bluuebunny/crossref_metadata_2025 huggingface dataset:
The Emdros Text Database Engine as a Platform for Persuasive Computing
Authors: Sandborg-Petersen Ulrik
Published: January 2014

This paper describes the nature and scope of Emdros, a text database engine for annotated text. Three case-studies of persuasive learning systems using Emdros as an important architectural component are described, and their status as to participation in the three legs of BJ Fogg's Functional Triad of Persuasive Design is assessed. Various properties of Emdros are discussed, both with respect to competing systems, and with respect to the three case studies. It is argued that these properties together enable Emdros to form part of the foundation for a large class of systems whose primary function involves text being stored in or retrieved from a database.
On Being a Peer
Authors: Bertel Lykke Brogaard , Rasmussen Dorte Malig
Published: January 2014

This paper investigates and discusses the persuasive principles of social actors in relation to other theories of technologies as social agents, particularly within the field of Social Robotics and Persuasive Educational and Entertainment Robotics (PEERs). Based on related research and results from a case study on social robots as persuasive social actors in education an extension of the persuasive principles is proposed and related design guidelines for Persuasive Technology as social actors in teaching are presented.
Extensible Business Reporting Language (XBRL): Potential of Research in XBRL as a Social Artifact- An Essay
Authors: Pathak Jagdish
Published: January 2014

In this brief theoretical narrative, the author intends to present a thought piece which would suggest that study of eXtensible Business Reporting Language (XBRL) is not relevant to technological or financial domains alone. XBRL usage in the World of finance can easily bring out its impact on the society at large through its users in the finance and investment areas. XBRL is simply not a technological artifact alone but has turned into a social artifact. The author, therefore, proposes that future researchers of information systems should also look into the impact of XBRL on the society as a whole. This essay takes a foundational step toward a paradigm and suggests how one might usefully augment further studies with research on XBRL as social artifacts.
Advances in Truck Scheduling at a Cross Dock Facility
Authors: Golias Mihalis M. , Saharidis Georgios K. D. , Ivey Stephanie , Haralambides Hercules E.
Published: January 2014

In this paper the authors deal with the scheduling of inbound and outbound trucks to the available inbound and outbound doors at a cross dock facility. They assume that all trucks served at the facility need to meet several deadlines for deliveries and pick-ups and thus request a departure time window from the facility, penalizing the facility operator, on a unit of time basis, if that deadline is not met. To solve the resulting problem with reasonable computational effort, a memetic algorithm is developed and a number of computational examples show the efficiency of the proposed solution algorithm and the advantages of scheduling inbound and outbound trucks simultaneously, as opposed to sequentially.
CAM
Authors: Athenikos Sofia J. , Song Il-Yeol
Published: January 2014

The problem of identifying relevant classes (entities) and associations (relationships) is a fundamental problem for conceptual modeling. In a previous work the authors introduced a conceptual modeling methodology named OMP (Ontology-based Modeling Patterns), which is based on the analysis of class categories representing entity types that are organized in the form of ontology. Since then the authors have explored a way to improve the methodology. As a result, in this paper the authors introduce a new conceptual modeling framework, entitled CAM (Class/Association-analysis-based Modeling), which is based on the analysis and classification of association types as well as entity types. The main objective of CAM is to serve as a tool to facilitate teaching the fundamentals of conceptual modeling to students in a systematic way, by providing extensible and adaptable entity/association classificatory systems that can be directly used in the problem-solving process. In this paper the authors present the CAM framework and illustrate its application.
A Study of Unidirectional Driving Circuit of Piezoelectric Device Considering Energy Recovery
Authors: Hong Sun Ki , Lee Jung Seop , Byeon Nam Hee , Kang Taesam
Published: January 2014

Common R or R-L load do not need special inverter circuits, however piezoelectric load can be considered as R-C load and its voltage does not become 0 even though the applied voltage is 0. Therefore it needs some special inverter with circuit that can discharge the capacitive energy. Especially for unidirectional square-wave voltage driving, it becomes more serious problem. In this paper, an energy recovery circuit for unidirectional square-wave voltage driving for piezoelectric load is proposed. With the circuit, the peak load current and the power supply capacity can be reduced because the energy in the load capacitor is saved to a capacitor for energy recovery and recharged from the capacitor. The appropriateness is proved from the simulation of the proposed circuit.
Nonlinear Modeling of Electrical Equivalent Circuit of Rotary Traveling Wave Ultrasonic Motor
Authors: Zhao Ying Ying , Cai Min , Tang Yuan Xing , Li Wen Shi
Published: January 2014

It has difficulty in nonlinear modeling of performance characteristic of ultrasonic motor for its complex micro-structure. Through matching three sets of Vpp-Imdata measured near the resonance frequencies of five ultrasonic motors, we run PSIM 6.0 to extract a new model in which nonlinear resistance and micro capacitance are tuned till touching the minimum relative errors between model Vpp(mean)-I1 data and measured Vpp-Imdata. The experimental results show that five key parameters of this model match for actual driving data of ultrasonic motors with diameter of 45mm and their waveforms show well too. This work will provide both compact ideas for future nonlinear modeling and applied simulation basis for its ASIC design.
A Development and Optimization of Broadcast Live System
Authors: Lu Yi , Li Zhao Fang , Pan Yu
Published: January 2014

