bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Stability of High Embankment with Strong Weathering Filling under Complicated Stress Conditions
Authors: Liu Sheng Chuan
Published: September 2011

Strength reduction elasto-plastic finite element analysis defines the reduction factor when slope has been destroyed as the slope stability factor of safety, which combines with strength reduction technique, the limit equilibrium theory and the principle of elastic-plastic finite element. Three-dimensional finite element analysis should be used in stability analysis of slope because it can overcome the short advantages of two-dimensional finite element and can simulate the complex topographic and geological conditions. Based on the large-scale triaxial shear test, the modified Duncan-Chang model is established. Based on strength reduction elasto-plastic finite element, stability of high fill embankment was studied with three-dimensional finite element method considering the complex terrain conditions. Study results suggest that plastic strain and displacement mutant of slip surface node can be a sign of slope instability as a whole. At the same time calculation of three-dimensional finite element also does not converge. Therefore, it can be slope instability criterion calculate whether the finite element static analysis converges or not. On the other hand, stability safety factor of high fill embankment under three-dimensional conditions is larger than that of two-dimensional conditions, which shows that boundary conditions of high fill embankment enhance its stability.
Design on Passenger Ground Wheel-Rail Cable Car in Transport System
Authors: Hu Yong Ju , Qiu Xin
Published: September 2011

Cable cars are usually used to transport passengers in difference elevation between one point to another point. Usually, cable cars are suspended on the cable and moves by the mobile cable. In this paper, a new type of ground wheel-rail cable car was designed and the performance of this mechanism was analyzed. The transport system of a passenger ground wheel-rail cable car sets wheel-rail devices and cable car wheels ride on the rail on the ground, which is driven by the mobile cable. This is a new type of passenger organizational form, and there are many advantages of this transportation system, such as safe, reliable, energy-saving , environmental protection and economical benefits.
Safety Analysis of Aircraft Flying through Low Altitude Wind Shear
Authors: Gao Zhen Xing , Gu Hong Bin
Published: September 2011

Low altitude microburst wind shear would do harm to aircrafts’ takeoff and landing. In order to analyze flight safety and advise better escape strategies, a mathematical model was built with high fidelity by a vortex ring based microburst model and a flight dynamics model with wind effects. A human pilot model which can describe characteristics of pilots such as skills, experiences, emotion, etc was embedded into the dynamics model. Since the key parameters of the microburst wind shear model and pilot model were set to be stochastic, the Monte Carlo method was adopted to obtain a numerical approximation of the probability density function of the minimum altitude and the F-factors for flight safety analysis.
Establishment of Engine Condition Monitoring Alarm System Based on Fuzzy Neural Network
Authors: Liu Yu Bing , Liu Yuan Dong , Wang Xiao Dong , Jiang Yong Jia
Published: September 2011

In order to overcome the defect of traditional engine condition monitoring only depending on single parameter, this paper establishes the five-level condition monitoring alert system with fuzzy neural network (FNN) which is good at settling uncertain and complicated problems. Firstly, optimal monitoring parameters are selected from three aspects of ferrography, vibration and performance parameters. With sufficient historical data, limit values of parameters and reliable five-level condition monitoring standards are maintained and established by statistical analysis. Then fuzzy membership functions are applied to transform practical data into fuzzy data. Finally the structure of neural network is designed and trained by sample data. The model is tested with original data and proved to be more effective and reliable to engine condition monitoring.
Tensional Ability of Basalt Fiber Enforced Asphalt Mixture
Authors: Gao Chun Mei , Dong Wei Zhi , Liu Xing Yang , Wang Hao , Zhang Ming Liang
Published: September 2011

Tensional ability of basalt fiber enforced asphalt mixture studied by split tensile test then compare with the normal asphalt mixture. The tensional ability is increasing while increase the basalt fiber percents. The tensional strength increase 3.5%, 7.8%, 3.5% and the failure stiffness modulus increase 15.1%, 40.4%, 11.8% while the added basalt fiber is 0.15%, 0.2%, 0.25%, respectively. The result shows that basalt fiber can enhance the tensional ability of asphalt mixture significantly, and the optimum percents of basalt fiber is 0.2%.
Application Research on Traffic Modal Choice Based on Decision Tree Algorithm
Authors: Peng Zheng Hong , Luan Xin
Published: September 2011

With the rapid development of urbanization in china, the contradiction between transport, environment and population growth is becoming more and more pronounced, which offers higher demands for transport planning. This article mainly describes the application of decision tree learning algorithm in traffic modal choice. First preprocess the sample data, then calculate and analyze the information gain ratio, and finally we will build a decision tree model. The results show that the rules obtained by decision tree method have some practical value in the analysis of traffic modal choice.
An Ensemble Learning Short-Term Traffic Flow Forecasting with Transient Traffic Regimes
Authors: Zhu Jia Song
Published: September 2011

