bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of the Deviate Method of Minimum Subordinative Degree on the Selection of Outstanding Graduates
Authors: Si Jin , Yu Hai Zhu , Chai Xiao Li
Published: September 2014

How to objective, fair, justice, open selection of outstanding graduates is an important work in universities and colleges each year. For college students, the selection of outstanding graduates is the comprehensive consideration of university study and life in the four years, which is critical to the development of future employment and career. First, this paper introduces the basic principle method of minimum subordinative degree, and then considers the effect of college students through a variety of learning activities comprehensively. Finally, application examples are given in the selection of outstanding graduates. The results show that, this method is a good effective tool to solve the fuzzy uncertainly factors for complex decision problems, which has good applicability.
Application and Prospect of Cloud Computing Technology in the Network of Fitness
Authors: Wu Hong Jiang , Zhao Hai Yan , Ma Tie , Du Yu Yang
Published: September 2014

This article analyzes the network introduced in the fitness advantages of cloud computing technology based on the construction of the current status of network resources, services, fitness and mechanism. And fitness areas of the network cloud application prospects are also discussed.
A Design of Position Closed-Loop Control System for Hybrid Stepping Motors Based on Mechanical-Sensorless Rotor Position Detection
Authors: Zhou Yu , Cheng Zhang Ge , Tuyu Xiao Ying
Published: September 2014

In a stepping motor, the flux linkage with a phase winding is a function of rotor position and phase current. Employing inductance saliency to detect rotor position is suitable for hybrid stepping motor (HSM) for its saturation feature. This paper will introduce a position closed-loop control system for HSM with rotor position detection by monitoring chopping characteristics, and present simulation results based on Matlab/Simulink.
The Research on the Impact of High-Speed Railway
Authors: Hua Shi Yu
Published: September 2014

High-speed rail has the characteristic of large investment and a long payback period,so it is necessary to study the economic benefits of high-speed rail. In this paper,we use “With and without compare method” to analyse the economic impact on the areas along Beijing-Tianjin intercity and Wuhan-Guangzhou High-speed Railway,and try to verify the impact on the regional economy of high-speed railway in China.
Research of Oral Test Reliability and Validity of College English Based on the Computer Technology
Authors: Li Hui
Published: September 2014

Oral English teaching is the law of language teaching, which is not only the necessity of college English teaching reform and development but also a reflection of social needs. After college English graded teaching, oral test was incorporated into the scope of the final exam of many colleges and universities. In-depth discussion of computer-assisted oral English test reliability and validity has the practical significance.
The Machining Simulation of High-Tooth Logarithmic Spiral Bevel Gear
Authors: Li Qiang , Yan Huan , Yan Hong Bo , Li Li
Published: September 2014

Logarithmic spiral bevel gear is the spiral bevel gear whose tooth line is logarithmic spiral line. It helixes angle along the direction of tooth length equal everywhere. Due to the high-tooth spiral bevel gear has significant advantages of high transmission stability, these gear are more widely used in our country, especially in the transport sector. But compared to general spiral bevel gear, its complexity space meshing theory leads that it is different to process. In order to ensure that machining process is reasonable and achievable, we show that how to create tools, geometry and procedures and calculate the tool path simulation based on Siemens UG CAM.
Finite Element Analysis of Air Transportation Load-Unload Platform’s Frame Using ANSYS
Authors: An Hong , Wang Kun , Liang Chen Guang , Guo Yu Rui
Published: September 2014

Create 3D entity model of the loader’s frame in Solidworks, assemble the frame and then import in ANSYS to get the finite element model of the frame, and use ANSYS to analysis the frame at 5 Static characteristics of different conditions. The analysis indicates that the design scheme of the frame is feasible, but need to increase the stiffness of the structure in some parts.
Vector Control of Permanent Magnet Synchronous Motor Based on Parameter Identification Technique
Authors: Zhu Jian Guang , Wang Xiao Chen , Hou Xiao Dong
Published: September 2014

Real-time accuracy of the permanent magnet synchronous motor (PMSM) parameter directly affects the performance of the servo system. In this paper, the model reference adaptive parameter identification method, the parameters of permanent magnet synchronous motor running as the actual model , the mathematical model derived from the equation of state in the d, q coordinate system as the theoretical model , in order to calculate the real-time stator resistance , inductance and rotor flux value . Thereby increasing the accuracy of the vector control .Using simulink simulation results show that, The system can quickly and accurately calculate the real-time parameters and the applied control.
A Remote Intelligent Control System Based on Zigbee Wireless Technology
Authors: Cai Guang Hui , Liang Chuan , Huang Qian , Yuan Ying
Published: September 2014

Firstly, the Zigbee wireless technology, uCOSII real-time operating systems, gateways and other techniques were studied, and then Cortex-M3 core processor, equipped with running uCOSII operating system to set up an internal wireless network Zigbee module to achieve the end nodes of data acquisition and node control, and ultimately design and implement a remote temperature control and infrared remote control, users can realize temperature control and remote air conditioning temperature regulating heater remotely via a PC or a mobile terminal. The system is real-time, high stability, can be applied to the field of industrial control and remote areas such as intelligent home.
SCR Experimental Study on Reducing NOx Emission of Diesel Engine
Authors: Ma Jun Yan , Qu Da Wei , Li Jun
Published: September 2014

