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Digital simulation of 3D turbulence wind field of Sutong Bridge based on measured wind spectra

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第2期13卷 91-104页

作者： Hao WANG Zhou-hong zong Ai-qun LI Teng TONG Jie NIU Wen-ping DENG Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education Southeast UniversityNanjing 210096China Key Laboratory of Environmental Impact and Structural Safety in Engineering China University of Mining&TechnologyXuzhou 221116China

Time domain analysis is an essential implement to study the buffeting behavior of long-span bridges for it can consider the non-linear effect which is significant in long-span bridges. The prerequisite of time domain analysis is the accurate description of 3D turbulence winds. In this paper, some hypotheses for simplifying the 3D turbulence simulation of long-span cable-stayed bridges are conducted, considering the structural characteristics. The turbulence wind which is a 3D multivariate stochastic vector process is converted into four independent 1D univariate stochastic processes. Based on recorded wind data from structural health monitoring system (SHMS) of the Sutong Bridge, China, the measured spectra expressions are then presented using the nonlinear least-squares fitting method. Turbulence winds at the Sutong Bridge site are simulated based on the spectral representation method and the Fast Fourier transform (FFT) technique, and the relevant results derived from target spectra including measured spectra and recommended spectra are compared. The reliability and accuracy of the presented turbulence simulation method are validated through comparisons between simulated and target spectra (measured and recommended spectra). The obtained turbulence si-mulations can not only serve further analysis of the buffeting behavior of the Sutong Bridge, but references for structural anti-wind design in adjacent regions.

关键词： Turbulence simulation Spectral representation method Fast Fourier transform (FFT) Cable-stayed bridges Struc-tural health monitoring system (SHMS) Power spectral density

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Unquenched Effects and Quark Mass Dependence of Lattice Gluon Propagator in Infrared Region

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Communications in Theoretical Physics 2008年第7期50卷 125-128页

作者： ZHANG Yan-Bin PING Jia-Lun LV Xiao-Fu zong hong-Shi Department of Physics Nanjing University Nanjing 210093 China Joint Center for Particle Nuclear Physics and Cosmology Nanjing 210093 China Department of Physics Nanjing Normal University Nanjing 210097 China Department of Physics Sichuan University Chengdu 610064 China

In this paper, the gluon propagator in Landau gauge has been studied on a lattice, including the quenched and the unquenched one. The small geometry size of lattice we use is 16^3 × 32, and the big one is 20^3 × 64. For the quenched approximation, we fit the numerical results and give a little different fitting values. We also obtain unquenched effects by comparing the gluon propagator resulting from the quenched and unquenched configurations, for both the two-flavor and three-flavor cases. For the unquenched configurations, an obvious quark mass dependence has not been found in the small quark mass case, but is found in the three-flavor case when the quark mass is big.

关键词： lattice gluon propagator quenching effect mass dependence infrared region

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QCD phase diagram at finite isospin and baryon chemical potentials with the self-consistent mean field approximation

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Chinese Physics C 2021年第6期45卷 141-148页

作者： Zu-Qing Wu Jia-Lun Ping hong-Shi zong Department of Physics Nanjing UniversityNanjing 210093China Department of Physics Nanjing Normal UniversityNanjing 210023China Nanjing Proton Research and Design Center Nanjing 210093China Department of Physics Anhui Normal UniversityWuhu 241000China

The self-consistent mean field approximation of the two-flavor NJL model,with a free parameter a to reflect the competition between the"direct"channel and the"exchange"channel,is employed to study the QCD phase structure at finite isospin chemical potentialμr,finite baryon chemical potentialμB and finite temperature T,and especially to study the location of the QCD critical *** results show that in order to match the corres-ponding lttice results of isospin density and energy density,the contributions of the"exchange"channel need to be considered in the framework of the NJL model,and a weighting factorα=0.5 should be *** is also found that for fixed isospin chemical potentials,the lower temperature of the phase transition is obtained with increasing a in the T-μplane,and the largest difference of the phase transition temperature with differentα's appears atμ1~***μ=0 the temperature of the QCD critical end point(CEP)decreases with increasing r,while the critical baryon chemical potential *** high isospin chemical potential(μr=500 MeV),the temperature of the QCD tricritical point(TCP)increases with increasing a,and in the low temperature regions the system *** from the pion superfluidity phase to the normal phase asμB *** low density,the critical temperature of the QCD phase transition with differentα's rapidly increases withμ1 at the beginning,and then increases smoothly aroundμ1>300 *** the high baryon density region,the increase of the isospin chemical potential will raise the critical baryon chemical potential of the phase transition.

