bluuebunny/crossref_metadata_2025 huggingface dataset:
A Novel 2-D Spectrum Model for Bistatic SAR Based on Hyperbolic Approximation
Authors: Wu Zong Liang , Zhang Xiao Ling , Xiang Gao
Published: January 2015

Due to the fact that the range history of bistatic synthetic aperture radar (SAR) doesn’t follow the hyperbolic function, the accurate analytical spectrum of bistatic SAR cannot be obtained directly by the principle of stationary phase (POSP). In this paper, we approximate the range history of bistatic SAR by the hyperbolic function, and propose a novel two-dimensional (2-D) analytical spectrum model for bistatic SAR. The huge advantage of this novel 2-D analytical spectrum is that the equivalent radial velocity of any scatter point in the observed scene, with respect to the radar platform, is not only the same but also invariant with the equivalent range. Further, based on this novel spectrum model, the wavenumber domain algorithm (WDA) could be applied to image the whole observed scene. Finally, the simulation and realistic data imaging results also validate that this novel spectrum model is correct and effective.
Acceleration Signal Processing Based on EMD Adaptive Filtering and Frequency Domain Integration
Authors: Shi Ping An , Wu Lei
Published: January 2015

In order to improve the accuracy of the phase and amplitude of acceleration integration results, a new method to transform acceleration signal into displacement was presented which combines Empirical Modal Decomposition (EMD) adaptive filtering with FFT based frequency domain integration. The acceleration signal is decomposed by EMD into n IMF, and by certain rules, the number of IMF pertaining high frequency (h) is determined, and the h IMF are adaptively filtered to cancel noises. After that, the FFT transform is applied to the n processed IMF, frequency domain integration is done, and finally the displacements time series is obtained by IFFT. Simulation shows that this acceleration signal processing method is better than the pure frequency domain integration transformation.
An Improved Frequency-Shift Compression Method Based on Auto Energy Gain Compensation for Digital Hearing Aids
Authors: Zhao Zhi Liang , Guo Zhao Yang , Luo Xiang Xiang , Xue Feng Jie , Wang Xin An
Published: January 2015

Sensorineural hearing impaired individuals have narrow hearing range, especially in high frequency. Due to acoustic diffusion masking, just amplifying speech can’t meet patients’ demands. Traditional methods restore the signal of high frequency in low frequency, which has two weaknesses. On the one hand high frequency covers low frequency, on the other hand the methods change the energy of speech. These two aspects severely decrease speech loudness, perception and recognition. To solve the above problems, we have proposed an improved frequency shifting compression method based on Auto Energy Gain Compensation (AEGC) which is used for hearing aids. Fully investigating the relationship of speech frequency with energy and recognition, the scheme selectively keeps the information of vital frequency band. Meanwhile, it compensates the speech loudness with AEGC module. With the proposed scheme, it has obviously improved the speech perception and recognition. Both the theoretical simulation result and subjective test in APP on android platform show the energy is compensated and the speech recognition ratios are enhanced 20%-30% in different environments, especially efficient in quiet, noisy and normal environment.
An Efficient Image Encryption Using Merkle-Hellman, Elgamal and Genetic Algorithm for Color Images
Authors: Lokeshwari G. , Kumar S. Udaya , Susarla Sree Vidya
Published: January 2015

The proliferation of digitized media due to rapid growth of network multimedia systems has created an urgent need for information security due to the ever increasing unauthorized manipulation and reproduction of original digital data. In this paper an approach based on Merkle-Hellman, ElGamal and Genetic algorithms is proposed for data encryption and decryption. The strength of the cipher is increased further by using genetic algorithm. Experimental results show that the proposed approach can be implemented on images of any size which retain the quality of the image while retrieving the original image. This aspect helps in providing the reduction in block size without compromise in the quality of the image and security as well.
Adaptive Mean Ridgelet Transform Filtering for Detecting Signal and Comparison of Algorithm's Implements
Authors: Zhu Guang Ping , Sun Hui
Published: January 2015

For solving the problem which the performance of detection was reduced in the low signal to noise ratio (SNR) using Wigner-Ville Hough transform (WHT), the method of XWVD adaptive mean Ridgelet transform filtering (XWVD-M-FRIT) was proposed. In this method, due to the power distribution of signal is different from noise or reverberation in time-frequency domain, so designed adaptive axial mean filter, then using Ridgelet transform filtering to restrain noise or reverberation. At last, it is to detect the signal using Hough transform. The results of real and simulation experiments showed, compared with WHT, in the low SNR the new method is feasible to restrain noise or reverberation in time-frequency domain for improving the performance of signal detection. furthermore, the performance of varying implement of adaptive mean and Ridgelet transform filtering were compared.
Three-Dimensional Object Surface Reconstruction Based on Camera Calibration and SIFT
Authors: Zhang Jun , Ye Long , Zhang Qin , Wang Jing Ling
Published: January 2015

