检索结果-南通市图书馆

Tunneling Through Black Rings

在线全文

学校读者我要写书评

暂无评论

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

作者： ZHAO Liu department of physics,nankai university,{3.,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

Quantum Entanglement of Two Flux Qubits Induced by an Auxiliary SQUID

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical physics 2007年第12期48卷 1003-1008页

作者： SHI Tao SONG Zhi department of physics,nankai university,{3.,China department of physics Nankai University

We revisit a theoretical scheme to create quantum entanglement of two three-level superconducting quantuminterference devices (SQUIDs) with the help of an auxiliary *** this scenario,two three-level systems are coupledto a quantized cavity field and a classical external field and thus form dark *** quantum entanglement can beproduced by a quantum measurement on the auxiliary *** investigation emphasizes the quantum effect of theauxiliary *** the experimental feasibility and accessibility of the scheme,we calculate the time evolution of thewhole system including the auxiliary *** ensure the efficiency of generating quantum entanglement,relationsbetween the measurement time and dominate parameters of the system are analyzed according to detailed calculations.

关键词： superconducting quantum interference device entangled state quantum information dark state

Engineering oxygen vacancies on Tb-doped ceria supported Pt catalyst for hydrogen production through steam reforming of long-chain hydrocarbon fuels

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第4期68卷 181-192页

作者： Zhourong Xiao Changxuan Zhang Peng Li Desong Wang Xiangwen Zhang Li Wang Jijun Zou guozhu Li State Key Laboratory of Metastable Materials Science and Technology(MMST) Hebei Key Laboratory of Applied ChemistryCollege of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Steam reforming of long-chain hydrocarbon fuels for hydrogen production has received great attention for thermal management of the hypersonic vehicle and fuel-cell *** this work,Pt catalysts supported on CeO_(2)and Tb-doped CeO_(2)were prepared by a precipitation *** physical structure and chemical properties of the as-prepared catalysts were characterized by powder X-ray diffraction,scanning electron microscopy,transmission electron microscopy,Raman spectroscopy,H_(2)temperature programmed reduction,and X-ray photoelectron *** results show that Tb-doped CeO_(2)supported Pt possesses abundant surface oxygen vacancies,good inhibition of ceria sintering,and strong metal-support interaction compared with CeO_(2)supported *** catalytic performance of hydrogen production via steam reforming of long-chain hydrocarbon fuels(n-dodecane)was *** with 2Pt/CeO_(2),2Pt/Ce_(0.9)Tb_(0.1)O_(2),and 2Pt/Ce_(0.5)Tb_(0.5)O_(2),the 2Pt/Ce_(0.7)Tb_(0.3.O_(2)has higher activity and stability for hydrogen production,on which the conversion of n-dodecane was maintained at about 53.2%after 600 min reaction under 700℃at liquid space velocity of 9 ml·g^(-1)·h^(-1).2Pt/CeO_(2)rapidly deactivated,the conversion of n-dodecane was reduced to only 41.6%after 600 min.

关键词： Steam reforming n-Dodecane Hydrogen production Pt-based catalyst Oxygen vacancy CeO_(2)

Nonlinear Dynamical Behavior in BS Evolution Model Based on Small-World Network Added with Nonlinear Preference

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical physics 2007年第7期48卷 137-142页

作者： ZHANG Ying-Yue YANG Qiu-Ying CheN Tian-Lun department of physics,{3.,{3.,China department of physics Nankai University Tianjin 300071 China

We introduce a modified small-world network adding new links with nonlinearly preferential connectioninstead of adding randomly,then we apply Bak-Sneppen(BS)evolution model on this *** study severalimportant structural properties of our network such as the distribution of link-degree,the maximum link-degree,and thegth of the shortest *** further argue several dynamical characteristics of the model such as the important criticalvalue f_c,the f_0 avalanche,and the mutating condition,and find that those characteristics show panticular behaviors.

关键词： power-law behavior small-world network evolution model nonlinear preference

Discussion of Some Problems About Nonlinear Time Series Prediction Using v-Support Vector Machine

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical physics 2007年第7期48卷 117-124页

作者： GAO Cheng-Feng CheN Tian-Lun NAN Tian-Shi department of {3.,nankai university,{3.,China department of physics Nankai University Tianjin 300071 China

Some problems in using v-support vector machine(v-SVM)for the prediction of nonlinear time series *** problems include selection of various net parameters,which affect the performance of prediction,mixtureof kernels,and decomposition cooperation linear programming v-SVM regression,which result in improvements of *** simulations in the prediction of nonlinear time series produced by Mackey-Glass equation andLorenz equation provide some improved results.

