bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study of Injection Conditions for a Thin-Walled Wax Pattern Using Response Surface Methodology
Authors: Liu Chang Hui , Jin Sun , Lai Xin Min , Wang Dong Hong , Wang Yu Lian
Published: July 2014

In this paper, the relationship between the shrinkage of the thin-walled wax part in the investment casting process (ICP) and the process parameters including mold temperature, melt temperature, packing pressure and holding time are investigated through a series of experiments. The relationship is successfully described by a mathematical regression model which is based on the response surface methodology (RSM). The rationality and adequacy of the mathematical model are checked via analysis of variation (ANOVA) and a sensitivity analysis for process parameters on the dimensional shrinkage variation are conducted which shows that the contribution percentages of mold temperature, melt temperature, packing pressure and holding time are 23.77%, 43.67%, 11.85% and 16.99%, respectively. Additionally, the optimal setting of the process parameters is also obtained by calculating the desirability function. The optimal combination of the mold temperature, melt temperature, packing pressure, and holding time is 74°C, 30°C 25bar, and 5 sec, respectively.
Development of Batch-Type Electric Furnace for Recovery of Valuable Materials from Spent Batteries
Authors: Shin Shun Myung , Lee Dong Won , Yun Jung Yeul , Jung Byung Ho , Wang Jei Pil
Published: July 2014

Electric furnace for thermal treatment to recover valuable materials from spent batteries was newly designed to enhance it with safe, efficient, and eco-friendly processes. Spent batteries were handled in the furnace at 500°C for 2 hours under argon atmosphere and they were found to be separated in side reactor with easy. The electrodic powder including valuable metals such as Mn, Ni, Co, Zn, etc. was recovered from bulk components through sieving process.
Elastodynamic Analysis on a Long-Distance Transmission Roller Chain
Authors: Zhao Jun Tian , Wang Shun Zeng , Yang Xiang
Published: July 2014

Based on the elastic model of a long-distance transmission roller chain, the elastodynamic analysis was taken in this paper, which has given unregulated displacement of chains. With RecurDyn software for the analysis and verification of the theoretical results, the displacement curves of X-axis, Y-axis and total displacement was obtained, which proved that the elastodynamic analysis on long-distance transmission roller chains is feasible with a continuous model.
Experiment Study on Achieving Triangle Spraying for Complete Fluidic Sprinkler
Authors: Liu Jun Ping , Jiang Jian Yuan , Liu Xing Fa
Published: July 2014

The working principle of complete fluidic sprinkler was introduced, the inlet section was changed by the activity pieces relative movement, and the wetted radius was changed with it. The structure form was designed to achieve a triangle spraying. The performance parameter of variable-rate sprinkler was introduced, they include the flow, wetted radius, spraying uniformity and sprinkler irrigation intensity. The hydraulic performance experiments of triangle sprinkler were carried out by the automatic measurement system. The change of wetted radius curve and irrigation water distribution map was achieved. The maximum value of wetted radius was 20.1 meters and the minimum value was 8.5 meters. The variable irrigation of triangle was achieved. The figure coefficient was great, and the effect was better.
Operational Features of Motorized Spindles with HSK Tool Connection
Authors: Molodtsov Vladimir Vladimirovich , Barbin Andrey Yurevich
Published: July 2014

The article describes main trends in cutting performance enhancement: traditional force cutting and high-speed machining. Results of analysis of products by world's leading manufacturers of motorized spindles are provided, and conclusion is made that the most used standard for connection between spindle and toolholder in drilling, milling and boring machines is HSK. Limitations of operational features of motorized spindles by load capacity of HSK connection and efficiency of tool usage are shown.
Kinematics Simulation Research on Bionic Manipulator
Authors: Zhao Kai , Song Li Min , Wang Chun Guang , Li Wan Qing , Cao De Jin
Published: July 2014

Using mechanism design and dynamic analysis software, the simulation is conducted about grasping operation and moving objects for multi redundant manipulator on the basis of mechanism design and theoretical research, as well as the snake crawling motion simulation. The simulation results validate the correctness of theory analysis. The each joint driving torque data and curve provided the effective data basis for the design and development of a prototype.
Design of Galvanometer Laser Scanning System Based on FPGA
Authors: Lv Qiong Ying , Sun Yu
Published: July 2014

Aimed at the problem of data transmission in low speed, this paper employs a new system, which contains galvanometer, laser sensor, periphery and FPGA-the core of the system. Describe the working process of hardware and software design. Experiment shows that laser scanning frequency reaches 30 KHz, galvanometer triggering time is less than 300 ns and galvanometer works continuously.
Topology Optimization of Upper Turntable of General Vertical Rocket Rivet Fixture
Authors: Zhang Yong Hong , Sun Chao , Gu Wen Tao
Published: July 2014

