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Thermal ablation versus conventional regional hyperthermia has greater anti-tumor activity against melanoma in mice by upregulating CD4~+ cells and enhancing IL-2 secretion

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Progress in Natural Science:Materials International 2009年第12期19卷 1699-1704页

作者： Yingying Zhang~(a,b),Wei Zhang~b,Cuanying Geng~c,Tongjun Lin~d,Xiaowen Wang~b, Lingyun Zhao~b,Jintian Tang~(b,*) a department of Oncology,Xiangya Hospital,Central South university,Changsha 410008,china b Institute of Medical physics and engineering,department of engineering physics,tsinghua university,beijing 100084,china c Clinical Medical Research center,china-Japan Friendship Hospital,beijing 100029,china d department of Microbiology & Immunology,department of Pediatrics,IWK Health Centre,Dalhousie university,5850 university Avenue, Halifax,NS,Canada B3J 3G9 department of Oncology Xiangya Hospital Central South University Changsha 410008 China Institute of Medical physics and engineering Department of Engineering Physics Tsinghua University Beijing 100084 China Clinical Medical Research center China–Japan Friendship Hospital Beijing 100029 China department of Microbiology & Immunology Department of Pediatrics IWK Health Centre Dalhousie University 5850 University Avenue Halifax NS Canada B3J 3G9

To determine whether conventional hyperthermia(42-15℃) or ablation therapy(>50℃) achieves better synergistic effects on direct cytotoxicity and anti-tumor immunity,we compared the therapeutic effects of two hyperthermia temperatures,43 and 55℃,in terms of cytotoxicity and upregulation of immune functions in a mouse malignant melanoma ***-bearing mice were treated by directly applying regional hyperthermia to the tumor nodule with a heating light at a temperature of 43℃for 30 min or 55℃for 10 *** tumor growth curve and mice survival rate were *** investigate the hyperthermia-induced immunological response,peripheral blood CD4~+ and CD8~+ T cells and the serum IL-2 level were *** results indicated that application of regional hyperthermia at the ablation temperature(such as 55℃) achieved better synergistic anti-tumor effects than did conventional hyperthermia(43℃).Significant increases in the number of peripheral blood CD4~+ T cells and the serum IL-2 level likely contributed to the underlying mechanism.

关键词： Hyperthermia Thermal ablation Melanoma Immunity response

Constraints on smoothness parameter and dark energy using observational H(z) data

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Research in Astronomy and astrophysics 2011年第2期11卷 125-136页

作者： Hao-Ran Yu1,Tian Lan1,Hao-Yi Wan2,Tong-Jie Zhang1,3 and Bao-Quan Wang4 1 department of Astronomy,beijing Normal university,beijing 100875,china 2 Business Office,beijing Planetarium,beijing 100044,china 3 center for High Energy physics,Peking university,beijing 100871,china 4 department of physics,Dezhou university,Dezhou 253023,china department of Astronomy Beijing Normal University Business Office Beijing Planetarium

With large-scale homogeneity,the universe is locally inhomogeneous,clustering into stars,galaxies and larger *** property is described by the smoothness parameter α which is defined as the proportion of matter in the form of intergalactic *** we consider the inhomogeneities over a small scale,there should be modifications of the cosmological distances compared to a homogenous *** and Roeder developed a second-order ordinary differential equation（D-R equation） that describes the angular diameter distance-redshift relation for inhomogeneous cosmological ***,we may obtain the D-R equation for observational H（z） data（OHD）.The density-parameter ΩM,the state of dark energy ω,and the smoothness-parameter α are constrained by a set of OHD in a spatially flat XCDM universe as well as a spatially flat XCDM *** using a χ2 minimization method,we get α = 0.81＋0.19-0.20 and ΩM = 0.32＋0.12-0.06 at the 1σ confidence *** we assume a Gaussian prior of ΩM = 0.26 ± 0.1,we get α = 0.93＋0.07-0.19 and ΩM = 0.31＋*** the XCDM model,α is constrained to α≥ 0.80 but ω is weakly constrained around-1,where ω describes the equation of state of the dark energy（pX = ωρX）.We conclude that OHD constrains the smoothness parameter more effectively than the data of SNe Ia and compact radio sources.

关键词： cosmology -- dark energy -- cosmological parameters

Influence of Yb^(3+) concentration on the upconversion luminescence of oxyfluoride material doped with Er^(3+)

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Science china(physics,Mechanics & Astronomy) 2010年第2期53卷 310-314页

作者： ZHAO SuLing1,XU Zheng1,WANG LiHui2 & S. Wageh3 1 Institute of Optoelectronic Technology,Key Laboratory of Luminescence and Optical Information (beijing Jiaotong university),Ministry of Education,beijing 100044,china 2 department of physics,Chinese People’s Public Security university,beijing 100038,china 3 physics & engineering Mathematics department Faculty of Electronic engineering Menufiya university,Menouf 32952,Egypt Key Laboratory of Luminescence and Optical Information (beijing Jiaotong university) Ministry of Education Institute of Optoelectronic Technology Beijing China (GRID:grid.419897.a) (ISNI:***) Chinese People’s Public Security university Department of Physics Beijing China (GRID:grid.411699.2) (ISNI:***) physics & engineering Mathematics department Faculty of Electronic engineering Menufiya university Menouf Egypt (GRID:grid.411699.2)

In this paper,a new upconversion luminescent material co-doped with Erbium and Ytterbium is reported. The upconversion luminescence transition routes and related properties are studied. The results show that the absorption and emission intensities under excitation of 980 nm laser increase with the increase of the Yb3+ concentration. The red emission is stronger than the green emission. The energy transfer process plays an important role in the upconversion mechanism.

