bluuebunny/crossref_metadata_2025 huggingface dataset:
VLAN Technology Application Research Based on Campus Network Security
Authors: Fu Wei Hong , Lu Ai Xia
Published: November 2012

With the rapid development of network technology and the multimedia technology, campus network has become an important means of teaching, research, management and access to information. However, it is difficult to manage and maintain the campus network due to its large users, many access modes, multi-network applications and high sudden network behaviors. Based on the characteristics of campus network, this paper focuses on introducing the application of VLAN technology in the construction of the campus network security and making an analysis on the scope and prospect of the technology.
The Strong Prime Numbers Generation Algorithm Based on Genetic Algorithm
Authors: Hu Zhi Hua , Zhang Qing
Published: November 2012

Large prime number generation methods in need of a more complex modular exponentiation, leading to defects of slower computing speed, Based on this genetic algorithm, proposed a new strong prime number generated algorithm. The method according to the characteristics of Strong Primes, the algorithm is simple, easy to implement to meet the needs of the RSA algorithm security , giving the method of determining the large prime numbers. Design fitness function , crossover and mutation strategies which can be used in genetic algorithm. Finally design the algorithm of producing Strong prime numbers
New Spectral Indices as Indicators of Carotenoids Content
Authors: Xiong Yiong , Yue Yue Ming
Published: November 2012

Carotenoids play a key role in adaptation of plants to light stress and other unfavorable ecological conditions. Remote sensing of carotenoids content still not well developed due to the absorptions overlap of chlorophyll a and carotenoids in the visible spectral range. In this study, for accurate estimation of carotenoids contents, an assumption of absorption in [450, 550nm] is proposed. That is, the spectral reflectance features in this range are comprehensive effects of chlorophyll (chl) and carotenoids (car) absorption. And the effects of chlorophyll and carotenoids were multiplicative in [450, 550nm] and a new spectral index was defined. The results showed that the new spectral index was strongly related to carotenoids and could be applied as the indicator of carotenoids content.
Bargaining Based Supply Chain Scheduling
Authors: Chang Tian Tian , Wang Li Li , Zhang Ji Hui , Ma Qing Yue
Published: November 2012

Coordination across the supply chain improves the manufacturing efficiency a lot. To provide a rational cooperation mechanism for supply chain scheduling, a bargaining model was established on the basis of the Nash bargaining theory. The solution of the model draws forth a new scheduling problem with multi-objective product. A polynomial heuristic was designed to find the near-optimal bargaining solution under the assembly circumstance.
Phylogenetic Analysis of Genes Related Nitrogen Fixation in Lotus japonicus
Authors: Huang Shi Dong , Ji Hong Fang , Nie Xuan , Cheng Ting Ting , Yang Yan Mei
Published: November 2012

Lotus Japonicus is the model organism in legumes which are very important plants playing a central role in biological research. Research on symbiotic nitrogen fixation in legumes has significant economic and scientific value. We utilized evolutionary analysis method explore symbiotic nitrogen fixation; statistical analysis the impacts on symbiotic nitrogen fixation genes in evolution. Application of comparative genomics methods to deepen the understanding of the genes related symbiotic nitrogen fixation.
Capacitated Supply Chain Operation Optimization of Assembly Manufacturing with Delivery Time Constraint
Authors: Li Shuang Yan , Zhang De Zhi , Jin Fang Ping
Published: November 2012

Operation optimization problem of capacitated assembly manufacturing supply chain was investigated in this paper. Three-stage system open equations of all planning periods were set up. Acceptable delivery time for customers form time window that was also considered as constraint on assembly system supply chain. The planning time is divided into many equally intervals, and operation decisions of every period can vary with time. Ability constraint in the process of supply chain operation, delivery time constraints and different production components’ quantity ratio constrain were all considered in the dynamic operation optimization model. Optimization problem is solved by hybrid mixed integral optimization and SQP algorithm. And a set of numerical examples that reveal the insights into the dynamic optimization policy.
Construction of Analog Electronics Course Design a Study of Quality Control System
Authors: Yu Jing Zhu , Liu Qiang , Fu Guo Hua , Mao Chun Yu
Published: November 2012

Curriculum design is the key to teaching practice in analog electronics design, the curriculum design of analog electronics technology is a follow-up course who after completing the analog electronics. Through the steps of the design, welding, commissioning, and eventually completed the course requirements of the physical works. The design of analog electronic courses can let students understand the design process of an electronic works which for the tops of design, drawing, welding, assembling, testing, etc. Greatly improve the students’ practical ability. On the other hand, by the application of theoretical knowledge, students can also greatly improve the theory and solve practical problems. The ability to learn lots of knowledge can not be learned from textbooks. But at the same time, in curriculum design, will also facing unexpected contradictions, these contradictions show the contradiction between the analog electronics course design and quality control. Therefore, in order to solve the problems in the design of analog electronics courses, improve the quality of students who have completed their work. The curriculum design of analog electronics technology must have a strong quality control system compatible with the curriculum design.
The Geometric Errors Identification of New Methods in Four-Axis Machining Center Axis
Authors: Yang Shuan Qiang , Lin Shu Wen
Published: November 2012

