bluuebunny/crossref_metadata_2025 huggingface dataset:
An Intelligent Lane Markers Recognition and Localization System Using Improved Hough Transform
Authors: Ghazali Kamarul Hawari Bin , Xiao Rui , Ma Jie
Published: October 2011

According to the U.S. National Highway Traffic Safety Administration, single vehicle road departures result in many serious accidents each year[1]. An intelligent lane markers recognition and localization system can assist vehicles stay in proper location of a lane that will reduce possibility of car accidents correspondingly. A great deal of lane recognition algorithms have been developed over the past several decades. However, reliable detection is still an issue because of variable road face conditions. An optimum algorithm, Probabilistic Hough Transform (PHT) is presented in this paper for intelligent Lane markers recognition which use a fixed camera installed on the vehicle to transmit video information. The result of experiment proved that under inconsistent illumination and a diversity of road conditions, the accuracy and efficiency of developed system have been improved greatly.
An Explore about Low-Price Pressure Sensor
Authors: Wu Ze Qiu
Published: October 2011

In low-end equipment developing it is often have the requirement of use low-cost pressure sensors, but the maketing pressure sensors’s price is very higher than the SCM. For decrease the price of the equipment to suit the market we explored a low-cost pressure sensor disgn. It is based on the bourden tube pressure gauge, SCM control system, Gray code disc and photoelectronic reading technology. The design can suit the certain low-cost equipment.
Adhesive Bond Discrepancies Identification with Hybrid Dynamic Parameter Method
Authors: Zhao Xin , Lai Xin Min , Zhang Yan Song , Chen Guan Long , Wang P.C
Published: October 2011

With the implementation of crash-toughened adhesives in automotive industry, adhesive bonding has become one effective joining technology instead of resistance spot welding especially for AHSS materials because of its better fatigue performance and greater flexibility. However, while chisel test has been widely used for resistance weld inspection, no practical inspection method is available for adhesive bond discrepancies identification. The inspection method we need for use in a high-volume, low-cost production environment should be fast, convenient, nondestructive, cost-effective, and able to effectively assure some minimum acceptable level of joint quality. The method we finally conducted was based on the weld-bonding process of different adhesive bonding joints by acquiring and analyzing the dynamic welding parameters’ signal curves such as the electrode displacement and dynamic resistance from different sensors installed onto the welding gun. Based on the integrated inspection system, lots of experiments and analysis showed that this inspection method is basically feasible, that is, it could identify different adhesive bond discrepancies qualitatively and accurately. Especially, the on-line inspection is conducted before the complete curing of joints in paint shop. If the inspection results are nonideal and some discrepancies are detected, the further repairing work is much easier and cost-effective. So the inspection method has a good potential especially applied in production line. The findings in this study provide the guidelines for using adhesive bonding AHSS materials in automotive industry.
Rational Production Proration of Gas Wells in Unconsolidated Sandstone Gas Reservoir
Authors: Wu Guo Yun , Li Jiao
Published: October 2011

Multi-layered unconsolidated sandstone gas reservoir is featured by unconsolidated lithology, interbeded gas-water zones and active edge water. Irrational production proration will lead to water breakthrough and sand inflow(AOF) is already incompetent in solving problems nowadays. Based on multipoint well test deliverability analysis, production data dynamic analysis, single well controlled reserves and critical situation of inflow calculation, and combining the calculation of minimum liquid hold-up gas rate an maximum erosion gas rate, meanwhile considering balanced gas recovery factor, balanced pressure drop, safe sand inflow and safe liquid hold-up, the multi-factor production plan has been set up, which is improved and adjusted by integrating water influx performance and years of stable production, through gas reservoir numerical simulation. A scientific and rational production proration pattern particularly for this type of gas reservoir has been determined. The reservoir simulation results of case study show that the water production in gas well can be controlled and the gas reservoir sustained stable production can last more than 1.3 year.
An Improved Ant Colony Algorithm for the Shortest Path in City’s Road Network
Authors: Bi Jun , Zhang Jie , Xu Wen Le
Published: October 2011

The shortest path between the start node and end node plays an important role in city’s road traffic network analysis system. The basic ant colony system algorithm which is a novel simulated evolutionary algorithm is studied to solve the shortest path problem. But the basic ant colony system algorithm is easy to run into the local optimum solution for shortest path. In order to solve the problem, the improved ant colony system algorithm is proposed. The improvement methods for selection strategy, local search, and information quantity modification of basic ant colony system are discussed in detail. The experiments are done in Beijing road network in China. The results of experiments show that comparing with the basic ant colony algorithm, the improved algorithm can easily converge at the global optimum for the shortest path.
Using an Intelligent Approach to Recognize a Wafer Bin Map Pattern
Authors: Liu Shu Fan , Chen Fei Long , Chung An Sheng
Published: October 2011

