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Spatio-temporal evolution and topographic gradient effect of land use and ecosystem service value in the Lhasa River Basin

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Journal of Mountain Science 2024年第6期21卷 2059-2074页

作者： zhou Jianwei FENG bin wu Hua XU Tong CHEN Linna ZHAO Xinyong guo Qiyun LI Jiatong ZHANG Chenguang ZHU Kangcheng KONG Yuzhong School of Ecology and Environment Tibet UniversityLhasa 850000China School of Engineering Tibet UniversityLhasa 850000China Joint Laboratory of Plateau Surface Remote Sensing Tibet UniversityLhasa 850000China

The Lhasa River Basin forms an essential human settlement area in the southern part of the Qinghai-Tibet *** study employed ecosystem service value(ESV)evaluation model,terrain gradient grading,and Geodetector to analyze land use and ESV in the Lhasa River Basin from 1985 to *** findings reveal that:(1)From 1985 to 2020,grassland was the dominant land *** was a trend of grassland reduction and the expansion of other land types.(2)ESV has increased over the research period(with a total increase of 0.84%),with higher values in the southeast and lower values in the *** contributed the most to ESV,and climate regulation and hydrological regulation were the ecosystem services that contribute the most to ESV.(3.Natural factors like NDVI and altitude,as well as economic factors like population density and distance from roads,influenced the spatial differentiation of ESV,the explanatory power of NDVI reached up to *** interaction between factors had a greater impact than individual *** research results can provide theoretical support for national spatial planning and ecological environment protection in the Lhasa River Basin and other similar areas.

关键词： Ecosystem services value Land use Terrain gradient effect Lhasa River Basin Driving factors

Geometries for possible kinematics

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Science china(physics,Mechanics & Astronomy) 2012年第11期55卷 1978-2003页

作者： huang chaoguang TIAN Yu wu XiaoNing XU Zhan zhou {3. institute of High Energy physics and Theoretical Physics Center for Science FacilitiesChinese Academy of SciencesBeijing 100049China Graduate University of chinese academy of sciences Beijing 100049China institute of Mathematics Academy of Mathematics and System SciencesChinese Academy of SciencesBeijing 100190China Department of physics Tsinghua UniversityBeijing 100084China Department of physics Beijing Normal UniversityBeijing 100875China

The physical and geometrical realizations of algebras for all possible Lorentzian and Euclidean kinematics with so(3. isotropy are presented in contraction approach and then *** geometries associated with these realizations are also obtained by the contraction *** relations among the geometries are *** geometries fall into *** exists t 1/(ν 2 t) correspondence in each *** the viewpoint of differential geometry,there are only 9 geometries,which have right signature and geometrical spatial *** are 3.relativistic geometries,3.absolute-time geometries,and 3.absolute-space geometries.

关键词： possible kinematics geometries contraction time duality

A draft sequence of the rice (Oryza sativa ssp. indica) genome

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chinese Science Bulletin 2001年第23期46卷 1937-1942页

作者： YU Jun, HU Songnian, WANG Jun,LI Songgang WONG Ka-Shu Gane, LIU bin,DENG Yajun, DAI Li, zhou Yan,ZHANG Xiuqing, CAO Mengliang, LIU Jing,SUN Jiandong , TANG Jiabin, CHEN Yanjiong,huang Xiaobing, LIN Wei, YE Chen, TONG Wei,CONG Lijuan, GENG Jianing, HAN Yujun, LI Lin,LI Wei, HU Guangqiang, huang Xiangang,LI Wenjie, LI Jian, LIU Zhanwei, LI Long,LIU Jianping, Ql Qiuhui, LIU Jinsong, LI Li,WANG Xuegang, LU Hong, wu Tingling,ZHU Miao, Nl Peixiang, HAN Hua, DONG Wei,REN Xiaoyu, FENG Xiaoli, GUI Peng,LI Xianran, WANG Hao, XU Xin, ZHAI Wenxue,XU Zhao, ZHANG Jinsong, HE Sijie,ZHANG Jianguo, XU Jichen, ZHANG Kunlin,ZHENG Xianwu, DONG Jianhai, ZENG Wanyong,TAO Lin, CHEN Xuewei, HE Jun, LIU Daofeng,TIAN Wei, TIAN chaoguang, XIA Hongai,LI Gang, GAO Hui, LI Ping, CHEN Wei ,WANG Xudong, ZHANG Yong, HU Jianfei,WANG Jing, LIU Song, YANG Jian,ZHANG Guangyu, XIONG Yuqing, LI Zhijie,MAO Long, zhou Chengshu, ZHU Zhen,CHEN Runsheng, HAO Bailin,ZHENG Weimou, CHEN Shouyi, QUO Wei,LI guojie, LIU Siqi, huang Guyang,TAO Ming, WANG Jian, ZHU Lihuang,YUAN Longping& YANG HuanmingBeijing Genomics institute/Center of Genomics & Bioinformatics, chinese academy of sciences, Beijing 101300, china Hangzhou Genomics institute/institute of Bioinformatics of Zhejiang University/Key Laboratory of Bioinformatics of Zhejiang Province, Hangzhou 310007, china institute of Genetics, chinese academy of sciences, Beijing 100101, china National Hybrid Rice R & D Center, Changsha 410125, china Laboratory of Bioinformatics, institute of Biophysics, chinese academy of sciences, Beijing 100101, china College of Life sciences, Peking University, Beijing 100871, china institute of theoretical physics, chinese academy of sciences, Beijing 1Q0080, china Digital china Ltd., Beijing 100080, china institute of Computing Technology, chinese academy of sciences, Beijing 100080, china Medical College, Xi’an Jiaotong University, Xi’an 710061, chinaThese authors contributed equally to this work.Corresponding author.Corresponden Beijing Genomics institute/Center of Genomics & Bioinformatics Chinese Academy of Sciences Beijing China Hangzhou Genomics institute/institute of Bioinformatics of Zhejiang University/Key Laboratory of Bioinformatics of Zhejiang Province Hangzhou China College of Life sciences Peking University Beijing China Medical College Xi’an Jiaotong University Xi’an China institute of Genetics Chinese Academy of Sciences Beijing China Laboratory of Bioinformatics Institute of Biophysics Chinese Academy of Sciences Beijing China National Hybrid Rice R & D Center Changsha China institute of theoretical physics Chinese Academy of Sciences Beijing China Digital china Ltd. Beijing China institute of Computing Technology Chinese Academy of Sciences Beijing China

