bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of PLC in the Automatic Bundling Machine
Authors: Li Cheng Qun , Chen Long
Published: September 2012

This paper discusses the structure and workflow of Automatic bundling machine, introduces the applications of Siemens S7-300 PLC, which include the composition of the hardware control system, software design and the main functions and features.
Image De-Noising in Mixed Noises Based on Wavelet Transform
Authors: Chen Bin , Qin Quan , Zhang Xu Gan
Published: September 2012

A method of image de-noising in mixed noises based on wavelet transform is presented. Firstly, 2D multi-scale wavelets transforming the images to get the low-frequency sub-band images and the high-frequency sub-band images. Secondly, de-noising both the low-frequency sub-band images with the improved neighborhood average filters and the high-frequency sub-bands images with the improved wavelet threshold method. Lastly, wavelet refactoring the treated sub-band wavelet coefficients to get the de-noised images. The result shows that, this algorithm not only de-noises the image mixed noise, but also preserves the image edges and details well.
Research on Applications of Piezoelectric Thin Film in Sport
Authors: Fang Qun Ling , Fu Xian Cheng , Li Yan Hui
Published: September 2012

This paper presents application of piezoelectric thin film in sport to judge whether the ball is out of bounds, and how to install this application on the field. At last, a simulation will be done to text the performance of this application.
A Robust MEWMA Control Chart Based on FAST-MCD Algorithm
Authors: Li Zhe , Miao Rui , Wei Chuan Qi , Li Ze Feng , Jiang Zhi Bin
Published: September 2012

MEWMA control chart is generally used to monitor slight deviation of mean vector for multivariate process. Sample covariance matrix S is often applied to estimate population covariance . When the initial sample data contains outliers, the results may be impacted and then weak the probabilities of control chart signals since the conventional mean vector and covariance matrix are not robust statistics. In this paper, FAST-MCD algorithm is used to build a robust covariance matrix to improve the robustness of MEWMA control chart. From the analysis of samples, the robust MEMWA control chart based on FAST-MCD algorithm has better immunity to small amount of noise in the initial samples.
Design of Urea-SCR Model of a Feedforward Controller Based on Simulation in Diesel Engine
Authors: Wang Bao Yi , Wang Qian
Published: September 2012

Using a mathematical model, a feedforward controller model of Urea-SCR (selective catalytic reduction, SCR) in diesel engine is realized. At steady-state conditions, the simulated NOX concentration shows great consistence with the experimental value in the downstream of the converter. It can be seen that the simulation results show comparatively accurate performance of the model with the converter temperature changing linearly in the range from 450K to 750K.
The Application of EtherCAT Fieldbus in Pure-Software Open CNC System
Authors: Li Chun Mu , Zhang Ming Zhong , Li Yin , Chen Yong Ming
Published: September 2012

EtherCAT fieldbus is widely used in the NC field for its superior performance. Based on ADX CNC, a pure-software open CNC system designed by Amoy Dynamics (Xiamen) CO., LTD，this paper comprehensively compares VersioBus with EtherCAT which are two communication platforms supported by ADX CNC and explicitly introduces the application of EtherCAT fieldbus in pure-software open CNC system with a real example. The application results show that the system is stable, fast response and high precision.
The Peak Resolution of Diffuse X-Ray Diffraction Pattern of Tibetan Medicine
Authors: Duan Xin Wen , Liu Yuan , Hu Cheng Xi , Li Yong De
Published: September 2012

Modern signal processing method is employed to peak resolution for four kinds of classical Tibetan Medicine X-ray diffraction patterns.Characterizing crystal diffraction peaks with Guass-Cauchy composite function, and combining with seventh polynomial characterizing the non-crystalline peak, the nonlinear least square method are adopted for peak resolution of Tibetan medicine XRD pattern. The result shows good handling effects of peak resolution.
Real-Time Detection Method on Draft of Inland Departure Ships
Authors: Wu Jun , Ding Shen Qi , Yu Kui , Li Xiao Biao
Published: September 2012

For ensuring the safety of inland river shipping and avoiding super draft, it is of significance to propose a method to detect draft of inland departure ship. The real-time detection method on draft of inland departure ship is proposed, the measurement principle of ship draft is deeply analyzed, and the small scale experiment has been carried out. Experimental results show that as ship speed inicreases, the ship draft is of gradually declining tendency, and the measurement error is of gradually increasing tendency, the minium error is -4.2%, the maximum error is -11.4%. The results prove the possibility of this method , and also indicate that ship speed has large influence on measured ship draft.
Neural Network Inverse Decoupling Control of Flatness and Edge Drop for Tandem Cold Rolling Mill
Authors: Zhou Xiao Min , Wu Yun Feng , Mao Yang Jun
Published: September 2012

Realizing the decoupling control of them is one of the most important issues to achieve the flatness and edge drop high-precision control. In this paper, the flatness and edge drop control capabilities of all the control actuators are analyzed. The coupling relation of flatness and edge drop is analyzed. The neural network inverse decoupling control method is proposed to realize the decoupling control of flatness and edge drop. Simulation results represent that the flatness and edge drop control performance is improved effectively.
Research on Intrusion Detection for the Internet of Things Based on Clone Selection Principle
Authors: Liu Cai Ming , Zhang Yan , Chen Run , Xiao Lu Xin , Zhang Jian Dong
Published: September 2012

