bluuebunny/crossref_metadata_2025 huggingface dataset:
Informal Visual Networks
Authors: Heijnen Emiel
Published: January 2014

This chapter explores the characteristics of informal visual networks. The findings of this study offer insights into the informal cultural production and of today’s youth and allows the author to formulate alternative approaches for formal art education practices. He found support for the conclusion that today’s art teacher is part of a world in which visual knowledge and production can be learned in various communities of practice, which are empowered by technology and globalized networks. A formal curriculum that is open to these various communities of practice might be capable of keeping pace with the rise of participatory cultures while remaining meaningful to students. A teacher in such a curriculum is a tour guide at a lively junction where communities of practice of visual professionals and informal visual networks meet.
Conclusion
Authors: Castro Juan Carlos
Published: January 2014

This concluding chapter serves as provocation for thinking about niche online communities as not solely constituted with human actors. It examines the question of how digital code participates with and subtly shapes niche online communities. Learning online is not only a matter of interaction between humans; it also participates with and shapes the code that learns and constructs the conditions in which one learns. Digital code delivers and dictates the content we see and learns from how an individual interacts with others. It is far from egalitarian with content as it amplifies patterns and popularity, which results in homogenous experiences and thinking for users. As a result, educators, designers of online learning environments, and researchers need to take into account the role that digital code plays in the interface it creates in teaching and learning online.
Forecasting Algorithm of Heavy Vehicle Roll over Based on Road Collaborative
Authors: Jing Dong Zhan , Zheng Wei Gang
Published: January 2014

This works through the establishment of model of vehicle model and the road to development based on cooperative system of heavy road vehicles under the condition of the speed side prediction model,for the initiative to prevent heavy semi - trailer rollover risk, improving the reliability of prediction, forecasting, prediction of universality and stability.The driver ahead of access to information that is of potential rollover risk for heavy vehicles rollover warning time for the TTR, in turn, the driver enough time to take appropriate action to avoid a vehicle rollover accident happened.
Production Technology and Key Equipments for Ceramsite Produced from Coal Fly Ash and Clay
Authors: Chen Zuo Bing , Xie Qiang
Published: January 2014

Under the background that solid wastes have been produced and increased continuously, how to change waste into treasure has become an important research topic to achieve sustainable development. Based on a cooperating project with an enterprise, the production technology and key equipments for ceramsite produced from coal fly ash and clay have been studied which is of great significance not only to carry out the industrial solid waste disposal and make best use of resource but also to guide the running of the production line.
Analysis of the Improvement of the Drawing Die in Drawing Device
Authors: Liu Wei , Wang Dong Mei , Liu Gui Hai , Zheng Ze Yu , Jiang Ji Ting
Published: January 2014

Drawing devices, as an important auxiliary equipment, nowadays widely applied in areas such as mechanical installation, machinery manufacturing, machinery repair, but still have problems to fit into the workpiece of larger size and of difform shape. The article presents a new kind of drawing device with a novel drawing die,which not only well solve the problem mentioned but also greatly improve the use efficiency and the use value by analyzing the existing deficiency in drawing devices.
Elasto-Plastic Fracture Analysis of Finite-Width Cracked Stiffened Plate
Authors: Deng Jun Lin , Yang Ping , Dong Qin , Yan Xiang
Published: January 2014

Thispaper adopts the crack line-field method to analyze finite-width stiffenedplates with central through I-type crack under uniaxial tensile loading. Themethod completely abandons the small scale yield hypothesis. The plastic stressand strain fields at crack tips and the plastic-zone length can be accurately determinedby combining with equivalent shear stress of Westergaard stress function in theposition of stiffener. It can be seen from the illustrative example that theresults of the paper agree well with those by finite element method.
Study on the Structures and Surface Forces of Different Carbon Blacks by Atomic Force Microscopy
Authors: Fu Qing Shan , Chen Jian , Yu Zu Xiao , Yang Rui Song
Published: January 2014

Carbon blacks are used universally as fillers in polymer matrix for mechanical, electronical and thermal properties improvement. Plenty of studies show that the structure and surface properties affect the function of carbon blacks in polymer matrix intensively. However, the reinforcing mechanism is still controversial. In this study, we studied the structure of three carbon blacks by Dibutyl phthalate (DBP) absorption and atomic force microscopy (AFM) and analyzed the absorption/desorption forces of the three carbon blacks surface by force-distance curves. The results show that the carbon black with relatively high structure possesses more branches and bigger aggregation morphologies and shows the highest surface absorption/desorption forces, which may increase the reaction between carbon black and polymer matrix.
Mechanism Modeling and Analysis of a Small Unmanned Vehicles Using Vortex Lattice Method
Authors: Zang Xiao Jie , Zhang Zhi Dong , Liu Chang
Published: January 2014

