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石油物探译丛 1998年第5期 25-33页

作者： Evgeny landa 高林中国新星石油公司石油物探研究所

引言断层和断裂带的检测与识别是地震数据解释中最重要的问题之一。传统的方法以肉眼观察叠加剖面上的反射层间断为基础。这种方法在解释人员用丰富的地质知识约束下很奏效,但会导致方法的效果对解释人员的经验和对先验地质信息的依赖... 详细信息

引言断层和断裂带的检测与识别是地震数据解释中最重要的问题之一。传统的方法以肉眼观察叠加剖面上的反射层间断为基础。这种方法在解释人员用丰富的地质知识约束下很奏效,但会导致方法的效果对解释人员的经验和对先验地质信息的依赖性太强。对小幅度断层。

关键词：地震勘探数据解释断层检测工具干涉图

Evaluation of FEMA-440 for including soil-structure interaction

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Earthquake Engineering and Engineering Vibration 2010年第3期9卷 397-408页

作者： Khoshnoudian F. Behmanesh i. Faculty of Civil Engineering Amirkabir University of Technology Faculty of Civil and Environmental Engineering Tufts University

Replacing the entire soil-structure system with a fixed base oscillator to consider the effect of soil-structure interaction （SSi） is a common analysis method in seismic design. This technique has been included in design procedures such as NEHRP, ASCE, etc. by defining an equivalent fundamental period and damping ratio that can modify the response of the structure. However, recent studies indicate that the effects of SSi should be reconsidered when a structure undergoes a nonlinear displacement demand. in recent documents on Nonlinear Static Procedures （NSPs）, FEMA-440 （2005）, a modified damping ratio of the replacement oscillator was proposed by introducing the ductility of the soil-structure system obtained from pushover analysis. in this paper, the damping defined in FEMA-440 to include the soil-structure interaction effect is evaluated, and the accuracy of the Coefficient Method given in FEMA-440 and the Equivalent Linearization Method is studied. Although the improvements for Nonlinear Static Procedures （NSPs） in FEMA-440 are achieved for a fixed base SDOF structure, the soil effects are not perfectly obtained. Furthermore, the damping definition of a soil-structure system is extended to structures to consider bilinear behavior.

关键词： soil-structure interaction foundation damping inelastic behavior equivalent linearization

Collapse period of degrading SDOF systems

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Earthquake Engineering and Engineering Vibration 2014年第4期13卷 681-694页

作者： Borekci M Kircil MS Ekiz i Yildiz Technical University

Seismic demand estimation for a structure is a critical issue for seismic performance assessment so that the potential damage can be estimated realistically. Many researchers proposed simplified methods to estimate the demand of a structure under strong ground motions. However, most of them did not consider degradation and collapse potential of the structures. Even some of theme considered the degradation effect, stiffness and strength degradation effects were considered separately without collapse potential caused by dynamic instability. in this study, collapse potential of SDOF systems caused by dynamic instability with stiffness and strength degradation has been investigated. Nonlinear time history analyses were performed, using an energy-based, strength and stiffness degraded hysteretic model that considers the collapse potential, with 160 earthquake acceleration time histories. An equation was proposed for the estimation of collapse period of SDOF systems as a function of certain strength reduction factor, ductility level and post-capping stiffness ratio. Finally, effects of parameters of the considered hysteretic model and local site conditions on the collapse period were investigated.

关键词： collapse degradation dynamic instability hysteretic types,earthquake

APPLYiNG PARTiCLE SWARM OPTiMiZATiON AND HONEY BEE MATiNG OPTiMiZATiON iN DEVELOPiNG AN iNTELLiGENT MARKET SEGMENTATiON SYSTEM

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Journal of Systems Science and Systems Engineering 2010年第2期19卷 182-191页

作者： Chui-Yu CHiU i-Ting KUO Department of industrial Engineering and Management National Taipei University of Technology

Data mining has been successfully applied in many fields to find useful information stored in vast databases. Market segmentation, which segments data into homogenous clusters by using cluster analysis, is among the most important of the applications in data mining. in this study, we propose a clustering system which integrates particle swarm optimization and honey bee mating optimization methods （PSHBMO）. Simulations for a benchmark test function show that our proposed method is better equipped to find the global optimum than other well-known clustering algorithms. Finally, the proposed clustering system is applied to a real-world consumer electronic company to perform market segmentation via the RFM model.

