bluuebunny/crossref_metadata_2025 huggingface dataset:
The Analysis of the Bolted Roadway Stability with Discrete Element Method
Authors: Wang Rong Chao , Wang Chun Qiu , Zhang Lei
Published: October 2011

The model is generated in the paper taking the fully mechanized caving face in Yang-village mine, Yima group as engineering background, using UDEC software to analyze the influence of joint characteristics parameters on surrounding rock stability of fully-mechanized caving roadway, and from the aspects of the horizontal compressive stress between joint surfaces of roof, the roof sinking magnitude and surrounding rock failure, the fully-mechanized caving roadway is simulated with different anchorage forms and bolt length, with pallet and steel belt or not, different block sizes and different buried depths[1]. Through improved roadway supporting technology, the supporting effect was increased, the damage and destruction of the supporting to rock mass was reduced. The computed results were consistent with practical application. This shows that the technology has some directive significance for mining under the same geological conditions, and supports theoretical and practical basis for the mine's safety in production and sustainable development.
Study on Urban-Rural Industrial Distribution Based on Classification of Factor-Intensive Industries
Authors: Tong Guang Ji , Li Cun Gui
Published: October 2011

Balance development of urban and rural industries has become important foundation and momentum of forming a new pattern that integrates economic and social development in urban and rural areas, and the main way to optimize the urban and rural industrial structure in our country. Reasonable division and distribution of urban-rural industrial play an important part in promoting coordinated development of urban and rural industries. By setting indexes and using cluster analysis method, the factor intensity of thirty-eight industries was divided. According to the aggregation of urban space and dispersivity of rural space, this paper confirm that the knowledge intensive industries and capital intensive industries should be distributed in urban areas preferentially , and the labor intensive industries and land intensive industries should be distributed in rural areas preferentially.
The Finite Element Analysis on High Duty Bolted Joints of Slewing Bearing
Authors: Wang Xin , Liu Xue Xia , Cao Xu Yang , Zhou Feng , Zhou Yang , Wu Di
Published: October 2011

By reasonable assumption and considering the friction, contact, preload intensity, load eccentricity, bolt bending, and other nonlinear factors, we establish three-dimensional finite element model for the high duty bolted joint to reflect the bolt behavior and develop the finite element calculation method for static strength, fatigue strength and related stresses of bolt. By this method, we do numerous numerical simulation experiments to study the effects of preload intensity, support plate thickness on the bolt behavior. These results will guide designer to complete the slewing bearing design effectively and accurately, and these research ideas can be well applied to bolted joints study in other devices.
Using Auto-ID Technologies to Implement Real-Time Manufacturing Resources Tracking and Tracing
Authors: Li Hai Ning , Sun Shu Dong , Zhang Ying Feng
Published: October 2011

Typical challenges that manufacturing enterprises are facing now are compounded by lack of timely, accurate, and consistent information of manufacturing resources of shop floor. This paper presents a real-time Manufacturing Resources Tracking and Tracing Framework (MRTTF) based on Auto-ID devices such as RFID. Then, a configuration solution of equipping traditional manufacturing resources with Auto-ID devices is described. And the real-time information tracking flow of attached manufacturing resources (Men, Machines and Materials) is also illustrated. The presented framework and solution will provide real-time information of manufacturing resources for production mangers or supervisors to make accurate and optimal decisions.
Manufacturing of Fixed-Abrasive Polyethylene Wire Saw
Authors: Yao Chun Yan , Wang Jin Sheng , Xu Zhong Hua , Zhang Qiao Fang , Wang Ming Huang , Peng Wei
Published: October 2011

Fixed-abrasive diamond wire saw is widely used for slicing semiconductor materials. In this paper, a novel manufacturing method is studied by using polyethylene wire to replace the traditional metallic core wire. A new coating device of ultraviolet-curing for rapidly making diamond wire saw is developed. In terms of tensile strength experiments’ results, a high strength polyethylene multi-strand wire is finally selected as the core wire of the fixed-abrasive wire saws. Experimental results show that the high tensile strength of polyethylene multi-strand wire can satisfy the technical requirements of fixed-abrasive wire saws.
The Relationship of Symmetric Modification Parameters and Contact Line of Worm Gear
Authors: Wang Xiao Lin , Hao Xiao Ru , Zhang Xiao Sheng
Published: October 2011

By a reasonable transition of the meshing equation and the contact line equation based on the principle of spatial meshing, using matlab numerical calculation and graphical function to draw a diagram of modification parameters and contact line of worm gear. Proposing a fast and accurate method for distinguishing the type of contact line. For further analysis of worm gear meshing performance provided a useful value.
Research of Multi-Attribute Group Decision Making for Aviation Manufacturing Enterprise Material Supplier
Authors: Xiong Dan Dan , Yang Hai Cheng , Yang Yang
Published: October 2011

