bluuebunny/crossref_metadata_2025 huggingface dataset:
CFD Study on Inner Fluid Flow of Novel Hydrocyclone
Authors: Song Ruo Feng , Yang Yong Teng , Zhao Lei , Fang Fang
Published: June 2013

Hydrocyclone has been increasingly used in mineral, food and chemical industrial processes as common solid-liquid separation equipment. Small-sized hydrocyclone is generally applied to separate fine particle which is hard to separate by conventional sized hydrocyclone. However, the separation efficiency could be reduced due to the limitations of inlet width and capacity in this case. A novel impeller hydrocyclone is designed to solve this problem, and the influences of impeller on inner fluid flow rate have been discussed by simulating fluid flow patterns using a common CFD software, FLUENT. The results show that increasing the speed of rotating blade section is an effective way to improve the particle separation efficiency due to the increase in centrifugal force.
Power Quality Monitoring System Based on LabVIEW
Authors: Xu Rui Lin , Liu Yu , Xu Xin , He Jian Jun
Published: June 2013

This paper analyzes the power quality measuring principles according to the national power quality indicator. And a power quality monitoring system based on LabVIEW has been designed. Five indexes are introduced simply in the paper. They are voltage deviation, frequency deviation, three-phase unbalance degree, power harmonic and voltage fluctuation and flicker. Virtual instrument technology is used in the system. Through the combination of software and hardware and with the help of software simulation, the system gets signal data and analyses the power quality. The main program interface has been shown. Simulation showed that the system is feasible. Compared with the traditional instruments, the system has a friendly man-machine interface and strong processing capacity. It can be operated simply and extended conveniently.
Harmonic Gear Reducer Transmission Error Analysis and Detection
Authors: Tong Qing Bin , Jiao Chao Qun , Ning Tao , Zhang Xiao Dong
Published: June 2013

Harmonic gear reducer is the key component of the electric servo system, its transmission error analysis and testing play a crucial role in the development, production, testing, assembly of gear reducer. According to the thin shell elastics deformation theory, the harmonic transmission principle is analyzed, and the harmonic transmission error sources. The calculation of transmission error is further discussed; the transmission error formula of harmonic gear reducer considering the case of gear backlash and stiffness is given. A harmonic gear reducer transmission error testing system is designed. This system can achieve the detection for the static and dynamic transmission error of harmonic gear reducer, the accuracy of measuring angular is batter than .
Anode Buffer Layer of Organic Solar Cells and Recent Developments
Authors: Ran Xiao , Wai Ng Tsz , Liang Xiu Juan
Published: June 2013

Stability and efficiency have drawn much attention in research area. Buffer layers are inserted between the anode electrode (typically ITO) and active layer to obtain better performance. In this article development of different categories of materials as anode buffer layer and their possible mechanisms are reviewed.
The Use of Recycled Aggregates in Continuously Reinforced Concrete Pavements (CRCP)
Authors: de Backer Hans
Published: June 2013

The use of recycled aggregates in concrete has increased in recent decades. Increasing scarcity of natural aggregates and the growing ecological importance promote this evolution. The first test section in Belgium of a two-layer continuously reinforced concrete pavement (CRCP) with recycled aggregates in the substrate layer was built on the highway E34/N49 in 2007. Horizontal cracking at the level of the reinforcement showed up after only a few years. This is a problem which was never seen before in CRCP and was probably due to the use of recycled aggregates. Therefore it is important to understand the impact of recycled aggregates on concrete. Recycled aggregates are a two-component material consisting of natural aggregates and adhering mortar. The adhering mortar is more porous than the rock particles which insures a higher water absorption and lower density. In addition, they have a lower abrasion loss in the Los Angeles-test and less resistance against weather and temperature changes. This is due to, respectively, the less strong mortar content, and the large pores of recycled granulates. A first cause of horizontal cracking can be found in the results of high drying shrinkage, high creep and low modulus of elasticity. These properties insure larger tensions in the concrete layer. In combination with a lower tensile strength it is a possible cause for the horizontal cracking. In addition, the paper reports on laboratory testing concerning the properties of concrete with recycled aggregates and discusses an alternative method to determine the concrete mixture which takes the influence of the adhering mortar into account.
Natural Frequency and Vibration Modal Analysis of Composite Laminated Plate
Authors: Zhao Long Sheng , Wu Jin Wu
Published: June 2013

In this paper,a layer-wise theory is used to analyze the natural frequency and vibration modal of the composite laminated plate. Layer-wise theory assumes that displacement is continue through thickness direction and has good accuracy to analyze free vibration. The frequency and vibration modal are acquired while building the equation of motion according to layer-wise theory. Through comparing layer-wise theory and other theories, numerical results show that layer-wise theory is credible to analyze composite laminated plate. At the same time, experiment is used in this paper to acquire the natural frequencies and vibration modal of a simply supported composite laminated plate. Lastly, combination of the theory method and experiment method canprobably predict the natural frequencies and vibration modal.
Study on NURBS Surface Tool Trajectory Planning of 6R Engraving Robot
Authors: Zuo Yu Hu
Published: June 2013

