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Spatial distribution of shallow landslides caused by Typhoon Lekima in 2019 in Zhejiang Province, China

Journal of Mountain Science 2024年第5期21卷 1564-1580页

作者： cui yulong YANG Liu XU Chong ZHENG Jun School of Civil Engineering and Architecture Anhui University of Science and TechnologyHuainan 232001China National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China Department of Civil Engineering Zhejiang UniversityHangzhou 310058China

In recent years, the coastal region of Southeast China has witnessed a significant increase in the frequency and intensity of extreme rainfall events associated with landfalling typhoons. The hilly and mountainous terrain of this area, combined with rapid rainfall accumulation, has led to a surge in flash floods and severe geological hazards. On August 10, 2019, Typhoon Lekima made landfall in Zhejiang Province, China, and its torrential rainfall triggered extensive landslides, resulting in substantial damage and economic losses. Utilizing high-resolution satellite images, we compiled a landslide inventory of the affected area, which comprises a total of 2,774 rainfallinduced landslides over an area of 2965 km2. The majority of these landslides were small to mediumsized and exhibited elongated, clustered patterns. Some landslides displayed characteristics of high-level initiation, obstructing or partially blocking rivers, leading to the formation of debris dams. We used the inventory to analyze the distribution pattern of the landslides and their relationship with topographical, geological, and hydrological factors. The results showed that landslide abundance was closely related to elevation, slope angle, faults, and road density. The landslides were predominantly located in hilly and low mountainous areas, with elevations ranging from 150 to 300 m, slopes of 20 to 30 degrees, and a NE-SE aspect. Notably, we observed the highest Landslide Number Density(LND) and Landslide Area Percentage(LAP) in the rhyolite region. Landslides were concentrated within approximately 4 km on either side of fault zones, with their size and frequency negatively correlated with distances to faults, roads, and river systems. Furthermore, under the influence of typhoons, regions with denser vegetation cover exhibited higher landslide density, reaching maximum values in shrubland areas. In areas experiencing significantly increased concentrated rainfall, landslide density also showed a corr

关键词： Typhoon rainfall Landslide characteristics Spatial distribution Southeast coastal region

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Effects of urbanization and forest type on species composition and diversity,forest characteristics,biomass carbon sink,and their associations in Changchun,Northeast China:implications for urban carbon stock improvement

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Journal of Forestry Research 2024年第2期35卷 146-162页

作者： Yuanyuan Wang Xinzhu Dai Xingling Chen Dan Zhang Guiqing Lin Yuanhang Zhou Tianyi Wang yulong cui Academy of Forestry Sciences of Changchun Bureau of Forestry and Landscaping of ChangchunChangchun 130117People’s Republic of China College of Landscape Architecture Changchun UniversityChangchun 130022People’s Republic of China Changchun South Lake Park Bureau of Forestry and Landscaping of ChangchunChangchun 130012People’s Republic of China

Differences in forest attributes and carbon sequestration of each organ and layer between broadleaved and conifer forests of central and outer urban areas are not well-defined,hindering the precise management of urban forests and improvement of *** clarify the effect of two forest types with different urbanization intensities,we determined differences in vegetation composition and diversity,structural traits,and carbon stocks of 152 plots(20 m×20 m)in urban park forests in Changchun,which had the largest green quantity and carbon density *** found that 1.1-fold thicker and healthier trees,and 1.6-to 2.0-fold higher,healthier,denser,and more various shrubs but with sparser trees and herbs occurred in the central urban forests(p<0.05)than in the outer *** conifer forests exhibited 30–70%obviously higher tree aboveground carbon sequestration(including stem and leaf)and 20%bigger trees,especially in the outer forests(p<0.05).In contrast,1.1-to 1.5-fold higher branch stocks,healthier and more diverse trees were found in broadleaved forests of both the inner and outer forests(p<0.05).Plant size and dominant species had similarly important roles in carbon stock improvement,especially big-sized woody plants and Pinus *** addition,a higher number of deciduous or needle species positively affected the broadleaved forest of the central urban area and conifer forest of the outer urban area,*** findings can be used to guide precise management and accelerate the improvement of urban carbon function in Northeast China in the future.

