益心通络利水方对急性心肌梗死PCI术后心衰患者心肌重构的影响          下载免费PDF全文

王琳  谷万里  刘贯龙 《应用海洋学学报》2022,38(3):1

目的：观察益心通络利水方对急性ST段抬高型心肌梗死（STEMI）PCI术后心衰患者心肌重构的影响。方法：选取STEMI PCI术后心衰患者140 例,按照随机数字表法将其分为2组,每组各70 例。对照组采用西医常规治疗方案,治疗组在对照组基础上加用益心通络利水方治疗,2组均连续治疗4周。比较治疗后2组患者中医证候疗效,测量并比较治疗前后2组患者左房内径、左室内径、左室射血分数（LVEF）,并利用三维斑点追踪成像（3D-STI）技术观察左室整体纵向应变（GLS）、径向应变（GRS）及圆周应变（GCS）。结果：总有效率治疗组为92.8%（65/70）,对照组为74.3%（52/70）,组间比较,差异有统计学意义（P<0.05）;治疗后治疗组左房内径、左室内径、LVEF较治疗前均有改善,且较对照组改善明显,差异均有统计学意义（P<0.05）;2组GLS、GRS、GCS值治疗前后组内比较及治疗后组间比较,差异均有统计学意义（P<0.05或P<0.01）。结论：益心通络利水方能够改善STEMI PCI术后患者临床症状及心肌重构,提高心功能,3D-STI能够更早期、敏感、准确地评价介入术后心衰患者的心脏收缩功能。  相似文献   

台风“烟花”的主要特点和路径预报难点分析          下载免费PDF全文

王海平  董林  许映龙  聂高臻 《海洋气象学报》2022,42(1):83-91

对2021年第6号台风“烟花”的主要特点与路径预报重大调整过程中出现的难点问题进行分析和研究,得出主要结论如下。(1)“烟花”移动缓慢,是首个两次登陆浙江的台风,在浙北和杭州湾附近地区长时间滞留。(2)降雨影响范围广、累计降雨量大、大风持续时间长。(3)反映出来的重要难点问题有:当多数模式预报出现一致的偏差时,预报员难以做出订正,有必要开展对模式中台风重要影响系统(高空冷涡、热带对流层上层槽等)的预报检验工作;台风移速缓慢的定量程度难以把握,需要通过总结历史个例和敏感性试验等方法开展东侧台风对西侧台风移动缓慢影响的定量研究;西风带槽/脊对副热带高压退/进快慢的定量影响把握困难,影响北上台风转向点的预报,特别是当不同模式有分歧的时候预报难度更大。  相似文献   

FY-3气象卫星降水探测能力分析与展望          下载免费PDF全文

谷松岩  卢乃锰  吴琼  尹红刚  商建  孙逢林  陈林  张鹏 《海洋气象学报》2022,42(2):1-10

降水是全球能量/水循环中的重要过程。本文着重分析 FY-3 气象卫星降水探测能力,展望风云卫星后续规划中降水探测技术的发展前景。分析表明,以 FY-3 降水星为主星,与其他 FY-3 极轨卫星组成的 FY-3 气象卫星降水探测体系,在设计层面上,从载荷类型、数量、通道设置等方面均优于由美国发起并已在轨运行的全球降水测量(Global Precipitation Measurement,GPM)计划核心星的设计性能。FY-3 降水星设计装载 Ka / Ku 双频降水测量雷达,卫星轨道设计覆盖南北纬 50°范围内的中低纬地区,对影响我国区域的台风暴雨等强对流天气系统结构具有三维探测能力。FY-3 气象卫星星座的降水探测能力为气象防灾减灾提供了基础支撑。  相似文献   

实时交通数据支持下的医疗服务时空可达性分析     

徐皓  乔庆华  李艳红  陈国岭  刘佳  甘霖 《测绘通报》2023,(1):113-119

针对现有城市医疗服务可达性分析方法未考虑就医偏好,导致测算结果与居民实际感受相差较大的问题,本文提出了一种顾及时间和距离成本偏好的医疗服务时空可达性分析方法,并以武汉市中心城区为例进行了分析。试验结果表明,研究方法充分利用交通路况,兼顾了交通距离和通行时间对就医选择的影响,距离偏好在新方法中作用显著。该方法一方面可以体现不同时刻可达性差异,另一方面又强调了居民就医的时间和距离成本偏好,相比单一的时间或距离成本更具优势,分析结果更符合现实。  相似文献   

Research on Ecosystem Service Consumption in Guilin City     

ZHANG Changshun  XIE Gaodi  ZHEN Lin 《资源与生态学报(英文版)》2023,14(1):186-194

Research on ecosystem service consumption not only helps to reveal the utilization intensity and management level of the ecosystem in Guilin, but it also provides a scientific basis for ecosystem investment, trade, subsidies and taxation by the Guilin government departments. Based on household survey data of urban and rural ecological consumption, the physical quantity accounting method is adopted for multivariate statistical analyses, such as analysis of variance and multiple comparison. This analysis reveals the differences and changes in the consumption level, consumption structure and consumption pattern of the main ecological products in Guilin among the various counties. The results fit into four main themes. (1) The annual per capita consumption of the main ecological products in Guilin varies either extremely significantly or significantly among the counties, but the consumption level of ecological products varies according to the type of products. There are significant or extremely significant differences in the annual per capita consumption of cereals, melons and fruits, pork, poultry, beef and mutton, fresh eggs and milk between urban and rural residents. (2) There are extremely significant differences in the annual per capita consumption of fruits, pork, poultry, beef and mutton, fish, fresh milk and vegetable oil among urban residents in different counties. There are also extremely significant differences in the annual per capita consumption of cereals, pork, poultry and alcohol among rural residents in different counties, and significant differences in the annual per capita consumption of fresh eggs and milk. The consumption level of ecological products by urban and rural resident varies with the type of products. (3) The ecological consumption patterns of all counties in Guilin mainly follow the “cereal + vegetable + fruit + meat” pattern for urban residents and the “cereal + vegetable + meat” pattern for rural residents (except for the rural residents in Pingle, which show the “cereal + vegetable” pattern). The consumption structure of urban residents is better than that of rural residents. (4) There is a large gap between the ecological consumption of urban and rural residents in Guilin and China's recommended standards, except for cereals and meat. The main problems are excessive meat intake, and insufficient intake of dark vegetables, fruits, eggs, milk and fish. Therefore, we should make full use of forestland, grassland, water and other resources in the area, and vigorously develop fishery, fruit and vegetable production and herbivorous animal husbandry to meet people's ecological needs for dark fruits and vegetables, eggs, milk and fish in Guilin City.  相似文献   

