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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

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 Sino-French Institute of Nuclear and Technology Sun Yet-sen University School of Physics Nankai University Department of Physics Banaras Hindu University Department of Physics Beijing Normal University Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics Tsinghua University Department of Physics Tsinghua University Institute of Physics Academia Sinica Taipei NUCTECH Company YaLong River Hydropower Development Company College of Nuclear Science and Technology Beijing Normal University College of Physics Sichuan University School of Physics Peking University Department of Nuclear Physics China Institute of Atomic Energy

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 1×1015to 7×1016g 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 sectionσχe～5×10-29cm2forχwith a mass mχ0.1 ke V from our *** the higher radiation background but lower energy threshold （160 eV）,CDEX-10 fills a part of the gap in the previous *** (mχ,σχe) can be determined in the future,DD experiments are expected to impose strong constraints on fPBHfor large MPBHs.

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MLDA:a multi-level k-degree anonymity scheme on directed social network graphs

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Frontiers of Computer Science 2024年第2期18卷 199-215页

作者： yuanjing HAO Long li liang CHANG Tianlong GU Guangxi Key Laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China Engineering Research Center of Trustworthy AI(Ministry of Education) Jinan UniversityGuangzhou 510632China

With the emergence of network-centric data,social network graph publishing is conducive to data analysts to mine the value of social networks,analyze the social behavior of individuals or groups,implement personalized recommendations,and so ***,published social network graphs are often subject to re-identification attacks from adversaries,which results in the leakage of users’***-anonymity technology is widely used in the field of graph publishing,which is quite effective to resist re-identification ***,the current researches still exist some issues to be solved:the protection of directed graphs is less concerned than that of undirected graphs;the protection of graph structure is often ignored while achieving the protection of nodes’identities;the same protection is performed for different users,which doesn’t meet the different privacy requirements of ***,to address the above issues,a multi-level-degree anonymity(MLDA)scheme on directed social network graphs is proposed in this ***,node sets with different importance are divided by the firefly algorithm and constrained connectedness upper approximation,and they are performed different-degree anonymity protection to meet the different privacy requirements of ***,a new graph anonymity method is proposed,which achieves the addition and removal of edges with the help of fake *** addition,to improve the utility of the anonymized graph,a new edge cost criterion is proposed,which is used to select the most appropriate edge to be ***,to protect the community structure of the original graph as much as possible,fake nodes contained in a same community are merged prior to fake nodes contained in different *** results on real datasets show that the newly proposed MLDA scheme is effective to balance the privacy and utility of the anonymized graph.

关键词： directed social network graph graph publishing k-degree anonymity community structure graph utility

汉氏葡糖醋杆菌Komagataeibacter hansenii HDM1-3不同发酵时间的转录组测序分析

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黑龙江大学自然科学学报 2024年第3期41卷 321-331页

作者：邱永杰李元敬郭丹雷虹李文辉黑龙江大学农业微生物技术教育部工程研究中心哈尔滨150500 黑龙江大学生命科学学院黑龙江省寒地生态修复与资源利用重点实验室哈尔滨150080 华南师范大学汕尾校区材料与新能源学院汕尾516600

为了探究汉氏葡糖醋杆菌HDM1-3(Komagataeibacter hansenii HDM1-3)在不同发酵时间的差异基因表达水平,挖掘差异表达基因在细菌纤维素(Bacterial cellulose,BC)生物合成代谢相关基因中的功能,利用Illumina HiSeq平台对发酵前期(18 h)和... 详细信息

为了探究汉氏葡糖醋杆菌HDM1-3(Komagataeibacter hansenii HDM1-3)在不同发酵时间的差异基因表达水平,挖掘差异表达基因在细菌纤维素(Bacterial cellulose,BC)生物合成代谢相关基因中的功能,利用Illumina HiSeq平台对发酵前期(18 h)和发酵后期(36 h)的Komagataeibacter hansenii HDM1-3菌株进行转录组测序分析,通过荧光定量PCR验证转录组测序结果的准确性,通过GO富集和KEGG富集分析差异表达基因。转录组测序共获得3154个CDS序列,其中57个未被注释,注释率达98.22%。差异表达基因分析表明,菌株HDM1-3发酵36 h相比于发酵18 h,共有684个显著性差异表达基因,其中上调基因369个(53.9%),下调基因315个(46.1%)。GO功能富集分析结果表明,发酵后期碳水化合物代谢相关功能基因下调,而细胞膜相关功能基因上调。KEGG富集分析结果表明,主要的能量代谢途径,包括糖酵解途径、磷酸戊糖途径和柠檬酸循环都显著下调,两个BC合成酶基因显著上调。这些结果为进一步分析HDM1-3菌株BC合成相关基因、提高BC产量的研究提供理论参考。