NOx emission of diesel engine is an important pollutant to the environment, in the bench test of SCR technology for the diesel engine NOx reducing effect. Diesel engine NOx to ESC test cycle emission by 10.73,down to 3.24; ETC test cycle of the diesel engine NOx emission decreased from 9.533 to 2.98, the diesel engine emissions to meet Euro IV emission standards. Experimental results showed that SCR can effectively reduce NOx emission of diesel engine and the pollution of the environment.
Nozzle Opening Time’s Impact on Flow Characteristis of SSCR
Authors: Qu Da Wei , Liu Shao Hua , Fan Lu Yan , Ma Jun Yan
Published: September 2014

SSCR system is different from traditional SCR on the source of the NH3 produced, with the method of ammonium salt decomposition into NH3, directly spraying the NH3 into the SCR catalytic box to react with the NOx in the auto exhaust. So on the structure, new SSCR replace the Urea nozzle with a NH3 nozzle. The nozzle flow rate is related with the nozzle opening time, frequency and the back pressure and so many other factors. So in our experiment, we completed the control strategy of nozzle opening time on Mototron platform, and using the method of drainage obtained the experimental data of the nozzle flow rate.
Variable Working Condition to the Influence of the Centrifugal Fan Impeller Wear
Authors: Kong Qing Jie , Li Long Hua , Wang Jia He , Li Jian
Published: September 2014

This paper makes use of the FLUENT to the variable working condition centrifugal fan on the gas-solid two phase flow numerical simulation, the numerical simulation adopts the whole flow field simulation, makes the use of surface source, analysis working condition changes on centrifugal fan blade pressure surface wear, finally it draws a relatively high-quality fan operation condition and takes measures to control fan wear in view of the situation.
Aerodynamic Characteristics Simulation Analysis of a Certain Type Changed Wing Drone Aircraft Based on CFD
Authors: Ma De You , Xu Ming , Chen Zhao Tao
Published: September 2014

This paper aims at the change of the whole machine aerodynamic characteristics after a certain conventional type drone aircraft changing plateau type large wings , using CFD technology to establish the nomal type and plateau type model, doing numerical simulation calculation of the whole machine's aerodynamic performance under the condition of no-load, using the simulation calculation results and combined with actual flight data, compared and evaluated the aerodynamic characteristics of the drone aircraft installed different airfoil, the results show that change plateau type large wings, obviously improve the lift-to-drag performance of the whole machine, increase the range of effective attack angle, and the little change of flight performance, scientific and feasible.
Improved Modular Design of Remote Controller
Authors: Yang Shuai
Published: September 2014

Nowadays, a lot of household appliances enrich our life, their mode of operation transform from machine to remote controller. Remote control has become indispensable tool in our life, each kind of electrical appliances have its own remote controller but too much remote controllers always make inconvenience. This paper uses the idea of modularization to improve the design of infrared remote controller. With the development trend of remote controller, we obtain inspiration of mode from bamboo slips and study on how to create a new modular remote controller that can be suit for a variety of electrical appliances at the same time based on ergonomic, we propose the solution finally.
Design of a Vending Machine Control System
Authors: Yang Hai Yan , Zhu Xiu Mei
Published: September 2014

The vending machine is the commercial automation equipment which can complete the vending without people. It is a production of social transformation from the labor-intensive to technology-intensive industry structure. This topic using Mitsubishi PLC FX2N - 32 MR controlled the vending machine control system, improved the stability of the vending machine system, make sure the vending machine can long-term and stable operation.
Relevance of Correlation Dimension and Kolmogorov Entropy in the State Discriminant of Gearbox
Authors: Mao Xiang Dong , Yuan Hui Qun , Sun Hua Gang
Published: September 2014

This paper introduces the basic principles and calculation methods for the correlation dimension and Kolmogorov entropy. By calculating the correlation dimension and Kolmogorov entropy when the gear is under different working conditions, we can analyze the inherent relationship between the two in depicting of the running condition of the gearbox. The result shows that,the correlation dimension and Kolmogorov entropy have a good consistency in the description of working status of gearbox. This conclusion not only provides a good basis for the gearbox running condition judgment and fault diagnosing, but can also provide the experimental basis for the chaotic characteristic parameters selection in state monitoring and fault diagnosing.
Modeling and Friction Effect of Shipborne Tracking Antenna Servo System
Authors: Zhu Dong Xu , Wang Xin Rong , Zhang Gui Ping
Published: September 2014

In order to improve the friction nonlinear perturbation effect on shipboard antenna tracking, first to a certain type of ship azimuth servo system as an example, considering the establishment of a mathematical model with friction, and the model is carried out using PID control method. The results show that with friction disturbance considered, there are tracking exist "flat top" phenomenon and large tracking error, and when the speed is low, there is the "crawl" phenomenon.Keywords: ship servo system, friction disturbance, disturbance compensation
Analysis of Factors Influencing Velocity Difference of Heavy Oil Reservoir Gravity Drive
Authors: Li Zhen Dong
Published: September 2014

