bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Water Absorption on Mechanical Properties of Kenaf and Kenaf Hybrid Polyester
Authors: Salleh Z. , Hyie Koay Mei , Berhan M.N. , Taib Yakub Md. , Nik Roselina N.R. , Razib A.R.M.
Published: December 2013

Natural fibre composite materials have been highlighted in recent years as they have the potential to mitigate the pollution and global warming. Kenaf is a high yield and fast growing plant. Kenaf does not require a lot of energy in production. Furthermore, the kenaf plant can absorb carbon dioxide when breathing. The objective of this paper is to relate the effect of different environment to the mechanical properties of kenaf and kenaf hybrid (fiberglass) polyester composites for 60 days period. Kenaf composite (containing 20 wt% of Kenaf fibres) and kenaf hybrid (containing 20 wt% kenaf fibre and 16 wt% fiberglass) were produced in cold press hand lay-up technique and then cured for 24 hours. The specimens were cut as required in EN ISO 527. The specimens were immersed in 3 different water sources, which were rain water, salt water and tap water. Tensile and hardness test were conducted to study the mechanical properties at 10, 20, 30, 40, 50 and 60 days. Both kenaf polyester and kenaf hybrid polyester show reduction on mechanical properties after immersion in the solutions. Kenaf polyester and kenaf hybrid polyester followed fickian behaviour after 40 days water immersion.
Seismic Damage of Suspended System in Lushan Earthquake
Authors: Wang Duo Zhi , Dai Jun Wu
Published: December 2013

The seismic damage of nonstructural system is severely, and has affect escaped from building and rescue. Suspending system is the typical one of the nonstructural system. This paper investigated the seismic damage of suspending system in Lushan earthquake. Suspending system of many buildings are failure, especially for the hospital and gymnasium which is used for disadvantaged group and rescue. Moreover, design of suspending systerm is lack of industrial standards, so much attention should be paid.
The Influence of Stress Drop on Synthesized Ground Motion
Authors: Tao Xia Xin , Liu Hai Ming
Published: December 2013

The stress drop during a earthquake is deal with by many papers, but has not been estimated very well yet at present. In order to study its influence on synthesized motion, the motions at two rock sites where records were obtained during the Wenchuan earthquake are synthesized by a hybrid source model from two stress drop values, 30 bar and 85 bars respectively. The result shows that the acceleration time histories, response spectra and mean peak values of motions from 85 bar are comparable to the records, but those of motions from 30 bar are much smaller than the records. It means that the way to inverse the regional parameters simultaneously from regional small quake records is acceptable.
The Stability of Ground Motions Randomly Synthesized for an Engineering Site
Authors: Liu Hai Ming , Tao Xiaxin , Wang Li Yuan
Published: December 2013

The ground motions at two rock stations where motions were recorded during the great Wenchuan earthquae are randomly synthsized for 10 times. The mean response spectrum and mean PGA of each synthesis and the general mean spectrum and PGA after each synthesis are calculated. The result shows the fact that the general mean spectrum after 10 syntheses, and the general mean PGA could be improved just a little. It means that it is not necessary to synthsize ground motion many times for an engineering site in practice, if the mean spectrum and PG are taken from the syntheses by 30 source models.
Research on Static Stress Triggering and Seismicity in Minxian and Adjacent Area, Gansu
Authors: Liu Fang Bin , Wang Ai Guo , Pang Wei
Published: December 2013

On July 22, 2013, an Ms6.6 earthquake occurred in Minxian-Zhangxian, Gansu Province, China, which caused serious damages. Based on Okada's elastic half-space model, we used thrust, strike-slip and thrust-strike as receiver faults respectively to calculate Coulomb stress changes (ΔCFS) of three moderate-strong earthquakes. The results show that the thrust and thrust-strike models are better. More than 90% of aftershocks located in NWW and SEE ,the stress increased areas, which is consistent with strike of Lintan-Tanchang fault (LTF). Therefore, Dieterich’s rate-friction law is used to simulate ΔCFS caused by the activity of the temporal evolution. It shows the seismicity of Minxian and adjacent area is the most frequent and that the distribution of earthquakes is perpendicular to the strike of LTF. The activity degrees vary for the LTF. Tanchang is the strongest, followed by the middle and western, and Minxian is the weakest. Except Minxian, the activities of all areas are above the background seismicity during 300 years and it will be up to the background for 400 years.
The Amplification Effect of Soft Site Based on Records from Borehole Arrays
Authors: Wang Liang , Wang Yun Long , Yuan Xiao Ming
Published: December 2013

Data recorded by borehole arrays with sensors installed at surface and geologic layers provide critical information for studies of local site amplification effects. The stations of KiK-net strong-motion seismograph network contain detailed information about the condition of site soil, we can judge the site categories according to these information. The stations have collected a large number of seismic records since operated. These seismic records can be downloaded free from the website of KiK-net if you are the register of the website. This paper select 30 sites-type III and 9 sites-type IV from KiK-net strong-motion seismograph network according to the China code for seismic design of buildings (GB50011-2010), and calculate Amplification Coefficient and Site Coefficient by seismic records from the selected stations. Using above information, this paper give their probability distribution and mean value.
Numerical Simulation Analysis on Seismic Behavior of Tow-Story Websteel
Authors: Ye Hong , Chen Yan Ping
Published: December 2013

