bluuebunny/crossref_metadata_2025 huggingface dataset:
Use of Relocation Device at Scanning of Polymeric Material Surface Quality
Authors: Pata Vladimír , Řezníček Martin , Sýkorová Libuše , Knedlova Jana , Malachova Martina
Published: December 2014

Nowadays, manufacturers and users of parts made of polymeric materials make increasing demands on surface quality of these parts. In order to fulfill these claims, it is necessary to use not only the quality measurement systems for surface quality inspection, but also suitable products that allow to set up the inspected polymeric component properly set up to the measuring system scanner. However, it is not sufficient. Due to the requirements of the customers or the production it is often necessary to repeat the surface quality measurement, which is more and more often done in 3D; that might be quite difficult. Except for special cases there should not be any marks done by the inspection workplace which might lower the inspected surface quality. Therefore it is not suitable to make mechanical marks such as scratch, ridge, etc. On the other hand, other types of marks done by non-invasive method, such as sticking paper marks, measuring cross, etc. is also not admissible as there might result in surface damage due to adhesive forces as well by mechanical or chemical processes. Thus it is necessary to take into account the fact that parts made of polymeric material can be so small that none of the above mentioned methods that are widely used nowadays cannot be applied just because of the dimensional reason.
Finite Element Analysis of Laminating Tools for Automotive Interior Parts
Authors: Croitoru Emilian Ionut , Măgurian Daniel , Oancea Gheorghe
Published: December 2014

This paper presents a method of finite element modeling and analysis used in the process of development of laminating tools of automotive interior parts. In this research, the automotive interior part considered for analysis is a center console part covered with leather. This part is subjected to concentrated loading and the stress variation within the complete assembly is determined. Also, due to the fact that the leather is stretched and glued to the plastic part using heat transfer between two molds, a thermal assessment is necessary. The results, in the form of deformations and tensions, and conclusions of both analyses will demonstrate the need to use this method in the development of laminating tools of automotive interior parts.
Mechatronic Approach to the Modeling of Machine Aggregates
Authors: Nad Milan , Steinhauser Jozef , Rolník Ladislav
Published: December 2014

Significant development of the new production technologies requires an adequate development of the production systems on which these technologies carried out. It is obvious that those facts affect the structural design of new advanced manufacturing systems and also require both research and development of new drive systems. In this context [1], drive systems have the character of complex dynamic systems with elements, resp. subsystems, which have both the different physical nature and in many cases are characterized by control, i.e. having features of the mechatronic systems. The conception of mechatronic drive systems modelling consists of an integration of knowledge from various technical disciplines (i.e. mechanics, electronics, control) to obtain a product with highest possible technical and economical parameters. In this light, the machine aggregates must be modelled as dynamic systems to drive a plant (mechanical load, mechanical working equipment) and to control the technological process.
The Loss of Plastic Properties Stability of Thin Tinplates and its Influence on Change of Corrosive Resistance
Authors: Spišák Emil , Majerníková Janka
Published: December 2014

Nowadays the thin tinplates are the most important material for a wraps production.Predominant majority of these sheets are treated by drawing, by which are made both parts of tin sheets. By reduction of thicknesses of thin steel sheets and by require speed of deformation during the wraps production made by drawing often leads to the loss of stability of plastic deformation and to its localization. This localization of deformation considerably influences the change of thickness of protective tin layer and its integrity. Because of this it leads to the reduction of thin steel sheets resistance towards corrosion.In contribution are therefore dependencies of stress and strain by uniaxial and biaxial tensile test by different levels of deformation of two types of sheets monitored. After plastic deformation were sheets put under the impact of corrosion environment and was evaluating influence of deformation largeness and localization of deformation at the corrosive resistance of thin tinplates sheets. In contribution are also analyzed some of the cases of concrete corrosive damage of lids, so-called twist lids.
Surface Morphology of Duplex Stainless Steel (DSS) in Dry Turning Process
Authors: Krolczyk Grzegorz M.
Published: December 2014

Sustainable manufacturing in most developed countries is one of principal goals in today manufacturing industry. The reduction in use of oil-based CLFs is most ecologically important task of machining processes. The paper presents the contribution in engineering of surfaces particularly in surface morphology of Stainless Steels. The objective of the investigation was to determine the surface texture of duplex stainless steel after turning with coated carbide tool point. The investigation included geometrical parameters of Surface Integrity for different cutting parameters in dry turning process of duplex stainless steel.
The Methodical Procedure for Designing of Clamping Jaws
Authors: Oravcova Jarmila
Published: December 2014

The paper deals with the clamping fixture jaws procedure design. The clamping jaw design methodology developed summarizes complex factors. These factors affect the clamping jaws design for the workpiece. Methodical design procedure consists of three stages. Namely, there are input date summary, clamping fixture design and the last design verification. The ANSYS simulation was used for the verification developing methodology. The components model simulation aim has been studied impact of clamping force position change to the cutting force reactions change. Research was conducted with different positions of jaws.
Vectorization of Scanned Paper-Based Engineering Drawings – Contemporary Software Abilities
Authors: Gramblička Matúš , Vaský Jozef
Published: December 2014

