bluuebunny/crossref_metadata_2025 huggingface dataset:
The Comparative Analysis of Gas Emissions during Mechanized MAG Welding Using Cored Wires
Authors: Mihailescu Dănuţ , Frincu Octavian , Gheonea Marius Corneliu
Published: September 2013

The use of cored wire - shielding gas (gas mixture) pair, during mechanized Metal Active Gas - MAG welding, leads to the formation of gas emissions (CO2, CO, NOx, NO, O3 etc) which is harmful for the welder’s health. The paper addresses the experimental method applied to establish the gas emissions developed during MAG welding when rutile cored wires (standard and low fume emissions) and metal powder cored wires (standard and low fume emissions) are used. Carbon dioxide and the shielding gas mixture are investigated, too. Four types of cored wires were comparatively analysed, when three wire speed values were applied. The experimental results have revealed that using rutilic cored wires and increasing the speed feed, an augmentation of CO (ppm), constant values of O2 (%), insignificant constant values of NO (ppm) and NOx (ppm) and absence of CO2 (%) are achieved. Using metal cored wires and increasing the speed feed, increase of CO (ppm), insignificant values of NO (ppm) and NOx (ppm), and constant values of CO2 (%) and O2 (%) are noticed.
Research on CNC Grinding Program of Overall End Milling Cutter
Authors: Sun Chang Fu , Wang Na Jun , Li Jian Guang
Published: September 2013

With high precision special rotary tool is widely used in automotive, mold, aerospace, machinery, electronics and other fields, the demand of manufacturing for such type and quantity of cutting tool is more and more big, lead to the demand for multi-axis CNC tool grinder which provides efficient, high quality production support for it also increasing. In terms of hardware and software multi-axis CNC tool grinder in developed countries are relatively mature, but domestic did not have enough for this research, especially for development of CNC tool grinding machine operation software system, and rarely reference data. In view of the domestic manufacturer in urgent need of independent research and development of CNC tool grinder, this article will research tool grinding automatic programming and simulation technology of CNC tool grinding machine operation software system, through analyzing the four main steps of NC grinding four-blade overall end milling cutter, parametric programming with MATLAB, and grinding trajectory data in the form of mixed programming of MATLAB and VC+ + will be post processed into NC programs, then simulation in VERICUT virtual machine tool, finally the actual grinding out overall end milling cutter.
Theoretical Research and Simulation of Grit’s Motion for Internal Ultrasonic Vibration Grinding
Authors: Zhao Bo , Li Ya Min , Bian Ping Yan
Published: September 2013

In order to better reveal the theoretical nature of internal ultrasonic grinding which is an efficient grinding technology, the characteristics of grits motion is analyzed under axial vibration and the grits kinematic equation is established. By using Matlab the single particles trajectory is simulated, then the displacement of a grit is given at any time they contact. Through the theoretical analysis and Matlab simulation, we can achieve that for axial ultrasonic vibration the influences of axial feed on the grits trajectory is too litter to be ignored. So when calculate the contact length of the grinding wheel and the work piece, the grinding wheels axial feed can be neglected. Then the contact length of the grinding wheel and the work piece is achieved. It has a significant value for simplifying the calculation of the grinding force and the analysis of internal ultrasonic grinding.
Study on the Surface Quality of Silicon Nitride Ceramics in Ultrasonic Vibration Grinding
Authors: Dong Guo Jun , Zhou Ming , Huang Shao Nan
Published: September 2013

The conventional machining method for silicon nitride ceramics has low machining efficiency, prone to cracking, chipping and other defects. In this paper, the author carried out a study on the influence of ultrasonic vibration grinding on surface quality of silicon nitride ceramic, and carried out ultrasonic vibration grinding process test for silicon nitride ceramic and conducted the analysis of influence of this machining process on surface quality with orthogonal test. The test results showed that the influence on surface roughness decreased in the order of spindle speed, feed rate, cutting depth, and amplitude of vibration.
Simulation-Based Analysis of the Gas Bearing Utilizing Traveling Waves
Authors: Li Ying Jie , Zhou Ming , Shamoto Eiji
Published: September 2013

Aerostatic bearings are utilized in a variety of precision devices to eliminate viscous friction between moving parts for realizing high accurate motion and supporting load at zero speed. However, in practice external pressurized source is necessary to realize the aerostatic bearing, which sometimes leads to difficulty in some medical and aero applications within tightly sealed containers. In order to tackle this problem, an innovative principle bearing, which utilizes traveling waves, has been proposed in previous paper. In order to theoretical analyze the principle and numerical predict the performance of the gas bearing utilizing traveling waves, a numerical model based on 2-dimenssional Navier-stocks Equations with neglecting gravitational force is developed in this paper. The equations are solved discretely by dynamically meshing the isotropic 2D model and updating the boundary conditions. It reveals that the gas film force varies with a nonzero average value that can be utilized to realize a non-contact gas bearing. The effect of driving voltage and frequency, and the bearing clearance height on the average film force is clarified by simulations. The proposed bearing design is ought to eliminate drawbacks of conventional hydrostatic bearings such as supply of external pressure source, use of compressor, and tubes while still achieving comparable static and dynamic capabilities.
High Pressure Pneumatic Control Valve Performance Test System
Authors: Pan Xu Dong , Wang Guang Lin , Shen Guo Yu , Song Rui Qi
Published: September 2013

