bluuebunny/crossref_metadata_2025 huggingface dataset:
Metals Identification from Instrumented Spherical Indentation Testing
Authors: Beghini M. , Bertini L. , Bosio L. , Fontanari V. , Monelli B.D.
Published: July 2013

A new integrated system consisting of a testing machine, denominated Diaptometro, and of an algorithm for metallic materials identification via instrumented spherical indentation testing is presented. The identification is carried out by analyzing the experimental load – penetration depth curve ( curve) from shallow indentation tests, thus preventing any contact condition effects in the material properties estimation. Accuracy in the experimental data collecting and the curve representation were recognized to be the key factors at the basis of reliable and accurate estimations. A new equipment with accuracies of 0.075% and 0.1% for the penetration depth and indentation load respectively was specifically built-up, whereas a four-terms power expansion is proposed for modeling the curve in the identification procedure. Experimental validation campaigns confirm the effectiveness of the adopted solutions.
Research on the Nondestructive Detection Technologies for Japanese Abandoned Chemical Weapons in China
Authors: Yao Zong Zhong , Wang Xin Ming , Guan Ying Qiang , Wang Ming Bo , Rao Gang
Published: July 2013

This article mainly introduces the nondestructive detection technologies for Japanese abandoned chemical weapons (JACWs) in China. The aim, task and technical requirements of the nondestructive detection for JACWs are discussed in detail. Practical methods and procedure of JACWs nondestructive detection are given by compared and confirmed with some different geophysical exploring technologies. Two key nondestructive detection technologies, the magnetic exploring method and the usage of metal detector, are discussed in details. In the practice of JACWs nondestructive detection, it is proved that these two methods and procedures have advantages such as high efficiency, low risk and low cost.
The Characterization of Web Offset Equipment Based on the Measurement of Chromaticity
Authors: Zhu Yong Shuang , Xu Xiang Yang , Wang Li Jie
Published: July 2013

t would be a large effort to use traditional methods of calibration procedures for Web Offset Press equipments. In this paper we proposed a convenient process calibration, which will not only guarantee the product quality meeting the ISO standards, but also save financial and material resources. Firstly, the measurements for determining the best ink thickness in Web Offset Press are discussed. The chromaticity values on solid fields with corresponding combination of paper and ink required by ISO Standards were achieved. Through a optimization process for gray balance, the printed tone values were adjusted to meet the requirements of ISO Standards. Finally several standardized test targets on sampled sheets ware measured, then the ICC profiles were created. This paper proposed an innovative process calibration, therefor using methods of chromaticity measurement, characterization of Web Offset Press can be put to effect to optimize printing processes.
The Analysis for Series Mode Noise Suppression in Measuring Equipment Calibration
Authors: Niu Man Ke , Yang Bao Qiang , Lei Zheng Wei
Published: July 2013

The application of a variety of high-tech equipment, greatly improve the execute effectiveness of the equipment. It plays a decisive role that internal parameters of the device is accurate or not, for the normal function used of these complex instrument systems. The importance of maintenance and calibration process for the test equipments accuracy must be reliable and accurate is increasingly obvious. The series mode noise suppression in equipment measurement and testing process is often encountered and must be solved in related field.
Evaluation of Measurement Uncertainty for Water Content Tests in Soil Samples
Authors: Gao Zhi Qing , Shen Nai Qi , Li Xu , Shu Zong Yun
Published: July 2013

Measurement uncertainty in the water content test for soil samples is an index for evaluating the reliability of the experiment. It affects the accuracy of some parameters such as porosity and saturation, which are derived from water content. According to the requirements of the standard JJF 1059-1999 Uncertainty Evaluation and Denotation of the Measurement Results, the uncertainty for the measurement results of the water content in soil samples was evaluated. Concerning the characteristics of the water content determination in soil samples, a pail of soil sample was taken as specimen due to its relative homogeneity. The factors affecting the measurement accuracy were discussed. The result shows that the expanded uncertainty of measurement results of the water content in soil samples was 1.6% under the proposed testing conditions.
On the Time Dependency of the Chloride Diffusion in High Performance Concrete
Authors: Chen Zheng , Zhao Xi Bin , Yuan Yan Hua , Wang Zhong Hua , Yang Lu Feng , Jiang Qiong Ming
Published: July 2013

The chloride diffusion coefficient of concrete is time dependent. The high performance concrete (HPC) was prepared and the specimens were tested by ASTM C1202 and the durability of HPC in long period is analyzed with the time dependency of diffusion in this paper. The results show that the chloride diffusion coefficients of the HPC with only fly ash are large than those of the HPC with multi-admixtures, but the attenuation of the chloride diffusion coefficients of the formers are faster than the latters. The analysis results show that the chloride concentrations in concrete is over estimated when time-dependence of chloride diffusion is not considered, and the durability of concrete in long period is determined by both chloride diffusion coefficient and age factor.
Preparation of Titania Nanorod Arrays by Hydrothermal Method
Authors: Hou Ji Ran
Published: July 2013