This paper is focused on camera calibration, image matching, both of which are the key issues in three-dimensional (3D) reconstruction. In terms of camera calibration firstly, we adopt the method based on the method proposed by Zhengyou Zhang. In addition to this, it is selective for us to deal with tangential distortion. In respect of image matching, we use the SIFT algorithm, which is invariant to image translation, scaling, rotation, and partially invariant to illumination changes and to affine or 3D projections. It performs well in the follow-up matching the corresponding points. Lastly, we perform 3D reconstruction of the surface of the target object. A Graphical User Interface is designed to help us to realize the key function of binocular stereo vision, with better visualization. Apparently, the entire GUI brings convenience to the follow-up work.
The Impact of Social Capital on Construction Safety Climate
Authors: Li Shu Quan , Wu Xiu Yu , Wang Yue Hui
Published: January 2015

The importance of safety climate on safety performance in construction has been highly acknowledged, and the definitions and elements of safety climate have been widely discussed over the years. However, researches about how to improve constructions safety climate have been less focused. The aim of this study was to find the impact of social capital on safety climate. A questionnaire of social capital and safety climate was conducted by 316 employees from 45 construction sites, and an empirical analysis was made by exploratory factor analysis (EFA) and structural model theory (SEM). The results showed that: the cognitive dimension and relational dimension of social capital are significantly positive correlation to safety climate, while the structural dimension is not significant. The findings of this study provide useful information to improve safety climate for construction enterprises.
A Multi-Objective Immune Genetic Algorithm for Project Scheduling on Multi-Skill Resources
Authors: Cheng Lu , Liao Guang Rui , Liu Zhen Yuan
Published: January 2015

In this paper, we address the project scheduling problem with the aim of making the best use of people's talents while minimizing project makespan and the amount of wasted resources. The purpose of proposing this problem is to assist project managers to improve the quality of products and save cost. To solve this problem, we also proposed an immune genetic algorithm (IGA). This algorithm designs feasible schedule for projects. By designing computational experiments carried out on j60 from PSPLIB, we evaluate the performance of proposed IGA as well as compare it with traditional GA. It turns out that proposed IGA performs much better in the aspect of improving diversity and minimizing makespan, which provides more diverse and effective solutions.
BIM-Risk System for Chinese International Contractors
Authors: Li Ya Ting
Published: January 2015

As the external environment of the international construction project has become increasingly complex, risk management is emphasized in the project management. BIM(Building Information Model) has bring change to the Construction Industry in China. It has contributed to the schedule and cost management. However, BIM is not widely used to solve the problem of risk management. This thesis cites the possibility about BIM application to risk management and evaluates the progress it may bring to the process of risk management. Furthermore, a BIM-Risk System is proposed for Chinese international contractors to solve some major risks the international contractors may face. By using this system, the level of the project risk management will significantly improve. Then the barriers and the potential problems of applying BIM to risk management in China are analyzed. The BIM application to risk management has great value to be further researched.
Influence of Water Content of Soil to Strength of Unfired Soil Lime Bricks
Authors: Purnomo Heru , Syah Rahmat N.D. , Syaifulloh Mochammad R. , Arini Srikandi W. , Basoenondo Essy Arijoeni , Satim Madsuri
Published: January 2015

The paper discusses strength-time relation of unfired soil-lime bricks in presence of different water content of soil as one of principal materials for the brick making. Two batches of soil-lime bricks were made with a mixture of lime, soil and water with a mass proportion of 1: 5.7: 1. Water contents of the first and second batch of soil are 30% and 40.581% respectively. Both batches of brick underwent compression and three point bending test. Absorption and physical change of bricks were also evaluated. Experimental investigation reveals that for both batches of bricks, up to 90 days compressive strength decreases a little but modulus of rupture rapidly decreases with time. The study shows that unfired soil-lime bricks with lower soil water content resulted in better strength performances compared to those with higher soil water content.
Experimental Analysis of Different Kinds of Sandstone for Reconstruction of Historical Masonry
Authors: Pavlík Zbyšek , Fořt Jan , Pavlíková Milena , Černý Robert
Published: January 2015

In reconstruction works on historical buildings, considerable expenses are spent. Therefore, it is desirable to assess durability of applied materials in the particular conditions of a specific building. This cannot be done effectively without the knowledge of their basic physical and hygric properties, which give information on materials performance within their exposure to harmful climatic conditions. In this paper, experimental analysis of five types of sandstone originally used over the Czech territory for historical buildings, monuments and ornamental parts of architecture, is presented. On the basis of obtained results, the materials behavior at real service conditions can be assessed, which is necessary information for their practical usage.
Simulation and Experimental Analysis of the Infrared Detection for Surface Cracks of Metal Pipes with Penetration Treatment
Authors: Wan Xiong
Published: January 2015

Working in the corrosive environment for a long time, it is easy for metal pipes to produce stress corrosion cracks which will affect the use. An infrared detection method combining permeate treatment with heat-incentive steam is proposed to detect surface cracks, which then has been verified by simulations and experiments. For the simulation, pipe model including four cracks of different depth and width was constructed by ANSYS. Transient thermal analysis was made after convection incentive loaded on internal and external wall in the case of whether or not undergo surface infiltration processing. For the experiment, pipe including cracks were made the same as simulation parameters, then experiments were made using the thermal excitation system in two cases. Surface temperature distributions of the pipe were compared in two cases, the results of the study show that penetration treatment before heat incentive can significantly improve the surface crack detection sensitivity.
High Step-Up Converter Series Based on the Diode-Capacitor Network
Authors: Chen Qi , Wu Yu Qi , Ma Jia Lin
Published: January 2015

