中国服务业政策效应及其影响因素     

周侃  申玉铭  任旺兵 《地理学报》2011,66(10):1355-1367

通过对中国31 个省(市、自治区)近4000 个服务业企业的问卷调查,从服务业企业认知与体验的视角出发,对“十一五”时期中国服务业政策效应进行综合测度和影响因素分析,进而探讨服务业政策与服务业企业的作用机制,并提出中国服务业政策调整和优化的建议。结果表明： “十一五”时期服务业企业对服务业政策的认知水平不高,认知度受到营业额、劳动力素质、行业类型、行业地位和政策环境等因素的显著影响。企业对服务业政策的体验水平接近比较满意, 影响政策体验水平的因素主要有政策认知度、员工人数、效益、所有制类型、行业地位和政策环境等。针对中国服务业政策与服务业企业的作用机制,应从深化服务业体制改革、完善社会保障体系、平衡内外资鼓励政策、拓宽政策支持覆盖面、构建服务业企业对服务业政策实施情况的反馈机制等方面着手,推动转型期中国服务业向高比重、高效率方向发展。  相似文献   

青藏高原西北部帕米尔东北缘构造地貌与活动构造研究   总被引：4，自引：1，他引：3       下载免费PDF全文

潘家伟  李海兵  J.Van der Woerd  孙知明  裴军令  司家亮  邱祝礼 《第四纪研究》2009,29(3):586-598

新生代以来,印度板块与欧亚大陆的碰撞和持续的汇聚在青藏高原西北部的帕米尔地区造成了强烈的陆内变形,形成一系列典型的构造地貌。文章在卫片解译、DEM数据处理的基础上,结合野外地质、地貌观察与测量,对帕米尔东北缘的构造地貌与活动构造特征进行了研究,取得以下认识： 1)在英吉沙地区,通过测量地貌变形面计算出英吉沙背斜隆起高度约为230m,并利用面积平衡法估算出英吉沙背斜的最小构造缩短量约为110m,参考前人的年代学数据计算出英吉沙背斜在中更新世以来的最低隆升速率约为0.23mm/a,最小构造缩短速率约为0.11mm/a; 2)在帕米尔前缘,乌泊尔断裂为一条伴随右旋走滑分量的逆冲断裂,该断裂的右旋走滑作用错断了古近纪地层及流过断裂的河流,通过测量单次地震造成的水系错断量并参考前人研究的该地区大震复发周期约为1000年,估算出该断裂的平均走滑速率为 4.0～6.8mm/a,并推测断裂开始活动的时间大约在 2.2～3.0Ma以前; 3)对喀什地区构造地貌特征的观察与研究表明,明尧勒－喀什背斜和阿图什－踏浪河背斜可能分别为帕米尔东北缘西昆仑山山前冲断带和西南天山山前冲断带的前缘,该地区以西,帕米尔东北缘西昆仑山和西南天山两大构造系统已经发生了碰撞和拼贴。  相似文献   

山西娘子关泉钙华记录的MIS12/11以来的气候和植被历史   总被引：1，自引：0，他引：1       下载免费PDF全文

刘再华  孙海龙  张金流 《地学前缘》2009,16(5)

对山西娘子关绵河不同阶地上沉积的泉钙华进行了高精度的230Th定年和碳氧稳定同位素组成测定。结果发现,绵河II级阶地沉积的娘子关泉钙华的最老年龄在407～466ka,远老于早前通过钙华中的石英砂热发光法(TL)获得的年龄,即绵河II级阶地上的娘子关泉钙华是在中更新世MIS12/11阶段形成的,而非原来认为的是晚更新世的产物。由此推测,绵河III级阶地娘子关泉钙华形成的年代更早,可能是中更新世的MIS14/13阶段。230Th测年获得的绵河I级阶地顶部的钙华形成于5ka前,即是在全新世中期以前形成的。结合钙华规模及其碳氧稳定同位素组成分析进一步发现,上述绵河三级阶地上的娘子关泉钙华均主要是湿热气候下的产物。然而,自II级阶地钙华形成至今,气候总体上在向干冷方向发展,泉域植被则呈现退化的趋势。  相似文献   

Changes in climate and vegetation in Niangziguan Spring Watershed of Shanxi Province since MIS12/11 recorded by the spring tufa.          下载免费PDF全文

LIU Zai-Hua SUN Hai-Long ZHANG Jin-Liu 《地学前缘》2009,16(5):99

  相似文献   

The effect of diapycnal mixing on the ventilation and CFC-11 uptake in the Southern Ocean     

Yongqi GAO  Helge DRANGE 《大气科学进展》2004,21(5):755-766

1. Introduction Ocean General Circulation Models (OGCMs) arekey tools in the assessment of the future ocean up-take of atmospheric greenhouse gases and heat. Fur-thermore, whereas nature experiences one realisationof the climate state, climate models can be used as alaboratory to produce a multitude of climate realisa-tions, and by that contribute to the understanding ofthe variability and stability properties of the system.It is, in this respect, crucial to evaluate the climatemodels ag…  相似文献   

DINI11数字水准仪观测资料处理软件     

王雪莹  谢庆胜  张有林  周必才 《地震地磁观测与研究》2004,25(3):81-86

介绍了编制DINI11数字水准仪观测资料后,处理软件的设计思路和实现方法,该软件自动完成观测资料入库、计算、打印手簿、成果表和画时序图等任务。  相似文献   

罗氏沼虾仔虾及蚤状Ⅺ期幼体对盐度突变的适应试验   总被引：1，自引：0，他引：1  

刘洪军  王金山  王进河  冯蕾 《海洋湖沼通报》1998,(1)

