检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

建筑工程框架剪力墙结构主体工程施工技术

工程建设与设计 2024年第5期 220-222页

作者：王会俊山西三建集团有限公司第六工程处山西长治046000

框架剪力墙结构因具有布置灵活、抗荷载能力强等优势而在建筑工程中得到广泛应用。论文以某建筑工程为例,对框架剪力墙结构受力特性进行分析,重点探讨施工工艺要点,包含测量放线、钢筋工程、模板工程、结构转换层、混凝土工程的施工工艺... 详细信息

框架剪力墙结构因具有布置灵活、抗荷载能力强等优势而在建筑工程中得到广泛应用。论文以某建筑工程为例,对框架剪力墙结构受力特性进行分析,重点探讨施工工艺要点,包含测量放线、钢筋工程、模板工程、结构转换层、混凝土工程的施工工艺,以提高建筑框架剪力墙施工水平。

关键词：建筑工程框架剪力墙受力特性施工工艺

测绘新技术在矿山大比例尺地形图测绘中的应用研究

在线全文

学校读者我要写书评

暂无评论

世界有色金属 2024年第11期 142-144页

作者：王君慧天水三和数码测绘院有限公司宁夏分公司宁夏银川750000

本文首先介绍了倾斜摄影技术和激光雷达技术,其次对两种新技术在矿山大比例尺地形图测绘中的应用流程进行了深入分析,最后将两种技术结合用于某矿山大比例尺地形图的测绘之中,并用检测点完成地形图精度的检测。通过对检测结果分析可知,... 详细信息

本文首先介绍了倾斜摄影技术和激光雷达技术,其次对两种新技术在矿山大比例尺地形图测绘中的应用流程进行了深入分析,最后将两种技术结合用于某矿山大比例尺地形图的测绘之中,并用检测点完成地形图精度的检测。通过对检测结果分析可知,采用本文方案生产的地形图,其精度能够满足矿山1∶500地形图精度要求,并且效率高,成本低,具有一定的推广应用价值。

关键词：测绘新技术矿山测绘大比例尺地形图倾斜摄影技术机载激光雷达技术

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

新疆克孜勒河4种裂腹鱼形态差异比较

水生态学杂志 2024年第4期45卷 99-107页

作者：张瑞赵贺聂竹兰王俊辉林慧莉秦凯瑞蔡汝铭塔里木大学动物科学与技术学院新疆阿拉尔843300 新疆生产建设兵团塔里木畜牧科技重点实验室新疆阿拉尔843300 塔里木盆地生物资源保护利用兵团重点实验室——省部共建国家重点实验室培育基地新疆阿拉尔843300

对新疆克孜勒河(Kizil River)流域4种裂腹鱼形态差异和生长特性进行比较分析,从形态特征上为群体的划分提供科学数据,为裂腹鱼的培育和种质资源保护提供理论依据。以2020年7月-2021年8月采自克孜勒河塔里木裂腹鱼(Schizothorax biddulp... 详细信息

对新疆克孜勒河(Kizil River)流域4种裂腹鱼形态差异和生长特性进行比较分析,从形态特征上为群体的划分提供科学数据,为裂腹鱼的培育和种质资源保护提供理论依据。以2020年7月-2021年8月采自克孜勒河塔里木裂腹鱼(Schizothorax biddulphi)、宽口裂腹鱼(Schizothorax eurystomus)、厚唇裂腹鱼(Schizothorax irregularis)和斑重唇鱼(Diptychus maculates)共126尾个体为研究对象,通过传统形态测量学和基于地标点的几何形态测量学分析方法比较克孜勒河4种裂腹鱼的生长特性与形态差异。结果显示:4种裂腹鱼共有13个形态特征的平均值存在显著差异,且主要集中于头部、躯干部和尾部;利用tpsRegr软件的网格变形分析,4种裂腹鱼的形态差异主要体现在头部和尾部,其中斑重唇鱼鱼体较为纤细,头部偏小;通过主成分分析发现厚唇裂腹鱼、塔里木裂腹鱼和宽口裂腹鱼形态较为相近,而斑重唇鱼明显独立成一组群;聚类分析结果显示塔里木裂腹鱼群体和厚唇裂腹鱼群体首先聚为一支,再与宽口裂腹鱼聚为一支,最后与斑重唇鱼聚类。研究结果显示4种裂腹鱼群体存在形态差异,且与其地理分布密切相关。

