bluuebunny/crossref_metadata_2025 huggingface dataset:
Structure-Property Relationship of Dodecylbenzenesulfonic Acid Doped Polyaniline
Authors: Liu Ying , Wen Qi , Guan Jia Li , Zhao Shi Jie , Hu Qi Xing , Hou Zhi Feng , Yu Qiao Zhen
Published: July 2013

Dodecylbenzenesulfonic acid (DBSA) doped polypanilines (PANIs) were chemically synthesized in different molar ratios of aniline (An) to ammonium persulfate (APS) and An to DBSA. The microstructures of these PANIs were investigated by means of scanning electron microscope (SEM), X-ray diffraction (XRD), and Fourier Transform Infrared (FTIR). UV-Vis spectrometer, semiconductor parameter analyzer, ubbelohde viscometer and electrospinning technique were used to characterize the optical, electrical properties, viscosity and solubility of these PANIs. The results show that the molar rations of An to APS and An to DBSA had strong effect on the microstructure, molecular weight, degree of crystallinity, optical property, solubility and conductivity of obtained DBSA doped PANI. With the increase of the molar ratios of An to APS and An to DBSA, the conductivities and molecular weight of DBSA doped PANIs decreased, while the degree of crystallinity and solubility of DBSA doped PANIs increased. The DBSA doped PANI could dissolve in dichloromethane or HFIP and could be fabricated short fibers by electrospinning. Moreover, the solution of DBSA doped PANIs in concentrated sulphuric acid showed liquid crystal property.
Saponification of Adsorbent BLPAMA
Authors: Yao Qing Xin , Xie Jian Jun , Liu Jun Xia
Published: July 2013

The saponification conditions for bentonite/sodium lignosulfonate graft acrylamide and maleic anhydride adsorbent composites (BLPAMA) prepared by solution polymerization were studied in detail. The results had shown that the optimum conditions of saponification were that the concentration of NaOH (CNaOH) = 1.0mol/L, the temperature (T) = 90°C and the saponification time (t) = 1.5h. And the maximum adsorption quantity of saponified BLPAMA to Pb2+ was 1.304mmol/g in the Pb2+/Cu2+ binary metal solution.
Performance of Nanomodified Asphalt Binder and Mixture
Authors: Tang Bang Yan , Yao Hui , Feng Yu , Hu Xu Dong
Published: July 2013

The nanopowdered VP108 was selected and applied into the base asphalt binder and mixture. The Marshall binder and mixture tests were conducted to evaluate the mechanical and pavement performance of base and VP108 modified asphalt binders and mixtures. The test results present that the penetration, softening point, penetration index and ductility of VP108 modified asphalt binder improved compared to the base asphalt binder. The mixture test results display that the compression strength, water susceptibility, resilient modulus and cleavage strength of VP108 modified asphalt mixture enhance compared to the base asphalt mixture. Therefore, the overall performance of VP108 modified asphalt binder and mixture improves compared to the base asphalt binder and mixture, such as the high temperature performance, resilient modulus and water resistance property.
The Microwave-Assisted Synthesis and Gas Sensing Properties for Ethanol of SnO2 Nanomaterials
Authors: Liu Yong Ju , Jiang Qiu Ping , Li Yue Huan , Zhao He Yun
Published: July 2013

With the advantages of the microwave-assisted method, good crystalline quality SnO2nanomaterials were successfully synthesized. The morphology and microstructure of SnO2were characterized by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy and high-resolution (HRTEM) used to examine SnO2nanomaterials. Indirect-heating sensors based on nanorods were fabricated and investigated for the gas sensing properties to ethanol. The investigation demonstrates that the sensor based on prepared SnO2nanomaterials has good sensitivity, low detection limit and short response and reversion time to ethanol at 275 °C.
Influences of Firing Process System on Foam Glass Properties
Authors: Wang Qing , Wang Ning , Ding Zhao Yang , Wu Tao Jun
Published: July 2013

Waste glass and polishing waste residue as raw materials were used to make foamed glass. The preparation of firing technology was optimized and the powder burning method was used, by which the foam glass possess good performance, such as light weight, high strength, low thermal conductivity. Results show that sintering temperature and foaming temperature influence the specific strength of foam glass greatly, and the optimal preparation process of foam glass was confirmed: sintering temperature is 1050°C, foaming temperature is 870°C minutes, foaming time is 35min.
Microstructure Evolution of a Single Crystal Superalloy after Tensile Fracture at Different Temperature
Authors: Shi Zhen Xue , Liu Shi Zhong , Yu J. , Han M. , Li J.R.
Published: July 2013

