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Why lowland riparian trees are difficult to use for streamflow reconstruction

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Journal of Forestry Research 2024年第3期35卷 219-230页

作者： xiaomei Peng Shengchun Xiao Bao yang Quanyan Tian Vladimir V.Shishov Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000People's Republic of China School of Geography and Ocean Science Nanjing UniversityNanjing 210023People's Republic of China Institute of Fundamental Biology and Biotechnology Siberian Federal UniversityKrasnoyarskRussia 660041

Existing streamflow reconstructions based on tree-ring analysis mostly rely on species from upland,mainly montane areas,while lowland species(generally plain)areas are rarely *** limits the understanding of streamflow change history in the lowlands,which is an important basis for water resource *** study focused on Populus euphratica stands located along the main stream,eastern and western tributaries in the lower reaches of the Heihe River basin(HRb),in arid northwestern *** investigated how streamflow regulation interferes with ripar-ian trees in lowlands when they used for streamflow ***-ring width chronologies were developed and analyzed in conjunction with meteorological and hydrologic observation *** results show streamflow regulation leads in sharp fluctuations in the streamflow allocation between the eastern tributaries and western *** resulted in instability of the correlation between streamflow at the two tributaries and at the Zhengyixia hydrologic station,with corresponding fluctuations in radial growth of poplar trees on the banks of the two tributaries and at the *** regulation altered the natural patterns of seasonal streamflow below the station,changing the time window of poplar *** study provides useful insight into tree-ring width based streamflow reconstruction in the lowlands.

关键词： Tree-ring width-Dendrochronology Populus euphratica The Ejina Oasis Streamflow

Mapping China’s offshore mariculture based on dense time-series optical and radar data

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International Journal of Digital Earth 2022年第1期15卷 1326-1349页

作者： Xiaoliang Liu Zhihua Wang xiaomei yang Yueming Liu Bin Liu Junyao Zhang Ku Gao Dan Meng Yaxin Ding State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China

Due to the weak information about cultural targets in the complex marine environment,an omission problem exists in large-scale mariculture extraction using single-view and single-source *** overcome this problem,we developed a mariculture extraction method that combines dense time-series Sentinel-2 and Sentinel-1 data.A high-precision Chinese mariculture distribution map for 2020 was produced with an overall accuracy of 94.00%and a kappa coefficient of *** results show that(1)the total area of mariculture was 1173249.22 ha on the national scale,which was significantly larger than the previous studies(459595.70 and 205920.28 ha,respectively),with Shandong Province(39.09%)having the largest proportion;(2)China’s mariculture presented a spatial distribution characteristic of‘Denser North and Sparser South’,and mariculture was centralized in the coastal zones of the northern provinces(60.76%)rather than the southern provinces;(3)the official production statistics and remote sensing-derived mariculture area revealed a highly corresponding trend at the provincial level,with an R2 reaching 0.78,which is much higher than the 0.07 and 0.41 values of the comparison *** results directly provide data reference for mariculture production estimation and site selection or ideas for mariculture extraction in other regions and globally.

关键词： Aquaculture mariculture multi-source remote sensing time-series China’s coastal zone

地塞米松联合右美托咪定对髋关节置换术老年病人的镇痛观察

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安徽医药 2024年第4期28卷 826-829页

作者：胡秀才杨晓梅李亮于健司晓彬牛志强沧州市中心医院麻醉一科河北沧州061001 沧州市中心医院急诊科河北沧州061001 沧州市中心医院供应室河北沧州061001

目的探讨地塞米松联合右美托咪定对行髋关节置换术老年病人术后疼痛效果。方法选取2020年2月至2022年2月沧州市中心医院收治的80例行髋关节置换术的老年病人,按照随机数字表法分为观察组(n=40)和对照组(n=40)。对照组于麻醉诱导前泵... 详细信息

