bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of a K Band MEMS Switch with CPW Defected Ground Structure
Authors: Deng Zhong Liang , Chen Cai Hu , Fan Sen , Gong Hua , Sun Xiao Fei
Published: September 2013

This paper presents a K band (18GHz-26.5GHz) shunt capacitive micro-electromechanical systems (MEMS) switch. This switch used the coplanar waveguide (CPW) Defected ground structure (DGS) which is made by etching defect structure in CPW ground line. Furthermore the beam structure of the proposed switch is composed of one girder and two supporting beams. The design of the switchs structure is benefit to the apart between the DC signal and AC signal. The simulated values of the isolation of the switch on off-states is-55 dB at18.9 GHz, and the return loss at K band is greater than-0.3 dB. The pull-in voltage of the switch is 13.3 V.
The Optimization of Power Smoothing Control Strategy for Wind Farm Based on Flywheel Energy Storage Device
Authors: Huang Yu , Yuan Yu Hao , Zhang Guang Ming
Published: September 2013

The instability and intermittency of wind makes the output power of the wind turbine randomness and volatility. Due to its fast pulse response and high charge-discharge rate, the flywheel energy storage can effectively reduce the power fluctuations caused by the wind farm. This article optimized the control strategy for the permanent magnet synchronous motor (PMSM) based flywheel energy storage system to reduce the active power fluctuations. Fuzzy inference method is used to make the desired smoothing active power value more precise. The rotor flux oriented vector control strategy with improved proportional resonant controller (PR controller) is proposed based on the mathematical model of PMSM to improve the robustness of the system in current control.
Optimization Design of Dryer Machinery in Tunnel Washing System
Authors: Wang Xiao Rong , Li, Wei Hua , Pan Bao Jun , Su Shi Jie , Gao Chao , Tang Wen Xian
Published: September 2013

The energy saving is the important principle of the future development of our country, reasonable and efficient use of resources in the industrial production has become increasingly concerned topic. This paper studies the industrial dryers in the washing system, through the analysis of flow field simulation, points out the existing dryers in the working process of the structure is unreasonable, inadequate energy utilization, etc. Based on flow field simulation, the internal structure optimization design of the dryer, the optimized flow field structure is more reasonable, dryer air in the dryer average velocity increased, thus improve the drying efficiency and energy saving.
Design of GTAW Wire Feeder Control System Based on Nios II
Authors: Yang Fu , Zhang Shu , Zhang Wen Ming
Published: September 2013

Based on Nios II embedded processor control module, a digital control system was designed for wire feeding control of gas tungsten arc welding(GTAW). In the control system FPGA wave module is used to control the movement of the DC servo motor, and the digital control of pulsed wire feeder for GTAW was achieved. One and the same control module with Nios II embedded processor is used to control the wire feeder and the welding power source. Thus, the current parameter of pulsed welding arc can be obtained and used directly for controlling the speed of wire feeding. At last, the experiment results are provided to verify the validity.
A Dynamic Trust Evaluation Model for Internet Computing
Authors: Li Feng , Si Ya Li
Published: September 2013

Trust mechanism has been identified as one of key areas in the field of Internet security. Our objective in this paper is to develop a dynamic trust evaluation model for Internet computing. The proposed scheme divides the recommendation trust into the direct recommendation trust and the indirect recommendation trust, and considers variety of factors to calculate the two types of recommendation trust degree. Simulation results show that, compared to the existing trust model, the model can effectively improve the accuracy of trust evaluation, and provide a better capacity of resisting malicious entities.
A Dynamic Cell Range Expansion for LTE-Advanced Heterogeneous Networks
Authors: Dai Meng Fan , Song Qing Yang , Ning Zhao Long
Published: September 2013

Deploying Pico cell Base Station (PBS) throughout a Macro cell layout is a promising solution to enhance system capacity and users throughput. However, the strong received power from Macro cell Base Station (MBS) makes the Pico cell areas narrow and limits cell splitting gain. Range Expansion (RE) is desirable to balance the network load between MBS and PBS by expanding the coverage, which subsequently increases cell splitting gains. However, more interference may be introduced if the bias value of RE is not set properly. In this paper, we propose a Dynamic Cell Range Expansion (DCRE) strategy that the bias value of RE is set dynamically according to the change of network environment. The proposed scheme aims to fulfill the resources utilization by RE scheme, and meanwhile improve the users performance of cell edge through cell load balancing method. Simulation results show that DCRE scheme can improve the network performance of cell edge, and increase the cell capacity and users throughput compared with the existing methods.
Performance Analysis of Uniform Fiber Bragg Grating
Authors: Wang Li Li , Qiu Xiang Yan , Ma Qiu Ming
Published: September 2013

In this paper the fundamental characteristics of fiber Bragg grating was described. The important parameters such as the length of fiber gratinggrating periodwhich strongly affected the characteristics of fiber Bragg grating were analyzed.
Traffic Prediction Based on Grey Model Optimized by Buffer Operator and PSO in Communication Network for Electric Power
Authors: Wu Run Ze , He Ying , Tang Liang Rui
Published: September 2013

