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Tunneling Through Black Rings

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Communications in Theoretical physics 2007年第5期47卷 835-842页

作者： zhao Liu department of physics,Nankai university,tianjin 300071,china department of physics Nankai University

Hawking radiation of black ring solutions to 5-dimensional Einstein-Maxwell-dilaton theory is analyzedby use of the Parikh-Wilczek tunneling *** get the correct tunneling amplitude and emission rate,we adoptand develop the Angheben-Nadalini-Vanzo-Zerbini covariant approach to cover the effects of rotation and electronicdischarge all at once,and the effect of back reaction is also taken into *** constitutes a unified approach tothe tunneling *** the first law of thermodynamics for black rings holds,the emission rate is proportionalto the exponential of the change of Bekenstein-Hawking *** calculation for black ring temperatures agreesexactly with the results obtained via the classical surface gravity method and the quasi-local formalism.

关键词： black ring radiation tunneling method

Research on analysis method for temperature control information of high arch dam construction

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Science china(Technological Sciences) 2011年第S1期54卷 40-46页

作者： ZHONG DengHua,zhao ChenSheng & REN BingYu department of Hydraulic and Hydroelectric Engineering,School of Civil Engineering,tianjin university,tianjin 300072,china department of Hydraulic and Hydroelectric Engineering School of Civil Engineering Tianjin University

Temperature control,which is directly responsible for the project quality and progress,plays an important role in high arch dam *** to discover the rules from a large amount of temperature control information collected in order to guide the adjustment of temperature control measures to prevent cracks on site is the key scientific *** this paper,a mathematic logical model was built firstly by means of a coupling analysis of temperature control system decomposition and coordination for high arch ***,an analysis method for temperature control information was presented based on data mining ***,the data warehouse of temperature control was designed,and the artificial neural network forecasting model for the highest temperature of concrete was also ***,these methods were applied to a practical project. The result showed that the efficiency and precision of temperature control was improved,and rationality and scientificity of management and decision-making were *** of these researches provided an advanced analysis method for temperature control in the high arch dam construction process.

关键词： high arch dam construction temperature control information data mining data warehouse neural network model

SOME RESULTS ON INFINITE DIMENSIONAL NOVIKOV ALGEBRAS

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Chinese Annals of Mathematics,Series B 2003年第3期24卷 309-314页

作者： zhao YUFENG MENG DAOJI department of Mathematics, Nankai university, tianjin 300071, china. department of Mathematics, Nankai university, tianjin 300071, china. department of Mathematics Nankai University Tianjin 300071

This paper gives some sufficient conditions for determining the simplicity of infinite di-mensional Novikov algebras of characteristic 0, and also constructs a class of simple Novikovalgebras by extending the base fie... 详细信息

关键词： Novikov algebra Novikov-Poisson Algebra Algebraic deformation

Identification of residues in Lassa virus glycoprotein 1 involved in receptor switch

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Virologica Sinica 2024年第4期39卷 600-608页

作者： Jiao Guo Yi Wan Yang Liu Xiaoying Jia Siqi Dong gengfu Xiao Wei Wang State Key Laboratory of Virology Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of SciencesWuhan 430071China university of the Chinese Academy of Sciences Beijing 100049China The Xi'an Key Laboratory of Pathogenic Microorganism and Tumor Immunity School of Basic MedicineXi'an Medical UniversityXi'an 710021China

Lassa virus(LASV)is an enveloped,negative-sense RNA virus that causes Lassa hemorrhagic *** entry of LASV requires the viral glycoprotein 1(GP1)to undergo a receptor switch from its primary receptor alpha-dystroglycan(α-DG)to its endosomal receptor lysosome-associated membrane protein 1(LAMP1).A conserved histidine triad in LASV GP1 has been reported to be responsible for receptor *** test the hypothesis that other non-conserved residues also contribute to receptor switch,we constructed a series of mutant LASV GP1 proteins and tested them for binding to *** residues,L84,K88,L107,and H170,were identified as critical for receptor *** any of the four residues with the corresponding lymphocytic choriomeningitis virus(LCMV)residue(L84 N,K88E,L10F,and H170S)reduced the binding affinity of LASV GP1 for ***,all mutations caused decreases in glycoprotein precursor(GPC)-mediated membrane fusion at both pH 4.5 and *** infectivity of pseudotyped viruses bearing either GPCL84N or GPCK88E decreased sharply in multiple cell types,while L107F and H170S had only mild effects on *** biolayer light interferometry assay,we found that all four mutants had decreased binding affinity to LAMP1,in the order of binding affinity being L84 N>L107F>K88E>*** four amino acid loci identified for the first time in this study have important reference significance for the in-depth investigation of the mechanism of receptor switching and immune escape of LASV occurrence and the development of reserve anti-LASV infection drugs.