关键词： Species diversity Forest characteristics Biomass carbon sink Forest-type effect Urbanization effect Urban forests

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可吸收止血绒S-100在骨折内固定手术患者中的应用效果

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中外医学研究 2024年第12期22卷 55-58页

作者：崔玉龙河南省胸科医院河南郑州450008

目的:分析可吸收止血绒S-100在骨折内固定手术患者中的应用效果。方法:回顾性选取2022年3月—2023年6月河南省胸科医院收治的106例骨折内固定手术患者作为研究对象。根据可吸收止血绒S-100的使用情况将其分为对照组和观察组,各53例。对... 详细信息

目的:分析可吸收止血绒S-100在骨折内固定手术患者中的应用效果。方法:回顾性选取2022年3月—2023年6月河南省胸科医院收治的106例骨折内固定手术患者作为研究对象。根据可吸收止血绒S-100的使用情况将其分为对照组和观察组,各53例。对照组术中采用气囊止血带止血,观察组术中采用可吸收止血绒S-100。比较两组围手术期指标,引流量及引流管拔管时间,术前及术后第3天凝血功能。结果:观察组手术时间及住院时间均短于对照组,术中出血量少于对照组,差异有统计学意义(P<0.05)。观察组术后24 h、48 h引流量少于对照组,引流管拔管时间短于对照组,差异有统计学意义(P<0.05)。术后第3天,两组凝血酶原时间(PT)、活化部分凝血活酶时间(APTT)均降低,纤维蛋白原(FIB)及D-二聚体(D-D)均明显升高,观察组PT及APTT均高于对照组,FIB及D-D均低于对照组,差异有统计学意义(P<0.05)。结论:可吸收止血绒S-100应用在骨折内固定手术中止血效果显著,能减少局部渗出,缩短引流周期,对患者凝血功能影响较小。

关键词：骨折内固定手术可吸收止血绒S-100 凝血功能引流液出血量

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基于环境因子优化TSES法选择负样本及其在滑坡易发性评价中的应用

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地质科技通报 2024年第3期43卷 192-199页

作者：崔玉龙朱路路徐敏缪海波安徽理工大学土木建筑学院安徽淮南232001

滑坡易发性评价是滑坡灾害防治的重要手段之一,而不合理的滑坡负样本会影响滑坡易发性评价,从而影响到滑坡灾害的防治,因此提供一种合理的负样本选取方法变得尤为关键。以西藏米林市的古滑坡为例,选择高程、坡度、坡向、坡位、距道路距... 详细信息

滑坡易发性评价是滑坡灾害防治的重要手段之一,而不合理的滑坡负样本会影响滑坡易发性评价,从而影响到滑坡灾害的防治,因此提供一种合理的负样本选取方法变得尤为关键。以西藏米林市的古滑坡为例,选择高程、坡度、坡向、坡位、距道路距离、距断层距离、距水系距离、地形起伏度、地层岩性、土地利用类型10类环境因子,使用Relief算法计算环境因子的贡献值并依据贡献值优化选择环境因子;基于环境因子优化的目标空间外向化采样法(target space exteriorization sampling,简称TSES)选择负样本,作为性能优异的随机森林模型的输入变量;之后结合优化的环境因子和正或负样本预测米林市的滑坡易发性,并用混淆矩阵和ROC曲线评价构建模型的性能。为检验环境因子优化的TSES法的有效性和先进性,采用耦合信息量法和TSES法选择滑坡负样本并构建随机森林模型,与环境因子优化的TSES法构建的随机森林模型进行对比研究。结果表明,环境因子优化的TSES法构建的随机森林模型的评价效果较好,其ACC为93.7%、AUC为0.987,均高于耦合信息量、TSES法构成的模型。环境因子优化的TSES法能够提高模型的精度,解决多因子作为约束条件取样中因子选取的问题,为滑坡易发性评价采集负样本提供了新的思路。

关键词：滑坡易发性评价 Relief算法负样本环境因子优化TSES法随机森林古滑坡

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基于逻辑回归模型的凉山州滑坡易发性评价

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山西建筑 2024年第5期50卷 71-73,97页

作者：朱路路崔玉龙安徽理工大学土木建筑学院安徽淮南232001

凉山州地质环境复杂,地质灾害频发,为了防止凉山州因灾致贫、因灾返贫,对凉山州滑坡灾害进行易发性评价。选择10个因子,分析因子与滑坡的分布规律,并建立逻辑回归模型对凉山州滑坡灾害进行易发性评价。结果表明:凉山州滑坡分布于高程1 8... 详细信息