Short-term traffic flow forecasting has a rich and substantive research history. For layered hybrid forecasting approaches, traffic flow series are classified into distinct regimes based on characteristics of different traffic conditions so that regime-specific forecasting models can be trained to adequately and consistently approximate dynamic traffic dynamic behaviors. However, traffic regimes are inherently changing and transient, making it a challenging task to perform regime-specific forecasting. In this paper, an ensemble learning approach is proposed and regime-based forecasting models are developed to address the nonlinearity and non-stationarity of traffic flow data. Case study results demonstrate that the proposed approach can effectively account for transient regimes and produce accurate online short-term traffic forecasts.
The Relationship between Deflection and Maximum Stress Distributed on the Layer Bottom in the Typical Semi-Rigid Bituminous Pavement Structure
Authors: Zhao Zhi Zhong , Li Kui , Zhang Ning
Published: September 2011

This article carries on the test to materials of the roadbed and the pavement in the room, and obtains mechanics computation parameter; Considered the road overload situation, we carries on the modeling computation to the typical semi-rigid bituminous pavement structure through using the finite element software; Carrying on the analysis, we obtains the correlation formula between the road deflection and various structures level maximum stress .it can provide the theory basis and the instruction experience for the highway pavement structure design, the examination and the construction control.
Design and Implement on Intelligent Target Ship for Ship Handling Simulator
Authors: Wang Xing Hua , Yang Shen Hua , Chen Guo Quan
Published: September 2011

Aiming at the fact that target ships of ship handling simulator have not the ability of avoiding other ships according to the COLREG 1972, the paper puts forward to add Personifying Intelligent Decision-making for Vessel Collision Avoidance, for short PIDVCA, and vessel automatic control algorithm into solver procedure of target ship, designed and realized target ships to sail according to the COLREG 1972, which make ship handling simulator more realistic simulate the actual navigation environment at sea. Finally, the paper gives the simulation pictures of 2 and 4 target ships intelligent collision.
Improvement A* Algorithm Based on Dynamic Consistency Assumption
Authors: Zou Liang , Zhang Zi , Zhu Ling Xiang
Published: September 2011

Efficient dynamic shortest path algorithm in static networks plays an important role in ITS. To solve this problem, this paper brings forward the dynamic form of Consistency Assumption and Dynamic A* algorithm (A* algorithm based on dynamic lower bound, DA* algorithm) based on dynamic lower bound. DA* algorithm and the dynamic form of Consistency Assumption are described in detail. It is proved that DA* algorithm can solve one origin node to one destination node shortest paths problem in dynamic networks, if DA* algorithm’s dynamic lower bound satisfies the dynamic form of Consistency Assumption.
Fuzzy Logic Based Traffic Density Control via Ramp Metering
Authors: Liang Xin Rong , Wang Di Qian
Published: September 2011

In this work, we apply fuzzy logic method to address the traffic density control problem in a macroscopic level freeway environment with ramp metering. The second-order traffic flow model is firstly formulated. Then traffic density is selected as the control variable in place of traffic occupancy. Based on the traffic flow model and in conjunction with nonlinear feedback theory, a fuzzy logic based traffic density controller is designed. The ramp metering rate is determined by the fuzzy control according to density tracking error and error variation. Triangle curves are used for the membership functions of the fuzzy variables. The rule base including 56 fuzzy rules is also established. Finally, the fuzzy logic based feedback controller is simulated in Matlab software. Simulation results show that this method has good dynamic and steady-state performance, and can achieve an almost perfect tracking performance.
Research on Speed Limit of Freeway Tunnel Group Based on Artificial Neural Network
Authors: Zhang Sheng Rui , Yan Hui Li , Niu Wen Jing , Cao Rui
Published: September 2011

According to the traffic conditions in the typical freeway tunnel group in China, an artificial neural network model is constructed for the purpose of predicting the operating speed in freeway tunnel group in this paper. In this model, some input variables are selected from four aspects, including time factors, traffic dynamic factors, road conditions and tunnel environment, and the output variable is the operating speed. Then the sensitivity analysis method is selected to study the effects of input variables on output variable. The results show that this algorithm can avoid the difficulty of constructing traffic flow model comparing to the traditional algorithm, and it is suitable to realize online modeling for speed limit of freeway tunnel group. Results of this research are practical and effective, and it may provide a theoretical foundation for speed limit of freeway tunnel group.
New Design of Intelligent Navigational Simulator
Authors: Chen Guo Quan , Yin Yong , Li Li Na , Yang Shen Hua
Published: September 2011

