全文获取类型
收费全文 | 237篇 |
免费 | 4篇 |
国内免费 | 1篇 |
专业分类
管理学 | 30篇 |
民族学 | 3篇 |
人口学 | 3篇 |
丛书文集 | 14篇 |
理论方法论 | 17篇 |
综合类 | 140篇 |
社会学 | 15篇 |
统计学 | 20篇 |
出版年
2023年 | 2篇 |
2021年 | 3篇 |
2020年 | 3篇 |
2019年 | 5篇 |
2018年 | 4篇 |
2017年 | 8篇 |
2016年 | 5篇 |
2015年 | 5篇 |
2014年 | 12篇 |
2013年 | 31篇 |
2012年 | 18篇 |
2011年 | 16篇 |
2010年 | 7篇 |
2009年 | 15篇 |
2008年 | 11篇 |
2007年 | 15篇 |
2006年 | 7篇 |
2005年 | 18篇 |
2004年 | 8篇 |
2003年 | 8篇 |
2002年 | 13篇 |
2001年 | 10篇 |
2000年 | 5篇 |
1999年 | 3篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1991年 | 1篇 |
排序方式: 共有242条查询结果,搜索用时 0 毫秒
1.
2.
本文以二甘醇代替其它多元醇与已二酸反应合成聚酯多元醇 ,再以合适的OH/NCO比与二异氰酸酯TDI生产聚氨酯胶粘剂 .成本低 ,各项粘接性能达到或超过同类产品 .同时利用了制备乙二醇时的副产品二甘醇 ,一举数得 相似文献
3.
陈佑松 《西南交通大学学报(社会科学版)》2002,3(4):53-61
18 5 4年中西修约交涉是中国近代史上的一个关键之点 ,其结果直接影响了中国以后的历史发展进程 ,而其过程又体现了当时中西两种完全不同的国际关系观念与体制的冲突 相似文献
4.
赵越 《湛江师范学院学报》2003,24(5):28-31
作为一种重要的语音现象,仅从可区别词义及词性来解释轻声的存在因由是不能令人信服的。轻声在语流中的语音修饰作用所带给我们的审美感受使得它的存在有理有据。 相似文献
5.
刘加良 《河南大学学报(社会科学版)》2008,48(5)
<民事诉讼法>全面修改的现实紧迫性依然存在,对其新近之小改予以理性的审视,定会对其全面修改有所裨益.修法目的具有明显的功利性、修法过程的民主性始终不足、修法背后的轻程序倾向强势存在和修法方式的科学性严重缺失是<民事诉讼法>新近修改的四大瑕疵.<民事诉讼法>进行全面修改须以此为鉴并设法予以克服. 相似文献
6.
Dimitris N. Trakas Mathaios Panteli Nikos D. Hatziargyriou Pierluigi Mancarella 《Risk analysis》2019,39(1):195-211
The increased frequency of extreme events in recent years highlights the emerging need for the development of methods that could contribute to the mitigation of the impact of such events on critical infrastructures, as well as boost their resilience against them. This article proposes an online spatial risk analysis capable of providing an indication of the evolving risk of power systems regions subject to extreme events. A Severity Risk Index (SRI) with the support of real‐time monitoring assesses the impact of the extreme events on the power system resilience, with application to the effect of windstorms on transmission networks. The index considers the spatial and temporal evolution of the extreme event, system operating conditions, and the degraded system performance during the event. SRI is based on probabilistic risk by condensing the probability and impact of possible failure scenarios while the event is spatially moving across a power system. Due to the large number of possible failures during an extreme event, a scenario generation and reduction algorithm is applied in order to reduce the computation time. SRI provides the operator with a probabilistic assessment that could lead to effective resilience‐based decisions for risk mitigation. The IEEE 24‐bus Reliability Test System has been used to demonstrate the effectiveness of the proposed online risk analysis, which was embedded in a sequential Monte Carlo simulation for capturing the spatiotemporal effects of extreme events and evaluating the effectiveness of the proposed method. 相似文献
7.
