bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Remote Sensing Technology in Investigating Tourism Resources
Authors: Ye Zhang Huang , Cao Ying Chun , Yan Qiang , Guo Fu Sheng
Published: May 2014

As a significant technological means of collecting global statistics and its changing information, remote sensing technology plays a critically important role in the investigation of territorial resources. Therefore, using remote sensing technology to interpret the tourism resources of Danxia landform can make up for many shortages of traditional methods so as to do less for more. In this article, the tourism resources of Danxia landform in Jiangxi province are extracted by remote sensing technology and its average area error is reduced to 11% through the statistics data. It can be concluded that it is feasible to investigate the tourism resources of Danxia landform by means of computer automatic identification and classification.
Low Carbon Scenarios Vs. Clean Coal Scenarios in China: How to close the Carbon Gap?
Authors: Chen Qian , Rennings Klaus
Published: May 2014

The first question addressed by this paper is how the development of coal power in China meshes with the country’s official low carbon policy. The paper then examines the implications of this development for climate and energy policy. There are three possible options for reconciling the gap between coal-power expansion plans and CO2 reduction scenarios: First, reduction targets could be scaled back such that targets are achieved at a later date than currently foreseen. A second option would be to make use of more advanced coal technologies. As shown in this paper, however, the second option is quite expensive and would only have a moderate impact on CO2 emissions. A third option is the introduction of carbon capture and storage (CCS). This paper concludes that climate policy in China will likely be a process of small and incremental steps, with emissions reductions taking probably longer than currently forecasted. Even if CCS technology is introduced in the next two decades, absolute reductions in CO2 emissions can first be expected after 2030.
Research to the Central Heating Boiler Room Energy Saving Index Evaluation System
Authors: Qi Jun Feng , Xiong Xiao Ping
Published: May 2014

This passage put forward two kinds of energy saving evaluation methods for the central heating boiler room: qualitative and quantitative index. And give reference weights for each indicator. Base on the two kinds of index evaluation method to get final boiler energy saving level. The establishment of the energy saving index evaluation system played an important role in the energy saving reconstruction of the central heating boiler in northern area.
Experiment of Two Models of Hypoxia Training, and their Influence on Rats’ Cardiovascular System
Authors: Liu Wei
Published: May 2014

This template o observe the influence of living high-training low (Hilo) and intermittent hypoxia training (IHT) on the rats’ cardiovascular system. Male SD rats are randomly divided into four group. The training groups begin to receive training 3 times a week for a total of 4 weeks, incrementing the training load every week. After the experiments, every group is further divided into three groups as quiet group slaughtered,immediately and 3h group slaughtered and tested for their normal blood index and bemodynamic parameters. Both types of hypoxia training can improve the function of rats’ cardiovascular system, and IHT has greater influence on the improvement of rats’ heart function than Hilo.
A Study on an Evaluation Method of a Rehabilitation Robot Based on Fuzzy Comprehensive Evaluation
Authors: Chen Lei , Yang Chang Niu , Huang Wen Quan , Sun Ze Gang , Liu Yu Cong
Published: May 2014

To solve the rehabilitation evaluation problem of rehabilitation training, a rehabilitation evaluation method based on fuzzy comprehensive evaluation was presented for 6-DOF wearable lower limb rehabilitation robot. Relative degradation degree was introduced to represent the transformation of the actual state of rehabilitation training and the very poor rehabilitation. On the basis, Rehabilitation evaluation model was built based on fuzzy comprehensive evaluation, each layer of which was evaluated respectively, and suggests rehabilitation evaluation results of a lower limb rehabilitation robot. The instance analysis shows that the method is reasonable and effective.
Research on Chinese Population Aging Speed Based on the ARMA Model
Authors: Fan Ying Bing , Wang Guo Xian , Sun Li Na
Published: May 2014

China is a country with millions of people. Population aging is one of the important factors restricting the sustainable development of Chinese economy. In this paper, using the Chinese population density data, we established the ARMA model to make predictions and analysis for Chinese population growth trends and age structure changes, that provide a scientific theory for the government to develop the relevant policies.
Design and Development of DC Motor Speed Control System Based on ARM
Authors: Liu Dong Xiang
Published: May 2014

With the continuous development of embedded technology and its application in the field of industrial control and more and more people's attention, and play an important role. With ARM processors as controllers, including human-computer interaction interface, DC power unit and its driver modules, load and drive modules section. ARM controller by a/d sampling speed to get the error signal, and then after a certain algorithm, by d/a converter to control DC motors, so as to achieve the purpose of controlling the speed. In addition, ARM controllers can also be set through the d/a converter load to facilitate research of DC motor speed control system of static and dynamic characteristics in different load. Research and development of DC servo motor control system based on ARM core of DC servo motor control is a relatively new field, is one of the control of DC servo motor trend.
Design of Steam Heated Drying Line-Finned Tubes
Authors: Kang Wen Jin , Peng De Qi
Published: May 2014

