bluuebunny/crossref_metadata_2025 huggingface dataset:
Volume Water Content Prediction of Variable Bulk Density Soil Based on Spectral Characteristics
Authors: Chen Zhen , Cai Lan
Published: June 2013

In order to eliminate effects of soil bulk density variance and soil properties difference on soil water content forecast precision, a method was proposed to forecast soil volume water content based on near-infrared spectroscopy. This paper investigated relationship between volume water content and near infrared spectral reflectance characteristics in 900-2500nm band, used spectral parameters and support vector machine to built quantitative prediction model for three type variable bulk density soil volume water content, normalized signal characteristics by relative dry soil characteristic vector, putted forward three further processing methods. It was used support vector machine (SVM) method to establish spectral characteristics inverting soil volume water content model of undisturbed soil, and model parameters were optimized by genetic algorithm, through predict error comparison, the final determination was that relative characteristics variation of first-order derivative signal as model input characteristic vector, GA-SVM model prediction had best effect and its forecast error was 1.7866.
Freescale Microcontroller Minimum System and Peripheral Modules Design
Authors: Cao Bo Yan , He Hong , Wang Xiao Li
Published: June 2013

A wide variety of current embedded microcontrollers like 8,16 and 32-bit of Freescale Micro Control Unit(MCU) performance is stable and various. Mc9s12xs128 is a kind of Freescale 16-bit microcontroller. The concept of the Freescale Microcontroller Minimum System and the principle of realization is systematically elaborated. Many peripheral module such as Serial Communication, Liquid Crystal Display(LCD), keyboard scanning and Digital Tube Display are developed after a thorough understanding of the basic theory of Minimum System. In addition to this work, a very detailed description of each module's hardware design and software programming methodology is also made to show that an embedded system can achieve a specific function.
Quantum Dots Luminescence Materials and its Applications in Display Devices
Authors: Bi Ke , Gao Wen Zhu , Zhang Tie Qiang , Xu Tian Yue , Zhai Wei Wei , Zhang Yu
Published: June 2013

A new display technology is being developed that uses quantum dot materials, the luminescence with different color different dot sizes from CdSe quantum dot made by us is presented. The fabrication methods, the luminescence behaviors for the materials are also reviewed. A bright future of the applications of the quantum dots luminescence materials and its applications in display devices is described.
Real-Time Investigation of Thermal Poling Process in Optic Fiber
Authors: He Jian , Chen Zhe , Luo Yun Han
Published: June 2013

Thermal poling could make centrosymmetric fused silica optical fibers generate second-order nonlinearity effect and linear electooptic effect. In order to investigate the influence of thermal poling parameters on linear electooptic effect, a real-time test system, which mainly consists of an all polarization maintaining fiber Mach-Zehnder interferometer, has been utilized to monitor the whole thermal poling process in fibers. The processing parameters in thermal poling, such as applied poling voltage, poling duration and temperature, have been measured in real time. Based on those measurements, their influence on the linear electrooptic effect has been discussed. Experiment results show that the linear electrooptic coefficient would increase when a stronger electric field is applied on fibers. Considering the anti-high-voltage breakdown capability of fibers, a DC voltage from 3KV to 4KV is suitable for polarization in thermal poling. When using 3KV, the optimum poling duration is about 16 minutes and the best temperature for thermal poling is around 190°C.
Keywords: electro-optic effect, poled fiber, thermal poling, real time test system, fiber optic interferometer
Research Optical Characteristics of H2S Molecule Adsorption on Agn (n=2,4,6) Clusters
Authors: Zhou Hong , Wang Jun Feng , Wen Jun Qing , Cheng Wei Bin , Wang Jun Fei
Published: June 2013

Density-functional theory has been used to calculate the energetically global-minimum geometries and electronic states of AgnH2S (n=2, 4, 6) clusters. The lowest-energy structures of Ag2, Ag4, Ag6, Ag2H2S, Ag4H2S and Ag6H2S clusters were obtained, respectively. The calculation results show that the lowest-energy structures of Ag2, Ag4and Ag6clusters are planar geometries. The binding energies of Agn(n=2, 4, 6) clusters are gradually increasing in our calculations. Compare the infrared spectrum peaks of Ag4cluster with that of Ag6cluster, which show that the peaks shift to shortwave. After adsorption, we found that the peaks shift to shortwave by comparison.
Numerical Modeling of the TBM Disc Cutter’s Kinematic Behavior during its Wear Process and Experimental Verification
Authors: Tan Qing , Zhu Zhen Huan , Xia Yi Min , Xie Lv Jian , Sun Xin Jian , Li Bin Hua
Published: June 2013

In order to determine the disc cutter’s kinematic behavior, a 3-D FEM model is established to simulate the rock cutting process in Abaqus, using a unique connector element and considering the failure effect of the rock. Then, by using this model, a series of numerical simulations during disc cutter’s wearing process have been performed. The results show that the speed zero point is jumping near the deepest rock breaking point, the rotating speed of the disc cutter varies while it is cutting rock and the average rotating speed increases during its wear process. In the end, the laboratory test is presented in detail, and the experiment results are in accordance with the simulation results.
A Multi-Agent Cooperation System Structure for GWSN
Authors: Jian Yu Mei , Chen Ming
Published: June 2013

