检索结果-南通市图书馆

Numerical Simulation Study on the Effect of Horizontal Well Reservoir Stimulation for Gas Hydrate production

Acta Geologica Sinica(English Edition) 2022年第2期96卷 701-712页

作者： LI Xiaoyang TIAN Yingying ZHANG Xin SONG Gang ZHAO Ming LIANG Jinqiang HUANG Wei MENG Fanle Institute of Exploration Techniques China Geological SurveyLangfangHebei 065000China Directional Drilling Technology innovation Center China Geological SurveyLangfangHebei 065000China Guangzhou Marine Geological Survey China Geological SurveyGuangzhou 511466China Research Institute of Petroleum Exploration and Development Beijing 100083China

A new gas hydrate reservoir stimulation method of in-situ fracturing with transient heating is proposed, in line with analysis of the technological bottlenecks faced by marine gas hydrate production. This method injects the developed chemical reagents into a hydrate reservoir through hydraulic fracturing, releasing heat during the chemical reaction to increase the hydrate decomposition rate. The chemical reaction product furthermore has a honeycomb structure to support fractures and increase reservoir permeability. Based on the geological model of natural gas hydrate in the South China Sea, three development methods are simulated to evaluate hydrate production capacity, consisting of horizontal well, fractured horizontal well and in-situ fracturing with transient heating well. Compared with the horizontal well, the simulation results show that the cumulative gas production of the fractured horizontal well in one year is 7 times that of the horizontal well, while the cumulative gas production of in-situ fracturing with transient heating well is 12 times that of the horizontal well, which significantly improves daily efficiency and cumulative gas production. In addition, the variation patterns of hydrate saturation and temperature-pressure fields with production time for the three exploitation plans are presented, it being found that three sensitive parameters of fracture conductivity, fracture half-length and fracture number are positively correlated with hydrate production enhancement. Through the simulations, basic data and theoretical support for the optimization of gas hydrate reservoir stimulation scheme has been provided.

关键词： natural gas hydrate horizontal well reservoir stimulation transient heating seepage channel hydraulic fracturing production enhancement technology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research and Application of Prediction model for Ecological Balanced Optimal Fertilization Amount for Three Crops

引用

Meteorological and Environmental Research 2020年第5期11卷 96-103页

作者： Zhiping HUANG Shutian LIU Xianda HOU Shuojin WANG Hongyan ZHENG Jian DING Changhong MI Ling LU Yanlin HOU Agro-Environmental Protection Institute Ministry of Agriculture and Rural AffairsTianjin 300191China Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology Nanning Normal UniversityNanning 530001China Guangxi key laboratory of Earth Surface Processes and Intelligent Simulation Nanning Normal UniversityNanning 530001China key laboratory of Environment Change and Resources Use in Beibu Gulf(Nanning Normal University) Nanning 530001China

This paper analyzed the modeling principle,process and application process of the new ecological balanced fertilization model by data mining method based on the relationships among soil abundance-deficiency index,optimum fertilization amount and nutrient conversion rate of N,P,K for rice,wheat and maize in column *** results and conclusions were as follows:①on the basis of two ecological balanced fertilization models(available and total nutrients),a prediction model system of optimum fertilization amount based on nutrient conversion rate was established,including 3 *** first model predicted the optimum fertilization amount based on nutrient conversion rate,and the second model determined prediction difference value of optimum fertilization amount in the first amendment based on optimum yield,and the third model determined prediction difference value of optimum fertilization amount in the second amendment based on nutrient conversion rate.②Nutrient conversion rate and optimum yield were the common parameters of two models based on contents of available and total nutrients,and they were the core parameters of ecological balanced fertilization *** the specific application,the nutrient conversion rate and optimum yield were determined mainly based on the comprehensive comparison between the regional or similar plot or one plot and the experimental plot.③The two error amendments were due to the use of the fixed nutrient removal of 100 kg seeds,and underestimated the nutrient conversion rate when higher optimum production and overestimated the nutrient conversion rate when lower optimum production.④It was proposed that the nutrient conversion rate was regarded as a comprehensive nutrient index(abundance-deficiency)of ecological balanced *** was not only a parameter to measure fertilizer efficiency,but also a parameter to measure the abundance-deficiency of nutrients,and a parameter to guide fertilization.

