bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigation of Space Charge Distribution of MgO/XLPE Composites Depending on Particle Size of MgO as Inorganic Filler
Authors: Kim Dae Sung , Lee Dong Hyun , Kim Yoon Jin , Nam Jin Ho , Ha Son Tung , Lee Seung Ho
Published: December 2013

MgO/XLPE composites, composed of micro-and nanosized MgO material having different particle size as inorganic filler and cross linked polyethylene (XLPE), were prepared and investigated to the space charge dynamics of these composites for high voltage DC insulation. Added MgO material, having 50nm to 1μm in size, were synthesized from the calcination of Mg (OH)2nanoplatelets which was controlled by potassium content in Mg (OH)2, varying the dilution volume ratio of distilled water/ Mg (OH)2suspension. MgO/XLPE composites were obtained by thoroughly mixing LDPE and dicumyl peroxide (DCP) as the cross-linking agent and silane modified MgO before kneading to enhance the dispersion degree of the composites. The space charge distributions of the composites were observed by controlling the particle size and content of a dispersed MgO in XLPE matrix. To prevent the breakdown under high DC stress, it was found that the reduction of space charge of MgO/XLPE composite depends upon the smaller size of MgO particle and the its content above 0.5 phr (per hundred part of resin, wt%). MgO material and MgO/ XLPE composites were characterized with TEM, XRD, BET, ICP, and the space charge properties of the composites were measured by a pulsed electro-acoustic method (PEA).
Optimization of ZnO-Coated TiO2 Working Electrode and Application in a Dye-Sensitized Solar Cell
Authors: Chou Chuen Shii , Watanabe Takaharu , Huang Yan Hao , Wu Ping
Published: December 2013

This study investigates the optimization of a ZnO-coated TiO2 working electrode and the effect of this hybrid electrode on the power conversion efficiency of a dye-sensitized solar cell (DSSC). This electrode was fabricated by dipping the TiO2 electrode with the TiCl4 treatment in a solution of zinc acetate dehydrate [Zn (CH3COO)22H2 and ethanol. The effect of the concentration of Zn (CH3COO)22H2O on the band gap of a working electrode and on the power conversion efficiency of a DSSC was also examined. As the concentration of ZnO decreased to 0.002 from 0.004 mol/L, the band gap of the working electrode decreased to 3.08 eV from 3.87 eV, and the power conversion efficiency () of the DSSC increased to 3.8573% from 3.3514%. Interestingly, the of DSSC with a ZnO-coated TiO2 hybrid electrode substantially exceeded that of the conventional DSSC due to TiO2 orbital hybridization and an energy barrier between ZnO and TiO2 that suppressed the electron recombination.
The Effects of Nitrogen Concentration in TiNx and the Thickness of HfSiOxN to the Tunneling Currents in Isotropic TiNx/HfSiOxN/SiO2/Si(100) Capacitors
Authors: Noor Fatimah A. , Abdullah Mikrajuddin , Khairurrijal
Published: December 2013

In this paper, we have computed electron tunneling currents in TiNx/HfSiOxN/SiO2/Si (100) MOS capacitors by including a coupling term between transverse and longitudinal kinetic energies which is represented by an electron phase velocity in the gate. The effective mass of the substrate is considered as an isotropic mass. The transmittance was analytically calculated by employing an Airy-wavefunction approach, and the obtained transmittance was then utilized to calculate the tunneling current for different nitrogen compositions in the TiNx metal gate and the equivalent oxide thicknesses (EOTs) of HfSiOxN. It was shown that the tunneling current reduces considerably as the nitrogen composition of the TiNx metal gate decreases. It was also shown that the increase in the EOT reduces the tunneling current. In addition, the tunneling current shows an oscillatory behavior at high oxide voltages.
Synthesize of SrxLa1-xTiO3 Visible Light Responces Photocatalyst Films for the Water-Splitting Reaction by Pulsed Laser Deposition
Authors: Kurumi Satoshi , Saito Masateru , Kurihara Takayuki , Suzuki Kaoru
Published: December 2013

This In this study, we report on the growth techniques of SrxLa1-xTiO3 visible-light responses photocatalytic films by pulsed laser deposition for the H2 gas generation system as the fuel cell devices. XRD profile showed SrTiO3 peaks were obtained at the all films. Bandgap energy of films were decreaed with increasing the La ratio from 3.2 eV to 2.9 eV. Water splitting reaction were observed at the all films, and the maximum value of the gas generation was 7.3 μmol/cm2h at x = 0.7 film.document explains and demonstrates how to prepare your camera-ready manuscript for Trans Tech Publications. The best is to read these instructions and follow the outline of this text. The text area for your manuscript must be 17 cm wide and 25 cm high (6.7 and 9.8 inches, resp.). Do not place any text outside this area. Use good quality, white paper of approximately 21 x 29 cm or 8 x 11 inches (please do not change the document setting from A4 to letter). Your manuscript will be reduced by approximately 20% by the publisher. Please keep this in mind when designing your figures and tables etc.
Ultra-High Photon Energy Absorption by Gold Nanoparticles Arrays
Authors: Bilotsky Yevgen , Gasik Michael M.
Published: December 2013