The sequence of the rice genome holds fundamental information for its biology, including physiology, genetics, development, and evolution, as well as information on many beneficial phenotypes of economic significance. Using a "whole genome shotgun" approach, we have pro-duced a draft rice genome sequence of Oryza sativa ssp. in-dica, the major crop rice subspecies in china and many other regions of Asia. The draft genome sequence is constructed from over 4.3.million successful sequencing traces with an accumulative total length of 2214.9 Mb. The initial assembly of the non-redundant sequences reached 409.76 Mb in length, based on 3.3. million successful sequencing traces with a total length of 1797.4 Mb from an indica variant cultivar 93.11, giving an estimated coverage of 95.29% of the rice genome with an average base accuracy of higher than 99%. The coverage of the draft sequence, the randomness of the sequence distribution, and the consistency of BIG-ASSEM-BLER, a custom-designed software package

关键词： rice genome draft sequences.

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 {3. Tuchen {3. 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

基于便携GC-MS和HS/SPME-GC×GC-TOF MS分析化州橘红与广西橘红成分差异

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质谱学报 2024年第5期45卷 631-639页

作者：李凯旋黄罗旭吴曼曼徐经纬谭国斌罗思凡周振暨南大学质谱仪器与大气环境研究所广东省大气污染在线源解析系统工程技术研究中心广东广州510632 华南理工大学环境与能源学院发光材料与器件国家重点实验室广东省大气环境与污染控制重点实验室广东广州510006 广东省麦思科学仪器创新研究院广东广州510530 广州禾信仪器股份有限公司广东广州510530

为探究不同产地橘红挥发性成分之间的差异,本研究采用便携气相色谱-质谱(GC-MS)和顶空固相微萃取结合全二维气相色谱-飞行时间质谱(GC×GC-TOF MS)技术分析化州橘红和广西橘红的挥发性成分。结果表明,便携GC-MS只能初步区分化州橘红和... 详细信息

为探究不同产地橘红挥发性成分之间的差异,本研究采用便携气相色谱-质谱(GC-MS)和顶空固相微萃取结合全二维气相色谱-飞行时间质谱(GC×GC-TOF MS)技术分析化州橘红和广西橘红的挥发性成分。结果表明,便携GC-MS只能初步区分化州橘红和广西橘红,不能确定化州橘红的特征标志物;利用主成分分析法(PCA)和正交偏最小二乘法(OPLS-DA)对GC×GC-TOF MS实验数据进行处理,根据|p(corr)|>9和|p|>0.06结合VIP>1.1,共筛选出10种化州橘红标志物。该研究为化州橘红药材的质量评价与鉴定提供了依据,也为其他中药质量评价提供了方法参考。

关键词：橘红便携气相色谱-质谱全二维气相色谱-飞行时间质谱(GC×GC-TOF MS) 顶空固相微萃取(HS/SPME) 化学计量学分析

基于CEEMDAN-VMD-BiGRU模型的印刷园区电力负荷预测

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印刷与数字媒体技术研究 2024年第4期 276-287页

