bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Build of a Nine-Axis Digital Output Gyroscope-Based Percutaneous Puncture Ultrasonic Navigation System
Authors: Zhou Xuan , Zhang Chi Min , Xu Tian , Sun Yi Xin , Fu Jian
Published: February 2014

In this work we reported the design and build of a nine-axis digital output gyroscope-based percutaneous puncture ultrasonic navigation system. The proposed system includes three types of sensing elements: three-axis gyroscopes, three-axis accelerometers and three-axis magneto-resistivemagnetometers. Gyroscopes are used to measure the absolute angular rate of the carrier. Theaccelerometers are used to determine the initial attitude of system and to correct for gyroscope drift in the tilt angles (pitch, roll) determination. The magnetometers are used to determine the initial alignment in heading and to correct for gyroscope drift in the heading. The nine-axis digital output gyroscope combined with ultrasound probe can accurately collect triaxial angle changes of the ultrasound probe, Then guide the orientation of the puncture needle in the ultrasonic navigationpercutaneous puncture. The system can increase puncture accuracy.
Application of Siemens S7-300 PLC in the Thermal Power Plant Flue Gas Desulfurization Control System
Authors: Ju Mei Long , Zhai Xiu Qin , Zhang Qing
Published: February 2014

According to the characteristics of Wet Flue Gas Desulphurization (FGD), this paper brings forward the automatic control requirements and the control methods. The automatic control system is composed of a Programmable Logic Controller (PLC) and an industrial control computer (PC). The automatic control system can monitor the operating parameters of FGD system automatically and conduct automatic control and adjustment to FGD system. The PLC is responsible for the data collection and automatic control, while the PC is responsible for the surveillance of FGD system operation and the data processing through mutual communications between PC and PLC, which realizes the communication between human and machine and ensures the safe, stable and economic operation of the FGD system.
An Efficient Micro-Payment Protocol Based on a Single Hash Chain
Authors: Li Guo Juan , Wang Hai Bin , Chai Xu Guang
Published: February 2014

Micro-payments are very small sums of money, typically used to pay for content access or for small quantities of network resources. However, the existing micro-payments have the following drawbacks: firstly, generated e-coins only connecting with one particular merchant; secondly, only one unit value or one kind of currency is provided; and thirdly, needs multiple hash chain. In this paper, we constructed an efficient micro-payment protocol based single hash chain. The user only generates a hash chain to do business with multiple merchants. Using the hash value of monetary value generated by the broker, the user can spend different monetary value by a hash chain.
Server Design of Personal Cloud Sync Storage System
Authors: Jiang Bing , Li Li Fang , Xue Xiao Qing , Zhang Fu
Published: February 2014

This paper introduces the server design of a personal cloud sync storage system based on Android mobile terminal, including system architecture, workflow and module design. According to the application characteristics of personal cloud, this thesis selects Servlet as the core development technology of server-side system, describes the development process of the personal cloud server based on Tomcat container and establishes a secure connection between the mobile terminal and the personal cloud server center. Under the LAN environment, the server system has successfully completed the function module of the test and assembly verification test. Test results show that the whole system runs in good condition and has certain applicative value.
Research on Automatic Test Method of VMF Codecs
Authors: Wang Xuan , Luo Qiang Yi , Li Ling Ling
Published: February 2014

Test of VMF Codecs aims to find errors. This paper proposes an automatic test method of VMF codecs, the method use VMF Data Element Dictionary as the input data. Firstly the test process is designed for pack & unpack functions using legal and illegal test cases, then discusses the test cases suitable for automatic generation, and proposes an automatic test case generation method, the method consists of such steps: design of VMF Data Element Dictionary, message format analysis, generation of message storage struct, generation of message pack & unpack function, generation of legal test case and illegal test case. Lastly this method has been implemented and test experiments are taken, the results show that this method is feasible and effective.
Enhancement of Test Platform for Web Application Security
Authors: Sun Yi , Liang Dong Yun , Wang Wen Jie
Published: February 2014

Web application has been widely used. So it is urgent to test the security of Web application efficiently to resist various attacks. In this paper, key technologies (detecting framework with plugin, discovering unknown vulnerability and building detection tools integrated by user-defined) are absolutely researched. No matter Web application is running or not, the platform can be dramatically able to discover the vulnerability efficiently to insure their security.
Trusted Control Flow Integrity for JVM-Based Application
Authors: Mei Song Zhu , Ba Hai He , Ren Jiang Chun , Wang Zhi Ying , Ma Jun
Published: February 2014

This paper gives out a novel way, TCFI4J, to enforce the control flow integrity to the Java applications based on Java virtual machine. TCFI4J combines the trusted computing technology and Java virtual machine together. It takes full advantage of the Trusted Platform Module (TPM) and gives full consideration to the memory organization of the JVM. TCFI4J takes the integrity of part of JVMs memory image into account for the control flow integrity enforcement. The method presented in this paper can provide the user information about an applications behavior. It can significantly improve the security of a Java application with a tolerable performance impact.
Research of Communication Method of Intelligent Building Lighting System Based on CAN Bus
Authors: Hu Shan , Tian Li Guo , Cheng Xiao Liang , Li Meng
Published: February 2014

