bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Face Recognition Technology of Real-Time Video High Performance Similarity
Authors: Yang Zhao Nan , Zhang Shu
Published: January 2015

A new similarity measurement standard is proposed, namely background similarity matching. Learning algorithm based on kernel function is utilized in the method for feature extraction and classification of face image. Meanwhile, a real-time video face recognition method is proposed, image binary algorithm in similarity calculation is introduced, and a video face recognition system is designed and implemented [1-2]. The system is provided with a camera to obtain face images, and face recognition is realized through image preprocessing, face detection and positioning, feature extraction, feature learning and matching. Design, image preprocessing, feature positioning and extraction, face recognition and other major technologies of face recognition systems are introduced in details. Lookup mode from top down is improved, thereby improving lookup accuracy and speed [3-4]. The experimental results showed that the method has high recognition rate. Higher recognition rate still can be obtained even for limited change images of face images and face gesture with slightly uneven illumination. Meanwhile, training speed and recognition speed of the method are very fast, thereby fully meeting real-time requirements of face recognition system [5]. The system has certain face recognition function and can well recognize front faces.
Software Development Model Design of Mobile Internet Client
Authors: Bai Lei
Published: January 2015

With the rapid development of computer and wireless communication technology, multimedia communication on mobile terminals has also been a growing concern of people. Traditional communication mode of the client is too conservative, will produce large errors, strong constraints. To compensate for the shortcomings, a software development model for mobile Internet clients based on embedded video phone is proposed, according to the voice, video and network transmission three areas to improve the stability and precision of the system. Experiments show that the establishment of mobile Internet client model based on embedded video telephony have strong applicability and high accuracy.
The Design of Interactive Multimedia System for Wireless Environment
Authors: Xian Yan
Published: January 2015

With the development of microelectronics technology, photoelectron technology and the wireless network technology, Computer development has entered the era of mobile. The purpose is to research and develop a set of interactive multimedia system for wireless environment. The design of the system is mainly through the wireless network environment, to build a wireless interactive platform, a mobile terminal and a data service center, or between mobile terminal and mobile terminal through the platform for multimedia data transmission and information interaction. The disadvantages of traditional service system is the space limitation, while the new technology will make it up. As a result, the research value of applying interactive multimedia technology into wireless environment is very high.
Technique for Denial-of-Service Intrusion Detection Using Non-Subsampled Shearlet Transform
Authors: Lei Yang , Ma Jing
Published: January 2015

In this paper, an efficient anomaly analysis method that is proved to be more efficient and less complex than the existing techniques has been proposed. The approach relies on monitoring the security state by using a set of accurate metrics. The Non-Subsampled Shearlet Transform (NSST) is used to decompose these metrics. Attacks are viewed as singularities that arise in some specific points of time. Therefore, the anomaly detection process is performed through processing the signals representing the metrics. Experimental results indicate that the proposed technique is effective and promising.
A Novel Design Method for Filter/Guidance Simulation System
Authors: Wang Yu Zhe , Su Hang , Wang Min , Xue Hui Wen
Published: January 2015

A filter/guidance simulation toolbox based on Matlab software was designed. Built under the principle of “define once and use many times”, the propose toolbox successfully separate the estimation algorithms, the guidance law, and the math model under investigation into three different yet related parts, which drastically reduced the burden of repeatedly designing the same filters and guidance law for different simulation models. Typical example from both simulation cases and real field test data proved the correctness and effectiveness of the proposed toolbox.
A New Method of Preparation of Photo-Thermal Conversion of Ceramifiable Coatings
Authors: Jiang Xiao Shu , Wang Jian Xin , Xu Fang Lei
Published: January 2015

Photo-thermal conversion of ceramifiable coatings were prepared by poly(siloxanes), glass and Al, CNTs powders as adhesive and pigment, respectively. The influence of Al concentration, curing temperature, single-doped, double-doped on the property of photo-thermal conversion was systematically investigated. The detailed results of experimental investigation indicate that the thermal emissivity of coatings composite with Al would slightly elevated after curing at 500 °C, after curing at 700 °C, the thermal emissivity of these coatings have litter to do with the Al concentration. The coatings composite with 40% Al and 10% CNTs after curing at 500 °C exhibited superior in photo-thermal conversion property.
Comprehensive Strengthening of Microalloyed Pure Gold
Authors: Yuan Jun Ping , Ma Chun Yu , Wang Chang
Published: January 2015

The hardness of pure gold jewellery is low which makes it difficult to meet structural design and performance requirements, and restricts its artistic value. In this research, scandium, calcium, and magnesium were used as alloying elements with pure gold, and the microstructure and hardening behaviour of modified pure gold were studied through cold-working, solid solution, and aging treatment. The results showed that the as-cast hardness of an Sc-Ca-Mg alloyed pure gold could reach HV64: after solution treatment at 700 °C, the hardness could reach HV55, and the microstructure in its solid solution state presented a homogeneous single phase. When the modified pure gold was deformed and the deformation rate reached 80%, the hardness reached HV118, after aging treatment at 250 °C and small precipitation phases were dispersed in its structure; the resultant grain size was finer than that of pure gold, and the hardness reached HV133. The hardening behaviour of this modified pure gold was the comprehensive effect of solid solution strengthening, fine-grain strengthening, deformation strengthening, and precipitation strengthening.
Decomposition of Fertilizer Use Intensity over 2004-2011 in China
Authors: Pan Dan
Published: January 2015