作者：王国彬黄伟郭汶昇周锐顾晓晔吴乃月张育豪国网宁夏电力有限公司营销服务中心银川750004 中国电力科学研究院有限公司电网安全全国重点实验室北京100192 国网石嘴山供电公司计量中心石嘴山753000 北京印刷学院机电工程学院北京102600

为确保印刷园区绿色低碳运行,充分了解和预测电力负荷需求至关重要。然而,电力负荷预测面临数据复杂性、噪声干扰等问题,导致难以捕捉信号的非线性特征。为解决这一问题,本研究提出了基于CEEMDAN-VMD-BiGRU模型的印刷园区电力负荷预测... 详细信息

为确保印刷园区绿色低碳运行,充分了解和预测电力负荷需求至关重要。然而,电力负荷预测面临数据复杂性、噪声干扰等问题,导致难以捕捉信号的非线性特征。为解决这一问题,本研究提出了基于CEEMDAN-VMD-BiGRU模型的印刷园区电力负荷预测方法。首先,使用自适应噪声完备集合经验模态分解(CEEMDAN)对印刷园区电力负荷数据进行分解,并计算各模态分量的排列熵(PE)。其次,利用变分模态分解(VMD)对熵值高频模态分量进行二次分解,从而减弱序列的非平稳性。最后,使用各分量作为双向门控循环单元(BiGRU)预测模型的输入进行训练,将模型结果线性叠加,得到最终预测结果。以某印刷园区电力负荷数据为研究对象,对提出的模型进行与BiGRU模型、CEEMDAN-BiGRU模型预测结果的比较。实验结果表明:融合VMD方法的二次分解模型R2达到97.13.,RMSE为25.3.4,MAE为62.776,相较于其他模型,本研究提出的预测模型性能更佳。

关键词：二次分解 CEEMDAN VMD 印刷园区负荷预测

拍瓦级光参量啁啾脉冲放大系统中光参量相位演化研究

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中国激光 2024年第6期51卷 30-38页

作者：李纲周凯南朱斌谢娜卢峰蒋东镔郭仪黄征孙立杨雷巫殷忠刘红杰粟敬钦中国工程物理研究院激光聚变研究中心等离子体物理科学与技术实验室四川绵阳621900

在基于光参量啁啾脉冲放大的拍瓦级超短超强飞秒激光装置中,光参量相位是阻碍脉冲时域压缩的关键因素。对中国工程物理研究院的数拍瓦全光参量啁啾脉冲放大装置(SILEX-II)的光参量相位演化进行了详细研究。研究结果表明,通过光参量放大... 详细信息

在基于光参量啁啾脉冲放大的拍瓦级超短超强飞秒激光装置中,光参量相位是阻碍脉冲时域压缩的关键因素。对中国工程物理研究院的数拍瓦全光参量啁啾脉冲放大装置(SILEX-II)的光参量相位演化进行了详细研究。研究结果表明,通过光参量放大过程累积的群延迟色散高达53. fs2,三阶色散高达5782 fs3.在未补偿光参量相位的情况下,压缩脉冲的时域峰值强度仅为傅里叶变换极限脉冲的43.。通过调节压缩器光栅间距,补偿了光参量相位的群延迟色散,将压缩脉冲的时域峰值强度增加至傅里叶变换极限脉冲的94%。研究结果为SILEX-II激光装置的脉冲时域压缩提供了有效指导,同时也为未来基于全光参量啁啾脉冲放大技术的10~100 PW高峰值功率激光器的设计提供了依据。

关键词：激光器光参量啁啾脉冲放大光参量相位时域压缩傅里叶变换极限脉冲

Two-dimensional materials for future information technology: status and prospects

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Science china(Information sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng LI Taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong DUAN Yuhan FENG Yu FU Jingshu guo Pengwen guo Yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue huang Ziyang huang Ali IMRAN Ziqiang KONG Jia LI Qian LI Weisheng LI Lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU Yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-Ling REN Haowen SHU Litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... School of Electronic Science and Engineering Nanjing University School of Integrated Circuits Interdisciplinary Research Center for Future Intelligent Chips (Chip-X)Nanjing University School of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications State Key Laboratory of Infrared physics Shanghai Institute of Technical Physics Chinese Academy of Sciences School of physics and Key Lab of Quantum Materials and Devices of the Ministry of Education School of Electronic Science & EngineeringSoutheast University College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Suzhou Laboratory State Key Laboratory of Integrated Chips and Systems School of MicroelectronicsFudan University Shaoxin Laboratory Department of Applied physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China School

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3. integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronicdevices optoelectronic devices multi-functional integration

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 {3. Tu-Chen {3. 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 0.3. 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