bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Methods of Measuring Magnetic Field
Authors: Zhu Shi Kun
Published: November 2012

To improve the capability of magnetic and to develop new magnetic all needs according to the parameter of various magnetic; the important way to get the parameter of magnetic is measuring magnetic. The mean content of measuring magnetic is measuring magnetic-field. This essay sets forth some essential laws of physical and relative to effect, treats many methods of measuring the magnetic-field and some problems which must be pay attention. Be willing to perform some function of deeply research about magnetic-field.
Condensing Heat Recovery of Existing Large-Scale Refrigeration System
Authors: Zheng Da Yu , Guo Bing , Liu Wei Dang , Chen Xin
Published: November 2012

Existing refrigeration systems generally put the high temperature and pressure of refrigerant vapor into the atmosphere or cooling water through the condenser to reach the purpose of condensing refrigerant. But this will lead to the environment “thermal pollution”, and a waste of energy. This paper describes a plan of modification of the existing refrigeration system, through the waste heat recovery unit can be recovered the condensing heat effectively and product hot water in 50~ 60 to provide bathing. This system also can improve the refrigeration system operating conditions and the efficiency of generating units to achieve the purpose of energy saving.
An Improved Wavelet Threshold Denoising Method for Transformer Partial Discharge Signal
Authors: You F.C. , Zhang Y.
Published: November 2012

In order to overcome the discontinuance of the hard thresholding function and the defect of slashing singularity more seriously in the soft thresholding function, and improve the denoising effect and detect the transformer partial discharge signal more accurately, this paper puts forward an improved wavelet threshold denoising method through analyzing the interference noise of transformer partial discharge signals and studying various wavelet threshold denoising method, especially the wavelet threshold denoising method that overcomes the shortcomings of the hard and soft threshold. Simulation results show that the denoising effect of the method has been greatly improved than the traditional hard and soft threshold method. This method can be widely used in practical transformer partial discharge signal denoising.
Dynamics Analysis and Vibration Suppression of a Flexible Rotation Beam
Authors: Ren Fu Shen , Chen Su Li , Yao Zhi Gang
Published: November 2012

This paper studies the complex transverse vibration behavior of drill string. The drill string was simplified as flexible rotation beam, and drill string of complex load was simplified for flexible rotation beam system. The nonlinear dynamic equations of flexible rotation beam is established and the complex dynamic response of flexible rotation beam in resonance case is analyzed by using method of nonlinear dynamics method. Research result show that the chaotic responses are sensitive to the revolving speed, the nonlinear oscillation of drilling string can be controlled by changing the rotating speed. This study has guiding significance to keep sidewall stability in the process of horizontal wells of sidetrack, improve the drilling rate and reduce the cost of the drilling.
Juice Extractor Stent Plastic Mould Structure Design
Authors: Cao Xiu Zhong
Published: November 2012

The design of plastic parts structure analysis, confirmed the mould adopts the exactly two cavities, with two points type surface, three board type injection molds. Exhaust systems use the parting surface and lateral slide block clearance, plunger, cooperate with clearance to exhaust, and using a runner filling mold overall layout form. In the mold design process, the design of classification, gating system, exhaust system, cooling system, demoulding mechanism, are introduced in this paper.
Realization of the Viterbi Algorithm in MLSE with Intersymbol Interference
Authors: Lu Ying , Xu Quan Yuan , Liu Zhi Gang
Published: November 2012

Optimum receiver model for channels with Intersymbol Interference (ISI) and Additive White Gaussian Noise (AWGN) are introduced to deduce the Viterbi algorithm in the Maximum-Likelihood Sequence Estimation (MLSE). Finally, we use Matlab to simulate the algorithm in three different channels and analyze the experiment results. Analyses show that the Viterbi algorithm is applicable for any channel which is optimum from a probability of error viewpoint; the MLSE for channels with ISI has a computational complexity that grows exponentially with the length of channels time dispersion L; the loss of performance is negligible when the decoding delay achieves 5L.
Optimization of Control Parameters with Switching Operation Mode on Hybrid Brake System for Electric Vehicles
Authors: He Ren , Yu Jian Bo , Wang Run Cai
Published: November 2012

The safe area of braking force distribution was established theoretically by analyzing braking dynamics and the ECE R13 rules for hybrid braking system on electric vehicles. In the safe area, aiming for maximum of braking energy recovery, based on the precondition of ECE R13 and braking stability, an optimized method of motor regenerative braking force and friction braking force distribution was put forward for hybrid braking system, in which the distribution of friction braking force applied to the front and rear axle are fixed. Taking the coordinate of point with switching operation mode and rake ratio of braking force distribution as optimization target, new model of braking control strategy was set up in ADVISOR2002 and simulation was carried out, at last the optimization method was verified.
Lens Design with Silicon Wafer for Terahertz Wave Transmission
Authors: Wan Yong , Jia Ming Hui , Gong Hao Wen , Yang Yang , Cui Ying
Published: November 2012

