bluuebunny/crossref_metadata_2025 huggingface dataset:
The Performance Analysis and Prognosis Techniques of Gearbox
Authors: Wang Chun Chieh , Kang Yuan , Tu Tse Yi
Published: May 2013

Under the situation of increasingly stringent requirements for production speed and quality, gearboxes in many manufacturing equipment production lines lose final processing quality after long-term severe service.Machine fault prognosis is for experts or on-site maintenance personnel to use measurement equipment to capture signals and conduct diagnosis and maintenance based on personal experience. As technologies are advancing rapidly and equipment is evolving with increasing level of scale, automation and complexity, traditional diagnostic methods are no longer applicable. The article aims at vibration signal of gearbox to establish analysis and prognosis techniques. Principal components analysis is utilized to effectively capture the characteristic signal. Logistic regression and autoregressive moving average models are utilized to establish the correlation between characteristic signal and gearbox health status and performance trend model for on-site maintenance personnel to instantly understand gearbox health status and potential problems.In addition, Self-organizing map is utilized to establish fault identification model for maintenance personnel to significantly reduce troubleshooting time. In the article, gear-rotor experiment platform is used to assess the feasibility of gearbox performance analysis and prognosis techniques. It is expected to provide gearbox makers and users with understanding of gearbox health status and total solutions.
Research Progress of Manufacturing Technology of Enhanced Heat Transfer Structures
Authors: He Zhan Shu , Liang Cheng Cheng , Yang Xue Fei
Published: May 2013

In order to transfer heat as much as possible through a unit area in unit time, this paper introduces three enhanced heat transfer structures, namely microchannel, open-celled metal foam and open-celled sintered porous metal. Furthermore, the manufacturing methods of three enhanced heat transfer structures are summarized and comparatively analyzed. Among three enhanced heat transfer structures, open-celled sintered porous metal has the best heat transfer performance, followed by open-celled metal foam and microchannel. While, the sequence of the pressure drop of three enhanced heat transfer structures is in the reverse order. In addition, the manufacturing technology of three enhanced heat transfer structures remain inadequate. Thus, enhanced heat transfer structures with good heat transfer performance and small pressure drop and their corresponding manufacturing technology are the future research direction.
Study on Adjustment of Large Structure Objects’ Shipment Processing by Trailers
Authors: Li Jian Min
Published: May 2013

Different from the Slippage shipment, when using platform trailers for shipment, the structure’s weight evenly distributed on the small wheel’s axles, because of tire’s deformation, as the trailers continue moving to the barge, the surface contact between the wheels and ground makes the load gradually apply to the barge, then the center of gravity also changes. In this research, based on analysis of the heavy truck’s tire deflection curve, in the process of load distribution, method of calculating the structure’s weight on barge with the trailers gradually move forward can be obtained, through simulation analysis, the load adjustment can be ensured accurately.
Thermoelastic Coupling Vibration of the Moving Rectangular Plate
Authors: Guo Xu Xia
Published: May 2013

The dynamic characteristics and stability of the thermoelastic coupling moving rectangular plate are investigated. Based on the heat conduction equation involving the thermoelastic coupling term and the differential equation of motion of the plate subjected to the thermal shock, the thermoelastic coupling differential equation of the moving plate is derived. Dimensionless complex frequencies of the thermoelastic coupling moving rectangular plate with two opposite edges simply supported and other two edges clamped are calculated by the differential quadrature method. The results show that the first mode behaves divergent instability firstly, and the critical divergent moving speed of the first mode increase with the increase of the thermoelastic coupling factor for the two kinds of boundary conditions.
An Experimental Study on Flexural Behavior of Reinforced Concrete Beams with GFRP Bars and Recycled Coarse Aggregate
Authors: Kim Seung Hun , Lee Yong Taeg , Kim Tae Soo , Hong Seong Uk
Published: May 2013

This study evaluates the flexural performance of reinforced concrete beams with GFRP(Glass Fiber Reinforced Polymer) bars and RCA(Recycled Coarse Aggregates). A total of four specimens with various replacement ratios of RCA (0%, 30%, 50%, and 100%) were tested. An investigation was performed on the influence of RCA with various replacement ratios on load-carrying capacity, post cracking stiffness, cracking pattern, and ductility. The test results showed that replacement ratios of RCA had not a bad effect on concrete compressive strength or flexural strength of beams. They were compared with the design flexural strength and the nominal moment predictions of ACI Code.
Influence of Punch Velocity and Strength Matching on the Quality of SPR with Half-Hollow Rivet Based Numerical Simulation
Authors: Xu Li Juan , Cui An , Yang Qiang
Published: May 2013

With the increasing application of lightweight multi-materials in vehicle body, the SPR （self-piercing riveting）with half-hollow rivet is used to connect hybrid metals due to its simple operation and reliable connection. In this paper, appropriate size parameters of half-hollow rivet and die are selected according to sheets’ thickness after the determination of hybrid metal materials, namely FAS2205 dual phase steel, AA2036 aluminum alloy, AA7050 aluminum alloy, AA6061 aluminum alloy and 460E high strength steel. The finite element model of SPR with half-hollow rivets is constructed and the accuracy of which is proved by comparing with the experiment in the relative reference. What’s more, the Johnson-Cook constitutive model is taken as material model to simulate the plastic and hardening behaviors during riveting process. The influence on joint quality of the strength matching of rivet/bottom sheet is studied through numerical simulation and direct observation, and the relationship schematic diagram between them is gained. Meanwhile, the riveting joints at several uniform loading velocities are simulated and the quality of which are analyzed. The research results show that the appropriate matching of rivet to the bottom sheet strength is a key prerequisite for joint quality and the punch velocity plays an important role on the riveting joint quality and efficiency of assembly.
Three-Dimensional Parametric Modeling and Finite Element Analysis of Drum on Belt Conveyer
Authors: Wu Zhi Tao , Guan Wei Juan
Published: May 2013