Based on the assisted gravity draining steam flooding and the development technology of drive drain compound, using computational fluid dynamics software ANYSY CFX to analyze the impact of the oil reservoir thickness、density of the crude oil 、oil viscosity and oil saturation on the seepage velocity difference. Research shows that: These factors have a significant impact on the flow velocity difference Research results provide reference for seepage study of gravity drive of heavy oil .
Research on an Electronically Controlled Gas Fuel Injection Device Using Moving Coil and Mushrooms Type Valve
Authors: Ge Wen Qing , Zhao Yan Jun , Li Bo , Sun Bin Bin
Published: September 2014

The electronically controlled injection device with perfect performance is a key technology to heavy-duty gas fuel engine. In this paper, an injection device using moving-coil electromagnetic linear actuator and mushrooms type valve was proposed and developed according to the special requirements of a heavy-duty gas fuel engine applied to power plant. The influence mechanism to the injection device’s flow rate characteristics caused by structural and controlling parameters was determined. And related bench tests of the heavy-duty gas fuel engine equipped with the injection system were completed. The results showed that the technical solution could meet the engine’s requirements of high flow rate and response.
Clock Synchronization Technology Research for Distributed Automatic Test System
Authors: Li Ming
Published: September 2014

According to the problem that test system synchronization accuracy requirements are increasing. This paper designed a precise time stamp measurement systems that use hardware at the bottom to join timestamp in order to eliminate software latency effects, point to point and multipoint timestamp synchronization via synchronization algorithm based on prediction.
Research on Improved PSO Algorithm Based on Contour Detection
Authors: Li Dan
Published: September 2014

In this paper, an improved PSO algorithm in unimodal, multimodal function can adapt quickly converges to a smaller fitness value. It’s suitable for complex non-linear environment. Combined with the adjusted Snake model can better convergence at the edge of the recess. Compared with other contour detection algorithms, this algorithm has better noise robustness, contour convergence accurate and efficient accuracy and efficiency.
Research on Target Tracking and Early-Warning for the Safety of Coal Mine Production
Authors: Li Zhan Li , Xie Ai Ling
Published: September 2014

In recent years, the technology of video surveillance, widely used in the coal industry, has become an important technical means in mine safety production and management. Movement monitoring of personnel and carrier is an important part in underground video monitoring and management. This paper firstly detects change region of moving targets through background subtraction and temporal difference. Detecting moving targets through binarization and morphological filtering, thus personnel and carrier are identified combining with shape feature and texture. The rest of this paper puts forward an improved particle filter method to recognize and track multiple moving targets. Lastly this paper gives an underground video example to monitor the underground video. The result of this paper shows that this method has great significance for mine safety production.
Research on the Key Equipment Performance of Stage Video Surveillance and Scheduling System Based on IP Network
Authors: Li Yi Hua , Zhang Xiao Dong , Feng Zhi Cong , Luan Zhen Hui
Published: September 2014

Audio and video technology, multimedia technology and computer network technology are used in the stage video surveillance and scheduling system based on IP network, which is modern stage surveillance system.The stage video surveillance and scheduling system plays a decisive role in performance, so the performance of the key equipments must be apprehended.In this paper, the components of the system are briefly introduced;then analyze needed of the pivotal equipments in detail: network video, streaming media server and the IP SAN performance.
Design and Realization of an Avionics Equipment Testability Model Based on TADS
Authors: Zhao Jing , Zhao Wen Jun , Zhang Qiang
Published: September 2014

The testability design becomes one of important works to do during a design process of a system and en equipment. Whereas, the testability labor of current avionics equipments are performed after design and most of its testability results are acquired by manual statistic. In this article, taking an aviation radio’s power supply model for example, a testability model is designed based on TADS and the scientificity and practicability of this model is testified by realizing fault separation by GPTS.
A Research on Tracing Method - Tracing Method of Quality Issues of Gearbox and Application of Rank Sum Test
Authors: Hu Hong , Li Lian Zhi
Published: September 2014

Tracing of quality issues of complex automobile gearbox is realized, defective parts and assembly procedures are analyzed and confirmed, analytical method for tracing quality issues is provided and the thinking is illustrated. Furthermore, the tracing model for assembly and quality issues of the gearbox is constructed based on inference principles of the rank sum test; the research results show that the analytical method is effective and feasible in tracing quality issues of the gearbox.
Rheological Property and Durability of High Strength Concrete Using Zeolite Powder and Microsphere
Authors: Gao Yu Xin , Lin Jia Chao , Cheng Bao Jun , Wu Xiong , Peng Yuan , Jia Li Li
Published: September 2014

