构建新疆兵团水文业务管理体系的思路和建议          下载免费PDF全文

杜得彦  李向阳  王志勇 《水文》2013,33(5):85-87

本文分析了新疆生产建设兵团管辖区域内水文工作现状、存在的问题,提出构建水文业务管理体系的紧迫性和重要性,提出了依托国家援疆机制、水文重大项目、兵团水利改革发展等机遇逐步建立兵团水文站网监测体系、职工队伍体系、业务管理及服务体系的构想,并就加快推进兵团水文建设以实现全国水文行业统一管理提出思路。  相似文献   

全球变化背景下北方泥炭地释放溶解有机碳的驱动机制          下载免费PDF全文

向武  Jiasong Fang  万翔  贺灵  孙兴庭  闭向阳 《地学前缘》2011,18(6):72-78

泥炭地（peatland）是一类储碳效率很高的特殊陆地生态系统,其碳储量约占全球土壤碳库的近1／3,对全球碳循环有着举足轻重的作用。有证据表明在过去20余年,北半球大范围的天然水体中溶解有机碳的浓度呈显著增升趋势。普遍认为与全球变化背景下北方泥炭地大规模释放溶解有机碳有关,但其驱动机制尚不十分清楚。已经提出的具有代表性...  相似文献   

储层砂岩声波速度预测   总被引：3，自引：0，他引：3  

伍向阳  方华 《地球物理学进展》1999,14(1):56-63

本文主要基于Ｇａｓｓｍａｎｎ方程和经验规律，提出了孔隙流体替代和孔隙度改变时对砂央地震波速度变化的估计，以及直接利用岩石矿物和孔隙流体的弹性性质计算砂岩地震波速度方法，利用已知的岩芯，测井或地震数据，运用这此方法，可合理地对储层砂岩地震波速度进行预测。  相似文献   

岩石的应力松弛,应变硬化和应变软化   总被引：1，自引：0，他引：1  

伍向阳 《地球物理学进展》1996,11(4):71-76

本文论述了岩石应力松弛的某些基本特征，分析了应力松弛测试的基本理论，特别就岩石应力松弛中的应变硬化和软化现象提出了作者的见解，并导出了其数据处理方法。  相似文献   

Lead isotopic exploration intersecting mineralization zones for the depth forecast of concealed deposits     

Xiangyang Chang  Bingquan Zhu  Ri Zou 《中国科学D辑(英文版)》2000,43(3):293-301

Pb isotopic geochemical exploration intersecting mineralization zones have been well developed in the light of the eigenvaluesV ₁ andV ₂ of three-dimensional topological projection of Pb isotopic data. The newly developed theoretical model forecasting concealed deposits has been verified in the evaluation of Longbohe copper deposit in Jinping, Yunnan Province, which is consistent with the observed law of depth variation for Pb isotopes. The forecasting results show that the depth of buried major orebody should occur at about -50 to -400 m and deeper within the eastern and western mineralization belts of Longbohe copper deposit.  相似文献   

融合GPS与强震仪数据实时监测瞬时地壳形变     

陈向阳  于金池  葛建  侯勇涛 《测绘通报》2019,(12):87-90,115

针对强震仪与GPS各自的优点与缺陷，以2016年意大利Mw 6.0级地震为例，探讨了利用Kalman滤波融合GPS与强震仪数据实时监测中等强度地震引起的瞬时地壳形变的可行性与优势。Kalman滤波获取的位移波形以GPS数据作为整体趋势，细节部分用强震仪数据进行描述，融合后的位移波形精度较高，能够准确和细致地描述地震引起的地表动态形变；与此同时，Kalman滤波位移波形也能够准确地探测中等强度地震引起的同震永久阶跃；Kalman滤波位移波形的功率谱在低频部分与GPS位移波形的功率谱密度相似，在高频部分与强震仪位移波形的功率谱密度相似，表明Kalman滤波结合了GPS与强震仪各自的优点；交叉小波分析表明，Kalman滤波获取的位移波形与GPS、强震仪数据呈现较强的正相关性，小波相似值均在0.8以上。以上结果表明，融合GPS与强震仪数据可以结合二者各自的优点，弥补各自的缺陷；融合GPS与强震仪数据可以有效探测中等强度地震引起的瞬时地壳形变。  相似文献   

