全文获取类型
收费全文 | 4129篇 |
免费 | 133篇 |
国内免费 | 122篇 |
专业分类
教育 | 2421篇 |
科学研究 | 502篇 |
各国文化 | 3篇 |
体育 | 839篇 |
综合类 | 448篇 |
文化理论 | 2篇 |
信息传播 | 169篇 |
出版年
2023年 | 19篇 |
2022年 | 42篇 |
2021年 | 61篇 |
2020年 | 114篇 |
2019年 | 75篇 |
2018年 | 74篇 |
2017年 | 75篇 |
2016年 | 97篇 |
2015年 | 118篇 |
2014年 | 251篇 |
2013年 | 354篇 |
2012年 | 308篇 |
2011年 | 350篇 |
2010年 | 265篇 |
2009年 | 218篇 |
2008年 | 263篇 |
2007年 | 300篇 |
2006年 | 255篇 |
2005年 | 216篇 |
2004年 | 207篇 |
2003年 | 181篇 |
2002年 | 146篇 |
2001年 | 116篇 |
2000年 | 86篇 |
1999年 | 51篇 |
1998年 | 33篇 |
1997年 | 22篇 |
1996年 | 23篇 |
1995年 | 16篇 |
1994年 | 20篇 |
1993年 | 7篇 |
1992年 | 5篇 |
1991年 | 8篇 |
1990年 | 3篇 |
1989年 | 4篇 |
1977年 | 1篇 |
排序方式: 共有4384条查询结果,搜索用时 31 毫秒
991.
通过实例探讨利用三要素法、解微分方程法和复频域分析法求解含受控源电路的过渡过程。提出在分析、求解含受控源电路的过渡过程时,应视具体情况而采用适当的方法. 相似文献
992.
高校思想政治理论课教学效果影响因素及改善途径 总被引:1,自引:1,他引:0
作为大学生政治理论和思想教育的主阵地和主渠道,思想政治理论课存在教学效果不强、评价不高等问题。这些问题是多方面原因导致的,大学生对思想政治理论课的认知存在偏差,思想政治理论课教学形式、手段滞后,教学内容的针对性和时效性不强,任课教师自身素质不够高等。提升高校思政理论课的教学效果,需要在教学方法、教材选用、教师素质等方面做出改进。 相似文献
993.
The attitudes of young people arise from an intense interaction with their social groups of reference, and in this work we examine the extent to which this background conditions the individual environmental attitudes of the young. Using data provided by the PISA 2006 survey for the European Union, we test for the influence of the family, the characteristics of the school, and the social interactions or school peer group on attitudes toward the environment. The existence of social interactions, as well as the important role of family characteristics and school activities, are confirmed. The results allow us to emphasize the importance of the social context of the adolescent, and the need to take this into account as a channel that amplifies the influence of specific environmental education strategies. 相似文献
994.
Davi Kallman 《International Journal of Disability, Development & Education》2017,64(6):644-662
Individuals with disabilities comprise the largest minority group in the world, yet they are the most underrepresented minority group in higher education, the job market and entertainment media such as literature. This population is often underrepresented because of the overlapping physical, attitudinal and policy barriers that prevent them from participating fully in society. Despite their large numbers, individuals with disabilities not only encounter personalised prejudice, but also experience institutionalised prejudice. In an effort to reduce negative attitudes toward individuals with disabilities, this study examined the effects of positive disability exemplars on people’s attitudes. A comparison between implicit and explicit measures of prejudice found that implicit bias of able-bodied students was more entrenched than explicit biases. 相似文献
995.
