bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the New-Style Building Materials in Civil Engineering — Architectural Sandwich Panel and its Application
Authors: Pan Lin , Han Chun
Published: September 2012

As a new type constructional material, sandwich panels are applied in engineering more and more. The structural characteristics of sandwich panels are described. The research on the sandwich panels is reviewed. The careful items of sandwich panels in practical engineering are investigated. Some new problems of sandwich panels are put forward for engineering researchers. It is helpful for engineers to learn the sandwich panel’s capacity in detail, which will be benefit to the sandwich panels applied in the practical engineering effectively.
Finite Element Analysis of Dual-Angle Variable of Four Steel Angle Composite Joint with Steel Materials in Civil Engineering
Authors: Jia Yu Zhuo , Zhao Li
Published: September 2012

In the multiple-circuit on same tower UHV and large crossing transmission tower,The main material of towers usually using a composite section in the form of the dual-angle and four steel angle. Dual-angle and four steel angle connections are inevitable. 500KV Jianbi - Danfeng four circuit transmission line project for the background, Using the finite element software ANSYS10.0, Composite Joints three-dimensional nonlinear finite element simulation. Clear the path of force transferor the node, Mechanical behavior of gusset plate and node failure modes. The results show that: node failure modes for the strength failure, The ultimate bearing capacity of the node is about three times the load of the node design, Node design is relatively conservative, By reducing the thickness of the gusset plate to lower node weight.
The Research of Pure Bending Flanged Beam’s Stress Distribution in Civil Engineering
Authors: Pan Jian Ou , Jia Yu Jing , Cheng Guang Zhen
Published: September 2012

Experimental method is an important means to research the mechanical properties of materials in civil engineering. In this paper, first, analyzing the section of pure bending beam’s normal-stress distribution, drafting the measure scheme of flanged beam’s pure bending normal-stress, arranging measuring point in different place about the section of pure bending, adopting multi-function composite test-bed, static strain gauge and other testing instrument, by step loading, to finish the measure of each measuring points’ stress and strain, also, analysis and treatment for test data. According to the result of analysis and treatment, pointing out that measured stress and strain of pure bending beam is proportional to loading. The measured normal-stress distribution of the pure bend beam is uniform with theoretical analysis, which is satisfy the engineering demand. Knowing and mastering multipoint measurement technology and method is an effective means for the scientific research.
Material Stress Analysis of Hydraulic Support in Deeply Inclined Top Coal Caving Face Based on Virtual Prototyping Technology
Authors: Cao Lian Min , Zhao Wen Ming
Published: September 2012

Modeling hydraulic support used in deeply inclined top coal caving face by using virtual prototyping technology and analyzing support structural parts using COSMOS/Works, which is inner set in the Solidworks software. The result mainly reflects hydraulic support material stress characteristics, and therefore provides direction and reference for design improvement.
A PCR-DGGE Approach to Evaluate the Influence of Environment Materials for Civil Engineering-Different Carbon Sources on a Catching Bed Biofilm Reactor in Start-up Phase
Authors: Zhang Yan , Wang Li Li , Yang Zheng Yang , Zhao Xu Ying , Liu Huan Guang , Zhu Min
Published: September 2012

In this study, the effect of environment materials for civil engineering was investigated through two sets of parallel reactors with sodium acetate and starch as carbon source separately. The reactors were started up by two stages, including biofilm formation stage and biofilm domestication stage. In biofilm domestication stage, the average removal efficiencies of COD were 88.84% and 88.78% respectively. NH4+-N removal efficiencies were reached at 99.28% and 91.90%. Total nitrogen（TN）removal efficiencies were 45.25% and 45.45%. By PCR-DGGE, it was found that there were high similarities between biofilm and suspension in the reactors. Different types of carbon sources enriched different types of microorganisms. The study can provide references for studying simultaneous nitrification and denitrification（SND）and optimizing carbon sources.
Discussion on Green Building Materials
Authors: Yu Xiao Qing , Lin Mao , Jia Li , Lu Yu Song , Wei Na
Published: September 2012

This paper mainly introduces the background and meaning and the basic characteristic of the green building materials. Through to several green building materials, demonstrates performance and value in use of green building materials, green building materials in construction works and looking forward to green building materials in the future development prospects and trends.
Impact of Degree of Polymerization Combination on Structure and Properties of Cellulose Membrane
Authors: Li Jin Bao , Zhang Mei Yun , Xiu Hui Juan , Li Xin Ping
Published: September 2012

Influence of degree of polymerization (DP) on the microstructure, crystallinity and strength properties of cellulose membrane were investigated in this paper; especially put forward a method of mixing different DP cellulose at different proportion to discuss more accurately effect of DP. The results show that the membrane at the proportion of 3:1 possesses the loosest structure, followed by 1:3 and 1:1 in turn. Cellulose’s crystalline structure had changed during NMMO process, and transformed from cellulose Ⅰ in cellulose pulps to cellulose Ⅱ in regenerated cellulose membrane, but could not form cellulose Ⅰ again. In addition, it can be found that crystallinity decrease remarkably, and the lattice size also reduces to a certain extent. Cellulose membrane at the proportion 1:1 was of the highest crystallinity and tensile strength, but its elongation keeps a continuous decline as mean DP decreasing.
Study on Synthesis and Characterization of AgCl Microparticle Materials Based on One-Step Solution Phase Route
Authors: Liao Juan , Zhang Kai , Wang Wen Zhong , Wang Yong Gang , Yu Li
Published: September 2012

