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Uniform random network (URN) is perhaps the most basic and generic model of complex networks. In a URN, each node links to exactly k other nodes which are randomly chosen from the entire network with equal probability. With such a simple topology assumption, URN is suitable for modeling homogeneous wireless mesh networks. However, compared to inhomogeneous networks like small world or power-law network,...
As more and more grid applications are put into use, the performance information plays a more important role in evaluating the running status of the grid system. However, most existing monitoring tools only provide system-level performance data, which are often massive in storage and meanwhile contain either duplicate or missing, even erroneous raw data. In order to make the collected data more easily...
As is well known, an advanced knowledge and know-how of human are needed in the operation support work. Further, human expert can cope with the recent trend of machine dynamics. Usually, the diagnosis works have been privately performed in the brain of the individuals, and its information were not shared. Recently, the number of experts is decreasing and it becomes important to maintain and to extend...
In this paper, the main attention is focused on transient property of control input signal, we propose a novel model reference adaptive control scheme for time-continuous single-input single-output linear systems with input saturation. To improve a control performance, a novel estimator using an observer for the output tracking error signal is proposed. Using the estimator, it is shown theoretically...
A propulsion system that does not require any interaction with the external environment in the form of grasping or sticking is proposed. This internal propulsion system for a robot body operates by the use of the frictional force between the body and the environment, and the reaction force from the controlled acceleration of a mass. The dynamics and control issues of a rotating lever attached to a...
FRIT (fictitious reference iterative tuning) is attractive in the field of the control system design. Especially, the FRIT has some useful features in practical use. One is that it dose not require the system identification. Another is that the control parameters can be directly computed using only the closed-loop input/output data and the desired output signal. In this paper, the FRIT is extended...
This paper describes a design scheme of nonliner controller with an internal model control structure. The internal model is designed using the data-driven (DD) approach. The DD approach is effective in describing the nonliner components. Also, it is easy to construct the IMC system if the system model can be suitably designed. According to the proposed control system, the desirable control performance...
In this paper, the self-tuning PID control law based on generalized minimum variance control law is applied for DC-DC converter circuit. Control performance is ascertained self tuning law better than fixed parameter when system changed. In this instance, lambda, design parameter set from the start. But, challenges for the future can be able to handle auto-tuning of control weighting factor.
The safety operation of the plants in the chemical industry is very important. The authors proposed a concept called dynamic operation permission to support safety operation of nuclear power plants. The main idea of the dynamic operation permission is to prevent only evident commission errors and to leave operators behave as they like as far as they follow operation manuals and various operation rules...
The nonlinear PI parameter adjustment method by RBFN was considered in this research. When the decision of the parameter of the controlled object with a nonlinear characteristic changed the target value by doing by RBFN, an excellent result was obtained. The adjustment method of the intermediate value of the hidden layer of this RBFN is scheduled to be considered in the future.
One of the great challenges in Internet service fault management under noisy and uncertain environment lies in the difficulty of fault priori distribution acquisition. To address the problem, an active probing based approach is proposed for the Internet service in this paper. A hidden Markov model(HMM) based dynamic probabilistic dependency model is chosen to be the fault propagation model (FPM)....
Speech-recognition rates decrease in noisy environments. The body-conducted speech, conducted in solids such as body and skins, has a noise-robust characteristics and can be served for recognition systems even in 98 dBSPL (-20 dBSNR) noise environments. However, the body-conduction can not capture high frequency sounds. Conventional methods to improve sound quality of body-conducted speeches need...
Signal classification is an important subject for military radio communications. With the revolution of digitizing communications ever closer to the antenna, commercial cognitive radios with programmable modulation schemes and adaptive transmission rates have become a practical wireless communication platform. Signal classification techniques have attracted much attention recently by the cognitive...
This research develops interaction models among companies in IC supply chain to study the information integration among them. The main processes of IC supply chain are IC design, wafer fabrication, wafer probe, IC packaging/assembly, and final test. A workflow model between IC design houses and wafer fabrication plants is developed with focuses on purchase order, engineering data, and work-in-process...
Due to its robustness and computational efficiency, the mean shift based algorithms have achieved considerable success in object tracking. Color histogram is used in these algorithms to represent the target model. The Bhattacharyya coefficient is employed as the similarity measure to evaluate the difference between the model and the target candidates. In practice, there exist some limits in these...
Smart actuators, such as magnetorestrictive actuators, shape memory alloy (SMA) actuators, and piezoceramic actuators, generally exhibit symmetric and asymmetric hysteresis loops. In this paper, a generalized Prandtl-Ishlinskii model with an asymmetric play operator is utilized for describing asymmetric hysteresis nonlinearities in smart actuators. Furthermore, a corresponding inverse of the asymmetric...
In this paper, a low-cost extendable framework for embedded smart car security system is proposed, which consists of a face detection subsystem, a GPS (Global Positioning System) module, a GSM (Global System for Mobile Communications) module and a control platform. The face detection subsystem bases on optimized AdaBoost algorithm and can detect faces in cars during the period in which nobody should...
Position information is of vital importance in the various applications in wireless sensor networks (WSNs). We analyze the features of localization methods considering both precision and energy consumption and propose the idea of hybrid localization system (HLS). HLS is composed of coarse-grained localization system (CGLS) and fine-grained localization system (FGLS). CGLS takes the wireless signal...
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