To meet the requirements of planning and to improve accuracy and stability of traffic prediction model in the communication network for electric power, a traffic prediction method based on grey model optimized by buffer operator and particle swarm optimization (PSO) is proposed in this paper. Variable weights buffer operators are implemented for preprocessing traffic data to enhance the adaptability of gray prediction model. Taking the maximum grey correlation degree between prediction series and true series as objective function, based on the search ability of PSO, the fitness function is founded, which can determine the optimal parameters of gray model. Applying the improved model to traffic prediction in communication network for electric power, a new prediction result is drawn. The prediction result shows that the improved model has higher prediction accuracy compared with the traditional GM (1, N) model.
Cryptanalysis and Improvement of a Strong Designated-Verifier Proxy Signature Scheme
Authors: Yang Li Guo , Ou Fu Na , Zhao Jing
Published: September 2013

By cryptanalysis of a strong designated-verifier proxy signature scheme, it is found that this scheme has security leaks: original signer can forge the proxy signers valid proxy signature for any message; not only the designated-verifier but also proxy signer can verify the signature and proxy signer can misuse it. An improvement is given, and the security analysis shows that it can resist the spiteful forgery attacks by original signer and prevent the misuse of proxy signature by proxy signer.
The Discussion on Communication Simulation Methods
Authors: Pei Hong Wen , Pan Jie , Pei Zheng , Xu Meng
Published: September 2013

With the rapid development of modern communication, more and more new communication systems are invented. In this treatise, the author mainly describes the significance of computer simulation in the field of communication system modeling, analyzes the technologies and principles of communication system simulation, and summaries basic methods and general technologies for communication system simulation and model construction.
FPGA Implementation of a Novel Multi-Rate QC-LDPC Encoder for DTMB Standard
Authors: Wang Fei , Zhang Peng , Liu Chang Yin
Published: September 2013

A serial-input serial-output encoder based on pipelined type I rotate-left-accumulator (RLA) circuit is presented for multi-rate Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) codes of Digital Terrestrial Multimedia Broadcasting (DTMB) standard. This encoding scheme can reduce the power consumption and save memory resource. FPGA implementation and simulation results show that the design meets the requirement of DTMB standard and simplifies the structure of the memory.
Investigations of Energy Separation Effect in Vortex Tube for Natural Gases
Authors: Wang Wen Chuan , Fang Xiang Jun , Liu Shi Long , Sun Wen Long
Published: September 2013

This paper aims to investigate fixed composition natural gases including N2, CH4 and C2H4 energy separation effect in vortex tube. Energy separation phenomena of those gases were investigated by means of three-dimensional Computational Fluid Dynamics (CFD) method. Flow fields of natural gases in fixed inlet boundary conditions were simulated. The results main factors were found that affect the energy separation with cold mass fraction being 0.7 and pressure drop ratio being 3.90. At the same time, this paper has illustrated the effects and tendencies of energy separation with gases in the tube under the same cold mass flow fraction and cold pressure ratio. The results show mixture gases total temperature difference effect is unchanged varied with the cold mass fraction; CH4% has no effect on the vortex cold end temperature separation, but varied of CH4% has an influence in total temperature and hot end separation effect; total temperature separation effect of CH4% was divided into two sections, one is0%-80%, and the other 80%-100%.
The Design of MMS and SMS Student Service System Based on PC
Authors: Li Guo Xin
Published: September 2013

In recent years, as the GAO KAO student numbers in China have been going down, and the size of the undergraduate school enrollment has been increasing. The enrollment of professional colleges are facing a lot of pressure and challenge. This article proposes and designs the Student Service System. Its main purpose is, by using MMS and SMS, for those students who have made the inquiries and inclined to apply for the school, to provide personalized guidance and service during the application process, and to increase the chance of being accepted by the school. The application of this system will increase the application rate and registration rate. And at the same time, it will improve the school's publicity and reputation. Therefore, it fulfills its purpose.
The Research and Application of Simulation Learning Tool
Authors: Tian An Hong , Fu Cheng Biao , Cui Li Mei
Published: September 2013

Computer network is popular in colleges for undergraduate students, which is focusing on practice and demands the students to grasp the configuration for different kinds of network devices, but network laboratory is not established completely in colleges due to the high cost of network devices .The article put forwards a solution based on virtualization tool named Packet Tracer, which provides network simulation, visualization and collaboration capabilities. This paper presents the features of the virtual simulation tool, and the configuration example for mini VLAN practice project, this method can help students to understand and master the complex and abstract network concepts.
Software Framework for Advanced Error Troubleshooting in Flexible Manufacturing System
Authors: Csokmai Lehel , Moldovan Ovidiu , Tarca Ioan Constantin , Tarca Radu
Published: September 2013

This paper introduces a new type of software framework for error troubleshooting in flexible manufacturing systems using a frame marker device. Our framework system meant to resolve the failures originated from the human-machine interface and to generate self-training from previous experience.
Gear Incipient Diagnosing Based on EEMD and Genetic-Support Vector Machine
Authors: Xiao Cheng Yong , Shi Bo Qiang , Hao Zhi Jun , Zhu Shuang Ming
Published: September 2013

