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Nuclear Science and Techniques 2024年第4期35卷 189-199页

作者： Jie-Yu Zhu Yang-Zhou Su Hai-Bo Yang Fen-Hua Lu Yan Yang Xi-Wen Liu Ping Wei Shu-Cai Wan Hao-Qing Xie Xian-Qin Li Cong Dai Hui-Jun Hu Hong-Bang Liu Shu-Wen Tang 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 Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

The high energy cosmic-radiation detection(HERD)facility is planned to launch in 2027 and scheduled to be installed on the China Space *** serves as a dark matter particle detector,a cosmic ray instrument,and an observatory for high-energy gamma rays.A transition radiation detector placed on one of its lateral sides serves dual purpose,(ⅰ)calibrating HERD's electromagnetic calorimeter in the TeV energy range,and(ⅱ)serving as an independent detector for high-energy gamma *** this paper,the prototype readout electronics design of the transition radiation detector is demonstrated,which aims to accurately measure the charge of the anodes using the SAMPA application specific integrated circuit *** electronic performance of the prototype system is evaluated in terms of noise,linearity,and *** the presented design,each electronic channel can achieve a dynamic range of 0–100 fC,the RMS noise level not exceeding 0.15 fC,and the integral nonlinearity was<0.2%.To further verify the readout electronic performance,a joint test with the detector was carried out,and the results show that the prototype system can satisfy the requirements of the detector's scientific goals.

关键词： HERD Dark matter particle detection TRD Readout electronics SAMPA Data acquisition Performance test

NνDEx-100 conceptual design report

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Nuclear Science and Techniques 2024年第1期35卷 18-33页

作者： Xi-Guang Cao Yan-Long Chang Kai Chen Emilio Ciuffoli Li-Min Duan Dong-Liang Fang Chao-Song Gao Surja K.Ghorui Peng-Chong Hu Qiang Hu Si-Yuan Huang Ze-Yu Huang Lei Lang Yu-Lan Li Zhi-Jie Li Tian-Yu Liang Jun Liu Chen-Gui Lu Fa-Tai Mai Yuan Mei Hao Qiu Xiang-Ming Sun Xiao-xing Tang Hu-Lin Wang Qian-Ming Wang Le Xiao Mu-Yun Xiao Jian-Yu xin Nu Xu Peng Yang Yi-Chen Yang Zhen Yang Zong-Yang Yu Dong-Liang Zhang Jun-Wei Zhang cheng-xin zhao Dou Zhu NνDEx-100 collaboration Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Lanzhou University Lanzhou 730000China Central China Normal University Wuhan 430079China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Lawrence Berkeley National Laboratory BerkeleyCA 94720USA North China University of Water Resources and Electric Power Zhengzhou 450045China 不详

Observing nuclear neutrinoless double beta (0vββ) decay would be a revolutionary result in particle *** such a decay would prove that the neutrinos are their own antiparticles,help to study the absolute mass of neutrinos,explore the origin of their mass,and may explain the matter-antimatter asymmetry in our universe by lepton number *** propose developing a time projection chamber (TPC) using high-pressure ^(82)SeF_(6) gas and Topmetal silicon sensors for readout in the China Jinping Underground Laboratory (CJPL) to search for neutrinoless double beta decay of82Se,called the NvDEx *** being located at CJPL with the world’s thickest rock shielding,NvDEx combines the advantages of the high Qββ(2.996 MeV) of82Se and the TPC’s ability to distinguish signal and background events using their different topological *** makes NvDEx unique,with great potential for low-background and high-sensitivity 0 vββ***-100,a NvDEx experiment phase with 100 kg of SeF_(6)gas,is being built,with plans to complete installation at CJPL by *** report introduces 0 vββ physics,the NvDEx concept and its advantages,and the schematic design of NvDEx-100,its subsystems,and background and sensitivity estimation.