The tensile property tests of DD6 single crystal superalloy were performed at 25°C, 760°C and 980°C in air. Detailed microstructure evolution was carried out on the alloy to illuminate the γ phase and dislocation structure after tensile fracture by scanning electron microscope and transmission electron microscopy. The results show that the alloy has the maximum tensile strength and the minimum plasticity at 760°C. DD6 alloy has the same anomalous yield strength behavior with other single crystal superalloys. The γ phase hasve a little extension in the stress orientation after tensile fracture at 25°C. The γ phase morphology still maintains cubic after tensile fracture at 760°C. The γ phase is no longer cubic and changes into rectangular solid in the specimen tensile ruptured at 980°C. The vertical γ matrix becomes thinner and horizontal γ matrix becomes thicker slightly. The γ phase is no longer cubic and changes into rectangular solid. High density dislocations are present in the matrix channels and a lot of superlattice stacking faults are seen within γ phases in the sample tested at 25°C. A large quantities of superlattice stacking faults within γ phase and a lot of dislocations tangling in matrix channel are all present in the sample tested at 760°C. The dislocation networks have homogeneously formed at γ/γ interface in the sample tested at 980°C.
The Effect of the Distance between the Permanent Magnets on the Levitation Force in Hybrid Magnetic Levitation System
Authors: Ma Jun
Published: July 2013

t has been investigated that the interaction force in hybrid magnetic levitation systems with two GdBCO bulk superconductors and two permanent magnets system and a cubic permanent magnet (PM2) and a cubic permanent magnet (PM3) system in their coaxial configuration at liquid nitrogen temperature. The two single-domain GdBCO samples are of φ20mm and 10mm in thickness, the permanent magnet PM1 is of rectangular parallelepiped shape, the permanent magnets PM2 and PM3 are of cubic shape; the system placed on the middle of system and their coaxial configuration; It is found that the maximum levitation force decreases from 40.6N to 17.8N while the distance (Dpp) between the permanent magnets is increased from 0mm to 24mm and the distance (Dsp) between the two GdBCO bulk superconductors and a cubic permanent magnet PM3 is 0mm, The results indicate that the higher levitation force can be obtained by introducing PM-PM levitation system based on scientific and reasonable design of the hybrid magnetic levitation system, which is helpful for designing and constructing superconducting magnetic levitation systems.
A High Effective and Low-Cost Modifier for Hypereutectic Al-Si Alloys
Authors: Qi Guang Hui
Published: July 2013

In order to settle environment pollution and provide a high effective and low-cost modifier for refining the primary Si in hypereutectic Al-Si alloys, Al-Fe-P master alloys containing 2.0~5.0% phosphorus have been invented by casting method. The Al-Fe-P master alloys can be conveniently produced and an excellent modification can be obtained by adding 0.3~0.8wt% Al-Fe-P master alloy in Al-Si alloys containing 12%-25% Si at a relatively lower modifying temperature. The number of primary Si increases obviously and the average grain size of primary Si decreases largely, less than 50μm. Furthermore Al-Fe-P master alloys have many advantages, such as low cost, convenient operation technology, no pollution, stable and long-term modification effect, easy storage and etc. Al-Fe-P master alloys have overcome the shortages of current modifier and have a good future for hypereutectic Al-Si alloy modification.
Growth and Characterisation of Ag2S Films on ZnS/Indium-Tin-Oxide Coated Glass
Authors: Pan Hong Cheng , Li Xue Peng , Liu Wei Hong , Ren Yan Bin
Published: July 2013

ZnS thin films were deposited on indium–tin-oxide (ITO) coated glass substrates by a chemical bath deposition method. Then the ZnS/ITO slides were immersed in the solution containing 6 mM phosphate buffer solution (pH 7.4), sodium polyacrylate (0.01% w/w), and 0.24 mM AgNO3 at 37°C for 3 h to growth Ag2S films on the surface of ZnS/ITO slides. The absorption band of Ag2S/ZnS/ITO slide displays a considerably blue-shifted. The X-ray diffraction analysis demonstrated the presence of acanthite Ag2S on the surface of ZnS/ITO slides, which is consistent with the cyclic voltammetic data.
Analog Circuits Fault Diagnosis Using Multifractal Analysis
Authors: Sun Yong Kui , Yu Zhi Bin
Published: July 2013

Analog circuits fault diagnosis using multifractal analysis is presented in this paper. The faulty response of circuit under test is analyzed by multifratal formalism, and the fault feature consists of multifractal spectrum parameters. Support vector machine is used to identify the faults. Experimental results prove the proposed method is effective and the diagnosis accuracy reaches 98%.
A General Method for the Modeling of Bearing Systems
Authors: Guo Tie Neng , Cui Ya Hui , Cai Li Gang
Published: July 2013

Based on force analysis of angular contact ball bearings, this paper proposes a generic mathematical modeling method. This paper conducts in-depth research for these aspects: all directions of the stiffness characteristics under different load conditions of angular contact ball bearings, internal contact deformation and the change of bearing parameters. This article eventually gets the variation of the bearing characteristics under different load conditions.
Simulation Analysis of Walking and Climbing Robot Based on ADAMS
Authors: Liu Dong Mei , Yang Hang Xu
Published: July 2013

At present, it is mostly the wheel or caterpillar of large mechanical equipment to finish the transportation operation in the mountainous area and forest complex environment. These large machines have some shortcomings, such as power consumption, poor mobility, low working efficiency and their own shortcoming of balance and the barrier and grade ability. In order to solve the above problems, this paper designed a new type of walking climbing robot and built virtual prototype of the robot by using PRO/E, did simulation of the robot motion process and the simulation results verified the feasibility of the design.
Research on Piezoelectric Tube Stack for Radial Vibration Mode
Authors: Zhong Chao , Wang Li Kun , Qin Lei , Zhou Jing Jing , Chen Cui Ying , Liu Jing Jing
Published: July 2013

