bluuebunny/crossref_metadata_2025 huggingface dataset:
A Received Signal Strength Indication Adaptive Algorithm for Wireless Sensor Network
Authors: Huang He , Luo Bin
Published: March 2013

Indoor environments are complicated and changeable, and RSSI (Received Signal Strength Indication) observations have great randomness, so the classic RSSI estimation algorithm has poor results in indoor environments. To solve this problem, a RSSI adaptive estimation algorithm (RAE-IW) based on Kalman filtering algorithm is presented in this paper, which achieves exact RSSI estimation, and fast adapts to the change of environmental parameters. Simulation results show that RAE-IW has low complexity, performs better than classic estimation methods in indoor environments, and applies to indoor wireless sensor network.
Research of MOEMS Pressure Sensor
Authors: En De , Zhou Chang Sheng , Wei Huang He , Wei Na Na , Shi Xiao Long
Published: March 2013

In recent years, with the development of optical communication by leaps and bounds, promote the Micro-opto-electro-mechanical system (MOEMS) development. As a new technology, the MOEMS have been widely used in optical communication, optical switching, data storage, optical sensing and etc.. Compared with the traditional pressure sensors, the optical pressure sensor based on MOEMS has some unique advantages. In this paper, the structures, operation principles and fabrication processes of various MOEMS pressure sensors are described mainly. Finally, the structure and Key technology of a MOEMS pressure sensor array is presented in brief.
Research on Micro Inertial Sensor Error Compensation Technology in SINS
Authors: Zhang Jian Ming , Zhang Xing Hui
Published: March 2013

The micro inertial sensor parts (gyroscope and accelerometer) measurement error is the main factors to influence the accuracy of the inertial navigation system, in order to improve the navigation precision of SINS (strap-down inertial navigation system), we must reduce inertial sensor measurement error. Based on the error analysis of the inertial measurement device, with accelerometer attitude computation information as gyro attitude computation information reference quantity, established the algorithm of the attitude angle. In the sensor output signal pretreatment technology, this paper mainly introduced the use of surface fitting technology, to establish the error compensation surface equation, and gives the mathematical derivation of calculation error model parameter, the experiment got a good compensation effect.
Authentication Scheme between the Vehicle Alarm with Remote Control and Mobile Phone
Authors: Niu Quan Ying , Zhang Wen Yi , Shang Ming Zhe
Published: March 2013

The existing vehicle alarms with remote control are facing security challenges due to their own characteristics. Their security mechanism should take into account both the security and the system performance. Authentication is an elementary protocol in constructing a secure system. A new authentication scheme is proposed here, in which a remote control becomes effective after it is certified by the owner’s mobile phone, and then its registration information is stored in the vehicle alarm. In addition, the mobile phone can make the remote control lose its effectiveness by sending signal to the alarm. The authentication scheme settles the problem of security which is caused by the remote control lost or stolen.
Research on Micromechanical Machining Technology of Micro-Flow Sensor
Authors: Lv Hui , Liu Shi Bin
Published: March 2013

The development of micro-flow sensor is based on the employment of the technology of MEMS and micro-packaging application. The micro-flow sensor has many good performances, such as low cost, high sensitivity, and good stability, which make it show a prospect of wide range of research and applications. This paper briefly introduces some basic knowledge of the micro-flow sensor. Then we choose several typical micro-flow sensor and analyses their operating principle, structure, micromechanical machining technology, application and so on.
The Application of Programmable Controller to Chip Design
Authors: Lan Shi Hong , Zhang Jian
Published: March 2013

In the field of modern industrial control, PLC has become the important equipment in automatic control. With the development of semiconductor technology, chip technology, the embedded PLC chipset emerged. The chipset microcontroller cores, PLC system software is loaded with high-performance, low power consumption, small size and other characteristics. User to flexibly customize according to their needs, using chipsets embedded PLC. This paper described the PLC chip design and application.
An Improved Anti-Collision Algorithm in RFID System
Authors: Sheng Hui , Wang Yan Ping , Zhang Xin Bo , Wang Xiao Ling
Published: March 2013

Tag collision problem is the key issue that affects the reading efficiency of the RFID system. This paper presents an improved binary tree anti-collision algorithm based on the jump dynamic tree.We used stack technology, backward strategy to avoid the reader identifying the tag from the tree roots. We used thinking of reducing bit to avoid the reader sending the highest collision bit set 0, which effectively reduce the data transmission bits. The simulation results and analysis show that that the efficiency of the algorithm has been obviously improved.
A Collaborative Drawing Model Based on RMI
Authors: Wang Wei Fu , Wang We Hua
Published: March 2013

With the issue in the traditional remote collaborative work, proposed a collaborative drawing model based on RMI technology. It is easily to work in phase among the remote people by this method and the efficiency of project design and resolve problem has been increased effectively. With the base of anglicizing the principle of the RMI distribute technology, expatiating the key technology go the system.
A Hardware Design of Fish Tank Intelligent Purification System
Authors: Lin Mei
Published: March 2013

