bluuebunny/crossref_metadata_2025 huggingface dataset:
Car GPS Antenna Electromagnetic Compatibility of the Simulation Study
Authors: Chi Yao Dan , Zhang Sheng Qian , Gu Hai Long , Mu Yu Song
Published: October 2013

With the rapid development of the automotive industry,there will be automotive electrical presence of strong electromagnetic interference problems. he functionality of the car electronics electromagnetic interference problem has become increasingly prominent, car antenna by the degree of interference is particularly serious, people are urgently looking for a car antenna to solve electromagnetic immunity, which Anosft HFSS software GPS antenna modeling and simulation designing The GPS antenna field pattern and 3D simulation of electromagnetic fields effect analysis designed to provide a theoretical basis for the anti-anti-jamming GPS antenna electromagnetic and provides the premise for the future for other electrical equipment, electromagnetic compatibility research.
Research in Test Case Method in Software Testing
Authors: Xiao Hua Bo , Huang Shu Li
Published: October 2013

Based on existing software test case designing method, combining artificial intelligence domain knowledge and methods, we design a method of Predicate Calculus for Test case designing, using this method to provide detailed information to testers.
The Technology of Ultrasound for Measuring the Thickness of the Pipe Lining
Authors: Wang Xin , Li Guo Xiang , Zhou Xuan
Published: October 2013

For the issue of the industrial pipe wall lining the thickness of dynamic changes difficult to be measured, based on the principle of ultrasonic thickness measurement and ultrasonic propagation in solids and based on existing research and theory of ultrasonic, this topic has designed a ultrasonic technology solution for measuring the thickness of the pipe wall lining. This technology achieves online measurement and non-destructive thickness measurement. Through processing and analysis of the experimental results, it demonstrates the feasibility and reliability of the technology. This technology has great significance for improving the security and stability of the pipeline.
Experimental Study of Fuzzy PI Controller of HEV DC/DC Converter
Authors: Zhang Yong Bo , Kang Long Yun
Published: October 2013

This paper aims to improve the control performance of series HEV, and mainly conducts the study of the basic components of the control systems bidirectional DC/DC converter and motor drive circuit--the buck chopper and boost chopper. Also, this paper constructs a hardware platform and designs the fuzzy self-tuning PI controller. Through the comparative experiments of PI control and fuzzy PI control, it has been verified that the fuzzy PI controller has better control effect.
Development and Research of Nanostructured Multi-Layered Composite Coatings for Tool Made of Tungsten-Free Carbides (Cermets)
Authors: Vereschaka A.A. , Hojaev O.Kh. , Vereschaka A.S. , Ruziev I.S.
Published: October 2013

This paper discusses the issues of improving the efficiency of cutting tool made of tungsten-free carbides (cermets) by using nanodispersed multi-layered composite coatings formed by use of innovative processes of filtered cathodic vacuum arc deposition (FCVAD). The paper presents the concept of architecture of nanostructured multi-layered composite coatings, methodology for choice of function and rational component parameters of architecture for tools made of cermets. Developed compositions of nanostructured multi-layered composite coatings contributes to significant improvement of properties of cutting tool made of cermets in cutting constructional steel and expansion of their application area for machining of heat-resistant alloys.
Research of Flatting of Image Data of Human Movement
Authors: Liu Yi , Zhou Ji He , Yang An
Published: October 2013

In order to insure the reliability of the biomechanics image analysis, the original image data should be in mathematical process, in which the noise data can be maximally removed while the real valid information can be reserved. This is the so called data smoothing. In recent years, few scholars conducted deep comparative studies in this area. Therefore, the present study tackles this rare issue, and fills in the gap of deep comparative studies involving different smoothing methods. This paper aims to test and compare these two different methods in their ability to process human movement images. The result is readied by applying theoretical analysis and conducting experiments. The present study relies on various mathematics principles of interpolation and filter methods, the comparison between the merits and demerits, range of applications and effects of different interpolation and filter combinations. The present study then adopts experimental method to validate the hypothesis and reach our conclusion. We obtain the conclusion that it is better to use low-pass filtering to remove the high-frequency noise data, a method which is used by most scholars. However, the data of IIR is closer to the original value and has a better effect, when processing smoothly change data. Henceforth, new process method from other areas can be tentatively introduced to improve the precision of data processing, such as wavelet analysis method, integrated use of multistage filtering analysis and so on.
Investigation of the Influence of Deep Rolling on the Thermal Fatigue Cracking for AISI H13 Steel
Authors: Zhang Liao Liang , Lei Li Ping , Zeng Pan
Published: October 2013

Hot-working tools are frequently exposed to high cyclic temperature and mechanical loads, usually resulting in thermal fatigue cracking, which is observed as a network of fine cracks on the surface. The crack network degrades the performance of the tool and even invalidates it. Deep rolling is a surface strengthening treatment generally applied to improve the fatigue performance of metal components. But few attentions are paid on its influence on thermal fatigue cracking of the components, considering the relaxation of residual stresses and work hardening, which are deemed to mainly account for the improvement of fatigue performance. In this paper experiments were carried out to investigate the influence of deep rolling on thermal fatigue behavior of hot-work tool steel AISI H13. The experiment results show that deep rolling can improve the thermal fatigue behavior of AISI H13. To explore the mechanism of the effect, the changes of the residual stresses, the microhardness of the samples are also presented.
Design and Implementation of Selcal Controller
Authors: Gao Juan , Zhang Yao Yu
Published: October 2013