凉山州地质环境复杂,地质灾害频发,为了防止凉山州因灾致贫、因灾返贫,对凉山州滑坡灾害进行易发性评价。选择10个因子,分析因子与滑坡的分布规律,并建立逻辑回归模型对凉山州滑坡灾害进行易发性评价。结果表明:凉山州滑坡分布于高程1 800 m~2 300 m;坡度10°~30°;坡向为东方向;坡位为中坡;距道路距离和距断层距离为小于2 km,NDVI为0.7~0.8;TWI为2~4;岩组为碎屑岩;土地利用类型为耕地。滑坡极高易发区位于凉山州中部安宁河、则木河断裂带两侧和东部汉源-甘洛带、峨边-金阳断裂带两侧。

关键词：凉山州滑坡易发性评价分布规律逻辑回归

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基于逻辑回归模型的伊犁某区域黄土滑坡易发性评价

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河南科技 2024年第8期51卷 109-113页

作者：赵金彪傅贵崔玉龙安徽瑞成土木工程设计咨询有限公司安徽合肥230088 安徽理工大学土木建筑学院安徽淮南232001

【目的】伊犁地区以滑坡为主的地质灾害时有发生,给当地带来了人员伤亡和财产损失,灾害防治形势严峻,需要对当地的滑坡易发性展开研究。【方法】以新疆伊犁州某黄土区为研究区,选取高程、坡度、坡向、坡位、距道路距离、距河流距离、距... 详细信息

【目的】伊犁地区以滑坡为主的地质灾害时有发生,给当地带来了人员伤亡和财产损失,灾害防治形势严峻,需要对当地的滑坡易发性展开研究。【方法】以新疆伊犁州某黄土区为研究区,选取高程、坡度、坡向、坡位、距道路距离、距河流距离、距断层距离、多年平均降雨量、NDVI等9个因子作为滑坡影响因子,建立滑坡易发性评价指标体系,分析因子与滑坡的分布规律。运用逻辑回归模型对研究区滑坡灾害进行易发性评价,并通过ROC曲线对评价结果进行验证。【结果】结果表明:研究区滑坡分布于高程1400~2000 m、坡度10°~30°、坡向为东方向、坡位为中坡和上坡、距断层0~1000 m、NDVI指数为0.7~0.8、降雨量为350~360 mm、距河流距离小于300 m的地区;高易发区和极高易发区主要分布在皮里青河和吉尔格朗河之间的一片低山丘陵区域;逻辑回归模型精度较高,ROC曲线的AUC值均在80%以上。【结论】研究获取的滑坡分布规律和易发性评价结果,可为该区域的滑坡防灾减灾和工程建设规划等提供参考。

关键词：黄土滑坡易发性评价逻辑回归伊犁某区域

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A 110 W fiber gas Raman laser at 1153 nm

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High Power Laser Science and Engineering 2023年第1期11卷 75-81页

作者： yulong cui Xin Tian Binyu Rao Hao Li Wei Huang Wenxi Pei Meng Wang Zilun Chen Zefeng Wang College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangshaChina Nanhu Laser Laboratory National University of Defense TechnologyChangshaChina State Key Laboratory of Pulsed Power Laser Technology ChangshaChina

We report here the first hundred-watt continuous wave fiber gas laser in H_(2)-filled hollow-core photonic crystal fiber(PCF)by stimulated Raman *** pump source is a homemade narrow-linewidth fiber oscillator with a 3 dB linewidth of 0.15 nm at the maximum output power of 380 *** efficiently and stably couple several-hundred-watt pump power into the hollow core and seal the gas,a hollow-core fiber end-cap is fabricated and used at the input end.A maximum power of 110 W at 1153 nm is obtained in a 5 m long hollow-core PCF filled with 36 bar H2,and the conversion efficiency of the first Stokes power is around 48.9%.This work paves the way for high-power fiber gas Raman lasers.

