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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Institute of Intelligent Systems
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Korean Institute of Intelligent Systems
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Volume & Issues
Volume 19, Issue 6 - Dec 2009
Volume 19, Issue 5 - Oct 2009
Volume 19, Issue 4 - Aug 2009
Volume 19, Issue 3 - Jun 2009
Volume 19, Issue 2 - Apr 2009
Volume 19, Issue 1 - Feb 2009
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Feature Extraction and Classification of High Dimensional Biomedical Spectral Data
Cho, Jae-Hoon ; Park, Jin-Il ; Lee, Dae-Jong ; Chun, Myung-Geun ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 297~303
DOI : 10.5391/JKIIS.2009.19.3.297
In this paper, we propose the biomedical spectral pattern classification techniques by the fusion scheme based on the SpPCA and MLP in extended feature space. A conventional PCA technique for the dimension reduction has the problem that it can't find an optimal transformation matrix if the property of input data is nonlinear. To overcome this drawback, we extract features by the SpPCA technique in extended space which use the local patterns rather than whole patterns. In the classification step, individual classifier based on MLP calculates the similarity of each class for local features. Finally, biomedical spectral patterns is classified by the fusion scheme to effectively combine the individual information. As the simulation results to verify the effectiveness, the proposed method showed more improved classification results than conventional methods.
Target extraction in FLIR image using Bi-modality of local characteristic and Chamfer distance
Lee, Hee-Yul ; Kim, Se-Yun ; Kim, Jong-Hwan ; Kwak, Dong-Min ; Choi, Byung-Jae ; Joo, Young-Bok ; Park, Kil-Houm ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 304~310
DOI : 10.5391/JKIIS.2009.19.3.304
In this paper, target extraction method in FLIR(forward-looking infrared) images based on fuzzy thresholding which used bi-modality and adjacency to determine membership value is proposed. The bi-modality represents how a pixel is classified into a part of target using distribution of pixel values in a local region, and The adjacency is a measure to represent how each pixel is far from the target region. First, membership value is calculated using above two measures, and then fuzzy thresholding is performed to extract the target. To evaluate performance of proposed target extraction method, we compare other segmentation methods using various FLIR tank image. Experimental results show that the proposed algorithm is a good segmentation performance.
Real-Time Motion Estimation Algorithm for Mobile Surveillance Robot
Han, Cheol-Hoon ; Sim, Kwee-Bo ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 311~316
DOI : 10.5391/JKIIS.2009.19.3.311
This paper presents the motion estimation algorithm on real-time for mobile surveillance robot using particle filter. the particle filter that based on the monte carlo's sampling method, use bayesian conditional probability model which having prior distribution probability and posterior distribution probability. However, the initial probability density was set to define randomly in the most of particle filter. In this paper, we find first the initial probability density using Sum of Absolute Difference(SAD). and we applied it in the partical filter. In result, more robust real-time estimation and tracking system on the randomly moving object was realized in the mobile surveillance robot environments.
Digital Image Stabilization Technique of Robot using Motion Sensor
Oh, Jung-Suk ; Sim, Kwee-Bo ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 317~322
DOI : 10.5391/JKIIS.2009.19.3.317
If vibration occurs due to fast movement of the robot, the camera image is unstable. No longer the eyes of a robot can not perform the role. Research methods for the stabilization of shaky video is required. The most popular method is to use the motion vector. But, the drawback to this method will require a large amount of operation. And the limits of the embedded robot. Therefore, in real-time transmission of images to be difficult. This paper proposes a motion sensor using the image stabilization. Uses data that is output from the motion sensor. So, not related to the progress of the robot movement is a way to remove it from the video.
Decentralized Fuzzy Output Feedback Control of Nonlinear Networked Control Systems for Wireless Sensor Network
Joo, Young-Hoon ; Ra, In-Ho ; Koo, Geun-Bum ; Park, Jin-Bae ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 323~328
DOI : 10.5391/JKIIS.2009.19.3.323
In this paper, a decentralized fuzzy output feedback controller for the nonlinear networked control system is proposed for wireless sensor network. Especially, it is assumed that the networked control system has the output packet loss and the input transmission failure. For the fuzzy control of the nonlinear subsystem, it presents Takagi-Sugeno (T-S) fuzzy model of each subsystem and it designs the decentralized fuzzy output feedback controller. The stability condition of the closed-loop system with the proposed controller is obtained by Lyapunov functional. The obtained stability condition is represented to the linear matrix inequality (LMI) form, and the control gain is obtained by LMI. An example is given to show the verification discussed throughout the paper.
