bluuebunny/crossref_metadata_2025 huggingface dataset:
Regeneration Strategy of Waste Limestone Mines in Dalian City
Authors: Zhang Yu , Dong Li
Published: October 2013

China is experiencing a rapid economic development and large-scale urban expansion. The mining waste land is becoming an obstacle in that development. This article summarizes the current strategies that China is using to solve this problem and takes the transformation of limestone mines in Dalian City as the example to introduce how did local governments, enterprises, schools and other aspects make many efforts for this. At the same time, the article also tries to give some new solutions from the angle of sustainable urban planning, through the ongoing relating international exchange program (United research method of interdisciplinary and culture).
Impact of Land-Use Change on Grassland Carbon Stocks: An Overview of the Literature
Authors: Wang Lian Kuan , Lian Pei Yong , Fu Yun Jiang
Published: October 2013

Terrestrial vegetation and soils in the terrestrial biosphere play an active role in shaping the environmental systems of the Earth. An improved understanding of changes in carbon storage of terrestrial ecosystems is very important for assessing the impacts of increasing atmospheric CO2concentration and climate change on the terrestrial biosphere. Accurately predicting terrestrial carbon (C) storage requires understanding the stock and storage potential of C, because it helps us understand how ecosystems would respond to natural and anthropogenic disturbances under different management strategies. Grasslands are important for global carbon balance both for their large area and significant sink or source capacities, depending on the factors of climatic and land-use. Land-use change is often associated with changes in land cover and carbon (C) stocks. Land-use and land cover strongly influence carbon (C) storage and distribution within the grassland ecosystems.
Volatile Components of Sindora glabra Leaves
Authors: Chen Yi Ping , Ji Sha Sha , Liang Zhen Yi , Zhang Jun Feng , Lin Zhao Hua
Published: October 2013

The ethyl acetate extract was made from the leaves of Sindora glabra by solvent extract method and silica column chromatography, and was analyzed by means of gas chromatography-mass spectrometry. The results show that thirty-four peaks were observed, in which twenty-eight compounds were identified accounting for 93.40% of the total volatile substances detected. The major constituents are Hexadecanoic acid, ethyl ester (12.77%); (1.alpha,4a.alpha,8a.alpha) -7-methyl-4-methylene-1-isopropyl -,1,2,3,4,4a,5,6,8a-octahydro naphthalene (11.95%) and 1,2-Benzenedicarboxylic acid, butyl 2-ethylhexyl ester (11.10%). The main types of compounds are fatty acid esters (44.46%) and terpenoids (25.39%). And most of the terpenoids are sesquiterpenoids which accounted for 23.44% of the total composition.
The Introduction Seedling Experiment of Four Varieties of Poplar
Authors: Wang Lian Kuan , Lian Pei Yong , Fu Yun Jiang
Published: October 2013

We introduced the four varieties poplar to Inner Mongolia Daxing’anling Forest Region, and investigated the survival rate of seedlings, ground diameter and seedling height were measured, and calculated average ground diameter and seedling height. In different experiment areas, the results showed that, the growth influence of seedling height and ground diameter was not the same on different cutting densities. Based on the above results, it can be preliminarily determined the most suitable poplar and cutting density for this area.
Analysis on Fast-Growing Black Poplar Branch Used as Raw Materials for APMP Pulping and Papermaking
Authors: Wu Qin , Chen Hong Lei , Wang Bao Bin , Cao Bei Bei
Published: October 2013

Fiber morphology, chemical composition and wood characteristic of fast-growing black poplar branch were studied. Meanwhile, pulping performance of it used for alkaline peroxide mechanical pulp (APMP) was discussed preliminarily. The research results showed that the fast-growing black poplar branch can be used as raw materials for APMP pulping and papermaking.
Study on Error Analysis of On-Line Measurement System Based Numerical Control Process
Authors: Ren Hai Dong , Peng Er Bao
Published: October 2013

The error analysis of the on-line measurement system used in the processing parts of numerically-controlled machine is investigated, and the image processing technilogy is analyzed through the investigations on error source, error analysis and geometrical error analysis, in which, much consideraton is paid to the image treatment and the object margin extracting process conducted to the images segmented and disposed in terms of image preprocessing and segmentation. Therefore, such an investigation is of great importance to enhance the machining precision of parts.
Experimental Study on the Parameters of Service Life of Rolling-Bearings
Authors: Hao Wen Si
Published: October 2013

In this paper, vibration information of rolling bearings under 5 working conditions, including normal bearings, bearings with wear and tear on the outer circle or running pulley and so on, are collected. Obtained the relationships between parameters of service life of bearings and changes of time, such as the amplitude range, the frequency domain, and the energy around wavelet packets. Summarized a more detailed regular pattern for bearings wear and tear.
Grinding Spindle Improvement Based on Structure Optimal Design
Authors: Fu Pei , Huang Jiang , Jin Ming Zhong , Gong Min Qing , Pan Xue Ni
Published: October 2013