This study uses a complete decomposition method to analyze the nature of the two factors that influence the changes in fertilizer use intensity by crops: fertilizer use efficiency effect and crop structure change effect. We find that: the reduction of fertilizer use efficiency was the main factor in the growth of fertilizer use intensity in the aggregate agricultural economy, while the structure change had a minor effect on lowering fertilizer use intensity; the crop structure change effect and fertilizer use efficiency effect both have positive effects on the growth of fertilizer use intensity in grain crops; the decline of fertilizer use intensity by economic crops was largely due to the crop structure change from high fertilizer use intensity type to low fertilizer use intensity type, while the increase of fertilizer use intensity by horticultural crops was mainly attributable to the structure change effect.
Degradation Behavior of Pure Polystyrene Subjected to Two Natural Climate Types and the Simulated Effect of Artificial Accelerated Weathering
Authors: Guo Yan Fen , Tao You Ji , Jie Gan Xin , Wang Jun , Zhang Xiao Dong , Hu Li Fen , Liu Xin
Published: January 2015

Pure polystyrene (PS) was subjected to natural weathering in Qionghai (QH) and Ruoqiang (RQ) of China, representing hot and humid climate and xerothermic climate respectively. The degradation profile of pure PS was studied by Fourier Transform Infrared (FTIR) Spectroscopy, Differential Scanning Calorimetry (DSC), Scanning Electron Microscope (SEM), X-ray Photoelectron Spectroscopy (XPS) and Spectrophotometer. Artificial accelerated weathering tests protocol A and B were carried out to simulate hot and humid climate and xerothermic climate respectively. Results show that pure PS degrade slowly at the initial stage and then become faster. Color shift could be an appropriate indicator for evaluating simulated effect of artificial accelerated weathering and protocol A simulate hot and humid climate perfectly while protocol B turns out weak for xerothermic climate.
Design Method and Study on Water Stability of Warm Mixing Regeneration Mixture Based on Interface Effect
Authors: Chen Hui Qiang
Published: January 2015

The paper introduced the design procedure and design method of warm mixing regeneration mixture AC13. The water stability of warm mixing regeneration mixture was studied systematically with Evotherm warm mixing agent and self-prepared interface dispersant, the form change of old asphalt membrane and old aggregate in RAP was analyzed based on interface effect, and the optimum interface dispersant dosage was determined on this base. Results showed that: with the the interface dispersant dosage rising, significant changes of the TSR and splitting strength frozen-thawed before and after of warm mixing regeneration mixture occurred; when the interface dispersant dosage reached 2‰(based on RAP), both the TSR and splitting strength frozen-thawed before and after of warm mixing regeneration mixture were high,which verified the excellent water stability of warm mixing regeneration mixture; superfluous interface dispersant had negative effects on the water stability of warm mixing regeneration mixture.The exfoliation between old asphalt membrane and old aggregate and secondary coat were realized by interface effect.
Effect of Holding Time on Rheological Characteristics of the Semisolid Magnesium Alloy
Authors: Zheng Xiao Ping , Zhang Wei Wen , Shao Ming
Published: January 2015

The semisolid shear rheological properties of AZ91D alloy were tested. The effect of holding time on the rheological characteristics was investigated. The results show that: during the shear rheological test at 570 °C, a critical shear stress and a maximum shear stress are happened. And with the holding time increasing, solid fraction decreasing and solid particles distributing more uniformly, the rheological rate increases, but the critical shear stress and the maximum shear stress decrease.
Effect of Preparation Conditions on Evaluation of Porous Silicon’s Morphology and Coalition with its Optical Property
Authors: Zhang Xi Feng , Dong Hong Xia , Li Ke Wei , Wang Yu
Published: January 2015

This article presents the dependence of porous silicon (PSi) morphology on preparation conditions and the coalition between morphology and optical properties. p-type (100) silicon wafers were etched in an electrolyte incorporating 1:1 (by volume) ethanol and aqueous solution of hydrofluoric acid (40 wt. %) at various etching current densities and times. Detailed information about evolution of PSi morphology with variation of preparation conditions was investigated by field emission scanning electron microscopy (FESEM) and atomic force microscope (AFM). The results have shown that the pore sizes of PSi are gradually increasing, and the thicknesses of PSi layer are increased with the speed of about 11-12 nm/s as the etching duration increased. Addition, the optimal photoluminescence of PSi is achieved in room temperature with the strongest photoluminescence spectra when the corrosion current density was 30 mA / cm2 with 30 min etching time.
Electrochemical Test Research on Corrosion Resistance of Cable Wires with Different Protection Layers
Authors: Xie Fa Xiang , Chen Lin , Ji Bo Hai , Hu Xing Yu
Published: January 2015

