bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation Analysis of the Effects of Maintenance Policies on Manufacturing Line Productivity
Authors: Savsar Mehmet
Published: August 2013

A manufacturing line consists of a series of machines, which are subject to failures due to component deterioration and other random causes. While failures due to random causes are inevitable and need corrective maintenance (CM), failures due to component deterioration can be avoided by preventive maintenance (PM). Both types of maintenances can cause significant production losses, particularly if a proper PM policy is not practiced. Productivity calculations of multi-stage lines with storage units and maintenance operations can be quite complex. Furthermore, closed form solutions in equation forms are not possible when both preventive and corrective maintenances are incorporated into the model. In this paper, a simulation model is presented for a multi-stage line and line productivity is evaluated under different operating conditions and maintenance policies.
Experimental Studies of a Ranque-Hilsch Vortex Tube
Authors: Mohamad Azizul , Amin Nasrul Amri Mohd , Razlan Zuradzman Mohamad , Majid Mohd Shukry Abdul
Published: August 2013

Vortex tube is a device that separates a compressed flow of gas into two streams simultaneously, one giving kinetic energy to the other, resulting one hotter than the inlet temperature and one lower, without having any moving part. This research focuses on investigating the effects of various physical parameters on the performance of the vortex tube, namely cold nozzle diameter, length of the tube, and air mass flow rate at the hot end of the tube. In general, there are two major design features associated with the vortex tube, namely (a) maximum temperature differentials in vortex tube to produce small amount of air with very low and very high temperatures, and (b) maximum cooling/heating effect by producing large quantity of air with moderate temperatures. By considering the experimental results, an optimized set of parameters that contribute to the most efficient vortex tube design would be proposed depending on the desired design features.
Reconstruction Image of Discrete Structure of Materials by Projective Computer Tomography
Authors: Grebennikov Alexandre
Published: August 2013

We consider in this paper the Projective Computer Tomography (PCT) as an instrument for image reconstruction of objects with the internal simple discrete structure that consists of some separate elements inside of the homogeneous (or quasi homogeneous) substance in the considered domain. PCT consists in localization of intersections of prolongation of some known projections, obtained as images by some concrete tomography. Developed scheme is constructed as algorithms and MATLAB program package, which quality and rapidity is demonstrated on simulated numerical examples.
Experimental Study on Unsupported Nano-MoS2 Catalyst for Deep Desulfurization Fuel Oil
Authors: Zhu Yu Qin
Published: August 2013

Five kinds of unsupported MoS2hydrodesulfurization catalysts and the precursor of MoS2catalyst, nanosized MoO3, were synthesized by a novel hydrothermal reduction method. The influence of temperature, concentration of reactants and pH values on the growth morphology of MoS2was systematically investigated. The MoS2fibers showed lots of defects and they were easily bended, which increased the number of active sites on the catalyst and easily met the requirements of hydrotreating ultra-desulfurization of fuel oil.
Study on a Structure of 2,6-pyridine-dicarboxylic Acid Cobalt Calcium Hexahydrate
Authors: Liu Hai Xing , Xiao Jing Zhong , Guo Huan Mei , Zhang Qing Hua , Yu Zhang Xue , Zeng Guang , Ye Kai Qi
Published: August 2013

The complex C28H32CaCoN4O24has been synthesized from hydrothermal reaction and the crystal structure has been determined by means of single-crystal X-ray diffraction. The Co atom is six-coordinated by two N atoms, four O atoms from two 2,6-pyridinedicarboxylic acid. The Ca atom is eight-coordinated by two N atoms, six O atoms from two 2,6-pyridinedicarboxylic acid and two water molecular. The crystal packing is stabilized by O-H...O hydrogen bonding interactions.
Office Materials Impact to Perceived Working Environment Quality
Authors: Badida Miroslav , Senitkova Ingrid
Published: August 2013

Some common and new office material combination impact on perceived working environment quality used as surface interior materials is presented in this paper. Traditional and progressive materials comparison reveals new fact regarding the TVOCs concentration. Task of the study was to investigate the possibility of using individual material surfaces sorption ability. The chemical analysis and sensory assessments identifies health adverse of indoor air pollutants (TVOCs). The knowledge about the targeted use of sorption effect can be used already in the office working environment design phase. The results demonstrate the various sorption abilities of various indoor materials as well as various sorption ability of the same indoor surface material in various combinations.
Adaptation to the International Pollutant Control in Dynamic Framework
Authors: Lv Xian Jiao , Zou Xiao Yan
Published: August 2013

Most analysis of global warming are seldom analyses the countries adaptability to the climate change but may have an impact on the strategy of tackling global worming. Even if considered the influence, just works with the simple static model and not the dynamic model to analyze. This study is considering adaptation that is crucial for the analysis of the pollutant control problems in the dynamic framework. We show that the optimal trajectory and stock in the global optimality and Nash equilibrium respectively.
Comparison of Bending Stress of a Spur Gear for Different Materials and Modules Using AGMA Standards in FEA
Authors: Prabhakaran S. , Ramachandran S.
Published: August 2013

