bluuebunny/crossref_metadata_2025 huggingface dataset:
The Optimization Design of Wind Turbine Gearbox Based on Improved Genetic Algorithm and Feasibility Analysis
Authors: Tian Ji Ming , Tan Xin
Published: February 2014

The design of the gearbox must ensure the simplest structure and the lightest weight under the premise of meeting the reliability and life expectancy. According to the requirement of wind turbine, an improved method combined dynamic penalty function with pseudo-parallel genetic algorithm is used to optimize gearbox. It takes the minimum volumes as object functions. It is showed that the ability to search the global optimal solution of improved genetic algorithm and less number of iterations. The global optimal solution is worked out quickly. The size parameters are optimized, as much as the driving stability and efficiency. To verify the feasibility of improved genetic algorithm, ring gear of the gearbox is analyzed. Static strength analysis shows that the optimization method is reasonable and effective.
The Application of DPSO - BP Neural Network in GIS Partial Discharge Typical Defects Recognition
Authors: Liu Ze Kun , Yu Hong , Guo Tie Qiao , Xu Cheng Long , Cheng Zhi Wan
Published: February 2014

The BP neural network is a classifier commonly used in partial discharge type recognition, but the traditional BP algorithm with defects cannot satisfy the actual need. So the optimization algorithm of BP network was studied intensively. DPSO algorithm was used for optimizing the network, and DPSO-BP algorithm is applied to analyze typical defects of GIS, which can be identified by the types of partial discharge. Compared with traditional BP algorithm, DPSO-BP algorithm occupied obvious advantage in recognition effect. It has improved the learning speed of the algorithm, effectively avoid network training going into local minimum point, and maintain the generalization ability and fault tolerance of BP neural network at the same time.
Reverse Design from Virtual Manufacturing
Authors: Wang Song Hao , Vu Dinh Quang , Wu Guang Guo , Tran Van Manh
Published: February 2014

The aim of this paper is to present the advantages and the vision of Reverse Design from virtual manufacturing. With the reverse design method, the real geometry after manufacturing process (by simulation) was predicted. In the first part of the study, comparisons were made between difference cases (the injection position and the amount of the pin gates). Based on the results from simulation, it is clear that 4 pin gates are better choice. In the second part, under the 4 pin gates working condition, considering the warp from the injection molding process, the actual minimum gap between the fan and the frame after assembly is smaller than the original designed gap. Therefore, to get the ideal product to keep the designed gap between the fan the frame, the radius of the fan should be reduced or the radius of the frame should be increased. While in other case, which was simulated with 3 pin gates, the real gap is larger than the original gap. Therefore, to get the ideal product, the radius of the fan should be increased or the radius of the frame should be reduced. In conclusion, original designed parameters could be modified, with the help of virtual manufacturing (by simulation) to make the assembly more accurately efficiently.
Robotic Additive Manufacturing System of GMAW Constrained by Electromagnetism
Authors: Meng Fan Jun , Ba De Ma , Yin Feng Liang , Du Jun
Published: February 2014

A robotic additive manufacturing system of GMAW constrained by electromagnetism has been developed recently. In this paper, the work principle, functions and composition of this system are introduced. A metal part to be manufactured should be constructured three-dimension CAD model firstly, then the delamination process of three-dimension model is carried out. Furthermore, the forming path planning of additive manufacturing is performed and finally the part is fabricated layer-by-layer in virtue of GMAW process. The additive manufacturing system consists of the robot system, GMAW power, a device producing magnetic field, a linear laser system monitoring precision of the forming part, a digital measuring device monitoring forming temperature,central control system and software modules that support various functions. The functions of the additive manufacturing system comprise CAD model construction of parts, discretization of three-dimension model, forming path planning and GMAW deposition forming layer-by-layer, and etc. It is indicated that the exploitation of the additive manufacturing system will provide an effective way for the manufacturing of metal parts.
The Design of the Quadruped Robot
Authors: Shi Jun Rui
Published: February 2014

Through summarizing the quadruped walking style design quadruped robot, obtained using DH method analysis of the mechanism kinematics principle, designed for the continuity of the gait, and to add the 3 d model of constraint into ADAMS to verify, through the analysis of the displacement of the center of mass, joint torque, verify the rationality of the gait planning and meet the requirements for the selected motor.
Ct-SELECTOR: A Web Application for Cutting-Tool Selection in a CNC Machining Workshop
Authors: Sun Pei Lu , Jiang Ping Yu , Chen Bao Quan , Zhang Lei
Published: February 2014