The structural composition and construction of websteel structure system were introduced. And on this basis the building technique of finite element integrity model was provided with Ansys software. The horizontal displacement and the acceleration of structure under seismic load were analyzed. The result was shown that the inter-storey and top horizontal displacement and the acceleration were smaller than the code values of the tow-storey websteel building under earthquake.
Numerical Analysis on Seismic Behavior of RC Frame with Different In-Filled Panels
Authors: Zhou Xiao Hong
Published: December 2013

After an introduction of the involve type of panelfrictional in-filled panel (FIP for short), a finite element model has been built to research on the seismic behavior of RC frame with different panels (FIP and traditional in-filled panel, TIP for short). The Taft wave was chosen for further seismic analysis. Results show that the layout schemes of FIP have significant influence to the story drift and slight influence to the acceleration of RC frame. Compared with the TIP, the FIP have almost no stiffening and strengthening effect to the frame, and showed a certain degree of energy dissipation effects, which indicate a good applicability in engineering.
Study on Disaster Prevention Index System and Evaluation Method of Large Commercial Building
Authors: Song Bo , Li Liang , Zhang Peng
Published: December 2013

Based on a field survey about large commercial building in Beijing, some practical problems existing in the large commercial buildings are analyzed, a three-stage method (danger, transition and safety) for disaster prevention design was proposed in this paper, nine key indicators were selected to reflect the disaster prevention capability according to the analysis of disaster blocking, evacuation route and shelter. The analytic hierarchy process (AHP) and fuzzy comprehensive evaluation method were used to establish the weight coefficients and comprehensive evaluation model. Finally, we conducted an evaluation of the Dinghao and Xidan buildings, the results show that the Dinghao building is in the optimal level, Xidan building is in good level, the disaster prevention capacity of Xidan building should be further strengthened. The research result can provide a reference for disaster prevention design of large commercial building.
Applied Research of the Modifying Agent of Rubber Plastic Composite (MaR) in Asphalt Mixture
Authors: Zou Ling , Ne Jing Wei , Zhang Weng Gang
Published: December 2013

70# and 90# matrix asphalt mixture with MaR were studied through dynamic modulus test, rutting test, freeze-thaw splitting test, bending test to study the applicability of the Modifying agent of rubber plastic compound (MaR) in matrix asphalt mixture.Test results were Compared with SBSI-C modified asphalt mixture.The results indicate that: high-temperature stability of MaR+70# asphalt mixture is as well as SBSI-C modified asphalt mixture,and is bettere than MaR+90# asphalt mixture; water stability of MaR+90# asphalt mixture is bettere than SBSI-C modified asphalt mixture and MaR+70# asphalt mixture; low temperature performance of MaR+90# asphalt mixture is bettere than MaR+70# asphalt mixture, but is worse than modified asphalt mixture SBSI-C ; MaR+70# asphalt mixture can be first used in area of resisting high temperature and rutting, MaR+90# asphalt mixture can be used if the water stability performance and low temperature performance are considered.
Corrugated Board Flute-Shaped Finite Element Analysis and Optimization
Authors: Yuan Wei , Zhang Gai Mei , Liao Da Zhi , Liu Jing
Published: December 2013

UV-shaped corrugated cardboard Fusion V-shaped and U-shaped structure the advantages made, to make up for the lack of V-type and two U-shaped corrugated cardboard, the higher the compressive strength, good elasticity, is widely used UV type corrugated manufacturing corrugated board. But no strict standards for UV-shaped concrete structure of corrugated board size parameter corresponding corrugating roll no uniform size of the corrugated shape, in order to achieve the best elasticity and compressive strength. First, by mathematical methods, the corrugated structure is analyzed, and analysis to facilitate research, to select the 1/4 cycle corrugated. Create multiple vertical auxiliary line level is divided into 10 equal parts, to identify key points in shape between the V-shaped and U-shaped curve, connecting into multiple segments curve. Studied the actual thickness of the corrugated board of 3.8mm, a smaller thickness and therefore a straight line can be connected to each group of the resultant key points simplify the corrugated curve, model 1/4 of a cycle of UV-shaped corrugated first determined, using the symmetry of the model to establish a cycle, 300mm side length of the square created by one cycle of replication, about 38 of the corrugated board corrugated cycle. Use of finite element analysis in ANSYS corrugated structure, including a gradual transition to a simplified model of the 11 U-shaped flute-shaped corrugated cardboard from the V-shaped set of material properties, loads are cloth pressure, research corrugated cardboard stress and strain, i.e., the smaller the radius of curvature of the curve can be obtained along corrugated, the closer the U-shaped, corrugated board having a larger strain, i.e. has good flexibility, consistent with the empirical data to prove the feasibility of this analysis method.
Production and Properties of Mononuclear Microcapsules Encapsulating Cinnamon Oil by Complex Coacervation
Authors: Liu Wan Long , Xiao Zuo Bing , Zhu Guang Yong , Zhou Ru Jun , Wang Er Qin , Niu Yun Wei
Published: December 2013