For the structure optimization design of grinder Cui Zhong etc. [1,2] studied problems such like to select sample points which are used to structure the approximate model, to apply optimal Latin hypercube principle in the experimental design, and to take advantage of radical basis function. To minimize error they optimized models by using mathematical programming also. In our paper here using the methods in [1, we construct a model using CAD for grinding components, on the basis of optimum structural design procedure we deal with grinding spindle with structural analysis, sampling point selection, and optimum design, such that we greatly improve the design of high-speed grinding spindle on the wheel frame of CNC8312A[.
Chlorine Salt to Sea Sand the Influence of Concrete Compactness
Authors: Yuan Wei Jing , Liu Jun Zhe
Published: October 2013

The application of Sea sand concrete, to solve the problem of affecting the durability become focus. Chlorine salt is sea sand concrete part. Based on cement, fly ash, sand, the desalination sea sand as experimental material. In were magnified 100 times, 1000 times and 8000 times of HCA0 (blending 0.01% chlorine ion without fly ash concrete), HCB0 (blending 0.03% chlorine ion), HCC0 (blending 0.06% chlorine ion) and HCD0 (blending 0. 1% chlorine ion) 28 days instar glue sand internal scanned , Using XRD analysis method, the chlorine salt to sea sand concrete microscopic morphology compactness was studied. The results of the study show that the microscopic morphology observation, chlorine salt to sea sand concrete compactness impact is not big, but chlorine salt can improve the compactness of concrete.
Analysis of Evacuation Efficiency Based on Properties of Construction Materials with Seven Popular Space Combinations in Architecture Design
Authors: Xu Hong , Duan Peng Fei , Huang Ya Long , Zhan Xia Bin
Published: October 2013

How to evaluate the influence of the architecture space combinations effected by the properties of construction materials on the evacuation efficiency is an open and important question to the digital architecture research community. Few research works have been done to investigate the influences. This paper proposed a space-time use efficiency index to evaluate the use efficiency of space and time resources in the evacuation of the public buildings. Then, this paper evaluated the influence of the architecture space combinations on the evacuation efficiency by using the three indicators, namely, the evacuation time, evacuation distance and the proposed space-time use efficiency. The evacuation efficiency performance of the seven popular architecture space combinations which could be constructed different materials were tested by an implemented experimental system prototype, and their advantages and disadvantages were compared to draw a meaning suggestion in the architecture design.
Finite Element Analysis of Continuous Curved Box-Girder Bridge
Authors: You Qi Yong
Published: October 2013

The calculations of plan truss and beam-girder method on straight bridge were analyzed, which determined right beam-girder method calculation model of the box-girder bridge. Based on this model, the different radius continuous curved box-girder bridges were simulated by finite element, and then the internal forces of the bridge were obtained. The calculations of inner beam and outer beam show the change rule of internal force and bridge radius. The reasonable calculation methods of continuous curved box girder bridges are obtained, which can offer help to the bridge designers.
Effect of Type and Dosage of Activators on Strength of Repair Concretes
Authors: Xue Long Fei , Xu Jian Le , Yi Jue Fei
Published: October 2013

The different effect of chemical activators on mechanical properties and microstructure of cement-base repair materials were investigated. The microstructure of repair concrete was also analyzed by using scan electronic microscope (SEM). Test of mechanical properties indicate that the optimum chemical activator suitable to repair concrete with nearly 30% mineral materials replacement of cement is the type J-B, and the optimum addition is 5% dosage by weight of binders. The presence of chemical activator J-B increase the early strength and exert significantly advantageous affect on the later strength. Measurement of microstructure indicates that the surface of fly ash particle can be seen obvious pozzolanic reaction, and this is due to the presence of chemical activator which accelerate the pozzolanic reaction and densify the mortar pore structure.
Research on Carbon Fiber Composite Materials and F1 Racing Automobile Design
Authors: Yin Hai Tao , Lang Ming Mei , Zhao Yun Na
Published: October 2013

Composite is composed of two or more materials and its main performance is significantly different from that of each material constituting it. Each material has an appropriate quality proportion. This paper summarizes performance features of carbon fiber composite, introduces the use and development history of composite in F1 automobile race, analyzes the structural design and manufacturing process of composite in F1 racing automobile and puts forward the performance of carbon fiber composite to be improved in F1 racing automobile.
One-Dimensional Chained Polymer Constructed by 3-Indolepropionic Acid and 2,2'-Bipyridinium
Authors: Wang Li Hua , Ji Zhi Xiang
Published: October 2013

The crystals of one-dimensional chained polymer constructed by 3-indolepropionic acid and 2,2-bipyridinium have been synthesized by evaporation from ethanol solution. The crystal structure of one-dimensional chained polymer was determined by X-ray single crystal diffraction analysis. The results shows that the polymer belongs to monoclinic, space group P2(1)/c, a = 5.2557(11) Å, b = 12.249(2) Å, c = 21.467(4) Å, V = 1380.1(5) Å3, Z = 2, Mr = 531.58, De = 1.279 g/cm3, T = 293(2) K, F (000) = 558, R = 0.1136 and wR = 0.3376. The compound forms one-dimensional chained polymer through hydrogen bonds. 3D network structure was constructed by the interaction of the one-dimensional chained polymer.
Mechanical Design and Study on Showing Platform of Rotation and Vertical Reciprocation
Authors: Jiang Xiao Wei , Du Qiu Lei
Published: October 2013