This essay is about the application of a diode-capacitor network on conventional non-isolated DC–DC converter. The study will focus on obtaining high step-up voltage gain, low switch voltage stress, simple control, and high conversion efficiency. Three single-switch step-up converters with high step-up ratio based on the diode-capacitor network are proposed. The principle of operation and theoretical analysis of every single-switch step-up converter is evaluated for both continuous and discontinuous conduction modes. Given the mirror-symmetrical characteristic of the diode-capacitor network, cascade single-switch step-up converters based on the single-switch positive-output step-up converter are achieved when several diode-capacitor networks are arranged in series. Simulation analysis and experimental results obtained from the implemented prototypes operating at 40 kHz are provided to verify the performances of the proposed step-up converters.
Structure Design and Torque Characteristics Analysis of a Novel Transverse Flux Permanent Magnet Motor
Authors: Zhuang Yu Feng , Hu Ze Yan , He Kai
Published: January 2015

A new type of transverse flux permanent magnet motor with surface-type permanent magnet rotor structure and silicon steel stator structure was designed. According to the new structure of transverse flux permanent magnet motor, the operating principle of the motor was given. The relationship among motor output torque, torque density, magnetic poles and winding parameters are deduced, and a reasonable method of designing motor size parameters was proposed. A three-dimensional finite element model of the motor was created and the model grid division was done using ANSYS finite element analysis software. According to different winding current values and different positions of stator and rotor, the motor magnetic flux density distribution, the output torque and inductance parameter were given through calculating the three dimensional finite element models. Finite element analysis results show that the new motor structure is reasonable.
The Study of Knowledge Based Geographic Information System
Authors: Shen Hong Liang , Yang Chang Bao , Liu Guo Cheng , Ma Sheng Zhong
Published: January 2015

The purpose of this paper is to develop a practical method which integrate the mighty function of GIS with KBS (Knowledge Based System) .It emphatically bring forward a prototype of KBGIS. The research is an example of GIS-KBS integration in which the elements of KBS techniques are actually integrated with GIS. The idea of the prototype KBGIS system design was to put the model, data, domain knowledge, and the system's knowledge acquisition and reasoning mechanism and GIS together into a same environment.
Soft Decisions of D-PSK Demodulation for G3 OFDM Technology
Authors: Zhang Yan Yu
Published: January 2015

G3-PLC, an orthogonal frequency division multiplexing (OFDM) power line communication solution, has recently gained a lot of attention. It supports the application of four types of baseband mapping modes in different environments. These modes typically require a hard-decision demodulation, which will lead to nearly 3dB preference loss. In this paper, we propose an improvement scheme for the baseband mapping modes by changing the constellation encoding method. The optimal soft decision algorithm which makes use of log likelihood ratio (LLR) of the probabilities is used in the demodulators. Simulation results show that the proposed scheme can outperformer previous algorithm.
Electrical Property of Methylcellulose/Chitosan-NH4NO3-EC Plasticized Polymer Electrolyte
Authors: Zazuli N.L.M. , Khiar A.S.A.
Published: January 2015

Polymer electrolytes blends of methylcellulose (MC)/chitosan-ammonium triflate (NH4CF3SO3) plasticized with Ethylene Carbonate (EC) were prepared by solution-casting technique. The effect on electrical property was investigated by impedance spectroscopy. Sample with 45 wt% of EC exhibit the highest room temperature conductivity of 2.16 × 10-4 Scm-1. Dielectric data were analyzed for the sample with the highest conductivity.
Sixth-Second Order Normalized Cumulants Blind Equalization Algorithm Based on T/4 Oversampling
Authors: Zhang Xiao Qin , Hu Yong Sheng , Zhang Li Yi
Published: January 2015

Most existing blind equalization algorithms rely on partial or complete channel identification, but the channel order estimation is always a difficult task. In this paper, higher order normalized cumulants analysis is applied to the blind equalization, and a new sixth-second order normalized cumulants blind equalization algorithm based on oversampling is proposed. The proposed method recovers the transmitted sequence adopting optimization algorithm of sixth-second order normalized cumulants without channel identification and channel order estimation. Simulation results show the algorithm's effectiveness.
Influence of the Distribution of Dual Cascades on Double Vanes Based on the Solid-Liquid Two-Phase Flow
Authors: Liu Fu Chun , Zhang Jian Rong , Wang Dong
Published: January 2015

The relative positional relationship between the stay vanes and guide vanes is researched to analyze the impact on the hydraulic performance of the Turbine based on N-S equations and RNG k-ε turbulence model under the conditions of sandy water with the numerical simulation method.There are main five kinds of the relative positional relationship between the dual cascades is used to analyse the trends of the distribution about the pressure and velocity. The relative circumferential positions between the dual cascades have obviously effect on the flow verified.And the velocity vector and the pressure distribution on the surface of the guide vanes are studied further.The results show that energy performance is best if little circumferential position differences between the dual cascades in two typical conditions.However, thedistribution about the pressure and velocity is uneven on the active surface of guide vanes, exacerbating the local abrasion of the vanes.
A Fluid-Structure Interaction Based Numerical Investigation on the Outlet Condition of Artery Basic Model
Authors: Li Bai , Li Xiao Yang
Published: January 2015