Terahertz waves can pass through silicon wafer with less loss than traditional lenses. By selecting square, circular and sectors as building blocks, a serial of equivalent lenses for terahertz wave transmission were designed in the vertical plane of the silicon wafer, including hemispherical convex, concave mirror, triangular prism and spherocylinder lenses. The lens’ 2-D design in this work is much simpler than its actual 3-D shape. Besides high transmit ability, silicon wafer also has high refractive index. When a lens is oriented horizontally, it can act as a graded-index photonic crystal waveguide, due to the existence of a band gap, especially for cylinder and prism lens.
Controlling Factors of Hydrocarbon Accumulation and Optimization of Favorable Blocks for Both Flanks of Putaohua Reservoir in Southern Daqing Placanticline
Authors: Xiao Dian Shi , Chen Hong Li , Chen Hai Feng
Published: November 2012

Putaohua reservoir in south of Daqing Placanticline is rich in oil and gas resources. However, the distribution of oil and gas is so complex and the hydrocarbon accumulation process is still unclear by now. Due to low proven reserves, it is not effective to explore the reserves. By use of the logging interpretation and results of production test and together with analysis of the oil and gas distribution and hydrocarbon accumulation process of Putaohua reservoir in south of Daqing Placanticline, the controlling factors of hydrocarbon accumulation in aspects of oil and gas migration pathway, developmental characteristics of sand, local structure etc are discussed in order to optimize potential blocks. The hydrocarbon of Putaohua reservoir in both flanks in south of Daqing Placanticline is from the local K1qn1 source rock. Hydrocarbon migration mainly depends on vertical movement and is supported by short-distance lateral migration; hydrocarbon accumulation is mainly affected by restrictions of oil source fault and high fault block, so that most of hydrocarbon accumulate in the distributary channel and distal bar of reverse faulting footwall, horst, reverse fault and other high fault blocks where are closely adjacent to the oil source faults.
Precise Time Measurement Using CTMU
Authors: Zuo Xiao Qiong , Liu Ya Xian
Published: November 2012

Numerous applications require very precise time measurement. Usually, the measurement accuracy is increased by improve the MCU MIPS. It will take the high cost and current consumption, and the accuracy is limited in the MCU MIPS. Using CTMU channels work in conjunction with Analog to Digital converters, the high precise time measurement with low cost MCU can be achieved, and make the time measurement resolution to 1 nanosecond. CTMU module is available in many Microchip microcontrollers.
Leakage Failure and Principle of Underground Low Voltage Grid
Authors: Geng Jun Mei , Li Chun Guang
Published: November 2012

To describe the leakage protection of underground low voltage grid are based on zero-sequence voltage and zero sequence power direction of the current leakage protection and earth leakage protection based on the additional DC power supply two kinds. The paper gives the theoretical analysis of these two kinds of leakage, and unified the three-phase neutral point grounding system and by arc suppression coil grounding the under compensation leakage detection program, that provides a new approach for underground leakage detection.
SEM Image Processing of PP/Rice Husk Composite Using MATLAB
Authors: Zhang Huan , He Chun Xia , Lu De Rong , Yu Min
Published: November 2012

As a novel environmental protection, sustainable and energy-saving building material, Wood Plastic Composites (WPC) has been acknowledged gradually and has been used extensively in the trade of building materials in Chinese mainland. By acquiring SEM images of PP/rice husk composite and using digital image processing based on MATLAB, the composite microstructure images were subsequently processed, e.g. image gray adjust, filtering, smoothing, region segmentation, morphological processing, etc. The image processing results show that the processed images are clearer and more discriminative than those unprocessed, which hereafter facilitate to analyze the relationship between microstructure and macroscopic properties of WPC in depth for the future.
Calculation Method of Upgrade and Side Strengthening Old Bridge Based on Applied Mechanics
Authors: Zeng Xiang Chao , Wang Jing Yan
Published: November 2012

Bridge of Car 15 levels will be upgraded to Car 20 levels, in order to meet the current heavy traffic. This article introduces reinforcement scheme, and the scheme of mechanical analysis, the reinforcement design calculation, and the corresponding conclusion. Reinforcement measures for, by simply supported a bridge deck continuous (two across connect), increase the clapboard to enhance structure integrity, stick steel to the side of the beam etc. The test is satisfactory.
Experimental Study on Double Truss Cable Supporting System of Coal Roadways in the Isolated Coal Pillar and Fold Region
Authors: Yan Hong , Xu Teng Fei , Li Yang
Published: November 2012

The gangue in parts of underground coal mines in China is not to be hoisted to ground for direct accumulation but replace the coal resource in larger residual coal pillars. In order to solve the supporting problem of roadways in the isolated coal pillar and tectonic region, we firstly research the relationship between the supporting effect and fold or isolated coal pillar factor. Based on the analyzing results, the double truss cable support system (DTCSS) is proposed, and then the corresponding support structure and superiority are studied. Finally, a typical complex coal roadway affected by factors of synclinal axes, isolated coal pillar and intersection with another roadway was experimented using DTCSS, and the monitoring results of the roadway displacement showed that both of the largest roof subsidence and the convergence of both sides were no more than 170mm, which ensured the roadway safety and proved the efficiency of the DTCSS.
On 3-D Modeling CAD System of Production Platforms
Authors: Chu Xin Jie
Published: November 2012

