bluuebunny/crossref_metadata_2025 huggingface dataset:
Relationship between Life, Load and Rotation Speed of UHMWPE Bearing under Dry Rolling Contact Fatigue
Authors: Hazeyama Shintaro , Oyama Shunsuke , Kida Katsuyuki , Honda Takashi , Mizobe Koshiro , Koike Hitonobu , Itakura Kiyoto , Kashima Yuji , Kanemasu Kenji
Published: April 2013

The polymer bearings have been widely used in recent years. In this study, ultra-high-molecular-weight-polyethylene (UHMWPE) is investigated. In order to investigate the relation between the lives, loads and rotation speeds, rolling contact fatigue tests were conducted. It was found that rotation speed related to the bearing life and wear loss.
Bio Inspired Algorithms for Injection Moulding Optimization
Authors: Carreira Pedro , Alves Nuno , Ramos Carina , Bártolo Paulo J.
Published: April 2013

Social behaviors of living organisms found in nature, like food searching, environment fitness and survival are inspiration for meta-heuristic mathematical models. Replicating these natural organism behaviors, several optimization algorithms have been developed and applied to technological processes. In this work, some nature inspired algorithms are applied to the injection problem in order to optimize the injection runners’ geometry, so that the overall cycle time is minimized. A key issue is the injection moulding process, as it strongly determines the cost per part. A global optimization strategy was implemented for the injection moulding cycle time, covering the main steps of process, filling time, cooling time, packing time and opening time. To achieve the optimum solution for each design variable and obtain the best time solution overall, it will enable to evaluate optimality, robustness, convergence, and variables dispersion for each used algorithm.
Nonlinear Natural Frequencies of Rotating Composite Thin-Walled Beam with Geometrical Nonlinear
Authors: Ren Yong Sheng , Sun Shuang Shuang , Zhang Chun Jin
Published: April 2013

The nonlinear governing equations of motion for the rotating composite thin-walled beam are derived using Hamilton’s energy principle and variational-asymptotical method (VAM) on the basis of von Karman’s assumption. The nonlinear vibration of the beam is studied using Galerkin method and harmonic balance method. The large amplitude free vibration of the beam can be expressed as a nonlinear eigenvalue problem and solved using an iterative solution procedure. Numerical results are obtained for Circumferentially Uniform Stiffness (CUS )laminated composite configuration thin-walled beam. The study exhibit the effect of the fiber orientation and rotating speed on nonlinear natural frequency vs. amplitude curves. The developed model can be capable of describing nonlinear free vibration behaviors of rotating composite thin-walled beam with large deformations.
Estimation and Analysis for the Fatigue Life of Rail Joint Bolt
Authors: Li Xiao Peng , Ju Xing , Zhao Guang Hui , Liang Ya Min
Published: April 2013

One of the most important reasons for railway traffic accidents is the fatigue failure of the rail joint bolt. Therefore, the research on the fatigue properties of rail joint bolt has important practical significance. This paper analyzed the influence of different pre-tightening torque on the fatigue life of the rail joint bolt. Besides, the best pre-tightening torque of the bolt was acquired through theoretical calculations. Finally, the fatigue life of the rail joint bolt was predicted according to the relevant basic theory and methods of fatigue life analysis, which applied numerical simulation technology.
Design of Cylinder Positioning System Based on Proportional Valve
Authors: Shan Yun Xiao
Published: April 2013

Proportional valve-cylinder buffering positioning system was designed based on PID control method, which has simple structure, strong anti-pollution ability, convenient use and maintenance, and high precision. The system is endowed with high engineering value owing to its ability to achieve buffering positioning of cylinder in optional position of the whole cylinder stroke with positioning precision within ±0.2mm enough to meet the positioning requirement of manipulator.
Analysis and Judgment of the Local Loss Based on the Entropy Gradient
Authors: Wang Li Juan , Li Qiu Shi , Qian Yu Ping
Published: April 2013

Analysis of the flow loss is important in the turbomachinery, the current analysis methods based on the cumulative loss such as the total pressure loss coefficient and the adiabatic efficiency, and the local loss method reflect the loss, can’ t quickly reflect the physical principles that leads the loss and its’ development. To solve this problem, the paper based on the first and second laws of thermodynamics, a local losses model about the compressor internal flow was estimated using the entropy gradient, give a dimensionless loss function parameter I , and was verified in a three-dimensional numerical simulation about Rotor67. The numerical results show that: the model can quickly capture the magnitude and location of loss, it also can reflect the loss source, when the dimensionless parameter , the area is considered as an high loss area, the local loss is expressed as I. If the parameter near the wall for negative value indicates that reflux occurred.
Research on Mars Surface Image Visual Feature Extraction Algorithm
Authors: Hou Ying , Wang Gui Cai
Published: April 2013

Visual feature extraction was the basic of mars surface topography reconstruction. The deep research was done to extract mars surface image visual feature in the unstructured mars surface environment. On this basis, the paper gave the mars surface image visual feature extraction algorithm. The experimental results show that the algorithm has good adaptability to illumination change and rotation transformation of mars surface image. Meanwhile, the paper could extract the abundant visual features of mars surface image.
A Quantitative Analysis of Lake Tourism Resource Value Based on AHP-Fuzzy Comprehensive Evaluation Method
Authors: Zeng Yan , Bao Xiang Ping
Published: April 2013

