bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research on Structure Design of LED Fluorescent Lamp Microstructures Diffuser and the Effect on the Optical Properties
Authors: Zheng Xiu Ting , Wei Hai Long , Li Shi Bao , Wu Da Ming , Liu Ying , Zhang Ya Jun , Xu Hong , Zhou Yang
Published: June 2013

This thesis is devoted to the research on different microstructures design of lighting LED fluorescent lamp diffuser,and the simulation analysis of the light and distribution graph of 2D microstructures array diffuser of C semi-cylinder lens and V-cut prism,diffuser of microlens array 3D microstructures and non-micro structure diffuser by software Light Tools,then comparative analysis the transmittance and uniformity of these diffuser.The finding indicate that,Compared with none microstructure and 3D microlens diffuser,2D microstructure diffuser can achieve LED fluorescent lamp uniformity and transmittance reached more than 85%, it can realize the excellent integrated optical properties indicators of LED fluorescent lamp light uniform distribution,Not only realize the energy saving and avoid glare effect.
Effect of the Light Diffuser Plate of Micro V-Cut Prism Structure on the Optical Property of LED Daylight Lamp
Authors: Zheng Xiu Ting , Gao Xiao Long , Li Shi Bao , Wu Da Ming , Liu Ying , Zhang Ya Jun , Xu Hong , Zhou Yang
Published: June 2013

In the paper, the transmission process of light in the light diffuser plate of micro V-cut prism structure was analyzed and the uniformity and transmittance of the diffuser were calculated based on Light Tools software; At the same time, the effect of micro V-cut prism structure, namely the height of the prismthe width of the prismthe aspect ratio of the prism and the arrangement of the prism on the uniformity and transmittance of the diffuser were simulated. The result shows that the light diffuser plate of micro V-cut prism structure has effective diffusion on the LED daylight lamp which integrated optical property of the uniformity and transmittance is more than 85%; Furthermore, the aspect ratio of the prism has a big influence on the optical property of the diffuser, it shows that the integrated optical property of the diffuser is best when the aspect ratio is 1.2.
Study of Eddy Electromagnetic Fields Induced by Propeller Rotating in the Earth's Magnetic Field
Authors: Zhang Jia Wei , Gong Shen Guang , Lu Xiong
Published: June 2013

A mathematical analytic expression is proposed to calculate the eddy electromagnetic fields induced by rotating simplified propeller model based on Faradays law. The simulation of this model gives the distribution characteristics of the induced electric field signals. The longitudinal characteristics and transit characteristics shows the transit characteristics is discrete and has apparent characteristics.
The Testing and Research of a New Large Bag Filter with the Diaphragm Valve
Authors: Liu Lin , Peng Yuan , Cheng Kuang
Published: June 2013

The diaphragm valve is the key component of the deashing device in a pulse bag filter. It affects the investment cost, operation cost and the floor area, as well as the wide application of the dust removers on jetting performance directly. The development of a low pressure valve with a diameter of 100 was optimized by orthogonal test. The large-sized low-pressure diaphragm valve with the jetting and technical economic performance has been widespread used in market, it was better than small-sized one by parameter comparison between another similar one, the valve body resistance is decreased with the rise of diameter.
Modeling and Acceleration Response Analysis for Vehicle Drivability
Authors: Liu Pu Hui , Zhang Tong
Published: June 2013

Vehicle drivability is now one of the keystones of product quality, and is refined aggressively to achieve vehicle brand differentiation and market position. This paper starts with an illustrating of drivabilitys definition, and then the objective measure metrics and model-based approach for vehicle drivability development during advanced vehicle and powertrain system development process are analyzed. The accelerator pedal aggressing and pedal-acceleration response characteristic as drivability critical factors are investigated emphatically at last.
Finite Element Analysis of the Spindle Ram-Slider Assembly Body on the Domestic Large Gantry Machine Tool
Authors: He Xin Yuan , Tian Ye , Zhao Hong Wei , Shi Cheng Li , Liu Pi Xin
Published: June 2013

Machine working environment was simulated by using ANSYS software for analysis and calculation. Modal analysis results indicated that machine tools didn't produce resonance during the machine working. Harmonic response analysis result shew the displacement response frequency was 42Hz along the Y, Z two directions on the bottom of ram, and X direction's response frequency was 43 Hz. The conclusion given by this paper has guiding significance to use the machine safely in the future.
Performance Analysis of Solar Evacuated Tube Collector
Authors: Fang Wen Bo
Published: June 2013

The high temperature operation of Evacuated Tube Collectors (ETC) and their very low radiant heat losses make them ideal for solar water heating, solar space heating, desiccant air conditioning, thermal driven cooling and industrial process heating applications. The work temperature of common ETC can reach 100~ 250°C. The vacuum tube envelope minimizes heat loss and ensures high collector durability and steady performance. This paper investigates different types of solar thermal collectors and compared them so that the result which the heat loss of ETC is least is obtained. The thermal analysis and performance of ETC are investigated as well.
Optimum Vibration Control of a Nonlinear Damper System under Multi-Axis Excitations
Authors: Lu Zheng
Published: June 2013