关键词：裂腹鱼形态特征地标点法多变量形态测量学克孜勒河

On assessing haze attribution and control measures in China

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

Atmospheric and Oceanic Science Letters 2018年第2期11卷 120-122页

作者： wang hui-jun Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology Nansen-Zhu International Research Center Institute of Atmospheric Physics Chinese Academy of Sciences Climate Change Research Center chinese Academy of Sciences

This paper analyzes the air pollution situation in China,particularly the severe intensifying tendency in central North *** major comments on the air pollution issue in China are proposed,emphasizing the scientific understanding on the mechanisms of air pollution formation processes,the interannual variability,the relative roles of climate change and pollutant emissions,the interaction between climate change and atmospheric chemical processes,and the seasonal prediction of air *** viewpoints have significance for air pollution management in China and around the world.

关键词： Air pollution climate change pollution control prediction

2009-2018年中国9省(自治区)成年人乳品摄入现状及变化趋势

在线全文

学校读者我要写书评

暂无评论

营养学报 2024年第2期46卷 112-119页

作者：王柳森胡霄刘梦冉陈黎黎王惠君王志宏中国疾病预防控制中心营养与健康所北京100050 荣华社区卫生服务中心北京100176

目的了解中国9省(自治区)成年人乳品摄入和消费状况变化特征。方法利用2009、2011、2015、2018年“中国健康与营养调查”(CHNS)数据,选择具有完整膳食调查数据的18岁及以上成年人作为研究对象,共34984人。分析不同性别、年龄、城乡、地... 详细信息

目的了解中国9省(自治区)成年人乳品摄入和消费状况变化特征。方法利用2009、2011、2015、2018年“中国健康与营养调查”(CHNS)数据,选择具有完整膳食调查数据的18岁及以上成年人作为研究对象,共34984人。分析不同性别、年龄、城乡、地域、教育程度、收入水平人群乳品摄入及消费状况。结果2009-2018年中国9省(自治区)成年人乳品消费率提高了6.24个百分点,乳品平均摄入量呈增长趋势。在消费人群中(在调查的3 d中任意1d消费了乳品的成年人被视为乳品消费人群。),乳品平均摄入量呈现下降趋势,2018年成年人乳品平均摄入量比2009年减少了30.11 g/d。女性、65岁及以上老年人、城市、东部、高中及以上和高收入人群的乳品消费率相对其他人群较高。结论中国成年人乳品摄入和消费状况有所改善,但是仍远低于《中国居民膳食指南(2022)》中300~500 g/d的推荐摄入量。

关键词：成年人乳品消费率摄入量变化趋势

Comparison of satellite-estimated and model-forecasted rainfall data during a deadly debris-flow event in Zhouqu, Northwest China

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2016年第2期9卷 139-145页

作者： wang jun wang hui-jun HONG Yang Nansen-Zhu International Research Centre Institute of Atmospheric Sciences Chinese Academy of Sciences Beijing China School of Civil Engineering and Environmental Science University of Oklahoma Norman OK USA Department of Hydraulic Engineering Tsinghua University Beijing China

The data of several rainfall products, including those estimated from satellite measurements and those forecasted via numerical weather modeling, for a severe debris-flow event in Zhouqu, Northwest China, are compared and analyzed in this paper. The satellite products, including CPC MORPHing technique（CMORPH）, TMPA-RT, and PERSIANN are all near-real-time retrieved with high temporal and spatial resolutions. The numerical weather model used in this paper for precipitation forecasting is WRF. The results show that all three satellite products can basically reproduce the rainfall pattern, distribution, timing, scale, and extreme values of the event, compared with gauge data. Their temporal and spatial correlation coefficients with gauge data are as high as about 0.6, which is statistically significant at 0.01 level. The performance of the forecasted results modeled with different spatial resolutions are not as good as the satellite-estimated results, although their correlation coefficients are still statistically significant at 0.05 level. From the total rainfall and extreme value time series for the domain, it is clear that, from the grid-to-grid perspective, the passive microwave-based CMORPH and TRMM products are more accurate than the infrared-based PERSIANN, while PERSIANN performs very well from the general point of view, especially when considering the whole domain or the whole convective precipitation system. The forecasted data — especially the highest resolution model domain data — are able to represent the total or mean precipitation very well in the research domain, while for extreme values the errors are large. This study suggests that satellite-retrieved and model-forecasted rainfall data are a useful complement to gauge data, especially for areas without gauge stations and areas not covered by weather radars.