As a pressure regulating component, pneumatic control valve has been widely used in control system. The stability of its performance not only concerns the control precision, but also has direct influence on the systems normal operation. Thus, a test on the valves characteristics before putting into use is rather important. According to analysis of testing requirements, this paper determined the overall program of this pneumatic measurement system, designed the gas-circuit, provided specialized software for measurement, and developed an automatic test system. The experimental data shows the system is with high precision and can satisfy the needs of valve test well.
Topology Optimization for the Base of Parallel Loading Device
Authors: Wang Huan Gong , Wang Li Ping , Kang Ning Min , Li Run Cheng
Published: September 2013

The base of Parallel loading device withstand the pressure of hundreds of tons, Limited by the conditions of use, All components of the device must be manual handling, so Its weight becomes very sensitive. The initial design weight of base are about 170 kg, By handling environmental constraints, four men lift is also very convenient, Therefore it's urgent to reduce weight. In this paper, a powerful modeling capabilities of UG combined ANSYS topology optimization module on the base for a topology optimization, We refer to the shape of topology optimization design of the final design of the structure. Through finite element analysis, the structural stiffness and strength to meet the design requirements, And weight decreased from about 170 kg to 120 kg, reduced by nearly 30%.
The Application of Self-Adaptive Design in Improvement of the Restoring Strand Operation Mechanism
Authors: Liu Zhang Shi
Published: September 2013

Aiming at solving the problem that the existing restoring strand operation mechanism cannot realize self-adaption to the variation of position and shape of transmission lines, a method for self-adaptive mechanism design is introduced and summarized to meliorate the mechanism. This method is effective and practical, which can be applied to most common mechanism design: first of all, analyze the structural features of the self-adaptive mechanism; secondly, establish a universal method to determine the structure type named as initial kinematic chain which contains information of the degree of freedom (DOF), the number of links and the kinematic relations between every two of them; finally, considering the features of the existing mechanism, apply the self-adaption design to realize the required mechanism by inverting the initial kinematic chain, and build models and simulations to prove that the improved mechanism does have the ability of self-adaption to the location and shape variation of transmission lines.
Modeling and Performance Simulation for a Picking Manipulator Based on Modelica
Authors: Wang Hong Jun , Huang Guo Gang , Zou Xiang Jun , Chen Yan
Published: September 2013

This paper presents a procedure and the results of structure design about a picking manipulator to be used for autonomous banana harvesting. Based on structure analysis and module partition for the picking manipulator, DriveLib model library was developed employing the virtual simulation and modeling language Modelica. A body structure model for the picking manipulator was established based on component models in DriveLib model library. Motion controls mathematic models for the picking manipulator were analyzed according to drive motor performance for the body structure, and then the partial differential equations were transformed into the ordinary differential equation easily solved by Modelica with the Laplace transform, mechanical motion simulation was realized. The validity models could provide a theoretical basis for picking banana manipulator primary design.
Additional Damping Conditions Analysis and Calculation for Exciting Force and External Load
Authors: Liu Yi Xiang , Wang Yong Mei
Published: September 2013

This paper firstly starting mechanism of vibration and noise from gear, gear noise mechanism is explained, and analyze the factors and the impact of noise on the gear reducer. Secondly, the establishment of a complete solid model of gear reducer and reducer model for finite element model, the reduction gear box gear reducer of modal analysis and finite element modal calculation, and points out the dynamic analysis of structure, size and weight factor is proportional to the reciprocal of the modal frequencies of each mode is the with the frequency is low, that is, the greater the weight. Once again, the main measure of load and control of gear noise of gear is analyzed, including the calculation, for exciting force reduction gear reducer gear load computation. The analysis and calculation are the theoretical basis of gear structure design and its performance evaluation.
Oil Film Carrying Property Research of Hydrostatic Vertical Guideway of CNC Vertical Lathe
Authors: Zhang Yan Qin , Qu Yong Zhi , Shen Zhao Yue , Wu Wen Qiang , Wu Fan Biao , Xu Lei Yang
Published: September 2013

Hydrostatic vertical guideway is the key component of modern CNC equipments which is a common lubrication form of turret. In order to improve the cutting stiffness during processing, the hydrostatic vertical guideway in sliding seat during westbank ram processing. Take count different cutting force to analysis the thickness changing of hydrostatic oil film, and then the relation between cutting force and the thickness of oil film is obtained. Based on FVM, relation model between them is established and the limited condition including cutting force is T=100KN, flow flux of each inlet is 0.52L/min, pump of constant delivery type is applied, film thickness is 0.023mm and oil cavity depth is 2mm is numerical simulated. The Hydrostatic pressure field and film thickness under different condition of hydrostatic vertical guideway is obtained. The relation model between film thickness and custom forces is validated. Whats more, the regularity of cutting force influence that impacted on film thickness is revealed. The study is of vital theoretical significance for the improvement of machining accuracy of numerical control machine and the entire CNC equipment and provides valuable theoretical basis for the design of hydrostatic guide rail in engineering practice.
Control Dominant Factors Analysis for Under-Actuated Vehicle Platoon Stability System
Authors: Zhang Rong Hui , Liu Tao , Pei Yu Long , Yang San Qiang
Published: September 2013