关键词： Neutrinoless double beta decay Time projection chamber ^(82)SeF_(6) China Jinping Underground Laboratory

Hi'CT:a pixel sensor-based device for ion tomography

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Nuclear Science and Techniques 2023年第7期34卷 231-241页

作者： Yi-Lun Chen Hong-Kai Wang Shi-Yu Zhang Hai-Bo Yang cheng-xin zhao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China 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 School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516003China

Carbon ions,commonly referred to as particle therapy,have become increasingly popular in the last *** predicting the range of ions in tissues is important for the precise delivery of doses in heavy-ion *** uncertainty is currently the largest contributor to dose uncertainty in normal tissues,leading to the use of safety margins in treatment *** potential method is the direct relative stopping measurement(RSP)with ***-ion CT(Hi′CT),a compact segmented full digital tomography detector using monolithic active pixel sensors,was designed and evaluated using a 430 MeV/u high-energy carbon ion pencil beam in *** precise position of the individual carbon ion track can be recorded and reconstructed using a 30μm×30μm small pixel pitch *** types of customized image reconstruction algorithms were developed,and their performances were evaluated using three different modules of CAT-PHAN 600-series *** RSP measurement accuracy of the tracking algorithm for different types of materials in the CTP404 module was less than 1%.In terms of spatial resolution,the tracking algorithm could achieve a 20%modulation transfer function normalization value of CTP528 imaging results at 5 lp/cm,which is significantly better than that of the fast imaging algorithm(3 lp/cm).The density resolution obtained using the tracking algorithm of the customized CTP515 was approximately 10.5%.In conclusion,a compact digital Hi'CT system was designed,and its nominal performance was evaluated in a *** RSP resolution and image quality provide potential feasibility for scanning most parts of an adult body or pediatric patient,particularly for head and neck tumor treatment.

关键词： Heavy-ion imaging Computed tomography Silicon pixel detectors Monte Carlo Phantoms Radiotherapy Image-guided Tracking

Hformer:highly efficient vision transformer for low-dose CT denoising

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Nuclear Science and Techniques 2023年第4期34卷 161-174页

作者： Shi-Yu Zhang zhao-Xuan Wang Hai-Bo Yang Yi-Lun Chen Yang Li Quan Pan Hong-Kai Wang cheng-xin zhao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516003China School of Cybersecurity Northwestern Polytechnical UniversityXi’an 710072China School of Automation Northwestern Polytechnical UniversityXi’an 710072China Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100021China

In this paper,we propose Hformer,a novel supervised learning model for low-dose computer tomography(LDCT)*** combines the strengths of convolutional neural networks for local feature extraction and transformer models for global feature *** performance of Hformer was verified and evaluated based on the AAPM-Mayo Clinic LDCT Grand Challenge *** with the former representative state-of-the-art(SOTA)model designs under different architectures,Hformer achieved optimal metrics without requiring a large number of learning parameters,with metrics of33.4405 PSNR,8.6956 RMSE,and 0.9163 *** experiments demonstrated designed Hformer is a SOTA model for noise suppression,structure preservation,and lesion detection.

关键词： Low-dose CT Deep learning Medical image Image denoising Convolutional neural networks Selfattention Residual network Auto-encoder

Spacelike Framed Curves with Lightlike Components and Singularities of Their Evolutes and Focal Surfaces in Minkowski 3-space

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Acta Mathematica Sinica,English Series 2024年第6期40卷 1521-1532页

作者： Peng cheng LI Dong He PEI xin zhao School of Mathematics and Statistics Northeast Normal UniversityChangchun 130024P.R.China Department of Mathematics Harbin Institute of TechnologyWeihai 264209P.R.China School of Mathematics and Statistics Qingdao UniversityQingdao 266071P.R.China

In this paper,we define the evolute and focal surface of a spacelike framed curve with lightlike components in Minkowski *** is a generalization of the previous results of regular spacelike curves,since singularities are allowed in the original spacelike curves studied by spacelike framed curves with lightlike ***,we show a new geometric invariant to characterise singularities of the focal ***,the classification theorem and recognition theorem for the singularities of the focal surface in generic are also given.

