全文获取类型
收费全文 | 35506篇 |
免费 | 713篇 |
国内免费 | 2篇 |
专业分类
管理学 | 4690篇 |
民族学 | 188篇 |
人才学 | 4篇 |
人口学 | 3207篇 |
丛书文集 | 153篇 |
教育普及 | 1篇 |
理论方法论 | 3209篇 |
综合类 | 549篇 |
社会学 | 16913篇 |
统计学 | 7307篇 |
出版年
2023年 | 244篇 |
2022年 | 159篇 |
2021年 | 256篇 |
2020年 | 584篇 |
2019年 | 777篇 |
2018年 | 986篇 |
2017年 | 1333篇 |
2016年 | 990篇 |
2015年 | 720篇 |
2014年 | 924篇 |
2013年 | 6232篇 |
2012年 | 1242篇 |
2011年 | 1118篇 |
2010年 | 862篇 |
2009年 | 703篇 |
2008年 | 885篇 |
2007年 | 839篇 |
2006年 | 833篇 |
2005年 | 781篇 |
2004年 | 739篇 |
2003年 | 714篇 |
2002年 | 736篇 |
2001年 | 881篇 |
2000年 | 799篇 |
1999年 | 752篇 |
1998年 | 586篇 |
1997年 | 490篇 |
1996年 | 553篇 |
1995年 | 520篇 |
1994年 | 480篇 |
1993年 | 475篇 |
1992年 | 543篇 |
1991年 | 528篇 |
1990年 | 523篇 |
1989年 | 451篇 |
1988年 | 473篇 |
1987年 | 424篇 |
1986年 | 420篇 |
1985年 | 469篇 |
1984年 | 431篇 |
1983年 | 416篇 |
1982年 | 325篇 |
1981年 | 281篇 |
1980年 | 287篇 |
1979年 | 329篇 |
1978年 | 275篇 |
1977年 | 232篇 |
1976年 | 175篇 |
1975年 | 193篇 |
1974年 | 189篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
AbstractOccupancy models are used in statistical ecology to estimate species dispersion. The two components of an occupancy model are the detection and occupancy probabilities, with the main interest being in the occupancy probabilities. We show that for the homogeneous occupancy model there is an orthogonal transformation of the parameters that gives a natural two-stage inference procedure based on a conditional likelihood. We then extend this to a partial likelihood that gives explicit estimators of the model parameters. By allowing the separate modeling of the detection and occupancy probabilities, the extension of the two-stage approach to more general models has the potential to simplify the computational routines used there. 相似文献
12.
AbstractLean Six Sigma (LSS) that offers a unique integration of Lean and Six Sigma has been accepted globally across services sectors. Previous studies that examined the application of LSS in healthcare were steered in traditional hospital settings. Apparently, there are no studies that highlight the application of LSS in mobile hospitals, an emerging trend in the healthcare sector. The aim of this article is to explore the applicability of LSS in a mobile hospital. The authors present a case study of improving patients’ satisfaction in a mobile hospital, through reducing turnaround time. Design-thinking intervention to LSS helped resolve a real-time problem using Define-Measure-Analyze-Design-Verify roadmap. This article contributes to the ‘healthcare quality” body of knowledge and is novel as it is the first of its kind of LSS application in a mobile hospital underpinning Design thinking. This study is unique as it demonstrates academia–industry collaboration in solving an organizational problem. 相似文献
13.
AbstractOne of the most important factors in building and changing communication mechanisms in social networks is considering features of the members of social networks. Most of the existing methods in network monitoring don’t consider effects of features in network formation mechanisms and others don’t lead to reliable results when the features abound or when there are correlations among them. In this article, we combined two methods principal component analysis (PCA) and likelihood method to monitor the underlying network model when the features of individuals abound and when some of them have high correlations with each other. 相似文献
14.
AbstractWith a shift to more automation technology, social acceptance of technology plays an important role in the manufacturing sector. To what extent this occurs, and affects the adoption of technology, has been less researched, but is important in deciding how such technology is introduced, and the nature of the shift from labour-intensive manufacturing to automation. This research applies the revised technology acceptance model (TAM) to examine the impact of social and individual antecedents on the acceptance of automation manufacturing technology. Survey data are collected from 258 Chinese manufacturers. Results suggest that perceived norms significantly affect organizational intention to use automation manufacturing technology both directly and via perceived usefulness; organizational efficacy explains the intention to use via mediating effect of perceived usefulness and perceived ease of use. This research is one of the first extending and applying TAM from individuals to organizations. 相似文献
15.
