bluuebunny/crossref_metadata_2025 huggingface dataset:
Assimilation of Wave Data for Simulations of Typhoon Waves in the South China Sea
Authors: Shi Jian , Tong Chao Feng , Yan Yi Xin
Published: December 2012

A sequential assimilation method is applied to improve the accuracy of wave simulations in the South China Sea. Typhoon Nesat was chosen to be used for the numerical experiment. The assimilation is based on Optimal Interpolation(OI) which can minimize the Root-Mean-Square error in the analysis. Using the method of OI, wave height and mean period data observed by three buoys have been assimilated into the third generation ocean wave model(SWAN). The results show that the assimilation can correct the difference between the wave model and observations, and the result of significant wave height is superior to that of mean period.
The Chronic Toxic Effect of Water-Accommodated Fractions of 0# Diesel Oil on Splox Gene of Sea Urchin
Authors: Yang Bai Lin , Xiong De Qi , Jiang Ling Ling , Meng Gang
Published: December 2012

0# diesel is common petroleum hydrocarbon pollutant of sea and marine organisms. One goal of this study was to assess the chronic toxic effect of water-accommodated fractions（WAFS）of 0# diesel oil on Splox gene of Strongylocentyotus intermedius by PCR-SSCP. The experiment was carried out with three concentrations (5mg/L, 20mg/L and 50mg/l). The results show that with the increase of exposure concentration and time, the mutation probability of the sea urchin increased. In the four primers, single base mutation took place in coding region of the 41 of Primer A-1, with the conversion of A-G, where amino acid changed from lysine into arginine.
Effect of Loading Amplitude on Soil Deformation under Irregular Waves and Fixed-Number Waves
Authors: Meng Fan Chao , Yuan Xiao Ming , Xue Hui
Published: December 2012

Through series of dynamic triaxial tests, the relationships of soil deformations under irregular seismic loading and fixed-number constant amplitude loading are analyzed. The effect of loading amplitudes on the relationships is presented. The results shows: (1) soil deformation under irregular seismic loading obviously differs from that under constant amplitude sinusoidal loading, and the strain history is mainly controlled by the performance of ground motion; (2) if 20 cycles of constant amplitude loading is employed instead of irregular seismic loading to correct residual deformation under real seismic loading, loading amplitudes have no effect on soil deformation under irregular waves and fix-number waves.
Finite Element Analysis of Wire Mesh Frame Wallboard under Seismic Action
Authors: Ji Hua
Published: December 2012

According to the force condition of wire mesh frame wallboard under seismic action, finite element program is used to conduct the deformation simulation analysis of 12 test pieces under different working conditions, obtaining the influencing factors that affect the deformation of wire mesh frame wallboard under vertical seismic action, which offers theoretical foundation for the design of wire mesh frame wallboard.
The Seismic Response Analysis Method of the Jacket under Multiple Support Excitation
Authors: Sun Jian Mei , Cui Hao
Published: December 2012

With the development of demand of exploiting offshore oil reserves, the Jacket platform structure’ span and depth is more and more large, so the seismic analysis of the jacket structure will become more and more complicated. In the dynamic analysis of long-span structures, multiple support excitation may be accounted is necessary. For big jacket structure, it is more accurate and reasonable by multiple support excitation than by uniform excitation. The objective of the research described herein is to develop a simplified method to investigate the effect of multiple support excitation on the jacket structure.
Experimental Research on the Influence of the Pile Type and Stirrup on the Seismic Performance of PHC Piles
Authors: Wang Tie Cheng , Gao An , Zhao Hai Long
Published: December 2012

The influence of the pile type and the stirrup on the seismic performance was evaluated based on the results of reversed cyclic loading tests on the four prestressed high strength concrete (PHC) piles. It is indicated that the AB-type pile has the better seismic performance than the A-type pile from the results. The bearing capacity does not increase obviously with decreasing of the stirrup spacing and increasing of the stirrup diameter. The degradation of stiffness does not decrease significantly with decreasing of the stirrup spacing and increasing of the stirrup diameter. The energy dissipation capacity is improved with increasing of the stirrup diameter and decreasing of the stirrup spacing.
Empirical Mode Decomposition Application for Structural Seismic Responses
Authors: Du Ri Dong , Yuan Yong Bo , Chen Miao
Published: December 2012

Large mass method is used to calculate structural seismic responses of long-span bridges. Due to the inherent characteristics of large mass method, the larger scale of long span bridge, different geological conditions, seismic input time delay of different foot stall, the displacement curve of seismic responses will be drifted and distorted from the normal. In this paper, Empirical Mode Decomposition（EMD) based on the large mass method is proposed to remove pseudo component and drift displacement. Then displacement response curve is reconstructed using the remaining components, the drift and distortion of structural seismic responses is successfully removed by this method.
Brief Comments on “Unloading Rock Mechanics” and Engineering Applications
Authors: Zhao Bao Yun , Zhu Ke Shan
Published: December 2012