Improving the numerical model of the hemodynamic is very meaningful to analysis the formation aneurysm, to predict the rupture risk and to provide operation plan. But the outlet boundary conditions are mostly determined pressure or velocity. So it is important to consider the transmission load of the outlet in the numerical simulations of the hemodynamic. Then we choose the porous media to approximate simulate the transmission load. We simulated a case with transmission load and a case without transmission load as the matched group. The result showed that the second pressure wave could only exist in the case with the transmission load, and the pressure range of the case with transmission load was more physiological. And there were evidences of the coupling relationship between the FSI blood flow to the transmission load. So it is necessary to consider the transmission load in the Blood flow dynamics problems.
Technical Research on Application of Warm Mix Flame-Retardant Noise Reduction Asphalt Mixture
Authors: Wu Xi Rong , Li Su Xian
Published: January 2015

Due to the special environment of the tunnel, the paper developed a kind of antiflaming, warm-mix and noise reduction asphalt mixture combined with engineering practice chishui tunnel project in jiangxi province. Asphalt mixture has good performance in low mixing temperature, flame retardant, noise reduction and better performance by using AMP flame-retardant and Evotherm DAT warmed-mix technology. A series of test are carried out to analyze the characteristics of high temperature rutting, low temperature crack resistance and water stability of warmed mix flame retardant noise reduction asphalt mixture and Ordinary hot mix asphalt mixture. The result show that, compared with the pavement performance of ordinary hot mix asphalt mixture AC-13, the new type of asphalt mixture OGFC-13 has good cooling, flame retardant and noise reduction performance.
Research on Microscopic Damage of GFRP Tensile Properties
Authors: Chen Zhi , Huang Dan , Dou Bin Qiang , Cui Shuo
Published: January 2015

The tensile failure of fiber reinforced composite is a progressive damage process. Combined with microscopic analysis measures to study matrix, fiber and interface, the failure mechanism of material would be further researched. Two different types of matrix of GFRP bars were selected in the tensile test. The results of tensile test and SEM observations revealed: the vinyl GFRP bar has better composite material structure and interface than unsaturated polyester, and the progressive damage level of unsaturated polyester bar is higher than vinyl in the same stress state; There are clear links between the tensile strength and meso-structure change with different uniaxial stress; When the load exceeds 80% of the failure load, the meso-structure exhibit obvious split between fiber and matrix, and body damage and stripping between fiber and matrix are correlative.
A Molecular Dynamics Study on the Physical Properties of (CuPd)147 Alloy Nanoparticles
Authors: Sun Ling Tao , Shi Dong Ping , Guo Chao Zhong , Xiao Xu Yang , Bai Jing
Published: January 2015

The melting of CuPd bimetallic clusters was studied by using molecular dynamics with the embedded-atom method. The results show that the same number of Cu atoms with Pd clusters, their temperature curve of clusters and the melting point value can be induced by the process of Cu atomic segregation to appear big differences. According to the analysis of HA index and clusters snapshot image, the singular phenomenon is caused by hierarchical differences between Cu atomic distances from the inner surface segregation. It is concluded that the difference of the melting point of Cu-Pd bimetallic clusters provides an effective method of controllable preparation.
Properties of TiO2 Thin Film Prepared by Sol-Gel Dip Coating
Authors: Wang Jun , Bai Ling Yun
Published: January 2015

TiO2 thin films were prepared on glass substrates by sol-gel method. The effect of withdraw speed on the thickness and optical properties of TiO2 thin films was investigated. The films were transparent in the visible wavelength. The thickness of the TiO2 films was increased from 90 nm for the withdraw speed of 1000 μm/s to 160 nm for the withdraw speed of 2000 μm/s. While, The refractive index of the TiO2 thin film decreased from 2.38 to 2.07. It may be due to the porosity of the film was increased. The optical band-gap of the films was around 3.45 eV.
The New Progress on Synthesis of Cadmium Selenide and Lead Selenide Nanostructures
Authors: Zhang Ya Hui , Cheng Xi , Wang Qing
Published: January 2015

Cadmium Selenide and Lead Selenide have been the subject of considerable interest because of its potential applications in many fields. In this paper, the synthesis of Cadmium Selenide and Lead Selenide nanostructures is described. The Morphologies of as prepared metal selenide nanostructures are summarized. And the applications and prospects of metal selenide in this field also are analyzed.
On the Chemical Reduced Large Specific Surface Area Graphene Oxide and its Electrochemical Performances
Authors: Liu Li Lai , Zhang Hai Jiao , Li Shuang , Yang Chao , Yang Pei Xia
Published: January 2015

