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.
Realistic panoramic image of its strong, deep, 360-degree panoramic view of the characteristics of convenience by the increasingly widespread concern for the real world to provide full 360 degree scene information, which has been widely applied in various fields. Panoramic three-dimensional measurement reconstruction needs to identify some feature matching. So the paper is focused on the research...
The ultraviolet-visible (UV-Vis) spectrometry system is increasingly employed in chemical oxygen demand (COD) predicting recently for its significant advantages compared with traditional standard chemical method. In this study, an investigation is undertaken to determine whether the physic-chemical parameters of samples provide a good compensation for prediction. Meanwhile, a feature selecting algorithm...
This paper presents an estimation method of ship oscillation subject to ship speed variation, which leads to oscillation frequency variation. Such variation will deteriorate the estimation performance particularly when relying on a model-based estimation algorithm such as the Kalman filter. To overcome the problem, we propose an estimation method of ship oscillation with a low-cost gyro rate sensor,...
The measurement of bending angle is important for high precision bending machine. In order to detect the real time bending angle of the bending workpiece, a non-contact angle measurement system was developed, which combined binocular cameras and linear laser. In this study, the system was designed based on the laser triangulation. By analyzing the images acquired from the binocular cameras, the geometrical...
This paper is concerned with the non-fragile H∞ filtering for a class of discrete-time networked systems with multiple communication delays. We model such a complex delay system as a switched system. For the filtering implementation uncertainty, a stochastic variable is employed to describe the phenomenon of the randomly occurring filter gain change, and a norm bound is used to measure the change...
In order to achieve an accurate location of unknown nodes in complex three-dimensional wireless sensor networks, in this paper, a new localization algorithm based on anchor optimization is presented. Resorting to virtual force theory, it redeploys the anchor nodes deployed randomly within a certain area to engender a good coverage state, and then uses the DV-Hop algorithm to locate the unknown nodes...
This paper proposes a compensated robust Kalman filter to reduce estimation error of a practical system. The practical system is assumed to have system uncertainty and affected by external disturbance and noise. Proposed Kalman filter has a compensation input, which reduces discrepancy between error dynamics of the reference system model and that of the practical system. The compensation term is calculated...
This paper proposes a cooperative control scheme to achieve lateral balance of a biped robot in the coronal plane, tested under disturbing conditions such as changes in the floor inclination and external forces applied to the body. The control system is composed of one master controller in charge of commanding the legs servomotors and two proportional Fuzzy controllers, one for each foot, which compute...
In this paper, the embedded based fuzzy controller is implemented and applied for a car-like mobile robot (CLMR). We present the design and implementation of a fuzzy controller by using a microcontroller. The fuzzy controller utilizes a look-up table to realize fuzzy logic algorithm. The controller of the CLMR receives the information from the IR sensor via two analog-digital converters and a control...
Shared control which combines automatic control of robot with operator's direct control can greatly improve the operation ability of teleoperation system. This paper proposes a new shared control mode based on the supervisory theory of Fuzzy Discrete Event System (FDES). The developed supervisory mode is used for the transition between direct control mode and automatic control mode to reduce misoperation...
Increase in common carotid arterial stiffness is a risk factor for cardio- and cerebrovascular diseases. It has been reported that resistance training (RT) may increase or decrease the arterial stiffness. In this paper, acute impacts of upper and/or lower limb RT on common carotid arterial stiffness and local hemodynamics were investigated. Twenty two healthy subjects were randomly assigned to upper...
The driver's head pose plays a very important role in risk prediction of vehicle driving. Head pose affects the driver's ability to observe the driving environment, and determines the safety in the process of driving. This paper proposes an efficient representation and feature extraction technique for head pose estimation of the driver. This method 1firstly applies SIFT algorithm to extracting the...
The random noise is an important factor that affects the precision of MEMS gyroscope. Analyzed the noise characteristic of gyroscope by using Allan variance, introduced the thought of wavelet threshold de-noising method, and presented an improved wavelet threshold quantization function. Expatriate the complete build process of wavelet threshold denoising scheme and examined the effectiveness and repeatability...
Various cis-regulatory module (CRM) predictors have been proposed in the last decade. Several well-established CRM predictors adopted different categories of prediction strategies, including window clustering, probabilistic modeling and phylogenetic footprinting. Appropriate integration of them has a potential to achieve high quality CRM prediction. This study analyzed four existing CRM predictors...
Pendulum-like behavior of the helicopter is an effect occurs in the case where the movement of the body of the helicopter lags with respect to its rotors, leading to undesired oscillations when the helicopter is required to hover at desired positions. In this paper, an online learning based controller is designed to dampen the oscillation by coupling a two layers forward neural network with a classical...
Magnetometer is the main instrument to determine the attitude of micro satellite. Magnetometer accuracy is an important indicator which influences the micro satellite attitude performance. In order to improve magnet estimation accuracy, in-orbit calibration based on multi-parameter is utilized in two stages to estimate the error of Magnetometer`s bias and scale factor. The results can be used to compensate...
The potential of the genetic clock is in its role to trigger consecutive logic reactions in sequential biological circuits. However, it is hard to directly create a square wave generator in the gene regulatory systems for use as a genetic clock. This research studies the design of a genetic clock generator based on combination of a genetic oscillator with a toggle switch via a dual repressor. This...
Mars airplane completes the complicated tasks under the martian enviroment where there are not the necessary ground equipments to navigate and control. As a result, designing the adaptive control law is critical for Mars airplane to achieve the anticipated goals. This paper presents an adpative control law based on the guardian maps theory for Mars airplane. First, the longitudinal model of Mars airplane...
With further developments of Uninhabited Combat Aerial Vehicles (UCAVs), the problem of multiple UCAVs mission assignment is a hot point, and many solutions aimed at multiple UCAVs mission assignment are proposed in the past years. However, it's still difficult to satisfy the actual need of complicated battlefield owing to the larger scale of problems and the limit of operation speed. In this paper,...
For the coordination of multi-agent systems with bandwidth limited digital channels, if there are unmeasurable states in agents' dynamics, then the integrative design of encoding-decoding and control schemes is required for the cooperative stabilization of the whole system. In this paper, the cooperative stabilization for linear discrete-time multi-agent systems is investigated with unmeasurable states...
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.