首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   112篇
  免费   1篇
  2024年   1篇
  2023年   1篇
  2022年   2篇
  2021年   1篇
  2020年   5篇
  2019年   3篇
  2018年   3篇
  2017年   3篇
  2016年   9篇
  2015年   10篇
  2014年   2篇
  2013年   10篇
  2012年   10篇
  2011年   6篇
  2010年   9篇
  2009年   8篇
  2008年   5篇
  2007年   6篇
  2006年   9篇
  2005年   3篇
  2002年   2篇
  2001年   2篇
  2000年   2篇
  1998年   1篇
排序方式: 共有113条查询结果,搜索用时 31 毫秒
81.
运用Arc GIS平均最近邻、核密度估计和波段集统计等方法,考察长春市中心城区银行网点空间特征和规律,以及银行网点与人口和主要经济活动的空间关系,发现:①银行网点呈明显集聚分布特征,这种集聚主要分布于商业和商务中心及新建中高档住宅小区密集地段;②银行网点核密度与其到CBD距离呈负相关,并随距离地增加呈对数衰减;③银行网点密度与人口-经济活动密度在街道甚至更小空间尺度上存在较显著的正相关;④银行网点核密度与大型商业网点和主要写字楼核密度均呈较强正相关,而与大型制造业企业核密度几乎不存在相关性,说明商业和楼宇经济空间特征对城市内部银行网点布局具有深刻影响,而制造业的微观区位对银行网点布局几乎无影响。  相似文献   
82.
本文通过研究深圳华侨城社区居民日常活动特征及其差异,探讨城市居民的社区依赖性。因子分析界定了5种社区日常活动因子:低社区依赖性活动距离、低社区依赖性活动频率、高社区依赖性活动频率、工作的频率与距离以及高社区依赖性活动距离,累积解释率达63.597%。研究进一步表明:女性低社区依赖性活动的时间距离远于男性;居民对社区的依赖性随着年龄的增长而增强;居民对社区的依赖性随着学历的增长而降低;居民对社区的依赖性随着收入的增长而降低;居民对社区的依赖性随着家庭结构的扩大和老龄化而增强;居民高社区依赖性活动频率随着居住时长的增长而提高。  相似文献   
83.
Since the discovery of the proto-Shang culture, created mostly by ancestors of the Shang clan from the late Neolithic Age to the early Shang period (∼2000–1600 BC), the subsistence strategy and lifestyle of humans in China during their movement southwards have been a great focus. Chinese literature and archaeological findings suggest that the proto-Shang societies were composed of different cultural groups and had various subsistence strategies. For example, at the Liuzhuang site, three types of burials, i.e., stone coffin, wooden coffin and earthen shaft-pit, are found. The wooden coffin and earthen shaft-pit burials had been adopted locally in the Central Plains since the Neolithic Age while the stone coffin burials were usually used by people living in Northeast China and had never been found in the Central Plains before. In this study, stable carbon and nitrogen isotopic analyses were performed on human bones from the Liuzhuang site and animal bones from Zhangdeng site in Henan province, China to determine whether different social groups had various accesses to food resources and whether their dietary difference was related to inequality in social status. Humans have mean δ13C and δ15N values of −7.6 ± 0.6‰ and 9.6 ± 1.0‰ (n = 19) respectively, which strongly indicates that humans rely primarily on C4-based food. The main contribution of C4-based food in their diet is from millet agriculture or animals that consume millet by-products. The isotopic spacing of carbon and nitrogen isotopic values between pigs and humans, between dogs and humans, and between cattle and humans, all imply that these animals were the main meat resources for humans. Surprisingly, the δ13C values and δ15N values of humans with different types of burials are quite close, indicating that they had equal access to food resources. This result suggests that the proto-Shang humans had adapted to the local subsistence strategy, and the local cultural factors in the Central Plains were very well integrated into proto-Shang culture.  相似文献   
84.
A pollen diagram was prepared from Lake Almalou, a volcanic crater wetland located on the eastern flanks of the Sahand Volcanic Complex in NW Iran. The core provides a 3700-year record of human activity and environmental change in an upland region. We attempt to relate vegetation changes to both climatic change and historical events. Variations of anthropogenic pollen indicators suggest several phases of intensified human activities. Two strongly expressed agricultural phases are dated at about 2450–2220 cal BP (Achaemenid Empire) and 230–30 cal BP (collapse of Safavid Dynasty to the modern period). Historical rather than climatic events appear to be the main controlling factors for upland land-use dynamics. Fruticulture has been practiced in the region at least since the Iron Age, reaching its maximum importance 1500–1250 cal BP during the reign of Sassanid Empire; it declined by the time of Islamic conquest of Iran (651 AD). The Little Ice Age is tangibly recorded by higher lake water levels most probably due to both lower summer temperatures and higher annual precipitations. Low values of cereal-type and cultivated tree pollen during this period may indicate a change in the lifestyle from the cultivation of fields and orchards to a more nomadic life dominated by summer pasture. The modern period (1850 AD onwards) is characterized by expansion of agricultural activities to upland areas and intensified pastoralism.  相似文献   
85.