The paper achieved the 3D parameterized model of the drum with VB programming in Solid Works CAD software environment, and completed the finite element stress and strain analysis for the drum structure with ANSYS finite element analysis software. The force and deformation of the driving drum was basically mastered. A full process from 3D parameterized model to structural analysis for the drum was implemented in this paper. It highly improved the drum design level and efficiency.
The Applications of Neural Networks in the Engineering Cost of Transmission Line
Authors: Sun Hong Fei , Tang Qing Song , Li Yu Ling
Published: May 2013

With the rapid development of the electric power industry in recent years, the strengthening of the power construction market and the diversification of the main body of power investment, there appears a prominent question in front of the project owners——How to control and reduce construction costs? There are many methods to estimate the cost quickly and accurately. Among the common methods and some new ways which have appeared in recent years, people can find about seven types out of them, in which, neural network model is known for its versatility and adaptability. It does not exclude new sample. On the contrary, it improves its ability to generalize and forecast with the increasing number of samples. Therefore this paper establish a cost estimation model by introducing neural network which is based on the optimization of genetic algorithm, and expresses the relationship implied in the interior of data by using the network topology and parameters by studying a large number of samples so as to fit the conventional non-linear mapping relationship between the amount and cost of a transmission line project. The results show that the artificial neural network model has a significant effect on the project cost estimation. The introduction of neural network model will certainly promote the development of informatization of power project costs management.
Dependence of Thermodynamic and Optical Properties on Glass Compositions in Low-Phonon Energy Heavy-Metal Gallate Glass System
Authors: Han Xiao Zhe , Wang Fei , Zhao Xin , Ma Tie Cheng , Wang Zhi Qiang , Lin Hai
Published: May 2013

Dependence of thermodynamic and optical properties on glass compositions in low-phonon energy heavy-metal gallate (MHG) glass system has been investigated. With the increase of Ga2O3and the decrease of Bi2O3, temperature difference value (DT) of Ho3+-doped MHG glasses is increased from 68 °C to 98 °C, in the meantime, thermal stability parameter (H) is enhanced from 0.224 to 0.263, and Saad-Poulain criterion (S) is heightened from 5.59 °C to 13.17 °C. The increments of thermal parameters indicate that the thermal stability against crystallization can be improved for potential optical fiber drawing. The blue shift of cut-off wavelength is confirmed due to the adjustment of glass compositions, which broadens the visible transmittance window, indicating that more options of blue and green excitation light sources make MHG glasses promising candidates for developing functional optoelectronic devices.
Solution to Holes Machining Path Planning by Intelligence Computation
Authors: Zhang Jing
Published: May 2013

The rapid development of electronic information industry has posed serious challenges to the electronics manufacturing technology and intense competition in the market. For the most basic parts of electronic components - holes of the printed circuit board processing efficiency issues need to be resolved, the machining tool path optimization techniques. Optimize holes machining path reducing tool movement time is an effective way to improve production efficiency. Machining path optimization problem is transformed into a traveling salesman problem, shortest processing path established path optimization mathematical model on the basis of the model, the analysis of a variety of typical optimization algorithm, simulated annealing algorithm, genetic algorithm, ant colony algorithm, particle swarm optimization, comparing the various algorithms, based on theoretical analysis and experimental research, for the complexity of the algorithm evaluation, flexibility, local optimum probability, feedback information utilization and weight.
Designing Hydrogen Networks with Multiple Impurities by Combining Concentration Potential Method with Sources Matching Methods
Authors: Pan Chun Hui , Wang Huan Yun , Ma Li , Lu Ming Zhu
Published: May 2013

Combining the concentration potential method with the sources matching method, an integration method for designing hydrogen distribution networks with multiple impurities is presented by This paper. The concentration potential method was used to determine the process-performing order. When a hydrogen-using process is being satisfied, The target is to reduce the consumption of the external hydrogen source, The design ideas by drawing a single impurity the source matching law, the choice and distribution complementary sources method is improved to be used, multiple rules of multi-impurity source distribution is presented. The example show that the proposed method resulting design compared with the current production, the external hydrogen source consumption decreased by 65.6%, resulting network structure is simple, simple design steps and calculations are not complicated. The description of the proposed method is effective and feasible.
Study on 3D Shape Optimization for Hydrodynamic Journal Bearing Using Goal Attainment Multi-Objective Function
Authors: Pang Xiao Ping , Chen Jin
Published: May 2013

