bluuebunny/crossref_metadata_2025 huggingface dataset:
Computational Research of Internal Temperature Distribution for Liver Tissues under Laser Irradiation
Authors: Xiong Guo Xin , Zhao Hong Ying
Published: July 2013

To study the effect of blood perfusion rate and air convection boundary condition upon heat transfer of liver tissues by establishing heat conduction model of liver tissues under laser irradiation.The analytical solution of the model was solved by homogenizing boundary condition and the numerical solution of the bio-heat transfer model under the two-dimensional cylindrical coordinate was calculated by the Finite Element Method (FEM).The results show that the highest temperature irradiated by laser is on the center point of the surface tissue, and decreases in the radial and axial direction, the temperature in the axial degrades more seriously than that in the radial.This study provides a theoretic bases for laser applications in medicine.
Scheduling Scheme Based on Smart Grid of Energy-Saving
Authors: Zhang Ke
Published: July 2013

The smart grid is an ideal solution of the future electricity system, and scheduling aspects of the smart grid, the nerve center of the most intelligent can best embody the intelligent characteristic, this article summarizes the development of smart grid technologies, energy-saving scheduling, and the smart grid ofsignificance analysis to explore the implementation of energy-saving dispatch to the power industry, an energy efficient scheduling model and highlight the superiority of the energy-saving scheduling in order to ensure the smooth implementation of energy-saving scheduling.
Studies on Pyrolysis Behaviour of Boron-Containing Phenolic Resin/High-Silica Fiberglass Fabric Ceramifying Composites
Authors: Huang Zhi Xiong , Ding Jie , Qin Yan , Pei Yu
Published: July 2013

The boron-containing phenolic resin/high-silica fiberglass fabric ceramifying composites were prepared using muscovite micas loaded boron-containing phenolic resin (BPF) as matrix, high-silica fiberglass fabric as reinforcements. The boron-containing phenolic resin (BPF) reacted with the muscovite to form ceramic residue after thermal pyrolysis under high temperature. X-Ray Diffraction (XRD) analysis of the composites at different temperatures showed the formation of new crystalline phases as a result of reactions between the degradation residue of BPF and the muscovite. Electron probe micro-analyzer (EPMA) was used to explore the changes in microstructure and local micro-chemical composition after samples were pyrolyzed under high temperatures. The ceramic yield of the composites ranged from 84.39% to 75.23% when pyrolyzed 700 to 1300°C in air.
Effect of Expanded Temperature on Microstructure of Carbon Nanotubes/Expanded Graphite Composites
Authors: Zhang Qian , Gao Xin Bao , Li Tian Peng
Published: July 2013

Carbon nanotube/expanded graphite composite material was prepared by expanding the mixture of multi-walled carbon nanotubes and expansible graphite under the condition of high temperature. The microstructure and composition was studied by using SEM and XRD. The study shows that the tubular structure of carbon nanotubes in the composite material is changed by high temperature expanding process, and the microstructure is different with different expanding temperature. When the expanding temperature was 900°C, carbon nanotubes transformed, then attached to the surface of expanded graphite flake, so carbon nanotubes and expanding graphite combined strongly; globular carbon nanotubes attached to the surface of expanded graphite flake at the temperature of 700°C, both were combined much more strongly; carbon nanotubes retained the tube structure at the temperature of 500°C, combination was looser due to the simple physical adsorption. The result shows that the choice of expanding temperature has an important effect on microstructure of carbon nanotube/expanded graphite composite material.
Simultaneous Determination of L-Ascorbic Acid and L-Ascorbylpalmitate Using RP-HPLC Method
Authors: Tian Ye Lin , Wang Jun Kai , Leng Ping Sheng , Liu Yun
Published: July 2013

A rapid reversed phase highperformance liquid chromatography (RP-HPLC) method was developed for the simultaneous analysis of L-ascorbic acid and L-ascorbylpalmitate (AP). The chromatography was performed on a SSI model 2300-525 high performance liquid chromatographequipped with anAlltechApollo C18 column at 30 oC.The mobile phase was acetonitrile-water (90:10,v/v) with the flow rate of 1.0 mL/min. UV detection wavelength was 250 nm. This method permits the simultaneous determination of ascorbic acid and AP in the synthesis of AP transesterified with methyl palmitate and ascorbic acid. The detection limit of ascorbic acid and AP was 0.07μg/mL and 0.12μg/mL, respectively. The recovery was 90.59 ± 3.04% for ascorbic acid and 101.3 ± 4.81% for AP. The linearity range for ascorbic acid and AP was in the range of 0.1 - 0.7 mg/mL and 0.4 - 4.0 mg/mL, respectively. Correlation coefficients (R2) were 0.9910 for ascorbic acid and 0.9986 for AP. The proposed method could be used for routine quality control of AP synthesis with methyl palmitate and ascorbic acidby enzymatic transesterification.
Study of the Parameters Dispersion Effect in Photovoltaic Systems, in Terms of the Coveragetype
Authors: Santoyo Héctor Hugo Rodríguez , Arenas Francisco Javier Ramírez , Flores Josémartin Medina , Camacho Beatriz Ruiz
Published: July 2013