A combination of live radio and TV recording is applied in television production generally, during the current process of live broadcast. On the construction of live system, some subsystems such as camera control systemvideo signal PIP processing systemprogram material acquisition system etc are developed through continuous exploration. Each hardware construction and sofeware optimization of the total system is shown in this paper correspondingly.
The Effect of the Microstructure of Semisolid Al Alloy on its Rheology
Authors: Cao De Wen , Wang Jia Huan , Sun Yu Qing , Chen Ke Hua , Yu Cheng Ming , Li Ping Ju
Published: January 2014

In the present work, the effect of the microstructure of AlSi6Mg2 alloy on its macro-rheological behavior of the steady AlSi6Mg2 alloy is investigated. Specifically, the effect of particle size, packing mode and degree of the agglomeration of particles are analyzed. It can be seen that the apparent viscosity decreases with increasing the particle size (d) ifdis between a few μm and 200 μm, while the solid particle size does not affect viscosity except this region. This theoretical prediction is in qualitatively agreement with the experimental data. The trend of the variation of the average agglomerate size with the particle size is the same as the one of viscosity. The packing mode of solid particles in agglomerate is closely related to the solid volume fraction and the characteristics of the alloy system. Subsequently, the state of agglomeration of solid particles which determines the rheology of semisolid AlSi6Mg2 alloy, while the external flow conditions (such as shear rate) influence the viscosity by changing the state of agglomeration. Consequently, the particle size, the packing mode and the average agglomerate size have different effect on the rheological behavior of SSMS.
2D Contractile Water Jet Thruster Characterization for Bio-Inspired Underwater Robot Locomotion
Authors: Shaari M.F. , Samad Z.
Published: January 2014

This research was conducted to analyze the thrust performance generated from a two dimensional contractile water jet thruster (CWJT). The main aim of this research is to investigate the relation and reaction between the input parameters of the contractile water jet thruster. The major parameter of this study is the actuating force as the input and the thrust force as the output. In addition to these parameters, nozzle area and fluid velocity influence were also considered in the investigation. Two pneumatic cylinders were applied to actuate the contraction. Thrust force was measured by both experimentally and theoretically. Generally the increment of the contraction force increases the thrust force. However, generated thrust at different contraction force depends on the size of the nozzle.
Surface-Specific Catalytic Activity of Carbon Nanotube Encapsulated with Metal-Oxide Clusters
Authors: Wang Lei , Dong Chang Qing
Published: January 2014

It is first attempted to demonstrate the catalytic efficiency and structure-sensitivity reactions on the surface of carbon nanotube (CNT) encapsulated with metal oxide particle. The results shows that the encapsulated nanoparticle CuO activate the outer orbits of CNT, and hence the surface of CuO@CNT is chemically active for hydroxyl radical generation. The results obtained from DFT calculation and experiments verified the highly active of CuO@CNT catalysts for the generation of hydroxyl radicals, and the structure-sensitivity for the oxidation of dichlorophenol. This suggests a novel strategy to design well-defined interfaces, controlling the structure-sensitivity reaction, can hence markedly improve the performance of catalysts.
The Drive Control System of Micro Logistics Electric Vehicle
Authors: Zhang Jian Bao , Lu Chun Guang , Li Cheng Qun
Published: January 2014

Energy saving and environmental protection become two major topics in today's world. But with the rapid development of the global auto industry, energy consumption and environmental pollution problems also arise, so how to develop electric vehicles, especially how to promote the sustainable development of the electric car has become the outstanding problem faced by automotive industry in China. Motor drive system is the core component of the electric car, so it's extremely important to drive motor selection [. This paper mainly introduces the characteristics and performance of all kinds of drive motor, and determine the type of logistics in electric vehicle drive motor and the selection of drive position.
A CCTV Lens Robot with Four DOFs for Object Searching
Authors: Yang Xiao Ping , Qiu Quan Li
Published: January 2014

Nowadays CCTV surveillance system can be seen everywhere in our cities[. The limited monitoring range is the main problem for its application. Although some of the monitoring unit bracket allows the camera to search within a certain range, its huge size severely limits its use in some conditions. For example, it is not appropriate to apply in a small space[. Considering this, we design a small space rotating device which can make the camera rotate around the X and Y about 40 degrees respectively. Experiments show that the CCTV rotation bracket has its features such as compact, light weighted structure and easy to control. It is suitable for application on the small size device.
Covering an Unknown Area with an RFID-Enabled Robot Swarm
Authors: Puusepp Andres , Tammet Tanel , Reilent Enar
Published: January 2014

