The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
To get the accuracy of Wireless Sensor Networkboundary node localization and decrease error, this paperpresent an arithmetic on RSSI (Received Signal StrengthIndicator) weighting circulate localization. This arithmetic isbased on RSSI, combination of least squares estimate localizationalgorithm and weighted centroid circulation method. Thealgorithm firstly is introduced into threshold method forscreening...
In this note, we are concerned with the boundary stabilization of a one-dimensional heat equation with the external disturbance flowing to the control end. The nonlinear uncertainty is estimated in terms of the output, and then canceled by its estimates. We show that this strategy is valid when the derivative of the disturbance is also bounded. The numerical simulation validates the effectiveness...
In this paper, we are concerned with the boundary feedback stabilization of a cascade system of ODE-PDE with the external disturbance flowing the control end, where the PDE is described by a heat equation with Dirichlet interconnection. We use the sliding mode control (SMC) to deal with the disturbance. By the SMC approach, the disturbance is supposed to be bounded only. The existence and uniqueness...
We propose a procedure for the synthesis of control protocols for systems governed by nonlinear differential equations and constrained by temporal logic specifications. This procedure relies on a particular finite-state abstraction of the underlying continuous dynamics and a discrete representation of the external environmental signals. A two-player game formulation provides computationally efficient...
This paper introduces a new opinion model using space-time elements. It proposes the concept of an Opinion Importance Factor which is composed of a Time Importance Factor and a Source Importance Factor. Based on that, it analyzes the characteristics of the Time Importance Factor in different applications and divides the Source Importance Factor into two parts, the influence of source and the relatedness...
Instability phenomena occurred in aeroengines are certainly very undesirable. The unstable flow not only causes a drastic reduction in the performance of the compressor but also can damage to engine's components during operations. Thus it is necessary and critical to employ various feedback control mechanism to stabilize the system. Current all proposed feedback controllers in literature require the...
In lithography process, wafers need to be baked on the hot plate. There are very high requirement to the temperature uniformity of hot plate surface. To the problem of choosing design parameters, the orthogonal experimental design method was used, the simulation software ANSYS was applied, the design parameters on the various conditions were analyzed, Then a regression model was obtained based these...
In this paper, the effects of random road surface roughness and vehicular speed, lane position on the impact effect due to moving vehicles are investigated. For simplicity, the bridge and moving vehicles are simulated as two separate elastic structures. Two sets of equations of motion can be written with the adoption of virtual work principle and finite element method. The displacement equation and...
Due to the introduction of the Internet, enabling the network control system to introduce a delay. Mainly aiming at the fixed delay and the stability of system, this article puts forward the generalized predictive control (GPC) algorithm, and establish a prediction model on the basis of using the ideas of fuzzy control to solve the delay of the network control system. Finally, apply the truetime simulation...
This paper focuses on a new approach for the calibration of IMU misalignment angles. Firstly the rigorous mathematic model of IMU misalignment describing the relationship among IMU output angles, misalignments and exterior orientation angular elements is discussed, then one-step and two-step these two fundamental calibration methods are introduced. According to the idea of two-step calibration a rigorous...
A special simulation model for the surge responses of ZnO varistors is introduced in this paper. This model is based on the Voronoi network and contains the actual conduction mechanism of the grain boundaries, as well as the capacitances of the grain boundaries. The surge responses of the actual varistor samples were simulated and compared with the experimental results. The simulated waveforms agree...
Attitude matrix is the foundation of strap down inertial navigation system (SINS). Equivalent rotation vector algorithm (ERVA) is now considered as the most effective method of computing the attitude matrix under the high-frequency dynamic environment. Most of the existing ERVA pay more attention to the method of optimizing the algorithm's coefficients, which are aimed at the variant sample number...
In this paper, we consider the blow-up properties of the positive solutions to a porous medium equation u = Δum + c(x, t)up for (x, t) ∈ Ω × (0, ∞) with nonlinear nonlocal boundary condition u|∂Ω × (0, ∞) = ∫Ωf(x, y, t) ut dy and nonnegative initial data where p > 0 and l > 0. We prove global existence theorem and the solutions blow up in a finite time for sufficiently large or for all nontrivial...
This paper presents an approximate analytical method for the performance evaluation of a production line with multiple failure modes and unreliable buffer. A solution to a class of problems where a discrete material manufacturing system consisting of two machines that is subject to breakdown with multiple failure modes and one unreliable buffer was presented. This paper considers the machines with...
Solder delamination is one of the main failure modes of IGBT module. When the severity of the failure mode is different, the temperature character of IGBT is also different. This paper presents a methodology based on 3D thermal-electro coupling finite elements modeling intended to analyze the relation between the failure degree and the temperature, The results suggest when the area of solder delamination...
In this paper, a review of man-made object detection algorithms is presented based on various fractal features which are derived from the blanket covering method. These fractal features include fractal dimension (D), fractal model fitting error (FE), D-dimension area (K), multi-scale fractal feature related with D (MFFD), and multi-scale fractal feature related with K (MFFK). To choose the optimal...
A new man-made target tracking algorithm integrating features from (Forward Looking InfraRed) image sequence is presented based on particle filter. Firstly, a multi-scale fractal feature is used to enhance targets in FLIR images. Secondly, the gray space feature is defined by Bhattacharyya distance between intensity histograms of the reference target and a sample target from MFF (Multi-scale Fractal...
The paper introduces the random factor in Particle Swarm Optimization. Comparing with inertia weight, the particle's velocity is determined by previous velocity, own experience, public knowledge and random behavior. The random operator is similar with the mutation operator in the Genetic Algorithms. Simulation results show that the method introducing the random factor is better than inertia weight...
It is a hot topic that an extended Kalman filter (EKF) is used as speed and position observer in sensorless control of permanent magnet synchronous motor (PMSM). However, the choice of the EKF covariance matrices is still an unsolved problem as the EKF is applied in sensorless drives. In this paper, the parameters of the covariance matrices are tuned based on ant colony algorithm (ACA). The simulation...
In this paper, rats were trained to press a lever over a threshold to get water as rewards, and neural ensemble activities in primary motor cortex (MI) and pressure signal of the lever were recorded synchronously. Meanwhile, two algorithms, Kalman filter (KF) and Optimal Linear Estimation (OLE), were used to decode neural ensemble activities around the pressing events. After training, the pressure...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.