The contribution deals with the possibilities of the use of existing commercially available vectorization programs for recognition drawing entities in raster graphics format obtained by scanning of the engineering drawing. Drawing entities as a line (solid, dashed, dot-dashed etc.), dimension, hatch, various symbols, text, etc., have specific semantic for the designer defined by standards. Expert knows to interpret this graphic language and he knows to create a mental model of the real object. To be able interpret digital content of the engineering drawing obtained by scanning by the form of 3D computer model often requires to perform many intelligent operations. In the first step it is necessary to obtain such vector representation of the scanned drawing to be able to identify the original drawing entities. Suitability of using the contemporary commercial vectorizing programs for engineering drawings was verified on the test sample of the drawing entities and the results are published in the paper.
Automated In-Process Inspection Method in the Flexible Production System iCIM 3000
Authors: Ružarovský Roman , Delgado Sobrino Daynier Rolando , Holubek Radovan , Košťál Peter
Published: December 2014

The quality of products and production processes crucially influences the position of the enterprises on the market. The paper deals with the analysis of the activities of the test station, analysis of operations necessary to carry out the testing, what component is tested and which parameter is evaluated, where the measured values ​​are sent and how is processed the evaluation in the flexible production system iCIM 3000 to be found at the Institute. The result of the project is to analyze the principle and in-process methods of inspection and testing at the station and the principle of processing of the results, which are processed using mathematical and statistical operations. These in-process inspection methods automatically eliminate various influences and factors that negatively affect the accuracy of parts and labor capacity of the machine. It contributes to shortening the preparatory and subsidiary times and the correction of the tool adjustment in the operating position on the machine. It is belonged the automatic modification of part-programs to the functions of an active control.
Research on Improving Strategies of PoC Session Setup Delay Based on TD-SCDMA Network
Authors: Li Li Fu , Li Hong Liang , Gu Yong Jun
Published: December 2014

PoC is a half-duplex PTT service using VoIP technology based on cellular network packet domain carrying. However PoC uses the standard Session Initiation Protocol (SIP) to setup session. The standard SIP signaling is too long, which brings more setup delay and does not hold true the wireless communication network, so it must be cut. This paper researchs the method to reduce PoC session setup delay from SIP session cut. We achieve the testing results in the actual commercial network. The results shows that this method can effectivly shorten the PoC session setup delay.
Research on Mobile Information Service of the Library Based on WeChat
Authors: Wang Chang Quan
Published: December 2014

Mobile information service is one of the development direction of library information service, WeChat as an instant messaging products, has attracted the attention of all sectors from the beginning. The first analysis the current situation of mobile information service of library, points out existing problems; then introduce WeChat and WeChat public account, describes how to realize the function that the use query library information through the WeChat with the help of WeChat public platform as a carrier. And analyze the realization method of setting WeChat public platform, building interface server, certificating in the docking process and querying data in the background.
Research on Unstructured Data Security Exchange of Behavior Trusted in Smart Grid
Authors: Wang Chen , Li Wei Wei , Shi Jian , Zhou Cheng
Published: December 2014

In order to solve the security problem of data’s exchange and sharing among every information island, as well as between power enterprises and power customers, we propose data security exchange of user behavior trusted: recording the data’s essential attribute and user operation in clients; data transmission can be achieved by unified security exchange protocol; servers filter data according to data’s essential attribute, user operation and configure policy, by association analysis of customers’ abnormal behavior, and check user behavior trusted. By means of analysis, data exchange of user behavior trusted can ensure data’s security exchange from data transmission, data security and user behavior trusted three aspects in heterogeneous environment.
Semi-Blind Channel Estimation with Orthogonal Superimposed Training for SISO over Doubly Selective Channel
Authors: Li Cong  Ying , Huang Gao Ming , Gao Jun , Dou Gao Qi , He Chun Quan , Gao Yu Song
Published: December 2014

In this paper, a semi-blind estimator based on orthogonal superimposed training (OST) for the case of doubly selecting fading channel is proposed. With the aid of OST, the interference to channel estimation form data symbols can be eliminated completely. Moreover, data symbols can serve as pseudo-pilots to enhance the estimation performance. Simulation results illustrate the benefits of pseudo-pilots method.
The Study of Personal Information Security Problems on the Age of Big Data
Authors: Liu Hai Yan , Zhong Yong Wen
Published: December 2014