In this paper, analysis and design of an upper turntable of general vertical rocket rivet fixture are presented by employing the finite element methods and topology optimization design which are based on the variable density method, in order to reduce the mass and volume of the turntable of general vertical rocket rivet fixture and improve rivet precision. During the design the loadcase is considered: constant force and torque, which is simplified and closer to actual working conditions. From static analysis of the original turntable, a topology optimization model was set up. By using topology optimization calculations a new turntable model was built and the analysis of it using finite element methods was carried out. Comparison between the optimized model and original was conducted and the results show that the stiffness was remarkably improved, the stress was well-distributed and the displacement was reduced after optimization. For designing other complicated structures this method can also provide reference and guidance.
Study on Gas-Liquid-Solid Three-Phase Flow Field of Radial-Straight-Vane Wet Fan
Authors: Zhao Hai Ming , Li Mi , Ji Ya Qian , Xie Xin
Published: July 2014

By using experimental method, the optimal operating values of inlet and water consumption are derived at each dust concentration.And the FLUENT is used to simulate the gas-liquid-solid three-phase flow field in the radial-straight-vane wet fan,whose results show the effects of flow speed, stress distribution, droplets and dust particles on flow field.Based on the analysis of other influence factors,the paper proposes a further improvement for the fan as well.
Loading Capacity Calculated and Finite Element Analysis for Trough Roller
Authors: Qiu Hai Fei , Wu Song Lin , Yang Hong Cai
Published: July 2014

Trough roller is an important component part on belt conveyor, the carrying capacity of the roller is a basis of belt conveyor. The calculation principle and method of material’s cross section area is deduced in the thesis, and mechanical analysis of the trough roller is carried out based on that, in results, the static load of it is calculated. The finite element model of the trough roller is set up by Simulation /Works software, and then the stress and deformation results of it is clear through finite element statics calculation and analysis. Based on this thesis, some valuable basis and reference are offered to trough roller’s strength and stiffness design.
Numerical Simulation of Supersonic Subsea Compact Wet Gas Separator for Gas Transmission Pipeline
Authors: Hashim Fakhruldin Mohd , Ahmad M.F.A
Published: July 2014

Conventional wet gas separators are used as a means to remove free water using the gravitational settling and momentum principle. However, these separators possess setback in terms of its efficiency. Alternatively, supersonic compact wet gas separators have been designed in Universiti Teknologi PETRONAS Gas Separation Research Center (UTPGSRC) which uses supersonic flow to separate natural gas and free water. In its preliminary design, determination of the flow behavior according to the design of the separators is important. The result provides information whether the design can be accepted or improvement should be taken into consideration. It is therefore an objective of this paper to numerically simulate and analyze the flow characteristic such as velocity, pressure and temperature distribution correlating with the separator design. From the flow performance results obtained, it shows that the separator design has fulfilled the requirement.
Comparison of Theoretical and Numerical Analysis of Shell and Tube Heat Exchanger
Authors: Jeon Rock Won , Sin Bong Su , Praveen Kumar S.P. , Kim Si Pom , Lee Kwon Hee
Published: July 2014

In this paper, the simplified approach using commercial computer software code was adopted to predict the performance of a kettle typed shell and tube heat exchanger. Similarly the numerical analysis using ANSYS/CFX is conducted for the same design and the result data are collected to analyze its performance numerically. In general, the heat exchanger performances are evaluated by predicting the temperature difference and pressure drop. The result data of both the analysis are compared to find the differences between the data. From the comparison, we came to know that the error percentage between the two analysis results is very low which is acceptable proving our design is convincible. Thereby we fabricated a prototype model of shell and tube heat exchanger (kettle type) with the same parameters used for these analyses.
Finite Element Analysis of the Rubber of the Prosthetic Knee Joint
Authors: Liu Ying , Zhang Xiu Feng , Ma Yan
Published: July 2014

Rubber played a buffer role in prosthetic knee motion. Rubber bearing is a very complicated process, and rubber material itself is nonlinear. ABAQUS software can able to deal with highly nonlinear problems. Input rubber test data in ABAQUS, selection of constitutive model, and then the finite element model is established, which is calculated, finally obtains compression under different loads.
Simulation Analysis of Thinning Spinning Instability of Tube with Extra Thin-Wall and Height Diameter/Thickness Ratio
Authors: Luo Ya Zhou , Li Xin He , Zhang Xu , Luo Bu Fan
Published: July 2014

To break through the process problem of thinning spinning instability on extra thin-wall and height diameter/thickness ratio tube,this paper applied the finite element software MSC.MARC to simulate the drum instability phenomenon of thinning spinning under the condition of different diameter/thickness ratio.Analysed the process of the drum instability of workpiece.And explain the characteristics of stress field and flow field of the workpiece and the instability mechanism in the deformation area.So as to provide theoretical guidance for researching the stable precision spinning of cylindrical workpiece with extra thin-wall and height diameter/thickness ratio.
Clustering of Composite Protein Films and their Packaging Properties
Authors: Lei Qiao , Zhang Yu Ting , Pan Jia Zhen , Bao Jian Qiang , Huang Zhi Ying
Published: July 2014