In view of well- designed showing platform is advantageous to promoting exhibition effect, the author analyzes the developing course of showing platform, and combining the mechanical design problem of existing showing platform which exists in using function, art function and material technique function and others, discusses the mechanical design requirement, the fundamental structure and working principle, the shape design and the color design of showing platform of rotation and vertical reciprocation. Among them the fundamental structure and working principle mainly elaborate the constituent parts of showing platform, the structure characteristics and working manner. Then the possibility is analyzed. On this foundation, the practical application of showing platform of rotation and vertical reciprocation is analyzed.
Analysis of Fatigue Damage for Offshore Wind Turbine Substructure
Authors: Wang Bin , Li Ying , Luo Jin Ping , Wang Dan Shan , Zhao Sheng Xiao
Published: October 2013

Based on the probability distributions of wind direction and wave direction, the fatigue load is applied to the offshore wind turbine structure according to the actual environmental loading direction. The deterministic fatigue damage due to the wind load and the spectrum fatigue damage due to the wave load are calculated, respectively. Then, the total fatigue damage of the offshore wind turbine structure is obtained by the linear superposition. Compared with the results that the fatigue damage of the offshore wind turbine structure is computed under fatigue loads exerted in single direction, the results of omnidirectional fatigue analysis are more reasonable.
Research and Design of Walking Mechanism of Robot and the Parameterization Modeling Based on the UG
Authors: Wang Hong Ying , Peng Er Bao
Published: October 2013

The paper introduced image processing technology based on image segmentation about on-line threads images, and describes in detail image processing technology from mage preprocessing, image gmentation, and threaded parameter test. Threaded images of on-line processing parts obtained are introduced as the key technology, Target edge extraction process from the segmented image are also recounted. At last, this article shows a comparison between actual machining parameters of screw thread and the standard parameter , provides the criterion for error compensation.
The Study of the Parameterization of the Drum Brake Design Based on UG
Authors: Liu Hong Pu , Peng Er Bao
Published: October 2013

This text apply UG software to the design and study on the type parameter of the brakes. On the basis of the principles of discretization, discretize the structural pattern of the brake drum. select the typical characteristic of the brake assemblies and the individual parts of the 3d parameterization modeling work, to build a model for parameterization library calls.
Study on Profile Design and Analysis of Screw Expander
Authors: Liu Guang Bin , Yang Qi Chao , Wang Le
Published: October 2013

The profile is the foundation of designing a screw expander and its characteristic influences the performance of a screw expander. In this paper, some parameters of profile influenced by the center distance, number of teeth and teeth depth of female rotor are analyzed and the considerations is proposaled as a expander is designed. The length of contact line increases with the center distance and the teeth depth of female rotor but decreases with the tooth number of female rotor. The relative area of leakage triangle decreases with the center distance and the teeth depth of female rotor but increases with the tooth number of female rotor. The ratio of length to diagram of male rotor decreases with the teeth depth of female rotor but increases with the tooth number of female rotor. The Area utilization factor increases with the teeth depth of female rotor but increase with the tooth number of female rotor. The angle of suction process is smaller than the discharge one, so the area of suction port is very important for a screw expander in order to reduce the flow resistance.
The Analysis of Motion Characteristics of Variable Forward-Swept Wing Mechanism with a Double Slideways
Authors: Su Xin Bing , Zhou Zhou , Wang Xu , Shi Jing Cheng , Chen Peng
Published: October 2013

Based on the variable forward-swept wing configuration, this paper utilized a variable forward-swept wing mechanism with a double slideways, which make it possible for the aircraft to switch among orthogonal wing, forward-swept wing and delta wing freely. The general configuration of the variable forward-swept wing mechanism with a double slideways was elucidated by means of a three-dimensional model plot and then the mathematic simulation model was also established. The motion characteristics of linear motion were simulated, analyzed and optimized. The results indicated that the variable forward-swept wing mechanism with a double slideways can meet the aerodynamic requirements better. Moreover, there exists great linear relationship between the position of nut and the wing forward-swept angle. Therefore, this mechanism may serve as a useful reference when developing a morphing aircraft.
Kinematics and Workspace Analysis of 3-RPP Parallel Mechanism
Authors: Xie Zhi Jiang , Zhang Jun , Liu Xiao Bo
Published: October 2013

This paper designed a kind of parallel mechanism with three degrees of freedom, the freedom and movement types of the robot are analyzed in detail, the parallel mechanisms Kinematics positive and inverse solutions are derived through using the vector method. And at last its workspace is analyzed and studied systematically.
Design and Simulation Analysis of Compost Pallet Transfer Device of Agaricus bisporus Factory Cultivation
Authors: Zhao Wu Yun , Yang Jie , Tang Xue Peng , Dai Fei
Published: October 2013

