bluuebunny/crossref_metadata_2025 huggingface dataset:
Geotechnical Engineering Anti-Leakage in Unstable Mountain
Authors: Yang Hua Shu , Peng Xin Long , Fu Bi Chang , Yang Yu Lu , Wang Yi , Wang Xue Peng , Pu Ying Ju
Published: December 2013

Effective unit weight, inner friction angle and cohesion are the main engineering indices of rock-soil mass anti-slide. Deviant leakage brings about obvious decrease of effective unit weight, inner friction angle and cohesion under combined action of thrust, buoyancy, and lubrication. So as to slip in unstable rock-soil mass. Deviant leakage schleps out weensy particles, induces seepage failure, so geotechnical engineering would collapse. Therefore the reasonable anti-leakage in unstable mountain is one of the key technologies that urgently to be solved in geotechnical engineering. Combined with the typical landslide geology, several groundwork anti-leakage were studied for earth-rock dam, correlative processes and technologies were discussed, and construction parameters were designed. The abnormal situations that may occur in construction were analysed, and preparative schemes were put forward. The results had been validated in practical engineering.
FBG Sensor Application for GFRP Soil Nailing Pull-Out Test
Authors: Jin Qing Ping , Zheng Zu Jia , Dou Bin Qiang , Lei Xue Wen
Published: December 2013

The mechanical performance of GFRP soil nailing in the supporting structure is an important and difficult problem. By implanting the fiber bragg grating sensor (FBG) into GFRP soil nailing, pull-out tests were done on filed,and stress rules of soil nailing bar were determined.The more reasonable and effective force data of soil nailings were also gathered through FBG senor.Test results show that the tension of soil nailing gradually adds with external pulling force, the variation of tension is divided into two stages, the total pulling force is within 50kN, growing linearly with about 2.5% rate ,after that, its growth rate is approximately 50% to 60%. After the force exceed a certain value, the load is transmitted backward.FBG sensing technology overcomes the failure problem of traditional strain sensor,is a precise measurement method.
Simulation and Optimization on GFRP Soil Nailing Support
Authors: Jin Qing Ping , Zheng Zu Jia , Chen Zhi , Lei Xue Wen
Published: December 2013

Glass Fiber Reinforced Polymer (GFRP) soil nailing is great different from steel bar soil nailing in mechanical parameters and the properties. According to a excavation engineering supported by soil nailing, the support structure of soil nailing was simulated by finite element method. By analyzing the displacement, the force, the plastic area and other aspects in sensitive position, the results show that two types of soil nailing can ensure the stability of the slope under the same arrangement. The maximum displacement of GFRP soil nailing on control points of the slope is more 7% to 10% than steel bar soil nailings. Plastic zone of GFRP soil nailing support structures are more obvious in the range and the extent. The arrangement of GFRP soil nailing had been optimized by finite element software, the distance 1.6~1.8m between soil nailings is more appropriate for support structure.
Experimental Study of C Band Passive Microwave Remote Sensing of Soil Moisture
Authors: Gao Xiao Liu , Zhang Hui Hui
Published: December 2013

Passive microwave remote sensing is one of the most effective methods for inversing soil moisture. Under the condition of laboratory, firstly, C band microwave radiation was used to achieve the trial of ground-based remote sensing soil moisture, and then regression analysis was carried out according to the data measured, finally, got the C band experience regression model of soil moisture inversion. The results showed that: in the level-off state of soil surface, soil humidity and soil microwave emission rate is linear negative correlation, in the other words, soil microwave emission rate decreased while the soil moisture increased. Besides, with the increasing of soil surface roughness, both the value of microwave polarization index (MPDI) and microwave emission rate polarization difference Δe have the same trend of quick drop, stabilization and slow raise, and it presented the relationship of quadratic curve with the change of roughness.
Pull-Out Tests of Deformed Bars from Ferrous Mill Tailing Concrete
Authors: Zheng Yan , Kang Hong Zhen , Wang Guang Qi
Published: December 2013

For application of FMT (ferrous mill tailing) to structural concrete, it is urgent need to study the bond behavior of reinforced bars with FMT concrete. In this paper, 72 pull-out tests of HRB335 steel bars from FMT concrete were carried out. The test phenomena and various factors influence on bond behavior were obtained. The results show that the bonding performance between deformed bars and FMT concrete is approximate to that of deformed bars and ordinary concrete. The results should provide technical support for application of FMT concrete in building structures.
Analysis on Fire-Resistance Performance of Slabs Strengthened by Carbon Fiber Sheet Bonded with Inorganic Adhesive
Authors: Wan Fu Xiong
Published: December 2013

