bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Grinding Wheel for Polishing Diamond by Dynamic Friction Polishing
Authors: Shi Shuang Ji , Lin Jia Zhi , Jin Zhu Ji , Guo Xiao Guang , Zhou Ping , Kang Ren Ke
Published: September 2014

Diamond is widely used in the fields of precise and ultraprecise machining because of its superlative characters. Due to high hardness and great brittleness of diamond, the grinding of diamond needs a kind of high effective and stable polishing method. Dynamic friction polishing (DFP) is deemed to be an innovative method by means of a synergistic reaction of mechanical effect and chemical change. The condition of high pressure and high temperature puts forward a high requirement for mechanical property of the grinding wheel in DFP, other than that, the graphitization of diamond catalyzed by catalytic metal is also a focus of research. In this paper, the transition metals with unpaired d electrons were selected as polishing materials, and powder metallurgy technique was used to prepare alloy grinding wheel for polishing diamond by dynamic friction polishing.
Ultraprecision Micro Grooving on Brass for Surface Wettability Control
Authors: Asakura Kazuma , Yan Ji Wang
Published: September 2014

Fine micro grooves of various depths and pitches were fabricated on brass surface by ultraprecision micro cutting, and the effects of groove geometry and orientation on surface wettability were investigated. Results showed that the contact angle of a liquid drop changes significantly with the depth and orientation of the grooves. By optimizing the grooving conditions, the contact angle was increased to about twice that of a flat surface. Effects of crystal grain boundaries in the workpiece material and effects of cutting conditions on burr formation during micro grooving were studied by both experiments and finite element simulation.
Grinding Performance of Diamond Grinding Tools for Sapphire Crystal
Authors: Zhang Yu , Gao Shang , Kang Ren Ke , Guo Xiao Guang , Lin Zhi Fu
Published: September 2014

In order to improve the efficiency and reduce the cost of sapphire crystal machined by loose abrasive lapping, the fixed-abrasive diamond grinding tools for sapphire grinding were investigated in this paper. Four vitrified-resin composite bond diamond grinding tools with different grain sizes (40μm, 20μm, 7μm, 2.5μm) were developed. The grinding experiments were performed with the developed diamond grinding tools and the grinding performance of four grinding tools were evaluated by comparing the surface roughness and the material removal rate (MRR) of sapphire. The experiment results show that with the increase in grain size, both the MRR and the surface roughness increase. A high-efficiency and high-quality ultra-precision grinding process using diamond grinding tools with different grain sizes was proposed.
Study on a Novel Brazed Diamond Wire with CuSnTi Brazing Filler
Authors: Zhu Xian Hui , Huang Hui , Guo Hua , Yu Yi Qing , Xu Xi Peng
Published: September 2014

Fixed-abrasive wires, such as electroplated diamond wires and resinoid diamond wires, employed for slicing ingots have the problems of high tool wear. A novel brazed diamond wire has been developed to overcome these problems. This paper investigates the effect of process parameters, including brazing temperature, brazing time and brazing filler composition, on the brazed diamond wire manufacturing with CuSnTi brazing filler. The 3D micro-video system was used to observe the brazed diamond wire surface. Tensile, bending and torsional test were carried out to evaluate the mechanical properties of brazed diamond wire. A brazed diamond wire with 3km length was fabricated with the optimization process parameters, which was successfully used to slice glass.
Wire-EDM Properties of EC-PCD Made up of Boron Doped Diamond Particles
Authors: Chen William , Ninomiya Shinichi , Nochi Shunsuke , Iwai Manabu , Suzuki Kiyoshi
Published: September 2014

It has been made clear that the EC-PCD composed of boron doped diamond particles improves the performance in the die sinking EDM and wire EDM in comparison with the existing standard PCD (S-PCD). However, the effect of the property improvement could not been evaluated quantitatively in the research reports in the past. Therefore, in this study, wire EDM cutting tests were conducted on the specimens of S-PCD and EC-PCD, in addition to the evaluation of cutting efficiency and cutting PCD surface, a detailed investigation of the cut surface properties of the PCD has been performed under the color 3D laser scanning microscope. In order to investigate effects of a grain size of the source diamond, EDM cutting experiments were conducted on the EC-PCD specimens of 4 different grain sizes. As a result, it was found that the cutting speed was higher in the case of EC-PCD than the case of S-PCD, e.g., by 20% and 40% respectively in the sample of 10μm and 25μm particle size. Also, in the case of the cut S-PCD surface, a groove due to the discharge is formed in the boundary of the tungsten carbide layer and the PCD layer. However, in the case of the cut EC-PCD surface, the groove did not appear in the boundary.
External Magnetic Field Control during EDM of a Permanent Magnet
Authors: Takezawa Hideki , Yokote Nobuhiro , Mohri Naotake
Published: September 2014