Cases of 30 whey protein isolate-sodium caseinate-glycerol composite protein films based on different ingredients and processing techniques, and their packaging properties were analyzed by Q and R cluster analysis, respectively. The results verified that there was a correlation in either 30 cases or 7 indexes of packaging performance, which contributed to a scientific sorting. 30 cases could be divided into 5 groups by Q cluster analysis with the Euclidean distance at 40, in which case 28 and 30 exhibited the highest similarity. On the other hand R cluster analysis in packaging performance indicated that gas permeability and haze values of composite films tended to be more similar than the others.
Unsteady Flow Simulation of Directional Control Valve in Electro-Hydraulic Systems by Numerical Analysis
Authors: Junchangpood Aphaiwong
Published: July 2014

The objective of the present paper is a numerical analysis of the transient flow through a 4/3 hydraulic closed center direction control valve. The real-time discharge coefficients corresponding to supply flow difference have been considered. In order to develop an intelligent control system for an electro-hydraulic system (EHS), a new controller has recently been proposed to control those parameters in a complex system. However, a mathematical model of the EHS including the transient parameters has not been clarified. The main objective of this paper is to numerically analyze the dynamic characteristics of the directional control valve and also the flow behaviors in the electro-hydraulic system control. Both the steady state and transient flow though the valve which affect to flow-pressure coefficient were numerically considered. Moreover, this paper presents numerical results, which explain the flow behaviors related with the real-time pressure drop and discharge coefficient. Both a high inlet flow and a large opening spool have determined the pressure drop increment.
Research on the Ride Comfort of Electric Drive System Based on Double Trailing Arm Suspension
Authors: Wang Wei , Li Yan , Zhang Shan , Wang Bin
Published: July 2014

Based on double trailing arm suspension, relating to two-wheel-drive structures with inhibition of vertical vibration: a motor-integrated electric wheel-drive system and an electric wheel-drive system of which the motor can swing up and down and act as a dynamic absorber. In the paper a unified differential equation of motion of the two electric wheel drive systems was deduced, and Matlab and Adams were applied to simulate and analyze the ride comfort of the two drive systems. The analysis results show that compared to the traditional In-Wheel Motor Driven EV, the vertical acceleration of the car body of either of the two drive systems is lower, which significantly increases the ride comfort of car. Between the two electric wheel-drive systems, the latter system with dynamic absorber motor is more efficient to inhibit vertical vibration.
Influence of Tailrace Surge Chamber with Standpipe on Draft Tube Pressure
Authors: Chen Sheng , Zhang Jian , An Jian Feng
Published: July 2014

Standpipe is a connection between surge chamber and tunnel, which can greatly reduce the quantities. This present study deals with how to take the influence of standpipe into consideration and what extent is the influence. The mathematical model of standpipe is established by introducing the method of characteristic. Then the model is applied in one pumped storage power station with long standpipe of 67m. Results show that the standpipe has great influence on whatever tank surge or pressure. And with the increasing standpipe length, the upsurge and minimum draft tube pressure present downtrend. The influence of standpipe in tailrace surge chamber should be considered in design phase. The achievements of the study can serve as a reference for similar projects.
The Vibration Radiation Noise and Optimized Analysis of the Shell
Authors: Meng Qing Ming , Hao Zong Rui , Xu Juan , Liu Jun Li
Published: July 2014

The radiation noise of motor shell vibration during operation is studied by finite element method. Firstly the finite element model is established to calculate the vibration frequency response characteristic. And on this basis the frequency response characteristic of the sound pressure under the work condition is calculated. The result shows that the vibration of the lateral wall and upper wall of the shell produces the radiation noise. And the radiation noise from the lateral wall makes a more significant contribution by comparison. While the method of adding the surrounded structure and stiffener to the shell can effectively reduce the vibration of the lateral wall and upper wall, which can finally reduce the vibration noise by 10dB.
Vibration Test of Bearing Ball Fatigue Testing Machine Based on VB
Authors: Wu Shu Qian , Mei Mei , Zhou Jing Ling , Zhu Wei Nan , Wu Guo Qing
Published: July 2014

Ball bearing life test, once the failure specimen ball fatigue, if not timely shutdown, will lead to a series of chain reactions caused by the fault processing is not seasonable, serious word may also lead to the damage of equipment. Therefore the vibration test is very important to accurately determine the specimen failure, ball. In this paper, the vibration test for bearing fatigue testing machine, the test results to be real-time and accurate judgment sample ball failure.
Design and Manufacture of the Prototype of an Innovative Pump for ‘Proof of Concept’ Test
Authors: Ahmed Noor A. , Day Terry R.
Published: July 2014

The design and manufacture of an innovative pump conceived based on vortex diffusion is described in this paper. The authors believe the pump has the potential of achieving higher efficiency gains than those currently available. A prototype was, therefore, manufactured for laboratory testing and eventual field trials and commercial manufacture. The success of the concept in achieving the goals, will pave the way towards significant savings in fuel expenditure through lower pumping costs.
Investigation of Redox-Transmetallation Process for Coating of Gold(Au)-Shell on Nickel(Ni)-Core Nanoparticles
Authors: Nik Roselina N.R. , Aziz Azizan , Hyie Koay Mei , Mardziah Che Murad , Salleh Zuraida
Published: July 2014