关键词： Market segmentation particle swarm optimization honey bee mating optimization

Electron transport in electrically biased inverse parabolic double-barrier structure

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Chinese Physics B 2016年第5期25卷 326-332页

作者： M Bati S Sakiroglu i Sokmen Physics Department Faculty of Science Dokuz Eylül University Physics Department Graduate School of Natural and Applied Sciences Dokuz Eylül University Physics Department Faculty of Arts and Sciences Recep Tayyip Erdogan University

A theoretical study of resonant tunneling is carried out for an inverse parabolic double-barrier structure subjected to an external electric field. Tunneling transmission coefficient and density of states are analyzed by using the non-equilibrium Green＇s function approach based on the finite difference method. it is found that the resonant peak of the transmission coefficient, being unity for a symmetrical case, reduces under the applied electric field and depends strongly on the variation of the structure parameters.

关键词： inverse parabolic double-barrier structure resonant tunneling non-equilibrium Green's function electric field

PHASE EQUiLiBRiUM OF COMPLEX MiXTURES WiTH EQUATiONS OF STATE: AN UPDATE5

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Chinese Journal of Chemical Engineering 1995年第1期3卷 42-53页

作者： Stanley i.Sandler Hasan orbey Center for Molecular and Engineering Thermodynamics Department of Chemical EngineeringUniversity of DelawareNewarkDE 19716 USACenter for Molecular and Engineering ThermodynamicsDepartment of Chemical EngineeringUniversity of DelawareNewarkDE 19716 USA

Here we review a new class of mixing rules (hat have extended range of mixtures and conditions that can now be described by equation of state models. One characteristic of these mixing rules is that they simultaneously satisfy the boundary conditions of producing a second virial coefficient that is quadratic in mole fraction, and a free energy of mixing like that of an activity coefficient model at high density, though the mixing rule is itself independent of density. We show that using this mixing rule, various asymmetric, highly nonideal mixtures can be accurately described. One serendipitous result is that the parameters in this mixing rule model are almost independent of temperature, which allows accurate extrapolations of phase behavior to be made over large ranges of temperature and pressure.

关键词： equations of state mixing rules phase equilibrium complex mixtures

Biodegradation of p-cresol by aerobic granules in sequencing batch reactor

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Journal of Environmental Sciences 2012年第11期24卷 2012-2027页

作者： Farrukh Basheer i.H.Farooqi Environmental Engineering Section Department of Civil EngineeringAligarh Muslim UniversityAligarh202002India

The cultivation of aerobic granules in sequencing batch reactor for the biodegradation of p-cresol was studied. The reactor was started with 100 mg/L of p-cresol. Aerobic granules first appeared within one month of start up. The granules were large and strong and had a compact structure. The diameter of stable granules was in the range of 1-5 mm. The integrity coefficient and granules density was found to be 96% and 1046 kg/m3, raspectively, The settling velocity of granules was found to be in the range of 2×10^-2-6×10^-7 m/sec. The aerobic granules were able to degrade p-cresol upto 800 mg/L at a removal efficiency of 88%. Specific p-cresol degradation rate in aerobic granules followed Haldane model for substrate inhibition, High specific p-cresol degradation rate up to 0,96 g pcresol/（g ***） were sustained upto p-cresol concentration of 400 mg/L, Higher removal efficiency, good settling characteristics of aerobic granules, makes sequencing batch reactor suitable for erLhaneing the microorganism potential for biodegradation of inhibitory compounds.

