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tWO PHASES OF CENOZOIC DEFORMAtION IN NORtHEAStERN tIBEt: tHRUStING FOLLOWED BY StRIKE-SLIP FAULtING

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地学前缘 2000年第S1期7卷 294-294页

作者： Matt S. Spurlin 1, yin An 1, t. Mark Harrison 1, Brian K. Horton 1,3 , Zhou Jiangyu 2, Wang Jianghai 2(1 Department of Earth and Space Sciences, University of California, Los Angeles,CA 90095\|1567 USA, E\|mail mspurlin@ucla.edu 2 Guangzhou

In order to establish deformation history for the Cenozoic development of the tibetan Plateau, we conducted geologic mapping along a 120km traverse between Nangqian and Yushu in the northeastern Qiangtang terrane. this work reveals a complex interaction among tertiary thrusting, strike\|slip faulting, sedimentation, and igneous activity. two phases of deformation are recognized. the older northeast—southwest shortening, expressed by thrusting and folding, is followed by left\|slip faulting along northwest\|trending faults. tertiary thrusts, predominantly southwest\|dipping, are distributed throughout the traverse, and typically juxtapose Mesozoic strata over Paleogene strata. the latter were deposited in several separated basins during folding and thrusting, as indicated by well\|developed growth strata. A preliminary construction of balanced cross\|sections suggests a minimum estimate of 45km of crustal shortening along the traverse. Numerous hypabyssal intrusions were mapped in the southern part of the traverse near Nangqian. they were emplaced into the Paleogene sediments and are dated between 36 and 33Ma by 40 Ar/ 39 Ar and U\|Pb methods. Paleogene sediments are also interbedded with volcanics in both the southern and northern parts of the study area. In the northernmost part of the traverse, a volcanic unit overlies a tertiary thrust. this unit itself is broadly folded. this relationship suggests that tertiary igneous activity was coeval with contractional deformation in the region, implying strongly the causal relationship between the two processes. the youngest event in the area is the development of northwest\|trending left\|slip faults. they cut tertiary thrusts, folds, and about 35Ma igneous intrusions. In contrast to widely distributed tertiary folds and thrusts, strike\|slip faulting is restricted only to the southern portion of our mapped area near Nangqian. the strike\|slip faults apparently control the distribution of modern drainage systems, suggesti

关键词： thrusting strike\|slip Cenozoic igneous activity sed imentation Qiangtang tibet

INVARIANt DENSItY, LYAPUNOV EXPONENt, AND ALMOSt SURE StABILItY OF MARKOVIAN-REGIME-SWItCHING LINEAR SYStEMS

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Journal of Systems Science & Complexity 2011年第1期24卷 79-92页

作者： Qi HE Gang George yin Department of Mathematics Wayne State University Detroit MI 48202 USA

this paper is concerned with stability of a class of randomly switched systems of ordinary differential equations. the system under consideration can be viewed as a two-component process （X（t）, α（t））, where the system is linear in X（t） and α（t） is a continuous-time Markov chain with a finite state space. Conditions for almost surely exponential stability and instability are obtained. the conditions are based on the Lyapunov exponent, which in turn, depends on the associate invaxiant density. Concentrating on the case that the continuous component is two dimensional, using transformation techniques, differential equations satisfied by the invariant density associated with the Lyapunov exponent are derived. Conditions for existence and uniqueness of solutions are derived. then numerical solutions are developed to solve the associated differential equations.

关键词： Invariant density Lyapunov exponent randomly switching ordinary differential equation.

Recognition of self and altered self by t cells in autoimmunity and allergy

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Protein & Cell 2013年第1期4卷 8-16页

作者： Lei yin Shaodong Dai Gina Clayton Wei Gao Yang Wang John Kappler Philippa Marrack Howard Hughes Medical Institute and Integrated Department of Immunology National Jewish HealthDenverCO 80206USA Integrated Department of Immunology National Jewish HealthDenverCO80206USA Program in Structural Biology and Biophysics University of Colorado DenverSchool of MedicineAuroraCO 80045USA Department of Biochemistry and Molecular Genetics University of Colorado DenverSchool of MedicineAuroraCO 80045USA

t cell recognition of foreign peptide antigen and toler-ance to self peptides is key to the proper function of the immune ***,in the thymus t cells that rec-ognize self MHC+self peptides are deleted and those with the potential to recognize self MHC+foreign pep-tides are selected to *** there are excep-tions to these *** and allergy are two of the most common immune diseases that can be related to recognition of *** genes work together to lead to *** those,particular MHC alleles are the most strongly associated,reflecting the key importance of MHC presentation of self peptides in autoimmunity.t cells specific for combinations of self MHC and self pep-tides may escape thymus deletion,and thus be able to drive autoimmunity,for several reasons:the relevant self peptide may be presented at low abundance in the thy-mus but at high level in particular peripheral tissues;the relevant self peptide may bind to MHC in an unusual register,not present in the thymus but apparent else-where;finally the relevant self peptide may be post translationally modified in a tissue specific *** some types of allergy,the peptide+MHC combination may also be fully derived from *** the combi-nation in question may be modified by the presence of other ligands,such as small drug molecules or metal *** these types of allergies may act like the post translationally modified peptides involved some types of autoimmunity.