Design of Optimized Fuzzy PD Cascade Controller Based on Parallel Genetic Algorithms
Jung, Seung-Hyun ; Choi, Jeoung-Nae ; Oh, Sung-Kwun ; Kim, Hyun-Ki ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 329~336
DOI : 10.5391/JKIIS.2009.19.3.329
In this paper, we propose the design of an optimized fuzzy cascade controller for rotary inverted pendulum system by means of Hierarchical Fair Competition-based Genetic Algorithms (HFCGA) which is a kind of parallel genetic algorithms. The rotary inverted pendulum system is the system for controlling the inclination of pendulum axis through the adjustment of rotating arm. The control objective of the system is to control the position of rotating arm and to make the pendulum maintain the unstable equilibrium point of vertical position. To control rotary inverted pendulum system, we designs the fuzzy cascade controller scheme consisted of two fuzzy controllers and optimizes the parameters of the designed controller by means of HFCGA. A comparative analysis between the simulation and the practical experiment demonstrates that the proposed HFCGA based fuzzy cascade controller leads to superb performance in comparison with the conventional LQR controller as well as HFCGA based PD cascade controller.
Delay-range-dependent Stability Analysis and Stabilization for Nonlinear Systems : T-S Fuzzy Model Approach
Song, Min-Kook ; Park, Jin-Bae ; Kim, Jin-Kyu ; Joo, Young-Hoon ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 337~342
DOI : 10.5391/JKIIS.2009.19.3.337
This paper concerns delay-range-dependent robust stability and stabilization for time-delay nonliner system via T-S fuzzy model approach. The time delay is assumed to be a time-varying continuous function belonging to a given range. On the basis of a novel Lyapunov-Krasovskii functional, which includes the information of the range, delay-range-dependent stability criteria are established in terms of linear matrix inequality. It is shown that the new criteria can provide less conservative results than some existing ones. Moreover, the stability criteria are also used to design the stabilizing state-feedback controllers. Numerical examples are given to demonstrate the applicability of the proposed approach.
From Computing Distribution of Email Responses for Each User Cluster To Construct User Preference based Anti-spam Mail System
Kim, Jong-Wan ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 343~349
DOI : 10.5391/JKIIS.2009.19.3.343
In this paper, it would be shown that individuals can have different responses to the same email based on their preferences through computing the distributions of user clusters' email responses from clustering results based on email users' preference information. This paper presents an approach that incorporates user preferences to construct an anti-spam mail system, which is different from the conventional content-based ones. We consider email category information derived from the email content as well as user preference information. We also build a user preference ontology to formally represent the important concepts and rules derived from a data mining process and then apply a rule optimization procedure to exclude unnecessary rules. Experimental results show that our user preference based system achieves good performance in terms of accuracy, the rules derived from the system and human comprehensibility.
A study on interval-valued necessity measures through the Choquet integral criterian
Jang, Lee-Chae ; Kim, Tae-Kyun ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 350~354
DOI : 10.5391/JKIIS.2009.19.3.350
[Fuzzy Sets and Systems, vol.157, pp.3025-2039, 2006] discussed the representation of necessity measure through the Choquet integral criterian. He also considered a decision maker who ranks necessity measures related with Choquet integral representation. Our motivation of this paper is that a decision maker have an "ambiguity" necessity measure to present preferences. In this paper, we discuss the representation of interval-valued necessity measures through the Choquet integral criterian.
Systematic Singular Association for Group Behaviors of a Swarm System
Jung, Hah-Min ; Kim, Dong-Hun ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 355~362
DOI : 10.5391/JKIIS.2009.19.3.355
In this paper, we present a framework for managing group behaviors in multi-agent swarm systems. The framework explores the benefits by dynamic associations with the proposed artificial potential functions to realize complex swarming behaviors. A key development is the introduction of a set of flocking by dynamic association (DA) algorithms that effectively deal with a host of swarming issues such as cooperation for fast migration to a target, flexible and agile formation, and inter-agent collision avoidance. In particular, the DA algorithms employ a so-called systematic singular association (SSA) rule for fast migration to a target and compact formation through inter-agent interaction. The resulting algorithms enjoy two important interrelated benefits. First, the SSA rule greatly reduces time-consuming for migration and satisfies low possibility that agents may be lost. Secondly, the SSA is advantageous for practical implementations, since it considers for agents even the case that a target is blocked by obstacles. Extensive simulation presents to illustrate the viability and effectiveness of the proposed framework.
Generalization of Ontology Instances Based on WordNet and Google
Kang, Sin-Jae ; Kang, In-Su ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 363~370
DOI : 10.5391/JKIIS.2009.19.3.363
In order to populate ontology, this paper presents a generalization method of ontology instances, extracted from texts and web pages, by using unsupervised learning techniques for word sense disambiguation, which uses open APIs and lexical resources such as Google and WordNet. According to the experimental results, our method achieved a 15.8% improvement over the previous research.