Only the quantitative analysis and systematic evaluation of tourism resources, we can get comprehensive measurement of tourism resources value, thus making accurate target market actively seeking the sustainable and unique ways of development, authentically satisfy the requirements of the ecotourism development. According to this, this study integrated lake tourism resources characteristics, using three quantitative evaluation methods: Delphi method, analytic hierarchy process, and fuzzy comprehensive evaluation method, constructed the system and model of the lake tourism resources development engineering evaluation, and developed the theory of tourism resources value evaluation.
Reliability Enhancement Test of Detection and Control Unit
Authors: Su Quan , Hu Yi Yong , Yao Jun
Published: April 2013

According to the characteristics and working environment of the unit and based on the result of the fault tree analysis made on a detection and control unit, it easily to reach the prime failure mode of the unit. Failure mode of the main environmental factors of the detection and control unit were analyzed, then the main synthesis stress which may affect the unit were ensured, so that the unit’s potential weak link as the main concern of the RET can be identified. A testing plan of the unit based on the theory of RET was designed.
Mechanical Properties at High Temperatures and Microstructures of a Nickel Aluminum Bronze Alloy
Authors: Thossatheppitak Borpit , Suranuntchai Surasak , Uthaisangsuk Viton , Manonukul Anchalee , Mungsuntisuk Pinai
Published: April 2013

Nickel Aluminum Bronze (NAB) alloys have been widely used in different kinds of machine parts where the superior resistance to corrosion and erosion in saltwater is needed. In this work, mechanical properties at high temperatures and microstructures of a NAB alloy were investigated. First, NAB specimens were prepared as an as-cast ingot and were subsequently heat-treated at 675°C for 6 hours in order to improve microstructure and mechanical properties. The mechanical properties at high temperatures in form of the plastic flow curves of the NAB alloy were characterized by a deformation dilatometer. The NAB samples were compressed at high temperature and rapidly cooled down to room temperature. The deformation temperatures of 825°C, 850°C and 900°C, a strain rate of 0.01 s-1, and a maximum compression strain of 0.4 were considered. The influences of the temperature on flow behavior of the NAB alloy were investigated. The plastic stress-strain curves at different temperatures were compared with regard to the rate of material strain hardening and softening. It was found that the compression stresses decreased with increasing temperatures. Additionally, the resulted hardness and microstructures of the alloy after forming at high temperatures were analyzed.
Numerical Study of Droplet Formation Time on Solid Surface
Authors: Dwiyantoro Bambang Arip
Published: April 2013

Microdroplets on solid surface are very common phenomenon in many engineering applications. The microdroplet formed from the fluid remaining on the column of micropillar after dewetting process. In this study, we generated microdroplet with various patterns and simulated the microfluidic dynamic processes based on a deforming body-fitted grid approach. The simulation results provide for explaining the effects of Capillary number and the liquid thickness on micropillar surface in the growing droplet diameter and microdroplet formation time.
Dynamic Target Tracking Based on Particle Filter in Actual Environment
Authors: Chen Tian Ding , Lu Chao , Hu Jian
Published: April 2013

With the development of science and technology, target tracking was applied to many aspects of people's life, such as missile navigation, tanks localization, the plot monitoring system, robot field operation. Particle filter method dealing with the nonlinear and non-Gaussian system was widely used due to the complexity of the actual environment. This paper uses the resampling technology to reduce the particle degradation appeared in our test. Meanwhile, it compared particle filter with Kalman filter to observe their accuracy .The experiment results show that particle filter is more suitable for complex scene, so particle filter is more practical and feasible on target tracking.
Sea Bottom EM Field of M2 Tidal to Probe Upper Mantle Conductivity
Authors: Xu Yan , Xu Jun , Zhang Wen Hu
Published: April 2013

Recent laboratory experiments demonstrate that electrical conductivity of upper mantle (UM) minerals is greatly increased by small amounts of water or by partial melt. Determination of deep conductivity using electromagnetic (EM) methods can thus provide constraints on the presence of volatiles and melting processes in UM. Probing conductivity at UM depths requires EM data with periods of a few to one cycle per day. This is a challenging period range for EM studies due to the spatially complex ionospheric source that dominates at these periods. The idea of exploiting tidal signals for EM studies of the Earth is not new, but so far it was used only for interpretation of inland and transoceanic electric field data due to M2. Emphasis in this work is made on a discussion of sea bottom magnetic field of the same origin.
Research on Accounts Receivable Financing Model Based on E-Commerce Platform
Authors: Cheng Guo Ping , Tu Jian Ping
Published: April 2013

With the rapid development of information technology, electronic information network system technology is growing rapidly. Accounts receivable financing model based on the E-commerce platform is gradually mature. Firstly, this paper discusses the mechanism of accounts receivable financing based on E-commerce platform. Secondly, it discusses each participating subjects. Finally, compared with traditional accounts receivable financing model, it makes a conclusion that carrying out accounts receivables financing based on the E-commerce platform can not only reduce the risk of the parties involved, as well as improve financing efficiency.
Research on Electronic Equipment Fault Diagnosis Expert System Based on Embedded Linux
Authors: Zhang Jian Hu , Lei Lei , Li Jia Feng , Cui Xin You , Wu Yong
Published: April 2013