This article describes how to build an efficient steam heating system heat warped tube models. And steam heating fin tube geometry was optimized in this paper. Steam heating for drying is very important to enhance heat pipe heat transfer system..
Application of Computer System in the Study of Sociology
Authors: Xu Ying Ming , Jin Shu Juan
Published: May 2014

With the development of information technology, more and more data about social to be collected. If we can analyze them effectively, it will help people to understand sociological understanding, promoting the development of social science. But the increasing amount of data and analysis to put forward a huge challenge. Now the social networks have already surpassed the processing ability of the original analysis means, must use a more effective tool to complete the analysis task. The computer as a way of helping people from massive data to find the potential useful knowledge tools, play an important role in many fields. Social network analysis, also known as link mining, refers to the handling of the relationship between social network data in the computer method. In this paper, the methods of computer and the social network analysis was introduced in this paper and the computer algorithms are summarized in the application of social network analysis.
Simulation on the Flow Field of Centrifugal Pump Based on Fluent
Authors: Guo An Fu , Wang Tong , Jiang Ting Ting , Hu Yun Ping , Zhang Da Jiang
Published: May 2014

In this paper, the software Fluent was employed and the two-dimensional flow fields, such as flow distribution, velocity distribution, pressure distribution, turbulent kinetic energy distribution are obtained. The results show that the flow, velocity, pressure and turbulent kinetic energy distribution are significantly different and asymmetric. The results have referenced significance for design and analysis of the Centrifugal Pump.
Research on the Enterprise Network from IPv4 to IPv6 Transition
Authors: Han Xiao Ya , Zhang Qian , Jin Jian Zhong
Published: May 2014

As IPv4 address resource being exhausted, the transition from IPv4 to IPv6 is urgent. According to the status of the enterprise network, IPv6 forwarding performance and IPv6 transition technology of the enterprise network equipment was tested. Furthermore, IPv6 transition principles and process for the enterprise network were presented on this basis. In the transition program the cost, complexity, technology maturity and transition smoothness was taken into account. Test results and IPv6 transition program provide a reference for other enterprise network transition process.
The Current Situation and Development Trend of Trunking Mobile Communication System
Authors: Yang Guang Long , Wang Xiao , Tan Xue Zhi
Published: May 2014

This article interprets the current development status of trunking mobile communication system at home and abroad, makes a detailed analysis of the two existing architectures of trunking technology, introduces the demand of digital trunking broadband in China on the basis of the analysis on current situation and development trend of trunking mobile communication system. It also presents two types of domestic technical scheme in combination with the features of broadband trunking mobile communication systemr abstract.
Design of Non-Lethal Ammunition Combat Simulation
Authors: Lu Ling , Hu Ji Wen
Published: May 2014

In this paper, the virtual reality technology and its hardware and software development platforms are introduced. Focus on the characteristic of non-lethal ammunition, it elaborates on the design ideas, system structure, key technology of developing virtual operation and training system with tools. The system provides a new experimental platform for the armed forces to handle emergency events as it simulates a more realistic battlefield situation.
A New Simple Channel Simulator Based on FPGA
Authors: Yu Liu , Chen Lei Cheng , Li Ming , Wang Peng Rui
Published: May 2014

Through detailed research on the channel modeling, this paper proposes a new simple channel model to solve the difficult of the complex theory and long time design cycle modeling such as SCM, SCME and the WINNERII models. This paper has constructed the mathematical model, and then simulated and analyzed it based on the Matlab, and finally realized the channel simulator based on FPGA. After that, through the comparison and analysis, we can guarantee the practicability and reliability of this simulator.
Studies on the Geometric and Electronic Structures of SiC Polytypes
Authors: Zhang Fu Chun , Zhong Xian Hui , Ruan Xing Xiang , Zhang Wei Hu
Published: May 2014

SiC poly-type geometric structure, electronic structure and energy have been subjected to systematic study based on first principle calculation method given in density functional theory. After calculation, the energy results show that 4H-SiC system energy is the lowest and stablest, while 2H-SiC system energy is the highest and unstablest; the calculation results of the band structure show that six SiC poly-types are indirect wide band gap semiconductor, with valence band top on point Γ of Brillouin zone, conduction band bottom on point M of Brillouin zone; with the increase of hexagonality, the energy gap and valence band width are gradually getting smaller, with largest splitting of orbital energy level on 2H-SiC valence band top, reaching to 0.122 eV, while the splitting of orbital energy level on 8H-SiC valence band top is the smallest, with 0.027 eV only.
An Android 4.2 Set-Top Box Realizes Video Sharing by Miracast
Authors: Yang Mei Ling , Zeng Hao
Published: May 2014