With more and more applications of manufacturing resource in networked manufacturing, material supplier evaluation and selection will become increasingly important. In the paper, the evaluation architecture of material supplier selection is introduced. Then, material supplier group decision making model is discussed. Lastly, multi-attribute group decision making for aviation manufacturing enterprise material supplier is verified based on fuzzy comprehension assessment by an illustration.
Design and Implementation of Hemodialysis Intelligent Management System
Authors: Yao Zhong Min , Bai Li Jing , Guo Fu San
Published: October 2011

With the development of hospital information technology, Informationization has been gradually applied into the departments of hospitals. Although the current information management of hemodialysis is better than manual operation, but it cannot meet the daily needs because of the particularity of each department. Aiming at this problem, I designed a system of hemodialysis intelligent management. The system can achieve the function of automatic placing stations by the designed scientific algorithm, sending automatic arrangement notifications by the SMS module and getting the information of inquiry and medical records automatically by the magnetic card module. After testing the system performs well, which greatly reduces the time-consuming and increases the efficiency of devices.
Correlation of Mechanical and Microstructure Development of Early-Age Concrete by Electrical Resistivity Measurement
Authors: Chen Jun , Jin Xian Yu , Tian Ye , Jin Nan Guo
Published: October 2011

In this work, the correlation of mechanical and microstructure development of early-age concrete was studied through electrical resistivity measurement. The inner enhancement of hydration products other than evolution of pore structure was identified as a vital factor for microstructural development of early-age concrete, which embodies in the increase of tortuosity a and significantly contributes to the growth of mechanical properties. Finally, a correlation between compressive strength and two crucial microstructural parameters (effective porosity ϕeff and tortuosity a) was built for the three mixes of concrete studied in this paper.
A Novel Approach of Eye Detection Based on Haar-Like Feature and SVM
Authors: Guo Yu Hang , Liu Jie
Published: October 2011

Recognizing the importance of eye detection technology in face detection and recognition, facial expression recognition, driver fatigue detection, and so on, the current paper presents a novel approach to eye detection in images based on AdaBoost and the Support Vector Machine (SVM). The proposed method can accurately detect eyes with different postures, facial expressions, skin colors, and glasses in a simple background image. First, a Haar-like feature AdaBoost classifier based on the developed training samples is used to detect eyes in images. An SVM post classifier trained by coordinates of the true and pseudo eye rectangles is then used to optimize the results. Experimental results show that the proposed method is fast, robust, and has high generalization capability.
A Robust Digital Watermarking Algorithm of Identification for Image Authenticity
Authors: Chen Hai Peng , Shen Xuan Jing , Lv Ying Da
Published: October 2011

To accurately determine whether an image has been tampered, a robust digital watermarking algorithm based on the frequency domain was proposed. Watermarks will be embedded in the middle frequency domain of the coefficient matrix, and combining with the JPEG luminance quantization table, better balance will be achieved between the watermark transparency and the robustness of the algorithm. Moreover, before being embedded in the host image, the watermark information is encoded using the chaotic sequence, to improve the security of the algorithm. Experiment results showed that, the watermarked image generated by the proposed algorithm has higher quality. When suffering JPEG compression, cropping and other tampering attacks, the image authenticity can be determined by the similarity between the extracted watermarking and the original watermarking.
An Image Recognition Method Based on Ant Colony Optimization Neural Network Using in Imaging Fuze
Authors: Wang Ke Yong , Xing Shi Kai
Published: October 2011

Target image recognition is an important issue in the information processing of imaging fuse system. In the paper, the main frame is proposed which can solve the problem of target image recognition and many computer simulation experiments are carried out. A recognition algorithm based on ant colony optimization and neural network is proposed. It overcomes the shortcomings of traditional BP algorithm and converges fast. The results of experiments prove that the presented algorithm can shorten the training time effectively and increase the accuracy of recognition, so it is very useful in improving the effective destroying ability of the missile.
An Integrated Model for Software Security Testing Requirements
Authors: Hui Zhan Wei , Huang Song , Liu Xiao Ming , Rao Li Ping
Published: October 2011

Security requirements engineers usually only need provide with software security requirements, and they unnecessarily specify software security behavior mechanisms, which are critical not only for software security design but also for software security testing. After discussing the relations and differences between security use cases and misuse cases, we provides an integrated model, SETAM, for software security testing requirements, which is based on security function testing use cases and adversary testing use cases..
Discussion on Product Perceptual Design in Information Age
Authors: Wang Min
Published: October 2011

Consumption demand has transferred from quantitative consumption to "perceptual consumption" at nowadays through qualitative consumption changes along with arriving of information age. Development direction for guiding thoughts of designing creation shall be pursuing of more harmonious and closer perceptual relations between user and commercial goods in the future. Product designing shall not only focus on integration of visual elements but shall also pay more attention to perceptual part produced by overall sense organ in product using process. This essay discusses on how to implement product perceptual design by carrying out visual, touching, hearing, smelling and other organ element analysis.
Fault Diagnosis of Low Speed, High-Loaded Bearing in Incomplete Rotating State
Authors: Cao Jin Hua , Zheng Hai Qi , Zhi Jian Zhuang , Cao Li Jun
Published: October 2011

