bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimal Configuration Strategy of Multi-Granularity Components in a Complex Service Modelling Environment
Authors: Yin Yan Chao
Published: December 2012

Designing large service systems out of reusable components has become increasingly popular. However the existing large-grained component in the enterprise service system are hard to satisfy the requirements of efficient reuse and development. For the strengths of configuration techniques, this paper proposes a optimal configuration methodology framework of multi-granularity components based on stable service chain. Firstly, the stable service chain is established to select heterogeneous service components, in which service system is decomposed into fictional Integrated Stable Points (ISP) according to stability and variability of business model; Then, Large-grained component is selected to be a stable service function, and small size components are combined to achieve variable services, based on which, the corresponding component sequences for each ISP are selected with the characteristic mapping strategy. Finally, this method was validated by the construction practice of product application service system in Sichuan Truck Manufacture Plant Co., Ltd.
Research on an Improved CHI Feature Selection Method
Authors: Qiu Yun Fei , Wang Wei , Liu Da You
Published: December 2012

In order to make the features selected are distributed intensively in a certain class ,evenly in that certain class as much as possible, and make features appear in that certain class as many as possible , three adjusted parameters are added to the originally traditional CHI-square feature selection method through analyzing the relevance between features and classes. Var-CHI statistic method based on variance makes the precision and recall improved apparently by comparing the experiments of the traditional CHI-square feature selection method and the improved one.
Key Technologies in Design and Realization of Simulation Software for the Satellite Experimentations’ Inversion
Authors: Shi Lei , Li Zhi , Xu Can , Shao Yong Zhe
Published: December 2012

To fulfill the requirements of processing, analysis and inversing the observational data of experimentations, simulation software for the inversion of satellite experimentations is designed and developed independently on the developing platform of Qt, based on satellite observational data inverse theory. It provides a simulation and calculation platform for analysis and evaluation of space tests. By using dynamics principle and energy conservation principle, the software resolves inverse problems in satellite orbital dynamics. This article mainly presents the function and design method of the software, explains the design goals, shows the overall design framework, and emphasizes key technologies and countermeasures in process of the software design and realization. The software could be used to investigate the inversion of observational data and evaluate technologic indexes in satellite tests.
A Radar Fault Prediction Based on LM-BP Neural Network
Authors: Liu S H , Bi Z J , Zhang W
Published: December 2012

In order to overcome the difficulty of modern radar fault prediction，which induced by the complexity of system compose，fuzziness of configuration connection and incompletely and uncertainty of character parameters，a LM-BP neural networ model is studied based on BP neural networ model and LM optimized algorithm to optimize the network error function and increase the prediction precision of this model. The simulation and analysis are finished using a radar fault prediction example and show validity the of this model.
An Improved Method of Tracking the Motion of Sperm Target
Authors: Deng Zhen Rong , Huang Wen Ming , Yu Dong , Li Yin Wei
Published: December 2012

This paper analyzes the multi-target tracking of sperm by using the improved nearest neighbor data association tracking method which predicts the position where the sperm may appear in the next frame by computing the interframe-distance and direction of the sperm. Also, in order to dealing with the situation of tracking lose and many-to-one tracking, we proposed two processing methods for sperm re-tracking of tracking lost compensation and tracking forecast minimum-range. The experiment shows this algorithm has better tracking accuracy and higher efficiency.
A Component Query Method Based on Facet Description
Authors: Li Yan Ling , Zhu Ye Hang
Published: December 2012

The representation and retrieval technology of components are two core technology of the reusable component library. Related research think that the component query method based on facet description is much better than other methods, but when the user is not familiar with the term hierarchical tree of facet, they can not accurately represent the needs of their inquiry, so lead to lower query precision.To address this problem, this paper proposes a component query method based on facet description .In this method, the component will be expressed as vector form. Through the iterative process, using the user feedback information on the query results to adjust the user query vector constantly, and making it approximate the ideal query vector. Through the related experiments, this method is proven to improve the effectiveness of the component query precision.
3D Medical Images Registration Based on GPU Parallel Computing
Authors: Meng Lu
Published: December 2012

Real time 3D medical image registration method is key technology of medical image processing, especially in surgical operation navigation. However, current 3D medical image registration methods are time-consuming, which can’t meet the real time requirement of clinical application. To solve this problem, this paper presented a high performance computational method based on CUDA ( Compute Unified Device Architecture), which took full advantage of GPU parallel computing under CUDA architecture combined with image multiple scale and maximum mutual information to make fast registration of three dimensional medical image. Experiments showed that this algorithm can greatly accelerate the computational speed of registration of three dimensional medical image, and meet the real time requirement of clinical application.
Digital Image Watermarking Based on Second Generation Wavelet Transform
Authors: Kong Jian Quan , Zhou De Quan
Published: December 2012