In the breeding process of Tropical fish,water quality and temperature have higher requirements. This paper mainly introduces a kind of fish tank intelligent purification system.This system with the control core of STC89C52 single-chip microcomputer adopts photoresistor and LED technique at the same time, realizing the real-time collecting the data about water quality and light source. Through the above analysis of the data,this system completes the function of intelligent water purification in fish tank. This system features in compact module, simple circuit, powerful functions and flexible expansion.
Research on Dynamic Measurement System for Bulk Material Based on Machine Vision
Authors: Li Ping , Wang Yan Wen , Xu Cong
Published: March 2013

In order to improve measurement accuracy and reduce maintenance work of dynamic measurement system, research is proposed on non-contract measurement method based on machine vision. To choose real-time measurement system of mining car as test object, and use binocular vision to calculate 3 D coordinates of contour, and obtain the values of volume and weight with material through operation. Test platform and work flow is designed in detail. A calibration method combined the advantages of optical calibration with camera calibration itself is proposed. To simplify the extraction and matching of feature points through using structured light. Test results show that this method can effectively improve the accuracy of dynamic measurement system for bulk material.
Innovation Application Research on the Computer Technology in Machinery Manufacturing
Authors: Tan Li
Published: March 2013

With the development of society, people's living standard is increasing, and various aspects of the personalized demand change stronger. The machinery manufacturing industry faces the severe challenge although it has already penetrated into all walks of life and has become the foundation of industry. The emergence of the computer leads the manufacturing industry into the era of information. It is used as a new tool to enter the factory, making the manufacturing industry undergo tremendous changes, Based on the analysis of the computer's application in mechanical manufacturing, this paper exploratory analysis the innovative application in machinery manufacturing.
Image Enhancement Based on the Minimum Entropy and Rough Sets
Authors: Tong Li Yuan , Guo Hai Tao , Zhang Rui Lan
Published: March 2013

The method using the minimum entropy and rough set theory is presented. In the method, the threshold of the gray values of an image is calculated using the minimum value of entropy and an image is divided into some sub-images using the rough set theory. The sub-images are enhanced using different sorts of transforms of gray scale. As an application, the image of high-voltage transmission lines is processed with the presented method. As a contrast, the image is also processed with transformation of histogram equalization. The experimental results show the presented method is more feasible. One of the major characteristics in the presented method is that the threshold is calculated using the minimum value of entropy.
A Hybrid Optimization Method for Neural Tree Network Model
Authors: Qi Feng , Ma Ying Hong , Liu Xi Yu
Published: March 2013

Neural tree network model has been successfully applied to solving large numbers of complex nonlinear problems in control area. The optimization of neural tree model contains: structure and parameter, the major problem in evolving structure without parameter information was noisy fitness evaluation problem, so an improved genetic programming algorithm is proposed to synthesize the optimization process. Simulation results on two time series prediction problems show that the proposed strategy is a potential method with better performance and effectiveness.
A Novel Real-Time Facial Expression Capturing Method
Authors: Wang Yong Sheng
Published: March 2013

In this paper, we propose a new facial expression capturing method in real-time mode. Our proposed method main includes two processes: 1) Online process and 2) Offline process. The offline process adopt human face database to build 2D face model and 3D shape model, and then train an expression feature model. Afterwards, online process extracts feature points from human face images, and then obtains facial expression by SVM classifier which is trained from offline process. The main creativity of our method lies in that we propose an effective face detection approach and propose an optimal evaluation method to facial expression recognition. Experimental results show that our approach can capture facial expression precisely in real-time mode.
RFID-Driven Graphical Method for Describing the Time-Sensitive State and Position Changes of WIP Material Flows in a Job-Shop Floor
Authors: Cao Wei , Jiang Ping Yu , Sauser Juergen , Deuse Jochen
Published: March 2013

The purpose of this work is to develop a graphical method for describing the work-in- progress (WIP) material flow of a workpiece in order to realize RFID-driven real-time data sampling and support following-up Auto-ID computing. Firstly, various processes in a job-shop floor are formalized graphically by using different types of state-blocks, which depend on RFID detecting spaces and tag detections. And then an event set is deduced from the connecting relations among state blocks and is used for creating the event-driven graphical model in the context of the WIP material flow of a workpiece. To verify the feasibility of the proposed method, a description case is given.
The Simulation Research of Double Fed Wind Generator Fault Diagnosis Based on MCSA
Authors: Shi Xian Jiang , Ge Fu Peng , Sun Han , Meng Qing Chun , Si Jun Shan
Published: March 2013

In order to research the possibility of Motor Current Signature Analysis (MCSA) applied to fault diagnosis of double fed wind turbine generator system and overcome the defect of sensor stalled installed inconveniently with regular vibration inspection method constructs a simulation model of double fed wind turbine generator with SIMULINK, which uses PWM module for stator excitation and the signal of rotating speed and torque of external dynamic changes to simulate the fault of wind turbine motor transmission system, and then verifying the accuracy of fault features of stator current when generator system has fault by emulating and analyzing the response process of signal in the stator current of generator with different situations.
Innovative Systems for Seismic Protection of Precast Industrial Buildings
Authors: Valente Marco
Published: March 2013