Fire-resistance performance of slabs can be improved if the slab strengthened by carbon fiber sheet bonded with inorganic adhesive instead of organic epoxy adhesive with low softening temperature. However, Fire-resistance performance of the strengthened slabs is not understood fully. Considering this issue, finite element analysis is done. Stating from building valid model of finite element, computing results are compared with experimental results, and rationality of the model is verified. Then plenty of parameter analysis is done. Effect of some parameters, such as range of carrying capacity increase by sheet, reinforcement ratio, load ratio to carrying capacity and thickness of slab, on fire-resistance performance of the strengthened slab is analysis. The results demonstrate that thickness of slab is the main factors influencing fire-resistance performance of the slab strengthened by carbon fiber sheet bonded with inorganic adhesive. While, range of carrying capacity increase by sheet, width of section and load ratio to carrying capacity have little influence on it. Slabs, strengthened by carbon fiber sheet bonded with inorganic adhesive, and protected by Thick-typed Fireproof Coating, perform good fire behavior.
Numerical Analysis for Geometry Nonlinear Characters of Laminated Box Beam Columns
Authors: Wu Ya Ping , Zhang Jia Wei , Zhao Yu Ru , Wang Yin Hui
Published: December 2013

In the action of bending load and axial compression, the deflection of the beam presents character of geometry nonlinear. For the thin-walled carbon fiber laminated box beam column, the beam deflections not only relate with load but also with the ply angle of layer, span width ratio. By using the method of numerical, this paper analyzed and summarized the beam deflection variation with the span width ratio, ply angle, the axial compression ratio for the simply supported laminated box beam column under the axial compression and bending load.
Initial Temperature Influence to the Rectangular Plates Free Vibrations under Different Types of Boundary Conditions
Authors: Poddaeva Olga I. , Fedosova Anastasia N.
Published: December 2013

In the paper we have investigated the power of temperature influence to rectangular plates fundamental frequencies depending on subject to plates fixing and thermal conditions at plate edges. We have shown the power of thermal stresses influence to plate vibration process is directly connected not only to the initial plate temperature, geometry and material, but also to the type of boundary conditions. Thus, rigidly fixed edges enlarge the thermal stress effect.
Modal Parameters Identification of Civil Engineering Structures Based on the Random Decrement Technique
Authors: Pei Qiang , Li Long
Published: December 2013

Modal identification technique is an effective measure for building materials health diagnosis, structural optimization design and safety assessment in structural engineering field. The time-domain method can only use the response signals to identify the modal parameters under ambient excitation, which became a wide concern topic in recent years. According to the points above, the theories of random decrement technique, complex exponential method and time-series method are presented. The random decrement technique is combined with the other two methods to become joint algorithms. A numerical simulation model is constructed to verify the feasibility and validity of the two joint algorithms.
Study on Truss Structure Damage Identification Base on Residual Force Vector
Authors: Zou Wan Jie , Zhang Yun Xia , Li Chuan Gao
Published: December 2013

By using the intrinsic character of the truss structure, a new direct damage identification method of the truss structure based on residual force vector is presented. The stiffness connectivity matrix is got by sensitivity analysis, and it can be used to expand the stiffness perturbation matrix of damage structure, then, a new residual force vector is got, it can be solved directly, so the stiffness perturbation of structure is got, by it, the damaged locations and the extents of the truss structure are identified. At last, a hyper static truss structure example is given, the identification result shows that, only needed the first-order mode of the damaged structure, the damage can be identified accurately.
Investigation on Wind Tunnel Blockage Effects of High-Rise Building
Authors: Tang Huan , Wang Lei
Published: December 2013

As the significant difference in wind tunnel data between two scaled models of a practical engineering, the cause of this difference, which was regarded as blockage effect, was analyzed in this paper. Research shows that, for wind tunnel test with more surrounding buildings, blockage effect may result in serious data distortion, especially for lateral wind pressure, and existing correction method does not possess universality. Moreover, blockage ratio, as a global concept, is not appropriate to evaluate blockage effect of wind tunnel pressure data at different parts of building models. This study has reference value for blockage effect of wind tunnel pressure date in practical engineering.
Stochastic Analysis to Truss Spar Platform in Deep Sea
Authors: Wang Yan , Gao Rui , Yang Ling Qiang
Published: December 2013

Truss spar model was tested using regular waves in a wave basin and the responses in surge, heave and pitch were measured. A program was developed to determine the responses using numerical method. This program was run using the model parameters. The results are agreed well with the corresponding results obtained from the test measurements. Then this program was applied to a prototype spar simulated results were compared with the corresponding numerical results and test measurements.
The Evaluation Model of Fuzzy Analytic Hierarchy Process in Water Project of Xiasha District Based on Entroy Weight
Authors: Qin Peng , Zhang Zhe Yu , Qin Zhi Hai , Zhou Jian Fen
Published: December 2013

The post evaluation of Water Project in Xiasha district is taken as the object of study.The social influence of the project is evaluated from different parts according to the fuzzy analytic hierarchy process. Subjective and objective weights are combined to form the combined weight,taking the minimum information entropy as a tool.The fuzzy AHP comprehensive evaluation model of Water Project social influence in XiashaDistrict, which is based on entropy weight, is set up.The calculation result shows that the method is effective because the analysis result of the model, the project construction and environment characteristics achieve the basic agreement.
The Application Study of Non-Linear Dynamic Contact Model of Arch Dam with Contraction Joints
Authors: Yan Yi Zhi , Xiong Chang Xin , Li Wei Hong
Published: December 2013