关键词： fiber gas laser narrow linewidth Raman scattering

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Effects of urbanization and forest type on species composition and diversity, forest characteristics, biomass carbon sink, and their associations in Changchun,Northeast China: implications for urban carbon stock improvement

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林业研究（英文版） 2024年第2期 150页

作者： Yuanyuan Wang Xinzhu Dai Xingling Chen Dan Zhang Guiqing Lin Yuanhang Zhou Tianyi Wang yulong cui

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基于逻辑回归模型的喜德县滑坡易发性评价

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河南科技 2024年第1期51卷 95-99页

作者：赵金彪杨柳崔玉龙安徽瑞成土木工程设计咨询有限公司安徽合肥230088 安徽理工大学安徽淮南232001

【目的】系统分析喜德县地质灾害发育特征及规律,为当地地质灾害防治提供参考。【方法】以喜德县为研究区域,选取11个影响因子,分析滑坡的空间分布规律,并通过建立逻辑回归模型,对喜德县滑坡灾害进行易发性评价。【结果】结果表明:喜德... 详细信息

【目的】系统分析喜德县地质灾害发育特征及规律,为当地地质灾害防治提供参考。【方法】以喜德县为研究区域,选取11个影响因子,分析滑坡的空间分布规律,并通过建立逻辑回归模型,对喜德县滑坡灾害进行易发性评价。【结果】结果表明:喜德县滑坡分布于高程2000~2600 m;坡度10°~30°;坡向为东北方向;坡位为中坡;距道路距离小于100 m;距水系距离小于200 m;距村落距离小于500 m;距断层距离为小于3500 m;NDVI为0.7~0.8;地层为白垩系;土地利用为耕地。滑坡高易发区位于鲁基断裂、冷都基断裂、米市河断裂、扎都断裂带周边地区。【结论】滑坡易发性分区结果可直接用于滑坡灾害的防治工作中,对工程建设选址也具有一定的参考价值。

关键词：地质灾害滑坡易发性评价逻辑回归

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Dietary supplementation of benzoic acid and essential oils combination enhances intestinal resilience against LPS stimulation in weaned piglets

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Journal of Animal Science and Biotechnology 2024年第2期15卷 878-897页

作者： Chang cui yulong Wei Yibo Wang Wen Ma Xiaoyu Zheng Jun Wang Ziwei Ma Caichi Wu Licui Chu Shihai Zhang Wutai Guan Fang Chen Guangdong Provincial Key Laboratory of Animal Nutrition Control College of Animal ScienceSouth China Agricultural UniversityGuangzhou 510642China College of Animal Science and National Engineering Research Center for Breeding Swine Industry South China Agricultural UniversityGuangzhou 510642China Guangdong Laboratory for Lingnan Modern Agriculture South China Agricultural UniversityGuangzhou 510642China

Background The benefits of combining benzoic acid and essential oils(BAO)to mitigate intestinal impairment during the weaning process have been well established,while the detailed underlying mechanism has not been fully *** research has primarily focused on the reparative effects of BAO on intestinal injury,while neglecting its potential in enhancing intestinal stress *** In this study,we investigated the pre-protective effect of BAO against LPS-induced stress using a modified experimental *** were pre-supplemented with BAO for 14 d,followed by a challenge with LPS or saline to collect blood and intestinal *** Our findings demonstrated that BAO supplementation led to significant improvements in piglets’final weight,average daily gain,and feed intake/body gain ***,BAO supplementation positively influenced the composition of intestinal microbiota,increasing beneficial Actinobacteriota and Alloprevotella while reducing harmful Desulfobacterota,Prevotella and ***,BAO supplementation effectively mitigated oxidative disturbances and inflammatory responses induced by acute LPS *** was evidenced by elevated levels of T-AOC,SOD,and GSH,as well as decreased levels of MDA,TNF-α,and IL-6 in the ***,piglets subjected to LPS challenge and pre-supplemented with BAO exhibited significant improvements in intestinal morphological structure and enhanced integrity,as indicated by restored expression levels of Occludin and Claudin-1 compared to the non-supplemented *** analysis revealed that BAO supplementation enhanced the jejunal antioxidative capacity by increasing GSH-Px levels and decreasing MDA levels under the LPS challenge and stimulated the activation of the Nrf2 signaling ***,the reduction of TLR4/NF-κB/MAPK signaling pathways activation and proinflammatory factor were also observed in the jejunal of those piglets fed with ***

关键词： Anti-stress Benzoic acid Essential oils Intestine LPS Weaned piglets

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