According to the characteristics of GWSN, a Multi-Agent cooperation system structure of GWSN is put forward based on the complexity and changeableness of water area and biologic growth. In this structure, the Agent is divided into mobile Agent and static Agent. Static Agent is responsible for collecting data, and mobile Agent is responsible for move between clusters. Each cluster cooperation agents are responsible for data transmission and the data fusion process is divided into four levels. It manages greenhouse wireless measurement and control system by distributed agents’ information timely interaction and cooperation.
The Improvement of Parameters of Manufacturing Process on Flexible Surface Acoustic Wave Device
Authors: Hsieh Tsung Chi , Chen Kuan Ju , Lin David T.W. , Juang Yang Der , Hu Yuh Chung
Published: June 2013

This study issues the improvement of the parameters of manufacturing on the flexible SAW device. The better piezoelectric characteristics of ZnO film will be obtained. The Sol-Gel method is used to prepare the ZnO solution and deposits ZnO film by spin coating process. X-ray diffraction (XRD) and scanning electron microscope (SEM) are used to get the crystalline property. The results reveal that ZnO film possesses better crystalline property in 400RPM of spin speed. The piezoelectric intensity of (002) direction is 1566.67 (a.u.) and atomic morphology of ZnO film are exhibited by SEM image. This better ZnO film will enhance the wave propagation of surface acoustic wave (SAW) device. It can also expand the application of SAW device.
ARMA-AKF Model of MEMS Gyro Rotation Data Random Drift Compensation
Authors: Su Wei Peng , Hao Yong Sheng , Li Qi Chang
Published: June 2013

Application of MEMS angular rate gyro attitude when monitoring for long-term, zero-point drift and random error in cumulative points after long-term monitoring errors can significantly increase the measurement error. Using ARMA model of MEMS gyros random drift modeling and error compensation method using Adaptive Kalman Filter, which increases gyro attitude measurement of long-term reliability Last experiment. The method in accordance with the principle of time series analysis, integration of observations and estimates of actual system so that it can reflect the influence of external disturbance and noise on the system. It can also reflect the influence of system disturbance on actual system performance improves estimation precision.
Optimization Configuration of Servo System in CNC Machine Tool
Authors: Wang Yi Chen , Yu Xiu Xia
Published: June 2013

Base on optimization configuration of servo motor and motor modules. The servo encoder module, power module, PPU, drive system and accessories, controller of CNC machine tool is reasonable selected. In this paper, take a vertical machining center for example, the whole machine's servo system is selected, based on this instance, the method of selection is introduced. Through test analysis of measured data, rationality and feasibility of the method about servo motor and motor module’s optimized configuration is proved.
Vertex-Distinguishing Total Coloring of mC5
Authors: Chen Xiang En , Ma Yan Rong , Yang Fang , Ma Chun Yan , Yao Bing
Published: June 2013

We get vertex-distinguishing total chromatic number of mC5 in this paper
Covering Set-Based Inner-Cluster Data Aggregation Scheme for Wireless Sensor Networks
Authors: Guo Jiang Hong , Luo Yu Dong
Published: June 2013

For reducing the communication overhead of data aggregation, authors proposed an covering set-based inner-cluster data aggregation scheme for wireless sensor networks. The network is clustered upon deployment; nodes achieve the inner-cluster neighbors’ identifiers by information exchanging and transmit the list of inner-cluster neighbors to the cluster head to help the cluster head deducing the inner-cluster covering set. Each node selects a neighbor form inner-cluster covering set as reference point and keeps silent if it has the same reading with reference point. Simulation shows that the proposed scheme lowers the communication overhead of data aggregation effectively.
The Hardware Design of Tropical Crop Monitoring System Based on ZigBee Wireless Sensor Network
Authors: Jin Zhi Yang , Wang Feng Xia , Liu Yan Xia , Li Jin Song , Li You Jun
Published: June 2013

This article has minutely designed the hardware structure of the tropical crop monitoring system in which Zigbee wireless sensor network is used to collect and monitor the information of tropical trop environments temperature and humidity. A system hardware circuit is also given in this article to meet the requirements of the tropical crop rubber monitoring.
Portable Quantitative Fluorescence Immunoassay Analyzer
Authors: Xie Meng Yuan , Zhang Jun , Gu Wen , Chen Zhe , Yu Jian Hui
Published: June 2013

The article introduces a portable quantitative fluorescence immunoassay analyzer which is based on the principle of fluorescence immunoassay and immunochromatographic assay, the analyzer can quantitatively detect the concentration of C-reactive protein (CRP) in human blood. After the immune reaction between CRP and fluorescent marker, they gather around the test line on test strip. The analyzer detects the fluorescent of CRP and calculates concentration of CRP in the sample according to standard working curves of the analyzer. The results show that the linear detection range of the CRP concentration by this analyzer is 1~27 mg/L, the technical specifications have reached the requirements of clinical test.
A High-Precision Marine Ambient Noise Sound Pressure Monitoring System
Authors: Li Lei , Liu Jun Li , Lv Cheng Xing
Published: June 2013