For a certain type of small unmanned aerial vehicles (SUAV), using the vortex lattice method (VLM) estimated the aerodynamic derivatives, establishing linear small-perturbation equations based on level and non-sideslipping flight. Analyzed the static stability and mode characteristics based on the dimensionless derivative and matlab simulation. Early in the design, by mechanism modeling and performance analysis for the UAV through pneumatic calculations could get a lot of valuable reference data of the UAV. This has some practical significance for system performance analysis and flight control system design.
Study of Frequency Conversion Energy-Saving Reconstruction for Central Air-Conditioning
Authors: Hua Hong Yan , Zhang Zhen
Published: January 2014

Water system is one of the significant compositions with large power consumption in air-conditioning equipment. From viewpoint of energy-saving, the variable frequency operational principle of the water system is analyzed, the merits and demerits of operating water system under power frequency or variable frequency are compared, and the control principle of the energy-saving revamping project is introduced. In addition, combining with the specific project, the benefit of energy-saving for the water system is analyzed. The result shows that after revamping, the air-conditioning system runs properly, both the indoor temperature and humidity meet the specifications; the revamping technology offers significant energy-saving effects.
RF Coaxial Open Standard Calibration Technology Research
Authors: Sha Chang Tao , Zhao Fei , Yin Yu Zhe , Kan Jin Song
Published: January 2014

RF impedance is one of the most important parameters of lumped parameter electronic component. In order to ensure the measuring accuracy, it is necessary to calibrate the instruments with impedance standard on a regular basis, which can eliminate uncertainties of the test results. This study focus on the theoretic analysis of the open impedance standard, one of the RF impedance standard kit. Theoretic calculation and measurement is adopted in this study, the calibration of the open standard is finally accomplished with equivalent method and cubic spline interpolation method.
Study on Co-Simulation and Experiment of a Series-Parallel Hybrid Electric Vehicle
Authors: Huang Ding Jian
Published: January 2014

A series-parallel hybrid electric vehicle and its controller are more complicated than conventional vehicle,even a series or parallel hybrid electric vehicle. The HEV test platform is built up to get the engine fuel consumption map.The model of a series-parallel hybrid electric vehicle is established on the platform of the professional simulation software CRUISE,and the controller of the HEV is builded on MATLAB/Simulink.In the end,the results of co-simulation and vehicle experiment verify the validity and feasibility of this method.
Typical Structure Parts Library Design and Research on Machine Tool Fixture
Authors: Zhang Xiao Fen , Cao Yan
Published: January 2014

Based on the Group Technology, Family part technology is adopted for standard part design, as well as parametric driven technology is adopted for non-standard part design, combined with assemble knowledge description and associated driven technology, typical structure parts library is realized by parametric driven assemble parts. For typical structure parts library in machine tool fixture, firstly, multi-classification and key words index is designed for management; secondly, several format files are managed in mapped directory by keywords and meta-data is generated by content description of those files based on analysis constitute of design information; Thirdly, process of making use of library is designed for top-down functional design. Typical structure parts library can maximize reuse the knowledge and parts of fixture design, greatly promote design efficiency.
Virtual Prototyping Simulation of Flexible Multi-Point Auxiliary Support Fixture for Blade Machining
Authors: Cao Yan , Li Jing , Tian Jian Hui , Fan Qing Ming
Published: January 2014

Spatial curved blades have been widely used in major aerospace manufacturers due to their light weight, high structural efficiency, high reliability, etc. However, their processing deformation, processing difficulty, and so on limit their use. In order to deal with the situation, flexible multi-point auxiliary supporting fixture for the processing of spatial curved thin-walled parts has become a major topic of current researches. The layout of positioning and clamping points of the flexible multi-point fixture direct affects the stiffness of clamping positions on the thin-walled parts to be processed. When cutting force is definite at a certain point in machining, the greater the stiffness at the processing positions on the part, the smaller the processing deformation due to the cutting force. Therefore, in order to reduce the machining deformation due to the poor stiffness, a suitable positioning and clamping layout is needed to improve the surface stiffness at the machining positions. Thus, the machining quality of thin-walled parts can be improved.
Research on Torque Control of Brushless DC Motor for Electric Vehicle
Authors: Liu Wei Ze , Wang Wen Long , Tao Bing Quan , Ma Jian Wei
Published: January 2014

The component of drive system for Electric vehicle is analyzed,and torque control strategy of motor is proposed. The design scheme of controller based on brushless direct current motor and dedicated control chip of motor TMS320LF2407A is presented. The main controller and hardware circuits of driving part is designed,and software control program is proposed,The test result shows that the design scheme proposed has high feasibility.
The Detection on Hydraulic of a Certain Type Equipment Based on C8051F020
Authors: Cheng Kan , Li Lin Tao , Lei Lei , Luo Jie
Published: January 2014

For maintenance and support needs of a certain type of equipment, the detection on hydraulic of a certain type equipment Based on C8051F020 as the main control chip was designed. The equipment flexible applies to all port resources of C8051F020, it realized port power control,self-test / measurement controlled driver, LED driver,buzzer driver, solenoid valves driver and rack motor driver via I/O interface, it realized operational process control and display testing results via level conversion chip of SP3223E ,It realized operation training, principles assisted teaching and fault repair in-one simulation training.
Design of High Accuracy Robot Welding Machine for a Cone Bottom
Authors: Tang De Huan , Luo De Yang
Published: January 2014