Gearing is one of the most critical components in mechanical power transmission systems.. This paper explains about the comparison of the geometry of spur gears for two different modules by modeling and mathematical equations, load distribution at various positions of the contact line and the stress analysis of spur gears using three-dimensional finite element method. The bending stresses were examined using three-dimensional finite element model.. These stresses of different modules obtained from the finite element analysis were compared and the considerable reduction of weight occurred was found and also the values are compared with the theoretical values. Both results agree very well. This indicates that the finite element method model is accurate.
The Stability Studies of the Message Transmission in CAN Bus
Authors: Liu Yu
Published: August 2013

The message transmission stability is very important for the design of the CAN bus system, which is related to the normal operation of the bus control system. The message transmission time is analyzed based on the Tindell scheduling theory, and the message transmission stability analysis is studied by means of probability analysis based on the second-moment method. An example in vehicle is calculated to get its message stability and the result is contrasted with the MONTE-CARLO method, and then the message transmission stability can be got using the method above; this will be the basis for calculating the stability of the CAN bus system, and provides the foundation for the further scheduling theory studies. It has great practical significe for CAN bus.
The Research and Simulation of a Prey Pursuit Algorithm
Authors: Yang Wen Chuan , Lin Guang Jie , Wang Jiang Yong
Published: August 2013

General prey pursuit problem used capture strategy between agents in limited grid space. In prey pursuit problem, there are a lot of problems such as occurrence of collision between agents, imperfection capture that can be produced from corner of restricted grid space. But, this causes actuality deficiency problem of experiment environment itself. In this paper, we propose an experiment environment that considers actuality and new capture strategy that using direction vector to solve prey pursuit problem that is typical experiment model of multi agent system. Therefore, we proposed continuous experiment space of grid space of circular type that is environment similar to the actuality world in this paper, and agents in proposed experiment space solved prey pursuit problem through direction vector that uses distance information and direction information between each others. The proposed method could capture prey effectively through using direction vector in new environment, and we solved imperfection capture and agent collision problem that happens in general research.
Research on Text Conceptual Relation Extraction Based on Domain Ontology
Authors: Li Dao Wang
Published: August 2013

At present, the ontology learning research focuses on the concept and relation extraction; the traditional extraction methods ignore the influence of the semantic factors on the extraction results, and lack of the accurate extraction of the relations among concepts. According to this problem, in this paper, the association rule is combined with the semantic similarity, and the improved comprehensive semantic similarity is applied into the relation extraction through the association rule mining relation. The experiments show that the relation extraction based on this method effectively improves the precision of the extraction results.
A Comparison between Moving Least-Square Method and Natural Neighbour Interpolation
Authors: Nie Zhi Feng , Li Xing Long , Wu Heng Heng
Published: August 2013

The construction procedures of shape functions in the moving least-square method (MLS) are complicated, in which many matrix multiplication and matrix inversion are included, so that the computational efficiency is low. Moreover, the choices of some parameters are influenced by the artificial factors, and the computational stability is poor. However, the construction procedures of shape functions in natural neighbour interpolation (NNI) are based on Voronoi diagram and its dual Delaunay triangulation, computational results are only related with the locations of the discretized nodes, and the computational stability is good. In order to study the differences in the computational accuracy, the computational efficiency, and the adaptability to the fitted objects between MLS-based shape functions andC1natural neighbour interpolant, the two higher-order continuous shape functions are introduced in surface fitting.
Flattening the Spectrum of Erbium-Doped Fiber ASE Source Combining with LPFG-Based Filter Technique
Authors: Wang Jian Gang , Bai Yan , Han Dang Wei , Zhou Hong , Zhang Wei
Published: August 2013

Through studying the basic principle of super-fluorescent fiber source and combining with internal and external gain flattening technique, the spectral flatness of erbium-doped fiber amplified spontaneous emission (ASE) source with two-stage double-pass configuration pumped by two laser diodes (LDs) is improved. By optimizing the lengths of two-stage erbium-doped fiber (EDF) and adjusting the pump power of two LDs,the powers of C-band and L-band are matching, and the spectral flatness is superior to 0.5dBm from 1535 to 1610 nm. Utilizing the long period fiber grating (LPFG)-based thermally-insensitive gain flattening filter (GFF) fabricated by ourselves, the spectral protrusion is flattened near the peak of absorption wavelength of EDF, which make the spectrum not only cover the range of C-band and L-band, also realize the spectral flatness is better than 0.8dBm in the range of 3dB bandwidth. Application of the fiber ASE source in fiber Bragg grating sensing system could decrease the multi-signal peak power imbalance.
Thermodynamic Properties of Mg-Ni-H Compounds Prepared Assisted by a High Magnetic Field
Authors: Liu Jing
Published: August 2013

The Mg2NiH4 hydrogen storage material was prepared by magnetic field assisted combustion synthesis (MACS). It is found that the high magnetic field promotes the formation of Mg2NiH4. The high pressure differential scanning calorimetry (HPDSC) test results indicate that the optimum hydriding and dehydriding onset temperatures are 434 K and 525 K, respectively. However, the peak temperatures associated with LT à HT are similar for all samples. The Vant Hoff results show that a high magnetic field has no obvious effect on the entropies and enthalpies of these compounds.
Study on Manufacturing Enterprise Domestic Factoring Risk Control Methods
Authors: Liu Bei Bei
Published: August 2013

