bluuebunny/crossref_metadata_2025 huggingface dataset:
Medical Bottle Tightness Detection Based on Digital Image Processing
Authors: Wang Bao Jun , Yang Guang Yan
Published: September 2013

This paper presents a medical bottle detecting system based on image processing, and completing the tightness detection task for the installation of vial and cap. Firstly, the image of the bottle is captured by using the background subtraction method; secondly, getting the ideal threshold T by the iterative formulae and carrying on linearization processing for image; then, the ideal target image of medical bottle can be obtained by using morphologic operations. Finally, using the 8-directional chain code to calculate the circumference, area and height of bottle. The image processing course and experimental results are discussed at the end of the thesis. The experimental result shows that this algorithm is effective and accurate.
Research and Realization of the Software Requirements Management Integration Platform
Authors: Tian Pei , Zhang Yi Fei , Li Wei , Li Tie Jun
Published: September 2013

This paper has innovatively put forward a requirements management integration platform which takes the requirements review as the core. The integration platform proposes a model of gaining discrete demand, realizes integration and the sharing of resources with other requirements tools, and also gives the management and selection methods of the requirements analysis review staff. The paper finally achieves a collaborative requirements review wizard system which can improve the standardization and efficiency of the requirements review.
Research on the Embedded Software Reliability Evaluation Model Based on Influence Factors
Authors: Tian Pei , Gong Li Na , Li Wei , Tian Wen Tao
Published: September 2013

This paper firstly analyzes the reliability Influence factors of the embedded software, then puts forward an embedded software reliability evaluation model based on BP neural network, finally the preliminary application and verification of the model is given.
Research and Application of Music Digitalization Based on MATLAB
Authors: Chen Meng , Wang Cheng Long , Zeng Qing Tian , Zhang Hai Zhong
Published: September 2013

Research and Application of Music Digitalization Based on MATLAB is introduced in this paper. Firstly, music theory and key technology of Music Digitalization based on MATLAB in the process are given. Secondly, an example is introduced to illustrate the process of music analysis and synthesis based on MATLAB. Finally, conclusions and Outlook are introduced.
Integration of Systematic RBAC Security Model and UML Model
Authors: Fan Bao De
Published: September 2013

System modeling of software generally does not include security modeling. System security strategy and security mechanisms are often developed as the system supplement and improvement measures, at the latter part of system development. The irregular processing method of security requirement brings great risks to the latter security maintenance and integrations between systems. The integration of RBAC security model and the usual UML models about a system was described and the integrated approach and process was given with an example in this paper.
Research on the Digital Earth Based on OpenGL
Authors: Wang Hong Wei , Quan Ji Cheng , Li De Jun , Xie Jun
Published: September 2013

OpenGL provides a good development platform for Digital Earth. With the development of three-dimensional computer visualization technology, the significant features of OpenGL will become more compatible with the trend of 3D GIS development. Through OpenGL, software technology and relative theories, especially with the progress of in-depth study of the Digital Earth, the goal building the three-dimensional digital globe has become possible, therefore, we can implement a three-dimensional methods on the initial development of Digital Earth by the visual programming environment of Visual C++ 6.0.
Finding the Good in Health Care System Based on Iteration Model
Authors: Zhang Tai Fa , Song Ming Juan , Zhang Hong Yan
Published: September 2013

According to the definition, objectives, and functions of the health care system, the performance of the system has been evaluated from the three aspects: effectiveness, equity, and efficiency. By replacement analysis and analytic hierarchy process, the model has been constructed. Considering the raw data and omitting life expectancy at birth and obesity rate, we find that some indicators are affected by the policy factor. Health care system in the United States has been compared with other countries which have different level by using the iteration model. The value of the evaluation function in the four countries is different, and the results show that the health care system in United States is the best among the four countries.
Research on Cooperation Mechanism of Multi-Agent Grinding Control System Based on Blackboard Model
Authors: Zhao Hong Wei , Qi Yi Ming , Zhao Dong , Pei Shi Hui
Published: September 2013

In order to solve the complex industrial control problems in grinding control,we construct multi-agent grinding control system based on the blackboard model in this paper. Through the study on the structure and control mechanism of the blackboard model, we design a framework for blackboard model in multi-agent grinding control system, divide and introduce the function model of the blackboard in detail, establish blackboard control agent to control and coordinate how the individual agent takes use of the blackboard resources centralizedly.Aiming at actual situations of the grinding control,we put forward cooperation mechanism multi-agent based on a combination of tasks sharing and results sharing, establish control decision agent to solve the conflict caused by multi-agent cooperation. The cooperation mechanism multi-agent grinding control system improves the execution ability of the individual agent, avoids the conflict caused by different goals and the competition of resources, ensures the coordinated executive of multiple tasks.
Transformation Formulas between Bézier Curve and Partial said-Ball Curve
Authors: Xue Wei , Xi Ping , Wang Yi Duo
Published: September 2013