A high-precision marine ambient noise sound pressure monitoring system is developed based on the Michelson interference, a method of improving the measurement accuracy is presented by signal modulation and compensation. Experiments show that the monitoring system has a wide dynamic range and high accuracy especially in low-frequency.
GPR Target Detection Based on Fractal Dimension
Authors: Li Chang Hai , Liang Yong Sheng , Zhu Kong Qiang , Liu Yan Chun
Published: June 2013

To achieve rapid target detection by GPR (Ground Penetrating Radar),the article introduces fractal dimension as the characteristic to describe the complexity of the one-dimensional discrete signal and puts forward an algorithm for rapid target detection by GPR. First, calculate the fractal dimension of signals at different points in the direction of the survey line and depth direction after wavelet transform processing to obtain the curve of fractal dimension on two directions. Finally, determine the suspicious region in the curve of fractal dimension based on the judgment criterion to fulfill target detection. The measured data testify that the method can achieve the rapid detection on a specific target in a certain context.
Motion Simulation of Underwater Mooring Platform with Ocean Current
Authors: Zhao Fang Ze , Song Bao Wei , Du Xiao Xu
Published: June 2013

Underwater mooring platforms which anchored by the anchor and cable have a certain function of the platform mooring at a certain depth. In this paper, the motion model of underwater mooring system was built through analyseing the motion characteristics of the cable geometry and the force of the cable. And the motion simulation of underwater mooring platform with ocean current was done. The results show that the motion of underwater mooring platform is stable.
Productivity-Prediction Model of Acid Fracturing Horizontal Well in Fracture-Cavity Reservoir
Authors: He Yang , Li Yong Ming , Zhao Jin Zhou , Zhang Ye , Lin Tao , Mi Qiang Bo
Published: June 2013

Due to the particularity of the fracture-cavity reservoir space, the seepage theory developed from homogeneous reservoir cant be applied to predict the productivity of fracture-cavity reservoir. This paper simplified the fracture-cavity system to an oil storage vessel, and based on the basic principles of material balance, established the productivity-prediction model which was suitable for the acid fracturing horizontal well in fracture-cavity reservoir. The results showed that the productivity of fracture-cavity system was high and steady. Meanwhile, the connected fracture-cavity system had a greater contribution to increasing production capacity than other factors.
Experimental Study on Reducing Diesel Engine Noise by Using Torsional Vibration Damper
Authors: Zhang Zhi Gang
Published: June 2013

The noise of the engine and torsional vibration of the engine’s shafting is been tested. The engine is a direct injection turbo charge inter-cooling four cylinders one. In the testing, the original pulley and three different torsional vibration dampers are compared.The result shows that it can reduce the vibration of the shafting, triangular belt, the accessory, and can reduce 1 to 2 decibel of the engine’s sound power level by using the torsional vibration damper.
Bayesian Estimate of Exponential Parameter with Missing Data
Authors: Wei Cheng Dong , Wang Fu , Wei Huan Qi
Published: June 2013

We discuss the empirical Bayesian estimation and the noninformative prior Bayesian estimation of Exponential parameter in the missing data occasion. By setting different prior distributions, we get different bayesian risks and compare the numerical simulation results through the MATLAB programming.
A Low Memory Cost Fast Retrieval Method Based on Bucket Map Chain
Authors: Peng Tian Qiang , Sun Xiao Feng
Published: June 2013

To reduce the high memory cost of fast retireval method, we present a fast retrieval method based on bucket map chain on the basis of Exact Euclidean Locality Sensitive Hashing (E2LSH). The bucket map chain contains all the points projected from feature space in multiple buckets, which store the nearby points. When conducting query, it searches the chain by the bucket index of query point and locates the position of related buckets, then reads the related points in related buckets and measurs the similarity of these points with query point. The experiments show that this method can efficiently decrease the memory cost of retrieval. It is very important for increasing the feasibility of large scale information retrieval especially image retrieval.
A Study of Vector-Valued Binary Scaling Functions and Parseval Frames with Integer Dilation Constant
Authors: Lv Bing Qing , Huang Jing
Published: June 2013

Mechanical engineering is a discipline of engineering that applies the principles of physics and materials science for analysis, design, manufacturing, and maintenance of mechanical systems. It is the branch of engineering that involves the production and usage of heat and mechanical power for the design, production, and operation of machines and tools. It is one of the oldest and broadest engineering disciplines. The notion of orthogonal vector-valued binary wavelet packs is introduced. Their traits is investigated by virtue of time-frequency analysis method and finite group theory. Orthogonality formulas are established. Orthonormal wavelet pack bases are obtained. A novel method for constructing a kind of orthogonal shortly supported vector-valued wavelets is presented.
Nonlinear Normal Modes of a Continuous Cantilever Beam with Nonlinear Energy Sink Absorber
Authors: Chen Yong , Xu Yi
Published: June 2013

Using nonlinear energy sink absorber (NESA) is a good countermeasure for vibration suppression in wide board frequency region. The nonlinear normal modes (NNMs) are helpful in dynamics analysis for a NESA-attached system. Being a primary structure, a cantilever beam whose modal functions contain hyperbolic functions is surveyed, in case of being attached with NESA and subjected to a harmonic excitation. With the help of Galerkins method and Raushers method, the NNMs are obtained analytically. The comparison of analytical and numerical results indicates a good agreement, which confirms the existence of the nonlinear normal modes.
Improved the Performance of Focusing Deep Hyperthermia Inductive Heating for Breast Cancer Treatment by Using Ferro-Fluid with Magnetic Shielding System
Authors: Thanaset Thosdeekoraphat , Samran Santalunai , Chanchai Thongsopa
Published: June 2013

