浙江省山区综合开发的探讨     

臧威延 《山地学报》1989,(4)

山区综合开发必须调整偏农型产业结构,实行合理利用自然资源和旨在使山区人口向山下流动的积极的社会经济政策,摆脱与分散性密切相关的自给自足观念。由于山区物质、信息流动阻力大,城镇发展宜取多核分散型,要注意交通等基础设施的超前建设,改善山区环境。  相似文献   

岩性反演技术在煤田三维地震勘探中的应用     

臧立勇  张爱印 《中国煤田地质》2007,19(4):68-69,73

以开滦集团范各庄矿某采区岩性勘探为例,介绍利用地震反演技术解决煤层顶底板岩性问题。该项技术是以测井资料作为约束条件,对地震资料进行反演,推算出波阻抗资料,进而计算煤层厚度,并对顶底板岩性作出推断。通过对部分资料验证,采用岩性反演技术解释的该采区5煤、7煤、9煤、12煤的深度、厚度及其顶底板岩性,与实际情况基本相符。  相似文献   

Effect of brittle fracture on the rheological structure of the lithosphere and its application in the Ordos   总被引：2，自引：0，他引：2  

Shao Xian Zang  Rong Qiang Wei  Jie Yuan Ning 《Tectonophysics》2007,429(3-4):267-285

An empirical formula for the fracture strength of the principal rock type in the lithosphere is obtained based on the experimental data from previous studies, in which the effects of the confining pressure, size of the rock sample, temperature, strain rate and the pore pressure are taken into account, the empirical formulae for the effects of them are also presented. By comparing the frictional strength to the fracture strength calculated using the new empirical formula, it is shown that frictional sliding is dominant in the upper crust but brittle fracture is dominant in the lower part of the crust and the lithosphere beneath the crust. Therefore the fracture mechanism must be taken into account in the study of the rheological structure of the lithosphere. The empirical formula for the fracture strength is applied to study the rheological structure of the lithosphere in the Ordos block. Brittle regime in the rheological structure can be divided into two sub-regions, in one of which brittle fracture and in the other frictional sliding are dominant, respectively, unlike previous conventional studies in which frictional sliding is assumed to be the only factor; the magnitude of the rheological strength of the lithosphere calculated by the empirical formula is also lower than that obtained in previous conventional studies.  相似文献   

雨涝灾害对舞钢市棉花生产的影响     

付世权  曹春田  臧学斌  朱柳松  王俊香  王丽英  王梅香 《河南气象》2007,(Z1)

通过田间调查,对2004-2006年棉花不同阶段雨涝情况对棉花生育及产量构成的影响进行了比较分析,并提出了相应的抗灾减灾对策。  相似文献   

基于天气分型的夏季逐时用电负荷预报     

臧传花  赵敏芬  卢兆民 《气象》2007,33(11):107-111

用2004年和2005年6—8月用电负荷资料和气象资料,分月建立了日平均气象负荷预报方程。讨论了用气象负荷的日变化量来代替总用电负荷的日变化量进而预报逐日总负荷的可行性。分5种天气类型统计了各天气类型下逐时负荷与日平均负荷的比率,日平均用电负荷预报值与该天气类型的逐时比率相乘得到逐时用电负荷的预报值。经2006年试用,日平均用电负荷预报的平均相对误差为2.0%,逐时用电负荷预报的平均相对误差为2.9%,对日平均用电负荷起伏较大的变化过程做出了准确预报。  相似文献   

THE LANDSCAPE ECOLOGICAL ，ASSESSMENT AND PLANNING IN THE CONTOL WATERSHED BY RESERVOIR OF ERLKONG MOUNTAIN     

ZANGShu－ying  YUANHui 《中国地理科学(英文版)》2002,12(2):176-181

Based on the theories of landscape ecology,landscape eco-environment in the coutrol watershed by reser-voir of Erlong Mountain in Heilogjiang Province was analyzed and assessed by using GIS technique and statistical model of Principal Component Analysis and Spatial Cluster Analysis.It is found that 100.08km^2(36%) of the total area is in the state of kilter,85.73km^2(31%) of the total area is in the state of general,and 47.26km^2(17%) and 15.48km^2(16%) is in the relatively poor state and ideal state.According to landscape ecological structure,there are three land-scape function areas being planned and designed.1) Agricultural landscape function area:its developmental direction is tour agriculture and high-benefit agriculture.2)Eco-environment protected function area:the direction of development and utilization of this region is to develop vigorously forest for soil and water conservation ,and try to increase the rate of vegetation cover.3)Forest landscape function area:rational cut and utilization of forest resources,space optimization disposal of category of forest ,foster of forest and protection of wildwood will become the main development directions for this region.This study trys to provide scientific foundation for ecological restoration of the whole valley and its sustain-able development.  相似文献   

