bluuebunny/crossref_metadata_2025 huggingface dataset:
Ultimate Bearing Capacity Analysis of Long-Span Continuous Stone Arch Bridge
Authors: Hu Da Lin , Jiang Kai , Sun Qi Xin , Han Lin
Published: August 2011

In the past 50 years, many long-span continuous stone arch bridges have been built in China. Analysis of mechanical performances and load capacities of long-span continuous stone arch bridges has important significances for the safety assessment of the similar bridges. 3D elastoplastic finite element method is employed to analyze ultimate bearing capacity of a three-span arch bridge with sandstone masonry in this paper. The characteristics of structural geometric and material nonlinearities and cracking and crushing of the masonry are taken into account. Compared with single-span arch bridge, both the coaction of spandrel structure and main arch and the influence of loading arrangements on ultimate bearing capacity is analyzed. The failure characteristics of the structure under the ultimate load are also introduced. The analysis results and conclusions can be referenced for the safety assessment of similar bridges.
Optimization of Large-Tonnage Lead Rubber Bearing for Highway Bridge
Authors: Zhao Guo Hui , Zhao Jian Hui , Zhang Xin
Published: August 2011

A 10000kN lead rubber bearing is taken as an example to study the energy dissipation mode of isolated bridge and optimal lead rate of the bearing. Bilinear spring model considering the effect of real lead rate on the stiffness is used to simulate the bearing. Optimization of the lead rate in different site soil conditions and different axial compression ratio of pier is carried on by using nonlinear dynamic time history analysis. It is shown that the axial compression ratio of pier has great influence on the energy dissipation mode of isolated bridge and the optimal lead rate of the bearing. Site soil conditions have little effect on the energy dissipation mode of the isolation bridge and the optimal lead rate when the axial compression ratio of pier is fixed.
Applicability Study on High Damping Rubber Bearing for Highway Bridge in Soft Soil
Authors: Zhao Guo Hui , Zhang Xin , Zhang Wen Hua
Published: August 2011

In this paper, applicability study on high damping rubber bearing for highway bridges in soft soil conditions is carried out by using nonlinear time history analysis. 5-span continuous girder bridges with same superstructure but different substructure stiffness are taken as case bridges. Artificial ground motions with long characteristic period were fitted for the analysis. Seismic response comparison of case bridges with high damping rubber bearing and laminated rubber bearing show that: high damping rubber bearing does not prolong the natural period of the bridge, so compared with laminated rubber bearing, it acts more like a damper than isolator during strong earthquake. And the substructure stiffness of the bridge has great influence on the damping effect of high damping rubber bearing. When the substructure of the bridge is too flexible, the high damping rubber bearing has little damping effect. But, when the substructure of the bridge is rigid, the high damping rubber bearing still have great damping effect even in soft soil.
Comparison of Two Methods on Population Prediction in Small Town Planning
Authors: Gu Feng Xia , Liu Wen Bao
Published: August 2011

Accurate population prediction has fundamental importance in small town planning. In this paper, two empirical prediction models, integrated growth rate and regression analysis, have been developed with demographic data of 2000-2005 in Gaotang county, Shandong province. The two models were then applied to predict the population in 2008, and their results were compared with the actual population, respectively, to evaluate the modeling accuracy. The results showed that both methods were capable of providing accurate population prediction; however, the accuracy of the integrated growth rate was a little higher than that of regression analysis in terms of their differences from the actual population in 2008.
Study on Key Techniques of Parametric Design System Based on Solid Works and KBE
Authors: Yao Du , Chang Zhi Yong , Zhao Jie , Dou Yang Liu
Published: August 2011

This paper analyzes the current status and inadequate of three-dimensional parametric design, and introduces the conceptions and principles of KBE (Knowledge Based Engineering) technology and the parametric design. The key techniques of parametric design system are studied based on the platform of combination of SolidWorks as three-dimensional feature modeling software, Microsoft Access as supported database and Microsoft Visual Basic as the development tool. Firstly, we divide the product into modules by functions. Secondly, invoke corresponding knowledge and methods of design and calculation in the KBE knowledge base to perform design and calculation. Then we use parametric modification method combined with equations, values link and design tables to get the parametric models, judge the rationality of the design parameters through finite element analysis, and create the drawings which meet the processing and production requirements using drawings automatically adjustment technology. Finally a case study of stacker design is given to validate these techniques of parametric design system, and show that the techniques have great significance for improving product design quality, shorting the design cycle and improving the competitiveness of enterprises.
Design and Maintenance of Porous Concrete Pavement
Authors: Elguemri Noureddine , Fan Ying Fang
Published: August 2011

