bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparative Study on Channel Heat Preservation and Anti-Freezing Measures in Frozen Soil Region
Authors: Yin Ying Zi , Bu Feng Hu , Miao Jin He
Published: June 2012

Hydro-junction of Hada Mountain is in the frozen soil region, solving antifreeze to eliminate structure deformation failure is the primary problem. By experimental proof, using channel insulating and anti-freezing can effectively solve the problem of soil frost heaving, and play a very important role in improving engineering quality and prolonging engineering life. In this paper, through a freezing period of field observations, according to the site laying insulation board of different thickness has greatly effect on reducing channel frost heave and improving channel temperature, Increased substrate temperature and provide reasonable design scheme and reasonable thickness of polystyrene board for other channels in this region, thus in greatly degree can improve channel frost heave phenomenon.
Influence of Anisotropic Internal Friction Angle on the Stability of Uniform Soil Slopes
Authors: Zhang Lian Wei
Published: June 2012

The effect of anisotropy of friction angle in natural deposited soil on the stability of soil slopes was studied in this paper. Stability analysis was performed on a uniform soil slope with anisotropic friction angle. Spencer’s method was used, and the variation of friction angle was assumed to be linear to the change of direction of the slip surface. It was shown that 7-10 percent of change in safety factor might achieve within a 10m-highed anisotropic soil slope. It was also found from the analysis that that frictional anisotropy had no obvious effect on the location of critical slip surface.
A Two-Fluid Model for Water Drop Falling
Authors: Wei W.L. , Lv B. , Liu Y.L. , Yang X.F.
Published: June 2012

In this paper, a numerical two-phase flow model combining with the Realizable k–ε turbulent model for compressible viscous fluid is presented for the computation of water drop falling characteristics; and the equations are solved with the finite volume method. The free fluid surface is simulated by the VOF method. A multigrid technique based on the full approximation storage (FAS) scheme is employed to accelerate the numerical convergence. The numerical results for water drop suggest that this basic model can be used to study violent aerated flows, especially by providing fast qualitative estimates.
Feature Selection Method for Manual Operated Directional Valve Based on EMD and GA-PLS
Authors: Qi Jing Li , Fu Sun , Chen Jian Si
Published: June 2012

A feature selection method for manual operated directional valve based on EMD and GA-PLS is proposed. Vibration signal from a manual operated directional valve is difficult to find the main fault features. The EMD method is used to decompose the vibration signal into a number of intrinsic mode function (IMF) components. Auto-regressive (AR) model is a time-series tool which can represent the important information of system state. Therefore, AR model of each IMF component is established. The AR parameters and the loss function are regarded as the feature vectors. In order to reduce feature vectors, Genetic algorithm-partial least squares (GA-PLS) is a suitable method for selecting effective features. GA-PLS method is used for selecting new features from these feature vectors, which constitute the AR parameters and the loss function. Experimental results show that this method can be applied to select features effectively.
Remote Sensing and GIS in Identification of Groundwater Potential Zones: A Study at Thirumullaivasal Village, Nagapattinam District, Tamilnadu, India
Authors: Rajesh Kumar V.
Published: June 2012

The demand for need of groundwater goes with descending powers, when compared with the available natural resources to meet the expectations of Agricultural, Municipal and Industrial needs. Consequently, groundwater is being withdrawn from storage and water levels are declining resulting in crop failures, seawater intrusion in coastal aquifers, land subsidence etc. This urges the need of artificial recharge of groundwater by augmenting the natural infiltration of precipitation into subsurface formation by some suitable methods of recharge. This inturns expects the quantitative availability of groundwater in the area, at the earliest, to follow suitable recharge methods. This rapid determination is found possible only when Remote Sensing and GIS approaches are applied in addition to conventional methods, where time frame is lagging. In this study, Remote Sensing and GIS approaches were used to identify groundwater potential zones in Thirumullaivasal village of Nagapattinam district of Tamilnadu. Various thematic maps were prepared for the factors that influence groundwater such as rainfall, soil type, land use, slope and geology using satellite imageries, toposheets and data from Government and other organizations. Ranks and Weightages were assigned for different categories by devising criterion table and Cumulative Suitability Index (CSI) values were found out using Multi-criterion analysis of the prepared thematic maps through GIS. Based on CSI values, the area was prioritized into different groundwater potential zones for future investigation.
Based on High Resolution of Remote Sensing Data Mining Houses Information Extraction Methods Research
Authors: Sun Yan Hua , Wang Ping
Published: June 2012