关键词：汉氏葡糖醋杆菌HDM1-3 差异表达基因荧光定量PCR 细菌纤维素

“三全育人”视域下城市轨道交通专业课程思政元素融入路径探析

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时代汽车 2024年第8期 75-77页

作者：孙泽敏郎晓辉汤棣炜衡丽娜李媛婧内蒙古交通职业技术学院内蒙古赤峰市024005

“三全育人”是全面贯彻党的教育方针和落实立德树人根本任务的关键举措,在“三全育人”视域下实现课程思政改革是高校教育的新发展趋势。以高职院校城市轨道交通专业为载体,为实现德技双馨的育人目标,围绕全员育人、全程育人及全方位... 详细信息

“三全育人”是全面贯彻党的教育方针和落实立德树人根本任务的关键举措,在“三全育人”视域下实现课程思政改革是高校教育的新发展趋势。以高职院校城市轨道交通专业为载体,为实现德技双馨的育人目标,围绕全员育人、全程育人及全方位育人探索高职院校城市轨道交通类课程思政元素融入路径,以期培养适应城轨行业新趋势下的复合型人才需求。

关键词：三全育人城市轨道交通课程思政思政元素

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黑木耳黑色素酸奶的研制及其抗氧化活性

黑龙江大学自然科学学报 2024年第1期41卷 79-89页

作者：王雨亭黄包卿楚福英曾伟民施树良李元敬雷虹冯磊黑龙江大学生命科学学院黑龙江省普通高校分子生物学重点实验室哈尔滨150080 黑龙江大学农业微生物技术教育部工程研究中心哈尔滨150500 哈尔滨工业大学生命科学与技术学院哈尔滨150001 华南师范大学汕尾校区材料与新能源学院汕尾516600 黑龙江省林业科学院科研处哈尔滨150081

黑色素作为黑木耳主要生物活性成分之一,具有较强的抗氧化性能。在酸奶中添加了黑木耳黑色素,进行了工艺优化,包括单因素及正交试验。获得的最佳制备工艺参数为:黑木耳黑色素添加量10%、菌种添加量10%、发酵时间5.0 h。用此工艺参数制... 详细信息

黑色素作为黑木耳主要生物活性成分之一,具有较强的抗氧化性能。在酸奶中添加了黑木耳黑色素,进行了工艺优化,包括单因素及正交试验。获得的最佳制备工艺参数为:黑木耳黑色素添加量10%、菌种添加量10%、发酵时间5.0 h。用此工艺参数制得的酸奶色泽正常,呈淡灰色,组织状态均匀细腻,奶香浓郁,酸甜比例适宜,感官评分为95分。同时,测得其黏稠度为74.23 g,储藏期为13 d,抗氧化能力及乳酸菌总数指标也均高于未加黑木耳黑色素的酸奶。该酸奶营养丰富,有更高的保健功能和饮用价值,增加了人们对市售酸奶的选择。

关键词：黑木耳黑色素酸奶工艺抗氧化性储藏期

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A practical soil radon(^(222)Rn) measurement method

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Nuclear Science and Techniques 2010年第3期21卷 182-186页

作者： DING Weicheng WANG Yi li yuanjing FANG Fang YANG liu Department of Engineering Physics Tsinghua University Key Laboratory of Particle & Radiation Imaging Ministry of Education Beijing 100084 China Chengdu University of Technology Key Laboratory of Applied Nuclear Technology in Geosciences Chengdu 610069 China

Soil radon measurement of high stability and sensitivity is widely applied,and in some applications,such as in uranium prospecting,^(222)Rn should be distinguished from ^(220)*** meet this requirement,a practical method based on soil radon diffusion and accumulation theory to measure soil radon by Alpha Particle Spectroscopy(α-PS)is discussed in this ***α-PS measurement method can effectively overcome the effects of ^(220)Rn and its daughters (^(216)Po,^(212)Bi,^(212)Po).The system can eliminate the impact of soil radon field disturbance and non-uniformity through soil radon static *** daughters(^(218)Po,^(214)Po)are accumulated under the action of an electrostatic force, which not only enhances the measurement sensitivity,but also increases robustness of the *** measurement of multiple points can increase the comparability of measurement data and the measurement efficiency. Experimental data shows that the soil radon measurement method was *** it has wide applications such as in geological prospecting,in fissure groundwater exploration and in ground subsidence inspection.

