bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation of Suction Valve Internal Flow Field of Large Scale Diaphragm Pump Fluid End Based on ADINA
Authors: Ling Xue Qin , Zhang Wei , Chen Yang
Published: June 2013

Suction valve is a critical and vulnerable component in fluid end of large scale diaphragm pump. Slurry flowing state in suction valve affects transport efficiency and operational life span of diaphragm pump directly. It is necessary to analyze internal flow field of suction valve for confirming structural factors which affect flowing state of slurry. In this paper, suction valve of three-cylinder single-acting diaphragm pumps as a research subject, internal flow fields of suction valves which have different structures are simulated by finite element analysis software ADINA. Velocity distribution graphs and vector graphs of flow field can be obtained from analysis results. Flowing characteristic regulations affected by inner structure of valve are summarized. The research results in the paper provide some theoretical guidance for researching and developing of suction valves and relevant products.
Research on Applications of EPKS C300 System to Steam Turbine and Boiler
Authors: Liu Jie , Jin Chang Yi
Published: June 2013

A new HONEWELL process controlling system, namely EPKS C300, was systematically introduced. Applications of the system to 7# steam turbine and 9# boiler in the Baling Petrochemical Thermal Power Division and some important controlling strategies have been briefly investigated. EPKS C300 was used for the technical reform of the steam turbine and boiler. SCM sequence control, drum level three impulse control and DEH system modification were implemented on the boiler. With the help of FSSS system, furnace safety monitoring, automatic speed regulation of steam turbine unit, load automatic control and main steam pressure automatic control were realized.
Research on Cumulative Damage for Airborne Vehicle under Landing Impact
Authors: Li Jian Yang , Wang Hong Yan , Rui Qiang , Hong Huang Jie
Published: June 2013

The damage of structure and technical performance of vehicle were affected by the impact at landing process of airborne. For researching the cumulative damage of airborne vehicle under impact, airdrop tests would consume lots of manpower and material resources. So numerical simulation offered one of available means for this problem. Based on the finite element model of vehicle and airbags, the calculation and assessment method for cumulative damage under landing impact time after time was proposed. The creditability of finite element model was validated by airborne test under typical condition. Associated with Lemaitre damage model and the damage evolution law of the material, the cumulative damage of the structure of vehicle was calculated. The results would provide theoretical reference and technical guidance for the design and maintenance of the airborne vehicle.
Research on Hysteresis Characteristic Model of Wheel Carcass
Authors: Guan Hsin , He Rong , Guo Rui
Published: June 2013

In the existing wheel model, rim and rigid ring are connected with six direction spring and damper, which represent the elasticity of wheel carcass. In this paper, based on the ASCL original wheel model, the six direction hysteresis characteristic model of wheel carcass is built. In the vertical direction, Berg model which is widely used to describe the hysteresis characteristics of the rubber bushing is built to describe the hysteresis of wheel carcass, whose dynamic parameters are more consistent with the actual situation. In the other direction, the Fancher formula is used to describe the relationship of the force and displacement. Results showed out that the model has a high accuracy and is able to accurately describe hysteresis characteristics of wheel carcass by comparison with the suspension system K&C experimental results.
Research on Temperature Effect on the Natural Frequencies of Continuous Beams Based on Stochastic Subspace Identification
Authors: Cheng Yong Chun , Shi Yu Ping , Tan Guo Jin
Published: June 2013

Natural frequencies are of great value to bridge structural design, health monitoring and detection. Related research data show that the ambient temperature can affect the natural frequencies of the continuous box-girder bridges. In order to research the effect of temperature on the bridge structure and conclude the influence law, theoretical analysis of temperature effect on the natural frequencies of the continuous box girder bridges is conducted based on the stochastic subspace identification. First, the finite element model of the bridge is built to conduct thermal-structural coupling analysis. Then regard the analysis results as the original state, and exert white noise excitation on the structure to obtain the dynamic response of the structure. And then analyze the dynamic response based on the stochastic subspace identification and calculate the natural frequencies of the bridges under the temperature effect. At last, based on the practical project of one 3-span continuous box-girder bridge, the validity and the reliability of this method is verified.
Simulation Research of Angle Action on Fold-Type Board in Air-Heating Collector
Authors: Qiu Lin , Niu Run Ping , Yan Min , Yang Jin
Published: June 2013

In this study a fold-type board collector in air-heating is introduced. The factor of fold-type board collector angle action that contributes to the temperature and velocity field were respectively discussed. Numerical simulation of the thermal properties of fold-type collector on different angle with Fluent software. Numeric simulation calculations shown: the fold-type board collector angle action has a greater influence for the thermal properties of collector in air-heating ,the thermal efficiency when is 30°is better than is 45°and is 60°and under this work simulation condition the optimum angle for folded-type panel air collector will be recommend nearby at =30°.
The Elastohydrodynamic Lubrication Analysis of Composite Material Gear
Authors: Fu Xiao Xin , Wang You Qiang
Published: June 2013