Graphene oxide is prepared by modified Hummers method with the expanded graphite prepared from large flake graphite as raw material. The large tracts of graphene sheets prepared by ascorbic acid chemical reduction of graphite oxide are characterized by scanning electron microscope and X-ray diffraction. The electrochemical performances of graphene sheets are studied successively. The results show that large tracts of graphene sheets as an anode for lithium-ion batteries exhibits a high capacity of 1693 mAh·g-1 after initial discharge at a current density of 100 mA·g-1 and remains 426 mAh·g-1 after 100 cycles. The graphene sheets show good cycling stability even at high current density. The reversible specific capacities remains 218 mAh g-1 at the current densities of 1000 mA g-1 after 100 cycles.
Thermodynamic Equilibrium Calculation of Oxygen-Fuel Process of Calcium Carbide Production
Authors: Tian Ying , Yan Wei Ping
Published: January 2015

The oxygen-fuel process of calcium carbide production refers to the application of oxygen-enriched combustion technology in production of calcium carbide and the method was introduced. The material and thermal equilibrium calculation of this method were done, and compared with electric arc process. The power consumption was greatly reduced and the production temperature of CaC2was reduced, the more economic income of the method can be gained through the comparison, at the same time which can provided theoretical support for the follow study of this method.
Effect of Doping Metal Ions on the Structure Transformation of Octahedral Layer Structure Manganese Oxide
Authors: Zhou Chen Liang , Fang Bin Zheng , Cao Jian Wei , Zhang Na , Han Jia Li , Li Hui , Gao Xiao Long , Wang Xi Dong
Published: January 2015

The Octahedral layer structure manganese oxides (Buserite and Birnessite) have been synthesized and modified by aging a MnOx gel which was produced from the redox reactions between Mn2+ and MnO4- in the presence of other metal cations (Mg2+, Ni2+, Co2+ or Cu2+). The present study investigates the structure transformation between Buserite and Birnessite using X-ray powder diffraction conducted on cation doped manganese oxides at different stages of before and after hydration. The results indicate that introduction of Mg2+ into the interlayer can completely achieve the structure transformation between Birnessite and Buserite after hydrated at 24h, and Ni2+ can partially reverse.
Pyrolysis Characteristic of Nitrogen in Carbon Fibers during High-Temperature Heat Treatment
Authors: Gao Ai Jun , Zhang Zuo Guang , Xu Liang Hua
Published: January 2015

Pyrolysis mechanism of nitrogen in carbon fibers, heat-treated at various temperatures, was investigated, in relation to the nitrogen chemical bonding states. Nitrogen content shows exponential decreasing with increased temperature and extended time. The pyrolysis of nitrogen exhibited time-temperature equivalence. Nitrogen atoms containing hydrogen in the amorphous region and at the edge of microcrystalline, and the double-bonded nitrogen in pyridine rings are easily pyrolyzed, while nitrogen atoms in the six-member ring of the graphite sheets are difficult to be pyrolyzed.
Band Gap Characteristics of Phononic Crystal Made from Different Material
Authors: Yan Xin
Published: January 2015

The band gap characteristics of phononic crystal is influenced by material and structure etc. Based on the transmission matrix method, the first band gap characteristics of one-dimensional phononic crystal were numerical simulation with different ratio, and these phononic crystals were made form aluminum, lead, steel, carbon and epoxy resin materials. These results show that phononic crystal structure made from high density materilal are more easier to form wide band gap, and there are also more easier to form wide band gap under the same proportion. These results provide theoretical basis for the design of one-dimensional phononic crystal devices.
Fabrication of Micro Electrode Array by UV-LIGA and its Application in Micro ECM
Authors: Li Han Song , Hu Yang Yang , Wang Guo Qian , bin Zeng Yong
Published: January 2015

In this paper, a fabrication process of ultra-high metal micro electrode array by means of UV-LIGA technology and its application in micro Electrochemical Machining (ECM) was investigated, and a new aided method, which can completely remove the ultra-thick cross-linked SU-8 resist without leaving remnants of the resist or destroying the electroplated microstructures, was advanced. During the lithography process, 1mm thick SU-8 moulds of different patterns were fabricated on the substrate. Before the electroforming process, a through-mask electrochemical micromachining (through-mask EMM) procedure was carried out to process micro roots on the substrate, the processed micro roots could improve the adhesion of micro electrode array electroformed on the substrate. After the electroforming process, cross-linked SU-8 resist was removed by the hot remover PG (MicroChem). Under the optimal experiment conditions of this fabrication process, the electrode arrays up to 800μm high of different shapes were fabricated. Finally, the fabricated electrode arrays was used as cathode to machine micro hole arrays on stainless steel by micro ECM.
Research on the Fabrication of Bioceramic Composite Coatings Fabricated by Nd-YAG Laser Cladding
Authors: Wang Ying Chun , Lv Xiang Fei , Zhu Deng Jie , Qu Shao Min
Published: January 2015

Laser surface cladding is a material processing technique to overlay the precursor material with the substrate to form a sound chemical and metallurgical bonding. Recently, laser cladding technique has been introduced in the bioceramic coating field. This paper presents a new technology to obtain bioceramic composite coating on Ti6Al4V substrate by Nd-YAG laser cladding. The microstructures of the mixed powders and cladding layer were investigated by scanning electron microscopy, and the compositions were analyzed by electron diffraction spectroscopy. The phases of the mixed powders and cladding layer were clarified by X-ray diffraction technology. Composite coating including HAP,Ca2P2O7,Ca3(PO4)2 and calcium titanates was successfully obtained by Nd-YAG laser cladding with pre-depositing mixed powders of CaHPO4·2H2O and CaCO3 directly on Ti6Al4V substrate. The average grain size of the mixed powders is 3μm from the image analyse software. The most important parameter that affected the completion of laser cladding was the scanning speed.
Failure Mode and Experimental Method Research for Bond-Slip of Cold-Formed Thin-Walled Steel and Foam Concrete Composite Member
Authors: Liu Dian Zhong , Wang Fa Yu , Li Bo , Wu Qiong
Published: January 2015

