bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation and Optimization Design Based on Adams Engine Mounting System
Authors: Xie Jian Xin , Wang Xiao Le , Liu Chao
Published: October 2014

The content of this subject research is to conduct optimization for engine mounting system, and through optimization, it can make the vibration between engine and vehicle body achieve a minimum, using Adams software for simulation. It studies the isolation vibration of the engine mounting system and conducts goal optimization for fixed frequency. This paper uses two methods for optimization. One is to use the rational allocation of fixed frequency to optimize the fixed frequency, and the other is to use energy decoupling method to optimize the fixed frequency. It uses Adams software for simulation of the optimized fixed frequency and conducts comparison of simulated results. The simulated results show that the optimized energy distribution situation almost achieves 90%. Compared with original data, decoupling degree also has a very great improvement, illustrating that the optimized data has greater effect for the isolated vibration of engine, in order to further verify the feasibility of optimization design method.
Research on Polymer Materials in Bio Medical and its Application
Authors: Xu Jing
Published: October 2014

Intelligent hydrogels is as drug carrier, and it has a good application prospect. There are some changes factors in the human environment, such as temperature, pH. Therefore, the temperature sensitive hydrogels and pH sensitive hydrogels can release system for drugs in the body. So the paper detailed descripts a novel MWCNTs good dispersion of PMAA/MWCNTs nanohybrid hydrogels. The introduction of MWCNTs significantly increased the hydrogel pH response and mechanical strength, and depends on the MWCNTs component ratio, particle size and concentration of cross-linking agent. The study found, swelling rate of hybrid hydrogels was faster than the pure PMAA hydrogel, and the swelling behavior were explained. The compression stress-strain experiments should be found, MWCNTs load transfer plays an important role in improving the mechanical properties of the hybrid hydrogels network compression.
Spatial Query-Combined Tour Scheduler for Electric Vehicles
Authors: Lee Jung Hoon , Kim Soo Young
Published: October 2014

This paper designs a spatial data-centric tour and charging scheduler for electric vehicles, which need energy-efficient route planning, especially when visiting multiple destinations, due to their short driving range. Basically, the hybrid orienteering problem solver finds a feasible tour schedule for mandatory user-selected tour spots and optimal system-recommended charging spots, aiming at reducing the waiting time and meeting the given constraint. To recommend essential candidates, our system manages the information on tour spots and charging facilities in the spatial database, adjusting the bounding box size according to the pre-analysis result. The pre-analysis module can implement a sophisticated recommendation logic based on the preprocessed data customized mainly from geographic analysis. In addition, by continuously updating the current status of each charger, the recommender can catch the installation of new charging facilities and exclude the failed or overbooked chargers.
Solar Power Generation System in the Application of the Unit Worker Bath Based on Single-Chip Microcomputer Control
Authors: Zheng Jun Long
Published: October 2014

For solar power generation system based on single-chip microcomputer control application in the unit worker bath problem, this paper introduces the working principle of solar power, including solar power system of power and solar power, solar power conversion Z - source converter, discusses the hardware of solar power generation system, solar power generation of software, including in software discussed, mainly discusses the A/D interrupt of solar power, solar power generation Timer interrupt the functionality of the M PPT and solar power, solar power system for single chip microcomputer control application in the unit worker bath, provides the technical support.
Texture Classification of 3D Surface Textures via Directional Quincunx Lifting
Authors: Li You Jiao , Ju Tong Sheng , Gao Meng
Published: October 2014

This thesis presents a new approach to classify 3D surface textures by using lifting transform with quincunx subsampling. Feature vectors are generated from eight different lifting prediction directions. We classify 3D surface texture images based on minimum Euclidean distance between the test images and the training sets. The feasibility and effectiveness of our proposed approach can be validated by the experimental results.
Study on Fuzzy Immune PID Controller for Main Steam Pressure Control System in Marine Steam Power Plant
Authors: Wang Peng , Hao Meng , Ji Qing Zhou
Published: October 2014

The main steam pressure control system in marine steam power plant has the characteristics of time-varying, nonlinear and strong coupling. In order to get satisfactory control effect, we propose a fuzzy immune PID controller with which we can make comprehensive utilization of advantages of artificial immune, PID and fuzzy controller. We build up mathematical model of main steam pressure control system, carry out simulation and comparison. The results prove that fuzzy immune PID controller can significantly reduce the overshoot and settling time of main steam pressure. It is more effective in main steam pressure control system than PID controller.
Liquid-Solid Hydrocyclone Numerical Simulation and Separation Efficiency Analysis
Authors: Sun Xian Ming , Wei Lei
Published: October 2014