Nowadays, more and more manufacturing enterprises carry out domestic factoring business, though they get a lot of interest, at the same time, face risk from all respects. How to control those risk becomes the manufacturing enterprise the biggest obstacle to carry out. It has important significance in theory and practice to put forward feasible measures to prevent risks to Chinese manufacturing enterprises factoring business development. The author summarizes three methods to prevent domestic factoring business risk, it points out the direction of manufacturing enterprise factoring development.
Hybrid Prediction Method of Aviation Unsafe Events Based on Grey Catastrophe and Regression Analysis
Authors: Gan Xu Sheng , Duanmu Jing Shun , Gao Jian Guo
Published: August 2013

In order to improve the prediction of aviation unsafe events, a hybrid prediction method of aviation unsafe events based on grey catastrophe and regression analysis method is proposed. At first, the catastrophe points (date) are found from original unsafe events data to establish the grey catastrophe model for predicting the future catastrophe points, and then the grey prediction model for these catastrophe points is built to calculate the catastrophe value corresponding to future catastrophe points. For non-catastrophe points, the appropriate regression analysis model needs to be established. Example validates its effectiveness.
Study on Interface Design of Bus Station Information Facilities in Korea
Authors: Yu Jie , Shi Ai Qin , Zhang Yi , Han Chang Jun
Published: August 2013

The urban public traffic information based on the digital technology has become a global trend. The person-centered barrier-free Public Transit Information Systems (PTIS) has been building in Korea, America, Europe and many other countries. Requirements for the design have been raised because of increasing demands of interactive design of PTIS. In this paper, by the investigation of PTIS in Korea in the spot, the interface information and design element of PTIS have been analyzed based on the bus station information facilities and the user experiences, and four typical designs of interface have been compared from the leading, the legibility and the design feeling of information transmit. The discussion on the design idea of the human-computer interaction way in public will contribute to the future industry design.
A Review of Tensioner for Automated Fiber Placement
Authors: Wang Zhi Bin , Han Zhen Yu , Lu Hua , Fu Hong Ya
Published: August 2013

For automated fiber placement machine, tensioner is one of the important modules, which precisely generates and controls the tension of fibers.This paper performs a system analysis and synthesis of the key technologies of tensioner in recent years by summing up the development course of the tensioner. A new type of tensioner specially designed for fiber placment technology is presented. Experiments results prove the feasibility of the proposed mechanism and control algorithm. In addition, this paper also aims at giving a perspective in such area in the future.
Solar Automated Greenhouse
Authors: de Santiago Rojas Enoch , Haaz Jorge Ivan Moncada , Rabago Bernal Felipe de J. , Dominguez Adan Rodriguez
Published: August 2013

This paper describes the design and implementation of a solar powered automated greenhouse. The objectives are to automatically control the environment, irrigation, and fertilizer to plants in the greenhouse. Another aspect is that its operation is suitable for anyone without knowledge in greenhouses, computers, electronics, etc. Specific objectives are: Control the gain of the low temperature by means of a sensor and actuators that extract fans as hot air and introduce fresh air, and a lamp to increase the temperature if necessary. Control the relative humidity by means of a sensor and valves that open to introduce water and fertilize if necessary. Control the charge and discharge of the battery to avoid prejudicing its life. Develop a modular, user-friendly and simple to operate. Battery is charged by solar cells. This greenhouse can be installed in remote towns where electricity is not available.
Computational Fluid Dynamics Simulation of Influence of Different Intervals of Product to the Huge Cold Store
Authors: Xie Jing , Miao Chen , Tang Yi , Wang Jin Feng , Zhao Yue
Published: August 2013

The cold store has developed rapidly since 1990s in China. The unreasonable air flow distribution in cold stores hasn't been solved effectually because of lacking of experimental methods. The uniform air flied can improve the effect of store and save the refrigeration cost in the store. In this article, the air flow distribution was simulated with different intervals between products in a huge commercial cold store based on the previous simulation and experimental experience. The results showed that the interval of 10cm between products at vertical direction was better than that of 15cm for storage.
Catalytic Cracking Light Cycle Oil Solidifying Point Soft Sensor Based on SVM
Authors: Wang Jing Fang
Published: August 2013

Genetic Algorithms and Support Vector Machines are introduced first in this paper. A mathematic model for predicting the solidifying point of light cycle oil of catalytic cracking unit is developed on the basis of the practical data. Results of on-line calculation show that the deviation between the predicted value and is fit to width.This model by way of the soft meter is used to optimize real time unit operation.
Automated Assembly Simulation Using Arena Software
Authors: Sithebe Thembelani
Published: August 2013

