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The Operation Model of Pig Supply Chain Based on Temporal and Spatial Perspectives
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作者 高阔 甘筱青 《Agricultural Science & Technology》 CAS 2014年第9期1624-1628,共5页
This paper constructed pig supply chain based on theoretical study and practical research, then analyzed the operation model of pig supply chain from tem- poral and spatial perspectives. The results showed that from t... This paper constructed pig supply chain based on theoretical study and practical research, then analyzed the operation model of pig supply chain from tem- poral and spatial perspectives. The results showed that from the spatial perspective, pig supply chain had five models of operation, such as vertical integration pig sup- ply chain, quasi-vertical integration pig supply chain (tightly-knit pig supply chain), semi-tightly pig supply chain, loosely-organized pig supply chain and market-oriented pig supply chain. In contrast, from temporal aspect, pig supply chain experiences the pure market transaction, contract form, cooperatives, vertical integration and hori- zontal integration model of operation; the future pig supply chain model in China might be the longitudinal transverse group alliance pig supply chain, namely, the upper vertical integration or quasi-vertical integration (leading processing enterprise + farmer) and down horizontal integration (leading processing enterprises + logistics company + sales), and it would be a kind of competition among interest groups by division of cooperation. 展开更多
关键词 Pig supply chain operation model TIME SPACE
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Operational Model for Evaluating the Permeation of Mixed Gas Through Poly(dimethylsiloxane) Membrane 被引量:1
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作者 武法文 李磊 +2 位作者 徐志红 谭淑娟 张志炳 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2006年第5期700-707,共8页
An operational model is developed to evaluate and predict the permeation performance of mixed gas through poly(dimethylsiloxane) (PDMS) membranes by combining the ideal gas permeation model with the ex-perimental anal... An operational model is developed to evaluate and predict the permeation performance of mixed gas through poly(dimethylsiloxane) (PDMS) membranes by combining the ideal gas permeation model with the ex-perimental analysis of the mixed gas transport character. This model is tested using the binary and ternary mixed gas with various compositions through the PDMS membranes, and the predicted data of the permeation flux and the compositions of the permeated gas are in good agreement with the experimental ones, which indicates that the op-erational model is applicable for the evaluation of the permeation performance of mixed gas through PDMS mem-branes. 展开更多
关键词 operational model poly (dimethylsiloxane) membrane mixed gas permeation performance
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Comprehensive Evaluation Model of Reservoir Operation Based on Improved Set Pair Analysis 被引量:4
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作者 任炳昱 孙宜超 +2 位作者 周正印 程正飞 胡兴富 《Transactions of Tianjin University》 EI CAS 2013年第1期25-28,共4页
A comprehensive evaluation model based on improved set pair analysis is established. Considering the complexity in decision-making process, the model combines the certainties and uncertainties in the schemes, i.e., id... A comprehensive evaluation model based on improved set pair analysis is established. Considering the complexity in decision-making process, the model combines the certainties and uncertainties in the schemes, i.e., identical degree, different degree and opposite degree. The relations among different schemes are studied, and the traditional way of solving uncertainty problem is improved. By using the gray correlation to determine the difference degree, the problem of less evaluation indexes and inapparent linear relationship is solved. The difference between the evaluation parameters is smaller in both the fuzzy comprehensive evaluation model and fuzzy matter-element method, and the dipartite degree of the evaluation result is unobvious. However, the difference between each integrated connection degree is distinct in the improved set pair analysis. Results show that the proposed method is feasible and it obtains better effects than the fuzzy comprehensive evaluation method and fuzzy matter-element method. 展开更多
关键词 set pair analysis comprehensive evaluation model gray correlation reservoir operation
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The Construction and Competitiveness of Operation Model of Agricultural Industrial Cluster 被引量:1
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作者 YANG Fang 《Asian Agricultural Research》 2011年第7期80-84,共5页
Through reviewing the viewpoints of former scholars, the connotation and features of supply chain of agricultural industrial cluster are introduced. The agricultural industrial cluster model constituted by core networ... Through reviewing the viewpoints of former scholars, the connotation and features of supply chain of agricultural industrial cluster are introduced. The agricultural industrial cluster model constituted by core network and supporting network is constructed. Three operation models of this kind of supply chain is described: the model takes wholesale market of agricultural products as the core; the model take pillar industries of agricultural industrialization as core; model takes the chains of retail enterprises as core. The competitiveness of agricultural industrial cluster is researched. The research assumes that the competiveness of supply chain of agricultural industrial cluster is mainly represented to make the agricultural industrial cluster to acquire more capabilities in terms of innovation and knowledge sharing capability, resource allocation capability, agile market adaptability and distinct value creation capability. 展开更多