Selcal (selective calling) controller, as intermediate equipment between selcal and radio station, is designed to achieve the software automation and remote control in aviation. The whole system adopts msp-430 microcontroller as hardware core and C language as the method of software realization. This paper focuses on hardware connection and design to introduce the electrical design and software flow of selcal controller.
Research on the Cooperative Control Method for Trajectory Tracking of Automatic Guided Vehicle Based on Dynamic Position/Force
Authors: Liu Xuan Zuo , Yan Qiao Yun , Tang Fei Yun
Published: October 2013

AbstractConsidering the influence of the dynamic characteristic of automatic guided vehicle (AGV) on trajectory tracking controlling, double closed loop control structure is proposed to realize the position/force cooperative control. The outer loop controlling uses backstepping to design corresponding position controller for kinematics model of AGV, while the inner control uses the integral sliding mode controlling. Self-adaptive controlling law is used to estimate the uncertain external interference in the driving force controller and stability of AGV trajectories tracking proof is proposed. In order to make the system achieve better control performance and prevent the occurrence of severe wobble, the hyperbolic tangent function in the control law of sliding mode control replaces the sign function to ensure a continuously smooth control input and states of the system. In the Matlab/simulink environment, tracking a given splayed trajectory generated by the S function to verify the double closed loop control structure and the effectiveness of the control algorithm proposed in this paper.
The Research of the Straddled Jaeger Salto with a 1/2 Turn of the Olympic Champion Kexin He
Authors: Zhou Ji He , Liu Yi
Published: October 2013

The movement of the Straddled Jaeger Salto with a 1/2 Turn performed by Kexin He, the UB princess, who was the only individual event grand slam winner of the Chinese Women's Gymnastics Team, was videotaped and 3-D analyzed. The kinematic characteristics of this perfectly performed high skilled movement provided useful information for the technical training of coaches and athletes and enriched gymnastic theories. Overall, Kexin He performed the Straddled Jaeger Salto with a 1/2 Turn well. Nevertheless, there was still some room for her to improve, such as she straddle was performed a little bit too early and the after the somersault had been completed, both legs were brought together a little bit later.
Surface Roughness Measurement Analysis
Authors: Zhou Jing Ling , Wu Shu Qian , Wu Guo Qing , Cheng Hao
Published: October 2013

The surface roughness is a physical quantity of micro geometry error surface material used for assessment of processed composed of peak, valley and the spacing of the. Have a great influence on the parts usage. Generally speaking, the surface roughness is small, can improve the matching quality, reduce wear, extending the service life of parts, but the processing cost of parts will increase. Commonly used assessment parameters can be divided into height parameters, spacing and shape parameters (parameter) three series. Measurement methods are commonly used surface texture tester, optical surface profiler and atomic force microscope. This paper makes a comparative analysis on the different measurement methods.
Study on Dynamic Phase Correction Method for Improving the Test Accuracy of the Pneumatic Shape Measuring Roll
Authors: Sun Xu Guang , Wang Chang Hai , Shan Shi Yan , Feng Cheng Long
Published: October 2013

In brief introduction of the pneumatic shape measuring roller's construction and work principle, the static and dynamic state experiments of the roller then found distributing regulation and characteristics of the measuring differential pressure which following circumference direction. Then we put forward dynamic phase correction method to improve the testing accuracy of the roller. It passes by experimentation to prove the possibility of method in this text.
Experimental Study of Lanthanum Boride Ceramic Powder Synthesis Process
Authors: Wang Fu Jun , Zhu Hui Rong , Xiu Qi Di , Luo Jing
Published: October 2013

In this paper, the physical and chemical properties of LaB6 Ceramics are introduced, the influence of fabrication techniques on the microstructure and properties of LaB6 Ceramics are discussed. The combustion synthesis process was considered as the proper method for fabrication of LaB6 Ceramic powder with high purity. The results showed that the control additive has a great influence on the synthesis processand the nanoLaB6 Ceramic powder with high purity can be produced made when the content of the control additive is 30%.
Machine Vision and Applications
Authors: Wang Yong , Guo Hui
Published: October 2013

With the development of modern industry, manual labor has been far from meeting the needs of modern industry. In recent years,with the development of artificial intelligence algorithms and other related field. Machine vision has been applied in a wide field of industry. An overview of key machine vision system, and demonstrates some machine vision applications will be proposed in this paper.
Design of Embedded Controller with Flexible Programming for Industrial Robot
Authors: Wang Zheng Dong , He Kai , Fang Hai Tao , Du Ru Xu
Published: October 2013

