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In this paper, a novel metamaterial absorber is proposed. The absorber is based on metamaterial which is a kind of artificial periodic structures. The top layer of the absorber is composed of split ring resonators (SRRs) with a square metal patches (SMPs) in each SRR and its bottom layer is covered with whole metal. The special structure of the top layer makes the unit cell resonate at adjacent frequencies...
In response of the fact that traditional intrusion detection systems are not able to fulfill the requirements for specific network security, such as fast processing speed, stronger defense capability, and higher real-time performance, a model of network security defense is built on the integration of data stream mining and intrusion detection; and, a data stream clustering algorithm is designed for...
The aim of this Letter is to investigate the feasibility of isolated tracheal chondrocytes on a novel-type nanocomposite scaffold for application to cartilage regeneration. The scaffold was based on biocompatible N-carboxyethylchitosan containing hydroxyapatite nanoparticles (NCECS/ nHA). NCECS/nHA nanocomposite scaffold was fabricated by vacuum freeze-drying. Tracheal cartilage segments from a 8-week-old...
With an ever-greater increase in network bandwidth, network speed and network traffic, network attack techniques are constantly changing and improving, making it formidable for the traditional network security defense measures to keep pace with this challenge. In this paper, a theoretical analysis is made first of both the traditional intrusion detection and the data stream mining, and then, a research...
As a type of artificial intelligence model derived from the human brain system, the neural network has the function to simulate the human brain. The paper is intended to introduce the neural network into the measurements and calculations of space object orbits, thereby giving fuller play to its advantages in dealing with the non-linear issues, and thus making it possible to design the prediction algorithm...
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