Spatial-temporal heterogeneity of industrial structure transformation and carbon emission effect in Xuzhou Metropolitan Area     

Fangdao Qiu  He Yuan  Liangyu Bai  Fei Li 《中国地理科学(英文版)》2017,27(6):904-917

Employing decoupling index and industrial structure characteristic bias index methods, this study analyzed the spatial-temporal characteristics of industrial structure transformations and their resulting carbon emissions in the Xuzhou Metropolitan Area from 2000 to 2014, with a focus on their relationships and driving factors. Our research indicates that carbon emission intensity from industrial structures in the Xuzhou Metropolitan Area at first showed an increasing trend, which then decreased. Furthermore, the relationship between emissions and industrial economic growth has been trending toward absolute decoupling. From the perspective of the center-periphery, the Xuzhou Metropolitan Area formed a concentric pattern, where both progress towards low emissions and the level of technological advancement gradually diminished from the center to the periphery. In terms of variation across provinces, the ISCB index in the eastern Henan has decreased the slowest, followed by the southern Shandong and the northern Anhui, with the northern Jiangsu ranking last. During this period, resource- and labor- intensive industries were the primary growth industries in the northern Anhui and the eastern Henan, while labor-intensive industries dominated the southern Shandong and capital-intensive industries dominated the northern Jiangsu. In terms of city types, the spatial pattern for industrial structure indicates that recession resource-based cities had higher carbon emission intensities than mature resource-based cities, followed by non-resource-based cities and regenerative resource-based cities. Generally, the industrial structure in the Xuzhou Metropolitan Area has transformed from being resource-intensive to capital-intensive, and has been trending toward technology-intensive as resource availability has been exploited to exhaustion and then been regenerated. Industrial structure has been the leading factor causing heterogeneity of carbon emission intensities between metropolitan cities. Therefore, the key to optimizing the industrial structure and layout of metropolitan areas is to promote industrial structure transformation and improve the system controlling collaborative industrial development between cities.  相似文献   

Chlorophyll fluorescence extraction from water-leaving radiance of algae-containing water through polarization     

Lin Wang  Zhongfeng Qiu  Huifang Pang  Yongjian Liu  Yanlong Chen  Lingling Jiang 《中国海洋大学学报(英文版)》2017,16(6):1003-1008

When measuring reflectance spectra, it is very important to accurately extract chlorophyll fluorescence from elastic- scattering light in water-leaving radiance. The elastic scattering of light by water particles produces partially polarized light. In contrast, chlorophyll fluorescence in planktonic algae yields completely unpolarized light. These properties can be used to separate fluorescent signals from the water-leaving radiance and thus to determine chlorophyll concentration. The algal species Aureococcus anophagefferens was used to conduct a laboratory polarization experiment. For the tests, we used a field spectroradiometer and a polarizer; measurements were collected using two different observation modes. The chlorophyll fluorescence curve extracted through polarization shows an excellent match with the results obtained using the fluorospectro photometer for both measurement modes, suggesting that polarization-based chlorophyll fluorescence extraction may be feasible. The extracted fluorescence is more reliable at incident zenith angles ranging from 30° to 60°. For algae-containing water, the results improve with increasing chlorophyll concentration. This method could help improve chlorophyll concentration measurement and the remote-sensing detection of resulting harmful algae blooms.  相似文献   

国家数字地震台网产出资料的分析与说明   总被引：1，自引：0，他引：1  

刘瑞丰  王科英  黄瑾  李保昆  邱海江  任枭  侯建民  邹立晔 《地震地磁观测与研究》2004,25(4):1-7

介绍了2001年以来地震台站的资料分析情况和国家数字地震台网分中心的资料产出情况,通过分析表明,由于宽频带数字地震资料具有频带宽、动态范围大等特点,2003年利用数字地震台网资料分析地震的数量比传统的模拟记录提高30％～40％。  相似文献   

