bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Improvement of Thermal Insulation and Anti-Radiation Performances of Traditional Wooden Vernacular Dwellings of Tujia Minority in West Hunan
Authors: Zhe Li , Lei Shi
Published: September 2014

On the premise of protecting traditional styles of the dwellings, performances of thermal insulation and anti-radiation performances of traditional wooden dwellings of Tujia Minority in West Hunan and the interior thermal environment were improved through technological improvements in this paper. By improving wall construction technologies, thermal insulation boards and wooden planks were added to exterior walls of these dwellings. Furthermore, a two-layer air cavity formed and thus greatly improved thermal resistance of walls. Meanwhile, feasibility of improvement technologies proposed in this paper was validated by practical engineering tests and data detected before and after tests
The Red Electroluminescence of Iridium Complex at Different Concentrations and Host Materials
Authors: Zhang Wen Guan , Qin Lian , Zhao Sheng Min
Published: September 2014

Six devices based on tris [2-(benzo [b] thiophen-2-yl) pyridinato-C3,N] iridium Ir (btpy)3 at the different concentration (0.5, 2, 8 and 12 wt. %) and in three host materials (PVK blending with PBD, PVK and CBP) were fabricated by spin-casting technique. The PL emission of Ir (btpy)3 in solid film peaked at 594 nm. HOMO and LUMO energy levels were-5.08 and-2.67 eV. The EL peaks kept constant at 600 and 649 nm, and Commission International de L′Eclairage (CIE) coordinates were stable at (0.63, 0.36). With the increasing of doping concentration luminances were enhanced at the given voltage. Devices of host PVK blending with PBD exhibited much higher luminance than device in host PVK or CBP at the same concentration of 8 %. All devices exhibited strong red electrophosphorescence. The transport of electron and hole was balanced and energy transfer from the host to the guest complex was efficient. The characteristics of devices demonstrated that Ir (btpy)3 was an excellent red emitter suitable for OLEDs.
The Monitoring and Analysis of the Anti-Slide Pile’s Pile-Soil Interaction
Authors: Wang Nian Qin , Xue Yao Qiong , Cheng Xiao Yu , Wei Jing Rui
Published: September 2014

In the landslide disaster control and high slope strengthening engineering, anti-slide pile is one of trusted engineering measures, but cognition in aspect of forced state on the anti-slide pile, the pile-soil mechanism etc, which should be strengthened. Therefore, monitoring objects with three cantilever anti-slide pile entities in the loess high slope somewhere, burying monitoring instruments such as earth pressure cells and steel bar meter, for as long as 18 months of monitoring. Through analysis of monitoring results, can draw the following conclusion:①The soil pressure distribution form before the anti-slide piles is parabola-shape as a whole, whatever above the slip surface or under the slip surface the soil pressure distribution form behind the anti-slide piles is almost triangle as a whole;②The anti-slide piles construction are completed, pile-soil interaction force and reinforced by stress reaches stability in about 16 months;③A maximum soil pressure before the anti-slide piles on the ground, the soil pressure behind the anti-slide piles near the potential sliding surface;④Before the anti-slide piles and behind the anti-slide piles, reinforced by stress from pile cap to pile bottom respectively is "compressive stress and tensile stress" and "compressive stress, tensile stress and compressive stress, tensile and compressive stress of zero before pile is tensile stress value maximize after pile.
Analytical Methods for Determination a Load Capacity of Concrete-Filled Tubes under Axial Compression
Authors: Garanzha Igor , Vatin Nikolay
Published: September 2014

In a paper are considered four existing analytical methods for determination a bearing capacity of concrete-filled tubes structures under axial compression. Analyzed approaches to the questions of a limit compression load calculation are able to withstand a composite element. Highlighted the fundamental features and similarities of discussed methods, and also their shortcomings affecting to the accuracy of the strength and stability computing results. On the particular example performed a results comparison of determination the bearing capacity by the four methods.
Energy Efficiency of Facades at Major Repairs of Buildings
Authors: Vatin Nikolai , Gorshkov Alexander S. , Nemova Darya , Tarasova Darya
Published: September 2014

The article describes the calculation method of the payback period for the thermal protection measures. These measures are aimed at the increasing of thermal protection level achieved by the additional thermal insulation of the existing building's walls. The example of the calculation for the certain settlement with the specified climatic variables is also provided in the article.
Similarity Measure for Image Retrieval Based on Hausdorff Distance
Authors: Qiang He Qun , Qian Chun Hua , Gong Sheng Rong
Published: September 2014

In general, it is difficult to segment accurately image regions or boundary contours and represent them by feature vectors for shape-based image query. Therefore, the object similarity is often computed by their boundaries. Hausdorff distance is nonlinear for computing distance, it can be used to measure the similarity between two patterns of points of edge images. Classical Hausdorff measure need to express image as a feature matrix firstly, then calculate feature values or feature vectors, so it is time-consuming. Otherwise, it is difficult for part pattern matching when shadow and noise existed. In this paper, an algorithm that use Hausdorff distance on the image boundaries to measure similarity is proposed. Experimental result has showed that the proposed algorithm is robust.
Achieving the Multi-Scroll Chaotic Attractors’ Synchronization in the Four-Dimensional System by Driving-Response Synchronization Method
Authors: Li Dan , Jin Meng , Fan Zhen , Dong Xian Da
Published: September 2014

