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The large-scale modular BGO detection array(LAMBDA)design and test

Nuclear Science and Techniques 2024年第11期35卷 228-236页

作者： Yao-De Sheng Lu-Yang Song Jun Su Shi-Lun Jin Fei Lu Yang-Ping Shen Jun-Feng Chen Li-Yong Zhang Jian-Jun He xin-Yue Li Hong-Na Liu Feng-Shou Zhang Meng-Lin Qiu Shen Lin Hao Zhang Luo-Huan Wang Zi-Ming Li Yin-Ji Chen xin-zhi jiang xin Chen zhi-Lin Shen Feng-Cheng Liu zhi-Wei Qin Lin Wang Yi-Tong Huang Xiang Li Si-Ze Chen You-Bao Wang zhi-Hong Li Bing Guo Wei-Ping Liu Key Laboratory of Beam Technology of Ministry of Education School of Physics and AstronomyBeijing Normal UniversityBeijing 100875China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 201800China Key Laboratory of Nuclear Physics and Ion‑Beam Application(MoE) Institute of Modern PhysicsFudan University200433 ShanghaiChina School of Mathematics and Physics Handan UniversityHandan 056005China Institute of Nuclear Energy Safety Technology Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Department of Physics Southern University of Science and TechnologyShenzhen 518055China

Total absorption gamma-ray spectroscopy(TAGS)is a powerful tool for measuring complexγ transitions,which has been effectively applied to the study of reactor decay *** paper presents the design of a new TAGS detector,the large-scale modular BGO detection array(LAMBDA),tailored for measuringβ-decay intensity distributions of fission *** modular design allows the LAMBDA detectors to be assembled in various *** final version of LAMBDA consists of 102 identical 60 mm×60 mm×120 mm BGO crystals and exhibits a high full-energy peak efficiency exceeding 80%at 0.5∼8 MeV based on a Monte Carlo ***,approximately half of the LAMBDA modules have been *** usingγ-ray sources and nuclear reactions demonstrated favorable energy resolution,energy linearity,and efficiency uniformity across the ***-eight modules have been integrated into the prototype *** capability of LAMBDA-I inβ-delayedγ-decay experiments was evaluated by commissioning measurements using the ^(152)Eu source.

关键词： Total absorption gamma-ray spectroscopy Reactor decay heat Beta-decay BGO detector array LAMBDA

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Effects of permanent left bundle branch area pacing on QRS duration and short-term cardiac function in pacing-indicated patients with left bundle branch block

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Chinese Medical Journal 2021年第9期134卷 1101-1103页

作者： Qi-Jun Shan Hai Xu Xiu-Juan Zhou Qing Chang Ling Ji Chun Chen zhi-xin jiang Decarnment of caroiology.The First Aifiated Hosptal of Nanjing Medcal University(jiangsu Province Hospital) NanjingJiangsu 210029China

In 1986,Burkhoff and Sagawa[1]observed that left ventricular pressure decreased linearly as the QRS duration(QRSd)increased in a pacing ***,it became recognized that either left bundle branch block(LBBB)or right ventricular pacing could result in prolonged QRSd,with potential deleterious effects on cardiac function and increased risk of atrial fibrillation(AF),heart failure,and mortality.[2]Although previous clinical trials have demonstrated that patients with LBBB and heart failure could benefit from biventricular pacing(ie,biventricular cardiac resynchronization therapy[BiV-CRT]),30%to 40%of such patients do not respond to BiV-CRT and approximately an additional 10%of patients remain untreated owing to an unsuitable coronary sinus *** the development of appropriate implant tools,His bundle pacing(HBP)has become increasingly important to enhance pacing as an adjunctive therapy in heart failure *** studies have demonstrated that CRT utilizing HBP(His-CRT)may be valuable in patients with no response or failure to place a ***,HBP has higher pacing threshold and lower R-wave amplitude shortcomings and cannot correct LBBB in patients with distal conduction system disease.