Based on previous work, which presented theorems and algorithms for generating a new type of generalized Ball curve (Partial Said-Ball curve), the present study supplements the transformation formula from a Bézier curve to a Partial Said-Ball curve and prove the corresponding theorem. All the results are useful for the application of generalized Ball curves and their popularization in Computer Aided Geometric Design.
Quantitative Assessment of Expert's Lifting-Thrusting Manipulation in Acupuncture Based on Haptic Device
Authors: Miao Peng , Zhang Qi , Ji Yuan Yuan , Jiang Jun , Guo Hai Dong , Wang Fu Bo , Yan Zhen Guo
Published: September 2013

Acupuncture is a complementary treatment method, while its therapeutic effect is tightly related to physicians manipulation skill. Lifting and thrusting manipulation is an important acupuncture procedure which could enhance the outcome, e.g. the arrival of Qi. Traditional methods cannot quantitatively measure acupuncture manipulations which make difficult in teaching and studying. In this paper, we proposed a high precision and quantitative monitoring system based on commercial haptic device. Our system can obtain quantitative position, velocity and force information and visualize the lifting and thrusting manipulation in real time. As a simple but accurate recording solution, it would be useful in accumulation and investigation of experts' experiences.
Emergency Scheduling Model of Urban Rail Transit Based on Genetic Algorithm
Authors: Li Yi Jun , Fang Yu
Published: September 2013

Urban rail transit plays an important role in daily life and optimal emergency scheduling determines social and economic benefits. To solve emergency scheduling problem of urban rail transit, a mathematical scheduling model is proposed in this paper. Based on the characteristic of urban rail transit, this scheduling model considers the benefits of both passengers and rail transit operator. Furthermore, on the basis of the model, three sorts of emergencies, such as closure of stations, outage of metro lines and surge of passenger flow are described and formulated, thus, model is solved through several GA operations. The testing results show that the model can accurately reflect the change of rail transit network during emergencies and quickly provide an effective emergency scheduling scheme.
The Application of Decision Tree in Security Audit
Authors: Shao Dan , Wang Yan Bai
Published: September 2013

Network security audit is an important part in network security system, which, to some extent, makes up for the deficiencies in firewalls and intrusion detections. According to the characteristics of the network data, the traditional decision tree model is modified, and the application pattern in which the decision tree model is used to network data security audit is also proposed. Simulations show that the decision tree classification model not only is adaptive to the characteristics of network data, but also can prevent malicious attacks effectively. The effects of the attributes such as IP, port, and protocol type on classification are also uncovered.
The Limit Price Strategy Analysis of Integrated Medicine Supply Chain Based on Government Regulation
Authors: Shen Liang , Wang Yu Yan
Published: September 2013

Considering the integrated medicine supply chain, and introducing the government limit pricing and subsidy mechanism, the pricing strategy of integrated medicine supply chain was studied in this paper. And the optimal strategy in the face of market fluctuations caused by unconventional emergencies based on government regulation was given. The study shows that, under different subsidy levels, the optimal production volume, retail price and profit of the supply chain are related to production cost, market size, government regulation and government subsidy; governments limit price regulation on medicines is welfare for both consumers and retailers, and it is favorable for medicine supply chains normal development.
Research on Network Learning Mechanism of Enterprise Network Resource Coordination
Authors: Shi Yong Gui , Song Yan Tao , Ma Shi Meng , Yan Jian Fen
Published: September 2013

Enterprise network belongs to complex adaptive system. The coordination of enterprise network resource refers to the rules that enterprise network members are able to comply with and unity action in order to achieve the expected goal. The rules mainly include opportunity discovery mechanism, communication mechanism, strategy consultation mechanism and the network learning mechanism. Network learning in the process of enterprise network resource coordination is in order to achieve sustainable development the behavior subject in the network would access to network resource in a larger limit, actively adjust itself to accommodate the other behavior subjects, and commonly adjust the network resource coordination rules to adapt to external environment. Therefore, network learning mechanism in the process of enterprises network resource coordination is the study of the summary of experience and lesson to the coordinated activity afterwards of the network behavior subjects, through summing up, modify, perfect and discover the new rules. It can divide into two stages: credit assignment stage and new rules discovery stage.
The Establishment of Production Capacity Evaluation Indicator System Based on R-Cluster and Coefficient of Variation
Authors: Tao Li Yan , Li Zu Da , Zhang Man
Published: September 2013

Discrete manufacture is a non-continuous production process. Accordingly, factors of production capacity are relatively complex. In order to determine the status of enterprise’s production capacity, this paper selects production capacity evaluation indicators extensively from product output capacity, manufacturing resources capacity, dynamic adaptability, and management coordination capacity. A method based on R-Cluster and Coefficient of Variation is proposed, which uses the combination of quantitative and qualitative analysis to classify factors in different aspects. Besides, Coefficient of Variation is applied to screen out the outcome indicators that have a bigger identification capability. Results and analysis show that 46% of indicators can be used as the final indicator system to reflect 98% of original information, which reduce complexity of evaluation.
Research the Internal Flow Field of Valve Stem Leakage
Authors: An Yan Tao , Ma Ru Jian , Wang Yong
Published: September 2013

