bluuebunny/crossref_metadata_2025 huggingface dataset:
Image Defogging Based on Improved Guided Image Filtering
Authors: Shen Peng Fei , Yang Jie , Xiong Yuan Yi
Published: April 2014

In this paper, we analyze the principles of the dark channel prior based on guided filtering image algorithm to defog, pointing out the shortcomings and derive an improved method. Dark channel prior principle is established in the absence of bright areas, which not satisfied Dark channel prior, and thus, the transmittance of the bright areas is estimated error, which will case color distortion of defogged image. By introducing a tolerancemechanism refining the transmittance, the algorithm can effectively handle such problem to overcome the color distortion in bright areas using dark channel prior. Experimental results show that this modification is substantial practicable to restore image, at the same time eliminates the color distortion, significantly improve the visual effect.
Remote On-Line Automatic Monitoring System of Reservoir's Water Regimen Based on WSN and GPRS Network
Authors: Li Wen , Pan Peng , Tan Li Sha , Luo Xue Ke
Published: April 2014

This remote on-line automatic monitoring system is designed based on WSN and GPRS Network, aiming at solving the present problems of low performance in field monitoring of reservoir water, forecasting sudden water pollution accidents, reporting important hydraulic process such as reservoir operation. The system is simulated laboratory water quality analysis process, and achieved long-time unattended reservoir water regimen remote on-line monitoring and optimized reservoir water resource management. By adopting embedded operating system μC/OSII, the system has the function of parallel processing of multi-tasks, including an electrochemical sensor control circuit of lifetime-prolong. The bus mode is introduced to management software design of receiving and analyzing unit. Buses that associated with each component of management software are well connected. All of the above make the overall structure reasonable and orderly.
Intelligent Dispatching Operation System of Power Network
Authors: Chen Su Fang , Tao Mei , Lin Dan
Published: April 2014

This paper researches the corresponding inference-machine, which can adapt to complexity of the net-topology, the diversity of the operation task and the flexibility of operation mode. Multi-agents share information and cooperate to generate the right operation sheets. The system is used in one county power dispatching center.
Tracking Control System Design Based on Adaptive Neural Network
Authors: Cheng Liang
Published: April 2014

The implicit function theorem and the mean value theorem non-affine function of the system into an affine form, and then RBF neural network approximation virtual control and actual control signals desired. Finally Lyapunov functional theory and backstepping method are used to design a self-adapt tracking control scheme. The proposed control scheme can guaranteed to achieve better tracking performance, thus avoiding the problems caused by the high-gain control affine term sector caused by design problems and overcome loop controller. In order to solve practical engineering control problems provides a theoretical basis and can learn from the ideas, and finally through numerical examples to demonstrate the effectiveness of the proposed method.
Design of Speed Loop in Feed System Based on Fuzzy-PI Dual-Mode Control
Authors: Duan Ming De , Wei Bao Lei , You Yan Wei , Wang Yu Ping
Published: April 2014

The fuzzy-PI dual-mode control was designed and applied to control speed loop in feed system of ADGM25 to improve its response characteristic and stability. In order to observe its control ability, the fuzzy - PI dual-mode control and PI control were adopted respectively. The simulation of the feed system was finished by using MATLAB/Simulink. The results show that the control performance of fuzzy - PI dual-mode control is better than the performance of conventional PI control, the maximum over-shoot and setup time decreased by 13%,0.05s respectively.
An Asynchronous Differential Measurement Method for Time-Varying Network Induced Delay
Authors: Liu Juan , Huang Wei , Lv Yue Yue , Peng Zheng Fu
Published: April 2014

This paper proposes a novel asynchronous differential measurement method to compute the time varying network induced delay which exists in each period of networked control systems. It is independent of the whole networked clock synchronization and can compute the real-time system delay during a single period. System structure is designed as a distributed network control system which consists of a network scheduling manager, many sensors nodes, and many controller/actuator nodes. Network model adopts Master/Slaver communication industrial Ethernet. Finally, a numerical experiment is given to demonstrate that, this method has strong potential to improve the performance of system with network induced delay and proves its validity and effectiveness.
Active Power Control Strategy with Auxiliary Frequency Regulation Function of Wind Farms
Authors: Liu Guan Qi , Wu Li Na
Published: April 2014

The fluctuations and uncertainties of wind power increase the frequency regulation pressure of conventional power plants. This paper introduces an active power control strategy with auxiliary frequency regulation function of wind farms. With this active power control strategy, wind farms can work in normal operation mode or in auxiliary regulation mode. Wind farms in normal operation mode can trace the power command to the utmost extent. When the system frequency drops large, to respond this change, the wind farms can switch to auxiliary regulation mode automatically. Simulation results show that the wind farms can assist the conventional power plants to regulate the system frequency effectively.
Design of Automatic Control Pipe Bender
Authors: Shan Yun Xiao
Published: April 2014