The fast development of the Internet of Things (IoT) makes its security problems appear gradually. It is urgent to study the intrusion detection technology for IoT security threats. An intrusion detection method based on the clone selection principle is proposed in this paper. The key elements in the clone selection theory are simulated. The clone selection algorithm is realized to be applied in IoT. Detection elements for security threats evolve to adapt the real IoT environment. The proposed method is expected to improve the detection efficiency of IoT security threats.
State Feedback Control for Fractional Differential Systems with Riemann-Liouville Derivative
Authors: Fang Yuan
Published: September 2012

This paper studies state feedback control for fractional differential systems with Riemann-Lιiouville derivative, which matrix A not satisfying the condition ιarg(λ(A))ι>α/2 . Based on the state feedback controllers’ designer, and Linear Matrix Inequality (LMI) apαproach, sufficient conditions for the systems with fraction order α (0<α<1) and α (1≤α<2) obtained respectively.
A Video Abstraction Model Using a Genetic Algorithm
Authors: Wei Zhi Cheng
Published: September 2012

In this paper, we present a standard genetic algorithm (SGA) based video abstraction framework, which can adaptively sample video frames in non-uniform way. We formulate the video abstraction as an optimization problem and apply a SGA in the feature space for video abstraction. The video abstraction is accomplished by applying genetic algorithm to search key frames from similar visual content source so that only a small but meaningful amount of information is retained. Experimental results and comparisons are presented to show good performance of our scheme on video static summarization and video skimming.
Chaos Synchronization between Fractional-Order Unified Chaotic System and Rossler Chaotic System
Authors: Wu Xian Yong , Cheng Yi Long , Liu Kai , Yu Xin Liang , Wu Xian Qian
Published: September 2012

The chaotic dynamics of the unified chaotic system and the Rossler system with different fractional-order are studied in this paper. The research shows that the chaotic attractors can be found in the two systems while the orders of the systems are less than three. Asymptotic synchronization of response and drive systems is realized by active control through designing proper controller when system parameters are known. Theoretical analysis and simulation results demonstrate the effective of this method.
Information Object Identification System Modeling and Visual Coding Rule Design
Authors: Bai Yu , Yang Dan , Cao Yan
Published: September 2012

Based on the description of an information object identification system and aggregate analysis of linear & faceted classification methods, an identification hierarchical construction method and a collection object enumeration method are put forward to model the information object identification system. Its system architecture is constructed and identifying nodes and managing nodes are used to define and associate information objects. According to coding theories, the information identification system is mapped into a visual coding rule system on the condition that the information object architecture, code collection and serialization, and coding constraints are retained. According to a dynamic coding rule tree, rule templates, and code generation methods, the corresponding visual interface is developed. Finally, the XML format is used to design a powerful, extensible and flexible data structure to realize the visual coding rule system.
Research for Improving the Process of Road Information Recognition on Grid Traffic Map
Authors: Li Yang , Zhang Xiao Dong , Bao Yuan Lu , Zhang Ke
Published: September 2012

Enhancement on extracting road layer directly and automatically from raster traffic map has become key segment in manufacturing vector maps. This research goal is to improve whole process of recognizing and extracting road layer from raster map, and to make the whole process as a closed feedback system with output measurable, state controllable and recognition sub-process optimally adaptable .The scheme is building an integrated system with its output road layer measurable by selecting two (or more) methods of perfect comparatively identifications with their mechanism complementary and then parallel collecting them as the controlled sub-process objects of the integrated system. Based on approach thought of microscopic identification and macroscopic elimination, the system realized first the road layer initial recognition and last road map level completely to withdraw via some output layers re-clustering and feedback control. In view of the standard municipal transportation map, the path and the region valve value condition has determined. Through re-clustering to the noise the whole map can be completely divided into two parts of road and non-road (region). The feedback re-clustering strategies of recognition for the transportation road networks are based on the core characteristic of obtain road constitution. The convergence of the feedback re-clustering of road layer guarantees the map level optimization.
Research of SPWM Algorithm Based on Equivalent Area Compensation
Authors: Wang Qi , Gao Tian
Published: September 2012

This paper presents a SPWM algorithm based on equivalent area compensation. The algorithm could make the output fundamental wave keeps linear with the modulation wave while the modulation M is more than 1 to extend the linear range and improve the accuracy of the output waveform by pre-shaping modulation function. Experiments show that this algorithm has such advantages as high voltage utilization , small harmonic loss，simple calculation and strong real-time.
Texture Image Recognition Algorithm Based on Steerable Pyramid Transform
Authors: Guo Li Min , Hu Jian Lin
Published: September 2012

at present, texture image recognition mostly is identified by using an intelligent algorithm which is based on the feature extraction method in a variety of ways, such as neural network recognization that is based on the wavelet transform or wavelet packet. Steerable pyramid transform is a multidirectional and multi-scale image representation. In this paper, texture recognition algorithm is based on steerable pyramid transform. This method extracts image features which are identified by support vector machine under different methods and resolution, and improves the accuracy of image recognition. Compared with the existing wavelet transform, wavelet packet, ridgelet in the case of noise, the methods' rate of correct identification is superior to other algorithms.
Studies on Properties of Ants System
Authors: Liu Wen Ling , Chen Yi Bao
Published: September 2012