This paper analyses the basic structure and the separation theory of hydrocyclone. Three-dimension spiral flow theory and CFD method was used to simulate the Φ75mm hydrocyclone. The paper focuses on researching the separation efficiency influenced by different inlet velocities, volume fraction values and the particle diameters. Besides, the influence of the thickness of overflow pipe is also considered. Results of numerical simulation shows that with the inlet velocity range from 1 to 5m/s and the particle diameters range from 2 to 5um, the hydrocyclone separation efficiency is increasing. As the volume fraction value increased from 1% to 15%, the separation efficiency descended. Increasing the thickness of overflow pipe can reduce the turbulent kinetic energy of hydrocyclone, which can make the inner flow field more stable and enhance the separation efficiency.
Application of TRIZ Substance-Field Analysis Model in Equipment’s Combat Resilience Design
Authors: Ma Sa Sa , Zhang Chao Wei , Xu Ying Xin , Yang Shi Ying
Published: October 2014

In order to meet the design requirement of maintainability in equipment’s battlefield guarantee process, substance-field analysis model based on the TRIZ theory is introduced in this paper. It can improve system’s maintainability design efficiency to predict the evolution direction of technical system and analysis the ideal solution by the model. Taking the design of combat resilience of radar feed transmission system as an example, this paper analyzed the application of substance-field model in equipment’s combat resilience design. The result shows that TRIZ substance-field analysis model can effectively guide the combat resilience design, specify the design direction, and improve the design efficiency.
New Thermal Energy Converters Based on Polyelectrolyte Hydrogels
Authors: Suleimenov Ibragim , Falaleev Andrei , Shaltykova Dina , Panchenko Sergei , Mun Grigoriy
Published: October 2014

The theory of thermal energy converters based on polyelectrolyte hydrogels has been developed. The possibility of providing the circulation of a fluid in the contour by controlled variations of the local value of concentrations of the mobile ions that cause an osmotic pressure gradient was shown. On the basis of the solution of motion equations of the mobile ions the numerical estimates of parameters of proposed type of circulation contour are given.
The Reciprocating Compressor Fault Analysis Based on ORSGWT
Authors: Zhang Si Yang , Wang Ri Xin , Li Yong Bo , Xu Min Qiang , Cui Zi Qian
Published: October 2014

It can be found that the redundant second generation wavelet function had more accurate analysis ability compared with the other wavelets and wavelet packets through simulation signals analyses. The analyses of the industrial signals may be more difficult due to its complex character. The de-noising ability of the redundant second generation wavelet to the industrial noise was confirmed by comparing with wavelet packets. But the signal after de-noising still expresses confused and makes analysis difficult. The optimized redundant second generation wavelet transform (ORSGWT) method was established with Newton interpolation and scale thresholds. Then the fault signals of valve block gap being processed with ORSGWT method were smoother and more apparent about the fault characters comparing with the normal state signals.
A Kind of Resistance Capacitance Measurement Method Based on Time Constant
Authors: Wang Xuan Ze , Mo Xu Qing , Yang Liang En , Zhai Zhong Sheng , Liu Wen Chao , Xiong Zhi
Published: October 2014

This paper proposes a capacitance resistance measurement method based on time constant. Using the charging and discharging characteristics of the resistance and capacitance measures the value of the resistance and capacitance through a semi potential rise and fall time measurement. Theoretical analysis of the relationship between the value of the resistance and capacitance and the measuring time, designing the fast second charging and discharging method meeting the initial condition of charge and discharge, improving the measurement speed, expanding the measurement range of the resistance and capacitance. Realizing the effective measurement of the resistance and capacitance by the FPGA control logic and timing method.
A Research about Acquisition and Transmission of the Water Meter's Image Based on STM32
Authors: Xue Yan Lin , Chen Bin Wei
Published: October 2014

This paper introduces the hardware and programming involved in collecting the image of the digital code wheel by microprocessor STM32 directly driving camera chip OV7670 and the transmission of collected image. This design simplifies the hardware structure to the greatest extent and minimizes cost. Our design has three advantages. Fist, direct driving saves the intermediary register chip, simplifies the circuit and also reduces the amount of elements used. Second, by using the CMOS digital image sensor with windowing function—OV7670 to capture the image of code wheel we simplify the hardware structure and reduces the cost because of the D/A conversion circuit and complex programmable logic device contained in OV7670. Third, we successively solve the problem of the small capacity (20k) of STM32F103C8T6 chip’s SRAM by cutting out 24080 images from 640480. So time spent on data transmission and processing can be shortened.
New Optical Sensor Panel on Nanocomposite Base
Authors: Panchenko Sergey , Suleimenov Ibragim , Sedlakova Zdenka , Semenyakin Nikolay
Published: October 2014

Paper describes the general construction of optical sensor panel on basis of nanocomposite. Appropriate nanocomposite material using industrially produced particles which provides needed optical contact is chosen. Detailed description of functional scheme of optical sensor panel is provided.
Complex Wireless Sensor Network Routing Strategy for Information Rapid Transmission
Authors: Gao Zhan , Zhu Qing Bo , Wei Chun Mei
Published: October 2014

