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Nanocrystalline WSe_(2)excels at high-performance anode for Na storage via a facile one-pot hydrothermal method

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Tungsten 2024年第1期6卷 248-258页

作者： Hai-Yan Zou Lei Fang Gang Yu Dong wang State Key Laboratory of Chem/Bio-Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Changxing County Quality and Technology Supervision and Testing center Huzhou 313100China

For the next large-scale energy storage systems,sodium-ion batteries(SIBs)with excellent electrochemical performance are ***,the exploration of anode materials with high specific capacity,fascinating cycling stability and rate capability is still *** transition metal dichalcogenides(TMDs),tungsten diselenide(WSe_(2))has been regarded as an effective anode material for SIBs and has been extensively studied,due to high theoretical capacity and unique twodimensional layered ***,nanocrystalline WSe_(2)is prepared by a facile one-pot hydrothermal *** with the micro-scale WSe_(2),benefiting from the high specific surface area of highly ordered nano-flake structures and short ion/electron transport paths,nanocrystalline WSe_(2)shows excellent electrochemical performance in Na *** 1000 cycles at a current density of 2 A·g^(-1),a high specific capacity of 264.4 mA·h·g^(-1)is still *** full cell matched with the Na_(3)V_(2)(PO_(4))_(3) cathode can deliver an excellent reversible specific capacity of 196.5 mA·h·g^(-1)after 100 cycles at 0.5 A·g^(-1).

关键词： Tungsten diselenide Transition metal dichalcogenides Hydrothermal Sodium-ion batteries Layered structure

ANALYSIS ON LAND-USE CHANGE AND SOCIO-ecoNOMIC DRIVING FACTORS IN H AINAN ISLAND DURING 50YEARS FROM 1950TO 1999

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chinese Geographical Science 2002年第3期 2-7页

作者： XU Xin-liang 1 ,ZENG Lan 2 ,ZhuANG Da-fang 1 (1.Institute of Geographical sciences and Natural Resources Research,t he chinese Academy of sciences,beijing 100101,P.R.china 2.Information Consultative center,Institute of Macro-economy,Natio nal Planning Institute of Geographical sciences and Natural Resources Research， the chinese Academy of sciences， beijing 100101， P.R. china Information Consultative center， Institute of Macro-economy， National Planning Committee， beijing 100824， P. R. china

Land-use change is an important part of global change research(IGBP,1990-1992).But the majority of researches focus on the natural dr iving force of land use *** thi s paper,the authors studied the rela tionship be-tween socio-economic driving facto rs and land-use change with time series in Hainan *** on the stud y for the evolution of administrative system and policies in Hainan Island and the comprehensive analysis on the socia l economy da-ta and changes of social policies,th e socio-economic policies,human activities and land use of Hainan can be divided into three periods with different ch aracters:period from1950to 1978ch aracterized by the planning economi c system,peri-od from 1978to 1988characterized by the transfer of economic system and a doption of open policy,new stage fro m 1988to 1998with high growing *** th e other hand the authors describe the character of the periods and land-use change process affected by socio-economic *** paper provides an important method for evaluating the development and changes of Hainan social economy dur ing the 50years from 1950to 1999and f orecasting the development of Hainan so-cial economy in future.

关键词： socio-economic development land-use change planning economy refo rmand open-up economic sys-tem

The application of hyperspectral remote sensing to coast environment investigation

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Acta Oceanologica Sinica 2009年第2期28卷 1-13页

作者： ZHANG Liang ZHANG Bin CHEN Zhengchao ZHENG Lanfen TONG Qingxi State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications Chinese Academy of Science Beijing 100101 China Naval Institute of Hydrographic Surveying and Charting Tianjin 300061 China center for Earth Observation and Digital Earth Chinese Academy of Science Beijing 100190 China

Requirements for monitoring the coastal zone environment are first summarized. Then the appli- cation of hyperspectral remote sensing to coast environment investigation is introduced, such as the classification of coast beaches and bottom matter, target recognition, mine detection, oil spill identification and ocean color remote sensing. Finally, what is needed to follow on in application of hyperspectral remote sensing to coast environment is recommended.