关键词： altered self neoantigen antigen presenting t cell recognition autoimmunity allergy diabetes der-matitis drug hypersensitivity

Science Letters:Chemically processed Nb-doped SrtiO_3 films and properties

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第8期7卷 1436-1439页

作者： yin Ming-zhi Applied Chemicals Department Northwest Polytechnique University Xi ＇an 710072 China

Homogeneous, crack-free SrNbxti1-xO3 thin films on （110） silicon substrates were successfully fabricated by sol-gel processing. the optimum route and conditions were systematically investigated. Sr（OAc）2 glacial acetic acid solution, after being refluxed and reacted with tartrate, formed Sr（OAc）2（C4H6O6）2; ti（OBu）4 formed ti（OAc）4-x（AcAc）x. after having the ligand partially exchanged with AcAc, while Nb（OC2H5）5 formed （OAc）2Nb（AcAc）（C4H606）by exchanging of ligand in glacial acetic acid with （CH3CO）2O. All the metal species after undergoing partial hydrolysis and polymerization with hydroxyl or oxygen, formed SrNb,ti1-xO3 cluster sol. Methyl cellulose （MCL） caused SrNbxti1-xO3 sol to have polymeric structure and easily form films. SrNbxti1-xO3 films with perovskite were subsequently formed after being annealed at 650-750 ℃ for 60 min in 25% N2＋75% H2 （volume ratio） atmosphere. Resistivity of the SrNb0.1 ti0.9O3 films at room temperature was 64 μΩ·cm, a particular t2 temperature dependence of the resistivity, from 25 K up to room temperature, was observed.

关键词： SrNbxti1-xO3 (SNtO) film Sol-gel technique Donor-doping-semiconductor

Semi-supervised learning based hybrid beamforming under time-varying propagation environments

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Digital Communications and Networks 2024年第4期10卷 1168-1177页

作者： yin Long Hang Ding Simon Murphy School of Computer Science and technology Southwest University of Science and TechnologyMianyang621000China Department of Computing Science University of AlbertaEdmontonT6G 2R3Canada

Hybrid precoding is considered as a promising low-cost technique for millimeter wave(mm-wave)massive Multi-Input Multi-Output(MIMO)*** this work,referring to the time-varying propagation circumstances,with semi-supervised Incremental Learning(IL),we propose an online hybrid beamforming ***,given the constraint of constant modulus on analog beamformer and combiner,we propose a new broadnetwork-based structure for the design model of hybrid *** with the existing network structure,the proposed network structure can achieve better transmission performance and lower ***,to enhance the efficiency of IL further,by combining the semi-supervised graph with IL,we propose a hybrid beamforming scheme based on chunk-by-chunk semi-supervised learning,where only few transmissions are required to calculate the label and all other unlabelled transmissions would also be put into a training data *** the existing single-by-single approach where transmissions during the model update are not taken into the consideration of model update,all transmissions,even the ones during the model update,would make contributions to model update in the proposed *** the model update,the amount of unlabelled transmissions is very large and they also carry some information,the prediction performance can be enhanced to some extent by these unlabelled channel *** results demonstrate the spectral efficiency of the proposed method outperforms that of the existing single-by-single ***,we prove the general complexity of the proposed method is lower than that of the existing approach and give the condition under which its absolute complexity outperforms that of the existing approach.

关键词： Hybrid beamforming time-varying environments Broad network Semi-supervised learning Online learning

Comprehensive modeling strategy for thermomechanical tribological behavior analysis of railway vehicle disc brake system

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Friction 2024年第1期12卷 74-94页

作者： Jiabao yin Chun LU Jiliang MO School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China technology and Equipment of Rail transit Operation and Maintenance Key Laboratory of Sichuan Province Chengdu 610031China

A comprehensive modeling strategy for studying the thermomechanical tribological behaviors is proposed in this *** wear degradation considering the influence of temperature(t)is predicted by Archard wear model with the help of the UMESHMOtION subroutine and arbitrary Lagrangian–Eulerian(ALE)remeshing *** the proposed method,the thermomechanical tribological behaviors of railway vehicle disc brake system composed of forged steel brake disc and Cu-based powder metallurgy(PM)friction block are studied *** effectiveness of the proposed methodology is validated by experimental test on a self-designed scaled brake test bench from the perspectives of interface temperature,wear degradation,friction noise and vibration,and contact status *** work can provide an effective way for the investigation of thermomechanical tribological behaviors in the engineering field.