The thin wall steel U-pipe is the main component of a heat exchanger. It is extremely applied in various machines such as heat exchanger, air conditioner and refrigerator. However, the handicraft operation method is generally adopted in our country currently with its big labor strength and low efficiency in the actual production process. In order to resolve this practical problem, we design the automatic control pipe bender which can process various radius of the thin wall steel pipe.
Design of the Integrated and Remote Control Information System for Multi-Wind Power Plants
Authors: Wang Wen Zhuo , Xue Yang , Jiao Bo
Published: April 2014

Recently, China has become the country who has the largest and fastest-growing wind power across the world. The large-scale of wind power ask for higher requirements in the fields of Wind Power Plant (WPP) Monitoring and Control. In order to achieve that, the integrated and remote control information system for multi-WPPs is proposed in this paper. To meet the need of technical regulation for connecting WPP to power grid and improve the efficiency of WPP’s management, a framework for this integrated and remote control information system is designed, and some tentative ideas for implementing the integrated control are put forward.
Analysis of a Novel Traverse Mechanism Driven by Non-Circular Gears with Fourier Pitch-Line Applied on Silk Reeling Machine
Authors: Chen Jian Neng , Yan Jiang Jun , Sun Liang , Zhou Ming
Published: April 2014

Insufficiency of traditional EB-type silk reeling machine was pointed out after analyzing its traverse mechanism. A novel traverse mechanism driven by non-circular gears with Fourier pitch-line was proposed in order to make up the insufficiency of the traditional EB-type machine. Kinematical mathematic model of this mechanism was established and an aided analysis and simulation software was compiled. A group of preferable parameters was obtained by means of human-computer interactive optimization method. New advantages of uniform roundtrip velocity and better silk winding shape were achieved by the novel traverse mechanism compared to the traditional EB-type mechanism.
Dynamic Optimization Design of Sand Milling Collection Machinery Suspensions
Authors: Hu Hao , Feng Xiao , Qiu Shi , Yang Dan , Chen Zhong Kai , Wang Xiang Li
Published: April 2014

Sand milling collection machinery is a kind of large machinery to collect the surface soil containing ores. The suspension system of milling machines directly affects the ride comfort and driving safety for the operator; for this end, the design of suspension system has been optimized so as to satisfy the requirements of reliability and comfort by making the console and operator set at the maximum station and minimum absolute acceleration and the amplitude within the range. This paper first established a suspension system model of milling collection machines and set up the state equation of suspension system by applying Lagrange equation. On this basis, this paper conducted the optimized calculation encouraged bt the pavement with sine rule change and obtained an optimal suspension system parameters ki and ci.
Research on Path of Contact Wheel for Ruled Blade Grinding
Authors: Li Da Qi , Zhang Lei , Ye Wei Dong , Zu Hai Ying
Published: April 2014

Blade is one of the important components in aero-engine, turbine, and wind generators. The quality of the blades has big influence on the performance of the machine. So high profile accuracy and low surface roughness were put forward. Ruled blade is just one of the blades of aero-engine, which has simple profile and little distort. This blade was grinded by two sides together in the paper. Therefore, in this thesis, the main objects are as fallow: firstly, according to the characteristics of the abrasive belt grinding, analysis the selection of grinding distance for the blade. Secondly, established the model of contact wheel compare grinding system, derived the range of wrap angle of contact wheel, and then two region were make out, one is the region can be directly grinding, and another region which may lead to wheel interference. At last the grinding path of the center of the contact wheel was obtained by calculated the blade model.
Energy Consumption Model of the Force Application Hydraulic System for Friction Welding Machine
Authors: Yang Zheng Qiang , Du Sui Geng
Published: April 2014

For the problem of low efficiency of the ordinary hydraulic systems of the friction welding machine, operating characteristics and efficiency model of the force application hydraulic system of friction welding machine are studied. The energy consumption characteristics of traditional welding machine are simulated, the efficiency characteristics of the force application hydraulic system of friction welding machine is studied, and the energy consumption and efficiency model are deduced. According to theoretical analysis, the system efficiency can be improved by changing pump output flow and relief output flow. The simulation results show that the working efficiency of the new system can be enhanced to 24%. The new friction welding hydraulic system was used in actual production and the system efficiency can be improved to 22%.
Experiment and Research of Bumper with Double Layer Inflating Safe Cushion
Authors: Fang Qiu , Yang Fu Qing , Meng Meng , Wang Zhong Wu
Published: April 2014

Double layer inflating safe cushion made of rubber and plastic or foam is developed to replace original foam inside bumper, the performance test of the designed safe cushion indicates the cushions advantage of lightweight and shrinkability, while the CAE simulated analysis proves that the cushion can protect pedestrians better and reduce the weight, showing a vast development potential.
The Design of the Automatic Packing Machine for Syringe
Authors: Du Dong
Published: April 2014

