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51.
地下贯通工程测量方案的优化理论和方法 总被引:2,自引:0,他引:2
地下贯通工程的控制测量导线多为加测陀累方位角的导线,本文讨论了贯通工程导线加测陀螺边的个数,位置,以及提高其可靠性,经济性的有关问题。 相似文献
52.
给出了“广义信息维”的计算公式和计算方法,研究了首都圈和周期地区的广义时间分维和华北地区的广义空间分维。结果表明,在该地区Ms≥5.3地震前0.5-3a,时间分维都有一个较明显的降维过程;空间分维也有较好的对应效果,但是存在漏现象。 相似文献
53.
澧县曾家河芒硝岩盐矿床开发浅析 总被引:2,自引:0,他引:2
本文在分析矿床内外部建设条件的基础上,根据芒硝岩盐原料市场行情,着重对矿床开发的经济社会效益进行了评价,初步评价表明:国家和企业均可获得较丰厚的利润,还可安置1400多人就业。建议进一步开展地质勘查工作。 相似文献
54.
辽中南地区经济发展与资源环境关系 总被引:8,自引:4,他引:4
分析了辽中南地区资源环境对经济发展的作用和经济发展对资源环境的影响,阐明了区域经济发展与资源环境密不可分的关系,资源环境是经济发展的物质基础,经济发展为促进资源合理开发利用和环境保护创造条件。 相似文献
55.
杨孟著 《广东海洋大学学报》2002,22(5):26-30
发展我国知识经济 ,必须以邓小平“科学技术是第一生产力”思想为理论基石 ,符合社会主义市场经济特征的激励知识创新活动的“经济组织”为基本前提。在此基础上 ,构建起符合我国国情的由相互联系、制约和影响的九大要素为基本框架的知识创新机制 ,是当前社会经济环境条件下的最优制度安排。 相似文献
56.
57.
In Capital Circle area, there are three groups of repeated gravity measurements observed by different institutes using different instruments or methods. The simultaneous adjustment of absolute and relative measurements and the elimination of systematic error among the relative measurements have been carded out in this paper. Thus an unified temporal gravity change system with absolute reference has been established. On the basis of this, the crustal subsidence effect on gravity, which belongs to non-tectonic factor, is analyzed and the station displacement corrections are carried out, so that the long-wave disturbance is eliminated. So far our following aims are realized: the advantages of the absolute and relative measurement methods are complementary to each other; the contradiction and environment disturbance are eliminated; the amounts of information are enlarged; the sampling interval of time domain is compressed. In a word, the ability of identifying the tectonic activity process is enhanced. The results show that: there are systematic errors between the two groups of relative measurements and within the data of 10 campaigns ; the uneven local crustal subsidence in the southeast of the study area results in a linear rise of gravity value at 10 stations; they can be corrected by the regression analysis. The maps of revised temporal gravity change can obviously and integrally reflect the Ms=5.0 earthquake in Guye on October 6, 1995. 相似文献
58.
通过对经济建设与公益事业发展、应急救灾与全民防御、依法行政与主观决策、眼前利益与长治久安等关系的论述,认为,城市经济建设与防震减灾密切相关。论述了防震减灾与兴政安民之间的联系。结合太原市地震局近一年的改革实践,得出只要防震减灾与经济建设工作并肩发展,就能起到了“兴政安民”的作用。 相似文献
59.
Boris Kostic M. Peter Süss Thomas Aigner 《International Journal of Earth Sciences》2007,96(4):743-767
Quaternary sands and gravels form important, yet often highly heterogeneous economic deposits. Detailed 3-D analysis of the
sedimentary structure and stratigraphy of these deposits allows for an accurate estimation of exploitable material. This paper
presents a case study in SW Germany reconstructing the 3-D distribution of glacial sediments based on a high-resolution, process-orientated
sedimentary facies classification and lithostratigraphy integrated within the geo-modelling package gOcad. Situated along
the maximal ice-extent of the Rhine glacier during the last glaciation, the study area is characterised by a morphologically
prominent terminal moraine and its associated sandur, which form the stratigraphically youngest sediments of a glacial basin,
partially exposed in two gravel pits. These outcrops helped to reconstruct the complex sedimentary architecture of the northern
part of the glacial basin. The regional analysis is based on core data, as well as geoelectric and geomagnetic surveys. All
data were integrated into km-scale, high-resolution geological 3-D models, depicting the large-scale dynamics of multiple
glacier advances and retreats during the Early to Late Pleistocene. These models allow quantifying the thickness and volume
distribution of exploitable sandy gravel and help to evaluate the occurrence of non-exploitable interbedded diamicton horizons.
The high quality and quantity of gravels particularly north of the terminal moraine classifies the investigated area as very
prospective for raw materials exploitation in the future. 相似文献
60.
A multi-equation spatial econometric model,with application to EU manufacturing productivity growth 总被引:1,自引:0,他引:1
Bernard Fingleton 《Journal of Geographical Systems》2007,9(2):119-144
A multi-equation spatial econometric model is used to explain variations across EU regions in manufacturing productivity growth
based on recent theoretical developments in urban economics and economic geography. The paper shows that temporal and spatial
parameter homogeneity is an unrealistic assumption, contrary to what is typically assumed in the literature. Constraints are
imposed on parameters across time periods and between core and peripheral regions of the EU, with the significant loss of
fit providing overwhelming evidence of parameter heterogeneity, although the final model does highlight increasing returns
to scale, which is a central feature of contemporary theory.
相似文献