bluuebunny/crossref_metadata_2025 huggingface dataset:
Equipment Selection Optimization System of Draglines and it’s Applications in Opencast Coalmine in China
Authors: Mei Xiao Ren
Published: February 2011

Draglines equipment selection optimization involves many factors. Manual simulation has many shortcomings,such as lower calculation accuracy, less programs, long design cycle, so it is hard to make a optimization program. Equipment Selection Optimization System of Draglines (ESOSD) is designed and developed according to the deposit occurrence of opencast coalmines in China. Visual Basic 6.0 is used as programming language, Access 2003 as Background database and the software such as Microsoft Excel 2003 and Autodesk AutoCAD 2004 are integrated in the ESOSD. Three mining schemes of SL opencast coalmine that put forward by SY Design and Research Institute were optimized by using ESOSD. The results show that scheme Ⅱ is better than the other two schemes, which is recommended as the draglines stripping scheme. The main parameters of scheme Ⅱ are as follows: stripping bench height is 45 meters; stripping bench width is 60 meters; throwing blast is adopted; stripping bench is 16 meters lowered by two D10R580HP dozers; dragline model is 1570WS, which boom length is 91.7 meters and bucket capacity is 72.7 cubic meters, and annual overburden amount is 17.2 Million cubic meters. By comprehensive comparison the optimization results with that of SY Design and Research Institute, The total cost reduces 7.512 Million Yuan (RMB) than that of the institute, bucket capacity of dragline reduces 10.7 cubic meters, and boom length reduces 14.3 meters. The optimization results show that ESOSD is reliable and practical, and it can be used as a decision support system for draglines equipment selection optimization.
Multi-Objective Optimization Method Based on WSLS Evolutionary Game Model and its Application in Mechanism Design
Authors: Li Rui , Xie Neng Gang , Meng Rui
Published: February 2011

This paper first proposes new multi-objective optimization method based on WSLS (Win-Stay-Lose-Shift) evolutionary game model and all game players automatically adjust behavior mode according to evolution rules of WSLS game model, which improves the game method for solving multi-objective optimization problems. Besides, this paper presents solution of WSLS evolutionary game model including evolution rules, behavior mode of game players and solution steps. Finally, the effectiveness of this method is verified by solving three goals optimization problems in mechanism design.
Finite Element Analysis of Blanking Process by Superimposing Ultrasonic Vibrations
Authors: Yeh Wei Ching , Chu Tsuh Siao , Wang Shiuan Sheng , Fuh Kuang Hua , Chen Kuan Hun
Published: February 2011

The application of ultrasonic vibrations superimposed on wire drawing, deep drawing, upsetting and rolling has been developed in the literature. No attempts have ever been made to develop the application of the ultrasonic vibration to blanking process. This paper reports an investigation into the effects of the superimposed ultrasonic vibrations of the die during the blanking process by finite element software DEFORM-2D. The results are compared with the conventional blanking experiment by Hatanaka and Yamaguchi [7] and the simulations are analyzed with various vibration directions, amplitudes and frequencies. The effects of the ultrasonic vibration on the punch load, flow stress and edge profile are systematically studied. The results show ultrasonic vibration can decrease the punch load and improve the quality of edge profile by increasing the vibration amplitudes and frequencies.
The Coal Plough Equipment Gray Connection Decision Model Base on Entropy Value Law
Authors: Zhang Qiang , Song Qiu Shuang
Published: February 2011

The coal plough equipment of traditional choice method has subjective capriciousness question, This paper discuss and analyze the assessment of mining method by entropy value law and gray connection theory, carries on the quantification recursive operation according to the normalizing formula, calculates all levels of membership function separately, it has established the coal plough way gray connection decision-making model. we research and analyze Yangquan coal mining to prove the model, it provide Selection of coal plough decision-making method.
On Optimal Inventory Model for Obsolescence Perishable Products under Unpermitted-Stockout
Authors: Xie Xiao Liang
Published: February 2011

With the advancement of science and technology and the fast change of buyer requirements, the short-life products have been shortened at large, some formerly long-life products gradually turn to value deterioration products. The ratio of value deterioration products to modern products is getting higher and higher. This paper develops a deterministic economic order quantity EOQ inventory model, where the demand rate depends on the on-hand inventory when inventory level exceeds certain quantity , otherwise the demand rate is constant. The effects of obsolescence are taken into account, for it is related to the demand rate. The results are discussed through two numerical examples. A sensitivity analysis of the optimal solution with respect to parameters of the system is carried out.
The Research on the Cutting Property and Structural Optimization on Tooth of Oil and Gas Pipeline Tapping Cutter
Authors: Ding Qing Xin , Liu Xiao Meng , Lou Xiao Zhong , Han Zai Ming , Zhang Shi Min , Tian Ying Cheng , Hui Kun Liang
Published: February 2011