An innovative dissipative (INERD Pin) connection system, which was previously developed for seismic resistant X-braced steel frames, was applied to retrofit existing precast industrial buildings designed only for gravity loads. Nonlinear dynamic analyses were carried out and the effectiveness of the dissipative connection system was evaluated. The INERD Pin connection system increased both the deformation capacity and the stiffness of the buildings, reducing damage of the structural elements. In case of low seismic actions, the INERD Pin connection system especially enhanced the stiffness of the structure, causing only small reductions of column rotations and top displacements. In case of severe seismic actions, the addition of the dissipative connections showed all its effectiveness particularly for low rotation capacity at column base, increasing the energy dissipation capacity and reducing the displacements of the structure. The results of the numerical investigations demonstrated the possibility to reduce the seismic vulnerability of existing precast buildings by means of dissipative connection systems.
The Nonlinear Characteristic of Vibration Signal in Milling Flutter Process
Authors: Wu Shi , Jia Yun Tong , Qu Da
Published: March 2013

In order to analysis the nonlinear characteristics of vibration signal in the milling chatter process, this article uses Lyapunov Exponent and Approximate Entropy to analysis vibration signal of stable milling, vibration signal of chatter development and vibration signal of chatter in varied cutting-depth milling process. Plot the relationship curves of milling parameters with Lyapunov Exponent and Approximate Entropy respectively. The results showed that vibration signal had strong chaos characteristics when the milling chatter developed and occurred, and chaos characteristics of the vibration signal can be regarded as an effective method to identify the development and occurrence of chatter, and it also has guiding function for choosing milling parameter.
Research on Hydrostatic Supporting Temperature-Rise of Heavy NC Machine Tool
Authors: Zhang Yan Qin , Li Rui , Dai Chun Xi , Shao Jun Peng , Yang Xiao Dong , Sun Gui Tao
Published: March 2013

With heavy NC machine tool is widely used in many oil pad round guide hydrostatic bearing as the research object, in the under condition of variable viscosity, establish oil film viscosity-temperature equation. Adopt finite volume method, simulation the hydrostatic bearing internal fluid temperature field under different flow rates on the speed of 6R / min. Numerical simulation hydrostatic thrust bearing oil film temperature field, can find a general high temperature region, and then take effective control temperature. It can achieve the hydrostatic thrust bearing oil film temperature field prediction for engineering practical oil chamber structure, offer the theoretical foundation for optimization design.
Study of Screw Holding Capability of Micron Wood Fiber Molded Products
Authors: Pan Cheng Yi , Ma Yan
Published: March 2013

This paper put forward the method to calculate screw holding capability for micron wood fiber molded products. First, the mechanical model of screw holding capability has been established. Second, the function of force distributing to the threads has been deduced. Finally, the equation of screw holding capability was put forward. Using this method, we can calculate the screw holding capability of micron wood fiber molded products for screws of various geometric parameters by means of computer rapidly. The strength safety can be estimate for screw joints in micron wood fiber molded products accurately.
Calculation of Speed Ratio of Two-Stage Helical Gear Reducer for Minimum Mass
Authors: Pan Cheng Yi
Published: March 2013

This paper analyses distribution of the total speed ratio of two-stage helical gear reducer. On the minimum mass and contact strength condition , the optimum speed ratio equation is derived. By means of the least square method, the fitting formula of calculating optimum speed ratio on minimum mass candition is obtained. Using this formula, the optimum speed ratio of two-stage helical gear reducer having minimum mass can be found quickly and accurately.
Effects of Die Tooth Profile on Forming Helical Tooth Shaft in Cross Wedge Rolling
Authors: Yan Hua Jun , Liu Jin Ping , Hu Zheng Huan , Han Peng Biao , Mao Hao En , Ma Shi Bo
Published: March 2013

The study on forming helical tooth shaft processes in cross wedge rolling can contribute to the advantages of material-saving and efficient. Die tooth profile is an important process parameter of cross wedge rolling helical tooth shaft. Three kinds of forming process of die helical teeth were simulated by DEFORM-3D finite element analysis software to analyze three different die helical tooth. According to the tooth forming characteristics, the effects of three kinds of die tooth profile on forming of a polled piece were analyzed. When rolling a polled piece using the die with the same addendum width, it is convenient for die processing and the effect of polled piece forming is better; when using the die with the narrow front and gradually wider rear, the defects of uneven tooth bottom and larger pitch may happen. The rolling experiment was made by using the die with the same width at the tooth bottom. The results are in good agreement with the simulation. Therefore, we should use the die with unchanged addendum width, tooth height and the sidewall proportional increased when designing the die.
Dielectric Charging Failure Analysis of RF-MEMS Switch
Authors: Song Ming Xin , Zheng Guo Xu , Wu Rui
Published: March 2013

