bluuebunny/crossref_metadata_2025 huggingface dataset:
A Genetic Algorithm with Weight-Based Encoding for One-Dimensional Bin Packing Problem
Authors: Lin Yao Tang , Hou Jia Li
Published: June 2012

This paper proposes a specialized genetic algorithm (GA) based on an expended relational representation named weight-based encoding for solving one-dimensional bin packing problem (BPP-1). The encoding provides a totally constraint-handling scheme to address general and specific constraints, while naturally eliminates redundancy and infeasibility of previous representations for BPP-1. The current study performs experiments for solving some problem instances from a benchmark data set by our specific coded genetic algorithm with one-point, two-point and grouping crossovers. Experimental results show that the proposed methodology works well for solving BPP-1 and performs well on experimented benchmark instances. In addition, the results also show that two-point and grouping crossovers work better than one-point crossover in our experiments.
Preparation and Properties of Cerium Conversion Coatings on the Surface of Aluminum Alloy LY12
Authors: Xia Cheng Bao , Ge Wen Jun , Yang Hou Chuan
Published: June 2012

In order to improve the repairing quality of aircraft envelope of the aluminum alloy LY12， the cerium conversion coating technology was studied by using the surface modification technique. Principle experiment was on the basis of aviation repair technological requirement, refers to the related technique, through examination of corrosion resistance and wear resistance performance of cerium conversion coating, the principal composition of the formula for making cerium conversion coating:Ce(NO3)3 + KMnO4+ Ce-1 (chemical additive), In order to determine each composition of the formula and the technology parameters scientifically, L9(34) orthogonal testing method was adopted, and the formula of surface modification solution was optimized, the technological conditions for making cerium conversion coating on the surface of aircraft envelope were determined. Results of corrosion resistance and wear resistance of the cerium conversion coating on the surface of the aluminum alloy LY12 aircraft envelope obtained by the new technology showed: 1. On the given test conditions, the best content of each chemical composition in the formula of modification solution for making cerium conversion coating on the surface were: l.Ce(NO3)3：14g/L,KMnO4：1g/L,addictive Ce-1:0.3g/L；Main technology parameters were ：pH=1.5～2.7;temperature：20°C；time:15~25 min.；2. Under the same test condition, the corrosion resistance of surface of the cerium conversion coating obtained in test modification solution was better than Alodine 1001 obtained from Bombardier Corporation of Canada, and can meet the repairing demands of Aircraft Envelope.
Water-Resistant Modification of Desulphurization Gypsum Block
Authors: Mu Yan , Fu Ying Li , Zhao Feng Qing
Published: June 2012

A high performance water resistance agent KD-3 prepared from OPC cement, fly ash, slag and additives was used for the modification of hemi-hydrate desulphurization gypsum. Various factors on gypsum block were investigated. The prepared gypsum block possesses excellent water-resistance, good operating property and high mechanical strength. The optimized results was obtained: calcined gypsum 74.9%, KD-3 25%, retarder 0.1%, curing temperature 60°C and curing time 16h.
Preparation and Characterization of Unsaturated Polyester/Graphite Nanosheets Composites under Electric Field
Authors: Zhang Hong Yan , Tai Xi Shi , Wang Hai Quan
Published: June 2012

As a conductive fillers, graphite nanosheets can be induced by the AC electric field in unsaturated polyester resin and then prepared oriented unsaturated polyester resin/graphite nanosheets composite. We investigate the preparation, configuration and capability of the unsaturated resin/ graphite nanosheets conductive composites and the oriented theory of the graphite nanosheets induced in the electric field. The measures and observation of scanning electron microscopy(SEM), X-ray diffraction(XRD), electric current have shown that the graphite nanosheets are oriented by electric field which were randomly dispersed in the polymer matrix at the beginning, and then oriented with their flakes along the electric field in the polyester resin.
Study on Effect of Particle Size of Iron on Properties of Pure Iron Sintered
Authors: Yang Yu Fang , Zhang Jing Yao
Published: June 2012

The effect of particle size of iron on properties of pure iron sintered was studied systematically by the specimen current direct heating dynamic hot press sintering. It is found that mechanical properties of pure iron sintered decreased with the increasing particle size of iron. This is because big particle size of iron leads to big grain in microstructure of pure iron sintered.
The Influence of Paper's Whiteness and Smoothness on Colorimetric Effects
Authors: Bao Guan Xiao , Jiang Wen Yan
Published: June 2012

By experimental methods, the influence of paper's properties on solid ink density and color reproduction results of digital prints was investigated, and different printing requirements on paper surface properties are analyzed. Different categories of paper were used, of which whiteness and smoothness was analyzed firstly, and then were output by same test target. Result shows that the paper's properties will impact on print quality to some extent, different paper should be taken for different images. The results of this paper has some practical guidance for printing companies, which can be used to research the printability of printing inks and papers, optimize printing process, improve printing quality, and provide method of standardization of process control.
Recognizability and Controlling Technology of Submicron Particles
Authors: Zhu Tao , Li Hai Rong , Wan Yan Dong , Chen Sha , Liu Hai Bing
Published: June 2012

