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We demonstrate experimentally spontaneous chirality in a whispering-gallery microresonator. Above an input threshold, the intensities of clockwise and counterclockwise propagating waves grow unbalanced, due to the Kerr-nonlinearity-modulated coupling between the counter-propagating waves.
Weighting matrices of most standard LQR controllers are determined by the designers according to their experience, and that usually makes controllers unable to achieve global optimum. To deal with this problem, a method of determining weighting matrices by acceleration based particle swarm optimization (APSO) was proposed. A six degree of freedom (DOF) half car model with “seat and human” system was...
Bioelectrical impedance technology is considered to be a noninvasive method of measuring heart function. Feature points extraction of impedance cardiography (ICG) signal is vital to cardiovascular disease diagnosis, and feature points extraction has curative value after operation. In this paper, the new algorithm combined with the wavelet technology to extract feature points accurately. Feature points...
With the development of information technology, the electric power system has gradually entered a new stage. And the security problem of electric power system has become an important research filed. In this paper, we applied wavelet technology and digital watermarking algorithm to improve the security level of the electric power system. This two technologies can complete sensitive information hidden...
Spontaneous chiral symmetry breaking is a ubiquitous property in nature and diverse fields of modern physics. However, such symmetry breaking has been elusive experimentally in the optical systems, which usually demands multiple identical subsystems [1]. As a prominent photonic device, the ultrahigh-Q whispering-gallery mode (WGM) microresonator supports clockwise (CW) and counterclockwise (CCW) propagating...
In order to improve the lying patient's ride quality, a 2-Dimensional ambulance-stretcher-lying body system model was established, and the optimal controller was designed for the stretcher. Considering ride comfort and driving stability, eight performance indexes were selected. Weighting matrices of standard LQR controllers cannot achieve global optimum. A method of determining the weighting coefficient...
This paper focuses on power management strategy for a hybrid system involving the Fuel Cell (FC) as the main power source and the Supercapacitors (SCs) as the auxiliary power source. An innovative Passivity-based Control (PBC) strategy with multi-equilibrium states is proposed. The hybrid system is modeled as a Port-controlled Hamiltonian (PCH) system and then the operating modes and the corresponding...
The purpose of this paper is to find the relationship between coal metamorphic and adsorption of Carbon Monoxide(CO) and reveal the source of CO in mines. Through preparation and industrial analysis of coal samples, mercury injection experiment and analysis of different metamorphic grade coal samples, to analysis the impaction on coal metamorphic grade of CO adsorption. Research shows with the increase...
This paper is concerned with the problem of resilient control strategy for cyber-physical system(CPS) under denial-of-service(DoS) attacks. The combined design between cyber layer and physical layer of CPS is proposed. On the one hand, the cyber mixed strategy is designed by using the physical performance H∞ index; on the other hand, the controller of physical system is designed by optimal cyber mixed...
Tujia brocade (Xi lan ka pu) is a kind of traditional handcraft brocade which was listed in the first batch of non-material cultural heritage of China. It has become a popular trend to promote non-material cultural heritage with digital technology. Personalization recommendation for Tujia brocade culture resources could push new knowledge and something the user interested in, which could improve the...
This paper presents a visual servo control approach based on homography for the leader-follower platooning system which consists of two wheeled robots. The proposed approach only requires the image taken under the ideal position with respect to the leader and corresponding distance to the plane pattern attach to leader robot. A virtual robot can be generated according to the homography and leader...
To research the optimal decision problems of closed-loop supply chain composed of a dominant retailer and a manufacturer with fairness concerns. Under two different recycling channels of manufacturer and retailer, the effect of manufacturer's fairness concerns to the pricing of new products and the recycling rate of waste products were analyzed, the profits of members and whole closed-supply chain...
This paper introduces a recursive Bayesian approach to identifying the phase connection of a single-phase load in unbalanced distribution systems. This method operates through comparing the measurement errors in distribution system state estimation (DSSE) of different models in the model bank, which contains all possible modes of phase connection. As a first step, numerical study based on IEEE 13-node...
Video streaming over HTTP is becoming the de facto dominating paradigm for today's video applications. HTTP as an over-the-top (OTT) protocol has been leveraged for quality video traversal over the Internet. High user-received quality-of-experience (QoE) is driven not only by the new technology, but also by a wide range of user demands. Given the limitation of a traditional TCP/IP network for supporting...
Decisions must be made regarding screening and treatment strategies under budget constraints for chronic hepatitis C birth-cohorts in the U.S. A Markov model of disease progression is able to evaluate health utility gain using quality-adjusted life years (QALYs) for each strategy. Through conducting a simulation optimization algorithm, Probabilistic Branch and Bound (PBnB), we not only provide an...
Impedance cardiogram signal is an important parameter of cardiac function evaluation. And impedance cardiogram signal can be used to reflect the health of human body. The diagnosis of cardiovascular disease has been the important research significance and clinical value. Due to the external environment changes, the signal is vulnerable to noises, such as baseline drift, power frequency interference...
This paper introduced the personalized recommendation technology to the news system. Especially, in order to meet the demand of the users' personality and ease the problem of data sparse, the research work proposed the hybrid collaborative filtering algorithm based on news recommendation. By improving correlation coefficient formula via adding news hot parameter when calculating the similarity of...
This paper proposed an impact analysis framework of three-dimensional indoor location technology based on RSSI. The impact analysis model is set to compare the location precision under different types of noise. The result illustrate that the designed impact analysis tool achieves the perfect three-dimensional indoor location results combined cost, location accuracy with filter. To reduce the impact...
This paper proposed a newly designed model to satisfy the growing demand of three-dimensional indoor positioning services. The existing different positioning services cannot meet the demand in our daily life, and the increasingly need of three-dimensional positioning services has attracted more attention. In this paper, we implement our analysis and research via studying the evaluation results of...
This paper proposed a solution to the three-dimensional indoor positioning system based on location fingerprint method. Especially, it proposed an automatic offl-ine collection method and realizes an off-line collection system, including a collection server and a mobile collection application, which can be used to collection the information of location fingerprint conveniently, and also improve the...
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