AgCl microparticle materials, with novel heart-like morphology, were successfully prepared by means of a simple solution phase route, in which a small amount of hydrochloric acid, ethylene and PVP were introduced to the conventional polyol process. The obtained microparticle materials were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and UV-Vis absorption spectrum. SEM images show that the obtained AgCl microparticle materials have heart-like morphology with an average diameter of 3 um. The influence of different reaction times on size and morphology of the microparticle materials were also investigated. A possible growth mechanism of AgCl microparticle materials has been proposed on the basis of experimental results and analysis. The as-prepared AgCl microparticle materials would find possible potential applications in photocatalytic fields.
Study on Combustion Characteristics of Impurity Coal Based on TG-DTG-DTA
Authors: He Zhan Wen , Zhang Chuan Cheng
Published: September 2012

Abstract.Based on TG-DTG-DTA, combustion characteristics and kinetic parameters of impure coal in the 10 °C / min heating rate were studied. The results showed that with the increase in the proportion of impurities, ignition temperature, burned temperature significantly improved; combustion characteristics of index clearly decreased; combustion process can be described by a diffusion kinetic equation
Analysis of Two Cross Arm of Reactive Powder Concrete Pole Design with Structure Materials in Civil Engineering
Authors: Jia Yu Zhuo , Lin Li
Published: September 2012

SAP2000 structural analysis software is used to designed two of 500kV partially prestressed reactive powder concrete pole cross arm; moreover, poles of the two cross arm program have been compared. The results show that the triangular truss cross arm has good mechanical properties, improving the main mate’rial of the stress state, the pole reduced height 10m, by the analysis of the structure shows, this cross arm has higher reliability under the operating conditions, which can be used in 500kV transmission line; from economic and technical performance, the pole cost of this program is greatly reduced, while speeding up the construction progress and improving the comprehensive benefits of the poles in the transmission line.
Contrastive Analysis on Limitation Span between Suspension Bridge Using Steel and CFRP Cable
Authors: Jiang Yang , Jia Li Jun
Published: September 2012

Bridge constructions of crossing wider sea straits allowed the span of suspension bridge to move forward unceasingly, but the self-weight stress of the traditional high-strength steel as the material of main cable accounted for the ratio of allowable stress would be increasing with the growth of main span. That would limit the main span and load-carrying efficiency. Due to its high tensile strength，small mass density，excellent corrosion and fatigue resistant ability, the carbon fiber reinforced polymer(CFRP) was the ideal material for the main cable of suspension bridge. In this paper the limitation spans of two suspension bridge systems were studied by the static analysis and the theoretical formula derived from the ultimate strength of the main cable.
Simulation and Analysis on Supporting System of Composite Soil Nailing Technology in the Process of Digging
Authors: Guo Bing
Published: September 2012

According to the typical engineering example and the structural features of the supporting system of composite soil nailing technology, the computing mode of deformation of composite soil nailing technology under force is established. Numerical analysis and supervision in the process of construction on composite soil nailing technology are made with the collocation of typical project example. The data of monitoring on the spot and numerical simulation show that the supporting system of composite soil nailing technology meets the requirement of real deformation under force and can simulate the real features of the stress field and displacement field in the process of construction. The design methods meet the requirement of accuracy, and the result presents important technical reference for design and construction of the supporting system of composite soil nailing technology.
Study on Reconstruction of Elevation Structural Shape for Historic Industrial Buildings in Chinese Civil Engineering
Authors: Liu Yu
Published: September 2012

This paper studies the tactics for elevation reconstruction of which the purpose is to change the application function of the land occupied by historic industrial buildings during development and expansion of a city. During the well-targeted reconstruction process, reconstruction of the building elevations is especially important. for Chinese civil engineering This paper has analyzed the approaches for elevation reconstruction from several aspects and discussed the reconstruction execution tactics which is not only in line with the contextual features of the original building, but also reflects the new application function in Chinese civil engineering.
Growth and Spectral Properties of Ho3+,Tm3+ Codoped BaY2F8 Laser Crystal
Authors: Zeng Fan Ming , Zou Guang Tian , Liu Jing He
Published: September 2012

Ho3+:Tm3+:BaY2F8(Ho:Tm:BYF) laser crystal was grown by Czochralski method. The technical parameters as follows: the seeding temperature is 955°C; the pulling rate is 0.5mm/h; the rotation rate is 5rad/min; the cooling rate is 15°C/h; the period of growth is 6d. According to the spectra of crystal sample, the strongest absorption peak exists at 781nm, and the absorption cross section is 6.16×10-21cm2. While the strongest emission peak exists at 2056nm with the FWHM of 38nm, and the emission cross section is 4.05×10-21cm2, and the emission mechanism at 2056nm was analyzed based on energy level diagram of Ho3+ and Tm3+ ions.
Study on Surface Topography and Texture of Workpiece Machined by Tangential Turn-Milling
Authors: Ren Shan
Published: September 2012