The arrival of the era of big data for the entire social development provides a great interests and values, but also led to the serious problem of personal information security. This paper analyzes three forms of the security of personal information is threated under the big data era, these three forms are: illegal data acquisition, data abuse, a violation of personal space. And then discusses the countermeasures of the security of personal information protection under the age of big data.
Localizing Jammer for Indoor Mobile Communication Networks
Authors: Phaiboon Supachai , Chatwaranon Arunee
Published: December 2014

This paper proposes an experimental study for localizing radio jammers in a multi floors building. We performed signal strength measurement to find propagation path loss characteristics in the building. Then communication nodes around the existing jammers were classified in order to determine a set of boundary nodes. The propagation path losses between the real jammers and the boundary nodes are evaluated by a vector pointer namely, the evaluation feedback metric, ez, to find the real jammer location. The proposed algorithm was validated via an indirect measurement called hearing range. The results demonstrate that our approach provides an effective method for jamming localization.
Formalization Model for a Reuse Approach of Software Architecture
Authors: Li Xiao Jian , Zheng Ying
Published: December 2014

Reuse of software architecture is a relatively difficult problem in the practice of software engineering realm. For solving the problem, this paper presents an approach which is based on architecture reflection. For the reflection mechanism, the main idea is separating system architecture into two levels – meta-level and base-level. And what’s more, this paper presents a formalization model for the approach by using Pi calculus.
Design of the Parallel to Serial Communication Conversion System Based on FPGA
Authors: Lu Jun Yong , Tu Fang Ming , Zhang Xiao
Published: December 2014

In this paper, a special communication conversion system from parallel to serial is implemented by FPGA (Field Programable Gate Array). The designs of the structure, the hardware and the software are described in detail. And the performance of the designed system is testified by both timing simulation and experiment, which prove the design to be simple and reliable.
A Kind of Implementation for ResourceIDService in GDA
Authors: Liu Yu Xi , Fang Hong Wang , Zhao Jia Kui , Gong Qing Shen , Yuan Bao
Published: December 2014

Generic data access (GDA) defines application program interface services that are needed to access public entity objects for the power system domain. In GDA services, the entity objects are designed on the basis of common information model (CIM). One way to realize ResourceIDService for GDA is proposed in this paper. The ResourceIDService contains get_resource_ids () as well as get_uris () methods. The implementation procedure for that of the two methods are described detailedly. Finally, experimental tests are used to demonstrate the correctness of the realization process for the two methods.
An Engineering Service Restoration Method after a 35kV Substation Outage
Authors: Qian Jun , Yan Zhen Ping , Qiu Qi Wei , Wang Mei , Zhou Jia Qing , Cheng Zheng Min , Sun Zhi Yi , Wang Jing Wei , Gu Hao Liang , Zhang Kai Xuan
Published: December 2014

The distribution system is at the end of the power system and is directly connected to the energy consumers, which makes the distribution network a vital part of the power system. When a substation suffers an outage, electricity service restoration measures must be taken as soon as possible to reduce the loss. Traditional restoration methods have disadvantages such as poor stability and bad convergence. This paper proposed an approach to resume the power supply after a 35kV substation outage with the help of Dijkstra’s shortest path algorithm. The proposed method is tested on a real distribution system. The result shows that the method is effective to solve the problem of electricity service restoration.
Analysis of Triggering Thyristor in Hybrid Energy Storage System
Authors: Long Xin Lin , Lu Jun Yong , Zhang Xiao , Li Chao , Wu Hai Feng
Published: December 2014

The power energy storage in battery transfers to capacitors through thyristor in hybrid energy storage, which makes the instantaneous power amplified. As the switch in Hybrid energy storage, the thyristor must satisfy its opening requirements , besides, the characteristics of the hybrid energy storage system is considered to design the width of trigger pulse, otherwise the thyristor can’t be opened that leads to failure of energy transfer. In this paper, the model of the system is established, the function of current to time is derived from the model, and then the minimum width of trigger pulse is calculated out. The simulation and experiment results are presented, which match with the designation well.
The Test Investigation and Design Improvements of Voltage Regulator Performance
Authors: Zong Yong , Xiao Xia , Zhu Rui
Published: December 2014

Voltage regulator is designed to automatically maintain the constant of regular voltage level. Every automotive IC has its own regulator module for analog and logic circuit power supply. The output load regulation and current consumption are directly related to the IC’s performance, or even the whole application module. The performance of regulator is not only related with the output parameters, but also the protection character. The over voltage protection feature guarantees the IC’s working environment within specific voltage input range. This article use one IDC’s (Intelligent Distribution Controller) regulator module to describe the design theory for regulator over voltage performance improvement. The test investigation and verification on ATE (Automatic Test Equipment) are demonstrated. The parameter of over voltage threshold is optimized obviously by 2% yield increasing.
The Business Model Analysis of Service-Oriented Enterprise
Authors: Wang Li , Zhang Jing
Published: December 2014