关键词： Optimum yield Optimum fertilization amount Nutrient conversion rate Fertilizer utilization ratio Relative abundance-deficiency value of soil nutrient

来源：

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

Study on the Relationship between Utilization Ratios and Conversion Rates of Nitrogen,Phosphorus and Potassium for Rice

引用

Meteorological and Environmental Research 2020年第5期11卷 25-32页

作者： Shuojin WANG Zhiping HUANG Changhong MI Hongyan ZHENG Jian DING Shutian LIU Xianda HOU Ling LU Yanlin HOU Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology Nanning Normal UniversityNanning 530001China Guangxi key laboratory of Earth Surface Processes and Intelligent Simulation Nanning Normal UniversityNanning 530001China key laboratory of Environment Change and Resources Use in Beibu Gulf(Nanning Normal University) Nanning 530001China Agro-Environmental Protection Institute Ministry of Agriculture and Rural AffairsTianjin 300191China

This paper studied the relationships between utilization ratios and conversion rates of nitrogen,phosphorus and potassium for rice by data mining method based on data of"3414 fertilizer field trials"of rice by published papers from national soil testing and recommendation since *** results and conclusions were as follows:①the conceptual model of fertilizer utilization ratio of rice for plot was that,Y N≈a+b×optimum yield+c×optimum fertilizer amount of K,Y P≈a+b×optimum yield,Y K≈a respectively.②Fertilizer utilization ratio and nutrient conversion rate had 4 kinds of relationships:①no significant relationships:25,of which 14 were soil nutrients and 9 were environmental factors,the results showed that soil nutrients and environmental factors had little effect on nutrient yield ratio and fertilizer utilization ratio;②consistent significant relationships:2,one was that yield ratio and utilization ratio of N were positively correlated with the optimum production,explaining the importance of N for production,the other was that yield ratio and utilization ratio of P had a significantly positive correlation with conversion rate and utilization ratio of N,illustrating that nitrogen and phosphorus had mutual promotion;③contrary significant relationships:5,these showed as negative correlations of fertilizer utilization ratio and positive correlation of nutrient conversion ratio;④complementary significant relationships:22,the cause of the complementary phenomenon was that the fertilizer utilization ratio was the index of fertilizer efficiency in one season,while the nutrient conversion rate was the index of fertilizer efficiency in more seasons,which showed that the fertilizer utilization rate was significantly correlated,or the nutrient conversion rate was significantly correlated.

关键词： Optimum yield Optimum fertilization amount Nutrient conversion rate Fertilizer utilization ratio Relative abundance-deficiency value of soil nutrient

来源：

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

Enhancing the green efficiency of fundamental sectors in China’s industrial system:A spatial-temporal analysis

引用

Journal of Management Science and Engineering 2021年第4期6卷 393-412页

作者： Jiangxue Zhang Xu Liu Xue Zhang Yuan Chang Changbo Wang Lixiao Zhang School of Economics and Resource Management Beijing Key Lab of SCI-TECH Strategy for Urban Green DevelopmentBeijing Normal UniversityBeijing100875China School of Business Harbin University of CommerceHarbin150028China School of Management Science and Engineering Central University of Finance and EconomicsBeijing100081China College of Economics and Management&Research Center for Soft Energy Science Nanjing University of Aeronautics and AstronauticsNanjing210016China State key Joint laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing100875China

Due to sectoral interactions in the economy,the overall green efficiency(GE)of China’s industrial system relies heavily on fundamental sectors that contribute substantial energy to the supply chain production of other sectors but shows low sectoral *** the three fundamental sectors in China’s industrial systems,namely the smelting and pressing of nonferrous metals(SPNFM),the processing of petroleum,coking,and nuclear fuel(PPCNF);and the manufacturing of nonmetallic mineral products(MNMMP),we employed a three-stage data envelopment analysis(DEA)model to measure GE in the fundamental sectors in 30 provinces from 2010 to *** then adopted a stochastic frontier analysis(SFA)model to evaluate the influence of technological innovation(TI),industrial agglomeration(IA),environmental regulation(ER),and intraindustry competition(IC).The results showed that GE in the three fundamental sectors varied ***,TI promoted GE in MNMMP,but the effect was not obvious in the SPNFM and PPCNF ***,ER had positive impacts on GE in the fundamental *** effects of IA and IC on GE in the fundamental sectors varied in direction and *** eliminating the impacts of environmental effects and statistical noise,the real GE in the three fundamental sectors varied significantly compared to the comprehensive *** opportunities for enhancing GE in the fundamental sectors mainly lie in region-specific policy and regulations that avoid a“one-size-fits-all”governance approach.