This paper proposes an intelligent lighting control system based on CAN. Compared with the traditional lighting control system, it overcomes the effect of relatively scattered control and disadvantages of poor management, poor real-time and low degree of automation. In explaining the overall design of intelligent lighting system framework and communication protocols based on CAN bus communication, it analyzes the real time capability and puts forward the optimization scheme. It also proposes an implementation of SJA1000 CAN communication modules to achieve application to intelligent lighting system.
Software Implementation of Kompella-Based L2VPN
Authors: Wang Wei , Li Chang Shi
Published: February 2014

MPLS L2VPN is used to transparently pass users’ L2 data through MPLS network, with the common implementation model of Martini L2VPN by using LDP as the signaling. In spite of its wide application, the configuration of its capacity expansion is cumbersome and the cross-domain problem is insolvable. Therefore, based on the label swapping technology of MPLS, this paper adopts kompella-based approach for L2VPN implementation and mainly focuses on packet forwarding and controlling. Firstly, it does not make direct CE connections, but partitions different VPN in the whole SP (Service Provider) and gives serial numbers of CE within the VPN. Moreover, it also establishes the VC (virtual circuit) channel between the two PE and uses label distribution and calculation for mutual information. In this respect, it can not only provide effective supports for capacity expansion, but also solves the cross-domain problem.
The Influence of Implantable Actuators on Residual Hearing: A Computational Study
Authors: Liu Hou Guang , Xue Lian , Cheng Gang , Cheng Zhi Hong
Published: February 2014

Several types of middle ear implants have been invented as an alternative to conventional hearing aids for the rehabilitation of sensorineural hearing loss. To study the effect of the implanted site of their actuators on human residual hearing, a human middle ear finite element model was constructed. This model was build based on a complete set of computerized tomography section images of a healthy volunteers left ear by reverse engineering technology. The result shows that the tympanic membrane driving actuator and the incus long process driving actuator produce mass loading effect prominently at high frequencies. Whereas, the incus body driving actuator generates adverse effect on residual hearing mainly at low frequencies.
Dynamic Estimation of Water Hyacinth Area by Fusing Data from Satellite and GPS Sensors
Authors: Sun Ling , Zhu Ze Sheng
Published: February 2014

The interaction of water hyacinth area with growth is known to be strongly influenced by area size, but little is known about the interdependent role that size and time have on dynamic estimation of water hyacinth area. We report on the fusion of specially designed, satellite and GPS sensor data into area growth model as a function of area and time. We employ a multi-sensor fusion technique that is able to generate uniform data of fitting area growth model with complete control of area and time. Evidence of an overall Goodness of Fit Index of 0.9753 was obtained by using conventional statistic analysis. These findings suggest that the multi-sensor fusion technique readily supports area growth model development with highly resolution. Moreover, it was found that area growth model enjoy an appreciable advantage when it comes to harvesting water hyacinth.
Study on the Conductivity of DMEM by PASCO Sensors
Authors: Shan Peng Fei , Tao Xi Sheng , Xie Hu , Gui Rong , Ding Ru Niu , Chen Jian Jun
Published: February 2014

The fusion solution is a significant factor for the effect of the cell electrofusion, traditional buffer solution is different from the cell culture solution, researchers would spend lots of time and money to move the cells from the culture solution (DMEM) into the fusion buffer. The aim of this study is to explore a new formula on the basis of DMEM solution instead of Zimmerman solution. Theoretically its feasible to instead of fusion solution when the ratio of DMEM solution and water is less than 9:500.
Mechanical Properties and Microstructure Analysis of Aluminum and Steel Dissimilar Material Weld Joint
Authors: Chen Jian Bing , Peng Chi , Cheng Dong Hai , Cheng Dong Xu , Chen Yi Ping
Published: February 2014

LF16 aluminum alloy and Q235 steel were brazed by Zn-Al solder and the Al-Si-Cu solder. Metallographic microscope and scanning electron microscope were used to observe the microstructure of weld joint. The result shows that the strength of the joints, which were welded with Zn-Al solder reached 133.6Mpa. Zn-rich solid solution phase and Al-rich solid solution phase existed in Zn-based solder brazing seam. The Fe element trend was gradual changed, while Al element trended more gently, and generated Fe2Al5 intermetallic compounds in the joints in both the brazing joint of Zn-based and Al-based solder.
Tuning Characteristics of DFB Diode Laser and its Application to TDLAS Gas Sensor Design
Authors: Lu Rong Jun , Shen De Ming , Du Qian Qian , Huang Bao Zhen , Shi Jian Shu
Published: February 2014

Static and dynamic tuning characteristics of Distribute Feedback (DFB) diode lasers are investigated with practical laser devices. These characteristics are the basic guidelines for practical TDLAS sensors design. Static tuning characteristics help to select suitable diode lasers from limited available laser devices with specific wavelength and to set an appropriate working current and temperature. Dynamic tuning characteristics decide the sweep speed of current slope in both direct absorb Spectroscopy (DAS) and wavelength modulation Spectroscopy (WMS). Because of nonlinearity in the relation between wavelength and tuning current, the measured spectral line position should be corrected by the dynamic characteristics. For WMS, current tuning efficient and IM/AM (Intense modulation/Amplitude modulation) differential phase could be utilized to optimize laser modulation and harmonic components demodulation.
Theoretical Modeling and Error Analysis for Reflection Structure Fiber Optical Current Transformer
Authors: Yuan Duan Lei , He Zhou , Wang Hai Yan , Yan Guang Chao
Published: February 2014