As a kind of flexible and under actuated systems which based on cooperative vehicle infrastructure system (CVIS), autonomous tractor-semi trailer platoon in vehicle networking can enhance the information interaction and controllability of safety. Establish the two degree of freedom model of tractor-semi trailer firstly. Then, we analysis dominant factor and equilibrium point for the under actuated physics system's stability including its coordination evolution rule. Space-time mathematical model was established based on the dynamic observation information during vehicle platoon driving. μ-Synthesis robust controller was designed to deal with real time conditions, for example, following, lane changing and obstacles avoiding. The parameters of autonomous under actuated platoon controller can be adjusted on-line by fuzzy rules. Finally, we verify robust stability and dynamic performance of autonomous under actuated platoon tracking controller by the computation simulation method.
3D Electronic Products Surface Measurement System Based on Machine Vision
Authors: Zhu Yuan Feng , Zhang Li , Li Ke Tian
Published: September 2013

Adopting high-speed line scan industrial camera, through window function of the software to capture interested areas scanning by linear structured light, through image processing algorithms and splicing technique to extract 3D feature information of the detected object surface, combined with the camera calibration technology, calculated the three-dimensional coordinates of the detected object, and real-time displayed intuitive pseudo color map, monitored picture signal and weeded out unqualified products. Compared with similar systems at home and abroad, the system are real-time pseudo color graphics display, open system and lower cost.
Research on Distributed Multi-Axis Motion Control System Based on CANopen
Authors: Yang Guang You , Tang Zong Mei , Ma Zhi Yan
Published: September 2013

The 32-bit ARM Cortex-M3 core processor Stm32f107vc which integrates two sets of bxCAN interfaces is used as hardware platform to achieve the design of hardware module and software module in this paper. Firstly, real-time multi-tasking operating system μCOS-II is ported to stm32 processor, then open source protocol stack microCANopen which is high real-time and reliable is transplanted under the μCOS-II, so a design of CANopen slave station is achieved. The CAN analyzer which is equipped with monitor trace functionality is used as CANopen master station to start the network, with three CANopen slave stations and one HMI, a distributed multi-axis motion control system based on CANopen which achieves network management and synchronous transmission of data in distributed control system is designed. On above basis, Fuji ALPHA5 Smart servo is used as executive member, modular design of reconfigurable motion control algorithm is realized, furthermore, The flexible module configuration enables the designer to develop systems conveniently according to the change of control requirement and network topology. This distributed control system not only has good real-time performance and stability, but also can reduce the complexity, enhance the flexibility of control system and save cost.
Co-Designing Method for Mechatronic System Based on Matlab and Recurdyn
Authors: Hei Mo , Fan Shi Xun , Liao Hong Bo , Fan Da Peng
Published: September 2013

In modern mechatronic system design process, how to shorten the design schedule and to ensure that the performance of the system designed to meet the indicator has been the focus of attention. This paper presents a mechatronic system co-designing method based on Matlab and Recurdyn. Takes a typical uniaxial direct drive system as example, describes the implementation process of the co-designing method. The dynamics model of direct drive system has been builded, on this basis, the co-simulation model based on Matlab and Recurdyn has been established. Simulates and analyzes time domain and frequency domain characteristics of the co-simulation model in different conditions, and compares simulation results and corresponding experiment results. Comparison results showed that: Open-loop time-frequency domain simulation results and experimental results are basically consistent, amplitude-frequency characteristics matching degree (ACMD) greater than 73%, phase frequency characteristics matching degree (PCMD) greater than 87%, time domain response matching degree (TRMD) greater than 89%. It verifies the validity and correctness of the co-designing method.
Design of Lifting Electromechanical System for Onboard X-Band Weather Radar Antenna and Data Filtering Analysis
Authors: Wei Xu Hui , Yang Bin Hua , Lu Wei Dong , Kong Ling Wen
Published: September 2013

Onboard X-Band Weather Radar and data filter prediction is one of core services of the Xinjiang meteorological emergency system. Based on installation conditions provided by IVECO trunk, the structure of X-band radar antenna, lifting height and antenna work requirements, combined with the modular design concept, this paper developed the X-band weather radar antenna dedicated lifting system. This system consists of radar antenna base platform, lifting rack rails, rollers, sprockets, cylinder etc. when working, the system can not only utilize the synchronizing control strategy to ensure the system stability but also quickly set up an antenna. Based on the design of Onboard X-band Weather radar antenna lifting electromechanical system, we developed the radar data management system. In this software, Object-oriented programming language, multi-threaded programming methods and software modularity method is utilized to design the platform architecture, GIS controls and dynamic mesh technology are used to make the radar map, and based on the principle of Kalman filtering, intelligent prediction approaches are studied. Computer numerical simulation and experimental results show that the electromechanical system developed by this paper has good performance and utilized the data filtering technology to provide the reliable method for meteorological warning.
Taguchi Robust Design of Exhaust System Based on the Parametrically Process of Parts Location
Authors: Li Teng Fei , Liu Hui Xia , Mao Yi Xue
Published: September 2013