This paper presents an investigation of the vibration control performance of a nonlinear damper system under multi-axis excitations, focusing on its optimum strategy. The nonlinear damper system is composed of a particle damper and a primary structure. Cross-correlation functions and auto-correlation functions are shown to be suitable means to interpret the physics involved in the behavior of such a nonlinear system. Using different types of random excitations, the optimum operating regions are all determined, within which particles move in a plug flow pattern and correlation functions decay much faster than that under the inefficient operating conditions.
The Method of Accurate Variable Curvature Crowning of Involute Straight Bevel Gear
Authors: Zhang Fang You , Tian Xi Jie , Cui Huan Yong , Liu Tai Ran
Published: June 2013

Involute straight bevel gear pair often appears the phenomenons of meshing interference, impact and "end contact" in the course of meshing. Usually, symmetrical crowning is adopted to improve above phenomenons, however, due to the influence of complicated tooth loads and other complicated factors, the symmetrical crowned gear may not reach a good modification effect. In this paper, we adopt target variable curvature crowning according to the specific conditions of bevel gears in order to obtain good modification effect, nevertheless, because of the complexity of the variable curvature crowning, the conventional method of using space spherical involute stretch and sweep standard gear model to remove tooth surface materials has been unable to meet the accurate requirements of the variable curvature crowned model, at the same time, this method can not realize parametric modeling of modification bevel gear. Therefore, this paper puts forward an easy to realize parametric modeling method of accurate variable curvature crowning for involute straight bevel gear based on ANSYS/LS-DYNA, Imageware, Matlab and Solidworks. This method can realize the accurate modeling for variable curvature crowned involute straight bevel gear and ensure the accuracy of modification gears and follow-up finite element simulation, meanwhile, it provides theoretical basis for parametric modeling of variable curvature crowned involute straight bevel gear. Finally, the superiority of variable curvature crowning is tested through numerical simulation under specific conditions.
Three-Roll Planetary Rolling Mill Motion Analysis and Test Research
Authors: Yin Zi Wu
Published: June 2013

Against defects of three-roll fixed axis rolling mill caused by rolled piece rotating in process of rolling, presented three-roll planetary rolling scheme, designed the planetary transmission system structure, expounded planetary mill rolling process, analyzed movement relationship between planet carrier, roll and rolled piece according to planetary gear train transmission principle. The rolls do planetary motion and spinning motion both, the former acts on the rolled piece to make it do clockwise rotation movement, the latter acts on the rolled piece to make it do anti-clockwise rotation. The actual movement of rolled piece is combination of the two motions. The theoretical analysis and calculation shows that in rolling process of planetary mill, the speeds of above two kinds of motions are very close, directions are opposite. Due to rolls are inclined compare to the rolled piece, as a result rolled piece does axial movement with a speed of vsinα, radial rotation speed is 0.0029 times of planet carrier rotational speed. Thanks to complexity of extrusion and friction between rolls and rolled piece, the actual speed of rolled piece is approximately zero. Prototype rolling test has verified correctness of theoretical analysis and calculation.
A Single Side-Band Modulation Circuit in Underwater Electric Current Communication
Authors: Zhou Sui Hua , Feng Shi Min , Chen Zhi Yi
Published: June 2013

On the basis of the carrier has a low frequency in underwater electric current communication, carrier phase shift network, low frequency wide band phase shift network and multiplier circuit were designed to realize the single side-band (SSB) modulation. The circuits were designed and debugged. Through testing the actual circuits, sideband suppression ratio obtains 36dB which can satisfy the underwater electric current communication system. It will be stated reference on actual application for SSB modulation with low carrier frequency using phase shift method.
Study on Electrical Properties of Activated Carbon Black Filled Polypropylene Composites Using Impedance Analyzer
Authors: Ding Nai Xiu , Wang Li Li , Zuo Pei Yan , Li Yong , Liu Guang Ye
Published: June 2013

Carbon black was activated and then filled into polypropylene to prepare conductive composites, of which the electrical properties, including impedance Z, phase angelθ and dissipation factor tgδ, as a function of frequency and carbon black concentration were investigated using impedance analyzer. The percolation threshold of 5wt% carbon black concentration was obtained. It was found that the variation of AC electrical properties as a function of frequency is dramatic and dependent on the carbon black concentration. It was also found that dependence of the real part and the imaginary part of impedance on frequency decreases with the increased concentration of carbon black, while that of phase angle and dissipation factor increases. Based on the corresponding results, the conductive network model and the corresponding equivalent circuit were constructed.
High Accuracy Modeling Method of UTC-PD Photodiode
Authors: Wen Hua Feng , Nie Qiu Hua , Xu Tie Feng , Liu Tai Jun , Ying Xiang Yue , Clark Kevin , Li Ying Feng
Published: June 2013