Porous concrete is commonly used by ecologically sound construction companies, since it helps to manage water runoff in sustainable way. Many so-called “green” builders promote the use of porous concrete in their projects [1]. Although porous concrete is a viable material that has the potential to replace the use of traditional concrete pavements in situations where heavy traffic is limited, porous concrete has been predominantly used in non-pavements applications, with only a limited use in pavements applications. This paper provides a clear indication of design and maintenance of porous concrete in pavements applications. Various designs of porous concrete pavement were schematized and explained.
The Green Roof Promotion Strategies for the Municipalities
Authors: Shiah Guan Chyun
Published: August 2011

This study developed municipal green roof promotion strategies by reviewing successful green roof initiatives of the international municipalities. This paper consists of three major parts: the first introduced some green roof initiative policies in some cities. The second part of this paper employs the key findings of some municipal governments have set green roof policies and program to assist the government policy makers can better determine which policies suit their needs. The third part of this paper is to propose some green roof promotion strategies for the municipalities to pursue the goals of energy-saving carbon reduction and ecological-compensation for the cities.
Development of Digital Image Correlation Technique to Monitor Structural Damage Based on Natural Frequency as Damage Index
Authors: Sung Wen Pei , Shih Ming Hsiang , Tsai Feng Jen
Published: August 2011

Recently, some serious earthquakes happened in the world and seriously threaten the safety of the life and property of the people. Monitoring and measuring the quakeproof capacity of building need to install high cost sensitive instruments to provide sufficient information. A cost-effective and reliable method based on the applying digital image correlation method, DIC to monitor the natural frequency of building under excitation of earthquake as damage index is proposed in this research. Using DIC to monitor the structural damage based on the natural frequency as damage index can easily detect the structural damage after the excitation of earthquake. Test results reveal that sensitivity of this DIC method is superior to traditional data collected by installed accelerometers, ACC in structure.
Analysis Accuracy of Digital Image Correlation Technique to Monitor Natural Frequency Response of Building under Dynamic Excitation
Authors: Shih Ming Hsiang , Sung Wen Pei , Tsai Feng Jen
Published: August 2011

Strong typhoon and earthquake seriously threaten the safety of the life and property of the people. A cost-effective and reliable method is proposed to monitor the natural frequency response of building under excitation of external forces based on the applying digital image correlation method, DIC. The analysis accuracy of this dynamic DIC method is tested and verified by comparing with numerical analysis program, accelerometers, ACC and fast Fourier Transform, FFT. The test results reveal that the analysis accuracy of this DIC method near to the ACC and FFT traditional experimental methods. They demonstrate that using this DIC method to detect dynamic response of building under the excitation of external force has high practicability.
Research on Panoramic Digital Video Mosaic Algorithm
Authors: Huang Hua De
Published: August 2011

The paper briefly sums up the digital video panorama stitching steps, core issues and common registration algorithm on the base research of panoramic digital video technology. Also image registration algorithm based on feature line segment ratio is applied to educational panoramic digital video production. Examples have shown that the algorithm has good results in convergence rate, accuracy, and workload and so on, which has proved valuable in the digital video research. The advantages and disadvantages of the algorithm are summarized for the further study.
Decoupling Control of Three Phase Boost Type PWM Rectifiers Based on Storage Function
Authors: Wang Jiu He , Yin Hong Ren
Published: August 2011

Based on the model of three phase boost type PWM rectifier in synchronous dq coordinates, a simple control law, which transforms the rectifier control system into decoupling and linear one,is deduced based on storage function. New rectifier control system based on the law has many advantages, such as simpler structure, and low total harmonic distortion,and good robustness for load. Decouping control system of three phase boost type PWM rectifiers is proved feasible by simulink simulation.
Study of the Risk Based on Construction Logistics by Fuzzy Analytic Hierarchy Process
Authors: Zhang Jian Wei , Zhu Min Jie , Zhang Li Wei
Published: August 2011

There is all kinds of risk consisting in every logistic transportation link of construction because of the bigger construction transportation district and the more complex transportation goods, a wide variety, quantity, and so on. Any question in a single of earlier link happened will affect accuracy, security and timeliness of indicator. This paper constructs evaluation index system and evaluation module by Analytical Hierarchy Process (AHP) and Fuzzy Comprehensive Evaluation(FCE).
Wind Flow Simulation of Scale Model of TTU Test Building
Authors: Shi Bi Qing , Liu Shuai , Xie Zhuang Ning
Published: August 2011

A study of approach wind flow simulation of the low-rise building was performed in a boundary layer wind tunnel at Shantou University. Three kinds of experimental configuration are employed to simulate the suburban terrain. The characteristics of three types of simulated flow are presented. The wind tunnel testing of low-rise building, 1 : 30 geometrical scale model of the Texas Tech University test building was performed in the simulated flow. The model and full-scale pressure coefficients are presented for high-turbulence boundary layer flow. The comparison of the scale model and full-scale model building point pressure exhibits a good agreement for most of the pressure taps.
3-D Numerical Simulation for Large-Diameter Cast-In Situ Tubular Pile
Authors: Li Jun , Zhou Jian
Published: August 2011

