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CES Transactions on Electrical machines and Systems 2023年第4期7卷 422-429页

作者： A.infantraj m.Augustine E.Fantin irudaya Raj m.Appadurai Department of Electrical&Electronics Engineering Loyola-ICAM College of Engineering&TechnologyChennaiTamil NaduIndia Department of Electrical and Electronics Engineering Dr.Sivanthi Aditanar College of EngineeringTiruchendurTamil NaduIndia Department of mechanical Engineering Nehru College of Engineering and Research CentreThrissurKeralaIndia

Permanent magnet brushless DC motors are used for various low-power applications,namely domestic fans,washing machines,mixer grinders and cooling fan *** paper focuses on selecting the best laminating material for the interior permanent magnet brushless DC(iPm BLDC)motor used in the cooling fan of *** laminating materials,namely m19-29GA,m800-65A and m43,are tested using finite element *** machine's vital performance metrics,namely the stator current,torque ripple,and hysteresis loss were analyzed in selecting the laminating *** designed motor is also modelled as a mathematical model from the computed lumped *** performance of the machines was validated through electromagnetic and thermal analysis.

关键词： Finite Element Analysis iPm BLDC Laminating material m19-29GA m800-65A m43

inelastic Cotunneling Current and Shot Noise of an interacting Quantum Dot with Ferromagnetic Correlations

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Communications in Theoretical Physics 2007年第12期48卷 1099-1106页

作者： Norman J.m.Horing Department of Physics and Engineering Physics Stevens Institute of TechnologyHobokenNew Jersey 07030USA

We explore inelastic cotunneling through a strongly Coulomb-blockaded quantum dot attached to twoferromagnetic leads in the weak coupling limit using a generic quantum Langevin equation *** first developa B1och-type equation microscopically to describe the cotunneling-induced spin relaxation dynamics,and then developexplicit analytical expressions for the local magnetization,current,and its *** this basis,we predict a novelzero-bias anomaly of the differential conductance in the absence of a magnetic field for the anti-parallel configuration,and asymmetric peak splitting in a magnetic ***,for the same system with large polarization,we find a negativezero-frequency differential shot noise in the low positive bias-voltage region. All these effects are ascribed to rapidspin-reversal due to underlying spin-flip cotunneling.

关键词： quantum dot spin polarized tunneling cotunneling

High-Spin States in the N = 50 Nucleus ^(88)Sr

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Chinese Physics Letters 2001年第7期18卷 894-896页

作者： LiU Zhong T.ishii T.Hayakawa m.Oshima Y.Toh H.Sakurai m.Notani m.ishihara institute of modern Physics Chinese Academy of SciencesLanzhou 730000 Japan Atomic Energy Research institute TokaiIbaraki 319-1195Japan The institute of Physical and Chemical Research WakoSaitama 351-0198Japan

The Excited states of ^(88)Sr have been produced in the reaction ^(16)O(^(82)Se,4p6n)and studied using the in-beam γ spectroscopy *** high-spin level structures have been observed and established up to 8.5 meV and 7.9 meV excitation energy,*** on the measurements of the directional correlations ofγ-rays de-exciting oriented states and anisotropic factors ofγ-rays,spin values of the excited states have been assigned up to the highest levels observed.

关键词： states excited excitation

匈牙利、波兰和俄罗斯职工收购中的公司治理和资本问题

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经济社会体制比较 1997年第3期 30-36页

作者：Ｉ·费拉多切夫,Ｉ·格罗斯费尔德,Ｊ·卡赛,Ｍ·莱特,Ｔ·巴克

匈牙利、波兰和俄罗斯职工收购中的公司治理和资本问题Ｉ·费拉多切夫Ｉ·格罗斯费尔德Ｊ·卡赛Ｍ·莱特Ｔ·巴克中东欧正在通过多种机制实施广泛的私有化，但职工收购（ｂｕｙ－ｏｕｔｓ）方式的相对重要性在各国有所不同。俄罗斯私有... 详细信息

匈牙利、波兰和俄罗斯职工收购中的公司治理和资本问题Ｉ·费拉多切夫Ｉ·格罗斯费尔德Ｊ·卡赛Ｍ·莱特Ｔ·巴克中东欧正在通过多种机制实施广泛的私有化，但职工收购（ｂｕｙ－ｏｕｔｓ）方式的相对重要性在各国有所不同。俄罗斯私有化主要是职工收购，而在匈牙利和波兰...