The composite material gear was manufactured with modified PEEK materia1.The transient EHL solution of composite material gear was obtained by numerical simulation analysis in oil lubrication conditions.The simulation result of the composite material gear was compared with that of the steel-steel gear. The results show that the meshing oil film between composite material gear pair is thicker than that between steel-steel gear and the maximum oil film pressure in the meshing point between composite material gear is lower than that between steel-steel gear in the same conditions.
The Modeling and Simulation of Two-Way Cartridge Check Valve Based on the AMESim
Authors: Fang Gui Hua , He Wen Bin , Liu Ya Bin
Published: June 2013

According to the structural characteristics and working principle of the two-way cartridge check valve, the static and dynamic characteristics are analysed, the AMESim model is built, and the dynamic simulation of analysis is investigated. Through analyzing the simulation results to prove the rationality of the model.
Study on PLCC Lead Free Solder Joint's Thermal Reliability Based on Shape Prediction and Response Surface Methodology
Authors: Zhu Jing , Wu Zhao Hua
Published: June 2013

In this paper, PLCC lead free solder joint’s thermal fatigue lifetime is analyzed by using the Response Surface Methodology, combined with solder joint’s shape prediction and finite element simulation. Three key solder joint’s process parameters, pad length, gap height and solder paste’s volume are chosen to build an orthogonal array , 25 PLCC lead free SAC305 solder joint’s models with different parameters combination are built in Surface Evolver to predict the solder joint’s shape. Then the PLCC device’s surface shape models in Surface Evolver are converted to three-dimensional finite element models by using a special method. Thermal analyses give the distribution and the change of thermal stress and strain, which show the dangerous solder joint in the whole PLCC device and position with weak thermal reliability in single solder joint. Furthermore, the PLCC solder joints’ thermal fatigue lifetime are calculated with the modified Coffin-Manson equation, and the series of thermal fatigue lifetime data are processed by the Response Surface Methodology. Regression equation between thermal fatigue lifetime and the three key factors is concluded. With the solder joint’s influencing rule on thermal fatigue lifetime and the solder joint’s process parameter combination belong to the highest thermal fatigue lifetime, assembly process of PLCC is improved and then enhance the PLCC solder joint’s reliability.
Analysis on Electrical Connector Corrosion in Southeast Coastal Areas
Authors: Du Kang , Xu Jun , Zhang Yao Hui , Wei Zi Jie
Published: June 2013

The special atmospheric environment accelerats the corrosion process of electrical connectors in southeast coastal areas. It causes the failure probability increased and the reliability level declined. This paper discussed the most kinds of electrical connector corrosions in southeast coastal areas. The corrosion characters of the metal material used on the electrical connectors are expounded, and environmental factors in the corrosion of electrical connectors are introduced at length.
Harmonic Responses of Blades with Piezoelectric or Piezomagnetic Coatings
Authors: Wang Jiao , Li Ya Shu , Sha Yun Dong , Han Qing Kai
Published: June 2013

A successful prediction that whether a compressor blade is able to overcome the resonance fatigue and fatigue life of forced vibration is based on its harmonic response analysis.Hard coatings with metal or ceramic substrate are effective to change the natural characteristics and vibration amplitude of a compressor blade so that to improve the anti-vibration fatigue capability. In this paper, modal analysis and harmonic response analysis based on the finite element method are achieved to investigate the contributions of the two different hard coatings on the natural characteristics and vibration amplitude of a compressor blade. The two kinds of hard coatings are modeled by both anisotropic materials and involving their piezoelectric or piezomagnetic effects. The blade is modeled as an isotropic one. The natural frequencies and vibration amplitude of blade with different coating thickness are numerically calculated and compared. Results show that the hard coatings with different thickness play an important role in the natural characteristics and harmonic response analysis of the blade.
Ka-Band Satellite Channel Multi-State Markov Model Based on Dust Storm Weather and Shadow Multi-Path Effects
Authors: Guo Ye Cai , Yuan Tao , Zhang Xiu Zai
Published: June 2013

In the existing Ka-band satellite channel model, the weather condition considered in the modeling are relatively ideal, so it can't be used to the dust storm weather well. In order to establish the satellite channel model under the condition of dust storm weather, the satellite channel propagation characteristic of dust storm weather is analyzed firstly. Secondly, the several states of the satellite channel model in the dust storm weather are divided by fuzzy clustering analysis method. Finally, Ka-Band satellite channel multi-state Markov model based on dust storm weather and shadow multi-path effects is established and simulated. The simulation results show that the proposed Ka-band channel model is very agreeable with the measured data.
Simulation Study on Power Load Characteristics Influence Voltage Collapse Process
Authors: Bao Xiao Hui
Published: June 2013

This paper proceeds from basic circuit model, analyzing the influence of different characteristic load on voltage collapse. And then make the simulation system design. Take some examples to analyze the relation of the process of voltage collapse with system and load conditions.
The Research on the Theory of Flow and Method of Ripple Control of the External Gear Pump Group
Authors: Yu Li Juan , Zhang Xue Cheng , Wang Xiao Dong
Published: June 2013