The tap cutter is one of the key equipment for the pipeline maintenance and rush repair, which in intended to solve broken tooth due to continuous cutting and impact during tapping. Three kinds of tap cutter optimization schemes are put forward and the finite element design and cutting experiment are applied to study its cutting property. The results show that, the optimized tooth can improve the tapping effect, largely enhance the cutting property, which has reached the level of the most advanced TDW tap cutter; thus, it is of great importance on the efficiency improvement and cost saving of the domestic pipeline maintenance and rush repair.
Development of Micro-Cutting Force Sensor Based on Principle of Resistance Strain
Authors: Yang Yan Fang , Kou Bao Song , Ma Hong Wei , Chen Hao
Published: February 2011

In order to test the micro-cutting force during the process of micro-fabrication, a precise sensor needs to be designed. This study, micro-cutting force sensor based on principle of precise resistance strain is designed, which is made of octagonal ring elastic element, makes it possible to measure the micro-cutting force in both a convenient and practical way. Experiments show that the sensor can not only detect micro-cutting force, but also provide a feasible experimental method for the mechanism study of micro-fabrication.
Modular Code, Combination and Database Management of NC Spiral Bevel Gear Machine Tools
Authors: Li Qing , Li Dian Peng , Wang Tai Yong , Hu Miao , Xiao Xin Hua , Geng Bo
Published: February 2011

This article will introduce modular design theory of the NC (Numerical Control) machine tools for spiral bevel gear. Code the module in accordance with relevant principles. Propose the method of module combination. Standardize the structure of module data. Realize integrated management of machine tools module with the modular search method based on Fuzzy Pattern Recognition.
Study on Work Form and Architecture of Collaborative Product Developpment System
Authors: Liu Rui Su , Wang Xi She , Qin Yu Xia
Published: February 2011

Globalized market competition and the development of information technology have forced enterprises to adopt suitable products development models. It is a hot research topic and has a wide application prospect and practical value that how to do both to ensure internal product development in mass customization premise, but also to achieve inter-enterprise collaborative development network. In this paper, product modeling, collaborative product configuration method, the configuration process and the collaborative design of products were studied, collaborative product development system - CPDS collaborative product development system." Web-based was developed. In this article, the work form of collaborative product development system, configuration structures of CPDS, and function of composition were main studied, and the general idea of system implementation CPDS was given.
Design and Implementation of a Linear IC Based Low Cost Digital Tachometer for Laboratory and Industrial Application
Authors: Ferdous Shah Muhammad , Rokonuzzaman Mohammad , Ovy Enaiyat Ghani , Hoque Md. Ashraful
Published: February 2011

Any adjustable speed drives uses an incremental shaft encoder or a sensor and an electronic circuit for rpm as well as velocity estimation. The usual method of counting pulses generated by encoder or sensor in a fixed period of time produces a high precision velocity or rpm estimation in the high speed range. Tachometer plays a vital role in measurement of rpm of any rotating device and it is essential for any control system especially in servomechanism. Most of the controllers employed in the industry to control industrial process use a tachometer which gives the provision of feedback in a control circuit. The purpose of the project was to develop a digital tachometer using low cost linear digital ICs those are readily available in the markets of Bangladesh. This tachometer can be easily used for both industrial and laboratory purposes where it should be able to measure rpm and provide a voltage proportional to the speed of the shaft of the rotating device. At the same time efforts have been taken to reduce the cost of the tachometer as much as possible.
Hydraulic Support Development Based on Virtual Prototype Collaborative Development Platform
Authors: Wang Cheng Long , Zeng Qing Liang , Liu Zhi Hai , Wu Xiao Wang
Published: February 2011

In this paper, based on virtual prototype Collaborative Development Platform for Hydraulic support, a new technology way to the design and study of the mining hydraulic support is provided.The function constitute of the platform which can support the whole multi-disciplinary collaborative development procedure of Hydraulic support are given. The Development of Hydraulic support based on virtual prototype Collaborative Development Platform is given, which includes the following key steps: Team member management modeling, Process management modeling and Co-simulation. The development of hydraulic support shows the effectiveness of the virtual prototype collaborative development for hydraulic support.
Analysis Method for Commonality of Module and Part in Modular Product Family
Authors: Wang Shuai Feng , Hou Liang , Wang Hao Lun , Lin Wen Guang
Published: February 2011

An analysis method for commonality of module & part in modular product family was put forward. The part and module commonality in module layer and component part layer of product family were identified, respectively. The formulations of the two commonalities take into account amount of component part or module, variety, volume, price/cost of the part or module, size, geometry, material, manufacturing process, assembly. According to the source of parts, the mathematical formulas of self-made parts and purchased parts were set up respectively in the component part layer. Finally, an example of drive axle of wheel loader was given to indicate the effectiveness of the proposed method.
Development of Reciprocating Air-Cool Oilless Compressors Series Product
Authors: Zhu Yu Feng
Published: February 2011

