bluuebunny/crossref_metadata_2025 huggingface dataset:
Solution of Mackling Rails Detection Using Testing
Authors: Yang Hai Kui , Wang Yi Ming , Wu Shu Qin , Zhao Ming Ming
Published: March 2013

The study of the thesis is based on advanced vibration testing and pressure testing equipment; we can get accuracy test data including shaft vibration, radial vibration, and the pressure of printing and other parameters. Mackling Rails quantitative is descripted by self-made module, combined with the test data of the mechanical parameters; I establish corresponding relationship between Mackling Rails and dynamic characteristic parameters of printing machinery, which provide a method to get rid of relying solely on experience. It makes Mackling Rails detection more convenient and reliable. Solutions introduced in the thesis also apply to other fault of the press.
Evaluation of Fracture Toughness of Structural Ceramic by Instrumented Indentation
Authors: Song Zhong Kang , Ma De Jun , Chen Wei , Guo Jun Hong
Published: March 2013

Fracture toughness of structural ceramic materials can be obtained with one instrumented macro-indentation tester with a Vickers indenter, which is superior to the traditional method which first uses a nanoindentation tester or other instruments to get elastic modulus and then use a large load hardness tester to make crack on the sample surface. Fracture toughness of two ceramic materials: silicon nitride and zirconium oxide is tested on the instrumented macro-indentation tester. The results are 5.93 ~7.05MPam1/2and 7.68~8.57 MPam1/2.
Research on Measurement System of Print Image on Line
Authors: Sun Yu Qiu , Chen Hong , Sun Jian Xin , Cai Ji Fei
Published: March 2013

It be discussed that influence factor and expression ways about print image quality. Density and chroma be used to express image shade and color information for responses print press ink mate and image quality. Image light and shade and color are expressed by ink quantity on print paper in Color print product. The paper discuss print image quantity influence factor and ways expression of quantity about print production, image density and color factor express print image light and shade thereby press ink quantity supply was feedback. CCD-Charge-coupled Device is a kind of semiconductor parts for exploration light distributing. It would catch video frequency for that image formation was better obtained in print product, by image transact soft ware transform light electricity signal into reciprocal image density ,color factor , dot expands superimposition state parameter. For print image in press high speed moving, it is important that speediness exact measure and supervising control image quality. CCD sensor could satisfy dynamic image measurement need. Certainly face CCD could obtain the largest all-around image information, it obtain the more speeding color print image light and shade and color information. CCD sensor measurement system transform software base on print image quality diagnostic density and chroma transform way to charge measure signal into print calling quality expressing way, to come true print quality supervising control.
Distributed Optical Fiber in High RCC Arch Dam Project
Authors: Cai De Suo , Tang Hao , Guo Ye Shui
Published: March 2013

As the highest RCC(Roller Compacted Concrete) arch dam under construction around the world, Wanjiakouzi adopted advanced distributed temperature system (DTS). This paper summarizes the network design, technical requirements as well as the protection precautions of fiber connector and monitoring port of temperature measurement system of optical fiber in high RCC arch dam in Wanjiakouzi. It can be indicated that the accuracy and reliability of DTS by comparing fiber optic temperature values with the conventional thermometer measured values. The analysis and monitoring results show that the temperature measurement system of optical fiber can truly monitor and reflect the change process of heat of hydration of RCC, gradation and the cooling water pipe to temperature.
Design of Automobile Driving Trainer Simulated Gearbox
Authors: Luo Su Jun , Zhang Xue Ling , Chai Shu Feng
Published: March 2013

According to the work principle of the automobile manual gearbox, the author has designed a new type of automobile driving trainer simulated gearbox. The principle of the simulation of various organization compositions of gearbox and the simulation of the feeling to the real organization function and the operation dynamics are introduced, and the practical application effect of the simulated gearbox has been summarized at last.
Optimization Design of Heterogeneous Metal Sandwich Plate Using Response Surface Method
Authors: Wang Yi Qing , Sun Kun , Kuang Xin Bin , Guo Shan Guang , Tian Xiao Geng
Published: March 2013

Heterogeneous metal sandwich plate is composed of high strength material face-sheets and low-density material core. In this paper, the crashworthiness property of the heterogeneous metal sandwich plate was investigated with combining the response surface method and finite element simulation. The specific absorption energy of sandwich plate is made as the crashworthiness performance index, and approximation written as a third-order function of the section parameters by means of the response surface method. According to the BB experiment design method, 29 groups of sandwich plate with different section structure parameters were selected and finite element numerical simulations were conducted to study on deformation behavior of sandwich plates during the collision process. Then, the coefficients of approximate specific absorption energy function were solved with regressive analysis. Consequently, the relationship between the crashworthiness performances of sandwich plate and the section parameters α, β, D, d was obtained.
Control and Regulation of Following Pressure Regulating Device in Offset Press
Authors: Guo Jun Zhong , Cai Tian Tian , Zhao Shi Ying
Published: March 2013

