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Exploring the topographical pattern beneath the water surface: Global bathymetric volume-area-height curves(BVAH) of inland surface water bodies

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Geodesy and Geodynamics 2024年第6期15卷 602-615页

作者： Siyu Zhu Wei Wan Guoqing Zhang zhaoyuan yao Yue Xu Baojian Liu Zhizhou Guo Zengliang Luo Wentao Xiong Rui Ji Qingwen Ji Yu He Feng Lv Weizhen Fang Xiao Tan Qian Huang Lei Xiao Huan Li Institute of Remote Sensing and Geographic Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China School of Civil Engineering and Environmental Science University of OklahomaNormanOklahomaUSA State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China School of Soil and Water Conservation Bejing Forestry UniversityBeijing 100871China Hubei Key Laboratory of Regional Ecology and Environmental Change School of Geography and Information EngineeringChina University of GeosciencesWuhan 430074China HUN-REN Balaton Limnological Research Institute TihanyHungary

Global inland surface water bodies such as lakes and reservoirs,important components of the hydrosphere and ecosphere,are increasingly affected by climate *** bathymetric volume-areaheight (BVAH) curves for global inland surface water bodies can enhance our understanding of their topography and climate ***,accurately quantifying the topographic patterns of these water bodies remains challenging due to the difficulties in collecting comprehensive bathymetric ***,we collected and processed over 2000 bathymetric maps of global water bodies from over 50 different data sources and then developed the BVAH ***,the BVAH hydrological curves of 16671 global inland surface water bodies (larger than 10 km~2) were *** results include but are not limited to (1) For most targeted water bodies,area (A) and volume (V) exhibit significant power function relationships with surface heights (H),with optimal power values quantified as 1.42 for A and 2.42 for V.(2) The BVAH model outperforms GLOBathy in estimating area and volume changes,achieving higher correlation coefficients (CC) of approximately 0.962 for the area and 0.991 for volume,and demonstrating lower percentages of root mean squared errors (PRMSE) around 10.9% for the area and 4.8% for volume.(3) In the case study of the Xizang Plateau and various large global reservoirs,the BVAH curve database can capture dynamic volume *** a unified simulation of the bathymetric topographical patterns,our bathymetric dataset and corresponding BVAH curve database have great potential to contribute to effective water resource management and ecological conservation efforts worldwide.

关键词： Global inland water bodies Hydrological curves Bathymetric map Climate change

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单频光纤激光器相位噪声的影响因素

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红外与激光工程 2017年第3期46卷 90-93页

作者：宋昭远姚桂彬张磊磊张雷龙文辽宁石油化工大学理学院辽宁抚顺113001

单频光纤激光器是光纤通信中最具前途的一种光源,在光纤传感、激光雷达和激光测距等方面具有重要的应用,而相位噪声是衡量其性能的关键指标之一。采用示波器和动态信号分析仪方法对单频光纤激光器的相位噪声进行测量。利用功率谱、积分... 详细信息

单频光纤激光器是光纤通信中最具前途的一种光源,在光纤传感、激光雷达和激光测距等方面具有重要的应用,而相位噪声是衡量其性能的关键指标之一。采用示波器和动态信号分析仪方法对单频光纤激光器的相位噪声进行测量。利用功率谱、积分谱对不同泵浦源功率、种子源功率和波长的光纤激光器的相位噪声进行定性分析,结果表明:泵浦功率越大,低频相位噪声所占比重越大;而对于不同种子源功率,相位噪声在测试频段的比例基本处于同一水平;对于测试的不同种子的波长,相位噪声高频段所占比例不同,其中种子波长为1 560.48 nm比例最大。

关键词：相位噪声单频光纤激光器泵浦功率积分谱

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Development Strategies in Transition Metal Borides for Electrochemical Water Splitting

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Energy & Environmental Materials 2022年第2期5卷 470-485页

作者： Yihang yao zhaoyuan Zhang Lifang Jiao Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage Center(ReCast)College of ChemistryNankai UniversityTianjin 300071China

