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Searching for^(76)Ge neutrinoless double beta decay with the CDEX-1B experiment

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Chinese Physics C 2024年第10期48卷 11-22页

作者： Bing-Tao Zhang Jun-Zheng wang Li-Tao Yang Qian Yue Ke-Jun Kang Yuan-Jing Li Hai-Peng An C.Greeshma Jian-Ping Chang Yun-Huan Chen Jian-Ping Cheng Wen-Han Dai Zhi Deng Chang-Hao Fang Xin-Ping Geng Hui Gong Qiu-Ju Guo Xu-Yuan Guo Li He Sheng-Ming He Jin-wei Hu Han-Xiong Huang Tu-Chen Huang Hai-Tao Jia Xi Jiang S.Karmakar Hao-Bin Li Jian-Min Li Jin Li Qian-Yun Li ren-Ming-Jie Li Xue-Qian Li Yu-Lan Li Yi-Fan Liang Bin Liao Fong-Kay Lin Shin-Ted Lin Jia-Xuan Liu Shu-Kui Liu Yan-Dong Liu Yu Liu Yuan-Yuan Liu Zhong-Zhi Liu Hao Ma Yu-Cai Mao Qi-Yuan Nie Jin-Hua Ning Hui Pan Ning-Chun Qi Jie ren Xi-Chao Ruan Ze She Manoj Kumar Singh Tian-Xi Sun Chang-Jian Tang wei-You Tang Yang Tian Guang-Fu wang Li wang Qing wang Yu-Feng wang Yun-Xiang wang Henry-Tsz-King Wong Shi-Yong Wu Yu-Cheng Wu Hao-Yang Xing Rui Xu Yin Xu Tao Xue Yu-Lu Yan Nan Yi Chun-Xu Yu Hai-Jun Yu Jian-Feng Yue Ming Zeng Zhi Zeng Feng-Shou Zhang Lei Zhang Zhen-Hua Zhang Zhen-Yu Zhang Kang-Kang Zhao Ming-gang Zhao Ji-Fang Zhou Zu-Ying Zhou Jing-Jun Zhou Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and Department of Engineering Physics Tsinghua UniversityBeijing 100084 Department of Physics Tsinghua UniversityBeijing 100084 Institute of Physics Academia SinicaTaipei 11529 NUCTECH Company Beijing 100084 YaLong River Hydropower Development Company Chengdu 610051 College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875 College of Physics Sichuan UniversityChengdu 610065 school of Physics Peking UniversityBeijing 100871 Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413 Sino-French Institute of Nuclear and Technology Sun Yat-sen UniversityZhuhai 519082 school of Physics Nankai UniversityTianjin 300071 Department of Physics Banaras Hindu UniversityVaranasi 221005 Department of Physics Beijing Normal UniversityBeijing 100875

We operated a p-type point contact high purity germanium(PPCGe)detector(CDEX-1B,1.008 kg)in the China Jinping Underground Laboratory(CJPL)for 500.3 days to search for neutrinoless double beta(0νββ)decay of^(76)Ge.A total of 504.3 kg⋅day effective exposure data was *** anti-coincidence and the multi/single-site event(MSE/SSE)discrimination methods were used to suppress the background in the energy region of interest(ROI,1989–2089 keV for this work)with a factor of 23.A background level of 0.33 counts/(keV⋅kg⋅yr)was *** lower limit on the half life of^(76)Ge 0νββdecay was constrained as T_(1/2)^(0ν)>1.0×10^(23)yr(90%C.L.),corresponding to the upper limits on the effective Majorana neutrino mass:3.2–7.5 eV.

关键词： neutrinoless double beta decay CDEX point-contact germanium detector ^(76)Ge

Thermomechanical properties of an energy micro pile-raft foundation in silty clay

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Underground Space 2021年第1期6卷 76-84页

作者： gang-qiang Kong Te Cao Yao-hu Hao Yang Zhou Lian-wei ren College of Civil and transportation Engineering Hohai UniversityNanjingJiangsu 210098China Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education China Three Gorges UniversityYichangHubei 443002China Shanxi transportation Research Institute TaiyuanShanxi 030006China school of Civil Engineering Henan Polytechnic UniversityJiaozuoHenan 454000China

Micro steel pipe pile was used for existing foundation reinforcement and *** energy micro pile-raft foundation equipped with heat exchange tube was constructed in silty *** diameter and the length of the energy micro pile are 160 mm and 13.0 m,respectively.A series of in situ thermal performance tests were carried out by controlling cycle heating,in which the inlet and outlet water temperatures,flow rate,and thermomechanical properties of the energy micro pile were *** with a numerical simulation method,the thermomechanical stresses and displacement of the raft were also analyzed and *** energy micro pile-raft foundation was also analyzed for different combinations of energy piles and nonenergy piles in the *** show that the micro pile-raft foundation can provide sufficient heat exchange compared with other types of ground heat *** settlement at both the pile top and tip were observed for the groups that contained both energy piles and nonenergy piles.