The Current domestic production enterprises of disposable syringe in all packaging chain for artificial fill, and complete a thermal sealing, packaging need to be done in a sterile environment down. Due to the low machining efficiency, need a lot of artificial operation, it is difficult to ensure that the quality of the product of uniform manufacturing, is not in conformity with the sterile medical devices industry, the industry standards of fyrogen-free. In order to overcome these shortcomings, we developed a "disposable syringe filler", and applied for national invention patent (patent name: eat hutch waste water purification methods and purification system), the project has been listed as a development zone of tianjin government innovation. This paper introduces the equipment of the system composition, working principle, technological process and control method, in the medical packaging industry promotion value extremely.
Thermal Analysis of a Satellite Borne Instrument
Authors: Chen Bo , Li Ning
Published: April 2014

Thermal design and analysis of a satellite instrument is introduced in this paper. Some methods were adopted to help heat conduct and a finite element model was built. The analysis results showed that the temperature scopes of the main structures are from 45°C to 65.8°C and all of junction temperatures of the components are lower than the derated maximum junction temperatures themselves and leave enough design margins, which match the requirements of thermal analysis.
The View Analysis of Automotive Rearview Mirrors
Authors: Yu Y.W. , Deng Y.M.
Published: April 2014

This paper firstly describes the concept of eye ellipsoid and the calculation about the coordinate of eye point in the SAE J941. And based on it, uses the vector method and the role of reflection to get the equation of view angle about rearview mirrors, and then measures parameters of one real car, finally makes graphics to present the change of the view angle along with the corner of mirror and the position of driver by using the Matlab software.
A Novel Method for Silicon-Beam Fabrication in Wet Etching
Authors: Su Xiang Yong , Jing Zhi Sheng , Cheng Zhi Yong , Zhou Ze Long , Zhu Bing Jie
Published: April 2014

Fabricating silicon-beam through the wet etching has been developed for many years, there are a lot of advantages during the wet etching, low cost, easy to obtain and so on. However the design and fabrication of silicon-beam with polygon section has been confined during the process of wet etching; In order to fabricate more kinds of silicon-beam with the advantages of the wet etching, a novel method to fabricate silicon-beam with polygon section is proposed. The fabricating process has been designed by taking advantage of the protection effect of the SiO2 layer.
Molecular Dynamics Study on the Impact of the Cutting Depth to the Titanium Nanometric Cutting
Authors: Zhu Ying , Zhang Yin Cheng , Qi Shun He , Xiang Zhi
Published: April 2014

Based on the molecular dynamics (MD) theory, in this article, we made a simulation study on titanium nanometric cutting process at different cutting depths, and analyzed the changes of the cutting depth to the effects on the work piece morphology, system potential energy, cutting force and work piece temperature in this titanium nanometric cutting process. The results show that with the increase of the cutting depth, system potential energy, cutting force and work piece temperature will increase correspondingly while the surface quality of machined work piece will decrease.
Optimization Design of LED Display Front Shell Injection Mold on Moldflow
Authors: Dong Lei Lei , Xin Ran Ran , Zhang Hui Min
Published: April 2014

Warping and distortion in plastic parts has been a serious problem in mold-injection.Traditional solution is to first produce a mold and then test the moldrepeatedly. By employing Moldflow, it can be easily to offer a precise analysisand prediction of warping in products. Meanwhile, the results can be used toadjust the designed structure and process conditions of the mold. Finally, themold and its products are optimized.
Research on Aviation Aluminum Alloy Technology CAPP System Based on the Part Similarity
Authors: Lan Guo Wei , Zhuo Yong , Chen Jun Fa , Zhan Hui Xian
Published: April 2014

This paper introduces the basic principle, features and overall structure of Aviation Aluminum Alloy technology CAPP system. It also discusses 3 key techniques of the system : 1. designing Parts Classification Coding System based on Group Technology. 2. key features coding. 3. technology query based on the part similarity. After coding a new Aviation Aluminum Alloy structural part, the system can work out the part similarity between the new part and the existing ones and show the typical technology of the part which has the highest similarity.
Preparation and Characterization of the Al/AlN-Al2O3 Composite Thermal Energy Storage with Phase Change Materials
Authors: Wu Dong Dong , Wang Hua , Wei Yong Gang , Li Kong Zhai
Published: April 2014

Aluminum is supposed to be admirable phase change materials (PCMs) for thermal energy storage due to its excellent heat storage density and thermal conductivity. However, its application is limited because of the flowability and corrosivity when it melt. The Al/AlN-Al2O3composite PCMs with stable thermal energy storage performance were prepared by direct nitridation method. The research showed that nitridation temperature and nitridation time are key parameters of heat storage performance of the composite materials. The morphology and thermal energy storage performance and components of the Al/AlN-Al2O3composite PCMs were investigated by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), X-ray diffraction (XRD). The results showed that the tiny particles of aluminum powders were closely coated by AlN-Al2O3encapsulating materials. This structure can prevent the flowability of the liquid aluminum and also can avoid environmental impact when the it melt, meanwhile , the composite PCMs have the performance such as stability, high thermal storage density.
Analysis of Push-Pull DC/DC Converter by Poincare Mapping Graph
Authors: Shao Zhu Lei
Published: April 2014

