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Properties of Very Hot Nuclei from Heavy-Ion Reactions at Intermediate Energies

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Chinese Physics Letters 1997年第4期14卷 266-269页

作者： zheng yu-ming SA Ben-hao WANG Hui China Institute of Atomic Energy Beijing 102413

The liquid-gas phase transition from heavy-ion reactions at intermediate energies has been studied in the incomplete-fusion-fragmentation *** relative yields of decay modes of the projectile remnant are also analyzed and compared with the experimental *** experimental results are nicely described by the incomplete-fusion-fragmentation model.

关键词： incomplete fragmentation decay

Collective Flow of Λ Hyperons within Covariant Kaon Dynamics

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Chinese Physics Letters 2011年第9期28卷 92-95页

作者： XING Yong-Zhong ZHU yu-Lan WANG Yan-Yan zheng yu-ming Department of Physics Tianshui Normal UniversityTianshui 741000 College of Physics and Information Technology Shaanxi Normal UniversityXi'an 710062 China Institute of Atomic Energy P.O.Box 275(18)Beijing 102413

The collective flow ofΛhyperons produced in association with positively charged kaon mesons in nuclear reactions at SIS energies is studied using the quantum molecular dynamics(QMD)model within covariant kaon *** calculation indicates that both the directed and differential directed flows ofΛs are almost in agreement with the experimental *** suggest that the covariant kaon dynamics based on the chiral mean field approximation can not only explain the collective flow of kaon mesons,but also give reasonable results for the collective flow ofΛhyperons at SIS *** final−state interaction ofΛhyperons with dense nuclear matter enhances their directed flow and improves the agreement of their differential directed flow with the experimental *** influence of the interaction on theΛcollective flow is more appreciable at large rapidity or transverse momentum region.

关键词： dynamics collective directed

A Molecular Adsorbent Recycling System in Treating Posthepatectomy Acute Hepatic Failure Patients with Hepatocellular Carcinoma:a Bridge to Liver Transplantation

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Chinese Journal of Clinical Oncology 2006年第4期3卷 273-276页

作者： yu Wang Yihe Uu Weiping zheng yu ming Zhongyong Shen Orient Organ Transplant Center Tianjin First Central Hospital Tianjin 300192 China.

OBJECTIVE To evaluate the effect and safety of a Molecular Adsorbent Recycling System （MARS） in treating posthepatoectomy hepatic failure （AHF） patients surgically treated for primary hepatocellular carcinoma （HCC）. METHODS 12 AHF patients induced by resection of HCC were treated with MARS before orthotopic liver transplantation （OLT）. Their vital signs, urine volume, APACHElll and Glasgow scores were monitored. Routine laboratory blood tests, measurements of coagulatory function, liver and kidney function, serum ammonia, lactic acid and blood gas were conducted before and after treatment with MARS. All of the patients were followed up for a period of 6 months after OLT for prognosis and complication assessment. RESULTS Each patient was treated with MARS for 2-5 times （average of 3.6） with a length of 8-24 h each time. Their mean arterial blood pressure and urine volume were improved, APACHE III and Glasgow scores were better. Liver function was improved with the following alterations before and after treatment with MARS： serum ammonia （127.1±21.4 umol/L vs. 77.4±19.7 umol/L, P〈0.05）, lactic acid （6.53±0.45 mmol/L vs. 3.75± 0.40 mmol/L, P〈0.05） and total bilirubin （452.3±153.7 umol/L vs. 230.9± 115.2 umol/L, P〈0.05）. However, there was no significant change in platelet count （44.25±3.60×10^9/L vs. 43.19±8.26×10^9/L, P〉0.05） on international normalized ratio （INR）（2.74±0.50 vs. 2.82±0.60, P〉0.05）, which showed the safety of MARS. For all patients no serious adverse effects occurred during the treatment with MARS. CONCLUSION MARS is effective and safe for treatment of AHF patients with HCC, especially as a bridge to OLT when a donor organ is not available.

关键词： MARS hepatocellular carcinoma afic failure orlhotopic liver transplantation.

