Results 251 to 260 of about 3,277,431 (296)

M²B-Net: a lightweight multi-scale multi-attention boundary-aware network for liver tumor segmentation from CT images. [PDF]

Sci Rep
Wang F, Wang H, Liu L, Peng F.
europepmc   +1 more source

Therapeutic Soreness in Manual Therapy for Chronic Neck Pain: A Triphasic Model of Descending Pain Modulation. [PDF]

J Pain Res
Zhang X, Zhang L, Fang M.
europepmc   +1 more source

Performance trade-offs between dense prediction and sparse query mechanisms for brain tumor MRI detection: a comparative study of YOLOv8 and RT-DETR. [PDF]

Front Med (Lausanne)
Xie L, Chen J, Sun Z, Huang Y, Ye S, Ye C.   +5 more
europepmc   +1 more source

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Boundary-Optimal Triangulation Flooding

International Journal of Computational Geometry & Applications, 2004
Given a planar triangulation all of whose faces are initially white, we study the problem of colouring the faces black one by one so that the boundary between black and white faces as well as the number of connected black and white regions are small at all times. We call such a colouring sequence of the triangles a flooding.
Richard J. Nowakowski, Norbert Zeh
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On the Optimal Exercise Boundaries of Swing Put Options [PDF]

Mathematics of Operations Research, 2018
We use probabilistic methods to characterise time-dependent optimal stopping boundaries in a problem of multiple optimal stopping on a finite time horizon. Motivated by financial applications, we consider a payoff of immediate stopping of “put” type, and
Tiziano De Angelis, Yerkin Kitapbayev
exaly   +2 more sources

Constrained mesh optimization on boundary

Engineering with Computers, 2008
This paper presents a new mesh optimization approach aiming to improve the mesh quality on the boundary. The existing mesh untangling and smoothing algorithms (Vachal et al. in J Comput Phys 196: 627–644, 2004; Knupp in J Numer Methods Eng 48: 1165–1185, 2002), which have been proved to work well to interior mesh optimization, are enhanced by adding ...
Jun Yin, Cristian Teodosiu
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Authentic Boundary Proximal Policy Optimization

IEEE Transactions on Cybernetics, 2022
In recent years, the proximal policy optimization (PPO) algorithm has received considerable attention because of its excellent performance in many challenging tasks. However, there is still a large space for theoretical explanation of the mechanism of PPO's horizontal clipping operation, which is a key means to improve the performance of PPO.
Yuhu Cheng 0001, Longyang Huang, Xuesong Wang 0001   +2 more
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A Free Boundary Optimization Problem

SIAM Journal on Mathematical Analysis, 1978
Given a convex set $Q \subset R^2 $ (bounded by a simple closed curve) and a constant $A > 0$, we determine the doubly-connected region $\Omega $ encircling (but not intersecting) Q, with area $| \Omega | \leqq A$, which has the least capacitance.
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Inverse boundary value problems with unknown boundaries: Optimal stability

Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics, 2000
Summary: We obtain essentially best possible stability estimates for a class of inverse problems associated to elliptic boundary value problems in which the role of the unknown is played by an inaccessible part of the boundary and the role of the data is played by overdetermined boundary data for the elliptic equation assigned on the remaining ...
ALESSANDRINI, GIOVANNI, BERETTA E, ROSSET, EDI, VESSELLA S.   +3 more
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