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您的检索式：作者名="Xiuling Guan"
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| 1 | Designing near-natural planting patterns for plantation forests in China显示文摘Background: China has a long tradition of managing planted forests. Different species of Populus, Eucalyptus, Larix, Cunninghamia and Pinus are planted to satisfy the local demand for wood products and provide ecological services at the same time. Evidence of the greater resilience of natural forests provides the motivation to develop asymmetric planting patterns, which is the focus of this study. We present a new method for designing plantation patterns that follow those observed in natural ecosystems and to maintain some regularity for operational convenience. Methods: Based on the uniform angle index, we analyzed the spatial structure of six natural forests in different regions of China. The uniform angle index describes the degree of spatial uniformity of the n nearest neighbors of a given reference tree. Accordingly, we identified all possible patterns of a neighborhood group within a regular planting pattern and developed a method to optimize planting point arrangements that contain some randomness as well as a minimum degree of regularity. Results:(1) There are 13 types of structural units in a regular planting, including seven random units, five even units and one cluster unit;(2) Five near-natural arrangements are presented with a minimum proportion of 50% of random units. These five arrangements represent a combination of regularity for operational convenience and asymmetry. Conclusions: The new planting patterns developed in this study are expected to increase the asymmetric competition and resilience of these important ecosystems. Some experimental plantings, based on our findings, have already been established, e.g., in Pinus tabulaeformis plantations in Tianshui, Gansu Province, and in a Populus deltoides plantation in Fangshan near Beijing. | Gongqiao Zhang Gangying Hui Yanbo Hu Zhonghua Zhao Xiuling Guan Klaus von Gadow Ganggang Zhang | 2019 | Forest Ecosystems2019，6，3： | 6 |
| 2 | Expert consensus on the diagnosis and treatment of severe and critical coronavirus disease 2019(COVID-19)显示文摘Introduction Coronavirus disease 2019(COVID-19),a disease caused by severe acute respiratory syndrome-coronavirus-2(SARS-CoV-2),is highly contagious[1]and has developed into a global pan-demic.Up to July 1,2022,COVID-19 has affected>200 coun-tries and regions across the globe and caused 545,226,550 con-firmed cases and 6334,728 deaths,[2]seriously compromising human life,public properties. | You Shang Jianfeng Wu Jinglun Liu Yun Long Jianfeng Xie Dong Zhang Bo Hu Yuan Zong Xuelian Liao Xiuling Shang Renyu Ding Kai Kang Jiao Liu Aijun Pan Yonghao Xu Changsong Wang Qianghong Xu Xijing Zhang Jicheng Zhang Ling Liu Jiancheng Zhang Yi Yang Kaijiang Yu Xiangdong Guan Dechang Chen Chinese Society of Critical Care Medicine,Chinese Medical Association | 2022 | Journal of Intensive Medicine2022，2，4： | 0 |
| 3 | Expert consensus on the diagnosis and treatment of severe and critical coronavirus disease 2019显示文摘This consensus focuses on severe and critical coronavi-rus disease 2019(COVID-19)mainly based on the consideration that mortality of severe and critical cases is higher than mild and mo derate cases of COVID-19.Severe patients usually developed dyspnea and/or hypoxemia in a short period of time,and in some cases progressively developed respiratory failure,septic shock,coagulation disorders,and multi-organ dysfunction. | You Shang Jianfeng Wu Jinglun Liu Yun Long Jianfeng Xie Dong Zhang Bo Hu Yuan Zong Xuelian Liao Xiuling Shang Renyu Ding Kai Kang Jiao Liu Ajun Pan Yonghao Xu Changsong Wang Qianghong Xu Xjing Zhang Jicheng Zhang Ling Liu Jiancheng Zhang Yi Yang Kajiang Yu Xiangdong Guan Dechang Chen Chinese Society of Critical Care Medicine Chinese Medical Association | 2022 | Chinese Medical Journal2022，135，16： | 0 |
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