Kaon-Source Size in Relativistic Nucleus-Nucleus Collisions

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Chinese Physics Letters 1997年第7期14卷 510-512页

作者： zheng yu-ming CHU Zi-li Osamu Miyamura Kenji Kumagai China Institute of Atomic Energy Beijing 102413 Department of Physics Hiroshima UniversityHigashi-Hiroshima 724Japan

We analyze the two-kaon Bose-Einstein correlation in the reactions of 160A GeV/c Pb+Pb within an event generator *** apparent radius of kaon-source is *** theoretical result agrees quite well with the preliminary data... 详细信息

关键词： radius apparent Collisions

Sigma Meson Production in Nuclear Reactions

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Communications in Theoretical Physics 2008年第9期50卷 725-728页

作者： zheng yu-ming FUCHS C. SRISAWAS Pornrad FAESSLER Amand YAN yu-Peng KOBDAJ Chinorat XING Yong-Zhong China Institute of Atomic Energy P.O. Box 275（18） Beijing 102413 China Institute of Basic Physics School of Mathematics-Physics and Information Tianshui Normal University Tianshui 741000 China Institut für Theoretische Physik der Universitaet Tfibingen Auf der Morgenstelle 14 D-72076 Tübingen Germany Department of Physics Faculty of Science Naresuan University Amphoe Mueany Phitsanulok 65000 Thailand School of Physics Institute of Science Suranaree University of Technology Nakhon Ratchasima 30000 Thailand

The sigma meson production in p ＋ ^12C and p A- ^40Ca reactions at the incident energy Ep = 1.5 GeV is investigated within the Quantum Molecular Dynamics model. The simulation results indicate a distinctive A dependence of the sigma production, that is, the increase of A is followed by an increase of the production cross sections. We find that the σ meson production in proton-induced reactions is strongly medium-dependent, and the produced σ mesons decaying in a denser medium experience a stronger mass shift towards lower masses. This mass shift is an experimentally accessible observable in the final state pion pairs, which do not suffer from reabsorption by the surrounding nucleons. It is pointed out that the ratio of measured sigma cross sections as a function of the sigma invariant-mass from various reactions is a good probe to explore the existence of the σ meson in a dense nuclear environment.

关键词： sigma meson production medium modification the invariant-mass distribution nuclear reaction quantum molecular dynamics model

Influence of PPV,PRV and PRRSV on Efficacy of the Lapinized Hog Cholera Vaccine and Pathogenicity of Classical swine fever virus

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Journal of Integrative Agriculture 2012年第11期11卷 1892-1897页

作者： NING Yi-bao ZHAO yun WANG Qin FAN Xue-zheng QIN yu-ming ZHANG Guang-chuan XU Lu QIU Hui-shen WANG Zai-shi SONG Li SHEN Qing-chun ZHAO Qi-zu China National Classical Swine Fever Reference Laboratory/China Institute of Veterinary Drug Control Beijing 100081 P.R. China

Classical swine fever caused by Classical swine fever virus （CSFV） is a serious problem for swine industries in developing countries, which successful control of the disease have been relying on vaccination. However, classical swine fever still occurs in some immunized swine herds for various reasons. In this study, we conducted animal experiments to examine the influence of single or mixed infection with Porcine parvo virus （PPV）, Pseudorabies virus （PRV） and Porcine reproductive and respiratory syndrome virus （PRRSV） on the protective immunity induced by the Lapinized hog cholera virus （HCLV） vaccine and the pathogenicity of CSFV. In experiment 1, pigs were first inoculated with PPV, PRV or PRRSV, then immunized with HCLV, and finally challenged with a highly virulent CSFV Shimen strain. All of the pigs immunized with HCLV survived after the challenge, while all of the pigs in the non-immunized control group died after the challenge. The pigs in the group immunized with HCLV did not show any clinical symptoms of classical swine fever and were negative with CSFV after the challenge. The pigs infected with the non-CSFV before HCLV immunization did not display any clinical symptoms after the challenge with CSFV Shiman strain, but 11 of the 12 pigs were positive with CSFV. In experiment 2, pre-infections with PPV, PRV, and PRRSV were followed by inoculation with a low-virulence CSFV strain （CSFV 39）, and then the pigs were challenged with the CSFV Shimen strain. Infections by either PPV, PRV or PRRSV did not enhance the virulence of CSFV-39, but pigs infected by a mixture of the 3 viruses developed clinical symptoms after inoculation with CSFV-39. The mixed infection also increased mortality caused by the challenge with the CSFV Shimen strain. Together, these results showed PPV, PRV and PRRSV infections in pigs can reduce the efficacy of the HCLV vaccine and enhance the pathogenicity of CSFV, which may partly explain the immunization failure against CSFV in some swine