Most of the watermarking techniques based on DWT technique embed watermarks into the detail (or middle frequency) coefficients of the host image for a good-trade-off between robustness and fidelity. But, in order to obtain the most robustness, the DC area (LL sub-band) may be a most suitable region for watermark embedding, as the signal energy of DC components is much bigger than that of high frequency sub-bands. A blind novel watermarking algorithm based on fast lifting wavelet transform, a kind of second generation wavelet transform, is proposed. Firstly, a multi-level discrete lifting wavelet transform is employed, and then the watermark is embedded into DC area of last level lifting wavelet transform according to amplitude modulation method with a secret key, lastly a watermarked image is obtained after lifting wavelet reconstruction to be applied. The results of experiments show that this algorithm is still effective after applying high compression ratio JPEG.
Requirement Analysis and Identification of Challenges and Issues for RTDBs in Cloud Computing
Authors: Irfan Muhammad , Zhu Hong
Published: December 2012

Cloud computing is baseline to invent next generation systems. As computer science is progressing by steps of cloud computing, same as requirements gathering, analysis in cloud computing getting more potential. The cloud computing enables services to fulfill requirements of cloud end-user, according to service level agreements. Data services over cloud also getting more potential especially real-time database systems are more critical to meet customer requirements over cloud. We will elaborate and present detailed analysis about requirements for real-time database systems over cloud, as well identify challenges and issues for RTDBs (real-time database systems) in cloud computing. There is need to ensure quality of service (QoS) as guaranty to meet requirements of RTDBs.
Cascade Network in Reversible Logic Gate Based on Series Connection
Authors: Guan Zhi Jin , Ding Wei Ping , Cheng Xue Yun
Published: December 2012

This paper analyzes and proves that the relationship between the output results of the homotypic Toffoli gate which is series cascade and the number of the gates which are series cascade. In order to guarantee the convergence of the process of the series cascade, we gave the counting results of the series cascade network for Toffoli gates, and proved that in the input vector (0, 1, …, 2n-1), the number of the bit vectors with Hamming weight H(w)≥n-1 is equal to the bit number of bit vectors plus 1, and obtained the conclusion that there are (n+1)! kinds of transformation for Toffoli gate series cascade network. Simultaneously we provide the series cascade network algorithm of the Toffoli gates. The reversible network cascade system designed by the above algorithm verified the validity of this algorithm.
Study on the Interlaboratory Comparison Test of the Electronic Test Method for Raw Silk
Authors: Xu Jian Mei , Zhou Ying , Dong Suo Zhuai , Gatti Francesco , Wu Dong Ping , Bian Xin Er , Zhao Zhi Min
Published: December 2012

To establish an international standard on the electronic testing method for raw silk, the interlaboratory comparison tests of the electronic testing method for raw silk are done. Five lots of soaked silk are sampled and tested by four machines of the same type in four labs, 13 items including the defects and evenness information of each lot of silk are measured. The analysis of variance and multiple comparison procedure are used to find whether there exist significant differences among the four machines; and the result shows that there are no significant differences among the machines in testing these items except for the item of IPMe by optical sensor. The reason for the difference is analyzed, and the measure for dismissing the difference is proposed.
The Design and Implementation of Construction Site Safety Supervisory System Based on the Internet of Things
Authors: Jiang Zhi Hong , Huang Feng , Wang Da Xi , Hu Bo , Dou Ji Jiang
Published: December 2012

According to the present situation that China's construction site safety supervision of the development toward informatization, this essay put forward a kind of construction site safety supervisory system based on the internet of things through the introduction of wireless network. At first, combined with the requirements of government and industry, we have analyses the requirements of building construction site for safety supervision. Then combined with the difference between architecture construction site and industrial production safety supervision, referring to the existing industrial video safety supervision system, we put forward the structure of the construction site safety system based on the internet of things. At last, we have also analyses several problems about the contracture of network nodes which should be valued. Wireless network can be better adapted to the changing characteristics of construction site safety supervisory operation, and this will promote effectively the development of safety supervision toward the direction of informationization.
Mechanism on RFID Tag Privacy Information Coordination Protection
Authors: Cheng Jun Jun , Cheng Cheng , Yu Kui Fei , Ylä-Jääski Antti , Li Zhong , Zhang Hao
Published: December 2012

RFID system is facing the serious problems of private security, which mainly consists of the leakage of tag sensitive information, tracking and monitoring spitefully the carrier of mobile tag. This paper constructs a coordination protection mechanism of tag private information by a variety of reader-writer, which solves the two questions mentioned above. Firstly, a trust-security mechanism used to ensure that the readers in system are trustful. Next, via intercommunication of the readers, the secret key, which is produced by the tag-charged reader, is divided and distributed to the various readers in system. The test result shows that attackers cannot gain the shared secret key from various readers, and he/she could only read an encoded data, thus the security of private information in tag is guaranteed. Additionally, a set of readers use coordination-protection mechanism, which is an efficient way to improve the expandability of the system.
Design and Implementation of Long Range UHF RFID Reader
Authors: Xia Hong , Song Jin Min , Su Chang Jie
Published: December 2012

