检索结果-南通市图书馆

A Localization Method of High Energy Transients for All-sky Gamma-ray Monitor

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第10期24卷 25-35页

作者： Yi Zhao wangchen Xue Shaolin Xiong Qi Luo Yuanhao wang Jiacong liu Heng Yu xiaoyun Zhao Yue Huang Jinyuan liao Jianchao Sun xiaobo li Qibin Yi Ce Cai Shuo xiao shenglun Xie Chao zheng Yanqiu Zhang Chenwei wang Wenjun Tan Zhiwei Guo Chaoyang li zhenghua An Gang Chen Yanqi Du Min Gao Ke Gong Dongya Guo Jiang He Jianjian He Bing li Gang li Xinqiao li Jing liang xiaohua liang Yaqing liu Xiang Ma Rui Qiao liming Song Xinying Song Xilei Sun Jin wang Ping wang Xiangyang Wen Hong Wu Yanbing Xu sheng Yang Dali Zhang Fan Zhang Hongmei Zhang Peng Zhang Shu Zhang zhen Zhang Shijie zheng Keke Zhang Xingbo Han Haiyan Wu Hu Tai Hao Geng Gaopeng Lu Wei Xu Fanchao Lyu Hongbo Zhang Fangjun Lu Shuangnan Zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of sciences Beijing 100049China school of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China College of Physics Hebei Normal UniversityShijiazhuang 050024China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China school of Physics and Electronic science Guizhou Normal UniversityGuiyang 550001China Institute of Astrophysics Central China Normal UniversityWuhan 430079China College of physics sciences technology Hebei UniversityBaoding 071002China Physics and Space science College China West Normal UniversityNanchong 637002China school of Computing and Artificial Intel{2.gence Southwest Jiaotong UniversityChengdu 611756China College of Electronic and information engineering Tongji UniversityShanghai 201804China Innovation Academy for Microsatellites of Chinese Academy of sciences Shanghai 201304China National Space science Center Chinese Academy of SciencesBeijing 100190China school of Earth and Space sciences University of Science and Technology of ChinaHefei 230026China Electronic Information school Wuhan UniversityWuhan 430072China Key Laboratory of Transportation Meteorology of china Meteorological Administration Nanjing Joint Institute for Atmospheric SciencesNanjing 210000China Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Fast and reliable localization of high-energy transients is crucial for characterizing the burst properties and guiding the follow-up *** based on the relative counts of different detectors has been widely used for all-sky gamma-ray *** are two major methods for this count distribution localization:χ^(2.minimization method and the Bayesian *** we propose a modified Bayesian method that could take advantage of both the accuracy of the Bayesian method and the simplicity of the χ^(2.*** comprehensive simulations,we find that our Bayesian method with Poisson likelihood is generally more applicable for various bursts than the χ^(2.method,especially for weak *** further proposed a location-spectrum iteration approach based on the Bayesian inference,which could alleviate the problems caused by the spectral difference between the burst and location *** method is very suitable for scenarios with limited computation resources or timesensitive applications,such as in-flight localization software,and low-latency localization for rapidly follow-up observations.

关键词： methods:data analysis methods:analytical (stars:)gamma-ray burst:general

Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

在线全文

学校读者我要写书评

暂无评论

Nuclear science and Techniques 2024年第1期35卷 178-187页

作者： sheng-Da Tang Yong-Hao Chen Jing-Yu Tang Rui-Rui Fan Qiang li Gong li Dong liu zheng-Yao Jin Xing-Zhu Cui Tian-Xiang Chen Yi-Wei Yang Rong liu Han Yi Yang li zhen Yang Qi An Hao-Fan Bai Jiang-Bo Bai Jie Bao Ping Cao Qi-Ping Chen zhen Chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-zhen Feng Ke-Qing Gao Min-Hao Gu Chang-Cai Han Zi-Jie Han Guo-Zhu He Yong-Cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Wei-Hua Jia Hao-yu Jiang Wei Jiang Zhi-jie Jiang ling Kang Bo li Chao li Jia-Wen li xiao li Jie liu Shu-Bin liu Guang-Yuan Luan Chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-Hui Song Kang Sun Zhi-Xin Tan li-Jiao wang Peng-Cheng wang Zhao-Hui wang Zhong-Wei Wen xiao-Guang Wu Xuan Wu li-Kun Xie Yong-Ji Yu Guo-Hui Zhang lin-Hao Zhang Mo-Han Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-liang Zhang Yue Zhang Zhi-Yong Zhang Mao-Yuan Zhao Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Sino-French Institute of Nuclear engineering and technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source science Center Dongguan 523803China school of Nuclear science and {2. University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and technology School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest Institute of Nuclear technology Xi’an 710024China University of Chinese Academy of sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the china Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

