bluuebunny/crossref_metadata_2025 huggingface dataset:
A Fuzzy Programming Model of Supplier Selection
Authors: Jiang Hua , Lu Zhi Gang
Published: February 2012

An integrated supplier selection problem under fuzzy environment is studied in this paper. Firstly, the linear weight method is used to calculate the scores of suppliers according to their different attributes, such as: quality, service, warranty, delivery, reputation and position, which are assumed as fuzzy variables. Secondly, a fuzzy expected value programming model and a fuzzy chance-constrained programming model are proposed to select the best combination of the suppliers and determine the order quantities. A hybrid intelligent algorithm, based on fuzzy simulation, genetic algorithm and neural network, is used to solve the two models. Finally, a numerical example is given to illustrate the effectiveness of the proposed models.
An Adjustable Voltage Signal Filament Conversion Alarm System
Authors: Zhang Bao Feng , Yang Jin Feng , Zhu Jun Chao
Published: February 2012

A new adjustable voltage signal filament conversion alarm system is proposed which based on the traditional conversion monitoring system of train signal filament. This system adopts the embedded DSP processor monitoring the state of filament and uses the DSP to control PWM (Pulse-Width Modulation) duty cycle for preheating the filament，then gradually lit it. It avoids the breakdown of the filament break. The power line carrier technology is used for alarming signal transmission. This system is more practical than the traditional, which shortens filament switch time and improves the alarm accuracy.
Design and Analysis of the Cam Profile for Rotary Piston Engine Based on High-Order Polynomial
Authors: Zhang Lei , Pan Cun Yun , Xu Hai Jun , Zhang Xiang , Sun Chang Xin
Published: February 2012

Rotary piston engine is a new kind of engine, which is still under development. Based on the kinetic characteristic and the special structure, a valve track was established using high-order polynomial method under the requirement of maximum fullness coefficient. Rotor was fixed after applying a reverse motion on the mechanism. Cam profile was built by coordinate transformation. A 3-dimension model was built and then it was imported into ADAMAS in order to study its kinematics behaviors responding to a specified motion .And the result shows that the method we take is effective; the cam profile has a ideal fullness coefficient, a continual acceleration, no hard or soft impact, and it could easily satisfies the requirement of the design of valve train.
A Novel Sliding Mode Control Base on Synchronization Error for Parallel Robot
Authors: Gao Guo Qin , Wang Wei , Niu Xue Mei , Zhou Hai Yan
Published: February 2012

Relative to serial robot, parallel robot gets more and more attention of scholars because of its many advantages. However, there are some problems in the current research such as the chains’ coordination and coupling control, which has became one of the key problems in the motion control of parallel robot. To further enhance the motion control performances, a novel sliding mode control method base on synchronization error is proposed in this paper. The simulation and experiment results show that the designed control system has good tracking performance, small system error and strong robustness, which can satisfy the high-precision requirements of the parallel robot control.
An Effective Solution for Trademark Retrieval by Combining Pseudo Zernike Moments and SIFT Features
Authors: Wang Zhen Hai
Published: February 2012

This paper proposes a trademark retrieval algorithm combining the image global features and local features. Firstly, extract pseudo Zernike moments of the retrieved image and sort them according to similarity. Candidate images are formed. Then, the SIFT features are used for matching the query image accurately with candidate images. Experimental results show that this method not only keeps high precision- recall of SIFT features and is superior than the method based on the single pseudo Zernike moments feature, but also improves effective retrieval speed compared to the single SIFT features. This method can be well applied to the trademark image retrieval system.
Design and Experimental Research on the Sealing Structure of High-Pressure Gear Pump
Authors: Bai Ping
Published: February 2012

Due to great pressure difference between inlet and outlet, high-pressure gear pump can cause unbalanced radial force, which results in serious wearing between axle journal of drive shaft and bearing-hole, non-ideal dynamic characteristics, and drop of volumetric efficiency after long run. This paper introduces a new sealing structure. Based on this structure, a high-pressure oil reservoir is installed on the wall of the inner-hole of floating plate for radial support and lubricating, which can effectively reduce shaft wearing and noise, and improve working dynamic characteristics of high-pressure gear pump.
Design of Width Measuring Instrument for Needle Roller Bearing without Inner Ring
Authors: Deng Qi , Zhang Ren Jie
Published: February 2012

Design of width measuring instrument for drawn cup bearing without inner ring.The instrument used inductive displacement sensor converting width variation into voltage output of sensor. The measuring system which used AT89S52 as control chip excellently adapted to the requirment of fast production beat and the human-computer interface was developed by using VB. The instrument was practical that can accurately measure width of the bearing, and meet the production requirment.
Experimental Study of Electrical Discharge Grinding Honeycomb Tori
Authors: Gao Ji , Ma Xiao Fang , Liu Qing Yang
Published: February 2012

Through the research of domestic and international aviation engine seal pieces, this paper have described the structure and technological design of electrical discharge grinding honeycomb torus. Based on experimental analysis of processing precision and processing efficiency under different electrical parameters, machining sections were designed according to the processing requirements of different parts. The results indicate that the machining precision and efficiency can be enhanced greatly.
Application of a New Heave Compensation System for Deepwater Hardware Installation
Authors: Li Zhen Lin , Sun Hong Feng , Duan Meng Lan
Published: February 2012