Aiming at the problems how to realize long range, high speed identification and how to integrate web with the management system in the UHF RFID applications, a UHF RFID reader system based on S3C2440 microprocessor and AS3992 UHF Reader chip is designed and implemented in this paper. By designing the RF front-end power amplifier and signal isolation circuit, the transmit power detection circuit and the antenna impedance tunable matching circuit, the transmit power reaches up to 32 dBm and the receiver SNR is improved at the same time, resulting in the stable read range reaching up to 12 meters. In order to integrate web control into the RFID management system, the reader system is transplanted into the embedded Linux OS and a web management system that is based on web server and CGI is constructed. Device drivers are developed and RFID APIs are packaged, greatly facilitating the software development and maintenance. By using the Random-Slotted anti-collision algorithm, high speed identification of ISO18000-6C RFID tags has been achieved.
Application of Fault Detection Based on Variable Precision Rough Sets
Authors: Chen Na , Yang Shao Pu , Pan Cun Zhi
Published: December 2012

A VPRS (Variable Precision Rough Sets) data model is created according to measured signals collected from the bridge erecting machine safety monitoring system, and the signals acquired from many different sensors are theoretically deduced and discussed on this model. Combining with classificatory error parameter and approximate dependence degree, the relationship between signals and noises is analyzed to fulfill Multi-sensor Information Fusion theory. Finally the order of validity about the multi-sampling points is obtained, which can used to direct localization of sensors.
The Evaluation Method of Critical Equipments in a PdM System
Authors: Xia Yan Chun
Published: December 2012

The method of how to select target equipments in a whole plant for a PdM program is proposed in the paper. A set of evaluation standards using criticality analyzing approach are established. This method is applied in many plants and is verified with the actual condition of plant requirement. The evaluation results fit for the criticality of all plants and will be different in different plants because of service and functional role played even for the same type machine.
Application of Three-Cornered Hats for Frequency Stability Analysis of Atomic Clock
Authors: Liu Zeng Jun , Yang Wen Ke , Lv Zhi Cheng , Zhu Xiang Wei , Ou Gang
Published: December 2012

Three-Cornered Hats is a classical method to obtain the frequency stability of one single atomic clock without more stable frequency standards available. In this paper, the measurement data of three hydrogen masers in a ground station is used to analyze the frequency stability of one single atomic clock. The analysis steps and problems in application of this method are introduced. The negative values of the calculated Allan variance of one clock with averaging time larger than 4000s occur. It probably implies that the hypothesis of uncorrelated clocks is not acceptable, which will be analyzed further.
Incorporating the Testing-Effort Function into the Inflected S-Shaped NHPP Software Reliability Model
Authors: Zhao Qian , Yu Xian Feng , Zhang Cheng Wei
Published: December 2012

Considering testing effort and imperfect debugging in reliability modeling process may further improve the fitting and prediction results of software reliability growth models (SRGMs). For describing the S-shaped varying trend of the testing-effort increasing rate more accurately, this paper first proposes a inflected S-shaped testing effort function (IS-TEF). Then this new TEF is incorporated into the inflected S-shaped NHPP SRGMs for obtaining a new NHPP SRGMs which consider S-shaped TEF (IS-TEFM-IS). Finally the IS-TEFM-IS and several comparison NHPP SRGMs are applied into two real failure data-sets respectively for investigating the fitting power of the IS-TEFM-IS. The experimental results show that the inflected S-shaped NHPP SRGM considering IS-TEF yields the best accurate estimation results than the other comparison SRGMs.
Fault Diagnosis Expert System for Special Electronic Equipment Based on the Fuzzy Neural Network
Authors: Yin Xue Zhong , Wang Jie Gui
Published: December 2012

In order to improve the efficiency and reliability of fault diagnosis for the special electronic equipment, an intelligent fault diagnostic model based on Fuzzy Neural Network (FNN) is proposed. Firstly, the fault diagnosis model based on the FNN Expert System (ES) is built. Secondly, the fault diagnosis expert system of the special electronic equipment based on this model is introduced. Finally, experiments show that the proposed model is correct and the FD system is effective. Moreover, the given method provides a new way of fault diagnosis for other modern electronic system.
Coarse Alignment for SINS Using Gravity in the Inertial Frame Based on Attitude Quaternion
Authors: Zhou Wei Dong , Ma Hui , Ji Yu Ren , Song Jian Li
Published: December 2012

In order to solve the problems of coarse alignment on swaying base of SINS, a novel method based on attitude quaternion is proposed. A decomposition of the objective initial attitude quaternion is given firstly. The time-varying parts can be derived from the quaternion update, and the invariable part can be obtained by using the integration of gravity. The problem finally becomes the Wahba’s problem. By using the FORM algorithm, the calculating process is optimized and the method can be easily used in engineering application. The final simulation verifies that the method proposed has higher accuracy than conventional methods.
An Identification System for Classifying Nonwoven Quality
Authors: Wang Shu Wen , Su Te Li
Published: December 2012

