bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Data-Driven Prediction Algorithms for Lithium-Ion Batteries Remaining Useful Life
Authors: Jiang Lin , Xian Wei Ming , Long Bin , Wang Hou Jun
Published: July 2013

As one of the most widely used energy storage systems, lithium-ion batteries are attracting more and more attention, and the estimation of lithium-ion batteries remaining useful life (RUL) becoming a critical problem. Generally, RUL can be predicted in two ways: physics of failure (PoF) method and data driven method. Due to the internal electro-chemical reactions are either inaccessible to sensors or hard to measure; the data-driven method is adopted because it does not require specific knowledge of material properties. In this paper, three data-driven algorithms, i.e., Support Vector Machine (SVM), Autoregressive Moving Average (ARMA), and Particle Filtering (PF) are presented for RUL prediction. The lithium-ion battery aging experiment data set has been trained to implement simulation. Based on the RUL prediction result, we can conclude that: (1) ARMA model achieved better result than SVM, however, the result shows a linear trend, which fail to properly reflect the degradation trend of the battery; (2) SVM often suffers from over fitting problem and is more suitable for single-step prediction; and (3) PF approach achieved a better prediction and reflected the trends of degradation of the battery owing to its combined with specific model.
Numerical and Experiment Study of Residual Stress and Strain in Multi-Pass GMA Welding
Authors: Chand Reenal Ritesh , Kim Ill Soo , Lee Ji Hye , Kim Ji Sun
Published: July 2013

There must selection an optimal of welding parameter and condition that reduces the risk of mechanical failures on weld structures.The residual stress and welding deformation have the large impact on the failure of welded structures.To achieve the required precision for welded structures, it is required to predict the welding distortions at the early stages.Therefore, this study uses 2DFinite Element Method (FEM) to predict residual stress and strain on thick SS400 steel metal plate. A birth and death technique is employed to control the each weld pass welding. Gas Metal Arc (GMA) welding experiment is also performed with similar welding condition to validate the FE results.The simulated and experiment results provide good evidence that heat input is main dependent on the welding parameter and residual stress and distortions are mainly affected by amount on heat input during each weld-pass.
A Java-Based Package for Genetic Algorithm
Authors: Qiao Shan Ping , Yan Bao Qiang
Published: July 2013

Genetic algorithm is a very important and popular kind of algorithm of evolution computing. In order to use this algorithm better and platform-independently, this paper introduces an implement package which is coded in Java, an object-oriented and platform-independent advanced computer programming language, for genetic algorithm. This package includes several sub-packages. In each sub-package, there are some classes with different roles and functions. After the test, these classes can work properly and efficiently in together. The good effect has been received through using this algorithm in four function optimization problems. For the further goal, some studies even need to be carried out in the future.
Bio-Inspired Algorithm for the Shortest Path According to the Maximum Time for Each Trial
Authors: Lee Seung Gwan , Lee Seung Won
Published: July 2013

Ant Colony System (ACS) is a new meta heuristics algorithms to solve hard combinatorial optimization problems. In this paper, we propose hybrid ant colony algotirhm that is searching the second best edge first in the state transition rule and updating the pheromone on edges applying the visited number of edge in the globally best tour. And we evaluate the proposed algorithm according to the maximum time for each trial. The results of a simulation experiment demonstrate that the proposed algorithm is better than, or, at least as good as, that of ACS algorithm in the most sets.
Performance Analysis on Yamanaka Patterned Color Filter Array
Authors: Jeon Gwang Gil
Published: July 2013

Generally, a digital camera employs a single CCD or CMOS sensor. In a color imaging device, the color information is usually obtained in sub-sampled patterns of red, green and blue pixels. Thus, full-resolution color is afterward created from this sub-sampled CFA image. This process is normally called as demosaicking. In this paper, we analyze performance of Yamanaka patterned CFA in terms of CPSNR and S-CIELAB. We show the simulation results on test images.
Face Alignment for Robust to Background and Occlusion Using Variation of 3D Reference Shape
Authors: Kang Seok Hoon
Published: July 2013

A Constrained Local Models is face tracking method based on variation of shape in the Allowable Shape Domain. The CLMs perform optimize strategy in patch. It has problem because occlusion and background. In this paper, variation of shape is constrained for solving this problem.The generating of shape allows only shape adjusted translation, rotation, scale. The proposed method prevent that the shape generate to abnormal forms. As a result, the alignment error is about 4.2 pixels in environment has complex background. Also, when part of the face occluded, the alignment error is about 18.1pixels.
Sensor Noise Assessment Approach in a Patterned Region
Authors: Jeon Gwang Gil
Published: July 2013

In this paper, we propose a simple noise assessment approach for sensors. We assume the input signal is contaminated by white additive and zero mean Gaussian noise which. To measure the noise level, we the intensity-homogeneous blocks are found first, and then we evaluate the noise variance in the blocks. To determined intensity-homogeneous blocks, we use high pass filter. Experimental results show that the presented method provides good performance for natural and artificial images over a large range of noise levels.
Synthesis and Characterization of Poly(Ethylene Terephthalate) /Al2O3 Nanocomposites
Authors: Lim Sang Kyoo , Choi Won Mi , Choi Hyun Jung , Hong Seong Hui , Hwang Sung Ho , Kim Soon Hyun , Lee Sung Hwan , Kim Kyeong Wung
Published: July 2013