关键词： patients cardiac bundle

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Direct measurement of the break-out ^(19)F(p,γ)^(20)Ne reaction in the China Jinping underground laboratory(CJPL)

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Nuclear Science and Techniques 2024年第8期35卷 142-152页

作者： Yin‑Ji Chen Hao Zhang Li‑Yong Zhang Jian‑Jun He Richard James deBoer Michael Wiescher Alexander Heger David Kahl Jun Su Daniel Odell xin‑Yue Li Jian‑Guo Wang Long Zhang Fu‑Qiang Cao zhi‑Cheng Zhang xin‑zhi jiang Luo‑Huan Wang Zi‑Ming Li Lu‑Yang Song Liang‑Ting Sun Qi Wu Jia‑Qing Li Bao‑Qun Cui Li‑Hua Chen Rui‑Gang Ma Er‑Tao Li Gang Lian Yao‑De Sheng zhi‑Hong Li Bing Guo Wei‑Ping Liu Key Laboratory of Beam Technology of the Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Department of Physics and Astronomy The Joint Institute for Nuclear AstrophysicsUniversity of Notre DameNotre DameIN 46556USA School of Physics and Astronomy Monash UniversityClaytonVIC 3800Australia Facility for Rare Isotope Beams Michigan State UniversityEast LansingMI 48824USA Institute of Nuclear and Particle Physics and Department of Physics and Astronomy Ohio UniversityAthensOH 45701USA Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China China Institute of Atomic Energy Beijing 102413China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China College of Science Southern University of Science and TechnologyShenzhen 518055China Institute of Radiation Technology Beijing Academy of Science and TechnologyBeijing 100875China Key Laboratory of Nuclear Physics and Ion‑Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Mathematics and Physics Handan UniversityHandan 056005China

Calcium production and the stellar evolution of first-generation stars remain fascinating mysteries in *** one possible nucleosynthesis scenario,break-out from the hot carbon–nitrogen–oxygen(HCNO)cycle was thought to be the source of the calcium observed in these oldest ***,according to the stellar modeling,a nearly tenfold increase in the thermonuclear rate ratio of the break-out ^(19)F(p,γ)^(20) Ne reaction with respect to the competing ^(19)F(p,α)^(16) O back-processing reaction is required to reproduce the observed calcium *** performed a direct measurement of this break-out reaction at the China Jinping underground *** measurement was performed down to the low-energy limit of E_(c.m.)=186 keV in the center-of-mass *** key resonance was observed at 225.2 keV for the first *** a temperature of approximately 0.1 GK,this new resonance enhanced the thermonuclear ^(19)F(p,γ)^(20) Ne rate by up to a factor of≈7.4,compared with the previously recommended NACRE *** is of particular interest to the study of the evolution of the first stars and implies a stronger breakdown in their“warm”CNO cycle through the ^(19)F(p,γ)^(20) Ne reaction than previously *** break-out resulted in the production of the calcium observed in the oldest stars,enhancing our understanding of the evolution of the first stars.

关键词： Nuclear astrophysics First stars Abundance of calcium Reaction cross section Reaction rate China Jinping underground laboratory(CJPL) JUNA

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Positive effect of Mo on mechanical properties of a Ni-42W-10Co-x Mo medium heavy alloy

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China Foundry 2025年

作者： Guo-xin Cao Jian-xin Dong Yong-sheng He He jiang Fang Hao zhi-hua Nie Teng-fei Ma Bao-quan Fu School of Materials Science and Engineering University of Science and Technology Beijing Xi'an Superalloy Technology Co. Ltd. School of Materials Science and Engineering Beijing Institute of Technology Key Laboratory of Air-driven Equipment Technology of Zhejiang Province Quzhou University

In this study,a novel Ni-W-Co-Mo medium heavy alloy (MHA) was designed to improve its mechanical strength via Mo *** the Ni-42W-10Co-xM o alloy series,where x represents the weight percent of Mo and varies between 0,1,2,5,and 10,the microstructure transitions from a dendritic structure to a hypoeutectic structure as the Mo content increases from 0 to 5wt.%.Moreover,as the Mo content increases from 0to 10wt.%,the distribution of theμ-phase shifts from being individually dispersed to forming aggregates,and its volume fraction rises from 0.5%to 7.9%.Notably,theμ-phase evolves into an eutectic microstructure,which helps in minimizing the segregation of *** change is accompanied by a substantial enhancement in mechanical properties;specifically,the compressive yield strength at room temperature increases from 350 MPa to 646 MPa,indicating a significant 85%***,the microhardness increases from 230 HV to 304 *** dynamics simulations further reveal that the strengthening mechanism of Ni-42W-10Co-xM o alloys is Mo-induced solid solution strengthening and precipitation strengthening.