The stay cables are usually subjected to continuous erosion from the environment in their service period. The protective layer on the cable wire is an important barrier for the cable corrosion resistance. Therefore, the durability of the cable depends greatly on the proper selection of the protective layer, which makes a big difference comparing with the bare cable wires. This paper studies on the corrosion performance of 6 common kinds of cable steels under the same corrosion environment with electrochemical test methods. The conclusions can be used as a reference to selecting a proper kind of cable wires during the bridge construction.
Laboratory Study of a Polymer/Surfactant Fracturing Fluid
Authors: Zhang Liao Yuan , Ma Shou , Li Ai Shan , Wu Wei
Published: January 2015

A fluid system consisting of polymer-based thickening agent (ACPAM) and a surfactant (Linear alkyl benzene sulfonate, LAS) is reported. The ACPAM polymer showed good thickening performance. At concentration 0.6 wt%, the viscosity of ACPAM solution reached 265 mPa∙s. ACPAM polymer solution was easily cross-linked by LAS at a wide pH range. The ACPAM gel system can be broken by ammonium persulfate under the temperature of 80~90°C. The residue content of the breaking fluid was low. Meanwhile, the ACPAM fluid system showed an excellent thermal stability & shearing resistance performance. It can be used in high temperature reservoir upto temperature 150°C.
Production of Electricity during Wastewater Treatment Using Fluidized Bed Microbial Fuel Cells
Authors: Wang Xu Yun , Yue Xue Hai , Guo Qing Jie
Published: January 2015

A continuous membrane-less anaerobic fluidized bed microbial fuel cell was used to investigate the effects of fluidization parameters on the electro-genesis capacity of the microbial fuel cell. The experimental results indicated that active carbon particles could significantly decrease the start-up time and increase the output voltage of the fluidized bed microbial fuel cell. At steady state operating conditions, the microbial fuel cell output voltages were 700~900 mV and 600~700 mV for with and without the active carbon particles, respectively. The fluidization behavior of the active carbon particles in the microbial fuel cell reactor is one of the key parameters that influences the generation of electricity. The experimental results indicated that to obtain the optimal electric production performance, an appropriate flow velocity should be determined. The fluidized bed microbial fuel cell could be operated in large-scale wastewater treatment processes with high Chemical Oxygen Demand removal efficiencies that reached 93%.
Research on the TiC Reinforced Steel Matrix Surface Composites Prepared by SHS Casting
Authors: Bai Jing Lei , Lin Tao , Wang Zhi
Published: January 2015

In this paper, TiC reinforced steel matrix surface composites were prepared by vacuum evaporative casting infiltration process and self-propagating high-temperature synthesis. The effect of original composition, binder types and original coating density on the hardness, wear resistance and microstructure of the coating were also studied. The results showed that the Ti and C content was 80% while added 3% PVA, by pressed at 200MPa pressure leading optimal coating quality. Meanwhile the average hardness was 48HRC and the wear rate was 40%.
Study on Treatment of Chromium(VI) Wastewater by Cuprous Oxide
Authors: Zhao Bin , Zou Li Ke , Li Guo Yong
Published: January 2015

Cuprous oxide catalyst was prepared and applied as photocatalist to treat chromium (VI) in wastewater, and the photocatalytic activity of the cuprous oxide was studied. The optimal conditions for the treatment was as follows: the pH of wastewater was 3, the amount of catalysts was 0.3 g/L, the reaction temperature was 60°C. Under the optimal conditions, the removal rate of chromium (IV) in wastewater reached 50% in the presence of cuprous oxide catalyst.
Synthesis of Hydroxyapatite Mediated by Amphiphilic Block Copolymer PS112-b-PAA38
Authors: Bai Xiao Mei , Wang Jiang Wei , Xia Yu Min , Wang Yan Ping , Wang Yi Min
Published: January 2015

The hierarchical hydroxyapatite (HAP), such as needle-shaped, spherical and flower-like, was successfully synthesized by a homogenous precipitation method with poly (styrene)-block-poly (acrylic acid) (PS-b-PAA). The self-assembled “crew-cut” micelles of amphiphilic block copolymer were found to play an important role in directing the nucleation and growth of HAP crystals. The morphology, crystal phrase and chemical structure of HAP crystal were investigated by scanning electron microscope (SEM), X-ray diffractions (XRD) and Fourier transform infrared spectroscopy (FT-IR) respectively.
Numerical Analysis of the Influence of Export Structure on Jet Fan Aerodynamics Performances
Authors: Wang Yu Shan , Pan Di Lin
Published: January 2015

The internal flow of jet fan has been simulated using FLUENT software.By changing the length of exit duct and the angle of the exit cowl,a series of numerical simulation research has been done.The calculation results show that the length of exit duct and structure of exit cowl has obvious influence on jet fan aerodynamics performances and reasonable export structure can effectively improve jet fan aerodynamic performances.
Gas Concentration Distribution Law in the Roadway after Coal and Gas Outburst
Authors: Yang Chun Li , Zhao Yi Liang , Li Xiang Chun , Meng Yang Yang , Zhu Fei Fei
Published: January 2015