MEMS devices commercialization is hindered by reality problems. Among them main problem is caused by dielectric charging. This paper studies charging model and charges distribution which are constructed on adhesion failure. Lifetime prediction formula is given. Simulation results show that under the condition of low driven voltage requirement, lifetime is bigger than 1000 hours when elastic coefficient (K) adopts 4-16N/m, 0.4-1μm for dielectric thickness, 2-5μm for plate distance and S3iN4 as dielectric material. At last, C-V performances inflected by dielectric charging is studied by theoretical calculations and analyzing positive or negative charging respectively.
The Characteristic Simulation Analysis Method Based on the Theory of Similarity for Combined Interface of Heavy Machine Tools
Authors: Ren Sheng Le , Dai Ye , Che Ming , Du Xu
Published: March 2013

The research on the combination of the characteristics becomes extremely important to the success of machine tool design. This paper mainly studies the dynamic and static characteristic parameters of heavy machine tool guide-way joint. And put forward a practical machine tool combining surface analysis method according to the experimental verification. It is presented that small linear guide as a scale model based on similarity theory. And make a research on the static and dynamic characteristics of small guide joint and the conclusion extended to heavy machine set of faces. And the conclusion is extended to the heavy machine set of faces. The results can be used as reference data about structure and design of the machine tool due to the similarity principle and error range.
An Investigation of Performance Characteristics of High-Voltage Trigatron
Authors: Chen Yong , Cheng Yong Sheng
Published: March 2013

A new-style high-voltage switch named trigatron with great advantage, such as simple structure and applying circuits, wide operational temperature and voltage range, short delay time, long operational life is introduced in this paper. Firstly the four operational modes which trigatrons are suitable for pulse power devices are presented. Then through experimental study and theoretical analysis, the effect factors of turn-on time of trigatrons are summed up, including anode voltage, triggering voltage and triggering-wire’s length, finally giving a conclusion that the higher anode voltage and triggering pulse voltage are, the more steady and shorter turn-on time is.
Research on Cutting Force Spectrum Character and Tools Vibration Character under Titanium Alloy End-Surface Turning
Authors: Zhang Wei , Zheng Min Li , Li Ying Bin
Published: March 2013

titanium alloy cutting force testing experiment of end-surface turning is made, and spectrum character is analyzed by obtained data of cutting force experiment, and ten the influencing rule of cutting parameter on cutting force character is discovered; using the similarity between tools vibration character and cutting force spectrum character, and based on obtained data of machined surface roughness testing experiment, the two characteristic parameters of vibration frequency and amplitude value relative to work piece is calculated, and the relationship curve between cutting parameters and tools vibration character parameter is established is this paper.
Clipping Performance of the Structure with Cavities under Plane Impact Loads
Authors: Gao Guang Fa , Li Yong Chi , Yuan Shu Jie , Li Xu Yang
Published: March 2013

An advanced structure containing cavities was adopted in distribution layers. A series of large-scale similarity-simulation tests was conducted on the defense effect of the four structures under plane impact loads. Based on the tests results and theoretical analysis conclusions, numerical simulations were developed by LS-DYNA software. The results indicate that the numerical results agree well with the test data; the stress peak was distinctively decayed below the cavities, and the defense effect of circle-section cavity is more effective than square-section cavity while the defense effect was weakened when a thin steel plate was laid above the cavities. Compared with clipping performance of it under the explosion loads of mass ammunition, which of the structure with cavities under plane impact loads is better effective. This work provides an important basis for designing the scientifically safe distribution layers.
Research of Flow Field for Irradiation Box of Cable Ultraviolet Cross-Linking
Authors: Tang Jia Dong , Lu Yi Ping , Han Jia De , Wang Zuo Min
Published: March 2013

In order to analyze the cooling air velocity and pressure distribution characteristics in a ventilation scheme presented for the irradiation box of cable ultraviolet cross-linking, the three-dimensional solid model of the irradiation box was established, its flow field was simulated by software FLUENT according to computational fluid dynamics principle under some calculation conditions. The results show that the air velocity around the cable is higher, enhancing convective heat transfer effect, the irradiation box large space is under negative pressure condition.
The Application Profile of Water Transfer Printing in the Product Design
Authors: Du Qiang , Zhang Li , Zhang Jian Yi
Published: March 2013

This paper briefly introduces the water transfer printing craft's basic concepts and characteristics, water transfer printing technology classification, material that water transfer printing technology uses , water transfer printing process of applications and the analysis of water transfer printing technology application prospect .
Research on Meshing Theory and Simulation of Noninvolute Beveloid Gears with Crossed Axes
Authors: Yu G.B. , Wen J.M. , Nie J.F. , Dai B.
Published: March 2013

Crossed axes noninvolute beveloid gears meshing with line contact has been studied in this paper. The engagement equation and tooth profile equation have been presented by applying the theory of gearing. Meanwhile the tooth profile errors and axial errors have been calculated by means of numerical analysis and provided a theoretical way to calculate the induced normal curvature along the normal direction of the contact line in this paper.
Research on Piston Jitter Phenomenon of 8" Spinning Brake Cylinder
Authors: Zhao Jin Ling , Yang Zhuo Juan
Published: March 2013

