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The analytic hierarchy process (AHP) has the special advantage in multi-indexes evaluation, and geographical information system (GIS) is good at spatial analysis. Combining AHP with GIS provides an effective means for studies of regional environmental carrying capacity (ECC) evaluation. Aiming at the regional features of ecosystem of Shaanxi Province, the synthetic evaluation index system is set up...
Hot coilbox bending rolls are important equipment for making coil in hot strip rolling line. Bending rolls include coiling speed control and rolls gap position control need position and speed synchronization. The methods of hot bending rolls control are discussed, then test in tangshan hot strip rolling line and obtain is satisfied effectly.
The paper mainly introduces the features of the shape control system of the new ultra-thin strip production line in tangshan iron and steel group Co. Ltd. Advanced shape control technology in the world has been adoped in this production line. The article mainly introduces the characteristics of the product line on equipment and control means, and emphasizes on the new thoughts of the control system...
More and more environmental risk accidents occurred in municipal areas which had posed severe threats to persons’ safety and environment quality. Control and prevention of potential risk affairs is the most significant intention of environmental risk management, while in this field, several issues are to be solved. We developed a new concept defined as risk bearing capacity to appraise the risk maximums...
This paper adopted the artificial neural network, and also introduced the combination forecasting theory, established non-linear combination forecasting model based on artificial neural networks for hydrological time series forecasting. Though practical case calculating, and using the relevant evaluation index to analysis predict results, the results showed that non-linear combination forecasting...
This paper uses linear prediction model, the natural growth model and the exponential growth model to fitted Wuhan population quantity from 1978 to 2004, and then according to the determine corresponding parameters, predicted the population quantity from 2005 to 2007 and compared, the conclusion is that the results of natural growth model and the exponential growth model are better.
The preparation process of hydroxypropyl-β-cyclodextrin was optimized to the degree of substitution and recovery in this study. A central composite design of response surface methodology involving reaction time, reaction temperature, dialysis time was used, and second-order model for the yeild was employed to generate the response surface. The optimum condition for the preparation process was determined...
In this paper, a new prediction model, based on chaos theory and BP artificial neural network, is developed to predict the risk of credit card transactions. Embedding dimension of phase-space reconstruction is used to determine network structure, and overcomes the dependence on large amount of samples. Experiments shows that the method based on combination of chaos theory and neural network can improve...
In economic computational grids, resources have prices and the users must pay for executing their applications. The user determines his deadline and budget and then requests cost or time optimization. A resource selection service that adopts cost optimization strategy should select heterogeneous grid resources for heterogeneous user applications so that their execution finishes in the specified deadline...
Along with human society's development and science technology progress, the people realize the ecological buildings are more and more important. The article has summarized the ecological buildings basic concept and the ecological buildings essential requirements, and has carried on the comprehensive elaboration to ecological building’s sustainable development, and proposed our country promising approach...
The construction management of traditional government investing project has been exposed exactly with disadvantages on the special Chinese conditions and present market environment,so the performing of Agent-construction system model has historic inevitability and practice meaning. Agent-construction system is a new project management model that appears in this years, this paper analyzes the headspring...
High-speed and heavy-load stacking robot technology is a common key technique in nonferrous metallurgy areas. Specific layer stacking robot of aluminum ingot continuous casting production line, which has four-DOF, is designed in this paper. The kinematics model is built and studied in detail by D-H method. The transformation matrix method is utilized to solve the kinematics equation of robot. Mutual...
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