全文获取类型
收费全文 | 750篇 |
免费 | 15篇 |
专业分类
765篇 |
出版年
2025年 | 1篇 |
2024年 | 15篇 |
2023年 | 15篇 |
2022年 | 13篇 |
2021年 | 12篇 |
2020年 | 33篇 |
2019年 | 37篇 |
2018年 | 35篇 |
2017年 | 18篇 |
2016年 | 27篇 |
2015年 | 23篇 |
2014年 | 22篇 |
2013年 | 112篇 |
2012年 | 55篇 |
2011年 | 40篇 |
2010年 | 33篇 |
2009年 | 36篇 |
2008年 | 39篇 |
2007年 | 31篇 |
2006年 | 27篇 |
2005年 | 21篇 |
2004年 | 15篇 |
2003年 | 13篇 |
2002年 | 26篇 |
2001年 | 13篇 |
2000年 | 20篇 |
1999年 | 11篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 3篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有765条查询结果,搜索用时 0 毫秒
1.
William Andrefsky Jr. 《Journal of Archaeological Research》2009,17(1):65-103
Researchers who analyze stone tools and their production debris have made significant progress in understanding the relationship
between stone tools and human organizational strategies. Stone tools are understood to be morphologically dynamic throughout
their use-lives; the ever-changing morphology of stone tools is intimately associated with the needs of tool users. It also
has become apparent to researchers that interpretations of lithic analysis are more productive when the unique contexts and
situations for which lithic artifacts were made, used, modified, and ultimately discarded are considered. This article reviews
the recent literature on stone tool production with an emphasis on raw material procurement, manufacturing techniques, and
tool maintenance processes as they relate to adaptive strategies of toolmakers and users. 相似文献
2.
Special iron objects in the form of a narrow plate with a fan-shaped blade on one or both ends, but with a substantial variation in shape and size, have continually been excavated from ancient historical sites located in the southern part of the Korean peninsula. The frequency and abundance of their excavation imply that they must have played a crucial role in the initial shaping of the Korean iron industry. Little is known, however, of their intended purposes or the exact engineering processes applied in their production. Speculation suggests that they might have been used as currencies or intermediate materials for the making of finished products. This study examined the microstructures of three such iron objects from the Korean Three Kingdoms Period (ca. 300–600 AD). It was determined that they were made of low carbon iron generally containing a number of non-metallic inclusions, with hints of surface carburization particularly at the ends of the plates. These results reveal the likely presence of an iron technology based primarily on the bloomery technique as opposed to the Chinese style of iron-making based on cast iron technology, which was also in use in ancient Korea. 相似文献
3.
Heather A. Larsen‐Price 《政策研究杂志》2012,40(1):147-168
This article investigates how presidential policy attention is allocated across policy tools and whether there is a channeling of tool use by policy area. I also examine whether there is evidence of disproportionate information processing within presidential policy attention allocation and whether it is common across presidential policy tools. Presidential messages, hearings on administrations' legislative proposals, amicus briefs, and executive orders are employed to capture presidential policy tools. The allocation of attention via these four instruments is examined from 1957–2007 in the policy areas of defense and foreign affairs, macroeconomics, banking and commerce, civil rights, law and crime, and labor and immigration. I find that there is a canalization of presidential policy attention by instrument, and that the opportunity structure of policy tools shapes attention allocation. Additionally, I find evidence for punctuated equilibrium theory in the allocation of presidential policy attention via these four tools. When presidents do shift their attention to an issue area, they often attack the issue with some coordination of their policy instruments. 相似文献
4.
Classification of artifacts has long marked a significant edge between theory and practice in archaeology. While considering classification to be a necessary methodological device, most practitioners also recognize that it carries with it built-in assumptions. This essay approaches the issue by way of a specific stone tool type from Old World sites: the burin. By asking “what is a burin?” the study shows the need to reconsider typologies to reflect changes in research questions and progress in dating methods, especially when working with museum collections and secondary data between regions and across national traditions, and the need to study whole collections from the perspective of technological choices. 相似文献
5.
6.
毛志平 《中国文物科学研究》2012,(4):86-89
在现代修复理念的指导下,对一件战国镶红铜鸟兽几何纹青铜壶进行保护修复,通过分析检测与研究、制定修复方案、保护修复处理、装饰工艺等步骤,介绍了现代青铜文物保护修复的基本要求和流程,探讨了此件特殊工艺青铜器的修复工艺,对其精美纹饰和装饰工艺进行赏析,同时提出了保护修复后的保存建议. 相似文献
7.
Marie-Hélène Moncel María Gema Chacón Aude Coudenneau Paul Fernandes 《Journal of archaeological science》2009
The lithic assemblage from the Middle Palaeolithic site of Payre (Rhone Valley, France) contains a large number of convergent tools and pointed tools of various shapes, sizes and retouch types. These were excavated from several archaeological units, dating from marine isotopic stages 8–5, which also yielded human skeletal remains. Consideration of this large tool kit has led to an improved analysis of Middle Palaeolithic tools with two retouched convergent edges. The 350 tools were not described within the classical typological framework, but, rather, from a lithic technological perspective in relation to a discoid debitage. In addition, an initial macroscopic use-wear analysis aided in establishing whether they were used according to their technical and/or morphological features. The Middle Palaeolithic convergent tools from Payre are shown to be quite diversified, and the question of the significance of the retouch and the definition of the various types is addressed. Initial functional results indicate that a clear relationship between shape and function cannot be easily established, and that these tools were used as hand tools. This study contributes to the debate on the use of stone tip spears in the Early European Middle Palaeolithic. 相似文献
8.
档案信息资源开发利用之管见 总被引:1,自引:0,他引:1
推进档案信息资源的开发利用,对经济发展和社会建设具有重要的促进作用。只有从加强档案基础工作和协调管理入手,发挥档案人员的聪明才智,充分借助和运用现代高科技手段,才能使档案信息资源在新的历史时期发挥其应有作用。 相似文献
9.
做好经济新闻报道对于贯彻党和国家有关经济方面的方针、政策,对于客观理性地分析世界经济局势、评判我国经济现状和走向、保持经济平稳较快发展、满足人民群众日益增长的信息需求都具有十分重要的意义。文章指出了长期以来我们在经济新闻报道方面存在的问题,并就这些问题提出了改进方法。 相似文献
10.
Carolin Schurr Katharina Abdo 《Gender, place and culture : a journal of feminist geography》2016,23(1):120-133
The insights of feminist science and technology studies (STS) into the constructed and situated nature of knowledge have proved crucial to informing feminist geography. Since the rise of emotional geographies, feminist methodologies no longer simply reflect on questions of positionality, partiality, and power relations, but also on the role of emotions in the field. In this article, we argue that a feminist STS perspective has much to offer when thinking about the way emotions are engineered, controlled, and negotiated in research processes. Our engagement with what we call ‘social laboratories’ – i.e., spaces in everyday life where (experimental) research is conducted with human beings – advances debates in feminist geography, as these laboratories crystallize the emotional entanglements feminists encounter in the field. Looking at economic experiments in Ghana and fertility clinics in Mexico, we discuss the difficulties of doing feminist fieldwork in these experimental research spaces. We argue that the constant negotiation of emotions and ethics is crucial to access, assess, and do fieldwork in research settings that do not adhere to feminist ideals, but nevertheless have gendered effects on women's and men's lives. Rethinking ‘the place of emotions in research’ (Bondi 2005, in Emotional Geographies, edited by Joyce Davidson, Liz Bondi, and Mick Smith, 231–246, Aldershot: Ashgate) through social laboratories forges instructive links across feminist/emotional geographies and social studies of science. 相似文献