关键词： Fundamental sectors Green efficiency Three-stage DEA Spatial differences

来源：

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

Kinetics of hydroxylation of phenol with SiC foam supported TS-1 structured catalyst

引用

Frontiers of Chemical Science and Engineering 2024年第11期18卷 257-267页

作者： Yanzhao Sun Zhitao Lv Siyu Zhang Guodong Wen Yilai Jiao Shenyang National laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

In light of the challenges associated with catalyst separation and recovery,as well as the low production efficiency resulting from intermittent operation for titanium silicalite-1(TS-1)catalyzed phenol hydroxylation to dihydroxybenzene in the slurry bed,researchers keep on exploring the use of a continuous fixed bed to replace the slurry bed process in recent *** study focuses on preparing a TS-1 coated structured catalyst on SiC foam,which exhibits significant process intensification in *** investigated the kinetics of this structured catalyst and compared it with those of extruded TS-1 catalyst;the dynamic equations of the two catalysts were *** was observed that both catalysts followed E-R adsorption mechanism model,with an effective internal diffusion factor ratio between structured and extruded TS-1 of approximately *** was confirmed that the foamed SiC-based structured TS-1 catalyst exhibited significant improvements in phenol hydroxylation in fixed-bed reactor due to its well-developed pore structure,good thermal conductivity,excellent internal mass transfer performance,and short reactant diffusion distance,leading to higher utilization efficiency of active *** finding also provides a foundation for designing and developing phenol hydroxylation processes in fixed-bed using structured catalysts through computational fluid dynamics calculations.

关键词： titanium silicalite-1 phenol hydroxylation SiC foam structured catalyst coating

来源：

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

Slag design and optimization for iron capturing platinum group metals from alumina-based spent catalysts

引用

Rare Metals 2023年第6期42卷 2093-2103页

作者： Xue-Feng He Xi-Ping Yin Yun-Ji Ding Zhi-Sheng Shi Bao-Huai Zhao Huan-Dong Zheng Jin-Xin Jian Shen-Gen Zhang Chein-Chi Chang Research Center for Metal Materials Recycling Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China Shunde innovation Institute of University of Science and Technology Beijing Foshan528399China Institute of Engineering Technology Sinopec Catalyst Co.Ltd.Beijing101111China Department of Engineering and Technical Services District of Columbia Water and Sewer AuthorityWashington DC20032USA

production of petrochemical catalysts accounts for one of the largest shares of platinum group metals(PGMs) consumption;thus,recycling of spent petrochemical catalysts holds great economic ***,PGMs are recovered through hydrometallurgical processes which have a low recovery efficiency and produce a large amount of *** this regard,this paper proposed a method to use iron-capturing PGMs based on CaO-Al_(2)O_(3)-Na_(2)O *** method avoided the formation of Fe-Si alloy and achieved efficient enrichment of *** droplet force model showed that the recovery efficiency of PGMs could be improved if the slag had low density and low *** on this result,FactSage software optimized the composition of ***,the effect of B_(2)O_(3) on the 1400 ℃ liquidus of CaO-Al_(2)O_(3)-Na_(2)O_(3)-B_(2)O_(3) phase diagram was ***,it was found that the recovery efficiency of PGMs exceeded 99% under the following optimized conditions:basicity of 1.0,20 wt%Na_(2)O,15 wt% B_(2)O_(3),15 wt% Fe,3 wt% C and a temperature range of 1400-1500℃.The thermodynamic model revealed the mechanism of iron *** chemical bonds prevented the formation of bonds between the alloy and slag,resulting in the separation of the slag from the *** particles and iron microspheres had significant surface Gibbs free *** when iron microspheres and PGMs particles collided and fused with each other to reduce their surface area could the Gibbs free energy of the system be reduced.

