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Properties of collective flow and pion production in intermediate-energy heavy-ion collisions with a relativistic quantum molecular dynamics model

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Nuclear Science and Techniques 2024年第1期35卷 155-169页

作者： Si-Na Wei zhao-qing Feng School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China

The relativistic mean-field approach was implemented in the Lanzhou quantum molecular dynamics transport model(***). Using the ***, the properties of collective flow and pion production were investigated systematically for nuclear reactions with various isospin asymmetries. The directed and elliptic flows of the *** are able to describe the experimental data of STAR Collaboration. The directed flow difference between free neutrons and protons was associated with the stiffness of the symmetry energy, that is, a softer symmetry energy led to a larger flow difference. For various collision energies, the ratio between the π^(-) and π^(+) yields increased with a decrease in the slope parameter of the symmetry energy. When the collision energy was 270 MeV/nucleon, the single ratio of the pion transverse momentum spectra also increased with decreasing slope parameter of the symmetry energy in both nearly symmetric and neutron-rich ***, it is difficult to constrain the stiffness of the symmetry energy with the double ratio because of the lack of threshold energy correction on the pion production.

关键词： Heavy-ion collision Collective flow Pion production Symmetry energy Relativistic mean field

THE LUMINOSITY OF A FREELY FALLING LIGHT SOURCE AND THE HAWKING TEMPERATURE

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Chinese Physics Letters 1990年第1期7卷 40-43页

作者： zhao zheng Department of Physics Beijing Normal UniversityBeijing 100875

It is proposed that the luminosity,the information and the frequency of a freely falling light source to an event horizon appear to the observer resting with respect to the horizon to decrease exponentially with a time scale which depends on the temperature of the *** conclusion is valid not only for the Schwarzschild black hole,but also for the other black holes,the Rindler horizon,and the deSitter horizon.

关键词： horizon source black

HPV16E6/E7融合蛋白疫苗与放疗联合应用治疗宫颈癌的实验研究

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中国肿瘤生物治疗杂志 2005年第1期12卷 19-22页

作者：周小山千新来陆元志刘巧赵清正中国协和医科大学中国医学科学院肿瘤医院肿瘤研究所生物化学与分子生物学实验室北京100021

目的:观察人乳头瘤病毒16型(HPV)E6/E7融合蛋白疫苗与放疗(12Gy)联合应用对宫颈癌的治疗效果。方法:24只雌性C57BL/6小鼠右侧后肢接种肿瘤细胞后7d,随机分为4组:对照组(C,n=6);免疫组(IM,n=6);放疗组(RA,n=6);联合治疗组(IM+RA,n=6)。... 详细信息

目的:观察人乳头瘤病毒16型(HPV)E6/E7融合蛋白疫苗与放疗(12Gy)联合应用对宫颈癌的治疗效果。方法:24只雌性C57BL/6小鼠右侧后肢接种肿瘤细胞后7d,随机分为4组:对照组(C,n=6);免疫组(IM,n=6);放疗组(RA,n=6);联合治疗组(IM+RA,n=6)。比较各组小鼠的肿瘤生长速度及存活时间。采用TUNEL法对小鼠肿瘤组织中细胞的凋亡情况进行检测。结果:IM+RA组小鼠肿瘤生长速度较慢,平均存活时间明显长于RA、IM及C组,IM组与C组动物的平均存活时间没有差异。TUNEL实验结果表明,IM+RA组小鼠肿瘤组织中凋亡细胞明显高于其他各组。结论:HPV16E6/E7融合蛋白疫苗与放疗联合应用,具有协同抗肿瘤作用。

关键词：人乳头瘤病毒16型免疫治疗放疗宫颈癌

21例腹腔镜胆囊切除术后早期黄疸的原因及处理

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微创医学 2006年第4X期1卷 257-259页

作者：何仕青赵强李铮宇彭北生广东省台山市人民医院普通外科台山529200

目的探讨腹腔镜下胆囊切除术后早期黄疸（术后1周内出现）的发生原因及处理方法。方法对我院1997年12月至2005年12月之间895例腹腔镜下胆囊切除术资料进行回顾性分析。结果 893例中有21例术后出现早期黄疸，占2．3％；其中肝外胆管残... 详细信息

目的探讨腹腔镜下胆囊切除术后早期黄疸（术后1周内出现）的发生原因及处理方法。方法对我院1997年12月至2005年12月之间895例腹腔镜下胆囊切除术资料进行回顾性分析。结果 893例中有21例术后出现早期黄疸，占2．3％；其中肝外胆管残留结石11例，钛夹部分夹闭胆总管4例。保守治疗治愈17例，手术4例。结论腹腔镜下胆囊切除术后早期黄疽原因众多，主要身残留结石，其次为腔镜技术性原因致胆管损伤，大部分可经保守治疗治愈。

关键词：腔镜胆囊切除早期黄疸残留结石

Bowel preparation before colonoscopy: Consequences, mechanisms, and treatment of intestinal dysbiosis

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World Journal of Gastroenterology 2025年第2期31卷 13-26页

作者： Ze-Long zheng qing-Fan zheng Li-Qiang Wang Yi Liu Department of Gastroenterology(Endoscopy Center) China-Japan Union Hospital of Jilin UniversityChangchun 130033Jilin ProvinceChina

The term“gut microbiota”primarily refers to the ecological community of various microorganisms in the gut,which constitutes the largest microbial community in the human *** adequate bowel preparation can improve the results of colonoscopy,it may interfere with the gut *** preparation for colonoscopy can lead to transient changes in the gut microbiota,potentially affecting an individual’s health,especially in vulnerable populations,such as patients with inflammatory bowel ***,measures such as oral pro-biotics may ameliorate these adverse *** focused on the bowel prepa-ration-induced changes in the gut microbiota and host health status,hypothesized the factors influencing these changes,and attempted to identify measures that may reduce dysbiosis,thereby providing more information for individualized bowel preparation for colonoscopy in the future.