In this paper, we proposed value proposition, value network, resources, services and profit model as business model elements of Service-oriented Enterprise from the perspective of system by combing the related literature about business model elements. Based on this, we put forward four kinds of building ideas: business model based on customer demand, business model based on resource integration, business model based on service content, business model based on profit model and then explained by cases. Finally, the application of environmental of business model was compared. This study is help to guide other service-oriented enterprises to construct business model effectively.
Introducing BOPPPS Computer Language Teaching Method
Authors: Fu Yun Xia , Ren Xiao Yan , Yang Xiao Yan
Published: December 2014

In accordance with the ideas of MOOC and the teaching features of BOPPPS, In computer language courses in the interpretation of three control structure section of ingenious introduction BOPPPS technology, contribute to the realization of the algorithm, easier for students to understand and grasp.
Application and Development of Distributed Energy Systems in China
Authors: Wang Yong Li , Shi Dan , Fan Li Shan , Han Ji Qiong
Published: December 2014

With the development of smart grid, the application of distributed energy systems has been increased largely in china. Biomass power generations, solar power generations and wind power generations with small capacity can be used as to be distributed energy systems. This paper puts forward the definition of distributed energy systems, and gives the limited capacity variable range of it. Secondly, the main obstacle for the development of distributed energy systems has been analyzed including technical Factors, policy factors and mechanisms, market factors and so on. Finally, it analyses the implementation strategy of distributed energy systems in China, such as the influential factors analysis, efficiency research and the rational usage of distributed energy systems. These analyses can improve the application and deep research of distributed energy systems in China.
Frequent Patterns Discovery in Complex Structured Data with Higher-Order Logic
Authors: Li Guang Yuan
Published: December 2014

Frequent patterns mining is one of the most important tasks in data mining, traditional algorithms usually deal with this problem in simple structured data, but there are so much complex data in reality, for example, the tree type of data, graph type of data, and so on, when investigating these complex structured data, constrains are often needed to be given in order to narrow the search space, however, this will lose some of the useful interesting patterns. In this paper, we present a novel algorithm based on higher-order logic to discover frequent patterns in complex structured data, the novel method can overcome some drawbacks occurring in traditional algorithms. We use Escher, which is a higher-order logic programming language, to discover frequent patterns in complex structured data. Experimental results show that the proposal algorithm is efficient and scalable.
Research on Surface Reconstruction from Intersecting Curves
Authors: Cheng Jun Ting , Liu Xin Kuan
Published: December 2014

This paper comes up with an stereo matching method for handy-scanner based on cross light. The handy-scan system with two cameras and one cross laser beam can scan very detail accurately through cross laser. 3D information is gained by dealing with cross laser image. What we do aims at estimating the transformation of the measured objects under the world coordinate. In order to achieve this goal, firstly we use 8-points algorithm to compute fundamental matrix. Then, the points on the left and the right can be matched based on fundamental matrix. The 3D coordinates of the point on the cross laser can be obtained by triangulation and curve surface differential. The experiment proves that this algorithm solves the problem of calculating the matching points in disorder. And in some way, it increases efficiency of matching cross laser stripes.
Surface Roughness Prediction Model Based on AE in Grinding
Authors: Ding Ning , Yu Wen Ze
Published: December 2014

Based on the theory of roughness during grinding and the theory of fuzzy-neural network, a new intelligent prediction model is developed in this paper. The inputs for the model are the grinding parameters and the AE signals. Beijing Shenghua SAEU2S system was used to collect and analyze the signals of acoustic emission. The experiment was conducted, and the results verify the feasibility of the proposed model.
A Special Multiobjective Evolutionary Algorithm for Solving Complicated Nonlinear Equations Systems
Authors: Liu Chun An
Published: December 2014

It is well known that nonlinear equations systems (NESS) is a subclass of nonlinear optimization problem, it exists in many application fields, such as information industry, network design, mechanics and robotics, etc.. How to design feasible and effective optimization methods to obtain the optimal solution or satisfied precision requirement’s optimal solution for complicated NESS is very important in computation fields. In this paper, each nonlinear sub-equation of NESS is approximately regarded as a sub-objective function of multi-objective optimization problem, then the original nonlinear equations systems is transformed into a multi-objective optimization problem, and the equivalence relation of the solution between the original NESS and the transformed multi-objective optimization problem is given. In order to effectively solve the nonlinear equations systems, a self-adaptive levy mutation operation is proposed, and a multi-objective optimization evolutionary algorithm to solve the nonlinear equations systems was designed. Computer simulations demonstrate the proposed algorithm can not only increase the diversity of evolutionary population but also make the evolution population quickly to approach the optimal solution or satisfied precision requirement’s optimal solution.
Hierarchy Topic Detection and Hot Topic Identification
Authors: Zhou Xue Mei , Cheng Shan Ying
Published: December 2014