A method for fast measuring and identify the six geometric errors of each rotary axes in Four- axis machining center was invented. The method adopted the ball-bar to measure the X, Y, Z direction deviations of the centre block installed on the rotary table in the different rotation angle. And deduced the geometric error identification model in rotary axes based homogeneous transformation, and then identify the axis of the six basic geometric errors. in order to reduce the influence of the inaccuracy of the ball-bar and the reference point position, this paper put forward new method based on the analysis of the sensitivity matrix method, used to guide rational distribution points, so as to improve the error identification accuracy.
Study of Lean Production’s Impact on Improving Manufacturing Enterprise’s Core Competitiveness
Authors: Zhang Hong Liang , Niu Zhan Wen
Published: November 2012

The manufacturing enterprises in China began to learn and apply lean production at early 1980s, but till now the application scale and level is still far behind Japan and America, so it is necessary to research the relation of lean implementation with enterprises in China. This paper applies grey superior analysis to study lean production’s impact on manufacturing enterprises’ core competitiveness using practical data of China. Through analysis, key factors of lean production to competitiveness improvement and main aspects of core competitiveness affected greatly by lean production are recognized. Finally, based on analysis result, some advice on implementing lean production successfully is given to manufacturing enterprises of China.
The Construction of the Management System of CNC Milling Parameters
Authors: Cai An Jiang , Guo Yan Jun , Guo Shi Hong , Ding Ming Wei
Published: November 2012

CNC Milling Process for the complex characteristics, in order to solve how to quickly and effectively to provide a reasonable and optimal machining parameters of CNC milling process for technologist. The paper takes horizontal machining center DMC60H as a test platform and technological data of shell aluminum alloy hydraulic aircraft engine parts as a study. the paper establish management system of CNC milling parameters which was suitable for machinery manufacturing enterprises. The results showed that: The established parameters of CNC milling system can be better management of various CNC milling technology to effectively manage information and improve the CNC milling process information efficiency, has certain promotion effect to the production of the numerical control milling processing and the development of the manufacturing enterprises.
Technology for Eliminating early Failure of NC Machine Tools
Authors: Zhang Gen Bao , Liu Jian , Fan Xiu Jun
Published: November 2012

To eliminate the early failures and improve the reliability of numerical control (NC) machine tools, the comprehensive technology for these works is proposed in this paper. Firstly, model is established to describe the early failures of NC machine tools, then the formation of early failures and mechanism of early failures elimination are studied. Secondly, a comprehensive technical framework for eliminating early failures is introduced, with some detailed process and implementation. Finally, example of NC rotary table is shown to illustrate the applicability and validity of the technology for eliminating early failures of NC machine tools.
The Dynamic Design of Mechanical Structures of CNC Milling Machine Based on Virtual Prototyping
Authors: Wang Yi Xuan , Li Duan , Wang Ying , Guo Yan Li , Chen Xu
Published: November 2012

In order to optimize the CNC milling machine structure, the system modeling, simulation, and virtual prototyping technology are used in this paper. It has built 3D virtual prototype model and finite element model of the upright post on Pro/E, ADAMS and ANSYS platforms respectively. The modal analysis of different rib column has been done. The top twenty frequencies and mode of those upright posts are calculated by ANSYS software. Through the modal analysis and compared with different column structure, the optimization column geometry is determined, and the main spindle speed should not be greater than 9000 r/min. These will provide important references for the general design and manufacture of the CNC milling machine.
Construction of Virtual CNC Machining System Based on 3DS and Open GL
Authors: Ni Jun Fang , Fan Wei , Duan Ye Kuan
Published: November 2012

Virtual CNC machining is test cutting and process optimization of virtual reality before production, which overcomes defects of interferences and collisions while the real workpiece is fabricated. The 3D scenario of Virtual CNC machining system is constructed by 3DS and Open GL on VC++6.0 platform. This system mainly encompasses modules of machine modeling, simulation of virtual cutting and its control panel. Key technologies solve 3DS file reading, simulation control by Open GL back buffer and implementation of control items on control panels respectively, so practicability of CNC system is improved greatly.
Curve CAM Research in Multi Axis NC Machining Technology
Authors: Liu Hong Jun , Zhi Shu Ya
Published: November 2012

Using curve CAM space meshing work principle established its physical model. The mathematics model of the CAM work surface is deduced through mathematical analysis. Discussed the processing method and principle is based on the meshing forming and freedom forming machining methods, studied the curve CAM NC-processing technology using general four axis and five axis machine tools. This process has been successfully used for axis CNC milling to machining CAM surface. For continuous dividing space curve CAM CAD/CAPP / CAM system research is laying a foundation.
Measurement and Control of the Gas Turbine Inlet Air Cooling System
Authors: Wang Jian , Shu Jiang Zhou , Huang Guo Hui , Jiang Ai Peng
Published: November 2012