The high accuracy modeling is a prerequisite to study UTC-PD matching circuit design and power combining. This paper presents the high accuracy modeling method of UTC-PD photodiode. The measured frequency response curve of photoelectric conversion was used as a benchmark, and the model of the equivalent circuit was modified consistently in order to make the frequency response curve of the model fit the measured frequency response curve. This method addressed effectively the modeling issues of UTC-PD photodiode.
A New Design of CMOS Bandgap Reference Based on Genetic Algorithm
Authors: Yu Jian Hai , Dong Chang Chun
Published: June 2013

A new CMOS bandgap reference which is optimized by adaptive GA(genetic algorithm) is presented in this paper. During the optimization of the parameters, according to the different specifications, the idea which looks on secondary targets as the boundary restrictions is proposed, so that the problem of multi-objective normalization is solved. The secondary optimizing method about coarse adjusting initially, meticulous adjusting successively is proposed in the optimization based on adaptive Genetic Algorithm. The simulation results which have reached the leading standard of industry indicate the advantage and validity of the method comparing with other method used in the design of bandgap references.
An Arc Welder Monitoring System Research and Design of High-Speed Camera Trigger
Authors: Jiang Zhi Yong
Published: June 2013

Based on CO2 gas shielded arc welding of short circuit transfer welding current waveform changes with microcontroller core control with TTL counter as a basic circuit, the design an arc welder monitoring system the high-speed camera composition trigger circuit to solve the high-speed camera shutter trigger open the question of and actual monitoring system is verified.
The Spontaneous Radiation of Verticalcavity Semiconductor Optical Amplifiers in Bistable Effect
Authors: Li Zhou
Published: June 2013

A bistable model is established including the effect of spontaneous emission in a vertical cavity semiconductor optical amplifier (VCSOA). The sensitivities to the amplified spontaneous emission (ASE) of the bistable characteristics in a VCSOA and a traditional edge emitting SOA are compared by numerical analysis. The control of the bistable characteristics and the degeneration of the bistability hysteresis are also analyzed by utilizing the modified model.
Research on Rotation Modulation for INS Based on MEMS Sensors
Authors: Wang Xue Yun , Wu Jie , Wang Wei
Published: June 2013

nertial sensors based on Micro-electro-mechanical systems (MEMS) are leading a great prospect because they are cheap, small and light. However, large errors limit their applications in many Inertial Navigation Systems (INS). To improve accuracy of INS based on MEMS sensors, a systematic error auto-compensation method, Rotation Modulation (RM) is introduced. RM improves navigation performance without involving any other information sources, saving the essential characteristic of self-contain. The RM effects on sensor biases and navigation errors are analyzed. Different RM schemes including elements like number of rotating axis, rotation direction, continuity and speed are discussed. An INS based on MEMS sensors with an appropriate RM scheme is developed. Static and land vehicle tests are conducted, verifying the effectiveness of RM on improving inertial navigation performance. Through introducing RM, attitude accuracy is improved by 5 times, and velocity/position accuracy by nearly 10 times.
Application of Sensor on Modern Sizing Machine in Term of Intelligent Control
Authors: Tong Yun
Published: June 2013

Concerning intelligence control of sizing machine in textile process, resistance strain gauge sensor is used to detect the winding tension of weavers beam, capacitance level transducer can be used to monitor the level of size glue in sizing box so as to maintain the constant sizing regain , photoelectric encoder is a key device for regulate the elongation for various zone with the help of frequency converter governed by PLC , photoelectric encoder is indispensable for regulation of elongation.4444
Research on Direct Calibration of Electromagnetic Flowmeter in Partially Filled Pipes
Authors: Yin Shi Yi , Li Bin
Published: June 2013

The methodology of the direct calibration for the electromagnetic flowmeter in partially filled pipes is presented in this paper. Based on the principle of the electromagnetic flowmeter, two main respects, including the flow liquid level and the weight function in partially filled pipes are introduced briefly, and the calibration technologies of the sensor, which consist of the device arrangements, the accurate measurement of the liquid level and the calibration of the flow discharge, are emphasized on, with the methodology based on the piecewise interpolation employed. The experimental results demonstrate that the methodology of the direct calibration is simple and effective for the real flow calibration of the electromagnetic flowmeter in partially filled pipes, with the stable measurement and the accuracy requirement satisfied.
Optimizing Design of a New Micro-Structural Gas Sensor
Authors: Liu Chang Bai , Zhang Xiao Bo , Liu Li , Zhang Jin Bao , Li Shou Chun , Shan Hao , Wang Lian Yuan
Published: June 2013

A new kind of electrode was designed for micro-structural gas sensor based on silicon substrate. The temperature distribution was simulated by means of finite element analysis tool ANSYS, in order to obtain higher temperature and uniform temperature distribution in the micro-gas sensor, the thickness of SiO2, thickness of Si substrate, electrode width and electrode space is designed to be 50, 250, 10 and 350 µm, respectively. The magnetic field distribution was also analyzed by ANSYS, and the results show that the new electrodes can eliminate the magnetic field from the heater on the measurement signal interference, which is benefit for the improvement of sensor performance.
The Effect of ESD EMP Test on Wireless Antenna and Protection Network Design
Authors: Chen Zi Peng , Dai Ya Wen , Li Peng , Li Zhuo Qiu
Published: June 2013