ABSTRACT

Why do university students participate in extra-curricular activities in China? What do they seek in a meaningful education? This paper explains the rising interest in extra-curricular activities by looking into students’ frustration about classroom-bounded education in China’s universities. A transforming socio-economic landscape and increasing imagination about global modernity have inspired new neoliberal demands for practical knowledge and personal meaning. And yet, China’s universities have failed to keep up with students’ changing visions of education, success, and productive personhood. This paper explores students’ agentive pursuit of sociability and emotional sensitivity through extra-curricular activities as a lens to examine the fluidity of meaning-making in contemporary China. In the process, I discuss why self-reported aspirations in skill cultivation cannot encompass the range of motivations that have driven students to extra-curricular participation, and explain how the ethnographic method can help to address gaps of knowledge in inquiries about youthful aspirations.  相似文献   
86.
Plant residues recovered from prehistoric stone artifacts can be used to help explain tool function and plant use. At the Changning site in Qinghai Province, Northwest China, dating from 4000 yr BP, we examined starch granules extracted from three slate stone knives. A total of 153 starch grains were retrieved from three stone knives, from which we identified starches from legumes, the Triticeae tribe, foxtail millet (Setaria italica), broomcorn millet (Panicum miliaceum), roots and tubers. These results indicate that the stone knives may have been used for a variety of activities that included reaping grasses and food processing. The species of starch grains retrieved from the study sample reveal that diverse crops were cultivated at the Changning site 4000 years ago.  相似文献   
87.
This paper examines civil activities to protect and conserve the underground war-related sites in contemporary Japan. Conservation movements rooted in local communities and centred on the Japanese Network to Protect War-Related Sites are making efforts to transform the dark heritage of war-related sites into cultural property in an attempt to integrate diverse wartime experiences. In delving into the heritage-making practices, I introduce local movements in Okinawa and Okayama. Okinawa hosts the first underground war-related site to become a cultural property, the Haebaru Army Hospital Bunkers, while Okayama struggles to create another one by making the Kamejima Mountain Underground Plant a dark heritage site. I argue that these conservation movements are challenging the homogenising national war memory by attaching ethnically diversified vernacular memories to the underground sites. In doing so, these underground war-related sites have become public spaces where new forms of social engagement are negotiated and contested.  相似文献   
88.
During the Iron Age a subsistence economy based on mixed farming existed in the Dutch wetlands. A model based on subsistence is put forward and tested against the archaeozoological data of 27 sites in order to gain insight into the role of animal husbandry. The model confirms that cattle husbandry was the dominant form of animal husbandry but pigs and sheep were also important at some sites. Although a high number of pig bones were expected, their role is mostly insignificant. An explanation is sought in their lack of secondary products and their competition with humans for the scarce cereals in the wetlands. The mortality profiles for cattle are largely in accordance with the subsistence model. Older cattle are used for traction, milk and herd security and sheep were mainly kept for their meat but also for their milk and wool. Differences in animal husbandry between sites also exist. At two sites more cattle were killed for their meat and at three sites the proportion of older cattle was larger than expected. Although this first test renders the subsistence model viable, it needs to be tested against more sites with larger bone samples.  相似文献   
89.
Studies in evolutionary economic geography have found that knowledge spillovers, crucial for the development and maintenance of clusters, tend to flow between sectors that are related via similar inputs and/or outputs. Thus, there is a growing body of literature stating that industrial variety within clusters is beneficial for economic growth, whereby local industrial diversity sparks creativity, new ideas and innovations. Within this context, the Irish Maritime and Energy Resource Cluster (IMERC) is a diverse, multisectoral cluster. Using an Input–Output table this paper examines the intra-cluster linkages, as well as the relatedness in terms of inputs and outputs across the four IMERC pillars: Marine Energy; Shipping, Logistics and Transport; Maritime Safety and Security; and Yachting Products and Services. This analysis found that although IMERC has weak intra-cluster linkages, the four pillars share a high number of related inputs and outputs. Based on this analysis, IMERC has the potential to develop into a strong maritime cluster.  相似文献   
90.
The Zhokhov site is one of the northern most archaeological sites in the world and a very ancient vestige of occupation of high latitudes by people, indicating that this territory was settled as early as about 8000 years ago. Investigation of the site began in 1989–1990 and then continued in 2000–2005. Here we consider the taphonomy, spatial distribution, species and age- and sex-related composition of the faunal remains from the Zhokhov site. These data allow conclusions regarding the subsistence strategy practiced by Zhokhov inhabitants, including the hunting tactics. This was a peculiar adaptation model based on reindeer and polar bear hunting in a 2:1 ratio. Reindeer hunting was all-seasonal, whereas polar bears were hunted mostly in winters at their dens. Mortality data for reindeer and polar bears depict the yearly subsistence cycle. The Zhokhov site is found to be a base camp occupied year-round with modest summer activities, while wintertime is characterised by intense polar bear hunting. Most reindeer were hunted in the fall. Subsistence strategy of the Zhokhov hunters was largely facilitated by the fact that at the time of occupation Zhokhov Island was still part of the coastal Siberian plain margin.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号