Ants System is one bionic algorithm developed in recent years, lacking rigorous theoretical instructions. In this paper, studies on the properties of Ants System are made and several parameters concerned, include: ant initial number m、transfer control parameter q0、importance of visibility β and stigmergy decay parameter , are analyzed, which is of reference significance.
Γ-Radiation Effect Research of PP/TMPTA/TPU Blends
Authors: Guan Lan Fang , Chen Jin Zhou
Published: September 2012

This paper mainly researches the compatibilization effect of γ-radiation on PP/TMPTA/TPU blends. With trimethylolpropane triacrylate (TMPTA) as compatibilizer, different ratio PP/TMPTA/TPU blends are prepared via melt mixing by using a twin-screw extruder, and then the blends are irradiated(radiation dose≤25kGy) by 60Co-γ radiation source in different atmospheres. The effect of γ-radiation on the mechanical properties, dynamic mechanical properties and morphology of the blends is investigated. The results show that the compatibility of PP/TMPTA/TPU is improved by moderate dose γ-radiation (especially when radiation dose is 25kGy in air and 10kGy in vacuum), and γ-radiation functions similarly in the improvement of mechanical properties of the blends in the two atmospheres.
Grain Refinement of Zn-50Al Alloy through the Addition of Zn–Al-Ti-B-C Master Alloy and Melt Thermal-Rate Treatment
Authors: Wang Z.Q , Yang D.L , Yang Z.X , Geng H.R
Published: September 2012

In this paper, two types of Zn-Al-Ti-B-C master alloys were produced by a two-step method and were found to have good refinement effect for Zn-50Al alloy. SEM results show that TiC and TiB2 particles act as the nucleating center of α-Al grains in Zn-50Al alloy. The presence of TiAl3-xZnx phase in the matrix of Zn-Al-Ti-B-C master alloy was found to further enhance the refinement effect. The melt thermal-rate treatment process present good grain refinement effect for Zn-50Al alloy and it was further promoted by the addition of Zn-Al-Ti-B-C master alloy into Zn-Al matrix.
Research on the Lipophilic Degree of Surface Modified ZnO Nanocrystals with Different Morphologies
Authors: Zhang Lei , Ge Hong Liang , Zhong Min
Published: September 2012

ZnO nanorods and nanoparticles were successfully modified by NDZ-311w titanate coupling agent. The result of lipophilic degree showed that both ZnO nanocrystals with different morphologies were well lipophilic. Although both values of lipophilic degree firstly became larger and then smaller with the increase of modifier dosage, the different maximal lipophilic degree of ZnO nanorods and nanoparticles could be 68.8% and 77.9%, respectively. By comparing the two curves of lipophilic degree of surface modified ZnO nanocrystals with different morphologies, it could be demonstrated that the optimal dosage of NDZ-311w titanate coupling agent is inversely proportional to the grain size. TEM and XRD results showed that the grain size of ZnO nanoparticles were much smaller than that of ZnO nanorods, which can be the evidence for the equation. Otherwise, the surface modified ZnO nanoparticles displayed better dispersion than unmodified ones.
Assembly of Well-Aligned Electrospun Nanofibers via Contact-Transfer Printing
Authors: Liu Ling Zhi , Long Yun Ze , Sun Bin , Zhang Hong Di , Dong Pi Tao , Pang Na Na , Liu Yao Liang
Published: September 2012

Electrospinning is a simple and practical method for fabricating uniform fibers with diameters range from several micrometers down to a few nanometers. In order to achieve highly ordered arrays of nanofibers, a novel and feasible approach, named contact-transfer printing of electrospun fibers, is reported in this paper. Via this method, large-scale aligned nanofibers on various rigid or flexible substrates can be assembled. This technique is demonstrated to be efficient on transferring of electrospun nanofibers with a high degree of alignment (~88.2%) on a SiO2 substrate. In addition, it is found that the printing outcome highly depends on the pressure between collecting and receiving substrate.
The Preparation and Performance Characteristics of Polyvinyl Chloride-co-Vinyl Acetate (VC-Co-VAc-OH) Modified Membranes on the Non-Woven Fabrics
Authors: Zhang Jing , Wang Zhan , Ye Xiao , Li Wen Juan , Shi Long Yue , Yang Wen Tao
Published: September 2012

VC-co-VAc-OH material was used to prepare flat-sheet membranes on the non-woven fabrics via phase inversion method. And the membrane preparation conditions（polymer content, the content of additive, environmental temperature, relative humidity, evaporation time, coagulation temperature, coagulation time, immersing time of non-woven fabrics in solvent, and exposure time of non-woven fabrics in air）were discussed systemically by orthogonal method. Finally, the membrane prepared under the optimum condition showe higher pure water flux (287.9 ml•cm-2•h-1) and good retention of Bovine serum albumin (BSA) (87.4 %).
Synthesis, Structural and Gas Sensing Properties of Nano-Branched Coaxial Polyaniline Fibers by Electrospinning
Authors: Tang Cheng Chun , Huang Rong , Long Yun Ze , Sun Bin , Zhang Hong Di , Gu Chang Zhi , Wang Wen Xiu , Li Jun Jie
Published: September 2012