As a constant-column power generating machine, the combustion turbine has a direct proportion of its output to the quantity of input air. Therefore, when the ambient air temperature rises higher in summer, the effect of combustion turbine is decreasing. In order to enhance the efficiency of combustion turbine in summer, two sets of inlet air cooling system (IACS) were installed in PG6551(B) combustion turbines in Jinhua, Zhejiang, China. Two low-pressure evaporators were installed in the caudal flue of the waste heat boiler, therefore, the produced saturation steam drives a single-effect lithium bromide absorption chiller to cool the input air of combustion turbines to raise the output power of combustion turbine in summer; or supplies the low-pressure heater to heat the condensated water from the deaerator of the steam turbine in winter. A measurement and control system (MCS) of the new-added inlet air cooling equipments was developed. Based on the framework of DCS (Distributed Computer System), the M&C system has the IACS work correctly and easily. The structure and functions of the M&C is described in detail.
Research on the Hybrid Supply Chain of Lean Production and Agile Manufacturing
Authors: Wang Li Li , Chen Chong , Zhang Zheng Mao
Published: November 2012

Based on the analysis of the characteristics and relationships between the production paradigm of Lean Production and Agile Manufacturing，through considering the similarities and differences between the two production patterns, their synthesizing application in the Integrated Supply Chain Management System is studied. A case study is presented to demonstrate how leanness and agility have been combined successfully within one supply chain.
Factors Influencing Rope Force of Recoil Starter
Authors: Chen Yu Wei , Liu Sheng Ji , Wang Jian
Published: November 2012

Rope force of recoil starter is an important design parameter for starting safety. This paper analyzes the starting resistance torque of an internal combustion engine, and then proposes the appropriate calculation methods of friction resistance moment, compression resistance moment and inertia resistance moment. Taking several types of internal combustion engines for example, this paper analyzes the main factors influencing rope force, and then draws the conclusion that displacement and ambient temperature are the key to the rope force. The work provides the basis for the design and inspection of recoil starter.
Microcontroller-Based Design within the Cone Flowmeter
Authors: Qin Zhen , Zhang Wei , Zhao Jing Bo
Published: November 2012

The flow throttling device for the V-shaped cone-type cutting device, the throttling device to break the traditional flow through the throttling device will shrink to the concept of the pipeline near the central axis, the use of coaxial pipe installed in the V-shaped tip cone contraction of the fluid gradually cutting edge to the inner pipe wall, by measuring the V-shaped inner cone to measure the differential pressure before and after the flow of design ideas. This V-cone flowmeter in a shorter straight pipe conditions, to a wider range than on the clean or dirty fluids to achieve a more accurate and more effective flow measurement. This will be based on single-chip cone flowmeter air mixing systems used in ship gas flow measurements, experimental results show that the SCM-based cone flowmeter has a small size, light weight, high accuracy, easy to use security features .
Design of a Novel HPHT Lubricity Tester and its Preliminary Application
Authors: Xu Lin , Xu Ming Biao , Zhao Lin
Published: November 2012

Manifestation of friction between the drill string and the borehole is of special importance for modern drilling. A novel lubricity tester, in combination with high pressure high temperature(HPHT) actuators, has been designed to permit the evaluation and testing of various types and the lubricity of drilling fluids by simulating the rotational speed of the drill pipe and pressure exerted against the borehole. This instrument mainly consists of four parts, i.e., a friction mechanism, HPHT actuators, the computational control system, and a load apparatus. The key test cell has been introduced. The lubricity of the typical drilling-in system(PRD) has been evaluated using this instrument. The results showed that except for the filtration, the designed lubricity tester can effectively describe the friction behaviors in the whole dynamic drilling, by rotating the rod in the given environment.
Motion Simulation of Mountain High Altitude Work Vehicle Based on UG/Motion
Authors: Wu Hao , Wu Xue Wei , Wang Hong Jun , Zhang Hong Fu
Published: November 2012

This paper introduces the function and basic process of UG movement simulation module UG/Motion, establishment the virtual model and simulation model of Mountain High Altitude Work Vehicle and motion simulation on it, simulation the practice movement of Mountain High Altitude Work Vehicle and obtains motion law and the parameters, and output simulation results through animation and chart. Practice shows that use UG / Motion for motion simulation is an effective aid for mechanical design, and improve work efficiency and perfect the design.
Design of High Frequency Fatigue Testing Machine Driven by Piezoelectric Vibrator
Authors: Jie Meng , Xie Hai Feng , Liu Yan , Yang Zhi Gang
Published: November 2012

In order to measure the fatigue property of the small and hard brittle components working under conditions of the little amplitude, high frequency force, a novel kind of resonant high frequency fatigue testing machine which is driven by the piezoelectric vibrator (PZT、PLZT or PMN) has been proposed. Firstly, the working principle of the piezoelectric resonance high frequency fatigue testing machine is analyzed, and the dynamic model of the fatigue testing machine is established to get the systemic dynamic characteristics. Then a prototype is designed and produced. Finally, the maximum load on the sample is measured by the test with the machine. The results indicate that the maximum load on the sample is 23.4N-98.1N when changing the voltage (100V-250V) and the thickness of the plate spring (1.1mm-0.6mm). The prototype made in this paper is suitable for the tensile and fatigue testing with the load level mentioned above under the condition of little amplitude and high frequency force.
Experimental Study on Electronic-Controlled High Pressure Common Rail Diesel Engine Fueled with Biodiesel
Authors: Dai Xi Liang , Chen An Yu , Lu Ke Jiu
Published: November 2012