TiO2 nanorod arrays grown on FTO (fluorine-doped tin oxide) substrate were prepared in aqueuous solution of hydrochloric acid (HCl) and tetrabutyl titanate (C16H36O4Ti) using hydrothermal method. TiO2 nanorod arrays with different morphologies were obtained by systematically changing preparation conditions, including reaction temperature, reaction time, solution pH value, and concentrations of the reactants in the solution. Both morphology and crystalline structure of the samples were characterized. The prepared TiO2 nanorod arrays were used to assemble dye-sensitized solar cells, whose performances were also presented.
Hot Deformation Behavior of Multi-Size Al2O3 Particles Dispersion Strengthened Copper Base Composite
Authors: Yang Xue Rui , Tian Bao Hong , Zhang Yi , Liu Yong
Published: July 2013

The multi-size Al2O3 particles dispersion strengthened copper base composite (i.e. Al2O3/Cu-0.6%Al2O3 composite) was prepared by the vacuum hot-press sintering-internal oxidizing method. The hot deformation behavior of Al2O3/Cu-0.6%Al2O3 composite was investigated by the isothermal compression tests at the temperature range from 600°C to 950°C and strain rates of 0.001 s-1 and 1s-1 respectively with a Gleeble-1500D thermal simulator system. The results show that the flow stress-strain curves of Al2O3/Cu-0.6%Al2O3 composites indicate the softening mechanism of recrystallization. The flow stress increases with the deformation strain increasing, then decreases and tends to be steady. The hot deformation activation energy is calculated as 116.46 kJ/mol for the Al2O3/Cu-0.6%Al2O3 composite. The strain-stress constitutive equation is established on the basis of above results.
Wear Properties of Cast Aluminium Alloy 6061 Reinforced with Nanosilicon Carbide/Copper Hybrid Particles
Authors: Li Xiao Dan , Yin Hai Jun , Ma Jun Ping
Published: July 2013

Aluminium alloy 6061(AA6061) matrix composites were produced successfully by the stir casting method after a novel pre-treatment with reinforcements. The wear properties of composites were investigated. The results show that: the nanosilicon carbide (SiC) particles were embedded in solid copper (Cu) particles uniformly after 24 h of high-energy ball milling, and the hybrid reinforced particles uniformly dispersed in the Al matrix; The wear rate and the friction coefficient of the composites under various loads decreased as the reinforcements weight increased from 0.2% to 0.4%.
Microstructural Stability of a Single Crystal Superalloy DD10 under Stressed and Un-Stressed Thermal Exposure at 980 °C
Authors: Chen Jing Yang , Liu Li Jun , Li Xiang Hui , Xue Ming , Cao La Mei
Published: July 2013

The effects of applied tensile stress on the microstructural stability of a third generation single crystal superalloy DD10 have been investigated under stressed and un-stressed thermal exposure at 980 °C. The results indicated that μ phase precipitated in the dendrite core after both stressed and un-stressed thermal exposure at 980 °C for 450 h. The μ phase formation, γ′ coarsening and rafting processes were promoted by the applied tensile stress. However, the precipitation of μ phase was not sensitive to the magnitude of applied tensile stress. Meanwhile, the applied tensile stress did not affect the type and morphology of the topologically close packed (TCP) phase. It is suggested that the interaction of the applied tensile stress and the misfit stress decreased the lattice misfit between μ phase and γ matrix and promoted the formation of μ phase.
Effect of Processing Parameters on Porosity and Bonding Strength in Supersonic Particles Deposition of Al-Si Alloy
Authors: Zhu Sheng , Liu Yu Xiang , Wang Xiao Ming , Han Guo Feng
Published: July 2013

Effect of Supersonic Particles Deposition processing parameters on porosity and bonding strength of Al-Si coating on the surface of ZM5 Magnesium alloy was studied. The result shows that the porosity rates of Al-Si coating are all below 0.6% and the bonding strength is all above 35MPa. With air pressure increasing, the porosity of Al-Si coating reduces to below 0.3% and the bonding strength increases to above 40MPa. With spray distance increasing, the average percent voids of Al-Si coating tends to increase and the bonding strength is better between 160mm and 200mm. The minimum porosity and the maximal bonding strength of the coating can be reached when the speed of feeding powders is at 6r/s.
A Method of Improving Signal Capture Ability of Digital Oscilloscope
Authors: Jiang Jun , Tian Shu Lin
Published: July 2013

Signal capture is one of the hot spots in electronic test. As the representative of testing instrument, the signal capture ability of digital oscilloscope is normally judged by the waveform capture rate. Unilaterally improving signal acquisition ability whereas ignoring the improvement of waveform imaging mechanism and display effect can not increase the oscilloscopes waveform capture rate in real sense. Aiming at better ability of signal acquisition and waveform display effect of oscilloscope, this paper is committed to analyzing the improved structure of oscilloscope and conducting the real-time waveform imaging with hardware coprocessor array, and then studying the imaging mechanism of special 3D waveform and the impact of waveform display on waveform capture rate. In this way, the signal capture ability of oscilloscope is greatly improved and the effective waveform capture rate as high as 1,000,000 wfms/s is realized.
Finite Element Thermal Analysis on Heat Transfer Performance of Rectangular Micro – Groove Flat Heat Pipe
Authors: Liu Yi Bing
Published: July 2013