Polyaniline (PANI) is a promising functional polymer in the field of toxic gas detection. In this paper, nano-branched coaxial PANI fibers were grown on electrospun poly(methyl methacrylate) (PMMA) nanofibers by an in situ chemical oxidative polymerization method. The resultant PANI/PMMA fibers were characterized by scanning electronic microscopy and Raman spectrum analysis. The conductivity of an individual coaxial PANI/PMMA fiber is about 2.123 S/cm and that of the conducting PANI coating layer is about 21.8 S/cm. The ammonia sensing properties of the samples were tested by means of impedance analysis. The nano-branched PANI fibers can response significantly to low concentration of ammonia due to large specific surface area, and the sensitivity shows good linear relationship to the ammonia concentration of ppm level. These results indicate that nano-branched coaxial PANI fibers are promising candidate for detection of toxic ammonia gas.
Friction and Wear Behavior of 9SiCr Steel under Different Treatment with Plant Abrasive
Authors: Huang Xiao Peng , Wu Jing Feng , Wan Fang Xin , Zhang Ke Ping
Published: September 2012

In this study, the wear behavior of 9SiCr steel under different treatment with plant abrasive was evaluated by using an abrasive rubber wheel tester. The samples’ microstructures were analyzed by a metallurgical microscope, the samples’ worn surface morphology was observed by using SEM.The results show that: With the increasing of hardness of sample, Its wear resistance is greatly improved. Hardness of laser quenching sample is the highest, wear resistance of it is the best, the second is sub temperature sample. The wear rates and the wear coefficients are proportional to the sliding distance. The Laser quenching samplel display a consistent behaviour with a very low wear rate and a small increase of the wear damage is observed during the abrasive wear tests. The worn surfaces of the three kind samples are characterized by the micro-cutting wear, and no treatment sample is accompanied by fatigue wear mechanism.
The Computation of Elastic Constants of Double Wall Carbon Nanotubes Based on the Finite Element Method Considering Van Der Waals' Force
Authors: Chen Li Jie , Li Lin Bo , Zhao Qi
Published: September 2012

Based on the finite element method (FEM), we study the elastic constants of double-wall carbon nanotubes (DWCNTs). In the models, the Lennard-Jones potential function is used to consider the Van der Waals' force between non-bond atoms from different layers. The variations of the elastic constants with the diameter and the aspect ratio of the internal layer nanotube are investigated systematically. The computational results indicate that for both the armchair and the zigzag DWCNTs, the elastic moduli are generally lower than those of the single-wall carbon nanotubes with the same chirality as the internal and external layers. With the increase of the diameter and the aspect ratio of the internal layer carbon nanotubes, the elastic constant of DWCNTs will fall to a stable value.
Fabrication of Supramolecular Structured Hydrogels Based on Diels-Alder Click Reaction
Authors: Wei Hong Liang , Feng Ya Li , Chu Hui Juan , Yao Kai
Published: September 2012

A novel kind of supramolecular structrued hydrogels were fabricated by Diels-Alder click reaction between furan-functionalized polypseudorotaxanes and polymeric dienophiles. Firstly, polypseudorotaxanes were prepared by supramolecular self-assembly of furan-terminated poly(ethylene glycol)(PEG) and α-cyclodextrins (CDs) in water. And polymeric dienophiles were synthesized by a coupling reaction between copolymer of hydroxyethyl methacrylate and N,N-dimethyl acrylamide and N-maleoyl alanine (AMI). The supramolecular structured hydrogels were prepared by Diels-Alder reaction in water.
TEM Investigations on Three-Dimensional Silica Fiber Reinforced Silicon Nitride Composites
Authors: Qi Gong Jin
Published: September 2012

Three-dimensional silica fiber reinforced silicon nitride composites were prepared by polymer infiltration and pyrolysis method using perhydropolysilazane (PHPS) and polyhydridomethylsilazane (PHMS), respectively. The microstructures of the composites were characterized by transmission electron microscopy. Strong fiber/matrix interfacial adhesion was observed for the PHPS-derived composites prepared at 1073K, and the PHMS-derived composites prepared at 873K without fiber precoating. While for the PHMS-derived composites prepared at 873K with fiber precoating, the coating changed the fiber/matrix interfacial bonding conditions, leading to high mechanical properties.
Synthesis of CuO Microspheres by the Simple Hydrothermal Method and their Optical Absorption Properties
Authors: Fu Xiao Ming
Published: September 2012