在线全文

学校读者我要写书评

暂无评论

Nuclear science and Techniques 2024年第8期35卷 132-141页

作者： Qiang li li‑Jiao wang Xiang‑Biao Qiu Jing‑Wen li Wei Xu Tao li Ze‑Bin lin Chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang Sun Jing‑Yu Tang Rong Zhang Han‑Tao Jing Bo Mei Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen zhen Chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑zhen Feng Ke‑Qing Gao Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei‑Hua Jia Hao‑Yu Jiang Wei Jiang Zhi‑Jie Jiang zheng‑Yao Jin ling Kang Bo li Chao li Gong li Jia‑Wen li xiao li Yang li Jie liu Rong liu Shu‑Bin liu Guang‑Yuan Luan Bin‑Bin Qi Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑Hui Song Zhi‑Xin Tan sheng‑Da Tang Peng‑Cheng wang Zhao‑Hui wang Zhong‑Wei Wen xiao‑Guang Wu Xuan Wu li‑Kun Xie Yi‑Wei Yang Han Yi Yong‑Ji Yu Guo‑Hui Zhang lin‑Hao Zhang Mo‑Han Zhang Qi‑Wei Zhang Xian‑Peng Zhang Yu‑liang Zhang Yue Zhang Zhi‑Yong Zhang Mao‑Yuan Zhao Lu‑Ping Zhou Zhi‑Hao Zhou Ke‑Jun Zhu Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future school Dongguan 523808China North Night Vision science&technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear engineering and technology Sun Yat-sen UniversityZhuhai 519082China school of Nuclear science and {2. University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear technology Xi’an 710024China University of Chinese Academy of sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the china Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

热处理对1060/7N01/1060轧制复合板显微组织及力学性能的影响

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of china 2024年第1期34卷 94-107页

作者：李顺强孙国胜张瑞升程笑刘吉梓南京理工大学材料科学与工程学院纳米异构材料中心南京210094 南京理工大学分析测试中心南京210094

利用475℃单道次热轧的方式制备界面结合良好的1060/7N01/1060层状复合板。通过扫描电子显微镜、透射电子显微镜及电子背散射衍射结合硬度和拉伸实验研究层厚比对热轧复合板显微组织和力学性能的影响。此外,对比研究冷轧前热处理(固溶... 详细信息

利用475℃单道次热轧的方式制备界面结合良好的1060/7N01/1060层状复合板。通过扫描电子显微镜、透射电子显微镜及电子背散射衍射结合硬度和拉伸实验研究层厚比对热轧复合板显微组织和力学性能的影响。此外,对比研究冷轧前热处理(固溶处理及峰值时效)对冷轧复合板显微组织和力学性能的影响。结果表明,层厚比对热轧复合板各层显微组织特征影响不大,其力学性能与混合法则理论预测结果一致。相比而言,额外的热处理对冷轧板纯铝层的晶粒尺寸无明显影响,却有助于细化7N01层的晶粒尺寸及弥散、细小析出物的形成,使其具有更显著的细晶强化、析出强化及位错强化效应。

关键词： 7N01铝合金纯铝层状复合板结合界面时效力学性能

Phase-field simulations of the effect of temperature and interface for zirconiumδ-hydrides

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第4期33卷 701-710页

作者：陈子航盛杰刘瑜施小明黄厚兵许可王越超武帅孙博刘海风宋海峰 school of Materials science and {2. Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary science Beijing Institute of TechnologyBeijing 100081China Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijing 100088China Department of Physics University of Science and Technology BeijingBeijing 100083China