Having fully considered the influence of gas-liquid interfacial friction on the heat transfer characteristics of heat pipe within the channel, the mathematical model of the flow and heat transfer process in the Rectangular Micro-groove flat heat pipe is established. The simulation is performed by using thermal analysis software ANSYS. The iterative computation values of the center point temperature of the heat pipe surface being compared with the simulation results, the error is only 5.27% and the two are basically the same values, which shows that the mathematical model has a guiding significance on the analysis of heat pipe theory.
Simulation Analysis of a New Type of Engine Fluid Hydraulic Mount’s Characteristic in Isolating Vibration
Authors: Yang Hang Xu , Liu Dong Mei
Published: July 2013

Based on analyzing the vibration isolating characteristic and existence problems of the traditional ER-Fluid mount, this paper designed a new ER-Fluid mount with ring orifice and then built its mechanics and mathematical model. Carried on the simulation computation to it by Matlab/Simulink and studied the vibration isolating characteristic of ER-Fluid mount in changing design parameter of the ring orifice, finally provide a theory basis for optimizing structures of ER-Fluid mount in future.
The Maintenance Decision-Making for Long-Term Reserved Equipment Based on the Failure Data
Authors: Xu Ying , Su Jing Jing , Yang Jun
Published: July 2013

A method is to be put forward to make the maintenance decision for long-term reserved equipment. The schemes of health management is conceived according to the characteristics of the long-term reserved equipment. Then, it is studied how to define the equipment life distributing by failure data. The method is researched to make the maintenance decision based on the store life rule of long-term reserved equipment. The long-term reserved equipment health management platform is designed. The feasibility of this method is demonstrated by an example. It has some reference value towards the health management of the long-term reserved equipment.
Microstructures and Electrochemical Hydrogen Storage Properties of La0.7Ce0.3Ni3.83Mn0.43Co0.25-xAl0.26Cu0.48(Fe0.43B0.57)x Alloys
Authors: Zhou Yu , Peng Xian Yun , Liu Bao Zhong
Published: July 2013

Microstructures and electrochemical characteristics of La0.7Ce0.3Ni3.83Mn0.43Co0.25-x Al0.26Cu0.48(Fe0.43B0.57)x hydrogen storage alloys have been investigated. XRD results indicate that La0.7Ce0.3Ni3.83Mn0.43Co0.25-xAl0.26Cu0.48 alloy is single LiNi5 phase, and the alloys containing Fe0.43B0.57 are composed of LaNi5 matrix phase and La3Ni13B2 secondary phase, and the abundance of the secondary phase gradually increases with increasing Fe0.43B0.57 content. Maximum discharge capacity of the alloy electrodes monotonically decreases from 311.2 mAh/g (x = 0) to 289.6 mAh/g (x = 0.20). High-rate dischargeability at the discharge current density of 1200 mA/g first increases from 53.1% (x = 0) to 64.0% (x = 0.15), and then decreases to 56.5% (x = 0.20).
Limited Irrigation System of Spring Maize in a Semi-Arid Area of Northeast China
Authors: Yin Guang Hua , Li Wen Hui , Gu Jian , Hao Liang , Liu Zuo Xin
Published: July 2013

To improve the spring maizes water use efficiency (WUE) in a semi-arid of northeast, the research of limited supplementary irrigation system was carried out. It turned out that the increased production effects in the same amount of irrigation during single irrigation stage, filling stage was best, tasseling stage was better, jointing stage was good in the precipitation conditions of experiment period. The yield effects were different in the same amount of irrigation during two stages of equivalent for irrigation. It was best in tasseling stage and filling stage. It was better in the jointing stage and filling stage. And it was good in the jointing stage and tasseling stage. The yield effects during three stages of equivalent for irrigation was next to the irrigation of tasseling stage and filling stage, It was better than the irrigation of jointing stage and filling stage. Irrigation quota was 675 m3hm-2, irrigation was in filling stage, the amount was 675 m3hm-2.Keyword: spring maize; limited supplementary irrigation; production; water consumption; water use efficiency.
Interaction of Human-Like Collagen with Copper (II): Effect on Thermal Characteristics
Authors: Yu Yuan Yan
Published: July 2013

This work describes the aqueous-solution technique preparation and characterization of the complex between human-like collagen and copper (II). Pure human-like collagen and the copper complex were characterized by thermo gravimetric (TG) and differential scanning calorimetry (DSC) analysis. The TG curves and DSC data reveal the significant thermal differences between pure protein and the copper complex, demonstrating the formation of a new chemical compound, which is different from the free HLC and with more stable thermodynamic properties.
An Analysis on Parametric Design of Sports Building Structural Form
Authors: Gao Bo , Dong Yu , Liu De Ming
Published: July 2013

With computer technology contentiously improving, parametric design has been playing much more important role in architectural design. Parametric Design, as a design method and a tool arisen with information age, is the most recent trend in architecture. Parametric design tool improvements and wide application options has undoubtedly motivated building structural design and brought up more complex architectural works, especially on nonlinear structures. Sports buildings, due to their special functions, it calls for structures that provide large span. Therefore, there are many technical requirements in the design of sports buildings. Traditionally, sports building form is limited by structural calculation. With improved computer technology, especially parametric design tools, sports building forms become more diversified, complex and nonlinear. Parametric design helps with the dynamic interaction between architects and heir work, consequently achieves quick design and dynamic adjustments of complex structures, simplifies the design process, and finally provides more efficient and direct design method for sports building design.
The Design of Optical Switch for One-Dimension Photonic Crystal Constructed with TiO2 and Liquid Crystal
Authors: Luo Cai Xiu , Xie Ying Mao
Published: July 2013