目的探讨地塞米松联合右美托咪定对行髋关节置换术老年病人术后疼痛效果。方法选取2020年2月至2022年2月沧州市中心医院收治的80例行髋关节置换术的老年病人,按照随机数字表法分为观察组(n=40)和对照组(n=40)。对照组于麻醉诱导前泵注右美托咪定1μg/kg,时间为10 min,之后调整剂量为0.5μg·kg^(-1)·h^(-1),直至术前30 min。观察组则在采用右美托咪定泵注的同时静脉注射5 mg地塞米松。对比两组病人术后疼痛程度、肾功能指标[血肌酐(Scr)、尿素氮(BUN)]及血清前列腺素E2(PGE2)、白细胞介素-6(IL-6)、细胞间黏附分子-1(ICAM-1)、C-反应蛋白(CRP)水平。结果观察组病人术后12h、术后24 h的视觉模拟评分法(VAS)评分均低于对照组(P<0.05);两组术后1 h、24 h,Scr、BUN、PGE2、IL-6、ICAM-1、CRP水平在组间、时间及交互方面进行比较,差异有统计学意义(P<0.05);手术后1 h,观察组Scr、BUN水平分别为(65.33±8.06)μmol/L、(5.64±0.78)mmol/L;手术后24 h,观察组Scr、BUN、PGE2、IL-6、ICAM-1、CRP水平分别为(69.07±8.08)μmol/L、(6.06±0.88)mmol/L、(17.76±2.65)μg/L、(62.38±7.43)ng/L、(283.35±37.65)μg/L、(10.39±1.33)mg/L;手术后1 h,对照组Scr、BUN水平分别为(69.76±7.96)μmol/L、(6.16±0.86)mmol/L;手术后24 h,对照组Scr、BUN、PGE2、IL-6、ICAM-1、CRP水平分别为(69.76±7.96)μmol/L、(6.58±0.93)mmol/L、(22.73±3.36)μg/L、(79.48±9.34)ng/L、(326.86±42.45)μg/L、(14.22±1.84)mg/L。观察组术后1 h、术后24 h的Scr、BUN、PGE2、IL-6、ICAM-1、CRP水平均低于对照组(P<0.05)。结论地塞米松联合右美托咪定能够减轻髋关节置换术老年病人术后疼痛程度,减轻肾功能损伤、降低炎症反应。

关键词：安定镇痛关节成形术,置换,髋地塞米松右美托咪定老年人术后疼痛肾功能炎症反应

新医科背景下护理学专业机能实验学教学模式改革探索

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科教文汇 2024年第6期 112-116页

作者：吴勤婷韦红巧黎静梁桂宁杨晓梅广西医科大学基础医学院广西南宁530021

随着新医科建设的全面推进,卓越护理人才培养面临新的要求和挑战。实验教学在高等医学教育人才培养中起到重要作用。该文作者在机能实验学教学中,以岗位胜任能力培养为导向,通过有机融合课程思政,优化基础性实验,开展线上线下混合式教学... 详细信息

随着新医科建设的全面推进,卓越护理人才培养面临新的要求和挑战。实验教学在高等医学教育人才培养中起到重要作用。该文作者在机能实验学教学中,以岗位胜任能力培养为导向,通过有机融合课程思政,优化基础性实验,开展线上线下混合式教学,拓展突出护理专业特色的人体生理实验,引入虚拟仿真实验,并完善课程教学多维度评价考核体系,构建“四位一体”的机能实验学教学新模式,加强培养本科护理学专业学生观察分析能力、实际操作能力和医学人文精神,有效助力本科护理学专业学生综合能力提升。

关键词：教学改革护理学人体生理实验新医科虚拟仿真

Quality of terrestrial data derived from UAV photogrammetry:A case study of Hetao irrigation district in northern China

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International Journal of Agricultural and Biological Engineering 2018年第3期11卷 171-177页