Research and development are made about reciprocating air-cool oilless compressors series products in order to meet maket demond. Piston pings and guiding pings are made by filled PTFE material to achieve the oilless lubrication between cylinders and pistons. Grease lubrication bearings are used and designed in structure to achieve the oilless lubrication of connecting rod larger heads, connecting rod smaller heads and main bearings. The optimal dynamic balance can achieve by a new-type dynamic balance system which are made up of inner balance weight and outer balance weight to make the compressor run stationary. The crankcase bottom are all opened, three-stage fans are used to cool the compressor, these make the compressor cool better to improve the compressor life. The radius-length ratio λ is taken as 1/6 to 1/7 to reduce side pressure greatly. The reciprocating air-cool oilless compressors series products have better properties, can run smoothly and reliably and go into mass production.
Automation of Design and Analysis in Simulation System for Rough Rolling Process of H-Beam
Authors: Li Chuan Yu , Zhang Qin He , Ma Ru Po , Dong Bao Tian
Published: February 2011

In view of present problems that interior information of H-beam in multi-pass hot rolling process is not clear enough, an integrated simulation system with automatic design and analysis is developed based on ABAQUS Scripting Interface. Architecture of simulation system is designed according to the process of rough rolling, and several key problems are illustrated in the paper. The reliability of the system is verified through the forming simulation of H-beam H250x125. The system is very helpful for experienced mill designers who are unfamiliar with finite element analysis to test new section designs through virtual hot rolling trials.
Innovative Evolution Process Model of Product Platform Based on Evolutionary Design
Authors: Wang Qi Liang , Hou Liang , Wang Hao Lun
Published: February 2011

In order to grasp the direction of product upgrading and promote the innovation capability of enterprise, a model of innovative evolution process for Product Platform is proposed based on Evolutionary Design. The model consists of five parts. The product platform module genes expression is an important part of this model, the acquisition and operation of genes was highlighted during its evolution process. Finally, a sample was given expressing the method as mentioned before.
The Designing and Manufacture of Rear Mounted Fluid Coupling Transmissions for Deceleration(YOCHJ1000/1500/700)
Authors: Shao Wan Zhen , Zhang Ming Yun , Zhang Lei
Published: February 2011

This article introduced a method of designing rear mounted fluid coupling transmissions for deceleration with heavy power, as well as innovation in its architecture and difficulty in manufacture. All of these are valuable for the designers and researchers in fluid coupling transmissions. On the other hand, we have combined finite element method and computer science in the stress analysis of pump wheel, which shows consistent result in the calculation and practical use.
Modern Machinery Products Adaptability Vague Comprehensive Evaluation
Authors: Xin Zhi Jie , Guo Hu
Published: February 2011

Modern mechanical products through comprehensive appraisal target analysis, adaptability of product evaluation model can be established. The NC Arc teeth gear milling machines, for example, applies multistage fuzzy synthetic evaluation methods, has carried on the synthetic evaluation to the product adaptability, provide the instruction for the modern structural design and the re-engineering.
Study on Grinding Methods of Different Shape Turning Tool Rake Face
Authors: Hou Hong Ling , He Ning
Published: February 2011

Because of the chip breaker, the rake face of turning tool differs from one another. It is studied that different shape rake face have an important influence on sharpening intensity under the same rake angle in the paper, the results showed curved rake face is better to plain face. Otherwise because chip breaker is assigned to the rake face, the grinding is not only sharpened rake face, but also chip breaker is grinded too. How to ensure degree of finish and dimension of chip breaker sharpen is important, the corresponding method is introduced in detail in the paper.
Application of Quality Early Warning System Base on Web Form Design
Authors: Sun Li Bo , Guo Shun Sheng , Li Yi Bing , Guo Jun , Wu Si Qi
Published: February 2011

Aiming at the quality early warning problem of manufacturing process, this study develops a quality early warning system base on Web form design, combining some auto parts companies operating practice. In addition, it analyses the design principle and application methods of the system. It has been proved that the system achieves real-time monitoring, diagnosis, early warning to abnormal volatility, and prevents the defective products from occurrence and outflow, and gives corresponding diagnosis views to abnormal fluctuations according to historical data. It has been proved that this system is effective in practice.
Theoretical Calculation of Negative Skin Friction for Pile Foundation in Layered Soil
Authors: Chen Shang Ping , Yao Wen Juan , Zhu Sheng Qing
Published: February 2011

In this paper, based on pile-soil interaction, the calculating method for the negative skin friction of pile in layered soil is proposed. Two load conditions, axial load on the top and overloading on soil around pile are presented, respectively. The transfer matrix method is used to analyze the first condition, while the soil consolidation theory and finite difference method are used to investigate the second condition numerically. The results can offer valuable references for both theoretical research and engineering design of long pile bearing larger negative skin friction.
Nonlinear Finite Element Analysis of Super-Long Pile and Soil Interaction in Soft Soil
Authors: Chen Shang Ping , Yao Wen Juan , Zhu Sheng Qing
Published: February 2011

In this paper, a nonlinear three-dimensional finite element model for super-long pile and soil interaction is established. In this model, contact elements are applied to simulate the nonlinear behavior of interaction of super-long pile and soil. A nonlinear elastic constitutive model for concrete is employed to analyze stress-strain relation of pile shaft under the axial load and the Duncan-Chang’s nonlinear constitutive model is used to reflect nonlinear and inelastic properties of soil. The side friction resistance, axial force, pile-tip resistance, and developing trend of soil plastic deformation are obtained and compared with measured results from static load tests. It is demonstrated that a super-long pile has the properties of degradation of side friction resistance and asynchronous action between side and pile-tip resistance, which is different from piles with a short to medium length.
Effect of Tidal Fences on the Stress and Deformation of Bridge Structure
Authors: Zhang Zhao De , Cheng Zhen Xing , Sun Zhong Jian , Tang Zhi Bo
Published: February 2011