Due to the incipient fault attributes of gear are not obvious, So a hybrid diagnosis model to gear diagnosing based on Ensemble Empirical Mode Decomposition (EEMD) and Genetic-Support Vector Machine (GSVM) was proposed. With the method of EEMD,the gear vibration signals are adaptively decomposed into a finite number of Intrinsic Mode Function (IMF),which can alleviate model mixing that may appear in conventional EMD method. It calculates the energy character vectors of every IMF components,energy feature extracted from a number of IMFs that contained the most dominant fault information could serve as input genetic-vectors of support vector machine. The proposed model is applied to the gear testing system, and the results show that the diagnosis approach was effectively.
Optimization on the Structure of Ceramic Nozzles by FLUENT Simulation
Authors: Ding Ming Wei , Fu Chang Jing , Yin Si Bei
Published: September 2013

Based on the theory of gas-solid two-phase flow, abrasive flows in ceramic nozzles with different structures are simulated by FLUENT software and the outflow velocity of particles is compared. The results show: the abrasive outflow velocity of ceramic nozzle with cone angle is large than that of ceramic nozzle with through-hole structure, and the distribution of abrasive particles is more uniform for the ceramic nozzle with cone angle. The best entrance cone angle of ceramic nozzle is 10o30o, and the maximum abrasive outflow velocity of the ceramic nozzle with cone angle of 20o is 90.16 m/s. The simulation results have a good agreement with the experimental results.
A Data Recorder with Optimized Recording Algorithm Used in UAV
Authors: Gao Si Yuan
Published: September 2013

This paper presents a data recorder used in UAV. The data recorder is implemented base on an embedded platform which is composed of a microcontroller and a compact flash controller. The recorder employs an optimized recording algorithm for rapid storage. The algorithm is able to set the number of sectors to be written dynamically according to the data throughput in order to minimize the response time of the compact flash controller. The recorder has a multi-area scheme to achieve a real-time storage without overwriting which could be applied to aircraft where the parameters should be record in time for analysis after experimentation.
Method to Estimate and Promote SNR of Covariance Matrix in Array Signal Processing
Authors: Shi Yi Ran , Tian Yan Tao , Shi Hong Wei , Zhu Lan Xiang
Published: September 2013

Estimation for direction of arrival (DOA) is an important work in array signal processing, and subspace method such as MUSIC algorithm is basic and important in DOA estimation. This paper analyzes the structure of eigen value of variance matrix, and proposes a method to estimate the signal noise ratio (SNR) of the data received by sensor array. With the accurate estimation for SNR, we can estimate the work environment and decide detect threshold for many algorithm. The paper also proposes a method to promote the SNR of covariance matrix with moving the covariance slice to do DOA estimation. It can efficiently widen the difference of signal eigen value and noise eigen value.
Underwater Image Transition Region Extraction and Segmentation Based on SVM
Authors: Chen Cong Ping , Zou Lei , Wang Wei
Published: September 2013

By analyzing the gray level features of transition region, a new underwater image transition region extraction method based on Support Vector Machine (SVM) is presented. At first, a vector is constructed to fully describe the transition region, which includes local complexity, local difference and neighborhood homogeneity. Then, SVM is applied to train and classify the set of feature vectors, so that the transition region of the underwater image is extracted. Finally, the segmentation threshold is determined by mean of the histogram of the transition region, and the binary result was yielded. The experimental results show that the proposed algorithm can achieve a better transition region extraction and segmentation performance, and automatically select the optimal threshold for transition region extraction.
Research on Data Processing Method for Continuously-Varying Dynamic Pressure Flutter Test
Authors: Guo Hong Tao , Lv Bin Bin , Yu Li , Yan Yu , Kou Xi Ping
Published: September 2013

For the continuously-varying dynamic pressure flutter test data in the high-speed wind tunnel; this paper analyzes the strengths and weaknesses of the data Processing Method in this field. The data selection and stacking mode is improved. A Butterworth IIR digital filter is used for digital filtering. The power spectral density function is computed by Fourier transform of the autocorrelation function. A pick-hold method is used to predict the flutter critical point. It is indicated that our method features high accuracy and efficiency by theoretical analysis and wind tunnel flutter test.
The Hinge Moment Optimization of Rudder Base on CFD Numerical Simulation
Authors: Zhang Nan , Zhang Yue
Published: September 2013

The paper introduce structured grid division, use CFD numerical simulation and FLUNET software to conduct the simulation calculation for the hinge moment of rudder. To illustrate the problem, we select two unused plane airfoil An axis-symmetric rudder, one for the special design of the plane rudder. Calculated at 0.4 ~ 1.8Ma, different rudder angle, angle of attack different hinge moment value, and compare them ultimately come to a flat airfoil optimization program, making the steering hinge moment to meet the indicators proposed.
Image Acquisition Method Based on TMS320DM642
Authors: Liu Li , Wu Qing Hong
Published: September 2013

