bluuebunny/crossref_metadata_2025 huggingface dataset:
Empirical Analysis on Farmers' Mortgage Willingness to the Land Management Right and its Influencing Factors
Authors: Yu Li Hong , Lan Qiang Gao , Li Chen Wei
Published: August 2013

Rural land mortgage loan is an important part of rural financial products and service modes innovation. As the main demand party of rural finance, farmers mortgage willingness is significant to the development and spread of rural land mortgage loan business. This paper, based on the survey data of 140 farmers in Liaoning Province in China, analyzes the mortgage willingness to the land management right and its influencing factors by using the Logit mode. The research results show that farmers mortgage willingness to the land management right is influenced by their age, working experience, the total area of their land, land transferring willingness, income source and supportive policy of the government. Based on the research, this paper also puts forward suggestions on quicken the development of land management right mortgage loan business.
Container Ship Investment Based on Real Option
Authors: Yu Si Qin , Ji Bin , Chen Jin Hai
Published: August 2013

This study investigates liner companies' timing of investment and sealing up container ships based on real option theory. The Dixit model is adopted to find out a pair of trigger prices for entry and exit with the assumption freight rate obey Geometric Brownian Motion. More new ship-building orders and entrants lead to lower future freight rate in the oligopoly liner shipping market. This model is tested empirically basic on the data of a 9000 TEU container ship on Far East-Europe route and the result is positive comparing to the number of ship orders. Liner companies' should make decision base on the freight of the ship in operation. Therefore, ship investment should be made at the new ship order trough and freight trough.
Research on the Credit Management of Commercial Banks of Lianyungang City for the SMEs
Authors: Chen Jun Yi , Han Shu Ping
Published: August 2013

At present, the credit management mode of commercial bank in lianyungang for the SMEs is still in the exploring, although the various credit policy for the small and medium-sized enterprises has been come out, the risk management plan and operation method that really suit for credit demand for the SMEs is still not mature. and it caused that the bad debts and dead loan were overstoched in lianyungang commercial bank, thus it seriously impact on the capital operation of commercial banks, and then it has caused some adverse impact to the development of local economy. Therefore, it is necessary for commercial banks in lianyungang city to supervise and manage the whole process of credit of the small and medium-sized enterprises.
Analysis of Agricultural Products Quality Management Information System in Zhejiang
Authors: Qian Huang Tao , Huang Xiao Ying , Bao Zheng Yu , Ye Xiang He
Published: August 2013

As an example of the research on zhejiang local agricultural management, this paper analyzes the research results and summarizes the different agricultural management characteristics.From overall tracking of farmland to table process and grasping the key of management, thinking the problems of security and standardization on produce quality management information. At last, it combines with our actual development situation of our countrysagricultural,product quality anagement,innovation and build a new quality and safety management system, providing theory basis of agricultural management system.
Research and Design of University Logistics Management System Based on J2EE
Authors: Wang Meng Jie
Published: August 2013

This paper analyzes the status quo of Chinese Universities logistics management information system; using the Struts framework based on J2EE university logistics management information system, and the basic structure of the system, the main features integral part of, the main function analysis; combination of university logistics management the actual analysis of the information system client Web layer, business layer, data layer is designed to build stability, flexibility and scalability, easy maintenance of university logistics management information system, and enhance the logistical support capabilities, strengthening the logistics market management, improve work efficiency.
Study of Insurance Information Base on Data Mining
Authors: Yu Jian , Yan Yu
Published: August 2013

With the rapid development of domestic economy, the insurance industry has entered the era of fierce competition. While many domestic insurance companies face the policy a lot of business data, they do not have the corresponding ability to carry out deep analysis and mining on massive data bring added value, can not let great effect for enterprise development. Application of data mining technology in the insurance industry, can help the insurance company to improve the level of management and decision, to create a higher rate of return on investment for insurance companies and users. Application Research of the literature data about mining in insurance industry is still very few, this paper will try to explore this area, and put forward specific proposals for data mining technology in the application of insurance of our country problem.
Construction of the Library Management System Based on Data Warehouse and OLAP
Authors: Xu Mao Li , Li Xiu Ying
Published: August 2013

Along with the evolvement of data warehouse technology, the establishment of the decision support system for libraries is becoming more and more important. This paper provides the architecture of the data warehouse-based library decision support system and focuses on discussing the model design and implementation technology of data warehouse building.
Research and Simulation of Supply Chain Disruption Based on Contract
Authors: Lian Qi , Jia Su Ling
Published: August 2013

