bluuebunny/crossref_metadata_2025 huggingface dataset:
Super-Hydrophobic Surface Manufacture on Pyrolytic Carbon via Electrostatic Spinning Method
Authors: Li Ren Xing , Wang Ze , Liang San Kuan
Published: September 2013

To reduce the adhesion of blood cells to the pyrolytic carbon surface of heart valve prosthesis, pyrolytic carbon is utilized as the foundation material for the realization of surface super-hydrophobicity. In this process, 10% PVP in concentration is used as the raw material and netted fiber film is textured on the surface of pyrolytic carbon material via electrostatic spinning method at the voltage of 12KV. The experiment results show that the contact angle of the pyrolytic carbon surface amounts to 154o after electrostatic spinning treatment and many porous structures are formed on the fiber film. The conclusion is thus reached that fiber film featured by super-hydrophobicity is attributable to the inability to fill the fiber meshes of liquid drops, which retain the air beneath and then give rise to this super-hydrophobic feature.
Foamed Buffer Material Made from Fibers of Old Newspaper
Authors: Wang Dai Qi , Yan Bin
Published: September 2013

The foamed plastics are not bio-degradable and not readily recyclable. How to substitute new foamed buffer materials with lower pollution for foamed plastics became a popular research topic. The paper discussed the effects of microwave power, natural bonding agent, lubricating agent and crosslink agent on foamed buffer material with fibers of old newspaper and inorganic foaming agent. The result showed that increasing of microwave power could be beneficial to decrease the molded time and density of foamed buffer material with fibers of old newspaper. The best foamed properties were achieved with proper dosage of natural bonding agent like wheat flour, glyceryl monostearate sodium borate at the microwave power of 575W.
Influence on Red Long-Lasting Phosphorescence due to Different Doping Concentrations of ZnGa2O4:Cr3+
Authors: Zhong Rui Xia , Liu Zi Ran , Qiu Qing , Qi Jian Quan , Zhang Xiao Yan
Published: September 2013

High temperature solid state reaction has been used to prepare the new red long-lasting phosphorescence (LLP) material ZnGa2O4:Cr3+ with different doping concentration. The afterglow properties of the samples have been investigated. Our study has shown that ZnGa2O4 samples without Cr3+ doping have blue-green afterglow. While the blue-green afterglow has disappeared and the red long-lasting phosphorescence according to the Cr3+ luminescence center covering 650 nm-750 nm has been observed when Cr3+ has been doped. In terms of brightness and decay time of the afterglow, the red afterglow and the blue-green afterglow have been entirely different. In this article the influence on LLP due to different doping concentrations of ZnGa2O4:Cr3+ has been discussed and the possible LLP mechanism has been proposed.
The Mechanisms on the Transmittance and Photo-Catalytic Activity of TiO2 Film Doped with SiO2/PEG
Authors: Dou Wen Wen , Huang Guo Wei , Niu Yu Chao , Wang Xiao Li , Liu Xiang Ju
Published: September 2013

TiO2sol was doped with SiO2and modified by adding PEG. Using the sol the self-cleaning antireflective films were prepared with dip-pulling method. Field emission scanning electron microscope (FESEM) test results showed that the TiO2-SiO2film surface distributed a large number of pores and grooves. The visible spectrophotometer testing found that the transmittance showed a decreasing trend with the increase of TBTT: TEOS ratio. Meanwhile, the photo-catalytic efficiency showed an increase firstly and then decreased with the TBTT: TEOS ratio increasing. When the ratio of TBTT: TEOS was 1:5, the films transmittance and the photo-catalytic efficiency can reach up to 97.1% and 13.5% respectively. The mechanisms on the transmittance and photo-catalytic activity of PEG-modified TiO2-SiO2films were studied. It was found that PEG-modified TiO2-SiO2films have higher porosity, transmittance and hydrophilicity than pure TiO2film. Furthermore, photo-catalytic activity of the TiO2-SiO2film was enhanced.
Removal of Carbonyl Compounds in Diesel Exhaust Gas by Direct Non-Thermal Plasma
Authors: Jiang Fei , Cai Yi Xi , Han Wen He , Li Xiao Hua , Dong Miao , Chen Ya Yun
Published: September 2013

The variation of carbonyl compounds in diesel exhaust at four loads before and after the treatment of Direct Non-thermal Plasma (DNTP) is studied with 2,4-dinitrophenylhydrazine (DNPH) derivatization method and high performance liquid chromatography (HPLC) analysis technique. The results show that the mass concentration of carbonyl compounds decreases firstly and then increases with the growing of diesel load before the treatment of DNTP. After the treatment of DNTP, the mass concentration of carbonyl compounds reduces remarkably. Maximum removal efficiency for total carbonyl compounds can reach 93.8% at 75% load. For acrolein, acetone, butyraldehyde and 2-butanone, removal efficiency can reach 100% at 25% load, 50% load and 100% load. At the same time, total ozone formation potential decrease dramatically.
Reservoir Architecture Analysis of 8th Member of Lower Shihezi Formation in Sulige Gas-Field
Authors: Lu Hai Jiao , Li Tai Wu , Xu Cheng Wu , Wang Ji Ping
Published: September 2013