Poly (ethylene terephthalate)(PET)/Al2O3nanocomposites via in situ polymerization were studied. The nanoparticle loading was varied from 0.3 to 1 wt.%. From the DSC results, no significant differences were recorded for melting temperatures. However, simple added PET/Al2O3nanocomposites slightly changed to the lower melting temperature. Morphology of the nanocomposites has been examined by SEM. From the SEM results revealed that dispersed Al2O3nanoparticles in the EG (ethylene glycol) during the polymerization can be well dispersed in PET matrix.
Synthesis Method of Fault Tolerant Control System for Manipulators
Authors: Filaretov Vladimir , Zhirabok Alexey , Zuev Alexander , Procenko Alexander
Published: July 2013

This paper presents the synthesis method of an effective fault tolerant control system for actuators of manipulators which are described by nonlinear differential equations with variable parameters. This system ensures due to specifically formed additional control signal insensitivity to faults arising in actuators . This allows ensuring the operation efficiency of manipulators in aggressive and extremal environment. The results of simulation confirmed the efficiency of the proposed method.
Method of Semiautomatic Position Control by Manipulator Using Telecamera which Changes its Orientation
Authors: Filaretov Vladimir , Katsurin Alexey
Published: July 2013

This paper describes the method of semiautomatic position telecontrol by a multi-link manipulator using a setting device (SD). In this setup the kinematic schemes of the manipulator and the SD are different. The television camera in zone of work can change its spatial orientation. It can rotate around two mutually perpendicular axes by operator commands. The algorithm of work of computing system which forms setting signals for drives of manipulator is also represented in the paper. The results of executed experiments and mathematical simulation of the system work confirm effectiveness of this method.
Application of Computer Virtual Technology in Metal Packaging Design
Authors: Dan Li , Ping Hu Wei
Published: July 2013

Application of three-dimensional modeling software based on rhinoceros as well as V-ray for rhinoceros in metal packaging design is introduced. The paper conducts detailed discussion on computer virtual technology featuring double-sided metal material and bump graphic effects in the process of metal packaging design, providing effective methods for designing of such packaging container and virtual demonstration.
A Cloud-Based Tele-Rehabilitation System for Frozen Shoulder
Authors: Yeh Shih Ching , Lee Si Huei , Fank Yao Jhong , Gong Yi Hang , Lin Jyun Han , Hsieh Yi Chun
Published: July 2013

A home-based motion-sensing tele-rehabilitation system that incorporated motion-sensing technology and cloud technology was developed for improving the rehabilitation mode of patients with frozen shoulder. The system will enable the patients to carry out motion-sensing rehabilitation at home and its rehabilitation results can be calculated and analyzed instantly in terms of motion effect index with cloud computing technology. The system will also enable medical professionals to find out patients rehabilitation status via a cloud system and issue personalized prescriptions of home-based rehabilitation system for individual patients.
An Improved CAMSHIFT Tracking Algorithm Applying on Surveillance Videos
Authors: Yen Shwu Huey , Chien Jui Chen , Lin Hsiao Tsung
Published: July 2013

In this paper, we present an improved version of CAMSHIFT algorithm applying on surveillance videos. A 2D, hue and brightness, histogram is used to describe the color feature of the target. In this way, videos with poor quality or achromatic points can be characterized better. The flooding process and contribution evaluation are executed to obtain a precise target histogram which reflects true color information and enhances discrimination ability. The proposed method is compared with existing methods and shows steady and satisfactory results.
Data Collection for Medical Data Warehouse Research
Authors: Chen Yu Ke , Zhao Tai Xiang
Published: July 2013

We propose an easy method for data collection and central data warehouse design. This method can be used with or without other software development frameworks.We explain thoroughly those aspects that influenced the methodology building.The methodology is defined by four steps, which can be aligned with various iterative development frameworks. We describe here the alignment of our methodology with the RUP(rational unified process) framework.
The Study of Construction Bill of Quantities Pricing System Based on Software Reuse-Based
Authors: Wang Xiao Bin , Wang Shou Jin , Wang Qing Jun
Published: July 2013

The implementation of the construction bill of quantities (BOQ) pricing system is an important measure for deepening project cost management, and it is not only an important way to promote the construction project marketable and international, but also one of the measures for regulate the construction markets .In-depth study of the existing BOQ software, proposed construction projects BOQ system development based on software reuse. During the cause of system development software reuse is used, the function of the system model and the model of system development the soft component are given, with a soft component to assemble the system. The software reuse-based development model, with soft component assembly systems, it is not only speeding up the development progress and development costs, but also can improve the maintainability and scalability of the software.
Research on the Design Method of Combat Action Military Concept Model in Digital Battlefield
Authors: Liu Zhong Peng , Li Si , Liu Jie
Published: July 2013

Directed to the problems of the military concept model in the digital battlefield, such as the indeeded definitions,the unfull contents and the non-system process.this paper defines the intension and extension of the military concept model in the war action,makes the standard contents,and definitudes the principle.at last, using the engineering science,it advances the exploiting process of models,and gives us a primary basic theories of the military concept models in the digital battlefield war action.
On the Application and the Development Trend of Mechatronics Technology
Authors: Wang Huan Yun , Pan Chun Hui
Published: July 2013