In this paper, the single and double eccentric combination of pressure regulation device in the offset press was as the object. A closed loop control system of printing pressure and a following pressure regulation device were designed. The rotation angle of eccentric bearing in plate cylinder and the length change of regulating screw were worked out by means of the vector relationship of pressure regulation. The influence on printing quality from the pressure regulation device was analyzed, and it provided a certain basis for the regulation and control of printing pressure.
Analysis of Platen Die-Cutting Mechanism Based on the Axiomatic Design Theory
Authors: Shi Xiang Dong , Li Yan , Li Hao Dong
Published: March 2013

In this paper, the basic theory of Axiomatic Design is introduced at first. Then the design process of the platen die-cutting mechanism is analyzed based on the basic concept and design process of axiomatic design. The functional requirements of the die-cutting mechanism, and the mapping and decomposition processes between designing parameters were presented. This provides the scientific basis for evaluating the rationality of the mechanism design, and plays a guiding role on design.
Research on Cooperation Mechanism of Multiple Expert Systems for Oil-Gas Reservoir Protection Based on Agent
Authors: Yang Li , Liao Hao De
Published: March 2013

To solve collaboration problem in intelligent agents, a new cooperation mechanism is used in multi-expert system.Firstly,by introducing five-tuple with constraint condition,a new agent task decomposition model is presented.Secondly, blackboard mechanism based on point-to point is analyzed to solve communication among agents. The application of the expert system shows that our proposed task decompostion model is valid and blackboard mechanism based on point-to point can be used as communication among agents.Finally, minimum-cost-based cooperation mechanism based on agents can effectively solve the collaboration of experts in the multiple expert systems and improve the accuracy of inference.
Identification and Biological Characteristics of Strawberry Root Rot Pathogen
Authors: Fan Wen Zhong
Published: March 2013

By research on strawberry root rot germ in several bases of Jilin province, cleared that the pathogen of strawberry root rot mainly were F. oxysporum and Rhizoctonia solani Kuhn, the growth of F. oxysporum was the best when took sucrose as C source, and the growth of Rhizoctonia solani Kuhn was the best when took starch as C source. KNO3 was the most appropriate N source to their growth. The effect of light on F. oxysporum was not great, but on Rhizoctonia solani Kuhn was great, the growth of mycelium was the fastest under alternating light and dark conditions, and had inhibition under full light conditions. Acidic conditions were suitable for mycelium growth of F. oxysporum, and the growth speed of both pathogens was the highest when PH was 6.
Study of Impact of Material on Three-Dimensional Design
Authors: Jiang Xue
Published: March 2013

As a basic material element of the three-dimensional shape of the material plays an important role in the three-dimensional shape, material determines the structure of the three-dimensional shape, texture, texture, color, and other psychological performance, as well as a means of processing, technology, connection, and connection strength. Characteristics of the texture of the material itself, the volume characteristics, and it may produce structural organizational characteristics have a direct impact on the shape.
Al Transmittance Estimator for Multi-Layer Coating TP Film
Authors: Chen Yu Ju , Chien Jui Chen , Chang Chuo Yean , Wang Shu Ming T. , Chiang Yu Chen , Hwang Rey Chue
Published: March 2013

This research aims to develop an artificial intelligence (AI) estimator for the coating touch panel (TP) film. The AI estimator could estimate the transmittance of touch panel (TP) with different layers coating. It also could be used for helping the technician precisely set the relevant control parameters of evaporator in advance so that the optical quality of TP film could fit the customers request. In order to catch the unknown relationship between the films transmittance and its all possible influencing factors, the neural network (NN) is taken as the AI tool. In other words, a fast and precise intelligent manufacturing mechanism for TP evaporation process is expected to be developed and this intelligent mechanism could be practically used in the real industrial applications.
The Research of the Stress Test Technology on Bridge Type Grab Ship Unloader
Authors: He Cheng Zhong , Liu Han Dong
Published: March 2013

The safety performance of bridge type grab ship unloaders are the main factors in the normal operation of a bulk cargo wharf. This article made a research of the stress test technology on the use of safety assessment on the structure of the bridge type grab ship unloader, through the dynamic stress test of ship unloader key parts of the structure under the use of the condition, analysis bridge type grab ship unloader safety performance is at ordinary times and maintenance and inspection needs to focus on the dangerous site.Stress test shows that the Maximum compressive stress is Point 7, its maximum dynamic compressive stress is 82.5MPa; while the maximum tensile stress occurs at point 11, its maximum dynamic tensile stress of 72.5MPa. After 17 years used, The force main parts (except former trolleys) of the ship unloader are basically the same as its design value.
Design Modification Investigation of a Concept Heat Exchanger for Better Efficiency through Thermal Simulation
Authors: Ahmed Tousif , Abrar Md. Abu , Amin Md. Tanjin
Published: March 2013

Thermal flow simulation can be used to study the fluid flow and heat transfer for a wide variety of engineering equipment. Flow simulations with the advent of computer architectures with superfast processing capabilities are rapidly emerging as an attractive alternative to conventional thermal flow analysis which is either too restrictive or expensive. In thermodynamic applications, increase of thermal efficiency of heat exchangers (i.e. radiators, cooling towers, condensers, intercoolers) is essential for compact design and improving whole cycle efficiency thus improving economic viability of the system. This paper outlines the process taken to optimize the geometry of conventional heat exchanger. Models were drawn into Solidworks and a computational domain was created. Solidworks Thermal Simulation was used to iterate toward a converged solution with the goal of obtaining a better efficiency of the heat exchanger. The results are analyzed and compared between two differently designed heat exchangers to find out the improvements. These practices were detailed in hopes that further research would use the ground work laid out in this paper to redesign existing heat exchangers.
Modeling and Simulation of Mass Flow Measurement Process by TDLAS
Authors: Zhou Xin , Wang Guang Yu , Qu Dong Sheng
Published: March 2013

