会议名称：
The 4th Internatiuonal Symposium on Lifetime Engineering of Civil Infrastructure(第四届土木工程结构生命周期国际学术研讨会)
会议时间：
2009-10-26
会议地点：
长沙
会议论文集名称：
The 4th Internatiuonal Symposium on Lifetime Engineering of Civil Infrastructure(第四届土木工程结构生命周期国际学术研讨会)论文集
关键词：
Subway foundation pit;self-adaptive PSO;radial basis function;prediction analysis
摘要：
Particle swarm optimization (PSO) was improved to ovecome the shortcomings of PSO, and a self-adaptive particle swarm optimization (SAPSO) was proposed in paper. The SAPSO was combined with radial basis function neural network (RBF-NN) to form a SAPSO-NN algorithm. A SAPSO-NN prediction system was established for the deformation prediction of subway foundation pit. The results of an engineering case indicate that the intelligent prediction system is efficientive in the complex underground structures.
会议名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)
会议时间：
2009-04-26
会议地点：
武汉
会议论文集名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)论文集
关键词：
coupled process of solid and fluid interaction;precise integration;decoupling;computational stability;convergent speed
摘要：
Based on the Biot equations, differential equations governing the nonlinear coupled process of solid and fluid interaction are given by introducing the function of permeability tensor with respect to stress tensor. Finite element method is therefore given based on those equations. Precise integration algorithm (PIA) is applied for time discretion in finite element computation, the coupled process is therefore decoupled. Simultaneously, the convergent speed, the computational precise and the computational stability are also improved comparing with the time differencing method. The effectiveness of the algorithm is proved by project practice.
关键词：
ant colony algorithm;optimization;layout scheme;comprehensive benefit
摘要：
The regional road network is modeled as a bilaterally connected graph, and the road section property such as traffic capacity, mileage, and congestion degree are treated as the property of the connection weight of the graph. A discrete variables optimization model is proposed to improve the layout of the regional road network. The comprehensive benefits of road network is taken as the optimum objective of the optimization model, which takes the travel time costs, the transportation expenses, overall traffic capacity and etc into account. The road class, the traffic capacity, the congestion degree and etc are treated as discrete optimum variables while the limits of the road network construction investment is taken as the major constrain of the optimization model. To solve the discrete variables optimization model efficiently and acquire the global optimum, an improved. ant colony algorithm is proposed. The optimization of the layout scheme of the road network in Nanyang is taken as an engineering case to verify the methods proposed in the paper
摘要：
With adoption of high pressure water injection, the casing damage will become more and more serious with the developing time. From the process of oilfield production, it can be concluded that casing damage is closely related to seepage field changes. From the types of mechanical deformation, casing damage can be categorized into three groups: extrusion failure, tensile failure and shear failure, which are all induced by seepage. Based on fluid-stress coupling theory, the mechanism of three types of casing damage is analyzed, and also the corresponding conceptual models are built separately. Finally a case study is given. The results show that seepage has great influence on casing damage, and it is necessary to consider the seepage field especially when numerical simulation with the high pressure water injection is done. It was clarified that with the different conceptual models all kinds of water injection pressure threshold limit values can be calculated, which can provide good governing theories and advices for controlling reasonable injection and production pressure and preventing casing damage.
期刊：
ICIC 2009: SECOND INTERNATIONAL CONFERENCE ON INFORMATION AND COMPUTING SCIENCE, VOL 2, PROCEEDINGS: IMAGE ANALYSIS, INFORMATION AND SIGNAL PROCESSING,2009年:265-268
通讯作者：
He, X.
作者机构：
[He, X.; Liu, J. J.] Wuhan Polytech Univ, Dept Civil Engn, Wuhan 430023, Peoples R China.
关键词：
artificial neural network;Levenberg-Marquardt algorithm;data mining;knowledge discover;oil productive index
摘要：
Levenberg-Marquardt (shorted as L-M) algorithm is improved and adopted to train the neural network. The improved training algorithm leads to better convergence, faster convergent speed and higher precision. The proposed L-M neural network is used for geological data mining of oil productive index basing on the geological database. The process of geological spatial data mining and the geological knowledge discovering with L-M neural network are discussed. As an engineering case, data mining and knowledge discovering of the oil productive index basing on the reservoir property stored in the geological database are presented to explain the method proposed.