To decrease cost, semiconductor manufacturing companies always aim for yield enhancement. The analysis of Wafer Bin Maps (WBMs) is important for yield improvement. Real data sets are collected from a famous semiconductor manufacturing company to verify the presented method. Four types of WBMs patterns, center, edge, local, and ring types are selected for verification. Experimental results showed that with adequate parameter settings, the method can successfully recognize the pattern types and distinguish between random and systematic WBMs. There were 17 testing samples, and 16 of them were recognized correctly. The accuracy was 94.12%.
Research on Painting Robot Manipulator for Irregular Components in Reproducing Cartridge
Authors: Chen Qian Qian , Wei Xiu Ting , Lin Jiang Hai , Li Gang
Published: October 2011

In order to implement the surface painting automation of irregular components of reproducing cartridge, a painting robot manipulator with four degrees of freedom is carried out in this paper. Kinematics forward problem and inverse problem of the manipulator are firstly formulated and then painting trajectory is described by adopting the structure of endpoints and line-style. Furthermore, painting trajectory is generated in both joint space and Cartesian space according to robot’s trajectory planning principle.
Stability Analysis for Generalized Neutral-Type Neural Networks
Authors: Liu Guo Quan , Yang Simon X.
Published: October 2011

The issue of asymptotic stability is discussed for generalized neutral-type neural networks with time-varying delays. A new stability condition is presented based on the Lyapunov-Krasovskii method and the inequality technique, which is dependent on the amount of delay. The proposed result is given in the form of a linear matrix inequality (LMI). Finally, an example is given to illustrate our result. This result is of great significance in designs and applications of globally stable of generalized neutral-type neural networks.
Study and Improving on Adaptive Filter
Authors: Pan Hong Xia , Zhang Ying Ying
Published: October 2011

In this paper the principle of adaptive filter and various least mean square (LMS) adaptive filter algorithm is studied, based on the related hyperbolic tangent function LMS algorithm is presented, referred to as CTanh-LMS algorithm. Simulation results show that, compared with other adaptive filter algorithm, this method has better denoising ability, and the algorithm is simple, fast convergence rate, and can satisfy the gearbox vibration signal denoising requirements. The proposed algorithm can not only solve the gearbox fault feature extraction, and give adaptive filter algorithm research provides a new means, has important theoretical significance and practical value.
New Similar Material Simulation Test of Overburden Rock’s Separation
Authors: Huang Wan Peng , Lu Shi Zhong , Wang Liang , Huang Sha
Published: October 2011

The temperature and humidity in the laboratory are major factors that affect the accuracy of the similar material simulation test. This paper introduced a new similar material simulation laboratory that can keep its temperature and humidity steady. Take the new laboratory as base, doing a test to simulate the rule of overburden rock’s separation precisely. The first step of test is measuring the simulated material’s hardening curve and regressively analyzing hardening curve function. Then doing errors correction to make the simulating result precise and deducing error-correcting formula. At last, getting the rule of a certain working face’s overburden separation using the new method of similar material simulation test.
Design of Shield Hydraulic Support with Variable Parameters
Authors: Zhao Xi Jing , Lu Jun Min , Luo Rui
Published: October 2011

This paper builds the design platform for the shield hydraulic support with variable parameters.The platform characterizes the following aspects: support’s mechanical modeling, the whole and parts designing,strength checking. With the aid of VC++ software development environment, the mechanical model with variable parameters is set up and the support design is carried on,including design and check of the whole support and its components,such as top beam,shielding beam,the baseboard and so on. The development of this software could shorten the research and development periods of supports with similar structures and provide the research and development platform for the support design.
An Improved Adaptive Kalman Filter for Gravity Anomaly Distortion Correction
Authors: Zhao Li Ye , Li Hong Sheng
Published: October 2011

Combined with the system state equation and the measurement equation, a new method of cascade Kalman filter is proposed and applied to the correction of gravity anomaly distortion. In the signal processing procedure, according to the self-correlation sequences of the measurement gravity signal, the relation of the gain matrix K and the self-correlation sequences could be obtain, and the gravity signal at current time can be calculated by the gain matrix K. Emulations and experiments indicate that both the cascade Kalman filter method and the single inverse Kalman filter method are effective in alleviating the distortion of the gravity anomaly signal, but the performance of the cascade Kalman filter method is better than that of single inverse Kalman filter method.
Seismic Response Spectrum Analysis of the Single Vertical Centrifugal Pump
Authors: Li He , Fu Shi Bo , Zhao Qing Rong , Wen Bang Chun
Published: October 2011

A dynamic model of the single vertical centrifugal pump was established to avoid seismic disadvantageous direction towards the direction of continually occurring earthquake during the designing and the installing. Finite element method was used to analyse the single vertical centrifugal pump and educe the first 20 natural frequencies and vibration shapes. Response spectrum method was adopted to do earthquake analysis. Response spectrum was inputted from different directions for getting different displacements and loads. According to the results, model’s direction of 45°~75° should be located at the direction of continually occurring earthquake to avoid the maximum vibration.
Effect of Surface Energy on the Size-Dependent Yield Criterion of Nanoporous Materials under Complex Stress States
Authors: Zhu Liu Juan , Cai Wen Zhong , Tu Shan Tung
Published: October 2011