Recently in most Chinese CNC machining enterprises, the selection of cutting tools still depends on the experience of individual workers, which is hard to be inherited by others. Faced with this situation, we developed a web application for selecting proper cutting tools in CNC machining workshop, named ct-SELECTOR for short. This article introduces the main functions of the ct-SELECTOR and analyzed the three key enable technologies for realizing each function: (1) the automatic cutting-tool selection and match, (2) the optimal recommendation and management of metal cutting parameters and (3) the management and off-line prediction of tool-life. Finally, the developing architecture of the ct-SELECTOR is demonstrated, and a running example is illustrated to verify the validity and practicability of this system.
A Similarity Measure of Schedules and Robustness Evaluation of Priority Rules
Authors: Matsuura Haruki , Asada Akiko , Sato Yu Ya
Published: February 2014

The present paper attempts to clarify which priority rule is appropriate for specific manufacturing environment variations, such as processing time variations, operation additions, and additional job releases. In such manufacturing environments, the performance of scheduling rules should be evaluated with a degree of robustness under dynamic situations and traditional measures, such as makespan, under static situations. The present paper evaluates the robustness of the priority rules FCFS, SPT, MOPNR, and MWKR from the viewpoint of both dynamic and static situations based on the similarity of schedules before and after variations and based on the rate of makespan deterioration. A new measure of the similarity of schedules is proposed. Guidelines for selecting priority rules, such as avoiding rules that directly use the uncertain information in calculating the priorities, are provided.
An Obstacle Avoidance Algorithm for Path Planning Based on Inspection MBD Model
Authors: Liu Zhen Yu , Fang Yi Xiang , Liu En Fu , Huang Feng Shan , Jin Jiang Yan , Zhao Jin Cai
Published: February 2014

Aiming at measuring path planning, based on inspection MBD (Model Based Definition) models of the measured parts, size and position information of the parts features are generated. Global coordinate equations of the features are established. In measuring process, probe heads should move along the outer normal vector, and the path should be the shortest. Under these constraint condictons, the obstacle avoidance path are created between the probe head starting points and the inspected features origin points. Finally, an example is given to verify the algorithm, which offers a base for the whole path planning considering the change of the probe heads and their direction.
Building Self-Service Printing System on College Educational Administration
Authors: Shi Chun Fang
Published: February 2014

Printing system of college educational administration has been managed by artificial, which result in low efficiency and high human cost. So we build a system by docking the software and hardware system of background database based on IC card to realize self-service printing for teachers and students of college, which provide a high-efficiency, convenient and humanized service mode, and enhane the economical sense of teachers and students for creating a green campus.
A Heuristic Peephole Diversifier for Software Security
Authors: Chen Rong Zheng
Published: February 2014

A heuristic peephole diversifier was based on the technique of complier optimization. It took user input binary sequence to generate multiple copies of sequences that functional equal to the original one but longer or complexity. The diversifier analyzed the disassembly code from binary, sliced them into blocks to construct the data-flow as heuristic information to guide the instruction selection phase from the table that built from some sample programs. Such method could effectively resist the binary differences analysis attack, increase the difficulty against cracking.
An Approach to Developing Information System for the Small and Medium Companies
Authors: Jang Kyung Hoon , Park Jae Il
Published: February 2014

In reality, when a small to medium size company adopts ERP system based on customized MES designed to run resource operation of large corporations, problems associated with use and maintenance frequently arise and, in many cases, its effectiveness and performance against investment are not clearly revealed. In order to prevent this problem, it is necessary to take a step by step approach when introducing information system in small to medium size companies and clearly understand the implementation process. This research proposes how to develop information system for small to medium size companies that can effectively collect and analyze data taking into account their business environment and human resources constraint.
Research on Development Mode of E-Commerce Based on Cloud Computing
Authors: Huang Le Hui , Zhang Xiang Qing
Published: February 2014

Cloud computing is a revolution of the information industry operation mode, and has profound effect on development pattern of e-commerce. The paper describes the development opportunities of e-commerce brought by cloud computing, and development mode based on cloud computing.
Finite Element Analysis and Multi-Objective Optimization of the Precision Horizontal Machining Center Bed
Authors: Li Xue Yan , Niu Wen Tie , Wang Jun Qiang , Xue Ling Jun
Published: February 2014

In order to improve dynamic and static performance of the precision horizontal machining center, the method of multi-objective optimization based on the response surface model was applied for optimizing design of the bed structure. The design variables were the layout parameters of the rib plates. Sample points were obtained by the Box-Behnken design experiment, and responses of sample points were analyzed by SAMCEF. The maximum deformation of guide rails and the low-order natural frequency were extracted to fit the response surface model by least square method. The layout parameters of the rib plates were optimized through the application of multi-objective genetic algorithms. Then, relationship between the lightening holes and the performance were analyzed to determine the suitable diameter. The results verify the validity of the optimization method, and the paper provides methodological guidance for optimization of machine tool structural parts.
Mobi-POSP: A Web-Based Mobile Producing and Outsourcing Service Platform for Industrial Equipment Manufacturing
Authors: Liu Chao , Leng Jie Wu , Ding Kai , Zhang Chao Yang , Cao Wei , Jiang Ping Yu
Published: February 2014