Aiming at the problems of the choice of system parameters has great influence on stability of system in the push-pull DC/DC converter system. The relationship between system parameters and system stability was studied based on the push-pull DC/DC converter simulation model of MATLAB. Due to the push-pull DC/DC converter system is nonlinear, the system was analyzed by poincare mapping graph. This paper mainly analyzed the influence of the ratio of converter transformer on system stability. It is shown by simulation that the system operation state transferred from stable period to chaos, when the value of transformer ratio changed from 7 to 4. The study results are valuable for the design of switching power supply system parameters, and would have a wide application foreground.
Reactive Power Compensation Method of HVDC Commutation Failure
Authors: Wang Xiao Ming , Zhang Qi , Qian Bin
Published: April 2014

In the high-voltage direct current transmission system, the difference value between the landing phase voltage and DC transmission system commutation failure of the critical voltage drop value, as system occurred in the critical value of commutation failure. When commutation voltage lower than the critical value would reduce arc Angle, caused by commutation failure。Therefore, by using the method of reactive power compensation to keep converter bus voltage stability, can avoid commutation failure.
Research and Improvement on Calculation Method of Optimal Excess Air Ratio
Authors: Qi Jun Xiong
Published: April 2014

By analyzing the relations of the excess air ratio to heat loss due to exhaust gas, chemical incomplete combustion and combustibles in refuse, the traditional method for solving the optimal excess air ratio is improved. A correction factor is proposed for heat loss due to combustibles in refuse, making the solving method more accurate, which is of great importance for improving the combustion efficiency of the boiler.
Simulation and Research of New MW Wind Turbine Yaw Hydraulic System Based on AMEsim
Authors: Yan Li Wen , Ai Cun Jin , Xie Hui
Published: April 2014

This paper presents a new MW wind turbine yaw hydraulic system,and describes the working principle of the hydraulic system,derives kinetic equations of the electromagnetic proportional valve and the motor in the hydraulic circuit,uses AMEsim to establish a simulation model of the electromagnetic proportional valve control motor hydraulic system,sets parameters of main elements of the model,and simulates.given under the input current signal action,derives yaw motor shaft speed and time graphics,and analysis.
Parallel Algorithms in a Physically-Based Hydrologic Soil Model
Authors: Du Yan Liang , Wang Shi Yan , Yin Shu Hua , Mao Zhan Po , Yang Su Zhen
Published: April 2014

Enormous river basin information has been collected by for high resolution of the physically-based distributed hydrological model, while the scales of computational domain are often restricted by the intensive calculation. The parallel algorithms of physically-based regional hydrologic soil model (P-RHSM) in OpenGeoSys are brought forward in this paper. The object-oriented C++ programming in the model approaches the two objectives: one is data structure organizations including the spatial discretization of the computation domain with nodes density arrangement and solutions communication of temporal variables, the other is computational efficiency by parallel computing. The Message passing interface (MPI) communication is implemented in P-RHSM which is carried out on Linux supported symmetric multiprocessing computers. P-RHSM is applied to Heihe basin in the northwest China. The high-resolution results of temporal soil moisture content distribution, front movement and parallel performance is presented.
Research on the Key Technology to Guarantee the Quantity of Tobacco Production for Removing Dust by the Vibration Screen
Authors: Li Zhe Kun , Xu Yong Kang , Li Gang , Fan Yu Jin
Published: April 2014

In order to reduce the loss in production and guarantee the quality of tobacco, the mixed tobacco vibration screening technology was studied. It introduced a double-layer vibration sieve into the tobacco production of cigarette enterprise, realized two technical indicators that the screening efficiency is high and the false screening rate is low. Mixed tobacco screen effect is obvious, the dust content in cigarette fell down, the false screening rate decreased 62%, and the loss reduced 41%. It provides a very good reference for the research and application of vibration screening technology.
A Literature Review of Using Eye Tracking Technology in Fashion and Product Design
Authors: Zhang Jia Nan , Du Lei , Xie Yong , Zou Feng Yuan
Published: April 2014

Evaluation of fashion and product design has been one of the most prominent factors among designers and researchers. Unfortunately, they usually evaluate their design by self-report that is relatively subjective. Research using eye tracking technology has begun to lead a objective way in which where and when the participants look at. The present paper reviews some publications of eye tracking technology in fashion and product design, identifies directions for further research in this growing field.
A Constraint-Based Approach for Skilled Workforce Scheduling Problem
Authors: Li Yan , Xiao Zhi Run , Dou Wen Qing , Yang Ying
Published: April 2014

The Skilled Workforce Project Scheduling Problem (SWPSP) is a complex problem of task scheduling and resource assignment that comes up in the daily management of many company Service Centers. In this paper we present a constraint programming (CP) approach for the SWPSP. We extend the project scheduling literature by developing a project scheduling model that accounts for differing skills among workers. The computational results for the SWPSP show that the constraint programming approach increases the performance of the model solving processes. The results for the SWPSP is effective in solving the proposed problem.
Employees Training Project Design Based on ISPI Technology in Practice
Authors: Ni Hui Jun
Published: April 2014