A photonic crystal optical switch based on the electric field control character of the liquid crystal (LC) is proposed and investigated numerically. With the transfer matrix method, it is demonstrated that the band gap appears shifted by varying the angle θ which was between the electric field and the vertical incident light and ranged from 0° to 90°, and the transmission of the 1550nm communication wavelength as the angle θ changes is discussed. It is found that the proposed optical switch is achieved by con controlling on-off of the extra electric field.
Analysis of Wind Power Industry and Construction of New Industrial Chain Model
Authors: Wu Yun Na , Li Xin Yun , Gao Min
Published: July 2013

In recent years, wind power industry has developed rapidly, making it a major development area in new energy industry. However, the development of Chinas wind power industry still faces a lot of bottleneck. To solve the problems, this article will introduce KSF (Key Success Factors) and other related theories to the construction of industrial chain model. With the combination of global strategic objectives, analyze and determine the critical success factors, which impact the development of our wind power industry, through KSF and matrix discrimination, and refine them to specific evaluation criteria and index, according to their performance, thus forming a comprehensive evaluation system for real-time monitoring and adjustment, and construct a new industrial chain model on this basis.
The Modular Design for the Asynchronous Motor Rotating Speed Measurement Based on Slip Signal Detection
Authors: Zhao Xiao Li
Published: July 2013

Motor is important industrial production equipment, and its performance will directly affect the running of production machinery. An advanced comprehensive test system for a large enterprise is essential. In order to accurately detect the speed control of asynchronous motor property and take full account of advanced, practical, reliable and cost-effective, this paper offers a method to get the speed of an asynchronous motor by measuring the frequency of its slip, and to implement the solution in a module.
Analysis of Thyristor Switched Three-Phase Capacitor
Authors: Yan Tian Xiang , Xie Xiao Lan , Chen Xin Yu , Niu Peng
Published: July 2013

it can limit the reactive power transmission to improve the voltage quality of power grid by installing parallel capacitors for reactive power compensation. But due to presence of transient transition process during power capacitors switching, it will seriously affect the service life of power capacitors and the safe operation of power system if the switching process of capacitors is not properly controlled. Firstly, this article described the fundamental principle and switching conditions of Thyristor Switched Capacitor (TSC). Secondly, the selection of switching time was analyzed for Thyristor Switched Three-phase Capacitor (TSTC). Finally, the simulation for TSTC was carried out by using MATLAB to verify the feasibility of analysis.
Design of Obstacle Avoidance and Tracking Robot
Authors: Liu Hai Bo , Dong Yu Jie
Published: July 2013

Nowadays, there are still no better solutions to the problems of multi-sensor information fusion and multi-behavior conflicts on intelligent tracking robot, which can not correctly recognize complex obstacles like U shape, furthermore, intelligently select the best obstacle-avoidance path. This design takes AT89S52 as the MCU of the wheel robot. Infrared sensor and ultrasonic transducer are used to collect environmental information around. Priority resolving and fuzzy behavior fusion are integrated to process the multi-sensor information and control the running states of wheel robot. By using the designed method, the robot can properly handle the different behaviors and behavior conflicts in its tracking progress. Also, more accurate sign information can be identified, and more complex obstacles like U shape can be avoided quickly and accurately by following the best path. The application result on the wheel robot verifies the efficiency of proposed method.
Analysis and Design of Open Remote Monitor and Control System
Authors: Chen Xiang , Pi Hui Huang , Zhou Lin Lin
Published: July 2013

Introduced a Web-based real-time network monitoring and control system design methods, the 3-D VR was applied in a remote monitor system based on browser/server structure, and a VRML and Java based 3-D remote monitor system was realized. Meanwhile, give possible solutions of the real-time data transmission and the stability of the system.
Numerical Control System Based on Permanent Magnet Linear Synchronous Motor
Authors: Ran Xue Nong
Published: July 2013

Linear servo system is an important part of numerical control machine tool, and its performance and quality will directly decide and affect the rapidity, stability and accuracy of numerical control device. The servo system made up of linear motor can realize zero transmission between motor and worktable with various advantages as fast response, high efficiency and position tracking precision. In this paper, the permanent magnet linear synchronous motor is used as actuator, and according to the idea of space vector decoupling control, the linear servo control structure is established based on position proportion adjustment and speed IP adjustment. On such backgrounds, the paper studies the iterative learning control method so as to realize the perfect position tracking ability and robust performance of the system.
Chinese Library Classification: TG659
Collection and Application of the Discontinuous Energy
Authors: Yue Xian Long
Published: July 2013

The article takes a gate as an example for studying the collecting,switching and using of the discontinuous mechanical energy created by opening and closing a gate .Firstly, we can generate power by mechanical energy created during the process of pulling and pushing a gate through devices which can collect mechanical energy and transform power. Then we'll store the power in the nickel-metal hydride batteries after rectifying and boosting for supporting power for counting device.This device can generate power for counting devices by mechanical energy which is seemingly useless in our normal life. It can save energyconsumption but cater to the idea of energy conservation and emission reduction.
Fusion of Panchromatic and Multispectral Images Based on the Second Generation Bandelet
Authors: Zhu Wei Dong , Shen Wei , Tu Xin Ru
Published: July 2013