Within a micromechanical framework, the effect of surface energy is taken into account to explore the size-dependent yield criterion of nanoporous materials under complex stress states. A theoretical picture of the yield behavior on an octahedral plane is illustrated as functions of the surface properties and void size. The prominent size dependence of the yield criterion of nanoporous materials highlights the importance of the surface effect in analyzing the strength of nanostructured materials. The results demonstrate a fundamental framework to extend continuum strength theories to the nanoscale with substantial surface effect, which may be useful for evaluating the mechanical integrity of nanostructured materials.
Effects on the Clearance of Automotive Hub-Bearing Assemblies
Authors: Luo Yuan Xin , Wang Yong Qin , Yan Xing Chun , Liu Jun
Published: October 2011

Dynamics performance of the bearing and the reliability are largely depended on its clearance. The clearance of the bearing is determined by the assembly process, the initial setting clearance, the rotating speed, the thermo-expansion, etc. In this paper, the clearance of automotive hub bearing is modeled by analytical method. Then an illustrative example is given for demonstrating the effectiveness of the model. The fundamental study is the basic of dynamics performance of the bearing. Also, it can be used for analyzing the performance of bearing assemblies as well as optimization of the process.
Experimental Study on Gas Quenching Steel Slag by Fractal Theory
Authors: Xing Hong Wei , Jiang Li Mei , Li Gao Liang , Zhang Yu Zhu , Li Jie , Long Yue
Published: October 2011

By adopting heat-stew steel slag(HSSS) as a contrast, this research studied the gas quenching steel slag(GQSS) grindability using fractal theory and grinding power index. The results showed that the two kinds of steel slag had a good fractal characteristic, and the smaller fractal dimension was, the better grindability would be. Studied on the fractal dimension and grinding time of the two kinds of steel slag as well as their specific surface areas, a conclusion drawn that with the extending of grinding time, the fractal dimension of them would be continuously increased. However, within the same grinding time, GQSS not only have a relevant good distributed particle structural and a smaller fractal dimension, but also have a better linear relation between specific surface areas and fractal dimension. By determining the grinding power index, the correctness of using fractal theory to study GQSS can be proved. Meanwhile, the result also shows that GQSS has a better grindability.
An Application of Conformal Mapping to Fracture Analysis of Composite Plate with Curved Crack
Authors: Li Jun Lin , Cheng Hai Xia
Published: October 2011

Fracture problem about anisotropic composite plate of curved crack is researched with the help of appropriate conformal mapping. The crack curve is transformed into a unit circle by the quoted conformal mapping function. Based on the stress boundary conditions, the special stress function is found and the expressions for the stress field and the stress intensity factor near the parabolic crack tip are obtained.
Study on Preparation and Property of Drug Loading of AZM-PCL Nanoparticels
Authors: Ruan Li Li , Wang Da Xin , Zhang You Wei , Zhao Jiong Xin , Wang Min Wu , Zhang Xiu Fang , Chen Nan Liang
Published: October 2011

This study was to prepare polycaprolactone (PCL) nanoparticles. The biodegradable PCL was used as the carrier, and Azithromycin (AZM) was used as the model drug. AZM-PCL nanoparticles (AZM-PCL-NPS) were prepared by desolvation method. The effect of preparation condition: concentration of PCL, molecular weight of PCL, organic solvents, dosage ratio and so on, were specially noted and compared. A homogeneous size distribution and good dispersion were observed, the average diameter was around 70~400 nm, and the distribution index was 0.036~0.136. The drug loading reached 27.69 %, and the efficiency of encapsulation reached as high as 93.25%. The results were better than the other similar researches, this preparation way was successful.
Research on Extraction of Product Form Gene Based on Style Constraints
Authors: Wang Miao , Yu Sui Huai , Qi Bin , Han Wei Rong , Chu Jian Jie
Published: October 2011

Proceeding from the industrial design, this paper proposed the concept of product form gene with combining the product form and product style, and researched on the extraction of product form gene based on constraint style. It explained how to express product form gene based on style constraints, and construct the description model of product style semantic. This paper using analytic hierarchy process and semantic differential method to extract product gene, and take the real example to illustrate and validate, thereby providing a certain methodology direction for extraction of product form gene.
High Aluminium Cast Iron AL22D – Advanced Multifunctional Material
Authors: Ten Edis B. , Drokin Alexander S.
Published: October 2011

At the present work are considered the peculiarity of highly alloyed Aluminum cast iron Al22D crystallization, its casting, mechanical, exploitation and thermal properties, and also presented the examples of produce of castings from it.
Analysis and Design an Electro-Hydraulic Type Belt Capture Device for Belt Conveyor
Authors: Zhang Xu Hui , Ma Hong Wei , Zhang Da Wei , Mao Qing Hua , Chen Wei Lin
Published: October 2011