关键词： Evolutes focal surfaces spacelike framed curves singularities

An online fast multi-track locating algorithm for high-resolution single-event effect test platform

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Nuclear Science and Techniques 2023年第5期34卷 86-100页

作者： Yu-Xiao Hu Hai-Bo Yang Hong-Lin Zhang Jian-Wei Liao Fa-Tai Mai cheng-xin zhao Institute of modern physics Chinese Academy of SciencesLanzhou 730000China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516003China University of Chinese Academy of Sciences Beijing 100049China

To improve the efficiency and accuracy of single-event effect(SEE)research at the Heavy Ion Research Facility at Lanzhou,Hi’Beam-SEE must precisely localize the position at which each heavy ion hitting the integrated circuit(IC)causes *** this study,we propose a fast multi-track location(FML)method based on deep learning to locate the position of each particle track with high speed and *** can process a vast amount of data supplied by Hi’Beam-SEE online,revealing sensitive areas in real *** is a slot-based object-centric encoder-decoder structure in which each slot can learn the location information of each track in the *** make the method more accurate for real data,we designed an algorithm to generate a simulated dataset with a distribution similar to that of the real data,which was then used to train the *** comparison experiments demonstrated that the FML method,which has the best performance on simulated datasets,has high accuracy on real datasets as *** particular,FML can reach 238 fps and a standard error of 1.6237μ*** study discusses the design and performance of FML.

关键词： Beam tracks Multi-track location Rapid location High accuracy Synthetic data Deep neural network Single-event effects Silicon pixel sensors HIRFL

Influence of alloy ingredients on mechanical properties of ternary boride hard alloy clad materials

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中国有色金属学会会刊：英文版 2004年第z1期14卷 482-486页

作者： LIU Fu-tian SONG Shi-xue YANG Jun-ru HUANG Wei-ling HUANG Chuan-zhen cheng xin LI zhao-qian School of Materials Science and Engineering Ji''nan University Ji''nan 250022 China School of Mechanical Engineering Shandong University Ji''nan 250061 China Techinal Center Ji''nan Iron & Steel Group Corporation Ji''nan 250101 China School of Materials Science and Engineering Ji''nan University Ji''nan 250022 China School of Mechanical Engineering Shandong University Ji''nan 250061 China School of Mechanical Engineering Shandong University Ji''nan 250061 China School of Mechanical Engineering Shandong University Ji''nan 250061 China School of Materials Science and Engineering Ji''nan University Ji''nan 250022 China School of Mechanical Engineering Shandong University Ji''nan 250061 China

Using Mo, B-Fe alloy and Fe powders as raw materials, and adding C, Cr and Ni ingredients, respectively, or C, Cr and Ni mixed powders, ternary boride hard alloy clad materials was prepared on Q235 steel substrate by means of in-situ reaction and vacuum liquid phase sintering technology. The influence of alloy ingredients on the mechanical properties of ternary boride hard alloy clad materials was investigated. The results indicate that a mixture of 0.8% C, 5% Cr and 2% Ni ingredients gives a ternary boride hard alloy clad material with optimal mechanical properties, such as high transverse rupture strength, high hardness and good wear resistance.

关键词： hard alloy cladding liquid phase sintering alloying ingredient transverse rupture strength hardness wear resistance

Enhanced thermoelectric and mechanical properties of Bi_(0.5)Sb_(1.5)Te_(3) alloy with dispersed yttrium oxide ceramic nanoparticles

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Rare Metals 2024年第4期43卷 1758-1768页

作者： Cun-cheng Li Ming-Wei Zhang Ji-Wu xin Lei Wei Wen-Yu zhao School of Materials Science and Engineering Shandong University of TechnologyZibo255000China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore639798Singapore State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

Reducing thermal conductivity while avoiding adverse interfacial reactions during sintering is crucial for improving the thermoelectric performance of Bi_(2)Te_(3)based *** ceramic nanoparticles are good candidates for achieving this *** this study,we designed and prepared a series of p-type Bi_(0.5)Sb_(1.5)Te_(3)nanocomposites decorated with Y_(2)O_(3)ceramic nanoparticles via ball-milling dispersion and spark-plasma *** to the chemical stability of the ceramics,no traces of atomic doping or interfacial reactions were *** measurements revealed that the Y_(2)O_(3)nanoparticles distributed along the grain boundaries acted as energy-dependent carrier-filtering centers to improve the scattering parameter and Seebeck coefficient,contributing to the elevated power factor even with a decreased electrical ***,the incorporated Y_(2)O_(3)nanoparticles and various defect structures they induced effectively strengthened the phonon scattering and suppressed the lattice thermal ***,a peak figure of merit(ZT)of 1.23 at 313 K was achieved for 0.4%Y_(2)O_(3)/Bi_(0.5)Sb_(1.5)Te_(3),which is 13%higher than that of the *** addition,the Vickers hardness of the composite material was 35%higher than that of the *** study demonstrates the effectiveness of ceramic nanoparticles in synergistic ally improving the thermoelectric and mechanical properties,which may be further extended to other thermoelectric systems.