Signals of Low speed, high-loaded bearings in incomplete rotating state have some characteristics, such as nonstationary, varying load, multi vibration resources and no character frequency. Traditional frequency analytical method can’t solve the problem of fault diagnosis of this kind of bearings. Start with angle domain, a new fault diagnosis method based on characteristics of angle domain is put forward in this paper. And the new feature characteristics, touching frequency and parts contacting angle, are extracted from the vibration signals and rotation signals. This method is applied to diagnose the fault of Low speed, high-loaded bearings in incomplete rotating state. The diagnosis result proves this method is feasible and valid.
Improved Intrinsic Time-Scale Decomposition Method and its Simulation
Authors: Lin Jin Shan
Published: October 2011

Aiming at relieving the mode mixing of the intrinsic time-scale decomposition (ITD) method used to process the intermittent signals, the improved intrinsic time-scale decomposition (IITD) method is proposed in the paper. The IITD method employs white noise which has the uniform power distribution in different frequencies as a reference to resolve the problem. Furthermore, a simulation signal was utilized to examine the performance of the IITD method as well as that of the original ITD method. As a result, the comparison between the results from the two methods indicates that the IITD method reflects an obvious improvement on the original ITD method for processing the intermittent signals.
Inventory Management with Uncertain Demands Based on Probability Methods
Authors: Liang Nai Wen
Published: October 2011

The inventory management problem with uncertain demands is considered in this paper. the possibility theory and credibility theory are employed to solve the problem regarding uncertain demands, and different order strategies and storage strategies according to the different customer’s demand are designed for rational inventory management. Finally, a rule is designed for choosing the storage strategy.
Kinematic Modeling and Simulation of Two Robots Coordinated Manipulation
Authors: Shi Lei , Shi Cheng Quan , Jiang Yi Chun
Published: October 2011

This paper carried out a method of transferring PUMA560 models in Pro/E to MATLAB . And then it rebuilds two robots 3D models in MATLAB by using the 3D Visualization in it .In addition , this thesis plans the trails of the two robots coordinated motion which satisfied the need of position and posture of the two robots coordinated work in the situation of non-collision . This paper also provides a secure and convenient method for the development and application of two robots .
Modal Analysis of Automotive Steering System Based on Finite Element Method
Authors: Chen Shu Ming , Wang Deng Feng , Tan Gang Ping , Zan Jian Ming
Published: October 2011

In order to understand the vibration characteristics of the steering system and provide suggestions for improvement, a model of the steering system was created based on finite element method (FEM). Also, the modal analysis of the steering system was presented, and the first twenty step modes were calculated and analyzed. The steering system was also evaluated from the resonance point of view. The result shows that the frequency of the first step mode is 31.578 Hz which is higher than the exciting frequency of the engine; also, the road roughness excitation frequency has a minor influence on steering wheel vibration.
Modeling and Simulation Research on Pavement Transducer Device Based on AMESim
Authors: Fang Gui Hua , Liu Jin Feng , Wang Xing Chun , Chen Chao
Published: October 2011

In order to solve the problems of transducer design, Modeling and simulation analysis carried out, establishment of spring stiffness, damping piston, the piston stroke, and the relationship between the system periods. In the simulation results on the transducer have been studied, analyzed and evaluated. The results showed that: The system designed matches with the actual requirement.
Optimal Parameters Analysis of Dynamical Vibration Absorption Lathe Tool with Large Length to Diameter Ratio
Authors: Qin Bai , Zhang Bo , Yu Xiao Dong , Zhang Yan Qin , Han Gui Hua , Li Jian Ying , Wang Quan Fu , Ji Ya Juan
Published: October 2011

The multi flexible body dynamical simulation model of dynamical vibration absorption lathe tool with large length to diameter ratio is built up according to the actual experiment lathe tool by using the software ADAMS and ANSYS. The experiment data which are consistent with the simulation result verify the correctness of the multi flexible body dynamical model. Aiming at reducing the peak value of system frequency response, the dynamical vibration absorption system is optimized. The optimized frequency curve shows that the system frequency response is improved obviously. On this basis the influence of the mass of heavy turning body on the vibration system is discussed. Also, the relationship of the mass of heavy turning body and the optimal system parameters including equivalent stiffness coefficient and equivalent viscous damping coefficient is studied. This offers the design considerations about the structure of the dynamical vibration absorption lathe tool with large length to diameter ratio.
Research on Improving the Sample Size of the Routine Monitoring Test for the Ammunition
Authors: Jiang Wei , Zhang Meng , Xu Peng Fei , Liu Yun , Liu Jun Bang
Published: October 2011

The two methods increasing the sample size are put forward for improving the routine monitoring test level of the ammunition: the first method is that increasing the sample size through improving the test level under the changeless confidence level; the second method is that increasing the sample size through improving the confidence level. The first kind error probability and the second kind error probability are decreased through two methods.
Degradation Path Modeling Method Based on Time Series Analysis
Authors: Gao Cheng , Jiang Min , Huang Jiao Ying , Wang Xiang Fen
Published: October 2011