This paper elaborate one circuit fault diagnosis method about electronic equipment circuit detection combined with expert system on ARM9 and embedded Linux platform and design CLIPS expert system using DSP combined with CPLD data acquisition, making full use of DSP high for-speed data processing capability and then passing the data to the Embedded Linux system operation. Expert system implemente a real-time fault diagnosis according to the the predefined fault diagnosis Knowledge. Compared with traditional testing equipment, the expert system has the advantage of knowledge updating conveniently, high fault diagnosis accuracy rate, etc.
Research on Dynamic Characteristics for Large Span Cable-Stayed Suspension Bridges with CFRP Cables
Authors: Liu Rong Gui , Feng Guo Ying , Chen Bei
Published: April 2013

Cable-stayed suspension bridge with Carbon Fibre Reinforced Plastics(CFRP) cables is a new type of bridge structure. To study the dynamic characteristics for this kind of bridges, and its differences from cable-stayed bridges of the same span level, finite element dynamic modle of a Cable-stayed suspension bridge with main span of 1488 meters is established and a series of calculations is done. The results show that, natural frequencies of cable-stayed suspension bridges with CFRP cables are relatively small, integral frequencies are stepped and discontinuous; Its modes are centralized and the natural vibration modes show a lot of coupling; The natural frequencies of this kind of bridges are smaller than cable-stayed bridges of the same span level, the entire stiffness decreased.
Research on the Parametric Design System for the Excavator Working Device
Authors: Ding Yue , Yuan Ming Hai , Dai Zhi Yong
Published: April 2013

As the important technology of CAD design, parametric design technology is one of the most important research content in computer aided design field. To realize rapid design the excavator working device, this paper puts forward an idea that combine the CBR (Case-Based Reasoning) technology with parametric technology in the process of modeling excavator working equipment. In the process of parameterization, it adopts four key technologies (Modularization Technology, Standardization Technology, Knowledge Reasoning Technology and Database Technology) to divide the module and analysis the dimensions of the excavator working equipment, and then establish the database. Finally the overall implementation process scheme of the excavator working device is given out.
Design and Analysis of a Novel Wavelength-Selelctive Waveguide Photodetector
Authors: Liu Fei , Huang Yong Qing , Hu Fu Quan
Published: April 2013

A novel wavelength-selective waveguide photodetector is designed in this paper , which consists of a waveguide photodetector (WGPD) and a Fabry-Pérot (F-P) cavity filter . The peak wavelength of the integrated device is at 1538nm . The 3-dB line-width of 0.3nm , quantum efficiency of 25% and responsivity of 0.2A/W are theoretically obtained . The analysis method can be applied to other integrated devices that have more components . The epitaxial growth and fabrication of the photodetector is discussed, exhibiting the experimental character .
An Ultrasonic Motor Precision Adjustable Speed Scheme Study and Analysis
Authors: Chen Ming Fang , Zou Ping , Han Gang , Hou Bai Min
Published: April 2013

In this paper, the traveling wave ultrasonic motor speed regulation method, such as voltage regulators, and phase modulation characteristics，are detailed studied. Comparing the advantages and disadvantages of each, the paper put forward the reversing pulse width adjustment scheme. Experiments show that the reversing pulse width adjustment method is a good speed regulation method, the dynamic, wide speed range and good linearity governor.
Simulation of Airflow Motion in Jet Nozzle with Different Geometric Parameters
Authors: Zhu Guo Cheng , Ibrahim Sayed , Militky Jiri , Wang Yan , Kremenakova Dana
Published: April 2013

Jet nozzle with tangentially injected airflow has been applying into spinning technology due to the tangential force produced by swirling airflow. In order to understand the airflow motion trajectory in jet nozzle, modify the nozzle structure and dimension, FLUENT software program is used. Some parameters which are closely related the airflow motion profiles are studied, such as the diameter of nozzle chamber, the diameter and angle of the orifice. The results showed that the intensity of air swirling is more strong in a smaller nozzle chamber; a larger orifice diameter is helpful for producing strong yarn and improving production efficiency, but it requires a larger nozzle chamber, therefore, a reasonable rate of orifice and nozzle chamber diameter is important; as the orifice angle increases, the tangential velocity decreases, which decreases the intensity of airflow swirling, and a small orifice angle will cause a larger reverse jet, which is bad to draw the fibers into the nozzle.
Study on MR Imaging of Endothelial Progenitor Cells Labeled with the Complex of Super Paramagnetic Iron Oxide and Transfection
Authors: Chang Na , Zhang Jun , Zhang Jun Shi
Published: April 2013

To explore the characteristics of magnetic resonance（MR）imaging of the rat endothelial progenitor cells（EPCs）labeled with superparamagnetic iron oxide（SPIO）. Total mononuclear cells (MNCs) were isolated from SD rat peripheral blood by ficoll density gradient centrifugation, and then the cells were plated on fibronectin-coated culture dishes. Attached cells were collected after 7 days cultured. EPCs were indentified by the laser confocal microscope and were counted in the inverted fluorescence microscope. EPCs were incubated with Fe2O3-arginine for 24 h, and the cells underwent MR imaging with three sequences (T1 WI, T2 WI, T2*WI). The results showed that the effective rate of labeled EPCs was 96%, and the survival rate of cells was 95%. The signal intensity on MRI was significantly decreased in labeled EPCs compared with unlabeled cells. EPCs labeled with SPIO can be sensitively displayed by the MR imaging.
Design for Laser Beam Cutting Machine Tools Integrated NC System
Authors: Lu Rong Jian , Xu Zhao Jun , Liu Ying , Shen Jing Lei , Li Pin
Published: April 2013

