检索结果-南通市图书馆

Spatiotemporal Evolution of Ecological Quality in Typical Karst Ecologically Fragile Areas Based on Remote Sensing Ecological Indexes

在线全文

学校读者我要写书评

暂无评论

Meteorological and Environmental Research 2024年第2期15卷 22-28页

作者： Denghong HUANG Zhiying zhang zhenzhen zhang School of Karst Science/School of Geography&Environmental Science Guizhou Normal UniversityGuiyang 550025China State Engineering Technology Institute for Karst Desertification Control Guiyang 550025China

Fast and effective remote sensing monitoring is an important means for analyzing the spatio-temporal changes in ecological quality in fragile karst *** study focuses on Guanling Autonomous County,a national-level demonstration county for comprehensive desertification *** on Landsat TM/OLI remote sensing image data from 2005,2010,2015,and 2020,remote sensing ecological indices were used to analyze the spatio-temporal changes in ecological quality in Guanling Autonomous County from 2005 to *** results show that:①the variance contribution rates of the first principal component for the four periods were 66.31%,71.59%,63.18%,and 75.24%,indicating that PC1 integrated most of the characteristics of the four indices,making the RSEI suitable for evaluating ecological quality in karst mountain areas;②the remote sensing ecological index grades have been increasing year by year,with an overall trend of improving ecological *** area of higher-grade ecological quality has increased spatially,while fragmented patches have gradually decreased,becoming more concentrated in the low-altitude areas in the northwest and east,and there is a trend of expansion towards higher-altitude areas;③the ecological environment quality in most areas has improved,with the improvement in RSEI spatio-temporal variation becoming more noticeable with increasing *** of higher-grade quality appeared in 2010,and the range of higher-grade quality expanded with increasing slope.

关键词： Ecological quality Remote sensing ecological index Karst mountainous area Ecological fragility Guanling Autonomous County

Spatiotemporal Evolution of Ecosystem Service Value in Caohai National Nature Reserve

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Meteorological and Environmental Research 2024年第2期15卷 14-21页

作者： Denghong HUANG zhenzhen zhang Jintong REN Guizhou University of Engineering Science/Guizhou Province Key Laboratory of Ecological Protection and Restoration of Typical Plateau Wetlands Bijie 551799China School of Karst Science Guizhou Normal UniversityGuiyang 550025China

Wetland ecosystems are important regulators of global climate *** the spatiotemporal changes and driving mechanisms of their ecosystem service values(ESV)is beneficial for the sustainable development of *** paper uses the equivalent factor method,based on land use changes,to reveal the spatiotemporal evolution of the ecosystem service value in the Caohai National Nature Reserve(CNNR).The results show the following:①from 2000 to 2020,there was a significant decrease in the core zone s arable land area,with an increase in forest and water *** land mainly increased in the experimental area,and the grassland area showed a fluctuating change of first increasing and then decreasing;②in 2000,2010,and 2020,the ecosystem service value of the study area was 302 million,296 million,and 325 million yuan,respectively,showing a trend of fluctuating growth,with the value of wetland ecosystems playing a dominant role;③regulatory services are the main contributors to the ecosystem service value in the study area,with a contribution rate of 60%.Hydrological regulation is the ecosystem function with the highest value in wetland ecosystem services,contributing more than 35%to the ESV in all three periods;④in terms of spatial distribution,the core zone s ecosystem service value is *** at the total ecosystem service value of the region,the core zone>the experimental area>the buffer *** terms of ESV per unit area,the core zone(89000 yuan/hm^(2))is significantly higher than the buffer zone(39100 yuan/hm^(2))and the experimental area(15800 yuan/hm^(2)).The study can provide a basis for research and spatial management of ecosystem services in wetland ecosystems and nature reserves.