In accelerated degradation test, it is essential to establish a suitable degradation path model of the component. In order to predict the life accurately, it is critical to determine the sensitive parameters. A degradation path modeling method based on time series analysis was proposed in this paper. The sensitive parameters were determined by time series stationary test, and a time series ARIMA model was established for the degradation of sensitive parameters. Taking TL431 as an example, the accelerated degradation tests were carried out to investigate the degradation of its performance parameters, and a degradation path model was established for the parameters. The results indicate that the proposed method is feasible for accelerated degradation test.
Research on the Multi-Objective Optimization Model of System-Level BIT Testability Index Determination
Authors: Zhu Chun Sheng , Zhang Qi , Su Fan Tun , Ran Hong Liang
Published: October 2011

By weighing reliability, maintainability, availability and life-cycle cost of equipment which are influenced by testability，the testability indexes of system level BIT are determined on the basis of maximum system reliability & maintainability and minimum the life-circle cost. The influence mathematical models of system reliability, maintainability, availability and life-circle cost are established. According to these mathematical models, the multi-objective optimization model of system-level BIT testability indexes is established. The multi-objective optimization model is solved using Non-dominated Sorting Genetic Algorithm II, and the validity of the multi-objective optimization model is proved through an example.
Structure Design and Kinematics Analysis of MRI-Guided Intervention Robot
Authors: Zhang Yong De , Du Hai Yan , Geng Li Wei , Li Yu Qin , Zhang Hong Xia , Zhang Yan Hua
Published: October 2011

MRI-compatible surgical robot technology is one of the most effective ways to improve the real-time image-guided surgical biopsy. In MRI environment, the robot design is facing the problems of high magnetic field and limited workspace. A pneumatic-driven MRI-guided intervention robot was designed for chest and abdomen surgical biopsy. Based on compatibility and workspace analysis, the specific structure design of the robot was carried out. Then robot coordinate system was established using D-H method and the kinematics analysis was conducted.
Study on Capacity Expansion Model and Arithmetic of Transportation Network with Distribution Centers
Authors: Dong Peng , Luo Zhao Hui
Published: October 2011

We consider a type of transportation problem with distribution centers. Solving this question by using auxiliary network: every distribution center in the transportation network is split into two nodes which are linked to form new arcs in the new network, enduing every arc with parameter vector, and turning this transportation problem into minimum cost flow problem. Basing on this point, the capacity expansion problem of the distribution centers and the paths in the transportation network are also considered in the article.
Multi-Angle Face Detection Using Back Propagation Neural Network
Authors: Ghazali Kamarul Hawari Bin , Ma Jie , Xiao Rui
Published: October 2011

In machine vision application, the main part to analyze an image is to identify its features which contribute to efficiency of the system. Many applications in vision system and image analysis used face detection as a feature of their whole system development. In application such as video surveillance, fatigue detection and security system, face is a fundamental step in the analysis before proceed to system implementation. It is very challenging to recognize a face from an image due to the wide variety of face and the uncertain of face position. In this paper, we propose a neural network based approach to identify multi-angle face which falls into five categories: all left-side face, half left-side face, positive face, half right-side face, and all right-side face. More than 100 images of each category have been used for training and testing of face detection and its features was extracted to be an input to BP neural network. We analyzed the result of training and testing set of neural network and the best classification achieved was 90.7%.
A Numerical Study of Flow Field and Oil Water Separation in Vertical Deadlegs
Authors: Ding Kuang , Zhu Hong Wu , Zhang Jin Ya , Wang Chuan , Hao Jian Sheng
Published: October 2011

Deadleg is a kind of blind pipe connected with a main pipe used for fluid transportation, which has distinct flow characteristics. This work aims to investigate the complex flow, oil/water separation and the relation between fluid flow and water concentration of a vertical deadleg. The investigation was based on the solution of algebraic slip mixture model, which calculated the continuity and momentum equations for the mixture of oil and water, and solved the volume fraction equation for the secondary phase. The computed results indicated that the mixing zone of the deadleg consists of two circulation vortexes and the whole mixing length depends on the inlet flow intensity. Furthermore, distinct oil/water stratification forms in the stagnant zone, and the maximum water volumetric concentration is related to the length of stagnant zone and also influenced by the flow intensity of the main pipe, which could increase from 25% to 72% with inlet velocity ranges from 0.75m/s to 5m/s.
An Optical Fiber Sensor for Measuring Light Absorption in Suspension Solutions
Authors: Xiong Fei Bing , Djeu N , Zhu Wen Zhang
Published: October 2011