Establish valve stem leakage flow channel model, apply the CFD numerical simulation the internal flow field and noise. Research shows that it is no effect on the valve inlet and outlet flow field when the valve stem leakage. It is no effect on the valve body flow field and the greatest influence the balance cavity flow field. Changing the flow direction of the balance cavity and produce left vortex, it break left vortex of right part. New tremendous noise sources appear the balance cavity and improve the noise of surrounding areas.
Study the on Time Delivery Based on Product Lifecycle Management in Supply Chain
Authors: Chen Hong
Published: September 2013

The current business competition happens among supply chains instead of the companies. In order to close the gap between product design and the production to obtain the competitive advantage, the New Product Pilot Run is proposed to be added into the Product Lifecycle Management from the perspective of the production and operation management in Supply Chain Management. The demonstration shows the benefits of this improved Product Lifecycle Management are to close the gap between Design and Manufacturing and are helpful to on time delivery new product successfully to market.
The Study of Buffer Allocation with Travel Time in Stochastic Production Flow Line
Authors: Pan Xiao Yong , Wu Jiang , Zhang Quan Wei , Lai Dong , Fu Xin , Zhang Chen
Published: September 2013

This paper studies the problem of allocating buffers in stochastic production flow lines with product travel time. We build a model that decomposes the production line into the S-B-S (Station-Buffer-Station) subsystems, and use queueing theory to aggregate the subsystems. Experiments are designed for both balanced and unbalanced production lines, and with the computational results, some general rules for the buffer allocation problem are proposed.
The Effects of Demand Randomness in Newsvendor Model
Authors: Lin Zhi Bing
Published: September 2013

In this paper, we consider a newsvendor model while its demand randomness is changeable. We analyze how the demand randomness affects the decision variables and objective functions in two difference situations: (1) the retail price is fixed;(2) the retail price is changeable. In first situation, we characterize the optimal order quantity, expected profit and variance of profit based on the benchmark model. In second situation, we show that the expected profit is joint concave function with respect to order quantity and retail price, also give the first order conditions. Finally, we use number analysis to show the effects of demand randomness on optimal retail price and order quantity
Study on Multi-Objective Optimizing Model of Cigarette Production Line
Authors: Yin Jing , Wang Wei Ling , Zhu Huan Zhi
Published: September 2013

Based on the distinct characteristic of the cigarette production process, the production planning and scheduling of the packing line is described as the multi-objective mixed-integer programming model to decide the sequence and quantity of all the products, whose objective is not only to meet delivery date, but also to minimize all theprocessing costs and the transforming time in the process. The effectiveness of this model can be well verified in the scheduling decision support system for the production of the packing of real company.
Design and Application of Project Management System for Project-Driven Equipment Manufacturing Enterprise
Authors: Chen Yan Xia , Guo Shun Sheng , Du Bai Gang , Sun Li Bo
Published: September 2013

The production mode of equipment manufacturing enterprise is large single-piece production driven by project for customer personalization. This is complex in a large project, where having so many involved resources, persons and content can become more difficult to manage. Whereas, the current project management system mainly focuses on some single functions and ignores the requirements of project lifecycle for process tracking management. Therefore, on the foundation of investigation and analysis, the models of material flow and cash flow are proposed to monitor the implementation process of project and developed a lifecycle-oriented Project Management System (PMS) by using ASP.NET platform and SQL SERVER database technology in equipment manufacturing enterprise. Finally, the application effect of PMS software in equipment manufacturing enterprise demonstrates its feasibility and effectiveness.
Key Factor Extraction of Supply Chain Performance Based on Heterogeneous Selective Ensemble PCA
Authors: Zhang Cong Hui , Zhao Nan , Shao Hong Yu
Published: September 2013

It is valuable for supply chain management to analyze and evaluate the operation performance of supply chain, and use timely and accurate operation state feedback to adjust the system to keep smooth running. Aiming at the complexity and uncertainty of supply chain, this thesis put forward a heterogeneous selective ensemble principle component analysis (PCA) algorithm based on fuzzy integral via Bagging ensemble learning. Besides, by using dimension reduction on high-dimensional data set, it realizes to extract the key factors of supply chain performance and breaks the bottleneck that problems in supply chain management cannot be recognized rapidly or analyzed by traditional performance evaluation method. According to the empirical research on survey data of supply chain performance at C Group, the algorithm is proved be effective.
The Optimization Research on the Green Supply Chain Network
Authors: Fang Yan Jun , Wu Meng Na
Published: September 2013

