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Ionospheric precursors of strong earthquakes observed using six GNSS stations data during continuous five years(2011-2015)

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Geodesy and Geodynamics 2023年第1期14卷 65-79页

作者： H.E.Eshkuvatov B.J.Ahmedov Y.A.Tillayev m.Arslan Tariq m.ali shah Libo Liu Ulugh Beg Astronomical Institute Astronomy St.33Tashkent 100052Uzbekistan National University of Uzbekistan University St.4Tashkent 100174Uzbekistan Institute of Fundamental and Applied Research National Research University TIIAMEKori Niyoziy 39Tashkent 100000Uzbekistan Centre for Earthquake Studies National Centre for PhysicsIslamabadPakistan Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Heilongjiang mohe Observatory of Geophysics Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina

This study reports the morphological characteristics of anomalous variations in Global Navigation Satellite System Total Electron Content(GNSS-TEC) prior to the strong local earthquakes(EQ) that occurred during the period of *** have analyzed 20 earthquakes of magnitude m> 5.6.A statistical technique is implemented on the data of six GNSS stations located in Tashkent,Kitab,and maidanak in Uzbekistan,and Islamabad,multan,Quetta in *** results show continuous anomalous variations in TEC during 24 h befo re the occupancy of local *** is shown that the precursors before the occurrence of strong earthquakes,in particular of magnitude 5.7,7.7,7.5,7.8 and 7.3 are detected near Eastern Uzbekistan(26 may 2013),Southwestern Pakistan(24 September 2013),Hindukush region of Afghanistan(26 October 2015),and Central Nepal(25 April 2015) and(12 may 2015),*** ionospheric anomalies appearing before the strong earthquakes at six GNSS stations are registered in 14cases(70%) out of 20 selected *** is depicted that anomalies referred to as ionospheric precursors appeared about 1-7 days prior to the occurrence of strong earthquakes.

关键词： GNSS TEC Earthquakes Ionospheric precursors

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巴基斯坦沿海地区地震危险性分析

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地震学报 2003年第4期25卷 361-373页

作者： shahid A.Khan m.ali shah m.Qaisar 李亚琦巴基斯坦原子能委员会微震研究项目组

通过确定性和概率性方法 ,对发展迅速的巴基斯坦沿海地区进行了地震危险性评估 .根据该地区的地震构造和地质条件 ,确定了 5个地震区域的 11个断层作为该地区的潜在震源 ,计算了每个潜在震源的最大可能震级 .根据与之相关震源的最大可... 详细信息

通过确定性和概率性方法 ,对发展迅速的巴基斯坦沿海地区进行了地震危险性评估 .根据该地区的地震构造和地质条件 ,确定了 5个地震区域的 11个断层作为该地区的潜在震源 ,计算了每个潜在震源的最大可能震级 .根据与之相关震源的最大可信震级 ,计算了 7个沿海城市的峰值加速度 (PGA) .瓜达尔 (Gwadar)和奥尔马腊 (Ormara)的峰值加速度分别为 0 .2 1和 0 .2 5 g ,处于地震危险性水平较高的地区 ;杜尔伯德 (Turbat)和卡拉奇 (Karachi)位于地震危险性水平较低的地区 ,峰值加速度小于 0 .1g .同时 ,分别绘制了 5 0年和 10 0年超越概率为 10 %的PGA区划图 ,区划图的分区间隔为 0 .0 5 g .

关键词：巴基斯坦沿海地区地震危险性潜在震源断层超越概率

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macular microvascular and structural changes on optical coherence tomography angiography in atypical optic neuritis

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World Journal of methodology 2025年第1期15卷 88-94页

作者： Chinmay mahatme madhurima Kaushik Veerappan Rathinasabapathy Saravanan Karthik Kumar Virna m shah Department of General Ophthalmology Aravind Eye HospitalCoimbatore 641014Tamil NāduIndia Department of Neuro-ophthalmology Aravind Eye HospitalCoimbatore 641014Tamil NāduIndia Department of Vitreoretina Aravind Eye HospitalCoimbatore 641014Tamil NāduIndia

