bluuebunny/crossref_metadata_2025 huggingface dataset:
A Review on ICTs, E-Learning and Artificial Intelligence for Dyslexicâ??s Assistance
Authors: Drigas Athanasios , Dourou Athanassia
Published: August 2013

This paper is a review on the exploitation of the Information and Communication Technologies (ICTs) on the diagnosis, intervention and assistance of learning disabilities and especially on dyslexia. Here are presented several studies that include computerized techniques or developed applications for adults and children with dyslexia. Special focus is given on individualized approaches in the areas of diagnosis and intervention. New technologies on general or special areas, such as fuzzy systems, artificial intelligence etc. offer direct observation, measurement and qualification of the subject so they are incorporated on designed software for diagnosis, screening or intervention. Here are presented, studies on learning disabilities (dyslexia in particular) that have been realized so far by researchers who have done global research in the educational community. These studies seem promising through technological progress on the areas of psychological assessment, diagnosis and intervention.
Study on the Mechanism of Engineering Ceramics in Rotary Ultrasonic-Vibration Grinding
Authors: Yu Chang Chun
Published: August 2013

This paper analysis the process of Al2O3 engineering ceramics grinding and study the mechanism of rotary ultrasonic-vibration grinding. Then setting the model of the material removal rate and grinding force, which is based on Creasing fracture mechanics. Results indicate rotary ultrasonic-vibration grinding can apparently improve the material removal rate and cut down the grinding force.
Thermal Analysis of Hydration Heat in Mass Concrete with Different Cement Binder Proportions
Authors: Lee Mi Hwa , Khil Bae Su , Yun Hyun Do
Published: August 2013

This study is conducted to evaluate analytically the effect of cement binder proportions (ordinary Portland cement, blast-furnace slag and fly ash) on the hydration heat of mass concrete with specific compressive strength of 30 MPa. Two types of blended concretes were mixed; binder of PSLB_352 consists of ordinary Portland cement (OPC) : blast-furnace slag (BFS) : fly ash (FA) = 3 : 5 : 2 and binder of PSLB_442 comprise OPC : BSF : FA = 4 : 4 : 2. For comparison, a control concrete mixture was mixed with commercial low-heat cement. To measure temperature characteristics due to hydration heat of each mixture, large concrete blocks were cast and temperature within concrete blocks was measured until the equilibrium temperature was reached. Finite element model was developed for predicting hydration heat of mass concrete based on thermal characteristics of mass concrete derived from large concrete blocks. The effect of cement binder proportions on the hydration heat of mat foundation was evaluated by developed finite element model.
Quantitative Estimates of Repeatedly Quenched High Carbon Bearing Steel
Authors: Nakane Kazuaki , Mizobe Koshiro , Santos Edson Costa , Kida Katsuyuki
Published: August 2013

Martensitic high-carbon high-strength SAE 52100 bearing steel is one of the main alloys used for rolling contact applications where high wear resistance is required. Refining the prior austenite grain size through repeated heating is a process commonly used to enhance the materials strength. In this work, the microstructure of repeatedly quenched Ti, N-rich ultra-clean SAE 52100 steel was investigated. The material was melted by an electric furnace and formed by continuous casting and forging, and the crack origin on the fracture surface was investigated. It was found repeated furnace quenching effectively refined the martenstic structure. In order to further understand the structure refinement we need to develop a new quantitative evaluation method. In this paper, the homology method is applied. We can estimate the situation of refinement quantitatively.
Analysis of the Effect the Modal-Parameter on the Milling Stability
Authors: Tsai Ming Chang , Hsiao Te Ching , Huang Shyh Chour
Published: August 2013

In the past few years, it has become a tendency to develop machinery of high speeds and high precision. In order to meet the need for high-speed manufacturing of high precision components, the machine tools structure must be very stiff and have high cutting stability levels. Should the process of the firsthand milling be unstable, the effects include cutting tool breakages, decrease in surface accuracy and could even shorten the machine tolls lifespan. Thus, in the manufacturing of milling, chattering often causes problems for the manufacturer. To prevent cases of milling chattering, there is a need to use a chatter stability lobe to predict the chatter stability and to analyze the effect the modal-parameter has on the stability of milling. This research paper uses the Zero-Order Analytical Method (ZOA) to analyze and compare the effects modal-parameter (natural frequency, damping ratio, modal stiffness) has on the stability of the milling system. The results show that level of stiffness and the damping ratio influences the vertical shape of the chatter stability lobes while the natural frequency affects the lateral shape of the lobes.
Modeling of Helical Gear Power Tri-Branching Transmission Based on Loaded Tooth Contact Analysis
Authors: Yang Xiao Fang , Fang Zong De , Zhang Yong Zhen , Han Yuan Fei
Published: August 2013