Hydride precipitation in zirconium cladding materials can damage their integrity and *** temperature and material defects have a significant effect on the dynamic growth of *** this study,we have developed a phasefield model based on the assumption of elastic behaviour within a specific temperature range(613 K-653 K).This model allows us to study the influence of temperature and interfacial effects on the morphology,stress,and average growth rate of zirconium *** results suggest that changes in temperature and interfacial energy influence the length-to-thickness ratio and average growth rate of the hydride *** ultimate determinant of hydride orientation is the loss of interfacial coherency,primarily induced by interfacial dislocation defects and quantifiable by the mismatch degree *** escalation in interfacial coherency loss leads to a transition of hydride growth from horizontal to vertical,accompanied by the onset of redirection ***,redirection occurs at a critical mismatch level,denoted as qc,and remains unaffected by variations in temperature and interfacial ***,this redirection leads to an increase in the maximum stress,which may influence the direction of hydride crack *** research highlights the importance of interfacial coherency and provides valuable insights into the morphology and growth kinetics of hydrides in zirconium alloys.

关键词： zirconium hydride phase-field method temperature effect mismatch degree

Overcoming Spatial Constraints in VR:A survey of Redirected Walking Techniques

在线全文

学校读者我要写书评

暂无评论

Journal of Computer science & technology 2024年第4期39卷 841-870页

作者： Jia-Hong liu Yang-Fu Ren Qi Wen Gan Kui Huang Fiona xiao Yu Chen Er-Xia Luo Khang Yeu Tang Yue-Yao Fu Cheng-Wei Fan Sen-{2. Xu Song-Hai Zhang Academy of Arts and Design Tsinghua UniversityBeijing 100084China Department of Computer science and technology Tsinghua UniversityBeijing 100084China College of Computer technology and Application Qinghai UniversityXining 810016China Zhili College Tsinghua UniversityBeijing 100084China school of Computer Beijing Information Science and Technology UniversityBeijing 100192China Department of Physics Tsinghua UniversityBeijing 100084China school of Computer and Communication engineering University of Science and Technology BeijingBeijing 100083China

As the virtual reality(VR)technology strives to provide immersive and natural user experiences,the challenge of aligning vast virtual environments with limited physical spaces remains *** survey comprehensively explores the advancements in redirected walking(RDW)techniques aimed at overcoming spatial constraints in *** addresses this by subtly manipulating users’physical movements to allow for seamless navigation within constrained *** survey delves into gain perception mechanisms,detailing how slight discrepancies between virtual and real-world movements can be utilized without user awareness,thus extending the effective navigable *** RDW control algorithms for gain-based RDW are analyzed,highlighting their implementation and effectiveness in maintaining immersion and minimizing perceptual ***,novel methods extending beyond traditional gain-based techniques are discussed,showcasing innovative approaches that further refine VR *** practical implications of RDW in enhancing safety and reducing physical collisions in VR environments are underscored,alongside its potential to improve user experience by aligning virtual exploration more closely with natural human behavior *** a thorough review of existing literature and recent advancements,this survey provides a systematic understanding for researchers,developers,and industry *** underscores the importance of RDW in the future of VR,emphasizing RDW's role in making VR more accessible and practical across various applications,from education and training to therapy and *** paper concludes with a forward-looking perspective on the continued evolution and potential of RDW in revolutionizing virtual reality experiences.

关键词： virtual reality(VR) redirected walking(RDW) redirection gain perception

Highly Efficient and Economical Baculovirus Expression System for Preparing Human Papillomavirus Type16 Virus-like Particle

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

Acta Biochimica et Biophysica Sinica 2004年第8期36卷 548-552页

作者： Jin zheNG, Jun MA, xiao-Feng YANG, Hong-{2. liu, Hong-Wei CHENG, Lu-sheng SI, and Yi-{2. wangThe Key Laboratory of Biomedical Information engineering of Ministry of Education, Institute of Cancer Research,school of {2.fe science and technology, Xi’an Jiaotong University, Xi’an 710061,{12. The Key Laboratory of Biomedical Information engineering of Ministry of Education Institute of Cancer Research School of Life Science and TechnologyXi'an Jiaotong University Xi'an 710061 China