According to the previous experimental research on bond-slip, select push-out test as experimental method research on bond-slip between cold-formed thin-walled steel and foam concrete. Through the observation of the specimens in the push-out test, combining with the natural bonding mechanism and influencing factors summarized the failure mode and its law of composite member. The reference and basis for the experimental research and theoretical analysis of it in the future are provided.
Research of Influence Factors on Freeway Incident Detection
Authors: Yang Zhi Yong , Yan Gui Yun
Published: January 2015

This paper analyzes the kinds of freeway traffic incident and influences on traffic flow of recurring traffic incident and non-recurring traffic incident. It is full of interest and very useful. By using the traffic simulation software TSIS(Traffic Software Integration Systems) to obtain correlation traffic data which is needed when researching, then study and analyzes how to choose traffic parameters which are mainly traffic low speed, occupancy and lane occupancy of traffic incident detection. After analyzing the simulation data, we can find that it is more reasonable that choosing the vehicle lane occupation rate as detection parameter of traffic incident.
Investigation into Corrosion Fatigue Life of Spherical-Headed Cylindrical Shell
Authors: Xu Wei Jun , Guo Qi Xing , Wang Xiao Tian
Published: January 2015

Corrosion fatigue is of great significance in research of submarine structure operating in marine environment for long term since the seawater corrosion effect will reduce the resistance to fatigue failure of structure components. The paper interests on the introduction of pitting corrosion and analysis method of corrosion fatigue life. Finite element method was adopted to analyze the stress concentration factor of pitting corrosion and local corrosion fatigue of spherical-headed cylindrical shell with following conclusion. In the estimation of corrosion fatigue life of spherical-headed cylindrical shell, the proposed formula has some practical value, and only the corrosion fatigue of structure surface should be considered.
Furniture of Environmental Protection Materials
Authors: Wang Ming Gang , Tian Yue
Published: January 2015

Today, we attach great importance to environmental protection, emphasizing green materials. Extensive long-term changes in the furniture industry production mode, and create green furniture industry, the most important is the use of environmentally friendly materials. This paper makes a brief introduction to the status of raw materials of traditional furniture manufacturing, and then discusses the environmental protection materials for furniture made ​​systematic.
Laser Arc Hybrid Welding Properties of ZL114 Aluminum Alloy
Authors: Dong Kai
Published: January 2015

Selection of eight kinds of process parameters were performed on cast aluminum alloy ZL114 8mm thick plate cylinder and 5mm flat laser - arc hybrid welding, weld microstructure by comparing the morphology and size, considering the cost of internal defects and workmanship proposed to optimize the process parameters programs, microhardness and other properties of the weldment joints specimens tensile strength.
The Structural and Optical Properties of Al Doped ZnO Thin Film
Authors: Cao Ping , Bai Yue , Qu Zhi
Published: January 2015

Al doped ZnO thin film have been prepared by a sol-gel method. The structural, and optical properties of the sample were investigated. X-ray diffraction and X-ray absorption spectroscopy analyses and UV absorption spectroscopy analyses indicate that Al3+ substitute for Zn2+ without changing the wurtzite structure. With the Al doping, the visible emission increased and the UV emission decreased, which is attributed to the increase of O vacancies and Zn interstitials.
Time Interval and Chilling Effects on it during the Forming Process Surfacing Deposition Forming
Authors: Liu Jian , Xu Xiao Ming , Zhu Sheng , Meng Fan Jun , Yin Feng Liang
Published: January 2015

In this paper, time interval between neighbored layers during the forming process of Surfacing Deposition Forming is defined. Then, surfacing deposition forming are experimented on Cu chilling pedestal and cast iron pedestal individually, the experimental data are processed with Matlab software to research the relationship between time interval and forming layer number, and t method of inspection is exploited to verify the validity of this relationship, even chilling effects on this relationship is studied at the same time. The result shows that: Time interval between neighbored layers would rise more and longer along with the progress of the forming process, and it has a linear relationship with layer number in generally; As the chilling effect, time interval is shortened prodigious, and its relationship with layer number changed to be a cubic curve function.
Co-Simulation on Walking Hydraulic System of Tandem Roller Based on AMEsim and ADAMS
Authors: Li Jia Qing , Xie Dong , Feng Zhong Xu
Published: January 2015

Owing to high performance of surface compaction, tandem vibratory roller has been used widely today. However，the start- stop dynamic process of vibratory roller has brought some problems that seriously affect the performance and reliability of the vibratory roller. This paper discusses the dynamic characteristics of hydraulic system, does co-simulation of hydraulic system and mechanical system by applying AMEsim and ADAMS, and studies suppression method of the inertial load of walking system. Research of the thesis proves that this method can improve the dynamic quality and reliability.
Capillary Filling of Ferrofluid in Homogeneous Hydrophilic PDMS Microchannels
Authors: Kuo Ju Nan , Yang Bo Zhi
Published: January 2015