The sand of 8th Member of Lower Shihezi Formation in Sulige Gas-field is thick and has complex structure. The reservoir lateral changes quickly and effectively lower reservoir drilling. Through outcrop, modern river sediments and core observation, the composite river fancies types, sedimentary characteristics,the reservoir internal structure, spatial overlay mode and developmental scale of the 8th Member of Lower Shihezi Formation are studied to deepen the understanding of the reservoir, deployment and guidance of exploration.
Practice of Fuzzy-Ball Drilling Fluid Technology in Qinping CBM Well 12-11-3H with Six Branch Holes
Authors: Cui Jin Bang , Zhang Ji Hong , Zhu Qing Zhong , Chen Bi Wu
Published: September 2013

The 3# high rank coal in Qinshui basin frequently takes place of falling block, sloughing hole, leaking and pipe-stuck during drilling operation. The third open of 12-11-3H well in Qinping is consist of 2 main-branch and 6 sub-branch, using fuzzy-ball drilling fluid for 3 days accomplishing a footage of 4 189.49m. In order to adjust performance of drilling fluid, mix 4 fuzzy-ball drilling fluid additives SDS, SDBS, HES PAM together according to different well condition. The density of this drilling fluid is from 0.96 to 1.08g/cm3. The plastic viscosity of it is from 7 to 17mPa.s, the yield value is from 4.0 to 10.22Pa. After using this fuzzy-ball drilling fluid, the drilling rate has increase to 95%, completing the geological demand with an average drilling rate of 12.65m/h. Compared with adjacent well, the drilling rate has been raised 11.55% with no serious falling block, sloughing or leaking in whole well. However the solid control equipments still need to be strengthened for further improving drilling rate and economic benefits.
Experimental Study on the Crushing Process of Granular Layer
Authors: Zhang Jun Cui , Wang Li Cheng
Published: September 2013

In order to make clear the effect of material on the vibration crusher which is a rigid-loose coupling dynamics system, a crushing experiment of limestone granules was made. The limestone granules were restricted in a rigid metal containers, and they were crushed by the pressure from the press. The constitutive relation-nonlinear hysteresis of granules in the crushing process is gained. The effect of the maximum pressure and the granular layer thickness on the constitutive relation and granule size distribution is obtained. The relation between energy absorption and crushing ratio is acquired. This experiment provides some theoretical support for the design of new vibration crusher.
Experimental Investigation on Surface Topography for PTMCs during High Speed Grinding
Authors: He Jian , Ding Wen Feng , Miao Qing , Zhao Biao , Liu Zhi Wu , Liang Yang Min
Published: September 2013

The present article deals with the surface topography during high speed grinding of particulate reinforced titanium matrix composites (PTMCs). Scanning electron microscopic images of the ground surface was analyzed. Combining the results presented in this paper, the following results could be summarized: (1) The reinforcing particles of PTMCs are removed by means of voids, pulled-out, fracture or crushed, and micro-cracks, which attributed to the plowing and shearing during high speed grinding. (2) The formation of the fracture pattern of PTMCs is formed due to the wear debris of the abrasion during high speed grinding.
Comparative Study on Design Schemes of Composite Holding Pole Structure
Authors: Ni Da , Miao Qian , Xia Yong Jun , Hao Yu Jing
Published: September 2013

Merits of lightness and high strength of composite holding pole are introduced in this paper; in addition, three structures are calculated and compared with traditional holding pole made of aluminum alloy so as to prove the former can replace the latter.
Determination of Elements in Carbon Fiber Using Inductively Coupled Plasma Mass Spectrometry (ICP-MS)
Authors: Zhao Ting , Zhou Ming Qiang , Liu Wei Li , Huang Wei , He Jun Zhi , Chi Hai Tao , Gao Xia
Published: September 2013

Based on microwave digestion and dry digestion, the concentrations of Si, S, Ca, Cr, Fe, Ni, Cu, Al, Mo, Sb, Ti, V, Y and Zn in carbon fiber were determined using inductively coupled plasma mass spectrometry (ICP-MS). Compare with the concentrations in the solution got by microwave digestion, the concentrations in the solution got by dry digestion are higher. And microwave digestion is more suitable for treatment of carbon fiber containing volatile elements than dry digestion.
Effect of Laser Fluence on the Growth of Mo Films Prepared by a Pulsed Laser Deposition Method
Authors: Lei Jie Hong
Published: September 2013

Molybdenum films with flat and smooth surfaces were prepared on Si (100) substrates using a pulsed laser deposition method. results indicate that increased laser fluence results in narrower diffraction peak, higher surface roughness, and transition from amorphous state into polycrystalline state with gradually increased grain size. The growth mechanism of the films and the effects of particle energy on the growth of the films are discussed based on an analysis of the changes in the crystallization process with laser fluence.
Welding Technology Research for the Train Bogie
Authors: Wang Gang , Chen Zhi Gang
Published: September 2013