监控视频中动态目标与地理空间信息的融合与可视化方法     

张旭  郝向阳  李建胜  李朋月 《测绘学报》2019,48(11):1415-1423

监控视频的动态前景目标智能分析是平安城市、智慧园区等安防建设的重要基础,将监控视频与地理空间数据融合可为静态的地理数据赋予动态属性。针对传统监控视频与地理信息数据集成仅仅将视频数据投射至地理空间,造成存储难、视频内容理解难度大等问题,本文提出了前景动态目标与地理空间信息的融合模型,通过推导出的映射模型将图像空间中的动态前景目标及跟踪轨迹映射至地理空间中,达到将监控视频与地理信息有机融合的目的。根据不同的应用需求,本文设计了4种多图层融合显示模式,实现了监控视频中的动态前景目标在地理空间的可视化。  相似文献   

Effects of dietary cottonseed meal protein hydrolysate on growth,antioxidants and immunity of Chinese mitten crab Eriocheir Sinensis     

Cheng  Huihui  Liu  Wenbin  Yuan  Xiangyang  Jia  Erteng  Zhang  Dingdong  Jiang  Guangzhen 《中国海洋湖沼学报》2020,38(3):869-882

Journal of Oceanology and Limnology - One hundred and sixty crabs (average initial weight: 51.32±0.08 g) were fed with four experimental diets containing cottonseed meal protein hydrolysate...  相似文献   

Temporal and spatial evolution of the coastal profiles along the Yellow River Delta over last three decades     

Xiaoying Chen  Shenliang Chen  Ping Dong  Xiangyang Li 《GeoJournal》2008,71(2-3):185-199

The subaerial delta of the Yellow River has undergone a notable reshaping process with drastic changes in erosion and accretion patterns both temporally and spatially. These morphological changes not only have significant impact on the long-term evolution of delta but also pose severe threat to the existing infrastructures adjacent to the eroding delta lobe. This paper presents a data-based study of waves, currents, sediments and subaqueous bedforms including the application of Principal Component Analysis (PCA) to the measured coastal profiles in order to understand qualitative and quantitative processes that are responsible for the observed changes. The results demonstrated that the Yellow River Delta has recently been dominated by recession process due to the reduced sediment supply from the Yellow River in the recent decades. A critical threshold of river sediment discharge was formulated and used to explain the observed morphodynamic processes. It was found that the coast of the Yellow River Delta could be broadly divided into three geomorphic zones: the area near abandoned delta, the estuarine area, and Laizhou Bay. At the nearshore zone of the abandoned delta, waves are the main agent for bed erosion and sediments suspension. The tidal current is effective in transporting suspended sediments and exerts the main control on the depths of the erosion–accretion balance zone on the coastal profiles. The area near the present estuary has seen rapid deposition with the progradation rate being governed by the relative intensity of fluvial and marine processes while the coasts in Laizhou Bay are stable and the particular characteristics of the tidal current field prevent the sediments supplied by the Yellow River from reaching this area.  相似文献   

数字中山地理空间框架建设及推广应用经验     

康向阳 《北京测绘》2017,(3)

数字中山地理空间框架是中山市数字城市建设的重要基础,其推广应用是检验其建设成果优劣和实现经济社会效益的重要途径。本文对数字中山地理空间框架建设的现状进行了分析,讨论了框架推广应用中存在的问题,并总结了一些经验,结合中山实际情况提出了相应的建议,对国内其他城市地理空间框架成果的推广应用具有一定借鉴作用。  相似文献