Gas emission happens after coal and gas outburst, and it could cause secondary disasters in the roadway. Therefore it is necessary to research gas concentration distribution law in the roadway after coal and gas outburst, and theoretical basis for avoiding the occurrence of secondary disasters could be provided. Based on the above, Fluent is used to simulate gas concentration distribution law in the roadway during outburst. The research results show that gas velocity of the initial stage is larger in the whole process of gas outburst and gas emission impacts opposite walls in the form of jet in the roadway intersection. The flow changes direction and moves along the main airway and return airway. It produces countercurrent along the main airway. Because the pressure in the main airway is high, gas migration velocity becomes zero after a certain distance and is "back" to return airway. The higher the outburst velocity is, the longer the flow length is. Gas concentration variation with two kinds of different outburst intensities and position are regressed and it shows that correlation coefficients of power function are the highest. The research results have a certain theoretical value to prevent the occurrence of secondary disasters after coal and gas outburst.
Optimization of CNC Lathe-Bed Structure Based on Ansys
Authors: Shan Hong Wei
Published: January 2015

This paper proposes the dynamic design method and process of a CNC lathe-bed structure based on ansys. The lathe-bed is an important part of lathe. Structural natural frequency as the objective of optimization, with the element structure and frame structure optimization result as the basis, and with a vertical machining center lathe as an example, we put forward some improvement scheme of the bed structure, and makes a comparative analysis of each scheme.
Intelligent Sensing System for Distribution Line Condition Monitoring
Authors: Bi Ke , Huang Jia Bin , Liu Zhi Wei , Jin Peng
Published: January 2015

Intelligent sensing system for distribution line condition monitoring is presented. It uses sensing terminals to detect load current, temperature, humidity and water pass state. It uses intelligent sensor to collect the distribution condition information. The information collected by the terminals transmits to intelligent sensing system. It is designed without the need for primary equipment reform, without the need of large-scale construction of communication channel, without the need for power blackout with small investment and big benefit. It greatly improves the power supply capacity, efficiency of the system accident treatment and the reliability of power supply.
Fault Diagnosis of New Certain Mine Sweeping Plough’s Electrical Control System Based on Data Fusion
Authors: Zhao Yong , Yang Xiao Qiang , Xu Yin Hua , Li Jian Bin
Published: January 2015

The fault diagnosis of electrical control system of certain type mine sweeping vehicle is difficult due to its complex structure and advanced technique. So in the multi-sensor failure diagnosis process, as a result of various reasons, such as the existence of measurement noise, diagnosis knowledge incomplete and so on, it makes the fault diagnosis uncertainty and affects the reliability and the accuracy of the diagnosis result. This article according to the analysis of electrical control system's fault characteristic of the mine sweeping plough’s, proposes a technique based on data fusion fault diagnosis method. The diagnosis process is divided into the sub system and the system-level, the subsystem uses the BP neural network to classify the fault mode, the system-level uses the D-S evidence theory carries on the comprehensive decision judgment for the whole system's fault. Application shows if some sub-neural network diagnosis has error, using D-S evidence theory fusion can effectively improve the accuracy of diagnosis.
An Efficient Two-Dimension BIST Compression Approach
Authors: Wang Zi Long , Ji Tu , Zheng Mei Song , Wang Jun Ye , Li Li Jian
Published: January 2015

In this paper a two-dimension BIST compression scheme is presented; the proposed scheme is utilized in order to drive down the number of deterministic vectors to achieve complete fault coverage in BIST applications. By introducing shifting compression and input reduction, vertical and horizontal compression are realized respectively to achieve two-dimension BIST compression. Experimental results show that the BIST shifting compression based on input reduction can achieve great compression rate as much as 99%. Comparisons with previously competitive presented schemes indicate that the proposed scheme provide an efficient BIST compression approach with lower storage overhead.
Parameter Estimation and Cramer-Rao Bound in Wideband Bistatic MIMO Radar System
Authors: Li Li
Published: January 2015

The problem of target localization and parameter estimation in wideband bistatic Multiple-Input Multiple-Output (MIMO) radar system is considered. In this paper, we use a novel approach to estimate Doppler stretch and time delay in fractional Fourier transform (FRFT) domain. We also develop two sub-array models to accurately estimate the direction-of-departure (DOD) and the direction-of-arrival (DOA). Furthermore, the Cramér-Rao bound for target parameter estimation is derived and computed in closed form. Parameter estimation performances are evaluated and studied theoretically and via simulations
Research on Ocean Wave Spectra Predicting Based on X-Band Radar System
Authors: Shi Bo Wen , Liu Zheng Jiang
Published: January 2015

A new method to predict ocean wave spectra based on X-band radar is proposed. X-band wave-measuring radar is a new powerful tool to monitor ocean wave, and is the only method that can be used to measure wave spectra onboard and in real-time. This makes wave spectra prediction possible. The real ocean wave is a non-linear process. Through screening time series prediction method based on wavelet neural network is chosen looking at its strong ability on dealing with non-linear problems. The experimental result indicates that this method is of high precision.
Research on Model of Airborne Radar Reconnaissance for Joint Campaign Level Wargame Based on EBI
Authors: Wu Da Yu , Liu Shao Jun , Wang Yan
Published: January 2015

