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Your search keyword '"Zhu, Weixing"' showing total 412 results
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412 results on '"Zhu, Weixing"'

1. Probabilistic forecasting of ultra-short-term PV output using the improved GWO and TCN-QRF

Author

ZHU Tao, YANG Huanhong, XIAO Feng, LI Guang, LI Guangyi, ZHU Weixing, and YE Jingyuan

Subjects
improved gwo, probabilistic forecasting, pv output, tcn-qrf, Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Abstract

As the share of photovoltaic （PV） power generation grows increasingly within electric power systems， the accurate probabilistic forecasting of PV output can be help for grid regulation and operation. To enhance forecasting precision， a probabilistic forecasting method for ultra-short-term photovoltaic output using the improved grey wolf optimization （GWO）， temporal convolutional neural networks and quantile random forests （TCN-QRF） is proposed. Firstly， the preprocessed time series dataset for PV output is converted into a supervised learning dataset. Then， the TCN is used to extract the temporal features of PV output as the input to the QRF， constructing the TCN-QRF model. Finally， the GWO is improved using the nonlinear convergence factor and Gaussian mutation strategy. The improved GWO efficiently selects hyperparameters for TCN-QRF， enabling a more precise probabilistic forecasting of PV output.

Published
2024
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8. Climate change drivers alter root controls over litter decomposition in a semi-arid grassland

Author

Li, Zhen, Wang, Fuwei, Su, Fanglong, Wang, Peng, Li, Shijie, Bai, Tongshuo, Wei, Yanan, Liu, Manqiang, Chen, Dima, Zhu, Weixing, Eviner, Valerie, Wang, Yi, and Hu, Shuijin

Subjects
Climate Action, Life on Land, Climate change, Litter decomposition, Priming effect, Semi-arid grasslands, Water availability, Environmental Sciences, Biological Sciences, Agricultural and Veterinary Sciences, Agronomy & Agriculture
Abstract

Plant roots are the primary source of soil organic carbon (C) and critically support the growth and activities of microbes in the rhizosphere. Climate change factors may, however, modify root-microbial interactions and impact C dynamics in the rhizosphere. Yet, the direction and magnitude of interactive climate change effects, as well as the underlying mechanisms, remain unclear. Here we show evidence from a field experiment demonstrating that warming and precipitation changes strengthen root controls over litter decomposition in a semi-arid grassland. While warming and precipitation reduction suppressed microbial decomposition of root litter regardless of the root presence, precipitation increase stimulated litter decomposition only in the absence of roots, suggesting that plant competition for water constraints the activities of saprophytic microbes. Root presence increased microbial biomass but reduced microbial activities such as respiration, C cycling enzymes and litter decomposition, indicating that roots exert differential effects on microbes through altering C or water availability. In addition, nitrogen (N) input significantly reduced microbial biomass and microbial activities (respiration). Together, these results showed that alterations in soil moisture induced by climate change drivers critically modulate root controls over microbial decomposition in soil. Our findings suggest that warming-enhanced plant water utilization, combined with N-induced suppression of microbes, may provide a unique mechanism through which moderate increases in precipitation, warming and N input interactively suppress microbial decomposition, thereby facilitating short-term soil C sequestration in the arid and semi-arid grasslands.

Published
2021

14. Retention of deposited ammonium and nitrate and its impact on the global forest carbon sink

Author

Gurmesa, Geshere Abdisa, Wang, Ang, Li, Shanlong, Peng, Shushi, de Vries, Wim, Gundersen, Per, Ciais, Philippe, Phillips, Oliver L., Hobbie, Erik A., Zhu, Weixing, Nadelhoffer, Knute, Xi, Yi, Bai, Edith, Sun, Tao, Chen, Dexiang, Zhou, Wenjun, Zhang, Yiping, Guo, Yingrong, Zhu, Jiaojun, Duan, Lei, Li, Dejun, Koba, Keisuke, Du, Enzai, Zhou, Guoyi, Han, Xingguo, Han, Shijie, and Fang, Yunting