关键词： QCD phase transition strong interaction nuclear matter

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An exceptional case of myelodysplastic syndrome with myelofibrosis following combination chemotherapy for squamous cell lung cancer

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Cancer Biology & Medicine 2013年第2期10卷 117-120页

作者： Yi-Hao Wang Rong Fu zong-hong Shao Department of Hematology Tianjin Medical University General Hospital

A 60-year-old woman with squamous cell carcinoma in the right lung was successfully treated with four cycles of combination chemotherapy after surgery, and complete remission was achieved. However, the patient developed myelodysplastic syndrome (MDS) RAEB-2 with myelofibrosis after remission, possibly because of chemotherapy or DNA methylation. The patient responded well to dacitabine (Dacogen), suggesting that DNA hypomethylation agents can be a promising therapy to retard the progression of a second tumor or carcinoma.

关键词： DNA methylation myelodysplastic syndrome myelofibrosis squamous cell lung cancer

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Biosensor Based on TTF@SiO_2 Nanoparticles as Electron Transfer Mediator for the Determination of Glucose

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Chemical Research in Chinese Universities 2006年第4期22卷 474-478页

作者： LI Xiao-hua XIAN Yue-zhong MIN hong LI Chen-xin XIE zong-hong ZHANG Fen-fen JIN Li-tong Department of Chemistry East China Normal University Shanghai 200062 P. R. China

Tetrathiafulvalene（TTF） was doped in an SiO2 network and the resulting nanocompesite was used as a mediator for the selective detection of glucose. The uniform TTF-doped silica（TIT@SiO2 ） nanoparticles were prepared by the water-in-oil（W/O） microemulsion method, and were characterized by transmission electron microscopy（TEM）. The core-shell structure TTF@ SiO2 could prevent TIT from leaching out into an aqueous solution. Combined with chitosan （CHIT）, which serves as a scaffold for glucose oxidase and nanocomposite immobilization, the GCE/TTF@ SiO2- CHIT-GOx biosensor was developed. Under optimal conditions, the biosensors exhibit a linear range of 1.0 × 10^-5 5 × 10^-3 mol/L with a detection limit down to 5.0 μmol/L（S/N = 3 ）. The excellent selectivity, sensitivity, and stability of the glucose biosensor show its potential for practical applications.

关键词： TTF@ SiO2 nanoparticle Chitosan Glucose Biosensor

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An Improved Quasi-particle Model Framework for Quark-Gluon Plasma from the Path Integral Formalism

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Chinese Physics Letters 2012年第6期29卷 86-89页

作者： CAO Jing ZHAO A-Meng SUN Wei-Min zong hong-Shi Department of Physics Nanjing UniversityNanjing 210093 Joint Center for Particle Nuclear Physics and CosmologyNanjing 210093

An improved framework for the quasi-particle model is *** the previous approach of establishing the quasi-particle model,we introduce a classical background field (it is allowed to depend on temperature) to deal with the infinity of thermal vacuum energy which exists in previous quasi-particle *** taking into account the effect of this classical background field,the partition function of the quasi-particle system can be well *** on this and following the standard ensemble theory,we construct a thermodynamically consistent quasi-particle model without the need to reformulate the statistical mechanics or the thermodynamic consistency *** is shown that our method is general and can be generalized to the case in which the effective mass depends not only on the temperature but also on the chemical potential.

关键词： particle quasi infinity

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Discussion of thermodynamic features within the PNJL model

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Chinese Physics C 2018年第12期42卷 32-43页

作者： Jin-Li Zhang Cheng-Ming Li hong-Shi zong Department of Physics Nanjing UniversityNanjing 210093China Joint Center for Particle Nuclear Physics and CosmologyNanjing 210093China 2.State Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsCASBeijing 100190China

We discuss some thermodynamical features of a QCD system within the two-flavor Polyakov loop ex- tended Nambu Jona-Lasinio （PNJL） model. Several thermodynamical quantities of interest （pressure, energy density, specific heat, speed of sound, etc.） are investigated and discussed in detail with two different forms of Polyakov loop potential. The effective coupling strength G incorporating a quark feedback （quark condensate） through operator product expansion is also discussed, as well as the relationship between color deconfinement and chiral phase crossover. We find that some thermodynamical quantities have quite different behavior for different Polyakov loop potentials. By changing the characteristic temperature To of the pure Yang-Mills feld, we find that when To becomes small, color deconfinement might happen earlier than chiral phase crossover, while their relationship can be determined via some thermodynamical quantities. Furthermore, the behavior of the thermodynamical quantities is quite different in the two different forms of Polyakov loop potential studied. Especially, one of the potentials, specific heat, has two peaks, which correspond to color deconfinement and chiral phase crossover respectively. This interesting phenomenon may shed some light on whether the inflection points at the same temperature or not for lattice QCD and of the chiral condensate and deconfinement transitions happen experimental studies.