Multi-scroll chaotic attractors’ synchronization technology is one of the important research achievements in recent years.This paper uses driving-response synchronization method to achieve the two 6-scroll chaotic attractors’ synchronization in the four-dimensional syetem.The feasibility of this method is proved by theoretical analysis and numerical simulation.
The Development and Solution of Intelligent Secondary Power in Space
Authors: Wang Xiao Peng , Yu Ping , Li Xian Feng , Qi Xin Da , Wang Yan
Published: September 2014

Intelligent secondary power supply is a power supply which integrate power conversion , data acquisition, power control ,serial communication features for aviation, aerospace high-reliability power supply system, with the diagnosis, fault protection and power health management function. Intelligent design is a necessary measures to ensure and improve the secondary power performance , is the trend of secondary power supply system of the future, It solve the shortcomings of traditional secondary power system such as poor monitoring , lack of fault identification and diagnostics, improve the reliability of the secondary power supply greatly, has great significance to improve the design of space payload.
Traffic Groomings and Graph Designs
Authors: Liang Zhi He , Liang Shi Xin
Published: September 2014

Wavelength Division Networks (WDM) rings is a very attractive network. The key terminating equipments are add-drop multiplexers (ADMs) on the WDM networks. It is essential to find an efficient routing and wavelength assignment to a given set of traffic streams such that the total ADM cost is minimal. In this paper, we will obtain the minimal ADM number A(12,v)=v (v-1)/4 when v≡1,9 (mod 24) and v≥25.
Research of JMS Security Mechanism
Authors: Li Xin Hua
Published: September 2014

According to the characteristics of the message middleware and JMS specification, this paper introduces several methods to improve the performance of the security of the JMS message middleware. The basic idea is to use two-way digital signature authentication information, and in the process of message transmission, to use negotiated session key and asymmetric encryption technology to encrypt messages. Using this mechanism can effectively protect the safety of the message transmission and storage, and to achieve a smaller time overhead associated with acceptable performance.
Analysis and Experiment of the Multi-Needles Trajectory in Magnetic Driven Model
Authors: Zhang Chi , Wu Xiao Guang , Li Shuang
Published: September 2014

Based on the principle of needle selection for the traditional knitting jacquard, this paper puts forward a new needle driven mode by magnetic suspension. At the same time the paper obtain the optimal trajectory for a single needle of magnetic suspension drive mode on the basis of the traditional trajectory, and it also analyzes the trajectories of multi needles and obtains the trajectories diagram for eight needles of their periodic motion. It also designs the hardware circuit for the control system and set up the experiment platform to carry out experimental study. The experiment proves that the target trajectories in the control system are consistent with the measured trajectories.
Control Algorithm Study on Cantilever Machine Teaching-Playback
Authors: Liu Ruo Han , Li Chun Hua
Published: September 2014

In order to realize intelligent control, the cutting trajectory of TBM research machine adopts the principle of teaching and reappearing cutting trajectory control method, combining with the control system of teaching and reappearing and SIMATIC C7, operation interface is realized by using configuration software monitoring, monitoring site visually through the operation panel parameters change, timely adjust the cutting parameters. The experimental results show that the tracking error within the scope of the permit. The method to improve the intelligence of machine cutting control provides a reference basis.
Design Principle and Method of a Passive Hybrid Damping Suspension System
Authors: Zhang Xiao Liang , Liu Jian Jun , Nie Jia Mei , Chen Long
Published: September 2014

This work presents an approach to realize hybrid damping passively on the basis of inerter-spring-damper system, and demonstrates a passive hybrid damping suspension system that offers the performances of skyhook and groundhook dampers, but without the need of an inertial frame. The design principle and method of the system are presented, and a full-car model is built to analyze and compare the performances of the conventional passive, ideal and passive hybrid damping suspensions. The results demonstrate that the ideal and passive hybrid damping suspensions have the quite consistent performance that they both can suppress body and wheel resonances. As a result, the presented suspension improves ride comfort and safety significantly. It therefore has a good comprehensive performance.
Dynamic Performance Study of Stewart Parallel Mechanism Based on Natural Frequency
Authors: Lv Bang Jun , Peng Li Kun , Chen Jia
Published: September 2014

The stiffness of transmission mechanism, assembled joints and moving platform, the compressibility of oil, and the load inertia of hydraulic Stewart mechanism will cause synthetically mechanical and hydraulic resonance problems, which will directly influence the system dynamic performance. The natural frequency and local dynamic isotropy index are adopted to evaluate dynamic performance. The variation trends of performance indices with configuration and inertia parameters are analyzed, and general optimal design rules and conclusions are obtained.
The Dynamic Swing-Up Control of Ball and Beam System Based on Periodic Input
Authors: Bo Liu , Tang Lin
Published: September 2014