关键词： Slag type design Spent catalyst Alumina Platinum group metals(PGMs) Iron capture

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An inorganic liquid crystalline dispersion with 2D ferroelectric moieties

引用

National Science Review 2024年第5期11卷 254-263页

作者： Ziyang Huang Zehao Zhang Rongjie Zhang Baofu Ding Liu Yang keyou Wu Youan Xu Gaokuo Zhong Chuanlai Ren Jiarong Liu Yugan Hao Menghao Wu Teng Ma Bilu Liu Shenzhen Graphene Centre Shenzhen Key Laboratory of Advanced Layered Materials for Value-added ApplicationsTsinghua-Berkeley Shenzhen Institute and Institute of Materials ResearchTsinghua Shenzhen International Graduate School Tsinghua University Institute of Technology for Carbon Neutrality Faculty of Materials Science and Engineering Shenzhen Institute of Advanced Technology Chinese Academy of Sciences School of Physics and Institute for Quantum Science and Engineering School of Chemistry and Institute of Theoretical ChemistryHuazhong University of Science and Technology Xi'an Research Institute of High Technology Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Department of Applied Physics Hong Kong Polytechnic University

Electro-optical effect-based liquid crystal devices have been extensively used in optical modulation techniques, in which the Kerr coefficient reflects the sensitivity of the liquid crystals and determines the strength of the device's operational electric field. The Peterlin–Stuart theory and the O'Konski model jointly indicate that a giant Kerr coefficient could be obtained in a material with both a large geometrical anisotropy and an intrinsic polarization, but such a material is not yet reported. Here we reveal a ferroelectric effect in a monolayer two-dimensional mineral vermiculite. A large geometrical anisotropy factor and a large inherent electric dipole together raise the record value of Kerr coefficient by an order of magnitude, till 3.0 × 10-4mV-2. This finding enables an ultra-low operational electric field of10～2–10～4V m-1and the fabrication of electro-optical devices with an inch-level electrode separation, which has not previously been practical. Because of its high ultraviolet stability（decay production, and energy efficiency, prototypical displayable billboards have been fabricated for outdoor interactive scenes. This work provides new insights for both liquid crystal optics and two-dimensional ferroelectrics.

关键词： 2D materials layered minerals vermiculite ferroelectric inorganic liquid crystal Kerr coefficient

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Toxicity Screening of Several Fungicides on Tomato Basal Stem Rot

引用

Agricultural Science & Technology 2017年第1期18卷 168-171页

作者： Bo ZHANG Yueli ZHANG Liguo MA Kai QI Changsong LI Junshan QI Plant Protection Institute Shandong Academy of Agricultural Sciences/Shandong Key Laboratory of Plant Virology Jinan 250100 China

The toxicities of several fungicides to Pythium ultimum were determined by the method of mycelia growth. The results showed that hymexazol, Ovraclostrobin＋ Metiram, copper calcium sulphate, Thiophamate-merhyl and Famoxadone＋Cymoxanil all showed good inhibitory effects, of which Hymexazol was the best one with the ECho of 2.631 2 mg/L, followed by Ovractostrobin＋Metiram, whose ECso was 5.303 3 mg/L, and the effects of other fungicides were relatively poor. In the field fungicide screening test, the combination of 70% hymexazol wettable powder and 70% Thiophamate-merhyl had the control efficiency of 95.57%, which was better than the other test combinations, and it was applicable in the field control of tomato basal stem rot.