Theoretical and practical principles of interaction of light with systems of metallic localized nanoparticles have been outlined and the importance of the electron-optical phonon resonance detuning effect was emphasized to design and develop nanotechnology devices. The demonstration of solar radiation interaction with surface-located gold nanoparticles on rutile was resulted in about 20 times enhancement in energy absorption. This gives possibility to improve different techniques such as energy conversion using optimally structured surfaces.
Experimental Study on Temperature during Wire Saw Slicing
Authors: Yao Chun Yan , Xu Zong Hua , Zhang Wei , Zhang Qiao Fang , Peng Wei
Published: December 2013

Heat generated during wire saw slicing can cause silicon temperature raise and make silicon wafer warpage, especially for larger silicon wafers. In order to study the wire saw effect on silicon temperature during slicing process, three kinds of wire saw, mainly semi-fixed abrasive wire saw and traditional wire saw, are applied for slicing silicon ingot. In this paper, the thermocouple is used to measure the temperature of the silicon during wire saw slicing. The experiment results show that the temperature of the silicon increases along with the wire saw working direction and reaches maximum value near the outlet position of silicon. The temperature of the silicon sliced by semi-fixed abrasive wire saw is lower than that sliced by traditional wire saw.
An Image Transmission System Utilizing Chaos-Based Watermarking Technique
Authors: Zhan Bi Sheng , Liu Duan
Published: December 2013

In this paper, an image transmission system utilizing chaos-based watermarking technique for copyright protection of the image transmission system is demonstrated experimentally. This system assures when pirated image is found, the illegal user can be traced. The users message after chaotic encryption as watermark can be embedded into image. Experimental results show our system which is used for a web-based image transmission is effective and robust. Especially, users message can also be extracted from the watermark image under diverse attacks such as some image-processing operations and Joint Photographic Experts Group (JPEG) compression.
Analysis and Calculation of the Strain Field Disturbance Caused by Dislocation Migration
Authors: Zhang Meng Qi , Yang Shan Wu
Published: December 2013

In order to elucidate the different characters of elastic waves caused respectively by screw and edge dislocation movement, we calculated the stain field disturbance caused by migration of dislocation by elastic theory. Through the calculation, it was found that the strain field disturbance resulted from screw dislocation migration produces a transverse wave radiation while that resulted from edge dislocation migration produces transverse wave and longitudinal wave simultaneously. The result reveals the different energy radiation characters of screw dislocations and edge dislocations and explains the reason that edge dislocation moves faster than screw dislocation in general experiment. It also provides a theoretical basis for determining microcosmic mechanism of plastic deformation of metals by monitoring the changes of elastic waves.
Enhanced Tight Finite Key Scheme for Quantum Key Distribution (QKD) Protocol to Authenticate Multi-Party System in Cloud Infrastructure
Authors: Khalid Roszelinda , Zulkarnain Zuriati Ahmad
Published: December 2013

This research is introducing an enhanced tight finite key scheme for quantum key distribution (QKD) protocol to authenticate multi-party system in cloud infrastructure. The main attraction is to provide a secure channel between a cloud client to establish a connection among them by applying the theories from Von Neumann and Shannon entropies and also Shor's algorithm. By generalizing these theories we will produce enhanced tight finite key scheme for quantum key distribution (QKD) protocol to authenticate multi-party system in cloud infrastructure. Hence we are using quantum channel and also quantum key distribution (QKD) together with BB84 protocol replacing common channel to distribute the key. We are proposing an authentication of multi-party Quantum Key Distribution (MQKD) protocol using an enhanced tight finite key scheme because it will involve a number of parties in cloud infrastructure. Significant of this research is to reduce the possibility of losing a private key by producing a high efficient key rate and attack resilient.
Finite Element Analysis of Stress Concentration at Rounded Crack Tip with Different Physical Parameters
Authors: Yeh Meng Kao , Kao Chien Ming
Published: December 2013

This paper investigates the effect of physical parameters of a rounded crack on the stress concentration near crack tip. The depth and radius at the crack tip are the two physical parameters concerned in this study. The finite element method was used to evaluate the stress value at the crack tip for a silicon chip with a tiny crack under tensile stress. Element type, shape and physical parameters of crack were varied to study their effect on the stress concentration near the crack. The simulation results were compared with the theoretical value, and the better physical parameters as well as the element type, element shape were discussed.
Extraction of Parasitic Parameters on Surface Acoustic Wave Device
Authors: Ro Ru Yen , Lin Zhi Xun , Wu Sean , Keng Chun Huang
Published: December 2013

In this study, we propose an approach to compute the parasitic parameters of an surface acoustic wave (SAW) resonator, which is fabricated on 36o YX lithium tantalate substrate using standard semiconductor processes. The measured admittances of the SAW resonator are used to calculate the corresponding counter parts by applying the Kramers-Kronig relations. The parasitic parameters are then retrieved by minimizing the errors between the calculated and measured admittances.
Electron Beam Lithography for Fabrication of Nanophase-Change Memory
Authors: Yin You , Itagawa Taichi , Hosaka Sumio
Published: December 2013