In order to research the long-term disruption influence on supply chain and the performance that contracts exert on supply chain when disruption happens, this paper constructs a VMI three-echelon supply chain model based on system dynamics. Through dynamic simulation of the model, the total inventory, total profit and market demand shortage data are respectively collected under conditions of no disruption, manufacture disruption and transport disruption. By descriptive statistical analysis of these data, we find the disruption has secular and hysteretic effect on the supply chain. Furthermore, T test is used to testify the contracts effectiveness on the supply chain under disruption conditions. These analytical results show that quantity discount contract and revenue sharing contract can effectively relieve the negative influence on the supply chain when disruptions happen, since they not only enhance the total profit but also stabilize the fluctuation of the supply chains total inventory, whereas the contracts do not perform well in satisfying the market demand shortage.
Electron in a Quantum Wire in the Presence of Parallel and Perpendicular Magnetic Fields
Authors: Duan Xiu Zhi , Wang Guang Xin
Published: August 2013

The electron states of self-assembled rectangular quantum wires (QWRs) are investigated in detail in the presence of a magnetic field. The calculations are done in the single band effective mass approximation. We study the electron states for the magnetic fields applied along and perpendicular to the wire, taking into account the different masses of the various particles inside and outside the QWRs. The electron energy and the influence of the magnetic field are discussed in this paper.
The Analysis of Smart Car Guided by Electromagnetism
Authors: Li Wen Zhuo
Published: August 2013

Nowadays, since there are many artificial intelligence techniques introduced into our daily life, which brings us much convenience, its a real hope that our transportation can be improved by artificial intelligence. In this article, a smart car with the detecting and following ability is introduced. The whole system is composed of the road track signal device; the electromagnetic sensor; the power source manage device; the engine drive device and the parking position detecting device. By using the PID, Bang-Bang and fuzz control methods, the smart car can collect the signal automatically and control the car moving effectively. When there are specially designed roads with electromagnetic field, our smart cars can automatically drive themselves.
A Study of the Starting Control Strategy of the Mini-Car with Magnetic Powder Clutch
Authors: Wu Xiao Gang , Hu Chen
Published: August 2013

Aiming at starting process of the mini-car with the magnetic powder clutch, the control strategy with different parameters is proposed. The parameters are the opening degree and change rate of the throttle, the objective speed and actual speed of the engine, the engine lowest combination speed, and the transmission input shaft speed. The results show that, this control strategy can fit the starting intention. The car can start reposefully and rapidly and the sliding friction work is relatively low. The engine speed changes reposefully in the combination. The fuel consumption and the noise are decreased.
Motion Planning of a Nonholomonic Mobile Manipulator for Moving Object Grasping
Authors: Chen Nai Jian , Song Fang Zhen , Zhao Hong Hua , Li Ying Jun
Published: August 2013

This paper studies a nonholonomic mobile manipulator that consists of a wheeled mobile platform with a mounted serial manipulator. It is designed and developed to navigate autonomously in handling moving objects subjected to nonholonomic constraints. A camera is mounted on the front of the platform and employed to identify and collect information about distance, velocity and direction of the object. With that information collected, a motion planning system determines the preferred operation region and the obstacle-avoidance area, and thus generates the expected trajectory of the mobile manipulator. Experimental results are shown that the mobile manipulator can identify the target, generate trajectories and grasp the moving object autonomously.
Design and Implementation of Point Light Source Tracking System
Authors: Dong Pei Chao , Xu Hong Ke , Lin Shan
Published: August 2013

Base on the fuzzy reasoning technology and digital signal processor technology, this paper designs a DSP-based point light source fuzzy tracking system, which can be used to improve the efficiency of solar panels. By analysis characteristics of the system and summing up the experience, it gave a set of fuzzy control rules, and determined some important control parameters. It uses the DSP as the core of the system control unit to ensure the real-time and stability. Simulation and experiments results show the system has a good performance.
Influence Factors Analysis of SAR-GMTI System Performance
Authors: Qiong Wang Guan , Wen Li Jing , Yang Wei
Published: August 2013

Many factors impact on the performance of SAR-GMTI system. Besides of minimum detectable velocity (MDV), the performance of SAR-GMTI system is involved in probability of detection and probability of false alarm when considering the interference factors (such as thermal noise, phase drift and unbalance between channels, etc.) and the stationary clutter. These three features of SAR-GMTI system are related to the values of the number of looks, CNR, SCR, the radial velocity of moving targets and so on. However, there is no paper described how these factors impact on the performance of SAR-GMTI system systematically which will strongly support the study of improving detection performance. This paper analyses influence factors and provides a group of reasonable value of them for simulation.
A Method to Improve the Measurement Precision of the Traffic Radar
Authors: Wu Xin Jie
Published: August 2013

When multiple targets run through radar at the same time, the current traffic speed radars have more speed error. This paper presents an improved measuring method, provides a solution to improve time-frequency resolution. We can improve the speed resolution when adopting the algorithm proposed in the paper.
A New Feature Based on the Fluctuation Analysis to Detect Low Observable Target within Sea Clutter
Authors: Sun Kang , Jin Gang , Wang Chao Yu , Zhu Xiao Hua
Published: August 2013