Mechatronics is an integration technology which is the mutual penetration of mechanical technology, microelectronic technology and information technology and the inevitable development trend of electromechanical industry. This paper describes the overview, core technology and main application fields of mechatronics technology and points out its development trend.
Extraction of Stress Intensity Factors for the Simulation of 3-D Crack Growth with the Generalized Finite Element Method
Authors: Garzon J. , Duarte C.A. , Pereira J.P.
Published: July 2013

Two methods for the extraction of Stress Intensity Factors (SIFs) from three-dimensional (3-D)problems are presented: the Contour Integral Method and the Cutoff Function Method. The formula-tions are tailored for the Generalized Finite ElementMethod andmixed-mode 3-D propagating cracks.The case of crack faces loaded by prescribed tractions is also considered. Another contribution of thispaper is a procedure to control the noise of extracted SIFs based on theMoving Least SquaresMethod.The proposed approach provides a continuous and smooth approximation of 3-D SIF functions foreach fracture mode. Numerical experiments demonstrating the accuracy and robustness of the pro-posed methodology are presented. They include 3-D mixed-mode fatigue crack growth simulationsand the case of a pressurized crack.
Extent of the Surface Region in Notched Middle Cracked Tension Specimens
Authors: Branco R. , Antunes F.V. , Costa J.D.
Published: July 2013

This article aims at evaluating the extent of the surface region in notched Middle Cracked Tension specimens. Firstly, a fully automatic fatigue crack growth technique is developed to obtain stable crack shapes. After that, the stress triaxiality along the crack front is evaluated for different notch shapes. Then, objective criteria are defined to quantify the extent of the surface region from the stress triaxiality data collected. Next, the extent of the surface region is related to the elastic stress concentration factor of the uncracked geometry by a linear relationship. Finally, empirical two-constant equations able to evaluate the extent of the surface region from the thickness, notch radius, notch depth and elastic stress concentration factor are formulated.
Experimental Analysis of the Damage Zone around Crack Tip for Rubberlike Materials under Mode-I Fracture Condition
Authors: Li Xiao Lei , Li Xiao Jing , Sang Jian Bing , Qie Yan Hui , Tu Yao Ping , Zhang Cheng Bo
Published: July 2013

Studying the deformation and fracture properties of soft materials can not only provide insight into the physical mechanisms underlying their superior properties and functions but also benefit the design and fabrication of rubberlike materials. In this paper, an application of the experimental digital moire method to determine the damage zone around crack tip for rubberlike material is presented. The measurement principles and the basic procedures of the method are explained in detail. The in-plane defomation distributions of crack tip fields under Mode I fracture condition are measured. In addition, the deformation of crack tip fields in the damage zones is also analyzed using the sector division mode. Finally, an analysis of the damage zone is proposed to describe crack-tip fields in rubber-like materials with large deformation.
Study on Structure and Properties of Polysulfone Membranes Using Ionic Liquid [n-C16mim][BF4] as a New Structure-Controlled Additive
Authors: Ding Ying Ying , Zhao Ya Mei , Zheng Chang Zheng , Tu Dong Huai
Published: July 2013

Introducing ionic liquid [n-C16mim][BF4] as a new structure-controlled additive, Polysulfone (PSf) membranes were prepared by the wet-phase-inversion using [n-C16mim][BF4] into the casting solution (PSf/NMP). The scanning electron microscope and the atomic force microscopy were utilized to visualize the cross-sections of the membranes to gain more better understanding the structure-controlled ability of [n-C16mim][BF4] and surface morphologies of the membrane. The results indicate that the structures of the membranes were typical bilayer asymmetric finger-pores structure. [n-C16mim][BF4] has stronger ability of the pore-forming. Especially, at the 4:76 ratio of [n-C16mim][BF4]/NMP in the polymer solution ,the membrane has the asymmetric structure and good separation properties of the solution flux. The PSf membrane has the 0.45~0.65μm dimpling close to surface layer, and the retention rate and solution flux of the prepared membrane are 95.2% and 137.5 L•h-1•m-2. Meanwhile, [n-C16mim][BF4] partially retained in the prepared Polysulfone membrane reduced the contact angles of Polysulfone membranes, improving the hydrophilic properties of the membranes.
The Effect of AIREBO on Thermal Conductivity of EPDM Networks
Authors: Ma Lian Xiang , Yang Gang , Tang Yuan Zheng , He Yan
Published: July 2013

In this article, thermal conductivity of EPDM networks has been discussed using molecular dynamics simulations. The simulations are performed on four systems using adaptive intermolecular reactive empirical bond order (AIREBO) potential. The effect of Lennard-Jones (L-J) potential and torsion potential on thermal conductivity is discussed. The contribution of L-J potential to thermal conductivity is negative. However, contribution of torsion potential is positive. The results suggest that the randomly entanglement of molecular chains in EPDM networks is responsible for its low thermal conductivity.
Modal Analysis of the Frame of YlJ Series Tire Uniformity Testing Machine
Authors: Duan Zhen Ya , Song Bo , Song Guan Ying , Lu Zhong Yu , Hang Bai Lin
Published: July 2013