According to the principle of tri-branching, a mechanism structural model was developed to analyze the helical gear transmission system. On the base of loaded tooth contact analysis (LTCA), the load transmission error of each gear stage is simulated at the any engagement position, and the fitting curves of the torsion mesh stiffness are obtained, which can improve the numerical precision. The research results can be applied to analyze the actual application of tri-branching transmission system and provide a firm foundation for study the power-split and load-sharing characteristics.
Crystal Quality Improvement of CuInS2 Thin Film by Two Step Fabrication Method with Bismuth Addition
Authors: Fukamizu Shohei , Hironiwa Daisuke , Minemoto Takashi
Published: August 2013

CuInS2 (CIS) is the promising candidate of an absorber layer of high efficiency thin film solar cells. The crystal quality of CIS is one of the important factors for high efficiency. A chemical doping approach using antimony and bismuth (Bi) is well known for improving crystal quality in Cu (In,Ga)Se2 thin films. In this study, the effect of Bi doping on evaporated CIS thin films was investigated. A CIS thin film without Bi doping annealed at 600°C showed small crystal grain size of ~1 μm, which was smaller than the CIS film thickness of 2 μm. The small addition of 50 nm-thick Bi promoted crystal growth and large grain size of greater than 1 μm, which was comparable to the CIS film thickness, was realized. The CIS films without and with Bi addition had surface precipitates identified as Cu-S and Cu-Bi-S compounds, respectively. The crystal growth promotion by Bi addition can be attributed to that the Cu-Bi-S compound which has lower melting point of 470~490°C than that of the Cu-S compound of 507°C acted as flux for crystal growth.
Minimization of Open Circuit Voltage Fluctuation of Quantum Dot Based Solar Cell Using InN
Authors: Rosli Farah Ayuni , Rashid M.A. , Malek F. , Othman M. , Zaidi A.A. , Humayun M.A.
Published: August 2013

This paper reports the improvement of open circuit voltage stability of solar cell using InN based quantum dot in the active layer of the device structure. We have analyzed theoretically the temperature dependence of the open circuit voltage of the solar cell to investigate its fluctuation using Ge and InN based quantum dot in the active layer of the solar cell. Numerical results obtained are compared. The comparison results reveal that the open circuit voltage has been reduced a little bit but the fluctuation of terminal voltage has been reduced significantly by using InN quantum dot in the active layer of the device structure. Therefore InN is proved to be an excellent material to fabricate solar cell to provide higher stability in the open circuit voltage of the solar cell in very near future.
FEM-Based Simulation and Gripper Jaw Trajectory Fitting of Stretch-Bending Process for a Bending Beam of Railway Vehicles
Authors: Wang Sheng Man , Yang Xin Hua , Lu Xing
Published: August 2013

The bending beam of railway vehicle is made of thin stainless steel, with large sizes and unsymmetrical section, and prone to defects during stretch-bending forming process, such as wrinkling, cross-section distortion and so on. A reasonable trajectory of gripper jaws could make for mitigating the mentioned defects. The Finite Element Method was employed to fit the trajectory as well as simulate the forming process. The FE model was built by using the commercial FE software Hypermesh and ABAQUS/CAE. The analysis was carried out based on dynamic explicit and displacement control method. On this basis, the actual stretch bending process was developed according to the fitted trajectory and simulated process. The actual production process indicates that the formed beam can meet the design requirements, and the method is feasible and economical, as well as can contribute to a better understanding of stretch bending process and die design.
Research of Quantitative Analyzer for Fluorescence Immune Chromatography Strips
Authors: Li Xiao Ting , Jiang Kai , Wang Ping
Published: August 2013

Fluorescence immunoassay technology is widely recognized as the most sensitive detection technology, now widely used in clinical testing. The research of quantitative analyzer for fluorescence immune chromatography strips is of great significance. In this thesis, a quantitative analyzer for fluorescence immune chromatography strips has realized, based on photoelectric detection principle and immunochromatographic. The system uses LPC1788 and MSP430 as processors. Using some algorithms such as low-pass filtering, least square method and area method to analyze the detected waveform and eliminate noise with high accuracy. In our experiment, the minimum detection concentration is at several mIU/ml levels, the relative standard deviation is less than 2% and it has good linear response characteristics in a concentration range from 0.5125 to 952mIU/ml while the correlation coefficient R2 is 0.981. The instrument has a good prospect.
Research on Ontology Knowledge Based System of Meteorological and Hydrological Support
Authors: Li Wan , Zhou Bi Hua , Zhang Qi , Fu Ya Peng , Wang Tao
Published: August 2013

According to knowledge sharing&reusing problem and system extensibility&portability problem in meteorological and hydrological support, the knowledge concepts, attributes, instances, hierarchy and relationships were clarified; the ontological knowledge base was established by OWL ontology language and SWRL rule language. With the help of Racer, Protégé, Jess, and class positioning algorithm, class testing algorithm, rule testing algorithm, the meteorological and hydrological support prototype system was implemented by Eclipse, ProtegeInEclipse plug-in and Jena. The system includes the server, the client and the processing controller. It provides artificial intelligence techniques means for knowledge maintenance and usage in meteorological and hydrological field.
Optimization Algorithm Analysis for FIR Filter by FPGA
Authors: Shen Zhao Jun , Xu Sen
Published: August 2013