Based on the theory of contact force, 3-D frictional contact non-linear dynamic contact model was put forward. It got across to search contact face, and ensure contact state. In succession, it asked for contact force under satisfying contact condition and dynamic balance condition. With the earthquake loading, the model simulates opening, closing and sliding of arch dam with contraction joints.
Two-Dimensional Shear Stress on Bonding Interface of FRP Plate Reinforced Hydraulic Concrete
Authors: Zhang Lei , Wang Jin Liang , Zhou Kang Wu , Yang Yong , Zhang Bin , Zheng Jun
Published: December 2013

The bonded interface between FRP plate and the hydraulic concrete is a key part while reinforcing the hydraulic concrete structure with FRP plate. The bond property of the interface directly decides the results of structural reinforcement. In most of the external loading conditions, this interface is under the shear stress state. Therefore, accurate measurement and analysis of interfacial shear stress distribution is the guarantee of FRP reinforced hydraulic concrete structure the premise of success. Focusing on the shear-resisting bonding strength of FRP-concrete interface, this paper improved the ASTM D905 standard shear sample and carried out numerical simulation of shear test to the bonded interface of FRP-reinforced hydraulic concrete structure by adopting the bi-dimensional finite element method, and conducted parameter analysis of the influence factors (elasticity modulus of FRP and concrete, shear modulus and thickness, etc) of shear stress on the FRP-concrete bonded interface and finally the distribution characteristics of shear stress on the bonded interface were obtained. This paper mainly discussed the influence rules of stress concentration to the distribution of shear stress on the bonded interface, which provides theoretical guidance and direction to the shear-resisting bonding strength test in the next step as well as technical support to the processing of FRP-strengthened hydraulic concrete bonded interface.
Research on Relation among Inlet/Outlet Pressure, Pressure Loss and Inlet Velocity of a Complex Resistance Muffler
Authors: Fang Jian Hua , Ji Qiang , Zhou Yi Qi , Zhu De Li
Published: December 2013

Simulation models of resistance mufflers with different typical structures were established, through the computational fluid dynamics method, under the conditions of different inlet velocities, by analyzing distribution characteristic of velocity field and pressure field for flows internal the mufflers, a kind of mathematical relation among the inlet velocity, inlet/outlet pressure, and pressure loss was discovered. Through CFD simulation computation and practical measuring tests of above three parameters for practical muffler with complex configurations, the mathematical relation of them was proved to be correct. With the conclusion, while inlet velocity changed, the variable conditions of inlet/outlet pressure and pressure loss for resistance mufflers could be estimated approximately Therefore, the test expense could be saved, and the designing efficiency for mufflers could also be further improved, so it would bring a certain economic benefit,which would be of great significance for energy saving research of mufflers.
Applied Research on Foamed Asphalt Cold-Regenerating Technique in Overhaul Engineering of Binshi Expressway
Authors: Wei Hong Yuan , Zhou Wei Feng , Sun Jian Yong
Published: December 2013

Foamed asphalt cold-regenerating technique is used to study the overhaul engineering of Binshi Expressway in 2012 (Tianjin Section) to analyze influences of different milling parameters upon the grading difference of materials of recovered asphalt pavement (RAP); and vibration compaction is used to confirm the maximum dry density and the optimum water content of regenerating mixture in the design of mix proportion to provide more reliable control parameters for site construction. Furthermore, site construction technology of cold-regeneration technique is expounded and analyzed and key control points of all links are summarized to offer technical reference for promotion and application of foamed asphalt cold-regenerating technique in Tianjin.
An Innovative Admixture to Enhance the Fresh Properties of Slag Pastes
Authors: Pan Qun , Zhao Shuang , Zheng Han Ying , Zhu Bin
Published: December 2013

This study reports a new type compound admixture YP developed for slag cement activated by water glass. The effect of the compound admixture on properties of slag pastes, including mini slump, setting time and heat of hydration was examined. It is found that the slump of slag paste was increased from 60 mm to 120 mm by using the admixture. Furthermore, the initial and final setting times of paste with the admixture were 96 min and 132 min, while it only took 18 min and 23 min to achieve initial setting and final setting for the paste without using the admixture. In addition, the results also indicate that the initial peak was delayed for nearly 7 hours and the heat flow of hydration was reduced from 5864 μw/g to 461μw/g, when the admixture was added. It can be concluded that the new admixture is capable of imparting a significant improvement of workability of alkali-activated slag cement with a suitable setting behavior.
Bond Properties of Ceramic Concrete Reinforced by Bamboo Bar
Authors: Zhou Jian , Liu Hai Ning , Ma Su , Li Jing Jing , Hou He Tao
Published: December 2013

Bond properties of ceramic concrete reinforced by bamboo bar were investigated based on pull-out tests. The influences of strength grade of ceramic concrete, material type, bond length, side length and notch spacing of bamboo bar on the bond strength between the bamboo bars and ceramic concrete were studied. The results show that the bond failure mode of ceramic concrete reinforced by bamboo bar without notch is majorly pulling-out failure, however, ceramic concrete reinforced by restructured bamboo (RB) bar with notch appears shear failure mode. The ultimate bond strength of ceramic concrete reinforced by RB bars is higher than that of ceramic concrete reinforced by laminated bamboo (LB) bar, which is close to that of ceramic concrete reinforced by plastic bars,but lower than that of ceramic concrete reinforced by steel bars under the same condition. When the notch spacing is 15 mm, the bond strength of ceramic concrete reinforced by RB bars is the highest. The conclusions can be usable for the the constitutive relationship of ceramic bamboo-reinforced concrete.
Application of Diatomite Modified Asphalt
Authors: Jiang Ling , Liu Qiu Long
Published: December 2013

