bluuebunny/crossref_metadata_2025 huggingface dataset:
Conductive Polypyrrole/Polyurethane Composite Fibers for Chloroform Gas Detection
Authors: Liu Xin , Qin Zong Yi , Zhang Xiao Lin , Chen Long , Zhu Mei Fang
Published: August 2013

Flexible conductive fibers were fabricated by in-situ chemical polymerization of pyrrole monomers on the surface of polyurethane (PU) fibers. Compact polypyrrole (PPy) surface layer were observed, and moreover, high structural stability of the composite fibers can be obtained due to interpenetrating interface formation and strong interaction between PPy layers and PU matrix. More importantly, the composite fibers exhibited high sensitivity with relative fast response and recovery time, and good reproducibility for chloroform vapor detection.
Research and Characterization of CaO-SiO2-B2O3-Al2O3-La2O3 Sealant with Different Alumina for ITSOFC
Authors: Qian Biao , Yang Jian Jun , Yu Jie , Ma Wen Hui , Yu Bo , Li Rui , Xing Jie , Zhang Na , Ning Ping
Published: August 2013

The CaO-SiO2-B2O3-Al2O3-La2O3 sealants with different alumina contents were fabricated by high-temperature melting method for intermediate temperature solid oxide fuel cell (ITSOFC). The glass transition temperature (Tg) and crystal temperature (Ts) of the sealant with different alumina content was characterized by TG-DSC. And the composition phase of the sealant was detected by XRD. The resistivity of sealant tested by electrochemical workstation was higher than 22 kΩ·cm2, which met the requirement for ITSOFC. Through the detecting of the wetting angle, the adhesion of sealant and anode materials was very good, and the single cell sealed with alumina tube successfully.
Preparation of CoCrFeNiCuMnSix High Entropy Alloys and their Microstructure and Properties
Authors: Zhang Li Sheng
Published: August 2013

According to the design concept of multi-element high-entropy alloys, seven kinds of elements (Cr, Mn, Fe, Co, Ni, Cu and Si) were selected in this work to design a series of CoCrFeNiCuMnSix high entropy alloys. Metal power was melted by vacuum arc furnace. Cast microstructure and phase structure of the high entropy alloy were Characterized by optical microscope (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD). And then, hardness, wear resistance and corrosion resistance were tested. Phase structure of cast microstructure, the morphology of the microstructure and mechanical properties of the CoCrFeNiCuMnSix high entropy alloys were researched systematic in the condition of different content Si. The results show that the crystal structure is simple BCC structure. With the increasing Si content, the alloy cast structure changes from dendrite morphology to cellular morphology. It was Si content that plays an important role in increasing significantly the hardness of the alloy. The hardness of the maximum value reaches to HV985.
Application Research of Al-Fe-P Master Alloy on Modifying ZL109 Alloys
Authors: Qi Guang Hui
Published: August 2013

In order to settle the environmental pollution and improve the excellent rate of products, ZL109 piston alloy modified by Al9Fe3P master alloy was prepared in factory. The microstructures and mechanical properties of ZL109 piston alloy were invested respectively. The technological parameters and modifying effect of using Al9Fe3P alloy were researched too. Experiments show that high quality of ZL109 pistons can be produced by adding 0.4~0. 5wt% Al9Fe3P master alloy at 760-770°C.The maxim and average grain size of primary Si decrease largely, less than 66μm and 40μm respectively, and the mechanical properties were improved accordingly. It was proved that Al-Fe-P master alloys have advantages such as no pollution, no reaction slag, shorter modifying time and saving energy, which would reduce the total cost of piston products. So Al-Fe-P master alloy is a promising modifier to refine ZL109 piston alloys.
Microstructure and Property Evolution of Cu90Zr10 Alloy in the Process of Mechanical Alloying
Authors: Li C.J. , Teng L. , Tan J. , Yuan Q. , Tang J.J. , Chen T.L. , Zhu Xin Kun
Published: August 2013

Cu90Zr10 alloy powder was prepared by high-energy ball milling. The microstructure and property evolution of this alloy powder during mechanical alloying (MA) were investigated by using X-ray diffraction and optical microscopy (OM). The alloy powder with an average grain size of 10 - 40 nm was obtained, and the grain size was found to decrease gradually with increasing milling time. The microhardness reached a maximum value (about 295 Hv) after 30 h milling. The internal microstrain and the microhardness of the samples increased due to the grain refinement and solid solution during milling, and 10at.% Zr could be brought into Cu lattice by solid solution during MA. At last, the mechanisms of strengthening were discussed.
Influence of Stirring Time and Holding Time on Microstructure and Properties of the A356 Alloy Modified by Sc
Authors: Zhang Su , Yang Gang , Yi Jian Hong , Yan Hong
Published: August 2013

Effects of the holding time and the stirring time on the microstructure and mechanical properties of A356 alloy modified by Sc are researched. According to the test results, most of the eutectic silicon phases have changed to the shape of creeping point, dispersed in the grain boundary of α (Al) phase while stirring 1 minute, in which case both the tensile strength and elongation reach the highest, resulting in the best modification effect. The results also indicate that microstructure and mechanical properties of the alloy reach are the best modification effect when the melt is held 15 minute. It can be known that the optimal stirring time is 1 minute and the optimal holding time is 15 minute in the experiment condition of the work.
Damage and Fracture Mechanism of As-Cast Ti40 Titanium Alloy during Hot Compression
Authors: Zhu Yan Chun , Zeng Wei Dong , Zhao Yong Qing , Peng Wen Wen
Published: August 2013