Since published, the Android 4.2 has received a great deal of attention. Relative to the Android 4.1, the Android 4.2 adds many new features. Supporting Wi-Fi Display is one of the new features added in the display part of Android 4.2. Wi-Fi Display means Video sharing realization by Miracast. The paper about a method realized video sharing by Miracast based on Android4.2 Set-top box. First of all, introduced the development background and the concept of the Miracast; then, particularly introduced the way of video sharing based on Android 4.2 Set-top box; finally, discussed the future development prospect of Miracast.
Research and Design of Digital Museum Based on Virtual Reality
Authors: Wang Ru Guang , Dong Huai Lin , Wu Min Wen , Wu Qing Feng
Published: May 2014

Digital museum is an important trend in the development of museums in recent years, and virtual reality technology in the digital museum is one of the most important issues in museum construction and it has broad development prospects. This paper aims to research into two kinds of key virtual reality technologies: image-based 360 degree panoramic display and 3D modeling technology, exploring various kinds of virtual museums based on these two technologies. It discusses the advantages and limitations of the various kinds of VDMs and proposes the design of the Virtual Museum based on 360 - degree panorama, web 3D technology and 3D modeling technology. And its application in the design of Xiamen Overseas Chinese Museum has obtained good results.
Data Mining and its Application in Animal Husbandry Management System
Authors: Wang Hui , Li Xiao Ge , Liu Tai Yu , Wu Qian
Published: May 2014

Data will be an important resource, including Animal Husbandry, including many of the industry, and even determine the success or failure of an industry. Animal Husbandry management is the behavior of large amount of data, improve the management level of all walks of life requires a lot of long-term data analysis and preparation. The rapid development of China's Animal Husbandry ,but the level of information to stay in the primary stage, the further development of Animal Husbandry, the information necessary to overcome this problem. In this paper, data mining, data warehouse and other new technologies in Animal Husbandry management, large-scale farming, and the government has brought the latest regional regulatory and other management tools and data analysis for the industry to promote mining.
The Simulation Research of Classic Spectrum Estimation Periodogram Method Based on Matlab
Authors: Su Bo Ni , Xie Hong , Hua Xi Yao
Published: May 2014

The spectrum estimation is a main content of modern signal processing, it is very important for random signal detection and analysis. This paper researched the classical spectrum estimation method, simulated the periodogram method, Barlett method, and Welch method of power spectrum estimation, then mainly discussed the spectral resolution about different length of data, also discussed the resolution of the spectral estimation and the performance of variance in the different way.
Research on Regional Innovation Capability Based on BP Neural Network
Authors: Gao Ya Qun
Published: May 2014

The region innovation system has provided the network platform for the knowledge dissemination and the flowing, simultaneously in the region the high-tech industry colony's knowledge overflow promoted the knowledge in region sharing, becomes the region innovation the driving force. This article has constructed the region innovation system life cycle model based on the baud life cycle theory, has studied under the knowledge economy condition the high-tech industry colony knowledge overflow to the region innovation system different life cycle influence mechanism.
Numerical Simulation of Ventilation Characteristics in a Hydropower Station Spillway Tunnel with High Head and Large Discharge
Authors: Zhang Hong Qing , Lou Yi Long , Xing Wei Ping , Tan Jun Jun
Published: May 2014

High wind speedandloudnoise usually occur in the hydropower station spillway tunnel, which will impact the producing environment of operators. In this paper, turbulent model and VOF modelwere combinedto simulate wind speed and the volume of ventilated airin ventilation holeandthreeaeratorsin the spillway tunnel on the right bank of a hydropower station in China. The results show thatVOF modelcan well simulate ventilated air induced by water drag, andthe volume of ventilated air in ventilation hole is the largest.Wind speed distribution on the longitudinal sectionof the inlet of ventilation hole is non-uniform,and loud noisewill occurthere. Wind speed on the left side of three aerators is higher than that on the right side. The results of the volume of ventilated airin threeaerators simulated by VOF modelare credible, but we should improve the VOF model to more accurately simulate aerated flow.
Canonical Correlation Analysis on Fusion of Global and Local Features of Face Recognition
Authors: Xiong Xiao , Hao Guo Fa , Zhong Peng
Published: May 2014

Face recognition belongs to the important content of the biometric identification, which is a important method in research of image processing and pattern recognition. It can effectively overcome the traditional authentication defects Through the facial recognition technology. At present, face recognition under ideal state research made some achievements, but the changes in light, shade, expression, posture changes the interference factors such as face recognition is still exist many problems. For this, put forward the integration of global and local features of face recognition research. Practice has proved that through the effective integration of global features and local characteristics, build based on global features and local features fusion face recognition system, can improve the recognition rate of face recognition, face recognition application benefit.
Analysis on the Situation of China’s E-Commerce Logistics
Authors: Hou Xiu Fang
Published: May 2014