The aim of present study was to prepare the mononuclear microcapsules containing cinnamon oil (CO) using a complex coacervation method with gelatin and pectin as wall material. The surface morphology of microcapsule was characterized by optical microscopy and scanning electron microscopy (SEM). Then the microcapsules were analyzed by thermogravimetric analyzer (TGA) to confirm the cinnamon oil had been successfully embedded into the microcapsules and determine the loading capacity. The results showed that the microcapsules were uniform in size, spherical with a mean size of 13.6 ± 4.8μm. The microencapsulation yield, loading capacity and encapsulation efficiency were 65.4±3.3%, 43.3±1.3% and 42.4±1.7%, respectively.
Preparation of the Al2O3/3Y-TZP Ceramics by Microwave Sintering under Low Temperature
Authors: Luo Jun Ming , Xu Ji Lin , Zuo Hong Yan , Huang Jun
Published: December 2013

Nanometer Al2O3/3Y-TZP powders were prepared by coprecipitation process and the Al2O3/3Y-TZP ceramics were prepared by microwave sintering under relatively low temperature. The relative density, bending strength and fracture toughness of the Al2O3/3Y-TZP ceramic samples were studied. The results showed that the Al2O3/3Y-TZP powders exhibited fine and homogeneous near-spherical particles with the size of 40-60 nm. With increasing the sintering temperatures, all of the relative density, bending strength and fracture toughness of the ceramic samples increased firstly, reaching the maximum values of 99.1%, 1236 MPa and 10.89 MPa·m1/2at 1250 °C respectively, and then decreased.
Research on Grain Refinement Effect of Al-5Ti-C Alloy on Pure Aluminum and its Attenuation Mechanism
Authors: Ding Wan Wu , Xia Tian Dong , Zhu Jiang Tao , Zhao Wen Jun , Xu Yang Tao
Published: December 2013

The texture feature and grain refinement effect of Al-5Ti-C alloy on pure aluminum were analyzed and its attenuation mechanism was discussed by using X-ray diffraction (XRD), scanning electron microscopy (SEM), optical microscopy (OM) and other experimental methods.The results show that: Al-5Ti-C alloy is composed of Al, TiAl3 and TiC. Al-5Ti-C alloy has a good grain refining capacity for commercially pure aluminum. During the heat preservation process, due to precipitation of titanium compound in the aluminum melt, refinement effect of Al-Ti-C alloy is declined.
Effect of Multiple Gas Media Package on Preservation of Fresh Sweet Corn at Room Temperature
Authors: Meng Jian Qing , Jia Xiao Yu , Yang Wei Qiao , Li Xi Hong
Published: December 2013

Effects of different methods of gas package on freshness of harvested fresh Sweet Corn, at room temperature in its shelf life were investigated. The harvested fresh Sweet Corn were packaged under vacuum, air, N2 or CO2, respectively, and then stored 90 days at 30°Cafter the high temperature sterilization. After the sterilization and during storage, the changes of aerobic plate count, water content, soluble sugar content, and TPA were determined. The results showed that compared with others, the package with N2 could inhibit the growth of microorganisms, kept the content of water, soluble sugar and fat. After 90 days, TPA showed that the package in nitrogen could improve the quality of sweet corns.
Study on Metal Transfer and Welding Spatter Characteristics of Basic Flux Cored Wire
Authors: Wang Yong , Zhang Ying Qiao , Wang Bao , Wang Zhi Jun
Published: December 2013

The metal transfer behaviors of basic flux cored wire at different arc voltage and welding current and the resultant welding spatter were investigated by using a high speed camera. Two modes of metal transfer are found: globular repelled transfer (lower welding parameters) and small droplet transfer (higher welding parameters). The former is accompanied by large granular spatter, large droplet itself explosion spatter and electric explosive spatter of short-circuit, and spatter in the latter is reduced obviously. But if the slag column is found in the two models, spatter could be dropped evidently owing to its significant guiding role for metal transfer. Therefore the slag column is the key factor of reducing welding spatter.
Study on the Preparation of Rich Hydrocarbon Bio-Diesel from Cornus wilsoniana Vegetable Oil with High Temperature Catalytic Cracking
Authors: Zhang Hong Qin , Zhang Yu Jun , Zhang Ai Hua , Li Chang Zhu , Jiang Wei Wei , Xiao Zhi Hong
Published: December 2013

Based on pretreatment of Cornus wilsoniana vegetable oil,and adopting the method of high temperature catalytic cracking to preparating of rich hydrocarbon bio-diesel. Cornus Wilsoniana vegetable oil was as the raw oil,the process of high temperature catalytic cracking was dwascussed,by the catalyst types and percentage, heating current and the influence of reaction time.The more ideal response condition was:The best catalyst was KF/CaO (40%,roast 4 h); The best catalyst percentage was 0.1%;the best heating current was 3.2 A; The best reaction time was 40 min;The yield of liquid was 82%;The response rate was 92%. The preparation of bio-diesel was similar to 0 # diesel.
Microwave-Assisted Secondary Synthesis of NaA Zeolite Membranes Grown on ZrO2 Substrate
Authors: Cheng Zhi Lin , Qin Xi Xi
Published: December 2013