This paper presents an embedded controller of low cost and high performance for industrial robot. The ARM microprocessor is chosen as the main controller for the processor. Based on the 7-segment cubic spline interpolation algorithm, a real-time control for the robot is implemented. This proposed trajectory method can perfectly generates speed S-curve shape for a start-stop process of the robot. In this article a programming language, G-code, is developped for the robots motion control by using the editing interface we designed specially on PC platform. With all the features for 2-4 degree of freedom robot application, the editing interface has been developed for editing and compiling G-code, which can be downloaded into the microprocessor with the custom communication protocol through communication interface. The programming method of the G-code language is easy to learn and use for the non-professional users. The paper describes the design and implementation in detail for the controller, which was validated on our designed SCARA robot, and it worked reliably.
Empirical Investigation on the Regional Correlation of Housing Price Fluctuations - Take Shaanxi as an Example
Authors: Guo Bin , Pan Li Hao
Published: October 2013

Compared with the correlation of housing price fluctuations among the major cities, the link on geography and economy is closer between the provincial cities, and the movement of capital and population is more common. These features make the correlation of price fluctuations is more likely to occur. This paper utilizes Granger causality test to investigate the housing price interactions among the cities in Shaanxi province by employing the housing price data from 1999 to 2011.The research shows that the inverted conductive relationship which the surrounding cities promote the central city exists in the housing price of Shaanxi. On this basis, this paper quantifies the degree of the correlation by using the impulse response function method. The conclusion will enlighten the establishment of the intervention and coordination mechanism.
Investigation of the Strain Distribution of T-Peel Flexible Polymers Using Digital Image Correlation
Authors: Yang Ya Bin , Zeng Pan , Lei Li Ping
Published: October 2013

T-peel behavior of welded thermoplastic polyurethane elastomers (TPU) coated fabrics were investigated in this study, in consideration of the inhomogeneity of the strain distribution. The samples were welded by high frequency dielectric heating and then subjected to the T-peel test. The influence of the welding parameters on the welding strength was studied firstly. Then the T-peel process was analyzed using digital image correlation (DIC). The results showed the strain distribution along the direction of loading can be fitted by Gaussian function and the load grew exponentially as the increasing of the strain of the welded zone.
A System Model for Assessment on Creation Capabilities of Construction Service Enterprises in China
Authors: Sun Yan Bin , Fu Han Liang
Published: October 2013

The article converted the old prospective that people used to focus on technology innovation or some other single aspects into observing the revolutionary development of Chinas construction service enterprises systematically. This article made first attempt to constitute a model to evaluate the enterprises creation capability completely.
Simulation and On-Site Performance of a Novel 3D Concentrator for Photovoltaic Application
Authors: Lei Peng , Lai Jun Yuan , Ma Jiong , Jin Peng
Published: October 2013

We presented a family of new 3D concentrators. Simulations showed they could significantly increase the illumination on objective plane compared with 2D trough concentrators. A 3D concentrator prototype with a nominal 35° half acceptance angle was made. Its performance was tested under an indoor solar simulator and by on-site experiment. Under solar simulator, a low cost poly-silicon solar cell coupled with a 3D concentrator achieved a 2.25 times of maximum output power compared with a similar bare solar cell. In the on-site experiment, poly-silicon solar cell with a 3D compound parabolic based reflective concentrator gained an average of 1.4 times maximum output power when the incidence sunlight within the critical angle.
The Excavating Stability Study of a Power Station Underground Plan
Authors: Zou Wei
Published: October 2013

In this study, rock stability psychoanalytic theories were concluded, excavation of the underground workshop were done by applying geotechnical common software FLAC3D, then the adjoining rock displacements and transformation rules were simulated and study, and then bolts were used to support the rock, with the study of stress and strain rules and we can analyze and evaluate the effects of the bolting.
The Finite Element Analysis for Mechanical Properties of Reinforced FRP Pipe Concrete under Axial Compression - Discussing the Impact of Reinforcement Ratio, Concrete Strength
Authors: Li Wen , Yan Hai Nan , Wang Peng , Chen Xiao Gang , Yao Li Na
Published: October 2013

According to the basic idea of the finite element method, using the finite element software ANSYS to establish the finite element model of the reinforcement FRP pipe concrete under axial compression, introducing the unit selection in the process of building model ,based on the principle of meshing boundary conditions and constitutive relations selected; The significant degree of the model verified by compare with the test results. Analyzed by finite element reinforcement ratio, concrete strength and other factors on the mechanical properties of concrete under axial compression reinforcement FRP pipe, the analysis of the results shows: The increase of reinforcement ratio to improve the point load of the specimens and improve the composite column ultimate bearing capacity, but the reinforcement ratio increase will reduce the binding effect of the FRP pipe; The whole component be improved the strength of concrete can improve the ultimate bearing capacity, but it reduces the mechanical properties of the specimens.
Evaluation of Groundwater Quality at an Industrial Park Site Zone Using Statistical Analyses: A Case Study in Taiwan
Authors: Yang Bo Ming , Yang Zong Han , Liu Jong Kang , Lee Hui Yu , Kao Chih Ming
Published: October 2013