Due to the change of car-body design, the location of exhaust systems hanger is uncertain and always fluctuates around the initial design position. So the Taguchi method is introduced to conduct exhaust systems optimal design. Firstly, the parameterization of hanger location under the grid environment was realized by combining NastranHypermesh and Isight. Then, the Taguchi robust design of the exhaust system is performed taking the hanger location as noise factors and the stiffness of hanger shock absorber as control factors. As a result, modal property and robustness of the exhaust system are improved. At last, the results of Taguchi robust design and traditional sensitivity optimization design based on the finite element method are compared, which reveals the advantage of Taguchi robust design in improving product quality.
SWCC Based Prediction Model of Equilibrium Moisture of Clay Subgrade with High Groundwater Table
Authors: Wang Bing Ru , Hu Yong Ju , Qiu Xin
Published: September 2013

To accurately calibrate the working range of equilibrium moisture of clay subgrade, according to unsaturated soil mechanics basic theories, the filter paper method was used to measure matrix suction and to establish soil-water characteristic curve (SWCC) model with reflecting function between moisture and metrics suction. The prediction method about the working range of equilibrium moisture of unsaturated clay subgrade was proposed and the model was tested. The results show that equilibrium moisture of clay subgrade out the affected range of the precipitation and evaporation is mainly controlled by the impact of groundwater. The Fredlund & Xing model can better characterize the unsaturated cohesive subgrade soil humidity and the correlation matrix suction and the model parameters possessed highly reliability. The prediction result of clay subgrade's equilibrium moisture on groundwater control area has high uniformity with experimental result. The prediction method is reasonable and reliable. The results provide new perspectives and standpoints to objectively characterize the equilibrium moisture status of unsaturated clay subgrade.
Synthesis and Electrical Properties of La Doped SrTiO3 Powders by Ultrasonic Spray Pyrolysis
Authors: Genji Ken , Myoujin Kenichi , Kodera Takayuki , Ogihara Takashi
Published: September 2013

La-doped SrTiO3 (LST) powders were synthesized by ultrasonic spray pyrolysis using an aqueous solution of a metal nitrate. SEM images showed that the as-prepared LST powders had a spherical morphology with a diameter of 1 μm. XRD patterns showed that the crystal phase of the as-prepared powders was amorphous and that the powders crystallized to the perovskite phase by calcination at 900 °C. The sintered LST body had the highest electrical conductivity at a La doping concentration (Lax) of 0.1 under a reducing atmosphere. A solid oxide fuel cell (SOFC) with La0.1Sr0.9TiO3Sm-doped CeO2 (1:9) as the anode exhibited a maximum power density of 137.8 mW/cm2 and an open circuit voltage of 1.08 V at 880 °C.
Fabrication of Nanoporous Titanium Dioxide Films Using Aerosol Deposition
Authors: Yuuki Kazuo , Sato Yuuki , Yoshikado Shinzo
Published: September 2013

Fabrication of nanoporous titanium dioxide (TiO2) films was examined for their application as the negative electrode of a dye-sensitized solar cell (DSC). Composite films were fabricated by aerosol deposition using a powder mixture of TiO2and aluminum nitride (AlN). A nanoporous structure was subsequently formed in the film by dissolving the AIN in hot water. Remarkable differences in the surface morphology of the films were observed for different mixing ratios of TiO2and AlN particles. AlN particles remained in the films, but not at the surface. The power conversion efficiency of a DSC was improved by incorporating these nanoporous TiO2films.
Dipole-Dipole Interaction Model for Oriented Attachment of BaTiO3 Nanocrystals Revisited
Authors: Yasui Kyuichi , Kato Kazumi
Published: September 2013

Numerical simulations of the oriented aggregation of BaTiO3 nanocrystals using the dipole-dipole interaction model have been performed under conditions corresponding to those used in ultrasound-assisted synthesis. The results suggest that BaTiO3 nanocrystals with a diameter of 5 nm have a spontaneous polarization that is not more than one order of magnitude lower than the value of ~0.15 C/m2 for a macroscopic BaTiO3 single crystal.
Characterization of Cu2O Thin Film Grown by Molecular Beam Epitaxy
Authors: Oshima Takumi , Nohara Masaya , Hoshina Takuya , Takeda Hiroaki , Tsurumi Takaaki
Published: September 2013

We report the growth of Cu2O thin films on glass and MgO(100) substrates by molecular beam epitaxy. Crystal orientation of Cu2O thin films on glass substrate were changed from (100) to (111) with increasing the deposition rate. The Cu2O thin films were epitaxially grown on MgO(100) substrate with an orientation relationship of Cu2O(110) // MgO(100). The film quality and electrical properties of Cu2O thin films were changed with deposition rate. The slow deposition rate resulted in high conductivity and mobility, as well as good crystallinity and orientation.
Analysis of Grain-Boundary in SrCoO3–Doped ZnO Varistors and its Electrical Characteristics
Authors: Koga Eiichi , Hogiri Masayuki , Higashi Yoshiko
Published: September 2013