The development of 3-D modeling CAD system on production platforms is mainly discussed in this paper. A suitable petroleum platform design by using software is developed according to the design status of domestic production platforms and the principle of structural life cycle method. The research results have been successfully applied to the 3-D graphic design of production platforms. The design level of offshore platform has been remarkably raised and the design quality has been improved. The technology research on developing method, design analysis method, parameterized modeling method, information management method, version management and etc, and can also be applied to other engineering designs and have certain popularization value.
High Performance Concrete in Highway Bridge in Cold and Arid Regions
Authors: Wang Zhi Yuan
Published: November 2012

High performance concrete originated in the generation of high strength concrete, and it is a new high technology of concrete, is in common with high quality and in concrete. High durability on the perspective of improvement and become, use a lot of high quality raw materials and modern technology, is the main development direction of concrete. Because its comprehensive performance by the superiority of the focus of the society, the strict construction technology in the extensive application in the highway bridge, high performance can the use of concrete can improve the efficiency of its safety and avoid unnecessary accidents
Control Methods of the Concentrated Moisture Exhaust System for Tobacco Primary Processing
Authors: Wu Yu Sheng
Published: November 2012

In tobacco primary processing line, there are often processing emissions with as peculiar smells, condensed water and tobacco powder dusts discharged from the production of processing equipments. In this paper, through a detailed design on the concentrated moisture exhaust system of tobacco primary processing and its control methods, the moisture-exhaust air volume's instability caused by the starting and stopping of all processing equipments in production line is solved, so as to ensure the stabilities of processing equipment's parameters and cigarette's smoke flavors and simultaneously improve the effect of processing the peculiar smells of emissions.
Effect of Microbiological Additive on the Diversity of Microbial Community and the Dynamic Distribution during High-Temperature Composting Process
Authors: Li Hong Tao , Xu Xiu Hong , Liu Jia
Published: November 2012

The objectives of this study were to analysis the differences of microbial community diversity between the microbial additives (MA) compost and natural compost and the distribution (spatial and temporal) of MA during high-temperature composting by PCR-DGGE technology. The results showed that the MA started temperature rapidly; prolonged the time of maintained high-temperature process and increased the diversity of microbial than natural compost. Sequence comparison revealed that the microorganisms most belonged to uncultivable, thermophilic bacteria. Bacillus became the dominant microorganisms after mixed with MA. MA were found in the top and middle portions of the compost throughout nearly the entire composting process,but absent in the natural compost. Our finding represents an important step towards the understanding of MA and its function in the degradation process of compost.
An Experimental Study on Edge-Breakage of Explosive Parts in Machining Using Micro-Photographic Observation Method
Authors: Tang Wei , Liu Wei , Xi Qing , Liu Tong , Zhang Ding Guo
Published: November 2012

Crack on the sharp edge remains a major concern and a key problem cries for solution in the course of explosive cutting currently. The adoption of the idea that enlarges the cutting zone and records the cutting behaviors again has founded the micro-photographic system for the cutting process. Tests have found that this system can be applied to research the nucleation and expansion of deep rock crack and the formation and dropping of the chips. The extension direction that controls the cracks is the key to resolve the cracks on the sharp edge. As for the initial stage of cutting, the cracks usually expand from the relatively weak surface of the work piece, while the final stage of the cutting, the cracks point to the weak end face through the inner part of the work piece. The latter is easier to have the cracks on the sharp edge comparing to the former. Working orthogonal rake of tool is an important factor that affects the extension direction of the cracks. At the final stage of the cutting, if the working orthogonal rake is -6°, the angel from the crack extension direction to the main cutting direction is -35°. When the working orthogonal rake is 9°, the angel turns to be -54°. This has shown that enlarging the working orthogonal rake to a certain extend can lower the degree of crack on the sharp edge. In addition, tests have found out that the relatively small working orthogonal rake is likely to bring out potential cracks. However, enlarging the rake angle excessively will lower the rigidity of the tool and thus add risks of shocking.
Power Transmission and Transformation Project Using Analytic Network Process
Authors: Huang Yue Hua
Published: November 2012

Transmission and transformation is an important part of National Electric Power building, Based on the reality of our country, this paper proposed a comprehensive evaluation model, refer to the entire life­cycle environmental friendly, sophisticated products, independent research, cost optimization of management, etc, in order to supply reference for the decision-makers of power transmission and transformation projects.
Numerical Simulation of Eddy Air-Curtain Dust Controlled Flow Field in Hard Rock Mechanized Driving Face
Authors: Cheng Wei Min , Nie Wen , Zhou Gang , Yang Jun Lei , Du Wen Zhou , Zhang Xin Hua
Published: November 2012