The optical structure and working principle of reflection structure fiber optical current sensor was presented, the Jones matrix of Polarizer, wave plate, fiber optical sensor head, theoretical mathematical model of the reflection structure fiber optical current sensor were established. based on the theoretical mathematical model, the polarization error was simulation analyzed, the simulation result shown that to be improve the accuracy of fiber optical current transformer, it should be reduced the polarizer axis angle error, ensure the consistency of the phase modulation for the two beams light, the shaft angle of the wave plate should be controlled within 0°±2°,and phase delay should be controlled within 90°±3°, the influence of linear birefringence effects can be effectively restrained by using a large number of circular birefringence. The simulation results provide a theoretical basis for the realization of reflection structure fiber optical current sensor.
Acoustic Wave Resonance of Stimulated Brillouin Scattering in a Single Mode Fiber Ring
Authors: Zhang Xiao Min , Ci Yan Ke , Yao Jin Li
Published: February 2014

Fiber ring resonator is widely used to generate stimulated Brillouin scattering(SBS). In this paper, the resonant condition of the acoustic wave in the ring is discussed, and the condition of simultaneous resonance of multiple cascaded SBSs in a single mode fiber ring is analyzed.
Study on the Multi-Optical Theodolites Positioning Method Based on Function Restriction
Authors: Gong Zhi Hua , Duan Peng Wei , Xu Xu , Lv Hai Dong
Published: February 2014

Aiming at the shortcoming of the classical method of optical theodolite projection intersection named ́R ́ method and traditional data fusion method named point-by-point EMBET method, this paper advances the function restriction EMBET method which is based on multi-optical theodolites. Comparing with the three methods by simulation experiment, it demonstrates that the function restriction EMBET method has higher positioning accuracy and stronger practicability than two traditional methods. Furthermore, this method supplies the important reference value for engineering application.
Suppressing of Nonlinear Phase Noise in Dispersion Managed Quasi-Linear Transmission Systems
Authors: Chen Hai Tao , Liang You Cheng
Published: February 2014

Dispersion and nonlinear effect of fiber is the main factor limiting the performance of the long-haul and high speed optical transmission system. This paper focuses on the analysis and modeling of nonlinear phase noise in quasi-linear optical transmission system. The analytical expression for the nonlinear phase noise is obtained basing on the first order perturbation theory. And the numerical calculation of the nonlinear phase noise is deduced. The calculation results show that when the noise source and the end point of the system is equidistant from the optical phase conjugation (OPC), the nonlinear phase noise added by the optical amplifiers can be compensated by the OPC located after the optical amplifiers.
Research and Performance Analysis on Pedestrian Detection Based on Optimized Hog and SVM
Authors: Zhang Yan Xi , Feng Kai Ping
Published: February 2014

Pedestrian detection based on images is one key technology of intelligent vehicles, and it is also widely applied in intelligent robots, intelligent surveillance. This paper mainly focuses on implementing a pedestrian detection system, which is classified by linear SVM with optimized Hog (Histograms of Oriented Gradients) as the extracted features. Then some experiments were done to find out that how the changing resolution of training set, times of bootstrapping iterations and different size and steps of the sliding windows affect the overall performance of detecting systems.
Measuring Model Deformation with Project Moiré Interferometry Technique
Authors: Zhang Long , Yang Jian Jun , Zhang Jun
Published: February 2014

Project Moiré Interferometry system includes fringes projection system,image acquiring system and image processing system. Laser beam is changed to planar optical wave by expanded beam collimation system.The ideal grating is produced when planar optical wave passes through spatial light modulator. The emergence of light waves which include the information of grating are projected on the model surface.The fringes image modulated by the height of model surface is formed. The image is captured by image acquiring system to be processed.After the distortion brought by camera perspective transform is eliminated,the image is added with reference stripes.The Moiré fringes containing information of model surface can be obtained.Quantitative continuous data of model surface shape can be gained after fartherly image processing.
Experimental Study on Axial Tensile Performance of Low Volume Fraction of Ternary Hybrid Fiber Reinforced Concrete
Authors: Zhou Bo Ru , Xia Dong Tao , Liu Xiang Kun
Published: February 2014

In order to acquire axial tensile stress-strain curve of HFRC, specimens of equal cross-sections with embedded screw and pasted with carbon fiber cloth in corresponding length were tested on closed-loop electro-hydraulic servo testing machine which a subsidiary rigid frame was attached to. The effect of fiber volume, steel fiber slenderness ratio, steel fiber type and active admixture on the tensile properties of HFRC with low volume fraction was studied. The results indicate that when total volume proportion is less than 1% the first crack strength and ultimate tensile strength of HFRC can increase more than 15% and about 40% , respectively, the difference of effect of arched steel fiber and crimped steel fiber on the tensile behavior is small. The tensile behavior of HFRC is the best with a combination of slenderness ratio of 80 and 47.1kg/m3 arched steel fiber, 2.6kg/m3 macro-polypropylene fiber and1.0kg/m3 dura fiber and 10% .
Research on the Impact of CNC Servo Dynamic Characteristic for the On-Line Detection Precision
Authors: Pian Cheng Rong , Zhang Qing , Wu Nan
Published: February 2014