An optical fiber sensor based on attenuated total reflectance (ATR) for extraction chemical information from highly scattering turbid materials has been evaluated. The influence of particles on bulk absorption and ATR transmitted spectra of micron-sized graphite flakes and spherical glassy carbon suspensions were investigated. The ATR transmitted spectra of coiled fiber-optic sensor in those suspensions with various concentrations are insensitive to scattering of suspended particles, especially for graphite flake suspensions. The reason for different influence of graphite flakes and spherical glassy carbon particles suspensions on e ATR spectra analyzed. This study demonstrates that fiber-optic sensor based on ATR technique is a feasible technique in application for monitoring turbid suspensions.
DOE Analysis of the Influence of Sand Size and Pouring Temperature on Porosity in LFC
Authors: Izman S. , Shayganpour Amirreza , Idris M.H. , Jafari Hassan
Published: October 2011

Lost foam casting is a relatively new process in commercial terms and is widely used to produce defect free castings owing to its advantages like producing complex shape and acceptable surface finish. In the present research, experimental investigations in lost foam casting of aluminium-silicon cast alloy, LM6, were conducted. The main objective of the study was to evaluate the effect of different sand sizes and pouring temperatures on the porosity of thin-wall castings. A stepped pattern was used in the study and the focus of the investigations was at the thinnest 3 mm section. A full 2-level factorial design experimental technique was employed to plan the experiment and subsequently identify the significant factors which affect the casting porosity. The result shows that increasing in the pouring temperature decreases the porosity in the thin-wall section of casting. Finer sand size is more favourable than coarse size for LFC mould making process.
Dynamic Modeling and Evaluating of Moving Object Tracking with Correlated Measuring Noises
Authors: Zhu Hong , Guan Gui Xia , Wu Min Hua
Published: October 2011

In moving object positioning and tracking, the GPS positioning error is colored noise with time correlations. According to the results of time sequential analyses, the model of the positioning error can be described as a AR(10) model. In order to decrease the computations and realize the real-time positioning and tracking of the moving objects, the AR(10) model is fit to be a 2-order Markov process. The positioning data act as the measurements, the system equations are built, in which the measuring noises have time-correlation. Subtracting the adjacent measurements, the correlated portions of measurements are eliminated, and the differences of the measurements are considered to be the new measurements. The new system equations are rebuilt and the recursive state evaluation algorithm is given, in which the measuring noise is white noise. It avoids higher-order matrix inverse calculations and fewer memories are needed. The simulation results show that the 2-order Markov process can effectively fit to the GPS error model and the precision of the moving object positioning is increased.
Dynamic Response and Dynamic Load of Wind Turbine Planetary Gear Transmission System Under Changing Excitation
Authors: Yang Jun , Zhang Li Ping
Published: October 2011

The dynamic model of planetary gear system was built up with the consideration of the running characteristics of variable speed and variable load of wind turbine transmission system. The expression of dynamic factor which described by external change load and deformation vibration was studied. Then, the response characteristics and dynamic load of planetary gear system of wind turbine have been studied with the consideration of changing external load and time-varying stiffness, mesh phase and nonlinear stiffness of bearing. The results show that: the frequency response of system reflects the low frequency component of external load. The influence of external incentives on sun gear and planet gear is very significant, and the distinguish between low frequency vibration and high frequency vibration is obvious. The flexibility of system has an obvious impact on dynamic load of bearing. The results lay a foundation for strength design and fatigue analysis of wind turbine gearbox.
The Computation of Grinding Parameters for the Modified Shaper Cutter
Authors: Huang Chao , Li Guo Long
Published: October 2011

Grinding process is regarded as the most effective way to generate the tooth profile of spur shaper cutter. However, for the purpose of generating a tip chamfer of gear, the semi-topping is always required on the tooth surface of shaper cutter, which is difficult to process by grinding wheel. This paper proposes a method to compute the profile of grinding wheel which is used to process the spur shaper cutter with a semi–topping. Firstly, translate the points on the surface of shaper cutter into auxiliary rack; Secondly, building the relationship between the coordinate system of grinding wheel and coordinate system of auxiliary rack; Lastly, the points on the surface of auxiliary rack are translated into the coordinate system of grinding wheel based on the relative motion between the grinding wheel and shaper cutter.
Study on the Construction of Practice Teaching Base for Petroleum Engineering
Authors: Wang Xi An , Li Wen Hua , Wang Zhen Ku , Liu Jing Cheng
Published: October 2011

The construction of practice teaching base on campus which is close to the front of production line and which can reflect the real environments of oil fields is an important condition to train applied and high skilled talents of petroleum engineering major. This paper, by combining the requirements for practice teaching base for the construction of petroleum engineering major, summarizes the construction targets of practice teaching base for petroleum engineering, and further puts forward the idea and principle of constructing the practice teaching base, analyzes the functions which shall be met for practice teaching base for petroleum engineering and discusses the construction mode of practice teaching base.
Feasible Tertiary Sewage Water Treatment Technologies
Authors: Zhang Hui Zhi , Fan Dai Di , Mi Y. , Li Long
Published: October 2011

The design mainly introduces a basic technology of the wastewater tertiary treatment, summarizing the disadvantages and advantages, and designing the process of the feasibility tertiary treatment. This scheme not only is simple, feasible and scaled, but also uesed for houses or a small place. Effluent of high quality is formed.
Fuzzy Theory and AHP Applied to Port Urban Logistics Competitiveness Evaluation
Authors: Liu Xue Lian
Published: October 2011