The model of airborne radar reconnaissance is one of key models for joint campaign level wargame. On the one hand the joint campaign level wargame system often needs to simulate hundreds of aircraft in once combat simulation which requires high computing capability. On the other hand, a few aircraft can affect the progress of the war in the information war age sometimes, therefore, modern joint campaign level wargame systems need to simulate single aircraft now. In this paper, we proposes a model of airborne radar reconnaissance for joint campaign level wargame based on EBI(Entity, Behavior, Interaction) modeling framework, which can satisfy both the hardware computing capability constraints and simulation granularity requirement for single aircraft. We also give some key mathematical models and algorithms.
Research of Image Information Extraction Method Based on Structured Light
Authors: Bai X. , Yang Y.Z. , Sheng J.W. , Qi L. , Ma H.H. , Zhang M.S.
Published: January 2015

In line structured light three-dimensional measurement systems, the position of shifted light in the structure light image reflects the three-dimensional profile information of the object. In this paper, according to the characteristics of structured light image, a approach of separating shifted pixels is proposed, and successfully extracts structured light image two-dimensional data with related mathematical methods, which contributes to the foundation for structured light three-dimensional reconstruction of three-dimensional measurement system work.
Simulation of Motion Control for a Modular Robot of Five Degrees of Freedom
Authors: Castillo Estepa Ricardo Andres , Rubiano Montaña Oscar Gerardo , Hurtado Erasso Camilo Andrés
Published: January 2015

This project shows the simulation of a robotic modular system. It has one kind of module, which can couple with two more. The modules have five degrees of freedom (DOF), and can move in four different ways: independent module mode, caterpillar mode, snake mode and wheel mode. The last three kinds of movements need to have several modules coupled. Each module can move either using two pivots at its ends or by using tiny wheels that allow it to move in a direction that is perpendicular to the direction it follows when using its pivots; these gyratory elements also allow the module to rotate around one of its ends. The system controls based on sine functions.
High Precision Synchronous Mechanical Motion Hydraulic Compensation Method
Authors: Liu Hong Jun , Zhi Shu Ya
Published: January 2015

Auxiliary hydraulic system being based on sensor detection is designed to control two execution parts synchronization precision work in main hydraulic lines. To design a servo drive control valve with three working positions, its each position have an oil inlet and two outlets. This valve can come true compensation flow for the single cylinder or all cylinders of the main lines at the same time. Have designed a device is used to control the auxiliary valve-control compensating device by the grating sensor comparison circuit.
Adaptive Cruise Control System: Comparing LQ and MP Controllers
Authors: Liu Ding , Xiong Jian
Published: January 2015

A vehicle longitudinal dynamics model, its inverse model and a following model are established; and then two control applications namely gain scheduling Linear Quadratic (LQ) control and Model Predictive (MP) control are designed for adaptive cruise control (ACC) system; finally an integrated Simulink model including the nonlinear dynamic vehicle model and the ACC controller (either LQ or MP) was used to test the controllers in various traffic scenarios. Comparison results between the two controllers applications is provided to show the validity of the design.
The Design of Indoor Intelligent Lighting Control System
Authors: Jiao Min
Published: January 2015

This article analysis the shortcomings of the current indoor lighting control and its development trend, Proposed one intelligent lighting control system based on the single chip microcomputer and combining with the light detection, pyroelectric infrared sensor. The system can intelligent adjust the lighting according to indoor light intensity, the number of people in real-time. To achieve the purpose of saving energy. Proved by the experiment, the scheme is feasible, and has certain application value.
Analysis of Electrostatic Suspension Kinematic Characteristics of Hollow Be Rotor
Authors: Cheng Xiang Wen , Shi Nan
Published: January 2015

The hollow Be rotor is a spherical rotor with high accuracy, it has been grinded by the four-shaft-ball lapping machine. The rotor is a hollow sphere with non-uniform wall structure and there are errors between geometric center and mass center. Analyze the affect of eccentric distance and harmonic coefficients to the working condition of the rotor, establish the kinematic balance equation of rotor that is solved by Matlab software, and draw the rotor motion law with the change of time. The results indicate that with the decrease of eccentric distance of the rotor, the influence of damped motion decrease significantly. The influence on the damped motion of the rotor can be negligible when the eccentric distance is less than or equal to 0.051μm. The larger the harmonic coefficients, the faster the rotor attenuate.
Velocity Optimal Control Algorithm Based on Hbrid Machine Tool
Authors: Gu Xuan , Li Li Na , Sun Hong Chang
Published: January 2015

Impact and vibration are two of the thorniest technical problems to hybrid machine tool. In this paper, the kinematics principle of the hybrid machine tool was proposed as well as the suppression algorithm, which was based on the velocity optimal control algorithm (VOCA.). And this algorithm was carried out after fine interpolation. It was proved by experiment on hybrid machine tool that the impact was reduced effectively by this way. Account for the velocity optimal control algorithm, the velocity performance of the machine was improved, especially when kinematics calculation error occurred.
Real-Time Traffic Signal Control Based on Kalman Filtering Theory
Authors: Xu Yuan Xin , Yang Wan Ying , Shi Wen
Published: January 2015