Fabric defect detection and classification plays a very import role in automatic inspection for textile. With the use of wavelet transformation and gray-level co-occurrence matrix to extract feature value of nonwoven image, then grey relational analysis of grey theory is availed to conduct the classification of uniformity of nonwoven. Of these processes, they care carried out mainly to discover uneven images for nonwoven, and proceed with classification study. Grey relation analysis can be used to find out the relation with selection feature indicators upon each factor to be studied and analyzed through some images processing through random factor sequence, and the highest relation is followed to determine the uneven images for nonwoven.
A Wood Color Classifier Based on CAV and SVM
Authors: Hu Xing Yu , Wang Pei Liang , Xu Jing Yun
Published: December 2012

A wood color grading method based on the characteristics of wood images and support vector machine(SVM). A high-performance color charge-coupled device camera captures color from wood samples and transmits images to the computer, then Hue from Munsell color system (HSI) and color vector angle (CVA) are used to characterize wood color of samples for the comparative purpose.These eigenvalues build two training sets,using support vector machine to establish the color classifiers,and test each classifier.The experimental results show that, the classification method based on the CVA and support vector machine can quickly and accurately estimate the level of the color of the wood materials, improve the level of automation and production efficiency in the wood processing.
Study on the Dual-Frequency Excited Electromagnetic Flowmeter
Authors: Liu Tie Jun , Chen Yin Jia
Published: December 2012

A time-division dual-frequency excitation scheme was proposed as an improvement to the traditional electromagnetic flowmeters. The proposed scheme keeps the advantage of zero-point stability of the traditional design, the immunity to low frequency noise is enhanced, and the response to fast change of fluid velocity is improved. A prototype flowmeter was made based on the proposed design, experiment results show that the prototype flowmeter can measure water flow in a wide velocity range with satisfactory accuracy.
Design of Digital Advertising Screen Display
Authors: He Juan , Chen Lian Gui
Published: December 2012

Design of LCD(liquid crystal display) screen system based on DSP has been put forward. There are two parts of the hardware interface circuit and the software design about whole system. Chinese characters, characters and graphics can be displayed in the LCD system. The result of simulation shows that the system can effectively solve the drive and display of LCD based on DSP and can save resources for I /O port. This design will offers a certain reference value for a variety of display terminal design of the portable system. The simulation shows that the system can realize the basic expected goal.
Life Cycle Cost Model of Power Transformer under the New Environment
Authors: Hu Jing , Li Kai , Ma Rui
Published: December 2012

Life Cycle Cost (LCC) Management is not only an advanced management concept but also an effective way to achieve the integration of high-efficacy and low-cost assets. In the meantime, the State Grid Corporation promotes the “Large Five” system that novel environment provides new opportunities and challenges to the life cycle cost management. Therefore, this paper puts forward a transformer cycle cost model which adapts to the new environment, combining with new features of the “Large Five” system construction, basing on the whole life cycle cost theory and according to the actual operation of the transformer. It also analyzes the cost composition of transformer’s life cycle and verifies the validity of the transformer cycle cost model which has been put forward in this paper through calculating examples.
Research on High Frequency and High Voltage Switching Power Supply for Electrostatic Precipitator
Authors: Han Gu Jing , Deng Jing Lei , Xu Dong
Published: December 2012

Electrostatic precipitator is the efficient dust removal equipment for environmental protection. As the core part, high voltage inverter power supply determines the efficiency and effect of dust removal. This paper design a high frequency and high voltage switching power supply for electrostatic precipitator based on FPGA. The power supply system is composed of rectifier and filter circuit, high frequency inverter circuit, step-up transformer and high voltage rectifier silicon reactor circuit. Using IRFP460N as power switches, single-phase full-bridge inverter was set up. The SPWM signals produced by FPGA EP2C5T144C8 were isolated and amplified through drive circuit IR2110. The function of variable frequency and voltage was realized. Hardware test showed the whole system operated safely and reliably.
Short-Circuit Model and Simulation Characteristics of Synchronous Generators
Authors: Song Wan Qing , Liu Qi Zhong , Teng Xu Dong , Yu Chao Gang
Published: December 2012

In this paper, the electrical transient mode of synchronous generators is studied, four different simulation model of synchronous generator on sudden short circuit was built, various physical quantities were studied by simulation during the short circuit. By comparing theoretics with simulation, various physical quantities of synchronous generator produced tremendous impact and surge during the sudden circuit and they stabilized in the proceeding state of short circuit. Thoroughly simulation analyzed, the results of simulation are identical with theoretical analysis. The simulation results show that these influence factors should be considered when we design the relay protections.
Research and Development of Test Platform for Plug-In Fuel Cell Vehicle’s Hydrogen Management System
Authors: Li Ling , Lai Xu Nian , Liang Wei Ming , Wang Bing Long , Liu Fen
Published: December 2012