The rheological property of fresh high-strength concrete (HSC) and mechanical properties, self-shrinkage and resistance to chloride ion permeability of hydrated HSC were studied on the basis of the closest packing theory. Results showed that the packing density of composite powder was the highest when the content of microsphere was 30.0%; when the content of zeolite powder added to concrete varied from 0.0% to 4.0%, the rheological and discontinuous property of concrete would be improved and its viscosity would be increased; meanwhile, compared to the standard concrete, the self-shrinkage of concrete with 2.0% zeolite powder at 1d, 3d, 7d and 28d was decreased by 77.1%, 49.6%, 44.0% and 38.1% respectively; finally, the resistance to chloride ion permeability of hydrated HSC with zeolite powder was improved with a result of 18.5% reduction of electric flux at 28d.
Study on Artificial Island Ground Improvement Method and Effect
Authors: Hou Jin Fang , Chen Ju , Yu Jian
Published: September 2014

The artificial island ground on an open sea is covered by thick soft soil. It must be improved before using. In accordance with a designing scheme, the ground treatment method is inserting drain boards on land and jointed dewatering surcharge preloading, the residual settlement is not more than 30cm after improvement and the average consolidation degree is more than 85%. In order to estimate ground improvement effect and construction safety, instruments are buried to monitor the whole ground improving processes. By monitoring settlement and pore water pressure, it is shown that the total ground settlement in construction is 2234mm, its final settlement is 2464mm, and consolidation degree and residual settlement respectively satisfy requirements. In ground improvement, horizontal displacement is small and construction is safe. Meanwhile, the results of soil properties and vane shear strength detection tests show the soft soil ground is greatly reduced in water content and porosity ratio, and improved in strength. It is named that the ground improvement method is reasonable and reaches expected effect.
Analysis on the Deflection of Cantilever Construction Based on Viscoelasticity
Authors: Peng Long Fan , Li Zhi Da
Published: September 2014

The creep of concrete in the construction process of deformation influential, especially in the cantilever pouring construction, short age of concrete, creep effect more apparent. Meaning for cantilever construction of Bridges, creep analysis must be properly considered section at different time of loading values and the concrete ages of different segments. In this paper, based on the viscoelastic problem of cantilever construction of concrete creep analysis method, analyzes the deflection of cantilever construction process of a rigid-frame bridge, and compared with the actual measured value.
Study on the Influence of Rubber Powder to the High-Temperature Behavior of OGFC
Authors: Liu Zhan Liang , Wang Li Zhong , Du Li Feng
Published: September 2014

This study research the influence of the rubber powder to the high-temperature behavior of the asphalt mixture. It shows that a certain dosage of the rubber powder has a good improvement to the high-temperature behavior of the base asphalt; meanwhile, if the partial mineral powder was replaced by the slaked lime, the high-temperature of the rubber powder will reduce.
The Sensitivity Analysis of Random Variable of Ribbed Cylindrical Shell Based on Strength
Authors: Yu Ying Xia , Liu Xiu Li , Zhang Wei
Published: September 2014

With all parameters being seemed as random variables with Gaussian distribution,and Latin Hypercube Sampling method being used, the strength of ribbed cylindrical shell is computed based finite element and Monte Carlo Method. By probability sensitivity diagram, scatter diagram and related coefficient, the sensitivity of random variable of ribbed cylindrical shell is analyzed based on the method of random sensitivity analysis. The results show that shell thickness, external pressure, frame spacing and internal radius are more sensitivity than the other variables, so these variables can be treated as sensitivity factors.
Ant Tracking for Fracture Interpretation in Carbonate Rock
Authors: Zhang Wen Qi , Li Chun Lei , Zhang Ming , Ding Wei , Qu Liang Chao , Sun Hua Chao
Published: September 2014

Carbonate rock fractures can be automatically interpreted with ant tracking technology based on ant track algorithm. Application by using ant tracking technology in the carbonate reservoir fracture interpretation and reliability verification with FMI fractures shows that ant tracking technology can not only interpret fractures good on plane and profile, but also has a good reliability.
AC and DC Motor Drives for AGV Comparative Experiments
Authors: Li Ai Ran , Fan Yu Jin , Han Teng , Li Zhe Kun , Zhao Pei Lin , Wang Jun Jie
Published: September 2014

All the drive motor of AGV are DC servo motor in the domestic stage , but it has some shortcomings such as more power consumption ,noise, magnet coils easy to burn, life is short and so on in the actual production. Through two series of comparative tests on the DC motor and AC motor driven AGV get two drive mode start time, start acceleration, top speed and other values.Through numerical processing and analysis know that AC motor as a AGV drive motor is better than Dc servo motor..
Analysis of Horizontal Air-Separator Field of Municipal Solid Waste Based on CFD
Authors: Zou Shu Liang , Liu Yi Qiang , Tang De Wen
Published: September 2014

The preceding separating technology of municipal solid waste is the premise and key to realizing waste comprehensive treatment and improving resource utilization. To the low efficiency of paper and plastic's separation, using the basic structural parameters of Horizontal air-separator, a finite element model is established based on Gambit software. Targeting at the pressure distribution and velocity distribution of the internal flow field under the condition of different wind direction and different wind speed, CFD is used for the analysis, and results shows that the wind angle between 15° and 20° and wind speed between 12 m/s and 14m/s is the optimum condition to get an ideal purity and efficiency of the light waste when winnowing domestic waste in the city of southern China.
Mechanism of Microwave Assisted Technique Acid Leaching Coal Gangue
Authors: Liu Cheng Long , Xia Ju Pei , Xie Yu Chong
Published: September 2014