In view of the toxicology and hazardous nature of the submicron particles, it is paid more and more attentions of the domestic and foreign research scholars. In this paper, we introduce the research progress on recognition, attributed and formation mechanism of submicron particles in the world. Simultaneously, the controlling technologies of submicron particles are discussed. The application tendency and the existence problems of the controlling technologies are analyzed. At last, the future research directions are put forward for submicron particles control.
LabVIEW-Based Data Acquisition System for Loom Performance Assessment
Authors: Zhang Fa , Wu Li Wei , Luan Kun
Published: June 2012

In order to improve the efficiency of the test system for loom performance assessment, a new data acquisition system of loom performance based on LabVIEW was developed according to direct memory access (DMA) transfer method. Through given hardware components and tested on a Toyata air-jet loom, the different signals were collected and transferred to computer. Then these signals were processed and the test parameters could be reckoned and shown on the PC screen by special designed software program. The result showed that this virtual test system can satisfy the requirement of loom measurement.
The Study of Quality Monitoring and Control for Laser Cutting Based on Pulse-Induced Acoustic Sound
Authors: Hao Hui Juan , Cheng Guang He , Xu Ji Yong
Published: June 2012

In this paper, the pulse-induced acoustic sound in laser cutting is collected, and the data processing is performed with wavelet denoising and time-frequncy analyzing. The impact of laser processing parameters on the acoustic signal is discussed; and further analysis of the effect of cutting speed is conducted. The corresponding relationship between the best velocity and the maximum time-frequency energy density is got; also the plan of adaptive control in laser cutting is designed. The results in this paper can provide important parameters for adaptive control of laser cutting.
A Novel Video Detection System on Traffic Flow Inspection
Authors: Liu Zhan Wen , Lin Shan , Dou Sheng Gen
Published: June 2012

A prototype of video detection system applied to traffic flow inspection is developed, which uses CMOS linear image sensor with high resolution 2K pixels and wide dynamic range as the core of imaging device. It combines FPGA with DSP as the core of acquisition and processing of massive image data. Moreover, a novel multiscale and hierarchical clustering algorithm for image segmentation is presented. Based on the theory of graph spectral, the algorithm can construct a new graph by analyzing the feature of an original image at different clustering scales, so that image segmentation can be accomplished easily to segment the image. The simulation results show that the row scan speed of this system can reach to 1000 lines per second, the resolution being 2048 pixels.
Personal Motion-Measurement System via Piezoelectric Sensor
Authors: Yang Qi Hui , Huang Jun Bo , Li Ning Shan , Yang Rong Qian , Wu Xiao Ming , Li Yu He
Published: June 2012

Originated from the need in the training of sports universities, a new personal motion-measurement system via piezoelectric sensor is presented to detect step number, stride frequency, and energy consumption in motion. The motion-measurement system in training should be not only accurate in detection, but also convenient for athletes. The novel system consists of detection unit, RF-wireless unit, and display unit. Using a high-sensitive piezoelectric sensor placed within the ball or lateral side of a personal shoe, the accuracy is improved greatly. With RF-wireless, the system achieves the goal in convenience. In the display unit, detected step number, stride frequency, and energy consumption are used to evaluate the quantity of motion, so the athletics can adjust their gait immediately. Compared with existing systems, the personal motion-measurement system via piezoelectric sensor improves greatly in accuracy and convenience.
The Computation and Comparation of the Heat Consumption of the Equipment to Produce Semi-Hydrated Gypsum
Authors: You Zhi Yong , Han Ling Cui , Wei Ying Hui
Published: June 2012

Currently, at home and aboard many kinds of chemical gypsum processing equipment use steam as the heat source, and among them, five kinds are more mature. This article for the five semi-hydrated gypsum production equipment of thermal loss were calculated and compared. the pressure frying pan is the best choice out of the equipment.
Design and Realization of a Digital Multichannel Fluxgate Signal Processing System
Authors: Liu Shi Wei , Liu Shi Bin
Published: June 2012

Addressing drawbacks of analog components and questions of multi-channel fluxgate signal operation, a FPGA (Field Programmable Gate Array) based signal processing system is designed. Three copies of sub modules compose the whole system, each of which exclusively processes one of three outputs of the fluxgate sensor. A “Phase-Sensitive-Rectification & Low-Pass-Filtering” circuit structure is employed in the processing module, through which the fluxgate signal harmonics are extracted and converted into direct quantities according to detected magnetic intensities. Firstly designed in HDL (Hardware Description Language), afterward configurated in a FPGA chip, finally tested by processing outputs of a fluxgate sensor probe in real-time, the functionality of the designed system is verified. With inherent advantages, this FPGA based design is much reliable over temperature; by processing signals not time-sharingly but synchronously, its working speed is excellently high.
High-Speed and Anti-Interference Parallel Bus Design on Board
Authors: Yu Hong Qi , Liu Sen , Li Nan , Wang Meng , Xing Jin Ling , Sun Zhao Lin , Xu Xin
Published: June 2012

