bluuebunny/crossref_metadata_2025 huggingface dataset:
FEM Analysis of a Diesel Engine’s Cylinder Head
Authors: Jiang Shao Zhong
Published: March 2012

The article aims at the cylinder head used in a high speed and higher-power diesel engine. In order to obtain the vibration characteristics and vibration frequency distributions. By means of modal analysis technology and finite element method (FEM), structural characteristics of the cylinder head using modal analysis is investigated. Firstly, a physical model of the cylinder head is built. Through the comparison of all the modal analysis results with different meshing densities, a tetrahedron ten-node element with length of 30mm is selected. Then finite element analysis of the model is taken by FEM software. The cylinder head’s modal parameters namely its natural frequency are calculated and its mode shapes are identified. The results can provide basis for the engine’s dynamic analysis and control of the diesel engine’s noise
Adsorption of Heavy Metal Ions with Magnetic Carbon-Coated Iron Nanoparitcles
Authors: Pang Jin Shan , Deng Ai Hua , Mao Ling Bo , Chen Jin , Peng Xiao Jun , Zhu Jie
Published: March 2012

Magnetic carbon-coated iron nanoparitcles were employed as adsorbent to study the adsorption characteristics of some metal ions, such as Cr, Ni, Cu, Pb, Zn. The effect of solution conditions such as pH, amounts of adsorbent, the co-existent ions was investigated. The results show that adsorption property of carbon-coated iron particles to heavy metal ions is improved at the condition of treated by H2O2, and at pH 8-9.5, Cr、Ni、Cu、Pb and Zn were retained on 30mg carbon-coated iron nanoparticles after shaking 3 min, and could be eluted by acid solutions(pH=1~2).
Development of High Silicon Nickel-Copper Alloy NCu30-4-2-1 Extrusion Bars
Authors: Liu De Lin , Jiang Tao , Tao Chun Hu , Yu Yang
Published: March 2012

The rheological stress behavior and microstructure change of high silicon nickel-copper alloy NCu30-4-2-1 during high-temperature compression were studied with a Gleeble-1500 thermal simulation tester. Based on the results, extrusion tests were carried out and a suitable extrusion temperature and extrusion rate range were determined. At these extrusion parameters, the success rate can be significantly improved; in addition, the extrusion bars have superior properties, such as superior strength, hardness, wearing resistance, high-temperature resistance, corrosion resistance, bonding resistance, dimensional stability and machinability.
A Portable Apparatus for Colloidal Gold Test on Clenbuterol
Authors: Yang Zi Jian , Wu Tai Hu , Chen Feng
Published: March 2012

To quantitatively detect the on-site test of the content of clenbuterol in pork, a photoelectric apparatus for the colloidal gold test to detect clenbuterol was developed based on green LED and linear CCD. This design method could realize a semi-quantitative analysis of clenbuterol concentrations ranging from 0 to 1 ng/ml. Such an apparatus could promote an integrated approach to the management of the community food safety
Dynamics of Phase Transformation of Cu-Ni-Si-Zr-Cr Alloy during Aging Precipitation
Authors: Xiao Xiang Peng , Xiong Bai Qing , Wang Qiang Song , Xie Guo Liang , Peng Li Jun
Published: March 2012

The effects of aging temperature and aging time on properties of Cu-2.1Ni-0.5Si -0.2Zr-0.05Cr (wt.%) alloy were studied. The transformation ratio of new phase in Cu-2.1Ni-0.5Si-0.2Zr-0.05Cr alloy was calculated when aging at 400°C, 450°C and 500°C by measuring electrical conductivity, the relation between the electrical conductivity and the quantity of new phase. The Avrami-equation of phase transformation kinetics and the Avrami-equation of electrical conductivity during aging were established for Cu-2.1Ni-0.5Si-0.2Zr-0.05Cr alloy, on the basis of linear relationship between the electric conductivity and the volume fraction of precipitates. The calculated values of electrical conductivity well consistent with those of experiment can provide reference on the alloy of production process. The characteristics of precipitates in the alloy after solution treatment and cold rolling were established, and the results show the precipitate was δ-Ni2Si phase.
Evaluation of Glass-Forming Ability for Metallic Melts by Phase Field Approach
Authors: Wang Gang , Zeng De Chang , Liu Zhong Wu
Published: March 2012

Evaluation of glass-forming ability (GFA) is important in the development of amorphous alloys. Based on phase field theory, the kinetic model of liquid-to-solid phase transition is build, and the time-temperature-transformation (TTT) diagram is plotted according to the phase field simulations of isothermal phase transformation kinetics for a model system. Furthermore, the critical cooling rate for glass formation is calculated on the basis of the TTT curve and is taken as the intrinsic criteria of reflecting the GFA for metallic melts.
Calculation of the Branching Ratio of the Process μ→ 3e in the Hung Model
Authors: Bu Jian Ping , Jia Bei
Published: March 2012

Rich phenomenology is generally expected if the heavy neutrinos responsible via the seesaw mechanism for the small neutrino mass observed in neutrino oscillations are not much heavier than the electroweak scale. A model with this feature built in has been suggested recently by Hung. We analyze the lepton flavor structure in gauge interactions and calculate the branching ratios for the decays due to the gauge interactions in this model.
Evaluation of Highway Maintenance Machinery Configuration Based on Fuzzy Comprehensive Evaluation Method
Authors: Yang Ping
Published: March 2012