Traditionally, independent dam or tidal fences in the sea should be built before the tidal energy electric power generating. In the near future, more and more cross sea bridges will be constructed between the mainland and the islands in the east of China, or between the islands. If the tidal fences are designed to be installed on these bridges, much investment will be saved than constructing tidal fences independently. But it will increase the loads of the bridges. Considering the bridges with or without tidal fences installed, three types of cross sea bridge models are built numerically. The stresses and deformations of the bridge structures are calculated. And the effects of the fences on the bridge structure are evaluated. The results may be useful for the designing of cross sea bridges and power generating device of tidal energy.
Process Parameter Experiments on Vacuum Casting Using a Silicone Rubber Mold for ABS Plastic Parts
Authors: Chang Dar Yuan , Deng Chyn Shu
Published: February 2011

Silicone rubber mold is one of soft mold processes for rapid tooling. Based on a master pattern, it can be used for casting the materials of wax, plastic, and low-melting metals directly during a short developing time, very suitable for sample fabrications. This paper conducts vacuum casting experiments by Taguchi’s method to derive the optimal parameter selections on ABS plastic vacuum casting using a silicone rubber mold. The factor that affects pouring characteristics maximally is the mold vacuuming time.
Multi-Dimensional Vibrating Screen Design and Motion Analysis
Authors: Wang Cheng Jun , Ma Lv Zhong , Li Yao Ming
Published: February 2011

a kind of multidimensional vibrating screen has been developed by the author in order to improve the screening efficiency of material. The paper introduces the structure composition and functional properties of multidimensional vibrating screen. The structural performance parameters such as degree of freedom, virtual constraint and coupling degree of the main mechanism have been calculated. And the motion performance of the multidimensional vibrating screen has been analyzed. Meanwhile the kinematics equation is established. This kind of multidimensional vibrating screen not only has concise structure and better symmetry and decoupling performance, but also improve the dispersion and leaking screen effect obviously compared with traditional vibrating screen.
3D Model Retrieval Based on Fuzzy Weighted Shape Distributions
Authors: Chen Zeng Qiang , Zou Kuan Sheng , Ip Wai Hung , Chan Ching Yuen
Published: February 2011

Shape distribution is considered as a kind of art state 3D model retrieval algorithm due to its simplicity, robustness, and not need model pretreatment. Its disadvantage is that the retrieval precision is not high enough. Despite the introduction of five kinds of shape functions, each of which can not sufficiently expresse the 3D models. This paper uses the D2 distribution, the improved D1 distribution and the total surface area method to retrieve 3D models respectively. Then give weights to each method after unitary them. Set fuzzy rules are set to decide the fuzzy weights of three methods according to the mean proportion and variance proportion, Experimental results show that this algorithm can improve the retrieval results significantly.
Recovery of Niobium from Baogang Tailings by Carbochlorination
Authors: Zhao Tuan , Lin Hong Tao , Li Bao Wei , Cang Da Qiang
Published: February 2011

Carbochlorination of niobium in the tailings of Baogang concentrator was experimentally studied, and the activated carbon was used as the reducing agent and chlorine gas as the chlorinating agent. The effects of the reaction time and the temperature on chlorination rate of niobium in tailings were investigated. The result showed that when the tailings were chlorinated at 800 for 2 h,96.15% of niobium was yield.
Study on Preparation Process of Zinc Ferrite
Authors: Ma Shao Jian , Wang Gui Fang , Yang Jin Lin , Que Shao Juan , Tang Li Qun , Feng Jin Peng
Published: February 2011

Zinc ferrite is usually formed during the roasting of zinc sulfide concentrate with high content of iron and reduces zinc recovery during the leaching of zinc calcine. Because it is difficult to find pure zinc ferrite in nature ore resources or in chemicals market, which impedes the investigation of the reaction characteristics of zinc ferrite and the seek of new technologies for zinc ferrite dissolution, so it is of significance to obtain relatively pure zinc ferrite for further research on zinc calcine leaching. This article investigated the preparation process of zinc ferrite based on the dissolution characteristics of a zinc calcine with 19.38% iron and put forward a method to judge the reaction end point during the leaching of zinc calcine to produce zinc ferrite. The results show that the product of zinc ferrite could be prepared through recovering the leaching residue during leaching the zinc calcine under the initial H2SO4 concentration equal to or larger than 160g/L, and that the leaching end point can be judged by comparing the experimental curve of Zn leaching with the zinc theoretical dissolvability curve.
Optimal Control for Quality Indices of Heat Furnace
Authors: Chen You Wen , Chai Tian You
Published: February 2011

