Results 31 to 40 of about 9,429 (256)

Set-based Line-of-Sight (LOS) path following with collision avoidance for underactuated unmanned surface vessel [PDF]

2016 24th Mediterranean Conference on Control and Automation (MED), 2016
A cornerstone ability of an autonomous unmanned surface vessel (USV) is to avoid collisions with stationary obstacles and other moving vehicles while following a predefined path. USVs are typically underactuated, and this paper extends recent results in set-based guidance theory to an underactuated surface vessel, resulting in a switched guidance ...
Signe Moe, Kristin Ytterstad Pettersen
openaire   +2 more sources

Multilayer Self‐Limiting Electrospray Deposition via Stepped Voltage Bias

Advanced Engineering Materials, EarlyView.
Self‐limiting electrospray deposition (SLED) uses a high voltage to generate and deposit a charged payload on a target surface. The coating retains its charge, repelling newly arriving material. SLED thickness can be decreased by applying a secondary bias to the target.
Madhuri Deb, S. Rahman Pejman, Alexander Jakimowicz, Jonathan P. Singer   +3 more
wiley   +1 more source

Adaptive Observer-Based Line-of-Sight Guidance Law for Path Following of Underactuated Unmanned Surface Vehicle With Sideslip Compensation

IEEE Access
In this paper, the path following problem of an underactuated unmanned surface vehicle (USV) in the presence of environmental disturbances is considered. To compensate for the sideslip induced by drift forces, an adaptive Kalman-like observer is proposed
Luka Martinovic, Zarko Zecevic, Marco Bibuli, Massimo Caccia, Dula Nad   +4 more
doaj   +1 more source

Performance Analysis of Dense Small Cell Networks With Practical Antenna Heights Under Rician Fading

IEEE Access, 2018
In this paper, we examine the combined impacts of distance-dependent Rician fading channel model and the absolute difference between the heights of base station (BS) and user equipment (UE) antennas on the coverage probability and the area spectral ...
Amir H. Jafari, David Lopez-Perez, Ming Ding, Jie Zhang   +3 more
doaj   +1 more source

An Indoor Channel Model for High Data-Rate Communications in D-Band

IEEE Access, 2020
This paper proposes a measurement based modeling of D-band indoor channels. Different indoor environments were considered including Line-of-Sight (LOS) and Non Line-of-Sight (NLOS) conditions.
L. Pometcu, R. D'Errico
doaj   +1 more source

DEC-LOS-RRT: Decentralized Path Planning for Multi-robot Systems with Line-of-sight Constrained Communication

2021 IEEE Conference on Control Technology and Applications (CCTA), 2021
8 pages, 8 figures, Presented at CCTA ...
Victoria Tuck, Yash Vardhan Pant, Sanjit A. Seshia, S. Shankar Sastry   +3 more
openaire   +2 more sources

Correlated Charge Transport in an Organic Coulomb Glass

Advanced Materials, EarlyView.
ABSTRACT Advances in the development of organic field‐effect transistors (OFETs), electrically gated organic semiconductors (EGOFETs), and organic electrochemical transistors (OECTs) allow for the operation of these devices at very high charge‐carrier densities, where Coulomb interactions between carriers can be expected to become significant.
Magdalena Sophie Dörfler, Heinz Bässler, Harald Oberhofer, Anna Köhler   +3 more
wiley   +1 more source

Finite Time Guidance Law to Intercept Desired LOS Angle Using NTSM Control [PDF]

فصلنامه علوم و فناوری فضایی, 2018
Nonsingular terminal sliding mode (NTSM) guidance for intercepting the desired line of sight (LOS) angle in terminal phase is proposed in this paper. In order to satisfy the predefined LOS angle and to intercep into target, a nonsingular terminal sliding
Vahid Behnamgol, Ahmadreza Vali, ali mohammadi   +2 more
doaj  

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

A Geometry-Based Modelling Approach for the Line-of-Sight Probability in UAV Communications

IEEE Open Journal of the Communications Society
This paper presents a geometry-based three-dimensional Probability of Line of Sight $(P_{\mathrm {LoS}})$ model for generic urban environments. The existing $P_{\mathrm {LoS}}$ models are mostly empirical, based on measurements or ray-tracing ...
Abdul Saboor, Evgenii Vinogradov, Zhuangzhuang Cui, Akram Al-Hourani, Sofie Pollin   +4 more
doaj   +1 more source