Aimed at the problem of the configuration program of road maintenance machinery index difficult to quantify, by using the method of fuzzy comprehensive in highway maintenance machinery configuration evaluation, depicted some fuzzy phenomena with subjective qualitative description , closely integrated quantitative analysis and subjective qualitative description. Try to find a reasonable and workable evaluation approach. So that make the mechanization of highway maintenance and construction more scientific and practical
Design of CO2 Heat Pump Water Temperature Control System Based on C8051F500 SCM and Electronic Expansion Valve
Authors: Fei Ji You , Gao Kai , Deng Ran , Yang Xue Fei
Published: March 2012

The paper has designed the controlling circuit of CO2 heat pump water based on C8051F500 SCM and electronic expansion valve. The controlling circuit is composed of a temperature detection circuit and a electronic expansion valve drive As the temperature detection circuit uses a constant current source design, it would not be influenced by ambient temperature and can work in different temperature environment. This detection circuit’s temperature range is -50 °C - +135 °C. Electronic expansion valve drive circuit has added a photoelectric coupling isolation circuit to enhance its anti-interference capability. The system can adjust the size of the opening of electronic expansion valve according to water temperature. The opening adjustment can reach 480 steps; and the adjust speed is 2 steps per second.
Melt Flow Type and Physical Model of Semisolid Rheo-Casting Process by Cooling Sloping Plate
Authors: Guan Ren Guo , Zhao Zhan Yong , Lian Chao , Chao Run Ze , Liu Chun Ming
Published: March 2012

In this paper, a physical model of semisolid rheo-casting process by cooling sloping plate is established, and the features and parameters of this process are analyzed. The calculation results show that there exists lamellar flow and turbulent flow on the sloping plate surface commonly. The critical transfer distance from lamellar flow to turbulent flow decreases with the increment of the initial flow velocity gradually. The critical transfer distance decreases with the increment of the sloping angle slowly. The effect of the sloping angle on the critical transfer distance is relatively not obvious.
Material Engineering for Low Power Consumption and Multi-Level Storage in Lateral Phase-Change Memory
Authors: Yin You , Alip Rosalena Irma , Zhang Yu Long , Hosaka Sumio
Published: March 2012

The influence of the phase-change materials on the performance of memory devices for low power consumption and multi-level storage was investigated in this work. Doping N into chalcogenide phase-change materials resulted in higher resistivity and low-response to the temperature. The former characteristic leaded to high heating efficiency for phase change via self-heating and thus reduced the power consumption to about 1/20. The latter characteristic enabled easy control of phase change process in the memory device for multi-level storage. 16 distinct resistance levels were demonstrated in our lateral device by adopting a top heater structure
Influence Mechanism of Curing Shrinkage on Tensile Shear Strength of Isotropic Conductive Adhesive
Authors: Yin Rui Ming , Wang Liu Gong , Yang Hua Rong , Liu Piao , Li Jing , Ji Fu Bao
Published: March 2012

Based on epoxy resin, Aradur9506 as curing agent and Flake silver powders, isotropic conductive adhesives(ICA) were prepared, The effects of the functional groups of epoxy resin and the addition of curing agent in isothermal cure on the resistivity of the ECA were investigated by FT-IR method, scanning electron microscopy（SEM）and other means. The results indicated that tensile shear strength declined with the increased in the number of epoxy functional groups and raised with the addition of curing agent, and the tensile shear strength was inverse relationship with the curing shrinkage
Material Constants of TC18 Titanium Alloy Deformated in α+β Region
Authors: Zhao Xin , Zhao Hong , Zhang Rui
Published: March 2012

The hot deformation behavior of TC18 titanium alloy was studied in alpha-beta phase region. The temperature range was 1023-1123K and strain rate range 1-0.001-1s-1. The material constants of the alloy, including deformation activation energy ΔH as 364.823kJ / mol, stress-level coefficient α as 0.0086mm2/ N, stress exponential n as 3.8442 and structural factor A as 1.2601×1015s–1 were derived by Zener-Hollomon method from the interdependencies of flow stress, strain rate and temperature
Finite Element Analysis of the φ320mm Hydraulic Support Column
Authors: Liu Jian Ying , Fang Yue
Published: March 2012

This paper mainly solved the 3D modeling and force analysis of φ320 mm hydraulic support column. According to the hydraulic support column standard, computer simulation was manipulated forφ320mm column by not only 1.5 times rated axis load strength analysis but also 1.1 times rated load and eccentric 30mm buckling analysis. Through analysis and simulation tests，not only the distribution and deformation ofφ320mm column but also the stress distribution and simulation conditions were got about column. Thus, theoretical basis could be provided for the design of column.
Modeling of the Mixing of Composite Solid Propellant Slurry in a Kneading Mixer
Authors: Jiang Ai Min , Li Gao Chun , Tian Ai Ping
Published: March 2012