CuO microspheres with a diameter range of 1~3 μm are successfully synthesized with 1 m mol CuCl2 as copper source and 3 m mol Na2CO3 as auxiliary salt at 180 °C for 24 h via the easy hydrothermal method. The phase, the morphologies and optical absorption properties of the samples have been characterized and analyzed by XRD (X-ray diffraction), SEM (Scanning electron microscope) and ultraviolet-visible absorption spectroscopy (UV-VIS), respectively. XRD analysis shows that the phase of as obtained samples is CuO. SEM analysis confirms that the increase of the the auxiliary salt is in favor of the synthesis of CuO microrods. And UV-VIS measurements show that CuO microspheres have a good optical absorption property.
Synthesis and Characterization of Novel Polymer of Vinyl Carbazole Bearing Thiophene Groups
Authors: Yang Yun Xian , Yang Ji Ping , Zhou Bing , Zhang Jing Yu
Published: September 2012

Combination of vinyl carbazole and thiophene groups’ excellent thermal properties and optical properties, a novel polymer named poly(2,7-bi-2-thienyl-9-vinyl-9-H-carbazole) was synthesized via radical polymerization and Suzuki reaction. The polymer was characterized using Fourier transform infrared spectrometer(FT-IR), gel permeation chromatography(GPC), differential scanning calorimetry(DSC), and X-Ray fluorescence spectrometer(XRF). It was found that this π-conjugated polymer containing vinyl carbazole and thiophene groups gave a high glass transition temperature (Tg=251°C). This feature made poly(2,7-bi-2-thienyl-9-vinyl-9-H-carbazole) possessing an excellent thermal performance.
Research on Measuring the Gear Surface of the Worm Pair
Authors: Li Peng Hui
Published: September 2012

The profile error of the gear surface of worm produces a great impact to gear characteristic. So, it is necessary to calculate the profile error of the gear surface. In order to develop the manufacturing accuracy of the complex tooth surface of the worm pair, a method to measure the error of the worm was designed in this paper. The profile error of the worm can be calculated based on geometrical operation. To meet the need of quality-controlling and the intelligent machining, the 3-D measuring technology method was adopted to measure the surface of the worm. And through the calculation, analysis and reconstruction, the real outline of the worm pair is redrew. A whole theoretical solid model of worm’s meshing surface with grid can be obtained based on the mathematical modeling. And it is possible to give the data of the recorrection and the feedback by analysing the profile error.
Study on the Organization and Mechanical Properties of Q345R Weld-Joint
Authors: Hu Xiao Dong , Zhang Yong , Lv Jian Tao , Zhang Sen
Published: September 2012

The butt weld of Q345R with the thickness of 40mm has been manufactured with the submerged-arc welding (SAW). The mechanical properties of the weld seam have been tested and the metallurgical structures have been analyzed. Conclusions have been obtained as follows: the metallurgical structure of multi-layer butt weld is much more complicated than the monolayer ones; only the last weld layer has the obvious zones of weld zone, heat-affected zone (HAZ) and fusion area; the weld zone and the fusion area will be heat treated with the next layers weld finished; the mechanical property of the multi-layer butt weld is much better than the monolayer weld determined by the corresponding organization.
System Design of Testing System for Truck-Mounted Solar Collector
Authors: Deng Yuan Chao , Zhong Yu Ning , He Tao
Published: September 2012

The truck-mounted solar collector testing system is a flexible and convenient testing device. However design of thus a system is much more difficult than that of the fixed solar collector testing system, because it needs consideration in every respect so as to make sure the following: accurate testing, accommodation of the reduced volume of the testing system, stability of the testing system, addition of a removable device and so on. This article explores the systematic design of the truck-mounted solar collector testing system, points out the design issues to be considered, propose an appropriate design plan, and finally conducts the main force calculation. Solar energy is one of the cleanest sources; it is green and pollution-free. Today, environmental pollution is getting worse and worse; thus application of solar energy is becoming more extensive. A solar collector is defined as any of various devices that absorb the solar radiation and deliver the heat energy to the medium of heat transfer device. Solar collectors are not a direct consumer-oriented product, but key components that form various solar thermal systems, such as solar water heaters, solar energy dryers, solar industrial heaters and so on, of which the solar collectors are a core part of the system. At present solar heat pipe collectors and collector plates are the two most widely used products of solar collectors. Factory productions of such products are subject to inspection before they can be put on the market. Currently product testing of this kind is performed collectively in fixed locations; consequently, it is vulnerable to the geographical conditions, climate changes, and other factors in the location. A truck-mounted solar collector testing system is a system that integrates both testing systems, heat pipe collectors and collector plates, in a vehicle, which can be driven into the manufacturers that produce heat pipes and/or heat plates or other places where testing conditions can be met according to the requirements. By doing so, the problems associated with the fixed testing system can be solved. However, design of truck-mounted type solar collector testing system is much more difficult than that of fixed solar collector testing system. In addition to testing accuracy, it must also take the reduced volume of the testing system into account to ensure that the system can be accommodated into a smaller space of the vehicle. Furthermore, the stability of the testing system must be assured. Finally a removable device needs to be added to the system for convenience. In the following, we show our design of the truck-mounted solar collector testing system and calculations for the related stress analysis.
Effects of Metering Configuration of Injection Molding Screws on Pressure-Developing Capability
Authors: Zhang Hong Qiao , Yan Bao Rui , Xin Chun Ling , He Ya Dong , Liu Ying
Published: September 2012