关键词： aerobic granules p-cresol sequencing batch reactor (SBR) haldane kinetics equation

Electron correlation effects on exchange interactions and spin excitations in 2D van der Waals materials

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npj Computational Materials 2021年第1期7卷 33-40页

作者： Liqin Ke Mikhail i.Katsnelson Ames Laboratory U.S.Department of EnergyAmesIowa 50011USA institute for Molecules and Materials Radboud UniversityHeijendaalseweg 1356525AJ NijmegenThe Netherlands

Despite serious effort,the nature of the magnetic interactions and the role of electron-correlation effects in magnetic twodimensional(2D)van der Waals materials remains *** Cri3 as a model system,we show that the calculated electronic structure including nonlocal electron correlations yields spin excitations consistent with inelastic neutron-scattering ***,this approach identifies an unreported correlation-enhanced interlayer super-superexchange,which rotates the magnon Dirac lines off,and introduces a gap along the high-symmetryΓ-K-M *** discovery provides a different perspective on the gap-opening mechanism observed in Cri3,which was previously associated with spin–orbit coupling through the Dzyaloshinskii–Moriya interaction or Kitaev *** observation elucidates the critical role of electron correlations on the spin ordering and spin dynamics in magnetic van der Waals materials and demonstrates the necessity of explicit treatment of electron correlations in the broad family of 2D magnetic materials.

关键词： interaction materials excitation

Outcomes of COViD-19 among patients with liver disease

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World Journal of Gastroenterology 2023年第5期29卷 815-824页

作者： isidora Vujčić institute of Epidemiology Faculty of MedicineUniversity of BelgradeBelgrade 11000BelgradeSerbia

Coronavirus disease 2019(COViD-19)is primarily a respiratory disease with multi-organ involvement,including impaired liver *** has been noticed that a significant proportion of COViD-19 patients have liver dysfunction,especially those with a more severe disease *** coronavirus causes direct damage to the liver using the angiotensin-converting enzyme 2,a cell-surface receptor for cellular entry,that is expressed in the *** to previous research,liver enzyme abnormalities were observed in a considerable proportion of COViD-19 patients,and elevated liver transaminases were found in about 20%of these patients,alkaline phosphatase in 6.1%,and gamma-glutamyl transferase in 21.1%.COViD-19 might trigger a deterioration of liver function in patients with pre-existing chronic liver diseases(CLDs)and also in those without previous liver *** majority of COViD-19 patients who develop liver injury are men,the elderly,and those with a higher body mass *** to the general population,COViD-19 is associated with significant morbidity and mortality in patients with liver disease(cirrhosis and liver transplantation recipients).However,some studies indicate that CLDs have a lesser role in determining patient progression towards higher disease severity.

关键词： Liver disease COViD-19 Mortality Prognosis Liver function

Buoyant Marangoni convection of nanofluids in square cavity

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Applied Mathematics and Mechanics(English Edition) 2015年第9期36卷 1169-1184页

作者： H.SALEH i.HASHiM School of Mathematical Sciences Universiti Kebangsaan Malaysia Solar Energy Research institute Universiti Kebangsaan Malaysia Research institute Center for Modeling & Computer Simulation(RI/CM&CS)King Fahd University of Petroleum & Minerals

The buoyant Marangoni convection heat transfer in a differentially heated cavity is numerically studied. The cavity is filled with water-Ag, water-Cu, water-Al2O3, and water-TiO2 nanofiuids. The governing equations are based on the equations involving the stream function, vorticity, and temperature. The dimensionless forms of the governing equations are solved by the finite difference （FD） scheme consisting of the alternating direction implicit （ADi） method and the tri-diagonal matrix algorithm （TDMA）. it is found that the increase in the nanoparticle concentration leads to the decrease in the flow rates in the secondary cells when the convective thermocapillary and the buoyancy force have similar strength. A critical Marangoni number exists, below which increasing the Marangoni number decreases the average Nusselt number, and above which increasing the Marangoni number increases the average Nusselt number. The nanoparticles play a crucial role in the critical Marangoni number.

关键词： finite difference method Marangoni convection nanofluid