Since rock masses are not a true continuous, homogeneous, isotropic and linear-elastic (CHILE) continuum, the loading and unloading behaviors differ greatly from each other. Professor Ha Qiulin and his co-workers have demonstrated that strength and deformational characteristics, initial rock stresses, scale effects, creep, deformation and fracture patterns are quite different and stress path dependence is particularly emphasized. As engineering unloading of the rock mass is essentially of a dynamic nature by excavation, we will first discuss the excavation process and related stabilization techniques. For the complex stress and deformation conditions around the excavated boundaries, it seems rational to define an excavation disturbed zone (EDZ) as in the last decades. In tunnel excavation, temperature and ventilation effects should be also taken into account. Space-and-time dependence on tunnel behaviors is important. Finally, further research topics are discussed.
Seismic Response of Bridge Isolated with Friction Pendulum Systems
Authors: Wang Chang Feng , Zhu Chun Lin
Published: December 2012

Friction pendulum systems are sliding bearing that make use of a spherical concave surface to provide a restoring force and friction force to dissipate earthquakes energy. Seismic response reduction effect of some tall pier and long span simply-supported steel truss girders with FPS is researched by using nonlinear time history analysis method. The results show that seismic response reduction effect is evident for the moment at the bottom of pier and displacement at the top of pier for the tall pier and long span simply-supported steel truss girders.
Numerical Simulation of Shaking Table Test of Tianjin Transportation Junction
Authors: Jiang Xin Liang , Wu Xin Liu
Published: December 2012

A shaking table test of large-scale pile-soil-complex structure interaction is accomplished on the transport hub of Tianjin station, and some reliable testing data of soil-structure dynamic interaction laws are acquired. ANSYS is used to simulate the process of the test, including establishment of 3D FEM model, selections of material parameters and constitutive, treatment of boundary conditions. Comparative analysis is performed between simulation data and testing data. The results show that: the simulative results agree well with the experimental ones under small earthquake, but the deviation increases when it suffers medium earthquake. The rationality of the numerical simulation and test are verified by each other, and the causes of the deviation under medium earthquake are analyzed.
Research on Seismic Behavior of Infilled Frame Structure
Authors: Ren Wen Jie , Ma Zhi Cheng , Wang Zhi Qiang
Published: December 2012

The infilled frame structure is a kind of structural system used widely in the industrial and civil building. Although the infill walls are no-load-bearing components, the walls are also subjected to some earthquake actions. During some domestic and foreign large earthquakes in recent years, the infill wall were destroyed seriously and the frame were destroyed lightly. The damage of the infill wall not only influences the application of the building, but also increases repair costs for restoring the building, seriously, even endangers the life safety. This paper analyzes the influence of the connection method between the infill wall and the frame on the seismic behaviors of the infilled frame structure. Finally, some new technologies to protect the infill wall and the frame from damage under earthquake are introduced.
Finite Fault Modelling for the Wenchuan Earthquake Using Hybrid Slip Model with Truncated Normal Distributed Source Parameters
Authors: Sun Xiao Dan , Tao Xia Xin , Liu Cheng Qing
Published: December 2012

An hybrid slip model combining asperity model and k square model was outlined. In the model, both the global and local source parameters follow a trancated normal distribution. The hybrid slip model was then applied to generate finite fault models for the great Wenchuan earthquake, where the fault plane was assumed to have two segments, a reverse segment on the southwestern of the fault and a right-lateral strike-slip segment on the northeastern of the fault. The location of the asperities on each segment was determined considering the results from inversion and field investigation. 30 different finite fault models were obtained, and the one which generates the ground motion best fitting the average spectrum was picked out using spectral deviation evaluation. Finally, ground motion at six near field stations were simualted based on the best-fit fault model and compared to the records.
Seismic Behavior of Severe Damaged GFRP Tubed RC Bridge Piers Repaired with CFRP
Authors: Wang Xuan , Wang Ce
Published: December 2012

In order to investigate the seismic behavior of earthquake-damaged glass fiber reinforced polymer (GFRP) tubed reinforced concrete(RC) bridge piers repaired with wrapped carbon fiber reinforced polymer (CFRP) sheets. An experimental study, in which four GFRP tubed RC bridge piers repaired with wrapped CFRP sheets were tested under constant axial load and cyclic lateral displacement excursions that simulated seismic force,are presented in this study. Researches show that repaired with CFRP not only increase bridge piers’ultimate strength but also improve the performance such as ductility.
A Novel Seismic Base Isolation System Consisting of a Lead Rubber Bearing in Series with a Friction Slider. Part II: Application to a Multi-Storey RC Building and Comparison with Traditional Systems
Authors: Cancellara Donato , de Angelis Fabio , Pasquino Mario
Published: December 2012