The green supply chain is subject to the attention of environmental management and supply chain management. It is contained all levels of "green" requirements from suppliers to consumers and it is a complex system. The green supply chain network formation is important to its objective. In this paper, the green supply chain network containing four levels including suppliers, manufacturers, consumers and recyclable waste collectors is designed. A multi-objective optimization model that captures the trade-off among the revenues, costs and environment influence is proposed. Then it is give an example of numerical analysis and get agents decision.
Study and Application of Supplier Performance Evaluation System Based on the Triple-A Supply Chain
Authors: Dong Hai , Dong Shuang
Published: September 2013

With the rapid development of economic globalization and the increasing international competition, enterprises pay more and more attention to external resources in order to save costs and strengthen their core competitiveness. Thus, the supplier becomes one important competitive factor for manufacturing industry. Combining with the characteristics of the triple-A supply chain, enterprises are helped to evaluate and select suppliers with scientific and effective ways. Firstly, the three characteristics of the triple-A supply chain, including the agility, adaptability and alignment, were analyzed and studied; Secondly, a set of supplier performance evaluation system was designed on the basis of the triple-A supply chain theory, and the weight of index system was designed by using EAHP. Finally, numerical examples show that the selection of superior suppliers is provided a good support by the supplier performance evaluation system based on the triple-A supply chain.
Research on Separating Mode of Business and Logistics
Authors: Shi Yong Gui , Li Hai Xia , Song Wan Jie , Yan Jian Fen
Published: September 2013

In the market economy, wholesale industry is showing its important status and role on merchandise distribution. However there are some phenomenons that hindering behind the development of wholesale industry, therefore solving these problems becomes important task. Commerce and logistics separation refers to the commerce and logistics separating in the time and space, logistics is no longer entirely depending on the transfer path of the commerce. It can obtain lots of benefits such as reduce the cost of storage, transportation, handling and logistics management. In order to promote the transformation upgrading of wholesale industry, several measures should be taken to allocate function of downtown business market and suburban logistics center rationally. The steps includes upgrading the wholesale market, developping the third party logistics, planning the logistics infrastructure synthetically, improving the logistics management level and enhance the informatization level of the related enterprises.
Study on Railway Passenger Service Based on Customer Perception
Authors: Zheng Chen , Hu Bao Min , Bei Li
Published: September 2013

Three major links of railway passenger transportation service including ticket selling, waiting and travel on-board are introduced in view of customers, which display the outline of China railway transportation briefly. China railway is entering high speed railway generation. It is facing a more competitive market. It must works hard to improve its service to enhance passengers satisfaction in order to attract more customers. Customers interest must be put in the first place whether tangible or intangible service is supplied.
Numerical Simulation of Shock Wave in Air Based on FCT Method
Authors: Li Ying , Li Xiao Bin , Wang Yu , Zhang Wei
Published: September 2013

Blast wave is numerical simulated based on FCT method. According to the comparative analysis, taking Henrych empirical formula as a standard, FCT method is more accuracy than Godunov method. Moreover, it has been found that the numerical accuracy is insufficient when the distance is small, it is necessary to develop and modify the numerical method continuously.
Study on Virtual Reality Techniques Used in German Teaching
Authors: Jia Yu
Published: September 2013

Virtual Reality (VR) by simulation study for multimedia teaching system, which provides the user with a simulation of a real-world environment for users to derive useful knowledge. Virtual Reality direction of research prospects is very large, but the difficulty is very great. In this paper, university network multimedia teaching system implementation, mainly images and multimedia information how to synchronize voice problems, and more due to network dissemination of information arising from end to end demonstrations and presentations jitter problems. Articles for both network multimedia teaching system in the main problems are given to solve the problem of multimedia information synchronization solutions and receive multimedia data buffering strategy.
Creation and Practice of Teaching System on Engineering Training for Training Distinguished Engineers
Authors: Miao Xian Wen , Yuan Gen Fu , Gu Yuan Qiang
Published: September 2013

Whereas urgent needs of high-quality engineering and technical personnel and the current situation of higher education, the Ministry of Education appropriately proposed the training program of distinguished engineers. Based on the training object of high-quality applied talents and the requirement of education and training plan of distinguished engineers, we explore and practice issues as position of reform of the practice teaching, creation principal of education system of engineering training, how to improve the engineering practice and innovative ability of students and the means of university-enterprise cooperation, which we received better teaching results. Key words: Distinguished engineers, education system, engineering practice ability, innovative ability, university-enterprise cooperation
“Forgettingness” Parameter as a Criterion for Assessing the Quality of Teaching Physics to Future Engineers
Authors: Gnitetskaya Tatyana N. , Ivanova Elena B.
Published: September 2013