Due to the features of complicated test environment, variable parameters, and limited conditions in real car experiment, it has proposed a Hardware-in-Loop test platform in this paper for Hydrogen Management System (Short for HMS) based on hardware of NI PXI and software of NI Labview to plug-in fuel cell vehicle. According to HMS’s control strategy, I/O signal map, CAN communication and sensor characteristics, it has designed the hardware configuration, software program, test interface, and rapidly made validation to control logic and fault diagnosis of Hydrogen Management Unit (Short for HMU). The experiment result shows that this test platform is effective for HMU control logic validation, system status monitor, fault injection, fault tracing, and it can shorten the vehicle research and development cycle, reduce the development cost, optimize test environment and promise safety for test engineer. This test platform will make good effect to vehicle electrical system development and supply reference for vehicle test.
A Novel Type of Solid-State Soft-Starter
Authors: Xu Zheng Wang , Wang Hui
Published: December 2012

Among the modern industry, soft-starter has taken an important role in large-capacity motor systems. But all kinds of using soft-starters have some shortcomings, their application is restricted because of that. This article describes a type of solid-state soft-starter with a novel structure, in which a rectifier bridge structure is used in stead of the traditional antiparallel structure. Its same points and differentia are analyzed comparing with the traditional soft-starters. The new soft-starter overcomes some traditional shortcomings. It can be used for both low voltage and high voltage motor starting. Especially, when applied to a high-voltage motor starting, it has the advantage of simple structure and high reliability. This kind of soft-starters can be used in broad application prospects.
The Research of The Pulse Power Source Sequential Control System
Authors: Gu Jin Liang , Luo Hong E , Dou Lei , Shen Na , Xia Yan , Tie Huei , Li Zhen Xiao , Li Bao Ming
Published: December 2012

The pulse power source; Control system; Sequential control; Trigger control Abstract. In this essay, the working process of Capacitor-Based Pulsed-Power System and the requirement of the sequential control component applied in such system has been discussed. Based on that, further description of the composition and working principle of the sequential control system has been made .The diagram of each block of the sequential control system are displayed to illustrate the working process in engineering application and problems would confront in engineering designing process. Finally, the charging and discharging test and electromagnetic emission experiments have been conducted and prove that such sequential control system can function stably and reliably in strong electromagnetic interference environment and it also has good expansibility.
Design and Development of Electric-Bus Battery Swap Control System Based on Quantum Platform
Authors: Wang Ying Hui , He Yang , Liu Xian Tao
Published: December 2012

It takes a long time to replenish energy for electric-bus by charging, while battery swap is an effective way with fast energy supplement ability. The process of electric-bus battery swap is complex, how to realize automatic, efficient and reliable battery swap is an urgent problem to be solved. This paper analyzed the electric-bus battery swap system, and then constructed the control model of battery swap according to state machine theory, finally developed a battery swap control system based on Quantum Platform framework. The battery swap control system has been applied to many electric-bus battery swap stations; it improves the station’s efficiency and reliability greatly, and provides a guarantee for the popularization and application of electric-bus.
Design of Test System for one Type of Airborne Photoelectric Equipment Based on PC104 Bus
Authors: Hou Man Yi , Fan Hui Lin , Jing Xian Yong
Published: December 2012

A certain type of airborne photoelectric equipment is the key device for aiming and distance measuring. On the basis of analyzing the test requirement of the equipment, a test system is designed with PC104 embedded computer as the core control system. The function of the test system is suggested. Hardware programs of power, bus board, signal conditioning circuit and anti-jamming measure are designed. The multithreading technology and measures to prevent wrong data communicating are applied to develop software of the test system. The test system can be applied to test and debug the photoelectric equipment. The data handling technology used in the test equipment has advantages as high speed, high efficiency and high reliability.
Study on Surface Acoustic Wave Air Flow Sensor for Vehicle
Authors: Tan Jia Jun , Wan Zhou , Xiong Xin , Li Fei , Li Shi
Published: December 2012

Air-fuel ratio, a major parameter of petrol engineer, directly affects the power, economy and indicators of exhaust emission of engine. To make the air-fuel ratio in the best state, the air flow entering into cylinder must be measured accurately. Due to gaseous property of air itself, the flow detection is greatly interfered by temperature and pressure. In the article, we used surface acoustic wave(SAW) technique combined with temperature and pressure compensation and made a detection device for engine intake, which was less interfered by temperature and pressure with high accuracy and wide measuring range. The paper introduced the working principle of SAW air flow sensor and its mathematic model, and discussed the development, signal detection and error processing of sensor. The results showed that SAW sensor could better overcome the interference of temperature and pressure, and then accurately got the air flow value of engine with preferable repeatability and reliability.
Temperature Compensation System of Diesel Engine Piezoresistive Pressure Transducer Based on Neural Networks and LabVIEW
Authors: Tong Zhao Jing , Shi Xiu Hua , Du Xiang Dang , Wang Sheng Wu , He Tian Peng
Published: December 2012