关键词： Energy pile Micro pile-raft foundation Thermomechanical properties Silty clay Field test

Application of metagenomics in the human gut microbiome

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World Journal of Gastroenterology 2015年第3期21卷 803-814页

作者： wei-Lin wang Shao-Yan Xu Zhi-gang ren Liang Tao Jian-Wen Jiang Shu-Sen Zheng Department of Hepatobiliary and Pancreatic Surgery First Affiliated HospitalZhejiang University School of Medicine

There are more than 1000 microbial species living in the complex human *** gut microbial community plays an important role in protecting the host against pathogenic microbes,modulating immunity,regulating metabolic processes,and is even regarded as an endocrine ***,traditional culture methods are very limited for identifying *** the application of molecular biologic technology in the field of the intestinal microbiome,especially metagenomic sequencing of the next-generation sequencing technology,progress has been made in the study of the human intestinal *** can be used to study intestinal microbiome diversity and dysbiosis,as well as its relationship to health and ***,functional metagenomics can identify novel functional genes,microbial pathways,antibiotic resistance genes,functional dysbiosis of the intestinal microbiome,and determine interactions and co-evolution between microbiota and host,though there are still some ***,metaproteomics and metabolomics represent enormous complements to the understanding of the human gut *** review aims to demonstrate that metagenomics can be a powerful tool in studying the human gut microbiome with encouraging *** limitations of metagenomics to be overcome are also ***,metaproteomics and metabolomics in relation to the study of the human gut microbiome are also briefly discussed.

关键词： Human gut microbiome Metabolomics Metagenomics Met

Revisiting the mechanisms of mid-Tertiary uplift of the NE Tibetan Plateau

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National Science Review 2023年第4期10卷 169-190页

作者： Hong-Hong wei Guo-Li Wu Lin Ding Long-gang Fan Lin Li Qing-ren Meng State Key Laboratory of Tibetan Plateau Earth System Environment and Resources (TPESER) Institute of Tibetan Plateau Research Chinese Academy of Sciences Institute of Geomechanics Chinese Academy of Geological Sciences State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Department of Geosciences University of Arizona University of Chinese Academy of Sciences

Contrasting views exist on timing and mechanisms of Tertiary crustal uplift in the NE Tibetan Plateau based on different approaches, with many models atributing surface uplift to crustal shortening. We carry out a comprehensive investigation of mid-Tertiary stratigraphy, sedimentology, and volcanism in the West Qinling, Hoh Xil and Qaidam basin, and the results challenge previous views. It was held that the discordance between Oligocene and Miocene strata is an angular unconformity in the West Qinling, but our field observations show that it is actually a disconformity, indicative of vertical crustal uplifting rather than crustal shortening at the Oligocene to Miocene transition. Widespread occurrence of synsedimentary normal faults in mid-Tertiary successions implicates supracrustal stretching. Miocene potassic–ultrapassic and mafic–ultramafic volcanics in the Hoh Xil and West Qinling suggest a crucial role of deep thermomechanical processes in generating crust-and mantle-sourced magmatism. Also noticeable are the continuity of mid-Tertiary successions and absence of volcanics in the Qaidam basin. Based on a holistic assessment of stratigraphic–sedimentary processes, volcanic petrogenesis, and spatial variations of lithospheric thicknesses, we speculate that small-sale mantle convection might have been operating beneath northeast Tibet in the mid-Tertiary. It is assumed that northward asthenospheric flow was impeded by thicker cratonic lithosphere of the Qaidam and Alxa blocks, thereby leading to edge convection. The edge-driven convection could bring about surface uplift, induce supracrustal stretching, and trigger vigorous volcanism in the Hoh Xil and West Qinling in the mid-Tertiary period. This mechanism satisfactorily explains many key geologic phenomena that are hardly reconciled by previous models.

关键词： NE Tibetan Plateau mid-Tertiary unconformity volcanism edge convection

Calculation of phase equilibria in Al-Fe-Mn ternary system involving three new ternary intermetallic compounds

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Advances in Manufacturing 2018年第2期6卷 247-257页

作者： Lu-Hai Zhou Zhu L Shu-Sen wang ren-Min Hu Shi-Hua wang Zi-wei Qin Xiong-gang Lu Chong-He Li State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy & school of Materials Science and Engineering Shanghai University Shanghai University Shanghai 200072 People's Republic of China Shanghai Special Casting Engineering Technology Research Center Shanghai 201605 People's Republic of China Baosteel Special Steel Co. Ltd. Shanghai 200940 People's Republic of China

In this study, the Al-Fe-Mn ternary system is reassessed by the CALPHAD method. Three new ternary intermetallic compounds are initially described and a rea- sonable and self-consistent set of thermodynamic parameters are established to describe this system. The 973 K, 1 073K, 1 173K, 1 273K, 1 373K, and 1 473K isothermal sections and the 1 073 K, 1 013 K, 968 K and 913 K isothermal sections at the AI corner as well as the liquidus projection at the Al corner are calculated. It is shown that the calculated results are in good agreement with almost all of the experimental results previously reported.