A NURBS surface tool trajectory planning method of engraving robot is proposed. The calculation algorithm including NURBS surface tool trajectory, cutting point and effective cutting radius of end milling cutter and inverse kinematics transform is discussed in detail using Taylor and coordinate transformation method. It is the foundation to further applied to the engraving robot tool trajectory planning or off-line programming.
The Government Subsidy Research of New Energy Sedan Industry Based on the Consumer Demand
Authors: Wang Ying , Ling Jin , Xiao Kan , Jia Hong Guang , Li Zheng Hua
Published: June 2013

In recent years, with the double pressure of energy crisis and environmental pollution, the development of new energy vehicles has become China's emerging strategic industry. In order to promote the development of new energy sedans, it is important to study the government subsidy of new energy sedan industry based on the consumer demand. This article firstly elaborates the government support experience of new energy sedan industry in foreign countries. Secondly, we demonstrate the necessity of government policy subsidy. Thirdly, we analyze the economy of new energy sedans based on the consumer demand. Then we make further analysis on the economy of new energy sedans according to the fuel price and the change of technical cost. Finally, we analyze the data, and put forward the government subsidy to promote the development of new energy sedans based on the consumer demand.
An Application Study of DPSSL Multi-Line Scanning on Teeth Model
Authors: Wang Chia Ching , Hu Po Chi , Tsai Chung Li , Chen Sung Long
Published: June 2013

A dental scanning system was developed using multiple light strips of DPSSL (Diode-Pumped Solid-State Laser) sources with a video capturing module of one CMOS camera. The laser line scanning method is less sensitive to the surface conditions of the materials for measurement compared with the structured light scanning method, and a multi-lines scanning design is used to improve the scanning efficiency. The study uses DPSSL lines to scan over the teeth models either by sequence or by sections, which determines the actual time spent. For an object within 100x100mm projective area, the scanning time is about 10 minutes with ±0.05 mm accuracy on a gypsum teeth model using sequential scanning. The results show high accuracy and efficiency scanning teeth models with multi-lines projecting module integrated within, and is possible for further improvement in the growing digital-dental industry.
An Energy Saving Train Operation Control Model Based on Time-Space Network Formulation
Authors: Hu Hui
Published: June 2013

From operation management strategy perspective, a multi-objective time-space network optimization model of train energy consumption on a high speed rail line is proposed on the basis of train time table predetermined. The models objectives are to minimize circulation of rail stock and total energy consumption, and decision variables are number of train units in stations, while constraints include node flow conservation, passenger demand and capacity limitation. Finally, a simulation case is provided and solved for comparison and an optimization analysis is carried on via weighting method to illustrate the models feasibility and effectiveness.
Visualization Engineering Simulation Based on HTML5 and Cloud Computing
Authors: Lu Wei Jun , Cui Bo Long , Hu Su Rong
Published: June 2013

Visualization Engineering Simulation Based on HTML5 and Cloud Computing is the first product using web technology in the development of simulation.This hardware simulation platform is a visualization simulation platform like Simulink, which is based on the browser, and provides a integrated environment with dynamic systems modeling, simulation and comprehensive analysis.
The platform adopted HTML5 system, realize the cross-platform simulation.By calling the HTML5 standard Canvas 2D Graphics and other new technology, developers can visually control elements and logic circuit simulation tests, and it truly realize the span of PC, Android, BB10 and other operating system platforms for the work.Simulation of the platform carry out in the clouds,and the simulation process lower the requirements over equipment, therefore the requirements on the hardware in developing becomes transparency.Long term, the platform will be the focus shifted to engineering simulation development of Internet air.
Effects of Organic Matters/Inorganic Matters Ratios (OM/IM) on Porosity and Expansibility of Ultra-Light Sewage Sludge Ceramsite (ULSC)
Authors: Yue Dong Ting , Yue Qin Yan , Gao Bao Yu , He Hong Tao , Wang Xiao Juan , Li Qian , Wang Yan
Published: June 2013

This paper discussed effects of organic matters/inorganic matters (OM/IM) ratios on the physical property, porosity and expansibility of ultra-light sewage sludge ceramsite (ULSC). The results indicated that ULSC with the high expansion and low water absorption were obtained when the OM/IM ratios were between 0.16 and 0.24. The OM/IM ratios had great effect on magnitude of physical forces of EF and ST; the relationship between EF and ST could determine pores formation and expansion of ULSC. Na-Ca feldspars of ceramsite grew as OM/IM ratios increased and the sintering process made some components of raw materials transform into other crystals having better thermostability.
Development of Automatic Reinforcement Bar Placement for RC Walls Based on Structural Building Information Modeling (S-BIM)
Authors: Ko A Ra , Lee Je Hyuk , Jang Hyun Suk , Lee Seung Il , Cho Young Sang
Published: June 2013