Our goal is to improve the coverage of an area using robots with simple sensors and simple, robust algorithms usable for any kind of room. We investigate the advantage of the swarm - compared to a single robot - and three different algorithms for the task of searching landmarks in a previously unknown area. The guidance of the robot is based on landmarks, implemented by RFID tags irregularly placed in the room. The experiments are conducted using a custom made simulator of RFID-equipped Roomba cleaning robots, based on our previous work with real-life Roomba swarms. We show that for the simple room coverage algorithms the speedup gained from increasing the size of the swarm diminishes as the swarm grows and most importantly, for larger swarm sizes the information available and the intelligence of the algorithm becomes less important.
Analysis and Simulation of Meteorological Wind Fields Based on Wavelet Transform
Authors: Jin Fo Rong , Wang Wei Rong
Published: January 2014

In this work, we examined the non Gauss distribution characteristic and evolution law of the wavelet coefficient of a gust using wavelet transform; according to the time-frequency characteristic, the wavelet transform coefficients and the energy relations of the target velocity spectra are derived; the wavelet coefficient is generated using the cascade model reflecting the turbulent intermittent; the unsteady gust artificial generation method is established based on inverse wavelet transform; and the arbitrary unsteady fluctuation law can be generated by regulating the coefficient of low frequency. The results show that: the natural gust is in good agreement with Karman wind speed spectrum, meets the turbulence-5 / 3 law in the inertial subrange, and exhibits the nature of intermittence and local self-similarity; the artificial wind sequence based on the inverse wavelet transform method shows similar turbulence statistics with natural gust, with which, the effectiveness of the method is confirmed.
A Motion Image Detection Method Based on the Inter-Frame Difference Method
Authors: Cheng Yuan Hang , Wang Jing
Published: January 2014

Mobile robot vision system based on image information on environment, to make it automatic separation from obstacles and achieve precise mathematical description of obstacles, we construct detection model which combined by the frame difference method and background subtraction for target detection, comprehensive utilization of the main idea of three frame difference image method, the background subtraction and frame difference method combined to complement each other, thereby overcoming each other's weaknesses and improving the effect of target detection, experiment results show that this method can effectively improve the efficiency of target detection.
Wireless Distributed Data Acquisition System for EIT
Authors: Li Peng , Fang Xi , Chen Zi Peng , Li Zhuo Qiu
Published: January 2014

In recently years, Electrical Impedance Tomography caused concern for people in the areas such as non-destructive testing and structural health monitoring. This paper took the disk structure composed of carbon fiber felt for example, designed and built the experiment platform for Electrical Impedance Tomography in a couple of different ways: one was traditional and the other was distributed acquisition system based on wireless sensor network. The imaging result showed that the data collected from wireless distributed system were more accurate and efficient.
A Novel Weighted Dynamic Time Warping for Light Weight Speaker-Dependent Speech Recognition in Noisy and Bad Recording Conditions
Authors: Zhang Xiang Lilan , Sun Ji Ping , Huang Xu Hui , Luo Zhi Gang
Published: January 2014

Lightweight speaker-dependent (SD) automatic speech recognition (ASR) is a promising solution for the problems of possibility of disclosing personal privacy and difficulty of obtaining training material for many seldom used English words and (often non-English) names. Dynamic time warping (DTW) algorithm is the state-of-the-art algorithm for small foot-print SD ASR applications, which have limited storage space and small vocabulary. In our previous work, we have successfully developed two fast and accurate DTW variations for clean speech data. However, speech recognition in adverse conditions is still a big challenge. In order to improve recognition accuracy in noisy and bad recording conditions, such as too high or low recording volume, we introduce a novel weighted DTW method. This method defines a feature index for each time frame of training data, and then applies it to the core DTW process to tune the final alignment score. With extensive experiments on one representative SD dataset of three speakers' recordings, our method achieves better accuracy than DTW, where 0.5% relative reduction of error rate (RRER) on clean speech data and 7.5% RRER on noisy and bad recording speech data. To the best of our knowledge, our new weighted DTW is the first weighted DTW method specially designed for speech data in noisy and bad recording conditions.
Numerical Analysis of Interaction of Single Pile and Soil Based on ADINA
Authors: Meng Kun , Cui Chun Yi , Sun Yan
Published: January 2014

The interaction between pile and soil can not be ignored in the seismic analysis of long-span bridges. Earthquake action in the form of lateral load apply on the pile through the soil, the analysis of pile under lateral load is very important in aseismatic analysis of bridge. Analysis of the horizontal load pile-soil interaction by using finite element analysis software ADINA, establishing the three-dimensional contact model of pile-soil interaction and the analysis model by using p-y curve model of soil-pile interaction respectively. Comparing the displacement of the top of pile with the actual measurements to verify the numerical method is right. It shows that the feasibility of using ADINA for pile-soil interaction analysis.
On Optimal Constellation Shaping for Wireless MIMO Relay Networks Based on Complex Field Network Coding
Authors: Zhou Xin , Guo Yi Jun , Hao Jian Jun
Published: January 2014