关键词： Al-Fe-Mn - CALPHAD Phase equilibria Isothermal sections

A HYBRID GREY MARKOV PREDICTION MODEL FOR TRAFFIC VOLUME

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A HYBRID GREY MARKOV PREDICTION MODEL FOR TRAFFIC VOLUME

Process Analysis of Double Circuit Transmission Line Trip-out on the Same Tower Due to Lightning

第一届交通运输工程国际学术会议

作者： Shuyan Chen 12, wei wang 1, Gaofeng Qu2, and gang ren1 1College of transportation, Southeast University, Nanjing, Sipailou 2 2 College of Automation, Nanjing University of Posts and Telecommunications, Nanjing, Xinmofan road 66

A hybrid Grey Markov prediction model was developed by incorporating Markov forecasting model into grey forecasting model, and it was used to address the problem of traffic volume prediction. This compound model predicts the general trend of original data with unified-dimension new message GM（1,1）, then applies first order Markov model to forecast the relative error series, finally use the forecasting relative error data to amend GM（1,1） prediction results. To confirm the applicability of this model, we employed Grey Markov forecasting model to forecast real time traffic volume of an intersection in SUZHOU city. As verified in experimental results, the Grey Markov model is overmatched GM（1,1） for traffic volume forecasting.

关键词： traffic volume forecasting Grey Markov

来源： cnki会议评论

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高压电器 2011年第9期47卷 31-36,43页

作者： DUAN Da-peng ren Zhi-gang wang Peng YE Kuan CHANG Xiao-qi LI wei Beijing Electric Power Research Institute Beijing 100075 China

In recent years,several failures of double circuit transmission line on the same tower due to lightning were happened in Beijing power *** it can be reclosed successful,the lightning strike caused a grave threat to the power grid *** cause of the accident and the accident process were studied for the sake of further understanding of the impact of lightning on power *** an example,110 kV double circuit transmission line(Xilong-line) was *** first,the system topology was *** the analysis on relay protection actions and the fault recorder data,over voltage on the insulator strings was *** on the analysis and the calculation,accident cause and the process were presented ***,it comes to the conclusion that the lightning failure was caused by *** wave of the lightning over voltage would spread to the not grounded neutral point of the transformers,and make the neutral protective gap breakdown,then cause freewheeling with the frequency of 50 *** results of the relay protection,the double circuit transmission line all tripped ***,the causes of the accident were proposed that included terrain features,large corner towers,strong thunderstorm weather and poor grounded contact of the tower.

关键词： double circuit transmission lines on the same tower lightning trip-out at the same time fault recorder over-voltage calculation lightning protection

Using Reduced Graphene Oxide to Generate Q-Switched Pulses in Er-Doped Fiber Laser

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Chinese Physics Letters 2018年第11期35卷 32-34页

作者： Lu Li Rui-Dong Lv Si-Cong Liu Zhen-Dong Chen Jiang wang Yong-gang wang wei ren school of Science Xi＇an University of Posts and TelecommunicationsXi＇an 710121 school of Physics and information Technology Shaanxi Normal UniversityXi＇an 710119 Shaanxi Key Laboratory of Information Communication Network and Security Xi＇an University of Posts and TelecommunicationsXi＇an 710121

Using the reduced graphene oxide（rGO） as a saturable absorber（SA） in an Er-doped fiber（EDF） laser cavity,we obtain the Q-switching operation. The rGO SA is prepared by depositing the GO on fluorine mica（FM） using the thermal reduction method. The modulation depth of rGO/FM is measured to be 3.2%. By incorporating the rGO/FM film into the EDF laser cavity, we obtain stable Q-switched pulses. The shortest pulse duration is3.53 μs, and the maximum single pulse energy is 48.19 nJ. The long-term stability of working is well *** experimental results show that the rGO possesses potential photonics applications.

关键词： EDF GO Using Reduced Graphene Oxide to Generate Q-Switched Pulses in Er-Doped Fiber Laser SA

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基于随机充电需求的充电桩优化双层模型

吉林大学学报（工学版） 2024年第8期54卷 2238-2244页

作者：闫云娟查伟雄石俊刚严丽平华东交通大学机电与车辆工程学院江西南昌330013 华东交通大学交通运输与物流学院江西南昌330013 华东交通大学软件学院江西南昌330013

在具有随机充电需求的混合交通网络里,为确定合理的充电桩配置数,构建了双层规划模型。上层模型以建设成本净现值、顾客流失成本、超出忍耐时间成本之和最小为目标;下层模型以用户广义出行成本最小为目标,描述路网流量分配与充电设施部... 详细信息

在具有随机充电需求的混合交通网络里,为确定合理的充电桩配置数,构建了双层规划模型。上层模型以建设成本净现值、顾客流失成本、超出忍耐时间成本之和最小为目标;下层模型以用户广义出行成本最小为目标,描述路网流量分配与充电设施部署位置的相互作用。模型利用差分进化算法与Frank-Wolfe算法相嵌套进行网络均衡配流及充电桩配置寻优仿真。结果表明:模型能有效模拟和预测网络均衡交通流、随机充电流、排队损失率和充电桩最优配置数。

关键词：交通运输规划与管理双层规划模型 Frank-Wolfe算法差分进化算法充电桩配置