Large-diameter cast-in-situ tubular pile (shorted as LTP) is a new, efficiency and energy saving, environmental protection pile and has been widely put into use in the foundation treatment. Using finite element method (FEM) to analyze and study the behavior of LTP is a very effective research method. This paper adopted the finite element computation software ANSYS 11.0 to conduct a 3-D numerical simulation for the LTP of a typical project. In this paper, it introduced how to realize the finite element model, specifically discussed how to select the appropriate key parameters and proposed an effective method and steps base on experience to determine the key parameters. By calculating, compared the calculated Q-S curve with the measured one and then analyzed the settlement behavior and the inner friction distribution of LTP, it is found that the inner friction only emerge at the bottom of the soil core and the upper part nearly does not have friction. The critical point in depth decreased and the maximum inner friction increased with the increasement of the load. Under the ultimate load, the sphere of influence of LTP decreased rapidly and the inner friction increased significantly.
Low Cycle Fatigue Behavior of High-Strength Structural Steel under Biased Strain Control
Authors: Luo Yun Rong , Guo Yi , Wang Qing Yuan , Liu Yong Jie
Published: August 2011

The low cycle fatigue (LCF) behavior of high-strength structural steel under biased strain control has been investigated. Seven strain ratios with constant maximum strain amplitude were adopted. Significant cyclic softening and mean stress relaxation were observed in all cases. The fatigue life under biased strain control could be well predicted by Coffin-Manson relationship. Fractography by scanning electron microscopy was used to determine the LCF failure mechanisms and fatigue crack propagation modes.
Water Pressure Numerical Analysis of Lining Structure in Mountain Tunnel
Authors: Wang Xing Hua , Tu Peng
Published: August 2011

It is hard to control the high pressure water in mountain tunnel construction. Distribution of seepage field, stress field and displacement field of tunnel are analyzed by numerical method with equivalent continuum model. And distribution rule of groundwater in rock, grouting circle and lining are also analyzed. The results of the study show that water pressure behind lining has a close relationship with rock, grouting circle, thickness of lining, permeability coefficient and drainage of tunnel.
An Interestingness Measure and Computation Method of Association Rules Based on Frequent Itemsets Relatedness
Authors: Chen Xiang , Zhou Xue Feng , Zhang Yong
Published: August 2011

To address inadequacy of association rules interestingness measure method currently, we present a novel method to measure interestingness with relatedness among items in frequent itemsets. It firstly computed relatedness between frequent k-itemsets and each subset of frequent 2-itemsets, which is a linear combination of Complementarity Intensity (CI), Substitutability Intensity (SI) and Mutual Interaction (MI). The mean of relatedness of all frequent 2-itemsets subsets was regarded as relatedness of frequent k-itemsets. Finally weighted computation method of association rule interestingness was given according to principle of objective interestingness of association rule is inversely proportional to relatedness of frequent itemsets. The method can not only sort rules, but also analyze actual relationship among all items in frequent 2-itemsets, which is conductive to selection of users on rules.
Study on Bicycle Signal Timing Algorithm at Signalized Intersection
Authors: Yu Quan , Shi Li Ping
Published: August 2011

According to the characteristics of the bicycle traffic flow, the bicycle green time is divided into the maximum queue dissipation time and the time of bicycle cluster center running to the opposite lane, and the formulas are given respectively in this paper. Validation is done based on intersection bicycle data of Beijing city and Tianjin city. Results show that the green time calculated by considering the bicycle cluster meets the interval of bicycles passing through the intersection, which enriches the signal timing algorithm at signalized intersection.
Highway Tunnel Lighting Research Based on Mesopic Vision
Authors: Yang Yong , Zhu Chuan Zheng , Wang Lei
Published: August 2011

The white LED and high-pressure sodium lamp (HPS) are used to simulate highway tunnel lighting under different background brightness (abbreviated as B) conditions, from a series of reaction time tests, the result shows that white LED can provide shorter reaction time for observers compared with HPS, further research suggests under the mesopic vision, different kinds of light sources maybe have unlike brightness, although which is identical under the photopic vision. From the luminous spectrum test and mesopic vision spectral luminous efficiency function fitting calculation, the mesopic equivalent brightness can be determined with certain light source and B value. This conclusion would provide a more accurate and lower energy consumption lighting design method for highway tunnel.
Study on New Algorithm to Search Critical Slip Surface of Slope
Authors: Gao Wei
Published: August 2011

Generally, there are two types of critical failure surface of slope, which are circular surface and non-circular surface. To circular slip surface, the search of slip surface can be transformed to search of coordinates of the circle center and radius. While to non-circular slip surface, the search of slip surface can be transformed to search of coordinates of some reference points on slip surface. So, the search on slip surface of slope is a very typical optimization problem. To solve this problem, one new optimization algorithm-continuous ant colony algorithm is introduced. At last, through a typical numerical example, this new method is verified.
Study of Stability against Up-Sliding of High Arch Dam
Authors: Xu Fu Wei , Chen Hai Yu
Published: August 2011

