Papers by Keyword: Robust

Abstract: Mobile Health (mHealth) refers to any medical and public health practice aided by smart phones, tablets, or any mobile device. These devices are able to move about which allows communication anytime, anywhere. M-health is considered as the next step beyond the E-health systems. In recent times, M-health has become a new normal that has come to stay, despite the gradual reduction in COVID 19 cases worldwide that was believed to prompts most organization to go online. Software Developers have been on their toes trying to develop applications that can run effectively and remotely to deliver all healthcare services via mobile devices. This paper intends to develop a robust Mobile App using Zoho Creator that can effectively be bundled on any platform (Android, IOS etc) to meet the needs of patients anytime, everywhere. The application is rich with embedded platform and privileges for Doctors, Pharmacist, Lab scientist, Nurses, Medical record officers and patients. The interfaces are developed in a way that is attractive, easy to use, and optimized to meet the user’s needs. The app also takes care of selfservice facilities like Blood Pressure( BP) test, temperature test, heartbeat and some basic first aid and public health information tips for daily use.

Abstract: A kind of self-scheduled and robust control algorithm for the conversion mode of tilt rotor aircraft is proposed in this paper. The mathematical model of the aircraft is established by modeling each component and combining. Then the conversion corridor is obtained by trim results. The convex combination of several vertex system combined with two-dimensional interpolation is designed to solve the problem of self-scheduled while nacelle tilting. Last sufficient and necessary conditions for the existence of the state-feedback controller are given and a MATLAB tool is raised to ensure performance of the system.

Abstract: This paper proposes the design of a robust nonlinear optimal controller to move the underwater vehicle in the depth channel using gradient descent method. A nonlinear model with six degrees of freedom (6-DOF) has been extracted for the underwater vehicle. To selection of the model and design of controller, conventional assumptions used for other controllers have not been considered and the developed controller can be implemented via at least assumptions. In presented control method, systematic step selection for solving of the algorithm has increased the rate of convergence significantly. The performances of the proposed robust controller for moving in depth channel with considering of parametric uncertainty for the model have been confirmed via some simulations. The results show the desirable performance of developed controller.

Abstract: For the linear discrete time multisensor system with uncertain model parameters and measurement noise variances, the centralized fusion robust steady-state Kalman filter is presented by a new approach of compensating the parameter uncertainties by a fictitious noise. Based on the Lyapunov equation, it is proved that for given fictitious noise variance, the variances of the actual filtering errors have a less-conservative upper bound when the uncertainty of parameters is limited in a sufficiently small region which is called as robust region of the parameter uncertainties. Further, a simulation example demonstrates how to search the robust region. It is also proved that the robust accuracy of the centralized fusion robust steady-state Kalman filter is higher than that of each local robust Kalman filter. A simulation example shows its effectiveness.

Abstract: The Random Sample Consensus (RANSAC) algorithm is a popular tool for robust estimation problems in computer vision, primarily due to its ability to tolerate a tremendous fraction of outliers. In this paper, we propose an approach for optimizing the preview model parameters evaluation of RANSAC that has the benefit of offering fast and accurate RANSAC. With guaranteeing the same confidence of the solution as RANSAC, a very large number of erroneous model parameters obtained from the contaminated samples are discarded in the preview evaluation selection. And use local optimization step apply to selected models. The combination of these two strategies results in a robust estimation procedure that provides a significant speed and accuracy RANSAC techniques, while requiring no prior information to guide the sampling process.

Abstract: With the rapid development of communication technology and Internet technology, as well as the popularization of computer, the application of digital multimedia technology is more and more widely, video, voice and image gathering, editing, storage, and dissemination of digital information has become more and more convenient. However, it is because of the computer and the network popularization and the fragility of the digital information itself, digital multimedia data are more vulnerable to attack, digital products is also very easy to forged and tampered with. According to these digital multimedia data more easily by illegal processing problem, people put forward the concept of digital watermark. Digital watermark technology is used to realize the protection of digital information. In this paper, the digital watermark technology research starting from the practical application, the digital image watermark based on DCT domain is studied.

Abstract: Education development is the product of endogenous socio-economic; studying on regional differences of education level plays an important role in social and economic development. This paper constructs regional education development index system based on two aspects of basic educational facilities and educational scale, applies robust principal component analysis method to explore education development level differences of China's 31 provinces, and with the traditional principal component analysis for comparison. Research shows that, results obtained by robust principal component analysis is more in line with China's actual situation; the overall level of education is not high and the difference between regions is large; China's basic education is positively correlated with regional economy, while inversely correlated with regional population.

Abstract: This paper introduces a robust high-gain observer based state of charge (SOC) estimator for lithium-ion batteries of automated guided vehicles (AGV) . The proposed observer scheme enhances the transient response speed and diminishes the effect of uncertainties. Furthermore, it overcomes the perturbation problem, which is caused by high gains since the proposed observer scheme adopts sliding mode control technique. In order to verify the effectiveness of the propose method, the linear RC battery model in ADVISOR is used.

Abstract: Based on the uncertainty of covariant matrix and value of expected return in risk assets, constraint tracking error for investment portfolio optimization model of VaR in additional transaction costs is constructed in this paper. The validity is proved by using the method of linear matrix inequality. According to empirical analysis, the results of different investment models are analyzed and compared with the one gotten by the method in this paper. It is concluded that the distribution of weights of the model in this paper is more reasonable and its final return is better than other models. Moreover, it may be closer to the modern financial markets for its transaction cost.

Abstract: In this paper, the problem of vehicle yaw control using differential braking is investigated. The proposed control structure employs the wheel slip controller to apply differential braking to generate the yaw moment calculated by the yaw controller. A fuzzy logic based target slip allocation method is also designed. Due to system uncertainties and wide range operation conditions, two different yaw controller which are based on sliding-mode control and PID control are designed, and their performances are compared by hardware in loop simulation. The obtained results show the effectiveness of the proposed control structure with both yaw controllers, but the sliding mode based yaw controller can be more robust.