In this paper, a novel approach based on the fluctuation analysis for the target detection in sea clutter is proposed. The self-affinity and scaling behaviors of sea clutter is analyzed by using the mean fluctuation. The q-th order normalized slope of the mean fluctuation curve is used as the characteristic parameter to describe the fractal property. The tests on the real data show that the target could be clearly distinguished from the sea clutter background with the proposed approach.
Metering Infrastructure and its Reference Architecture of Smart Distribution Grid Based on the Domain Model
Authors: Sun Ying Yun , You Ya Xiong , Chen Ying
Published: August 2013

nformation facilities play an important role in guarantee for smart distribution grid (SDG) security and stability, and the SDG metering infrastructure will play guiding role for the construction of SDG information facilities. This paper firstly elaborates the conception of the SDG metering infrastructure from the perspective of demand of information system in SDG, and then analyzes the functional demand and features of metering infrastructure during the development of SDG. Finally this paper proposes the reference architecture of SDG metering infrastructure using the domain in conceptual model of smart grid and has a detailed analysis on the inner-domain data source, data communication channel and data center of reference architecture.
Novel Global Maximum Power Point Tracking Algorithm for PV Array under Partially Shaded Conditions
Authors: Zhang Fang , Li Chuan Dong , Wu Yan Juan
Published: August 2013

Under partially shaded conditions, the P-U characteristic of the photovoltaic (PV) array is characterized by multiple peaks. The presence of multiple peaks reduces the effectiveness of the existing maximum power point tracking (MPPT) schemes, which refers only to the tracking of a single peak on the P-U characteristic. This paper proposes a novel method for the global MPPT. The new method starts at the starting voltage which is 80% of the open-circuit voltage of the PV array, and finds the first local maximum power point (MPP) using the perturb and observe (P&O) approach. Then the second search finds the next local MPP based on the P&O approach starting from the new starting voltage, which is determined by increasing the rate of slope of the current line at the first local MPP. The new algorithm follows this searching procedure until the global MPP is found. The new algorithm avoids searching the turning-point voltage between the two local MPP, and the voltage range swept is shortened significantly with the result of fast searching speed. Simulations validates that under partially shaded conditions the proposed new algorithm can track the global MPP with the fast tracking speed and the high precision.
Wind Turbine Risk Assessment Using Modified Failure Mode and Effects Analysis
Authors: Dong Yu Liang , Su Ye , He Cheng Bing
Published: August 2013

Aiming at the problem that the failure history data available from wind turbine are scarce and often accompanied with a high degree of uncertainty, the risk assessment using traditional failure mode and effects anaysis (FMEA) may not be well-suited. A wind turbine risk assessment method based on modified FMEA is proposed. The method introduces grey theory into traditional FMEA and use the degree of relation to rank risk level. The method is then used to assess the risk of a 1.5MW wind turbine. It is proved that this method can rank the risks of main failure modes.The assessment results can be used as a support for risk based maintenance decisions.
Research on Three-Phase VIENNA Converter for PFC
Authors: Wang Gui Xing , Xu Chun Lei , Zhang Hong , Yan Hao , Yang Chun Yue
Published: August 2013

In order to get the stable output, the small switch pressure resistance and the high power factor with the high power three-phase rectifier, the three-phase VIENNA PFC circuit topology was studied, and the principle of VIENNA rectifier was investigated, based on the original concept of the control method, the interval control with hysteresis control method were used to control the whole rectifier circuit. Throughout the system design had been completed, the MATLAB model is built for the design of the circuit simulation, the simulation results show that the system output is stabilizing output, and the pressure resistance of the switch device is half of the output voltage, and the input power factor is 1.And set up some small prototype to verify the control method of the rectifier.
Study on the Insulating Spacers Surface Discharge of GIS
Authors: Liu Yun Peng , Wang Zi Jian , Li Yan Song
Published: August 2013

Gas insulated switchgears occupy an important position in the power system.Insulating spacers are important parts in GIS, a research on the surface discharge characteristics is conducted, mainly using ultraviolet imaging technology, ultrasonic testing technology and pulse current method to test the whole discharge process. Based on the data analysis, get the following conclusion: 1) Ultraviolet photons indicator shows the "saturation" characteristic, when the voltage up to 68kV later, continue to increase the voltage, ultraviolet photon number increase is not obvious; 2) In the basin insulator defect, with discharge intensifies, charged particle collision more intense, the heat increase, so the local volume rapid expansion, the pressure increase lead to enhance the ultrasonic signal. These works provide a valuable reference for follow-up study of GIS.
Precision Analysis of Parametric Modification of the Die Face Based on Reverse Engineering
Authors: Fan Jun , Wang Lei Gang
Published: August 2013

The conventional precision analysis method of modification and design is qualitative, laborious and time consuming. The precision of reverse parametric modification have direct influences on the quality of the reversed products. In this paper, a quantitative analysis method based on a reverse parametric approach and precision control concept is proposed. Combining with the ATOS scanner system, analyzing every aspect of the precision control and the error distribution, including data acquisition process, reverse reconstruction process and parametric process. In the process of the product reverse parametric modification, general error distribution is mainly composed of data acquisition error, reverse reconstruction error and parametric error. The method of precision control during the reverse parametric modification process is analyzed, according to this method, the total error of parametric modification for die face is 0.089mm, is lower than the accuracy requirement of 0.10mm in the reverse parametric modification process, the reverse modification of the die face of the blade based on precision control is realized. Validity and effectiveness of the method has been confirmed by case studies.
An Optimal Design of PI Control in the Application of Active Power Filter
Authors: Wang Yun Liang , Yu Xiao Feng
Published: August 2013