This article describes a quantitative approach for assessing the quality of training engineers. Authors propose the quality of knowledge to be a result of comparisons of current progress results with the normative ones. If the current results are close to the normative, the teaching can be considered to be qualitative. Using a quantitative device of the theory of intra and inter-subject relations (T.N. Gnitetskaya, 2005) the evaluation of connectedness of physics and mathematics courses for engineering specialties was held. The forgettingness parameter was calculated.
Research on E-Commerce Teaching System
Authors: Ren Xiang , Liu Bin , Jiang Huan Jun
Published: September 2013

With the development of Internet business applications, enterprises pay more and more attention to operations of e-commerce business. It is an important way of improving the practice of e-commerce teaching to take the enterprise business problems as a case and to enrich practice teaching material. In this paper, it refers to the study on reform of e-commerce teaching model, combined with the school’s teaching practice of e-commerce, and puts forward some ideas for reform of e-commerce practice teaching in order to play some positive impact on teaching in the future.
Analysis of Development of Real Estate Industry Based on FA and CA
Authors: Shi Xiao Chun , Jiang Deng Ying
Published: September 2013

With the development of market economy, the real estate industry has become a driving force of the pillar industry of China's economic growth. The residential housing casing is used to construct the index system of real estate development. And on the combination of factor analysis and cluster analysis, this paper studies the real estate development status of China with the SPSS. By extracting three main factors that affect the development of residential housing industry, and with the factor score, the real estate development status of the 31 provinces and cities nationwide are classified and sorted. Last the causes and results of the classification are analyzed, and some targeted countermeasures are proposed.
Numerical Analysis of Aerodynamic Noise in a High Parameter Pressure Reducing Valve
Authors: Wei Lin , Zhang Ming , Jin Zhi Jiang , Chen Li Long
Published: September 2013

The high parameter pressure reducing valve (PRV) is a key device for regulating gas pressure in industrial processes. For the large flow and the instability of the high pressure and high temperature steam, the noise of the working PRV is large and also its energy consumption. A numerical analysis of the flow field and acoustic field of the inner high parameter PRV was conducted, the main cause of the aerodynamic noise was analyzed. Basing on the RNG k-ε Model and the Broadband Noise Source Model, the flow and acoustic power are calculated. Comparing the distribution of acoustic power level with the distribution of the velocity and turbulent intensity, it is shown that the main reasons for noise in the PRV are forming and shedding alternately vortexes and shock waves of jet flow.
Study of SO2 Detecting Using Non-Dispersive Infrared Based on Gas Filter Correlation Technology
Authors: Dong Zhi Feng , Shao Lian , Yang Hui Jia , Yao Rong , Yang Xiong
Published: September 2013

The present SO2 gas detection technology and research were studied. The paper aimed at the problems of low SO2 concentration, much interference with gases, long response time in the flue gas desulphurization process. The improvements were made based on non-dispersive infrared detection. Gas filter correlation technology was adopted to filter out the interference of other gases. In the hardware, thermoelectric release detector was used to detect the signal to shorten the response time. All these efforts are made to meet the requirement of realtime and on line control in the desulphurization system.
The Study of Production Process System of New Multi-Feature Continuous Reel Soft Pack Trademarks
Authors: Wang Zhi Long , He Bang Gui , Tian Qian Ru
Published: September 2013

Continuous reel low weight and multi-color soft pack trademarks are used in the high-speed large-volume packaging production process during some new production process. However, most of the existing equipments in the factory are discrete single production machine. Therefore the production process of multi-feature continuous reel soft pack trademarks is needed to be solved urgently. Multi-feature continuous reel soft pack trademark set printing color clarity, color graded accuracy, trademarks pattern and text position accuracy in one. Disposable multi-point high-precision positioning technology, flat local heat transfer technology and digital intermittent control technology are used to achieve continuous reel trademarks high-precision double location synchronization hot stamping. That is, multiple convex word and laser holographic anti-counterfeit pattern intermittent synchronization hot stamping. Machine vision inspection system scan each pixel of trademark with high-speed CCD array and collect it into a computer database for comparison with the standard sample. The defects are recorded by electronic coordinates, building electron stripping system and removing unqualified trademarks, a set of production process system of new continuous reel soft pack trademarks is achieved. This research provides a theoretical basis for technological transformation of enterprises and products the new packaging production, completes its corresponding transformation and crafts integration. It could help enterprise form a new production process system.
Simulation Analysis of the Impact on Gasoline Engine Power Performance by Optimizing the Structure of Intake Ports
Authors: Chen Hai Bo , Zhang Shuo , Huang Hai Zhen , Yuan Zhao Cheng
Published: September 2013

