Results 71 to 80 of about 4,703 (266)

Chemoselective Aldehyde and Imine Reduction by a Macrocyclic Triazole–Borane Complex Triggered by a Non‐innocent Proton–Hydride Interaction

European Journal of Organic Chemistry, EarlyView.
This work describes the study on a new recyclable reagent, based on a macrocyclic triazole–borane complex. It showed high chemoselectivity for aldehyde reduction and reductive amination over ketones. This selectivity is driven by a noncovalent hydride–proton interaction that stabilizes the transition state for aldehydes but is sterically inhibited in ...
Luca Di Marino, Artur Brotons Rufes, Rosaria Schettini, Giorgio Della Sala, Francesco De Riccardis, Chiara Costabile, Irene Izzo   +6 more
wiley   +1 more source

Primal-dual interior point QP-free algorithm for nonlinear constrained optimization

Journal of Inequalities and Applications, 2017
In this paper, a class of nonlinear constrained optimization problems with both inequality and equality constraints is discussed. Based on a simple and effective penalty parameter and the idea of primal-dual interior point methods, a QP-free algorithm ...
Jinbao Jian, Hanjun Zeng, Guodong Ma, Zhibin Zhu   +3 more
doaj   +1 more source

Hessian equations on exterior domain

Journal of Mathematical Analysis and Applications, 2017
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Cao, Xu, Bao, Jiguang
openaire   +2 more sources

Recent advances in multifunctional soft robots: A materials–structures–systems co‐design perspective for synergistic integration

FlexMat, EarlyView.
Abstract Soft robots, engineered from highly compliant materials, offer superior adaptability and safety in unstructured environments compared to their rigid counterparts. Recent advancements, fueled by bio‐inspiration and material programmability, have led to the rapid co‐evolution of their core modules: actuation, sensing, protection, energy, and ...
Qiulei Liu, Zicao Peng, Chong Sun, Haitao Yang   +3 more
wiley   +1 more source

A Variational Approach to the Quaternionic Hessian Equation

The Journal of Geometric Analysis
In this paper, we introduce finite energy classes of quaternionic $m$-plurisubharmonic functions of Cegrell type and define the quaternionic $m$-Hessian operator on some Cegrell's classes. We use the variational approach to solve the quaternionic $m$-Hessian equation when the right-hand side is a positive Radon measure.
Amal, Hichame, Asserda, Saïd, Barloub, Mohamed   +2 more
openaire   +3 more sources

Bounded solutions of a k-Hessian equation in a ball

Journal of Differential Equations, 2016
We consider the problem \begin{equation}\label{Eq:Abstract} (1)\;\;\;\begin{cases} S_k(D^2u)= λ(1-u)^q &\mbox{in }\;\; B,\\ u <0 & \mbox{in }\;\; B,\\ u=0 &\mbox{on }\partial B, \end{cases} \end{equation} where $B$ denotes the unit ball in $\mathbb{R}^n$, $n>2k$ ($k\in \mathbb{N}$), $λ>0$ and $q > k$.
Sánchez, Justino, Vergara, Vicente
openaire   +3 more sources

When Being Social Is Costly: Empathy's Role for Risk States, Acute Symptoms, and Cumulative Disease Severity of Depression

Journal of Clinical Psychology, EarlyView.
ABSTRACT Objectives Patients with major depressive disorder (MDD) frequently report burdensome interpersonal difficulties and altered empathy and perspective‐taking. Previous findings on binary comparisons between patients and healthy controls are limited in their clinical translation as they neglect dissociable risk and disease states.
Dahna Choi, Paula L. Usemann, Katharina Förster, Roland Zahn, Vincent Hammes, Frederike Stein, Florian Thomas‐Odenthal, Lea Teutenberg, Kira Flinkenflügel, Julia Hubbert, Christoph Jurischka, Judith Krieger, Elisabeth J. Leehr, Susanne Meinert, Tim Hahn, Jonathan Repple, Nils Opel, Hamidreza Jamalabadi, Andreas Jansen, Benjamin Straube, Igor Nenadić, Udo Dannlowski, Tilo Kircher, Nina Alexander, Philipp Kanske   +24 more
wiley   +1 more source

Dynamics and Optimal Harvesting Control for a Stochastic One-Predator-Two-Prey Time Delay System with Jumps

Complexity, 2019
We consider a stochastic one-predator-two-prey harvesting model with time delays and Lévy jumps in this paper. Using the comparison theorem of stochastic differential equations and asymptotic approaches, sufficient conditions for persistence in mean and ...
Tingting Ma, Xinzhu Meng, Zhengbo Chang
doaj   +1 more source

Good Real Perturbations of Simple Corank One Map Germs From R3$\mathbb {R}^3$ to R3$\mathbb {R}^3$

Mathematische Nachrichten, EarlyView.
ABSTRACT The existence of good real perturbations of map germs is one of the most interesting open questions in singularity theory. In this paper, we investigate this question for all simple corank one map germs from R3$\mathbb {R}^3$ to R3$\mathbb {R}^3$, we give a complete description of those that admit a good real perturbation.
A. J. Miranda, M. J. Saia, T. O. Souza
wiley   +1 more source

Kernel Bounds for Parabolic Operators Having First‐Order Degeneracy at the Boundary

Mathematische Nachrichten, EarlyView.
ABSTRACT We study kernel estimates for parabolic problems governed by singular elliptic operators ∑i,j=1N+1qijDij+cDyy,cγ+1>0,γ=qN+1,N+1,$$\begin{equation*} \sum _{i,j=1}^{N+1}q_{ij}D_{ij}+c\frac{D_y}{y},\qquad \frac{c}{\gamma }+1>0, \quad \gamma =q_{N+1,N+1}, \end{equation*}$$in the half‐space R+N+1={(x,y):x∈RN,y>0}$\mathbb {R}^{N+1}_+=\lbrace (x,y ...
L. Negro, C. Spina
wiley   +1 more source