In this paper, IMP software was used to simulate different injection molding screws. And by the comparison between the experiment results and the simulation results, the software was verified accurate and reliable, then we can use the software to simulate the plasticizing process of some screws which are different in metering depth or metering pitch. By analyzing the pressure curve along the screws, the relationship between the metering depth and the pressure-developing capability, and the relationship between the metering pitch and the pressure-developing capability were obtained. The results showed that the smaller depth or pitch, the stronger pressure-developing capability.
Special Combustion Chamber in the Cylinder of Diesel Engine Working Process Simulation Analysis Based on the FIRE Software
Authors: Dai Jian Ying , Wu Xiao Wei , Shi Chun Yan
Published: September 2012

Exhaust noise is the main component of vehicle noise in the study of vehicle noise controlling. It is important to design a type of muffler that can match to engine and have the capability to reduce vehicle noise. At present vehicle mufflers are made by examination, therefore the time of product development is very long and it wastes material. Sometimes exhaust noise can not be reduced; in the contrary it will decrease the power of engine. The content of exhaust noise is tightly related to the temperature, pressure and velocity of combustion gas. In order to obtain the detail data of these parameters, FIRE software is used to perform the calculation of engine combustion process in this paper. FIRE is one of the advanced 3D simulation software packages and can simulate the complicated gas flowing and combustion in internal combustion engine cylinder. Its calculation result accesses to the fact and can attain gas temperature, gas pressure and gas velocity, provide reliable original data for the design of a muffler. In this paper, the basic combustion theory of internal combustion engine is introduced to the basis for the further application of numerical simulation, firstly. The geometrical model and mesh model of a type internal combustion engine are constructed by using FIRE software to analyze the working process of internal combustion engine. Based on the model and combustion theory, the relevant calculation model and initial parameters are chosen and applied into the software. A load case is designed according to the true running process of this engine. With these load cases, the combustion process is simulated in this paper. The detail distribution of the parameters such as combusted gas pressure, combusted gas temperature and velocity of the flow fields in cylinder is obtained and the relation of these parameters and crankshaft angle is given for the further research. It also provides data for muffler design by boundary element method. It is obvious that can shorten the product developing cycle and save the material.
Evaluation of Injection Molding Screw Performance by Melt Viscosity Homogeneity
Authors: Zhang Hong Qiao , Xin Chun Ling , Yan Bao Rui , He Ya Dong , Liu Ying
Published: September 2012

Though theoretical analysis and experimental verification, a direct method that measuring melt pressure fluctuation at the nozzle to reflect melt viscosity fluctuation in injection molding process was developed. Experiments for four injection molding screws and the analysis for the relationships between the melt viscosity homogeneity and screws configuration, melt temperature homogeneity, repeating weight precision and mechanical properties of the injection molding parts were conducted. At last, the four injection screws were evaluated based on melt viscosity homogeneity method.
Design and Modeling of a New Inchworm Linear Motor
Authors: Wang Qi , Yang Bin Tang , Liu Lan Tao , Meng Guang
Published: September 2012

This paper presents a research work for the design and modeling of a new inchworm linear motor. The three actuators of the motor are based on electromagnetic and permanent magnetic combined drive. The actuator may generate large output force, large displacement and quick response. A permanent magnet cam is designed to realize the continuous and smooth movement for the actuator. The motion equation of the cam mechanism is established and analyzed by SIMULINK from which the optimal contour of the cam may be confirmed. Then the general dynamic model of the linear motor is established with a 4DOF lumped parameter system.
The Study of Micro-Injection Molding of Thin-Wall Light Guide Plate with Hemispherical Micro Structures
Authors: Dong Peng Wei , Cai Heng Zhi , Zhang Ya Jun , Zhao Zhong Li , Wang Xin Liang
Published: September 2012

Micro injection molding is widely used due to it’s high accuracy, high production efficiency, low cost and the ability to fabricate products with complex structures. For thin-wall and large area parts, it is difficult to fill the cavity with micro structure. The light guide plate is a typical product. In this paper, the filling process of the light guide plate (LGP) with micro structures on the surface is studied. And the warpage of the LGP is analyzed, which affects the optical performance remarkably. Orthogonal method is used to analyze the filling process and the wrapage. The most important factor that affects the filling process and the wrapage is the injection pressure. The levels of the different process parameters on filling process are injection pressure, melt temperature, mold temperature, injection speed and packing pressure. For warpage, the sequence of the effect is injection pressure, mold temperature, packing pressure, melt temperature and injection speed.
FE Analysis on Rolls Deformation in Rolling Process of 4100 Heavy Plate Mill
Authors: Li Xue Tong , Wang Min Ting , Du Feng Shan , Cui Yong Gang
Published: September 2012

Against 4100 heavy plate miller, a 3-D rolling model involving rolls’ elastic deformation and workpiece’s elastic-plastic deformation is established using large deformation elastic-plastic finite element method. The distributions of the rolls’ bending deformation and the roll gap shape by simulation under the different processes. The results can provide the practical referential value for equipment design and processing setup of heavy plate mill. The FE model may be used to analyze skinning process on off-line.
The Assessment of Cylinder Liner by HAZOP Analysis and Fuzzy Comprehensive Evaluation
Authors: Pan Ru Liang , Zhou Xue Yi , Lin Xin Tong
Published: September 2012