Network Coding (NC) is a promising technique that can maximize the network throughput. Multiple-Input-Multiple-Output (MIMO) detection technique is always combined with NC because they are both based on a similar system description. Two-way relay channel (TWRC) is the most common scene for the research on NC. However, TWRC is not a general case since it requires both users have information to exchange simultaneously. In this paper, a more general system model which adds a destination node is proposed. Based on this scene, for symmetrical and asymmetrical modulation schemes, we maximize the minimum Euclidean distance of the superposed constellation. The destination node never needs to have a packet exchange with the relay. Excellent performance has been proved by the theory analysis and simulation results.
Towards Real-Time Trinocular Visual Odometry
Authors: Jeong Jae Heon , Correll Nikolaus
Published: January 2014

Pose estimation of multi-camera rig which has not enough overlapping field of views for the stereo, is generally computationally expensive due to the offset of camera center and the bundle adjustment algorithm. We proposed a divide and conquer approach, which reduces the trinocular visual odometry problem to five monocular visual odometry problems, one for each individual camera sequence and two more using features matched temporally from consecutive images from the center to the left and right cameras, respectively. While this approach provides high accuracy over long distances in outdoor environment without requiring any additional sensors, it is computationally expensive, preventing real-time operation. In this paper, we evaluate trading off image resolution and frame rate to speed up computation with accuracy. Results show that scaling images down to a quarter of Full HD resolution can speed up computation by two orders of magnitude, while still providing acceptable accuracy, whereas dropping frames quickly deteriorates performance.
Numerical Simulation of Controlled Rolling of Heavy Plates with Low Compression Ratio
Authors: Feng Guang Hong , Zhang Hong Liang , Fan Jian Wen
Published: January 2014

The numerical simulation method was adopted to study the multi-pass controlled rolling deformation process of the 400mm thick slab and the changing rule of the internal strain field. It was tried to simulate the center strain changes of the thick slab by two deformation processes which were the first rolling deformation process under a uniformed temperature and the second rolling deformation process after the waiting. It was shown that in the rolling process of super-thick steel plate both the first rolling process and the second rolling process could control the deformation of the central region. When the macro pressure rate was the same, the thinner was the slab, the greater pressure rate in the central region. The amount of deformation of both the first process and the second one was the same as 20%. The maximum strain was located in nearly one-tenth thickness of the surface layer and the minimum was in the center.
Parallelism Measurement System of Porous Parts Based on Computer Vision
Authors: Guan Zhen Zhen , Yin Yu Jun , Yin Xiao Chun
Published: January 2014

Aiming at the problem of low accuracy, low efficiency in the parallelism measurement of porous workpiece, this paper proposes a parallelism measurement method based on computer vision technology. The images of both ends of the workpiece are acquired, after camera calibration, image distortion correction, two sides coordinate unification, filtering, edge extraction, circle calculation and a series of image preprocessing, parallelism can be calculated. The experiment shows that this method has high precision, high efficiency and it is simple to operate, it provides a new way for geometric measurement.
Effect of Surface Finishing on Filtration Performance of a Regenerable Filter Media
Authors: Mao Ning , Chang De Qiang , Liu Jing Xian , Sun Xi
Published: January 2014

The periodical filter cleaning process has a marked effect on the filtration performances of fabric filters. A model was proposed to express the non-uniformity of residual dust cake distribution after filter cleaning in a simpler manner, in which two parameters, i.e. the surface cleaning fraction, f , and the residual dust load on un-cleaned surface, RD , were introduced. Three filter media with different surface finishing were tested and f and RD were calculated by using the testing results. It can then be concluded that filter with surface finishing of calendar + singe has a better filter regeneration effect than that of singe + calendar. Lamination with PTFE membrane results in an excellent filter regeneration effect.
Intelligent Container Based on Thing of Internet Technologies
Authors: Xie Yu Chan , Chen Hai Yan
Published: January 2014

The internet of things will bring a new development of intelligent container industry. This paper introduces the concept of the internet of things and intelligent container, it will be the trend of the development of cargo is indicated, the architecture of the intelligent container technology based on the internet of things is proposed and workflow of the intelligent container is summarized. So the application can enable the share of information among logistics participants, making the information flow the transport stream to the same and developing the efficiency and security of the transportation of containers.
Measurement Method on the Absorption Coefficient of the Material with Large Dimension Based on Two-Microphone
Authors: Li Ran , Feng Tao , Wang Jing , Wu Yao
Published: January 2014

This paper is researching on methods to get the absorption coefficient of the material with large dimension. The absorption coefficient can be got by the source mirror method which the FRF of two pressure signals near the material surface in point source field is obtained. The influence of the factors such as the source height, the material size, horizontal distance and positions of two microphones on the accuracy was analyzed by experiments and the indirect boundary element method. The results from this method discussed in this paper are basically the same with that from the impedance tube.
Study on the Platform of Visual Producing Technology of Greenhouse by Solar Heat in Winter Based on Information Flow Model
Authors: Fang Hong , He Yu Xiang , Ma Qiang , Song Zhi Heng
Published: January 2014