A method of the image acquisition based on digital signal processor (DSP) is introduced. DSP, complex programmable logic device (CPLD) and contact image sensor (CIS) are combined in the hardware design, and the time-sequence analysis of the image acquisition process is also presented. Practical application indicates that this method has high accuracy and is rapid enough to satisfy the requirement of real-time acquisition.
Effects of Parameters Variation of Fractal Flow Path on the Emitter Hydraulic Performance with Path Analysis
Authors: Song Peng , Yang Pei Ling , Xu Fei Peng , Zhou Chun Fa
Published: September 2013

Flow path is one of the key components of drip irrigation emitter. Four factors of fractal flow path section area, length, tooth highness and tooth number are interosculated nearly each other, and the influencing process of flow path to hydraulic performance parameters was analyzed with path analysis. The section area and length of the flow path were the main factor affecting on the flow exponent and flow coefficient of drip irrigation emitter, and other ones less. Reducing the section area could debase the emitter flow exponent, and reducing section area and increasing the length of fractal flow path could debase the flow coefficient.
An Overview of Moving Target Abnormity Behavior Identity Technology in Video Sequence
Authors: Song Yue Cong , Liu Bo , Li Min
Published: September 2013

Moving target abnormity behavior identity technology is the one key base of Intelligent Video Surveillance. Object detection technology, target tracking technology, target classification technology has reached full development at present. About abnormity behavior identity technology, there have three technologies: template matching techniques, state-space techniques, Semantics Description techniques. Research situation of these technologies is introduced in this paper, and orientation of technological development of these technologies is also introduced in this paper.
Speech Stream Detection for Noisy Environments Based on Empirical Mode Decomposition
Authors: Tang Qiang , Zhang De Xiang , Yan Qing
Published: September 2013

A new approach for speech stream detection based on empirical mode decomposition (EMD) under a noisy environment is proposed. Accurate speech stream detection proves to significantly improve speech recognition performance under noise. The proposed algorithm relies on the Teager energy and spectral entropy characteristics of the signal to determine whether an input frame is speech or non-speech. Firstly, the noise signals can be decomposed into different numbers of sub-signals called intrinsic mode functions (IMFs) with the EMD. Then, spectral entropy is used to extract the desired feature for noisy IMF components and Teager energy is used to non-noisy IMF components. Finally, in order to show the effectiveness of the proposed method, we present examples showing that the new measure is more effective than traditional measures. The experiments show that the proposed algorithm can suppress different noise types with different SNR.
Defective 2D Barcode Image Mosaic Method for Rotary Scanning Serial Image
Authors: Wang Jia Jing , Zhang Shu Sheng , He Wei Ping
Published: September 2013

A mosaic method of based on rotational scan sequence cylindrical barcode which is suitable for metal parts is put forward, which combined the hardware and the software. Firstly, extract the feature points of each serial image based on scale-interaction of Marr wavelets. Then, get the optimal match of feature points with improved image local entropy. Lastly, complete the natural splice of the defect 2D bar code images through the algorithm of three interpolation and multi-resolution spline. The experimental results show that the algorithm could extract the feature points of consistent relative position and quantity after the processes of rotation, brightness, blur and nose, at the same time, assure the splicing efficiency and measurement precision of image mosaic. The method can also better finish the defect bar code recovery caused by curvature deformation.
Image Pro-Correction for Defocus Blur Image Based on Wiener Filtering
Authors: Li Qiong , Tai Yong Hang , Chen Zai Qing , Yang Qiu Yue , Zhuo Bin
Published: September 2013

Image restoration is an important application of the digital image processing. Unlike traditional restoration algorithms that operate on a blurred image to recover the original, we propose a technique that the correction should be applied to the original image before blurring. To accomplish this, we approximate the Point-Spread-Function (PSF) of different defocus blur images by the circular disk. According to the estimated PSF, the original image is pro-processed based on Wiener filtering and High Dynamic Range (HDR) compression. Experiments results show that using this technique can help ameliorate the visual blur and the defocus images finally have a sharp vision.
A Signal Detection Method for Harmonic Signal Submerged in Complex Noise Background
Authors: Quan Ai Juan , Sun Xiao Dong , Zhu Lan Xiang
Published: September 2013

This paper presents a method to detect weak harmonic signal embedded in chaotic noise. Using different correlation characteristic of harmonic and chaotic signal ,we can transform the sample signal to a new data sequence which has new harmonic . The new harmonic frequency is m times of the original harmonic and beyond the center bandwidth of noise. Then use wavelet packet decomposition to analysis the energy distribution of harmonic and chaotic signals and extract the component which the harmonic energy concentrated on, In the end, a multiple signal classification (MUSIC) algorithm is employed to estimate harmonic frequencies . The method suit for the complex background noise (strong chaotic noise and gaussian noise).
Simulation Analysis Based on Finite-Difference Time-Domain Algorithm for GIS Partial Discharge Detection
Authors: Liu Qiu Ping , Wang Xu Hong
Published: September 2013

