Results 31 to 40 of about 1,465,298 (295)

Optimal state observation using quadratic boundedness: Application to UAV disturbance estimation

International Journal of Applied Mathematics and Computer Science, 2019
This paper presents the design of a state observer which guarantees quadratic boundedness of the estimation error. By using quadratic Lyapunov stability analysis, the convergence rate and the ultimate (steady-state) error bounding ellipsoid are ...
Cayero Julián, Rotondo Damiano, Morcego Bernardo, Puig Vicenç   +3 more
doaj   +1 more source

Curvature-based pebble segmentation for reconstructed surface meshes [PDF]

Earth Surface Dynamics
Accurate segmentation of pebbles in complex 3D scenes is essential to understand sediment transport and river dynamics. In this study, we present a curvature-based instance segmentation approach for detecting and characterizing pebbles from 3D surface ...
A. Rheinwalt, B. Purinton, B. Bookhagen
doaj   +1 more source

Orientation, sphericity and roundness evaluation of particles using alternative 3D representations [PDF]

, 2014
Sphericity and roundness indices have been used mainly in geology to analyze the shape of particles. In this paper, geometric methods are proposed as an alternative to evaluate the orientation, sphericity and roundness indices of 3D objects.
Ayala Vallespí, M. Dolors, Cruz Matías, Irving   +1 more
core   +1 more source

Properties of an Aloha-like stability region

, 2016
A well-known inner bound on the stability region of the finite-user slotted Aloha protocol is the set of all arrival rates for which there exists some choice of the contention probabilities such that the associated worst-case service rate for each user ...
Walsh, John MacLaren, Weber, Steven, Xie, Nan   +2 more
core   +1 more source

A Novel Approach for Ellipsoidal Outer-Approximation of the Intersection Region of Ellipses in the Plane [PDF]

, 2017
In this paper, a novel technique for tight outer-approximation of the intersection region of a finite number of ellipses in 2-dimensional (2D) space is proposed. First, the vertices of a tight polygon that contains the convex intersection of the ellipses
A Kurzhanski, Benoit Champagne, BW Silverman, CT Chang, D Maksarov, F Preparata, FL Chernousko, G Toussaint, G Toussaint, Godfried Toussaint, H Edelsbrunner, H Freeman, Henk Wymeersch, J Matousek, J O’Rourke, J O’Rourke, L Ros, M Gholami, M Lahanas, NZ Shor, RA Horn, S Boyd, S Yousefi, Siamak Yousefi, SP Boyd, V Klee, W Kahan, Xiao-Wen Chang   +27 more
core   +2 more sources

The neural crest‐associated gene ERRFI1 is involved in melanoma progression and resistance toward targeted therapy

Molecular Oncology, EarlyView.
ERRFI1, a neural crest (NC)‐associated gene, was upregulated in melanoma and negatively correlated with the expression of melanocytic differentiation markers and the susceptibility of melanoma cells toward BRAF inhibitors (BRAFi). Knocking down ERRFI1 significantly increased the sensitivity of melanoma cells to BRAFi.
Nina Wang, Qian Sun, Daniel Novak, Lei Zhu, Juliane Poelchen, Tamara Steinfass, Yiman Wang, Viktor Umansky, Jochen Utikal   +8 more
wiley   +1 more source

Optimization-Based Monocular 3D Object Tracking via Combined Ellipsoid-Cuboid Representation

IEEE Access
Monocular 3D object tracking is a challenging task because monocular image lacks depth information necessary for 3D scene understanding. Modern methods typically rely on deep learning to reconstruct 3D information from learned prior, which demands ...
Gyeong Chan Kim, Youngseok Jang, H. Jin Kim   +2 more
doaj   +1 more source

An Ellipsoidal Branch and Bound Algorithm for Global Optimization

SIAM Journal on Optimization, 2009
19 ...
Hager, William, Phan, Dzung
openaire   +2 more sources

Plecstatin inhibits hepatocellular carcinoma tumorigenesis and invasion through cytolinker plectin

Molecular Oncology, EarlyView.
The ruthenium‐based metallodrug plecstatin exerts its anticancer effect in hepatocellular carcinoma (HCC) primarily through selective targeting of plectin. By disrupting plectin‐mediated cytoskeletal organization, plecstatin inhibits anchorage‐dependent growth, cell polarization, and tumor cell dissemination.
Zuzana Outla, Jan Kosla, Magdalena Prechova, Lukas Frick, Patricia Bortel, Yasmin Borutzki, Andrea Bileck, Christopher Gerner, Samuel M. Meier‐Menches, Selma Osmanagic‐Myers, Martin Gregor   +10 more
wiley   +1 more source

Using the Ellipsoid Method for Sylvester's Problem and its Generalization

Кібернетика та комп'ютерні технології
Sylvester's problem or the problem of the smallest bounding circle is the problem of constructing a circle of the smallest radius that contains a finite set of points on the plane.
Petro Stetsyuk, Olha Khomiak, Oleksander Davydov   +2 more
doaj   +1 more source