Train bogie weld joint requirements with well toughness, high fatigue resistance and high resistance to overload. This article analied the weldability of SMA490BW steel, Combining with the characteristics of train bogie structure, a welding process scheme which had been used in practical productionwas worked out . Process testing and assessment results showed the process can obtain high quality welded joint.
A Study of the Hot Cutting Technology to EPS Architectural Model
Authors: Wu Xiao Jun , Xu Fu Ru , Shao Ji Gang
Published: September 2013

This paper provides the details of continuous cutting technology to architectural model made by EPS. To solve the interference problem between outline surface and hot cutting-wire in the cutting process, STL model projection profile method is used. Slicing algorithm based on grouping matrix is proposed to cutting the outline model continuously. Local topological relations in each group are established to improve the efficiency of slicing cutting. In order to apply this algorithm to the actual process better, automatic programming system with Visual C + + 6.0 based on STL model is developed, which used the 5-DOF CNC thermal device to cut the model. The experiment shows that this technology can cut the outline architectural model efficiently and accurately.
Research on Landscape Limestone Damage and Deformation under Uniaxial Compression Based on Acoustic Emission
Authors: Xiao Yong Qin , Wan Yi Ping , Liu Bao Xian
Published: September 2013

In order to establish the relation between acoustic emission parameter and rock mechanical damage mechanism, as well as to better figure out landscape limestone damage and deformation influenced by uniaxial compression, MTS815 rock mechanical electro-hydraulic servo test system and 8CHSPCI-2 acoustic emission and detection system are applied to implement a test and research on damage evolution of limestone under uniaxial compression and the corresponding acoustic emission feature. On this basis, the acoustic emission feature of limestone under uniaxial compression is analyzed. Moreover, based on the damage variable of normalized accumulated emission ringing count, the uniaxial compression limestone damage model based on acoustic emission feature is established, and the damage evolution curve and equation of limestone is figured out as well. Shown by the research, acoustic emission information reflects the internal damage of limestone, and is closely related with densification of inner original fracture, as well as emerging, developing, and merging of new fractures. The acoustic emission feature of limestone perfectly describes its deformation and damage evolution.
Application of Environmental Protection and Safety Bituminous Mixture in Tunnel
Authors: Wu Xi Rong , Zhen Nan Xiang , Cong Zhuo Hong , Sun Guo Qing
Published: September 2013

Based on the special performance of the tunnel, a low temperature, flame-retardant and safety environmental noise reduction asphalt mixtures was developed. The result of paving the experimental road section showed that environmental protection and safety bituminous mixture compared with ordinary hot mix asphalt mixture has low temperature, fire-retardant, noise reduction characteristics. Keywords: road tunnel; viscous and environment asphalt; Mixture design; Pavement performance;test road
Research and Application Cases Analysis on the Key Technology in the Control Platform of the Internet of Things
Authors: Zheng Hong Jian , Li Qiang , Zhang Peng Fei
Published: September 2013

in the current days of the fast developed internet of things (IoT), the IoT technology is gradually extended to the construction of livestock cultivation industry. In order to advance the intensive level of the livestock cultivation and accelerate the construction of livestock cultivation IoT in our country, this paper presents the IoT system suitable for livestock healthy cultivation in our country and introduces the system from three aspects: system requirements, technical framework and system function, in which the main focus is the application system and the key technology involved in each system modules is analyzed.
Proof of Optimality of Ordered Subcarrier Pairing in Amplify-and-Forward OFDM Relay Systems without Diversity
Authors: Quan Qing Yi
Published: September 2013

Amplify-and-forward (AF) orthogonal frequency division multiplexing (OFDM) relay systems without diversity are studied, with emphasizing on the subcarrier pairing at the relay node. Using the subcarrier pairing based on the signal-to-noise power ratios (SNRs) of subcarriers, it is proven that the ordered subcarrier pairing (OSP), according to normalized channel gains of the subcarriers of OFDM at two hops, is optimal in terms of system capacity, without any assumption for SNRs of subcarriers and types of power constraints. The proof about the optimality of OSP shows that in this kind of relay systems, the subcarrier pairing and power allocation are completely decoupled.
Optimization Research on the Bolt Arrangement of a Double-Wall Steel Insulation Silo with Multiple Bolted Joint
Authors: Tang Gan , Pan Chao Hui , Yin Lin Feng , Li Yong
Published: September 2013

Double-wall fabricated steel insulation silo with multiple bolted joints is a new structure form of silo. The number of bolt studs used in the1000-ton silo is 12240 which take too much time and money. In order to cut down the cost and shorten the construction period, 6 alternative schemes are put forward to optimize the bolt arrangement. By comparison, Schemes 6 is adopted. The model which uses the original bolt arrangement is defined as Model 1. The optimized model is defined as Model 2. The stress and deformation of these two models were comparatively analyzed. The results show that the maximum stress and the maximum displacement of Model 2 are both smaller than the specified values. Furthermore, the number of bolt studs used in Model 2 is 6600 which is 5640 less than the original number. The bolt studs are saved 46.1%.
Research on Electro-Hydraulic Force Servo Control System Based on Adaptive Neural Network Control Strategy
Authors: Li Jian Ying , Yang Tian Ye , Wang Yan Wei , Mao Zhi Yong , Yan Geng Hui
Published: September 2013