BACKGROUND Atypical optic neuritis,consisting of neuromyelitis optica spectrum disorders(NmOSD)or myelin oligodendrocyte glycoprotein antibody disease(mOGAD),has a very similar presentation but different prognostic implications and longterm management *** and metabolic factors are being thought to play a role in such autoimmune neuro-inflammatory disorders,apart from the obvious immune mediated *** the advent of optical coherence tomography angiography(OCTA),it is easy to pick up on these subclinical macular microvascular and structural *** To study the macular microvascular and structural changes on OCTA in atypical optic *** This observational cross-sectional study involved 8 NmOSD and 17 mOGAD patients,diagnosed serologically,as well as 10 healthy *** vascular density(mVD)and ganglion cell+inner plexiform layer thickness(GCIPL)were studied using *** There was a significant reduction in mVD in NmOSD and mOGAD affected as well as unaffected eyes when compared with healthy *** and mOGAD affected eyes had significant GCIPL thinning compared with healthy *** unaffected eyes did not show significant GCIPL thinning compared to healthy controls in contrast to mOGAD unaffected *** comparing NmOSD with mOGAD,there was no significant difference in terms of mVD or GCIPL in the affected or unaffected *** Although significant microvascular and structural changes are present on OCTA between atypical optic neuritis and normal patients,they could not help in differentiating between NmOSD and mOGAD cases.

关键词： Optical coherence tomography angiography Atypical optic neuritis macular microvascular changes Neuromyelitis optica spectrum disorders myelin oligodendrocyte glycoprotein antibody disorder

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Alternative Strategy for Development of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑Temperature Solid Oxide Fuel Cells

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Nano-micro Letters 2025年第1期17卷 310-332页

作者： Sajid Rauf muhammad Bilal Hanif Zuhra Tayyab matej Veis mAKYousaf shah Naveed mushtaq Dmitry medvedev Yibin Tian Chen Xia martin motola Bin Zhu College of mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University BratislavaIlkovicova684215 BratislavaSlovakia Energy Storage Joint Research Center School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Hydrogen Energy Laboratory Ural Federal University620002 EkaterinburgRussia Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry620066 EkaterinburgRussia School of microelectronics Hubei UniversityWuhan 430062People’s Republic of China

The development of low-temperature solid oxide fuel cells(LT-SOFCs)is of significant importance for realizing the widespread application of *** has stimulated a substantial materials research effort in developing high oxide-ion conductivity in the electrolyte layer of *** this context,for the first time,a dielectric material,CaCu_(3)Ti_(4)O_(12)(CCTO)is designed for LT-SOFCs electrolyte application in this *** individual CCTO and its heterostructure materials with a p-type Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ)(NCAL)semiconductor are evaluated as alternative electrolytes in LT-SOFC at 450–550℃.The single cell with the individual CCTO electrolyte exhibits a power output of approximately 263 mW cm^(-2) and an open-circuit voltage(OCV)of 0.95 V at 550℃,while the cell with the CCTO–NCAL heterostructure electrolyte capably delivers an improved power output of approximately 605 mW cm^(-2) along with a higher OCV over 1.0 V,which indicates the introduction of high hole-conducting NCAL into the CCTO could enhance the cell performance rather than inducing any potential short-circuiting *** is found that these promising outcomes are due to the interplay of the dielectric material,its structure,and overall properties that led to improve electrochemical mechanism in CCTO–***,density functional theory calculations provide the detailed information about the electronic and structural properties of the CCTO and NCAL and their heterostructure CCTO–*** study thus provides a new approach for developing new advanced electrolytes for LT-SOFCs.

