Load component decomposition and online modelling based on small disturbance response characteristic matching

Abstract Unidirectional cord-rubber specimens in the form of tensile coupons and sandwich beams were used. Using specimens with the cords oriented at 0°, 45°, and 90° to the loading direction and appropriate data reduction, we were able to obtain complete characterization for the in-plane stress-strain response of single-ply, unidirectional cord-rubber composites. All strains were measured by means of liquid mercury strain gages, for which the nonlinear strain response characteristic was obtained by calibration. Stress-strain data were obtained for the cases of both cord tension and cord compression. Materials investigated were aramid-rubber, polyester-rubber, and steel-rubber.

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Correction: Wing Flutter Prediction by a Small-Disturbance Euler (SD-Euler) Method on Body-fitted Curvilinear Grid

2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference ◽

10.2514/6.2018-0951.c1 ◽

2018 ◽

Author(s):

Jieyun Pan ◽

Feng Liu

Keyword(s):

Euler Method ◽

Small Disturbance ◽

Wing Flutter ◽

Curvilinear Grid

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SYNTHESIS OF BROADBAND DISTRIBUTED IMPEDANCE TRANSFORMERS WITH A GIVEN PHASE RESPONSE

Issues of radio electronics ◽

10.21778/2218-5453-2018-4-40-47 ◽

2018 ◽

pp. 40-47

Author(s):

D. I. Volkhin ◽

G. N. Devyatkov

Keyword(s):

Transmission Lines ◽

Conversion Coefficient ◽

Power Conversion ◽

Response Characteristic ◽

Second Order ◽

Phase Response ◽

Synthesis Process ◽

New Class ◽

Broadband Matching ◽

Active Impedance

The development of a new class of broadband matching devices, including active impedance transformers, with the possibility of correcting the phase response is an actual task at present. Synthesis of a broadband active impedance transformer with a phase response corresponding to a second-order lattice X-section in a distributed elemental basis based on the previously presented method for the synthesis of broadband matching devices with predetermined phase response is considered in this paper. As a result of synthesis, the y-matrix of the broadband transforming two-port network is obtained. The functions of its own parameters represented in the form of Foster. Applying various conditions of circuit realizability in the synthesis process, we obtained structures convenient for realization on microwave on regular transmission lines, one of which is investigated at various parameters of a given phase response. As a result of the research, it is found that the structure has a wide ability to reproduce the phase response of a second-order lattice X-section with different parameters, and also reproduce the linear phase response characteristic while maintaining an acceptable level of the power conversion coefficient in a given frequency band. Thus, the efficiency of the previously proposed method of synthesis of broadband matching devices with predetermined phase response is demonstrated, and also the possibilities of active impedance transformers on regular transmission lines are shown.

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Gaussian Component Decomposition and the Five-Component Profile of Pulsar 1451−68

The Astronomical Journal ◽

10.1086/300549 ◽

1998 ◽

Vol 116 (4) ◽

pp. 1984-1991 ◽

Cited By ~ 22

Author(s):

Xinji Wu ◽

Xueyan Gao ◽

Joanna M. Rankin ◽

Wen Xu ◽

Valerij M. Malofeev

Keyword(s):

Gaussian Component ◽

Component Decomposition

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Complexities of disturbance response in a marine food web

Limnology and Oceanography ◽

10.1002/lno.11790 ◽

2021 ◽

Author(s):

Kristy A. Lewis ◽

Robert R. Christian ◽

Charles W. Martin ◽

Kira L. Allen ◽

Ashley M. McDonald ◽

...

Keyword(s):

Food Web ◽

Marine Food Web ◽

Disturbance Response ◽

Marine Food

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Research on the Performance of Solar Aided Power Generation System Based on Annular Fresnel Solar Concentrator

Energies ◽

10.3390/en14061579 ◽

2021 ◽

Vol 14 (6) ◽

pp. 1579

Author(s):

Heng Zhang ◽

Na Wang ◽

Kai Liang ◽

Yang Liu ◽

Haiping Chen

Keyword(s):

Power Generation ◽

High Efficiency ◽

Low Cost ◽

Economic Index ◽

Partial Replacement ◽

Solar Concentrator ◽

Small Disturbance ◽

Step Size ◽

Water Matrix ◽

Cost Utilization

A solar-aided power generation (SAPG) system effectively promotes the high efficiency and low cost utilization of solar energy. In this paper, the SAPG system is represented by conventional coal-fired units and an annular Fresnel solar concentrator (AFSC) system. The annular Fresnel solar concentrator system is adopted to generate solar steam to replace the extraction steam of the turbine. According to the steam–water matrix equation and improved Flugel formula, the variable conditions simulation and analysis of the thermo-economic index were proposed by Matlab. Furthermore, in order to obtain the range of small disturbance, the method of partial replacement is used, that is, the extraction steam of the turbine is replaced from 0 to 100% with a step size of 20%. In this work, a SAPG system is proposed and its thermo-economic index and small disturbance scope are analyzed. The results show that the SAPG system is energy-saving, and the application scope of small disturbance is related to the quantity of the extraction steam and evaluation index.

