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Obtaining the best possible predictions of habitat selection for wintering Great Bustards in Cangzhou, Hebei Province with rapid machine learning analysis

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Chinese Science Bulletin 2014年第32期59卷 4323-4331页

作者： Chunrong Mi Falk Huettmann yumin guo College of Nature Conservation Beijing Forestry University EWHALE Laboratory Department of Biology and WildlifeInstitute of Arctic Biology University of Alaska Fairbanks Biology Fairbanks AK 99775 USA

Great Bustards(Otis tarda dybowskii)are one of the world’s heaviest flying birds,occupying grassland habitats in Eastern *** study is located at the most eastern Chinese wintering site in Cangzhou,Hebei Province,where approximately 100 individuals are concentrated in a small area(17.53 km2).Solid information is still lacking about the wintering areas for this subspecies in its eastern range and specifically for *** study area consists of intensely used farmland in proximity to humans and is lacking conservation areas and wild,open ***,we present our results from two years of field data collection on habitat *** choose a machine learning model approach based on a rapid assessment methodology for the winter habitat of the Great *** is based on a spatial analysis of the best available environmental data,which were collected relatively *** relatively new methods in ecology are based on an ensemble of decision trees and include algorithms such as TreeNet,Random Forest and CART used in *** this study,we collected bustard droppings(presence only)from 48 locations between December 2011 and January 2012 and used the sites as training *** from 23 locations were collected in November 2012,and those sites were used as test *** used eight environmental variables as predictor layers for the response variable of bustard presence/*** employed a Geographic Information System(ArcGIS 10.1and Geospatial Modelling Environment)and Google *** with the other three models,we found that predictions from Random Forest obtained a significant difference between presence and *** to this model,the three most important factors for wintering Great Bustards are distance to residential area,distance to water pools,and farmland *** model shows that wintering Great Bustards prefer locations that are over 400 m away from residential areas,within 900 m of water pools and on areas of farmland smal

关键词：河北省沧州市栖息地选择机器学习越冬地大鸨预测地理信息系统野外数据采集

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Time and energy minimization strategy codetermine the loop migration of demoiselle cranes around the Himalayas

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Integrative Zoology 2022年第5期17卷 715-730页

作者： Chunrong MI Xinhai LI Falk HUETTMANN Oleg GOROSHKO yumin guo School of Ecology and Nature Conservation Beijing Forestry UniversityChina Institute of Zoology Chinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina EWHALE Lab Department of Biology and WildlifeInstitute of Arctic BiologyUniversity of Alaska-FairbanksFairbanksUSA Daursky State Nature Biosphere Reserve Institute of Nature ResourcesEcology and Cryology RASRussia

Tens of thousands of demoiselle cranes’crossing the Himalayas to the Indian subcontinent have been reported for decades,but their exact spring migration route remained a mystery until our previous study found they made a detour in spring along the western edge of the Himalayas and crossed the Mongolian Plateau to their breeding areas based on satellite telemetry of 3 *** corroborate the loop migration pattern and explore whether demoiselle crane’s loop migration route is shaped by time-and energy-minimization strategies in spring and autumn and how the temporal and spatial variation of environmental conditions contribute to crane’s selection of migration routes,we tracked 11 satellite-tagged demoiselle cranes from their breeding area in China and Russia,simulated 2 pseudo migration routes,and then compared the environmental conditions,time,and energy cost between true and pseudo routes in the same *** show that demoiselles’spring migration obeyed time-minimization hypothesis,avoiding the colder Qinghai-Tibet Plateau,beneﬁted by abundant food and higher thermal and orographic uplift along the route;autumn migration follows energy-minimization hypothesis with the shorter *** research will contribute to uncover the mechanical reasons why demoiselle crane avoids crossing the giant barrier of the Himalayas in spring,and shapes a loop migration route.

