States

BACKGROUND Denosumab inhibits the receptor activator of nuclear factor *** markedly increases bone mineral density and has been proven to reduce the risk of ***,numerous adverse effects,notably hypocalcemia,are prevalent in patients with end-stage renal disease(ESRD).AIM To analyze the incidence and predictors of hypocalcemia caused by denosumab compared to control in patients with *** We conducted this study in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-analyses ***,Scopus,Cochrane Central,and EMBASE were systematically searched from inception through March *** original studies investigating the effects of denosumab on patients with ESRD compared to control were *** primary outcomes of our study were the incidence of mild,severe,and very severe *** outcomes included serum levels of intact parathyroid hormone,calcium,and *** results were pooled and analyzed using a random-effects *** Seven articles comprising 3240 patients were included in our *** treated with denosumab had a significantly increased incidence of mild hypocalcemia[risk ratio(RR):2.79;95%confidence interval(CI):0.99-7.91;P=0.05;I^(2)=37%]and of very severe hypocalcemia(RR:9.58;95%CI:1.58-57.98;P=0.01;I^(2)=49%).However,an increase in the occurrence of severe hypocalcemia was non-significant(RR:4.23;95%CI:0.47-38.34;P=0.20;I^(2)=96%).Alternatively,denosumab showed a significant decrease in serum intact parathyroid hormone[mean difference(MD):-433.20,95%CI:-775.12 to-91.28,I2=98%,P=0.01],while there was a non-significant decrease in phosphate(MD:-0.47,95%CI:-1.35 to 0.41,I^(2)=88%,P=0.30)and calcium levels(MD:-0.33,95%CI:-0.95 to 0.29,I^(2)=94%,P=0.29).CONCLUSION Our study demonstrated that denosumab is significantly associated with mild and very severe hypocalcemia in patients with ESRD making it necessary to detect and prevent this side effect of treatmen

关键词： Denosumab End-stage renal disease Hypocalcemia Parathyroid hormone Dialysis

Multifaceted roles of extracellular RNAs in different diseases

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Military Medical Research 2023年第3期10卷 359-368页

作者： Abdullah muhammad Sohail muhammad Babar Khawar ali Afzal ali Hassan Sara Shahzaman Ahmed ali Molecular Medicine and Cancer Therapeutics Lab Department of ZoologyFaculty of SciencesUniversity of Central PunjabLahorePakistan Applied Molecular Biology and Biomedicine Lab Department of ZoologyUniversity of NarowalNarowalPakistan

Extracellular RNAs(exRNAs) are novel circulating factors that can be used as biomarkers in various diseases. Their unique and diverse kinds, as well as their role as biomarkers, make them significant biomarkers. There has been immense work carried out since the discovery of exRNAs in circulation and other biological fluids to catalog and determine whether exRNAs may be utilized as indicators for health and illness. In this review, we aim to understand the current state of exRNAs in relation to various diseases and their potential as biomarkers. We will also review current issues and challenges faced in using exRNAs, with clinical and lab trials, that can be used as viable markers for different diseases.

关键词： Extracellular RNAs(exRNAs) Extracellular vehicles(EVs) Cancer Biomarkers Exosomes

Structural Improvements in Consensus Based Cooperative Control of DC Microgrids

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Structural Improvements in Consensus Based Cooperative Contr...

作者： muhammad Adnan mumtaz 上海交通大学

学位级别：硕士

电力能源危机是大多数发展中国家最基本、最具挑战性的问题之一。这是因为,大多数传统发电厂以燃料或天然气资源为基础,成本昂贵,并且会对环境产生不利影响。现代电力系统因其具备环保性、无限可用性,并且可以用作不可再生能源的短期补...

电力能源危机是大多数发展中国家最基本、最具挑战性的问题之一。这是因为,大多数传统发电厂以燃料或天然气资源为基础,成本昂贵,并且会对环境产生不利影响。现代电力系统因其具备环保性、无限可用性,并且可以用作不可再生能源的短期补充,为可再生能源的使用提供了更多可能。近年来,由于可再生能源需求不断增加,以及能源整合对促进郊区电气化具有重要意义,微电网的理念受到了广泛关注。微电网是一个能够同时与电力存储系统、分布式世代和多个用户互联的小型配电系统,它在整合可再生能源的过程中发挥着至关重要的作用。微电网同时依赖分布式能源、先进的电力电子转换器、通信结构和储能电池等多种技术,可分为交流和直流微电网。近年来,直流微电网以其系统稳定性好、效率高、电能质量好、AC/DC转换级数量少和灵活性好等优点而受到广泛关注。在直流微电网中,能源资源、电池和负载通过并行连接的DC-DC降压转换器连接到公共总线,如何控制DC-DC降压转换器是直流微电网的关键操作。直流微电网控制中最基本的、具有挑战性的问题之一是保证电流共享比例的公平性,从而在实现电压调节的同时,实现分布式世代向分布式负载的公平调度,使得所需的直流母线电压在并行连接的分布式电源中保持稳定。下垂控制方法通常用于实现并行转换器之间的比例负载共享,但传统下垂控制方法的局限性限制了其可靠性。为了提高系统的稳定性和控制性能,本文提出了如下的结构改进方案。在变频器内电流控制回路中,外部电压控制回路采用简单的比例控制器作为有限增益控制器;由于有限增益控制器的下垂,本文方法无需下垂系数就可以实现功率共享。为了进一步提高功率共享精度和直流电压调节,本文采用了一种基于共识的合作控制方法来估计平均电流和平均电压差。此外,平均电压和电流差控制器可以降低通信延迟效应。本文还利用小信号分析对局部控制器的稳定性和控制性能进行了分析,并在实验过程中采用了不同的通信延迟和电流扰动。最后,在MATLAB/Simulink环境中开发了一个基于四节点的直流微电网设置,并对本文技术和现有技术的仿真结果进行了研究。仿真结果验证了本文提出的控制技术的有效性。