The performance tests of an electronically controlled high pressure common rail diesel engine and of the car mounted with an engine of this type fuelled by biodiesel–diesel mixed fuel with different mixing ratios are conducted, and its power outputs, fuel economies and emissions are measured and compared with the one of diesel operation. The results indicate that: when the load is 2200 r/min, the effective specific energy consumption decreases, NOx emission increases; smoke emission decreases at high load and keeps almost no change at low and middle loads; HC emission decreases at low and middle loads and keeps the same at high loads, and CO emission maintains the same; at full load characteristics, the power output increases slightly, HC and smoke emissions decrease, CO and NOx emissions increase.
Experimental Study on Diesel Engine Fueled with Different Proportions of Diesel – Methanol Blend
Authors: Lu Ke Jiu
Published: November 2012

Cosolvent is used and a fuel blend of diesel oil and methanol is made to help solve the problem of intermiscibility of the two. Comparative experiment is made on the power performance and emission characteristics of a 4102QB DI diesel engine with diesel and different proportion of fuel blend of 10%, 20% and 30% methanol respectively. Test results indicate that, providing there is no change to the diesel engine parameter and basic structure, the increased percent of methanol will cause drops of power performance and significant reduction of smoke emission density and CO, but amount of emission density of HC and NOxis slightly increased. However, the emission density does not change too much.
Experimental Study on Characteristics of False Defrosting for Split Air Source Heat Pump
Authors: Tang Rui Chao , Han Zhi Tao , Zhang Er Kang , Liu Shu Guang , Zhang Hai Quan , Su Yu Chang , Wang Song Qing
Published: November 2012

Detailed experimental study on the characteristics of false defrosting of a split type air-source heat pump (ASHP) has been made. The results show that the false defrosting is seriously detrimental to ASHP by comparing varied parameters of compressor such as shaft power, suction and discharge pressure, etc. in normal defrosting and false defrosting. This paper also analyzes a common defrosting control method for air conditioner of split ASHP room, i.e., with two temperature sensors set on indoor heat exchanger, the operating principle thereof and drawbacks in terms of causing false defrosting.
Study on Vehicle Stability Based on Coordinated Control of Direct Yaw Moment Control and Slip Rate Control
Authors: Li Jun Wei , Zhang Guo Guang , Wang Yu Hai
Published: November 2012

A coordinated control strategy based on Direct Yaw Moment Control (DYC) and slip rate control was proposed aiming at improving vehicle stability. The system was divided into two layers: an upper layer and a lower layer. DYC was the upper-layer control, which calculates the additional yaw moment exerted on the vehicle based on the working condition of the vehicle. A simplified arithmetic of transferring additional yaw moment to desired slip rate was adopted in order to achieve differential braking. Slip rate controller was the lower-layer control that exerts braking force on the braking wheels to achieve the desired slip rate and to achieve desired yaw moment.
Application Study of Load Forecasting of Central Air-Conditioning System Based on Time Sequence Analysis Method
Authors: Zhu Xue Li , Dong Bo , Zhu Yong Jun
Published: November 2012

With the characteristics of non-stationarity, non-linearity, time-lag of refrigeration/ heating supplying in minds, load forecasting of central air-conditioning system is carried using time sequence analysis method. Firstly, acquisition sample data of central air-conditioning system is pretreated, and random time sequence AR model of system is formulated. Then, forecasting of AR refrigeration/heating load based on Yule-walker method is conducted. In order to enhance forecasting accuracy, crossover forecasting is introduced into the load forecasting, that is, to use vertical forecasting to follow household demands for load and horizontal forecasting to track changes of weather. Then, weight cross is made to vertical and horizontal forecasting results. Finally, refrigeration/heating load forecasting software of central air-conditioning system is developed, which is used in energy-saving monitoring and control of central air-conditioning system.
Improvement of DPC of Grid-Connected Inverter for Wind Power System
Authors: Liu Xian Xing , Wang Rui
Published: November 2012

This paper analyzes the principle and properties of the traditional direct power control (DPC) system for the three-phase grid-connected voltage source inverter based on its mathematical model. Hysteresis comparators in power loop of DPC control system, leading to the switching frequency not fixed .the fluctuation of power and DC voltage in temporary state. This paper brought an improved program. The active and reactive powers are calculate by estimating the virtual flux. The AC side voltage sensors could be replaced. The SVPWM has been utilized instead of the power hysteresis and switching table of the traditional DPC system.
An Analysis of Mechanical Seal Failure of HTM Pump and its Improvement
Authors: Zhou Min , Wen Hua Bin , Wang Wen Hui , Hu Yong , Shi Yan , Li Liang
Published: November 2012

Regarding the issue of short service life of mechanical seal of HITM pump in polyester production, this paper analyzes its causes, carries out the modeling, theoretical analysis, and discussion concerning the temperature flow field of seal faces, and puts forward the measure for improving the mechanical seal unit.
Experimental Study of Flow Rate and its Ripple of a Cosine Gear Pump
Authors: Hu Hua Rong , Wang Jian
Published: November 2012

