检索结果-南通市图书馆

Synthesis and Characterization of Polyvinylpyrrolidone modified Bentonite and Its Application in Superabsorbent Polymer

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

Synthesis and Characterization of Polyvinylpyrrolidone modif...

Capacity Optimization Configuration of Hydrogen Production System for Offshore Surplus Wind Power

2014中国功能材料科技与产业高层论坛

作者： Peiqi Wu Chengzhang Zheng Junjian Liao Bing Lin Min Chen Jianjun Du Qiming Lu Institute of Biomaterials College of SciencesSouth China Agricultural University Electric Power Research Institute of guangdong Power Grid corporation College of Environmental science and engineering Zhongkai University of Agriculture and Engineering

The modified bentonite was prepared via solution intercalation using sodium bentonite and a series of polyvinylpyrrolidone（PVP）as raw material and intercalation agents,*** effects of the amount and molecular weight of PVPon bentonite modification were *** the structure of M-Bent was characterized by Fourier transform infrared（FTIR）,X-Ray Diffraction（XRD）,Thermogravimetric Analyzer（TG）and Brunauer-EmmettTeller surface area measurement（BET）.The waterswelling capability of superabsorbent composite based on M-Bent was determined as *** indicated that the basal spacing for M-Bent increased to 2.196nm and expansion volumn increased to 84 mL,when PVP content was 8%andaverage relative molecular weight was *** water and 0.9%NaCl solution absorbency of superabsorbent composite containing M-Bent can reach 681.2 g/g and 125.4 g/*** composites in practice were also studied by observing anddetecting the harm to the root when the summer maize seeds grew in the water absorbed *** root of summer maize were sturdier compared to the plants grown without the M-Bent in superabsorbent.

关键词： bentonite superabsorbent polymer water absorbency polyvinylpyrrolidone

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Energy engineering 2023年第12期120卷 2803-2818页

作者： Yanshan Lu Binbin He Jun Jiang Ruixiao Lin Xinzhen Zhang Zaimin Yang Zhi Rao Wenchuan Meng Siyang Sun Guangzhou Power Supply Bureau Guangdong Grid CorporationGuangzhou510620China Sichuan Energy Internet Research Institute Tsinghua UniversityChengdu610042China Energy Development Research Institute Co. Ltd.China Southern Power GridGuangzhou510530China

To solve the problem of residual wind power in offshore wind farms,a hydrogen production system with a reasonable capacity was configured to enhance the local load of wind farms and promote the local consumption of residual wind *** studying the mathematical model of wind power output and calculating surplus wind power,as well as considering the hydrogen production/storage characteristics of the electrolyzer and hydrogen storage tank,an innovative capacity optimization allocation model was *** objective of the model was to achieve the lowest total net present value over the entire life *** model took into account the cost-benefit breakdown of equipment end-of-life cost,replacement cost,residual value gain,wind abandonment penalty,hydrogen transportation,and environmental *** MATLAB-based platform invoked the CPLEX commercial solver to solve the *** with the analysis of the annual average wind speed data from an offshore wind farm in guangdong Province,the optimal capacity configuration results and the actual operation of the hydrogen production system were *** the calculation scenario,this hydrogen production system could consume 3,800 MWh of residual electricity from offshore wind power each *** could achieve complete consumption of residual electricity from wind power without incurring the penalty cost of wind ***,it could produce 66,500 kg of green hydrogen from wind power,resulting in hydrogen sales revenue of 3.63 million *** would also reduce pollutant emissions from coal-based hydrogen production by 1.5 tons and realize an environmental value of 4.83 million *** annual net operating income exceeded 6 million RMB and the whole life cycle NPV income exceeded 50 million *** results verified the feasibility and rationality of the established capacity optimization allocation *** model could help advance power system planning and operation research and assist offshore wind farm

关键词： Surplus wind power offshore wind power hydrogen generation capacity optimization configuration total net present cost

Generation and propagation of 21-day bottom pressure variability driven by wind stress curl in the East China Sea

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

Acta Oceanologica Sinica 2020年第7期39卷 91-106页

作者： Hua Zheng Xiao-Hua Zhu Hirohiko Nakamura Jae-Hun Park Chanhyung Jeon Ruixiang Zhao Ayako Nishina Chuanzheng Zhang Hanna Na Ze-Nan Zhu Hong-Sik Min State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China Southern Marine Science and engineering guangdong Laboratory(Zhuhai) Zhuhai 519082China Faculty of Fisheries Kagoshima UniversityKagoshima 8900056Japan Department of Ocean Sciences Inha UniversityIncheon 22212Korea Department of Mechanical engineering Massachusetts Institute of TechnologyCambridge 02139USA School of Earth and Environmental Sciences Seoul National UniversitySeoul 08826Korea Ocean Circulation and Climate Research Center Korea Institute of Ocean Science and TechnologyBusan 49111Korea

