bluuebunny/crossref_metadata_2025 huggingface dataset:
Large Unmanned Aerial Vehicle Ground Testing System
Authors: Deng Da Wei , Li Bao An
Published: January 2015

The traditional high altitude long endurance UAV ground testing system (referred to as: testing system) not only lacks of universality and scalability, also incapable of handling faculties during flying procedure. In the paper, by using the new generation of automatic test system (New ATS), the flight simulation method, embedded technology and fault diagnosis technology, we are able to expand the testing system from ground to the sky, improving the generality of the system and UAV’s testing ability, also ensure the safety and reliability of the UAV flight at the same time.Keywords: Unmanned aerial vehicle; Automatic test system;Fault diagnosis; Embedded bus
Design of Integrative Testing System for Enclosures in Fuel System of Airplanes
Authors: Li Xiao Gang , Zhou Zhou , Cao Ke Qiang , Xia Chao , Li Na
Published: January 2015

In order to start performance testing and experimental research for enclosure of airplanes’ fuel systems, a type of integrative testing system is designed in this paper. This system can accomplish function and performance tests for enclosures in airplanes’ fuel system, and also can execute troubleshooting experiments.
The Design of an Augmented Reality Based Rigid Body Motion Experiment System
Authors: Zhang Yang Xiang , Zhu Yun , Ye Hui
Published: January 2015

The authors have designed an augmented reality based rigid body motion experiment system (ARRBMES), which could capture the physical motion information from the interaction between the users and virtual rigid bodies in real-time. The launcher and the container of the rigid bodies in this system are all positioned by tag cards, and the initial physical quantities of the rigid bodies are captured and analyzed through the motion information of the launcher tag card. Then ARRBMES will realize the real-time display of rigid body motion and collision events in a virtual-real fusion environment. ARRBMES can simulate the motion of rigid bodies in ideal state which cannot be achieved in the real world. As a result, the users can obtain realistic experience and the system can increase their physical intuition and cognitive experience. Moreover, ARRBMES can obtain physical information from the interaction in real-time between users and the system, which makes it a special Cyber-Physical System.
Research of Fuzzy RBF Approach Method Based on IMGA
Authors: Luo Yan Fen
Published: January 2015

A research of fuzzy RBF approach method based on IMGA is proposed, depending on the equivalency between RBF network and fuzzy inference, a fuzzy RBF network is designed. At the same time, the parameters and weights of the fuzzy RBF are optimized based on the immune memory genetic algorithm (IMGA), and the speed of convergence is accelerated. The optimized system is simulated by MATLAB, and compared with the original system, the approach effect of the fuzzy RBF is improved by IMGA.
Research on Neural Network PID Control Algorithm for a Quadrotor
Authors: Gao Wei Nan , Fan Jia Lu , Li Yan Nong
Published: January 2015

Quadrotor is a kind of popular unmanned aerial vehicle which obtains prime advantages in simple structure, vertically taking off and landing and hovering ability; hence it possesses wide application prospects in reconnaissance and rescue, geological exploration and video surveillance. However, attitude and position control of the quadrotor are challenging tasks because it is an under-actuated system with strong nonlinear, coupling and model uncertainty characteristics. In this paper, the dynamics model and the state space function of the micro-quadrotor are firstly established. Then, a cascade control scheme is proposed to decouple the control system and a multivariate RBF(Radial Basis Function) neural network control PID algorithm is proposed to realize robust control of the quadrotor. This algorithm is not only characterized by simple structure and easy implementation, but also capable of self-adaption and online learning. Simulation results show that the proposed control algorithm performs well in tracking and under disturbances and model uncertainties.
Design of Composite Control System for an Air-Breathing Hypersonic Vehicle with Wing-Rudder Deflection
Authors: Fan Yong Hua , Yu Yun Feng , Li Xin
Published: January 2015

The Scramjet performance of air-breathing hypersonic vehicle is highly correlated with flight height, Mach and angle of attack (AOA). The violent disturbance of the AOA can cause the engine power off. Consequently the maneuverability of hypersonic vehicle is strictly limited in the phase of cruise. A composite Control system for an air-breathing hypersonic vehicle is presented. The hypersonic vehicle has a configuration with tail control rudders and a set of deflectable wings installed nearby the center of gravity. During the phase of cruise, the precision of AOA is achieved by deflecting tail rudders, and the maneuverable acceleration command is tracked by deflecting wings. A linear quadratic (LQ) track control algorithm with integrator is used to design the composite control system. Simulation results demonstrate that the composite control system has good performance in tracking AOA and acceleration command by respective deflection in cruise.
Study on Matlab Simulation of Novel Distribution Static Synchronous Compensator
Authors: Chen Li
Published: January 2015

This paper analyses and researches the performance and principle of DSTATCOM in distribution network .Detecting means and control method of DSTATCOM are key point of this paper. The paper determines the detecting means of improved d-q transformation theory of vector control based on instantaneous reactive power and adopts a novel strategy based on the prediction table of double variable. Moreover, the simulation of DSTATCOM is presented with MATLAB. The simulating results prove the DSTATCOM put forward in the paper can realize dynamic reactive power compensation efficiently.
Modeling of Anti-Aircraft Weapon Systems Cooperative Guidance for Anti-Aircraft Missile
Authors: Lei Yu Yao , Jiang Wei Zhi , Gao Bo , Zhu Wei
Published: January 2015