In order to transport the agaricus bisporus compost pallet in factory production, Agaricus bisporus compost pallet transfer device was designed, This device had advantages of simple structure and perating reliably and easy to control and so on. It could be able to replace artificial to complete ascension and translation and devolved operations of the agaricus bisporus compost pallet in the cultivation of mushroom house, realized the pallet transport. To introduce the transfer device of agaricus bisporus compost pallets structure and working principle. Which used software of the solidworks for 3D modeling,used software of the Adams to the system for motion simulation, get pallets simulation curve of the location and space trajectory, Verify the performance of the system, For optimization and control of the system actual movement provided an important reference.
The Design of Nanoscale 3D Precision Displacement System
Authors: Deng Xiao Wen , Chen Yu Rong , Dan Bin Bin , Wang Sheng Huai
Published: October 2013

A large travel nanoscale 3D precision displacement system is designed with a two-stage coarse-fine driving pattern. Its coarse driving is completed by PID adaptive controller that controls the servo motor and precise ball screw to drive a 1D table, and the fine driving is realized by PZT (piezoelectric microdisplacement actuator). Program control method is adopted to realize the matching of micrometer and nanometer lever driving. A traceable measuring system based on MIP (the Michelson Interference principle) is designed and used to detect positioning, which reduces the accumulated detection error. Experiments verify the effectiveness of the displacement system.
Design and Dynamic Simulation for Hydraulic Support
Authors: Li Dong Min , Tan Yong Hai , Xu Rui Yin , Yuan Jian Jun , Li Bao Yin , Huang De Jie , Jia Ting Li
Published: October 2013

The whole structure of a new hydraulic support is designed according to the special working conditions, and the main parameters on its structure and dimension are calculated based on the whole structure and the corresponding formula about the structure design of hydraulic support. The entity of the new hydraulic support is modeled with Pro/E, and the whole assembling of hydraulic support is accomplished based on the former structure and dimension. Thus the dynamic simulation based on the entity model is done with Pro/E given the simulation data derived from the actual working status, and the screen shot of 3 key time nodes among the whole movement process is got, finally the simulation results prove that the design and three dimensional model are correct and available.
Research on Adaptive Learning Control Strategy of Daul-Cylinder Synchronous Hydraulic System
Authors: Zhao Guo Hua
Published: October 2013

In allusion to the system that there is but only severe time-varying and non-flexible coupling between the two hydraulic channels, the daul-cylinder hydraulic synchronous movement servo control system is designed for large die casting equipment, and its control model is establish. By guiding thought of self-learning control strategy, two levels of speed control scheme is adopted in the hydraulic system, namely the level adjustment and secondary servo compensation adjustment. On the basis, adaptive learning control scheme is established. Thus, its control strategy algorithm of incremental form is presented. Finally, through MATLAB(R2010a), the simulation analysis has been carried on to the system, the emulational results show that the control scheme can make the system to achieve excellent performances of synchronous movement.
Kinematics Analysis and Simulation on Hydraulic Efficiency Manipulator
Authors: Liu Yong Xia , He Zhi Feng , Zhao Rang
Published: October 2013

On the basis of calculation, kinematics analysis and simulation were carried out on a hydraulic manipulator by using the positive solution of manipulator's position. The calculation results can be intuitive to inspect the kinematic characteristics of the manipulator structure, and provide the basis for the design of the control system.
Combining Ontology and Retrieval in Case-Based Reasoning for Heavy Industry Machinery Design
Authors: Zhang Hong Lei , Ge You Hua , Xia Jian Sheng , Huang Xiao Feng
Published: October 2013

The efficiency of design has significant impact on the overall lead time for the new product of heavy industry machinery. Case-based reasoning (CBR) can be used to heavy industry machinery design for improving the effectiveness of design. However, CBR is short of flexibility to cope with the semantic retrieval, which is the main cause of the decline in the efficiency and accuracy. Confronted with the problem, the approach has been developed based on the combining ontology and retrieval in case-based reasoning for heavy industry machinery design. Through incorporating ontology with CBR, the paper provides a flexible and comprehensive operation. An example case study of rotary drilling rig demonstrates the potential which the proposed method is more effective to retrieve cases on the semantic level.
Thermal Design of Power IC Chip Based on Icepak
Authors: Pang Li Fei
Published: October 2013

There was a thermal model established for the packaged power IC chip which is usually used in the design of a class amplifier. After the theoretical analysis of the equivalent chip thermal resistance model carried out on the basis of thermal resistance theory, the optimization and calculation of the baseboard's material and thickness were simulated with Icepak. The acceptable thermal structure of was showed as suggestions for the reliability of chip with discussions of the simulation.
Large-Size Wheel Rotary Forging Process Research
Authors: Li Jian , Sun Hui Xue , Wang Li Mei , Tao Mu Hua
Published: October 2013

For forging process of the large size alloy wheels have several disadvantages, such as using large tonnage presses, high energy consumption, etc.So rotary-forging process route is developed. Forgings forming require 5000-6000T presses by the traditional process, but only require 350T rotary forging presses by new technology. This new process reduces the production costs and energy consumption and extends the life of die. Investigate the effect of several key factors on the forming force. The results show that forming force decreases with the decrease of press amount per turn, and reduce with the die and bars temperature increases. Forging wheel window has small influence on the forming force, but can decrease the forgings cutting weight, improve material utilization. This study plays a guiding role for equipment R & D and determination of the production processes parameters.
The Study on Linear Guide Precision Straightening Stroke Prediction Quick Algorithm
Authors: He Ling , Hong Lu
Published: October 2013