Aimed at the frequent accidents of conveyor belt and the the lower level of belt fracture protection in coal mine, this paper introduces a novel device equipment, the Eectro-hydraulic type Blt Cpture Dvice (Eh-BCD) to achieve safe and reliable working of steel cord conveyor belt. Firstly, after analysed the typical capture device existing on the market and researched the mechanical properties of the instant belt, an electro-hydraulic control type capture device solution was put forward, its work principle and main modules were introduced also. Secondly, main parts force of capture device calculated using Newtonian mechanics, designed and calculated the mechanical structure of the device, and determined key parameters such as installation space. Finally, after kinematic model built and analysed, device response time parameters the electro-hydraulic controlling capture was estimated.
An Ontology Learning Method Based on Document Clustering
Authors: Wei Xian Min
Published: October 2011

Ontology learning is a series method and technology of semi-automatic ontology construction, which uses various data sources to create or expand in-built ontology by semi-automatic method to build a new ontology. Existing ontology construction methods are to collect a large number of conceptual terms based on a large number of field text and background corpus, and then to select field concepts to construct a body. The proposed Cluster-Merge algorithm is to use k-means clustering algorithm in the field document at first, then according to document clustering results to construct body by themself, at last accoring to the ontology similarity for ontology merging to get final output ontology. The experiment may prove that Cluster-Merge algorithm can improve the body resulting recall and precision.
Comparison of in-Process Cutting State Detection in CNC Turning Using Different Neural Network Systems
Authors: Tangjitsitcharoen Somkiat , Senjuntichai Angsumalin
Published: October 2011

The aim of this research is to propose and compare the in-process detection systems of the cutting states of the continuous chip, the broken chip and the chatter for the carbon steel in CNC turning process by utilizing the sensor fusion, which are the force sensor, the sound sensor, the accelerometer sensor and the acoustic emission sensor. The new six parameters proposed for the inputs of the neural network systems, which are the enegy spectral densities of three dynamic cutting forces, sound signal, accelation signal, and the standard deviation of acoustic emission signal. All signals of parameters have been integrated via the different neural network systems by using the pattern recognition and the percertron technique to detect the cutting states, which are. Among the cutting states of chip formation and chatter, the broken chip is required for the reliable and stable cutting system. The experimentally obtained results showed that the in-process detection system using the neural network with the pattern recognition technique can be effectively used to detect the cutting states with the higher accuracy and reliability more than the one with the perceptron technique.
Dynamic Parameters Identification for Tong & Tong-Carrier of a Forging Manipulator
Authors: Cheng Ning Bo , Guan Li Wen , Wang Li Ping , Han Jian
Published: October 2011

This paper deals with the dynamic parameters of the combination of the tong, the tong-carrier and (or without) a forging (link TCF). Two linear form equations of the dynamic model of link TCF about the dynamic parameters are obtained. And then based on two linear form equations, the least square method is adopted to identify the parameters. Simulation results show that the identified dynamic parameters, mass m, moment of inertia IL and the mass center parameter b1, have a small relative error that no more than 5%.
Industrial Design and Analysis of Numerical Control Machine on Ergonomic
Authors: Wu Xiao Li , Chen Hui Juan , Yao Yue Yang
Published: October 2011

This paper analyzed the current China market of numerical control machine, discovering that there was seldom consideration about Ergonomic, and also lacked the necessary experiment with study. This paper mainly analyzed Ergonomic about numerical control machine, and for project design example of numerical control machine to analyze its importance of Ergonomic in numerical control machine design. This project is going to considering more about the coordination between human and machine, joining the humanized design into the numerical control machine, letting the person also feel the concern of the design in work.
Research and Development of Ground Source Heat Pump Unit Remote Real-Time Monitoring System
Authors: Meng Yan Mei , Pang Hai Feng , Hu Ying Ning , Zhou Quan , Li Dao Yang , Yu Xuan , Ou Bing Hua
Published: October 2011

This paper describes the research and implementation of ground source heat pump unit remote real-time monitoring system, researches in remote real-time monitoring system's overall design, hardware design, software design and implementation of OPC communication. The host computer takes advantage of the human-computer interaction interface of configuration software to achieve the remote real-time monitoring for ground source heat pump unit's running state; the lower computer uses data collector to intensively collect the data which is measured by field measuring instruments, and to achieve remote data transmission based on Ethernet, and then to carry out the communication between the host computer and the lower computer via OPC technology. The results show that the system achieves remote real-time monitoring of ground source heat pump unit, and is stable, easy to operate and provides a reliable basis for the actual energy saving effect's evaluation of ground source heat pump system.
Research on the Operational Availability for the Smallest Mission Unit and its Simulation Method
Authors: Liu Jun Jie , Yu Yong Li , Zhang Wei , Zhu Ai Min
Published: October 2011

In the process of the equipments used, operational availability (Ao) is the common top-level parameter for the operational readiness. However, current Ao’s theories and methods toward support objects can mainly be applied to low levels which are lower than basical equipment combat unit, single equipment, but is inapplicable with higher levels such as equipment combat unit and materiel system. Firstly, the paper introduce the concept and usage mission model of the smallest mission unit(SMU). Then research the concept and calculate method of the SMU's operational availability. And research the status update model and simulation flow of accumulation workload time of the SMU in the Joint Operation Equipment Support Simulation and Evaluation System(JOESSES). And simulation calculate of the SMU's Ao. Finally , in the JOESSES ,the method which be created in this paper be proved to be credible and availability.
Study and Experimental Analysis of Oval Bevel Gear Transmission
Authors: Lin Chao , Hou Yu Jie , Zeng Qing Long , Gong Hai , Nie Ling , Qiu Hua
Published: October 2011