For wireless sensor networks for energy requirements are very high and limited node energy characteristics of wireless sensor networks to improve information transfer for the purpose of quick study proposes a wireless sensor network nodes spread weighted routing strategy. The simulation result were weighted node degree technical analysis, analysis of the advantages from the principle of routing policy change, thereby effectively increasing the network lifetime and improve the data transfer rate and reduce the transmission delay, is more suitable for large-scale wireless sensor network.
Design of LQR Controller for the Inverted Pendulum
Authors: Wan Li Li , Lei Juan , Wu Hong Xia
Published: October 2014

For the instability of the inverted pendulum, a LQR controller is designed based on optimal control algorithm in this paper, which can control the pendulum angle and the cart position at the same time. The basic principle of LQR optimal control is analyzed and the LQR controller is designed and simulated in this paper. The simulation results show that the designed controller is effective. It has a good effect of equilibrium and stability control, and the system's anti-interference ability is improved.
Design of Equipment Power Remote Control System Based on Ethernet
Authors: Mu Li Li , Xue Cheng Guang , Ni Shen Xiang
Published: October 2014

A network power control system was designed in the paper based on MCU STM32 in order to realize network control to the industrial site power equipment. Software and hardware design scheme of the system were given. STM32F103 chip was used as the main controller in the system and ENC28J60 chip as the Ethernet controller to connect network, the μIP protocol stack was used for network data communication. Network power control test experiment was carried out, the result showed that it can control the equipment power remotely, and can receive real-time information data of the industrial field through Ethernet.Compared with the traditional power control system, this system has the characteristics of intelligence, integration and remote.
Post Processing for Five-Axis Machine Tools with Pose Error Compensation
Authors: Ding Shuang , Huang Xiao Diao , Yu Chun Jian
Published: October 2014

This paper describes the enhancement of the machining precision of 5-axis machine tools. Most post-processors did not consider the pose errors so that the processing error was increased invisibly. A post processing method with pose error compensation was proposed for table/spindle-tilting type machine tools.12 position errors and 12 rotation errors were compensated by the proposed method. Mathematical model contained pose errors which converted cutter location data into machine motion coordinates was established based on inverse kinematics and the analytical solutions of NC code were derived. The tool paths of the freeform surface machining were posted with the presented method. And the simulation experiment was carried out which verified the feasibility of the post processing method with pose error compensation. Comparison of processing error shows that the post processing with pose error compensation can effectively improve the machining accuracy by approximately 50%.
The System Identification Analysis of the Rolling Motion Model for the Unmanned Boat
Authors: Yang Wang Lin , Yang Song Lin , Zhang Sheng , Ma Tian Yu
Published: October 2014

In this paper, the author took an unmanned planting boat as the object of study and conducted a series of roll decay test on condition that the ship model was in different drafts and tilt angle. The author established eight kinds of mathematical model of roll decay motion model system identification by making a cross combination of linear or nonlinear righting moment and linear or nonlinear damping. Based on the principle of system identification, the author established the optimization calculation of the objective function. Then the author adapted the genetic algorithm of system identification program based on Visual Basic 6.0 and got eight kinds of identification programs. By identifying respectively the test data of the roll motion of the unmanned planting boat, the author confirmed the feasibility of the adapted program. Comparing large drafts and tilt angle identification results, the author found a reasonable hydrostatic roll motion equation of the unmanned planing boat in the case of large drafts and tilt angle, and made a preliminary analysis.
Design of a Switching Power Supply for Wheelchair Controller Based on Magnetic Isolation Technology
Authors: Yang Rong , Wang Li , Zhang Xiu Feng , Ma Yan
Published: October 2014

This paper analyzes the principle and advantages of magnetic isolation feedback technology. And an effective method of 5W switching power supply, which can be used for controller of electrically powered wheelchair, is introduced. The main circuit is verified on the DC motor driver module of a wheelchair controller PGDT VR2. The experimental results show that the circuit works stably and can meet the design requirements.
Design of OPC Client Based on .NET for Advanced Control System
Authors: Huang Yu , Xue Yan Lin
Published: October 2014

Aiming at the problem that there are many .NET based software need to access COM based OPC servers. This article developed an OPC client for .NET based advanced control software. Firstly, this article introduces the structural characteristics of OPC, then describes the whole process to develop this client software, and finally shows the experiments result that the client could access data with an OPC server stabilized. This client could be a good solution to solve the communication problem between .NET and COM platforms.
Research of the Interpolation Method Applied to the Numerical Simulation of the Casting Filling Process
Authors: Lv Xiao Chong , Yin Ya Jun , Zhou Jian Xin
Published: October 2014