The highly intergrown NaA zeolite membranes on seeded ZrO2substrate were synthesized by microwave heating method. The preparation of seeds with the size of ca.60nm employed the vapor phase transformation method (VPT). The XRD patterns indicated that the pure NaA zeolite membranes formed on the seeded ZrO2substrate for varied synthesis times. However, the peak intensity of NaA zeolite membrane after 50min obviously decreased, suggesting that the NaA membrane could take place the dissolution at that time. The SEM images indicated that the NaA zeolite membranes for 15-30min had a good integrity and consisted of highly intergrown zeolite crystals, but the NaA membrane after 50min appeared some large defects, further verifying the result of XRD pattern. The gas permeability showed that the H2/N2and H2/C3H8permselectivities on zeolite membrane attained 4.01 and 8.13, respectively, higher than those of the corresponding Knudsen diffusion. These results suggested that the diffusion of gases, at least in part, are affected by the pore size of zeolite and the function of molecular sieving can be embodied on the synthesized membrane.
Study on Collaborative Learning System Design Based on Web Platform
Authors: Nan Yang
Published: December 2013

The integration of Web technology to build collaborative learning environment, and systems analysis of Web technology to support collaborative learning theory, technical infrastructure, integration of Web and the advantages of collaborative learning is proposed mode of Web technology and collaborative learning environment architecture model. Finally, Google cloud computing applications - GoogleApp Engine and Google Apps interpreted as an instance of the Web and cloud computing technology is how to integrate, as well as collaborative learning environment integrated collaborative learning environment, as compared with the traditional strengths lie, and given based on Google Apps web collaborative learning strategies. Web2.0 and demonstrated the feasibility of integrating cloud computing technology, technical support for future research to broaden the thinking and learning.
An Improved Iteration Back Projection Imaging Technique for Surface Penetrating Radar Applications
Authors: Lei Wen Tai , Shi Yu Jia
Published: December 2013

Traditional back projection(BP) imaging algorithm can be used to obtain 2-dimensional subsurface imaging results of testing materials and thus provide useful information for material nondestructive testing(NDT). But it’s restricted by heavy computation burden and cannot be widely used in surface penetrating radar(SPR) NDT area. To meet the needs of high resolution imaging and low computation burden, an improved iteration back projection imaging algorithm is presented. With the multi scale iteration processing and local maximum extraction method, it can get appropriate resolution imaging results with much lower computation. The simulation of this algorithm is processed and experimental results validate the feasibility of this algorithm.
Multi-Level Automotive Service Performance Evaluation Model
Authors: Yu Guo Xin , Fang Ji Chen , Zhou Ya Mei , Zhang Qiang
Published: December 2013

A multi-level model automotive service performance evaluation model was established based on the servicer-core automotive service network model was proposed. The model was divided into three interrelated levels: the business level, the process level, the learning and development level, respectively used to evaluate business conditions, operating process and development potential of the object. A fuzzy AHP evaluation model for automotive supply chain collaboration performance evaluation was established. A case study was used to show the feasibility of this evaluation model. The results show that, supply chain collaboration performance result of the object was slightly lower than the regional average. Services of the object had unbalanced development and some indicators had great room for improvement.
Manufacturing Industry Structure and Export-Import Development of Chinese (2007-2012)
Authors: Liu Bo Nan
Published: December 2013

The national partner countries through international trade on manufacturing engineering and engineering technology advances have different degrees of impact, the paper analyzes the development of China's manufacturing variations and export trade, and then from theory to explain the import, export trade on TFP the impact mechanism. Finally, this industry grouping, according to manufacturing industry technical standards, industry size compared regression results are grouped reasons for the differences. Empirical analysis based on the main conclusions drawn papers and put forward relevant policy recommendations.
Research on Effects of Positioning Ways on the Strength of Port Plate in Axial Piston Motor
Authors: Shi Jin Yan
Published: December 2013

Port plate is one of the key parts in axial piston motor. The main researching object of this paper is the port plate of axial piston motor. According to different positioning ways of the port plate, the strength of port plate is calculated by the finite element software ANSYS. From the results of the analysis, certain suggestions are also provided to help further positioning ways design of the port plate of axial piston motor.
Study on the Characteristics of the Flow Resistance of the Mixed Plate Heat Exchanger
Authors: Tong Zheng Ming , Xie Fei , Qin Gui Hua , Tao Xiao Gang
Published: December 2013

BR0.3 type plate heat exchanger was used for the experiment. Through the test platform of plate heat exchanger, a large number of experiments have been done in different mixed mode but the same passageway. By the linear fitting method and the analysis of the data, the formula of flow resistance which fit at any mixed mode is obtained, it solves the problem of calculating flow resistance and has a great help for engineering calculation.
Influences of the Compliances and the Resistance on Pulsatile Flow Waveforms
Authors: He Wen Bo , Wang Yuan , Gong Xiao Yan
Published: December 2013