关键词：测量方法氡气场土壤测量灵敏度地下水勘查铀矿勘探非均匀性测量数据

Neglected Time Intervals Before “1-3-7” Approach About Imported Malaria Cases-China, 2014–2021

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China CDC weekly 2024年第17期6卷 363-367页

作者： Zhiquan He yuanjing Kou Dan Wang Ying liu Xiaofeng Lyu Hui Yan Wen lin Xuan Zhang Duoquan Wang Shizhu li Hongwei Zhang Henan Provincial Center for Disease Control and Prevention Zhengzhou CityHenan ProvinceChina Anhui Provincial Center for Disease Control and Prevention Hefei CityAnhui ProvinceChina Guangxi Zhuang autonomous Region Center for Disease Control and Prevention Nanning CityGuangxi Zhuang Autonomous RegionChina Hubei Provincial Center for Disease Control and Prevention Wuhan CityHubei ProvinceChina Zhejiang Provincial Center for Disease Control and Prevention Hangzhou CityZhejiang ProvinceChina National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention(Chinese Center for Tropical Diseases Research)National Health Commission Key Laboratory of Parasite and Vector BiologyShanghaiChina School of Global Health Chinese Center for Tropical Diseases ResearchShanghai Jiao Tong University School of MedicineShanghaiChina

Summary What is already known about this topic?China’s“1-3-7”approach outlines specific targets to guide and monitor the processes of case reporting,investigation,and ***,few studies have examined the time intervals preceding the initial step,and the timeline from the arrival of imported malaria cases in China to their diagnosis has been largely *** is added by this report?The study demonstrated that the median duration from arrival in China to the onset of symptoms for *** was 78 days,with 71.59%of imported cases manifesting symptoms after more than one *** ***,the median interval was 42 days,with 55.91%exceeding one ***,the median time from symptom onset to malaria treatment in China between 2014 and 2021 was 2 days,with an interquartile range(IQR)of 1-4 *** are the implications for public health practice?This study represents the initial effort to delineate the chronology of imported malaria cases,from their arrival in China to their subsequent *** results underscore the importance of providing malaria health education to populations arriving from ***,enhancing physician training is crucial for improving the diagnosis of malaria.

关键词： diagnosis Malaria exceeding

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纳米比亚萤石的荧光特征

宝石和宝石学杂志（中英文） 2023年第1期25卷 21-27页

作者：李远静沈锡田中国地质大学(武汉)珠宝学院湖北武汉430074 湖北省珠宝工程技术研究中心湖北武汉430074

产自纳米比亚的紫黄色萤石具有特殊颜色分区和棱柱状包裹体,其紫色的环带结构在长波紫外光下发出较强的紫蓝色荧光。为研究纳米比亚的紫黄色萤石的荧光特征,采用显微观察与拍照、电感耦合等离子体质谱仪(ICP-MS)、激光拉曼光谱仪和荧光... 详细信息

产自纳米比亚的紫黄色萤石具有特殊颜色分区和棱柱状包裹体,其紫色的环带结构在长波紫外光下发出较强的紫蓝色荧光。为研究纳米比亚的紫黄色萤石的荧光特征,采用显微观察与拍照、电感耦合等离子体质谱仪(ICP-MS)、激光拉曼光谱仪和荧光光谱仪对其进行了测试。对纳米比亚紫黄色萤石样品不同颜色部分进行ICP-MS检测,结果显示紫色部分稀土元素浓度高于黄色部分,从元素种类来看其中稀土元素Ce和Y浓度较高,且紫色部分所含Ce的浓度是黄色部分的两倍。拉曼光谱显示除了萤石特征峰外,还有多个强度不定的谱峰归属于稀土元素Er;综合三维荧光光谱和光致发光光谱的结果,激发波长和发射波长(Ex/Em)范围为310 nm/320 nm处和310 nm/340 nm处有荧光强度极强的Ce^(3+)的发光中心。综合各类光谱和微量元素含量分析,纳米比亚紫黄色萤石样品的特征蓝紫色荧光由稀土元素Ce产生。

关键词：萤石荧光三维荧光光谱稀土元素纳米比亚

Monte-Carlo simulation of cement neutron field distribution characteristics in PGNAA

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Nuclear Science and Techniques 2012年第6期23卷 337-343页

作者： YANG Jianbo YANG Yigang li yuanjing TUO Xianguo li Zhe liU Mingzhe CHENG Yi MU Keliang WANG Lei Department of Engineering Physics Tsinghua University Chengdu University of Technology State Key Laboratory of Geohazard prevention & Geoenvironment Protection Nuclear Power Institute of China

The distribution characteristics of the neutron field in cement was simulated using the MCNP code to comply with the requirements of an online Prompt Gamma Neutron Activation Analysis *** results showed that the neutron relative flux proportion reduced with increasing cement *** the cement thickness remains unchanged,the reduced proportion of thermal neutrons increases to a small extent,but the epithermal, intermediate,and fast neutrons will decrease according to the geometric progression.H element in the cement mainly affects the reduction of fast neutrons and other single-substance elements,e.g.,O,Ca,56Fe,Si,and *** also slows down the reduction of the fast neutrons via inelastic scattering.O contributes more than other elements in the reduction of fast *** the H content affects the thermal,epithermal,intermediate,and fast neutrons, while changing the Ca,Fe,and Si contents only influences the thermal,epithermal,and intermediate neutrons;hence, there is little effect on the reduction of fast neutrons.

关键词：蒙特卡罗模拟中子活化 PGNAA 水泥特征场分布在线分析系统 MCNP程序