关键词： Bowel preparation Colonoscopy Microbiota Inflammatory bowel disease Probiotics

Review:Recent advances in the artificial endocrine system

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第3期12卷 171-183页

作者： qing-zheng XU Lei WANG School of Computer Science and Engineering Xi'an University of Technology Xi'an 710048 China Xi 'an Communication Institute Xi'an 710106 China

The artificial endocrine system (AES) is a new branch of natural computing which uses ideas and takes inspiration from the information processing mechanisms contained in the mammalian endocrine system. It is a fast growing research field in which a variety of new theoretical models and technical methods have been studied for dealing with complex and significant problems. An overview of some recent advances in AES modeling and its applications is provided in this paper, based on the major and latest works. This review covers theoretical modeling, combinations of algorithms, and typical application fields. A number of challenges that can be undertaken to help move the field forward are discussed according to the current state of the AES approach.

关键词： Artificial endocrine system (AES) Hormone Endocrine cell Artificial neural network (ANN) Artificial immune system (AIS)

Experimental study of drag reduction characteristics related to the multifactor coupling of a bionic jet surface

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Journal of Hydrodynamics 2019年第1期31卷 186-194页

作者： Yun-qing Gu Song-wei Yu Jie-gang Mou Tian-xing Fan Shui-hua zheng Gang zhao College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310014China College of Mechanical and Electrical Engineering Harbin Engineering UniversityHarbin 150001China

To study the drag reduction of a jet surface,an experiment is conducted with a gyrorotor *** aim of this study is to analyze the influence of the jet aperture,the jet angle and the rotational velocity coupled with the jet velocity on the friction torque acting on a jet surface model by using a jet surface drag reduction testing experimental *** drag reduction characteristics of the jet surface are also *** results show that the maximum drag reduction rate is attained when the jet diameter is 5 mm and the jet velocity is 1.2 m/*** influence of the jet velocity on the drag reduction rate decreases as the diameter ***,the maximum drag reduction rate can be attained when the angle of the jet is 30° and the velocity of the jet is 1.0 m/*** the jet diameter is small,the influence of the jet velocity on the drag reduction rate is small,whereas the maximum drag reduction rate is attained when the jet angle is 30° and the jet velocity is 1.0 m/*** the jet angle is 15°,the drag reduction rate fluctuation is *** maximum drag reduction rate is attained when the rotational velocity is 2 100 r/min and the jet velocity is 1.0 m/*** results show that the best scheme is A2B2D3 A maximum drag reduction rate of 8.57% can be *** effective control of the jet effect on the separation of the boundary layer demonstrates the drag reduction principle of a bionic jet surface.

关键词： Drag reduction bionic jet surface friction torque coupling experiment

Hawking Effect in 1+1 Dimensional Non-static Space-Time

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Chinese Physics Letters 1994年第10期11卷 649-652页

作者： zhao Ren zhao zheng Department of Physics Yanbei Teacher’s CollegeDatong 037000 Department of Physics Beijing Normal UniversityBeijing 100875

Hawking radiation in 1+1 dimensional non-static space-time described by the coordinates(t,r)is *** the tortoise transformation and the method of analytical continuation are *** temperature and the location of event ho... 详细信息

关键词： horizon Hawking continuation

Dynamic defenses in cyber security:Techniques,methods and challenges Author links open overlay panel

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Digital Communications and Networks 2022年第4期8卷 422-435页

作者： Yu zheng zheng Li Xiaolong Xu qingzhan zhao School of Computer and Software Nanjing University of Information Science and TechnologyNanjing210044JiangsuChina Key Laboratory for Novel Software Technology Nanjing UniversityNanjing210023JiangsuChina College of Information Science and Technology Shihezi University Geospatial Information Engineering Research CenterChina

Driven by the rapid development of the Internet of Things,cloud computing and other emerging technologies,the connotation of cyberspace is constantly expanding and becoming the fifth dimension of human ***,security problems in cyberspace are becoming serious,and traditional defense measures(e.g.,firewall,intrusion detection systems,and security audits)often fall into a passive situation of being prone to attacks and difficult to take effect when responding to new types of network attacks with a higher and higher degree of coordination and *** constructing and implementing the diverse strategy of dynamic transformation,the configuration characteristics of systems are constantly changing,and the probability of vulnerability exposure is ***,the difficulty and cost of attack are increasing,which provides new ideas for reversing the asymmetric situation of defense and attack in ***,few related works systematically introduce dynamic defense mechanisms for cyber *** related concepts and development strategies of dynamic defense are rarely analyzed and *** bridge this gap,we conduct a comprehensive and concrete survey of recent research efforts on dynamic defense in cyber ***,we firstly introduce basic concepts and define dynamic defense in cyber ***,we review the architectures,enabling techniques and methods for moving target defense and mimic *** is followed by taxonomically summarizing the implementation and evaluation of dynamic ***,we discuss some open challenges and opportunities for dynamic defense in cyber security.

关键词： Cyber security Dynamic defense Moving target defense Mimic defense