In order to improve the calculation speed and precision of the linear guide precision straightening stroke algorithm, a novel way to predict straightening stroke is proposed based on springback control theory. The relationships between straightening springback control and straightening stroke have been constructed by having analyzed on the curvature changes of the straightening process. The straightening stroke prediction quick algorithm has been designed and applied in straightening experimental. After comparison on the stroke-deflection model and experimental, it is proved that the springback control model can improve the speed and real-time of straightening stroke prediction and calculation and have good adaptive capacity in a large bending condition.
Research on Modeling and Simulation of the Trafficability of Vertical Screw Conveyors Intermediate Support Based on EDEM
Authors: Mei Lei , Hu Ji Quan , Li Yong Zhi , Chen Tian Pei
Published: October 2013

Vertical screw conveyor is a kind of main equipments of bulk handing and delivery, and the intermediate support structure is one of the key parts of this equipment. It is necessary to make a research on it for improving the design and optimization to improve bulk delivery efficiency. Degree of freedom theory, analysis software of EDEM with discrete element and setting periodic boundary model are applied in this paper to simulate the vertical screw conveyors grain (rice) delivery process under different intermediate support structure. The results show that traditional intermediate support structure is three times statically indeterminate structure, while the degrees of freedom of new intermediate support is 1; The vertical screw transmission capacity of new type of vertical screw axis machine which uses intermediate spokes structure is slightly decreased, and the driving power required to drive screw axis increases slightly at the same time. The materials axial transport speed is not affected, but the requirement is greatly reduced for the manufacture and installation accuracy.
Safety Assessment and Remaining Service Life Prediction of Sandwich Marine Air Bottles
Authors: He Guan Jun , Diao Ai Min
Published: October 2013

Based on the fatigue failure analysis of marine air bottles, the research on the safety assessment and remaining service life prediction is conducted in this paper. Particularly, the method of sandwich evaluation is obtained via sandwich characterization and the formula to calculate the fatigue crack growth rate is obtained via fatigue crack testing: three typical types of sandwich on marine air bottles are investigated, and the corresponding safety assessment results as well as the critical sandwich size are obtained. It is seen that the theoretical formula is valid, and that the air bottle can be safely used till next cycle as long as the initial sandwich angle depth less than 10°.
Study on the Test of Pulse Laser Processing of Brittle Materials
Authors: Liu Ping Ping , Wei Long
Published: October 2013

Texturing processing experiment of SiC and YG8 surface was done by using lamp-pumped YAG-T50 laser marking machine and the depth of groove and the surface roughness was measured by using PS50 measurement which is non-contact. Through experiment, process parameters, such as effective vector step, effective vector step delay, Q frequency, laser current, effecting on the quality of the micro-shape processing were been researched. The experimental results show that, when effective vector step delay or laser current increases, the depth of the helical groove increases;while effective vector step or the Q frequency increases, the depth decreases;the surface roughness value decreases along with increasing of effective vector step delay Q frequency and laser current, increasing when effective vector step increases.
Assessment of Aging Properties of Anti-Scratch Coatings by Nanoindentation
Authors: Zhang Xuan , Zhong Yan Li , Zhang Xiao Wen , Li Lei , Yan Yue
Published: October 2013

The assessment of aging properties of organic coatings on plastics is critical to the using safety and service life evaluation. This paper was dedicated to evaluate the aging properties, including humidity-heat and temperature shock tests, of various anti-scratch silicon coatings deposited on polycarbonate (PC) by adhesion and nanoindentation measurements. Adhesion behaviors through conventional cross-cut and tap peel tests reveal that there are no obvious changes of these coatings after aging experiments, all ranked as 5B. However, the changes of nanomechanical properties (elastic modulus and hardness) of coatings on PC after aging tests are obvious different for these coatings. Base on these results, it is proved that nanoindetation technique could be an available method to assess aging behaviors of thin coatings.
Research on the Performance and Process of Fe/Cr-V – WC Surfacing Welding Layer on Weapons Parts Department
Authors: Liao Xue Bing , Zhou Ren Bin , Ming An Qing , Quan Zhen Zhong
Published: October 2013

In this paper,a Fe/cr-v - WC flux-cored wire welding alloy which used in weapons parts wear surfacing is developed. By the analysis of the average hardness of surfacing welding layer, the wear weightlessness and the microstructure, the wear resistance properties of surfacing welding alloy is studied. And the cored in alloying elements Cr, WC, Mo and V on the influence law of hardness and wear resistance of surfacing welding layer are systematically discussed, So as to the best alloy element content in the cored is determined. Results are showed that Cr element content is 5.5% ~ 5.5%, the content of WC powder is 3.9% ~ 4.2%, at 1.6%, content of Mo element V element content is within 3.2%. with the Fe/Cr - WC flux-cored wire welding alloy ratio appropriate, weapons parts welding layer has good hardness and abrasion resistance.
Research Progress of Phase Change Materials on Heat Transfer
Authors: Ma Feng , Qin Yan
Published: October 2013