关键词： LT-SOFCs Dielectric CaCu_(3)Ti_(4)O_(12) Semiconductor Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ) Ionic conductivity Heterostructure electrolyte

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The Complex Dynamics of Hepatitis B Infected Individuals with Optimal Control

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Journal of Systems Science & Complexity 2021年第4期34卷 1301-1323页

作者： DIN Anwarud LI Yongjin shah murad ali Department of mathematics Sun Yat-sen UniversityGuangzhou 510275China School of mathematical Sciences Beiing Normal UniversityBeijing 100875China

This paper proposes various stages of the hepatitis B virus(HBV)besides its transmissibility and nonlinear incidence rate to develop an epidemic *** authors plan the model,and then prove some basic results for the well-posedness in term of boundedness and ***,the authors find the threshold parameter R0,called the basic/effective reproductive number and carry out local sensitive ***,the authors examine stability and hence condition for stability in terms of *** using sensitivity analysis,the authors formulate a control problem in order to eradicate HBV from the population and proved that the control problem actually *** complete characterization of the optimum system was achieved by using the 4th-order Runge-Kutta procedure.

关键词： Hepatitis B epidemic model non-linear incidence normalized sensitivity index numerical simulation optimization theory reproduction number stability analysis

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Distinguishing and Correlating multiple Phases of metamorphism across multiply Deformed Regions Using the Axes of Inclusion Trails in Porphyroblasts

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Acta Geologica Sinica(English Edition) 2011年第4期85卷 784-791页

作者： Ahmad Afroz shah Asghar ali School of Earth and Environmental Sciences James Cook UniversityTownsvilleQld 4811Australia

Successions of FIAs（foliation inflection/intersection axes preserved within porphyroblasts） provide a relative time scale for deformation and ***-situ dating of monazite grains preserved as inclusions within garnet and staurolite porphyroblasts within the foliations defining each FIA from such successions provides a rigorous approach to grouping ages that formed over extended periods of deformation and *** age and FIA progressions confirms the suitability of this approach plus provides access to lengthy histories that cannot otherwise be *** in the Big Thompson region of the Colorado Rocky mountains,USA began about a SW-NE trending axis defined by FIA set 1 at around 1761±13 *** periods of tectonism occurred around 1712±25 and 1672±21 ma about W-E and NW-SE trending FIAs 2 and 3, *** in the Balcooma metamorphic Group NW of Greenvale in NE Queensland, Australia began around 470 ma with the growth of garnet porphyroblasts about a W-E trending axis defined by FIA set *** monazite grains were preserved as inclusions in this mineral phase but they were in subsequently grown *** then occurred around 443.2±3.8,424±4 and 408.9±8.9 ma about NNW-SSE,SSW-NNE and W-E trending FIAs 2,3 and 4,*** test of a FIA based approach to monazite dating in tectonic regimes in different parts of the world and with dramatically different ages suggests it can be used in all orogens containing porphyroblasts preserving inclusion trails.

关键词： FIAs porphyroblast monazite Colorado Balcooma metamorphic Group

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melting Characteristics of a Phase Change material mixed with Nano Particles of Cobalt Oxide Bounded in a Trapezoidal Structure

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Computer modeling in Engineering & Sciences 2022年第1期130卷 255-268页

作者： Waris ali Asif ali Shaikh Feroz shah Sajjad Hussain Department of Basic Sciences and Related Studies Mehran University of Engineering and TechnologyJamshoroPakistan School of mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore Department of mathematics Govt Postgraduate College LayyahPunjabPakistan

A novel trapezoidal design for storage of heat energy through melting of phase-change material(PCm)is *** heat thermal energy storage system(LHTES)is a promising option to diminish mis-match between energy consumption and *** this purpose,Paraffin:Rubitherm-35(RT35)material is successively melted in aluminum structure which is heated from one side and the other sides are kept *** of PCm is observed experimentally and melt fronts are photographed for various time *** fluid-solid module in COmSOL multiphysics 5.4 has been *** transient heat conduction with enthalpy function is *** are carried out for enhancement of thermal conductivity through addition of nano-entities of cobalt oxide *** time is notably reduced with inclusion of nano-entities to enhance thermal *** time spans for melt start and total melt in case of pure PCm are 375 and 4500(s)respectively whereas for the nano mix case,these are 150 and 3000 *** 33%shorter time length is noticed for charging of the PCm trapezoidal matrix with nano entities of Co3O4 *** results fromsimulation and lab observations depict similar patterns and are in quite close comparison.