The promoting platform of visual producing technology of greenhouse by solar heat in winter uses Windows XP as the operating system platform, IIS as the web server software, C# as the programming language of ASP.NET programs and SQL Server 2005 database technology to implement that the latest research and technology of greenhouse vegetable production by solar heat can be released and promoted in time. The system could solve the conflict that technicians cannot guide users in time and provide users with the service of producing technology instantly.
Research on the Whole Condition Loaded Noise Measurement Circuit of Power Capacitor
Authors: Huang Guo Xing , Li Zhi Yuan , Huang Yin , Lu You Meng
Published: January 2014

Power capacitor is one of the key equipments of the high-voltage direct current (HVDC) transmission system. It is also the main noise source difficult to control. Presently in the world, there are none explicit requirement and regulation on the evaluation and measurement of the noise generated by the power capacitor, which has seriously restricted the development of the further research on the noise control in power capacitor. So the research on the noise measurement method and technology has extremely important significance in scientifically evaluating the noise of power capacitor. Power capacitor in HVDC Converter Station under practical conditions has apparent fundamental frequency and rich harmonic frequency components. In order to simulate this condition, a whole condition loaded bridge circuit of noise measurement on power capacitor has been designed and studied. Two arms of the bridge are used to load fundamental frequency and a parallel resonance compensation inductance is used to reduce the fundamental current, while the other two arms are used to load harmonic frequency. The harmonic frequency load power supply composed of harmonic signal generator and power amplifier which can simultaneously load any combination of harmonics under 48th to simulate the various actual working conditions. The tests indicated that the noise spectrum measured under the designed circuit completely accorded with the one in HVDC Converter Station.
A Data-Driven Method of Engine Sensor on Line Fault Diagnosis and Recovery
Authors: Zhu Tie Bin , Lu Feng
Published: January 2014

Considering the requirements of convinced sensor measurements for engine control, a method of aircraft engine sensor on line fault diagnosis and recovery based on least squares support vector machine (LS-SVM) is proposed. First, sensor sets correlations are calculated and the sensor with high correlation is selected by correlation analysis. Then sensor LS-SVM prediction model is established with the sensor itself primary data series and used to sensor fault diagnosis. The sensor recovery module is obtained based on the LSSVM algorithm with the high correlated sensor set, and is activated as the sensor failure detected. Experimental results show that the engine sensor fault recognition rate is satisfied by the proposed method, and could be used to turbofan engine sensor fault diagnosis and data recovery.
An Autonomous Predicted Star Locations Algorithm for Star Sensor
Authors: Zheng Xun Jiang , Zhang Guang Jun , Li Bao Hua
Published: January 2014

The larger area threshold scan window in star image is scanned with conventional star tracking algorithm under large maneuvering of the vehicle. This results that the number of calculating angular separation between two stars is increased. So the update rate of star sensor is decreased and the feasibility of errors star locations is increased. So, an autonomous predicted star locations algorithm with high angle velocity is presented in this paper. Firstly, the actual star locations are obtained within the threshold scan window of corresponding ideal star locations calculated by last frame in the current star image. Secondly the current attitude information is calculated with the obtaining actual star locations. Thirdly, the next ideal attitude is calculated with current attitude and last attitude. Finally, the next ideal star locations are calculated with the next ideal attitude. At last the algorithm are tested not only simulation but also at night sky experiment with the angular speed maneuvering of aircraft is 5.208681°/s in 2013. And the algorithm has be applied star sensor of satellite GNC.
Research and Application of Adaptative Weighted p-Norm LS-SVM
Authors: Xie Pei Zhang , Zhou Xing Peng
Published: January 2014

In order to overcome some disadvantages of LS-SVM, such as noise-sensitive and less sparsity, adaptive weighted p-norm LS-SVM is proposed. Experiments shows that different data, using a different regularization(p) can improve the accuracy of the regression, where 1<p<2. p-norm LS-SVM can be convented to the form of compressed sensing, then it can be solved using IRLS. For each sample, because they are not the same, weighted membership degree is introduced to the optimization function so that leading to less error. There are some parameters of weighted p-norm LS-SVM, genetic algorithm is introduced to obtain the optimal parameters. Case study shows that adaptive weighted p-norm LS-SVM is better than other SVM and good result is obtained.
Application of Marginal Spectrum in Active Lamb Wave Damage Monitoring of Plate Structure
Authors: Xu Bao Chun , Wang Mu Lan , Jia Qian
Published: January 2014

In this study, the marginal spectrum based on instantaneous parameter is applied to the active Lamb wave-based health monitoring of plate structure to investigate the marginal spectrum variation of the signals after being added with damage scattering signal. First,the active Lamb wave monitoring technology is employed to obtain the Lamb wave signals of the plate before and after damage. Then the marginal spectra of the signals before and after damage are obtained using the HHT technology and compared with the spectrum of the signals. The results show that the marginal spectrum can better describe the variation of the signals before and after damage.
Identification of Physical Parameters in a Robotized IPC Device Interacting with Human
Authors: Ferraresi Carlo , Hajimirzaalian Hamidreza , Maffiodo Daniela
Published: January 2014