Energy storage plays important roles in conserving available energy and improving its utilization, since many energy sources are intermittent in nature. Energy storage, in particular the thermal energy storage becomes increasingly popular and technically attractive as one of the possible solutions for energy conservation and leveling of energy demand patterns. Because of advantages of high energy storage density and nearly constant temperature in phase change process, phase change materials (PCMs) have been becoming one of the key researches. This paper reviews the application of PCMs on heat transfer and the development trend in future is prospected. In view of the problem of low thermal conductivity, some heat transfer enhancement methods on PCMs are reviewed, such as adding mental, fins, graphite, carbon brushes, etc.
Numerical Simulation of Aluminum Alloy Welding for Butt-Joint of AA2024 Considering Surface Effect Element
Authors: Zhu Wen Feng , Wang Jie , Lin Pei Jian , Zhang Bing Yang
Published: October 2013

Aluminum has higher conductivity, convection coefficient, and oxidability, which casuse low plasticity in high temperature compared to convectional low carbon steel. These properties make its welding numerical simulation much more difficult. Thermal simulation is the foundation of aluminums coupled calculations of thermo-elasto-plastic for welding. In this paper, a butt-joint of aluminum AA2024-T3s welding is numerical modeled based on surface effect element. And bilinear kinematic hardening is used to take into the Bauschinger effect. The simulation results agree well, which shows that node temperature calculation can be improved by this method.
Research Progress of Plasma Nitriding in Low-Temperature for Austenitic Stainless Steel
Authors: Wu Yun Xia , Wang Hu , Yu Xiao Hua , Zhan Zhao Lin
Published: October 2013

In recent years, as a kind of heat treatment methods to improve the performance of the material surface, plasma nitriding gets more and more widely used. Among some new ways of plasma nitriding, treating of surface nano-crystallization before plasma nitriding has been more and more attractive. This technology is also applied to stainless steel on plasma nitriding in low-temperature, for it can not only improve the hardness and wear resistance of material surface, but also enhance corrosion resistance. In the article, several assistive technologies about plasma nitriding in low-temperature are described, including surface nano-crystallization, laser surface strengthening and pre-oxidation. Meanwhile, proposes that the further research will focus on the surface nano-crystallization before plasma nitriding in low temperature in the future.
Recognition and Control of the Influence Factors on the Surface Defects of Cold Rolled Strip with Emulsion Lubrication
Authors: Li Yan , Sun Jian Lin
Published: October 2013

In cold rolling, good surface quality should be maintained with the requirement of constant increasing productivity. Oil-in-water (O/W) emulsions are widely used in cold rolled strips due to their good characteristics as lubricants and coolants. The strip surface defect is one of the central quality problems in the rolling process. A poor strip surface quality after cold rolling may have a large impact on the downstream process, like annealing, galvanization and painting. The surface condition could be deteriorated in many forms affected by various factors. However, few reports focused on the effect of the lubricating property of emulsion on the final surface quality. In this paper, the general surface defects of cold rolled strips such as watermark defects, black spot defects, heat scratches and corrosion defects were analyzed by scan electron microscope (SEM) and energy spectrum analysis (EDS) and the morphology and composition of the defects have been researched. The reason of the surface defects generated is analyzed, and the factors which introduce the surface defects during rolling process are presented. Therefore, it has an important significance to identify the features of the surface defects and put forward the solution measures.
The Effect of RE on the Microstructure and Properties of Weld of 7075 Aluminum Alloy
Authors: Li Lian Jie , Huang Xu Ren , Wei Hua Kai
Published: October 2013

In this paper 7075 aluminum alloy is studied as the object, through adding different percentages of the rare earth elements expecting to optimize alloy formula and find the optimal dosage of rare earth in order to improve the microstructure and properties of weld. The results show that when the rare earth content reaches 0.3%, alloys tensile strength comes to 388.39 MPa, and extensibility 18.22%. Compared with the control group, tensile strength is increased about 8.4%, extensibility about 14.7%, and the integrative mechanical performance is optimal. Metallographic research shows that accession of rare earth elements have perfect refinement effect to the microstructure of 7075 aluminum alloy and can improve the quality of weld.
Numerical Study on Compressive Properties of Mineral Composite Material
Authors: Li Peng , Ji Zhong , Liu Ren
Published: October 2013

The compressive properties of mineral composite material (MCM) are simulated by finite element (FE) method. A meso-scale 2D FE model for MCM specimen was established based on the real shapes of aggregates and their distributions in the matrix. Quasi-static compressive load was then exerted on the model, supposing no debonding exists between the matrix and aggregates and no failure occurs on their interfaces. Comparing the simulation with experimental results, it is found that the simulated stress-strain curve agrees well with the experimental one. It proved that the way for simulating compressive properties of MCM in this paper is very effective.
Design and Realization of Automatic Control System in Process of Plasma Extraction
Authors: Ren Wei , Wang Yan
Published: October 2013

