High-efficiency electromagnetic (EM) functional materials are the core building block of high-performance EM absorbers and devices, they indispensable in various fields ranging from industrial manufacture to daily life, or even national defense security space exploration. Searching for high-efficiency realizing devices remain great challenges. Herein, a simple solution-process is developed rapidly grow gram-scale organic-inorganic (MAPbX3 , X = Cl, Br, I) perovskite microcrystals. They...

Abstract Atomic‐molecular engineering is an effective way to accurately tailor the microstructures and components of materials at micro‐nano scale, which can be applied flexibly manipulate their electromagnetic (EM) response. Herein, graphene microlaminates with multi‐layer structure are fabricated by atomic cluster oxidative molecular layer deposition for first time. The enable a tunable EM loss (from 0.93 3.94 imaginary permittivity from 0.17 0.25 permeability) changing...

The increasing popularity of social networks has inspired recent research to explore graphs for marketing and data mining. As often contain sensitive information about individuals, preserving privacy when publishing becomes an important issue. In this paper, we consider the identity disclosure problem in releasing <i>weighted</i> graphs. We identify <i>weighted 1*-neighborhood attacks</i> , which assume that attacker knowledge not only a target's one-hop neighbors connections between them (...

A noble-metal-free Z-scheme system was constructed for photocatalytic overall splitting.

The efficiency of sensor networks depends on the coverage monitoring area. Although in general a sufficient number sensors are used to ensure certain degree redundancy so that can rotate between active and sleep modes, good deployment is still necessary balance workload sensors. In network with locomotion facilities, move around self-deploy. movement-assisted deals moving from an initial unbalanced state balanced state. Therefore, various optimization problems be defined minimize different...

The efficiency of sensor networks depends on the coverage monitoring area. Although, in general, a sufficient number sensors are used to ensure certain degree redundancy coverage, good deployment is still necessary balance workload sensors. In network with locomotion facilities, can move around self-deploy. movement-assisted deals moving from an initial unbalanced state balanced state. Therefore, various optimization problems be defined minimize different parameters, including total...

We propose a notion of an extended dominating set where each node in ad hoc network is covered by either neighbor or several 2-hop neighbors. This work motivated cooperative communication networks whereby transmitting independent copies packet generates diversity and combats the effects fading. first show NP-completeness minimum problem. Then, heuristic algorithms, global local, for constructing small are proposed. These nontrivial extensions existing algorithms regular The application...

Bandgap-tunable black phosphorus quantum dots prepared by a liquid exfoliation method in mixture solvent of N-methylpyrrolidone and oleic acid can act as efficient photocatalysts for the degradation rhodamine B. This is first report on solely capable destroying organic pollutants under visible light irradiation.

A gain-enhanced wideband multiple-input multiple-output (MIMO) antenna with dual polarization and high isolation is proposed for microbase station application. It includes two mutually orthogonal bowtie dipole radiators, four parasitic elements the switch function of ON-/OFF-state, vertical stubs, a cavity, which are fed by pair 50 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\Omega $...

In this paper, a novel super-wideband multiple-input multiple-output (SWB-MIMO) antenna system with high isolation has been proposed, each element consisting of spade-shaped radiation patch, defected ground structure (DGS) as well windmill-shaped decoupling structure. The elliptical slot etched on the patch and rectangular DGS are jointly utilized to make better performance impedance bandwidth. Both four-element eight-element SWB-MIMO systems simulated analyzed, respectively. A prototype...

This paper addresses fault-tolerant topology control in a heterogeneous wireless sensor network consisting of several resource-rich supernodes, used for data relaying, and large number energy-constrained nodes. We introduce the k-degree anycast (fc-ATC) problem, with objective selecting each sensor's transmission range such that is k-vertex supernode connected total power consumed by sensors minimized. Such topologies are needed applications support reporting, even event failures up to k - 1...

In this paper, a multi-band AMC-backed antenna system characterized with high gain and low-profile is proposed. It constructed by placing quad-band coplanar-waveguide (CPW) over an AMC four zero-phases in the reflection coefficient. The CPW consists of ornamentalpillar-shaped patch specially designed parasitic elements, defected ground structure (DGS), for application frequency bands 2.45, 3.5, 4.6 5.8 GHz. To improve antenna's radiation performance, artificial magnetic conductor (AMC)...