Multivariate statistical analysis explains the huge and complicated current situation of the original data efficiently, concisely, and explicitly. It simplifies the original data into representative factors, or bases on the similarity between data to cluster and identify clustering outcome. In this study, the statistical software SPSS 12.0 was used to perform the multivariate statistical analysis to evaluate characteristics of groundwater quality at an industrial park site located in Kaohsiung, Taiwan. Results from the principal component analysis (PCA) and factor analyses (FA) show that seven principal components could be compiled from 20 groundwater quality indicators obtained from groundwater analyses, which included background factor, salt residua factor, hardness factor, ethylene chloride factor, alkalinity factor, organic pollutant factor, and chloroform factor. Among the seven principal components, the major influencing components were salinization factor and acid-base factor. Results show that the seven principal component factors were able to represent 89.6% of the total variability for 20 different groundwater quality indicators. Groundwater monitoring wells were classified into seven groups according to the partition of homogeneity and similarity using the two-phase cluster analysis (CA). The clustering results indicate that chlorides such as 1,1-dichloroethylene, 1,1-dichloroethane, and cis-1,2-dichloroethylene had the highest concentrations among the clusters. This indicates that groundwater at nearby areas may be polluted by chlorinated organic compounds. Results from the correlation analysis by Fisher coefficient formula show that the cluster results of seven groups of groundwater wells had 100 and 80% accuracies using discriminant and cross-validation analyses, respectively. This implies that high accuracy can be obtained when discriminant and cluster analyses are applied for data evaluation.
Design of a New Piezoelectric Vibrating Feeder
Authors: Shen Yan Hu , Su Jiang , Liu Yong , Yang Zhi Gang
Published: October 2013

With two upper and nether piezoelectric vibrators to provide excitation in the same time, vertical double driven piezoelectric feeder (vertical double driven feeder for short in the paper) has smaller piezoelectric ceramics (PZT), and lower driving voltage to prolong the lifetime of the PZT, meanwhile, its carrying capacity gets stronger, compared with vertical single driven piezoelectric feeder (vertical single driven feeder for short in the paper). Vibration analysis was carried out on the feeder system, and the affection factors on the system natural frequency and feeder tray amplitude were received. Based on the modal analysis, the system theoretical resonant frequency was got as 135.95Hz. In the end, the prototype was tested to analyze the relationships among the feeding speed, feeder tray amplitude, driving voltage and driving frequency.
Advanced Technology Research on the System of City Passenger Rail Vehicle Doors
Authors: Guan Shang Jun , Yang Ke , Zhang Jian Long
Published: October 2013

This paper mainly describes and introduces the various types of city passenger rail vehicle doors as well as the advantages and disadvantages of them. It pays more attention to describe and introduce a new type of internationally advanced Sliding Plug Door100% low-floor passenger car doors from ministry of science and technology.
Application of Frequency Conversion Technology in the Constant Pressure Water Supply System
Authors: Zhu Jing Bo , Zhang Yong Hua
Published: October 2013

In order to solve the problem that the management of water-supply operation is still backward and the phenomenon of water resources wasting is exceedingly serious, this paper introduce some advanced technologies such as computer, frequency transformer, programmable logical controller (PLC) and so on into water-supply network, the constant pressure water supply system is devised to achieve the variable-frequency speed control by making use of the electric controlling system composed of S7-200PLC, MM440 frequency transformer, miniature circuit breaker, AC contactor, thermal relay, DC power supply, miniature electro-magnetic relay, sorts of indicator lights and host command devices.
Optimization for Limited Resource Schedule in Public Construction Project
Authors: Li Han Wen , Luo Fu Zhou
Published: October 2013

The optimization of scheduling is an important aspect of the construction project plan, the paper proposes applying improved ant colony optimization to solve the public construction projects scheduling optimization problem under limited resource condition and constructs the mathematical model of the project construction schedule optimization. Further verify the validity of the model and the improved ant colony optimization on the schedule of the optimization problem solving has universal applicability.
Design and Simulation of a High-Isolation Series/Shunt Mixed MEMS Switch
Authors: Deng Zhong Liang , Fan Sen , Wei Hao , Chen Cai Hu , Gong Hua
Published: October 2013

In this paper, a novel high isolation switch was designed and optimized on high-resistance silicon substrate with all-metal beams. The RF MEMS switch was modeled with gold surface micro-fabrication process. To obtain a low actuation voltage and a better isolation, a folded structure in the shunt part of the switch and a short capacitance in the series part were designed, respectively. By combining the series and shunt switches, the mixed structure offered a wide range (DC-40GHz) with excellent isolation better than-35dB and insertion loss less than 0.72dB at the same range, making it promising for applications with wide frequency bands.
Robust Optimization of RFID's Investment in Supply Chain with Inaccurate Inventory
Authors: Lei Quan Sheng , Zhou Ling Yu
Published: October 2013