Method of Separating Cosmic-Ray Positrons from Electrons in the DAMPE Experiment     

Hao-Ting Dai  Jing-Jing Zang  Ying Wang  Chuan-Ning Luo  Yun-Long Zhang  Zhi-Yong Zhang  Yi-Feng Wei  Li-Bo Wu  Cheng-Ming Liu  Cong Zhao  Xiao-Lian Wang  Zi-Zong Xu  Guang-Shun Huang 《天文和天体物理学研究(英文版)》2022,(3):115-121

A method of identifying positron/electron species from the cosmic rays was studied in the DArk Matter Particle Explorer(DAMPE)experiment.As there is no onboard ...  相似文献   

深度学习在海珠国家湿地公园统一确权调查中的应用     

程晓晖  李长辉  欧佳斌  刘业光 《测绘通报》2021,(11):110-114

针对自然资源调查中单一数据源难以兼顾地物空间与光谱属性的问题,本文提出了基于深度学习的数据融合分类方法。该方法利用多源数据有限样本,实现了植被覆盖区精细化分类;并以广东海珠国家湿地公园为试点,完成了示范区内自然资源类型提取,以及植被数量与质量调查。试验结果表明,该方法可有效实现自然资源类型提取与植被分类,林木数量探测正确率优于87%,显著提升了植被分类精细度,探索了基于精细化调查的自然确权登记途径。  相似文献   

新疆卡特巴阿苏金铜矿区二长花岗岩锆石SHRIMPU-Pb年龄及地质意义   总被引：1，自引：0，他引：1  

邢令  杨维忠  藏梅  林泽华  陈威 《新疆地质》2015,(1):1-6

新疆卡特巴阿苏金铜矿床是在那拉提中天山构造带内发现的首个特大型金铜矿床,矿床赋存于二长花岗岩体的脆性断裂破碎带内。通过对二长花岗岩的锆石进行SHRIMP U-Pb测年,获得25粒锆石加权平均值为(359.3±5.3)Ma,表明该岩体侵位时间为晚泥盆世末期,同时限定了卡特巴阿苏金矿金铜矿床的形成年龄上限为(359.3±5.3)Ma。  相似文献   

土耳其Nallihan黄土-古土壤岩石磁学特征及其环境意义     

侯顺民  刘秀铭  吕镔  陈家胜  王涛  周子博  温昌辉 《第四纪研究》2015,35(4)

黄土广泛分布在东欧和西亚地区,但位于欧亚大陆连接地带的土耳其未见风积黄土的报道,本文对位于土耳其首都安卡拉西北的Nallihan新发现的黄土-古土壤剖面进行系统的环境磁学研究,结合粒度参数和稀土元素指标,讨论土耳其黄土的成因和磁化率变化机制.研究结果显示:土耳其Nallihan S0～L3黄土剖面与典型风积的西伯利亚和中国西峰黄土的粒度特征图形态相似4暗示它们的成因相似性;稀土分配模式与黄土高原黄土基本一致,为上地壳平均值,指示了风积黄土在搬运过程中经过充分混合,整个剖面上下稀土模式分配高度吻合,说明研究区黄土堆积期间物源区相对稳定.热磁和磁滞分析表明样品的主要载磁矿物是亚铁磁性矿物磁铁矿/磁赤铁矿.该剖面磁化率在古土壤获得高值,在黄土层获得低值,磁化率与成土作用和指示细颗粒磁性矿物贡献的xfd％、xARM正相关,说明成土作用生成的细颗粒亚铁磁性矿物是磁化率增强的主导因素,土耳其黄土剖面磁化率总体上低于中国黄土高原地区黄土.该黄土剖面中有一层古土壤层S2,其顶部覆盖一层砾石层,说明在该间冰期发生过洪水作用,将高坡风化的砾石层冲到土层中堆积下来,在该砾石层之下的古土壤层,磁化率降低,可能与该时期土壤层湿度大,形成湿润氧化环境,导致部分强磁性的超顺畅/稳定单畴(SP/SSD)颗粒磁性矿物转化为弱磁性矿物,使得磁化率降低.  相似文献