In this work, we report two methods to fabricate the nanophase-change memory: (1) electron beam lithography (EBL) using the positive resist ZEP-520A followed by phase change material deposition and lift-off processes, (2) EBL using the negative resist hydrogen silsesquioxane (HSQ) followed by reactive ion etching (RIE) after phase change material deposition. For the former method, the optimized exposure dosage is around 40 μC/cm2 and the finest nanowire is about 80 nm in width. On the other hand, the latter method shows that the finest nanowire can be as small as about 15 nm in width after RIE process and the optimized exposure dosage is around 2.0 mC/cm2. In this case, collapse-preventing pattern becomes necessary for fabrication of such a fine nanowire.
Characteristics of Lead-Free Machinable Brass of Powder Metallurgycu-40 Mass%Zn/1.0 Mass% mg with Graphite Particles
Authors: Imai Hisashi , Atsumi Haruhiko , Li Shu Feng , Kondoh Katsuyoshi
Published: December 2013

In this paper, highstrength and lead-free machinable brass alloy with magnesium (Mg) and graphite (Gr) particles was fabricated via powder technology process.Mg particles were added 1.0 mass% for strengthening of brass matrix. Gr particles as machinable elements were added to the Cu-40 mass%Zn /1.0 mass% Mg (Cu-40Zn/1.0Mg) premixed powder by conventional mixing process.Spark plasma sintering process was used to consolidate the above mixed powder at 973 K.The SPSed Cu-40Zn/1.0Mg + X%Gr specimens were pre-heated at the solid solutecondition of Cu-Zn-Mg IMC, and immediately extruded.The machinability was evaluated by a drilling test using a drill tool under dry conditions.The extruded materialsexhibited fine α-β duplex phases, containing very fine precipitates of CuMgZn IMCs with 1-2μm in diameter regardless of Graddition. There was no reaction phase of reducing the machinability between brass matrix and Gr particles.Tensile properties of the extruded Cu-40Zn/1.0Mg +0.75 mass% Grmaterialwereyield strength (YS): 351 MPa, ultimate tensile strength (UTS): 539 MPa, and 18 % elongation.Average of drilling speed of Cu-40Zn/1.0Mg +0.75 Gr (N=10 times) was 0.15 mm/sthough the extruded Cu-40Zn/1.0Mg could not be drilled over 5 times.
Nonlinear Analysis of Steel Tube Filled with Steel-Reinforced Concrete after High Temperature
Authors: Zhao Bai Dong , Liu Xiao , Chen Pei Chao
Published: December 2013

In this paper, ABAQUS finite element analysis software was used to do the following research of the steel tube filled with steel-reinforced concrete composite column. On the basis of past research, simulate axial compression under normal temperature and after the high temperature. And derivate the theoretical formula of the axial compressive bearing capacity under normal temperature and after high temperature based on the general theory. The result shows that the simulation value and the calculate value are in good agreement with each other.
Study on Vibration Characteristics of the Vehicles Wing Structure in High Temperature Environment
Authors: Wu Da Fang , Zhu Lin , Wang Yue Wu , Zhao Shou Gen , Pu Ying
Published: December 2013

During the flight of the long-range cruise missiles, aerodynamic heating can cause the temperature of the wing structure, fairing, missile body and other components to rise rapidly, along with serious structural vibrations. The thermal environment generated by aerodynamic heating significantly changes the mechanical properties of the materials and structure, including the elastic modulus, stiffness, and so on. The complex flight maneuver process will also produce high-temperature gradients, which affect the thermal stress field. Both of these impacts significantly affect the characteristics of the missile structures natural vibration. In this paper, thermal vibration joint testing was performed on two different wing structures of a high-speed missile under a thermal environment, and the vibration characteristics of the wing structure (e.g., the natural frequency) at various temperatures were obtained. The experimental results can provide a reliable basis for the safety design of the wing structure of missiles under high-speed thermal vibration conditions.
Bayesian Network Based Expert System for Tunnel Surrounding Rockmass Classification
Authors: Xie Hong Tao
Published: December 2013

Traditional surrounding rockmass classification methods have disadvantages of relative narrow scope of application, most of the time the classification result needs some modifications by geological expert and field situation. Based on the surrounding rockmass classification methods of BQ system, the Bayesian network and corresponding uncertainty reasoning principle has been introduced to develop an expert system for surrounding rockmass classification. By combining prior knowledge of domain experts with worksite data recorder, we get the posterior probability density of most nodes. The field practices proved that the expert system has good applicability.
Numerical Simulation of Thickened Insulated Siding Wall Shear Behavior
Authors: Ding Ke Wei , He Yun , Che Ya Qi , Liu Yun Lin
Published: December 2013

The siding insulated wall and The precast shear wall are two researching themes which are faced in the current development of structure construction in China .And they are tends to mature now .However, the other new problem is proposed that whether it is possible to combine them to be a single one with a new structure form, which defined as insulated shear wall.
Impact-Resistant Performance Analysis of Composite Laminates for Reinforced Concrete Beam Fixed and Hinged at Different Ends
Authors: Yang Run Lin , Zhao Li , Zhou Juan Hua
Published: December 2013

