One of the key enablers future wireless communications is constituted by massive multiple-input multiple-output (MIMO) systems, which can improve spectral efficiency orders magnitude. In existing MIMO however, conventional phased arrays are used for beamforming. This method results in excessive power consumption and high hardware costs. Recently, reconfigurable intelligent surface (RIS) has been considered as one revolutionary technologies to enable energy-efficient smart communications, a...

The 3GPP LTE system has been designed to offer significantly higher data rates, throughput, and lower latency for delay critical services. This improved performance be provided guaranteed under various mobility conditions. Hence, handover (HO) its are of high importance. paper investigates the procedure within in terms HO failure rate whole procedure. System level simulations a typical urban propagation environment, with different User Equipment (UE) speeds, cell radii traffic loads per have...

A novel 1-bit 256-element reconfigurable transmitarray antenna (RTA) at the Ku-band is presented. The element consists of two orthogonal H-shaped slots as receiving and transmitting structures, power transmission realized by a coupling microstrip line in between. Two p-i-n diodes integrated on can be electronically controlled to reverse excitation directions, thus generating states with 180° phase difference low loss. subwavelength spacing λ <sub...

To incorporate the superiority of both stochastic and robust approaches, a data-driven optimization is employed to solve security-constrained unit commitment model. This approach makes most use historical data generate set possible probability distributions for wind power outputs then it optimizes under worst-case distribution. However, this model suffers from huge computational burden, as large number scenarios are considered. tackle issue, duality-free decomposition method proposed in...

The design and experiment of a single-layer reconfigurable bidirectional antenna are presented for the first time, which combines dynamic radiation characteristics both transmitarray reflectarray. proposed element consists circular ring slot etched on one side dielectric substrate two PIN diodes integrated across slot. By turning them ON or OFF simultaneously, induced current directions reversed, thus achieving phase states with 180° difference. is achieved by utilizing continuity...

The Internet of Things (IoT) has emerged as one the key features next-generation wireless networks, where timely delivery status update packets is essential for many real-time IoT applications. Age Information (AoI) a new metric to measure freshness update. reduction violation probability that AoI updates exceeds given age constraint great significance guaranteeing information in systems. By modeling networks M/M/1 and M/D/1 queuing systems, this work focuses on characterizing peak sensor...

The realization of operationally stable blue organic light-emitting diodes is a challenging issue across the field. While device optimization has been focus to effectively prolong lifetime, strategies based on molecular engineering chemical structures, particularly at subatomic level, remains little. Herein, we explore effect targeted deuteration donor and/or acceptor units thermally activated delayed fluorescence emitters and investigate structure-property relationship between intrinsic...

Multi-way Theta-join queries are powerful in describing complex relations and therefore widely employed real practices. However, existing solutions from traditional distributed parallel databases for multi-way cannot be easily extended to fit a shared-nothing computing paradigm, which is proven able support OLAP applications over immense data volumes. In this work, we study the problem of efficient processing using MapReduce cost-effective perspective. Although there have been some works (...

This communication presents a novel decoupling device called cascaded power dividing network (C-PDDN). It is with two antennas operating in adjacent or even contiguous frequency bands to reduce the mutual coupling. To achieve high isolations at n desired points, an n-order C-PDDN can be accordingly designed. Each order PDDN consists of dividers (PDs), sections transmission lines, and one reactive component. Explicit design formulas are presented calculate parameters meet required isolation...

With the increasing complexity and scale of modern industrial processes, there widely exist two-valued variables (TVs), such as status monitoring numerical range variables. However, traditional process approaches (such principal component analysis partial least square) are strongly based on continuous (CVs), thus they totally ignore useful merit inherent in TVs. Recently, both CVs TVs used combination for processes first time. The mixed hidden naive Bayesian model (MHNBM) feature-weighted...

Effective process monitoring is both a prerequisite and guarantee for high system reliability. In modern industrial processes, binary variables may appear together with continuous variables, making more intractable. Recently, model named hybrid variable (HVM) has been proposed to conduct anomaly detection variables. Although the performance of HVM significantly improved after using information it assumes that every obeys single Gaussian distribution each Bernoulli distribution. It difficult...

The reconfigurable intelligent surface (RIS) has the capability to reconstruct radio environment of wireless channels, which can alleviate interference in spectrum-sharing system (SSS). In this article, current research directions RIS-aided SSS and proposed methods joint optimization about passive beamforming RIS active access points are summarized analyzed obtain good insight into technique. improve spectral efficiency (SE) energy (EE) even complicated scenarios, such as coexisting with...

We study the average Age of Information (AoI) and peak AoI (PAoI) a dual-queue status update system that monitors common stochastic process through two independent channels. Although double queue parallel transmission is instrumental in reducing AoI, out order data arrivals also imposes significant challenge to performance analysis. consider settings: M-M where service time servers exponentially distributed; M-D which one server distributed other deterministic. For systems, closed-form...

Abundant real-time applications over Internet of Things (IoT) have imperative demands on timely information. Compared to average Age Information (AoI), distribution AoI characterizes the timeliness in more details. This article studies an IoT-based multisource status update system. By modeling system as a M/G/1/1 bufferless preemptive queue, general formulas violation probabilities and probability density functions (p.d.f.s) PAoI are derived based time-domain approach. For case with...

Deep convolutional neural networks achieve remarkable visual recognition performance, at the cost of high computational complexity. In this paper, we have a new design efficient layers based on three schemes. The 3D convolution operation in layer can be considered as performing spatial each channel and linear projection across channels simultaneously. By unravelling them arranging sequentially, proposed is composed single intra-channel convolution, which computation negligible, projection. A...

A 16 ×16 -element reconfigurable transmitarray antenna (RTA) is designed and experimented in this paper. The proposed element consists of a receiving (Rx) structure transmitting (Tx) structure. rectangular patch with C-shaped probe-fed as the Tx to obtain characteristics broad bandwidth low loss, where U-shaped slot Rx simple Two PIN diodes are symmetrically integrated on feeding line. By turning them ON or OFF simultaneously, induced current directions reversed, thus achieving two phase...

Due to the limited ability of a single unmanned aerial vehicle (UAV), group vehicles (UAVs) have attracted more attention in communication and radar fields. The use an integrated sensing (ISAC) system can make modules share module’s resources, coupled with efficient resource allocation methods. It effectively solve problem inadequate UAV resources low utilization rate resources. In this paper, is addressed for UAVs achieve trade-off between detection performance, where ISAC equipped UAVs....

This work investigates a remote status updating system where the transmission process is modeled as multi-stream M/G/1/1 non-preemptive system. We derive closed-form expression of average AoI each stream in heterogeneous case, distributions service time are different for streams. To obtain more insights, we apply results homogeneous system, identical, and find that preemption packets would not always lead to reduction AoI, especially when variance coefficient small. further optimize...

Along with the completion of development 4G technologies, global mobile community starts study next generation i.e. 5G technologies. This paper proposes a new flexible architecture for networks based on Network Function Virtualization (NFV) and Software Defined (SDN) which is adaptable to use cases scenarios. Then implementation reference some typical network deployment are discussed. Besides, key issues further also indicated at end.

A low-profile wide-angle reconfigurable transmitarray antenna (RTA) is proposed in this communication. This RTA consists of a feeding antenna, phase transforming lens, and 1 bit phase-reconfigurable transmitting (PRTA). The composed 12 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\times12$ </tex-math></inline-formula> slot array fed by 36-way waveguide power divider, which possesses the characteristics...