This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text. In this paper, the motion of the ball and beam system based on periodic input is studied, the chaos of the system is discussed , and the relationship of the chaos and the input parameters is analyzed . on the premise of avoiding chaos, the trajectory motion law of points with suitable oscillation parameters is studied in the poincare cross-sectional view. And the swing-up control law of ball and beam system is submitted, it consists of such three parts: increasing the range of swing , adjustment and maintain constant swing .Finally, the simulations result is given to verify the efficiency of control law.
Three-Dimensional Trajectory Control via Nonlinear Adaptive Approach
Authors: Yang Rong Jun , Shi Yun Guo
Published: September 2014

A representation of robust nonlinear controller is proposed for ammunitions space trajectory control, which is combined adaptive dynamic inverse with sliding mode control. The control law design accomplishes 3-D trajectory tracking using attitude angle as control input, and includes the parameter update to correct force model errors, also sliding mode switch portion to resist winds. A transition reference trajectory which is easy to implement for tracking is designed, according to the actual location and speed of start control point. Simulation results show the proposed control strategy get accurate tracking performance of excellent dynamic characteristics in large uncertainties.
Warp Tension Control System Based on IMC
Authors: Pan Zhen , Luo Peng , Wu Zhen Yu
Published: September 2014

To ensure stability of warp tension during weaving process, the paper presented a warp tension control system which uses two permanent magnet synchronous motor (PMSM) drive let-off and take-up mechanism respectively. Based on analyzing factors influencing warp tension, a warp tension mathematical model was established. The paper proposed a tension adjustment arithmetic based on internal model control (IMC) method. The method has only one adjustable parameter which decides performance of the system. The simulation results show that the warp tension control system based on IMC has a fine effect on tension stability of warp and it is significantly superior to conventional PID control in terms of robustness and immunity.
Multi-Body Dynamics Modeling of a Spherical Mobile Robot
Authors: Cai Yao , Gao Feng , Liu Ze Ning
Published: September 2014

This paper presents the multi-body dynamics modeling of a spherical mobile robot based on Kane method. Based on the kinematics model, the Kane method is employed to analyze the motion of three main parts of robot. A two order dynamics model of spherical mobile robot is obtained. To validate such model, some simulations are fulfilled in both Mathematica and RecurDyn environments. Simulation result shows that, the modeling of spherical mobile robot is correct and effective.
A New Imputation Method for Treating Missing Precipitation Records
Authors: Liu Yu , Chen Feng Rui
Published: September 2014

This study aims to present a new imputation method for missing precipitation records by fusing its spatio-temporal information. On the basis of extending simple kriging model, a nonstationary kriging method which assumes that the mean or trend is known and varies in whole study area was proposed. It obtains precipitation trend of each station at a given time by analyzing its time series data, and then performs geostatistical analysis on the residual between the trend and measured values. Finally, these spatio-temporal information is integrated into a unified imputation model. This method was illustrated using monthly total precipitation data from 671 meteorological stations of China in April, spanning the period of 2001-2010. Four different methods, including moving average, mean ratio, expectation maximization and ordinary kriging were introduced to compare with. The results show that: Among these methods, the mean absolute error, mean relative error and root mean square error of the proposed method are the smallest, so it produces the best imputation result. That is because: (1) It fully takes into account the spatio-temporal information of precipitation. (2) It assumes that the mean varies in whole study area, which is more in line with the actual situation for rainfall.
A Novel Garment Prototyping Algorithm
Authors: Xia Ming , Wang Zhao Hui , Zhang Wen Bin
Published: September 2014

New production techniques need to be developed in the clothing industry to satisfy the demands of customers. In this paper, a new algorithm, which can transform 3D surface of the prototype garment to 2D cutting pattern, was developed. The corresponding feature points with 2D prototype pattern were defined manually using 3D cursor on the body in advance. Further 3D wireframe of garment prototype was created by connecting feature points. The final pattern of the prototype was obtained by flattening geometrically 3D wireframe of each zone. The visual assessment was also made and proved the algorithm validity. This approach improved the flattened pattern practicality.
Application of Log4j in E-Commerce Services
Authors: Liu Wen Zhi , Tao Qiu Yan , He Qin , Yu Li Juan
Published: September 2014

It is first extended the log4j and then applied the log file distribution function of log4j in E-Commerce service system in this paper. In this way, it can avoid all log information are centralized interspersed in a single log file, effectively disperse the log information of different concerns, easy to monitor and analyze E-Commerce service system operation status. Key words: Log4j, dynamic log file, extension, e-commerce services
Design and Implementation of Financial Virtual Experiment Teaching System Based on MATLAB and Data Warehouse
Authors: Jiang Zhong Yun
Published: September 2014