Structural building information modeling (S-BIM) for reinforced concrete walls based on parametric technique has studied. There are structural analysis and design packages for reinforced concrete structures. 3D BIM platforms which are recently developed and widely adopted in the construction industry are mostly experiencing a difficulty in interoperability with structural analysis and design packages. The modeling of reinforcement placement in the reinforced concrete structures can not be performed using current BIM platforms based on the result of structural analysis and design. This study develops the algorithm and implementation of integrated reinforcement bar placement system by creating a database that stores the results of structural analysis and design so that overall reinforced concrete model including re-bar can be built. Utilization of S-BIM can reduce the time of engineering, the production of working drawing and shop drawing.
The Swarm Intelligence Optimization Algorithm and its Application
Authors: Li Li Shan
Published: June 2013

In the article, three kinds of swarm intelligence optimization algorithm are discussed including the ant colony optimization (ACO) algorithm, the particle swarm optimization (PSO) algorithm and the shuffled frog leaping algorithm (SFLA). The principle, development and application of each algorithm is introduced. Finally, an example of TSP is used to test the performance of ACO.
Designing Economic Inspection Sampling Procedure with Bayesian Approach
Authors: Huang I Ping , Chyu Chiuh Cheng
Published: June 2013

This paper proposes a Bayesian inspection sampling model for single specification limit components with the objective of minimizing the expected total cost. The model assumes that the producer will undertake a two-stage Bayesian inspection process for the purchased lot: (1) determine the optimal sample size, and (2) after learning the sampling information, decide to either inspect all of the remainder or stop inspections. In particular, the paper studies the case where the quality characteristic of the component has a location-shifting exponential distribution with an unknown mean. Using gamma distribution as the conjugate prior, a closed form decision criterion for the second stage inspection process can be derived, and the computational complexity will be greatly reduced. The attribute sampling model under the same probability distribution and cost structure is also deduced and compared with the original model. Finally, an electronic lighting device example is used to illustrate the proposed model, and the effects of the model parameters are discussed.
A Literature Review on the Optimization Method of Emergency Transportation and Logistics System
Authors: Diao Ai Xia , Ma Chang Xi , Zhao Xiao Ning , Gong Liang
Published: June 2013

In case of public emergency such as natural disasters, accidents, public health and social security, if people fail to take timely effective response measures, the consequences would be incredibly bad. So, how to optimize emergency transportation and logistics system scientifically, and enhance the emergency support and emergency response capacity of the entire emergency management and emergency system, are the keys to improve stability, reliability and timeliness of public emergency warning defense system. Many scholars have done a lot of researches in dealing with emergencies. On the base of studying a large number of related documents, this paper summarized the optimization method of emergency transportation and logistics, and analyzed the existing shortcomings, and finally came to the conclusion and future research directions.
Comparison of Current-Voltage Characteristics of Bulk Polyaniline and Nano Dimensional Polyaniline Particles in Nanoporous Dielectric Matrix of MIL-101
Authors: Romanenko A.I. , Limaev K.M. , Dybtsev D.N. , Fedin V.P. , Aliev S.B. , Anikeeva O.B. , Tkachev E.N.
Published: June 2013

We investigated current-voltage (I-V) characteristics of bulk polyaniline and aniline polymerized inside nanopores of chromium terephthalate dielectric matrix MIL-101. The temperature dependence of electrical conductivity σ (T) of these materials are described by the fluctuation-induced tunneling model (FIT), which means that the main contribution to a net conductivity is caused by contacts between particles of the polyaniline. The comparison of I-V for these two types of materials shown that I-V characteristics of bulk polyaniline are described by the quasi-1D VRH model while for aniline polymerized inside nanopores of chromium terephthalate dielectric matrix MIL-101 by extended FIT model.
Research on the Multi-Project Management of IT Enterprises
Authors: Dong Zhi Sheng , Feng Jing Chun , Wang Tian Qi
Published: June 2013

Based on the three basic elements of multi-project management, that is, management objectives, organizational structure and information technology, the paper establishes target system, organization system, information system of the multi-project management through the analysis of the features of multi-project management of IT enterprises. In this way, it can solve the achievement difficulty of companies strategic objective, resource conflict, the difficulty of coordination, the complexity of management, etc. which are caused by the large number and the diversity of the project so as to reach the strategic objective of IT enterprises.
A Methodology and Modelling Technique for Taxi Path Optimization
Authors: Hou Zhi Ping , Jin Feng , Yuan Qin Jian , Li Yong Yi
Published: June 2013

Vehicle Routing Problem (VRP) is a typical combinatorial optimization problem. A new type of bionic algorithm-ant colony algorithm is very appropriate to solve Vehicle Routing Problem because of its positive feedback, robustness, parallel computing and collaboration features. In view of the taxi route optimization problem, this article raised the issue of the control of the taxi, by using the Geographic Information System (GIS), through the establishment of the SMS platform and reasonable taxi dispatch control center, combining ant colony algorithm to find the most nearest no-load taxi from the passenger, and giving the no-load taxi the best path to the passenger. Finally this paper use Ant Colony laboratory to give the simulation. By using this way of control, taxis can avoid the no-load problem effectively, so that the human and material resources can also achieve savings.
Relationship between Energy Consumption Structure and Environmental Pollution
Authors: Bu Yong Dong , Yang Yong Ping , Du Xiao Ze , Guo Yue Feng
Published: June 2013

