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   268篇
  免费   25篇
  2024年   1篇
  2023年   3篇
  2022年   2篇
  2021年   5篇
  2020年   16篇
  2019年   12篇
  2018年   15篇
  2017年   11篇
  2016年   11篇
  2015年   10篇
  2014年   9篇
  2013年   54篇
  2012年   24篇
  2011年   11篇
  2010年   17篇
  2009年   20篇
  2008年   12篇
  2007年   5篇
  2006年   7篇
  2005年   7篇
  2004年   2篇
  2003年   5篇
  2002年   1篇
  2001年   4篇
  2000年   2篇
  1999年   1篇
  1998年   6篇
  1997年   4篇
  1996年   3篇
  1995年   5篇
  1994年   2篇
  1990年   1篇
  1988年   1篇
  1980年   2篇
  1979年   1篇
  1978年   1篇
排序方式: 共有293条查询结果,搜索用时 15 毫秒
41.
Abstract

Rescue excavations carried out during the 1970s at the Iron Age hillfort of Broxmouth in East Lothian produced a small assemblage of fish bone. Despite some uncertainties surrounding the recovery of this material, recent analysis has produced highly unusual results. In particular, the presence of large specimens of ling and other species raises the possibility that the Broxmouth community was, at least periodically, engaged in deep-sea fishing. This suggestion is at variance with present understandings of Iron Age fishing strategies which generally envisage more expedient practices, such as line fishing from the shore. Indeed, it has even been suggested that the consumption of fish was avoided altogether in Iron Age Britain, for religious or cosmological reasons. The composition of the Broxmouth assemblage thus has potentially important implications for our understanding of Iron Age marine exploitation.  相似文献   
42.
Abstract

One of the basic areas of interaction between water as natural resource and human societies as agents of cultural transformation is the technology of irrigation. In Africa at least 66 per cent of the available water is used for purposes of irrigation. For more than 4 000 years irrigation has secured food supplies for humans on a continent that is noted for its relative shortage of sufficient natural water supplies.

There is a remarkable hidden power of water in the history of southern Africa. This is particularly the case when we consider the development of early irrigation technologies of Iron Age farmers. The small irrigation furrow of the subsistence farmer was just as important to an insular community of Bantu-speaking people in pre-colonial times, as is the sophisticated irrigation technology in present-day South Africa. Currently there is a paucity of information about pre-colonial indigenous irrigation technology. This can be ascribed to a number of factors of which the invasion of modern Western traditions in the nineteenth century is perhaps the most important. A number of other factors for the apparent blind-spot is also presented in this study.

In southern Africa there are traces of indigenous pre-colonial irrigation works at sites such as Nyanga in Zimbabwe; the Limpopo River Valley; Mpumalanga; and South Africa's eastern Highveld. Reference is also made in this article to specific strategies of irrigation used by Iron Age communities, prior to the advent of a colonial presence. Finally, attention is also drawn to pre-colonial land tenure and state formation against the backdrop of Wittfogel's theories on hydraulic society.  相似文献   
43.
44.
本文对河北徐水东黑山遗址出土的66件战国至唐宋时期铁器样品进行了碳十四年代测定、金相组织观察和夹杂物成分分析,认为该遗址内出土的铁器制作年代集中于战国两汉时期,铁器的材质全为生铁和生铁制钢产品.采用了铸造、退火、炒钢、淬火以及可能存在的灌钢等工艺,同时该地区至少在汉代已能根据不同的材质和工艺制作不同的器物.本研究为深入认识战国两汉时期太行山东麓北段的钢铁技术提供了新的科学材料。  相似文献   
45.
Primary sources from the end of the Bronze Age have long been read as suggesting a time of chaotic transition, particularly with regard to threats from the sea that the established powers had no means of combatting. While the scale and severity of seaborne attacks seems to have increased in the late 13th century, these were not in themselves new phenomena, as a state of maritime threat seems to have been a constant for coastal polities and mariners in the Late Bronze Age eastern Mediterranean. However, a combination of internal and external factors in the late 13th and early 12th centuries combined to make these attacks more effective than they had been in the past, and polities more vulnerable to them. These included the rapid spread of improvements in maritime technology, particularly from the Aegean and the Levant, via high–intensity ‘zones of transference’, as well as an increase in the scale of ship­–based combat operations, due in part to the displacement of people during the Late Bronze Age collapse. This paper addresses this in two parts, beginning with the ‘background’ evidence for a constant state of maritime threat in the centuries leading up to the end of the Bronze Age, and concluding with the ‘foreground’ evidence for zones of transference and the transmission of groundbreaking elements of naval technology in the years surrounding the Late Bronze–Early Iron Age transition.  相似文献   
46.
none 《巴勒斯坦考察季》2013,145(3):203-219
Abstract

The Shephelah was densely settled in the Late Bronze Age, but most of the settlements were gradually abandoned during the transition to the Iron I period. Only a few Iron I settlements existed in the eastern part of the region (excluding the Philistine sites at the northwestern edge of the Shephelah), forming a small Canaanite enclave. During the Iron II period the region was gradually resettled, and it became part of Judah. This process lasted until the 8th century BCE, when the region reached an unparalleled demographic peak. Sennacherib's campaign brought wide-scale destruction, and the region recovered only partially before being devastated by Nebuchadnezzar. After reconstructing the region's settlement history, the article reassesses its political and demographic history in comparison to the neighbouring regions of the Judean highlands and the southern coastal plain, it is concluded that the Shephelah had a lesser role in the history of Judah than some recent studies suggest.  相似文献   
47.
Abstract

Before timber and stone houses were introduced to northern regions, varieties of turf houses were the most commonly used architecture. These houses had a wooden structure encapsulated in a shell constructed of grass turf. The different ethnic groups of the north built their houses in different styles and constructions, but the general principle was the same. The Norse of North Norway and also on the North Atlantic islands had a tendency to build their houses on top of the ruins of previous houses. After a few centuries this arrangement produced a settlement mound of highly organic soil. In the research literature, both the turf architecture and the settlement mounds have been described as adaptations to and a function of marginality and lack of timber. This paper reports an effort to test the idea that turf houses on top of settlement mounds may have been a finely tuned ecological system that made use of the capacity of organic soil to produce heat.  相似文献   
48.
49.
The objective of this paper is to assess the relationship between the cereals cultivated in the Late Bronze and Early Iron Ages (ca. 1250–400 BC) within the area of the present-day Czech Republic, and their environmental settings. The various charred caryopses of cereal species represented in the archaeobotanical assemblages from 35 archaeological sites differ, especially in the proportion of wheat and barley. The cereal assemblages were compared regarding site altitude, weather conditions, soils and soil productivity. The most important environmental variable influencing the choice of a particular crop seemed to be altitude which is correlated with other variables such as the length of growing season, mean annual temperature, soil quality etc. Although the ecological requirements of cereals cultivated in the Late Bronze and Early Iron Ages are not known, they presumably thrived under similar conditions to present-day species/varieties, and the strategy of past crop husbandry was based on similar principles as today, e.g. flexible adaptation to local environmental conditions, in an effort to achieve optimal yields and reduce the danger of crop failure.  相似文献   
50.
This paper presents new 500 year interval palaeogeographic models for Britain, Ireland and the North West French coast from 11000 cal. BP to present. These models are used to calculate the varying rates of inundation for different geographical zones over the study period. This allows for consideration of the differential impact that Holocene sea-level rise had across space and time, and on past societies. In turn, consideration of the limitations of the models helps to foreground profitable areas for future research.  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