关键词： hyperspectral remote sensing coastal zone ocean color remote sensing

基于深度学习和信号分解的北方寒区河流开河日期预报

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水利学报 2024年第5期55卷 577-585页

作者：丁红王伟泽杨泽凡刘欢胡鹏中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100038 西安理工大学土木建筑工程学院陕西西安710048

中国北方寒区河流春季开河时易产生冰凌现象,威胁涉河水工建筑物的安全。准确地预测寒区河流开河日期可为防凌指挥、调度决策提供重要参考依据。本文基于中国北方典型寒区-黑龙江省的5个代表水文站近60年的历史开河日期序列,采用完全自... 详细信息

中国北方寒区河流春季开河时易产生冰凌现象,威胁涉河水工建筑物的安全。准确地预测寒区河流开河日期可为防凌指挥、调度决策提供重要参考依据。本文基于中国北方典型寒区-黑龙江省的5个代表水文站近60年的历史开河日期序列,采用完全自适应集合经验模态分解(CEEMDAN)技术和深度学习长短期记忆模型(LSTM)方法构建河流开河日期预报的耦合模型,以期提高河流开河日期预报的精度。结果表明:本研究构建的开河日期预报耦合模型(CEEMDAN-LSTM)预测精度明显优于单一深度学习方法(LSTM)计算结果;与LSTM相比,CEEMDAN-LSTM可将开河日期预报的平均绝对误差从2.51 d降低至1.20 d,合格率从91.59%提高至100%。验证期平均绝对误差从3.85 d降低至1.65 d,合格率从88%提高至96%。因此,所构建的开河日期预报耦合模型具有较高的预报精度,可为我国北方寒区春季防凌指挥和调度提供技术支持。

关键词：河流开河日期信号分解技术深度学习预报方法北方寒区

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ON THE CONVERGENCE OF NONCONFORMING FINITEELEMENT METHODS FOR THE 2ND ORDER ELLIPTICPROBLEM WITH THE LOWEST REGULARITY

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Journal of Computational Mathematics 1999年第6期17卷 609-614页

作者： Lie-heng wang(LSEC, Institute of Computational Mathematics, Academia Sinica P.O.Box 2719, beijing100080, china) Acad Sinica Inst Computat Math LSEC Beijing 100080 Peoples R China

The convergences ununiformly and uniformly are established for the nonconforming finite element methods for the second order elliptic problem with the lowest regularity, i.e., in the case that the solution u is an ele... 详细信息

关键词： nonconforming finite element methods lowest regularity

Phylogenetic studies of chinese labeonine fishes(Teleostei: Cyprinidae)based on the mitochondrial16S rRNA gene

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Progress in Natural Science:Materials International 2005年第3期 21-27页

作者： LI Junbing 1,2 ,wang Xuzhen 1 ,HE Shunping 1ˇˇ and CHEN Yiyu 1 (1.Institute of Hydrobiology,chinese Academy of sciences,Wuhan430072,china 2.Graduate School of the chinese Academy of sciences,beijing100039,china) Institute of Hydrobiology，chinese Academy of sciences，Wuhan 430072，china Graduate School of the chinese Academy of sciences，beijing 100039，china Institute of Hydrobiology，chinese Academy of sciences，Wuhan 430072，china

The mitochondrial16S ribosomal RNA gene is sequenced from24ingroups taxa,including18species from Labeoninae grouped *** analyses are subjected to neighbor joining,maximum parsimony,maximum likelihood and Bayesian *** analysis indicates that Labeoninae is basically a monophyletic assemblage and can be divided into2major clades:one comprising the genera Cirrhinus,Crossocheilus and Garra;and the other consisting of the genera Labeo,Sinilabeo,Osteochilus,Pseu-doorossocheilus,Parasinilabeo,Ptychidio,Semilabeo,Pseudogyricheilus,Rectori and *** to our present analysis,the features such as the presence of the adhesive disc on the chin and the pharyngeal teeth in2rows used in the traditional taxonomy of Labeoninae provide scarce information for phylogeny of labeonine fishes.

关键词： 16S rRNA Labeoninae monophyly phylogeny Cyprinidae.

Selenopeptide nanomedicine ameliorates atherosclerosis by reducing monocyte adhesions and inflammations

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Nano Research 2024年第7期17卷 6332-6341页

