检索结果-南通市图书馆

Five-view three-dimensional reconstructionfor ultrafast dynamic imaging of pulsedradiation sources

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第2期9卷 63-73页

作者： Jianpeng Gao liang sheng Xinyi Wang Yanhong Zhang liang Li Baojun Duan Mei Zhang Yang Li Dongwei Hei Department of Engineering Physics Tsinghua UniversityBeijing 100084China National Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi’an 710024China

Multiaxial neutron/x-ray imaging and three-dimensional (3D) reconstruction techniques play a crucial role in gaining valuable insights intothe generation and evolution mechanisms of pulsed radiation sources. Owing to the short emission time (∼200 ns) and drastic changes of thepulsed radiation source, it is necessary to acquire projection data within a few nanoseconds in order to achieve clear computed tomography3D imaging. As a consequence, projection data that can be used for computed tomography image reconstruction at a certain moment are oftenavailable for only a few angles. Traditional algorithms employed in the process of reconstructing 3D images with extremely incomplete datamay introduce significant distortions and artifacts into the final image. In this paper, we propose an iterative image reconstruction methodusing cylindrical harmonic decomposition and a self-supervised denoising network algorithm based on the deep image prior method. Weaugment the prior information with a 2D total variation prior and a 3D deep image prior. Single-wire Z-pinch imaging experiments have beencarried out at Qin-1 facility in five views and four frames, with a time resolution of 3 ns for each frame and a time interval of 40 ns betweenadjacent frames. Both numerical simulations and experiments verify that our proposed algorithm can achieve high-quality reconstructionresults and obtain the 3D intensity distribution and evolution of extreme ultraviolet and soft x-ray emission from plasma.

关键词： frames image sources

A novel method for multichannel discharge image diagnosis in gas switches based on multi-axis tomography techniques

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2023年第6期25卷 65-71页

作者：张艳红盛亮李阳张美黑东炜 State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi'an 710024People's Republic of China

The discharge channel is a crucial diagnostic tool for identifying the properties of gas ***,single-view images cannot easily be used to inherently understand the discharge channel characteristics of trigger electrodes.A reconstruction method of the discharge channel in gas switches is proposed based on a multi-axis tomography technique,which uses very few projections of optical images to reconstruct the location of a multichannel discharge in annular *** this paper,an algorithm named TVM-OSEM(total variation minimization ordered subsets expectation maximization)is proposed,which can effectively remove artifact noise to improve the reconstruction accuracy of discharge *** method is validated against simulations of a radiator with high-density-difference *** calculated discharge channel distribution from one experiment is presented.

关键词： discharge channel TVM-OSEM gas switch location

A General Synthetic Approach of Organic Lateral Heterostructures for Optical Signal Converters in All-Color Wavelength

在线全文

学校读者我要写书评

暂无评论

CCS Chemistry 2023年第2期5卷 423-433页

作者： Qiang Lv Xue-Dong Wang Wan-Ying Yang Kai-Li Wang Chao-Fei Xu Min Zheng liang-sheng Liao National Engineering Laboratory for Modern Silk College of Textile and Clothing EngineeringResearch Center of Cooperative Innovation for Functional Organic/Polymer Material Micro/NanofabricationSoochow UniversitySuzhouJiangsu 215123 Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhouJiangsu 215123 Jiangsu General Science&Technology Co. Ltd.Suzhou Industrial ParkSuzhouJiangsu 215123 Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipa 999078Macao SAR

Organic heterostructures with precisely defined compositions,architectures,and interfaces are considered promising building blocks for integrated optoelectronic ***,it remains a great challenge to rationally design and synthesize a heterostructure with tunable performance for promising applications such as optoelectronic ***,we report a universal strategy for the synthesis of organic lateral heterostructures(OLHs)with tunable function and optical *** fabricated cocrystals based on the tunable intermolecular distance(dπ–πfrom 3.33 to 3.48Å)ofBenzo[ghi]perylene(BGP)-based driven by arene-perfluoroarene interaction or charge transfer interaction;these different components were selectively constructed into organic solid solution microwires or ***,the solid solution microwires obtained could be epitaxially grown on the BGP-tetrabromophthalicanhydride trunk microwire to construct a series of OLHs microwires,which led to the successful demonstration of both photonic signal conversion and optical logic gate in all-color *** work gives a new insight into the fine synthesis of heterostructures with tunable structures/performances,providing predictable synthetic pathways to multifunctional organic heterostructures for the future realization of integrated optoelectronics.