This paper mainly introduces an optimal design of PI control based on compensation to eliminating the interference and improving the performance of the system. With the mathematic model of shunt APF in d-p rotating coordinate, simulation indicates that there is a period disturbing signal in the current closed loop of shunt APF based on the conventional PI control, which obviously impacts on the current tracking performance of the system. So a new PI control based on compensation is put forward. Through the simulation in the platform of Matlab/Simulink, it turns out that this method can improve the current tracking performance of APF and stable performance of the system.
A Study on Tracking Accuracy of Netted Radar
Authors: Zhao Yan Li , Wang Hua Bing , Gao Xiang Dong , Chen Yuan Zheng , Yan Zhou Jie
Published: August 2013

The Cramer-Rao Lower Bound (CRLB) for the location accuracy of the netted radar is explored and the CRLB for the nonlinear filtering of a single radar is derived. The calculation process of the CRLB for the location accuracy of the netted radar is given by combining the above results. Simulation tests for the location and tracking accuracy of the netted radar under different conditions are conducted and several factors affecting the tracking accuracy of the netted radar are analyzed. The theoretical achievement derived in this paper can be used as a key theoretical basis for the evaluation of the performance of the netted radar.
Reduction of Glitch Interference in FPGA Design
Authors: Xiong Guo Hai , Liu Xin Yun
Published: August 2013

The cause of generating glitch during the use of FPGA for designing electronic system is discussed. Signals have certain delay when passing through the FPGA device, thereby making the combinational logic output to generate sequencing, and some incorrect glitch signals could be generated, which affect the stability of the circuit. The article proposes that methods of gray code, delay method and synchronous circuit can be adopted to reduce glitch interference in FPGA design from the aspects of software and hardware, the above method is comprehensively used in designing electronic design to ensure that the system is not affected by glitch, thereby improving the reliability of the system.
Improved Baseband Mapping Method for G3 OFDM Technology
Authors: Gu Zhi Ru , Liu Da Wei , Liu Hong Li , Xu Kun
Published: August 2013

G3-PLC, an orthogonal frequency division multiplexing (OFDM) power line communication solution, has recently gained a lot of attention. It supports the application of four types of baseband mapping modes in different environments. These modes typically require a hard-decision demodulation, which will lead to nearly 3dB preference loss. In this paper, we propose an improvement scheme for the baseband mapping modes by changing the constellation encoding method. The optimal soft decision algorithm which makes use of log likelihood ratio (LLR) of the probabilities is used in the demodulators. Simulation results show that the proposed scheme can outperformer many existing algorithms.
Airborne Doppler Navigation Radar Intelligent Test System
Authors: Zou Tao , Zeng Xian Lin , Zhang Wei Dong
Published: August 2013

Based on the virtual instrument technology of the airborne Doppler navigation radar intelligent detection system is introduced, whose Direct Digital Synthesize is designed using Direct Digital Synthesize, producing high resolution Doppler frequency signal through the digital control. The software is written with Visual Basic 6.0, which offer users an intelligent and automatic test environment and test interface. People can easily complete the radar fault detection complete the radar fault detection. The intelligent integrated test system has advanced technology, superior performance, simplicity of operator, strong real-time and convenience of expanding, which has a very important significance to ensure flight safety and improve the fighting capacity.
High-Order Active Filter Design Based on Component-Level Signal Flow Graph Method
Authors: Huang Yuan Xin , Li Kun , Xuan Xiu Wei , Teng Jian Fu
Published: August 2013

In this paper, a seventh-order elliptic low-pass active-RC filter with three finite transmission zeros is designed for the baseband filter of a 433MHz wireless communication terminal. While designing, the canonical signal flow graph (SFG) method is applied based on component-level simulation of LC ladder prototype circuit. The simulation and measurement results show that the filter satisfied the design specifications.
Foundation of the Speech Source for the Speech Warning System of the Plane
Authors: Zhang Wei Dong , Zou Tao , Zeng Xian Lin
Published: August 2013

The presence of aircraft voice alarm system voice recording work is limited by the staff, environmental and complicated operation, not applying to automatic test, difficult secondary development and poor versatility, for which we set up a library of standard voice using voice IC, using computers to control the voice of the call need information, combined with speech synthesis technology, which can synthesize voice alarm information corresponding to the full with the desired model aircraft. This paper elaborates on the basic principles of the system, the establishment of a process and the realization of human-computer interaction. The device is very easy to communicate with other devices, if used for a different system, without changing the hardware circuit, simply by changing software and voice can be required, good portability and versatility.
Energy Based Dual-Microphone Electronic Speech Segregation
Authors: Jiang Yi , Zhou Hong , Zu Yuan Yuan , Chen Xiao
Published: August 2013