Oval bevel gear is introduced as a new gear transmission type of intersecting axes, in which high-order, denaturing and eccentric one are included. Based on the theory of spatial engagement, spatial spherical coordinate system of the noncircular bevel gearing was developed and a generalized tooth profile equation of noncircular bevel gears was also proposed. The gear profile can be enveloped for the generating movement between conical cutter and oval bevel gear according to the envelope principle of conjugate profiles. Then a new and general parametric design method for oval bevel gear was founded. The classification and gear variability condition of oval bevel gear were discussed. Meanwhile, its pitch curve, addendum and dedendum curve were studied, and the corresponding equations were deduced. A roll check experiment is performed on the prototype workpiece. Then the influences of motor speed and load on transmission ratio were analyzed. Finally, the design method, profile generation method and manufacture method of oval bevel gear were certified as correct by comparing experimental curve of transmission ratio with theoretical one.
The Influence of Target Mesh on the Simulation Results of High Velocity Projectile Penetration
Authors: Chen Chuang , Li Wei Bing , Wang Xiao Ming , Li Wen Bin
Published: October 2011

In the simulation, the mesh quality has a significant impact on the simulation results. To study the influence of the size and shape of target mesh on the high velocity projectile penetration into concrete, using ANSYS/LS-DYNA software in this paper, different target mesh side lengths are selected to simulate, the variation curve that depth of penetration (DOP) with target mesh side length is obtained, select 1/6 times projectile radius as the target mesh side length can meet the accuracy requirements. Based the target mesh side length above, different radios of the mesh side length in the radial direction to the side length in the axial direction are selected to simulate, the influence law of calculating results that depend on the mesh shape is acquired. The contrast validation of experimental results is carried out, the simulation results are in agreement with the experimental results.
The Method of Recognizing Navigation Lights in the Runway Debris Visual Automatic Detection System
Authors: Yu Zhi Jing , Lang Feng Ze , Guo Xiao Jing
Published: October 2011

Runway debris visual automatic detection system is one of key measures that ensure efficient and safe airport operation. It can automatically recognize runway debris with visual detection methods, and determine the orientation of scanning system with attitude estimation method, then realize automatically detect debris. In this paper, the recognizing method of fixed feature navigation lights that are used to calculate system orientation are researched on. Runway area and background are detached by recognizing runway lines. Navigation lights are recognized and matched by the method of image matching. Experimental result show, runway can be separated and recognized from complex environment, and navigational lights can be matched quickly in the algorithm. The reliable fixed feature is supplied for followed determining scanning system orientation and located debris.
The Simulation Analysis and Modeling of the Coupling Vibration Absorber System for the Wheel Loader
Authors: Wang Zhun
Published: October 2011

In accordance with the Coupling vibration absorber system, introduced to reduce the vibration of the wheel loader at driving, designed are two dynamic models for the loaders either with the application of vibration absorber system or without that of it. The simulation analysis of the vibration reduction, with the help of the simulation software Matlab/ Simulink, shows that the vibration absorber system may reduce not only the vehicle vibration effectively but also that of the work device, thus providing the basis for the further research and development of the riding control system.
The Spectrum Segmentation Algorithm of Multimode Vibration Signal Based on Spectral Clustering
Authors: Wang Dan Dan , Zhou Yu , Ye Qing Wei , Wang Xiao Dong
Published: October 2011

The mode peaks in frequency domain of vibration signal are strongly interfered by strong noise, causing the inaccuracy mode parameters. According to this situation, this paper comes up with the thought of mode-peak segmentation based on the spectral clustering algorithm. First, according to the concept of wave packet, the amplitude-frequency of vibration signal is divided into wave packets. Taking each wave packet as a sample of clustering algorithm, the spectral clustering algorithm is used to classify these wave packets. The amplitude-frequency curve of a mode peak becomes a big wave packet in macroscopic. The experiment to simulation signals indicates that this spectral clustering algorithm could accord with the macroscopic observation of mode segmentation effectively, and has outstanding performance especially in strong noise.
The Study of Mapping Mechanism from Product Structure to R&D Project Tasks
Authors: Jia Peng , Gao Qi , Zhang Shan Hui , Liu Gang
Published: October 2011

Based on the analysis of data relationship between product structure and project plan of R&D projects, this paper proposes the mapping rules of product structure nodes and project task nodes, and establishes the mapping of the relationship between components and tasks. In this paper project plan is decomposed on the basis of product structure, so the workload of task decomposition of project manager is reduced, the efficiency is improved, and the accuracy and completeness of the task is ensured.
Analysis of Hydraulic Conditions in Urban Natural Gas Transmission and Distribution Network
Authors: You Yun , Li Lin , Gao Long Zhu
Published: October 2011