The capillary filling speed of ferrofluid in hydrophilic polydimethylsiloxane (PDMS) microfluidic channels is investigated under various temperature and magnetic field conditions. Microchannels with a depth of 100 μm and widths ranging from 100 to 400 μm are fabricated using conventional photolithography techniques and an oxygen plasma bonding process. The capillary filling speed of the ferrofluid is measured experimentally and compared with that of DI water. It is found that the filling speed of the ferrofluid is significantly lower than that of DI water. Moreover, the filling speed reduces with a reducing channel width, an increasing ferrofluid concentration, a lower operating temperature, and an increased filling length. By contrast, the filling speed increases under the effects of an external magnetic field.
The Structure Optimization Design for the W-Type Metallic Sealing Ring Based on the MOGA Algorithm
Authors: Ding Xiang Yu
Published: January 2015

This paper uses the ANSYS software to analysis the outer arm opening angel(OAOA) and the outer arm arc angle(OAAA) of W-type metallic sealing ring which can effects on the mechanical properties,obtained in that when the OAOA choose from 1.398°to 14.156 °and the OAAA choose from 30.21° to 59.5 °, the mechanical properties of the sealing ring can satisfy the requirement of use. Then using the MOGA optimization algorithm to optimize the design of W-type metallic sealing ring, and find when the OAOA choose 3.39°and the OAAA choose 32.18°are the optimal design of the W-type metallic sealing ring.
Dynamic Stability Analysis of Mountain Hollow Thin-Walled High Pier under Impact Load
Authors: Yang Hong Tao , Li Rui , Chen Zhi Qiang , Yue Zhang
Published: January 2015

Hollow thin-walled high pier is a common form of high pier in mountainarea, so it is of practical significance to the dynamic stability analysis ofhollow thin-walled high pier in mountain area. This paper is taking themountainous area of a hollow thin-walled high pier as the background, and theestablishment of the fiber model with Midas for dynamic elastic-plastic timehistory analysis. The results show that: the hollow thin-walled high pier underthe impact load, load amplitude is lower than the critical load,and the dynamic response characteristics of thestructure of the value parameter i.e. horizontal displacement at pier top increaseslinearly with the load amplitude. When the load amplitude is larger than thecritical load, the horizontal displacement of pier top increases with theincrease of load amplitude nonlinearly. Power under dynamic load instabilitycritical load is about 80% under static load.
Follower Effect of Internal Pressure on Modal Analysis of a Space Inflatable Structure
Authors: Liu Fei , He Wei Liang
Published: January 2015

The stress distribution and modal behavior of a space inflatable torus was investigated by nonlinear finite element numerical method. This paper focused on the effect of follower pressure on the modal analysis of the torus, including the effect of configuration change and follower pressure stiffness, and focused on validating the follower pressure stiffness FEM model and its applicability to modal analysis. Research shows that the changed configuration slightly increases the natural frequencies. The follower pressure stiffness significantly reduces the natural frequencies and changes mode shapes order. The modal results are in good agreement with the corresponding shell theory solutions, indicating that the finite element model of the follower pressure stiffness for the inflatable structure modal analysis in this paper is accurate enough and reasonable.
Fatigue Loading Tests and Acceptance Criteria of Reinforced Pre-Stressed Concrete Railway Sleepers
Authors: Karmazínová Marcela
Published: January 2015

The paper is focused on the problems of the fatigue behaviour, failure and resistance of reinforced pre-stressed concrete railway sleepers, developed and verified continuously in the period of several last years. The results of fatigue loading tests are presented for the sleepers for both wide and narrow track gauge. Test results have been evaluated using the criteria for the acceptance based on the load corresponding to the prescribed crack width and the load at the moment of total fracture.
Design of Fuel Cell Monitoring and Control System Based on LabVIEW and CAN Bus Communication
Authors: Liu Xu Tao , Wang Zhi Wen , Wei Dong , Lai Xiao Long
Published: January 2015

In order to realize monitor and control multiple fuel cell group, design a PEMFC monitoring and control system. The system uses LabVIEW as the computer software platform. By calling the USBCAN card’s driver, LabVIEW realize the communication with CAN bus; By connecting with each data acquisition and control module,the CAN bus can realize data acquisition and hardware control, so as to realize the monitoring and control of the fuel cell system by the computer.
Intelligent Research about Automate Substation Primary Equipment
Authors: Wang Wen Long , Huo Ning Ning , Li Xue Lian
Published: January 2015

With the acceleration of smart grid construction, intelligent become the development direction of the automatic substation, primary equipment is an important part of intelligent smart grid, running for safe and reliable operation of the substation automation is significant. This article briefly describes a device in the form of intelligence, once analyzed the working principle of intelligent devices and describes the intelligent transformers, circuit breakers and other primary equipment implementation.
Analysis of the Influence of Sea-Surface Reflection on Locating the Underwater Sound Source
Authors: He Qi Wei , Xu Guo Liang , Ding Shao Chun , Dai Zhen
Published: January 2015

