全文获取类型
收费全文 | 1351篇 |
免费 | 31篇 |
出版年
2024年 | 2篇 |
2023年 | 11篇 |
2022年 | 10篇 |
2021年 | 18篇 |
2020年 | 35篇 |
2019年 | 13篇 |
2018年 | 26篇 |
2017年 | 24篇 |
2016年 | 20篇 |
2015年 | 38篇 |
2014年 | 20篇 |
2013年 | 71篇 |
2012年 | 91篇 |
2011年 | 119篇 |
2010年 | 117篇 |
2009年 | 138篇 |
2008年 | 102篇 |
2007年 | 106篇 |
2006年 | 103篇 |
2005年 | 91篇 |
2004年 | 18篇 |
2003年 | 51篇 |
2002年 | 36篇 |
2001年 | 30篇 |
2000年 | 32篇 |
1999年 | 16篇 |
1998年 | 8篇 |
1997年 | 6篇 |
1996年 | 10篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 7篇 |
1992年 | 4篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
排序方式: 共有1382条查询结果,搜索用时 15 毫秒
101.
刘衍钢 《世界古典文明史杂志》2011,5(1)
机械武器是古典欧洲最具特色的军事装备之一,亦是古典欧洲科学技术成就的集中体现.在罗马帝国时代,古典机械武器发展到复杂成熟阶段.本文从原始文献入手,通过分析有关机械武器的最重要记载,对晚期罗马帝国的机械装备状况分类进行具体考察. 相似文献
102.
刘雅媛 《中国历史地理论丛》2020,(1):92-102
学界对于传统中国城市空间近代转型相对缺乏关注。通过对上海县城的研究发现,在人口压力增加、城市用地紧张、环境恶化及租界示范效应的多重作用下,明清治所城市空间结构不再适用于20世纪初的上海县城,城市空间亟待改造。上海县城市政机构的设立为解决这一需求提供了制度保障与财力支持,故县城得以开展前所未有的大规模建设,包括道路、排水、桥梁、码头、义冢迁移、公地改造、市容清理等,以不同以往的空间结构重塑了上海县城。这种因人地关系紧张带来的适应性改善不限于上海一地,而具有普遍性的意义。 相似文献
103.
刘军 《世界古典文明史杂志》2011,5(1)
作为古代斯巴达社会组织形式之一的奥巴见于古风时代斯巴达之重要文献"大瑞特剌".但相关希腊文传世文献颇为晚出,于其具体情形语焉不详.然而于拉格尼亚地区之铭文材料中颇可见奥巴一词,抑或其方言表达形式.此种铭文包括嘉许令、球戏铭文及圣法三类,共计19则.上述铭文固然亦多属希腊化时代晚期及其后的时代,但可据以厘清晚出传世文献所记奥巴情况之时代属性,若与传世文献相参证,对于认识希腊化时代晚期及罗马统治时期奥巴在斯巴达之历史实情亦颇有助益. 相似文献
104.
This paper investigates spatial trends of multigenerational adult families in metropolitan Sydney. Australia's immigrant gateway city, Sydney has high housing costs and infrastructure pressures, and planning policies support higher residential densities. In this context, the accommodation of persons living in multigenerational families is examined, by major region of origin, their geographies in Sydney, and by housing costs and constraints. Results highlight that cultural origins were influential in multigenerational household formations, and such formation is higher in areas of first and second ethnic community formation areas. Multigenerational living is also more common in middle ring and outer areas of cheaper housing. Implications are drawn for more nuanced housing policies in Sydney and comparable cities, given that detached and semi‐detached houses were favoured by these households, whereas two‐fifths of new housing constructed in Sydney in 2011 consists of two or less bedroom apartments. 相似文献
105.
Pore pressure and fluid flow during the deformational history of geologic structures are directly influenced by tectonic deformation events. In this contribution, 2D plane strain finite element analysis is used to study the influence of different permeability distributions on the pore pressure field and associated flow regimes during the evolution of visco‐elastic single‐layer buckle folds. The buckling‐induced fluid flow regimes indicate that flow directions and, to a lesser degree, their magnitudes vary significantly throughout the deformation and as a function of the stratigraphic permeability distribution. The modelling results suggest that the volumetric strain and the permeability distribution significantly affect the resulting flow regime at different stages of fold development. For homogeneous permeability models (k > 10?21 m2), low strain results in a mostly pervasive fluid flow regime and is in agreement with previous studies. For larger strain conditions, fluid focusing occurs in the buckling layer towards the top of the fold hinge. For low permeabilities (<10?21 m2), local focused flow regimes inside the buckling layer emerge throughout the deformation history. For models featuring a low‐permeability layer embedded in a high‐permeability matrix or sandwiched between high‐permeability layers, focused flow regimes inside the folded layer result throughout the deformation history, but with significant differences in the flow vectors of the surrounding layers. Fluid flow vectors induced by the fold can result in different, even reversed, directions depending on the amount of strain. In summary, fluid flow regimes during single‐layer buckling can change from pervasive to focused and fluid flow vectors can be opposite at different strain levels, that is the flow vectors change significantly through time. Thus, a complete understanding of fluid flow regimes associated with single‐layer buckle folds requires consideration of the complete deformation history of the fold. 相似文献
106.
Haifeng Liu 《Frontiers of History in China》2007,2(4):493-512
China’s imperial examinations greatly influenced the East Asian world. Japan imitated it during the eighth to tenth centuries;
its subjects include xiucai, mingjing, jinshi, mingfa, as well as medicine and acupuncture. Korean imperial examinations are the longest and most comprehensive ones among other
East Asian countries. Vietnam was the last to abolish the imperial examinations. All three East Asian countries imitated China
in their imperial examinations, which greatly raised their cultural levels.
Translated by Yang Chunyan from Xueshu Yuekan 学术月刊 (Academic Monthly), 2006, (12): 136–142 相似文献
107.
Although many scholars have assert that the Egyptian women’s position in the family was high during the time of the Pharaohs,
no research in China has made a comprehensive and systematic discussion over this issue so far. Based on both documents and
archaeological materials, this article approaches this question in three aspects: (1) Egyptian women’s position in the family
economy; (2) the affection between the husband and the wife; (3) the position and role of the mother.
__________
Translated from Shijie Lishi 世界历史 (World History), 2004, (2): 11–20 相似文献
108.
关于区位论发展的探讨 总被引:1,自引:0,他引:1
本文分析了西方区位理论的发展历程,论述了我国区位论的研究现状,并提出了区位论对完善地理学理论、拓宽实践领域的重要意义,以及区位论研究中存在的问题。 相似文献
109.
论浦东新区的社区分化——整合运动的特征及其发展趋势 总被引:2,自引:0,他引:2
社区是一定地域人们生活的共同体,社区建设是维护社会稳定和社会经济可持续发展的重要环节。浦东开发是中国二十一世纪"龙头"城市建设工程,浦东新区社区建设不仅是浦东开发开放顺利进行的保障,也必将在全国产生积极的示范效应。本文从时代背景到地域发展纵深透视我国社区及浦东新区社区建设的兴起,并运用社区分化-整合系统分析理论对当前及今后浦东新区社区及其分化-整合运动进行剖析,提出五点调整完善浦东新区社区整合模式的建议。 相似文献
110.