关键词 Supply chain of agricultural industrial cluster operation model COMPETITIVENESS China
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A Multi-case Study of Community Supported Agriculture (CSA) Operation Model in Beijing 被引量:1
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作者 CHEN Yingying 《Journal of Landscape Research》 2021年第4期89-93,99,共6页
As one of the ways to localize foods,community supported agriculture can strengthen food safety and should be reasonably guided and developed.Based on the analysis of the spatial layout of the community supported agri... As one of the ways to localize foods,community supported agriculture can strengthen food safety and should be reasonably guided and developed.Based on the analysis of the spatial layout of the community supported agriculture organizations in Beijing,this paper described the development framework and course of community supported agriculture in Beijing.Combining 3 differentiated cases with the consumer's participation in community supported agriculture and the trust mechanism,it was found that the drive type has a very significant impact on the characteristics of these organizations. 展开更多
关键词 Community Supported Agriculture operation model Consumer participation Trust mechanism Consumer-driven Producer-driven
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Operational Modal Analysis of a Ship Model in the Presence of Harmonic Excitation 被引量:1
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作者 Junchen Xu Ming Hong Xiaobing Liu 《Journal of Marine Science and Application》 2013年第1期38-44,共7页
A ship is operated under an extremely complex environment, and waves and winds are assumed to be the stochastic excitations. Moreover, the propeller, host and mechanical equipment can also induce the harmonic response... A ship is operated under an extremely complex environment, and waves and winds are assumed to be the stochastic excitations. Moreover, the propeller, host and mechanical equipment can also induce the harmonic responses. In order to reduce structural vibration, it is important to obtain the modal parameters information of a ship. However, the traditional modal parameter identification methods are not suitable since the excitation information is difficult to obtain. Natural excitation technique-eigensystem realization algorithm (NExT-ERA) is an operational modal identification method which abstracts modal parameters only from the response signals, and it is based on the assumption that the input to the structure is pure white noise. Hence, it is necessary to study the influence of harmonic excitations while applying the NExT-ERA method to a ship structure. The results of this research paper indicate the practical experiences under ambient excitation, ship model experiments were successfully done in the modal parameters identification only when the harmonic frequencies were not too close to the modal frequencies. 展开更多
关键词 natural excitation technique (NExT) eigensystem realization algorithm (ERA) ship structure harmonic excitation signal processing modal parameters identification ship model operational model analysis
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Business Models,Operation Models and Service Development of IPTV
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作者 Yu Yifang (Network Division of ZTE Corporation,Nanjing 210012,China) 《ZTE Communications》 2006年第3期32-34,共3页
IPTV,as a newborn service,is restricted on market operation by multiple factors. Therefore,exploration is required in respect of its business,operations and service provision models. First,an IPTV industry value chain... IPTV,as a newborn service,is restricted on market operation by multiple factors. Therefore,exploration is required in respect of its business,operations and service provision models. First,an IPTV industry value chain can be formed by integrating the advantages of the existing business models of telecommunication,broadcasting and TV,and Internet industries,which helps realize win-win cooperation of all the parties on the chain. Second,plans for technology implementation and network deployment should be made after comprehensive consideration according to various development stages of the IPTV. Third,a reasonable profit allocation model may promote the growth of IPTV services. Last,market competitiveness will be improved by services bundling. Generally,IPTV will become a breakthrough point for the strategic transformation of telecom operators and meet their innovation demands. Therefore,IPTV is expected to be a promising technology helping telecom operators find more growth space in the information communication market. 展开更多
关键词 Business models operation models and Service Development of IPTV 中兴 通讯技术
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Triptych Knowledge—Skills—Payroll and Business Performance: Application of an Operational Model for an Accounting Rating of the Human Capital in the Area of Distribution
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作者 Jimmy Feige Jean-Paul Méreaux 《Chinese Business Review》 2021年第4期119-130,共12页
