The dynamic uncertain environment and complex tasks determine that the unmanned aerial vehicle (UAV) system is bound to develop towards clustering, autonomy, intelligence. In this article, we present a comprehensive survey of UAV swarm intelligence from hierarchical framework perspective. Firstly, review basics advances intelligent technology. Then look inside investigate research work by classifying into five layers, i.e., decision-making layer, path planning control communication...

In this paper, we consider an energy-constrained unmanned aerial vehicle (UAV)-enabled mobile relay assisted secure communication system in the presence of a legitimate source-destination pair and multiple eavesdroppers with imperfect locations. The UAV employs power splitting (PS) scheme to simultaneously receive information harvest energy from source, then exploits time switching (TS) protocol perform relaying. Furthermore, full-duplex destination node which can confidential signals...

This paper investigates a dual-unmanned aerial vehicle (UAV)-enabled secure communication system, in which, UAV moves around to send confidential messages mobile user while another cooperative transmits artificial noise signals confuse malicious eavesdroppers. Both UAVs have energy constraints and the location information of eavesdroppers is imperfect. We consider worst-case secrecy rate maximization problem over all time slots. optimization solved by jointly designing three-dimensional (3D)...

This paper studies the beamforming designs for simultaneous wireless information and power transfer systems in two-way relaying (TWR) channels. The system consists of two energy-constrained source nodes which employ splitting (PS) to receive energy simultaneously from power-supply relay. To maximize weighted sum subject constraints quality service transmit powers, three well-known protocols, i.e., amplify-and-forward, bit level XOR-based decode-and-forward (DF), symbol superposition...

Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) provides three-dimensional information on aerosol optical properties across the globe. However, performance of CALIPSO depth (AOD) products under different air quality conditions remains unclear. In this research, three years level 2 AOD data (November 2013 to December 2017) were employed compare with Moderate Resolution Imaging Spectroradiometer (MODIS) columnar ground-based sun photometer measurements for same time...

The molecular mechanism underlying denervation-induced muscle atrophy is complex and incompletely understood. Our previous results suggested that inflammation may play an important role in the early stages of atrophy. Celecoxib reported to exert anti-inflammatory effects. Here, we explored effect celecoxib on sought identify involved. We found treatment significantly increased wet weight ratio CSA tibialisanteriormuscle. Additionally, downregulated levels COX-2, inflammatory factors reduced...

Muscle disuse and offloading in microgravity are likely the primary factors mediating spaceflight-induced muscle atrophy, for which there is currently no effective treatment other than exercise. Extracellular vesicles derived from bone marrow mesenchymal stem cells (BMSC-EVs) possess anti-inflammatory antioxidant properties, offering a potential strategy combating weightless muscular atrophy. In this study, human BMSCs-EVs (hBMSC-EVs) were isolated using super-centrifugation characterized....

Aerosols greatly influence global and regional atmospheric systems, human life. However, a comprehensive understanding of the source regions three-dimensional (3D) characteristics aerosol transport over central China is yet to be achieved. Thus, we investigate 3D macroscopic, optical, physical, properties aerosols based on March 2007 February 2016 data obtained from Cloud–Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) mission hybrid single-particle Lagrangian integrated...

In this paper, we develop a resource allocation technique for hybrid time division multiple access (TDMA) - non-orthogonal (NOMA) system with opportunistic assignment. particular, the available transmission is divided into several time-slots, through which users are served by exploiting power-domain NOMA. To fully exploit underlying benefits of TDMA-NOMA system, utilize resources efficiently jointly allocating transmit power and time-slots to groups in system. Furthermore, these allocated...

This paper investigates a machine learning-based power allocation design for secure transmission in cognitive radio (CR) network. In particular, neural network (NN)-based approach is proposed to maximize the secrecy rate of secondary receiver under constraints total transmit transmitter, and interference leakage primary receiver, within which three different regularization schemes are developed. The key advantage algorithm over conventional approaches capability solve problem with both...