利用黏弹性有限元模型研究挪威北海北部地区末次冰期以来的冰后回弹和应力演化          下载免费PDF全文

孟秋  胡才博  石耀霖 《地球物理学报》1954,63(10):3751-3763

挪威北海北部在末次冰期存在较大范围的冰盖,其冰盖的加载和卸载会对地表变形和内部应力调整产生重要影响.本文基于Maxwell黏弹性本构关系,根据初应力法自主开发了一套Maxwell黏弹性体有限元程序,它可以考虑重力和构造加载、地球介质弹性的纵向和横向不均匀性以及黏性的分层性,可以计算冰川载荷变化引起的地球表面变形及内部应力状态的变化.利用它研究了挪威北海北部1.1 Ma以来的冰川载荷变化、特别是两万多年以来冰盖的消退引起的地表冰后回弹.结果表明,自2万年以来,冰后回弹效应在冰盖载荷变化的不同阶段呈现明显的时空变化,现今地表垂直变化速率为几个毫米/年,与观测结果一致.下地壳和上地幔的黏弹性松弛效应明显,上地壳的应力状态在现今海岸线两侧存在差异性,水平和垂直正应力变化可达几十兆帕,剪应力变化有一个先增加后迅速减小至零的过程,与古地震、现今地震时空分布及应力测量结果也比较符合,研究结果有助于加深对冰后回弹的动力学过程的认识.  相似文献   

Potential anticancer activity analysis of piscidin 5-like from Larimichthys crocea     

Libing Zheng  Jiayin Qiu  Huihui Liu  Changfeng Chi  Longshan Lin 《海洋学报(英文版)》2022,41(3):53-60

Antitumor activity is one characteristic function of some certain antimicrobial peptides(AMPs) found in recent years. In the present study, we attempted to detect potential anticancer activity of a recombinant piscidin 5-like from Larimichthys crocea(r Lc-P5L) which owned widely antibacterial and strong antiparasitic activity in vitro.The light microscope observation indicated r Lc-P5L was of antitumor activity to He La cells, 293 T cells and L929 cells. MTT assay showed the toxic sensitivity of...  相似文献   

西北印度洋脊的厘定及其地质构造特征          下载免费PDF全文

余星  韩喜球  邱中炎  王叶剑  唐立梅 《地球科学》2019,44(2):626-639

西北印度洋的洋脊系统目前以"中印度洋脊"和"卡尔斯伯格脊"分别指示南北两段,两者的分界点被认为是澳大利亚板块与印度板块的板块边界与洋脊的交点,但具体分布位置不明确.基于已有的地质、地球物理和地球化学等多方面特征,认为卡尔斯伯格脊和中印度洋脊可以统一称为"西北印度洋脊",从罗德里格斯三联点一直延伸到欧文断裂带.新的洋脊厘定将有助于更全面地了解整个西北印度洋的洋脊演化和地球动力学过程.西北印度洋脊地形上南北两端断裂较少,中间断层密集,形似吸管的弯折部位,调节洋脊的转向.重力异常显示沿脊轴方向两端高中间低的特征,表明两端岩浆供给相对充足,而中间断层密集区岩浆量少.磁异常特征显示清晰的分带性,指示多阶段的洋脊扩张历史.岩石地球化学特征显示南北两个同位素相对富集洋脊段,可能与热点作用相关,或与残留岩石圈或地壳物质对亏损软流圈地幔的富集改造有关.  相似文献   

新疆阿斯塔那古墓群出土彩塑马尾装饰物的科学分析     

陈涛  贺婧婧  姚书文  邱振威  麦慧娟  王博  蒋洪恩 《第四纪研究》2019,39(1):258-263

阿斯塔那古墓群是新疆发现的最为重要的历史时期遗址之一,一直以来备受学术界关注。由于吐鲁番盆地气候炎热干燥,阿斯塔那古墓群保存下了数以万计的珍贵文物,其中包括颇为少见的各种泥俑。文章利用红外光谱、纤维旋转实验和显微形态观察等方法对阿斯塔那古墓群出土彩塑泥俑的马尾装饰物进行了科学分析,结果显示这些纤维来自于原产于近东、地中海沿岸的亚麻(Linum usitatissimum L.)。同时,结合出土文书,探讨了唐代吐鲁番地区亚麻的栽培利用状况,为深入认识亚麻传入中国的时间和路线提供了新的科学依据。  相似文献   