Gas insulated switchgear (GIS) has been widely used in global power grids currently. However, there are several disadvantages of GIS which will cause partial discharge (PD) in the insulation and then make GIS shut down. In this paper, the application of the ultra high frequency (UHF)method for partial discharge monitoring is discussed in detail, including the placement of the UHF sensors , detection system and the different characteristics of the different defects in the PD signals diagram are analyzed as well. Finally, some relevant conclusions are drawn based on Finite-Diffrenee Time-Domain algorithm (FDTD) for simulation of the electromagnetic waves by UHF PD detection technology.
A PAPR Reduction Method for Hexagonal Constellation-Based OFDM Signals
Authors: Zheng Jin Quan , Wang Ya Jun
Published: September 2013

One of the major drawbacks of orthogonal frequency division multiplexing (OFDM) signals is the high peak to average power ratio (PAPR) of the transmitted signal. In this paper, a new method based on hexagonal constellation is proposed to reduce PAPR and to eliminate side information for OFDM signals. In order to get better PAPR reduction performance, we propose a new PAPR reduction algorithm based on parametric minimum cross entropy (PMCE). Simulation results show that PMCE algorithm is an efficient method to achieve significant PAPR reduction.
A Dynamic Sliding Window Based on Otsu Method for Binary License Plate and Character Recognition
Authors: Jian Rui , Zhao Jun
Published: September 2013

This paper is concerned with the problem of license plate recognition of vehicles. A recognition algorithm based on dynamic sliding window to binarize license plate characters is proposed. While a connected domain approach is presented to cope with the degradation characters. There are three steps to recognize the characters. First, the characters are classified by their features. Then, based on such classification a grid method is used to construct the feature vector. Finally, least square support vector machine is employed to recognize these characters. The test results show the high recognition rate and also illustrate the effectiveness of the proposed algorithm.
Trademark Recognition Based on Hu Modified Invariant Moments
Authors: Huang Min , Ma Ya Qiong , Shu Hua Zhong , Gong Qiu Ping
Published: September 2013

Trademark represents the quality of the goods and the manufacturer's reputation, which is an important symbol of goods; automatic trademark recognition has a wide range of application prospects in many fields such as e-commerce, advertising and logistics transportation. In target recognition algorithm, the most critical is to extract the target feature. Because of the moment feature has better invariant characteristics; it is widely used in image feature extraction. In this paper we use Hu modified moments and the minimum distance classifier for trademark recognition, the experimental results show that the modified moments have higher recognition rate than the original Hu moments, this method can improve the recognition rate of the target image, it is conducive to trademark recognition.
Study on Flow Distribution Relationship in Hydraulic System
Authors: Zhang Jun , Fu Chun Bao , Tang Hong Mei , Li Xian Hua , Tang Cun Ren , Wang Wei
Published: September 2013

The dynamic measurement of the high pressure side flow in hydraulic system is still one of the important and difficult problems in hydraulic test technique. Based on the method of bypass flow measuring principle, the distribution relationship between main and branch pipe flow should to be solved in digital simulation, and the corresponding numerical analysis was carried out on the result data of analysis. From the results of numerical analysis, the flow distribution relationship between main and branch pipe were found, and the corresponding approximate numerical expressions were obtained.
Application of Weight Adjustment Technique in the Deep Web Data Source Classification
Authors: Zhou Xiao Qing , Sun Jia Xiu , Wang Shu Bin
Published: September 2013

The traditional search engine is unable to correct search for the magnanimous information in Deep Web hides. The Web database's classification is the key step which integrates with the Web database classification and retrieves. This article has proposed one kind of classification based on machine learning's web database. The experiment has indicated that after this taxonomic approach undergoes few sample training, it can achieve the very good classified effect, and along with training sample's increase, this classifier's performance maintains stable and the rate of accuracy and the recalling rate fluctuate in the very small scope.
Optimal Route Retrieval Model Based on Assignment Strategy
Authors: Zong Fang , Xiong Hai Ling
Published: September 2013

When travelers search for the traveling route, they usually take into account the number of transfers, transfer mode, trip distance, travelling time and cost and so on, so the elements such as multi-criteria and a various of traveling model and long distance can be considered in the inquery model. Therefore, the paper proposes a new searching model based on the directed network, the model not only has a good ability to satisfy the demands of multi-criteria for travellers through assignment strategy, but also can describe the transfer between the various means of transportation by setting vehicle speed. In the end, it verify the effectiveness and practicality of the model.
U Nong Shu Cai Tong System - The Agricultural Expert System Based on U Disk
Authors: Li Guang Da , Zhang Jun Feng , Zheng Huai Guo , Tan Cui Ping
Published: September 2013

Chinese rural areas’ Internet coverage is relatively low based on the investigation of Beijing suburbs. It will take a long time to achieve that Internet enters households of farmers. In response to this reality, the paper puts forward the new idea that use U disk to lead agricultural information resources into rural areas, so agricultural expert system based on U disk-U Nong Shu Cai Tong System is developed. It can effectively solve the problem of farmers' knowledge acquisition. The paper discusses the background, architecture, functions, system development’s difficulties and application of U Nong Shu Cai Tong System.
Early-Warning Model for TECC Based on Gray Neural Network - Taking Laolongtou Scenic Area as an Example
Authors: Yang Xiu Ping , Li Er Chao
Published: September 2013