With the development of computer technology, casting simulation plays an increasingly important role in foundry production. VOF (Volume of Fluid) method which tracks free surfaces is widely used in casting simulation because it is simple to solve and easy to achieve. However, in the last stage of mold filling process, the solution speed of VOF method is very slow because the space to fill becomes smaller. To solve this problem, interpolation formula is applied to the calculation of temperature field and an interpolation method to calculate the last part of temperature field in mold filling process is presented in this paper. The solution is to calculate temperature field of unfilled grids based on the temperature filed of filled grids at the last stage of filling process. Comparison between the results of interpolation method and theoretical calculation illustrates the rationality of the interpolation temperature field in this paper. Numerical simulations of actual castings indicate that the interpolation method can greatly improve the speed of getting temperature field under a certain accuracy. This paper has important implications to the calculation of numerical simulation in mold filling process.
Applications of Color Morphology in Image Denoising
Authors: He Shui Ming , Li Xue Lin
Published: October 2014

Mathematical morphology can be seen as a special digital image processing method and theory, which has been widely used in various fields. In this paper, the mathematical morphology is applied to the color image processing. In thespace of color image, I have simply expounded the theories and properties of color morphological changes, and defined its morphological operators. According to the application of omni-directional and multi-angle structuring elements composite morphological filter in gray image, I put forward a kind of color morphological filter with omni-directional and multi-angle structuring elements composite. This algorithm has retained its advantages in gray image, however, remaining some drawbacks. Through the optimization of results based on this algorithm, we finally get the relatively ideal denoising effects.Keywords: mathematical morphology;color model;color model; color morphological filter
Characteristic Analysis and Optimization for the Tailstock Body of the NC Lathe
Authors: Lu Mo Wu , Li Ming Jie
Published: October 2014

The characteristics of the NC Lathe tailstock has great influence on the machining accuracy of NC machine tools. Solidworks software is used to establish the tailstock body entity model, then import it into the Workbench software for finite element analysis and conclude its dynamic and statics characteristics. According to the result of the analysis on the topology optimization. Guarantee after optimization, the tailstock body not only can satisfy the requirement of machine tool, the quality can also be reduced by 5%. In saving material at the same time also can reduce the motion inertia, improve the machining accuracy.Keywords: tailstock body; statics analysis; modal analysis; topology optimization; Workbench;
Parameters Selection of LLE Algorithm for Classification Tasks
Authors: Hu Feng , Wang Chuan Tong , Wu Yu Chuan , Fan Liang Zhi
Published: October 2014

The crux in the locally linear embedding algorithm or LLE is the selection of embedding dimensionality and neighborhood size. A method of parameters selection based on the normalized cut criterion or Ncut for classification tasks is proposed. Differing from current techniques based on the neighborhood topology preservation criterion, the proposed method capitalizes on class separability of embedding result. By taking it into consideration, the intrinsic capability of LLE can be more faithfully reflected, and hence more rational features for classification in real-life applications can be offered. The theoretical argument is supported by experimental results from synthetic and real data sets.
Design of Interlnk Protocol Packet at Embedded Linux
Authors: Xue Ji Wen , Ma Qun , Liu Zheng , Li Rui Ling , Li Hua Li
Published: October 2014

Aiming at the file transmission problem between electronic controller for an engine and the portable test equipment based on AT91SAM9263 and Linux, the Interlnk/Intersvr software and their communicating protocol are analyzed and studied which used by electronic controller. The message format and communicating process are made clear by putting up protocol analysis environment at laboratory and source code analysis, FAT file system structure and its access methods are studied, and the file transmission function of test equipment has been fulfilled. The results of test indicate that the desired goals have been reached.
Design for Virtual Laboratory of Mechanical Drawing on Web
Authors: Qiu Long Hui , Wang Gang
Published: October 2014

This paper discusses the design for virtual laboratory of mechanical drawing, and analyzes the characteristic of mechanical drawing virtual laboratory and the requirements for virtual laboratory, select design platform for virtual laboratory. The method of solid design is discussed in detail. The data structure and the algorithm of modifying data with real-time deformation is designed. And the operating interface with strong interactivity is designed. And at last, a virtual laboratory of mechanical drawing base on Internet is designed.
Development and Application of CAD Technology
Authors: Chen Yan
Published: October 2014

Computer Aided Design (referred to as CAD) is the cross technology of product Design which is applied in engineering field by electronic Computer technology. With CAD technology application is more and more widely and popular, CAD technology is developing towards the direction of the open, integrated and intelligent. CAD technology is become more mature. Nowadays, the CAD technology in mechanical design can only handle numerical work, including calculation, analysis and drawing. The microcomputer platform 3D CAD software showed the trend of rapid development. This paper introduces the development and application of CAD technology, the developing characteristics of modern CAD technology, and explains the development trend of CAD technology.
Development and Application of CAD Technology in Railway Vehicle Studying
Authors: Wang Xu Xu , Hu Guang Zhong , Xiao Shou Ne , Tang Yong Ming
Published: October 2014