CNC machine tools are widely used in precision machining and automation production. The on-line detection technology provides an efficient testing method for quality control in CNC machining process. And the CNC servo dynamic characteristic is an important factor affecting the accuracy of on-line detection. In order to study the effects of servo dynamic characteristic, CNC servo system mathematical model was set up, probe system error model was established based on probe measuring time sequence and on-line detection error model was built. The cylindrical feature measurement example shows that on-line detection accuracy is improved through the secondary trigger measurement method and the probe path planning.
The Quality Test of TOPCON NET-G3A GNSS Receiver
Authors: Jia Zhi Ge , Chen Zheng Song , Wang Di Jin , Liu Gang , Yu Peng Fei
Published: February 2014

This paper describes the content and process of comprehensive testing the TOPCON NET-G3A GNSS receivers, which includes five parts, such as general performance testing and internal noise level testing of receiver, stability testing of Antenna phase center, TEQC testing and repetition rate testing of long baseline of receivers. Meanwhile, data of GNSS receiver testing is calculated and analyzed. The testing results show that TOPCON NET-G3A receiver is a high-precision GNSS receiver and fully meets the requirements for the GNSS precision measurement.
A Novel Method to Dicing Anodically Bonded Silicon Glass MEMS Wafers Based on UV Laser Technique
Authors: Jing Zhi Sheng , Zhou Ze Long , Mei Chen , Su Xiang Yong , Yang Zhuo , Tao Yi
Published: February 2014

UV laser dicing has many advantages such as mechanical stress-free and dicing shape-free, but it is seldom used to dice multi-layer MEMS wafers because of the deposition of a lot of debris and heat affected zones around the dicing lines. In this paper, a novel UV laser dicing method for anodically bonded wafers is presented. The heat caused split of the bonded silicon and glass around the dicing line is prevented by fabricating recesses on either the glass wafer or the silicon wafer. The Finite Element Method (FEM) in the ANSYSTM software was utilized to analyze the temperature and thermal stress distributions during the dicing process. The thermal stress is minimized sharply due to the fabrication of the recesses beneath the dicing line. The thicknesses of the glass and silicon wafers are 500μm and 250μm, respectively. The anodically bonding temperature is 360oC, and the bonding voltage is 400V. Dicing experiments show that the huge thermal stress caused by the laser can split the originally bonded silicon from glass around the dicing line. After recesses are fabricated along the dicing line, no heat caused split happens. The experiment results are in a good agreement with the FEM simulation. Compared with other methods, this research can provide a more reliable, flexible and cheaper laser dicing process for thick anodically bonded silicon/glass MEMS wafers, especially for multi-layer wafers with free shape.
Design of a Constant Probing Force System for Profilometer
Authors: Liu Shou Bin , Li Zhan Ping
Published: February 2014

The core component of profilometer is a stylus displacement measuring system, whose resolution reaches nanoscale. Since the stylus tip is very small, a variation on probing force has a great impact on the results of high-precision displacement measurements. In this paper, a special flat rectangular voice coil motor is designed to realize a constant probing force for the stylus displacement measuring system. Experimental results show the probing force can be adjusted from 5mg to 1000mg and the resolution can reach 5mg.
Research on Sound Velocity Measurement Method by Three Microphones Based on LABVIEW
Authors: Li Ran , Feng Tao , Zang Fu Yao , Hu Jun Jie , Zhang Li , Wang Jing
Published: February 2014

This paper proposes a new method of getting sound velocity by measuring the sound pressure at three positions in a tube. By using LabVIEW software as a platform and building the measurement system, sound velocity at different frequencies in current media is measured. Compared the experimental results with theoretical calculation ones, the correctness of the method discussed in this paper and the reliability of the system are validated.
Mechanical Properties of Nanocrystalline Coatings Prepared by Thermal Spraying Process
Authors: Bacha Nacer E. , Bouterfaya Slimane
Published: February 2014

The uniaxial tensile tests are generally used to measure the yield stress and/or tensile stresses. The majority of the results, resulting from this method and deferred in the literature on the mechanical properties of amorphous materials, were obtained in the ribbons form generally produced by melt spinning. This limitation in the shape of the specimens for tensile tests was inherent in the manufacturing techniques of the amorphous materials which required cooling rates of about 106°C/s. The fabrication of amorphous coatings by plasma spraying, in tubular form, should improve rigidity of the specimens, increase their size and especially get a more reliable means to the amorphous coatings under the tensile test. Amorphous coatings of NiCrBSi alloys are produced by thermal plasma spraying. The thickness of the resulting amorphous deposit may be up to 500 μm. The uniaxial tensile tests were carried on Instron machine at room temperature. Microstructural studies are investigated by means of X-ray diffraction (XRD), scanning (SEM) and transmission (TEM) electron microscopy. The test methodology used in this study shows that it is possible to obtain a comprehensive assessment of the mechanical properties of the amorphous coatings deposited by thermal plasma in tubular form. Plasma sprayed coatings in tubular form, under the uniaxial tensile test in the amorphous state, crystallized and nanocrystallized, fracture without bursting compared to samples in the form of amorphous ribbon.
An MMSE Approach to Channel Shorting for Underwater Acoustic FH-FSK Communication
Authors: Fan Wei Wei , Liu Lu , Zhang You Wen , Dong Ji Gang , Sun Da Jun
Published: February 2014