By measure and calculate related parameters of Tangential Turn-milling machined surface profile, the fractal dimension of the surface was got when machined in different feeding and rotating speed . Results show that the fractal trait can express the information of workpiece profile surface texture ; With the increase of feeding, workpiece surface fractal dimension was reduced and the structure of surface texture was become thin; along the increase of ratio of revolution, workpiece surface fractal dimension was increased, the structure of surface texture was become compactness and have the lower surface texture height.
Fabrication of Pb-Free Sn-Bi Solder Using Polyoxyethylene Lauryl Ether
Authors: Zhang Sheng Hong , Chen Quan Fang
Published: September 2012

Lead-free solders have been gaining more and more attention recently. Sn-Bi system is one of the most promising candidates as the lead-free solder materials. In this article Polyoxyethylene lauryl ether (Brij 35) was used as the additive in the electrochemical deposition of Sn-Bi alloy. Various current densities and bath compositions have been investigated. Sn-Bi composites were successfully deposited on a copper substrate. The deposits were then characterized and studied by scanning electron microscopic (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and differential scanning calorimeter (DSC). Results indicate that the morphology and crystalline orientations are composition dependent. Intermetallic compound (IMC) was formed during the reflow process.
Research on the Environment Friendly Materials
Authors: Zhuo Yu Guo , Liu Jun
Published: September 2012

It is very important to study environmental friendly materials and its patterns for the development in the world. The concept of environment friendly materials was described and the significance of environment friendly materials comes from four aspects, and different kinds of application and research of environment friendly materials were introduced.
First Principles Study on Different Size of Pd-Doped CdS
Authors: Li Ming Ming , Wang Pei Ji , Ding Chuan Guang
Published: September 2012

The electronic structures and magnetic properties of Pd-doped CdS have been studied by FLAPW method in the GGA. We find that the Pd-doped CdS becomes 100% spin polarized at fermi level when Pd substitutes for Cd atom both in 3×3×2 and 2×2×2 CdS supercells. The supercell magnetic moment reaches to 2.0μB. At the same time, the magnetic coupling interaction makes the occupied states more localized. The magnetism, the density of states, the spin density and band structure were studied as well.
Finite Element Simulation of Large H-Beam in X-H Rolling Process
Authors: Wang Pei Qi , Zhang Qin He , Dong Bao Tian , Ma Ru Po
Published: September 2012

In order to research the hot rolling process of large H-beam, the thermal-mechanical coupling analysis and big distortion theory are used to simulate the whole X-H rolling process of HN900x300 by ABAQUS, in which the re-meshing technique is taken into simulation to increase the accuracy. Based on the simulation results, the stress and deflection of the roller as well as the metal flowing law and temperature field of workpiece are discussed emphatically. The results clearly show that the roller is subjected to alternating shear force and compressive stresses of three directions, and the metal of flange tends to flow from outside to inside. The simulation results are compared with the measuring results, which proves the correctness of simulation.
A Novel Technique for Arithmetic Elements Standard Cell Library Establishment Based on Tanner Tools
Authors: Zhao Chun , Zhao Ce Zhou , Da Bin
Published: September 2012

The economic and efficient accomplishment of an application-specific integrated circuit design depends heavily upon the choice of the library. Therefore, it is important to build library that full fills the design requirement. Tanner Tools is a set of software for designing integrated circuits. The great advantage of Tanner is that it can provide a complete circuit design tools in desktop computers. The paper aims to create a standard cell library establishment on the 0.5 micro complementary metal–oxide–semiconductor mixed signal process based on the Tanner Tools.
Electrical Properties of InSbN Alloys Fabricated by Two-Step Ion Implantation
Authors: Wang Y. , Zhang D.H. , Jin Y.J. , Chen X.Z. , Li J.H.
Published: September 2012

We report the electrical properties of the InSbN alloys fabricated by two-step implantation of nitrogen ions into InSb wafers, characterized by Hall measurements. The alloy with higher implanted dose shows lower electron concentration due to the acceptor nature of nitrogen. At temperatures below 150 K, the electron concentration does not change and follows an exponential relation at above 200 K. The Hall mobility in all samples monotonically decreases with the increase of temperature, indicating the phonon dominating scattering mechanism. The annealing results reveal that annealing temperatures up to 598 K make the carrier concentration lower due to the reduction of donor-type defects caused by ion implantation and the acceptor nature of nitrogen.
Design and Dynamic Analysis Optimization for a Kind of N-Degree Freedom Space Manipulator and Arm
Authors: Liu Jun Xiu , Deng Zong Quan , Sun Hu
Published: September 2012

Aiming at the urgent demand of lunar landing program of the second stage designs a space manipulator and arm with a flexible rotation, high precision, non-polluting and a vacuum operation from a long distance. Establish the dynamic equations for the structure and the motion of the space manipulator and analyze its inherent modals and static characteristic by finite element software Abaqus, Get the final optimization results. Sincerely hope that the work can promote the space manipulator and high-speed development and that we will realize early the dream of the landing on the moon.
Attenuation of Acoustic Emission Signals in Structural Interfaces
Authors: Wang Xiang Hong , Hu Hong Wei , Zhang Zhi Yong
Published: September 2012