The emergence and development of CAD technology, and its development and current status of applied research on rail vehicle in our country is introduced. For four key technologies of CAD on digital design direction of rail vehicles, which are integrated, modular, parametric, data management and control, is discussed detailed. What’s more, the direction of rail vehicle design is referred to, which introduces new innovation of TRIZ, universal design and reconfigurable design in theory, changes reverse engineering to top-down design in the design method, realizes the organic combination of modular and integrated in design platform development, and accelerates basic technology research which contains unstructured data processing technology, non-relational database management technology and visualization technology in data management .
Group Technology Applied in Quality Management System
Authors: Li Ying Ji , Wang Yong Lin
Published: October 2014

This paper is based on a company that manufactured the nuclear power components. This paper Studies the quality management that aimed at characteristics of multi specification and small batch production. The components which are produced at this company have been used in new energy field. Quality of nuclear power components can meet the technical requirements or not is very important to the operation and safeguard of nuclear power station in future. Group technology combined with statistical process control technology and applied in the quality management system to analyze the testing data of each working procedure in multi-kind and small-quantity production to achieve the goal of improve and control the quality of the product.
Quantum Evolutionary Algorithm for Chemical Batch Scheduling Problem
Authors: Tang Qi , Liu Peng , Tang Jian Xun
Published: October 2014

This paper presents an improved particle swarm optimization combined with quantum evolutionary algorithm (QAE). In the algorithm, continuous coding represents weight information of the batches’ sequence to enhance the ability of handling the constraints. The batch separation strategy unifies the relationship of scheduling time into minimum time span between batches and brings about the feasible processing sequence. Scheduling generation and repair strategies are proposed to obtain feasible solutions. In order to verify the performance of the QAE algorithm, the well-know benchmark scheduling instances are tested. The computational results show that the QAE may find optimal or suboptimal solutions in a short run time for all the instances.
Extracting Cognitive Maps for Intelligent Conceptual Product Design
Authors: Wang Ming Wei , Zhou Jing Tao
Published: October 2014

Cognitive maps represent decision makers’ mental maps and their strategies, which are always uncertain, ambiguous and hard to be formalized. In order to make intelligent design decision-making, a Bayesian approach for constructing cognitive maps is proposed in this paper. The cognitive map is modeled compatible with a Bayesian Network. Then cause-effect mapping rules between design elements embedded in cognitive maps can be made explicit by means of network structure learning. A score-based greedy search algorithm is implemented for network structure learning, in which penalized mutual information is defined as the scoring metric and hill-climbing search algorithm is used to find the highest-scoring network. The eliminating loop operator is introduced into the algorithm according to the restriction of the edge directionality.
The Ordering Strategy of ES Model and Option Contract
Authors: Wang Xue Wu , Meng Jiao , Jiang Ping
Published: October 2014

In this paper, we incorporate retailer’s risk attitude by means of ES model into the ordering decision for seasonal product and discuss the optimal ordering decisions of the retailer under the option contract mechanism and the wholesale price contract mechanism. We show that the optimal ordering quantities of spot commodity and option commodity are exist and unique.And further analyze that the effect of retailer’s effected profit, option contract on the optimal ordering decision. Finally, we exam our theories by some numerical examples.
Hysteresis Modeling and Analysis for Dynamic Compaction
Authors: Shen Pei Hui
Published: October 2014

The soil compactor is one of the most important construction machineries which play an significant role during our economic development. And the complicated nonlinear characteristic of equipment-material system is an interesting field in recent theoretical and applied investigations. According to experimental datum, a nonlinear model derived from piecewise linear was used to describe the hysteretic behavior of soil material during compaction. Through choosing proper model parameters, the nonlinear dynamic characteristics are commendably controlled which could represent different compacting stages. Furthermore, the series phase diagram and Poincare section were obtained by simulation. The hysteretic characteristics might be incarnating from periodic vibration to chaotic vibration. Further research proved that reducing the angular frequency of rotation may bring the chaotic vibration coming back to periodic vibration, which provided a good assistance for further study on hysteretic character of soil compaction and man-machine engineering on vibratory compacting system.
Activation Factors and Sliding Mechanism of Ancient Landslide in Huale Coal Mine
Authors: Peng Ji Chao , Wang Song Lin , Lv Peng
Published: October 2014