The human capital’s accounting could allow companies to better manage the acquired knowledge and the skills developed by the employees when they join the firm.An operational model,suitable for a business enterprise’... The human capital’s accounting could allow companies to better manage the acquired knowledge and the skills developed by the employees when they join the firm.An operational model,suitable for a business enterprise’s HR manager and validated by its headboard,needs to include the employees’expertise and skills relative to their“cost”for the employer—the wage bill—and an assessment of the commercial performance.The human capital’s valuation includes methodological issues.Besides,the notion of human capital seems hardly understandable as a whole:The human capital gathers nevertheless components,such as knowledge—skills for which a first valuation can be proposed to test an accounting evaluation model for the operational human capital.In a perspective of a responsible management and a good HR policy,the method used must be able to better manage the knowledge and the competences employees acquired by accompanying them with the appropriate human resource management practices.This paper aims to show that the accounting valuation of human capital can become a tool in order to manage the knowledge and skills acquired and able to support a company’s human resources policy while being useful to its commercial performance—here in the distribution sector.In a research-intervention frame led in a responsible group,we use a model based on a triptych—wage bill,knowledge,and skills—to evaluate the human capital’s accounting,with an analytical highlight on the components measurement of the used“knowledge”and“skills”indexes in particular.A reflection on the operational model’s enrichment is proposed. 展开更多
关键词 human capital knowledge and skills indices accounting valuation operational model distribution sector
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STOCHASTIC MODEL OF PERIODIC OPERATION PERFORMANCE FOR THE CONTINUOUS COUNTER-CURRENT ADSORPTION PROCESS
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作者 Sun Shuyu Niu Wengtai Jiang Zhixin 《Chinese Journal of Reactive Polymers》 1995年第1期8-19,共12页
A stochastic model is developed to predict the peniodic operation performance ofthe continuous counter-current adsorption process. The model takes into account theeffects of random backmixing of particles, axial dispe... A stochastic model is developed to predict the peniodic operation performance ofthe continuous counter-current adsorption process. The model takes into account theeffects of random backmixing of particles, axial dispersion of liquid phase, liquid- film mass transfer, intraparticle diffusion and panticle shape, and can revealclearly the behavior of solid and liquid phase in adsorption process. The simulation results agree with the experimental data rather well. 展开更多
关键词 Periodic operation Adsorption process Stochastic model Simulation
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WEB-BASED VIRTUAL CNC MACHINE MODELING AND OPERATION
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作者 HE Hanwu WU Yueming GU Yaoda LU Yongming 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2007年第6期109-113,共5页
A CNC simulation system based on intemet for operation training of manufacturing facility and manufacturing process simulation is proposed. Firstly, the system framework and a rapid modeling method of CNC machine tool... A CNC simulation system based on intemet for operation training of manufacturing facility and manufacturing process simulation is proposed. Firstly, the system framework and a rapid modeling method of CNC machine tool are studied under the virtual environment based on PolyTrans and CAD software. Then, a new method is proposed to enhance and expand the interactive ability of virtual reality modeling language(VRML) by attaining communication among VRML, JavaApplet, JavaScript and Html so as to realize the virtual operation for CNC machine tool. Moreover, the algorithm of material removed simulation based on VRML Z-map is presented. The advantages of this algorithm include less memory requirement and much higher computation. Lastly, the CNC milling machine is taken as an illustrative example for the prototype development in order to validate the feasibility of the proposed approach. 展开更多
关键词 Virtual reality CNC machine tools Machining simulation Virtual reality modeling language (VRML) Virtual operation
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Uncertain optimal model and solving method to platform scheduling problem in battlefield 被引量:2
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作者 Yu Sun Peiyang Yao +1 位作者 Dongdong Shui Jieyong Zhang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2016年第1期157-165,共9页
The platform scheduling problem in battlefield is one of the important problems in military operational research.It needs to minimize mission completing time and meanwhile maximize the mission completing accuracy with... The platform scheduling problem in battlefield is one of the important problems in military operational research.It needs to minimize mission completing time and meanwhile maximize the mission completing accuracy with a limited number of platforms.Though the traditional certain models obtain some good results,uncertain model is still needed to be introduced since the battlefield environment is complex and unstable.An uncertain model is prposed for the platform scheduling problem.Related parameters in this model are set to be fuzzy or stochastic.Due to the inherent disadvantage of the solving methods for traditional models,a new method is proposed to solve the uncertain model.Finally,the practicability and availability of the proposed method are demonstrated with a case of joint campaign. 展开更多
关键词 operational research platform scheduling uncertain model solving method.