关键词： Lapinized hog cholera virus vaccination pathogenicity mixed infection influence

Observation of Influence of Nucleons＇ Motion on Kaons Collective Flow in Dense Medium

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Chinese Physics Letters 2010年第1期27卷 92-95页

作者：邢永忠郑玉明王艳艳张林屈世显 College of Physics and Information Technology Shaanxi Normal University Xi'an 710062 Department of Physics Tianshui Normal University Tianshui 741000 China Institute of Atomic Energy PO Box 275(18) Beijing 102413

In order to extract the information of the momentum-dependent interaction of kaons under the extreme condition, the properties of the positively charged kaons produced in a heavy ion collision are studied via a simple model which has an invariable nucleon＇s velocity. Our special attention is focused on the observation of the dependence of the kaon＇s properties on the motion of nucleons in a hot and dense nuclear environment. Starting from two kinds of kaon quasiparticle models defined in transport theories for simulating heavy ion collisions, we calculate the effective mass and potential of the K＋＇s produced in the collisions and find that these properties not only depend closely on the velocity of nucleons but the dependence varies with kaon＇s quasiparticle model. It is clearly shown that the motion of nucleons reduces the momentum of K＋＇s at a given rapidity and thus weakens the rapidity distribution of K＋＇s directed flow in realistic nuclear collisions.

关键词： Property Properties Transport Velocity Models Products Ions

Surface micro-arrays enhancing electromagnetic interference shielding of polydimethylsiloxane/multiwalled carbon nanotubes nanocomposites

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Nano Research 2025年第1期18卷 508-519页

作者： Ke Jiang Zhi Chen Ji yu Chen zheng Shan Huang ming Wang Chongqing Key Laboratory of Soft-Matter Material Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China School of Mechanics Civil Engineering and ArchitecturesNorthwestern Polytechnical UniversityXi’an 710072China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China

Herein,the electromagnetic shielding performance of surface concave-convex(SC)and zig-zag micro-arrays was studied by using a simulation prediction and a three-dimensional(3D)printing custom ***,surface stripe concaveconvex(SSC)and surface cylindrical concave-convex(SCC)micro-arrays with or without zig-zag micro-arrays are designed,and their shielding performance is simulated in multi-bands(C-,X-band).The multiwalled carbon nanotubes/polydimethylsiloxane composites(MWCNT/PDMS)with different SC structures and different electrical conductivity are molded in acrylonitrile-butadiene-styrene copolymer(ABS)molds which are printed by a 3D *** results show that the electromagnetic interference shielding effectiveness(EMI SE)of the samples can be enhanced by constructing the SC micro-arrays with zig-zag micro-arrays,and improving with the increase of conductivity and *** addition,the shielding mechanism of the SC-MWCNT/PDMS composites is investigated and discussed by an electromagnetic simulation.

关键词： surface micro-arrays electrical properties electromagnetic interference(EMI)shielding three-dimensional(3D)printing

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基于扩充E/R图的XML模式设计

北京工业大学学报 2005年第4期31卷 379-382页

作者：赵文兵郑玉明北京工业大学计算机学院北京100022

为了适应Web环境下的数据交换标准XML,实现软件工程中系统分析与设计阶段XML模式设计的规范化,研究了根据扩充的实体/联系图(E/R图)设计XML模式的规范,以XML模式树作为XML模式的数据模型,以扩充的实体/联系图(E/R图)作为现实的语义模型... 详细信息

为了适应Web环境下的数据交换标准XML,实现软件工程中系统分析与设计阶段XML模式设计的规范化,研究了根据扩充的实体/联系图(E/R图)设计XML模式的规范,以XML模式树作为XML模式的数据模型,以扩充的实体/联系图(E/R图)作为现实的语义模型,建立了在E/R图基础上的XML模式设计,探讨了E/R图中的实体、属性、联系转化为XML模式树及其组成部分的转换规则.

关键词：模式设计 XML 实体/联系图(E/R图)