This paper investigates the stochastic stability problem of genetic regulatory networks (GRNs) with multiple time-varying delays. Most of the results on the stability of GRNs with delays are based on a model in which ...
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This paper investigates the stochastic stability problem of genetic regulatory networks (GRNs) with multiple time-varying delays. Most of the results on the stability of GRNs with delays are based on a model in which the delays of the transcription and translation processes for each gene product take the same value. In this paper, we generalized the model to a differential equation with multiple time-varying delays. Sufficient conditions for the stochastic stability of the GRNs with stochastic noise are obtained. Finally, a simulation example is given to show the effectiveness of the proposed results.
Fractional order (FO) filters have been investigated in this paper, with band-pass (BP) and band-stop (BS) characteristics, which can not be achieved with conventional integer order filters with orders lesser then two...
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ISBN:
(纸本)9781467356930
Fractional order (FO) filters have been investigated in this paper, with band-pass (BP) and band-stop (BS) characteristics, which can not be achieved with conventional integer order filters with orders lesser then two. The quality factors for symmetric and asymmetric magnitude response have been optimized using real coded Genetic Algorithm (GA) for a user specified center frequency. Parametric influence of the FO filters on the magnitude response is also illustrated with credible numerical simulations.
One of the major difficulties with an autonomous reverse parallel parking is how to find a trajectory of travel from start to goal without any collision. In this paper, a bidirectional search is suggested to find the ...
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In general, optimal design for the mechanism such as Gough-Stewart Platform (GSP) does not take into account practical factors of the mechanism such as its component weight and size, and mechanical interferences among...
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This paper presents a method for automatic segmentation of blood vessels in retinal images. The method is based on vessel tracking technique. The key idea of the method is that first a set of seed points (center of ve...
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ISBN:
(纸本)9784901122115
This paper presents a method for automatic segmentation of blood vessels in retinal images. The method is based on vessel tracking technique. The key idea of the method is that first a set of seed points (center of vessel cross sections) is extracted. Then, the seed points are connected to establish the vessel skeleton. Finally, the false vessel point are rejected by resorting to a hypothesis-verificaton based procedure. The major contribution of this work is that we formulate the step of seed point connection in the form of graph-theoretical shortest path problem. Then we apply the Dijkstra's algorithm to solve the problem. The performance of our method evaluated on the publicly available DRIVE database shows promising results.
In the disk drive industry, head gimbal assemblies (HGAs) may be individually tested prior installation in a disk drive. While performing a test, a false negative result may be created because of external air turbulen...
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In the disk drive industry, head gimbal assemblies (HGAs) may be individually tested prior installation in a disk drive. While performing a test, a false negative result may be created because of external air turbulence caused by the rotation of the test disk. The objective of this paper is to find a model of the servo system in HGA testing system so that we know how to adjust the command to get rid of the effect of disturbance. The technique so called Transfer Function Determination Code (TFDC) is proposed to model the system in the frequency domain. In addition, Particle Swarm Optimization (PSO) is used to adjust the weights in TFDC algorithm in each frequency. The simulation results show a comparison of different inertia weight adjustments for the models.
This paper presents a new pipeline inspection robot that has multiple sensors for inspection of 80-100mm pipelines. The special feature of this robot is realization of driving and steering capability by using only two...
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This paper presents a new pipeline inspection robot that has multiple sensors for inspection of 80-100mm pipelines. The special feature of this robot is realization of driving and steering capability by using only two wheel chains. Compared to popularly employed pipeline robots using three wheel chains, the new design allows simple robot control and easy user interface, specially at T-branch. As another advantage, the flat shape of this robot allows mounting additional sensors on the both sides of the robot. The kinematics and three control modes are described. Finally, the performance of this robot system is verified by experimentation.
One of the major difficulties with an autonomous reverse parallel parking is how to find a trajectory of travel from start to goal without any collision. In this paper, a bidirectional search is suggested to find the ...
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One of the major difficulties with an autonomous reverse parallel parking is how to find a trajectory of travel from start to goal without any collision. In this paper, a bidirectional search is suggested to find the shortest pathway from an initial vertex to a goal vertex in a directed graph, implying that the initial and goal states must be known in advance. In each step for searching, there are three possible nodes generated from the configuration space (or C-space), that the algorithm must decide to traverse to based on a best first search algorithm. Giving a start and goal points, the designed path is obtained by simulation in MATLAB. The experimental results show an ability to perform a parking maneuver using the simulated path.
This paper proposes the novel emotion dynamic equation for emotion implementation like human's emotion. Almost general method use artificial approach such as neutral networks to classify emotion by using speech an...
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This paper proposes the novel emotion dynamic equation for emotion implementation like human's emotion. Almost general method use artificial approach such as neutral networks to classify emotion by using speech and face image data for human's emotion recognition. But high-dimension and large size of this data cause low-speed learning in robot system. The main idea of the proposed dynamic equation method is to dynamically express emotion by multi-agent function.
In general, optimal design for the mechanism such as Gough-Stewart Platform (GSP) does not take into account practical factors of the mechanism such as its component weight and size, and mechanical interferences among...
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In general, optimal design for the mechanism such as Gough-Stewart Platform (GSP) does not take into account practical factors of the mechanism such as its component weight and size, and mechanical interferences among them, etc. Particularly, in designing a robot module for micro-surgical operations which would be mounted at the end of a macro manipulator, its light weight, compactness, as well as good kinematic performance are important design aspects that should be considered. In this paper, design of a compact GSP module incorporating additional practical design factors such as mechanical interferences among mechanism components is discussed. A modified design for micro-surgical operations which requires a small operation region represented as a nominal operation point is suggested and it is shown that its performance exceeds one of the typical GSP design under the given practical component limitations such as actual length of active prismatic joints.
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