Core-shell nanoparticle has created great interest among researchers due to their various unique properties. The new properties created are combination of both the core and the shell. In this work, pre-prepared Nickel (Ni) nanoparticles were coated with Gold (Au) to produce core-shell structure. Formation mechanism of the core-shell structure is investigated via UV-Vis spectrum of the as-synthesized particles and its supernatants. Ni nanoparticles were synthesized using polyol method with hydrazine as the reducing agent. Coating of Au was conducted using sodium citrate as the reducing agent and acid citric to control the pH of the mixture. UV-Vis absorption spectra analysis of as-synthesized nanoparticles and the supernatant results revealed that the coating happened via redox-transmetallation process with a very broad peak at about 540 nm and size range of 26 - 40 nm. XPS results suggest that the coating consists of Au compound.
Finite Element Analysis and Topology Optimization Design for Motional Board of Injection Molding Machine
Authors: Zhang En Guang , Wang Li , Shan Wen Ju
Published: July 2014

The structure and the load-carrying capability of the front board of injection molding machine are more complex. The error of the approximation algorithm employed in engineering is larger so that the board may become invalid in the process of using, The finite element analysis can obtain the stress distribution in the parts so as to improve the accuracy of calculation and the quality of design; through The topology optimization analysis will take the initiative to find the optimal plan, which provides the theoretical basis for the improvement of the load-carrying capability and the structure design of board. This paper have conducted a parametric design, finite element analysis and the topology optimization design for a motional board of the injection molding machine using “Advanced simulation” of NX8.0, and get a quantitative conclusion of that the motional board volume is reduced and its stiffness is significantly enhanced.
Vehicle Braking Stability Analysis in Turn Condition
Authors: Zhao Ling
Published: July 2014

Considering the influence of wheel vertical load transfer and Steering angle, the paper establishes a dynamic model of 7 degrees freedom for vehicle under Braking in Turn Condition. Based on this model, wheel lock braking and ABS braking were researched and simulated. The simulation results show directly that first lock of front wheel loses vehicle steering performance, first lock the rear wheel sideslips, ABS braking can prevent loss of vehicle steering performance and sideslip, but slightly long braking distance.
Simulation on the Life Expectancy of Fine Blanking Tool Punch for High-Strength Automobile Start Motor Flange
Authors: Kim Jong Deok , Ko Hyun Jun
Published: July 2014

Fine blanking is a press-working process that permits the production of precise, finished components which are cleanly sheared through the whole cutting surface. The manufacturing cost can be reduced because the secondary operations such as milling and broaching can be eliminated and the multistage combined stamping process can be added. The product cost can increase, however, while the precise fine blanking tool and high cost fine blanking press are required. Therefore it is important to design the fine blanking tool in view of the life expectancy of the punch. In this paper the fatigue simulation of fine blanking tool punch for automobile start motor flange was conducted using the commercial FEA software ANSYS. Initially, the material properties were tested and the fine blanking tool was designed for production experiments. The modelling of tool elements and the fatigue simulation according to repeated loads were conducted. As a result of fatigue simulation, the fine blanking tool punch for start motor flange had been fractured with 3,981 strokes. In the fine blanking production experiments, the fine blanking tool punch had to be regrinded after it was used with 3,425 strokes. It was also found that the fatigue simulation of fine blanking tool punch was conducted with an error of 14%.
The Design of Electromagnetic Preheating Unit for Vehicle Engines
Authors: Yan Jun , Cui Shi Tang , Zhang Feng
Published: July 2014

After a study on the existing preheating scheme of vehicle engines, we propose to design an onboard electromagnetic preheating unit. Connected to 220v power, the unit may generate a high frequency alternating magnetic field through rectification and inversion. It will heat the engine cover directly and constantly to conduct heat to the engine and its oil so that the temperature rises up to meet the conditions for vehicles to start up.
Study on 3D Model Reconstruction of Vehicles from 2D Images
Authors: Zhang Huai Shan , Gao Guan Bin , Li Bo
Published: July 2014

Abstract. Currently, traffic law enforcement agencies rely mainly on the license plate to identify illegal vehicles. But for those vehicles with no license plates or license plates are obscured or slipped, the existing techniques do not work. In this paper, a method to reconstruct the external dimensions of vehicles from 2D images is therefore proposed to identify those illegal vehicles above. The external characteristics of vehicles and methods to model vehicles are analyzed. Based on the analysis, we simplified vehicles as a combination of a rectangular parallelepiped and trapezoidal polyhedron which can be produced with corner points from 2D images. The process to establish the vehicle model with corner points is studied. Finally with Visual C++ and SolidWorks API, the 3D model of a vehicle is established based on a 2D image. The vehicle's primary outlines information including length, width and height are restored, and the information can be used to identify the vehicle.
The Design of Online Measurement System for Polyurethane Sheet
Authors: Liu Wei , Wang Ling Long , Du Chang Jiang
Published: July 2014

