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Implications on the origin of cosmic rays in light of 10 TV spectral softenings

Frontiers of physics 2020年第2期15卷 101-109,F0004页

作者： Cliuan Yue Peng-Xiong Ma Qiang Yuan Yi-Zhong Fan Zhan-Fang Chen ming-Yang Cui Hao-Ting Dai Tie-Kuang Dong Xiaoyuan Huang Wei Jiang Shi-Jun Lei Xiang Li cheng-ming liu Hao liu Yang liu Chuan-Ning Luo Xu Pan Wen-Xi Peng Rui Qiao Yi-Feng Wei Li-Bo Wu Zhi-Hui Xu Zun-Lei Xu Guan-Wen Yuan Jing-Jing Zang Ya-Peng Zhang Yong-Jie Zhang Yun-Long Zhang Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210033China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China Center for High Energy Physics Peking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Institute of Modem Physics Chinese Academy of SciencesLanzhou 730000China

Precise measurements of the energy spectra of cosmic rays(CRs)show various kinds of features deviating from single power-laws,which give very interesting and important implications on their origin and *** measurements from a few balloon and space experiments indicate the existence of spectral softenings around 10 TV for protons(and probably also for Helium nuclei).Very recently,the DArk Matter Particle Explorer(DAMPE)measurement about the proton spectrum clearly reveals such a softening with a high *** we study the implications of these new measurements,as well as the groundbased indirect measurements,on the origin of *** find that a single component of CRs fails to fit the spectral softening and the air shower experiment data *** the framework of multiple components,we discuss two possible scenarios,the multiple source population scenario and the background plus nearby source *** scenarios give reasonable fits to the wide-band data from TeV to 100 PeV *** the anisotropy observations,the nearby source model is favored.

关键词： cosmic rays

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Effects of ultrasonic treatment on microstructures of AZ91 alloy

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Transactions of Nonferrous Metals Society of China 2014年第1期24卷 76-81页

作者：杨跃双王锦程王陶刘成明张忠明西北工业大学凝固技术国家重点实验室西安710072 西安理工大学材料学院西安710048

Effects of ultrasonic treatment on microstructures were investigated by introducing the ultrasonic oscillation into AZ91 alloy melts. The results show that the ultrasonic treatment does not change the phase composition but has great influence on solidification microstructures. The area percentage of lamellar eutectic phase increases to the maximum when the applied ultrasonic power is increased to 600 W and then decreases gradually with the further increase of power;meanwhile, the average area of Al8Mn5 phase owns a completely opposing variation trend. The area percentage of Mg17Al12 decreases gradually with increasing the applied ultrasonic power. Mechanisms accounted for the refinement and fraction of different intermetallic phases were also discussed.

关键词： AZ91alloy ultrasonic treatment microstructure

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A Vehicle Traveling Time Prediction Method Based on Grey Theory and Linear Regression Analysis

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Journal of Shanghai Jiaotong university(Science) 2009年第4期14卷 486-489页

作者：屠珺李彦明刘成良 Institute of Electromechanical Control and Logistics Equipment Shanghai Jiaotong University

Vehicle traveling time prediction is an important part of the research of intelligent transportation system. By now, there have been various kinds of methods for vehicle traveling time prediction. But few consider both aspects of time and space. In this paper, a vehicle traveling time prediction method based on grey theory （GT） and linear regression analysis （LRA） is presented. In aspects of time, we use the history data sequence of bus speed on a certain road to predict the future bus speed on that road by GT. And in aspects of space, we calculate the traffic affecting factors between various roads by LRA. Using these factors we can predict the vehicle＇s speed at the lower road if the vehicle＇s speed at the current road is known. Finally we use time factor and space factor as the weighting factors of the two results predicted by GT and LRA respectively to find the final result, thus calculating the vehicle＇s traveling time. The method also considers such factors as dwell time, thus making the prediction more accurate.

关键词： intelligent transport system linear regression analysis (LRA) grey theory (GT)

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Research of the Ancient Sea Rock-The Natural Mineral Enzyme Function Water

Research of the Ancient Sea Rock-The Natural Mineral Enzyme ...

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2012 China Functional Materials Technology and Industry Forum

作者： ming-cheng liu Qing-shan Li Pei-jing Wang Longlong Guan Wei Hong State Key Laboratory of Metastable Materials Science and Technology Yanshan University

In this paper,the micro-nano powder of ancient Sea rock was used as core material to filter tap *** this method,the healthy-drinking water has been prepared successfully with the property of weak alkaline,small molecule clusters,rich of trace elements contributing to health. Its properties were characterized by high-resolution superconducting NMR spectrometer, inductively-coupled plasma spectrometer,far infrared radiation rate tester,pH acidity meter and redox potential *** results showed that the pH value of this water was 7.2～7.8,and the region of ORP was 124mV;FWHM of O-NMR spectrum was 56.39Hz,It is a kind of water with small molecules;It also contains a variety of macro and micro elements which human needed;The filtered water is beneficial to human health and longevity with a good immune function.