This paper presents a high-speed and anti-interference parallel bus design on board, which takes a series of measures, including source-synchronous technology, the negative feedback technology, low-voltage differential transmission technology, error correction coding and pseudo-random code technology to improve the environment for parallel communication, increase communication speed, decrease error rate .The final test shows the communication speed has achieved 10 Gbps and the error rate has reduced to 10-7.
Synthesis of Pure Bi12SiO20 Powder by Molten Salt Method
Authors: Lu Jun Que , Wang Xiu Feng , Jiang Hong Tao
Published: June 2012

Pure Bi12SiO20powder was successfully prepared by a molten salt method using Bi2O3and SiO2as raw materials and using KCl-K2CO3as flux at 635°C with the heating rate of 5°Cmin-1. The phase composition and microstructure of these products were analyzed by X-ray diffraction and scanning electron microscopy, and the effects of the processing parameters, such as the ratio of Bi2O3/SiO2, calciniation temperature, isothermal time and relative amount of salt, on the composition and particle size were investigated. The results indicated that regardless of changing the ratio of Bi2O3/SiO2, calciniation temperature, isothermal time or relative amount of salt the reaction only yielded Bi12SiO20without Bi2SiO5and Bi4Si3O12. Henceforth, KCl-K2CO3molten salts may be considered as an ideal reaction medium to synthesize pure phase of Bi12SiO20. The particle size of Bi12SiO20phase can be determined by changing the temperature, isothermal time and relative amount of salt.
Design and Realization of High Precision Time Interval Measurement Peripheral Circuit Based on FPGA
Authors: Diao Jie Tao , Xing Jin Ling , Huo Zhi , Zhou Zhou , Yu Hong Qi
Published: June 2012

it introduces a design and realization of high precision time interval measurement peripheral circuit based on FPGA, which can realize the high speed data sampling, high speed series to parallel converting, USB data transferring. The system verification under virtex4 XC4SX35-FF668 of Xilinx is carried out. The test result shows that the design can detect the signal as low as -8mV, the valve voltage works stably and each module work normal.
Development of Portable Intelligent Configuration Terminal Based on WinCE
Authors: Jing Hai Xia , Liu Zheng Guo , Wang Hai Yan , Shen Xiao Hong
Published: June 2012

Fast and convenient configuration of the industrial equipment will help engineers to complete their work more efficiently in the industrial field. At present, most industrial equipment is configurated by a personal computer with specific configuration software. A design method for portable configuration equipment is proposed, which uses the Samsung S3C2440 SoC chip and develops the configuration software based on the Microsoft WinCE operating system. Compared with the previous industrial control computer, this equipment has the following merits: low consumption, miniaturization, expandability and intellectualization, which has been applied successfully in Xi’an Xianyang Kunning Microelectronics Institute for its isolated KN5000 Series product configuration.
Damage Behavior of Foam Core Sandwich Composites Subjected to Quasi-Static Indentation Testing
Authors: Yan Li , An Xue Feng , Cai Jian Li , Yi Xiao Su
Published: June 2012

Damage behavior of foam core sandwich composites subjected to quasi-static indentation testing was investigated detailedly. Force-displacement curves and the cross-sections of damaged sandwich panels were analyzed. Effects of core thickness, face-sheet thickness and toughness of face-sheet materials were discussed by comparison with different specimens subjected to quasi-static indentation testing. Results showed that damage behavior of sandwich composites had identical feature. Collapse of foam core initially appeared, and then foam core generated crack. Delamination and fiber breakage of upper face-sheet occurred. Finally, the foam core and the face-sheet were disengaged. For the specimens with thick foam cores, the foam crack extended in longitudinal direction was caused. However, for the specimens with thin foam cores, the foam cracked in transverse direction. After face-sheets were toughened with PAEK, the damage resistance and the maximum force of the sandwich panels increased. Also, the shear angle of foam crack changed to be lager. Compared with the penetrated damage behavior of sandwich panels with thin face-sheets, the upper face-sheets of the former the specimens with thick face-sheets bulged partially and could not be penetrated.
A Configurable Routing Protocol for Bluetooth Wireless Networks
Authors: Yu Chih Min , Yu Jing Rung
Published: June 2012

Blueweb is a self-organizing Bluetooth-based multihop network equipped with a scatternet formation algorithm and a hybrid routing protocol. The routing protocol combines the reactive method globally and the proactive method locally to discover the optimal path for packet transmission. In Blueweb, the route master maintains the global topology information and each master maintains its own N-tier routing information. In this paper, a tier number decision algorithm is used in Blueweb to determine the optimal number of tiers for all the other masters. Our computer simulation results show that this algorithm can efficiently improve the routing performance and reduce the routing maintenance cost for Blueweb routing protocol.
GMSK Modulation Design in General Hardware-in-the-Loop Communication Simulator
Authors: Zhang Qian
Published: June 2012

