Mingkai Sun^1,*, Yanan Wang², Pingwei Jiang¹, Zerong Song³, Zhan Gao⁴, Jiaming Xu⁵

Journal of Renewable Materials, Vol.11, No.2, pp. 643-668, 2023, DOI:10.32604/jrm.2022.022168

Abstract A composite rubber concrete (CRC) was designed by combining waste tire rubber particles with particle sizes of 3~5 mm, 1~3 mm and 20 mesh. Taking the rubber content of different particle sizes as the influencing factors, the range and variance analysis of the mechanical and impermeability properties of CRC was carried out by orthogonal test. Through analysis, it is concluded that the optimal proportion of 3~5 mm, 1~3 mm, and 20 mesh particle size composite rubber is 1:2.5:5. 5 kinds of CRC and 3 kinds of ordinary single-mixed rubber concrete (RC) with a total content of 10%~20% were designed under… More >

Xuying Guo^1,*, Guoliang Jiang², Saiou Fu³, Zhiyong Hu³, Junzhen Di², Yanrong Dong², Ying Li⁴

Journal of Renewable Materials, Vol.9, No.11, pp. 2015-2032, 2021, DOI:10.32604/jrm.2021.015878

Abstract To solve the problems of high Cr⁶⁺, Cr³⁺, SO₄^2– and H⁺ concentrations, pollution and processing costs associated with agate dyeing industrial drainage, we prepared an immobilized gel mixture for the treatment of such drainage on the basis of microbial immobilization technology. The immobilized gel mixture was composed of sulfate-reducing bacteria (SRB), corn cob, and nano-Fe₃O₄ (nFe₃O₄). We used a single-factor experiment to determine the optimal dose of each matrix component. We analyzed the mechanism underlying the treatment of agate dyeing wastewater with an immobilized gel mixture by X-ray diffraction and scanning electron microscopy detection. The results of the single-factor test… More >

Taidong Xu^1,2, Hao Liu², Dejun Zhang^1,2, Yadong Li², Xiaoming Zhou^2,*

FDMP-Fluid Dynamics & Materials Processing, Vol.17, No.1, pp. 109-121, 2021, DOI:10.32604/fdmp.2021.010608

Abstract With the progressive increase in the number of transistors that can be accommodated on a single integrated circuit, new strategies are needed to extract heat from these devices in an efficient way. In this regard methods based on the combination of the so-called “jet impingement” and “micro-channel” approaches seem extremely promising for possible improvement and future applications in electronics as well as the aerospace and biomedical fields. In this paper, a hybrid heat sink based on these two technologies is analysed in the frame of an integrated model. Dedicated CFD simulation of the coupled flow/temperature fields and orthogonal tests are… More >

Kuipeng Li^1,2, Hua Han¹, Yunhui Xie¹, Xiaomei Sun^1,*

Phyton-International Journal of Experimental Botany, Vol.90, No.2, pp. 583-593, 2021, DOI:10.32604/phyton.2021.013912

Abstract Optimization of in vitro adventitious root induction contributes to the development of a large-scale production system of hybrid clone seedlings of larch (Larix spp.). We used orthogonal testing to investigate the factors that affect the rooting of hybrid larch shoots–activated carbon, vitamin B1, sucrose, glycine, glutamic acid (Glu), cysteine, pH, and induction time in the dark and indole-3-butyric acid (IBA). Variance analysis showed that the effects of sucrose concentration on rooting rate, survival rate, and average root number, pH on the average number of roots; and Glu on survival rate were all significant (p < 0.05) when compared to the… More >

Liu Cao^*

CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.1, pp. 5-23, 2021, DOI:10.32604/cmes.2021.014693

Abstract As a typical laser additive manufacturing technology, laser powder bed fusion (LPBF) has achieved demonstration applications in aerospace, biomedical and other fields. However, how to select process parameters quickly and reasonably is still the main concern of LPBF production. In order to quantitatively analyze the inuence of different process parameters (laser power, scanning speed, hatch space and layer thickness) on the LPBF process, the multi-layer and multi-path forming process of LPBF was predicted based on the open-source discrete element method framework Yade and the open-source finite volume method framework OpenFOAM. Based on the design of experiments method, a four-factor three-level… More >

Yang Liu¹, Jianjun Xie^1,*, Peng Hao¹, Ying Shi¹, Yonggen Xu^2,3, Xiaoqing Ding^2,3

Journal of Renewable Materials, Vol.9, No.2, pp. 237-253, 2021, DOI:10.32604/jrm.2021.012228

Abstract Foam glass is a new green material to make use of waste glass and is popular for its energy-saving and light weight features. The problems in the current study of foam glass is that its properties require improvement to match the growing demands of application specific standards. Properties of foam glass is related to its porous structure, which is affected by various factors. The influence of raw material component, foaming agents and sintering system on the porous structure and properties of foamed glass is studied. Density decreases with the decrease of quartz and barite content. Thermal conductivity is more affected… More >

Yuan Min^1,†, Xu Fengxiang^2,3,*, Wu Junhao¹, Zheng Xuefeng¹

Computer Systems Science and Engineering, Vol.35, No.3, pp. 173-181, 2020, DOI:10.32604/csse.2020.35.173

Abstract This paper studies the influence of different factors on pedestrian head injury in vehicle-pedestrian collisions. PC-Crash software is used to construct simulation experiments under ten factors. The research shows that the injury to pedestrians in reverse impact is greater than that to pedestrians in forward impact. With the acceleration of vehicle speed, the HIC value of pedestrians will increase with the increase of the height of the front hood from the ground. When the vehicle speed is less than 40 km/h, the injury to pedestrians in a forward-leaning emergency posture is smaller, and the injury to a standing emergency posture… More >

Peng Tian¹, Jun Huang¹, Weidong Shi^1,2,*, Ling Zhou¹

FDMP-Fluid Dynamics & Materials Processing, Vol.15, No.2, pp. 139-151, 2019, DOI:10.32604/fdmp.2019.05216

Abstract A prototype centrifugal pump with a specific speed of 110 is used to investigate and optimize the performances of a turbine for power generation. Particular attention is given to the design of the internal impeller. The internal flow field is simulated in the framework of a commercial computational fluid dynamics software (ANSYS). Four geometrical parameters of the impeller are considered, i.e., the inlet diameter, the inlet width, the blade number, and the blade angle. The optimization is carried out on the basis of a three-level approach relying on an orthogonal test method. The results of the numerical simulations show good… More >