Heidi M. Levitt Sophie W. Schuyler Rachel Chickerella Allison Elber Lindsey White Rebecca L. Troeger 《Journal of gay & lesbian social services》2020,32(3):261-282
AbstractLGBTQ+?people face multiple challenges to parenthood because of barriers such as discriminatory legislation and policies influencing foster parenting, adoption, and reproductive health services. This study documents these obstacles and examines their impact through a grounded theory analysis of interviews of LGBTQ+?prospective parents. Stressors included social isolation, unnecessary medicalization, prohibitive financial costs related to accessing social and medical services (sometimes across state lines), and being denied services, parental leave, and insurance coverage. Findings indicate that heteronormative attitudes and discrimination can lead to debilitating and enduring harm upon the economic, emotional, and relational well-being of growing LGBTQ+?families. 相似文献
16.
Diana M. Reindl Tera McIntosh Rhiannon Lewis Lauren Gellar 《Journal of gay & lesbian social services》2020,32(3):377-392
Abstract“Women who have sex with women” or WSW have unique perspectives within the LBGTQ spectrum. The purpose of this study included documenting perceptions, feelings, and experiences among WSW. Thirty-seven women participated in six focus groups, ages ranged from 20–64 years. Responses were transcribed and thematically coded. Four themes emerged as influencing factors: shame and fear, community, gender roles, and normalcy. Each major theme produced minor themes providing a context within major themes. Results offer valuable insights that can assist community members, health professionals, and scientists to better appraise the disparities and stigma impacting social and emotional well-being among WSW. 相似文献
17.
AbstractThis article discusses how the history of sports can serve as way to understand abstract concepts associated with local history and social studies education. An introductory discussion outlines how sports can engage and interest students, focusing especially on ideas related to history thinking (such as change and continuity). A case study using the Brooklyn Dodgers’ move to Los Angeles is used to illustrate these ideas, focusing on themes associated with suburbanization and urban renewal. A lesson plan is also provided. 相似文献
18.
Carolyn S. Henry Todd A. Spencer Chao Liu Scott W. Plunkett 《Marriage & Family Review》2020,56(2):174-191
AbstractBased on the value of children theory, the purpose of this study was to develop and establish the factor structure and internal consistency reliability of the Advantages of Children Scale (ACS), a self-report measure of a modification of Hoffman and Hoffman’s value scheme of the psychological needs children meet for their parents. Data were collected from 685 emerging adult men identifying as Latino or Caucasian who were not parents. Results of the confirmatory factor analysis found a good fit for the six hypothesized subscales on the ACS: connectedness, expansion of self, family heritage, adult status and social identity, development of self, and family maintenance. We discuss potential applications of the measure in research and practice. 相似文献
19.
Sara B. Oswalt Alyssa M. Lederer Kimberly Chestnut-Steich Carol Day Ashlee Halbritter Dugeidy Ortiz 《Journal of American college health : J of ACH》2020,68(1):41-51
AbstractObjective: To examine changes in diagnoses/treatment for 12 mental health (MH) conditions, previous use of campus MH services, and willingness to seek MH services in the future. Participants: ACHA–NCHA II participants from 2009 to 2015 (n?=?454,029). Methods: Hierarchical binary logistic regression with step 1 controlling for demographics and step 2 considering time. Results: Time was significant except for bipolar disorder, bulimia, and schizophrenia with increases for all conditions except substance abuse. Anxiety (OR?=?1.68), panic attacks (OR?=?1.61), and ADHD (OR?=?1.40) had the highest odd ratios. Use of MH services at current institution (OR?=?1.30) and willingness to utilize services in the future (OR?=?1.37) also increased over time. Conclusions: Based on a national sample, self-reported diagnoses/treatment of several MH conditions are increasing among college students. This examination of a variety of MH issues can aid college health professionals to engage institutional stakeholders regarding the resources needed to support college students’ MH. 相似文献
20.
Susan M. De Luca Megan C. Lytle Yueqi Yan Chris Brownson 《Journal of American college health : J of ACH》2020,68(3):250-257
AbstractObjective: Suicide is the second leading cause of death among emerging adults, yet little is known regarding their online help-seeking. Participants: The National Research Consortium of Counseling Centers in Higher Education's dataset (N=26,292). Methods: Students across the United States were recruited from 73 four-year institutions to participate during the 2010–2011 school year. Results: Observed the effectiveness of online and traditional help-seeking stratified by recent suicidal ideation related to their most distressful period in the past year. Females and younger students endorsed both types of help-seeking, yet those with recent ideation were less likely to disclose any help-seeking. Among those reporting recent ideation, only females reported that traditional supports were more than moderately helpful. Regardless of whether students endorsed ideation, students who were younger, engaged in risky behaviors and identified as females reported that online resources were more than moderately helpful. Conclusions: Online resources could potentially bridge barriers to traditional help-seeking for those reluctant to seek out care, yet traditional resources were reported to be the most effective among this sample. 相似文献