The present domestic modifiers are mainly by-products of petroleum --- costing high and non-renewable, which lead to the difficulty in their wide use. This paper explores the mechanisms of purified diatomite, enhancing the stability of asphalt mixture under high temperature, low temperature or with water. At the same time, the paper makes analysis on the economy of project application, providing theoretical and economical references for spreading purified diatomite as a new modifier.
Simulation of Numerical Test of Concrete Microscopic Structure by Second-Order Manifold Method
Authors: Zhao Yan , Zhang Guo Xin , Li Hai Feng
Published: December 2013

To simulate the numerical test of concrete, the random aggregate model according to the Monte Carlo method and Fuller Graded Formula is carried out based on the assumption that the concrete is a multi-phases composite material composed of matrix. By adding the function of tracing the propagation of cracks,the Numerical Manifold Method proposed by Shi Genhua is developed which can simulate both the discontinuity of block system and the tensile or shear failure of intact block. The random aggregate model according to the Monte Carlo method and Fuller Graded Formula is carried out, and the concrete fracture process is simulated by the NMM. The strength and failure pattern are in good agreement with the experimental data, which shows that the method put forward and the program developed in this paper can effectively simulate the fracture process of concrete composed of multi-cracks.
Experimental Research on Fireproofing Measure of Beams Strengthened by Carbon Fiber Sheet Bonded with Inorganic Adhesive
Authors: Wan Fu Xiong
Published: December 2013

Because of high temperature above 1000°C on fire, and Oxidation of carbon fiber at high temperature, fireproofing measure should be make to take advantage of the inorganic adhesive for beams strengthened by carbon fiber sheet bonded with the adhesive. The problem of which fireproofing material should be choose and how to make fireproofing measure needs to resolve. Fireproofing test is make for beams strengthened by carbon fiber sheet bonded with the adhesive protected by Thick-typed Fireproof Coating for steel structure (TFCSS) and Thick-typed Fireproof Coating for tunnel (TFCT). Typical damage state of the two typical coating is compared on and after fire, Temperature field of specimen is analyzed, and fireproofing effect is compared. The test results indicate that, under the protection of fireproof coating with proper structure, TFCT and TFCSS can supply effective fireproofing protection for carbon fiber sheet, but the former is inferior to the latter because the latter is easier to drop and crack in fire
Low Temperature (~300°C) Epitaxial Growth of SiGe by Liquid-Solid Coexisting Annealing of A-GeSn/Si(100) Structure
Authors: Chikita Hironori , Matsumura Ryo , Sadoh T. , Miyao M.
Published: December 2013

To develop a new low-temperature crystallization technique, annealing characteristics of a-GeSn/Si (100) structures are investigated. It is revealed that epitaxial growth accompanying Si-Ge mixing is generated at temperatures in the liquid-solid coexisting region of the Ge-Sn system. The annealing temperature necessary for epitaxial growth is significantly decreased by increasing annealing time and/or Sn concentration. Consequently, epitaxial growth at 300°C becomes possible. These findings are expected to be useful to realize next-generation large-scale integrated circuits, where various multi-functional devices are integrated.
GaN MSM UV Sensor Using Multi-Layer Graphene Schottky Electrodes
Authors: Lee Chang Ju , Cha Hyeon Gu , Hong Seul Ki , Doh Seung Hyun , Koo Yi Sak , Cho Byung Jin , Hahm Sung Ho
Published: December 2013

We demonstrated a metal-semiconductor-metal type GaN UV sensor for the first time by using multi-layer graphene as a Schottky electrode. Multi-layer graphene shows good Schottky electrode characteristic and fabricated UV sensor shows good UV response characteristics. The maximum dark current density and photo-responsive current density were 6.42 × 10-9 A/cm2 and 5.57 × 10-5 A/cm2 at the 10 V bias, respectively. UV/visible rejection ratios were higher than 103 with each applied bias from 1 V to 15 V.
Optimal Control of the Passive and Novel Docking Mechanism
Authors: Jung Won Suk , Lee Seung Ho , Kim Soo Hyun
Published: December 2013

We propose a novel passive docking and exchanging mechanism of batteries at mobile robots. New proposed mechanism needs no actuators and sensors such as laser range finder and vision sensor to align. This mechanism, key and housing system, reduces the docking, exchanging time of batteries, and contact force by complete passive mechanism and applying optimal control of velocity by Pontryagin's minimum principle. This superior performance is demonstrated by dynamic analysis program, Recurdyn and Matlab Simulink.
An Energy Optimization Approach for Wireless Sensor Network Based on Complexity Control Algorithm
Authors: Dong Ting , Fan Chun Xiao , Wen Zhi Gang , Ji Yang
Published: December 2013