The laser beam cutting machine integrated NC system is designed by using multiple controllers. The data communication between NC and laser generator is realized by RS485 bus. PIC bus is connected to DSPIC controller, which drives AC servo motor to run. Meanwhile, the design of system hardware circuit is introduced and parts of the circuit diagrams are shown. Design description of the system software is also given, which is to achieve the integrated control of laser and machine.
A Study on Fault Diagnosis of Gears Based on Local Mean Decomposition Method
Authors: Pan Qiang , Xiao Deng Hong , He Tian
Published: April 2013

In present paper, the effectiveness of local mean decomposition (LMD) method to signals of fault gears, which are multi-component amplitude modulated and frequency modulated, is demonstrated. A series of tests on wearing and broken tooth of gears are conducted. And the fault characteristics extracted by Fourier transform, Hilbert transform and LMD are compared. The results validate that LMD method is an effective way to extract the characteristics of fault gears and improve the accuracy of fault diagnosis of gears since it is able to reduce effect of false components.
Soil-High-Rise Building Group Dynamic Interaction Considering Site Effect
Authors: Ge Qi , Xiong Feng , Huang Qun Yi
Published: April 2013

This article reports a sub-domain method to analyze the dynamic interaction of soil-high-rise building group considering sit effect, which is the extension of the domain reduction method proposed by Bielak and his coworkers in the framework of the finite-element method, originally for building–soil–foundation interaction problems. The whole domain with high-rise building group is divided into two interrelated sub-domains, the external domain and the internal one. And the method contains two steps. In addition, the effect of the external domain to the internal domain is expressed by the equivalent forces which are put on the nodes of the interface between the two sub-domains in the second step. The formation of the equivalent force is attained according to the equation of motion. In the first step the free-field ground motion is calculated under the bedrock wave excitation, and all the nodal displacements are stored. Then the equivalent forces are calculated according the data in the first step, using the formulation of the equivalent force. In the second step a finite element analysis model of the sub-domain containing the internal domain and the high-rise building group is established, and the equivalent forces are put on the nodes of the interface. Later the seismic response of soil-high-rise building group can be calculated.
Numerical Simulation for Effects of Running Surface Profile Structure in Piston Ring Group on Blow-By and LOC
Authors: Tang Dong , Lv Hui Min , Hu Min , Yao Shu De
Published: April 2013

The oil film distribution of piston ring lubrication is determined by the running surface profile of piston ring, which has significant effect on lube-oil- consumption (LOC) and blow-by of diesel engine. Based on the Excite Piston&Ring software in AVL Company, the effect of changing the running surface lines of piston ring group on LOC and blow-by of a automotive diesel engine has been analysed, which contributes to the design of piston rings. The results show that the performance of blow-by and LOC in scheme two is better than that in scheme one.
Electronic Equipment Fault Diagnosis Expert System Based on PDA/HPC
Authors: Lei Lei , Zhang Jian Hu , Peng Wei , Wu Yong , Li Lin Tao
Published: April 2013

In order to develope and research fault diagnosis platform of one electronic equipment, this paper mainly expound the equipment fault diagnosis system based on PDA/HPC structure and function as well as the development platform technology, introduce database management system structure and realization based on PDA/HPC. The successfully developed exepert system is of great significance to improve repair guarantee ability of the electronic equipment and its technical realization and application has model significance and reference value.
Study of Milling Thickness and Milling Force on Two Directions Ultrasonic Vibration Assisted Milling
Authors: Li Zhang Dong , Zhao Bo , Tong Jing Lin , Duan Peng
Published: April 2013

This paper Studied the milling thickness and milling force on two directions ultrasonic vibration assisted milling. X direction ultrasonic vibration assisted milling periodic can generate periodic separation between the tool tip and the workpiece during the cutting process, so the milling force can be reduced, and the effect of the pulse cutting can be produced. Y direction ultrasonic vibration assisted milling can reduce the average cutting force, and milling width can be increased in Y direction ultrasonic vibration assisted milling, so the surface quality can be improved.
Optimization of Electrode Structures of PZT Acoustic Energy Harvesters Fabricated on SOI Substrate
Authors: Tomii Kazuki , Tomioka Shungo , Iizumi Satoshi , Tsujimoto Kyohei , Uchida Yusuke , Matsuda Tomohiro , Hagiwara Saori , Miyake Shuntaro , Nishioka Yasushiro
Published: April 2013