In a parallel paper a new High Damping Hybrid Seismic Isolator (HDHSI) has been proposed and obtained by the assembly in series of a Lead Rubber Bearing (LRB) and a Friction Slider (FS) characterized by a high friction coefficient. In the present paper, within the context of seismic base isolation techniques for the earthquake resistance of Reinforced Concrete (RC) buildings, a multi-storey RC building is analyzed as base isolated by the seismic isolator HDHSI (High Damping Hybrid Seismic Isolator). The seismic response of this base isolated RC building is compared with the seismic response of the same structure isolated by a LRB (Lead Rubber Bearing) isolator. The analysis is developed by considering different seismic events in terms of intensity and in terms of frequency content with regard to a supervening collapse. The purpose of this comparative analysis is to highlight the features offered by the HDHSI system compared to the LRB system in the seismic protection of structures. Accordingly, a nonlinear dynamic analysis is performed for a RC structure base isolated by means of the proposed device. In the analysis anomalous seismic events are considered. They are the El Centro earthquake (N00W component, 1940) which is characterized by high intensity and the Erzincan earthquake (N90W component, 1992) which is characterized by anomalous frequency content. The comparison between the two base isolation systems is presented by analyzing the time history of the shear force and the time history of the displacement at the base of the superstructure. The benefits of the HDHSI system in conferring protection to the structure are shown to be significant even under extreme seismic events.
Research on Deviation Correction and Modeling of Geological Drilling
Authors: Li Hao , Wu Ming Fei , Wang Ya Qin , Yang Biao
Published: December 2012

For three-dimensional geological modeling by TP model, the problem of deviation in the original drilling data must be resolved. In this paper, the original logging data of drilling is utilized to study the spatial relationship between the geological bodies constructed by equivalent vertical and real drilling respectively, and a correction method on deviated drilling is therefore proposed. The result shows the method can effectively conduct the lossless correction of deviated drilling under various drilling and stratum conditions, thus providing reliable logging data of drilling without deviation for the construction of TP models.
Seismic Response of Steel Buildings with Different Structural Typology
Authors: Valente Marco
Published: December 2012

This study investigates the influence of the in-plan structural layout on the seismic response of symmetric and asymmetric steel structures. A five-storey steel frame building was used as reference structure and two different structural systems were employed to represent torsional stiff and torsional flexible structures. Accurate numerical models of the different typologies of structures were developed and both nonlinear static and dynamic analyses under bi-directional ground motion were carried out. The influence of axial force-bending moment interaction in columns in the two main directions and second order effects were taken into account in the numerical analyses. The results of the numerical investigations on symmetric structures showed that the reduction of the number of moment resisting connections may lead to an increase of the structural damage. Asymmetric variants of the investigated structures were created by assuming different mass eccentricities in each of the two main directions and extensive parametric studies were performed. For the torsionally flexible building, the influence of ground motion intensity was very strong. A transition from torsionally flexible to torsionally stiff behaviour in the weaker direction of the initially torsionally flexible structure was observed for severe seismic actions. The change of the stiffness of the structure in one direction due to high levels of plastic deformations affected the structural response in the orthogonal direction. Torsional effects decreased in case of severe seismic excitations and high levels of plastic deformations. The reduction of torsional effects observed for low seismic actions on the stiff side of torsionally stiff buildings disappeared under strong seismic excitations.
Design and Realization of Urban Components Collecting System
Authors: Kang Xiao Feng , Wu Wei Ying
Published: December 2012

Digital urban management system is an important part of digital city construction and urban components collecting system is base of digital urban management system. This paper proposes a scheme of urban collecting system mainly with collecting urban components information by car-borne road information system and supplementing with RTK survey.
Research on Quality Control of DOM with Airborne SAR Image
Authors: Yue Xi Juan
Published: December 2012

It is cloudy and rainy perennially in many regions of China, and optical images are extremely difficult to be obtained. Synthetic aperture radar (SAR) is as a new way to provide mapping data in such areas because of the advantage of all-weather and all-time. Digital Orthophoto Map(DOM) can be generated using Airborne SAR images that has become an important means in mapping difficult areas. In this paper, DOM production process is given based on airborne InSAR data, the factors that affect airborne SAR DOM accuracy are analysed, and the quality evaluation criteria of airborne SAR DOM is introduced. There are some main technical problems such as shadow, layover, Edge Snap and cutting alignment in the DOM production process, and the solution of the problems is presented in this paper.
Industrial Ultrasonic Imaging Based on Compressed Sensing
Authors: Dai Guang Zhi , Lin Wei Yi , Han Guo Qiang
Published: December 2012

Industrial ultrasonic imaging system based on compressed sensing(IUICS),is still lack of available implementation, due to its difficulty in hardware realization.However,thanks to the recent finite rate of innovation and ultrasonic phased array technology,it is possible to apply Compressive Sensing framework to industrial ultrasonic imaging system.In this paper,we propose an available scheme of industrial ultrasonic imaging,which includes the sampling of signal,reconstruction algorithm and its physical structure, based on Compressed Sensing.
The Design and Realization of Digital Urban Management System
Authors: Wu Wei Ying , Kang Xiao Feng
Published: December 2012