When test the underwater acoustic in the half-space which the sea-surface separate the free-space to,the conventional technology of PNAH can't be used to locate the underwater sound source.In order to solve the impact of the sea-surface reflection on the underwater acoustic testing,in this paper,use the method of mirror imaging to correct the sound field in the half-space.In this paper,introduce the principles and procedures of the method of mirror imaging to correct the sound field in the half-space.Simulate that make a sound field transformation of the corrected sound field in the half-space by the technology of planar near field acoustic holography in order to reconstruct the sound field of sound source surface.The simulation results show the influence of the sea-surface reflection on locating,and verify the effectiveness that use the method of mirror imaging to solve sea-surface reflection.Works above provide a reference for locating the underwater sound source.
Process Modeling of CuO/Zeolite Preparation for CODCr Removal from Acid Bright Red GR Wastewater
Authors: Liu Ting , Jiang Bo Quan
Published: January 2015

The study on CuO/zeolite preparation for CODr removal from acid bright red GR wastewater was carried out. The optimal process parameters,with zeolite/copper nitrate solution ratio of 1:4 g/mL, copper nitrate solution concentration of 1.0mol/L, calcining temperature of 400°Cand calcining time of 5 h, were determined by single test method .The CuO/zeolite prepared under the optimal conditions obtained high CODCr and chroma removal rates with more than 87%and 99,9%,respectively.The process model of CuO/zeolite preparation was established by response surface methodology. The model was proved to be reliable and accurate and its theoretical values were very close to the the actual test values with absolute relative errors ranged from 0.00% to 1.49%, which can be used to predict, adjust and control the process conditions of CuO/zeolite preparation for getting desired CODCr removal rate.
Data Center Protection Problems in the Zombie Network
Authors: Sun Lei , Du Wei , Che Na
Published: January 2015

With the development of the Botnet, new botnets use the peer-to-peer (P2P) protocol (such as for eMule download) appear, which have brought great challenges in detecting and preventing of botnet in the data center.27100Point to point protocol uses more decentralized control method, so information between each node can be shared, and each node has the function of connecting and recovering, which leads to that the class of Botnet is hard to be closed. In the protection of Botnet the data center also found that there are more and more botnet uses the high strength encryption technology after implanting into hosting, which makes the application layer information of the whole communication process be invisible to zombie network protection system for data centers , resulting in many missing events on the recognition and Influences the safety management effect. The specific point of view, point to point protocol and communication method based on encryption led to the that a data center in the botnet protection system is difficult to deal with effectively
Thermal Comfort Study Based on Airflow within a Passenger Compartment
Authors: Xiang Li Ping , Wang Han Qing
Published: January 2015

It is important to analyze the temperature, airflow field, PMV-PPD index distribution within the passenger compartment to ameliorate the amenity and decrease consumption. A numerical model to assess the thermal comfort taking into account the different air velocity. This paper uses commercial software FLUENT to simulate 3-D temperature, PMV-PPD index distributions and flow field in a compartment passenger. The predicted results basically meet the requirement of thermal comfort except the local temperature around the lower region and the local air velocities around passengers’ head region. When the air-outlet temperature is 20 °C, air-outlet velocity 4 m/s is agreed to the thermal comfort. PMV index are about -0.4-0.6, and PPD index is less than 10%, which is agreed with passenger’s thermal comfort. The predicted values illustrate the uniformity of indoor environment in the occupied zone.
Green Composite Scale Inhibitor in Central Air Conditioning Cooling Water
Authors: Li Mao Dong , Zuo Xian Di , Yang Bo , Zhao Jun Ming , Chen Ying Tong , Guo Si Xue
Published: January 2015

With the improvement of living standards, air conditioning becomes the requisite of people’s life; the central air conditioning has become each big building of major appliances[1]. In the whole air conditioning cooling water treatment system, such as scale and sludge which is formed by the metal corrosion phenomenon, will seriously affect the use efficiency of air conditioning. One of the effective solution is adding scale inhibitor to the circulating water. Calcium carbonate deposition method is used to evaluate the scale inhibition rate of PASP, PESA and poly glutamic acid. then evaluate the scale inhibition rate of two compound formula. Results show that PESA with the best scale inhibitor performance, on the basis of its, respectively, compound with PASP and poly glutamic acid. The compound repice can improve the efficiency of scale inhibition. The optimized prescription is that, the PASP is 4mg/L, the PESA is 6mg/L, at this time of scale inhibition efficiency can reach 93.43%.
Application of Comprehensive Identification Indexes in Water Environment Evaluation of Taihu Basin
Authors: Hu Ya Jie
Published: January 2015

Water environment protection was one of the most important priorities in Taihu Basin, resulting in the importance of water environment evaluation. It was used to evaluate water quality of Taihu Basin by three methods of single factor index, comprehensive identification index and improved comprehensive identification index, including dissolved oxygen (DO), permanganate index (CODMn) and ammonia nitrogen (NH3-N), which distributed in six typical water quality monitoring sections. Results show that the main pollutant is NH3-N in Taihu Basin, especially Qingpu and Jiaxing, which indicate the main managements are to reduce the eutrophication and blue algae blooming. Comparison of these evaluations, the results of improved comprehensive identification index are reliable to the true condition of water environment.