With the development of financial industry, the finance course calls for a new experiment teaching model to satisfy the social needs of the financial talents. By studying the environment and process of economic and financial activities, a financial virtual experiment teaching system based on MATLAB and data warehouse was put forward in this paper. The system was designed based on the J2EE component technology, used the methods of data warehouse to design the system database, and used the MATLAB numerical calculation to deal effectively with the financial experiment data. The system was cutting-edge, systematic, scalability, and good features, could well meet the financial professional experiment teaching needs.
Part Family Formation Based on Clustering Algorithm and BP Network
Authors: Liu Guan Yu , Li Shan , Wang Yu Long
Published: September 2014

To solve the problem of design and manufacturing on the production of many varieties of small batch, the parts grouping method that based on clustering algorithm, clustering validity index and BP neural network method for new parts is proposed. At first, mathematical model of part clustering is built, and parts grouping is based on the similarity of data and cluster centers which is calculated by Euclidean distance, then the effectiveness of parts group is tested by Function Index and optimal number of clusters group can be found. The algorithm is achieved by Matlab clustering toolbox, so the best part family structure is built. Furthermore, the grouped parts are used to train the BP neural network toolbox in Matlab, then simulate new parts on network to find the match group. At last, a case study was also presented to verify the feasibility of this method．
Research on Automatic Testing Framework
Authors: Guo Shuang Zhou
Published: September 2014

Introduced key technologies of Automated Testing Framework. Firstly, started from the opinion of software reusing, combined with the characteristic of Object-Oriented software and based on analyzing the feasibility of software reusing, this paper discusses the significance of Design Pattern. Secondly, in order to make the framework reusable, expansive, maintainable, referenced the idea of XUnit framework, Pattern generating Framework, this paper gives detailed introduction about the key technologies that are used in the ATF framework. The framework is implemented by using and applying many existing related design patterns and techniques such as Command, Observer, Composite, Adapter and Template Method, etc. In addition to the above, this paper also describes (Automated Testing Framework for N.E.W.), which is apply ATF to the functionality testing of N.E.W. It also analyses the test results, the framework’s shortage and provides the improved advices.
Simulation of Fluctuating Wind Speeds Based on Data-Driven Approaches
Authors: Wang Yue Dan , Li Chun Xiang
Published: September 2014

With the rapid development of information science and technology, data-driven approaches are already being the research tide in many fields. BP neural network (BPNN), support vector machine (SVM) and least squares support vector machine (LS-SVM) are introduced and adopted to simulate fluctuating time-series wind speeds in this paper. The regression-prediction models developed by implementing machine interpolation learning are established respectively. And the original speeds used as learning and forecast samples for the simulation of the data-driven approaches are obtained through AR numerical modeling. Based on the comparison of evaluation index, the results show that the simulated fluctuating wind speeds through SVM and LS-SVM are more accurate than the simulated speeds through BPNN, but the simulation time of LS-SVM and BPNN are shorter than the SVM.
Study of a New Parallel K_NN Network Public Opinion Classification Algorithm Based on Hadoop Environment
Authors: Xu Jian , Ma Bin
Published: September 2014

A new kind of network public opinion classification method based on K_ nearest neighbor (K_NN) classification algorithm in Hadoop environment is studied in this paper. In the light of distributed storage and parallel processing Characteristics of Hadoop platform, the parallel K_NN classification algorithm in the frame of MapReduce is designed. The classification ability and execution efficiency of proposed scheme is verified and the results show that the parallel K_NN algorithm enhances the network public opinion classification precision and execution efficiently.
AGROTOOL Software as an Intellectual Core of Decision Support Systems in Computer Aided Agriculture
Authors: Badenko Vladimir , Terleev Vitaly , Topaj Alexander
Published: September 2014

Some problems of decision support systems in computer aided agriculture are discussed. The main focus is made on collaborative model development, including model decomposition issues and implementation of generic frameworks for polyvariant model use. A current state and prospective ideas for improvement of modeling infrastructure suitable to perform multi-factor computer experiments with existing crop simulation models are presented.
Analysis and Simulation of Binary Search Algorithm
Authors: Liu Zhi Long
Published: September 2014

Some drawbacks of existing binary search algorithm has been improved to reduce the number of paging through improved reader in this paper to reduce the number of bytes for each tag and reader communication transmission, thereby reducing the improved algorithm of recognition time. At the same time, an improved binary anti-collision algorithm, and by Matlab simulation results show the advantages of the improved algorithm compared to other improved binary search algorithm.
Comparison of Genetic Algorithm and Determinant Method on Solving a System of Linear Equations
Authors: Massinanke Sambourou , Zhang Chao Zhu
Published: September 2014