New employees training project process Model was built to promote learning with ISPI performance Technology. Alternate using teaching and un-teaching techniques is effective to promote training performance.
Two-Phase Image Segmentation with Nonlocal Mean Filter and Kernel Evolutionary Clustering in Local Learning
Authors: Chen Bing , Yang Dong Dong , Lu Gang , Feng Hong Xiao
Published: April 2014

In this study, a novel two-phase image segmentation algorithm (TPIS) by using nonlocal mean filter and kernel evolutionary clustering in local learning is proposed. Currently, the difficulties for image segmentation lie in its vast pixels with overlapping characteristic and the noise in the different process of imaging. Here, we want to use nonlocal mean filter to remove different types of noise in the image, and then, two kernel clustering indices are designed in evolutionary optimization. Besides, the local learning strategy is designed using local coefficient of variation of each local pixels or image patch is employed to update the quality of the local segments. The new algorithm is used to solve different image segmentation tasks. The experimental results show that TPIS is competent for segmenting majority of the test images with high quality.
Attendance Machine for Teaching
Authors: Yang Yi Hui , Yuan Feng
Published: April 2014

On the basis of analysis of the named,Introduces the development of teaching process of roll machine, roll machine for teaching digital tube display random results, intuitive and clear, and good use effect.
Corner and Edge Detection of Image Based on an Annealed Chaotic Competitive Network
Authors: Qin Xue Bin , Wang Mei , Wang Pai , Liang Hui Zhen
Published: April 2014

In the computer vision, feature extraction is an important research orientation. Corner and edge detection is a basic technique for obtaining local feature in this image. In the paper, we propose a method that corner and edge of image is detected simultaneously by an annealed chaotic competitive network. The method is compared with several traditional methods of corner and edge detection algorithm, the experiment result shows a good performance. The clustering method can achieve the corner and edge detection simultaneously.
Image Haze Removal Based Dark Channel Prior
Authors: Lin Bai Lin
Published: April 2014

This paper describes the image based on dark channel prior to fog. Dark colors from the statistical laws of outdoor priori no fog image database, it was such a key observation was based on the fact that - the vast majority of each local area outdoor image without fog are present strength of certain of at least one color channel low value pixels. Using this model building, directly estimate the concentration of fog and mist removal recover high quality interference image. Experiments show that the dark channel prior to remove the image haze becomes simple and effective.
Research of Multi-Channel Audio Data Acquisition System Based on FPGA and ARM
Authors: Ren Hui , Zhang Hua Bing , Zheng Cheng Lin , Nan Jie
Published: April 2014

This paper designed a multiple channel audio acquisition system based on FPGA and ARM. On the one hand, the system uses FPGA as the core, realize high speed logic control and the AD interface control unit. On the other hand, the ARM is responsible for the logic control and the realization of the HumanMachine Interaction, and to save the audio data to the SD card. The system has the advanced of low power consumption, real-time and high scalability. Therefore, we can implement the reliable and lower cost acquisition system of multi-channel audio signal.
Study on Network Video Monitoring System for Industrial Field
Authors: Wang Zhu , Liu Miao Miao
Published: April 2014

This paper introduces the IP network video monitoring system for monitoring and management of industrial field. All the signals in this monitoring system are transmitted through the network, without additional wiring. It not only can transmit images, alarm information, also the focus of a number of functions, such as remote monitoring, video playback, query system settings and user management. The system overall design principle, structural design, functional requirements, the main function module design are described. Through the monitoring system, managers can whenever and wherever real-time monitoring equipment working state, remote access management, provide a full range of decision support for production.
Detection Resolution Analysis of Scanning Acoustic Microscopy Used in Electronic Packaging
Authors: Guo Xiang Hui , Xu Chun Guang , Yang Liu , Peng Kai
Published: April 2014

Scanning Acoustic Microscopy (SAM) has been a powerful non-destructive testing tool used in electronic packaging and material characterization. With the development of 3D electronic packaging, internal dimensions of electronic packaging are getting more and more smaller, and the detection accuracy of existing non-destructive testing technology is far behind the requirements of manufacturing technology. In this study, a set of practical SAM system was developed independently by our Lab. And its detection resolution was analyzed using high frequency focused transducers with center frequency ranging from 20 MHz to 100MHz. The experimental results show that the lateral resolution of the ultrasonic transducer with 100MHz central frequency can reach about 40 microns, which is consistent with calculated resolution. Comparing with Sparrow criteria, Rayleigh criteria is more coherent with the experimental results.
Development of Automobile Gear Motion Error Detection System
Authors: Yu Lei , Wang Hua , Han Li Qiang
Published: April 2014

Dynamic precision measurement of transmission error involves many subjects such as optical, mechanical and electrical and computer at the forefront of technology has very important significance in the production. In order to achieve the accurate testing of motion error automobile gear, convenient and quick to obtain the gear tooth form error parameters, this paper research and design of the automobile gear error motion detection based on virtual instrument technology system, can accurately test automation, including visual inspection process, real-time detection information, read the data measured parameters, the analysis of characteristic curve, and other functions.
Spring Geometric Parameters of Non-Contact Measurement Based on Binocular Stereo Vision Sensor
Authors: Zhao Yan Ling
Published: April 2014