According to electro-mechanical equivalent principle, piezoelectric tube stack electro-mechanical equivalent circuit is derived by the admittance of single piezoelectric thin tube. The resonance frequency of piezoelectric tube stack for radial vibration mode is also calculated. The relationship between resonance frequencies and average radius, thickness and height with radial vibration mode are obtained through analytical calculation. And radial vibration mode is simulated by FEM .Analytical calculation and FEM simulation results are compared. They coincide well with each other.
Influence of Pressure to Laser-Induced Breakdown Spectroscopy and Importance of Steady Ambient Atmosphere in Quantitative Analysis
Authors: Xi Jun Hua , Hu Xuan Sheng , Zhang Jun , Li Hong Xia , Ji Zhen Guo
Published: July 2013

LIBS of aluminum under the ambient pressure from 1 atm to 10 Pa were implemented. Results showed that the temperature of plasma increased with the decreased pressure and leaded to the raise of density of Al II, decrease of density of Al I. Furthermore, in order to understand the influence of air flow to quantification of LIBS an alloy of aluminum and silicon was measured by LIBS under different level wind. Results showed the ratio of Si I/Al I which is important in quantitative analysis changed with wind despite the pressure change a little. Therefore, the ambient atmosphere must be steady enough in order to improve the accuracy in quantitative analysis of LIBS.
New Method to Identify CT Saturation Based on EMD
Authors: Xia Wen Hua , Gong Mao Fa , Li Guo Liang , Zhang Jian Yu , Cheng Xin
Published: July 2013

Aiming at the problem that Current Transformer (CT) affects differential protection, this paper proposes a new method to identify CT saturation based on Empirical Mode Decomposition (EMD). Differential current can be decomposed into few Intrinsic Mode Functions (IMFs) by EMD. When CT is linear transfer, the current waveform is nearly a sine wave, and it only contains one dominant IMF. However, CT saturation leads to the distortion of secondary current which contains at least two dominant IMFs. From the defined projection area on t-axis of each IMF and the specific gravity coefficient, the number of dominant IMF can be got. Thus CT saturation can be identified. Theoretical analysis and simulation results show that this method can identify CT saturation of different degree. It is convenient to achieve and hardly to be affect by aperiodic component.
Studying of Fuzzy Control for Fuel Injection System of Electronic Unit Integrated Pump
Authors: Chai Bao Ming , Hua Long , Xu Zhi Qiang
Published: July 2013

Through the simulation analysis for the dynamic characteristics of supply pump cam of electronic unit integrated pump system (IEUP); using fuzzy control strategy, to design fuzzy controller, to realize integrated control of the multi-body model and the fuzzy control strategy, to analyze the working parameters of affecting dynamic characteristics of solenoid valve in Matlab/Simulink environment; using the aid of simulation software Hydsim, to establish the model of fuel injection system of electronic unit integrated pump and to analyze it; through the comprehensive analysis of the fuel injection system to get the parameters and conclusions, for the design and optimization of fuel injection system of electronic unit integrated pump and the improvement of fuel injection system of traditional diesel engine to provide theoretical support.
Suppress of Substrate-Assisted Depletion Effects in Super Junction LDMOS on Thin Film SOI
Authors: Xia Chao , Cheng Xin Hong , Wang Zhong Jian , He Da Wei , Cao Duo , Jia Ting Ting , Yu Yue Hui , Shen Da Shen
Published: July 2013

Conventional super-junction lateral double diffused MOSFET (SJ-LDMOS) fabricated on Silicon on Insulator (SOI) substrate suffers from low breakdown voltage under the same on-resistance due to substrate-assisted depletion effect. To suppress this effect, it is important to find the charge density in the inversion layer under buried oxide. In this paper, we propose a charge density equation and its formulation. The results were used in a 3D device simulator to optimize the device structure. The experimental results confirm that the equation is useful to optimize device performance. The breakdown voltage of structure increased 54% and on-state-resistance decreased 58% compared to conventional SJ device. The device fabrication procedure is fully compatible with mainstream SOI CMOS process.
Research and Experiment on the Thermal Characteristics of Hybrid Ceramic Bearings
Authors: Huang Wu Yang , Lin Bin , Dong Xiao Fei
Published: July 2013

The high-speed hybrid ceramic bearing system is simulated by FLUENT, and its temperature rise characteristics under different situations are tested. Meanwhile, an experiment is performed to verify the results. It also shows that simulation with FLUENT is a very useful and low cost method in finishing some complex experiments for substitute.
Analysis of the Ship Loader's Vibration Mode in the Roll-On Process and the Reinforcement Scheme
Authors: Zhang Wen Biao , Wan Shu Min , Lin Bin , Zhu Meng Lai
Published: July 2013

The roll-on process of the ship loader is studied with the finite element method in this paper. The principle and the scheme of the parametric modeling for the ship loader have been discussed. The vibration frequency and the vibration mode of the ship loader in the roll-on process have been researched, and the weaknesses in the structure of the ship loader have been founded. Based on the above discussion, the reinforcement scheme of the ship loader has been put forward, and the vibration mode and frequency of the strengthened ship loader in the roll-on process have been analyzed. With the comparison of the original one, the anti-vibration performance of the strengthened ship loader has been improved, the reinforcement scheme has been proved to be a worthy one in the roll-on process.
Analysis on Curve Negotiation Ability of the Rail Vehicle Based on SIMPACK
Authors: Wang Li Hua , Huang An Ning , Liu Guang Wei
Published: July 2013