作者： Zhen Luo Yuxing Jiang Zimo Liu Lamei Guo Li Zhang Hongtao Rong Zhongyu Duan Hongwen Liang Aili Zhang Lei wang Yu Yi Hao wang CAS center for Excellence in Nanoscience CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and Technology(NCNST)No.11 BeiyitiaoZhongguancunBeijing 100190China School of Chemical Engineering and Technology Hebei University of TechnologyTianjin 300130China Tianjin Medical University General Hospital Tianjin 300052China University of chinese Academy of sciences Beijing 100049China School of environmental Science and Safety Engineering Tianjin University of TechnologyTianjin 300384China College of Pharmacy Chongqing Medical UniversityChongqing 400016China School of Biomedical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Atherosclerosis is an inflammatory disease that may cause severe heart disease and *** pharmacotherapy for atherosclerosis shows limited *** the progression of atherosclerosis,monocyte adhesions and inflammatory macrophages play vital ***,precise regulations of inflammatory immune microenvironments in pathological tissues remain ***,we report an atherosclerotic plaque-targeted selenopeptide nanomedicine for inhibiting atherosclerosis progression by reducing monocyte adhesions and inflammation of *** targeted nanomedicine has 2.2-fold enhancement in atherosclerotic lesion *** oxidation-responsibility of selenopeptide enables eliminations of reactive oxygen species and specific release of anti-inflammatory drugs,thereby reducing inflammation responses of ***,we find the oxidative metabolite of selenopeptide,octadecyl selenite,can bind to P-selectin in a high affinity with a dissociation constant of 1.5μ*** in situ generated active seleno-species further inhibit monocyte adhesions for anti-inflammation in *** local regulations of monocyte adhesions and inflammations,the selenopeptide nanomedicine achieves 2.6-fold improvement in atherosclerotic plaque inhibition compared with simvastatin in the atherosclerosis mouse ***,the selenopeptide nanomedicine also displays excellent biological safety in both mice and rhesus *** study provides a safe and effective platform for regulating inflammatory immune microenvironments for inflammatory diseases such as atherosclerosis.

关键词： selenopeptide self-assembly atherosclerosis monocyte adhesion anti-inflammation

A citrullinated antigenic vaccine in treatment of autoimmune arthritis

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Science Bulletin 2024年第18期69卷 2920-2929页

作者： Xu Jin Tianya Dong Qian wang Yang Xie Xiangyu Fang Chaonan Wei Shuyan Liu Xi Zheng Ping wang Danxue Zhu Lulu Cao Suwei Dong Kechi Fang Chao Zhong Jing wang Fanlei hu Zhanguo Li Department of Rheumatology and Immunology Peking University People’s Hospital&Beijing Key Laboratory for Rheumatism Mechanism and Immune DiagnosisBeijing 100044China Peking-Tsinghua center for Life sciences Peking UniversityBeijing 100871China CAS Key Laboratory of Mental Health Institute of PsychologyChinese Academy of SciencesBeijing 100101China Department of Psychology University of Chinese Academy of SciencesBeijing 100049China Department of Chemical Biology School of Pharmaceutical SciencesPeking UniversityBeijing 100191China Institute of Systems Biomedicine Department of ImmunologyNHC Key Laboratory of Medical Immunology(Peking University)Beijing Key Laboratory of Tumor Systems BiologyPeking University Health Science CenterBeijing 100191China State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical SciencesPeking UniversityBeijing 100191China Department of Integration of chinese and Western Medicine School of Basic Medical SciencesPeking UniversityBeijing 100191China

Rheumatoid arthritis(RA)is an inflammatory autoimmune disease triggered by antigenic peptides with environmental and genetic risk *** has been shown that antigen-specific targeting could be a promising therapeutical strategy for RA by restoring immune tolerance to self-antigens without compromising normal *** of antigens enhances antigenic properties and induces autoimmune ***,we showed that citrullinated antigenic(citAg)vaccine ameliorated collageninduced arthritis with decreased T-helper 1(Th1)and Th17 cells,downregulated proinflammatory cytokines including interlukin-6 and tumor necrosis factor-a,and inhibited antigen recall responses.B cell receptor sequencing further revealed that citAg vaccine could dampen the dysregulated V(D)J recombination,restoring the immune *** together,the results demonstrated that citAg vaccine might have a therapeutic effect on RA.

关键词： CitAg Citrullination Collagen typeⅡ Therapeutic vaccine Immune tolerance Rheumatoid arthritis

Multi-scale detector optimized for small target

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Optoelectronics Letters 2024年第4期20卷 243-248页

作者： Zhu Yongchang YANG Sen TONG Jigang wang Zenghui School of Electrical Engineering and Automation Tianjin University of TechnologyTianjin 300384China center of Artificial Intelligence and Data Science University of South AfricaFlorida 1709South Africa Department of Electrical Engineering University of South AfricaFlorida 1709South Africa

The effectiveness of deep learning networks in detecting small objects is limited,thereby posing challenges in addressing practical object detection *** this research,we propose a small object detection model that operates at multiple *** model incorporates a multi-level bidirectional pyramid structure,which integrates deep and shallow networks to simultaneously preserve intricate local details and augment global ***,a dedicated multi-scale detection head is integrated into the model,specifically designed to capture crucial information pertaining to small *** comprehensive experimentation,we have achieved promising results,wherein our proposed model exhibits a mean average precision(mAP)that surpasses that of the well-established you only look once version 7(YOLOv7)model by 1.1%.These findings validate the improved performance of our model in both conventional and small object detection scenarios.

关键词： networks details thereby