关键词： v-SVM nonlinear time series prediction

ROR2 promotes invasion and chemoresistance of triple-negative breast cancer cells by activating PI3./AKT/mTOR signaling

在线全文

学校读者我要写书评

暂无评论

Oncology Research 2024年第7期32卷 1209-1219页

作者： XIA DA HAN GE JUNFENG SHI CHUNHUA ZHU guozhu WANG YUAN FANG JIN XU department of Breast and Thyroid Nanjing First HospitalNanjing Medical UniversityNanjingChina department of General Surgery The First Affiliated Hospital of Nanjing Medical UniversityNanjingChina department of Oncology Nanjing First HospitalNanjing Medical UniversityNanjingChina department of Pathology Nanjing First HospitalNanjing Medical UniversityNanjingChina

Objective:This study aimed to investigate the role of receptor tyrosine kinase-like orphan receptor 2(ROR2)in triple-negative breast cancer(TNBC).Methods:ROR2 expression in primary TNBC and metastatic TNBC tissues was analyzed by immunohistochemical staining and ***2 expression in TNBC cell lines was detected by PCR and Western blot *** migration,invasion and chemosensitivity of TNBC cells with overexpression or knockdown of ROR2 were ***:ROR2 expression was high in metastatic TNBC ***2 knockdown suppressed the migration,invasion and chemoresistance of TNBC ***2 overexpression in MDA-MB-43. cells promoted the migration,invasion,and ***,ROR2 knockdown in HC1599 and MDA-MB-43. adriamycin-resistant cells enhanced chemosensitivity to ***2 could activate PI3./AKT/mTOR signaling in TNBC ***:ROR2 is upregulated and promotes metastatic phenotypes of TNBC by activating PI3./AKT/mTOR signaling.

关键词： Receptor tyrosine kinase-like orphan receptor 2 Triplet-negative breast cancer Proliferation Apoptosis PI3./AKT/mTOR signaling Metastasis

Wave-packet method for instability of three-dimensionalboundary layer of swept wing

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

Chinese Science Bulletin 1998年第6期43卷 461-464页

作者： ZHAO Gengfu department of physics, tianjin {3., tianjin 3.0072, China department of physics Tianjin University Tianjin China

A wave-packet method is proposed to study evolution the behavior of disturbances in 3.D boundary layer on a swept plate. It is proved that the constant-phase lines are equivalent to the streaks observed in flow-visual... 详细信息

关键词： swept plate wave packet structure of streaks.

Views on “Principle of limitation of physical quantities and cyclic universe”

在线全文

学校读者我要写书评

暂无评论

Science China(physics,Mechanics & Astronomy) 2010年第9期53卷 1772-1774页

作者： LI LianGang department of physics,School of Sciences,tianjin {3.,tianjin 3.0072,China tianjin university Department of Physics School of Sciences Tianjin China (GRID:grid.33763.32) (ISNI:***)

This paper presents an analysis of a paper entitled "Principle of limitation of physical quantities and cyclic universe" and proposes different results for some formulae from that *** addition,this paper shows that the principle of limits coupling may lead to an approximation of current theories(i.e.,quantum theory and relativistic theory),which have interesting correlations with the Plank formula and the special theory of relativity.

关键词： principle of limitation of physical quantities limits coupling formulae Plank formula theory of relativity

Low－Temperature　Spectral　Properties　and　Zero－Phonon　Transitions　of　Alkali　Halide　Crystal　Materials　Bombarded　with　Electrons　and　Implanted　with　Ions

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Lasers 1995年第2期B4卷 111-116页

作者： GU Hongen(department of Applied physics, tianjin {3., tianjin 3.0072, China) tianjin Univ Tianjin China

Ｌｏｗ－ＴｅｍｐｅｒａｔｕｒｅＳｐｅｃｔｒａｌＰｒｏｐｅｒｔｉｅｓａｎｄＺｅｒｏ－ＰｈｏｎｏｎＴｒａｎｓｉｔｉｏｎｓｏｆＡｌｋａｌｉＨａｌｉｄｅＣｒｙｓｔａｌＭａｔｅｒｉａｌｓＢｏｍｂａｒｄｅｄｗｉｔｈＥｌｅｃｔｒｏ... 详细信息

Ｌｏｗ－ＴｅｍｐｅｒａｔｕｒｅＳｐｅｃｔｒａｌＰｒｏｐｅｒｔｉｅｓａｎｄＺｅｒｏ－ＰｈｏｎｏｎＴｒａｎｓｉｔｉｏｎｓｏｆＡｌｋａｌｉＨａｌｉｄｅＣｒｙｓｔａｌＭａｔｅｒｉａｌｓＢｏｍｂａｒｄｅｄｗｉｔｈＥｌｅｃｔｒｏｎｓａｎｄＩｍｐｌａｎｔｅｄｗｉｔ...

关键词： zero-phonon transition. color centers