作者： Hongming Zhang Jiangtao yang Jantiene E.M.Baartman Shuqin Li Bei Jin Wenting Han xiaomei yang Lingtong Gai Coen J.Ritsema Violette Geissen College of Information Engineering Northwest A&F UniversityYangling 712100ShaanxiChina College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100ShaanxiChina College of Economics and Management Northwest A&F UniversityYangling 712100ShaanxiChina Institute of Soil and Water Conservation Northwest A&F UniversityYangling 712100ShaanxiChina College of Natural Resources and Environment Northwest A&F UniversityYangling 712100ShaanxiChina Soil Physics and Land Management Group Wageningen UniversityPO Box 476700AA Wageningenthe Netherlands

Most crops in northern China are irrigated,but the topography affects the water use,soil erosion,runoff and *** for collecting high-resolution topographic data are essential for adequately assessing these *** surveys and techniques of light detection and ranging have good accuracy,but data acquisition can be time-consuming and expensive for large *** rapid technological development has provided new,flexible,high-resolution methods for collecting topographic data,such as photogrammetry using unmanned aerial vehicles(UAVs).The accuracy of UAV photogrammetry for generating high-resolution Digital Elevation Model(DEM)and for determining the width of irrigation channels,however,has not been assessed.A fixed-wing UAV was used for collecting high-resolution(0.15 m)topographic data for the Hetao irrigation district,the third largest irrigation district in China.112 ground checkpoints(GCPs)were surveyed by using a real-time kinematic global positioning system to evaluate the accuracy of the DEMs and channel widths.A comparison of manually measured channel widths with the widths derived from the DEMs indicated that the DEM-derived widths had vertical and horizontal root mean square errors of 13.0 and 7.9 cm,*** photogrammetric data can thus be used for land surveying,digital mapping,calculating channel capacity,monitoring crops,and predicting yields,with the advantages of economy,speed and ease.

关键词： UAVs GIS DEM irrigation area photogrammetry accuracy evaluation

Expression of bone morphogenetic protein 7 in the cerebral cortex of rats after ischemic-hypoxic injury

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Neural Regeneration Research 2007年第11期2卷 641-644页

作者： Liju Luan xiaomei yang Lihua Qin Ke Wang Chunhua Chen Weiguang Zhang Lu Wan Dan Li Department of Anatomy and Histoembryology Peking University Health Science Center Beijing 100083 China

BACKGROUND： Some researches demonstrate that exogenous bone morphogenetic protein 7 （BMP-7） can protect ischemic cerebral nerve tissue and promote recovery of motor energy function; however, there is lack of direct evidences of endogenous BMP-7 effect. OBJECTIVE： To observe the expression of endogenous BMP-7 in nerve tissue with ischemic-hypoxic injury and investigate the possible effects on damaged nerve tissue. DESIGN： Observational contrast animal study. SETTING： Department of Anatomy and Histoembryology, Peking University Health Science Center. MATERIALS： The experiment was carried out in the Nerve Researching Laboratory of Anatomy Department, Peking University Health Science Center from October 2006 to March 2007. A total of 25 adult male SD rats weighing 250 - 300 g and several newborn SD rats were selected from Experimental Animal Center, Peking University Health Science Center. Rabbit-anti-BMP-7 polyclonal antibody was provided by Wuhan Boster Company. METHODS： ① Adult rats were randomly divided into ischemia group （n =10）, sham operation group （n = 10） and normal group （n =5）. Right external-internal carotid artery occlusion was used to infarct middle cerebral artery of adult rats in the ischemia group so as to copy focal cerebral infarction models. Line cork was inserted in crotch of internal and external carotid artery of adult rats in the sham operation group, while adult rats in the normal group were not given any treatments. ② Cerebral cortex of newborn rats was separated to obtain cell suspension. Cells which were cultured for 10 days were divided into control group and hypoxia/reoxygenation group. And then, cells in the hypoxia/reoxygenation group were cultured in hypoxic incubator for 4 hours and given reoxygenation for 24 hours. MAIN OUTCOME MEASURES： Immunohistochemical method was used to measure expression of BMP-7 in cerebral cortex at 24 hours after ischemia/reperfusion culture and in primary hypoxic culture. RESULTS： ① At 24 hours