The damage and fracture behavior was researched in hot compression of as-cast Ti40 titanium alloy with single β phase. The main fracture modes consist of 45° shear fracture, inner cracking and longitudinal fracture on free-surface, which occur at 850°C/10s-1, 900~950°C/10s-1 and other deformation conditions respectively. Moreover, 45° transgranular cracking is the combination result of adiabatic shear bands due to local temperature rise and shear stress, the inner intergranular cracking is induced by the microvoids near the adiabatic shear bands propagted along grain boundry under shear stress, the surface longitudinal intergranular cracking is caused by the vaporization of oxide and function of hoop tensile stress. In addition, the material undergoes the complex fracture which has to be avoided or decreased in hot processing for obtaining satisfactory properties.
Nanocrystalline Cu90Nb10 Alloy Produced by Mechanical Alloying
Authors: Li C.J. , Zhang Q.X. , Yuan Q. , Tan J. , Teng L. , Chen G. , Chen T.L.
Published: August 2013

Nanocrystalline Cu90Nb10 alloy was produced by high energy ball milling mechanical alloying (MA). The effects of ball milling time on the microstructure and mechanical property of this alloy in the process of MA were investigated. The results show: up to 10 at.% Nb could be dissolved into Cu matrix by MA; the powder particles became compacted and homogeneous with increasing the ball milling time, and the deformation degree also increased synchronously; the grain size of this alloy was refined gradually, and it reached the minimum value of 11.5 nm after 30h milling; the microhardness of this alloy increased with increasing the milling time, and it obtained the maximum value of 328 Hv after 30h milling. The obvious reinforcement of this alloy may be due to the comprehensive effects of the fine grain strengthening, the solid solution strengthening and the strain strengthening.
Effect of Melt Intensive Homogenization on Solidification Microstructure of 7075 Aluminium Alloy by Twin-Screw Stirring
Authors: Gao Zhi Hua , Xu Jun , Liu Guo Jun , Zhang Zhi Feng , Tang Men Gou , Zhang Shao Ming , Fan Z.
Published: August 2013

Intensive melt shearing achieved using a twin-screw machine was applied to the 7075 aluminum alloy melt to investigate its effects on grain refinement. Alloy melt without and with melt shearing was cast in the standard test procedure mould, and the effects of casting temperature, shearing time and shearing intensity on microstructures were analyzed. The results show that the intensive melt shearing exhibits superior grain refinement and remarkable structure homogeneity. Without shearing, the grain size increases significantly with the increase in pouring temperature, while with intensive melt shearing the grain size is finer at all the pouring temperatures tested with a reduced grain size dependence on the pouring temperature. With the shearing time or shearing intensity increasing, the grain size of the equiaxed primary α (Al) phase decreases on the sample microstructures, and the grain distributions trend to become more fine and non-dendritical.
Toughening Modification of PA6 with Different Core-Shell Particles
Authors: Liu Zhen Yu , Xiong Yu Zhu , Mei Wen Jie , Wang Li
Published: August 2013

(POE-g-MAH/OMMT) and (POE-g-MAH/SiO2) toughening particles of core-shell structure were prepared by ball grinding method and were used to modify toughness of PA6.The morphology of PA6 modified by these core-shell particles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM),and were detected by mechanical performance test. The results show that both toughening particles could improved notch impact strength of PA6,and with toughening particle exceed 10%, composites notch impact strength is rapid increase.(POE-g-MAH/OMMT) particle of PA6 toughening effect is better than (POE-g-MAH/SiO2).When material under impact, OMMT produced slip effect in core-shell structure and SiO2 produced rolling effect.
Hydrothermal Preparation and Characterization of ZnO with Various Morphologies for Dye-Sensitized Solar Cells
Authors: Xiao Zonghu , Zhong Wei , Xu Shun Jian , Luo Yong Ping
Published: August 2013

Zinc oxide (ZnO) with various morphologies consisting of nanoparticles with a diameter of approximately 20 nm have been successfully prepared by hydrothermal method from zinc nitrate (Zn (NO3)2)/carbamide (CO(NH2)2) solution. The morphologies and phase structures of the as-prepared ZnO samples were characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD). Results show that the morphologies of the as-prepared ZnO are successively present in broom-like, cabbage-like, chinese cabbage-like, honeycomb-like with the increase of the CO(NH2)2 concentration from 0.1 M to 1 M. The photovoltaic performances of dye-sensitized solar cells, based on ZnO with various morphologies as the photoelectrodes, are unobvious. With the morphologies of ZnO evolving, the short circuit photocurrent density (Jsc) increases from 2.35 to 3.72 mA/cm2, the fill factor (FF) increases from 0.400 to 0.570, and the corresponding conversion efficiency (η) varies from 0.520 % to 1.200 %. The low η may be due to the formation of the Zn2+/dye polymers.
Temperature and Time-Resolved Dependence of Photoluminescence in InGaN Quantum Dots
Authors: Chen Cheng , Qiu Zhi Ren , Shu Xiang Ping , Li Zeng Cheng , Liu Jian Ping , Feng Zhe Chuan
Published: August 2013