A pulsatile circulation system has been built to simulate aortic blood flow. The system has both upstream and downstream compliances and resistances to simulate the elasticity and resistances of blood circulation system. Influences of the compliances and resistances on the pulsatile pressure waveforms have been systematically studied using this system. We found that in absence of the compliances and the downstream resistance, it results in an oversize negative pulsation to the pressure waveforms. The downstream resistance hardly affects the structure of the pressure waveforms, whereas the mean amplitude of pressure increases along with the downstream resistance. The compliance can reduce the peak value of the pressure, which is unrelated to the location of the compliance but related to the elasticity in the system. With fixed upstream system elasticity, the pressure waveform is more stable.
Numerical Simulation of the Effect of the Uneven Wall on the Liquid Film Flow
Authors: Liu Mei , Zhu Yongxin , Wang Song Ling
Published: December 2013

Two-dimensional models of inclined flat and corrugated walls are established based on VOF method to numerically simulate the flow characteristics of liquid film. The impact of wall structures on the wave profile of the film is studied. The results indicate that the wall structure plays an important role on the liquid film, there are vortexes generated on the trough of wavy wall, the vortex has the "rolling" effect in machinery, which reduces the viscous resistance. and continuous film is easier to form on the wall whose corrugated size is smaller.
Understanding Regular Waves Effect on Ship by Numerical Wave Tank Simulation
Authors: Fan Shaotao , Zhao Cheng Bi , Tang You Hong
Published: December 2013

This study establishes three-dimensional numerical wave tank based on the theory of viscous flow to simulate the unsteady motion response of a Wigley advancing in regular heading waves. The governing equations, Reynolds Averaged Navier-Stokes and continuity equations are discretized by finite volume method, a Reynolds-averaged NavierStokes solver is employed to predict the motions of ship, and volume of fluid method is adopted to capture the nonlinear free surface by writing user-defined functions. The outgoing waves are dissipated inside an artificial damping zone located at the rear part (about 1-2 wave lengths) of the wave tank. The numerical simulation results are compared with theoretical and experimental data from Delft University of Technology, and show good agreement with them. This research can be used to further analyze and predict hydrodynamic performance of ship and marine floating structures in waves and help to extend the applications of numerical wave tank.
Numerical Simulation of Magnetostriction-Induced Cavitation Flow
Authors: Xia Dong Sheng , Yu Yan , Zhang Hui Chen
Published: December 2013

The magnetostriction-induced cavitation flow was numerically simulated by using a full cavitation model with the SSTk-ωturbulence model and the dynamic mesh technique. The characteristics of ultrasonic cavitation flow and the cavitation erosion mechanism were revealed. The computational results show that the pressure fluctuation possesses the characteristics of pulse on the specimen. Intense pressure pluses and cavitation occur in the local flow adjacent to the specimen. As numerous bubbles collapse, intense pressure pulses form on the specimen. Cavitation intensity is serious at the center while it is slight at the edge. The pressure pulse and the vapor volumn fraction with the equal magnitude symmetrically distribute around the center, meaning that cavitatin erosion appears a symmetrical pattern around the center. The effective pressure fluctuation occurs in the local flow field within the distance of one third of the wave length to the specimen. It is validated that the wave energy dissipates very fast in the magnetostriction-induced cavitation flow.
A Method for Aerodynamic Characteristic Analysis of Hypersonic Aircraft Based on Response Surface Model
Authors: Yang Jie , Wu Song Ping , Hou Wen Xin
Published: December 2013

Aerodynamic characteristic analysis of hypersonic cruise aircraft is more difficult than that of conventional aircraft, for the complex flow field simulation and inadequate amount of results under limited flight conditions. In this paper, numerical schemes applicable for hypersonic flow field are adopted to acquire a set of aerodynamic characteristics of a typical hypersonic cruise aircraft as sample data, based on which response surface models (RSM) are constructed to provide approximation of aerodynamic characteristics under any flight conditions within the design domain, finally the overall approximation performance of the response surface models are analyzed.
A Numerical Investigation on Hydrodynamics of Multiple Floating Bodies in Offshore Installation Engineering
Authors: Zhang Zuo Yong , Sun Li Ping
Published: December 2013

There are many applications in marine engineering where two or more floating vessels are in close proximity. Probably the most significant one is related to the offshore installation engineering. On the background of the upper module installation operation of spar platform, this paper investigates the hydrodynamic interaction effects of multiple floating bodies in offshore installation engineering. The numerical simulation bases on the 3-D frequency domain linear potential theory. The calculations are carried out for the crane ship, the transport ship and the spar platform. Finally the best environmental parameters and the relative position of floating bodies are selected, which can provide good advice on installation operation scheme design.
Mechanical Analysis and Strength Evaluation of KEY COMPONENTS Tripod of SNUBBING UNIT
Authors: Luo Min , Li Fa Cheng , Zhao Ting Ting , Xu Ting Ting , Liu Jiu Bao , Zhao Wen Xin
Published: December 2013

Tripod is the key components of snubbing unit, its strength directly affect the normal work of snubbing unit. Considering the structure and force characteristics of key components tripod of snubbing unit, three-dimensional finite element analysis model of tripod is established. By using the finite element method, mechanical analysis of tripod is conducted and safety evaluation is finished by adopting the stress classification and introducing analysis design standard of pressure vessel. The results show that key components tripod of snubbing unit are safe and reliable under the maximum lifting force and the maximum downward force. It provides theory evidence for snubbing unit design. The safety evaluation method provides effective evaluation methods for complex structure strength evaluation.
Simulation of Red Particles in Blood Cell
Authors: Jahangir Alam S.M. , Hu Guo Qing , Yu Ling Ke
Published: December 2013