Aimed at stability against up-sliding that the dam engineers have concerned closely, in this paper combining two models of arch dam, the analysis of 3-D finite element method has been carried out about shear of contact face between foundation and high arch dam, we concluded probability of stability against up-sliding along contact face between foundation and high double curvature arch dam was little, but the problem of stability against up-sliding at high single curvature arch dam was existed, so we should study its stability against up-sliding.
Study on the Levenberg-Marquardt Neural Network Model for Rock Rheology
Authors: Jiang Yu Zhou , Wang Rui Hong , Zhu Jie Bing
Published: August 2011

Rheological experiments were carried out for sandstone and marble specimens from left bank high slope of Jingping First Stage Hydropower Project by using the rock servo-controlling rheology testing machine. Typical triaxial rheological curves under step loading and temperature curves in the process of rheological experiment were gained. BP neural network is improved by Levenberg-Marquardt algorithm. Improved neural network model for rock rheology is established in accordance with the rheology experimental results of rock specimen. The improved neural network model was used to forecast rock rheological experimental curves, and the result shows that the forecasted rock rheology curves are closely accorded with the experimental result. The improved neural network model takes into account the influence of loading history and temperature difference on the rock rheological deformation, and the forecasted result can reflect better the rheology deformation behavior of rock material.
Research on Interchange Ramp Circular Curve Radius Based on Land-Saving Method
Authors: Sun Jia Feng , Yang Ning , Li Juan , Qiao Jing , Qiao Jian Gang
Published: August 2011

As an important part of expressway, interchange has space multi-layer structure form and function of stereoscopic transportation steering, which transforms traffic flow, combs and controls traffic. At present the overpass occupies excessive land and large-scale project, which is serious waste of land resources. Under the premise of ensuring road capacity and traffic safety, in order to save land resource, based on Traffic Engineering, Psychology and other theory, the paper used the method of combination of computer simulation and field experiment, that’s through simulation of a driving simulator cabin got the tensity threshold of driver’s psychological and physiological reaction. Field tests were carried on about cars and drivers on the 68 expressway interchanges in Liaoning and Hubei province by using MC5600, dynamic driver heart physiological tester and other equipments. In addition, the paper surveyed the speed of the vehicle on the road and drivers’ psychological and physiological reaction, constructed mathematical model of driver tensity through analyzing feature point velocity and law of drivers’ psychological and physiological reaction, put forward suggested value of land-saving ramp circular curve radius ensuring traffic safety and service level from the point of speed consistency and driver tensity, which would make expressway interchange design meet the concept of economical highway. Therefore, the paper ensures the quality of highway geometric design as well as improves the effectiveness of highway construction and operation.
Quality Control of EPS External Wall Thermal Insulation System
Authors: Ma Xiao Qiu
Published: August 2011

To ensure the construction quality of EPS external wall thermal insulation system , need to controll raw materials, construction conditions, construction methods and quality control acceptance criteria and other aspects
Temperature Control of Massive Concrete for Construction of Pier’s Base
Authors: Yang Ya Xun
Published: August 2011

For the hydration heat generated by the massive concrete during the construction of the pier’s base, the methods and operation processes of temperature control are presented in this article, using the finite element program MIDAS analyze the massive concrete temperature field of the hydration heat during the construction of the base. Besides, temperature control program for the construction of massive concrete, simulation of the calculation result and controlling calculation following the process of the construction compared with the data of temperature monitoring are introduced. The result of analysis and calculation could be a reference for the similar construction.
Remeshing Technique for Three Dimensional Finite Element in ABAQUS
Authors: Wang Chun Guang , Chen Cong , Wang Wei , Shi Hong Bin , Liu Hong Chao
Published: August 2011

To resolve the divergence problems in three-dimensional finite element simulation caused by the mesh distortion,put forward a three-dimensional remeshing technique in ABAQUS by making use of the good interface between ABAQUS and HYPERMESH.Simulated a rubber block compression process using this technique.The results show that:1). the grid distortion at sharp corners has been improved significantly and this remeshing technique can attain reliable results,especially in three-dimensional models with the large deformation;2). the initial analysis load capacity should be reasonably determined in order to obtain the better remeshing results.This technique can resolve the problems brought by the mesh distortion very well.
Pipeline Product Quality Testing Based on Adaptive SIFT Matching Technology
Authors: Qu Ju Bao , Wang Shu Juan
Published: August 2011

The problem of product quality testing on the assembly line is proposed SIFT-based adaptive algorithm and Harris corner supplementation, achieved through the SIFT matching the product point of view, position, brightness, distance calibration, the product matches the partition testing strategy to ensure that the product accessories The number and quality of the normative. Experimental results show that the detected speed and robustness.
Study on Application of Support Vector Machine to Prediction of Blasting Vibration Velocity
Authors: Wei Hai Xia , Zhu Jie
Published: August 2011

