陕北府谷矿区煤炭资源清洁利用潜势及方式探讨     

杜芳鹏  李聪聪  乔军伟  魏云迅  张光超  雒铮  谭富荣 《煤田地质与勘探》2018,46(3):11-14

为了厘清陕北府谷矿区煤炭资源的清洁潜势、探究其更加清洁高效利用的可能性,在整理分析相关煤炭勘查资料的基础上,通过对矿区主采煤层样品进行系统煤质分析、煤岩组分鉴定、微量元素测试以及相应的对比分析,以探讨其清洁高效利用潜势及途径。结果表明:府谷矿区煤具有中高灰、低硫、高挥发分、高氢碳原子比、低有害元素、富惰质组分等特点,较高的灰分是府谷矿区煤清洁利用的最主要障碍。经对比评价,府谷矿区原煤洁净等级为Ⅲ级,浮煤为Ⅱ级。低热演化程度、高挥发分、高氢碳原子比的特点使其在煤炭直接液化利用方面具有较大的优势,浮煤直接液化利用是府谷矿区煤炭资源清洁高效利用的选择之一。   相似文献   

弘扬传统建筑文化 奏响新时代强音     

本刊编辑部 《中国勘察设计》2018,(2)

正近日,由住房和城乡建设部组织研究、中国建筑工业出版社出版的《中国传统建筑解析与传承》第二批正式出版。至此,该套丛书的31个卷次已经推出了19卷,标志着《传统建筑解析与传承》调查研究工作已结出硕果,为传承发展传统建筑文化奏响了新时代的强音。"改变今天建筑缺失传统文化的局面,我们需要重新认识我国传统建筑文化,把握其精髓和发展脉络,挖掘和丰富其完整价值,探索传统与现代融合的理念和方法",住房和城乡建设部总经济师赵晖在《中国传统建筑解析与传承》丛书的总序中这样写道。为此,2012年住建  相似文献   

创新,为行业转型发展插上双飞翼     

本刊编辑部 《中国勘察设计》2018,(9)

正这是一个加速变革的时代资本飓风"野蛮"闯入,打破行业边界;"互联网+"、云计算、智能化等信息技术日新月异,重构行业生态;海内外市场环境风云诡谲,时刻挑战企业抗风险能力;国家政策频出,对行业未来发展方向产生深刻影响……这些"变革"如迅雷贯耳、秋风扫叶,颠覆着固有秋序,传统行业顿感寒意彻骨。在此背景下,工程勘察设计行业如何实现转型发展?答案是"创  相似文献   

勇挑重担,书写乡村振兴大文章     

本刊编辑部 《中国勘察设计》2018,(7)

正"把实施乡村振兴战略摆在优先位置""让乡村振兴成为全党全社会的共同行动""要坚持乡村全面振兴,抓重点、补短板、强弱项,实现乡村产业振兴、人才振兴、文化振兴、生态振兴、组织振兴"……近日,习近平总书记对实施乡村振兴战略作出重要指示,为乡村振兴战略推进再添动力。至此,乡村振兴战略"大文章"华丽开篇,工程勘察设计行业迎来新的机遇与  相似文献   

华南区域高分辨率数值模式前汛期预报初步评估     

林晓霞  冯业荣  陈子通  简云韬 《热带气象学报》2021,37(4):656-668

基于华南地区自动站逐小时观测资料, 采用传统站点评分、邻域法等评估华南区域高分辨率数值模式(包括GRAPES_GZ_R 1 km模式和GRAPES_GZ 3 km模式)对降水、地面温度和风场等要素的预报能力。结果表明: GRAPES_GZ_R 1 km模式的降水预报技巧优于GRAPES_GZ 3 km模式, 模式预报以正偏差为主。对于不同起报时间的预报, 00时(世界时, 下同)起报的预报效果优于12时。GRAPES_GZ_R 1 km模式的TS评分是GRAPES_GZ 3 km模式的两倍以上, 对不同降水阈值的评分均较高。分数技巧评分(FSS)显示GRAPES_GZ_R 1 km模式6 h累计降水预报在0.1 mm、1 mm及5 mm以上的降水均可达到最低预报技巧尺度, 对所检验降水对象的空间位置把握能力更好。2 m气温和10 m风速检验结果表明两个模式均能较好把握广东省温度的分布特征, GRAPES_GZ_R 1 km模式对2 m气温预报结果优于GRAPES_GZ 3 km模式, 预报绝对误差更小; 两个模式对风速的预报整体偏强, 预报偏差在1~4 m/s之间, 但相比之下GRAPES_GZ 3 km模式在风场预报上表现更好。GRAPES_GZ_R 1 km模式的2 m气温和10 m风速预报偏差随降水过程存在明显波动, 强降水过后温度预报整体偏低, 风速预报偏强, 在模式产品订正、使用等需要考虑模式对主要天气系统的预报情况。总的来说, GRAPES_GZ_R 1 km模式的预报产品具有较好的参考价值。   相似文献   

Verification and Assessment of Real-time Forecasts of Two Extreme Heavy Rain Events in Zhengzhou by Operational NWP Models     

钟水新  庄妍  胡胜  陈子通  丁伟钰  冯业荣  邓涛  刘显通  张艳霞  徐道生  戴光丰  蒙伟光 《热带气象学报(英文版)》2021,27(4):406-417

