焦作市连阴雨天气分析与预报     

闫小利刘跃红  李艳红卢学锋 《气象与环境科学》2004,(4):18-19

利用1980～2002年气象资料,分析了焦作市连阴雨天气的气候特征和环流特征,并在寻找出连阴雨预报和结束指标的基础上,利用T213预报场确定相似场,通过计算相似系数,作出连阴雨天开始、持续和结束的预报.  相似文献   

焦作地区近30年气候变化特征     

毋全喜  卢学锋 《气象与环境科学》2005,(4):30-30

利用焦作地区7站点1971～2000年整编资料和1961～1990年整编资料分析结果表明焦作地区年平均气温增高,年降水量大部分地区减少,日照时数全区皆减少.夏季降水量大部分地区明显增加,秋、冬季大部分地区明显减少,春季增多占多数.平均气温冬、春、秋普遍增高,夏季大部分降低.日照时数则四季皆减少.  相似文献   

血府逐瘀汤加减结合西医治疗带状疱疹后遗神经痛临床疗效的Meta分析          下载免费PDF全文

陈均莉  张仁怡  李艳红 《应用海洋学学报》2023,39(5):116

评价血府逐瘀汤加减结合西医治疗带状疱疹后遗神经痛（PHN）的临床疗效。方法：使用计算机检索中国知网（CNKI）、万方数据（WANFANG DATA）、中国生物医学文献服务系统（SinoMed)、维普中文科技期刊数据库(VIP)、PubMed、Cochrane library等数据库中血府逐瘀汤加减结合西医治疗PHN的临床随机对照试验（RCT）,检索时间为自建库至2022年2月1日。采用RevMan5.3软件进行Meta分析。结果：共纳入20篇RCTs,文献质量偏低,总样本量为1586 例。Meta分析结果显示,2组临床疗效［RR=1.20,95%CI(1.15,1.25),P<0.00001］、视觉模拟评分法（VAS）评分［MD=-1.91,95%CI（-2.30,-1.53）,P<0.00001］、疼痛减轻时间［MD=-2.18,95%CI（-2.56,-1.80）,P<0.00001］、痊愈率［RR=1.76,95%CI(1.49,2.07),P<0.00001］比较,差异均有统计学意义。结论：血府逐瘀汤结合西医疗PHN较单用西医治疗更具优势。  相似文献   

广西青狮潭水库水体喹诺酮类抗生素的分布特征及生态风险评价     

莫苑敏  黄亮亮  王倩  黄健  邓明星  邹琦  GUYENManhlinh  李艳红 《湖泊科学》2019,31(1):124-133

利用高效液相色谱法对桂林市青狮潭水库喹诺酮类抗生素（氧氟沙星（OFX）、诺氟沙星（NOR）、环丙沙星（CIP）、恩诺沙星（ENR））进行监测,并分析其污染来源和生态风险.结果表明：青狮潭水库水体中氧氟沙星、诺氟沙星、环丙沙星和恩诺沙星的检出浓度范围分别为50.00~660.13、3.70~5.00、3.49~6.22和4.59~6.06 ng/L;与国内河流抗生素浓度水平相比,青狮潭水库水体中喹诺酮类抗生素浓度处于中等偏低水平;青狮潭水库水体喹诺酮类抗生素浓度与水体理化性质的相关性分析表明：NOR浓度与pH相关性极显著、与浊度相关性显著,CIP浓度与总磷浓度相关性显著,OFX和ENR浓度与理化指标无显著相关性;生态风险评价结果表明青狮潭水库东湖区、西湖区水体中OFX存在高风险,NOR、CIP与ENR处于中等风险水平.  相似文献   

Combined effects of water temperature and copper ion concentration on catalase activity in Crassostrea ariakensis     

王辉  杨洪帅  刘加慧  李艳红  刘志刚 《中国海洋湖沼学报》2015,33(4):905-912

A central composite experimental design and response surface method were used to investigate the combined effects of water temperature(18–34℃) and copper ion concentration(0.1–1.5 mg/L) on the catalase(CAT) activity in the digestive gland of C rassostrea ariakensis. The results showed that the linear effects of temperature were significant(P 0.01), the quadratic effects of temperature were significant( P 0.05), the linear effects of copper ion concentration were not significant(P 0.05), and the quadratic effects of copper ion concentration were significant(P 0.05). Additionally, the synergistic effects of temperature and copper ion concentration were not significant(P 0.05), and the effect of temperature was greater than that of copper ion concentration. A model equation of CAT enzyme activity in the digestive gland of C. ariakensis toward the two factors of interest was established, with R 2, Adj. R 2 and Pred. R 2 values as high as 0.943 7, 0.887 3 and 0.838 5, respectively. These findings suggested that the goodness of fit to experimental data and predictive capability of the model were satisfactory, and could be practically applied for prediction under the conditions of the study. Overall, the results suggest that the simultaneous variation of temperature and copper ion concentration alters the activity of the antioxidant enzyme CAT by modulating active oxygen species metabolism, which may be utilized as a biomarker to detect the effects of copper pollution.  相似文献   