The concept of σ-morphism as a probability measure on the set of effects
Yun, Yong-Sik ; Kang, Kyoung-Hun ; Park, Jin-Won ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 371~374
DOI : 10.5391/JKIIS.2009.19.3.371
In this paper, we introduce the concepts of effects and observable as generalizations of event and random variable, respectively. Also, we introduce the concept of
-morphism and we investigate some results on
-morphism as a probability measure on the set of effects.
Development of Steering Actuator for Unmanned Vehicle Based on Magnetic Marker
Im, Dae-Yeong ; Ryoo, Young-Jae ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 375~380
DOI : 10.5391/JKIIS.2009.19.3.375
In this paper, a steering actuator is designed and developed for an unmanned vehicle based on magnetic marker. One of the most important component of an unmanned vehicle is a steering actuator to follow magnetic road. Thus, we develop a steering actuator using a stepping motor and adopt to a new frequency control method depended on speed of the vehicle. In order to verify the usability of the developed system, the setup of unmanned vehicle installed the designed steering actuator is tested on magnetic road.
Path-planning using Modified Genetic Algorithm and SLAM based on Feature Map for Autonomous Vehicle
Kim, Jung-Min ; Heo, Jung-Min ; Jung, Sung-Young ; Kim, Sung-Shin ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 381~387
DOI : 10.5391/JKIIS.2009.19.3.381
This paper is presented simultaneous localization and mapping (SLAM) based on feature map and path-planning using modified genetic algorithm for efficient driving of autonomous vehicle. The biggest problem for autonomous vehicle from now is environment adaptation. There are two cases that its new location is recognized in the new environment and is identified under unknown or new location in the map related kid-napping problem. In this paper, SLAM based on feature map using ultrasonic sensor is proposed to solved the environment adaptation problem in autonomous driving. And a modified genetic algorithm employed to optimize path-planning. We designed and built an autonomous vehicle. The proposed algorithm is applied the autonomous vehicle to show the performance. Experimental result, we verified that fast optimized path-planning and efficient SLAM is possible.
Study on Interaction of Planar Redundant Manipulator with Environment based on Intelligent Control
Yoo, Bong-Soo ; Kim, Sin-Ho ; Joh, Joong-Seon ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 388~397
DOI : 10.5391/JKIIS.2009.19.3.388
There are many tasks which require robotic manipulators interaction with environment. It consists of three control problems, i.e., position control, impact control and force control. The position control means the way of reaching to the environment. The moment of touching to the environment yields the impact control problem and the force control is to maintain the desired force trajectory after the impact with the environment. These three control problems occur in sequence, so each control algorithm can be developed independently. Especially for redundant manipulators, each of these three control problems has been important independent research topic. For example, joint torque minimization and impulse minimization are typical techniques for such control problems. The three control problems are considered as a single task in this paper. The position control strategy is developed to improve the performance of the task, i.e., minimization of the individual joint torques and impulse. Therefore, initial conditions of the impact control problem are optimized at the previous position control algorithm. Such a control strategy yields improved result of the impact control. Similarly, the initial conditions for the force control problem are indirectly optimized by the previous position control and impact control strategies. The force control algorithm uses the individual joint torque minimization concept. It also minimizes the force disturbances. The simulation results show the proposed control strategy works well.
Implementation of Intelligent Container System and Information Processing Using Fuzzy Logic
Son, Sang-Hyuk ; Kang, Geun-Taek ; Lee, Won-Chang ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 398~403
DOI : 10.5391/JKIIS.2009.19.3.398
The recent trend of logistics demands for improved monitoring system of the inside of containers including current temperature and other environmental conditions. This paper presents an information processing technique with fuzzy logic that recognizes the current situations inside the target container and can be implemented on intelligent container systems. The ZigBee modules are used to collect information such as temperature, humidity, and shock inside the container in ubiquitous environment. The information processing system using fuzzy logic and the InTouch, one of SCADA(Supervisory Control and Data Acquisition) systems, is implemented to monitor the inside of the container and predict the emergency state.
Fuzzy Generalized Topological Spaces
Min, Won-Keun ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 404~407
DOI : 10.5391/JKIIS.2009.19.3.404
In this paper, we introduce the concept of fuzzy generalized topologies which are generalizations of smooth topologies and Chang's fuzzy topologies and obtain some basic properties of their structure. Also we introduce and study the concepts of fuzzy generalized continuity and weakly fuzzy generalized continuity.