The performance improved of focusing deep hyperthermia inductive heating for breast cancer treatment using magnetic fluid nanoparticles with magnetic shielding system has been presented in the paper and the results are discussed. It is a technique challenge in hyperthermia therapy is to control locally heat the tumor region up to an appropriate temperature to destroy cancerous cells, without damaging the surrounding healthy tissue by using magnetic fluid nanoparticles and cylindrical metal shielding with aperture. We show that the magnetic field intensity can be controlled by changing the aperture size to suitable. In addition, the position of the heating can be controlled very well with the magnetic fluid together with shielding system. In the simulation, the inductive applicator is a ferrite core with diameter of 7 cm and excited by 4 MHz signal. Results have shown that the temperature increments depend on the magnetic fluid nanoparticles. In addition, the magnetic field intensity without damaging the surrounding healthy tissue when used magnetic shielded system. These results demonstrate that it is possible to achieve higher temperatures and to focus magnetic field intensity where the nanoparticles and magnetic shielding system are used.
Effect of Aging Process on Organization and Performance of Cu-Cr-Zr-Mg Alloys
Authors: Hou Bin , Zuo Long Fei , Tao Fu Yong , Fang Dong , Chen Xiao Hua , Zhang Hong , Wang Zi Dong
Published: June 2013

The organization and performance of Cu-0.4Cr-0.2Zr-0.15Mg alloy after solution treatment at 960°C for 2h, and then cold-rolled to deformations of 80%, finally aging treatment from 400°C to 500°C in argon atmosphere for various periods from 4h to 16h prior to air cooling were analyzed. Eventually the optimum process was aging at 475°C for 16h. At this process condition, the alloy had an excellent comprehensive mechanical properties and conductivity property of the tensile strength, elongation, and electrical conductivity reaching 549MPa,15% ,and 82.34%IACS respectively. The microstructure of alloy with the best aging process was analyzed by SEM and EDS and TEM shows that the separation phase distributed diffusely on matrix. the main separation phase is Cr phase which mainly exists as simple substance form after age treatment ,the fraction Cr phase forms intermetallic compound with Cu,Zr,Mg. The other phase (as Zr,Mg) exists as intermetallic compound form. The Zr phase doesnt exist as simple substance form.
Study on Production Design with the Evolution of Manufacturers' Sustainable Product Development Behavior in Remanufacturing
Authors: Zong Xian Liang
Published: June 2013

The remanufacturability of product mainly depends on product design and development strategy. Good design will use environmentally favorable materials and produce products with high remanufacturability. But now, most products are designed without considering the recycling and remanufacturing process. It is necessary to study manufacturers product design behavior to find measures to encourage the adoption of remanufacturing techniques including product design methods, the Finite Element Method of bonded strength, failure mechanism of materials, surface engineering techniques and so on. Sustainable product design and development behavior of manufacturer population in remanufacturing was studied. An evolutionary game model with government subsidies was set up. And the evolutionary stable strategies were analyzed under different ranges of values of relative parameters. The results indicated that government subsidies were essential to make manufacturers develop sustainable product and large subsidies always worked well. Especially the results showed that small subsidies also worked under certain conditions, which including the initial state of manufacturer population and the relationship of government subsidies and manufacturers revenues under different product development strategies.
Experimental and Numerical Investigation on the Ultra Large Plastic Deformation Mechanism of Material Application
Authors: Zhang Chao Feng , Wu Mei Ping , Yu Jing Hu
Published: June 2013

Low-yield-strength steel shear panel damper (LYSPD) is widely applied to the seismic system by the large plastic deformation capacity and the damping function. It is designed to dissipate the energy result from earthquake or shocking and keep the main structure intact. Although there are several types of dampers made from low-yield-strength steel (LYS) in the world, the ultra large plastic deformation mechanism (ULPM) is not attached importance on by the past researches. Therefore, in order to clarify the ULPM, both the finite element method and the experimental method are conducted for gaining the strain distribution of the LYSPD. The research results show that the ULPM maybe affected by the interlaminar deformation.
Study on Photochromic Materials with Synthesis, Properties and Application of Photochromic Diarylethene Bearing Fluorine Atoms
Authors: Sun Feng Xia , Pu Shou Zhi , Cui Shi Qiang
Published: June 2013

A novel unsymmetrical photochromic diarylethene, 1-[2-methyl-5-(3,5-difluorophenyl)- 3-thienyl]-2-(2-methyl-5-formyl-3-thienyl) perfluorocyclopentene (1) has been synthesized. Its photochromic and properties have been investigated in detail. Specifically, photochromism in solution and in polymethylmethacrylate (PMMA) amorphous films were studied. The results showed that this compound exhibited reversible photochromism, changing from colorless to blue after irradiation with UV light both in solution and in PMMA amorphous film. The photochromic reaction kinetics indicated that the cyclization processes of 1 belong to the zeroth order reaction and the cycloreversion process belong to the first order reaction. In addition, photomode rewritable optical storage using 1b was performed. The images demonstrated that the compound can be used as optical storage material.
Study on Environmental Materials with the Development of Pure Ultraviolet Irradiator Using Gas Light Source
Authors: Peng Jing Yun , He Yu Min , Xiong Zheng Ye , Shi Wen Qing , Li Yong Qiang , Huang Cun You
Published: June 2013