The coal gangue are produced in a coal mine heap of Pan xian, Gui zhou, by using microwave assisted acid leaching methods and under certain reaction conditions, the products of different stages of acid leaching were characterized through different characterization methods like X-ray diffraction, scanning electron microscope and energy dispersive spectroscopy. The related process mechanism of Microwave assisted technique acid leaching gangue was preliminarily studied by the characterization results from analyzing the products of different stages of acid leaching.
Effect of Four Point Contact Slewing Bearing Groove Curvature Parameters on the Stress State
Authors: Mao De Sheng , Zhang Suo Huai , Guo Zheng Song
Published: September 2014

Applying the finite element method, the function of finite element analysis software AnsysWorkbench is powerful. Analysis 30 groups of different groove curvature radius coefficient model in extreme condition, obtained in applying extreme working conditions, stress and deformation data. Analysis results show that the inner groove curvature coefficient is 0.525, the outer ring raceway curvature coefficient of bearing is 0.52 when the slewing bearing shows maximum carrying capacity. Calculation, results provide analysis basis for slewing bearing design.
Finite Element Analysis on Tapered Roller with Logarithmic Profile
Authors: Guo Zheng Song , Zhang Suo Huai , Zhang Hao , Wang Hai Ming
Published: September 2014

Taking the type of a double-row tapered roller bearing of a high speed railway passenger coach as research object, the analysis for tapered roller with logarithmic profile has been done. Through the comparison of contact stresses at different crowning values by the finite element software has been done, the best crowning value has been got. There is a certain error between the theory of crowning value and the best crowning value by researching.
Investigation of Combination of Variable Diameter Rod Elements in Rod Matrix on High Gradient Magnetic Separation Performance
Authors: Ding Li , Chen Lu Zheng , Zeng Jian Wu
Published: September 2014

Rod matrix is effectively applied to separate fine weakly magnetic particles in pulsating high gradient magnetic separation (PHGMS), due to its reliable operation, simple combination and resistance to mechanical entrainment. They are now used to beneficiate oxidized iron ores, ilmenite, and wolframite, etc., and to purify wastewater. The combination of variable diameters rod elements in rod matrix plays a decisive role in recovery most of the different size fractions of magnetic particles, thus generating a significant influence on the performance of PHGMS. Combination of variable diameter rod elements in rod matrix on PHGMS is investigated in combination of 3 mm and 2 mm rod elements in rod matrix, by Slice-Matrix Analysis (SMA); it was found that the recovery of combinatorial rod matrix is higher than single diameter of matrix on PHGMS.
Activity and Reactivity Analysis of 4,4'-Dihydroxydiphenyl ether in Water Environment Based on Theoretical Calculation
Authors: Wen Jing Ya
Published: September 2014

Using the PCM/B3LYP method with the 6-31+G(d,p) basis set by Gaussian 09, the configuration of 4,4'-dihydroxydiphenyl ether in water was optimized, then the distribution of electrostatic potential, frontier molecule orbital (energy gap for transition) and reactivity descriptors were obtained by calculation and graphical analysis to analyze the activity and reactivity of 4,4'-dihydroxydiphenyl ether in water environment. The results have shown that: the 4,4'-dihydroxydiphenyl ether is found to be useful to both bond electrophilic and electrophobic group in water, especially the electrophilic ones; the energy gap for first-level transition of 4,4'-dihydroxy diphenyl ether is 0.36117 a.u, reflecting the low reactivity relatively.
Monitoring of Wear Particles during Running-In Diesel Engines of Tractors
Authors: Hönig Vladimír , Horníčková Štěpánka , Orsák Matyáš
Published: September 2014

The process of running-in machines is a significant period of operation of the machine. This is not uniform in material but also in terms of time. The article describes a specific individual storylines that just in the context of the run-run. It also describes the composition of individual particles that arise during this period, describing their size, morphology and diversity against the regime after running-in machines. The experimental part deals with the particle analysis method ferrography as a non-invasive technique. For analyzes were 3 tractor machines, which have been collected and assessed primarily levels and intensity of wear of individual samples taken from 0 to 15 mh. Were subsequently analyzed the running-in modes of individual machines and designed tribological verdicts.
New Research Progress in Activation of Steel Slag Activity
Authors: Wei Rui Li
Published: September 2014

Steel slag has potential hydraulic reactivity, it can replace raw material for making cement clinker, or directly product slag cement as admixture, but there is a problem that it has a lower activity as the admixture to produce slag cement. The reasons for lower activity of steel slag and motivation of steel slag activity were discussed in detail.
The Optimized Analysis of Recirculating-Ball Hydraulic Power Steering Gear Based on Orthogonal Experiment
Authors: Lin Zhao An , Mo Yi Wei , Huang Wei , Sun Yang Yang
Published: September 2014