Received acoustic emission (AE) signals are transmitted across structural interfaces in many real-world applications. This paper studies attenuation of the signals across two common structural interfaces. The experimental results indicate that interface has effects on attenuation, which depends on the relative scales of structures. Signal energy is strengthened due to multiple flections of signals on the small-size structure when an interface is constructed by different scales. Thus the received signals are distorted worse than the original signals. So it is a better way to mount sensors on a simple structure with a size as much as a structure incurred AE sources.
An Analysis of Unloading for Mechanical Press
Authors: Li Chang Long , He Qing , Zhang Zhi Gang , Zhang Qin He , Zhang Jian Hua
Published: September 2012

In order to analyze the advanced unloading problem of the large-scale press machine under nominal pressure, a straight side four point press of 8000kN has been taken for example. The model of the connector is constructed in Abaqus and the stiffness of the connector has been analyzed. The dynamic model of press machine impacting mechanism is constructed in ADAMS and the constraints is added into the model, meanwhile, the simulation model of the hydraulic protective system of the mechanical press is constructed in AMESim. Finally, the combined simulation of the hydraulic and mechanical system is realized, thus the actual stamping process of mechanical press is accurately simulated. The conclusion shows that the improper pre-pressure selection is the main reason for the unloading problem. And the correct pre-pressure value is obtained.
An Improved Parameter Estimation Method for Three-Parameter Weibull Distribution in the Life Analysis of Rolling Bearing
Authors: Yin Feng Long , Wang Ya Shun , Zhang Chun Hua , Zhang Xiang Po
Published: September 2012

Three-parameter Weibull distribution is playing a more and more important role in the reliability analysis of mechanical products. It can provide higher accuracy and better reflection of reliability in operating situation concerning fitting and parameter estimation for the rolling bearing life data. This paper focuses on the theory derivation of the maximum likelihood estimation of the three-parameter Weibull distribution, puts forward an improved method for the model parameter estimation and draws the life distribution model. Following that, the method has been proved to be correct and accurate by practical examples.The proposed method can provide a more accurate estimate way for the life analysis of rolling bearing based on three-parameter Weibull distribution.
Bionic Concave Pit-Like Metal Surface and Soil Direct Shear Test
Authors: Tang Ya Ming , Tian Yang
Published: September 2012

In order to test the reducing adhesion and resistance effect of bionic metal non-smooth surface, the direct shear test is experimented on a kind of bionic dredging tools with typical soil and bionic concave pit-like metal surface.The relation of shear force and shear displacement on a certain pressure is presented. The result will help to design the structure of cutting soil tools’ surfaces with less adhesion and resistance.
Disassembly Analysis Based on Entropy and Extension Theory
Authors: Zhao Na , Mu Rui , Huang Wei , Lin Wen Guang
Published: September 2012

In view of the fuzziness and uncertainty characteristics of the index and evaluation incompatibility in the disassembly evaluation process, the disassembly evaluation model of fuzzy matter-element analysis based on entropy was proposed. Firstly, the fuzzy matter-element matrix and weight matrix was established, based on the analysis of the factors having influences on disassemblability. Then the dependent degree of each scheme was calculated to rank disassemblability of the product design schemes. Additionally, the index weight was determined by the method of entropy, which can effectively avoid interference of subjective factors in the process of weight determination. Finally, an example of disassemblability evaluation was given to show the effectiveness of the method.
The Study of Design and Installation Process for Supersonic Nozzle
Authors: Wu Lian Sheng , Li Guang Li , Fu Qi
Published: September 2012

A practical optimal design method of supersonic nozzle is proposed for a supersonic wind tunnel’s design. Design a set of nozzle wall lines with the same nozzle length and different Mach numbers 1.5, 2.0, 2.5. Use numerical simulation method for the verify and analysis of the designed nozzle. Mainly study the impact of the installation gradient between nozzle and test section on flow field quality. This wind tunnel is the subsonic, transonic and supersonic wind tunnel and its test section cross is 0.2 m × 0.2 m .The impact on flow field quality of the test section was studied quantitatively by using the numerical simulation method. The installation gradient index was given. It has some practical value to the construction of supersonic wind tunnel. At present, this study has been applied in construction of the wind tunnel. The gradient of the test section import shall not be greater than 0.5 mm.
Modeling and Experimental Verification of a Hybrid Energy Harvester Using Piezoelectric and Electromagnetic Technologies
Authors: Xu Zhen Long , Wang Xiao Xi , Shan Xiao Biao , Xie Tao
Published: September 2012