Many methods are proposed to solve a system of linear equations (SLE), some are relatively efficient, in this study we use one type of Evolutionary Algorithms to solve a System of Linear Equation, the famous one: Genetic Algorithm (GA), we compare the efficiency of Genetic Algorithm and the determinant method (DM) in solving the system of linear equations, our experiences show that GA outperforms DM in almost all the cases.
Internet System for Mathematics Reading and Fuzzy Clustering Analysis for Students
Authors: Lin Yuan Horng , Weng Chia Hung , Yih Jeng Ming
Published: September 2014

The purpose of this study is to investigate the performance of mathematics reading based on fuzzy clustering. Mathematics reading proficiency is an importance issue which is related to the reading comprehension, mathematics achievement and mathematics literacy. Theoretical foundation of mathematics reading consists of three components, which are general reading comprehension, prior knowledge of mathematics and specific skills of mathematics. The subject is sixth graders. The researchers develop internet system of mathematics assessment and adopt fuzzy clustering to appropriately classify students. Results show that three clusters are the best and there exist characteristics and differences among clusters. Based on the findings, some recommendations and suggestions for future research are provided.
Laboratory Management System Based on Internet of Things
Authors: Liao Zhong Ming
Published: September 2014

This system taking into account the actual situation on the basis of laboratory chose ZigBee and 485 two transmission methods designed Internet of Things in the specific application of laboratory management system, the system sends to the gateway module for laboratory equipment state data on the LCD screen to scroll the display, then the gateway module 485 sends the data to the client module; client module receives the data after the data is sent to the server module, while the data stored in the database system.
Multi-Stage Emergency Resources Management Based on Supply Chain
Authors: Mu Jing , Liang Lin Lin
Published: September 2014

In recent years, the abrupt public affairs occur frequently. Emergency resources as a kind of special resource which have a key role in the rescue after disaster happen suddenly. Then whether emergency resource management is high efficiency directly affect the emergency rescue work can achieve the desired results. In this article we analysis each phase of emergency resources supply chain based on the four stages of emergency rescue process theory. Then integrate the emergency resources management with various stages. At last, we will find a way which satisfying emergency management in different stages and the whole process of emergency resource management. Meanwhile, we combine the current situation that emergency resource often more than enough for the emergency rescue arousing the public’s attention and mainly analysis how to recycle the resource that is in the recovery stage.
Study on the Stability of Supply Chain System Based on Production Decision
Authors: Zong Gao Qin , Ji Shou Wen
Published: September 2014

With the global and integrated development of economy and intense market competition, the competition between enterprises has become the competition between supply chains. Besides, the lean and agile development has made supply chain more unstable. As a result, the stability of supply chain is becoming especially important. The study of stability theory provides a new way in the study of supply chain stability. In this paper, an integrated supply chain model, whose core is manufacturing enterprise, is established based on Cobb-Douglas production function, then its stability is judged by Lyapunov exponent criteria to get the range of key index, the input funding of re-production, which can provide decision-making reference for manufacturing enterprise.
New Process for Regeneration of Main Control Valve
Authors: Cai Li Ming
Published: September 2014

Main control valve is the key component of the hydraulic system, the valve value accounts for about 30% of machinery hydraulic system. The regenerative repair of main control valve was completed by adopting grinding, electroplating and other relatively simple process. So, process is easy to operation and implementation, the maintenance cost and waste of resources is decreased, and repair effect is good. The service life of main control valve regenerated by using this technology can reach or exceed the service life of new one.
A Dynamic Simulation Approach for Flexible Manufacturing System Design
Authors: Lin Chun Wei , Parng Yuh Jiuan , Jiang Jung Jye
Published: September 2014

Achieving the greatest flexibility is the key objective for a manufacturing enterprise to design and install a Flexible Manufacturing System (FMS). Unfortunately, before the contents of “flexibility” is explicitly defined and commonly accepted within the company, the design effectiveness of an FMS will never be formally justified; not to mention evaluating its production performance once the FMS is implemented. The objective of this paper is twofold: first it presents a practical and quantitative measure of performance for an FMS by introducing the Machine Flexibility (MF) and the subsequent System Flexibility (SF). The second objective of this paper is then to develop a generic architecture for optimally designing an FMS which considers not just manufacturing and economic constraints but also dynamic perturbations from the shop floor. Machine flexibility comprises two parts: 1) the descriptive segment provides the operation type information and 2) the quantitative segment uses a weighted relative scaling (WRS) method to evaluate the flexibility based on machine power generation, operation cycle time, machine design mechanics, working volume, machining precision, and controller performance. System flexibility contains five attributes for an FMS: power generation, system design mechanics, working volume, system precision, and dynamic performance. The adaptive architecture for designing an FMS is composed of three modules: the design preprocessor, the reference system generator, and the alternative systems generator..
A Rapid Adjustment Simulation System for Flexible Fuselage Assembly
Authors: Wu Feng Feng , Li Dong Sheng , Guo Hong Jie , Zhang Shu Sheng
Published: September 2014

