Evaporation ducts have a significant impact on electromagnetic (EM) wave propagation. The accurate prediction of EM propagation loss (PL) is important for the practical application systems. However, random weather processes and interaction air-sea variables will cause complex spatial temporal fluctuations in PL, especially an over-the-horizon link. physics models show some limitations practice. This article proposes data-driven PL method based gated recurrent unit network (GRU-PL). An X-band...

Maritime high-speed over-the-horizon wireless communication is realizable through evaporation ducts. Detailed measurement, analysis, and modeling of duct channels are essential for application this technique. In paper, X-band electromagnetic (EM) wave propagation systems were developed deployed a 133-km microwave link in coastal areas the Yellow Sea. The length was 7.7 times line-of-sight length. Measurement results including path loss (PL) meteorological data obtained during 54-day period...

An evaporation duct, which often occurs in the air–sea boundary layer, has a considerable impact on remote sensing detection capability of electromagnetic (EM) systems. Tropical cyclones (TCs) substantially increase transfer water vapor and heat inevitably affect EM propagation environments; however, observations duct environments their effects during TC process have seldom been reported. In this article, X-band systems that can operate continuously environment were specially developed,...

In this paper, by allocating the limited subchannel resources based on interference alignment (IA) with clustering to mitigate severe co-tier in dense small cell networks (SCNs), we aim at maximizing number of data streams achieved all user equipments (SUEs) while guaranteeing stream requirement for each SUE. As corresponding optimization problem is NP-hard, propose a two-phases algorithm graph theory obtain suboptimal but efficient solution, which requires much lower complexity and notably...

The evaporation duct (ED) is generated by the of seawater and can be an influential factor electromagnetic (EM)-wave propagation. Rainfall also affects atmospheric factors EM-wave However, distribution ED path loss (PL) during rainfall has rarely been reported. This paper analyzes in South China Sea (SCS). results show that height (EDH) area generally lower. effect on over-the-horizon (OTH) propagation reaches 0.69 dB km−1 average, which 4.3 times stronger than maximum rain attenuation (0.16...

Abstract In the field of nanophotonics, manipulation light using high refractive index dielectric materials has garnered significant attention in recent years. This occurs because with a demonstrate lower losses comparison to metallic plasmonic materials. Furthermore, interference between internal toroidal dipole moment and electric leads destructive radiation field, resulting formation an anapole state localization energy near-field. this work, we initially excite silicon nanodisk periodic...

With apparent advantages of several GHz license-free spectra, low power consumption, low-cost implementation CMOS devices, and so forth, 60 wireless communication technology becomes the first choice for short-range high rate in future personal area network (WPAN) local (WLAN). While different from common WPAN system with omnidirectional communication, GHz-WPAN generally adopts directional communication. In this paper, a device (DEV) interconnected mechanism based on switched beamforming is...

Aiming at the complicated nonlinearities, high uncertainties and strong coupling of hypersonic vehicle, a new adaptive iterative learning control method is put forward. The proposed controller combined with sliding mode control. Firstly, nonlinear design model for attitude established according to motion equations vehicle. With regard class system, combination then applied model. Finally, Lyapunov-like function used prove boundedness all signals closed-loop system convergence tracking errors...

This paper investigates subchannel allocation based on clustered interference alignment in dense small cell networks when all user equipments (SUEs) have differentiated requirements for data streams. By imposing the condition that each cluster has a size not exceeding maximum value achieved SUE needs only one stream, we maximize number of SUEs with guaranteed streams, which is NP-hard. Hence, propose two-phase efficient solution much lower complexity and reduced feedback overhead. First,...

This article investigates efficient subchannel allocation based on the proposed partial clustered interference alignment (PCIA) and clusters merging algorithms in dense small cell networks (SCNs), which well adapts to randomly deployed SCNs can further improve achievable data streams. Specifically, we aim at maximizing streams achieved by all user equipments (SUEs) while satisfying requirement for of each SUE. Due NP-hardness corresponding problem, propose an solution consisting three...

As an emerging technology, intelligent reflecting surface (IRS) has attached attention of academia because it can customize a favorable wireless propagation environment. However, for the traditional passive structure, IRS merely alter phase incident signal, which limits maximum attainable beamforming gain. In order to give full play potential IRS, in this paper, we employ active is able and amplify amplitude signals simultaneously there exists additional power supply. So as improve...

The system structure, working principle and evaluation algorithm of a data acquisition for diesel locomotive combustion are introduced. condition in relation to the power, fuel consumption ,fuel pressure, turbocharging pressure outlet temperature. Through behavior characteristic value signals, we can finish nondisassemble examing evaluation. structure policy also discussed. achievement is applied proved by practice that viable effective. Compared with other diagnosis methods locomotive, it...

Successive Interference Cancellation (SIC) receiver is used to eliminate the co-channel interferences in non-orthogonal multiple access (NOMA) scenario. During SIC procedure, some physical layer parameters including user equipment's (UE's) modulation order are required decode and reconstruct interference signal. These kinds of would increase signaling overhead. To address this issue, paper provides a novel blind-detection algorithm with Density-Based Spatial Clustering Applications Noise...

research-article Calculation and Allocation Method of Carbon Flow in Power System Based on Distribution Share Authors: Hao Zhang State Grid Jiangsu Electric Co., Ltd, China ChinaSearch about this author , Yaming Ge Chaoyang Yan Yulin Zhao Shoukui Chaoqun Wang Zheda Technology (Hangzhou) Authors Info & Claims AIAM2021: 2021 3rd International Conference Artificial Intelligence Advanced ManufactureOctober Pages 168–171https://doi.org/10.1145/3495018.3495047Online:14 March 2022Publication...

60GHz communication is a promising technology for future multimedia applications in WPANs with its capability of supporting Giga-bit transmission short range. However, signal degrades significantly through obstacles. Therefore, collaborative preferred to solve the link blocking problem. Furthermore, utilization directional antenna, which aims offset severe path loss, allows more efficient space multiplexing. So scheduling algorithm needed take full advantage high multiplexing degree and...

To cope with climate change and other environmental problems, countries regions around the world have begun to pay attention development of renewable energy under drive achieving global carbon emission peak neutrality goal. The distributed photovoltaic (PV) power grid is an effective solution that can utilize solar resources provide clean a supply. However, continuous connection energy, it poses great challenges supply stability security grid. Therefore, particularly important promote local...