Hardware-in-the-loop communication equipment simulation is an important step of the development about communications and electromagnetic environment simulation. Reference to the "software radio" design thinking, the source library is generated by the software and different communication signals are generated by the fixed hardware frame. The system achieves “versatility”. GMSK in wireless communications has been widely applied. It is one of the important signals generated by the simulator. Based on analysis of the structure, the paper introduces the design of the simulator. It also provides the software simulation of Matlab. It provides a reference simulation for communications equipment and electromagnetic environment simulation.
Design and Tests of Wireless Network for Heat Metering System
Authors: Wang Xiao , Ma Ru Jian , Zhang En Ping
Published: June 2012

A wireless self-organizing network for heat metering system is designed based on ZigBee in this paper. XBee-Pro module is used for terminal nodes. Such nodes set up wireless mesh network, collecting heating meter data on one hand and realizing remote transmission of data though setting up mesh network with Router and Coordinator. The test is showing that wireless network system based on XBee-Pro module is convenient to use, reliable to transmit data and applies to collect spot discrete data and wireless transmission and meet requirement of heating meter remote transmission, realizing informatization and automation of controlling and monitoring of heating meter system.
Design and Implementation of 6LoWPAN Protocol Stack on Single-MCU Based on CC2430
Authors: Wang Heng , Chen Jing Ming , Wang Ping
Published: June 2012

Combined the characteristics of IEEE 802.15.4 standard and the IPv6 protocol, the paper designs a set of 6LoWPAN protocol stack software on single-MCU based on CC2430. This set of protocol stack is designed for industrial applications. This paper completes the fragmentation and reassembly, header compression and other basic functions of 6LoWPAN. Finally, with the typical application of industrial equipments, we build a practical test system to test the data communications of the 6LoWPAN protocol stack. And, it verifies the correctness and practicability of 6LoWPAN protocol.
Study on the Impact Damage Characteristic of the Ex-Situ Toughened Composite Laminates
Authors: Ma Hong Yi , An Xue Feng , Zhang Dai Jun , Yi Xiao Su
Published: June 2012

In this paper, two carbon fiber/bismaleimide resin composites were prepared via ex-situ toughening technique. The damage resistance and damage tolerance of these two fiber-reinforced polymer composites were then studied in terms of low-velocity impact test and compression strength after impact (CAI). The results indicated that the T300 carbon fiber-reinforced composites had better damage resistance response and higher damage tolerance, and the visual observation of damage was also achieved. However, the T700 carbon fiber-reinforced composites had higher breaking elongation, and therefore the composite was not sensitive to the low-velocity impact. In addition, the CAI strength of this composite was still low.
Design of an Electronic Voltage Transformer Suitable for Digital Transformer Substation
Authors: Feng Qiao Ling , Zhang Hua
Published: June 2012

In this paper an electronic voltage-current voltage transformer (EVCVT) scheme has been proposed based on voltage-current transformation, using the voltage - current transformation technology and weak current detection technology to achieve the accurate measurement of the grid voltage. It transforms the high voltage into low current by high voltage thick film resistor, then the current sensor transforms the low current signal into a standard analog voltage signal, thus an AD converter collects the voltage signal, and the value be imported into the microprocessor for filtration, calibration, coding. After filtering the data would be transmitted to the upper computer or relay protection devices of the digital substation. This paper focused on the design of hardware circuit of digital voltage transformer, developed the software package and produced a prototype control board. Initial experiments show that the scheme is valuable for digital substation.
The Data Acquisition of High Speed A/D Conversion Based on STC12C5A32S2 SCM
Authors: Wu Cheng Ying , Fan Zhan You , Ma Hong Jiao , He Zai Min , Wang Zhao Ming
Published: June 2012

In order to achieve high-accuracy, high speed and low cost A/D conversion, a new design based on STC12C5A32S2 single-chip microcomputer (SCM) is given. Compared with the previous A/D conversion, the biggest advantage is that the paper combine software with hardware and it can adjust the speed of transformation through procedure.We don't need to modify circuit, just need to modify signals of input and procedures. So the flexibility of A/D conversion can be enhanced, also saved costs. The design mainly makes use of new function of STC12C5A32S2 SCM to realize conversion between analog signals and digital signals. In order that researchers can analyze and use the convention results, the design add a LCD display module. The paper primarily analyses the design of circuit and interface technology between the SCM and other chips. Also, the peculiar function of STC, the LCD display method of LMB202DDC and the flow of software are expounded in detail. The simulation result based on Proteus is given by the end of paper.
The Design and Implementation of Interactive Response System Based on RFID and MAS Technology
Authors: Qiang Jue Xian , Liang Yun
Published: June 2012

Modern education has put more and more emphasis on the importance of interaction between teachers and students in the classroom. One of the main directions of the digital learning research is interactive technology. This paper has designed an Interactive Response System for classroom instruction based on RFID and MAS technology. It is a technology platform, including teacher control side, students voting machines (one for each student), receivers, and supporting software.
Fusion of Fuzzy Set and FCM for Image Segmentation
Authors: Zhang Chao Quan , Chen Liang , Zhou Shao Jing
Published: June 2012