《Risk analysis》2018,38(8):1534-1540
An extreme space weather event has the potential to disrupt or damage infrastructure systems and technologies that many societies rely on for economic and social well‐being. Space weather events occur regularly, but extreme events are less frequent, with a small number of historical examples over the last 160 years. During the past decade, published works have (1) examined the physical characteristics of the extreme historical events and (2) discussed the probability or return rate of select extreme geomagnetic disturbances, including the 1859 Carrington event. Here we present initial findings on a unified framework approach to visualize space weather event probability, using a Bayesian model average, in the context of historical extreme events. We present disturbance storm time (Dst ) probability (a proxy for geomagnetic disturbance intensity) across multiple return periods and discuss parameters of interest to policymakers and planners in the context of past extreme space weather events. We discuss the current state of these analyses, their utility to policymakers and planners, the current limitations when compared to other hazards, and several gaps that need to be filled to enhance space weather risk assessments. 相似文献
8.
Sebastian Steinker Kai Hoberg Ulrich W. Thonemann 《Production and Operations Management》2017,26(10):1854-1874
To be efficient, logistics operations in e‐commerce require warehousing and transportation resources to be aligned with sales. Customer orders must be fulfilled with short lead times to ensure high customer satisfaction, and the costly under‐utilization of workers must be avoided. To approach this ideal, forecasting order quantities with high accuracy is essential. Many drivers of online sales, including seasonality, special promotions and public holidays, are well known, and they have been frequently incorporated into forecasting approaches. However, the impact of weather on e‐commerce operations has not been rigorously analyzed. In this study, we integrate weather data into the sales forecasting of the largest European online fashion retailer. We find that sunshine, temperature, and rain have a significant impact on daily sales, particularly in the summer, on weekends, and on days with extreme weather. Using weather forecasts, we have significantly improved sales forecast accuracy. We find that including weather data in the sales forecast model can lead to fewer sales forecast errors, reducing them by, on average, 8.6% to 12.2% and up to 50.6% on summer weekends. In turn, the improvement in sales forecast accuracy has a measurable impact on logistics and warehousing operations. We quantify the value of incorporating weather forecasts in the planning process for the order fulfillment center workforce and show how their incorporation can be leveraged to reduce costs and increase performance. With a perfect information planning scenario, excess costs can be reduced by 11.6% compared with the cost reduction attainable with a baseline model that ignores weather information in workforce planning. 相似文献
9.
WILL JOHNCOCK 《Journal for the theory of social behaviour》2012,42(3):241-259
The notion that body modification occurs when one undertakes practices like tattooing, piercing or scarification, engenders discourses in which: (i) body modifiers endorse such practices as self‐constructive, distancing their practitioners from social regulation and a deterministic biology, whereas; (ii) critics condemn their seemingly violent, corporeal interference. However, in suspecting that such analysis should be attentive to the concurrent individual and social co‐constitution of behaviours, a sociological and post‐structural interrogation of this characterization of body modification as a “sovereign, denaturalizing” endeavour is demanded. An engagement with the originary violence of Derridian deconstruction will duly re‐conceive body modification practice as not something which introduces violence to corporeality. Rather, violence will present as a primordial differentiating process which bodies always already condition, and by which they are conditioned/produced/modified. The second issue at stake in this article will thus develop as a contestation to the characterization of “body modification” as an exclusive category of practice. Such practices do not arrive, pre‐existing, but rather manifest as the originary violence/differentiation of bodies‐as‐modifications‐which‐modify. This re‐defines modification from something that agentive subjects introduce to bodies, to something that subjects‐as‐bodies cannot help but be. Consequently, individual agency is not divorced from behaviour, but emerges as a corporeal, social production. 相似文献
10.
王荣 《复旦学报(社会科学版)》2007,1(6):129-137
20世纪40年代出现在延安"解放区"的叙事诗歌《王贵与李香香》,随着建国前后"新的人民文艺"建设及其文本的"经典化"过程,以及当代中国社会及其意识形态的变迁,作品版本也经由出版者及作者的多次修改而形成了不尽相同的文学版本及其文本形态.本文从文献学及版本资料研究的角度着手,通过对其作品版本的流传及其变迁与文本修改的汇校及分析,探讨不同时期及其时代背景之下"当代文学"的政治印记及意义变化,以及中国当代叙事诗歌的艺术建构及其文学史叙述等. 相似文献