The phenomenon of the piston jitter during charging and discharging test with the 80kpa for the spinning brake cylinder is been studied and the corresponding measures for improvement is been carried out. The tests show that the phenomenon of piston vibration is disappeared after the measurements are adopted.
Research through Design of a One-Dimensional Cable-Rod Deployable Mechanism
Authors: Hao Guang Ping , Meng Fan Zu , Zhang Yong De
Published: March 2013

With the development of human space exploration activities, the structures of many spacecrafts tend to be large. Due to the limitation of payload envelope size in the launch vehicles, large space structures must be folded in a limited space, and stretch to the desired configuration after reaching their orbits. Large space structures can be basically classified as assembling structures, expansive structures and deployable structures. Deployable structures are the most widely used, and the rod-shaped space stretching arms are the most widely applied one-dimensional space deployment mechanism. Currently, there are mainly three forms of rod-shaped space stretching arms are used in the field of aerospace: Storable Tubular Extendable Member[1,2], Coilable Mast[3], and hinged-rod stretching arm[4,5]. Hinged-rod stretching arm now becomes the studying focus of rod-shaped deployment mechanism for its precise positioning due to high strength and stiffness and characteristics that is in line with the large-scale spatial structure. The designs of a one-dimensional cable-rod deployment mechanism which is cable-driven based on the contrast of working principle and working characteristics of existing rod-shaped space deployment mechanism, and also some research was studied on its working principle and key technologies.
Research on Linear Array TDI-CCD System with Noise Suppression
Authors: Li Ke Ming , Zhang Chao
Published: March 2013

Noises in the imaging process will result in image measurement errors, so whether these noises can be effectively suppressed is the key to improve the measurement accuracy. This paper analyzes the noise components of TDI-CCD system from three perspectives, builds the mathematical model of typical noises, designs correlated double sampling noise processing circuit for TDI-CCD system, realizes the software implementation of hardware design and achieves the purpose to improve the signal-to-noise ratio and image quality
Structural Design and Simulation Analysis of Ejector Used in Automotive Power Steering Oil Discharge Equipment
Authors: Cheng Kai , Zou Hai Lin , Kong Xiang Chao , Tang Jie
Published: March 2013

The structure of ejector used in automotive power steering oil discharge equipment is designed in accordance with the theory of gas-liquid ejector.The two important parameters of the ejector are elected respectively to five values and then 25 ejector models are obtained by the permutations and combinations.The ejector’s CFD model is created by Fluent module of Ansys,then it is divided into a grid and analyzed. Analyse its pressure distribution and velocity vector, which provides the optimal size for the manufacture of the ejectors and a theoretical basis for experiment.
Simulation on Multi-Oil-Cavity and Multi-Oil-Pad Hydrostatic Bearings
Authors: Xu Xiao Qiu , Shao Jun Peng , Yang Xiao Dong , Zhang Yan Qin , Yu Xiao Dong , Gao Bing Wei
Published: March 2013

Taking multi-oil-cavity and multi-oil-pad hydrostatic bearings as studied projects, firstly make brief instructions for structure characteristics and working principal of hydraulic system; Then, build three-dimensional models of multi-oil-cavity and multi-oil-pad hydrostatic bearings respectively. Adopting finite volume method, oil film mesh is generated by universal finite analysis software CFD; then, carry on numerical simulations for pressure distribution and temperature distribution of the two studied hydrostatic thrust bearing under various viscosity, and make comparative analysis for difference between the two studied hydrostatic thrust bearing. Based on the analysis of numerical simulation results, the conclusions whether oil-return groove is set for hydrostatic bearing could be received. Simulation results reveal truly the influence of setting oil-return groove or not on hydrostatic thrust bearing, and improve structure design for hydrostatic thrust bearing.
Journal Bearing Rotor Speed Effect on Dynamics Coefficients and Film Pressure
Authors: Hu Nai Wen , Yu Guang Bin , Wu Xue Mei , Hu Chang Sheng , Qu Zhi Gang , Ge Jiang Hua , Chen Ming
Published: March 2013

The dynamic coefficients and film pressure effect in rotor-bearing systems may lead to an unstable station. The mechanism of the dynamic coefficients and film pressure induced thermal instability in the rotor-bearing system has been studied. The journal bearing model is adopted for the derivation of analytical expressions. The results show that the rotor speed has some effect on bearing dynamic coefficients and film pressure.
The Gas Flow Simulation of Tokamak’s Inflatable Pipeline
Authors: Zhou Hong Wei , Chen Yong , Wang Jin Cong , Huang Xiao Zhou
Published: March 2013