Structural members are vulnerable to be damaged under the impact loads. According to traditional design methods, the impact load is seldomly considered. However, recently this situation is changed gradually. In view of this, impact-resistant performance of a new composite protective device was analyzed. A reinforced concrete beam with composite laminates, which was fixed at one end and hinged at the other end, was studied. Totally, the four cases including the unprotected, the rigid, the flexible and the composite protective measures were considered. The protective effects of the different measures can be compared by observing the strain, the displacement, the acceleration and the impact force of the target beam. Simulation results show that the composite protective measure can improve the impact-resistant effect of the target beam significantly and its dynamic response is suppressed effectively.
Modeling and Simulation on Unidirectional Pedestrian Flow Based on Cellular Automata
Authors: Hu Qu Qiang , Song Zhi Gang
Published: December 2013

The CA-based Model of unidirectional pedestrian flow simulation is established. Model takes into account pedestrian forward, change lanes , side forward, backward , away from the dense crowd behavior. Simulation research and analyzed the relationship between pedestrian flow speed ,flow speed, flow , without moving the proportion of pedestrians and the pedestrian density in different pedestrian density. The results showed that: unidirectional pedestrian flow with the pedestrian density increases, there will be two thresholds K1 and K2. Pedestrian flow velocity will appear slight and obvious decrease after these two thresholds. Pedestrian flow traffic reaches its maximum value at K2. The proportion of unmoving pedestrians will increase and the increased amplitude increases when it reaches at the two thresholds K1 and K2.
Re-Entrant Jet Analysis of Cavitating Turbulent Flow on a Hydrofoil
Authors: Zhang Hong Ming , Zhang Li Xiang
Published: December 2013

The paper presents the re-entrant jet analysis of cavitating turbulent flow on a hydrofoil. Analysis was performed by OpenFOAM code. A mixture assumption and a finite rate mass transfer model were introduced. The finite volume method is used to solve the governing equations of the mixture model and the pressure-velocity coupling is handled via a Pressure Implicit with Splitting of Operators (PISO) procedure. The result of numerical simulation clearly explained the mechanism of re-entrant jet and quasi-periodic law of cavitating flow on a hydrofoil.
On Reduction of Stress Concentration around the Pin Hole in Turbine Discs
Authors: Shi Liang , Wang Yan Rong , Yuan Shan Hu , Wei Da Sheng
Published: December 2013

The stress concentration phenomenon around holes in rotated components is discussed. Firstly, finite element analysis of a simplified model of turbine disc flange is carried out, and then a method is developed by designing an intended-cut notch on the model to reduce the stress around the pin hole. Furthermore, two characteristic parameters which determine the configuration of the notch, namely notch depth and arc length parameter, are investigated by changing the notch dimensions. The results show that this method can reduce the stress around the hole significantly, notch depth and arc length have an important impact on the stress concentration factor (SCF), the SCF decreases with the increase of notch depth, and increasing the arc length within a critical scope results in the decrease of the SCF.
Experimental Study about Bearing Capacity and Deformation on Concrete Composite Slabs with Additional Bars
Authors: Cui Jian Hua , Weng Chuan Yang , Liu Yun Lin
Published: December 2013

Through the experiments of four concrete composite slabs under static loading to compare their flexural properties (deflection, bearing capacity, failure mode), this paper discusses the influence of composite slabs flexural behavior on different length of additional bars and sectional effective height. The results showed that they will improve the bearing capacity effectively by reasonably increasing the sectional effective height and controlling the length of additional bars.
Housing Industrialization and Steel Structure Housing
Authors: Pan Xue Qiang , Cao Lu , Wang Bei Bei
Published: December 2013

The paper introduces the housing industrialization development in the global typical countries, and expounds the advantages and characteristics of steel structure housing. The paper shows that due to the progress of science and technology, housing industrialization has led to the development of steel structure housing, and vice versa the development of steel structure housing has promoted the housing industrialization.
The Impact to the Guyed Mast Welding Earplant Joint's Wind-Induced Cumulative Fatigue Damage by Different Eliminate Proportion of Welding Residual Stress
Authors: Wang Wen Li , He Jie , Qu Wei Lian
Published: December 2013

This paper proposes a method to quantitative assess the impact of welding residual stress to structures cumulative fatigue damage. We use ANSYS finite element software to eliminate the welding temperature field and welding stress field, and by changing the load order, preheat consider we can get the welding residual stress of different eliminate proportion. Based on critical damage plane method we finish the welding earplant joint s wind-induced cumulative fatigue damage by different eliminate proportion of welding residual stress .
Pseudopotential Calculation for the Electronic Properties of TbFeO3 with Perovskite Structure
Authors: Li Jian
Published: December 2013

Electronic properties and configuration of rare-earth orthoferrites TbFeO3with perovskite-type structure was calculated using pseudo-potential method basing on density function theory. TbFeO3with ferromagnetic structure and antiferromagnetic structure are investigated. By comparing calculated values with experimental results, the antiferromagnetic structure is more stable at normal condition, and its configuration optimization results is closer to the experimental measurement. In addition, TbFeO3with antiferromagnetic structure should be a semiconductor having a band gap at the Fermi energy, while for TbFeO3with ferromagnetic structure, there is no gap at the Fermi energy.
Giant Electroresistance Induced by Electric Currents in Epitaxial Thin Films of Pr0.7Sr0.3MnO3
Authors: Liu He Yan , Zhou Liang , Li Ying , Liu Guo Dong
Published: December 2013