Based on the nonlinear regression theory of Support Vector Machine, SVM model was put forward to predict blasting vibration velocity by using monitoring data obtained in blasting site as training samples. By comparing the results of the two prediction models of the improved Sadaovsk and SVM, the feasibility of the new learning method of SVM model was verified, which will provide a new way to predict and control intensity of blasting vibration. The best way to select the parameters of SVM needs to be further explored.
Study on the Comparison of Construction Project Transaction Mode in Owner’s View
Authors: Wang Kai , Jiang Lin
Published: August 2011

Nowadays, a great variety of construction project management modes are likely confusing. Firstly, according to contract mode and management mode, transaction mode involved in the process of construction project transaction is classified. Secondly, transaction mode is compared and analyzed on the scope of application, the characteristic of management, general effectiveness in owner’s view. The differentia of transaction mode is analyzed in many respects. This analysis is helpful for practitioners to understand and apply transaction mode of construction project.
Decorative Mortise Slot Insulation Board Exterior Insulation System Integration and Quality Control of Construction Elements
Authors: Liu Yi
Published: August 2011

This paper used for exterior insulation system, a new form - decorative mortise slot insulation board exterior insulation systems integration, construction technology, a careful study and discussion, and through concrete examples and practical engineering Construction, operation points of the construction and quality control.
An Exploration of Establishment of Green Building Evaluation Standards Weight System Based on Analytic Hierarchy Process
Authors: Liu Shu Liang , Hao Peng Liang , Song Yun Xia
Published: August 2011

Green building is the inevitable trend of future building development, many countries have formed their own green building assessment system. For now at stage of rapid development of urbanization in China, the establishment of green building assessment system and its further improved are of great significance. As a scientific evaluation system, the index of green building assessment system should have a sound weights system. This article attempts to apply the Analytic hierarchy process method to the Green Building evaluation standards of China, which intend to explore the method of constructing the weight system of China Green Building Evaluation standards.
Study on Key Techniques of Control System for Dry-Mixed Mortar Production Line
Authors: Zhang Huan
Published: August 2011

As a new energy-saving and environmental protection building material, dry-mixed mortar has been promoting actively in China. The key techniques of control system for dry-mixed mortar production line were introduced in this paper, which was mainly based on PLC and smart weighing instrumentation. Firstly, the technology process and control demands were presented. Secondly, control system configuration, control strategy were proposed in detail. Finally, the key intelligent adjust algorithms were described as well. The practical operation verifies that the control system is highly reliable and stable, and it greatly enhances the level of automation and weighing accuracy of the raw material and meets the equipments requirements of energy-saving and green running.
Optimal Scheduling for Port Logistics Alliance Operations Based on Genetic Taboo Hybrid Algorithm
Authors: Zhang Wei , Wu Rong
Published: August 2011

In this paper, optimal scheduling on logistics task and logistics resources for the port logistics alliance operations is discussed, the logistics service cost and time of each node is comprehensively considered, in order to establish a multi-objective optimization model. At the same time, improve genetic algorithm in use of the advantage of tabu search climbing ability to design a genetic taboo hybrid algorithm, which enhances the solution efficiency. Hope this study can effectively realize optimal allocation on logistics resources and tasks for port logistics alliance.
Prediction of Water Inrush from Coal Floor Based on Fisher Discriminant Analysis
Authors: Huang Ping Hua , Chen Jian Sheng
Published: August 2011

Based on the theory of Fisher discriminant analysis, this paper aims to develop the Fisher discriminant function model by using the representative water inrush data from the floor of coal mining face, considering comprehensively the factors that affect the water inrush from coal floor. The predicted result is consistent with the actual situation, which corresponds with or better than that of the least squares support vector machine, artificial neural network, and so on. The results indicate that this model is a new effective way of predicting the water inrush from floor and can be widely used in the practical engineering because of the low resubstitution error rate and good distinguishing performance.
Design of Ball-Beam Control System Based on Machine Vision
Authors: Lv Xiao Hu , Liu Yong Xin , Liu Yu , Huang Hai Yan
Published: August 2011

The nonlinear Ball-beam system combine with a CCD camera is studied in this paper. The images which include Ball-beam system and a ruler are collected by CCD sensor. The image is segmented using the adaptive image binarization threshold algorithm, and then the ruler, the ball position and the pointer position are extracted from the image. The ruler is scaled and the pointer position is also calculated. Finally, the value of pointer position is input into Ball-beam system as an expected ball balance position. A Fuzzy self-tuning PID controller and a BP neural network PID controller are designed for ball balance stable control. After experimental, the Ball-beam balance control in any position can be fulfilled using both of algorithms.
Optimized Aggregate Gradation for Bangladesh
Authors: Fatmi Mahmudur Rahman , Islam Bushra , Rahman Md.Mustafizur , Hasi Annesha Das , Noor Munaz Ahmed
Published: August 2011