The grain-boundary and its electrical characteristics in SrCoO3doped ZnO varistors were studied. The grain-boundary around ZnO-grain is probably composed of SrCoO3, and its electrical behavior is clearly different from two conventional types of Bi-and Pr-based ZnO varitors. The non-linearity and characteristic behavior could be explained by considering the n-p-n hetero-structure at the grain boundary. SrCoO3 in the grain-boundary region should play crucial roles of not only the appearance of non-liner property but also the formation of different hetero-structure from double Schottky-barrier model on conventional varistors.
TEM Analysis of the Nanostructure of Pb(Mg1/3Nb2/3)O3 Thin Films by MOD Method
Authors: Misaka Yoshihiro , Kiguchi Takanori , Sato Kazuhisa , Nishimatsu T. , Yamada Tomoaki , Usami N. , Konno Toyohiko J.
Published: September 2013

Pb (Mg1/3Nb2/3)O3(PMN) thin films were prepared by metal organic decomposition (MOD) method. The effects of Pb content and annealing temperature on the crystallinity of PMN epitaxial thin films were investigated. The 10at% Pb-excess PMN film annealed at 973 K with facing the film surface against another STO substrate have improved its crystallinity compared with those under another conditions.
Synthesis and the Luminescent Properties of Silicate NaAlSiO4:Eu2+ Phosphor Using SiO Powder as a Silica Source
Authors: Abe Takeshi , Toda Kenji , Uhematsu Kazuyoshi , Sato Mineo , Ishigaki Tadashi , Sung Kim Bong , Jo Deok Su , Masaki Takaki , Yoon Dae Ho
Published: September 2013

A yellow-emitting NaAlSiO4:Eu2+ phosphor was synthesized using SiO powder as a reducing agent and a silica source material. The emission intensity of the NaAlSiO4:Eu2+ phosphor synthesized using SiO powder is higher than that of a sample produced using a conventional silicate phosphor synthesis reaction using SiO2 powder. The ratio of non-reduced Eu3+ ions in the NaAlSiO4:Eu2+ phosphor synthesized using SiO powder was decreased by the reduction effect of SiO powder.
Preparation of Barium Titanate Grain-Oriented Ceramics by Electrophoresis Deposition Method under High Magnetic Field Using Single-Domain Nanoparticles
Authors: Wada Satoshi , Kita Tatsuya , Fujii Ichiro , Nakashima Kouichi , Takei Takahiro , Kumada Nobuhiro , Suzuki Toru , Uchikoshi Tetsuro , Sakka Yoshio , Miwa Yasunari , Kawada Shinichiro , Kimura Masahiko , Kuroiwa Yoshihiro
Published: September 2013

Barium titanate (BaTiO3, BT) grain-oriented ceramics were prepared by electrophoresis deposition (EPD) method under high magnetic field (HM-EPD) of 12 T. For this objective, the BT single-domain nanoparticles with highc/aratio of 1.008 and size of 103 nm were prepared by two-step thermal decomposition method. Using the BT nanoparticle slurry, BT nanoparticle accumulations were prepared by EPD or slipcasting (SC) methods with/without high magnetic field. After binder burnout, these accumulations were sintered at 1350 °C and it was revealed that only the BT ceramics prepared by the HM-EPD method was assigned to grain-oriented ceramics with weak preferential crystallographic orientation along [11 direction.
Microstructure Control of Porous Barium Titanate Ceramics and their Sensor Properties
Authors: Maeda Kazuki , Fujii Ichiro , Nakashima Kouichi , Fujimoto Gakuyo , Suma Kazuhiro , Sukigara Toru , Wada Satoshi
Published: September 2013

Porous barium titanate (BaTiO3, BT) ceramics were prepared by a conventional sintering method using two kinds of BT particles. The relationship between pore structure (porosity and pore size) of BT ceramics and their sensor properties was investigated. Since a piezoelectric d33 constant of BT depends largely on the pore structures, the microstructure control of porous BT ceramics is important to improve the figure-of-merit (g33/ρ). In this study, the maximal piezoelectric g33 constant value of 14.8×10-3 V·m·N-1 and the maximal g33/ρ value of 3.14×103 V·m4·N-1·g-1 were recorded at a porosity of approximately 23%.
Synthesis and Properties of Mn-Doped (Bi0.5Na0.5)TiO3 Thin Films by Chemical Solution Deposition
Authors: Makino Narimichi , Lee Bong Yeon , Moriya Makoto , Sakamoto Wataru , Iijima Takashi , Yogo Toshinobu
Published: September 2013

Lead-free ferroelectric (Bi0.5Na0.5)TiO3(BNT) thin films were prepared by chemical solution deposition. BNT and Mn-doped BNT precursor thin films crystallized in the perovskite single phase at 700 °C on Pt/TiOx/SiO2/Si substrates. The leakage current density of the perovskite BNT films, especially in the high applied field region, was reduced by doping with a small amount of Mn. Also, Mn doping markedly improved the ferroelectric properties of the films. 0.5 and 1.0 mol% Mn-doped BNT thin films exhibited well-shaped ferroelectric polarization (P) electric field (E) hysteresis loops at room temperature. Furthermore, the 1 mol% Mn-doped BNT films showed a typical field-induced strain loop, and the effectived33values were estimated to be about 60 pm/V.
Development of Modified Viscoelastic Solution with Magnetic Nanoparticles – Potential Method for Targeted Treatment of Chondral Injuries
Authors: Marinescu Rodica , Laptoiu Dan , Antoniac Iulian , Petcu Cristian
Published: September 2013