According to IEC61000-4-2, the influence of ESD EMP on the wireless antenna is studied by the injection experiments and radiation experiments in this paper. The results of experiments show that the ESD EMP has significant influence on the wireless antenna, and various kinds of failures such as breakup, restart may be occurred. In order to solve this problem, a wireless protection program has been designed, in which the TVS diode was used as the first lever for protection and the π-type high pass filtering network as the second lever. This program not only has the traditional function of ESD protection, which can avoid the high voltage damage to the internal circuit, but also achieve the purpose of load matching, ensuring the signal source not distortion.
Localization and Map Building of Laser Sensor AGV Based on Kalman Filter
Authors: Guo Li Xiao , Kun Fan , Yan Wen Jun
Published: June 2013

Localization and navigation algorithm is the key technology to determine whether or not an AGV (automatic guided vehicle) can run normally. In this paper, we summarize the popular navigation technologies first and then focus on the positioning principle of Nav200 which is adopted in our AGV system. Besides that, the map building method and the layout of the reflective board is also introduced briefly. This paper introduced two navigation methods. The traditional navigation method only uses the sensor data and the electronic map to guide AGV. To improve positioning accuracy, we use the Kalman filter to minimize the error of localization sensor. At last some simulation work was done, the results shows that the localization accuracy was improved by adopting Kalman filter algorithm.
Design and Implementation of Environmental Monitoring System Based on Bus
Authors: Liang Sheng , Pan Gao Feng , Zeng Shan Ping , Xie Yong , Xue Jun
Published: June 2013

In order to realize the real-time environmental monitoring for shipboard TT&C antenna-centrosome, this paper designs a monitoring system based on Modbus by analyzing current conditions, which contains sensor data acquisition terminal and video switcher. The designed system has many advantages, such as less project-related work, higher cost performance, convenient installation, easy debugging and etc. Actual application shows that temperature & humidity data and video information gathered meet the requirement need completely. Techniques in this paper can be referenced in other related fields.
Quantitative Estimation with Lift-Off Effect in Conductive Structure
Authors: Tang Hua Yi , Pan Shu Li , Huang Ping Jie , Hou Di Bo , Zhang Guang Xin
Published: June 2013

Eddy current testing technique has been widely used in a variety of fields, many researches have been done in quantitative estimation in conductive structure. In the actual use of ECT system, lift-off effect is an inevitable factor which is still a challenging task. Hence, the objectives of this study are to introduce a novel model-free method Support Vector Regression optimized by Particle Swarm Optimization (PSO-SVR) to estimate the surface defect with variable lift-off. Experimental validation carried out that the proposed method had a good performance in surface defect estimation with lift-off effect.
Research of Benzoyl Peroxide Residues in Flour by Terahertz Spectroscopy Technology
Authors: Feng Lu , Cai Jin Hui , Zhang Guang Xin , Huang Ping Jie , Hou Di Bo
Published: June 2013

Nowadays, the issue of food safety has become the focus of the whole society. So we need to establish an efficient, accurate and non-destructive detection technology of food safety as soon as possible. Terahertz wave ranges between microwaves and the infrared light in the electromagnetic spectrum, which has a very important research value and a good application prospect. As a new detection technology, Terahertz time-domain spectroscopy can meet the needs of non-destructive detection of food safety. In this paper, we use THz-TDS technology to measure and analyze the THz spectra of flour brightener. By measuring and analyzing the pure substances and mixtures of flour and brightener, we preliminary prove that THz technology can be used in qualitative and quantitative detection and analyzing of flour quality.
Analysis of Hydrostatic Guideway Error Based on Multi-Head Pump
Authors: Long Xing Yuan , Yang Shuming , Yuan Guang Tao , Wang Jin Long , Jiang Zhuang De
Published: June 2013

Base on the force balance theory, a model is set up to analyze the hydrostatic guideway with the closed four pads. Each oil pocket force is calculated, which is caused by the gravity center and the driving center of a slide carriage. According to the hydrostatic theory, the oil film variation that is generated during the movement is obtained. It is composed of linear and angle errors. The results show the driving force center and the geometrical center of the slide carriage have an effect on each oil film thickness, as well as the size and the location of the driving force. The article states their relationship and supplies the theoretical foundation for the design and employment of the hydrostatic guideway.
A High-Performance Digital Servo Driver for Magnetic Levitation Planar Motor
Authors: Huo Li Gang , Zhou Yun Fei , Liu Guang Dou
Published: June 2013

A new digital DC servo driver based on DSP and FPGA for planar motor was designed in this paper. Current feedback and digital self-tuning PID algorithm control strategy are applied. Switching power amplifier or class D amplifier is the choice of power amplifier. The most prominent characteristic of the servo driver used in planar motor is high efficiency, low temperature drift, small size, fast response, and high-bandwidth. Finally, the performance parameters and power loss parameters of the servo driver are given.
The Research on the Ignition System of Engine Combustion Bomb
Authors: Yi Xiao Bing
Published: June 2013

