检索结果-南通市图书馆

Controllability of spin 1 systems and realization of ternary SWAP gate in two spin 1 systems coupled with Ising interaction

在线全文

学校读者我要写书评

暂无评论

Science china(physics,Mechanics & Astronomy) 2010年第10期53卷 1873-1877页

作者： wang yan di yaomin wei hairui school of physics&electronic engineering Xuzhou Normal UniversityXuzhou 221116China

In this paper,we investigate the controllability of spin 1 systems and the realization of ternary *** dipole and quadrupole operators as the orthogonal basis of su(3) algebra,we discuss the controllability of one spin 1 systems and offer the concept of a complete set of control operators *** we present the controllability of two spin 1 systems coupled with Ising interaction and the transforming relations of the drift process of the *** the specific realization of the ternary SWAP gate in these systems is *** takes 9 drift processes and 25 basic control processes.

关键词： controllability spin 1 system ternary SWAP gate Ising interaction

Thermally modulated photoelectronic synaptic behavior in HfS_(2)/VO_(2) heterostructure

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第8期43卷 3798-3809页

作者： Le wang Lin wang Xiao-Yun Ye Xiong-Hu Xu Li-yan Shang Ya-wei Li Jin-Zhong Zhang Liang-Qing Zhu Zhi-Gao Hu Technical Center for Multifunctional Magneto-Optical Spectroscopy(Shanghai) Engineering Research Center of Nanophotonics&Advanced Instrument(Ministry of Education)Department of PhysicsSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Neuromorphic computing is known for its efficient computational speed,low latency,and reduced power consumption,which is considered a pivotal technology to overcome the von Neumann *** synapses are an indispensable component of neuromorphic computational artificial neural *** guarantee effective and precise processing of optical signals,it must have a high responsivity,detectivity,and the ability to adapt to various ***,a synaptic transistor based on the HfS_(2)/VO_(2) heterojunction with a responsivity of8.6×10^(3) A·W^(-1)and a detectivity of 1.26×10^(14)Jones at405 nm laser was ***,the typical synaptic behavior was successfully simulated,including postsynaptic currents(PSCs),the transition from shortterm plasticity(STP)to long-term plasticity(LTP).When VO_(2) converts from the semiconductor state to the metal state,the HfS_(2)/VO_(2) heterojunction transforms into a Schottky heterojunction from a TypeⅡheterojunction with ***'s important,the heterojunction still exhibits excellent responsivity and detectivity,as well as stability of synaptic *** addition,the classical Pavlovian conditioning experiment is simulated under different laser intensity to study the brain's associative learning *** results demonstrate that the HfS_(2)/VO_(2) heterojunction synapse exhibits significant responsivity and detectivity and is adaptable to high-temperature environments,showing great potential for neuromorphic computational applic ations.

关键词： HfS_(2) VO_(2) Phase transition Photoelectric synapse Heterojunction

The Bright Single Pulse Emission from PSR B1133+16

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第4期24卷 253-261页

作者： Jun Tan Zhi-Gang Wen Zhen wang Xue-Feng Duan Hong-Guang wang Na wang Vishal Gajjar Jian-Ping Yuan Rai Yuen Wen-Ming yan Jian-Ling Chen wei Han Hui wang Cheng-Bing Lyu Ai-Jun Dong Maths and Information Technology school Yuncheng UniversityYuncheng 044000China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China school of physics and Materials Science Guangzhou UniversityGuangzhou 510006China Space Science Laboratory University of CaliforniaBerkeley 94710USA Department of physics and electronic engineering Yuncheng UniversityYuncheng 044000China school of physics and electronic Science Guizhou Normal UniversityGuiyang 550025China

We have conducted a comprehensive investigation into the bright single pulse emission from PSR B1133+16using the Giant Metrewave Radio *** time resolution data(61μs)were obtained at a center frequency of 322 MHz with a bandwidth of 32 MHz over a continuous observation period of 7.45 hr.A total of 1082 bright pulses were sporadically detected with peak flux densities ranging from 10 to 23 times stronger than the average pulse ***,no giant pulse-like emission with a relative pulse energy larger than 10 and extremely short duration was detected,indicating that these bright pulses cannot be categorized as giant pulse *** majority of these bright pulses are concentrated in pulse phases at both the leading and trailing windows of the average pulse profile,with an occurrence ratio of approximately *** pulse energy distribution for all individual pulses can be described by a combination of two Gaussian components and a cutoff power-law with an index of α=-*** updated nulling fraction of 15.35%±0.45% was determined from the energy *** emission of individual pulses follows a log-normal distribution in peak flux density *** is imperative that regular phase drifting in bright pulse sequence is identified in both the leading and trailing components for the first *** physical mechanisms are discussed in detail to provide insights into these observations.