Underwater acoustic channel is the biggest obstacle which causes the underwater acoustic communication falling behind the wireless communication. Generally speaking, underwater acoustic channel will represent doubly spread, i.e. multipath spread and Doppler spread. Also the multipath spread will be quite long in the underwater acoustic channel. For example, the multipath spread will be several milliseconds in the shallow sea and several seconds in the deep sea. Multipath spread will lead to Inter-Symbol Interference (ISI), and Doppler spread will cause the channel to be rapidly time-varying. Although ISI can be suppressed by channel equalizer, but because of the long multipath spread, it increases the complexity about the design of the equalizer. In this paper, channel shortening will be used to reduce the ISI. We present two methods of channel shorting, which are Time Reversal (TR) filter and the Minimum Mean Squared Error (MMSE) filter. When the two filters are used in FH-FSK, we found that the performance of MMSE filter is better than TR filter. Taking into account the characteristics of sparse underwater acoustic channel, Compressive Sensing (CS) algorithm is used for channel estimation. Finally, We perform a series of numerical simulations and the experiments on the lake to show that MMSE filter outperformances the TR filter under the FH-FSK system using the bit error rate (BER) as an evaluation criterion.
A New Cascaded Stochastic Resonance System and its Application to Weak Double-Frequency Signal Separation
Authors: Zhang Hai Bin , Lu Si Liang , Zhang Shang Bin , Ouyang Ke Sai , Kong Fan Rang
Published: February 2014

Weak signal detection has attracted many researchers attention all over the world. Most of the methods focus on the single frequency signal. This paper introduces a new method to separate the weak double-frequency signal overwhelmed in heavy background noise. The cascaded stochastic resonance (SR) system (CSRS) is composed of a bistable SR model in the first stage and a tristable one in the second. Based on the characteristic of the SR system, we can amplify the useful signal of high frequency using twice sampling technic to make its parameters matching the requirements of the system. In our proposed cascade stochastic resonance system, we highlight the appointed frequency from high to low successfully with adjusting the twice sampling multiple and the high pass filter band. The signal composition of different frequency can be obtained from the systems two stage output. Simulated experiment validates the CSRSs availability in weak double-frequency signal separation and also its promising application in a more complex mixed signal.
Research on Discharge Signals Feature Extraction of Sealing Packaging Food Existing Pinholes Based on EEMD
Authors: Zhang Qian , Zhang Shan Geng , Ma Yue
Published: February 2014

The issue of food safety is increasingly becoming the focus of social concerns, and breakage of packaging film is the main threat to the safety of sealing packaging food. For the small damage that is difficult to see with the naked eyes, according to that the impedance of damaged position is different from that of other position, the discharge signals of sealing packaging food in different damaged conditions are different in high voltage dielectric barrier discharge circuit, and then they are collected and analyzed. In order to solve the problem that different discharge signals are similar and characteristics are confused, wavelet packet and the EEMD method are novelly used to analyze discharge signals and the characteristic parameters of sealing packaging food that is intact or has pinholes are successfully extracted. This method solves the problem that the tiny damage is difficult to identify and detect, and it also provides a new train of thought for online test of sealing packaging food.
FH-FSK Underwater Acoustic Control and Communication System Based on LDPC Code
Authors: Dong Ji Gang , Sun Da Jun , Zhang You Wen , Fan Wei Wei
Published: February 2014

In this paper, a frequency-hopping frequency-shift keying (FH-FSK) underwater acoustic control and communication system based on Low Density Parity Check Codes (LDPC) is proposed by combining with FH-FSK system and LDPC. The anti-jamming performance of the system in the condition of Gaussian white noise and coherent multi-path channel is simulated respectively. The simulation result shows that FH-FSK system based on LDPC has a better performance than that of convolutional code. Therefore, it is more applicable for the system to have a stable anti-jamming performance and better robustness.
Air Quality Evaluation Based on Local Normalized Image Contrast
Authors: Yang Wen Ming , Chen Xiang , Liao Qing Min
Published: February 2014

Air quality has been paid increasingly attention, and air quality evaluation via digital image technology can help people know the air quality conveniently. Visible pollutants can affect the degree of image blurring, so it is possible to evaluate the density of these pollutants using image processing. We adopt a local normalized image contrast and attempt to explore its relationship with the values of PM2.5 and PM10. Experimental results demonstrate the proposed measure is promising.
Inexact Distributed Reconstruction via Alternating Direction Method
Authors: Wang Lin Yuan , Cai Ai Long , Yan Bin , Li Lei , Zhang Han Ming , Hu Guoen
Published: February 2014

