Emerging digital twin (DT) and mobile-edge computing (MEC) are crucial for enabling the rapid development of 6G. However, existing works ignore edge collaboration, which can provide system with additional performance gain. In this article, we study problem mobile users (MUs) intelligently offloading tasks to cooperative servers (MESs) assistance DT. Specifically, a DT-assisted task scheme (DTTOS) that consists selection MESs intelligent is proposed. Channel state information (CSI) blockchain...

A broadband tunable metamaterial graphene absorber is investigated in this paper. The unit cell of the proposed composed four patch resonators. By tuning chemical potential and geometric size each patch, simulated total reflectivity less than -10 dB from 22.02 to 36.61 THz with thickness 0.76 um (only 0.09λ at lowest frequency). analysis surface current, magnetic field power flow distributions has been performed better understand absorption mechanism. Moreover, achieves its bandwidth...

Applications in the Internet of Vehicles (IoV) are usually accompanied by ultralow network response latency requirement. A promising approach to meet this demand is combining IoV with mobile edge computing and enabling devices share their communication, computation, caching (3C) resources via intelligent cooperation. However, allocation 3C supported artificial intelligence (AI) demands a huge number training data strong ability which impossible achieve on resource-limited board unit (OBU) or...

To effectively fuse speech and visual features, this letter proposes a multi-modal emotion recognition method by fusing correlation features of speech-visual. Firstly, are extracted two-dimensional convolutional neural network (2D-CNN) three-dimensional (3D-CNN), respectively. Secondly, the is processed feature analysis algorithm in fusion. In addition, class information also applied to algorithm, which can improve performance recognition. Finally, support vector machines (SVM) completes...

Disseminated intravascular coagulation (DIC) is a thrombo-hemorrhagic disorder that can be life-threatening in critically ill children, and the quest for an accurate efficient method early DIC prediction of paramount importance. Candidate predictors encompassed demographics, comorbidities, laboratory findings, therapy strategies. A stepwise logistic regression model was employed to select features included final model. Six machine learning algorithms-logistic (LR), extreme gradient boosting...

This brief presents an analog mm-wave active phase shifter utilizing a frequency-reconfigurable vector-summing topology. A frequency-tunable I/Q signal generator followed by single-to differential convertors and variable gain amplifiers is employed to build the shifter. The designed can be switched operate over 24-30 GHz band or 35-41 band. shifter, fabricated in 90 nm CMOS technology, provides 360° of shifting range both frequency bands while consuming only 17.6 mW power 0.34 mm <sup...

The long-term sensor drift phenomenon seriously restricts the performance of Electronic Nose (E-nose) systems in their various applications. Due to frequent recalibrations, traditional compensation methods are costly and laborious, limited due nonlinear dynamic properties drift. latest proposed Broad Learning System (BLS) has been confirmed be an efficient effective learning technique for many machine problems. However, BLS with cross-domain capability rarely studied. In this paper, a novel...

Source localization is a key technology in array signal processing. However, it has serious problem that the direction of arrival (DOA) estimation accuracy reduced at low signal-to-noise ratio (SNR). Thus, this Letter proposes an improved near-field multiple classification (INF-MUSIC) algorithm to improve DOA SNR. Firstly, fourth-order cumulant used construct Hermitian matrix with only information. Secondly, spatial spectrum physical property breakpoint and approaches larger value DOA, thus...

An innovative iterative process is proposed to acquire the dynamic of multichannel slotted ALOHA (S-ALOHA). It reveals direct relation between number contending devices that perform their jth random access (RA) attempt at ith RA slot and newly arrived before slot. These results allow engineers analytically derive probability density function delay S-ALOHA, as well its cumulative average value. Under stable attempts assumption, simplified form above analysis given, with which we prove...

In context of Machine Type Communication (MTC) applications, network has to face increased load as well possible surges MTC traffic due massive concurrent data and signaling transmission, in which case the interarrival time distribution devices may follow Beta distribution. this paper, we model with applications a Beta/M/1 queue model. By deducing moment generation function's analytical expression distributions integral shape parameters, full performance analysis is presented. The...

Machine Type Communication (MTC), which is also called as machine to communication over cellular mobile networks, has broad application prospects and market potential. However, due massive concurrent data control signaling transmitted by a lot of MTC user equipments (UEs), radio access network (RAN) congestion becomes an important issue. In this paper, we propose novel class-dependent back-off scheme for LTE system protect RAN from random channel (RACH) overload. Numerical results show that...

In present-day mechanized garlic seeding, high missing rates and low qualified percentages of single seeds are common problems; thus, a finger clip plate seed-metering device was designed in this study. First, the structure working principle were studied. Subsequently, critical component parameters determined using theoretical calculations; then, EDEM software used single-factor simulation experiments to analyze effects opening diameter seed-collecting spoon, operating speed seeding tray,...

Based on the known binary sequence sets and Gray mapping, a new method for constructing quaternary is presented resulting sets' properties are investigated. As three direct applications of proposed method, when we choose aperiodic, periodic, Z-complementary as sets, resultant respectively. In comparison with by Jang et al., can cope either both aperiodic periodic cases or even odd lengths sub-sequences, whereas former only fit case length sub-sequences. consequence, our al.'s methods, an...

In this letter, we present a family of 16-QAM periodic complementary sequences (PCSs), including three constructions. Our basic idea is to transform the known quaternary PCSs/GCSs (Golay sequences) into required ones. order guarantee that such transformation every construction successful, own sufficient conditions constructions are derived, respectively. methods can provide quite rich PCSs, whose main parameters up period 50 and number 12 sub-sequences given in Table 1, from large available...

In this article, we propose an energy-efficiency-aware integrated architecture of cooperative computing (CC) to support the demands amount in blockchain-based Internet Things (IoT). Specifically, assume that multiple servers are placed at each data access point (DAP). The across DAPs can be virtualized constitute a CC pool flexibly allocate resource. When received from DAP is accumulated certain length one block, blockchain will implemented generate correct Nonce value meeting threshold hash...