The effect of changes in the magnetic field on the magnetic flux density during the electrical discharge machining (EDM) of a permanent magnet is reported. During EDM of the permanent magnet, a second magnet for the external magnetic field was set up, and the internal temperature and surface magnetic flux density on the opposite surface of the permanent magnet during machining were evaluated. It was found that even though the internal temperature of the magnet remained unchanged, the surface magnetic flux density changed when the external magnetic field was varied. In addition, the magnetic field generated by the magnet changed when a plate with high permeability was pressed onto the surface of the permanent magnet.
Modeling and Analysis of Micro Piezoelectric Vibration Energy Harvesters Based on the Theory of Strain Gradient
Authors: Cui Xing Ke , Huo Rui , Li Shu Ying , Liu Cui Ping , Zhang Dao Kun
Published: September 2014

The dynamic model of micro piezoelectric vibration energy harvesters is established using the theory of strain gradient, the model reflects the effect of the scale of the micro system.The expression of the output voltage is gotten through solving the model, and then the parameters are simulated, the results of simulation accord with the experimental data
Stability Analysis of Surrounding Rocks of Underground Powerhouse in a Hydropower Station
Authors: Hu Jun , Yu Xiao Peng
Published: September 2014

The underground powerhouse of a hydropower station is a typical large-span and high side wall cavern group. The stability analysis of high side wall and the rock between caverns is key for cavern design. Based on the process of excavation and anchorage of underground caverns, FLAC3D numerical modeling technique is used to dynamically analyze the distribution rules and variation features of the second stress field, displacement field plastic zones in the rock masses surrounding the caverns before construction of anchorage support and the loads carried by the supporting structures. The computation result shows that the opening's lay out, construction sequence and support parameters are rational.
Experimental Study on Anti-Penetration Performance of Steel Fiber Reinforced Polymer-Modified Concrete
Authors: Cao Hai , Zhang Xin Le , Guo Xiao Hui , Feng Jin Ji
Published: September 2014

Adding polymer emulsion to concrete can increase the bonding strength at the interface of steel fiber and matrix and the property of matrix is improved. Tensile strength, bending strength, deformation and toughness of the concrete are also increased. Anti-penetration performance of steel fiber reinforced concrete (SFRC), polymer-modified concrete (PMC) and steel fiber reinforced polymer-modified concrete (SFRPMC) are studied in this paper. Experiment was conducted by launching steel projectiles into concrete targets, and damage distributions of concrete after penetration are obtained. The results showed the anti-penetration performance of steel fiber concrete by adding polymer can be increased obviously.
Analysis of the Heavy Traffic Impact on the Life of Asphalt Concrete Pavement
Authors: Tang Pei Pei , Shen Ai Qin , Gao Meng Bo
Published: September 2014

With China's rapid economic development, traffic and heavy-duty vehicles increased significantly. Asphalt pavement failure caused by heavy traffic is increasingly prominent.Pavement's service life was greatly reduced. On the basis of extensive research and theoretical calculation the article analyzes the impact of heavy traffic on the asphalt pavement service life from three aspects of rutting,ultimate failure and fatigue failure, provides a theoretical basis for heavy traffic asphalt pavement structure design.
Accuracy Analysis of Gear Root Strain Test under Different Rotational Speed
Authors: Zhu Hao , Hu Yu Mei , Shao Yi Min
Published: September 2014

Involute helical gears, with advantages of large carrying capacity, smooth transmission and long life, etc., are widely used in automotive, mining, helicopters and other high-speed and heavy-load transmission system. Poor working conditions lead to fatigue crack and other faults of gear key parts such as tooth root and tooth face. To identify the root causes of gear faults, strain monitoring methods are often used to monitor the stress changes of gear key parts so as to work out individualized improvement plants. Good test results can be obtained using real-time wireless data collection technology when the gear is in low-speed and light loading condition, and we can get important data such as speed, torque and dynamic strain on tooth root, etc. However, involute helical gears tend to work in high-speed and heavy harsh conditions, especially when the gear speed reaches a large value (eg. 10000r/min above), gear strain measurement device will suffer big centrifugal force and the impact of shear force which may results partial bonded adhesive failure (cracks, erosion, etc.) and even whole peeling of strain gages, thus inaccurate and even error results will be obtained. Transient finite element analysis method is used in this paper to study the relationship between rotation velocity and test accuracy of strain gauge as well as the process of the bonded adhesive failure, which may provide effective guidance for the fault diagnoses of gear meshing.
An Implementation of a New Rearview Device on the Automobile
Authors: Zhou Bing Qiang , Liu Bo
Published: September 2014

A new automotive rearview device is to integrate sensor technology, data transfer and image formation principle, the original left/right rearview mirrors are removed, replaced by two high-resolition camera. walker, the car on both sides and the rear of the vehicle, the specific location of buildings, and the distance next to itself , can display clearly through the cockpit video , which provide a full & clear visual pictures to the driver, new rearview device instead of traditional reversing function of the mirror, benefit the driver a lot . The driver don’t move the head back and forth to watch the rearview mirror, just glance at the video installed on sun visor position , can have a all-directional observation around the car.
Modal Analysis of Marine Propeller Submerged in Fluid
Authors: Ren Hong , Li Fan Chun , Zhao Tian Yu
Published: September 2014