The performance of internal combustion (IC) engine is influenced by the characteristic of the intake process. The intake process of is very complex because the pressure waves transmission and reflection lead to pulsation and resonance in the pipes. The intake quality is directly related to the structure size of intake ports. The objective of this study is to use a one-dimensional simulation methodology to optimize the intake ports structure of a four-cylinder gasoline engine equipped with turbocharger and intercooler. Steady-state simulation was performed and the results were verified by the experiment data. The impact of the structure size of intake ports on power performance was identified and analyzed. The length of intake ports influences the pressure wave in the intake ports, and then the volumetric efficiency was impacted. The length of the intake port is inversely proportional to the resonance frequency, which means the longer the pipe is, the smaller the resonance frequency is, and then the lower engine velocity the resonance point moves to. This analytical methodology has significant advantages and can be applied to optimize the structure and the performance of the engine.
Research on Calculation Method for Polar Moment of Inertia of Spline Shaft
Authors: Chai Xi Jun , Wang Bao Min , Sun Ke , Chen Chang Biao
Published: September 2013

This article is based on the concept and the calculation method of polar moment of inertia to derive the calculation formula for polar moment of inertia of rectangle spline shaft and involute spline shaft. Then verified the correctness of the calculation method and laid the foundation for the strength calculation of spline shaft.
The Dynamic Analyses of the Eccentric Cylinder Moving on the Inclined Plane
Authors: Wei Juan , Shi Wen Pu
Published: September 2013

The conservation principle of energy and the mass center movement theorem of rigid body and the moment of momentum theorem relative to the center of mass were used to study the dynamic problems of the eccentric cylinder on the inclined plane. The mass center velocity and the acceleration of the cylinder and the normal pressure and the friction force of the cylinder acting on the inclined plane and etc are given. An example is introduced to show the variations of the physical variants, and the numerical results agree with the theoretical analyses.
Tabu Search-Based Formation of Reconfigurable Manufacturing Cells
Authors: Du Jing Jun , Wang Guo Xin , Yan Yan , Sang Qian
Published: September 2013

In order to make manufacturing system to adapt to the rapidly changing global market environment, Reconfigurable Manufacturing Cells (RMCs) based on balanced distribution of machines function were presented. Firstly, Similarity Coefficient Method (SCM) was used to cluster some parts to form part families which are the foundation of RMC. Then, a mathematical optimization model was set based on the workshop layout whose functional characteristics are balanced distribution. Tabu Search (TS) algorithm was designed to solve the selection problem of process routes. In the algorithm, a recycled search method was used to generate an initial feasible solution, and then the method of swapping adjacent elements was used to generate neighborhoods. Finally, software MATLAB was used to realize the algorithm, and a case study of simulation was used to verify the feasibility and effectiveness of the algorithm.
Dynamic Adjustment Method of Mechanical Press Slide Height Based on Linear Encoder
Authors: Pan Xiao Bin , Shu Xiao Mo , Li Guo Ping
Published: September 2013

It is very important to control mechanical press slide height precisely when it works because it will lead to loss of stamping accuracy while the slide height error appears. The paper designed a novel controlling device based on linear encoder to adjust slide height dynamically. Equipped with high-precision linear encoder on the mechanical press slide, the height of slide measured by micro-controller real-timely, the device drives the controlling motor to adjust the position of slider if slide height error occurs.
The Static Analysis of the Parallel Bars of the Crankshaft of a Mini Air Compressor on ANSYS
Authors: Wei Yao Bing , Qu Zhen Zhen
Published: September 2013

Mechanical model of crankshaft and connecting rod mechanism of reciprocating compressor was built. Then the order of stress was obtained every ten degrees while crankshaft turning. The larger stress of crankshaft initial turnings was utilized to calculate the whole model and the unreliable region and destructive working condition then was determined. The situation was simulated with ANALYS and the static characteristics, i.e. stress and strain, of the crankshaft was also obtained. The simulated results testify the analysis and the results of the paper have great value for reference when designing crankshafts.
Study on Dynamics Characteristics of SINS Damping System in Shock Environment
Authors: Tang Xia Qing , Gao Jun Qiang , Guo Li Bin , Zhang Huan
Published: September 2013

Dynamics characteristics of SINS damping system in shock environment were analyzed by finite element method, as the deformation of dampers may leads to the accuracy loss of SINS. In addition, the influence of absorber stiffness and damping coefficient on dynamics characteristics were studied. The results indicate that the decoupling of vibrations is significant for the accuracy of SINS. However, considering the almost impossible of completely decoupled vibrations, its necessary to carry out an optimal design of the absorber stiffness and damping coefficient to maintain the accuracy of SINS while meeting the requirement of vibration isolation.
Study on Torsion Vibration of Ship’s Complex Shaf
Authors: Liu Gang
Published: September 2013

The method of transfer matrices used for torsion vibration of ships complex shafts was analyzed, and various simplified models of transfer matrices were obtained by building a hybrid model for lumped parameter elements and distributed parameter elements. Based on the above, verified by an example of a complex shaft with one propeller driven by two turbines, the method of simplifying model was provided by analyzing the calculation results on the different simplified models.
The Modal Analysis with Finite Element Method for the Cutting Arm of EBZ160 Roadheader
Authors: Dong Zhi Feng , Wang Tian Hao , Liu Jie , Huang Jian Nong , Fang Li Yu
Published: September 2013