Electrochemical water splitting is a feasible method for producing environmental benignity energy of hydrogen,while high price and low availability on the earth of noble electrocatalysts constrain their global-scale *** metal borides(TMBs)have displayed unique metalloid characteristic and outstanding performance for oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)in the last few ***,recent developments of the TMBs for HER and OER are ***,the impact factors and relevant evaluation of electrocatalytic performance are described,that is,overpotential,Tafel slope and exchange current density,stability,faradaic efficiency,turnover frequency,mass and specific ***,the optimization strategies of borides are emphasized,which principally include coupling with effective substrates,elemental doping,phase modification,interfacial engineering,and morphology ***,in order to reach the goal of application,the remaining challenges and perspectives are given to point out a direction for enhancing the performance of borides.

关键词： borides electrocatalysts hydrogen evolution reaction oxygen evolution reaction

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基于深度学习的遥感样本库一致性评估

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北京大学学报（自然科学版） 2023年第4期59卷 563-568页

作者：姚照原马磊万玮宋本钦王卫红邓继伟肖蕾冀锐魏之皓崔要奎北京大学地球与空间科学学院北京100871 中国电子科技集团公司电子科学研究院北京100041 中国铁路设计集团有限公司天津300251

现有基于深度学习的遥感研究集中在算法开发方面,缺乏对遥感样本库的研究。针对此问题,提出一种基于深度学习的样本库一致性评估方法,对卫星遥感、三维建模和网络爬虫等不同来源的舰船样本库中各类样本之间的相似性进行评估。结果表明:1... 详细信息

现有基于深度学习的遥感研究集中在算法开发方面,缺乏对遥感样本库的研究。针对此问题,提出一种基于深度学习的样本库一致性评估方法,对卫星遥感、三维建模和网络爬虫等不同来源的舰船样本库中各类样本之间的相似性进行评估。结果表明:1)在样本库一致性最高时,该方法得到的一致性为1;2)当样本库一致性呈梯度变化时,一致性评价结果随样本库一致性的变化而变化;3)数据来源相似的样本库能够进行合并,制作方式差异较大的样本库不能合并。因此,所提方法能够准确地评估样本库的一致性,可为深度学习训练时样本库的选择提供参考。

关键词：深度学习遥感影像样本库一致性评价

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Energy Storage Operation Modes in Typical Electricity Market and Their Implications for China

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Energy Engineering 2024年第9期121卷 2409-2434页

作者： Junhui Liu Yihan Zhang Zijian Meng Meng Yang yao Lu Zhe Chai zhaoyuan Wu State Grid Henan Economic Research Institute Zhengzhou450052China School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing102206China

As the Chinese government proposes ambitious plans to promote low-carbon transition,energy storage will play a pivotal role in China’s future power ***,due to the lack of a mature electricity market environment and corresponding mechanisms,current energy storage in China faces problems such as unclear operational models,insufficient cost recovery mechanisms,and a single investment entity,making it difficult to support the rapid development of the energy storage *** contrast,European and American countries have already embarked on certain practices in energy storage operation *** exploration of key issues such as investment entities,market participation forms,and cost recovery channels in both front and back markets,a wealth of mature experiences has been ***,this paper first summarizes the existing practices of energy storage operation models in North America,Europe,and Australia’s electricity markets separately from front and back markets,finding that perfect market mechanisms and reasonable subsidy policies are among the main drivers for promoting the rapid development of energy storage ***,combined with the actual development of China’s electricity market,it explores three key issues affecting the construction of costsharing mechanisms for energy storage under market conditions:Market participation forms,investment and operation modes,and cost recovery ***,in line with the development expectations of China’s future electricitymarket,suggestions are proposed fromfour aspects:Market environment construction,electricity price formation mechanism,cost sharing path,and policy subsidy mechanism,to promote the healthy and rapid development of China’s energy storage industry.