The work presented in this paper focuses on the output of temperature compensation system of diesel engine piezoresistive pressure transducer, it is nonlinear and influenced easily by environmental temperature. The paper studied the method of using improved neural network algorithm based on LabVIEW and MATLAB to increase the precision and efficiency of pressure detection. In order to eliminate the temperature influence, this paper proposed the method of using improved back propagation neural network on LabVIEW platform, which realized the communication between LabVIEW and MATLAB. The experimental results show that, with the using of Matlab Script node, the system benefits from the huge computing power of MATLAB to train the network based on the static calibration data of transducer, and makes temperature compensation more efficient and accurate.
An Energy Efficient Routing Protocol Based on the Shortest Path in Mobile-Sink Wireless Sensor Networks
Authors: Chen Ming , Xu Xu Min , Zhang Shao Hui , Feng Guo Fu
Published: December 2012

Energy consumption phenomenon has always been noticed in sink-based wireless sensor networks. This paper explored an energy efficient routing protocol with a mobile sink based on the shortest path data transmission mode. According to the position of the sink node and the common nodes' ID in the network, we calculated the coordinate value of each node in the network. By comparing the coordinate values to choose the shortest path to forward the data. Simulation results show that this method can prolong the lifetime of the network and improve the energy utilization ratio of nodes.
Mechanism and Simulation of Bi-Layered Micro Optical Fiber Resonator
Authors: Zhang Shao Jun , Liu Yue Ming , Huangfu Xiao Hong
Published: December 2012

Micro-resonators could be fabricated directly on the optical fiber top by micro mechanical process. The micro optical fiber resonator has more great advantages comparing with the traditional optical excited micro silicon resonators, such as being optically positioned easily between the resonator and the optical fiber end. By this way, the optical excited light through the fiber core is thus put on the micro resonator accurately and then partially reflected by the Fabry-Perot interferometer formed between fiber top and resonator surface. The reflected light from F-P interferometer was sent to the opto-electric detector PIN to demodulate the detected parameter. A matched metal layer can be deposited atop of the resonator in order to increase the optical excitation efficiency. Firstly mechanism analysis of optical excited bi-layered resonator is given by fully considering Longitudinal thermal strain effect and Bi-coating effect, and then the typical theoretical models were setup including the resonating frequency and resonant amplitude, and temperature sensing feature was simulated by computer software. The simulation results indicated that the average frequency sensitivity of temperature sensing is about 29Hz/°C.
Experimental Research on the Acceleration Sensitivity of Quartz Crystal Oscillators
Authors: Ji Long Zhe , Shan Qing Xiao , Yang Jun , Lin Ming
Published: December 2012

Quartz crystal oscillators are often used as the reference frequency sources, but they are very sensitive to accelerations. This paper discussed how accelerations affect oscillators’ frequency stability. The frequency shifts caused by gravity was shown through 2g-tipover experiment. Then a vibration experiment system was built up, which consist of the vibrating platform, the controlling part, the measuring part and the oscillator. We studied the relationship between accelerations and oscillator’s frequency shifts by imposing sinusoidal and random vibrations onto the oscillator and observing the phase noise degradation via signal source analyzer. The paper also brought up the measuring method of the acceleration sensitivity vector.
Thermo-Sensing System Using a 3D Measurement Sensor (Kinect Sensor)
Authors: Li Tao , Kawasue Kikuhito
Published: December 2012

This paper presents an investigation of the geometric quality of three-dimensional data obtained by a thermal-sensing system. On the basis of the presented mathematical model, it is possible to detect not only the three-dimensional shape but also the temperature distribution of an object. Here, the whole 3D shape of the object is reconstructed using the ICP (Iterative Closest Point) algorithm. The measurement system is established using a three-dimensional measurement sensor (Kinect) and thermographic device. Since the three-dimensional surface shape of the object can be measured using the 3D sensor, and the corresponding temperature data obtained by thermography can be allocated to the reconstructed surface of the object on a computer, the data can be used for a quantitative analysis of heat radiation by considering the area and the roughness of the heat source object. Experimental results show the feasibility of the measurement system.
The Simulation Technology Research of Hall Current Sensor
Authors: Huang Shi Ze , He Ya Jie , Guo Qi Yi
Published: December 2012