The present work is aimed to free vibration characteristics of marine propeller in fluid, and analyze the influence of fluid inertial effect on propeller. The fully coupled three dimensional finite element method is applied, and the commercial finite element code, ANSYS WORKBENCH, has been used to perform modal analysis for both wet and dry configurations via fluid-structure interaction APDL commands for secondary development. On this basis, analyze a marine propeller in air and in fluid with finite element analysis, then the differences of natural vibration frequencies and vibration modes of the propeller for different boundary conditions are discussed. In addition, the natural frequencies curves are presented. Results show that the natural frequencies of propeller in fluid are significantly lower than those in air, the fluid inertia effect also has some influences on vibration mode.
Multidisciplinary Optimization of Helicopter Gearbox Housing Structural Vibration Based on ARSM
Authors: Zhang Lin , Li Shu
Published: September 2014

A comprehensive numerical method to optimize a helicopter gearbox housing vibration characteristic is presented. Thicknesses of all the shells are considered to be design variables. The variables that have more effect to the responses than others are found by sensitivity analysis through orthogonal experiment, decreasing computational cost and improving the efficiency. An adaptive response surface method is applied to maximize the first-order natural frequency with the constraint of stress and mass to reduce structural vibration and satisfy strength and mass requirements at the same time, which is a multidisciplinary optimization problem. The results show that the maximum nodal displacement frequency response is lessened 58% and the maximum element stress is 29% less than the original housing structure.
The Encapsulation of Finite Element Analysis Process about Bogie’s Side Frame Based on EASA
Authors: Xie Huan , Zeng Wei
Published: September 2014

Taking into account the problem of plenty repeated works during the operation of engineering application software, the integrated solution of engineering application software based on EASA (the encapsulate tools of software) was proposed for improving the analysis efficiency and ensuring the analysis accuracy of software purpose. Then taking the strength analysis of bogie’s side frame as an example, the integrated analysis interface of strength analysis about side frame was established, realized the remote invocation based on Web, and the efficiency of engineering analysis was improved.
Determination of Maximum PV Integration Capacity for Distribution System
Authors: Hsieh Shih Chieh , Chen Chao Shun , Lin Chia Hung , Hsieh Wei Lin , Hsu Cheng Ting
Published: September 2014

This paper is aimed to determine the maximum penetration levels of solar photovoltaic (PV) systems in distribution feeders to fully utilize the solar energy for a cleaner environment by taking into account the mutual coupling effect between phase conductors. The equivalent circuit models for distribution line segments including the grounding effect and the mutual coupling between phase conductors and the grounded neutral line are applied in the computer simulation. A practical Taipower distribution feeder is selected for system analysis to study the maximum PV penetration with the proposed precise modelling of the feeder network.
Fine Description and Development Strategy of Fort Cooper Coal Measures in North Bowen Basin of Australia
Authors: Cui Ze Hong , Ren Bin , Xia Zhao Hui , Zhang Ming , Ding Wei , Liu Ling Li , Cao Shuang Zhen
Published: September 2014

Based on the analysis of coring, logging and experimental data, fine evaluation on Fort Copper Coal Measures (FCCM) of Early Permian Blackwater Group in north Bowen Basin of Australia has been done. FCCM is a potential coal measure. Eight coal seams exist in FCCM. Laterally, they develop steadily. Seams of FCCM characterize interbedding with partings, high ash content, high gas content and mediate-low permeability. The content of partings, which are groups of siltstone, mudstone and tuff, ranges from 15% to 55%. The cumulative thickness of pure coal ranges from 40 to 60 m. The ash content ranges from 20% to 70%, averaging 45%. Coal seams gas content is as high as 7% to 15%, benefitting from the dense rock block effect on the top and bottom, as well as the interplayers. The permeability ranges from 0.1 to 10 mD laterally. Parameters above show FCCM has good developing potential. Western slope of Nebo syncline is suggested as the favorable area, considering its good developing factors such as shallow buried depth of coal seams, relatively high permeability and effective gas preserve environment. Meanwhile, gas in partings can be considered in collaborative development strategy. Developing gas along with ash will be the focus of future development evaluation.
Research Progress and Obstacles in Development of HVDC
Authors: Chen Yuan Feng
Published: September 2014

The merits of HVDC,such as long-distance power transmission, less line lose,ability to transmit high-power and so on,were introduced. The obstacles in development of HVDC,including failure of commutation,hazards of higher harmonics,limitations of transmission direction, problems of insulation and so on,were analyzed. The research progress both at home and abroad in development of HVDC were summarized.At last,research and application prospects of HVDC were prospected briefly.
The Designation and Simulation of Amplifying and Shaping Circuit of SAW Gas Sensor Signal
Authors: Bai Xiao Tao , Zhang Tao , Liu Qiang , Zhang Bei Bei
Published: September 2014