The handing over of cooperative guidance is a new problem of network anti-aircraft missile weapon system. The goal is to change the un-matching status which damage zone of one missile and guidance zone of one radar. Some articles are about of this issue but the research is not in-depth. This article provided a detailed analysis of the components of anti-aircraft missile system and engagement flow. It gives some definition and concept of cooperative guidance. The AAWS (Anti-aircraft Weapon System) for AAM (Anti-aircraft Missile) cooperative guidance model is established. It contains concept model of system, coordinate transaction model, errors model and radar tracking probability model. Radom errors are simulated. The Monte-Carlo method is used to have the relationship between errors and cooperative guidance ship probability. The reliable of cooperative guidance model is proved by simulation, which established in this paper. The results of error analysis can be used for precision controlling.
The Design of Home Intelligent Power Node Based on ZigBee
Authors: Gao Yong Qing , Shanng Dan
Published: January 2015

Firstly, this paper analyzes the significance and demand of intelligent power. Then a solution of home intelligent power system based on ZigBee is proposed. Hardware components of the solution proposed in this work mainly consists of AT91SAM9G20 as the core of the home gateway controller, CC430F6137 as the core of the network node of intelligent power and construction of intelligent home network system. This paper mainly introduces a new type of home intelligent power consumption network node, which realizes the measurement of electric power parameter, monitoring, overload protection and timing control, the communication between home gateway and network node through ZigBee protocol, the intelligent household electricity. By testing and using, it can meet the aspects of everyday life needs of user in convenient life, intelligent life and energy-saving, etc. It brings great commercial return and technical value to the development and application of intelligent home in future, as well as far-reaching impact to improving the quality of intelligent home services.
Development and Research of an Integrated Platform System for Management and Control
Authors: Zhao Wei Mei , Zhu Chao Yang , Yu Zhen
Published: January 2015

This paper describes the current status of power communication systems, problems and solutions, proposed to build an integrated platform system for communications management and control.The integrated platform system is divided into four parts: Comprehensive Monitoring Subsystem, Resource Management Subsystem, Operation and Maintenance Management Subsystem, Security Management and Control Subsystem, which can monitor the resource, operation and maintenance, and security controls etc.This system can implement communication professional management, process management, user management, daily operation, maintenance work management standardization, process and automation; promote systematic and integrated for communication network, improve service management level and efficiency of operation and maintenance; and provide better support and protection for developing the grid and the smart grid.
Effect of Consolidation and Sintering Parameters on the Mechanical Responses of Nanocrystalline Al-Fe Alloy Processed by Mechanical Alloying
Authors: Baig Muneer , Ammar Hany Rizk , Seikh Asiful Hossain , Alam Mohammad Asif , Mohammed Jabair Ali
Published: January 2015

In this investigation, bulk ultra-fine grained and nanocrystalline Al-2 wt.% Fe alloy was produced by mechanical alloying (MA). The powder was mechanically milled in an attritor for 3 hours and yielded an average crystal size of ~63 nm. The consolidation and sintering was performed using a high frequency induction sintering (HFIS) machine at a constant pressure of 50 MPa. The prepared bulk samples were subjected to uniaxial compressive loading over wide range of strain rates for large deformation. To evaluate the effect of sintering conditions and testing temperature on the strain rate sensitivity, strain rate jump experiments were performed at high temperature. The strain rate sensitivity of the processed alloy increased with an increase in temperature. The density of the bulk samples were found to be between 95 to 97%. The average Vickers micro hardness was found to be 132 Hv0.1.
Two 81-96 GHz Active Frequency Triplers MMIC
Authors: He Hui , Zhang Jian , Zhang Run Xi , Shi Chun Qi , Liu Tang
Published: January 2015

Two 81-96 GHz frequency triplers, one balanced and one single device, are implemented using a 0.10 μm GaAs pHEMT process. The EM simulation results show that the triplers perform a best conversion gain of -6.8 and -4.7 dB for the balanced and the single device, respectively. The conversion gain of the balanced tripler operating from 81 to 96 GHz is above -9.6 dB at 3dBm input power. The conversion gain of the single device operating from 81 to 96 GHz is above -8 dB at -0.5dBm input power. The fundamental and second harmonic suppression are as high as 30 dB over the whole operating frequency (81-96 GHz) for both circuits.
Research on Functional Dependency for XML Schema
Authors: Li Ran , Guo Xian Jiu
Published: January 2015

In this paper, gives the concept of functional dependency for XML based on Tree Tuples, furthermore, infers a inference rules set of functional dependency by using Armstrong axiom-system of database system.
Medical Image Condensation Based on Wavelet Transform
Authors: Cao Xu , Zhang Hua Xun
Published: January 2015

