Research of the transfer relationship of the plastic region of the curved bridge based on the auxiliary system method

The destructive fishing feared will give a negative impact on the survival of this organism. This study aims to analyze the density of bivalves, distribution patterns, and to analyze the relationship of bivalves with environmental parameters in Tanjung Pura village. This research was conducted in March 2019. The systematic random system method was used for collecting data of bivalves. The collecting Data retrieval divided into five research stasions. The results obtained 6 types of bivalves from 3 families and the total is 115 individuals. The highest bivalve density is 4.56 ind / m², and the lowest bivalves are located at station 2,1.56 ind / m², The pattern of bivalve distribution in the Coastal of Tanjung Pura Village is grouping. The results of principal component analysis (PCA) showed that Anadara granosa species was positively correlated with TSS r = 0.890, Dosinia contusa, Anomalocardia squamosa, Mererix meretrix, Placamen isabellina, and Tellinella spengleri were positively correlated with currents r = 0.933.

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Multiple Methods to Partition Evapotranspiration in a Maize Field

Journal of Hydrometeorology ◽

10.1175/jhm-d-16-0138.1 ◽

2017 ◽

Vol 18 (1) ◽

pp. 139-149 ◽

Cited By ~ 8

Author(s):

Youjie Wu ◽

Taisheng Du ◽

Risheng Ding ◽

Ling Tong ◽

Sien Li ◽

...

Keyword(s):

Steady State ◽

Growing Season ◽

Chamber System ◽

Multiple Methods ◽

Maize Field ◽

System Method ◽

Flow Through ◽

Relationship Of ◽

Further Development ◽

Isotopic Technique

Abstract Partitioning evapotranspiration (ET) into soil evaporation E and plant transpiration T is important, but it is still a theoretical and technical challenge. The isotopic technique is considered to be an effective method, but it is difficult to quantify the isotopic composition of transpiration δT and evaporation δE directly and continuously; few previous studies determined δT successfully under a non-steady state (NSS). Here, multiple methods were used to partition ET in a maize field and a new flow-through chamber system was refined to provide direct and continuous measurement of δT and δE. An eddy covariance and lysimeter (EC-L)-based method and two isotope-based methods [isotope combined with the Craig–Gordon model (Iso-CG) and isotope using chamber measurement (Iso-M)] were applied to partition ET. Results showed the transpiration fraction FT in Iso-CG was consistent with EC-L at both diurnal and growing season time scales, but FT calculated by Iso-M was less than Iso-CG and EC-L. The chamber system method presented here to determine δT under NSS and isotope steady state (ISS) was robust, but there could be some deviation in measuring δE. The FT varied from 52% to 91%, with a mean of 78% during the entire growing season, and it was well described by a function of LAI, with a nonlinear relationship of FT = 0.71LAI0.14. The results demonstrated the feasibility of the isotope-based chamber system to partition ET. This technique and its further development may enable field ET partitioning accurately and continuously and improve understanding of water cycling through the soil–plant–atmosphere continuum.

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Generalized Outer Synchronization between Complex Networks with Unknown Parameters

Abstract and Applied Analysis ◽

10.1155/2013/802859 ◽

2013 ◽

Vol 2013 ◽

pp. 1-9 ◽

Cited By ~ 4

Author(s):

Di Ning ◽

Xiaoqun Wu ◽

Jun-an Lu ◽

Hui Feng

Keyword(s):

Complex Networks ◽

Real World ◽

Sufficient Criterion ◽

Unknown Parameters ◽

Outer Synchronization ◽

Functional Relations ◽

System Method ◽

Barbalat’S Lemma ◽

Auxiliary System Method ◽

Theoretical Results

As is well known, complex networks are ubiquitous in the real world. One network always behaves differently from but still coexists in balance with others. This phenomenon of harmonious coexistence between different networks can be termed as “generalized outer synchronization (GOS).” This paper investigates GOS between two different complex dynamical networks with unknown parameters according to two different methods. When the exact functional relations between the two networks are previously known, a sufficient criterion for GOS is derived based on Barbalat's lemma. If the functional relations are not known, the auxiliary-system method is employed and a sufficient criterion for GOS is derived. Numerical simulations are further provided to demonstrate the feasibility and effectiveness of the theoretical results.

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Theoretical Bending Collapse of Hat-Section Tubes

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.26.22157 ◽

2018 ◽

Vol 7 (4.26) ◽

pp. 153

Author(s):

Hafizan Hashim ◽

Hanita Hashim ◽

Arif Affendi Jamal ◽

M. A.M. Jusoh

Keyword(s):

Finite Element ◽

Analytical Solution ◽

Plastic Region ◽

Tubular Structures ◽

Pure Bending ◽

Analysis Technique ◽

Collapse Model ◽

The Moment ◽

Relationship Of ◽

Good Agreement

This paper presents an attempt to modify an existing theoretical model to predict the bending collapse response of hat-section tubular structures. The analytical collapse model was based on Kim and Reid. Additional hinge lines created during deformation of the tube were examined and integrated with existing model to forming a modified analytical solution. Variation of the hinge moments were solved using limit analysis technique. Procedure for developing the finite element (FE) models of tube specimens was also presented. Moment-rotation characteristics from pure bending simulation were compared with analytical model and good agreement was achieved. The average of differences between simulation and calculation were found to be <5% within plastic region. In conclusion, the modified analytical solution has adequate capability to predict the moment-rotation relationship of hat-section tubes subject to pure bending..

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