Image segmentation with the traditional Fuzzy C-means (FCM) algorithm only uses each pixel’s gray value, when the image is corrupted by noises, the accuracy of segmentation will be greatly reduced. So, this paper proposed an image segmentation method which based on rough sets theory and fuzzy c-mean clustering. The test result shows that the method has a good segmentation performance.
An Arc Image Processing System Design and Testing
Authors: Zhao Yan , Liu Jiao Min
Published: June 2012

In this paper, research on a high speed arc image sampling and processing system based on DSP has been done. A RS-422A interface has been used to sample high speed image, A TMS320C40 high speed DSP and high frame rate CCD are used as the sensor. The optical image can be converted into digital image in this image sampling and processing system efficiently, with the high speed DSP and the high speed memories, to improve the data transfer speed and receive the image data correctly, DMA data communication technology is adopted. The test result shows that this system is very effective for arc research.
The Design of the Multifunctional Electronic Timing System Based on the Verilog HDL Language
Authors: Zhang Ming , Liu Hao Ting , Wang Yu
Published: June 2012

Verilog is the most widely used hardware description language. It can be used in the modeling, synthesis, and simulation stages of the hardware system designing. This thesis is about applying Verilog HDL to design the multifunctional electronic timing system. This system has brought about the timing function, the Alarm clock function, the time checking module, the stop clock module, the exact hour alarming module, the alarm clock’s shielding and alarming function module and the stop clock Prompting function module. The modules which have applied this design can be transplanted to other kinds of electronic control systems conveniently. This system uses the Verilog HDL to design, so it has nothing to do with the craft. It allows us to attain the applicable actual circuit easily without considering much about the details of the gate level and the realization of the craft in the function designing stage and the logic verification stage. We just need to exert different conditions according to the demand of the design of the system.
Design of Electric Power System Based on Component GIS
Authors: Wang Jian Min , Yan Wen Yu
Published: June 2012

GIS is getting more attention in the application of electric power system. This article mainly focuses on the electric GIS system based on the practical need in the electric system. This electric GIS system is composed of three subsidiary systems, among which PDA may transfer data collected by the inspectors to GIS general management and control system through GPRS, design the Geodatabase and system functional modules which accessed by multiple users simultaneously with C/S model, to achieve the automation in the information sharing and collaborative work.
Study on CAD System for Semi-Armor-Piercing Warhead
Authors: Yang Yun Bing , Lu Yong Gang , Zhou Yan
Published: June 2012

Based on integration design method for semi-armor-piercing warhead, the design and implementation of CAD system are illuminated. The whole frame of CAD system is established. The function of integration design system is analyzed by IDEF0 method, and the functional modules are established. System software structure is founded based on system functional characteristic. Based on the technique of database and visualization, the key techniques of system implementation are analyzed in detail, which include database, visualization, etc. Finally, an application example of CAD system is given.
A Recognition Method Using SA Optimized SVM-DS
Authors: Li Jun , Pu Hai Bo
Published: June 2012

Through properly setting the simulated annealing options of acceptance function, annealing function and temperature function, an adaptive hyper-parameter estimation method using simulated annealing algorithm is applied to improve the accuracy and efficiency of SVM. While, in order to eliminate the effects of error accumulation in multi-SVM, D-S theory is employed for decision fusion of SVM classifiers. When delimiting the belief and plausibility measures, recognition capability of SVM classifiers has been taken into account. And the Dempster decision rule also has been considered to the recognition result of each SVM classifier in the fusion algorithm. Finely, with the data set in the database of Statlog for the study, the experiment result indicates that this method can significantly increase the classification accuracy and demonstrate a good performance of robust.
Experimental Study on Cutting Forces in Turning Aluminum-Silicon Alloy
Authors: Yuan Yue Feng , Zhang Wen Ying , Chang Xing
Published: June 2012

Cutting force experiments in turning aluminum-silicon alloy were carried out with cement carbide tool YG8. Experimental formulae of cutting force, back force and feed force were determined based on multi-variable linear regression analysis, and they were verified by analysis of variance, the results showed that the regressed models could be used to predict cutting force under certain conditions.
Automatic Load-Balanced Partitioning Strategy in Parallel Multilevel Fast Multipole Algorithm
Authors: Gong Zhi Xun , Tong Wei Qin , Li Ying
Published: June 2012

In this paper, we propose an automatic load-balanced partitioning strategy for parallel multilevel fast multipole algorithm(MLFMA) based on distributed-memory architectures to solve the large scale electromagnetic scattering problems. We focus on the automatic load-balancing partitioning strategy because that our original scheme requires that users input the transition level, which is usually determined on the users’ experience and sometimes lead to a bad load-balancing partition. By introducing the automatic load-balancing algorithm to our pervious partitioning technique, our implementation can automatically achieve the best load-balancing and consequently attain better parallel efficiency. To present the effectiveness of the new strategy, we analyze results of the previous implementation according to different inputs of transition level and compare them with the result of implementation using the new algorithm.
Design of Semantic Search Engine Architecture Based on Component
Authors: Wang Huai Feng , Gao Guang Yao
Published: June 2012