To the energy limited of nodes and imbalance energy consuming among nodes, this paper propose a algorithm of wireless sensor networks based on network building and complexity calculating, analyzed the energy consumption ration between classical cluster algorithm and new strategy. The algorithm uses a method that calculating each cluster complex and adjusting the structure of clusters if which clusters has high degree complexity. The analysis of the results shows that the algorithm improves energy efficiency and the life time of sensor network.
Analysis on the Core Theory of Mechanical Abstractive Design
Authors: Yang Xia
Published: December 2013

ive Design
Xia Yang
Luzhou Vocational and Technical College, Luzhou, Sichuan, 646005, China
zhuqinyang2011@126.com
Keywords: Machinery; Abstraction; Design; Core Theory; Analysis.
Abstract. The theory of mechanical abstractive design is the newest mechanical design concept at present. Lots of software achieve a certain degree of intelligence with the development of computer technology. And the processing efficiency is improved to a great deal through intelligent processing. Many suggestions for reference can be proposed during the processing. The study is based on the concept and characteristics of mechanical design. And the core theory of mechanical abstractive design, such as intelligence, automatic modeling and relative abstraction, was analyzed combined with the implication of abstractive design. Thus, a certain degree of reference is hopefully provided for the pragmatic design work.
Diagnosis Method Study of Transformer Windings Deformation Basing on Sweep Frequency of Short-Circuit Impedance
Authors: Gong Yan Peng , Xu Yuan , Wang Wen Huan , Bi Jian Gang , Yang Ning , Yang Yuan
Published: December 2013

Combing the advantages of frequency response method with the advantages of short-circuit impedance method, put forward the sweep frequency short-circuit impedance method. Analyse the windings deformation basing on the mutual difference of short-circuit impedance at different frequencies. The validity of this method is preliminary verified at last.
A Design Method of Position Schemes for Particle Dampers Applied to a Flywheel
Authors: Liu Bin , Wang Yan Rong , Feng Huan Huan
Published: December 2013

The design method research of position schemes for particle dampers applied to a flywheel under sinusoidal excitation has been investigated, in which discrete element method (DEM) and finite element analysis are used to study the relationship between the damping capacity of dampers filled with different metal particles and the dimensionless acceleration amplitude, and the specific parameter of radial position is introduced to discuss the influence on particle damping caused by different dampers attachment locations. A series of corresponding experimental investigation are conducted subsequently and the results indicate an auxiliary position scheme if the acceleration response of optimum location exceeds the threshold. It can be concluded that with the help of the specific parameter of radial position, the experiment results can be well explained, in addition, the design efficiency and accuracy will be raised, especially in the condition that the particles mass is strictly limited.
Reinforcement Effectiveness Analysis of Road Pile-Plank Structure in Soft Soil Area
Authors: Chen Han , Xu Si Hui , Zhang Bing Qing
Published: December 2013

Pile-plank structure is a new type of structure which is suitable for soft soil area, it has several advantages: higher strength and stiffness, better stability, lower investment, and simple to construction. It is used widely at home and abroad, but the theoretical research lagged behind the project application. This paper take an example of a new constructed road beneath the Yongtaiwen High-speed Railway in soft ground which is adopted pile-plank structure. Firstly, analyze the settlement of pile-plank structure by theoretical calculation and numerical simulation, the result of two methods basically the same. Secondly, analyze the deformation of existing railway bridge foundation by constructing the pile-plank structure. The study of this paper will provide a reference to the foundation treatment measures in soft soil area.
Rockburst Dangerous Area Dividing in Guo-Tun Deep Mine
Authors: Li Jin Kui , Wang Yi Bin , Fan Yue Bo
Published: December 2013

With the development of deep coal resources, rockburst, as a kind of typical underground dynamic disaster, always threats the production safety. Before the mining design, it is very necessary to forecast the possibility of the rockburst. This paper takes the Guo-tun coal mine for the object, considering the specific geological conditions, to predict the possible dangerous area where rockburst would happen. Through the comprehensive research and analysis, the paper would divide the 1312 working face into some probalble dangerous zones, namely strong shock hazard zones and medium dangerous impact zones, during gateway driving and stopping.
Areo-Engine Cycle Parametric Analysis and Installed Performance Calculation Based on Aircraft Flight Mission
Authors: Zhou Hong , Wang Zhan Xue , Zhang Xiao Bo
Published: December 2013

The aircraft/engine integration design numerical simulation model was established. The engine design performance specifications were obtained by calculating aircraft lift-drag characteristics, mission analysis, constraint analysis. Combining engine cycle parametric analysis with installation loss computing, the engine performance parameters can be found, which meet the aircraft flight envelope performance requirements. Taking double bypass variable cycle engine as an example to check the model, the results show that the variable cycle engine can meet aircrafts thrust and fuel consumption demands under different operating conditions, and achieve cruise thrust adjustment at the same inlet mass flow to reduce installation losses.
A Noval Information Management Method of Text Recognition Based on Ontology Semantic Domain
Authors: Yu Yang Xin , Wang Liu Yang
Published: December 2013