Traditional supply chain theory often assumes perfect alignment between system inventory and actual inventory. However, inventory information is usually inaccurate due to many reasons in practice. We hereby describe an expended newsvendor model with inventory inaccuracy who wants to remove this negative effect by investing RFID system. By analyzing the best respond to market factors (commodity availability caused by inventory inaccuracy and tag price of RFID), we generate the optimal order quantity of newsvendor (retailer in this paper) and his minimal regret value. Unlike other paper describing uncertain parameters with probability function, we use only upper limit and lower limits to display demand. We adopt robust deviation criterion to minimize the absolute regret and treat it as the determine principle. Finally, we achieve a result that when commodity availability or tag price meets some specific conditions, investing RFID can be rather profitable.Keywords: inventory inaccuracy, robust optimization, RFID technology
Operation Optimization of the Airport Check-In System
Authors: Xu Shun Zhi , Wang Rui Ming , Zhu Bo , Zhu Jin Fu , Du Jing
Published: October 2013

The optimization of check-in counter number and the efficiency of check-in system are the common demand of the airport and the airline. The former research on the optimization of the check-in system rarely involved the use of self-service check-in counter, in view of the use of self-service check-in rate will continue to rise and is likely to become the dominant check-in mode in the future, This paper will quantitative analysize the relationship between self-service check-in counter and the check-in system efficiency, it will give the check-in counter number when the optimal operation efficiency of check-in system based on the queuing theory. Finally, combined with a typical airline flight plan data to analysize the model efficiency, the results verify the feasibility and effectiveness of the method.
A Modular Factory Planning Approach Based on Vertical Integration of the Information Flow
Authors: Hoffmann Max , Meisen Tobias , Schilberg Daniel , Jeschke Sabina
Published: October 2013

The increasing complexity of products and consumer interests is facing more and more challenges to production planning. An innovative approach, which facilitates efficient planning, is represented by a model-based approach using the concept of the Digital Factory. In order to realize the vision of virtual production, modular solutions like simulations or optimization tools are merged into a holistic model that provides a digital mapping of the entire production process. In this work, a framework is described, which is capable to integrate planning modules by using an integrative information model. Based on intelligence approaches, multiple data is linked to reach a vertical integration of the information flow. These cross-linked data structures facilitate a consolidation of data from different levels of the production monitoring and management layers. The provided information is used to establish decision support systems, which enable an entirely holistic factory planning. The advantages of the approach are demonstrated by a process chain formation use case.
Genetic Algorithm for Single Machine Scheduling Problem with Setup Times
Authors: Ouyang Quan , Xu Hong Yun
Published: October 2013

This paper describes a genetic algorithm to solve the single machine scheduling problem with setup times, which uses the fixed two point crossover operator (F2PX) to produce new offspring chromosomes and uses the roulette wheel method in the selection of the chromosome population. In order to avoid the premature convergence we use a neighborhood based mutation operator to conduct disturbance in our genetic algorithm. Through the application of this genetic algorithm in practical scheduling problems, the effect of the genetic algorithm proposed in this paper is remarkable.
The Process Experimental Study on High Efficiency Deep Grinding for 9SiCr Alloy Steel with a CBN Wheel
Authors: Guo Zong Fu , Sheng Xiao Min , Xie Gui Zhi , Yin De Zhen , Li Wen Xin
Published: October 2013

This paper via investigate the process of 9SiCr alloy steel in high efficiency deep grinding to find the rule between grinding wheel speed vs depth of cut ap and speed of table vw with the grinding force and the surface quality. Intend to develop a suitable method of the grinding process of 9SiCr alloy steel in high efficiency deep grinding, to obtain high removal rate and good surface quality.
Synthesis of Lithium-Ion Battery Cathode Material LiFe0.95Mn0.05PO4/C Using FeCl3 Etching Waste as Iron Source
Authors: Guo Guang Hui , Chen Shan , Liu Fang Fang , Zhang Li Yu
Published: October 2013

In this paper, LiFe0.95Mn0.05PO4/C was prepared by using simulated FeCl3 etching waste as iron source for lithium-ion battery cathode materials. The structural and morphological properties of the samples were characterized by X-ray powder diffraction (XRD) and Scanning electron microscopy (SEM). The electrochemical performances of the sample were also investigated with charge and discharge test. The achieved results indicate that product obtained was confirmed to be LiFe0.95Mn0.05PO4 and has the advantage of high purity, small size and good electrochemical performance.
Hydrothermal Synthesis and Investigation of Photocatalytic Properties of Fe-N Co-Doped NaTaO3
Authors: Zhao Yan Ru , Xiang Tian Cheng , Han Pei Lin
Published: October 2013

Fe-N co-doped NaTaO3 was prepared by hydrothermal method with different Fe-N concentrations (Fe-N molar ratio 1:1) and characterized by the XRD, SME and UV-vis diffuse reflectance spectra. The results showed that Fe-N co-doped samples were given an increase surface and narrow band gap (2.92 eV) compared to pure NaTaO3. The sample doped with 0.15% Fe-N of a molar ratio displays highest photocatalytic activity in the degradation of methyl orange under visible light irradiation.
Investigation on the Effect of Complexing Agents and Concentrations on Electrodeposition of ZnS Film
Authors: Fan Fan , Shi Lu Dan , Liu Ke Gao
Published: October 2013