关键词： upconversion luminescence Er3+ Yb3+

On the definition of fractional derivatives in rheology

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Theoretical & Applied Mechanics Letters 2011年第1期1卷 62-65页

作者： Fan Yang~(1,2,a)) and Ke-Qin Zhu~(1,b)) 1)department of engineering Mechanics,tsinghua university,beijing 100084,china 2)department of physics,the Chinese university of Hong Kong,Hong Kong,china department of engineering Mechanics Tsinghua University Beijing 100084 ChinaDepartment of Physics the Chinese University of Hong Kong Hong Kong China

During the last two decades fractional calculus has been increasingly applied to physics, especially to *** is well known that there are obivious differences between Riemann-Liouville (R-L) definition and Caputo definition,which are the two most commonly used definitions of fractional *** multiple definitions of fractional derivatives have hindered the application of fractional calculus in *** this paper,we clarify that the R-L definition and Caputo definition are both Theologically unreasonable with the help of the mechanical analogues of the fractional element *** also find that to make them more reasonable Theologically,the lower terminals of both definitions should be put to—∞.We further prove that the R-L definition with lower terminal—∞and the Caputo definition with lower terminal—∞are equivalent in the differentiation of functions that are smooth enough and functions that have finite number of singular *** we can define the fractional derivatives in rheology as the R-L derivatives with lower terminal—∞(or,equivalently,the Caputo derivatives with lower terminal—∞) not only for steady-state processes,but also for transient processes.

关键词： fractional derivative Caputo definition Riemann-Liouville definition Scott-Blair model

POPULATION DYNAMICS IN THE FOUR-PHOTON THREE-STEP PHOTOIONIZATION

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原子与分子物理学报 1994年第2期11卷 129-136+140页

作者： Shiliang Xie Dewu Wang Chuntion Ying(department of engineering physics, tsinghua university, beijing. PRC) 清华大学工程物理系北京

ＰＯＰＵＬＡＴＩＯＮＤＹＮＡＭＩＣＳＩＮＴＨＥＦＯＵＲ－ＰＨＯＴＯＮＴＨＲＥＥ－ＳＴＥＰＰＨＯＴＯＩＯＮＩＺＡＴＩＯＮ￥ＳｈｉｌｉａｎｇＸｉｅ；ＤｅｗｕＷａｎｇ；ＣｈｕｎｔｉｏｎＹｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＥｎ... 详细信息

ＰＯＰＵＬＡＴＩＯＮＤＹＮＡＭＩＣＳＩＮＴＨＥＦＯＵＲ－ＰＨＯＴＯＮＴＨＲＥＥ－ＳＴＥＰＰＨＯＴＯＩＯＮＩＺＡＴＩＯＮ￥ＳｈｉｌｉａｎｇＸｉｅ；ＤｅｗｕＷａｎｇ；ＣｈｕｎｔｉｏｎＹｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＥｎｇｉｎｅｅｒｉｎｇＰｈｙｓｉｃｓ，...

关键词： STEP POPULATION DYNAMICS IN THE FOUR-PHOTON THREE-STEP PHOTOIONIZATION

Preparation of nanocrystalline BaTiO_3 ceramics

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Science china(Technological Sciences) 2009年第6期52卷 1730-1734页

作者： DENG XiangYun1,2,LI DeJun1,LI JianBao2,WANG XiaoHui3 & LI LongTu3 1 College of physics and Electronic Information,Tianjin Normal university,Tianjin 300387,china 2 Materials and Chemical engineering Institute,Key Laboratory for Hainan Advantage Resources and Applied Technology in Chemical engineering Material of Ministry of Education,Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti,Hainan university,Haikou 570228,china 3.department of Materials Science and engineering,tsinghua university,beijing 100084,china Materials and Chemical engineering Institute Key Laboratory for Hainan Advantage Resources and Applied Technology in Chemical Engineering Material of Ministry of Education Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Hainan U

The high-dense nanocrystalline BaTiO3(BT)ceramics with grain size smaller than 100nm have been successfully prepared by the two step sintering and the spark plasma sintering(SPS)*** successive transitions in nanograin BT ceramics from rhombohedral to orthorhombic,tetragonal and cubic transitions,similar to those in coarse BT ceramics,were revealed by in-situ temperature dependent Raman *** multiphase coexistence and the diffused phase transition character were demonstrated in the 8nm nanocrystalline BT ceramics.