Combustion bomb of constant volume is an important experimental tool and platform for basic research of engine combustion theory. With the engine combustion status, this paper design ignition and timing control systems for constant volume combustion bomb to provide accurate ignition parameters. And test test showed that the ignition system is feasible to meet the constant volume combustion bomb ignition and timing control requirements.
Study on Attenuation Characteristic of Carbon Nanomaterials Smoke to Laser
Authors: Wang Hong Xia , Song Zi Biao , Liu Dai Zhi
Published: June 2013

In order to study the infrared interference characteristics of nanocarbon materials smoke, a large smoke chamber and laser test device were used to measure the attenuation characteristic of carbon nanofibers and nanographites smoke for laser. The mass concentrations were measured to obtain the rate of forming smokescreen for nanocarbon materials, and the smoke transmittance to infrared laser were measured to get attenuation characteristic of nanocarbon materials with different sizes. The test results provide the application basis of nanocarbon materials in passive interference fields.
Structural Design and Realization of Wheel-Legged Obstacle Crossing Vehicle
Authors: Li Min Yan , Guo Dong Lei
Published: June 2013

High threshold of watertight door makes it difficult for materials transporting in the cabin by ordinary equipment. So, an un-powered mechanical structure is presented by the thesis, which can cross watertight threshold easily. On the basis of this structure,an obstacle crossing vehicle is designed for materials transporting in cabins.
Characteristics Analysis of Giant Magnetostrictive Actuator Applied in Jet-Pipe Servovalve
Authors: Li Yue Song , Zhu Yu Chuan
Published: June 2013

In order to improve the performance of jet-pipe servovalve, a novel pilot stage for jet-pipe servovalve driven by giant magnetostrictive actuator is presented, and its working principle is given. On the basis of Jiles-Atherton’s theory of magnetism, the dynamic nonlinear model of giant magnetostrictive actuator is deduced to analyze the characteristics. The simulation results shows the peak time of GMA is less than 0.5ms at the driving current of 1.5A, and the bandwidth can be reached up to 900Hz, but the static performance is worse than the torque motor applied in conventional jet-pipe servovalve.
Study of Co-Simulation of Rehabilitation Robot for Upper Limb Based on Virtual Prototype
Authors: Lan Zhi , Yan Zhen , Xu Jian Jun
Published: June 2013

A novel rehabilitation robot for upper limb, which can implement single joint and multi-joint complex motions and provide activities of daily living (ADL) training for hemiplegic patients, was presented. Based on the software ADAMS and the software MATLAB/Simulink, the virtual prototype and the platform of co-simulation of mechanical-electrical system were set up. On the platform of co-simulation, the rehabilitation robots kinematics, dynamics and control have been simulated, and each joints kinematic parameters, torque can be obtained, and parameters of controller can be also confirmed. It offered reliance for the actual intellectual control of the rehabilitation robot.
Study of Barrel Bending Measurement and Correcting Model with PSD and Gun Barrel Robot
Authors: Meng Xiang Fei , Wang Chang Ming
Published: June 2013

To solve the problem that bending caused by the weight of gun barrel will affect firing accuracy, the paper put forward a method that uses position sensitive detector (PSD) , gun barrel robot and some other testing equipments to carry on a automated measurement on gun barrel, and establish a correcting model according to the measured results. By this way it can amend gun launch angle to improve firing accuracy and the hitting accuracy of first Shot.
Realization of the Postprocessor of Intelligent Turning-Milling Combined Machining Cell Based on UG NX
Authors: Shen Nan Yan , Yu Zhi Xiang , Li Jing
Published: June 2013

The post processor of the flexible machining cell (FMC) composed by turn-mill machining centre and transport robot, which realizes some special functions such as automatic loading and unloading, turning-milling combined processing, keeping account of the man hour and so on, is developed by NX/Post Builder. The post processor is verified by the results of the case study using a special-shaped shaft. The development method discussed in this paper beneficial for producing an advantage of FMC to improve machining efficiency can also be used for reference to realize the postprocessor of other kinds of combined machine tools or machining cells.
Target Recognition Based on Polar Coordinate Template Matching
Authors: Yao Ce , Xiu Chun Bo
Published: June 2013

In order to improve the rotation invariant property of the conventional template matching method, a novel template matching based on the polar coordinate was proposed. The origin of the polar coordinate was at the center of the template. And the matching result was central symmetry, which made the method have the translation and rotation invariant properties simultaneously. The recognition process was divided into two phased. In the first phase, gray information was used to complete matching calculation, and some candidate points were selected according to the matching result. In the second phase, edge strong matching of candidate points was completed. The candidate point, where the sum of gray matching value and edge strong matching value was minimal, was determined as the best matching point. Experiments results show that this method can meet the real-time requirement of the TV tracking system.
Shot Cut Test Based on Mathematics Parameter and Chain Code
Authors: Wang Jian Feng , Zhao Xiao Rong
Published: June 2013