Intra-articular treatments offer the advantage of achieving high active substance concentrations at the site of cartilage lesion. One problem with these drugs is that of low remanence. A method to prolong the survival time of substance inside the joint may improve the cartilage repair and patient symptoms. Targeted therapy aims to optimize the delivery of these drugs set in a solution of magnetic nanoparticles, by injection into the knee joint, in order to increase the residence time of active substances through the application of high magnetic field gradients in the joint area by using extracorporeal magnets. Synthesized magnetic nanoparticles, which were covered by layer-by-layer method in consecutive layers of protection, are stable and retain their character and magnetic-polymer composites features required to be used for their intended purpose. FTIR analysis demonstrated the presence of iron salts in the synthesized ferrofluid, and of the characteristic groups of polymer coating which demonstrated that the technique of embedding in polymer layers by layer-by-layer method is viable.
The Influence of Classical and Modern Manufacturing Technologies on the Properties of Metal Dental Bridges
Authors: Cotrut Mihai Cosmin , Ciuca Sorin , Miculescu Florin , Antoniac Iulian , Tarcolea Mihai , Vrânceanu Maria-Diana
Published: September 2013

This paper aims to characterize two dental bridges made from Co-Cr alloy, the first one obtained by the conventional method (casting) and the second one by Selective Laser Sintering technique (SLS). The elemental composition, microstructure, hardness and corrosion behavior in artificial saliva were investigated, allowing a parallel analysis of this two samples obtained with the two methods mentioned above.
Numerical Analyses of Stresses and Strains in Bone – Implant Assembly
Authors: Comăneanu Raluca Monica , Barbu Horia Mihail , Vlăsceanu Daniel , Tarcolea Mihai
Published: September 2013

Numerous clinical observations performed on patients who have achieved dental restorations on implants drew attention to the risk of immediate or late complications. The most common late complications are lost of implant components and fracture of implant. While loss of screw only produce patient discomfort, implant fracture lead to more serious complications and subsequent treatment is extremely difficult. The causes of these complications are static mechanical failure of the implant system and overloading of the assembly [1]. The main function of dental implants is to transfer the load to the surrounding biological tissues. Therefore, the first objective of functional design is to dissipate and distribute biomechanical loads, in order to optimize function on prosthesis built on implants.
Corrosion Behavior of Ti6Al4V Coated with SiOx by PECVD Technology
Authors: Togan Valentin-Cristian , Ionita Gheorghe , Antoniac Iulian
Published: September 2013

This paper aims to present the mechanism of PECVD SiOx coating thin layer technology on biomaterials, such as Ti and its alloys, with reference to the available literature. The thin organosilan coating surface will be analyzed by SEM technique and the corrosion behavior by EIS technique. The study shows that plasma-assisted fabrication allows us to prepare dense, homogeneous and high adherent coatings and thereby, will improve the corrosion resistance.
Surface Characterization of Some CoCrMo Dental Alloys
Authors: Bortun Cristina , Ghiban Brandusa , Ghiban Nicolae
Published: September 2013

The removable partial dentures are made of alloys from CoCrMo system. This survey work paper considers various commercial CoCrMo alloys that were investigated in terms of surface behavior through different processing methods, respectively: sand blasting, grinding, milling, smoothing and polishing, procedures applied in accordance with the necessary standards for prostheses processing in dental labors, regarding their final trimming. Alloys behavior highlighting was performed by macrostructural investigations carried out at stereomicroscope. In the end an alloy hierarchy was achieved according to the method in which the main macrostructural aspects were highlighted.
Correlation between Materials, Design and Clinical Issues in the Case of Associated Use of Different Stainless Steels as Implant Materials
Authors: Ionescu Razvan , Mardare Mihai , Dorobantu Aurel , Vermesan Stefan , Marinescu Elena , Saban Rami , Antoniac Iulian , Ciocan Danut Nicolae , Ceausu Mihail
Published: September 2013

Metallic implants for ostheosynthesis are used for temporary replacement of the the original functions and to accelerate the bone consolidation after fracture. Stainless steel is frequently used for bone fracture fixation in spite of its sensitivity to corrosion in aggressive environments such as human body 1. This study is focused on the effect of associated use of various metallic implants for osteosynthesis and the occurrence of local adverse reactions as a tissue response. Once the degradation process occurs metal ions are released and are held responsible for these undesirable effects. This was the main motivation of starting a comprehensive study which involved the clinical data of patients who underwent such surgery, analysis of tissues around the implants and also investigation of metallic explants through microscopy techniques.
In Situ Generation of Polyaniline inside Zeolite Pores for Retention of Ions and for Controlled Drug Delivery
Authors: Nechifor Aurelia Cristina , Ivan Alexandrina , Voicu Stefan  Ioan , Danciulescu Valeriu , Trusca Roxana
Published: September 2013