Cutting arm was the key assembly of the roadheader. Since complex force condition, violent and irregular vibration, the parts of the cutting arm assembly acted with each other, which led to the surfaces wear and damage of the parts. The finite element software ANSYS was used to calculate the vibration modes of the six parts and the assembly of the cutting arm. The maximum amplitudes whose maximum order was five were got by modal analysis. According to the calculation result, it was found that the vibration frequency of internal expansion tube and external expansion tube was close in each order and analyzed the reason for their serious wear.
A Constant Tension Control Device of Mechanical Feedback
Authors: Wei Ze Ding , Xu Han Chao , Su Hui
Published: September 2013

A constant tension control device of mechanical feedback is designed for the tension adjustment between the unwinding and rewinding of the flexible material, and the structure and size of the device are given. According to torque balance principle and based on purely mechanical structure, this device can control tension by adjusting the frictional force between the brake block and the unwinding wheel. The tension of controlling the unwinding and rewinding of the flexible material is analyzed, and then the control method of the tension is illustrated. Compared with the common closed loop control devices with tension feedback, the structure of the proposed device is simpler, and it has a stronger capacity of resisting disturbance in complicated electromagnetic environment.
Analysis on Torsional Stresses in Turbo-Generator Shafts due to Two-Phase Short-Circuit Fault
Authors: Gu Yu Jiong , Xu Jing
Published: September 2013

Taking a 660MW turbine generator shaft system as a target system, the torsional stresses responses are calculated under two-phase short-circuit fault by the finite element (FE) method which can obtain torsional stresses in local areas accurately. The results show that torsional stresses threaten the safety of shafts appear at the first several cycles of the vibration. And the amplitude of stress in weak cross sections located between the low pressure cylinder and the generator is much greater. In addition, the proportion of torsional stresses frequency components in different sections is distinct. The results are helpful to improve the safety management level of the unit.
A Quasi-Green Function Method for Free Vibration of Clamped Orthotropic Parallelogram Thin Plates on Winkler Foundation
Authors: Li Shan Qing , Yuan Hong
Published: September 2013

The quasi-Green function method (QGFM) is applied to solve the free vibration of clamped orthotropic thin plates with parallelogram boundary shape on Winkler foundation. Firstly the model governing differential equation of the problem is reduced to the boundary value problem of the biharmonic operator, and then it is reduced to the Fredholm integral equation of the second kind by Greens formula. A quasi-Green function is established by using the fundamental solution and the boundary equation of the problem. This function satisfies the homogeneous boundary condition of the problem. The singularity of the kernel of the integral equation is overcome by choosing a suitable form of the normalized boundary equation. The comparison with ANSYS finite element solution shows a good agreement. The proposed method is a novel and effective mathematical one.
Prediction and Control of 32m Z-Propeller Tug Cabins Vibration and Noise
Authors: Fang Jun , Wen Hua Bing , Liu Zhen Zhen , Dong Jian Min
Published: September 2013

Based on statistical energy analysis method, the 32m z-propeller tug model was built by VA One software. The numerical simulation research of vibration and noise of 32m z-propeller tug cabin was carried out by VA One. In order to prove the numerical simulation validity, the simulation data was compared with that of the experiments, which shows that the vibration prediction error is lower than 15% and the noise prediction error is about 5 dB(A). Whats more, schemes of cabin noise reduction and the power plant vibration isolation were designed to make the vibration and noise levels meet the IMO and GB5980-2000 standards requirements. The sound absorption material was pasted on the bulkhead of cabins, and the average noise reduction level achieved to 7 dB(A). Then, the single-layer vibration isolation system was designed for the diesel engines, the average noise reduction level achieved to 5 dB(A). The simulations have some guiding values on the control of tug cabins vibration and noise.
Research of Piezoelectric Cantilever Beam Diaphragm Pump
Authors: Cai Hao , Wang Liang Liang , Dong Jing Shi , Yang Yang , Lin Feng
Published: September 2013

The design in this paper is a rectangular piezoelectric vibrator driven Cantilever Beam Diaphragm Pump. By analyzing the working principle and characteristics of the piezoelectric cantilever beam pump, we developed the dynamics model and FEA model of the piezoelectric cantilever beam and optimized through tests the main factors that affect the output flow of the piezoelectric cantilever pump. Additionally, we designed the piezoelectric cantilever pump prototype, and by using an impedance analyzer, we measured the resonance frequencies of cantilever beams of different lengths; and we used the laser micrometer to test and measure the beams of different structures under loaded and unloaded condition. The maximum displacement of the output terminal of loaded cantilever beam is 50.5μm. Furthermore, through the experiments we tested the output flow and its corresponding variation under different diameters of transmission pistons and different excitation frequencies. Experimental tests show: when selecting the cantilever beam and the drive piston with optimal performance with the input voltage at 120V, and the frequency at 197Hz, the optimum output flow rate is 89ml/min.
Research and Utilization of Downhole Dynamic Corrosion Test Device
Authors: Gao Fei , Li Fang Peng , Wu Qiong , Jiang Mei Ting
Published: September 2013

