Yu Luo^1,2,3, Mengna Zong^1,2,3, Jin Wang^1,2,3, Xuechun Wang^1,2,3, Bo Bai^1,2,3,*, Chunyu Zhou^1,2,3,*, Junlin Zhu^1,2,3, Jianyu Xing^1,2,3, Moses M. C. Carlon Jr^1,2,3

Journal of Polymer Materials, Vol.41, No.2, pp. 87-103, 2024, DOI:10.32604/jpm.2024.054660 - 09 August 2024

Abstract In this research, we developed a novel photo-stimulation-responsive composite sphere with a semi-interpenetrating polymer network (semi-IPN) structure, synthesized via an alkali gel method, to enhance the efficiency of agrochemicals. Chitosan (CS) serves as the structural matrix and protective shell, with a loading capacity for the plant growth hormone indole-3-butyric acid (IBA) of up to 41.73 μg/mg, effectively controlling the abrupt release of auxin. The incorporation of photothermal detonation nanodiamond (DND) and the photosensitive poly(N-isopropylacrylamide) (PNIPAm) endows the spheres with the ability to respond to light and temperature stimuli, achieving intelligent control over IBA release. Characterization… More >

Chunhui Li^1,*, Hua Jiang²

CMC-Computers, Materials & Continua, Vol.79, No.3, pp. 4491-4512, 2024, DOI:10.32604/cmc.2024.048431 - 20 June 2024

Abstract In the context of enterprise systems, intrusion detection (ID) emerges as a critical element driving the digital transformation of enterprises. With systems spanning various sectors of enterprises geographically dispersed, the necessity for seamless information exchange has surged significantly. The existing cross-domain solutions are challenged by such issues as insufficient security, high communication overhead, and a lack of effective update mechanisms, rendering them less feasible for prolonged application on resource-limited devices. This study proposes a new cross-domain collaboration scheme based on federated chains to streamline the server-side workload. Within this framework, individual nodes solely engage in… More >

Deming Lei^*, Heen Li

CMC-Computers, Materials & Continua, Vol.79, No.2, pp. 1855-1874, 2024, DOI:10.32604/cmc.2024.049480 - 15 May 2024

Abstract This study focuses on the scheduling problem of unrelated parallel batch processing machines (BPM) with release times, a scenario derived from the moulding process in a foundry. In this process, a batch is initially formed, placed in a sandbox, and then the sandbox is positioned on a BPM for moulding. The complexity of the scheduling problem increases due to the consideration of BPM capacity and sandbox volume. To minimize the makespan, a new cooperated imperialist competitive algorithm (CICA) is introduced. In CICA, the number of empires is not a parameter, and four empires are maintained More >

Ying Wang^1,*, Longxiao Chao¹, Jun Chen², Songbai Jiang¹

CMES-Computer Modeling in Engineering & Sciences, Vol.140, No.1, pp. 201-227, 2024, DOI:10.32604/cmes.2024.046129 - 16 April 2024

Abstract In order to investigate the fatigue performance of orthotropic anisotropic steel bridge decks, this study realizes the simulation of the welding process through elastic-plastic finite element theory, thermal-structural sequential coupling, and the birth-death element method. The simulated welding residual stresses are introduced into the multiscale finite element model of the bridge as the initial stress. Furthermore, the study explores the impact of residual stress on crack propagation in the fatigue-vulnerable components of the corroded steel box girder. The results indicate that fatigue cracks at the weld toe of the top deck, the weld root of… More > Graphic Abstract

Verônica Távilla Ferreira Silva, Adriane Maria Ferreira Milagres^*

Journal of Renewable Materials, Vol.12, No.3, pp. 539-551, 2024, DOI:10.32604/jrm.2023.045726 - 11 April 2024

Abstract This study was conducted to evaluate the effectiveness of enzymes in purifying and reducing the degree of polymerization of cellulose for the production of dissolving pulp. Our goal was to determine the contributions of xylanase (X) and endoglucanase (EG) in the treatment of pulp, specifically by quantifying the formation of soluble and insoluble reducing sugars using the dinitrosalycilic acid (DNS) test. Predominantly, the release of soluble reducing sugars (RSSol) was enhanced after xylanase treatment, while endoglucanase (EG) treatment led to changes in insoluble reducing sugars (RSIns). The maximum synergism was observed for RSIns when a… More > Graphic Abstract

