检索结果-南通市图书馆

Acta Oceanologica Sinica 2011年第4期30卷 60-74页

作者： SONG Xingyu HUANG Liangmin {1. Jianlin YIN Kedong LIU Sheng TAN Yehui YIN Jianqiang Key Laboratory of Marine Bio-resources Sustainable Utilization South China Sea Institute of Oceanography Chinese Academy of Sciences Guangzhou 510301 China State Key Laboratory of Oceanography in the Tropics Guangzhou 510301 China Australian Rivers institute Griffith University Brisbane 4111 Australia

Chemometric approach based on principal component analysis（PCA） was utilized to examine the spatial variances of environmental and ecological characteristics in the Zhujiang River（Pearl River） Estuary and adjacent waters（ZREAW） in the South china Sea. The PCA result shows that the ZREAW can be divided into different zones according to the principal components and geographical locations of the study stations,and indicates that there are distinct regional variances on environmental features and the corresponding phytoplankton biomass and community structures among different areas. The spatial distribution of ecological features was implied to be influenced by various degrees of the different water resources,such as the Pearl River discharges,the coastal current and the oceanic water from the South china Sea. The variation of the biomass maximum zone and the complex impacts on the spatial distributions of phytoplankton biomass and production were also evaluated.

关键词： principal component analysis spatial variations environmental conditions ecological distribution phytoplankton Zhujiang River (Pearl River) Estuary

Design method of extractant for liquid-liquid extraction based on elements and chemical bonds

在线全文

学校读者我要写书评

暂无评论

chinese Journal of Chemical Engineering 2024年第4期68卷 193-202页

作者： yuwen Wei Chunling {1. yue {1. Lili wang Li xia xiaoyan Sun Shuguang xiang institute of Process System Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Yantai Guobang Chemical Machinery Technology Co. Ltd.Yantai 264002China

In the petrochemical industry process, the relative volatility between the components to be separated is close to one or the azeotrope that systems are difficult to separate. Liquid-liquid extraction is a common and effective separation method, and selecting an extraction agent is the key to extraction technology research. In this paper, a design method of extractants based on elements and chemical bonds was proposed. A knowledge-based molecular design method was adopted to pre-select elements and chemical bond groups. The molecules were automatically synthesized according to specific combination rules to avoid the problem of “combination explosion” of molecules. The target properties of the extractant were set, and the extractant meeting the requirements was selected by predicting the correlation physical properties of the generated molecules. Based on the separation performance of the extractant in liquid-liquid extraction and the relative importance of each index, the fuzzy comprehensive evaluation membership function was established, the analytic hierarchy process determined the mass ratio of each index, and the consistency test results were passed. The results of case study based on quantum chemical analysis demonstrated that effective determination of extractants for the analysis of benzene-cyclohexane systems. The results unanimously prove that the method has important theoretical significance and application value.

关键词： Molecular design Element and chemical bonds Molecular simulation Thermodynamics Solvent extraction

Research on the dynamics of the South china Sea opening:Evidence from analogue modeling

在线全文

学校读者我要写书评

暂无评论

science{1. Earth sciences 2006年第10期49卷 1053-1069页

作者： SUN Zhen1,2. zhou Di1, ZHONG Zhihong3, xia Bin2. QIU Xuelin1, ZENG Zuoxun4 & JIANG Jianqun5 1. CAS Key Laboratory of Marginal Sea Geology, South{2. Sea institute of Oceanology, chinese academy of sciences, guangzhou 510301,{2. 2. CAS Key Laboratory of Marginal Sea Geology, guangzhou institute of Geochemistry, chinese academy of sciences, guangzhou 51064.,{2. 3. Department of Technology, Shenzhen Branch of CNOOC, guangzhou 5102.0,{2. 4. Faculty of Earth sciences,{2. University of Geosciences, Wuhan 430074,{2. 5. Hainan Oil & Gas Exploration Company, Liaohe Oilfield Petrochina, Panjin 12.010,{2. 1. CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China 2. CAS Key Laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China 3. Department of Technology Shenzhen Branch of CNOOC Guangzhou 510240 China 4. Faculty of Earth sciences China University of Geosciences Wuhan 430074 China 5. Hainan Oil & Gas Exploration Company Liaohe Oilfield PetroChina Panjin 124010 China