Abstract. Electrodeposition of ZnS thin film is affected by many factors. The effects of experimental conditions and concentrations of complexing agents on the electrochemical properties of plating solution were investigated. Electrochemical workstation was used to test cyclic voltammetry curves in different situations. According to the oxidation and reduction peaks of the curves, the experimental results showed that the effect of complexing agent was the best, while the ammonia was worst. With the increase of concentration of sodium citrate, reduction peak shifted to the negative part, in the meanwhile plating solution with 30 mmol/L of sodium citrate was the best condition for electrodeposition of ZnS thin film.
Effect of Pulse Magnetic Field on Primary Silicon in Al-20Si Alloy
Authors: Zhu Yan , Jiang Wen Yong , Guo Er Jun , Li Ji , Wang Kai Feng
Published: October 2013

Due to its good wear resistance, Al-20Si is widely used as piston. But coarse primary silicon greatly undermines the mechanical properties of Al-Si alloy. The primary silicon could be refined in pulse magnetic field with suitable magnetic flux density and magnetic field frequency. In this work, the microstructure of Al-20Si alloy with and without pulse magnetic field treatments was observed, and the influence mechanism of weak pulse magnetic on the microstructure of the alloy was investigated. The results showed that the grain size of primary silicon fluctuated with increasing magnetic flux density at 1Hz. The smallest grain size of primary silicon is obtained at 94mT. The grain size of the primary silicon decreased with increasing magnetic field frequency under the magnetic flux density of 94mT.
Preparation of Novel B, N, S-Containing Tri(hydroxymethyl)propane Esters and its Friction-Reducing Performance as Additives in Rapeseed Oil
Authors: Ji Xian Bing , Chen Yin Xia
Published: October 2013

Three novel B, N, S-containing tri(hydroxymethyl) propane (TMP) esters with different alkyl chains were synthesized and characterized. Thermal degradation tests were performed to analyze their thermal stability using a thermo-gravimetric analyzer. The friction-reducing performance of the synthesized compounds as additives in rapeseed oil (RO) was evaluated with a four-ball tester. The results show that the novel B, N, S-containing TMP esters have excellent thermal stability and possess good friction-reducing behavior when they are used as additives in rapeseed oil.
Starch-Based Biodegradable Packaging Materials of Antimicrobial
Authors: Wang Ju Wei
Published: October 2013

With the gradual increase of the global environmental awareness and environmentally friendly voice rising, the deal with the problem of plastic waste has become the focus of public opinion around the world has also become a hot topic of scientific research. This paper can be made of polystyrene as main raw material, adding starch and antibacterial agents containing silver nanoscale titanium dioxide, and by the synthesis of biodegradable packaging materials performance. The results showed that: 0.25mm sheet of polystyrene made of the thickness of the main raw material by injection molding process, and factors affecting the performance of the sheet, the better the performance of the film material process parameters. According to the definition of the GB/T1040-92 national standards of the People's Republic of China "plastic tensile properties of test methods and GB/T20197-2006 degradable plastics, classification, marking, and degradation of the performance requirements" and GB4789.3-94 "State Microbiological examination of coli form bacteria in the standard of food hygiene as determined by experimental methods for testing. The orthogonal experiment results show that the expandable polystyrene Dosage: 80%; starch dosage: 2%; toluene, acetone and put ratio: 3:2 .The mechanics of materials, degradation, and antimicrobial properties.
Morphology of Polyethylene/Montmorillonite Nanocomposites Prepared by In Situ Polymerization
Authors: Li Min , Xiao Li Guang , Zhao Hong Kai
Published: October 2013

Polyethylene/montmorillonite (PE/MMT) nanocomposites were prepared by in situ polymerization. The morphology of MMT/MgCl2/TiCl4 catalyst and PE/MMT nanocomposites was investigated by scanning electron microscopy (SEM). It can be seen that MMT/MgCl2/TiCl4 catalyst remained the original MMT sheet structures and many holes were found in MMT and the morphology of PE/MMT nanocomposites is part of the sheet in the form of existence, as most of the petal structure. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were carried out to characterize all the samples. XRD results reveal that the original basal reflection peak of PEI1 and PEI2 disappears completely and that of PEI3 become very weak. MMT/MgCl2/TiCl4 catalyst was finely dispersed in the PE matrix. Instead of being individually dispersed, most layers were found in thin stacks comprising several swollen layers.
Preparation and Characterization of Al2O3 High Density Ceramic Materials
Authors: Jia Chun Yan , Li Dong Hong , Liu Yong He
Published: October 2013