Temperature dependence of photoluminescence (PL) and time resolved photoluminescence (TRPL) were obtained by two experimental systems. The relative intensity and peak position of PL show S-shift variation with increasing temperature, which may result from temperature induce carriers redistribution. Fast decay time and slow decay time were fitted by double exponential function from decay curves of TRPL at different emission energy, and the decreasing trend of both fast decay and slow decay time with increasing photon energy is attributed to various channels of recombination in shallow and deep localized states.
Design for Amorphous Silicon Solar Cells
Authors: Xue Chun Rong , Sun Xia Yun
Published: August 2013

This document explains and demonstrates how to design efficient amorphous silicon solar cells. Some of the fundamental physical concepts required to interpret the scientific literature about amorphous silicon are introduced. The principal methods such as plasma deposition that are used to make amorphous siliconbased solar cells are investigated. On the basis, high-efficiency solar cells based on amorphous silicon technology are designed. Multi-junction amorphous silicon solar cells are discussed, how these are made and how their performance can be understood and optimized. To conclude this document, some of the directions that are important for future progress in the field are presented.
The Effect of the Horizontal Distance between the Permanent Magnets on the Levitation Force in Hybrid Magnetic Levitation System
Authors: Ma Jun
Published: August 2013

It has been investigated that the interaction force in hybrid magnetic levitation systems with a GdBCO bulk superconductor and a permanent magnet system and two permanent magnets (PM2) and two cubic permanent magnets (PM3) system in their coaxial configuration at liquid nitrogen temperature. A single-domain GdBCO sample is of 20mm and 10mm in thickness, the permanent magnet PM1 is of rectangular parallelepiped shape, the permanent magnets PM2 and PM3 are of cubic shape; the system placed on the middle of system and their coaxial configuration; It is found that the maximum levitation force decreases from 46.3N to 16.3N while the horizontal distance (Dpp) between the rectangle permanent magnet and two cubic permanent magnets (PM2) is increased from 0mm to 24mm and the horizontal distance (Dsp) between a GdBCO bulk superconductor and two cubic permanent magnets (PM3) is 0mm, The results indicate that the higher levitation force can be obtained by introducing PM-PM levitation system based on scientific and reasonable design of the hybrid magnetic levitation system, which is helpful for designing and constructing superconducting magnetic levitation systems.
Based on the Technology of Shaped Charge Numerical Simulation Research of the Ice Model's Combination Blasting
Authors: Meng Wen Yuan , Hu Jun Qiang , Liu Xin
Published: August 2013

Combination of ice blasting model is set up with the program of blasting with technology of shaped charge, numerical calculation is carried out, and the shockwave peak pressure in ice medium is obtained based on the large-scale finite element software ANSYS/LS-DYNA . This paper analyzes the stress distribution of ice in the combination of underwater explosion loads, and studies the process of the underwater explosion. The article aims to promote the application and research of underwater explosion in Yellow River and Hei Long Jiang River ice blasting, etc.
SolidWorks Secondary Development System of DTH Bits
Authors: Li Chang Ping , Rao Jian Hua , Hu Jun Lin
Published: August 2013

DTH (Down-the-hole) Bits are widely used in engineering construction and mining but the design level of DTH Bits needs improving. The kinds of DTH Bits are various in the practical application. Meanwhile, design efficiency is low and management in design information of historical product is insufficient. To solve the problems, key features of the DTH Bits used in different strata are analyzed and SolidWorks secondary development system of DTH Bits is developed with VB.NET. The secondary development system runs in the same process with SolidWorks in the form of a plug-in. ADO technique is used to connect the system and database which stores design information of historical product. It proves that the secondary development system can improve design and management efficiency of DTH Bits.
Effects of Potassium-Dissolution Microorganisms on Surface Properties of Orthoclase and Bioleaching
Authors: Zhan Shou Fa , Chen Ye , Sun De Si
Published: August 2013

The alternation of surface properties of orthoclase after biological conditioning with Bacillus mucilaginosus and Aspergillus niger was investigated by zeta potential and adsorption studies. Bioleaching potassium from orthoclase by the two strains were also studied. Results show that IEPs of the two strain continuously decrease in their each logarithmic phase and stable phase. the IEP of orthoclase, after which interaction with cells, moves towords the IEP of cells. The adsorption of B·mucilaginosus is faster and higher than Aspergillus niger onto orthoclase. The potassium extractions by adapted B·mucilaginosus and unadapted B·mucilaginosus reach 24.0% and 18.5% respectively, 23.0% and 20.0% respectively by adapted Aspergillus niger and unadapted Aspergillus niger after bioleaching 9 d.
Analysis of Mechanism Reliability in Anti-Dislocation Locking of Space Cable-Strut Deployable Articulated Mast
Authors: Tan Zhong Qiang , Zhao Ming Yan , Wang Shi Jiao
Published: August 2013