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The Neural Network Technology Applied on Fault Detection of Locomotive Converter

The Neural Network Technology Applied on Fault Detection of ...

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2010 Chinese Control and Decision Conference

作者： Li-xin Lin,xin-hua jiang,zhi-wu Huang School of Information Science and Engineering,Central South University,Changsha 410075 China

＜正＞The paper analyzes the fault principle of the SS7E locomotive converter,and classifies the fault sorts of *** paper describes a method of adopting wavelet analysis to extract energy eigenvector from the output voltage wave of the converter,and proposes a fault diagnosis method of the converter by using energy eigenvector and neural-network *** hardware frame and software design of the fault diagnosis system are discussed and the application scheme to diagnose the specific fault position of converter online by increasing a few monitoring points is *** validity of the method is proved by computer simulation.

关键词： energy eigenvector converter wavelet neural network

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基于不同溅射方法制备铜锌锡硫薄膜及太阳电池

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硅酸盐学报 2018年第7期46卷 1011-1020页

作者：徐信蒋志李志山陆熠磊王书荣云南师范大学云南省农村能源工程重点实验室

采用共溅射及分步溅射方法在涂钼的钠钙玻璃衬底上分别形成金属预制层,先后在低温及高温下对金属预制层进行合金后硫化,制备了铜锌锡硫（Cu2Zn SnS4,CZTS）薄膜。研究了薄膜的晶体结构、表面和截面形貌、元素组分、薄膜中的相纯度及元... 详细信息

采用共溅射及分步溅射方法在涂钼的钠钙玻璃衬底上分别形成金属预制层,先后在低温及高温下对金属预制层进行合金后硫化,制备了铜锌锡硫（Cu2Zn SnS4,CZTS）薄膜。研究了薄膜的晶体结构、表面和截面形貌、元素组分、薄膜中的相纯度及元素的化学状态。结果表明：共溅射预制层得到的CZTS薄膜的表面及截面形貌优于分步溅射预制层得到的CZTS薄膜。用紫外-可见分光光度计与Hall测试系统表征了CZTS薄膜的光电特性,发现在200℃退火15 h能有效降低CZTS薄膜的缺陷态密度,增加CZTS薄膜中的载流子迁移率和扩散系数。研究结果表明,采用共溅射制备CZTS薄膜太阳电池性能优于分步溅射法,且经过退火处理的CZTS薄膜制备的电池特性均得到有效提高。基于分步溅射法制备的CZTS吸收层制备的电池开路电压为722 m V,短路电流密度为11.2 mA/cm2,最高转换效率为3.22%;基于共溅射法制备的CZTS吸收层制备的电池开路电压为637 m V,短路电流密为15.0 mA/cm2,最高转换效率为3.88%。

关键词：铜锌锡硫薄膜共溅射分步溅射太阳电池硫化

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Effects of Medium Nutrient on the Attachment Mode of Antheridia on Oogonia in Phytophthora sojae

Effects of Medium Nutrient on the Attachment Mode of Antheri...