Inflatable pipe is an important part of the tokamak's experimental device. This paper first introduces the composition, functions and working mode of the inflatable pipe. Then it's based on the fluid dynamics to establish model of the inflatable pipeline and the nodes. Finally, using the finite volume method to complete a numerical analysis of gas flow in the tokamak's pipeline. The results show that, if it needs to get the gas flow of the H2 that is 400 Pa•m3/s at the valve in the Pipeline, it needs to set the value of the inlet pressure that is 1.5 bar. The larger diameter of the pipeline, the more increase rate of gas flow in the pipeline.
Real-Time Rendering for Multi-Layered Translucent Materials such as Human Skin under Dynamic Environment Lighting
Authors: Yang Meng Zhao , Wang Kuan Quan
Published: March 2013

Human skin is a highly scattering translucent material and is difficult to be scaled. In this paper, we combine approximation of specular reflection with subsurface scattering in the texture space and introduce the dynamic environment lighting to render the human skin to obtain a much more realistic expression. Considering lower computation and requirement for real-time, we use few spherical harmonics coefficients to represent the environment lighting approximated by the environment map. Further, by rotating the environment map, we obtain dynamic rendering effect of human skin appearance, which has a great practical value for creation of virtual character in real scene.
Development of Indoor Purification Materials in China
Authors: Zhuo Yu Guo , Liu Jun , Shi Bi Qing , Zhang Yu Chun
Published: March 2013

The common indoor air purification materials that are activated carbon, enzyme, and photocatalyst in China are introduced in this paper. The characteristics and present research states of typical air purification materials are reviewed. The composites will be the focus in the future.
Orthogonal Design Investigation on Wear Resistance with Non-Smooth Surface
Authors: Yang Zhuo Juan , Yang Xiao Dong , Wang Qing Cheng
Published: March 2013

The wear resistance with non-smooth surface was studied by the method of orthogonal design using MG-2000 wear test machine. The model specimens made of W9Cr4V high speed steel with regular concaves were processed by Laser texturing technology. Temperature, concave diameter and concave distance were taken as test factors, each factor selected 2 levels. The test results show that temperature is the biggest influence on wear resistance of non-smooth concave specimen, concave diameter is secondly, the concave distance is not obvious. The test results provided preliminary experiment data for the selection of non-smooth surface size and density distribution.
Study on Cu Passivation Film’s Forming Condition in HEDP Electrolyte with BTA and Chloride Ion
Authors: Wang Jin Hu , Zhai Wen Jie
Published: March 2013

The influence of corrosion inhibitor BTA, chloride ion and anodic potential on the formation of copper passivation film was studied in the electrolyte of 18wt% HEDP by using Linear Sweep Voltammetry (LSV) and electrochemical impedance spectroscopy (EIS). The results show that the increase of BTA concentration contributes to the formation of surface passivation film, and the chloride ion can promote the formation of the Cu passivation film at low concentrations but break it down when its concentration exceeds a certain limit. For each electrolyte there is a threshold anodic potential maintaining good passivation: the interfacial charge transfer resistance increases with the anodic potential when it is below the threshold potential and decreases when it is above the threshold potential. Smooth surface can be obtained by ECMP at the optimal processing condition.
Numerical Simulation and Test Research of Pneumatic Drying on Biomass Fuel
Authors: Wang Xin Hai , Lv Wei , Zhang De Li , Zhang Xiao Nan , Zhao Zhong Xia
Published: March 2013

Based on the mechanism of mass and heat transfer of the particles and air in drying tube，the mathematics model of pneumatic drying process was established which referred to straw fuel in straight horizontal tube. The simulating results were summed up. Test bed of pneumatic drying was established，the test results were summed up by making single-factor test on the test bed. The results of simulating and single-factor test were coincided, and the pneumatic drying process was divided into two parts which were high-speed drying area and slow drying area. The effect factors were analyzed which were initial water content, hot air temperature, mass of hot air and materiel. The most important factor in gas flow drying on straw fuel was summed up which was the mass of hot air.
Analysis on the Public Street Furniture Design in Cold Cities
Authors: Shen Tong , Yu Wei Wei , Zhang Li
Published: March 2013

Through the research, we make an exploration to public street furniture design in cold cities , focus on analyzing the impact that climate to cold cities of public street furniture. Then make an analysis of the situation about cold cities public street furniture design and many other issues systematically, aimed at the constituent elements of the urban environmental facilities, thus give some advice which is helpful to improve public street furniture design in cold cities, response to the unfavorable factors of the cold climate, in order to seek a scientific design method to create a comfortable and pleasant public street furniture in cold cities.
The Feedback Control of an Ultralow Frequency Vibration Table Based on a Fuzzy Self-Tuning PID Controller
Authors: She Tian Li , Yang Qiao Yu
Published: March 2013

An ultralow frequency vibration table can easily receive external interferences when it works. These interferences result to distortion of the output and reduction of calibration precision. A new method was adopted to reduce the distortion of an ultralow frequency vibration. At first, we modeled a vibration table by analyzing its structure, so that we got its transfer function. Then a fuzzy self-tuning PID controller was introduced and it was based on closed loop feedback theory. We verified the controller by MATLAB and experiments on an ultralow frequency vibration table. Simulation and experiments show that the fuzzy self-tuning controller can effectively reduce the distortion of a vibration table.
Self-Tuning Weighted Measurement Fusion Kalman Signal Filter
Authors: Liu Wen Qiang , Tao Gui Li , Gu Ze Yuan , Li Song
Published: March 2013