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Comparisons of Three-Dimensional Variational Data Assimilation and Model Output Statistics in Improving Atmospheric Chemistry Forecasts 被引量:1
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作者 Chaoqun MA Tijian WANG +1 位作者 Zengliang ZANG Zhijin LI 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2018年第7期813-825,共13页
Atmospheric chemistry models usually perform badly in forecasting wintertime air pollution because of their uncertainties. Generally, such uncertainties can be decreased effectively by techniques such as data assimila... Atmospheric chemistry models usually perform badly in forecasting wintertime air pollution because of their uncertainties. Generally, such uncertainties can be decreased effectively by techniques such as data assimilation(DA) and model output statistics(MOS). However, the relative importance and combined effects of the two techniques have not been clarified. Here,a one-month air quality forecast with the Weather Research and Forecasting-Chemistry(WRF-Chem) model was carried out in a virtually operational setup focusing on Hebei Province, China. Meanwhile, three-dimensional variational(3 DVar) DA and MOS based on one-dimensional Kalman filtering were implemented separately and simultaneously to investigate their performance in improving the model forecast. Comparison with observations shows that the chemistry forecast with MOS outperforms that with 3 DVar DA, which could be seen in all the species tested over the whole 72 forecast hours. Combined use of both techniques does not guarantee a better forecast than MOS only, with the improvements and degradations being small and appearing rather randomly. Results indicate that the implementation of MOS is more suitable than 3 DVar DA in improving the operational forecasting ability of WRF-Chem. 展开更多
关键词 data assimilation model output statistics WRF-Chem operational forecast
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Developing an intermediate-complexity projection model for China's fisheries:A case study of small yellow croaker(Larimichthys polyactis)in the Haizhou Bay,China
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作者 Ming Sun Yunzhou Li +1 位作者 Yiping Ren Yong Chen 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2021年第8期108-118,共11页
Projection models are commonly used to evaluate the impacts of fishing.However,previously developed projection tools were not suitable for China’s fisheries as they are either overly complex and data-demanding or too... Projection models are commonly used to evaluate the impacts of fishing.However,previously developed projection tools were not suitable for China’s fisheries as they are either overly complex and data-demanding or too simple to reflect the realistic management measures.Herein,an intermediate-complexity projection model was developed that could adequately describe fish population dynamics and account for management measures including mesh size limits,summer closure,and spatial closure.A two-patch operating model was outlined for the projection model and applied to the heavily depleted but commercially important small yellow croaker(Larimichthys polyactis)fishery in the Haizhou Bay,China,as a case study.The model was calibrated to realistically capture the fisheries dynamics with hindcasting.Three simulation scenarios featuring different fishing intensities based on status quo and maximum sustainable yield(MSY)were proposed and evaluated with projections.Stochastic projections were additionally performed to investigate the influence of uncertainty associated with recruitment strengths and the implementation of control targets.It was found that fishing at FMSY level could effectively rebuild the depleted stock biomass,while the stock collapsed rapidly in the status quo scenario.Uncertainty in recruitment and implementation could result in variabilities in management effects;but they did not much alter the management effects of the FMSY scenario.These results indicate that the lack of science-based control targets in fishing mortality or catch limits has hindered the achievement of sustainable fisheries in China.Overall,the presented work highlights that the developed projection model can promote the understanding of the possible consequences of fishing under uncertainty and is applicable to other fisheries in China. 展开更多