Hall current sensor is a new generation industrial sensors which was widely used in electrical measurement. After introducing the current measurement by hall sensor, the 3D model of current-carrying conductor was built by ANSYS, and the effect caused by current-carrying conductor’s shape and the position of hall sensor was analyzed. Along with the effect of electromagnetic field of adjacent phase current-carrying conductor, the ferromagnetic shield was proposed to reduce this effect and improve the measurement accuracy. The theoretical analysis is verified by the simulation results, which can do a lot in improving the product.
Application of D-S Theory in Information Fusion of Water Quality Measurement Sensors
Authors: Li Hai Feng , Zuo Hui , Hua Xu Feng
Published: December 2012

This paper issues the D-S evidence theory and modifies the fusion rule according to the relation of time and the NH3 content in water. A few concepts of D-S evidence theory and D-S evidence combination rule are presented. The modified D-S algorithm is simulated in time and space fusion of multi-sensor measurement system information. It could distinguish the main factor that changing the NH3 content in water. The measurement system cost could be decreased.
RFID Indoor Localization Algorithm Based on PSO
Authors: Wen Pei Zhi , Su Ting Ting , Li Li Fang
Published: December 2012

In order to improve the positioning accuracy and reduce the localization cost, a kind of PSO-based RFID indoor localization algorithm is proposed in this paper. The main idea of this algorithm contains the following two aspects. First, due to the influence of none line of sight and multipath transmission in indoor environment, we adopt Gaussian Smoothing Filter to process Received Signal Strength Indicator (RSSI) values, which can reduce the impact of environmental factors on the position estimation effectively. Second, Particle of Swarm Optimization (PSO) algorithm is introduced to obtain a better positioning result. By experimenting in different indoor environment, the results demonstrate that the proposed approach can not only improve the precision of indoor localization, but has a lower cost and better robustness when compared to VIRE approach.
Research on a New Stress Sensor Based on the Amorphous Alloy
Authors: Liu Cheng Wen
Published: December 2012

Amorphous alloy material has good soft magnetic properties, so it can be used for stress measurement. At first, the working principle of the stress measurement was analyzed. Secondly its output characteristic mathematical model was established by adopting multivariate linear regression analysis method, and the simulation of the mathematical model was made based on Matlab. Finally a practice measurement with Fe-base TM—M Amorphous alloy was completed. The results of the test have showed that the stress measurement method has some characteristics of being sensitiveness to measure and simple to make a testing system, and a promising method of measuring stress.
PWM Controlled Proportional Equipment
Authors: Avram Mihai , Bucşan Constantin , Cartal Laurenţiu Adrian , Duminică Despina
Published: December 2012

The paper presents an experimental model of PWM controlled proportional pneumatic direction control valve developed by the authors, as well as the functioning of a pneumatic system that incorporates the original solution of valve. The main parameters that control the system can be settled using a software application developed for that purpose.
Operations Management in Water and Wastewater Treatment Plants
Authors: Georgescu Vlad Cristian
Published: December 2012

This paper explains the necessity of implementing Operations Management Software (OMS) in SCADA systems, by highlighting the benefits of OMS in water and wastewater plants. The modern approach for implementing this kind of system in a Service Oriented Architecture (SOA) is also presented, with examples of existing systems.
Experimental Investigation of Cutting Forces at Milling Titanium Alloys Comparing to Others Hard Alloys
Authors: Serboi Claudia , Velicu Stefan , Bisu Claudiu , Anania Dorel
Published: December 2012

This paper presents the experimental procedure of cutting forces measurement, results of the experimental research and their interpretation for the milling of titanium alloys comparing to other hard alloys. Furthermore, there are established the polynomial regression functions to determine the cutting forces depending on the cutting regime parameters: cutting speed, feed rate and depth of cut.
SCADA System for Controlling the Coilers from a Metal Extrusion Press
Authors: Ciupitu Liviu , Dunareanu Mihai , Brotac Sorin , Ivanescu Andrei Nick
Published: December 2012

Present article is focusing to the control of the coiler devices of an extrusion press of 2500 tons-force used in order to obtain coiled wires of brass and copper. The driving of coiler devices is done by another hydraulic system than the main hydraulic system of extrusion machine, with 2 rotary hydraulic motors for each coiling unit. Maintaining the synchronization between the speed of press’s ram during the pressing and the rotation of coilers during the coiling, in case of hydraulic driving, is a difficult task and the main goal of present paper.
Dynamical Behavior of Milling Machine Spindle
Authors: Doina Marin , Dan Mihail Marin
Published: December 2012

The spindle assembly is the most essential parts of the machine tool. The dynamic characteristics of the spindle assembly affect the performance of NC machine tool and for this reason should be studied. This paper presents a comparative analysis of theoretical and experimental dynamic behavior of no-load operation of a spindle for a vertical milling machine. Research has been conducted to highlight the natural vibrations mode and the directions that the system is more rigid. Study presents a support for the spindle analysis, so that the adoption of a constructive solution to be optimal.
Amphibious Vehicle Abilities Analysis
Authors: Vintr Zdenek
Published: December 2012

