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Probing dark matter particles from evaporating primordial black holes via electron scattering in the CDEX-10 experiment

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 83-91页

作者： Zhenhua Zhang Litao Yang Qian Yue Kejun Kang Yuanjing Li Haipeng An Greeshma C. jianping chang Yunhua Chen jianping Cheng Wenhan Dai Zhi Deng changhao Fang Xinping Geng Hui Gong Qiuju Guo Tao Guo Xuyuan Guo Li He Shengming He Jinwei Hu Hanxiong Huang Tuchen Huang Lin Jiang S.Karmakar Haubin Li Hanyu Li Jianmin Li Jin Li Qianyun Li Renmingjie Li Xueqian Li Yulan Li Yifan Liang Bin Liao FongKay Lin ShinTed Lin Jiaxuan Liu Shukui Liu Yandong Liu Yu Liu Yuanyuan Liu Hao Ma Yucai Mao Qiyuan Nie Jinhua Ning Hui Pan Ningchun Qi Jie Ren Xichao Ruan Monoj Kumar Singh Tianxi Sun changjian Tang Yang Tian Guangfu Wang Junzheng Wang Li Wang Qing Wang Yufeng Wang Yunxiang Wang Henry Tsz-King Wong Shiyong Wu Yucheng Wu Haoyang Xing Rui Xu Yin Xu Tao Xue Yulu Yan Nan Yi Chunxu Yu Haijun Yu Jianfeng Yue Ming Zeng Zhi Zeng Bingtao Zhang Fengshou Zhang Lei Zhang Zhenyu Zhang Jizhong Zhao Kangkang Zhao Minggang Zhao Jifang Zhou Zuying Zhou Jingjun Zhu CDEX Collaboration Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and Department of Engineering Physics Tsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China Institute of Physics Academia SinicaTaipei 11529China NUCTECH Company Beijing 100084China YaLong River Hydropower Development Company Chengdu 610051China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China College of Physics Sichuan UniversityChengdu 610065China School of Physics Peking UniversityBeijing 100871China Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413China Sino-French Institute of Nuclear and Technology Sun Yet-sen UniversityZhuhai 519082China School of Physics Nankai UniversityTianjin 300071China Department of Physics Banaras Hindu UniversityVaranasi 221005India Department of Physics Beijing Normal UniversityBeijing 100875China 不详

Dark matter(DM)is a major constituent of the ***,no definite evidence of DM particles(denoted as“χ”)has been found in DM direct detection(DD)experiments to *** is a novel concept of detectingχfrom evaporating primordial black holes(PBHs).We search forχemitted from PBHs by investigating their interaction with target *** examined PBH masses range from 1×10^(15)to 7×10^(16)g under the current limits of PBH abundance *** 205.4 kg·day data obtained from the CDEX-10 experiment conducted in the China Jinping Underground Laboratory,we exclude theχ-electron(χ-e)elastic-scattering cross sectionσ_(χe)~5×10^(-29)cm^(2)forχwith a mass■keV from our *** the higher radiation background but lower energy threshold(160 eV),CDEX-10 fills a part of the gap in the previous ***(m_(χ),σ_(χe))can be determined in the future,DD experiments are expected to impose strong constraints on fPBHfor large MPBHs.

关键词： CDEX primordial black hole light dark matter particle dark matter-electron scattering high purity germanium detector

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矿井煤自燃防灭火材料阻燃机理综述

内蒙古科技大学学报 2024年第3期43卷 226-229页

作者：姜小龙孙明常建平董红娟内蒙古科技大学矿业与煤炭学院内蒙古包头014010

矿井煤自燃是最为常见且影响巨大的矿井火灾类型,严重制约我国煤矿安全开采,威胁工作人员生命安全,并造成环境污染和资源的极大浪费。尽管矿井防灭火技术得到长足的发展,但矿井煤自燃火灾防控形势依然严峻,不同矿井或开采区域煤自燃的... 详细信息

矿井煤自燃是最为常见且影响巨大的矿井火灾类型,严重制约我国煤矿安全开采,威胁工作人员生命安全,并造成环境污染和资源的极大浪费。尽管矿井防灭火技术得到长足的发展,但矿井煤自燃火灾防控形势依然严峻,不同矿井或开采区域煤自燃的影响因素多且复杂,所使用的防灭火材料不同,阻燃机理也各不相同,综述了注浆、惰气、阻化剂、凝胶、泡沫等防灭火材料的阻燃机理,并提出了矿井防灭火材料阻燃机理的研究方向,为矿井煤自燃防灭火材料领域的研究提供参考。

关键词：矿井煤自燃防灭火材料阻燃机理

半肝切除术后发生肝功能不全的早期相关因素列线图模型构建与验证

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中华外科杂志 2024年第1期62卷 49-56页

作者：张搏伦毕新宇赵宏畅建平张笑时徐博文赵建军周健国蔡建强国家癌症中心、国家肿瘤临床医学研究中心、中国医学科学院北京协和医学院肿瘤医院肝胆外科北京100021

目的探讨肝肿瘤患者半肝切除后发生肝功能不全的早期相关因素,利用早期相关因素建立列线图模型并验证其准确性。方法本研究为回顾性队列研究。回顾性收集2016年10月至2022年12月在中国医学科学院肿瘤医院肝胆外科行半肝切除的207例肝肿... 详细信息

