1,735,975 research outputs found
Koopman-SPCL
No full text的动态演化规律PM2.5并准确预测，对于公共卫生管理和预警决策活动的实施具有重要意义。本研究利用Koopman算子的谱特性来解释复数PM2.5的内在演化规律并利用深度学习实现从非线性状态空间到Koopman不变子空间的映射，以考虑直线距离PM2.5关系状态空间转换期间的站点。本研究揭示了PM2.5不同尺度上呈现出时空变化规律，对本文具有重要意义。该研究还阐明PM2.5 复杂非线性动力系统解释性质。</p
Clover Koopman Radio Broadcast, March 1988
No full textClover Koopman introduces her oral history project, War of Words and Music: Veterans Remember “Tokyo Rose”, and provides background on “Tokyo Rose” and Iva Toguri—the voice behind Tokyo Rose. Using clips from Tokyo Rose broadcasts, interviews with World War Two veterans and historians, Koopman provides background and context to Tokyo Rose’s broadcasts, and their effects on servicemen.https://scholarworks.umt.edu/tokyorose_interviews/1007/thumbnail.jp
Harry Lyman Koopman Correspondence
No full textEntries include typed and handwritten letters on the Library of Brown University and Providence Journal stationery, correspondence with Koopman concerning Elizabeth Akers Allen about whom Koopman had written a biographical editorial, the newspaper clipping of the editorial, and a photographic portrait of Koopman
Koopman Operator for Nonlinear Flight Dynamics
No full textDynamical systems representing vehicle flight are inherently nonlinear. Currently there are no generalised frameworks for explicit characterisation and solution of such systems. Conversely, linear systems are well understood, and many efficient algorithms are available for explicit characterisation and prediction.
Koopman operator theory presents a framework for constructing finite linear approximations to nonlinear systems, by projecting the nonlinear dynamics onto a Hilbert space constructed of Koopman operator eigenfunctions. This work summarises the theory underpinning the Galerkin method of constructing Koopman linear approximations of known dynamics using polynomial basis functions. Details of a system-agnostic program for computing the Koopman linear matrix is presented.
Linear approximations are constructed for two nonlinear systems: a simple Duffing oscillator, and a three degree-of-freedom glider trajectory. The ability of linear systems to closely follow the time-integrated nonlinear solution is demonstrated. Furthermore, expansions of the lifted linear model to incorporate variable system parameter, to incorporate bilinear time-varying inputs necessary for optimal control calculations, as well as methods to avoid the inherent linear system limitations are explored.
This work demonstrates feasibility and merit of the lifted linear system approach for analysis of vehicle dynamics and trajectory problems
Robust tube-based model predictive control with Koopman operators
No full textKoopman operators are of infinite dimension and capture the characteristics of nonlinear dynamics in a lifted global linear manner. The finite data-driven approximation of Koopman operators results in a class of linear predictors, useful for formulating linear model predictive control (MPC) of nonlinear dynamical systems with reduced computational complexity. However, the robustness of the closed-loop Koopman MPC under modeling approximation errors and possible exogenous disturbances is still a crucial issue to be resolved. Aiming at the above problem, this paper presents a robust tube-based MPC solution with Koopman operators, i.e., r-KMPC, for nonlinear discrete-time dynamical systems with additive disturbances. The proposed controller is composed of a nominal MPC using a lifted Koopman model and an off-line nonlinear feedback policy. The proposed approach does not assume the convergence of the approximated Koopman operator, which allows using a Koopman model with a limited order for controller design. Fundamental properties, e.g., stabilizability, observability, of the Koopman model are derived under standard assumptions with which, the closed-loop robustness and nominal point-wise convergence are proven. Simulated examples are illustrated to verify the effectiveness of the proposed approach.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Robot Dynamic
From Foucauldian Biopower to Energopower and Infopower:An Interview with Dominic Boyer and Colin Koopman
No full textKirsten Hasberg talks to Dominic Boyer, anthropologist and author of Energopolitics: Wind and Power in the Anthroprocene, and to Colin Koopman, philosopher and author of How We Became our Data: A Genealogy of the Informational Person. Their books published in mid-2019 put forward novel conceptualizations of Foucauldian biopower, which they term infopower and energopower, respectively. Criss-crossing between philosophical conceptualizations and concrete problems like the struggles of renewable energy communities (Boyer) and the influence of economic thinking on datafication (Koopman), the conversations show how Foucauldian concepts are relevant to today's power struggles inherent to the energy transition and the digital transformation.Kirsten Hasberg talks to Dominic Boyer, anthropologist and author of Energopolitics: Wind and Power in the Anthroprocene, and to Colin Koopman, philosopher and author of How We Became our Data: A Genealogy of the Informational Person. Their books published in mid-2019 put forward novel conceptualizations of Foucauldian biopower, which they term infopower and energopower, respectively. Criss-crossing between philosophical conceptualizations and concrete problems like the struggles of renewable energy communities (Boyer) and the influence of economic thinking on datafication (Koopman), the conversations show how Foucauldian concepts are relevant to today's power struggles inherent to the energy transition and the digital transformation
From Voc_Pl_01 Can be bare? (https://www.terraling.com/groups/7/properties/517) to Voc_Sg_05 Must have a special vocative marker? (https://www.terraling.com/groups/7/properties/510): 15 properties.
No full textSSWL is a searchable database that allows users to discover which properties (morphological, syntactic, and semantic) characterize a language, as well as how these properties relate across languages. This system is designed to be free to the public and open-ended. Anyone can use the database to perform queries
From N3 01_Dem A N (https://www.terraling.com/groups/7/properties/398) to N3 12_Num N Dem (https://www.terraling.com/groups/7/properties/432): 12 properties.
No full textSSWL is a searchable database that allows users to discover which properties (morphological, syntactic, and semantic) characterize a language, as well as how these properties relate across languages. This system is designed to be free to the public and open-ended. Anyone can use the database to perform queries
From S01_Existential constructions (https://www.terraling.com/groups/7/properties/728) to S 04 3_Indef Pl Ns (Subj) must have an article (https://www.terraling.com/groups/7/properties/741): 15 properties.
No full textSSWL is a searchable database that allows users to discover which properties (morphological, syntactic, and semantic) characterize a language, as well as how these properties relate across languages. This system is designed to be free to the public and open-ended. Anyone can use the database to perform queries
From O 01 1_Indef mass_can be bare (https://www.terraling.com/groups/7/properties/467) to O 09 5_PN+A_Order PN A (https://www.terraling.com/groups/7/properties/500): 40 properties.
No full textSSWL is a searchable database that allows users to discover which properties (morphological, syntactic, and semantic) characterize a language, as well as how these properties relate across languages. This system is designed to be free to the public and open-ended. Anyone can use the database to perform queries
- …