High resolution remote sensing images generally refer to image to the spatial resolution within 10m aerospace、aviation remote sensing images. The emergence of high-resolution images strengthened the ability to recognize the large scale features, especially for the extraction of houses information in mining area. High spatial resolution image has rich delicate texture feature, it is urgent to solution the problem of how to extract the features. The technology is very useful for statistic houses information、village relocation assessment and research of pressure coal status, providing important data basis for village relocation, statistics, assessment. Taking henan as a mining area for example, houses information extraction methods are discussed. This paper mainly research contents as followings: It is combined with the space texture information of high resolution imaging rich, using different methods to extract building information, including followings: First, ordinary image segmentation technology; this method is simple and feasible, but extracted housing information is not accurate. Second, the object-oriented method of feature extraction technology, visualization degree and extracting accuracy of this method is higher; Third, it has conducted the preliminary height extraction of the houses; according to the solar altitude angles and the shadow of the houses to calculate the height of the houses. And considering the influence of undulating terrain, using the terrain DEM data to analyze study area, finally determined the shadow length, and then used solar altitude angles to calculate houses height. Based on the verification, accuracy evaluation results show that houses contour information extraction accuracy is: accuracy of the number and area is over 80%, the total rate of wrong classifications is lower. Houses highly information extraction accuracy is within the 85%. The research methods are effective.
Design of Surveying and Mapping Network Computing Platform
Authors: Zhou Qiu Sheng , Yang Jin Ling , Cao Xian Ge , Si Hai Yan , Liu Yan
Published: June 2012

In technology, Surveying and Mapping network computing platform integrated the Surveying and Mapping calculated functions and to achieve a network share, users can easily realize the calculations in network, the computing platform also changed the single plane version software’s original data storage mode; in applications the platform can be provided to the education sector as well as Surveying and Mapping related research and production units; Surveying and Mapping network computing platform model is also beneficial to the industry standard of unity.
The Research on Implementation Methods of 3D GIS
Authors: Gao Yan Li , Li Wen Bin , Shang Chang Zheng
Published: June 2012

3D GIS is an intuitive and effective method of realistic geo-information. Its spatial analysis function meets the user’s needs of inquiring and analyzing to the geo-information. 3D GIS has been widely used in geoscience and urban planning. This article introduces the 3D GIS firstly. Then it discusses the implementation methods of 3D GIS in detail. These include underlying development, secondary development and implementation by remote sensing images. At last, their merits and faults are analyzed, and the paper gives the suitable conditions for different applications.
The Establishment of Geodetic Datum in Jiaonan City
Authors: Wang De Bao , Fang Xue Ling , Xing Zhao Bo , Huang Jun
Published: June 2012

As to Jiaonan geodetic datum, third-order horizontal control network is established through GPS while third-order leveling network is established through electronic level. This paper illustrates how to process data so as to improve horizontal and vertical precision in the process of establishing third-order horizontal control network and elevation fitting. It puts forward such an opinion: making precision test for starting points of horizontal network and preserving those short baselines of low precision in unconstraint three-dimensional adjustment；As to elevation fitting, we advocates employing a variety of fitting scheme make precision inspection for those known GPS leveling points as well as those unknown points’ fitting level. Then the most probable level is just what we get. Afterwards, we calculate those unknown points’ root mean square error of fitting height, plus the minimum and maximum difference between fitting height and the most probable height. Taking all the results of precision inspection into consideration, we can find out the best fitting scheme, which improves the systematic precision and reliability of geodetic datum.
Analysis and Controlling of the Surrounding Rock Stability Mechanism in Underground Engineering
Authors: Bao Xian Kai , Li Guo Qiang
Published: June 2012

This thesis introduces various factors of surrounding rock stability mechanism and instability modes, indicates its control methods and thought. The achievements apply well in engineering practices and have good values and researches on surrounding rock stability have instructive significance in engineering execution.
Research and Application of the Refining Method of Region Quasi-Geoid
Authors: Zhao Ya Hong , Zhang Li Hua , Wang Jin Xing
Published: June 2012

GPS technology has penetrated into all fields of surveying and mapping disciplines,and has been widely used in leveling measurement .By studying the feasibility of the refining of region quasi-geoid based on the existing quasi-geoid,this paper shows a new method which is a combination of the Earth's gravity field model and the GPS leveling fitting method to determine the region quasi-geoid and provide the specific ideas and calculation steps and do analysis and discussion about the feasibility and superiority of this method using actual data.This new method makes full use of the advantages of the high resolution of the gravity geoid and the high-precision of the GPS geoid to realize the complementary strengths.
Current Digital Cadastral Surveying Method Research
Authors: Chen Yun Fang , Shi Bo , Zhong Ruo Fei
Published: June 2012

Digital Cadastral is direct application results of digital mapping technology to cadastral surveying, which could enter cadastral management system directly to accomplish city digital cadastral databases to meet needs of information-based cadastral management and digital city. With discussion of common method and technology of digital mapping, system configuration and working mode of digital mapping system were presented firstly, and then concerned contents such as survey instruments, observation methods, data collection patterns and mapping software etc. were explored. Aiming at three widely used field digital mapping methods, working pattern and mapping mode of coding mapping method, sketch mapping method and electronic plate mapping method were compared, and then surveying precision, work efficiency and existing problems were analyzed. Subsequently, concrete working flow of digital Cadastral Surveying was layout. In the end, some corresponding conclusions were gained consequently and future development trend expectation was proposed.
Experimental Research on Strength Characteristics of Bulky Rock Material with Different Coarse Grain Content in Waste Pile of Mine
Authors: Du Jun , Hou Ke Peng , Liang Wei
Published: June 2012