Energy and environment in our economic and social sustainable development is two important issues. Consumption of non-renewable fuels may harm the environment. Domestic alternative renewable energy has been at the top of many discussions to solve the increasingly high gasoline prices in China. Renewable energy is an important energy resource which meets China's energy demand, improve energy structure, and reduce environmental pollution. In this paper, China's energy production, use and consumption of energy generated in the process environment, and an analysis of energy consumption for these problems of structural defects, and China for such practices have been, or are exploring the energy and environment policy review and outlook, presented a scientific operational countermeasures.
Microstructure Evolution and σ-Phase Precipitation Kinetics of 2507 Duplex Stainless Steel Aging at 850°C
Authors: Yang Yin Hui
Published: June 2013

A commercial 2507 duplex stainless steel with different solution treatments followed by aging at 850°C has been investigated. At the early aging time of 850°C, the σ-phase precipitate was predominantly distributed at the δ/γ interface, as the isothermal aging time was increased to 150 min, more σ-phase precipitate formed in ferrite and became coarser by a eutectoid reaction δσ+γ2. The amount of δ-ferrite decreased rapidly at the beginning of aging for 80 minutes, increasing solution treatment temperature from 1060°C to 1230°C delayed decomposition of δ-ferrite due to lowering σ-phase formation element (Cr). The reaction rate K and σ-phase precipitation rate were lowered by increasing solution treatment temperature from 1060°C to 1230°C.
Three-Dimensional Modeling and Finite Element Analysis of the Hydraulic Support
Authors: Li Ling Hui , Zheng Xiao Wen
Published: June 2013

A three-dimensional model of two columns covering hydraulic support was created by Pro/E software. The model was imported into ABAQUS software for finite element analysis. The stresss distribution of the hydraulic support in the conditions of the top beam partial load and the base reversed was got. The result was a reference in the design and structural optimization of the hydraulic support.
Fatigue Analysis of the Bridge-Type Grab Ship Unloader Based on Finite Element Method
Authors: Cao Guang Min , Qiu Fa Ju , Zhao Zhang Yan
Published: June 2013

Methods for anti-fatigue design of the crane and F.E.M. Rules for the Design of Hoisting Appliances were introduced. The structure of Bridge-Type Grab Ship Unloader, the object of this study, has been simulated, by using the finite element analysis software of ANSYS, to conduct the fatigue analysis and to give the calculation results, which can provide solutions to practical engineering.
The Finite Element Analysis of a Shaft
Authors: Zhang Guang Wei , You Li , Li Zhao
Published: June 2013

Finite element method is a kind of method with the aid of computer engineering analysis of discretization numerical calculation. In the rotary steering drilling during the process of practical work, there was a great drilling pressure torque, space size limit strictly and requires a high efficiency and reliability .The working conditions are complex when drillings work underground and the working environment is harsh, there may has many unpredictable situations, the drilling tool may encounter the loose soil, or may be a hard rock, and these changes force is transmitted through the variation cardan shaft, so it is very necessary to check the strength of the variation cardan shaft. This article analyze the variation cardan shaft by ANSYS and provide a reference for actual use.
Numerical Simulation of Deflection Fracturing with Finite Element Method Considering Crack Initiation Angle
Authors: Liu Zhen Yu , Zhang Ping Ping , Wang Hu Zhen , Zhu Xiang Rong
Published: June 2013

Aimed at deflection fracturing by oriented perforation, a two-dimensional, non-steady and two-phase Finite Element Method (FEM) is established. Taking a battery of wells in the inverted nine-spot rhombus pattern as object of study, it is reported that law of different crack initiation angle (CIA) affecting deflection fracturing. In the respect of daily oil production and cumulative oil production, the dual fracture with different CIA is more than straight fracture. So it is feasible to use deflection fracturing of oriented perforation to increase the production of the special low permeability oilfield. In contrast to dual fractures with different fracturing initiation angles, we can see that the wider CIA, the higher cumulative oil production. So we can draw such a conclusion that when deflection fracturing is implemented, angle should be increased if the working condition is permitted so as to increase the production of oil well.
Impact Resistance Research of Composite Laminate Structure
Authors: Li Hong Peng , Li Shu , Huang Fang Lue
Published: June 2013

The composite material has been widely used in aircraft structures. But this kind of material has some shortage such as poor impact resistance, low residual compressive strength, which have a negative influence on the performance of aircraft structures. In this paper, simulations of low-velocity impact and compression process of composite laminates with AL ply and different core material has been done. The simulation results show that softer core materials and AL ply with certain thickness can improve the residual compressive strength
Transmission Parameters Optimization Design and Load Factor Formula Fitting of WN Gears Drive
Authors: Mu Xiao Kai , Li Yu Guang , Chen Dian Hua , Li Cheng Chao
Published: June 2013

