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- 저자 : Pengju Wang (검색결과 5 건)
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Hao Wang,Liang Wang,Wenfeng Shen,Ke Cao,Lei Sun,Pengju Wang,Liyun Cui 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.2
Recycled concrete powder (RCP) recycling can reduce the consumption of natural resources, which has been highlighted as an ecofriendly and sustainable approach. The alkali-activated slag (AAS) offers notable prospects for replacing conventional Portland cement binders. In this study, we partially replaced granulated blast furnace slag (GBFS) with RCP to prepare the AAS mortars. We evaluated the effect of RCP replacement levels and fineness levels on compressive strength, early hydration process, and pore structure pertaining to AAS mortars with RCP (RCP-AAS mortars). According to the experimental results, using 10 – 30% RCP inside AAS mortars enhanced the compressive strength at 1 day, and the improvement was obvious with increasing RCP fineness. The RCP delayed the early-age hydration of the GBFS, decreased the content of hydration products and increased the total porosity. Therefore, it exhibited a negative effect on 28-day compressive strength. These drawbacks of RCP, however, could be modified by increasing its fineness.
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Dual-anchor anti-corrosion coating of copper foil for high-speed interconnects
Huijuan Shi,Guoyun Zhou,Qin Zhang,Pengju Wang,Yan Hong,Wei He,Shouxu Wang,Chong Wang,Zhiwei Han 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.126 No.-
In this experiment, two similar molecules with bifunctional groups have been characterized to prove theadvantages of dual-anchor molecular coating in the interfacial modification of the copper foil. The physicochemicalproperties of the modified copper foils have been studied. The obtained results indicate thatthe anti-corrosion performance and peeling strength were significantly improved for the copper foil treatedwith (2-(Methylthio)pyrimidin-4-yl)methanamine (MET), whose bonding information was analyzedvia the density functional theory calculation. It was found that the S-Cu and N-Cu bonds were bothformed on the Cu (1 1 1) surface for MET coating, and the adsorption of the double anchor pointsimproves the stability of the interface. The peeling test exhibits the function of MET coating as the adhesionpromotor between low-surface profile copper and resin for high-speed signal transmission.
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Mechanical Properties and Microstructure of Sulfur Polymer Composite Containing Basalt Fibers
Bingang Wang,Ju Zhang,Changwang Yan,Jie Li,Pengju Li 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.12
The paper aims to investigate the mechanical properties and microstructure of sulfur polymer composite (SPC) containing basalt fiber (BF). The compressive strength fc, splitting tensile strength ft, and flexural strength ff of SPC were tested at different BF contents of 0-3% and aspect ratios of 353 and 706. Meanwhile, the microstructure characteristics of SPC, i.e., the interfacial transition zone (ITZ) structure of SPC, bonding of BF with SPC, pore size distribution, and porosity, were analyzed. The results indicated that the inclusion of BF lowed the compressive strength of SPC; for SPC at a given BF content, the fc with 706 l/d was lower than that with 353 l/d. Meanwhile, the ft and ff of SPC with 353 l/d increased with BF content; for l/d of 706, the ft and ff increased with BF content before 2.5% then decreased with the increase in BF content; compared to 353 l/d, 706 l/d was more effective to improve the ft and ff of SPC. Additionally, an appropriate amount of BF was beneficial to improve the ITZ structure of SPC and bonding performance between BF and the matrix, and the porosity and pore size of SPC increased with BF content and l/d.
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Forward Matching Fusion Algorithm for PDR based on Geomagnetic Fingerprint Map
Yuke Li,Pengju Wang,Tong Li,Yinxuan Liu,Shigeyuki Tateno 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11
Aiming at the problem that indoor positioning using pedestrian dead reckoning (PDR) algorithm will lead to error accumulation and the precision of built-in sensors of smartphones is not high enough, indoor positioning research based on the fusion of geomagnetic positioning and PDR positioning algorithm is proposed. A Kriging interpolation based fusion matching algorithm was used to construct geomagnetic fingerprint map to reduce the time spent in data sampling. The fusion positioning is realized by combining the PDR positioning with the hybrid matching algorithm of lattice matching and sequence matching. The improved algorithm solves the problems of global search for geomagnetic sequence matching and PDR positioning error accumulation in traditional methods, improves the positioning accuracy and solves the problems that through the wall or even out of the map caused by the error accumulation. Experimental results show that the maximum positioning error of the proposed algorithm is less than 1m in the complex movement of 120 steps for 60m. The probability of positioning accuracy less than 0.5m is 85%. This can meet the needs of ordinary indoor positioning.
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Hao, Xiaoyan,Wang, Pengju,Ren, Youshe,Liu, Gentang,Zhang, Jianxin,Leury, Brian,Zhang, Chunxiang Asian Australasian Association of Animal Productio 2020 Animal Bioscience Vol.33 No.6
Objective: Astragalus membranaceus root is a well-known traditional Chinese herbal medicine with many biological active constituents. This study was conducted to examine the effects of Astragalus membranaceus root powder (AMP) on growth performance, serum antioxidant and immune response in finishing lambs. Methods: A total of thirty-six Guangling fat-tailed ram lambs (body weight = 19±2 kg, mean±standard deviation) were randomly assigned to one of six treatments for a 40 d feeding period, with the first 10 d for adaptation. Treatments consisted of the lambs' basal diets with addition of 0, 5, 10, 15, 20, and 30 g/kg of diet of AMP. Results: Response to supplementation level of AMP was quadratic (p≤0.032) for final weight and ADG with the greatest at 10 g/kg of diet, but dry matter intake was not affected (p≥0.227) by treatments. The increase of AMP supplementation resulted in a quadratic response in contents of triglyceride and creatinine (p<0.05), with the lowest values for 10 and 20 g/kg of diet, respectively. A linear and quadratic decrease was observed in activity of alkaline phosphatase in serum of lambs. As the AMP supplementation increased, the activities of total superoxide dismutase and total antioxidant capacity increased linearly (p≤0.018) and hydroxyl radical (OH<sup>-</sup>) decreased linearly (p = 0.002). For catalase (CAT) and malondialdehyde (MDA), quadratic (p≤0.001) effects were observed among treatments, with the greatest CAT and lowest MDA values at 10 g/kg AMP. Additionally, supplementing AMP up to a level of 10 or 15 g/kg of diet quadratically increased immunoglobulin and interleukin contents in the serum. Conclusion: The results indicated that AMP can be used as natural feed additive in the ration of lambs to improve ADG, antioxidant status, and immune functions, and the optimal dose was 10 g/kg of diet under the condition of this experiment.
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