To improve the existing human papillomavirus type16 (HPV16) virus-like particle (VLP) preparation, a highly efficient, economical and timesaving system was established. Sf-9 cells were infected with recombinant baculovirus containing the target gene encoding HPV16L1 protein with 6×His tag, and harvested 72.h postinfection (p.i.) at 2. °C. The ProBondTM purification system was used for protein purification. The molecular weight of expressed HPV16L1 protein was 58 kD as revealed by SDS-PAGE, and confirmed by Western blot. The purity of denatured and native HPVL1 proteins that were prepared were 91.9% and 71.5%, respectively, which corresponded to a yield of 2.2. mg denatured protein and 1.84 mg native protein per 2.107 cells. The proteins were further analyzed by mouse erythrocyte hemagglutination assay and hemagglutination inhibition assay, and there effects on VLP formation were also visualized by transmission electron microscopy. Results showed that the native protein purified was biologically active as natural HPVL1 protein, inducing the murine erythrocyte agglutination and VLP formation. In addition, the purified recombinant HPV16L1 native protein with 6×His tag could self-assemble into virions in vitro. Hopefully, the present expression and purification system is promising to be convenient, timesaving and economical for preparation of HPV16 VLP vaccine.

关键词： human papillomavirus HPV16L1 protein purification virus-like particle (VLP)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于CNN-LSTM-AM的大坝变形预测

水电能源科学 2024年第10期42卷 158-161,157页

作者：赖国梁刘小生江西理工大学土木与测绘工程学院江西赣州341000

为提高大坝变形预测模型的预测精度,以长短期记忆(LSTM)作为基础模型预测大坝变形,在LSTM网络层前加入卷积神经网络(CNN)卷积层,以卷积层中卷积核刻画数据的局部模式实现数据特征的深度挖掘,提取大坝变形多因素序列时空特征;LSTM网络层... 详细信息

为提高大坝变形预测模型的预测精度,以长短期记忆(LSTM)作为基础模型预测大坝变形,在LSTM网络层前加入卷积神经网络(CNN)卷积层,以卷积层中卷积核刻画数据的局部模式实现数据特征的深度挖掘,提取大坝变形多因素序列时空特征;LSTM网络层后加入注意力机制层用于区分特征信息的重要程度并给予不同的关注度,进一步优化网络模型,构建了基于CNN-LSTM-AM的大坝预测模型。应用该大坝预测模型在工程实例中与LSTM、CNN-LSTM、LSTM-AM模型的预测结果和残差进行对比分析,CNN-LSTM-AM模型的预测结果和拟合度均更优;并以均方误差、均方根误差、平均绝对误差及决定系数R2.为精度评定指标对比各模型间预测性能,结果表明引入注意力机制能够提升模型预测性能,证实了基于CNN-LSTM-AM构建的大坝预测模型具有工程应用价值。

关键词：卷积神经网络长短期记忆网络注意力机制大坝变形预测预测精度

A Novel Conceptual Telescopic Positioning Pile for VLFS Deployed in Shallow Water:Structure Design

在线全文

学校读者我要写书评

暂无评论

china Ocean engineering 2020年第4期34卷 526-536页

作者： XU sheng-wen liu {2.-lei wang Xue-feng deng Yan-fei State Key Laboratory of Ocean engineering Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai 200240China school of Naval architecture Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China CIMC Offshore Co.Ltd Shenzhen 518000China

A conceptual design of using novel telescopic piles to position a multi-modular very large floating structure(VLFS),which is supposed to be severed as a movable floating airport,is *** telescopic piles can automatically plug in the soil to resist the environmental loads and pull out from the soil to evacuate or move on to the next operational *** feasibi{2.ty demonstration of the conceptual design includes two parts:function verification and structure *** the latter part of the conceptual design,a time-domain structural analysis is firstly conducted by using Abaqus *** simulation results suggest that the pre{2.minary structure scheme is not optimum due to the insufficient structure uti{2.zation,although both structure safety of the piles and positioning accuracy are *** rea{2.ze a cost reduction of construction and installation,a Genetic Algorithm-Finite Element Analysis(GA-FEA)method is employed to perform structural *** optimization,31 percent of the weight of each pile is reduced and higher structure uti{2.zation is *** difference of the self-weight and allowable buoyancy of a single module(SMOD)of a semisubmersible-type VLFS is much larger than the weight of the *** with the function verification in our previous work,the conceptual design of using the novel telescopic pile to position VLFS is demonstrated to be feasible.

关键词： novel telescopic positioning pile feasibility demonstration structural optimization very large floating structure(VLFS)