Based on the mass flow measurement by tunable diode laser absorption spectroscopy (TDLAS), the process of air flow measurement was modeled and simulated. Using the Gridgen software, we drew the model inlet grid. And we used fluid calculation program to calculate gas condition in the inlet model. Under the set conditions, we got the mass flow of the model. Compared the mass flow which is measured by the TDLAS technology with the calculated data, we can obtain the measurement accuracy of TDLAS.
Numerical Simulation on Thermally Driven Heat Transfer in Several Small-Size Circular Channels in Gravitation Field
Authors: Xia Jie , Chang Hai Ping , Tang Hou Xiang
Published: March 2013

In this paper, numerical simulation was performed to comparatively research the thermally driven heat transfer phenomenon of the four kinds of small-size circular channels in the gravitational field. Four kinds of the channels were headed at one end and cooled at the other. At the same time, the thermal drive of fluid was used to accomplish the heat transfer in a high body-force field. The research results indicate that four kinds of circular channels have the same thermally driven heat transfer rule. Furthermore, the thermally driven heat transfer power can be enhanced with the addition of the circular channels. Therefore, when we utilize micro-cyclic channels to cool turbo-vanes, the adoption of multi-cyclic channel may be a feasible design because the adaptability of fluid can be utilized to enhance the heat transfer.
Cooperative Multi-Robot Object Tracking in Unknown Environment Using Covariance Intersection
Authors: Wu Ming , Li Lin Lin , Hua Wei Zhen
Published: March 2013

This work presents a approach for multiple cooperating mobile robots for moving object tracking in unknown environment. Each robot in the team uses the full covariance extend Kalman filter based algorithm to simultaneously localize the robot and target while building a landmark feature map of the surrounding environment. Meanwhile, in local robot system the covariance intersection based data fusion method is used to fuse information sent by the other robot teammates, those information may contains the location of target and the location of robot itself from other teammate’s point of view. The method is distributed, and let the multi-robot system have the ability of robustness. The results of simulation validate a higher accuracy of our method compared with non-fusion single robot solution.
Study of the Gas Sensor Array Based on Micro-Machined Ceramic Hotplate
Authors: Xue Yan Bing , Tang Zhe Nan
Published: March 2013

In order to improve the thermal stability of silicon micro hotplate, a ceramic hotplate with structure of suspending bridge was designed. The steady-state thermal response of the hotplate and the structure of the micro-heater were simulated by using the finite element method. By using conventional microelectronics technology and laser micro processing technology, the microstructures with thickness of 100 μm and bridge width of 2 mm were produced. The test results show that the ceramic hotplate has higher working temperature than traditional silicon hotplate, and it can be worked steadily at the average temperature of 630 °C on 1.5W heating power. Taking ceramic hotplate as heating platform and nano-SnO2 materials with Pd doping concentration of 0.2 at.% and 10 at.% as sensitive materials respectively, the array with two gas sensors was designed and fabricated. The gas sensor array can be used to detect single gas of CO or CH4 with high sensitivity and good selectivity when it works with constant heating voltage. When the sensor array works with periodic voltage heating pulse, it can realize quantitative detection for mixed gases of CO and CH4.
Monitoring Power Station Boilers Using ANN and Image Processing
Authors: Sujatha K. , Pappa N. , Kumar K. Senthil , Nambi U. Siddharth
Published: March 2013

This project deals with the monitoring the combustion quality of the power station boilers using Artificial Intelligence for improvement in the combustion quality in the power station boiler. The colour of the flame indicates whether the combustion taking place is complete, partial or incomplete. When complete combustion takes place the flue gases released are within the permissible limits otherwise its level is high which is out of limit. By analyzing the flame color which is captured using infrared camera and displayed on CCTV the quality of combustion is estimated. If combustion is partial or incomplete the flue gases released will create air pollution. So this work includes enhancement in the quality of combustion, saving of energy as well as check on the pollution level. The features are extracted from the flame images such as average intensity, area, brightness and orientation are obtained after preprocessing. Three classes of images corresponding to different burning conditions are taken from continuous video. Further training, testing and validation with the data collected have been carried out and performance of the various intelligent algorithms is presented.
Novel Approach to Robust Stability Criteria of Uncertain System with Time-Varying Delay
Authors: Deng Chao , Xu Zhao Di , Bai Yu , Wang Xin Yuan
Published: March 2013

This paper considers the robust stability criteria of uncertain system with time-varying delay. Firstly, by exploiting a new Lyapunov function that optimizes the segment of time delay and using the convexity property and free-weight method of the Linear Matrix Inequality, delay-dependent stability condition can be obtained for the asymptotical stability of the nominal system. Secondly, basing on the obtained condition, the corresponding linear matrix inequality can be obtained for the uncertain system. Finally, an example is given to demostrate the effectiveness and the merit of the proposed method.
Function Synchronization of the Fractional-Order Chaotic System
Authors: Fan J.W. , Zhao N. , Gao Y. , Lan H.L.
Published: March 2013