E-commerce is a kind of new commercial economic mode. Along with the development and promotion of e-commerce, the logistics problem has gradually become the bottleneck restricting the further development. Main problems existed in the current development of China’s e-commerce logistics are analyzed, and the corresponding countermeasures to improve the e-commerce logistics are proposed in the paper.
Evaluation of Capability of Weapon System of Systems Based on Multi-Scenario
Authors: Zhang Shu Teng , Dou Ya Jie , Zhao Qing Song
Published: May 2014

The capability planning is a fundamental task when designing a Weapon System of Systems (WSOS). Uncertainties exist when building WSOS. It is difficult to select the most appropriate alternatives under the background of system operations. The programming of capability of WSOS is a multi-criteria decision-making problem. To resolve this problem, a scenario-based multi-criteria decision-making methodology is proposed. Scenario describes the future situation may occur, and also presents the uncertainty of reality. In this paper, scenario was modeled by the key variables in which experts and stakeholders are interested. TOPSIS was also improved based on multiple scenarios. Finally, the method is validated by an example of armored weapon systems.
Forestry Investment and Output Value of Forestry in China
Authors: Gao Yang , Hou Yi Lei , Zhao Zheng , Wen Ya Li
Published: May 2014

The relationship between output value of forestry and forestry investment is considered as an imperative issue in forestry economy. In this paper, Granger causality tests are applied to examine the causal relationship between the output value of forestry and the forestry investment for China during 1998 to 2012. Empirical evidence reveals forestry investment and output value of forestry are co-integrated and there is unidirectional causality running from forestry investment to the output value of forestry but not vice versa. With the purpose of conquering the lack of forestry investment, government need to speed up the finance expenditure on forestry, to expand sources of forestry investment and to improve efficiency of investment.
Study on the Performance Evaluation System of Human Resource Management Department
Authors: Jie Xie
Published: May 2014

This research attempts to apply the mean of video-feedback to the technology training of volleyball by means of the advanced video recording equipment, on the basis of multimedia technology, valuing the content, time frequency of feedback, to discuss effectiveness in volleyball’s training, this paper plans to improve the volleyball’s training methods and training quality, so as to provide a new thinking and theoretical basis. A comparison experiment is done and the result shows that 1 The training mean of video-feedback has played a certain role in improving students’ technical movement and mastering, enhancing the quality of training. It gave a full play the advantage of modern multimedia technology, advanced means, new approaches, and it can fully arouses student’s study enthusiasm, to make up for the deficiency of the traditional training method, in accordance with the time and the demand of social development.
The Construction of Human Anatomy Library of Open PBL Case
Authors: Peng Zhang , Liang Ji , Lei Shen
Published: May 2014

PBL (Problem-Based Learning) method is to problem for based of a method, teaching process in the teachers boot students based on specific problem read information, and organization discussion, eventually boot students to analysis problem and settlement problem; in human anatomy teaching in the application PBL method, change has traditional teaching means, enhanced has students of learning consciousness and sense, improve has students multi cognitive and overall thinking capacity, in students of active participation in the training they of team spirit At the same time flexible application of modern information technology, improving organizational communication skills; The proper application of PBL teaching theory to teaching human anatomy to improve student interest in learning, improve teaching effectiveness, and lay a solid foundation for the future of PBL teaching other courses.
From Aerobics Training and Competitions to see the Status of Development of Aerobics in China and Countermeasures
Authors: Zhang An Hong
Published: May 2014

Gymnastics State Sports General Administration of Sports Management Center, China aerobics aerobics association is to promote the development of China's leader, will organize a lot of aerobics training and competition. Through literature analysis, interviews, and other mathematical statistics from its recent training, content and object and change the game, analyzes the development status quo aerobics, proposed countermeasures against the problem.
Application of Multimedia Technology in Sports Test
Authors: Ge Shu Lin , Xu Xiao Lei , Dai Wen
Published: May 2014

With the development of economy and the progress of the society, computer multimedia technology emerges, as the times require. Computer multimedia enrich people's lives. For us, it not only provides a better visual experience and auditory enjoyment , but also plays an supporting role powerfully in solving the complicated work . The purpose of this paper is to study the application of multimedia technology in sports test and to explore the significance of promoting sports fair by multimedia technology.
Papermaking Wastewater Treatment - A Brief Review
Authors: Zhao Li Juan , Zhang Yong Feng , Hong Jian Feng , Tu Wei Wei
Published: May 2014

Papermaking industry generates a considerable amount of wastewater including varieties of pollutants. This paper reviews the ordinary processes of treating papermaking wastewater, and introduces the merits and demerits of these processes. The latest technologies are summed up. A forecast is made through all the methods in recent years. The waste to waste process is particularly promising because of its remarkable economic and environmental benefits.
Research on Navigation-Obstruction with Complex Boundary and its Counter Measures in Middle Reaches of the Yangtze River
Authors: Liu Lin , Zhang Ming , Liu Feng Yang
Published: May 2014