This paper has presented a method to get pure ultraviolet rays using Abbe prism, and this principle is used to develop a pure ultraviolet irradiator with a low pressure mercury lamp. We used some thermoluminescent dosimeters (TLDs) Al2O3:C crystals to inspect the irradiating effort of the pure ultraviolet irradiator. This irradiator can be used in environmental radiation dose detector with some TLDs such as Al2O3:C and quartz.
Analysis on Casing Size and Steel Grade and Application in High-Temperature High-Pressure Gas Wells
Authors: Li Ling Feng
Published: June 2013

Analysis on casing size and steel grade and application in high-temperature high-pressure gas wells are important in natural gas production engineering. This paper presents the standard casing size series, casing steel grade standard and code, types of casing steel grade, main problems in high-temperature high-pressure gas wells, using casing material suitable as solving means for high-temperature high-pressure gas well and application. For application, the study above is good and easy for on-the-spot application.
Beneficiation of Fe-Mn Minerals in Yunnan Province
Authors: Deng Rong Dong , Liu Quan Jun , Hu Ting
Published: June 2013

The paper recovered the Fe and Mn minerals from a refractory ore in Yunnan province. The grade of Fe in raw ore is 30.16% and the grade of Mn in raw ore is 20.05%. Through technological mineralogy study, we found the Fe was mainly in the forms of Hematite and limonite, and the Mn was mainly in the forms of pyrolusite and psilomelane. Through the process of strong magnetic separation, re-grinding and magnetic separation, the minerals of Fe and Mn were recovered, and the Fe mineral was separated from mixed concentrate successfully. Finally, we got two products. They were Fe concentrate with the grade of 60.35%, recovery of 81.26%, and Mn concentrate with the grade of 37.35%, recovery of 71.26%. This test to increase enterprise efficiency and reduce the environmental pressure is of much benefit.
Numerical Simulation of the Precast Concrete Box Girders Temperature Field Distribution Based on Material Properties
Authors: Du Guang Qian , Shi Dan Hong
Published: June 2013

Due to the large volume concrete special material properties, the casting of temperature stress should not be ignored. In order to analyze the temperature distribution law of the precast box girders,we used finite element numerical simulation of concrete pouring cement hydration , calculated the concrete beams hydration temperature field, and combined with the measured data related analysis and comparison.
Characterization of Shear Bands in Zr64.13Cu15.75Ni10.12Al10 and Zr65Cu15Ni10Al10 BMGs
Authors: Gu Jian Sheng , Bo Hui Feng , Li Hong , Zhang Zhan Xin
Published: June 2013

Shear banding characterization of Zr64.13Cu15.75Ni10.12Al10and Zr65Cu15Ni10Al10BMGs was studied by using Rockwell indention method. Well-developed shear band pattern can be found for both BMGs after indentation. The significant difference in plastic deformation ability can be ascribed to different shear banding features.
Study on Mechanical Automation with Localization for Mobile Robot Based on Color Tag
Authors: Hu Shan , Tian Li Guo , Li Meng , Wu Xing Li
Published: June 2013

Mechanical Automation is playing an important role in all fields. In the detecting system of robot position, how to increase the robustness of color identification is a difficult problem. To solve this problem, a real-time image processing method based on color training is put forward adopting the development platform of the completely independent robot, which is applied in a kind of detecting system at partial structured environments .The method has been already applied well in the visual detecting system of mobile robot.
Study on Mechanical Automation with Optimal Control for Four-Wheel-Active-Steer Vehicle
Authors: Du Feng , Guan Zhi Wei , Yan Guang Hui
Published: June 2013

For improving the vehicle handling at high speed, an optimal controller was introduced for the four-wheel-active-steering vehicle. A closed-loop system was set up by combining vehicle model with driver model. The simulation test in the closed-loop system was carried out to verify control effect of such a optimum controller. Simulation results show that the four-wheel-active-steering vehicle under the optimal control can gain expected control effect such as wiping out sideslip angle and tracking desired yaw rate and so on. In addition, the four-wheel-active-steering vehicle with the optimal control can also track desired trajectory and its following accuracy is better than the traditional front-wheel steering vehicle. So, the steering response characteristic for the four-wheel-active-steering vehicle at high speed is improved.
Study on Based Motion in Improved Radon Transformation with Mechanics Properties
Authors: Xue Yu
Published: June 2013

Mechanics properties of human body mechanical movement have a lot of initiative and variability, especially sports technical movement is the day after tomorrow, spontaneous or consciously form. To a video clip, mechanics properties of human motion reflect the changes which are the important characteristics of the gradual progress in video. If we want to describe the overall content of the video, the motion properties are an essential respect. An improved radon transformation method of feature extraction for human behavior identification is designed in order to solve the sensitivity of the scaling and translation invariant of conventional radon transformation. It deduces the process of the improving method to keep the scaling and translation invariant. The experimental results show that the improving method is low computation and higher recognition rate. Also, it enhances the robustness of feature extraction.
First-Principles Study on Structural and Electronic Properties of the Armchair GaN Nanoribbons
Authors: Chen Guo Xiang , Wang Dou Dou
Published: June 2013