The curve negotiation ability and lateral stability are the important and contradictory indicators when evaluating the dynamic performance of the rail vehicle. And in order to study the stability of the rail vehicle, its curve negotiation ability will be studied firstly. In this paper, the whole multi-body dynamic model of the rail vehicle was proposed based on the theory of multi-body dynamics in the software of Simpack. And the lateral force, derailment and overturning coefficient of the rail vehicle when it passed through a specific curve track with specific speed. Then the curve negotiation ability of the rail vehicle was estimated accurately.
Torsional Vibration Analysis of Drive System for 6-High Cold Rolling Mill
Authors: Hou Yu , Zhang Zhi Jing , Guo Yan Xia , Feng Jiu Qiang , Luo Jie
Published: July 2013

The torsional vibration model of main drive system for 6-high cold rolling mill was established. Calculation formula of torque amplification factor (TAF) of main drive system was put forward when the clearance exists or not. The TAF-curve, changing by the biting time of blank, was drawn, and whether torsional vibration could cause mechanical failure in weak link of main drive system was judged. The TAF variation with the biting time of blank was analyzed when the clearance exists. The method to reduce TAF was proposed before the clearance was eliminated, and the effect caused by the impact on main drive system was alleviated.
Study for the Measurement of Cantilever Beam Deflection by Using Digital Projection Speckle Correlation Method (DPSCM)
Authors: Pan Xiao Ou , Han Jie , Wang Qiang , Fu Ji Song , Liu Jian Nan
Published: July 2013

Digital Projection Speckle Correlation Method is a new technique of 3D morphology measurements based on Digital Speckle Correlation Method.In this paper,cantilever beam deflection concentrated load is measured well by DPSCM,which reflects effectiveness of the method.
Impact of In Situ NH3 Plasma Treatments on the Interface between HfLaOx Thin Film and InP Substrate
Authors: Jia Ting Ting , Cheng Xin Hong , Cao Duo , Xu Da Wei , Wang Zhong Jian , Xia Chao , Zheng Li , Yu Yue Hui
Published: July 2013

In situ NH3 plasma nitridation was utilized to passivate InP surface, HfLaOx film was grown by plasma enhanced atom layer deposition method, and the HfLaOx film remain amorphous after 500°C annealing. High-resolution transmission electron microscopy (HRTEM) images showed that in situ NH3 plasma nitridation process make the boundary between InP and HfLaOx smooth and sharp, and could suppress the formation of the interfacial layer. X-ray photoelectron spectra (XPS) results indicated In-N and P-N bonds were formed on the nitride InP surface. The electrical measurements indicated in situ NH3 plasma nitridation process reduced the hysteresis improved capacitance density and to 7 mV, a sharp transition from depletion to accumulation was observed, the interfacial density states (Dit) of the sample with nitridation was 1.67×1012 cm2 eV1, and the equivalent oxide thickness (EOT) was 0.6 nm. The leakage current was 1.5 mA/cm2 at Vg-Vfb=1V.
Seismic Performance Analysis of Oil Pipeline with Crack Defects
Authors: Wang Li Li , Zhang Xiao Qing , Xu Liang Liang
Published: July 2013

The pipelines distribute extensively in China, but pipelines cracks caused pipeline damaged frequently. Once the pipeline’s cracks are considered in the seismic condition, the performance of pipelines will face many problems. The finite element method was used to analyze the seismic responses of pipeline’s cracks. According to fracture mechanics [1], the time-history responses of displacement, acceleration and stress of pipeline with crack defects and seamless pipeline were obtained, and the results were also compared and analyzed. The results indicate that cracks will cause the stress concentration of the pipeline, the pipeline cracks should be considered in seismic responses of pipelines to make the pipelines in safety and economy, and more attention should be paid to the design and study of pipelines with crack defects.
Propagation Characteristics of Coupled Wave through Micropolar Fluid Interlayer in Micropolar Elastic Solid
Authors: Dang Song Yang , Xu Hong Yu , Sun Qing Yong , Liang Bin
Published: July 2013

Based on micropolar fluid theory and micropolar solid elasticity theory, reflection and transmission characteristics of longitudinal displacement wave and two coupled waves were studied when incident coupled wave propagated through micropolar fluid interlayer in micropolar elastic solid. Using numerical example, the rules of the reflection waves and refraction waves amplitudes varied with incident angle are also discussed. Results show that there exist extremum values of reflection and transmission coefficient for coupled wave. There are two peaks and one zero value of transmission coefficient for longitudinal displacement wave.
The Characteristics of Orthogonal Wavelet Frames and Canonical Frames and Applications in Material Science
Authors: Xu Yong Fan
Published: July 2013