The future search engine should understand the content of Web pages and implement logical reasoning, in order to achieve complex search and correct results. This paper introduced relative theory of component and RDF, created a conceptual architecture for semantic search engine, and discussed its components and their relationships. Finally, advantages of this architecture are proved.
Tailoring of Thermal Transition Temperature and Toughening of Shape Memory Epoxy Polymer
Authors: Deng Hua , Gao Jun Peng , An Xue Feng , Yi Xiao Su
Published: June 2012

Shape memory epoxy polymer (SMEP-1) was modified by introducing ﬂexible epoxy into existing resin system. The thermal transition temperature (Ttrans) of shape memory polymer was tailored from 100°C to 76°C with the increase of the weight fraction of the flexible epoxy. The toughness of the polymer was also measured at the same time. The results show that the toughness of the polymer was improved especially at ultralow temperature. The addition of the flexible epoxy didn’t affect the excellent shape memory properties of the polymers.
Modeling of the Temperature Distribution in Machining TC4 Titanium Alloy
Authors: Li Bin , Wang Hong
Published: June 2012

As one of the most commonly used titanium alloys, TC4 (Ti6Al4V) has an alpha–beta structure and is widely used for aircraft components. In this study, numerical simulation was conducted by using FEM software on the whole cutting process for TC4 alloy mounting parts in an effort to investigate the metal flow behavior. This study not only helps to understand but also to improve and optimize cutting process, which are based on experience combined with a trial-and-error approach.
Research and Implementation of Enterprise Application Integration Based on SOA
Authors: Wu Zhuang , Li Yan
Published: June 2012

In essence, Service Oriented Architecture (SOA) is distributed and shall not have any centralized control point. Any application can access an SOA network for interaction as long as it complies with the corresponding standards. A centralized SOA architecture can also be regarded as a part of SOA. The birth and development of SOA provides a new integration technology for enterprise applications. At the same time, the IT infrastructure could provide a better service, let the enterprise, customer, partner, supplier and distributor attend commercial activity conveniently and get information what they want. In order to attain this aim, they always use integration. Through this way all business entities would be related in together, share commercial data, and complete the commercial activity together. But tradition "point-to-point" integrated method unable to satisfy the enterprise's electronic commerce demand and cause high cost and low efficiency. An integration solution based on SOA(face service construction) is put forward, which utilizes the open standard and protocol, from the global viewpoint, connect the enterprise's business process and IT infrastructure. Then a unified, standardized integration platform will be established.
Design of Experiment Framework Based on Warship Equipment Maintenance Support Simulation Experiment and Exploratory Analysis
Authors: Peng Ying Wu , Chen Wei Yi , Ruan Min Zhi , Xiao Ding
Published: June 2012

The warship equipment maintenance support system is a complex system, which has uncertainty. Aimed at uncertain support scheme, the equipment maintenance support simulation experiment (EMSSE) is a method based on exploratory analysis (EA) and simulation. According to the characters of EA and the demand of EMSSE planning, an experiment framework (EF) based on EMSSE was put forward a experiment framework (EF) which makes the problem solved more flexibly because of being independent of the simulation model,, and the content was analyzed in detail. Finally, an example of warship maintenance support is introduced to explain application of EF and validate it feasible.
Modeling and Simulation of Micro Hydraulic Transducer Based on Component Library
Authors: Hu Wei , Wei Xin , Xie Xiao Zhu
Published: June 2012

For MHT is an integrated system for different domains, namely fluids, structures, piezoelectrics and circuitry, a component library consisting of inlets, outlets, chambers and piezoelectric blocks is developed with Modelica. The governing equations of inlet and outlet channels, chamber and piezoelectric block are proposed and parameter models are created based on object-oriented method with Modelica. Then the model of MHT is established by connecting different components’ pins of equivalent type. Simulation results on Dymola show accordance with that on Simulink, which indicates that this method can achieve high efficiency and precision.
Improve Resonance Frequency for Airbag Electronic Control Unit
Authors: Liu Wei Guo , Yu Tao , Fang Han , Jiang Zhen Wei , Zhao Frank , Han Qing Kai
Published: June 2012

With CAE simulation technology and vehicle test, the frequency response characteristics of airbag electronic control unit bracket are analyzed and the structures of airbag electronic control unit bracket are modified. Finally, the resonance requirements for installation position of airbag electronic control unit are met.
An Improved Construction Method on a New Strengthening Buffer Operator and Numerical Simulation
Authors: Gan Jian Hong , He Tong Li
Published: June 2012

Ameliorating the smoothness of the data sequence is an effective way to enhance the prediction accuracy of GM (1,1) model. With deep analysis of the existing strengthen operator, two types of new strengthen operator have constructed in this paper according to the new buffer operator axioms and principles of information priority. The article has studied its characteristics and internal relations, such examples have demonstrated the effectiveness and practicality of operators, while solving the problem about the quantitative predictions inconsistent with qualitative conclusions we can refer to the methods.
3-D Numerical Study of Effect of Flow Parameters upon the Uniformity of NH3 in Urea-SCR
Authors: Vikas R. , Mallikarjuna J.M. , Ganesan V.
Published: June 2012