The study is limit-locking mechanism of space cable-strut deployable articulated mast. On the base of structure and working principle, the mechanism’s failure in ant-dislocation locking is analyzed and a new analytical model of reliability has been constructed. In the process of calculating reliability index, the factors such as size, assembly error, and space environment influence have been taken into consideration, and the method of MFOSM (Mean First Order Second Moment) has been applied. Based on the actual size of the mechanism, reliabilities of mechanism ant-dislocation locking have been calculated at both room temperature and space limit temperature. The main influencing factors have been analyzed and the improvement has been put forward. Calculations show that the new model has a high reliability in ant-dislocation locking.
The Stiffness Analysis of a Mechanical Gantry under Torsion
Authors: Wang Yong Quan
Published: August 2013

When a heavy torque load acts on a kind of mechanical gantry, its largest deformation displacement must not be larger than the given upper limit value. So we must make an accurate deformation analysis of the whole structure of the gantry. This paper introduces the analyzing process of the main structure stiffness of the gantry. According to the calculating results , the weak part of structure is found. This part arouses the main deformation of the gantry when loaded. Then a solution is made for it. The stiffness analysis of the gantry is also performed using a FEA software. By comparing the computing results of the two methods, an analysis of the respective computing characteristics and limits of them is given, and a reference for the stiffness analysis of the similar equipments is provided.
The NC Machining Post-Processing Technology Based on UG
Authors: Liu Ying , Xie Fan , Liu Jie , Wang Jin Cheng
Published: August 2013

Post-processing technology is the key to CNC automatic programming technology and an important module of the CAD / CAM system. Post-processing technology converts the NC program that is produced by the CNC automatic programming tool into the file that can be identified by CNC system. Moreover, the generated tool path files must match with the CNC system. Post-processing techniques and UG software are briefly introduced. Using them, a post-processor for FANUC CNC systems is created. The program that generated by the special processor is contrasted with the general processor. The results illustrat that using the dedicated post-processor in engineering applications can improve programming efficiency and processing reliability.
Design of Stress Relief Groove on a Press-Fitted Assembly
Authors: Lee Dong Hyong , Choi Ha Young , Song Chang Yong , Lee Bong Gu
Published: August 2013

The objective of this study is to propose the effective method of reducing the maximum contact pressure at the contact edge of press-fitted shaft by optimizing the location and the size of stress relief groove in hub face. Finite element analysis was performed in order to determine the contact pressure and stress state on a press-fitted assembly and optimization were applied to select optimal size and location of stress relief groove. In order to reduce the cost of optimization design, approximation optimization method is used and the optimum results obtained by Sequential Quadratic Programming and genetic algorithm are compared. Optimized results show that the maximum contact pressure at the contact edge of press-fitted shaft with optimal stress relief groove decreased about 30%. And the both optimization algorithms can effectively reduced the maximum contact pressure at the contact edge of press-fitted shaft.
Impact of Temperature Control on the Dynamic Clearance of the Injection System of Squeeze Casting Machine
Authors: Bai Shang Ping , You Dong Dong , Zhao Jia Huan , Li Yuan Yuan
Published: August 2013

Changes of the clearance between punch and chamber resulting from thermal-mechanical loading effects affect the injection process of squeeze casting greatly. This paper aims to control the changes of the dynamic clearance in order to ensure the smooth operation of the injection system. A temperature control method by cooling punch was proposed, and two cases of vertical injection processes, which were cooling and non-cooling, were simulated during the ten squeeze casting cycles. The clearance changed from the initial 0.15mm to the stable 0.099mm in the case of cooling, while from the initial 0.15mm to the stable 0.071mm in the case of non-cooling, which demonstrated the temperature control method was effective and feasible.
Materials Used in Sustainable Design
Authors: Mo Xian Tao , Wang Peng Cheng
Published: August 2013

With the strategy thought of sustainable development, proceeding from materials used in sustainable design, to analysis the relationship between the selection of materials and the environment resources. To realize the purpose of making a harmony development of human and environment, using the source from design, we think about how to reduce the destruction to nature, to maintain a sustainable development in economic society.
The Effect of Non-Return Nalve on Micro Injection Molding Machine
Authors: Huang Rui Huan , Zhou Gang , Dong Li Qun , Zhang Ya Jun
Published: August 2013

The micro injection molding machine (MIMM) is used to produce precision plastic products. The non-return valve (NRV) on the screw head of injection machine plays the role of preventing the melt back discharge during injection process. The sensitivity of non-return valves opening and closing affects the quality of the product. In this paper, numerical simulation of three-dimensional flow field is generalized by the Newtonian isothermal fluid method. Then, five kinds of different structural parameters of NRV are designed, and the pressure field, the pressure difference is simulated by the Polyflow software. At last, the pressure field, and the pressure difference on both side of NRV are analyzed and compared. The best structure parameter of NRV is decided. The simulation results are useful for the NRV design.
Multi-Objective Fuzzy Optimization Design of Worm Drive
Authors: Liu Xiao Xing , Pan Qi Ying
Published: August 2013