This paper presents a hybrid energy harvester using piezoelectric (PZT) and electromagnetic (EM) technologies. A mathematical model of the output power for this generator was developed. Experiments were carried out to verify the numerical analysis. The theoretical results were in good agreement with the experimental results. The experimental results showed that the maximum output power of the separate PZT and EM energy harvesters were 0.667 mW and 0.32 mW, while that of the hybrid harvester was 0.845 mW under the vibration acceleration of 9.8 m/s2 at 66 Hz. It shows that the hybrid energy harvester can effectively increase the output power.
Research on the Hydraulic Actuator Control of the Quadruped Robot Based Dual-Loop
Authors: Yang En Chao , Wei Qing , Cai Run Bin , Ma Hong Xu
Published: September 2012

This paper presents modeling and dual-loop control of a non-linear hydraulic actuator applied on the quadruped robot. The pure position control of the actuator is hard to achieve because it’s a three-order system. So we propose the dual-loop control method to decompose it. The controller structure of the system is composed of two loops namely outer position control loop and inner force control loop. Outer loop controller is used to calculate the optimum target force to reject the errors of the position control, while, the inner loop controller is used to keep the actual force close to this desired force.
Strength Calculation Analysis of Diesel Engine Linkage Based on Contact Finite Element Method and Experimental Study
Authors: Wang Gui Xin , Guo Li Jun , Sun Wen Fu , Ma Jun Yan
Published: September 2012

Adopting the contact finite element method, with complex connecting rod group assembled body model of computation, the fatigue strength of the connecting rod of a certain type of diesel engine was verified. A transient stress analysis was conducted on the connecting rod. Compared with the connecting rod static stretching and compression test, the contact finite element method, which was used to analyze the strength of the connecting rod subassembly, was feasible. Based on the contact finite element method, the connecting rod transient stress analysis results showed that the maximum stress of the connecting rod did not occur under the highest pressure of the cylinder, and the dynamic stress value was greater than the static stress value.
Research on Measure Method of Common Normal Length Variation of Bilateral Modification Gear
Authors: Wei Yu Lan , Yan Qi Bo , Li Bing , Xu Hao , Fan Ying Ying
Published: September 2012

In the conditions of rationally selecting of the measure tooth number, this paper puts forward a new method to calculate the common normal length variation, which is based on coordinate measurement machine to collect the data of bilateral modification gear's outline. Firstly, the addendum modification coefficient and tangential modification coefficient are used to determine the optimum measure tooth number, and then the common normal length variation is determined according to the definition. The experiment has shown that this way has a lot of advantages, such as the intensive data of sample points, less human intervention and high measurement accuracy.
Zero-Inflated Poisson Model with Group Data
Authors: Yang Jun , Zhang Xin
Published: September 2012

The Zero-inflated Poisson model has been widely used in many fields for count data with excessive zeroes. In fact, group data are often collected for many count data, such as cigarette consumption. In order to solve the problem, Zero-inflated Poisson model with group data is investigated in this paper. Parameter estimation is given by the maximum likelihood estimate, model selection is discussed by the Chi-square test, and one real example is given for application in the end.
AC Position Servo System Controller of Aircraft Simulator Based on Genetic Algorithm Optimization
Authors: Liu Bao Long , Zheng Xiu Lin , Li Xiao Qi
Published: September 2012

This paper analyzes nonlinear and uncertainties factors caused by the friction and clearance of ac servo system. a Fuzzy-PID controller based on Genetic Algorithm was designed. Adjust the three parameters of PID controller based on the error and error change rate ; Adjust the various parameters of the fuzzy-PID controller using genetic algorithm optimization; This method has better control effect on the AC of Meter systems than traditional PID controller. And both dynamic and steady performances were improved evidently
Application of Hilbert Marginal Spectrum to Coal-Rock Interface Recognition
Authors: Wang Bao Ping , Wang Zeng Cai , Wang Yong Juan
Published: September 2012

In this paper, a new method based on Hilbert marginal spectrum is presented to solve the problem of coal-rock interface recognition in the top caving process. Coal or waste rock impinges against the tail beam of the hydraulic support. The impact causes the vibration of the tail beam. Because of different intrinsic characteristics, dissimilarities will exist between the two cases. The coal-rock interface is recognized by comparing the Hilbert marginal spectrum. The results show that the proposed method is a promising approach to identifying the coal-rock interface.
Resource Allocation Mechanism of Cloud Services in Logistic
Authors: Ma Dong Jun
Published: September 2012

Cloud computing has become the essential computer system in internet, but in how to use cloud computing to serve the information transfer in logistics and supply chain in order to enhance the efficiency of management is still an emerging research topic. This study explore the concept of cloud services and cloud computing operations in logistic issue of China, the status quo, and to analyze resources demand, operating environment, means of support and management services in the logistics process. Finally, according to these requirements, we discus the resource distribute mechanism which can enhance the use of cloud services capabilities and better improve the efficiency of logistics operations.
Research on the Design of Electromechanical Product Based on Interaction
Authors: Niu Dong Fang , Xie Li Yang , Shao Teng
Published: September 2012

The informatization of manufacturing industry brings new requirements to the industrial design of electromechanical products with high degree of automation and high intelligence. One of the central design concerns is to guarantee reliability of the interactions between the operators and the products working in non-transparent conditions, and at the same time to provide pleasant user experience. Starting from the user’s behavior patterns and psychological needs, the paper analyzed human-machine interaction system of electromechanical products and the design principles of its constituent, and the suitability of the interactive environment of electromechanical products was provided.
The Calculation of Fractal Model’s Non-Scale Range
Authors: Yan Xu Jiu , Xue Lin Fu , Li Wen Qing
Published: September 2012