In this paper, a kind of amplifying and shaping circuit was designed according to the characteristics of high frequency and small amplitude of surface acoustic wave (SAW) gas sensor signal. The circuit is applied to two-channel mixing detection method to solve the problem that backend devices cannot identify sensor signal. The whole circuit is simple in structure and has very good shaping effect on voltages signal of millivolt level, meeting the need of the sensor of gas detection.
The Method Analysis of Overhead Transmission Line Single-Phase Grounding Fault Detection and Location
Authors: Dai Yun Hong , Liang Shi Bin , Hu Ming Yao , Li Ying Na , Zhao Zhen Gang , Xie Tao , Tian Qing Sheng , Li Chuan
Published: September 2014

Small current grounding power system is widely used in overhead transmission line in medium voltage distribution network in China. Because of its long lines, branch, space truss structure is complex, low level of automation, It is easily influenced by outside force and the natural environment, and single-phase grounding failure rate is high. It is an important topic to quickly and accurately detect the location of the fault line, and improve the reliability of power supply and distribution system.This paper has carried on the induction and the comparison of various fault detection and location method of overhead transmission line which is currently used in single phase to ground, and analyzed their advantages and disadvantages,given the corresponding conclusions, provided the reference for finding out the reasonable single-phase earth fault location method or improvement.
The Research and Design of a Room-Temperature Nuclear Radiation CdZnTe Detector
Authors: Shen Min , Tang Zhi Ling
Published: September 2014

Cadmium zinc telluride (CZT) material is one of the preferred materials for the fabrication of X-ray and gamma-ray detector. In this paper, it is presented a room-temperature nuclear radiation detector system based on CZT material with planar electrode and ohmic-contact. The experimental validation and analysis of the designed system is carried out. At the same time, some research and design on the surface signal-readout method、the charge sensitive preamplifier circuit、pulse signal processing circuit and soft processing program is made. The signal from the CZT material exposed to the radiation through the experiment is successfully required. The signal from the experiment is correspondingly processed and validated. The potential factors that influence the detector performance are discussed. The conductive adhesive is the joint of the ohmic-contact electrode and the preamplifier circuitry. The preamplifier circuitry has high gain, rise time in the nanosecond level and little equivalent charge-noise. The research and experimental design base for the development of subsequent gamma spectrometer.
Chip Technology Based on High Efficiency DC Power Supply
Authors: Wang Hao , Chen Dian Ren
Published: September 2014

The switching power supply is the use of modern power electronics, by controlling the switching transistor turn-on and turn-off time ratio, maintaining a stable output voltage of the power supply. Switching power supply technology at the core, it is mainly divided into AC / DC and DC / DC two categories. Switching power supply eliminates bulky frequency transformers, replacing tens of kHz, MHz or even hundreds of kHz frequency transformer. Since the adjustment pipe work in the off state, and thus low power consumption and high efficiency.
Preparation and Mechanics Properties of the EP/ZnO Nanocomposites
Authors: Jiang Yong , Zeng Wen Fu , Ding Yan Huai , Yin Jiu Ren
Published: September 2014

The EP/ZnO nanocomposites were prepared by using epoxy resin as matrix, nanoZnO as the modifier, polyamide as curing agent. The surface morphology of nanoZnO was observed,the average particle diameter of nanoZnO is 20nm. Their mechanics properties were studied and the experiment results were analyzed. The results indicated that the compressive stress-strain curves of the nanocomposites had obvious three phases characters, i.e., linear elastic phase, plastic yield flat phase and compact phase. Along with the nanograins content of the nanocomposites increasing, the compressive elastic modulus and compressive strength of the nanocomposites augmented. When the nanograins content is 5% and the transfiguration speed is 10mm/min, the compressive elastic modulus and compressive strength of the nanocomposites respectively improved 36.4% and 48.9% comparing with their of the pure epoxy resin. At the same nanograins content, with the transfiguration speed increasing, their compressive strength added.
Control System Design Based on MSP430 Microcontroller
Authors: Ji Ling
Published: September 2014

Single-chip microcomputer MSP430F44 is the core control chip of the multifunction TIG welding controller, MCU is produced by TI and 16-bit flash type, the chip control system uses C430 language to modular software programming, coordination with other subroutines by the main program module , through a simple interface conditioning circuitry on a TIG welder can achieve a variety of welding processes, the welding flexible demand is satisfied. One of the most important module of the welding current waveform generator module, the welding waveform parameters are automatically generated by two way, one is the welding methods, the other is the welding parameters, then judge the input signal of the welding gun, when the gun is pressed, the corresponding waveform output; the welding current waveform output can be achieved using this software, is displayed on the welding current waveform generator.
Embedded Systems Based on Simple GPS Auto Navigation System
Authors: Wang Hao , Chen Dian Ren , Han Ze Yu
Published: September 2014