The article introduces essential method to realize the high accuracy and velocity FIR filter by FPGA. Proposes the FIR filter optimization scheme design of serial shifts based on FPGA. Avoided the shortcoming of the traditional parallel algorithm module taking the massive hardware resources . And give 11-order and 8-bits low pass filter design as the specific research object. Realized the partial functions which the traditional numeral FIR filter cannot.May adjusts the filter exponent number conveniently and suits different application.
Research on the Key Technology of Road Machinery Intelligent Compaction
Authors: Xia Jing Jing
Published: August 2013

The degree of compaction is a measure of the main evaluation index of road machinery compaction quality, but also affects the working characteristics of vibratory roller. In order to make the vibratory compaction always be in the best working state, we must adjust the operating parameters of the roller based on the real-time compaction pressure degree of the compacted material,for the best compaction effect. The paper analyzes the vibration frequency, amplitude, speed and other main working parameters and the relationship between degree of compaction,discusses how to select the main parameters, and carries out the research of Road Machinery Intelligent compaction system.
An Adaptive Approximate Model Neural Network Controller for EAF Electrode Regulator System
Authors: Zhao Hong Ge
Published: August 2013

This paper proposes a robust adaptive neural network controller (RANNC) for electrode regulator system. An equivalent model in affine-like is derived for electrode regulator system. Then, the nonlinear control law is derived directly based on the affine-like equivalent model identified with neural networks, which avoids complex control development and intensive computation. Pretraining is not required and the weights of the neural networks used in adaptive control are directly updated online based on the input-output measurement. The proposed nonlinear controller is verified by computer simulations.
Analysis on China's Coal Transportation Network Complexity
Authors: Qiao Jin Suo , Wang Xi Fu , Shen Xi Sheng , Zheng Chao
Published: August 2013

Based on the basic theory of complex networks, this paper introduces the basic concept and constitution of coal transport network, summarizs the characteristics of the coal transportation network.Then through principles of coal transportation network topology abstraction,we establishe the model of coal network topology, and analyses the internal and external complexity factors on coal transportation network.
The Construction of Military Documents Electronic Lexicon
Authors: Guo Zhong Wei , Jiang Peng , Zhang Jian Li , Zhang Xiao Song , Ji Li Jian
Published: August 2013

Based on the classification system of modern Chinese words classification system and characteristics of military documents field, the military document words are classified and descripted with morphology, syntax, complex feature, semantic and reference. And a military documents electronic lexicon prototype is designed. This lexicon can meet the requirement of military document intelligent processing well proved by application of military documents electronic lexicon.
Design and Development of Refueling Machine Operation Simulation System in Nuclear Power Plant
Authors: Xu Jin Jin , Wen Zhong , Zhang Kai Feng , Guan Zheng Gang , Ye Chen
Published: August 2013

In order to improve the effect of refueling training in nuclear power plant, the simulation system of refueling machine was designed and developed, combining the virtual reality technology with a real control console. The 3D virtual refueling environment of nuclear power plant was established by 3D modeling. Signals from touch screen and console are gathered by PLC and transmitted to PC graphics workstation, control the motion of virtual refueling machine, which realize the refueling operation simulation. The operation in failure modes was also realized in the system through the programming of failure database. The results show that the system runs normally and can simulate refueling operation in normal and abnormal modes, the training of refueling personnel is implemented effectively.
Semantic Web Ontology Integration Based on Formal Concept Analysis
Authors: Xia Hong
Published: August 2013

Matchmaking is the basis of doing service discovery and composition. Using ontology semantically express the service of capabilities, correctly match service. Domain ontology and Formal Concept Analysis aim at modeling concept. The role of FCA in ontology engineering is supporting reusing independently developed domain ontology. Evaluating concept similarity identifies the different concepts that are semantically close. In this paper, using concept and attribute of web services to construct the ontology. Also, an ontology based method for assessing similarity between FCA concepts is proposed.
Coal Mine Equipment Lease Management Information System Based on Workflow
Authors: Zhao Si Hai , Hu Yu Wei , Zhao Zhe Qian , Guo Yan Chen , Guo Ge , Gao Ji Ye , Zhong Peng Chao
Published: August 2013

In accordance with the characteristics of coal-mine equipment lease management, an information system of equipment lease management is put forward based on the business process management (BPM) and B/S pattern. And on the basis of investigation to a lease management enterprise of a mining aggregation, the paper elaborates the design of the software function module and structure, and the realization of technology.
The Electronic Flight Bag Based on Mobile Terminal
Authors: Xia Gui Shu , Lu Jing , He Yuan Qing
Published: August 2013