The author established the mathematical model of single-phase flow of gas based on the k-ε two-equation model and numerically simulated the eddy air-curtain dust controlled flow field in hard rock mechanized driving face with the help of FLUENT software.The result showed that, after all the pressure ventilation blown out by the radial clearance of mural cylinder, a full-face eddy air-curtain flow field is formed at the roadway section, forming the air-curtain dust controlled flow field that presses the tunneling place equally in front of the driver of roadheader. After the application of the development of new light polymer materials radial cylinder eddy air-curtain dust controlled system was adopted in hard rock mechanized driving face of north conveyor main roadway, reducing the local dust concentration effectively.
Multidimensional Grey Evaluation Method for Aeronautic Electronic Components & Devices Selection
Authors: Wang Xiang Fen , Gao Cheng , Fu Gui Cui
Published: November 2012

Aeronautic electronic components & devices selection is an important means to improve the aeronautic product reliability in its development stage. This paper proposes a multidimensional grey evaluation method to evaluate the electronic components & devices selection process by four indexes after the analysis of aeronautic production contractors and component manufactures. A memory selection example was presented to prove the feasibility of the proposed method. The proposed method can avoid the evaluation error effectively due to subjective factors and help to improve the product use reliability.
Research on Active Aided Knowledge System Push-Pull Technology Oriented the CAPP
Authors: Zhang Xi Ai , Li Ran
Published: November 2012

According to the quick updating of contemporary knowledge and the long learning process for the machinery technologists, this paper sets up an active aided knowledge system oriented the CAPP. On the basis of the knowledge base, the system provides relevant knowledge for the machinery technologists. The technologists can pull the information and this soft not only pushes information customized, but also determines knowledge demanded in order to send the lack of knowledge for the machinery technologists. The active aided knowledge system oriented the CAPP will reduce the machinery technologists’ burdens, improve the utilization of knowledge and focus technologists’ energy on the creative thinking.
Facility Layout Model of Production Line Based on Operation Comfort
Authors: Li Pu Hong , Fan Zhi Jun , Zhou Jun , Deng Jian Xin
Published: November 2012

Combined operation comfort and logistics optimization into the facility layout model of the production line, used Value Engineering theory, facility layout model of a production line based on operation comfort is put forward. After then, the model’s characteristics are analyzed. Compared with the traditional logistics-based model, this model optimizes simultaneously the workers' operation comfort and logistics, not only to reduce the cost of production line, but also to increase the operating quality, finally to enhance the production efficiency.
Improved Phosphate Ore Leaching with Physical Mutagenized Acidithiobacillus Ferrooxidans Based on Modified Logistic Model
Authors: Wang En Wen , Lei Shao Min , Gong Wen Qi
Published: November 2012

Strains of Acidithiobacillus ferrooxidans (At.f) were separated and purified from water sample collected from a hot spring and bioleaching a low grade phosphate ore. The results indicated that bioleaching phosphorus rate increasing sharply was starting at the ending of pH value decreasing, and ascend velocity had slowed down after linear regression of pH was at its second peak. In the environment of ultraviolet mutagenesis, the initial growth of At.f (r) was decreased by illumination time increased, but the maximum rate of bioleaching phosphate ore (ηm) was increased. In the condition of ultrasonic vibration, r was increased by vibration time added, and ηm was almost increased, except 20 min, owing to the modificatory coefficient was large enough. In circumstances of low temperature treatment, r was decreased by treatment time raised; ηm was more increase than the sample of un-treatment (CK).
Research on Optimization Control Strategy for Limiting Short-Circuit Current Based on Fuzzy Quantitative Control
Authors: Li Guang Lei , Sun Shu Min , Cheng Yan , Li Hong Bo , Yuan Shuai
Published: November 2012

To decrease short-circuit current, adjusting the power network operation by breaking transmission lines is the most economic and convenient measure. For large power grid, breaking transmission lines has thousands of combinations, so it's very difficult to find the best combination in a short time. Firstly, this paper formulated the sensitivity relationship between transmission line outage and impedance change. Then preliminary combinations schemes of transmission line outage were selected according to the sensitivity. Index values of factors were given using the fuzzy control evaluation. Finally, this paper determined optimal scheme from maximum priority and accomplished the accessorial intelligent optimize system of limiting short-circuit current. The rapidity and rapidity of the proposed control strategy was verified by calculating the actual power grid.
A Information Management Methods Design of Mechanical CAD Drawings
Authors: Liang Xiao Xiao , Wei Chong Gang
Published: November 2012

According to the CAD drawings management present situation of small and medium-sized design and manufacture enterprise, the paper proposed mechanical CAD electronically management drawings system based on B/S model. The system use the AutoCAD VBA for secondary development to extraction CAD drawings electronically title bar and list of attributes, then output to database SQL Server file form CAD drawings electronically data, and the implement use and management of a small and medium-sized machinery design manufacturing enterprise CAD drawings electronically management methods.
Optimized RBF for CBR-Recommendation System
Authors: Li Jian Yang , Liu Xiao Ping , Li Rui
Published: November 2012