Due to the problem that the existing topic detection algorithms can not satisfy accuracy,real time and topic hierarchical clustering at the same time, this article builds a hierarchy topic detection algorithm based on improved single pass clustering algorithm. In addition, using public opinion evaluation indexes to analyze topic temperature,the method proposed in this paper can detect hot topics accurately and timely while showing the hierarchical structure of the topic .
Adaptive Radar Sensitivity Time Control Based on Linear Prediction Sea Clutter
Authors: Liu Yun Feng , Suo Ji Dong , Liu Xiao Ming , Li Bo
Published: December 2014

Sea clutter is interference background in radar target processing. It is difficult to detect long-range weak target in sea clutter. Sea clutter signal changes complex, with high intensity. For close signal, radar receiver will overload and reach saturation point. We are interested in the most dynamic range for displaying target echo and fast changing component of clutter. By analyzing spatial and temporal correlation of sea clutter, slow changing component can be minus from sea clutter. The innovation of this paper is to propose a linear prediction error method for sea clutter to increase dynamic range of radar receiver. It prevents overloading and reaching saturation point at close range.
Research of the Method for Traffic Generating Based on Genetic Algorithm
Authors: Bo Liu
Published: December 2014

It has great impact on result of the network test or simulation if the test simulated traffic is corresponding to real situation. The network traffic is the superposition of different traffic streams in the actual usage of the network. But because of the complexity and time-consumption to generate different traffic streams, it is difficult to generate the network traffic in the simulation for the large scale network. This paper proposes a kind of method for traffic generating based on genetic algorithm .According to building the self-similar traffic model ,the optimal values of the model’s parameters has been obtained. A case study shows the effectiveness of the method for the network reliability.
The Detection Algorithm Development of Cutting Quality Defects of Paper Cutter Based on Regional Identification
Authors: Ji Tie Ling , Teng Ya Ting
Published: December 2014

This paper has a brief introduction to a algorithm that can automatically identify the defective cutting region when automatic paper cutter does quality analysis. The algorithm analyzed the characteristics of processed shear mark image,detected defects,found a critical point of defective part ,then a unique regional recognition algorithm was developed based on the basis of the general processing algorithm. The algorithms can pinpoint the region that cutting defects exist according to the coordinates of critical point accurately, improve the efficiency of quality analysis, and also has stated that image processing is available in the regional recognition of automatic paper cutter.
The Research of Infrared Image Denoising Algorithm Based on Curvelet Transform
Authors: Yu Wei Bo , Tong Dong , Liu Fang Xue , Liu Ke Ping
Published: December 2014

Since the infrared image has the problem of poor contrast, edge blur, low noise ratio, noisy and other shortcomings, this paper presents an improved threshold denoising algorithm based on curvelet transform, using a combination of hard and soft threshold methods to form a new threshold based functions. Compare to the conventional hard threshold, soft threshold, de-noising based on wavelet transform method, the proposed denoising method can obtain better PSNR and visual characteristics, retain more details
Traffic Monitoring Technique Based on Kalman Filtering and Multi-Feature Matching
Authors: Liu Lan Ying
Published: December 2014

Traffic monitoring system based on image processing technology,which can reflect the information of traffic .The cost of use and maintenance is relatively low ,which can be widely applied to monitor complex area and crossing the road. In this paper, a new algorithm for traffic monitoring had be proposed, which combined the SIFT algorithm and kalman filter. Firstly, extracting SIFT targets based on the Pyramid of Gauss difference image, target position was doped out by kalman filter and builded the adapted window. Finally, the SIFT algorithm was used to extract target features and matching them. According to the next kalman location set prediction area, in this area combinated with target center and SIFT features, then selected the best objection for accurate tracking,acquire traffic parameters with traffic fiow and average speed.Experimental results show that detection accuracy is more than 91%,the method has strong robustness and realtime。
Fuzzy Analytic Hierarchy Process Method for Civil Aviation Airport Security Information Management
Authors: Zhang Ning , Zhu Jin Fu
Published: December 2014

In the study, the method based on the combination of analytic hierarchy process(AHP) and fuzzy theory is proposed to evaluate civil aviation airport security information management. Assessment indexes of civil aviation airport security information management are studied and given, and the hierarchic tree is formulated based on assessment indexes of civil aviation airport security information management. On the basis of describing evaluation indexes for civil aviation airport security information management, and the evaluation model of civil aviation airport security information management is constructed based on fuzzy analytic hierarchy process. Finally, the case is used to testify the effectiveness of the proposed fuzzy analytic hierarchy process method.
Application of Machine Vision Based on DM642 of Embedded System
Authors: Liu Zhen Yu , Xu He Wen
Published: December 2014