The mixing process of composite solid propellant slurry in kneading mixers is considered as the research object. POLYFLOW software is employed to solve the problems numerically. Turning the mixing tank instead of the revolution of the impellers, thus the planetary motion is carried out only by the autorotation of the impellers around their own axes. With mesh superposition technique and mesh refinement technique, the impellers and mixing tank are meshed. Visualization of flow process and flow pattern in a kneading mixer is realized and flow fields of velocity, shear stress, viscosity and mixing index are obtained.
Preparation and Character Measurements of ZrO2 Films for RF Magnetron Sputtering
Authors: Gui Tai Long , Wen Ji Ying , Mei Jin Shuo
Published: March 2012

ZrO2 thin films were deposited on glass substrates via RF magnetron sputtering technique and post-deposition annealing treatment.The films transmittance and surface structure were investigated by means of Ultraviolet spectrophotometer, AFM and XRD. The effect of annealing on the optical properties of the films has been studied as well.The research result indicates that the size of ZrO2 film grain obviously gets bigger, the surface is more smooth and transmission rate increases after 800°C, annealing 30min.
Normalized Fuzzy Control of High Density Aquiculture’s Dissolved Oxygen
Authors: Jiang Jian Ming , Bing Shi , Ma Zhen Hua , Zhu Zheng Wei
Published: March 2012

The viscosity of DO(dissolved oxygen) in high density aquiculture is affected by many factors, and its characters have nonlinearity, hysteresis and big-inertial. Normal PID control is difficult to achieve perfect purpose. According to the variety of DO’s viscosity, a fuzzy algorithm was advanced to make system output relevant voltage/frequency to be master of transducer. It can control the electric machine’s rev to ensure the steady DO’s viscosity, at the same time it can also save energy and prolong equipment’s useful time
Standard Plate for Radar Absorbing Materials’ Measurement in 3 mm Band
Authors: Zhao Jing Cheng , Zhang Yu , Yan Hai Lun
Published: March 2012

This paper introduces a new standard reflecting plate’s manufacture, which is used to calibrate the measurement system for radar absorbing materials in 3 mm band. The new standard plate is designed and employed with two reflecting surface, one is a plane, the other one is curve, and metal with high permittivity. It has the nominal reflectivity of -15dB, -10dB, -5dB and has the advantages of high stability, easy manufacture and convenient usage
Processing Maps for TC18 Titanium Alloy Deformed in α+β Region
Authors: Zhao Xin , Zhao Hong , Zhang Rui
Published: March 2012

The hot deformation characteristics of TC18 titanium alloy were studied in the temperature range 750-850°C and strain rate range 0.001-1 s-1 by using hot compression tests. Processing maps for hot working are developed on the basis of the variations of efficiency of power dissipation with temperature and strain rate. The results reveal that the flow stress of TC18 is sensitive to strain rate. Processing map at stain of 0.6 reveals two domains: one is centered at 750°C and 0.001s-1; another is centered at 850°C and 0.001s-1. The maximum efficiency is more than 60%. According to the maps, the zone with the temperature range of 750-850°C and strain rate range of 0.01-0.001s-1 may be suitable for hot working
Preparation and Formaldehyde Emission and Bonding Performance of Novel Modified Urea-Formaldehyde Resin Adhesive
Authors: Gao Zhen Zhong , Yue Chao , Cao Hai Bo , Wang Xiao Bo , Zhu Xiao Feng , Lin Rui Hang
Published: March 2012

Low formaldehyde emission and high bonding strength were two basic criterions of a good urea-formaldehyde resin adhesive (UFRA). In our study, melamine modified methylolurea solution (MUS), was synthesized and used as modifier for UFRA. The bonding strength and formaldehyde emission of urea-formaldehyde resin adhesives(UFRA) were influenced by some factors such as F/U molar ratio of the main resin, F/U molar ratio of modifier, melamine content, mixing ratio of main resin with modifier, which were investigated by a series of single-factor experiments. The results showed that the best adhesive bonding strength of UFRA was 0.93MPa and the lowest formaldehyde emission was 0.43mg / L, when F/U molar ratio of the main resin was 1.5, F/U molar ratio of the MUS was 0.5, the mass fraction of melamine addition level was 5wt.% of MUS, and the mixing mass ratio of methylolurea solution (MUS) to the main UF resin was 20:80.
Self-Lubricating SiC/PTFE Composite Coating Formation on Surface of Aluminium Alloy
Authors: Chen Ming Hua , Kao Kai Chang , Tu Ming Wu , Zhang Dong Na
Published: March 2012

Anodized composite films containing n-SiC and PTFE particles are prepared on 2024 Al alloy by anodization in phosphoric acid-base electrolyte and ultrasonic impregnation and subsequent heat treatment. Results show that the oxide film microhardness increase with n-SiC content and ultrasonic impregnation time increase, the oxide film wear extent decrease with n-SiC and PTFE content increase basically. The composite films formed on optimum conditions have reduced friction coefficients and relatively high microhardness. The friction coefficient can be as small as 0.14, while the microhardness can reach as high as 429 HV, which is much better than that of an oxide film prepared under the same conditions but without adding any particles. This indicates that the synthesized composite films have good anti-wear and self-lubricating properties
Study on Dyeing Technology Affecting the Dye-Uptake of Bamboo Pieces
Authors: Du Chun Gui , Shu Tian Tian
Published: March 2012