In order to minimize the adverse effects of the vessel’s heaving motion on offshore operations, this paper presents a Composite Heave Compensation System for deepwater hardware installation, which overcomes the shortcomings of conventional Heave Compensation System.
Research on the Inlet Pressure Accurate Control Method of the Nozzle for the Single-Jet Nozzle Tester of Aero Engine
Authors: Wang Ye Mu , Wang Jie
Published: February 2012

This paper introduces the closed loop pressure computer control system which is suitable for the environment of kerosene medium. The system can satisfy the technical requirements of the pressure regulation in the test of the single –jet nozzle of aero engine , the pressure can be accurately controlled and its control precision is within ±0.01MPa. It indicates the principle and composition of the hydraulic system and computer measurement and control system. The paper introduces the design method and treatment process of the key technology, which includes the use of a proportional relief valve and a fixed throttle hole in hydraulic system, the use of PID control in closed loop control system, the use of high precision sensor and measurement method by grade in measuring system and the use of 24V precision steady voltage source. In the same time it indicates the actual application of the closed loop pressure control system.
New Technology and Applications on Passive Millimeter-Wave Sensors
Authors: Jin Li
Published: February 2012

Some new technology and applications on passive millimeter wave (pmmW) sensors are reviewed. The development of passive millimeter wave imaging sensors, operating at W band, that are currently being manufactured for commercial markets using standard automated assembly processes. is described. The focus was to adapt the night vision passive thermal infrared imager performance models and apply them to pmmW imaging systems for prediction of field performance for the task of small watercraft and boat identification. A novel method of human presence detection using pmmW sensors is presented. The method focuses on detecting a standing human from a moving platform in a cluttered outdoor environment using pmmW radiometry. Finally the research and development in passive millimeter wave imaging and performance improvements is discussed. The future passive millimeter wave sensors are expected.
The Numerical Simulation of Residual Stress in the Diffusion Bonding Joints by Different Coefficients of Linear Expansion
Authors: Song Min Xia , Zhao He
Published: February 2012

The numerical simulation of residual stress in the joints of Ti-6Al-4V and ZQSn10-10 sleeve structure when Cu and Ni as interlayer was carried out by ANSYS. The results indicate that the residual stress harmful to the joint appears in the narrow zone adjacent to Ti-6Al-4V side where intermetallic compounds formed and sharply concentrates on the top and bottom surfaces due to edge effect. When Ni as interlayer, the stress distribution resembles that of Ti-6Al-4V/Cu /ZQSn10-10 joint, larger than the value when Cu as interlayer. It is beneficial for the residual stress dropping, when the suitable interlayer adopted. For interlayer, the linear expansion coefficient is close to the base metal and modulus of elasticity is small.
Development of an Adaptive Mobil Front-Lighting System Using Multi-Functional Sensors
Authors: Hung San Shan , Chang Hsing Cheng , Yi Chia Yu
Published: February 2012

The main purpose of the paper is using multi-functional sensors to detect the vehicle attitude (the tilt angle of vehicle), and many other vehicle information. Combining all the information, the adaptive front-lighting system can achieve the real-time control of the pitman arm and yaw angle for automobile headlight system. The feasible control methodology could highly enhance the safety of driving and electronic additional value in automobile industry. In the paper, various conditions of HID (High Intensive Discharge) headlight system could be controlled, such as the control of pitman arm and yaw angle, are widely discussed. In the pitman arm angle control, we use G-sensor to detect the unbalanced vehicle caused by load, rugged road, uphill and downhill. Finally, combining the velocity obtained from the ECM (Engine Control Module), the leveling motor control for headlight pitman arm angle real time and adjust will be realized. On the other hand, we use the potentiometer and micro switch to sense the direction and quantity of steering wheel angle, the swivel motor control for headlight yaw angle real-time adjustment is completed.
Multi-Level Recommendation for Sketch Based 3D Toy Modeling
Authors: Zhu Guang Yu , Wang Jin , Lu Guo Dong
Published: February 2012

Models recommendation is always a key part in part-composition system based on sketch. In this paper, proper models are suggested via three steps. Firstly, the possible type of model parts is suggested according to the topological features. Then toy parts that have similar profile types with the inputted sketches are clustered and recommended by lineage clustering method. Finally, based on the promoted $1 recognizer, the suggested parts are sorted according to the shape similarity with the inputted sketch. Experimental results show that the models can be recommended quickly and properly via our method.
Assessment of Road Safety Barriers and their Effects on the Fatal Injuries Reduction in Iran
Authors: Tabatebaei Seyed Abbas , Rahman Ali , Khourani Hamid
Published: February 2012