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A four-component decomposition of POLSAR image

Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05. ◽

10.1109/igarss.2005.1525809 ◽

2005 ◽

Cited By ~ 2

Author(s):

Y. Yamaguchi ◽

M. Ishido ◽

H. Yamada ◽

T. Moriyama

Keyword(s):

Component Decomposition

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Framework for Reconstruction of Pseudo Quad Polarimetric Imagery from General Compact Polarimetry

Remote Sensing ◽

10.3390/rs13030530 ◽

2021 ◽

Vol 13 (3) ◽

pp. 530

Author(s):

Junjun Yin ◽

Jian Yang

Keyword(s):

Linear Equations ◽

Estimation Method ◽

Data Sets ◽

Reconstruction Procedure ◽

Component Decomposition ◽

Reconstruction Methods ◽

Sar Imagery ◽

Key Aspects ◽

Non Linear Equations ◽

Reconstruction Model

Pseudo quad polarimetric (quad-pol) image reconstruction from the hybrid dual-pol (or compact polarimetric (CP)) synthetic aperture radar (SAR) imagery is a category of important techniques for radar polarimetric applications. There are three key aspects concerned in the literature for the reconstruction methods, i.e., the scattering symmetric assumption, the reconstruction model, and the solving approach of the unknowns. Since CP measurements depend on the CP mode configurations, different reconstruction procedures were designed when the transmit wave varies, which means the reconstruction procedures were not unified. In this study, we propose a unified reconstruction framework for the general CP mode, which is applicable to the mode with an arbitrary transmitted ellipse wave. The unified reconstruction procedure is based on the formalized CP descriptors. The general CP symmetric scattering model-based three-component decomposition method is also employed to fit the reconstruction model parameter. Finally, a least squares (LS) estimation method, which was proposed for the linear π/4 CP data, is extended for the arbitrary CP mode to estimate the solution of the system of non-linear equations. Validation is carried out based on polarimetric data sets from both RADARSAT-2 (C-band) and ALOS-2/PALSAR (L-band), to compare the performances of reconstruction models, methods, and CP modes.

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Analysis of the intervention effect and self-satisfaction of sports dance exercise on the psychological stress of college students

Work ◽

10.3233/wor-213505 ◽

2021 ◽

pp. 1-13

Author(s):

Changliang Zheng ◽

Hongmei Ji

Keyword(s):

College Students ◽

Stress Response ◽

Psychological Stress ◽

Rating Scale ◽

Response Characteristic ◽

Control Group ◽

Observation Group ◽

Excessive Pressure ◽

Psychological Pressure ◽

The Impact

BACKGROUND: College students are a high-risk subpopulation of psychological disorders. The problem of various adverse phenomena and consequences caused by excessive pressure on college students has gradually become the focus of social and psychological academic circles. However, studies related to individual self-concept and psychological pressure are rare. OBJECTIVE: To explore the impact of sports dance exercises on college students’ psychological pressure and improve the psychological effects of their self-satisfaction. METHODS: College students were taken as research objects, randomly divided into a control group and an observation group. The observation group is intervened with sports dance exercises. The observation group was intervened with sports dance exercises. The stress response characteristic questionnaire and multidimensional self-satisfaction rating scale were utilized to measure college students’ conditions before and after the intervention. Finally, the obtained data were statistically analyzed. RESULTS: Generally, the psychological stress response of college students was mild, with self-satisfaction and various dimensions at a moderately higher level. No significant differences were discovered in the psychological stress response and self-satisfaction level between the control group and the observation group before intervention (P > 0.05), which were homogeneous. Compared with the data obtained before the intervention, after the intervention, the control group scores were slightly reduced in all dimensions of the psychological stress response and self-satisfaction. In contrast, the scores were significantly increased in the experimental group (P < 0.05). Psychological stress response could reliably explain 30.4%of the total self-satisfaction variance (P < 0.01). The negative self-evaluation was the most important variable affecting self-satisfaction, followed by poor interpersonal communication and poor sleeping quality. CONCLUSIONS: Sports dance exercises could alleviate the psychological stress of college students and improve their self-satisfaction. Colleges and universities should include sports dance in the content of optional public courses and encourage more college students to actively participate in sports dance exercises to improve their mental health.

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