Function synchronization is an important type of chaos synchronization because of enhancing the security of communication. In order to obtain the better conformances of function synchronization, a method of the fractional-order chaotic system is presented, which based on the stability theory of the fractional order system. This method need construct a parameter matrix and a coupled matrix using fractional-order chaotic drive system at first, and then the chaotic response system is set up with these matrixes. The synchronization error function between drive system and response system is satisfied with the asymptotic stability. Function synchronization of the fractional-order Rikitake chaotic system is selected as a typical example. Numerical simulation results demonstrate the validity of the presented method. This method not only has better synchronization conformances, but also can be applied in the chaotic secure communications.
Synchronous Control of Hyper-Chaotic System Based on Inverse-System Design
Authors: Gao Y. , Fan J.W. , Zhao N. , Yuan H.Y.
Published: March 2013

Hyper-chaotic synchronization can be applied in vast areas of physics and engineering science, and especially in secure communication. A hyper-chaotic synchronization method based on inverse-system theory is studied. The reversibility and relative degree of the synchronization error function are determined through Lie derivation calculation. A close-loop controller is obtained by synthesizing and designing a pseudo-linear feedback system, which used for estimating output variable synchronization error. Hype-chaotic synchronization of a four dimensional oscillatory system is selected as typical example and the simulation results demonstrate the validity of the method. The research results provide a useful reference for realizing hyper-chaotic synchronization.
Develop Monitoring System with Java Media Frame
Authors: Xu Jun Wu , Liang Jun Ling
Published: March 2013

This paper describes research in the use of The Java Media Framework (JMF) to develop Monitoring applications.. This paper introduces the structure of JMF library and describes the implementation of algorithms in our library. The Java Media Framework (JMF) is a recent API for Java dealing with real-time multimedia presentation and effects processing. JMF handles time-based media, media which changes with respect to time. Examples of this are video from a television source, audio from a raw-audio format file and animations.
Research on a Distributed Storage Application with HBase
Authors: Xu Jun Wu , Liang Jun Ling
Published: March 2013

This paper describes research in the use of HBase to develop storage applications.. This paper introduces the structure of HBase library and describes the implementation of algorithms in our library. HBase is a NoSQL database., A Bigtable is a sparse, distributed, persistent multi-dimensional sorted map. The map is indexed by a row key, column key, and a timestamp; each value in the map is an uninterpreted array of bytes.
Enhancement on CO2 Bubble Absorption in MDEA Solution by TiO2 Nanoparticles
Authors: Li Shu Hong , Ding Yi , Zhang Xiao Song
Published: March 2013

TiO2-N-methyldiethanolamine(MDEA)-H2O nanofluids were prepared by dispersing TiO2 nanoparticles in the 50wt% (mass fraction) MDEA solution. The stability of nanofluids was studied by the method of absorbance. Only with mechanical agitation, the nanofluids can keep stable at least 48 h without any dispersant. The surface tensions; kinematic viscosities and thermal conductivities of the MDEA solution were measured at the temperature of 20 °C when the TiO2 na-noparticles concentration was 0.05wt%, 0.2wt%, 0.4wt% and 0.8wt%. The results show that they all increase with increasing concentration of the nanoparticles. The maximum enhancement of the surface tension, kinematic viscosity and thermal conductivity is 0.6 %, 4.6 % and 5.9 % respectively at the concentration of 0.8 wt%. The influence of nanoparticles on CO2 bubble absorption in the MDEA solution was studied. It can be found that the CO2 absorption rate can be enhanced by 1.95%, 6.53%, 7.79%, 11.54% when the TiO2 nanoparticles concentration is 0.05wt%, 0.2wt%, 0.4wt% and 0.8wt% respectively. The possible mechanisms for the phenomena in experiments and related results are also explained.
Two-Stage Routing: A Coexistence Method for Content Centric Network and Traditional End-to-End Network
Authors: Tian Ming , Lan Ju Long , Cheng Dong Nian , Liang Ning Ning
Published: March 2013

After a deep analysis on two aspects of challenges in the traditional network architecture, for the challenge of repetitious access and transmission of hot topic information, content store module supporting hot topic awareness is added in the access convergence routers; for the challenge of low efficiency of quality of service guarantee, connection oriented virtual circuit –omnibus circuit is proposed. The whole structure and specific operation of two-stage routing are designed, the system advantages and feasibility is analyzed at last.
Mathematical Modeling and Design for Swing Cams of Constant Spring Hangers
Authors: Chen Li Hua
Published: March 2013

Swing cams are important components of main-compensating constant spring hangers, therefore the design of cam curve is the key of constant spring hangers. The working principle of the constant hangers is studied .Based on the mechanical analysis of the constant spring hanger, the mathematical model of cam curve is established by means of coordinate transformation. Meanwhile, the cam curve model is programmed in the MATLAB programming environment, and then IBL document that consistent with the PRO/E is generated, after that the model is imported into PRO/E to achieve three-dimensional modeling of the cam. The method in this paper effectively and accurately solve the swing cam problems.
The Information Model of 3D Design and Manufacture Facing Digital Factory
Authors: Cui Jian , Yan Tao Li
Published: March 2013

