scholarly journals A new discrete dynamic model of ABA-induced stomatal closure predicts key feedback loops

PLoS Biology ◽  
2017 ◽  
Vol 15 (9) ◽  
pp. e2003451 ◽  
Author(s):  
Réka Albert ◽  
Biswa R. Acharya ◽  
Byeong Wook Jeon ◽  
Jorge G. T. Zañudo ◽  
Mengmeng Zhu ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Stomatal Closure ◽  
Feedback Loops ◽  
Discrete Dynamic ◽  
Discrete Dynamic Model

scholarly journals Simulation and Formation Mechanisms of Urban Landscape Design Based on Discrete Dynamic Models Driven by Big Data

2022 ◽  
Vol 2022 ◽  
pp. 1-9
Author(s):  
Ke Cao ◽  
Jing Xiao ◽  
Yan Wu
Keyword(s):  
Big Data ◽  
Dynamic Model ◽  
Dynamic Models ◽  
Urban Landscape ◽  
Landscape Design ◽  
Data Driven ◽  
Interactive Methods ◽  
Formation Mechanisms ◽  
Discrete Dynamic ◽  
Discrete Dynamic Model

Urban landscape design as a contemporary art embodies postmodernist philosophical thinking, aesthetic thinking, and breaking the traditional concept of art, and it is a new way of creating and presenting art. Big data technology characterized by large scale, speed, variety, value, and uncertainty of data is used to achieve urban landscape design. In this article, during the research process, we strive to raise the revelation of the design layer rather than the brand new level of cross-fertilization and interaction between big data-driven discrete dynamic model and urban landscape design; we also reveal how the benefits of promoting urban development and harmonious life are achieved in the interactive expression of the urban landscape after the application of the big data-driven discrete dynamic model, which provides designers and related professionals with more detailed and novel design ideas at the theoretical level and makes the theory of big data-driven discrete dynamic models in landscape design interactive methods more enriched. Finally, this article puts forward its thinking and outlook on the design of the big data-driven discrete dynamic model in the interactivity of urban landscape design, hoping that artists will strengthen its functional and material design elements when creating performance. Moreover, more design means of emerging technologies of modern science and technology should be integrated so that modern urban landscape can achieve ordinary and uncommon benefits and promote the rapid development of the big data-driven discrete dynamic model in urban landscape design development.

Rigid-Flexible Coupling Dynamic Modeling and Vibration Control for a Three-Axis Stabilized Spacecraft

2017 ◽  
Vol 139 (4) ◽  
Author(s):  
Lun Liu ◽  
Dengqing Cao ◽  
Jin Wei ◽  
Xiaojun Tan ◽  
Tianhu Yu
Keyword(s):  
Boundary Conditions ◽  
Dynamic Analysis ◽  
Dynamic Model ◽  
Equations Of Motion ◽  
Rigid Motion ◽  
Attitude Motion ◽  
Flexible Coupling ◽  
Assumed Mode Method ◽  
Discrete Dynamic ◽  
Discrete Dynamic Model

An approach is proposed to obtain the global analytical modes (GAMs) and establish discrete dynamic model with low degree-of-freedom for a three-axis attitude stabilized spacecraft installed with a pair of solar arrays. The flexible spacecraft is simplified as a hub–plate system which is a typical rigid-flexible coupling system. The governing equations of motion and the corresponding boundary conditions are derived by using the Hamiltonian principle. Describing the rigid motion and elastic vibration of all the system components with a uniform set of generalized coordinates, the system GAMs are solved from those dynamic equations and boundary conditions, which are used to discretize the equations of motion. For comparison, another discrete model is also derived using assumed mode method (AMM). Using ansys software, a finite element model is established to verify the GAM and AMM models. Subsequently, the system global modes are investigated using the GAM approach. Further, the performance of GAM model in dynamic analysis and cooperative control for attitude motion and solar panel vibration is assessed by comparing with AMM model. The discrete dynamic model based on GAMs has the capability to carry out spacecraft dynamic analysis in the same accuracy as a high-dimensional AMM model. The controller based on GAM model can suppress the oscillation of solar panels and make the control torque stable in much shorter time.

ESTIMATION OF INTERIOR TEMPERATURE OF AN ELECTRIC OVEN

2021 ◽  
Vol 5 (2) ◽  
pp. 1-6
Author(s):  
Peter Ogwola ◽  
Muhammad Bello Sullayman
Keyword(s):  
Dynamic Model ◽  
Kalman Filtering ◽  
Order Difference ◽  
First Order ◽  
Discrete Dynamic ◽  
Proportionality Constant ◽  
Discrete Dynamic Model ◽  
Electric Oven ◽  
Order Difference Equation ◽  
Filtering Technique

This paper is aimed at estimating interior temperature of an electric oven with respect to the jacket temperature. A discrete dynamic model of first order difference equation is described for the system. Kalman filtering technique is applied to the discrete dynamic model for estimation of the interior temperature. A computer program is written to simulate the system. It was observed that the estimates of the interior temperatures are directly proportional to estimates of the Jacket temperatures with proportionality constant of 0.0009. With this method it is therefore possible to obtain the interior temperature of the electric oven at any given time.

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