Independent of Indochina extrusion, the South{1. Sea experienced a process from passive continental rifting to marginal sea drifting. According to the fault patterns in the Beibu Gulf basin and the Pearl River Mouth basin, the continental rifting and early spreading stage from 32.to 2. Ma were controlled by extensional stress field, which shifted clockwise from southeastward to south southeastward. From 2. Ma on, the sea spread in NW-SE direction and ceased spreading at around 1..5 Ma. Integrated geological information with the assumption that the South{1. Sea developed along a pre-Cenozoic weakness zone, we did analogue experiments on the South{1. Sea evolu- tion. Experiments revealed that the pre-existing weakness zone goes roughly along the uplift zone between the present Zhu-1.and Zhu-2.depression. The pre-existing weakness zone is composed of three segments trending NNE, roughly EW and NEE, respectively. The early opening of the South{1. Sea is accompanied with roughly 1.° clockwise rotation, while the SE sub-sea basin opened with SE extension. Tinjar fault was the western boundary of the Nansha block (Dangerous Ground), while Lupar fault was the eastern boundary of the Indochina, NW-trending rift belt known as Zengmu basin developed between above two faults due to block divergent of Indochina from Nansha. In the experiment, transtensional flower structures along NW-trending faults are seen, and slight inversion occurs along some NE-dipping faults. The existence of rigid massifs changed the orientations of some faults and rift belt, and also led to deformation concentrate around the massifs. The rifting and drifting of the South{1. Sea might be caused by slab pull from the proto South{1. Sea subducting toward Borneo and/or mantle flow caused by India-Asia collision.

关键词： South china Sea, rifting and drifting, clockwise rotation, analogue modeling, rigid massifs.

Multifunctional catalytic sites regulation of atomic-scale iridium on orthorhombic-CoSe_(2.for high efficiency dual-functional alkaline hydrogen evolution and organic degradation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第5期92卷 271-281页

作者： Jingjing Huang Chenglin Zhong Yanjie xia Jia Liu Guizhen Li Chao Yang Jiahong {1. Qian {1. Zhenbao zhang Feng Yan Jianghua Wu yu Deng Zhenjiang zhou Xingchen He Paul K.Chu Woon-Ming Lau Xue-Feng yu College of Chemistry and Chemical Engineering Linyi UniversityLinyi 276005ShandongChina Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093JiangsuChina College of Biosystems Engineering and Food science Zhejiang UniversityHangzhou 310058ZhejiangChina Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina

The earth-abundant and high-performance catalysts are crucial for commercial implementation of hydrogen evolution reaction(HER).Herein,a multifunctional site strategy to construct excellent HER catalysts by incorporating iridium(Ir)ions on the atomic scale into orthorhombic-CoSe2.Ir-CoSe_(2.)was *** hydrogen evolution activity in alkaline media such as a low overpotential of 48.7 mV at a current density of 1. mA cm^(-2.and better performance than commercial Pt/C catalysts at high current densities were found in the Ir-CoSe_(2. *** the experiments and theoretical calculations,it was revealed that Ir enabled CoSe_(2.to form multifunctional sites to synergistically catalyze alkaline HER by promoting the adsorption and dissociation of H_(2.O(Ir sites)and optimizing the binding energy for H^(*)on Co *** was noticeable that the electrolytic system comprising the Ir-CoSe_(2.electrode not only produced hydrogen efficiently via HER,but also degraded organic pollutants(Methylene blue).The cell voltage of the dual-function electrolytic system was 1.58 V at the benchmark current density of 50 mA cm^(-2.,which was significantly lower than the conventional water splitting *** was indicated that this method was a novel strategy for designing advanced HER electrocatalysts by constructing multifunctional catalytic sites for hydrogen production and organic degradation.