In this work, was considered the thesis that the optic properties of anti-reflecting and the satin-like glasses can improve the efficiency of solar panels that use plastic covertures or conventional glasses as coverage. The infrared radiation that is not turned into electricity with the conventional photovoltaic cells, increments the panel surface temperature, of the supporting structure and of the photovoltaic cells. For above 35oC it is possible that some cells stop converting the visible light in electricity due toparameters dispersion effect, with this, the efficiency of electric generation is diminished. In the electromagnetic spectrum, the wavelength of infrared radiation is since 800nm, the anti-reflecting glasses transmittance is since430 to 680 nm, while the satin-like glassestransmittance issince 500 to 600nm, therefore for thiscause the infrared transmittance is not observed. In this work, it was proved that the use of anti-reflecting glasses and satin-like glasses improves the conventional solar panels efficiency. The results suggest an efficiency of 31.6 % of solar energy conversion with the anti-reflecting glass, and 36% with the satin-like glass, when these were used as cover panel photovoltaic.
A Multi-Agent Supply Chain Recommendation and Negotiation Framework
Authors: Alireza Jahani , Masrah Azrifah Azmi Murad , Nasir Sulaiman , Hasan Selamat
Published: July 2013

Supply Chain is a network of organizations and their associated activities that work together to create value for the customer. This paper aims to present comprehensive and systematic negotiation and recommendation framework for e-Supply Chain by using multi-agent approach. Such framework should receive suppliers material offers, rank the suppliers, and provide recommendations for customers. On behalf of the standard tasks like interface, recommendation, negotiation, and data retrieval, some agents have designed to use neural network for supplier ranking and classification for data filtering to reduce the information overload and enhance the negotiation ability of the agents. Besides, it would customize the information for users based on their interests.
Composite Joints Design - Migrating from Finite Element Models to Component Models
Authors: Jong Wan Hu , Ji Woong Park
Published: July 2013

When developing innovative structural systems, designers are faced with a difficult problem when addressing connection design. While the provisions for the design of members and their failure modes are well understood and codified, the design and performance of the connections are not. Current specifications require designers to provide evidence, through either experiments or analysis and combinations thereof, that these connections will perform as intended. In this paper, the design of an innovative type of connection to concrete-filled tube columns is described. These connection are partially-restrained, contain a new type of material (shape memory alloys), and are geared for high seismic loads making their design a very challenging proposition without the aid of physical testing. The design is developed based on detailed finite element analyses of the connection region and elements which lead to simplified spring models suitable for design of entire frames. The results indicate that through careful and rigorous analyses, robust simplified connection models can be developed even for complex connections.
Radiolytic Synthesis of Pt-M@MWNT Catalysts (M=Ru, Sn, and Au) for Biosensors
Authors: Kwen Hai Doo , Choi Seong Ho
Published: July 2013

Non-enzymatic biosensors employing multi-walled carbon nanotube (MWNT) with highly dispersed Pt-M (M = Ru, Sn, and Au) nanoparticles (Pt-M@MWNT catalysts) were fabricated by radiolytic deposition. The Pt-M nanoparticles on the MWNTs were characterized by transmittance electron microscopy, elemental analysis, and X-ray diffraction. They were found to be well-dispersed and to exhibit alloy properties on the MWNT support. Electrochemical testing showed that these non-enzymatic biosensors had larger currents (mA) than that of a bare glassy carbon (GC) electrode and one modified with MWNTs. The sensitivity (μA mM-1), linear range (mM), and detection limit (mM) (S/N = 3) of the glucose biosensor with the Pt-Ru, Pt-Sn and Pt-Au catalysts in PBS electrolyte were determined, respectively. The experimental results show that such biosensors can be applied to glucose detection in food chemistry field.
Research Progress on Water-Using System Integration Methods
Authors: Pan Chun Hui , Zhao Zhi Yue , Wang Huan Yun , Dong Cui Fang
Published: July 2013

This paper introduces the research content, methods and progress of integrating the water distribution network, and has done a comprehensive overview from basic concepts to several typical methods for designing water-using networks such as water pinch analysis, mathematical programming, internal water main technique and experience-based design methodology. It has an advance view of the future developments direction as well.
Microstructure Analysis of Post Weld Aging in Duplex Stainless Steel Welds
Authors: Nansa-Arng Santirat , Peasura Prachya
Published: July 2013

Duplex stainless steel (DSS) offers an alternative to the austenitic stainless steels especially at temperatures between –50 and 300°C and is suitable for structural applications. The research was study the effect of post weld aging (PWA) parameters on microstructure in heat affected zone. The specimen was duplex stainless steel (DSS) UNS31803 which thickness of 10 mm. The PWA sample were tested the microstructure and phase analysis. The factors used in this study were PWA temperature of 650, 750, and 850๐C with PWA time of 1, 2, 4 and 8 hours. The welded specimens were tested by microstructure and phase analysis testing according to ASTM E3-11 code. The result showed that both of PWA temperature and PWA time can greatly affect microstructure and phase analysis in heat affected zone (HAZ). The ferrite that was austenite with a grain and an austenite scattered throughout. The microstructures of PWA 650 °C with PWA 1, 2, 4 and 8 hours in ferrite phase which ferrite phase was not different. The widmanstätten structures were observed high PWA temperatures were also distributed at grain. At high PWA temperature, ferrite at the grain boundary tended to decrease. Moreover excessive aging temperature can result in increasing austenite intensity and size in parent phase. Definitely, at high PWA temperature and time, over-aging of HAZ resulted in corrosion resistance reduce.
Experimental Studies on Transfer Beam Supported Frame Equipped with Fiber Reinforced Plastics Bars
Authors: Chen Jin , Jiang Shi Yong , Lin Zhi Kun , Li Ying Tao , Zeng Xiang Rong , Wang Wei , Zheng San Nian
Published: July 2013