Heat furnace is one of the most important parts in iron and steel industry which is one of the basic industries. The control of furnace quality indices has a direct impact on iron and steel qualities and energy consumptions in an iron and steel manufacturing process. Due to dramatic changes of exhaust gas in combustion, this multi-variable process becomes time-varying, and also has inherent nonlinearities, couplings among the variables, large inertias and time delays.Therefore, manual operations are still being widely used in quality indices control. In this paper, an optimization control method is proposed for the control of furnace quality indices. The optimization consists of a materials temperature calculation model, an optimization objective, an ideal materials heating model and a furnace heating model. Optimization algorithm consists of the maximum principle, the simulated annealing algorithm，the iterative algorithm and sensitive analysis.Finally, quality indices were controlled by lower layer loop control on-line.The proposed optimization control method has been successfully applied to some steel plants. The industrial applications show the effectiveness of the proposed method.
Research on High-Temperature Properties of Typical Iron Ores Used in China and its Blending Optimization
Authors: Wu Sheng Li , Dauter Oliveira , Dai Yu Ming , Xu Jian , Chen Hong
Published: February 2011

High-temperature properties of 10 samples of iron ore from Brazil, Australia and China were measured. Several conclusions were made based on these experimental results. Assimilability of Brazilian ore, Australian ore and Chinese ore concentrate were low, high and medium, respectively. Optimal fluidity of liquid phase was observed in 2 types of Brazilian ores (BR-B, BR-C), 1 type of Australian ore (AU-C) and 1 type of Chinese ore (CH-D). For self-strength of the bonding phase, Australian ore presented low levels, while Brazilian and Chinese ore presented high levels. According to the experimental results of high-temperature properties of iron ore, schemes of ore blending optimization were designed and sinter pot test using these blends were performed. The results indicated that ore blends composed of 30~45% Brazilian ores + 25~50% Australian ores + 20~30% Chinese concentrates presented excellent sintering results, considering both the performance of the processing and quality of the sinter. Therefore this experiment has proved that ore blending optimization combining high temperature properties can lead to more efficient sintering mixes.
Densification of Vanadium Nitride by Microwave-Assisted Carbothermal Nitridation
Authors: Pan Hui Juan , Zhang Ze Biao , Peng Jin Hui , Zhang Li Bo , Li Wei
Published: February 2011

A microwave carbonthermal nitridation method under the condition of nitrogen at atmospheric pressure was used to the synthesis of vanadium nitride from vanadium pentoxide and carbon black. In the present work, the effects of synthesis temperature, flowing rate of nitrogen, heating rate and soaking time on the apparent density and the nitrogen content of the microwave sintered samples were studied. The experimental data indicated that the apparent density and the nitrogen content of the microwave sinter sample was 4.1 g/cm3 and 13.8 %, respectively under the optimum conditions of flowing rate of nitrogen 50 L/h, heating rate of 6 °C/min to 1400 °C and soaking time of 50 min. The denser pellet was preferred to generated in the centre of the samples of which was beneficial to the expulsion of stoma and the diffusion of nitrogen due to the opposite temperature gradient compared with traditional heating.
Virtual Processing Research on Auto Control Valve Cylinder Mold
Authors: Xu Ping , Ma Kun Peng , Wang Shao Feng
Published: February 2011

Especially from the perspective of geometric simulation, through the combination of CAD/CAM software Pro/e with professional numerical control machine tool simulation software Vericut, achieve the virtual processing of cylinder mold. Numerical control programs will be transferred to the virtual machine tool, producing products meet the requirements. Proving the combination of Pro/e and Vericut for the research of virtual machine technology is a possible method.
Effect of Mechanical Activation on Extracting Indium from Neutral Leach Residue of Zinc Calcine
Authors: Zhang Yan Juan , Li Xuan Hai , Pan Liu Ping , Wei Yan Song
Published: February 2011

This study was concerned with the effects of mechanical activation (MA) on structural characterization for neutral leach residue of zinc calcine (NLR) and kinetics of indium extraction from NLR in sulphuric acid. The X-ray diffraction (XRD) analysis showed that MA caused the decrease in crystalline phase and increase in lattice distortion. The activation time, reaction temperature and H2SO4concentration had positive effect on indium extraction from NLR. The activation energies of the unactivated, milled for 30 and 60 min NLR samples calculated for indium extraction were 39.3, 32.1, and 30.4 kJ/mol, respectively, which indicated that MA increased the leaching kinetics of indium extraction from NLR. The empirical orders of the unactivated, activated for 30 and 60 min samples for extracting indium with respect to H2SO4concentration were 0.52, 0.51, and 0.51, respectively.
Study on Process of Microwave Magnetizing Roast for Low-Grade Hematite
Authors: Li Jie , Li Bao Wei , Zhang Bang Wen , Wang Lei
Published: February 2011