Recommendation systems are widely used in E-commerce to help their customers find products to purchase, with which an important problem is to efficiently search the contents with their demands, and have been attracting attention from quite a few researchers and practitioners from different fields. This paper proposes the CBR-recommender (Case-Based Reasoning) which is a comprehensive expression of human sense, logics and creativity, and can automatically acquire the user’s preferences from the process of adaptation or revision to satisfy the personalized needs; and we deploy radial basis function network (RBF) to control the system scale caused by the large amounts of data with high dimensions, whose performance is also superior with respect to the total time for satisfying a query Our experiments indicate that our mechanism is efficient since it is bounded by the number of neighbors and scalable because no global knowledge is required to be maintained.
Stability Property of Uncertain Networked Control System with Random and Bounded Delay
Authors: Yao Jie
Published: November 2012

this paper is presenting an important question which is the stabilization of uncertain networked control system (NCS) with random but bounded delay. Normally, this kind of problem can be modeled as discrete time jump linear system controlled by finite-state Markov chains by using augmented state-space method. However, in this paper, a new model is proposed to combat problem of reliable control while actuators become age or partially disabled. Furthermore, the reliable controller is invented to make systems asymptotically mean square stable under several random disturbance by using improved V-K iteration algorithm.
Flowers Temperature and Humidity Control System Based on Applied Mechanics
Authors: Shao Wen Mian , Li Hai Tao , Jin Li Hong
Published: November 2012

Aim to the current shortcomings manual control system of greenhouse flowers and plants, designed of the temperature and humidity control system, introduced the system, working principle and structure in detail to the composition of the various parts of hardware and software components of the processes, PLC as the core of the system, chosen DS18B20 single-wire digital temperature sensor, IH3605 humidity sensors, digital to analog converter, digital display, auxiliary equipment, implemented the automatic control of the flower greenhouse temperature and humidity, had characteristic such as simple structure, high reliability, cost-effective, good temperature, to promote the value of a wide range and so on
Digital I/O Training Kit Development for Arduino Platforms
Authors: Huang Hong Hsin , Liu Chien Yuan , Huang Ming Chih , Ko I Chun , Lee Jia Ming
Published: November 2012

In this paper, a DIO training kit developed for fundamental embedded system learning was presented. The jobs of the research comprised the developments of a microcontroller board, four DIO functional modules with multiplexing circuit, and some control software. At present, the DIO training kit was implemented on an experimental breadboard. The integration and verification of hardware and software were conducted successfully. The results showed that the DIO training kit for Arduino platform are extremely suitable to support the Arduino based embedded systems training.
Application of Modular Design in the Intelligent Building Product Designing
Authors: Chen Liang , Jiao Rong , Liao Jin Quan
Published: November 2012

Modular design is a standardized approach to organically combine standardization and diversification and to effectively integrate multi-type and small volume-production with efficiency, which is a new technology that has been applied universally. Its basic methods contain the four aspects of identifying the destination domain of modular product, etc. In China, there are about hundreds of intelligent building intercom system manufacturers and products. However, how to make the product internal structure design standardized and modularized and realize the compatibility of different manufacturers’ products is a problem necessary to be resolved in this industry. This paper conducts modular design concerning about intelligent building intercom system products, and combines the green design thought with modular design method, which can simultaneously fulfill the product’s functional and environmental properties, exerting highly significant roles in the R & D, increasing the production efficiency, reducing cost and improving enterprise management. From a long term, system modular design is the development trend of intelligent buildings.
Basic Process of the Performance Test of the Turbine Generators
Authors: Li Nan
Published: November 2012

This report elaborates the performance test of the turbine generators, it gives the standard, the working condition, the methods of the performance test and the calculation methods, and in order to reduce the heat rate, increase the efficiency of the turbine, it offers some corresponding suggests. And then, software that is used for the performance test of the turbine generators is given; it is used for calculating and proofreading the main standards rapidly.
Board Microcomputer Control System to Export Diesel Locomotive
Authors: Zhang Xiu Ping
Published: November 2012

This Article based on the new board microcomputer control system structure and function, described in detail the new board microcomputer control system Exported Sudan SDD1 type diesel locomotive. After microcomputer control system is applied in locomotive, not only the performance of locomotive can be improved, and also the reliability of locomotive can be increased.
Research on Program Calling and File Sharing between Windows and Linux
Authors: Zhang Lan , Yuan Min , Liu Tao , Wang Li , Gao Peng
Published: November 2012