Between June 2015 and June 2017,two pressure-recording inverted echo sounders(PIESs)and five current and pressure-recording inverted echo sounders(CPIESs)deployed along a section across the Kerama Gap acquired a dataset of ocean bottom pressure records in which there was significant 21-day variability(Pbot21).The Pbot21,which was particularly strong from July-December 2016,was coherent with wind stress curl(WSC)on the continental shelf of the East China Sea(ECS)with a squared coherence of 0.65 for a 3-day time lag.A barotropic ocean model demonstrated the generation,propagation,and dissipation of *** modeled results show that the Pbot21 driven by coastal ocean WSC in the ECS propagated toward the Ryukyu Island Chain(RIC),while deep ocean WSC could not induce such *** the continental shelf,the Pbot21 was generated nearly synchronously with the WSC from the coastline to the southeast but dissipated within a few days due to the effect of bottom *** detection of Pbot21 by the moored array was dependent on the 21-day WSC patterns on the continental *** Pbot21 driven southeast of the Changjiang Estuary by the WSC was detected while the Pbot21generated northeast of the Changjiang Estuary was not.

关键词： pressure-recording inverted echo sounder East China Sea bottom pressure wind stress curl

Transmission Tower Stress Analysis and Online Monitoring Scheme

在线全文

学校读者我要写书评

暂无评论

Transmission Tower Stress Analysis and Online Monitoring Sch...

Study on Feasibility Evaluation of Wind Power Generation Based on Grey-AHP

作者： Tuan-jie GAN Xin YAN Xi YANG Yi-nan GENG Xin TANG Ya MOU Zhan-qing YU Jiangmen Power Supply Bureau of guangdong Power Grid Co China Southern Power Grid Corporation Key Lab of Power Systems Department of Electrical EngineeringTsinghua University

So far,the theoretical study of the transmission tower line is not enough for the research and analysis of the transmission line under the wire icing and strong wind *** understanding of the disaster load mechanism,structural analysis method and vibration control is still insufficient,resulting in the accidents of broken towers caused by ice coating,wind load and geological disasters still occur frequently,which is one of the main hazards of safe operation of power *** of this paper,the failure mechanism of transmission towers in various environments is studied in ***,the mechanical characteristics of towers under environmental load are analyzed by finite element simulation ***,an online monitoring method which is based on the mechanical characteristics of transmission tower,is proposed to detect the stress state and determine if there is a fault will occur or has *** these circumstances,the force of transmission towers will be known in real time,and power grid disaster can be prevented in advance.

关键词： Transmission tower Failure mechanism Mechanical properties Online monitoring

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Study on Feasibility Evaluation of Wind Power Generation Bas...

Dual-channel mechano-phosphorescence:a combined locking effect with twisted molecular structures and robust interactions

2012 International Conference on Smart Technologies for Materials and Communication(ICSTMC 2012)

作者： Tan Zuan Fang Fang Xu Baiting Li Xin Department of plans and operations Electric Power Research Institute of Guangdong Power Grid Corporation Economics and Management School North China Electric Power University Department of plans and operations Electric Power Research Institute of guangdong Power Grid corporation

The paper builds a Grey-AHP model, which combines gray relative analysis method and Analytic Hierarchy Process. Through analysis of the feasibility of wind power, it establishes the feasibility evaluation system of wind power generation. It evaluates the feasibility of wind power in a certain region by Grey-AHP model. Compared with the actual situation, it proves to that the results are credible and reliable, and also proves the applicability and practical value of the Grey-AHP model.

关键词： Grey-AHP model wind power generation sustainable development evaluation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第4期13卷 738-746页

作者： Zongliang Xie Zhu Mao Hailan Wang Yuxin Xiao Xiayu Zhang Tao Yu Zhongfu An Wei Huang Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics&Xi’an Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’an 710072China. Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518100China. Shenzhen Institutes of Advanced Electronic Materials Shenzhen 518100China. Key Laboratory of Flexible Electronics&Institute of Advanced Materials Nanjing Tech University30 South Puzhu RoadNanjing 211816China

Organic mechanoluminescence materials,featuring dual emission and ultralong phosphorescence characteristics,exhibit significant potential for applications in real-time stress sensing,pressure-sensitive lighting,advanced security marking techniques,and material breakage ***,due to immature molecular design strategies and unclear luminescence mechanisms,these materials remain rarely *** this study,we propose a valuable molecular design strategy to achieve dual-channel *** introducing the arylphosphine oxide group into a highly twisted molecular framework,enhanced intra-and intermolecular interactions could be achieved within rigid structures,leading to dual-channel mechanoluminescence with greatly promoted ultralong *** investigations reveal the substantial boosting effect of intra-and intermolecular interactions on mechanoluminescence and ultralong phosphorescence properties by locking the highly twisted molecular *** work provides a concise and guiding route to develop novel smart responsive luminescence materials for widespread applications in material science.