As producing and outsourcing services (POS) are appearing to be increasingly explosive nowadays in manufacturing industry, an efficient technology is needed immediately to manage the POS relationships, create manufacturing orders and integrate the distributed social manufacturing resources. Therefore, a web-based mobile producing and outsourcing service platform (mobi-POSP) for industrial equipment manufacturing is built up and proposed in this paper. Its running principles, designed functions and some key enabling technologies are talked in detail. Finally, four truly cases run in the prototype mobi-POSP to show its feasibility and applicability.
The Method of Web Image Annotation Classification Automatic
Authors: Zheng Xin , Cai Ai Ping
Published: February 2014

It has been heavy work that to find the related pictures form Internet without annotation. Therefore, the automatic image annotation was extremely important in image retrieval. The traditional method were translated image visual feature into keywords simply, but it ignored the image similarity problem between the low-level visual features and high-level semantic. That is image "gap" problem, so image annotation was very lower. This paper puts forward a classification of web based image content automatic tagging mixing technology, the first it will map visual feature of image to one or more rough images, then we will preprocess the web page text information, finally we select some keywords similarity as image annotation by using similar semantic processing module. So it realizes the image and text combining the automatic annotation and it achieve high precision of image annotation.
Dynamic Response of Thin-Walled Structures to Thermal Loadings and Random Acoustic Excitations
Authors: Zhao Feng Tong , Sha Yun Dong , Luan Xiao Chi , Zhu Lin
Published: February 2014

Hypersonic aircrafts are facing increasingly severe aerodynamic heating, noise and so on, which will lead to nonlinear vibration characteristics for thin-walled structures of hypersonic aircrafts. Considering the influence of thermo-acoustic loadings, finite element formulation of simply supported plate under combined thermo-acoustic loadings are founded, and vibration characteristics of simply supported plate under thermal loadings with temperature gradient and random acoustic loadings are investigated. According to finite element numerical method, modal frequencies, critical thermal buckling temperature difference, dynamic stress response of simply supported plates with temperature gradient under combined thermo-acoustic loadings were calculated before and after thermal buckling. The results show that three types of motion: random vibrations around initial equilibrium position in pre-buckling region, snap-through oscillations between two post-buckling equilibrium positions, nonlinear vibrations around one of the two post-buckling equilibrium position, and The RMS of nodes for different locations of the simply plate are obtained in pre-buckling post-buckling region, and it is shown that different interaction of tensile bend stress, compressive stress and compressive thermal stress lead to different RMS trends.
FEA and Contrast Test of Slender Shaft Turning
Authors: Wang Tie Ling , Xi Zhao Xia
Published: February 2014

Aanalyzed the finite element static characteristics of the slender shaft deformation under the influence of cutting forces with different clamping ways in turning process by Pro/ENGINEER and Pro/MECHANICA software . Also analyzed the influence of clamping ways on the natural frequency of the slender shaft modal characteristics. The result indicates that the static analysis can be applied to the prediction of processing deformation with different clamping ways, the modal analysis can be applied to the calculation of the slender shaft natural frequency with different clamping ways. Can get a basic for reducing machining deformation and vibration, selecting cutting parameters, drawing up technological scheme reasonably.
Numerical Simulation on Effect of Shield Tunnel Construction on Pipelines with 45* Skew Angle and Tunnel
Authors: Guo Dong Liang , Zhao De Shen
Published: February 2014

Shield tunnel construction cause soil movement to harm the adjacent underground pipelines. This paper, taking Dalian Spring Street subway station as the background, uses the finite difference software to establish 3-D finite element analysis model to simulate the deformation of pipeline with 45* skew angle in the tunnel construction work. The results show: when the left tunnel push towards pipelines, due to the skew of the pipeline and tunnel, vertical displacement of pipelines is a certain shift to the left. When the right tunnel excavation is complete, the pipeline maximum settlement has a return to the center of the two tunnels. The settlement of pipeline is much bigger than horizontal displacement.
Experimental Study on Earthquake-Damaged RC Frame Columns Repaired with Sprayed Basalt FRP
Authors: Getahune M. Bitewlgn , Gu Qian , Li Bo , Sun Cheng Fang
Published: February 2014

Repairing of past earthquake-damaged members that are highly susceptible to future attack is necessary to prevent civil infrastructure destruction and consequent lives lose.Sprayed basalt FRP composite was tested and presented here as a promising solution.In this study, three 1/2 scaled reinforced concrete frame columns were used to investigate the effectiveness and feasibility.One column was damaged to failure and used as a reference specimen.The other two columns were damaged up to the yielding of main bars simulating deterioration of the structure due to seismic action to a control level.These two columns were repaired with sprayed basalt fiber reinforced polymer (BFPR) composite.Different thicknesses of sprayed BFRP composite were applied.Each specimen was subjected to lateral low-frequency cyclic loading and simultaneous constant axial load to simulate seismic action and dead load respectively.The test result analysis showed that sprayed BFRP can increase the load carrying capacity, enhance the energy absorption capacity, and can effectively restore the strength of past earthquakedamaged RC column.
Calculation of Crack Width of Steel-Concrete Composite Beam Prestressed with Internal Tendons
Authors: Jiang Shuan , Bai Li Li , Xue Wei Chen
Published: February 2014