In order to gain a new image with high spatial resolution and abundant spectrum by fusing panchromatic and multispectral images, a novel fusion algorithm based on the generation Bandelet is presented, and the fusion rule of Bandelet coefficients reposes on maximum absolute value of frequence. Fusion experiments based on new method, IHS and wavelet transform are carried out with panchromatic and multispectral images of Landsat-7. The experimental results show that fused image of new method is more excellent. Image edges are more distinct, and prove that Bandelet transform has the character of tracking image edges adaptively.
Intelligent Industrial Park Based on Internet of Things
Authors: Guo Xiang Fu , Wang Zhong Qiang , Zhao Lian Zhu
Published: July 2013

The construction of intelligent industrial park is an important part of intelligent power grid construction, and also a specific part in the national "Twelfth Five-year Plan". The development of the Internet of things is complementary to the construction of intelligent power grid, and also the key technology in the construction of intelligent park. With the development of software and hardware, the Internet of things will be more widely used in the construction of intelligent park.
Efficient Rescue and Position Scheme Based on CC2431
Authors: Huang Ya Lei
Published: July 2013

Analysis of the current fire fighting and rescue combat communications, through the support of the the ZIGBEE positioning technology, to solve the positioning of the combatant command of fire fighting and rescue scene, a state of war, as well as communications and command platform, to achieve a scientific and effective arrangements for police to protect the officers and men of life security, improve the efficiency of fire fighting and rescue.
Electromagnetic Induction Heating Application in Mining Safety Detection
Authors: Zhang Guang , Yue Xiao Guang , Yang Juan , Chen Jing Xi , Zhao Zi Qiang , Xie Xiao Lan
Published: July 2013

From the status and history the of electromagnetic induction heating, the concept of electromagnetic induction heating, formulas and principles are briefly analyzed. There are some overviews of some examples: the furnace based on electromagnetic induction heating; the plastic processing based on electromagnetic induction heating; the temperature control system based on electromagnetic induction heating. Through these examples, the basic situation of domestic electromagnetic induction heating is summarized. Mining engineering safety detection plays a very important role in mining engineering. A mining safety detection model is designed by using electromagnetic induction heating principle for monitoring the load and the air temperature data. This detection reference model can be used for many areas for mining safety.
Research on Welding Gig Design
Authors: Shi Feng Rong
Published: July 2013

In view of body welding jig design characteristics and regularity of body welding jig, expounds the knowledge representation and acquisition, to summarize in detail based on the type of fixture scheme, construction of a stepped plan for intelligent CAD knowledge base.
Process Conditions Governing Mechanical Expression of Shea Butter from Crushed Shea Kernel under Uni-Axial Compression
Authors: Olaniyan A.M. , Oje K.
Published: July 2013

Mechanical expression of shea butter from shea kernel (Vitelaria paradoxa) was studied using a 43factorial experiment under a Randomized Complete Block Design. The mechanical expression rig comprised an instrumented pistoncylinder assembly in conjunction with a Universal Testing Machine (UTM). Shea butter was mechanically expressed through the perforated base of the press cage cylinder when crushed shea kernel was subjected to uniaxial compressive loading by the UTM. The process conditions were heating temperatures of 50, 70, 90 and 110 °C; applied pressures of 1.5, 2.9, 5.8 and 8.8 MPa and loading speeds of 2.50, 5.00, 7.50 and 10.00 mm min-1. Heating of the crushed shea kernel samples prior to shea butter extraction was achieved by a temperaturecontrolled band heater enfolding the press cage cylinder. Results showed that a maximum oil yield of 35.10 %, a maximum oil recovery efficiency of 58.50 % and a minimum process loss of 2.83 % were obtained at a heating temperature of about 70 °C, an applied pressure of about 8.8 MPa and a loading speed of about 2.50 mm min-1.
Microwave Synthesis of SnO2/Fe2O3 Nanocomposites for Lithium-Ion Batteries
Authors: Yoshinaga Masashi , Kijima Norihito , Ishizaki Haruo , Akimoto Junji
Published: July 2013

SnO2/Fe2O3nanocomposites were successfully synthesized by microwave heating. SEM-EDX and XRD analyses and Raman spectroscopy revealed that nanosized SnO2was deposited on rod-shaped α-Fe2O3crystals. The SnO2/Fe2O3nanocomposites worked as a rechargeable electrode material. The initial insertion capacity of the SnO2/Fe2O3nanocomposites achieved 1522 mAh/g that is larger than the theoretical capacity, and the rechargeable capacity at 10 cycles was 862 mAh/g. The initial charge-discharge reaction of the SnO2/Fe2O3nanocomposites was caused by the redox reactions of SnO2and Fe2O3and alloying-dealloying reaction of Sn with Li.
Synthesis and Electrochemical Properties of Porous Titania Fabricated from Nanosheets
Authors: Sakao Mitsumasa , Kijima Norihito , Yoshinaga Masashi , Akimoto Junji , Okutani Takeshi
Published: July 2013

A porous titania was synthesized by spray-drying of titania nanosheets exfoliated by (C4H9)4NOH. Nitrogen adsorption-desorption isotherms showed that the porous titania has a mesoporous structure composed of slit-shaped pores. The porous titania acted as a rechargeable active material in a liquid organic electrolyte lithium cell. An initial lithium insertion capacity was about 150 mAh/g (cut-off voltage of 1.0 V), which approximately correspond to the composition of Li0.45TiO2.
Polarization Mechanism of Fine-Grained BaTiO3 Ceramics at High Temperature Region
Authors: Yamazaki Takahiro , Hoshina Takuya , Takeda Hiroaki , Tsurumi Takaaki
Published: July 2013