GPS (Global Positioning System) technology is the GPS car navigation technology with the rapid development of embedded technology, the automotive industry and the gradual rise of the market based on various types of GPS navigation products are more technically larger gap, a variety of GPS good and bad, regardless of the quality of the product. This paper analyzes the current status of the development of domestic and foreign car navigation systems, GPS car navigation system for the discussion in order to build a $ 3C2440 embedded development board as the core hardware system, built with WinCE platform for car navigation software for the system, using EVC (Embedded Visual C++) and eSuperMap software tools designed to be able to search the electronic navigation maps for route intelligent navigation software system.
Study on Online Monitoring System of Power Transformer
Authors: Wu Min , Pu Hai
Published: September 2014

This paper puts forward an on-line monitoring system of power transformer which could online collect multiple physical parameters of power transformer at the same time without using electricity sensor. In this case, the sensor will not affected by the strong electric field, magnetic field and electromagnetic wave. The system analysis the running state of power transformer according to physical parameters accurately, as current technology can only measure single physical parameters, it can solve this problem that the measurement results lack of association. Moreover, the system improves the reliability of power transformer operation and security of online measurement, ensuring the safe operation of power system.
Modeling and Simulation of the Helicopter Control System Based on the Flight Qualities
Authors: Jian Cheng Wen , Li Shu , Zhang Ji
Published: September 2014

Helicopter is a strong coupling and instability nonlinear system, of which the inherent flight qualities are poor. Helicopter model following control technology can make four control channels of helicopter with excellent tracking and decoupling characteristics. This paper applied the control method of model following control combining eigenststructure assignment to the helicopter control system. The results of simulation show that the helicopter flight qualities meet the requirements of ADS-33, the helicopter has excellent tracking and decoupling characteristics. Thus it proves that this control method is of great effectiveness.
Research of Greenhouse Environment Monitoring System
Authors: Wang Chao , Ma Jian
Published: September 2014

With the rapid development of Wireless Sensor Networks (WSN) and embedded technique, especially the widely application of Internet of Things technology, more and more attention has been paid in greenhouse monitor field. The aims design of system depends significantly on the application, and it must consider factors such as temperature, humidity, light intensity, co2 concentration and other environmental factors. These sensors are equipped with wireless interfaces with which they can communicate with one another to form a network. All the environment factor information gathers by PC and embedded device, and people also can control them through Graphical User Interface (GUI).
Research on Multi-Functional Weak Current Real-Time Detection of Gas Corrosion Sensor
Authors: Shi Ye Qing , Mu Ping An , Dai Shu Guang , Xu Tian Ming
Published: September 2014

At present, the detection of weak corrosion current is not perfect and automated, to solve the problem, this paper put forward and designed a kind of weak and wide-range corrosion current real-time detection circuit with functions of automatic switching range . By choosing low bias current and high precision operational amplifier, using I - V conversion technology transform the weak current into voltage, then do voltage signal acquisition, using the SD card module and electronic analog switch combined with single chip microcomputer to realize real-time and auto-switching detection of the corrosion current. This circuit has good real-time performance and accuracy, and can achieve the corrosion current value that was outputted by gas corrosion sensor well.
The Design of PLC Control of Multi Degree of Freedom Landscape Showcase
Authors: Liu An , Wei Jing Tao
Published: September 2014

In order to make the different angles of the viewers get the best visual effects, the paper proposed a lift tilt rotary landscape showcase which can show all kinds with multi-degree of freedom. Showcase uses the electric motor to drive and PLC applications in the system which can be programmed to control various types of mechanical components, to achieve the function of lifting and descending of 4 position, 8 position, and 12 position, horizontal lift and rotating in 360-degree. The test and operation results demonstrate that the showcase meets the specific functional demand of design.
The Research of Embedded System in Industrial Control
Authors: Yin Jin Guang , Zhang Zhi Qiang
Published: September 2014

The degree of automation of industrial control has been improved by the development of embedded systems.This paper conducts analysis and comparison of the VxWorks operating system RTLinux, and gives a preview of the development trend of industrial embedded systems finally, through the analysis of the characteristics of industrial control system and its special requirements for embedded software and hardware,which focus on the arm series processor,and.
A Review of Path Planning Method for Mobile Robot
Authors: Wu Zong Sheng , Fu Wei Ping
Published: September 2014

The ability of a mobile robot to plan its path is the key task in the field of robotics, which is to find a shortest, collision free, optimal path in the various scenes. In this paper, different existing path planning methods are presented, and classified as: geometric construction method, artificial intelligent path planning method, grid method, and artificial potential field method. This paper briefly introduces the basic ideas of the four methods and compares them. Some challenging topics are presented based on the reviewed papers.
A Parallel Genetic Algorithm Based on OpenCL in Resolving 0/1 Knapsack Problems
Authors: Chang Long , Shi Lin
Published: September 2014

This paper mainly focused on 0/1 knapsack problems based on the genetic algorithm (GA). According to characteristics of the individual independence in GA, a parallel segmentation method was presented using the OpenCL technology in resolving the 0/1 knapsack problems. Moreover, the local memory was partially optimized in the statistical operation of GA. Experiment results in comparing serial and parallel algorithm implementations showed that the parallel algorithm implementation was operative and the execution time of the parallel algorithm implementation increased linearly according to the increment of problem scale. By comparing the execution time of implementations on CPU and GPU under various individuals and iterations conditions, the effects on CPU and GPU of this method were also analyzed.
A Rate of 4kbps Vocoder Based on MELP
Authors: Ming Yan , Wang Li Zhen , Xia Xu Jiu
Published: September 2014