It is unchangeable fact that there is great stiffness spring flexible load in electro-hydraulic force servo control system, and there is low oscillation frequency second order differential link in the numerator of the transfer function. On the other hand, the frequency response ability of the system is influenced badly from the link and the system may oscillate easily even is instability. Aiming at this special performance of the electro-hydraulic force servo control system and its small open loop gain characteristic, the adaptive neural network control strategy is adopted to the controller of the electro-hydraulic force servo control system this special performance system in order to improve the dynamic performance of the system. The model of the system with the adaptive neural network control strategy is built and the simulation and experiment study is done. Comparing the control result of the controller with the adaptive neural network control strategy to the control result of the controller with the traditional PID, and from the results of simulation and experiment, we can know that the mathematic model of the electro-hydraulic force control system controlled by the adaptive neural network control strategy is correct, and we can find that the controller with the new designed control strategy can not only increase the frequency response ability of system, but also improve the precision of system, and the controller can quicken the response ability of the system obviously.
Study on Electric Motorcycle Road Simulation Testing System Based on DSP
Authors: Chen Xin
Published: September 2013

According to the laboratory detection systems can not completely replace the electric motorcycle road inspection and unable to reproduce the problem, this paper designed a real road condition simulation and test system, developed a control core-board which was driven by DSP(TMS320LF2407A). Simulations and tests based on the database of road condition can be realized when the core drives the workbench using control algorithm. The experiment and application show that this test system has good performance, and achieve the design requirement.
Walking Stability Analysis for a Biped Robot Considering Ground Condition
Authors: Xu Ying , Zeng Zhi Yuan
Published: September 2013

With human characteristics of the structure of lower limb joints and simplify them, 12 degrees of freedom was equipped with for the lower extremities of biped walking robot. motion model is established and used to elaborate the movement characteristics in sagittal and lateral plane according to a particular mechanism of robot. The stability of robot in two or there dimensions is analyzed through ZMP principles and the calculation formula and measuring methods of corresponding ZMP are also concluded, Gait design data will be taken into the virtual prototype and make motion Simulation for gait, then get the simulation animation of walking straight, static turning and moves upstairs, This paper expounds the possibility of generating smooth walking trajectory with cubic interpolation. Using the dynamics simulation software to simulate the robot, the results show that the robot has the theory of stable gait, The control accuracy of joints position and the realization of desired purposes of the robot system.
The Response of Electrostatic MEMS Structure under Mechanical Shock and Electrostatic Forces
Authors: Li Xiang Guang , Huang Qin Wen , Wang Yun Hui , Jia Yu Bin , Wang Zhi Bin
Published: September 2013

For MEMS devices actuated by electrostatic force, unexpected failure modes can be hardly predicted when the electrostatic force coupled with the shock. A response model is established when a micro cantilever subjected to electrostatic force and mechanical shock. First, based on the theory of transverse forced vibration in vibration mechanics, the equation of motion under shock and electrostatic fore is presented. Then the reduced order model is gained after simplifying by mode superposition method. The computing results indicate that: the shock amplitude and duration are the key factors to affect the reliability of the device; the shock load and electrostatic forces make the threshold voltage much lower than the anticipated value. The micro cantilever may collapse to the substrate even at a voltage far lower than the pull-in voltage. This early dynamic pull-in instability may cause some failures such as short circuit, adhesion or collision damage.
The Agent Based Setup Structure for Agile Manufacture Execution System
Authors: Shao Xiao Guang , Ding Shi Yong , Bi Xue Jun
Published: September 2013

Agile manufacture execution system is the centre of whole system. The structure and function of the execution system are analyzed, the characteristics of Agent is also given. The Agent modeling method is used in the system, the function or unit can be transformed into Agent, so the setup structure for execution system of the agile manufacture system is build, and the resources, requirements are all brought into the networks. The systems operation relies on the interaction among the functional Agents.
Research on Power Matching of Automatic Variable Transmission
Authors: Qiu Xu Yun , Zhang Liang Xiu , Wang Hui Jun , Liu Yong Hui
Published: September 2013

Automatic Variable Transmission (AVT) is composed of a metal belt CVT unit and a step speed changing transmission component. According to the needs of automotive conditions, AVT can realize continuously variable transmission and gear transmission, which not only play the advantage of gear transmission efficiency, but also overcome the deficiency of CVT when it is in high-speed. In the paper, the transmission matching rule is introduced, and engine model is established using engine test data. Based on SimulationX software, a vehicle that equips AVT is used for modeling and simulation. Finally the power matching is researched.
Blind Estimation of Spreading Sequences Based on Improved Fast-ICA
Authors: Liu Xiao Zhi , Li Jing , Wu Liang Ming
Published: September 2013

To estimate the spreading sequences for DS-CDMA system, a blind estimation method based on improved Fast-ICA is proposed. In this method, the ECA whitening and BAT optimization are introduced into the traditional Fast-ICA firstly, then the improved Fast-ICA is used to obtain spreading sequences matrix, finally, the spreading sequences are extracted from the spreading sequences matrix. Simulation results show the validity and superiority of the new method.
Detection Performance for Distributed Radar Sensor Network
Authors: Liu Xiang Yang , Cui Fang , Kou Wan Li
Published: September 2013