The electronic flight bag in China with few products owning Chinese independent intellectual property is attracting increasing attention in the field of the civil aviation industry in recent years. This paper introduced a level 1 EFB(Electronic Flight Bag) for general aviation with iOS as research platform. In order to realize interactive electronic checklists and automatic generation of electronic flight log, C/S model is adopted to store, update and display cabin documents, such as aeronautical charts, flight manual. Experiments show that electronic flight bag based on mobile terminal can provide the user with a good experience, which greatly reduces the pilots cabin burden and is closer to the users requirements. Moreover, the system provides an efficient way to improve safety of flight safety. Therefore, the electronic flight bag has good market prospect and practical promotional value.
Cloth Simulation with a Modified Implicit Method Based on a Simplified Mass-Spring Model
Authors: Hu Jing , Huang Wen Qing , Yu Ke Qiang , Huang Mu , Li Jun Bai
Published: August 2013

Firstly, we introduced the development of cloth simulation in recent years. Based on physical model of cloth simulation, we established the simulation system with a simplified mass-spring model. The computational efficiency is increased with this model. A modified implicit method was proposed in this paper. This method produces plausible animation, and it is easy to be realized with a stable and good real-time performance. The paper adopted AABB (Axis-Aligned Bounding Boxes) bounding volume approach for the detection of cloth collision, it obtains an excellent real-time effect of cloth simulation.
Application Analysis of Functional Ceramics Materials
Authors: Yan Tao Ping
Published: August 2013

A wide range of functional ceramics, a wide range of uses. It is the electronic information, integrated circuits, mobile communications, energy.An important foundation of modern high-tech fields of technology and national defense and other materials.This paper analyzes the different functions of the Nano, foam, smart, and biological status and application of new ceramic materials.And functional ceramics application of the main obstacles from the two aspects of price and reliability. Elaborated with the modern development of new technologies, functional ceramics and their applications are toward the high reliability, miniaturization, film, fine, multi-functional, intelligent, integrated, high performance, high functionality and composite structure direction.
Influence of Machined Workpiece Surface Integrity on Fatigue Performance
Authors: Gao Shun Xi , Zhang Qing Liang
Published: August 2013

The effect of machined workpiece surface topography and surface integrity were studied. Modifications of surface layers after mechanical surface treatments were also reviewed. Conflict ideas exist in publications about which parameters can better define fatigue endurance. The traditional one was Arithmetic Average Roughness, although deepest surface feature and the square root of the defect area were proposed. The combinations of these factors including high temperature, metallurgical alternations and plastic deformations, rather than the residual stress alone affect surface topography and surface integrity. They should be examined carefully in order to gain a better understanding of fatigue.
A Efficient Method to Map Large Scale Topographic Maps with Vehicle-Borne Lidar System
Authors: Han You Mei , Yang Bo Gang
Published: August 2013

Recent years, the vehicle-borne LIDAR technology has a rapid development, and its application in surveying and mapping is becoming a hot research topic. The main objective of this investigation is to explore the potential of vehicle-borne LIDAR technology to be used to fast mapping large scale topographic maps based on new Chinese vehicle-borne LIDAR system. It studied how to use the new Chinese vehicle-borne LIDAR system measurement technology to map large scale topographic maps. After the field data capture, it can be mapped in the office based on the LIDAR data (point cloud) by special software which programmed by ourselves. In addition, the detailed process and accuracy analysis were proposed by an actual case. The result revealed this new technology provides a new fast method to map large scale topographic maps, which is high efficient and accuracy compared to the traditional methods.
Layout Planning and Construction Mode of Electric Automobile Charging Station Research
Authors: Si Chuan Sheng
Published: August 2013

Electric automobile charging station is an important supporting infrastructure for the development of electric automobile.This article analyzes the electric automobile charging requirements.It puts forward the requirements for charging technology.It also analyzes several factors which affects car charging plannings.Last but not least ,this article puts forward some proposals on layout planning and construction mode.
Study of Stope Structure Model and Parameters
Authors: Li Jia Zhuo , Li Chuan Ming , Ma Hai Feng , Shi Wen Bao , Niu Xin Gang
Published: August 2013

Based on theoretical analysis and computational mechanics, the spatial structure of overburden rock model of 1704 working face in a coal mine, stratum quality membership of uniaxial compressive strength, layer thickness, joint cracks were analyzed. Stope model was established, immediate roof caving step distance is calculated, fracturing length and structural composition of rock beam were calculated, which may have important implications for The failure mechanism of instability of coal rock.
New Fuzzy Multi-Level Comprehensive Methodology for Safety Risk of Subway Operation
Authors: Li Jia Yang , Liu Kai Ning , Gu Ying Qiu
Published: August 2013

Subway has already become an important tool of public transportation. Subway security operation is to achieve a serious guarantee of safety and convenience. In this article, subway safety operation evaluation index system is constructed. Based on hierarchy process, triangular fuzzy number was used to describe the evaluation value obtained by experts. In order to be more objective and more precise, the correlation coefficient and standard deviation integrated approach will be used to calculate the weights of criteria in the fuzzy hierarchy process.
A Thematic Curriculum Analysis System for early Childhood Education: Initial Evaluation
Authors: Cheng Ching Ching , Huang Kuo Hung
Published: August 2013