The polyurethane sheet is an important part of automotive interior trim. For a long time, the measurement and recording are both accomplished by hand. It has problems such as low measuring precision, low working efficiency. Accordance with the existed problem of polyurethane sheet measurement, we developed an online measurement for polyurethane sheet and code-spurting system. The system measures the thickness through two channels using laser displacement sensors. PLC collects data and controls the alarm device. Weighing is completed by belt scale and weighing instrument PT650D. Host computer software communicates with slave computer through serial interface. It not only makes data processing and storage function true, but also can make database operations such as data query, statistics and so on. In order to be convenient for quality tracing, the system sets and prints a number for each block. It also can print irregular information such as thickness and weight.
Eye Movements as a Means to Evaluate Operation Interface of Flat Knitting Machine
Authors: Liu Zhi Hui , Wang Sheng Ze , Shen Qiong , Feng Jia Jun
Published: July 2014

This study investigates the characteristics of eye movements by operating flat knitting machine. For the objective evaluation purpose of the flat knitting machine operation interface, we arrange participants finish operation tasks on the interface, then use eye tracker to analyze and evaluate the layout design. Through testing of the different layout designs, we get fixation sequences, the count of fixation, heat maps, and fixation length. The results showed that the layout design could significantly affect the eye-movement, especially the fixation sequences and the heat maps, the count of fixation and fixation length are always impacted by operation tasks. Overall, data obtained from eye movements can not only be used to evaluate the operation interface, but also significantly enhance the layout design of the flat knitting machine.
Finite Element Analysis of Gold Bonding under Different Loading Conditions
Authors: Tang Wen Liang , Huang Chun Yue , Li Tian Ming , Liang Ying , Xiong Guo Ji , Wu Song , Li Chun Quan , Ning Zhong Ping
Published: July 2014

In this paper, ANSYS-LSDYNA simulation software is used to build the three-dimensional finite element model of the ball bond and to get the Von Mises stress. The change of stress about the bump is researched which base on the model in different bonding pressure, bonding power and bonding time. The result show that: The stress increase with bonding pressure increase within a certain bonding pressure range, and then the stress will maintain a table number, however, the stress will continue to increase when the bonding pressure reach a certain value; increasing the bonding power, the area of lager stress will grow; prolonging the bonding time, the stress of the pad will increase with time, but when time increase to a certain value, the stress of the pad will not increase over time.
Analysis of Laminated Composite Plates by Local Inverse Multiquadrics Collocation Method
Authors: Xiang Song
Published: July 2014

In present paper, deflection and stress of laminated composite plates are analyzed by a meshless local collocation method based on inverse multiquadrics radial basis function. This method approximates the governing equations based on first-order shear deformation theory using the nodes in the support domain of any data center. Transverse displacement, normal stresses, and shear stresses of the simply supported laminated composite plates under sinusoidal load are computed by the present method. The convergence characteristics are studied by several numerical examples. The present results are compared with available published results which demonstrate the accuracy and efficiency of present method.
The Research of Kinematic Model in the Rehabilitative Training System
Authors: Wang Qiang , Ji Run
Published: July 2014

This paper provided a new method of controlling the rehabilitative training system for the patients with upper limb movement disorder. On the basis of the computer through the patient's healthy limb motion gesture motion parameters, analyzed the kinematic model of human upper limb joints, obtained the kinematic parameters of upper body. Study the establishment of different categories of patients with upper limb virtual computer model system for the detection of relevant parameters. And according to the requirements of upper limb rehabilitation training for patients with upper limb rehabilitative training system, researched the dynamics model of human upper limb, and indicated a method which may provide scientific and effective training methods to recover function rehabilitation for patients.
Probabilistic Approach to Mobile Robot Localization Based on Gaussian Models of Sensors
Authors: Duchoň František , Babinec Andrej , Rodina Jozef , Fico Tomas , Hubinský Peter
Published: July 2014

In this paper the probabilistic approach to mobile robot localization is discussed. Generally probabilistic localization uses some type of sensors model. In this paper Gaussian model, which is the most appropriate probabilistic model of the sensors, is used. The main body of the article deal with the proposal of own approach to probabilistic localization, which is inspired by Markov localization. That is why the Markov localization is described in the introduction of the article. At the end of the article several experiments with the real robot are described. Results of the experiments have proven that proposed localization is accurate, fast and reliable.
The Computation of the Effective Temperature of the Land Surface Covered with Canopy
Authors: Ma Hong Zhang , Liu Su Mei
Published: July 2014

—Surface soil moisture is an important parameter in describing the water and energy exchanges at the land surface/atmosphere interface. Passive microwave remote sensors have great potential for monitoring surface soil moisture over land surface. The objective of this study is going to establish a model for estimating the effective temperature of land surface covered with vegetation canopy and to investigate how to compute the microwave radiative brightness temperature of land surface covered with vegetation canopy in considering of the canopy scatter effect.
Variable Parameters-Based Damage Creep Model of Weak Rock Layer and its Engineering Application
Authors: Yang Wen Dong , Chen Jin Ping , Sun Feng , Zhang Yan Mei
Published: July 2014