关键词： deconfinement specific heat transition temperature

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Robustness of the Sunyaev-Zel’dovich Effect as a Measure of the Hubble Constant

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Chinese Physics Letters 2001年第4期18卷 622-624页

作者： CAO Li ZHANG Yuan-Zhong ZHU zong-hong Beijing Astronomical Observatory Chinese Academy of SciencesBeijing 100012 National Astronomical Observatories Chinese Academy of SciencesBeijing 100012 Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100080

After inversing the x-ray surface brightness of the cooling flow cluster Abell 1689 through the isothermal β model,the isothermal double β model and the x-ray surface brightness distribution model derived from the universal dark matter density profile,we calculate the electron distribution and the Sunyaev-Zel'dovich(SZ)effect of the *** resulting temperature decrements,which are inversely proportional to the square root of H0,are very different for the three models,with uncertainty of 15%.Thus,the SZ/x-ray route can not be taken as a precise measurement of H0 until further observations(*** the satellite AXAF)constrain well the amount and distribution of cluster gas.

关键词： distribution cluster isothermal

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骨髓增生异常综合征CD34+细胞焦亡相关分子焦孔素E研究

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中国实用内科杂志 2024年第1期44卷 68-74页

作者：任晓彤余顺杰郭欣雨刘召云邵宗鸿付蓉李丽娟天津医科大学总医院血液科天津市骨髓衰竭及癌性造血克隆防治重点实验室天津300052

目的探讨骨髓增生异常综合征(MDS)患者骨髓CD34+细胞中焦孔素E(GSDME)与胱天蛋白酶-3(Caspase-3)表达水平。方法选取2020年9月至2021年12月在天津医科大学总医院血液科收治的32例初治MDS患者与20例正常者对照,利用流式细胞术、qRT-PCR... 详细信息

目的探讨骨髓增生异常综合征(MDS)患者骨髓CD34+细胞中焦孔素E(GSDME)与胱天蛋白酶-3(Caspase-3)表达水平。方法选取2020年9月至2021年12月在天津医科大学总医院血液科收治的32例初治MDS患者与20例正常者对照,利用流式细胞术、qRT-PCR技术检测骨髓CD34+细胞中GSDME与Caspase-3表达水平。结果流式细胞术结果显示:初治低危组骨髓CD34+细胞中GSDME与活化Caspase-3的表达水平[(64.90±15.74)%与(31.83±17.99)%]显著高于对照组[(41.39±14.07)%与(24.11±16.28)%,P<0.05]。初治高危组GSDME与活化Caspase-3的表达水平[(30.69±14.62)%与(15.42±13.34)%]显著低于对照组与初治低危组(P<0.05)。qRT-PCR结果显示:高危MDS患者骨髓CD34+细胞GSDME基因相对表达量低于对照组(0.20±0.19比1.00±0.53,P<0.05),但Caspase-3基因相对表达量无明显差别。结论低危MDS患者骨髓CD34+细胞内GSDME表达水平升高,细胞焦亡水平可能升高,导致骨髓造血衰竭;高危MDS患者骨髓CD34+细胞内GSDME表达水平降低,细胞焦亡水平可能降低,细胞过度增殖,向白血病转化的风险更大。

关键词：骨髓增生异常综合征细胞焦亡焦孔素E 胱天蛋白酶-3

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QCD Sum Rule External Field Approach and Vacuum Susceptibilities

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Communications in Theoretical Physics 2002年第10期38卷 475-482页

作者： zong hong-Shi PING Jia-Lun CHANG Chao-His WANG Fan ZHAO En-Guang Department of Physics Nanjing University Nanjing 210093 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China Department of Physics Nanjing Normal University Nanjing 210097 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China Institute of Theoretical Physics Academia Sinica P.O. Box 2735 Beijing 100080 China Department of Physics Nanjing University Nanjing 210093 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China Institute of Theoretical Physics Academia Sinica P.O. Box 2735 Beijing 100080 China

Based on QCD sum rule three-point and two-point external field formulas respectively, the vector vacuumsusceptibilities are calculated at the mean-field level in the framework of the global color symmetry model. It is shownthat the above two approaches of determination of the vector vacuum susceptibility may lead to different results. Thereason of this contradiction is discussed.

关键词： nonperturbative methods in QCD, global color symmetry model

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