The microwave magnetic roasting process of low-grade hematite under low temperature was studied experimentally. The effects of roasting temperature, carbon content and roasting time on the reduction and magnetic separation were investigated. It shows that the best percent reduction is 10.96％(near to theoretical value 11.11%)which can be obtained under the condition of roasting temperature of 650°С , carbon content of 1.0% and roasting time of 10 minute. The results of magnetic separation show that the best magnetic separation grade for the sintered ore occurs at 570 instead of 650°С owing to the sintering of ore powders at high temperature of 650°С . Further ball-milling and magnetic separation of this concentrate produces two kind of final concentrate, one of which is in grade 65.6% with the recovery being 45.3%, and the other is in grade 63.4% with the recovery being 62.6％. After the magnetic separation, concentrate ore meets the iron-smelting requirements because of its low S and P content and high grade. This magnetic process results in the enrichment of RE and Nb in tailing ore, which can be reused for the extraction of Rare Earth and Nb.
Pattern Search Method and Artificial Neural Network Prediction of Double Ellipsoid Heat Source of Submerged Arc Welding
Authors: Li Pei Lin , Lu Hao
Published: February 2011

For the selection of the double ellipsoid heat source parameters, the thermal cycle of different process was measured and compared with the simulation result. The experimental results were according to the actual conditions and the simulation results were obtained by finite element method. The sensitivity of heat source parameters was discussed. Pattern search method was used to obtain the most accurate parameters corresponding to the specific process. By summarizing all of the processes of experiment, the relationship between the experimental process parameters and the corresponding double ellipsoid heat source parameters was obtained. The artificial neural network algorithm was applied to predict the relationship between all possible process and the double ellipsoid heat source parameters. The verification experiment showed that the prediction model was accurate.
Analysis, Design and Simulation of the Biomimetically Facial Material on the Humanoid Robot
Authors: Wang Ching Kuo
Published: February 2011

This paper is dedicated to self-handcraft an inexpensive, however, anthropomorphic robot face on the viewpoint of ryodoraku craftsmanship instead of the traditionally engineering viewpoint. Generally speaking, artificial emotions can be categorized into three stages. i.e., the preliminary abstraction, secondary expressionism, and advanced anthropomorphism. In this paper, biomimetic material is fabricated and mixed with the hypodermic mechanisms. Dynamic analysis and computer simulation of the inventive mechanisms are proposed to simplify the mechatronic design of each artificial module on the self-fabricated robot head. Thus, delicate variations of the facial emotions can dramatically spiritualize the humanoid robot with passionate scenarios. Finally, the ryodoraku simulations with PTZ(pen-tilt-zoom) dynamics are carefully examined and successfully demonstrated the advantages of the proposed innovation.
Research on Assembly Variant Design Based on Complex Network
Authors: Xu Kun , Liu Fu Yun , Li Guang
Published: February 2011

To realize the variant design of assembly containing standard component, both type characteristics and parameter characteristics of standard component are studied. With complex network theory, the parameters of assembly are analyzed. A method of assembly variant design is presented. UG (Unigraphics) is re-developed with VC++ and UG/Open. A variant design module is developed, and assembly variant design is realized.
Developing and Research on Motor Driving System of Wheeled Mobile Robot
Authors: Chang Rui Li , Han Jun
Published: February 2011

In this paper, according to the wheeled mobile robot with three wheels, the motor driving system of robot is researched. Based on robot kinematics and dynamics, a motor driving system of wheeled mobile robot is designed and developed. The results of experiments show that the system is steady and reliable at work, and it is very useful in practice.
Analysis and Design of Lower-Mobility Parallel Mechanism of Non-Symmetrical Based on Variable Topology Theory
Authors: Cui Rong Jiang , Guo Zong He , Yin Zi Xun , Zhu Song Song
Published: February 2011

First, the branched-chain of parallel mechanism was Classified according to reciprocal screw theory. Then, the introduction of variable topology mechanism theory, with the characteristics of parallel mechanisms themselves, the definition and basic variable topology means of variable topology parallel mechanism were given. With evolutionary theory, the method to design lower-mobility parallel mechanisms of non-asymmetric was proposed based on variable topology mechanism theory .Taking 3-RPS as ideal mechanism and topology synthesis was carried out, besides 2-RPS mechanism were analyzed. The introduction of variable topology mechanism theory provided a theoretical basis and innovative approaches for the synthesis configuration of Lower-mobility parallel mechanisms of non-asymmetric.
Line Segment Nearest Neighbor Query of Spatial Database Based on R*S-Tree
Authors: Sun Dian Zhu , Sun Yong Wei , Kang Xin Cai , Li Yan Rui
Published: February 2011

An algorithm for nearest neighbor query of Line Segment based on the R*S-tree is proposed. The dynamic spatial indexing structure for spatial line segments was constructed based on the R*S-tree, and the k-nearest neighbor of the target line segment were obtained by the hollow ball. The distance between the target line segment and the neighbor line segments was computed, and the neighbor line segments were sorted by the distance. The result shows that the algorithm can obtain nearest neighbor line segment accurately and effectively and has the strong adaptability of data type.
Based on Least Square Method for Spray Partition of Complex Curved Surface
Authors: Zeng Yong , Gong Jun , Sun Tao
Published: February 2011

We attempt to resolve the spray trajectory planning efficiency and the coating thickness uniformity for big curvature surface on complex curved surfaces. The least square method was proposed for spray partition of complex curved surface based on topology partition. First, the big curvature surface was extracted from complex curved surfaces. Then, the big curvature surface was fitted into the natural quadric surface based on least square method and the fitting algorithm was given. Simulation results show that, the fitting algorithm is feasible, and this method can effectively reduce the number of patches, which can improve the spray trajectory planning efficiency and the coating thickness uniformity.
Study on the Optimum Choice of Cutting-Tools in NC Machining Based on the Polychromatic Sets Theory
Authors: Liu En Fu , Liu Xiao Yang , Fang Yi Xiang , Li Zong Bin
Published: February 2011