This paper designed a special welding machine for an aluminum cone bottom workpiece. This machine contains highly accurate positioner system, laser tracking system, and robotic welding devices. It is used to weld the transverse seams and the longitudinal seams of the workpiece. The interaction of welding robot with positioner and the real-time seam correcting can ensure high quality of welding.
Preparation and Characterization of SrAl2O4: Eu2+, Dy3+ Luminescent Nanofibers
Authors: Liu Jia Lin , Zhang Kai Yan , Luo Juo , Chang Yu Ping
Published: January 2014

PVP/[Sr (NO3)2+Al (NO3)3+Eu (NO3)3+Dy (NO3)3] composite nanofibres were prepared by electrospinning technique. SrAl2O4:Eu2+, Dy3+ luminescent nanofibers were synthesized by calcination under a reducing atmosphere at 1100°C. The luminescent nanofibers were characterized by XRD, SEM, FTIR, TG, fluorescence spectrophotometer, respectively. The experimental results showed that the products are with monoclinic SrAl2O4 crystal structure, the diameter of nanofibers is about 100nm and the size is uniformly distributed. The luminescent nanofibers emit bright blue fluorescence of 470nm in wavelength of Eu2+ ion characteristic emission under the excitation of 365nm in wavelength of ultraviolet ray. The position of emission peak exhibit blue shift in some degree compared with that of bulk SrAl2O4:Eu2+, Dy3+.
Research on the Shift Schedule of Dual Clutch Transmission for Pure Electric Vehicle
Authors: Han Peng , Cheng Xiu Sheng , Huang Yi , Gu Qiang , Hu Hua Bin
Published: January 2014

The shift schedule is one of the core contents of main control logic of pure electric vehicle drive control system. With the right shift schedule, the vehicle can obtain good power performance and fuel economy. A shift schedule of dual clutch transmission (DCT) for pure electric vehicle based on powertrain coordination control is presented in this paper. Based on conventional vehicle shift schedule, the DCT shift schedule of pure electric vehicle drive system with powertrain coordination control is analyzed in detail. In order to verify the effectiveness of the shift schedule, some simulations are carried out. The results show the shift schedule of dual clutch transmission for pure electric vehicle based on powertrain coordination control can improve the vehicle power performance.
The Effect of Elastic Pre-Bending on the Laser Peen Forming of 2024-T351 Aluminum Alloy Plate
Authors: Chen Lei , Hu Yong Xiang , Fang Gang , Yao Zhen Qiang , Zheng Xing Wei
Published: January 2014

Laser peen forming, is a purely mechanical forming method achieved through the use of laser energy to form metal plate with small curvatures. Experiments were performed to investigate the effect of pre-bending on the plate bending deformation induced by laser peen forming. The pre-bending of plate was accomplished by a fixture with the cambered top surface. The pre-bending curvature radius is calculated and is used to design cambered surface. The LPF experiments are performed with Nd: YAG laser with overlapping laser spots. It is found that the convex deformation can be induced after laser shocks. And its curvature radius in the elastically elongated direction can be greatly increased by applying pre-bending, while in the perpendicular direction, the curvature radius is decreased.
Parameter Matching and Performance Simulation for a Distributed Power Extended-Range Electric Vehicle
Authors: Wang Da , Song Chuan Xue , Song Shi Xin
Published: January 2014

In order to solve the problem of low power-mass-ratio and high curb-weight in existing extended-range electric vehicle, this paper proposed a distributed power design, and calculated the powertrain parameters of this design, which was based on a commercially available extended-range electric vehicle. Through parameter calculation and simulation, this design was proved to significantly lower the curb weight and manufacturing cost of an extended range electric vehicle, and improve the efficiency of regenerative braking at the same time, finally lead to longer mileage.
Self-Adaptive PID Control of Hydraulic Quadruped Robot
Authors: Chang Kai , Han Xiao Jian , Yang Yong
Published: January 2014

Servo hydraulic system is important one of driving patterns of quadruped robot. While servo hydraulic system has characteristics of parameters time-varying and strong nonlinearity, so traditional PID control pattern cannot meet all the control demands well. To solve these problems, a set of control hardware is designed for a quadruped robot and a new control algorithm which can adjust PID parameters in real-time condition based on fuzzy control theory is proposed. By deducing transfer function, establishing system model and using MATLAB simulation tools to simulate the two algorithms, we compared the two algorithms and the simulation result turns out that compared with traditional PID control algorithm, the fuzzy PID control algorithm has features such as low overshoot, high stability precision, strong robustness. At the same time, the result turns out that the fuzzy PID control algorithm is much fitter for the joint control of quadruped robot.
Research Gravity Compensation for Master Manipulator with Time Delay
Authors: Wang Hong Min , Du Zhi Jiang , Zhao Zhi Kai , Liu Rong Qiang
Published: January 2014