Contrary to the elementary school and high school, the curriculum of the kindergarten is more flexible and dynamic. In recent years, the integrated curriculum approach and the thematic curriculum approach based on constructivism have being gaining more attention in Taiwan. The thematic curriculum emphasizes that the inter-disciplined and student-centered learning activities is designed based on children's interests, not solely determined by the teachers. Therefore, teachers have to monitor the curriculum development and children's learning status simultaneously. Under these conditions, a system of curriculum analysis is a necessary aid to those teachers. The purposes of this study are: First, design and implement a thematic curriculum analysis system for early childhood education, which provides feedback for curriculum supervisor. Second, evaluate the impacts of this system on the teachers abilities in curriculum design. According to needs assessment of 15 kindergarten teachers and curriculum supervisors, the researchers constructed the curriculum analysis system which provides goals, concept, initiator, activity style, time, skill, attitude, content, and teachers reflective thinking as the analysis units. The system evaluated by the 15 teachers and curriculum supervisor. The reports showed the system improved the quality of thematic curriculum in kindergartens.
Research of Evaluation Index System Model Based on the Multi-Strategy
Authors: Zhang Ya Mei
Published: August 2013

The paper analyzes mechanism of scientific research project reporting and implementation process quality assessment, constructing multi-strategy evaluation architecture model based on the N-level fuzzy idea. The model highlights the characteristics including the effectiveness, specificity, sensitivity and comparability in scientific research project quality evaluation. And the model uses of vector combination method and DEMATEL method to optimize the weights of evaluation factors in evaluation system and designs reasonable scientific evaluation system.
Study on the Engineering Management Information System
Authors: Huang Wen
Published: August 2013

There is advanced construction technology and successful experience in engineering in the field of Chinese construction, but no project management information technology. Based on the full life-cycle theory, this paper has systematically expounded the core content of project management: management, service and innovation. Project management information system has been discussed, and related research trends summarized as follows: from study on the construction phase to study on the full life cycle project management information. It aims to provide a reference for China's construction industry project management information technology in order to improve the level of project management in China.
Understanding of Demand Response in China and Automated Implementation
Authors: Song Jie , Wang Ting , Yang Yong Biao , Jieyan Xu , Chen Lu , Huang Kun
Published: August 2013

Demand response has great significance to the optimal adjustment of the electricity load curve, and also reduces difference between grid peak and valley load. But the promotion and implementation of demand response in China faces many aspects of problems such as electricity price control, power grid electricity sales profit mechanism and so on. Based on interpreting the classic electricity demand response theory, we consider the actual situation of China's electric power system and take a balance consideration of the interests of the government, power generation, power grid companies and electricity users, to give a new interpretation of the concept of demand response, which enriches technology means and economic means of demand response. Besides the leading role and main roles of implementation, we introduce the role of the initiator, and put forward the implementation of demand response project design and automated implementation system. This paper belongs to the national science and technology support programwith the power grid low carbonization characteristics of the smart grid integration technology research and demonstration in Jiangxi Provinceand SGCC projectWith the power grid low carbonization characteristics of the smart grid integration technology research and demonstration.
Gait Planning of Quadruped Robot Walking on a Slope Based on Static Balance
Authors: Zhang Wen Yu , Zhang Lei
Published: August 2013

Gait planning affects stability, motion speed, and joint torque of quadruped robot etc. Also, it is necessary to consider movement parameters of slope walking environment such as the inclination angle, the movement area of feet and so on. The stability criterion on the basis of center of pressure is chosen to analyze the stability during the movement. Based on static balance, the omni-directional walking of quadruped robot on a slope is planned. CFP is set in order to reduce the transition steps. Then the start and end positions of swinging leg and supporting leg is calculated. The process of gait transition is planned to make sure stable and continuous movement. The experiment verifies the validity of the proposed method.
Actuator Task Assignment Based on Auction Method in Wireless Sensor and Actuator Networks
Authors: Deng Ping , Zhang Ke Li
Published: August 2013

A typical Wireless Sensor Network (WSN) only performs the action of sensing the environment, the needs of smart interaction with the environment have led to the emergence of Wireless Sensor and Actuator Network (WSAN). With the presence of actuators, WSAN is heterogeneous, which brings about new challenges that need to be addressed. In this paper, the task assignment of actuators in overlapping area is studied. Firstly, a new utility function is defined, which is the standard to choose the proper action actuators in overlapping area. Then, based on the new utility function, a distributed solution called localized auction method to solve task assignment problem in overlapping area is proposed. Simulation results demonstrate that the proposed auction method can assign tasks to the unique actuator and meet the action completion bound.
Modeling of Electromagnetic Force/Torque for Magnetically Levitated Planar Motor
Authors: Zhang Sheng Guo , Dang Xiao Ping , Wang Kai
Published: August 2013

This paper models the electromagnetic force/torque of a long-stroke magnetically levitated planar motor. Based on the Lorenz force volume integral law and the force/torque superposition principle of rigid body, the electromagnetic force/torque is modeled. Experimenting results indicate the model is consistent with the measured results in sine distribution and sine period, and the errors between the model values and the measured values originate mainly from the measurement system. So this model represents analytically the electromagnetic forces and torques of the planar motor and it can be used to commutate and control the planar motor.
A Energy-Aware QoS Routing Protocol for Wireless Sensor Networks
Authors: Gao Long , Li La Yuan
Published: August 2013