Channel characteristics in the middle and lower reaches of Yangtze river were complicated and changing, which showed up as mainstream swing frequently, staggered beach moving down significantly, delta and channel change dviolently.etc. In this paper, navigation-obstruction in the Jiepai Reach in the middle reach of the Yangtze River and its countermeasures were discussed based on the analysis of the historical riverbed evolution of the Jiepai reach. The Jiepai Reach is characterized by a frequent sway of mainstream, significant moving down of the intersectional point bar, and drastic changes between main channel and floodplain. Navigation-obstruction in the Jiepai Reach can be described as follows: the dredged channel location is very unstable, leading to the navigation obstruction of refloating in the frequent transition between the left and the right branch. Besides, the frequent sway of mainstream causes different levels of damages to the existing regulating structures. These problems can mainly be attributed to the unstable and less controlled distribution of the Jiepai reach between main channel and floodplain. The general idea of regulating the Jiepai reach is: based on the existing projects, according to the facilitating pattern of main channel and floodplain during the river evolution, appropriate engineering measures can be taken to gradually form efficient patterns between main channel and floodplain phase by phase, which will improve the navigation conditions. In the early stage, bar protection engineering should be implemented in the transition section the low shallow beach, which controls an appropriate location of the transition section, and promotes the formation of a stable transition channel. In the later stage, according to the adjustment of the channel, dam and bar protection structures can be applied in the control engineering of the upper point bar and beaches above Luoshan. Model test results showed that the implementation of the project could produce sound regulation effects, and efficiently improve the navigation conditions.
The Treatment of Copper-Containing Wastewater by Electrolysis-Enhanced Micro-Electrolysis Fluidized Bed Method
Authors: Zhan Qiang , Xu Xiao Jun , Zhao Jing , Li Tian Guo
Published: May 2014

The effect of electrolysis-enhanced micro-electrolysis fluidized bed technology on treating cooper-containing wastewater had been systematic researched. Operation conditions including applied flow rate, voltage, solution pH and reaction time on the copper ions (Cu2+) removal effect, had been studied scanning electron microscope (SEM) analysis had been used to characterize the surface features of copper crystals in the fillers surface. The results show that the Cu2+ mainly removed by electrochemical deposition, the optimum operation conditions are: flow rate is 22mm/s, voltage is 12V, initial pH=4, the response time of 30 min.
Management Technology and Practice of University Library under Open Environment
Authors: Wang Qin
Published: May 2014

With the development of times, science and technology is changing peoples ideology, pursuit of knowledge even the reading habits. This is both an opportunity and a challenge for university libraries. The opportunity lies in the advantage on collecting books of university libraries whose rich books is the foundation and prerequisite for people to satisfy their pursuit of knowledge, and the challenge is the impact of network media that the peoples changes in reading habits and reading modes has lad that the closed university libraries cant meet the needs of reading. Opening the resources of university libraries and expanding the reading ways have become the only way of the reform and development of university library work for readers. This paper firstly introduces the connotation of university library work for readers, expounds the aim and problems of university library work for readers, and analyzes that under open environment, how to improve the service quality and level of the service work in university libraries.
Optimization Research on English Teaching under Network Environment
Authors: Zhu Li Yan
Published: May 2014

With the rapid development of information technology, using computers to assist English teaching has become an important method. The advanced network technology can optimize English teaching mode, improve English teaching quality, meet the personalized requirements of English learners and improve students’ English application ability. This article introduces the system structure of English network teaching. On the basis of this structure, the optimization principles and methods of English teaching under network environment are analyzed. The optimization principles mainly include the most optimization principle, the compatibility principle, the personalized teaching principle, the autonomous learning principle and the interactivity principle. The optimization methods include the optimization of teachers and students.
The Application of Multimedia Network Technology in Production Practice for Foreign Language
Authors: Mo Jiang Yan
Published: May 2014

As same as the production practice in engineering, the foreign language can also realize the unification of the educational and productive. Through studying the application of multimedia network technology in foreign language training, this paper analyses the present status of the production training in foreign language in-depth, to design the multimedia network course meeting the requirements of the foreign language training. So as to improve the students’ foreign language professional ability and practical ability, stimulate the interest in learning, it promotes the benign development of the foreign language teaching, having profound significance.
Research on Durability Design of Concrete Structure under Chloride Environment
Authors: Zhang Ke Feng
Published: May 2014

For concrete structure durability increasingly highlight of problem, focus description has chlorine ion on concrete structure of erosion mechanism, and invaded model and effects factors, derivation out integrated consider concrete of chlorine ion combines capacity, and chlorine ion proliferation coefficient of time dependence, and concrete structure micro-defects effects and the mixed coagulation s performance of practical proliferation equation, established has for forecast concrete using life of chlorine ion proliferation theory model, made intends built structure in chlorine ion environment Xia durability design thought and design method, Perfected design theory of durability of concrete and carbonation model design based on Carbonation depth of concrete during the period, compared with the concrete cover thickness, for engineering design and revision of the specification reference.
Study on the Deformation Mechanism of the Wangxia Unstable Rock Mass in the Three Gorges Reservoir
Authors: Le Qi Lang , Gao You Long , Zhang Zhong Lin , Guo Ning
Published: May 2014