The utilization of reconfigurable numerically controlled tooling is important for flexible fuselage assembly. An online programming and simulation system for flexible tooling is presented, which is composed of two modules. The online programming module generates NC code from an adjustment sequence and path, taking into consideration the process and device parameters. This paper details the second module, the visualized simulation module, which validates and optimizes the related adjustment process. This module covers three steps, those are, the creation of a virtual simulation environment based on the light-weight 3D model, the loading of the key feature points related to the adjustment and process information, and the adjustment simulation. The system can rapidly response to “one fixture with more models” and “one fixture with more states” deep flexibility demands for digital fuselage assembly, enable the flexible tooling to a have better capacity for independent adaptability. An example of flexible fuselage assembly process is used to illustrate the detail and advantages of the system. The three-step simulation strategy is proposed and detailed in this paper.
Agricultural Machinery Spare Parts Demand Forecast Based on BP Neural Network
Authors: Hu Yao Guang , Sun Shuo , Wen Jing Qian
Published: September 2014

With the rapid development of agricultural machinery, forecasting the demand for spare parts is essential to ensure timely maintenance of agricultural machinery. Based on features of spare parts, BP neural network is chosen to forecast the demand. First, this paper analyzes factors that affect the demand for spare parts. Second, steps and processes of neural network prediction are described. The third part of this paper is case study based on certain brand of agricultural machinery spare parts. BP neural network turns out suitable for forecasting the demand for spare parts.
Study on Optimization Matching Algorithm for Automotive Powertrain
Authors: Cao Feng Ping , Zhou Li Fa , Wang Yong Di
Published: September 2014

In order to reduce fuel consumption and ensure dynamic performance of the car, an automotive powertrain optimization algorithm was presented in the paper. Firstly, the evaluation index of automobile dynamic performance and fuel economy were introduced. Then, the objective function was built, and the transmission and main reducer transmission ratios were designed as variables, and parameters of the vehicle transmission system were optimized by using the genetic algorithm. Finally, a vehicle simulation model by SimulationX software was established, and the power and economy performance before and after optimization were compared and analyzed.
The Analysis and Application of VSM in a Shoemaking Enterprise
Authors: Lv Min , Wang Qiang , Zhang Nian , Jiang Jian Chun
Published: September 2014

In order to provide a basis for process optimization of manufacturing enterprises, this paper analyzes the workshop process according to the current state of value stream with supermarket pull system, visual management, quick die change, automation and other lean techniques by taking the molding workshop of a shoemaking enterprise as an example.
Production Operation Management Research of Mixed Private Cloud Enterprise
Authors: Li Guang Rong , Wang Zhi Liang , Wang Yun Xia , Lu Yong , Hu Sheng Ping
Published: September 2014

According to manufacturing characteristics of mixed private cloud enterprise, production operation management requirements of mixed private cloud enterprise are analysed. Function of production operation management in mixed private cloud enterprise is summarized. Specific content of production operation management is inducted based on mixed cloud enterprise. The process of production operation management are designed in detail. Object model diagram of production operation management are elaborated. It is analysed that the content of the reform of production order and the specific process are obtained. It is researched that production order form to be queried and finally end process has been preliminaryly discussed.It has laid a basis for optimal and reasonable application of production operation management.
Analysis Research of Maintenance Quality Evaluation Methods on Equipments
Authors: Zhang Li Jun , Li Ai Min , Luo Jiu Lin
Published: September 2014

Aiming at the research status in the field of the equipment maintenance quality evaluation methods, this paper describes the basic type of them in detail, mainly in evaluation mode and arithmetic, points out their characteristic and problems, and analysis and compares them. At last it offers theoretical reference for equipment maintenance quality evaluation methods research.
Thoughts and Practices to Improve Higher Engineering Education under the Background of Mass Education
Authors: Fang Yong Ze , Li Dong , Chen Jie
Published: September 2014

Engineering education in China’s colleges has been progressing rapidly, while there is a wide gap between the students’ engineering abilities and the requirements from enterprises. Consequently, engineering education should be guided by professional evaluation, centered on strengthening college students’ aptitudes and qualities. This paper analyses the concepts of college engineering education and an effective approach to improve current college engineering education in China.
Under the Guidance of “Macroscopic Engineering”, Cultivate the Engineering Quality of College Students in Muti-Measures
Authors: Miao Xian Wen , Yuan Gen Fu , Gu Yuan Qiang
Published: September 2014

The advanced talents with applied technique should be composite, creative talents in the background of macroscopic engineering. Whereas some engineering training center have not transformed from the metalworking practice mode which can not adapt itself to the requirements of talents cultivation in 21 century, our university reform the contents of practice teaching and innovate the teaching mode of engineering training, integrate and optimize the internal teaching resources and strength the deep cooperation with enterprises under the guidance of the conception of “Macroscopic Engineering”. We structure the engineering training practice teaching platform with intercross of many subjects in order to cultivate the engineering quality of students in muti-measures. The students received the cultivation in the aspects of engineering conception, engineering practice ability and creative ability, which we received unprecedented teaching results.Keyword: Concept of “Macroscopic Engineering”; Intercross of many subjects; Practice Platform; Engineering Quality
The Research of Rod Roller Conceptual Design Based on the Innovation Theory of TRIZ
Authors: Li Fu Xing
Published: September 2014