The basic unit of bamboo flooring-bamboo piece was used for the dyeing experiments, and the influence was discussed for dyeing technology to dye-uptake of piece, in order to meet market great demand for color diversity of bamboo flooring.The results showed: dye concentration had a major impact on the dye-uptake, appropriate concentration was 1%; dyeing temperature had a greater impact on the dye-uptake, appropriate temperature was 90°C; dyeing time had a greater impact on the dye-uptake, with the dyeing time lengthen, dye-uptake increases; pH value of dye solution had a significant effect on the dye-uptake, the appropriate pH value was 4.5.
Study on the Mechanism of Cutting Fracture of H700X300 H-Beam
Authors: Zhao Jian Qin , Xu Shu Qin
Published: March 2012

In order to find the crack reason of H700X300 H-beam rolled in air-cooling conditions, finite element analysis has been used to study the cutting process. Find that the R position existed serious stress collection when cutting to the central of the web in the cutting process. The stress is three-dimensional stress, and each is tensile stress. It is accord with the Q235 steel brittle fracture law. So the conclusion can be draw, the reason of H700X300 H-beam occur cut fracture is for exist crack, stomata and other defects in the stress collection position. The experiment testify the conclusion
Study of Anticorrosive Properties about Epoxy Heavy Anticorrosive Over-Rust Primer/IPN Topcoat
Authors: Tang Li Ming , Bi Wen Jun
Published: March 2012

The anticorrosive work for pipeline is a basic work. It is significant for us to lengthen pipeline working life and enhance the operation reliability. In this article, the corrosive status and reasons for pipeline in China were narrated. The new anticorrosive coating that epoxy heavy anticorrosive over-rust primer/interpenetrating polymer network (IPN) topcoat was opened up. In the lab, the anticorrosive coating by analyzed with scanning electron microscopy (SEM), and X-ray photoelectron spectrum (XPS). The corrosion behavior of the new anticorrosive coating was studied. The conclusion is that the epoxy heavy anticorrosive over-rust primer/IPN topcoat is superior in anticorrosive properties.
Synthesis and Electrochemical Performance of Li3V2(PO4)3 Cathode Material by Microwave Method
Authors: Zhong Sheng Kui , Hu Hui Ping , Liu Jie Qun
Published: March 2012

Monoclinic Li3V2(PO4)3 was synthesized by a microwave method. The influence of sintering temperatures and time on the synthesis of Li3V2(PO4)3 was investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and charge-discharge test. The results of these tests shows that the Li3V2(PO4)3 sample synthesized at 850 °C for 15 min has pure and perfect crystal. The charge-discharge test shows the Li3V2(PO4)3 sample with optimal synthesis condition has the best initial discharge capacity of 120 mAh/g, with capacity retention of 101 mAh/g after 50 cycles, in the voltage range of 3.0 V–4.2 V.
Synthesis and Properties of a New Unsymmetrical Diarylethene Bearing Two Thiophene Rings
Authors: Li Hui , Tu Yuan Ming , Liu Gang
Published: March 2012

A new unsymmetrical photochromic diarylethene has been synthesized, namely {1-(2,5-dimethyl-3-thienyl),2-[2-methyl-5-(4-trifluoromethylphenyl)-3-thienyl]}perﬂuorocyclopentene. Its properties, including photochromic reactivity in solution and fluorescence property both in solution and in PMMA film were investigated. It underwent reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light. The isomeric compound functioned as a ﬂuorescence switch by photoirradiation both in solution and in PMMA film. The fluorescence intensity also showed regular changes along with the change of concentration.
Intelligent Electronics Vehicle Monitor Based on Map Control
Authors: He Xin Hua
Published: March 2012

According to actual request for vehicle supervise, the map control system that using MAPINFO module is presented. Moreover, diagram layer operation and track control are described detailedly.
Mold Material Selection and Development Trends
Authors: Sun Xiao
Published: March 2012

With wide use of mold in modern industry, to extend its service life has become urgent problem to solve. Based on its usage, components of mold can be divided into 2 parts. One is structural parts which consist of guide, set (dynamic) template, ejecting machine, supporting member, etc. These are usually made of low carbon structural steel, alloy structural steel, or carbon tool steel. the other is molding parts which include cavity, type core, forming insert, etc. these are key parts for direct molding. Because they must bear temperature, pressure, erosion, wear and tear when used, the service life depends on material of them. Appropriate material is the main way to extend its service life.
Application and Analysis of Plane Woven C/SiC Composites Based on Continuum Damage Mechanics
Authors: Chang Yan Jun , Zhang Ke Shi , Jiao Gui Qiong , Chen Jian Yun
Published: March 2012

The aim of this article was to propose a macroscopic damage model, which describes the nonlinear behavior observed on woven C/SiC ceramic matrix composites. The model was built within a thermodynamic framework with internal variables. The anisotropic damage evolution processes of the material were described by nonlinear damage isotropic and kinematic hardening functions in this model. The anisotropic damage and damage coupling were considered with a damage yield function including anisotropic coefficients. Using the principle of energy equivalence, the damage variables were defined by the unloading modulus and initial modulus. The damage variable and the irrecoverable strain induced by micro-crack propagation were deduced by thermodynamics. The constants of constitutive model were identified and the damage evolution processes under tensile and shear loading. Uniaxial tension and shear tests had been used to valid the constitutive model to C/SiC composites.
Multi-Objective Optimization Design for Body Hoist Mechanism of Mining Dump Truck
Authors: Kang Yi Ting , Yang Jue , Zhang Wen Ming
Published: March 2012

