检索结果-南通市图书馆

Experimental and theoretical investigations on ferromagnetic properties of N-doped ZnO dilute magnetic semiconductors

在线全文

学校读者我要写书评

暂无评论

Experimental and theoretical investigations on ferromagnetic...

Effects of family non-universal Z′model in angular observables of B→(ρ,a_(1))µ^(+)µ^(−)decays

2012中国功能新材料学术论坛暨第三届全国电磁材料及器件学术会议

作者： Hailing Yang,Xiaoguang Xu,* m.hassan farooq,CongJun Ran,YanKai Wang, LiGong Zhou,Jun miao,Yong Jiang State Key Laboratory for Advanced metals and materials,School of materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China.

Nitride-doped ZnO bulk samples were prepared by solid-state reaction method. Structural,magnetic,and optical properties of ZnNOsamples have been studied. The ZnO lattice parameters a and c increase with the increase of the N *** dependence of the lattice constants on N concentration indicates that residual N atoms should be reasonably substituted for 0 atoms in ZnO *** magnetic coercivities of N-doped ZnO samples vary from 60 Oe to 200 Oe,depending on the N concentration,indicating that the films are ferromagnetic at room *** saturation magnetization(m)of the N-doped ZnO films increases remarkably with the N concentration x. Electronic structures of N-doped ZnO were calculated by using the first-principle density-functional theory.A monkhorst-Pack grid with parameters of 3×3×2 was used for irreducible Brillouin zone *** grid of 3×3×2 k points was employed, together with an energy cutoff of 400 eV. Based on the unit cell,3×3×2 supercells of ZnO were constructed,Comparing with the partial DOS of ZnNO,The electronic structure indicates that the energy level splitting is enlarged significantly near the Fermi level for ZnNO-Vsystem. It is may due to the enhancement of coupling between the p orbitals of N and O atoms near the Fermi level.

关键词： ZnO diluted magnetic semiconductor doping

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第10期48卷 86-113页

作者： Nimra farooq marwah Zaki m.Ali Paracha Faisal munir Bhutta Department of Physics School of Natural SciencesNational University of Sciences and TechnologyH-12Islamabad44000Pakistan

We present the angular distribution of the four-fold B→ρ(→ππ)µ^(+)µ^(−) and B→a_(1)(→ρ_(Ⅱ).⊥π)µ^(+)µ^(−) decays in the Standard model and family non-universal Z'*** the quark level,these decays are govered by the b→dµ^(+)µ^(−) *** with different angular observables,we provide predictions of differential branching ***,forward-backward asymmetry,and longitudinal polarization fractions of ρ and a_(1) *** analysis showsthat the signatures of the fimily non-universal Z’model are more distinct in the observables associated with the B→ρ(→ππ)µ^(+)µ^(−) decay than in those associated with the B→a_(1)(→ρ_(Ⅱ).⊥π)µ^(+)µ^(−) *** measurements ofthe predicted angular observables,both at current and fiuture high energy colliders,will provide useful *** data required to clarify the structure of the family non-universal Z' model in |△b|=△d|=1 processes.

关键词： heavy quark physics B meson physics beyond the Standard model

Trauma to the solid abdominal organs:The missed dark box of colonoscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第7期30卷 624-630页

作者： mohamed H Emara Usama mazid Yasmine A Elshaer mahmoud A Elkerdawy Dilaver farooq malik Aya m mahros Department of Hepatology Gastroenterologyand Infectious DiseasesKafrelsheikh UniversityKafr-Elshikh 33516Egypt Department of medicine Alyousif HospitalAlkhobar 31952Saudi Arabia