Steel-concrete composite beam prestressed with internal tendons (SCCPIT) is composed of prestressed concrete slab, steel beam and shear connectors, etc. At present, there is no calculation formula for crack width of SCCPIT in current design codes like European standard Eurocode 4 or American code ASSHTO LERD Bridge Design Specification (2004). In this paper, calculation formulas for crack width of nonprestressed steel-concrete composite beam provided in Code for Design of SteelConcrete Composite Structure (DL/T 50851999) were adopted as a basis for modification. On the basis of available test results, calculation formulas for uneven coefficient of reinforcement strain and average crack space were modified by consideration of concrete slab width and combined force ratio. Hence, empirical calculation formulas for crack width of SCCPIT under negative moment were proposed. In order to verify accuracy of proposed formulas, available test results including results of five simply supported SCCPITs previously conducted by author were introduced, and comparisons indicated that calculated values were in good agreement with test results.
Experimental Study on Tensile and Shear Behaviors of the Channel Type Embedded Parts in Concrete Beam
Authors: Tan Qian , Li Ying Min , Jia Chuan Guo
Published: February 2014

With the development of curtain wall in super high-rise buildings which promoting the application of embedded part. In this paper, the experimental research on the tensile, shear properties of a kind of channel type embedded part which has been disposed through a hot extrusion forming new technology. The mechanical properties, deformation and damage form of embedded parts were investigated.Experimental results indicate that it has good mechanical properties and favorable deformation performance under tensile and shear loads in normal work. Under effect of tension, the circular anchor nail was pulled-off from channel and the bottom junction between square anchor nail and channel was tore were the main failure forms. Otherwise, when under the effect of shear, the bolts were sheared fracture. The results of experiment could provide experimental basis for channel embedded part with wide application in engineering.
Research on Conceptual Design of Product Service System Oriented on CNC Machine Tools
Authors: Fan Hua Tao , Sheng Zhong Qi
Published: February 2014

Researched the conceptual design of product service system (PSS) oriented on CNC machine tools. Centered on acquisition and analysis of the customers need, and its transmission and distribution to PSS project characteristics of CNC machine tool, the paper proposed an integration method of QFD and TRIZ to help the designer to develop PSS solutions to meet the customers need. This study established a new design system and methodology for PSS conceptual design, which built a theoretical foundation for the further research in this field, and also provided technical support for transmission and distribution of the customers need, configuration design and PSS project decision-making. This method was applied in a PSS case of CNC machine tool to test its effectiveness.
Modal Analysis of Concrete Pump Truck Boom
Authors: Mao Kun Li
Published: February 2014

Boom is one of key components of concrete pump trucks which can be looked as a projecting beam when unfolded at pumping mode. Under different concrete pumping modes, vibration of boom is serious for the hydraulic cylinder switching over shock, which can lead to the early damage of boom structure. In the finite element analysis software, boom of 37 meters concrete pump truck is simulated for its modal. Natural frequencies and corresponding modes are got and analyzed. To reduce vibration of concrete pump trucks, advices are presented by finite element modal analysis.
Design of Car Vacuum Cleaner *
Authors: Jin Hong Yan , Zhu Zhi Wei
Published: February 2014

This paper introduces the purpose and significance of car vacuum cleaner design, the present situation and development trend of car vacuum cleaner and demonstrates the necessity of researching on the car vacuum cleaner. The significance is designing a beautiful appearance, convenient operation, full of emotion, and green car vacuum cleaner for the purpose of improving people's life quality.
Improvement in Design of Household Necessities Based on Classification Tree Model
Authors: Feng Yong Qin , Yin Yan , Zeng Ling Yun , Zhang Xiao Rui
Published: February 2014

With National Injury Surveillance System (NISS) as data source and 6,683 cases of injuries by household necessities in 2012 as study sample, the classification tree model was established to analyze the typical pattern of product injury of household necessities. The suggestions were put forward that the daily ceramics should be designed as per usage requirements to determine the structure style of modeling shape and the ratio scale, etc. The reverse engineering system should be incorporated into the design of daily plastics, glasses and daily groceries to pertinently improve the design of product components that may lead to injuries. Hand tools and hardware should be properly designed to avoid the possible product hazard and to reduce the risk of problem arising by means of additional special protection system.
Analysis of Material Management in the Construction Site
Authors: Li Ping
Published: February 2014