As the different QoS requirements of different businesses in wireless sensor networks, we proposed a QoS routing algorithm-EAQoS. The algorithm built multiple paths to sink node by recording the minimum hops of neighbors to sink. Then data was sent by the path that satisfied its QoS requirements and had enough residual energy. According to the comparisons with the SAR routing algorithm, this algorithm has obvious advantages in providing different services and prolonging the lifetime of network.
Health Prognostic Method Based on the Time Series Analysis for Actuators
Authors: Zhang Jing Kai , Wang Juan , Liu Xiao Xiong , Zhang Wei Guo
Published: August 2013

The purpose of health prognostic is to predict the future health status of system and determine the time from the current health state to functional failure completely. Application data time series analysis method often can get the expected prediction effect. Taking into account the failure characteristics of the actuators in flight control system, the autoregressive moving average model is introduced to health prognostic. The prognostic model is established. The simulation results show the effectiveness of the algorithm.
Temperature Self-Compensation of Micromechanical Silicon Resonant Accelerometer
Authors: Shi Ran , Zhao Jian , Qiu An Ping , Xia Guo Ming
Published: August 2013

Temperature is one of the most important factors affecting the accuracy of micromechanical silicon resonant accelerometer (SRA). In order to reduce the temperature sensitivity and improve the sensor performance, a new method of temperature self-compensation for SRA is presented in this paper. Utilizing the differential structure of SRA, the temperature compensation for bias and scale factor can be realized simultaneously in this method. Moreover, because no temperature sensor is needed in this method, the error in temperature measurement due to the temperature gradient between the mechanical sensitive structure and temperature sensor is avoided, and the precision of temperature compensation for SRA can be further improved. The test results obtained on SRA prototype which is developed by MEMS Inertial Technology Research Center show that, by employing the method of temperature self-compensation, the temperature coefficients of bias and scale factor are reduced from 3.1 mg/°C and 778 ppm/°C to 0.05 mg/°C and -9.4 ppm/°C, respectively.
Numerical Simulation of Internal Flow Field on Diesel Centrifugal Gas-Oil Separator Based on CFD
Authors: Zhao Zhi Guo , Yu Wen Ming
Published: August 2013

Aiming at the low efficiency problem of the traditional gas-oil separator, this paper put forward a centrifugal gas-oil separator. In order to identify out the interior fluid field character of centrifugal gas-oil separator, RANS equation, RNG k-ε model and discrete phase model was applied to simulate the interior fluid field character and separation efficiency of centrifugal gas-oil separator. The simulation results showed that the flow field in the disc clearance was mainly laminar flow, and the flow field at the import and export of the disc was turbulence. Meanwhile, the velocity and pressure of the interior fluid field were equably distributed, the velocity and pressure in the disc clearance fluctuate in a tight range along vertical direction, and decrease along horizontal direction, and the particles in the disc clearance were distributed uniformly. The separation efficiency was 96.6% and the results met the design requirements.
DWT Blind Detection Algorithm of Digital Watermarking on still Image Based on KFDA
Authors: Long Hao , Huo Na , Yang Yong , Yu Ben Chen
Published: August 2013

The algorithm of blind detection on DWT (Discrete Wavelet Transform) digital watermarking of still image is proposed to overcome the lower detection rate and higher false alarm rate problem. The algorithm utilizes KFDA (Kernel Fisher Discrimination Analysis) theory. With the help of research results of blind detection on DCT digital watermarking, the algorithm passes the test information by stochastic resonance system so as to amplify weak signals. Then the algorithm chooses suitable sample vector by computation. KFDA theory, a kind of learning machine with high precision is used to realize blind detection. Both theoretical analysis and simulation results show that the algorithm improves detection probability at low embedding strength. At the same time the algorithm also decreases false alarm rate.
The Application of the Image Edge Detection in Analysis of Composite Insulators Hydrophobicity
Authors: Li Yan Qing , Jia Zi Hang
Published: August 2013

Image edge detection technology which is applied to the hydrophobic grade discrimination of composite insulator is of great significance. How to accurately detect the edge of the water droplets is very important in the process of automatic identification of composite insulator hydrophobicity. This paper detects composite insulator hydrophobic image edge with image edge detection technology. Firstly, adaptive histogram equalization technique is used to enhance image, reducing the similarity of target and background which is caused by the transparency of water. Then the paper uses the improved Canny algorithm which is introduced Ostu threshold method to detect the image edge. The experimental results show that the improved algorithm can accurately acquire the water droplets edge of composite insulator surface, which can lay a foundation for automatic discrimination of composite insulator hydrophobic grade.
Fast Intra Mode Decision Algorithm Based on Mode Correlation in SVC
Authors: Jing Luna , Li Ning , Ma Li Ni
Published: August 2013