关键词： tribological behaviors thermomechanical field wear prediction finite element simulation disc brake system railway vehicle

A molecular arms race between host innate antiviral response and emerging human coronaviruses

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Virologica Sinica 2016年第1期31卷 12-23页

作者： Lok-yin Roy Wong Pak-yin Lui Dong-Yan Jin School of Biomedical Sciences The University of Hong Kong

Coronaviruses have been closely related with mankind for thousands of years. Communityacquired human coronaviruses have long been recognized to cause common cold. However,zoonotic coronaviruses are now becoming more a global concern with the discovery of highly pathogenic severe acute respiratory syndrome(SARS) and Middle East respiratory syndrome(MERS) coronaviruses causing severe respiratory diseases. Infections by these emerging human coronaviruses are characterized by less robust interferon production. treatment of patients with recombinant interferon regimen promises beneficial outcomes, suggesting that compromised interferon expression might contribute at least partially to the severity of disease. the mechanisms by which coronaviruses evade host innate antiviral response are under intense investigations. this review focuses on the fierce arms race between host innate antiviral immunity and emerging human coronaviruses. Particularly, the host pathogen recognition receptors and the signal transduction pathways to mount an effective antiviral response against SARS and MERS coronavirus infection are discussed. On the other hand, the counter-measures evolved by SARS and MERS coronaviruses to circumvent host defense are also dissected. With a better understanding of the dynamic interaction between host and coronaviruses, it is hoped that insights on the pathogenesis of newly-identified highly pathogenic human coronaviruses and new strategies in antiviral development can be derived.

关键词： MERS-CoV SARS-CoV innate antiviral response type I interferons immune evasion

Full-Sized Pore Structure and Fractal Characteristics of Marine-Continental transitional Shale: A Case Study in Qinshui Basin, North China

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Acta Geologica Sinica(English Edition) 2019年第3期93卷 675-691页

作者： yin Liangliang GUO Shaobin School of Energy resources China University of Geosciences(Beijing)Beijing 10083China Key laboratory of strategy evaluation for Shale gas Ministry of Land and ResourcesBeijing 10083China

Based on 10 shale samples collected from 4 wells in Qinshui Basin,we investigate the full-sized pore structure and fractal characteristics of Marine-Continental transitional shale by performing organic geochemistry,mineralogical composition,Nitrogen gas adsorption(N2 adsorption)and Nuclear Magnetic Resonance(NMR)measurements and fractal *** show that the tOC content of the shale samples is relatively high,with an average value of 2.44wt%,and the thermal evolution is during the mature-over mature *** NMR t2 spectrum can be used to characterize the fullsized pore structure characteristics of *** combining N2 adsorption pore structure parameters and NMR t2 spectrums,the surface relaxivity of samples are calculated to be between 1.7877 um/s and 5.2272 um/*** this basis,the t2 spectrums are converted to full-sized pore volume and surface area distribution *** statistics show that the pore volume is mainly provided by mesopore,followed by micropore,and the average percentages are 65.04%and 30.83%respectively;the surface area is mainly provided by micropore,followed by mesopore,and the average percentages are 60.8004%and 39.137%respectively;macropore contributes little to pore volume and surface *** pore structure characteristics of shale have no relationship with tOC,but strong relationships with clay minerals *** fractal dimensions Dmicro and Dmeso have strong positive relationships with the N2 adsorption fractal dimensions D1 and D2 respectively,indicating that Dmicro can be used to characterize the fractal characteristics of pore surface,and Dmeso can be used to characterize the fractal characteristics of pore *** shale surface relaxivity is controlled by multiple *** increasing of clay mineral content,pore surface area,pore surface fractal dimension and the decreasing of average pore size,will all lead to the decreasing of shale surface relaxivity.

关键词： Marine-Continental transitional shale nuclear magnetic resonance nitrogen adsorption full-sized pore structure fractal dimensions

Global Existence of Strong Solutions of Navier-Stokes-Poisson Equations for One-Dimensional Isentropic Compressible Fluids

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Chinese Annals of Mathematics,Series B 2008年第4期29卷 441-458页

作者： Junping yin Zhong tAN Department of Mathematics Xiamen University Xiamen 361005 Fujian China.

the authors prove two global existence results of strong solutions of the isentropic compressible Navier-Stokes-Poisson equations in one-dimensional bounded intervals. the first result shows only the existence. And the second one shows the existence and uniqueness result based on the first result, but the uniqueness requires some compatibility condition. In this paper the initial vacuum is allowed, and t is bounded.

关键词： Global strong solutions Navier-Stokes-Poisson equations Existence and uniqueness