Aggregate is one of the most important and strength determining ingredients of concrete as it serves as reinforcement and occupies three quarter of the total volume of concrete. Moreover, for good compact concrete, aggregate with minimum void is always desirable. This paper represents a study on obtaining the effective dense gradation by combining naturally available aggregate in Bangladesh. In this purpose a program has been developed based on analytical approach to find out the desired mix proportion of different aggregate samples to reach the target of getting an compact, economic and environment friendly concrete. Finally after preparing the concrete in the laboratory with different mix design ratio and combined gradation of prepared single sized aggregate is found to have 20% more strength than that of the concrete made with the same design mix and combination of aggregate gradation presently available in the industry.
Application of Concept Design in Structural Design Software
Authors: Zhou Xue Feng , Chen Xiang
Published: August 2011

Concept design is the heart and soul of structural design. Combining with applications of PKPM series computer construction structural CAD system software, the paper described that software has some applicability, limitations, and approximate in practical construction applications. The structural design personnel should start from structural concept and par more attention to value of calculation parameters, computing model processing and calculation results determination, so as to ensure safety, economy and rationality of structural design.
Digital Image Correlation Search Method Based on Particle Swarm Algorithm
Authors: Yang Song , Shao Long Tan , Zhao Bo Ya , Liu Xiao , Lin Gang
Published: August 2011

Digital image correlation method is an important optical technique for surface displacement and strain measurement. An approach based on Particle Swarm Optimization algorithm for sub-pixel correlation search is described in this paper. The new Algorithm does not involve reasonable guess of displacement and deformation gradient and the calculation of second-order derivatives of the digital images. Benefiting from the abilities of global optimum and parallelism searching, and compared with genetic algorithm, the new approach can complete the sub-pixel correlation search with high accuracy and less computational consumption. Computer-simulated images are then used to verify this method. The experimental results show that the new approach is a practicable sub-pixel searching method.
The Construction of Mathematical Model for Electromagnetic Torque Online Measuring System with Three-Phase Induction Motor
Authors: Meng Qing Bo , Zhang Gui Xiang
Published: August 2011

Based on the coordinate transformation, the paper analyzes and constructs the mathematical model for electromagnetic torque online measuring system with three-phase induction motor. Additionally, the author proposes the improved scheme for model limitations. The system can meet the random and fast requirements on the occurrence and measurement of the three-phase induction motor torque and has high practical engineering value.
Experimental Study on Solidified Sludge with High Water Content
Authors: Wang Zhe , Hu Ju Hao , Yan Li Li
Published: August 2011

A good deal of high water content sludge which is produced in engineering construction, with high water content, low strength, high compressibility, low permeability, high sensitivity and other undesirable engineering properties, and often contaminated. How to deal with and make rational use of high water content sludge becomes the hot topic discussed by engineering and academia. The material used in this study is sludge with high water content from the Metro construction sites in Hangzhou. In this paper, our main research is the influences of the different contents of cement, lime, gypsum, fly-ash on the curing strength character of silt. The product structure was analyzed by XRD.
Ideas and Methods of Renewal Transformation of the Existing Urban Buildings
Authors: Ye Jun , Fang Hong Qiang
Published: August 2011

Base on renewal transformation practice of urban buildings, firstly new green reconstruction ideas are put forward aiming at improving and enhancing work performance and safety performance of urban buildings, enhancing ability resist earthquake, typhoon, etc, guaranteeing the safety of people's lives and property, improving the efficiency of resource utilization, energy-saving, land-saving, water-saving, material-saving, protecting and improving the environment, prolonging service life of existing buildings. Secondly, system of technical standards for renewal and reconstruction of urban buildings is established, which includes aspects of exploration, inspection, identification, evaluation, design, construction, project acceptance, and operation management. Finally, a new green reconstruction mode of existing buildings is presented. It has been proved the effectiveness through applications and practices for many years.
Water Environment Risk Assessment System and Practice of Management for the Three Gorges Reservoir Based on List Method
Authors: Guo Li Ping , Liu Ju Mei , Chen Shuang Kou
Published: August 2011

In view of the water impact of environmental risk of industrial enterprises in the Three Gorges Reservoir, based on the existing methods of water environmental risk assessment and integrated the Germany detailed list assessment method; we have established a brand-new index system which could meet with the Three Gorges Reservoir water environment risk evaluation, and the system has the feature of quantitative indicators and risk classification. Site Case analysis showed that: evaluation results and the qualitative judgment are on the spot consistent with the environment Supervisory department, which demonstrated that the risk assessment system is reasonable and has easier operability. Meanwhile the system could help the enterprise and the environment Supervisory department to investigate water environment hidden danger, reduce the enterprise water environment risk effectively and provide the scientific basis for the environment Supervisory management's decision-making and the management.
Intelligent Evaluation Model for Cementing Quality Based on PSO-SVM and Application
Authors: Liu Jing Cheng , Wang Hong Tu , Zeng Shun Peng , Yuan Zhi Gang
Published: August 2011