This paper based on the peculiarity of wavelet transform that its transform only in vacuum region and frequency region, decompose image use the theory of wavelet, obtain a series sub-image of different resolution ratio. The value of higeresolution ratio sub-image is all verge on 0, the phenomenon is more obviously in high frequency, so that, the mainly proportion is low frequency to a image. Use wavelet decomposition get rid of the high frequency, only reservation low frequency, to realize the aim of condensation image. Through the simulation of contradistinctive image of cerebra framework remotion between three-dimensional ultrasonic imaging in course of OPS and MIR preceding OPS validated the feasibility by Matlab.
A Multi-Focus Image Fusion Based on Wavelet and Block-Dividing
Authors: Ma Hui Zhu , Nie Qi Gui
Published: January 2015

The traditional fusion rules of multi-focus image are largely centered on the fusion rule of high frequency coefficients, and those rules are all based on single pixel. Which leads to serious ringing effect, and reduces the visual effect of fusion image. The energy of an image is concentrated in the low frequency part after Wavelet Transform, and multi-focus image has the characteristic that the vast majority of adjacent pixels are either the clear area, or the blur area. Based on the above analysis, a new fusion method to multi-focus image is presented in this paper. The simulation results show that the proposed method is more feasible than common methods in processing multi-focus image.
Numerical Simulation of Flow Field in the Tundish with Two Outlets
Authors: Ma Tian Fei , Li Hong Xia , Wang Xin Fu , Liu Guo Qi
Published: January 2015

According to the operating parameters of continuous casting tundish in a steel mill, the flow patterns of liquid steel in tundish were studied by the method of numerical simulation. Changing the flow orifice area of slag wall, to simulate and calculate the influence of slag wall on the flow field in tundish. Through calculating the steel flow vector, to analyze the uniformity of steel flow in tundish, by calculating the inclusions distribution to analyze the effect of blocking slag wall holding inclusions. The simulation results show that: the slag wall can obviously deduce the short circuit flow of steel liquid in tundish bottom. With the flow orifice area is reduced, and the turbulence brisk between two slag walls, and liquid surface is easy to roll; the ability of slag wall holding inclusions enhances, but too small flow orifice area will prompt inclusions passing the slag wall.
The Element-Free Galerkin Method for the Unsteady Magnetohydrodynamic Flow in a Duct
Authors: Cai Xing Hui , Qiang Hong Fu , Lu Jiang Ren , Wang Guo Liang
Published: January 2015

In this paper, a meshless global element-free Galerkin method is given to obtain the numerical solutions of the coupled equations in the velocity and magnetic field for the unsteady magnetohydrodynamic flow through a straight duct with arbitrary electrical conductivity, that is, from perfectly conducting to insulated duct walls. The moving least-square approximation scheme is employed to construct shape functions. A time stepping method is employed to deal with the time derivatives. Non-uniform background grids and nodes are applied for numerical simulations. Computations are performed for different Hartmann numbers and wall conductivities at different time.
Influence of Geometrical Features of Meso-Defects on Damage Evolution of Metal Structure
Authors: Zhao Chao Fan , Li Zhao Xia
Published: January 2015

To study the failure process of metal structure with meso-defects, RVE (representative volume element) with various initial meso-defects were analyzed by using ABAQUS software, the parameter f (void volume fraction) of GTN damage model was regarded as the criterion of structural damage. The result shows that f increased more obvious with volume of defects for spherical defects with the same shape but different size. When the radius of defects is less than 0.15mm, the influence of defects’ volume on increases of f is clear enough. When the radius is greater than 0.15mm, the effects is diminishing. For ellipsoidal defects with the same volume but different aspect ratio, when the long axis perpendicular to the direction of load, the increased trend of f according to plastic deformation more obvious along with aspect ratio of defects. Apparently, as aspect ratio approaches infinity, f would have the fastest growth. Consequently, the bigger defect volume and aspect ratio, the more conducive for damage evolution of the metal structure.
Low-Speed Preconditioning for AUSM+-Up Scheme
Authors: Peng Wei , Chen Guo Ping , Li Lang
Published: January 2015

Based on Navier-stokes equations, Weiss-Smith matrix preconditioning method is implemented within pseudo time derivative term. AUSM+-up family schemes and LU-SGS implicit iterative method were used to solve low speed flows and were compared with literature data and theoretical value. Through comparing calculation with the literature data and theoretical value, The results showed the preconditioning algorithm can be applied efficiently to the low speeds flow field, All these works built foundations for further application of chemical flows.
Parametric Selection of Dynamic Vibration Absorbers for Resonant Suppression of Structure-Absorber Systems
Authors: Liu Lin , Fang Huang Cheng
Published: January 2015

The selection of absorber parameters is of utmost significance for structural vibration control by dynamic vibration absorbers. Based on the classical frequency tuning approach by Den Hartog, optimal damping ratio is derived in close form by equating the dynamic magnification factors of the structural motion at three particular frequencies of interest. In addition, by maximizing the two identical modal damping ratios through root locus in the first quadrant of complex plane, the corresponding absorber damping ratio is derived and proposed as the upper bound of the absorber damping ratio for practical applications.
Shear Failure Mechanism of Infilling Rock Joints and its PFC Simulation
Authors: Xu Lei , Ren Qing Wen
Published: January 2015