This paper puts forward a new design of intelligent navigational simulator due to the fact that the target ships in the current existing navigational simulator at home and aboard which does not have the capacity to automatically give way to other ships to avoid collision. The Designed navigational simulators in which the both target ships and own ships have the ability of anti-collision which makes a big improve on the current navigational training effectiveness. The new designed simulator ,on one hand, can instruct the trainer to take correct action to avoid collision, on the other hand, the target ships in the training exercise can intelligently navigate according to the seaman ordinary practice or《COLREG 1972》at the current traffic situation which is much closer to the real situation on the sea. On the base of the research of algorithm of automatic anti-collision, the raw system frame and basic principle of the intelligent navigational simulator and some typical experiment and analysis is also given.
Nonlinear Finite Element Research for the Rutting of Asphalt Pavement Base on Shear Stress Analysis
Authors: Dong Yi , Peng Miao Juan , Ma Yong Qi , Feng Wei
Published: September 2011

In this paper, visco-elastic-plasticity theory is employed to establish a nonlinear finite element model of the asphalt mixture pavement. The influence of pavement structure, the ability of rutting resistance of middle layer and traffic load on shear stress distribution for asphalt pavement are discussed. The numerical results show that shear stress analysis can be used to analyze the rutting of asphalt pavement. The asphalt materials of middle layer have a great impact on rutting and shear stress. Modified asphalt is a useful middle layer material to decrease the rutting, and the hard asphalt is also an economical material to reduce rutting. Overload and overpressure easily cause pavement rutting damage. Pavement longitudinal grade is not the main reason leading to rutting at the long slope, but brake frequently in the long slope is the real cause of rutting.
The Monitoring System on the Security Situation in Service Area Operations of Expressway Based on the Neural Network Expert System
Authors: Rui Xi Jie , Bai Hua
Published: September 2011

Given the necessity for monitoring security situation in operations of expressway service area, the feasibility of building intelligent monitoring system based on neural network expert system was explored. The study has revealed that: the security situation in service-area operations consists of safety situations of every service subsystem in the area; and the safety situations of every service subsystem were, in turn, determined by the busy degree of every service, the higher level of busyness means the worse security situation in operations. According to this, the variables to measure the states of safety situations in every service subsystem were constructed; Based on these variables, the neural network expert system for evaluating and monitoring the general safety states in service area operations was built; Such a neural network expert system has been successfully trained with the samples and data given by the field experts, which accordingly makes it clear the system is feasible.
Compare and Analysis of Kalman and H∞ Filtering Algorithms in GNSS Vehicle Navigation Data Filtering
Authors: Sun Juan , Xing Jian Ping , Wu Yong , Ma Zhen Liang , Wu Yu Bing
Published: September 2011

In the actual process of navigation, signal interference and inaccurate tracking model can cause inaccurate positioning of navigation. Various filtering algorithms are needed to filter out the interference and improve precision.First of all, this paper elaborates and compares Kalman filtering algorithms and H∞ filtering algorithm, which are both applied in filtering GNSS navigation data. After that, some datas are selected from the vehicle navigation data as the source datas. In the meantime, depend on the ideal model, factors are added into it in consideration of practical application. As a result, the mathematical models for Kalman and H∞ are established. According to the filter algorithm and the mathematic model, simulation programs and their flow charts of Kalman filtering algorithm and H∞ filtering algorithm are all accomplished. Finally, it shows the results of simulation and analyses the problems appeared.
Stress Strain Test System for Rail Vehicle on Virtual Instrument
Authors: Zhu Wen Liang , Li Jian , Yu Fang
Published: September 2011

This paper bases on LabVIEW, combines corresponding NI industrial computer and DAQ card, completes stress strain signal data acquisition and processing automatically. It had real time storage, data processing and other functions. It had the advantages of flexibility using, portability and costly effective. It shows that using the NI computer testing replaces traditional strain measuring instrument, which has an important signification for stress and strain signal data acquisition and processing.
The Prediction Model of Macro-Road Traffic Accident Basing on Radial Basis Function
Authors: Song Cheng Ju , Li Quan Yan
Published: September 2011

The Macro-road traffic accident prediction is an important branch of ITS, which could not only make improving direction, but also improve the traffic operation. The paper based on the analyzing the existing macro prediction model, aiming at the existing shortcomings of prediction models with low accuracy and slow convergence speed, introducing the Radial Basis Function, establishing the accident prediction model between Population, Economic situation, cars, road mileage and the index of accident Statistics, and apply Matlab to Simulation to prove the Feasibility and Practicality of the model.
Research on SA-Based Addressing Model of Slot in Container Terminal
Authors: Huang Jian She , Ren Zhen Zhen
Published: September 2011

The position of Container Terminal as a transit of a complete logistics system is very prominent. With the rapid development of modern port, the rapid increase in container traffic takes tremendous pressure to terminals. The impact of the restowing problem to the operational efficiency is increasingly prominent. The research on addressing model of the container is important to cut down the restowing rate and improve the operational efficiency. A study is conducted on this in this paper.
A Model to Predict Fatigue Life of Concrete Based on Total Strain Energy Density
Authors: Zhang Li , Gong Si Chu , Ma Xu Dong
Published: September 2011