Colonoscopy is an integral part of the lower bowel care and is generally considered a potentially safe diagnostic and therapeutic procedure performed as a daycare outpatient *** is associated with different complications that are not limited to adverse events related to the bowel preparation solutions used,the sedatives used,but to the procedure related as well including bleeding and *** to the extra-luminal abdominal organs during colonoscopy are uncommon,however,serious complications related to the procedure have been reported infrequently in the *** threatening injuries to the spleen,liver,pancreas,mesentery,and urinary bladder have been reported as early as in *** injuries should not be overlooked by clinicians and *** increasing abdominal pain,abdominal distension,and hemodynamic instability in absence of rectal bleeding should raise the possibility of severe organ *** and hepatic injury following colonoscopy are usually serious and may be life *** conservative management may help,yet they usually need interventional radiology or surgical *** pancreatitis following colonoscopy is usually mild and is mostly managed *** mechanism of abdominal organ injuries during colonoscopy is not fully understood,however many risk factors have been identified,which can be classified as-organ related,procedure related,and local abdominal *** colonoscopy and prior intra-abdominal adhesions are probably the most relevant risk factors for these *** lateral position,avoidance of looping and excessive force during the procedure would probably reduce the risk of such injuries.

关键词： Colonoscopy Pancreatitis Trauma Complications Adhesions

Twinning aspects and their efficient roles in wrought mg alloys:A comprehensive review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of magnesium and Alloys 2024年第6期12卷 2201-2230页

作者： S.S.A.Shah manping Liu Azim Khan farooq Ahmad m.R.Abdullah Xingquan Zhang Shiwei Xu Zhen Peng School of materials Science and Engineering Jiangsu UniversityZhenjiang 212013China School of mechanical Engineering Anhui University of TechnologyMáanshan 243002China College of mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China

Twinning is widely recognized as an effective and cost-efficient method for controlling the microstructure and properties of wrought magnesium(mg)***,twins play a crucial role in initiating dynamic recrystallization(DRX),while twin regions experience rapid recrystallization during static recrystallization(SRX).The activation of twinning can lead to changes in lattice orientation,significantly impacting the final texture in mg *** active roles of twinning are influenced by various factors during the activation process,and the mobility of twin boundaries(TB)can be amplified by stress effects,dislocation interactions,and thermal ***,annealing treatments that involve proper segregation or precipitation on TBs serve to stabilize them,restraining their *** such as segregation may also alter the twinning propensity in magnesium-rare earth(mg-RE)***{10–11}contraction twins(CT)and{10–11}-{10–12}double twins(DT)can promote dynamic recrystallization(DRX),they also pose a risk as potential sources of voids and ***,understanding the nucleation and growth mechanisms of twinning is crucial,and these aspects are briefly reviewed in this *** the factors mentioned above,this article summarizes the recent research progress in this field,shedding light on advancements in recent eras.

关键词： mg alloys Twinning Recrystallization Texture mechanical properties

Vastly Synergistic Fe2CuNiS4-Nanoarchitectures Anchored 2D-Nano-Sandwich Derived from Flower-Like-CuFeS2/N-Graphene and Cube-Like-NiFeS2/N-CNTs for Water Oxidation and Nitrophenol Reduction

在线全文

学校读者我要写书评

暂无评论

ENERGY & ENVIRONmENTAL mATERIALS 2024年第6期7卷 274-289页

作者： mayakrishnan, Gopiraman Vanaraj, Ramkumar Xiong, Junpeng farooq, muhammad Ullah, Azeem Zhang, Keqin Kim, Seong Cheol Kim, Ick Soo Shinshu Univ Inst Fiber Engn IFES Interdisciplinary Cluster Cutting Edge Res ICCER Nano Fus Technol Res GrpDiv Mol & Polymers Tokida 3-15-1 Ueda Nagano 3868567 Japan Yeungnam Univ Sch Chem Engn Gyongsan 38541 South Korea Shinshu Univ Grad Sch Med Sci & Technol Tokida 3-15-1 Ueda Nagano 3868567 Japan Soochow Univ Coll Text & Clothing Engn Natl Engn Lab Modern Silk Suzhou 215123 Peoples R China

