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1,101 results on '"Song, YanYan"'

1. On some path-critical Ramsey numbers

Author

Wang, Ye and Song, Yanyan

Subjects
Mathematics - Combinatorics
Abstract

For graphs $G$ and $H$, the Ramsey number $R(G,H)$ is the smallest $r$ such that any red-blue edge coloring of $K_r$ contains a red $G$ or a blue $H$. The path-critical Ramsey number $R_{\pi}(G,H)$ is the largest $n$ such that any red-blue edge coloring of $K_r \setminus P_{n}$ contains a red $G$ or a blue $H$, where $r=R(G,H)$ and $P_{n}$ is a path of order $n$. In this note, we show a general upper bound for $R_{\pi}(G,H)$, and determine the exact values for some cases of $R_{\pi}(G,H)$.

Published
2024

4. Reconstruction and Practice of Higher Vocational English Classroom Ecosystem Based on AHP Algorithm

Author

Song, Yanyan, Akan, Ozgur, Editorial Board Member, Bellavista, Paolo, Editorial Board Member, Cao, Jiannong, Editorial Board Member, Coulson, Geoffrey, Editorial Board Member, Dressler, Falko, Editorial Board Member, Ferrari, Domenico, Editorial Board Member, Gerla, Mario, Editorial Board Member, Kobayashi, Hisashi, Editorial Board Member, Palazzo, Sergio, Editorial Board Member, Sahni, Sartaj, Editorial Board Member, Shen, Xuemin, Editorial Board Member, Stan, Mircea, Editorial Board Member, Jia, Xiaohua, Editorial Board Member, Zomaya, Albert Y., Editorial Board Member, Zhang, Yinjun, editor, and Shah, Nazir, editor

Published
2024
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19. OntoCA: Ontology-Aware Caching for Distributed Subgraph Matching

Author

Qin, Yuzhou, Wang, Xin, Hao, Wenqi, Liu, Pengkai, Song, Yanyan, Zhang, Qingpeng, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Li, Bohan, editor, Yue, Lin, editor, Tao, Chuanqi, editor, Han, Xuming, editor, Calvanese, Diego, editor, and Amagasa, Toshiyuki, editor

Published
2023
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23. Study on the performance of NiO modified nano-porous Ag electrocatalytic oxidation of sodium borohydride

Author

SONG Yanyan, WANG Chenxing, YANG Pengfei, HU Yongchi, LU Linlin, and LIU Yi

Subjects
borohydride fuel cell, catalyzer, dealloying, electrocatalytic performance, Materials of engineering and construction. Mechanics of materials, TA401-492, Environmental engineering, TA170-171
Abstract

In order to improve the catalytic efficiency of metal catalysts for borohydride fuel cells, three-dimensional nano-porous Ag/NiO composite catalysts were prepared by dealloying method, with Al-Ag and Al-Ag-Ni as precursor alloys. On the premise of reducing the amount of Ag used, the catalyst has significantly improved its performance of electrocatalytic sodium borohydride oxide by virtue of the addition of NiO and its structural advantages. Among them, the nano porous Ag/NiO catalyst obtained after dealloying the precursor alloy Al90Ag9Ni1 has the best performance in the performance test of electrocatalytic oxidation of sodium borohydride, with a peak current density of 158.72 mA· mg-1, and a catalytic performance improvement of 35% compared to the nano porous Ag (116.88 mA· mg-1). This catalyst provides a feasible improvement method for improving the activity of sodium borohydride fuel cell catalysts and reducing costs.

Published
2023
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24. Effect of Direct Extrusion Modification on the Structure and Nutritional Properties of Rice Analogues

Author

ZHANG Ke, WANG Shiguang, SONG Yanyan, LI Peigang, WANG Bing, XUE Wentong

Subjects
screw extrusion, rice analogues, chemical modification, α-amylase, in vitro digestion, Food processing and manufacture, TP368-456
Abstract

In order to improve the small intestinal digestibility of rice analogues (RA) and to enhance the nutritional value of the product, rice and potato flour blends were used as raw materials to prepare RA by direct extrusion modification using chemical or biological modifiers combined with high-temperature puffing. The internal structure and nutritional characteristics of RA were analyzed. The results showed that potato starch and amylase enhanced the digestive resistance of RA. The tested chemical modifiers mainly affected the structure and physicochemical properties of starch, in turn increasing the apparent viscosity and decreasing the degree of hydrolysis and digestibility of RA. Octenylsuccinic anhydride (OSA) played a promoting role in the initial stage of intestinal digestion. Propylene oxide (HPPO) reduced the particle size and increased the storage modulus (G’) of RA. Sodium trimetaphosphate (STMP) increased the particle size and G’ of RA. α-Amylase promoted the decomposition of large particles, led to even distribution of proteins on the surface of particles, and inhibited digestion. High-temperature expansion promoted starch decomposition in the early stage of intestinal digestion. Digestion results showed that the combinatorial effect of extrusion modification and high-temperature puffing weakened the film-forming capability of potato starch, which effectively inhibited the decomposition of the starch and weakened the digestive reaction when it just entered the intestine.

Published
2023
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34. Effect of Pd loading in CNFs / Pd catalyst on electrocatalytic oxidation of methanol

Author

SONG Yanyan, YIN Lei, LIU Yusong, HU Jiajun, LI Ruixiang, WU Yunlong, and LIU Yi

Subjects
cnfs/pd, catalyst, electrocatalytic performance, methanol oxidation, Materials of engineering and construction. Mechanics of materials, TA401-492, Environmental engineering, TA170-171
Abstract

In order to improve the activity of Pd catalyst for methanol catalytic oxidation, carbon fiber cloth was prepared by pre-oxidizing PAN/CA fiber cloth and heat-treated at 1 200 ℃, and the surface was loaded with different content of Pd. The microscopic structure of CNFs/Pd catalyst sample and performance testing were analyzed to find the effect of Pd catalyst. The results showed that the performance of the catalyst for electrocatalytic oxidation of methanol increased firstly and then decreased with the concentration increase of the PdCl2 solution. When the concentration of the PdCl2 solution was 0.02 mol/L, the catalyst performance was the best, and its performance and stability were about 3.3 and 10 times of the commercial Pd/C catalyst. Compared with the commercial catalyst, the activity and stability are both improved.

Published
2022
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42. Right Ventricular Strain Derived from Cardiac MRI Feature Tracking for the Diagnosis and Prognosis of Arrhythmogenic Right Ventricular Cardiomyopathy

Author

Dong, Zhixiang, primary, Dai, Linlin, additional, Song, Yanyan, additional, Ma, Xuan, additional, Wang, Jiaxin, additional, Yu, Shiqin, additional, Yang, Shujuan, additional, Yang, Kai, additional, Zhao, Kankan, additional, Lu, Minjie, additional, Chen, Xiuyu, additional, and Zhao, Shihua, additional

Published
2024
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