A law on the cumulative damage is presented basing on total strain energy induced as damage parameter to calculate the cumulative damage when the specimens of concrete subjected to fatigue loading.Then the maximum of critical cumulative damage and location of production are determined basing on the equation of cumulative fatigue damage combined with experimental result through using the finite element analysis and the critical plane method in fatigue analysis.The relation equation between the standardized critical total strain energy density and stress level is obtained by considering the impact of loading level.The fatigue life of specimens can be predicted by combining the equation of cumulative fatigue damage with the relation equation of damage and stress level and the prediction results coincide with experimental results very well.
Impact Dynamics Analysis of Shed Tunnel Structure Hit by Collapse Rock-Fall
Authors: Yang Lu , Li Shi Min , Chen Dai Heng , Wu Zhi Min
Published: September 2011

This paper bases on the prototype of the actual shed tunnel structure, study on contact force, displacement, damage, energy of shed tunnel under impact of rock-fall. By ABAQUS finite element software to simulate the process of roll-fall impact knowable: Rock-fall at different speeds and incident angle shocks on shed tunnel has great influence to concrete protective structure of contact force and displacement; Concrete protective structure damage the worst hit area of occurred with roll-fall contact area, the second is inclined leg column top and in connection with the pillars of the beam damage is also very serious, In practical projects first should pay attention to strengthen the intensity of the pillars with beam joints and prevent damage; From the angle of energy we can see that shed tunnel is mainly through the concrete protective structure to absorb and consumption impact energy, soil cushion absorption and consumption impact energy is very limited, to alleviate the impact of concrete protective layer rolling damage, and suggestions in shed tunnel bearing place additional energy shock absorber to increases protection structure system soft degrees under the condition of minimize the shed tunnel weight, achieve the purpose of decrease shock energy.
Effect Factors of Air Flotation Treating Micropolluted Source Water in South China
Authors: Gao Gui Qing
Published: September 2011

The Southern source water carries such characteristics as high algae, low turbidity and micro-polluted. In order to make flotation better applied to the source water, the following factors are researched to find out the influence on the flotation from type and dosage of coagulant, dissol- ved air pressure, air inflow. Aluminum sulphate, ferric chloride, poly aluminum chloride (PAC) are selected. With less PAC, scum generated less, the coagulant dose is 1.25mg/L.Dissolved gas pressure is directly related to bubble size.When the pressure is greater than 0.42Mpa,the effluent quality deteriorates as the pressure increases.The volume of inflow gas into the raw water is related to turbidity and capacity.The higher the turbidity of the water is, the greater the capacity will be, so the higher feed rate can be chosen.
Vibration-Based Damage Detection of Pipeline System by HHT Method
Authors: Bao Chun Xiao , Hao Hong , Li Zhong Xian
Published: September 2011

Pipelines are regarded as the most cost-effective and the safest choice for transporting oil in bulk. In this study, the significance and necessity of conducting damage detection for onshore pipelines is firstly stated. Then, the limitations of current measures in use in pipeline industry and the inherent difficulty of applying vibration-based damage detection techniques (VBDT) to pipeline structures are addressed. This study focuses on exploring the applicability of an advanced VBDT method, HHT method, to the condition assessment of onshore pipelines. The feasibility and effectiveness of HHT method is verified through numerical study. The result shows that for the cases with single or multi segments of damage which are of the same type or of different types coexist in the structure, the HHT method is capable of providing very good results for the damage detection of pipeline system under ambient excitations. The obtained Hilbert spectrum gives very explicit presentation of the structural response’s energy distribution in both time and frequency domain, the marginal spectrum offers satisfactory result not only for locating the damaged area but also for a rough estimate of damage severity.
Discussion of Processing Method for the Nondestructive Detection of Concrete Prestress Truss
Authors: Chen Shang Jian , Cai Jian , Xiong Bing , Li Wei
Published: September 2011

the concrete prestress truss to detect has been built for 47 years,because of function transfo- rmation ,the load increases,it’s necessary to find out that how much load can the prestress truss bear. At the same time,the owner demands that the original structure can’t be desructed during the detection. Based on this,we detect the prestress truss’s bearing capacity by pasting Strain gages to control rods and detect stress, set crane hammer and batch to mesure the roof truss’s deflection,then build model and make finite element analysis ,so as to offer basis of reinforcement design to design organization .
Cationic Counter-Ions as the Controlling Regulation for the Equilibrium Size of POMs in Solutions
Authors: Jia Xiang Feng , Shi Xing Wang , Ma Yong Shan
Published: September 2011

DLS measurements and TEM observations show that the size of the shells grows linearly with the inverse of the dielectric constant of the medium. From the results ,it can be found that two factors of charges and size of the cationic counter-ions can be used to regulate the size of the single-layer shells formed by {Mo72Fe30} in dilute solution.
A Brief Research on Application of Virtual Reality Technology in the Mass Concrete Temperature Control
Authors: Liu Shang Wei , Wei Qun , Jiang Hua , Li Sheng Ji
Published: September 2011