In order to study the deformation mechanism of the weak layer in diabase dikes under long-term loading at a hydropower dam foundation, in situ plate loading tests were performed. A damage creep model which improved the five-parameter generalized Kelvin model was established to describe the creep behavior of the weak layer. In this model, the deterioration effect of the rock parameters is considered and the creep parameters of the rock deteriorate gradually. This model is applied in a slope design for a dam foundation at a hydropower station. Long-term stability of the slope after excavation is evaluated. It shows that when damage creep is considered, the displacement is larger compared with the case of ignoring damage creep. The study shows that the deterioration effect of the rock parameters is of full importance for the project design and construction safety.
Review of Analysis Model on Three-Dimensional Braided Composites
Authors: Chen Hai Yan , Wei Gao Feng , Xu Yan
Published: July 2014

Because reinforced-fiber has characteristic of single step forming in three-dimensional braided composites, analysis of mechanical performance is very different from laminates. This paper proceeds from the micro-structure of 3-D braided composites, some review and research are presented detailedly, and the several model’s merit and demerit are analyzed, which can conduct dynamicists to choose reasonable numerical model. The mechanical performance can be predicted accurately, and the next research can be guided using above analysis.
Numerical Analysis of the Iced Transmission Line Galloping
Authors: Qin Li , Xu Tian Yuan
Published: July 2014

By used the assumed mode method to simulate the iced transmission line galloping,with three generalized coordinates to represent the iced transmission line galloping. In order to avoid the complicated calculation of vector,used the Lagrange equation to build the nonlinear equations of iced transmission line from the perspective of energy,used the Runge-Kutta numerical calculation to solve the equations of motion and get the iced transmission line’s across-wind,along-wind and the torsional response. Based on Lyapunov stability theory to deduce the critical wind speed of the iced transmission line galloping. And had used a test iced transmission line to verify the feasibility of the numerical solution and the critical wind speed.
Numerical Study on Bending Behavior of Copper Alloy Thin Plate by Single Pulse Laser
Authors: Jiang Su Qin , Liu Ai Hui , Wang Xue Ting , Wu Jian Hua , Li Bo Kui
Published: July 2014

To study the bending characteristics of copper alloy thin plate by single pulse laser, the thermal mechanical coupling model of pulsed laser forming (PLF) was established; the dynamic change and steady distribution for the fields of temperature, stress& strain and displacement were analyzed. The results show n that during the pulse laser heating stage, the temperature gradient along the thickness direction is far less than that of the heat affected zone; due to the constraints of materials around the heating field, the compressive stress and negative strain are appeared, the cantilever end of sample produces warping deformations; in the cooling stage, the temperature of top and bottom surface material drops rapidly, the sample is with a negative bending and reduced deformation. This is related to the transferring of the stress change and the recovery of part of the elastic deformation in heating area.
Condition Assessment for Power Transformer Based on Improved Evidence Combination Rule
Authors: Miao Fei , Ren Jian Wen , Wei Jun Jiao
Published: July 2014

In view of the uncertainty transformer state information, state of transformer hierarchical evaluation model is established. Firstly, index system of transformer state is formed; Secondly, in order to get comprehensive index of state, grey clustering method is used for monomial index clustering analysis; Finally in the basis of improving synthesis rules of conflict evidence of D - S evidence theory , clustering coefficient is used as the basic probability assignment function to evaluate the overall state of transformer. Example analysis results show that the proposed evaluation model can accurately grasp the running state of transformer and provide guidance for transformer condition overhaul.
Research on Foronline Short-Term Risk Assessment of Power System with Fast and Accurate Analysis Method Based on State Space Division
Authors: Li Hai Nan , Zhang Jian Hua
Published: July 2014

This paper proposed a state space division method to assess the online short-term risk of power system fast and accurately. This method divided all the possible operation system states into two mutually complementary subspaces according to the occurrence probability. In order to shorten the time-consuming, different method was used to calculate the risk of each subspace. Analytical method (AM) was used to calculate the risk of the first subspace comprised with the large occurrence probability states, which was identified using the Fast Sorting Technique (FST). System states that have a small occurrence probability comprised the second subspace, whose risk was calculated using Monte Carlo Simulation (MCS) combined with the adaptive importance sampling technique (AIST) and scattered sampling technique (SST). Through the case studies conducted on the MRTS, it is validated that the proposed method can assess the online short-term risk fast and accurately.
Influence of Wind Farm with PMSG Type on Small Signal Stability of Power System
Authors: Zhang Jian Chao , Zhu Xiao Rong , Zhao Wei
Published: July 2014