This paper reports on the power generation performances of a PZT microelectromechanical system (MEMS) acoustic energy harvester having dual top electrodes to utilize the different polarizations of charges on the surface of a vibrating PZT diaphragm at first resonance. The PZT acoustic energy harvester was fabricated on a silicon-on-insulator (SOI) substrate, and had a diaphragm with a diameter of 2 mm consisting of Al (0.1 μm)/PZT (1 μm)/Pt (0.1 μm)/Ti (0.1 μm)/Si (1.0μm)/ (0.5 μm), and the diaphragm vibrations were excited by sound pressure. The top Al electrodes independently cover the peripheral surface and the central surface of the PZT diaphragm. The peripheral energy harvester generated a power of W, and the central energy harvester generated a power of W at an SPL of 100 dB at 9.95 kHz.
Sintering and Dielectric Properties of Sr-Rich Barium Strontium Titanate (BST) Ceramics Fabricated by a Mixed-Phase Method
Authors: Zhou Li Xin , Jin Deng Ren , Xie Chao Jun , Cheng Jin Rong
Published: April 2013

Ba 1-x SrxTiO3(x=0.6 to 0.9 interval of 0.1) ceramics were developed by a BT sol-assisted sintering technology with a mixed-phase sintering from the mixture of BT and ST powders synthetized by a solid-state reaction method. The sintering behavior and dielectric properties of the ceramics were investigated. Results show that the sintering activity of the ceramics becomes worse and worse when increased the strontium content, and the sintering condition have a remarkable effect on the density of the ceramics. Dense ceramics were obtained when sintered at 1280°C for 8h with a relatively density of above 94%. The composition had a strong effect on the dielectric properties, while the sintering schedule had a little influence on the dielectric temperature spectrum of the BST ceramics. The Ba 1-x SrxTiO3(x=0.9) ceramic with dielectric constant～335, loss tangent～0.000625 at 1.85 GHz and 20°C, and good temperature stability of dielectric constant above the room temperature is attained.
Application of Photocatalytic Concrete Paint and its Effect of Decomposing Vehicle Exhaust
Authors: Wang Xiao Lun , Liu Li Ping , Xu Hai Ming
Published: April 2013

With the widely research of Photocatalytic titanium dioxide, researchers have found another way of managing air quality. As an excellent photocatalyst material, nanometer titanium dioxide has begun to be used in road engineering in recent years. In this paper, at first, different content of titanium dioxide were dispersed evenly and separately in a kind of silane solvent to make the coating material with photocatalytic performance. The results show that nanometer titanium dioxide is able to decompose CO, HC, NO and CO2 after being dispersed in silane solvent. The results also show that a certain content oftitanium dioxide can be chosen after considering effect, workability and economic factors in practical application. Then the brushing method and the decomposition effect of the photocatalytic paint are discussed. The tests indicate that proper content of nanometer titanium dioxide with suitable brushing method can maximize catalytic efficiency. At last, in order to study the decomposition mechanism, using ion chromatography and chemical titration to analyze the decomposition products separately, the results prove that nanometer titanium dioxide can decompose NO, HC, CO and other harmful gases into nitrate and carbonate.
Experimental Study of Suffusion in Granular Soils
Authors: Nguyen Duc Manh , Plé Olivier , Monnet Jacques
Published: April 2013

Internal erosion is one of the main causes of instabilities within hydraulic earth structures. The occurrence of breach in new structures underlines the emergency to quantify phenomena induced. Over the years, several methods have been developed to characterize and model internal erosion. The intention of this paper is to present a new experimental device named Cross Erosion Test (CET) and devoted to the characterisation of internal erosion. This test consists of the injection, in a first drilling, of clear water and the recovery, in another drilling, of water charged with particles. With this technique, main processes occurred can be identified. Moreover, preliminary experimental results show the possibility to characterize suffusion into a specific soil.
Structural Performance of Disaster Relief Housing Units Subjected to Cyclic Loading
Authors: Ha Tae Hyu , Kim Dae Jin , Han Choong Hee
Published: April 2013

In this paper, a new disaster relief housing unit is proposed, and its structural performance under cyclic loading conditions is investigated. This housing unit is composed of a series of identical unit wall panels, which are made up of steel angle frames, steel rods for diagonal bracing and sheeting elements. The lateral load resisting capacity of only a single wall panel is examined by performing a test on three specimens. The theoretical lateral strength of the wall panel is estimated and compared with the test results. The contribution of sheeting elements, generally treated as nonstructural components, is considered, and the energy dissipation capacity of the proposed unit is also evaluated. The results of the test show that the addition of sheeting elements is helpful to enhance the peak lateral strength of the panel frame and the steel diagonal bracing is very effective in enhancing the peak strength of the unit wall panel at initial stages, but not the overall ductility of the structure.
Minimum Weight Design of Pre Engineered Steel Structures Using Built-up Sections and Cold Formed Sections
Authors: Saleem Muhammad Umair , Siddiqi Zahid Ahmad , Qureshi Hisham
Published: April 2013

In the past few decades most of the efforts were made to achieve minimum weight of the steel structures by satisfying all the design requirements imposed by various latest building codes and this idea lead towards the concept of pre-engineered steel buildings (PEB). In current research work, minimum weight buildings are targeted with simple fabrication process and easy erection to have maximum structural efficiency. Minimum weight of structure is proportional to the minimum cost and hence lowers seismic and gravitational forces. To achieve above mentioned objectives and to verify the suitability and applicability of concept of PEB, a sample steel industrial building is first analyzed and designed by using conventional steel hot rolled sections and then by using pre-engineered tapered and cold formed sections. Results of analysis were compared in terms of weight and response of structures which clearly indicated that PEB structures are of less weight and structurally more efficient than conventional steel structures.
Influence Law of Middle Tower on Mechanical Performance of Three-Tower Self-Anchored Suspension Bridge
Authors: Zhang Chao , Chen Yong Jian , Fang Zhen Zheng , Wu Sheng Ping
Published: April 2013