This paper first discusses the basic principles of binocular stereo vision inspection, followed by discussion of the three-dimensional mathematical model of binocular vision sensor measurements, non-contact measurement accuracy binocular stereo vision again spring geometric parameters were analyzed, and then double-structure stereo vision sensor configurations were analyzed for binocular stereo vision to do a simple discussion of the basis for discussion.
A Method of Multi-Antenna Signal Time-Delay Alignment Algorithm for Cyclostationary Signals
Authors: Yao Xiang Wen , Hu Yun Peng , Shen Zhi Xiang , Shen Cai Yao
Published: April 2014

In the signal combining system of deep space network, the estimation error of time-delay between signals will reduce the effectiveness. The time-delay alignment technique based on combined output signal as the reference (CC-SUMPLE algorithm) makes use of the mutual information offered by multi-antenna and improves the alignment performance. However, it only takes ordinary cross-correlation into consideration rather than the cyclostationary of digital communication signal during calculating time-delay in the iterative process. As to this problem, this paper proposes multi-antenna signal time-delay alignment algorithm based on cyclostationary of communication signal (MCCC-SUMPLE algorithm) which reconstructs the combined reference signal and takes advantage of multi-cycle frequencies. The simulation results show that the proposed algorithm will improve the estimation accuracy and time-delay alignment performance compared with CC-SUMPLE algorithm.
High Speed Small Target Frequency Multiplication Detection System
Authors: Lv Qiong Ying , Quan Ya Zhou , Zhang Dan Dan
Published: April 2014

This paper designed a high speed small target frequency multiplication detection system based on laser scanner LMS511. Use a mirror reasonable structure layout to achieve the frequency multiplication of a certain distance scanning area scanning frequency, to improve the detection probability of the high speed moving target. Through Labview human-computer interaction interface to control laser scanner, as well as the signal feature extraction, the strobe and date storage, to achieve the real-time detection and show of the moving target.
A Practical Method of Observer Velocity Optimization with Airborne ESM Sensor
Authors: Quan Hong Wei , Li Wan Bing , Peng Dong Liang
Published: April 2014

In bearings-only target motion analysis, the observer trajectory has an important effect on the accuracy of target localization and tracking. This paper presented a practical method of observer velocity optimization based on Monte-Carlo run for airborne ESM measurement system. For verifying the validity of our method, the geometric dilution of precision (GDOP) is taken as the performance index. Finally, three scenarios are given and the GDOP values of the ESM measurement system in scenarios are calculated to illustrate the observer velocity optimization strategy.
Formation Track Association Algorithm in the Presence of Sensor Bias Based on Double Fuzzy Topology
Authors: Dong Kai , Wang Hai Peng , Liu Yu
Published: April 2014

Aiming to solve the track association problem of the formation targets in the presence of sensor bias, a formation track association algorithm based on double fuzzy topology (DFT-FTA) is proposed according to the topology characteristics of the formation tracks. The formations are identified among sensors tracks based on the circulatory threshold model firstly. Then the formation tracks are replaced by their center track so that the first fuzzy topology model is established to realize preparatory association of formation tracks and common tracks. At last, the second fuzzy topology model based on the associated formation tracks and associated common tracks is established to realize formation inner track association. The simulation result shows that the proposed algorithm outperforms the fuzzy track alignment-association algorithm based on target invariable information (TII-FTA) and modified weight track association algorithm (MW-TA).
Tire Pressure Monitoring System and Wireless Passive Surface Acoustic Wave Sensor
Authors: Wang Wei Na , Fan Qing
Published: April 2014

The TPMS can not only save fuel and protect the tire, but also make the driver more safety. Tire safety is attracting the driver's attention, the United States had developed laws to enforce the TPMS installation in the car and the deadline is in 2008. In this paper, the basic structure and the implement method of TPMS are introduced. The active sensors are already used in most of the TPMS applications. The SAW theory and some wireless passive SAW pressure and temperature sensors which suit for the TPMS application are illustrated, because the passive sensor is becoming the focus in the TPMS research field. Passive SAW sensor is the good choice for TPMS, according to its wireless, passive, zero age rate, small size etc. The wireless passive SAW TPMS is one of the most important research direction. In this paper, some kinds of passive SAW sensor are introduced, which are used in TPMS.
Extrinsic Calibration of Camera and Rotating LIDAR Using Two Planes
Authors: Kim Dong Whan , Ha Jong Eun
Published: April 2014