Joseph M. Currin Randolph D. Hubach André R. Durham Katherine E. Kavanaugh Zachary Vineyard Julie M. Croff 《Sex education》2017,17(6):667-681
The information shared in schools on sex education in the USA is highly variable depending on the state and sometimes city in which a student lives. Gay and bisexual students living in a socially conservative, primarily rural state such as Oklahoma often receive little information about sexual health information that pertains to their behaviours unless it is discussing the dangers of sex. Using a qualitative approach, 20 gay and bisexual men currently residing in Oklahoma completed semi-structured interviews about their experiences with sex education and alternate ways to compensate for lack of information provided. Participants noted an awareness of the lack of meaningful sex education or if it was offered, a primary focus on abstinence-only until marriage heteronormative curricula. Participants described various ways they compensated for lack of sex education including accessing pornography and information from the internet. With the current socio-political environment of Oklahoma, it is unlikely wholesale changes to the sex education curricula can be made. The importance of public health professionals using the internet and peer educators to deliver inclusive and informative sexual health information remains salient and viable for men who reside in socio-politically conservative areas like Oklahoma. 相似文献
996.
马锦华 《洛阳师范学院学报》2011,30(2):114-116
采用量表法以358名高中学生为被试样本进行心理测验,考察职业高中学生与普通高中学生缺陷感量表各因子与情感各纬度的关系.结果显示,普通高中学生正性情感和快乐感均显著高于职高学生;职业高中学生自尊心较低,自信心不足;自尊与学习能力是情感各纬度稳定有力的预测指标,它们能预测职高学生的负性情感和预测普高学生的正性情感.体能预测职高学生的正性情感,人际自信和外貌预测普高学生的负性情感. 相似文献
997.
高等职业院校单独招生改革是国家招生录取制度改革的重大举措。通过2009、2010两届艺术设计类专业单招生源与普通高考艺术类生源在教学实践中的对比,分析了艺术设计类单招生源的特点,并提出了针对单招生源在人才培养方案上的改革措施。 相似文献
998.
Quantitative trait loci (QTL) and their additive, dominance and epistatic effects play a critical role in complex trait variation. It is often infeasible to detect multiple interacting QTL due to main effects often being confounded by interaction effects. Positioning interacting QTL within a small region is even more difficult. We present a variance component approach nested in an empirical Bayesian method, which simultaneously takes into account additive, dominance and epistatic effects due to multiple interacting QTL. The covariance structure used in the variance component approach is based on combined linkage disequilibrium and linkage (LDL) information. In a simulation study where there are complex epistatic interactions between QTL, it is possible to simultaneously fine map interacting QTL using the proposed approach. The present method combined with LDL information can efficiently detect QTL and their dominance and epistatic effects, making it possible to simultaneously fine map main and epistatic QTL. 相似文献
999.
"新媒体使用"经常作为与"传统媒体使用"相对立的概念获得学界的关注。然而,随着技术的快速发展,媒体家族的迅速壮大,"新媒体使用"在量化研究中的内涵外延也日渐模糊。对此,本文提出了一个元测试(meta-instrument)问题--在用户使用行为和媒介效果两方面,新媒体和传统媒体是否清晰可分?基于对二手数据的分析,本文发现不同的网络信息渠道/平台在使用频率上呈现异质性,在媒介效果上也难以作为同质化的"新媒体"或"网络媒体"一概而论。同时,门户网站在用户使用频率和使用效果上,更接近于传统媒体(如中央电视台、新华社和人民日报),而非社交媒体(如微博、微信等)。本文的研究发现为新媒体使用及其效果研究提供了新的思路,为新媒体理论的发展提供了新的经验资料。 相似文献
1000.
《档案利用与“黑天鹅事件”——论档案利用的小概率及不可预测》一文具有一定的创新性和合理性,但也存在认知偏颇之处。本文针对该文提到的“黑天鹅事件”的概念定义、事件特征、具体案例及档案价值不可知等观点,在分析“黑天鹅事件”的概念和特征的基础上,结合我国档案利用的实际情况并通过剖析文章所列举的案例等与之进行了商榷。最终认为,该文所归纳的档案利用的特征及列举的案例不符合“黑天鹅事件”的特征、档案价值具有相对可知性。 相似文献