Results 51 to 60 of about 4,477 (306)

A Feasible Trust-Region Sequential Quadratic Programming Algorithm [PDF]

SIAM Journal on Optimization, 2004
Summary: An algorithm for smooth nonlinear constrained optimization problems is described, in which a sequence of feasible iterates is generated by solving a trust-region sequential quadratic programming (SQP) subproblem at each iteration and by perturbing the resulting step to retain feasibility of each iterate. By retaining feasibility, the algorithm
Wright, Stephen J., Tenny, Matthew J.
openaire   +2 more sources

Logspace Sequential Quadratic Programming for Design Optimization [PDF]

AIAA Journal, 2022
A novel approach to exploiting the log-convex structure present in many design problems is developed by modifying the classical Sequential Quadratic Programming (SQP) algorithm. The modified algorithm, Logspace Sequential Quadratic Programming (LSQP), inherits some of the computational efficiency exhibited by log-convex methods such as Geometric ...
openaire   +2 more sources

Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light

Advanced Functional Materials, EarlyView.
A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid, Demeng Feng, Pournima Narayanan, Justin S. Edwards, Manchen Hu, Emma Belliveau, Minjeong Kim, Shenwei Yin, Sanket Deshpande, Chenghao Wan, Linda Pucurimay, David A. Czaplewski, Daniel N. Congreve, Mikhail A. Kats   +13 more
wiley   +1 more source

The Design of a New Type of Remotely Operated Vehicle System and the Realization of a Thrust Distribution Method

Applied Sciences
In order to realize the detection of marine engineering facilities, the hardware system of a new type of remotely operated vehicle (ROV) is designed independently, and the control system, including the lower computer program and the upper computer ...
Fushen Ren, Xin Guo, Xin Deng, Baojin Wang, Zhongyang Wang   +4 more
doaj   +1 more source

Optimization of an Absorption-Based Biogas Upgrading and Liquefaction Process

Chemical Engineering Transactions, 2019
The present work proposes a methodology for optimization of a liquefied biomethane (LBM) production plant. The LBM production plant comprises amine-based absorption upgrading followed by a single expander refrigeration cycle.
Sayed Ebrahim Hashemi, Kristian M. Lien, Sondre K. Schnell, Bjorn Austbo   +3 more
doaj   +1 more source

Exploiting Two‐Photon Lithography, Deposition, and Processing to Realize Complex 3D Magnetic Nanostructures

Advanced Functional Materials, EarlyView.
Two‐photon lithography (TPL) enables 3D magnetic nanostructures with unmatched freedom in geometry and material choice. Advances in voxel control, deposition, and functionalization open pathways to artificial spin ices, racetracks, microrobots, and a number of additional technological applications.
Joseph Askey, Arjen van den Berg, Sandra Ruiz Gomez, Claire Donnelly, Dirk Grundler, Sam Ladak   +5 more
wiley   +1 more source

Design and Implementation of a Reduced-Space SQP Solver with Column Reordering for Large-Scale Process Optimization

Algorithms
Process industries increasingly face large-scale nonlinear programs with high dimensionality and tight constraints. This study reports on the design and implementation of a reduced-space sequential quadratic programming (RSQP) solver for such settings ...
Chuanlei Zhao, Ao Liu, Aipeng Jiang, Xiaoqing Zheng, Haokun Wang, Rui Zhao   +5 more
doaj   +1 more source

Optimal Reactive Power Flow ( Orpf ) Program for Voltage Profile Enhancement and Loss Minimization [PDF]

Engineering and Technology Journal, 2005
The aim of this paper is to introduce a new technique to control the voltage and reactive power in power systems based on constrained optimization techniques introduced in MATLAB optimization toolbox .
Qais Alias, N. Selman
doaj   +1 more source

Unveiling Aggregation‐Induced Singlet Fission in Push–Pull Diketopyrrolopyrrole Water Dispersed Nanoaggregates and Thin Films

Advanced Functional Materials, EarlyView.
Aggregates of diketopyrrolopyrrole dipolar and quadrupolar systems exhibit panchromatic absorption spectra extending in the entire visible range. Upon aggregation in water and in the solid state, their fluorescence is almost completely quenched and their singlet excited state lifetime is significantly shortened.
Roberto Cantoni, Martina Alebardi, Eliana Maria D'Amato, Charu Popli, Yuvraj Patil, Pietro Mancini, Alessandro Di Michele, Anna Spalletti, Rajneesh Misra, Theodore Goodson, Benedetta Carlotti   +10 more
wiley   +1 more source

Temperature uniformity optimization with power-frequency coordinated variation in multi-source microwave based on sequential quadratic programming

High Temperature Materials and Processes, 2023
The focus of this study is to regulate the variation in the input parameters of multiple microwave sources in a high-frequency multimode resonant heating system to achieve uniform heating.
Yang Biao, Han Zemin, Cheng Cheng, Gao Hao, Wu Zhaogang   +4 more
doaj   +1 more source