A finite element model of the frame was established based on studying structure parameters of the YLJ series tire uniformity testing machine (TUTM). For the purpose of dynamic analysis of the frame of the YLJ series TUTM, make use of model analysis function of ANSYS to work out the first six-mode natural frequencies and vibration modes. Analysis results show that the first three-mode frequencies of the frame are 20.7 Hz, 21.9 Hz and 30.8Hz, which are far greater than working frequency of the spindle, 1 Hz. As is known, the natural frequency of the frame should be forty times more than the rotation of tire when the force variation of the tire is decomposed into tenth harmonic. In this situation, the low mode natural frequencies of the frame cannot meet this requirement, which have great influence on the test accuracy of the TUTM. The research results in this paper will provide helpful theoretical support to improve test accuracy of the YLJ series TUTM．
Finite Element Analysis for Effect of Double Firm Rings on Grounding Performance of Aircraft Tire
Authors: Zhang Ge , Jiao Zhi Wei , Liu Yong , Liu Yue Xing , Yan Hua , Ding Yu Mei , Yang Wei Min
Published: July 2013

The article proposed a kind of new structure for aircraft tire, which includes double firm rings. The aircraft tire of double firm rings was simulated in the instant of landing by finite element analysis, then the simulation result was compared with the one of ordinary aircraft tire. The result indicated that the grounding area and deformation of aircraft tire with double firm rings was less than that of ordinary aircraft tire, which can decrease the rolling resistance and improve high speed performance. In addition, the larger contact pressure located the central region of the contact surface, which can reduce the damage of shoulder rubber and lengthen the life of the aircraft tire.
Preparation and Evaluation of Molecular Imprinted Polymers of Erythromycin
Authors: Gong Guo Li , Chen Song , Li Hui
Published: July 2013

Molecular imprinted polymers were synthesized with precipitation polymerization in the present study when Erythromycin was used as template, methacrylic acid as functional monomer, and ethylene glycol dimethacrylate as cross-linker. The best synthesis solution was ultimately determined when the bonding property of the polymer was studied. The selectivity of imprinted polymer on Erythromycin was also studied. The equilibrium binding experiments showed that the binding site of MIPs was heterogeneous with one binding site. Equilibrium dissociation constant was 0.663mg/ml, maximum apparent adsorption was 91.39mg/g.
Numerical Investigation of Mixing Properties of Continuous Mixer with New-Type Rotors
Authors: An Ying , Ma Kun , Wang Jian Qiang , He Xue Tao , Shao Jian Bo , Ding Yu Mei
Published: July 2013

In this paper, the 3D flow field and dynamic mixing processing in the continuous mixer with new-type rotors have been studied using finite element software package Polyflow. The influences of continuous mixer process conditions on mixing properties were analyzed by numerical simulation. The results show that the dispersion property is mainly affected by the rotational speed of rotors and the viscosity of polymer. Better dispersion property can be gained as and the viscosity increase. However, the distribution property is mainly affected by feed rate, and the distribution efficiency will reduce if feed rate is too fast.
A Numerical Investigation on Temperature Field in the Oven of a Rotational Molding Machine
Authors: Guan Chang Feng , Peng Wei , Qin Liu , Zhang You Chen , Yang Wei Min
Published: July 2013

A simplified 3D model of a rotational molding machine oven was built, and a numerical investigation was carried out with the RNG k-ε approach in FLUENT. Since the temperature field in the original oven structure was distributed unevenly, three types of reformed designs were proposed and numerically studied. Results showed that by changing the inclined angle of inlet flow to 30° downward, hot air flowed onto the mold surface directly, the temperature field around the mold became more uniform but temperature in the bottom of the mold was still a little bit low. By changing the inclined angle of hot air to 30° downward and 45° rightward and leftward, or by changing both the cross sectional dimension of the inlet to 900mm×400mm and the inclined angle of hot air to 30° downward, the temperature field became more uniform and the average temperature around the mold remained relatively high, these two reformed designs were effective with good feasibility and economic efficiency, which could be considered in the future design of rotational molding machine.
Experiment Research on Single Step Mixing at Low Temperature
Authors: Wang Chuan Sheng , Ren Na , Song Guo Zong , An Shuai , Zhao Shu Hong
Published: July 2013

On the basis of reading a large number of literatures and collecting information, this article provides an experiment research on the single step mixing at low temperature. According to the principle of the single step mixing at low temperature, the feasible experiment platform is designed and several important technological parameters are selected; and the experiment is conducted adopting the orthogonal experiment, and the best technological parameters have been finally found out.
Development of Inner Mould Direct-Pressure Tire Vulcanization Technology Equipment
Authors: Zhang Jin Yun , Jiao Zhi Wei , Liu Yue Xing , Zhang You Chen , Yang Wei Min
Published: July 2013

Traditional tire vulcanization technology has notable drawbacks,for example,the heat transfer is uneven and uniformity of a tire is low.A new type of inner mould direct-pressure tire vulcanization technology is introduced.The new technology method can solve probloms in traditional tire vulcanization by utilizing the building drum to replace the curing bladder of the central mechanism and using electromagnetic-induction heating method to heat green tire cavity. This paper mainly illustrates the development process of the inner mould direct-pressure tire vulcanization technology equipment based on the current tire shaping press vulcanizer.
Effect of Different Parking Time on Mixing Rubber’s Physical Properties in Two-Stage Mixing Process
Authors: Wang Chuan Sheng , Liu Wei Wei
Published: July 2013