This article takes the industrial robot workpiece sorting issue as a background, introduces an embedded machine vision system based on DM642. The system realizes the image preprocessing, feature extraction, image recognition and other work in DSP, and transmits detection results to robot controller through network interface. Experimental results show that the system can effectively solve the problem of sorting regular geometric workpiece, and can meet the requirements of real-time and accuracy in industrial applications.
A 3D Measurement Method Based on Three Frequencies PSP
Authors: Song Li Mei , Xing Guang Xin , Wang Peng Qiang , Xi Jiang Tao , Guo Qing Hua
Published: December 2014

This paper proposes a method of global phase unwrapping used in multi-frequency three-dimensional (3D) measurements. In this method, three kinds of optical information which change in accordance with trigonometric function (sine or cosine) to the objects. The optical information cycles is P1, P2 and P3. Each waveform should 4-8 steps phase shifts. Then, calculate the phase value of each cycle. The composited phase value of two cycles and the final composited phase value of three cycles are calculated by image shift of each cycle. Finally, calculate the global phase value of each cycle based on the composited phase, thus, all the 3D coordinates of objects can be obtain after 3D reconstruction. The proposed method can solves the object surfaces color changing largely in 3D measurements. This method realizes high precision measurement without spray developer and achieves the protection of the environment.
Application of IOT (Internet of Things) Technology in Chemical Testing with Large-Scale Analysis Instruments
Authors: Chen Hong Bo , Zheng Yi , Han Yan Gang
Published: December 2014

In the field of chemical testing, it is of great importance to improve the accuracy and efficiency and reduce the risk caused by artificial factor with modern intelligent methods, which are critical to the standard development of testing labs. In this paper, intelligent control during the whole process of chromatography and mass spectrometry analysis with cloud computing technology was realized and discussed in detail. The intelligent testing system could be applied to the chemical analysis labs and spread to other fields.
Identification of Linear Tire Cornering Stiffness Using Subspace Methods
Authors: Ba Teng Yue , Guan Xi Qiang , Zhang Jian Wu
Published: December 2014

In this paper, subspace identification methods are proposed to estimate the linear tire cornering stiffness, which are only based on the road tests data without any prior knowledge. This kind of data-driven method has strong robustness. In order to validate the feasibility and effectiveness of the algorithms, a series of standard road tests are carried out. Comparing with different subspace algorithms used in road tests, it can be concluded that the front tire cornering stiffness can be estimated accurately by the N4SID and CCA methods when the double lane change test data are taken into analysis.
Simulation on Detection Probability Loss of OTHR under Oppressive Active Jamming
Authors: Jia Jing , Sheng Wen
Published: December 2014

Aim to quantificational evaluation of capability of countering oppressive active jamming for Sky-wave Over-The-Horizon Radar (SWOTHR), main oppressive jamming types for SWOTHR and measures of countering oppressive jamming of SWOTHR are analyzed minutely. Based on idea of power countermeasure, evaluation index of detection probability loss is put forward. Based on signal-to-interference ratio equation including the main measures of anti-jamming, simulation models of detection probability loss are established. Simulation results show that SWOTHR has strong capability of countering oppressive active jamming and capability of countering main lobe interference stronger than side lobe interference. And simulation results also confirm feasibility and validity of evaluation index and models.
The Optimal Selection of Monitoring Parameters for Pitting Damage of Gears Based on Fault Trend Analysis
Authors: Luo Jian Lu , Tan Xiao Dong , Liu Ying , Li Qing
Published: December 2014

Tooth pitting in gears is one of the most critical fault modes in gearboxes, and monitoring the increase of tooth pitting damage can avoid great risk to gearboxes. The optimal selection of monitoring parameters in gearboxes can reduce the monitoring cost and improve the reliability on the basis of meeting monitoring requirements. To better track the increase of pitting damage, monitoring parameters should include abundant information of pitting growth in its evolution process. Hence, this paper proposes a novel approach to select optimal monitoring parameters based on fault trend analysis of pitting growth. With the analytical formulations of tooth pitting, the dependencies between damage levels of tooth pitting and the reduction of mesh stiffness can be obtained, then the damage dynamics of the gearbox system due to tooth pitting can be built. Afterwards, the dynamic responses of generalized parameters in the models of pitting levels can be simulated, and their condition indicators can be obtained by using effective signal processing methods. Then, the sensitivities of each generalized parameter to tooth damage can be calculated, and the optimal monitoring parameters can be determined according to the size of sensitivities. The simulation results show that monitoring the acceleration of gear and calculating its kurtosis can effectively track tooth pitting growth.
PB-SVM Ensemble: A SVM Ensemble Algorithm Based on SVM
Authors: Wang Bo , Yao Yu Kai , Wang Xiao Ping , Chen Xiao Yun
Published: December 2014