The preparation and management of the construction process of the pre-construction analysis, pointing out the site materials management throughout the construction process is an important part of a direct impact on the progress and quality.
Application of Production Site Management in Project of Improving Cutting Bed Productivity
Authors: Chen Wei Wei , Chen Yan
Published: February 2014

Production site management, which uses of scientific management principles, management methods and management means to make reasonable configuration and optimization of various factors of production factors on site, ensures the smooth realization of production targets. The paper analyses the problems existed in the cutting workshop, and discusses the application of production site management in the project of improving cutting bed productivity in the following aspects, definition stage, measurement stage, analysis stage, and implement stage.
Power Machinery Maintenance Process and its Economic Analysis
Authors: Jung Moonho , Park Jae Il
Published: February 2014

In this study, an analysis is made of facility maintenance process and its modeling for economic analysis. Especially, we are looking after the modeling method for estimating its cost through input data based on facility information. This allows biding for some plant operating and maintenance orders through results of cost estimation and economic analysis. Thus, we can make proper cost sheet of plant operation and maintenance through systematic cost assessment, reliable operation and maintenance related projects in the bid through management. Furthermore, we are going to conduct a case study to apply the above mentioned model.
A Genetic Algorithm to Determine Production Schedule in an Imperfect Manufacturing System with Time-Vary Unit Cost
Authors: Ouyang Bing Chang , Lin Yi Chen
Published: February 2014

Considering time-vary in unit cost and imperfect quality in process, this study presents a genetic algorithm to deal with the production schedule and batch lot problem for a manufacturing system. Incorporating linearly and exponentially continuous unit production cost, we assume that defective items are reworked at a constant rate after regular production immediately. Not all of the defective items are reworked but a portion of them are scraped due to serious damage. Our objective is to minimize the expected value of total cost for this production system. A genetic algorithm with the chromosome of real number type to solve this problem is proposed. Standard GA operators are used to generate new populations. These populations are evaluated by a fitness function using the total cost of production scheme. An explicit procedure for obtaining an approximate solution is provided.
Economic Analysis for Steam-Driven Induced Draft Fans and Application Characteristics of Different Units
Authors: Xu Qi Sheng , Liu Gui Cai , Wu Jie , Ma Xiao Qian , Yu Yue Xi , Wang Zhao
Published: February 2014

Concerning the steam-driven induced draft fan renovation tendency in large coal-fired power plants, the economic analysis of steam-driven way is proposed. And based on the 600MW unit of different capacity, the application characteristics are analyzed. As the result, the economic benefit of 600MW subcritical, supercritical and ultra-supercritical units are 6.93×106, 5.14×106 and 3.81×106 RMB, respectively. The lower main steam parameters, the larger economic benefit.
Sound Pressure Distribution and Acoustic Parameters Estimation by Simulation
Authors: Zhou Xiang , Gao Yan , Shu Zi Jia
Published: February 2014

A study on the sound pressure distribution and related acoustic parameters estimation bymeans of the acoustics simulation software EASE is presented in this paper. By defining the sound-absorbing material, the types of sound source, the location of sound source, and the related factors, a more accurate model for the specified acoustic field distribution is obtained. It provides certain theory reference for the design of indoor electroacoustics, which saves the cost and time for the development of construction engineering.
Rational Analysis of Sewage Treatment
Authors: Liu Bao You , Liu Ya Ru
Published: February 2014

Sewage treatment problem is a typical linear programming problem, and can be solved by method of linear programming. In order to reflect the principle of fairness and make full use of self-purification capacity of environment, this paper gives rational analysis of the sewage disposal problems in 2007 Chinese Undergraduate Mathematical Modeling Contest. The mathematical model of linear programming is established, and solved by lingo optimization software. The results show that: by the principle of fairness, investment funds increased; by the principle of self-purification capacity of environment, investment funds decreased. The results can provide guidance for decision makers to choose different scheme.
Relation between Sulfate Reducing Bacterium and Environmental Factors in Petroleum Hydrocarbon-Contaminated Site
Authors: Lv Hang , Su Xiao Si , Zhang Yu Ling
Published: February 2014

The sulfate reducing bacterium (SRB) diversity of all samples were analyzed by PCR-DGGE technology and the Shannon-Wiener indexes (1.004-3.665) of all the samples were calculated. The results showed that the abundances, advantages and evenness of the sulfate-reducing bacterial community of all the samples showed certain change regularity along the pollution halo direction. The results of CCA analysis showed that the distribution and structure of sulfate reducing bacterium communities showed obvious correlation with the concentration of TPH, DO and other environmental factors.
The Applications of Neural Network Filter to Estimation of Oil Spoil in Sea
Authors: Tong Yu Ming , Xu Di Jian , Shi Jin Liang , Zeng Jian Kui
Published: February 2014