Red blood cell (RBC) particle detection and counting with characteristics in blood cell systems has been done by computer simulation. A simulation region, including plasma, red blood cells (RBCs) and platelets, was modeled by an assembly of discrete particles. The proposed method has detected the red particle from blood cell systems through different simulations of MATLAB and GAMBIT & FLUENT. After the detection, the number of red particles in a sampled cell has been counted and the characteristics about the red particles for analyzing the Birth-Death growth of each red particle have been found.
The Fitness Characteristics of Elite Female Skaters and Regression Analysis
Authors: Mu Xiao Gang , Xia Jiao Yang
Published: December 2013

With the method of ISOMED isokinetic testing system, INBODY 3.0 body composition analyzer and ADIPOMETER subcutaneous fat measuring instrument, this study tries to measure the fitness characteristics of female athletes and then apply mathematical statistics to complete a regression analysis with their results. The main conclusions are as follows: 1. 480°/s hip extensor480°/s knee extensor and 240°/s radios of knee flexor-extensor are highly negative correlated with 500m results, and the regression equation is y = 20.496 - 0.72x1 - 0.64x2 - 0.82x3. 2. Results of the body composition and subcutaneous fat are not highly correlated with 500m result. The hip flexor and extensor at three angular speeds are highly negative correlated with subcutaneous fat of abdomen, upper knee and back, but are highly positive correlated with weight, FFM, BMI and BMR. 3. According to the testing results of body composition, there is no significant difference between two groups, both up to the standard of Asia and world. The maximum value of subcutaneous fat is in abdomen and for another is in upper knees. The minimum value of subcutaneous fat is in outer thigh for long distance athletes and in back for short distance athletes, no significant difference.
Study on Structure Analysis and Control of the Underwater LED Lamp Capable of Changing Brightness
Authors: Choi Hyeung Sik , Kim Yun Hae , Ha Ji Hoon , Son Hyunjoong
Published: December 2013

The aim of this study is to analyze the structure of underwater lights and control these fixtures that enable controlling light emitted from lamps used in unmanned underwater robots or underwater operation in the dark depths of the ocean. The study performed buckling analysis of cylinder of the waterproof underwater lamps operable in the deep ocean, and devised control system that regulates the distance between lens and LED light source. Controllability of light diffusion underwater is verified in the control experiment of underwater lamps manufactured in this study.
Monopole-Gear Design Based on Neural Network and Modified Particle Swarm Optimization
Authors: Fang Hai Rong
Published: December 2013

In order to raise the design efficiency and get the most excellent design effect, this paper combined Particle Swarm Optimization (PSO) algorithm and put forward a new kind of neural network, which based on PSO algorithm, and the implementing framework of PSO and NARMA model. It gives the basic theory, steps and algorithm; The test results show that rapid global convergence and reached the lesser mean square error MSE) when compared with Genetic Algorithm, Simulated Annealing Algorithm, the BP algorithm with momentum term.
The Influences of New Paper Surface Efficiency on Printing Quality
Authors: Yang Yong Gang , Gao Qiao Zhuo , Liu Quan Xiao
Published: December 2013

Paper surface efficiency (PSE), a paper property integrating gloss and absorbency, can be used to evaluate color reproduction after the interaction of paper and ink. But it was shown that the color reproduction was still related to paper whiteness in practice. In this paper, an assumed PSE formula which integrates gloss, whiteness and ink absorbency is firstly presented, and according to experimental data, it can be well forecasted that the change of these principal paper properties would affect color reproduction result via the new PSE formula. The linear relationships between new PSE formula and ink color reproduction based the description of photo-density measurement were studied subsequently. The results showed that new PSE formula can be used to predict effectively ink color effect.
Simulation of Primary Fracture Propagation around Compressive Cavity with the Extended Finite Element Method
Authors: Su Kai , Zhang Zhi Min
Published: December 2013

The fracture distribution around circular cavities has been widely observed in experiments and well documented in literature from 1980. Most of the works are based on experiments’ results, which cost considerable time and money. With varied numerical methods developed more and more researcher employ numerical experiments on computers instead of physical experiments. Firstly, the nodal enrichment functions for Extended Finite Element Method in conjunction with additional degrees are presented. Moreover, we describe the cohesive segments method, which is followed by the damage initiation and evolution laws. In the last a borehole numerical model is built up and the simulation results of the primary fracture propagation are presented.
Research on Stability of the Rock-Socketed Piles in a Landslide Control Project
Authors: Deng Yong Liang , Lu Ying , Li Qi Ming , An Kang , Niu Shuai
Published: December 2013