关键词： Ancient Sea rock Function water Health Longevity

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Advances in nuclear detection and readout techniques

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Nuclear Science and Techniques 2023年第12期34卷 281-358页

作者： Rui He Xiao‑Yang Niu Yi Wang Hong‑Wei Liang Hong‑Bang liu Ye Tian Hong‑Lin Zhang Chao‑Jie Zou Zhi‑Yi liu Yun‑Long Zhang Hai‑Bo Yang Ju Huang Hong‑Kai Wang Wei‑Jia Han Bei Cao Gang Chen Cong Dai Li‑Min Duan Rui‑Rui Fan Fang‑Fa Fu Jian‑Hua Guo Dong Han Wei Jiang Xian‑Qin Li Xin Li Zhuo‑Dai Li Yu‑Tie Liang Shun Liao De‑Xu Lin cheng‑ming liu Guo‑Rui liu Jun‑Tao liu Ze Long Meng‑Chen Niu Hao Qiu Hu Ran Xiang‑ming Sun Bo‑Tan Wang Jia Wang Jin‑Xiang Wang Qi‑Lin Wang Yong‑Sheng Wang Xiao‑Chuan Xia Hao‑Qing Xie He‑Run Yang Hong Yin Hong Yuan Chun‑Hui Zhang Rui‑Guang Zhao Ran Zheng cheng‑Xin Zhao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000China Key Laboratory of Particle and Radiation Imaging Department of Engineering PhysicsTsinghua UniversityBeijing 100084China School of Integrated Circuits Dalian University of TechnologyDalian 116020China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Radiation Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Electronic Engineering School Heilongjiang UniversityHarbin 150080China Spallation Neutron Source Science Center Dongguan 523803China Micro‑electronic Department Harbin Institute of TechnologyHarbin 150001China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210034China Liaoning Academy of Materials Shenyang 110167China Istituto Nazionale di Fisica Nucleare Sezione di PerugiaPerugiaItaly School of Mathematics and Physics Chengdu University of TechnologyChengdu 620035China PLAC Key Laboratory of Quark and Lepton Physics(MOE)Central China Normal UniversityWuhan 430079China School of Electronics and Information Northwestern Polytechnical UniversityXi’an 710129China State Key Lab of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China School of Computer Science Northwestern Polytechnical UniversityXi’an 710129China

“A Craftsman Must Sharpen His Tools to Do His Job,”said *** detection and readout techniques are the foundation of particle physics,nuclear physics,and particle astrophysics to reveal the nature of the ***,they are being increasingly used in other disciplines like nuclear power generation,life sciences,environmental sciences,medical sciences,*** article reviews the short history,recent development,and trend of nuclear detection and readout techniques,covering Semiconductor Detector,Gaseous Detector,Scintillation Detector,Cherenkov Detector,Transition Radiation Detector,and Readout *** explaining the principle and using examples,we hope to help the interested reader underst and this research field and bring exciting information to the community.

关键词： Silicon detector Wide bandgap detector Time projection chamber(TPC) Multigap resistive plate chamber detector(MRPC) Scintillation detector Calorimeters Cherenkov detector Transition radiation detector Artificial intelligence Trigger-less readout

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Three-dimensional fracture of UO2 ceramic pellets by phase field modeling

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 169-180页

作者： Wei Xiong Xuan Ye Hongzhang cheng Xiaoming liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua University State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

Fracture is the primary failure type for the UO2ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional （3D） UO2ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3D crack modes in the interested time ***,we studied the relation of the 3D fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture

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面向Agent的软件工程

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计算机工程与应用 2001年第11期37卷 30-32页

作者：关旭程明刘豹天津大学管理学院天津300072

Agent技术在计算机系统的建模、设计和实现等方面有巨大的潜力，它带来的大量的新的理论与方法将大大推动软件工程领域研究的进程。文章讨论了Agent技术在计算机软件系统开发方面的优势以及存在的一些问题。

关键词：软件工程多Agent系统程序设计语言计算机

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塔式起重机3D远程虚拟监控

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上海交通大学学报 2009年第11期43卷 1689-1692,1697页

作者：李超李彦明刘成良上海交通大学机械与动力工程学院上海200240

为了向塔式起重机提供更为可靠、安全、完善的监控系统,基于虚拟现实技术研究了塔式起重机运行虚拟场景的参数化构建技术,分析了虚拟监控系统的3D裁剪算法和z缓冲算法,提出了利用DirectX技术开发虚拟场景渲染引擎,通过现场传感信息驱动... 详细信息

为了向塔式起重机提供更为可靠、安全、完善的监控系统,基于虚拟现实技术研究了塔式起重机运行虚拟场景的参数化构建技术,分析了虚拟监控系统的3D裁剪算法和z缓冲算法,提出了利用DirectX技术开发虚拟场景渲染引擎,通过现场传感信息驱动塔机动作的虚拟监控系统.实验结果表明,本监控系统不仅提高了塔式起重机工作的安全性,并且具有较高的可扩展性、真实性、实时性与稳定性.

关键词：虚拟监控远程监控信息驱动塔式起重机

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辐射状分支水平井非射孔完井方式下的产能研究

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天然气工业 2008年第2期28卷 76-78页

作者：于东熊友明补成中刘浩西南石油大学

针对分支水平井常用的完井方法,运用等值渗流阻力的原理并结合分支水平井在地层中的势分布,将分支水平井在理想井生产时产生的压降与实际非射孔完井方式下的附加压力损失结合在一起,推导出辐射状分支水平井在不同非射孔完井方式下的产... 详细信息

针对分支水平井常用的完井方法,运用等值渗流阻力的原理并结合分支水平井在地层中的势分布,将分支水平井在理想井生产时产生的压降与实际非射孔完井方式下的附加压力损失结合在一起,推导出辐射状分支水平井在不同非射孔完井方式下的产能公式。结合现场实例,将各种非射孔完井方式下的产能与理想井产能进行比较,验证了数学模型的正确性,并指出在设计分支井钻井完井时,应当结合实际情况考虑地层损害和完井方式对产能的影响。

关键词：辐射分支水平井射孔完井压力产能

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Observation of topological charge transformations in acoustic vortex using passive periodic systems

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao Chen Xie liu Changqing Xu Da-Jian Wu Ying cheng Xiao-Jun liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure

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