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Surfactant-decorated graphite nanoplatelets(GNPs) reinforced aluminum nanocomposites: sintering effects on hardness and wear

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International Journal of Minerals,Metallurgy and Materials 2018年第6期25卷 704-715页

作者： Zeeshan Baig Othman Mamat Mazli Mustapha Asad mumtaz Sadaqat ali Mansoor Sarfraz Department of Mechanical Engineering Universiti Teknologi PETRONAS Department of Fundamental and Applied Sciences Universiti Teknologi PETRONAS Sustainable Energy Technologies Center College of Engineering King Saud University

The exceptional properties of graphene make it ideal as a reinforcement to enhance the properties of aluminum matrices and this critically depends on uniform dispersion. In this study, the dispersion issue was addressed by sonication and non-covalent surface functionalization of graphite nanoplatelets（GNPs） using two types of surfactant： anionic（sodium dodecyl benzene sulfate（SDBS）） and non-ionic polymeric（ethyl cellulose（EC））. After colloidal mixing with Al powder, consolidation was performed at two sintering temperatures（550 and 620°C）. The structure, density, mechanical and wear properties of the nanocomposite samples were investigated and compared with a pure Al and a pure GNPs/Al nanocomposite sample. Noticeably, EC-based 0.5 wt% GNPs/Al samples showed the highest increment of 31% increase in hardness with reduced wear rate of 98.25% at 620°C, while a 22% increase in hardness with reduced wear rate of 96.98% at 550°C was observed, as compared to pure Al. Microstructural analysis and the overall results validate the use of EC-based GNPs/Al nanocomposites as they performed better than pure Al and pure GNPs/Al nanocomposite at both sintering temperatures.

关键词： graphite nanoplatelets (GNPs) aluminum nanocomposites surfactant hardness dispersion ultra-soincation sintering effects

Algebraic Properties for Molecular Structure of Magnesium Iodide

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Computer Modeling in Engineering & Sciences 2023年第5期135卷 1131-1146页

作者： ali N.A.Koam ali Ahmad muhammad Azeem muhammad Kamran Siddiqui Department of Mathematics College of ScienceNew CampusJazan UniversityJazanSaudi Arabia College of Computer Science and Information Technology Jazan UniversityJazanSaudi Arabia Department of Mathematics Riphah Institute of Computing and Applied SciencesRiphah International UniversityLahorePakistan Department of Mathematics COMSATS University IslamabadLahorePakistan

As an inorganic chemical,magnesium iodide has a significant crystalline *** is a complex and multifunctional substance that has the potential to be used in a wide range of medical *** graph theory,on the other hand,provides a sufficient and cost-effective method of investigating chemical structures and networks.M-polynomial is a relatively new method for studying chemical networks and structures in molecular graph *** displays numerical descriptors in algebraic form and highlights molecular features in the form of a polynomial *** present a polynomials display of magnesium iodide structure and calculate several M-polynomials in this paper,particularly the M-polynomials of the augmented Zagreb index,inverse sum index,hyper Zagreb index and for the symmetric division index.

关键词： Magnesium iodide M-polynomials algebraic properties of magnesium iodide algebraic formation of numerics of magnesium iodide

The Impact of Internet of Things Supported by Emerging 5G in Power Systems: A Review

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CSEE Journal of Power and Energy Systems 2020年第2期6卷 344-352页

作者： Jinsong Tao muhammad Umair muhammad ali Jian Zhou School of Electrical Engineering and Automation Wuhan UniversityHubei 430072China

The Internet of Things(IoT)is playing an important role in providing access to affordable,clean and green energy worldwide through the use of smart *** current electric power networks will be more reliable,secure,flexible and durable by implementing IoT in power *** paper presents a brief discussion about IoT contributions in the development of power systems from a generation,transmission,distribution and consumption point of view.5G cellular networks have a great potential for the development of IoT ***,5G cellular networks can be instrumental in supporting the greater communication needs of *** review provides a comprehensive analysis about the role of 5G cellular networks in the growth of IoT technology and power *** amounts of data will be generated due to the incorporation of renewable energy,deployment of the smart grid and the improvements to the electricity *** this way,in order to realize the connection between things and people,things and things and people and people in power systems,it is essential to apply IoT in power *** this case,5G is providing numerous advantages to Power IoT(PIoT)by offering greater opportunities in progress and improvements;however,there are also numerous challenges with the deployment of 5G in ***,this review article provides an overview of the role,implications and challenges of 5G in PIoT.

关键词： Fifth Generation(5G) Internet of Things(IoT) Power IoT(PIoT)