关键词： Rainfall remote sensing numerical weather model Zhouqu debris-flow event high-resolution data

The Relationship between Total Ozone and Local Climate at Kunming Using Dobson and TOMS Data

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2010年第4期3卷 207-212页

作者： wang jun wang hui-jun Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Climate Change Research Center Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

This paper uses Dobson spectrometer total ozone data,Total Ozone Mapping Spectrometer(TOMS) data and radiosonde reports from Kunming,which is located in southwest China,from 1980 to 2008 to analyze the total ozone-climate *** total ozone decadal long-term trend and abrupt change were studied using enhanced Dobson data whose missing data were amended by the TOMS *** linear regression was used for the selection of the key factors that influence total ozone,including temperatures,geopotential heights,depressions of the dew point,wind velocities,and total solar *** relationship between the selected factors and total ozone was analyzed using the methods of stepwise regression and partial least squares regression(PLSR).Results showed that although the PLSR method was slightly better and more reasonable to study the relationship than stepwise regression,while the two regression results were only slightly *** was also suggested that local climate,especially local circulation and temperature,were important for the variations in total ozone,and the local climate could almost linearly explain 80% of the variance of total *** relationship also indicated that the abrupt change of total ozone in the year 1994 may be related to abrupt local climate change.

关键词： Dobson TOMS Total ozone partial least squares regression

Influence of North Pacific SST on heavy precipitation events in autumn over North China

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2017年第1期10卷 21-28页

作者： LI hui-Xin CHEN Huo-Po wang hui-jun International Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesCollege of Earth ScienceGraduate University of Chinese Academy of SciencesCollaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science ＆ Technologylntemational Joint Laboratory on Climate and Environment ChangeClimate Change Research CenterChinese Academy of Science

The characteristics of heavy precipitation occurrence in autumn（the month of September） over North China are investigated using daily observational *** indicate that heavy precipitation events experienced a significant decadal increase in 2000/*** investigation reveals a close connection between heavy precipitation occurrence and simultaneous North Pacific *** SST anomaly over the North Pacific can result in intensification of the western North Pacific subtropical high and increased water vapor transport from the tropical ocean,which benefits the occurrence of heavy precipitation over North ***,the key region of North Pacific SST influencing heavy precipitation events over North China was different in the periods 1960-2000 and 2001-2014,being located over the eastern Ocean to China in the first period but more eastward in the second *** drift in the key region of SST is partly responsible for the decadal increase in heavy precipitation events over North China since 2000/***,the changes in SST variability（a decrease in the eastern Ocean to China and an increase to its east） may have been the main reason for the eastward movement of the key region in the latter ***,more work is needed in the future to verify the findings of this study.

关键词： Heavy precipitation autumn North China sea surface temperature North Pacific

Analysis of Wind Power Assessment Based on the WRF Model

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2014年第2期7卷 126-131页

作者： LI Ji-Hang GUO Zhen-Hai wang hui-jun LI Ji-Hang wang hui-jun Nansen-Zhu International Research Centre (NZC) Institute of Atmospheric Physics the Chinese Academy of Sciences Beijing 100029 China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China University of the Chinese Academy of Sciences Beijing 100049 China

Assessing wind energy is a key step in selecting a site for a wind farm. The accuracy of the assessment is essential for the future operation of the wind farm. There are two main methods for assessing wind power: one is based on observational data and the other relies on mesoscale numerical weather prediction(NWP). In this study, the wind power of the Liaoning coastal wind farm was evaluated using observations from an anemometer tower and simulations by the Weather Research and Forecasting(WRF) model, to see whether the WRF model can produce a valid assessment of the wind power and whether the downscaling process can provide a better evaluation. The paper presents long-term wind data analysis in terms of annual, seasonal, and diurnal variations at the wind farm, which is located on the east coast of Liaoning Province. The results showed that, in spring and summer, the wind speed, wind direction, wind power density, and other main indicators were consistent between the two methods. However, the values of these parameters from the WRF model were significantly higher than the observations from the anemometer tower. Therefore, the causes of the differences between the two methods were further analyzed. There was much more deviation in the original material, National Centers for Environmental Prediction(NCEP) final(FNL) Operational Global Analysis data, in autumn and winter than in spring and summer. As the region is vulnerable to cold-air outbreaks and windy weather in autumn and winter, and the model usually forecasted stronger high or low systems with a longer duration, the predicted wind speed from the WRF model was too large.

关键词： wind power assessment anemometer tower data WRF model variance analysis