For the single channel autoregressive moving average (ARMA) signals with multisensor and a colored measurement noise, when the model parameters and noise variances are partially unknown, based on identification method and Gevers-Wouters algorithm with a dead band, a self-tuning weighted measurement fusion Kalman signal filter is presented. A simulation example applied to signal processing shows its effectiveness.
The Research on Detection Method of Multi-Gas Sensor Based on BP Neural Network
Authors: Zhao Wen Jie , Zhou Zhen , Yu Ming Yan , Wang Meng Meng , Shi Yun Bo
Published: March 2013

In the paper the multi-gas sensor are detected aimed at the problem of cross interference between the eight kinds of toxic and harmful gases. The cross sensitive characteristics between the different gases are determined through the interference degree, and the cross sensitive model with the environment parameters is built. The BP network is designed with the Matlab toolbox and the data are trained. The results show that the forecast accuracy of the gas concentration can be improved effectively, and the average relative error is reduced. So the new method is put forward to solve the cross interference problem of dangerous chemicals gas effectively.
Analysis of Defect Magnetic Flux Leakage Field Based on Dipole
Authors: Gao Jun Shan , Wang Jin , Wang Ke
Published: March 2013

This paper makes an exhaustive analysis to common defect magnetic leakage field based on dipole theory, obtaining the analytical expression of some common injury shapes and exploiting distribution curves of the magnetic field intensity by MATLAB software, and based on this a new scheme is proposed to simulate various injuries using an ellipsoid tables defect model, and finally confirms the superiority of ellipsoidal model in analysis of defect leakage field by comparison.
A Wireless Sensor Network Routing Scheme for Timely Environmental Monitoring System
Authors: Wan Xiao Xia , Wu Guo Min
Published: March 2013

Environmental Monitoring system has become more and more critical for biological protection recently. To get timely information from monitored environment, a timely wireless senor network routing scheme (TNRS) is proposed, which is made up of three phrases: initial setup, route discovery and establishment, data communication and route maintenance. In the first phrase, every sensor node will get the initial route table. In the second phrase, source node will find its own path with high fitness value. In the third phrase, data transmission and route maintenance are done under ACK confirmation mechanism. Simulation shows that TNRS routing scheme can decrease data miss ratio by 24.88%, and reduce average data latency by 14.85%, compared to SPEED routing scheme. So TNRS scheme can provide better real time service for environmental monitoring system.
A New Automated Essay Scoring：Teaching Resource Program
Authors: Wang Ji Jun
Published: March 2013

This study focuses on the automated essay scoring system: Teaching Resource Program (TRP) from a cross-disciplinary perspective. Different from previous research, this research emphasized the functions of Teaching Resource Program in the respect of evaluation and the capacity to enhance the writing competence. In what follows, we attempt to specify Teaching Resource Program and its contributions. We start with a brief introduction to Teaching Resource Program. Then, we provide the techniques, related theories, and computer programs used in Teaching Resource Program. We have found in this research that Teaching Resource Program and evaluations of e-writing are highly significant correlation. Based on these findings, some useful implications from this study include that automated essay scoring system: Teaching Resource Program needs to be further incorporated with the evaluations of other disciplines. We end the study with the conclusion that Teaching Resource Program contributes to evaluate e-writing pieces, consequently enhances the students' writing performance and further advances the development of writing curricula and other disciplines.
Optimum Grinding Parameters for CRYSTOE and NEOPARIES Based on Orthogonal Experiment
Authors: Xu Li , Li Hong Dong , Zhou Li Li
Published: March 2013

Abstract. As a new material ,CRYSTOE and NEOPARIES are widely used in aerospace and military equipment, its surface quality requirements is very high. CRYSTOE and NEOPARIES disc convex machining has done a lot of trials. And analyzed the experimental data by using Orthogonal test method get the optimal processing parameters. It also provide a reference for future processing tests.
Design and Manufacture of a Temperature Adaptive MEMS Wind Speed Sensor
Authors: Liu Jia Jia , Zhao Wen Jie , Nan Hui Jie , Li Guo Long , Shi Yun Bo
Published: March 2013

In this paper, an AlN-based hot-film wind speed and direction sensor was designed through the thermal analysis of two-dimensional flow field, realized the measurement of wind speed and direction. The 2D micro structure sensor was prepared by lithography process and laser micro machining process on 0.2mm thick AlN substrate. It is composed of a heater in the middle, four temperature detectors around and a temperature sensor. The sensor has a small volume, a low power consumption, it is easily to be integrated, can be applied to a variety of portable flow meters and gas flow detectors of the complex environment.
Research on Lane Marking Lines Detection
Authors: Tan Hui , Wang Jian Feng , Zhang Kun , Cui Sheng Min
Published: March 2013

