Results 41 to 50 of about 253,815 (263)

A New Generalized Fractional-Order Derivative and Bifurcation Analysis of Cholera and Human Immunodeficiency Co-Infection Dynamic Transmission

International Journal of Mathematics and Mathematical Sciences, 2022
In this study, the co-infection of HIV and cholera model has been developed and analyzed. The new fractional-order derivative is applied and the behavior of the solution is interpreted. The order of new generalized fractional-order derivative implication
Kumama Regassa Cheneke, Koya Purnachandra Rao, Gereme Kenassa Edesssa   +2 more
doaj   +1 more source

Derivative-Free Multiobjective Trust Region Descent Method Using Radial Basis Function Surrogate Models

Mathematical and Computational Applications, 2021
We present a local trust region descent algorithm for unconstrained and convexly constrained multiobjective optimization problems. It is targeted at heterogeneous and expensive problems, i.e., problems that have at least one objective function that is ...
Manuel Berkemeier, Sebastian Peitz
doaj   +1 more source

Solving Nonsmooth Equations Using Derivative-Free Methods [PDF]

The Bulletin of Society for Mathematical Services and Standards, 2012
In this paper, a family of derivative-free methods of cubic convergence for solving nonlinear equations is suggested. In the proposed methods, several linear combinations of divided differences are used in order to get a good estimation of the derivative of the given function at the different steps of the iteration.
M.S.M. Bahgat, M.A. Hafiz
openaire   +1 more source

Outcomes and Surgical Management of Malignant Rhabdoid Tumor of the Kidney: A Report From the Pediatric Surgical Oncology Research Collaborative

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Malignant rhabdoid tumor of the kidney (MRTK) is a rare, aggressive tumor seen in young children. The optimal timing of resection for locally advanced tumors is not well‐defined. The purpose of this study is to evaluate modern oncologic outcomes and the impact of surgical timing. Methods A multicenter retrospective review was performed
Hannah N. Rinehardt, Elisabeth T. Tracy, Anghela Paredes, Catherine Beckhorn, Harold J. Leraas, Joseph Fusco, Katlyn G. McKay, Nelly‐Ange T. Kontchou, Zachary J. Kastenberg, David W. Hoyt, Jonathan Roach, Emily K. Myers, Nicholas G. Cost, Bhargava Mullapudi, Charles R. Marchese, Amanda R. Jensen, Timothy B. Lautz, Michela Carter, Roshni Dasgupta, John Lundstedt, Joseph G. Brungardt, Lindsay Talbot, Andrew M. Davidoff, Andrew J. Murphy, Jennifer H. Aldrink, Sara Mansfield, Nelson Piche, Annie Le‐Nguyen, Dave R. Lal, Brian T. Craig, Jennifer M. Schuh, Barrett P. Cromeens, Sindhu Mannava, Shannon Castle, Adriana Lopez, Kelsey Mello, Joshua Short, Robin T. Petroze, Shay Rajaval, Grace R. Thompson, Peter Mattei, David H. Rothstein, Elizabeth Fialkowski, Kathryn Fowler, Nathan Martchenke, Barrie S. Rich, Richard D. Glick, Erin G. Brown, Kathleen Doyle, Paige Abril, Natashia Seemann, Jacob Davidson, Claire A. Wilson, Hau D. Le, Devashish Joshi, Michael Stellon, Tamer Ahmed, Alexandra Dimmer, Peter F. Ehrlich, Maya Hammoud, Keyonna Williams, Christa N. Grant, Merit Gorgy, Stephanie F. Polites, Julia Debertin, Danielle B. Cameron, Alyssa Stetson, Eugene S. Kim, William G. Lee, Aaron Barkhordar, Mary Austin, Brian A. Coakley, Anastasia Kahan, Joseph T. Murphy, Michael Pitonak, Chloé Boehmer, Marcus M. Malek   +76 more
wiley   +1 more source

MYCN Amplification in RB1‐Inactivated Retinoblastoma: Association With High‐Risk Features

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background MYCN amplification occurs in a subset of retinoblastoma cases, both with and without RB1 inactivation. It has been suggested that retinoblastomas with MYCN amplification represent a distinct entity with more aggressive clinical behavior.
Kyriaki Papaioannou, Regina Kubica, Karen Fischhuber, Jasmin Beygo, Madlen Reschke, Petra Ritter‐Sovinz, Eva Biewald, Petra Ketteler, Dietmar Lohmann, Deniz Kanber   +9 more
wiley   +1 more source

Derivative-free neural network for optimizing the scoring functions associated with dynamic programming of pairwise-profile alignment

Algorithms for Molecular Biology, 2018
Background A profile-comparison method with position-specific scoring matrix (PSSM) is among the most accurate alignment methods. Currently, cosine similarity and correlation coefficients are used as scoring functions of dynamic programming to calculate ...
Kazunori D. Yamada
doaj   +1 more source

Revision of a Derivative-Free Quasi-Newton Method [PDF]

Mathematics of Computation, 1978
A derivative-free Quasi-Newton (DFQN) method previously published [J. Greenstadt, Math. Comp., v. 26, 1972, pp. 145-166] has been revised and simplified. The main modification has the effect of keeping all the successive approximants to the Hessian matrix positive-definite.
openaire   +1 more source

Intraoperative Collection of Ascitic Fluid With Intra‐ or Postoperative Reinfusion in Ovarian Cancer: Safety and Feasibility of a Roller Pumping Method

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Patients with ovarian cancer often present with massive ascites, leading to significant protein loss during surgical procedures. Although cell‐free concentrated ascites reinfusion therapy (CART) is used in palliative settings to mitigate protein loss, its application in intraoperative settings remains unexplored.
Yutaka Yoneoka, Tsukuru Amano, Akimasa Takahashi, Mari Deguchi, Hiroyuki Yamanaka, Yuji Tanaka, Shunichiro Tsuji, Takashi Murakami   +7 more
wiley   +1 more source

Adjunctive Therapeutic Plasma Exchange in Refractory Adult‐Onset Still's Disease Complicated by Secondary Macrophage Activation Syndrome: A Single‐Center Experience

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Adult‐onset Still's disease (AOSD) complicated by macrophage activation syndrome (MAS) carries substantial mortality. The role of therapeutic plasma exchange (TPE) remains uncertain. Methods We retrospectively analyzed patients with AOSD‐MAS treated with TPE at a single‐center.
Masataka Ueda, Tomohiro Saito, Masahide Mizobuchi, Tomoki Shimomura, Saki Kawamori, Mitsuru Kawanishi, Natsuko Hattori, Jo Sugiyama, Satoshi Tsubata, Hanami Horiguchi, Kazuki Abe, Nao Iida, Yuki Kajio, Nao Oguro, Ryo Yanai, Hirokazu Honda   +15 more
wiley   +1 more source

About the Performance of a Calculus-Based Approach to Building Model Functions in a Derivative-Free Trust-Region Algorithm

Algorithms, 2023
This paper examines a calculus-based approach to building model functions in a derivative-free algorithm. This calculus-based approach can be used when the objective function considered is defined via more than one blackbox.
Warren Hare, Gabriel Jarry-Bolduc
doaj   +1 more source