The combination of wireless energy transfer (WET) and mobile edge computing (MEC) has been proposed to satisfy the supply computation requirements resource-constrained Internet Things (IoT) devices. However, efficiency task offloading rate cannot be guaranteed when links between hybrid access point (HAP) IoT devices are hostile. To address this problem, paper aims at utilizing intelligent reflecting surfaces (IRS) technique improve WET offloading. In particular, we investigate total bits...

With the maturation of wireless charging technology, Wireless Rechargeable Sensor Networks (WRSNs) has become a promising solution for prolong network lifetimes. Recently studies propose to employ mobile charger (MC) simultaneously charge multiple sensors within same range, such that performance can be improved. In this paper, we aim jointly optimize number dead and energy usage effectiveness in multi-node scenarios. We achieve by introducing partial mechanism, meaning instead following...

In wireless rechargeable sensor networks (WRSNs), prior studies mainly focus on the optimization of power transfer efficiency. this work, we consider cost for building and operating WRSNs. network, nodes can be charged by mobile chargers, that have limited energy which is used charging moving. We introduce a novel concept called "shuttling" an optimal algorithm, proven to achieve minimum number chargers in theory. also point out limitations motivates development solutions named...

Charging scheduling plays a significant role in wireless rechargeable sensor networks (WRSNs), which benefit from stable and reliable energy supplements via charging. This paper proposes an importance-different charging (IDCS) strategy for improving utility as well reducing the data loss. The unique feature of IDCS is that, it distinguishes nodes by means different importance delivery. Matroid theory used to achieve our goals. First, two important factors are determined model, i.e., deadline...

Mobile charging can provide stable and reliable energy replenishment for wireless rechargeable sensor network (WRSN). However, relatively low utility exists in existing solutions. In this paper, we present a utility-based collaborative (UBCC) strategy to maximize the of mobile chargers (MCs) large-scale WRSNs. Charging MCs server are employed jointly achieve our goal by three aspects. First, path merging scheme is designed save traveling paths MCs. Unlike studies with entirely diverse...

Wireless sensor network are promising to be used in a wide range of applications, the need effective save and retrieve data will grow. Metadata, self-describing about nodes sensing data, assist exchange between different users understand capabilities provided by heterogeneous networks. Metadata management resource constrained is unfeasible. Meanwhile, agent suitable with its characteristics self-organization, distributed strong processing capability. So, minimize energy cost sensor, prolong...

In this paper we study a team orienteering problem, which is to find service paths for multiple vehicles in network such that the profit sum of serving nodes maximized, subject cost budget each vehicle. This problem has many potential applications IoT and smart cities, as dispatching energy-constrained mobile chargers charge energy-critical sensors possible prolong lifetime. paper, first formulate where different are types, node can be served by vehicles, submodular function number it. We...

In this article we study a generalized team orienteering problem (GTOP), which is to find service paths for multiple homogeneous vehicles in network such that the profit sum of serving nodes maximized, subject cost budget each vehicle. This has many potential applications IoTs and smart cities, as dispatching energy-constrained mobile chargers charge energy-critical sensors possible prolong lifetime. article, first formulate GTOP problem, where node can be served by different vehicles,...

Wireless charging has been demonstrated as a promising technology for prolonging device operational lifetimes in Rechargeable Networks ( WRNs ). To schedule mobile charger to move along predesigned trajectory charge devices, most existing studies assume that the precise location information of devices is already known. Unfortunately, this assumption does not always hold real application, because activities vast majority carried by agents appear dynamic and random. best our knowledge, first...

In this paper, we study the employment of a mobile charger to charge lifetime-critical sensors under multi-node partial-charging model, in which can simultaneously within its charging range and each sensor may be partially charged time. We notice that existing studies only scheduled minimize number dead sensors, but did not consider scheduling for have already run out their energy, will last by charger. Then, durations very long. how also reduce sensors. To end, first formulate lifetime...

Combined cooling, heating and power (CCHP) micro-grids have the advantage of high energy efficiency, can be integrated with renewable energies demand response programs (DRPs). With deepening electricity market (EM) reforms, how to carry out operation optimization under EM circumstances will become a key problem for CCHP micro-grid development. This paper proposed stochastic-CVaR (conditional value at risk) model consideration participation, wind accommodation multiple DRPs. Specifically,...

Benefitting from the breakthrough of wireless power transfer technology, lifetime Wireless Sensor Networks (WSNs) can be significantly prolonged by scheduling a mobile charger (MC) to charge sensors. Compared with omnidirectional charging, MC equipped directional antenna concentrate energy in intended direction, making charging more efficient. However, all prior arts ignore considerable leakage behind (i.e., back lobe), resulting wasted vain. To address this issue, we study fundamental...

We successfully employ low temperature processed conductive polymer PH1000 as an alternative electrode of ITO to fabricate HTL-free PSCs. The best device shows efficiency up 9.31%, providing a much simpler architecture for the application PSC.

Benefitting from the maturation of Wireless Power Transfer technology, Rechargeable Sensor Networks have become a promising solution for prolonging network lifetime. In practical charging scenarios, obstacles are ubiquitous. However, most prior arts failed to consider combined impacts material, size, and location on performance, making these schemes unsuitable real applications. this article, we study fundamental issue W ireless ch A rger placement w I th obs T acles (WAIT), that is, how...

Distracted driving increases the risk of errors and accidents, it has become main factor leading to accidents. Currently, a large amount information is displayed on in-vehicle panels, which possibly distract drivers' attention, diverting their gaze from road. To minimize negative impact distracted driving, this study sought optimize design icons presented vehicle screens. We investigated effect icon size, position, state, age perception time, performance, subjective evaluations. A total 42...

Wireless charging has been demonstrated as a promising technology for prolonging device operational lifetimes in Rechargeable Networks (WRNs). To schedule mobile charger to move along predesigned trajectory charge devices, most existing studies assume that the precise location information of devices is already known. Unfortunately, this assumption does not always hold real application, because activities vast majority carried by agents appear dynamic and random. best our knowledge, first...