A 4kbps vocoder based on MELP is presented in this paper. It uses the parameter encoding and mixed excitation technology to ensure the quality of speech. Through adopting the scalar quantization of Line Spectrum Frequency (LSF), the algorithm reduces the storage and computational complexity. Meanwhile, 4kbps vocoder adds a new frame type-transition frame. The classifier can reduce the U/V decision errors and avoid excessive switching between voiced frame and unvoiced frame. A modified bit allocation table is introduced and the PESQ-MOS and coding time test shows that the synthetic speech quality has been improved and reached the quality of communication.
An Improved K-Means Algorithm Based on Density in the Selfish Behavior Detection
Authors: Hu Yu Jie , Mao Jian Lin , Guo Ning , Chen Bo , Qiao Guan Hua
Published: September 2014

Aiming at selfish nodes in wireless sensor network (WSN) competition Shared channel unfair use of channel resources, for the purpose of selfish node Detection, puts forward an Improved Clustering Method (Improved Density-based Clustering Detection Method, ID-BCDM).With an average transmission delay, average throughput of node link sequence and collision probability of network performance characteristics, add the density function, improved K-means algorithm was carried out on the characteristics of sequence analysis and clustering. The simulation test results show that the ID-BCDM on three dimensional feature space has good clustering effect, also able to complete detection of single and multiple selfish node.
An Intrusion Detection Method Based on Shuffle Frog Leaping Algorithm
Authors: Yang Huai De , Li Yong
Published: September 2014

This paper presents an intrusion detection model based on shuffled frog leaping algorithm, the model search speed, high accuracy based on shuffled frog leaping algorithm, using the shuffled frog leaping algorithm generates a set of classification rules from the KDD99 data network audit data collection, quality and the use of objective function shuffled frog leaping algorithm to control the production rule, and then application of the rule of dynamically generated to rule based intrusion detection system, achieve the purpose of detection. The experimental results show that, this method of detection rules generation based on shuffled frog leaping algorithm, can significantly improve quality of generation rules, reduce the rules of intrusion detection system based on the false negative rate.
Communication Fault Recovery Technology Research in IntelliGrid
Authors: Yu Hai , Yu Yue , Yao Qi Gui , Deng Hui , Shen Wen
Published: September 2014

Analysis and comparison of the communication failure of IntelliGrid architecture alternative recovery technology, and points out that SCTP is capable of providing communication service restoration protocols at the transport layer, based on analysis of the characteristics of SCTP and analyze the characteristics of SCTP and TCP protocol, the method of network simulation research of the network link failure disconnected, network level fault tolerance mechanism of SCTP multihoming path switching characteristics based on, and for the lack of SCTP multihoming path switching method, put forward a kind of improved SCTP multihoming path switching method, through the simulation verifies the effectiveness of the application of this method in multi router network model, laid the foundation for the application of SCTP for power system.
Embedded Video System-Based Motion-Adaptive De-Interlacing Algorithm
Authors: Li Ying , Nie Miao , Zhou Rui
Published: September 2014

An modified motion-adaptive de-interlacing algorithm was proposed in view of defects of traditional motion-adaptive de-interlacing algorithm in the aspects of motion detection and adaptive interpolation.Bipolar consecutive four fields was exploited to design criterion of motion state which improved the accuracy of the motion detection.Field insertion algorithm was exploited for interpolation of the static region which could increase vertical resolution of the image.Traditional ELA algorithm was modified by multi-directional edge detection for the interpolation of the motion region which could increase the function of horizontal edge detection and enhance the level of consistency edge direction estimation.Experimental results show that the proposed de-interlacing algorithm improves Peak Signal-to-Noise Ratio (PSNR) and restrains the artifacts such as saw-tooth,interline flicker,motion virtual image.
Integrity Detection of Automatic Assembly for Lamp Parts Based on Color and Shape Feature
Authors: Wu Pei Pei , Mu Ping An , Dai Shu Guang
Published: September 2014

In industrial production, the machine vision save a lot of manpower and material resources. And it has become an indispensable part of quality control solutions in automobile and parts manufacturing. In order to detect the integrity of automatic assembly for lamp parts, we first use the shape feature to determine whether the part shape is right through egde detection and template matching algorithms. And if the shape is right, we can further detect the color feature which are different in different sales regions using the color moments. As a result, the missing and mistake packing can be detected.
Research and Application of the Improved DST New Method Based on Fuzzy Consistent Matrix and the Weighted Average
Authors: Xu Wei Xiao , Tan Ji Wen , Zhan Hong
Published: September 2014