Bulky rock material of waste pile was composed of discarded rock and soil which was blasted and stripped from stope. It was characterized by dispersibility, complexity and variability. Shear strength index of bulky rock material was the main basis for analyzing slope stability of the waste pile. After the study on bulky rock material with different coarse grain content by indoor direct shear test, the results indicated that there was no obvious peak strength during the shear process, and variation of the shear displacement was slight in initial horizontal loading stage. Horizontal loading increased slowly and shear displacement had obvious change when shear displacement exceeded 5mm. Under the same normal stress, shear modulus G0.01 increased with the increase of coarse grain content when shear strain of specimen is 1/100. Shear modulus G0.01 of the specimen with same coarse grain content increased with the increase of normal stress, varying sensitive of G0.01 reduced when coarse grain content was larger. When the specimens with same coarse grain content were under failure, the shear modulus Gfailure was smaller than G0.01. Cohesive force c of the bulky rock material began to increase and then decrease with the increase of coarse grain content, and reached its maximum of 31.25KPa when the coarse grain content was 70%, internal friction angle increased with the increase of coarse grain content.
A New Dynamic Prediction Method and its Application in Prediction of the Colluvial Landslides Induced by Rainfall
Authors: He Ke Qiang , Yan Qiang Gang , Chen Wei Gong , Zhao Min
Published: June 2012

A lot of data indicates that rainfall has always played the very important role in landslide triggering. The paper discusses rainfall as a dynamic parameter in term of the load/unload response ratio theory, using the Xintan landslide as a case study. Analysis of the available data indicates that the occurrences of landslides in this region are controlled by rainfall, whose intensity and rainfall processes are the most important dynamic factors in determining the stability of slopes. Therefore, the relationship between rainfall and the movement of typical landslides has been specifically analyzed for the Xintan landslides by using the loading/unloading response ratio parameter of rainfall. The result of this study indicates that the mutation of the loading/unloading response ratio of rainfall of the Xintan landslide in the Three Gorges Reservoir regions, China occurred just before their destabilization, which shows that the loading/unloading response ratio of rainfall and its changing feature can be taken as a precursor for the landslides induced by rainfall.
The Effect of Initial Sampling Moisture Content on Anisotropic Behavior of Remolding Saturated Silt
Authors: Guo Ying , Ma Hua , Zhang Jun Feng
Published: June 2012

By using the soil static and dynamic universal tri-axial and torsional shear apparatus, the experiment was performed on remolding saturated samples of Shan-Dong Dong-Ying silt which was prepared respectively with 0%, 5%, 10% initial sampling water content. A series of stress-controlled undrained monotonic torsional shearing tests were conducted under the same conditions of initial mean principal stress as 100kPa, initial intermediate principal stress coefficient as 0.5, initial deviator stress ratio as 0.433, but with different initial orientation angle of the principal stress at 0o, 30o, 45o, 60o, 90o. During the test the intermediate principal stress coefficient and mean principal stress were controlled constantly. The anisotropic behavior of the silt were discussed through the effects of initial sampling water content and initial orientation of the principal stress on the incremental stress-strain relations of different orientations, and the strain path. It was shown that the initial sampling water content had a remarkable influence on initial anisotropic behavior. Under the same condition, the higher the initial sampling water content is, the less obviously the anisotropic behavior is. The difference between the strain path and the stress path was obvious.
The Application of Workflow Technology in Equipment Supply Support
Authors: Xu Shu Ping
Published: June 2012

To change the low efficiency in manual operation and non-uniform standard current situation in current aviation materials management, design a set aviation material support system based on workflow technology. Research analysis of aircraft equipment supply support and established the workflow technology to aircraft equipment supply support in the life cycle of wood figure and to study every aspect of the life cycle based on workflow model and related theories. Finally, aviation material storage as a example completed the workflow processes of he storage of aviation materials and solutes long complex and varied issues in the aviation materials management business processes ,the results show that the workflow technology apply to aircraft equipment supply support has practical value.
The Posttensioning Method of Prestressed Concrete Continuous Box Girder Construction Technology
Authors: Han Jin Liang , Li Ji Guo , Mo Zong Yun
Published: June 2012

In this paper, prestressed concrete continuous box grider with prestressing method was introduced, including construction technology, construction methods, main construction equipment, the main materials and semifinished products and the dispose of main problems in the construction of the processing.
Time Frequency Analysis of Blasting Vibration Superposing Signal under Different Millisecond Intervals
Authors: Zhang Wei , Chen Shi Hai
Published: June 2012