关键词： Anthropoides virgo barrier cross loop migration strategy satellite tracking the Himalayas

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Bats as the main prey of wintering long-eared owl(Asio otus)in Beijing:Integrating biodiversity protection and urban management

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Integrative Zoology 2015年第2期10卷 216-226页

作者： Long TIAN Xuwei ZHOU Yang SHI yumin guo Weidong BAO Department of Zoology Beijing Forestry University College of Nature Conservation Beijing Forestry UniversityBeijingChina Beijing Wildlife Rescue and Rehabilitation Center BeijingChina

The loss of biodiversity from urbanized areas is a major environmental problem challenging policy-makers throughout the *** to this problem are urgently required in *** carried out a case study of wintering long-eared owls(Asio otus)and their main prey to illustrate the negative effects of urbanization combined with ineffective conservation of biodiversity in *** monitoring of owl numbers at two roosting sites from 2004 to 2012 showed that the owl population had fallen rapidly in metropolitan *** of pellet contents identified only seven individuals of two species of *** majority of mammalian prey comprised four bat and seven rodent species,making up 29.3%and 29.5%of the prey items,*** composition varied significantly among years at the two sample *** the urban site the consumption of bats and rodents declined gradually over time,while predation on birds *** contrast,at the suburban site the prey composition showed an overall decrease in the number of bats,a sharp increase and a subsequent decrease in bird prey,and the number of rodent prey fell to a low *** development of real estate and inadequate greenfield management in city parks resulted in negative effects on the bird and small mammal habitat of urban areas in *** suggest that measures to conserve biodiversity should be integrated into future urban planning to maintain China’s rich biodiversity while also achieving sustainable economic development.

关键词： biodiversity reduction city planning diet composition long-eared owl urbanization

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低阻文丘里振弦栅除尘系统内流场模拟研究

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矿业科学学报 2024年第1期9卷 88-97,134页

作者：周紫怡陈祖云刘立新钟芳权郭裕民张际敏骆炳林赖昭琦江西理工大学应急管理与安全工程学院江西赣州341000 赣州有色冶金研究所有限公司江西赣州341000 江西耀升钨业股份有限公司江西崇义341300

为探究除尘系统流场分布情况以及粉尘与液滴颗粒对除尘系统性能的影响,运用Fluent模拟研究气态单相流、气固两相流和气固液三相流的流场分布情况,分析除尘器在不同工况条件下压力与流场分布规律以及颗粒的运动情况。结果表明:除尘系统... 详细信息

为探究除尘系统流场分布情况以及粉尘与液滴颗粒对除尘系统性能的影响,运用Fluent模拟研究气态单相流、气固两相流和气固液三相流的流场分布情况,分析除尘器在不同工况条件下压力与流场分布规律以及颗粒的运动情况。结果表明:除尘系统流场主要受除尘器结构的影响,受粉尘颗粒的影响较小;液滴颗粒的存在会提高系统的除尘效率;加入液滴颗粒后,粉尘运动凌乱度增强,与液滴碰撞作用加强,促进了细微粉尘的凝聚,但同时会影响除尘器流场稳定性,增加除尘系统阻力损失。

关键词：除尘器流场分布除尘效率粉尘与液滴颗粒

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血清IL-35、SDF-1在儿童腹型过敏性紫癜诊断中的临床意义

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检验医学与临床 2024年第14期21卷 2020-2024页

作者：石艳沙郭玉敏史凤霞路冲陈文华河北省邯郸市中心医院儿科河北邯郸056000

目的探讨血清白细胞介素(IL)-35、基质细胞衍生因子-1(SDF-1)在儿童腹型过敏性紫癜(HSP)诊断中的临床意义。方法选取2018年2月至2020年2月在该院治疗的160例早期HSP患儿作为研究对象,根据是否为腹型HSP分为腹型HSP组(80例)和其他类型... 详细信息