本文试验了罗氏沼虾仔虾及Z11期幼体对盐度突变的适应能力。试验结果表明,0．82cm的仔虾由盐度10．8‰放入淡水中及0．98cm的仔虾由淡水直接放放20‰以下盐度水中培育,对虾仔的成活影响不明显;Z11期幼体由盈度17‰直接放入7—17‰盐度水中和由盐度10．8‰放入4—10．8％盐度水中以及淡化后第二天由淡水直接放入17‰盐度水中培育,对幼体的成活率无明显影响,幼体能正常蜕皮变态。  相似文献   

The possible companions of young radio pulsars     

Simon F. Portegies Zwart †  Lev R. Yungelson † 《Monthly notices of the Royal Astronomical Society》1999,309(1):26-30

We discuss the formation of pulsars with massive companions in eccentric orbits. We demonstrate that the probability for a non-recycled radio pulsar to have a white dwarf as a companion is comparable to that of having an old neutron star as a companion. Special emphasis is given to PSR B1820−11 and PSR B2303+46. Based on population synthesis calculations we argue that PSR B1820−11 and PSR B2303+46 could very well be accompanied by white dwarfs with mass ≳1.1 M_⊙. For PSR B1820−11, however, we cannot exclude the possibility that its companion is a main-sequence star with a mass between ∼0.7 M_⊙ and ∼5 M_⊙.  相似文献   

High-resolution magnetostratigraphy and micropalaeontology across the J/K boundary strata at Brodno near ilina, western Slovakia: summary of results     

Vclav Hou a  Miroslav Krs  Marta Krsov  Otakar Man  Petr Pruner  Daniela Venhodov 《Cretaceous Research》1999,20(6):699

This study summarizes the final results of magnetostratigraphic and micropalaeontological investigations of the Tithonian/Berriasian boundary (J/K) limestones at the locality of Brodno near ilina, Western Carpathians, West Slovakia. The aim is to prepare the background for correlation of a Late Tithonian and Early Berriasian biostratigraphic zonation with global magnetoevents (manifested in detailed magnetostratigraphic profiles) between the Tethyan realm and other regions, particularly the Boreal and Pacific realms. Suitable physical properties of the limestones studied, a favourable geological setting and rich microfossil assemblages (calpionellids) at Brodno (magnetozones M21r to M18r) allowed a systematic collection of new data on the original synoptic section, which now has the character of a high-resolution profile across the J/K boundary. Two reverse subzones detected within magnetozones M20n and M19n are named ‘Kysuca Subzone’ and ‘Brodno Subzone’, respectively. Both can be correlated with analogous subzones in the M-sequence of marine anomalies. Their existence can also be confirmed in the Bosso Valley section in Umbria, central Italy. A detailed study of the interval between magnetozones M20n and M17r in the Bosso Valley profile is presently in its final stage. Both magnetostratigraphic profiles, from the Brodno and Bosso Valley localities, were thoroughly investigated in the intervals close to the J/K boundary and are still unique among continent-based profiles in the detection and precise definition of both reverse subzones within M20n and M19n. Samples collected from the boundary strata of the reverse Kysuca Subzone at Brodno indicated a transition from N (R) to R (N) polarity of the Earth's palaeomagnetic field within a time interval of c. ±5 ka. Limestone samples (total number N=368) were subjected to progressive thermal demagnetization in 10–12 thermal fields and to subsequent multi-component analysis of remanence. The C-component, as the carrier of palaeomagnetic directions, was determined in the temperature interval of 300° to 540°, or possibly 580°C. Magnetomineralogical analyses of pilot samples and unblocking temperatures determined for all samples showed that magnetite is the carrier of remanent magnetization. The positions of the individual events of calpionellid stratigraphy relative to the global magnetic polarity timescale are precisely defined. The base of the Calpionella Standard Zone, which is considered a provisional J/K boundary indicator in ammonite-free sections in the Tethyan realm, lies within magnetozone M19n at the level of 35% of its local thickness. None of the boundaries in the calpionellid zonation coincides precisely with any of those in the palaeomagnetic zonation, but the first appearance ofCalpionella grandalpina , indicating the base of the Intermedia Subzone, lies in close proximity to the base of magnetozone M19r.  相似文献   

澳大利亚夏季大雪与南极海冰三个气候开关   总被引：2，自引：1，他引：1       下载免费PDF全文

杨冬红  杨学祥 《地球物理学进展》2007,22(5):1680-1685

通过对澳大利亚气温资料和环南极海冰资料对比验证,我们发现澳大利亚夏季大雪与对面南极大陆海冰增加在时间上有一一对应关系.我们在2003年就提出,环南极海冰变化是全球气候变化的调节器,德雷克海峡海冰在全球气候变化中起重要作用.2006年澳大利亚夏季大雪验证了这一结论:气候和构造是地球系统中的两个相关因素,它们受天文周期控制.德雷克海峡海冰的减少加快了环南极西风漂流,减慢了南太平洋环流,使东澳大利亚暖流变弱,为南极冷空气袭击澳大利亚东南部的塔斯马尼亚岛创造了条件.特别值得指出的是,潮汐有1.1、2.06、2.2、10、11、22、31、56、62年变化周期,潮汐周期与太阳黑子周期的叠加效应为解释厄尔尼诺、气温、海温、海冰、地磁、地震的11年和22年周期变化提供了理论根据.  相似文献