目的探讨肝肿瘤患者半肝切除后发生肝功能不全的早期相关因素,利用早期相关因素建立列线图模型并验证其准确性。方法本研究为回顾性队列研究。回顾性收集2016年10月至2022年12月在中国医学科学院肿瘤医院肝胆外科行半肝切除的207例肝肿瘤患者资料。采用随机数字法,按照4∶1比例将患者随机分成建模组(n=166)与验证组(n=41)。建模组中男性118例,女性48例,年龄[M(IQR)]59.0(13.3)岁(范围:22.0~81.0岁),术后肝功能不全组42例、无肝功能不全组124例。验证组中男性32例,女性9例,年龄54.0(19.0)岁(范围:25.0~81.0岁)。收集患者术后24 h内第1次的实验室检查结果,通过多因素Logistic回归分析半肝切除术后发生肝功能不全的独立相关因素,采用最优子集法筛选术后肝功能不全的相关因素。利用R软件构建半肝切除术后发生肝功能不全风险的列线图模型,并对模型进行内部与外部验证。结果多因素Logistic回归分析结果显示,术后24 h内D-二聚体升高及抗凝血酶Ⅲ活性降低是半肝切除术后患者发生肝功能不全的独立相关因素(P值均<0.05)。最优子集结果显示,术后24 h内的ALT水平、D-二聚体水平及抗凝血酶Ⅲ活性是术后发生肝功能不全的最相关因素。在建模组中建立基于以上3个指标的列线图预测模型,模型的受试者工作特征(ROC)曲线的曲线下面积为0.803,校准曲线U指数为-0.012(P=0.977)。临床决策曲线与临床影响曲线结果表明,该模型有良好的临床应用价值。Bootstrap法内部验证结果提示模型的一致性尚可。验证组模型的ROC曲线的曲线下面积为0.806,提示该模型具有较好的泛化预测能力。结论术后24 h内的ALT水平、D-二聚体水平及抗凝血酶Ⅲ活性是半肝切除术后预测肝功能不全有价值的指标,构建的列线图预测模型较可靠,建议术后对以上3个指标进行严密监测。

关键词：肝肿瘤肝切除术术后肝功能不全早期相关因素列线图模型

Localization of BGP Indonesia International Business

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China Oil & Gas 2018年第4期25卷 36-38页

作者： chang jianping International Exploration Division of BGP Inc. CNPC

In September 2013,President Xi Jinping proposed for the first time in Kazakhstan the joint building of the"Silk Road Ecoinomic Belt".On October 3,2013,on his visit to Indoinesia,Presicdent Xi addressed the Indonesian parliament,expressing China's willingness to strengthen umaritime cooperation with ASEAN countries,make good use of the China-ASEAN Maritime Cooperation Fund establishced by the Chinese government,develop a

关键词：印度尼西亚 BGP 本地化生意国际中国政府哈萨克斯坦经济带

BGP is Racing to the Commanding Heights of the Industry

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China Oil & Gas 2019年第1期26卷 37-42页

作者： Zhao Jixue chang jianping BGP

On March 28th, 2018, in the BINTUNI BAY sea area of eastern Indonesia, with the last explosion and the successful collection of the last node, the Indonesia Ocean-Bottom Node (OBN) Project of British Petroleum(BP) concluded safely and successfully after 8 months of intense production. Highly regarded in the industry, this project was undertaken by BGP.

关键词： BINTUNI BAY Industry Indonesia

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原发性肝细胞癌伴盆腔转移转化治疗1例报告

中华转移性肿瘤杂志 2024年第1期7卷 52-55页

作者：畅建平徐博文李智宇张业繁毕新宇国家癌症中心/国家肿瘤临床研究中心/中国医学科学院北京协和医学院肿瘤医院肝胆外科北京100021

本文报道了1例原发性肝细胞癌伴少见盆腔转移患者的诊治经过。该患者首先入组了我院的一项临床研究, 治疗方案为靶向治疗联合免疫治疗(仑伐替尼联合HX008), 共22个周期。经靶向治疗联合免疫治疗后血清甲胎蛋白明显降低, CT及MRI评估均... 详细信息

本文报道了1例原发性肝细胞癌伴少见盆腔转移患者的诊治经过。该患者首先入组了我院的一项临床研究, 治疗方案为靶向治疗联合免疫治疗(仑伐替尼联合HX008), 共22个周期。经靶向治疗联合免疫治疗后血清甲胎蛋白明显降低, CT及MRI评估均提示肿瘤显著缩小达部分缓解, 后续顺利完成原发灶及转移灶的同期根治性切除。目前该患者已获得23个月的生存时间, 经复查无复发及远处转移征象。该例患者的诊治经验提示在有效的全身治疗下可能会给晚期患者带来手术切除的机会, 但临床收治这类患者应仔细全面评估。随着全身治疗有效性的提高, 后续采取积极的根治性治疗手段, 可能会使更多的患者获益。

