In this paper, we propose an adaptive semantic resource allocation paradigm with semantic-bit quantization (SBQ) compatible existing wireless communications, where the inaccurate environment perception introduced by additional mapping relationship between metrics and transmission is solved. Specifically, SBQ a hybrid uniform-non-uniform method, which aims to facilitate coding semantics bits. order investigate performance of communication networks, quality service for (SC-QoS), including...

Secure communications are of paramount importance in spectrum sharing networks due to the allocation and characteristics resources. To further explore potential intelligent reflective surfaces (IRSs) enhancing secure transmission performance, a multiple reflection surface (multi-IRS)-assisted sensing-enhanced wideband network is investigated by considering physical layer security techniques. An resource scheme based on double deep Q (D3QN) algorithm soft Actor-Critic (SAC) proposed maximize...

Spectrum sharing technology has been widely used for better spectrum efficiency. However, the interference issue between primary and secondary networks poses a significant concern. Semantic communication, being pivotal sixth-generation (6G) wireless exhibits remarkable robustness even under conditions of low signal-to-noise ratio (SNR). In this paper, intelligent resource allocation unmanned aerial vehicle (UAV)-enabled semantic communication with OFDM is investigated, where UAVs provide...

In this paper, we jointly design the power control and position dispatch for Multi-Unmanned Aerial Vehicle (UAV)-enabled communication in Device-to-Device (D2D) networks. Our objective is to maximize total transmission rate of Downlink Users (DUs). Meanwhile, Quality Service (QoS) all D2D users must be satisfied. We comprehensively considered interference among communications downlink transmissions. The original problem strongly non-convex, which requires high computational complexity...

Cognitive radio networks (CRNs) have demonstrated great benefits in improving spectrum efficiency. However, due to the exploitative character of wireless access, CRNs confront serious security issues. In this paper, intelligent reflection surface (IRS)-assisted secure communication cognitive are investigated, where IRS is exploited enhance and improve To maximize secrecy rate secondary network, subchannel assignment, coefficients IRS, transmit beamforming base station (SBS) sensing time...

In response to the issue of short-term fluctuations in photovoltaic (PV) output due cloud movement, this paper proposes a method for forecasting PV based on Depthwise Separable Convolution Visual Geometry Group (DSCVGG) and Deep Gate Recurrent Neural Network (DGN). Initially, motion prediction model is constructed using DSCVGG, which achieves edge recognition clouds by replacing previous convolution layer pooling VGG with depthwise separable convolution. Subsequently, results DSCVGG network,...

This paper presents a novel algorithm and architecture design for 18-band quasi-class-2 ANSI S1.11 1/3 octave filterbank. The proposed has several advantages such as lower group delay, computational complexity, matching error. technique we developed in this can be summarized follows: 1) simple low-pass filter (LPF) discrete cosine transform (DCT) modulation are utilized to generate uniform 9-band filterbank first, then all elements of z <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

The traditional least squares estimation and advanced methods usually make asynchronous measurement to the harmonic signals, then solve a giant over-determined linear equations with real variables. But these have some defects of low estimated accuracy, tremendous calculation quantity expensive measure cost. paper develops state method based on PMU (phasor unit), solves ill-conditioned system complex variables in way singular value decomposition (CSVD). formulation shows that proposed...

Microstructure evolution of AZ80 magnesium alloy under isothermal condition is researched by experiment. Effect law heating temperature and holding time on grain size for researched. With increasing with rising temperature, the increases obviously. According to test data, growth model established based Seller's model, activation energy determined, Q=85900J/mol. The calculation results are in good agreement that experiment, relative errors between experiment less than 15.6%.

Learning-task oriented semantic communication is pivotal in optimizing transmission efficiency by extracting and conveying essential semantics tailored to specific tasks, such as image reconstruction classification. Nevertheless, the challenge of eavesdropping poses a formidable threat privacy due open nature wireless communications. In this paper, intelligent reflective surface (IRS)-enhanced secure (IRS-SSC) proposed guarantee physical layer security from task-oriented perspective....

Microstructure evolution of AZ31 magnesium alloy in annealing process had been investigated by experiment study at heating temperature range 150°C–450°C and holding time 15 min–60 min. The effects on grain growth analyzed. results presented that the size tends to grow up with increase a certain temperature. At time, increased firstly then decreased 150–250°C. And when is higher than 250°C, grows gradually model Mg has established regression based experimental data 250–450°C, relative error...

Abstract Reconfigurable intelligent surface (RIS) is an emerging technology to improve the spectral efficiency of wireless communication systems. However, high complexity beam design and non-negligible overhead associated with RIS limit number elements that can be deployed in practice. In this paper, we investigate downlink communications irregularly reflecting surfaces assist non-orthogonal multiple access (NOMA) To address challenge, propose a novel four-step resource allocation algorithm....

In this paper, an unmanned aerial vehicle (UAV)-assisted semantic communication system is proposed to enhance data gathering and transmission efficiency for wireless communication. The consists of a base station (BS) UAV, collaborating collect transmit data. UAV equipped with encoder that extracts information from raw before transmission. extracted then encoded into channel symbols transmitted the BS. At BS, received are decoded back original information, which undergoes further processing...

Microstructure evolution of dynamic recrystallization AZ31 magnesium alloy during isothermal heating process was simulated by cellular automaton method (CA method).When heat holding time is constant, the grain size increases significantly with increase temperature.When temperature slightly time.By compared CA simulation results experimental results, maximum relative error 16.5%.It proved that may be used to predict microstructure process.

In this paper, we jointly design the power control and position dispatch for Multi-unmanned aerial vehicle (UAV)-enabled communication in device-to-device (D2D) networks. Our objective is to maximize total transmission rate of downlink users (DUs). Meanwhile, quality service (QoS) all D2D must be satisfied. We comprehensively considered interference among communications transmissions. The original problem strongly non-convex, which requires high computational complexity traditional...

Micro-texture evolvement mechanism of AZ31 magnesium alloy during compressing deformation had been studied in situ tracking method by EBSD(Electron backscatter diffraction). The micro-texture at same observation areas, which compressed three times continually different degree, investigated. results presented that the rolling state is typical (0001) basic texture. When degree was 11% and temperature 170ଌ, grains orientation changed remarkably, most twined fully little partially. initial...

Abstract Reconfigurable intelligent surface (RIS) is an emerging technology to improve the spectral efficiency of wireless communication systems. However, high complexity beam design and non-negligible overhead associated with RIS limit number elements that can be deployed in practice. In this paper, we investigate downlink communications irregularly reflecting surfaces assist non-orthogonal multiple access (NOMA) To address challenge, propose a novel four-step resource allocation algorithm....

Abstract With the construction of wind power-photovoltaic-hydropower (WVH-system) clean energy base in river basin, complex geographical distribution characteristics WVH-system along basin and randomness fluctuation their output bring challenges to on a large scale. How consider complementary wind-photovoltaic (WV-power) cluster effect smooth WV-power curve is an important way solve this challenge. For reason, bundling optimization method based convergence proposed paper. Considering...