This paper analyzes technical features of digital urban management system, and constructs its general structure. This system adopts ten thousand meters unit gird management, and the combination of urban events with urban facilities components, so as to reconstruct the urban management process. At last this design has proved its availability by a practical example.
A New Method for Measuring the Length of ITZ on Concrete Section by Digital Image Processing Technique
Authors: Chen Zheng , Yang Lu Feng , Xu Fei , Feng Qing Ge
Published: December 2012

The accurate analysis of the length of the interfacial transition zone (ITZ) between aggregates and the hardened bulk cement paste is of great importance to the definition of the effective diffusion field in concrete. A new method for measuring the length of ITZ on concrete section by digital image processing technique is proposed in this paper. Compared with the traditional method, the ITZ on concrete section can be discriminated and the length of ITZ can be measured by the method presented rapidly and accurately, and the method can be used in various section forms of concrete specimens.
Study on Binary-Medium Model of Fissured Loess
Authors: Yan Fu Rong , Fan Wen , He Ting Yin
Published: December 2012

On the basis of the theoretical framework of breakage mechanics for geo-material ,the fissured loess can be regarded as a composite material consisting of bonded blocks and weakened bands，therefore a fissured loess binary-medium model is formulated. Then the model will be applied to the study of fissured loess. By the numerical calculation, the relationship of stress-strain can be obtained. A comparative analysis between calculation and triaxial test has been done. The results show that there is a good adaptability to apply the binary medium model to fissured loess.
Study on the Wet-Dry Classification of Annual Runoff in Biliuhe Reservoir
Authors: Liu Dan , Wang Ben De
Published: December 2012

The reasonable wet-dry classification of annual runoff has the guiding significance for the rational development and utilization of water resources. The conventional method and the set-pair analysis (SPA) method have been adopted in this paper to classify the abundant state and the low state of the annual runoff in Biliuhe reservoir from 1951 to 2005. The results show that the conventional method only stresses the size of annual runoff, which does not consider the schedule distribution; therefore, the wet-dry classification results are unilateral. However, the SPA method comprehensively emphasizes the two factors and the classification results can better reflect the actual wet-dry situation of annual runoff.
Flow of High Prandtl Number Fluid under Varying Axial Magnetic Field
Authors: Liang Ru Quan , Yang Shuo , Ji Jun Hong , He Ji Cheng
Published: December 2012

From engineering actual conditions of single crystal grown by floating zone method, Navier-Stokes equations coupled with the energy conservation equation were solved on a staggered grid based on the half floating area physical model. The two-phase surface was captured by using the mass conserving level set method. The internal flow structure of flow field of high Pr number liquid bridge was studied under uniform magnetic field environment in microgravity, which is important to optimize the process of the crystal growth.
Reference Evapotranspiration Models
Authors: Salahou Mohamed Khaled , Murava Raphinos Tackmore , Zhang Xiu Ju
Published: December 2012

This paper will examine the concept of evapotranspiration (ET) in more detail and provide more details into the concept of reference evapotranspiration (ETo) and of the measurement and estimation of ETo. Studies of ET models usually involve the comparison of a single model in different climates, different model types in the same location, or model output to either lysimeteric measurements or a local evaporation pan. This paper will examine the performance of ET models versus ET measured using lysimetery or pan evaporation and the performance of ET models when compared to a standard ETo model. A review of the performance of pan evaporation to the standard ETo model will also be performed.
An Approximation of the Improved Rouse Equation
Authors: Cheng Chen , Song Zhi Yao , Wang Yi Gang , Zhang Jin Shan
Published: December 2012

Rouse equation, which was derived from the diffusion theory, is well known in the study of steady state suspended sediment transport over erodible beds. Although this equation being regarded as Rouse law could be applied effectively, it is unrealistic that the concentration at the free surface is always zero. In addition, for deriving the depth-averaged concentration, the numerical integration or the table lookup has to be performed. Bose and Dey[1] improved the Rouse equation using a modified sediment diffusivity in order to overcome the zero value concentration, but this equation can not be integrated analytically yet. In this paper, according to two equilibrium profiles respect to constant and linear diffusion coefficients, an approximate solution of the improved Rouse equation is given using a general weight-averaged method in order to be integrated analytically. Through verification with experimental data, the results show that the approximation of the improved Rouse equation behave generally better than itself, as well as the Rouse equation and van Rijn equation over the whole water depth. It is revealed that, nevertheless some empirical, this approximation is reasonable, and has higher accuracy. Moreover it can be integrated analytically.
Application of EFDC to Density Stratified Flow
Authors: Zhang Bing , Lv Jing , Huo Peng , Zhang Shao Xiong
Published: December 2012

Environmental Fluid Dynamics Code (EFDC) was developed by Hamrick at Virginia Institute of Marine Science for estuarine and coastal applications. EFDC is a general-purpose modeling package for simulating three-dimensional flow, transport, and biogeochemical processes in surface water systems such as rivers, lakes, reservoirs, estuaries, wetlands and coastal regions. Use the 3-D numerical model EFDC simulated the density stratified flow in a slut. Compared the simulation and experimental data, the results showed that EFDC could accurately simulated the density stratified flow.
The Model Research for Optimal Water Allocation of Irrigation Canal System
Authors: Liu Ying
Published: December 2012