Digital factory is a new form of organization of production. To meet the urgent needs of three-dimensional digital design and manufacture in business, the paper put forward the new digital factory concept and foundation .On the based of MBD(Model based Definition) , the phase of integrated design information, process information and manufacturing information were integrated, the data, organizational model were researched, which realized he paperless management of digital design and manufacturing. Finally, the practical application was the validation to theoretical in an enterprise. The results showed that digital factory achieved the optimal management of product design and manufacturing process.
Full-Custom Design and Implementation of High-Performance Multiplier
Authors: Wang Ren Ping
Published: March 2013

I proposed a method of using full-custom design 32 × 32 multiplier to enhance performance, reduce the power consumption and the area of layout. I use improved Wallace tree structure for partial product compression, truncated beyond the 64 part of the plot and the look-ahead logarithmic adder using Radix-4 Kogge-Stone tree algorithm raise the multiplier performance. In the design of Booth2 encoding circuit and compression circuit, I use a transmission gate logic design with higher speed and smaller area. I also use Euler path method and heuristic Euler path method to reduce the layout area. The design use SMIC 0.18μm 1P4M CMOS process, with a layout area of 0.1684mm2. In a large number of test patterns, simulation results show that the computation time of a 32 × 32 multiplication is less than 3.107ns.
Effects of Rolling Resistance on Shear Behavior and Anisotropy of Granular Matters
Authors: Liu Yi Ming , Mao Hai Jun , Yang Chun He
Published: March 2013

Standard discrete element method does not take the effect of rolling resistance into account. To overcome this shortcoming, a contact model considering rolling resistance is developed and implemented into PFC2D. Using this contact model, a series of numerical biaxial compression tests are carried out. The results of these numerical simulations show that rolling resistance has remarkable effects on shear strength and shear dilatancy of granular matters, and these trends are agreed with previous studies, which proves that this model works well. Then the effect of rolling resistance on anisotropy of granular matters is studied in this paper. It can be seen that rolling resistance has dramatic effect on the anisotropy of granular matters. The anisotropy of granular matters increases with rolling resistance.
Study on X-Ray Integral Diffraction Intensity of GaAs Photocathode
Authors: Shi Feng , Chang Ben Kang , Cheng Hong Chang , Xu Xiao Bing
Published: March 2013

In order to precisely predict the sensitivity of Ф18 mm transmission-mode GaAs photocathode, a concept of integral diffraction intensity is proposed based on X-ray diffraction principle after analyzing the predecessors′ limitations of testing the micro-area of such photocathode and GaAs photocathode of image intensifier tube is plane electron source in this paper. The integral diffraction intensity on the entire photocathode surface was obtained by multi-points detection in the effective area of the photocathode with integral method. The crystal quality of entire photocathode surface will be taken with the integral diffraction intensity. According to the principle, X-ray diffraction testing for 4 samples of GaAs photocathode modules was executed with high-resolution four-wafer X-ray Diffractometer whose test spot size is 4 mm×5 mm. The diffraction curves were obtained and the integral diffraction intensity was calculated. Subsequently the 4 photocathode modules was activation processed with Cs-O in ultra-high vacuum system simultaneity the photocurrent of photocathode modules was measured. Comparing the variation of diffraction curve with integral diffraction vs photocathode photocurrent curve, they show that the greater the integral diffraction intensity of is, the more photocurrent is in the photocathode module. The variation relation curve between X-ray integral diffraction intensity and photocurrent in the photocathode was fitted with least square method. The curve, which accords with logarithm curve and whose fitting degree is 0.878, was achieved. Since photocathode sensitivity is direct proportion to photocathode photocurrent. The above results prove that A Practicality Φ18mm photocathode of image intensifier tube is plane electron source, GaAs photocathode sensitivity and other photoelectric performance lies on entire photocathode surface crystal quality, the photocathode module integrality reflected by the integral diffraction intensity plays crucial role of GaAs photocathode sensitivity. So integral sensitivity of Ф18 mm transmission-mode GaAs photocathode can be precisely predicted with X-ray integral diffraction intensity, some feasible ideas for further research of GaAs photocathode was obtained in this paper.
Progress of TiO2 Photocatalytic Oxidation Technology in Algae Removal
Authors: Yu Hua Jiang
Published: March 2013

In this paper, the development in the degradation of microcystic toxins and algae removal by TiO2photocatalysts is reviewed, analyzing the prospect and pinpointing the key factor of the technology. TiO2, which is insoluble, nontoxic, inexpensive and catalyst-efficient, shows good chemical inertness. For the degradation of microcystic toxins and algae removal, TiO2 photocatalysts is superior to the traditional processing technology and method, contributing a lot to environmental protection.
Similar Constructive Method for Solving the Nonlinear Spherical Percolation Model in Dual-Porosity Media
Authors: Bao Xi Tao , Li Shun Chu , Gui Dong Dong
Published: March 2013