Infilling rock joints widely exist in natural rock masses, and the shear failure of infilling rock joints plays an important role in the instability of rock masses. In order to study the shear failure mechanism of infilling rock joints, Particle Flow Code is used to simulate the direct shear test of infilling rock joints. The PFC models with different infilling thickness are established firstly, and then the procedures of PFC simulation are described. In the end, the shear failure process of infilling rock joints with different infilling thickness is simulated. Based on the PFC simulation results, it can be concluded that the shear failure mode changes with increasing infilling thickness, and the shearing of the infilling rock joint rarely gives birth to microcracks in rock due to the existence of the infilling material.
Shear Properties and Strength of Weak Intercalated Layers in Dam Foundation of Datengxia Power Station
Authors: Tan Chun , Ma Zhi Fa , Liu Zhong Fu , Ma Dong He , Li Yan Ping , Sui Wei , Xu Shuang
Published: January 2015

For gravity dam with weak intercalated layer in foundation,the shear strength of the weak intercalated layers is the main factor in the control of the dam stability. It is the key point of geological and experimental work to ensure the shear strength to satisfy safety and economy of dam. The material composition,mineralogical composition and structure,genetic type and characteristics of shear stress and strain of weak intercalated layer in dam foundation of Datengxiapower station are analyzed,the valuation rule of the shear strength of weak intercalated layer with plasticfailure mode is discussed,and finally the recommended geological value of shear strength of weak intercalated layer in this project is proposed.
Stability of Gas Drainage Borehole Analysis on Rock Mechanics Parameters with Roadway of Complex Stress
Authors: Zhang Tian Jun , Zhang Lei , Pan Hong Yu , Zhang Chao
Published: January 2015

The pattern of stress redistribution in the effect of circular roadway is analyzed and numerical simulation on stability of gas drainage borehole which is in the area of the stress redistribution was done with FLAC3D. The model of that circular roadway and gas drainage borehole are perpendicularly crossed is established and compute with the Coulomb Mohr criterion. It can be found that the stress of gas drainage borehole decreases with decreasing of internal friction angle and the cohesion value. The stress of gas drainage borehole steep rises where the distances of away from roadway is two times of the diameter and the stress of horizontal direction are larger than the stress of vertical direction.
Applications of Seismic Isolation Retrofitting in Historic Buildings
Authors: Yin Ru , Chen Yong Zhan , Chen Zhong Fan
Published: January 2015

Compared with conventional methods of seismic retrofitting, seismic isolation is not only more economical, but also can preserve the original appearance of historic buildings. Therefore, this method is more suitable for retrofitting of historic buildings. This paper briefly introduces the basic principles of seismic isolation retrofitting and some application examples at home and abroad. Besides, this paper summarizes some issues that should be paid attention to in seismic isolation retrofitting.
Stability Analysis of Narrow and Long Excavation in Soft Soil Area
Authors: Zhou Shi Chong , Gao Li Li , Wu Dong Hui , Liu Yang , Wang Dong Yue , Li Shi Qiang
Published: January 2015

At the present stage of excavation design,the embedded depth of braced structure should meet the requirement of circular sliding stability when the bottom is soft soil. By increasing the embedded depth of support structure, the requirements of stability could be meet. In the normal design, the support structure must penetrate the soft soil layer when the bottom exist soft soil. While when the excavation is narrow and long, because of the obviously spatial effect, there is no need to determine the embedded depth based on the general circular sliding stability. In this paper, based on one the project example, calculate and analyze the similar stability using strength reduction method through the finite element software Plaxis and Midas.
Ceramsite Foam Concrete Insulation Block
Authors: Xu Xiao Lei , Zhang De Cheng , Liu Fu Tian
Published: January 2015

This paper studied the lightweight ceramsite, thickener and waterproofing agent dosage on the influence of the foam concrete water absorption and strength, and further researched into the amount of foaming agent on the influence of the density and strength. The results show that adding 20% ceramic, 0.03% thickening agent and 1% waterproof agent prepared the best performance of foam concrete.
Prediction of Steel Bar Corrosion of RC Members Deteriorated by Pre-Existed Chloride and Concrete Carbonation
Authors: Xue Xin , Xiong Wen , Wang Hui Chao , Shen Cong Zhou
Published: January 2015

By simulating solo or combined deterioration action of pre-existed chloride and concrete carbonation, this paper carried out an experimental investigation on the corrosion state of steel bars embedded in concrete with different concrete cover thicknesses and containing different chloride amounts. Comparisons of corrosion current density, corrosion area ratio and corrosion weigh loss of embedded steel bars were made and the effect of combined action was systematically studied. Test results indicated that under the combined action, the corrosion current density measured soon after concrete carbonation test increased with the total chloride amount containing in cover concrete, and the specimens under the combined action exhibited larger value of corrosion current density, corrosion area ratio and mass weight loss than that of the specimens subjected to the solo action. It was further indicated that the mass loss ratio of embedded steel bars at the point of corrosion crack initiation was 1.29% for the specimens with 5mm concrete cover, and the corresponding value of the specimens with 10mm concrete cover was 1.33%.
Stability of Floating Body Using Moderate Lightweight Concrete Mixed with Crumb Rubber and Polymer
Authors: Raongjant Werasak , Jing Meng
Published: January 2015

