首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1306篇
  免费   188篇
  国内免费   460篇
  1954篇
  2024年   4篇
  2023年   31篇
  2022年   48篇
  2021年   54篇
  2020年   78篇
  2019年   36篇
  2018年   63篇
  2017年   58篇
  2016年   60篇
  2015年   47篇
  2014年   69篇
  2013年   103篇
  2012年   108篇
  2011年   112篇
  2010年   117篇
  2009年   102篇
  2008年   95篇
  2007年   159篇
  2006年   142篇
  2005年   111篇
  2004年   74篇
  2003年   57篇
  2002年   49篇
  2001年   28篇
  2000年   32篇
  1999年   17篇
  1998年   9篇
  1997年   11篇
  1996年   10篇
  1995年   11篇
  1994年   9篇
  1993年   8篇
  1992年   2篇
  1991年   4篇
  1990年   5篇
  1989年   3篇
  1988年   3篇
  1987年   3篇
  1986年   2篇
  1985年   6篇
  1984年   3篇
  1983年   3篇
  1982年   3篇
  1981年   4篇
  1980年   1篇
排序方式: 共有1954条查询结果,搜索用时 7 毫秒
141.
由于甲亢的一些症状和体征类似于正常妊娠中发生的正常生理变化,且孕期甲亢及其治疗对妊娠结果和胎儿可能的不良影响,所以给孕期甲亢的诊疗带来困难.孕期甲亢息者应尽快接受抗甲状腺药物(antitlayroid drugs,ATD)的治疗并应经常接受胎儿和孕妇甲亢及甲减征象的监测.孕妇和围产期的并发症发生率直接与母亲甲亢的控制有关,应对所有甲亢妇女进行促甲状腺受体抗体(thyrotrophin receptor antibody,TRAb)的评估.所有妊娠剧吐患者均应测定甲状腺功能,少数妊娠剧吐短暂甲亢孕妇需ATD治疗.  相似文献   
142.
各位代表、道教界各位朋友:在党中央、国务院的亲切关怀下,中国道教协会第七次全国代表会议今天隆重开幕了。这次会议,是新世纪中国道教界的一次盛会,会议将全面总结中国道教协会第六次全国代表会议以来的工作,研究确定今后一个时期中国道教协会的工作任务,选举产生新一届中国道协领导班子。开好这次会议,对于做好新世纪的道教工作具有十分重要的意义。借此机会,我代表中共中央统战部向全国道教界人士和广大信教群众表示热烈的祝贺,向支持和关心道教事业的各界人士表示衷心的感谢。中国道教协会是全国道教徒的爱国组织和教务组织,是党和政府…  相似文献   
143.
三生石故事考辨   总被引:1,自引:0,他引:1  
严春华 《宗教学研究》2007,835(2):171-174
三生石故事广为流传,但是对其流传中产生分歧的疑惑在宋代就已经提出,其后各个朝代亦有人关注,但是一直没有得到合理的解释,本文拟就对三生石故事进行考辨,以期对此问题给出合理的解释。  相似文献   
144.
This investigation examined the impact of social support messages on patient health outcomes. Forty‐one American Indian, Alaska Native, and Native Hawaiian patients received a total of 618 e‐mail messages from their healthcare provider (HCP). The e‐mail messages were divided into 3,565 message units and coded for instances of emotional social support. Patient glycosulated hemoglobin scores (HbA1c) showed significantly improved glycemic control and emotional social support messages were associated with significant decreases in HbA1c values. Patient involvement with the system, measured by system login frequency and the frequency of uploaded blood glucose scores to the HCP, did not predict change in HbA1c.  相似文献   
145.
作为西行求法的第一人,法显对佛教在中国的立足与传播有着极其重要的意义。他对佛教思想、佛教制度在中国的传播与发展,佛教从宗教走向信仰方面有着他人无可比拟的开创作用。法显西行所取经书丰富了中国佛学宝库;律藏的搜求与翻译对佛教僧团制度的完善与发展起到了重要作用;《佛国记》中对印度各地佛教供养行为的记录与传播,对推动佛教在中国从贵族走向平民,从宗教走向信仰,起了极大的引导作用。法显西行其始也简,而成之却也巨。  相似文献   
146.
147.
Joint maximum likelihood estimation (JMLE) is developed for diagnostic classification models (DCMs). JMLE has been barely used in Psychometrics because JMLE parameter estimators typically lack statistical consistency. The JMLE procedure presented here resolves the consistency issue by incorporating an external, statistically consistent estimator of examinees’ proficiency class membership into the joint likelihood function, which subsequently allows for the construction of item parameter estimators that also have the consistency property. Consistency of the JMLE parameter estimators is established within the framework of general DCMs: The JMLE parameter estimators are derived for the Loglinear Cognitive Diagnosis Model (LCDM). Two consistency theorems are proven for the LCDM. Using the framework of general DCMs makes the results and proofs also applicable to DCMs that can be expressed as submodels of the LCDM. Simulation studies are reported for evaluating the performance of JMLE when used with tests of varying length and different numbers of attributes. As a practical application, JMLE is also used with “real world” educational data collected with a language proficiency test.  相似文献   
148.
This study examined the factorial structure of the Chinese version psychological sense of school membership scale (C-PSSM) (Cheung and Hui Asia Pacific Education Review, 4(1), 67–74, 2003). Five hundred and thirty-four university students from Hong Kong completed an 18-item C-PSSM and data were analyzed using exploratory factor analysis and confirmatory factor analysis. In addition, tests of measurement invariance and latent mean differences were performed. From the results of the CFA, two items were deleted and a 3-factor, 16-item C-PSSM model was found to have an acceptable fit, with acceptable level of internal consistency for each factor and the overall scale. Measurement invariance (configural, metric, and partial scalar) of the 16-item C-PSSM was supported and the tests of latent mean differences revealed no statistical significance in factor score differences between male and female participants in this study. Overall, this study contributed to the literature by generating new insights on to the psychological sense of school membership through validating the C-PSSM on a sample from a culture and age group different from those reported in the current literature.  相似文献   
149.
150.
Personalized recommendation has important implications in raising online shopping efficiency and increasing product sales. There has been wide interest in finding ways to provide more efficient personalized recommendations. Most existing studies focus on how to improve the accuracy and efficiency of the recommendation algorithms or are more concerned on ways to reduce perceived risks and thus increase consumer satisfaction. Unlike these studies, our study begins from the decision‐making process of consumers, using consumers' two‐stage decision‐making system and preference inconsistency theory as a basis, to reveal the mechanisms involved in consumers' acceptance of recommendations. This paper analyzes the effect of personalized recommendations from two angles, recommendation timing and product portfolio, tries to point out differences in consumer preferences between similar products and related products, and verifies that consumers demand diversity in the recommended content. The study analyzes differences in the acceptance of personalized recommendations between practical products and hedonic products and discovers that recommendations of hedonic products are more effective than that of practical products. Based on the research earlier, the study provides suggestions on how to better plan and operate a personalized recommendation system. Copyright © 2016 John Wiley & Sons, Ltd.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号