Based on fuzzy inference and gray neural network, indexes of early-warning system of carrying capacity in scenic spots is established and extract fuzzy rules based on historical data, simulate the early-warning system based on fuzzy inference, gray forecasting model is built for single feature index respectively, add a compensated error based on neural network. The prediction value equals to the output value of grey neural network model plus the compensated error signal. At last, takes Laolongtou scenic area as an example.
Digital Earth and Exploration of Military Application
Authors: Wang Hong Wei , Yang Ming Quan , Sun Xiao Rui , Xie Jun
Published: September 2013

Digital Earth is the inevitable product which is developed with the global information technology and international military competition, it is of great significance in modern warfare and national defense construction. This paper describes the concept of Digital Earth and the environment construction of military application of Digital Earth. At last, this paper focuses on Digital Earth applications and application status in the military.
Detection for Approximately Duplicate Records Based on Fuzzy Comprehensive Evaluation
Authors: Zhou Li Juan , Xiao Zhe
Published: September 2013

To solve the problem of attribute weight determination in the approximately duplicate records, we put forward a method based on fuzzy comprehensive evaluation to get attribute weight in data set. We first perform an analysis of the composition factors of attribute. Then we carry out an evaluation of their rank. Finally, we make a determination of the attribute weight using the fuzzy comprehensive evaluation method, on the basis of which the approximately duplicate records are detected. Theoretical analysis and experimental results show that the method can objectively determine all attributes weight, and effectively detect the approximately duplicate records in massive data set.
Construction of Drought Indices from Passive Microwave Remote Sensing AMSR-E Data in Huaihe River Basin
Authors: Wang Rui , Xu Jing Wen , Wang Dan , Xie Xing Mei , Wang Peng
Published: September 2013

On the basis of previous work, this paper aims to build several proper drought indices based on passive microwave remote sensing AMSR-E data in Huaihe River Basin. Compared with measured soil moisture, optimal drought indices have been selected to explore the spatio-temporal variation of drought conditions. The results indicate that there are satisfactory negative correlations between MPDIs (Microwave Polarization Index) and observed soil moisture. Moreover, MPDIs calculated by bands of 69GHz and 187GHz are much closer to variation trend of soil moisture than those obtained by other bands.
Effect of Fracture Parameters on Desorption Properties of Shales
Authors: Fan Kun Kun , Sun Ren Yuan , Ma Zi Chao , Zhang Yun Fei , Wei Yan , Zhang Zhao Zhao
Published: September 2013

Horizontal well and hydraulic fracturing are the main technologies for shale gas development. The desorption properties of shales are very important data for shale gas development. In order to simulate the desorption process in shales with horizontal well and fractures, a new method for shale sample preparation and a new experimental system for the evaluation were developed. The effect of the number and half-length of fractures on the desorption rate and the desorption equilibrium time were measured when the system pressure drops from 9.2MPa to 7MPa. Experiments show that the initial desorption rate increases and the equilibrium time decreases with the increase of the number and half-length of fractures. Within the scope of the experiments, the number of fractures is more important than the half-length of fractures for the desorption rate.
Developing the Coal and Power Pool Project, Structuring Large-Scale Coal Enterprises
Authors: Song Mei , Zhang Cong
Published: September 2013

The coal and electric power are foundational energy industries in China, which are connected closely with each other. However there are contradictions and disputes between the two. To implement the coal and power pool project (CPPP) is an effective way to solve the problem. In accordance with the Twelfth Five-Year Plan, the coal industry will develop in large-scale, collectivized and modern direction. CPPP is one focus of the large modern coal enterprises’ steady construction, and makes much sense for coal enterprises, power companies and the overall energy situation in China. This article expounds the reasons, modes and significance of CPPP, and offers some relevant suggestions.
The Economics and Feasibility of Traceability in Agri-Food Supply Chain: Analysis with Game Theory between Double Oligarchs
Authors: Wu Jin Chao , Wu Chen Xi , Liu Yan Ping
Published: September 2013

Traceability is a useful approach to reduce information asymmetry and control food safety risks in agri-food supply chain. However at the present stage where development of traceability system in China is not mature, food processors have to take high investment of traceability and benefits into consideration in economic aspect. The paper builds a game-theoretic model to analyze the economic value and feasibility of traceability in agri-food supply chain. It is found that there may be different situations in which the game equilibrium outcomes between two processors are different. However, if the government intervenes, it is shown that government can take action to guide the game equilibrium to the result that both the processors will implement traceability voluntarily.
Study on the Intra-Ship Material Handling System
Authors: Li Feng , Han Duan Feng
Published: September 2013

The efficiency of intra-ship material handling system has a significant impact on naval ship operational effectiveness. Previous ship designs did not consider material handling systems very well. This paper focuses on material handling system as a man-machine-environment system, since material handling issues are global and complex. The methods of analysis and simulation are discussed, which are utilized for the operation process of material handling system. The optimization of operation process, transportation route and arrangement are then summarized. On this basis, the evaluation index system of material handling system is set up using Delphi method.
A Cross-Layer Congestion Control Algorithm Based on Traffic Prediction in Wireless Sensor Networks
Authors: Sun Yi , Li Min , Xu Peng
Published: September 2013