关键词：资本工人工资劳动者企业管理企业法人治理结构公司治理结构投资者俄罗斯匈牙利炒股贸易股票交易所有权结构就业规模就业量波兰

Assessing conservation practices in Amalacaxco Gorge (izta-Popo National Park, Central mexico) using fallout 137Cs and Optically Stimulated Luminescence (OSL)

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Journal of mountain Science 2018年第3期15卷 447-460页

作者： mUNOZ-SALiNAS E CASTiLLO m Departamento de Geología Regional Universidad Nacional Autónoma de México Ciudad UniversitariaCiudad de MexicoMexico Laboratorio Nacional de Geoquimicay mineralogia Ciudad Universitaria Ciudad de Mexico Mexico

This study aims to assess conservation practices in izta-Popo National Park(Central mexico) by evaluating the mechanisms of sediment transfer. We applied a methodology based on fallout ^(137)Cs and optically stimulated luminescence(OSL) analysis. This was tested in the upper catchment of Amalacaxco Gorge, selected for being one of the sectors of the park in which man-made actions have been implemented in last decades to favor forest growth in the alpine grassland and to reduce the effect of water runoff. We quantified the ^(137)Cs activity using gamma and beta spectrometry of fine sediment grains extracted from the surface of parcels of 0.4 m2 in areas of natural forest, natural alpine grassland, alpine grassland with conservation practices, ravines and trails. in general, ^(137)Cs values increases as local slope decreases as it was expected. The natural forest is the most stable area in terms of soil erosion and sediment accumulation and, mean ^(137)Cs activity was taken as reference to assess cumulative zones, with higher ^(137)Cs values and erosive, with lower. We found that trails are accumulative surfaces but in other areas, erosion predominates. man-made ditches, trenches and afforestation in the alpine grassland have higher ^(137)Cs values than thenatural grassland, which indicates that conservation practices are limiting the sediment transfer from hillslopes to channels, however, soil retention is less than in the natural grassland. Additionally, we evaluated the luminescence(OSL) values obtained from samples extracted from the sediment transported in ravines that are cutting into different sectors of the study area to assess the grade of resetting of fluvial materials. These luminescence results indicated that the sediment transported in ravines that are cutting into the natural forest and alpine grassland is bleached more efficiently than the sediment transported in the alpine grassland with conservation practices. Results of fallout ^(137)Cs and luminesce

关键词： Sediment transfer Soil erosion Natural protected areas Alpine grassland Caesium-137 Optically stimulated luminescence

Operative or interventional Treatment in infrainguinal Bypass Occlusion:Are There Predictive Factors Affecting Outcome?

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Surgical Science 2012年第10期3卷 473-478页

作者： T.Betz C.Uhl m.Steinbauer N.Zorger i.Topel Department of Vascular Surgery Krankenhaus Barmherzige Brüder RegensburgRegensburgGermany Department of Radiology Krankenhaus Barmherzige Brüder RegensburgRegensburgGermany

Purpose: To evaluate outcome of interventional and surcigal treatment in infrainguinal bypass occlusion and to identify predictive factors affecting therapeutic success. material and methods: Over a period of three years 96 patients with infrainguinal bypass occlusion were included in this retrospective study. 52 patients were treated by catheter-directed thrombolysis and 44 patients by reconstructive vascular surgery. Results: 41 grafts could be reopened in thrombolytic group (78.8%), thrombolysis failed in 11 cases (21.2%). 34 grafts were treated successfully by reconstructive vascular surgery (77.3%), 10 grafts couldn’t be reopened or reoccluded within 30 days after surcical therapy. After a median observation time of 14.7 months 30 of 48 (62.5%) bypass grafts treated with intraarterial thrombolysis and 19 of 27 (70.4%) grafts treated with thrombectomy were overall patent. Limb salvage was 81.3% in thrombolytic group and 88.8% in surgery group. No predictive factors affecting outcome could be identified in both groups except the localization of the occluded graft (above/below knee). Conclusion: infrainguinal bypass occlusion is a serious and challenging complication in vascular surgery. Our study showed similar results for both therapeutic strategies. Despite our data was retrospective with a small number of patients the localization of the occluded graft as predictive pretherapeutic factor was significant in thrombolytic and surgery group. Based on these scientific findings we established a guideline for choice of therapeutic treatment in our institution after searching current literature.

关键词： Thrombolytic Therapy Bypass occlusion Percutaneous intervention Bypass Thrombectomy

Synthesis of new 1,2,4-oxadiazolidin-5-ylthiophenes and thienopyrimidine derivatives by aza-Wittig reaction using a thienyl carbodiimide

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Chinese Chemical Letters 2012年第4期23卷 411-414页

作者： Afaf m.Abdel Hameed Chemistry Department Faculty of ScienceMinia University

Azidation of aminothiophene derivative 1 afforded the corresponding azido derivative *** latter reacted with triphenylphosphine to afford iminophosphorane derivatives *** 3 with phenylisocyanate gave the highly reactive carbodiimide intermediate 4,which was reacted with different nitrones to afford new l,2,4-oxadiazolidin-5-ylidene-aminothiophenes 5a-c. Treatment of 4 with absolute EtOH at room temperature gave methyleneamino-5-（methylthio）thiophene 7,（methylthio）-3-（3- phenylureidothiophene）-2-carboxylate 8 or thienopyrimidine 9 and 10 at refluxing *** reaction of carbodiimide intermediate 4 with different secondary amines gave the new thienopyrimidines 11a-c.