The rear multi-stage cylinder direct-acting hydraulic body hoist mechanism is widely used in mining dump truck. The working principle of the body hoist mechanism is introduced. The dumping process is simplified through the introduction of “dumping line” and the variation of ore mass and hoist torque are analyzed. The optimization design of the position of body hoist mechanism is done using Maple software on the basis of direct search method aimed at minimizing the initial hoist force and the stroke of cylinder and maximizing the hoist force arm when the second stage cylinder starts to stretch out.
Design of PCB Engraving Machine System Based on MCU
Authors: Yang Mei , Sun Hong Qiang , Cui Jing Hua , Shi Yuan Ping
Published: March 2012

Design a system of PCB engraving machine using MCU. Design in detail mechanical structure and the system scheme of the engraving machine. Write a software which can converse the file of PCB drawing software output to program for SCM and exchange data between PC and SCM. Choose the right step motor and design driven circuit of step motor.
Properties of Weighted Geometric Means Combination Forecasting Model Based on Absolute of Grey Incidence
Authors: Sun Li Hong
Published: March 2012

weighted geometric means combination forecasting is a kind of nonlinear combination forecasting model. Based on absolute of grey incidence, a weighted geometric means combination forecasting model is proposed. Superior combination forecasting, dominant forecasting method and redundant degree are put forward. Under certain conditions the sufficient condition of existence of non-inferior combination and superior combination forecasting are discussed, redundant information is pointed out in a judging theorem.
A New Chaos Analysis Method: Exclusion Analysis Method and its Application: Simulation and Comparison
Authors: Feng Ping , Wang Wei Jun , Jia Yang , Sun Bo , Wang Er Zhi , Chen Gang
Published: March 2012

In this paper, a new analytical analysis method for chaos: exclusion method is used to analyze ferro-resonance in power system. Its basic idea is that for any systems, there are only four different solution types, that is, constant solutions (equilibrium solutions), periodic solutions, almost periodic solutions and chaotic solutions. If the parameter spaces corresponding to the solutions except chaotic solutions are excluded, the remaining parameter spaces are only the scopes corresponding to chaotic solutions, and then the analytical conditions for the chaotic solutions are obtained. This new method has been applied to the chaos analysis of vibrations equation and electronic circuit successfully. The analytical conditions for chaotic ferro-resonance solutions are obtained for the first time in a recently published paper and the conclusions are proved correct theoretically. In this paper, the resulted conditions are simulated numerically and compared with the Melnikov method to identify the efficiency of the exclusion analysis method. Compared with classical Melnikov method, the conclusion of this article shows that the new method is much more accurate than previous analytical method and is suitable for the system with any degree, especially for high dimensions system.
Design According to the Measurement & Control Platform of the AT91RM9200 Embedded System
Authors: He Pi Yan , Yang Jia
Published: March 2012

In this paper, the design scheme of a Measurement and Control(M&C) system based on AT91RM9200 is proposed. For expanding the test functions, based on the AT91RM9200 control platform the GPIB interface is added in the platform. With the EMAC interface, the automatic test function on multiple communication channels is realized on the GPIB test bus and Ethernet. In this paper, the Modular architecture is used to design the hardware platform. While in the design of the software, the real-time multitasking function of RTOS is combined with the task processing methods corresponding to the interruptions to make the design , building and reusing of tasks more convenient. So that the whole test system can be more common and scalable.
Preceding Vehicle Visual Detection and Tracking Based on Template and Shadow Feature
Authors: Zhang Xiao Hui , Liu Qing , Hou Yun
Published: March 2012

As to the vehicle visual detection and tracking problem in IDASWs (Intelligent Driver-Assistance and Safety Warning System), this paper proposed a way of a good effect. Firstly use vehicle’s bottom shadow feature and identified lane result to determine the searching region. Then use template matching algorithm based on vehicle’s tail shape to realize detecting and tracking. Experimental results show that the algorithm can effectively detect and track the preceding vehicle from the video sequence, reaching robust and real-time requirements
Study on a Novel MEMS High G Acceleration Sensor
Authors: Li Ping , Shi Yun Bo , Liu Jun , Gao Shi Qiao
Published: March 2012

This paper presents a novel MEMS high g acceleration sensor based on piezoresistive effect. For the designed sensor structure, the formula of stress, natural frequency and damping was derived in theory, and the resonant frequency can up to 500kHz. After the structure parameters were designed, the sensor was fabricated by the standard processing technology, and the sensitivity was tested by Hopkinson bar. According to the experimental results, the sensitivity of the high g acceleration sensor is 0.125μV/g at the impact load of 164,002g.
A Variant of Newton Method with Eighth-Order Convergence for Solving Nonlinear Equations
Authors: Fang Liang
Published: March 2012

In this paper, we present a variant of Newton method with order of convergence eight for solving nonlinear equations. The method is free from second derivatives. It requires three evaluations of the functions and two evaluations of derivatives in each step. Therefore the efficiency index of the presented method is 1.5157 which is better than that of classical Newton’s method 1.4142. Some numerical experiments illustrate that the proposed method is more efficient and performs better than classical Newton's method.
Real-Time Implementation AMR-WB Algorithm in TMS320VC5509A DSP
Authors: Li Feng Lian , Zhang Xue Ying , Du Xiao Lin
Published: March 2012