The cementing quality is directly related to the normal operation of the gas well, therefore, the evaluation of cementing quality is key to the correctly use the gas well as well as to take measures to protect the gas well. In this paper, four first wave amplitudes at the same depth point when using the borehole compensated sonic logger with double transceiver technique to carry out the acoustic amplitude log operation are served as the discriminant factors to evaluate the cementing quality. Taking the engineering actual measured data as the learning samples and using the particle swarm optimization to optimize the parameters of support vector machine, this paper established the intelligent evaluation model for cementing quality based on particle swarm optimization (PSO) and support vector machine (SVM). The model employs the excellent characteristic of SVM which has high speed of solving and could describe nonlinear relation as well as the characteristic of PSO which has global optimization. Through test of engineering samples, the research result showed that this model has fast astringency and high precision, providing a new method and approach for the fast and accurate evaluation of the well cementing quality.
Discussion on Excavation Monitoring Schemes Based on Image Processing
Authors: Sun Mao Heng , Jiang Wei , Hu Chen Hao , Feng Tian Tian
Published: August 2011

This study breaks through traditional displacement and inclination monitoring methods in excavation engineering, and proposes for the first time that combining excavation engineering with subjects such as Iconology, Signal Processing and Wireless Sensor Network, use Digital Signal Processing, Digital Image Processing, and Micro-Displacement Sensing technology for monitoring and processing various types of displacement. Then collect all monitoring points’ information through Internet of Things technology into database processing platform for processing, in order to achieve automatic real-time monitoring.
Calibration Method for Structured Light Vision Sensor Based on Planar Target
Authors: Liu Zhen Qian , Wang Shun , Zhang Yi Xin
Published: August 2011

The calibration of structured light vision sensor is the key technique in structured light 3D vision measurement. In this paper, a novel method for structured light vision sensor calibration is presented. In our method, a simple 2D planar target is used, and the corresponding world coordinate system is set for the target at different positions as well as the transformation relationships between world coordinate system camera coordinate system and image coordinate system. The intersecting line equations at different positions are unified under the camera coordinate system after processing. Then we can use least square method to fit the structured light equation. The experimental results show that the proposed method is an efficient method with high precision and simple procedure.
Research on Dynamic Balance Control Mode in Variable Flow Rate HVAC Systems
Authors: Guo Jian Xiang , Sun Jin Fei , Qiang Jia Wen
Published: August 2011

With the analysis of the cause and solutions of hydraulic maladjustment in the variable flow rate HVAC systems, two control mode of the terminal constant pressure difference system and the electric adjustable dynamic balancing valve system are studied, include the comparison of their energy consumption under variable flow rate condition , and the research of their flow characteristic curve in variable flow rate control systems.
Agent Coalition in the Realization of Genetic Algorithms
Authors: Hu Juan , Tu Li , Yan Quan Feng
Published: August 2011

Coalition formation of the Multi-Agent System is a key issue, mainly focuses on how Multi-Agent System dynamically generate optimal task-oriented Agent Coalition. This article will discusses the formation of Agent coalition applying genetic algorithm to the formation of Agent coalition, Experimental results show that the genetic algorithm can quickly and efficiently identify Agent coalition. Furthermore the performance and convergence rate are better than correlation algorithm.
Employee Management System of Graduates Based on SOA
Authors: Tu Jin Wei
Published: August 2011

The paper analyzes the development status of colleges, the actual problems the graduates meet in the course employment, and the design goals and principles of employee management system. SOA employee management system was designed which based on the above conditions. The system maximizes the information shared with other systems through the implementation of the SOA system. And the system manages the information of graduates efficiently through the internet information platform of local management information system.
Policy Research of Network Security about Employment Management System in Colleges and Universities
Authors: Luo Lin
Published: August 2011

The college education has developed unceasing and the number of collegian is step up with more extrude contradiction of student employment. The tough job market requires the vocational counsel and management should be more scientific, standard and effective. At present, the applied employment management system for the graduates has the characteristics of high-efficiency, convenient with speediness that played an important role in high-efficiency employment of graduates. However, there has hidden danger of high-efficiency network security. The employment management and amount of relevant personal information might affect seriously for the network security questions. Therefore, research the network security of information management system about college employment is very important.
Research for Urban Value Based on Grey Correlative Analysis
Authors: Wang Hong Tao
Published: August 2011