Intermittent Pneumatic Compression devices are widely used for various therapies concerning the cardio-circulatory or lymphatic system, and also for performance recovery in sports activity. The development and setup of such devices are mainly based on empirical procedures, while few researches adopt an engineering approach based on mathematical modeling and identification. In this approach, the most critical point is the definition of parameters concerning the human-machine interaction. This paper proposes an original and simple method to identify such parameters, which allows to describe in effective way the main dynamic characteristics, fundamental for a correct design and control of the device.
Modbus/TCP Communication Anomaly Detection Based on PSO-SVM
Authors: Shang Wen Li , Zhang Sheng Shan , Wan Ming
Published: January 2014

Industrial firewall and intrusion detection system based on Modbus TCP protocol analysis and whitelist policy cannot effectively identify attacks on Modbus controller which exactly take advantage of the configured rules. An Industrial control systems simulation environment is established and a data preprocessing method for Modbus TCP traffic captured is designed to meet the need of anomaly detection module. Furthermore a Modbus function code sequence anomaly detection model based on SVM optimized by PSO method is designed. And the model can effectively identify abnormal Modbus TCP traffic, according to frequency of different short mode sequences in a Modbus code sequence.
Morphology and Strength of Cement Paste from Clay as Nanomaterial
Authors: Norhasri M.S. Muhd , Hamidah M.S. , Fadzil A. Mohd
Published: January 2014

Now days the application of nanomaterials was vastly growing in the development of new material to improve the quality of human life. Particles of nanomaterials which are in nanoscale helps to improve to the characteristics of the existing micro based materials. The application of nanomaterials in the construction were started since in the early 90s when during those time micro based materials was very demanding especially when dealing with High Performance Concrete (HPC). The utilization of nanobased materials improves and reinforces the cement matrix system and performs early strength and also enhances tensile properties of concrete. In this research, two types of clay were used which nanometakaolin and nanometaclay. nanometakaolin were made from sol gel process thats involved milling technique and nanometaclay were supplied by Sigma Aldrich. The mix proportion for clay based cement paste also includes metakaolin as cement replacement material. nanometakaolin and nanometaclay was added as additives from 0, 1, 3, 5, 7, 9 percent (%) from weight of cement and will be compared to OPC as control specimen. nanometakaolin and nanometaclay inclusion in cement paste will be evaluated for morphology effect by using Scanning Electron Microscope (SEM), chemical composition by using X-Ray Fluorescent (XRF) technique and strength properties. From morphology evaluation, the shape of the particles and particularisation of the matrix observed on the nanometakaolin, nanometaclay and plain cement paste were compared. Similarly, the strength of the plain cement paste shows was compared with those of nanometakaolin and nanometaclay. From the results, shows that inclusion of nanometakaolin at 7% additives generates early strength of cement paste and at 28 days of age addition of 1% of nanometakaolin was found to be the optimum addition level. The addition of 1% nanometakaolin acts as an ultra-filler and refines the microstructure of concrete. Furthermore, nanometakaolin also produces a secondary hydration product by optimizing the remaining calcium hydroxide which was not fully removed during the hydration period.
Material Removal Mechanisms in Cu Electrochemical Mechanical Polishing
Authors: Bian Yan Fei , Zhai Wei Jie
Published: January 2014

The material removal mechanisms for Cu electrochemical mechanical planarization (ECMP) including 5-Methyl-1H-Benzotriazole (TTA), hydroxyethylidenedi phosphoric acid (HEDP), and tribasic ammonium citrate (TAC) were investigated by electrochemical techniques, X-ray photoelectron spectrometer (XPS) analysis, and polishing of Cu-coated blanket wafers. The experimental results show that the main factor affecting the thickness of the oxide layer formed during ECMP process is the applied potential. This understanding is beneficial for optimization of ECMP processes.
Numerical Control Machining of Scroll with Variable Thickness
Authors: Liu Tao , Wang Xia Qin , Wu Jun , Wang Yong Wei
Published: January 2014

With the development of scroll technology, the requirements of more efficient and more accurate processing method for scroll compressor parts become more urgent. This paper proposes a method to improve the machining effect of scroll compressor. The approach is based on 3-point arc approximation method which divides combined profile of scroll wrap into subparagraph arcs that can be interpolated on CNC System. This approach simplifies the programming process and improves the curve fitting effect. The results indicate that the fitting error is in the predetermined range, and the interpolation points of cutter center track are significantly less than those based on CAD/CAM software. The method presented in this paper is of significance to the NC machining of novel precise scroll profile.
MQL Application in High-Speed Turning Bearing Steel
Authors: He Juan Juan , Pei Hong Jie , Chu Yang , Wang Shi Wei , Wang Gui Cheng
Published: January 2014

Green high-speed cutting is one of the main development directions of advanced processing technology.The defects of the traditional cooling and lubrication conditions and the deficiencies of external MQL (Minimum Quantity Lubrication) were analyzed in this paper. A new way of cooling and lubrication named internal MQL was highlighted, and an internal MQL system applied to turning was researched and designed. By high-speed turning of bearing steel GCr15 under different cooling lubrication conditions as dry turning, external and internal MQL, the comparative study of cutting force and surface roughness was carried out systematically. The results showed that the internal MQL has a comparative advantage, showing a good application prospect.
Modal Modification of Damped Asymmetric Systems without Using the Left Eigenvectors
Authors: Li Li , Hu Yu Jin , Wang Xue Lin
Published: January 2014