This paper is focused on multi-objective optimization to find the best performance related to the geometrical design of the hydrodynamic journal bearing in three dimensions 3D. The mathematical model for 3D film thickness profile was driven using Fourier’s series function and axial waviness value to represent in circumferential and axial direction respectively. A Goal attainment function was used as an optimization tool with goals to minimize the power loss and side leakage and to maximize the load capacity, while the amplitude (a), number of wave (m) and Fourier's series coefficients of the general film thickness were taken as design variables subjected to several bounds and constraints. The optimized results show the cylindrical plain bearing is the best to load capacity due to changing the axial shape does not enhance the load capacity without violation of the minimum film thickness. Comparison was made between goal attainment multi-objective optimization and GA single-objective optimization. The new method for shape optimization based on 3D general film thickness is more evident than GA.
Spectrophotometric Determination of Trace Hg2+ with hsDNA-Modified Nanosilver Probe
Authors: Liang Xiao Jing , Wen Gui Qing , Jiang Zhi Liang
Published: May 2013

Herring sperm DNA (hsDNA) was used to modify 5 nm nanosilver to obtain a hsDNA-nanosilver probe (Ag-hsDNA) for Hg2+. In the presence of Hg2+, it combined with hsDNA to produce Hg2+-hsDNA complexes and to release nanosilver particles, based on formation of stable T-Hg2+-T mismatches. Nanosilver particles aggregated to form larger nanosilver clusters and led the absorption at 412 nm decreased in the pH 6.5 Na2HPO4-NaH2PO4buffer solution and 0.05 mol/L NaCl medium. The decreased absorption (ΔA412nm) is linear to Hg2+concentration in the range of 1.36-10.86μg/L Hg2+, with regress equation of ΔA=0.0987CHg2++0.0624, correlation coefficient of 0.9890, and detection limit of 0.30μg/L Hg2+. The assay was applied to the analysis of Hg2+in wastewater with satisfactory results.
A Method of RAM-Based Frequency Acquisition for Base Station Positioning Receiver
Authors: Yuan Xie , Deng Zhong Liang , Zhang Yu
Published: May 2013

Location based service (LBS) is more and more important nowadays. Assisted with GNSS, Base Station Positioning System (BSPS) can offer seamless outdoor & indoor positioning. The fading channel causes problems in signal acquisition. In this paper, a new method of RAM-based frequency acquisition is introduced, which can acquire the residual carrier frequency in fading channel accurately.
The Detection of Surface Quality On-Line Based on Machine Vision in the Production of Bearings
Authors: Wang Chang , Gao Jing Jing
Published: May 2013

The combining of digital image processing technique and pattern recognition technique, it can be wild used in the products of industry classification and recognition Line bearing assembly defects in this article for the detection and identification of needs, Automatic detection system based on machine vision, contrast measurement plane array camera on a different surfaceImage acquisition, binarization processing for subsequent pretreatment image pattern recognition, feature extraction and eigenvalue comparison, product line surface defect detection and identification.
Weakened Support Detection Based on Road Slab Vibration Response
Authors: Zhu Fu Min , Gan Quan , Li Ya Fei
Published: May 2013

This paper presents a vibration testing method to monitor the deterioration and weakened support on slabs of cement concrete pavement. After discussing on methods for void evaluation, a dynamic finite element model of road slab with Winkler foundation assume is established according to the structure of slabs both in good condition and conditions with varying degrees’ defects, and computer simulation to vibration characteristic is conducted and a corresponding measuring system is proposed. Its results can be used to guide actual test.
Hand/Eye Calibration Using 3D-3D Correspondences
Authors: Kim Dong Whan , Ha Jong Eun
Published: May 2013

In industrial application, robots do the operations that have predefined location taught by teaching pendant. Recently, sensors including camera and laser range finder are used together with robot to expand the capabilities of the robot. Hand/eye calibration is the first necessary step to transform sensor based measurements into the robot coordinate system. Traditional hand/eye calibration algorithm used known robot motions. Kinect is used as the 3D sensor and chessboard markers are attached on the robot’s arm. In this paper, we solve hand/eye calibration using 3D-3D correspondences.
Evaluation of Properties of FIB Deposited Metal Layer and Application to Temperature Sensing
Authors: Choi Dae Keun , Lee Sang Hoon
Published: May 2013

In this paper, the properties of Focused-Ion-Beam (FIB) deposited platinum layer are investigated using the MEMS processes. First, the electrical properties are examined with three parallel metal lines and the measurement result shows over one hundred times larger resistivity than that of the conventional platinum layer. This feature is due to the additional materials like carbon compound and the gallium ion. The thermal properties are also investigated about the temperature coefficient of resistivity (TCR). The measured TCR values are -0.0015~-0.0020 K-1 which are different from the positive TCR in conventional platinum layer. The carbon compound has negative TCR and changes the properties of FIB metal layer. Although some non-uniform properties are observed, the properties of FIB deposited platinum layer are sufficient for the temperature sensing applications at small area.
Study on Detection of Structures Crack Based on Digital Image Technology
Authors: Zhao Ye Bao , Yao Wen Juan
Published: May 2013

The emergence of cracks of structures is the initial omen of the structural damage. From the initial stage, structural cracks which are undistinguishable by naked eyes exist gradually and then contribute to the member damage, structural deformation and systematic instability as well. This paper made a detection and analysis for cracks of cement flooring by utilizing the digital picture technology, converting a color Image into a gray-scale image. Then ,an appropriate threshold was determined to distinguish between cracks and the background in a gray-scale image. Then, an edge-detection method and morphological techniques of dilation and erosion were used respectively to eliminate noise in the corresponding binary images and obtain crack boundaries.The graphic process program developed can be used to process the gained digital pictures .
The Application of Fuzzy Control in Position Control for Tanker Drag
Authors: Yan Jian Guo , Xi Ao , Xiao Zi Bing , Xiong Hai Xia
Published: May 2013