Congestion in wireless sensor networks can affect the networks performance seriously,not only it has impact on data transmission and the quality of service, but also wastes energy and shortens the network lifetime. Aiming at this issue, this paper proposed a cross-layer congestion control algorithm based on traffic prediction (CCATP), it can take congestion mitigation measures in advance according to the prediction result. CCATP comprises three mechanisms: (i) congestion prediction; (ii) local congestion control mechanism based on backoff time adjustment; (iii) transmission route selection based global congestion control mechanism; Simulation experiment results show that CCATP can reduce the packet loss number and improve the energy efficiency significantly, so as to effectively improve the service performance of network.
Research on the Feasibility of Express Freight Transport on High-Speed Railway in China
Authors: Zhang Yuan Ke , Qin Si Ping
Published: September 2013

The paper investigates the developing progress of express freight transport on high-speed railway at home and abroad. It is found that there are many successful cases for high-speed express freight transport products in foreign countries, suggesting the feasibility to carry out relevant services in China. Lack of advanced technology and effective operation management, the process of express freight transport on high-speed railway in China is postponed. After freight market demand analysis, the paper emphasizes on the infrastructures and running modes to analyze technical feasibility and on transport costs, efficiency and timeliness to analyze economic feasibility, ending with the conclusion that it is feasible for China to carry out express freight transport on high-speed railway, combined with some construction recommendations.
Research on Mining of E-Procurement Model Parameters Based on Decision Tree
Authors: Wu Ping , Huang Yun Fei , Cao Qian Qian , Xiong Feng
Published: September 2013

More and more enterprises adopt e-business for procurement. Varieties of procurement modes can be controlled by different parameters, and different business processes are generated by the combination of parameters, but numerous optional parameters will increase the difficulty of the customer's choice. In order to solve it, we will use the C4.5 algorithm to analyze a procurement mode parameters correlation with the bidding results, and mine parameters combinations that suit for certain type of materials to provide customers with recommended parameter selection guide. Thereby it generates the e-procurement process meeting customer demand, and provides a good bidding result.
The Entropy Weight Fuzzy Comprehensive Evaluation of Green Logistics Cost Management
Authors: Dong Hai , Wang Sheng Nv
Published: September 2013

For green logistics, entropy fuzzy analytic hierarchy process is applied to evaluate its cost management. Firstly, based on the theory of environment resources value, the composition of green logistics cost is put forward. Then, a green logistics costs management evaluation system is established. Based on the dynamic uncertainty of environment cost index, entropy fuzzy analytic hierarchy process is applied to evaluate it. Finally, the entropy weight fuzzy analytic hierarchy process is reasonable and effective for green logistics cost management by numerical examples.
Open Experimental Teaching in Fluid Mechanics
Authors: Zheng Bin , Liu Yong Qi , Liu Rui Xiang , Meng Jian , Mao Ming Ming
Published: September 2013

Cultivating innovative talents is an important task of colleges and universities. It is the trend of higher education development and the need of social development. Experimental teaching is an important link to develop students practice ability as well as innovative ability. The open experimental teaching is an effective way to train innovative talents. The content, conduct, effect and significance of open experimental teaching were studied in fluid mechanics.
Dynamic Modeling and Motion Simulation for Wave Glider
Authors: Qi Zhan Feng , Liu Wen Xia , Jia Li Juan , Qin Yu Feng , Sun Xiu Jun
Published: September 2013

Wave gliders as innovative autonomous ocean-going vehicles harvest the abundant marine natural energy for persistent ocean environment monitoring. This paper analyzes wave glider’s operating mechanism and builds the dynamic model of wave glider. By simplifying the model into 3 DOS in longitudinal plane and selecting three generalized velocity, the kinematic equations and the generalized force can be confirmed. Then, based on the equation of Kane vector operation modeling method, the explicit kinetic model of wave glider is presented. According to simulation study of the kinetic model, the relationship between the motion state of wave glider and the wave motion are indicated. The study provides theoretical guidance and reference for wave glider design.
Research on Modal Simulation and Experiment of a Radar Active Fixing-Board
Authors: Hou Shou Wu , Wu Ya Lan
Published: September 2013

As a major force-bearing structure of Active Phased Array Radar, the Active Fixing-boards vibration characteristics should be investigated in the engineering design stage and the prototype stage. In this paper, Finite Element Method (FEM) is used for modal simulation and the detailed modal experiment is used to analyze the modal parameters of the first 6 modes. The results show that the modal parameters calculated by FEM agree well with those by modal experiment.
The Dynamic Simulation of Vertical Planetary Wheel Sand Reclamation Equipment Based on ADAMS
Authors: Li Shan , Wang Yu Qi , Zhang Yun Hua , Liu Guan Yu
Published: September 2013