One-stage mixing refers to put rubber and additions into the mixing room and make a cycle mixing process. Two-stage mixing refers to make another cycle mixing process to the compound which producted by the one-stage mixing process after parking a certain time.In this paper, traditional internal mixer’s two-stage mixing experiments under different parking time were studied and the experimental results were that the best parking time was 8 hours.
Experimental Research on the Influence of the Open Mill Mixing Process Technological Parameters on the Mixing Quality
Authors: Zeng Xian Kui , Wang Dong , An Shuai , Zhao Shu Hong , Song Guo Zong
Published: July 2013

This experiment adapt orthogonal experimental method, producing the experimental study on the impact of the open mill mixing process technological parameters on the mixing quality, using the open mill intelligent mixing experimental platform which are designed and developed dependently and a variety of advanced experimental equipment. Finally, find the optimal technological parameters for the open mill mixing process, and are the roller spacing 0.6mm, the best roller speed 29r/min, the best roller speed ratio 1.25, the best mixing temperature50°C, the best mixing time 18.5min, respectively.
Finite Element Analysis for Effect of Different Carcass on Performance of Aircraft Tire
Authors: Jiao Zhi Wei , Zhang Ge , Liu Yong , Liu Yue Xing , Yan Hua , Ding Yu Mei , Yang Wei Min
Published: July 2013

Three different kinds of carcass A, B and C for aircraft tires were presented in the article, which is based on the different length of rolling up for carcass cord across the bead ring. And then they were simulated by applying finite element analysis method when aircraft tire was landing in an instant. The simulation results indicated that, the carcass structure of rolling up from the side of bead extending to the other bead (A type) has the minimum deformation, which can reduce the outward of bulge for the side wall and effectively resolve the failure problem for rubber in the sidewall of tire , what’s more , it can prolong the life of aircraft tire to a certain degree and provide good braking performance.
Numerical Study on Film Foam Flow Characteristics in a Straight Duct
Authors: Du Dong Xing , Zhang Fa Hu , Geng Dian Cai , Li Ying Ge
Published: July 2013

Straight ducts capture some essential features of the motion of foam in porous media in petroleum industry. In this paper, Surface Evolver was employed to build the mathematical model to study the flow behavior of lamellas in the duct with different models. Numerical results show good agreement with experiments and some important features of lamella flow behavior in straight ducts are obtained. It is concluded that, the physical model with viscous force can adequately describe the flow characteristics of reality foam in the experiment. The actual pressure difference consists of the pressure difference caused by the curvature of the lamellas and the drag force on the boundary wall. Under the ideal condition of without drag force along the wall, the pressure drop for lamella flow in the duct is zero, and the shape and the velocity of the lamellas will maintain constant.
The Oil Temperature Controlling of Hydraulic Pump Performance Test-System
Authors: Sun Bei , Zhang Xue Man , Sun Kai Ge
Published: July 2013

In the testing of the oil temperature controlling of hydraulic pump performance test-system, the changing of oil temperature bring the testing accuracy decrease, so it can influence nicety and contrast of test-bed. A computer device of oil temperature real time control are designed. The result of control achieve B level accuracy of international and guild. The software of computer is minimum variance correcting by oneself.
The Selection of Filter Technical Parameters in Carbon Black Pneumatic Conveying System
Authors: Li Zhi Hua , Peng Zong Xiang , Zhou Yun Jie
Published: July 2013

According to the properties of carbon black, this paper considers that the better filter as the dust removal equipment for carbon black pneumatic conveying system is pulse bag filter, describes the structure and working principle of the pulse bag filter, puts forward the factors to be considered and technical parameters to be selected to make sure that the carbon black pneumatic conveying system can work long and stably.
Modal Analysis of the Cylinder Mechanism Based on ANSYS Workbench
Authors: Chang De Gong , Dou Hong Yun , Yang Fu Qin , Zong Rong
Published: July 2013

According to the working principle and structural characteristics of cylinder mechanism, the simplified model is built by the Pro/E software. Then we carry on the modal analysis for cylinder mechanism combined with ANSYS Workbench [1], and obtain the natural frequency and mode shapes of all steps. It provides the basis for optimization design and safety evaluation of cylinder mechanism. Finally, we study the influence of bearing stiffness on the critical speed, which provides the basis for the research of high-speed cylinder.
Identification of Location and Orientation for Terminal Blocks Based on Template Matching
Authors: Cui Yu Xia , Li Yang , Wang Hua Jie , Wang Xian Lun
Published: July 2013

A template matching method based on a vision system is proposed to get the location of terminal blocks. Gaussian pyramid decomposition is used to get the source image and template image samples, which will reduce the matching time and thus fulfill the requirement of real time application. The positioning screws used as mark points can be obtained by binarization, erosion, and dilation, and then the location of them can be worked out by the centre-of-gravity method. Finally, the location and the rotation angle of terminal blocks can be obtained with least square method. Experimental results show that this method is convenient to be operated with high recognition rate and efficiency.
Research of Automobile Tire Vertical Stiffness Optimization Method on the Basis of ADAMS/Car
Authors: Wang Ze Peng , Yu Zhen , Li Ke
Published: July 2013