Utilization of safety barriers is one of the most common methods for immunization of road sides. These barriers will redirect deviated automobiles onto the right path and will also prevent overturning and hitting dangerous obstacles. This will reduce fatality and injury. Regarding the roads condition to obtain more safety in Iran, this paper has concentrated on the safety barriers survey, and the behavioral based on their type, the road's condition and also related economical evaluation. To obtain the above mentioned aims, in addition to investigating the pre-performed study, surveys around the world and the current status of the safety barriers in the country, the preferred option will be chosen and then introduced based on the performed technical and economical comparing between two common barriers in Iran. Taking into consideration the executive facilities, and current technical and economical conditions.
Study of Tool Trajectory in Incremental Forming
Authors: Wu S.H. , Reis Ana , Andrade Pires F.M. , Santos Abel D. , Barata da Rocha A.
Published: February 2012

Single point incremental forming (SPIF) is an innovative flexible sheet metal forming process which can be used to produce complex shapes from various materials. Due to its flexibility, it attracts a more and more attention in the recent decades. Several studies show that besides the major operating parameters, namely feed rate, tool radius, and forming speed etc., tool path is also an important processing parameter to affect the final forming component. In view of that, the present paper studies the influence of tool paths on the work piece quality by the finite element method coupled with the Continuum Damage Mechanics (CDM) model. The formability of incremental forming in different tool paths is also analyzed.
Electronic Anti-Cut for Automatic High Speed Horizontal Flow Wrapper with ECAM
Authors: Shao Wei , Sun Li Juan
Published: February 2012

In this paper, a DSP-based servo motion controller is developed for the horizontal flow wrapper, where the multi-axis servo drives and electronic anti-cut are designed to improve automatization and safety for the packaging system. This paper relates generally to high speed packaging machinery with electronic cam and more particularly to the process of electronic anti-cut, where product-out-of-registration conditions can be sensed and automatically passed without damage to the seal heads and without manual intervention.
Study on Pulverized Combustion Boiler Co-Generation Belite Q-Phase Cement Clinker from Coal
Authors: Jiao You Zhou , Ding Pan , Du Shuang Li
Published: February 2012

Taking Changguang high-sulfur coal and Yanzhou low-sulfur coal as experimental coal types, carrying out the experiment of Q-phase cement clinker co-generated from coal on two-stage polyphase reaction setup and conducting XRD analysis on the mineral composition in co-generation clicker sample, the result shows that the major mineral species in compositions of co-generation clinker are 2CaO•SiO2 and Q-phase. Taking one 330MW machine set 1004 (t.h-1) pulverized coal combustion boiler as analysis object, this paper carries out the preliminary analysis of the economic benefits that it may bring to power plant and cement enterprise by using co-generation technology. The analysis indicates that the objective boiler adopting belite Q-phase cement clinker technology, on the whole estimate of the resourceful benefit of coal fly ash and SO2 emission reduction benefit, the economic benefit of power plant obtained is 25,870 thousand yuan per year. The economic benefit cement enterprise obtained by using Belite Q-phase cement clinker to advance capacity is 40,581 thousand yuan per year.
Performance Studying of Cotton Fibers before and after Cationic Modification
Authors: Zhang Ting Ting , Yu Yan Ping , Zhang Rui Yin , Shen Chun Long , Ren Li Yu
Published: February 2012

This article inherits a paper themed as Cationic modification process's depth exploration of cotton fibers. In this paper, we will primarily discuss cotton fibers’ strength, fineness and other aspects of performance compared between before and after modification, as well as their usability.
Dynamics Behaviors Analysis on the Column of Gear Grinding Machine
Authors: Wang Ya Hui , Ren Xiao Zhong
Published: February 2012

Aiming at the issue on the development of gear form grinding machine, a method for analyzing the dynamic behaviors of the machine column was introduced. Based on the model of gear grinding machine developed before, a suitable finite element model of the column was established firstly. Modal analysis on the column was carried out by means of ANSYS software, and the first five natural frequencies and vibration modes of the column were obtained. According to the analysis results, some improvements on the original column structure were made. By comparing the static and dynamic behaviors of several different rib structures presented, the best column structure is selected. This method offers theoretical basis for the structural improvement of gear grinding machine.
Study on Behavior of Carbonitride in Nb Micro-Alloyed Steel in CC-HR Region
Authors: Zhu Zheng Hai , Qiu Sheng Tao
Published: February 2012

As for the techno -interface of CC-HR region, the precipitation and dissolution of carbonitride in Nb micro-alloyed steel E36 were studied during continuous casting, roller conveying, stack cooling, heat-preserved and heating units in typical slab process flow by hot simulation experiment based on study of heat transfer. The results are as follows: Ti(C,N), and (Ti,Nb)(C,N) precipitate in turn in continuous casting and conveying. A few (Ti,Nb)(C,N) particles are not solid solute completely after heating. The precipitation of carbonitride is effected significantly by different cooling rate in conveying. When slab conveied at the rate of 6.00 °C/min and then cooled down to 600°C, the distribution density of carbonitride particles is higher, and the average equivalent diameter of carbonitride particles is smaller, some carbonitride particles distribute along the austenitic grain boundaries and the generation elements of carbonitride particles are under over-saturation state. When slab conveyed at the rate of 0.30 °C/min or 0.15 °C/min and then cooled down to 400°C, the distribution density of carbonitride particles is lower, and the average equivalent diameter of carbonitride particles is bigger, the carbonitride particles precipitate fully. The behavior of carbonitride in slab are effected by different thermal history in heating. The status of carbonitride is effected insignificantly by different thermal history after heating.
In Situ FT-IR Studies on the Urethane Reaction Kinetics of 1,3-Butanediol in Nitrogen-Contained Solvent
Authors: Yang Peng Fei
Published: February 2012