In order to obtain much better control effect, position control system uses position-speed dual closed loop structure in the testing system of hard air refuel tanker drag system. According to the characteristics of nonlinear system, PID controller and fuzzy controller were taken as the outer loop controllers. The simulation results show that the fuzzy control system is superior to PID control. By comparing response curves with different load, it is easy to see that fuzzy control can be more effective than PID control in restraining overshoot and improving the dynamic performance.
Near-Optimality in Stochastic Control of Predator-Pray System with Markov Switching
Authors: Li Xi Ning , Wei Dong Mei
Published: May 2013

In this paper, we introduce a stochastic predator-pray system with Markov switching. We establish the necessary conditions of near-optimal control for this system. The proof of the main results are based on Ito's formula, Ekeland's variational principle and some estimates on the state and the adjoint process with respect to the control variable.
ARM-Based Resistance Furnace Neural Network Temperature Control System Design
Authors: Fang Hong , Li Hong Lian
Published: May 2013

to promote the measuring and controlling precisions of temperature control system, in this paper, a temperature detecting circuit is made up of thermocouple and digital conversion chip MAX6675 with ARM chip at its core. The PID control algorithm of single neural network is also brought up herein and adopted in simulating the temperature control system of resistance furnace. The result shows that PID control algorithm of single neural network can achieve better controlling effects than the traditional one and realize precise control over temperature.
The Research on Speed Control of Tanker Drags System for Aerial Boom Refueling Test System
Authors: Xi Qing Biao , Yuan Dong Li , Xiao Zi Bing , Zhang Xin
Published: May 2013

For aerial boom refueling test system a suitable drag motor of tanker drag system is selected. The mathematical model of the drag system is established, and then speed control of the system is studied. The PID control algorithm is designed, and then, system responses in the case of no control strategy and in the case of PID control are comparatively studied. Simulation results show that the system with no control strategy can not meet the requirement; on the contrary, the PID controller can make system response stable, accurate and rapid, at the same time, the system with PID controller can greatly enhance load capacity and anti-interference capability of the system.
Robofish Formation Control Based on the Theory of Consensus
Authors: Deng Yan Song
Published: May 2013

A formation control model is studied for robofishs. A consensus-based algorithm is proposed to maintain a specified time-varying geometric configuration for formation of Multi- Robofishs. In this approach, the proposed control strategy requires only the local neighbor-to-neighbor information between robofishs. Speed and heading angle synchronization is realized and the two dimensional space formation can be achieved by the proposed consensus algorithm. The effectiveness of the algorithms is demonstrated through detailed simulation studies both in Matlab and 2D Simulation Platform.
Design on Intelligent Overfreight Scale System of Coach in Vehicle Engineering
Authors: Song Yan Dong
Published: May 2013

In recent years, Chinese highway transportation problem became more and more serious in the overfreight, which has become a danger for the lives and state property security, and affected social economic coordination but also the social healthy development. The development and popularization of load meter is one of the solution of this problem. In addition, the implementation of more reasonable meter weight charge way also need to load instrument as the foundation. In this paper, based on the infrared detection circuit and microcontroller overfreight scale system of the coach was designed. When the coach pass through load meter with a certain speed, it can weigh out the axle loading of the coach, accordingly it can judge that whether the vehicle is overfreight or not.
High Hydrophilic Poly(Ethylene Terephthalate)(PET) Fabric Modified by Ionic Agent
Authors: Xu Fang , Zhang Guang Xian , Zhang Feng Xiu , Wu Da Yang
Published: May 2013

As the surface of polyester fabric is hydrophobic, it is not comfortable to wear. In this paper, the surface of polyester fabric was ionized by an ionic agent. The result showed that the ionized polyester fabric had wonderful hydrophilicity. The water contact angle of ionized polyester fabric decreased to 0o, and the capillary rise height increased from 0.4cm to 14.4cm, water content from 23.77% to 119.78%. Water spraying rate decreased from 4 degree to 1 degree. The whiteness of ionized polyester fabric kept well.
A Current Compensation Bitline Sense Amplifier
Authors: Li Xuan , Bai Na , Wu Zhan Fang
Published: May 2013

A new bitline sense amplifier (SA) for improving performance in the presence of current compensation is analyzed. The proposed scheme utilizes a new leakage current compensation circuit, resulting in a 42.9% reduction in the delay from bitline discharge to the date been read out. Thus, this is very important for higher performance application, especially under advanced technology process.
A Computational Analysis of Flow Field in Twin-Track Subway Tunnel to Improve Air Quality
Authors: Juraeva Makhsuda , Ryu Kyung Jin , Jeong Sang Hyun , Song Dong Joo
Published: May 2013

A computational model of existing Seoul subway tunnelwas analyzed in this research. The computational model was comprised of one natural ventilationshaft, two mechanical ventilationshafts, one mechanical airsupply, a twin-track tunnel, and a train. Understanding the flow pattern of the train-induced airflow in the tunnel was necessary to improve ventilation performance. The research objective wasto improve the air quality in the tunnel by investigating train-induced airflow in the twin-track subway tunnel numerically. The numerical analysis characterized the aerodynamic behavior and performance of the ventilation system by solving three-dimensional turbulent Reynolds-averaged Navier-Stokes equations. ANSYS CFX software was used for the computations. The ventilation and aerodynamic characteristics in the tunnel were investigated by analyzing the mass flowrateat the exits of the ventilation mechanicalshafts. As the train passed the mechanical ventilation shafts, the amount of discharged-air in the ventilationshafts decreased rapidly. The air at the exits of the ventilation shafts was gradually recovered with time, after the train passed the ventilation shafts. The developed mechanical air-supply for discharging dusty air and supplying clean airwas investigated.The computational results showed that the developed mechanical air-supplycould improve the air quality in the tunnel.
Design Simulation on Automatic Mechanical Transmission of Electric Vehicle
Authors: Song Yan Dong
Published: May 2013