In the present study, the performances of the NWP models on two heavy rainfalls on 20 July and 22 August 2021 over Henan Province were investigated. The impacts of the water vapor transport to the extreme rainfall were further discussed. The results showed that the regional model system in the Guangzhou Meteorological Service generally showed high scores on the extreme rainfall over Henan. The maximum 24h accumulative rainfall by the 24h forecasts by the CMA-GD reached 556 mm over Henan Province. The 24-h and 48-h Threat Score (TS) of heavy rainfall reached 0.56 and 0.64. The comparisons of the Fraction Skill Score (FSS) verifications of the heavy rainfall by CMA-GD and CMA-TRAMS at the radium of 40km reached 0.96 and 0.87. The water vapor transport to the extreme rainfall showed that the vertically integrated water vapor transport (IVT) of the whole layer before the occurrence of the heavy rainfall exhibited a double-eyes distribution in case 7 · 20. The north eye over Henan reached the same magnitude of IVT as the typhoon eye (Cempaka) over south China. The IVT over the lower troposphere (<500 hPa) showed an overwhelming magnitude than the upper level, especially in the planetary boundary layer (<700 hPa). More practical technical needs to be developed to improve its performances on the forecasting of extreme rainfall, as well as more experiments need to be conducted to examine the effects of the specific terrain and physical schemes on the extreme rainfall.  相似文献   

Assimilation of Polarimetric Radar Data Using an Ensemble Kalman Filter for the Analysis and Forecast of Tropical Storm Ewiniar     

黎慧琦  刘显通  肖辉  万齐林 《热带气象学报(英文版)》2021,27(2):94-108

This study explores the potential for directly assimilating polarimetric radar data (including reflectivity Z and differential reflectivity ZDR) using an ensemble Kalman filter (EnKF) based on the Weather Research and Forecasting (WRF) model to improve analysis and forecast of Tropical Storm Ewiniar (2018). Ewiniar weakened but brought about heavy rainfall over Guangdong, China after its final landfall. Two experiments are performed, one assimilating only Z and the other assimilating both Z and ZDR. Assimilation of ZDR together with Z effectively modifies hydrometeor fields, and improves the intensity, shape and position of rainbands. Forecast of 24-hour extraordinary rainfall ≥250 mm is significantly improved. Improvement can also be seen in the wind fields because of cross-variable covariance. The current study shows the possibility of applying polarimetric radar data to improve forecasting of tropical cyclones, which deserves more researches in the future.  相似文献   

本刊声明     

本刊编辑部 《地理空间信息》2018,(8)

正为适应我国信息化建设,扩大本刊及作者知识信息交流渠道,本刊数据已被《中国核心期刊(遴选)数据库》《CNKI中国期刊全文数据库》和《中文科技期刊数据库(全文版)》等收录。在《地理空间信息》发表的论文均默认将其在著作权保护期内的复制权、发行权、汇编权、翻译权以及网络传播权授权给《地理空间信息》编辑部,编辑部可将上述权利转授给第三方使用。作者不再许可他人以任何形式使用该篇论文,但可以在其后续作品中引用(或翻译)该论文中部分内容或将其汇  相似文献   

花岗岩风化料弃土快速堆填过程中不排水抗剪强度评估     

詹良通  孙倩倩  郭晓刚  陈锐  陈云敏 《岩土力学》2021,(1):50-58

沿海沿江城市地下开挖产生的工程渣土含泥量大、含水率高且较松散,主要运往渣土场进行堆填处置。由于产量巨大而处置场地有限,许多渣土场在运营过程中存在堆填速度快、缺乏排水设施、超高超库容堆填等问题,容易引发堆填体失稳事故。目前对于非饱和工程渣土堆体在快速堆填过程中的失稳机制认识尚不清晰,尤其是对这一过程中的高饱和度工程渣土强度增长规律缺乏足够的认识。以深圳红坳渣土场填料——花岗岩风化料(CDG)填土为研究对象,对不同初始饱和度土样进行三轴不排水不排气等向压缩和剪切试验,结果表明:非饱和CDG填土不排水抗剪强度随围压增大呈非线性增长,增长速率与试样初始饱和度密切相关;当土样压缩后的饱和度超过0.7,不排水强度随围压的增长速率显著降低。基于有效固结应力法的原理,结合Hilf孔压公式和修正剑桥模型,提出了一种工程渣土不排水抗剪强度估算方法,并通过与试验结果对比验证了该方法对初始饱和度高于0.6的CDG填土的适用性。利用该方法确定的不排水强度cu与正应力σn的关系可应用于高饱和度工程渣土快速堆填中的稳定性分析。  相似文献   

CAUSAL ANALYSIS AND NUMERICAL MODELING OF THE INSHORE INTENSIFICATION OF SUPER TYPHOON “HATO”     

于鑫  郑腾飞  万齐林  肖辉  刘显通  王婷 《热带气象学报(英文版)》2019,25(3):293-303

This paper comprehensively analyzes the characteristics and cause of the inshore intensification of super typhoon "Hato", the 13 th super typhoon in 2017. The aspects of typhoon structure, evolution of large-scale circulation and physical quantity field are analyzed using observation data from the Guangdong Automatic Station, Shenzhen Doppler Radar data, NCEP 1°×1° reanalysis data, NCEP 0.25°×0.25° sea surface temperature(SST) data, etc.Additionally, in order to investigate the influence of SST change on the intensity of "Hato", the WRF model and ECMWF 0.125°×0.125° reanalysis data are combined to conduct 3 sensitivity tests on"Hato". The results show that the favorable conditions for inshore intensification of "Hato"included the strengthening and westward extension of the subtropical high, continuous increase of low level moisture transport, an anomalous warm SST area north of 20°N in the South China Sea, an extreme divergence value in the northern South China Sea exceeding 6 ×10-5 s-1, and vertical environmental wind shear between 1.1 m/s-4.8 m/s. The intensity of"Hato"was very sensitive to changes in SST. When the SST rose or dropped by 2℃, the minimum central pressure of the typhoon changed by about 13 hPa or 11 hPa,respectively. SST indirectly influenced the intensity of the typhoon through affecting latent heat transport and sensible heat transport.  相似文献