Wavelet analysis has become a popular subject in scientific research during the past twenty years. We show that there exist wavelet frame generated by two functions which have good dual wavelet frames, but for which the canonical dual wavelet frame does not consist of wavelets, according to scaling functions. That is to say, the canonical dual wavelet frame cannot be generated by the translations and dilations of a single function. Traits of tight wavelet frames are presented.
Investigation on Hot Deformation Behavior of 430 Ferritic Stainless Steel
Authors: Zhang Jian Bin , Yu Dong Mei , Niu Shao Rui , Ji Gen Shun
Published: July 2013

The hot deformation behavior and microstructure evolution of 430 ferritic stainless steel (430 FSS) were investigated within the temperature range of 950°C~1150°C at the strain rate of 0.01 s-1, 0.1 s-1, and 1.0 s-1using a thermo-mechanical simulator. The effects of temperature and strain rate on the flow behavior and microstructures of 430 ferritic stainless steel at reduction ratio 50 % were analyzed. Results indicated that the apparent stress exponent and the apparent activation energy of the steel were about 1.08 and 344 kJ/mol, respectively. The hot deformation equation of 430 was considered as. There was a relationship between the softening mechanism and Zener-Hollomon parameter (abbreviated Z). With the Z value increasing from 4.30×1010to 5.00×1014, the hot deformation peak stress correspondingly increased from 10.74 MPa to 76.02MPa.
Preparation and Characterization of Dimer Fatty Acids-Based Vinyl Ester Resin Monomer
Authors: Li Shou Hai , Yang Xue Juan , Huang Kun , Li Mei , Xia Jian Ling
Published: July 2013

Novel dimer fatty acids-based vinyl ester resin monomer was prepared via simple ring-opening and esterification reaction with the aid of dimer fatty acids (DA) and glycidyl methacrylate (GMA) as raw material. The effects of different catalyst system, reacting time and reacting temperature on the yield, color, and viscosity of the final product were analyzed. The results of optimal experiments showed that BTEAC catalyst could make the final product with moderate viscosity and lighter color, the optimal BTEAC catalyst addition amount was 0.5wt.%, the optimal reacting temperature and reacting time was 115 °C and 2h, respectively. FTIR and 13C-NMR demonstrated that the target product had been successfully synthesized.
Effect of Indium Addition on the Electrochemical Behavior of Zinc Electrodes in Concentrated Alkaline Solutions
Authors: Liang Hong Xia , Wang Zhi Lin
Published: July 2013

The electrochemical behavior of zinc electrode with indium addition in 35%KOH(or saturated with ZnO) solutions has been investigated systematically by electrochemical methods including linear polarization, potentiostatic polarization, potentiodynamic anodic polarization, potential-time measurements at a constant current density, combining the observations of scanning electron microscopy (SEM). It is indicated that the indium addition makes the corrosion potential of Zn shifted positively and its corrosion current increased. Galvanostatic results showed that the addition of indium shortened the passivation time, indicating indium is an active element to the electrochemical performance of zinc alloy electrode. The potentiostatic polarization curves of the pure zinc plate and zinc-indium alloy electrodes in a 35%KOH solution saturated with ZnO indicated that the addition of indium improved the cathodic polarization of alloy electrodes and the deposition overpotential,mean while it depressed the deposition morphology of zinc on the electrode and accelerated the dendrite growth. Scanning electron microscopy images showed that the addition of indium aggravated the corrosion of zinc electrode which may be responsible for the increased tendency to passivation at high current densities. It has been found that at low current densities the reaction kinetics may be increased by indium addition , which is agreement with the discharging test of actual alkaline batteries.
Power Flow Calculation in Distribution System Considering Different Load Model
Authors: Shu Tian , Li Wang
Published: July 2013

In traditional power flow calculation used constant power load model, it was completely unreasonable to assume that all load nodes in power system can be classified as PQ nodes.In that the result of constant power load model does not accurately reflect the distribution characteristics of network power flow. To put forward power flow calculation considering load models ,such as constant power load ,constant current load and constant resistance load, derives error equations of the node power, calculates element of Jacobian matrix. So, by using MATLAB simulation software ,the program for power flow are presented, which based on the method of different load models, taking 21-node system for example and makes comparative calculations. The research shows that power flow calculation considering different load models can get more reasonable solution.
Research and Simulation Analysis on Fault of Marine Integrated Electric Propulsion System
Authors: Cheng Peng , Qin Peng , Li Ji Hui
Published: July 2013

In this paper, neutral grounding mode, short-circuit failure and loss of excitation of marine integrated electric propulsion system are analyzed and summarized. Marine integrated electric propulsion system module is built in PSCAD/EMTDC. Diesel generator and its excitation module, permanent magnet synchronous propulsion motor and load module,inverter module is included in the system, Short-circuit failure and loss of excitation was added to the simulation system. The changing process of ship electric propulsion system failure is obtained.
Measurement and Analysis of the Power Frequency Electric Field under 500kV Transmission Lines
Authors: Sun Yan Zhou , Song Xiao Yan , Wang Chen Hui
Published: July 2013