Based on the network node model and with the help of MATLAB program, we calculated normal and accident hydraulic conditions in urban natural gas transmission and distribution network. In particular, we analyzed and discussed the corresponding measures under accident conditions. It can provide the basis for remote controlling, pressure regulating and steady-state analysis in transmission and distribution network.
A Measuring Water Content Method Based on K-RBF Neural Network in the Coal on Transportation Belt
Authors: Pang Ming Xiang , Cheng Xue Zhen , Qian Xiao Chao , Cao Mao Yong
Published: October 2011

In coal mines fire consists of one of the main disasters, which usually take place for the reason that the water content of coal is over low. Over low water content of the coal transported with belt more likely brings about flying coal dust, which, when accumulated to some degree, will triggers explosion. Given that in China now coal is mainly transported with belt in coal mines, the author in this paper proposes a way to measure water content of coal transported with belt by use of microwave attenuation method and improve the measure accuracy through RBF neural network algorithm. This method is proved to be scientifically reasonable through laboratory simulation and experimentation. The theoretical basis and technical support are provided to increase the accuracy measuring water content of coal transported with belt by this method.
Experimental and Simulating Analyses of the Insulating Efficiency of Green Roofs
Authors: Zhao Yu Kuang , Lien Chi Chau , Wei Lei , Sung Wen Pei
Published: October 2011

The global climate change directly affects the weather pattern of Taiwan. Some research achievements show that buildings will decrease the indoor room temperatures by 1oC during summer and increase the indoor room temperature by 1oC during winter with 6%~10% savings of energy consumption. In this research, the phenolic resin board is used as an experimental roof insulation material in a green roof that is covered with living plants for the objective of reducing summer building air conditioning energy consumption and cost. The influence of roofing materials with various insulation capacities on the building interior temperature is simulated in this study using the basic thermal data measured in the laboratory. Analysis results of computational fluid dynamics, CFD simulation of the temperatures are close to the measured data. Simulation of the insulation capacity of the green roof indicates that the difference between outside and inside temperature is as high as 29°C that demonstrates the insulation capacity of the phenolic resin board. In addition to save energy, the combined insulation technology using phenolic resin board and planted green vegetation coverage on the roof will also contribute to a green and aesthetic environment.
Application of Systematical Engineering Theory in Study Style Construction
Authors: Sun Hua , Zhao Yan Jun
Published: October 2011

The basic principles of systematical thinking with an eye to its application take optimization as the primary objective. Based on the principle of integrity of the system as the most significant and essential feature, study style construction is considered to be system engineering. And in connection with the principle of relevance for the system, study style construction is characterized by and reflected in the whole process of education instead of a kind of temporary, periodic and partial work. All aspects of work are involved in colleges and universities, which are in need of active coordination, participation and support of all parts. Therefore, total study style construction should be advocated. According to the principle of hierarchy for the system, we also need to attach importance to the personality development of students while emphasizing comprehensive quality of all-round development.
Control and Behavior Prediction of Personnel Evacuation in Underground Ventilation Equipment Room on Fire
Authors: Guo Chun , Wang Ming Nian , Yu Li
Published: October 2011

There is no specification on the disaster prevention of and relief from a semi­airtight underground ventilation equipment room. Based on the study of construction fire prevention at home and abroad, this paper carries on the analysis of personnel evacuation from an underground ventilation equipment room. It firstly conducts researches on the basic maxims, framework and procedure of disaster prevention, then sets the evaluation standards of safe evacuation and presents the major influential factors as well. Finally, this paper sets an evacuation model in the hope to reach the goal of safe disperse without any injury, i.e. RSET(x)
Corrosion Damage Residual Strength Research of Shot Peening Aluminum Alloy
Authors: Lv Sheng Li , Cui You , Zhang Wei , Tong Xiao Yan
Published: October 2011

The pre-corrosion damage tests of LC4 aluminum alloy with the shot peening surface treatment and un-shot peening surface treatment are performed under different time levels. The residual strength has been studied by test after corrosion damage. An analysis procedure is developed using 3D reconstruction solid model and finite element analysis to predict residual strength, The relationship of static intensity and the corrosion damage are founded. An effective engineering technique for predicting residual strength of corroded structure is established on the base of this studying work.
Design and Dynamic Analysis of Horn for Ultrasonic Polishing
Authors: Zhao Ming , Li Yi , Kao Hai Tao
Published: October 2011

Ultrasonic polishing is an effective method to solve the bottleneck of polishing the mold cavity in mold processing, and the performance of ultrasonic horn is of utmost importance for the ultrasonic machining. In this paper the horn applicable to automatic ultrasonic polishing equipment is designed based on horn design theory, as well modal analysis and harmonic response analysis of four types of horn are carried out using Finite Element Analysis technique, which provides the basis and reference for further theoretical research and actual processing
Effect of Silica Fume on Durability of Wood Fiber Reinforced External Wall Board
Authors: Tan Dan Jun , Wang Ying , Wang Peng Qi , Zhao Jin Ping
Published: October 2011