Through pseudo static test on three pieces of fiber reinforced plastics (FRP) transfer beam supported frame with three different reinforcement form, reinforcement ratio and the number of root reinforcement ,which are subjected to the vertical load and horizontal low cycle reciprocating load, the specimen fracture development law, yield mechanism, failure pattern, and bearing capacity, ductility, hysteresis characteristics and seismic performance are analyzed. The test results show that: yield mechanism and failure pattern of transfer beam supported frame equipped with fiber reinforced plastics reinforced bars are reasonable. The bearing capacity and deformation performance of transfer beam supported frame with top and bottom longitudinal bar replaced by FRP bars and symmetrical reinforced box are better than that of single upper replacement for FRP and lower replacement for FRP. The ductility performance of transfer beam supported frame equipped with fiber reinforced plastics bars is good, hysteresis curve is full, and have good seismic performance.
Methods Development for Realization of Local Vibration
Authors: Kang Seok Hoon
Published: July 2013

Due to the rapid development of mobile devices, the interface requirements are more diverse, and the vibration is one of them. In this paper, implementation of local vibration on mobile devices, we propose how to implement the spatial vibration. The method being proposed tries to implement the local vibration by delivering the vibration of the vibrator to the user effectually. The local vibration was implemented through the vibration transfer ability reduction between arrangement of the vibrator and mobile apparatus and vibrator.
Research and Implementation of Vehicle-Logo Recognition Based on Modified Invariant Moments
Authors: Huang Min , Yang Guo Feng , Ma Ya Qiong , Wang Yan Ming
Published: July 2013

According to the low recognition rate of Hu invariant moments in the target images, this article proposes a vehicle-logo recognition research algorithm based on the modified invariant moments. At first, use the template matching to locate the vehicle-logo rough area and use the edge detection for accurate location. Then, calculate the characteristic value of the modified invariant moments of the vehicle-logo, finally, the vehicle-logo is recognized according to the minimum distance of invariant moments. The experimental results show that the modified invariant moments can improve the recognition rate of target images effectively.
Quantitative Models for Computing Distance and Directions: A Raster-Based Approach
Authors: Sha Zong Yao
Published: July 2013

Modeling Distance and Direction Relationships (DDR) is a key issue in spatial analysis and spatial reasoning. Various fields such as geology, hydrology, ecology, etc. apply DDR models to help digging out valuable patterns hidden in geoscientific dataset. This paper proposed two quantitative models through a raster-based approach for computing Euclidean distance and cardinal direction relationships, respectively, between a pair of spatial objects in a two-dimensional geographical space. The corresponding algorithms were designed and implemented. This new raster-based modeling can work universally on all types of spatial objects (point, line, polygon, or compound objects) and quantify DDR more accurately due to its sensitivity to object shapes. The usefulness of the modeling was demonstrated by various applications.
Active Visual Sensor Based Weld Seam Tracking for Underwater Wet Welding
Authors: Chen Bo , Jia Chuan Bao , Feng Ji Cai
Published: July 2013

Weld automation is the development trend of underwater welding, and underwater weld seam tracking is one of the key technologies in weld automation. This paper used active visual sensor to automatically monitor the weld seam in underwater wet weld process, and image processing algorithms were developed to automatically obtain the weld torch deviation, then the weld torch was adjusted automatically according to the deviation obtained by the image, experiment results showed that this method could be used in underwater wet welding.
Developing a Cause and Effect Model of ISSM and TAM in Ecotourism Virtual Communities by Applying DEMATEL Method
Authors: Chuang Huan Ming , Lin Chien Ku , Chen You Shyang
Published: July 2013

Ecological degradation is an escalating global threat. Despite these environmental concerns, efforts to raise environmental behavior appear unsuccessful as degradation of the environment continues. Thus, the environmental protection problems are highlighted and the environmental issues are emerged. Given to the above reasons, an appropriate information technology tool, such as the growing popular social network system (e.g., virtual community, VC), can facilitate public education and engagement on applications of the existed problems effectively. Particularly, exploring the related involvement behavior of VC member engagement becomes an interesting and meaningful topic. Nevertheless, the member engagement process comprises interrelated sub-process reflecting members interactive experience within virtual communities, and value co-creation model among community participants. To address the top-focused ecotourism virtual communities, this study presents an application of using hybrid expert-based DEMATEL models based on multi-criteria decision making (MCDM) tools to deeply investigate the complex multidimensional and dynamic nature of member engagement. Research findings can help providing insightful management implications and suggestions on the viral marketing of ecotourism protection concerns to both practitioners and academicians.
Design and Implementation of Collaborative Editing System Based on Web
Authors: Wang Xing Xing , Pan Jing Chang , Zhang Xia Xu
Published: July 2013