The research is to solve nonlinear constrained optimization problems by the method of sequence quadratic programming (SQP) in MATLAB optimization toolbox and mathematical programming theory. This paper taking the high strength of WN gears drive as design target and the WN gears drive optimization design model of actual project is put forward by the concrete examples which are widely used in modern machine of the high speed and heavy load WN gears drive. Using the optimization design model to analyze the relationship about gear drive parameters on contact and bending fatigue strength. This research adopts the formula fitting design method not only improved design efficiency but also provided application foundation for CAD design of WN gears driving.
Influence of Screw Spacing on the Strength of Self-Drilling Screw Connection for the High Strength Cold-Formed Steel
Authors: Sapiee Siti Fairuz , Lau Hieng Ho
Published: June 2013

Self-drilling screws are the primary means of fastening for cold-formed steel members in cold-formed thin-gauge steel residential construction because it can drill their own holes and form their own threads. The fabrication of connections is the most labour intensive aspect of the cold-formed thin-gauge steel construction process, thus a better understanding of the behaviour of screw connections could lead to optimum connection design and reducing the cost of the fabrication. The study carried out to investigate the behaviour of single-shear connections using self-drilling screws in the cold-formed steel construction. The focus of this study is on the influence of the number of screws and screw spacing on the strength of self-drilling screw connection. These parameters are varied to determine their influences on the connection strength. The failure load and failure modes were obtained and observed from the tests carried out in the laboratory. Bearing and tilting failures occurred during the testing of these specimens. The predicted connection strengths were calculated using American Iron and Steel Institute (AISI) design equations. A total of 24 specimens of single shear test showed that connection strength is linearly proportional to the number of screw in the connection. Results of the specimen with spacing more than 3d show better correlation with the calculated results as compared to specimens with screw spacing less than 3d.
Pressure Cooker with Composite Bottom Thermo-Mechanical Coupling Simulation
Authors: Zhang Xiang Hong , Yang Han , Zhang Hao , Liu He , Guo Hong Fen
Published: June 2013

t is required to use specialized large-scale pressure cooker to process and cook rice in high altitude. The design of large-scale pressure cooker with composite bottom is a very complicated process, involving in nominal operating pressure, safe pressure and breakdown pressure, etc., especially the advantage of composite-bottom pressure cooker possesses, which are fast heat conduction, high efficiency and energy conservation, but it is very easy to ignore thermo-mechanical coupling effect which the compound aluminum steel of pressure cooker with composite bottom exerted in the hot operation working condition in the process of designing pressure cooker, once the bottom is dropped due to the condition of high temperature, the whole feeding equipment will not work properly. Analysis software ANSYS is applied to make simulating calculation for thermo-mechanical coupling of super-huge type pressure cooker with composite bottom, verifying if it can operate properly in the field condition of long time and high temperature.
Determination of Residual Fracture Toughness of Post-Fire Concrete
Authors: Zhang Rui , Lu Zhou Dao , Yu Jiang Tao
Published: June 2013

Determination of double-K fracture parameter using both analytical and weight function method is carried out in present research. In calculating the cohesive fracture toughness, two situations are divided at critical load. Wedge-splitting tests with ten temperatures varying from 20oC to 600oC are implemented. The complete load-crack opening displacement curves are obtained from which the initial and critical fracture toughness could be calculated experimentally. The validation of double-K fracture model to the post-fire concrete specimens is proved. Meanwhile the weight function method agrees well with the analytical method.
Structural Analysis and Improvement of Large-Scale Forklift's Wheel Rim
Authors: Wang Hu Qi , He Hai Zhao , Lu Hai Yan , Huang Rong Xing
Published: June 2013

A large-scale forklift's wheel rim appeared cracking phenomenon in the course of use. This article summarized and analyzed force of the forklift's wheel rim according to the typical working conditions of forklift, and calculated the load of various working conditions. It provided the correct boundary conditions for the finite element analysis of the wheel rim [. After the analysis of wheel rim's three typical conditions, found the weak parts of the structure of the rim, and this part was consistent with the feedback part, so it proved correct of the finite element analysis model. Clever was used ribbed-plate and punching groove to strengthen the weak part of wheel rim and the finite element model was used to calculate and check the improved wheel rim again. The results showed that the improved wheel rim stress decreased quite, so the measure was correct.
Based on Micromechanical Damage of Experimental Study on 20 Steel Notched Specimen's Acoustic Emission Characteristics
Authors: Zhang Ying , Wang Zi Xing , Liu Ai Ling , Gao Han
Published: June 2013

Based on the Gurson-Tvergaard-Needleman micromechanical damage model, taking void growth ratio VG as the damage variable established acoustic emission (AE) quantitative evaluation model. Taking steel 20 notched bar specimens tensile process as example, get AE information from yield to fracture process. Using ABAQUS analyzed the meso-damage process during tensile process of the specimens, and get the numerical solution of meso-damage parameters. Based on AE testing and the results of Finite Element Simulation, established the quantitative evaluation formula of VG and AE cumulative hits N during 20 steel notched specimens tensile process. Result shows that, 20 steel from yield to fracture damage, the relationship between N and VG is divided into two stage, namely linear damage stage and nonlinear damage stage. When the N reaches 61, the material is at the transition stage from linear damage stage to nonlinear damage stage.
The Progressive Optimization Model on the Corrosion Rate of the Grounding Grid
Authors: Dai Fen Lei , Xie Wen Qiang
Published: June 2013