Total variation (TV)-based CT image reconstruction has been shown to be experimentally capable of producing accurate reconstructions from sparse-view data. In this study, an inexact distributed reconstruction algorithm based on TV minimization has been developed. The algorithm is relatively simple as it uses the inexact alternating direction method, which involves linearization and proximal points techniques. The outstanding acceleration factor is achieved as the algorithm distributes the data and computation to individual nodes. Experimental results demonstrate that the proposed method can accelerate the alternating direction total variation minimization (ADTVM) algorithm with very little accuracy loss.
Research on Infrared Thermal Imaging Technique for the Sidewall of LNG Storage Tank
Authors: Jiang Jie , Zhu Wen Da , Yang Gong Sheng , Yan Jing Peng , Gao Nan Jin , Zhao Lei , Zhang Qing
Published: February 2014

Liquefied natural gas (LNG) is obtained by cooling the gas temperature to -162 degree. Problems with the steel cans, the insulation layer or the concrete tank of the LNG tank can lead to changes of the temperature, local temperature decreases, and the safety of the tank is threatening. Through the combination of many sets of infrared thermal imager to monitor the temperature of the LNG storage tank’s sidewall, analyze the heat imagine, establish the corresponding relationship between the locations on the sidewall of the LNG tank and on the heat imagine, determine the position of the temperature point on the tank wall. Infrared thermal imaging technique for the sidewall of LNG storage tank can find out the heat abnormal conditions and fixing the temperature drop area in time, and provide powerful guarantee for the safe storage of the liquefied natural gas.
Extraction of the Palm Vein Texture Features Based on Gabor Wavelet Transforms
Authors: Shi Yan , Wang Long Wu , Lan Hui Ying , Zeng Guang
Published: February 2014

A texture feature extraction method based on Gabor wavelet transform is presented to avoid the limitations of the shape structure characteristics extraction in the palm vein image. First acquire the palm vein images by independent structures of vein acquire device then extracts ROI area of vein images by determining the centerline of the middle finger and ring finger interphalangeal. Correcting the vein image by Gamma operator will improve the contrast of the processing image. Finally, transform the image based on Gabor wavelet to extract texture feature.
A Novel Method of Macro Block Motion Prediction Using Particle Filter
Authors: Ye Long , Liu Dang Jing , Zhong Wei , Zhang Qin
Published: February 2014

As we all know, there is conspicuous connectivity shared by neighboring image block attributes between consecutive frames. In this paper, we used particle filter to estimate the motion curve for every macro blocks during a certain time period, and then developed a video reconstruction computing method by doing the mean and interpolation processes. Compared with MVs, the video constructed by our method can remain more structural features existed in the original image sequences, and has great potential in increasing coding efficiency.
An Effective Multi-Feature Extraction Method for Manually Plotted Well-Log Curve Line
Authors: Xia Zhen , Gao Hai Jiao , Zhang Xiu Hua
Published: February 2014

An effective multi-feature extraction method for well-log curve line plotted manually. Several log curve line features are used to extract the well log curve information in the proposed method: gray value similarity feature, connected region Length feature, projection feature and distance and angular feature. The experimental results show the good effect of the method for the well log curve information extraction.
Study on Wall Slip in Pipeline Flow of Dense Paste
Authors: Lv Fu Yan , Xia Zheng Meng , Gao Jie , Hao Xue Di , Wu Miao
Published: February 2014

The apparent wall slip flows of incompressible and viscoplastic fluids in plane pipeline were analyzed assuming that the apparent slip layer consists solely wall slip layershear layerslug flow part and they are independent of the flow rate. Taking coal slurry for example,the experiment is conducted on pressure pipe rheological and resistance characteristic test system. It studies how two key factors (the particle concentration and the pipe diameter) influence the dense paste wall slip velocity. The assumed apparent slip mechanism provides methodologies for the determination of the slip velocity values that are consistent with the traditional Mooney method and furthermore allows the determination of the true shear rate of the dense paste at the wall and the yield stress. The analysis of the slip data of various dense pastes of rigid particles reveals that the apparent slip layer thickness is related to the particle concentration and the pipe diameter.
Topological Equivalence in Multi-Scale Remote Sensing Image Segmentation
Authors: Liu Xiao Li , Zhu Guo Bin , LI Jing Gang , Li Xue
Published: February 2014

Multi-scale image segmentation is a kind of effective means to realize the multi-scale expression of geographical entity features. Describing regions of segmented image and their spatial relation is important for multi-scale image segmentation. The paper focuses on irregular pyramid structure based on topology map to research the equivalence of topological relations on different scales in multi-scale image segmentation, which is important for effectively updating the segmentation process.
Decision Method of Optimal X-Ray Digital Imaging Parameters
Authors: Tao Liang , Tong Yu Jie , Zhao Hang
Published: February 2014