Aiming at the existing defects of evidence dempster-shafer theory (DST) in dealing with high conflict evidence, we proposed a new method to improve DST. By introducing concept of fuzzy consistent matrix, calculate the weights of factors, and put different sources of evidence into distinguish, and finally cast more than one vote to prevent the phenomenon, the average convergence of evidence. What’s more, the improved DST new method is applied to the rolling bearing fault diagnosis of CNC machine workbench .The test results show that the improved new synthetic formula increases the accuracy of fault diagnosis Ball, the conflict of evidence synthesis results better, to achieve better results.
Research on Fast Face Detection Algorithm in Complex Background
Authors: Wang Xin , Pan He
Published: September 2014

This paper presents a fast algorithm for face detection in complex background, in which image color information is used first, project upper part of the partition of face in the gray image to horizontal and vertical direction. Determine the eyes positions by the minimum value, and scope the human eye in the face of prior knowledge to judge and adjust the face region.
Research on Technological Innovation of Honeypot
Authors: Zhao Jun , Dong Li Qiang , Yang Mu Shun , Guo Ya , Zhuang Xian Zhen
Published: September 2014

Honeypot is a kind of active safety technology. New honeypot system is built, operating system camouflage,camouflage IP address, the routing camouflage, high-interactive services camouflage, camouflage vulnerability etc are realized in this system by protocol processor, ARP agent and data redirection etc. Keywords: Honeypot; IP address; ARP agent
Study of Face Feature Extraction and Recognition Techniques Based on Wavelet Analysis
Authors: Wang Xin , Pan He
Published: September 2014

Face recognition is a research hotspot of pattern recognition and artificial intelligence. This paper presents a method of extract face feature based on Wavelet. First, reduce vector dimension by wavelet decomposition of the image, second, train the multi class support vector machine (SVM) model by face feature vector extracted and make face recognition finally. The experiments on ORL face image database of the algorithm shows the superiority of the proposed algorithm in terms of recognition performance.
The Fault Diagnosis Model of Beer Fermentation Process Based on Kernel Principal Component Analysis for Constant Value Detection
Authors: Lv Ning , Bai Guang Yuan , Yan Lu Qi , Fu Yuan Jian
Published: September 2014

In order to overcome the application limitations of principal component analysis fault diagnose model in non-linear time-varying and reduce computational complexity for process monitoring based on non-linear principal component, we introduced kernel transformation theory of nonlinear space to extract data feature extraction and a fault monitoring model based on kernel principal component analysis (KPCA) for constant value detection was proposed. Through the proper selection of kernel function parameter values, the KPCA model can achieve constant value of process fault detection and has lower computational complexity than other non-linear algorithms. The fault detection experiment for beer fermentation process shows that this method is able to detect process faults in a timely manner and has good real-time performance and accuracy in the batch process of slowly time-varying.
The Offshore Wave Simulation Based on the Improved P-M Spectrum and Multiple Fractal Interpolation
Authors: Li Ying , Zhou Rui , Li Hao Kuan , Wang Ming
Published: September 2014

The Pierson - Moskowitz model is only applicable to full growth state of the waves, and it has low authenticity and hopping phenomenon under the condition of offshore shallow water. This paper proposes a simulation model of offshore wave based on the improved P-M spectrum and multiple fractal interpolation methods. In order to calculate the sea wave with shallow water, a spectrum peak regulation factor and a depth of the water factor are introduced to the P - M spectrum model. Based on this model, the wavelength and wave speed are used as the initial values of wave height. Then, the amplitude and the number of iterations in diamond square fractal method are controlled to obtain the fractal static sea. In order to reduce the influence of the hopping phenomenon to the simulation authenticity, meanwhile, a multiple dynamic non-uniform interpolation method is proposed. The experimental results show that the proposed model can simulate offshore wave with better effect and in real time.
The Real-Time Fault Analysis of Personal Escape Suit Based on the Object Oriented Model
Authors: Tang Yao , Hu Pei , Hao Qian , Fang Shan Yi , Xing Shi Long
Published: September 2014

According the actual equipment support demand of rapidly floating escape suit, this paper built the object oriented fault tree model for the rapidly floating escape suit, detailed descried the planning and realization method of the fault detection and analysis system with actual examples.
The Research of Leather Image Segmentation Using Texture Analysis Techniques
Authors: Chen Hong
Published: September 2014

The leather productions are produced rapidly in people’s living, the productions’ quality is required stricter. Leather must be detected include leather plainness; leather surface defects and the density of leather before they are produced to be productions.. The most important aspect is the surface defects; the defects’ location, size and quantity should be confirmed. One of the most important steps of leather defects detection is leather image segmentation so as to extract leather defects. Gray level co-occurrence matrix is used to extract a lot of leather surface texture feature, the method of optimized Fuzzy C-means is used to segment leather image in the article. The optimized Fuzzy C-means add the spatial information; the precision of segmentation is improved. The image needs to be treated use morphological approach after it is segmented. As a result, the defective areas are separated from non-defective areas successfully.
Utilization of Satellite Monitoring for Maintenance Decision Making
Authors: Pavlů Jindřich , Aleš Zdeněk , Jurča Vladimír , Pexa Martin , Valášek Petr
Published: September 2014