This study focuses on the prediction of complex eigenpairs of modified asymmetric systems. A method, which combines the reduced basis and the projection technique, is presented to predict the eigenpairs of modified asymmetric systems. The reduced basis obtained using the homotopy perturbation technique only requires the eigensolution of interest such that the modal truncation problem can be avoided. More importantly, the method can be carried out without using the left eigenvectors. The accuracy of the reduced basis approximation can be improved by introducing the projection technique. A rotor dynamic system is used to illustrate the capacity of predicting the changes of eigensolutions.
Study on the Static and Dynamic Characteristics of Linear Rolling Guideway
Authors: Zhang Yao Man , Yang Guang Xiao , Gu Ren Jun
Published: January 2014

Linear rolling guides are widely used in the NC machine tool, and usually the NC machine tool's characteristics shall been influenced by the characteristics of the guide greatly. The HSR series of liner rolling guides are taken as the research object of the paper. The methods of constructing the dynamic finite element analysis models are studied. The contact element is applied to simulate the characteristics of junction surfaces during the static characteristic analysis. The spring damping element is applied during the dynamic characteristic analysis. The static stiffness, natural frequencies, modal shapes and other characteristics are obtained by finite element analysis. Then the experiments of linear rolling guide are carried out and verified the model that had been built and calculation results of finite element analysis.
Periodic Motion Control of Flexible Manipulator via Controllable Local Degree of Freedom
Authors: Bian Yu Shu , Li Ke Ke , Shan Bo
Published: January 2014

An idea is proposed to use the controllable local degree of freedom to reduce vibration of the flexible manipulator performing the periodic task. The controllable local degree of freedom is incorporated into the flexible manipulator and used as an effective way to alleviate vibration through dynamic coupling. The feature of the periodic motion is utilized and a simple method is suggested to control vibration by constructing the appropriate modal control force via the controllable local degree of freedom, thereby counteracting the effects of the periodic exciting force. The numerical and experimental results preliminarily prove its effectiveness and feasibility in practical applications.
Testing of Hardness on Long Rail Welded Joint by Means of Magnetic Barkhausen Noise Technique
Authors: Yin Liang , Shu Di , Chen Juan , Qi Xin
Published: January 2014

The experiment shows that the Magnetic Barkhausen Noise (MBN) signal strongly depends on the elastic deformation, heat treatment state of surface and microstructure of the material, etc. Using the MBN technology that rely on the material characteristics, MBN can be used for testing the surface hardness of 60kg/m U74 seamless rail made by China Harbin welded rail plant. And the testing result obtained by the MBN method is consistent with the results obtained by the Brinell hardness (HB) method. Consequently, this non-destructive testing technique will have a strong life and an extensive market.
Study of Proportional Navigation Guidance of Reentry Vehicle Considering Wind Disturbance
Authors: Zhang Li Jia , Huang Yi Xin , Zhang Yu , Li Zhao Ying
Published: January 2014

Proportional navigation guidance law is widely applied in the terminal guidance of the reentry vehicle. However, the guidance accuracy of the traditional PNG law is largely affected by the wind disturbance. To improve the impact precision, the proposed method applies a feedback of angular velocity deviation to the traditional PNG law. With the proposed method, the vehicle could satisfy the terminal constraints under large wind disturbance. Also, simulation results validate that the proposed method can well enhance the performance of the vehicle.
Based on 1/4 Vehicle Suspension System for Tire Pressure and Tire Stiffness Nonlinear Studies
Authors: Wang Hao Jun , Xu Wu Bin , Li Bing , Hao Kai Ming , Jiang Chao
Published: January 2014

Based on a 1/4 vehicle suspension testing laboratory platform for testing, analysis and study the relationship of parameters between car tire pressure ,stiffness and sprung mass. Use Matlab for data processing and numerical analysis. Establish tire pressure and tire stiffness nonlinear relationship. For the subsequent dynamic tires test and combination suspension System research to provide theoretical reference and practical basis.
Simulation on Performance of Sequential Turbocharging Diesel Engine with Inlet and Exhaust Bypass System
Authors: Cui Xin Jie , Zhang Shi Dong , Shi Fan , Yang Chuan Lei
Published: January 2014

Sequential turbocharging and inlet/exhaust bypass (STC-CAB) were composited to used on diesel engine, which can expand engine running area in part load and optimize the matching of turbocharger and diesel engine. The simulation was studied based on GT-POWER software in order to investigate the engine performance difference caused by stc-cab system. The simulation results showed that STC-CAB system can make the compressor away from surge area and expand diesel engine running area, improve the performance of torque in low load.
Dynamic Detection of the Multiple Hydrate Blockages in Natural Gas Pipeline Using Mass Pulse at the Inlet
Authors: Tian Yuan , Zhao Xue Fen , Tian Dan , Wu Rui , Tang Huan
Published: January 2014