Intra4×4 mode decision has correlation between enhancement layer and base layer in scalable video coding (SVC). In this paper, a new intra mode decision algorithm is proposed based on this correlation and the proximity of prediction directions of nine Intra4×4 prediction modes. This method is used in enhancement layer to decrease the mode numbers in enhancement layer. Experiments show that the proposed algorithm can save 27.52% encoding time on average with negligible PSNR change and small bit-rate loss.
Multi-Hypothesis Temporal Error Concealment Scheme Based on Kalman Filter
Authors: Zhan Xue  Feng
Published: August 2013

In this paper, we present a multi-hypothesis scheme of Temporal Error Concealment (TEC). The lost block is concealed by several hypothesis blocks in the previous frame, and the corresponding Motion Vectors (MVs) of hypothesis blocks are derived using a kalman filter based on the similarity of local MVs. The processing is at the level of 8x8 block and the tendency in horizontal and vertical orientations is considered to predict the candidate MVs. Experimental results demonstrate that the proposed method can provide better performance as compared with the conventional approaches.
A Method for Signal Denoising in FMCW Radar Lever Measurement
Authors: Ni Jian Yun , Luo Jing , Shan Chuan Bin
Published: August 2013

A novel signal denoising method using Sym3 wavelet in FMCW Radar lever measurement is proposed. The method provided the signal energy distribution display with respect to the particular time and frequency information. Firstly, the main component of echo signal is extracted by energy analysis and scale decomposition by Sym3 wavelet. Then, the disturbed component is eliminated by frequency filtering. Finally, spectral estimation method is used to estimate the relative distance of the object. The simulation results have shown that the Sym3 wavelet was found to be a better approach for denoising in FMCW Radar lever measurement. The Emulation results have shown that measuring accuracy can achieved the 20 millimeter level which can satisfy the desire requirements of the measurement system.
Application of Video Image Interpretation Technology in the Angular Distortion Measurement System
Authors: Zhang Yao Yu , Zhang Ming Hui
Published: August 2013

A new video image interpretation technology applied mainly to the angular distortion measuring system of navy vessel is developed in this paper. The video interpretation system incepts two video signals coming from two CCD of photoelectric self-collimation parallel optic equipment. Real-time video image processing and interpretation, as well as dynamic miss distance are achieved by using concurrent working mode, and the relatively distortion of vessel can be obtained by combining the two measurement results.
Measurement Method of Vehicle Shaft Revolution Speed Based on Capacitive Grating Sensor
Authors: Chen Chang Xin , Ma Tie Hua , Jin Hong , Xie Rui
Published: August 2013

Due to the narrow interior space of vehicle, the compact structure limited the method of revolution speed measurement based on photoelectric and magnetoelectric, so a new measurement method based on capacitive grating sensor is presented here. The sensor will output alternating capacitance signal by fixed the mobilizable grating on the shaft and fixed the stator grating on the bracket. The capacitance signal will turn into the corresponding sine wave signal to the speed through differential pulse width modulation circuit, subtraction circuit and low-pass filter circuit, and will output a square wave of the same frequency with the sine wave through phase locked loop circuit. Then the speed measurement will be realized by counting the signal pulse. Experiments show that this method has the characteristics of non-contact measuring and high sensitivity.
A Fast Direction Finding Algorithm Based on Correlation Processing
Authors: Guo Dong Liang , Li Zhong Hua
Published: August 2013

To reduce the computational complexity of direction finding algorithms based on correlation processing, a fast algorithm is presented in this paper. Unlike the conventional direction finding algorithms which calculates the correlation coefficients in the whole azimuth range, the improved algorithm measure the direction of arrival (DOA) roughly first, then, measure the DOA only in finite angle interval and searches the maximal correlation coefficient, thus shorten the execution time greatly. In addition, the algorithm has no influence on the accuracy of direction finding. The best proportion between samples for rough measurement and samples for fine measurement is analyzed. Computer simulation results confirm that the proposed method can shorten the computation time greatly, and the proposed algorithm has practical application value in the instantaneous direction finding.
Monitoring On-Line and Control of Sludge Concentration in Sewage Treatment System
Authors: Yin Lian Qing , Yin Chun Xiao , Zhou Xue , Liu Jia
Published: August 2013

The reuse of industrial waste and urban sewage is a vital method for solving the shortage of water resource in China. Settling tank as a processing link in water treatment system widely used exercises a great influence on sewage treatment efficiency, and sludge emissions have a great influence on the operation of water treatment plant. Manual mud and mechanical dredge are widely used in most of the water treatment plants from the current domestic. The design used ultrasonic as a method for determination of sludge concentration, developped corresponding application control software, and finally completed a reasonable and feasible for settling tank intermittent discharge of sludge monitoring and emission control system.The result of our simulation system shows that the program operation is stable and maneuverability, and this set of monitoring on-line and control system has good application and development foreground.
A Data Transfer Integrate System by Using Single Camera
Authors: Chang Shyang Lih , Wang Shih Jia , Lu Ming Chih , Tsai Cheng Pei
Published: August 2013