Collaborative editing is a very important part of Computer Supported Cooperative Work (CSCW). Nowadays, there are endless stream of relevant systems coming out, but most of which have certain limitations in practice and generality. This paper proposes a simple collaborative document editing system solution, introducing system design and technical implementation of the module in detail. By using CKEditor as a core module, a Web-based collaborative editing subsystem is designed and implemented. And this system has been integrated LAMOST Astronomical Spectrum Analysis Cyberlab (LASAC) as a subsystem and proved to be successful.
Malicious Information Jamming Algorithms of Content Attack
Authors: Yang Chang , Zhou Xue Guang , Sun Yan
Published: July 2013

To find malicious information jamming countermeasures and techniques of content attack, the paper proposed two malicious jamming algorithms, including the Blind Jamming Algorithm and the Precise Jamming Algorithm. Experiments, conducted on 3,183 texts with the Chinese Lexical Analysis System (ICTCLAS) shows the effectiveness of Blind Jamming Algorithm, making the accuracy rate of Chinese word segmentation from 94% dropped to 43%. Besides, topic classification experiments show that the Blind Jamming Algorithm could affect the topic classification significant. Further experiments on 5,999 texts with the semantic orientation analyzer (Sentifier) shows that the Sentifiers average precision is declined from 77% to 60% by jamming, which shows the jamming effectiveness of the two algorithms we have proposed.
Personalized Mobile Catering Recommender System Based on Context Ontology Model and Rule Inference
Authors: Ai Dan Xiang , Zuo Hui , Yang Jun
Published: July 2013

With the development of smart mobile terminals and pervasive computing, mobile recommender systems are proposed to realize context-aware personalized recommendation services. A context model plays a key role in a mobile recommender. We discussed the context ontology modeling approach specific for mobile recommendation, and developed a two-level context model including a upper ontology and a domain ontology. We also designed a personalized mobile catering recommender system based on the context ontology model and rule inference. The framework of the system is depicted. And the process of rule generation and rule inference based on the context ontologies is demonstrated.
Zero Based Research on Text Watermark Algorithm
Authors: Wang Qing Jun , Wang Shou Jin
Published: July 2013

Previously there was algorithm shortage about making watermark hidden in semantic meaning of text and text formatting, this paper presents a new zero-watermark algorithm based on English text and the algorithm is suitable for Chinese text as well. Firstly, the algorithm determines the textual characteristics through the punctuation mark of texts. Then add the watermark information into the host through coring the information between cryptographic watermark and textual characteristics. The algorithm has a good concealment and strong robustness.
Study on the Structure of Program Management Information System
Authors: Feng Jing Chun , Dong Zhi Sheng , Zhuo De Hua
Published: July 2013

On the basis of analyzing and researching the managemant process and organizational supporting structure of Program management, this article analyzed the information flow and information planning of Program management according to input information and output information of each management process of Program management. Then on the basis of analyzing various function requirements of Program management information system for each management subject, design the function and structure system of Program management information system, to construct a basic model of Program management information system.
Photocatalytic Activity of Fe/Ti Mixed Oxide for Degrading Humic Acid in Water
Authors: Kim I.H. , Kim W.S. , Rhee D.S.
Published: July 2013

The comparative experiments for removing humic acid as environmental pollutant were conducted by adsorption on iron oxide, photooxidation in the presence of titanium dioxide catalyst and combined adsorption-photooxidation by iron-titanium mixed metal oxides, where all these active components were immobilized on polypropylene granules. The main purpose of the work was the combination of adsorption and photocatalytic oxidation processes to remove humic acid. The granules with iron-titanium mixed oxide for treating humic acid gave much better results with 1.2~3 times higher removal rates comparing to the other two single coated oxides at certain pH values. And the order of removal efficiency according to pH was the same as for single iron oxide-coated granules. The ratio 1:2 of iron oxide/titanium dioxide was found optimal for maximal decolorization of humic acid solution. The total organic carbon decrease of humic acid in each experiments, when it was pre-equilibrated with mixed oxides-coated granules in the dark for 30 min and without pre-equilibration, was very similar. The results suggested that the mechanism of humic acid removal may be not only a respectively combined adsorption and photooxidation by iron oxide and titanium oxides, but an enhanced photooxidation reaction as a result of concentrating humic acid on titanium oxide surface by iron oxide.
Multiple Crack Propagation with Dual Boundary Element Method in Stiffened and Reinforced Full Scale Aeronautic Panels
Authors: Citarella Roberto G. , Cricrì G. , Armentani E.
Published: July 2013