Light detection and ranging (LIDAR) sensors are widely used in robotics. In this paper, we deal with the extrinsic calibration between camera and rotating LIDAR. It is necessary to fuse information of each system into one common coordinate system. LIDAR sensors give dense and accurate depth information than stereo system. But, camera can give more diverse information including brightness distribution and color about scene. We present extrinsic calibration algorithm using two planes where they are configured vertically compared to each other. A LIDAR is rotated using a motor to have full 3D information about the calibration structure. We find the extrinsic parameter of LIDAR with respect to the world on vertical plane using 3D information. Extrinsic parameter of camera with respect to the world can be found using traditional calibration algorithm. Finally, we can compute the extrinsic parameter between camera and LIDAR. Experimental results show the feasibility of presented algorithm.
Effects of Grating Slant Angle on Surface Plasmon Resonance and its Applications for Sensors
Authors: Xiong Xue Hui , Zhan La Min , Ke Xuan
Published: April 2014

In this study, we emphasized on effects of grating slant angle of tilted dielectric gratings (TG) on surface plasmon resonance (SPR). The momentum conservation for an optical wave exciting an SPR via TG is different from unslant gratings. The coupling condition induces the period along the grating surface (in the direction x) be decided not only by grating period but also by slant angle. The results calculated by rigorous coupled-wave analysis theory (RCWA) indicate that the resonant wavelength and the refractive index sensitivity are strongly dependent on the period in the direction x (noted Λx). And the refractive index sensitivity increases with the rise of the period Λx. The SPR sensor through TG offers high sensitivity about 800nm per refractive index unit and narrow full-width at half maximum (FWHM) about 5nm when monitoring biochemical liquid solutions.
A Temperature Transmitter with Autonomous Reconfiguring Function
Authors: Yang Zhi , Zhao Yi Xin , Liu Jing , Wu Xiao Jun
Published: April 2014

In this paper, according to several common temperature sensors in the industrial field a temperature transmitter based on the reconfigurable field programmable gate array (FPGA) has been designed to ensure that a single device which can meet the requirements of the various applications. The transmitter can quickly and automatically identify the sensor type (ST) and connection type (CT) of external temperature sensor (ETS). It then can automatically search the reconfiguration scheme by reconfiguration identification and reconfiguration planning. The transmitter also reconfigures its inner structure by auto-deployment. Therefore, acquisition and processing the temperature with different ST and CT can be realized. In addition, a physical prototype is developed, and the effectiveness of the temperature transmitter with autonomous reconfiguring function (TTARF) is verified in the resistance temperature detector (RTD) application. The whole reconfiguration process is fully automated without human intervention.
Adjustable Frequency and Amplitude Wave Generator
Authors: Sui Shou Gang , Wang Tao , Lu Shou Yin
Published: April 2014

In this paper the design of the waveform generator is introduced, and its frequency and amplitude is adjustable. Using the most commonly used 89C51 microcontroller, AD conversion chip ADC0809 and DDS chip AD9850, the generator can produce more accurate wave signal, and can realize the analog regulator of the frequency and amplitude.
Computer Forensics Based on Data Mining
Authors: Zhang Guan Zhu
Published: April 2014

This essay introduces the concept, principle and step of computer dynamic forensics, then proposed a computer dynamic forensics system model, and aims at the question which the computer dynamic forensics faces in the data analysis stage, the data mining technology applies to magnanimous data analysis in the computer dynamic forensics, it can effectively enhancement the data analysis speed, the analysis accuracy and the analysis intelligence, solute dynamic forensics usability, the validity, compatibility and extended question.
Data Mining Research Based on Analysis of the Chinese-Foreign Cooperation in Running Schools
Authors: Zhu Jie Zhong , Yuan Cheng Sheng , Guo Ping , Placide Uwonkunda
Published: April 2014

Chinese-foreign cooperation in running schools is an important way to promote education reform and development in our country. In this paper, we use the K-Means clustering in data mining method to analyze the data, and data warehouse and the acquisition of knowledge, analyzing the development of sino-foreign cooperation in running schools in China. This article first to 1452 papers in CNKI knowledge base, data warehouse is generated, using the K-Means type algorithm and similarity algorithm, development trend of Chinese-foreign cooperation in running schools, Chinese-foreign cooperation in running schools national distribution, sino-foreign cooperation in running schools, Chinese-foreign cooperation in running schools in domestic distribution of the four aspects are analyzed.
Optimization of Lymphoma Classification Using Dimensional Reduction
Authors: Weng Gui Rong , Yin Fei
Published: April 2014

Common gene data usually have the larger number of variablesp(genes) than the numbers of samplesN, which makes it difficult to do the classification by standard statistical methods. In this paper, the original datas dimension was reduced from the highp-dimensional gene space to a lowerk-dimensional gene space, and then would be classified by SVM (Support Vector Machine). Several methods were used for dimensional reduction, such as PCA (Principle Component Analysis), MDS (Multi-Dimensional Scaling). The experiments showed that classification accuracy had been improved after the original datas dimension being reduced to a specific number
An Improved Binary Relevance Algorithm for Multi-Label Classification
Authors: Guo Tao , Li Gui Yang
Published: April 2014