关键词： organic heterostructure low-dimensional structure crystal epitaxial growth integrated photonics

A New Indicator Reaction and Its Application-Catalytic Determination of Ultratrace Amounts of Rhodium with Linear Sweep Voltammetry

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

Chemical Research in Chinese Universities 1993年第1期9卷 85-90页

作者： WANG Li-sheng and JIANG Zhi-liang (Department of Chemistry, Guangxi Normal University, Guilin, 541004)

Introduction Sensitive linear sweep voltammetry to have been applied to the catalytic kinetic analysis may be helpful for the application of some organic reagents to the analysis of inorganic ones by voltammetry, The catalytic reaction-linear sweep voltammetric method for the determination of noble metals, such as Ag, Os, Ru and Ir has been developed, but no report about the method for the determination of rhodium has been published so far.

关键词： Linear sweep voltammetry Catalyti method Rhodium Fast green

Psychological trauma,posttraumatic stress disorder and traumarelated depression:A mini-review

在线全文

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2023年第6期13卷 331-339页

作者： Shi-Kai Wang Min Feng Yu Fang liang Lv Gui-Lan Sun sheng-liang Yang Ping Guo Shan-Fei Cheng Min-Cai Qian Huan-Xin Chen Department of Psychiatry The Third People’s Hospital Affiliated to Huzhou UniversityHuzhou 313000Zhejiang ProvinceChina Department of Neurosis and Psychosomatic Diseases The Third People’s Hospital Affiliated to Huzhou UniversityHuzhou 313000Zhejiang ProvinceChina Department of Key Laboratory The Third People’s Hospital Affiliated to Huzhou UniversityHuzhou 313000Zhejiang ProvinceChina

There are various types of traumatic stimuli,such as catastrophic events like wars,natural calamities like earthquakes,and personal trauma from physical and psychological neglect or abuse and sexual *** events can be divided into type I and type II trauma,and their impacts on individuals depend not only on the severity and duration of the traumas but also on individuals’self-evaluation of the traumatic *** stress reactions to trauma include posttraumatic stress disorder(PTSD),complex PTSD and trauma-related ***-related depression is a reactive depression with unclear pathology,and depression occurring due to trauma in the childhood has gained increasing attention,because it has persisted for a long time and does not respond to conventional antidepressants but shows good or partial response to psychotherapy,which is similar to the pattern observed for *** trauma-related depression is associated with high risk of suicide and is chronic with a propensity to relapse,it is necessary to explore its pathogenesis and therapeutic strategy.

关键词： Psychological trauma Trauma-related depression Reactive depression Posttraumatic stress disorder Antidepressant Psychotherapy

Evolution of Geological Environment and Its Mineralization-Controlling on Gandise Massif, Tibet, China

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

矿物学报 2007年第Z1期27卷 139-144页

作者： GE liang-sheng DENG Jun ZHANG Wen-zhao XING Jun-bin YUAN Shi-song YANG Li-qiang Gold Institute of Geology Lang fangHeibei065000China State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing100083China Ministry of Education Key Laboratory of Lithosphere Structure Deep Processes and Exploration TechniquesChina University of Geosciences Beijing 100083 China State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing100083China Ministry of Education Key Laboratory of Lithosphere Structure Deep Processes and Exploration TechniquesChina University of Geosciences Beijing 100083 China Gold Institute of Geology Lang fangHeibei065000China State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing100083China Gold Institute of Geology Lang fangHeibei065000China

　　The Gandise massif in Tibet, China, is one of the most important copper-multimetal metallogenic belt of Tibet region( Hou, et al,2001 ; Qu, et al, 2001 ;……