As one of the most popular and effective classification algorithms, Support Vector Machine (SVM) has attracted much attention in recent years. Classifiers ensemble is a research direction in machine learning and statistics, it often gives a higher classification accuracy than the single classifier. This paper proposes a new ensemble algorithm based on SVM. The proposed classification algorithm PB-SVM Ensemble consists of some SVM classifiers produced by PCAenSVM and fifty classifiers trained using Bagging, the results are combined to make the final decision on testing set using majority voting. The performance of PB-SVM Ensemble are evaluated on six datasets which are from UCI repository, Statlog or the famous research. The results of the experiment are compared with LibSVM, PCAenSVM and Bagging. PB-SVM Ensemble outperform other three algorithms in classification accuracy, and at the same time keep a higher confidence of accuracy than Bagging.
Analysis of Wavelet Decomposition on Acoustic Spectrums for Gas Composition Sensing
Authors: Zhu Ling Zi , Zhu Ming , Liu Ting Ting
Published: December 2014

Wavelet decomposition on acoustic spectrums is a novel method in the field of gas composition sensing. However, the existing method doesn’t explain the relationship between the characteristics of acoustic gas spectrums and the results of wavelet decomposition, and it has high computational complexity. In this paper, we firstly find it can basically keep the recognition rate if the detail coefficients from wavelet decomposition are used to construct samples instead of characteristic coefficients extracted from the detail ones. Nevertheless, the detail coefficients can represent the properties of acoustic gas spectrums, which can’t be represented by characteristic coefficients. Then, we find points of detail coefficients with relatively high recognition rate are mainly distributed in the first three layers. Therefore, it can reduce the computational complexity when three-level decomposition is directly utilized in the method of gas composition sensing.
Damage Identification Method Based on LMD Sample Entropy and SVM for Oil Derrick
Authors: Zou Long Qing , Chen Gui Juan , Gao Xing Jiang , Jiang Chu Hao
Published: December 2014

To identify damaged position of oil derrick, this paper presents a damage identification method for oil derrick using LMD and sample entropy to extract eigenvector and SVM to identify classes. Hammering vibration response signal of damaged derrick is decomposed into several PF components. The sample entropy of PF components is calculated and used as eigenvectors. SVM classifier is constructed based on eigenvectors of different damage location, and this method can identify damage position accurately. This method is verified by comparison with recognition result of LMD and information entropy.
Design of Automatic Cleaning Device of PAC Dosing Filter
Authors: Shao Chang Ling , Ye Sheng Li , Xia Yun Fei
Published: December 2014

This paper first introduces PAC dosing system, then research the feasibility of the project goal. confirmed the goal can be achieved. Research on the project, and analysis the process of this project, and implementation finally. After the PAC dosing filter automatic cleaning device completed, control charts are used to verify the device, results show that, PAC amount is controlled in the range of 1.8~2.2mg/L, COD is above 35mg/L.
Kinematics Analysis and Simulation of Upper Limb Rehabilitation Robot
Authors: Tang De Dong , Zhang Ya Qi , Liu Yi
Published: December 2014

In order to solve the deficiency of existing rehabilitation robot a novel upper limb rehabilitation robot structure is designed. Kinematics model is established by the method of Denavit-Hartenberg. The robot is driven by pneumatic muscle. Simulation on the robot movement is carried out by the simmechanics of matlab. When the joint is driven, the angle、angular velocity and working space of robot are all obtained. Feasibility of the robot design is confirmed by the simulation results.
MATLAB GUI-Based Lifting Optimization Decision System for Multiple-Lifts-Single-Crane
Authors: Li Wen Jiang , Leng Zhou , Jia Chuan Guo , Lu Peng , Liu Yan Xing
Published: December 2014

Combined with powerful mathematical capability of MATLAB and the excellent interfacial design function of GUIDE, a lifting optimization decision system for multiple-lifts-single-crane is proposed which is feasible in electrical equipment lifting tasks. Based on existing approaches, a novel algorithm is proposed for selecting appropriate cranes and determining their corresponding optimum locations, resulting a lifting optimization system. This system can minimize the number of crane locations on the premise of avoiding potential spatial conflicts. To investigate its performance, a case example is conducted. It is demonstrated that the utility of this system for multiple-lifts-single-crane lifting tasks which also allow users have a deeper intuitive judgment to the lifting process.
Research of Robust Flight Control Algorithm for Quadrotor UAV
Authors: Hu Yun Dou , Yue Feng Fa , Hu Dan Dan , Gao Qing Ji
Published: December 2014

For quadrotor unmanned air vehicles (UAVs) nonlinear control problems under disturbance conditions, a nested loop control approach is presented to realize robust control. The robust control approach is proposed to solve the stabilization and navigation problems in the quadrotor. The robust control strategy is composed of two controllers. A nonlinear backstepping controller is designed for the inner loop to stabilize the attitude angle. A PID controller based on BP neural network is designed for the outer loop in order to generate the reference path for the inner loop. Numerous simulations and flight test experiments have been made to study the performance of controller based on the independently developed quadrotor UAV. The results illustrate that the proposed controller has good stability, maneuverability and robustness.
Research on Dynamics Simulation of Buffering Process of Docking Mechanism
Authors: Zhang Yuan , Zhou Li Li , Wang Jian , Fan Chang Zhen
Published: December 2014