In this paper, An effective shot cut detection algorithm directly in DCT domain was proposed. This algorithm(including abrupt change and ) test the n -1 frame and n frame through the extracting the feature vector of each frame. When extract the features of frame, two-dimensional mathematics parameter m1-s from DCT coefficients without its inverse transform and 8 directional chain code was computed, Divide m1-s space into 30 unequal partitions (subspaces) and compute the numbers pr within the 30 subspaces (entries) as the feature vector to judge the different of the two frames. locating shot cuts is operated by comparison tests.
INS/GPS Integrated Navigation Method Based on Neural Network
Authors: Xu Tian Lai
Published: June 2013

Inertial Navigation System (INS) and Global Positioning System (GPS) are commonly integrated to overcomes each systems inadequacies and provide an accurate navigation solution. However, the positioning accuracy deteriorates with time in the absence of GPS signals. This paper proposed an artificial neural network aided INS/GPS integrated navigation method to bridge the GPS outages. In this method, the neural network was trained to model the error of INS when GPS was available. INS velocity and attitude error were got by implementing the neural network when GPS outages occurred. Simulations in INS/GPS integrated navigation showed improvement in positioning accuracy for GPS outages.
A Resilient Particle Swarm Optimization Algorithm with Dynamically Changing Inertia Weight
Authors: Wu Zhi Dong , Zhou Sui Hua , Feng Shi Min , Xiao Zu Jing
Published: June 2013

To overcome the shortage that the particle swarm optimization is prone to trap into local extremum searching for the lost in population diversity, a strategy in which the velocity is not dependent on the size of distance between the individual and the optimal particle but only dependent on its direction is proposed. The average similarity of particles in the population is seem as the measure of population diversity and it is used to balance the global and local searching of the algorithm. Based on establishing the relationship between inertia weight and the measure of population diversity which has been inserted into the algorithm, A resilient particle swarm optimization algorithm with dynamically changing inertia weight (ARPSO) was proposed. ARPSO was applied in simulation experiment. The results show that the algorithm has the ability to avoid being trapped in local extremum and advance the probability of finding global optimum.
A Hybrid Intelligence Algorithm for No-Wait Flow Shop Scheduling
Authors: Wang Fang , Rao Yun Qing , Tang Qiu Hua
Published: June 2013

Constraint simplified mixed integer programming model was presented based on time transformation mechanism of no-wait flow shop. And a hybrid intelligence algorithm which combines the advantages of heuristic algorithm and neighborhood search algorithm was proposed. The initial population was generated by Johnson method, NEH method, Rajendran Method, Dannerbring method, and heuristic rules. The crossover and mutation operators in each generation were introduce neighborhood search (NS) and tabu search (TS). And the optimal individual was reserved in each generation. We compared the new hybrid intelligence algorithm (abbreviation H&NSGA ) with the algorithm blending heuristic and GA (NSGA), the algorithm blending neighborhood search and GA (HAGA), GA with the optimal individual reserved, and results show that the results and stability of solutions based on H&NSGA are better than the other three algorithms.
The Description and Characterization of Symmetric Frames and Gabor Frames and Applications in Material Engineering
Authors: Chen Qing Jiang , Lei Xiao Ting , Zhou Jian Feng
Published: June 2013

Materials science is an interdisciplinary field applying the properties of matter to various areas of science and engineering. In this paper, we discuss a new set of symmetric tight frame wave-lets with the associated filterbanks outputs downsampled by several generators. The frames consist of several generators obtained from the lowpass filter using spectral factorization, with lowpass fil-ter via a simple approach using Legendre polynomials. The filters are feasible to be designed and offer smooth scaling functions and frame wavelets. We shall give an example to demonstrste that so
-me examples of symmetric tight wavelet frames with three compactly supported real-valued sym-
metric generators will be presented to illustrate the results.
More Efficient Methods among Commonly Used Robust Estimation Methods for Similarity Transformation
Authors: Yuan Yuan , Ge Yong Hui
Published: June 2013

mage calibration is a necessary step in image processing. Similarity transformation is a widely used image calibration method. Robust estimation methods are often used to eliminate or weaken the influences of gross errors on image calibration. However, different robust estimation methods have different capabilities in eliminating or weakening gross errors. The current paper employed simulation experiments using different coincident points and the number of gross errors included in the observations to compare the robustness of 13 commonly used robust estimation methods. Results indicated that L1 and GermanMcClure methods are relatively more efficient than other robust estimation methods for image calibration based on similarity transformation.
Research on Technology of Broadband Optical Fiber Access Network System
Authors: Li Zhou
Published: June 2013

This paper first briefly introduces the basic overview of the broadband access and the classification. Second this paper focuses on broadband access network technology application of optical fiber, finally puts forward the development of the optical fiber broadband access network might cover APON, BPON and EPON phase, from broadband pointto-point Ethernet fibre optic system and GEPON start and even finally GPON phase transition to the initial assumption.
Physical Layer Security Solutions for High Speed Data Networks
Authors: Mao Zhi Jie , Wei Jiang Tao , Li Hong Wei , Wu Qiong , Qian Feng Chen
Published: June 2013