Aiming at the problem that individual control of urban traffic lights and stable signal timing. This paper proposed a real timing control method of traffic lights which based on Kalman filter. This method use Kalman filter to predict the next time traffic flows and then update the signal timing. By field researching the traffic flow of intersection in peak hour and predicting the traffic flow. Then update the signal timing. Meanwhile using the VISSIM to simulate the intersection. The result of the simulation shows that the length of vehicle queue decreased significantly and the number of stops dropped. The efficiency of access has been greatly improved.
Grasping Optimization in a Three Fingers Final Effector
Authors: Mauledoux Mauricio , Prada Vladimir , Avilés Oscar F.S.
Published: January 2015

This paper presents the optimization of gripping points of an end effector of three fingers, and this is done by ensuring that the force exerted on the object is minimum. It begins with the design of the gripper has two degrees of freedom (DOF) for each finger. Is performed a brief mathematical description of the kinematics involved in the gripper and with this is determined the work area. With the workspace is determines the points with contact with the object geometry are obtained and these are gripping the possible points of the object. To select which of these points is the best to grab the object, we proceed to evaluate the force exerted on the object by means of the mathematic denominated of Screw. This force should be minimal, avoiding sliding and in turn damage the object. As the contact points are numerous and the evaluating would take quite some time in an algorithm combinational by this reason the optimization algorithm Non-dominated Sorting Genetic Algorithm (NSGA) is implemented.
Research on Underwater Static Electric Field for Warship Based on Hybrid Model
Authors: Bian Qiang , Liu De Hong , Wang Xiang Jun
Published: January 2015

A new method that is to model the electric field of a warship with a hybrid model which is “horizontal current line plus discrete dipoles” is put forward. The majority of the electric field is simulated by horizontal current line, and several discrete dipoles can be used to modify the detail of the electric field. This method is expected to have same precision but more stabilization and less calculation. The method is validated by experiments using a physical scale model of ship.
An Improved Watershed Segmentation Method of Medical Image
Authors: Jiao Yu Bin , Xu Yan Lei , Feng Chao
Published: January 2015

The image segmentation is very important in medical image processing. The paper studies the watershed segmentation, and over-segmentation is the main problem of watershed. Based on this, the paper proposed an improved watershed medical image segmentation method. And the corresponding simulation is done and the result show that the method can resolve the over-segmentation of watershed and can achieve good segmentation.
Hot Corrosion of Inconel 740 Alloys in Na2SO4-NaCl Salts
Authors: Park Soon Yong , Lee Dong Bok
Published: January 2015

The Ni-Cr-Co based superalloy, Inconel 740, was corroded between 700 and 900°C for 20 h in 75% Na2SO4-25% NaCl salt. The scale consisted primarily of Cr2O3, (Ni,Co)Cr2O4, NiO, and Ni3S2. During corrosion, oxidation dominated rather than sulfidation. The scale was neither dense nor compact owing to the formation of the (oxides, sulfides)-mixed scale where Na2SO4and NaCl were incoporated.
An Improved Random Seed Searching Clustering Algorithm Based on Shared Nearest Neighbor
Authors: Su Ya Ran , Niu Xi Xian
Published: January 2015

Clustering analysis continually consider as a hot field in Data Mining. For different types data sets and application purposes, the relevant researchers concern on various aspect, such as the adaptability to fit density and shape, noise detection, outliers identification, cluster number determination, accuracy and optimization. Lots of related works focus on the Shared Nearest Neighbor measure method, due to its best and wide adaptability to deal with complex distribution data set. Based on Shared Nearest Neighbor, an improved algorithm is proposed in this paper, it mainly target on the problems solution of natural distribute density, arbitrary shape and cluster number determination. The new algorithm start with random selected seed, follow the direction of its nearest neighbors, search and find its neighbors which have the greatest similar features, form the local maximum cluster, dynamically adjust the data objects’ affiliation to realize the local optimization at the same time, and then end the clustering procedure until identify all the data objects. Experiments verify the new algorithm has the advanced ability to fit the problems such as different density, shape, noise, cluster number and so on, and can realize fast optimization searching.
A Simple and Effective Method for the Preparation of Porous Graphene Nanosheets
Authors: Sun Jin , Xue Qing Zhong , Du Yong Gang , Xia Fu Jun , Guo Qi Kai
Published: January 2015

Porous graphene is a collection of graphene-related materials which exhibits properties distinct from those of graphene, and it has widespread potential applications in various fields. Several approaches have been developed to produce porous graphene. However, the large-scale production of porous graphene nanosheets still remains a great challenge. Moreover, the costs of some methods are prohibitive for its commercial production and the processes are too complicated and time-consuming. In this work, we propose a simple and green method by which graphene nanosheets can be etched by sodium hydroxide under autogenous pressure at 180 °C. The morphologies and surface elements of the porous graphene nanosheets and sizes of pores were characterized. It is demonstrated that the one-step etching of graphene nanosheets is an effective method to obtain large-scale porous graphene nanosheets with high and uniform porosity. The pores in the porous graphene nanosheets were 6 nm depth (the same as the thickness of the graphene nanosheets) and 30-50 nm width.
A Research on the Securities Brokerage Business in China
Authors: Du Yu Lin
Published: January 2015