Electric-current induced electroresistance effect has been investigated in epitaxial Pr0.7Sr0.3MnO3thin film grown on the (100) SrTiO3substrate. A significant change ~38% in the ratio of the peak resistance at different currents with a current density up to ~3.3×103A/cm2was achieved. Such an ER effect is more remarkable in comparing with that reported in other manganite oxides with similar current densities. Compared with that of the as-grown films, the electroresistance of the post-annealed films is smaller, while the ER effect (~14%) is obtained. Although the nature behind such an electroresistance effect has not been well understood, the field tunability of the metal/insulator transition and the electroresistance effect induced by currents might be of potential for various applications such as filed effect devices.
Research on Energy Efficiency Evaluation Algorithm Based on Database System
Authors: Zhu Hiu Jie , Gao Hui Feng , Wei Chun Bo , Wang Zheng Yong
Published: December 2013

With the rapid development of urbanization,the building energy use increases rapidly, in order to guarantee the sustainable development of our country road, energy saving, low carbon, emission reduction work has become an urgent issue.Building energy consumption database is an important part of the construction of energy-saving work, In this paper, the aim is to establish the large-scale public building energy consumption database system in northeast cold area of , mainly introduced the database development tools, the choice of object oriented programming method , the system design process,treating the ground source heat pump system as the research object, this paper have had research and analysis on applicability of ground source heat pump system and established the evaluation system.
Calculation of Thermal Analysis Kinetics Using Least Mean Square Method
Authors: Liu Xue Ping , Cui Yang , Yao You Wei , Chen Guoan , Liu Zhi Shan
Published: December 2013

This paper introduce three methods for calculating thermal analysis kinetics, and represents the mathematical method Least Mean Square Method to calculate the parameters in the three methods.
Effect of the Process Parameters of Laser Cladding on Microstructure of Ni-Based Titanium Carbide
Authors: He Chang Lin , Zhang Gong , Wang Ying Ping , Zheng Lei , Chen Xian Shuai , Chen Shao Ke , Zhou Zhong He , Feng Wei
Published: December 2013

This paper gets a further study to cladding of Ni-based Titanium Carbide in the surface of die steel of 718, This paper introduces the effect of laser process parameters on the titanium carbide and nickel solid solution and cemented carbide in cladding layer; on that basis, this paper studied the effect of the different of powder paving thickness, laser power and scanning velocity and other parameters on microstructure and properties of cladding layer. By controlling the powder-bed depth, using suitable laser cladding power and scanning speed, we can get the cladding layer of compact structure, no holes or no cracks. Experiments were carried out to get suitable process parameters, and analyzed its mechanism. It has certain significance guiding to improve the laser cladding of 718 die steel quality,
Numerical Simulation of High Speed Single-Grain Cutting Using a Coupled FE-SPH Approach
Authors: Shen Rui Dong , Wang Xiu Mei , Yang Chun Hui
Published: December 2013

In this study, to simulate the grinding process for rolled homogeneous armor steel (RHA) 4043, a single-grain cutting process is modeled using a three-dimensional (3-D) numerical model, which is developed using a coupled finite element (FE) - smoothed-particle hydrodynamics (SPH) approach. The proposed numerical model is then employed to investigate the influences of grain negative rake angle (-22°, -31°, and-45°) as well as high and super-high cutting speed ranged from 100 m/s to 260 m/s in the cutting processes. The numerical results show the cutting forces are much lower and the maximum chip thickness is much larger when using a smaller grain negative rake angle.
Lightweight Design of Tanker of LPG Truck Based on Material Strength Equivalent Substitution
Authors: Zhou Bin , Ma Li , Wang Zhe , Zhang Zhong Zheng
Published: December 2013

general steel of the original tanker of LPG truck is substitute by high strength steel in order to reduce the weight of tanker. Then strength and stiffness of new tanker is calculated, the result shows that strength and stiffness of new tanker satisfies safety requirement.
Catalytic Synthesis of Benzyl Acetate by Diatomite Supported Waugh-Type (NH4)6[MnMo9O32] •8H2O
Authors: Liu Shu Heng
Published: December 2013

Take Waugh-Type (NH4)6[MnMo9O32] •8H2O absorbed on diatomite and prepared supported solid catalyst. The properties of the catalyst were studied through the synthesis of benzyl acetate. The appropriate reaction conditions were obtained by orthogonal test: mole ratio of acetic acid to benzyl alcohol was 2.5:1.0, the catalyst dosage was 1.6g, the water carrying agent toluene dosage was 2.5ml, reaction time was 150min, esterification yield was 87.4%. The catalyst are high catalytic activity and non- polluting, and could be reused.
Optimization Calibration of Engine Ignition Advance Angle Based on Engine Model
Authors: Zhang Sheng Kai , Sun Ren Yun , Yan Hao Ming , Wang Ke Ren
Published: December 2013