According to the standard,The testing platform of the cosine gear pump is designed and the theory proves to be correct through experiment. Namely the cosine gear pump has an advantage of big flow rate and small flow ripple in comparison with involute gear pump under the same parameters. The results may provide a basis for the cosine gear pump in the design and application.
Modeling of Switched Reluctance Motor Based on Dynamic Fuzzy Neural Network
Authors: Xu Ai De , Zhang Shan Shan , Sun Di
Published: November 2012

This paper proposed a novel mathematic model for switched reluctance motor(SRM):dynamic fuzzy neural network(D-FNN) was used to model for SRM based on the inductance characteristics, namely experimentally measured sample data. Compared with other modeling method, the inductance based on D-FNN can be trained on line and has the advantages of compact system structure and strong generalization ability. The SRM system is simulated with the trained inductance model. Compared with the actual system, the current waves are similar. This proves the new modeling method is correct and feasible.
A Novel Tri-Direction Energy Harvester Using Bimorph Cantilever Structure
Authors: Fan Kang Qi , Wang Bo , Huo Hai Dong
Published: November 2012

Energy harvesting for powering low-power devices has drawn considerable attention over the last decade. This paper reports a novel tri-direction energy harvester to scavenge energy from wind and vibration, or a combination of them. The proposed harvester consists of a triple-level bimorph cantilever with a mass block to harness energy from ambient vibration. The mass block also acts as an aerofoil and bluff body to scavenge energy from wind. Theoretical analysis shows that the maximum output power of the harvester is 2.77 W, and the resonance frequency is 79 Hz.
Induced Flow Simulation by Means of Low-Temperature Plasma via a Multi-Components Boltzmann Method
Authors: Wan Gang , Li Hai Yuan , Yang Chun Xia , Li Bao Ming
Published: November 2012

A multi-components lattice Boltzmann method for weakly ionized plasma is employed in our simulation. A term to describe the plasma ionization, recombination and charge attachment has been added in the equations. An induced flow by surface dielectric barrier discharge plasma actuator is simulated. The distributions of electrons, positive ions, and negative ions near the solid wall were obtained. It was found that the charge mainly distribute on the on the dielectric surface upper the embedded electrode. The flow field and velocity profile near the surface was obtained. It was found the plasma actuators can significantly increase the velocity of an induced flow at the boundary layer.
Analysis and Improvement for Structure of the Front Frame of XG958 Wheel Loader
Authors: Li Yan Bin , Zhang Chao , Liu Chun , Liu Huan
Published: November 2012

The geometric model of the loader frame is directly established by the Pro/E software and imported to ANSYS to create finite element model. By the overall analysis of the front frame in the typical operation conditions, the whole distributions of stress of the front frame of XG958 wheel loader were obtained. Then, base on the distribution of the stress, the local structure of XG958 wheel loader frame was improved and the result was validated.
Fault Diagnosis for Large-Scale Wind Turbines
Authors: Sun Zi Qiang , Chen Chang Zheng , Liang Shu Min
Published: November 2012

The method of spectrum analysis is present to detect fault signals of main shaft and increasing gearbox of large-scale wind turbines, so as to prevent from huge loss and serious accidents. The real-time signals detected from wind turbines will be compared with those stored in the database to find whether the amplitude of the signals exceed the alarm threshold. Frequency spectrum is obtained based on both wavelet transform and frequency spectrum analysis of collected signals through the graphic programming language–LabVIEW. The method can judge accurate fault type and its position on wind turbines, which present evidence for fault diagnosis of the gearbox and main shaft. Experimental results indicate that the method is effective.
Experimental Study on Fuel Injection Intelligent Control Technology for Hybrid Fuel Engine
Authors: Wang Shu Xin , Chen Ming Hui , Huang Xin Hua , Gu Yun
Published: November 2012

On the base of converting the X6170ZC diesel engine into a diesel-LNG Hybrid Diesel Engines, intelligent control technology was used to improve the precision of fuel injection. Through the experimental analysis of the replacement rate changes, the test results show that the engine comprehensive replacement rate is higher and more economic.
The Scheduling Frame Research Facing Rapid Response Manufacturing
Authors: Lu Zhi Bing , Wang Ai Min , Tang Cheng Tong , Li Jing Sheng
Published: November 2012

The current environment is experiencing a transformation from multi varieties and little batch to multi varieties and batch, this situation has result that companies’ management do not suite it. According to this the scheduling frame research facing rapid response manufacturing has been proposed. At first through this analyzing the problem in current situation, the whole scheduling frame is researched. Secondly, many models that can be used in this frame have been discussed such as manufacturing information, disturbance events, automatic scheduling and dynamic scheduling models. Finally the whole scheduling platforms which can be used in practical situation has been proposed and make a technical function base for current manufacturers.
Research on the Purifying Performance of Filters to Inhalable Particles
Authors: Zhang Wei , Zhang Yu Bin
Published: November 2012