GPS/INS Data Fusion and Localization using Fuzzy Inference/UPF
Lee, So-Hee ; Yoon, Hee-Byung ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 408~414
DOI : 10.5391/JKIIS.2009.19.3.408
A GPS/INS system is widely used in the UGV to estimate position during the mission. However, there are few restrictions when a GPS/INS system used alone. For example, GPS provides precise location information but easily interrupted by external factors like weather, environment, etc. INS provides continuous location data but positioning errors grew very rapidly with time. Therefore, it is necessary to integrating multi-sensors for more continuous and correct position estimation. In this paper, we propose location estimation algorithm of the UGV for GPS/INS integrated system that combines Fuzzy Inference and Unscented Particle Filter(UPF) to improve navigation. Fuzzy inference provides the simplest method integrating GPS/INS and UPF is non-linear estimation filter well suited to the correction of errors. The performance of the proposed algorithm was tested to compare with other algorithms. the results show that the proposed algorithm is more accuracy in position estimation and ensures continuous position tracking.
Implementation of Intelligent Speech Recognition System according to CCTV Emergency Information
Cho, Young-Im ; Jang, Sung-Soon ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 415~420
DOI : 10.5391/JKIIS.2009.19.3.415
For the emergency detecting in general CCTV environment of our daily life, the monitoring by only images through CCTV information occurs some problems especially in cost as well as man power. Therefore, in this paper, for detecting emergency state dynamically through CCTV as well as resolving some problems, we propose our advanced speech recognition system. For the purpose of it, we adopt HMM(Hidden Markov Model) in our system to do a feature extraction. Also, we adopt Wiener filter technique for noise elimination in many information coming from on CCTV environment. In this paper, our system send only the emergency speech information to a manager to deal with emergency state effectively.
Fuzzy Semi-Weakly r-Semicontinuous Mappings
Min, Won-Keun ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 421~424
DOI : 10.5391/JKIIS.2009.19.3.421
In this paper, we introduce the concept of fuzzy semi-weakly r-semicontinuous mappings on a fuzzy topological space and study characterizations for such mappings. And we investigate the relationships among fuzzy r-semicontinuity, fuzzy semi-weakly r-semicontinuity and fuzzy weakly r-semicontinuity.
Interval-Valued Fuzzy Relations
Hur, Kur ; Lee, Jeong-Gon ; Choi, Jeong-Yeol ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 425~431
DOI : 10.5391/JKIIS.2009.19.3.425
By using the notion of interval-valued fuzzy relations, we forms the poset (IVFR (X),
) of interval-valued fuzzy relations on a given set X. In particular, we forms the subposet (IVFE (X),
) of interval-valued fuzzy equivalence relations on a given set X and prove that the poset (IVFE(X),
) is a complete lattice with the least element and greatest element.
Simple Bacteria Cooperative Optimization with Rank Replacement
Jung, Sung-Hoon ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 432~436
DOI : 10.5391/JKIIS.2009.19.3.432
We have developed a new optimization algorithm termed simple bacteria cooperative optimization (sBCO) based on bacteria behavior patterns . In , we have introduced the algorithm with basic operations and showed its feasibility with some function optimization problems. Since the sBCO was the first version with only basic operations, its performance was not so good. In this paper, we adopt a new operation, rank replacement, to the sBCO for improving its performance and compare its results to those of the simple genetic algorithm (sGA) which has been well known and widely used as an optimization algorithm. It was found from the experiments with four function optimization problems that the sBCO with rank replacement was superior to the sGA. This shows that our algorithm can be a good optimization algorithm.
Performance Evaluation of Dynamic Numbering Schemes on SQL
Hong, Dong-Kweon ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 437~443
DOI : 10.5391/JKIIS.2009.19.3.437
There has been many active researches on dynamic XML numbering scheme for efficient retrievals and updates of XML. There are two major approaches for dynamic numbering schemes. One approach is dependant on adjacent node numbers when they assign new number for newly inserted node. While the other approach is independent on adjacent node numbers. In this paper we explain the table schema and procedures for our experiments on an SQL host to compare the performance of the two approaches and shows W3C XQuery performance results of the two approaches on the SQL host.
High Performance Reflection Effect Processing for Moving Pictures in 3 Dimensional Graphics
Lee, Seung-Hee ; Lee, Keon-Myung ;
Journal of Korean Institute of Intelligent Systems, volume 19, issue 3, 2009, Pages 444~449
DOI : 10.5391/JKIIS.2009.19.3.444
With the advance of high performance computing hardware, many applications have been emerging which exploit real-time computer graphics capabilities. This paper is concerned with an effective realization method for reflection effect for the situations in which moving pictures are played in 3D computer graphics modeling world. The method determines in an geometric way the locations of the projection plan into which the playing areas of moving pictures are mapped, and then realizes the reflection effect with texture mapping. Compared with the traditional stencil buffer-based reflection method, the processing time of the proposed method does not significantly deteriorate for the models with moving pictures and reflection surfaces, and its throughput was improved by 30% at minimum and 127% at maximum for the models used in the comparative studies.