In this paper, the theory of flow and method of ripple control of the external gear pump group are studied with two same-parameter external gear pumps which are installed in the form of parallel and different phase. In this thesis, the external gear pump group is known as a low ripple gear pump group, and the theory of ripple control is based on the theory that two periodic and quadratic function curves of different phase superposition can reduce the amplitude variation. According to this method, the thesis starts to analyze the instantaneous flow of the low ripple gear pump group, moreover which are compared with the instantaneous flow of a single gear pump. Finally, it is concluded that the flow pulsation rate of low ripple pump group is equal to 1/4 times of a single pump flow pulsation.
A Fast Convex Hull Algorithm of Planar Point Set
Authors: Jiang Hong Fei
Published: June 2013

In this paper ,a new algorithm is proposed for improving speed of calculating convex hull of planar point set .The algorithm creates a square mesh to manage points ,when eliminating points which are obviously in convex hull ,selecting or eliminating of points can be converted to that of grid , work of calculation depends on points near edges of convex hull and density of grid but not the number of points ;at the meantime ,remainder points are sorted roughly .When calculating convex hull of remainder points ,a method is presented which can take advantage of order of remainder points ,it calculates boundaries of convex hull segment by segment ,then ,combines the boundaries to form convex hull.
Damaged Ship Anti-Flooding Decision Plan Intelligent Generation System Based on Petri Net and Heuristic Color Genetic Algorithm
Authors: Li Ang , Pu Jin Yun
Published: June 2013

No matter in the wartime or in the peace time, the intelligent generation system of damaged ship anti-flooding decision plan is an important tool to guarantee ship survivability and safety. The intelligent decision plan generation system which has high search efficiency plays an important role in recovering the buoyancy and stability indicts of damaged ship. The intelligent decision plan generation system introduced in this paper contains Petri net model and heuristic color genetic algorithm. The Petri net is used to model the ship anti-flooding decision process and the heuristic color genetic algorithm is used to solve intelligent hull balance decision problem. The traditional genetic algorithm is improved according to the special demand of hull balance. Based on the definition of the colored gene and the foundation of the heuristic search rules, the heuristic color genetic algorithm is given to improve the traditional genetic algorithm search efficiency.
A Face Detection Method Based on Log-Gabor Filters
Authors: Yu Qing Wen , Wang Hong , Zhao Hai Bin , Liu Chong , Yan Shi Yu
Published: June 2013

This paper introduces an effective face detection method based on log-Gabor filters. First, Information contained in the log-Gabor transformations is analyzed. Next, 5-scale and 8-orientation log-Gabor filters are constructed to extract feature vectors. Then, a three-layer feedforward network is created for feature classification. After training the network, we test 80 samples. From the experimental result, log-Gabor filters based method has comparable detection performance with Gabor filters based method. Therefore, log-Gabor filters can encode the images more efficiently.
Simulation of A/D Conversion with LabView
Authors: Wang Bing , Wang Xiao Li
Published: June 2013

Simulation technology was a very important technology in the parallel signal processing research. A type of antomatic controlling simulation system was introduced, which was built by taking LabVIEW as the software platform, using LabVIEW user interface interacting with the Simulink model. Simulation of processing often requires algorithm and performance evaluation of parallel environment. Signal processing often requires simultaneous acquisition of multi-channel analog signals. Taking dual-channel A/D conversion processes as an example, using LabVIEW with VC, it achieves a simulation of parallel signal process of A/D conversion process.
Phase Diagram and Research for the Ternary System of NaCl-CsCl-H2O at 50°C
Authors: Zhang Yong Ming , Ma Li Chun , Liu Cheng Lin , Chen Li Fang , Shen Dong Liang , Ren Cai Xia , Xu Hai Ming , Jia Jiu Chen
Published: June 2013

The equilibria phase of the ternary systems NaCl-CsCl-H2O was studied at 50°C by the isothermal evaporation method. The equilibrium phase diagrams were plotted in line with the experimental data. It suggest that the phase diagram of NaCl-CsCl-H2O is the simple eutectic type where one invariant point is found to have the compositions of 12.3% NaCl, 54.1% CsCl and 33.6% H2O by mass, respectively. The study provide fundamental thermodynamic data of brine system that contains sodium and cesium, and has practical significance for the brine’s comprehensive utilization.
Design of a Scene Federate in the Proving Ground Simulation Platform
Authors: Gan Bin , Wang Wen Guang
Published: June 2013

In order to reduce the risk of the range missile experiment and decrease the cost of the range missile development, we design and implement a scene federate in the proving ground simulation platform based on HLA, and analyze and solve the key problems of entity behavior modeling, multi-channel display. By integrating the under tested radar measuring system, optical measuring system with the computer simulation system, utilizes the feature information of the proving ground and weapon systems, and the missile trajectory measurement parameters to vividly exhibit a three-dimensional scene for the whole process of the missile proving ground test. The system can aid the experimentalist for observation, command, and decision-making.
Meso-Scale Oriented Physical Simulation Model for Complex Product Maintenance in Virtual Environment
Authors: Peng Gao Liang , Liang Hong , Li Xin
Published: June 2013

Large component disassembly is complex tasks, the collision during the operation process often cause component damage and deform, even bring safe accident and result in significant loss. This paper proposes to use Meso-dimential oriented physical simulation strategy to research the collision effect simulation and damage surface visualization of large component during disassembly operation. Meso-collide behavior of multi-particles is adapted to simulate the macro-collision of large component. The method has important significance for expanding the mechanical simulation theory and solving the complex practical engineering problem.
Study and Simulation Analysis of OFDM System Based on Simulink
Authors: Li Tong Qiang , Xu Li Gang
Published: June 2013