This paper aims to construct analysis model of port urban logistics arrangement using Delphi and analytical hierarchy process method, furthermore, establishment of fuzzy theory and analytical hierarchy process model and factor set. And calculate every index weight with the weighting method--Gl based on differential principle and appraise comprehensive efficiency using fuzzy theory and analytical hierarchy process evaluation method. Using the average weighting method make quantitative disposal with indexes of appraisal factors and educes port urban logistics comprehensive efficiency outcome. And in so doing，validating Shanghai port urban logistics competitiveness actually which respects its efficiency status.
High-Accuracy Shape Construction of Porcelain and Exhibiting on Web
Authors: Wu Hai Bin , Wang Li Quan , Cui Jing Yan , Jiao Yang , Yu Xiao Yang
Published: October 2011

The key of 3D measurement technology based on coded structured light for high-accuracy reconstruction of porcelain exhibited on Web, is to ensure measurement accuracy and anti-interference capability on high reflectance surface. So an edge Gray code method for structured light system and related technologies are proposed under interference by high reflectance ratio and color of measured surface. Firstly, encoding and decoding principles by Gray code stripe edge reduce theoretical quantization error and decoding error against traditional Gray code, so measurement accuracy is improved. Secondly, stripe edge sub-pixel location method based on grey curve intersecting points is designed to reduce edge location error caused by diffusion from white stripe to black stripe. Measurement system was established according to mathematic model. Experimental results show that error of measured high reflectance unicolor standard plane is 0.60.8mm, and reconstructed porcelain shape has same visual effect as the real one. Finally, based on Java 3D, interactively exhibiting on Web was explored.
Integrated Management Methodology for Sustainability and Land Use of a River Basin
Authors: Chen Ching Ho , Liu Wei Lin , Chiou Ing Jia , Liaw Shu Liang
Published: October 2011

Sustainability assessment of a river basin is usually performed separately from the planning of land uses within the basin. This work develops a methodology for simultaneously considering environmental, social, and economic sustainability for land use planning in a river basin. Systems thinking, managing for results (MFRs), and the driving force-pressure-state-impact- response (DPSIR) framework are firstly used to develop a management framework and an indicator system, which is integrated into an optimization model to simultaneously maximize the sustainability of the river basin. Moreover, a prototype of integrated management system for sustainability and land use for a river basin (IMSSLU) is established to obtain the optimal strategy. The Shetzu River Basin in Taiwan is used as case study. The sustainability of this river basin can be increased as the land use plan is developed. The optimal land use strategies for the Shetzu River Basin and its land divisions can both be generated. The total quantities of pollution discharges and resource uses of each drainage zone are also obtained. Analytical results indicate that the proposed methodology and IMSSLU system can be used to help the authorities to devise the optimal land use plan for a river basin while simultaneously pursuing its optimal sustainability.
Investigation on the Mechanism of Energy Saving and Efficiency Enhancement for Fluid Ejector
Authors: Xing Gui Ju , Li Zi Huan , Zheng Hong Liang , Wang Jian , Jiang Fu Sheng
Published: October 2011

Experiments were implemented on a prototype commercial liquid ejector to measure its hydraulic efficiency and the change of which along with a certain range of water flow rate variation was also recorded. Based on theoretical analysis and numerical simulation methods, we improved the ejector’s structure by modifying the suction part of it. Four ameliorated ejector structures, with increased pumping power and reduced flow resistance compared to the prototype, are proposed. Under the same working flow rate condition, flow field computations were conducted on the prototype and the four improved structures. The computational results show that the pumping power increases by 75.97%, the drag coefficient reduces 0.0908, the maximum turbulent energy dissipation rate decreases by 38.88% and the absolute value of the efficiency increases by 13.66%. The work validates the correctness of the theoretical analysis about the mechanism of energy-saving and efficiency enhancement for fluid ejector, and provides a more effective method to improve the performance of liquid ejector.
Fault Diagnosis of PT Fuel System Based on Particle Swarm Optimization-Support Vector Machine
Authors: Wang Dong , Wang Xin Qing , Wang Xiao Long , Liang Sheng , Zhao Yang
Published: October 2011

