Wave component analysis of energy flow in complex structures – Part III: two coupled plates

2005 ◽  
Vol 285 (1-2) ◽  
pp. 251-265 ◽  
Author(s):  
E.C.N. Wester ◽  
B.R. Mace
Keyword(s):  
Energy Flow ◽  
Component Analysis ◽  
Complex Structures ◽  
Wave Component ◽  
Coupled Plates

scholarly journals Coupling strength assumption in statistical energy analysis

2017 ◽  
Vol 473 (2200) ◽  
pp. 20160927 ◽  
Author(s):  
T. Lafont ◽  
N. Totaro ◽  
A. Le Bot
Keyword(s):  
Coupling Strength ◽  
Energy Flow ◽  
Energy Analysis ◽  
Flow Direction ◽  
Statistical Energy Analysis ◽  
Coupling Loss ◽  
Indirect Coupling ◽  
Random Forces ◽  
Statistical Ensembles ◽  
Coupled Plates

This paper is a discussion of the hypothesis of weak coupling in statistical energy analysis (SEA). The examples of coupled oscillators and statistical ensembles of coupled plates excited by broadband random forces are discussed. In each case, a reference calculation is compared with the SEA calculation. First, it is shown that the main SEA relation, the coupling power proportionality, is always valid for two oscillators irrespective of the coupling strength. But the case of three subsystems, consisting of oscillators or ensembles of plates, indicates that the coupling power proportionality fails when the coupling is strong. Strong coupling leads to non-zero indirect coupling loss factors and, sometimes, even to a reversal of the energy flow direction from low to high vibrational temperature.

scholarly journals Circumstantial determinants in the structure of a complex sentencein modern French

2021 ◽  
pp. 24-29
Author(s):  
Сусанна Каплановна Беданокова
Keyword(s):  
Component Analysis ◽  
Practical Significance ◽  
Complex Structures ◽  
Sentence Structure ◽  
Structural Components ◽  
Complex Sentence ◽  
Theoretical Significance ◽  
Special Complex ◽  
Structural Indices

Рассмотрены некоторые особенности функционирования обстоятельственного детерминанта в структуре сложноподчиненного предложения. Теоретическая значимость определяется в поле конструктивного синтаксиса и выявления наиболее устойчивых и частотных признаков функционирования различных структурных компонентов предложения. В результате компонентного анализа намечены основные параметры систематизации особенностей функционирования детерминирующих компонентов в структуре сложного предложения, что формирует практическую значимость проведенного исследования при работе с текстами. Исследование строилось на проведении анализа конструктивных показателей полипредикативных конструкций, связанных характером включения детерминантов в структуру предложения. В результате выявлена специфика семантико-синтаксического взаимодействия детерминанта со структурными компонентами сложного предложения, определены условия, которые могут влиять на типологические свойства при образовании особых сложноподчиненных конструкций. Some peculiarities of functioning of a circumstantial determinant in the structure of a complex sentence are considered. The theoretical significance is determined in the field of constructive syntax and the identification of the most stable and frequency signs of the functioning of various structural components of the sentence. The component analysis made it possible to outline the main parameters of the systematization of the features of the functioning of the determinant components in the structure of the complex sentence, which form the practical significance of the study when working with texts. The study was based on analysis of structural indices of polypredicative constructions related to the nature of inclusion of determinants in the sentence structure. As a result, the specifics of the semantic-syntactic interaction of the determinant with the structural components of the complex sentence were revealed, the conditions that can affect typological properties in the formation of special complex structures have been identified.

Energy Flow Finite Element Analysis of L-Shaped Plate Including Three Types of Waves

2013 ◽  
Vol 353-356 ◽  
pp. 3365-3368 ◽  
Author(s):  
Jun Chuan Niu ◽  
Kun Peng Li
Keyword(s):  
Energy Flow ◽  
Reflection Coefficients ◽  
Governing Equations ◽  
Matrix Assembly ◽  
Element Analysis ◽  
Transmission And Reflection Coefficients ◽  
Special Procedure ◽  
Longitudinal And Shear Waves ◽  
Coupled Plates ◽  
Transmission And Reflection

Bending, longitudinal and shear waves being taken into account, the transmission and reflection coefficients at the junction of the L-shaped plates are investigated. Based on a special procedure to deal with the global matrix assembly, the wave energy governing equations are proposed to calculate the energy density and intensity of the coupled plates to investigate the transmission properties. Some conclusions are obtained by the numerical examples.

Cell morphology, volume, and surface area determinations from multilevel contouring within HVEM micrographs of serial sections and whole-cell mounts

1987 ◽  
Vol 45 ◽  
pp. 588-589
Author(s):  
M. Marko ◽  
A. Leith ◽  
D. Parsons
Keyword(s):  
Surface Area ◽  
Electron Micrographs ◽  
Cell Morphology ◽  
Individual Variation ◽  
Serial Section ◽  
Stereo Pair ◽  
Complex Structures ◽  
Serial Sections ◽  
Surface Areas ◽  
Computer Based

The use of serial sections and computer-based 3-D reconstruction techniques affords an opportunity not only to visualize the shape and distribution of the structures being studied, but also to determine their volumes and surface areas. Up until now, this has been done using serial ultrathin sections.The serial-section approach differs from the stereo logical methods of Weibel in that it is based on the Information from a set of single, complete cells (or organelles) rather than on a random 2-dimensional sampling of a population of cells. Because of this, it can more easily provide absolute values of volume and surface area, especially for highly-complex structures. It also allows study of individual variation among the cells, and study of structures which occur only infrequently.We have developed a system for 3-D reconstruction of objects from stereo-pair electron micrographs of thick specimens.

Stereo modeling of HVEM specimens by serial tilting and computer graphics

1986 ◽  
Vol 44 ◽  
pp. 34-35
Author(s):  
J.R. McIntosh ◽  
D.L. Stemple ◽  
William Bishop ◽  
G.W. Hannaway
Keyword(s):  
Computer Graphics ◽  
Analytical Methods ◽  
Photographic Film ◽  
Complex Structures ◽  
Multiple Objects ◽  
Multiple Images ◽  
3 Dimensional

EM specimens often contain 3-dimensional information that is lost during micrography on a single photographic film. Two images of one specimen at appropriate orientations give a stereo view, but complex structures composed of multiple objects of graded density that superimpose in each projection are often difficult to decipher in stereo. Several analytical methods for 3-D reconstruction from multiple images of a serially tilted specimen are available, but they are all time-consuming and computationally intense.

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