This paper sets the ancient landslide in Huale coal mine in Guizhou as the research object. The in-situ geological exploration and field survey to determine the nature and activity history of the landslide; By using the methods of drilling and pitting, geology structure characteristics of the ancient landslide could be determined; the sliding surface is obtained by field sampling test, rock and soil physical and mechanical characteristic; Through rationally designed dip tube, the paper repeatedly monitors the underground displacement with the borehole inclinometer, mastered the ancient landslide slip surface sliding depth and the location. On this basis, the paper analyzes the activation factors and sliding mechanism of the ancient landslide. Direct cause of the activation of the ancient landslide is mine industrial site construction of the damage to the front of the ancient landslide. Ancient landslide sliding mechanism of the ancient landslide itself exists the weakness of sliding surface, the front is damaged due to landslide, leads to landslide.
Study on the Development Model of Green Products Based on Concurrent Engineering
Authors: Lou Xi Yin
Published: October 2014

concurrent engineering product development from the beginning of the design requirements, it must consider the various factors in the product life cycle, to shorten product development cycle, improve product quality, reduce the green characteristics of product cost, product realization, enhancing the competition ability of the enterprise purpose. Because in the whole process of product lifecycle highly concurrent engineering station, effect that participants work together, reconstruction of product development process and using advanced design methods, contributes to the technical information, economic information, environmental information, energy and resource information and insurance information of organic integration of each stage in the life cycle of product green design, the realization of green products from a life-cycle perspective. Therefore, the concurrent engineering is the core of the design and development of green products.
To Analyse the Timely Maintenance System Usability by Stochastic Process
Authors: Yuan Zi Hou , Sun Wei , Yuan Yi Chen
Published: October 2014

The producer is very concerned about the probability of the machinery system in working condition at the beginning of the mission. The system should be timely able to be maintained if it is in malfunction. The usability of timely maintenance system is analyzed by stochastic process. Two applied propositions are educed according to the characteristic of timely maintenance system usability by stochastic process. According to propositions, machine should be maintained in time. These conclusions can be referred by personnel of using the machinery.Keywords: random process; maintain usability; probability.System usability is the probability of the system in working condition in the beginning of the mission when the system completes the task in a random time. The system is a timely maintenance system if this system can be maintained in time when it is broken down. The system usability of timely maintenance system relate to time, so it can be analyzed by stochastic process.
Risk Analysis about Operation of UHV Power Grid Operation and Maintenance Based on Security Benchmarks
Authors: Zan Yan Guo , Hou Xue Liang
Published: October 2014

For high risk issues of UHV power grid construction and operation in considering the economic premise, based on the requirements of grid construction security baseline. The various factors affecting the risk is scoring by strict rules. Various factors characteristic index value can be drawn and create a collection of various factors affecting the risk. Then referring to safety baseline of grid construction, the risks that exist in construction and operation of the power grid is determine. According to a number of factors, the risk values is divided into the corresponding level of risk. The different level of risk should take appropriate measures to achieve as much as possible to reduce risk and protect the power grid construction and operation security. Finally, the method is proved to be operability in the context of economic in practice.
Application of RFID in a Flexible Assembly Production Line Based on Tracking Algorithm
Authors: Liu Bing Feng , Li Gang
Published: October 2014

Radio frequency identification (RFID) technology provides a wireless way to detect and recognize objects. By using the RFID reader as a sensor, development of RFID helper object tracking system to track the production situation of a flexible assembly line make tracking application. At the same time, based on the range and without scope of cooperation tracking algorithm, we analysis the system. And in order to achieve the balance of density and cost among the read write device, this paper considers only simple reader and omnidirectional scattering antenna. In order to further improve the production efficiency, we use a particle filter model, in order to further processing tracking result of object, improve tracking precision. We suggest that the tracking system can also predict the operation state of product in assembly production line.
The Influence of Payload Mass and Inertia Properties on a Piloted Flight Simulator Hexapod Dynamic Performance
Authors: Pan Chun Ping , Lu Ying , Lin Yi Jun
Published: October 2014

In order to improve the dynamic performance of a piloted flight simulator hexapod, a study was carried out to quantify the effects of payload mass and inertia properties on hexapod dynamic performance. Based on the Lagrange-Euler formulation, a dynamics model of hexapod parallel mechanism including the payload mass characteristics was built, and then analyzed with the real hexapod through experiments. According to a large amount of experiment datum, the influence of payload mass and inertia properties on a piloted flight simulator hexapod dynamic performance was obtained, and these results are significant for the high speed and high acceleration control of the hexapod mechanism.
Simulation Analysis on Hobbing Process and Heat Treatment of Automotive Transmission Gear Based on the MASTA Software
Authors: Liu Hui Mei , Wan Li Li , Zhang Xiao Hong
Published: October 2014

Based on the MASTA cylindrical gear manufacturing module, the hobbing process and heat treatment of automotive transmission gear were simulated. The simulation results show that the hobbing process has a lot of excellent process characteristics, such as good adaptability, continuous cutting, no extra stroke, higher productivity. By the MASTA software simulation the maximum value of the gear heat treatment deformation is about 70 um. The trend of thermal deformation first increases, then decreases, and then increases.
Flexible Rolling Technology of Spring Steel 60Si2Mn
Authors: Guan Xin , Dong Zhong Qi , Chen Min , Yuan Jian Lu , Fu Jun Wei , Zhang Yan Yan
Published: October 2014