Surface area, pore properties, synergistic behavior, homogenous dispersion, and interactions between carbon matrix and metal-nanostructures are the key factors for achieving the better performance of carbon-metal based (electro)catalysts. However, the traditional hydro- or solvothermal preparation of (electro)catalysts, particularly, bi- or tri-metallic nanostructures anchored graphene (G) or carbon nanotubes (CNTs), often pose to poor metal-support interaction, low synergism, and patchy dispersion. At first, bimetallic flower-like-CuFeS2/NG and cube-like-NiFeS2/NCNTs nanocomposites were prepared by solvothermal method. The resultant bimetallic nanocomposites were employed to derive the 2D-nano-sandwiched Fe2CuNiS4/NGCNTs-SW (electro)catalyst by a very simple and green urea-mediated "mix-heat" method. The desired physicochemical properties of Fe2CuNiS4/NGCNTs-SW such as multiple active sites, strong metal-support interaction, homogenous dispersion and enhanced surface area were confirmed by various microscopic and spectroscopic techniques. To the best of our knowledge, this is the first urea-mediated "mix-heat" method for preparing 2D-nano-sandwiched carbon-metal-based (electro)catalysts. The Fe2CuNiS4/NGCNTs-SW was found to be highly effective for alkaline-mediated oxygen evolution reaction at low onset potential of 284.24 mV, and the stable current density of 10 mA cm(-2) in 1.0 m KOH for 10 h. Further, the Fe2CuNiS4/NGCNTs-SW demonstrated excellent catalytic activity in the reduction of 4-nitrophenol with good kapp value of 87.71 x 10(-2) s(-1) and excellent reusability over five cycles. Overall, the developed urea-mediated "mix-heat" method is highly efficient for the preparation of metal-nanoarchitectures anchored 2D-nano-sandwiched (electro)catalysts with high synergism, uniform dispersion and excellent metal-support interaction.

关键词： (electro)catalyst metal-sulfide nanoarchitectures mix-heat N-graphene/N-CNTs synergistic effect urea CELLULOSE NANOFIBER COmPOSITES OXYGEN EVOLUTION TRANSFER HYDROGENATION GRAPHENE CATALYST FACILE ELECTROCATALYST NANOTECHNOLOGY NANOPARTICLES EFFICIENT

Artificial Intelligence Based meteorological Parameter Forecasting for Optimizing Response of Nuclear Emergency Decision Support System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

原子能科学技术 2024年

作者： BILAL Ahmed Khan HASEEB ur Rehman QAISAR Nadeem mUHAmmAD Ahmad Naveed Qureshi JAWARIA Ahad mUHAmmAD Naveed Akhtar AmJAD farooq mASROOR Ahmad Pakistan Institute of Engineering and Applied Sciences

This paper presents a novel artificial intelligence (AI) based approach to predict crucial meteorological parameters such as temperature,pressure,and wind speed,typically calculated from computationally intensive weather research and forecasting (WRF) *** meteorological data is indispensable for simulating the release of radioactive effluents,especially in dispersion modeling for nuclear emergency decision support *** of meteorological conditions during nuclear emergencies using the conventional WRF model is very complex and ***,a new artificial neural network (ANN) based technique was proposed as a viable alternative for meteorological prediction.A multi-input multi-output neural network was trained using historical site-specific meteorological data to forecast the meteorological *** evaluation of this technique was conducted to test its performance in forecasting various parameters including atmospheric pressure,temperature,and wind speed components in both East-West and North-South *** performance of developed network was evaluated on an unknown dataset,and acquired results are within the acceptable range for all meteorological *** show that ANNs possess the capability to forecast meteorological parameters,such as temperature and pressure,at multiple spatial locations within a grid with high accuracy,utilizing input data from a single ***,accuracy is slightly compromised when predicting wind speed *** mean square error (RmSE) was utilized to report the accuracy of predicted results,with values of 1.453℃for temperature,77 Pa for predicted pressure,1.058 m/s for the wind speed of U-component and 0.959 m/s for the wind speed of *** conclusion,this approach offers a precise,efficient,and wellinformed method for administrative decision-making during nuclear emergencies.