Calculations have been performed for the structures and electronic properties of GaN nanoribbons with armchair edge (AGaNNRs), using the first-principles projector-augmented wave (PAW) potential within density functional theory (DFT) framework. The lowest unoccupied conduction band (LUCB) and the highest occupied valence band (HOVB) are always separated, representing a semiconductor character for the AGaNNRs. In addition, the majority and minority spin bands are fully superposition and therefore the AGaNNRs are non-magnetic. As the nanoribbons width increase, band gaps of AGaNNRs decrease monotonically and become close to their asymptotic limit of a single layer of GaN sheet.
Study on Effects of Mo on Organization and Properties of T700
Authors: Song Zhuo Fei , Duan Bao Mei , Feng Yun Li , Yin Shao Jiang
Published: June 2013

The effects of Mo on organization and properties of T700 were investigated by smelting, rolling and thermal simulation experiment. The results show that yield strength of adding Mo steel is higher in every experimental temperature, and the yield strength is highest in 580°C because the steel of adding Mo has a best precipitation temperature. These results were further confirmed by thermal simulation experiment.
Effect of UV Radiation and Leakage Current on Hydrophobicity of RTV Silicone Rubber
Authors: Wang Jian Hui , Wang Guo Gang , Zhao Yue Ju
Published: June 2013

The effect of UV radiation and surface leakage current on the hydrophobic behavior of the RTV(room temperature vulcanized silicone rubber )silicone rubber was investigated. It's found that the ultraviolet radiation and surface leakage current both could weaken the hydrophobicity of the RTV surface in different degree.
Damage Progression in Unidirectionally Arrayed Chopped Strands Laminates with Different Slit Patterns under Tension
Authors: Li Hang , Wang Wen Xue , Matsubara Terutake
Published: June 2013

This study investigates the damage progression in unidirectionally arrayed chopped strands (UACS) laminates with different slit patterns under tension. Three slit patterns, namely, continuous angled slits, discontinuous staggered angled slits, and discontinuous bi-angled slits, are analyzed based on the cohesive zone model. It is found that the delamination between 0-degree ply and its adjacent plies occurs initiatively at the points of intersection between slits in 0-degree ply and in its adjacent plies. Good agreement is seen from the comparison of numerical results with the previous experiment results. Both results reveal that the discontinuous slit can efficiently inhibit the development of delamination.
Anodic Plasma Electrolytic Saturation of Steels by Carbon and Nitrogen
Authors: Belkin Pavel N. , Naumov Alexander , Shadrin Sergei , Dyakov Ilia G. , Zhirov Alexander , Kusmanov Sergei A. , Mukhacheva Tatiana
Published: June 2013

Review of results in anodic plasma electrolytic saturation of structural steels with nitrogen and carbon in the aqueous electrolytes containing ammonia chloride and required additional constituents is presented. Proposed nitrohardening technology of the medium-carbon steels includes the short-time nitrogen saturation with the following hardening in the electrolyte. Short-time anodic carburizing possibility of the low-carbon steels with following hardening is shown. Treatment samples microhardness is 630±30 HV, their surface roughness decreases from 1.2 to 0.22 μm.
Self-Assembled Au Electrode for Direct Electrochemistry of Horseradish Peroxidase and Detection of Hydrogen Peroxide
Authors: Cui Han , Wang Zhao Hao , Wan Qi Jin , Yang Nian Jun
Published: June 2013

The H2O2 biosensor was prepared by continuous processes: 2,3-dimercaptosuccinic acid (DMSA) self-assembly monolayers gold nanoparticles (AuNPs) film by electrodepositioncovalent immobilization of horseradish peroxidase (HRP). In pH 7.2 phosphoric buffer solution (PBS), the HRP-AuNPs-DMSA-Au electrode exhibited a pair of well-defined cyclic voltammetric peaks in H2O2 solution, and the oxidation peak is about +0.4V versus saturated calomel electrode (SCE). The resulting substrates were characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The biosensor exhibited remarkable sensitivity towards H2O2 and a wide dynamic range of 2-800 μM. The electrode retained 90% of its initial activity after 30 days of storage at 4°C.
Effect of Strain Rate on Mechanical Properties of Pure Iron
Authors: Bao Wei Ping , Xiong Zhi Ping , Ren Xue Ping , Wang Fu Ming
Published: June 2013

Effect of strain rate on mechanical properties of pure iron was studied by compression experiments using Gleebe-1500D thermal simulation testing machine and Split-Hopkinson Pressure Bar, indicating that pure iron only has strain rate hardening effect. Adiabatic temperature rise tends to increase with increasing the strain rate. Work hardening effect is also analyzed. It found that there are only two work hardening regions in static stage (10-3 to 1 s-1) while there are three work hardening regions in dynamic stage (650 to 8500 s-1). It is on account of onset of twining at high strain rates.
Determination of Attack Angle and Tilt Angle of a Cutting Pick
Authors: Sun Yong , Li Xing Sheng
Published: June 2013