Established a cross-validation of the model optimization algorithm in order to predict the corrosion rate of the grounding grid. Forward neural network input variables by principal component analysis to extract the main element, eliminating the correlation between variables; cross-validation method and change the termination of the neural network training conditions, the selection of network training model. The final simulation results show that, get a good grounding grid corrosion rate stability and generalization performance optimization prediction model can predict the corrosion rate of the grounding grid.
Research and Application of Material Corrosion Prevention Technology in the Completed well System for Sour Gas well
Authors: Li Ling Feng
Published: June 2013

For natural gas well in sour gas reservoirs, very serious corrosion in the completed well system is an important factor of gas production system life. In order to ensure the long-term development of gas wells, this paper mainly introduces material corrosion prevention technology in the completed well system, such as corrosion-resistant alloy steel corrosion control technology, bimetallic combination tubing, corrosion inhibitor technology and so on. By taking LJ Gas Field as an example, this paper introduces the material corrosion prevention technology in the completed well system in LJ Gas Field. For application in the completed well system in LJ Gas Field, the technology above have good performance of corrosion resistance.
Numerical Simulation on the Flow Field inside an Ultrasonic Water Meter
Authors: Chen Hong , Kai Zhang , Ling Yao , Zhang Hong Jun
Published: June 2013

Flow field inside an ultrasonic water meter of time-difference-type are numerically simulated at several flow rates. Linear mean velocity (LMV) averaged along the line between the transmitting transducer and the receiving one, and the surface mean velocity (SMV) averaged in the cross section of the reducing-type flow passage, and the flow correction coefficient are calculated with the flow field data obtained by the simulation. Its found that the values of flow correction coefficient for the reducing-type meter channel flow are quite different from that for a fully developed pipe flow, and are related to the flow rate or Reynolds number.
The Helmet Reverse Forming and Static Characteristic Analysis
Authors: Wang Shi Gang , Wu Guan Xiong , Cui Chao , Li Xi Bing
Published: June 2013

In order to solve irregular product surface quality is difficult to test problems, this paper combined reverse engineering with finite element analysis related technologies, good results have been achieved. Selected the helmet as the research object, introduced the reverse engineering and finite element analysis of the basic methods and ideas. First through the 3D laser scanner for safety helmet surface point cloud data, the data conducted the pretreatment in the Imageware software, and then in UG finished surface reconstruction and materialization process, finally guided the reverse forming helmet entity into Ansys Workbench software to carry on the finite element analysis, through the generation of stress and deformation analysis nephogram to test the sample quality.
Effect of Surface Oxidation at 1500 °C on Flexural Strength and Thermal Shock Resistance of the ZrB2-SiC-ZrC Ceramic
Authors: Wang Min , Wang Zhi , Li Shi Chao , Zhang Jian , Zhang Bao Shuai
Published: June 2013

The isothermal oxidation of the ZrB2-SiC-ZrC ceramic was carried out in static air at a constant temperature of 1500±15 oC for 20 min. Compared with the original strength of 580 MPa, the strength of the oxidized specimen increased to 655±45 MPa, because the flaws in the surface of the specimen were sealed by the oxide layer. The thermal shock resistance of the specimens before and after the oxidation was measured by the water quenching. The measured ΔTcrit for the oxidized specimen was 641 oC that was obviously greater than 348 °C for the unoxidized specimen. The improvement in the thermal shock resistance was attributed to the formation the oxide layer on the surface of the specimen. The results here pointed to a promising method for improving strength and thermal shock resistance of ZrB2-based ceramics.
Design and Development of the Loading Subsystem in FEM System
Authors: Xu Mei Rong , Wang Bo Wen , Li Meng , Wang Jian Xi
Published: June 2013

Loading subsystem is an important module of the FEM software: its performance can directly affect the correctness of the calculation results of the FEM system, as well as the speed of system operation. In this paper, we apply MFC technology, the VS2010 platform and use the ACCESS database as data storage tools to develop the loading subsystem. By means of defining data class and data management class, the function of loading subsystem was achieved. Finally, the cases illustrate that the subsystem can draw beautiful boundaries and keep the value accuracy. This article provides the design and implementation for a similar system reference.
A Static-Stability Analysis Method for Ships Based on the Second-Development of Solid Edge
Authors: Lin Zhuang , Zheng Ya Xiong , Zou Jing , Sun Han Bing , Xu Deng Hui
Published: June 2013

A static-stability calculation method for ships which use the second-development of Solid Edge is presented in this paper. The second-development of Solid Edge applied Visual Basic to divide the waterplane and measure the parameters concerned static-stability calculation such as the volume and center of the underwater model. Furturemore, it makes the statics-stability calculation be convenient that the paragraph of static-stability is calculated on the parameters and the dismiss angle is returned. According to the comparison of the experiments and the theory, including different forms of superstructure models, it can be proved that this method is reliable and effective in the static-stability calculation for ships.
Finite Element Model and Fluid-Structure Interaction Analysis of the Intravascular Stent
Authors: Yu Wen Yan , Wang Jian Guo
Published: June 2013

