检索结果-南通市图书馆

Development,Capitalism Transformation and Marxism

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

学术界 2019年第2期 185-192页

作者： mustapha Machrafi Faculty of Law Economics and Social Science Mohammed V University

Development,Capitalism Transformation and

关键词： capitalism Marxism sub-Saharan Africa political economy paradigm shift

Quantum-classical correspondence for the inverted oscillator

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2017年第11期41卷 56-62页

作者： mustapha Maamache Jeong Ryeol Choi Laboratoire de Physique Quantique et Systèmes Dynamiques Faculté des SciencesUniversité Ferhat Abbas Sétif 1 Sétif 19000 Department of Radiologic Technology Daegu Health College

While quantum-classical correspondence for a system is a very fundamental problem in modern physics,the understanding of its mechanism is often elusive,so the methods used and the results of detailed theoretical analysis have been accompanied by active *** this study,the differences and similarities between quantum and classical behavior for an inverted oscillator have been analyzed based on the description of a complete generalized Airy function-type quantum wave *** inverted oscillator model plays an important role in several branches of cosmology and particle *** quantum wave packet of the system is composed of many sub-packets that are localized at different positions with regular intervals between *** is shown from illustrations of the probability density that,although the quantum trajectory of the wave propagation is somewhat different from the corresponding classical one,the difference becomes relatively small when the classical excitation is sufficiently *** have confirmed that a quantum wave packet moving along a positive or negative direction accelerates over time like a classical *** these main interpretations and others in the text,we conclude that our theory exquisitely illustrates quantum and classical correspondence for the system,which is a crucial concept in quantum mechanics.

关键词： quantum-classical correspondence inverted oscillator quantum wave packet

Substructure design optimization and nonlinear responses control analysis of the mega-sub controlled structural system (MSCSS) under earthquake action

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2021年第3期20卷 687-704页

作者： mustapha Abdulhadi Zhang Xun′an Buqiao Fan Muhammad Moman College of Mechanics and Civil Engineering Northwestern Polytechnic UniversityXi’an 710071China

The newly proposed mega sub-controlled structure system(MSCSS)and related studies have drawn the attention of civil engineers for practice in improving the performance and enhancing the structural effectiveness of mega frame ***,there is still a need for improvement to its basic structural *** this project,an advanced,reasonable arrangement of mega sub-controlled structure models,composed of three mega stories with different numbers and arrangements of substructures,are designed to investigate the control performance of the models and obtain the optimal model configuration(model with minimum acceleration and displacement responses)under strong earthquake *** addition,the dynamic parameters that affect the performance effectiveness of the optimal model of MSCSS are studied and *** area of the relative stiffness ratio RD,with different mass ratio MR,within which the acceleration and displacement of the optimal model of MSCSS reaches its optimum(minimum)value is considered as an optimum *** serves as a useful tool in practical engineering *** study demonstrates that the proposed MSCSS configuration can efficiently control the displacement and acceleration of high rise *** addition,some analytical guidelines are provided for selecting the control parameters of the structure.

关键词： mega sub-controlled structure system(MSCSS) optimal model viscous damper dynamic parameters control effectiveness response control rubber bearing

Gyroscope precession frequency analysis of a five-dimensional charged rotating Kaluza-Klein black hole

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2020年第6期44卷 143-153页

作者： mustapha Azreg-Aïnou Mubasher Jamil Kai Lin Engineering Faculty Başkent UniversityBağlıca CampusAnkaraTurkey Institute for Theoretical Physics and Cosmology Zhejiang University of TechnologyHangzhou 310023China School of Natural Sciences National University of Sciences and TechnologyH-12Islamabad 44000Pakistan Institute of Geophysics and Geomatics China University of GeosciencesWuhan 430074China

We study the spin precession frequency of a test gyroscope attached to a stationary observer in the five-dimensional rotating Kaluza-Klein black hole(RKKBH). We derive the conditions under which the test gyroscope moves along a timelike trajectory in this geometry, and the regions where the spin precession frequency diverges. The magnitude of the gyroscope precession frequency around the KK black hole diverges at two spatial locations outside the event horizon. However, in the static case, the behavior of the Lense-Thirring frequency of a gyroscope around the KK black hole is similar to the ordinary Schwarzschild black hole. Since a rotating Kaluza-Klein black hole is a generalization of the Kerr-Newman black hole, we present two mass-independent schemes to distinguish these two spacetimes.