关键词 two-patch operating model simulation maximum sustainable yield control targets uncertainty
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An algorithm of multi-model spatial overlay based on three-dimensional terrain model TIN and its application
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作者 王少安 张子平 龚健雅 《Journal of Coal Science & Engineering(China)》 2001年第2期45-50,共6页
D GIS spatial overlay analysis is being broadly concerned about in international academe and is a research focus. It is one of the important functions of spatial analysis using GIS technology. An algorithm of multi mo... D GIS spatial overlay analysis is being broadly concerned about in international academe and is a research focus. It is one of the important functions of spatial analysis using GIS technology. An algorithm of multi model spatial overlay based on three dimensional terrain model TIN is introduced in this paper which can be used to solve the TIN based three dimensional overlay operation in spatial analysis. The feasibility and validity of this algorithm is identified. This algorithm is used successfully in three dimensional overlay and region variation overlay analysis. 展开更多
关键词 multi model spatial overlay TIN operation model reference model
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A Study on the Operating Model of Internet + QQ Farm
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作者 Yuyu ZHANG Chengjian YONG +4 位作者 Zhixing WU Jinzhu HUA Jiani LIU Jingxiang HU Liyuan YAO 《Asian Agricultural Research》 2017年第6期11-12,18,共3页
The'Internet+QQ farm'creative agriculture presented in this paper is the innovation based on the currently booming reality QQ farm,aimed at reducing cost,improving efficiency and optimizing human and material ... The'Internet+QQ farm'creative agriculture presented in this paper is the innovation based on the currently booming reality QQ farm,aimed at reducing cost,improving efficiency and optimizing human and material resource elements.It can make Internet provide technical support for intelligence-based life,leisure,entertainment,with good prospects for development. 展开更多
关键词 Internet + QQ farm Leisure agriculture Creative agriculture Operating model
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The research on the operating models of public service platform of the Hubei province key-developing industrial clusters
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作者 WU Chuan-qing QIN Rui-dong 《Chinese Business Review》 2009年第3期8-13,32,共7页
Public service platform of industrial cluster includes Industry Association, Guarantee Agency, Productivity Center, R&D Center, Inspection and Test Center, Training Institutions, Product Center and Professional Marke... Public service platform of industrial cluster includes Industry Association, Guarantee Agency, Productivity Center, R&D Center, Inspection and Test Center, Training Institutions, Product Center and Professional Market, etc. By case study in Hubei province, local government and leading enterprises, they are the major part of public service platform constructing of industrial cluster. 展开更多
关键词 industrial cluster public service platform major part of public service platform constructing operating model
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工程理念的形成、操作化及其层次——再论工程理念 被引量:5
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作者 梁军 《西安交通大学学报(社会科学版)》 CSSCI 北大核心 2014年第6期91-95,共5页
工程理念是关于工程活动的顶层设计的灵魂,是人们从实践中不断总结和升华的,是关于工程存在总体性特征的理性认识和自觉追求。作为工程造物活动过程中的一种实践智慧,工程理念经历了从科学认识到工程实践的演化。工程理念操作化过程,通... 工程理念是关于工程活动的顶层设计的灵魂,是人们从实践中不断总结和升华的,是关于工程存在总体性特征的理性认识和自觉追求。作为工程造物活动过程中的一种实践智慧,工程理念经历了从科学认识到工程实践的演化。工程理念操作化过程,通常是通过实践模型的方式发生作用的。一般地,这种模型又根据工程造物的规模在宏观、中观、微观三个层次发挥引导和约束作用。 展开更多
关键词 工程理念 形成 操作化 (实践)模型 层次
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Modeling,Simulation,and Risk Analysis of Battery Energy Storage Systems in New Energy Grid Integration Scenarios
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作者 Xiaohui Ye Fucheng Tan +4 位作者 Xinli Song Hanyang Dai Xia Li Shixia Mu Shaohang Hao 《Energy Engineering》 EI 2024年第12期3689-3710,共22页