This paper presents a spherical percolation model for dual-porosity media reservoir, where the quadratic-gradient term, wellbore storage and three types of outer boundary conditions: constant pressure boundary, closed boundary and infinity boundary were considered. Then a new method: Similar Constructive Method was put forward for solving this type of percolation model. And solutions of the dimensionless reservoir pressure and the dimensionless bottomhole pressure in Laplace space were obtained. It was proved that these solutions had a similar structure. The Similar Constructive Method is an elementary and algebraic method, simple and practical. And the similar structure of solutions can simplify the well test analysis software programming and analyze the reservoir parameter’s affection on pressure conveniently. The present research has a great academic significance and application value in oil-gas field development.
Research on Austenite Static Recrystallization Kinetics of Ultra-High Strength Dual Phase Steel
Authors: Li Zhuang , Wu Di , Lv Wei , Zheng Zhen , Kang Shao Pu
Published: March 2013

In this paper, double deformation test was conducted in a MMS-300 thermomechanical simulator. Austenite static recrystallization kinetics of ultra-high strength dual phase steel was investigated. The results have shown that the softening fractions increase with holding time as a whole. Under deformation temperatures of 950°C, 1000°C and 1050°C, the softening fractions increase with the increase of the deformation temperature. And the softening curve appears relatively flat under deformation temperatures of 950°C. The austenite no-recrystallization temperature (Tnr) of ultra-high strength dual phase steel was between 900°C and 950°C. Double deformation test conditions which promoted Nb(CN) precipitation resulted in a decrease of a austenite recrystallization. Strain induced precipitation of Nb (CN) was the main reason why the softening curve appeared a plateau.
The Microstructure and Properties of Ti50Ni47Fe3 and Ti50Ni46.75Fe3Cr0.25 Shape Memory Alloy
Authors: Kang Xiao Yu , Li Yan Feng , Yin Xiang Qian , Xie Hao Feng , Mi Xu Jun
Published: March 2013

Comparing with Ti50Ni47Fe3alloys, the influences of Cr on the mechanical and shape memory properties of Ti50Ni47Fe3alloys are investigated by study on phase transformation and microstructure analysis. The results show that Ti50Ni47Fe3and Ti50Ni46.75Fe3Cr0.25shape memory alloys exhibit two-stage martensitic transformation. The transformation temperatures decrease with the addition of Cr. The microstructure of the Ti50Ni47Fe3and Ti50Ni46.75Fe3Cr0.25alloys consists of TiNi matrix, Ti2Ni phase. Fe element prefers to substitute for Ni in the matrix than black particles. Cr all substitute for Ni in the matrix and not be analyzed in the Ti2Ni phase. The mechanical property of Ti50Ni46.75Fe3Cr0.25alloy is better than Ti50Ni47Fe3alloy.
Research of Micro-Arc Spark Deposition of Stellite Alloy on SCH13 Steel and High-Temperature Oxidation Property
Authors: Zhang Chun Hua , Chen Ming Lian , Zhou Lei , Zhou Gong You , Zhang Song
Published: March 2013

As is known to all, the technology is an effective way to improve the material surface performance. In this paper, Micro-arc spark deposition with stellite 6 alloy as the coating material on SCH13 steel substrates was carried out using high-energy micro-arc process. The microstructure, chemical composition, phase identification and hardness of the deposition layers were examined by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and Micro-hardness tester, respectively. Moreover, through high temperature oxidation, the property for the deposition layers of resistance to high temperature oxidation was analyzed systematically. The results show that the coatings were consisted of γ-Co solid solution and chromium carbides. The epitaxial growth coating with columnar grains was achieved by micro-arc spark deposition and the coating of stellite 6 alloy has a good metallurgical combination with the SCH13 steel substrate. After high temperature oxidation at 900°C, the surface film of the deposition layers were mainly consisted of chromium oxides, and the surface oxide film of SCH13 steel was Fe2O3and NiCr2O4, the property for the deposition layers of resistance to high temperature oxidation is obviously better than SCH13 steel substrate.
Reliability Research of 50 Axle Steel on the Ultra-High Cycle Fatigue Fracture Behavior under Ultrasonic Loading
Authors: Tang Wei Wei , Wang Hong
Published: March 2013

In order to ensure the reliability of the fatigue design, the dispersion of S-N data obtained by ultrasonic fatigue test is usually researched by statistical assessment. Life distribution of fatigue strength of steel materials follows the lognormal distribution or Weibull distribution in general. In this paper, 50 axle steel is researched under symmetric tension and compression loading, and the ultra-high cycle fatigue test data of 50 axle steel are researched by the Weibull distribution, 50 axle steel is described by equation of Basquin, the mode of probability S-N curve are established. The results shows that very high cycle fatigue S-N data of 50 axle steel under symmetric tension and compression loading obey the Weibull distribution. Similar to the S-N curve of 50 axle steel, the probability S-N curves display the characteristic of “the multi-stage type” under the Weibull distribution.
Effects of the Morphology and Distribution of Ferrite and Martensite on Mechanical Properties of Dual-Phases Steel
Authors: Guo Jia , Zhu Guo Sen , Yao Zhi Qiang , Liu Jie , Du Yu , Li Fei
Published: March 2013