In order to study the small signal stability of power grid after grid-connection of large-scale Permanent Magnet Synchronous Generator (PMSG) wind farms, the mathematical model of PMSG was established. By means of simulation on a simple power system, the damping characteristics of grid under different wind power penetration and different access location of wind farms were studied in detail. Simulation results show that along with the increase of wind power, the inter-area oscillation mode damping would reduce. When wind farm was attached the receiving area, the inter-area oscillation mode damping was lower than it when wind farm was attached the supplying area.
Reactive Power and Voltage Coordinated Control Research of Wind Farm Adopting Doubly-Fed Induction Generators
Authors: Zhao Wei , Zhu Xiao Rong , Zhang Jian Chao
Published: July 2014

For the wind power grid voltage control problem, this paper proposed a reactive power and voltage control strategy by coordinate the wind farm reactive power source. Considering wind internal loss and the machine voltage deviation, established a optimal control model and a objective function, using the improved particle swarm optimization (PSO) algorithm to solve the function, the control strategy can reduce the wind internal loss and stabilize the voltage of the machine on the basis of meet the requirements of PCC voltage. The example simulation proved the effectiveness and economy of the control strategy.
Introduction and Study on Protective Relaying in Power System
Authors: Fan Yan Li , Li Qing En
Published: July 2014

Relaying protection is very important for electric system, in order to ensure electric system normal usage, the safeguard procedures are needed. The protective relaying is main and active manner. The protective relaying significance and equipment employments and maintain is analyzed in this paper, and protective relaying technology developing prospect is also introduced in this paper.
Detection Method of Magnetically Controlled Reactor as Excitation Device
Authors: Wang Cui Zhi
Published: July 2014

Magnetically controlled reactor as excitation device fault detection is an important measure to realize the technical index of the product,and is an important link to ensure reliable performance of the device. With the extensive application of the reactor, the excitation device is faced with all kinds of complex environment conditions, in order to ensure the quality of the excitation device, to ensure that the magnetically controlled reactor to long-term and stable operation, so it must be the fault detection of the excitation device. Combining with the production practice, It gives a variety of device Magnetically controlled reactor as excitation device fault detection method in the paper.
Study on Well Logging Technology with Methods of Evaluating Gas Content of Coal-Bed Methane Reservoir
Authors: Yang Huai Jie , Pan He Ping
Published: July 2014

In this study, the well logging response of CBM reservoir have been analyzed, and discussing the factors that affect the gas content of coal seam. The well logging technology has been employed in connection with log data and gas content. Take one oilfield’s well logging data for example, statistical analysis method and Langmuir equation method are selected to calculate the gas content of one coal seam, the two calculated results are basically the same, the highest value are about 26 cm3/g, is a high-yield coal seam.
A Detection System of Impurity in Transparent Liquid
Authors: Huang Bin , Wang Ping , Ma Si Le
Published: July 2014

In the fields of transparent liquid impurity detection based on machine vision technology, how to effectively detect impurities in the liquid is a difficult problem which has not yet been solved, mainly in the low recognition rate, the slow recognition speed, and the phenomenon of error detection and undetected. Therefore, this paper presents a new impurity detection method. Firstly, the hardware structure of the system is introduced in this paper. Then the flow diagram of impurity detection is presented. Finally, the algorithm of impurity detection is studied. Experiments show that the system introduced in this paper can identify impurities in liquid well on condition of ensuring the detection speed and detection accuracy.
Design and Implementation of an Intelligent Cleaning Robot Based on Fuzzy Control
Authors: Liu Hai Yan
Published: July 2014

Nowadays, intelligent cleaning robot is widely used in housecleaning, hotel and office for cleaning in a half--automatic way or full--automatic way. In recent years, the development of cleaning robot has brought increasing attention in overseas and domestic, and it has become a new development area in the field of service robots. This paper designs an intelligent cleaning robot, which could realize move freely under the control of obstacle avoidance strategies based on the fuzzy logic. According to the information of obstacles from the sensor system, the obstacle avoidance system is built by the fuzzy control method to make the cleaning robot avoid the obstacles autonomously.
Research on Applied-Information Technology with PM2.5 Generation and Evolution Model Based on BP Neural Network
Authors: Xie Ying Hong , Han Xiao Wei , Li Qi
Published: July 2014

In this paper, BP neural network model is used to establish the occurrence and evolution model of PM2.5 in an area in Xi'an city. In the model, wind, humidity, season, SO2,NO2,PM10, CO,O3 (in one hour ) and O3 (in eight hours ) and other influence factors are all considered. The model has good reliability, it can accurately forecast the value of PM2.5 and its variation in the near future, which can provide the basis for the PM2.5 control.
Research on Applied-Information Technology with Application of Data Mining in Analysis of Consumer Behavior
Authors: Fan Feng Long , Li Xu , Yu Xu Sheng , Wang Li
Published: July 2014