目的探讨血清白细胞介素(IL)-35、基质细胞衍生因子-1(SDF-1)在儿童腹型过敏性紫癜(HSP)诊断中的临床意义。方法选取2018年2月至2020年2月在该院治疗的160例早期HSP患儿作为研究对象,根据是否为腹型HSP分为腹型HSP组(80例)和其他类型HSP组(80例)。根据腹型HSP患儿早期病情程度分为轻度组26例、中度组26例和重度组28例。选取同期80例健康儿童作为对照组。采用酶联免疫吸附试验检测血清IL-35和SDF-1水平。采用Pearson相关分析腹型HSP患儿血清IL-35水平与SDF-1的相关性;采用多因素Logistic回归分析腹型HSP发生的影响因素;采用受试者工作特征(ROC)曲线分析血清IL-35和SDF-1对腹型HSP的诊断价值。结果腹型HSP组血清IL-35水平明显低于其他类型HSP组、对照组(P<0.05),腹型HSP组血清SDF-1水平明显高于其他类型HSP组、对照组(P<0.05)。随着腹型HSP患儿病情程度的加重,血清IL-35水平明显降低(P<0.05),SDF-1水平明显升高(P<0.05)。腹型HSP患儿血清IL-35水平与SDF-1呈负相关(r=-0.594,P<0.05)。IL-35水平升高是发生腹型HSP的保护因素(P<0.05),SDF-1水平升高是发生腹型HSP的危险因素(P<0.05)。血清IL-35、SDF-1以及二者联合诊断腹型HSP的曲线下面积(AUC)分别为0.783、0.765、0.805,二者联合诊断的AUC优于血清IL-35、SDF-1单独诊断。结论腹型HSP患儿血清IL-35水平降低,SDF-1水平升高,血清IL-35和SDF-1联合检测可更好地诊断腹型HSP。

关键词：腹型过敏性紫癜白细胞介素-35 基质细胞衍生因子诊断儿童

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紫癜性肾炎患儿血清LRG1和CCL19水平检测对临床早期诊断及预后的价值研究

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现代检验医学杂志 2024年第5期39卷 157-161页

作者：郭玉敏石艳沙李然路冲陈文华邯郸市中心医院河北邯郸056008

目的探究紫癜性肾炎(henoch-schonlein purpura nephritis,HSPN)患儿血清富亮氨酸α2糖蛋白1(leucinerich-alpha-2-glycoprotein1,LRG1)和趋化因子(C-C基序)配体19(CC chemokine ligand 19,CCL19)水平检测对临床早期诊断及预后的价值研究。方法选取2021年5月~2023年5月于邯郸市中心医院就诊治疗的108例HSPN患儿作为研究对象,同时选取72例体检健康儿童作为对照组。检测两组血清LRG1,CCL19,IgM,IgA及IgG水平。利用Logistic回归方法分析HSPN发生的影响因素,ROC曲线评估LRG1,CCL19水平对HSPN患儿早期诊断临床价值。分析处于HSPN急性期、慢性期、康复期患儿血清LRG1,CCL19水平差异,利用Spearman相关性分析探究血清LRG1,CCL19水平与HSPN患儿病程时期的关联。结果HSPN组患儿血清LRG1(184.36±23.64 ng/L),CCL19(463.19±89.46 ng/L)水平均显著高于对照组儿童(149.42±18.29 ng/L,208.83±52.97 ng/L),差异具有统计学意义(t=10.600,21.710,均P<0.05)。Logistic回归结果显示,LRG1[OR(95%CI):1.429(1.057~1.933)],CCL19[OR(95%CI):1.842(1.216~2.791)]均是儿童发生HSPN的影响因素(均P<0.05)。受试者工作特征(ROC)曲线分析可知,血清LRG1,CCL19及二者联合诊断儿童发生HSPN的曲线下面积(AUC)分别为0.868,0.881和0.952,且二者联合应用于临床诊断预测患儿发生HSPN优于血清LRG1,CCL19各自单独诊断(Z=3.147,3.487,均P=0.001)。HSPN急性期、慢性期患儿血清LRG1(203.49±24.89 ng/L,177.56±23.19 ng/L),CCL19(591.13±98.32ng/L,415.61±89.82 ng/L)水平显著高于康复期患儿(158.53±21.96 ng/L,295.17±69.61 ng/L),差异具有统计学意义(t=6.917,12.101;5.320,3.102,均P<0.05),HSPN急性期患儿血清LRG1,CCL19水平明显高于慢性期患儿,差异具有统计学意义(t=5.059,8.750,均P<0.05)。Spearman相关性分析显示,HSPN患儿血清LRG1,CCL19水平与其病程时期均呈正相关(r=0.506,0.689,均P<0.001)。结论HSPN患儿血清LRG1,CCL19水平升高,二者联合检测可提高HSPN的早期临床诊断价值,评估HSPN患儿预后。