The ingots were rolled by 550 mills in laboratory to obtain dual-phase steels. The influence of the morphology and distribution of ferrite and martensite on mechanical properties of dual-phase steel was investigated. The results indicated that some amount of acicular ferrite transformed in DP steel is available for decreasing the size and homogenizing the distribution of martensite in ferrite base. Meanwhile, the values of yield strength, tensile strength and impact toughness increases apparently, the value of elongation decreases to 22.5% .
Synthesis and Application of New Carboxyl Modified Silicone Oil
Authors: Lei Ning , An Qiu Feng , Ning Jiao Jiao
Published: March 2013

A kind of new carboxyl and vinyl co-modified silicone oil (Vi-CAS-1) was synthesized with vinyl/amino co-modified silicone oil (Vi-ASO-1) and maleic anhydride (MA) as raw materials. Then 0.03 % Vi-CAS-1 in ethyl acetate solution was used as a finishing agent, the performance of Vi-CAS-1 on dacron fabrics was studied, and the effects of carboxyl equivalent, viscosity and the mole ratio of raw materials such as Vi-ASO-1 to MA on the Vi-CAS-1 performance were also investigated carefully. The results shows that, the elasticity and flexibility of fabrics treated by Vi-CAS-1 significantly increase. And when cooperate with the silicone which contains Si-H (PHMS-0.16 %) in application, the compounded Vi-CAS-1 can improve the fabric water-repellency to some extent, as compared with the fabric treated only with Vi-CAS-1.
Influence of Calcium Ion on Thermal Degradation and Flame Retardance Behaviour of Alginate Fiber
Authors: Tian Guang Xiu , Ji Quan , Quan Feng Yu , Xia Yan Zhi
Published: March 2013

Experimental research on calcium alginate fibers thermal degradation and flame retardancy under catalysis of metallic salts was done by limiting oxygen index (LOI), scanning electron microscopy (SEM), and thermogravimetric analysis (TG) methods. LOI results show that with increasing calcium ions content, the flame retardant properties of the calcium alginate fibers improves further. The residues of calcium alginate fibers gradually retained fiber shape and on the surface of the residues the holes reduced, with the calcium ion content increasing. TG indicates temperature at maximum rate of weight loss (T-max) was clearly shifted from 246 °C for alginic acid fibers to 244°C, 236°C, 208°C, 205 °C and 203°C (SCa-1-1# calcium alginate fibers, SCa-2-2# calcium alginate fibers, SCa-3-3# calcium alginate fibers, SCa-4-4# calcium alginate fibers, SCa-5-5# calcium alginate fibers), respectively. The thermal degradation residues at 1000°C for different calcium alginate fibers are 13.7%, 16.1%, 17.2%, 18.2%, 18.4%, 19.2%, separately. Further discussion of the combustion process and flame retardant mechanism is presented.
Preparation of BiFe1-xCoxO3 Ceramics via a Simple Solid Method and Enhanced Multiferroic Properties
Authors: Ye Gong Lan , Xu Jian Mei , Alonso José Antonio , Wang Zheng Xi
Published: March 2013

BiFe1-xCoxO3(x= 0-0.3) polycrystalline samples were prepared in order to study the effect of Co substitution on BiFeO3structural, magnetic and electric properties, which to the best of our knowledge, the related work has not been reported. The samples were synthesized by a simple solid-state method, which the process contains mortar grind, calcinate, press and sinter. The crystal structures were refined from XRD data in the acentric R3c space group; a second phase CoFe2O4was identified, in increasing amounts with the increase of x. The magnetic moment is greatly improved and the magnetization for BiFe0.96Co0.04O3was found to be 0.756 emu/g.
Indirect Solid Freeform Fabrication of Complicated Ceramic Parts Based on Stereolithography and Gelcasting
Authors: Wu Hai Hua , Du Xuan
Published: March 2013

It is difficult to fabricate complicated ceramic parts with conventional manufacturing methods such as injection molding and slip casting. In this paper, an indirect solid freeform fabrication process based on Stereolithography (SL) and gelcasting to shape complicated ceramic parts. A lost resin mold with negative image of part was first fabricated by SL. And then aqueous ceramic slurry with high solids loading and low viscosity were prepared and poured into the resin mold, a wet gelcast body was obtained by in-situ polymerized, and the vacuum freeze-drying technology was used to eliminate the deionized water in the gelcast body for improving efficiency and decrease drying shrinkage. Based on the thermogravimetric analysis results of resin mold and gel ceramic body, a sintering process was carried out to remove mold, organic binder and to sinter ceramic. Finally, the desired ceramic part was successfully fabricated to verify the feasibility and effectiveness of the novel process.
Analysis of Porous Media Sediments on Seismic Response of Concrete Dams
Authors: Yan Yi Zhi , Su Zhi Min
Published: March 2013

To solve the problem of sediments on seismic response of concrete dams, pressure wave formula of saturated porous fluid-solid two-phase medium was derived from the Bait’s consolidation theory, and was determined the seismic response magnitude of sediment on concrete dam. The method was applied to analyze the influence of sediments thickness and permeability on hydrodynamic pressures. Finally, a typical example is analyzed. The result shows sediments are able to decrease hydrodynamic pressures.
Performance of Diamond Cup Wheels with Nano-Scale Rare-Earth Oxide and Carbide
Authors: Cheng Yun Ping , Wang Cheng Yong , Wu Wen Ge , Hu Ying Ning
Published: March 2013