Speech segregation based on energy has a good performance on dual-microphone electronic speech signal processing. The implication of the binary mask to an auditory mixture has been shown to yield substantial improvements in signal-to-noise-ratio (SNR) and intelligibility. To evaluate the performance of a binary mask based dual microphone speech enhancement algorithm, various spatial noise sources and reverberation test conditions are used. Two compare dual microphone systems based on energy difference and machine learning are used at the same time. Result with SNR and speech intelligibility show that more robust performance can be achieved than the two compare systems.
Optimization for Loading Path in Rear Sub-Frame Hydroforming Using Uniform Design and Response Surface Method
Authors: Li Wen Ping , Wu Ya Peng , Liu Ji Yan , Li Xin Jun , Wang Zhong , Jin Miao
Published: August 2013

Rear sub-frame is one of the important parts of automobile chassis. Tube hydroforming (THF) is a kind of the advanced manufacturing technology to produce the sub-frame. The success of a THF process is highly dependent on the loading paths (axial feed versus pressure) used. The uniform design method combined with the response surface method was used to optimize the loading path in this paper. The results obtained by numerical simulation demonstrated that product quality is good in the optimized loading path.
A Novel Scheme for Time Delay Estimation in the Fractional Fourier Transform Domain
Authors: Li Xue Mei
Published: August 2013

A time delay estimator based on the fractional bispectrum is proposed; and it is suitable for the chirp signal. The proposed time delay estimation technique can outperform the conventional time delay estimation methods associated with the bispectrum in the Fourier domain under the correlated Gaussian noises at lower SNR. Simulation results demonstrate the validity of this estimation method.
The Application of the Moving Object Detection in HD Video Surveillance System
Authors: Li Lian , Liu Yong Peng
Published: August 2013

Today the existing image processing systems widely used standard definition resolution. Which is not enough distinct. High definition (HD) and intelligence gradually become the developing trend of the image acquisition and processing system. Motion detection plays an important role in video surveillance system. The sign distribution features will be covered up by the use of the absolute differential image. In this article, a method to determine the motion direction of moving objects by using the sign distribution features in the differential image of two consecutive frames is proposed. To extract the characteristics of the moving object regions,Other parts as the background image is still. The transmission should been stopped, if there is no moving object. These should save storage space and reduce the demand for network speed. Experimental results show that algorithm of the method is suitable for computer processing.
Effects of ASE on DPSK Modulation Formats with Different Duty-Ratio in Optical Transmission System
Authors: Hu Jin Hang , Guan Ya Lin , Lin Jin Cai
Published: August 2013

In optical networks, erbium-doped fiber amplifiers (EDFAs) are used to provide a wide and flat gain spectrum. Amplified Spontaneous Emission (ASE) emitted from EDFA adds to signal and grows rapidly. This accumulated ASE noise may limit the effective amplification due to saturation effect and affects the receivers bit error ratio (BER). In this paper, we show the impact of ASE noise in transmission fiber by using three different modulation formats: 33%DPSK, 66%DPSK and DPSK. In recent years, optical fiber communication system began to use the DPSK (Differential Phase Shift Keying) format to replace the traditional OOK format, which has been intensively investigated in numerical and experimental works.
Performance Analysis of MAC in VDL2 Based on OPNET Simulation
Authors: Gao Lin , Wu Zhi Jun
Published: August 2013

As one of VHF data links of ATN, VDL2 is publicly recognized as the next generation data-link in the transition period. The paper focused in the performance research of MAC, of which p-CSMA is the core protocol, based on network simulation. As the precondition of simulation, we build VDL2 model in an integral way and realize MAC process modules in both ground station side and aircraft side applying dynamic process and queue management mechanism. In the paper, Performance targets are defined to evaluate the system performance. Through simulation, trends between parameters and targets are reached and the relationships are revealed between packet delay and throughput\ packets strength.
Research on the Method of Text Information Hiding Based on XML
Authors: Chen Li , He Wei , Shu Hou , You Fu Cheng
Published: August 2013

The information hiding is a technology of hiding the message that you want to send into the multimedia carrier signals secretly, realizes hidden communication or identification ultimately. XML is the format of information exchange on the Internet. It has received a wide range of applications and supports once be proposed. In this paper, several text information hiding methods are analyzed based on the structures and characteristics of the XML documents. At last, the paper realizes the information hidden by applies to the method of changing the mark letter case.
Research on Entity Resolution Algorithm Based on Domain Ontology Using MapReduce
Authors: Zhou Peng Xia , Huang Shi Hang , Jiang Xue , Wang Jun Jie , Dang De Peng
Published: August 2013