关键词： metallogenic belt

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

一类具有最高代数免疫阶的布尔函数

计算机学报 2006年第9期29卷 1579-1583页

作者：何良生解放军信息工程大学电子技术学院郑州450004

研究了布尔函数的线性结构点个数与其代数免疫阶之间的关系,得到了具有1型线性结构布尔函数的代数免疫阶完全取决于函数零化子代数次数的结论.从线性结构点的角度构造了一类具有最高代数免疫阶的布尔函数,并给出了n为偶数时,函数的Wals... 详细信息

研究了布尔函数的线性结构点个数与其代数免疫阶之间的关系,得到了具有1型线性结构布尔函数的代数免疫阶完全取决于函数零化子代数次数的结论.从线性结构点的角度构造了一类具有最高代数免疫阶的布尔函数,并给出了n为偶数时,函数的Walsh循环谱和自相关函数的取值特点.

关键词：密码学代数攻击布尔函数代数免疫阶

A deep-learning method for evaluating shaft resistance of the cast-in-site pile on reclaimed ground using field data

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2020年第6期21卷 496-508页

作者： sheng-liang LU Ning ZHANG Shui-long SHEN Annan ZHOU Hu-zhong LI Department of Civil and Environmental Engineering College of EngineeringShantou UniversityShantou 515063China Key Laboratory of Intelligence Manufacturing Technology of Ministry of Education Shantou UniversityShantou 515063China Department of Architecture and Civil Engineering Wenzhou Vocational and Technical CollegeWenzhou 325000China Discipline of Civil and Infrastructure School of EngineeringRoyal Melbourne Institute of Technology(RMIT)Victoria 3001Australia Wenzhou Huabang Engineering Project Management Co. Ltd.Wenzhou 325207China

This study proposes a deep learning-based approach for shaft resistance evaluation of cast-in-site piles on reclaimed ground,independent of theoretical hypotheses and engineering experience.A series of field tests was first performed to investigate the characteristics of the shaft resistance of cast-in-site piles on reclaimed ***,an intelligent approach based on the long short term memory deep-learning technique was proposed to calculate the shaft resistance of the cast-in-site *** proposed method allows accurate estimation of the shaft resistance of cast-in-site piles,not only under the ultimate load but also under the working *** with empirical methods confirmed the effectiveness of the proposed method for the shaft resistance estimation of cast-in-site piles on reclaimed ground in offshore areas.

关键词： Deep-learning method Cast-in-site pile Shaft resistance Field test Reclaimed ground

Disclosing the active integration structure and robustness of a pseudo-tri-component electrocatalyst toward alkaline hydrogen evolution

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第9期31卷 210-216,I0007页

作者： Hong-Hong Zou Wan-Qing Li Cong-Hu Song Li-Ming Cao Xue-Feng Zhang Xuan-Yi Zhu Zi-Yi Du Jia Zhang sheng-liang Zhong Chun-Ting He Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education and College of Life ScienceJiangxi Normal UniversityNanchang 330022JiangxiChina Research Center for Ultrafine Powder Materials College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022JiangxiChina

Designing multicomponent integration catalysts(MICs)has been a promising strategy for improving electrocatalytic hydrogen evolution reaction(HER)due to the highly active interfaces as well as electronic ***,many fundamental questions such as their actual active species and the influence on long-term stability remain to be ***,we present the structural evolution from a pseudotri-component electrocatalyst of nitrogen-doped carbon supported nickel/vanadium nitride/vanadium oxide(Ni-VN-V_(2)O_(3)/NC)nanorods to the heterostructural nickel/vanadium nitride(Ni-VN/NC)nanosheets during chemical or electrochemical *** self-reconstructed Ni-VN/NC exhibits a robust stability under alkaline conditions,while maintaining initial efficient HER activity with a low overpotential of 76 mV at the current density of 10 mA cm^(-2).Theoretical calculations and quasi-in-situ spectroscopic technology unveil the redistribution of electrons on the synergistic active interface,which synchronously optimizes the affinities for hydrogen,hydroxide,and water molecules,thereby remarkably accelerating the HER kinetics by reducing the barrier of Volmer step.

关键词： Hydrogen evolution reaction Multicomponent integration catalysts Structural transformation Electrocatalysis Density functional theory