关键词： (stars:)pulsars:general (stars:)pulsars:individual(PSR B1133+16) methods:observational methods:data analysis

基于机械剥离制备的PEDOT:PSS/β-Ga_(2)O_(3)微米片异质结紫外光电探测器研究

在线全文

学校读者我要写书评

暂无评论

物理学报 2024年第15期73卷 172-178页

作者：宜子琪王彦明王硕隋雪石佳辉杨壹涵王德煜冯秋菊孙景昌梁红伟辽宁师范大学物理与电子技术学院大连116029 大连理工大学集成电路学院大连116024

β-Ga_(2)O_(3)具有超宽带隙(约4.9 eV)、高的击穿电场(约8 MV/cm)、良好的化学稳定性和热稳定性等优点,是一种很有前途的制备紫外光电探测器的候选材料.由于未掺杂的β-Ga_(2)O_(3)为n型导电,所以制备p型β-Ga_(2)O_(3)面临很多困难,... 详细信息

β-Ga_(2)O_(3)具有超宽带隙(约4.9 eV)、高的击穿电场(约8 MV/cm)、良好的化学稳定性和热稳定性等优点,是一种很有前途的制备紫外光电探测器的候选材料.由于未掺杂的β-Ga_(2)O_(3)为n型导电,所以制备p型β-Ga_(2)O_(3)面临很多困难,从而制约了同质PN结的开发与应用.聚(3,4-乙烯二氧噻吩)-聚苯乙烯磺酸(PEDOT:PSS)是一种p型导电聚合物,在250—700 nm有着较高的透明度,采用p型有机材料PEDOT:PSS和n型β-Ga_(2)O_(3)构成的异质结可能为PN结型光电器件的研制提供一种途径.本文利用机械剥离法从β-Ga_(2)O_(3)单晶衬底上剥离出单根β-Ga_(2)O_(3)微米片,微米片的长度为4 mm,宽度为500μm,厚度为57μm.将有机材料PEDOT:PSS涂覆在剥离出来的微米片的一侧制备出PEDOT:PSS/β-Ga_(2)O_(3)无机-有机异质结的紫外光电探测器,器件表现出典型的整流特性,而且发现器件对254 nm紫外光敏感,具有良好的自供电性能.该异质结紫外探测器的响应度和外量子效率分别为7.13 A/W和3484%,上升时间和下降时间分别为0.25 s和0.20 s.此外,3个月后器件对254 nm紫外光的探测性能并未发现明显的衰减现象.本文的相关研究工作将对研发新型紫外探测器提供了新的思路和理论基础.

关键词： β-Ga_(2)O_(3) PEDOT:PSS 异质结紫外光电探测器

CEPC Technical Design Report

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen wei Chen Xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi Ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio di Micco Ran ding Siqin dingl Yadong ding Haiyi Dong Jianin AGH university of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui university HefeiAnhui Applied physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu university Institute of ScienceVaranasi Bandirma Onyedi Eylul university Bandirma Beihang university Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing normal university Beijing Brown university ProvidenceRI Budker Institute of Nuclear physics Novosibirsk Cadi Ayyad university Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo university Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central china normal university WuhanHubei Central South university ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang digital Radio&TV Equipment Co. LtdChengduSichuan china academy of engineering physics MianyangSichuan china building materials academy Beijing china Center of Advanced Science and Technology Beijing china Institute of Atomic Energy Beijing china Jiliang university HangzhouZhejiang china Nuclear Instrument CO. LTDBeijing china university of Geosciences Beijing china university of Geosciences WuhanHubei china university of Mining and Technology XuzhouJiangsu china West normal university NanchongSichuan Chongqing university Department of PhysicsChongqing Chulalongkorn university Bangkok City university of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell university IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu university DalianLiaoning Dalian university of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East china university Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by china,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

2.3 μm nanosecond passive Q-switching of an LD-pumped Tm:YLF laser using gold nanorods as a saturable absorber

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

Frontiers of Information Technology & electronic engineering 2021年第3期22卷 312-317页

作者： Fu-yan WU Shi-qiang wang Hai-wei CHEN Hai-tao HUANG school of physics and electronic engineering Jiangsu Normal UniversityXuzhou 221116China

Developing new saturable absorbers for use in the mid-infrared region has practical significance for short-pulsed lasers and related scientific and industrial *** performance of gold nanorods(GNRs)as saturable absorbers at novel mid-infrared wavelengths needs to be evaluated even though these benefit from ultrafast nonlinear responses and broadband saturable *** Q-switching of an LD-pumped 2.3μm Tm:YLF laser using GNRs was successfully realized in this *** with an 843 ns pulse width and a 6.67 kHz repetition rate were achieved using this Q-switched *** showed that GNRs provide promising passive Q-switches for 2.3μm Tm-doped lasers.