With the development of computer technology, especially the rapid development and extensive application of database technology and computer network technology, the data quantity increases sharply, the accumulation of a large number of data in various fields, and rising fast. Enterprise database or data warehouse has stored a large number of customer data, these data include many aspects of the information of customers, but also contains the advantages and disadvantages of the enterprise operation. If we can use these data quickly, efficiently in-depth analysis and research, to find the rules and modes, to obtain the necessary knowledge from it, will help enterprises to better decision making. The system can successfully excavate students and staff of the tendency of consumption and consumption habits, analyze their satisfaction with each restaurant. The results of system analysis to a certain role for school students and teachers to understand and analyze the condition of daily consumption, so the establishment of this system has great practical value.
Applied Technology in "GNSS if Signal Acquisition System" and Software Receiver Design
Authors: Yang Yu , Yang Chang Lin , Liu Yan Fei
Published: July 2014

The paper completed the software and hardware design of GNSS intermediate frequency signal acquisition system under Linux operating system, realized the GNSS software receiver under Linux. Basing on QT C++ graphical user interface application development framework and Qwt plug-in, the software and data graphical display interface was also accomplished. By caching the data of RF module and controlling read and write signals of CY7C68013A through FPGA, the high-speed data transmission function was completed. The test results show that the data transmission rate of this data acquisition system can reach more than 200 Mbps, software receiver satisfies the requirement of positioning accuracy, has good flexibility and higher adaptability, and the algorithm of which was easy to be expanded and upgraded.
Design of Embedded Video Monitoring System Based on DM6437
Authors: Fang Hao , Li Ai Hua , Liu Yan Fei
Published: July 2014

To solve the difficulty of traditional video monitoring system in system upgrade and expansion, an solution of embedded video monitoring system based on DaVinci technology was put forward in this paper. By building the monitoring platform by DM6437 and DSP/BIOS in the solution, TVP5151 was used for receiving video signal in PAL/NTSC formats, and an JPEG Baseline Profile Encoder was integrated for video encoding, and the 10/100M Ethernet transmission function was realized based on NDK. Finally, the system is tested and the result shows that the system can capture and transmit D1 format signal in 25f/s and met the real-time requirement. At the same time, the system is easy to use and expand with a bright application prospect.
Guided Waves Propagating Analysis in Hollow Cone
Authors: Yin Xiao Hu , Qiao Jin Wei
Published: July 2014

Cone-like pipes are serving in some special area, not common but always pivotal. In order to extend the ultrasonic guided wave detection technique from hollow cylinder to hollow cone, this paper make numeric analysis on both of them. Firstly, some basic theory about the guided waves and related simulation method were introduced. Secondly, a standard hollow cylinder was selected and made simulation for proving the validity and obtaining a group of pre-set parameters for following cone simulation. After that, the simulation about the hollow cone was made and its results were presented. At last, some conclusions were found by comparing the results of two different simulations. The guided waves propagating in hollow cone exhibit a slower velocity, a quicker dispersion ration and a more noisy background.
Research on Photochromic Materials with Synthesis and Properties of 1-(3,5-Dimethyl-4-isoxazolyl)-2-[2-methyl-5-(p-ethoxyphenyl)-3-thienyl]perfluorocyclopentene
Authors: Liao Guan Ming , Xue Dan Dan , Zheng Chun Hong , Pu Shou Zhi
Published: July 2014

An asymmetrical photochromic diarylethene 1-(3,5-Dimethyl-4-isoxazolyl)-2-[2-methyl-5-(p-ethoxyphenyl)-3-thienyl] perfluorocyclopentene (1o) was synthesized and its photochromic properties were investigated. Upon irradiation with 297 nm UV light, 1o exhibited photochromism in hexane solution. The kinetic experiments showed that the cyclization and cycloreversion processes were zeroth and first order reaction, respectively. Moreover, diarylethene 1o also exhibited obviously fluorescence switches along with the photochromism.
Research on Permeability Upscaling Based on Numerical Rock Core and Geomechanics
Authors: Niu Cong , Li Dao Lun , Lu De Tang
Published: July 2014

Basing on pore structure obtained with CT, Navier-Stokes numerical simulation of fluid flow in the rock core was carried out. The calculated result of the simulation, was further applied in the core permeability determination. To further understand the flow behavior and upscaling mechanism, analysis of pore throat distribution in the core was carried out, and effect of pore structure on upscaling was discussed. Results show that commonly used permeability upscaling method didn’t show good results when pore size varies greatly. Considering this situation, a weighted average method for permeability upscaling is presented which can address this problem.
Synthesis and Properties Study of 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(9-phenanthrene)-3-thienyl] perfluorocyclopentene
Authors: Liu Jing Jing , Jia Hong Jing , Pu Shou Zhi
Published: July 2014

A novel photochromic diarylethene bearing a pyrimidine moiety, 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(9-phenanthrene)-3-thienyl] perfluorocyclopentene has been synthesized. Its properties, including photochromic behavior and fluorescent properties, have been investigated. The compound exhibited remarkable photochromism, changing from colorless to red after irradiation with UV light in solution. The fluorescence had a remarkable initial increase with subsequent dramatic decrease with increasing concentration. The results indicated that the pyrimidine moiety played a very important role during the process of photoisomerization reactions.