In this paper, we address the Topology control with Cooperative Communication (TCC) problem in ad hoc wireless networks. communication is a novel model introduced recently that allows combining partial messages to decode complete message. The objective of TCC obtain strongly-connected topology minimum total energy consumption. We show NIP-complete and design two distributed localized algorithms be used by nodes set up their ranges. Both can applied on top any symmetric, reduce power first...

Two schools of thought exist in terms handling mobility mobile ad hoc networks (MANETs). One is the traditional connection-based model, which views node as undesirable and tries to either remove (through recovery schemes) or mask tolerant effect mobility. The other mobility-assisted considers a desirable feature, where routing based on store-carry-forward paradigm with random controlled movement nodes (called ferries). It well known that increases capacity MANETs by reducing number relays...

This work describes a high-yield extracellular biosynthesis of ZnS QDs via unique molecular mediation mechanism driven by the mixed sulfate reducing bacteria (SRB). The SRB have obtained highest ever QD rate 35.0–45.0 g/(L·month). biogenic with an average crystallite size (ACS) 6.5 nm greater PL activity and better uniformity than that chemical route. Peculiar proteins (EPs) weights approximately 65 14 kDa specially adhere to QDs, which cover extraordinarily high contents acidic amino acids...

In this paper, a novel planar active artificial magnetic conductor (AAMC) frequency-reconfigurable antenna printed on an FR4 substrate is proposed. Its AAMC metal pattern in unit cell consists of compound-five-ring nesting (CFRN) structure. It loaded with only one varactor diode connected to the ground plane by metallic via. comparison conventional single-circle-ring AMC, dimension CFRN-AMC has been reduced about 44% along lower reflection loss. The constructed placing triangle-shaped dipole...

A novel low-profile wideband antenna is proposed with high-gain, high-isolated, and dual-polarized properties. It consists of two mutually-orthogonal bowtie-shaped dipole radiators, four rectangular parasitic elements, a cylindrical artificial magnetic conductor (AMC) cavity. By introducing additional resonance generated, the bandwidth widened. The gain mainly improved by metallic wall AMC operates in ±90 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This article proposes a novel concept of flexible dual-polarized multiple-input multiple-output (MIMO) belt strap antenna with triple band. It can be integrated into the wearable biomedical network base station (WBNBS) intelligent Internet Medical Things (IoMT), setting up communication link smart mobile devices, thereby hosting wireless sensors to track vital signs human body. The proposed includes three identical units equidistantly distributed on strap. Each unit is composed two linearly...

Photocatalytic benzyl alcohol (BA) oxidation to value-added chemicals by semiconductors has attracted massive attentions due its industrial interest. In this work, Z-scheme heterojunction photocatalysts composed of FAPbBr3 nanocrystals (NCs) and WO3 with different morphologies are prepared. Benefiting from the strong redox potential morphological engineering, photocatalyst exhibits an outstanding performance BA benzaldehyde (BD) 99% selectively. Remarkably, after manipulating size NCs...

In this paper, we study the problem of maintaining sensing coverage by keeping a small number active sensor nodes and amount energy consumption in wireless networks. This paper extends result from [21] where only uniform range among all sensors is used. We adopt an approach that allows non-uniform ranges for different sensors. As opposed to node scheduling model [21], two new energy-efficient models are proposed. Our objective minimize overlapped area nodes, thus reduce overall prolong whole...

We consider a wireless sensor network consisting of set sensors deployed randomly. A point in the monitored area is covered if it within sensing range sensor. In some applications, when sufficiently dense, coverage can be approximated by guaranteeing coverage. this case, all points devices could used to represent whole area, and working are supposed cover sensors. Many applications related security reliability require guaranteed k-coverage at times. paper, we formalize k-(connected)...

In this paper, we consider the issue of efficient broadcasting in mobile ad hoc networks (MANETs) using network coding and directional antennas. Network coding-based focuses on reducing number transmissions each forwarding node performs multiple source/multiple message broadcast application, where combines some received messages for transmission. With help coding, total can be reduced compared to same nodes without coding. We exploit usage antennas further reduce energy consumption. A...

Noble-metal-free, visible-light-responsive and "green" MoS2 nanosheet modified-InVO4 heterostructures were synthesized as efficient photocatalysts for photocatalytic H2 production. The positive effect of intimate nanojunctions formed between InVO4 resulted in the excellent activity MoS2/InVO4 which is even higher than that Pt-loaded InVO4.