Orthogonal Frequency Division Multiplexing(OFDM) is going to become the most important technique in the future communication system. The paper presents the principle of OFDM,establishes a simulation model of OFDM communication system based on simulink.By utilizing the system,we briefly analyse the simulation results and conclude the the performance characteristics of OFDM system.
A Grid Flow Management System for Resource Allocation Problem
Authors: Ding Li Li , Wang Xiao Ling , Wang Zheng Wei
Published: June 2013

This paper describes a framework for the grid flow management system in resource allocation problem based on the autonomous manager grid service (AMGS). We develop a user agent which is able to estimate the scoring rule based on grid resources attributes without human intervention, since agents are autonomous and intelligent in behavior. The reverse auction protocol involving an iterative algorithm for solving the resource allocation problem is also present. We implement the new protocol in a simulated environment and study its economic efficiency and its effect on the grid system performance.
Logistics Demand Forecasting with Asymmetry-Width Probabilistic Fuzzy Logic System
Authors: Wang Zhong Wei , Lu Li Xin
Published: June 2013

There are a lot of approaches in logistics demand forecasting field and perform different characters. The probabilistic fuzzy set (PFS) and probabilistic fuzzy logic system is designed for handling the uncertainties in both stochastic and nonstochastic nature. In this paper, an asymmetric probabilistic fuzzy set is proposed by randomly varying the width of asymmetric Gaussian membership function. And the related PFLS is constructed to be applied to a logistics demand forecasting. The performance discloses that the asymmetry-width probabilistic fuzzy set performs better than precious symmetric one. It is because the asymmetric probabilistic fuzzy sets variability and malleability is higher than this of the symmetric probabilistic fuzzy set.
Multi-Agent Technology Application in the ASCM Model
Authors: Chai Yi Xian , Xu Yan Li , Liu Dan
Published: June 2013

The bottlenecks of supply chain management need to be solved. The development of internet promotes the Agent technology. Internet makes the Agent technology become a powerful tool that breaks through the bottlenecks of the supply chain management skills. With the guidance of system engineering and methods, an agile supply chain management system with Agent technology of artificial intelligence is presented in this paper. The application of Multi-Agent technology in the ASCM model is discussed also. Results indicate that the application of Multi-Agent skill in the ASCM model is a feasible way of thinking and appropriate approach.
Research on Green Procurement Model Based on Green Supply Chain
Authors: Zheng Li Hua
Published: June 2013

Green supply chain is to supplement and perfect the traditional supply chain by introducing the green concept. Procurement to be green is rather important as one most important part of the supply chain. Its advanced to build a green procurement model, develop green procurement strategy and green procurement standards, so that green procurement and green supply chain will be benefits. In the long term, the establishment of a green procurement model, not only conducive the sustainable development of the supply chain, but also achieve environmental protection.
Culture Features in Car’s Headlights Form Design
Authors: Zhou Hui Ling , Li Kai Ling
Published: June 2013

Headlights are the focal point of the car-front-face. The genetic characteristics and development trends of Camry headlights were summarized by comparing their organization structures and making analogy with eyes. From cultural perspective, the internal relations between headlights characteristics and the esthetical psychology featured "quietude、shadows、harmony“ were suggested.
Research on Emergency Plan Management System for High-Speed Railway
Authors: Wang Yang , Xu Jie , Jia Li Min , Guo Jian Yuan , Kang Ya Shu
Published: June 2013

Based on the disadvantages of the current emergency management for high-speed railway, it is proposed the establishment of a scientific and efficient emergency management system. In this article, the general framework of the system is first described. Then, the major functional modules of the system are designed. Moreover, the system environment is introduced. In the end, the preliminary designs of the system interface are showed.
Study on Electromagnetic Properties of Ni-MWNTs Filling High Dielectrical EP Composites
Authors: Cao Xian Peng , Zang Chong Guang
Published: June 2013

In this paper, we got Ni-MWNTs through pretreatment of MWNTs and electroless plating of nickel, and observed the Ni-MWNTs and MWNTs with TEM and FTIR. In addition, we prepared Ni-MWNTs/EP and MWNTs/EP composites. The volume resistivity、permittivity and permeability of composites were measured. Results showed that the volume resistivity of Ni-MWNTs/EP was higher than MWNTs/EP’s when volume fraction was lower than 8%. The ε" of Ni-MWNTs/EP was larger than MWNTs/EP’s. It indicated that Ni-MWNTs/EP had better electromagnetic energy storing and consumption capacity. And the permeability of Ni-MWNTs/EP would increase with the increasing of Ni-MWNTs. Ni-MWNTs/EP had some ferromagnetism.
The Micro-Structure and Wear Behavior of the SiCp/Cu Composites before and after Chemical Plating
Authors: Hu Ming , Zhang Yun Long , Gao Jing , Liu You Jin
Published: June 2013