关键词： Ecosystem service value(ESV) Equivalent factor method Land use change Wetland ecosystem CNNR

Spatiotemporal Evolution of Ecological Quality in Alpine Freshwater Lake Nature Reserves in the Past 20 Years

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Meteorological and Environmental Research 2024年第2期15卷 29-36页

作者： Denghong HUANG Chenli LIAO zhenzhen zhang Jintong REN Guizhou University of Engineering Science/Guizhou Province Key Laboratory of Ecological Protection and Restoration of Typical Plateau Wetlands Bijie 551799China School of Karst Science Guizhou Normal UniversityGuiyang 550025China School of Geography&Environmental Science Guizhou Normal UniversityGuiyang 550025China

The Caohai Nature Reserve is one of the three major plateau freshwater lakes in *** the 1950s,human activities such as land reclamation and population relocation have greatly damaged Caohai.A rapid evaluation of the spatiotemporal evolution trend of the ecological quality of the Caohai Nature Reserve is significant for the maintenance and construction of the ecosystem in this *** research is based on the Google Earth Engine(GEE)remote sensing cloud computing *** TM/OLI images from May to October in five time periods:2000-2002,2004-2006,2009-2011,2014-2016,and 2019-2021 were obtained to reconstruct the optimal cloud image set by averaging the images in each time *** constructing four ecological indicators:Greenness(NDVI),Wetness(Wet),Hotness(LST),and Dryness(NDBSI),and using Principal Component Analysis(PCA)method to obtain the Remote Sensing Ecological Index(RSEI)for the corresponding years,the spatiotemporal variation of ecological quality in the Caohai Nature Reserve over 20 years was *** results indicate:①the mean value of RSEI increased from 0.460 in 2000-2002 to 0.772 in 2019-2021,a 67.83%increase,indicating a significant improvement in the ecological quality of the reserve over the 20 years;②from the perspective of functional zoning of the Caohai Nature Reserve,the ecological quality of the core area showed a degrading trend,while the ecological quality of the buffer zone and experimental zone significantly improved;③with the implementation of ecological restoration projects,the ecological quality of the reserve gradually recovered and improved from 2014 to *** trend of RSEI value changes is well correlated with human interventions,indicating that the PCA-based RSEI model can be effectively used for ecological quality assessment in lake areas.

关键词： Ecological restoration Ecological quality Remote sensing ecological index Google Earth Engine Caohai Nature Reserve

Polycystic ovary syndrome: pathogenic mechanisms and nutritional therapeutic strategies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年

作者： Yanyan Zhao Bin Liu Junying Zhao Yanpin Liu Hang Pan Yuying Yuan Xiaoyan Tian Weicang Qiao zhenzhen zhang Lijun Chen School of Public Health Shandong Second Medical University National Engineering Research Center of Dairy Health for Maternal and Child Beijing Sanyuan Foods Co.Ltd. Beijing Engineering Research Center of Dairy Beijing Technical Innovation Center of Human Milk Research Beijing Sanyuan Foods Co.Ltd. Key Laboratory of Dairy Science Ministry of Education Food Science College Northeast Agricultural University

Polycystic ovary syndrome (PCOS) is the most common endocrine disease afflicting women of childbearing age. It is characterized by irregular menstruation， clinical or biochemical hyperandrogenemia， and polycystic ovary morphology. As a complex endocrine-metabolic syndrome， PCOS shares several endocrine-metabolic features with the metabolic syndrome (MS)， with insulin resistance at the core of their pathogenic mechanisms. PCOS and MS are interrelated and thus have similarities in treatment. Currently， the common treatment modalities for both are lifestyle intervention， medication， and surgery. More studies have shown that lifestyle intervention and regulation of intestinal flora are more effective and sustainable. However， progress towards treatment and cure is hampered by unclear etiology and mechanisms. This review aimed to summarize the relationship between PCOS and MS， the pathogenesis of metabolic disorders， and the current nutritional therapeutic strategies， especially lifestyle modifications and modulation of intestinal flora. Lifestyle interventions combined with the regulation of gut flora can be a new perspective for treatment. This perspective has a positive significance in the early diagnosis， adoption of personalized treatment plans， and prevention of complications in PCOS and MS. The need to prevent the occurrence of MS in patients with PCOS should be emphasized.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

陶行知的乡村教育情怀及其现实意蕴

教师教育学报 2024年第3期11卷 47-54页

作者：张珍珍合肥师范学院教育与心理科学学院安徽合肥230601

陶行知乡村教育情怀是以陶行知为核心、以其弟子为代表的致力于乡村改造的教师群体所表现出来的精神特质,具有教育救国的政治抱负、乡村改造的教育信仰和心系农民的平民情感等内涵表征。这种乡村教育情怀是在“知—情—行”的实践逻辑... 详细信息