关键词： Electricity market energy storage operational mode cost-sharing mechanism

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Influence of Al-doping on electroluminescence of silicon-based films

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Chinese Science Bulletin 2001年第24期46卷 2043-2045页

作者： WU Xuemei YE Chunnuan ZHUGE Lanjian DONG Yemin TANG Naiyun YU Yuehui NING zhaoyuan yao Weiguo Department of Physics Suzhou UniversitySuzhou 215006China Ion Beam Laboratory Shanghai Institute of MetallurgyChinese Academy of SciencesShanghai 200050China

A series of Al-doped silicon-rich silica (AlSiO) composite films have been prepared by a dual ion beam co-sputtering method with a Al, Si and SiO2 composite target. The content of Al and Si in the films can be adjusted by changing the surface area of Al and Si of the target. Visible electroluminescence (EL) from the samples is found to have only one luminescence band peaked at 510 nm (2.4 eV). Experimental results show that the doping of Al is beneficial to reducing the onset voltage and to increasing the intensity of EL.

关键词： Al-doped silicon-based films EL.

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Effect of lanthanum oxide on microstructure and mechanical properties of ZK60 magnesium alloy

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Journal of Rare Earths 2024年第12期42卷 2270-2278页

作者： Wei Qiu zhaoyuan Lu Senmao Zhang Shuanglong Li Jian Chen Wei Chen Wei Li Yanjie Ren Jun Luo Maohai yao Wen Xie School of Energy and Power Engineering Changsha University of Science & Technology Key Laboratory of Energy Efficiency and Clean Utilization The Education Department of Hunan Province Changsha University of Science & Technology School of Mechanical & Energy Engineering Zhejiang University of Science & Technology Hunan Provincial Key Laboratory of Vehicle Power and Transmission System Hunan Institute of Engineering Hunan Rare Earth Metal Material Research Institute Institute of Rare Earth Light Alloys

Different amounts of La2O3were added to ZK60 alloy to observe the changes in microstructure and mechanical properties of ZK60-XLa2O3（X = 0, 0.2 wt%, 0.5 wt%） composites. Our findings reveal that within the as-cast ZK60 alloy, the Mg-Zn binary phase is manifested as rod-shaped precipitates,exhibiting a dispersed distribution predominantly along the grain boundary regions. With the increase of La2O3addition, the rod-like Mg-Zn binary phases are gradually replaced by Mg-Zn-La ternary phases,and these Mg-Zn-La ternary phases are semi-continuously distributed around the grain boundaries. Both ZK602 and ZK605 alloys result in a corresponding improvement in ductility after extrusion. It is noteworthy that the ductility of the as-extruded ZK605 alloy is increased by 59.4% compared to ZK60 at the expense of a reduction of only 3.9% in yield strength. Taken together, the significant increase in ductility of ZK605 is mainly due to the weakening of the basal texture, which is weakened by the redox reaction of La2O3with the a-Mg matrix, generating the La element. The decrease in yield strength of ZK605 in the extruded state is closely related to the observed grain coarsening phenomenon and the basal texture weakening. At the same time, the ultimate tensile strength of ZK605 shows a slight increase, which is mainly due to the second phase strengthening. The Mg-Zn-La ternary phase exhibits a notably hard character, and it is evident that the distribution of this phase becomes progressively denser as the La2O3content increases.

关键词： Basal texture La2O3 Mechanical properties Microstructure Rare earths ZK60

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Exploring the topographical pattern beneath the water surface: Global bathymetric volume-area-height curves (BVAH) of inland surface water bodies

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Geodesy and Geodynamics 2024年第6期 602页

作者： Siyu Zhu Wei Wan Guoqing Zhang zhaoyuan yao Yue Xu Baojian Liu Zhizhou Guo Zengliang Luo Wentao Xiong Rui Ji Qingwen Ji Yu He Feng Lv Weizhen Fang Xiao Tan Qian Huang Lei Xiao Huan Li

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Oxidative stress-triggered Wnt signaling perturbation characterizes the tipping point of lung adeno-to-squamous transdifferentiation

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Signal Transduction and Targeted Therapy 2023年第2期8卷 730-743页