In order to improve the interface wettability between the SiCp and Cu materials, the chemical plating and hot pressing sintering technique were utilized to prepare the SiCp/Cu composites. The morphology of the SiC powder before and after chemical plating was studied and the micro-structure of hot-pressed sintered SiCp/Cu composites was investigated in details. The results showed that the finer SiC powder could improve the wear resistance ability of the SiCp/Cu composites obviously. The worn rate reduced with the size of the SiC powder increasing under the same load.
An Effective MECE Module as a Recycling Process for PET Diaphragm of Digital Paper
Authors: Pa P.S.
Published: June 2013

A newly devised process using micro-electrochemical machining (MECE) is described as a recycling module in the current study. The purpose is the precise removal of In2O3SnO2 thin-film nanostructures from optical PET diaphragm surfaces for digital-paper surface. In the current experiment it was found that a large rotational diameter (Dc) for the cathode with a small gap width between the anode and the PET diaphragm surfaces was found to remove the In2O3SnO2 rapidly. A small edge radius of the cathode, or a short arc length of the anode, reduces the time taken for In2O3SnO2 removal. A high feed rate of the PET and adequate electrical power results in fast machining. Pulsed direct current improves dregs discharge and this is an advantage with a fast feed. A high electrode rotational speed also corresponds to faster removal of the In2O3SnO2 nanostructures. The development of the proposed precision production design is based on both technical and economic considerations.
Identification of Volatile Compounds in Cooked Meat of Farmed Obscure Puffer (Takifugu obscurus) Using SDE and HS-SPME Combined with GC-MS
Authors: Wu Wei , Wu Rong , Tao Ning Ping
Published: June 2013

The volatile compounds of cooked meat in farmed obscure puffer (Takifugu obscurus) were isolated by simultaneous distillation and extraction (SDE)and headspace solid phase micro extraction (HS-SPME), and analyzed with gas chromatography-mass spectrometry (GC-MS). A total of 91 volatile compounds were identified under 3 different conditions by GC-MS analysis including 32 aldehydes, 11 alcohols, 10 ketones, 21 N- or S-containing aromatic compounds, 13 alkanes, 3 esters, and 1acid. In order to evaluate the major potential impact odorants extracted by SDE, the odor activity value (OAV) was calculated together with GC-MS. To estimate the contributions of volatile compounds to flavor isolated by SDE and HS-SPME, a parameter named relative odor activity value (ROAV) was applied. Results obtained showed that on the basis of OAV, it indicated that the compounds potentially most important to obscure puffer included 2,6-nonadienal, trimethylamine, 2,3-butanedione, (Z)-4-heptenal, 2-nonenal, and 3-methylbutanal. Based on ROAV, it was found that 2,6-nonadienal, trimethylamine, (Z)-4-heptenal, 2,3-butanedione, 2-nonenal, 3-methylbutanal, benzaldehyde, 2-ethylfuran, ethyl acetate, (E,E)-2,4-octadienal, octanal, 1-octen-3-ol, and nonanal may be responsible for the special flavor of cooked meat in the obscure puffer.
Mathematics Model of the Question of Micro-Pits Image with Direction-Uniformity Distribution and Area Scrambling Micro-Pits Image Design Methods Based on Regular Graphics Arrangement
Authors: Wang Hong Cai , Wang Yang
Published: June 2013

Mathematical model including design variables, constraint conditions and target functions is raised on the basis of problem description. Using the mathematical model, area scrambling micro-pits image design methods are presented. The methods can generate square area scrambling micro-pits image based on square-aligned-array arrangement, square area scrambling micro-pits image based on square-staggered-array arrangement, and area scrambling micro-pits image based on equilateral hexagon-array arrangement. The uniformity of the last one is the best.
The Principle and Applications of Colored Solar Cells
Authors: Shih Ju Yi , Lai Shu Ling , Cheng Huai Tzu
Published: June 2013

Solar Energy is a kind of green and renewable energy, and solar cells can be used to convert solar energy to electricity. Due to the requirements of carbon reduction and energy saving as well as the policy of Government incentive, the installation of solar energy system is becoming more and more popular. However, the available ground surface is limited, and the installation site of solar energy is gradually extended to building roofs, fish bonds and other special places. Because the traditional solar cells tend to monotonous dark blue or reddish brown color, the aspiration for colored solar cells is appeared in recent years to cope with the aesthetic requirement for solar facilities in the living environment. This paper discusses the principle and applications of colored solar cells, including the types of colored products, and the methods of making color change. In addition, the theory of chromatic has been used to explain the guidelines of color selection and coordination of solar cells in various situations and applications.
An Optimized Method for Choosing Friction Stir Welding Parameters
Authors: Wang Lei , Xie Li Yang , Hui Li , Li Ping Yun , Ren Jun Gang
Published: June 2013

Effect of rotating speed and welding velocity on properties of 6063-3A21 dissimilar Friction Stir weld was experimental studied, results show that too high or too low welding velocity will result in a decrease of the weld strength; effect of rotating speed on weld strength is relatively small. An optimized method for Choosing Friction Stir Welding parameters was proposed, which include three steps, first, fix a rotating speed through experimental analysis; and then find out reasonable ranges of v/w; finally work out the optimized welding speed range.
Analysis of Biological Dirt on the Sewage-Source Heat Pump Exchange Surface
Authors: Bai Li , Liu Tan , Lin Ying Zi
Published: June 2013