Twice serious deformation occurred in the Wangxia unstable rock mass in 2010 and 2011 in Wushan country in the Three Gorges Reservoir. It formed a large dangerous factor for the local resident and channel safety. Based on the detailed investigation of the new cracks, deformation history, GPS observations, total station monitoring and crack displacement monitoring data analysis, analyzed comprehensively the deformation and reasons of the unstable rock. The researches show that the deformation type of the unstable rock mass contains gradual change and mutation, should adopt the corresponding monitoring methods and monitoring frequency in different deformation stages based on the geological survey and monitoring the key parts of the unstable rock mass. The destruction of the Wangxia unstable rock was a gradual process, controlled by 5 key cracks, which were crack T11, T12, T13, T16, and T10, consider the Wangxia unstable rock was subsided extrusion type collapse.
The Water Conservancy Water Electricity Construction Engineering Professional Result Analysis of Application Base on C4.5 Algorithm
Authors: Yong Hu
Published: May 2014

Aimed at the student the result problem, give student the result data scoops out the model. The decision tree method is a very valid classification method, in the data that scoop out. According to student the result data characteristics, adopted the C4.5 decision tree algorithm. C4.5 algorithm is the improvement algorithm of the decision trees core algorithm ID3, it construct in brief, the speed compare quickly, easy realization. Selection decision belongs to sex, scoop out the result enunciation, that algorithm can be right to get student the result data classification, and some worthy conclusion, provide the decision the analysis.
Calculation and Characteristics Analysis of Lithium Ion Batteries’ Internal Resistance Using HPPC Test
Authors: Zhang Hua , Mu Hai Wei , Zhang Yong , Han Jian
Published: May 2014

Internal resistance of battery can really reflect its own characteristics, which including health status of the battery, inconsistency, state of charge, thermal runaway. Method to calculate the internal resistance of the battery using HPPC (Hybrid Pulse Power Characterization) test which proposed by the FreedomCAR is introduced. Ohmic resistance, polarization resistance, discharge resistance and regen resistance are calculated based on MATLAB programming using HPPC test. The differences between the four kinds of internal resistance of lithium ion batteries are compared. Characteristics of the four kinds of internal resistance in charged-state and discharged-state are analyzed.
The Analysis of Single Bus-Bar Connection and its Switching Operation
Authors: Chen Peng , Chen Xin Ru , Liu Yu Qian , Liu Zhi Shuan , Chen Xin Ru , Jiang Xin Qin
Published: May 2014

Main electrical wiring is a circuit diagram which is used to meet the production needs of the power transmission and distribution and in accordance with a certain manner and order and use provisions of graphic symbols and text code to connect once equipment (generator transformer switching equipment,etc.) together. It reflects the basic structure and function of traction substations and substation (power generation). In operation, it shows the primary operating mode of substation (power generation) and high voltage grid connection and associated feeder devices and become the basis of controlling and scheduling apparatus. This paper analyzes single-bus connection from the reliability, flexibility and economy point of view, then outlined the typical single-bus wiring switching operation principles and methods.
Characterization and Bioactivity of Ti-6Al-4V Alloy Dental Implant Surface Treated by SLA Technique
Authors: Luo Sheng Lei , Yang Zhan Hua , Lin Ming , Xu Xin , Zhang Yan Hui , Guo Bin , Dong Li Li
Published: May 2014

Superior quality dental implant surface was achieved by an air-isolation technique of sand-blasted, large-grit, acid-etched (SLA) treatment. The experiment was conducted in an air-isolation conditions of sand-blasting and acid-etching. The surface microstructures, chemical compositions, and bioactive properties of treated Ti-6Al-4V implants were examined using scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and simulated body fluid (SBF) immersion test. Research results revealed that the air-isolation SLA (A-SLA) treated implant, which was coated with SBF thin liquid film and sandblasted for 20 s, exhibited better hydroxyapatite (HA)-inducing ability owing to its favorable wettability.
Wind Power Short-Term Forcasting of BP Neural Network Based on the Small-World Optimization
Authors: Zhao Xin , Wang Shuang Xin
Published: May 2014

Wind power short-term forcasting of BP neural network based on the small-world optimization is proposed. First, the initial data collected from wind farm are revised, and the unreasonable data are found out and revised. Second, the small-world optimization BP neural network model is proposed, and the model is used on the prediction method of wind speed and wind direction, and the prediction method of power. Finally, by simulation analysis, the NMAE and NRMSE of the power method are smaller than those of the wind speed and wind direction method when the wind power data of one hour later are predicted. When the power method are used to forecast the data one hour later, NMAE is 5.39% and NRMSE is 6.98%.
Technology of Operations on Devices in a Virtual Aircraft Cabin
Authors: Zhang Zhi Chun , Wang Wei Ren , Xu Wen , Qi Li Jun , Zhang Wei
Published: May 2014