In this work, the performance of a new methodology, based on the Dual Boundary Element Method (DBEM) and applied to reinforced cracked aeronautic panels, is assessed. Such procedure is mainly based on two-dimensional stress analyses, whereas the three-dimensional modelling, always implemented in conjunction with the sub-modelling approach, is limited to those situations in which the so-called secondary bending effects cannot be neglected. The connection between the different layers (patches and main panel) is realised by rivets: a peculiar original arrangement of the rivet configuration in the two-dimensional DBEM model allows to take into account the real in-plane panel stiffness and the transversal rivet stiffness, even with a two dimensional approach. Different in plane loading configurations are considered, depending on the presence of a biaxial or uniaxial remote load. The nonlinear hole/rivet contact, is simulated by gap elements when needed. The most stressed skin holes are highlighted, and the effect of through the thickness cracks, initiated from the aforementioned holes, is analysed in terms of stress redistribution, SIF evaluation and crack propagation. The two-dimensional approximation for such kind of problems is generally not detrimental to the accuracy level, due the low thickness of involved panels, and is particularly efficient for studying varying reinforcement configurations, where reduced run times and a lean pre-processing phase are prerequisites.The accuracy of the proposed approach is assessed by comparison with Finite Element Method (FEM) results and experimental tests available in literature.This approach aims at providing a general purpose prediction tool useful to improve the understanding of the fatigue resistance of aeronautic panels.KEYWORDSDBEM, full scale aeronautic panel, 2D/3D crack growth, MSD, doubler-skin assembly, damage tolerance
Multiscale Fracture in Peeling of Highly Oriented Pyrolytic Graphite
Authors: Yang Bo , Vijayanand N.
Published: July 2013

Micromechanical cleavage is one of the methods used for isolation of single-and few-layer graphene sheets from bulk graphite. On the surface of peeled graphite flakes, nanosteps of precisely multiple-layer thickness are often observed. The nanosteps are believed to be termination edge of graphene sheets and formed by tearing graphene sheets sandwiched in the mouth of a main cleavage crack during the peeling process. In the present work, we introduce a continuum model to examine the peeling process that involves multiple fractures: the main cleavage fracture at the microscale, delamination of a graphene sheet from bulk graphite at the nanoscale, and tearing fracture of graphene at the atomistic scale. We apply von Karman's plate theory to model the graphene layer, the elastic fracture mechanics for the microscale cleavage crack, and a cohesive zone model for the nanoscale interlayer delamination and for the lattice-scale tearing fracture as well. With a reliable empirical interlayer potential, we could reveal the characteristic length scales involved in the multiscale fracture process. We show that the graphene layer is locally stretched to fracture in mode-I when von Karman's finite deflection effect in a plate is invoked, although the loading by the sandwiching cleavage crack faces is nominally tearing in mode-III.
Dual BEM Formulation Applied to Analysis of Multiple Crack Propagation
Authors: Oliveira H.L. , Leonel Edson Denner
Published: July 2013

The boundary element method (BEM) is used in this paper for modelling multiple crack propagation in two-dimensional domains. The formulation adopted is based on the dual BEM, in which singular and hyper-singular integral equations are used. An iterative scheme is proposed in order to predict the crack growth path and the crack length increment at each load step. This scheme is accurate enough to simulate localisation and coalescence phenomena, which is the main contribution of this paper. The displacement correlation technique is used to evaluate the stress intensity factors and the theory of maximum circumferential stress is adopted to determine the crack propagation angle and the equivalent stress intensity factor. One application is presented in order to illustrate the robustness and applicability of the proposed model.
Thermal Conductivities and Mechanical Properties of EPDM Filled with Modified Carbon Nanotubes
Authors: Ma Lian Xiang , Ma Lin , He Yan
Published: July 2013

In this article, in order to improve the thermal conductivities and mechanical properties of EPDM filled with carbon nanotubes, phenol formaldehyde resin is used to coat to the surface of carbon nanotubes so as to improve the dispersion in rubber matrix and the combination with EPDM. The results show that with the ratio of CNTs and PF increased, the thermal conductivities of carbon nanotubes/EPDM composites show upward trend. Besides, with the increase of filler content, thermal conductivities of composites are improved as well. However, the mechanical properties of composites are declined. Therefore, more effective methods of modification of carbon nanotubes should be attempted, and more experiments should be conducted to improve mechanical properties of filled EPDM and ensure the high thermal conductivities at the same time.
Forming Process of Segment-Narrow-Bars on the PCR Mold
Authors: Hu Hai Ming , Yin De Bao , Li Hui
Published: July 2013

The narrow bars on tire mold segment are used for molding the sipes on the tread, Its size is small.Its shape and location is diverse and process is complex. This article, through processing feasibility analysis of the narrow bars, combined with production practice, conducted a systematic and detailed explanations on the process of molding the narrow bars in the precision casting method for molding segment.Through analyse a number of empirical conclusions about narrow bars’ forming process which have drawn, and has proved the practicality of these methods through practice.
Finite Element Analysis for Mechanical Properties of a New Section Contour Tire
Authors: Jiao Zhi Wei , Zhao Peng , Liu Yue Xing , Zhang You Chen , Yang Wei Min
Published: July 2013

A 3D triangle balance contour tire model was established by using ABAQUS software as a platform. During the calculation of the model, static loading process and cornering loading process were taken into account, and the mises pressure and contact pressure distribution and the transverse stiffness performance curve of the tire were obtained. The analysis results were compared with that of the existing design. The results of the triangle balance contour tire were beneficial to optimize the structure of tire and could provide reasonable basis for predicting the performance of tire.
The Design of Special Spatial Cam Mechanism for Extruder
Authors: Meng Z.M. , Ji L.X. , Ren C.
Published: July 2013