In today's network environment, the semantic gap between machine language and human language is the most important challenge of information management. Processing of text plays an important role in information management and knowledge management. In this paper, a proposed method shows how a text is related to its background knowledge. By background knowledge, People mean the parts of domain ontology which are not expressed in the text, but are shared by the creator and potential readers. Given the text-ontology mapping, people may discover the semantic domain of a text and how the text covers the domain knowledge. The semantic relatedness between the concepts mentioned in a text, as a whole unit,and the other concepts of the domain should be measured. This measure is based on the semantic relations defined by the ontology among its concepts. The experimental results prove that proposed method presents better overall performance and is natural way to improve retrieval results of users needed.
CFD Analysis of Shrouded Diameter in Aerosol Sampling Inlet
Authors: Wang Bao Qing , Li Yang Yang , Chen Rong Hui , Wang Ze Bei , Yao Shu
Published: December 2013

This paper presents CFD analysis of shrouded diameter in aerosol sampling inlet. Different shrouded diameter for the sampling inlet will be simulated and discussed in detail. The objective of the design is to optimizing the sampling inlet flow necessary for achieving high efficiency of aerosol sampling, while minimizing disturbance to the aircraft which carries aerosol sampling inlet. The design optimization was performed with the computational fluid dynamics (CFD) code FLUENT. The shrouded diameter to minimizing flow disturbance is 150mm. A shrouded diameter understanding derived from the CFD analysis could improve shrouded design.
EEG Autocorrelation Analysis of Neuronal Population at Criticality
Authors: Wu Zhen , Xia Xiao Fei , Wang Jun Song
Published: December 2013

The brain operates at criticality not only at resting state but also with some recognition tasks. Researches have shown that the information transmission efficiency is maximized when brain operates at criticality, however, the underlined mechanism remains some unknown. In this study, we elucidate the underlined mechanism of neuronal information transmission at criticality through a computational study. Firstly, a bifurcation analysis is conducted, by which we can obtain the Hopf bifurcation curve, responding the critical state. Secondly, we compute the autocorrelation function of the EEG (Electroencephalography) signals. The results have demonstrated that the autocorrelation function at criticality decay slowly and is much larger than other states, meaning long range dependence of the EEG signals at criticality, which reveals that the large autocorrelation function results that the information transmission efficiency is maximized at criticality.
Nonlinear Aeroelastic Panel Flutter Based on Proper Orthogonal Decomposition
Authors: Zhou Jian , Yang Zhi Chun
Published: December 2013

It is commonly accepted that 36 in vacuo natural modes (NMS) are needed for converged, limit-cycle oscillations (LCOs) of isotropic or laminated anisotropic rectangular panels in supersonic air flow. It’s computationally costly for nonlinear aeroelastic panel response using such a large number of modes, and it also causes complexity and difficultly in designing controllers for panel flutter suppression. Based on Hamilton principle, the aeroelastic finite element motion equations of the 3-D panel are established by using the von Karman large deflection theory, first-order piston theory aerodynamics, the proper orthogonal decomposition (POD) method are adopted to construct a reduced order model of the panel, then the reduced panel flutter equations are solved in time domain using a numerical integration method. Comparing with the LCOs calculated by using 36NMS, the results obtained by using the reduced order model based on POD method (POD/ROM) show a good agreement.
The Arching Process Research of SRC Beam
Authors: Liu Jun , Yuan Hai Jun , Li Hua
Published: December 2013

The purpose: The method to calculate slab-column middle connections under combined interaction of vertical shear and unbalanced moment is given to perfect the design method of slab-column structure; Method: The calculation method is proposed based on the calculation method of slab-column connection and the experimental data made by domestic and foreign scholars is used to verify. Result: The results verified by the formula are shown to be in good agreement with actual results. Conclusion: The interaction of shear and unbalanced moment are taken into account in the formula, including the transfer mode of unbalanced moment and the beneficial effects of shear reinforcement, to make the calculation more reasonable.
A 3-Dimentional Numerical Analysis of Solar-Panel-Chimney for House Ventilation
Authors: Wang Song Hao , Sheng Chih , Chou Huann Ming , Yu Shun Chih
Published: December 2013

3-dimentional CFD Numerical analyses were conducted. Major dimensional parameters were considered in the simulation and meaningful air flow rates were observed under normal conditions. to fully understand the physical mechanism of the phenomenon by air buoyancy. Based on the results of the study, the proposed solar panel chimney and its advantages are worth of further investigation. Based on this innovative concept, the rooftop solar panel could be re-arranged, grouped and boxed to form an effective solar panel chimney, to serve as passive ventilation system without much cost and fully utilize the solar power.
Thermal Stress and Modal Analysis of Engine Exhaust Manifold
Authors: Chen Chun , Ma Li , Tian Zhe Wen
Published: December 2013

The cracking problem of the engine exhaust manifold is studied in this paper. The temperature field and thermal stress are calculated. Meanwhile the modal under the thermal stress are analyzed. As a result, thermal load and thermal stress has little effect on the engine exhaust manifold. However, the result of modal analysis indicates that the structure vibration is excessive which may cause the structural cracking.
The Modeling and Locating Technology of Assembly\Disassembly Tools in Virtual Environment
Authors: Liu Yi , Li Shi Qi , Wang Jun Feng
Published: December 2013