Harmful algal bloom-forming dinoflagellate Prorocentrum donghaiense inhibits the growth and photosynthesis of seaweed Sargassum fusiformis embryos     

Wang  Caixia  Wang  Min  Chen  Binbin  Qin  Wenli  Lin  Lidong  Dai  Chuanjun  Yu  Hengguo  Li  Renhui  Zhao  Min  Ma  Zengling 《中国海洋湖沼学报》2021,39(6):2237-2251

Journal of Oceanology and Limnology - Harmful algal bloom (HAB) is an ecological disaster to local mariculture. At present, its impact on macrophytes has not been well studied. In this study, we...  相似文献   

贵妃鸡14周龄体尺与屠宰性能的典型相关分析     

杨芬霞  李乃宾  杜炳旺  陶林  陈洁波 《广东海洋大学学报》2014,(4):91-95

测定14周龄贵妃鸡的体尺与屠宰性能相关指标,通过简单相关和典型相关分析,研究贵妃鸡体尺与屠宰性能的相关关系。结果表明:贵妃鸡公母鸡14周龄体质量分别为1 120.67 g和845.33 g,公鸡的体尺和屠宰性能(全净膛质量除外)均高于母鸡(P0.01);体尺与屠宰性能指标间存在不同程度的相关性,其中有2对典型相关系数达到了显著水平(P0.05),典型相关系数分别为0.985和0.824,体尺和屠宰性能的相关性主要由胫围、龙骨长、屠体质量、体质量和半净膛质量间引起;贵妃鸡可通过体尺选择提高屠宰性能。  相似文献   

环渤海地区中心城市金融竞争力评价及辐射研究     

林晓  韩增林  郭建科  赵林 《地域研究与开发》2014,(6)

以环渤海地区中心城市为研究区域,通过建立城市金融竞争力评价指标体系,运用突变级数法、主成分分析法、层次分析法对环渤海地区中心城市金融竞争力进行综合评价,并通过威尔逊模型揭示了中心城市的辐射范围。环渤海地区中心城市金融发展不平衡,北京的城市金融竞争力遥遥领先于其他城市;环渤海地区并未形成一个紧密联系的金融辐射网络,金融一体化还不成熟,仍有金融盲区的存在;各中心城市在发挥自身优势的同时应打破地区间行政壁垒,优势互补,协同发展,带动环渤海地区金融发展。  相似文献   

土壤地球化学测量在辽宁省开原市小甸子银金多金属矿区的找矿效果     

时林  李明  崔永文 《盐湖研究》2014,(3):15-20

在勘查区内通过1∶10 000土壤地球化学测量工作发现多处异常,结合区内成矿地质条件及矿种属性可将异常划分为3个异常区带,即西部HT1、东部HT2、南部HT3。经地表探槽工程揭露部分异常与已知矿体较为吻合,并且在勘查区东部HT2-3异常带内新发现4条蚀变岩型Zn矿体。土壤地球化学测量在该区地质找矿中发挥了重要的指导作用,取得了良好的找矿效果。  相似文献   

Radiative forcing over China due to albedo change caused by land cover change during 1990–2010     

Jun Zhai  Ronggao Liu  Jiyuan Liu  Guosong Zhao  Lin Huang 《地理学报(英文版)》2014,24(5):789-801

Land cover change affects surface radiation budget and energy balance by chang- ing surface albedo and further impacts the regional and global climate. In this article, high spatial and temporal resolution satellite products were used to analyze the driving mechanism for surface albedo change caused by land cover change during 1990-2010. In addition, the annual-scale radiative forcing caused by surface albedo changes in China＇s 50 ecological regions were calculated to reveal the biophysical mechanisms of land cover change affecting climate change at regional scale. Our results showed that the national land cover changes were mainly caused by land reclamation, grassland desertification and urbanization in past 20 years, which were almost induced by anthropogenic activities. Grassland and forest area decreased by 0.60% and 0.11%, respectively. The area of urban and farmland increased by 0.60% and 0.19%, respectively. The mean radiative forcing caused by land cover changes during 1990-2010 was 0.062 W/m2 in China, indicating a warming climate effect. However, spatial heterogeneity of radiative forcing was huge among different ecological regions. Farmland conversing to urban construction land, the main type of land cover change for the urban and suburban agricultural ecological region in Beijing-Tianjin-Tangshan region, caused an albedo reduction by 0.00456 and a maximum positive radiative forcing of 0.863 WIm2, which was presented as warming climate effects. Grassland and forest conversing to farmland, the main type of land cover change for the temperate humid agricultural and wetland ecological region in Sanjiang Plain, caused an albedo increase by 0.00152 and a maximum negative radiative forcing of 0.184 W/m2, implying cooling climate effects.  相似文献