To optimized the structure parameters of steering gear assembled in low speed truck,an orthogonal experiment is designed within rang of variation of the structure parameters,under the guide of vehicle handing and stability comprehensive evaluation indexes.One optimum parameter group is obtained by analyzing the influence of structure parameters on evaluation indexes based on the simulation of the established and verified model of the truck steering system.The optimum parameters group is demonstrated can be benefit to the vehicle handing and stability through contrasting the original structure parameters,and achieving the objective of power steering gear structure parameters optimized analysis.
The Research of the Submarine Torpedo Escape Emergency Decompression Technology
Authors: Tang Yao , Hu Pei , Du Jing Bin , Hao Qian , Xing Shi Long
Published: September 2014

Focus on the reliable problem which cannot implement emergency decompression during the torpedo tube escape practice, it is important that analyzes the key point of the emergency decompression technology, put forwards three method: drainage-decompression method, stability drainage method, water and gas displacement method, and make the computational analysis and compare the pros and cons in this paper.
The Research on Combustion and Emission Performance of Biodiesel - Diesel Blended Fuel
Authors: Hang Yu Jie , Xu Cang Su
Published: September 2014

According to the different volume ratios, soybean biodiesel is mixed with 0# diesel by 0%, 20%, 40%, 60% and 80%. These blends (B0, B20, B40, B60 and B80) are tested using Xinchai 490B diesel engine for their combustion and emission performance. It is concluded that output power first increases and then decreases as the volume ratio increases, while higher fuel consumption is presented. Meanwhile, smoke emission of B80 decreases remarkably up to 30.4% versus B0. NOX emission also increases slightly under engine external characteristic condition.
The Resistivity Logging Response through Casing of Six-Layer Formations
Authors: Wang An Ling , Liu Fu Ping
Published: September 2014

Because difference of formation model affects the potential distribution on the metal casing, the resistivity logging response can be obtained through casing by measuring the potentials on the metal casing. In fact, the logging responses are the comprehension effects of complex formation and metal casing, so that in the coefficients of transmission line equation, we should consider the effects of formation model in radial-direction. In the following, for the formation taking on six-layer in axial-direction, and step in radial-direction, the resistivity logging responses through casing are researched and discussed, and given the recurrence formula to compute potential. Draw the curve of the resistivity logging response through casing of six-layer formations. The conductivity of formation is computed is very approximating to that of formation model. The computing examples also show that this method has a fast computing speed (the run time of computing example is less than 1s). For analysis the logging response of six-layers and block formations, and the design of logging instruments, the research is important significance and useful.
Numerical Prediction of Shrinkage Defect in Aluminum Alloy Electron Beam Weld Based on Niyama Criterion Program
Authors: Liu Cheng Cai , He Jing Shan
Published: September 2014

The root shrinkage cavity (SCRT) is one special kind of high-energy welding defect which can remarkably decreases mechanical strength and induces fatigue crack, so it is of great significance to numerically study its formation mechanism. In this paper, a set of Niyama criterion program based on temperature field was developed and adopted to numerically predict it in non-penetration 2219 aluminum alloy electron beam weld. The results indicate that the formation possibility of SCRT defect decreases with the increased welding speed. In addition, the error of simulated SCRT in the weld penetration direction is 8.76%, while the error in the weld width direction is 23.46%, which shows good agreement with experimental comparison samples. All the simulation and experimental results validate the correctness and feasibility of the developed Niyama criterion program.
Influence Factors Analysis of Oil Depot Valve Internal Leakage Quantitative Inspection Using Acoustic Emission
Authors: Zong Fu Xing , Shui Ai She , Wang Hui
Published: September 2014

This paper aims at the oil depot valve internal leakage quantitative inspection using acoustic emission. On the basis of giving the valve internal leakage quantitative model, the main factors which effected quantification of leakage rates are theoretical analyzed and the relative error estimation model is presented. The influence of main factors on the accuracy of leakage quantitative model and the correctness of the relative error estimation model are verified by experiments. Finally, research mentality on how to improve leakage quantitative model is proposed.
Study on the Impact of Missile Flight Mach to its Engine Thrust
Authors: Liu Rui Qing , Jiang Yi
Published: September 2014

Rocket engine thrust is the main performance parameters. The flow field of missile fight in different Mach is simulated by using FLUENT, then calculating the thrust of different conditions. The calculating results are consistent with the theory of Mach almost no effect on the thrust.
The Design Method of Airfoils for Variable-Pitch Wind Turbines Based on Knowledge Engineering
Authors: Xie Huan , Zeng Wei
Published: September 2014

In order to make good use of the previous design knowledge, the knowledge-based engineering ideas were introduced to the design of airfoils for variable-pitch wind turbines, a new design method for airfoil of wind turbine was formed. Firstly, the structure-behavior-function (SBF) model of airfoils design was derived. Secondly, the neural rules for airfoils design of variable-pitch wind turbines were deduced. Thirdly, the design method of airfoils structure for wind turbines based on case-based-reasoning (CBR) was establishment. And the dimensionless model based on case representation was set up, and the algorithm of geometric parameters design for airfoils based on CBR was proposed at last.
The Effect of Inner Cylinder on Cyclone Preheater Using Fluent Software
Authors: Dong Li Long , Zhao Wei Lin , Wang Jian Rong , Geng Zong Jun
Published: September 2014

