This article studies the resource allocation for intelligent reflecting surface aided vehicular communications based on slowly varying large-scale fading channel information. To meet different quality-of-service (QoS) requirements of communications, we aim to maximize sum vehicle-to-infrastructure (V2I) link capacity while guaranteeing minimum signal-to-interference-plus-noise ratio (SINR) vehicle-to-vehicle (V2V) links. More specifically, power allocation, IRS reflection coefficients and...

Internet of remote things (IoRT) networks are regarded as an effective approach for providing services to smart devices, which often and dispersed over in a wide area. Due the fact that ground base station deployment is difficult power consumption devices limited IoRT networks, hierarchical Space-Air-Ground architecture very essential these scenarios. This paper aims investigate energy efficient resource allocation problem two-hop uplink communication (SAG-IoRT) assisted with unmanned aerial...

Given the limited transmission power of smart devices in Internet Remote Things (IoRT), unmanned aerial vehicle (UAV) aided space-air-ground (SAG) networks become a beneficial remedy for uplink data IoRT networks. In this article, we propose SAG–IoRT framework, where drones act as relays to upload from low earth orbit satellites. Considering large number devices, maximize system capacity by jointly optimizing connection scheduling, control, and UAV trajectory, joint optimization is nonconvex...

Given suburban and rural areas with limited ground infrastructure, the Internet of Remote Things (IoRT) is considered as a promising way to provide services for smart devices that have low computing capability wide coverage. In this paper, we present multiple unmanned aerial vehicle (UAV) space-air- (SAG) IoRT offloading network, which provides powerful edge cloud services. Then, resource allocation scheme under partial mode studied, jointly optimizes device scheduling, partitioning, bit UAV...

Internet of remote things (IoRT) as a platform to support data connections in areas has an urgent need for high-throughput and sustainable communications. In this paper, we investigate multi-unmanned aerial vehicle (UAV) enabled space-air-ground wireless powered communication network (SAG-WPCN) where UAVs are dispatched decode-and-forward (DF) relays assist the from ground nodes (GNs) satellite, equipped with power transfer payload providing ubiquitous energy GNs. This paper aims maximize...

The abstract nature of quantum mechanics makes it difficult to visualize. This is one the reasons taught in language mathematics. Without an opportunity directly observe or interact with phenomena, students struggle develop conceptual understandings its theories and formulas. In this paper we present process designing a digital game that supplements introductory curricula. We our design anchored on three key challenges: 1) drawing upon students’ past experiences knowledge classical while at...

With the continuous development of emerging information technologies, preciousness and scarcity wireless spectrum resources are becoming increasingly prominent. rapid mobile communications, Long Term Evolution (LTE) system is actively studied widely deployed. Meanwhile, satellite communication also one research hotspots in recent years. The compatibility analysis two systems adjacent frequency same has far-reaching significance. In this paper, we study coexistence TD-LTE services (MSS). By...

In this paper, a UAV-BS dual connectivity system in downlink wireless networks is studied. the considered model, it combines high mobility of unmanned aerial vehicles (UAVs) and (DC) to provide users with higher data rates ubiquitous communication services dense scenarios such as large concert scenes. UAVs base stations (BSs) for simultaneously. We formulate joint access point selection power allocation problem maximize throughput. However, mixed integer nonlinear programming (MINLP)...

Device-to-device (D2D) and caching can effectively solve the problem of repeated transmission plentiful short videos in wireless networks. This paper considers a downlink video process among cellular users D2D with interference between co-channel users. Caching user preferences is also taken into consideration to improve system capacity. Joint channel power allocation optimized maximize sum rate all The mixed integer nonlinear programming (MINLP) hard solve. Firstly, concept cache similarity...

Device-to-device (D2D) communication has become a key technology to solve the outbreak of short video traffic in network. There are many users with different interests Internet, and request diverse videos when they need them. At same time, constantly moving, which will affect distance D2D communication. Therefore, user's mobility should be taken into account designing cache scheme. Based on user interest, this paper formulates problem maximizing energy spectral efficiency joint connection...

Reconfigurable meta-surface (RMS) is proposed as a very promising and novel technology, which composed of large number low-cost passive elements, can achieve beamforming by controlling the amplitude phase incident electromagnetic (EM) waves. Therefore, in order to solve challenges high power consumption cost existing base stations (BSs), we propose low-power transmissive RMS multi-antenna system this paper. Specifically, first provide an overview system, including its advantages, network...

The intelligent process of monitoring power grid is heavily needed as expansion modern cities and development smart grid. At present, most the dispatching control systems urban grids are manually completed by dispatchers for monitoring, early warning post-processing operation accidents. degree informatization intelligence has great room improvement. In order to solve above problems, this paper illustrates a log-based event mode mining method with Petri Net model monitor status By analyzing...

The identification of blade self-excited vibration on a fan is attached to great importance for aero-engine operation safety. A non-contact method based acoustic measurement proposed identify via the run-up test, where circular microphone array arranged in inlet section three-stage fan. test results at 6880r/min present that asynchronous aerodynamic excitation frequency has connection with frequency. In order reveal between sound pressure fluctuations and phenomena, mode decomposition are...