Published
2022
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35. Socioeconomics Drive Urban Plant Diversity

Author

Hope, Diane, Gries, Corinna, Zhu, Weixing, Fagan, William F., Redman, Charles L., Grimm, Nancy B., Nelson, Amy L., Martin, Chris, and Kinzig, Ann

Published
2003

40. Effects of nitrogen deposition on carbon allocation between wood and leaves in temperate forests

Author

Gao, Meixia, Zhu, Feifei, Hobbie, Erik A., Zhu, Weixing, Li, Shanlong, Gurmesa, Geshere A., Wang, Ang, Fang, Xiaoming, Zhu, Jiaojun, Gundersen, Per, Huang, Kai, Wu, Zhou, Fang, Yunting, Gao, Meixia, Zhu, Feifei, Hobbie, Erik A., Zhu, Weixing, Li, Shanlong, Gurmesa, Geshere A., Wang, Ang, Fang, Xiaoming, Zhu, Jiaojun, Gundersen, Per, Huang, Kai, Wu, Zhou, and Fang, Yunting

Abstract

Societal Impact Statement Increasing atmospheric nitrogen (N) deposition represents a major global change factor, but its long-term effect on tree growth and carbon (C) sequestration remains uncertain. Our manipulation experiment and meta-analysis reveal that N deposition in temperate and boreal forests promoted tree growth and the allocation of more C into wood than into leaves in China and worldwide. Thus, N deposition may increase forest C sequestration through enhanced wood production and distribution of C into stable sinks. In the context of achieving "Carbon Neutrality," understanding how N deposition affect long-term forest C sinks will help us with mitigation strategies under climate change. Increased nitrogen (N) deposition is driving many temperate and boreal forests in the Northern Hemisphere towards N saturation. However, it is uncertain how long-term N deposition affects tree growth and carbon (C) allocation in these forests. To investigate this, we treated temperate larch and mixed forests in northeastern China with N additions for 8 years. In addition, we collected data from 25 N-addition experiments in temperate and boreal forests worldwide to reveal the overall effects of N on tree growth and C allocation. Nitrogen additions significantly promoted total biomass increment by 24% in both study forests, with on average additional 8 kg C per kg N gain into woody biomass over the study period. Nitrogen additions increased the ratio of woody biomass increment to foliage litterfall production in the larch forest (by 34%). Literature data analysis also revealed greater N promotion on wood (24%) over foliage (9%) production. However, the positive effect on foliage diminished over time. These results combined imply that N deposition may promote tree growth in temperate and boreal regions and drive proportionally more photosynthate allocation into wood than leaves, thus may enhance forest C sequestration in the long run.

Published
2023

45. Microbial denitrification dominates nitrate losses from forest ecosystems

Author

Fang, Yunting, Koba, Keisuke, Makabe, Akiko, Takahashi, Chieko, Zhu, Weixing, Hayashi, Takahiro, Hokari, Azusa A., Urakawa, Rieko, Bai, Edith, Houlton, Benjamin Z., Xi, Dan, Zhang, Shasha, Matsushita, Kayo, Tu, Ying, Liu, Dongwei, Zhu, Feifei, Wang, Zhenyu, Zhou, Guoyi, Chen, Dexiang, Makita, Tomoko, Toda, Hiroto, Liu, Xueyan, Chen, Quansheng, Zhang, Deqiang, Li, Yide, and Yoh, Muneoki

Published
2015

49. A strong temperature dependence of soil nitric oxide emission from a temperate forest in Northeast China

Author

Huang, Kai, primary, Su, Chenxia, additional, Liu, Dongwei, additional, Duan, Yihang, additional, Kang, Ronghua, additional, Yu, Haoming, additional, Liu, Yuqi, additional, Li, Xue, additional, Gurmesa, Geshere Abdisa, additional, Quan, Zhi, additional, Christiansen, Jesper Riis, additional, Zhu, Weixing, additional, and Fang, Yunting, additional

Published
2022
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