By optimizing the matching of automatic transmission of car, it could improve the overall performance of electric vehicles. This article analyzes the structure of the electric vehicle drive train, then selects the automatic mechanical transmission combined with the motor-driven features. Then calculate the parameters of motors, batteries, transmission and other parts. The electric vehicle model was created in the Advisor software, then the simulation conditions were selected to test the car, so the vehicle dynamic characteristics and economy were verified by simulation results.
Design on Four DOF Pneumatic Conveyance Manipulator Based on PLC
Authors: Wang Xiao Mei , Zhou Xiong , Yang Meng Tao
Published: May 2013

The design of four degrees of freedom pneumatic conveyance manipulator based on PLC is introduced in the paper. The work task of the manipulator was briefly introduced. The structural design, work cycle, pneumatic control circuit design and PLC control system design are introduced in detail. The manipulator has the advantages of simple in design, stable and reliable act,research and development in low-cost. The design is to provide a reference for other design of economic type manipulators.
Physical Properties of High-Temperature Liquid Furnace Slags
Authors: Feng Wen Jiang , Wang Chuan Yin , Zhang Zhi Guo , Zheng Wei
Published: May 2013

The room-temperature furnace slag from a pig iron plant was investigated and the corresponding chemical composition was obtained. The temperature dependences of viscosity coefficient, resistance, and heat transfer coefficient were measured in detail. With increasing temperatures, the value of viscosity coefficient and resistance is lowered, while that of heat transfer coefficient enlarged. The fit of temperature dependence of viscosity coefficient gives y0=1.9672, A=1.95×1019, t=31.8. Above 1000 oC, solid slags become melted and flown, with abrupt increase of heat transfer coefficient. Based on the designing of medium-frequency induction furnace, we can conclude as follows: (1) the liquid slags are conductive with a small conductance, which reveals that the medium-frequency induction furnace can be employed with a small power; (2) heat transfer coefficient gets enlarged with increasing temperature, which indicates that the higher the temperature is, the larger the heat loss gets.
Study on Scroll Profile Design Using Involute of Elliptic for Scroll Compressor
Authors: Hwang Shen Jenn , Li Shin Tang , Hwang Yunn Lin , Chen Chien Hsin
Published: May 2013

The scroll compressor has the conjugate motion of meshing by the fixed scroll and the planet scroll. Several kinds of geometrical curves can be adopted to form the scroll compressor profile such as involute of circle with variable and constant radius, algebraic spiral, and so on, to improve the performance of scroll compressor. This study proposes a new scroll profile design using elliptic involute and two-envelope method to create a new conjugate meshing scroll of variable cross section. The curve of the scroll section on both sides can be specified as an arbitrary mathematical function. First, the base scroll swept out by the central base circle. Next, the base circle translation path envelope of the planet scroll is moved by the basic involute curve. The base circle translation path envelope is the first envelope. The second envelope generated by the planet scroll conjugate profile is the fixed scroll. By using two-envelope method, the variety of conjugate scroll can be produce with the cross section and symmetrical variables for parametric design.
Design and Research on Automatic Medicine Vending Machine Based on the Ergonomics
Authors: Xu Lu , Wu Feng Lin
Published: May 2013

Modern services are becoming polarized. With the emergence of more and more automatic terminal services, modern services are also gradually becoming unmanned. The automatic medicine vending machine exactly emerges under the background mentioned above. The emergence of automatic medicine vending machine can reflect the reform of China’s existing medical system to a certain extent, solve the tense supply-demand relationship between doctors and patients in China, and help some patients to achieve self-improvement and self-healing without going to the hospital. For that reason, based on the principle of ergonomics, this paper will probe into and analyze how to design more humanized automatic medicine vending machine to better fit people’s practical requirement.
Aircraft-Carried Aerosol Sampling Inlet by CFD Simulation
Authors: Wang Bao Qing , Liu Yu Hong , Lan Shi Quan , Yao Shu , Yin Shuai
Published: May 2013

A aerosol sampling inlet has been designed from high-speed aircraft. The objective of the design is to achieving isokinetic and minimizing disturbance for the sampling system. This study was conducted using the CFD code to perform a turbulent simulation of the airflow on the aerosol sampling inlet. The inlet is flown regularly on board an aircraft of Yun-12. The flow rate through the sampling suction tube is a constant value of 100 L/min. The shroud diameter is 150 mm. The diffusion tube inlet and outlet diameter is 35.3 mm. The suction tube diameter is 20.6 mm, which act as transferring aerosol at the velocity of 5 m/s. Results are presented graphically, showing the suction bending radius take 50 mm is more appropriate. It is shown that the diffusion tube slows the sample flow from 40 m/s of the airspeed of the aircraft to approximately 5 m/s. It is suggested that CFD simulation can be useful for improving the optimum aircraft-carried aerosol sampling inlet.
A Durable Superhydrophilic Modification of Polyester Fabric
Authors: Zhang Guang Xian , Xu Fang , Hu Wei , Zhang Feng Xiu
Published: May 2013