关键词： Lassa virus(LASV) Lysosome-associated membrane protein 1 (LAMP1) Glycoprotein Receptor switch Membrane fusion

New Monotonicity Formulae for Semi-linear Ellipti and Parabolic Systems

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Chinese Annals of Mathematics,Series B 2010年第3期31卷 411-432页

作者： Li MA Xianfa SONG Lin zhao department of Mathematical Sciences Tsinghua University Beijing 100084 China. department of Mathematics Tianjin University Tianjin 300072 China.

The authors establish a general monotonicity formula for the following elliptic system △ui＋fi（x,ui,…,um）=0 in Ω,where Ω belong to belong to R^n is a regular domain, （fi（x, u1,... ,um）） = △↓F（x,→↑u）, F（x,→↑u ） is a given smooth function of x ∈ R^n and →↑u = （u1,…,um） ∈ R^m. The system comes from understanding the stationary case of Ginzburg-Landau model. A new monotonicity formula is also set up for the following parabolic systemδtui-△ui-fi（x,ui,…,um）=0 in（ti,t2）×R^n,where t1 〈 t2 are two constants, （fi（x,→↑u ） is given as above. The new monotonicity formulae are focused more attention on the monotonicity of nonlinear terms. The new point of the results is that an index β is introduced to measure the monotonicity of the nonlinear terms in the problems. The index β in the study of monotonieity formulae is useful in understanding the behavior of blow-up sequences of solutions. Another new feature is that the previous monotonicity formulae are extended to nonhomogeneous nonlinearities. As applications, the Ginzburg-Landau model and some different generalizations to the free boundary problems are studied.

关键词： Elliptic systems Parabolic system Monotonicity formula Ginzburg-Landau model

Partial hydrogenation of adiponitrile to 6-aminocapronitrile over Ni/α-Al_2O_3 catalyst promoted with K_2O and La_2O_3

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Chinese Chemical Letters 2007年第6期18卷 685-688页

作者： Lei zhao, Cai Yun Wang, Ji Xiang Chen , Ji Yan Zhang department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, tianjin university, tianjin 300072, china department of Catalysis Science and Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A novel K2O and La2O3 promoted nickel catalyst supported on a-Al2O3 was prepared by co-impregnation method, and it exhibited higher activity and 6-aminocapronitrile selectivity than Ni/a-Al2O3 during the hydrogenation of adiponitrile in the absence of ammonia, i.e., K2O and La2O3 improved the performance of the nickel-based catalyst.

关键词： Nickel catalyst Potassium oxide Lanthana Partial hydrogenation Adiponitrile 6-Aminocapronitrile

Differences of Weighted Composition Operators from Mixed-Norm Spaces to Weighted-Type Spaces

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Journal of Mathematical Research with Applications 2012年第5期32卷 615-625页

作者： Xianhao zhao,Yuxia LIANG department of Mathematics,tianjin university,tianjin 300072,P.R.china department of Mathematics Tianjin University Tianjin 300072

In this paper,we study the boundedness and estimate the essential norm of the differences of weighted composition operators from mixed-norm spaces to weighted-type spaces on the unit ball of CN.

关键词： weighted composition operator mixed-norm spaces weighted-type space essential norm difference.