The present study make a deep analysis of the Chang TAN, Wu Yin, Tongshan Yuan,Wen Rui,Niu Tou mountain , Qian Tang River six large scale irrigation management status and conventional water distribution operation mode. We refer a promising method of optimal water allocation of irrigation canal system based on the former research.
Study on Three-Dimensional Visual Simulation for Inter-Basin Water Transfer Project
Authors: Wang Qian Wei , Sun Rui Rui , Guo Wei Ping
Published: December 2012

With regards to the characteristics of inter-basin water transfer projects, a 3d visual simulation (Three-Dimensional Visual Simulation, 3DVS) method for inter-basin water transfer project was proposed. A virtual reproduction of the entire project and its topography is achieved. The supplement of the three-dimensional topographic data was completed by Civil 3D combinedwith Google Earth. In this paper, the 3D digital model of inter-basin water transfer project is established using 3ds Max. Based on the established digital model, the simulation of channel water were realized .The Yuzhou section of South-to-North Water Transfer Project is taken as a case study. 3D visual simulation provides an effective way for the construction management and decision-making for inter-basin water diversion project.
Experiment of Settling Effect of Ecuador's Coca Codo Sinclair Hydropower Station Settling Basin
Authors: Wu Cai Ping , Chen Jun Jie , Wu Guo Ying , Zhu Chao
Published: December 2012

We designed and constructed a model of Ecuador's Coca Codo Sinclair Hydropower Station, observed its intake discharge, flow pattern, flow velocity distribution and desilting effect and the desilting effect of the desilting facilities. Through model experiment and comparison among a variety of body types based on the experiment result of the original design scheme, we recommended a modified body type that is favourable for the settling basin to desilt.
Failure Surface and Plastic Potential in Deviatoric Plane of Bangkok Clay
Authors: Ratananikom Wanwarang , Yimsiri Siam , Fukuda Fumihiko , Likitlersuang Suched
Published: December 2012

This paper presents an experimental investigation on the failure surface and plastic potential in deviatoric plane of Bangkok Clay. The results of torsional shear hollow cylinder and triaxial tests with various principal stress directions and magnitudes of intermediate principal stress on undisturbed Bangkok Clay specimens are presented. The obtained stress-strain behaviors assert clear evidences of anisotropic characteristics of Bangkok Clay. Both failure surface and plastic potential in deviatoric plane of Bangkok Clay are demonstrated as isotropic and of circular shape (Drucker-Prager type) which implies an associated flow rule. Concerning the behavior of Bangkok Clay found from this study, the discussions on the effects of employed constitutive modeling approach on the resulting numerical analysis are made.
Hydrodynamic Performance Analysis of Hubless Rim-Driven Propulsors
Authors: Zhang Shuai , Zhu Xi , Zhou Zhen Long
Published: December 2012

Due to no design guidelines available for the hubless propeller，based on the relative inflow velocities together with blade root strength considerations, the Ka –series propeller’s blade geometry was re-designed with an inversion of the thickness distribution of the sections. Accordingly，the blade geometry model for hubless rim-driven propulsors was designed，then three types of hubless rim-driven propulsors’ models were established and calculated numerically. The results show that thrust coefficients and torque coefficients for hubless rim-driven propulsors are similar to the ducted Propeller’s. Due to no hub, with the new thruster the hub-vortex is avoided and the cavitation minimized.
Benefit Assessment of Cut-off Wall Implementation in Daping Groundwater Reservoir
Authors: Chang Te Hsing , Tung Ning Chien , Chang Fu Ming
Published: December 2012

Groundwater reservoirs aim at saving grounding water from aquifers by means of interception and adjustment. This study adopts numerical model simulation to evaluate the benefit of developing subsurface reservoirs and provides the case of the groundwater reservoir development at Daping region in Dongju Island. Since 2008, this study has been conducting surface geological surveys, geological drilling, surface infiltration experiments, physical experiments on bore specimens, and continuous observation of groundwater level while simultaneously conducting water pumping and slug tests in the field in order to estimate the hydro geological parameters of the site. The development benefit assessment of the groundwater reservoir will also include catchment area, surface land use, calendar year rainfall records and other information. Meanwhile, the FEMWATER numerical model of groundwater will be used to conduct hydrodynamic simulations of the development area. According to the simulation results of pre and post construction of the cut-off wall of the groundwater reservoir, this study could estimate the stable pre and post water volume and the development benefit of the groundwater reservoir can be assessed. According the 3-year unsteady numerical simulation, the results show that the groundwater reservoir can provide approximately 36 m3/day of stable water supply during dry seasons. If a cut-off wall is implemented and the stable water supply could increase 11% to 40 m3/day and raise the average upstream groundwater level of the cut-off wall by 1m, it clearly displays the benefit of the cut-off wall.
Research Progress of Shallow Salt Groundwater in Inland Region
Authors: Wang Li Yan , Xing Li Ting , Zhang Yong , Zhang Feng Juan , Sun Bei Bei
Published: December 2012