会议名称：
2009 International Conference on Management Science and Engineering(2009管理科学与工程国际会议)
会议时间：
2009-11-01
会议地点：
北京
会议论文集名称：
2009 International Conference on Management Science and Engineering(2009管理科学与工程国际会议)论文集
关键词：
Energy reserves;salt cavern;underground oil and gas storage;bedded salt rock;tightness evaluation
摘要：
Energy reserve is very important to world's sustainable economic growth and national security. Salt cavern has satisfactory performance because of its very low permeability by the self-healing capacity of salt due to viscoplastic deformation of the grains, causing the closure of cracks and pores. Therefore, salt cavern can be used for storing a variety of fluid products ranging from compressed air and hydrogen to LPG, natural gas and crude oil. Considering the unique stratigraphic characteristics of the laminated salt rocks in China, it has great influence on the tightness of salt carven. Based on the foreign successful experience of storage construction and tightness test methods, the salt mines in Jiangsu Jintan, Huibei Yunyin are taken as engineering background, and the in-situ and laboratory test for tightness evaluation is discussed, which will be reference value and practical significance for the research of underground storage construction project and scientific decision making.
摘要：
With rapid economic development and the progressively more intense competition, construction industries are facing the constant change, and these will bring risk to the enterprise development. Risk management is needed in the manufacturing course and has become the indispensable part of the national lash-up system. Based on the analysis of risk management situation of construction firms, the connotations of risk management are analyzed in this paper, then the necessity and approaches are also expounded. Appropriate patterns of risk management in construction industry are erected based on description and analysis of the risk and the effective methods of risk management are presented. Through systematic research and analysis, this paper intends to provide theoretical foundation for the risk management of the construction industry in China and strengthen their capabilities to evade risks.
会议名称：
International Conference on E-Business and Information System Security (EBISS)
会议时间：
2009-01-01
会议地点：
Whuan, China
会议论文集名称：
2009 International Conference on E-Business and Information System Security (EBISS). [v.1]
关键词：
E-government;One-stop;Application;Model
摘要：
The need for a client-centered approach in government was originally asserted in the context of the New Public Management movements and has had a decisive influence on the E-government arena. One-stop government accomplishes client center by integrating services from the client perspective, either by coordinating processes at the front of office or by integrating them at the back-office. E-government is the organic combination of information technology and government management function. From the point of service integration, One-stop E-government service integration can take CRM as the idea, VO as the method and TQM as the guarantee. Then, following such a principle of making the application convenient, making the examining and approving declined, making the transaction normative and making disposal transparent, One-stop E-government application model and its function are put forward based on the combination of above-mentioned CRM, TQM and VO.
会议名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)
会议时间：
2009-04-26
会议地点：
武汉
会议论文集名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)论文集
关键词：
High porosity;Porous media;Permeability;Numerical experiment
摘要：
In order to get a permeability model for porous media with high porosity, a numerical experiment was conducted, in which 25 regular porous media models with different porosity are structured by grains of six size and different distance between them and all of the porosity of the porous media models is higher than 0.6, the minimum 0.6094, and maximum 0.8264. By simulating the fluids flowing in a porous media model, the velocity field in it can be obtained, and flux per thickness can be got by integral the velocity on the outlet boundary. Then, the permeability of this porous media model can be calculated using Darcy's law. The results show that the permeability of porous media with high porosity exponentially increases along with the increase of porosity, and the higher the porosity is, the quicker the permeability increases. Permeability is also increases with the increase of grains size. We still adopt the relationship given by Carman-Kozeny theory and thus proposed a simplified permeability model for porous media with high porosity. This model will have implications to design and optimization of porous material with high porosity.
摘要：
An innovative composite modifier(ICM) which comprises a mixture of three cementitious components was used for sludge drying and stabilization. Effect of ICM components on sludge moisture content was analyzed using uniform design and the optimum composition of ICM was determined by computer aided modeling and optimization. Sludge stabilization experiments were carried out by optimized ICM and quicklime respectively and the results showed that ICM behaved more effectively in sludge drying within a lower proportion(<40%) than quicklime. X-ray diffraction of ICM hydrates revealed that the drying process took place through the speedy formation of ettringite, changing most free water of sludge into crystal water. Different from thermally treatment of sludge, this work presents a potentially economical and convenient method for sludge semi-drying.
摘要：
Water sometimes is very important in the tunnel stability analysis. So water factor should be considered if analysis the tunnel stability that is hydraulic coupled analysis. Through hydraulic coupled analysis for tunnel, the result can be close to the real. As now the three-dimensional continua fast Lagrangian analysis software FLAC3D is employed in the analysis. Using finite-difference method, water seepage fields before and after reservoir built were simulated, and by compared the results, the author studied the effects of water-head change on ground water seepage in tunnel.