The 316L stainless steel stent was analyzed about the effect on interaction with plaque and vessels and blood flow during and after implantation using finite element method (FEM) and computational fluid dynamics (CFD). The results showed that tilted ends are likely to damage the intima which may stimulate thrombus formation and neointimal hyperplasia and will cause the restenosis. Stagnant zones formed by the stent may cause the backflow phenomenon, which also contribute to the important elements of in-stent restenosis (ISR).
Cone Section Member Integration Design and Production Methods
Authors: Wang Shu Ying , Yang Zhan Min , Wang Yi
Published: June 2013

This paper uses cone cutting line method and plane curve generation method to study the cone section and plane expansion method, establish the transformation of different form curve. This paper analyzes bounded cone section characteristics and components of graphic design methods, combined with specific models, gives cone component integration design and production methods.
Based on OOA Modeling of Gantry Crane CAD System
Authors: Xu Ge Ning , Liu Jin Shuai , Yang Jun Bing
Published: June 2013

In order to explore the application of the object-oriented theory in the analysis phase of the gantry crane CAD system development, the OOA modeling method is used to establish the system model and the detailed process guide and engineering strategies of modeling activities are presented, eventually a OOA model of the system is established and a foundation is lay for the subsequent OOD and OOP of the system.
Second Development of Panel Furniture Based on Pro/E
Authors: Yang Yan Hong , Zhong Xiang Qiang
Published: June 2013

The parametric design and second development flow of panel furniture are analyzed based on Pro/E and modular design method. It created manage database of panel furniture based on SQL2000 and ADO technology, it analyzed synchronous development mode of Pro/TOOLKIT, menu design and DLL dynamic link library development were talked, the parametric design system of hall cabinet, bedside cabinet and wardrobe under VC ++6.0 development environment was developed. Throng example program verification, the method is feasible; it can rapidly finish panel furniture models, and improve the designer's working efficiency.
Simulation Study about Dual Spark Plug Position for the CNG Engine Combustion Process
Authors: Song Chang Qing , Li Jun , Qu Da Wei , Yu Kai
Published: June 2013

The paper has modeled and simulated the combustion process of big bore CNG engine by three-dimensional simulation software AVL FRIE. Based on test validation in the model, the effect on position of the dual spark plug for cylinder initial flame kernel development and flame propagation process was researched. The results showed that: When A=0.5, the flame propagation distance shortened by half, a certain intensity of turbulence formed when the compression stroke ended, the combustion speed was the fastest, the combustion duration was the shortest. If dual spark plug spacing is too small, the two flames meet prematurely will cause interfere with each other, and reduce the combustion speed of the overlapping region of the flame surface, increase the heat losses. Otherwise,if the distance is too large , close to the combustion chamber wall, the combustion space is narrow, the flame propagation space is restricted, then flame development is slow.
Modification of Stainless Steels Surface Layers by Nitriding and Carbonitriding
Authors: Skakov Маzhyn , Kurbanbekov Sherzod , Scheffler Michail , Naltaev Azretay
Published: June 2013

The structure of low-carbon steels after saturation by nitrogen and carbon in the mode of electrolytic-plasma nitriding and carbonitriding on the surface structure of austenitic stainless steel 12Cr18Ni10Ti has been studied. Optimum modes of electrolytic-plasma nitriding and carbonitriding are determined ensuring the maximum saturation of nitrogen and carbon, the microhardness of the surface. It is established, that after electrolyte-plasma processing microstructure of steel 12Cr18Ni10Ti has martensite structure. As a result of the research it is revealed that steel 12Cr18Ni10Ti after the electrolyte-plasma processing has high hardness.
Simulation of Kinematics and Dynamics of Large-Displacement Motion Simulator
Authors: Zhou Yue Fa , Liang Kun , Zhang Zhi Yong , Song Tian Shu , Zhou Wen Bo
Published: June 2013

The kinematics and dynamic analysis of the large-displacement motion simulator is analyzed and derived in detail. By using MATLAB program, the simulation curves of the derived kinematics and dynamic formula match to the practical situation. Our result will provide the theoretical direction for the further study of the large-displacement motion simulator.
Simulation and Analysis of the Hybrid Bus Performance Based on AVL-Cruise
Authors: Yu Kai , Song Chang Qing , Fan Lu Yan , Qin Hao
Published: June 2013

Recently, due to the reduction of oil and the deterioration of environment, people raised higher request for fuel economy and emissions, hybrid vehicle developed rapidly in most countries because of its low fuel consumption and emissions. In order to develop appropriate hybrid system, the text builds the model of prototype bus in the AVL-Cruise platform first, and then, establishes the model of PHB and accomplishes the control strategy of vehicle in the MATLAB/SIMULINK environment. The simulation data indicates: PHB can improve the fuel economy and emission performance effectively with guaranteeing a good dynamic performance of bus.
Parameter Studies for Wheel Wear Using a Flexible Wheelset
Authors: Wu Na , Zeng Jing
Published: June 2013