关键词： Trapezoidal enclosure nano entities heat transfer phase change material COmSOL multiphysics 5.4 numerical simulation

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Chemical study of limestone and clay for cement manufacturing in Darukhula,Nizampur District,Nowshera,North West Frontier Province(N.W.F.P.),Pakistan

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Chinese Journal Of Geochemistry 2008年第3期27卷 242-248页

作者： Khurshid ali Noor-ul-Amin m.Tahir shah Institute of Chemical Sciences University of Peshawar Pakistan National Center of Excellence in Geology University of PeshawarPakistan

Limestone and clay samples were collected from Darukhula and adjoining areas of the Nizampur District,Nowshera,N.W.F.P.,Pakistan,and analyzed for different parameters in order to search for new reserves of suitable material for the manufacture of different types of cements in *** was found that the area under study contains three types of limestones,including high grade limestone,Darukhula limestone and siliceous limestone,which contain 53%,49.03% and 45.19% CaO,respectively,and three types of clay,including maroon color,yellow to yellowish-green color and green color clay containing 57.76%,65.47% and 61.24% SiO2,*** analysis of the limestone and clay samples collected from the deposits in the area under study showed that all the elements found in these samples are within the range of permissible limits for the production of high-strength Portland cement,sulphate resisting cement and white *** paper covers the detailed version of the potential raw material deposits at Darukhula and adjoining areas of the Nizampur District.

关键词：水泥原材料 N.W.F.P. 化学制品黏土

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TiC-maraging stainless steel composite:microstructure, mechanical and wear properties

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Rare metals 2006年第6期25卷 630-635页

作者： Akhtar Farid Khadijah ali shah Syed Javid Askari School of material Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Particulate TiC reinforced 17-4PH and 465 maraging stainless steel matrix composites were processed by conventional powder metallurgy （P/m）. TiC-maraging stainless steel composites with theoretical density 〉97% were produced using conventional P/m. The microstructure, and mechanical and wear properties of the composites were evaluated. The microstructure of the composites consisted of （core-rim structure） spherical and semi-spherical TiC particles depending on the wettability of the matrix with TiC particles. In TiC-maraging stainless steel composites, 465 stainless steel binder phase showed good wettability with TiC particles. Some microcracks appeared in the composites, indicating the presence of tensile stresses in the composites produced during sintering. The typical properties, hardness, and bend strength were reported for the composites. After heat treatment and aging, an increase in hardness was observed. The increase in hardness was at- tributed to the aging reaction in maraging stainless steel. The specific wear behavior of the composites strongly depends on the content of TiC particles and their interparticle spacing, and on the heat treatment of the maraging stainless steel.

关键词： TiC-maraging stainless steel composites aging wear powder metallurgy microcracks

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Small-duct primary sclerosing cholangitis with hepatocellular carcinoma requiring liver transplantation

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Hepatobiliary & Pancreatic Diseases International 2010年第2期9卷 208-212页

作者： Sharif ali Veena shah Department of Pathology and Laboratory medicine Henry Ford Health System

BACKGROUND:Primary sclerosing cholangitis(PSC)is a chronic progressive cholestatic liver disease,which usually affects young adults and is diagnosed by *** a few occasions,the disease either starts in or exclusively involves the small intrahepatic bile ducts,referred to as small-duct PSC. mETHODS:A 31-year-old man presented with severe hematemesis secondary to liver *** a course of 8 years,his liver decompensated and required an orthotopic liver transplantation. In this report we discuss his disease presentation,course of management,and the post-transplantation course of manage- ment,and review the morphologic diagnosis,and differential diagnosis of the disease with large-duct type and other diseases that involve small intrahepatic bile ducts. RESULTS:The patient’s explanted liver showed changes of PSC affecting only the small-and medium-sized bile ducts in addition to three incidental nodules of hepatocellular carcinoma. CONCLUSIONS:Small-duct PSC has a substantially better prognosis than the large-duct type,with less chance of developing cirrhosis and an equal risk for developing hepato- cellular carcinoma,but no increased risk for developing *** seems to help relieve the symptoms but not necessarily improve *** transplantation remains the ultimate cure.

关键词： primary sclerosing cholangitis small-duct diseases of the liver hepatocellular carcinoma liver transplantation

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