The oil spoil detection is an important problem in many applications such as oil exploration and transportation. But in some application such as sea, this task is very difficult because of the strong clutter. Many algorithms have been proposed for this problem. The Maximum Likelihood (ML) is one of those good solutions. This paper describes an application of neural network (NN) for obtaining the global optimal solution of finding oil spoil. It improves the estimation accuracy. The computation complexity is modest.
Green Campus Construction Based on the Environmental Factors Control
Authors: Luo Hong Sen
Published: February 2014

This article explores a new method of constructing green campus based on the control of environmental factors. This method includes recognition, evaluation, control the environmental factors and monitoring the execution of control. Continuous improvement of the campus environment is the aim of the method. This article also introduces the application of method in Chongqing University of Arts and Sciences. Practice has proven that the method of constructing green campus can realize the pollution prevention and resource conservation; the teachers' and students' environmental consciousness and skill could be improved. Constructing green campus through control environment factors is practicable.
Vertical Thermal Distribution at the near Dam Region of the Three Gorges Reservoir in the Initial Impoundment Period
Authors: Dai L.Q. , Dai H.C. , Wang B.W.
Published: February 2014

Water temperature plays a crucial role in water ecological environment both in the reservoir and downstream area. Three Gorges Project (TGP) is the largest hydraulic engineering in the world, and changes of water quality attract much more attention, especially in the thermal structure since initial impoundment in 2003. In order to clearly understand water temperature distribution after the initial impoundment in the Three Gorges Reservoir (TGR), we monitored the temperature distribution of the Taipingxi section which was not far from the dam from early April to the end of July in 2004. According to the analyzing of the monitoring data of transverse and vertical temperature variation, we could find that when water level went up to 135m above sea level (a.s.l.) or 139m in the initial impoundment phase, the temperature mixed uniformly in transverse direction. Excepting April, there was basically had no temperature difference in vertical direction, even in April, the maximum temperature difference was only 1.39°C within 100 meters (April 22), the average temperature gradient was only 0.014°C/m; Both the temperature of water and atmosphere have similar variation tendency, but the response of the water temperature to atmosphere is delayed, especially the bottom water temperature. The result indicate that the reservoir displayed a mixed thermal structure during initial impoundment phase, therefore, the release had no change before and after impoundment, also had little influence on the aquatic organism and crops at downstream , the work provide a scientific basis for the development of pollution control and ecological protection measure.
The Integration and Development of Heritage Resources Based on RMP Analysis - A Case Study of Songshan World Geopark
Authors: Sun Jian Hua
Published: February 2014

Songshan was inscribed in China's first batch of world Geoparks in 2004 with the approval of the UNESCO. And on the 34th World Heritage Conference in 2010, the Historic Monuments in The Centre of Heaven and Earth located in Songshan area was officially included in the World Heritage list. In response of these calls to preserve this world heritage which is rich in cultural resources and natural resources especially geological relics, the present paper offers a comprehensive yet integrated analysis from the world heritage perspective, based on RMP analysis and data obtained in the 2012 interview, with great emphasis laid on its market characteristics and tourism products. Such systematic analysis also provides solutions for the problems facing and even challenging tourism development and practical suggestions are also put forward for its sustainable development.
A Decision Model for Harvesting Eichhornia crassipes Once a Week
Authors: Sun Ling , Zhu Ze Sheng
Published: February 2014

We develop a week harvest model of Eichhornia crassipes where harvesters obtain information about harvest area once a week by using GPS data and satellite remote sensing images from growth experiment of Eichhornia crassipes. We show that a harvest amount of Eichhornia crassipes is positively correlated across growth rate and harvest strategy. This experiment was shown to lead to a determination of the model parameters with an overall Goodness of Fit Index of 0.9753 and a maximum sustainable area 14059 (square meter) once a week with total harvest area 154649. This indicates that there is a possibility of obtaining harvest area of Eichhornia crassipes once a week and suggests that it is possible to implement environmental phytoremediation with the harvest once a week at a maximum sustainable area.
The Application of MATLAB in Higher Vocational Engineering Mechanics Teaching
Authors: Huang Dong
Published: February 2014

Higher Vocational Education in engineering mechanics specific issues to illustrate the application of engineering mechanics MATLAB language teaching. Engineering mechanics for complex calculations and mapping problem, using MATLAB software programming to solve, to stimulate students interest in learning, greatly improving the learning efficiency, enhance students' ability to solve engineering problems.
Professional Course Reforms According North American University Teaching
Authors: Hu Ling Yan , Xin Yong , Zou Yan Ni , Li Chun Quan , Xu Shao Ping
Published: February 2014

At present, there is a big gap between education level of Chinese universities and that of North American universities, especially compare with US universities. The paper studied the key factors for the success of North American university education according the authors experience and analyzed the problems existing in Chinese university education. Taking the curriculum of Data Structure as an example, the paper developed a teaching reform scheme focusing on cultivating students abilities. Two years practical teaching results showed that the teaching reforms proposed in this paper can stimulated the students initiative to learn. The students were able to apply the theoretical knowledge to solve the practical problems. Accordingly teaching efficiency has been improved significantly.
The Construction of Excellent Course Website in University Based on Wordpress
Authors: Xie Yu Chan , Sheng Han Qin , Li Yu Chen , Feng Zu Bo
Published: February 2014