Article uses the method of Combination of HAZOP analysis and fuzzy comprehensive evaluation to do a systematic assessment analysis for diesel engine parts: cylinder liners. Through the combination of their own characteristics and advantages, in the engine management system, some risk projects that will lead to abnormal wear to cylinder liner can be found. Then, for the major high-risk items, fuzzy comprehensive evaluation method should be used to get a more scientific and rational assessment by quantitative calculations.
GA-Based Optimal Design of Derricking Balance Mechanism of Bucket Wheel Stacker Reclaimer
Authors: Zhao Man Ping
Published: September 2012

The balancing system of a four-bar mechanism is frequently applied for bucket staking-reclaiming machines. For this purpose, a Multi-objective optimum model is developed in this study. Moreover, Genetic Algorithm is used for optimal design of the derricking mechanism and further programmed using MATLAB toolbox. To this end, this approach improves the mechanism performance, loading condition and cost-efficiency.
Automatic Parametric 3D Modeling for Involute Cylindrical Gear
Authors: He Qing Fang , Fu Kang , He Juan
Published: September 2012

Created a standard involute spur gears which was interactive and paramatric by Pro/ENGINEER software. Set gear parameters, created involute profile, achieved 3D paramatric gear model and make an interactive automatic modeling interface with the help of VC++. The finished 3D model is of high precision and easy to modify. If the designed product which is standardized and serialized, the methods and skills of the paper involved are suitable to make a automatic 3D solid paramatric model.
Design and Implementation of Cutting Parameter Selection System in Standardization Data and Modular Approach
Authors: Bai Yu , Yang Dan , Zhang Xiao Fen
Published: September 2012

The paper is to design a system that helps to select cutting parameters in standardization data and modular approach. The approach is based on industrial engineering methods defined by modular. The result is the parameters that take into account all the existing restrictive factors. First, a reasonable process to select cutting parameters is proposed. And then, the corresponding tools are designed. To achieve the standardization of the resources and process of cutting parameter selection, the resource contents and query actions are made in a uniform form. Finally, the selection of cutting parameters is realized within a management framework. It provides a scientific basis for selecting cutting parameters in actual production.
The Influences of Annealing Temperature on the Crystal Phase and Microstructure of the WO3 Thin Film
Authors: Qu Dan Ni , Cheng Hai Feng , Liu Dong Qing
Published: September 2012

The tungsten oxideWO3thin film was prepared by sol-gel process through peroxotungstic acid (PTA). The crystal phase and surface morphological features change at different annealing temperatures. The WO3 thin film is amorphous at 300 °C. When the annealing temperature is increased to 400 °C, it becomes monoclinic phase. The phase begins to become triclinic at 550 °C. The phase then changes to orthorhombic phase at 750 °C. With the increasing of the annealing temperature, the continuum of the WO3 thin film is broke and the gabs among grains become larger. The WO3 thin film is almost disappear after annealed at 850 °C.
The Dynamic Analysis on the Truss Girder of Portal Crane
Authors: Zhou Xin Xiang , Tang Yan Ling , Guo Shu Jun , Tian Rong Liang
Published: September 2012

Hoisting machinery is moving forward into high speed and heavy-duty, the requirement of mechanical properties is increasing. Therefore, dynamic research on the main girder crane is necessary. Taking a factory grab type door crane as the research object, the main girder is truss framed. The stress and strain distribution of truss girder in each working conditions to ascertain the dangerous position of the structure is determined with the dynamic analysis of the ANSYS software.
Isoscallop of Self-Adaptive Tool Orientation with Toroidal Cutter under Optimum Orientation of MCPs
Authors: Chen Ying , Wang Yi Qiang
Published: September 2012

End-milling of free-form surfaces on 5-sxis NC tools is a complex problem which has been studied by a large number of research scientists. When end-milling non-convex surfaces, there is a risk of interference between the tool and the surface. This paper presents a new approach to generate gouging-free tool path for constant scallop-height machining using 5-axis toroidal milling. Based on second-order approximations of the machined strip width, we present locally optimal cutting positions for cutting directions. The largest machined strip width of iso-scallop and the corresponding gouging-avoidance tool orientation are calculated. In the cutter path generation procedures, the master cutter paths have been chosen from the minimum curvature loci of the surface. The tool path generated by this method are also compared with that of the long edge of surface as the MCP, the results of simulation show that the method can yield a reduction in line segments of tool path . Velocity curve and acceleration curve are smoother.
Research on Air Suspension Rotation Parts’ Dynamic Equilibrium Measurements
Authors: Li Yan Hui , Gao Yong Quan , Fang Qun Ling , Fu Xian Cheng
Published: September 2012

The ideal of using air suspension is to reduce the movement friction of measurement system, since of the air suspension structure, the dynamic balance precision of rotating parts for measurement was improved. The use of air suspension measurement system to measure the deviation of the workpiece which rotating around a fixed axis is more efficient and convenient.
CFD Optimization of Design for IGBT Air-Cooled Heat Sink
Authors: Xu Bo , Lin Xin Chun , Peng Li
Published: September 2012