The paper analyzes the research status of shallow salt groundwater at home and abroad and summarizes the research results. It studies on hydrogeochemistry action and variation of hydrogeology parameters which aparts are weak link, and then describes evolution and formation of salt water. In accordance with the principle of environment sustainability, to exploit and utilize water resources reasonably as well as completely improve salt water are mainly emphasis. Future research direction on shallow salt groundwater inland is proposed to urge the research effort to develop to new depth and width.
Simulation of a Free Surface Flow over a Vertical Weir
Authors: Liu Y. L. , Bai Y.
Published: December 2012

In this paper the numerical simulation of a free surface flow over a vertical weir with in turns of a scour pool and a small hump weir is presented. Since in this case few of calculative examples adds scour pool and small hump weir in the model, it is meaningful to compute this example using a numerical software which is named Fluent 6.3. The numerical method used consists of Navier–Stokes turbulence solver and k-ε model together with a VOF method and PISO algorithm in pave meshes. Thus, the sketches of flow fields on each typical time point and velocity distributions on each section on 16s are provided to describe flow field accurately. A very good quantitative consequence which accords with hydraulics theoretical analysis has been obtained.
Influence of Temperature and Humidity Control in Air Conditioning on Indoor Environment Quality and Human Feelings
Authors: Sun Yu Ping , Zhu Neng
Published: December 2012

In this study, the oxygen contents of the indoor air quality in different climatic conditions in a chamber were real-time monitored. At the same time, ten young volunteers sit in the three different environment conditions to fill subject feeling questionnaires. The climatic conditions referred to three groups of hot and humid environment (30°C, 35°C, 40°Cdry bulb temperature and 90% relative humidity). The results reveal the oxygen content of indoor air quality slightly decreased in different thermal environments, the values within normal variations. Questionnaire statistic results indicate that the temperature and humidity control in air conditioning significantly influence the human feelings. Thirsty, head heavy, tired, irritability, distraction, chest tightness and cold sweating are the main emerging symptoms in such indoor environments. Reasonable control of indoor temperature and humidity has vital importance to indoor environment quality.
Application of Geophysical Technology in Prevention of Mining Geological Disasters
Authors: Su Zhong Jie , Wang Jing , Wang Lin
Published: December 2012

The prevention of geological disasters in the coal mine, integrated geophysical technology was used to avoid geological disasters in coal mine, build a harmonious society and improve economic efficiency is of great significance. In this paper the development of geophysical technology was analyzed, the correct use of geophysical technology and geological disaster prevention are described, It briefly introduced seismic exploration, electrical geophysical technology such as the basic concepts and exploration results and looked forward to the prospect of integrated geophysical technology .By exploration cases it described geophysical exploration methods in the prevention of geological disasters in the coal mine practicality and effectiveness.
Seismic Response Analysis on the External Walls of the LNG Storage Tank for Spill Conditions in Different Liquid Height
Authors: Zhang Yun Feng , Zhou Xin Yu , Zhang Zhao
Published: December 2012

As an important equipment in the gas receiving station, LNG storage tanks is an imprortant department to guarantee the gas providing for the significant gas sectors as well as their facilities safe operation, who has the role that cannot be replaced ,LNG in the tank is flammable and explosive medium,once the tank damaged, a large number of flammable low temperature liquid will leak, nevitably have influence on the structure of prestressed concrete performance and seismic response of the rigid wall, and destructive secondary disasters may be happened. So reseaching the heat transfer of LNG outside wall during leaking and the seismic response is very necessary. This paper takes a 50000m3 overground LNG tank as the research object, using fluent software to simulate the temperature field and using ADINA to research the seismic response of outer wall, analyzes the the change rule of temperature along the thickness and height during LNG leakage, and seismic response of outer wall when leakage happened at different height, the results can provide theoretical basis for the security calculated during LNG tanks leakage.
Numerical Simulation on Rivulets around Stay Cable Subject to Wind
Authors: Bi Ji Hong , Wang Jian , Lu Peng , Bao Chun
Published: December 2012

Rain-wind induced vibration (RWIV) is a large amplitude and low frequency vibration of stay cables under wind and rain. The formation and oscillation of rivulets on stay cable surface plays an important role in RWIV, and it is also the symbolic characteristics of RWIV. In this paper, a numerical simulation approach of the formation process of rivulets around stay cable is presented by combining gas-liquid two-phase theory and volume of fluid method (VOF method) for the first time. The effect of gravity and air flow on morphology of rivulets is analysed by numerical simulation using computational fluid dynamics (CFD) software-CFX. The veracity and rationality of this approach is verifed by comparing with existing experimental data.
Development of Thermal Resistance Elements for Thermal Analysis of Composite Structural Members in Fires
Authors: Liu Yong Jun , Yan Yu Min , Yao Li Hong , Wang Xue
Published: December 2012