Based on the measured single-stage blasting vibration signal, time-frequency characteristics of two single-stage superposing signals were analyzed under the condition of different millisecond intervals ranging from 1ms to 350ms, also, variation laws of dominant frequency, amplitude and energy of the blasting vibration superposing signal with the delay time and the determination method of rational millisecond interval of similar engineering were put forward. Then, changing laws of the millisecond interval with the interference effect was obtained. It is found that, millisecond delay blasting does not follow the disturbance vibration reduction theory strictly that the vibration effect is weakened when interval is (2n-1)T/2 and strengthened when interval is nT, and the more similar the vibration characteristics of single-stage signals are, the larger the maximum amplitude declining rate of the obtained superposing signal is.
An Introduction to a New Drum Centrifuge at DUT
Authors: Wang Zhong Tao , Xu Bo , Luan Mao Tian , Yang Lin Qing
Published: June 2012

Geotechnical centrifuges are globally used to investigate the structures which of behaviors are strongly dependent on the physical properties of soil. A new 1.4 m diameter 450 g-Tonne drum centrifuge GT450/1.4, manufactured by Broadbent & G-max company, has been installed at Dalian University of Technology in 2009. Control and data acquisition systems are provided in modular form, allowing a flexible choice of sampling and recording modes. The details including the development of the facility, the additional accessories required and a centrifugal test of submarine landslide are described.
Model Experiment of Ice Breaking by Moving Air Cushion Load
Authors: Sun Bang Bi , Zhang Zhi Hong , Wang Chong , Gu Jian Nong , Miao Tao , Wang Lu Feng
Published: June 2012

According to the differential equation of thin elastic vibrating plate and the similarity theory, the similar relationships of corresponding parameters between model and prototype as well as between the ice-like material and the real ice are established. A high accuracy non-contact laser displacement measuring system is developed to obtain the surface deformation of the ice-like material. A speed measurement and positioning system is established for the moving air cushion load. At different moving speed of air cushion load, a series of experiments of the deformation of ice-like material are carried out in towing channel which the depth of water is variable. At critical speed the maximum deformation of ice-like material can be caused, and the theory is derived and analyzed. Research results present the basis of ice-breaking for practical air cushion vehicle (ACV).
Vibration Analysis of Masonry Structures due to Blasting Construction of Mountain Tunnels
Authors: Wang Tao , Fang Zhong Qiang , Li Hao
Published: June 2012

Blasting construction of Houyuntai Mountain tunnels has vibration influence on ground masonry structures. 3-D finite element model is established to analyze this problem which indicates the house’s vibration response velocity induced by blasting loads. According to this analysis, the structure range of removal and strengthening is assured based on the allowable safety standard of 0.02~0.025m/s of blasting vibration. They include that the houses in 20m range of both sides of horizontal tunnel axis should be removed; the security in 20~28m range is not good, as a result the houses should be removed or strengthened; and the security over 28m range is good for houses. Moreover, some factors such as construction quality can influence houses’ anti-vibration safety.
Integral Space Concrete Roof Construction Method Research
Authors: Zhao Ke Chao , Zhao Jin Cheng , Xu Ji Xiang
Published: June 2012

Integral space concrete roof is a kind of new structure, it has the following characteristics: its integrity is very strong and the structure size is larger, its construction method is different from the general of roof structure. In order to promote its application, its construction method is researched by to adopt the technology of "high in-situ construction" and in combination with the construction a grain storehouse. In this paper, the key points of the construction is analysed and the key technology is researched, that’s including: the design of the holding bracket; the construction design of the high tension pedestal and the tension of the prestressed steel, etc. Then put forward the key points of the construction. Finally, the construction method of the roof is summarized, and the application conclusion is obtained.
Application of Formwork Technology in Engineering
Authors: Zheng Xian Chun , Li Zhi Qiang , Sun Si Zhong
Published: June 2012

Installing and dismantling the formwork are not easy in cast-in-situ multi-ribbed slab construction,the formwork technology overcomes the difficult problem.This paper mainly introduces the construction technology and quality standards of the plastic formwork.Through the engineering practice,the author sums up the advantages of this technology.
Study of Blasting Seismic Effect and Controlling Technology
Authors: Xie Bing , Guo Li
Published: June 2012

The difference between seismic caused by blasting and earthquake has been analyzed and the destructive effect of blasting seismic also been discussed. The typical seismic controlling technology such as choosing explosives reasonably, limitting the charge which blasting at the same time, dispersing charge, using millisecond blasting, selecting reasonable charging structure, excavating damping ditch and using pre-splitting blasting technology has been discussed.
The Mechanics Analysis and Research of Multi-Suspension-Centers Integral Lifting Technology for Long-Span Steel Roof
Authors: Zheng Jiang , Hao Ji Ping , Zhong Wei Hui
Published: June 2012