关键词： rotating black hole Kaluza-Klein spin precession gyroscope

South Carolina forestland owners’ willingness to accept compensations for carbon sequestration

在线全文

学校读者我要写书评

暂无评论

Forest Ecosystems 2019年第2期6卷 119-131页

作者： mustapha Alhassan Marzieh Motallebi Bo Song Clemson University Baruch Institute of Coastal Ecology and Forest Science P. O. Box 596 Georgetown SC 29442 USA U.S. Geological Survey Science and Decisions Center 12201 Sunrise Valley Drive Mail Stop 913 Reston VA 20192 USA

Background: Carbon sequestration through recommended forest management practices is an ecosystem service that helps mitigate climate change and its impacts while generating carbon credits for forestland owners to sell in cap-and-trade programs. The California’s cap-and-trade program (California’s carbon market hereafter) allows forestland owners from any part of the contiguous United States to supply carbon credits to compliance entities. In this study, we estimate South Carolina (SC) private forestland owners’willingness to accept compensations to participate in the California’s carbon market using a contingent valuation method. Results: We estimate forestland owners’mean willingness to accept as$67 per acre per year. Our results reveal higher probability of participation of forestland owners with interests in preserving forest ecosystems than those who do not. Additionally, forestland owners who trust in information about climate change from scientists or government are willing to participate more than those who do not. Conclusions: Various factors hinder landowners’ability to participate in carbon markets. Forestland owners in SC consider legislative uncertainty and long-time commitment as the main barriers to participation in California’s carbon market. From this research, average forestland tenure in SC is 27 years, which is far less than the 100-year time commitment of the California’s carbon market. Of those who agreed to participate, choosing between adopting and not adopting any of the three main forest management practices in the California’s carbon market:28% are likely to adopt improved forest management (IFM) practices, 24% are likely to adopt reforestation due to understocked forestlands, and 14% are likely to adopt avoided conversion. In another development, the concept of aggregation has dominated discussions in the California’s carbon market of late. It is an advocacy to include small-scale forestlands in the California’s carbon market. To aggregate

关键词： Forestland owners Carbon markets Willingness to accept

Seismic design factors for RC special moment resisting frames in Dubai,UAE

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2011年第4期10卷 495-506页

作者： Mohammad AlHamaydeh Sulayman Abdullah Ahmed Hamid Abdilwahhab mustapha Department of Civil Engineering American University of Sharjah

This study investigates the seismic design factors for three reinforced concrete （RC） framed buildings with 4, 16 and 32-stories in Dubai, UAE utilizing nonlinear analysis. The buildings are designed according to the response spectrum procedure defined in the 2009 International Building Code （IBC＇09）. Two ensembles of ground motion records with 10% and 2% probability of exceedance in 50 years （10/50 and 2/50, respectively） are used. The nonlinear dynamic resPonses to the earthquake records are computed using IDARC-2D. Key seismic design parameters are evaluated; namely, response modification factor （R）, deflection amplification factor （Cd）, system overstrength factor （Ωo）, and response modification factor for ductility （Rd） in addition to inelastic interstory drift. The evaluated seismic design factors are found to significantly depend on the considered ground motion （10/50 versus 2/50）. Consequently, resolution to the controversy of Dubai seismicity is urged. The seismic design factors for the 2/50 records show an increase over their counterparts for the 10/50 records in the range of 200%-400%, except for the D~ factor, which shows a mere 30% increase. Based on the observed trends, perioddependent R and Cd factors are recommended if consistent collapse probability （or collapse prevention performance） in moment frames with varying heights is to be expected.