According to the engineering requirement of extruder, a new spatial worm cam drive and its corresponding design method due to mechanism’s special use requires were introduced .In this paper, the worm cam’s axes and the index plate’s axes were vertical. It is the main purpose that the index plate with pin rotated without lash, while the worm cam rotated with the same speed in a certain speed. When the transmission ratio was i, the follower rotated by an angle in different speed intermittently without impact as the driving part made one rotation in the same speed. In this paper, non-impact is in the condition which the driven work in the principle of sinusoidal acceleration and the worm cam’s design equation will be provided.
Simulation Study for the Effects of Rotational Speed on Performance of Full Metal Single Screw Pump
Authors: Wu Jun Fei , Lan Jun Bin , Meng Fan Guo , Zhang Xu Ping , Yu Ying
Published: July 2013

Rotational speed is one of the important parameters that impact lifting capacity of full-metal single screw pump .Firstly using the finite volume method to establish a full-metal single screw pump 3D model, secondly using FLUENT software to calculate outlet pressure changes with different series of rotational speed value of the pump in condition of the same inlet pressure .Lastly drawing outlet pressure change curves to evaluate the concrete effect of rotational speed on the performance of the pump. The results indicate that the lifting capacity of the pump and pressure bearing capacity of single stage increase with the rotational speed increasing. The centrifugal performance of the full metal single screw pump is more obvious. So it needs to give full consideration to the effect of rotational speed on characteristics of screw pump in the process of screw pump designing and using, especially the selection of pump series and rotational speed .Increasing the rotational speed of the screw pump can not only reduce the pump series and the structural size, but also can reduce the load torque, improve the reliability of drive system.Now,most of traditional rubber stator is cast one layer rubber that is of double helix surface in the metal enclosure, which can be used together with the metal rotor whose outer surface is plated by hard chrome, while working, the stator can be easily damaged because of the swelling, temperature expansion, and easy to aging of the rubber. As the stator is connected with the tubing, while the stator is damaged and we need to replace a new one, we should disassemble both the poles and string, and it leads to a high cost and the stator can not be used any more, which is apparently a great waste of resource. Besides, that the rubber in the inner surface is hard to clear is also one reason leading to the useless of the stator[1]. Full-metal single screw pump can avoid these shortcomings for its stator and rotor are made of metal materials and they take way of clearance fit. This can ensure the screw pump develops the higher working efficiency in normal operation. However the full-metal single screw pump developed quite late, its theoretical study and basic theory is less and not mature[2]. Rotational speed is the main parameter in the designing and using of full metal screw pump ,so in order to help improve the screw pump performance and for further study of the basic theory of metal screw pump, this paper will focus on the study of effect of rotational speed on the pump performance .
Precision Parts Cleaning Equipment Using Supercritical Carbon Dioxide and Ultrasonic
Authors: Hu De Dong , Ning Zhao Kuan , Han Bin , Zhang He , Gao Gong Ru
Published: July 2013

Conventional cleaning technology and equipments could hardly satisfy effective cleaning of slit micropores from the precision parts, but using supercritical carbon dioxide(SCCO2) and ultrasonic cleaning technology with would solve this problem. SCCO2 have characteristics of low surface tension, fast moving, high dissolubility, strong diffusivity, no chemical additives and recyclable use. The precision parts would widely use this cleaning technology. In the article the precision parts cleaning equipment using SCCO2 and ultrasonic is proposed, and the equipment could use supercritical cleanout and ultrasonic oscillation together, and could rotate the parts, increase the quantity of the parts, improve the cleaning effect, it is an absolutely necessary to guarantee the cleaning effect of precision parts.
Application Research of Pipe Racking System Based on Improved Fuzzy Neural Network PID Control
Authors: Song Jian Hua , Cai Da Wei , Zhu Xing Dong
Published: July 2013

According to pipe racking system exist nonlinear characteristics and in order to get smooth velocity of the racking in moving process. This paper structures a new kind of fuzzy neural network PID which identifies the target model and also provides a non-linear relation model for dynamic programming. In addition, by adopting robust feedback controller, the stability of the closed-loop system and satisfactory control results in initial stage of fuzzy neural network learning are also guaranteed. And we analyze the error response curve of sine signal tracking, the experimental results show that the improved fuzzy neural network PID controller has a higher control performance. The control method has fast response speed, less overshoot and error, strong robust and can meet the requirements of the nonlinear system.
Experimental Study on the Mechanical Properties of Two Sandwich Structure Composite Materials
Authors: Wang Chuan Sheng , Liu Qing Kun
Published: July 2013

According to the relevant national standards, this paper produced Corecell ™ G foam sandwich structure and Nomex honeycomb sandwich structure composite materials specimens. These two materials were carried out tensile, compression, bending and shear experiment. Analyzing and comparing the pros and cons of the two materials in the mechanical properties of tensile strength, compressive strength, shear strength, flexural strength.
Simulation of Circular Tubes Fitted with V Cut and Square Cut Rotors
Authors: Jiang Peng , Yan Hua , Zhang Zhen , Ding Yu Mei , Yang Wei Min
Published: July 2013