Based on the polychromatic sets theory, a relational model of cutting-tool choice was established, which was shown with a contour Boolean matrix. Through the coloring logical operation, the cutting-tools candidate set was calculated to meet machining conditions. With the candidate cutting-tools set, the fuzzy optimization was made for every part feature. And with considering the effects of the time of cutting-tool exchange, processing sequence and other relevant information for the selection of cutting-tool, the choice of cutting-tools is optimized as a whole during machining.
Research and Implementation of an Expert System for Fault Diagnosis of Fan Based on Knowledge Rule
Authors: Wang Lei , Sui Tian Zhong , Song Yu , Zhao Hai Xiang , Zhuang Bo Ran
Published: February 2011

An example of the rule-based expert system applied to the fan fault diagnosis is presented. The architecture and function of the fault diagnosis system are introduced. The expression of the fault diagnosis knowledge and the attribute of knowledge base based on the relational database have been studied. The hybrid reasoning technology was applied to the implementation of the diagnosis inference engine in the expert system. The presented fault diagnosis system is easy to modify the knowledge base with the experience accumulated in practice, and it has the advantages of expansibility, portability, concision, and high efficiency.
The Research of Speckle Technique in Deformation Measurement Fields
Authors: Chen Zhi Xin , Liang Jin , Guo Chen
Published: February 2011

The traditional deformation measurement have many limitations, According to actual measurement need, it is requested not only comprehensive, flexible, high-precision, but also can describe the various points displacement within the measurement scope at any time, get the most comprehensive data. In this paper, used speckle methods to carry on deformation accurate and comprehensive measuring. First, compared with traditional methods, showed its many advantages, including: non-contact, high precision, operation simple and flexibility, etc. Then specified the main basic theory of the speckle method, established relevant mathematical models, developed the appropriate measurement and analysis software XJTUDIC, and used the software with the appropriate hardware equipment to test a specific tensile deformation process, and compared the results with using traditional extensometer measurement methods, through calculation got the error is within ± 0.2%. This fully validated the method and corresponding software and hardware were reliable, feasible and excellent.
Smith Predictor Based on Predicting Induced-Delay
Authors: Li Shu De , Chen Yi , Liu Cai Xia
Published: February 2011

Since communication network is introduced into control system, induced-delay appears. Because of the delay, the performance of networked control system becomes bad, even unsteady. Conventional Smith predictor is sensitive to error in object model and needs delay’s value in advance. Regarding random delay, its application is limited. In this paper, we propose a method based on induced-delay predicted by BP neural network, which use two historical delay values to predict the next one. Smith predictor adjusts its parameters according to that value in time. The simulating results indicate that the precision of delay-predicting can be ensured and the performance of networked control system has been improved.
Research of the SMT Product Character Segmentation Based on Contour Feature
Authors: Zhao Hui Huang , Zhou De Jian , Xu Yu Ming
Published: February 2011

The principles of the Surface Mount Technology (SMT) product character segmentation and its technology could be described as following: SMT product character image is obtained by image sampling equipment and its ideal binary images is got after image processing. In order to segment the SMT product character effectively, a novel character segmentation algorithm is proposed based on contour feature. Three kinds of information are extracted, one is the up contour feature, another is the under contour feature, the third is the width and the height of the image. Then the position of character segmentation is determined according to the width and height of single character, and character segmentation can be accomplish according to its up contour feature and under contour feature. By analyzing the test result, the proposed approach has excellent properties in character segmentation.
Research on the Spatial Error Distribution Model of Flexible Coordinate Measuring Machines Based on Support Vector Regression
Authors: Zheng Da Teng , Fei Ye Tai , Hu Yong Gang , Yang Rui Chang
Published: February 2011

One of the main reasons on Flexible Coordinate Measuring Machines’ (FCMM) less application is that its accuracy can’t meet the practical requirements. The spatial error distribution model of FCMM is build using Support Vector Regression (SVR) method. The test shows the data from the model can effectively fit the samples, and arguably the model based on SVR is feasible. The novel method gives an idea of studying the spatial error distribution model of FCMM. Futhermore, the model can provide reasearch foundations for definiting optimal measurement area and thus help to improve the measurement accuracy in the next work.
Performance Analysis of W Phase Detector in Galileo Signal Receiver
Authors: Li Ming
Published: February 2011

Galileo system is a new satellite navigation system. In this paper, a Galileo signal receiver based on W phase detector is presented. It can capture and track the Galileo signals. Moreover, it can also reduce location errors caused by the multipath signal when the delay is just small chip length away from the useful signal. At first, the principle of the traditional E-L phase detector and its anti-multipath performance is analyzed in this article. Finally, the forming method of the W phase detector waveform is introduced.
The Research on the Model of a Precision Magnetic Stage System
Authors: Zhang Yi , Sun Hui Zhi , Zhou Hong
Published: February 2011