关键词： Tomato Pythium ultimum Basal stem rot Fungicide Toxicity screening

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

modeling the biomass of energy crops：Descriptions, strengths and prospective

引用

Journal of Integrative Agriculture 2017年第6期16卷 1197-1210页

作者： JIANG Rui WANG Tong-tong SHAO Jin GUO Sheng ZHU Wei YU Ya-jun CHEN Shao-lin HATANO Ryusuke key laboratory of Plant Nutrition and the Agri-environment in Northwest China Ministry of Agriculture/College of Natural Resources and Environment Northwest A&F University Yangling 712100 P.R.China Biomass Energy Center for Arid and Semi-arid Lands Northwest A&F University Yangling 712100 P.R. China College of Water Resources and Architectural Engineering Northwest A&F University Yangling 712100 P.R. China College of Geography Sciences Shanxi Normal University Linfen 041000 P.R. China Graduate School of Agriculture Hokkaido University Sapporo 060-8589 Japan

The assessment of the biomass of energy crops has garnered widespread interest since renewable bioenergy may become a substantial proportion of the future energy supply, and modeling has been widely used for the simulation of energy crops yields. A literature survey revealed that 23 models have been developed or adapted for simulating the biomass of energy crops, including Miscanthus, switchgrass, maize, poplar, willow, sugarcane, and Eucalyptus camaldulensis. Three categories（radiation model, water-controlled crop model, and integrated model with biochemical and photosynthesis and respiration approaches） were addressed for the selected models according to different principles or approaches used to simulate biomass production processes. EPIC, ALMANAC, APSIM, ISAM, MISCANMOD, MISCANFOR, SILVA, DAYCENT, APEX and SWAT are radiation models based on a radiation use efficiency approach（RUE） with few empirical and statistical parameters. The Aqua Crop model is a typical water-crop model that emphasizes crop water use, the expression of canopy cover, and the separation of evapotranspiration to soil evaporation and plant transpiration to drive crop growth. CANEGRO, 3PG, Crop Syst and DSSAT are integrated models that use photosynthesis and respiration approaches. SECRETS, LPJm L, Agro-BGC, Agro-IBIS, and WIMOVAC/Bio Cro, DNDC, DRAINMOD-GRASS, and Ag TEM are integrated models that use biochemical approaches. Integrated models are mainly mechanistic models or combined with functional models, which are dynamic with spatial and temporal patterns but with complex parameters and large amounts of input data. Energy crop models combined with process-based models, such as EPIC in SWAT and CANEGRO in DSSAT, provide good examples that consider the biophysical, socioeconomic, and environmental responses and address the sustainability and socioeconomic goals for energy crops. The use of models for energy crop productivity is increasing rapidly and encouraging; however, relevant databases,

关键词： biomass energy crops models database principles

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Numerical study on induction heating enhanced methanol steam reforming for hydrogen production

DeCarbon

引用

DeCarbon 2024年第4期6卷 52-63页

作者： Feng Wang Delun Guan Chuncen Wu Xiuqin Zhang Guoqiang Wang key laboratory of Low-grade Energy Utilization Technologies and Systems(Chongqing University) Ministry of EducationChongqing 400044PR China School of Energy and Power Engineering Chongqing UniversityChongqing 400044PR China

Electromagnetic induction heating technology,characterized by its non-contact thermal heat transfer,diminished thermal inertia,and facile temperature management,is applied in this study to enhance catalytic methanol steam reforming(MSR)reaction process.A two-dimensional reactor model was developed integrating electromagnetic field coupling with MSR reactions,fluid dynamics and heat *** the reactor,heat is induced instantaneously on the magnetic material through an electromagnetic induction process,which generated by renewable *** showed that the Internal-Double Row Cylinder(IN-DRC,cylinder means that the shape of induction heating element is cylindrical.)highest heating efficiency is 38.3%,which is limited by the kinetics of MSR ***,thermal efficiency reaches its maximum with the reaction channel outlet temperature reaching about 580 ***-Double Row Cylinder(IN-DRC)and Internal-Double Row Ball(IN-DRB,ball means that the shape of induction heating element is spherical)methanol conversions are virtually identical,with a maximum value close to 100%.Furthermore,the findings that the adoption of internal induced heating,in contrast to external heating,across the four reactor designs can effectively mitigate temperature gradient within the *** reduction in thermal disparity significantly amplifies methanol conversion within the reactor,thereby markedly enhancing its overall performance in hydrogen ***,non-contact internal induction heating method has the potential for substantially hydrogen production processes.

关键词： Methanol steam reforming Hydrogen production Induction heating Tubular bed reactor Cold spot

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：