In construction of the steel roof a computer-controlled lifting construction technology was adopted. It differed from other similar projects in some points. First, the steel roof had large area, long-span and huge weight; next, the structure form in lifting process differed from the design status; at last, the deformation of steel roof in lifting process could not been ignored. If these characteristics could not been considered in lifting process, it maybe bring large project accident. So in this article the finite element model of the structure in the lifting status had been rebuilt. Considering the displacement difference the lifting process had been analyzed. By the analysis the influence of the displacement difference of the lifting points could be found out. Comparing with the value of the construction measure the finite element model could be validated and corrected. The conclusions of research could be used by the similar construction.
Construction Technology Research on Super Glass Curtain Wall of the Henan Art Center
Authors: Fu Ya Nan , Mao Hai Tao
Published: June 2012

Henan Art Center has a new curtain wall structure - the structure cable net glass wall. Because of the cable net structure for glass curtain wall construction and design difficulties, the design of curtain wall performance to deepen the main points of cable net structural wall of the working principle, design connections, cable net structural wall of the cable construction steps, cable pre-stressing and tension when the technical parameters and under the glass curtain wall materials and installation was introduced. And the main factors affecting the performance curtain wall and the cable tension when the ambient temperature and the tension stress was studied. The results showed that the construction program was optimize and construction quality and safety was ensure.
Analysis of Cracks in Concrete Beam Impacted by Construction Technology
Authors: Tang Xian Xi , Zhu Yan Peng , Tang Xian Zhou , Guo Wei
Published: June 2012

There were many factors which caused cracks in the concrete beam, but some factors were often not be attention enough. In this paper, Combined with three kinds of crack occurrence in construction of concrete plate, the reasons leading to crack by construction technology were analyzed in detail, which including the construction process, curing conditions and controls of cover thickness, and the solution were given also. The result of analysis had guiding roles of crack controlling in concrete structure construction.
Study on Constitutive Mode of Three Typical Rocks Based on Triaxial Compression Test
Authors: Chen Kui , Yang Ren Hua , Xu Tao , Qi Ya Jing
Published: June 2012

In order to study the relationship between the design parameters of the shield machine and the strength of rock, the behaviours of rocks under the conventional triaxial compression, the complete stress-strain curves under different confining pressures of three typical rocks, i.e. granite, limestone and red sandstone, were taken out for analysis. From the curves, the values of elastic modulus E and Poisson's ratio μ were gained and the relationships between the following parameters were figured out, which are peak strength versus confining pressure, residual strength versus confining pressure, strain at peak strength versus confining pressure, and strain at residual strength versus confining pressure. According to the values and relationships, the complete stress-strain curves were divided into three parts. For each part, a constitutive equation was established by using the strain softening trilinear elastic-brittle-plastic constitutive model, and all the related parameters in the constitutive equations were also presented, which provide a theoretical foundation for the digital design of the cutter head and cutters of Shield machine.
The Construction Technology and Numerical Simulation on Tunnels Throughing Fault Fracture Zone with Rich Water
Authors: Duan Bao Fu , Zhu Ying Lei , Li Lei , Wu Sheng Zhi
Published: June 2012

Fault fracture zone with rich water has some bad geological conditions such as low strength, deformation, strong water permeability, poor water resistance. Landslide has been happened because the water permeability. This paper is based on Yan-jia Tunnel in HuBei-Guzhu Highway. For the bad geological conditions, WSS is taken as the advanced support method to reinforce soil and stop watering. The method has improved the construction condition. To reduce the excavation area in one time and the disturbance to surrounding soil, the construction method of meshshotcreting firstly is adopted. The paper also do the numerical simulation with the numerical calculation tool of the software ABAQUS. The result is basically consistent with the field measurements, which has significance on the subsequent design and construction of underground projects with similar geological conditions
Knowledge-Based System for Major-Pieces Lifting Project Using MRM
Authors: Lv Zhan Min , Yan Wei , He Jun Liang , Chang Dao Fang
Published: June 2012

Knowledge-based system (KBS) for major-pieces lifting projects can be useful for improving the level of decision-making. And it is important to use the knowledge acquired from domain experts to finish all kinds of projects for lifting major-pieces. Knowledge acquisition plays a critical role in constructing a KBS for major-pieces lifting project, also it is commonly regarded as a major obstacle and bottleneck in the process of designing and implementing a KBS. This paper presents a KBS model based on matrix representation and mapping (MRM) approach to facilitate the effectiveness of knowledge acquisition in constructing a KBS. A case study on practical application is employed to illustrate how the KBS works.
Analysis of an O-Cell Pile Test in Jinan with FEM
Authors: Zheng Ying Jie , Dai Xue , Li Lian Xiang
Published: June 2012