关键词： Gold nanorods Passive Q-switching 2.3μm Tm-doped laser materials

Constraints on the kinetic energy of type-Ic supernova explosion from young PSR J1906+0746 in a double neutron star candidate

在线全文

学校读者我要写书评

暂无评论

Chinese physics B 2021年第6期30卷 721-726页

作者： Yi-yan yang Cheng-Min Zhang Jian-wei Zhang De-Hua wang school of physics and electronic Sciences Guizhou Education UniversityGuiyang 550018China CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of Sciences(CAS)Beijing 100012China Astronomy Department Beijing Normal UniversityBeijing 100875China school of physics and electronic Sciences Guizhou Normal UniversityGuiyang 550001China

So far among the nineteen pairs of detected double neutron star(DNS) systems, it is a usual fact that the first-born recycled pulsar is detected, however the youngest DNS system PSR J1906+0746, with the characteristic age of 113 kyr, is one of the three detected DNS as a non-recycled and second-born NS, which is believed to be formed by an electron capture or a low energy ultra-stripped iron core-collapse supernova(SN) explosion. The SN remnant around PSR J1906+0746 is too dim to be observed by optical telescopes, then its x-ray flux limit has been given by Chandra. A reference pulsar PSR J1509-5850 with the young characteristic age of 154 kyr was chosen as an object of comparison, which has an SN remnant observed by Chandra and is believed to be formed by iron core SN explosion. We impose a restriction on the maximum kinetic energy of electron-capture(EC) SN explosion that induces the formation of PSR J1906+0746. The estimated result is(4–8)×10^(50) erg(1 erg= 10-7 J), which is consistent with that of the published simulations of the EC process, i.e., a lower value than that of the conventional iron core SN explosion of(1–2)×10^(51) erg. As suggested, EC process for NS formation is pertained to the subluminous type Ic SN by the helium star with ONeMg core, thus for the first time we derived the kinetic energy of EC SN explosion of DNS, which may be reconciled with the recent observation of type Ic SN 2014 ft with kinetic energy of 2 × 10^(50) erg.

关键词： neutron star pulsar astrophysics high energy astrophysical phenomena

Flux density measurements for 32 pulsars in the 20 cm observing band

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2019年第7期19卷 143-150页

作者： yan-wei Xie Jing-Bo wang George Hobbs Jane Kaczmarek di Li Jie Zhang Shi Dai Andrew Cameron Lei Zhang Chen-Chen Miao Mao Yuan Shen wang Song-Bo Zhang Heng Xui Ren-Xin Xu school of physics and Space Science China West Normal UniversityNanchong 637002China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesUrumqi 830011China CSIRO Astronomy and Space Science PO Box 76EppingNSW 1710Australia CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China College of physics and electronic engineering Qilu Normal UniversityJinan 250014China Astronomy Department Cornell UniversityIthacaNY 14853USA Purple Mountain Observatory Chinese Academy of SciencesNanjing 21000& China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China

Flux densities are fundamental observational parameters that describe a *** the current pulsar catalogue,27% of the listed radio pulsars have no flux density measurement in the 20 cm observing ***,we present the first such measurements for 32 pulsars observed employing the Parkes radio *** have used both archival and new observations to make these *** schemes exist for measuring flux densities and we show how the measured flux densities vary between these methods and how the presence of radio-frequency interference will bias the flux density measurements.

关键词： methods data analysis-pulsars general

Statistical properties of fast radio bursts elucidate their origins:magnetars are favored over gamma-ray bursts

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2021年第8期21卷 285-292页

作者： Xiang-Han Cui Cheng-Min Zhang Shuang-Qiang wang Jian-wei Zhang di Li Bo Peng wei-wei Zhu Richard Strom Na wang Qingdong Wu Chang-Qing Ye De-Hua wang Yi-yan yang Zhen-Qi diao CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China school of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China school of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Department of Astronomy Beijing Normal UniversityBeijing 100875China NAOC-UKZN Computational Astrophysics Centre University of KwaZulu-NatalDurban 4000South Africa Key Laboratory of Radio Astronomy Chinese Academy of SciencesBeijing 100101China Netherlands Institute for Radio Astronomy(ASTRON) Postbus 27990 AA Dwingeloothe Netherlands Astronomical Institute ‘Anton Pannekoek’ Faculty of Science University of Amsterdam1090 GE Amsterdamthe Netherlands TianQin Research Center for Gravitational physics Sun Yat-sen UniversityZhuhai 519082China school of physics and electronic Sciences Guizhou Education UniversityGuiyang 550018China

Fast radio bursts(FRBs) are extremely strong radio flares lasting several milliseconds,most of which come from unidentified objects at a cosmological *** can be apparently repeating or *** this paper,we analyzed 18 repeaters and 12 non-repeating FRBs observed in the frequency bands of 400–800 MHz from Canadian Hydrogen Intensity Mapping Experiment(CHIME).We investigated the distributions of FRB isotropic-equivalent radio luminosity,considering the K ***,the luminosity distribution can be better fitted by Gaussian form than by *** on the above results,together with the observed FRB event rate,pulse duration,and radio luminosity,FRB origin models are evaluated and constrained such that the gamma-ray bursts(GRBs) may be excluded for the non-repeaters while magnetars or neutron stars(NSs) emitting the supergiant pulses are preferred for the *** also found the necessity of a small FRB emission beaming solid angle(about 0.1 sr) from magnetars that should be considered,and/or the FRB association with soft gamma-ray repeaters(SGRs) may lie at a low probability of about 10%.Finally,we discussed the uncertainty of FRB luminosity caused by the estimation of the distance that is inferred by the simple relation between the redshift and dispersion measure(DM).

关键词： transients:fast radio bursts methods:statistical stars:magnetars