Application of fractal method to establish geological data fractal model is an important way to identify geological anomaly. Using derivative identification method, it can divide the fractal model’s non-scale range respectively. It determines the abnormal areas according to the abnormal lower limit value. In this paper, the geological data of Au element is calculated by "C-A" fractal model in Mohe Heilongjiang province. On the same non-scale range the double logarithmic fitting curve has the similar local slope and the second-order derivative of this curve within the same non-scale range could be slightly fluctuate near zero. Using the threshold , the non-scale ranges can be identified by this method. The abnormal lower limit value identified by this method is lesser than the artificial recognition method. On the Matlab software platform to calculate Au abnormal areas’ dimension value is 2.65, and the element abnormal lower limit value is 2.9. The abnormal areas delineated by this abnormal lower limit value contain all the gold ore sites we have known.
Design of Tape Wound Composite Cylindrical Shells Incorporating Different Failure Criteria and Winding Kinematics
Authors: Rahman Hammad , Jamshed Rehan , Khan Aurangzeb , Ijaz Hassan , Min Li
Published: September 2012

Internally pressurized tape wound composite shells of revolution with plugged ends are immensely utilize in commercial and aerospace applications. The focus of present endeavor is the realistic design of composite shells. A balanced symmetric stacking sequence of glass/epoxy has been considered. Its mechanical properties are determined from the experimental testing of flat plate samples as per ASTM standards. Netting analysis is then performed to find out the winding angles and hoop/helical layers contribution for optimum structural performance and higher efficiencies. The winding kinematics has been comprehended from the developed surface of the composite cylindrical shell and it has elucidated that each helical layer results from the interlacing of two plies with alternate angles of + θ and θ to the shell meridian. These helically interlaced layers are responsible for the creation of triangular shaped flip flop patterns which run both across the circumference as well as along the shell meridian. These characteristic patterns of helical winding known as mosaic patterns are not generally incorporated in the design calculations which are normally based on mechanics of composite laminates. Their pronounce effect in altering the transverse fiber stress is presented in the present study. The influence of mosaics in the presence of hoop layers is targeted for the first time hence the laminate that has been analyzed comprise of both hoop layers and helical layers with mosaic patterns. A software code has been developed in MATLAB using classical laminate plate theory (CLPT) incorporated with different failure criteria. Range of burst pressures based on different failure criteria has been plotted. Results of MATLAB code and FEA based ANSYS software, are in close agreement.
Fatigue Crack Growth Behaviour of AISI 50100 Precipitation Hardened Steel after Welding
Authors: Sultan Amir , Pasha Riffat Asim , Ur Rehman Shah Sayyid Masood , Ali Haris , Zulfiqar Asim
Published: September 2012

Single-edged notched tension (SENT) specimen is used to study the fatigue crack growth rate (FCGR) behavior of AISI 50100 steel using MTS 810. Calibration tests are run to get plots of crack mouth opening displacement (CMOD) vs. Load and CMOD vs. Crack length to width ratio with the known crack lengths. FCGR of welded and un-welded specimens are plotted against stress intensity range to show the effect of welding on fatigue crack growth rate of AISI 50100 steel, initial results of the experimentation are presented.
Random Lasing Emission Form Granular-Surface PS/PMMA Blend Films
Authors: Zhao Xuan Ke
Published: September 2012

The random lasing emission from granular-surface PS:PMMA:Alq3:DCJTB blend films was investigated. By micro-phase separation of PS:PMMA:Alq3:DCJTB blend in spin-coating and solvent evaporation process, we obtained a granular-surface waveguide film with gain on glass substrates, whose period is about 200~500nm, and fluctuation is about 20nm. Pumped by THG YAG laser, a significant random laser emission was observed. Compared with the samples of glass/PMMA:Alq3:DCJTB and glass/ PS:Alq3:DCJTB prepared under the same conditions, the laser threshold decreased about 5 times, the line width at half (FWHM) reduced to 1.7nm from more than ten nm, and the quality factor of laser peak increased 7-9 times.
Analysis on the Scattering Characteristics of Two Stray Light Removing Metal Surfaces
Authors: Chen Jian Jun , Ma Zhen , Duan Xue Ting , Liu Qiong , Han Juan , Fu Xing
Published: September 2012

For the purpose of stray light suppression, black anodized and sandblasted aluminum alloy is widespread used in spaceborne cameras. Base on the relative measuring method, in the white light irradiation, measure relative backscatter intensity and BRDF of two black anodized and sandblasted sample surfaces. Contrast these surfaces scattering characteristics. Finally BRDF curves have been drawn with measurement data. In the curves, the BRDF of sandblasted aluminum surface is nearly linear relation. Anodized surface curve, it’s pulse pattern that BRDF sharply increases among the region of critical angles. It is indicate that in critical angle range, anodized aluminum surface specularity is visible and can be treated as specular reflection which harm for stray light suppression. This experiment research can provide objective reference of these two material’s scattering characteristics in specific optical system design.
The Investigation of Metamaterials by Measuring the Power of Transmission in the Terahertz Regime
Authors: Luo Jun , Chen Ying , Kang Sheng Wu , Zhang Xin Yu , Xie Chang Sheng , Zhang Tian Xu
Published: September 2012