Multi-label classification (MLC) is a machine learning task aiming to predict multiple labels for a given instance. The widely known binary relevance (BR) learns one classifier for each label without considering the correlation among labels. In this paper, an improved binary relevance algorithm (IBRAM) is proposed. This algorithm is derived form binary relevance method. It sets two layers to decompose the multi-label classification problem into L independent binary classification problems respectively. In the first layer, binary classifier is built one for each label. In the second layer, the label information from the first layer is fully used to help to generate final predicting by consider the correlation among labels. Experiments on benchmark datasets validate the effectiveness of proposed approach against other well-established methods.
Spectrum Prediction for Cognitive Radio System Based on Optimally Pruned Extreme Learning Machine
Authors: Yang Ling , Lv Na , Xu Zhen Xing
Published: April 2014

The Cognitive Radio (CR) technology is an efficient solution to spectrum scarcity by share the spectrum with the secondary users on a non-interfering basis. The spectrum prediction can rationalize the spectrum allocation based on previous information about the spectrum evolution in time. Against previous spectrum prediction algorithm lack of timeliness and accuracy, this paper proposes a novel approach for spectrum prediction based on Optimally Pruned Extreme Learning Machine (OP-ELM) which improved the original Extreme Learning Machine (ELM) algorithm. This method not only takes the advantage of the ELM extremely fast speed and good precision, but also more robust and generic with additional steps compared with ELM. In order to compare its comprehensive properties to other algorithms, some experiments were designed. The results show that the predictive performance of this new algorithm is more satisfaction than others in spectrum prediction problem.
Research of Early-Warning Expert System for Security of Grain Storage Based on Uncertain Inference
Authors: Xiang Yun Qiang , Zhang Qing Hui , Han Peng , Chen Min Ya
Published: April 2014

To improve the technical level of grain storage, the knowledge and experience of grain storage，computer and artificial intelligence technology are used to research and develop the early-warning expert system of grain storage security. Furthermore，database，artificial intelligence，management information and decision support system as well as computer and information integration technology are applied to grain storage field. In general, this system is contributed to the intelligence and automation of grain storage management. What’s more, it can maximum be used to reduce the loss rate of the grain in storage process to ensure food security of the country.
Research of In-Car Navigation Based on Improved Ant Colony Algorithm
Authors: Ding Fang , Wu Su Zhuo
Published: April 2014

Determining how to select path efficiently in complex transportation networks was one of the main problems in-car navigation systems. For the drawbacks of slow convergence and easy to fall into local optimal solution of basic ant colony algorithm in solving the optimal path problem, a method of improving the expect-heuristic function is proposed in this paper, which enhances search direction and improves the convergence rate. Meanwhile, with the introduction of a new strategy to update the pheromone on ant colony system, the contradiction that convergence speed brings stagnation is balanced. The results show that the improved ant colony algorithm is easier to get the optimal solution compared with basic ant colony algorithm, and the convergence speed is faster, having a good navigation effect.
Forecast of Short-Term Wind Power Based on GA Optimized Elman Neural Network
Authors: Chen Ye
Published: April 2014

Due to the features of being fluctuant, intermittent, and stochastic of wind power, interconnection of large capacity wind farms with the power grid will bring about impact on the safety and stability of power systems. Based on the real-time wind power data, wind power prediction model using Elman neural network is proposed. At the same time in order to overcome the disadvantages of the Elman neural network for easily fall into local minimum and slow convergence speed, this paper put forward using the GA algorithm to optimize the weight and threshold of Elman neural network. Through the analysis of the measured data of one wind farm, shows that the forecasting method can improve the accuracy of the wind power prediction, so it has great practical value.
The Research of the Optimization Model of Flight Scheduling Based on Filtered Beam Search
Authors: Lian Ya Long , Jiang Xiu Shan , Xie Tian Rong
Published: April 2014

According to the characteristics of the optimization theory and arrival flights.Established static and dynamic model which take the aircraft delay cost as target. The limit of maximum allowable delay time variable are introduced to reduce the delay cost, take into account fairness of flights landing at the same time. The solution of the model is filtered beam search algorithm (FBS).
A Novel Change-Point Detection Approach for Monitoring High-Dimensional Traffics in Distributed Systems
Authors: Zhao Li , Liu Qian , Du Peng , Fu Ge , Cao Wei
Published: April 2014

Change-point detection is the problem of finding abrupt changes in time-series. However, the meaningful changes are usually difficult to identify from the original massive traffics, due to high dimension and strong periodicity. In this paper, we propose a novel change-point detection approach, which simultaneously detects change points from all dimensions of the traffics with three steps. We first reduce the dimensions by the classical Principal Component Analysis (PCA), then we apply an extended time-series segmentation method to detect the nontrivial change times, finally we identify the responsible applications for the changes by F-test. We demonstrate through experiments on datasets collected from four distributed systems with 44 applications that the proposed approach can effectively detect the nontrivial change points from the multivariate and periodical traffics. Our approach is more appropriate for mining the nontrivial changes in traffic data comparing with other clustering methods, such as center-based Kmeans and density-based DBSCAN.