This work presents the effect of V cut and square cut rotors in circular tubes for turbulent heat transfer using computational fluid dynamics (CFD) modeling. The computational results are in good agreement with experimental data. The obtained results reveal that the use of square cut rotors leads to higher Nusselt number than use of V cut rotors. The results also show that the heat transfer rate, friction factor and thermal performance factor of rotors with square cut increase with the increase of width (a) and depth (b) of rotors’ cut. Square cut rotors with a=b=3 yields higher mean thermal performance factor than those with other width and depth, a=b=1, 2 and the highest thermal performance factor of square cut rotors at a=b=1, 2, 3 are found to be 2.08, 2.11 and 2.13.
A MEMS Piezoelectric Cantilever Beam Array for Vibration Energy Harvesting
Authors: Zhao Xing Qiang , Wen Zhi Yu , Deng Li Cheng , Luo Guo Xi , Shang Zheng Guo , Li Dong Ling
Published: July 2013

A micro piezoelectric cantilever beam array is designed for vibration energy harvesting. A single degree of freedom analytical model is developed to predict the properties of the device and is verified by finite element method. The piezoelectric material Aluminum Nitride was chosen for the compatibility with the CMOS process. The devices consisting of 5 piezoelectric cantilever beams and one proof mass were fabricated using micromachining technology. The resonance frequency, voltage and power were tested at excitation acceleration of 5.0 g. The maximum output power of the device is 9.13 μW at the resonance frequency of 1315 Hz when piezoelectric beams are connected in parallel.
The Electric Field Analysis of Interdigitated Electrode-Array Based on Semi-Analytical Method
Authors: Tan Jing , Fang Zhen , Liu Yong Hong , Zhao Zhan
Published: July 2013

Dielectrophoresis (DEP) is the action of polarizable particles in non-uniform electric field, which depends on the structure of electrode. In this paper, we present a semi-analytical method, on which the electric field distribution by interdigitated electrode-array with battlement structure is considered. According to the congregational conformation of latex micro-beads which subject to the negative dielectrophoresis movement, the potential-trap by interdigitated electrodes is observed experimentally. The result shows that the theoretical simulation result conforms to actual electric field distribution well. It is proved that semi-analytical method exerts power for the research of dielectrophoresis effectively.
Aerosol Jet Printing on Radio Frequency IDentification Tag Applications
Authors: Xu Bu Lei , Zhao Yang , Yu Ling Ke , Xu Bing , Zhang Hao Er , Lv Wen Long , Sun Dao Heng
Published: July 2013

Radio Frequency Identification (RFID) tag is one of the Automatic Identification technology, its application has been involved in all aspects of daily life. A new micro manufacturing technology called Aerosol Jet® printing is described to fabricate the RFID tag in this paper. The fabrication method of Aerosol Jet printing RFID tag is that print the line using sliver ink as the seed first, and then electroplate copper to increase the line width and thickness to reduce the resistance, thus it would get the higher quality factor Q. The width of seed lines printed is 60 μm with the tip of 250 μm in diameter. The inductance value of RFID tag printed is in the range of 2.87 μH to 2.97 μH, it meets the required value of 2 μH to 6 μH.
Mineral Characteristics Analysis of PM2.5 in Northern China
Authors: Liu Li Zhu , Dong Fa Qin , He Xiao Chun , Dai Qun Wei , Huang Yun Bi
Published: July 2013

PM2.5 (sandstorm-related) was sampled at four sites near dust source areas in Northern China in spring 2012. Every site was away from obvious pollution source. After drying 24 hours in a dry dish, X-ray diffraction (XRD), x-ray fluorescence (XRF) and scanning electron microscope (SEM) of all the samples were examined. The main phases were quartz, albite, calcite and mica. SEM observations showed that the particles were mainly irregular shaped, but different sample the particle morphology is slightly different. And the surface was rough because of erosion mark or pores on them. The chemical composition of PM2.5 is characteristic of high SiO2 and CaO, while low K2O, Na2O. Main elements of the samples were Si, Al, Fe, Ca, which were familiar with crust elements and dust fall components [, but some samples also contained low-level heavy metals like As and Pb.
Immune PI Controller on Magnetic Levitating Ultra Precision Stage
Authors: Liu Xue Peng , Hao Xiao Hong , Zhang Dong Sheng , Wang Bin
Published: July 2013

MLUPS functions without contact or friction. With the large current power, mcu control core, laser interferometer position feedback, the stage meets the precision requirements hardware. The positioning system includes two-level positioning system—one-phase coarse positioning and two-phase fine positioning. Based on mathematical model, the immune PI controller is proposed in terms of magnetic edge effect, current harmonic and nonlinear characteristics of magnetic field. By designing target function, antigen affinity, antibodies affinity, mutation, immune algorithm optimizes parameters and memory cells. The stage working range is 10mm, the simulation result shows that the positioning precision is ±10 nm; the positioning time is 50 ms. The stage has a good performance in robustness
A Single FBAR-Based Temperature and Pressure Sensors
Authors: He X.L. , Garcia-Gancedo L. , Jin P.C. , Zhou J. , Flewitt A.J. , Milne W.I. , Luo J.K.
Published: July 2013