In this paper, a durable superhydrophilic modification was applied to polyester fabric to improve its wettability- HAS treatment. The wetting ability of HAS treated polyester fabric improved a lot; the water contact angle could decrease to 00 in 3s; the water content increased up to 115%; the wicking distance increased up to 15cm; spraying rate improved to 1 degree. The wearability tests showed the breaking strength and creasability remain almost the same as untreated polyester fabric.
Wear Mechanism of Si3N4/TiC Micro-Nano-Composite Ceramic Tool in Dry Machining of Nodular Cast Iron
Authors: Lü Zhi Jie , Ding Ming Feng , Zhao Jun
Published: May 2013

In this paper, a type of Si3N4/TiC micro-nano-composite ceramic tool materials were fabricated via hot pressing technique by adding Si3N4 and TiC nanoparticles and with Al2O3 and Y2O3 as additives. Tool wear in dry machining of nodular cast iron with Si3N4/TiC micro-nano-composite ceramic tool were investigated, in comparison with a commercial Sialon ceramic tool. For determination of the wear resistance, the workpiece which is prepared to be used in the experiment, 400 mm in length and 120 mm in diameter, is machined in lathe. Turning experiments were carried out at three different cutting speeds, which were 110, 175, and 220 m/min respectively. Feed rate (f) and depth of cut (ap) were kept fixed at 0.1mm/rev and 0.5mm. The results show that the two types of cutting tools have similar cutting tool wear behavior, while the Si3N4/TiC micro-nano-composite tool exhibits a better wear resistance than that of the Sialon tool. The wear of Si3N4/TiC micro-nano-composite ceramic cutting tool is mainly dominated by the abrasion, while the wear of Sialon ceramic cutting tool is dominated by the abrasive action, microcracking and pullout of grains.
Study of Electrical and Aging Properties on the La-Doped Aurivillius Phase Ferroelectrics BaBi4Ti4O15
Authors: Yu Bai Wei , Zheng Qian Qian , Pan Li Jing , Zhang Dong Hua , Tang Yan Xue , Sun Da Zhi
Published: May 2013

Aurivillius phase ferroelectrics Ba(Bi1−xLax)4Ti4O15(x=0-0.05) (BBiLxT) was synthesized by a modified high-temperature solid-phase route.The structure, the dielectric, the ferroelectric and the aging properties were investigated systematically. With the La3+doping, the room temperature relative permittivity of the samples is increased, and dielectric loss is decreased. For the BBiLxT phase, only a weak variation with respect to the F2mm space group can be suggested from single crystal X-ray diffraction. The microstructure confirms the samples have a well-proportioned grain size and a higher density. The substitution also results in a marked improvement in the remnant polarization. The doping of La3+in BBiLxT ceramics increased the room temperature relative permittivity aging properties.
Weakly Nonlinear Stability Analysis of a Thin Power-Law Fluid during Spin Coating
Authors: Lin Ming Che , Chen Chun I , Huang Shou Jen
Published: May 2013

The weakly nonlinear stability of a thin Ostwald de-Waele power-law fluid during spin coating is investigated. Long-wave perturbation analysis is proposed to derive a generalized kinematic model of the physical system with a small Reynolds number. The study reveals that the rotation number generates a destabilizing effect either in pseudoplastic fluid or in dilatant fluid. Further, it is shown that the degree of power-law index n plays a vital role in stabilizing the film flow.
Red Light Emission from Silicon Created by Self-Ion Implantation and Thermal Annealing
Authors: Lu Sai , Wang Chong , Wang Wen Jie , Yu Jie , Yang Jie , Yang Yu
Published: May 2013

Silicon substrates were implanted with Si ions at an energy of 60 keV to a dose of 5×1015cm-2followed by a thermal annealing at various temperatures up to 950 oC. Photoluminescence (PL) and infrared absorption (IRA) techniques have been used to characterize these samples. The PL peak positions at 2.07 eV and 1.93 eV undergo redshifts with the increasing annealing temperature. The two IRA peaks at 1080 cm-1and 800 cm-1are ascribed to the Si-O-Si asymmetric stretching and the Si-O bending vibration, respectively. The experimental results indicate that Si nanocrystals embedded in silicon oxide layer can be formed at the annealing temperature 800 oC or higher.
The Influence of the Hydrothermal Temperature on the Morphologies and the Optical Absorption Properties of M-ZrO2 Nanoparticles
Authors: Fu Xiao Ming
Published: May 2013

M-ZrO2 nanoparticles with a diameter range of about 10 nm are successfully synthesized with zirconium nitrate as zirconium source and stronger ammonia water as precipitant at 210 °C for 48 h via the easy hydrothermal method. The phase, the morphologies and optical absorption properties of the samples have been characterized and analyzed by X-ray diffraction (XRD), field-emission transmission electron microscopy (TEM) and ultraviolet-visible absorption spectroscopy (UV-VIS), respectively. XRD analysis shows that the phase of as obtained samples is M-ZrO2. TEM analysis confirms that the increase of the reaction temperature is in favor of the synthesis of M-ZrO2 nanoparticles. And UV-VIS measurements show that M-ZrO2 nanoparticles have a good optical absorption property.
Large Reversible Capacity of Graphene Electrodes Used in Lithium-Ion Batteries
Authors: Bai Li Zhong , Zhao Dong Lin , Zhang Ji Ming , Li Feng
Published: May 2013