In order to improve the durability of the wood fiber reinforced external wall board, silica fume, a kind of inorganic silica material was added in the board. The properties of the boards containing different amount of silica fume were studied. The durability was effectively characterized by determining the fracture work and bending strength after wetting-drying cycles test of the board. The results showed that the fracture work and bending strength of the board obviously increased when the proportion of silica fume and cement was 1:9~1:3.
Analysis of Traction Behavior of the High-Speed Lubricating Grease 7007 by the Correctional T-J Model
Authors: Yang Bo Yuan , Liu Gang Qiang , Su Bing
Published: October 2011

The traction behavior of high-speed lubricating grease 7007 was tested on a self-made test rig. The changes of traction coefficients with velocity, temperature and load were got from the experimental results. The rheological parameters were received on the basis of experimental data. The formula of traction force of high-speed lubricating grease 7007 was based on the correctional T-J model. The result shows that the traction coefficients of high-speed lubricating grease 7007 based on correctional T-J mode agree well with the experimental data.
Experimental Study on the Unconfined Compression Strength of Cemented Soil Contaminated by Municipal Sewage
Authors: Dong Xiao Qiang , Huang Xin En , Bai Xiao Hong , Lv Yong Kang
Published: October 2011

Contamination can change the physical properties of soil, reduce the strength of cemented soil foundation, and then induce the instability or disruption of buildings. This study explored the relationships among the age, electrical resistivity, unconfined compression strength, contamination of municipal sewage concentration. Firstly, we mixed the silty clay with municipal sewage of five different concentrations to form the contaminated soil. Then, mixed the contaminated soil with ordinary portland cement to form the cemented soil blocks. Finally, measured the unconfined compression strength and electrical resistivity of these blocks. The results show that the unconfined compression strength and electrical resistivity increase linearly with the increase of the logarithm of age, and decrease exponentially with the increase of municipal sewage concentration. The unconfined compression strength of cemented soil has a linear relationship with its resistivity. The municipal sewage concentration and age can be use to predict the unconfined compression strength of cemented soil.The predicted values correlate well with the experimental values.
Integration of Hybrid Energy System in Vehicle
Authors: Chang Jing Yi , Kuan Yean Der , Wang Jia You , Liou Sheng Shian , Liu Chung Tang , Chan Sheng Ching
Published: October 2011

The main purpose of this paper is to integrate and apply hydrogen-oxygen fuel cells as the major power system, which is combined with the auxiliary power system of a lead-acid battery in the hybrid fuel cell vehicles, and design and modify vehicle structure and a transmission system in order to improve stability and controllability. Furthermore, this study designs an appropriate power control system to increase vehicle travel time, reduce power consumption, and finally, integrate the hydrogen storage system into the power source of hybrid fuel cell vehicles for the development of energy-saving carbon-free transport vehicles. In general road surface driving tests, a low-pressure metallic hydrogen storage tank under the pressure of 0.5bar is used to provide 10g of hydrogen gas fuel to a 200W hydrogen-oxygen fuel cell stack as the major power source, and the auxiliary power source of two serially connected 12V 1.5Ah lead-acid batteries is used. The total weight of the hybrid hydrogen-oxygen fuel cell power system is 1.3 kg. In the general road surface test of a hybrid hydrogen-oxygen fuel cell vehicle, the average driving speed is 11km/hr, the motor consumption power is 45W, and the travel time is 90 minutes. The hydrogen-oxygen fuel cell vehicle is equipped with a three-stage gear box, and is able to automatically shift to the desired gear. The maximum driving speed can be up to 20km/hr, with motor power consumption of 90W.
Oxidation Kinetics of Self-Lubricating Ti-48%Al-2%Nb-2%Cr-x%CaF2 Composites
Authors: Yang Li Ying , Wang Shou Ren , Wang Ying Zi , Ma Ru , Wang Yong
Published: October 2011

The Oxidation kinetics of Ti-48Al-2Nb-2Cr composites (TANC) with addition of different weight contents of CaF2 solid lubricant was evaluated. It is indicated that oxidation dynamic curve follow quasi-parabolic rate law under 800 °C. Once the temperature exceed 1100 °C, the oxidation dynamic curve seems to do not follow quasi-parabolic rate law. The contents of solid lubricant in TANC matrix occur an important influence for oxidation resistance
Surface Image Local Contrast Enhancement Based on Texture Discrimination via Grey Relational Analysis
Authors: Li Gang , Xiao Xin Ping , Tong Ya La
Published: October 2011

Based on the analysis of main texture information in the neighborhood of image, we use the grey relational coefficient to decide the most obvious texture direction, which is conductive to selectively increase the local contrast of surface image. Simulation results show that the algorithm can obtain better experimental results, and it is a good method worth continuing to study later.
The Photoelectric Conversion Efficiency Research at Color Solar Cell
Authors: Jheng Wern Dare , Chen Shao Hsien , Lin Zhi Hong
Published: October 2011

