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11.
基于国际体面劳动的目标,从就业、权利、社会保障、社会对话4个维度构建了体面劳动水平评价指标体系,利用改进的熵值法确定指标权重,测度2012年中国大陆省际尺度上体面劳动水平。借助SPSS系统聚类法将中国大陆31个省级行政区体面劳动水平划分为高水平、较高水平、中等水平、较低水平和低水平5个类型区域。研究结果表明,中国大陆体面劳动水平呈现出东北和东部地区水平高、西部地区水平低、中部地区水平居中的空间分异格局。利用一元线性回归分析,初步断定经济发展与体面劳动水平的空间分异存在较强的正相关关系。 相似文献
12.
The estimation of oil spill coverage is an important part of monitoring of oil spills at sea.The spatial resolution of images collected by airborne hyper-spectral remote sensing limits both the detection of oil spills and the accuracy of estimates of their size.We consider at-sea oil spills with zonal distribution in this paper and improve the traditional independent component analysis algorithm.For each independent component we added two constraint conditions:non-negativity and constant sum.We use priority weighting by higher-order statistics,and then the spectral angle match method to overcome the order nondeterminacy.By these steps,endmembers can be extracted and abundance quantified simultaneously.To examine the coverage of a real oil spill and correct our estimate,a simulation experiment and a real experiment were designed using the algorithm described above.The result indicated that,for the simulation data,the abundance estimation error is 2.52% and minimum root mean square error of the reconstructed image is 0.030 6.We estimated the oil spill rate and area based on eight hyper-spectral remote sensing images collected by an airborne survey of Shandong Changdao in 2011.The total oil spill area was 0.224 km~2,and the oil spill rate was 22.89%.The method we demonstrate in this paper can be used for the automatic monitoring of oil spill coverage rates.It also allows the accurate estimation of the oil spill area. 相似文献
13.
内蒙赤峰沙地治理的成效与存在问题 总被引：1，自引：0，他引：1
本文主要介绍了赤峰沙地自然概况、沙地治理的经验与成效。通过观察,这一地区土地沙漠化正在发展,植物生产量下降,局部小气候变坏。根据当地沙漠化的情况,提出了防治措施;赤峰沙地属半干旱区,是沙漠化防治的枢纽地带,要重视它对农牧经济建设、稳定生态环境的重要作用。 相似文献
14.
The interact of construction and circumstance becomes more and more obviously, and research on it is essentially urgent. The way to solve it, first it relies on quantifiable evaluation to the effects done by different construction techniques, then, choose related techniques which cause less damage according to the endurance of circumstance. 相似文献
15.
Acta Geotechnica - A hypoplastic constitutive model is proposed to model the cementation-induced enhanced stiffness, strength and dilative behavior of cemented sand and gravel materials. The model... 相似文献
16.
福建武平岩基岩石谱系单位划分 总被引：1，自引：0，他引：1
根据近几年来在１：５万区调中采用岩石谱系单位新理论、新方法填图的成果,以及岩石成分、结构构造特征、群居关系、侵入接触类型等,将过去１：２０万区调均划属燕山早期黑云母花岗岩及细粒花岗岩的武平岩体,解体为志留纪、晚三叠世、侏罗纪、白垩纪等不同时代深成岩体,划分出中（基）性、中酸性及酸性岩等岩石类型。圈定深成岩体４０个,独立侵入体１５个,共３３个单元,归并为６个超单元,５个独立单元。并认为志留纪侵入岩浆 相似文献
17.
A Post-Processing Method for the Removal of Refraction Artifacts in Multibeam Bathymetry Data 总被引：2，自引：0，他引：2
Fanlin Yang Jiabiao Li Ziyin Wu Xianglong Jin Fengyou Chu Zhongzhi Kang 《Marine Geodesy》2007,30(3):235-247
Sound refraction artifacts are often present in multibeam swath bathymetry data. For a flat array, the artifacts are usually more serious in outer beams than in inner beams. In a 3D topographical mapping they appear as ridges that parallel the tracks of the vessel. To shorten the survey time, the outer beams should be utilized as often as possible. Therefore, the refraction errors should be removed. In this paper, we present a model of reduced sound speed profile that consists of three water layers. The sound speed of the two upper layers has a constant gradient, and the third layer has the same sound speed as the most bottom measured layer. The model parameters can be searched based on the principle of the minimum difference of depth between the overlap of two neighboring swaths. The horizontal position and depth of each beam can be accordingly recalculated using the model parameters. To avoid being trapped in local optimum, the initial search scope is limited according to assumed lunch angle and travel time in each subregion. The method is verified by comparing the simulated and real data. 相似文献