The urban value is the sum total of the entire human labor which is formed by the accumulating investment as well as the construction activities in the urban city. The urban value is one of the most significant elements in the composition of the real estate value. Urban value determines the value of real estate. Similarity, the value of real estate also has effects on urban value. In accordance with the empirical research, it indicates that the general complexity and dynamics of urban value conform to the using space of Grey Correlative Analysis. To make the analysis of urban value based on Grey Correlative Analysis can explain the differences of the real development trend between each city. According to Grey Correlative Analysis, the main factors that affect urban value are urban economy value, urban position value and urban resources value in turn. Effects on urban value of urban infrastructure and urban scope value are weak. Research for urban value based on the Grey Correlative Analysis provides the more rational and logical decision-making platform to the most acceptable subsystem in the urban economic activities objectively--the activities for the investment and construction of the urban real estate.
Using Modified Sandia Method in Developing Typical Solar Radiation Year for Photovoltaic Electricity Generation Projection
Authors: Huang Kuo Tsang , Ou Wen Sheng
Published: August 2011

The energy generation efficiency of Building Intergraded Photovoltaic Systems (BIPV) system relies much on the panel’s surface solar radiation received. In the projection of annual power generation of photovoltaic panels, local global solar radiation plays a pivotal role for reliable estimation process. The purpose of this paper is to develop an hourly typical solar radiation year (TSRY) as fundamental meteorological database for utilizing the estimation process. The TSRY should be interpretable to local long-term climate variations, thus, ten years' hourly meteorological data were gathered to formulate a typical year by means of modified Sandia method herein. A total of four cities' hourly typical years from northern to southern Taiwan were established in this paper. Orientation and inclination effect of the PV panel were also discussed in terms of daily averaged global solar radiation that cumulate from TSRY.
Study of Picking Method for Carya Cathayensis
Authors: Zhang Wei , Yao Wen Bin , Xv Xiao Feng
Published: August 2011

In order to solve the problem of picking carya cathayensis, the paper studies picking methods of the fruit and picking characteristics of carya cathayensis, The vibration method was put forward for carya cathayensis picking. Test results show that picking carya cathayensis with a vibration method is feasible. The main technical parameters of vibration picking for carya cathayensis was proposed，the paper provides a theoretical basis for the mechanized of picking carya cathayensis.
Research and Development of Picking and Processing Technology for Carya Cathayensis
Authors: Zhang Wei , Yao Wen Bin
Published: August 2011

To improve the picking efficiency and processing quality of carya cathayensis, this paper analyzes the present problems in harvesting and processing of the carya cathayensis. The vibration picking method for carya cathayensis was put forward.Aim at process of classification and broking shell of carya cathayensis , the short of technology and key technical problems was pointed out. Finally, future research direction of picking and processing technology for carya cathayensis was put forward.
Analysis of Residual Stresses Distribution Based on the Finite Element Method for Beam-Column Connections of Steel Frames
Authors: Xu Guo Lin , Zhang Wen Sheng , Zhu De Bin , Bai Ya Shuang
Published: August 2011

Beam-column connections of high-rise steel frames are usually welded, studies on seismic damages for nodes show that the existence of welding seam is the main reason which contributes to the brittle failure of nodes. This paper studies on the coming into being process of nodes, the deformation ability can be improved through changing welding order to reduce residual stresses for nodes. In the paper, numerical stimulations for nodes are conducted through finite element software. Distribution and peak value of residual stresses of beam-column connections are compared in accordance with different welding order. The analysis provides a theoretical basis for connection nodes in terms of utilizing their strength and ductility of steel.
Prediction and Analysis of Land-Use and Land-Cover Change in Liaoning Coastal Economic Zone, China
Authors: Liu Wei Ling , Zhang Lin Bo , Zhu Jing Hai
Published: August 2011

Land-use and land-cover change (LUCC) is an important factor of global change. In this study, the LUCC of Liaoning Coastal Economic Zone, the typical area of urbanization in China, was simulated by applying CLUE-S model under the historical trend scenario and policy scenario two scenarios. Transfer matrix and landscape index were also applied to analyze the change of landscape pattern. The results show that, from 1988 to 2007, the area of construction land was considerably increased. However, the area of forest, water and farmland were greatly decreased. The results were mainly caused by the rapid growth of economic, population and accelerated urbanization. These changes have caused landscape fragmentation in this study area. In general, the trends of landscape changes under two scenarios were unsustainable in this area.
Analysis of Energy-Saving Architecture with Self Thermal Insulation Structure of Fiber Reinforced Foamed Concrete
Authors: Ma Li Guo , Song Hong Wei
Published: August 2011

It has economical and social value to build energy-saving architectures. Foamed concrete is commonly used as non-load bearing structure to save energy of buildings. With reinforcement of fiber foamed concrete can be used as load bearing structure to build architectures. The load bearing structure of fiber reinforced foamed has ability of self thermal insulation to get the aim of energy-saving. In the paper the excellence and disadvantage of foamed concrete is summarized. Methods are given to build the energy-saving architecture with self thermal insulation structure of fiber reinforced foamed concrete in new formwork. The building technology will be applied in new countryside construction in China.