The purposes of this research is to study the stability of floating body using moderate lightweight concrete of which the gross weight was modified by crumb rubber and polymer. The moderate lightweight concrete was prepared by replacing 10%, 20% or 30% of sand in weight with crumb rubber of size No.6 or No.26 and mixing with the fluid polymer latex in 7.5% or 15% of the weight of cement. The test results shown that the concrete 626CR10-7.5, replaced sand with 5% No.6 rubber and 5% No. 26 rubber and mixed with 7.5% polymer, had better permeable resistant. Six pieces of models in the shape of open box were produced using the common concrete and concrete 626CR10-7.5. The stability of floating concrete body was tested and the metacentric height and the period of roll were calculated based on the test data. It is concluded that the moderate lightweight concrete behaved better stability and was appropriate material for floating concrete structures.
The Inversion of Concrete Thermal Conductivity Using Least Squares Finite Element Method
Authors: Huo Shao Jun , Tong Fu Guo , Liu Gang
Published: January 2015

This paper adopted the least squares of finite element method to calculate the thermal conductivity of concrete in annular region according to the internal temperature of concrete in one-dimensional steady-state heat conduction. The concrete in annular region was divided into several kinds of materials along the radius when computing thermal conductivity. The results that the ratios of the thermal conductivity of different radius are no more than one order of magnitude prove that the least squares finite element method has a high precision.
Neimark-Sacker Bifurcation of Rolling Bearing System with Fault in Outer Ring
Authors: Wang Qiang , Liu Yong Bao , Xu Hui Dong , He Xing
Published: January 2015

Piecewise non-smooth model of three-degree-of-freedom rolling bearing system with fault in outer Ring is established by the method of the nonlinear theory. The Neimark-Sacker bifurcation of bearing system is first studied in this paper. The switching matrixes of system are obtained at the switching boundaries, and theNeimark-Sacker bifurcation of non-smooth bearing system is analyzed by combining the switching matrixes with the Floquet theory for smooth systems. The numerical method is used to further reveal the Neimark-Sacker bifurcation of bearing system through establishing the Poincare mapping on the collision plane. When the rotating frequency is increased to reach the critical bifurcation point, a pair of complex conjugate Floquet multipliers is on the unit circle and others into a unit circle , and the Neimark-Sacker bifurcation appears.The study of bifurcation of the fault bearing system provides reliable basis for the design and fault diagnosis and provides theoretical guidance and technical support for the actual design in the safe and stable operation of large high-speed rotating machinery.
Temperature Field Measuring and Simulation of CMSX-6 Superalloy during Directional Solidification
Authors: Jia Zhi Hong , Xu Liang , Tao Ran , Ma Ming Zhe , Xie Dao Cun , Zhao Yu Tao
Published: January 2015

A three-dimensional model of CMSX-6 superalloy coupons was built in the paper, temperature field was calculated with software ProCAST. The temperature values of coupons were indicated from the measurement at the rate of 3 mm min-1 withdrawal velocity during directional solidification process, and the temperature gradient of different location of the coupons were calculated. It turned out that: the simulated results and the measured results are in good agreement; due to the different medial and lateral affected by radiation, isotherms showed sloped distributions in the process of the withdrawal; the temperature gradient of the measured positions in the coupons which are 10 mm, 50 mm, 100 mm, 150 mm far from the copper chill, are 8.0 Kmm-1, 3.0 Kmm-1, 2.5 Kmm-1, 1.8 Kmm-1 respectively.
Exploration on the Relationships Based on the Offset Overprint Trapping between the Optical Density and Color Ink Film Thickness
Authors: Yang Yong Gang , An Wen
Published: January 2015

The research finds out some existing certain regularity, and further revises the formulaD=D∞(1-e-ml). The formula means the relationship between ink thickness and ink in density. By using the formal of one-color ink thickness and ink density, the second density that correspond the first major density is transferred to the equal thickness. Then they are added together. According to the formula the real ink density is calculate. Then use the above formula to work out ink thickness. In this way, overprint densities come out, and make contrast with the actual measure data, so the new model formula is built up. The result shows that the average error between the overprint density calculated by ink thickness and the actual measure data is about 0.07. However, the average error between the calculated density using the simple adding method and the actual measure data is about 0.5, so this method is practical and more accurate.
Photoelectro Degradation of Rhodamine B on Co-Doped TiO2 Films under Visible Light
Authors: Zhu Feng , Cao Jiang Lin , Duan Ning
Published: January 2015

In a single photoreactor, the degradation of rhodamine B (RhB) was studied on TiO2 and Co-doped TiO2 (Co-TiO2) films under visible light. The results show that the degradation rate of RhB by photocatalytic (PC) and photosensitization (PS) on Co-TiO2 films is quicker than that by PS degradation on TiO2 film. However, a fast N-de-ethylation leads to the increase in degradation rate unsatisfactory. When a bias potential was applied onto Co-TiO2 films, the degradation rate of RhB greatly increased. This can be attributed to the generation of more hydroxyl radicals on Co-TiO2 anodes and cathode. These OH⋅ radicals attack the chromophoric structure of RhB. In addition, with the bias potential application, the optimal Co2+ dopant concentration increases from 0.02 % to 0.4%.
Study on Numerical Model of the Collision Effect between River Ice and Flexible High Pier
Authors: Peng Tao , Han Yan , Zhai Dong
Published: January 2015

