Results 171 to 180 of about 2,816 (255)

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

Precise orbital parameters,masses, and parallax of the subgiant binary system 12 Persei: a combined spectroscopic-interferometric analysis. [PDF]

Sci Rep
Abushattal AA, Widyan H, Dirk M, Al-Wardat MA, Al-Mashaqbeh M, Mendez RA, Dewi DA, Hussein AM, Abu-Alrob EM.   +8 more
europepmc   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

The faintest, extremely variable X-ray tidal disruption event from a supermassive black hole binary? [PDF]

Innovation (Camb)
Huang M, Xue Y, Li S, Liu F, Zhu S, Chen JH, Shen RF, Wang Y, Yang Y, Jiang N, Bauer FE, Vignali C, Zou F, Wang J, Filippenko AV, Luo B, Qin C, Quirola-Vásquez J, Wang JX, Fan L, Sun M, Wu Q, Ni Q, Brink TG, Wang T, Zheng W, Shu X, Zheng X, Lin X, Kong X, Wang Y, Luo Y, Lin Z.   +32 more
europepmc   +1 more source

Tracing Three Decades of Low Earth Orbit Satellite Communication Development: A Bibliometric and Main Path Analysis of Network Architectures, Protocol Evolution, and Emerging Intelligent Services

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Low Earth Orbit (LEO) satellite communication systems have evolved into a critical component of global broadband networks, enabling wide‐area connectivity, IoT services, and intelligent multilayer satellite–terrestrial integration. Despite rapid advancements in constellation deployment, routing mechanisms, resource management, and LEO–5G/6G ...
Wei‐Hao Su, Ya‐Chen Chuang, Long‐Sheng Chen   +2 more
wiley   +1 more source

Lone black holes promise fresh insights into the fates of massive stars. [PDF]

Proc Natl Acad Sci U S A
Croswell K.
europepmc   +1 more source

Single‐Particle Insights Into the Electronic Structure and Enhanced Stability of CsPbBr3/FAPbBr3 Core/Crown Nanoplatelets at the Nanometer Scale

Small, EarlyView.
Single‐particle‐level investigation using scanning tunneling spectroscopy reveals electronic structure and type‐I band alignment of individual CsPbBr3@FAPbBr3 core‐crown nanoplatelet. Crown passivation suppresses deep trap states by 47% and markedly improves electrical stability under repeated bias sweeps.
Shaocheng Shen, Anuraj S. Kshirsagar, John Michael Lane, Chenguang Zhang, Haixin Zhang, Kedar Hippalgaonkar, Neeraj Rai, Mahesh K. Gangishetty, Kun Wang   +8 more
wiley   +1 more source

Starspots as the origin of ultrafast drifting radio bursts from an active M dwarf. [PDF]

Sci Adv
Zhang J, Tian H, Bellotti S, Cang T, Callingham JR, Vedantham HK, Chen B, Yu S, Zarka P, Louis CK, Jiang P, Lu H, Gao Y, Sun J, Gan H, Li H, Sun C, Lei Z, Huang M.   +18 more
europepmc   +1 more source

A Bilayer Rare‐Earth/High‐κ Oxide Memristor for Energy‐Efficient Neuromorphic Intelligence

Small, EarlyView.
Interface‐engineered Gd2O3/HfO2 bilayer memristors demonstrate controlled filament formation, ultralow switching energy (∼13.56 pJ), and fast operation (∼350 ns) with a high ON/OFF ratio (∼107). The devices exhibit stable analog synaptic behavior and enable pattern recognition on Fashion‐MNIST, underscoring their promise for energy‐efficient ...
Hammad Ghazanfar, Muhammad Rabeel, Honggyun Kim, Sobia Nisar, Muhammad Wajid Zulfiqar, Muneeb Ahmad, Rana Faryad Ali, Ghulam Dastgeer, Deok‐kee Kim   +8 more
wiley   +1 more source

Extreme properties of a compact and massive accreting black hole host in the first 500 Myr. [PDF]

Nat Commun
Tripodi R, Martis N, Markov V, Bradač M, Di Mascia F, Cammelli V, D'Eugenio F, Willott C, Curti M, Bhatt M, Gallerani S, Rihtaršič G, Singh J, Gaspar G, Harshan A, Judež J, Merida RM, Desprez G, Sawicki M, Goovaerts I, Muzzin A, Noirot G, Sarrouh GTE, Abraham R, Asada Y, Brammer G, Estrada-Carpenter V, Felicioni G, Fujimoto S, Iyer K, Mowla L, Strait V.   +31 more
europepmc   +1 more source