We present the design and fabrication of metamaterials, and investigated the power transmission properties of the metamaterials in the frequency ranging from 1.04THz to 4.25THz. The measured results reveal a global maximum transmission peak at 2.52THz. We compared measured power transmission performances of four types of metamaterials microstructures, and analyzed their transmission differences.
Study on TE011 Mode’s Resonant Characteristic of Complicated Microwave Cavity with Ceramics Layer in Rubidium Frequency Standard
Authors: Li Xiao Xiao , Cao Bin Zhao
Published: September 2012

Complicated microwave cavity loaded with ceramics is first investigated by mode matching method in rubidium frequency standard. In order to study main factors influencing resonant characteristics, resonant frequencies of TE011 mode are calculated and compared with commercial software (CST) results. The results show good agreement between theoretical computations and CST simulations. This work is of great significance for cavity design and theory perfection in atomic frequency standard.
GaN Layer Grown by Hydride Vapor Phase Epitaxy: Influence of the Reactor Pressure
Authors: Xie Xin Jian , Hao Qiu Yan , Liang Li Min , Li Yin Ying , Liu Cai Chi
Published: September 2012

In this paper, the influence of reactor pressure on the quality of GaN epilayer grown by Hydride vapor phase epitaxy (HVPE) is reported. A series of sample was fabricated at 0.2, 0.5, 0.7 and 1 atm. There were several samples at certain pressure in order to avoid the random affection. And the root mean square (RMS) is introduced to determine the repeatability. The rocking curve and photoluminescence spectrum are used to evaluate the quality of the grown epilayer. The reactor pressure has affection on the quality of GaN epilayer. Low reactor pressure is helpful to improving the quality of crystal structure.
Preparation and Characterization of Composite Polymer Electrolyte
Authors: Wang Wei Min
Published: September 2012

Composite polymer electrolyte materials are widely used in the electrochromic glass, rechargeable lithium-ion batteries, supercapacitors, and other fields, all solid-state electrolyte to overcome the problems of the conventional liquid electrolyte rheology, chemical stability and security, applications and rangewill continue to expand. The room temperature conductivity of composite electrolytes should be improved, the need to conduct groundbreaking research in the preparation process of the composite electrolyte materials, structure and properties, there are many problems. The composite polymer electrolyte materials has become an intersection of many disciplines including materials science, chemistry, physics, and the content may lead to the field of new energy materials, in particular, is a new technological revolution in the field of battery materials, which study of the problem will continue and in-depth.
Forbidden Band Broadening of Photonic Crystal for Wide Waveband Infrared Stealth
Authors: Zhao Jian Gang , Zhao Xuan Ke , Wang Lian Fen , Zuo Xiang
Published: September 2012

In order to achieve 1~14μm infrared stealth, the forbidden band of photonic crystal (PC) must be broaden. In this paper, we systematically studied several parameters affect the forbidden bandwidth of PC, such as refractive index ratio, thickness and periodic number of two medium layers. Numeric calculation results show that the forbidden bandwidth increases with the refractive index ratio of two medium layers, and it no longer increases when the refractive index ratio is greater than six; the forbidden bandwidth comes largest when the optical thickness of two medium layers is equal to one quarter of center wavelength respectively; and the periodic number has little influence on the bandwidth. Based on these, we chose PbTe and MgF2 to design a compound PC by four photonic crystals whose center wavelengths are at 10.6μm, 4.8μm, 2.5μm and 1.06μm respectively, and obtained nearly 100% reflectance in 1~18μm waveband, which would well meet the demand of the all-infrared waveband stealth.
Study on Experimental Preparation of SS-O Solar Spectrum Selective Absorbing Coating
Authors: Liu Han Wu , Wu Ke
Published: September 2012

It is practically significant to develop a kind of selective absorbing coating with excellent performance and usability for flat-plate solar collector, and to work out the related preparation craft. In this article, the Cu-based SS-O solar spectrum flat-plate selective absorption coating system was prepared by the method of direct current reactive sputtering coating films, in which, two layers are SS-O absorbing layer and one is Si-O anti-reflection layer. The reflectance spectra of the absorption coating system was measured by UV3600 spectrophotometer, the reflectance and absorptance of the absorption layer and the anti-reflection layer were calculated, and certain experimental tests were conducted on the prepared absorption coating system in terms of the salt spray resistance performances. The results show that the SS-O selective absorption coating which was prepared by magnetron sputtering technique possesses excellent corrosion resistance, whose absorption rate and the emission ratio have reached the level of the German blue tape series. It can meet the domestic demand for high-level flat-plate market.
Generation of Multi-Atom W States in Microtoroidal Cavity-Atom System
Authors: Huang Yan Tang , Ou Ling , Huang Yu
Published: September 2012