DO-Swoosh algorithm maps the input data to domain ontology and count the amount of data for each leaf node. Then define the distance between nodes according to the hierarchical relationships reflected by domain ontology and propose a node merging algorithm based on the principles of data balance and nearest merge. At last, perform entity resolution for each group according to the node merging result. DO-Swoosh still keeps the good generality and gets better performance and scalability with the aid of MapReduce.
A New Watermarking Algorithm for Relational Database Copyright Protection
Authors: Li Zhi Ping , Jiang Chuan Xian , Li Zhi
Published: August 2013

In order to enhance the robustness of database watermark, a watermarking algorithm for relational database copyright protection is proposed. Some types of data are selected from the relational database according to filtering rules, and two-dimension signal is formed. Then, the watermarking is embedded into the wavelet domain of two-dimension signal. We analyze that the wavelet high frequency coefficients of corresponding data follow the Gauss distribution and give the definition of the intensive factor. Employing the linear correlation detecting method, we can embed the watermark successfully in wavelet domain. The watermark can be distributed to different parts of the relational database. Experimental results show that the embedded digital watermarks with the proposed algorithm are invisible and some degree of robustness against the commonly used database processing techniques.
A Bit Rate Control Adaptive Optimization Algorithm for H.264/AVC
Authors: Chen Bing Quan , Liu Da Wei , Lei Li , Liu Hong Li
Published: August 2013

Existing bit rate control methods for image sequence are not user friendly because finding a suitable quantization parameter is difficult. In addition, these methods commonly make use of a linear prediction model for time correlation, which may not be accurate in practice. In this paper we present a new algorithm for bit rate control. It starts with preprocessing step which analyzes the quantization parameters before coding image sequence. It also takes into consideration the characteristics of the image sequence Experimental results show that: the presented algorithm can accurately control the bit rate and significantly increase the peak signal to noise ratio value for a given image.
Optimisation of Process Routing in CAPP Using Genetic Algorithm and Graph Theory
Authors: Huang Shuai Jun
Published: August 2013

For the problems in process routing optimization of Computer Aided Process Planning (CAPP) system, the major shortcomings in the previous were analyzed and corresponding means for improving were put forward. Process digraph, as an effective process routing decision-making model, was established based on precedence constraints among operations. An algorithm was designed to operate the process digraph and then a number of process plans all feasible were obtained for the initial population. In order to solve the problem that some infeasible process plans generating in evolutionary process, the repair method of infeasible process plan in the evolution process was proposed. A case study has been carried out to demonstrate the feasibility and efficiency of the proposed approach. Finally, conclusions and future work are summarized.
The Researches of Enterprise Informatization Upgrade Investment Resource Allocation
Authors: Lu Shan , Yang Yi Ping
Published: August 2013

Based on resource allocation problems, the article explored the upgrade informatization investment theories and methods of bi-level programming method. It is used to construct resource allocation model of informatization promotion investment, in order to provide useful reference for the informatization investment research in the future.
Dynamic Damage of Aircraft Wing Leading Edge Impacted by Birds
Authors: Jun Liu
Published: August 2013

In order to verify the preliminary design of Aircraft Wing Leading Edge structures to bird impacting loads. The tests of bird impacting on Wing Leading Edge structure configurations were carried out using the relevant experimental facility. The impacting velocity was measured by laser velocity finder. The structure configuration was impacted by bird on three points and the whole process of dynamic deformation and damage on bird and Wing Leading Edge structure were recorded using high speed camera system. The test results showed that the leading edge slat was weak in anti-bird impacting and can not satisfy the airworthiness certification requirements. At the meantime the test results provid abundant experimental validation datas for the numerical simulation model applied in birds impacting.
The Study of Water Resources Optimal Allocation of South-North Project Receiving Area
Authors: Liu Bin , Sha Jin Xia , Yan Zhi Hong , Zhang Ting Ting
Published: August 2013

With the rapid development of economy, the shortage of water resources became more serious at the eastern of Handan city, it is important to allocate the limited water resources reasonably. Based on the multi-objective planning theory, building up the model of the optimal allocation water resources. The goal of the model targeted at the maximum benefits of the economy, the society and the environment, which solved by PSO, to acquire the water resources optimal allocation program of different guaranteed rate in 2030, and supply the basis for the water resources planning and management. The results of optimal allocation show that the PSO is feasible in the water resources optimal allocation.
Numerical Simulation of Pressure Loading Effects on Occurrence of Rock Lateral Cracks under Confining Pressure
Authors: Kang Yi Lan , Chen Pei Qi , Huang Gan Yun
Published: August 2013

Numerical simulations of pressure loading effects on occurrence of rock lateral cracks under confining pressure were performed by using the numerical analysis software. The results indicate that the rock tends to have median cracks with the increasing of penetration under no confining pressure, while the rock tends to have lateral cracks with the increasing of penetration under confining pressure. The relative position of lateral crack initiation is dependent on the confining pressure when loading, which is independent of the penetration. The greater the confining pressure, the closer the lateral crack location to the rock surface. With the increasing of penetration and confining pressure while loading, the lateral crack direction is towards to the direction parallel to the rock surface.
Influence of Porous Structure Properties on Anti-Drillability Characteristics of Rock
Authors: Zhang Li Gang , Yan Tie , Li Shi Bin
Published: August 2013