The article deals with a solution of selected problems associated with evaluation of armoured vehicles flotation ability. Main attention is devoted to analysis of possible methods of vehicle ability evaluation to pass over a water obstacle with respect to its current speed.
A Model Analysis and Validation of a Pneumatic Muscle Made from Advanced Materials
Authors: Visan Alexandra Liana , Belforte Guido
Published: December 2012

This paper aims to present a first part of research carried out on pneumatic muscles. The first applications of these actuators were in the innovative research areas as: rehabilitation medical equipments, prosthesis, robotics and exoskeletons. Despite of a large number of applications, theoretical and experimental research in this area are not many, due to there complex structure in which are used new materials, a combination synthetic rubber membrane and polymers fibers. In this article will be presented the experimental results of a specific pneumatic muscle based on which it will be realized a mathematical model to describe its behavior and to determine the parameters that influence largely static and dynamic feature.
Backstepping Control of Electrical Load Simulator with Adaptive Tracking Performance Controller
Authors: Ullah Nasim , Wang Shao Ping
Published: December 2012

Electrical Load simulator (ELS) is an important aerodynamics forces/torque loading device which is used for qualification of flight actuation system in ground based experiments. This paper focuses on Backstepping control design with fuzzy logic compensator for extra torque disturbance. To reduce number of fuzzy rules and processing time LuGre model based friction compensation scheme is proposed. Practically fuzzy logic compensation may induce approximation error. A novel PI type tracking performance controller is proposed to compensate tracking error due to parametric uncertainty in the ELS system and LuGre friction model. The tracking performance controller is tuned online based on saturation function based adaptive law derived from the error dynamics between state predictor and actual plant to eliminate chattering from control signal. The validity of control scheme is verified using numerical simulations for desired tracking performance.
About Buckling Bio-Composite Sandwich Bars
Authors: Suciu Mihaela
Published: December 2012

Abstract. The bio-composites materials are very important for a lot of industry and life domains, particularly in the aeronautic industries and medicine, in orthopedics. Titanium and its alloys are most widely used, due to their mechanical properties similar to bone tissue. The sandwich structures are very light, they have a high stiffness in flexion and very good thermal characteristics. For the compressed sandwich structures, risks of buckling are higher than the conventional compressed structures, limited by a critical value of the applied force, then the deformations grow in importance and uncontrolled manner. We try to calculate the critical buckling force by the method presented in [2].
Study of Straight and Oblique Mandible Fracture Behavior in the Chin Section
Authors: Valášek Jiří , Ebringerová Veronika , Řehák Kamil , Krpalek David , Florian Zdeněk
Published: December 2012

. This work is focused on stress - strain analysis of a mandible fracture behavior in the case of straight and oblique fracture. For this problem the computational modelling was chosen with using finite element method. Mandible was created based on the 3D scanning and CT images. Using these procedures a STL model of mandible with cortical and cancellous bone tissue was created. A volume model of lower jaw with applied reconstruction plate was created in CAD software. Fracture in the chin region was modelled directly in the program ANSYS. The cancellous bone tissue is modeled with different mechanical properties, which corresponds to the varying quality of this tissue. An assessment of differences in the behavior of straight and oblique fracture is presented in this work.
A New Design of Signal Source for Crosstalk Test of Multi-Channel Data Acquisition System
Authors: Shan Yan Hu , Ren Yong Feng , Zhen Guo Yong , Jiao Xin Quan
Published: December 2012

For the multi-channel data acquisition system, crosstalk significantly affects the sample accuracy. Through analyzing the mode of multiplexer and the sampling timing sequence, we demonstrated that crosstalk effect mainly results from the switch of multiplexer for the low- frequency multi-channel data acquisition system. A new crosstalk testing method based on phase-shift rectangular waveform for the multi-channel data acquisition system was proposed. The phase-shift rectangular waveform was designed. Experiments were conducted to test crosstalk effect of the multi-channel data acquisition system. The experimental results were demonstrated that the proposed approach based on the phase-shift rectangular waveform exhibits a distinct feature in effective channel crosstalk testing, compared with waveforms of other types. Thus, the proposed method is effective to detect crosstalk of the multi-channel data acquisition system.
Hydrogen Storage of Platinum Atoms Adsorbed on Graphene: First-Principles Plane Wave Calculations
Authors: He Ye Lu , Wang Shu Xia
Published: December 2012

The geometrical structures of platinum atoms adsorbed on graphene were optimized using plane wave pseudopotential method with generalized gradient approximation based upon the density functional theory. Adsorption energies of both intrinsic graphene and platinum atoms adsorbed on graphene were calculated theoretically. The results show that: Compared with the intrinsic, H2 molecules are strongly adsorbed onto the platinum atoms adsorbed on graphene with higher adsorbed energy. The difference between the highest hydrogen molecule occupied molecular orbital and the 1owest unoccupied molecular orbital is significantly reduced. Between hydrogen and other atoms, the charge transfers are apparent increased. All are help for hydrogen storage.