Specifications

loading, through established the microscopic concrete randomly aggregate model, the
load-displacement curves and damage failure diagram of the specimen which under dynamic
load were obtained. A Contrastive study of numerical simulation and CT real-time scanning tests.
The peak intensity of the load-displacement curves as the specimen failure strength was obtained.
Four specimens of the same size, which have the different aggregate position, were carried out
five different rates. The results showed that when the loading rate improving, the concrete
strength was also improving. Loading rate increased to 3 times, at the same time, the peak
intensity increased by about 21%.They were not the same growth of proportion. Meanwhile,
found that different aggregate position under the condition of the same mix proportion had a
certain effect on concrete strength. According to apply different inertial force and elastic
parameters on the specimen, obtained the relationship between the specimen and them.
Number of references: 14
Main heading: Aggregates
Controlled terms: Concretes - Dynamic loads - Load testing
Uncontrolled terms: Dynamic strength - Load-displacement curve - Loading
rate - Peak point - Random aggregate model
Classification code: 406 Highway Engineering - 408.1 Structural Design, General - 412
Concrete - 483.1 Soils and Soil Mechanics
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
8.
Accession number: 20132816491412
Title: Orthogonal spline collocation methods for the subdiffusion equation
Authors: Li, Can1, 2 ; Zhao, Tinggang1 ; Deng, Weihua1 ; Wu, Yujiang1/;;;;
Author affiliation:
1 School of Mathematics and Statistics, Lanzhou University, Lanzhou, Gansu 730000, China
2 Department of Applied Mathematics, School of Science, Xi'An University of Technology, Xi'an,
Shaanxi 710054, China
Corresponding author: Deng, W. ([e-mail])
Source title: Journal of Computational and Applied Mathematics
Abbreviated source title: J. Comput. Appl. Math.
Volume: 255
Issue date: 2014
Publication year: 2014
Pages: 517-528
Language: English
ISSN: 03770427
Document type: Journal article (JA)
Publisher: Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands
Abstract: We develop two kinds of numerical schemes to efficiently solve the subdiffusion
equation, which is used to describe anomalous subdiffusive transport processes. The time
fractional derivative is first discretized by L1-approximation and the Gru¨nwald-Letnikov
approximation, respectively. Then we use the orthogonal spline collocation method to
approximate the two semi-discretized subdiffusion equations. The stability and convergence of