With the lengthen of the production time continuously, and the adjustment and implementation of development programs constantly, the situation of Jiangsu Oil field well casing will become worse, even damaged gradually, while corrosion is one of the main factors to cause casing leakage in Jiangsu Oil field. In order to study the corrosion mechanism and influencing factors, we developed downhole dynamic simulation experiment device. The device is mainly composed of the recycle loop system, temperature control system, pressure control system, the main riser, and the buffer vessel. It implements the control of factors impact on the oil casing corrosion such as temperature, partial pressure, flow rate etc and helps us study the corrosion behavior of downhole tubing and casing. The results of weightlessness and electron microscope scanning show that the flow velocity and flow pattern is the main factors of maximum casing corrosion near the oil pump suction rate, and the local corrosion by CO2 is given priority to, this is consistent with the situation of field casing corrosion. It also shows that this experimental device has the advantages of reasonable structure, stable and reliable performance, easy operation, strong simulation and practicality.
Bearing Looseness Fault Characteristics Analysis of Rotor System Based on Incremental Harmonic Balance Method
Authors: Xiong Guo Liang , Xiang Qin , Cao Qing Song
Published: September 2013

Support or pedestal looseness fault exists in mechanical system typically.A new dynamical model of an eccentric motor rotor system with a piecewise-linear stiffness was proposed, and the incremental harmonic balance method was employed to obtain analytic solutions of the model. Then, the time domain waveform and amplitude spectrogram were achieved by applying the analytic solutions to program and iterate in the MATLAB software. Finally, the characteristics of looseness was analyzed. Results show that this research method is feasible, and this paper may provide a theoretical basis for the solution of complex bearing looseness model analytically and the diagnosis of its fault.
Dynamic Error Modeling Research of On-Machine Measurement System Based on Bayesian Network
Authors: Yan Li Wen , He Qi Bao
Published: September 2013

Production rhythm speeding up, requiring the on-machine measurement quick and accurate, however, the measurement speed is increased along with the increase of dynamic error, so the study of dynamic error about on-machine measurement system is particularly important. This paper introduced Bayesian network to the study of dynamic error modeling about on-machine measurement system, effectively expressed the relationship between the error sources and the dynamic error, and verified the feasibility of this method.
LOS Stabilization and Gyro Configuration Analysis for Roll-Pitch Seeker
Authors: Liu Hui , Zhu Ming Chao , Liu Bo , Jia Hong Guang
Published: September 2013

Roll-pitch seeker is currently applied in particular missiles, especially in air to air missiles. A representation of the seeker gimbal forward kinematics is analysed for the roll-pitch seeker based on the product-of-exponentials (POE) formula. And by transforming the inertial angular rate into the line-of-sight (LOS) coordinate system with the aid of recursive angular velocity equations, the LOS stabilization equation is obtained, then various schemes of gyroscope configuration and control are put forward based on the gyro direct stabilization. The research provides theoretical basis for the LOS stabilization control to isolate the LOS from the disturbance and vibration of carrier.
Finite Element Analysis of Assembly Body of Conical Pick
Authors: Pu Xin Zheng
Published: September 2013

In order to improve the structure mechanics performance of assembly body of conical pick, the finite element method was taken to analyse assembly body of conical pick based on rock cutting theory, and the distortion law of stress and displacement of carbide tip, pick arbor and pick holder were obtained. The results show that the maximum stress appearing in pick carbide tip and its weld site is 371MPa, maximum stress of pick holder appearing in its weld site is 157MPa. Consequently, the quality of the weld should be ensured in processing and manufacturing or welding installation to reduce the performance of carbide tip and pick holder drop. The maximum displacement of assembly body of conical pick is 1.14mm, which has little influence on the structure mechanics performance of assembly body. The research results could provide some guidance for designing, manufacturing or welding the assembly body of conical pick.
Modal Analysis and Optimization of Tricycle Vehicles Frame Structure
Authors: Xu Hai Hua , Wan Chang Dong
Published: September 2013

Frame is the most important carrying structure for tricycle vehicles. A reasonable frame design can increase its service life and reliability. Firstly, the frame structural modal frequency should avoid close proximity of excitation values. The structural modal characteristics were analyzed and validated; secondly, the method of size optimization was applied to improve the structure modal characteristics while taking into account the sensitivities analysis, at last, the thickness of steel plate was optimized to achieve lightweight and increase unreasonable natural frequency. According to the results of recomputation, the structure characteristics had been ameliorated obviously, and structures weight was reduced.