A gravity compensation algorithm for master manipulator used in minimally invasive robot surgery is proposed in this paper. The Lagrange dynamic equation is used to solve the motor output torque for balancing the master gravity. To avoid time delay in signal processing, multi-thread and multi-event technology are used in software control system. With the algorithm, the force by hand is very small under the condition of exist gravity compensation, less output more than 90% of the external force compared with the lack of gravity compensation.
Analysis of Low-Cycle Fatigue Crack Growth for Stiffened Plate Based on Accumulative Plastic Strain
Authors: Deng Jun Lin , Yang Ping , Dong Qin , Wang Hong
Published: January 2014

The propagation rate of low cycle fatigue and life expectancy for stiffened plates are analyzed by using local average strain amplitude at crack tip as the basic parameter. The crack propagation is considered as the result of local material separation in the plastic zone of crack tip, which is not a continuous process but an intermittent alternating process of strain accumulation. From the point of view, the analysis is performed and the results are well compared with those from Finite element method.
FPGA-Based High Precision and Low EMI Switching Power Supply Design
Authors: Zhang Shao Rong , Li Zhi , Zhu Ai Jun
Published: January 2014

We analyze the reasons why DC-DC switching power supply generates the electromagnetic interference (EMI), and through the FPGA control the digital-to-analog converter (DAC) to output the pulse width modulation (PWM) signal with high precision and slew rate controlled, the slew rates of the voltage and current of external N-channel MOSFET are controlled. So, dv/dt and di/dt can be decreased in the circuit; and the ripple noise and EMI of switching power supply are reduced vastly in this way. Experimental results show that the ripple noise of switching power supply could be reduced by 80% and EMI reduced 15dBμV. The experiment has proved that we can cut down the ripple noise and EMI of switching power supply by lessening the slew rates of the voltage and current of MOSFET switching tube.
An Ultrasonic Micro Scalpel Based on Exponential Horn Silicon Chip
Authors: Wang Ting Ting , Wang Jian Yan , Zhang Wei Qun , Guo Hang
Published: January 2014

This paper proposes a silicon-based ultrasonic scalpel for minimally invasive surgery. Starting from the fundamental theory, the micro ultrasonic scalpel based on exponential silicon horn chip is analyzed and designed in detail. Then a micro scalpel has been fabricated by using MEMS technology and tested. Results show that the micro ultrasonic scalpel presented in the paper has a good performance in vibration and fit for cutting biological tissues at the micro/nanoscale.
Research on Technology of High-Pressure Water Jet Incremental Sheet Metal Forming
Authors: Li Hao , Yang Xiao Ping
Published: January 2014

Water jet incremental sheet metal forming (WJISMF) is a new technology of sheet metal forming , a five-axis forming machine tool was designed ,with regard to research in this area is still in its infancy. Plenty of experiments was designed to study how to choose the reasonable molding process parameters. In addition, a spiral track instead of a contour track to solve the problem of surface depression was presented, and an example of processing was given to verify the advantages of the spiral track. Details of the use of UGCAM to generate spiral trajectory are descriped, the method is of universal significance. In addition, a vertical wall cylinder is formed through multi-step forming.
Design of Intelligent Transmission System for Mining Belt-Conveyor Group
Authors: Deng San Peng , Wang Xin Yong , Qi Yu Ming , Wang Chun Ming , Sun Kang
Published: January 2014

£oBased on PLC, ARM and CAN bus technology, the intelligent transmission system is invented, which can be used to transfer the safety production monitoring data and audio data of belt conveyor group. It is able to effectively solve the problems in transmitting voice information clearly, collecting and managing multi-sensor information over dozens of kilometers along the transport fleet about the conveyor group monitoring systems. Its application in industry field shows that it effectively raises the belt conveyor system level of remote intelligent monitoring and emergency safety integrated protection.
Visualized Modeling and Simulation of Manufacturing Execution System in Dynamic Job-Shop Scheduling
Authors: Cao Yan , Jia Li Wei , Cao Sen , Bai Yu
Published: January 2014

Manufacturing Execution System (MES) is a job-shop production oriented management information system and the bridge between production plan management layer and job-shop control layer in an enterprise. Job-shop scheduling is the core module of MES, which direct affects the efficiency of production and management in the enterprise. According to the characteristics of discrete production management, a job-shop production scheduling system is presented that adapts to multi-variety small-batch production. A MES architecture for dynamic discrete production and its core modules are presented. Then, dynamic job-shop production scheduling problem is visually modeled and simulated based on Witness to realize optimal resource deployment.
The Design of New Automatic Loading Control System
Authors: Ding Guo Bao , Huo Zhi Song , Lu Gui You , Zhu Rui
Published: January 2014