陶行知乡村教育情怀是以陶行知为核心、以其弟子为代表的致力于乡村改造的教师群体所表现出来的精神特质,具有教育救国的政治抱负、乡村改造的教育信仰和心系农民的平民情感等内涵表征。这种乡村教育情怀是在“知—情—行”的实践逻辑中被蕴育与升华的。知,即以乡村改造为己任的具身认知;情,即回馈乡土的情感共鸣;行,即全域拓展乡村教育实践。乡村教育情怀既是陶行知等人进行乡村教育改造的动力与内驱力,亦是他们在改造乡村的教育实践中蕴育而出的强烈的教育情感。改造乡村的教育实践既是陶行知等人将强烈的乡村教育情感付诸行动的体现,也是他们将这种情怀不断升华的途径。通过分析与思考陶行知乡村教育情怀的内涵与实践价值,探析出其在培育新时代教师乡村教育情怀方面的现实意义,即要在乡村振兴背景下,以政治关心为底色、以乡土情感为支撑、以知行合一为途径来培养教师乡村教育情怀。

关键词：陶行知乡村教育情怀内涵特质实践蕴意现实意蕴乡村改造

陶行知家庭教育的目标内涵、践行之法及价值意蕴

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

盐城师范学院学报（人文社会科学版） 2024年第3期44卷 69-76页

作者：张珍珍合肥师范学院教育与心理科学学院安徽合肥230601

“真人”是陶行知对理想人格的设定,也是他在家庭教育实践中为陶氏四子设立的培养目标。“做真人”从阶级、时代和个体三种属性将其内涵表征为做主人、做国民和做“整个的人”。陶行知将“教学做合一”方法论延伸到家庭教育实践中,他注... 详细信息

“真人”是陶行知对理想人格的设定,也是他在家庭教育实践中为陶氏四子设立的培养目标。“做真人”从阶级、时代和个体三种属性将其内涵表征为做主人、做国民和做“整个的人”。陶行知将“教学做合一”方法论延伸到家庭教育实践中,他注重言传身教,擅长随才造就,讲究治事做事,将陶氏四子培养成优秀的人才。当下,我国家庭教育需要解决一些问题,如:农村留守儿童缺失家庭教育,城镇家庭教育异化,家庭教育缺乏有效指导,家庭教育目标重成才轻成人等。开展家庭教育可以从陶行知家庭教育实践中汲取经验,充分发挥所有家庭成员的作用,设立成人与成才并重的家庭教育目标,运用科学有效的家庭教育方法。

关键词： “做真人” 教学做合一陶行知家庭教育价值意蕴

基于5E教学模式的初中数学概念探究--以“一次函数”为例

在线全文

学校读者我要写书评

暂无评论

教育研究前沿（中英文版） 2024年第2期14卷 100-104页

作者：张珍珍黄冈师范学院

数学概念是数学知识的基础,是培养学生的核心素质和培养数学思想的重要根基。“5E”教学模式是一种高度抽象、高度复杂的教学模式,它在教学过程中非常重视对概念知识的自主建构和探究,因此在各科的教育界引起了极大的重视。本研究将“5... 详细信息

数学概念是数学知识的基础,是培养学生的核心素质和培养数学思想的重要根基。“5E”教学模式是一种高度抽象、高度复杂的教学模式,它在教学过程中非常重视对概念知识的自主建构和探究,因此在各科的教育界引起了极大的重视。本研究将“5E”教学模式与初中数学概念教学相结合,以“一次函数”为例,对“5E”教学模式的几个阶段在初中数学概念教学中的应用进行教学探究,为初中数学概念教学提供有价值的理论指导。

关键词：数学概念 5E教学模式一次函数

喀斯特石漠化治理生态产品价值实现及其对乡村振兴的启示

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

生态学报 2024年第2期44卷 488-496页

作者：熊康宁赵榕张珍珍颜佳旺李永垚贵州师范大学喀斯特研究院/贵州省喀斯特石漠化防治与衍生产业工程实验室贵阳550001

生态产品价值实现是进一步开展石漠化治理、实现乡村振兴的重要抓手。基于石漠化治理与生态产品价值实现的已有研究和具体实践,对石漠化治理生态产品概念进行了界定,并将石漠化治理生态产品分为生态空间产品、生态要素产品、生态权益产... 详细信息