With sub-micron alumina powder as raw material, high alumina ceramics were prepared through isostatic compaction. The volume density and shrinkage ratio were investigated. The influence of sintering temperature and molding pressure were studied on volume density and shrinkage ratio of ceramic. The results indicated that sintering characteristic of alumina ceramics could be improved at the appropriate sintering temperature and molding pressure and its sintering temperature could be decreased by using sub-micron alumina powder as raw material. 95 ceramics were prepared using sub-micron alumina as raw material, when the sintering temperature was 1550°C, molding pressure was 12 t, and ceramic volume density could be achieved 3.71g /cm3.
A Phase-Selective Supramolecular Gelator as Oil Solidifier
Authors: Liu Shao Zhu , Liu Wei Li , Liu Zhi Gang , Li Jing Chang , Zhang Xiao Chun , Liu Yu Yan , Wang Yong Zhen
Published: October 2013

A simple sugar-derived supramolecular gelator of 1,6-dicaprylate sorbitan ester was designed and prepared as new oil solidifier. The gelation tests revealed that the gelator can gel or phase-selectively gel fuel oils, edible oils and some organic solvents. And the SEM images showed the structure of 3D fiber network was formed in the process of gelation. What’s more, the rate of oil removal in water was 85% and the recovery rate of spilled oils reached up to 60.29%.
Research on Fabricating of Square Aperture Spherical Micro-Lens Array through the Laser Lithography
Authors: Sun Yan Jun , Yu Yan Xin
Published: October 2013

Due to the practical problems nowadays that the duty cycle is small and the utility rate of solar energy is low of photoelectric sensor light sensitive array, and having analyzed the advantages on solar energy utilization of square aperture spherical micro-lens than traditional circular aperture micro-lens array, we conduct a research on the fabricating of square aperture spherical micro-lens and testing technology. With the help of light spread theory, we analyses the relationship between light amplitude distributing rules, exposure length and exposure energy, establish a mathematical model of light distributing rules and use computer software to emulate the model. The results indicate solar energy distributes regularly in adhesive film. If the energy is fixed, exposure length will gradually become saturated following time. At the same time, we fabricate infrared quartz micro-lens array with array 256×256, single element lens 40×40μm, spherical radius 60μm, single element spacing 1μm.The experiment data are the same as emulation results.
Thermal Management Simulation of Lithium Ion Batteries for EV/HEV
Authors: Hadia Fofana Gaoussou , Zhang You Tong
Published: October 2013

In this paper, we propose a three-dimensional analytical model based on Greens Function to investigate the Impact of temperature rising on simple lithium-ion batteries and control the heat generation during charge/discharge of battery operation. The modeling is based on heat-transform mechanism analysis method that gives a closed-form solution for the fundamental problem of heat conduction in battery cores with orthotropic thermal conductivities. The method uses a simple lithium-ion battery examined, considered the ambient temperature and initial temperature as 25°C, subjected to transient heat generation in various convective cooling boundary conditions at its surfaces.
Solutions for the Finite Deformation Elastic Rod Nonlinear Wave Equation
Authors: Shi Jing , Yan Xin Li , Deng Qing Tian
Published: October 2013

The solving process of the hyperbola function method is introduced in this paper. By using hyperbola function method, the analytical solutions of nonlinear wave equation of a finite deformation elastic circular rod and the variant Boussinesq equations are studied. The more physical specifications of these nonlinear equations have been identified.
Study on Release Process of Micro-CAES Used Screw Expander
Authors: Liu Guang Bin , Yang Qi Chao , Qian Ze Gang , Zhao Yuan Yang , Wang Le , Li Lian Sheng , Tang Bin
Published: October 2013

The compressed air energy storage (CAES) has a promising application prospect to ease electic load and match intermittent renewable energy, such as solar and wind energy. The release process influences the output power and system performance. In this paper, a mathematical model is built to simulate the release process of a micro-CAES system with screw expanders. The results show that the rotation angles of suction, expansion and discharge processes are depended on the volume ratio. The chamber volume of 2ndstage expander is larger than the 1ststage one for two expanders. In the constant suction pressure (CSP) condition, the mass remained in the tank is lower slightly than it in the various suction pressure (VSP) condition for the same set pressure in the tank. The CSP condition needs more time to finish the release process. The decrease of air temperature in the CSP condition is smaller than it in the VSP one. The power output decreases with time in the VSP condition, but it is a constant value throughout the release process in the CSP condition. All the average output and the total work in the VSP condition are larger than them in the CSP condition.
Analysis of Turbine Impeller Vibration Test Equipment
Authors: Pan Hong Gang , Xu You Ning , Yi Dong Lai , Sun Jing Chao , Du Peng Fei , Zhang Chun Ming
Published: October 2013

The mode of the impeller of steam turbines vibration frequency is recorded by simulated experiment of the impellers vibration in the exciting method. And the main negative effects for the impeller of steam turbines vibration are analyzed through the simulated experiment, so the impellers vibration can be avoided through modulating the targeted elements. The accident during the steam turbines running caused by the impellers vibration can be decreased.
Thermal Analysis and Optimization of High Power LED Automotive Headlamp Cooling Device
Authors: Zhao Xin Jie , Cai Yi Xi , Wang Jing , Li Xiao Hua , Zhang Chun
Published: October 2013

