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基于因子分析的广东省各区县热浪抵抗力分析

中山大学学报（自然科学版）（中英文） 2024年第4期63卷 1-8页

作者：郑楷灿廖威林中山大学地理科学与规划学院广东广州510006

在全球气候变暖背景下,热浪事件发生的频率不断增加,给人居环境和人类健康带来了不利影响。已有研究表明,自然因素和社会经济因素均会影响热浪事件的强度。因此,综合考虑自然、社会和经济指标来反映对热浪事件的抵抗力尤为重要。本研究... 详细信息

在全球气候变暖背景下,热浪事件发生的频率不断增加,给人居环境和人类健康带来了不利影响。已有研究表明,自然因素和社会经济因素均会影响热浪事件的强度。因此,综合考虑自然、社会和经济指标来反映对热浪事件的抵抗力尤为重要。本研究聚焦于广东省各区县,选取了涉及以上3个方面的指标,使用因子分析方法提取到3个公因子,分别为个体抵抗因子、公共抵抗因子和自然抵抗因子,其累计贡献率达到90.029%,能够较为准确地反映区县尺度下热浪事件的抵抗能力。结果表明,热浪抵抗力在广东省内存在明显的不平衡性,抵抗能力强的区县集中在珠三角地区。根据因子得分进行特征组合,可将广东省内各区县分为5类,分别是抵抗力脆弱区、个体抵抗力提高区、公共抵抗力提高区、自然抵抗力提高区和抵抗力强劲区。大部分区县在热浪抵抗力上既存在优势方面,也存在不足之处。本研究针对不同类别的区县提出相应建议,以期为缓解热浪事件影响提供科学依据。

关键词：因子分析县级尺度热浪抵抗力多源数据

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Quality Control and Evaluation of the Observed Daily Data in the North American Soil Moisture Database

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Journal of Meteorological Research 2019年第3期33卷 501-518页

作者： weilin liao Dagang WANG Guiling WANG Youlong XIA Xiaoping LIU School of Geography and Planning Sun Yat-sen University Guangzhou 510275 China Guangdong Key Laboratory for Urbanization and Geo-simulation Sun Yat-sen University Guangzhou 510275 China Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute Sun Yat-sen University Guangzhou 510275 China Department of Civil and Environmental Engineering University of Connecticut Storrs CT 06269 USA I. M. Systems Group Environmental Modeling Center National Centers for Environmental Prediction College Park MD 20740 USA

The North American Soil Moisture Database (NASMD) was initiated in 2011 to assemble and homogenize in situ soil moisture measurements from 32 observational networks in the United States and Canada encompassing more than 1800 stations. Although statistical quality control (QC) procedures have been applied in the NASMD, the soil moisture content tends to be systematically underestimated by in situ sensors in frozen soils, and using a single maximum threshold (i.e., 0.6 m3 m-3) may not be sufficient for robust QC because of the diverse soil textures in North America. In this study, based on the in situ soil porosity and North American Land Data Assimilation System phase 2 (NLDAS-2) Noah soil temperature, the simple automated QC method is revised to supplement the existing QC approach. This revised QC method is first validated based on the assessment at 78 of the Soil Climate Analysis Network (SCAN) stations where the manually checked data are available, and is then applied to all stations in the NASMD to produce a more strict quality-controlled dataset. The results show that the revised automated QC procedure can flag the spurious and erroneous soil moisture measurements for the SCAN stations, especially for those located in high altitudes and latitudes. Relative to station measurements in the original NASMD, the quality-controlled data show a slightly better agreement with the manually checked soil moisture content. It should be noted that this quality-controlled dataset may be over-flagged for some valid soil moisture measurements due to potential errors of the soil temperature and soil porosity data, and validation in this study is limited by the availability of benchmark soil moisture data. The updated QC and additional validation will be desirable to boost confidence in the product when high-quality data become available in the future.