Based on the mean-value theorem of the engine, the mathematical models can be created for the four-stoke-cycle-CNG engine, style of YN30QNE. Furthermore, while the mean-value models set the basis for the external loading resistance model controller, the adjust-dimention-burning engine models give birth to the models, as well as the MAP figures, of the engines controlling of the advance angle of ignition. Finally what the tests show us are as follows. Firstly the advance angle of ignition does the same, as the rotating velocity increases, and on the condition of the same rotating velocity, the best suited advanced angle of ignition decreases reversely with the growing loading resistance of the engine. Secondly it not only brings us the rarely precise original MAP figures of the advance angle of ignition, but also shortens the development cycle. Lastly, in the process of the calibration, optimal functions are used to conduct the PID optimal designing for the external loading resistance controller, which makes the system converge faster, improves the efficiency of the calibration as well as optimizes the results of the calibration.
The Affection of Fasteners Load Constraint in Topology Optimization
Authors: Zhu Ji Hong , Hou JIe , Gao Huan Huan
Published: December 2013

The paper is to present the method of topology optimization with multi fasteners shear constraint. The further studies on analyzing the influence of different shear load constraint on the optimized structure shows that the constraint of shear load has great influence on the structural configuration. When the constraint is low, the load concentration is reduced while the configuration with delicate truss is lack of manufacturability.
The Design of Photoelectric Measuring System on Railway Track Parameters
Authors: Chen Guang Wei
Published: December 2013

Based on the analysis of the current railway track parameters measurement system, a digital system based on embedded processor is designed. The paper introduces the principle of the system , structure and methods. The system is still based on the deviation detection principle of three point method, using high brightness light source as a measurement point, in combination with linear CCD imaging features, completed the orbit measurement system of the digital processing, and through the network to complete the communication with PC. The photoelectric measuring system is realized in trajectory parameters of high accuracy and real time measurement; Also for the future development of tamping on railway cars plays a positive role.
Design of a High Force Voice Coil Motor
Authors: Ahn Da Hoon , Hong Dong Pyo , Gweon Dae Gab
Published: December 2013

Voice coil motor is an electromagnetic actuator widely used for motion generation. The main weakness of a voice coil motor is small force. In this paper a voice coil motor is mathematically modeled, analyzed and optimized to obtain high force. According to the optimized final designs, the performance of the voice coil motor is evaluated.
An Evaluation System of Pulsed GMAW Process
Authors: Gao Ying , Han Jing Hua , Lou Li Yan , Li Huan
Published: December 2013

A process evaluation system for pulsed gas metal arc welding (GMAW-P) based on the LabVIEW platform has been developed. This system is comprised of two modules, a simultaneous display module and a data analysis module. Using these modules, the system can not only provide a comprehensive direct viewing display of the welding electric signal and high speed camera photo, but also can analyze the characteristic parameters of the welding process. The results show that the system works properly.
Ontology Representation of Online Shopping Customers Knowledge in Enterprise Information
Authors: Li Zhen , Guo Shun Sheng , Yuan Ying Song , Sun Li Bo
Published: December 2013

The online shopping has become a regular way of shopping, enterprises should conduct in-depth mining of online shopping customers knowledge, and build customer knowledge base, so as to better meet customers needs. This paper constructs online shopping customers knowledge ontology model, and studies the knowledge representation based on the protégé environment.
The New Technology of Precision Grinding High Performance Ceramic Materials
Authors: Kang Feng Hua
Published: December 2013

This paper gives further discussions refer to the precision grinding of high performance ceramic materials through the two aspects of the Grinding Properties and depth.
Average Wage Prediction Based on Logistic Model
Authors: Wei Zheng Xi , Liang Jin Ming , Zhao Pan
Published: December 2013

In this paper, data mining technology is applied to analyze the average wage of staff and workers in urban of Sichuan Province, China. The salary data in the past 22-year is sourced from Sichuan Provincial Government to publish during 1991 to 2012. Combined with Chinese national economic-development strategy, the Logistic Prediction Model is established by our much research. The future average wage from 2013 to 2020 year of staff and workers in urban is predicted and its growth trend in the long term is pointed out. The macro analysis to predicting data from Logistic model proves the prediction method and its conclusion is of certain reference value.
Multi-Objective Control Method in Structural Stress Interval Reliability Based on Epsilon Algorithm
Authors: Sun Zuo Zhen , Meng Guang Wei , Li Feng , Ma Kai
Published: December 2013

A kind of structural stress reliability control method was presented. In this article, the interval extension of multi-objective control algorithm was applied to control the structural stress reliability. By the control of the structural interval parameters, this method has realized the goal of controlling the multiple static interval reliability indexes. To insure the accuracy of the structural reanalysis, the Epsilon algorithm was used in the process of the structural reanalysis when a wide range of modification happened in the interval parameters. This method can both get a satisfactory accuracy, and improve the speed of the reanalysis. The results of the example further proved that the proposed method can be effectively applied in the multi-objective control of the structural stress interval reliability.
Urban Environment Monitoring and Control System Design
Authors: Xin Jin , En Hu
Published: December 2013