High power LED headlamp cannot operate normally and efficiently in case the maximum junction temperature exceeds 120°C. Therefore, it is essential to install external cooling device with excellent thermal management. A model based on plate-fin heat sink is presented, the heat transfer plates (HTPS) are added to bridge aluminum substrate and heat sink. And its thermal performance is evaluated compared with the one only installing heat sink. Results reveal the HTPS coupled with heat sink has a good cooling performance. In addition, the correlation between the junction temperature and the HTPS length is investigated. The optimum length is 47 mm. Furthermore, considerable simulation and experiment are conducted on the junction temperature variation subject to input power, ambient temperature, as well as the installation angle respectively. Finally, a fan is added based on the original device to enhance cooling. It indicates that the junction temperature decreases gradually with the presence of velocity air flow.
Biomechanics Quick Response System Research of Vault Technical Training
Authors: Zhou Ji He , Gao Zhan Le , Liu Yi , Liu Li
Published: October 2013

We protocol to research and develop sport biomechanics quick response system for vault technical training, which quick analyzes vault techniques of athletes by using pressure plate on vault board to collect data of step position and strength, combined with synchronous acquisition of coxa joint kinematic parameters. This is helpful to improve the technical training effective of vault gymnast. We use a regular camera to shoot the positive side of athletes. At the same time the pressure plate is placed on vault board to collect dynamic data. Use MATLAB as a development platform, and input the video image of the athletes. The software automatically recognizes tracking coxa joint colored blocks, records the coordinates, and calculates position shift, velocity and other statistics of coxa joint accordingly. Pressure plate with built-in software BioWare can export pressure data and save it as a .txt format. Through programming, MATLAB can read kinetic data of pressure plate in .txt format, and synchronically analyze vault gymnasts movement with tracking kinematics data of coxa joint trajectory. Researching and developing this system is generated from practically overcoming the difficulty in vault training. The features of this system are to collect and analyze data with simplicity and quickness. This system is mainly comprised by normal camera equipment and pressure plate, which can provide a technical diagnose report with kinematics and kinetics parameters in one time vault exercise. For coaches and gymnasts, this report can be used as reference to provide improvement comments in vault daily training, as well as enhance effectiveness and efficiency of vault technical training.
The Achievement of Dynamic Load Simulator of Servo Mechanism of Multiple DOF Thrust Vector
Authors: Song Jia , Zhang Jin Ying , Sun Meng , Sun Meng
Published: October 2013

In order to better analyze the load resonant characteristic of thrust vector servo mechanism of spacecrafts, multiple DOF mathematical models were established. Combined with the need of simulated actual conditions for ground tests, a comprehensive load simulator containing mechanical and hydraulic load was presented. The simulation results show that, the dynamic characteristics of output load displacement of the simulator is in agreement with the characteristics of actual system. The simulation and experimental results verify the feasibility of this load simulator structure, which could provide design reference for developing equipment of thrust vector control system for ground tests.
Torsional Vibration Analysis for Large-Scale Reciprocating Compressor Crankshaft
Authors: Zhan Ke , Yu Xiao Ling , Yu Bin Yan , Xie Jia
Published: October 2013

This paper presents a new method which combined multi-body dynamics theory and finite element technology to calculate transient stress of the crankshaft of the large-scale reciprocating compressor. On the basis of multi-body dynamics theory, the kinematical simulation of the crankshaft, the connecting rod, the piston and other components were performed, and thus to get the vibration modal of the crankshaft. So we can judge whether the crankshafts torsional resonance will happen, as well as get the real loads on the crankshaft when it worked. Then the transient stress of the crankshaft can be calculated using finite element technology. Comparing to traditional stress calculating methods, this new method not only considers the variable inertia which caused by reciprocating masss movement, but also can calculate the integrated vibration stress of crankshaft in three directions, including torsion, lateral and axial. Therefore, this method can describe dynamic characteristics of the crankshaft more accurately and more entirely.
Effects of 1-Ethyl-3-(3-Dimethylaminopropyl) Carbodiimide Cross-Linking Duration on the Structure of Chitosan/Gelatin Composite Bone Scaffolds
Authors: Lin Jia Horng , Wen Shih Peng , Chung Hsiu Ying , Chen Wen Cheng , Lou Ching Wen
Published: October 2013

Freeze-drying method can create three-dimensional, porous structure bone scaffolds, the pore size of which can be changed by a cross-linking agent. This study dissolves chitosan powder in a 1 v/v % acetic acid aqueous solution to form a 2 w/v% chitosan solution. The chitosan solution and a 4 w/v % gelatin aqueous solution are blended to form Chitosan/Gelatin mixture, after which the mixture is frozen at-20 °C for 1 hour, removed, and cross-linked with a 0.5 v/v % 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) solution for different durations. The cross-linked mixture is frozen at-20 °C for 1 hour and then freeze-dried for 24 hours to form Chitosan/Gelatin composite bone scaffolds. A stereomicroscope and a scanning electron microscopes (SEM) and Image Pro Plus are used to observe the surface and pore size of the bond scaffolds, and in vitro evaluates their biocompatibility. The experiment results show that resulting bone scaffolds possess a uniform pore distribution a desirable biocompatibility.