Social-ecological perspective on the suicidal behaviour factors of early adolescents in china:a network analysis

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General Psychiatry 2024年第1期37卷 143-150页

作者： Yuan Li Peiying Li Mengyuan Yuan Yonghan Li Xueying Zhang Juan Chen gengfu Wang Puyu Su department of Maternal Child and Adolescent HealthSchool of Public HealthKey Laboratory of Population Health Across Life Cycle(Anhui Medical University)Ministry of Education of the People's Republic of ChinaAnhui Medical UniversityKey Laboratory of Population Health Across Life Cycle(Anhui Medical University)HefeiAnhuiChina tianjin Anding Hospital Mental Health Center of Tianjin Medical UniversityTianjin Medical UniversityTianjinChina department of Environmental Medicine and Public Health Icahn School of Medicine at Mount SinaiNew YorkNew YorkUSA Afiliated Psychological Hospital of Anhui Medical university Anhui Mental Health CenterFourth People's Hospital of HefeiHefeiAnhuiChina

Background In early adolescence,youth are highly prone to suicidal *** modifiable risk factors during this critical phase is a priority to inform effective suicide prevention *** To explore the risk and protective factors of suicidal behaviours(ie,suicidal ideation,plans and attempts)in early adolescence in china using a social-ecological *** Using data from the cross-sectional project‘Healthy and Risky Behaviours Among Middle School Students in Anhui Province,china',stratified random cluster sampling was used to select 5724 middle school students who had completed self-report questionnaires in November *** analysis was employed to examine the correlates of suicidal ideation,plans and attempts at four levels,namely individual(sex,academic performance,serious physical llness/disability,history of self-harm,depression,impulsivity,sleep problems,resilience),family(family economic status,relationship with mother,relationship with father,family violence,childhood abuse,parental mental illness),school(relationship with teachers,relationship with classmates,school-bullying victimisation and perpetration)and social(social support,satisfaction with society).Results In total,37.9%,19.0%and 5.5%of the students reported suicidal ideation,plans and attempts in the past 6 months,*** estimated network revealed that suicidal ideation,plans and attempts were collectively associated with a history of self-harm,sleep problems,childhood abuse,school bullying and *** analysis indicated that the most influential nodes in the network were history of self-harm and childhood ***,the network also showed unique correlates of suicidal ideation(sex,weight=0.60;impulsivity,weight=0.24;family violence,weight=0.17;relationship with teachers,weight=-0.03;school-bullying perpetration,weight=0.22),suicidal plans(social support,weight=-0.15)and suicidal attempts(relationship with mother,weight=-0.10;par

关键词： network analysis prevention

Design of Metal-clad Ti: LiNbO3 Polarizer

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Chinese Journal of Lasers 1996年第5期B5卷 444-450页

作者： HU H. Z., CHENG G.(department of applied Pysics, tianjin university, tianjin 300072, china)GEN F SONG Q., LI C. F., zhao C.(The 8358 Institute of CASC, tianjin 300192, china) tianjin Univ Tianjin China

ＤｅｓｉｇｎｏｆＭｅｔａｌ－ｃｌａｄＴｉ：ＬｉＮｂＯ＿３ＰｏｌａｒｉｚｅｒＨＵＨ．Ｚ．，ＣＨＥＮＧＧ．（ＤｅｐａｒｔｍｅｎｔｏｆａｐｐｌｉｅｄＰｙｓｉｃｓ，ＴｉａｎｊｉｎＵｎｉｖｅｒｓｉｔｙ，Ｔｉａｎｊｉｎ３０００７... 详细信息

ＤｅｓｉｇｎｏｆＭｅｔａｌ－ｃｌａｄＴｉ：ＬｉＮｂＯ＿３ＰｏｌａｒｉｚｅｒＨＵＨ．Ｚ．，ＣＨＥＮＧＧ．（ＤｅｐａｒｔｍｅｎｔｏｆａｐｐｌｉｅｄＰｙｓｉｃｓ，ＴｉａｎｊｉｎＵｎｉｖｅｒｓｉｔｙ，Ｔｉａｎｊｉｎ３０００７２，Ｃｈｉｎａ）ＧＥＮＦ；ＳＯＮＧ...

关键词： integrated optics polarizer UNbO3 waveguide