Most research has been concentrating on getting input from and simulating specific assembly processes. The most advanced simulation research is based on data driven methods. The rest of simulation articles are case study based.
This work envisages establishing a generic simulation process, which will be based on the generic algorithm and generic assumptions to be used to simulate an automated assembly process. The simulation model is based on proposed configuration and operational information. It is used to verify that the proposed system will meet required production rates and, to predict the relative performance of alternative configurations.
It can be used for what-if analysis to investigate different operation scenarios and optimize production systems. Validation of the result was done through the use of different scenarios. It is only by using the model to answer specific questions about ways of changing the system that realizable improvements are identified.
Computing the Solution of Cauchy Problems of a Class of Nonlinear Heat Conduction Equation on Turing Machine
Authors: Lu Dian Chen , Song Shao Jian
Published: August 2013

The computability of the solution for the Cauchy Problems of the nonlinear Heat Conduction equation is studied in this paper. A nonlinear map is defined from the initial value to the solution . We used the relevant knowledge of type-2 theory of effectivity, functional analysis and Sobolev space to prove that when , the solution operator of the initial problem for the Heat Conduction equation is computable under certain conditions. The conclusion enriches the theories of computability.
Dynamic Analysis of 3D Roll Forming Equipment in Mechanical System
Authors: Yang Zhen Feng , Li Qiang , Guan Yan Zhi
Published: August 2013

In this paper, the high-strength steel three-dimensional roll forming production line prototype is studied. The dynamic differential equations of 3D roll forming machine mechanical systems are established by the principle of dynamic balance. The dynamic differential equations are solved out by using MATLAB with the engineering example finite element simulation data. The dynamic characteristics of the forming process of 1.5mm TRIP590 high-strength steel sheet are obtained by the System response. The results can help to improve the performance of the prototype mechanical systems.
Development of an Instrumentation and Control System Learning Material Using LEGO Education System
Authors: Abbas Hawsawi , Kanai Norikane
Published: August 2013

The control engineering technology is a huge field of study. Above all, the instrumentation and control, likewise the plant automation has been classified as a special field of this technology. In this thesis we are introducing a practical learning material system that deals with instrumentation and plant control theory using LEGO Mindstorms and LEGO Bricks. There are different parts in the plant such as field instruments, controllers and analyzers, which are linked together to maintain a stable level of production. We are assuming that colleges and new employer will be able to use the developed system.
Motion Simulation of a Deployable Concentrator
Authors: Wang Lei Lei , Xia Jiang Ling
Published: August 2013

To overcome the insufficient focusing efficiency of inflatable membrane solar concentrator after deployment, parametric design of a plurality of small size pre-forming reflection mirror was carried on by Pro/E software, and assembled into a mechanical concentrator structure. The expected motion process form folding state to working state was simulated. Unfolding trajectory curves and location curves are obtained. This will provide reference to deployable concentrator design and experiment.
The Development of Wrist Rehabilitation Assistive Devices Using a Shape Memory Alloy
Authors: Chiu Min Chie , Yeh Long Jyi , Hung Tz Chi
Published: August 2013

For the purpose of wrist rehabilitation, a new type of SMA (Shape memory alloy) wrist rehabilitation device is developed. The palm will be actuated/lifted by the SMA’s driving force when the shape memory alloy is heated up. Four wires of the shape memory alloy (SMA-Ti50Ni45Cu5 with 1.0mm in ψ) are bundled and passed through a fixed plastic block. The whole set of the SMA wrist rehabilitation devices can give support to the palm’s bending mechanism. A 500(g) adult palm is presented in the experimental work. In order to actuate/lift the palm at a sufficient rehabilitation angle, an electrical circuit of 10(A) is adopted. Consequently, the issue, here, is to present a new type of SMA wrist splint that is used to provide a specified rehabilitation angle for the wrist.
Blocked Polyurethane/Tetrabromo Vinyl Ester Interpenetrating Polymer Networks: Thermal and Flame Retardant Properties
Authors: Chen Chin Hsing , Sun Yu Yun
Published: August 2013

The thermal and flame retardant properties have been studied in blocked polyurethane (BPU)/tetrabromo vinyl ester (BVE) full-interpenetrating polymer networks (full-IPNs) by simultaneous polymerization (SINs) method. The studies of thermal properties of IPNs are based on the heat deflection temperature (HDT) and vicat softening temperature (VST). Results show the HDT and VST of IPNs decreased with increasing BPU content. In the meantime, the HDT and VST of BPU/BVE IPNs with filler (kaolin) are better than that of without the filler. The studies of flame retardant properties of IPNs are based on limited oxygen index (LOI) and UL-94. The IPNs showed the excellent flame retardant properties when the IPNs decreased the BPU content.
The Research of Structural Parameters on Natural Frequency of Laminated Composite Plates
Authors: Zhao Fei , Wu Jin Wu
Published: August 2013

In this paper, natural frequencies of laminated composite plates were studied. The layerwise finite element model is imposed to determine the natural frequencies of laminated composite plates. The effects of panel orientation angle, elastic modulus ratio and width-depth ratio on the natural frequencies of the laminated composite are then discussed. With an example of a sixteen-laying laminated plate, the numerical simulations show that the factor of key structural parameters to the natural frequencies of the laminated composite plate is panel orientation angle and width-depth ratio.
Discussion of Seepage Calculation for Geomembrane Earthrock Dams
Authors: Peng Yun Feng , Jiang Kun
Published: August 2013