To improve the confidentiality and availability of the network, it is important to provide multilevel security in the physical layer of optical networks. Based on the orthogonal characterization of OFDM, we introduce a new electronic encryption method for the encryption of the subcarriers symbols after data mapping. Since all-optical networks are emerging as implementations for very high data rate communications, flexible switching and broadband application support, we present a novel all-optical security system technique using random sequence encryption. The noise function was applied via a pseudo-random noise generator seeded with an encryption key. We analyze the performance of both security systems under different application circumstances. Our results confirm the effectiveness of the security technique to make the system less vulnerable to attack.
An Empirical Study on Small Enterprises E-Commerce Adoption Decision Based on TAM Model & TOE Framework
Authors: Shi Bin
Published: June 2013

Electronic commerce is one of the important means for small enterprises to innovate business model. In order to more deeply understanding the phenomenon, this paper systematically reviews related research about key factors affecting small enterprises E-commerce adoption decision, establishes theoretical model of small enterprises E-mmerce adoption decision based on TAM model & TOE framework, and proposes the corresponding research hypothesis. The identification of the key factors influencing small enterprise E-commerce adoption not only supplies practice guidance for enterprise innovation, but also helps to improve innovation success rate for enterprise technology and management .
The Search Technology of Query Expansion Based on the Agriculture Information
Authors: Zhang Shu Dong , Wang Jing
Published: June 2013

Because of the rapid development of Internet and information retrieval technology, and the massive amounts of complex agriculture information resources, how to retrieval the required information conveniently and accurately is an important research point that we have to overcome. In this paper, we get the information database through the initial retrieve of the existing agricultural search sites. By the method of combining the feature extraction with similarity computation based on HowNet to query extended the keyword. With the extended keyword we make a second retrieval and use the result as the finally search information to improve the recall ratio and the precision rate of the agriculture information query.
Chemical Reaction Optimization for Task Mapping in Heterogeneous Embedded Multiprocessor Systems
Authors: Xu Cheng , Li Tao
Published: June 2013

With different task mapping and scheduling will lead to different time consumption and energy consumption on heterogeneous multiprocessor systems, using appropriate task mapping and scheduling algorithms can save more energy. In this paper, we propose a new method to solve the task mapping problem. The algorithm consists of two elements: An intelligent approach to assign the execution orders of tasks by task level, and an allocation algorithm based on chemical-reaction-inspired metaheuristic called Chemical Reaction Optimization (CRO) to map processors to tasks. The results show that it can use less time to reduce more energy consumption.
A Digital Filtering Approach in Measurement and Control System
Authors: Li Chang Hai , Yu Yuan Tao , Song Shu Lin , Liu Yan Chun
Published: June 2013

Digital filtering through a certain calculation orprogram determination to reducing the proportion of noise interference superimposingon the useful signal, so as to improve the quality of signal acquisition. Thedigital filtering is realized by program and does not need additional hardware，anddifferent filtering methods or filtering parameters can be used according todifferent signal, so it has good stability, strong function. Digital filteringhas stronger capacity in inhibiting the interference from low frequency signal.
Personalization Information Retrieval Based on Topic Directory
Authors: Yu Yang Xin , Zhang Yi Zhou
Published: June 2013

Personalization information retrieval is very useful in information retrieval system, the user profile can be used to represent the favorites or interests of user. This paper introduces how to automatically learn user interests, build user profiles and re-rank search results.A topic directory method is proposed to calculate the semantic similarity, which takes multi-inheritance into consideration, and then optimize the computing process based on the tree structure of inheritance relationship. Experiments are conducted to compare our method with the popular directory based search methods (e.g., Google Directory Search). Experimental results show that the proposed method in this paper can effectively capture personalization and improve the accuracy of personalized search over existing approaches.
Based on TSIP Protocol GPS Data Decoding Algorithm
Authors: Sui Shou Gang , Liu Cun Gen , Gao Huan Bing
Published: June 2013

TSIP protocol is another code of GPS data which is different from NMEA0183. TSIP protocol supports 9600 baud rate or higher. TSIP protocol is duplex system, and in this protocol we can quickly obtain GPS information by using the special order instead of passively waiting. In this paper, the algorithm of GPS data based on TSIP protocol is proposed, and the advantages and disadvantages of TSIP is analyzed.
Application of Change Control Technology in Weapon Equipment Software Configuration Management
Authors: Zheng Cui Fang , Jiang Li Qin , Wu Zhi Jie
Published: June 2013

Software configuration management (SCM), usually call configuration management, it runs through the entire software life cycle, it can bring software development onto a repeatable, manageable way. This paper analyze the actuality of weapon equipment software quality management work, combined with the weapon equipment softwares characteristic, SCM implementation process is put forward, then the method, process and requires of SCM are presented in detail, focusing on the change control which is the key process of SCM. According practical software development, it describes the application of change control in Weapon equipment SCM from the state of change request, change control process, change request strategy several aspects.
Haptic Data Compression Based on Linear Prediction
Authors: Guo Feng Hua
Published: June 2013