The need for mobility and the rapid deployment motivates the research of distributed radar sensor network withNTtransmitters,NRreceivers and a fusion center, where the fusion center and the receivers are communicated via wireless signaling. With the assumption of orthogonal waveforms for sensing and circular complex Gaussian noise channel model for communication, the formulae of detection probability and the false alarm probability are derived given the sensing power and communication power. Numerical results show that with the increase of the total power, the ratio between the best sensing power and the best communication power will increase. Moreover, the shape of the region in which the target detection probability is larger than a predetermined value is not regular, which should be taken care in case of network planning.
Conversion Method of Description Files in Structural Testing of Digital Circuit
Authors: Wang Kang Yi
Published: September 2013

With the continuous development of large-scale integrated circuit technology, the importance of structural testing and testability design for digital logic circuit has become increasingly evident. In the testing domain, Bench is the most commonly used formats to describe a measured circuit. In order to test the measured circuit using computer, files with various formats must be converted to a netlist file which can be identified by computer. Lev format is a common netlist file. This paper mainly discusses how to convert the Bench file into Lev file, and it is proved by testing program correctness and robustness.
A Design of Printed Inverted-F Antenna for RFID Tag at 5.8 GHz
Authors: Yu Yan Zhong , Ni Ji Zhen , Li Xian Hui
Published: September 2013

A printed inverted-F antenna for RFID tag at 5.8 GHz is designed in this paper. The antenna structure consists of an inverted-F patch, a substrate layer, and a ground plane. To reduce costs, the FR4 is selected as the material of substrate layer, which is used commonly in PCB (Printed Circuit Board). Its relative permittivity is 4.4 and a loss tangent is 0.02. The inverted-F patch and ground plane are laid on/under the substrate layer respectively. The designed antenna is modeled, simulated and optimized by using HFSS (high frequency electromagnetic simulation software). Simulation results demonstrate that the printed inverted-F antenna can satisfy the requirements of RFID Tag applications.
Design and Realization of Tracking Autopilot for Leisure Yacht
Authors: Wang Chang Shun , Xiao Hai Rong , Han Yao Zhen
Published: September 2013

On the basis of the autopilot control principle and the STM32F103RBT6 controller, an tracking autopilot for the leisure yacht was designed with manual steering and automatic steering function in this paper. The schematic circuit design and software design were detailedly described. Practical application confirmed that the autopilot has high reliability and good steering performance.
Gait Planning of Humanoid Robot Based on ZMP and Cubic Spline Interpolation
Authors: Wang Xian Lun , Li Ping , Yang Fei Qi
Published: September 2013

Teaching programming and manual programming are usually used to realize gait planning of humanoid robot. Many methods are lack of the adjustment of center of gravity and lead to the robot walking instability. The gait planning of humanoid robot is solved based on the Linear Inverted Pendulum Model and Zero Moment Point equation in this paper. Two feet trajectories are also planned to realize the smooth transition and overcome the impact during walking with the cubic spline interpolation method. The validation and feasibility of the method proposed in the paper are proved by the results of simulation and experiments.
The Design and Simulation of a Smart Farm System Based on Ultra Narrow Band Communication
Authors: Zhang Xun , Chen Zhi Dong
Published: September 2013

This paper presents a Smart Farm system, which is based on Ultra Narrow Band (UNB) communication technology. As to the characteristics of large area and high livestock mobility on the farm, using traditional communication technology have the problems of high cost, high power consumption and difficult power supply, however, UNB can achieve a high spectrum utilization efficiency and reduce the power consumption. At first, this paper introduces the Minimum Side-Band (MSB) modulation technology which is one kind of the UNB technologies. Secondly, the key issues of digital demodulation is discussed. And then, a MSB transmission system include digital modulation and demodulation is designed and simulated. Finally is the design of Smart Farm based on UNB technology and the summary of the whole work.
Research on Power Expert System Technology Integrated Fault Tree Theory and Fuzzy Algorithm
Authors: Yang Shu , Zang Zhi Bin , Wu Hang , He Qing Su , He Jin Hong
Published: September 2013

The electric power system is a complex distributed system of large dimension, nonlinear, time-varying and uncertain dynamic parameters, the control and decision need expert experience, so the experts in electric power system as the control mechanism is relatively reasonable has been increasingly recognized. Automatic generation of state warning, exception reporting, monitoring of the equipment maintenance scheme and application of expert system. In this paper, by using the fault tree logic function description and fuzzy algorithm theory research of expert system based on expert system, so that the power has more accurate knowledge base and higher correctness of reasoning, in order to needs of production and operation of the power system to meet the better.
Research of Solutions Toward Typical Problems in Acquisition System of User Power Consumption
Authors: Zang Zhi Bin , Wang Ying Nan , Wu Zhan Xia , Sun Li Li
Published: September 2013