To multi-tower suspension bridge, reasonable design of middle tower is very important. In this paper, a three-tower self-anchored suspension bridge (TSSB) was taken as research background. The effect of middle tower stiffness and mass on static and dynamic performance of TSSB was discussed. Through dynamic characteristic analysis, we got the modes whose nature frequencies were affected obviously by middle tower stiffness. The seismic parameter analysis showed that rigid and light weight middle tower was benefit to seismic performance of TSSB. At last, this paper concludes that designer should consider static and dynamic performance of TSSB comprehensively in the design of middle tower.
Preparation of Coal Gangue Cement Mortar
Authors: Li Wen Xia , Wang Dong Li , Niu Ji Shou , Ma Xian Wei
Published: April 2013

Many researches on coal gangue are aimed at increasing its activity by many methods together such as thermal, mechanical and chemical. The methods are so complex that they are difficult to be adopted by some companies. In this paper, considering the low-strength requirement of cement mortar, the activity of coal gangue is more evidently shown by Ca(OH)2 activator. The 28-days strength of coal gangue cement mortar can reach 18MPa and the hydrated mortar shows and keeps an expansive behavior by adding methyl cellulose ether and CaSO4•2H2O at all the ages.
Evolution Model of Concrete Failure Surface under the Action of Load and Frezee-Thaw Cycles
Authors: Chen Si Jia , Song Xiao Bing , Liu Xi La , Zhang Jia Chao
Published: April 2013

Concrete failure surface is the most important tool to predict concrete strength under complicated load. Most concrete structures in cold regions are subjected to both external loads and freezing-thawing, while now most researchers focused on the freeze-thaw durability of concrete without external loads. To make up the deficiency, the degradation of compressive strength of concrete under the simultaneous action of external loads and freezing-thawing are experimentally investigated in this research. Finally, a concrete failure criterion is adopted to establish an applicable failure surface in principal stress space for concrete.
Retrofitting Bond of Damaged Concrete Surface in Harbour Structures
Authors: Ghaffari Alireza , Ghaffari Amirreza
Published: April 2013

An experimental research of the bonds amongst retrofitted materials on concrete structures under seashore climate has conducted. The strength of a bond between repair materials and concrete substratum has been assessed on the base of slant shear test experiment. In this research 52 samples has prepared and used for experiment .The fresh concrete with fine aggregate mix only (less than 9mm particle size without coarse aggregate) and 14% silica fume by weight of cement (normally 8 to 10% but 14% because of high amount of fine aggregate ) added to the mix which improve the properties of concrete such as bond strength as well as compressive strength and reduces permeability of sea water in corrosion or deterioration of steel bars by protecting reinforcing steel from erosion (pivotal aim of research) and even reduces abrasion resistance .Therefore silica fume was rolled an essential repairer materials on seashore structures. The retrofitted specimens were cured on water pool and kept on the seashore simulation climate upto required curing times . The strength of the improved samples has studied in three aspects as bond strength according surface roughness ,curing periods and concrete additives like silica fumes and fibres .
A Strategy of Sustainable Environment Management: The Case Study of Wutai Township in Taiwan
Authors: Taiban Sasala , Gau Hwa Sheng , Chung Chung Yi , Liao Shao Wei , Lai Wen Liang
Published: April 2013

After Typhoon Morakot in 2009, the Taiwanese government relocated three indigenous villages to the lowland, leading to changes in traditional lifestyles and customs. Using the Wutai community as a case study, this paper suggests a strategy for sustainable post-disaster indigenous development . The paper focuses on two issues, the traditional land use of Rukai people in Wutai Township and their methods used regarding village relocation, afforestation and mountain patrol after Typhoon Morakot. Our research found that about 73.0% of locals who agree with afforestation in Aboriginal territory, 54.3% would like to sign a contract with the government which lasts more than twenty years, and 84.5% wish to be included in mountain patrol. Therefore, we propose that a mountain patrol foundation be established, to be responsible for the recruitment of mountain patrol members, planning afforestation, and conservation. Moreover, through the foundation, a mountain academy might be established, which could handle dynamic activities and systematize disciplines so as to link traditional environmental knowledge and modern conservation skills. Also, the foundation could help the local communities to develop eco-tourism and other related industries to increase local incomes and conservation funds, as a step towards sustainable development.
Assessment of the Influence of Carbon Absorption Efficiency of Plants with High Concentration Sulfur Dioxide
Authors: Chung Chung Yi , Chung Pei Ling , Gau Hwa Sheng , Liao Shao Wei , Lai Wen Liang
Published: April 2013

