检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

高能微观世界开拓者

财新周刊 2024年第40期 96-96页

作者：李新乔李海波中国科学院高能物理研究所

2024年10月4日,杰出的实验物理学家、新中国粒子物理和核物理实验的开拓者之一叶铭汉在北京逝世,享年99岁。叶铭汉家学渊源,其叔父叶企孙创建了清华大学物理系,是著名物理学家、中国近代物理学教育和研究的奠基人。叶铭汉自幼以叔父为... 详细信息

2024年10月4日,杰出的实验物理学家、新中国粒子物理和核物理实验的开拓者之一叶铭汉在北京逝世,享年99岁。叶铭汉家学渊源,其叔父叶企孙创建了清华大学物理系,是著名物理学家、中国近代物理学教育和研究的奠基人。叶铭汉自幼以叔父为人生楷模,更是在其影响下投身中国高能物理事业。

关键词：实验物理学家近代物理学著名物理学家家学渊源叶企孙叶铭汉人生楷模微观世界

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

一种改进的模拟退火算法

高等学校计算数学学报 2006年第1期28卷 15-19页

作者：王知人章胤李新乔燕山大学理学院信息与计算科学系中国科学院高能物理研究所

In this paper,we introduce the simulated annealing algorithm through discussing its theory, mathematic model, asymptotic convergence. Then we introduce a methord of improveing the simulated annealing algorithm,and use the two algorithms to assove TSP, contrast the improving algorithm to the former. At last we analyse these algorithms.

关键词： simulated annealing algorithm Markov chain entropy cooling increase chart.

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

GECAM卫星有效载荷里的硬核技术

现代物理知识 2020年第5期32卷 17-22页

作者：李新乔中国科学院高能物理研究所

个人名片:姓名:引力波暴高能电磁对应体全天监测器卫星简称:GECAM卫星籍贯:中国科学院(工程总体单位:国家空间科学中心;卫星总体单位:微小卫星创新研究院;项目提出及科学载荷研制单位:高能物理研究所)体貌特征:双子星、微纳卫星、多目...

个人名片:姓名:引力波暴高能电磁对应体全天监测器卫星简称:GECAM卫星籍贯:中国科学院(工程总体单位:国家空间科学中心;卫星总体单位:微小卫星创新研究院;项目提出及科学载荷研制单位:高能物理研究所)体貌特征:双子星、微纳卫星、多目星君入星志愿:对引力波伽马暴、快速射电暴、磁星爆发等高能天文事件开展高灵敏、高性能探测出星年月:2020年12月出星地:西昌卫星发射中心

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

我们为何仰望星空

现代物理知识 2020年第6期32卷 26-34页

作者：李新乔中国科学院高能物理研究所

人静更初,月沉西去,小儿偷入庭中。举目巡天望,满院繁星。银汉斜横南北,河两岸、郎女难逢。东天上,英仙跨马,擎起苍鹰。极空,化出仙后,华冠紫金衣,护驾双熊。瞬而西南暗,将隐长庚。星月轮番登场,人亦是、十载河东。青云涌,天龙显鳞,四...

人静更初,月沉西去,小儿偷入庭中。举目巡天望,满院繁星。银汉斜横南北,河两岸、郎女难逢。东天上,英仙跨马,擎起苍鹰。极空,化出仙后,华冠紫金衣,护驾双熊。瞬而西南暗,将隐长庚。星月轮番登场,人亦是、十载河东。青云涌,天龙显鳞,四宇飞腾。这首《凤凰台上忆吹箫·望星空》是我数年前所填。从中也引出一个问题:我们为何仰望星空?我想,每个人都有着各自的答案。有人说:星空很神秘,我们仰望星空可以畅想未知的力量。有人说:从小就养成了看星星的习惯,看着满天星斗,

关键词：

利用GECAM卫星Crab脉冲星观测数据的定轨分析

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

航空学报 2023年第3期44卷 100-108页

作者：韩大炜郑世界庹攸隶葛明玉宋黎明李新乔文向阳熊少林中国科学院高能物理研究所粒子天体物理重点实验室北京100049

怀柔一号引力波暴高能电磁对应体全天监测器(GECAM)卫星是中国探测引力波暴(GWBs)、快速射电暴(FRBs)和伽马射线暴(GRBs)等暴发现象高能电磁对应体的空间天文卫星。得益于使用硅光电倍增器代替传统器件的创新设计,GECAM在具有很高的时... 详细信息

怀柔一号引力波暴高能电磁对应体全天监测器(GECAM)卫星是中国探测引力波暴(GWBs)、快速射电暴(FRBs)和伽马射线暴(GRBs)等暴发现象高能电磁对应体的空间天文卫星。得益于使用硅光电倍增器代替传统器件的创新设计,GECAM在具有很高的时间分辨率(0.1μs)、绝对时间精度(~3μs)和很广视场的同时大幅减轻了重量。利用GECAM卫星的Crab观测数据,基于轨道动力学模型和脉冲星脉冲轮廓显著性分析的定轨算法(SEPO)开展了单脉冲星的定轨验证。结果表明该算法能实现对GECAM卫星B卫星的轨道进行定轨,利用40天的在轨观测数据可得定轨精度(99.7%置信度)如下:轨道半长轴精度为5.85 m,偏心率精度为0.000121,轨道倾角精度为0.0131°,升交点赤经精度为0.165°,近地点幅角精度为0.216°,平近地点角精度为0.217°。试验证明了用作伽马暴监视的微小卫星也可进行脉冲星定轨,为中国未来脉冲星空间定轨和导航提供了新的思路。