This paper focuses on the manual operations on the virtual cabin devices of a flight simulator developed by virtual reality technology. The system consists of the space positioning system, the data glove, the three-dimensional head-mounted display, the left and right eye stereoscopic imaging computers, the space positioning computer, and the main simulation computer. The hand position, attitude, and shape data are measured through the space positioning system and the data glove while the aircraft position and attitude are calculated through the aircraft simulation system. The hand model is represented by the hand position, attitude, rotation angles of fingers, the key points in the hand and the movement directions of these points .The virtual devices are modeled with object-oriented method encapsulating device shapes, operation status, the hand key points and their movement directions that are affective on the device shapes and operation status. The aircraft attitude is overlaid with the hand attitude in order to regard the moving cabin as static. Thus the coordinate transformations are confined to only the hand model and the device models that operation status changed to avoid the large amount of coordinate transformations and reduce the system time consumption. The application result shows that the virtual operation algorithm has a high efficiency, and the operation precision meets the need of system performance.
The Design of CAN Bus Communication System Based on MCP2515 and S3C2440
Authors: Liu Jin Mei , Wang Jun Hong , Sun Dong Hui
Published: May 2014

CAN bus was widely used in embedded system development, but most embedded processors without CAN bus controller, need to extend external CAN bus interface through external bus. In order to send and receive the CAN bus data by S3C2440 chip, interface function of S3C2440 was extended by MCP2515 chip in the paper, which was used the SPI interface to extend CAN bus interface. The design of CAN bus hardware interface was described in the paper. The design of CAN device drive program on the embedded Linux operating system was specified in detail.
Application of Calcium Carbonate in Resin Transfer Molding Process
Authors: de Oliveira Iran Rodrigues , Amico Sandro Campos , Barcella R. , de Lima Antônio Gilson Barbosa
Published: May 2014

Resin Transfer Molding (RTM) is one of the most widely known composite manufacturing techniques of the liquid molding family, being extensively studied and used to obtain advanced composite materials comprised of fibers embedded in a thermoset polymer matrix. Nowadays, RTM is used by many industrial sectors such as automotive, aerospace, civil and sporting equipment. Therefore, the objective of this study is to verify the effect of calcium carbonate mixed in resin in the RTM process. Several rectilinear infiltration experiments were conducted using glass fiber mat molded in a RTM system with cavity dimensions of 320 x 150 x 3.6 mm, room temperature, maximum injection pressure 0.202 bar and different content of CaCO3 (10 and 40%) with particle size of 75μm. The results show that the use of filled resin with CaCO3 influences the preform impregnation during the RTM molding, changing the filling time and flow from position, however it is possible to make the composite with a good quality and low cost.
Multiobjective Optimization of Single Point Incremental Forming: Comparison between Isotropic and Combined Hardening Behavior
Authors: Arfa Henia , Bahloul Riadh , Belhadjsalah Hedi
Published: May 2014

Single point incremental forming (SPIF) of sheet metal is a promising process to produce small batch production and prototyping. This process consists of a controlled process of displacement performed on a three-axis CNC milling machine. In former work, the most critical factors which affected single point incremental forming process were found to be formed shape, tool size, material type, material thickness and incremental step size. The present work is focused on an optimization strategy of (SPIF) process determined by a numerical study based on finite element analyses (FEA) according to a Box-Behnken Design of Experiments. Two types of hardening behaviour laws of material are used: isotropic and combined isotropic-kinematic hardening behaviour. To do so, a set of numerical simulations are carried out for an aluminum truncated cone as geometry of a benchmark model. The simulation results include some decisions about the mechanical resistance and geometrical quality of the parts such as the thickness distribution and the magnitude of springback. In this paper, the main objective is to present an overview of multiobjective design optimization of process parameters in single point incremental forming operation in order to minimize the sheet thinning rate and the springback simultaneously. In this investigation, the steps of optimization procedure include the using of Box-Behnken experimental design for sample producing, response surface model for coarse fitting and a developed Multiobjective Genetic Algorithm (MOGA) for exact solving of fitness functions. The results show that these methods are able to determine all the best possible compromise with respect several antagonistic objectives as well as generate the approximate Pareto optimal solutions. So these will make it possible to choose the appropriate process parameters according to the objectives functions to be minimized and consequently the improvement of the products formed by the process of incremental forming.
Forming Limit Extension of High-Strength Steels in Bending Processes
Authors: El Budamusi Mohamed , Weinrich Andres , Becker Chrstioph , Chatti Sami , Tekkaya A. Erman
Published: May 2014