The power frequency electric field of the extra high voltage network, as an index which has an important effect on the ecological environment around has been valued by the power design and operate department. Studying the factors that affect electromagnetic environment of transmission line and protective measures can provide technical basis for the design of the transmission line, and make people to recognize the electromagnetic environment of transmission lines correctly and select the rational protection measures. In this paper, firstly the physical model of overhead transmission lines was built and the electric field was calculated, then the actual electric field under 500 kV transmission line in Jiaozuo was measured using the electromagnetic analyzer PMM8053B, finally the correctness of the theory and model was verified using the MATLAB simulation software.
Study on Electrical Power EPON System
Authors: Xiong Xiao Fang , Wu Guo Liang , Wang Bo Tao , Wang Kai Rui
Published: July 2013

In IEEE8023ah Protocols, the uplink bandwidth allocation algorithm is not clearly defined, which depends on the telecommunication device providers. Combined with the strong and multiples services requirements of smart distribution grid, the State Grid developed an OLT chip with QoS mechanism and responded EPON system. Compared with nowadays OLT chip in market, the highlight of our OLT chip is its multiple QoS mechanism. On the respect of dynamic bandwidth allocation, the priority allocate and bandwidth statistic multiplexing functions have been added..
Modeling of Rotary Traveling Wave Ultrasonic Motor
Authors: Zhao Ying Ying , Cai Min , Tang Yuan Xing , Tang Zhen Dong , Li Wen Shi
Published: July 2013

Comparedwith traditional electromagnetic motor, the ultrasonic motor (USM) exhibits unique performance advantages. To speed up the research and development of thedriving ASIC for a rotary travelingwave type ultrasonic motor in diameter of 45mm, it is necessaryto obtain its motor model. The modeling of USM which is composed of two parameters (resistance andcapacitance) is presentedand explained. Both the modeling and simulation are based on our real tested motor-drivercharacteristic data by PSIM software. The testeddata can be reproducedby adjusting the unknown two parameters in our model. Some preliminary simulation resultsindicate that this method used to define two parameters of 45mm motormodel is practicable. This work may establish basic foundation for nonlinear modeling of USM.
Calculation of External Resistance of Two Gates' Circuits Connected with Different Loads
Authors: Shan Yu Qiong , Shan Chang Ji , Luo Jun , Li Xiao Pan , Zhou Li
Published: July 2013

The TTL nand gate cannot be directly connected with the output port of two gates to set a relationship with their output information while the integrated open-collector nand gate can do so by making a proper choice of between the integrated open-collector lines and the resistances.This paper aims to analyze the calculation of, Rp, the externally connected resistance of integrated gate circuit which is made up of open-collector gate, and open-drain gate when the and-not gate, and nor gate of the Loaded gates are discussed respectively.
Study of Analysis Method on Electromagnetic Disturbance for Moving Targets
Authors: Li Bing , Liu Fan Ming , Zhang Lan Yong
Published: July 2013

Nowadays the electromagnetic disturbance analysis bases on the assumption that the target is static and has no Interaction with the Rough background. But the fact is that the target is moving and has interaction with the rough background. This paper gives a method about how to study the complicated moving target modeling technology in the condition of random disturbance and the uncertain effect. The innovative point of this paper is that solve the double Doppler Effect come from the inaccuracy of solitary electromagnetic scattering modeling and moving target.
Research on the Expert System in the Transmitter Monitor
Authors: Jia Lu Ying , Zhou Jian , Xie Chen Hui
Published: July 2013

Safe and stable operation of the transmitter determines the quality of the radio broadcast. In order to make the transmitter safe and stable operation in the working process, authors developed a transmitter monitor system. In the monitor system, authors designed the expert system to diagnose fault for the transmitter. The expert system is composed of several modules, through the establishment of knowledge base, the application of fuzzy inference mechanism and the interpreter thus can diagnose transmitter fault information. This system cans timely diagnosis and debugging in practical application, it also provides a good security to improve the transmitter safety and continuous broadcast.
Information Collection System of Electrical Equipment
Authors: Cheng Xiao Rong , Tang Xin Yan
Published: July 2013

Zig Bee is a focus on low-power, low-cost, low-complexity, low-rate short-range wireless network communication technology; it can well solve the high cost and poor real-time of wired data acquisition system. This paper presents a program to build environmental remote monitoring system based on Zig Bee wireless sensor network. The program uses TI's wireless RF transceiver chip CC2530 and the amount of the external circuit to design the hardware circuit of the sensor nodes and the coordinator node, and then design application software for sensor nodes and coordinator nodes on the basis of the Zig Bee protocol stack. The test results prove that the system can effectively monitor long-term stability of the environment of electrical equipment.
CNC Machine Fault Diagnosis Strategy and Maintenance
Authors: Fu Gui Xing
Published: July 2013

This paper introduces the Control logic relationship of CNC lathe, and combines with statistical data to discuss about how to scene forensics and failure analysis. And it uses fault diagnosis skills Maintenance examples to illustrate how to think when face with the failure of the CNC machine tools, which has guiding significance to the implementation of a correct diagnosis and maintenance of CNC machine tools.
Study on Fault Diagnosis of Gear-Box
Authors: Chen Xiao Hui
Published: July 2013

