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System dynamics model of the support-surrounding rock system in fully mechanized mining with large mining height face and its application

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International Journal of Mining Science and Technology 2013年第6期23卷 879-884页

作者： Yuan Yong Tu Shihao Zhang Xiaogang Li Bo School of Mines China University of Mining&Technology Key Laboratory of Deep Coal Resource Mining Ministry of Education China University of Mining&Technology

Fully mechanized mining with large mining height(FMMLMH)is widely used in thick coal seam mining face for its higher recovery ratio,especially where the thickness is less than 7.0 ***,because of the great mining height and intense rock pressure,the coal wall rib spalling,roof falling and the instability of support occur more likely in FMMLMH working face,and the above three types of disasters interact with each other with complicated *** order to get the relationship between each two of coal wall,roof,floor and support,and reduce the occurrence probability of the three types of disasters,we established the system dynamics(sd)model of the support-surrounding rock system which is composed of"coal wall-roof-floor-support"(CW-R-F-S)in a FMMLMH working face based on the condition of No.15104 working face in Sijiazhuang coal *** the software of Vensim,we also simulated the interaction process between each two factors of roof,floor,coal wall and the *** results show that the sd model of"CW-R-F-S"system can reveal the complicated and interactive relationship clearly between the support and surrounding rock in the FMMLMH working *** increasing the advancing speed of working face,the support resistance or the length of support guard,or by decreasing the tipto-face distance,the stability of"CW-R-F-S"system will be higher and the happening probability of the disasters such as coal wall rib spalling,roof falling or the instability of support will be *** research findings have been testified in field application in No.15104 working face,which can provide a new approach for researching the interaction relationship of support and surrounding rock.

关键词： FMMLMH Support-surrounding rock system sd model Disaster control Simulation analysis

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维普期刊数据库

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Interrelations Between Socio-economic Development and Environmental Quality:a Simulation Integrating System Dynamics models with GIS

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Geo-Spatial Information Science 2005年第3期8卷 176-182页

作者： YU Jie BIAN Fuling PETERSON Jim LI Pingxiang School of Remote Sensing and Information Engineering Wuhan University 129 Luoyu Road Wuhan 430079 China.

System dynamics (sd) theory has long been deployed in modeling complex non-linear interrelationships but, so far it has not been common to do the kind of modeling in support of bringing environmental sustainability policies to practice. This is largely because the challenge of including spatial data has not yet been well met. Potential for adoption of sd and GIS methods in combination is exemplified with the results of a decision-support exercise designed for simulation and prediction of the dynamic inter-relationships between socio-economic development and environmental quality for the "Wen, Pi, Du" county in Sichuan province, southwestern China.

关键词： system dynamics GIS dynamic simulation eco-economic system sd model analytic hierarchy process

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Reparameterization of Single Difference and Undifferenced Kinematic GPS Positioning models

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Geo-Spatial Information Science 2003年第2期6卷 1-7页

作者： C D Jong C C J M Tiberius GPS Research Center Wuhan University Wuhan China

A series of advantages of single difference (sd) and undifferenced (ZD) models are given as compared with the double difference (DD) model. However, rank defects exist in sd and ZD models. The reparameterization method is provided to resolve this rank defect problem by estimating some combinations of the unknowns rather than the unknowns themselves. The reparameterization of sd and ZD functional models is discussed in detail with their stochastic models. The theoretical confirmation of the equivalence of undifferenced and differenced models is described in a straightforward way. The relationship between sd and ZD residuals is given and verified for some special purposes, e.g. research on the stochastical properties of GPS observations.

关键词： reparameterization sd model ZD model residual rank defect

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Study on Participant Behavior Game of Electronic Products Reverse Supply Chain Based on ECP

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Journal of Systems Science and Information 2017年第5期8卷 411-434页

作者： Mingbao WANG Zhiping DU Hong DUAN School of Logistics Beijing Wuzi UniversityBeijing 101149China

In this paper, a game model composed of three subjects — government, manufacturer and consumer has been built by using Evolutionary Game Theory on the basis of analyzing the trilateral game strategy of waste mobile reverse supply chain based on ECP; an evolutionary equilibrium model is to be sought for by utilizing the replication dynamic differential equation method; and the trilateral game strategy’s revolutionary trend and consistency have been analyzed by means of sd simulation method when government implements the static or dynamic reward and punishment strategy. The finding results reveal that, under the static reward and punishment strategy, the revolutionary process of trilateral game strategy is always unstable whether the initial behavior strategy is unitary or ***, it is more reasonable for the government to adopt the strategy of dynamic reward and punishment, and it is also stable and reciprocal for all the stakeholders when implementing this strategy.

关键词： reverse supply chain evolutionary game sd model waste mobile phone

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An integrated analysis approach to LUCC at regional scale:A case study in the Ganzhou District of Zhangye City,China

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Research in Cold and Arid Regions 2012年第4期4卷 320-329页

作者： YouJia Liang ZhongMin Xu Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of SciencesLan.zhouGansu 730000China

Land use/cover change （LUCC） models are helpful tools for analyzing driving forces and processes of land use changes, assessing ecological impacts of land use change and decision-making for land use planning. However, no single model is able to capture all the essential key processes to explore land use change at different spatial-temporal scales and make a full assessment of driving factors and macro-ecological impacts. Taken Ganzhou District as a case study, this paper describes an integrated analysis （IA） ap- proach by combining with system dynamics （sd） model, the Conversion of Land Use and its Effects at Small regional extent （CLUE-S） model and landscape indices method to analyze land use dynamics at different spatial-temporal scales. The sd model was used to calculate and predict demands for different land use types at the macro-scale as a whole during 2000-2035. The LUCC process was simulated at a high spatial resolution with the spatial consideration of land use spatial policies and restrictions to satisfy the balance between land use demand and supply by using the CLUE-S model, and Kappa values of the map simulation are 0.86 and 0.81 in 2000 and 2005, respectively. Finally, we evaluated the macro-ecological effect of LUCC and optimized sce- nario managements of land use by using landscape indices method. The IA approach could be used for better understanding the complexity of land use change and provide scientific support for land use planning and management, and the simulation results also could be used as a source data for scenario analysis of different hydrological and ecological processes based on different un- derlying surface of LUCC.

关键词： sd model CLUE-S model LUCC landscape indices scenario analysis

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