When the petrochemical raw materials continue to rise, resulting in the demand for solar power to increase 25-30% annually. So solar power is currently the most practical and efficient best alternative energy sources. silicon solar cells is now the main raw material, which can be divided into: single-crystal silicon, polycrystalline silicon and amorphous silicon. The most efficiency is single crystal silicon solar cells, polycrystalline silicon solar cells yield larger and more expensive, amorphous silicon solar cell has the lowest price but the worst efficiency. Solar module packaging can produce the required voltage and current, and blocking the water to increase product life. Because the color of solar cells are usually black, is not easy to integrate into the environment. If we can use color packaging material to make solar modules, will be applied to toys, gifts, landscape, lighting and other everyday products, resulting in a more perfect match. This article will explore a range of color package parameters and the relative conversion efficiency of solar cell modules.
A Study on Processing Map and Flow Stress Model of AZ80 Magnesium Alloy Forming at Elevated Temperature
Authors: Xue Yong , Zhang Zhi Min , Wu Yao Jin
Published: October 2011

Quantities AZ80 magnesium alloy billets were compressed with 60% height reduction on hot process simulator at 200,250,300,350,400,450°C under strain rates of 0.001, 0.01, 0.1,1 and 10s-1.The processing maps based on the Dynamic Material Modeling (DMM) were constructed, which is useful to analyze the deformation mechanism and the destabilization mechanism of AZ80 alloy. If the mechanical property of AZ80 alloy is taken into consideration, the optimal deformation processing parameters from the processing maps are the deformation temperatures ranging from 300 to 350°C and strain rates ranging from 0.001 to 0.01s-1. Meanwhile, a flow stress model with eight parameters is used to characterize the dynamic recrystallization strain softening of AZ80 alloy.
The Research of Heart Sound Signal Energy Detection System
Authors: Wei Zhe , Li Xiang Wei
Published: October 2011

Aimed to enhance the efficiency of heart sound signal energy detection, a kind of heart sound signal energy detection system based on LabVIEW 8.5 is developed in this paper. The system makes use of saddlebag of signal processing and analysis tool of LabVIEW to detect and analyze energy of the heart sound signal. The system can detect, display, record and analyze the energy of heart sound signal. From the results of experiments, the detection and analysis of heart sound signal energy have importance clinical value to the earlier period diagnosis of coronary artery disease (CAD).
The Study of Stress Corrosion Crack in Heterogenic Welding Joints under Wet H2S
Authors: Xu Shu
Published: October 2011

Stress corrosion cracking behavior of the six heterogenic welding joints was investigated under the 1300ppm; 2300ppm and saturated H2S concentration by slow strain rate tests and influencing factors of different H2S concentration and welding material are analyzed to the stress corrosion cracking. It is showed that stress corrosion cracking is more sensitive above 1300ppm H2S concentration. With the H2S concentration increase, the maximal stress, elongation and the time of rapture decrease on heterogenic welding joints 1Cr9Mo/45 and 0Cr18Ni9/1Cr9Mo. But they are not influenced to the joint 0Cr18Ni9/45. It is also concluded that replacement of A302 by Inconel182 can improve the corrosion resistance of 1Cr9Mo/45 but can not make any influence on the joints 0Cr18Ni9/45 and 0Cr18Ni9/1Cr9Mo
Analysis and Design of Z-Axis Supporting Plate of High-Speed High-Precision PCB CNC Driller
Authors: He Ling , Tang Min Li , Wu Heng Yu , Lei Ya Li , Wang Zhi Gang
Published: October 2011

This paper is based on Abaqus finite element software platform and Tosca structure optimization software, with the purpose to improve the strength-to-weight ratio of Z-axis supporting plate. The writer adopts weight topology optimization to carry out finite element analysis, topology optimization analysis and verification to Z-axis supporting plate, thus getting the best material allocation solution. The modal frequency and dynamic performance of the product are greatly improved at the same time when ensuring the static precision of the product.
Analysis for Formation Mechanism of Local Cluster of Enterprises Based on Self-Organization
Authors: Liang Tao
Published: October 2011

This article analyses the formation mechanism of local cluster of enterprises based on self-organization. First, it explains the meanings of formation mechanism of local cluster of enterprises, then analyses the prerequisite to form local cluster of enterprises, and then, concludes the formation mechanism of local cluster of enterprises, finally, advises the government how to form a local cluster of enterprises.
Artificial Neural Network Based Intrusion Detection Method Combined with Manifold Learning Algorithm
Authors: Chen Jin Guang , Li Zhi Xiong
Published: October 2011

Computer and network security is one of the most emergency issues for a large scale of applications. The unexpected intrusion may make terrible disaster to the network users. It is therefore imperative to detect the network attacks to prevent this kind of violations. The intrusion patter recognition is now a hot topic in this research area. The use of the artificial neural networks (ANN) can provide intelligent intrusion detection. However, the intrusion detection rate is often affected by the input feature vector of the ANN. This is because the original feature space always contains a certain number of useless features. To overcome this problem, a new network intrusion detection approach based on manifold learning nonlinear feature dimension descending and ANN classifier is presented in this paper. The locally linear embedding (LLE) algorithm was used to reduce the original intrusion feature space. Then the satisfactory ANN model with proper input features was obtained. The efficiency of the proposed method was evaluated with the real intrusion data. The analysis results show that the proposed approach has good intrusion detection rate, and performs better than the standard GA-ANN method.