关键词：怀柔一号 Crab脉冲星脉冲星导航 X射线轨道动力学

North west cape-induced electron precipitation and theoretical simulation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第11期25卷 695-705页

作者：张振霞李新乔王辰宇 Lun-Jin Chen National Earthquake Infrastructure Service China Earthquake Administration Beijing 100045 China Institute of High Energy Physics Chinese Academic Sciences Beijing 100049 China peking University Beijing 100871 China Department of Physics University of Texas at Dallas Richardson Texas USA

Enhancement of the electron fluxes in the inner radiation belt,which is induced by the powerful North West Cape（NWC） very-low-frequency（VLF） transmitter,have been observed and analyzed by several research ***,all of the previous publications have focused on NWC-induced ＆gt; 100-keV electrons only,based on observations from the Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions（DEMETER） and the Geostationary Operational Environmental Satellite（GOES） ***,we present flux enhancements with 30-100-keV electrons related to NWC transmitter for the first time,which were observed by the GOES satellite at *** to the 100-300-keV precipitated-electron behavior,the low energy 30-100-keV electron precipitation is primarily located east of the ***,the latter does not drift eastward to the same extent as the former,possibly because of the lower electron *** 30-100-keV electrons are distributed in the L = 1.8-2.1 L-shell range,in contrast to the100-300-keV electrons which are at L= *** is consistent with the perspective that the energy of the VLF-waveinduced electron flux enhancement decreases with higher L-shell *** expand upon the rationality of the simultaneous enhancement of the 30-100- and 100-300-keV electron fluxes through comparison with the cyclotron resonance theory for the quasi-linear wave-particle *** addition,we interpret the asymmetry characteristics of NWC electric power distribution in north and south hemisphere by ray tracing ***,we present considerable discussion and show that good agreement exists between the observation of satellites and theory.

关键词： transmitter GOES powerful tracing NOAA latter hemisphere publications drift simultaneous

A study of the pointed observation methods and sensitivity of HXMT

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2010年第1期34卷 66-71页

作者：金晶陈勇张双南张澍李新乔李刚 Department of Engineering Physics Tsinghua University Center for Astrophysics Tsinghua University Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Department of Physics Tsinghua University

The Hard X-ray Modulation Telescope （HXMT） is an X-ray astronomy satellite consisting of three slat-collimated instruments, the High Energy X-ray Instrument （HE）, the Medium Energy X-ray Instrument （ME）, and the Low Energy X-ray Instrument （LE）. HXMT will carry out an all sky survey and make pointed observations in the 1-250 keV energy band. In order to get the source and background fluxes simultaneously in the pointed observations, two methods, i.e., the combined field of view （FOV） method and the off-axis pointing method are proposed in this paper. Comprehensive analyses of the sensitivities of the three instruments by using these two methods are presented, respectively. It is found that the off-axis pointing method has a higher sensitivity for HE and ME but a lower sensitivity for LE. Since the axes of the three instruments are aligned along the same direction, the off-axis pointing method is recommended as the main method in the pointed observation for HXMT; the combined FOV method can be used when LE is the most relevant instrument in order to satisfy the scientific objective of the observation.

关键词： HXMT pointed observation sensitivity off-axis

Study of typical space wave–particle coupling events possibly related with seismic activity

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2014年第10期23卷 641-649页

作者：张振霞王辰宇申旭辉李新乔吴书贵 National Earthquake Infrastructure Service China Earthquake Administration School of Physics Peking University Institute of Earthquake Science China Earthquake Administration Institute of High Energy Physics Chinese Academy of Sciences

Based on the DEMETER satellite, we found two space wave-particle coupling events during February 2010 that took place in the range of the McIlwain parameter L （1.27-- 1.37）. There are strong spatial and temporal correlation between the particle bursts （PBs） and the electromagnetic disturbances of the coupling events. The two PBs show different energy spectrum characteristics, while the corresponding electromagnetic disturbances concentrated on different frequency ranges. In agreement with the prediction of the theory of wave-particle interaction, we conclude that the two wave-particle inter- actions can be probably explained as follows： one is electron-dominant precipitation with energy of 0.09 MeV,-~0.2 MeV induced by a VLF electromagnetic wave with the frequencies of 14 kHz,-20 kHz, and another is proton-dominant precip- itation with energies of 0.65 MeV--2.85 MeV induced by a VLF electromagnetic wave with the frequency of ≤ 100 Hz. For the first time, these particle bursts＇ origins, from electrons or protons detected by the Instrument for the Detection of Particles （IDP） on board, are inferred by theoretical calculation, although the instrument has no ability to identify the particle species.

关键词： particle burst VLF electric disturbance wave-particle interaction

在线全文

学校读者我要写书评

暂无评论

高能所空间探测技术发展历程

现代物理知识 2023年第S1期 224-238页

作者：李新乔马宇蒨宋黎明中国科学院高能物理研究所

一、我国空间X射线天文的先行者——神舟二号X射线探测器自20世纪六七十年代起，经历了十余年的高空科学气球研制和球载X射线天文观测实验，我国的X射线天文探测技术和科学研究得到了一定的积累和发展。到了八十年代，我国学者利用自主...

一、我国空间X射线天文的先行者——神舟二号X射线探测器自20世纪六七十年代起，经历了十余年的高空科学气球研制和球载X射线天文观测实验，我国的X射线天文探测技术和科学研究得到了一定的积累和发展。到了八十年代，我国学者利用自主研发的球载X射线探测设备对蟹状星云、天鹅座X-1等天体开展了卓有成效的观测，取得了宝贵的一手数据。

关键词：