The acquisition system of user power consumption can collect data with local and remote communication. To solve the problem of local communication in different station areas, we analyzed the characteristics of Chinese power grid in six typical station areas, and found out the combined way of broadband power-line communication and micro-power wireless communication is the best solution. Meanwhile, we proposed three solutions to solve the problem of blind spots in remote communication, including wireless with electric expansion, low-voltage broadband power-line cascade connection and mid-voltage broadband power-line cascade connection [. These solutions of communication can provide technical supports to help building the acquisition system of user power consumption.
The Dynamic Behavior Research of Coupling Shafts in Tufted Carpet Looms
Authors: Sun Zhi Jun , Xu Yang , Huang Shuang , Sun Yi Ze
Published: September 2013

Firstly, based on the structure of tufted carpet looms (DHGN801D-400), the lumped parameter models were built, in which included the massless shafts, lumped masses, disk and elastic support. Secondly, according to various parts of the relationship between force and deformation, the transfer matrix of right and left ends were established, thus the universal transfer matrix of shaft units was determined by solving the various parts transfer matrix simultaneously. Thirdly, the dynamic behavior model of coupling shafts in tufted carpet looms was given, and different natural frequencies were acquired by simulating the model in Matlab. Lastly, the dynamic behavior model using transfer matrix was verified to be effective and feasible by experiment.
Distributed Feedback Gratings Based on Photo-Polymerization for Organic Solid-State Lasers
Authors: Zhao Xuan Ke
Published: September 2013

A novel preparation method of polymer DFB gratings has developed based on photo-polymerization for organic solid-state lasers. A photopolymer formulation sensitive to ultraviolet light is proposed for fabrication of polymer DFB gratings by spin-coating process. A very low surface relief depth ranging from 12.5 to about 1.0 nm has been demonstrated with a refractive index modulation of about 0.012. The experiment results indicate that the polymer DFB gratings are believed to have promising potentials in the fabrication of low-order DFB organic solid-state lasers.
Numerical Modeling of Fracture Process Using Element-Free Method
Authors: Fan Cheng
Published: September 2013

A new element-free formulation of Kriging interpolation procedure based on finite covers technique and Kriging interpolation method which integrates the flexibilities of the manifold method in dealing with discontinuity and the element-free features of the moving Kriging interpolation. Two cover systems are employed in this method. Mathematical cover of the solution domain under consideration are used to construct shape function and physical cover is used to reproduce the geometry of the solution domain. The mathematical covers can take any types of shape and is much easily formed compared with those in the conventional MM. The presented method can overcome some difficulties in conventional element-free Galerkin methods in treating discontinuous crack problems. The fundamental theory of this procedure is illustrated and numerical analyses of examples show that the proposed procedure is an effective and simple method with higher computational accuracy.
Research on Image Mosaic Algorithm Based on Computer Information Science
Authors: Yang Jie
Published: September 2013

With the development of the computer information science and technology, image Mosaic technology has been applied to various fields, which including image compression and amplification, synthesis of images and virtual scene of image design . The algorithm of image mosaic technology research is increasing. This paper analyzes the present situation and application of image mosaic technology and proposes the genetic algorithm of image mosaic technology based on computer information theory. It also constructs the image mosaic technology flow chart. This paper simulates image magnification and synthesis technology in order to prove feasibility and reliability of algorithm by the image Mosaic technology cases. This paper puts forward opinions to the deficiency of mosaic technology and provides a theoretical reference for the application and development of image mosaic technology.
Research on Fast Geometric Precision Correction of HJ-1 Remote Sensing Image
Authors: Jia Zhi Le , Lu Xiao Ping , Zang Wen Qan , Liu Qing Chen
Published: September 2013

As the basis application of remote sensing image ,the satellite remote sensing image geometric precision correction is an important means that to weaken the image itself with the real terrain morphological differences. In this paper, we used HJ-1 satellite CCD data as the research object, using the SIFT algorithm in combination with GPU parallel computing fast extracting and matching feature points, based on polynomial correction model to build calibration system, independent of the HJ-1 satellite imagery geometric precision correction, and achieved a higher accuracy.
A Single Symbol Maximum-Likehood Decoder for Four Transimit Antenna QOSTBC
Authors: Zhang Nai Qian , Jin Li Biao , Wu Guo Cheng , Lin Jie Cong
Published: September 2013

This letter proposes a very low-complexity maximum likelihood (ML) detection algorithm for the quasi-orthogonal space-time block code (QOSTBC) with four transmits antennas. The low-complexity single-complex-symbol detection is based on QR decomposition and the expansion of equalization via a diagonal matrix transformation. The proposed strategy enables the QOSTBC to achieve ML performance with significant reduction in computational load for any high-level modulation scheme.
The Comparison between Chaos Algorithm and Music Algorithm Applied in Weak Signal Detection
Authors: Zhang Chen , Gao Zhen Bin , Li Jing Chun , Huang Biao
Published: September 2013

Chaos algorithm is essential in weak signal detection because of its sensibility to weak signals and immunity to noise. This paper applies subspace algorithm which originates from array signal processing to weak signal detection field because of its lower signal to noise ratio. Firstly, the article introduces the principles of two algorithms, then analyses simulation experiments results of real signal data. After that, a conclusion for two algorithms comparison by estimation of computation cost, complexity of implementation and hardware resources occupied is drawn. At the end, the writer designs a duffing chaos module which is the core part of chaotic detection with verilog-hdl.
Research of the Evaluation Function Based on Improved Neighborhood Difference Operator
Authors: Wang Cheng Yun , Ye Long
Published: September 2013