Aim at work process complications, high break down incidence rate and break down diagnosis difficulty of current automatic loading control system, this text designed a set of new automatic loading control system which combined the advantage of the Rough Set - Neural Network to diagnose the automatic loading system.The system used LPC2294 as main control chip and additional other function units to complete hardware electric circuit design and software procedure exploit development of automatic loading system.The system made use of VS2008 to design the place of honor machine to show interface and passed the correspondence of a string of completion place of honor machine and control system, this system automatically packed to fill system to provide a new way of thinking at present for improvement.
A Pearl Automatic Sorting System Based on Image Identification
Authors: Bai Zhen Lin , Wen Qin Run , Yang Mei
Published: January 2014

This paper introduces a pearl automatic sorting system. The design conforms to the national condition of our country. With the use of pearl automatic sorting system, automatic sorting instead of the cumbersome manual sorting workers. It uses computer image processing technology and numerical control technology. It has a positive effect to guarantee product quality. And it can improve the market competitiveness of enterprises.
Development of Control System for MRS Groundwater Exploration Instrument Based on Ethernet
Authors: Wu Da , Duan Qing Ming , Huang Ting Zhe , Zhang Lei , Han Ying Jie , Shi Jun Wei
Published: January 2014

The control system for Magnetic Resonance Sounding (MRS) groundwater exploration instrument was developed on the platform of LabVIEW. This system consists of transmission and reception sections. The former transmits current, controls power and acquires current and the latter controls amplifier, acquires MRS signals. In order to improve efficiency of data transmission, Ethernet based on TCP/IP is used in the system. Furthermore, the system has additional functions of pulse moment setting, equipment detection, data processing into pictures and data storage. Through outdoor experiments, it is found that the average error is less than 2%. The experimental results demonstrate the effectiveness and correctness of the system.
Developing a Communication between Calibration Tool and Electronic Control Unit Based on CCP Protocol
Authors: Wang Wen Jun , Gong Yuan Ming , Ma Yu
Published: January 2014

In the stage of the calibration of electronic control unit of automobile controller, the traditional method needs to connect the calibration tool to the real ECU, which requires high calibration environment. In order to avoid dependence on the real ECU, this paper, through the introduction of the working principle of the communication way of CCP protocol and message format, uses CANoe, which is the product of German company Vector for bus simulation, to develop ECU simulator. In that way, we can realize the calibration of virtual ECU by calibration tool online and improve the efficiency of calibration system development.
The Design of Environmental Temperature and Humidity Remote Monitoring System Based on AT89S52 MCU
Authors: Li Hai Xia , Zeng Jie Hui
Published: January 2014

The AT89S52 MCU is the central core of the system which combined with external circuit modules for data processing. Under the stable supply of 5v DC power, the each module can be initialized by MCU, through the serial port communication technology for data exchange. The single serial bus interface technology is used to obtain DHT11 temperature and humidity sensor testing data in the system. Through the MCU data processing, the detected data will be compared with the alarm data which is given by the users. When a given range is exceeded by the detected data, the sound and light alarm is triggered, moreover, temperature and humidity control is performed. Compared with the LCD1602, the advantage of the temperature and humidity remote monitoring system are the simple structure of the circuit, work stability, accuracy and fully suitable for the need of temperature and humidity monitoring system in human living environment.
Design and Application of Energy Monitoring System Based on Serial Port Server and B/S Framework Configuration
Authors: Leng Jian Wei , Fu Xiang Lian
Published: January 2014

Data acquisition card or Daisy chain serial model are widely used in energy monitoring system, but there are still problems to be solved such as the unity of data specification and performance of real time is not high. We proposed that using signal conversion module to unified signal, using serial port servers to achieve standard Modbus RTU protocol to TCP/IP protocol conversion, supplemented by optical fiber transmission to collect data. Thus realizing the unity of data acquisition specifications and improving the data transfer rate and real-time performance, also solving the problems of points dispersion, distance is too long and can not eliminate interference.
The Research on Fault Diagnosis System of Shimmer Sight Based on Image Analysis
Authors: Yu Zheng Lin , Wu Han Fei , Song Qing
Published: January 2014

In view of the traditional optical inspection mode which relies on artificial visual, single parameter and single gage, in this paper, we get a new method to diagnose the fault of Shimmer Sight based on image analysis. Preprocess the image collected by CCD through digital image processing technology, and determine automatically the fault of Shimmer Sight by fault recognition mode. The new method implements the integration, digitization, and has the characteristics of flexible extension testing, which adapts to the requirements to test optics and optical performance parameters for new weapons and high-tech engineering.
The MMVC for the Nth Order Linear Discrete-Time Systems under Prospective Strong Intervention
Authors: Wang Qiu Ju , Gai Ru Dong
Published: January 2014

This paper is devoted to the issue of the modified minimal variance control (MMVC)for the nth linear discrete-time systems under prospective strong intervention (PSI). At fist, establish the Nth order linear discrete time system model. Based on the research of the first-order linear discrete time systems under PSI with the constraint of minimal variance control, the algorithm is extended to the nth order linear discrete time systems, so one can get MMVC of the nth order linear discrete-time systems with constraint under PSI and by introducing two parameters to proof.
Two Axes Micromouse PWM Generator Based on FPGA
Authors: Zhang Hao Ming , Peh Lian Soon , Wang Ying Hai
Published: January 2014