Fuzzy factors in the worm reducer design are analyzed, and a multi-objective optimization model with minimum volume and maximum bearing capacity is established in this paper. Optimal level cut-set method is introduced to conduct comprehensive evaluation on constraining fuzziness and convert the fuzzy constraint into general constraint according to the actual conditions and requirements; for multi-objectives, single-objective optimal solutions are fuzzified to form fuzzy sets to establish the membership functions of the fuzzy sets by taking the fuzziness between the single objectives and between the single objectives and multiple objectives into consideration, and multi-objective optimal solutions are obtained by maximizing the membership functions of the fuzzy set intersection. For an actual worm reducer, the fuzzy theory and method are applied to obtain results, and the validness of the method is demonstrated by comparing such results with the conventional design data.
The Status Quo and Development Tendency of Domestic Synchronous Chip Seal Truck
Authors: Liu Chen Min , Du Mu Wei
Published: August 2013

As road construction machinery, Synchronous chip seal truck achieves the synchronization of asphalt and aggregate spilling to improve and enhance the quality of the road surface sealing layer, and wide application in road construction and maintenance. Synchronous chip seal technology, construction technology and synchronous chip seal truck were discussion introduced. Technology status quo of domestic synchronous chip seal truck was analyzed and the development tendency was discussed.
Research on Construction of Working Platform of R&D Dynamic Alliance Featured by Networking Synergy for Complex Products
Authors: Yang Chun Li , Zhao Ying
Published: August 2013

The R&D of complex product has characteristics like complex structure, high reliability requirements, long cycle, big investments, and high degree of coordination among subjects. Base on this and from hierarchical model and function model, the paper put forward a networking synergy collaborative work platform oriented to different stages, different goals and different users and integrated with individuation and diversification. From the Angle of hierarchical model, the platform is divided into base layer, service layer, application layer, presentation layer,user layer and extension layer six layers. From the Angle of function model, the platform includes the product data management system, product technology aided design system, intellectual equity management system, project management system and aided analysis software five systems. This platform can be applied to complex product dynamic alliance networked R&D, shorten the product development cycle, and improve the work efficiency.
Study on Slot Bottom Size of Stringing Pulley Based on Reducing Conductor Abrasion
Authors: Zhou Hai Ying , Jiang Ming , Bu Chun Lei
Published: August 2013

Slot bottom size has directly effect on conductor abrasion,Chinese Technical Regulation of design for Stringing blocks of overhead transmission lines (DL/T371-2010) clearly states that slot bottom size should be no less than 20 times of the size of conductor to be extended. In this paper, based on effect of slot bottom size on conductor abrasion,the size of slot bottom of stringing pulley is analyzed. Some useful suggestions are given.
Research on Mixed-Model Assembly Line Balancing Problem of Type II with Uncertainty
Authors: Liao Wei Zhen , Hou Kai Hu , Zhong Jing Yuan , Zheng Yu Jie
Published: August 2013

Uncertainty has negative effects on mixed-model assembly line balancing. With this uncertainty, the paper built a mathematical model on MMALBP of type II , and designed a solving method which is based on GA. It contributes to the management of the assembly line and production arrangements, and increases production efficiency.
The Target Tracking Algorithm Research of Independent Vision Robot Fish
Authors: Zhang Ming , Wang Li , Shi Hai Hua , Xiang Wei
Published: August 2013

In the independent vision robot fish games, the interference of water wave often causes tracking inaccuracy and target tracking failure. In order to solve these problems, the Meanshift algorithm and the combination of Meanshift algorithm and Kalman filter respectively are studied to realize target tracking of independent vision robot fish in this paper. By comparing the two algorithms, the results show that: the former tracking algorithm is not ideal and easy to lose the target. The combined algorithm of Meanshift and Kalman filter can effectively improve the performance of single-target tracking in a complex environment to achieve the goal of continuous accurate tracking.
Dynamic Simulation of a Woodpecker Robot Based on Self-Excited Vibration
Authors: Xu Yong , Hu Wei , Zhang Shan Ping
Published: August 2013

This paper studies complex nonlinear dynamic behaviors of a woodpecker robot system which can only operate in the presence of friction as it relies on combined impacts and jamming. The woodpecker robot can periodically move without any drives and controls based on self-excited vibration phenomena. The whole time histories of the dynamic simulations in successive periods indicate its cyclical, stable passive movement. Keywords: Passive movement; Self-excited vibration; Dynamic simulation; impact and friction
Process Optimization of 3D Optical Fiber Laser Cutting Robot for Press Hardening of UHSS
Authors: Liu Hui Qiang , Zhang Yi Sheng , Liu Pei Xing
Published: August 2013

The hot forming parts of high strength steel are difficult to cut with the presses and the traditional high-energy beam due to its high tensile strength which can be up to 1500Mpa and its complex structure. And the 3D laser cutting is an effective way to solve the problem. However some problems in the laser process affect the efficiency and quality seriously, including interference between the robot arms and the cutting head with the untrimmed parts, difficulty in determining the entry point and over burning etc. In this research three measures are taken to cut the anti-collision beam, including using photogrammetric technology to get its uncutted 3D model for offline programming to avoid interference, selecting appropriate entry point to trim without interrupt, amending normals and adjusting the process parameters at corners to prevent over burning. The results show that the efficiency and quality are improved and a creative new offline programming method is put forward.
Micro Rescue Robot Locomotion Trajectory Plan
Authors: Liu Tie Jun , Xing Tian Yi , Zhang Zhong Jun , Pan Chun Xiang
Published: August 2013