A new linear prediction-based haptic data reduction technique is presented. The prediction approach relies on the least-squares method to reduce the number of data packets. Knowledge from human haptic perception is incorporated into the architecture to assess the perceptual quality of the compressed haptic signals. Experiments prove the effectiveness of the proposed approach in data reduction rate.
Monitoring and Management of Control System for Concrete Mixing Station
Authors: Zhang Shuan Ji , Xu Wan Ming , Zhang Min Zhe
Published: June 2013

This paper analyzes the concrete mixing station control system problems, put forwards the total design scheme, communication and database configuration, designs the PC management software. Monitoring, introduces user management, basic setting, process parameters, production process monitoring, alarm system, the running task information, material weight measurement; management, focuses on the proportioning management, task management, report management and invoice etc. From the debugging situation, reliable operation, simple operation, convenient maintenance, good results.
Adaptive Feedback Control for a Class of Discrete Chaotic Systems
Authors: Zhang Fang Fang , Xing Jin , Zhao Hua Wen
Published: June 2013

Discrete chaotic systems are more difficult to control than continuous chaotic systems. We discuss adaptive control scheme of continuous chaotic systems published in a series of papers, and study on how the convergence factor affects the convergence time and the property of final control strength by mathematical analysis and number simulations. Then we generalize it into discrete systems satisfying certain conditions and provide mathematical proof. The effect of convergence factor is emphasized. Finally, we apply the scheme to two discrete chaotic systems, which verify its effectiveness.
Temperature Control in Brazing Furnace Based on B-Spline Fuzzy Neural Network
Authors: Yu Qiang Guo
Published: June 2013

According to the temperature control of brazing furnace, a fuzzy B-spline function neural network based on the Particle Swarm Optimization (PSO) algorithm is proposed by using B-spline function as fuzzy membership function and using neural network to realize fuzzy interference, using PSO to completes the network' s weights' learning and training. The result shows the system is validity and feasibility.
Effects of Annealing in Different Atmosphere on the Near-Infrared Shielding Properties of CsxWO3 Particles
Authors: Xu Qiang , Liu Jing Xiao , Shi Fei , Luo Jia Yu , Jiang Yan Yan , Liu Gui Shan
Published: June 2013

Using sodium tungstate and cesium carbonate as raw materials, cesium tungsten bronze (CsxWO3) powders were synthesized by low temperature hydrothermal reaction with citric acid as the reducing agent. Effects of annealing in different atmosphere on the near-infrared shielding properties of CsxWO3were investigated. The microstructure of CsxWO3powders was characterized by X-ray diffraction. The CsxWO3films were prepared on glass using polyvinyl alcohol solution as film-forming agent, and the optical transmission properties of CsxWO3films were investigated. The results indicate that the near-infrared shielding ability of samples after annealed at 200°C in the air atmosphere did not deteriorate apparently, but the 400°C-annealed samples in the air atmosphere showed apparent decrease of near-infrared shielding properties. Annealing in the carbon powder atmosphere had no apparent effects on the properties of CsxWO3particles. As for the N2annealing, the 500°C-annealed samples showed best improved near-infrared shielding as well as high transparency in the visible light region.
Material Analysis on Oil well Wellhead Assembly and Application in Thermal Production well
Authors: Li Ling Feng
Published: June 2013

For oil well, material analysis on oil well wellhead assembly is an important factor of oil production system life. In order to ensure the long-term development of oil wells, this paper mainly introduces the the material analysis on oil well wellhead assembly,such as material analysis for environment-assisted fracture and stress corrosion on wellhead assembly, requirements for materials of oil well Christmas Tree and tubinghead and so on. By taking T1 well as an example, this paper optimizes the material selection of well wellhead assembly for T1 well. For application, the technology above has a good practicality.
Study on Simulation and Design of Fitness Entertainment Machine Based on the Fischertechnik Model and UG, ANSYS
Authors: Hao Si Yu , Yang Ting Ting , Wu Lin
Published: June 2013

Provide an innovative design of a new fitness entertainment machine which based on fischertechnik model.[1] Using fischertechnik creative combination model (fischertechnik) to make conceptual design quickly dematerialized.With the help of software such as UG and Ansys etc, finishing the model building of fitness entertainment machine, the establishing of virtual prototype and optimization of mechanism parameters,local motion mechanism simulation and finite element analysis, thus realizing the entertainment machine which based on optimal design.
A New Design of a Hydraulic Steel Radial Gate with Two Oblique Arms by Topology Optimization
Authors: Cai Kun , He Hong Yang , Li Xin Huan , Li Yan
Published: June 2013

A hydraulic steel radial gate (SRG) with two oblique arms is designed by using topology optimization and size optimization. Topology and size optimization are carried out by using CAD software, e.g., Hyperworks. In the current design, the SRG is initially considered to have three main components, i.e., the arms, the supporting frame of arms and a panel for water retaining. To give a better design of these components, e.g., arms and its supporting frame, topology optimization is adopted. By topology optimization method, the shape of arm and the supporting frame are obtained. As construction of the new SRG is reconstructed by the components obtained, the stiffness, strength and stability of the new SRG is checked and some sizes of components in SRG are readjusted by using size optimization. The final design of the SRG is around 24% lighter than the traditional design whilst the safety of the new design is much better.