To determine the purifying performance of filters to inhalable particles,an experimenal device to test purifying performance of the filters were developed based on GB12218-89 and EN779:2002. With the device,6 filters were taken as research objectives with a view to investigating the purifying performance to particles in ambient air,the influencing factors such as raw materials and structures on filters’ purifying performance were pointed out. The result shows that woven, knitted and general non-woven filters are not suitable for filtering the particles in the ambient air.With higher dust capacity ,higher filtration efficiency and lower resistance,PP acupuncture electret filters are suitable for purifying the inhalable particles in the ambient air.
Base on Fuzzy Control of Grid Power Control of VRB Energy Storage System of Wind Farm
Authors: Bai Shan , Yi En Yong , Yao Xing Jia , Liu Ying Ming
Published: November 2012

With the development of wind power technology in recent years, wind power technology has made rapid development. In this paper, the wind farm is the main object of study, the energy storage elements is vanadium redox flow battery (VRB), the use of decoupling control of fuzzy PID control algorithm for real-time changes in PID parameters of the active and reactive power. The outer loop of motor side rectifier is power loop, the inner is current loop. The outer loop of grid side inverter is the voltage loop, the inner is current loop, and based on vector control, the rectifier and inverter achieve decoupling process.The traditional PID is poor in anti-interference ability and robustness,so this paper uses the fuzzy PID control algorithm. The MATLAB/simulation results show that the fuzzy control algorithm can achieve power tracking control,and has strong robustness.
Design of Temperature Control System Based on LabVIEW
Authors: Wang Chun Jie , Wang Tie Zheng
Published: November 2012

In order to achieve stable control of temperature in the process control, a system based on LabVIEW platform has been designed which can switch between fuzzy controller and PID controller, with the advantages and disadvantages of PID and fuzzy algorithm taken into account. In this paper, the PID parameter self-setting principle which is based on ASTROM limit cycle of law is also employed. The experiment results show that, the proposed method which combines fuzzy algorithm and PID control method, implemented by flexible online programming based on LabVIEW, can achieve high precision and strong robustness in the industrial applications.
Numerical Simulation of the Nitrogen-Enriched Air Combustion and Emission in Diesel Engine
Authors: Jin Ying Ai , Huang Feng Qin , Gao Qing
Published: November 2012

Combustion intermediate products in nitrogen-enriched intake air (NEA), such as CH2O and H2O2, are researched in this paper with chemical reaction kinetics software. Besides that, combustion of n-Heptane in NEA at different intake temperature and different rotate speed are researched. Nitrogen-enriched air combustion process in diesel engine is simulated with CAE software. The temperature trace peak and NOx emission at NEA and different rotate speed are studied in this paper. The increment of nitrogen in the intake air greatly impacts on the n-Heptane combustion intermediate products CH2O and H2O2; and the results show that the nitrogen is of fire-retardant properties. The peak-cylinder combustion pressure and the relative pressure-increase rate will decrease with the increment of nitrogen in intake air when the temperature is higher than certain value. NOx emissions decrease with the increment of nitrogen in intake air.
Wheeled Off-Road Excavator with 2-Dof Articulated Body
Authors: Wang Tong Jian , Xi Bo Bo , Chen Wei , Lv Chuan Xiang
Published: November 2012

Proposed wheeled off-road excavator with 2-Dof articulated body, and analyzed the working principle of the 2-Dof articulated body, machine-hydraulic drive system and the key technologies .Through the study of the vehicle drive system matching calculation and the ADAMS simulation of articulated body, the results show that the articulated truck has good passing ability, stability and adaptability on a complex road.
Single Neuron PID Adaptive Control for BLDCM Based on Algebraic Algorithm
Authors: Diao Yan , Jia Hong Ping , Geng Tian Jun
Published: November 2012

The brushless DC motor control system often adopts the classic PID control, the advantages of which are as follows: simple to control, easy to adjust the parameter and a certain degree of control precision. But it relies on accurate mathematical model. The permanent magnet brushless DC motor control system is a multi-variable and nonlinear. As to the deficiencies of the classic PID control method, this thesis proposes a method called artificial neural network PID adaptive control method, which is based on algebraic algorithm and overcomes the shortcomings such as the slow convergence of BP algorithm, easy to trap in local minimum, and etc.
Numerical Computation of Temperature in APU Compartment of Passenger Plane
Authors: Xu Rang Shu , Zhang Nana , Niu Ling , Yang Meng
Published: November 2012

In order to study heat transfer process in APU compartment of passenger plane and to perform structure thermal analysis, temperature field of APU compartment has been calculated by numerical computation. The computation model of flow and heat transfer process in APU compartment are setup by commercial CFD software Fluent, Realizable k-ε turbulent model and S2S thermal radiation model are used, and the flow field, temperature and heat flow information are acquired. Radiation heat transfer is the major heat transfer process in APU compartment; APU fireproofing cover and heat insulation hood of exhaust pipe function work as radiation heat shielding screens; and cooling air in the APU fireproofing cover plays an important part in decreasing the temperature of the fireproofing cover; the injection cooling air in the exhaust pipe reduced the wall temperature effectively. The results provide reference to optimization design.
Design of an Electric Control System for Plastic Pipe Automatic Conveyor Line
Authors: Jiang Rui , Huang Hui , Zhang Ying
Published: November 2012