Adaptive multi-rate wideband (AMR-WB) speech codec is the first standard for both wired and wireless universal broadband speech codec. Real-time implementation of AMR-WB algorithm in DSP has important practical significance and will accelerate its course of practice. The paper first designed the hardware platform and system software structure for real-time implementation of the AMR-WB algorithm, then introduced the transplantation of AMR-WB algorithm to the designed hardware system. The paper next discussed the real-time implementation of optimized algorithm on the hardware platform. Objective test results indicated the decoded speeches of real-time platform were bit exactly the same as test sequences. Synthetic speeches of real-time platform were very good in restoring the speaker’s voice characteristics by good intelligibility and naturalness.
Research on the Adjustment Function of Controlling Differential Stage-Less Speed Variator
Authors: Zhang Chun , Li Long , Zha En
Published: March 2012

Basing on the present situation of the controlling differential stage-less speed variator cannot accurate speed control, in a typical PX type differential step-less speed transmission as an example,analyses the moving relationship of various components in the entire device.Then infer the function relation between output speed and the angle of speed regulating handle.Establish the theoretical basis and foundation of the automatic speed control in the controlling differential stage-less speed variator.
Research on the Current Loop of PMLSM
Authors: Liu Ji Zhu , Hao Shuang Hui , Chen Tao , Pan Ming Qiang , Huang Hai Bo
Published: March 2012

Based on the basic vector control theory of motor, the paper deduces the decoupling control theory of PMLSM, and researches on the current loop of PMLSM servo system. Through introducing voltage compensation loop into the current loop, the paper analyzes the influences of the relevant parameters on the response speed of the system in details, and proves the theory that introducing voltage compensation into current loop is actually good for improving the response speed of the system from the perspective of theory and simulation, meanwhile, the paper also analyzes the influences of voltage compensation loop on the stability of the system.
Sample Classification Algorithm Based on Spectral Similarity Calculation
Authors: Deng Ji Qiu , Qiu Lan , Wu Qian Hong , Wang Ying
Published: March 2012

According to the field geological sample classification, a spectral similarity the cluster analysis algorithm (SSCA) has been put forward. This algorithm expands and improves the spectra sort encoding algorithm on the spectral sorting and similarity computation, and adds similarity clustering analysis method. Testing on 100 field geological samples using SSCA algorithm, we get the results showing that this algorithm can make further classification for field geological samples to some extent.
Sensor of Measuring Containing Water Ratio in Crude Oil Based on Multi-Electrode Capacitance
Authors: Gao Xiao Ding , Li Yuan Chao , Nie Zhao Ming , Wang Jia Jia
Published: March 2012

A Multi-electrode Capacitance Sensor for measuring containing water ratio in crude oil and its circuit has been designed. The multi-electrode capacitance sensor is assembled with the structure of combining, which is easy to clean and maintain. By setting up the mathematic model of the measuring method, the function of the changing rate of containing water ratio in crude oil and the equivalent capacitance of multi-electrode capacitance sensor is achieved. A experiment to contrast the measuring containing water ratio in crude oil with pent-electrode capacitance sensor and mono-electrode capacitance sensor has been carried out, proved that comparing with the result of experiment ,the precisions of fifth-electrode capacitance sensor in measuring the containing water ratio in crude oil has been greatly improved. Furthermore whether the containing water ratio in crude oil is high or low, the measuring result by using fifth-electrode capacitance sensor is stable.
Simulation on Composite Backscattering from Rough Surface with Target above it
Authors: Tian Wei , Ren Xin Cheng
Published: March 2012

One-dimensional Gaussion rough surface is simulated and employed by Monte Carlo Method, the composite backscattering from one-dimensional Gaussion rough surface with rectangular cross-section column above it is studied using Method of Moment. The curves of composite backscattering coefficient with scattering angle and frequency of incident wave are simulated by numerical calculation, the influence of the root mean square and the correlation length of rough surface fluctuation, the height between the center of the rectangular cross-section column and the rough surface, the length and the width of the rectangular cross-section column is discussed. The characteristic of the composite back-scatting from one-dimensional Gaussion rough surface with a rectangular cross-section column above it is obtained. The results show that the influences of the root mean square and the correlation length of rough surface fluctuation, the height between the center of the rectangular cross-section column and the rough surface, the width of the rectangular cross-section column on the composite backscattering coefficients are obvious while the influences of the length of the rectangular cross-section column on the complex backscattering coefficient is less.
Study on Fault Diagnosis in Analog Circuit
Authors: Xu Li Jia , Kang Zhi Liang
Published: March 2012

Hidden Markov model (HMM) for the diagnosis of incipient faults in analog circuits is presented. Firstly, output voltage signals under faulty conditions are obtained with simulation. Subsequently, output voltages corresponding to the test frequencies are extracted from the response of analog circuits. Finally, the output voltage vectors are used to form the observation sequences, which are sent to training HMM to accomplish the diagnosis of the incipient faults. The performance of the proposed method is tested, and it indicates that the method is effective and has better recognition capability than the popularly used back-propagation (BP) network.
An Improved Ant Colony Optimization Algorithm Based on Immunization Strategy
Authors: Nan Yang
Published: March 2012