Phenyl isocyanate is used to react with 1,3-butanediol at different temperatures. Dimethylformamide is used as solvent. In-situ FT-IR is used to monitor the reaction to work out rate constant, Arrhenius equation and Eyring equation. The urethane reaction has been found to be a second order reaction, and the rate constant seems different between initial stage and final stage. The activation energy (Ea), activation enthalpy (ΔH) and activation entropy (ΔS) for the urethane reaction of primary hydroxyl group are calculated out, which are 90.9 kJ•mol-1, 88.2 kJ•mol-1and 20.2 J•mol-1•k-1, respectively. They are very useful to reveal the reaction mechanism.
CNC Transformation of X502 Milling Machine
Authors: Zhang Ming Kai , Ni Jun Fang
Published: February 2012

NC transformation of milling machine not only reduces the investment cost, but also improves the machining accuracy of machine components and productivity. This paper presents NC transformation of X502 milling machine, the main researches include the mechanical parts of the transformation plan, the calculation and selection of key mechanical components such as reduction gears, ball screws and stepper motors. According to requirements for the machine control system, electrical system is improved, the proper CNC system is also chosen. After transformation, X502 milling machine is promoted greatly and obtains excellent efficiencies and effectiveness in use.
Electrothermal-Chemical Gun Chamber Pressure Measurement System Based on Digital Optical Fiber Transmission
Authors: Zhang Yu , Zu Jing , Zhang Hong Yan
Published: February 2012

There were problems of strong electromagnetic interfere (EMI) and floating of ground potential when the electrothermal-chemical gun (ETCG) was launched. EMI seriously affected the chamber pressure measurement, and affected the accurateness of data and the security of apparatus. The chamber pressure testing technology was put forward which adopted the field testing technique with digital storage and the digital optical fiber transmission technique. The on-site storage pressure gauge and multilayer electromagnetic shielding structure was designed. Test data real-time transmission and remote reappear are realized by using high speed digital optical transceiver module and optical fiber. This testing technology effectively solved the EMI problem, improved the reliability and safety of chamber pressure measurement. The test data provide a basis for research of interior ballistic properties of ETCG. This testing technology can be widely applied to the parameters measurement with strong electromagnetic interfere.
Study of the Fault Diagnosis Method Based on Wavelet Time and Frequency Analysis
Authors: Qi Qun , Zhao Xue Zhang
Published: February 2012

In order to better solve asynchronous motor complex fault characteristics, improve the reliability of the diagnosis and accuracy, combined with wavelet transform technique, construct a wavelet neural network, wavelet transform technology feature extraction asynchronous motor as a signal wavelet neural network's input vector, and the wavelet neural network algorithm was used to optimize, realize the motor identify types of fault, through the simulation experiment data diagnosis results show that this method is effective and feasible. Based on the wavelet analysis and neural network fault diagnosis method of research.
The Preparation of Nitrogen-Doped Nano-TiO2 for Self-Cleaning Fabric
Authors: Meng Jia Guang , Li Huan , Zhi Chao
Published: February 2012

By sol-gel method, nitrogen-doped nano-TiO2 photocatalyst are prepared with a series of different calcining temperature and different doping amount, using tetrabutyl titanate as a titanium source and hydroxylamine hydrochloride as a nitrogen source. And more, the photocatalysts were characterized by X-ray diffraction(XRD), Transmission electron micrograph(TEM) to analyze the microstructure and performance. We ensured the optimal process to prepare nitrogen-doped nano-TiO2 for self-cleaning fabric. At last, we are carried out the test of self-cleaning effect.
Simple Algorithm of Wavelet Decomposition Depth and Program Realization
Authors: Zhu Lei , Bao Sheng Hua , Qiu Li Peng
Published: February 2012

This paper is contraposed how to determine the decomposition depth of the wavelet transform. Based on the principle of the wavelet coefficient keep the “energy” of signal, combined with Mallat algorithm, the article designs a simple algorithm. Though it, we could confirm the ideal decomposition depth of the wavelet analysis. Finally, through an example, we could verify the effectiveness of the algorithm.
Kinematics Analysis of Heavy Dump Truck Lifting Mechanism
Authors: Bai Hai Ying , Fu Chun Yan , Zhang Xiu Zhi
Published: February 2012

The kinematic characteristics and work principle of dump truck lifting mechanism are very complex. In this paper kinematics analysis with complex vector method is used. By this method the angle motion characteristics of components are obtained, the main parameters are calculated and the center of mass is determined when dumping granular materials. Through kinematic analysis, this paper provides a theoretical basis for reliability and stability of lifting mechanism and improves the design of heavy dump truck.
Simulation and Experimental Research of Disc Brake
Authors: Deng Jin Lian , Shan Ying Ying
Published: February 2012