Bending is a commonly used forming technology in metal forming. The occurring springback and low forming limits of high-strength steels especially during air bending are the main disadvantages. In this paper, the conventional air bending process is applied with a hydrostatic pressure in the bending zone. This was done using an elastomer tool. The advantage of this method is that the flexibility of air bending is maintained by reducing the springback while the forming limits are extended. Furthermore, different geometries for the elastomer tool were investigated by means of a FEM simulation. The investigation leads to a reduction of the process forces by minimizing the springback and to an extension of the forming limits.
On the Flow Stress Model Selection for Finite Element Simulations of Machining of Ti6Al4V
Authors: Imbrogno Stano , Rotella Giovanna , Umbrello Domenico
Published: May 2014

Numerical simulation of machining processes represents a promising tool able to reproduce the cutting conditions without the need to perform a large number of experimental tests. In order to obtain reliable results from the finite element method simulation, is then necessary to properly set up the simulation conditions and to implement the most suitable materials behavior according to the real workpiece characteristics. These data are available in commercial softwares libraries but often they have difficulties to properly represent the machined workpiece behavior. Thus, advanced model are implemented in the software to improve the simulations performance and to obtain realistic results. In this work, the more suitable materials flow stress, within those proposed in literature, is sought to simulate the machining process of Ti6Al4V. The results of the simulations have been compared with those obtained experimentally in terms of temperature, chip morphology and cutting force. The results confirm the need to properly select the materials flow stress model according to the physical sample.
A Discontinuous Galerkin Method for Multiphysics Welding Simulations
Authors: Cagnone Jean Sébastien , Hillewaert Koen , Poletz Nicolas
Published: May 2014

This paper describes the development of a multiphysics welding simulation model based on the discontinuous Galerkin (DG) finite-element method. Our numerical model implements a classical enthalpy-porosity constitutive law accounting for hydrodynamic and thermal effects occurring during the phase transition from solid to liquid metal. The objective of the study is to present the verification of our numerical framework and explore the applicability of the DG formulation to the simulation of welding processes. Three computational examples of increasing complexity are presented.
Methods for the Numerical Modelling of the Adhesive Interlayer of Sandwich-Sheets in Case of Coupled Thermo-Mechanical FE-Analysis
Authors: Engel Bernd , Brühmann Jasmin
Published: May 2014

Bending of multilayered sheets like lightweight sandwich sheets or fiber reinforced thermoplastics is dominated by the mechanism of interply-slip. FE-analysis is performed to predict defects depending on this mechanism. The shear and damage behavior of the adhesive layer of sandwich sheets can be modeled by cohesive elements in Abaqus. Forming simulation of fiber reinforced thermoplastics requires coupled thermo-mechanical analysis methods due to temperature dependence. For this, alternative modeling strategies for the inner layer of adhesive or polymer matrices will be tested in this paper that are able to transfer heat. The layer will be presented by solid elements with enriched property definitions or viscoplasticity. Furthermore the thickness of the layer will be neglected and replaced by contact formulations or spring elements.
Characterizations of STF-Treated Aramid Fabrics Using Picture Frame Test
Authors: Ahn Hyun Chul , Na Won Jin , Han Sung Jin , Harrison Philip , Park Jong Kyoo , Jeong Euig Yung , Yu Woong Ryeol
Published: May 2014

Shear thickening fluid (STF) is a non-Newtonian fluid featuring the increased viscosity upon high strain rate applied. Recently, STF-treated aramid fabrics have been researched to enhance the bulletproof efficiency maintaining the lightweight, however their shear properties including tow shearing, which significantly contribute to the bulletproof properties, have not been characterized, in particular under high shear strain rates. In this study, the shear properties of STF-treated aramid fabrics are characterized using a picture frame test. For this purpose, STF is prepared using polyethylene glycol and silica colloids and coated onto aramid fabrics. Varying the shear strain rate by controlling the pulling speed of the picture frame, the effect of STF on the shear properties of the aramid fabric is investigated. Finally, the shear properties of STF-treated aramid fabrics are predicted a multi-scale energy model and compared with the experiments. This prediction is then extended to cover such a high strain-rate situation as the bullet impacts, enabling to determine the mechanism behind the improved bulletproof performance of the STF-treated fabric.
Isothermal Multisection Tooling for the Automated Preforming of Carbon Fiber Composite Structures
Authors: Nezami Farbod Nosrat , Gereke Thomas , Cherif Chokri
Published: May 2014

In order to decrease CO2 emissions caused by individual transport, fibre-reinforced composite materials are used to reduce vehicle weight and thus fuel consumption. Low productivity of current processes complicates the introduction of fibre-reinforced materials to high volume series, where weight reduction would have a large impact. This paper presents an experimental preforming environment designed to take into account diverse process requirements of different binder systems and a new tooling concept. By setting different temperature levels on the moulds in areas where the material is drawn in under the blank holders and inside the cavity, prebonding of the fabric plies can be avoided and quality of the preforms is improved. Moreover, cycle time can be reduced as no heating or cooling of the tools is necessary.