Energy storage batteries can smooth the volatility of renewable energy sources.The operating conditions during power grid integration of renewable energy can affect the performance and failure risk of battery energy s... Energy storage batteries can smooth the volatility of renewable energy sources.The operating conditions during power grid integration of renewable energy can affect the performance and failure risk of battery energy storage system(BESS).However,the current modeling of grid-connected BESS is overly simplistic,typically only considering state of charge(SOC)and power constraints.Detailed lithium(Li)-ion battery cell models are computationally intensive and impractical for real-time applications and may not be suitable for power grid operating conditions.Additionally,there is a lack of real-time batteries risk assessment frameworks.To address these issues,in this study,we establish a thermal-electric-performance(TEP)coupling model based on a multitime scale BESS model,incorporating the electrical and thermal characteristics of Li-ion batteries along with their performance degradation to achieve detailed simulation of grid-connected BESS.Additionally,considering the operating characteristics of energy storage batteries and electrical and thermal abuse factors,we developed a battery pack operational riskmodel,which takes into account SOCand charge-discharge rate(Cr),using amodified failure rate to represent the BESS risk.By integrating detailed simulation of energy storage with predictive failure risk analysis,we obtained a detailed model for BESS risk analysis.This model offers a multi-time scale integrated simulation that spans month-level energy storage simulation times,day-level performance degradation,minutescale failure rate,and second-level BESS characteristics.It offers a critical tool for the study of BESS.Finally,the performance and risk of energy storage batteries under three scenarios—microgrid energy storage,wind power smoothing,and power grid failure response—are simulated,achieving a real-time state-dependent operational risk analysis of the BESS. 展开更多
关键词 Grid-connected battery energy storage system thermal-electric-performance coupling model operational risk model failure rate risk analysis
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英语专业口语课程测试的模式设计 被引量:1
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作者 刘静 杨连瑞 王军利 《山东外语教学》 2005年第2期60-62,78,共4页
本文应用语言测试理论和民族志学的研究方法,针对当前英语专业口语课考试的主要问题,对英语专业学生应该考核的英语口语能力和水平做了科学界定,提出了由八项观测参数组成的多维检测语言表达准确性、流利性和得体性的英语口语课程考试... 本文应用语言测试理论和民族志学的研究方法,针对当前英语专业口语课考试的主要问题,对英语专业学生应该考核的英语口语能力和水平做了科学界定,提出了由八项观测参数组成的多维检测语言表达准确性、流利性和得体性的英语口语课程考试理论模式. 展开更多
关键词 英语专业口语课程考试 理论模式 信度 效度 可操作性
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Modeling and Operation of the Power-to-Gas System for Renewables Integration: A Review 被引量:21
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作者 Xuetao Xing Jin Lin +3 位作者 Yonghua Song You Zhou Shujun Mu Qiang Hu 《CSEE Journal of Power and Energy Systems》 SCIE 2018年第2期168-178,共11页
Power-to-Gas(P2G)plays an important role in enhancing large-scale renewable energy integration in power systems.As an emerging inter-disciplinary subject,P2G technology requires knowledge in electrochemistry,electrica... Power-to-Gas(P2G)plays an important role in enhancing large-scale renewable energy integration in power systems.As an emerging inter-disciplinary subject,P2G technology requires knowledge in electrochemistry,electrical engineering,thermodynamic engineering,chemical engineering and system engineering.Aiming at P2G modeling and operational problems concerning the research field of power systems and the energy internet,this paper briefly reviews the main technologies and application potentials of the P2G system,and makes systematic summaries of major progresses related to P2G’s integration into the power grid in a bottom-top manner,including the modeling of high/room-temperature electrolysis cells,steady-state/dynamic optimization control of the P2G system,P2G’s integrated model and operational strategies at the grid level.In the final part of this paper,suggestions are put forward on future research directions of P2G systems from the aspects of modeling and operational optimization. 展开更多
关键词 Electrolysis cell multi-energy network modeling and operation power-to-gas
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