The rock porous structure properties, mechanical parameters and drillability of Haita areaby using Rock slices test, compressive strength test and drilling pore structure characteristics, rock pore structure having good fractal properties was found, the fractal dimension could reflect the rock pore of the development and distribution characteristics, and have the great impact on the physical and mechanical properties of rock and drilling resistance.
Numerical Simulation Study of Daqing Wuzhan Low Permeability Gas Reservoir
Authors: Lu Yu Feng , Yang Min , Li San Chuan , Lv Bo
Published: August 2013

Daqing Wuzhan gas field is a deformable low permeability gas filed. Based on the lab study of changing law of porosity and permeability with confining pressure, a numerical simulation model of deformable low permeability gas reservoir is established and is solved by using IMPES method. Comparing with the result of eclipse shows the method is valid. Field example shows the dynamic geological reserves of Wuzhan gas field is low and the new wells should be drilled at the area where there is production potential and larger effective thickness. Comparison of results obtained from different models with field data shows the result considering medium deformation is more reasonable.
Development of a Multi-Function Virtual Instrument Based on a Constant Current Source
Authors: Dai Dong Bing , Wang Ya Jun , Sun Ye Ping , Liu Zheng Guang
Published: August 2013

Virtual instrument is a result of the computer combined with some instrument hardware, working for the instrumentation applications, it is one trend of the instrumentation development .This paper presents a design of a high-power and high-precision constant current source, studied three different electrical testing technologies based on constant current source and propose the principle of integrated the three electrical test technologies on a virtual instrument platform. A multi-function virtual instrument system based on LabView language, USB data acquisition card and a constant current source has been developed. This system has a high accuracy, high integration and a thecapability of further development etc..
Sum-Frequency Generation of Antiferromagnetic Sandwich Structure
Authors: Liang Hong , Fu Shu Fang , Zhou Sheng , Su Chun Yan , Lin Wei Qiu
Published: August 2013

We present the sum-frequency (SF) generation of antiferromagnetic sandwich structure NM/AF/NM in the THz frequency field. In the geometry with the anisotropy axis parallel to the film surface and normal to the plane, using TE wave obliquely incident upon the film, we find that SF outputs is sensitively affected by the incident angle and the incident frequencies.
Research on Purification Performance of Diesel Exhausts Four-Effect Catalytic Purification System
Authors: Yao Guang Tao , Wu Heng , Guo Zi Rong , Jiang Da Hai , Liu Hong Wei
Published: August 2013

A test methodwas designed to evaluate the purification performance of Diesel exhausts four-effect catalytic purification system which was based on the oxidation catalyst, NOx reduction catalyst and carbon particles combustion catalyst.Then the method was usedto test the purification performance of a four-effect catalytic purification systemconsist of DOC,CDPF andSCR. The results of the test show that, with the use of the four-effect catalytic purification system, the combustion T50of the soot can reach 330 ~ 400 °C which shows that the combustion of the soot has been catalyzed effectively.The rate of the deoxidized NO can achieve 90% abovewhich shows thatthe selective deoxidation of the NOx has been catalyzed effectively.
Switching Multisensor Improved Current Statistical Model for Maneuvering Target Tracking
Authors: He Qi Fang , Li Yan Bin , Lv Hang , He Guang Jun
Published: August 2013

For an actual maneuvering target tracking system, the random change of system parameters and structure can often occur. So the whole system is dynamic, and there is uncertainty in system parameters and structure. In the paper, theory of system with random changing structures and technology of sensor management is introduced to build a tracking model with random changing structures. For the considering of random changing, the transient error brought by structure random changing is overcome.
Numerical Simulation and Experiment Research on Surface Defects for Thick Plate Multi-Point Forming Process
Authors: Li Le , Wang Li Yong
Published: August 2013

Multi-point forming (MPF) is an advanced flexible manufacturing technology for three-dimensional sheet metal forming. The substance of MPF is replacing the conventional solid dies by a set of discrete punches called punch group. Due to the discrete contacts between the workpiece and punches, the dimple defects occurred, which are inevitable and particular for MPF. In this study, the analysis of the deformation features of the dimple defects was implemented. The dynamic explicit finite element method was chosen to implement the simulation of MPF process. The influencing factors of the surface defects were researched. The relevant experiment was implemented, and it verified that the forming defects decreased with the increasing of the thickness of metal plate and the objective surface curvature radius.
A Grating-Based Dynamic Measuring Method of Small Three-Dimensional Angles
Authors: Sen Li
Published: August 2013