In order to improve the degree of automation in plastic pipe production and save labor cost, this paper proposes a design scheme about the electric control system design of straight pipe automatic conveyor line. The Programmable Logic Controller (PLC) is the core control component in this system. This system can control the start and stop of production lines by applying communication between computer and PLC, change the number of each bundle of pipes, and monitor online the operation conditions of automatic transmission lines. Finally, actual operation of the system shows that it runs steadily, operates simply, and is highly automatic with low labor cost.
Simulation Research on Fuzzy Adaptive PID Control of Variable Pump Control System
Authors: Wang Hui , Xu Zhuo
Published: November 2012

According to the problem of large overshoot in the variable pump constant pressure output, the fuzzy controller and PID controller were combined. The dynamic response of system output pressure was obtained by combining simulation with a fuzzy adaptive PID controller designed in Matlab/Simulink and mechanical hydraulic model established in AMESim. The simulation results show that fuzzy PID control can achieve the goal of system response without overshoot, and response speed is improved further. The anti-interference ability is also stronger.
Theoretical Design Research for Stirring Device of Fracturing Blender Truck
Authors: Huang Tian Cheng , Wang De Guo , Zhou Si Zhu , Yuan Xin Mei
Published: November 2012

In order to design reasonable-structure and high-efficiency stirring device, realizing development of high sand ratio, high precision and large discharge, according to blender truck actual working conditions and mixing fluid material characteristics, this paper chooses reasonable agitator paddle structure, paddle combination type and mixing tank structure, concludes calculation methods of stirring power, paddle strength and stirring axis design, providing the theoretical support to blender truck stirring device design calculation.
Methods of Planning, Running and Optimization of Material Flow in the Laboratory of Flexible Manufacturing Systems with Robotized Manipulation Supported by No Drawing Production
Authors: Sebenova Silvia , Krajcova Katarina , Pechacek Frantisek
Published: November 2012

This paper is focused on the methods, which are used for planning, running and optimization of material flow. These methods are very important element of each production and company. There are several methods which are used, for example JIT (Just in Time), Kanban, TOC (Theorie of Constraints), etc. A selection of appropriate method affects largely production costs, efficiency and produced quantity. For the laboratory of flexible manufacturing systems with robotized manipulation supported by no drawing production were compared several methods and on the based their advantages, disadvantages and suitability of use was selected the most appropriate method of planning, running and optimization of material flow.
Application of PID Neural Network Controller on Engine Throttle System
Authors: Cheng Huan Xin , Li Peng
Published: November 2012

A mathematical model of engine throttle as the controlled object is established and then the neural network algorithms and PID control are combined. With the self -learning function of the neural network, self -tunings of PID parameters are realized. The method overcomes disadvantages of PID as parameters which are difficult to determine and embodies better intelligence and robustness of the neural network, the simulation is researched by Matlab and the results show that the PID neural network controller is more accurate and adaptive than conventional PID.
Fuzzy Logic Control Strategy for an Extended-Range Electric Vehicle
Authors: Niu Ji Gao , Zhou Su
Published: November 2012

This paper presents a Fuzzy Logic Control Strategy (FLCS) for an Extended-range Electric Vehicle (E-REV) with series structure. The control strategy design objective of the E-REV is fuel economy. Based on the State of Charge (SOC) of the battery and the desired power for driving, the power required by the vehicle is split between the engine/generator set and the battery by the FLCS. The engine can be operated consistently in a very high efficiency area and the SOC of the battery can be maintained at a reasonable level. Some standard driving cycles and two control strategies of Power Follower Control Strategy (PFCS) and FLCS were simulated with AVL-Cruise and Matlab/Simulink to analyze the vehicle performance. Some simulation results are compared and discussed: the FLCS indicates better performance in terms of fuel consumption.
Modeling and Improved Switching Control of Hypersonic Vehicle with Uncertainties
Authors: Wu Zhen Dong , Wang Qing , Dong Chao Yang , Bai Bin
Published: November 2012

In order to achieve an effective control approach for hypersonic vehicle over a wide flight envelope with uncertainties of structural dynamics and system parameters, a unified modeling and improved switching controller design approach is proposed, and the Adams Customized Development Platform of Flight (ACDPF) has been developed to implement it. The paper firstly discusses the main issues related to the model of the ACDPF, which can be set parameters by several blocks. And it also supports the reuse of modeling among similar missions, thus cutting down the design effort for new model. Then, the improved switching control with baseline controllers and robust adaptive controllers are selected in order to adjust control law to compensate for uncertainty. Finally, the effectiveness of the proposed approach is demonstrated by illustrative case studies and simulation results show that the approach provides a well tracking performance.
High-Power AC Servo System Identification Research Based on Wavelet Neural Network
Authors: Hou Run Min , Liu Rong Zhong , Hou Yuan Long , Gao Qiang
Published: November 2012