关键词：紫癜性肾炎富亮氨酸α2糖蛋白1 趋化因子(C-C基序)配体19

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Annual spatio-temporal migration patterns of Hooded Cranes wintering in Izumi based on satellite tracking and their implications for conservation

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Avian Research 2018年第3期9卷 264-272页

作者： Chunrong Mi Anders Pape Moller yumin guo College of Nature Conservation Beijing Forestry UniversityBeijing 100083China Ecologie Systématique Evolution UniversitéParis-SudCNRSAgroParisTechUniversitéParis-Saclay91405 Orsay CedexFrance

Background: The Hooded Crane(Grus monacha) is listed as a vulnerable species by IUCN. Knowledge about the migration of the Hooded Crane is still limited. Here we reported the spatio-temporal migration patterns of Hooded Cranes wintering in Izumi, Japan, as well as important stopover areas for their ***: Four adult and five subadult cranes, all wintering in Izumi, Japan, were fitted with satellite transmitters(GPS–GSM system) at their stopover sites in northeastern China in 2014 and 2015. We analyzed the time and duration of adults and subadults in spring and autumn migration, as well as the time and duration they stayed in breeding and wintering ground. In addition, we analyzed the land use of the cranes in stopover ***: Adult cranes took much longer time to migrate both north in spring(mean days) compared with subadult cranes(15.3 and 5.2 days, respectively). H= 44.3 days) and south in fall(mean = 54.0 owever, the subadults had longer wintering(mean = 149.8 days) and nomadic(breeding season for adults) seasons(mean d with adults(133.8 and 122.3 days, respectively). Three important stopover areas have been= 196.8 days) compare identified: the region around Muraviovka Park in Russia, the Songnen Plain in China, and the west coast of South Korea, where cranes spent most of their migration time(62.2 and 85.7% in spring and autumn, respectively). During migration, nomadic period and winter, Hooded Cranes usually stay in croplands for resting and feeding. In non-wintering season, less than 6% of stopover sites were located within protected ***: Overall, our results contribute to understanding the annual spatio-temporal migration patterns of Hooded Cranes in the eastern flyway, and planning conservation measures for this species.

关键词： Conservation Eastern migration route Hooded Cranes(Grus monacha) Izumi Satellite tracking Spatiotemporal migration patterns

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A Fault-Tolerant Mobility-Aware Caching Method in Edge Computing

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 907-927页

作者： Yong Ma Han Zhao Kunyin guo Yunni Xia Xu Wang Xianhua Niu Dongge Zhu yumin Dong School of Computer Information Engineering Jiangxi Normal UniversityNanchang330000China School of Digital Industry Jiangxi Normal UniversityShangrao334000China The College of Computer Science Chongqing UniversityChongqing400044China College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing400030China School of Computer and Software Engineering Xihua UniversityChengdu610039China Electric Power Research Institute of State Grid Ningxia Electric Power Company Ltd. Yinchuan750002China College of Computer and Information Science Chongqing Normal UniversityChongqing401331China

Mobile Edge Computing(MEC)is a technology designed for the on-demand provisioning of computing and storage services,strategically positioned close to *** the MEC environment,frequently accessed content can be deployed and cached on edge servers to optimize the efficiency of content delivery,ultimately enhancing the quality of the user ***,due to the typical placement of edge devices and nodes at the network’s periphery,these components may face various potential fault tolerance challenges,including network instability,device failures,and resource *** the dynamic nature ofMEC,making high-quality content caching decisions for real-time mobile applications,especially those sensitive to latency,by effectively utilizing mobility information,continues to be a significant *** response to this challenge,this paper introduces FT-MAACC,a mobility-aware caching solution grounded in multi-agent deep reinforcement learning and equipped with fault tolerance *** approach comprehensively integrates content adaptivity algorithms to evaluate the priority of highly user-adaptive cached ***,it relies on collaborative caching strategies based onmulti-agent deep reinforcement learningmodels and establishes a fault-tolerancemodel to ensure the system’s reliability,availability,and *** results unequivocally demonstrate that FTMAACC outperforms its peer methods in cache hit rates and transmission latency.