This paper presents a feasible approach for modeling and locating of assembly\disassembly tools in the virtual scene: First, a novel point-vector model for tool is presented by means of abstracting the locating constraints of tools; Then, the mapping relationship for locating constraints between tools and parts is detailed; Finally, the best matching constraints algorithm is proposed on basis of point-vector model, which can calculate the locating constraints to the triangle model of part in real time. The proposed method has been integrated in the virtual assembly system to solve practical assembly problems.
Simulation of Aerosol Sampling Inlet for Different Outlet Angle
Authors: Wang Bao Qing , Wang Ze Bei , Li Yang Yang , Chen Rong Hui , Yao Shu
Published: December 2013

Performance of aerosol sampling inlet for different diffuser outlet angle is compared with its velocity and pressure distribution. To get information on velocity and pressure distribution for different outlet angle, Computational Fluid Dynamic (CFD) simulation can be used. At the same time, it can achieve high efficiency of aerosol sampling and minimize disturbance to the aircraft which carries the system. The final design for the sampling inlet is determined to be a design with diffuser outlet angle of 15 degree. This design was selected to keep stable for velocity and pressure, and have a less length.
Selecting L and C of the Passive Dynamic Harmonic Filter
Authors: Liang Yan Ling , Chen Jing , Yang Kun , Yuan You Xin
Published: December 2013

The variable reactor (L) and capacitor capacity (C) of the passive dynamic harmonic filter have influence on the filtering performance. The method of the L and C selecting is advanced in this paper. To select the optimal C, two conditions about the reactive power compensation and harmonic filtering need to satisfy. To analyze L, T-type equivalent circuit is constructed in this paper. With the optimized L and C of the passive dynamic harmonic filter, the harmonic filtering and the reactive power compensation are finished reliably.
The Research and Application on Light Shape Detection of Car's Headlamp
Authors: Liu Xiao Dong , Dai Shu Guang , Mu Ping An
Published: December 2013

Light shape detection of headlamps is an important project of yearly check. In the aspect of lowbeam detection, it is necessary to not only accurately calculate the boundary between brightness and shade, but also optical axis intersection point. By the principle that the second derivative indicates the concavity and convexity of functions, a polynomial fitting is used to calculate the columns grayscale profile of a lowbeam figure, and then get the cut-off point through second derivative of a polynomial. The boundary between brightness and shade is consisted of these cut-off points. The optical axis intersection point is obtained by second order difference of the boundary. While fully extracting graphic features, the method precisely locates positions of the boundary and the intersection.
Inductively Coupled Plasma Modified Silica Material Technology Research
Authors: Li Li , Jia Ying Qian , Zhao Jian Li , Gao Yan Yan
Published: December 2013

The using inductively coupled plasma etching techniques, the surface of fused silica was etched by CF4 as etching reaction gases. The results show that the fused silica surface scratches buried defects can be effectively removed with no replication effect, with the etching process proceeds, fused silica at 355nm laser light R: 1 under irradiated, the initial damage threshold of component surface is worth to an effective improved, damage resistance level of element surface more balanced, low damage threshold is worth to significantly improve.
Knowledge Tracing Modeling for Product Design Knowledge Management
Authors: Zhang Dong Min , Yin Zi Chao , Xu Yu Chun
Published: December 2013

Knowledge management in advanced manufacturing industries is a complex process. The paper analyzes knowledge application scenarios in product development processing. There are complex relationships between knowledge, product, process and designers, which four key elements are proposed for knowledge tracing modeling. Knowledge tracing modeling based four key elements for product design knowledge management is studied carefully. The research for knowledge tracing modeling will enable software function development.
A Simple and Practicable PCR-Microchip with Bubble-Free Stationary Chamber
Authors: Luo Jian , Zhang Wei Ping , Liu Wu , Cui Feng , Chen Wen Yuan , Wu Xiao Sheng , Cao Jing Tong
Published: December 2013

This paper reports on a simple and practicable biochip for polymerase chain reaction (PCR). The micro biochip (12mm×12mm) is a hybrid type which is composed of a polydimethylsiloxane (PDMS) cover with a hexagonal chamber and a glass substrate integrated with platinum (Pt) microheater and microsensor. Bubble formation has been reported as a big problem with PCR chips. In this paper we present a simple and practicable operation schedule to get a bubble free chip, in which a successful PCR process was guaranteed.
Power Flow Calculation of Distribution Network with DG Based on Advanced Forward and Backward Substitution Algorithm
Authors: Wang Ling Yun , Zheng Ye Shuang , Pan Jie , Liu Yuan
Published: December 2013