In this paper, the finite element model of river ice collision on the pier was established by adopting explicit dynamic analysis software package, LS-DYNA. And the finite element analysis model establishment methods for calculating the collision interaction forces between the river ice and flexible high pier were studied. The simplified constitutive model of river ice was proposed. Factors influencing the simulation of flow ice collision on piers were discussed including the meshing size of ice sheet, and the meshing size of pier in contact area, the contact type with related algorithms. The study show that Solid164 can be used to simulate the ice sheet and the contact area of pier; in terms of the model of collision effect between river ice and flexible high pier; automaticsurface-to-surface contact type, ASTS, is the most appropriate; the river ice can be simplified as linear elastic material; rigid body can be used to connect the solid element and beam element. The conclusions drawn from this paper provide a new method for calculating the collision force between ice sheet and flexible high pier, which has a significant meaning in calculating the river ice collision forces theory.
Room-Temperature Fabrication of Flexible Thin-Film Lithium Batteries Based on Solid Electrolytes and Polyimide Substrates
Authors: Chen Mu , Yan Yue , Liu Wei Ming , Zhou Chen , Guo Zhi Qiang , Zhang Xiao Feng , Wang Yong Lin , Li Lei , Zhang Guan Li
Published: January 2015

Flexible thin-film lithium batteries can power flexible electronic devices and wearable devices. Here we report room-temperature fabrication of flexible batteries with Li/LiPON/LiFe (WO4)2 active layers on polyimide substrates by sequential magnetron sputtering and thermal evaporation. Inorganic solid electrolyte LiPON films were well prepared to achieve lithium ion conductivity of 1.794×10-6 S/cm in the composition of Li2.7P(O0.99N0.11)4. Due to two redox centers of Fe3+ and W6+ in amorphous LiFe (WO4)2 cathode films, large initial specific capacities of 115.5 μAh/(cm2-μm) and 65.4 μAh/(cm2-μm) are achieved in the flat and bending batteries respectively. After 200 cycles, the discharge capacity remains 27.6 μAh/(cm2-μm). Low-temperature fabrication process of flexible batteries insures the use of lightweight and thin polymer substrates instead of high temperature resistant metal and ceramic substrates.
Preparation and Properties of Porous Glass-Ceramics with Fly Ash
Authors: Chen Hao , Feng Wen Jiang , Yang Mei
Published: January 2015

The porous glass-ceramics, i.e. SiO2-Al2O3-CaO-ZnO-R2O, was prepared with fly ash by means of the typical powder sintering method. The properties, microstructure, and morphologies of the prepared porous glass-ceramics was analyzed by employing differential thermo-gravimetric analysis/differential thermal analysis (TGA/SDTA), x-ray diffraction (XRD), scanning electron microscopy (SEM) methods, etc.. The experimental results illustrate that, the primary crystalline phase of the system is the parawollastonite (mon ̊Clinic system), with the short columnar-or bar-like grains. Furthermore, the pores of the prepared ceramics are basically composed of macro-pores, with a diameter size of 10μm~1mm. Besides, the well-distributed macro-pores are mutual independence, without formation of macro-pore mesh. All the analysis indicates that, the prepared porous glass-ceramics, i.e. SiO2-Al2O3-CaO-ZnO-R2O, can be candidate as one of the heat insulating materials.
The Effect of Tip Materials on the Nanotribology with Atomic Force Microscope Technique
Authors: Dong Mei , Li Mei , Zhang Yan
Published: January 2015

The effect of tip materials on the friction properties of silicon substrate was investigated by using atomic force microcopy (AFM). The roughness of the silicon wafer surface was characterized with silicon tip at tapping mode, and then the relationship between the friction force and normal force was obtained by silicon tip and silicon nitride tip at contact mode. The experimental results show that when the load exceeds a critical value, the friction coefficient with silicon tip increases from 0.17 to 0.37, which is due to the wear of the silicon tip; the friction coefficient with a hard silicon nitride tip increases from 0.25 to 0.5, which can only be attributed to the plastic deformation of silicon substrate. And the roughness of the silicon substrate can lead to an incomplete contact, which can influence the real contact area between the silicon nitride tip and silicon substrate.
Study on the Relationships between Plastic Viscosity and Tack Value of Offset Printing Ink
Authors: Yang Yong Gang
Published: January 2015

In order to find out the variation law of ink stickiness during the printing, the ink tack value under 9 different linear velocities of ink distributing roller was tested, and the relation equations between tack value and the roller linear velocity were built up. At the same time, the plastic viscosities of 8 offset inks and their tack values under 9 separation velocities were also tested. The study results showed that the higher the linear speed was, the larger the tack value was, and it would stay in a relatively high tack value (regarded as infinite tack value). Also, the printing ink having high viscosity may possess low tack value.
Superhydrophobic Surface Preparation Technology and its Progress
Authors: Liu Wei , Xu Qun Jie , Han Jie
Published: January 2015