The experiment tests carried out on the sulfur dioxide (SO2) will reduce the amount of carbon dioxide (CO2) into the plant body. When the plants absorb CO2, SO2 enters the stomata at the same time, and the photosynthesis rate will immediately fall. The carbon absorption potential showed decreased as SO2 concentration increasing. However, after 600 ppb SO2 gas fumigated for 48 hours, Hibiscus tiliaceus had the most carbon absorption potential reducing rate as 76% and the least influence by this concentration was Acacia confusa which reduced 2% carbon absorption potential. When the fumigation concentration rose to 1000 ppb, except the leaves of Camellia axillaries had all fallen, the Hibiscus tiliaceus also showed the most variance of carbon absorption potential as 81% reducing than before fumigation and the Hibiscus taiwanensis was the second with 65% reducing rate. As the fumigation concentration rose to 2000 ppb, the Camellia axillaries, Hibiscus taiwanensis, Viburnum odoratissimum and Hibiscus tiliaceus could not tolerate the high SO2 concentration environment and the leaves all fell away. The carbon absorption potential reduced more significant than two other fumigation concentration. The most variance was Palaquium formosanum which with 92% decrease. The Neolitsea parvigemma and Leea indica also had 85% and 84% reduce rate than before fumigation, respectively.
To Recognize Sources of Pollution in Dapeng Bay by Sediment Quality in Southern Taiwan
Authors: Lai Wen Liang , Gau Hwa Sheng , Chung Chung Yi , Chen Shih Chieh , Liao Shao Wei
Published: April 2013

Canonical discriminant analysis (CDA) was applied in order to distinguish the sediment-quality parameters from neighboring rivers, and to recognize similarities of sediment properties between lagoon and neighboring rivers. Two set of constructed discriminant functions showed a marked contribution to most of the discriminant variables. In sediment, the significantly parameters - porosity, Cd, Cr, Al, and Pb were combined as the heavy metal factor. The recognition capacities of the two discriminant functions were 82.6 and 17.4, respectively. The Dapeng Bay had no significant similarity with the three neighbouring rivers with the sediment properties.
A Software for Estimating Cosmic Radiation Exposure of Aircraft Crew
Authors: Li Qian , Zhang Shi Feng , Feng Ying Jin , Chen Wei Ru
Published: April 2013

To estimate Radiation doses received onboard aircraft to protect aircrew in accordance with the basic standard on ionization radiation protection and radiation source safety of China, we has developed a software called CARD used to calculate the effective radiation doses. A three dimension matrix is kernel part of the CARD, in the matrix preserves information about effective dose rates of cosmic radiation for retrieval is constructed. The data of matrix are based on results of simulation and measurements. The comparisons between the calculated effective dose using this tool and using CARI-6 respectively for various flights are carried out. The present analysis shows that for the cosmic radiation, this software is sufficient to ensure a precision on the dose estimate of flight.
Enhanced Photoluminescence of YInGe2O7:Eu3+,Li+ Phosphor Prepared Using the Solid-State Method
Authors: Chen Huang Yu , Yang Ru Yuan , Chang Shoou Jinn
Published: April 2013

A Eu3+ activated YInGe2O7phosphor was synthesized by solid-state reaction and lithium carbonate was added to change the morphology and photoluminescence properties. Scanning electron microscopy showed large particle size and necking shape were obtained as the concentrations of Li+ ions increase. In the PL studies, the excitation spectrum of YInGe2O7:Eu3+ phosphors exhibited a broad band in the UV region centered at about 272 nm attributed to charge transfer state (CTS) band, which has a little shift after Li+ ion was added. As the Li+ ion concentration increased, the photoluminescence intensity of the red emission at 620 nm of Eu3+ ions was enhanced, and the optimized concentration of of added Li+ ion is 0.05. The results showed that addition of Li+ ion allows YInGe2O7:Eu3+ phosphors emitting relatively pure red light.
Experiments with Phase-Delay and Time-Delay Methods for Slow Light in Photonic Crystal Waveguide
Authors: Lu Hui , Zhang Li Jun , Zheng Zhan Qi , Zhang Yi Heng , Leng Yong Qing
Published: April 2013

In this paper, we report the experimental measurements of the group index of a photonic crystal waveguide based on silicon-on-insulator slab. The time-delay of the pulse is also measured, and it is in good agreement with the theoretical result calculated according to the group index with the phase-delay method, which is about 4.7ps.
Rolling Process for the Continuous Forming of Curved Surface Parts Based on Bended Rolls
Authors: Cai Zhong Yi , Wang Mi , Li Ming Zhe
Published: April 2013

A new sheet metal forming process which can form three-dimensional surface rapidly, effectively and with lower-cost has been proposed. This paper mainly focuses on the fundamental aspects of the process. The principle of the rolling process based on bended rolls is introduced, and the methods to calculate the longitudinal bending deformation and to design the roll gap are presented. Experiments for typical surface parts are carried out. The forming results of convex surface and saddle shaped surface parts are measured and analyzed, the analyzed results demonstrated that the proposed process is a feasible and effective way of forming three-dimensional surface parts.
Effect of Molding Temperature Conditions upon Titanium Mesh MEA Performance for Direct Methanol Fuel Cell
Authors: Wang Xing Xing , Li Zhi Yang , Zhu Yu , Huang Ming Yu , Ni Hong Jun
Published: April 2013