In order to overcome the difficulty in selecting parameters of support vector machine (SVM) when modeling the PT fuel system fault diagnosis, SVM optimized by particle swarm optimization (PSO) algorithm was proposed. The PSO-SVM model was established and the fault multi-classifiers of the SVM were got. The pressure signal of the PT fuel inlet and outlet at different rotational speed and conditions was collected. The algorithm of PSO-SVM was used to train and recognize the pressure signal. The result of experiment confirms the validity of this method through comparison of the BP-NN, SVM and the PSO-SVM.
Simulation of Inking System Based on Elastohydrodynamic Lubrication
Authors: Liu Lin Lin , Lu Fei , Bai Jing Yi
Published: October 2011

the inking system is one of the important components of an offset printing machine and an inking system with good performances is the necessary condition for high quality printing. In this paper, the Reynolds equation for ink transfer was deducted on the basis of the elastohydrodynamic lubrication theory and the relation model between parameters of the roller, speed, pressure and ink thickness in gap of rollers was established by applying the Hertz contact theory, so as to obtain the minimum film thickness equation in gaps of rollers. The influences of roller speed, pressure and size on ink thickness in gaps of rollers were analyzed. In addition, the ink transfer model was modified under the condition of considering retention of ink in gaps of rollers by using Roland700 as the object and the influences of printing speed on inking characteristics were analyzed by applying the method of computer simulation. The results showed that the longer was the inking stabilization time of the system was, the higher the printing speed was.
Study on Anti-Scale Measures of Shaft in Shunan Gas Mine
Authors: Qiu Zheng Yang , Qiu Kui , Wang Zhi Qiang
Published: October 2011

In order to put forward the Anti-scale measures of shaft in Shunan Gas Mine and guarantee the normal production of gas field,the composition as well as the water quality and scaling type for gas production water at the typical shaft mouth of Shunan Gas Mine are analyzed and the scaling mechanism of shaft and the influencing factors are described as well as the anti-scale agent and the solid anti-scale blocks pertaining to the scaling of shaft in Shunan Gas Mine are obtained.
Study on Quality Control of the Low-Sugar Preserved Kiwifruit
Authors: Zhang Kai Sheng , She Jiao
Published: October 2011

In the process of Chinese gooseberry pre-served fruit, many factors affect the quality, the temperature adjustment process of steam heating can is a key role can control the quality of preserved kiwi fruit .Using ARM embedded microprocessor， according to the Parameters Self-tuning Fuzzy PID adjustment methods ，Control the temperature process of steam heating can，can be effective control the sugar contents of Chinese gooseberry pre-served fruit, is a core technology in the process of Chinese gooseberry pre-served fruit. This method has been successfully applying in Shan xi preserved kiwi fruit processing enterprises, also realizing a certain economic benefit.
Principle and Applications of Grinding Wheel Regenerator
Authors: Sun Qing Zhou , Jing Jian , Zhang Pu Qing , Zhao Zhong Kui , Wang Jian
Published: October 2011

Grinding wheel regenerator is composed of grinding wheel, fluidized bed, airblower, motor and dust-removal system. After being put into regenerator, used-sand is in the fluidized state under the action of airflow. Grinding wheel, buried into sand, rotates with high speed. During above process, strong collision and friction are caused between sand and high-speed rotating grinding wheel, machine body and sands, which make adhesive film peeled off and used-sand regenerated. The paper introduces operation principle of grinding wheel regenerator and studies experimentally about the influence of regenerator’s rotate speed on sand breakage rate. The study reveals that rotate speed has effect on breakage rate of reclaimed sand. Sand breakage rate increases with the raising of rotate speed.
Thoughts on Unconventional Oil and Gas Development in China
Authors: Guan Xiao Xu , Fan Yi Xuan , Cao Qiang
Published: October 2011

With the era of high oil prices and prominent contradict between domestic oil and gas supply and demand, a boom of unconventional natural gas development has set off. While a major success of shale gas development has been made in the United States, it has also brought a successful experience and advanced technology to China. China also have carried out deep research and have achieved certain results in coal bed methane and tight sandstone gas, etc. However, difficulties and problems faced in the development process need to be carefully dealt with .
An Application of Multi-Sensor Data Fusion in SLS Rapid Prototype Manufacturing
Authors: Zhang Wei
Published: October 2011

There are some inevitable errors we can’t avoid in the process of powder laser sintering Rapid Prototype Manufacturing Cooling System. If we don’t take some measutes to eliminate the errors , they would influence the system’s operation directly, but if we adopt the traditional method, testing precision can’t meet the increasingly high requirement, while upgrading the hardware system will greatly enhance system cost, which can’t suit the empoldering and using of most systems. In this articles, when the number of sensors is less than 10 (N<10), a new method of data processing was introduced(including cooling water’s temperature, work jar temperature etc. ); use the distributing chart to eliminate inevitable errors, then adopt the method of arithmetic equilibrating and batch estimating to fuse the testing data, in order to estimate the true number.
Quasi-Static Failure Analysis of Composite Sandwich Panels
Authors: Hsu Ivan Yao
Published: October 2011

Due to many of advantages such as lightweighted, high-bending mechanical characteristics, composite sandwich materials play an important role in today’s structural manufacturing industry. This study is to aim at the low-velocity impact responses of sandwich plates subjected to a rigid, spherical-shaped impactor. The sandwich made of PVC core material (two kinds of core with different densities) and FRP facesheets (three kinds of fibrous laminae) were investigated experimentally and numerically. Because the dynamic behaviors of specimens due to low velocity impact is nearly the same to those in static indentation, the impact failure analysis of sandwich material can be simulated statically. Beside the experiment, finite element method was employed to analyze the static failure behaviors of sandwich panels. With the maximum stress failure criterion as well as a modified stiffness degradation method coded in the finite element software, the initial failure and sequential progressive failure process can be analyzed effectively.
Applying QFD to Improve the Project Management for Cloud Systems
Authors: Tzeng Jang Ruey , Li Shing Han , Chen Chih Had
Published: October 2011