Pure Barium titanate (BaTiO3) ceramics with grain sizes of 0.6, 1.5, and 18 μm on average were prepared by using a two-step sintering method. The wideband dielectric spectra in the range from kHz to THz were measured at 25 and 150 °C to understand the polarization mechanism of fine-grained BaTiO3ceramics. It was revealed that the dipole and ionic polarizations decreased with decreasing grain size at 25 and 150 °C when the grain size was smaller than 1 μm. These mechanisms were interpreted as a grain boundary effect.
Structure and Electrochemical Properties of O3-Type Layered LixMn0.5Ni0.25Ti0.25O2 Prepared by Ion-Exchange
Authors: Ishida Naoya , Hayakawa Hiroshi , Akimoto Junji , Shibuya Hideka , Imaizumi Junichi
Published: July 2013

Li0.55Na0.03Mn0.5Ni0.25Ti0.25O2was prepared via Na/Li ion exchange from Na0.7Mn0.5Ni0.25Ti0.25O2as a starting compound. Li0.55Na0.03Mn0.5Ni0.25Ti0.25O2is a layered rocksalt-type oxide with the O3 structure. The electrochemical lithium insertion/extraction properties of O3-Li0.55Na0.03Mn0.5Ni0.25Ti0.25O2exhibits a reversible capacity of approximately 190 mAh g-1in the voltage range between 2.0 and 4.8 V. The voltage profile consists of two plateaus around 4.0 and 3.0 V. The layered structure remains unchanged and does not transform to the spinel structure during cycling.
Effects of Annealing Process on the Structure of Mn-Doped BiFeO3 Thin Films
Authors: Mizugai Motomi , Kiguchi Takanori , Usami Noritaka , Shinozaki Kazuo , Konno Toyohiko. J.
Published: July 2013

The effects of processing conditions on the morphologies of Mn-doped BiFeO3thin films have been investigated. BiFeO3thin films were prepared on a SrTiO3(001) substrate by CSD method. BiFeO3grew epitaxially on SrTiO3and Bi2Fe4O9has also orientation relationships with BiFeO3. It was found that the formation of Bi2Fe4O9was promoted in an O2atmosphere. Island morphologies were observed in the BiFeO3thin films after post-annealing at 1023K both in N2and O2atmospheres. The formation of the islands is promoted in an O2atmosphere.
Fabrication and Electrical Evaluation of MoSi2-Si Composite Thin Films
Authors: Hikita Shinya , Hayashi Teppei , Sato Yuuki , Yoshikado Shinzo
Published: July 2013

Thin films of a composite of molybdenum disilicide (MoSi2) and silicon (Si) were fabricated by radio frequency magnetron sputtering using a target made of a powder mixture of MoSi2 and Si with a Si-to-Mo molar ratio of 1:X (2.0 X 2.5). The Hall coefficients were measured to identify the conduction mechanisms in the thin films. The sign and magnitude of the Hall coefficients revealed that thin films with X = 2.02.2 having a hexagonal crystal structure showed p-type conduction, while the mechanism for the n-type film with X = 2.33 was unknown and that for a composite of hexagonal and an unknown structure with X = 2.3, 2.4 and 2.5 showed mixed conduction.
Effects of Particle Size on Properties of TiO2 Nanoparticle Thin Films Deposited by Electrophoresis
Authors: Kawakami Ryo , Yuasa Takuya , Sato Yuuki , Mori Yasushige , Adachi Motonari , Yoshikado Shinzo
Published: July 2013

The absence of cracks and a high optical transparency are critical factors for obtaining high performance when TiO2 thin films are used as cathodes in dye-sensitized solar cells (DSSCs). Synthesized and classified TiO2 nanoparticles were deposited by constant-current electrophoresis in ethanol. The optical transparency of thin films and the DSSC efficiency increased rapidly with decreasing particle size and increasing film homogeneity. This increase in the DSSC efficiency suggests that the electron conduction path in a thin film consists of connections in the crystal lattice formed between TiO2 nanoparticles. This formation of connections increases the electron diffusion length.
Electrical Properties of Grain Oriented Bi4Ti3O12-Based Ceramics for High Temperature Sensors
Authors: Shiga Koji , Yasuda Syogo , Hiruma Yuji , Nagata Hajime , Takenaka Tadashi
Published: July 2013

Grain-oriented Bi4Ti2.92Nb0.08O12(BITN) ceramics were prepared by hot-forging (HF) method. The grain orientation factor,F, of BITN ceramic determined by the Lotgering method were approximately 0.96. The resistivity,ρ, along thec-axis of HF-BITN ceramic is higher than that of thea,b-axis of HF-BITN and OF-BITN ceramics for the temperature range from 100 to 400°C. Theρalong the direction parallel to thec-axis is found to be about 109Ω·cm at 400°C, which is about ten times larger than that of OF-BITN ceramics. From resonance and anti-resonance characteristics, electromechanical coupling factor,k24, was 0.026 at room temperature.
Effects of Electrostatic Discharge on the Stability of Pryoelectric-Induced X-Ray Emission in LaTiO3 Crystals
Authors: Honda Hiroyuki , Nakanishi Yoshikazu , Fukao Shinji , Sato Yuuki , Ito Yoshiaki , Yoshikado Shinzo
Published: July 2013