Aiming the case that vibrations and shocks of micro rescue robot parts caused by the unsmooth locomotion of micro rescue robot, in order to ensure the smoothness of the micro rescue robot trajectory and no collision, eventually to arrive the desired position and orientation, based on the basis of the kinematics and dynamics, according to the micro rescue robot joint movement characteristics, trajectory planning use the D-H method and the track is divided into acceleration, constant speed, and the deceleration three motion segments to discuss, this is of great significance to solve the smooth of micro rescue robot to work in different environments and real-time control and accuracy problems.
Autonomous Decision-Making for Human-Robot Hybrid System Based on FRF
Authors: Chen Feng , Tang Min , Ma Cong
Published: August 2013

This paper demonstrates a concept of walking power assist leg (WPAL), which is designed for enhancing strength and endurance during walking. Using D-H method, the kinematics of WPAL is investigated theoretically. The reasonability of fundamental design is verified by the simulation results. To make the system work smoothly and provide power assist for operator, the robot must understand the operators intention. In this paper, the floor reaction force (FRF) information has been used to complete the intention prejudgment of its operators leg movement. The method of prejudgment and FRF information acquisition system are designed. The experimental results also indicate the feasibility of FRF system.
A New Electrochemical Aptasensor for Protein Detection Based on Target Protein-Induced Strand Displacement
Authors: Cui Han Feng , Fan Hao , Lin Yan
Published: August 2013

A sensitive electrochemical aptasensor for detection of thrombin based on target protein-induced strand displacement is presented. For this proposed aptasensor, dsDNA which is from immobilized probe DNA (IP) which has a hybridized with aptamer(Apt) initially was immobilized on the Au electrode through thiol group of IP，while a DNA labeled with PdS nanoparticles was used as a detection probe (DP-PdS). When Au electrode immersed into solution which contain target protein and DP-PdS, the aptamer preferred to form G-quarter structure with the present target protein and dsDNA was released into immobilized probe DNA (IP) which could be hybridized with DP-PdS. After dissolving PdS from electrode, a mercury-film electrode was used for electrochemical detection of these Pd2+ ions which offered excellent electrochemical signal transduction. Detection of thrombin was specific without being affected by the coexistence of other proteins such as BSA and lysozyme, and as low as 2.3×10-11 mol/L of thrombin was detected.
Improvement of DOAS Technology in the Application of Mixed Gas Quantitative Analysis
Authors: Li Xue Gang , Lv Xiu Ling , Zhang Yi
Published: August 2013

According to difference absorption spectrum mixed gas absorption spectrum in technology overlapping problem, a DOAS technology based on the PSO and LS-SVM fusion method was proposed. First, SO2, NO respectively to construct a quantitative analysis model by LS-SVM, And then, using PSO is strong optimization ability of least square support vector machine (SVM) the optimization of the parameters of the algorithm, and then, LS-SVMs parameter are optimized with PSO of the powerful searching ability, Finally, rebuilt the quantitative analysis model. Experiments show that using the improved DOAS method is feasible in solving the mixed gas spectrum overlap problem which has certain practical significance.
Research on Control System for Multi-Wheel Independent Electric Drive
Authors: Yan Nan Ming , Zhang Yu Nan , Li Nian Yu
Published: August 2013

To meet the special requirements of battlefield, a 4×4 hybrid electric drive scheme based on 1-ton military wheel vehicle is proposed, it consists of engine-generator sets, electric power converter, battery and AC (alternate current) motors, and the corresponding matching calculation of its main components is implemented in this paper. On this basis, a distributed electric drive control system based on CAN bus network is also developed. The control system not only realizes electric differential function when vehicle is steering, but also provides with three different kinds of driving modes. Experiment results of prototype vehicle prove that what studied in this paper not only satisfy requirement such as strong mobility and multi-function, but also be reliable.
PID Control of Hybrid Injection Molding Machine Temperature
Authors: Ling Wei
Published: August 2013

This article analyzing the importance of PID in the design of the temperature process controller for hybrid injection mould machine. The injection mould machine is a basic requirement of plastic. Its process to mould the items through adjustment of proper temperatures realized desired shapes. And it is very indispensable to maintain these desired temperatures. PID controller is used as an industrial process controller. It may not get satisfying results when used as a temperature process controller. The temperature process has the characteristics of non-linearity, large inertia and time variations. To solve these problems, this article put forward an effective controller design by introducing PID in the designing of temperature process controller. The paper drafted the performance analysis of PID controller versus based controller designs.
Design of RTP Temperature Controller Based on Fuzzy-PID
Authors: Jiang Yu Lei , Yuan Jun Jie
Published: August 2013