This thesis aims to create and develop an integrated operating system platform by using programming languages, which has comprehends virtual reality technology, database technology as well image animation, all these three newly-found technologies together, and is utilized into the constructive field of mass concrete temperature control management. Furthermore, this research implies a further study of the application of virtual reality in concrete dam construction endowed with all the following priorities, such as: man-made interactive function, effective operability and compatible interface, which can simulate and rehearse all types of constructive schemes visually as well as measures with a practicable intention to provide a certain scientifically theoretical method for the construction of mass concrete projects. Thus, this platform can furnish a dynamic model based on virtual reality and engineering animation for concrete dam designs, pouring and temperature controlling, even can lead the construction scheme into its fullest optimization for any concrete construction as harboring true aims to improve the production efficiency and reduce any risk on costs of the popularization in addition with its application of this new technology.
Particle Flow Simulation for Large Diameter Squat Silos Eccentric Discharge
Authors: Yuan Fang , Dong Cheng Ying , Song Yao Hui , Zhang Song Song
Published: September 2011

The scale model of squat silo in large diameter was established with Particle Flow Code (PFC3D) in this paper. This scale model uses the centrifuge model test principle for reference and provides the field of gravity in the calculation of archetypal squat silo. When the silo filled with granules reaches static equilibrium state, record the static lateral pressure measurement values of its each column measured wall, followed by eccentric discharge simulation in different operating conditions, while monitoring the changes of Measured walls in five different directions during discharging granules, in order to analyze the influence of eccentric discharge on the lateral pressure of large diameter squat silos wall. Thus the following conclusion can be obtained: （1）Overpressure coefficient is close extensive between eccentric distance and far extensive between physical reference of storing material.（2）Under the same condition, the overpressure coefficient of same side wall will be minished with the increasing of discharge port.（3）For the same silo model, maximum pressure coefficient is related with eccentric distance, discharge port size and the position with the wall measured, and its value is greater than the calculated value of standard, because the overpressure coefficient calculation formula is only related with silo diameter and eccentric distance, and this is worth further discussion.
Green Concrete for Sustainable Life-Cycle
Authors: Hwang Chao Lung , Sihotang Fransiscus Mintar Ferry , Bui Le Anh Tuan , Chen Chun Tsun
Published: September 2011

Green concrete is a concrete that supports the content of CO2 emissions reductions by using waste industries as cement replacement. The waste industries that commonly can be used in green concrete mixture design are fly ash, blast furnace slag, silica fume, and rice husk ash. The present of supplementary cementitous material in green concrete mixture can increase both compressive strength and cement efficiency. The higher of cement efficiency, the higher compressive strength and the lower cement content will be. Densified Mixture Design Algorithm (DMDA) is a method that has been widely applied to concrete constructions in Taiwan. DMDA method can support the higher of cement efficiency in green concrete design. By using DMDA to create green concrete with supplementary cementitous material can increase the life of concrete and hence reduce life-cycle cost.
Numerical Heat Transfer Model of Buried Pipe and Ground Thermal Conductivity Measurement
Authors: Yu Ming Zhi , Zhang Lei , Yu Xiao Fei , Fang Zhao Hong
Published: September 2011

A two dimensional numerical heat transfer model of buried geothermal heat exchanger has been established by finite element method. This model is used to analyse the heat transfer between buried vertical pipes and the ground, and determine the ground thermal properties together with parameters estimation method. The ground thermal conductivity of an actual project was measured and the analysis shows that the results can be used for engineering design.
Density Changes and their Impact on Sustainable Recreational Travel to Parks in Large Chinese Cities: Shanghai Case
Authors: Luo Tian Qing , Li Wei Min , Hanna Karen C.
Published: September 2011

Density should impact sustainable transportation but its exact role is still under discussion due to various interpretations and inconsistencies in the literature. To explore its impact on urban recreational travel in large Chinese cities under rapid urbanization, this paper took Shanghai as a case, studied its spatial patterns of both population density and road density, surveyed 11 popular urban parks on user access modes and analyzed the mode changes in spatial terms. The passive effect of low-density urban sprawl on sustainable recreational travel in large Chinese cities was addressed.
Study on Action Mechanism of Polyvinyl Alcohol Polymers in High Performance Cement-Based Composites
Authors: Lin Dong , Wen Zi Yun
Published: September 2011

In order to discuss the action mechanism of polyvinyl alcohol (PVA) polymers in high performance cement-based composites(HPCBC), the effect of PVA on the strength of HPCBC with different ratio of polymer to binding material (P/B) was studied,and action mechanism of PVA polymers in HPCBC were also studied by SEM and X ray diffraction(XRD). Results show that the strength of HPCBC with addition of PVA polymers can be improved greatly,and there exists an optimal P/B with which the strength were upmost; In this experiment, the optimal P/B is 2.5%,and at this point the strength attain extremity with compressive strength and flexural strength of 113.6MPa, 23.0MPa respectively.By using SEM and XRD, it is found that the interface zone structure is improved and so it was of high-density, low-porosity and high adhere-strength, and PVA polymers chemical action works in the course of cement hydration and hardening.
Research on Performance of Green Light Aggregate Six Hole Brick
Authors: Qiao Hong Xia , Hua Long , He Zhong Mao , Dong Jin Mei
Published: September 2011