In order to strengthen the communication between students and teachers and improve the teaching effect.In this paper, a kind of excellent course website based on Wordpress was designed.Set up different levels user system by station group, by which the communications between each network module realized. Teacher can build their own page as substation administer.In this paper the key steps of the construction were descripting in detail. Experiments show: it is a reliable and effective website construction scheme with simple extention and maintenance.
Interdisciplinary Conceptual Cluster in Mathematics and Physics on the Basis of a Graph Model of Interdisciplinary Links
Authors: Gnitetskaya Tatyana N. , Ivanova Elena B.
Published: February 2014

This paper describes a method of forming an interdisciplinary conceptual cluster in mathematics and physics on the basis of a graph model of interdisciplinary links developed by T.N. Gnitetskaya. Interdisciplinary hyperspace for mathematics and physics courses for engineering majors according to the group of concepts was built. In the framework of the model, quantitative characteristics of interdisciplinary links were evaluated, using which a hierarchy of clusters content was established and the fundamental unit of concepts was emphasized. A quantitative meaning of "capacity" of an interdisciplinary conceptual cluster of mathematics and physics courses according to the group of concepts was achieved.
Oven Model Making
Authors: Huo Lin Tao , Wang Yong Li , Xie Xiu Wei , Zhang Xian Hui , Li Guo Peng
Published: February 2014

In order to promote combination on work and study, according to teaching requirements on "coke production technology", the teachers with teaching team at coal and chemical led the students with first class on teaching reforming on coal and chemical to carry on designing and making with coke oven model. Model making was a proven design method and integrated design process with profound meaning [. Model making practices was devoted into the teaching process, greatly stimulated the students enthusiasm, cultivated the career ability, social skills and methodical competence on students.Teaching effect is obvious [ .
The Application of Matrix Compression Algorithm in Network Education Platform for the User Security Authentication
Authors: Zheng Nong
Published: February 2014

Using the matrix compression algorithm in the network education platform for the user information security certification is a good way. The sensitive user information is transfer in an open channel and it can be authentication for using the matrix compression/decompression, matrix decomposition/reduction algorithm. The client conduct random capture and compression by the user information been divided into a number of rectangular block size, corresponding to generate a key and cipher text. The server take out the corresponding data from the data queue of receiving and to extract In accordance with the key rules, then to reduce of information in corresponding positions. Thus the user identity information can be authenticity and integrity verification.
Numerical Investigation on Coal-Fired Power Plant Flue Pipe with Ash Deposition
Authors: Pei Yu Feng , Yuan Guo Dong , Geng Ye , Yan Bei Bei , Long Zheng Wei , Yao Yu Fei , Zheng Le Yu
Published: February 2014

Large rectangular flue pipes installed in coal-fired power plants usually need inner supports to ensure their stability. The design and arrangement of inner supports in rectangular flue pipe before electrostatic precipitator have an impact on precipitators effectiveness and lifespan. Currently, there are two schemes used for setting inner supports in China. One is National Standard Specification (NSS) and the other is an American Combustion Engineering company design criterion (CE). No work has been done on the comparison of these two types of inner supports, especially with consideration of ash deposition. In this paper, the effect of ash deposition on pressure drop and velocity distribution in practical production are carried out, which are adopted flue pipes volume 1/8 and 1/16 as the ash layer. The numerical results show that the ash deposition volume have effect on pressure loss of the straight flue pipes. However, the effect depends on the inner supports type.
Finite Element Strength Analysis on 12V280 Diesel Engine Connecting Rod
Authors: Li Ming Hai , Ni Lei
Published: February 2014

Taking a certain type of diesel engine connecting rod as the research object and the finite element method as the main research means.This paper uses PROE software for solid modeling tool and ANSYS software for finite element analysis tool,Static analysis is carried out on the connecting rod. Analyze connecting rod under different conditions of stress distribution and dangerous parts. This paper provides the reliable basis for the design and improvement of connecting rod.
Research of Design Method in Light Bus Cab H Point
Authors: Zhou Rui , Luo Wei Dong , Li Ya Hui
Published: February 2014

Only one or a few individual template confirm corresponding pint in traditional light bus cab H point design, different bodies and special requirements arent considered. The regional function method which gets a contented region through many different design requirements can make the design much more flexible, convenient, and practical in the bus cab design. Regional function method is analyzed and used to reducing the shortages of traditional design method in this paper. Mathematical model and deeply analysis are made mainly about riding comfort, vision field and hard point to optimize bus cab H point. finally matlab is used to calculate H point through an application of a light bus.
Curve Form Design of Accelerated Loading Track
Authors: Guo Xing Yu , Zhang Peng , Feng Jin Xiang
Published: February 2014