This paper analyzes the existing problems in securities brokerage, and the reasons ,then put forward som was to develop the security brokerage,such designing some new products and services and training brokerage staff and designing some Incentive system.
Preparation of Magnetically Separable Composite Photocatalyst: Titania Coated Magnetic Activated Carbon
Authors: Zhang Qing Wei , Xie Wei , Shen Bao Hong , Xie Qiang , Li Xiao Liang
Published: January 2015

In the present work, the embedded-type TiO2/magnetic activated carbon (TiO2/MAC) photocatalysts were prepared. The MAC support was manufactured by one-step method and the TiO2coated on the surface of MAC was prepared by sol-gel method. Its crystalline structural properties, morphology, magnetic performances and pore texture were characterized by XRD, SEM, TEM, ultraviolet-visible absorption spectra (Uv-vis), vibrating sample magnetometry (VSM) and N2adsorption isotherm. Characterization results showed that TiO2was highly dispersed on the surface of MAC support in the form of anatase with a particle size of 10 nm. Obtained TiO2/MAC photocatalysts were applied to treatment of contaminant phenol in aqueous solution. The phenol removal percentage by TiO2/MAC photocatalyst is as high as 94% after three cycles. In addition, photocatalytic degradation of phenol in water was examined using TiO2/MAC photocatalysts. The results show that 4wt% Fe3O4was suitable to prepare the support of TiO2/MAC composite. The phenol removal percentage by TiO2/MAC photocatalyst is as high as 94% after three cycles. However, the adsorption capability of photocatalyst disappears after six cycles, while its phenol removal percentage via photodegradation is still as high as 60%. Meanwhile, the used TiO2/MAC photocatalyst after six cycles still maintains good magnetic stability because the majority of magnetic particles are embedded into the bulk of carbon matrix. And the embedded structure could still meet the requirement of magnetic separation by an external magnetic field.
Optimum Design Method of Sacrificial Layer Release Window for Aperture Cavity Type FBAR
Authors: Gao Yang , He Yi , Zhou Bin , He Wan Jing
Published: January 2015

Sacrificial layer release is the key process step of cavity structure formation of Film Bulk Acoustic Resonator (FBAR), the degree of sacrificial layer release directly determines how good or bad the resonance characteristic of FBAR is. The Constant Diffusion Coefficient (CDC) model numerical iteration of sacrificial layers etching process was simulated with MATLAB, and the etching process was also simulated with Silvaco. According to the simulation results, put forward optimum design of release window. The resonance simulations of FBAR with/without release window have been done by FEA software. The simulation results show that the aperture cavity type FBAR, i.e. the cavity type FBAR with release holes, still has distinct resonant characteristic, but the frequency of impedance zero point and impedance pole of the novel type FBAR are all drifted to higher frequency, and the effective electromechanical coupling coefficient and the quality factor are all reduced.
Establishment of Smart Distribution Grid Evaluation System
Authors: Zhang Meng , Zhao Feng Zhan , Meng Xiao Li , Song Xiao Hui , Yang Ren Gang , Sheng Ye , Ye Zhi Jun
Published: January 2015

This paper analyzes the core values of the smart grid that is the need of significant stakeholders, the reliable and efficient electricity supply for users and running economy for power grid enterprises. Using fishbone analysis gets the main elements, which are the quality and reliability of power supply, grid structure, equipments situation, intelligence level and operation level. Due to the complexity of the evaluation system,the entire system divided into three layer levels,the target layer, the element layer and the index layer. The structure and operation of low voltage distribution grid and medium-high voltage distribution are significantly different,they separate into two systems to evaluate,it can get the evaluation index system. Compared with the traditional distribution grid evaluation system, this system is more comprehensive and systematic for evaluation the development level of the smart distribution grid,it is practically valuable for evaluation work.
Stator Flux Observer for Induction Motor Based on Prescribed Convergence Law Algorithm
Authors: Pan Yue Dou , Chen Ze Ping , Li Hua De
Published: January 2015

This paper proposes a stator flux estimation method for induction motor based on Prescribed Convergence Law algorithm. A stator flux observer is designed and applied for direct torque control (DTC) of induction motor. The observer tracks stator current and its differential with Prescribed Convergence Law algorithm of second order sliding mode in order to estimate rotor flux, and then estimate stator flux using the relationship between stator flux and rotor flux. This paper takes the differential of estimated flux error as disturbance and divides the MIMO (Multiple Input Multiple Output) observer model into two separate SISO (single input single output) systems, which simplifies the stability analysis. The observer is applied to DTC of induction motor and achieves a good control effect. Simulation experiment results validate the proposed method.
EMI Analysis and Suppression of the Ship Digital Grounding System
Authors: Song Wen Wu , Qin Meng Tao
Published: January 2015

Based on the digital serial communication, E1 and Ethernet port circuits connecting the electronic equipment on ships, characterizations of the digital signals transmitted through the circuits are analyzed. The situations when the EMI generated by the digital systems causing pollution to the grounding system and the grounding voltages coupled to the signal-transmitting circuits are simulated. Furthermore, the influence of the equivalent impedance of the main and branch grounding cables on the grounding performance are analyzed quantitatively. Therefore, the grounding demand is obtained. Finally, some anti-interference measures so as to improve the grounding performance are proposed.
Study on the Cable Crosstalk of Ship Cabin
Authors: Song Wen Wu , Qin Meng Tao , Wang Dong Dong
Published: January 2015