关键词： Seismic design factors reinforced concrete special moment resisting frame Dubai UAE

Thermal Analysis of a Phase Change Material Based Heat Sink for Cooling Protruding Electronic Chips

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2009年第3期18卷 268-275页

作者： mustapha FARAJI Hamid EL QARNIA EI Khadir LAKHAL Fluids Mechanic and Energetic Laboratory Automatic Environment and Transfer Process Laboratory Cadi Ayyad University Faculty of Sciences Semlalia Department of Physics

This work aims to numerically study the melting natural convection in a rectangular enclosure heated by three discreet protruding electronic chips. The beat sources generate heat at a constant and uniform volumetric rate. A part of the power generated in the heat sources is dissipated to a phase change material （PCM, n-eicosane with melting temperature, Tm = 36℃）. Numerical investigations were carded out in order to examine the effects of the plate thickness on the maximum temperature of electronic components, the percentage contribution of plate heat conduction on the total removed heat and temperature profiles in the plate. Con＇elations for the dimensionless secured working time （time to reach the threshold temperature, Tcr = 75℃） and the corresponding liquid fraction were derived.

关键词： Phase change material protruding electronic component natural convection

Hepatic fibrosis： It is time to go with hepatic stellate cell-specifictherapeutic targets

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2018年第3期17卷 192-197页

作者： Devaraj Ezhilarasan Etienne Sokal mustapha Najimi Biomedical Research Unit and Laboratory Animal Centre Saveetha Dental College and HospitalsSaveetha Institute of Medical and Technical SciencesChennai 600 077Tamil NaduIndia Institut de Recherche Expérimentale et Clinique(IREC) Laboratory of Pediatric Hepatology and Cell TherapyUniversité Catholique de LouvainBrussels 1200Belgium

Hepatic fibrosis is a pathological lesion, characterized by the progressive accumulation of extracellularmatrix （ECM） in the perisinusoidal space and it is a major problem in chronic liver diseases. Phenotypicactivation of hepatic stellate cells （HSC） plays a central role in the progression of hepatic fibrosis. Retardation of proliferation and clearance of activated HSCs from the injured liver is an appropriate therapeuticstrategy for the resolution and treatment of hepatic fibrosis. Clearance of activated HSCs from the injuredliver by autophagy inhibitors, proapoptotic agents and senescence inducers with the high affinity towardthe activated HSCs may be the novel therapeutic strategy for the treatment of hepatic fibrosis in the nearfuture.

关键词： Hepatic stellate cells Apoptosis Autophagy Senescence Extracellular matrix

Nonlinear description of Yang-Mills cosmology： cosmic inflation and the accompanying Hannay's angle

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2017年第6期41卷 115-121页

作者： Yacine Bouguerra mustapha Maamache Jeong Ryeol Choi Laboratoire de Physique Quantique et Systèmes Dynamiques Faculté des SciencesUniversite Ferhat Abbas Setif 1 Setif 19000 Algeria Département de Physique Facultédes Sciences Université de Jijel BP 98Ouled Aissa Jijel 18000 Algeria Department of Radiologic Technology Daegu Health College Yeongsong-ro 15 Buk-gu Daegu 41453 Republic of Korea

Hannay＇s angle is a classical analogue of the ＂geometrical phase factor＂ found by Berry in his research on the quantum adiabatic theorem. This classical analogue is defined if closed curves of constant action variables return to the same curves in phase space after an adaibatic evolution. Adiabatic evolution of Yang-Mills cosmology, which is described by a time-dependent quartic oscillator, is investigated. Phase properties of the Yang-Mills fields are analyzed and the corresponding Hannay＇s angle is derived from a rigorous evaluation. The obtained Hannay＇s angle shift is represented in terms of several observable parameters associated with such an angle shift. The time evolution of Hannay＇s angle in Yang-Mills cosmology is examined from an illustration plotted on the basis of numerical evaluation,and its physical nature is addressed. Hannay＇s angle, together with its quantum counterpart Berry＇s phase, plays a pivotal role in conceptual understanding of several cosmological problems and indeed can be used as a supplementary probe for cosmic inflation.

关键词： Yang-Mills cosmology Hannay angle time-dependent quartic Hamiltnian inflation