Mechanical excavators play an important role in mining and construction. An excavation machine cuts rocks using its cutterhead which is normally composed of a large number of cutting picks. These picks are installed on a drum with certain attack angles, tilt angles and skew angles. These angles, especially attack and tilt angles, will affect the forces acting on individual picks and the cutterhead. To ensure the reliability and productivity of the excavation machine, these angles have to be kept in their optimal values. However, in manufacturing, these three types of angles cannot be set simultaneously. They have to be respectively set one after another. As a result, the angle which is set previously will be changed by the angles which are determined after it. Understanding the relationship between the values of the final angle and the designed angle is important for optimizing drum and pick design. This paper develops a formula for quantitatively analyzing this relationship, with the research scope limited to attack angle and tilt angle only as the first stage of the study.
Study on Fault Simulation for Pneumatic Actuator Model
Authors: Feng Zhi Gang , Zhang Xue Juan
Published: June 2013

Actuator, as the execution of the terminal unit of the control system is directly related to the safe and reliable operation of the production process, and once actuators in the system malfunction, will bring huge losses. The research on pneumatic actuator not only devote to the study of its structure, but also need to study the basic theory of the actuator system modeling, and Laid a foundation for the study of the actuator fault diagnosis. Firstly, this paper introduces the components and working principle of the pneumatic actuators which mainly include three parts: pneumatic servomotor, positioner, and control valve. Secondly, the DABlib modules of MATLAB/Simulink as the simulation model of actuator failure are introduced. Finally, we analyzed the common faults of the pneumatic servomotor, positioner, and control valve, and in the MATLAB/Simulink environment, the faults are simulated, and describes the phenomenon of two typical fault.
The Measurement and Application of a Cesium Optical-Pumping Magnetometer Magnetic Field Gradient Tolerance
Authors: Yang Zhen Yu , Lin Chun Sheng , Yu Jie
Published: June 2013

The space magnetic field is produced by a current-carrying coil. According to the triangle rule, whenever the difference of results measured by the magnetometer between the coil switching the current on and off is less than the calculated value of the coil magnetic field, the magnetometer functional mode is normal. When the magnetometer is at the critical state of the normal work, the coil magnetic field gradient is its gradient tolerance. The Cs-3 optical-pumping magnetometer gradient tolerance is 20000nT/m by experiment. Measurement result can be used for magnetic environment optimization and cesium probe assembly.
The Research on the Encryption Transmission of the Intelligent Robot's Remote Information
Authors: Shi Hui , Deng Yuan Qing , Gong Jing , Li Jia Yu
Published: June 2013

As an important tool, intelligent robot has been widely used in information detection, household service, the old persons’ patrol, business reception, military battlefield, and other fields. Especially in the harsh environment, it is urgently need to adopt intelligent robot instead of human for environmental exploration and information collection. Due to the transmission network security, to ensure that communication data between the intelligent robot and remote operator is private and secure, this paper mainly studied on the encryption scheme of the communication data based on the AES algorithm using the CPLD/FPGA device, working in the mode OFB.
Applied Research of Intelligent Textile Fiber Materials
Authors: Zhang Tong
Published: June 2013

Fiber Materials have a long history of development. As human economy and scientific and technological civilization constantly advance, new type fiber materials have broken through existing concept of fiber, resulting in substantial change in structure, performance, and function, etc. New type fiber materials emerge one after another, including performance fiber, functional fiber and perceptive fiber, etc. Based on the development of new type fiber materials, the paper analyzes technical innovation and application of intelligent textile fiber materials.
Study on Application and Realization of Integrated Control to Medium-Frequency Induction Heating
Authors: Wang Yi Wang
Published: June 2013

A integrated control strategy for medium-frequency (MF) induction heating system is presented in this paper. The output power regulation of MF-induction heating system used repetitive-Fuzzy PID integrated control, which can enhance the ability of the control system to withstand the parameter variations and nonlinear uncertain disturbances, and improve the dynamic characteristic of the control system; the digital phase-locked loop (DPLL) was applied to control the output frequency of MF-induction heating, which reduce the losses of switching components and improve the efficiency of the overall control system. The experimental results show that the proposed control scheme can endow the MF-induction heating power supply system with good steady state and dynamic performance and the power modulation control system can keep better precise control quality, output power adjustment quickly, high output power factor and verify the validity of the proposed integrated control strategy.
The Jacobian Matrix Structure of the Barrier Arm of Inspection Robot
Authors: Yan Yu , Wu Gong Ping
Published: June 2013

The Jacobian matrix represents the relationship of the linear mapping between the space velocity of robot operation and joint space velocity, which is the important link in the process of robot control. According to analyzing the gesture character of the inspection robot when it gets over the obstacles. This paper sets up the dynamitic model of robot by utilizing D-H. Based on that, it builds the Jacobian matrix by adopting differential transformation method, which establishes the foundation of the robots motion planning and real-time control.
Acoustic Emission Monitoring on Crack Growth of Wind Turbine Blade Made of Fiber Glass Epoxy Plastic
Authors: Zhou Bo , Chen Chang Zheng , Gu Yan Ling , Zhou Hao
Published: June 2013