This experiment research the dirt adhere on heat exchanger in the sewage-source heat pump system，which contained moisture content test, ash content test, a digital microscope observation, scanning electron microscope observation, X-ray diffractometer analysis. The experimental results show that the heat exchange surface dirt moisture content is between 90.10% ~ 95.80%. The microflora of dirt is mainly staphylococcus and bacillus, and preferentially attach on rough position. Dirt main inorganic crystal component is SiO2 and Mg (SiO3).
Numerical Simulation Optimization Research of Cold Extrusion Forming for Injection Head
Authors: Lv Qing Qing , Yang Li Quan , Lv Xiu Ting , Zhao Lei , Wang Xi Kui
Published: June 2013

In order to obtain high-quality injection head, cold extrusion forming is adopted. Based on the study of forming technology for the injection head, reasonable process flow, cold extrusion pre-treatment process and boundary conditions are designed. Two finite element models in forward extrusion and backward extrusion forming ways are established. Taking DEFORM as the platform, the numerical simulation of forming process is carried out. Through simulation, the distribution of strain field, stress field and velocity field in the process of cold extrusion forming is preliminarily forecast, the merits and defects of two kinds of forming processes and the force state of mold are compared , the optimal forming scheme is determined.
A Technique Method of Recycling Cyanide Zinc Plating Waste Liquid in the Laboratory
Authors: Lei Shi
Published: June 2013

It introduces a kind of technique method that recycling cyanide zinc plating waste liquid in the laboratory, involving the fields in electroplating and comprehensive utilization of waste liquid. The process includes the following steps: first remove impurities in the waste liquid, and then add hydrochloric acid to adjust PH value. Using cation-anion and resin, through ion exchange method, remove disturbing ion Cu2+, Cr2O72- in the cyanide zinc plating waste liquid, thus cyanide zinc plating solution can be recycled. Using sodium hydroxide solution to make resin reproduced, and then add NaHSO3, NaOH solid to precipitate Cu2+ and Cr6+ in it, and do incineration treatment. This invention provides an easy and effective method of recycling cyanide zinc plating waste liquid in the laboratory, which improves the utilization of resources, and reduces pollution.
Influence of C and Φ Values on Slope Supporting by Soil Nailing Wall in Thick Miscellaneous Fill Site
Authors: Wu Di , Wang Peng , Liu Guo Qiang
Published: June 2013

In recent years, soil nailing wall supporting technology is widely applied in the design of pit supporting. However, in the design of deep foundation pit supporting in miscellaneous fill site, the values of cohesion and angle of internal friction, that is c and φ, are too conservative to be chosen, so the security and economy cannot be obtained together. To study the influence of c and φ values on deep foundation pit supporting design in miscellaneous fill site, Lizheng-FSPw60 was the analysis software, and the circular sliding simple slice method was the theory. It is concluded that cohesion and internal friction angle of the soil have great influence on the stability of the soil nailing wall. Analysis and practice show that if c and φ values are reasonably chosen, the slope supported by soil nailing wall in thick miscellaneous fill site will be much safer, and the project will be less wasteful.
Spectacular Display of Light Techniques — The Artistic Expression of Glass Materials in Modern Architecture Space
Authors: Yu Chang Fei , Yang Hao Zhong , Dong Qing
Published: June 2013

Studying the artistic expression of light and glass in modern architecture space by French designer Odile Decq, this article analyses the “agile space effect” of glass in architecture space,according to the glass characteristics of transparent and liquidity. The variability and advantage oflight and glass in architecture space is discussed here, light techniques in the information age produced by the building space effect and the aesthetic value is highly significant.
The Application of Glass Materials in Building Design
Authors: Zhu Wen Shuang
Published: June 2013

No other materials such as glass so profoundly change our life world. As the most times characteristics of building materials, glass not only meet the building function demand, but also for building bring unpredictable shadow charm and rich artistic emotion. Its light fully, and colorful blurred characteristics in a certain extent enrich the building space perception and mental connotation, but also change our city, our life, even the people themselves. Mastering glass material performance and unique emotional expression will be for glass buildings bring innovative opportunity and perspective, which brings a more brilliant chapter for architectural creation.
Application of Stress Box in Self-Stressing Test of Expansion Concrete Filled Steel Tube
Authors: Xu Chang Wu , Huo Kai Cheng , Ren Zhi Gang , Xiong Rui , Yang Tao
Published: June 2013

In order to validate the interface concrete self-stressing method of the homemade stress box can achieve the accuracy of the traditional test methods of the strain gauge pasted on the outer wall of steel tube and make up for its shortcomings, in this article, the self-stressing of expansion concrete filled steel tubular short columns with different expansive agent dosages are tested from homemade stress boxes, and the interface concrete stresses are converted from the measured strain by the strain gauge pasted on the outer wall of steel tube. The calculation stresses are smaller than the conversion stresses because of the surface friction of rebar by comparison, but the changing trends are the same, such arrangement and test method is proved to be feasible.
Study on the FRP Tendons in Acid Erosion Test of the Durability
Authors: Zhang Yun Feng , Han Fei Fei , Zhao De Wang , Shao Shuai
Published: June 2013