The combination of time division multiple access (TDMA) and non-orthogonal (NOMA), referred to as hybrid TDMA-NOMA system, is considered a potential solution meet the unprecedented requirements for future wireless networks. While recent resource allocation techniques aiming individually maximize either spectral efficiency (SE) or energy (EE), this paper considers an SE-EE trade-off based technique system. This design offers additional degree freedom in allocation. proposed formulated...

Understanding terrestrial water storage (TWS) changes is crucial for management and hydrological applications. TWS are accurately observed by the Gravity Recovery Climate Experiment its Follow-On (GRACE/-FO) mission. However, low spatial resolution limits knowledge of distribution. This study proposes a novel constrained point-mass modeling approach, introducing data-driven regularization matrix to improve resolution. We derived solutions over Amazon River basin from April 2002 December...

This letter considers the problem of resource sharing between two selfish nodes in cooperative relay networks. In our system, each node can act as a source well potential relay, and both are willing to achieve an optimal signal-to-noise ratio (SNR) increase by adjusting their power levels for relaying. We formulate this two-person bargaining game, use Nash solution (NBS) win-win strategy nodes. Simulation results indicate NBS is fair that degree cooperation only depends on how much...

With the popularity of photovoltaic based green energy in smart grid systems, accurate information gathering becomes a critical issue predicting microgrid power input. In this paper, we propose new quality-optimized multimedia scheme, harvesting wireless sensor networks Internet things system, to provide best-effort sky camera accuracy for further available power. proposed approach, control and relay node selection strategies are jointly optimized achieve maximum image quality subject...

The industry treats the distributed acoustic sensing (DAS) system, which uses an optical fiber cable in vertical seismic profiling (VSP) data acquisition, as a new and fast-growing technology. high-quality set acquired from DAS acquisition system can produce high-precision VSP images obtain more detailed checkshots. However, field data, suffers strong coherent coupling noise. Many factors may cause noise, such slapping ringing due to physical placement, regular swing of wireline well,...

In this paper, we investigate different secrecy energy efficiency (SEE) optimization problems in a multiple-input single-output underlay cognitive radio (CR) network the presence of an harvesting receiver. particular, these efficient designs are developed with assumptions channels state information (CSI) at transmitter, namely perfect CSI, statistical CSI and imperfect bounded channel uncertainties. overarching objective here is to design beamforming technique maximizing SEE while satisfying...

This paper investigates an energy-constrained relay-assisted secure communication system in the presence of a legitimate source-destination pair and passive eavesdropper with imperfect channel state information (CSI). The relay exploits power splitting (PS) protocol to simultaneously harvest energy decode from received signal source, then forwards confidential full-duplex (FD) destination while it transmits artificial noise (AN) confuse eavesdropper. robust beamforming design is developed by...

This paper studies simultaneous wireless information and power transfer in full-duplex (FD) two-way relay networks, where two energy-constrained sources are served by a FD multi-antenna powersupply relay. Using technique at the can cause self-interference (SI) for signal forwarding, but this SI be useful energy harvesting sources. To reasonably compress utilize SI, we consider utility optimization problem aiming to maximize total harvested jointly optimizing transmit power, splitting ratio...

An implementation of high speed AES algorithm based on FPGA is presented in this paper order to improve the safety data transmission. The mathematic principle, encryption process and logic structure are introduced. So as reach porpose improving system computing speed, pipelining papallel processing methods were used. simulation results show that high-speed implemented correctly. Using method could be protected effectively.

Multiple-component model-based decompositions (MCSMs) of polarimetric synthetic aperture radar (PolSAR) data often exhibit overestimation volume scattering power, which makes the oriented built-up areas show rather than double-bounce scattering. Deorientation processing has been incorporated into three- and four-component decomposition algorithms to overcome this limitation, where coherency matrix is rotated minimise cross-polarised term. However, even with deorientation, some urban large...

This paper investigates a novel maritime wireless surveillance scenario, where legitimate monitor vessel moves around to eavesdrop the suspicious communication from unmanned aerial vehicle (UAV) with help of cooperative UAV. Specifically, UAV can adjust its jamming power and trajectory exactly control transmission rate link, thus improving vessel's performance. Furthermore, since cannot land or replenish energy on sea surface, allocation ocean should be carefully designed by thresholds....