There is often more than one kind of operating systems in enterprises’ and organizations’ local area network. Therefore, exchanging visits under different operating systems would be very meaningful and important. Especially in the field of bioinformatics, in order to meet the requirements of researchers from various disciplines, such as mathematics, biology and computer science, we develop a new, intuitive and convenient system for exchanging resources between Windows and Linux.
Study of Control and Detection on Firing Circuit
Authors: Li Xiao Hu , Wang Yu Jie , Jia Hai Bo , Liu Jie
Published: November 2012

To improve the firing circuit security and reliability, methods of control and detection was put forward for firing circuit. The electronic information relevant knowledge is applied to blasting engineering technology, including signal transmission technology, signal emitting and receiving technology and computer technology, etc. Through judging the digital signal to send and receive and using computer technology, network connections and detonating situation can be showed indirectly. So methods can reach. Besides, that can attain other purposes have, such as monitoring network, checking the situation of explosive material initiating and judging blast hole whether to explode or not.
Fault Diagnosis of Power Transformers Based on Membrane Computing Optimizing Neural Network
Authors: Yuan Zhi Jian , Deng Hao , Liu Wen Jun
Published: November 2012

Presently, dissolved gas content analysis and fault diagnosis are the important segments of power transformer. As to the problem of the back propagation algorithm of neural network commonly used lies in the optimization procedure getting easily stacked into the minimal value locally and strict requirement on the initial value, a fault diagnostic method is presented, based on the membrane computing optimizing back propagation neural network. Throughout the process, compromise is satisfactorily reached among the network complexity, the convergence and the generalization ability. The results of diagnosis test show that the algorithm proposed has high classification accuracy, which proves its robustness and effectiveness.
Remote Measurement & Control of Ship Mooring System
Authors: Liu Yu Liang , Tao Li Fang , Lin En Ling
Published: November 2012

Based on thoughts of ship safety, one novel scheme of ship mooring remote measurement & control system is proposed, including information obtaining subsystem and remote control subsystem. The former is to detect mooring system’s environmental parameters such as wind speed, water speed, and anchor chain stress, then to submit such parameters to remote control center by wireless channel more than 2.4 GHz. The latter ‘s main body is the aforementioned remote control center and it’s based on an embedded WEB server with functions such as calculating probability of mooring movement, emitting alarming signal, etc. Except an ocean water speed detector invented by ourselves, the hardware design in this paper is based on IC (integrated chip).
Simulation of Large Amount of Data Liquid-Solid Coupling Based on the SPH
Authors: Fang Hao , Zhang Lei , Liu Yan , Sun Shi Bo
Published: November 2012

The visual simulation of large volumes of liquid-solid coupling According to the analysis of the form and movement, design an improved and simplified algorithm method based on the previous SPH aims to rapidly simulate out the interactive visual effect between the large volumes of solid and incompressible fluid.
Heat Storage Performance of Heating System of Phase Change Heat Storage
Authors: Sun Yong , Xu Feng , Shi Yong Jiang , Ji Xiao Yang , Liu Tian Liang
Published: November 2012

An experimental table of the heating system of phase change heat storage is built with thermal-storage tank packaging phase change material, which transferred heat with internal fluid. The flow rate, inlet temperature, outlet temperature of internal fluid and the temperature of heat storage material are measured. The influences on the properties of heat storage system are analyzed.
Simulation of Automatic and Intelligent Mechanical Arm
Authors: Wang Xin
Published: November 2012

This paper presents a robot image processing combined with the working principle of the technique on the intelligent mobile robot design. Mechanical arm can quickly determine the locations of target and Grip the target through image processing techniques, doesn't need to use the theory of complex image processing or additional sensors to measure depth. Programs can significantly reduce computation time, achieve real time operation. In this study, the company launched Autodesk Inventor software to simulate the mobile mechanical arm. In the simulation experiments, must consider the designed arm degree of freedom, and action fluency.
Analysis of Attribute Reduction of Rough Set and CNC Machine Fault Diagnosis Based on Particle Swarm
Authors: Wu Zhuang
Published: November 2012

After reasoning and calculation, fault diagnosis can automatically identify the causes of malfunction based on the fault symptoms, which is the core task of fault diagnosis. This paper applies the particle swarm algorithm and rough set to the fault diagnosis, and proposes fault diagnosis knowledge acquisition, rules optimization and fault identification based on rough set attribute reduction of particle swarm. Firstly, this paper introduces the rough set attribute reduction. Secondly, the particle swarm algorithm is applied to the rough set attribute reduction algorithm. Finally, the correctness and superiority of this algorithm are proved from the reduction experimental results of related data sets.
Simulation Method for ARM Fragment Killing Ground Targets
Authors: Wang Hong , Zhao Yin Jun
Published: November 2012

Aiming at the characteristic that the ground complex electronic equipments are apt to be killed by fragments, and for the purpose of solving the problem about the damage data shortage of the complex equipments BDAR study, on the basis of current study production, perfected is the fragments damage probility model of the ground target, and the geometrical model describing method, the explosion rule, the fragment simulation method and the target damage simulation method are put forward. By developing the damage simulation platform, the damage simulation method’s validity is affirmed
Ultrasonic Rangefinder Based on P89LPC932
Authors: Cheng Wei Dong , Zhang Li Song
Published: November 2012