In order to reduce wheel profile wear of high-speed train and extend the service life of wheels, a high-speed vehicle multi-body dynamic model and wheel profile wear model are established, in which the wheelset is considered as flexible. The influence of wheel profile, track gauge, and rail cant is extensively studied. The simulation results show that the type XP55 wheel has smallest cumulative wear depth, and type LM wheel has largest wear depth. It is known that the equivalent conicity of the wheel should not be too large or too small. The track gauge with 1435-1438mm and rail cant with 1:35-1:40 can have better wheel wear performance.
Testing and Modeling of Mechanical Parameters in Resistance Welding Machines
Authors: Wu Pei , Zhang Yong An , Xuan Chuan Zhong , Ma Yan Hua
Published: June 2013

The dynamic mechanical responses of resistance welding machine,which is mainly governed by the mechanical parameters of the machine, is very important to the weld quality especially in projection welding when collapse or deformation of work piece occurs. In this paper, a mathematical model for characterizing the dynamic mechanical response of resistance welding machine and a special test set-up called breaking test set-up have been developed. Based on the model and the test results, the mechanical parameters of the machine were identified, including the equivalent mass, the damping coefficient, and the stiffness for both electrode systems.
Synthesis and Characterization of Ethyl Cellulose Based Acrylate
Authors: Yu Juan , Wang Chun Peng , Wang Ji Fu , Chu Fu Xiang
Published: June 2013

Ethyl cellulose based acrylate (AEC), an ethyl cellulose based macromonomer, was successfully synthesized by the esterificaiton reaction between ethyl cellulose and acryloyl chloride in homogeneous media and characterized by FTIR, 1H NMR, 13C NMR, differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). The results showed that acrylic group was facilely grafted onto the backbone of ethyl cellulose. In addition, AEC was proved to be able to homopolymerize and copolymerize with other monomers such as butyl acrylate in the presence of free radical polymerization initiator. We believed that development of AEC together with the analysis of its structure and properties would contribute to further utilization of cellulose based materials.
Stability Analysis of Chatter System on Ultrasonic Honing
Authors: Shao Yun Peng , Zhu Xi Jing , Liu Meng , Liu Zhen
Published: June 2013

The chatter caused by the inner factors of the machining system in the ultrasonic honing process would seriously affect the surface quality of combustion engine. A dynamical model of ultrasonic honing chatter system was established, which involved with ultrasonic honing mechanism and dynamic honing depth, the relationship between the limit honing width and honing speed was deduced based on the theory of regenerative chatter; the simulation was carried out to obtain the effect of different parameters including stiffness coefficient, damping ratio, spindle speed and reciprocation motion speed on the stability limit curve of the chatter system. It can be concluded that the ultrasonic honing chatter system have better stability with low spindle speed, high stiffness and damping ratio, which providing foundation to eliminate ultrasonic honing system chatter in the precision machining of cylinder liner.
Parametric Study of Graphite Insert Erosion
Authors: Liu Rui , Chen Xiong , Zhou Chang Sheng
Published: June 2013

Two identical segmented nozzles, consisting of graphite inserts and insulated with glass-fiber reinforced composites in the convergent and divergent sections, are used in the firing test at same operating condition. Due to the different thermal resistance ability, steps are formed at the interface of two materials. More specifically, the forward-facing step presents at the interface in the convergent section while the step in the divergent section is backward-facing and located at a certain distance downstream from the interface. This can be attributed to the opposite sequence of contact with the flow at the interfaces. The erosion rates, following the distribution of Reynolds number, exhibit an upward trend in the convergent section and decrease in the divergent section for both silicon phenolic and graphite. In addition, the graphite recession reaches the maximum value in the throat region. Along the cross-flow direction, the erosion rates are basically the same because the flow structure in the nozzle nearly axisymmetric. For the graphite nozzle insert, a correlation was developed in terms of chamber pressure, Reynolds number and nozzle geometry. The calculated erosion rates from the correlation showed agreement within 5% of the experimentally determined values.
Numerical Simulation of Flow in Imported Steam Turbine Inlet Components with Equilibrated Holes in High Performance
Authors: Tu Shan , Wu Shu Ming , Zhou Qi , Zhang Hong Mei , Zhu Xiao Qing
Published: June 2013

The main inlet component of steam turbine is control valve. The stable operation of the steam turbine control valve is vital for safe and stable operation of the steam turbine and safety production of the power plant. However, due to the complexity of the structure and unsteady characteristics of steam flow in the valve, there is not enough experimental method about the detailed flow characteristics of the area near control valve disc and the inside of the valve chamber up to now. This article is to focus on the simulation of the steam turbine control valve interior flow field which includes the valve pre-inlet channel in different conditions, then find the reasons which caused instability and pressure loss of the control valve by analyzing the flow field details, finally further optimization design. The profile matching of the valve disc and valve seat has a great influence on the interior flow field of control valve, so analysis of the high performance valve disc shape and divergence angle of valve seat is carried out, and the research conclusion is used for guide design and development of the control valve.