Ant colony optimization has been become a very useful method for combination optimization problems. Based on close connections between combination optimization and continuous optimization, nowadays some scholars have studied to apply ant colony optimization to continuous optimization problems, and proposed some continuous ant colony optimizations. To improve the performance of those continuous ant colony optimizations, here the principles of evolutionary algorithm and artificial immune algorithm have been combined with the typical continuous Ant Colony Optimization, and the adaptive Cauchi mutation and thickness selection are used to operate the ant individual, so a new Immunized Ant Colony Optimization is proposed.
A PSO-Based LQR Controller for Accelerator PWM Power Supply
Authors: Zeng Xian Qiang , Jing Lan , Yao Ze En , Guo Yu Hui
Published: March 2012

In this paper the method of Linear Quadratic Regulator (LQR) is employed for controlling accelerator PWM power supply, and improving its dynamic functioning. A method based on the Particle Swarm Optimization is proposed to optimize the weighting matrix Q and R. In order to control the dynamic behavior of the power supply, the fitness function of PSO is acquired considering the needs of the power properties. The results of simulation proved that the proposed method was much better than simple LQR method and LQR-GA method, and the performance of the power supply was improved dramatically.
A Rapid Vote-Counting System Based on Image Understanding
Authors: Xiao Gang , Zhang Jing Jing , Zhang Yuan Ming , Lu Jia Wei , Ye Zhi
Published: March 2012

This paper proposes a system, which can rapidly count votes in traditional elections based on image understanding. Firstly, the system gets ballot images through high-speed scanner and preprocesses the images. Then, it recognizes the geometric structure and layout of ballot image through detecting table lines. In addition, it also recognizes the logical structure of ballot image through analyzing the relative positions of candidates and vote symbols. Thirdly, it locates candidates and symbols on the ballot table, and recognizes the specific symbols based on run features. The system has been implemented, which shows high counting speed, high recognition accuracy with wide applicability.
The Research and Development of a New Type of Metal Wire-Buckling Machine
Authors: Liu Yue Hui , Liu Wen Xue , Shan Gen Li
Published: March 2012

Designing of a new type of metal wire-buckling machine, introducing the overall structure, operational principle and control flow of the equipment. The machine can realize the feeding, straightening, cutting off, shaping, returning material procedures of the metal wire automatically, with features of high degree of automation, compact structure, good quality and high efficiency.
The Study on Accounting Information System Application Controls and Administrative Controls
Authors: Yang Hua
Published: March 2012

As the system of records that a business keeps to provide financial information, AIS has based its design on some fundamental principles. An accounting system is comprised of accounting records and a series of processes and procedures assigned to staff, volunteers, and/or outside professionals, which traditionally includes source documents, special journals, subsidiary journals and general journals. In recent years, because of the development of IT industry, manual-based accounting information system has been replaced by AIS. AIS brings with a set of new problems. The internal controls that have been put into place for a manual system to help the internal auditor cannot fully prevent or minimize the possibility of errors or fraud that come with the computerized systems. Therefore the old controls must be modified for the new system and new controls must be put in. Only then can the internal auditor ensure that the number of errors that occur within the system be minimized or even eliminated.
The Temperature Control of Electric Furnace Based on PID Genetic Algorithm
Authors: Lu Di , Wang Jian Xin , Li Jia Feng
Published: March 2012

The characteristics of Mathematical model for the temperature’s control of resistance-heated furnace are non-linear, strong inertia, time-variant and pure delay. Adaptive genetic algorithm(AGA) was designed by the principle of the traditional PID control system, and dynamically Simulated an industrial furnace control system. Simulation and actual operation results show that using the optimization algorithm has properties of no overshoot, quick response, good robust and the algorithm is simple. It is proved that this control algorithm is a more effective one on improving the temperature’s control of the resistance-heated furnace.
Time Domain Electromagnetic Differential Equation Methods
Authors: Xu Yong Sheng , Kong Li
Published: March 2012

As the time domain electromagnetic differential equation methods, FDTD, FIT, TDFEM have some relations in the mesh generations, discrete equations and hodge operator.
The Situation and Developing Prospects of Embedded Systems
Authors: Deng Hong Yan , Cai Wen
Published: March 2012

With the development of information technology, embedded systems have become a very hot topic in IT industry. The paper introduces the definition of embedded system, and discusses the structure and characteristics of embedded system. From the current embedded involves the application field, expounds the present situation of the development of embedded, anticipates the vast developing prospects of embedded System industrial in our country.
DSP-Based Intelligent Split-Phase Self-Adaption Reactive Power Compensation Controller
Authors: Lu Mei Lei , Wang Hai Lun , Shen Jian Wei
Published: March 2012