In order to promote the experience of applying O-cell pile test to determine the behaviors of integral pile in Jinan, a case of O-cell pile test in Jinan was analyzed with proposed approach. The pile-soil system was simulated with FEM. The resistance parameters of piles, the load-displacement curves and the ultimate bearing capacity of integral pile were determined. Comparing with results obtained from load transfer method, it is found that the p-s curve of integral pile obtained from load transfer method is conservative.
Research on Back Analysis of Parameters for Excavation of the Underground Cavern Group of a Large-Scale Hydro-Power Station by Using Orthogonal Optimization
Authors: Yang Wen Dong , Gao Xi Chao , Zhang Yan Mei , Yang Jia , Wang Gang , Zhang Qiang Yong
Published: June 2012

Engineering rock mass is a highly complex grey system, it is impossible to get all the parameters of rock mass by theoretical methods or field measurement approach. Underground engineering feedback analysis method is a reliable way to improve the design, optimization and construction. Based on the field data of underground cavern of a large-scale hydro-power station, the three-dimensional finite element model is established, and orthogonal experimental design and multi-objective optimization method are used for the rapid back analysis. This method could be used for obtaining the rock parameters by inversion calculating in the underground cavern construction of a large-scale hydro-power station. Meanwhile, the inversion parameters could also be applied in the excavation simulation for the next phase and the rock deformation and stability is predicted afterwards. The design and construction sectors are supposed to get its feedback in time, which effectively guarantees the stability of the surrounding rocks.
The Design and Construction of the Lime Soil Cushion in Loess Regions
Authors: Xu Yun Bo , Li Jing
Published: June 2012

The upper soil layer is weakness and not as a natural foundation. The middle soil layer is collapsible loess, the lower soil layer is good but buried deeply. After discussion, the ground treatment method using the lime soil cushion. This paper calculated the bearing capacity of the lime soil cushion, and designed the thickness and width. And checked the bearing capacity of the weak underlying layer, and discussed its construction and testing measures.
RFID Anti-Collision Method Based on Particle Swarm Optimization and Support Vector Machine
Authors: Zhao Wen Ge
Published: June 2012

RFID anti-collision method based on particle swarm optimization and support vector machine is presented in the paper. Support vector machine is a new detection technology,which is applied to RFID anti-collision detection. Particle swarm optimization algorithm is applied to choose the appropriate parameters of support vector machine. Particle swarm optimization algorithm can make the particle move toward the optimal resolution based on the history best experiences of each particle and global best position in swarm.The proposed RFID anti-collision structure is mainly composed of protocol processing module, interface module, RFID anti-collision method and serial-parallel conversion.The testing results show that RFID collision detection accuracy of particle swarm optimization and support vector machine than that of traditional support vector machine and BP neural network.
Study on the Evaluation of Scientific Research Achievements Based on the BP Neural Network
Authors: Hou Xiao Hui , Huang Lei , Li Xue Fei
Published: June 2012

The scientific research achievements are evaluated based on the BP neural network method which is developed in this paper. According to the analysis and consult with the well-known experts, set up the evaluation index system of scientific research achievements, and based on it, the BP neural network model which is used to evaluate the scientific research achievements is established. Through an actual example, in order to improve the solution efficiency, use the Matlab software to solve the model and get the evaluation result of the scientific research achievements in the example. The evaluation result has high accuracy and could meet the basic actual needs. The evaluation method which is set up in this paper will benefit to our country's evaluation index system of the scientific research achievements and will promote the development of evaluation methods of the scientific research achievements.
Numerical Simulation of Crack Propagation in Rock with Kriging Interpolation Element-Free Method
Authors: Fan Cheng , Chen Geng
Published: June 2012

Presented in this paper is a new element-free formulation built shape function using moving Kriging interpolation method instead of moving least squares method. The merit of the proposed method is that the shape functions constructed using this method have the property of Kronecker δ-function property which made the essential boundary conditions be easily implemented. The fundamental theory of this procedure is illustrated and numerical analyses of examples show that the proposed procedure is an effective and simple method with higher computational accuracy.
Numerical Simulation on Beam-Column Joint in the Added-Layers Steel Structure under Monotonic Loading
Authors: Wang Hai Jun , Yao Yong , Chu Yun Peng , Chen Dai Guo
Published: June 2012

Add layers for low-rise steel structure building can improve its using function. Use ANSYS analyze three added-layers beam-column joints of steel structure under the Monotonic loading. The results showed that: the joint reinforced by angles belongs to semi-rigid joint. Considering the construction and Structural requirements, the performance of this type joint is the most economical of all. The three joints all experience fully elastic deformation before them destructed, although the joint with only weld is deformation and failure, and the joint reinforced by haunched slab have larger deformability to resistance the plastic deformation, ultimate bearing capacity and initial stiffness, is one of the most conservative way of the joint’s reinforcement.
Principles of Software Engineering and their Applications
Authors: Huang Rui Hua
Published: June 2012

