全文获取类型
收费全文 | 1831篇 |
免费 | 30篇 |
国内免费 | 24篇 |
专业分类
系统科学 | 40篇 |
丛书文集 | 107篇 |
教育与普及 | 30篇 |
理论与方法论 | 46篇 |
现状及发展 | 50篇 |
综合类 | 1612篇 |
出版年
2024年 | 2篇 |
2023年 | 6篇 |
2022年 | 9篇 |
2021年 | 21篇 |
2020年 | 4篇 |
2019年 | 13篇 |
2018年 | 11篇 |
2017年 | 8篇 |
2016年 | 14篇 |
2015年 | 29篇 |
2014年 | 62篇 |
2013年 | 70篇 |
2012年 | 102篇 |
2011年 | 129篇 |
2010年 | 89篇 |
2009年 | 121篇 |
2008年 | 101篇 |
2007年 | 141篇 |
2006年 | 131篇 |
2005年 | 94篇 |
2004年 | 105篇 |
2003年 | 95篇 |
2002年 | 68篇 |
2001年 | 65篇 |
2000年 | 66篇 |
1999年 | 50篇 |
1998年 | 35篇 |
1997年 | 42篇 |
1996年 | 20篇 |
1995年 | 27篇 |
1994年 | 24篇 |
1993年 | 21篇 |
1992年 | 17篇 |
1991年 | 28篇 |
1990年 | 19篇 |
1989年 | 12篇 |
1988年 | 12篇 |
1987年 | 13篇 |
1986年 | 7篇 |
1985年 | 2篇 |
排序方式: 共有1885条查询结果,搜索用时 15 毫秒
41.
通过人类对物质结构认识的发展简史以及粒子物理的重大进展,说明科学是类似于永无止境的迷宫,不可能走向终极。 相似文献
42.
创新是知识经济的核心,是时代对教育的挑战。物理教师应认真研究创新教育理论,提高自身的创新能力,更新教学方法和手段,并在教学中努力培养学生的创新精神。 相似文献
43.
本文论述了当前军事院校物理教学中存在的一些问题:教学观念、教学方法、教学手段的落后,物理教学与实验、与其它学科和军事应用之间的脱节现象,提出了相应的对策。 相似文献
44.
张忠玉 《曲靖师范学院学报》1990,(1)
本文从师专教学的角度初步探讨了开展中国古代物理学史教学的积极作用,分析了现阶段这方面教学的一些问题,并提出自己的一点粗浅的改进办法。 相似文献
45.
This paper discusses some philosophical aspects related to the recent publication of the experimental results of the 2017 black hole experiment, namely the first image of the supermassive black hole at the center of galaxy M87. In this paper I present a philosophical analysis of the 2017 Event Horizon Telescope (EHT) black hole experiment. I first present Hacking's philosophy of experimentation. Hacking gives his taxonomy of elements of laboratory science and distinguishes a list of elements. I show that the EHT experiment conforms to major elements from Hacking's list. I then describe with the help of Galison's Philosophy of the Shadow how the EHT Collaboration created the famous black hole image. Galison outlines three stages for the reconstruction of the black hole image: Socio-Epistemology, Mechanical Objectivity, after which there is an additional Socio-Epistemology stage. I subsequently present my own interpretation of the reconstruction of the black hole image and I discuss model fitting to data. I suggest that the main method used by the EHT Collaboration to assure trust in the results of the EHT experiment is what philosophers call the Argument from Coincidence. I show that using this method for the above purpose is problematic. I present two versions of the Argument from Coincidence: Hacking's Coincidence and Cartwright's Reproducibility by which I analyse the EHT experiment. The same estimation of the mass of the black hole is reproduced in four different procedures. The EHT Collaboration concludes: the value we have converged upon is robust. I analyse the mass measurements of the black hole with the help of Cartwright's notion of robustness. I show that the EHT Collaboration construe Coincidence/Reproducibility as Technological Agnosticism and I contrast this interpretation with van Fraassen's scientific agnosticism. 相似文献
46.
This paper criticizes the traditional philosophical account of the quantization of gauge theories and offers an alternative. On the received view, gauge theories resist quantization because they feature distinct mathematical representatives of the same physical state of affairs. This resistance is overcome by a sequence of ad hoc modifications, justified in part by reference to semiclassical electrodynamics. Among other things, these modifications introduce ”ghosts”: particles with unphysical properties which do not appear in asymptotic states and which are said to be purely a notational convenience. I argue that this sequence of modifications is unjustified and inadequate, making it a poor basis for the interpretation of ghosts. I then argue that gauge theories can be quantized by the same method as any other theory. On this account, ghosts are not purely notation: they are coordinates on the classical configuration space of the theory—specifically, on its gauge structure. This interpretation does not fall prey to the standard philosophical arguments against the significance of ghosts, due to Weingard. Weingard’s argumentative strategy, properly applied, in fact tells in favor of ghosts’ physical significance. 相似文献
47.
String theorists are certain that they are practicing physicists. Yet, some of their recent critics deny this. This paper argues that this conflict is really about who holds authority in making rational judgment in theoretical physics. At bottom, the conflict centers on the question: who is a proper physicist? To illustrate and understand the differing opinions about proper practice and identity, we discuss different appreciations of epistemic virtues and explanation among string theorists and their critics, and how these have been sourced in accounts of Einstein's biography. Just as Einstein is claimed by both sides, historiography offers examples of both successful and unsuccessful non-empirical science. History of science also teaches that times of conflict are often times of innovation, in which novel scholarly identities may come into being. At the same time, since the contributions of Thomas Kuhn historians have developed a critical attitude towards formal attempts and methodological recipes for epistemic demarcation and justification of scientific practice. These are now, however, being considered in the debate on non-empirical physics. 相似文献
48.
丘名实 《海南师范大学学报(自然科学版)》2004,17(1):83-86
认为基础教育课程改革的不断深入对物理教师提出了新要求,对实习生教育教学能力进行科学、准确、全面的评价将影响培养的过程和结果.并对中学物理教育实习的评价理念、评价内容、评价方法、评价的实施进行了研究,同时提出了中学物理教育实习工作的模式. 相似文献
49.
改革物理课堂教学模式初探 总被引:1,自引:0,他引:1
郝加波 《达县师范高等专科学校学报》2005,15(2):81-82
通过对传统物理课堂教学模式弊端的分析,结合教学实践,提出增加设计性实验,开放实验室,激发学生兴趣,启迪思维,提高学生创新能力的教学改革方案. 相似文献
50.