Taking local-branded disc brakes for example, establishing the finite element model (FEM) of the assembly. Solving their stress and strain under work conditions, and the stress strain of its key components calipers and brackets is tested. The results showed that finite element analysis result of the caliper and bracket is consistent with experimental results, in line with engineering application, so finite element analysis process of brake assembly is feasible, finite element analysis for the brake industry to provide guidance.
A Yard Allocation Strategy for Export Containers Based Knowledge
Authors: He Jun Liang , Zhang Wei Min , Yan Wei , Lv Zhan Min
Published: February 2012

Firstly, this paper put forward knowledge acquisition and knowledge organization from the yard plans through KSP. Furthermore, the paper explores the approach of the construction of Production knowledge representation system. Finally, the effectiveness and reliability of the knowledge-based berth and quay crane assignment has been verified by the case studies conducted.
Development of an Economical Lapping Process
Authors: Konneh Mohamed , Tamsir Afzeri , Adesta Erry Yulian Triblas
Published: February 2012

The manufacturing of silicon wafers in particular involves numerous processes such as grinding, lapping, and polishing of large diameter wafers employing expensive equipment in order to produce the required optical quality and damage-free surfaces. In the finishing of thin silicon chips for making IC chips especially, it is difficult to lap and/polish the substrate and obtain low surface integrity, surface finish and at the same time generate flat planar surfaces. This paper presents the development of a low cost lapping process, the process tried out on thin silicon chips that generated fracture-free with mirror-like surfaces of low roughness values and reasonably high degree of flatness.
Embedded System for PCB Soldering Platform Controller Design
Authors: Chen Mao Lin , Chen Kai Jung
Published: February 2012

We make use of embedded BASIC Stamp 2 (BS2) microchip controller to design with Hopfield neural network (HNN) as the foundation of sample training, which applies for a soldering platform of mechanical vision and accomplishes PCB soldering positioning technology. The system is verified by Matlab and Simulink to set up the simulation of PCB image soldering positioning. The experiment is proved to improve the traditional low efficiency of PCB soldering technology, to achieve the feasibility of PCB image positioning and to promote the soldering quality.
Efficient Collision Detection Based on Hybrid Bounding Volumes
Authors: Zheng Yan Bin , Guo Ling Yun , Liu Jing Jing
Published: February 2012

The collision detection in virtual scene can effectively improve the fidelity of virtual reality, however, the existing collision detection algorithm are not fully ideal. In this paper, a collision detection optimization algorithm based on hybrid bounding volumes is presented to improve the real-time ability of bounding volumes collision detection. The algorithm combines the simplicity of AABB-AABB overlap test with the tightness of k-dops. Bounding volumes binary trees of the objects are designed as double-layered structure, which employ AABBs at the top layer, and k-dops at other layers. The intersection test uses different methods to detect the contact status among objects. Quest tree method is used to speed up the algorithm. Experiment results show that the algorithm above is efficient in improving the real-time and accuracy of collision detecting.
Research on the Group Collaborative Mode of CSCW
Authors: Wang Hong Bo
Published: February 2012

The aim of computer support cooperative work (CSCW) research is to improve the level of collaborative work among group components. Therefore we must understand the collaborative mode among the members of group to direct the collaborative work and research. The research on group collaborative work mode in CSCW is to summarize the collaborative mode of human group under information society environment and direct the collaborative work technology research. The research on the group collaborative model of CSCW should be intensified further to abstract the features of group collaboration and direct the research on collaborative work technology. In CSCW field, there are many group collaborative modes, such as conversation model, meeting model, process model, activity model and so on.
Study on the Casting Defects of Vermicular Cast Iron Brake Disc and the Countermeasures
Authors: Pan An Xia
Published: February 2012

Brake disc is the most important component in disc braking device. It transforms the kinetic energy of vehicles into frictional heat energy through the friction with brake lining and dissipates the heat into the surrounding environment. This paper focuses on the analysis of the shrinkage cavity and porosity as a major casting defect in vermicular cast iron brake disc and the explanation of its causes including the hazardous elements of pig iron, vermicular technique, and the quantity of curing agent to be added. Countermeasures to solve these problems are also proposed to effectively increase the qualification rate of flaw detection of brake disc.
Synthesis of Double Alkyl EO/PO Random Copolyethers with KOH Catalyst
Authors: Guo Jian Guo , He Su Qin , Jiang Jian Ming
Published: February 2012