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第三届全国生物入侵大会

作者： Yu-li Dai,Yan-can Wu,Bing-xin jiang,zhi-mou Gao College of Plant Protection,Anhui agricultural University,Hefei 230036,China

The effects of medium nutrient on the attachment mode of antheridia on oogonia in Phytophthora sojae *** Gerd were studied to provide reference evidence for the identification of the dangerous oomycete causing soybean *** results showed that the tested isolate AH6 formed predominantly paragynous antheridia(PaA) on carrot agar,lima bean agar(LBA),maize granule agar, soybean agar and tomato agar media with 85.7%,80.3%,80.0%,76.0%and 68.7%paragynous antheridia(PaA),respectively,but produced predominantly amphigynous antheridia(AmA) on oat agar (OMA) media(with 75.7%AmA).Further investigation indicated that all of the three tested isolates from different localities,AH3,AH6 and AH29,formed mostly PaA on LBA(with 80.3%to 88.3%of PaA),but produced mostly AmA on OMA(with 46.0%to 75.7%of AmA) and that the AmA percentage decreased with a decrease in OMA concentration on OMA(the AmA percentage down to 33.7%on 1/4 strength OMA) and increased with a decreased in LBA concentration on LBA(up to 53.3%on 1/4 strength LBA).The variance analyses showed that AmA percentages among different kinds and concentration of media were significantly different at the level of *** results mentioned above indicated that the medium nutrient had a significant effect on the attachment mode of antheridia on oogonia in Phytophthora sojae,which should be noticed in the identification of the pathogenic oomycete

关键词： Phytophthora sojae Medium Antheridium attachment mode Amphigynous antheridium Paragynous antheridium

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基于组合灰色神经网络模型的电力远期价格预测

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上海交通大学学报 2003年第9期37卷 1329-1332页

作者：马歆侯志俭蒋传文邰能灵上海交通大学电气工程系上海200030

针对电力远期价格受多种因素影响,变化趋势复杂,难以通过建立准确的数学模型进行预测,提出了采用灰色动态模型对电力远期价格进行预测,并在此基础上构造了组合灰色神经网络预测模型.该模型有效地将灰色理论弱化数据序列波动性的优点和... 详细信息

针对电力远期价格受多种因素影响,变化趋势复杂,难以通过建立准确的数学模型进行预测,提出了采用灰色动态模型对电力远期价格进行预测,并在此基础上构造了组合灰色神经网络预测模型.该模型有效地将灰色理论弱化数据序列波动性的优点和神经网络特有的非线性适应性信息处理能力相融合.研究结果表明,本模型能在小样本、贫信息的条件下对电力远期价格做出比较准确的预测,为电力市场的参与者能更好地利用电力远期合约进行套期保值提供了有效的工具.

关键词：电力远期合约组合灰色神经网络价格预测

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Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

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Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-Yu jiang Dan-Dan Cui Kun-Rong Du Hong-Run Zhang Sheng-Jie Xu Ya-Qi Li zhi-Zhen Ren Liang Wang Wei-Chang Hao Yi Du School of Physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts

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生物人工肝用肝细胞低温保存的现状与进展

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世界华人消化杂志 2010年第17期18卷 1792-1798页

作者：蒋知新沙杭李庆勇张清华李安全林虎高毅中国人民解放军第305医院北京市100017 南方医科大学研究生院广东省广州市510515 南方医科大学珠江医院肝胆二科广东省广州市510262

大量功能好的肝细胞是生物人工肝支持系统(bio-artificial liver support system,BLASS)的核心,是制约BLASS临床广泛应用的瓶颈.探索出一种实用的肝细胞低温保存方法,建立一个随时可用(ready to use)的肝细胞库是BALSS普遍推广的基础.... 详细信息

大量功能好的肝细胞是生物人工肝支持系统(bio-artificial liver support system,BLASS)的核心,是制约BLASS临床广泛应用的瓶颈.探索出一种实用的肝细胞低温保存方法,建立一个随时可用(ready to use)的肝细胞库是BALSS普遍推广的基础.目前肝细胞低温保存分为4℃或零下非结冰保存和-80℃或-196℃深低温冻存两大类,两大类保存方法各有优缺点.影响肝细胞低温保存的因素很多,如保存(冻存)液、(冻存)保护剂等.有关肝细胞在低温保存过程中死亡的机制尚未完全阐明,但大量研究发现细胞凋亡是除了坏死之外低温保存肝细胞死亡的另一个重要的途径.

关键词：生物人工肝低温保存细胞凋亡

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