关键词：

metabolic syndrome and the urinary microbiome of patients undergoing percutaneous nephrolithotomy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Urology 2024年第2期11卷 316-323页

作者： Ryan A.Dornbier Chirag P.Doshi Shalin C.Desai Petar Bajic michelle Van Kuiken mark Khemmani Ahmer V.farooq Larissa Bresler Thomas m.T.Turk Alan J.Wolfe Kristin G.Baldea Loyola University medical Center Department of UrologyMaywoodILUSA Loyola University Chicago Department of Microbiology and ImmunologyMaywoodILUSA

Objective:To identify possible stone-promoting microbes,we compared the profiles of microbes grown from stones of patients with and without metabolic syndrome(metS).The association between metS and urinary stone disease is well established,but the exact pathophysiologic relationship remains *** evidence suggests urinary tract dysbiosis may lead to increased nephrolithiasis ***:At the time of percutaneous nephrolithotomy,bladder urine and stone fragments were collected from patients with and without *** sample types were subjected to expanded quantitative urine culture(EQUC)and 16 S ribosomal RNA gene ***:Fifty-seven patients included 12 controls(21.1%)and 45 metS patients(78.9%).Both cohorts were similar with respect to demographics and non-metS *** controls had uric acid stone *** EQUC,bacteria were detected more frequently in metS stones(42.2%)compared to controls(8.3%)(p=0.041).Bacteria also were more abundant in stones of metS patients compared to *** validate our EQUC results,we performed 16 S ribosomal RNA gene *** 12/16(75.0%)sequence-positive stones,EQUC reliably isolated at least one species of the sequenced *** were detected in both“infectious”and“non-infectious”stone ***:Bacteria are more common and more abundant in metS stones than control *** findings support a role for bacteria in urinary stone disease for patients with metS regardless of stone composition.

关键词： Nephrolithiasis Urolithiasis metabolic syndrome Urinary microbiome Percutaneous nephrolithotomy

management of needle blight (Lophodermium pinastri) disease in Blue pine trees in Kashmir,India

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2016年第1期27卷 185-192页

作者： farooq A.Ahanger Gh.hassan Dar m.A.Beig T.A.Sofi Division of Plant Pathology Sher-e-Kashmir University of Agricultural Sciences & Technology of Kashmir

Evaluation of various fungicides against needle blight disease of pine was carried out at Shed Kashmir University of Agriculture Sciences and Technology of Kashmir （India） during the year 2008 and 2009. Applica- tion of various fungicides were evaluated in vivo at dif- ferent concentrations. However in both, mist-chamber and poly-chamber, the Blue pine （Pinus wallichiana Jackson） seedlings treated with hexaconazole 5EC （@ 0.03 %） or carbendazim 50WP （@ 0.1%） depicted significantly less disease incidence and intensity. The seedlings treated with mancozeb 75WP （@ 0.3 %） and chlorothalonil 75WP （@ 0.3 %） exhibited less disease incidence and intensity. Increase in relative humidity from 60 to 100 % signifi- cantly enhanced needle blight disease incidence and intensity. In field trial the fungitoxicants used either as single spray or protectant followed by systemic fungitoxi- cant spray significantly reduced disease incidence in Blue pine compared to check. The mean disease incidence in fungitoxicant treated plants varied from 11.82 to 25.51% as compared to 36.03 % in control.

关键词： Needle blight disease Fungicides - Bluepine Lophodermium pinastri

Implementation of a new PC based controller for a PUmA robot

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第12期8卷 1962-1970页

作者： farooq m. College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016 China

This paper describes the replacement of a controller for a programmable universal machine for assembly (PUmA) 512 robot with a newly designed PC based (open architecture) controller employing a real-time direct control of six joints. The original structure of the PUmA robot is retained. The hardware of the new controller includes such in-house designed parts as pulse width modulation (PWm) amplifiers, digital and analog controllers, I/O cards, signal conditioner cards, and 16-bit A/D and D/A boards. An Intel Pentium IV industrial computer is used as the central controller. The control software is implemented using VC++ programming language. The trajectory tracking performance of all six joints is tested at varying velocities. Experimental results show that it is feasible to implement the suggested open architecture platform for PUmA 500 series robots through the software routines running on a PC. By assembling controller from off-the-shell hardware and software components, the benefits of reduced and improved robustness have been realized.

关键词： Programmable universal machine for assembly (PUmA) robot Computed torque control (CTC) Pulse width modulation (PWm) amplifier Graphical user interface (GUI)