there is a novel data transfer integration system by using single image proposed in this paper. There are many sensors use to monitoring the landslide occurred or not, but the monitoring results have different transmit protocol such as: Wi-Fi, transmit line, 2.4 GHz and ZigBee. This system is a data transfer integration system for all sensors, and it can achieve a real time monitoring system. The system integrate many sensor signals to microprocessor, and convert analog signal to digital signal by using A/D converter, i2c and UART, and the measuring results of sensors and display on a 8*8 matrix LED board. The system use the existing landslide-monitoring camera, and the matrix LED board install in the monitoring area. The result of sensors can be transmit to monitoring center by using single image, the data will not affect by environment, weather and mountain terrains.
The Simulation Research of Harmonic and Reactive Current Detection
Authors: Wan Jun Li , Chen Wen Jie
Published: August 2013

This paper arrives at a method of harmonic and reactive current real-time detection applied on active power filter based on the three-phase circuit instantaneous reactive power theory. With Matlab simulation software, a research on simulation of harmonic detection means is carried out, and an analysis of the simulation result is presented. The result indicates: the harmonic detection means based on instantaneous reactive power theory can detect harmonic and reactive component in three-phase current precisely and real-time, to supply reliable harmonic and reactive current for harmonic restraint and reactive power compensation. It could provide reliable indicator parameters for research and development of active power filter.
Finite Element Study on the Influence of Shear Key Diameter on the Shear Performance of Composite Sandwich Panel with PU Foam Core
Authors: Mostafa A. , Shankar K.
Published: August 2013

The present study deals with the shear behavior of the composite sandwich panels comprised of Polyvinylchloride (PVC) and Polyurethane (PU) foam core sandwiched between Glass Fiber Reinforced Polymer (GFRP) skins using epoxy resin. Experiments have been carried out to characterize the mechanical response of the constituent materials under tension, compression and shear loading. In-plane shear tests for the sandwich panel reveal that the main failure mode is the delamination between the skin and the core rather than shearing the core itself since the skin-core interaction is the weakest link in such structure. The Finite Element Analysis (FEA) of the sandwich structure, based on the non-linear behavior of the foam core and skin-core cohesive interaction, shows that shear response and failure mode can be predicted with high accuracy.
The K-Exemplars Clustering Method
Authors: Kao Hsiou Hen , Huang Li Ching , Wen Miin Jye , Wu Kuo Lung
Published: August 2013

In order to apply the concepts of k-means to deal with any specified dissimilarity measures, we propose a k-exemplars clustering method that modifies k-means by restricting the cluster centers on data points. The proposed method not only has similar clustering accuracy as k-means but also faster convergence. According to the definition of the objective function of k-exemplars, the proposed method can be used to deal with a relational data set, and the cluster centers (exemplars) of each cluster will also be extracted. Hence, the k-exemplars can work in an environment with specified dissimilarity measures.
Structural Design and Analysis of the Motionlink in the Dynamic Assembled Screw-Driven Device
Authors: Feng Yi Fei , Xu Xiao Jun , Xu Hai Jun , Zhang Xiang , Zhou Fa Liang , Wang Rong
Published: August 2013

The dynamic assembled screw-driven device is a new kind of mechanical driving device, one of its main structures is the reasonable designed motionlink. To setup two groups of oriented wheels which complied the Archimedes screw around the center cylinder, the top groups of wheels ensure the helical plates moving in the right direction otherwise be twisted, and the other groups of wheels provide the power that ensure the helical plates meshed accurately and driving stably. This paper is to calculate the structure in theory and make some primary simulation analysis for the mechanical characteristic in Static.
Machining of NURBS Surfaces Using Three-Axis NC Milling Machine
Authors: Yeh Syh Shiuh , Chen Wan Chu , Sun Jin Tsu
Published: August 2013

Three-axis NC milling machines must carefully consider the surface interpolation algorithm and the cutting tool compensation method to achieve precise NURBS surface machining results. This study thus analyzed NURBS surface functions and developed a tool compensation method to efficiently compensate for the radius and length offsets of the cutting tool used for NURBS surface machining. A NURBS surface machining test performed on a vertical machining center further validates the proposed approaches.
Ip Header Compression in IEEE 802.11 Mac Layer
Authors: Boopathi Mythili , Vani M.P.
Published: August 2013

In many services and applications the payload of the IP packet is almost of the same size or even smaller than the header. Over the end-to-end connection, comprised of multiple hops, these protocol headers are extremely important but over just one link (hop-to-hop) these headers serve no useful purpose. It is necessary to compress those headers, to save the bandwidth and use the expensive resources efficiently. To address this, we present an IP Header Compression (IPHC) technique for header compression. IEEE 802.11 (WLAN) is a technology that will play an important role in the next generations of wireless networks. WLAN technology doesnt support header compression techniques as part of the Medium Access Control layer at the moment. Header compression techniques such as IP Header Compression (IPHC) can be used to reduce the overhead of the IP-based traffic. The proposed system describes implementation of IPv4 and TCP header compression using IPHC as part of IEEE 802.11 MAC layer.