Abstract: Whereas there exist such problems as compaction blind spot in the edge and cornier area of construction rod, and the narrow site has disabled the large rod roller to go into operation, an innovative design method based on the TRIZ theory has been put forward. Meanwhile, a detailed solution to the conflicts generated in the efforts to improve the differency of the large road roller has been proposed through the use of the contradiction conflict solution matrix comprised by 39 engineering parameters and 40 pieces of inventive principles pertaining to TRIZ. Furthermore, the feasibility to conduct TRIZ-theory-based innovative design in the field of engineering machinery has been manifested, thus providing important theoretical tools for design ideas in the field of traditional engineering innovation.
Vibration Analysis of Rotating Cylindrical Shells
Authors: Wan Hao Chuan , Li Yi Nong , Zheng Ling
Published: September 2014

To simplify the model of rotating cylindrical shell, the static forces are neglected and the vibration equations are established. Transfer matrix method is used to solve the equations and the example shows that the simplified model has little effect on the result. So the simplified model can be used in complex structures such as multilayer and multidiameter shell.
Vibration Characteristic Optimization of Overhead Weapon Station Based on Dynamic Stability Concept
Authors: Dan Wei , Wu Yong Liang , Lin Yuan , Hu Tao
Published: September 2014

In view of poor accuracy of an overhead weapon station’s automatic firing, analyze the main vibration parameters affected the projectile dispersion, establish the vibration characteristic optimization model based on dynamic stability concept, and sensitivity analysis. Through optimization design of weapon station structure parameters, optimize the vibration characteristics and improve the accuracy of automatic firing. This method has certain reference value for structural modifications of the weapon station.
Analysis of 2-D Impedance Cloaking Problem Based on Boundary Element Method
Authors: Alekseev Gennady V. , Baydin Andrei , Larkina Olga
Published: September 2014

Control problems are considered for a two-dimensional model describing wave scattering in an unbounded homogenous medium containing an impenetrable covered (cloaked) boundary. The control is a surface impedance which enters the boundary condition as a coefficient. The solvability of the original scattering problem for 2-D Helmholtz equation and of the control problem is proved. Optimality system dгescribing the necessary extremum conditions are derived. The algorithm for numerical solving of the control problem based on the optimality system and boundary element method is designed.
Choosing Plastering Machines and Dry Mortars for Plastering Mechanized Way
Authors: Vatin Nikolay Ivanovich , Gamayunova Olga Sergeevna , Petrosova Daria Vladimirovna
Published: September 2014

Mechanized technology of application of dry building mixes is a separate highly qualified branch of in the field of finishing works. Its effectiveness is determined by the use of special mixes intended for mechanized application method and special equipment designed for their use. An important factor in improving the quality of work is the qualification of construction workers, who use new technologies. Without special training, workers can not realize all the possibilities of modern materials and technology, and therefore will not be achieved economic effect.
Multi Variable Multi Objective Optimization for the Cutting Head of Roadheader
Authors: Zhao Bin , Zong Xue Mei , He Bing , Zhang Li Jie
Published: September 2014

Roadheader cutting head design parameters include rotational speed, yawing speed, cutting line spacing and teeth numbers on each cutting line. They all have an important effect on the performance of roadheader, which is mainly includes producing dust quantity, cutting specific energy, production efficiency and load fluctuations. Based on the cutting performance analysis of a single cutting parameters, using the fgoalattain function in Matlab optimization toolbox, multi variables multi objectives optimum design of roadheader cutting head is realized, which provide theoretical support for the design and analysis of the roadheader cutting head.
1250mm2 Conductor Self-Damping Characteristics
Authors: Qi Yi , Zhu Kuan Jun , Liu Sheng Chun , Liu Bin
Published: September 2014

Self-damping test and analysis for five types of 1250mm2 large section conductor are performed, and analytical expression and frequency response characteristics are obtained. Comparison and analysis between round wire and formed wire 1250mm2 conductors are given. And the main protection frequency range of Aeolian vibration of 1250mm2 conductor is determined from 0 to 30 Hz.
Quantitative Fire Risk Assessment of Gas Pipeline Leakage
Authors: He Jing , Zhang Li Jing , Tao Gang , Dai Xin Qi
Published: September 2014