To maintain stable operation and quality of cloud system, enterprises are required to form quality management project team, providing highest-level stability and security of cloud system by applying concepts of quality management. For this reason, the study starts with the perspective of quality control to develop a set of key success models for evaluating cloud system management and quality maintenance. The study attempts to apply basis of QFD and integrate the requirement guidelines of each cloud system management and maintenance into improving factors related to PMMM, in order to explore the relevance between cloud system quality and project management process. Finally, the study discovers the 4 requirement guideline factors and the 5 project management process in cloud system management and maintenance through quality model analysis and case verifying results of the study, that shows significant impact level on the project team in the implementation of improving cloud system management and quality maintenance.
Compensation Approach to Error of Perpendicularity and Mismatch Error of Position Loop Gains in CNC Machine
Authors: Zhao Guo Yong , Wang Shi Jun , Sui Wen Tao
Published: October 2011

The contour precision has been an important CNC machine accuracy index along with the increase of high precision complex parts NC machining. The error of perpendicularity and the mismatch error of position loop gains among linked axes are regarded as the prime reasons to bring about CNC machine contour error. After analyzing the influence of the error of orthogonal axes perpendicularity to CNC machine contour precision, a compensation approach is set up that the following error is corrected in each sampling period, by introducing a perpendicularity deflection parameter. After analyzing the influence of the mismatch error of position loop gains to contour precision, a cross-coupled control approach based on interpolation dots is developed to enhance the matching degree among all of the linked axes. Finally, the developed compensation approaches are testified on a CNC experiment table. The experimentation results reveal that the developed compensation approaches are effective to enhance contour precision.
Development and Research of the Mixing Fuel-Hydrogen Engine Control Unit
Authors: Zhang Xin , Cai Ling
Published: October 2011

An engine control unit mixing fuel-hydrogen based on microcontroller is proposed, including the system power modular, the sensor signal processing modular, the circuit of controller module, the actuator driving circuit module and the corresponding software system. The design and the control process of each module are introduced. The test results in the bench and roads demonstrate that the system can improve the fuel economy and deduce the emission significantly.
Deviation Analysis of Automobile Panels Welding Assembly Based on ANSYS
Authors: Li Liang , Feng Zhi Ming
Published: October 2011

In order to control the deformation deviation of automobile panels welding assembly, the author analyzed the assembly process of spot welding, and used a simplified finite element analysis method. In this method, work-pieces’ deviations are reflected by equivalent stress, and welding deformations are simulated by the coupling nodes. The author called C++ application in ANSYS FEA software, using stress data files as the interface, and therefore solved the problem of applying initial stress to automobile panels.
Finite Element Analysis and Lightweight Research on the Bed of a Large Machine Tool Based on HyperWorks
Authors: Jiao Meng , Guo Xu Hong , Wan Dong Dong
Published: October 2011

Taking the bed of a large machine tool as an example, static stiffness and modal analysis were studied by the software HyperWorks. Based on the results of the finite element analysis the structural topology optimization of the bed was compiled, with the optimization target is minimum volume of the rib plate and the bed constraint conditions are stiffness and natural frequency. The lightest topology shape of the bed was obtained in the premise of its stiffness and strength which can provide the guidance for the next precise design of the structure. The results showed that the mass of the bed was reduced by 8.58% while the stiffness improved 7.41%.
Principle of Error Analysis for Rapid Prototyping Technology
Authors: Peng An Hua
Published: October 2011

Parts precision is one of the key points in industrial application of rapid prototyping technology (RPT), and also the pivot of RPT research, but presently high precision is hard to achieve. This paper focuses the emphases on the principle of error analysis. Obtain chord errors corresponding to the number of triangles with pro/E software during the STL, and the formula for computing stair errors taking the quarter of sphere for an example during the slicing. In the end, propose the measures to improve the principled errors, viz. sloping slicing, adaptive slicing, direct slicing and so on, and further propose the theoretical range of adaptive slicing thickness.
Fostering Creativity in Mechanical Engineering Education Based on Cooperation with Enterprises
Authors: Kang Lan , Liu Jiao
Published: October 2011

Mechanical engineering field requires engineers with more practical problem-solving experience and skills of thinking, working and acting creatively. But, how can we develop and encourage these important skills in undergraduates? This article describes a case of nurturing creativity in undergraduates through cooperation with enterprises. Through the study of cognitive learning and creativity, a series of educational procedures and strategies are presented, they involved in basic training of fostering creativity and higher-level training of developing creativity based on commercial projects. Questionnaires from students and the actual results demonstrate that the above strategies and methods for fostering creativity in mechanical engineering undergraduates have yielded good results and students benefit from them.