In order to solve the problem that the high computational burden of the multiple signal classification algorithm of non-circular signal (NC-MUSIC) in direction-of-arrival (DOA) estimation,a novel computationally efficient DOA estimation algorithm based on subspace rotation technique was proposed.Firstly,the partitioning of noise subspace matrix and
Light pollution is wreaking havoc on a global scale, which affects the environment, the rhythms of living things, and even our health and safety.In order to calculate the light pollution level in different regions, the entropy weight method was used to calculate the weight of light pollution evaluation indicators of eight cities of four types.Then,
Humor has been used as a tool against oppression for a long time.With the advent of digital technology, memes have a become popular object in social media, especially in Twitter platform.Meme is an images which are communicated through social media that make fun of bring to light a social or cultural issue.This research aims to explore a meme by AR
Abstract Physics informed neural network (PINN) demonstrates powerful capabilities in solving forward and inverse problems of nonlinear partial differential equations (NLPDEs) through combining data-driven and physical constraints.In this paper, two PINN methods that adopt tanh and sine as activation functions, respectively, are used to study data-