Automatic focusing is one of the key technology of robot vision and digital video-systems, while play an important role in determining the quality of image. The performance of focusing depends on whether the evaluation function has unbiasedness, unimodality and noise resistance. This paper proposes a new evaluation function algorithm by improving image clarity-evaluation function of the traditional neighborhood difference operator. Compared with the existing algorithm, the results of experiments demonstrated the new algorithm has a good sensitivity, timeliness, good anti-noise ability and stability during the automatic focusing process.
The Signal Processing in Track Irregularity Detection
Authors: Liu Xin Chang , Jiang Qi Zhen , Chai Xiao Dong , Zheng Shu Bin , Li Li Ming
Published: September 2013

In order to overcome the non-uniform property of time domain signal which is obtained in the process of track irregularity detection, design a set of equidistant signal sampling system to collect signal. Use the EMD method based on the criterion of continuous mean square error de-nosing. By integrating the signal get the space trajectory of vector. Experiments show that the track irregularities detection accuracy has been greatly improved.
Algorithm for Maneuvering Target Tracking Based on MATLAB
Authors: Kuang Jiang Ming , Zhang Shuang
Published: September 2013

the theory for maneuvering target tracking is significant to national defense and civil application. The filtering algorithm is one of important components in maneuvering target tracking. After the model of the maneuvering target is built, state vectors in the model are forecast and estimated through relevant filtering algorithms. The Unscented Kalman filtering is a novel filtering algorithm specially used for the nonlinear system, which is characterized by easy implementation, good generality, stable performance and so forth. Compared with the traditional Extended Kalman Filtering algorithm, the filtering algorithm can achieve less tracking error and higher tracking precision.
A Novel Image Fusion Algorithm
Authors: Liu Shan Shan
Published: September 2013

Based on the wavelet transform, this study introduced the theory of the compressed sensing algorithm. Then proposed a wavelet transform based compressed sensing algorithm by the better sparse representation ability of the wavelet transform on the image. Finally, this algorithm was compared with the DCT and wavelet transform algorithm. The experiment results show that the reconstructed image quality has a significant improvement. Especially, this algorithm has better effect on the images with rich curve.
The Development of Topic Model Based on Beta-Negative Binomial Process
Authors: Liu Ya Shu , Yan Han Bing
Published: September 2013

. Topic Model is one of the important subfields in Data Mining, which has been developed very quickly and has been applicated in many fields in recent years. Many researchers have been engaged in this field. In this paper, we introduce the BNB process based on Beta and Negative Binomial distribution, using the hierarchical distribution instead of Dirichlet in LDA. And we give the expression of parameter estimation used by Gibbs sampling. Then, BNB process is applicated in the text topic classification. We design experiments to decide the numbers of topics and compare the BNB process with LDA. Experiment results show that the BNB process has better performance over LDA in English Dataset, but they have almost the same result in Chinese micro-blog topic classification. Finally we analyze the problem and give the idea in further research.
Improvement of Image Mosaic Algorithm Based on SURF
Authors: Long Xu Lin , Chen Qiang , Bao Jun Wei
Published: September 2013

The present study concerns about feature matching in image mosaic. In order to solve the problems of low accuracy and poor applicability in the traditional speeded up robust features algorithm, this paper presents an improved algorithm. Clustering algorithm based on density instead of random sample consensus method is used to eliminate mismatching pairs. The initial matching pairs are mapped onto a plane coordinate system, which can be regarded as points, by calculating the density of each point to extract the final matching pairs. The results show that this algorithm overcomes the limitations of the traditional speeded up robust features mosaic method, improving the matching accuracy and speed, and the mosaic effect. It has certain theoretical and practical value.
The Adaptive Ensemble of OP-ELM Using Forward-Backward Selection
Authors: Han Bo , He Bo , Ma Meng Meng
Published: September 2013

Extreme learning machine (ELM) as a neural network algorithm has shown its good performance in regression or classification applications, but it has a weak robustness. In this paper, a new approach called The Adaptive Ensemble Of OP-ELM using Forward-Backward Selection (AEOP-ELM) is presented, it consists of two significant steps, firstly, we use forward-Backward selection algorithm to select the inputs which will ensure the robustness of the output, then, we train several independent OP-ELM models, and we test them iteratively to find the adaptive weights which will improve the accuracy of the output. The experiments indicate the AEOP-ELM achieves a better robustness than the original ELM as well as a better accuracy.
A Method for Nonlinearity Compensation of the Stabilized Tracking System
Authors: Hu Hong Jie , Zhang Chao , Wu Ye , Wu Xiong Jun
Published: September 2013

The rapidity and tracking accuracy of the stabilized tracking system are mainly influenced by nonlinearity Currently, various methods has concentrated on nonlinear compensation such as optimal control and sliding mode variable structure. However, the optimal control method needs precise mathematical model, and sliding mode variable structure method leads to fluctuations of the output. Thus, this paper firstly builds a physical model of the tracking system, and then designs a differential ahead and disturbance observer (DOB) controller for stabilization loop, and a disturbance observer is used to compensate nonlinearity. A case study of a single-axis motion simulator is presented to validate the proposed method. The experiment result shows that the proposed method can obviously improve the stabilized tracking platforms performance in terms of accuracy and fast tracking ability.
Research of Case Adaptation Method Based on AIA
Authors: Liu Yi , Ma Qu Li , Zhu Jian Chong
Published: September 2013