The curve type track is used in designing of Accelerated Loading Test System (ALT). The loading vechicle is will produce a greater impact and noise when running on the curve of the track, which will reduce the efficiency and accuracy of the experiments. The design requirements, criteria and design methods of the rail curve are proposed. Contrast the centripetal force, the horizontal component force and the jerk of special curves, the final design chosed elliptic curve as curve type of ALT track.
Analysis of an Engine Front Baffle Fatigue Cracking
Authors: Liu Chun Jing , Liu Xin Ling , Zhao Kai
Published: February 2014

Front baffle cracking in low-cycle fatigue strength test was investigated. It is suggested that there was overheating running in the test by visual examination of baffle surface color and fracture surface color. It is obtained that the front baffle was cracked by fatigue mechanism by observation of fracture surface. It is confirmed that the temperature range of overheating was about 700~750°C by temperature and color test. It is shown that the value of hardness decreased heavily when temperature was above 700°C by hardness measurement of sample in temperature and color test, demonstrating the mechanical property decreased severely in the overheating temperature range. Finally, the root cause for the cracking of front baffle might be attributed to overheating running in the test.
Radial Deformation Analysis of Complex Parts with Centrifugal Force and Heat Effect
Authors: Yue Li Li , Liao Ping , Wang Peng , Wu Yue Song
Published: February 2014

A stream turbine bowed and twisted blade has been taken as an example for complex parts. Firstly, a simplified computing method for the blade with centrifugal effect is put forward. Then the finite element model of complex parts with centrifugal effect is established. Simulation results show that errors between calculation and simulation results are less than 15%, the simplified computing method has good application value. In addition, the impacts of centrifugal and heat on blade radial deformation are discussed by thermal structural coupling analysis. Numerical simulation results show that heat is the major factor that affects blade radial deformation.
Simulation and Analysis of Speed Accessory Based on DYNAFORM
Authors: Zhou Jun Rong , Peng Yi Hang , Hu Jian Peng
Published: February 2014

This paper study the object of the speed accessory and give the forming numerical simulation of its bending process based on software DYNAFORM. The simulation analysis the effects to its bending springback produced by four factors such as thickness of plate, die fillet, texture of material and the friction coefficient, and research on the factors affect the springback through the orthogonal experiment method, determine the impact factor of the four factors to the bending springback process and find the optimum technological parameters combination.
A Wing Structure Design Based on Topology Optimization
Authors: Tong Gang , Liu Tong Fei , Deng Yang Chen
Published: February 2014

Introduces the characteristics of topology optimization and bionics, proposes the steps and method of using MSC.Patran to establish the model of the wing structure topology optimization, and through to illustrate the feasibility of the method and the application value of the wing structure topology optimization and bionics design. Key words: topological optimization; wing structure; bionics design ;finite element; MSC Patran;MSC Nastran
The Study of the Effects of Refrigerant Fraction on Auto-Cascade Refrigeration System of Evaporation Temperature
Authors: Zheng Da Yu , Li Dan , Zheng Jia , Gao Li Ping , Zhang Yi Ming
Published: February 2014

Non-azeotropic auto-cascade refrigeration system utilizes various components of different boiling refrigerant to get low-temperature. With R22, R23 and R14 as a non-azeotropic refrigerant auto-cascade refrigeration cycle system. Through the experimental study of non-azeotropic refrigerant charging and the ratio between the amount of charge, to analyze the effect of these three refrigerants charging and relationship of the fraction on the whole refrigeration cycle refrigeration temperature. To improve overall non-azeotropic auto-cascade refrigeration systems working efficiency. So as to achieve the purpose of energy saving.
Modern Industrial Plant Electrical Grounding System Design and Installation
Authors: Zhu Li Juan , Gao Yan Ming
Published: February 2014

With the development of economy and society, there are more and more modern industrial workshop, electricity is the main energy of a modern industrial workshop. Ensure the safety of the power of the industrial building is a key consideration in the design of industrial distribution, and an important content of the healthy development of the industry. There are many problems in the current electrical system, these problems are associated with grounding system with large and small, so in the electrical system, grounding system installation process to ensure that the electrical use one of the main means of security. Modern workshop electrical grounding system is analyzed and the construction of all kinds of earthing measures should be taken.
Resistance Characteristics of Underwater Supercavity
Authors: Zhang De Xin , Liu Gang , Guo Jian Ming , Yang Wen Liang , Zhao Zhen Gui
Published: February 2014

This paper based on the Homogeneous equilibrium multiphase flow theory.By using FLUENT software the high-speed underwater projectile resistance characteristics were studied.Analyzed the influence of cavitator diameter and Cavitation number on drag reduction characteristics of the projectile,and compared with the empirical formula.The results showed that the larger the diameter of cavitation,the easier supercavitation natural formation,but the drag coefficient be greater.