关键词： North American Soil Moisture Database (NASMD) quality control soil moisture North American Land Data Assimilation System phase 2 (NLDAS-2) soil temperature soil porosity

Solvent-Free Synthesis of 5-Alkenyl-2,2-butylidene-1, 3-dioxane-4,6-diones under Ultrasonic Irradiation with o-Phthalimide-N-Sulfonic Acid as Catalyst

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International Journal of Organic Chemistry 2013年第4期3卷 275-279页

作者： Chunhua Lin Zhaohui Xu weilin liao Fine Chemical Key Laboratory of Jiangxi Province Nanchang China

5-Alkenyl-2,2-butylidene-1,3-dioxane-4,6-diones were synthesized by the Knoevenagel condensation reaction of aromatic aldehydes with 2,2-butylidene-1,3-dioxane-4,6-dione using o-phthalimide-N-sulfonic acid as catalyst, without solvent under ultrasonic irradiation. The present method has some notable advantages such as mild reaction conditions, short reaction times, less catalyst dosage and high yields with the green aspects by avoiding toxic catalysts and solvents. Further, the catalyst can be reused for five times without any noticeable decrease in the catalytic activity.

关键词： o-Phthalimide-N-Sulfonicacid 5-Alkenyl-2 2-butylidene-1 3-dioxane-4 6-diones Aromatic Aldehydes Knoevenagel Condensation

Unequal urban heat burdens impede climate justice and equity goals

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The Innovation 2023年第5期4卷 7-8页

作者： Hui Zhang Ming Luo Tao Pei Xiaoping Liu Lin Wang Wei Zhang Ljie Lin Erjia Ge Zhen Liu weilin liao School of Geography and Planning.Sun Yat-sen University Guangzhou 510006China Insttute of Geographical Sciences and Natural Resources Research Chinese Academy of SciencesBeijng 100101China a Instute of Atmospheric Physics Chinese Academy of SciencesBeiing 100029China Department of Plants Soils and limateUtah State UniversityLoganUT 84322USA School of Management Guangdong University of Technology Guangzhou 510520China Dalla Lana School of Public Health University of TorontoTorontoON M5T-3M7Canada Center for Climate Physics Institute for Basic ScienceBusan 46241Republic of Korea

Extreme heat is among the deadliest of weather-related hazards,exerting far-reaching impacts on the natural environment and human society *** risk has been rising worldwide over the past decades,particularly in densely populated urban settlements in which more than half the world’s population live.1,2 This rise is primarily attributed to anthropogenic greenhouse gas(GHG)emissions,of which the dominant share is contributed by the Global North.1 The Global North comprises economically developed countries with higher levels of industrialization,technology,infrastructures,energy consumption,and GHG emissions(e.g.,North America and West Europe)whose cities are major emission hotspots.1 Besides,emission transfers via international trade from the Global South,encompassing countries with lower economic development and energy consumption,higher poverty,and more vulnerable infrastructures(e.g.,India and Brazil)compared with the Global North,contribute a nonnegligible share of GHGs.

关键词： urban goals emissions

Projections of land use changes under the plant functional type classification in different SSP-RCP scenarios in China

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Science Bulletin 2020年第22期65卷 1935-1947,M0004页

作者： weilin liao Xiaoping Liu Xiyun Xu Guangzhao Chen Xun Liang Honghui Zhang Xia Li Guangdong Key Laboratory for Urbanization and Geo-simulation School of Geography and PlanningSun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China School of Geography and Information Engineering China University of GeosciencesWuhan 430078China College of Resources and Environmental Sciences Hunan Normal UniversityChangsha 410081China Guangdong Guodi Planning Science Technology Co. LtdGuangzhou 510075China School of Geographic Sciences East China Normal UniversityShanghai 200241China