This document explains and demonstrates how to design two axes micromouse PWM generator based on FPGA, the top module based on FPGA is divided into Motor Control module, address decoder, mux output and bi-directional buffer module. Simulation results of every module illustrate the design can be very good to meet the fast exploration and dashing requirements of micromouse.
Enhanced Hydrolysis of Hemicellulose in Corn Stalk by Alkali Pretreatment
Authors: Guo Yan Quan , Wang Wen Bo , Kong Fan Gong , Wang Shou Juan
Published: January 2014

Alkali hydrolysis was used as a method of decomposing hemicellulose in corn stalk in this paper. The effects of NaOH concentration, hydrolysis time and hydrolysis temperature in the pretreatment on the degradation of hemicellulose in corn stalk were investigated. In addition, the yields of reducing-sugar and alkali hydrolysis corn stalk were discussed. The experimental results showed that the process of alkali hydrolysis had positive effect on the removal of hemicellulose in corn stalk and the whole process almost finished in 3h. The maximum reducing-sugar yield was 7.2% by the pretreatment with 20% NaOH for 6 h at 90°C, and 6.6% under the condition of 15% NaOH for 3h at 90°C, which was slightly lower than the maximum reducing-sugar yield, but the alkali charge and hydrolysis time dramatically reduced. So it was clarified that the best pretreatment condition was 15% NaOH for 3h at 90°C, and also this method is easy to applied in the alkaline pulping process.
A Fast Approach for SLCA in Keyword Query over XML Document
Authors: Wan Li Yong
Published: January 2014

Query evaluation and query semantics in the XML keyword query, has an important role, which directly affect the performance of XML query. This paper proposes a fast approach for SLCA in keyword query over XML document,which can judge the information of relevant nodes by means of self-definition to document nods type.This method can solve the problems of no significance of node information query results of the XKSearch algorithm, and compared with XSeek algorithm, it has high efficiency in the query time consumed for the returned results. Experiments show that this method is more efficient in query time and quality of keywords query.
Formation Model of Enterprise Information Capability Research Based on Information Behavior
Authors: Xu Liang , Zhou Ling
Published: January 2014

This article innovatively puts forward that in the research of Chinese enterprise information practice, the construction of enterprise information capability should be combined with the enterprise information behavior. Firstly, on the basis of other scholars studies at home and abroad, the concept model of enterprise information capability is proposed; Secondly, the enterprise information behavior is divided into three types, the user, the IT staff and the organization information behavior, then the mechanism of how enterprise Information behavior acts on the formation of information capacity during life cycle of information system (IS) is discussed, at last the formation model of the enterprise information capability is brought forward.
Research on XML Data Structural-Integrity in XML Signature
Authors: Chen Hua , Liu Nian , Liu Bao Long , Luo Man Te
Published: January 2014

With the extensive application of XML, especially in e-commerce field, XML data security has become the focus of people, which particularly shows in its structural attack specific to the location relation to elements in tree structure. Combined with the characteristics of tree structure of XML data as well as the basic features of traversing binary tree, the paper proposes a method to protect the structural-integrity of XML digital signature, so as to protect XML data element from structural attack through the basic features of traversing binary tree, and ensure the absolute location relationship among elements.
Research on Recommendation Algorithm in Social Networks
Authors: Tang Hu Xin , Qian Xu
Published: January 2014

Research status and development of the recommendation system are studied, the focus of evaluation of recommender system and recommender system based on social network in two aspects, and puts forward some improved algorithm, and achieved certain results. KDD Cup 2012 Track data for the simulation experiments on the correlation algorithm based on search engine, has been shown in different positions on the relative attractiveness of advertising, numerical user. At the same time, rapid calculation of the degree of correlation between a user and other users of an algorithm is given, and then quickly given the recommendation results. KDD Cup 2012 Track data for the simulation experiment of the algorithm, and the analysis result is given.
Using Single Image Parallelepipeds for Camera Calibration
Authors: Tian Ye , Wang Zhen Wei , Chen Feng
Published: January 2014

Human vision is generally regarded as a complicated process from feeling to consciousness. In other words, it refers to a projection form 3-D object to 2-D image, as well as a cognition of real objects according to 2-D image,The process that a real object is modeled through some images is called 3-D reconstruction. Presently, camera calibration attracts many researchers, and it includes the internal parameters and the external parameters, such as coordinate of main point, parameters of rotation and translation. Some researchers have pointed out that parallelepiped has a strict topological structure and geometric constraints. Therefore, it is suitable for the self-calibration of camera. This paper briefly explains parallelepiped methodsand tries to apply this method to deal with self-calibration. The experiments show that this method is flexible and available. image.
Numerical Simulation on the Process of Al-Alloy Air Cushion Continuous Casting
Authors: Huang Yan Lu , Zhang Yu Min
Published: January 2014