With the wide application of various functional materials, corrosion problems have not only caused huge losses in economy but also made a waste of energy and resources. Superhydrophobic surface treatment technology, which is a new anticorrosion technology, can inhibit the corrosion of various functional materials effectively. This paper reviews the advances in research on superhydrophobic surface, introduces the basic theory of superhydrophobic surface, summarizes the preparation method of super hydrophobic surface and the existing problems, and introduces the latest research progress of functional superhydrophobic materials.
The Coating Property Study of (Meth)Acrylate Copolymer with Gradient Wettability Surfaces
Authors: Zhang Yong , Cheng Jiang
Published: January 2015

The coating property of (meth) acrylate copolymer with gradient wettability surfaces was studied. The random (meth) acrylate copolymers can be obtained according to the free radical polymerization method and their coating property was analyzed according to performance testing. The gradient wettability surface was prepared by using the sodium hydroxide solution. The effects of the kinds of crosslinking monomer, mass ration of HEMA, additional method of HEMA, amount of curing agent and curing temperature on the coating property of (meth) acrylate copolymer were discussed. It was found that the mass ration of HEMA was 15 % and the additional method of HEMA was added previously when the molar ration of MMA/BA was 6/4. The amount of curing agent was 1.86 g and the curing temperature was 160 °C when the P (MMA-BA-HEMA) solutions were 10 g.
Shear Wall Stability Computation and Analysis of Reinforced Concrete Frame-Shear Wall Structures
Authors: Hou Jun Feng , Su San Qing , Li Bin Bin , Zou Ying Xian
Published: January 2015

The stability of the concrete shear wall is composed of the overall stability and wall limb local stability, the overall stability and local stability calculation formula can be used the same form of expression. Based on the theory of stability calculation of elastic thin plate, the trilateral bearing and quadrilateral bearing wall limb length factor is derived. And then, it pointes out the disadvantages of the current code and design software, and gives the corresponding solution.
The Key Issues and Considerations of Buckling Restrained Braces in Seismic Applications
Authors: Wen Wen Lu , Zhou Li Chao , Tao Zhong
Published: January 2015

The damping mechanism of buckling restrained braces is clear, the effect is significant, safe, reliable and economical, it can be used in structures that have different seismic requirements and seismic intensity. It can be used for single-storey buildings, high-rise buildings. It has not only been applied to new buildings, but also have been used for seismic reinforcement and shock repair of the built construction, so it has broad application prospects.
Optimization Research on Geometric Parameters of Scallop-Shaped Lattice Shells
Authors: Li Na , Chang Ren An , Zong Wei , Yu Qi Hang
Published: January 2015

Free-form and bionic spatial shells are popular in the area of spatial structures. Scallop-shaped surface is the product of evolution and a kind of spatial shells that can satisfy the mechanical requirements. Based on the scallop-shaped lattice shells, this paper focused on the optimization of geometric parameters. The principle of minimum strain energy was applied to conclude the influence law of the geometric parameters on mechanical properties. Finally the optimal values of geometric parameters were obtained. The results show that the optimization of geometric parameters presents the integrated significance to improve scallop-shaped lattice shells.
Research on Dynamic Characteristics of Bladed Disk System by Fixed Interface Prestressed-Free Interface CMS Super-Element Method
Authors: Zhang Liang , Li Xin , Liu Tie Jian
Published: January 2015

For the prestressed substructure analysis, the existing CMS super-element methods are only suitable for the model that relatively simple structure, less meshing and small number of nodes. Since the complex structure and more mesh division of an arbitrary large model such as a mistuned bladed disk system, it is more time-consuming for the dynamic characteristics analysis. Because of above shortcoming, an approximate analysis method is presented, it is called fixed interface prestressed-free interface CMS super-element method. The accuracy of this method is predicted by the example. The results showed that the dimensionless dynamic frequency maximum relative error of system is 3.072215%, which can be to meet the requirement of accuracy.
Using Multi-Agent System to Control the Radiation Noise in an Enclosure
Authors: Chen Da Lin , Chen Nan
Published: January 2015

Multi-Agent system (MAS) is used to control the radiation noise in a rectangular enclosure, which is surrounded by two flexible plates and four rigid plates. The noise is generateded by the vibration of the exciting flexible plane. A MAS is established to coordinate the active noise control method, and these agents are controlled by a coordination object which includes compete and cooperative rules. These agents are competitiveness, so the MAS can provide fault-tolerant capabilities for the control mechanism. Meanwhile, these agents are independent and modular, and can be used in “Plug-and-Play” control field. The formula is derivate to calculate the sound pressure in the enclosure when there some point forces applied on the flexible plates, and the simulation shows using MAS to control the noise in the cavity is effective.
Vibration Characteristics of Non-Metal Flight Control Structures in Extremely High Temperature Environments
Authors: Wu Da Fang , Pu Ying , Shang Lan , Wang Yue Wu , Yang Jia Ling
Published: January 2015