The mechanical properties of 60Si2Mn were investigated with the cooling rate changing under new finishing temperature. Results showed: the mechanical properties of 60Si2Mn plate depend on the finishing temperature and the cooling rate changing. The microstructure of ferrite and pearlitic lamellar is thinning, and sorbitic content and HV increase with the cooling rate increasing under the same finishing temperature.
Dynamic Modeling of an Independent Wheelset Bogie with MapleSim
Authors: Hua Tao , Lu Zheng Gang
Published: October 2014

In order to help researchers better understand the dynamic characteristic of independent wheelset rail vehicles, this article presents a new modeling way to establish an independent wheelset bogie with a white-box dynamic analysis tool-MapleSim. In this article, an independent wheelset model is made firstly. Than based on this wheelset model, an independent wheelset bogie is made. After the modeling, the necessary validation with Simpack is done. The straight line dynamic validation includes the creepage of left and right wheels, the lateral displacements of bogie and both wheelsets’ yaw and lateral displacements. The results are similar to the model with the same parameters in Simpack which reveals that the bogie model in this article is correct and feasible.
Establish the Model of Parameters Optimization of Sheet Metal Forming in Drawing Process Based on Artificial Neural Network
Authors: Zhang Wen Qiong , Li Yong Xian , Wei Wei
Published: October 2014

The paper establishes the objective functional model of sheet metal forming in drawing process with ANN, a mapping between sheet forming parameters and performance evaluation indexes was built, which provides important preferences for researching and optimizing these parameters. It obtains neural network model of high precision through the training of cross experiment method. At last a model was built. According to the test results, the error of the network were less than 5%.That means the network is available, and also it establishes foundation of the process parameters optimization.
Determination of Linear Thermal Transmittance for Corners with Acute Angle
Authors: Vlach František
Published: October 2014

This paper deals with the determination of linear thermal transmittance for buildings with acute angle shapes. Calculation of linear thermal transmittance is a standard problem in determining the influence of thermal bridges on the overall energy performance of buildings. Computational methods are known for ordinary rectangular buildings and the values of typical detail are listed in databases. Current architecture of designs buildings uses acute angle shapes quite frequently. It corresponds with new trends in architecture. In such cases the value of linear thermal transmittance is not accurate for using databases. This paper presents an analysis of the influence of the change of angle of the walls in corner to linear thermal transmittance. It provides information applicable for buildings assessment in engineering practice.
Modeling of Details for Single-Layer Wall in a Passive House: The Case of Balcony Slab
Authors: Rybakova Anna , Kalousek Miloš
Published: October 2014

The balcony is one of the main reasons of the increased heat loss. The presence of thermal bridge in constructions of balcony envelopes influences the energy consumption, durability of the building envelopes, and also the thermal comfort of occupants. If the balcony construction is performed of a metal back slab it would be hardly possible to avoid the formation of a powerful thermal bridge that will go along the whole balcony length. This problem could be solved by using of thermal insulating element for connecting cantilevered steel components to wall. An investigation into the various performance criteria concerning the effectiveness of steel balcony connections to reinforced concrete wall, has been carried out in our article.
Influence of Window on Solar Gains and Daylight Level
Authors: Kalousek Miloš , Mohelníková Jitka
Published: October 2014

Energy savings led to design requirements for buildings with thermally insulated envelopes. Window glazing with better thermal insulation properties have in many cases reduced transmittance of solar radiation. They decrease solar thermal gains and daylight level in buildings. A study of influence of selected windows on solar gains and daylighting in a reference room is presented in the paper.
Underfloor Air Cavity Created from Special Shaped Units and Different Intensity of Outdoor Wind Flow
Authors: Renčko Tomáš , Sedláková Anna
Published: October 2014

Underfloor air cavities are commonly used in connection with remedial treatments of damp masonry, especially in historic buildings, but in new buildings respectively, and further also by the realization of foundation boards, and as a protection against radon. The materials used can be original, but it is also possible to use modern special shaped units. To assessment the airflow in the air cavity the recently often used CFD simulations can be employed. The application of simple geometric models can accurately confirm or refute the appropriateness of a proposed solution. Of the two completed simulations, the first overall geometry of a modeled house, ascertains the actual pressure on the walls due to wind effects. Results from the first simulation are applied as boundary conditions, where the geometric model represents the underfloor air cavity created from special shaped units. The overall geometric models are simulated by a different intensity of outdoor wind flow.
Making the Concept of Old Industrial Buildings in Terms of Sustainability in Architecture
Authors: Ilkovič Ján , Ilkovičová Ľubica
Published: October 2014