According to the characteristics of solidification process of air cushion continuous casting, and on the basis of continuum model for binary solid-liquid phase change system, a set of equations which include continuity, momentum conservation, energy conservation and solute conservation ones are established. Furthermore, a coupled solution method of the set of equations, in which controlled-volume finite difference method is used and developed. The effects of some typical parameters such as billet diameter, casting speed and the second cooling on the solidification behavior are studied, and some meaningful results, which are significant to the technique optimizing of the air cushion continuous casting, are obtained.
LED Chip Electrode Positioning Based on Machine Vision
Authors: Yan Xiao Qing
Published: January 2014

The paper mainly studies the automatic positioning system of LED chip electrode based on machine vision technology, The main idea is taking, analysis and processing the LED chip images through the machine vision technology, and accurately finding the LED chip electrodes and their coordinates, then sending the coordinate informations to the servo control system to achieve precise positioning the LED chip electrodes. This paper focuses on the identification and coarse positioning of the LED chip, the precise positioning of the LED chip electrodes and analysis of image matching accuracy
Electronic Textbook: Concept, Functional Analysis and its Problem of Construction
Authors: Luo Ying , Zhang Xiang Qing
Published: January 2014

With the popularity of information technology, the application of electronic teaching materials will become the trend of development in the future. This paper first defines the concept of electronic textbooks, and then analyzes its features. Finally, the problems related to electronic textbooks are studied.
DCT-Based Digital Image Steganography
Authors: Zhou Jia Min , Pan Yang , Yang Ren Er
Published: January 2014

In order to solve the security problem of the multimedia in the communication process, steganography plays a vital role. In this paper, the DCT domain of digital image steganography is to study the impact of image quality with different embedding positions, the secret information in the DCT domain of an image, different carrier images and the amount of information. Studies show that: embedding the information in the low frequency part of the image, selecting the image with the rich distribution pixel value, is conducive to improve the steganography effects of the information in the image, enhance the concealment of the secret information.
Recognition Analysis of Wood Flour Mesh Number Based on External Rectangle Fitting Algorithm
Authors: Ren Hong E , Liu Mian , Zhu Meng
Published: January 2014

To overcome disadvantages of traditional detection methods of wood flour mesh number, a mesh number recognition algorithm based on external rectangle fitting and morphological characteristics has been studied. It makes use of minimum external rectangle with the boundary points obtained by the preprocessing of microscopic images. The external rectangles length is calculated when the area is the smallest. The experimental results demonstrate that the proposed algorithm has a good fitting accuracy and meets producing demands.
The Wearability Research of New Environmentally Friendly Acrylic Fiber
Authors: Zhang San Xing , Zheng Yi Nan , Li Yan Qing , Xu Hai Bin , Zhang Hong Xia , Zhu Cheng Yan
Published: January 2014

The subject of interwoven fabric for trial used new environment acrylic fiber with different fiber materials. The warp thread of fabric has two groups, one group of 111.1dtex/36 polyester and the other group of 194.88dtex/ polyester/ rayon (80/20). Weft of raw materials can be categorized to seven kinds of blended yarn. A total of 24 experimental small sample trials were tested. 6 wear ability analyses of breathable, anti-wrinkle, anti-pilling, drape, stiffness and warmth of fabric were done. And reached some conclusions.
EEG Feature Extraction Based on Wavelet Decomposition
Authors: Hu Jian Feng , Mu Zhen Dong , Yin Jing Hai
Published: January 2014

Wavelet decomposition is a commonly used tool, signal analysis using the wavelet decomposition, can put the source according to their demand is decomposed into different frequency signals, so as to provide convenience for the feature extraction and identification in this paper, the EEG signals, using the theory of wavelet decomposition is calculated, look from the calculation results, the wavelet decomposition can be used for feature extraction of EEG signals as well.
Real-Time Bidding Based on MooTools without Refreshing Page
Authors: Sun Lei , Zeng Yan , Xing Hong Mei
Published: January 2014

The link of bidding is the key to large quantities of goods and materials purchasing of the railway. To meet the requirements of the procurement bidding, both sides are required to complete the process of bidding, consultation, and evaluation within the set time online synchronously. This paper introduces the real-time bidding based on MooTools without page refreshed.
Automatically Extracting University Scholar Names Information and Classification
Authors: Su Chang , Jia Wen Qiang , Shang Feng Jun
Published: January 2014

High-tech talent is one of the important social resources such as energy and material, and introducing high-tech talent is an important strategy for the development of national science and technology. To extract high-tech talent information of variety research fields from massive websites. Firstly, we study the principles of Web crawler and Web data Extraction in the paper. Then taking the U.S universities as an example, we propose an intelligent method and procedure which can extract scholars name information from websites. Finally, we apply a classification algorithm to identify Chinese scholars working at overseas and verify the validity of the method in the experimental system. The accuracy of the classification algorithm is higher than 90%, the average accuracy of result information is higher than 77%.
Research on Delay-Tolerant Network and Increasing Probability of Opportunistic Communication
Authors: Liu Hao Qiang , Zhao Shu Wen , Shang Jun
Published: January 2014