X-ray Digital imaging is an innovative method of metal fusion welding quality evaluation. To improve the accuracy, the digital imaging sensitivity must be increased by studying the optimal radioactive parameters. At first, the basic elements, inherent characteristics and imaging principle have been analysed systematically. Secondly, the optimization method of sampling rate, stacking frames, focal length, cube voltage and current have been studied based on the phisical characteristic of FPD( Flat Panel Detector). At last, the method has been verified upon two platforms. The experimental results from different systems proved correctness and applicability.
Adsorption Characteristic Research of Sediments of Lake Baiyangdian
Authors: Qin Zhe , Wang Qian , Liu Zheng
Published: February 2014

This paper regarded the sediments of Lake Baiyangdian as the object of study, researched and analyzed ammonia nitrogen adsorption characteristics of sediment samples. The results showed that: the sediments adsorption to ammonia nitrogen reached a state of equilibrium after 2.5h, The ammonia nitrogen adsorption rate was maximum in 0~10min. Sediment adsorption of ammonia nitrogen was higher as ammonia nitrogen liquid balance concentration increased. The adsorption isotherm curve of ammonia nitreogen can be fitted well by the Langmuir adsorption isotherm model. The total maximum adsorption quantity of ammonia nitrogen by the sediments of Lake Baiyangdian is between 54.12mg/kg to 240.12mg/kg.
Edge Detection of Color Images Based on Improved Morphological Gradient Operators
Authors: Liang Jian Yong
Published: February 2014

Edge detection is an old and hot topic in image processing, pattern recognition and computer vision. Numerous edge detection approaches have been proposed to gray images. It is difficult to extend these approaches to color image edge detection. A novel edge detection method based on mathematical morphology for color images is proposed in this paper. The proposed approach firstly compute vector gradient based on morphological gradient operators, and then compute the optimal gradient according to structure elements with different size. Finally, we use a threshold to binary the gradient images and then obtain the edge images. Experimental results show that the proposed approach has advantages of suppressing noise and preserving edge details and it is not sensitive to noise pixel. The finally edge images via the proposed method have high PSNR and NC compared with the traditional approaches.
Feature Based Parametric Design of Piston Reliability
Authors: Wang Feng Jun
Published: February 2014

In this paper the characteristics of the piston features for classification and feature library; at the same time the feature size and the feature existence parametric methods are discussed in detail. In a detailed analysis of the engine piston load based on, forward piston mechanical,thermal boundary conditions, forward piston mechanical, thermal boundary conditions, the results show that the original piston has a larger reserve strength, this research provided probility for the further optimization.
Influence of Technical Parameters on Contact Pressure in Straight Bevel Gear Meshing
Authors: Luo Qiu Ping , Cai Jian , Xiong Xiao Shuang , Deng Song , Li Feng Qin
Published: February 2014

Wear is one of the main failure modes of gears in the meshing performance, and contact pressure is the key factor to determine the wear of gears. The main purpose of this paper is to investigate the contact pressure distribution and evolution laws in straight bevel gear meshing. Based on a 3D FE model of the specific loaded assembling straight bevel gear pair, the influence of friction coefficientf, torqueTand elastic modulusEon the contact pressure of straight bevel gear in a meshing circle is studied. The results show that the contact area and contact pressure increase dramatically with the increase of the torque. The contact area decreases and the contact pressure increases with the increase of elastic modulus. Friction coefficient almost has no effect on the contact area and contact pressure. This research has great theoretical significance to reveal the wear mechanism and improve the meshing performance of straight bevel gears.
Microstructure Evolution of Ti-6Al-4V Laser Weld Joint HAZ in Superplastic Deformation Process
Authors: Huang Zhi Jiang , Chen Long , Cheng Dong Hai , Chen Yi Ping , Hu Dean
Published: February 2014

Microstructure of Ti-6Al-4V laser weld joint heat affected zone was observed. The results suggested that the heat affected zone microstructure first transformed to lamellar structure, then the grain growth and transformed to equiaxial grains. At the same temperature, the grain growth rate was faster at lower deformation rate, and the microstructure was more uniform.
Research on Finite Element Static Analysis in Mechanical Vehicle Structure Design
Authors: Li Xie
Published: February 2014

Finite element static analysis is a method for optimizing the design. It results from the combination of mathematical optimization method and modern computer technology. It enables a certain design to get better parameters under a variety of restrictions, thus making an optimal value of design index. In the traditional design process, Based on the initial design, the designers, with their own experience or accumulated experience by others and expertise, could ultimately get a more satisfactory one through repeated experiments, comparison and improvement. Experiencing long design cycle and consuming many human and financial resources, this approach may have found a better solution, but it is generally not able to find the optimal design. Fortunately, the finite element static analysis method provides the approach to an efficiently optimal design.
High Temperature Deformation Behavior and Dynamic Recrystallization Law of 33Mn2V Steel for Oil Well Tube
Authors: Jia Rui , Wang Fu Zhong
Published: February 2014