Abstract. To extract the AE signal feature effectively, an automatically operating blind source separation method is presented. The blind deconvolution algorithm is discussed for the non-stationary AE signals to eliminate the noise through minimizing the mutual information to get the separating matrix. Finally, the experimental result is indicated that the mixing noise of the AE signals in the collecting process can be eliminated by this method, and the individual extensional and flexural wave modes can be separated, which can provides the theory analysis basis for the crack recognition of wind turbine blade.
Based on the CFD Technologys Negative Pressure Chamber Air Flow Field Simulation Analysis of the Aspiration Drum Precision Seeding Mechanism
Authors: Wang Yan Jing , Zhang Zu Li , Jiang Yun Ze
Published: June 2013

Through using the ICEM CFD software , we make a model and mesh division to one of the aspiration drum precision seeding mechanisms negative pressure chamber. And we reuse software ANSYS FLUENT to make simulation analysis of the negative pressure chamber for flow field . The conclusion reflects the distributor in the suction of air distribution in the process of the situation correctly. That provides references for distributor structure optimization design, and provides the guidance for experiment so as to save manpower, material resources and the time.
Calculating of the Exit Burr in Low Frequency Axial Vibration Drilling
Authors: Wang Hui Lin , Li Qiao Ying , Zhang Ping Kuan
Published: June 2013

With axial position method, In and out cutting point is accurately obtained in separate low frequency axial vibration drilling. So the working angles of the drill, the cutting force and other parameters are accurately calculated during the cutting time in the vibration drilling. The theory calculating formula of the high of the exit burr is derived based on the forming mechanism of the exit burr in drilling. The calculating result of the high of the exit burr is well identical with the experiment result. This research is based for the parameters optimization in low frequency axial vibration drilling.
Dynamic Performance Simulation of Overhead Contact System for over 350km/h High-Speed Rail
Authors: Ruan Jie , Li An , Yan Fu Wu , Li Hong Mei
Published: June 2013

With full development of 350km/h high-speed rail network in China, further research in the key technology of 380km/h or higher super-speed rail system has become crucial. Applying the simulation of pantograph-catenary interaction based on infinite element method, this paper simulated the dynamic performance of pantograph-catenary system for high-tension overhead contact system at over 350km/h. The research findings showed that wave propagation speed can still serve as a brief computing method for the running speed within the range of 350-400km/h. When the running speed reaches 80% of the wave propagation speed or higher, the current-carrying quality of double-pantograph-catenaries system might not satisfy the standard of EN 50367 all the time.
Finite Elements Prediction of Temperature Field and Thermal Stresses in Thermal Roll of Calendering Process
Authors: Ding Xiao Tian , Zhao Shu Lei , Wei Zheng Yuan , Liu Gui Fang , Lin Qiang , Wu Wei
Published: June 2013

A simplified numerical approach based on the Finite Element Method (FEM) to compute the steady state temperature field and thermal stresses in a thermal roll of a calender machine is proposed. The temperature distributions of the working roll and thermal oil were investigated by fluid dynamics theory. With the acquired roll body temperature, the deformation and stress were calculated. This approach is suitable for fluid-structural and thermal stress problems and hence helpful for the design and improvement of such equipment.
Geometrical Feature Analysis of the Movement of the New Type of Double-Hemisphere Rolling Gear Globoidal Cam Indexing Mechanism
Authors: Tao Xue Heng , Wang Hui Hui , Cheng Jin Shi , Yang Ji Xin , Wang Xue Jun
Published: June 2013

A novel kind of double-hemisphere rolling gear globoidal indexing cam mechanism was proposed，which can satisfy high speed and precision motion requirement. Fundamental principle and meshing characteristics were studied based on conjugate surface principle. Pure rolling of the transmision mechanism was applicated in engineering，and combination property was improved.
Hysteresis Characteristic Model of Suspension for Vehicle Dynamics Simulation
Authors: Guan Hsin , He Rong , Guo Rui
Published: June 2013

Suspension model can be divided into vertical hysteresis characteristic model and suspension guide-mechanism model according to its function. The relationship of the force and displacement is described in the existing vertical characteristic model, which does not consider the impact of the frequency. In the existing guide-mechanism model, the centerline of suspension K&C experimental data is used as the basis of the spindle position and attitude correction, without considering the hysteresis area. The problems above will affect simulation accuracy of vehicle dynamic. In this paper, hysteresis characteristic model of suspension is built. The vertical hysteresis model consists of spring, Maxwell element and Dehl friction unit. While in guide-mechanism model, if the hysteresis region is not obvious, considering the asymmetry, upper and lower borderlines are used to instead the centerline, and if the hysteresis characteristic is obvious, the Fancher formula is used to describe hysteresis range. Results showed out that the model has a high accuracy and is able to accurately describe hysteresis characteristics of suspension by comparison with the suspension system K&C experimental results.
Investigation of Strength and Dynamic Characteristics for the Rolling Mill
Authors: Guo Xi Ping , Zhou Shuang
Published: June 2013

Stress and deformation analysis of 950 mill housing was done by means of ANSYS to calculate the maximum stress and deformation. Strength and stiffness of the mill roll were checked to meet requirements. Carries on the modal analysis to the rolling-mill housing, obtains its first 10 steps the natural frequency and the mode of vibration, through the vibration model diagram analysis frame of the weak link,and it is significant for similar mill housing designs.