关键词：
Image segmentation;Kring interpolation algorithm;3D reconstruction;Matching cube method;Microstructure of the rock
摘要：
A new image segmentation algorithm based on the Kring interpolation algorithm is proposed to segment the CT images of the rock into pore systems and the mineral grain systems. With the method, the CT image of the rock is segmented without isolated island by analyzing the correlation between the pixels of the Image. The 3D microstructure of the pore system and the mineral grain system in the rock sample are reconstructed basing on the segmented images with matching cube algorithm, in which the volume element is reconstructed with 3-dimensional interpolation method and the equipotential surface is analyzed by triangular facet method. The reconstructed microstructures are verified by slice images in two other orthometric directions and the results prove that both the distribution and the shape characteristic of the pores and mineral grains in the reconstructed microstructure arc in coincidence with that in the actual CT image with statistical significance.
会议名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)
会议时间：
2009-04-26
会议地点：
武汉
会议论文集名称：
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)论文集
关键词：
macro traffic flow;hydromechanics;traffic press;viscosity theory
摘要：
Traffic flow theory, an interdisciplinary subject, applies mathematical and physical method to describe the traffic characteristics. It's a developing theory thus so far no comprehensive theory has been formatted in this field. When analyzing the similar characteristics between traffic and liquid flow, the macro traffic flow model based on the hydromechanics theory is established by adopting the hydromechanics method, and in the case of permanent traffic flow, the macro traffic flow model is solved and the definition of traffic press is given. Traffic flow takes on a flow-resistance condition on occasions when the density is high, as a result, according to the viscosity theory of liquid, the viscous macro traffic flow model is set up.
会议名称：
2009 International Conference on Measuring Technology and Mechatronics Automation(ICMTMA 2009)(2009年检测技术与机电自动化国际会议)
会议时间：
2009-04-11
会议地点：
张家界
会议论文集名称：
2009 International Conference on Measuring Technology and Mechatronics Automation(ICMTMA 2009)(2009年检测技术与机电自动化国际会议)论文集
关键词：
Pavement engineering;prediction method of the pavement performance;gray forecasting;expressway;GM (1,1) model
摘要：
The empirical regression model was selected for forecasting the preventive maintenance time; the grey system theory was used to determine if pavements were fit for preventive maintenance. Combined with the instance, on the forecasting of the pavement performance for an expressway, the application of the grey system theory was introduced.
摘要：
Performances were conducted to analyze the sisal fiber modified asphalt mixture and no fiber modified asphalt mixture such as rutting test, cracking test and moisture sensitivity test etc. A certain groups of comparative tests were conducted by adding the different length and different quantity of the sisal fiber toward the bituminous mixture. The various performance curves were drawn and the best length and the best quantity of the sisal fiber in the bituminous mixture were determined based on the results of these comparative tests. The tests results show that the sisal fiber additive could improve the performance of asphalt mixture significantly. In addition, the sisal fiber modifier could also improve the cohesive force of asphalt and enhance the ability against distortion. It is suitable for road surface material.
摘要：
The purpose of this paper is to improve the risk evaluating quality of engineering item. The topology structure of evolutionary algorithm based BP (EABP) neural network is described, the principle of EABP neural network is introduced, and the implement step of EABP neural network is given. The combination algorithm is applied to risk evaluating for the engineering item, and its result is compared with that of conventional BP neural network. The comparing result shows that EABP neural network fits to complex system such as risk evaluating for engineering item, it improves in a certain extent on training speed and precision, it can improve the quality of engineering item risk evaluating, and it fits to solve some problems in which evaluating indexes weights are difficult to be determined or there exists complex non-linear relation among them.
摘要：
This paper analyzes the current situation of our country's building industry, in view of the problems surrounding the building industry; the building industry needs new management method. This paper introduces supply chain and core competitive power, expounding on the significance of supply chain and core competitive power. In order to make a greater contribution to the development of Chinese building industry, it is very necessary to use supply chain. Finally this paper puts forward the measures of using supply chain to improve the core competitive power of building industry.
关键词：
Jingzhou Yangtze River Bridge;venue;sandy soil liquefaction;experiential discrimination
摘要：
Through analyzes the engineering geological characteristics of the Jingzhou Yangtze River Bridge-site's foundation, has drawnout the question which sandy soil liquefies at this kind of location. On this basis, the discrimination method of sandy soil liquefaction has been chosen, and probe into the three experiential methods of sandy soil liquefaction. With these three methods, evaluated the Jingzhou Yangtze River Bridge-site's foundation according to the actuals of project, and put forward the basic design of Jingzhou Yangtze River Bridge.