A self-developed extension configuration of high-temperature ceramic pole was used to transfer the vibration signals to non-high temperature zone, and the vibration signals of composite wing structure under high-temperature environment were identified by the ordinary acceleration sensors. The experimental measurement on the key vibration characteristic parameters of composite wing structure under high temperature thermal vibration environment up to 1100°C (e.g., the natural frequency, mode shape) was realized. The experimental results can provide an important basis for the dynamic performance analysis and safety design of composite wing structure under high-temperature thermal vibration conditions.
Numerical Study on the Evolution of Force Chain inside Railway Ballast under Tamping Operation
Authors: Zhou Tao Yong , Hu Bin , Xu Ping , Yan Bo
Published: January 2015

The tamping maintenance of railway ballast is employed to restore the geometry of railway track distorted by train traffics. In this paper, based on the analysis of tamping principle, the three dimensional analysis model of railway ballast is created using the discrete element method, numerical simulations are performed to study the micro mechanical behavior of railway ballast under tamping operation. This paper presents the evolution of force chains inside railway ballast under tamping operation. The obtained results are showed that the contact force inside railway ballast is enhanced by tamping, so as to improve the carrying capacity and stability of railway track.
Overall Solution of Comprehensive Evaluation for Missile Storage Life
Authors: Gao Jun , Huang Dao Ping , Li Xiao Bing
Published: January 2015

From the urgent needs of storage life evaluation in missile storage management, combining the characteristics of long-term use of missile and characteristics of different level products of the system, a complete set of overall solution of the life prediction and life extension of missile was proposed. First, through the use of missiles long-term use historical information, the reliability function model of the missile storage was established, and the life conclusions of missiles were estimated. Secondly, by conducting accelerated life or accelerated degradation test of missile, the life of missile was estimated. And by conducting environmental test and simulation test, the environmental adaptability indexes were verified. Thirdly, by carrying out the life feature detection analysis of the circuit board, the microscopic defects in the circuit board were detected, and the guidance for life extension work was raised. Finally, by conducting accelerated degradation of the key components and materials, the life conclusions of them were estimated. Combining the storage life information of missiles, board-level circuits, components and materials, a complete set of overall solution of the life prediction and life extension of missile was proposed.
Finite Element Analysis of Larch Glum Columns
Authors: Wang Qian , Feng Xin , Liu Ze Ya
Published: January 2015

This paper studies on the compression properties of larch glum columns by building a finite element modeling. A three-dimension solid element SOLID 95 (Fig.1) of ANSYS is elected to simulate the test specimens firstly. The numerical simulation result (stress-strain curve) agrees with the experimental result. The highest stress value on the cross section is 12% of that along the grain, which is approximate with the result (10%) carried out from test. For the strain profile under the ultimate load, the strain distributes homogenous along the grain while the values of strain are almost the same at the corn of cross section. The modeling built in this paper can verify the compression test of the larch glum columns. It is reasonable to simplify the glum columns as transverse isotropy material.
Grouting Technique Applications during Housing Construction
Authors: Zhang Qin , Li Lin , Mo You
Published: January 2015

The housing construction grouting technique is to select a specific pressure feed approach to pour the slurry in gel into the loose soil or the rock cracks with water. The slurry, through condensation and the particles consolidation in this category, will be filled into the rock cracks in the section so as to improve the inherent nature of the soil and the mechanical properties of the other substances. During the construction period, the slurry can be fed into the injected holes within this segment through the unique role of the pressure. The small opening surrounding the grouting holes, the preset requirements will be met. Therefore, it is necessary to clarify the specific applications of grouting techniques.
Catalogers and Semantic Environment of RDA
Authors: Sun Yu Peng
Published: January 2015

This paper briefly describes the most important resources in the area of information resources organization and retrieval (RDA) summary of advantages and application of, and from the perspective of discusses the difficulty of understanding the RDA. The author suggests that catalogers should take countermeasures under the new circumstances.
Paper: An Emerging Green Furniture Material
Authors: Wang Ming Gang , Tian Yue
Published: January 2015

Green and environmental protection has become a theme of contemporary furniture design. As a unique furniture material, paper has characteristics like wide source, easy processing, non-toxic and pollution-free. It has been used in the development and design of furniture. Paper furniture has broad application prospects.
Preparation and Study of Polyvinyl Alcohol Fiber
Authors: Chang Ai Rong
Published: January 2015

The preparation of polyvinyl alcohol fibers mainly consists of three steps: 1. The polymerization of vinyl acetate. Need the preparation of vinyl acetate and polymerization of vinyl acetate. The polymerization of vinyl acetate uses acetylene method and ethylene method.2. Preparation of PVA. Mainly to let the polyvinyl acetate taking alcoholysis reaction to the effect of methanol or sodium hydroxide. 3. Preparation of polyvinyl alcohol fiber. Complete dope preparation through washing and dehydration, dissolving, mixing, filtering and deaeration, and uses the dry, wet two methods to form the spinning. Finally, through the follow-up processing, to accomplish the preparation of polyvinyl alcohol fiber. Water soluble and high concentration polyvinyl alcohol fiber ‘s performances are fine and is application widely.