In order to improve the capabilities of zeolites for biomedical applications, new composite materials based on polyaniline in-situ generated inside zeolite pores were developed. As precursors for polyaniline several monomers (like aniline and p-phnylenediamine) were used and different oxidant systems (like ammonium peroxodisulphate/HCl, sodium vanadate/ethylic alcohol) were studied and were used for the separation of different biological interest ions and release of antibiotics.
Experimental Study on Dynamic Characteristic of Pipeline Flow-Meter System
Authors: Zhao Jian , Yu Ming , Zhang Ling Li , Wang Wen Jin , Zhang Zhi Qiang
Published: September 2013

In order to provide high precise data for urban natural gas pipeline network dynamic modification and to diagnose the urban natural gas pipeline network fault, the dynamic characteristic of the flow-meter system, which is the main component of a natural gas pipeline network, has to be obtained precisely. The experimental modal parameters identification method base on the modal theories is proposed to substitute for the finite element method to identify the modal parameters of the flow-meter System. Multiple-point exciting by a hammer and single-point collecting by acceleration sensor can obtain testing data of the flow-meter System. The initial frequency and damping ratio of the flow-meter System can be distinguished out base on the testing impulse respond functions data. According to these modal parameters, the reasons of its faults under a certain working condition can be analyzed specifically. Simultaneously, the accuracy and reliability of this parameter identification method can be inspected on experiment.
Analysis of Torsion Stiffness of Flexible Pivot Bearing with Radial Array Rectangular Section
Authors: Liu Chun Jie , Wu X.Q. , Gan W.M. , Chen Zhi Wei
Published: September 2013

Flexible pivot bearing, a kind of precision elastic components, can provide necessary angular displacement within limited range. The torsion stiffness of the bearing, as the most important performance specification, is studied in the paper. The analytical expression (for array numberNand) of the torsion stiffness of the flexible pivot bearing with rectangular section is deduced by using static equilibrium theory. The constituent parts and physical meaning of the expression are discussed. The accuracy and applicability of the deduced expression are investigated in comparison with other equations in references. A finite element model is built accurately. Simulation of the flexible bearing (N=4) is carried out to compare the FEM solution with that obtained by the derived expression. The results show that the deduced equation is applicable to allNradial array flexible pivot bearing with rectangular section, and the difference of the stiffness value is about 7% comparing with that calculated by simulation method.
Study on Expert Decicion System for Spraying of Trellis Crop
Authors: Yu Yong Hai , Zhang Rui Hong , Cheng Bin , Ren Hai Liang
Published: September 2013

Bases on accurate spraying of the trellis crop, the expert decision-making technology was used to provide the decision support. The intelligent decision support system was combined with accurate spraying technology of pesticides. According to the differences of relevant factor of accurate spraying, the expert decision-making system of job parameters of trellis spraying machine was researched and set up. And systematic target, system expansion and system architecture were analyzed. Through C4.5 algorithm, the expert decision-making system was to decide if the trellis crop was sprayed under different climatic conditions, and the decision tree of spraying was constructed. It provided intelligent decision support to accurate spraying.
Study on Development Strategy of Third Party Logistics Based on Electronic Commercial Environment
Authors: Sheng Qiu Sheng
Published: September 2013

Mid-20th century, with the scale of production and circulation of commodities have been expanding, the status and role of logistics has become more evident. At the same time the rise of e-commerce logistics and development of new demand, third-party logistics development as the development of the logistics industry has become an important form of specialized logistics, but also a prerequisite for development of electronic commerce. The objective of social and business requirements, the third-party logistics is increasingly becoming the mainstream of logistics development, known as the 21st century "gold industry." In this paper, the theory of third-party logistics and research-based, combine the first e-commerce development environment, described the development of electronic commerce on the impact of a third party logistics, and third-party logistics environment was the development of micro, meson and macro for analysis, followed by third-party logistics system, proposed comprehensive third party logistics capability evaluation system design principles, according to third-party logistics enterprise's comprehensive ability to evaluate the impact of factors, ability to set a comprehensive evaluation of the indicators, building the ability of third party logistics enterprise's comprehensive evaluation system, respectively, from service capabilities, relationship skills and the aspects of the internal capacity of the comprehensive capacity of third party logistics evaluation, then the use of AHP and fuzzy assessment method on simulated third-party logistics company comprehensive assessment, and evaluation results were analyzed. Finally, according to analysis of the results of the evaluation, and drawing on advanced domestic and international experience of the Third Party Logistics, e-commerce environment, third party logistics proposed the development of countermeasures and suggestions: to strengthen the construction of third-party logistics information, and promote third-party logistics and supply chain integration, and enhance internal capabilities.
Study on International References of High-End Equipment Manufacture Industry
Authors: Gong En Hua
Published: September 2013

Strategic emerging industry development has important relations with national economic security and strategic changing. One of the most important national economic developments is training and developing strategic emerging industry. Tax revenue is very important to developing emerging industry, which cant be replaced by other measures. But, the emerging industry is obstructed by the national current tax policies. And some tax policies which used to encourage emerging industry also have shortages. In this paper, we have summarized developed countries tax policies which used to encourage strategic new-type industry efficiently. On the basis of analysis, we have concluded some proposals about constructing our countrys strategic new-type industry tax policies. And all the proposals are focused on such aspects as homegrown innovation, training market and absorbing talented people.
Ergonomic Analysis of Multi-Function Forest Fire Helmet
Authors: Yang Hong Ze , Li Bo , Wu Ya Nan , Li Bin
Published: September 2013