Vertical planetary mill is a kind of efficient grinding equipment. Due to its unique design, the materials can suffer combined effects of squeezing, shearing and grinding. this paper developed the virtual prototype of vertical planetary grinding wheel sand reclamation equipment based on virtual prototyping technology, and did the dynamic simulation with this virtual prototype. It will use ADAMS to do the dynamic simulation, and it can provide reference price for staff.
Analysis & Study on Pneumatic Characteristics of Unidimensional Correction Projectile Based on Resistance Circle
Authors: Qin Jie , Zhang Ming Yu
Published: September 2013

For the problem of one time trajectory correction, a new correction mechanism changing the resistance pieces area is given. The projectile motion locus can be controlled by increasing resistance. In view of the issue of correction trajectory of flying body, the aerodynamic characteristics are changed by the size of resistance ring unfolded area. The comparison between resistance ring flying body and ordinary flying body has been analyzed about the three-dimensional flow field in different sonic. This paper researches related variation and factors of the aerodynamic characteristics with the size of resistance ring unfolded area as a characteristic parameter. The changes of the size of resistance ring unfolded area have a significant impact on resistance coefficient of the flying body. Damping plate affects the part flow field of the flying body and then the whole flow field. On the leeward side of damping plate, there forms the obvious whirlpool area. Due to the low pressure of the whirlpool area, there brings the pressure difference between windward and leeward of the damping plate, and this situation exists in the conditions of subsonic, transonic, and supersonic.
Dynamic Model of Automatic Transmission System of Tracked Vehicle
Authors: Yi Jun , Chen Shui Sheng , You Da Zhang
Published: September 2013

The dynamic characteristic of automatic transmission system of tracked vehicle was thorough analyzed. The primary characteristic of torque converter was proposed by means of regression analysis of test result. The dynamic model of three-freedom planetary transmission was constituted using drive principles of planetary transmission. Thus the foundation of intelligent control and simulation system of automatic transmission of tracked vehicle was established.
Numerical Simulation on Flight Dynamic Characteristics of Elastic Wing Based on Gust Response
Authors: Dong Wen Hui , Yang Chun Lei , Li Yan Hui , Jia Hong Guang
Published: September 2013

In this paper, the numerical method was developed to flight dynamics characteristics of elastic wing under the action of the discrete gust. In this numerical method, the aerodynamic forces of the elastic wing were calculated by solving the unsteady Navier Stokes equations, and incorporating the grid velocity method to simulating the gust response of the typical NACA0006 airfoil to the step changes in the angle of attack of aircraft . it is shown in results that the calculated lift responses of the airfoil agree well with both the exact theoretical value and calculated value in reference. the elastic effect was considered with RayleighRitz method, so that the fluid dynamic,structural dynamic and flight dynamic problems can be coupled to solve. and AGARD445.6 elastic wing for the numerical simulation of the flight characteristics.
Design and Performance Simulation of a Power-Integrated Transmission Mechanism
Authors: Mo Chou , Chen Ji Qing , Lan Feng Chong
Published: September 2013

The power system structure of a hybrid electric vehicle (HEV) critically affects the performance of the vehicle. This study presents a power-integrated transmission mechanism that can provide six basic operating modes that can be further classified into 15 sub-modes. Switching clutch conditions helps transmission achieve speed and torque coupling. The proposed mechanism has CVT capability and an extended range capacity, and it is applicable to front-wheel-drive, rear-wheel-drive, or four-wheel-drive HEVs. A performance simulation on power and economy via Matlab and Cruise software demonstrates that the performance of the proposed transmission mechanism meets the target. Therefore, the mechanism is a feasible candidate for use in HEVs.
Vibratory Stress Relief of Central Air-Conditioning Evaporator
Authors: Dong Xue Wu , Han Jian Hui , Ren Dai , Mu Kai , Liu Dong Peng , Du Yao Li
Published: September 2013

Tubular evaporator is one of the key components of central air-conditioning. It is necessary to do aging treatment to relief residual stress and prevent leak phenomenon from structural deformation. Vibratory stress relief (VSR) can relieve residual stress in metal component. It has high efficiency with energy-saving, no exhausting and low cost. However vibration parameter impacts effect considerably. The author determines vibration parameter based on vibration mode and stress distribution. The relative parameters cover excitation frequency and point, support point etc. We measured residual stress both for after welding and VSR treatment lasting 30 minutes of the component. Result shows that residual stress is reduced by 61%. Residual stress between different points is decreased by 85.56% after VSR. Therefore, VSR should be carried out by vibration parameter based on vibration mode and stress distribution. At last we can say that our innovation is adapt to determine the VSR technical parameter for all metal components.
Simulation of Roll Stability of a Van in Cross-Wind
Authors: Wang Yan , Hu Xing Jun
Published: September 2013

To evaluate the stability of a van in cross-wind., dynamical model was built to deduce lateral acceleration and critical wind speed before rollover based on the theory of system dynamics and aerodynamics. Applying the simulation software TruckSim, parametric models considering the affect of aerodynamics and cross-wind model were constructed. By changing the parameters such as the wind speed the speed of van and centroid height, the influence of crosswind on roll stability of van was simulated and analyzed. More intuitive basis for safe driving in cross-wind is provided.