The temperature is an important technical index of the plasma extraction process, which directly affects the quality of plasma products. This paper describes the key technology of temperature monitoring and control system, the system design ideas, hardware structure, and software function. The system uses PID control theory. It can monitor 46 temperature points and control the temperature. This system has been successfully applied to Tangshan Huakai Biological Technology Co., Ltd.. The practice shows that the system has good performance, and identified by Tangshan Institute of Metrology and Measurement.
A Review of Dynamic Fluid Level Detection for Oil Well
Authors: Jia Wei , Zhou Wei , Li Tai Fu
Published: October 2013

It is of great significance for analyzing well supply capacity, determining the reservoir pressure and thus enhancing oil production rate to detect dynamic fluid level depth for oil well. How to detect the fluid level depth accurately is the difficulty of the current study, based on the issue that hitherto detection of dynamic fluid level depth is not precise enough. Plenty of technical personnels have tried to solve this problem by various kinds of methods. In this study, we illustrate several approaches to determining the fluid level in a dynamic environment. This paper presents a review of dynamic fluid level detection for oil well. Moreover, this review will provide an overview of the potentially detection method of dynamic fluid level for oil well.
Research on Technology of Building Three-Dimensional Geological Simulation Model by Octree Algorithm Method
Authors: Wu Shuo Mei , Wang Yan Kun , Song Jian Wei , Liu Xu Ning
Published: October 2013

Accurate terrain data should be obtained in order to research geological structure modeling problem, and it is difficult to truly reflect the form of three-dimensional geological body by traditional three-dimensional spatial data model method. By taking geological structure modeling problem as research object, this paper analyzes geological modeling principles, builds the volume element model of octree subdivision algorithm, proposes to build a three-dimensional geological body by octree subdivision algorithm based on multi-scale, meets the needs of multi-scale organization of data as well as multi-scale division of geological bodies and attributes based on the geological object expression of octree subdivision algorithm, establishes the links between various geological objects through spatial volume element, lays a good foundation for spatial analysis and provides data support for the three-dimensional visualization of geology. The results of simulation experiment show that the proposed geological modeling method through octree subdivision algorithm is accurate and efficient, and it can adapt to the construction of three-dimensional complex geological model under common complex geological conditions and reflect the true form of three-dimensional geological body.
Structural Analysis and Design of Pre Heating Automotive Control System Based on AVR
Authors: Zhu Jing Bo , Wang Jing Yan
Published: October 2013

ATmega8 of AVR chip was used in the automobile pre-heating control system. Automotive pre-heated working principle was analyzed. The system of the pre-heater was designed and the hardware composition of the heating system, the structural features and the role of each module was introduced. It was expounded the process control including the heated air intake phase, to the oil phase, ignition phase and work phase. At last, the advantages and disadvantages of the pre-heater were introduced.
Anti-Control of Discrete Chaos Based on the Oblique Wave Feedback Control
Authors: Yang Zhi Hong
Published: October 2013

In this paper a method is proposed to anti-control the discrete chaos. When the control gain meets the certain conditions, the common discrete system occurs chaotic behaviors in the sense of Li and Yorke under the oblique wave states feedback control. Using Matlab to simulate one and N-dimensional discrete linear systems, the numerical results demonstrate the validity of the control algorithm.
The Simulation of the Novel SCRLH Transmission Line Structure Bandpass Filter
Authors: Tang Xin Kun , Guan Ya Lin , Wan Lin Bin
Published: October 2013

Based on the above analysis, the methodology of synthesizing bandpass filter by utilizing the novel structure is further proposed, which is then adopted to design a bandpass filter with the center frequency located at 6.45 GHz and the fractional bandwidth of 85%.
Research on Process Planning for the Job Shop Scheduling Integration
Authors: Liu Xiang De , Zhang Yi , Li Yan
Published: October 2013

For the problem of integration between process planning and job shop scheduling in CIMS, a new process planning method based on the process tree is proposed in this paper. Characters of process-tree, basic model and combination model of process-tree are defined in the paper. In addition, virtual process and redundant process path of the process-tree are also introduced, which are used to extend the scope of process-tree utilization. Through the comparison with ALPS (A Language for Process Specification) and AOS, advantages of the process-tree are shown.
Photoacoustic Measurement and Experiment of Glucose Concentrations in an Aqueous Matrix
Authors: Liu Guo Dong , Dong Jian , Ren Zhong , Zeng Lv Ming , Xu Hao
Published: October 2013

In the near-infrared region, we can test the blood glucose by non-invasive method. Based on this theory, combined photoacoustic principle, we had research about the simulated samples of blood glucose, measured the concentration of glucose solution. We have discussed the optimal wavelength in the near-infrared region (780-2400nm), and did the experiment repeatedly, and then analyzed data through the linear, polynomial and exponential fitting of the Generalized Least Squares, the measuring accuracy of the glucose solution had improved. These research results provide the guidance on the practice and experimental evidence for the further research of measuring.
Research on Quality Information Management Based on Quality BOM in Multi-Specification & Small-Batch Production
Authors: Zhou Dang , He Ming , Yang Zhi Bing
Published: October 2013