The ergonomic design of forest fire helmet is closely related to its safety performance. In order to improve the performance of forest fire helmet, three representative forest fire helmets are evaluated from the shape, material, safety, comfort and other aspects and analyzed according to the firemens usage condition. Some suggestions for helmet design, such as using suspension system, installing height adjuster, using adjustable goggles with peripheral knobs and decomposition using helmets, goggles and masks, are proposed, which provide a referential technical guidance for the design of forest fire helmets in the future.
Development of Plastic Zones during the Thermal Cycle of Welding
Authors: Al Ali Mohamad , Tomko Michal , Demjan Ivo
Published: September 2013

The high temperatures induced during the welding process cause transient thermal stresses and non-continuous plastic strains around the weld. Uneven heating and cooling processes together with these plastic strains result in residual (welding) stresses, [1]. This paper deals with the development of plastic zones, related to welding stresses and their effects on the bearing capacity from a Civil-engineering perspective.
Local Tribological Characteristics of Steel Sheets for Microforming
Authors: Evin Emil , Tomáš Miroslav , Výrostek Marek , Semjon Vladimír
Published: September 2013

The die radius represents the important local part of drawing die due to transferring contact loading under deep drawing. Within the experiments local contact pressure on die radius was researched using numerical simulation of strip drawn test and micro deep-drawing. Experimental research of strip drawn test was done using coatings with different alloying – under alloyed, optimal and slightly pre alloyed. Alloying level was evaluated by phase composition and % Fe in coating. Presented coatings were created on IF steel sheet DX54D. Experimental results of strip drawn test were used to verify strip-drawn test numerical simulation. Based on numerical simulation results, contact pressure on drawing die radius at deep drawing of cups Ø 50 mm and Ø 15 mm were observed.
Strain Measurement in Local Volume by Non-Contact Videoextensometric Technique on Ultra High Strength Steels
Authors: Hlebová Stanislava , Ambriško Ľubomír , Pešek Ladislav
Published: September 2013

The paper presents the results of strain measurement using two methods: videoextensometry (ME46) and digital image correlation (DIC)-ARAMIS. ME46 - allows measuring and monitoring the major and minor strain on a planar surface of a loaded object [1]. Experimental equipment uses a CCD camera for monitoring the process. The software calculates the displacements of contrast dots and subsequently the strain components are obtained. Another method for non-contact measurements is DIC technique; the measurements are done using three-dimensional image correlation system. The system uses two digital high-speed cameras providing a synchronized stereo view of the specimen where speckles are arranged on the surface. The results show the complete strain field during the tests, including details of the strain field when necking develops prior to the failure [2]. Experimental results obtained on ultra high strength automotive steels DP 1000 and 1400M grades during static tensile test are presented in the paper. The outputs of both are deformation maps. Advantages and disadvantages of both methods are compared.
Mechanical Properties of Porous Si3N4 Ceramics
Authors: Kašiarová Monika , Vilčeková Zuzana , Bodišová Katarína , Domanická Magdaléna , Hnatko Miroslav , Dusza Ján , Šajgalík Pavol , Gromošová Silvia
Published: September 2013

Mechanical properties of porous silicon nitride prepared by two different processing routes have been studied. Depth sensing methods was used to measure the hardness and elastic modulus of experimental materials. The results were compared with the hardness and elastic modulus of trabecular bone in order to find out porous ceramics with properties close to that of trabecular bone. Material prepared by infiltration of polyurethane sponge exhibited properties close to the properties of bone and it is the potential material for further investigation in the bioapplication field.
The Effect of the Polyamide Reinforcement on Mechanical Properties of Fluorocarbon Rubbers Exposed in Aggressive Environment
Authors: Romelczyk-Baishya Barbara , Brynk Tomasz , Jurczyk-Kowalska Magdalena , Pakiela Zbigniew
Published: September 2013

The aim of presented study was to select a proper material for caterpillar application in mobile robots. The fluorocarbon rubbers were chosen for investigation. The samples hardness of 40 and 50 Sh⁰A either without or with polyamide reinforcement were prepared. The uniaxial tensile tests on mini-samples were carried out. The tests were performed on virgin samples as well as on previously exposed for one hour in aggressive liquids. The changes of the surface before and after the exposition were observed via SEM. The relation between the surface changes and the mechanical properties were described
Experimental and Numerical Analysis of Local Mechanical Properties of Drawn Part
Authors: Slota Ján , Jurčišin Miroslav , Spišák Emil
Published: September 2013

In this study, numerical and experimental results of deep drawing process were compared. Drawn part, used in automotive industry was drawn and measured using ARGUS measurement system, which works on a digital image correlation method (DIC). In order to optimize and verify accuracy of a numerical simulation results, this process was modeled in two codes which work on principle of the finite element method (FEM). Two types of FEM codes were used. Code which works on base of both, implicit and explicit time integration scheme, were used for calculation. Results were compared and discussed.