Based on the diffraction theory of the one-dimensional gratings at oblique incidence, by introducing the laser autocollimation system, a novel approach of dynamically measuring small angles with three degrees of freedom is proposed. By matrix transform, a mathematical model is established to describe the changes of small 3D angles as a function of the variation of the image position of the diffraction spot, and the solution of this model is demonstrated. A prototype machine has been made to verify the practicability of the measuring method proposed. Analysis of the measuring range and resolution of the system shows that within the range of ±1.6 degrees.
Design and Research on Actuator of Robot Joint Based on GMM
Authors: Li Yuan Yuan , Zhang Sen , Ge Wei Wei , Sun Wei Li
Published: August 2013

The actuator of robot joint is designed based on Power source of the GMM. The working principle and characteristics of the GMM are discussed in detail and the work performance is validated by experiment. The differential decline amplifier configuration, the rotor and housing part are designed and the assembly drawings are gotten. After designing, the intensity of each portion is analyzed. Not only the mechanism of design of actuator of the robot joint is changed, and also the large-mass problem of the actuator mechanism of biomimetic micro-mechanical is solved. The reference is provided for other actuator mechanisms.
Ship Rust Removal Spray Painting Robot Finite Element Analysis Based on ANSYS
Authors: Zhou Shu Fang , Zheng Yi , Wang Na
Published: August 2013

In this paper, the three-dimensional model of derusting spray painting robot is established with 3-D software SolidWorks; and the afinite element model of the vertical guide rail is set up with ANSYS. The static analysis is carried on, based on the motion simulation analysis result of MSC. ADAMS. Stress and strain distribution is intuitively obtained under the worst condition, which provides basis for improving strength design.
Dynamic Characteristics of Five-Axis CNC Machine Tools
Authors: Luo Wei Ping , Chen Ting Ting
Published: August 2013

According to the five-axis CNC machine tools, the main components are put to flexible and a rigid-flexible virtual prototype has been established. The influence on the machine tool stability is analyzed. The reliable theoretical basis has been provided for the structure optimization. Results are shown that simulation analysis based on a rigid-flexible coupling model is more accurate to show dynamics characteristics of machine tools.
Research on Control Methods of Speed Stability by AR Model Based on Linear Ultrasonic Motor
Authors: Xu Zhao Li , Yao Zhi Yuan
Published: August 2013

Linear ultrasonic motor has a wide range of applications in the aerospace field, which requires not only high accuracy of the control, but also the need for a stable running speed. For broadening its application, it is necessary to keep the linear ultrasonic motor having a stable speed. This paper first proposes AR module method for linear ultrasonic motor. The speed of the linear ultrasonic motor is measured by the driving and controlling system. By minimizing the targeted speed value and the actual speed value, we can keep the linear ultrasonic motor stable. This text also compares this method with the traditional PID method. The average deviation of AR is 24%.
Fuzzy Control System of Water Level Based on Fuzzy Reasoning
Authors: Han Tao , Chen Xiao Hui
Published: August 2013

This paper introduces a control system of water level based on fuzzy control, describes the whole process of fuzzy reasoning. In this control system, the fuzzy controller's input and output variables are determined, and the fuzzy variable description. Then the choice of rules and fuzzy description, establishing fuzzy relationship, and fuzzy inference, and defuzzification.
Optimization Design of CVT Electro-Hydraulic Servo System Based on H∞ Control
Authors: Wang Yu Qin , Jiang Quan Sheng , Yang Han Sheng
Published: August 2013

In order to improve ride comfort and reduce the sense of frustration generated by the car when shifting, H robust control algorithm is proposed to optimize the design of CVT electro-hydraulic servo system. The CVT electro-hydraulic servo system is optimized by the development of system control model and the design of H∞ robust controller. The simulation result indicates that the systems uncertainties can be optimized effectively by the H∞ controller, while the systems anti-interference ability and robustness is improved obviously.
Research about Slider Three-Dimensional Frictional Contact Problem of the Polygonal and Similar-Oval Jib
Authors: Shen Shi Lin , Zhang Zhong Peng , Gu Bin , Chen Rong
Published: August 2013

The existence of boundary condition and friction are difficult to predict which makes the sliders contact situation extremely complex. The actual response of the contact region becomes a tough research by using traditional method. Taking the cylinder supporting function into account, the polygonal and similar-oval Jib models are established. Research of the stress distribution and the stress concentration phenomenon is analyzed. The results indicate that stress distribution of the sliders of the similar-oval Jib is more uniform in comparison with the polygonal Jib that it can ameliorate the stress state of the contact region and enhance the partial stability of the Jib.
Design of Double Lifting AGV Control System
Authors: Xu Wen Bin , Cai Rong Hua , Yao Xi Fan , Wang Hao
Published: August 2013

In this paper, we designed a double lifting AGV (Automated Guided Vehicle) control system, and applied in automobile powertrain assembly line and axle assembly. Front and rear drive dynamics wear adopted in wheels drive mode, steering gears wear used in body rotating. Tapes were used in AGV navigation. Wi-fi was accessed to wireless for data transmission between AGVs and scheduling center. AGV and auto assembly line used PSD synchronous track detection device.