High quality graphene sheets (GSs) were prepared from natural graphite by oxidation, rapid thermal expansion and ultrasonic treatment. The morphology and structure of GSs were systematically investigated by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier tansform infrared spectroscopy (FT-IR) and Raman spectroscopy. It was found that the GSs electrode used in lithium-ion battery (LIB) exhibited a relatively high reversible capacity of 902 mA h/g at a current density of 50 mA/g. After 50 cycles, the reversible capacity was still kept at 734 mA h/g.
Mn-Zn Ferrite TP4K Material with Low Power Loss at High Temperature
Authors: Xing Bing Bing , Nie Min , Zhang Qiang , Li Yin Chuan
Published: May 2013

The Mn-Zn ferrite TP4K material was prepared by traditional oxide method, which has high saturation magnetic flux density and low power loss at high temperature. The Bs of the TP4K material is 535mT at room temperature, 430mT at 100°C, 350mT at 140°C; At temperature T=140°C, the power loss is lower than 340 kW/m3, which was measured under the frequency f=100kHz, the magnetization B=200mT.
Preparation and Research of Long Afterglow Luminescent Materials
Authors: Xu Wen Feng , Zhang Xue , Zhang Ling , Jiang Shan Quan
Published: May 2013

In this paper, sol-gel method at low temperatures, an atmosphere of carbon reduction to replace the use of cyclodextrin system prepared with citric acid as SrAl2O4: Eu2+, Dy3+ Long Afterglow Phosphors nanotechnology. And the use of X-ray diffraction phase identification and fluorescence spectrophotometer with the excitation spectrum of the sample, luminescence spectra and luminescence afterglow to explore research, results show that product with the lower cost has the luminescence properties.
The Applications of Terahertz Spectroscopy in Functional Optical Materials Researches
Authors: Fu Xiao Jian , Zhou Ji
Published: May 2013

Terahertz radiation refers to the electromagnetic wave whose frequency is usually defined between 0.1 and 10 THz (1 THz=1012Hz). With the development of the emission and detection technologies of THz radiation, terahertz time-domain spectroscopy (THz-TDS) has been widely used in medical diagnosis, security inspection and materials characterization. In this paper, we introduced briefly the progress of terahertz measurement technologies, and then reviewed the applications of THz spectra in functional materials researches. As two important functional optical materials, TiO2nanoparticles and yttrium aluminum garnet (YAG) crystal have been investigated with THz-TDS. We introduced the electron injection process in TiO2studied by time resolved THz spectroscopy which is reported in the literature, and then presented our own work, the THz optical constants of undoped and Tm3+doped YAG crystals.
Preparation and Photoelectrochemical Properties of TiO2 Nanotube Arrays Modified with Nano-Scaled CdSe
Authors: Liu Jia Qin , Wang Yan , Xu Guang Qing , Zheng Hong Mei , Pan Rong Jun , Wu Yu Cheng
Published: May 2013

Highly ordered TiO2 nanotube arrays (TNTAs) with smooth walls and uniform diameter were prepared by electrochemical anodization. And then solution deposition process was adopted for the modification of the TNTAs with nanoscaled CdSe. The materials obtained were characterized by field emission scanning electron microscopy, UVvisible spectroscopic and photoelectrochemical techniques. The results revealed that the morphologies and growth mechanism for CdSe/TNTAs composites varied with the reaction time in Se2- solutions (c=1.2 mol/L) when nanotubes were firstly imported with Cd2+ ions. Optical absorption behavior of the CdSe/TNTAs composites increased with more CdSe nanoparticles. And the photo-response of the obtained nanomaterials was first strengthened and then declined with the sustained increase of the deposited CdSe.
Negative Refraction in Indefinite Materials
Authors: Wu Hong Ya , Zhou Ji
Published: May 2013

Negative refraction is a fantastic optical property and attracts more and more attentions. As first proposed, materials with negative permittivity and negative permeability simultaneously exhibit negative refraction. Recently, negative refraction was found in the indefinite medium based on the strong anisotropy of permittivity. In this paper, the theory of the negative refraction in the anisotropic materials and the research progress in recent years were reviewed.
Photoluminescence Properties of SiO2:Tb3+ Inverse Opal with Tunable Photonic Band Gap
Authors: Liu Zhen Dong , Li Bo , Zhou Ji
Published: May 2013

Temperature tunable photonic crystals were fabricated based on liquid-infiltrated inverse opal films which were prepared by Tb3+doped SiO2with a sol-gel method. The photoluminescence was investigated with the photonic band gap shift tuned by temperature. The results show that obvious suppression of spontaneous emission occurs when the photonic band gap overlaps with the Tb3+emission band, while enhancement of the emission is observed if the emission band shifts at the edge of the band gap.
Characterizing Dielectric Constant of Ceramics by Mie Resonance Theory
Authors: Liu Xiao Ming , Lan Chu Wen , Zhao Qian , Zhou Ji
Published: May 2013

we present an effective method based on Mie resonance theory to characterize dielectric constant of ceramics. A mixture of Ba0.5Sr0.5TiO3(BST) and MgO was used to fabricate dielectric cubes with lengtha=2mm. the first resonance frequencyf1of our BST-MgO cube is 11.09GHz and we find that the relative pemittivity of our BST-MgO ceramic is 130 by comparing the simulation and experiment results.
Coulomb Effects in the Ge/Si Single Quantum Dot
Authors: Zhang Li Hong , Wang Chong , Yang Jie , Yao Jin Tao , Yang Yu
Published: May 2013