关键词： Orthorhombic-CoSe_(2. Multifunctional sites design Hydrogen evolution reaction Synergistically catalyze Methylene blue oxidation

Knowledge and data jointly driven aeroengine gas path performance assessment method

在线全文

学校读者我要写书评

暂无评论

chinese Journal of Aeronautics 2024年第5期37卷 533-557页

作者： Zhe wang Xu{1.n FU Rui {2. Zhengfeng BAI xiangzhao xia Wei JIANG Department of Mechanical Engineering Harbin Institute of TechnologyWeihai 264209China Weihai Key Laboratory of Intelligent Operation and Maintenance Harbin Institute of TechnologyWeihai 264209China Control System Design Laboratory AECC ShenYang Engine Research InstituteShenyang 110015China

Aeroengines,as the sole power source for aircraft,play a vital role in ensuring flight *** gas path,which represents the fundamental pathway for airflow within an aeroengine,directly impacts the aeroengine's performance,fuel efficiency,and ***,timely and accurate evaluation of gas path performance is of paramount *** paper proposes a knowledge and data jointly driven aeroengine gas path performance assessment method,combining Fingerprint and gas path parameter deviation ***,Fingerprint is used to correct gas path parameter deviation values,eliminating parameter shifts caused by non-component performance ***,coarse errors are removed using the Romanovsky criterion for short-term data divided by an equal-length overlapping sliding ***,an Ensemble Empirical Mode Decomposition and Non-Local Means(EEMD-NLM)filtering method is designed to“clean”data noise,completing the preprocessing for gas path parameter deviation ***,based on the characteristics of gas path parameter deviation values,a Dynamic Temporary Blended Network(DTBN)model is built to extract its temporal features,cascaded with Multi-Layer Perceptron(MLP),and combined with Fingerprint to construct a Dynamic Temporary Blended AutoEncoder(DTB-AutoEncoder).Eventually,by training this improved autoencoder,the aeroengine gas path multi-component performance assessment model is formed,which can sufficiently decouple the nonlinear mapping relationship between aeroengine gas path multi-component performance degradation and gas path parameter deviation values,thereby achieving the performance assessment of engine gas path *** practical application cases,the effectiveness of this model in assessing the aeroengine gas path multi-component performance is verified.

关键词： Performance assessment Aeroengine Fingerprint Gas path parameter deviation values Jointly drive

Characteristic Study of Self-Powered Sensors Based on Native Protein Composite Film

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第1期7卷 222-228页

作者： Jiehui Xue Huijing xiang Yanrong {1. Jun Yang xia Cao Zhonglin wang Beijing institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Resources Environment and MaterialsSchool of PhysicsScience and TechnologyCenter on Nanoenergy ResearchGuangxi UniversityNanning 530004China Center for Green Innovation School of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing 100083China Research Centre of Information Technology Shenzhen Institute of Information TechnologyShenzhen 518172China School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China School of Materials science and Engineering Georgia Institute of TechnologyAtlanta GA 30332-0245USA

Flexible electronic sensors composed of flexible film and conductive materials play an increasingly important role in wearable and internet information *** has received more and more attention and made some progress over the ***,it is still a great challenge to prepare biocompatible and highly transparent conductive *** white is a pure natural protein-rich *** cellulose has a good compatibility and high transparency,which is an ideal material for flexible ***,we overcome the problem of poor mechanical flexibility and electrical conductivity of protein,and develop a high transparency and good flexibility hydroxypropylmethyl cellulose/egg white protein composite membrane-based triboelectric nanogenerator('X'-TENG).The experimental results show that the flexible pressure sensor based on'X'-TENG has a high sensitivity,fast response speed,and low detection *** can even be used as a touch/pressure sensing artificial electronic *** can also be made into an intelligent waffle keyboard for recording and tracking users of the *** strategy may provide a new way to easily build flexible electronic sensors and move toward practical applications.