基于马尔科夫模型的新疆甘家湖湿地景观格局模拟与预测     

李磊  李艳红 《湿地科学与管理》2013,(3):52-55

以干旱、半干旱区生态脆弱的甘家湖湿地为研究对象,基于2000年和2008年第2期Land-sat TM/ETM为数据源,运用ARCGIS等地理信息系统分析软件,结合实地考察对研究区进行景观分类,确定转移概率矩阵,制作景观格局空间转移格局图,并将马尔科夫过程引入到湿地景观格局的预测和分析,对湿地各景观要素面积进行分析和动态预测。结果表明:①新疆甘家湖湿地功能正在逐步退化,表现于水域面积和沼泽地面积的减小,盐碱地面积不断扩大;②随着对湿地保护的加强,近些年来湿地环境有明显改善,基于马尔科夫模型的预测,在未来的近50年内,沙地面积趋于减少,由2008年的27.4%减少到2060的21.98%,草地面积趋于增加,由2008年的0.6%上升到2060年的1.33%,局部地区的湿地环境有所转好。  相似文献   

地理国情普查成果在海绵城市中的应用初探     

李艳红  胡勇 《测绘与空间地理信息》2017,(8)

分析比较了地理国情普查成果中相关属性特征和海绵城市建设中相关控制指标,为海绵城市建设提供了新的数据来源,同时也为地理国情普查成果应用拓展了思路,为城市建设的生态文明和可持续发展提供了新想法。  相似文献   

温度和铜离子浓度对近江牡蛎超氧化物岐化酶活力的联合效应     

王辉  杨洪帅  刘加慧  李艳红  刘志刚 《海洋学报(英文版)》2016,35(4):51-57

Superoxide dismutase(SOD) is a crucial antioxidant enzyme playing the first defense line in antioxidant pathways against reactive oxygen species in various organisms including marine invertebrates. There exist mainly two specific forms, Cu/Zn-SOD(SOD1) and Mn-SOD(SOD2), in eukaryotes. SODs are known to be concurrently modulated by a variety of environmental stressors. By using central composite experimental design and response surface method, the joint effects of water temperature(18–34°C) and copper ion concentration(0.1–1.5 mg/L) on the total SOD activity in the digestive gland of Crassostrea ariakensis were studied. The results showed that the linear effect of temperature was highly significant(P0.01), the quadratic effect of temperature was significant(P0.05); the linear effect of copper ion concentration was not significant(P0.05), while the quadratic effect of copper ion concentration was highly significant(P0.01); the interactive effect of temperature and copper ion concentration was not significant(P0.05); the effect of temperature was greater than that of copper ion concentration. The model equation of digestive gland SOD enzyme activity towards the two factors of interest was established, with R2 and predictive R2 as high as 0.961 6 and 0.820 7, respectively, suggesting that the goodness-offit to experimental data be very satisfactory, and could be applied to prediction of digestive gland SOD activity in C. ariakensis under the conditions of the experiment. Our results would be conducive to addressing the health of aquatic animals and/or to detecting environmental problems by taking SOD as a potential bioindicator.  相似文献   

预生成思想在地理信息服务中的应用研究   总被引：3，自引：0，他引：3  

李海亭  费立凡  彭青山  李艳红 《测绘信息与工程》2009,34(1):31-32

从瓦片地图、栅格索引、公交换乘三方面阐述了预生成思想在地理信息服务中的应用，论证了预生成思想在提高地理信息系统的响应速度方面具有重大的意义。  相似文献   

对原平市区域建设用地集约利用的评价     

霍卫东  李艳红  王治清 《华北国土资源》2015,(1):58-60

选择能够反映原平市土地利用状况、土地利用与经济社会发展关系的指标,进行定量评价,进而真实反映原平市的土地利用实际情况。根据利用强度指数、增长耗地指数、用地弹性指数、管理绩效指数等指标计算结果,评价原平市的土地集约利用水平。对评价结果进行综合分析,提出进一步提高原平市城市建设用地集约利用水平的政策建议。  相似文献