Jun Xu¹, Kai Bi¹, Yibin Lu^2,*, Tiantian Wang^2,3, Hang Zhang², Zeyuan Zheng³, Fushan Shi³, Yaxin Zheng³, Xiaoying Li², Jingping Yang³

CMES-Computer Modeling in Engineering & Sciences, Vol.138, No.3, pp. 2727-2748, 2024, DOI:10.32604/cmes.2023.031341 - 15 December 2023

Abstract The spread and removal of pollution sources, namely, cough-released droplets in three different areas (front, middle, and rear areas) of a fully-loaded passenger car in a high-speed train under different fresh air flow volume were studied using computational fluid dynamics (CFD) method. In addition, the structure of indoor flow fields was also analysed. The results show that the large eddies are more stable and flow faster in the air supply under Mode 2 (fresh air volume: 2200 m³/h) compared to Mode 1 (fresh air volume: 1100 m³/h). By analysing the spreading process of droplets sprayed at different locations… More >

Michele Straface¹, Wu Xu^1,*

The International Conference on Computational & Experimental Engineering and Sciences, Vol.27, No.2, pp. 1-1, 2023, DOI:10.32604/icces.2023.09657

Abstract Fracture analysis is a problem playing a fundamental role in the fields of Aerospace Mechanics and Structural Mechanics. The paper deals with the analysis of the most essential among the fracture problems: the one-dimensional crack in a double cantilever beam. The report presents a reliable analytical method to correctly partition the energy release rates into pure fracture modes, appliable to both isotropic and composite beams with clearly known mechanical properties, subject to shearing or bending loads. The adopted strategy is based on the Timoshenko’s kinematic model and exploits the theoretical definition of the I and More >

Liulei Hao¹, Hongjun Yu^1,*, Licheng Guo¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.26, No.2, pp. 1-1, 2023, DOI:10.32604/icces.2023.08918

Abstract To overcome the harsh experimental conditions of determining the mode-II critical energy release rate G_IIC, a flexible experiment-simulation method for determining G_IIC is proposed based on the mixed-mode fracture experiments and the corresponding simulations by the mixed-mode phase-field model. In details, a mixedmode fracture experiment is first conducted to obtain the initial crack deflection angle. Subsequently, a series of phase-field simulations are conducted by altering the value of G_IC/G_IIC to reproduce the experimental result so as to determine the value of G_IIC with a known G_IC. Three mixed-mode fracture tests (single edge cracked circular test, central crack rectangular… More >

Xiaohui Cheng¹, Haiqing Si^1,*, Yao Li¹, Peihong Zhang²

CMES-Computer Modeling in Engineering & Sciences, Vol.136, No.2, pp. 1729-1742, 2023, DOI:10.32604/cmes.2023.022694 - 06 February 2023

Abstract To understand the influence of the initial release conditions on the separation characteristics of the store and improve it under high Mach number (Ma = 4) flight conditions, the overset grid method and the Realizable turbulence model coupled with an equation with six degrees of freedom are used to simulate the store released from the internal bay. The motion trajectory and the attitude angle of the store separation under the conditions of different centroid, velocity, height and control measures are given by the calculated result. Through analysis, the position of the centroid will affect the separation of More >

Yalin Li^1,2,*, Yu Huang², Lei Liu¹, Haozhao Liu¹, Haiyang He¹, Dongxue Lu¹, Tingting Dong¹

Journal of Renewable Materials, Vol.11, No.3, pp. 1237-1253, 2023, DOI:10.32604/jrm.2022.022972 - 31 October 2022

Abstract

In this study, hydrogels were prepared from municipal sludge to recycle and realize the value-added utilization of the carbon components in this abundant waste material. The carbon sources were extracted from the municipal sludge using synthesised nano CaO₂ as an oxidant, and the carbon sources were graft copolymerised with acrylic acid monomer using N, N′-methylenebisacrylamide as a crosslinking agent and ammonium persulfate as an initiator. The factors influencing the hydrogel preparation were investigated by single-factor experiments. Based on the results of the single-factor experiments, a hydrogel with a swelling ratio of up to 19768.4% at 12

… More > Graphic Abstract