Nowadays, due to the stringent engine emission norms, an efficient technique is required to reduce oxides of nitrogen (NOX) from automobiles especially from the lean burn engines. Although Urea Selective Catalytic Reduction (SCR) is capable of satisfying these norms, the ammonia slip nullifies its advantages. Ammonia slip is mainly due to the lack of uniformity of ammonia at the monolith entrance. The uniformity of ammonia distribution mainly depends upon the flow parameters of exhaust gas and the injection parameters of urea water solution. The current study addresses the effect of flow parameters, temperature and flow rate of exhaust gas on the injection pressure. The results obtained reveals useful guidelines for enhancing the uniformity of ammonia in Urea-SCR.
Equation Model to Evaluate Fluidity of Aluminum Alloys under Pressure Die-Casting Conditions with an Application
Authors: Semanco Pavol , Fedák Marcel , Rimár Miroslav , Ragan Emil
Published: June 2012

The fluidity length of aluminum alloy is key parameter in mold-filling process. Generally it impacts the final quality of the cast products. In the paper we introduce our mathematical model for estimating the fluidity length of the particular alloy under high pressure die casting conditions. We tested our model against the spiral test to compare results and verified the feasibility of this particular mathematical model.
FEM Analysis of the Pendulum Characteristic of Nature Convection in Dimensional Enclosure
Authors: Yu Quan Gang , Piao Lin Hua , Wang Xing
Published: June 2012

In this paper, the pendulum characteristic of nature convection gas in dimensional enclosure is analyzed by FEM. Using ANSYS-FLOTRAN CFD program, the stream field and the temperature field caused by the point heat source, when the two-dimensional enclosure is inclined, has been obtained by a series of procedure, such as model building, meshing, loads applying and equation solving. The results are as follow: (1)Under the buoyancy lift affecting, the direction of nature convection gas always keeps the vertical upward in two-dimensional enclosure, nature convection gas has the pendulum characteristic. (2)When the dimensional enclosure is inclined, temperature distribution at the several points in dimensional enclosure will change with the tilt angle. The pendulum characteristic can be utilized to measure the tilt angle by the gas pendulum tilt sensor.
A Matching Selection of Cutter Tools Based on Substep Integrated Intelligent Computation
Authors: Zeng Huang Lin , Tang Xue Fei
Published: June 2012

An intelligent computation is proposed for a matching selection of cutter tools in this paper. A matching selection of cutter tools based on an intelligent computation and knowledge reasoning is realized by three steps. At the first, a cutter tool is roughly selected by inference machine of an expert database. Then a matching scheme of cutter tools will be realized by a RBF neural network. Finally, a matching selection scheme of cutter tools is determined by fuzzy inference machine. It is shown that method proposed here is of a higher efficiency for a matching selection of cutter tools in processing and manufacturing of CNC machine.
Modeling of the Power Factor Correction of 8/6 Poles Switched Reluctance Motors
Authors: Gao Jie , Sun He Xu , Gao Bing , He Lin , Dong Yan
Published: June 2012

In the traditional power topology structure of switched reluctance motor (SRM), the ideal DC bus voltage is supplied by the circuit which is composed by a rectifier bridge and a filter capacitor. The capacitor is usually large to reduce the torque ripple, so the conducting time of AC source is very short and the power factor is reductive. A novel power topology structure of SRM is presented in this paper, and it is applied to the traditional split-phase structure to carry out power factor correction (PFC). This paper sets up the two-phase simultaneous excitation of four phases 8/6 poles SRD based on MATLAB/SIMULINK, and analyzes the current, voltage, torque etc. of two-phase excitation. The simulation results proves that the novel topology is not only improving the power factor but also optimizing the motor starting performance and efficiency, and it provides a feasible way for the study of energy conservation and efficient SRM.
Research on Fuzzy-PID Control for Contra Rotating PMBLDCM
Authors: Li Yan Sheng , Dou Man Feng , Lei Jin Li
Published: June 2012

The system of contra rotating PMBLDCM widely used in underwater vehicle is a non-linear, multi-variable, time-varying system. Using the traditional method for PID control is difficult to achieve fine control effect. By designing a Fuzzy-PID controller, fuzzy algorithm for on-line auto-tuning PID parameters is applied to the system of a speed closed-loop in PMBLDCM double closed-loop system. An example of how to design and simulate the system by using the software MATLAB is introduced. The simulation results show that the method of Fuzzy-PID control has better control performance comparing with the conventional PID control, it has characteristics of no overshoot, fast response, small torque ripple.
The Fault Prediction of Aerospace Equipment PHM Technology and its Demonstrated Failure Prediction Module Simulation
Authors: Li Ni , Li Zhen Hua
Published: June 2012

Prognostics and Health Management Technology (PHM) will make up the deficiencies of current device monitoring and fault diagnosis, especially the lack of fault prediction. Its combination with the neural network can provide a universal theory and technology of the intelligence prediction. Though the experiments, we establish the BP neural network, as well as the most suitable prediction model. After testing data verification, neural networks can accurately predict the status of the equipment, and the health trends in the future. With the network we can accurately predict the system state, remaining life for the aerospace equipment, make it possible to provide maintenance in time, reduce failure losses and improve reliability.
The Simulation Analysis of Cable-Creating Machine on Vibration and Noise Reduction
Authors: Zhang Qing Yue , Zhao Ling Yan , Zhao Zi Jun , Li Xun Bo , Guo Hui , Yan Ming Ming
Published: June 2012