Building fires, which may cause failure of buildings, occur frequently in cities all over the world. Composite structural members, such as concrete filled steel tube columns and steel-decked composite floor slabs, are being increasingly used in buildings for their dual advantage of excellent load bearing capacity and fire resistance. Because the heat transfer across a steel-concrete interface is difficult to model using ordinary elements, most existing finite element analysis models ignore the effect of thermal contact resistance. In this paper, several two- and three-dimensional new thermal resistance elements (referred as TRE for brevity), which have been embed in the special purpose finite element software TFIELD coded by authors, are proposed. Two numerical examples are given. Numerical simulating results demonstrate that the proposed thermal resistance elements are extremely effective.
Analysis for the Effect of Wind Barrier on Reducing Wind Velocity across a Bridge
Authors: Bi Ji Hong , Lu Peng , Wang Jian , Bao Chun
Published: December 2012

A bridge, which is located in the route of typhoon, is considered how to assure normal traffic use against strong winds. As one of the measures, wind barrier is proposed to be set on both sides of the bridge section for reducing wind velocity across it. In this study, an analysis by using CFX, a computational fluid dynamics program, is carried out to investigate the effects of wind barrier. The speed of wind is assumed as 60m/s. To find out an efficient design of the boards, different porosity ratios(r) of the boards is assumed for comparison. The result shows that wind barrier could reduce the wind speed across the bridge effectively.
Research and Practice of Regional Comprehensive Disaster Prevention and Mitigation Planning: A Case Study in Tanghai County
Authors: Wang Hui Yan , Liu Xiao Jing , Li Jin Sheng , Liu Chun Ping , Jiang Ji Yi
Published: December 2012

Regional comprehensive disaster prevention and mitigation planning is to evaluate the disaster risk and disaster resistance capability of a region based on the investigation and prediction of existed or potential disasters in this region, and after that the planning will construct a comprehensive defense system to avoid or reduce the economic loss of disaster and improve the disaster prevention capability. Tanghai County comprehensive disaster prevention and mitigation planning evaluates disaster resistance of all units of county and disaster mitigation of disaster-prevention projects, and it emphasizes on comprehensive disaster prevention and mitigation planning in key regions. This planning will improve the disaster prevention capability of local government, reduces disaster risk and ensures the sustainable development of economic and environment for that county.
Study on the Thermal Cracking Processes of Composite Subjected to Thermal Loading
Authors: Tang Shi Bin , Liang Zheng Zhao , Zhang Ya Fang
Published: December 2012

A numerical method RFPA-T (Thermal Induced Rock Failure Process Analysis) code is used to study the thermal cracking processes of quasi-brittle materials subjected to high or low temperature. The numerical results indicate that thermal stress concentrating along the interface between the matrix and the embedded grains due to their different coefficient of thermal expansion (CTE). The modeling results indicate that θ-crack is generated during temperature increment as the CTE of the embedded grain is smaller than that of the matrix. However, radial-cracks emerged when the temperature decrease. The results obtained from RFPA-T code show a good agreement with experimental evidence of crack patterns caused by thermal expansion mismatch.
Association Rules Mining over Data Streams: Review
Authors: Tan Jun
Published: December 2012

Data streams are continuous, unbounded and coming with high speed which put forward a strong challenge against traditional association rules mining algorithms. In this paper, we give a comprehensive summary on association rules mining algorithm from three side including single-pass scanning algorithm, data processing model, memory optimization. At last, we discuss the main problems and future research directions.
WCS: The Adaptive Wireless Communication Strategy for Mobile Electronic Commerce
Authors: Liu Meng Fei
Published: December 2012

Mobile e-business, with a full use of its mobility, makes information exchange and commercial transaction anytime anywhere become possible. But in the transmission technology and terminal handling ability, there is a huge gap to the traditional e-commerce. According to the existing wireless network communication technology, this paper introduces a new communication control algorithm to the mobile e-commerce transmission control. This algorithm can adjust data sending time according to the user’s needs and the constant change in the wireless communication and channels status. In this way, it can reduce the number of redundant data and network energy consumption, and makes the fusion between network and technique under the time requirements become possible.
The Research of Chinese Website Brand Value Evaluation System
Authors: Wei Jie Yu , Sun Qi Ming
Published: December 2012

Brand is a special, highly integrated value of the assets. It is also that companies dominate the market, a magic weapon to win in the competition. This paper starts from the analysis of the characteristics and limitations of the current brand valuation methods, analyzing the problems and the reasons of the website brand valuation, and making a description of the website brand value evaluation system. Finally this article puts forward the choice of strategy assessment methods.
Path Planning for Mobile Robot with Clonal Selection Algorithm
Authors: Li Yi , Song Zhen Hui , Zhao Li
Published: December 2012

Aiming at the problem of path planning for a mobile robot, an oriented clonal selection algorithm is proposed. Firstly, the static environment was expressed by a map with nodes and links. Secondly, the locations of target and obstacles were defined. Thirdly, an oriented mutation operator was used to accelerate the evolutionary progress. In this way, we can find an optimal solution with proposed oriented clonal algorithm. Experiment results demonstrate that the algorithm is simple, effective, to solve the problem of robot path planning in a static environment
The Proposal of Ensuring the Protection of Handicapped Inhabitants of Smart House
Authors: Hamernik Peter , Tanuska Pavol
Published: December 2012