Software engineering lacks maturity compared to other engineering disciplines. The research goal of this thesis is to contribute to the software engineering discipline from an engineering perspective, through the identification of software engineering fundamental principles and the description of operational guidelines for these engineering fundamental principles. This research study on the set of candidate fundamental principles will contribute to a better understanding and possibly from an engineering perspective.
Numerical Simulation of Ultimate Capacity of Suction Caisson Foundations by FEM
Authors: Wang Zhi Yun , Sun Yue , Wang Chuan Cheng
Published: June 2012

As a newly developed type of foundation for deep water offshore and marine engineering, the suction caisson is usually subjected to combined loading of vertically uplift load, horizontal load and moment. Performance evaluation and design theory for such a new type of foundation can not meet the basic requirements of engineering practice sufficiently at present. In this paper, the general-purpose finite element analysis package ABAQUS is employed to conduct three-dimensional numerical analyses on load-carrying features of suction caisson foundation. Then the ultimate bearing capacity of suction caisson foundation under monotonic load for two drainage conditions of the soil is evaluated by displacing-controlling procedure.
Automatic Statistic of Rock Mass Discontinuity Attitude Elements Based on K-Mean Clustering Analysis
Authors: Liang Jun , Zhao Jun Hua , Han Xian Quan , Li Bo
Published: June 2012

The rock attitude elements play important role in the fields of both mechanical properties and stability analysis. The traditional statistical graphs such as rose diagram, isopycnic graph and angle histogram are displayed which can roughly estimate the dip direction and angle of rock mass. And k-mean clustering analysis is applied to rock mass discontinuity attitude automatic statistic which can determine the the dip direction of rock mass accurately and estimate the proportion of gathered data. The K-mean clustering analysis is a beneficial supplement of traditional statistical methods, which has a prospect of engineering application.
Characteristics Analyses of Energy Consumption for Boom Closed Circuit of Hydraulic Excavators
Authors: Chen Ming Dong , Zhao Ding Xuan
Published: June 2012

The boom with closed circuit in Hydraulic Excavators, which is made up of motor, hydraulic pump and accumulator, was put forward based on analysis of the operating condition of ordinary hydraulic excavators and mathematical models of system were built. Power characteristics of main power elements were obtained under typical operating conditions, and then the energy consumption characteristics were analyzed. The results show that the installed power and energy consumption will be reduced using boom with closed circuit, and no-load drop and full load rise of boom are the worst operating conditions.
The Decipherment of the British Royal Marines Barracks Building on Liugong Island, Weihai, Shandong Province
Authors: Gao Yi Sheng , Tao Bin
Published: June 2012

This paper studies the British Royal Marines Barracks Building within the site of the Beiyang Naval School on Liugong Island, Weihai City, Shandong Province, and deciphers its background, layout, structure and decorative characteristics. It takes the British Royal Marines Barracks Building as an example to explore the historical and cultural value contained in the architectural heritage built in Weihai during the British lease period in 1898 to 1940. It provides some valuable data for research, conservation and use of the historical architectural heritage built in this special period.
Study on Slaking Particle Distribution Characteristics of Carbonaceous Mudstone
Authors: Fu Hong Yuan , Zhou Gong Ke , Zeng Ling
Published: June 2012

In order to find out the slaking mechanism of carbonaceous mudstone, this study puts two different samples in the indoor soaking slaking test, one of dried sample and the other original one. After comparing the characteristics of carbonaceous mudstone slaking particles 's distribution under different moisture content conditions , the result shows: The main reason for carbonaceous mudstone slaking is the change of moisture content resulting from dry-wet circulation. The difference in moisture content partly affects the process and slaking product before slaking. The lower the moisture content is, the smaller the slaking particle diameter is and the more thoroughly the slaking is. As the particle diameter of the slaking product decreases, its slaking gradually weakens and even disappears.
Dual-Interface Security Smart Card Based Secure Authentication Method of Remote Payment in E-Banking
Authors: Li Ping , Zhou Qing Lei , Zhu Wei Jun , Zhao Yun Yan , She Wei
Published: June 2012

The paper presents a secure authentication method, which is based on dual-interface security smart card, for remote payment in e-banking. With the method, the traditional USBKey can be replaced. Thus, a considerable cost for allotting USBKey can be saved, and people will be more convenient to do online transaction in e-banking.
Finite Element Simulation of RC Shear Wall Components
Authors: Wan Hai Tao , Li Peng
Published: June 2012

Reinforced concrete (RC) shear wall component is a very important lateral force-resisting member which is widely used in China. Its seismic behavior has a great impact on the seismic performance of the overall structure. Damage of some RC shear wall structures under the earthquake is caused by the damage of shear wall components, So shear wall components are an essential seismic members. However, the test datum are not enough to study the performance of RC shear wall components, Therefore, Finite element simulation of RC shear wall components is performed by software ABAQUS in the paper. Through comparing with the finite element simulation and the test of load - displacement skeleton curve, failure mode and steel bar strain, the result shows that the finite element simulation can more accurately simulate the situation of the test, verifying the finite element simulation is the most important research tool besides test.
Hardware Circuit Design of Laser Raindrop Spectrometer
Authors: Yang Bi Feng , Liu Jun , Zhan Yan Jun
Published: June 2012