关键词： Bi_(0.5)Sb_(1.5)Te_3 alloy Y_(2)O_(3) ceramic nanoparticles Microstructures Thermoelectric performance Mechanical properties

Unique Azolyl Acylhydrazonyl Hybridization of Aloe Emodins to Access Potential Antibacterial Agents

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Chinese Journal of Chemistry 2024年第15期42卷 1741-1758页

作者： Yi-xin Wang zhao Deng Aisha Bibi Bo Fang cheng-He Zhou Institute of Bioorganic&Medicinal Chemistry Key Laboratory of Applied Chemistry of Chongqing MunicipalitySchool of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China College of Pharmacy National&Local Joint Engineering Research Center of Targeted and Innovative TherapeuticsChongqing Key Laboratory of Kinase Modulators as Innovative MedicineChongqing University of Arts and SciencesChongqing 402160China

A type of unique azole-hybridized acylhydrazonyl aloe emodins(AAEs)were developed as new antibacterial agents for combating bacterial *** target AAEs showed strong antibacterial activities,especially,tetrazolylthioether AAE 27a exhibited broad antibacterial spectrum with 16-256 folds and 8-64 folds more active antibacterial efficacy than the reference drugs aloe emodin and norfloxacin,*** AAE 27a also gave low hemolysis and cytotoxicity,as well as favorable *** mechanism explorations revealed that tetrazolylthioether AAE 27a could cause bacterial membrane depolarization and damage the cell membrane,resulting in nucleic acid ***,compound 27a could intercalate into DNA to impede its replication and form supramolecular 27a-DNA gyrase complex to disturb the function of DNA *** findings would provide valuable insights for the further exploration of azolyl acylhydrazonyl aloe emodins as new potential antibacterial candidates.

关键词： Aloe emodin Hydrazone Heterocycle Antibacterial Membrane damage

Functional map of the macroglomerular complex of male Helicoverpaarmigera

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Insect Science 2023年第1期30卷 109-124页

作者： Xiao-Lan Liu Xi Chu Long-Long Sun Ya-Nan Wang Gui-Ying Xie Wen-Bo Chen Yang Liu Bente GBerg Shi-Heng An Gui-Rong Wang xin-Ming Yin xin-cheng zhao Henan International Joint Laboratory of Green Pest Control College of Plant ProtectionHenan Agricultural UniversityZhengzhouChina State Key Laboratory for Biology of Plant Disease and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBejingChina Chemosensory Laboratory Department of PsychologyNorwegian University of Science and TechnologyTrondheimNorway

The mechanism of sex pheromone reception in the male cotton bollworm Helicoverpa armigera has been extensively studied because it has become an important model system for understanding insect ***,the pathways of pheromone processing from the antenna to the primary olfactory center in *** have not yet been ***,the physiology and morphology of male *** olfactory sensory neurons(OSNs)were studied using single sensillum recording along with anterograde filling and intracellular recording with retrograde *** localized in type A sensilla responded to the major pheromone component cis-11-hexadecenal,and the axonal terminals projected to the cumulus(Cu)of the macroglomerular complex(MGC).The OSNs in type B sensilla respondcd to the bchavioral antagonist cis-9-tetradecenal,and the axonal terminals projected to the dorsomedial anterior(DMA)unit of the *** type C sensilla,there were 2 OSNs:one that responded to cis-9-tetradecenal and cis-11-hexadecenol with the axonal terminals projecting to the DMA,and another that responded to the secondary pheromone components cis-9-hexadecenal and cis-9-tetradecenal with the axonal terminals projecting to the dorsomedial posterior(DMP)unit of the *** A and type B sensilla also housed the secondary OSNs,which were silent neurons with axonal terminals projected to the glomerulus G49 and ***,the neural pathways that carry information on attractiveness and aversiveness in response to female pheromone components in *** exhibit distinct projections to the MGC units.

关键词： intracellular recording/retrograde filling macroglomerular complex olfactory sensory neuron single sensillum recording/anterograde filling