The mechanism of pryoelectric-induced X-ray emission in LaTiO3 crystals is discussed. It is suggested that electrons which contribute to the X-ray emission were generated around and close to the crystal and were emitted from the z surface. The poor reproducibility was found to be due to a creeping electrostatic discharge. It is speculated that one of the factors of the discharge is the accumulation of positive charges on the z surface.
Low-Temperature Processing and Optical Hydrogen Gas Sensing Property of Pd-Loaded Titania Coating onto Flexible Plastic Substrate
Authors: Hamagami Junichi , Onimaru Shohei , Araki Ryo , Kawamura G. , Matsuda Atsunori
Published: July 2013

Transparent titania coating was formed onto a flexible polycarbonate plastic substrate by low-temperature fabrication process below 100 °C consisting of a sol-gel technique and a hot water treatment method. The titania coating with high transparency showed a good photocatalytic activity under ultraviolet (UV) light irradiation. Palladium metal acts as a catalyst for dissociative adsorption of hydrogen gas at room temperature under an atmospheric pressure. The palladium catalyst was deposited on the photocatalytic titania coating by a photodeposition process at room temperature under UV-light irradiation. The flexible polycarbonate plastic sheet with semitransparent palladium-deposited titania coating works as an optically readable hydrogen gas sensor which can operate at room temperature.
Crystallization of Tungstenbronze Phase and its Inelastic Light Scattering in Niobiophosphate-System Glass
Authors: Takahashi Yoshihiro , Fujie Nobuhiro , Osada Minoru , Ihara Rie , Fujiwara Takumi
Published: July 2013

We prepared a niobiophosphate-glass-crystallizing tungstenbronze-type Ba2NaNb5O15and measured elastic light scattering spectrain situin the glass-ceramics fabrication regime. We found that the studied glass possesses a strong tendency for phase separation into Al2O3P2O5and Nb-rich regions prior to crystallization. It is suggested that the tungstenbronze phase crystallizes in the Nb-rich region separated from the supercooled liquid phase. This study demonstrated thatin situRaman spectroscopy is also useful for observing the phase separation dynamics in glass.
Synthesis of Carbon-Added LiFePO4 Powders and Measurement of Charge-Discharge Properties
Authors: Nakamura Takahiro , Yamada Motofumi , Kodera Takayuki , Ogihara Takashi
Published: July 2013

LiFePO4/C powders were synthesized by ultrasonic spray pyrolysis using carbon powder instead of organic substances as the carbon source. LiFePO4 (LFP) powders containing different types of carbon powders were prepared and used as cathode active materials in lithium ion batteries. The charge-discharge properties of lithium ion batteries with LFP, LFP/AB, and LFP/CNT powders as the cathode material were worse than those of the battery with LFP/sucrose powder as the cathode active material.
Preparation and Electrochemical Properties of LiMnPO4 Nanoparticles by Polyol Method
Authors: Kodera Takayuki , Isobe Fuminari , Ogihara Takashi
Published: July 2013

Plate-like LiMnPO4particles were prepared by polyol method. The chemical and physical properties of plate-like LiMnPO4particles were characterized by XRD and SEM. The thickness of plate-like LiMnPO4particles was approximately 35 nm. XRD pattern of plate-like LiMnPO4was good agreement with orthorhombic olivine structure. The first discharge capacity of C/LiMnPO4cathode was approximately 95 mAh/g. 99.9 % of initial discharge capacity was maintained after 100 cycles.
The Electro-Hydraulic Control Directional Valve Based on Magneto-Rheological Fluid
Authors: Liu D.D. , Tang C.R. , Zhao C.
Published: July 2013

The electro-hydraulic control directional valve based on magneto-rheological fluid using in hydraulic support is proposed. The magneto-rheological fluid represents favorable flow liquid state without external magnetic field, but it can represent mechanics quality of similarity solid in strong magnetic field. The magneto-rheological fluid may become solid within milliseconds under the action of an external magnetic field, which can realize intelligent control of hydraulic system and overcome shortcoming of traditional hydraulic valve. The electro-hydraulic control directional valve uses magneto-rheological fluid as controlling fluid, and adjusts pressure difference of action main control valve between left end and right end though changing excitation coil current of magneto-rheological valve. The electro-hydraulic control directional valve based on magneto-rheological fluid can satisfy the self-feeding hydraulic support using requirements and has low manufacturing cost. The installation and using of the electro-hydraulic control valve is more convenient and fast. It reduces the point of failure of the hydraulic supports piping system and makes hydraulic support more secure and reliable.
On-Line Fault Diagnosis of Main Reducer Based on the Noise Characteristic Parameters
Authors: Xie Feng , Lei Xiao Bao , Yan Jun Fu
Published: July 2013

The noise of main reducer is the radiant energy of its structure vibration in the air. There are abundant running messages in its noise and this can be used as an important index to evaluate its assembly quality. The noise of main reducer is detected on-line and the gained noise signal is dealt with and analyzed. Dimensionless parameters in time/frequency domain and wave packet frequency band energy are extracted from vibration signals as the evaluation indexes of the fault diagnosis to the implementing of on-line diagnosis based on the pattern recognition. The availability of this method is demonstrated by the experiments.
Optimization of Contour Path in Pattenless Casting Manufacturing Technique
Authors: Yang Wei Dong
Published: July 2013