A BP neural network approach based on differential evolution and particle swarm optimization is developed for fault diagnosis of gear-box. The approach takes a novel kind of optimization algorithm, i.e., differential evolution and particle swarm optimization algorithm, to train BP neural work. The feasibility and effectiveness of this new approach is validated and illustrated by the study cases of fault diagnosis on gear-box. The diagnosis results show that the BP neural network based on differential evolution and particle swarm optimization has a better training performance, better convergence behavior, as well as better diagnosis ability than BP neural network. Owing to the flexibility of this approach, it can be adapted to other problems very easily.
Simulation Design of Transformer Differential Protection Based on Mat Lab
Authors: He Hong Hua
Published: July 2013

The microprocessor-relay protection device has gradually replaced regular simulation relay protection it is also difficult to visually determine protection device malfunction or tripping. Therefore, the use of the Mat lab toolbox to build transformer differential protection simulation model, the simulation results show that two-line ratio brake can correctly identify internal fault current, and rapidly remove fault, and the system also can provide convenient for microprocessor transformer protection.
Generating Device Based on Theory of Semiconductor Thermoelectric Generation
Authors: Li Kun , He Han
Published: July 2013

The semiconductor thermoelectric generator is a thermoelectric conversion device and is produced according to See back effect of the semiconductor. As a special energy conversion way, its advantages are obvious, with significant recycling effects of low temperature difference energy. A semiconductor thermoelectric generating device is made in accordance with the above theory. The performance parameters including the output power of the generating device are measured through experiments.
Microfluid Permittivity Measurement Based on On-Chip CPW with Finite Metal Thickness
Authors: Zou Huan , Wang Hai Yang
Published: July 2013

A new method of permittivity measurement based on the on-chip coplanar waveguide (CPW) with finite metal thickness without close box or microfluid channel is presented in this paper. The material under test (MUT) is directly located in the slot line of the CPW which is considered to be the strongest field distribution area. The proposed structure sample is simulated through HFSS. The simulation results agree well especially when the metal thickness is comparable with the slot line width, the errors are less than 5%.
Station Deployment and Signal Filter Design for Performance Evaluation of Indoor Positioning System
Authors: Chen Chih Yung , Hwang Rey Chue
Published: July 2013

This paper investigates enhancement of fuzzy logic indoor positioning system (FLIPS) and its effect upon the wireless station deployment. The proposed scheme adopts an average filter to improve stability in transforming received signal strength (RSS) between a sensor and stations into distance. Based on the reliable distance data set, a fuzzy logic inference engine determines precise coordinates of the sensor. In order to evaluate the optimal deployment of wireless stations, this study experiments on three different size test areas within three to eight stations. Those results provide considered analysis to develope a more efficient FLIPS.
Multi-Channel Stepping Motors Driven Based on SCM
Authors: Huang Cui Cui , Sun Li Hua , Yu Liang Jun
Published: July 2013

Stepper motor is an electromechanical device, which converts electrical pulses into discrete mechanical movements, and it is used in varies kinds of automatic control system widely. This paper introduces a driver control system of multi-channel stepping motors based on SCM, the system can realizes the controlling of at most 16 motors with two groups of SCM I/O, and in the system, the motors can work with different rate and excitation manner through the piece selecting function of 74573.
Harmonic Vibration Control Synchronization Simulation for Double Exciting Motors of Single-Mass Nonlinear System
Authors: Li Xiao Hao , Zhao Wei , Zhao Qun Chao
Published: July 2013

For nonlinear harmonic vibration synchronization vibration machine have been widely used in metallurgy, mining, agriculture and other fields, but the harmonic vibration synchronization mechanism for the multi-excitation sources which used to driven the nonlinear vibration machine to realize the harmonic vibration synchronization movement is not clear. In order to study the problem, the nonlinear electromechanical coupling dynamic model has been established for the single-mass harmonic vibration synchronization nonlinear machine in the paper, and by analyzing the coupling dynamic characteristics of the double exciting motors, the harmonic vibration control synchronous simulation model and corresponding harmonic vibration control synchronization strategy have been established. Under the different initial conditions and different Working conditions, the harmonic vibration control synchronization process for the double exciting motors have been simulated. Based on the simulation results, the harmonic vibration control synchronization mechanism for the double exciting motors which used to drive the nonlinear vibration machine have been analyzed and discussed, and the validity of the harmonic vibration control synchronization strategy for the double exciting motors to realize the harmonic vibration synchronization movement has been verified. All these can provide the reference basis for the subsequent nonlinear vibration machine to carry out the harmonic vibration synchronization status application.Introduction
Modeling and Motion Simulation of Loader Working Device Based on ProE
Authors: Wei Ren Sheng
Published: July 2013

The development situation and prospects of the loader is mainly introduced, and to describe the loader movement simulation design of specific flow. The main parts three-dimensional solid modeling method and model assembly design process for the loader working device are described in detail. At the same time, the parts of mechanical structure for the loader working device carry on motion statics and strength analysis. Through the use of Pro/E in the loader working device to build 3D solid modeling, to realize the movement simulation of the loader working device process, and then to analyze the working device movement component in the course of the campaign that includes motor coordination relationship, motion range design, the possible movement interference check and other problems and outputs the results.
Design and Implementation of CNC Operator Panel Control Functions Based on CPLD
Authors: Zhan Hua Qun , Xu Bin
Published: July 2013