The mechanism of cable crosstalk involving what and how does the factors affect the level of crosstalk is introduced in detail. A transmission line model for predicting crosstalk between power cable and the other wires nearby with common reference ground based on multiconductor transmission theory (MTL) is developed. Crosstalk among circuit configurations when the victim cables with load terminations are different types is analyzed and simulated. Models where the types of the victim lines are shielded coaxial cable, shielded twisted pair and unshielded twisted pair are simulated. It is found that the shielding can provide an attenuation of about 50dB than the unshielded cables. In addition, the condition of multi-cable coupling is simulated and some thoughts are brought out to inspire more detailed study. Finally, some measures are suggested to suppress the crosstalk between cables according to the two-type of coupling mechanism (inductive coupling and capacitive coupling).
The VoIP Traffic Flow Analysis of Different Audio Codecs Based on Asterisk in Campus Network
Authors: Ren Bing Zhong , Kong Wen Huan
Published: January 2015

The Internet has revolutionized the telecommunication systems by supporting new applications and services. Voice over Internet Protocol (VoIP) is one of the most prominent telecommunication services based on IP. Asterisk is a popular VoIP services programs. Asterisk supports many of audio codecs. The paper describes the VoIP based SIP, which is built by Asterisk. And it analyzes the bandwidth of G.711, G.726-32 and GSM. From the real traffic flow of audio data, it gets the radio of bandwidth. It provides valuable assessment to design the campus network’s VoIP.
Generation of New Collision Free S-Random Interleavers of Turbo Codes
Authors: Qiu Xuan Feng , Zhao Hong Yu , Fan Ping Zhi
Published: January 2015

For high data rate transmission, the parallel turbo decoding can guarantee high communication reliability as well as reduce the decoding latency greatly. A challenge in the design of parallel turbo decoder is the design of collision-free interleavers in order to avoid the memory access collision in the decoding process. In this letter, a novel algorithm for the generation of collision free S-random interleavers of turbo codes is proposed. The proposed algorithm can obtain larger spreading factor, S, and better average code distance than the existing collision free row column S-random interleavers.
Power-Law Property of High Clustering Network Induced by Deactivation Mechanism
Authors: Dai Rong Rong , Hou Zhen Ting
Published: January 2015

We study the high clustering model of K. Klemm and V.M. Eguiliuz [1]. The basic idea is the growing networks based on a finite memory of the nodes. Our main contributions are as follows: based on the high clustering model, we investigate analytically that it does generate a power-law degree distribution and give the exact solution from the perspective of Markov chain. And the degree exponent varying is depend on the parameters α and m.
Research of Three-Dimensional Layered Network Architecture LDM3 for ITS
Authors: Ruan Ya Duan , Chen Xiang Jun , Chen Qi Mei
Published: January 2015

As Intelligent Transportation System (ITS) grows increasingly in size and complexity, the issues on how to improve interoperability and the performance of processing massive data become more critical. This paper proposes a new three-dimensional layered network architecture called Local Dynamic Map/Multimedia/Management (LDM3) to address these issues. In LDM3, the three-dimensional architecture consists of the information fusion layer newly introduced, as well as the application layer and transport layer. The primitive mechanism defined in the architecture improves the efficiency of the communication of network elements in such heterogeneous network system. By using the standardized format of message and data, the application systems can get desired information pushed by information fusion layer, instead of processing data from all kinds of sensors. This mechanism improves the effectiveness of the whole system significantly by avoiding duplicate work on different application systems. Meanwhile, the workload and the hardware requirement for application systems are relieved. We apply LDM3in the demonstration project for traffic Internet Of Things (IOT) in Jiangsu province. The result shows LDM3is an effective and efficient solution for ITS.
A Novel Improvement on a Crypto-System Based on a Chaotic Map in WSNs
Authors: Bao Xi Rong , Liu Jin , She Li Huang , Zhang Shi
Published: January 2015

Chaotic encryption algorithm is simple, fast speed, no more memory, and suitable for using in wireless sensor networks (WSNs). This paper points out the defect of the iteration encryption and the fact that it’s vulnerable to chosen-plaintext attack. In this paper, a feedback chaotic encryption algorithm is proposed to improve the program that not only effectively avoid the defects, but maintain all the advantages of chaotic encryption algorithm. The improved algorithm is more suitable for small data encryption used in WSNs.
EXIT-Chart-Based Design Method for Noncoherent LDPC-Coded Modulation in Correlated Rayleigh Fading Channels
Authors: Chen Yen Ming , Chen Kuan Chun , Ueng Yeong Luh , Wei Ruey Yi , Hsu Jen Yuan
Published: January 2015

In the paper, we investigate LDPC-coded differential amplitude/phase modulation (APM) schemes for correlated Rayleigh fading channels. Through the observation for the mutual information of the extrinsic log-likelihood ratio (LLR) values of the variable nodes in the LDPC decoder, it is found that the code design methods investigated in the previous literature loses their accuracy. Consequently, a modified code design method for the outer LDPC code is proposed in this paper. It is shown that the searched LDPC code effectively improves the error performance, when compared to the convolutional-coded scheme investigated in the previous literature.