关键词： cerebral ischemia hypoxia bone morphogenetic protein 7 cerebral cortex rats

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浅谈冷链物流设施设备保温材料

计量与测试技术 2024年第2期51卷 69-71页

作者：龚虎陈玲玲杨晓梅张翔宇陈凯徐云帆成都市计量检定测试院成都市市场监督管理局计量处

随着经济发展,人们的生活水平日益改善,对生活品质的要求也越来越高,促使了我国冷链物流的快速发展。保温材料作为冷链设施设备的重要组成部分,能有效减少外界温度对冷链货物的影响。本文对冷链设施设备保温材料的性能及其应用情况进行... 详细信息

随着经济发展,人们的生活水平日益改善,对生活品质的要求也越来越高,促使了我国冷链物流的快速发展。保温材料作为冷链设施设备的重要组成部分,能有效减少外界温度对冷链货物的影响。本文对冷链设施设备保温材料的性能及其应用情况进行了概述。

关键词：聚氨酯硬质泡沫塑料挤塑聚苯乙烯泡沫膨胀聚苯板发泡聚丙烯泡沫塑料

Controlling synthesis and gas-sensing properties of ordered mesoporous In2O3-reduced graphene oxide(r GO) nanocomposite

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Science Bulletin 2015年第31期60卷 1348-1354页

作者： Ping Xue xiaomei yang Xiaoyong Lai Weitao Xia Peng Li Junzhuo Fang Key Laboratory of Energy Resource and Chemical Engineering State Key Laboratory Cultivation Base of Natural Gas Conversion School of Chemistry and Chemical EngineeringNingxia University

Herein, we describe a strategy for fabricating ordered mesoporous In2O3-reduced graphene oxide(r GO)nanocomposite through ultrasonic mixing, where ordered mesoporous In2O3 nanoparticles are synthesized via the nanocasting route by using mesoporous silica as a hard template, which possess ordered mesostructure with a large surface area of 81 m2g-1, and r GO nanosheets are synthesized from graphite via graphene oxide(GO) as intermediate. After coupled with r GO, mesoporous In2O3 could maintain its ordered mesostructure. We subsequently investigate the gas-sensing properties of all the In2O3 specimens with or without r GO for different gases. The results exhibit the ordered mesoporous In2O3-r GO nanocomposite possesses significantly enhanced response to ethanol even at low concentration levels, superior over pure mesoporous In2O3 nanoparticles. Similar strategy could be extended to other ordered mesoporous metal oxide–r GO nanocomposite for improving the gas-sensing property.

关键词： Mesoporous material Indium oxideGraphene Nanocomposite Nanocasting Gas sensor

Construction of the Integration System of Cultural Resources and Products in Li Miao Region Tourism

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国际计算机前沿大会会议论文集 2021年第2期 293-302页

作者： Liping Chen Xu Wang xiaomei yang Sanya Aviation and Tourism College SanyaHainanChina

The conventional tourism resource product fusion system applied to the tourism culture in Li Miao region has the deficiency of low integration rate and poor integrity of *** solve the problem,the fusion system of cultural resources and products in Li Miao region tourism is *** on their determination of the mathematical relationship,the cultural resources and product information in Li Miao region tourism was introduced,and their fusion can be *** on the confirmation of the fusion mechanism of cultural resources and products and the procedure of the fusion system,the proposed fusion system was *** experimental data show that the proposed tourism resource product fusion system is 38.9%higher than the conventional system,and the construction integrity is improved by 31.7%.It is proved the effectiveness of the construction of the fusion system of cultural resources and products in Li Miao region tourism.

关键词： Li Miao region tourism Cultural resources Product integration System construction