Properly performed preventive maintenance is one of the basic conditions for ensuring the operability of the mobile machines. The authors proposed new method of using the modern technology of Global Positioning System and General Packet Radio Services, in order to make proper maintenance decision making and furthermore to reduce costs of preventive maintenance.
University Data Center Security System Design
Authors: Shan Jie , Yu Cui Yuan
Published: September 2014

Universities data center integrates each application system of teaching and core business data,Along with the education informatization construction in our country to further,data center as the hub of digital campus, operational pressure is more and more big.How to protect the security and stability of university data center is an important issue currently building college information.From the architecture of universities data center,this paper analyzed by building a comprehensive security system of multiple elements, to ensure data center security,efficient and stable operation.
Design and Realization of a Distributed Big Data Management System
Authors: Chen Hai Yan
Published: September 2014

Big Data provides a possibility of handling mass data, which acts as a subversive technique. By the way, traditional relation database is no more effective of mass data that causes distributed database NoSQL to appear and evolve. In this article, we will design and realize a new distributed big data management system (DBDMS), which is based on Hadoop and NoSQL techniques, and it provides big data real-time collection, search and permanent storage. Proved by some experiment, DBDMS can enhance the processing capacity of mass data, very suitable for mass log backup and retrieval, mass network packet grab and analyze, and etc. other applied areas.
Analysis of the Construction of New Metro Impact on the Existing Subway Station
Authors: Miao Sheng Jun , Huang Guan Lin , Chen Fei , Shi Li Chao
Published: September 2014

Taking a new subway going through under the existing subway station as the engineering background, based on geological exploration data in the field, the deformation influence for the station structure of the existing subway when the main structure station constructs could be studied. It constructed a three dimensional calculation model by Ansys software to simulate the transverse and vertical deformation and the stress variation of new building line station's main structure, Through the analysis of the results,it put forward the predictive analysis to control the risk. To ensure the safety in construction process through adjust the construction scheme timely. It provided the corresponding reference for the such subway building project.
Design Concept and Research on Long-Life Pavement
Authors: Tang Pei Pei , Gao Meng Bo
Published: September 2014

According to the present situation of short service life of high grade highway the domestic gradually developed the design and study of long-life pavement in order to improve the operational performance of the road and extend the use fixed number of year. This paper discusses the design concept of long-life pavement and also analyzes the present situation of permanent road in the Europe, the United States and other countries.The paper proposes the domestic design research direction of long-life pavement to control the early destruction of the pavement structure and improve the road performance.
Network Design of Park-and-Ride System to Promote Transit Patronage
Authors: Chen Xin Yuan , Liu Zhi Yuan , Deng Wei
Published: September 2014

This paper proposed a bi-level programming model to optimize the locations and capacity for rail-based park-and-ride sites to promote transit patronage. A multinomial logit model was incorporated in a mode split/traffic assignment model to assess any given park-and-ride scheme. This model was then taken as the lower level model, and the upper level programming model is established to optimize the location and capacity of park-and-ride with the goal of promoting transit patronage. A heuristic tabu search algorithm is then adopted to solve this model.
On Study of Driver’s Shoulder Fatigue in Manual and Automatic on Grassland Highway
Authors: Chen Xiao Jing , Qi Chun Hua , Zhu Shou Lin , Gao Ming Xing , Yang Feng
Published: September 2014

On the grassland highway, the driver is prone to muscle fatigue because of the particularity of its landscape and the linear structure. And vehicle operating system leads to different degree of muscle fatigue. In order to explore the pilot fatigue characteristics in grassland under different operation conversion highway, put forward the fatigue improve measures and improving the quality of driving, I use the real driving test. In this paper, we study the manual and automatic driver’s shoulder muscle fatigue with method of frequency domain analysis through testing the driver, obtaining MF of trapezius muscle in static measurement and the surface electronical signal of the trapezius muscle after 110 minutes’ driving. We devide the drivers into 2 groups (5 drivers in manual group, 5 drivers in automatic group). The results show that the automatic driver’s MF has significantly negative correlation (P =- 0.521) before and after the static test, which suggests automatic driver will be afflicted with shoulder muscle fatigue; The manual drive’s MF before and after the test tends to decrease with time (SlopeMS =- 0.0076, SlopeMD =- 0.0582), which suggests that after test, drivers in manual group are in the right shoulder fatigue, and before test, the decline of MF shows the drivers’ fatigue accumulation. After test, MF of manual and automatic group increases (SlopeAD =- 0.01, SlopeMD =- 0.058), which shows that driving on grassland highway can lead to the driver’s muscle fatigue with the extension of time; and vehicle operating system leads to different degree of muscle fatigue.
Predict the Volume of Passenger Transport of Railway Based on Grey Markov Chain Model
Authors: Li Ying
Published: September 2014

Combined with grey model and the characteristics of the Markov chain, based on the grey prediction model, calculating the state transition probability, grey Markov chain model is established. The results show that the grey Markov chain model has higher prediction accuracy than GM (1, 1) model, can offer references for passenger flow organization.