. In order to obtain suitable titanium mesh MEA (membrane electrode assembly) for direct methanol fuel cell (DMFC) molding temperature conditions, titanium mesh was used as electrode substrate material, Nafion 117 membrane was used as proton exchange membrane, PtRu/XC-72R and Pt/XC-72R were used as anode catalyst and cathode catalyst respectively, anode and cathode of titanium mesh MEA were prepared by drop-coating method. When the MEAs were molded by hot-pressing under 5 MPa for 180 s with different temperatures of 115°C, 135°C and 155°C, respectively, the maximum power density of Ti mesh-based MEAs increases firstly, after the first peak, it gradually decreases along with the increase of molding pressure conditions, and the maximum power density appears at the molding temperature of 135°C, so conclude that molding temperature of 135°C is more appropriate for making the titanium mesh MEA.
An Improved DV-HOP Localization Algorithm Based on Simulation Curve Fitting
Authors: Chen Lin , Fang Zhi Yi , Lv Wei , Liu Zhuang
Published: April 2013

Localization technology is one of the key technologies in Wireless Sensor Network (WSN). The Centroid algorithm, DV-HOP algorithm, APIT algorithm and Amorphous are the classic algorithms which are based on Range-free localization algorithm. This paper is improved on the basis of the DV-HOP and Weighted DV-HOP node localization algorithm, proposed an improved DV-HOP and weighted DV-HOP of WSN localization algorithm based on Simulation Curve Fitting (SCF). The SCF algorithm makes the process more refined during selecting the beacon node and the selected beacon node can be closer to the accurate position.
Research on Motion Compensation for Airborne SAR Interferometry System
Authors: Gao Yang , Du Jin Song , Liu Yi Yang , Bi Xin
Published: April 2013

Deviation from definitive flight path of a plane fixed a synthetic aperture radar (SAR) leads to inaccurate and defocused radar images, which has serious effect on the SAR interferometry (InSAR) processing. Therefore, the precise motion compensation (MOCO) for the airborne SAR interferometric data is the key to obtain high quality digital elevation model (DEM).The position and orientation system (POS)-based residual motion error compensation method is designed. Considering the precision of POS, there will be residual motion error after the POS-based MOCO, which have serious effect on the interferometric phase, especially the residual baseline errors. To solve the above problem, this paper proposed an enhanced multi-squint processing based model to estimate the residual baseline errors. This method can decrease the influence of data decorrelation and baseline error varying with range, and dramatically improve the measuring accuracy of InSAR.
A Fabrication for Ameliorating Pyroelectric Harvesting Converters
Authors: Hsiao Chun Ching , Siao An Shen
Published: April 2013

A three-dimensional pattern is helpful to improve the temperature variation rates in pyroelectric elements, using lateral temperature gradients induced on the sidewalls of the responsive elements. Creating a complex pattern with a deep trench structure for fitting various discharges of waste heat was imperative, and hard to fabricate, using the traditional methods of dry/wet etching and a dicing saw. A novel method using sandblast etching was successful in fabricating the complex pattern of the vortex-like electrode for improving the electrical output and enhancing the efficiency of the PZT pyroelectric harvesting converters.
High-Q Silicon-on-Insulator Micro-Ring Resonator with Silica Covering
Authors: Liu Chao , Xue Chen Yang , Cui Dan Feng , Zang Jun Bin , Wang Yong Hua , Wang Jing Xue
Published: April 2013

We designed High-Q micro-ring resonators based on SOI material. A new method of using a top SiO2 layer to cover the waveguide is applied and the tested Q factor is as high as 1.0135×104. Micro-ring resonator has been fabricated using Electron-Beam Lithography and Inductive Coupled Plasma. OptiFDTD was used to simulate the micro-ring resonator and we compared the transmission spectrum of this resonator with the resonator without SiO2 covering.
Single Camera Stereo with Planar Mirrors
Authors: Yan Yu , He Bing Wei
Published: April 2013

This paper presents a new system for rapidly acquiring stereo images using a single camera and a pair of planar mirrors (catadioptric stereo). Firstly, the camera used to capture images is calibrated with matlab toolbox. Secondly, the position and pose of the planar mirrors relative to the fixed, calibrated camera is estimated, and this procedure is accomplished by calculating the symmetry plane of the real and reflected image corners of a chessboard. Thirdly, the relative orientation of two reflected virtual cameras is obtained. Finally, Gaussian noise is added to the image corners of the chessboard to verify the performance of the established stereo system. Experimental results show the effectiveness and robustness of our system.
Path Planning Based on EMD and Partial Distance Feature Vector Matching with Fuzzy Logic for Indoor Robotic
Authors: Zhang Zhi Jie , Yang Shuo
Published: April 2013

Path planning algorithm is an important research content of robotic. In order to improve its performance, we use earth move’s distance(EMD) and fuzzy logic as base tools, combine with distance feature vector matching and partial matching tech，by use the algorithms based on EMD and feature vector, we can get more faster and more accurate outcome, and at the same time, the algorithm could decrease the increase velocity of the search space from the scale of secondary power into the the scale of linearity.
The Presentation of the Quarternary Super-Wavelet Wraps and Applications in Material Science
Authors: Shen Jian Guo
Published: April 2013

Our goal is to obtain a character -ization of normalized tight frame super-wavelets The basis of materials science involves relating the desired properties and relative performance of a material in a certain application to the structure of the atoms and phases in that material through characterization. An approach for designing a sort of biorthogonal vector-valued wavelet wraps in four-dimensional space is presented and their biorthogonality traits are characterized by virtue of iteration method and time-frequency analysis method. The biorthogonality formulas concerning these wavelet wraps are established. A necessary and sufficient condition for the existence of the pyramid decomposition scheme of space is presented.