In order to overcome the limitation, some traditional distance measurement methods in some special occasions go beyond measure flaw. This design centres on P89LPC932 and realizes non-contact air measurement by use of an ultrasonic sensor, which fully considers the close relationship of velocity and temperature, thus temperature compensation, further get measurement distance about 700cm, optimal precision at 1%. This design has some features, such as the strong anti-jamming capability, simple installation, small size, low power consumption, easy to embed in other system.
Analysis of the Multi-Tooth Meshing Effect of Three-Ring Gear Reducer
Authors: Li Yuan , Zhu Chen
Published: November 2012

Three-ring reducer is a type of epicyclic gear drive with small tooth number difference and internal gear. It is different from other gear transmission, that the load shearing factor of multi tooth contact is much smaller. On the basis of analyses of geometry, tooth deformation and manufacturing errors, a mathematical model which describes the state of multi tooth contact and the load distribution characteristics of tooth was developed. The multi- tooth meshing effect of the three- ring gear reducer is studied used the finite element method and ANSYS finite element software. While three- ring gear reducer is running, the number of teeth contacted simultaneously, their load distribution characteristics and the von Mises stress change are gained.
Analysis of Characteristics and Safety of Numerically Controlled Lathe
Authors: Zhou Ying Nan
Published: November 2012

Numerically controlled lathe has the features of high flexibility and high precision machining, efficient and conducive to the production management, and requires the operator to high technology, knowledge of programming concepts. During operation, the following security issues can use the following ways to reduce: numerically controlled lathe’s commonly programmed must be right, numerically controlled lathe’s processing procedures must be checked to get rid of its being breakdown, coordinate system and tool radius compensation’s install must be right, pay attention to teaching and management to reduce the rate of accidents’ happen, set up physical structure to separate machine and operator. By knowing the features of numerically controlled lathe can reduce accidents. Numerically controlled lathe has good processing quality, high product efficiency, simple operation advantages, but it may easily get into trouble when processing. So knowing numerically controlled lathe’s features and security problems can promote production’s rate and guarantee operator’s safety.
Three-Degree-of-Freedom Step Motor Control Strategy Based on DSP
Authors: Tang Yun Bo , Yang Jing Chang , Zhang Zi Yu , Gu Xiao Ke , Liu Qiu Li
Published: November 2012

Based on the basic principles of analysis of vector control, given three-degree-of-freedom step motor vector control of software and hardware design based on TMS320F2812 for the control, from the simulation results show that: start and 0.2s faster when the speed reaches a given value, the torque increases instantly, but then resumed, when the speed is close to a given torque value becomes 0; 0.8s torque generated when the transition, 0.03s, the torque is stable at 200N • M, show that the system has a good rapid response capability and steady state performance. Realize the decoupling flux and torque control, which makes asynchronous motor DC motor with the same access to instant-response performance, and improve the control performance and system performance.
Research on Video Processing System Based on Artificial Fish Swarm Algorithm
Authors: Fang Xian Mei , Gao Xiao Bo
Published: November 2012

This paper uses a new intelligent computational method-artificial fish swarm algorithm to have applications of the image in the video processing. Based on the understanding and analysis of artificial fish swarm algorithm, and it will be applied to video image processing to enhance the technical, its algorithm is designed at the same time. Initial conditions and termination conditions can be determined according to the specific video image problem in the design process. And then it can enhance the video image gray contrast in video image process by using the adaptive conversion, this can improve the effectiveness and quality of the image,. The experimental comparison results show that the artificial fish swarm algorithm can be used as a simple, fast and effective way in video processing system.
Modeling and Simulation of a Switchable Chaotic System with Fractional Order
Authors: Huang Su Hai
Published: November 2012

A new three-dimensional autonomous chaotic system is constructed. Some basic dynamical characteristics of this system with integer order are studied. The switchable chaotic system is constitutive of two subsystems. The dynamic characteristics of the fractional-order switchable system varying with the differential operator orders with fixed parameter are analyzed. Numerical simulations on the dynamics of new system with fractional-order have been carried out.
Experimental Study on Anti-Fatigue Damage Structural Design of Diesel Engine Bearings
Authors: Guo Zhen Jie
Published: November 2012

With higher requirements on energy-saving and environmental protection of diesel engine in the modern times, the loads on main bearing and connecting rod bearing of diesel engine are continuously increased, and also working conditions are even more critical. Bearings are the key moving parts of diesel engine, and play an important influence on reliability, service life and other performances of diesel engine. Therefore, the reasons for fatigue damages to its bearings greatly affect fatigue life. In traditional designs, effects of the problem are studied few. In this paper, therefore, this problem is studied for discussing the formation reasons and solutions for it theoretically.
Simulation Study on Planetary Bevel Gear CVT System Based on Virtual Prototyping Technology
Authors: Liang Jing Jing , Li Rui Qin , Ren Jia Jun
Published: November 2012