Tipping rain gauge is used for rainfall information collection in the most current weather stations. In view of this situation, a new type of rainfall information collection system named the laser raindrop spectrometer is designed by using optical methods combined with ARM9 technology. The system uses a square wave modulation of the laser and processes the received signal through the FPGA and ARM9, and derives rain rate, size, density, rainfall and other information through a unique algorithm. It solves the tipping rain gauge’s situation of "do not turn to win rain, light rain without turning ". Experimental results show that the system is stable and reliable. It not only can be used to measure precipitation, but can identify weather phenomena. So it has a certain practical and promotional value.
Visual Identity Problems and Integrated Measures on Space Design under the Concept of System Design - Design of Underground Garage as an Example
Authors: Liu Hua Dong
Published: June 2012

The concept of system design requires to conduct design integration while breaking specialty barriers. This leads to the broadening of design vision as well as the development of new design methods. Underground garages in urban residential districts fail to meet humanized demands because of the single design guideline of underground transportation buildings. Introducing the design concepts such as visual identity guidance, landscape design and space design, etc. and diversifying design methods, based on the idea of people-oriented, can enhance the quality of space environment, improve the dehumanized situation and obtain various benefits.
Study on Privacy Preserving Technology in Data Publishing Scenario
Authors: Xu Yong , Zhou Shan Ying , Sun Yu Tao
Published: June 2012

In recent years, many data sets are accessed for the purposes of research, cooperation and e-business, and so on. Publishing data about individuals without revealing their private information has become an active issue, and k-Anonymous-based models are effective techniques that prevent linking attack. We analyzed the privacy leakage problem in data publishing environment. Then we concluded the privacy preserving technologies, and clarified the k-anonymity models. Finally we conclude the directions of this area.
Slope Stability Assessment Based on Fuzzy Matter-Element Extension Model
Authors: Liu Jin Feng , Ou Guo Qiang , You Yong
Published: June 2012

The slope stability assessment is performed to assess the safe and mitigation design of slopes and the equilibrium conditions. This paper selected Duke River located in Rangtang County, Sichuan Province, Western China as study area to delimit the areas liable to slope failure hazards. The fuzzy matter-element extension theory was used to analyze the slope stability of the study area. Six factors including slope, slope type, lithology, rainfall, elevation difference and land use were selected and classfied for assessing the slope stability. Result indicated that the unstable region was 1186 km2, which occupies 69.32% of the total study area. 16 slope failure hazards and 29 debris flow gullies sited through field investigation were used to test the assessing results. And the testing data indicated that the assessing result of the study area was reasonable.
Numerical Simulation Analysis of Temperature Stress of Super-Long Steel Structure Plant
Authors: Ma Wei Hua , Meng Qing Juan , Liang Le Jie
Published: June 2012

Numerical simulate analyze a super-long steel plant with ANSYS,calculate the structure in expansion joint,without expansion joint and without long circle bore structure of these three kind situations,analyze temperature stress and vertical displacement of the main component when the temperature changes.Setting expansion joint can control the temperature stress in a small range,which is a widely used method at present.However,not setting expansion joint and the use of long hole structure connection can control the size of the temperature stress and ensure the structure globality,it can provide design basis of this method in engineering applications.
Research on Grid Generation
Authors: Liu Y. L. , Bai Y. , Zhao X.J. , Wei W.L. , Ma K.
Published: June 2012

A method for orthogonal grid generation is presented. The generating system is based on solution of a system of partial differential equations with finite difference discretization. The influence of the number of grid points, type of boundary, and intensity of the grid quality control function and grid properties are investigated. Specification of both boundary point distribution on all sides is used. The proposed method is applied to various test problems，which shows this method provides a good balance between controlling grid orthogonality and cell aspect ratio.
A Study of the General Method Used in Geotechnical Engineering Numerical Calculating Grid of CAD Graph Cutting
Authors: Liu Shang Wei , Wei Qun , Sun Kai
Published: June 2012

The author, based on the rock mass’ 3D modeling and solid graphics cutting method, advances a from-whole-to-part and from-part-to-whole rock cutting technology, which takes the rock faults and joint fissure of the original rock graphics as the geometric boundary, and takes the rock material division as mechanical control boundary. Being a carrier of grid, each basic rock’s geometry characteristics, topological relations (angle, edge, face, body, etc) and mechanical characteristics (e、μ、c、φ、κ, etc.) are all attached to the rock mass’s graphics. The relationship networks of every block are also stored. Such a collection of orderly and related graphical blocks provides the most basic and general database for all kinds of numerical calculations in geotechnical engineering. It can conveniently generate grid system according to different calculating requirements. After being exercised and examined in several projects, it is proved to have a good application prospect.