作者： zhaoyuan Fang Xiangkun Han Yueqing Chen Xinyuan Tong Yun Xue Shun yao Shijie Tang Yunjian Pan Yihua Sun Xue Wang Yujuan Jin Haiquan Chen Liang Hu Lijian Hui Lin Li Luonan Chen Hongbin Ji State Key Laboratory of Cell Biology Shanghai Institute of Biochemistry and Cell BiologyCAS Center for Excellence in Molecular Cell ScienceChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beijing 100049China Zhejiang University-University of Edinburgh Institute Zhejiang University School of MedicineHaining 314400China Department of Thoracic Surgery Fudan University Shanghai Cancer CenterShanghaiChina Department of Oncology Shanghai Medical CollegeFudan UniversityShanghaiChina School of Life Science and Technology ShanghaiTech UniversityShanghai 200120China State Key Laboratory of Molecular Biology Shanghai Institute of Biochemistry and Cell BiologyCAS Center for Excellence in Molecular Cell ScienceChinese Academy of SciencesShanghai 200031China Key Laboratory of Systems Health Science of Zhejiang Province School of Life ScienceHangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesChinese Academy of SciencesHangzhou 310024China

Lkb1 deficiency confers the Kras-mutant lung cancer with strong plasticity and the potential for adeno-to-squamous transdifferentiation(AST).However,it remains largely unknown how Lkb1 deficiency dynamically regulates *** the classical AST mouse model(Kras LSL-G12D/+;Lkb1flox/flox,KL),we here comprehensively analyze the temporal transcriptomic dynamics of lung tumors at different stages by dynamic network biomarker(DNB)and identify the tipping point at which the Wnt signaling is abruptly suppressed by the excessive accumulation of reactive oxygen species(ROS)through its downstream effector *** genetic perturbation of the Wnt pathway using two different Ctnnb1 conditional knockout mouse strains confirms its essential role in the negative regulation of ***,pharmacological activation of the Wnt pathway before but not after the tipping point inhibits squamous transdifferentiation,highlighting the irreversibility of AST after crossing the tipping *** comparative transcriptomic analyses of mouse and human tumors,we find that the lineage-specific transcription factors(TFs)of adenocarcinoma and squamous cell carcinoma form a“Yin-Yang”counteracting ***,inactivation of the Wnt pathway preferentially suppresses the adenomatous lineage TF network and thus disrupts the“Yin-Yang”homeostasis to lean towards the squamous lineage,whereas ectopic expression of NKX2-1,an adenomatous lineage TF,significantly dampens such phenotypic transition accelerated by the Wnt pathway *** negative correlation between the Wnt pathway and AST is further observed in a large cohort of human lung adenosquamous ***,our study identifies the tipping point of AST and highlights an essential role of the ROS-Wnt axis in dynamically orchestrating the homeostasis between adeno-and squamous-specific TF networks at the AST tipping point.

关键词： squamous homeostasis lung

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Socket及DDE在自动化立体车库监控系统中的应用

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计算机工程 2006年第7期32卷 256-257,263页

作者：姚小明白晨明范多旺蒋兆远兰州交通大学光电技术与智能控制教育部重点实验室兰州730070 北京师范大学珠海校区信息学院珠海519085 兰州交通大学机电技术研究所兰州730070

介绍了自动化立体车库监控系统的结构及其工作原理,重点讨论了在立体车库监控系统中,基于网络数据传榆和DynamicDataExchange(DDE)协议的多个程序配合使用如何实现应用程序之间的信息交换,克服VisualBasic6.0应用程序处理多线程的不足,... 详细信息

介绍了自动化立体车库监控系统的结构及其工作原理,重点讨论了在立体车库监控系统中,基于网络数据传榆和DynamicDataExchange(DDE)协议的多个程序配合使用如何实现应用程序之间的信息交换,克服VisualBasic6.0应用程序处理多线程的不足,从而达到对立体车库快速控制与管理。

关键词： DDE Windows socket Visual Basic6,0 自动化立体车库监控系统信息交换快速控制

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