As a result of the non-linear characteristics and the uncertain disturbances in high-power AC servo system, it is difficult to construct an accurate mathematical model. In order to solve this problem, this article proposes a system identification method based on wavelet neural network. It makes full use of the advantages of the wavelet which combines neural network good time-frequency localization property and volatility of wavelet function and the nonlinear mapping capacity, self-learning and adaptive capacity of neural networks to solve the problem of non-unique RBF neural network approximation function expression. The simulation results show that the convergence rate, robustness and approximation accuracy of this method are better than the traditional neural network.
Design of Hydraulic System for Soft Roll Calender
Authors: Yang Jun Kai , Xu Yun Jie
Published: November 2012

It introduces the working principles of the hydraulic system for soft roll calender, and designs the hydraulic system based on its technological requirements. Through the reasonable configuration of logic valve, solenoid proportional pressure reducing and relieving valve and so on, this hydraulic system can improve the working efficiency of the entire system, further improve smoothness of paper sheets, and improve the quality of paper.
Diagnosis of High Oil Temperature of the Bearings Based on Oil Analytical Techniques
Authors: Zhang Yong Guo , Jiang Xu Feng , Wu Xiao Wen , Ying Zong
Published: November 2012

To determine the cause of high oil temperature of the bearings in a kiln, oil samples extracted from the recovery of lubricant oil and were tested by comprehensive oil analytical techniques (including conventional physical and chemical Analysis, pollution degree detection and ferrography wear particle analysis). Results show that root cause of high oil temperature is improper selection of lubricating oil and serious solid particles pollution of using lubricating oil. Therefore, the application of oil analytical techniques to monitor the oil working condition, to prevent mechanical failure and to extend machine life is very effective.
Simulation of Two Kinds of Topdrive Stem Based on Solidworks
Authors: Zhang Fei Yu , Wang Qing Yan
Published: November 2012

This paper established three-dimensional model of two kinds of topdrive stem by solidworks, compared their structure, brought out analysis of strength and fatigue, compared their merits and defects.
Analysis of the Car Body Sound-Structure Interaction and the Contribution of Plate Based on LMS Virtual Lab
Authors: Sun Lian Wei
Published: November 2012

Based on a passenger car model for the analysis of objects, this paper analyses the acoustic sensitivity of this car body model by the application of the Acoustic model of LMS Virtual Lab software and in turn analyses the contribution of plate, the analysis process uses the installation position of the left front shock absorber for the vibration source , acquire the distributed cloud chart and the acoustic transfer function of driver both ears , according to the cloud chart distribution condition of the internal sound field in certain frequency can be seen ,according to the transfer function curve the frequency relative to the sensitivity peak value can be seen, the plate witch contribution is maximum can be found by analyzing the contribution of plate, these provide the guidance for the following structures design.
The Analysis of a Simplified 2R Pseudo-Rigid-Body Model with Moment Load
Authors: Zhang Yun Jiao , Wei Guo Wu , Dai Jian Sheng
Published: November 2012

Pseudo-rigid-body model (PRBM) method, which simplifies the geometrical nonlinear analysis, has become an important tool for the analysis and synthesis of compliant mechanisms. In this paper, a simplified 2R PRBM with two rigid links and two torsion springs is proposed. The characteristic radius factor and stiffness coefficients are selected as the design variables; in order to be better to simulate the tip point and tip slope, a three-dimensional objective function is formulated to optimize the new pseudo-rigid-body model. It is revealed in this paper that the precision of the tip point simulation can be improved when the coefficient of the tip slope error in the objective function is reduced.
A Study on Design Archetypes Based on “Without Thought Design”
Authors: Hu Xiao Tao
Published: November 2012

By analyzing the meaning of “Without Thought Design”, the author tries to sum up the definition of design archetype. Design archetype can help designers accumulate rich experience in product design, and Designers can accumulate more design archetypes through three ways: classic groceries, unconscious actions and potential demand.
The Use of TiAlN Coated Carbide Tool when Finish Machining Stainless Steel
Authors: Jurko Jozef , Panda Anton , Behún Marcel
Published: November 2012

This article presents conclusions of use TiAlN at drilling of a new austenitic stainless steels. This article presents the results of experiments that concerned the verification of the cutting tool wear. The results of cutting zone evaluation under cutting conditions (cutting speed vc=60 m/min, depth of cut ap= 3.0 mm and feed f= 0.04 mm per rev.) .
Study on Key Technologies of the Green Furniture Design
Authors: Huang Kai , Zhang Zhong Feng , Tao Zhen Ping , Liu Huan
Published: November 2012

The furniture manufacturing industry brings human rich material civilization, but also leads to the ecological crisis at the cost of the resource exhaustion and environmental degradation. By introducing the necessity and urgency of studying on the key technologies of green furniture design, it analyzed the rich contents of green furniture design. And then it discussed the key technologies of green furniture design in detail from the four aspects of choosing furniture materials, structural design, process design, and design for recycling. Finally, it pointed out that the breakthroughs in key tech-nologies of green furniture design have great practical significance to our country, which would make our country create a powerful transformation from the furniture high-carbon consumption and man-ufacturing power to the green consumption and creative power.