A novel temperature and pressure sensor based on a single film bulk acoustic resonator (FBAR) is designed. This FBAR support two resonant modes, which response opposite to the change of temperature. By sealed the back cavity of a back-trench membrane type FBAR with silicon wafer, an on-chip single FBAR sensor suitable for measuring temperature and pressure simultaneously is proposed. For unsealed device, the experimental results show that the first resonant mode has a temperature coefficient of frequency (TCF) of 69.5ppm/K, and the TCF of the second mode is -8.1ppm/K. After sealed the back trench, it can be used as a pressure sensor, the pressure coefficient of frequency (PCF) for the two resonant mode is -17.4ppm/kPa and -6.1 ppm/kPa respectively, both of them being more sensitive than other existing pressure sensors.
Influence of the Excitations and Detection Positions on the Sensitivity of Magnetoelastic Biosensors
Authors: Wei Xiu Juan , Sang Sheng Bo , Zhang Wen Dong , Cheng Peng , Cheng Chao Qun , Li Peng Wei , Hu Jie , Li Gang
Published: July 2013

Based on magnetoelastic biosensor for the heavy ion detection, this paper is committed to study the influence of the excitations and detection positions on the sensitivity of magnetoelastic biosensors. The frequency response of biosensors with different excitations and different detection positions were studied. The numerical simulation software ANSYS [TM] Ansoft Maxwell was applied to calculate the distribution of magnetic field around the coil. The optimal excitation value was determined by this simulation. The frequency test of the magnetoelastic sensor was analyzed by a network analyzer, which showed the frequency in the middle of coil is better than in the two ends.
Design of a MEMS Resonant Wind Sensor on Airplane Wing
Authors: Si Chao Wei , Han Guo Wei , Ning Jin , Zhong Wei Wei , Yang Fu Hua
Published: July 2013

A new kind of wind sensor made up of MEMS resonators is designed in the paper capable of sensing the lift, the resistance and the turbulence of airplane wings by mounting on the surface. The designed wind sensor is made up of four MEMS wind pressure gauges fixed around a square wind resistance block which used to block the wind to change the wind pressure on the surface, and the change of wind pressure is detected by MEMS wind pressure gauges to reveal the air condition on the surface of the airplane wings. As known, a MEMS resonator is a second-order resonant system whose damping factor is mainly dependent on the air pressure, and the characteristic is often used to detecting the airtightness of a sealed chamber for the damping factor is sensitive under high vacuum, while a MEMS resonator with the damping factor sensitive at atmospheric pressure is designed in this paper for sensing wind pressure change, and the MEMS resonator is manufactured on SOI substrates with deep reactive ion etching technology. Also relations between the wind pressure change and the wind speed around a block at atmosphere is revealed by finite element simulation. Compared to traditional wind sensors such as anemometers and Venturi tubes, the designed MEMS wind sensor with a very small size is suitable to mount on different zones of a wing with a large amount to monitor the air condition and have less influence on air flow.
Electrochemical Characteristics of Aptasensor Based on MEMS Thin-Film Gold Electrode
Authors: Yan Yan Xia , Jiang Li Ying , Wang Fen Fen , Zhang Yan , Hu Jie
Published: July 2013

A new fabrication methods of thin-film gold electrode is reported. Electrochemical characteristics of self-assembly aptasensor based on MEMS thin-film gold electrode has been studied by lots of experiments, characteristics include immobilizing time, AC impedance, CV curves. Experiments indicate immobilizing time of DNA-SH on gold electrode is more than 15 hours. CV curves and AC impedance of MEMS thin-film gold electrode show the same conclusion that 20μm/L DNA is optimum concentration when DNA is immobilized on gold electrode. Those results present a potential universal method for other aptasensors.
Simulation Research of the Long-Base Silicon Magnetic Sensitive Diode Negative-Resistance Characteristics on the Base of ATLAS
Authors: Zhao Xiao Feng , Li Lei , Wang Ping , Wen Dian Zhong , Li Gang
Published: July 2013

According to the experimental results of the long-base silicon magnetic sensitive diode, this paper adopted ATLAS software to establish the two dimensional simulation model in order to research the negative resistance characteristics of the long-base silicon magnetic sensitive diode. Deep impurities were introduced into the long base to study the effect of the concentration and the distribution of deep impurities on the current-voltage characteristics of the long-base silicon magnetic sensitive diode. The simulation results showed that the deep impurity in the long base was the main factor that impacted on the negative resistance characteristics of the long-base silicon magnetic sensitive diode.
Design of Screw Wheel Micro In-Pipe Robot Control System
Authors: Liu Cai Xia
Published: July 2013

The micro in-pipe robot is widely used in the industrial inspection, maintenance, and cleaning of petrochemical, refrigeration and nuclear power plants. The mobile mechanism, data acquisition and processing technology of micro in-pipe robot have high practical value and academic significance. A 60mm diameter in-pipe robot with spiral wheel structure is designed, which has the advantages of simple principle, compact structure and convenient control. Its screw wheel moving structure ensures the robot has a large traction and movement speed. DSTJ-3000 intelligent differential pressure sensor is equipped with the micro in-pipe robot, which collects action data to the microcontroller C8051F330. Data is transferred to the PC through the wireless Bluetooth module, processed and displayed by Visual Basic application program. Screw wheel micro in-pipe robot control system can freely control its forward, backward, speed adjustment, and self-locking through the PC software.