全文获取类型
收费全文 | 920篇 |
免费 | 66篇 |
出版年
2023年 | 18篇 |
2022年 | 5篇 |
2021年 | 13篇 |
2020年 | 20篇 |
2019年 | 48篇 |
2018年 | 63篇 |
2017年 | 74篇 |
2016年 | 66篇 |
2015年 | 49篇 |
2014年 | 46篇 |
2013年 | 164篇 |
2012年 | 39篇 |
2011年 | 39篇 |
2010年 | 30篇 |
2009年 | 33篇 |
2008年 | 23篇 |
2007年 | 12篇 |
2006年 | 8篇 |
2005年 | 16篇 |
2004年 | 12篇 |
2003年 | 12篇 |
2002年 | 10篇 |
2001年 | 13篇 |
2000年 | 12篇 |
1999年 | 7篇 |
1998年 | 4篇 |
1997年 | 8篇 |
1996年 | 7篇 |
1995年 | 11篇 |
1993年 | 8篇 |
1992年 | 6篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1986年 | 4篇 |
1977年 | 9篇 |
1976年 | 5篇 |
1975年 | 4篇 |
1972年 | 5篇 |
1971年 | 4篇 |
1970年 | 3篇 |
1969年 | 5篇 |
1968年 | 3篇 |
1967年 | 4篇 |
1966年 | 4篇 |
1965年 | 3篇 |
1964年 | 3篇 |
1961年 | 3篇 |
1960年 | 3篇 |
1959年 | 4篇 |
1950年 | 3篇 |
排序方式: 共有986条查询结果,搜索用时 15 毫秒
31.
32.
This paper studies the territorial effects of the LEADER approach in Southern Europe, by analysing the region of Andalusia (Spain). Our research has revealed that, in many cases, projects were concentrated in the most dynamic, most populated areas, with a well-established business network with the financial and organizational capacity required to access European funding. In these areas, the economic leadership of the most dynamic municipalities has been reinforced at the expense of more depressed areas with little social capital and few businesses. These programmes have not, therefore, helped to mitigate territorial imbalances. In a minority of rural areas, however, this trend was not observed, which shows that although territorial inequality is a widespread problem in the practice of neo-endogenous rural development, it does not affect all areas to the same degree. 相似文献
33.
Siniša Malešević 《Nations & Nationalism》2018,24(2):292-299
34.
35.
36.
Joan Negre Facundo Muñoz Juan Antonio Barceló 《Journal of Archaeological Method and Theory》2018,25(3):777-794
Most quantitative approaches to distributional analysis in archaeology assume a homogeneous study surface that is amenable to easy generalisations. This framework has been widely used to describe settlement processes, disregarding the spatial heterogeneity inherent to geographic reality. In other words, researchers have often assumed that the correlation between the elements of a spatial distribution is a function of the Euclidean distance (i.e. straight line distance) between them. Other archaeological studies have tested alternative measures to Euclidean distances, such as cost-based ones, both to describe optimal routes and to assess spatial autocorrelation in a point pattern. Nevertheless, until now there has been no suitable model to introduce these measures into spatial statistical equations. In order to overcome this obstacle, we approach the implementation problem inversely by embedding the spatial pattern under study into a Euclidean frame of reference based on its cost-distance pairwise matrix. This paper describes the application of this methodology on one of the main tools used by archaeologists to assess settlement patterns: Ripley’s K function. We present two case studies, covering both macroscale and mesoscale, with significant variations in the results depending on the use of the Euclidean or cost-based approach. Data, functions and results have been R-packaged for the sake of reproducibility and reusability, allowing other researchers to build upon our methods. 相似文献
37.
38.
Pablo Navarro Esteve Santiago Yudici Oliver José Luis Denia Ríos María Teresa Martín Sánchez Jaime Rodríguez Pereña 《International Journal of Architectural Heritage》2018,12(2):169-177
The restoration of paintings on elements in cultural heritage buildings (fundamentally, churches) involves two structural problems: capturing the geometry of the construction element and its development. In many cases, the geometries are regular (e.g., cylinders, spheres, elliptical domes). However, there are cases in which the elements cannot be adapted to any known geometry, much less one that can be mathematically developed. The development of surfaces becomes essential for the restoration of paintings over “flat elements” (over which work is performed on the ground) that are subsequently transferred to the real surface (ceilings). The mathematical transformations that allow regular geometries to be developed are widely known (cartographic projections). However, when the geometry is irregular, there is no development. This study presents a new methodology based on differential rectification and its application for the development of oculi in the Los Santos Juanes Church (Valencia), whose geometry is completely irregular both in shape and as a result of construction defects (and damage caused by fire). The present study focuses on the restoration of paintings damaged by fire. 相似文献
39.
Barbara Voorhies Natalia Martínez-Tagüeña 《The Journal of Island and Coastal Archaeology》2018,13(1):43-65
A vibrant artisanal fishery of the brackish water marsh clam (Polymesoda acuta) is located in the lower Río Tempisque, Costa Rica. Fishermen harvest clams from shoals according to tidal and lunar cycles. They take most clams directly to riverside processing stations to be cooked and sold as salted meat, although some cooked clams are dried, and others sold live. Processing activities result in the formation of shellmounds that share significant similarities and some differences with ancient marsh clam shellmounds of coastal Chiapas, Mexico. In this study, procurement and processing activities are described and quantified, revealing the substantial amount of labor and skill involved in the modern fishery. Implications for archaeological preservation and predictions from optimal foraging theory are evaluated. 相似文献
40.
L.F. Ramos A.C. Núñez García P.B. Lourenço 《International Journal of Architectural Heritage》2018,12(3):465-485
ABSTRACTThe “Quartel das Esquadras” is an 18th century infantry barrack located within the limits of the bulwarked fortress of Almeida, in Portugal. An ongoing adaptive reuse project of the building aims to recover its full capacity and also its importance, by implementing a variety of new uses. The architectural intervention results in the need of the structure to withstand new and diverse imposed loads. As the current configuration of the structure will be altered, the main objective of this article is to evaluate the suitability of some of the proposed structural interventions. The current condition has been characterized following a multidisciplinary approach comprising historical research, visual inspection, non-destructive testing, and structural analysis to identify the possible sources of major structural problems. A portion of the building particularly affected by the alterations has been selected to carry out structural analysis. A comparative safety assessment of the selected area in both current and altered condition has been done through finite element modelling and nonlinear static analysis, resulting in an identification of the weaker points against the new implemented loads and alterations. Finally, proposals for the implementation of the studied intervention, as well as recommendations for future research and analyses, have been given. 相似文献