This paper researches the green six hole brick with crushing autoclaved aerated concrete block and fly ash as the main raw material, and researches its strength, shrinkage and frost resistance in natural maintenance condition and wet maintenance condition by experiment. Research results show that the six hole brick not only keeping environmental health, saving energy and recycling, but also its performance meet the relevant requirements, so it deserves popularization and application.
Application and Research on Material Properties of Sand Consolidating Agent
Authors: Li Shen Gang , Zhao Wen , Wu Di , Li You Ping
Published: September 2011

To inject in coarse sand strata and medium sand strata with cement grout is difficult in subway engineering. To test the component, particle size and viscosity of THE II sand consolidation agent ,the engineering property is got.To calculate the groutability of the grout material in gravel sand strata, coarse sand strata , medium sand strata and fine sand strata of Shenyang strata,it is feasible to inject the grout material into shenyang sandy strata.Research and engineering indicate that the grout material is high groutable and the reinforcement effect is good.
Study of Mechanical Properties of Reactive Powder Concrete with Additives
Authors: Yin Zhi Gang , Huang Xu Dong
Published: September 2011

The excellent mechanical properties of reactive powder concrete (RPC) are tested with under the condition of hot water conservation. Four batches of 19 specimens are prepared to determine the best ratio of RPC component materials. The variation of strength (compressive strength, flexural strength) of RPC with fly ash or tailings powder is studied with two batches of 10 specimens, and its optimal dosage is determined.
A Primitive Blocking Study of Reserves’ Graphs Using Computer-Aided Design
Authors: Meng Zhi Qiang , Ji Hong Guang , Liu Hong Xing
Published: September 2011

All kinds of mining enterprises prefer to use computer-aided design (CAD) in drawing figures of mining reserves. CAD is convenient to operate and ensures the creation of intuitive and beautiful figures. However, CAD causes data error easily due to human intervention. Moreover, CAD wastes time and is prone to omit records. To reduce the incidence of such errors, the current paper examines the transformation of CAD-drawn reserves’ figures and databases into “block” form. This paper also aims to realize the conversion of figure blocks and databases using Visual Basic (VB) in CAD and database applications. To achieve this result, the circle and text are first extracted from CAD form. Then, a series of changes is implemented. Lastly, figure blocks are endowed with new properties. Using this approach can quickly transform figure elements into block properties, achieving good application effects.
A Network Security Situation Awareness Model Based on Artificial Immune
Authors: Zhang Rui Rui , Xiao Xin
Published: September 2011

Network security situation awareness is a new technology for network security monitoring and early warning, and is a hot spot in the area of network security. In this paper, the artificial immune technology is applied to the study of network security situation awareness, and a model is presented and implemented. The paper adopts the artificial immune-based intrution detection technology to real-timely monitor network attacks, and introduces vaccination mechanism to effectively improve the real-time network attack detection abilities of network hosts. In addition,the paper puts forward the concept of network group according to idiotypic immune network theory, and establishes a real-time and quantitive network risk assessment sub-model based on antibody concentration. The changes of antibody concentration are not only related to intrusion intensity, but also to interactions with antibodies in the same network group. To predict future network security situation trends,the paper adopts time-series prediction mechanism based on cloud models. Theoretical analysis and experimental results show that the model is effective to network security situation awareness with advantages of real-time and high accuracy.
Nonlinear Dynamics Analysis on Super Low Noise Mining System
Authors: Liu Xi Jun , Zhang Su Xia , Xu Long Xu , Hou Shu Jun , Huo Bing
Published: September 2011

in this paper, super low noise mining system is analyzed with dynamics model, every constructional element is studied with analysis of kinematics and dynamics, the path of the mass center, angular velocity and angular acceleration of every constructional element is obtained. Nonlinear vibration differential equations of the system are obtained according to Alembert principle. Through numerical analysis, the enforced situation and dynamo load torque of the joint between every constructional element is gained, the influence of crank angle on system response is acquired, and the result has a certain reference value to optimization of the system.
Mechanics Performance of High-Performance Concrete with Polypropylene Fibers
Authors: Du Hong Xiu , Qin Yi Xiao , Zhang Wei , Zhang Ning , Hao Xiao Yu
Published: September 2011

The mechanics properties of HPC mixing different dosage and length of polypropylene fiber were investigated in this study. The results showed that the addition of appropriate amount and length of polypropylene fibers in HPC led to an effective improvement in the tensile strength and a little change in the compressive strength of HPC. The pronounced improvement can be attributed to the beneficial effect of polypropylene fiber on HPC by restraining the generation and development of the micro cracks in concrete, enhancing the level of stress and deformation and damage characteristics in HPC, furthermore, extending the durability and safety of concrete structure.
Numerical Analysis of the Pit Excavation Influence on Foundation Piles
Authors: Feng Shi Lun , Jin Hai Feng , Li Jun , Li Pu Lin
Published: September 2011