The paper presented the gas flow field and particle trajectory with a series of inner cylinders in cyclone preheater using RNG k-ε turbulence model and stochastic trajectory model on the platform of Fluent software. The separability and pressure loss of cyclone preheater were investigated. The result shows the ratio of d/D and h/H of cyclone preheater was advised 0.50 to 0.65 and 0.35 to 0.60 respectively. It is also found that the numerical simulation results are in agreement with the thermal data of cement plant.
Peak Gas Production Analysis and Influencing Factors Study of Coal Bed Methane Well
Authors: Ding Wei , Sun Hua Chao , Xia Zhao Hui , Hu Yun Peng , Kong Qiang Fu , Geng Yuan
Published: September 2014

The value of peak gas production and the time when it reaches are two important marks for coal bed methane (CBM) well’s gas production curve. This paper takes M CBM gas field of A country’s B basin as actual production instance. Firstly, based on the CBM producing mechanism, the existence reason of peak gas rate is analyzed; secondly, the influencing factors of the value of peak gas production and the time when it reaches is studied by numerical simulation method. And sensitivity order of the influencing factors is obtained. The study results indicate that: the value of peak gas production has positive correlation with properties: permeability, gas content, coal bed net pay and gas saturation; while negative correlation with desorption time and cleat porosity. And the strong to weak intensity of sensitivity is permeability, gas content, desorption time, net coal bed pay, cleat porosity, gas saturation. The time when peak gas production reaches is markedly influenced by the value desorption time and cleat porosity, the smaller of the two parameters, the shorter of the time when peak gas production reaches.
The Application of SIS Well to the Coalbed Methane Development
Authors: Duan Li Jiang , Xia Zhao Hui , Li Chun Lei , Liu Ling Li , Zhao Chao Bin , Zheng Ke Ning
Published: September 2014

SIS well is a successful technology for coalbed methane development. In this paper, the drilling and completion technology were introduced systematically on the aspects of optimization design of well profile, drilling equipment, drilling and completion technology of vertical well and horizontal well, and intersection technique of these two wells. Two new well patterns, i.e., commingled well and boat-shape well were also proposed. When application this technology to other areas, some improvement may should be made according to special geological data.
Analysis of the Effects of BioButanol and BioEthanol on the Vapour Pressure Gasoline
Authors: Hönig Vladimír , Orsák Matyáš , Horníčková Štěpánka
Published: September 2014

With the gradual introduction of biofuels II. generation, attention will be devoted to research and development of wider use of fuels of vegetable origin focused on the possibility of making and using better quality motor fuel than bioethanol. Biobutanol (n-Butanol, Butan-1-ol) is an alternative to bioethanol, which is currently commercially produced and used as a component of motor gasoline or as E85. The article introduces the principle of the evaporation of liquids and creating vapor pressure gasoline fuels with bioethanol and biobutanol. The release of particles from the liquid surface (evaporation) is a process that more or less is intensively carried out at each temperature. The saturation of vapor pressure in the system at a given temperature is at an equilibrium of gas and liquid phases. The introduction of biofuels as renewable sources brings with it a number of technical problems. The addition of bioethanol and other oxygenates in gasoline, is associated with a change in vapor pressure, which of course also applies to biobutanol. The analysis of the variance evaluates the vapor pressure characteristics of both alcohol fuels and their properties as a prerequisite for the potential introduction of biobutanol for commercial use as fuel in internal combustion engines. The article reviews the experimental analysis of the vapor pressure and selected compounds including the additives MTBE and ETBE.
Design, Simulation and Implementation of Elevator Controller Based on Precise Time
Authors: Li Xi Le , Wang Bei
Published: September 2014

This paper introduces the entire elevator controller making process based on the programmable chip EP2C8T144C8 through two softwares of QuartuesII and Altium Designer. It is different from the previous designs for the clocks of each part in this elevator controller all come from divisions of frequency of crystal oscillator, so that could be fully used. In addition, there is a lattice of 5×7 to achieve the state display. If the lattice makes the display run at 24 frames per-second, the human eye can catch it as a continuous image.Keywords: EP2C8T144C8, elevator controller, crystal oscillator , display lattice
Preparation of Non-Dendritic Microstructure of AZ31 Alloy Using Isothermal Heat Treatment of the Refined Billet
Authors: Xing Bo
Published: September 2014

Semisolid metal forming (SSF) has been regarded as a potential process to shape the wrough Mg alloy base on the thixotropy and low deformation resistance of non-dendritic semisolid slurry. Therefore, it is necessary to develop the slurry production method of wrought Mg alloy as most current researches are focused on the cast alloy. In this paper, the AZ31 billet was refined by the self-inoculation method, and the partialy remelt method was employed to produce the non-dendritic microstructure. Results indicate that both the morphology and size of the primary Mg phase in AZ31 were refined by the grain refining treatment. When the billet were reheated under 595°C and 610°C with different holding times, the morphology of primary Mg phase undergo an evolution pattern from rosette or tiny dendritic to spherical, and with the prolonged holding time, the size of primary Mg phase increased and the shape turn to irregular. Moreover, the result show that the high holding temperature shorten the evolution time from irregular to spherical and the deteriorative grains obtained earlier compared to the low holding temperature.
OPC Automation System Interconnection Interface
Authors: Sun Lei , Xing Hong Mei , Wang Wei
Published: September 2014

s. This thesis introduces core technology and methods of structuring the dynamic industrial equipment management system, which are technology foundation of building the system.
Analysis and Experimentation Research of the Static Compressive Mechanical Test of Foam Aluminum Composite
Authors: Lin Zhen Rong , Lai Yuan , Tian Yan Feng
Published: September 2014