As a new kind of seepage control material, the geomembrane has been widely used in earthrock dam, yet the seepage calculation of the geomembrane earthrock dam has not been studied on theory. Based on seepage mechanism in geomembrane, this thesis classifies the seepage into two types: one is permeability of geomembrane itself; the other is defect leakage flux in geomembrane. Based on feedback analysis of geomembrane earthrock dam with observation data, the permeability coefficient of geomembrane can be obtain on average, so the problem that the defects in geomembranes are difficult to ascertain is solved. At last, the sources of error in seepage calculation for geomembrane earthrock dams by method of clay equivalency were discussed. Analyzed the count error, and corrected the mathematical model.
Bio-Degradable Glass for Neural Probe Application
Authors: Lim Rui Qi , Tan Kwan Ling , Chen Wei Guo , Je Mink Yu , Yee Tack Boon , Cheng Ming Yuan
Published: August 2013

This work presents a bio-degradable glass probes and its biocompatibility assessment for neural applications. The probes can be implanted into different sites of the human brain for recording and stimulating purposes. Current existing neural probe address the probe stiffness requirement for the penetration of brain tissue. However, this requirement normally resulted in the rigidity of the probe which is non-compatible with the brain tissue movement for long term implantation. The brain neuron cells will be damaged by too rigid probe substrate. In order to address this issue, bio-degradable glass probes having sufficient stiffness for a smooth brain insertion as well as ability to degrade after implantation; leaving behind the flexible circuitry substrate was being explored. The biodegradability of the proposed probe was evaluated.
On the Dynamics of a Micro-Beam Driven by a Traveling Harmonic Force
Authors: Tu Wei Hsiang , Chang Pei Zen , Lee Chih Kung , Hu Yuh Chung
Published: August 2013

There is no literature mentioning the dynamics of a micro beam on which a harmonic force traveling to and fro. This article is the first to present the dynamics of a micro beam subjected to a traveling harmonic force, especially the effects of the frequencies and traveling speed on the dynamics of a micro beam. According to analytical results and the simulation results by ANSYS, the resonant frequencies of a micro-beam will be bifurcated by the traveling harmonic force. One frequency of the external force may simultaneously excite two vibration modes at some particular traveling speeds. The micro structure may become unstable at particular traveling speed.
Study of Motion of Impurity Ions Making Influence on Electrical Properties of Polymer Solids in Low Frequency Range
Authors: Anada Yui Chi
Published: August 2013

The motion of impurity ions affects the electrical properties of polymer solid. The ions move through free spaces which exist in the non-crystalline part between polymer crystallites. The free spaces have inhomogeneous size distribution depending on a property of polymers or crystallization conditions. The homogeneity or inhomogeneity of the size of the free space affects the ionic motion, and consequently it also affects the electrical properties of polymer solids. In order to study the electrical properties of polymer solids in relation with such motion of impurity ions, the conductivity relaxation time was calculated for isotactic poly (propylene) (iPP), low density poly (ethylene) (LDPE) and plasticized poly (vinyl chloride) with dioctyl phthalate (p-PVC) from the electric modulus as a function of frequency which was observed by means of the Broadband Dielectric Spectroscopy (BDS). The value of the conductivity relaxation time reflects the non-crystalline structure of these polymers.
Application Research on Composite Foundation of Rammed Soil-Cement Piles Applied in the Da-Guang Expressway from Gu'an to Shenzhou
Authors: Mu Huan Sheng , Gao Ling
Published: August 2013

Through the practice of tamped cement soil pile in treatment of soft soil foundation in Guan to Shenzhou section of Daqing-Guangzhou Expressway, the author expounds the action mechanism of rammed soil cement pile, composite foundation design points and calculation method of bearing capacity characteristic value.
Minimum Input Energy Trajectory Design of the Mechatronic Elevator System
Authors: Chen Kun Yung , Huang Ming Shyan , Fung Rong Fong
Published: August 2013

The mechatronic elevator system driven by a permanent magnet synchronous motor (PMSM) is modeled by both the mechanical and electrical equations. The dimensionless forms are also derived for the purpose of practicable movements. In this paper, the minimum-input energy trajectory (MIET) and minimum control effort trajectory (MCET) based on Hamiltonian function and the five-degree (5-D) normalized polynomial trajectory are designed and compared. From the numerical simulations comparisons; it is found that the MIET has the minimum input absolute electrical energy (IAEE).
Direct Use of the Kozani-8 Well, Geothermal Water through an Integral, Cascade and Hybrid Scheme and its Economic Analysis
Authors: Kodhelaj Nevton , Bode Aida , Çela Bashkim , Aleti Riza , Thodhorjani Spiro
Published: August 2013