The thesis starts with information construction of environmental monitoring management, adopts ASP.NET, C#, SQL Server technical theory system, and provides the solution to environmental monitoring management based on B/S structure. Based on the analyze of supporting system of environmental monitoring management, establish the framework of the whole system, analyze the general process of environment-condition detection, pollutants registration management as well as the test of business process, realize the monitor and management of the whole process of environmental detection, and play an important role in entirely promoting the management of urban management and urban environment management.
Alarm System for Ancient Tombs Based on ZigBee
Authors: Wang Tao , Liu Wen Bo
Published: December 2013

To avoid the criminal behavior of excavating the group of ancient tombs, this paper designs an alarm system for ancient cemetery based on ZigBee. It capture shock wave made by Luoyang shovel and explosion through the vibration, and after the corresponding signal conditioning and conversion, the ZigBee network transfers it to the control system to analysis and judge, so as to drive alarm device and achieve the effect of guard against theft, making use of ZigBee short-range wireless communications technology for data transmission, so that the system will not only significantly reduces the amount of equipment, but also makes the system placed flexibly and moves easily. The results proved that the system is used simply, fast and efficiently, which makes up the monitoring shortage of underground activity in the modern security technology, also it has a broad application prospects.
Synthesis of CuIn0.7Ga0.3Se2 Nanoparticles and its Quarternary Sputtering Target
Authors: Zhou Jun , Zhang Fu Qing , Xia Li Hong
Published: December 2013

The chalcopyrite-type of CuIn0.7Ga0.3Se2 nanoparticle was successfully prepared by mechanical alloying method (MA). The phase of the obtained powder was analyzed by x-ray diffraction (XRD), and its microstructure was analyzed by scanning electron microscope (SEM) and transmission election microscope (TEM). Subsequently, the sintering process of CIGS quarternary target was investigated. The result suggests that only CuIn0.7Ga0.3Se2 phase exist in the powder with the rotation speed of 350 r/min and 2 hours mixing time by planetary ball milling. The particles were seriously agglomerated and the size of agglomerates was about 100 nm. Finally the as-made CIGS nanoparticles were used to fabricate CIGS target through both pressureless sintering and hot pressing methods. The hot pressing was fairly effective to increase the density of CIGS target. This fabricated target can be used for magnetron-sputtering deposition of CIGS absorbers.
Valuing Wind Power Project on Renewable Electricity Whole-Sale Tariff in Power Market
Authors: Sheen J.N.
Published: December 2013

This article derives fuzzy profit models to value the wind power project. The performances of the proposed fuzzy profit models are verified by considering their application to a simulation case. The studied results are consistent with those provided by the conventional crisp models, and provide readily implemented possibility analysis tools for use in the arena of uncertain economics.
Investigation on Work Hardening Effect Generated during Dynamic Formation of Al-Based Coating on Magnesium Alloy
Authors: Wang Xiao Ming , Zhu Sheng , Feng Xue Qiang , Liu Yu Xiang
Published: December 2013

Numerical simulation of sequential collision behavior of multi-particles during dynamic formation of Al-based coating on magnesium alloy by supersonic particles deposition demonstrated that continuous tamping effect from subsequent sprayed particles improved significantly compression ratio of former deposited particle and promote effectively deformation and spread out. Analysis to morphology and microstructure of Al-based coating on magnesium alloy by SEM and TEM elicited that subsequent sprayed particles generated two effects including erosion and compaction to former deposited layer of the coating, induced formation of high density dislocation, grains refinement and re-crystallization, which played work-hardening strengthening effect and fine crystal strengthening effect to Al-Si coating.
The Knowledge Acquired by Using of Optical Methods by Strain Fields Investigation
Authors: Hagara Martin , Šimčák František , Kalina Matúš
Published: December 2013

These days are preferably used contactless optical methods for experimental investigation of strains and displacements, which give some information on whole investigated surface. In this contribution the optical systems working on electronic speckle pattern interferometry (ESPI) principle and digital image correlation (DIC) method are described. By using of ESPI and DIC methods the displacements and strains fields on chosen types of specimens are determined. Pros and cons of particular methods and influence of various factors on reached results accuracy are compared. There are also mentioned the possibilities of using of optical methods in application of devices on authors department.
Analysis of a Dynamic Response of a Car Door Impact into the Lock
Authors: Potěšil Antonín , Horník Petr , Hušek Martin
Published: December 2013

Innovative approaches to new design conceptions require at the same time application of simulation numerical methods and some physical experiments. The present paper describes preparation and implementation of both virtual and physical experiments focused on the dynamic response of a new design conception of a so-called car tailgate.
Experimental Identification of Material Properties of Piezoelectric Patch Transducer
Authors: Lašová Zuzana , Zemcik Robert
Published: December 2013

This work is focused on identification of material properties of piezoelectric patch transducers used e.g. for structural health monitoring before attaching to the substrate structure. Two experimental methods were concerned. At first two piezoelectric patches were supplied with a pair of collocated strain gauge rosettes. Both transducers were actuated with the same periodical signal. Significant difference in the results for two transducers was found, however it was claimed to be within tolerance by the producer. As an alternative method a measurement in an optical microscope was chosen. The patch was clamped at one side and actuated by a voltage signal. The displacement of the free end was captured by the microscope and processed in a graphical editor. Finally, a finite element model of the transducer was created and its material data were obtained by calibration with experimental data.
Influence of Freeze-Thaw Cycles on Mechanical Properties of Gypsum Determined Using the Impulse Excitation Method
Authors: Plachy Tomáš , Tesárek Pavel , Ťoupek Richard , Nežerka Václav , Polák Michal
Published: December 2013