During RTP(Rapid Thermal Processing),temperature control precision and uniformity of wafers are the two key factors that impact the performance of wafers significantly. Based on the model obtained through the heating characteristic analysis of RTP device designed by Robot Lab of NCUT, a combined Fuzzy-PID controller is proposed. It was designed and optimized by using MATLAB Fuzzy toolbox and prepared with conventional PID strategy. The results of simulations show that the Fuzzy-PID controller solves the overshoot of temperature and has better abilities than conventional PID. In consideration of the parallel structure of Fuzzy-PID and the control of auxiliary equipments, FPGA was selected as the core processing chip to realize the design of temperature control card. Finally, based on Verilog HDL, the Fuzzy-PID controller was realized on FPGA, ensuring the precision of temperature and controlling the auxiliary equipments stably.
CFD Simulation of the Fluidized Bed Applied in the Synthesis of Benzene Series Organosilicon
Authors: Han Xin Feng , Li Jian Long , Xu Ning
Published: August 2013

The mathematical model of gas-solid flow 2D fluidized bed was established. The CFD simulation was carried out with commercial software FLUENT6.3 by using Eulerian-Eulerian multiphase models, based on the kinetic theory of granular flow and PC-SIMPLE algorithm. In order to provide a basis on optimizing the operating conditions of the fluidized bed applied in benzene series organosilicon reactor, the processes of bubble formation, growth and disappearance under different cases were analyzed.
Simulation on Flow Field and Temperature Field in Water Cooling Tuyere of Blast Furnace
Authors: Qie Ya Na , Zhang Shu Hui , Lv Qing , Zhang Li Hong
Published: August 2013

Life span of water cooling tuyere is one of important factors of blast furnace’s direct motion and high yield. In order to improve the life of tuyere, the flow fleld and temperature field of tuyere were simulated by using computational fluid dynamics (CFD). Simulation results show that the maximum temperature appears at the front margin of tuyere outlet side. The highest temperature of tuyere reduces significantly with the increase of water pressure below 0.4MPa. When the water pressure exceeds 0.4Pa, the highest temperature reduces slowly. In consideration of economic benefit and cooling effect, the best point of inlet pressure is 0.4MPa or so.
The Simulation of the Un-Saturated Flow in the Dual-Scale Porous Media under Constant Flow Rate
Authors: Ye Xin , Yan Shi Lin
Published: August 2013

Considering the un-saturated in the experiment, the purpose of this paper is achieving a simple 1d molds unsaturated simulation of the filling process through the compiled software pore-flow and compare the single-scale result with the dual-scale result.
The Properties of Solutions on a Class of Parabolic System
Authors: Xiu Zong Hu
Published: August 2013

By the method of up-sub solutions, we consider a class of parabolic equations with nonlocal source. In the paper, we discuss the relation of the coefficients and the importance of the initial value. We get the sufficient conditions for the global existence and finite blow-up of the solutions.
Intelligent Alarm Function Based on RIA Technology of Equipment Network Management Design and Implement
Authors: Wang Gang , Bao Xing Chuan , Ding Jie
Published: August 2013

Most of the traditional network management system used c/s mode, and deployment is not convenient. When device warns, operators will face a lot of alarms, and unable to determine the cause of the accident quickly. In this paper, intelligent alarm function design based on RIA / Flex for the power communication network has visual user level and deployment convenience. The alarm of network management is classed based on the business features. Mechanisms are presented in the paper for the filtering, detection and display of alarm information and monitoring of the electric power communication devices. We establish intelligent alarm system for power communication network based on RIA technology.
Research on Relationship of Residual Stress, Grinding Conditions and Workpiece Property in Engineering Ceramic Grinding Surface
Authors: Liu Wei Xiang
Published: August 2013

Engineering ceramic are special hard and brittle materials, their surface properties are very sensitive to the state of the surface stress, the compressive residual stress can be improved part strength and surface properties in a certain extent, especially can increase breaking strength, tensile residual stress in the opposite role. The choice of grinding parameters and grinding temperature have great influence on the residual stress. improving grinding conditions can improve the surface properties, within a certain range, increasing grinding depth and reducing grinding temperature are advantageous to produce the beneficial compressive residual stresses on the surface properties.
DCS Simulation Training System Design and Implementation
Authors: Yan Chao Yong , Yu Yao Jun
Published: August 2013

With the development of domestic petrochemical enterprises, the need of the import equipment is increasing, so the training for the worker is extremely urgent. This paper designs a set of simulation training hardware system, using the current material resources, according to the configuration file free configuration, so as to reduce the development cost, to speed up the development speed and efficiency. At present the simulation system has been used in domestic petrochemical enterprises, and achieved good economic and social benefits.
A High Speed and Compact Data Acquisition and Storage System
Authors: Bu Kai , Xu Hui , Sun Zhao Lin , Liu Jian Bin
Published: August 2013

Data acquisition and record system plays an important role in signal processing. For the wideband signal acquisition and processing application, such as 3G/4G Base Stations, Wideband Microwave Backhaul, Military Communications, and RADAR, the need for high speed and smart software-defined radio (SDR) test platform is growing. In this paper, we implement a high compact form factor data acquisition and storage system used for the wideband signal application development. In order to implement high compact, low power and high speed real-time data storage, we use a PCIe-based switch architecture and leverage the Flash array as the storage part. The system supports RF sampling directly and offers a 16TB solid state storage module which could be read and write at the sustained speed of 12.8GB/s.
Progress of Traditional Ultra-Precision Machining Processes
Authors: Han Zi Xu , An Li Bao , Zhao Hai Dong
Published: August 2013