基于TRIGRS模型的浅层滑坡稳定性分析     

何简吟  邱海军  胡胜  杨文璐  裴艳茜  杨冬冬  张焱  马舒悦  曹明明 《第四纪研究》2019,39(5):1222-1234

采用基于网格的瞬态降雨入渗(TRIGRS)模型,以滑坡灾害频发的陕南安康市东部巴山东段白河县为研究区,探讨模型适用性及不同降雨条件下边坡稳定性空间分布规律。根据中国土壤分布图并结合已有研究,选取模拟所需的水土力学参数。将模拟所得研究区稳定性分布图与实际滑坡目录对比分析进行TRIGRS模型精度评估,分别模拟连阴雨和短时间强降雨两种降雨情景,探讨研究区边坡稳定性空间分布规律,结果表明:1)TRIGRS模型在模拟预测降雨诱发型浅层滑坡时,结合受试者特征ROC曲线进行精度评估,曲线下面积为0.752,说明此模型在白河县进行滑坡模拟时具有一定的合理性与准确性,能反应该地区滑坡灾害的空间分布特征;2)连阴雨情景模拟下,极不稳定区域主要集中在北部低山地貌区,以冷水镇和麻虎镇为主,随降雨历时增加向东部和南部增多,西部仓上镇、西营镇和双丰镇的极不稳定区域面积较少,能承受长时间连续性降雨。短时间强降雨对边坡稳定性的影响更为直接,极不稳定区域随降雨强度增大而增加,以冷水镇和麻虎镇为主要防范区域。结合地形分析,极陡峭区域边坡稳定性最差,无法承受持续性降雨和高强度降雨,较陡峭区域更易受到降雨历时和降雨强度的影响,而平缓区域则能承受长时间及高强度的降雨;3)TRIGRS模型根据不同降雨条件预测易发生滑坡灾害的区域,为滑坡实时预报警系统提供了新的可能方法。  相似文献   

内蒙古苏宏图地区黏土岩矿物组成与地球化学特征     

邱晓兵  刘平辉  刘晓东 《江苏地质》2019,43(2):253-262

为探究内蒙古苏宏图地区黏土岩的地球化学特征、沉积物质来源和构造环境,利用多晶X射线衍射（XRD）和ICP-AES/MS分析法对苏宏图地区SZK-2井20件黏土岩岩芯样品进行分析测试。结果表明：XRD分析显示苏宏图地区黏土岩中黏土矿物组成以伊利石为主,伊利石质量分数平均值为37.64%;与大陆上地壳相比,黏土岩相对富集SiO2、Al2O3、Zr、As,贫P2O5、MgO、MnO、Cr、Ni,两者的K2O、TiO2、Sr、Ba含量接近。黏土岩中稀土元素特征为轻稀土元素富集,重稀土元素相对亏损,表现为明显的右倾,出现明显的Eu（平均值=0.60）负异常和Ce（平均值=1.01）轻微负异常,与大陆上地壳稀土元素的配分模式较为相似;K2O/Na2O-SiO2和微量元素构造背景判别图解中,样品多数落在大陆岛弧区,少量落在活动大陆边缘,反映了苏宏图地区沉积时期的物源来自于上地壳长英质物源且形成于大陆岛弧的构造背景中。  相似文献   

胶东三山岛金矿床黄铁矿显微结构和微量元素特征:对金富集机制的指示          下载免费PDF全文

邱志伟  李占轲  袁中正 《地球科学》2022,47(1):290-308

三山岛金矿床是位于胶东金矿集区西北部的超大型破碎带蚀变岩型金矿床.该矿床细致的矿相学及元素地球化学研究尚有不足,限制了对其金富集机制及过程的理解.基于野外地质调查和室内矿相学研究将该矿床划分为4个成矿阶段:石英?绢云母?黄铁矿阶段(I)、石英?金?黄铁矿阶段(I I)、石英?金?多金属硫化物阶段(I I I)和碳酸盐?...  相似文献