Nowadays traffic accidents occur more and more frequently, as a result, intelligent vehicles develop more and more quickly. In many research directions of intelligent vehicles, vision navigation becomes the hot spot. An algorithm of the present lane left-right marking lines detection was proposed in this paper. The algorithm combines edge detection and Hough transform, firstly detects the initial lane marking lines and then tracks the final target lines. Simulation results indicated that the algorithm could recognize the present lane marking lines to make vehicle navigation precise and fast.
Experimental Study of Supporting Force of the Bionic Water Strider Model
Authors: Wang Qing Cheng , Yang Xiao Dong , Cao Guo Hua , Xu Hong Ji
Published: March 2013

Abstract. The supporting force model of the bionic water strider model was established through mechanical analysis, the critical conditions of which the bionic water strider model’s legs pierce the water surface were analyzed. The bionic water strider model with 4 legs was manufactured, super hydrophobic copper wire was fabricated, which was as the bionic water strider model’s legs. The maximum supporting forces of the bionic water strider model was measured through the test, which was compared with the calculated value according to the supporting force model, the error rate is 9.3%.
The Analysis of Remaining Oil in High Water Cut Stage
Authors: Fu Cheng , Huang Bin
Published: March 2013

The remaining oil distribution is very complex and the difficulty in tapping measures is more and more big when the west block of South-eight area has gone into the ultra-high water cut stage. So the remaining oil distribution in 109 units has been comprehensively studied on the condition that the composite water cut reaches 9.06% by establishing reservoir geologic model and proceeding reservoir numerical simulation according to recent tapping measures and remaining oil analysis experience in the process of adjusting scheme. And combined with some reservoir engineering methods such as: waterflooding characteristic curve and material balance method, obvious effects has been obtained in this research.
Fault Diagnosis of the Relief Valve Based on Fractal Box Dimension of Autoregressive Bispectrum Slices
Authors: Xiao Ying , Liu Xiao Mei , Chen Jian Can
Published: March 2013

After data preprocessing,the autoregressive(AR) bispectrum diagonal slices were figured and fractal box dimensions were calculated. The results show that the box dimensions are different in evidence under different conditions. So the fault pattern recognitions of the relief valve are effective by the method of using fractal box dimension of AR bispectrum diagonal slices, it provides a simple and accurate method for fault diagnosis of the relief valve.
Research on Simulation and Design of Dynamical Vibration Absorption Lathe Tool with Large Length to Diameter Ratio
Authors: Qin Bai , Zhang Bo , Wang Quan Fu , Ji Ya Juan , Zhao Yan Jiang , Yu Xiao Dong , Ma Yu Qiu
Published: March 2013

The dynamic simulation analysis method is adopted to investigate the dynamic damping characteristics of lathe tool with large length to diameter (L/D) ratio. The multi flexible body dynamical simulation model of dynamical damping lathe tool with large length to diameter ratio is built up according to the actual experiment lathe by using the software ADAMS and ANSYS. Simulation analysis of the multi flexible body dynamical model which has been optimized shows that the system damping performance is improved greatly. On this basis the relationship of rubber bush, mass body and vibration absorption cavity is discussed. And the result of the discussion indicates that the shape of rubber bush should be confirmed by repeatedly simulating the model.
Analysis on Dynamic Failure of Steel Cable-Stayed Double-Layer Grids under Strong Earthquake
Authors: Wang Ding , Li Hai Wang , Liu Jing
Published: March 2013

In this paper, the analysis on dynamic failure behaviors of steel cable-stayed double-layer grids used in a gymnasium with the function of earthquake victim shelter is carried out under EL-centro wave with SAP2000, and the appraisal results on their anti-failure performances are presented under strong earthquake action based on the plastic-hinge theory. In the analyses, the geometric and material nonlinear effects are considered simultaneously. The plastic development level of the rod, the deformed shape and the failure type and the ductility are estimated. The results show that the failure model of the structure under the earthquake wave action is the complicated combination of strength failure and elasto-plastic dynamic local buckling in deferent areas of the structure; When the structure reached its failure critical limit, the development of the plastic hinges is sufficient and 59.5%of the rods enter into their plastic stage; The ratio of its maximal failure node vertical displacement and its plane diameter is 1/115; Its critical failure peak acceleration of EL earthquake wave when applied in the combination of three directions is 3655gal, which is 8 times more than the official seismic fortification level of 8 degree (major earthquake, 0.2g) and can be served as earthquake victims shelter in the area of 8 degree seismic fortification; Its displacement ductility coefficient is 5.54,which shows the structure owns good energy dissipation capacity.
Restoring Force Models Investigation of Research Status and Problems Analysis of RC Structure
Authors: Zhang Pin Le
Published: March 2013

Restoring force model is a simplified mathematical model derived from restoring force-deformation curves in lots of tests. Selecting a reasonable restoring force model is the basis of conducting dynamic nonlinear analysis of structure. The work further investigates the advantage and disadvantage of the restoring force models presented in this paper. Classified and brief comments about the existing drawbacks of restoring force models and its application are conducted. Lastly, some useful suggestions are proposed for the further research.