关键词：肝细胞癌盆腔转移靶向治疗免疫治疗根治性手术

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结肠癌并巨大肝转移瘤的林奇综合征1例

中华转移性肿瘤杂志 2024年第4期7卷 376-379页

作者：徐博文畅建平李智宇张业繁毕新宇国家癌症中心/国家肿瘤临床研究中心/中国医学科学院北京协和医学院肿瘤医院肝胆外科北京100021

本例确诊为林奇综合征的巨大结肠癌肝转移患者在初始交界可切除的情况下,通过肿瘤医院肝胆外科消化道肿瘤多学科团队(MDT)的积极干预,成功转化并接受了手术,术后继续行巩固治疗,患者持续获益。本文全方位报道了该患者的初始状况和整个... 详细信息

本例确诊为林奇综合征的巨大结肠癌肝转移患者在初始交界可切除的情况下,通过肿瘤医院肝胆外科消化道肿瘤多学科团队(MDT)的积极干预,成功转化并接受了手术,术后继续行巩固治疗,患者持续获益。本文全方位报道了该患者的初始状况和整个治疗过程,还原了各个阶段MDT讨论的依据和结果,充分体现了MDT诊疗在结肠癌肝转移患者治疗中的作用。

关键词：结肠癌肝转移化疗联合免疫治疗林奇综合征多学科团队

A prototype segmented planar high purity germanium detector using wraparound lithium diffusion electrode and amorphous germanium blocking contact

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Radiation Detection Technology and Methods 2022年第4期6卷 433-438页

作者： Mingxin Yang Yulan Li Zhi Zeng Yang Tian Tao Xue Ming Zeng Weiyou Tang jianping chang Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle&Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China

Purpose Segmented high purity germanium(HPGe)detectors have been used in many experiments to measure the position and energy deposition of gamma ray ***ﬁcant efforts have been made to optimize the design and simplify the fabrication *** germanium(aGe)coating is a desirable method to realize blocking contact and facilitate the *** In this study,a prototype segmented planar HPGe detector is fabricated using a wraparound lithium diffusion electrode for bias voltage applying and reliable mechanical mounting.A low leakage current design is realized based on conventional chemical polishing and aGe blocking.A guard ring(GR)is used to protect the metal strip electrodes within it from the surface leakage *** GR and strip electrodes are coated onto the aGe layer.A multichannel charge sensitive preampliﬁer is connected to the strip electrodes,and the signal waveforms are digitized using a multichannel 100 MS/s analog-to-digital *** and conclusion The charge collection time and amplitude are *** average energy resolution of 2 keV(full width at half maximum,FWHM)is realized at 662 *** collection is simulated via a Monte Carlo *** spatial resolution is also estimated using the *** front-end response and measured noise level are *** to the simulation results,sub-millimeter(FWHM at 122 keV)resolution can be achieved at the current noise level.

关键词： Segmented HPGe Amorphous germanium Guard ring Charge collection simulation

Acidic electroreduction CO_(2)to formic acid via interfacial modification of Bi nanoparticles at industrial-level current

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Nano Research 2024年第7期17卷 5817-5825页

作者： Tian Dong Hongdong Li Zhenhui Wang Yanling Geng Rui chang Xiaofeng Tian jianping Lai Shouhua Feng Lei Wang Key Laboratory of Eco-Chemical Engineering International Science and Technology Cooperation Base of Eco-Chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

Electrocatalytic CO_(2)reduction reaction(CO_(2)RR)in acidic media is a promising approach to overcome the unavoidable formation of carbonates in alkaline or neutral ***,the proton-rich environment near the catalyst surface favors hydrogen evolution reactions(HER),leading to lower energy efficiency of the desired products,especially in industrial-level current ***,quaternary ammonium cationic surfactant(cetyltrimethylammonium bromide(CTAB))was introduced into acidic electrolyte to modulate the interfacial microenvironment,which greatly enhanced CO_(2)electroreduction to formic acid(HCOOH)at the Bi/C nanoparticles *** a Bi/C nanoparticles electrode with CTAB added,constant production of formic acid was enabled with a cathodic energy efficiency of>40%and maximum FE_(HCOOH)(FE=Faradaic efficiency)of 86.2%at−400 mA·cm^(−2)over 24 *** with in-situ attenuated total reflection Fourier transform infrared spectroscopy,the concentration of*OCHO intermediates significantly increased after CTAB modification,confirming that the hydrophobic interface microenvironment formed by dynamic adsorption of positively charged long alkyl chains on Bi/C nanoparticle electrodes inhibited HER and improved the selectivity of CO_(2)RR to HCOOH.

关键词： acidic media CO_(2)electrolysis electrolyte additive hydrophobic interfacial microenvironment industrial-level current