Land use projections are crucial for climate models to forecast the impacts of land use changes on the Earth’s ***,the spatial resolution of existing global land use projections(e.g.,0.25°×0.25°in the Land-Use Harmonization(LUH2)datasets)is still too coarse to drive regional climate models and assess mitigation effectiveness at regional and local *** generate a high-resolution land use product with the newest integrated scenarios of the shared socioeconomic pathways and the representative concentration pathways(SSPs-RCPs)for various regional climate studies in China,here we first conduct land use simulations with a newly developed Future Land Uses Simulation(FLUS)model based on the trajectories of land use demands extracted from the LUH2 *** this basis,a new set of land use projections under the plant functional type(PFT)classification,with a temporal resolution of 5 years and a spatial resolution of 5 km,in eight SSP-RCP scenarios from 2015 to 2100 in China is *** results show that differences in land use dynamics under different SSP-RCP scenarios are jointly affected by global assumptions and national ***,with improved spatial resolution,the data produced in this study can sufficiently describe the details of land use distribution and better capture the spatial heterogeneity of different land use types at the regional *** highlight that these new land use projections at the PFT level have a strong potential for reducing uncertainty in the simulation of regional climate models with finer spatial resolutions.

关键词： Land use change Plant functional type Future Land Uses Simulation(FLUS) Land use simulation SSP-RCP scenarios

右半结肠癌D_(3)淋巴清扫术与完整结肠系膜切除术的异同

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中华胃肠外科杂志 2021年第1期24卷 81-84页

作者：刁德昌廖伟林广东省中医院(广州中医药大学第二附属医院)结直肠外科广州510120

结肠癌D_(3)淋巴清扫术和完整结肠系膜切除术(CME)是目前全球的两大主流手术理念,从传入我国到发展,已有十余年的历史。但是,国内学术界对这两个手术的核心理念以及两者的异同,仍然有着许多不同的理解和误会,目前鲜见针对该问题进行过... 详细信息

结肠癌D_(3)淋巴清扫术和完整结肠系膜切除术(CME)是目前全球的两大主流手术理念,从传入我国到发展,已有十余年的历史。但是,国内学术界对这两个手术的核心理念以及两者的异同,仍然有着许多不同的理解和误会,目前鲜见针对该问题进行过专门探讨的文章。尤其对于右半结肠癌D_(3)和CME手术,国内学者的理解较为混乱,目前主要存在将两种理念相混淆的"D_(3)等同于CME"理念以及将两种概念进行优势互补的"D_(3)+CME"理念,前者把两者同一化,后者似乎把两者概念完全不同区别对待,孰是孰非,未达成共识。本文阐述右半结肠癌D_(3)手术和CME手术在提出背景、手术原理、手术范围以及根治效果等方面存在的较大差异,认为两者不属于同一概念,而且右半结肠癌CME手术范围大于且包含D3手术范围,两者也不属于互补关系。

关键词：结肠癌,右半 D_(3)根治术完整结肠系膜切除术手术原理

程序化理念指导下右半结肠癌根治术教学模式在进修医师培训中的应用

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国际医药卫生导报 2024年第19期30卷 3193-3196页

作者：卢新泉刁德昌汪佳豪李洪明易小江冯晓创廖伟林林佳鑫张雪阳广东省中医院胃肠外科广州510120 中山大学附属第六医院胃肠外科广州510655 中山市中医院肛肠科中山528400 广州中医药大学第二临床医学院广州510405

目的探讨程序化理念指导下右半结肠癌根治术教学模式在胃肠外科进修医师专业化培训中的应用效果。方法选取2021年1月至2024年3月于广东省中医院胃肠外科进修学习的45名男性医师进行随机对照试验。采用抽签法将其分为试验组23名[(32.1±1... 详细信息

目的探讨程序化理念指导下右半结肠癌根治术教学模式在胃肠外科进修医师专业化培训中的应用效果。方法选取2021年1月至2024年3月于广东省中医院胃肠外科进修学习的45名男性医师进行随机对照试验。采用抽签法将其分为试验组23名[(32.1±1.7)岁]和对照组22名[(32.0±2.0)岁]。两组年龄、学历水平、培训时长差异均无统计学意义(均P>0.05)。对照组采用传统教学方式教授腹腔镜右半结肠癌根治术的过程及要点,试验组教学方式则为程序化理念指导的右半结肠癌根治术。培训期满对两组进修医师进行理论及实操考核。比较两组满意率。采用t检验、Z检验和Fisher精确概率检验。结果两组各项理论考核成绩比较,差异均无统计学意义(均P>0.05)。在实操考核中,试验组膜解剖完整性、淋巴结清扫数量、术中出血量评分和总分均高于对照组(均P<0.05)。试验组总体满意率高于对照组[91.3%(21/23)比72.7%(16/22),P=0.029]。结论程序化理念指导下腹腔镜右半结肠癌根治术教学模式在胃肠外科进修医师的专业培训中是有效、可行的。