Albania is relatively rich with low up to the middle enthalpy, with waters coming out as natural springs (12 springs) and wells (10 wells). The water temperature blowing out of the wells varies from 34°C up to 65.5°C to Kozani-8, the most important among the Albanian geothermal wells. It had been drilled in 1989. Finding of the hot brine was considered and accident at that time, as the well had been designed and drilled to search oil &gas. The well is located on the hills, 26km SE of Tirana. It encounters limestone strata at 1819m, penetrating over 10m into this section. The yield of the well is 10.3 l/s, and is presented stable from more than 23 years. The geographical position of the well, placed in the middle of a village, very close to the Corridor 8, are some of the most important parameters on choosing these waters for our designs and the related calculations. The recreational center provides the cascade and integral use of the Kozani-8 geothermal water, but not only. It also provide the electricity generations, through a hybrid system. The center will be also equipped with SPA, open and closed pools, fitness, massages, greenhouse & also aquaculture pools. The economic analyses, based on the NPV calculations, shows that this resource is completely competitive, and is unjustified its further waste. Despite the fact that the investment is too high (over 5.5 million Euro), it is completely feasible, and this is proven also by the risk analyses. It will also help on improving the living standards for the local community.
Analysis and Prediction of Bore Pressure Based on BP ANN
Authors: Tan Xiu Hui , Bai Yan Ping , Shen Da Wei
Published: August 2013

The rule of Fire bore pressure and the maximum bore pressure point are very important problems in interior ballistics. This paper analyzed the characteristics of the bore pressure by an improved BP neural network, furthermore predicted the maximum bore pressure by the net-work well trained above. First, an improved three-layer BP neural network were established ,and trained by low frequency (20kHz) pressure data, and then several high frequency (50kHz,100kHz,200kHz) pressure data were fitted by the same network, furthermore the maximum bore pressure and the time of the maximum bore pressure were predicted by the network. Compared with the actual measured data, it was shown that this method also applied to the high frequency pressure data, and had a high fitting accuracy and prediction accurate. Above all, it proved the method is feasible and generic, can be applied to related dynamics problems, and has a value for application.
Design of a Power Transformer for a LLC Resonant Power Converter
Authors: Liu Chen Yao , Liu Kuo Bin , Huang Din Goa
Published: August 2013

We designed and implemented a power converter to provide a dc power bus for the MCOR 12 correction supply. The characteristics of the dc power bus are variable frequency at both heavy and medium or light loads. These characteristics match the working requirement of the correction supply. The dc power bus has a relaxation oscillator that generates a symmetric triangular waveform, to which MOSFET switching is locked. The frequency of this waveform is related to a voltage to be modulated with feedback circuitry. As a result, the circuit and complex transformer are driven with a half-bridge. We designed the complex resonant transformer and describe in this paper a simulation model that is highly important, thus to exploit its frequency-dependent transfer characteristics. We obtained a power bus with small ripple to provide the correction power. The high-performance characteristics of the resonant dc power bus are illustrated in this paper.
Orientation Control and Dielectric Properties of Ba0.6Sr0.4TiO3 Thin Films on Pt/Ti/SiO2/Si Substrates with PbO Seeding Layer
Authors: Sun Xiao Hua , Qiao Ya Xia , Hou Shuang , Yang Ying , Huang Cai Hua
Published: August 2013

Ba0.6Sr0.4TiO3 (BST) thin films were fabricated by solgel technique on Pt/Ti/SiO2/Si substrate without and with PbO seeding layer from precursor solutions with different concentrations. The crystal structure, surface morphology, dielectric properties and leakage current density of BST thin films are investigated as functions of the concentration of PbO precursor solution. Its found that the growth orientation of BST thin films with PbO seeding layer can be modulated through adjusting the concentration of PbO precursor solution. BST thin film with PbO seeding layer from 0.05 M precursor solution shows the highest dielectric constant and tunability, which may be attributed to the high crystallization and amplitude of the polarization in high (100) preferred orientated films. The leakage current density of BST films increases with the increasing concentration of PbO precursor solution and agrees well with the space-charge-limited current mechanism at room temperature.
Study on the Mechenical Properties of PPC/PLA Blends Modified by POSS
Authors: Chen Yi , Peng Yue , Liu Wen Yong , Zeng Guang Sheng , Li Xiang Gang , Yan Xue Hui
Published: August 2013

Aliphatic polycarbonate Polycarbonate/poly (lactic acid)/(PPC/PLA) blends were prepared by melt blending, 1,2-propanediol isobutyl POSS (P-POSS) were added into the blends as a compatilizer and reinforcer. The morphologies, mechanical properties and rheological properties of blends were investigated systematically. The results showed that the adding of P-POSS could improve the compatibilization of PPC and PLA obviously. The thermal stability of the blends was enhanced but the crystallization was effected slightly. Moreover, the tensile strength and impact strength of blends exhibited a considerably increase.
Planarization of 2 ̋ Sapphire Wafer Using Magnetic Abrasive Polishing Process
Authors: Kim Sang Oh , Kwak Jae Seob
Published: August 2013