Abstract：In this paper,HCI solution in the chemical corrosion tests carried out in room temperature,measured mass loss of CFRP tendons. After extraction and analysis, preliminary search the FRP reinforcement corrosion mechanism under acid erosion. The tensile test is done at 60d and 120d,respectively. Determination of the tensile strength of CFRP tendons. The experimental analysis of the data collected, identify the law of CFRP reinforcement corrosion. Fiber reinforced composite material (Fiber Reinforced Polymer, of FRP ) is a continuous non-metallic fibers and fabric reinforced thermosetting or thermoplastic resin matrix composite made of a new material . Fibers and resin matrix composed of FRP bars under normal circumstances is not easy to rust, but in recent years, the study found that acid salt , moisture , UV , temperature and other environmental conditions on the long-term performance of FRP bars have a certain impact[3-5]. By CFRP tendons under acidic corrosion durability test study reveals CFRP tendons under the corrosive effect of the variation of the quality and strength . Can provide a theoretical basis for CFRP tendons durability design , to provide theoretical guidance to improve the efficiency of the FRP bars in harsh conditions .
H∞ Filtering for Markov Jump Systems with Mixed Modes
Authors: Lv Shu , Zhong Shou Ming , Ding Yu Cai
Published: June 2013

In this study, H_infinity filtering problem for a class of stochastic Markov jump systems is investigated. The system mode is assumed to be different from the delay mode. The aim of this paper is to design a mode-dependent filter such that the filtering error system is stochastically stable and satisfies a prescribed disturbance attenuation level. By using a mode-dependent Lyapunov functional, mixed mode-dependent sufficient condition on stochastic stability is formulated in terms of linear matrix inequalities. Based on the stochastic stability criterion, an H_infinity filter is developed.
Automatic Data Acquisition System in Wheel-Rail Monitoring Test Bench
Authors: Cao Yu , Huang Zhi Hui
Published: June 2013

A new automatic data acquisition method, which uses a combination of single chip microcomputer and data acquisition card, was applied in this system. Single chip microcomputer captured the signal of photoelectric switches and delivered the information to upper computer by serial communication. The velocity of the moving load was obtained by photoelectric switch signal. The data acquisition program of upper computer was written by MATLAB instrument control toolbox and data acquisition toolbox. The data acquisition function of data acquisition card was triggered by the upper computer automatically. Testing data show that this system could automatic collect data of test bench stably. This system also shows high efficiency and reliability.
Based on Block Averaging Pre-Processing Differential Coherent Integration Weak Signal Acquisition Algorithm
Authors: Dong Zhao , Niu Jing Shuo , Feng Ming He , Tao Xuan Ru
Published: June 2013

Aiming at the problem of signal attenuation seriously, a block averaging pre-processing (BAP) differential coherent acquisition algorithm is proposed. BAP algorithm can be used to suppress interference signals and improve the stability of the receiver, but it is still faced with navigation signal transitions problem. Differential coherent algorithm can compensate for square loss caused by non-coherent accumulation. Monte Carlo simulation experiments show that the algorithm is more effective in the same carrier-to-noise ratio and same data length conditions.
Comparing and Analysis of Schemes of Condition Monitoring for CNC Machine Tool Servo System
Authors: Han Jun , Chang Rui Li
Published: June 2013

Obtaining the condition monitoring signals by rule and line is the base of distinguishing accurately the machine tool condition. In the paper, the three schemes of obtaining machine tool condition signals are researched, which are build-in sensor, external sensor and servo drivers monitoring interface. The three schemes are all reliable signal sources, however, the quality and difficulty level to obtaining of signals are different. In the paper, the three schemes are compared and analyzed. It is important for researching the condition monitoring technology of CNC machine tool servo system and improving machine tools reliability and machining quality.
De-Noising Method of a Certain Missile Homing and Control Signal Based on Wavelet Transform
Authors: Du En Xiang , Wang Wei
Published: June 2013

Homing and control signal is important information which can reflect system performance and technical conditions of guidance system, and homing and control signal is one of core contents of guidance system detection, and de-nosing of the signal has an important meaning to the accuracy of guidance system detection and assessment. This paper introduces wavelet de-nosing method for the characteristic of homing and control signal and its noise signal.
Device Controller Design Based on the Internet of Things
Authors: Zhang Yi Wen , Jia Ji , Li Jing Ming , Cheng Jia Xing
Published: June 2013

With of the increasing application of high tech and information technology, wireless sensor network has already become one of the hottest topics. The SmartNet is to build an intelligent home network system. In SmartNet, the format of control string, the interpretation structure of driver, and the network manager protocol were designed. And the design can be divided into two parts: software and hardware. The hardware is mainly defines rules, while the software part is mainly interpret the driver of hardware, generate user interface of the device, and organize and send commands.
ECG Signal Denoising Algorithm Based on Optimization Wavelet Transform
Authors: Yuan Guo Shun , Geng Li Qing
Published: June 2013

Wavelet transform algorithm with its unique multi-resolution analysis and it is in the time - frequency domain has the advantage of the ability to characterize the local signal characteristics, let it has been widely used in signal detection, noise removal, feature extraction, image compression and so on. In this paper, on the basis of already wavelet transform ECG noise removal, proposed a median filter optimization algorithm, enables ECG noise removal effect is more obvious, also for the Eigen values detection of ECG lay a better foundation.
Integrity Protection of the Intelligent Robot's Remote Information
Authors: Deng Yuan Qing , Shi Hui , Gong Jing , Li Jia Yu
Published: June 2013