It is always being a bottleneck to adaptive cases in CBR, how to solve this problem has vexed researchers for a long time. In this paper, Formula for fusing similar cases is used at first, then artificial immune algorithm (AIA) is applied for optimizing the solution. In the end of the paper, in order to compare the superiority of AIA with genetic algorithm (GA) in the process of case adaptation, the model based on AIA is simulated by MATLAB, and the simulation proves that AIA is more suitable for adapting case.
Color Image Retrieval Algorithm Based on Dual Tree Complex Wavelet Transform
Authors: Zhao Xiao Li , Yin Shu Jun
Published: September 2013

A color image retrieval algorithm was presented in order to retrieve image from massive images. This method firstly transformed image from RGB space to HSV space. V component of HSV space was decomposed into three levels by dual tree complex wavelet transform (DT-CWT) to extract high frequency components as texture features. Invariant moments of V component were extracted as shape features. Information of H component of HSV space was extracted as color features. Then three types of features were combined to form feature vector to judge similarity of images. Experiments show that this algorithm has not only high precision and recall but also low time consumption.
Based on Wavelet Transform of TDOA/AOA Location Tracking Algorithm
Authors: Chen Bao Quan , Mao Yong Yi , Yang Yang , Xu Ping
Published: September 2013

In cellular network mobile station location, the actual measured values non-line-of-sight error exists, makes the precision positioning algorithm based on the measured value is lower, aiming at the effects of non-line-of-sight error on the positioning performance, this paper proposes a new algorithm to reduce non line-of-sight error. Using wavelet transform to signal de-noising effect, eliminate the error in the measured value and reuse method of TDOA/AOA location algorithm to estimate mobile station location, with a certain distance threshold to mobile station location tracking. Simulation results show that the algorithm can effectively improve the positioning precision in non line-of-sight environments, positioning result was significantly better than Chan algorithm and TDOA/AOA location method algorithm.
Design of Double-Toggle Clamping Mechanism for Die-Casting Machine Based on the Multi-Body Dynamics and Finite Element Method
Authors: Fu Kai Xuan , Zheng Zhen Xing , Zhang Hua Wei
Published: September 2013

Clamping mechanism was important for the working performance of die-casting machine. There were many factors such as various design variables and complex parameters during the design of the double-toggle clamping mechanism for which the high performance of die-casting machine could not be realized and the expansion force coefficient was small. In this paper, aimed to the design of the large clamping machansim for 25000KN die-casting machine, based on the analysis of the motion feature, the multi-body dynamics equation was construct, and the different design parameters in the optimal design math model were optimized and analyzed with the help of the MSC.ADAMS software. From result, after optimized, it was found that the expansion force coefficient was 23.59, the distance of stroke for the moving platen was decreased 20.3%; the clamping force was added to 3.25+e7N and the course of clamping mould was more stable which mean that the impact exerted on clamping mechanism was reduced. According to the optimized design proposal, the strength check for clamping mechanism was computed by numerical simulation, from the result, the design requirements were realized. And it supplied the technological reference for assurance of quality and performance of die-casting machine, based on which the prototype of 25000KN die-casting machine was manufactured.
Fault Diagnosis Method for Network Control Systems Applying SVM Disturbance Compensation
Authors: Meng Jiao , Xu Qi Hua , Han Lei
Published: September 2013

According to a network control system--NCS with short time-delay and packet loss, an state observer is designed firstly in this paper to obtain a state estimation error equation which is equivalent to an asynchronous dynamical system having event incidence constraint. Secondly, SVM is used to identify interferences of the NCS. Finally, making the identification result as compensation term adding to the state observer can make the residual only represent fault term under ideal condition and increase the robustness of NCS for interference, which can improve the fault diagnosis precision. The simulation results prove that the designed observer can diagnose faults effective and the disturbance compensation based on SVM has attained the expected effect.
The Computer Implementation of an Algorithm for Solving Nonlinear Optimization Problems
Authors: Zhu Da Xin , Wang Xiao Dong
Published: September 2013

In this work, we develop a simple yet practical algorithm for solving nonlinear optimization problems by finding a root of a real function with a good local convergence. The algorithm can be easily implemented in software packages for achieving desired convergence orders. For the general-point formula,the order of convergence rate of the presented algorithm is , the unique positive root of the equation .
An Algorithm of Image Coding Based on Compressive Sensing
Authors: Shi Dong Cheng , Xing Yi Dan , Shi Xiao Ding
Published: September 2013

Block Compressive Sensing (BCS) is a image reconstruction model based on CS theory. By use the same measurement matrix to obtain the data in the form of Block × Block. Algorithm meaning to solve the problem that the traditional CS measurement matrix required for large storage, but different block has important influence on reconstruction time and effect. In this paper, find out the optimum parameters of the block. By compared the PSNR and reconstructed image effect under different sampling rate and different block sizes.