On-orbit service technology can extend the working life of the spacecraft, and improve the ability to perform various tasks. Docking mechanism is the key equipment of the space docking. The cushion performance of the system determines the dynamic characteristics in the docking process, and it is one of the important factors influencing the docking success or not. It is established that mathematical modeling of the new grasping mechanism in the buffering process, due to lack of the experiment equipments, the dynamic simulation on computer is an effective method to test and verify the parameters or evaluate the performance of the buffer system designed. Simulation analysis is conducted to get the corresponding buffer force for four different sets of buffer parameter, and it provides important basis for docking cushioning structure optimization.
Research on the Model-Building Error for EMS Maglev Vehicles
Authors: Zhang Xiao , Lu Jun Yong , Long Xin Lin
Published: December 2014

To estimate the influences of uncertain factors on the modeling error of maglev vehicles, the single electro-magnet is taken as the object in this paper. Researches on the model-building error are carried out, including factors of the uncertainty of the inductor, the elasticity of the guideway and the coupling between Modules. Also, the model-building errors are analyzed numerically from the view of L∞ norm. And the calculation results are presented, which shows severe model-building severe error with the simplified model. The results are revelatory to comprehend the phenomena of the vehicle’s vibration, and to search after new methods of levitation control for EMS maglev vehicles.
Study on Adaptive Genetic Simulated Annealing Algorithm in Association Rules Mining
Authors: Jiang Fei
Published: December 2014

Premature occurring in the process of web log association rule mining by genetic algorithm may lead to no globally optimal solution. In order to avoid such a situation, this paper proposes Web log mining algorithm of association rules based on adaptive genetic strategy, simulated annealing. Based on genetic simulated annealing strategy, the algorithm ensures the diversity of the population from one generation to the application of parallel processing technology. In addition, this algorithm introduces the adaptive crossover probability and mutation probability so as to improve the algorithm's global searching ability. Experimental results show that this algorithm can significantly enhance mining speed and can effectively avoid premature, thus of better strong global convergence.
Transmission Characteristics Analysis of Spherical Hinge with Clearance
Authors: Xiong Ling Hua , Zhang Zhe Si
Published: December 2014

Spherical hinge as a kinematic pair is widely used in mechanical engineering, but clearance inevitably exists in it and reduces the run precision of the mechanical system. In this paper, two-mode theory of nonlinear spring-damper contact force and modified Coulomb friction model are used for creating a virtual prototype model of a kinematic pair with clearance. Drive force is calculated in 4 kinds of working conditions, 3 different sizes of clearance. Influence of the clearance on accuracy of the transmission force is discussed.
A Study on Control System for Four-Wheels Independent Driving and Steering Electric Vehicle
Authors: Lai Xin , Chen Xin Bo , Wu Xiao Jun , Liang Dong
Published: December 2014

The structure and principle of four-wheels independent driving and steering (4WIS-4WID) electric vehicle are presented firstly, and on this basis the structure of network control system base on CAN bus is built. Kinematics and dynamics models of typical steering modes (such as all wheel steering, front (rear) wheel steering, parallel steering, zero-radius steering) are built, and the control strategy is presented. The experimental results show that the control system structure and control algorithm are effective.
Plastic Tank Temperature Control System Based on OPC Technology
Authors: Wang Lu , Ren You Zhi , Liu Hui , Yang Ya Wei , Zeng Qian
Published: December 2014

This paper analyzes the characteristics of the PLC and MATLAB, describes the OPC technology and introduces the system structures and procedures which uses the OPC technology to achieve the exchange of data between PLC and MATLAB system. For example, in the plastic tank temperature control system, it mentions the BP neural network PID control algorithm which is applied to the PLC control system by using the MATLAB intelligent controller. The results show that this control method is simple and the control effect is good, much better than the traditional PID control.
Configuration Design and Finite Element Analysis for Key Components of the New-Type Sprayer
Authors: Zhang Yuan , Li Kun , Wei Qiang , Meng Bo Yang
Published: December 2014

According to the three-wheeled high clearance sprayer on the current market, the traditional empirical design method can hardly be used for effective stress distribution calculation and structural optimization, so it leads to the unreasonable structural design. Based on the overall structure of the sprayer design, a new-type high clearance sprayer designed, It is mainly composed of the engine-powered diaphragm pump power transmission parts, the power steering of scalable universal joint, the rear wheel steering mechanism and other components. Meanwhile, the finite element analysis and structural optimization on the sprayer frame have been finished. Therefore, the results showed that the frame realized the lightweight on the premise of the demand of performance and stiffness, each mechanism’s matching performance of sprayer meets the design requirements, and this approach provides a beneficial investigation into the future sprayer design.