Ultra-precision machining is in the forefront of advanced manufacturing technology and also will become the basis of future manufacturing technology. Ultra-precision machining already has turned into the enabling technology to success in the international competition. Some new progresses in traditional ultra-precision machining processes including processing and measuring techniques, machining equipment, and analysis methods are introduced in this paper. Components with high form accuracy and good surface roughness are widely applied to precision apparatuses. Structured surfaces can be acquired by selecting reasonable machining parameters before mechanical process. The continuous growing markets will fuel many industrial sectors by ultra precision machining. We should pay great attention to the further developments of this technology.
Design and Application of Students’ Learning Mode in Science and Engineering Universities under ESP Environment
Authors: Chen Ke , Li Fang Lei
Published: August 2013

With the development of world economy and trade,as well as the reform of college English teaching and learning in China, the teaching and study of English for Specific Purposes (ESP) has also been developing rapidly. However, according to the functional theory of Halliday and the meaningful learning theory of Ausubel, ESP education and teaching in universities at different levels should suit students various professional needs and bear their own traits, therefore ESP teaching and learning mode should be designed with the intent to bring the improvement to students competitive ability. This paper attempts to discuss the design and application ESP teaching and learning mode in science and engineering universities so as to provide some reference to the reform of Xi 'an education and teaching.
Research of Remote Monitor System for Agriculture Equipment Based on Embedded System and Wireless Network
Authors: Yin Yan Xin , Tan Yu , Wang Shu Mao
Published: August 2013

A remote monitor system was came up with in this paper aiming at dynamically monitor agriculture equipment working status. The system used Zigbee based portable data terminal as data collector, ARM11 based embedded system as wireless gateway, and laptop as remote monitor device. An embedded software based on WinCE6.0 was developed for data processing and transmitting, and a VC++ based software was developed for remote monitor, data store and alarm. In order to verify the performance of the system, a working subsoiler stress measurement test was made in soil-bin, the result indicated the system showed a high performance in data collection, transmission, processing and remote monitor, and could provide a support in agriculture equipment working status monitor.
The Study on the Impact of Environmental Regulation on the Performance of High-Tech Industry
Authors: Wu Chang Hai , Song Yu Liang , Pan Yan Ming
Published: August 2013

In the era of knowledge and low-carbon economy, how environmental regulation can affect the performance of high-tech industry has become a hot topic in many academic studies. Basing on the study sample of the high-tech industry, this paper develops the scales of environmental regulation and the performance of high-tech industry, and then tests the impact of environmental regulation on the performance of high-tech industry through SEM. The results show that command-control environmental regulation has insignificant affect on high-tech industry economic performance, ecological performance and technological performance, but incentive environmental regulation and voluntary environmental regulation have significant positive effect on high-tech industry economic performance, ecological performance and technological performance.
Research on Welding Deformation of Thick Plate Duralumin Alloy under A-TIG
Authors: Wang Yan
Published: August 2013

Using A-TIG to welding thick plate duralumin alloy and designing rationally welding processing for Y groove butt plates welding of duralumin alloy. Using repeated measurements of dot to get transverse and vertical welding deformation under different current of A-TIG after welding. This paper analyzed the influence of different current on welding deformation and the features of A-TIG welding deformation. The result showed that transverse deformation was the uniformity along weld direction but was not uniform along weld vertical direction. Transverse deformation was larger when it was nearer to weld. Vertical deformation of middle position of weld was smaller than the part of arc starting and arc suppression. The result also showed that the deformation increased as the current increased.
A Study on Movement Characteristics and the Destruction Regularities of the Overlying Strata from Deep Mining
Authors: Tang Jian Quan , Zhang Xiu Li , Li Shen Hui
Published: August 2013

On the basis of the important role of the overlying strata movement in safety prediction and control of coal mining, indoor similar material model test was conducted to study on the movement characteristics and the destruction regularities of the overlying strata from the deeply buried sublevel caving coal mining. The generation position and its extension regularities of overburden bed separation after the mining were analyzed. In addition, the impact of abutment pressure on movement conditions and structure damage of strata combination was explored. Lastly, characteristics of the rock beam subsidence and surface subsidence were discussed with the intention of providing basis for the design of pressure control of stratum movement and mines.
Study on Asphalt Absorption of Steel Slag
Authors: Chen Ju Yong , Wu Shao Peng , Xie Jun , Wang Teng , Chen Zong Wu , Jenkins Kim
Published: August 2013

Steel slag has been using as a substitution of natural aggregate, such as basalt and limestone, in road construction. But the huge asphalt absorption of slag has been a main obstacle to hinder the utilization of slag. But the detailed study in this area is still less. This paper investigated the asphalt absorption characteristic of steel slag. The results suggest that: the value of asphalt absorption of steel slag (AAOS, the weight of asphalt absorbed by per 100g steel slag) is much higher than the ones of limestone or basalt; AAOS increase slowly with the prolongation of storage time or the increase of storage temperature; the increase of viscosity causes a drastic reduction of asphalt absorption. The results also reveal that with the increase of asphalt content the AAOS value firstly increases and then decreases.