关键词： flexible sensors intelligent sensing natural protein-rich material triboelectric nanogenerators

The influence of proxy selection on global annual mean temperature reconstructions during the Common Era

在线全文

学校读者我要写书评

暂无评论

science{1. Earth sciences 2024年第8期67卷 2522-2534页

作者： Bao YANG xia LI Minhui HE Feng {1. Yesi ZHAO Peng {2. Jianglin {1. Frontiers science Center for Critical Earth Material Cycling School of Geography and Ocean ScienceNanjing UniversityNanjing 210023China Key Laboratory of Desert and Desertification Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Centre Eau Terre Environnement Institut National de la Recherche ScientifiqueQuébecQCG1K 9A9Canada GEOTOP Research Centre in the Dynamics of the Earth System MontréalQC H2X 3Y7Canada

The reconstruction of global annual mean temperatures made by the PAGES 2. Consortium in 2.1. represents one of the most influential sequences of global climate variability over the Common ***,it is still not clear how the reconstruction can be influenced by the selection of reconstruction methods and the selection of proxy records with different temporal resolutions over different *** adopt a widely used Composite-Plus-Scale method to elucidate the effects of the selection of the proxy records on temperature *** ensure the uniformity of data,different types of proxy records spanning the past~2.00 years from the PAGES 2. proxy network were used to investigate the potential effects of proxy selection in hemispheric and global temperature reconstructions during the past two *** long-term trends,spectral characteristics,and volcanic responses of the annual temperatures were studied based on the *** results reveal a significant cooling trend in the global annual mean temperature using both tree-ring and non-tree-ring records during the 1.1.50CE period,and show that the cooling exhibits a stronger trend in the Southern Hemisphere(SH)than that in the Northern Hemisphere(NH).Yet,the long-term trends vary according to different combinations of proxy *** reconstructions based on different types of proxies also exhibit different features in terms of volcanic responses and spectral ***-ring-based temperature reconstructions show stronger cooling responses to tropical volcanic eruptions,while non-tree-ring-based reconstructions suggest less robust volcanic responses,which may be related to dating uncertainties and low temporal resolution of the ***-ring width records tend to preserve a substantial proportion of high-frequency(2.0 years)variability,whereas non-tree-ring proxies tend to capture a larger fraction of low-frequency(>2.0 years)*** are needed to reduce uncertainti

关键词： Millennial cooling trend Global climate change Proxy records Volcanic eruptions Spectral properties Common Era

Continuous-wave operation of 1.50 nm low-threshold triple-lattice photonic-crystal surface-emitting lasers

在线全文

学校读者我要写书评

暂无评论

Light(science & Applications) 2024年第3期13卷 446-453页

作者： Ziye wang {1. Liu Pinyao wang Huanyu Lu Bo Meng Wei zhang Lijie wang Yanjing wang Cunzhu Tong State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Center of Materials science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Central Research institute Planning Dept 2012 LabsHuawei Technologies Company Ltd.Shenzhen 518129China

Benefitting from narrow beam divergence,photonic crystal surface-emitting lasers are expected to play an essential role in the ever-growing fields of optical communication and light detection and *** operating with 1.55μm wavelengths have attracted particular attention due to their minimum fiber loss and high eye-safe ***,high interband absorption significantly decreases their performance at this 1.55μm ***,stronger optical feedback is needed to reduce their threshold and thus improve the output *** this goal,photonic-crystal resonators with deep holes and high dielectric contrast are often ***,the relevant techniques for high-contrast photonic crystals inevitably complicate fabrication and reduce the final *** this paper,we demonstrate the first continuous-wave operation of 1.55μm photonic-crystal surface-emitting lasers by using a‘triple-lattice photonic-crystal resonator’,which superimposes three lattice point groups to increase the strength of in-plane optical *** this geometry,the in-plane 1.0°coupling can be enhanced threefold compared to the normal single-lattice *** theoretical and experimental investigations demonstrate the much lower threshold current density of this structure compared to‘single-lattice’and‘double-lattice’photonic-crystal resonators,verifying our design *** findings provide a new strategy for photonic crystal laser miniaturization,which is crucial for realizing their use in future high-speed applications.