Excavation of the soil is actually the unloading process. The unloading process of soil makes the soil uplift, and the soil uplift is restricted by the pit engineering piles. And then, engineering piles should bear the vertical upwards pulling force caused by soil uplift. When pulling force is huge and tensile bearing capacity of pile is low, engineering piles could be pulled apart, and it is harmful to bearing capacity and durability of engineering piles. This paper adopts the finite element method to simulate engineering piles during pit excavation, and studies the traits of engineering piles in various excavation working conditions and different position. The computational results show that the deeper pit, the bigger displacement and tensile forces of piles, and the farther away from edges of the pit, the bigger displacement and forces of piles. In addition, the paper also gives a formula about the relationship between depth of pit excavation and uplift force on piles.
A Study on the Side Effect of the Development of Chinese Real Estate
Authors: Liu Chang Ming , Wang Zhong Qiang
Published: September 2011

Abstract. How to evaluate the follow-up effect of the high-speed development of the Chinese real estate is a topic that has drawn the attention of people with lofty ideas in China or even throughout the world. This essay, taking the method of statistic analysis and synthetically study, put forward a proposition about the negative effect of the Chinese real estate and hold the view that China's real estate development implies a number of negative effects. These are mainly reflect in that the proportion of the real estate investment is too heavy which in turn takes investment away from other industries, the gap between the house price and the citizen's purchase ability is becoming wider and wider which increases the difficulty of the public housing consumption and the real estate foam has showed its appearance in some cities which buries deep risk to the national economic development. In addition, the local government’s over-reliance on taxes of transfer of land and real estate and weak implementation to the central macro-control policies, If this trend continues, it will inevitably lead to that the central government's order is not strictly enforced and the situation is difficult to control.So, it concludes that there's tremendous potential crisis in the Chinese real estate which needs us to treat it with high vigilance and to regulate and control it in a proper way.
Renew and Extension of Vigor in Historical Block - The Background Study of Historical Block and the Building Overhang Protection and Synthesis Reform in Haikou
Authors: Yang Yi , Xiong Yi , Shen Yi Ran
Published: September 2011

Haikou, one of leading historical and cultural city, whose history block and the building overhang is paid close attention to, because of whose entire and continuous value. But it is a long time since established, the function layout and the appearance elements are old, which is far away from the need of society, economy and culture development nowadays, is badly in need of reform. With the start of example area in history cultural block and the following survey, author is going to do a further study of reforming old city background, seeking out suitable local planning method and principle. The article expounds the background, target and constructs intention of Haikou historical block planning design, providing the extended train of thought about the historical block renewal.
Preparation and Structural Determination of Anhydrous Calcium Sulphate Crystal Whisker Material
Authors: Tai Xi Shi
Published: September 2011

In order to investigate the novel preparation methods of calcium (II) sulphate crystal whisker materials, an anhydrous calcium (II) sulphate crystal was prepared by the reaction of taurine with calcium carbonate. The calcium (II) sulphate crystal material was determined by X-Ray single crystal diffraction technique. The results show that the calcium (II) sulphate crystal belongs to orthorhombic, space group Pnma with a = 0.88567(14) nm, b = 0.56639(12) nm, c = 0.72642(13) nm, V = 0.36440(12) nm3 and Dc = 2.482 Mg/m3. The calcium (II) sulphate crystal molecules form coordination polymers by the interaction of calcium (II) with sulphate. The prepared anhydrous calcium (II) sulphate crystal materials have potential application in light weight building materials and refractory coating.
Preparation, Characterization and Photocatalytic Preoperty of BiVO4 Photocatalyst by Sol-Gel Method
Authors: Wang Min , Liu Qiong , Luan Hai Yan
Published: September 2011

Bismuth vanadate (BiVO4) powders were synthesized by complexing Sol-Gel method using citric acid as chelate,calcined at different temperature and characterized with X-ray diffraction (XRD), scanning electron microsoope（SEM）and specific surface area (BET). The photocatalytic activity was evaluated by photocatalytic degradation of methyl orange (MO) solution under visible light. It revealed that temperature values can influence significantly on the morphologies and structures of the products.It also found that the sample prepared with the molar ratio of citric acid to metal inons be 2:1, pH=7 and calcinated under 400°C for 5 hours was pure monoclinic BiVO4 phase.In this conditions, the sample had highest photocatalytic activity with the photodegradation rate was about 94% or so in 20min under 250W halogen lamp.
The Determination of Totall Station's Additive Constant with Triangle Method
Authors: Deng Xian Guo , Pei Gui Hong , Zheng Zi Tian
Published: September 2011