Using scanning probe microscopy (SPM) technique, the electronic properties of Ge/Si quantum dots (QDs) have been characterized. Our results demonstrate that a layer of a disordered structure is formed between the Ge/Si QDs and the surface of Si substrate due to the defects in QDs during the bias voltage applied. That is, a double tunneling system in which the Coulomb blocking effect can be observed is constructed during the electronic measurement for the single quantum dot (SQD).
Preparation of Sc2Mo3O12 and Characterization of its Negative Thermal Expansion Property
Authors: Li Jun , Cheng Xiao Nong , Zhu Jun Jun
Published: May 2013

Negative thermal expansion (NTE) material Sc2Mo3O12 was prepared by solid-state method. The phase structure, morphology and the thermal stability of the obtained products were examined by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric-differential thermal analysis (TG-DSC), respectively. To study its negative thermal expansion property, two methods were utilized. One is based on the in-situ XRD results and the thermal expansion coefficient (CTE) was calculated by the cell parameters obtained at different temperatures. Another is based on the thermo-mechanical analysis (TMA) and the CTE was calculated by the length of Sc2Mo3O12 bar at different temperatures. The differences between these two methods were also discussed.
Fabrication of Uniformly Growing Graphene Films via the Dip-Coating Method
Authors: Yang Juan , Sun Hong Bo , Li Dan
Published: May 2013

The graphene (GE) films were fabricated in this paper through the deposition of graphene oxide (GO) sheets onto the quartz slide by means of dip-coating technique, followed by thermal annealing. The growth process and transmittance of the film were monitored by ultraviolet and visible spectrophotometer (UV-Vis), the surface morphology and structure were investigated by Atomic force microscopy (AFM), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Raman. The sheet resistance of the film was also tested and results showed that the sheet resistance is about 60 kΩ-1and the transmittance is as high as 81 % (at 550 nm).
The Influence of Base Oil and Thixotropy on Magnetorheological Property of MRF
Authors: Yang Jian Jian , Yan Hua , Hu Zhi De , Xu Shi Xiang
Published: May 2013

Adopting carbonyl iron powder and silicone/mineral oil as suspend phase and dispersed phase separately,and silica, kaolin as lubricant additives,magnetorheological (MR) fluid was prepared by ball milling. The apparent viscosity of base oil and shear stress were measured on a modified rotational viscometer. The experimental results demonstrated that an appropriate viscosity of base oil contributed to the rheology of MRF. Adding a small amount of thixotropy into MRF had little influence on zero-field viscosity, which facilitated the application of MRF to maintain adequate liquidity. Under low shear rate conditions, the shear stress was improved by adding thixotropy to some extent, especially in the mineral oil-based magnetorheological fluid, in which the role of silica was superior to kaolin.
Electrodeposition of ZnO Thin Films with Controllable Impurities and Microstructures
Authors: Chen Xu , Luo De Ying , Li Jun Jie , Wang Xu , Feng Yuan Fei , Xu Zhe , Xiao Hui , Man Jia Xiu , Liu Yong Jun , Liu Zhu
Published: May 2013

To enhance the conductivity and reduce the surface roughness of ZnO films, electrodeposition of ZnO films on the ITO substrate had been studied for the application of inverted organic solar cells. ZnO films with the grain size range from 0.4 to 2 μm had been fabricated by varying the temperature, ion concentration and deposition potentials. Moreover, ZnO films with the impurity energy level of 2.28±0.20 eV origin from the oxygen vacancy, had been found in the PL emission. It is found that as the applied potential went more negative, the concentration of the oxygen vacancies increased, and the emission peak of the impurity level had higher intensity. By changing the ion concentration and temperature of the electrolyte, the controllable microstructure and impurity levels of ZnO thin films had been achieved.
Study on Microstructure and Ferroelectricity of Strontium Barium Titanate Thin Films Prepared by Sol-Gel Processing
Authors: Shan Lian Wei , Wang Lai Guo , Li Wei , Dong Li Min , Han Zhi Dong , Wu Ze , Fu Xing Hua , Hou Wen Ping
Published: May 2013

Sr0.5Ba0.5-xBixTiO3 (SBT) thin films were fabricated on a Pt/SiO2/Si substrate by sol-gel method. The effects of chelating agent acetylacetone (HAcHAc) on the formation temperature and the microstructure of Sr0.5Ba0.5-xBixTiO3 (SBT) thin films were investigated in this paper. The microstructure of BST thin films was examined by XRD and TEM. It is found that Bi3+ doping decreases dielectric loss, improves frequency dispersion for BST thin films. The peak of temperature-dependence of dielectric constant of Bi3+-doped BST thin films is compressed and moves to a low-temperature region. An inclined angle of approximately 1.8o between the two different polarization vectors was observed for BST thin film from the results of high-resolution transmission electron microscopy (HRTEM). The Pr, Ps and Ec was 0.22μC/cm2, 0.72μC/cm2 and 60Kv/cm respectively for Sr0.5Ba0.485Bi0.015TiO3 thin film at 100Hz, 20V.