DSP-based intelligent split-phase self-adaption reactive power compensation controller was designed to real-time monitor the dynamic reactive power compensation of power grid parameters. The controller uses the capture unit and A/D conversion unit of DSP chip to respectively complete the power grid frequency measurement and power grid signal sampling, which simplifies the hardware architecture of the system, adopts split-phase dynamic reactive power compensation technology, and guarantees the realization of reactive power compensation via compensation capacitor switching when the three-phase load is unbalanced. The operation results showed that this controller could real-time monitor the parameters of power grid, accurately and rapidly switch the capacitor set with no impact according to the operation status of power grid, making the power factor of load stay within the reasonable range, improving the supply power quality.
One Electric Motor System for Steering Hydraulic Pump and Braking Air Pump in HEV BuS
Authors: Wang Ren Guang , Shi Guang Kui , Chen Hong Tao , Zhang Lin Tao , Yu Chao
Published: March 2012

The pure electric vehicles and hybrid electric vehicles are being developed and used wildly to save energy and reduce air pollution. In pure electric vehicles and hybrid electric vehicles, most of the steering hydraulic pump and braking sir pump have one electric motor to drive its pump. A new system with one electric motor for these two bumps was developed for application in pure electric vehicles（EVs） and hybrid electric vehicle ( HEVs). Comparison with conventional configuration, this new method can reduce cost and mounting space with compact size and higher energy efficiency. And the test results show that the new system can meet the requirements of HEV operation quite well.
Modeling and Simulation Analysis of Motorized Spindle Vector Control
Authors: Zhang Li Xiu , Liu Xiao Hui
Published: March 2012

In this paper, a vector control model based on MRAS with speed sensorless is established and observed the influence of parameters on the output waveform of speed and torque by changing the parameters of and in PI regulator of speed calculating module. Experimental results show that the precision of speed recognition is affected by the parameters and . It is verified that the optimal value of and in the model is when is 4400 and is 1.98.
Mechanism Parameters Optimization of Jumping Robot Based on Dynamic Directional Manipulability
Authors: Yang Qi , Hu Sheng Hai , Yao Jian Jun
Published: March 2012

The concept of dynamic directional manipulability is taken as an evaluating index of jumping performance to quest for improvement of the jumping performance of the jumping robot in view of the mechanism design. On the basis of the jumping robot mechanism model, the dynamics equation in takeoff phase is established, and the mapping relation from the joint driving torque to the acceleration of the center of mass movement is obtained. In order to optimize the jumping performance of the robot, optimal algorithm combining with the dynamic directional measure is used to optimize the mechanism parameters of the jumping robot. The optimal result demonstrates that the research on mechanism parameters optimization of jumping robot is feasible by using the theory of the dynamic directional manipulability measure
Preparation and Thermal Transfer of Phase Change Microcapsule on the Fabric
Authors: Lou Ying Hong , Liu Xiao Yan , Liu Xiao Mei , Cao Lei , He Lan Xi , Yu Wei Dong
Published: March 2012

In this paper, the microcapsule of PCM (phase change material) was prepared, and the temperature adjustment principle of PCM was introduced. From the SEM, the morphology of microcapsule was shown as circle and uniform, which accorded with the particle distribution. The DSC curve showed the PCM heat change process. In this paper, the thermal transfer of microcapsule on the fabric was also introduced which was very useful for smart fabric application.
Hydrogen and Electric Field Effect on Iron Impurities Removal from Molten Zirconium
Authors: Pastukhov E.A. , Vostrjakov A.A. , Sidorov N.I. , Chentsov V.P.
Published: March 2012

Hydrogen and iron diffusion coefficients in molten zirconium have been calculated using a molecular dynamics (МD) model. The molecular dynamics method using micro-canonical (NVT) ensemble was used to analyze iron and zirconium diffusion coefficient dependence on electric field intensity and the presence of hydrogen in the zirconium melt. Results obtained are compared to the literature data on impurity removal in plasma-arc zirconium melting in the presence of hydrogen as well as in electron-beam and vacuum-arc melting. The limiting stage of iron removal from the melt is established. The contribution of the electric field to iron removal is estimated. We carried out systematization of the DHMedata for Zr, Nb, and Ta. An Arrhenius equation analysis for DHMeand its extrapolation to the premelting zone taking into account the Gorsky effect was carried out too. The analysis enabled the estimation of DHMefor the temperature interval where experiment encounters difficulties.
Confocal Microscope Studies of Living Cells Deposited Using Alternating Current Electrophoretic Deposition (AC-EPD)
Authors: Neirinck Bram , Van Mellaert Lieve , Van der Biest Omer , Anné Jozef , Vleugels Jef
Published: March 2012

The recent development of the alternating current electrophoretic deposition (AC-EPD) technique has rendered it possible to deposit material from aqueous suspensions while preventing the electrochemical reactions associated with the application of high voltages on such systems. This does not only allow for more economical and ecological processes but also opens up electrophoretic deposition as a processing technique to a whole range of materials sensitive to either electrochemical reactions or non-aqueous solvents. Living cells can be considered as one class of such materials. In this paper the deposition of two types of bacteria, the Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli, and one type of yeast cells, Saccharomyces cerevisiae, is demonstrated.
Examples of EPD Process Applications in the Electronic Industry and their Characteristics
Authors: van Leth N. J. M. , Verhoeckx G.J.
Published: March 2012

Examples of electrophoretic deposition applications taken from the electronics industry illustrate the versatility of EPD. Determined by substrate dimensions and layer requirements, each application often requires its own unique system configuration. In the following examples EPD will be shown to have distinctive advantages over other layer application technologies like spray-, dip-or spin coating in for example layer conformity.