Aiming at the situation that surveyors are difficult to determinate the additive constant and unable to set corresponding constant of the totall station when the lens's constant is unknown, propose the triangle law, which could determinate the lens's additive constant neglecting the effection of multiplication constant. As the triangle law's model is quite complex, it is too difficult to known the formula of precision, monte-carlo principle is used to calculate the additive constant and assess additive constant's accuracy in this model. Finally, illustrated the application of triangle method by an example.
Ponder on the Evaluation for the Implementation Effect of Mining Remote Sensing Monitoring
Authors: Zhou Jin Sheng , Niu Jian Ying , Zhu Rui Bing , Yao Yu Ying
Published: September 2011

The paper firstly introduces mining remote sensing monitoring and the specific implementation situation briefly, and then points out the necessity of the evaluation for the implementation effect of mining remote sensing monitoring. According to the role of "Operability, Integrity, Key and Dynamic” and on the basis of the goal of “Effect, Effectiveness, Efficiency” which is called “3E”, the paper constructs the index system of the evaluation for the implementation effect of mining remote sensing monitoring. At last, the author not only gives his own opinions for the method of the evaluation for the implementation effect of mining remote sensing monitoring, but also presents the specific roadmap of the work. It has reference significance to promote the evaluation for the implementation effect of mining remote sensing monitoring in the whole country
Study on the Campus Public Art under the Influence of Taoist Aesthetics
Authors: Zhen Zhen , Jin Kai , Zhen Xi , Meng Ming
Published: September 2011

This paper investigates the connotation of Taoist aesthetics and applies it to the creation of public art on campus so as to help the campus take on cultural and aesthetics connotation. It also points out that with the influence of Taoist aesthetics public art on campus is of rich aesthetic connotation, which mainly consists of the harmony between man and nature, harmony and coexistence and the beauty of harmony.
Research on Control Network of LED Public Lighting and Integration Technology of Managerment and Control
Authors: Yang Jian Bo , Wang Rong , Wei De Qian
Published: September 2011

In this paper, a integrated control system based on the LonWorks fieldbus to the application of LED public lighting has developed. Advanced control strategy of lighting energy saving has realized in this integrated control system, in order to improve the effect of lighting energy saving and management level. The control network of LED lighting and the specific techniques of integrated control system are mainly focused, including data acquisition, development of lighting control node based on LonWorks, design of lighting control network, implementation of energy saving and management strategy, monitoring and data management of the lighting system. Finally, to verify energy saving effect of the control integrated system and its high efficiency, three campus’s roadway lighting of GuiLin university of electronic technology is taken as the simulated object.
Research for NOx Emission of Nanjing Vehicle Based on IVE Model
Authors: Liu Jun , Dong Jing Jing , Shi Xiao Peng , Wang Hui Zhong , Yang Hao Ming
Published: September 2011

This paper researched on vehicles’ emissions in Nanjing based on IVE model and presented the method to quantify the main inputting parameters of IVE model. This research has collected the traffic of different types of roads in Nanjing. The light-duty vehicles, taxis, buses and trucks respectively accounted for 73.4%, 13.3%, 10.3% and 3.0% of the total traffic volume. According to vehicle driving condition data collected by GPS, the driving cycle of light-duty vehicles in Nanjing was defined. The on-road vehicles’ emission data were measured using the on-board vehicle emission analyzer made by ourselves. Then the correction factors of NOx in IVE model could be obtained using the testing emission data. The results of IVE model showed that the daily NOx emission of light-duty vehicles, taxis, buses and trucks in Nanjing city were 17.79t, 5.51t, 146.37t and 83.78t. Buses and trucks were the main emission sources of NOx, with the contribution of 57.75% and 33.06%.
Study of the Key Technologies of Virtual Architecture System Implementation
Authors: Bi Zhen Bo , Wang Hui Qin
Published: September 2011

“Virtual architecture” is a combination product of architecture and information science, the paper introduces the features of virtual architecture system from its application implementation, and discusses in depth the key technologies from building life cycle, such as BIM technology, notology, digital photogrammetry, virtual reality and parametric design, which hope for borrowing ideas on its implementation from the paper.
Study on Improvement of Simulation Model of Fully Mechanized Top-Coal Caving
Authors: Yu Zhong Lin
Published: September 2011

Based on the traditional David Jolley nine body stochastic simulation model, this article has designed a number of simulation programs of different drawing interval and refuse content. Research indicates that of top coal drawing body in this model upper width compared to lower width is small 1.3 ~ 1.7m, with the top coal drawing rate 50~71%. Improve the traditional stochastic simulation model of fully mechanized top-coal caving, considering temporary retention problems in top vacancy diffusion and horizontal fill issues in module. Under the same working face condition, it additionally builds the improvement simulation programs of different horizontal fill probability. Research shows that 10% increase in horizontal probability, the top coal drawing amount increases 2.2%. When horizontal fill probability reaches 30 to 40%, the top coal drawing ellipsoid body grows to be perfect.