Because Tire not only impact on the handling stability of vehicle but also impact on the ride comfort, it is more practical significant that tire vertical stiffness parameters on handling stability and ride of vehicle impact is considered synthetically than considering handling stability and ride singly. In this paper, full vehicle model was built on the basis of ADAMS/Car. The vertical stiffness of tire was only changed and other parameters remain unchanged, then full vehicle analysis was carried out to get the simulation curves. The impact of the vertical stiffness of tires on the handling and stability and ride comfort was obtained from the curves of simulation. The tires of optimized vertical stiffness can be obtained from the comparison of simulation results. Analytical results can be conductive to designing and producing the tire.
Research on the Self-Cleaning Sole Cleaner
Authors: Zhang Zhan Guo , Sun Li Xia , Liu Xiao Yong , Li Jian Yong , Lv Xiang Yan
Published: July 2013

The self-cleaning sole cleaner designed in this paper is a kind of cleaning device widely used in large public places. It possesses functions such as washing, wiping, drying and self cleaning, and so can thoroughly clean sole. It is chiefly composed of pressure washing unit and self-cleaning wiping unit. The device washes the sand and mud adhered to sole by the pressure water coming out of the pressure cleaning head at first, and then wipes off the sole sewage by the wiping unit, finally dries sole. Main advantages of the cleaner are concluded to simple structure, good cleaning effect, energy saving, and environmental protection by adopting the technologies of water level automatic keep and sewage dispose.
Effects of Gate Locations on the Tensile Strength of Injection Molded Weld Lines
Authors: Ding Yu Mei , Wang Xiao Hua , Xie Peng Cheng , Zhang You Chen , Yang Wei Min
Published: July 2013

As unfavorable molding defect, weld lines often result in reduced mechanical properties and poor appearance quality of injection molded parts. In this present work, effects of gate locations on the tensile strength of weld lines were investigated by changing the distances between two gates in 10mm, 20mm and 25mm, respectively. Test specimens were prepared with an all-electrical injection molding machine under different process parameters (injection speed, injection pressure and melt temperature). Visualization method and scanning electron microscope (SEM) were employed to further discuss mechanical test results. Study results indicated that tensile strength of injection molded weld lines was lessened as the increase of gate distances. Higher injection speed, higher injection pressure and lower melt temperature induced to lower weldline tensile strength whatever the gate locations were. Study results also illustrated that it was gate location rather than molding conditions had the most decisive influence on the weldline mechanical properties.
Terahertz Time-Domain Spectroscopy Technology and its Application in the Field of Pesticide
Authors: Huang Yi Hu , Hu Man , He Gui Hua , Liu Wen Long
Published: July 2013

Terahertz wave lies between far-infrared and microwave in electromagnetic spectrum with frequency form 0.1 THz to10 THz. Terahertz is believed to be the master technology of electronics and information science, and to be the bridge between micro electronics and macro wavelength. THz has formed a worldwide research climax. This paper introduces the main characters of Terahertz wave, Terahertz time-domain spectroscopy technology and its application researches, especially detailed the researches in pesticide spectra.
The Research Progress on Pressure Drop of Rotating Packed Bed
Authors: Hu De Dong , Zhu Guang Wei , Shan Wen Yan
Published: July 2013

Rotating packed bed is a new high efficient equipment for multiphase flow transference, it has been widely used in chemical separation and preparation of nano-materials. The gas pressure drop of RPB is one of important indicators which are used to measure performance of RPB. In this paper, the experimental and simulative progress of research on the gas pressure drop at home and abroad in recent years is reviewed. All kinds of gas pressure drop experiments and simulations of counter-flow RPB, cross-flow RPB are introduced and compared, followed with the analysis of the progress, existing problems, the trend and emphasis.
Numerical Analysis for Thermal-Chemical-Stress Coupling in Deep Rock Creep Properties
Authors: Wang Yan Chun , Li Yuan , Li Jian Guang
Published: July 2013

The control equations for analyzing coupled thermal chemical-mechanical phenomena of deep rocks are established. Using creep equation by experimental data, 3D numerical simulation for creep properties of deep soft tunnel under coupling effect of temperature field, chemical field and stress field are conducted by ANSYS, and different effects of these fields on deep soft rock tunnel creep properties are analyzed, whats more time-creep curves of different temperature, pH value and stress deviation of the mid-point of the top of tunnel are obtained. Effect of these three fields on creep characteristics of deep soft rock cant be ignored. Under deep complex environment, high-stress is main factor of tunnel creep; creep increasing with temperature increasing. From simulation results, we get whether acidic environment or alkaline environment causes significantly stronger corrosive effect on the rock mass than the neutral environment, and increases its creep.
Finite Element Static Deformation Analysis of the Cylinder
Authors: Yang Fu Qin , Zhang Hong Tao , Chang De Gong , Zong Rong
Published: July 2013