Ethylene oxide (EO) and propylene oxide (PO) random copolymer was synthesized with 1,2-propanediol as initiator, then the end-capping process was carried out by adding various alkyl halides and potassium hydroxide (KOH) to produce the double alkyl EO/PO random copolyethers. The factors effecting alkyl-capping rate were discussed. The results showed that when the molar ratio of hydroxyl group/KOH/1-bromobutane was 1/1.9/1.9, reacting time 6.5 hr and reacting temperature 50°C, the alkyl-capping rate could reach over 80%. The end-capping rate would also increase with the increasing content of ethylene oxide in the random polyether, and the end-capping rate of the EO/PO/EO block-polyether was high than that of the random polyether with same molecular weight. Instead of 1-bromobutane, ethyl bromide promised a higher whereas chloralkane gave a lower end-capping rate respectively.
Study on the Microstructure and Mechanical Properties of 15CrMoR
Authors: Hu Xiao Dong , He Qing Kun , Lv Jian Tao , Zhang Yong
Published: February 2012

The butt weld sample with the material of 15CrMoR has been manufactured with the bonding methods of manual electric arc welding (SMAW) and submerged-arc welding (SAW). The relationship between the microstructure and the mechanical properties has been analyzed in this paper, and the conclusions have been obtained as followed: only the last weld layer has the obvious zones of weld zone, heat-affected zone (HAZ) and fusion area for the multi-layer butt weld, the weld zone and the fusion area will be heat-treated by the next layer welding; the hardness along central intersection shows a W-shaped distribution, and the zone with normalizing organization has the lowest hardness and the surface layer has the highest hardness; the mechanical properties of the multi-layer butt weld are much better than the monolayer weld’s.
Study on Method of Planning the Plane Maintainability Test Based on the Development Test
Authors: Xia Cong , Ma Lin
Published: February 2012

This document puts forward a method of planning the plane maintainability test based on the development test. In the practical engineering application, it is difficult to carry out the maintainability test due to the plane's development cost and schedule problems. In this paper, assuming not arranging special maintainability test in development phase, research and analysis the plane development tests which can produce maintenance information. Giving the information form, then, collect the maintenance information produced in development phase, so as to realize the planning the plane maintainability test based on the development test.
Novel Packaging Material for Mango Transportation
Authors: Wongsuriyasak Somchai , Srichandr Panya
Published: February 2012

The performances of paper pulp mould and foam net as packaging materials for mango transportation were studied and compared. Mangoes were packed in both types of packaging materials, vibration tested, and left for 24 days. Firmness, weight loss, and colour changes were measured. It is found that firmness of mangoes in both types of packaging during the first 3 days and slowly afterwards. The performances of both types of packaging are similar. Paper pulp mould performed better with regards to weight loss. Colour changes as measured by lab equipment are not conclusive but through naked eyes paper pulp mould seemed to perform better. It is concluded that paper pulp mould as a packaging material performs better than foam net in some respects, therefore an interesting alternative packaging material.
Research and Implementation of Project-Driven Teaching on C51 Programming
Authors: Xie Nan , Chen Wei Min , Seng De Wen
Published: February 2012

As a teaching model, "project-based teaching" method in the teaching of programming language courses has a very important & practical significance. Especially for higher vocational colleges students to develop practical skills is a top priority, "project-based teaching" can do this. In this paper, C51 programming and development based on micro-controller theory and application has illustrated the principles of project teaching means and strategies for project selection, and made a selection of teaching content to be highlighted based on real objects of material and social needs for the purpose of the base principles. In additional, projects being well selected for teaching methods can greatly raise their overall professional and practical abilities and also as possible as develop the potential and foster creativity.
The Pressure Transmission Properties and its Application of Composite Powder between the Silica Powder and Hexagonal Boron Nitride
Authors: Jin Cheng Zhu , Zhan Ge
Published: February 2012

When filling liquid’s temperature is over 300 degrees centigrade, the internal high pressure forming process is easy to be decomposed and metamorphosed, therefore, as the pressure transmission medium, the important limited factor for the further development of the temperature state internal high pressure forming process is the heat-resistant limit. This paper analyzes the physical properties of the composite powder between micro silica and hexagonal boron nitride, and on the basis of it, discusses its pressure-transmitting properties under the static pressure condition. The researcher uses the pressing machine to force the press on different quality of the mixed powder in the different temperature, and measures the wall pressure distribution by using the high temperature resistant pressure sensor. The experimental results demonstrate that when the hexagonal boron nitride comes to 2 percents of the composite powder, the effect of the pressure transmission performance are the best, meanwhile it is not a significant factor for the temperature to influence the pressure transmission properties of the composite powder, and it will keep stable on the high temperature. In the 500 degrees centigrade, as the pressure transmission medium, the warm state internal high pressure forming research has been done through adding axial force and internal pressure to the 40Cr steel pipe fittings. The research results prove that the pressure transmission medium can not only overcome the traditional medium in high pressure forming filling liquid under high temperature, but also fully improve the plasticity deformation of metal workpieces. It helps to the bulging of complex, high hard metal pieces, and it is also helpful for simplified forming technology.
Research on Green Supply Chain’s Coordination Based on Knowledge Spillover Effect
Authors: Ye Yong , Li Shao Wen , Miao Gui Gen
Published: February 2012