关键词： Mobile edge networks mobility fault tolerance cooperative caching multi-agent deep reinforcement learning content prediction

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基于卫星定位跟踪数据解读白头鹤的性别、年龄、繁殖及领域回归

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生态学报 2023年第8期43卷 3137-3149页

作者：李显达郭玉民北京林业大学生态与自然保护学院北京100083 黑龙江中央站黑嘴松鸡国家级自然保护区服务中心嫩江161499

2014-2021年,在中国东北、长江中下游以及蒙古国和俄罗斯,通过救助和野外捕捉共计为33只白头鹤(Grus monacha)安装了卫星定位跟踪器,同时佩戴了金属环和彩色塑料环。根据卫星定位信息,找到繁殖巢后,在其周边布设红外照相机。利用卫星跟... 详细信息

2014-2021年,在中国东北、长江中下游以及蒙古国和俄罗斯,通过救助和野外捕捉共计为33只白头鹤(Grus monacha)安装了卫星定位跟踪器,同时佩戴了金属环和彩色塑料环。根据卫星定位信息,找到繁殖巢后,在其周边布设红外照相机。利用卫星跟踪6年以上的6只白头鹤个体以及在小兴安岭北部度夏、繁殖的7只白头鹤个体的定位跟踪数据,将5月15日零时位点为基准点,利用设置的位移-时间计算公式将定位坐标转为位移-时间曲线,使获得的定位数据图形化,结合野外行为观察,获得判别指标:繁殖地或度夏地夜间位移-时间曲线的平直度,反映了白头鹤夜栖点的位置变化;根据曲线平直度判断:曲线平直的是雌性,曲线呈锯齿状的是雄性;距离繁殖区较近、曲线变化幅度非常大的是亚成体,在繁殖区域、曲线近乎平直达1个月左右的是成鸟;根据平直曲线长度,确认是否繁殖成功及初始繁殖年龄;4月初至6月末期间的不同跟踪个体的位移-时间曲线重合的,可以认定为配对关系;重合部分的长短,则反映出配对关系的稳定性;巢址的位移-时间曲线间距,反映出巢址的变化。不同年份的巢址间距离,可以展示白头鹤具有很规则的领域回归行为。依据这些指标对跟踪的全部33只白头鹤的性别、年龄进行了判别。解读跟踪个体的配对、繁殖状况以及领域回归等。结果表明,基于卫星定位跟踪数据的位移-时间曲线与野外观察获得的信息相结合,为进一步挖掘卫星定位跟踪数据,推进被跟踪物种的深入分析提供了新的方法。

关键词：白头鹤卫星跟踪位移-时间曲线性别年龄繁殖领域回归

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秋季林甸停歇地白头鹤的食性分析

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野生动物学报 2015年第1期36卷 76-79页

作者：黄建郭玉民北京林业大学自然保护区学院北京100083

为了了解和掌握白头鹤秋季在其迁徙过程中的食性,2011~2012年,连续两个秋季以粪便分析法,对在黑龙江省林甸迁徙停歇中的白头鹤进行了食性分析。共收集600余个粪便样本,分别采自于夜栖地、采食地和活动地。随机抽取各50份采自于三地的样... 详细信息

为了了解和掌握白头鹤秋季在其迁徙过程中的食性,2011~2012年,连续两个秋季以粪便分析法,对在黑龙江省林甸迁徙停歇中的白头鹤进行了食性分析。共收集600余个粪便样本,分别采自于夜栖地、采食地和活动地。随机抽取各50份采自于三地的样品进行镜检分析。结果表明:白头鹤在秋季停歇地主要以植物性食物为主,其中玉米占主要部分(出现频率97.3%;相对密度47.9%);动物性食物次之,其中直翅目昆虫占主要部分(出现频率58.7%;相对密度28.8%)。该结果与实际观察到的秋季迁徙停歇的白头鹤的取食活动主要集中在采食地——玉米地相印证。秋季迁徙停歇中的白头鹤有赖于玉米种植,建议建立季节性保护地,设立人工投食点,为白头鹤提供充足的食物,以利于其恢复体力,继续南迁。

关键词：白头鹤食性分析迁徙林甸玉米直翅目昆虫

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