In this study, the process of magnetic abrasive polishing (MAP), installed permanent magnet to improved magnetic force on surface of wafer, was used for planarization of sapphire wafer. The surface roughness and polished area were investigated according to polishing time. The results showed that the improving strategy of magnetic force was helpful to improvethe roughness of sapphire and the polished area was gradually increased according to polishing time since the frictional heat between magnetic abrasives and wafer surface caused the improvement of fluidity for magnetic abrasive. In addition to, for using medium based on oil, the better improvement of surface roughness was achieved comparing to silicone gel medium of high viscosity.
Nighttime Monitoring and Assessment Technology of Subgrade Settlement for Chengdu-Guanxian Line during Operation Period
Authors: Su Qian , Jiang Wei , Jiang Kai , Li Yu Jie , Yang Ling Ling
Published: August 2013

The criterion for residual deformation of Substructure of ballasteless track on railway passenger dedicated line is extremely strict in order to satisfy the safety and comfort requirements of the high-speed train during operation period, urgent need to strengthen the ballastless track lines settlement deformation observation, prediction and assessment technology. Based on Chengdu-Guanxian line, this paper puts forward observation programs of subgrade settlement combined with the characteristics of Subgrade Settlement through the analysis of the influence factors of subgrade settlement deformation and key consideration about the factors of nighttime observation precision. It shows that the monitoring and assessment technology could meet the requirements through the analysis of field data, it can be guidance of railway management departments to make maintenance plan. Some advices provide reference for the monitoring and assessment of high-speed railway subgrade settlement during operation period.
One Step to Prepare Ag/PPy Composites with Different Soft Templates
Authors: Li Mei , Teng Hong Wei , Li Wen Guang , Liu Jun , Liu Ying Kai
Published: August 2013

Ag/PPy composites were prepared in β-naphthalene sulfonic acid (β-NSA) or sodium dodecyl sulfate (SDS) aqueous solutions with AgNO3 as oxidant. β-NSA or SDS acted as dopant and soft template in the process of preparing polypyrrole (PPy) by in situ oxidizing polymerization method. SEM, TEM, FTIR, XRD and Four-Point Probes Resistivity Measurement System were tested respectively and results indicated that the obtained Ag/PPy composites displayed different morphology,structure and conducting characteristic.
Mechanical and Chemical Stabilisation of Carbonatesand
Authors: Grine Khaled
Published: August 2013

This paper describe a laboratory investigation into the effects of adding silica sand and/or cement on the behaviour of artificial carbonate sand under shear and compression. Drained shear and compressibility tests have been performed on artificial carbonate sand samples and artificial carbonate sand samples mixed with different proportion by weight of silica sand and/or cement in order to determine the shear stress-strain and compressibility characteristics of the mixed material.The results demonstrate that contraction during shear and compressibility during isotropic compression decrease as the fraction of silica sand and/or cement increases within the artificial carbonate sand.A positive volumetric change (dilation) during shear is more obvious with cemented samples. It also demonstrate how the addition of a combination of silica sand and cement produces the most effective improvement in terms of strength, stiffness, compressibility and crushing.
Study on Surface Subsidence and Separation Range Thick Seam Mining of Daping Mine
Authors: Xu Meng Lin , Zhu Xun Guo , Zhao De Shen
Published: August 2013

In order to study the surface subsidence and separation range features during the mining process in in thick seam mining of Daping mine , it takes the typical coal of mining in S2S9 face of Daping Mine, using the resemble simulation to study on it. The study showed that the subsidence amounted to less than the maximum under the geological and mining conditions, In the single-face mining conditions, when the face length is generally not more than (1/3-1/4) H.The mining thickness cannot deflection in the form completely transmitted to the surface, but abound in overburden bed rock mass formed within the fracture and caving into the residual space. This research can be a reference for safety and high efficient coal mining of other working face in Daping Coal Mine.
The Investigation and Countermeasures Research on Farmland Abandonment
Authors: Luo Lan , Zhang Shi Yang , Zhang Jia Huan , Tang Dong Mei , Fang Qing , Cai Yong , He Song Tang
Published: August 2013

Farmland is an important guarantee for national food security. With the acceleration of industrialization and urbanization in China, continuous decrease in arable land and farmland abandonment have become a common phenomenon, which is directly threatening the national food security. This study took the typical rural farmlands around Chengdu as research subjects. Through on-site investigation on farmland abandonment phenomenon in the three representative regions, including Longquanyi District, Chongzhou City and Qionglai City, and questionnaire surveys on rural population information, outflow of rural labors, economic status of rural family, farmland use status and effects of policies, the result shows that the three regions have different levels of farmland abandonment, which is primarily caused by land transfer and inflow of external capitals. This study proposed the corresponding countermeasures and suggestions on the basis of cause analysis.
A New Method Using Liquid Chromatography Tandem Mass Spectrometry to Detect NDMA in Water
Authors: Zhang Chao Jie , Zhang Geng , Chen Lu Ting , Chen Qian , Zhou Qi
Published: August 2013