This paper introduces the structure and work principle of a two-coordinate precision magnetic stage. “The same plane” mode and magnetic driver is adopted, on the basis of analytical field, and response simulation is finished. The experiments result expresses that the positioning accuracy of the magnetic stage reaches nanometer accuracy.
A Fuzzy Control Method in ACC of the Constant Interval Mode
Authors: Zhao Lai Gang , Chen Dao Jiong
Published: February 2011

Fuzzy control methods are widely used in Adaptive Cruise Control System as time passes by,but there are also various limitations for its membership and fuzzy rule acquisition, over-relying on experts’ knowledge. This paper presented one Sugeno method based on Mamdani using ANFIS(adaptive network-based fuzzy inference system)with optimized its memberships and training processes. Its experimental results revealed that it can be embeded into ACC much more appropriately and efficiently.
Study of Predictive Control in Industrial Networked Control System
Authors: He Fang , Li Xiao , Wang Qiang
Published: February 2011

In order to improve the performance of networked control system which has the characteristic of uncertain time delay, predictive control is adopted. The model of networked control system is analyzed. Take into account uncertain network time delay caused by various factors and problem of model mismatch, predictive controller is designed and simulation model of system is built using software of Matlab. A method of reducing model mismatch is proposed. Study results show that predictive control can make networked control system with good performance.
The Application of FPGA and DSP Techniques in Intelligent Wattmeter
Authors: Li Hui Rong , Pang Li Juan , Zhang Xue Feng , Deng Gang , Tong Yan Wei
Published: February 2011

According to the demand of data acquisition in power system, the intelligent wattmeter is constructed, which is based on DSP and FPGA as the data acquisition and processing system, meanwhile, the administration center of the intelligent wattmeter is based on single-chip computer 8051. With these, high speed, multi-point sampling, a large quantity accumulation and real-time calculation are realized. At the same time it reduces the effect of the measuring accuracy upon higher harmonic and the measuring accuracy could reach to 0.02 grade.
Optimal Design of the Thickness of the Multi-Layer Homogeneous Absorption Plates Based on the Max Absorption Coefficient of the Automotive Body
Authors: Zhu Cong Yun
Published: February 2011

In this paper, the thickness of the different layer of the multiple-layer homogeneous structure. is optimized designed on the condition that the absorption effort is the best Using the transfer matrix of sound pressure and particle velocity of each layer and the continuity condition at the interface between two lagers, the absorption coefficient of the multiple-layer homogeneous structure is deduced. According to the absorption coefficient, the thickness of different layer is optimized designed on the condition that the absorption effort is the best when the sound wave incident to the multiple-layer homogeneous structure with different frequency. In the last, an experiment is carried out, and the experiment results test the theoretical analysis is correct which can be applied to solve the same kind problem.
Ziegler-Nichols Based Intelligent Fuzzy PID Controller Design of a SPM System with Parameters Variation
Authors: Lin Jium Ming , Chang Po Kuang
Published: February 2011

This research is to extend Ziegler-Nichols based PID controller design method to the intelligent fuzzy PID controller design of a Scanning Probe Microscope (SPM) system, thus the relative stability can be reserved. In addition, one can see the hysteresis and parameters variation effects of the force actuator can be reduced. This improvement had been verified by practical implementation. Comparing the results with the design with the Ziegler-Nichols based PID controller, one can see that the proposed system is more robust.
Research of Channel Dismatch Errors in Parallel AD Acquisition System Based on FPGA
Authors: Shao Xing Ling , Yang Wei , Wang Zheng Yan , Zhang Wen Dong
Published: February 2011

With the development of modem broadband radar, amount of reaserchers focus on broadband radar echo signal acquisitions and feature extraction of the target. Due to the large bandwidth as high as several MHz, the time interleaved ADC system is playing an important in radar echo systems, but this structure will bring in channel dismatch errors. The paper gave an explicit analysis of such three channel mismatch errors, and established the formulas of spectrum when all three mismatch errors exist together. Then presented the measure errors algorithm combined three errors according to the formulas of spectrum and the effective calibration algorithm．The algorithm was implemented in FPGA at last.
Energy Saving Control System for Central Air-Conditioning Based on Terminal Temperature Measuring and Frequency Conversion Control Technology
Authors: Zhou Hong Yu , Chen Xiao Jian , Chen Zi Hu , Tong Ming Wei
Published: February 2011

In view of the insufficiency of central air-conditioning system that FCU, water pumps and air blower’s movement connot match with the actual operating load when varying duty, an energy saving control system for central air-conditioning based on terminal temperature measuring and frequency conversion control technology is proposed. This system can real-time measure different floors’ and nods’ temperatures in the building, and export orders to control the frequency of FCU, chilled water pump, cooling water pump and cooling tower air blower. To overcome big delay, large inertia and variable condition of control object, the dnamic fzzy nural network algorithm(DFNN), is applied into the control system. According to the practical running situations, the energy saving control system has advantages as high energy saving rate, high stability, good maintainability, which may be promoted the application vigorously.