The characteristic of quality information management in multi-specification & small-batch was discussed, compared with mass production. Quality BOM was defined and its specific contents were described. On this basis, quality information modeling method based on quality BOM was introduced. The information model of quality structure tree was established and information structure of quality node was described in detail. Three different methods of quality defects relevance, including weak relevance method, strong relevance method and black box relevance method, were introduced, which satisfied different requirements of quality capacity evaluation. Functional models of Nimak Quality Information Management System were introduced as an application example. It was proved by this application example that the research provided a new solution to the problems of quality information management.
Effects of Dicyandiamide on the Accumulation and Leaching Risk of Soil NO3--N in Aquic Brown Soils
Authors: Qiao D.B. , Zhang Y.L. , Xiang L.L. , Lu C.Y. , Chen X.
Published: October 2013

A field experiment was conducted at the vegetable production base of Lixiang town in Shenyang city, Liaoning province to study the effects of dicyandiamide (DCD) application on the accumulation and leaching risk of soil nitrate. The results showed that applying DCD significantly decreased the amount of soil NO3--N in the 0-10cm and 10-20cm soil layers compared to without DCD addition (P < 0.01). However, the difference was not significant in the 20-40cm (P > 0.05). These results indicated that the application of DCD reduced the leaching risk of soil nitrate from topsoil to subsoil. At the 28d of fertilizer application, the amount of soil NO3--N was higher in the NP+M, NP+M+2%DCD and NP+M+5%DCD treatments than in the M, M+2%DCD and M+5%DCD treatments, suggesting that the combined application of chemical fertilizer and organic manure weakened inhibiting effect of DCD on the amount of soil NO3--N.
Gaussian Noised Single-Image Super Resolution Reconstruction
Authors: Qin Feng Qing , Zhu Li Hong , Cao Li Lan , Yang Wa Nan
Published: October 2013

A framework is proposed to reconstruct a super resolution image from a single low resolution image with Gaussian noise. The degrading processes of Gaussian blur, down-sampling, and Gaussian noise are all considered. For the low resolution image, the Gaussian noise is reduced through Wiener filtering algorithm. For the de-noised low resolution image, iterative back projection algorithm is used to reconstruct a super resolution image. Experiments show that de-noising plays an important part in single-image super resolution reconstruction. In the super reconstructed image, the Gaussian noise is reduced effectively and the peak signal to noise ratio (PSNR) is increased.
The Design of Speed Detector Based on Wireless Sensor Network
Authors: Kong Xiang Hong , Guo Yang Xue , Hu Zhi Fei , Qian Wei Guo , Lu Ke Xiang , Pan Xiang
Published: October 2013

An ultrasound velocimetry system based on single-chip CC2530 was designed, this combined the transit-time velocimetry and Doppler velocimetry, achieving the monitoring of wireless sensor network to the speed of the car. The Proteus software simulates the hardware circuits of the ultrasonic transmitter and receiver module. An ultrasound velocimetry system measures high-speed by the ultrasonic Doppler principle, it measures low-speed through the transit-time principle, the speedometer system was verified by the simulation technology. The design has a low complexity, low power, low cost, small error, application and so on.
Study on Aging of Zinc Oxide/Poly(butylene succinate) Composite
Authors: Cui Chun Na , Huang Ji Tao
Published: October 2013

Zinc oxide/poly (butylene succinate) composite (ZnO/PBS) were performed by aging test of 1008h. The chemical structure and crystallinity of the materials were characterized by fourier transform infrared spectroscopy and X-ray diffraction, and the aging properties of composite were studied by mechanical properties. The results showed that: the scale of characteristic functional groups had some change. And any of the reciprocal actions or effects, that can occur in composite molecule. The crystallinity of composite had reduced from 26.13% to 15.56% after aging. Mechanical properties of materials reduced gradually in aging, and reduced extent of ZnO/PBS composite was less than that of PBS.
Intraoral Dental Directly Study of the Three-Dimensional Measuring Method
Authors: Chen Can , Wang Deng Feng
Published: October 2013

a monocular structure optical grating projection measuring method using multi-frequency phase shifting codec, oral direct access to the tooth preparation method of the digital model, reveals direct access to oral tooth preparation morphology the law of the data.This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.Please make the page settings of your word processor to A4 format (21 x 29,7 cm or 8 x 11 inches); with the margins: bottom 1.5 cm (0.59 in) and top 2.5 cm (0.98 in), right/left margins must be 2 cm (0.78 in).
Temperature Data Gathering System Based on A-Wire Bus
Authors: Wu Tao
Published: October 2013

DS18B20 temperature sensor is a-wire bus sensor, which can directly output digital signal and is less influenced by external interference. Its measurement accuracy is high. Freescale microcontroller is used to develop this system, which has reliable performance. It could ensure that its regular use in the actual production and living. The program is compiled in Freescale CodeWarrior integrated development environment. Experiment result states clearly that this system can monitor and display environment temperature in real-time. It has practical value.