Smart houses are currently gaining in the development of smart systems. One of the development areas are smart systems for handicapped people. This article is devoted to handicapped inhabitants of smart house with Alzheimer's disease associated with dementia. It compares the stability of a healthy person with handicapped inhabitant, under which determine the boundary conditions of stability. It describes the proposal of starting protection system before falling backward, and needed response time of active elements.
Experimental Study on Bedding Plane Interfacial Slip
Authors: Dai Shu Hong , Sun Ying , Dong Zi Xian
Published: December 2012

Interfacial slip in rock was studied utilizing digital image correlation method (DICM). Notched rock specimens consisting of a natural interface under three point bending were employed for researching the characters and mechanisms of the interfacial slip. The displacement and strain fields on the surface of specimen were measured accurately by DICM. The experimental results show that the interfacial slip can change the crack extension direction and mode. The results are helpful in researching the mechanism of interfacial slip and practical applications in rock fracture problems.
A New Approach to Teaching Undergraduate Course Vehicle Emissions and their Control
Authors: He Chao , Li Jia Qiang , Wang Yan Yan
Published: December 2012

Vehicle emissions and their control (VEC) is an important course for majors about automobiles, such as vehicle engineering, Automobile Service Engineering and thermal energy and power engineering. In order to meet the development of automobile technology and culture the corresponding talents, the teaching method should be reformed and innovated. In this paper, the difficulties in VEC course teaching were summarized and analyzed, and the countermeasures and suggestions were put forward. The course content was redesigned and the laboratory experiment was re-arranged. The innovation training program of students was put forward. Some pedagogical techniques and evaluation methods for VEC course were proposed.
Analysis of the Mindlin Plate and Identification of the Soil Parameter for Foundation with Gradient Optimizing Method
Authors: Hong Tao , Lu Mei Jun , Zhou Chu Wei , Zhang Jian
Published: December 2012

Analysis of Mindlin plate is completed. And combined with gradient optimizing method, the Gaussian Markov identification analysis of the soil parameter for the foundation is studied and put forward in detail. After the mechanical theory for the plate on the foundation is introduced, the controlling differential equations of the plate on the foundation which is subjected to vertical loads are deduced. And linear algebra controlling equations for the plate are achieved which leads to solve the original differential equations more easily when the corresponding solutions to the plate on the foundation are gained with Fourier transformative theory. The Gaussian Markov error function for the soil parameter on the plate is established and applied with the gradient optimizing method. The identification steps on the Gaussian Markov error function for the soil parameter are listed. The calculation results verify the conclusions that the soil parameter of the foundation can be efficiently inversed by applying the Gaussian Markov theory. When different initial soil parameter is set, the iterative computations can be convergent to the true value of the soil parameter. And this Gaussian Markov method can also be applied for the problem of inversed analysis of parameters for other foundation models.
Comparison of the Factors Improving Construction Productivity between Korean and Chinese Laborers in Korea
Authors: Kim Gwang Hee , Shin Yoon Seok
Published: December 2012

Over last 40 years, productivity improvement has been a critical goal for the successful completion of projects in the construction industry. Recently, in Korea, foreign laborers, particularly Chinese laborers, have substituted domestic laborers. To improve construction productivity, an understanding of the characteristics of Chinese laborers is essential. Therefore, this study identified factors influencing the construction productivity of Korean and Chinese laborers, and compared their importance. Through the questionnaire survey, the importance and the ranking in three categories (economic, social, and psychological factors) were evaluated. This result will be useful for project managers to develop strategies to improve construction productivity.
The Research on Asymmetric Information Measurement in Engineering Bidding Market Based on D-S Theory
Authors: Zou Zu Xu , Deng Yan Bing
Published: December 2012

Engineering bidding transaction market exists extensively asymmetric information. According to the information economics point of view, information asymmetric extremely easily leads to the moral hazard and adverse selection, which will cause project value can't get a real reveal in engineering bidding. Therefore, the project bidding on the trade market for the asymmetric information research has strong theoretical value and practical significance. this paper tries to use the method of evidence theory to have a certain extent measure in engineering bidding market of asymmetric information, in order to enrich the content of the bidding market research field, and provide a decision-making reference for relevant departments.
Analysis on the Disaster Forewarning Management in Construction Industry
Authors: Zhong Xing Run , Tan Xiao
Published: December 2012

Based on the analysis of the type and characteristics of the construction industry disaster, this paper analysis the objects of forewarning management of construction industry disaster, such as unsafe factors of the people, unsafe status of the object, unsafe conditions of the environment and unsafe factors of the management, and also discusses the construction process of forewarning management system of construction industry disaster. Furthermore, this paper studies the contents of forewarning management analysis and pre-control measures in detail. Finally, this paper put forward to establish forewarning management system of construction industry disaster, and adopts scientific methods in order to maximize security.