生态产品价值实现是进一步开展石漠化治理、实现乡村振兴的重要抓手。基于石漠化治理与生态产品价值实现的已有研究和具体实践,对石漠化治理生态产品概念进行了界定,并将石漠化治理生态产品分为生态空间产品、生态要素产品、生态权益产品及生态标签产品。引入“沙漏模型”阐明了石漠化治理生态产品价值实现机理,通过分析生态产品在供给端与消费端之间的交易过程揭示了石漠化治理生态产品价值实现机制,明确了石漠化治理生态产品价值实现的影响因素,认为未来应加强对石漠化治理生态产品开发、经营及其产业形成的研究,最后提出了石漠化治理生态产品价值实现对乡村振兴的启示。

关键词：生态产品价值实现机理供需机制石漠化治理乡村振兴

维普期刊数据库博看期刊

双氢青蒿素对糖尿病大鼠创面炎症反应和愈合的影响

在线全文

学校读者我要写书评

暂无评论

中药新药与临床药理 2024年第7期35卷 944-951页

作者：刘璨宇李佳杰彭珍雪张瑾张珍珍张选奋兰州大学第二医院整形外科甘肃兰州730030 兰州大学第二临床医学院甘肃兰州730030

目的探究双氢青蒿素(dihydroartemisinin,DHA)对糖尿病大鼠创面炎症反应和愈合的影响。方法用卡波姆980、吐温-80、甘油、超纯水、氢氧化钠配制基质软膏,加入双氢青蒿素、尼泊金乙酯搅拌均匀,即得双氢青蒿素软膏。50只SPF级SD大鼠,采用... 详细信息

目的探究双氢青蒿素(dihydroartemisinin,DHA)对糖尿病大鼠创面炎症反应和愈合的影响。方法用卡波姆980、吐温-80、甘油、超纯水、氢氧化钠配制基质软膏,加入双氢青蒿素、尼泊金乙酯搅拌均匀,即得双氢青蒿素软膏。50只SPF级SD大鼠,采用链脲佐菌素腹腔注射法制作糖尿病大鼠模型,成功造模44只。用直径2.0 cm圆形打孔器在大鼠背部制造全层皮肤缺损创面。用随机数表法将36个创面分为4组,每组9个,分别外用5%、10%、15%双氢青蒿素软膏及基质软膏(对照组),每天1次,连续14 d。第3、7和14天观察创面愈合情况,然后切取包含0.2 cm创缘和创面组织,HE染色观察组织学变化,Masson染色观察胶原变化,ELISA法检测白细胞介素6(interleukin 6,IL-6)、白细胞介素10(interleukin 10,IL-10)和肿瘤坏死因子α(tumor necrosis factor-α,TNF-α)的含量。另外8只随机分为10%双氢青蒿素组和对照组,切取第7天时的创面组织,高通量测序技术进行转录组测序,筛选两组间的差异表达基因(differentially expressed genes,DEGs),进行基因本体(gene ontology,GO)功能富集分析及京都基因与基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)富集分析。采用SPSS 27.0统计软件对数据进行单因素方差分析。结果不同浓度双氢青蒿素组的创面愈合率均优于对照组,10%双氢青蒿素组最明显(P<0.05)。与对照组比较,各双氢青蒿素组在第7、14天时炎症细胞浸润减少,胶原纤维面积增加(P<0.05)。各双氢青蒿素组IL-6、TNF-α表达明显低于对照组(P<0.05);而IL-10表达明显高于对照组(P<0.05)。差异基因火山图显示,10%双氢青蒿素组明显上调缺氧诱导因子1α(hypoxia inducible factor 1α,Hif-1α)、Smad同源物12(Smad homolog 12,Smad12)、β-防御素4(β-defensin 4,Defb4)等抗炎、抗菌基因。GO功能富集分析显示,10%双氢青蒿素组在炎症反应、免疫反应和对细菌的防御反应等方面显著富集。KEGG富集分析显示,10%双氢青蒿素组在趋化因子信号通路和NOD样受体信号通路等方面显著富集。结论双氢青蒿素可能通过减少炎症细胞浸润、调节炎症因子、抗炎抗菌基因、趋化因子信号通路和NOD样受体信号通路等来抑制过度的炎症反应,从而加速创面愈合。

关键词：糖尿病双氢青蒿素炎症反应创面转录组测序大鼠