Power dissipation problems for Insulated Gate Bipolar Transistor (IGBT) are requiring increasingly complex design solutions. While designs that are more efficient make thermal management possible, current systems still require CFD methods for dissipating heat. Parameter optimization of the air-cooled heat sink is carried out to cool a three-chip, 2400w IGBT plate. The parameters are compared using maximum junction temperature and fan efficiency.
X6132 Universal Milling Machine Computer Numerical Control Transformation
Authors: Zhang Zhi Jun , Jia Hong Lei , Sun Ji Yu , Feng Meng
Published: September 2012

Based on research and analysis of current condition of CNC transformation, the essay proposes a scheme to reconstruct X6132 universal horizontal miller. Analyze the technical parameters of old X6132 universal horizontal miller according to the techniques request of machining objects, then project the general transformation blue print of old machine. Design and calculation of mechanical part in machine, according to the general transformation blue print, the longitudinal feed system and the transverse feed systems are reconstructed. Hardware circuit design of CNC system, utilize single chip 8031(MCS-51 series) to compose control system which can control feed movement of the longitudinal feed system and the transverse feed system with Micro-computer.
Study on Arc Stability Mechanism in High-Speed Tandem GMA Welding
Authors: Huang Peng Fei , Yao Ming , Bai Shao Jun , Lu Zhen Yang
Published: September 2012

Tandem GMA welding technology has high deposition rates and good welding quality. But the electromagnetic interference (EMI) between the tandem GMA welding arcs is the most important factor which can influence the welding quality .Via Orthogonal Experiments and variance analysis, this paper did some basic theory research of the mutual arc interference mechanism in the GMA welding. The study was carried out from three mainly aspects ,the welding arc length control mode ,the parameters of the control pulse and the optimal range parameters in high-speed welding .The high-speed camera system was used to observe the metal transfer .In this paper the researchers realized the stability work of high-speed movement of tandem GMAW welding .
Research on Fixing Night Vision System to Engineering Vehicles
Authors: Yue Hai Jun , Xin Hai Sheng , Dong Mei
Published: September 2012

Night vision system has been greatly used on saloon cars, and greatly improved the night vision of them. But it is still blank in night vision system usage in engineering vehicles. Engineering vehicle works often in the night, and exploring for fixing night vision system to engineering vehicles and broaden night vision is significant for active security. Through comparing various technical parameters to explore fixing appropriate night vision system to engineering vehicles is significant.
Modeling of Multiteeth Contact Meshing Gear Dynamics with Backlash and Coincidence Degree
Authors: Xu Zhen , Deng Hua , Wang Qi
Published: September 2012

In the present paper, a multiteeth meshing gear contact dynamics model is proposed by introducing a modified robotic contact model. The inertial property, backlash of gear teeth and coincidence degree of gear meshing are considered into the model. In addition, the proposed model is used to simulate discontinuous meshing gear contact. Simultaneously, the gear meshing contact dynamical finite element model is also simulated using the Ansys/LS-DYNA software to demonstrate the rationality of the proposed model.
Design and Simulation of New Energy-Saving Burner
Authors: Chen Xiao Man , Liu Gui Xiong , Leng Fei Yue
Published: September 2012

Aiming at improving burner combustion efficiency, reducing environmental pollution by burning, and to achieve the purpose of energy saving and emission reduction, a method of optimization design of burner is proposed. According to the method, new energy-saving burner system framework is analyzed, fuel combustion calculation, key institutions check and CFD simulation are combined in the technical route of burner structure design. Through the theoretical calculation and simulation results of the inlet institution, in meet conditions of heating process, pressure field of the inlet institution is relatively uniform, flow direction of velocity field in the ring canal is symmetrical, speed difference is small, pressure loss in actual burning allow range. The results show the method provided in this paper has reference value on burner structure optimization.
Analysis on Schemes of Passive Heave Compensation System for Base Plate
Authors: Yang Yan Gui , Chen Zhi Xin , Lu Min Xun , Xu Zhi Qiang
Published: September 2012

Three kinds of schemes of passive heave compensation systems (PHCS) for base plate are presented in this paper. These schemes are PHCS based on winch, PHCS based on weight and PHCS based on hydraulic cylinder. An analysis focused on the principles and the characteristics of these schemes is developed, and the hydraulic systems of these schemes are also established. This provides an important theoretical guidance for choosing the scheme of the passive heave compensation system for base plate according to different conditions.
An Efficient Parallel Algorithm for Mining Frequent Pattern
Authors: Cui Guan Xun , Wu Qian , He Bo , Ni Wei
Published: September 2012

Extraction of frequent patterns in transaction-oriented database is crucial to several data mining tasks such as association rule generation, time series analysis, classification, etc. An Efficient Parallel algorithm for Mining frequent pattern (EPM) was proposed and Fast Distributed association rules Mining (FDM) algorithm was improved. Hash table technology was used to improve the generation efficiency of the 2nd candidate items . It also reduces the number of transactions in transaction database using Tid table technology. A master-slave model of parallel algorithm for mining association rules is designed in the algorithm to reduce the communication cost. The experimental results show that this algorithm has a high efficiency to deal with large database.