关键词： Carbodiimide Cycloaddition 1 2 4-Oxadiazolidin-5-ylideneaminothiophene derivatives Thienopynmidine Aza-Wittig reaction

Combined administration of platelet rich plasma and autologous bone marrow aspirate concentrate for spinal cord injury: a descriptive case series

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Neural Regeneration Research 2021年第2期16卷 362-366页

作者： Joseph A.Shehadi Steven m.Elzein Paul Beery m.Chance Spalding michelle Pershing Section of Neurosurgery at OhioHealth Grant medical Center Cedar Stem Cell InstituteColumbusOHUSA The Ohio State University College of medicine ColumbusOHUSA Division of Trauma and Acute Care Surgery OhioHealth Grant Medical CenterColumbusOHUSA OhioHealth Research institute ColumbusOHUSA

Administration of platelet rich plasma(PRP) and bone marrow aspirate concentrate(BmAC) has shown some promise in the treatment of neurological conditions;however, there is limited information on combined administration. As such, the purpose of this study was to assess safety and functional outcomes for patients administered combined autologous PRP and BmAC for spinal cord injury(SCi). This retrospective case series included seven patients who received combined treatment of autologous PRP and BmAC via intravenous and intrathecal administration as salvage therapy for SCi. Patients were reviewed for adverse reactions and clinical outcomes using the Oswestry Disability index(ODi) for up to 1 year, as permitted by availability of follow-up data. injury levels ranged from C3 through T11, and elapsed time between injury and salvage therapy ranged from 2.4 months to 6.2 years. Post-procedure complications were mild and rare, consisting only of self-limited headache and subjective memory impairment in one patient. Four patients experienced severe disability prior to PRP combined with BmAC injection, as evidenced by high(> 48/100) Oswestry Disability index scores. Longitudinal Oswestry Disability index scores for two patients with incomplete SCi at C6 and C7, both of whom had cervical spine injuries, demonstrated a decrease of 28–40% following salvage therapy, representing an improvement from severe to minimal disability. in conclusion, intrathecal/intravenous co-administration of PRP and BmAC resulted in no significant complications and may have had some clinical benefits. Larger clinical studies are needed to further test this method of treatment for patients with SCi who otherwise have limited meaningful treatment options. This study was reviewed and approved by the Ohio Health institutional Review Board(iRB No. 1204946) on may 16, 2018.

关键词： bone marrow aspirate concentrate cell-based therapy neural regeneration Oswestry Disability index platelet rich plasma spinal cord injury stem cells

impact of carbon paper structural parameters on the performance of a polymer electrolyte fuel cell cathode via lattice Boltzmann method

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Acta mechanica Sinica 2020年第2期36卷 367-380页

作者： m.Nazemian G.R.molaeimanesh Research Laboratory of Automotive Fluids and Structures Analysis Automotive Engineering SchoolIran University of Science and TechnologyTehran 16846-13114Iran

Polymer electrolyte fuel cells(PEFCs)being employed in fuel cell electric vehicles(FCEVs)are promising power generators producing electric power from fuel stream via porous *** of carbon paper gas diffusion layers(GDLs)applying in the porous electrodes can greatly affect the PEFC performance,especially at the cathode side where electrochemical reaction is more *** discover the role of carbon paper GDL structure on the mass transfer properties,different cathode electrodes with dissimilar structural parameters are simulated via lattice Boltzmann method(LBm).3D contours of oxygen and water vapor concentration through the GDL as well as the 2D contours of current density on the catalyst layer are illustrated and *** results indicate that the carbon fiber diameter has a negligible impact on the current density while the impact of carbon paper thickness and porosity is *** fact,increasing of carbon paper thickness or porosity leads to lack of cell performance.

关键词： Polymer electrolyte fuel cell(PEFC) Lattice Boltzmann method(LBm) microstructure reconstruction Carbon paper mass transfer properties

A comprehensive investigation of loading variance influence on fuel consumption and gas emissions in mine haulage operation

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international Journal of mining Science and Technology 2016年第6期26卷 995-1001页

作者： Soofastaei A. Aminossadati S.m. Kizil m.S. Knights P. School of mechanical and mining Engineering University of Queensland

The data collected from haul truck payload management systems at various surface mines show that the payload variance is significant and must be considered in analysing the mine productivity, diesel energy consumption, greenhouse gas emissions and associated costs. The aim of this study is to determine the energy and cost saving opportunities for truck haulage operations associated with the payload variance in surface mines. The results indicate that there is a non-linear relationship between the payload variance and the fuel consumption, greenhouse gas emissions and associated costs. A correlation model, which is independent of haul road conditions, has been developed between the payload variance and the cost saving using the data from an Australian surface coal mine. The results of analysis for this particular mine show that a significant saving of fuel and greenhouse gas emissions costs is possible if the standard deviation of payload is reduced from the maximum to minimum value.

关键词： Energy consumption Haul truck Surface mine Greenhouse gas emissions Cost