关键词：右半结肠癌程序化理念腹腔镜进修医师培训

Transcriptomic and bioinformatics analysis of the mechanism by which erythropoietin promotes recovery from traumatic brain injury in mice

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Neural Regeneration Research 2024年第1期19卷 171-179页

作者： weilin Tan Jun Ma Jiayuanyuan Fu Biying Wu Ziyu Zhu Xuekang Huang Mengran Du Chenrui Wu Ehab Balawi Qiang Zhou Jie Zhang Zhengbu liao Department of Neurosurgery The First Affiliated Hospital of Chongqing Medical UniversityChongqingChina

Recent studies have found that erythropoietin promotes the recovery of neurological function after traumatic brain ***,the precise mechanism of action remains unclea *** this study,we induced moderate traumatic brain injury in mice by intrape ritoneal injection of erythro poietin for 3 consecutive *** sequencing detected a total of 4065 differentially expressed RNAs,including 1059 mRNAs,92 microRNAs,799 long non-coding RNAs,and 2115circular *** Encyclopedia of Genes and Genomes and Gene Ontology analyses revealed that the coding and non-coding RNAs that were differentially expressed after traumatic brain injury and treatment with erythropoietin play roles in the axon guidance pathway,Wnt pathway,and MAPK *** competing endogenous RNA networks showed that regulatory relationship between the differentially expressed non-coding RNAs and *** the axon guidance pathway was repeatedly enriched,the expression of Wnt5a and Ephb6,key factors in the axonal guidance pathway,was ***6 expression decreased and Wnt5a expression increased after traumatic brain injury,and these effects were reversed by treatment with erythro *** findings suggest that erythro poietin can promote recove ry of nerve function after traumatic brain injury through the axon guidance pathway.

关键词： axon guidance bioinformatics analysis competing endogenous RNA erythropoietin Gene Ontology Kyoto Encyclopedia of Genes and Genomes non-coding RNA RNA sequencing transcriptomics traumatic brain injury

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尾矿砂流变特性及其对溃坝尾砂下泄影响研究

地下空间与工程学报 2015年第S1期11卷 282-287页

作者：廖威林周小文华南理工大学土木与交通学院广州510640 华南理工大学亚热带建筑科学国家重点实验室广州510640

通过对三种尾矿砂不同浓度(60%~80%)浆体进行流变试验,分析尾矿砂浆体的颗粒组成和浆体浓度对其流变特性的影响。在此基础上,以1#尾矿砂为例,利用ANSYS CFX流体动力学分析软件模拟尾矿库发生溃坝后,不同浓度的尾矿砂浆体在下游演进的情... 详细信息

通过对三种尾矿砂不同浓度(60%~80%)浆体进行流变试验,分析尾矿砂浆体的颗粒组成和浆体浓度对其流变特性的影响。在此基础上,以1#尾矿砂为例,利用ANSYS CFX流体动力学分析软件模拟尾矿库发生溃坝后,不同浓度的尾矿砂浆体在下游演进的情况。结果表明:以细颗粒为主的尾矿砂浆体,其剪切应力随剪切速率的增大而增大,而以粗颗粒为主的尾矿砂浆体,其剪切应力会出现先减小后增大的过程;对于同种尾矿砂浆体,在相同剪切速率条件下,浓度高的浆体剪切应力大;当剪切速率增大到一定程度时,可以用宾汉体流变方程来描述尾矿砂浆体的流变特性;在相同溃砂总量条件下,随着尾矿砂浆体浓度的增大,下泄尾砂的流动性变差,其流动时间及淹没范围均减小。

关键词：尾矿砂颗粒组成浓度流变特性溃坝