The method of contour path planning in Pattenless casting manufacturing (PCM) technique not only determines whether the modeling process can be normal and smooth, but also have a great impact on the forming accuracy and efficiency. The requirements of the different planning algorithm is reasonable and perfect.The algorithm directly impact on the efficiency of data processing, and the generating results also directly determines the forming efficiency and forming quality. In the paper, the suitable process planning for PCM technique is realized.
Study in Virtual Assembly of Hull Block on DELMIA
Authors: Li Bin Cheng , Liu Ying
Published: July 2013

The assembly process planning of hull block is an important point in the study of manufacturing automation and computer integrated manufacturing system (CIMS), which will influence the construction period and quality in shipbuilding negatively. Based on the assembly level model, this paper presents a new design of assembly process planning for hull block. With the improved disassembly method, we can get the reasonable planning of assembly sequence. At last, the whole assembly process was simulated based on DELMIA software. The results show that the study will be instructive and meaningful to the assembly of hull block.
Finite Element Analysis of Contact Stress in the Meshing Process for Internal Gear Pairs with Few Teeth Difference
Authors: Wei Yan Gang , Dai Shi Dong , Zhang Xiu Juan
Published: July 2013

The models of finite element analysis are established reasonably after combining the principle of gear engagement, contact mechanics, and finite element concept and method. Simulations are made for the meshing process of the internal gear pairs with few teeth difference using finite element method. Tooth contact area, contact position, and the distribution principles of contact stress along the direction of tooth depth are studied. The main effect factors on the maximum contact stress are analyzed. It is found out that the effect of cusp contact along the tooth profiles may be generated in the meshing process of the internal gear pairs with few teeth difference. The complexity of multi-pair teeth meshing effect during the meshing process is pointed out.
Operational Deflection Shape for Crack Detection in Structures
Authors: Asnaashari Erfan , Sinha Jyoti K.
Published: July 2013

Crack detection in structures has been one of the active research areas for decades. Several crack detection methods have been suggested in the literature with their own advantages and limitations. In this paper, a very simplified method has been presented which assumes the vibration of entire structure can be scanned through a laser vibrometer. Therefore, measurement at a large number of locations in any structure is possible. Excitation of the cracked structure at a frequency always generates higher harmonic components of the exciting frequency due to the breathing of the crack. The deflection of the structure at higher harmonics of the exciting frequency is mapped by (a) amplitude of deflection (AOD) at higher harmonics as suggested in the literature, and (b) a new method based on the operational deflection shape (ODS) (both amplitude and phase) at higher harmonics for the crack detection. This paper presents the proposed method and the results through numerical examples.
Energy Correlated Damage Indices in Fatigue Crack Extent Quantification
Authors: Dragan Krzysztof , Dziendzikowski Michal , Klimaszewski Slawomir , Klysz Sylwester , Kurnyta Artur
Published: July 2013

Signals received by piezoelectric transducers (PZT) network can be influenced by many factors. Apart from environmental conditions, whose variability should be compensated, significant difference in a signal can be also caused by relative geometry changes of a designed sensors node, e.g. the damage localization and its orientation with respect to sensors location in the node. In the adopted approach a set of damage indices (DIs), carrying marginal signal information content and correlated with the total energy received by a given sensor are proposed. These are sensitive to the two main modes of guided wave interaction with a fatigue crack, i.e. its transmission and reflection from a damage. Detailed description of DIs detection capabilities are delivered in the paper. Two dimensional reduction techniques: Principal Component Analysis and Fishers Linear Discriminant are compared. The results of the data collected from specimen fatigue test are used to compare several classification models based on the emerged effective damage indices.
Symptom-Based Reliability Analysis and Remaining Service Life Prediction of Deteriorating RC Structures
Authors: Huang Tian Li , Chen Hua Peng
Published: July 2013

This paper proposes a symptom-based reliability analysis method for deteriorating reinforced concrete (RC) structures on the basis of monitored data. The structural flexural resistance due to reinforcement corrosion is selected as a symptom which reflects the deteriorating structural performance. The symptom reliability and remaining service life are then estimated from the Weibull model for the structural flexural resistance development. The results for the numerical study example show the proposed approach is capable of prediction the remaining service life for the deteriorating RC structures subjected to the reinforcement corrosion.
Innovative Strategy to Reduce the Seismic Vulnerability of a RC Existing Building: Assessment and Retrofitting
Authors: Cancellara Donato , de Angelis Fabio , Modano Mariano , Pasquino Vittorio
Published: July 2013

In the present paper we have evaluated the seismic response of a Reinforced Concrete (RC) existing building located in an area classified as high seismicity zone and designed, in the past, only for gravitational loads. We have compared traditional and innovative steel braces for the seismic retrofitting by using a Displacement Based Approach. The innovative steel braces allow a significant improvement of the seismic behavior of the building by providing a better dissipation of the seismic input energy in the structure and thus ensuring a better performance of the RC structure in the elastoplastic range. Unlike the traditional retrofitting, the innovative strategy allows to significantly reduce the plasticization of the structural frame at the ultimate limit state, in order to minimize the post-seismic actions on the structure.