Fire risk of gas pipeline leakage is high.The factors contributing to gas pipeline leakage most are third party damage, corrosion, design and incorrect operation. The accident consequences of gas pipeline leakage and quantitative risk assessment method of gas pipeline leakage consequence are analyzed. In order to achieve quantitative fire risk assessment of gas pipeline leakage, flash fire model, vapor cloud explosion model and thermal radiation damage criterion are analyzed. Firstly, the gas leakage quantity is estimated. Then, the heat radiation estimate flux, the thermal dose and damage range are got by using flash fire model, vapor cloud explosion model and the thermal radiation damage criterion respectively.Combined with an example of gas pipeline, damage ranges of different disaster patterns are estimated according to different gas pipeline leakage pattern. Through comparing the accident consequences of gas pipeline leakage, this paper provides some reliable scientific references for gas pipeline management departments.
Analysis on Failure of Accumulator of Horizontal Cold-Chamber Die Casting Machine and Accident Prevention
Authors: Li Wen Wei , Ye Qiang , He Cheng Dai
Published: September 2014

This article provides a comprehensive post hoc analysis on the explosion of horizontal cold-chamber accumulator occurred in a company in Hangzhou in May 2014, which is considered as a pressure vessel explosion accident, but not a special equipment accident, and is thus determined as a production safety accident. Based on detailed analysis of working principle of horizontal cold-chamber die-casting machine, the article puts emphasis on working principle of bladder accumulator and deduces two possible causes of accident through thickness measurement, metallographic test, explosion energy estimation and mechanical test on the faulty accumulator. On the basis of accident analysis, the article presents that great importance should be attached to the safety in inflation of accumulator of die casting machine, to prevent similar accidents from happening again by improving the operation system.
Investigation of Heat Dissipation for Computer CPU Radiator
Authors: Liang Li Hua , Feng Bin , Su Li Ping , Liu Yong Zhen , Chen Ping , Zeng Jian Min , Gan Wu Kui , Lu Jin Bo
Published: September 2014

A heat sink is a kind of heat exchanger that cools a device by dissipating heat into the environment. The design of heat sink by numerical simulation depends to a large extent upon boundary condition between the heat sink and its surroundings. The boundary condition is usually defined by Heat Transfer Coefficient (HTC) which can be used to measure heat resistance between heat sink and surrounding. Determination of HTC is a difficult problem, depending on many factors such as air velocity, material properties, shape of radiators and surface treatment, etc. A new simple reverse method has been suggested in the present work. The reverse method is suggested according to Mean-Value Theorem in mathematics. By comparing the temperature curves between simulation and real measurement, the temperature differences can be minimized by selecting different HTCs.
A New Approach for Folding Process Modeling of Passage Airbag
Authors: Liu Guo Qing , Xie Guo Hong , Cui Zhen Shan
Published: September 2014

A new Passage Airbag (PAB) folding method which integrates simulation folding and manual folding is presented. Determining how to get a multi-layer 2D surface is vital to PAB folding. By means of 3D PAB flattening process simulation, 2D surface with a minimum area loss is created. This method avoids the traditional measurement of real PAB to obtain 2D airbag with inaccurate shape and size. After flattening PAB simulation, the 2D surfaces are meshed with respect to the predefined folding lines. The subsequent folding steps of flat 2D airbag are carried out according to the folding requirements. Finally, the reference geometry meshing and folded airbag are obtained accurately and rapidly. The static PAB deployment test is modeled using particle method for gas flow to validate this folding method. Good correlation between simulation and test results during early deployment phase of airbag is achieved. It has proven the effectiveness and feasibility of this PAB folding method.
Multi-Domain Unified Modeling and Simulation of the Electrical Vehicle
Authors: Xia Hong Jian , Tian Li Juan , Chen Xin Du , Xiong Hui Yuan
Published: September 2014

Due to the simulation of electric vehicle usually includes several domains which is difficult to integrate when the models are from different disciplinaries. In this paper, a library of the Electrical Vehicle is built using the unified multidisciplinary modeling language Modelica to model chassis, motor, batteries, and driver. And then the interfaces of different sub-systems is defined to assemble the sub-systems of the vehicle. Finally, some examples on the performance of Stability control of the Electrical Vehicle are implemented to verify the correctness of the model and the validity of the method.
Research on the Angle of Swirl Chamber Diesel Engine with Dual Channel
Authors: Fu Jun , Tang Yuan , Yuan Wen Hua , Ma Yi , Chen Wei , Li Guang Ming
Published: September 2014

Swirl chamber diesel engine’s insert piece of channel performance has a great influence on the swirl chamber indoor airflow movement condition. So based on the 175F series bell flat bottom type swirl chamber’s single connection channel improvement, the influence law of swirl chamber indoor air movement during the injection time by the double connection channel angle at the engine rated speed 2600r/min was studied. Simplified boundary conditions to establish its mathematical solution model for the swirl chamber, then the fluid simulation software was used to research the original scheme and double channel with angle of 50 ° and 30 °, 40 °, 60 ° schemes’ swirl chamber indoor air movement. Results show that the angle of 40 ° dual channel form, the loss of the throttle was reduced, and the swirl chamber air velocity increases obviously, the swirl chamber air velocity in injection time up to 125 m/s,which not only increased indoor vortexes energy but also contribute to oil and gas preferably blended, and near the nozzle the temperature lower 20 °C than the original machine, effectively reducing the nozzle heat load.