The remote information of the intelligent robot, especially the control information, has to be protected for integrity, in order to prevent the enemy or competitors from attack, such as manipulation and forgery. This paper uses the 3GPP integrity algorithm f9 to protect the integrity of the intelligent robot’s remote information, and uses FPGA to realize the hard core algorithm KASUMI of the f9, and gives an implementation example.
Localization of Magnetometer Sensor Based on Magnetic Gradient
Authors: Yu Zhou , Xiao Chang Han , Wang Huan , Zhou Guo Hua
Published: June 2013

An adaptive weighted approach based on magnetic gradient was proposed in order to localize the magnetometer sensor and correct magnetic measurement error caused by the position deviation. During the process of localization, the magnetic field produced by various combinations of current-carrying coils was calculated and analyzed firstly. The weighted factors of the objective function were determined on the basis of the magnetic gradient in the predetermined position of vertical magnetic sensors. Then the genetic optimization algorithm was applied to find the optimum of the function. An example of coil combination was analyzed and utilized. The simulation results show that the proposed method is effective to localize the magnetometer sensor, and it can be applied in engineering for its convenience and high accuracy.
Effect of Carbon Doped in BN on Thermodynamic Properties
Authors: Ao Jing , Ding Ai Ling , Li Chun Mei , Li Feng , Wang Jin , Chen Zhi Qian
Published: June 2013

The thermodynamic properties of (B1-xCx)(N1-xCx) (x=0, 0.25, 0.5) are calculated by the ultra-soft pseud-potentials within local density approximation in frame of density functional theory with virtual crystal approximation and using the quasi-harmonic Debye model. The normalized relative volume V/V0, bulk modulus, thermal expansion coefficient α and heat capacity were computed with different temperature and pressure. Meanwhile the lower limit of the thermal conductivity κmin is also examined in details.
Multi-Step Ahead Prediction for Electromechanical Device Using Multivariate SVM Predictor
Authors: Zhang Zheng Kai , Gu Li Chen , Zhang Ping
Published: June 2013

Electromechanical device driven by motor plays a crucial role in the operation of modern industry. A reliable time series predictor can be a very useful tool in the field of Condition-Based Maintenance (CBM) to forecast the behavior of motor. This paper presents an approach to predict the operating conditions of motor based on support vector machine (SVM). In order to improve the accuracy of prediction, a multivariate SVM predictor is built using multi-source multi-attribute information for time series prediction. The advantages of the multivariate SVM predictor is verified by empirical results derived from a real system of motor in power plant.
Remote Control Technology in Intelligent Oil-Well Based on Acoustic Wave
Authors: Wang Yan Song , Chen Lei , Zu Shi Qiang , Zhang Bao Hui , Wu Gang , Guo Ji Min , Cui Jin Bang , Hu Wei Li
Published: June 2013

In this paper, we investigate an acoustic remote control technology through the annulus channel in an oil-well. To establish a reliable communication, we first evaluated the acoustic charateristic of the aunnulus channel through field experiments. Then, a remote control system was implemented with a ground equipment serving as an acoustic source, and an underground equipment used as a receiver. A demonstrative experiment, in which we succeded in remoting an intelligent valve over 1257 m, has been presented to verify the proposed technology.
Research and Exploration of Carbon Dioxide Concentration Real-Time Monitoring System Based on Freescale MCU
Authors: Liu Hai Tao , Wu Tao , Chen Nan
Published: June 2013

This project put forward a kind of new low-cost real-time monitoring system of carbon dioxide. First, this equipment guides the gas into the device of chemical reaction by using step motor and measures the change of the gas’s volume which is guided into the device of chemical reaction after the reaction between the CO2 and NaOH by using the data-acquisition unit. Then, it processes data with Freescale MC9S12XS128 MCU and calculates the concentration of the CO2, in the meantime sends the data to the PC system by APC220V 3.0 wireless module, then using PC system makes the real time control over the concentration of the CO2 come true. Finally, detecting concentration accurately and steadily is achieved.
Research Progress of Solar Auto-Tracking System – Solar Hybrid Tracking Mode
Authors: Wang Lin Jun , Men Jing , Shao Lei , Zhang Dong , Liu Wei
Published: June 2013

Making the best of solar energy is an important way for human beings to solve energy shortage. Although solar energy is the ideal alternative energy source, its disadvantages, such as low density, intermission and no change of space distribution, not only make it difficult to be collected and used, but also give a higher request to the tracking control system. In order to solve the problem of low utilization ratio of solar energy, it is significant to improve the precision and stability of the tracking system. This paper introduces the working principles and characteristics of the open loop, closed-loop and hybrid tracking mode firstly, the design of hybrid tracking control system is presented next. The solar hybrid tracking mode integrates the advantages of open loop and closed-loop tracking mode, and it can solve the problem of sensor tracking mode which cannot work in the cloudy day and the problem of program tracking mode which exists the accumulation error. As a result, it keeps higher precision and stability under all-weather conditions, and has a broad prospect.