GSCM and its members of sharing resources generate knowledge spillover phenomenon within innovation activities.Considering the scarcity and publicity characteristics of knowledge,it puts forwards the driving factors including knowledge sharing cognition,technology gap, the economy and geography space, spill risk control and spill achievements’compensation.According to supply chain benefit coordination problem,it adds members’ participation and contribution factor for Shapley amendment model.Then it verifies rationality of the model by empirical analysis,which would be helpful for further knowledge spillovers benefit evaluation and compensation mechanism research.
Research on Algorithm of Springback in Sheet Metal Forming
Authors: Han Zhi Ren , Xu Jing , Meng Xiang Tao
Published: February 2012

The springback is one of the phenomena in sheet metal forming. It is very important for bending dies and sheet metal part to predict springback amount. In this study, according to different material models and different methods, the formulas of the radius of curvature in the neutral layer and springback angle after loading removing are given based on the principle of sheet metal bending. The results from the formulas of the radius of curvature in the neutral layer and springback angle, and experiments are compared. It is analyzed that the factors influence on springback and accuracy of the formulas. The results show that it is little difference for different formulas. The results from the formulas of the radius of curvature in the neutral layer and springback angle after loading removing close to the experiments.
The Application of Modern Industrial Engineering in Small and Medium-Sized Enterprise Management
Authors: Lu Yu Duo , Yu Jiao , Li Dan
Published: February 2012

At present, small and medium-sized enterprises have played an important role in China's economic development. Starting with the introduction of modern industrial engineering, this paper firstly pointed out the problems of small and medium enterprises in the development process, analyzed the need for the implementation of industrial engineering, and finally proposed the application patterns and development trends of industrial engineering in Small and medium-sized enterprise management.
Habit Formation, Equity Premium and the Evidence of Chinese Market
Authors: Gao Yuan Jing , Wang Yuan Chang
Published: February 2012

This paper expands CCAPM by introducing habit Formation. It is introduced in utility function, and combines with real consumption to produce surplus consumption ratio. Surplus consumption ratio is used to describe economic boom or depression. Simulated data is also offered in the process when we look surplus consumption ratio as state variable, and then simulated data is produced. The result proves that the model can describe historic trend of financial data. It is necessary to support Chinese finical development that all Chinese’s habit formation has steadily improved.
Design & Measure RUP Development Case Using the Zachman Framework as an Aid
Authors: Fu Li Na , Hao Ke Gang
Published: February 2012

Software process improvement (SPI) using the RUP is a persistent and iterative process which needs suitable methods for tailoring and measuring. The paper provides a method to tailor the RUP using the Zachman framework as an aid. In the method the RUP artifact matrix based on the Zachman framework represents tailoring result of artifacts vs. roles and the fulfilling rules of the artifact matrix represent the dependency relationship of artifacts of each cell. In addition the paper introduces two measurement models for measuring the performance of the development process to assist SPI in an iterative mode.
Voronoi Diagram Based Retrieval Method for the Internet of Things
Authors: Zhao Wen Bin , Zhao Zheng Xu
Published: February 2012

In the Internet of Things, search service is that information which is corresponding to entities in real world is retrieve so as to help people achieve information that they need. From the angle of visualization, this paper study the search service in the Internet of Things. With the Vector-Space Model, entities' information is expressed as entity vectors, and a Voronoi diagram based Vector-Space Model visualization method is presented. According to similarity between entity vectors, entity vectors' position in two-dimensional plane is calculated and this plane is divided into Voronoi diagram by nodes as which feature vectors of entity vectors’ clustering are taken. According to similarity between query vector and feature vector, a Voronoi diagram based Vector-Space Model retrieval method is put forward. This method restricts the searching scope in Voronoi domain of feature vectors that are the most similar to query vector, thereby the number of compared entity vectors is reduced in the retrieval process. The experiment result indicates that this method can ensure retrieval precision and improve retrieval efficiency.
Influence of the Deposition Temperature on the Properties of Medium-Frequency Magnetron Sputtering WS2 Soft Coated Tools
Authors: Lian Yun Song , Deng Jian Xin , Li Shi Peng
Published: February 2012

WS2 soft coated tools were deposited by medium-frequency magnetron sputtering, multi-arc ion plating and ion beam assisted deposition technique on the YT15 cemented carbide substrates. The influence of the deposition temperature on the coating properties has been studied. The coatings exhibited a dense and fine grained structure. WS2 coatings revealed a (002) preferred crystal orientation. WS2 soft coatings with deposition temperature of 200°C revealed a better crystallization of (002) preferred crystal orientation of Ⅱ texture than other three deposition temperatures. And the adhesive strength could get to 43.25N which was the largest. The thickness of WS2 coatings decreased firstly, then increased, and finally reduced with the increasement of deposition temperature. And the microhardness of the coatings increased firstly, then decreased, and finally increased with the increasement of deposition temperature.
Asymmetry-Induced Supramolecular Helices of Pyrene-Perylene Bisimide Triads
Authors: Xie Yun Zhi , Liu Chun Hua , Li Xun , Li Yi Bao , Fan Xiao Lin
Published: February 2012