Method of CNC operator panel control functions are introduced in this thesis, which is based on CPLD. First, the paper indicates the theory of system works and the overall structure; second, the thesis mainly introduces the implementation of the keyboard scan, the function of hand wheel and serial communication; Last but not least, the correct simulation results are given as well. The MAX V chip of ALTERA is used in this program, 144 IO ports can be processed at most. It is an effective solution to process lots of IO ports and the problem of hardware space limited.
Architecture Earthquake Disaster Simulation Based on Three-Dimension GIS Algorithm
Authors: Pang Guo Li , Chen Dan Qi , Huang Meng
Published: July 2013

GIS geographic information system algorithm are able to be used in the disaster initialization period, middle and rescue stage for the advanced two-dimensional simulation technology with its geographical model as well as providing us with accurate and quick geographical indicators, with the estimation of building distribution and mountain damaged condition, can bring us extremely high value in use. But the traditional GIS algorithm also has tremendous convenience, namely we can't form accurate analysis of the buildings and streets form three dimensional regions, we cannot tell the difference between topographic change quantities as well, resulting in certain circumstances that the algorithm is no practical. This article puts forward 3d and 2d embedded GIS algorithm according to the satellite remote sensing technology, which can be used to cope with buildings and streets for disaster situation simulation and analysis, through this algorithm we are able to obtain the original data before a disaster, disaster failure scene and the distribution of post-disaster construction. With verification, this algorithm has high practical value and can shorten the fitting time of data.
Research of Image Recognition and Tracking Algorithm Based on PID Fuzzy Control
Authors: Jiang Wu Xue , Wang Zhi Ming , Luo Jian Feng
Published: July 2013

Video surveillance system with image recognition and image tracking capabilities has a wide range of applications in the field of city protection, social security and public safety. In this paper, based on the analysis of image detection and tracking principles, image recognition and tracking algorithm based PID fuzzy control is proposed. First, the image on the basis of the gray-scale image is acquired by the video processor and the linearization processing, and then through the expansion operation of mathematical morphology the candidate region of the image recognition is taken, and then the final image region is obtained through the vertical positioning and horizontal positioning of the region Finally, through the PID control algorithm it is the image of the track. Simulation results show that the PID fuzzy control-based image recognition and tracking algorithm possesses good vehicle license plate image recognition and tracking performance and good practicability.
Research of Navigation Bar Production Based on CSS
Authors: Mi Jun Ying
Published: July 2013

In the production site, making navigation bar is very important. A good navigation bar determines the style of the page and the page level of clarity. This paper introduces a method of making a horizontal navigation bar. And this paper uses the CSS + DIV corresponding effect.
Performance Analysis of Three-Phase Full-Controlled Bridge Rectifier Circuit
Authors: Li Yan
Published: July 2013

This paper is a simulation designed for three-phase fully-controlled bridge rectifier circuit in the power electronics to establish a circuit simulation model under MatlabSimulink, friendly visual interface with MatlabGui design, Matlab simulation model link, so that the three-phase fully controlled bridge rectifier circuit design will be more convenient, intuitive, and accurate.
Research on Double-Closed-Loop Control for the Frequency Converters in Parallel Operation
Authors: Long Hao , Li Xue Jun , Huang Jing Long , He Kuan Fang
Published: July 2013

In order to achieve the two drive synchronous operation , it's necessary to add an inner current loop on the basis of the outer voltage regulator which improve the system s dynamic response speed in the premise of ensure the stability of the system. The frequency converter parallel technology controlled by voltage and current double closed loop is researched. Design the controllers parameters of the current inner ring and voltage outer ring and these parameters are demonstrated according to the classical control theory. At last we conduct the simulation whose results show that the parallel converter system which controlled by the voltage and current double closed loop has good static and dynamic performance.
Design of Embedded Remote Fire Alarm Module
Authors: Xiong Ai Min , Li Fei Yu , Wen Jia Wen
Published: July 2013

In view of the present fire electronic equipment protocol is not unified, this topic is based on the design of the TCP / IP protocol and embedded remote fire alarm module. This module uses the LPC1768 as the core chip to design the hardware circuit including input and output interface. TC35 is a GSM/GPRS wireless dual-band module used as mobile network interface. It uses C language to program. This module realizes remote two-way real-time data communication using of mobile communication module. It makes fire control system more intelligent and provides a simple and effective method to implements a network of city fire management.
Design of Data Transfer in Intelligent Building System
Authors: Jing Yong Hua
Published: July 2013

The energy conservation system of intelligent building in wireless sensor network could dynamically control the devices of building in order to that energy conservation,such as the light,condition air and so on.The reliable transmission of control information is vital for the stable operation of this energy conservation system. The paper introduced a kind of measurement and control terminal methods based on ZigBee network.The design of hardware and software were mainly discussed.The design of hardware , sensor ,USB interface and software in intelligent building control terminal were discussed in details based on the CC2531 chip. Finally the design was used in the intelligent building research.The timely and reliable transmission of the control information can be realized.
Design of Virtual Machine Tool
Authors: Xu Xin Jian
Published: July 2013

this paper overall programme research on virtual design technology of machine tools, not only established a virtual design environment, identify reasonable options in a relatively short period of time, but also providing the basis for quotation, therefore reflecting a favourable measures quickly to market demand.