Non-destructive methods for testing mechanical properties of materials spreads to many fields of investigation at present. A typical example of the use of non-destructive testing can be determination of the effect of freeze-thaw cycles on the mechanical properties of porous building materials. The great advantage of non-destructive testing, compared to destructive, is that still the same sample is tested and it excludes various negative effects such as technological indiscipline in the production of samples, different environment storage of samples prior to testing, recognition of cracks in the sample prior to testing, etc. The paper presents the development of modulus of elasticity on samples of hardened plaster according to the number of freeze-thaw cycles. Elastic moduli were determined using an impulse excitation method. For cyclic loading, the samples were saturated with water at 20 °C and tested in 8-hour cycles. Samples were removed from the water bath and placed in a freezer with a temperature lower than - 20 °C and after 8 hours they were placed again in the water bath for a period of eight hours. The temperature in the freezer was measured using platinum thermometers during the freeze-thaw cycles. The difference from 'dry' frost resistance was that the samples of hardened plaster were exposed to "wet" frost resistance, i.e. to the extreme load of the samples with the external climatic conditions.
Modified HHT Method for Vehicle Vibration Analysis in Time Domain Utilisation
Authors: Gerlici Juraj , Lack Tomáš
Published: December 2013

The analysis of mechanical systems (for example the mechanical systems of vehicles) vibration is permanently very topical. The vehicle dynamical properties are determined with the help of this analysis during a new vehicle design, or renewal of an older existing vehicle. The Eigen frequencies are characteristic for a vehicle construction. A vehicle mechanical system is excited with various types of loads in the operation and this is the reason why its individual parts oscillate. The aim of a dynamical analysis is not only to judge the influence of an excitation on the mechanical system, but also on the base of that analysis, to propose and to perform the construction changes of a vehicle for the detected negative state elimination or improvement.
Investigation of Long-Term Mechanical Response of Rubber
Authors: Heczko Jan , Kottner Radek , Fukala Lesek
Published: December 2013

This work deals with mechanical properties of rubber that is used as a damping element in modern tram wheels. Tests in simple tension, uniaxial compression, and simple shear were performed. Duration of the experiments varied from minutes to days in order to investigate permanent set and its dependence on previous loading history, especially maximum strain. Apart from measurements using the testing machine, hydraulic vise was used for measuring force at constant strain and an optical distance-measuring system was used for measuring the dimension of specimens in the loading direction after load removal. The aim of the research was to find out whether the final dimensions of specimens are the same as before loading and whether the force after return to zero strain attains zero. This knowledge is essential for reliability analysis of the resilient wheels that use the examined rubber.
Study on the Influence of Mix Design Parameters on the Properties of Self-Compacting Concrete
Authors: Wang Ji Liang , Wen Xiang Qian , Shan Jun Hong , Liu Ying
Published: December 2013

the influence of mixing amount of mineral admixture, volume content of fine and coarse aggregate have been systematical studied on the workability, mechanical properties and volume stability of self-compacting concrete. Test results showed that with the fly ash content increased, the workability of self-compacting concrete improved significantly, early compressive strength decreased, but increase rate of later strength improved remarkably, and the mixing amount of fly ash inhibited significantly the dry shrinkage of self-compacting concrete; with the volume content of coarse aggregate increased, the workability of self-compacting concrete decreased significantly, but the volume stability of self-compacting concrete improved obviously, thus the optimum volume content of coarse aggregate of self-compacting concrete was range from 0.30 to 0.34; when the volume content of fine aggregate varied at the range of 0.40~0.50, there may be little effects on the workability of self-compacting concrete, but the increase self-compacting concretes volume content could reduce obviously the dry shrinkage of self-compacting concrete. Moreover, the variation in the volume content of coarse and fine aggregate should have slight influence on the early strength of self-compacting concrete, and the influence of the volume content variety on the later strength of self-compacting concrete could be neglected eventually.
Permeability of Lightweight Aggregate Concrete with Mineral Admixture
Authors: Zheng Xiu Hua , Song Shu Jie , Zhang Yong Quan
Published: December 2013

This paper presents an experimental study on the permeability and the pore structure of lightweight concrete with fly ash, zeolite powder, or silica fume, in comparison to that of normal weight aggregate concrete. The results showed that the mineral admixtures can improve the anti-permeability performance of lightweight aggregate concrete, and mixed with compound mineral admixtures further more. The resistance to chloride-ion permeability of light weight concrete was higher than that of At the same strength grade, the anti-permeability performance of lightweight aggregate concrete is better than that of normal weight aggregate concrete. The anti-permeability performance of LC40 was similar to that of C60. Mineral admixtures can obviously improve the pore structure of lightweight aggregate concrete, the total porosity reduced while the pore size decreased.