In order to achieve function-structure integration and improve mechanical properties and energy absorption capability of the foam aluminum composite,foam aluminum filled with silicone rubber-modified epoxy resin was prepared.Static compression test shows that the platform yield stage of foam aluminum filled with modified epoxy resin is uplifted,the mechanical properties and energy absorption capability of foam aluminum are improved.The results are helpful to expand the application of aluminum foam.
Research on the Preparation of Magnesium Alloy Micro-Arc Oxidation Black Ceramic Membrane
Authors: Zhou Yi Qun , Gao Cheng , Shi Xiao Chao , Xu Jin Yong , Jiang Xun
Published: September 2014

Black ceramic membranes are made on the surface of AZ31B magnesium alloy to further study the micro-arc oxidation coloring ceramic membranes with more colors.In the system of sodium silicate - copper sulfate, black ceramic membrane with good compactness and uniform color can be made while the concentration of sodium silicate is 20g/L and the concentration of copper sulfate is 1.0g/L. Experimental results show that the chroma of the membrane varies from light color system to deep color system with the increasing content of copper aluminum compounds.
Analysis on Wireless LAN Security Issues and Security Implementation
Authors: Jiang Qing Chao
Published: September 2014

With the global population of informatization and digitization, network technology is playing a very important role in people's lives. The role of wireless LAN applications is especially significant. People's daily lives and work are no longer confined to paper or wired connection, but gradually extend to the use of radio. Although it brought a lot of convenience to people's lives, wireless LAN security problems also frequently occurred. This paper mainly aims to analyze the security risk and at the same time offer some preventive measures.
Application of Matrix and Algorithm Implementation in Rate Distortion Function
Authors: Shao Jun Hua , Liu Yu Hong
Published: September 2014

The paper applies the matrix calculation in rate distortion function and propose the algorithm implementation, which can decrease the calculation cost and increase the accuracy significantly.
Based on Improved Genetic Algorithm for Task Scheduling of Heterogeneous Multi-Core Processor
Authors: Qiu Yue , Zang Jing Feng
Published: September 2014

This paper puts forward an improved genetic scheduling algorithm in order to improve the execution efficiency of task scheduling of the heterogeneous multi-core processor system and give full play to its performance. The attribute values and the high value of tasks were introduced to structure the initial population, randomly selected a method with the 50% probability to sort for task of individuals of the population, thus to get high quality initial population and ensured the diversity of the population. The experimental results have shown that the performance of the improved algorithm was better than that of the traditional genetic algorithm and the HEFT algorithm. The execution time of tasks was reduced.
Design and Realization of Visual Simulation Control Based on Common Image Generation Interface
Authors: Zhou Xiu Zhi , Fu Zhan Ping , Wang Zhi Le
Published: September 2014

Common Image Generation Interface is the interface between two real-time communication subsystems. In order to exchange data between control end and rendering end of the scene simulation system, a packaging component based on common image generation interface is proposed in this paper, which is applied to visual simulation of helicopters and fighter. The simulation results show that this method can meet the real-time requirement of visual control system and is valuable in visual simulation of the weapon equipment operational field.
Multi-Objective Optimization Base on Incremental Pareto Fitness
Authors: Wei Xin
Published: September 2014

A new multi-objective optimization algorithm based on incrementally Pareto fitness is proposed in this paper. To overcome the directly calculate the Pareto fitness matrix expensively, we adopt to make full use of information of last iteration at each stept to update the Parteto fitness matrix gradually. Experiments proved the highest efficiency of the new method.
Multi-View Face Recognition Based on BP Neural Network and KPCA
Authors: Wang Xin , Pan He
Published: September 2014

This paper introduces the research background of computer face recognition technology, and puts forward a method of using kernel principal component analysis (KPCA) method and improved BP neural network methods for analysis and identification of multi view face images. The experimental results show that this algorithm is both effective and accurate. It achieved a higher recognition rate and excellent resistance to noise.
Pathfinding Algorithm of 3D Scene Based on Navigation Mesh
Authors: Zhang Yan Yan , Shen Yan Chun , Ma Li Ni
Published: September 2014

This paper takes the large-scale 3D scene as research background, and proposes an efficient pathfinding based on Navigation Mesh. For common 3D scene map, editable NavMesh data is generated for assisting to achieve efficient pathfinding. Compared with the classical A* algorithm, this paper makes an improvement in evaluation function, and develops heuristic search of A* algorithm, focuses on the path finding with assist of NavMesh data. Experimental results show that the proposed algorithm can reduce the search space, and improve the pathfinding algorithm running speed and memory overhead. The algorithm is more applicable to the common 3D scene and the NavMesh data is easy to edit.