Search

Your search keyword '"Lin, Yucheng"' showing total 674 results
Start Over Author "Lin, Yucheng"
674 results on '"Lin, Yucheng"'

66. Semi‐natural habitats benefit maintaining the spider diversity in subtropical agroecosystems.

Author

Geng, Xuewei, Lin, Yucheng, He, Yiting, Liao, Jing, Ran, Jianghong, and Zhang, Pei

Subjects
AGROBIODIVERSITY, AGRICULTURAL ecology, SPIDERS, AGRICULTURE, LAND use, CULTURAL pluralism, SPECIES
Abstract

Land use change has caused the loss of agricultural biodiversity. As major natural enemies of pests in agroecosystems, spiders have important ecological functions in improving agricultural productivity and thus deserve attention. However, few studies have considered their responses to land use changes. Here, we investigated the structure and diversity of the spider community in four land use types, that is, fallow land, woodland, orchard, and cropland in Pengzhou City, China. The differences in species richness, total abundance, community composition, and spider abundances with three foraging strategies and their correlations with environmental factors and agricultural intensity were compared between land use types. The results showed that the total abundance of spiders in fallow land was 71%, 157%, and 214% higher than that in orchard, cropland, and woodland, respectively. Similarly, fallow land maintained the highest species richness. Shannon–Wiener index, community structure heterogeneity, and number of spider species sampled in a single land use type were highest in woodland. Further, spiders with different foraging strategies showed distinctive responses to environmental factors and agricultural practices. The diversity of hunters was negatively correlated with the intensity of agricultural practices and canopy density, while web‐builders were positively correlated with canopy density. The diversity of burrowers was positively correlated with the vertical complexity of vegetation structure. Our study emphasizes the vital role of semi‐natural habitats, like fallow land and woodland, in maintaining spider diversity, and suggests optimizing land uses to provide wide‐open spaces and mitigate the effects of intensified agricultural activities for natural enemies of pests in agriculture. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

67. Intraday high-frequency pairs trading strategies for energy futures: evidence from China.

Author

Luo, Jing, Lin, YuCheng, and Wang, Sijia

Subjects
ENERGY futures, SHARPE ratio, FUTURES market, ORNSTEIN-Uhlenbeck process
Abstract

We investigate the performance of pairs trading strategies based on Ornstein-Uhlenbeck (OU) process with jump-diffusion and regime-switching using minute-level data for five Chinese energy futures from 2 January 2020 to 30 November 2021 and compare them with traditional pairs trading strategies. Our results indicate that OU models can obtain an average return of 50.62% per annum and a Sharpe ratio of 2.63, which significantly exceed those of traditional pairs trading strategies. However, none of them could 'win' in every subperiod with diverse market conditions. Meanwhile, we find that introducing jump-diffusion indeed improves the performance (additional 25.37% annualized return and 1.12 Sharpe ratio). In contrast, considering more regimes does not always bring additional benefits. Robustness checks show that the superior performance of three-regime switching OU model (3RS-OUM) persists even under harsh trading conditions. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

90. Highly durable machine-learned waterproof electronic glove based on low-cost thermal transfer printing for amphibious wearable applications

Author

Duan, Shengshun, primary, Wang, Jiayi, additional, Lin, Yong, additional, Hong, Jianlong, additional, Lin, Yucheng, additional, Xia, Yier, additional, Li, Yinghui, additional, Zhu, Di, additional, Lei, Wei, additional, Su, Wenming, additional, Wang, Baoping, additional, Cui, Zheng, additional, Yuan, Wei, additional, and Wu, Jun, additional

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results