According to review the structural characteristics and the operating conditions of cable-creating machine. That we can find noise source and analysis the cause of noise of cable-creating machine by mechanical kinetics, shake and the theory of acoustic. Next we will establish the model of cable-creating machine and complete mechanics analysis by simulation analysis. In the end we find a method to optimize the structure in order to have the noise of the machine finally zoom an average of 5 - 10db.
An Improved Architecture for Multi-Core Prefetching
Authors: Fang Juan , Zhang Hong Bo
Published: June 2012

The “Memory Wall” problem has become a bottleneck for the performance of processor, and on-chip multiprocessor(CMP) aggravates the memory access latency. So many hardware prefetching techniques have been brought to solve this challenge, i.e. Future Execution. This paper introduces runahead execution(another hardware prefetching technique firstly used on single-core processor) and Future Execution, then it brings up some improvement for Future Execution and gives the result and analysis of data tested by SPEC2000 benchmark.
An Embedded Multicore Platform Exploration in Video Application Utilizing FPGA
Authors: Xiao Chun Hua , Huang Zhang Qin , Li Da
Published: June 2012

Multi-processor is not a new technology, but with the development of modern silicon technology, it is possible to integrate multiple cores in a single chip package, which is called multicore processor. Whether in the desktop personal machine, or embedded applications, multicore processor has been a general trend, due to the requirement of high performance and design problems in single-core processor. Surrounded multi-screen provides a better sense of reality, which is widely used in the surveillance, military, exhibitions, and so on. With the advantages in parallel processing, multicore technology has an important practical significance and a broad prospect in these applications. In this paper, an exploration on multicore architecture is mainly focused on, from the perspectives of processing elements, memory hierarchy, and on-chip interconnection. A basic platform for multi-screen display is implemented on the Xilinx field programmable gate array (FPGA), and it illustrates that there is a 3.6 times higher performance than the corresponding single-core design, which provides a helpful guidance and revelation to further researches.
Improved Algorithms for Motion Detection of Intelligent Video Surveillance System
Authors: Wang Yan Ling , Wang Xiao Li , Li Guang Lun
Published: June 2012

Real-time segmentation of moving regions in image sequences is a fundamental step in video monitoring systems. This paper presents an improved motion detection algorithm in a dynamic scene based on change detection. The algorithm integrates the temporal differencing method and background subtraction method to achieve better performance. Background subtraction is a typical change detection approach to segment foreground, but the continuous or abrupt variations of lighting conditions that cause unexpected changes in intensities on the background reference image. So we combine the background subtraction’s result with temporal difference’s result. The foreground mask is segmented by both the methods of background subtraction and temporal differencing. Finally, a post-processing is applied on the obtained object mask to reduce regions and smooth the moving region boundary. Experimental results demonstrate that the proposed method can update the background exactly and quickly along with the variation of illumination, and the moving objects can be extracted effectively.
Performing Balanced Ternary Logic and Arithmetic Operations with Spiking Neural P Systems with Anti-Spikes
Authors: Peng Xian Wu , Fan Xiao Ping , Liu Jian Xun
Published: June 2012

Spiking neural P systems are a class of distributed and parallel computing models inspired by P systems and spiking neural networks.Spiking neural P system with anti-spikes can encode the balanced ternary three digits in a natural way using three states called anti-spikes, no-input and spikes. In this paper we use this variant of SN P system to simulate universal balanced ternary logic gates including AND,OR and NOT gate and to perform some basic balanced ternary arithmetic operations like addition and subtraction on balanced ternary integers. This paper provides an applicational answer to an open problem formulated by L.Pan and Gh. Păun.
Channel Modeling of Vehicle Detection System for UWB Communication
Authors: Gong Shu Ai , Xu Zhe Xin , Wang Lin
Published: June 2012

In this paper, a new channel model through ultra-wideband (UWB) communication for vehicle detection system (VDS) is proposed. The Gauss 2st derivative function is used as the transmitted signal and the received signal is evaluated. The main objective of this work is to provide an analytical approach for obtaining the main parameters under new channel through the bodywork structure properties. The characteristic of the RMS delay spread is discussed in this paper.
DOE Optimizing of Anti-Whiplash Seat Performances
Authors: Liu Wei Guo , Yu Tao , Fang Han , Zhao Frank , Han Qing Kai
Published: June 2012

In order to solve the problem that the performance of anti-whiplash seat did not satisfy the requirements of score, the seat is analyzed for the structure and simulation. It is found that there are several main factors which have great influence on it such as Head Restraint geometry position, Head Restraint and seat back stiffness, seat bracket stiffness and so on. With optimized and adjusted correlative parameter, the seat exerts itself completely with excellent performance of anti-whiplash and this performance of car will also meet target request.