At present, Internet has brought a lot of benefits to people. In most situations, it has an excellent performance. It requires a continuous end to end network for providing a reliable delivery. However, in reality, there is a challenged network which is discontinuous with high delay and many interruptions. In these cases, conventional network performs poorly or cannot be available. Delay-Tolerant Network (DTN) is an emerging area which is used to solve the problems in that challenged network. As its name described, it can handle or tolerant high delay which could lead to a disconnection that may be many hours or many days. It introduces a bundle protocol and uses a mechanism of store and forward to implement a hop to hop network which can operate in the discontinuous environment. It is used in terrestrial civilian networks, military wireless networks and outer space networks which have a high delay. The reference implementation has been developed by Delay-Tolerant Network Research Group (DTNRG). It implements a mature architecture of DTN and provides almost complete functions on Linux operating system. Later, the Bytewalla project implements part of DTN architecture and functions on Android operating systems. It is defective and there is much space to improve it. This research concerns that the Bluetooth convergence layer increases the probability of communication based on DTN.
The Research and Construction of National Grid ERP Knowledge Management System
Authors: Wang Qi
Published: January 2014

A lot of domestic and international researches show that the effective management of knowledge has become a powerful way to improve the performance and success in many enterprises. Power concerns a countrys economy and its peoples livelihood so that knowledge management has been widespread concern in the power grid enterprises development and application. On April 29, 2007 , the State Grid Corporation decided to adopt enterprise resource planning (ERP) systems as the core information technology platform and principal means for the informatization construction. In order to improve the efficiency of knowledge dissemination in National Grid ERP and make all the ERP modules theoretical knowledge to be shared, consulted and applied quickly among all he ERP users, this subject was based on the core ideas and characteristics of ERP in Hebei Electric Power Corporation, combined with its use problem of ERP to analyze specifically on the system requirements, functional design, build programs , feasibility and innovation, used ASP.NET and other technologies to achieve the construction of national grid ERP knowledge management system, and provide a knowledge management system (KMS) for quickly accessing, learning and sharing knowledge. It has great practical value.
Study on Measuring Methods of Self-Physical Simulation to Radar Performance
Authors: Sun Qing , Sun Yong , Zhou Guo An
Published: January 2014

Self-physical simulation technique has been increasingly extensive used in measuring and evaluating the performance of weapon systems. Based on the characteristics of self-physical simulation, measuring methods of this technique to radar range and coordinates tracking accuracy of radar targets have been discussed in this paper, and which lays certain foundations for performance evaluation of weapon system.
Research on Medical Information Cross-Regional Integration Scheme
Authors: Sun Ying , Chen Jing , Song Jian
Published: January 2014

Cross-regional medical information sharing is a research hotspot in the field of current regional health informatization. This paper put forward a system architecture based on IHE-XDS (Integrating Healthcare Enterprise-Cross Enterprise Document Sharing) technology framework, meeting the requirements of ebXML (Electronic Business using eXtensible Markup Language) and distributed access to patient medical documents, and completed the document registration inquiry services and achieved document sharing by studying the mapping relationships between IHE-XDS and ebXML information models.
Design of Polytechnic College Practice Training Base Management System Based on Internet of Things
Authors: Zhang Zhen , Cheng Cheng
Published: January 2014

Practice training base is the main place for students to practice and also the significant organizations where universities do high level basic research and basic application research. Current situation and problem of practice and training lab management in college is introduced, such as the problems of equipments managements and class arrangement. To analyze the improvement areas of existing lab management practice, design the management platform of practice and training lab basing on Internet of things, using the modern management methods to improve advanced management skills of practice and training lab in polytechnic colleges. Taking internet of things and the characteristics of college into consideration, customized architecture of internet of things is discussed. Prototype of internet of things based management system is proposed. The sensor layer, network layer, support layer and application layer are constructed. Trend of practice and training lab management system and challenges faced are also briefed. Results: Through trial run in some colleges, designed internet of things based lab management system can achieve what is desired by college of polytechnic instrumentation on lab management system and work flow. High efficiency, simple operation, and powerful functions are also proven at the same time.
Experimental Study of FPCA on its Generalization Performance in Image Classification
Authors: Huang Ke Wang
Published: January 2014

The theoretical study of FPCA shows that FPCA algorithm has better generalization performance than existing PCA and its extended algorithms. But this theoretic conclusion was not confirmed by existing experimental results because of the problems of evaluation criterion. Introducing the idea of clustering performance criterion of LDA, we proposed a general performance metrics for PCA and performed numbers of experimental studies to compare FPCA with existing PCA and its extended algorithms by using our metrics. We found in the feature extraction of image samples that FPCA really has better generalization performance than existing PCA and its extended algorithms under the condition of large sample size. The results confirmed theoretical conclusion of FPCA and improved relevant experimental study.