Due to the influence of low temperature, high speed and agitation in the pipeline, gas hydrate can be easily formed and blocks the pipeline. If the non-complete blockage pipeline segments are accurately detected with the number, location, length and magnitude of the blocked segments identified, the proper pigging operation scheme can be made to reduce the risk of complete blockage in the pipeline. The authors put forward that by using mass pulse launched at the pipeline inlet, the characteristic data of pipeline blockages can be identified through its propagation characteristics in multiple non-completely blocked natural gas pipeline segments. In this paper, the mathematical model of gas transient flow in a pipeline with multiple blockages is established, and pulse propagation in the blocked pipeline is simulated by using time splitting algorithms and TVD / Godunov mixed format. Under the conditions of maintaining the valve open at the end of the pipeline, the history curve of pressure fluctuation at the pipeline inlet is analyzed to dynamically identify the number of segments blocked in natural gas pipeline, blockage positions, blockage length, and blocking magnitude of multiple blockages.
Graph Based Property Representation for the Function Decomposition
Authors: Hou Yue Min , Hei Guang Jun , Wang Xue Yan , Cao Yi Fan , Zhao Zhen
Published: January 2014

A graph based property representation enables partly automation of the function decomposition. The first step in design is to decompose the main function into subfunctions. To partly automate this process, a key issue is to establish a computational decomposition process. This paper transforms functions into properties of substructures and their relationships, and uses weighted graphs to represent properties. The graph represented property is then induced into a group of properties by induction mechanisms. This process is conducted automatically. The contribution of this paper is a method to automate the design function decomposition.
Application Research of Integrated Design Using Neural Networks
Authors: Cao Jian , Yan Cong , Wang Xiao Nan
Published: January 2014

This paper surveys the status of nonlinear, and adaptive flight control, and summarizes the research being conducted in this area. A description of the controller architecture and associated stability analysis is given, followed by a more in-depth look at its application to a tiltrotor aircraft. This is followed by a summary of future research directions, and possibilities for technology transition that are currently underway.
Reliability Optimization Design of Mechanical Parts Involving Confidence Level of Reliability
Authors: Liao Ying Hua , Zhang Liang Dong , Wang Chun
Published: January 2014

Based on the central-limit theorem and the stress-strength interference theory, a mathematical model is presented to predict confidence level and confidence interval of reliability. The equations of the lower and upper limit of unilateral confidence interval of reliability, and the limit of bilateral confidence interval of reliability are obtained. And then by an example about a rotor spindle of aviation alternator, a method of reliability optimization design involving confidence level of reliability is proposed. The study result has certain theoretical meaning and engineering value for reliability optimization design of mechanical parts.
An Inspection Period Analysis of the Grinder Rods Eccentric Wear of the Rod-Pumped well Based on the Multi-Linear Regression Equation
Authors: Shan Chang Ji , Luo Jun , Li Lin
Published: January 2014

This paper aims at establishing the empirical equations of the qualitative relationship between the inspection periods of the grinder rods eccentric wear of the rod-pumped well and its influencing factors and putting a hypothetical test of it to find out the scientific evidences for the solutions to the eccentric wear wells on the basis of multi-linear regression equation.
The Springback Predication for a Pillar Reinforcement Plate with Drawing Surface Optimization
Authors: Zhang Xiao Wu , Men Chang Feng
Published: January 2014

More and more high strength steel panels are used in the Auto assembly for the reason of reducing pollution emissions and fuel consumption. The springback predication with different drawing styles for A pillar reinforcement plate is studied in this paper. The drawing process is optimized with different height drawbead for getting a reasonable forming result without obvious crack areas. An open drawing is used to study the possibility of reducing the blank size, but the measuring results show that the springback value predicted with close ends drawing is very close to the real tryout results and more lower than open ends drawing. So the open end drawing method can not be used in the tryout from the perspective of reducing the springback value.
A Rigidity and Flexibility Coupled Reliability Calculation Method for the Type 6-6 Stewart Parallel Mechanism
Authors: Li Chang , Ma Xiao Gang , Han Xing
Published: January 2014

Type 6-6 Stewart Parallel Mechanisms have been used widely in industries nowadays. Because of the influence of inevitable flexible deformations of each structural part, the loss of mechanism motion accuracies are obvious. It reported an effective rigidity and flexibility coupled reliability calculation method for this kind of mechanism. Firstly, it built a parameterized 3-D virtual model of this mechanism in ADAMS, and then used user defined function (a function in VC++ software) to simulate the stochastic error distributions; through this method, a Monte Carlo parametric model was built, and this was a basis for subsequent reliability calculation. Secondly, it programmed a reliability calculation system for this mechanism and performed multiple dynamic simulations to obtain the mechanism reliability data. This method took the influence of key parts flexible deformation on mechanism motion accuracy into account, and included simplicity (no need to solve complex mathematic model) and high accuracy which make it highly promising for application in mechanism design.