In order to study the stability of rock-socketed piles in landslide control project, this paper took a practical engineering as example, employed the ANASYS software platform as the implementation tool to establish the finite element analysis model. In this analysis, the Drucker-Prager criterion was selected and several differentiated models were established to research the influence of different socketed depth on rock stability. The result indicates that when the embedding depth is constant, the deformation of rock is growing with the increasing of load. When entering into the plastic response, the crack eventually developed into plastic zone around the rock-socketed pile; the adverse effects of the bottom rock would be smaller complying with the deeper of the pillar embedding into the rock; the cost increases with depth of embedded part in practical engineering, according to this research, it is economical and reasonable to choose triple pile diameter as the embedded depth.
Approximate Analytical Method of Load-Settlement Relation for Composite Foundation with Lateral Restriction
Authors: Tang Xi Ya , Liu Jie , He Jie , Xie Qun Dan
Published: December 2013

Considering reinforcement zone and natural foundation as a whole, the displacement component formulas satisfy with the displacement boundary conditions were constructed based on some hypotheses. Considering friction influence under foundation, a approximate analytical algorithm of foundation deformation was established under embankment loads by the variational method of displacement, and the approximate analytical formula on the relationship between the load and the average settlement was derived. The static load model tests were carried out in laboratory to verify the feasibility of this method proposed in this paper.
Key words: load-settlement relation; variational method of displacement; embankment load; composite foundation
A Method to Determine Pre-Consolidation Pressure of Soft Soil in Dongting Lake Area
Authors: Zhang Jun Hui , He Jun , Lin Jie Feng , Zheng Jian Long
Published: December 2013

The advantages and disadvantages of the existing mathematical models to determine soft soil pre-consolidation pressure were compared. Based on the practical shape ofe-logPcurve, it is discovered that the Harris model is more fit to thee-lgPcurve of soft soil in Dongting Lake area than the traditional cubic or quartic polynomial models. Besides, it avoids the impact of human subjectivity of Casagrande method effectively. Consequently, the Harris model was finally selected to calculate the pre-consolidation pressure of soft soil in Dongting Lake area by numerical method.
Design of Flat Ends in Pressure Boilers with Circular and Elliptical Stress Relieve Grooves
Authors: Szybiński Bogdan
Published: December 2013

Flat ends in cylindrical pressure vessels are a certain alternative for commonly used in boilers dished ends. These ends can have different form and one of the admitted proposals is the plate with the internally introduced circumferential stress relief groove. In codes [1, the grooves of circular shape are recommended. Three parameters describe the groove configuration, namely the groove radius, the minimum endplate thickness under the relief groove and the chamfer angle. The respective formulas for calculations of the first two parameters are expressed in the form of inequalities. This means that a certain range of their variation is possible. The existing codes do not give the clear suggestion about the optimal choice of values of the groove parameters, leading to the minimal value of the stress concentration in the groove area. This is usually done by numerical analysis. The significant reduction of stress concentration is observed when changing the shape of the groove from the circular to the elliptical one, which is also shown in the paper.
Further Debate about Visual Design Methods for Pile Foundation
Authors: Zou Sheng Feng , Zhang Jing Yu , Wang Shi Ji , Han Yi , Wang Chuan
Published: December 2013

The computing of end-bearing capacity of pile has vital significances for foundation design while the foundations analysis is usually problematic due to those diverse soils and engineering conditions. Though various CPT-based methods which have already been applied in numerous huge engineering practices are available for the analysis of pile foundation bearing capacity home and abroad, there still seemed lacking legitimate guidance assisting to select these formulations quite effectively. In this paper, five CPT-based design methods are compared in deep, the realization through computer program is also presented, with the capacity data accumulated from pile engineering coming into mind, we are on the way to making designers choose better methods during the designing process.
The Grouting Diffusion Model of Power-Law Fluid in Single Fracture
Authors: Zhang Wei
Published: December 2013

Based on the Hele-Shaw smooth flat model, the theoretical model of the diffusion radius-time relationship of the power-law fluid in single fracture plate model can be deduced according to the force balance of fluid micro element in cylindrical coordinate, the rheological equation of power-law fluid and the equation of mass conservation. The calculation procedures of the derived theoretical model are compiled by applying the Matlab software, and are employed to analyze the affecting elements of diffusion. The results show that the slurry diffusion radius is widened with the increase of the fracture apertures, the grouting pressure difference and the grouting time; and the bigger the water cement ratio, the easier the grouting spreads under the equivalent fracture opening conditions. The grouting infection efficiency in the early stage is much higher than that of the later stage, and reduces with the increase of the diffusion radius, which is in accord with the rule of the grouting in practice. The Grouting Diffusion Model will serve as a theoretical basis for the cement grout with low water cement ration in the fractured rock.
Numerical Simulation on the Stress Characteristics of Prestressed Retaining Wall
Authors: Wu Jian Qing , Zhang Hong Bo , Song Xiu Guang , Yu Yi Fan , Li Chao
Published: December 2013