A virtual prototyping model for dynamical characteristic curves based on contact force was established, through the joint modeling(geometric modeling and constraint modeling) of planetary bevel gear CVT system in UG and ADAMS. The virtual prototyping experimental data proved that the system has the feasibility of over-zero variable speed. It is also verified that the model has advantage on continuously variable speed range ,compared with planetary cone ring continuously variable transmission system. The main effect factors of the continuously variable speed performance and output torque are obtained. This model could be used to further study on such issues.
Application of Orthogonal Experiments in Simulation and Optimization of Jaw Crusher on Traveling Characteristic Value of Moving Jaw
Authors: Zhang Li Zhen , Shen Xiao Qing , Cao Shou Qi , Lv Chao
Published: November 2012

In this paper, the traveling characteristic value of moving jaw of jaw crusher is studied by optimization experiment. The traveling characteristic value can reflect the relationship between capacity and energy consumption of jaw crusher. When it is around 2.5, the capacity of jaw crusher is high and the energy consumption is low. The virtual prototype model of jaw crusher was established and an orthogonal experiment was done to find the effect of four design variables on the traveling characteristic value. The results show that the angle of oscillation is the most important influencing factor and the least one is the length of toggle plate. The length of link bar and the eccentricity of eccentric shaft are less important factors. And the better design parameter values of PE1500*1800 was obtained.
The Synchronizer Performance Test of a Manual Transmission
Authors: Wang Zhi Hong , Yan Fu Wu , Tian Shao Peng
Published: November 2012

This paper takes a minivan’s manual transmission as the research object. The structure of the lock ring inertia synchronizer, the synchronizing principle and the test bench structure are introduced. After a series of tests, the test dates were analyzed and the results show that the test bench accord with the design requirements.
Development and Design on the Rubber Conversion Track Wheel
Authors: Hu Zhen Ning , Yao Kai
Published: November 2012

The article has analyzed the the rubber conversion track wheel development present situation and application, summarized the track wheel trend of development, through the improvement overall construction form, promotion bearing power, expands in the great tonnage wheeled vehicle application scope; Studies the track wheel the general structural style, enhances the track wheel technology form the versatility; The improvement designs the track wheel the absorption of shock organization and prevent overturn equipment, enhances the track wheel operation comfortableness and the security.Through analyzes the track wheel the basic composition and bed the frame support form, the drive form, the absorption of shock technology, guards against the turn over technology and rubber the track technology, summarized in the track wheel design principle.
Research on Knowledge Representation in Choosing Mechanical Transmission Type
Authors: Bo Rui Feng , Li Rui Qin , Shen Xing Quan
Published: November 2012

To tackle the knowledge representation problem in developing intelligent conceptual design system, a BP network based approach is proposed, in which the related knowledge regarded various mechanical transmissions can be acquired and represented with the trained weight and threshold of neural network if they are turned into numerical data, encoded with binary strings, employed as learning samples, and fed into the constructed BP neural network. In a sense, the trained neural network can be used as a knowledge base of expert system to facilitate the choosing process of mechanical transmission. This paper provides a promising approach to deal with the automation of knowledge representation in conceptual design of mechanical transmission.
Research on the Connection Performance of Variable Pitch of Screw Threaded Casing Based on 3D Finite Element Simulation Model
Authors: Guo Xiong , Zou Lv Long , Lu Bing , Zhang Shi Liang , Su Xing Ren , Xu Hui
Published: November 2012

The connection performance of the large taper, multi-thread, variable pitch of screw threaded casing is researched by 3D finite element simulation on ANSYS Workbench. The 3D finite element model is created precisely. The stress distribution on the teeth of three kind variable pitch of screw threaded structure is studied by using the static structure of the contact analysis module. Contrasting stress distribution of the variable pitch of screw with of the equal pitch of screw under the same working condition, it is validated that design principle for the variable pitch of screw connection is correct. The influence of changes in the amount of variable pitch of screw to the whole stress distribution on teeth is discussed. The results show that the force distribution on the teeth of the variable pitch of screw connection is more uniform than equal pitch of screw, and will improve the overall carrying capacity. This study has its practical value to improve the connective performance of the threaded casing and enhance the product quality of threaded casing.
The Design of Slope Mower
Authors: Yi Jiang Miao , Gao Dong Qiang , Lin Huan , Chang Zhi Guo
Published: November 2012

Past mowers only work on flat ground and are difficult to adapt to the slope lawn job. To improve this situation, some improvements in the transmission system are made by referring to properties and parameters of the similar mechanical. Then a mower is designed for operating on slope and structural simulation is made by Pro/E. The mower has the characteristic of self-propelled mower because it is driven by engine and rear wheel can get suitable driving force through triple reduction of belt drive, worm drive and gear drive. Also machine can operate on slopes with good lubrication. This will undoubtedly make significant and effective contribution to a further development of more advanced congeneric product.