关键词： channel luminescence locking

Improvement on Condition Assessment Model for Oil-paper Insulation

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

高电压技术 2013年第8期39卷 1974-1980页

作者： LA Yuan SHI Xuetao CAO Wen HE Baosheng KE Chunjun WU Kai LONG Hongyu Electric Power Research Institute of guangdong Power Grid corporation Guangzhou 510080 China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710049 China Electronic Information College Xi'an Polytechnic University Xi'an 710048 China Postdoctoral Workstation of Chongqing Electric Power corporation Chongqing 401123 China

Identification of the aging condition and the failure probability of oil-paper insulation in transformer is important for improving the reliability of electric power transmission system and applying life cycle cost (LCC) management to electrical equipment. Based on data obtained in a series of multi-accelerated-aging experiments, two approaches for calculating failure probability of oil-paper insulation were compared in aspects of degree of polymerization (DP) and condition ranking. In the experiments, mineral oil and cellulose paper are sub- jected to electrical and thermal stresses, and several parameters, including dissolved gases’ volume fraction, furfural content, moisture content, and degree of polymerization, are measured after the aging process. Results show that weight of carbon oxide, which has a close relationship with cellulose paper degradation, is much higher in DP model than in condition ranking model. Moreover, it is concluded that DP model is more practically accurate than condition ranking model, because aging of cellulose paper rather than mineral oil is the key and critical factor of oil-paper insulation aging.

关键词：油纸绝缘评估模型绝缘状态老化实验寿命周期成本电力传输系统失效概率纤维素

engineering Structure and Strength Design of Reducer Bend under Internal Pressure

在线全文

学校读者我要写书评

暂无评论

International Journal of Plant engineering and Management 2016年第2期21卷 93-106页

作者： CHEN Sun-Yi CHEN Jin LIU Ceng-dian The Challenge Petrochemical Machinery corporation of Maoming Guangdong maoming 525024 P. R. China Key Lab of Pressure Systems and Safety East China University of Science and Technology Shanghai 200237 P. R. China

Standard reducer bends have structural functions of both bend and reducer pipe at the same time. However, there is a lack of strength design method in the current codes. In order to develop the strength design method of the reducer bends subjected to internal pressure, analytical formulas are re-examined. Finite element analysis and stress measurements of the reducer bend are carried out. It is found that it is not appropriate to analyze the reducer bends by using thin membrane theory. The formula derived directly from circumferential stress formula of reducer bends under internal pressure is conservative, which is further verified by the finite element analysis results and it can thus be applied to piping design.

关键词： strength design stress analysis reducer pipe reducer bends elbows

Chronology of the Tungsten Deposits in Southern Jiangxi Province, and Episodes and Zonation of the Regional W-Sn Mineralization-Evidence from High-precision Zircon U-Pb, Molybdenite Re-Os and Muscovite Ar-Ar Ages

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2012年第3期86卷 555-567页

作者： FENG Chengyou ZHANG Dequan ZENG Zailind WANG Song Key Labaratory of Metallogeny and Mineral Resource Assessment Ministry of Land and Resources Institute of Mineral Resources CAGS Beijing 100037 China South Jiangxi Geological Survey Party of JBEDGMR Ganzhou 341000 China China Coal Geology engineering corporation Beijing 100073 China

Previous studies have obtained some petrogenetic and metallogenic chronological data with SHRIMP （sensitive high-resolution ion microprobe） zircon U-Pb, zircon LA-ICPMS （laser-ablation-inductively coupled plasma mass spectroscopy） U-Pb, molybdenite Re-Os isochron and muscovite Ar-Ar methods in southern Jiangxi Province and its adjacent areas. Based on these, the purpose of this paper is to study the petrogenetic and metallogenic ages and their time gap for different genetic types of W-Sn deposits, and thus to research their numerous episodes, zonal arrangement and their geodynamic background. The result shows that the large-scale W-Sn mineralization in southern Jiangxi Province occurred in the middle to late Jurassic （170-150 Ma）, the skarn W-Sn-polymetallic deposits formed much earlier （170-161 Ma）, and all of the wolframite-quartz vein type, greisen type, altered granite type and fractured zone type tungsten deposits formed in the late Jurassic （160-150 Ma）. In one ore field or ore district, greisen type tungsten deposits formed earlier than quartz vein type ones hosted in the endoor exo-contact zone; and quartz vein type hosted in the endocontact zone formed earlier than that of exocontact zone. There is no significant time difference between tungstentin mineralization and its intimately associated parent granite emplacement （1-6 Ma）. They all formed in the same rock-forming and ore-forming system and under the same geodynamic setting. Regionally, rock-forming and ore-forming processes of the W-Sn deposits in the Nanling region （include southern Jiangxi Province, southern Hunan Province, northern guangdong Province and eastern Guangxi Zhuang Autonomous Region） exhibit numerous episodes. The mineralization in the Nanling region mainly occurred at （240-210） Ma, （170-150） Ma and （130-90） Ma. The tungsten-tin deposits in this region are centered by the largest scale in southern Jiangxi Province and southern Hunan Province, and become small in the east, west, south an

关键词： isotopic chronology mutiple episodes of mineralization geodynamics W-Sn deposit Southern Jiangxi Nanling