With the highway subgrade fill increasing, traditional retaining wall cannot meet the requirements for supporting. To meet this requirement, the prestressed opposite-pull retaining wall was put forward. Due to the anchor pull of the new-style retaining wall, its bearing capacity was enhanced, but the stress is not clear. In order to reveal the stress distribution of the prestressed opposite-pull retaining wall, FLAC3D was adept to do numerical simulation on the new-style retaining wall. It simulated three conditions of the wall with no anchor, with anchor but without prestress and with prestressed anchor. The results showed that, after the layout of prestressed anchor, the lateral earth pressure of the region near the anchor increased with the increase of prestress, the lateral earth pressure of the wall is parabola distribution. The lateral earth pressure was larger than that of the wall with no anchor and with anchor but without prestress. The bearing capacity of the retaining wall was effectively improved.
Theoretical and Experimental Research on Joint Slippage Effects of Lattice Angle Steel Tower
Authors: Wang Zhang Qi , Song Ze Ming , Jiang Wen Qiang
Published: December 2013

In lattice angle steel transmission tower, as the bolt diameter is small and member connection is relatively thin, lower clamping force is commonly used in bolted joint. It is common in lattice tower during full tower tests, joint slippage occur even under design load. However, traditionally trussed beam hybrid finite element model without explicitly considering slippage effects has been widely used in the analysis of the tower. In this paper, the HD-1 tower was experimentally studied under various static load cases, and several numerical models with including joint eccentricity and slippage are established. After comparing the theoretical analysis results and the experimental results, the following conclusions are presented: joint eccentricity almost has not effects on leg member axial force; Among all the studied load cases, joint slippage effects the leg member force most under torsional condition than the other load conditions; Numerical model with including joint slippage effects yield much better axial force results in leg member compared with experimental test results.
Optimization of Sonic Boom Suppression by Off-Body Energy Deposition
Authors: Feng Xiao Qiang , Li Zhan Ke , Sang Jian Hua , Song Bi Feng
Published: December 2013

Sonic boom suppression method is the key technology of next generation supersonic aircraft. Low boom mechanism of the off-body energy deposition is analyzed by using the thermal chocking model. The mass flux of energy deposition region is small than no energy deposition region, and off-body energy deposition will induce a bow shock wave. The mechanism of off body energy deposition is similar with quiet spike, so it can be regard as a virtual quiet spike. Off-body energy deposition analysis software is developed based on CFD, waveform parameter method and NSGA-II genetic algorithm. The location coordinate, value, shape and location number of energy deposition are the key parameters in low boom design. Initial pressure of optimized energy deposition decrease near about 54.65 than no energy deposition, and rise time increase 543.2%.
Numerical Study on the Influence of Sleeve-Rib Space on the Static Response of Grouting-Sleeve Reinforcement-Connection Component
Authors: Gu Fan , Wu Tao Gao , Zhao Wei Jian , Dui Xin , Zhang Peng
Published: December 2013

According to the actual structure of grouting sleeve, the ABAQUS finite element model of grouting-sleeve reinforcement-connection component was established. By changing sleeve-rib space, the influence of sleeve-rib space on the stress and the displacement distribution at grouting material were gotten. Numerical simulation shows that with the decrease of sleeve-rib space, the internal force distribution of grouting material tends to be uniform. Under axial tension load, with the sleeve-rib space of 14mm, the maximum stress of grouting material is lower than its strength, which makes grouting-sleeve reinforcement-connection component to be in a stable work condition.
Comfortable Evaluation of Bridge-Station Combined Large Span High Speed Railway Station under High Speed Train Load
Authors: Yu Yan Li , He Wei
Published: December 2013

Focusing on the Zhengzhou East Railway Station, which is the larges railway staton in China at present and has the characteristics of bridge-station combined structure. The vibration responses of waiting room floor and business floor caused by high speed train loads are measured and calculated. Then the vibration comfort was evaluated by the code of ATC (1999). The calculation and analysis results showed that: (1) the vibration of waiting floor and business floor under crowd get up loading is small, which can satisfy the comfort demand; (2) the vibration of waiting floor and business floor under high speed train load is bigger because the waiting floor and business floor is more flexible; (3) the vibration comfort under high speed train load can satisfy the demand of relevant code.
Research on Analytic Calculation Method of the Dynamic Response of Buried Pipelines under Indirect Ground Shock
Authors: Xu Guo Fu , Deng Zheng Dong , Ji Chong , Jia Jing Jing
Published: December 2013

Buried pipelines are important lifeline engineering. During war conventional weapons blasting in the air would induce indirect ground shock, and the shock to the buried pipeline can lead to the paralyzed of urban economic and social function. And the numerical simulation of the dynamic damage of buried pipeline is complicated and time consuming, so this article using the equivalent static load method proposes analytic solution method of stress calculation of buried pipeline under ground shock. Through comparing the results calculated by analytic solution method and numerical solution, it shows that the analytical solution is feasible in engineering application.
Stochastic Imperfection Mode Superposition Method for Stability Analysis of Lattice Domes
Authors: Liu Hui Juan , Yang Lu Feng , Li Yan Lei
Published: December 2013

Based on geometrically nonlinear FEM, combined with stochastic imperfection mode, the stochastic imperfection mode superposition method was proposed for domes. Using the method the least favorable distribution of imperfection can be found and the corresponding critical buckling load of the structure can be calculated. Moreover the process of the structure with the load increment can be tracked. Finally the example demonstrated effectiveness of the method in finding the least favorable distribution of imperfection and the critical buckling load.