Deformation behavior of steel 33Μn2v for oil well tube was studied by hot compression tests conducted at various temperatures and strain rates.The Kumar model was developed to predict the hot deformation behavior of steel 33Mn2V for oil well tube.In this regard,the hot compression tests were carried out at the temperatures from 750°C to 1200°C and at the strain rates of 0.02s1 to 0.16 s1.The experimental data were then used to determine the constants of developed constitutive equations. The Kumar model can be represented by ZenerHollomon parameter in a hyperbolic sinusoidal equation form.The apparent activation energy of deformation is calculated to be 342.1481kJ/Mol.Dynamic recrystallization of steel 33Mn2V occur and the completion of the critical deformation is small,termination error and the initial deformation is smaller.Therefore,its easy for the steel 33Mn2V to the occurrence and completion of dynamic recrystallization.
Remote Household Appliance Control System Based on Internet
Authors: Sun Hong Yue , Fan Wen
Published: February 2014

This study presents a remote household control system based on Internet. In this system, the home appliance equipments are controlled by single chip microcomputer (SCM) and communicated with Ethernet using network controller chip RTL8019AS. SCM interact information with the remote computer and remote terminal can realize monitoring system of the household through the Internet. The system has a strong agility and convenience.
Design of MFL Inspection Device for Underground Oil Tanks Based on Independent Calibration Method
Authors: Liu Fu Jun , Kong Shuai , Ding Kai , Zheng Mu Lin
Published: February 2014

The underground oil tanks are usually ellipsoid shaped and horizontal placed, in order to inspect the underground oil tanks using MFL method, a magnetization structure contains three sub parts was designed for curvature plates, the impact by the uneven placement sensors was analyzed, a new channel independent calibration method was raised. The calibration method, as well as the digital signal processing method was programmed in the inspection software, then a motor drive walking device was designed, at last the inspection device was established. Through comparison of channel independent and identical calibration methods, the experiment result using channel independent calibration method has better precision of about 1/3 discovery rate.
Design of a Chaos Phenomenon Exhibition System
Authors: Ouyang Ke Sai , Lu Si Liang , Zhang Shang Bin , Kong Fan Rang
Published: February 2014

This paper introduces a design of an interactive machine named Chaos Phenomenon Exhibition System (CPES). The CPES is a mechatronics system that consists of 180 independent modules, and each of them is a 2-Degree Of Freedom (DOF) machine which can realize forward and backward stretch on the horizontal plane, and clockwise and counterclockwise rotation synchronously. With the help of some sensors, the CPES can exhibit the effect of chaotic changes via the movements of the 180 modules. In this paper, the hardware (includes the mechanical structure and the electrical system) designs were introduced firstly. Subsequently, an algorithm was proposed to control the modules movement for exhibition of the chaos phenomenon. Finally, some improvements were conducted based on system simulation and field debugging. The CPES has been exhibited in a science museum in China and it is admired by lots of audiences.
Dynamic Modeling of a New Version of Cylindrical Planetary Gear Used for a Robotic Arm
Authors: Pascale Lucia , Patic Paul Ciprian
Published: February 2014

This paper presents the dynamic modeling of a new variant of helical planetary gear proposed by the authors, generated by the Vaucanson`s planetary mechanism. This model can be apply successfully helping a robotic arm in motion. It is considered that the gear made connects between a motor and a pump, whose mechanical properties are known. Using Matlab-Simulink is setting the equations of motion and dynamic response, both in premise neglect friction and the premise of considering friction.
Modular Design Based on Design Rules
Authors: Wang Ri Jun , Luan Wei Juan
Published: February 2014

Based on modular design rules proposed by IBM, modular design process was planned, which included product overall structure analysis and interface standardized design. Based on module partition, undirected graph was used to represent the relationship between the modules and the product's overall structure. By analyzing the interaction between modules deeply, the structure, dimension and parameter of the interface were standardized in order to determine the standard interface of each module. Brittle materials processing equipment was used to demonstrate the modular design process.
Dynamic Motion and Modal Analysis Simulation for the Balance Mass of the Crankshaft of a Two-Cylinder Reciprocating Air Compressor
Authors: Huang Yi Cheng , Lin Dain Yu
Published: February 2014

The purpose of this study is to suppress the problem of vibration which occurs in a running two-cylinder reciprocating compressor. Determining an optimal crankshaft counterweight and narrowing the trajectory orbit of the crankshaft connecting rod mechanism is achieved. Use of finite element software (ANSYS) was used to simulate the modality of the two cylinders. In additions, the inertial force influenced to the crankshaft under different counterweight design was simulated. Simulation results by using SolidWorks software show the new counterweight was able to reduce the crankshafts eccentric by 4mm and the orbit trajectory by 10mm. This study provides the procedures pertaining to the bettering performance and assessment for an existing reciprocating compressor.
Research of IOT in the Application of Wisdom Agricultural
Authors: Min Wang Zu , Chao Qiao Ming
Published: February 2014

As IOT technology attracted widespread attention of the whole society in recent years,communication network, intelligence chip and embedded system has become the hot spot research in the application of agriculture. This paper introduces the concept of IOT technology, expounds the IOT's three-layer structure: Perception layer, Network layer and Application layer; Meanwhile, a detail description of wisdom agriculture is also made, and the IOT's application in agriculture along with chart patterns is analyzed; Finally, the paper illustrates Internet application example and the prospects of application of IOT's technology in agriculture as well as the role in promoting scientific and technological progress and industrial development.