关键词： nanocrystalline BaTiO3 ceramics preparation microstructure size effect

Latest cosmological constraints on Cardassian expansion models including the updated gamma-ray bursts

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Research in Astronomy and astrophysics 2011年第9期11卷 1019-1030页

作者： Nan Liang Pu-Xun Wu Zong-Hong Zhu department of Astronomy Beijing Normal University Beijing 100875 China center for High Energy physics Peking University Beijing 100871 China center of Nonlinear Science and department of physics Ningbo University Ningbo 315211 China

We constrain the Cardassian expansion models from the latest observa- tions, including the updated Gamma-ray bursts （GRBs）, which are calibrated using a cosmology independent method from the Union2 compilation of type Ia supernovae （SNe Ia）. By combining the GRB data with the joint observations from the Union2 SNe Ia set, along with the results from the Cosmic Microwave Background radia- tion observation from the seven-year Wilkinson Microwave Anisotropy Probe and the baryonic acoustic oscillation observation galaxy sample from the spectroscopic Sloan Digital Sky Survey Data Release. we find significant constraints on the model oarameters of the original Cardassian model ΩM0=0.282-0.014^0.015,n=0.03-0.05^＋0.05 and n=-0.16-3.26^＋0.25,β=0.76-0.58^＋0.34 of the modified polytropic Cardassian model, which are consistent with the ACDM model in a l-or confidence region. From the reconstruction of the deceleration parameter q（z） in Cardassian models, we obtain the transition redshift ZT = 0.73 ± 0.04 for the original Cardassian model and ZT = 0.68 ± 0.04 for the modified polytropic Cardassian model.

关键词： gamma-rays bursts -- cosmology cosmological parameters

The size effect on transport properties of colossal magnetoresistance materials La_(0.67)Ca_(0.33)MnO_3

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Science china(physics,Mechanics & Astronomy) 2008年第3期51卷 251-257页

作者： LI PeiGang1,2,LEI Ming1,2,GUO YanFeng2,GUO Xi2,CHEN LeiMing2, TANG WeiHua1,2,SONG PengYun3 & CHEN JinPing3 1 department of physics,center for Optoelectronics Materials and Devices,Zhejiang Sci-Tech university,Hangzhou 310018,china 2 National Laboratory for Condensed Matter physics,Institute of physics,Chinese Academy of Sciences,beijing 100080,china 3.department of physics,Peking university,beijing 100875,china department of physics Center for Optoelectronics Materials and Devices Zhejiang Sci-Tech University Hangzhou China National Laboratory for Condensed Matter physics Institute of Physics Chinese Academy of Sciences Beijing China department of physics Peking University Beijing China

High quality La0.67Ca0.33MnO3 (LCMO) film was deposited via a novel pulsed electron deposition technique on SrTiO3(100) single crystal substrate. The micro-bridge with different widths was fabricated by using electron beam lithography (EBL) technique and their transport properties were studied. For the micro-bridges with width of 2 and 1.5 μm,the insulator-to-metal transition temperature (TP) keeps un-changed compared with the film. For the micro-bridges with width of 1 μm,the TP shifts towards the lower temperature by 50 K. When the width decreases down to 500 nm,the insulator-to-metal transition disappears. The magnetoresistance be-havior of these micro-bridges was studied,and the results show that the low field magnetoresistance (LFMR) decreases and the high field magnetoresistances (HFMR) keep almost unchanged as the width of micro-bridge is reduced.

关键词： colossal magnetoresistance pulsed electron deposition electron beam lithography electrical transport properties

The principle of relativity, kinematics and algebraic relations

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Science china(physics,Mechanics & Astronomy) 2010年第4期53卷 591-597页

作者： GUO HanYing1, HUANG ChaoGuang2,3, WU HongTu4 & ZHOU Bin5 1Institute of Theoretical physics, Chinese Academy of Sciences, beijing 100190, china 2Institute of High Energy physics, Chinese Academy of Sciences, beijing 100049, china 3Theoretical physics center for Science Facilities, Chinese Academy of Sciences, beijing 100049, china 4department of Mathematics, Capital Normal university, beijing 100048, china 5department of physics, beijing Normal university, beijing 100875, china Chinese Academy of Sciences Institute of Theoretical Physics Beijing China (GRID:grid.9227.e) (ISNI:***) Chinese Academy of Sciences Institute of High Energy Physics Beijing China (GRID:grid.9227.e) (ISNI:***) Chinese Academy of Sciences Theoretical Physics Center for Science Facilities Beijing China (GRID:grid.9227.e) (ISNI:***) Capital Normal university Department of Mathematics Beijing China (GRID:grid.253663.7) (ISNI:***) beijing Normal university Department of Physics Beijing China (GRID:grid.20513.35) (ISNI:***)

Based on the relativistic principle and the postulate of universal invariant constants (c, l), all kinematic symmetries can be set up as the subsets of the Umov-Weyl-Fock-Hua transformations for the inertial motions. ... 详细信息

关键词： principle of relativity with (c l) Umov-Weyl-Fock-Hua transformations kinematics special relativity triple