This study focused on using liquid Chromatography Tandem Mass Spectrometry to detect N-Nitrosodimethylamine (NDMA) at trace concentrations in water. The water sample was preconcentrated by solid-phase extraction method. To find an elution which can obtain higher recovery, three reagents with different organic solvents were examined. After comparing the recoveries and the standard deviation of the elution, finally the dichloromethane was determined as the elution of the experiment. Then the concentrated sample was analyzed by a method combining SPE pretreatment and LC separation with tandem mass spectrometry using multiple reaction monitoring (MRM).
Taxi Intelligent Dispatch System Based on GPS
Authors: Yao Zhong Min , Long Zhao Peng , Li Qiang
Published: August 2013

GPS positioning system is installed in taxis and most mobile phones support GPS positioning function at present. GPS phones are used in the taxi to achieving intelligent scheduling based on this basis. The taxi intelligent dispatch system based on GPS is proposed, improve the traditional Dijkstra scheduling algorithms by setting taxi maximum reasonable scheduling range, experimental results show that improved algorithms reduce the time complexity and improve scheduling efficiency. Meanwhile the traffic jam information can be sent to the dispatch center and make scheduling algorithm more reasonable by combined with above information.
The Research on Heat Transfer Coefficient of Wheel Rims of Large Capacity Steam Turbines
Authors: Han Wei Min , Zhou Yan , Zhang Heng Liang , Xie Dan Mei
Published: August 2013

Several models for calculating the heat transfer coefficient of wheel rims of large capacity steam turbines are presented. Taking a certain 600MW supercritical turbine rotor as an example, the heat transfer coefficient of wheel rim under cold start-up are analyzed and calculated, according to the and comparison, and the quantitative calculation results are given The results show that the heat transfer coefficient of rotor rims obtained by Sarkar method is close to the heat transfer coefficient obtained by a research institute based on a rib heat transfer model. In finite element analyses, the calculation results by mentioned method could provide the heat transfer boundary condition of temperature and thermal stress field calculations of supercritical and ultra-supercritical steam turbine rotors.
The Techniques in Developing Finite Element Software for Creep Damage Analysis
Authors: Liu De Zheng , Xu Qiang , Lu Zhong Yu , Xu Dong Lai , Xu Qi Hua
Published: August 2013

There is a need for a computational tool for analyzing creep damage problems for the research community and high temperature industries, and dedicated in-house software still has its merits and advantages. This paper reports the development of such software including the development of finite element algorithms based on CDM for creep damage analysis, and the use of some standard subroutines in programming, and sample of validation.
Analysis of Combustion and Emission Characteristics of Diesel, Natural Gas Dual Fuel Engine
Authors: Guan Xiao Le , Zheng Wei Gang
Published: August 2013

Research on combustion characteristics of diesel, natural gas dual fuel engine, and to analyze the influence of pilot diesel fuel supply system parameters on the combustion characteristics of dual fuel engine. Based on the experiment, firstly comparing the combustion characteristics of diesel engine with diesel, natural gas dual fuel engine, and compared the effect of load on the combustion characteristics of dual fuel engines, and specifically elaborated the load, speed, rate of substitution, effects of ignition oil quantity, inlet concentration of the mixed gas, the fuel supply advance angle and other factors on combustion changes of dual fuel heat release rate, pressure, discharge characteristics.Analysis of the natural gas / diesel dual fuel engine is currently studying the existing problems of key technologies and development prospects.
Effects on the Structures and Properties of APMOC Fiber from Hydrothermal Aging
Authors: Chen Fei , Yue Ying Juan , Sun Wen Xia , Du Hai Xia
Published: August 2013

By the test of hydrothermal aging, the effect on the structures and properties of APMOC fiber is studied, while monofilament tensile test and the corresponding structural analysis are carried out on the test samples. The results show that, in the range of experimental temperature and humidity, APMOC had no significant change in molecular structure; after hydrothermal aging, the tensile strength, elongation and elastic modulus of APMOC fiber show some fluctuation, instead of downward trend continually, there are more obvious effects on the changes of the tensile strength from temperature, i.e. the higher the temperature, the lower the tensile strength during the process of aging. The general effect of thermal aging on fiber properties are the embrittlement and the decreased elongation. The microscopic mechanism of fiber failure modes from raw fiber splitting to brittle rupture is interpreted through the scanning electron microscopy (SEM) observation on the tensile fracture before and after aging, combined with the skin core structure characteristics of APMOC fiber.
Influence of Composite Modifier on the Modification of Calcium Carbonate Powder
Authors: Yue Zhang , Yu Mei Yan , Li Lang Chen
Published: August 2013

The modification of CaCO3powder was studied by the composite modifier in n-butanol and water solution. Aluminate coupling agent (ACA) and stearic acid (SA) were added as the composite modifier. The characters of modified CaCO3were investigated by the contact angles and infrared spectroscopy (IR). It was found that the contact angles/water of modified CaCO3powder increased with the increase of SA/ACA weight ratio, and showed a maximum when ratio was 0.8:1. The contact angles/water of modified CaCO3powder obtained in optimum conditions was 136.5°. The results indicated that the surface character of CaCO3powder exhibited hydrophobic properties. When adding the active CaCO3into PE (the weight ratio of CaCO3/PE about (20:100), the mechanical properties of PE were remarkably improved.