Compared with the traditional power system, there are some differences in the aspect of distribution network structure, line parameters and load parameters in the power system with distributed generations. Therefore, the conventional power flow algorithm can not be applied to this kind of networks. Considering that the distributed generations have special influence on the operation of distributed network, a novel power flow calculation method for this kind of distribution network is studied in this paper. Several equivalent circuit models of distributed generations and the corresponding approaches have been researched. The feasibility of this proposed power flow algorithms can be verified through the program designed in Matlab software.
Utilization of Improved RBF Network in Modeling of Wave Energy Absorption System
Authors: Zhang Ying , Li Meng Xin , Wang Ran Ran
Published: December 2013

Energy self-supply is one of the most important problems, and there are many undesirable energy difficulties when carrier keeps working underwater, and. A method based on inertial pendulum has been presented, but the model of wave energy absorption efficiency which is a significant parameter is strongly nonlinear and difficult to be gained. A method based on radial basis function (RBF) neural network is adopted to model in time domain. To prevent the problem that structure and parameters of neural network are hard to be tuned, improved RBF network based on particle swarm optimization (PSO) is proposed. The results obtained by presented method and by simulation software ADAMS are compared, which validate the method used to be correct and make basis on future research.
Blind Image Quality Assessment Using Latent Dirichlet Allocation Model
Authors: Luo Wang , Zhang Tian Bing
Published: December 2013

In this paper, we propose a blind image quality assessment (IQA) method under latent Dirichlet allocation (LDA) model. To assess the image quality, firstly, we learn topic-specific word distribution by training a set of pristine and distorted images without human subjective scores. Secondly, LDA model is used to estimate probability distribution of topic for the regions in the test images. Finally, we calculate the perceptual quality score of the test image by comparing the estimated probabilities of topics of the test image with that for the pristine images. Note that the quality-aware visual words are used to represent the images, which generated with respect to the natural scene statistic features. Experimental evaluation on the publicly available subjective-rated database LIVE demonstrates that our proposed method correlates reasonably well with different mean opinion scores (DMOS).
Control System Design of Ducted Fan Aerial Vehicle
Authors: Zhou Yi , Hou Zhong Xi , Shan Shang Qiu , Wang Bo
Published: December 2013

This paper carried out the control system design of a DFV based on dynamical characteristic analysis, and flight experiments were carried out to validate the performance of the control system. Firstly, the characteristics such as outstanding and control difficulty were pointed out, and then the control strategy such as three forms of translation is proposed. In the end, the controller was realized and tested by a series of experiments, and the excellent performance was demonstrated by the experimental results.
Efficient Synthesis of O-glycosyl-5′-H-Phosphonate Diesters of d4T
Authors: Liu Guo Dong , Gong Shan Shan , Liu Si , Sun Qi
Published: December 2013

A novel and one-pot route for the synthesis ofO-glycosyl-5′-H-phosphonate diesters of d4T has been developed. This analogs were synthesized by controlling tandem substitution reaction on PCl3with 2,6-lutidine as suitable base.
Strain Gage Measurements for Accurate Yield Point Determination
Authors: Janoušek Jaromír , Balda Miroslav
Published: December 2013

In this contribution the experimental program is summarized. The experiments were aimed especially at the accurate yield point determination on specimens made out of structural low carbon ÈSN 41 1523.1 steel after normalization annealing (ÈSN 411523, ASTM A623-Gr.C). These tests were carried out in the Laboratory of material diagnostics of Institute of Thermomechanics AS CR in Pilsen. Several methods for deformation and force controlled loading and various types (single with one measuring grid, rosette) of strain gages were used for achieved measurements. Likewise, the specimen made from different material batch was tested for comparative purposes. Strain gages were glued on both sides of the specimens for evaluation of coaxial alignment. Reached results are compared with those of tensile tests. All obtained data are evaluated and optimal solution is exported as output. The accurate determination of the yield point is very important for next tests of ratcheting and distortional hardening computation.
Possibility of Application of the Simulation Based Reliability Assessment Method in Modeling of Structures
Authors: Kesl Petr , Plánička František
Published: December 2013

The article deals with possibility of application of the simulation based reliability assessment SBRA Method in modeling of structures in the field of judgement of their serviceability. A steel simply supported beam of hollow circular cross sectional area was taken into account. Using rules of modeling it was modeled by the beam of the same shape, when its material was the composite material. Deflection of it was determined experimentally and using modeling rules the corresponding deflection of the steel beam was determined. Deflections of steel component and its composite model were determined using SBRA Method, realized when following random variable quantities as dimensions of bodies and corresponding geometric quantities, Young ́s modulus of elasticity E and loading force were taken into account.
The Experimental Observation of the Prestress Forces in the Structural Elements of a Tension Fabric Structure
Authors: Fajman Petr , Polak Michal , Maca Jiří , Plachy Tomáš
Published: December 2013

The periodic experimental observation of the prestress forces in some selected structural elements of the tension fabric structure is mentioned in this paper. The described experiment was focused to the tension fabric roof which covers the tram stop K Barrandovu in Prague. So far the observation was performed three times and it was every time aimed on three types of basic structural elements support cables anchored to the ground, edge cables placed in a fabric pocket and fabric membranes. The used non-destructive experimental procedures are based on the geometrical nonlinearity and the frequency method, the applied measurement system was developed by authors. The dependence of cable forces on temperature changes can be found out from the obtained results.