We proposed a scheme for the generation of multi–atom W states with two-photon Jaynes-Cummings Model in ultrahigh-Q toroidal microcavities. We consider that the two modes, clockwise (CW) and counterclockwise (CCW) modes inside the microtoroidal resonator, can be produced by embedding Bragg grating in the microtoroidal.
Study on Ameliorating the SCG-LDPC Code for High-Speed Optical Communication Systems
Authors: Yuan Jian Guo , Tong Qing Zhen , Xu Liang
Published: September 2012

A novel ameliorated construction method of low density parity check(LDPC) codes, based on the construction method of Systematically Constructed Gallager(SCG) (4,k) code, is proposed. This method, compared with the construction method of SCG(4,k) code ameliorated before, has some advantages such as saving storage space and reducing computation complexity in the hardware realization. And a novel SCG-LDPC(3969,3720) code with the same 93.7% code-rate as classic RS(255,239) code and LDPC(32640,30592) code in ITU-T G.975.1 recommendation is constructed by the proposed method. The simulation analysis results show that this novel SCG-LDPC(3969,3720) code has better error-correction performance and lower decoding complexity than those of a classic RS(255,239) code and LDPC(32640,30592) code. Therefore, the SCG-LDPC(3969,3720) code can be better suitable for high-speed optical communication systems.
Measurement and Analysis of near Infrared Spectrum of Gasoline Vapor
Authors: Yan Li Ping , Li Shu , Luo Lai Gen , Zhang Min , Dong Jing Xin
Published: September 2012

In the fiber-sensing gas detection system, characteristic of near infrared absorption spectrum of the detected gas is greatly significant. The volatilized gasoline vapor is a mixture rich in various components, of which near infrared absorption spectrum shall be determined by means of experimental measurement. In this paper, an experimental platform is constructed by analyzing absorption characteristic of liquid composition in gasoline within the range of near infrared spectrum, which achieves measurement of the volatilized gasoline vapor with different concentration. In addition, reliability of this measurement method is inspected, a comparison between features of absorption spectrograms of liquid and gas is made, and linear relation of absorbance and concentration of gasoline vapor is verified. The result shows that the experimental data is acceptable and may be used as the basis of further analysis and for design of the online detecting system of gasoline vapor concentration in the hazardous environment.
A 5-Port Photonic Lantern for Light Beam Combining
Authors: Yan Qi , Yu Hai Jiao , Tian Feng Jun , Sun Wei Min
Published: September 2012

We demonstrate a 5 port photonic lantern for light beam combining. This is a potential key component for low-cost wideband light source. The photonic lantern is a fused-taper fiber device with 5 energy delivery optical fibers into a multi-mode fiber. The input fibers have Ge-doped core diameter of 110μm and the output multimode fiber has a core diameter of 30μm. In the tapered section light in different fibers couples with each other and the multimode fiber terminal output all wavelengths of the light from 5 LED sources which be used to test the device. Different broadband sources can be obtained by using photonic lantern and different combination of LED sources. This paper shows the feasibility of using the photonic lantern to obtain wide-band light source by narrow bandwidth light sources.
Electrochemical Properties of Nitrogen-Enriched Templated Microporous Carbons in Different Aqueous Electrolytes
Authors: Tian Xiao Ning , Zhang Li Li , Jiang Zhong Qing , Luo Li Juan
Published: September 2012

Ordered microporous carbon materials with controlled chemical and physical properties were synthesized by one-step nanocasting process using different carbon precursors. Large amount of heteroatoms, particularly oxygen and nitrogen species were presented in the carbon matrix. The interactions between the electrolyte ions and the surface functionalities were investigated in detail under various electrolyte environments. The electrochemical studies have revealed that different pseudo-processes occurred in proton-rich and proton-free electrolyte solutions. In proton-rich electrolyte environment, the faradaic processes are mainly due to the proton exchange between the nitrogen and oxygen species on the carbon electrode with the electrolyte. On the other hand, in proton-free electrolytes, nitrogen species was shown to play very important role in terms of the adsorption/desorption of K+ ions when negatively polarized in K+ containing electrolytes. The faradaic interaction between K+ ions and the nitrogen functionalities are stronger at the more negative potential. Very high gravimetric capacitance of 452 F/g and large capacitance retention of 97% at high discharge rate was achieved by the nitrogen-enriched carbon with moderately developed surface area. The superior capacitive performances of the templated carbons are closely linked to the ordered hierarchical porous structure, the adequate microporosity as well as the presence of suitable surface functionalities.
Dynamically Manipulating Beam with Metallic Nano-Optic Lens Containing Liquid Crystal
Authors: Wang Ji Cheng , Zhou Xia , Gao Jie , Xu Zhe Tao , Sun Lin , Jin Xiao
Published: September 2012

A set of metallic nano-optic lens with liquid crystal material embedded in the slits is proposed as a new idea of dynamically manipulating beam. Three kinds of metallic nano-optic lens can achieve the functions of beam deflecting, beam splitting and beam focusing respectively. The deflection angle, splitting angle and focus length can be controlled by external electrical field easily. The three phenomena are based on the principal that changing the external electrical field can control the phase of the waveguide mode in the slits.