In this paper, finite element static deformation analysis of the cylinder was carried out by Pro/E and ANSYS Workbench software. The deformation contours of the cylinder were obtained. By means of the contours, deep research about deformation distribution condition and the maximum deformation concentration parts of cylinder mechanism were conducted. The research is helpful for the improvement of the structure and the subsequent optimization of cylinder mechanism.
The Preparation of Polypropylene/Polyvinyl Alcohol Ultra-Fine Fibers Using Melt Electrospinning Method
Authors: Li Hao Yi , Ding Yu Mei , Liu Yong , Zhang You Chen , Yang Wei Min
Published: July 2013

Some polymers like polypropylene (PP), polyethylene (PE), polyphenylene sulfide (PPS) are very hard to be solute in conventional solvents at room temperature, and impossible to be solution electrospun, but they can be easily fabricated into ultra-fine fibers using melt electrospinning. In this study, PP/PVA compound ultra-fine fibers were produced using mlet electrospinning. The effect of PVA content in PP/PVA compound on the properities of resultant fibers was studied. Different plasticizers were added into the compound to find the most effective plasticizer reducing the melt viscosity. It was shown that PP/PVA compound with content of 5% PVA can produce the finest fiber while adding 8% hyper-branched polyester (HBP). In addition, the resultant fibers were made into thin paper using compaction processing, and water absorbability was tested. The results were expected to be used in dyeable PP cloth production and degradable polymer paper production.
Flow Analysis of the Die and the Torsional Multiplying Element in Mould Based on ANSYS
Authors: Yuan Cong Ji , Xie Peng Cheng , Zhong Yan , Ding Yu Mei , Zhang You Chen , Yang Wei Min
Published: July 2013

Polymer melt flowing in the multiplying element and matched die was simulated for the flowing uniformity and pressure distribuiton based on ANSYS. The results of simulation revealed that the height difference between outlet and inlet sections of the channels in multiplying element, the length of transition region and forming region of molding die all affected pressure distribution and velocity uniformity at the outlet.
Nitrogen Content Influence on Optical Properties of DC Magnetron Sputtered Copper Nitride Films
Authors: Wang Shu Yong , Yuan Ning Yi , Ding Jian Ning
Published: July 2013

In this paper, influence of nitrogen content on growth mode, surface morphology and the optical properties of copper nitride (CuxN) films was investigated. CuxN films were prepared on glass substrates by direct current (DC) magnetron sputtering at various nitrogen contents. X-ray diffraction (XRD), profilometer, atomic force microscope (AFM) and spectrophotometer were used to analyze the characteristics. The XRD measurements showed the films were composed of Cu and Cu4N crystallites at working pressure with a low nitrogen content, while the structure of the films were conformed to anti-ReO3 structure at a high nitrogen content and the preferred growth orientations of the Cu3N films changed from (111) to (100). The transmittances of CuxN films increased with the increase of nitrogen content (r) in working gas flow from 0 to 0.6, while decreased when r increased from 0.6 to 0.9. Additionally, the lowest reflectivity and the maximum band gap of 1.35 eV for CuxN film were obtained at r = 0.6. The CuxN films deposited at various nitrogen contents have large differences on optical properties which provide a potential application in optical storage devices.
Research on Improving the Measurement Accuracy of Laser Interferometer System
Authors: Wang Xuan Ze , Zhou Hao , Zhai Zhong Sheng
Published: July 2013

In the laser interferometer system based on the four quadrants photoelectric, phase difference between two quadrants photoelectric is the way of identifying the fringe width and rotating angle, in order to achieving the measurement of two-dimensional small angle. Due to the temperature instability of the laser itself, the system installation error, the electronic device noise, and wave-front error etc, interference fringes prone to bending, and the received optical signal contains unequal amplitude and DC offset error, which will have a serious impact on measurement. Therefore, this paper analysis these impact of the wave-front error on the interferometer system and propose improvement measures. New hardware circuit is designed to eliminate the DC offset and the new algorithm based on multiple linear regression models is proposed to achieve the high-precision extraction of phase difference. The experiment results show that the methods reach the angle accuracy 0.1 arc second.
A Low-Distortion Fourth-Order Bandpass Sigma-Delta Modulator Using Double-Sampling Technique
Authors: Xu Hong Lin , Zhou Jia Jun , Yang Jian , Chen Song , Gao Zhi Qiang , Liu Xiao Wei
Published: July 2013

In this paper, a low-distortion fourth-order bandpass sigma-delta (ΣΔ) modulator is proposed based on a switched-capacitor resonator which employs double-sampling technique to relax the requirements for circuits and reduce opamp power consumption and chip area. The modulator is based on the low-distortion low pass ΣΔ modulator. The system level simulation results compare between the low-distortion architecture and the traditional one is given. The full differential circuit applying two-path technique is implemented with TSMC0.18µm CMOS process. It achieves a peak SNR (signal-to-noise ratio) of 85.9dB and DR (dynamic range) of 91dB with 200 kHz bandwidth centered at 20MHz which are better than the conventional bandpass ΣΔ modulator.
Effects of Geometrical Parameters on Performances of Wind Energy Harvester with a Chamber
Authors: He Xue Feng , Fang Yi Fu , Du Zhi Gang
Published: July 2013