Diamond cup wheel is one of important tools for machining of ceramic tile. In this paper, ceramic tiles were ground by diamond cup wheels which segments adding nano-scale rare-earth oxide and nano-scale carbide on a special designed test machine. The wear resistance of diamond cup wheels and materials’ removal process of ceramic tiles had been tested, and grinding ratio were calculated and compared. Different grinding ratios can be obtained according to different technological parameters. The segments of adding nano-scale rare-earth oxide and nano-scale carbide were observed from microgram and metallography structural pattern. The results showed that nano-scale rare-earth oxide and nano-scale carbide can fine structure, make grain boundary clear and increase grasping of diamond grits.
Research of Casting Process about Cover and Pump Body of Tonghai Pump and Mechanical Properties Test
Authors: Wu Lan Ying , Xiang Xiao Lian , You Long
Published: March 2013

In order to obtain cover and pump body of tin bronze Tonghai pump that is dense and good pressure resistance,the casting mold of the cover of Tonghai pump is metal mold. The casting method of Tonghai pump is vacuum counter-pressure casting.The method of casting pump body of Tonghai pump is vacuum investment casting. This research is about reasonable casting process parameters of vacuum counter-pressure casting and vacuum investment casting.Finally qualified castings of cover and pump body of Tonghai pump can be obtained.
A New Nonlinear Stress-Strain Model for Soils at Various Strain Levels
Authors: Chen Cheng , Zhou Zheng Ming
Published: March 2013

Soils have nonlinear stiffness and develops irrecoverable strains even at very small strain levels. Accurate modeling of stress-strain behaviour at various strain levels is very important for predicting the deformation of soils. Some existing stress-strain models are reviewed and evaluated firstly. And then a new simple non-linear stress-strain model is proposed. Four undetermined parameters involved in the proposed model can be obtained through maximum Young’s module, deformation module, and limit deviator stress and linearity index of soils that can be measured from experiment directly or calculated by empirical formulas indirectly. The effectiveness of the proposed stress-strain model is examined by predicting stress-strain curves measured in plane-strain compression test on Toyota sand and undrained triaxial compression test on London clay. The fitting results of the proposed model are in good agreement with experimental data, which verify the effectiveness of the model.
The Research on Industrial Design Application in Integrated Ceiling Product Innovation
Authors: Ge Qing , Wang Yin
Published: March 2013

As the core elements of competition, Industrial design plays a great role in product innovation and management innovation and incentive. In recent years the integrated ceiling market develops rapidly in our country in which the industrial design of integrated ceiling product innovation has played a huge role in promoting. The application of industrial design in integrated ceiling product innovation is mainly divided into four aspects: technical innovation, market innovation, design innovation, design management innovation. As a result of these four aspects of innovation, integrated ceiling industry successfully realizes upgrading.
Evaluation Method about Braking Force Utilization
Authors: Zhang Yan , Liu Cheng Ye
Published: March 2013

For the braking performance investigated when vehicle was on the road of different road adhesion coefficient, the match of ideal braking force distribution curves of front and rear wheels and front and rear arresters was studied. The concept of braking performance to reflect "braking force utilization" was introduced.The braking force utilization algorithm came out depending on the different matches. A light bus was chosen as an example. Vehicle braking performance under different road adhesion coefficient was studied in detail.At the same time, vehicle braking performance under different matches was studied with braking force distribution value changed. The results indicate that, braking force utilization appears first increased and then decreased with the increase of road adhesion coefficient.Along with the increase of braking force distribution value,the braking force utilization decreased on low adhesion coefficient road,then increased on high adhesion coefficient road.The method could evaluate the braking performance on the road of different road adhesion coefficient efficiently.
A Novel Planar Extended Doublet Filter with Substrate Integrated Waveguide Cavity Resonators
Authors: Shen Kai , Li Tao , Wang Jing Jing
Published: March 2013

A novel planar extended doublet filter based on substrate Integrated waveguide cavity resonators was proposed for the first time. This filter consists of a main doublet with an additional resonator grown in one of the branches. The source and load are coupled to both branches of the doublet in order to generate two transmission zeros. By employing the combinational structure of the TE101-mode and TE102-mode of the SIW cavity resonators, the negative coupling coefficient required for the design of a single-layer cross-coupled SIW bandpass filter is implemented. The measurement results show the return loss of the implemented filter is above 13dB, the insertion loss is below 4.238dB with only 0.56% of the bandwidth.
Streamer Corona Plasma Assisted Nonpremixed Flame Holding of a Propane Jet
Authors: Duan Li Wei , Hong Yan Ji , Ma Di , Yang Yin Jun
Published: March 2013

A streamer corona discharge plasma was used to assist a propane-jet flame. The nonequilibrium plasma was produced by a 10k Hz sinusoidal power source. The experimental results shows that a streamer corona was generated between the flame edge and the nozzle, and the use of the streamer corona plasma discharge resulted in significant increase in flame stability.