关键词： resonator crystal lattice

THE CHARACTERISTIC OF MARINE ENVIRONMENT IN LINGDINGYANG ESTUARY

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

chinese Geographical {1. 2001年第2期11卷 155-162页

作者： CHEN Bing-lu1. zhang {1.n-ni2. CHEN Xin-geng1. wang Zhi-gang1. YANG Guang-xing1.(1.institute of Environmental science, Zhongshan University, guangzhou 51.2.5, P. R.{12. 2. Department of Environmental science, Zhongshan University, guangzhou 51.2.5 institute of Environmental {1. Zhongshan University Guangzhou P. R. China Department of Environmental science Zhongshan University Guangzhou P. R. China

Hydrologic features, load of main pollutants and current condition of water quality in Lingdingyang Estuary are discussed by references and monitoring data. Affected by topography, runoff and tide, its dynamic condition is very complicated. Different water areas have different hydrologic features. The topography under the water of Lingdingyang Estuary is higher in the northwest than that in the southeast. The shoal alternates with the deep trough within the bay .The distribution of the salinity and the contents of the mud and the main pollutants tally with the topography tendency. Change in water quality goes through four stages. Current condition of water quality is fairly good. Inorganic nitrogen is the primary pollutant, and then phosphorus. Rich in nutrition of nitrogen and phosphorus become a more and more prominent problem.

关键词： Lingdingyang Estuary hydrologic features load of pollutant water quantity

Southeastern extension of the Red River fault zone (RRFZ) and its tectonic evolution significance in western South china Sea

在线全文

学校读者我要写书评

暂无评论

science{1. Earth sciences 2006年第8期49卷 839-850页

作者： LIU Baoming1.2.3, xia Bin1. LI Xuxuan1.3, {1. Minqiang1.3, NIU Binhua2. ZHONG Lifeng1. JIN Qinghuan1.4 & JI Shaocheng1.5 1. Key Laboratory of Marginal Sea Geology and Resources, chinese academy of sciences,guangzhou {12., china 2. china University of Geosciences (Beijing), Beijing 1.0083, china 3. Research Center of science & Technology Department, CNOOC, Beijing 1.002., china 4. guangzhou Marine Geological Survey, Ministry of Land & Resources, guangzhou 51.075, china 5. Ecole Polytechnique Montreal, H3C3A7, Canada 1. Key Laboratory of Marginal Sea Geology and Resources Chinese Academy of Sciences Guangzhou 510640 China 2. china University of Geo{1.s (Beijing) Beijing 100083 China 3. Research Center of science & Technology Department CNOOC Beijing 100027 China 4. guangzhou Marine Geological Survey Ministry of Land & Resources Guangzhou 510075 China 5. Ecole Polytechnique Montreal H3C3A7 Canada

Recent geophysical surveys and basin modeling suggest that the No.1.fault in the Ying- gehai basin (YGHB) is the seaward elongation of the Red River fault zone (RRFZ) in the South china Sea (SCS). The RRFZ, which separates the South china and Indochina block, extends first along the yuedong fault, offshore of Vietnam, and then continues southward and breaks off into two branches: the Lupar fault and the Tinjia fault. The southern extension of the Lupar fault dies out beneath the NW Borneo while the Tinjia fault extends southeast and reaches the Brunei-Sabah area. According to the gravity and geomagnetic data, and the tectonic evolution of the basins, there are different evolution histories between the Wan’an basin (WAB) and the basins in the Nansha block. The Tinjia fault may be the boundary between the Balingian block and the Nansha block. Hence, the line linking the yue- dong fault and the Tinjia fault, which both are continental margin faults and strike-slip ones in the geological evolution histories, constitute the boundary between the Indochina and Nansha block. The Lupar fault, in contrast, is an intraplate fault within the Indochina block. The results provide new hints for reconstructing the tectonic evolution history of the RRFZ and the opening of the SCS, and also a framework for hydrocarbon prospecting in the region.

关键词： Red River fault zone, tectonic evolution, fault, extension, western South china Sea.