To improve the performances under low speed wind, a wind energy harvester similar to harmonicas was proposed. The harvester mainly includes a cuboid chamber and a cantilevered beam. The front wall of the chamber is opened as the air entrance and a rectangular hole is opened on the sidewall as the exit. The cantilever composed of a piezoelectric sheet and a flexible beam was fixed onto the sidewall of the chamber near the exit. Experimental results show that the width and height of the chamber significantly affect critical wind speed and output power, respectively. The initial attack angle of the cantilever has important influence on the critical wind speed. Blunt body at the air entrance could remarkably decrease the critical wind speed. For a prototype with a 60 mm×20 mm×13 mm chamber, the length of the cantilever of 30 mm and the length of the piezoelectric sheet of 8 mm, the measured maximum output power is 1.1 mW under 17 m/s wind.
FEM Simulation of the Thermo-Mechanical Behavior of TSV 3D MEMS Structure
Authors: Gong Xin , Chen Jing , Lee Jong Ho
Published: July 2013

As pitch of TSV shrinks down, mechanical characteristics of TSVs become more complicated and the heat of chip becomes a critical issue. The objective of this paper is to study thermal mechanical characteristics of ultra-fine pitch TSV. The thermal-mechanical characterization of an ultra-fine pitch chip is simulated with FEA.
Microdevice-Based DNA Extraction Method Using Green Reagent
Authors: Chen Xing , Cui Da Fu , Sun Jian Hai , Zhang Lu Lu , Li Hui
Published: July 2013

In this paper, a novel microdevice-based solid phase extraction (SPE) method has been developed to extract genomic DNA from real biological samples, such as whole blood, by using a green reagent NaCl as the new binding salt. Guanidine as a bind salt was widely used for extraction DNA with a high extraction efficiency. But it was proved that guanidine was a kind of polymerase chain reaction (PCR) inhibitors, which is also toxic and the waste of guanidine might contaminate environment. NaCl is a natural, nontoxic, cheap, and green reagent, which would be a perfect candidate to replace guanidine. Silicon - polydimethylsiloxane (PDMS) - glass microdevice with a microchannel was designed and fabricated by micro electromechanical system (MEMS) technology. The DNA adsorption on the surface of the microchannel was observed by scan electron microscopy (SEM) technology. Then both NaCl and guanidine were used as the binding salt to extract genomic DNA from real biological sample. Compared with the binding salt of guanidine, the microdevice-based SPE method using NaCl is able to extract enough genomic DNA from rat whole blood in 30 min. About 725.2-1279.3 ng/mL genomic DNA was successfully extracted from whole blood by using NaCl. This highly efficient, effortless, and green method can be widely used as a lab-on-a-chip component for initial biologic sample preparation.
Design of MEMS Piezoelectric Vector Hydrophone
Authors: Lu Ning , Li Jun Hong , Liu Meng Wei , Wang Cheng Hao
Published: July 2013

This paper presents a novel micro-electromechanical system (MEMS) piezoelectric vector hydrophone based on ZnO thin film. The approximate theory analysis is introduced in sensitivity and resonant frequency, and a simulation on the vector hydrophone is carried out by finite element method (FEM). Results of the theory analysis and FEM simulation agree well. The results show that the ratio of the piezoelectric layer thickness and Si layer thickness exists an optimum value for sensitivity, and MEMS piezoelectric vector hydrophones in smaller size have higher sensitivity than piezoresistive ones and are of passivity.
First-Principle Calculation of the Co Doped Anatase TiO2
Authors: Yan Xin Pei , Yao Lan Fang , Tang Xiong
Published: July 2013

Using first-principle calculations based on density function theory (DFT), the geometry , band structure and electronic density of states of Co-doped anatase titanium dioxide (Co/TiO2) have been studied at plane wave ultra-soft pseudo-potential (PWPP). The states of the valence bands and conduction bands of pure and Co doped TiO2 with anatase structure were calculated. The density of states of pure anataseTiO2 and Co-doped TiO2 is analyzed in detail based on the calculations using the first-principles. From the calculated results, the band gaps of anataseTiO2 and Co doped TiO2 are about 2.15 and 0.78eV, respectively. It shows that Co doped anatase titanium dioxide may lead to the narrowing of the band gap in Co/TiO2. The Co doped anataseTiO2 could be a potential candidate for photocatalyst because it can enhance the photocatalytic activity of anatase TiO2.
Preparation and Characterization of a Micro-Supercapacitor with Three-Dimensional Microelectrode Arrays
Authors: Li Xiang Yu , Wang Xiao Feng , Ma Rui , Lv Wu Shuang , You Zheng
Published: July 2013

With the development of the MEMS technology and the more widely-used micro-systems, micro-power devices are developed for portable consumer electronics.[The MEMS supercapacitor is one of the most important parts for micro-powers. In this paper, a micro-supercapacitor was designed and fabricated with three-dimensional microelectrode arrays configuration. It has been tested by scanning electron microscopy, Cyclic Voltammeter, Galvanostatical charge/discharge curve and electrochemical impedance spectroscopy. These posts were 50 μm in diameter and 100 μm tall; with foot print area of 2×2mm2. The capacitance is 89.52mF/cm2. The biggest feature in this paper is that the two plates of the supercapacitor are both three-dimensional microelectrode arrays which are shown to offer significant advantages.