Industry since its origin gradually takes typical characteristics which interfere into the economics of a country, it has a specific localisation and its own identity. Nowadays a problematic old industry on one hand creates a potential of lucrative areas in the cities and on the other hand it is itself a carrier of culture and historic values. That is why it is necessary so that the values which it represents are presented to the wide public and not only to a relatively narrow circle of specialists. From the nowadays view, industrial has got a new dimension of equivalence with architectonic sights of modern. The content of article is aimed at methodology of concept creation of changing the objects from potentials of usage of objects, level of adaptability of construction and innovation of original details to determination of alternative procedures.
Emissions of Nanoparticles from Small Combustion Equipment with Regard to the Combustion Mode and Wood Humidity
Authors: Drastichová Vendula , Martiník Lubomír , Horák Jiří , Krpec Kamil , Hopan František , Kubesa Petr
Published: October 2014

Contamination of air by solid particles is serious problem for human health and also environment, especially in certain regions of the Czech Republic and Poland. Small particles in nano-sizes are more dangerous than same weight of larger size. Negative effect namely of the solid particles depends on number, specific surface area, respirability and bonding of others substances (e.g. PAH, As, Cd, Zn, Cu etc.) which are higher for smaller (nano-sizes) particles compared to larger one. With the approaching winter, yearly problems with distribution of particles from small combustion equipments arise. The annual emission balance indicate that the proportion of small sources to total air pollution (PAH, dust) is surprisingly expressive [1]. For this reason mentioned above this contribution deals with measuring of amount, and distribution of nanoparticles produced form combustion of wood in small combustion unit.
For combustion test in grave-free stoves were used three samples of wood (wet spruce, dry spruce and raw spruce) and two combustion modes. Nanoparticles from flue gas were characterized by the aperture low-pressure cascade impactor DLPI (separation and weighing of particles in sizes 30 ηm ÷ 10 µm). Wood were combusted in the form of ¼ logs.
Sustainable Construction Technology Based on Building Modules
Authors: Kozlovská Mária , Kaleja Pavol , Struková Zuzana
Published: October 2014

The aim of the paper is to demonstrate the widely presented benefits of modular construction as compared with traditional construction method. A case study of family house construction by modular building method and traditional method is used to examine the structural, economic and time indicators of individual construction methods. The results are presented in tabular and graphical outputs and are compared each other in regard to different technological parts of the building. The paper provides the comparison of economic and time indicators resulting from budgets and time schedules of construction that are executed for different variants. Such comparison demonstrates exactly the benefits of modular construction. The building based on building modules consisted of steel bearing structure and enveloped by sandwich panels is adopted as the selected modular construction technology. The different variant, applied for comparison of modular and traditional construction, is represented by the building with comparable thermo-technical characteristics, constructed by traditional masonry method.
Multi-Criteria Evaluation of Two Passive Houses in Terms of Sustainability
Authors: Kolář Radim
Published: October 2014

Assessment of building objects including the ones which are referred to as passive, is done solely on the basis of the total energy delivered coming from primary non-renewable energy sources but only for the time being when the evaluated building object is utilized.
The article aims to point out the possibility of a multi-criteria evaluation model while comparing two already functioning passive houses, constructed in the same vicinity. The houses are different in each and every aspect. Are constructed from different building materials and both of them do utilize different types of energy required for their operation.
Measurement and CFD Simulation of Wind-Driven Rain Using Eulerian Multiphase Model
Authors: Juráš Peter
Published: October 2014

This paper deals with measurements of wind-driven rain intensity in Meteorological garden of Slovak hydrometeorological institute and subsequent modelling of free standing wind-driven rain gauge in OpenFoam CFD simulation tool using Eulerian multiphase model instead of common used Langrangian particle tracking model.
Study of the Mechanical Behavior against Horizontal Forces of Self-Supporting Facades
Authors: Cubel Francisco , Roldan Juan , Vercher Jose , Gil Enrique
Published: October 2014

The brick façades are one of the most used façades in the current architecture. This typology is used during centuries, but still relevant today. The conventional way to build a brick façade is supporting the outer sheet on the slabs of the building. In buildings with these conventional façades have appeared stability, insulation and sealing problems.The self-supporting façade appears to solve these problems easily. This type of façade can solve more easily thermal bridges in buildings, which is an optimization of energy consumption. To resist horizontal forces façades need anchors between the two sheets or between the outer sheet and the structure. The current standards in Spain do not define the arrangement of the anchorages between the exterior sheet and the inner sheet of the enclosure. This paper studies the influence of the inner sheet in self-supporting façades. The transmission of horizontal forces between the two sheets of the façade is analyzed in detail, in order to check whether the inner sheet assists in the stability of the outer sheet. Different models of façade have been simulated to compare their results using the finite element method.