The formation of helical nanostructure is investigated for donor/acceptor system. The helices of the supramolecular nanofibres can be revealed by atom force microscope (AFM) and circular dichroism (CD) measurement. The expermental results show the Py-Per-Py can self assembly into helical nanofibres. The controlled experiments on the compound Py-e-Per-e-Py with symmetrical conformation indicates the formation of helical nanofibres may be attributed to asymmetrical conformation.
Building Energy-Saving Technology
Authors: Liu Bing Nan , He Qiong
Published: February 2012

With the improvement of people's living standard, the building energy consumption is increasing day by day. In order to reduce energy consumption, we should develop energy-saving building and analyze building energy saving technology. This article mainly introduces three kinds of energy saving technology which include the external wall thermal insulation technology, doors and Windows energy saving technology and roof insulation technology.
An Investigation into Sidings Allocation Strategy for Automated Container Terminal Based on A* Search Algorithm
Authors: Yan Wei , Jiang Yuan , He Jun Liang
Published: February 2012

A rolling-horizon approach was proposed, which aims at the problem of sidings allocation for automated container yard stacking system designed and invented by ZPMC. The dynamic allocation model using objective programming was initially developed for sidings allocation. The model objective function was subject to the minimization of the total job waiting time. Furthermore A* search algorithm was employed for solving the model, which can return optimal solutions. Finally an actual case was firstly studied to illustrate the proposed approach for sidings allocation strategy, and then verified the validity and usefulness of this model and algorithm.
A Selective Reduced Integration 8-Node Hexahedral Element by Assumed Strain for Coining Simulation
Authors: Zhong Wen , Liu Yu Qi , Hu Yun Ming , Li Sheng Qiang , Xu Heng Jian
Published: February 2012

A selective reduced integration 8-node hexahedral element for coining simulation is developed in this paper. The element is free of volume locking by assumed strain method. The standard velocity gradient matrix is derived in which the shear items are ignored to avoid shear locking. Hourglass modes are successfully suppressed without user-input parameters. The element is successfully employed in the coining simulation package - COINFORM. Numerical tests and experiments of a typical coin are carried out to show the good performances of the element.
Finite Element Analysis and Optimum Design of Octagon Horizontal Type Vacuum Tank
Authors: Bian Bing Chuan , Zhang Ai Mei , Shang Zhen Long
Published: February 2012

Finite element model for octagon horizontal type vacuum tank was constructed based on the CAD/CAE software SolidWorks. The strength and stiffness of vacuum tank were analyzed. In order to optimize the size of vacuum tank stiffeners by the FEM and optimal design module, the optimization models were constructed, which have the minimized mass as the objective function subjected to the stress and displacement constraints. The results of optimal design were applied to actual production.
Characteristic Part Family and Similarity Retrieval Mechanism for Product Variant Design
Authors: Pan Min , Wang Sheng Fa
Published: February 2012

Characteristic part family definition, part family master model feature diagram and XML stored document of master model are given for product variant design. Then, variant design process of part family is elaborated, including searching similar parts and the similarity retrieval mechanism which are studied for the product variant design of part family. Finally, the standard part family and business part family are developed through Java, Pro/E, SQL Server and an example on product variant design is given to testify the validity of characteristic part family and similarity retrieval mechanism.
Tribological Properties and Wear Mechanism of Copper-Graphite Composite
Authors: Duan Li Li , Ran Xu
Published: February 2012

Copper-graphite composites were fabricated by spark plasma sintering (SPS) and cold-pressed (CP) processing using a mixture of copper and graphite powders mechanically alloyed. Pin-on-disc wear was used to evaluate the tribological behavior of copper-graphite composites. The results show that the coefficient friction and wear rate decreased considerably with increasing graphite content; with increasing the sintering temperature, the coefficient friction and wear rate just decreased in the same way. XPS analysis of worn surface indicated that better tribological properties are due to a lubricious film covering almost entire worn surface. The presence of this tribolayer improves the friction and wear characteristics when the tribolayer covers almost entire wear surface it effectively restricts metal to metal contact between pin and disc.
Design, Generation and Bending Stress Analysis of Face-Gear with Curvilinear Shaped Teeth
Authors: Wang Wen Jin , Zhang Jing , Zhao Jian , Zhang Ling Li , Wang Tai Yong
Published: February 2012

A curvilinear-tooth face-gear has been developed in order to obtain a high contact ratio, reduced bending stresses and lower sliding velocities compared to the spur and helical involute face-gear drives. The generation of the face gear is based on application of a tilted head-cutter whereas the conventional method of generation is based on application of a hob. The tooth surface model of the face-gear is established, and then bending stress analysis is performed by using Finite Element Method. The developed theory is illustrated with numerical examples.
Analysis on Processing Boundary of Stepped Shaft during Cross Wedge Rolling Process
Authors: Pan Ran , Zhang Kang Sheng , Jia Zhen
Published: February 2012

With the development of cross-wedge rolling (CWR) process in recent years, the processing boundary of parts by means of CWR has witnessed a great breakthrough, especially in the field of area reduction. Based on abundant experiment, the latest processing boundary is constructed. It is affected by rotation condition and products’ defects, such as necking, tensile failure and internal rarefaction. The relationship between basic process parameters and these defects have been presented in this paper, including reasons behind these phenomena.