全文获取类型
收费全文 | 6635篇 |
免费 | 219篇 |
专业分类
6854篇 |
出版年
2021年 | 57篇 |
2020年 | 113篇 |
2019年 | 133篇 |
2018年 | 171篇 |
2017年 | 217篇 |
2016年 | 216篇 |
2015年 | 160篇 |
2014年 | 188篇 |
2013年 | 743篇 |
2012年 | 304篇 |
2011年 | 328篇 |
2010年 | 210篇 |
2009年 | 214篇 |
2008年 | 266篇 |
2007年 | 282篇 |
2006年 | 239篇 |
2005年 | 234篇 |
2004年 | 227篇 |
2003年 | 201篇 |
2002年 | 213篇 |
2001年 | 104篇 |
2000年 | 113篇 |
1999年 | 107篇 |
1998年 | 92篇 |
1997年 | 85篇 |
1996年 | 94篇 |
1995年 | 87篇 |
1994年 | 78篇 |
1993年 | 62篇 |
1992年 | 81篇 |
1991年 | 61篇 |
1990年 | 52篇 |
1989年 | 51篇 |
1988年 | 51篇 |
1987年 | 42篇 |
1986年 | 46篇 |
1985年 | 63篇 |
1984年 | 59篇 |
1983年 | 51篇 |
1982年 | 72篇 |
1981年 | 71篇 |
1980年 | 52篇 |
1979年 | 52篇 |
1978年 | 44篇 |
1977年 | 66篇 |
1976年 | 40篇 |
1975年 | 48篇 |
1974年 | 40篇 |
1973年 | 45篇 |
1972年 | 35篇 |
排序方式: 共有6854条查询结果,搜索用时 0 毫秒
161.
Neighborhood Stress and Life Satisfaction: Is there a Relationship for African American Adolescents?
Valois Robert F. Kerr Jelani C. Carey Michael P. Brown Larry K. Romer Daniel DiClemente Ralph J. Vanable Peter A. 《Applied research in quality of life》2020,15(1):273-296
Applied Research in Quality of Life - This study identified associations between perceived neighborhood stress and adolescents’ perceptions of life satisfaction. African American adolescents... 相似文献
162.
163.
164.
165.
166.
167.
168.
Richard W. Thoreson Peter Shaughnessy Stephen W. Cook Dwight Moore 《Journal of counseling and development : JCD》1993,71(3):337-342
In this study the authors investigated the relationship between the Male Role Norm Scales (MRNS; Thompson & Pleck, 1987) and gender-related attitudes and behaviors in a sample of 367 male counselors drawn from American Counseling Association (ACA), formerly the American Association for Counseling and Development (AACD), members. Results indicated that this group of men did not, in general, endorse traditional male roles as measured by the MRNS. When a degree of affiliation with these roles was found, however, it was predictive of violence proneness, intimacy style, and degree of perceived similarity to father. Implications for training and counseling are discussed. 相似文献
169.
Peter Steinglass 《Family process》1994,33(2):109-110
170.
Peter Assmann Will Ballard Laurie Bornstein Dwayne Paschall 《Behavior research methods》1994,26(4):431-436
In this report we describe a graphical interface for generating voiced speech using a frequency-domain implementation of the Klatt (1980) cascade formant synthesizer. The input to the synthesizer is a set of parameter vectors, calledtracks, which specify the overall amplitude, fundamental frequency, formant frequencies, and formant bandwidths at specified time intervals. Tracks are drawn with the aid of a computer mouse that can be used either inpoint-draw mode, which selects a parameter value for a single time frame, or inline-draw mode, which uses piecewise linear interpolation to connect two user-selected endpoints. Three versions of the program are described: (1) SYNTH draws tracks on an empty time-frequency grid, (2) SPECSYNTH creates a spectrogram of a recorded signal upon which tracks can be superimposed, and (3) SWSYNTH is similar to SPECSYNTH, except that it generatessine-wave speech (Remez, Rubin, Pisoni, & Carrell, 1981) using a set of time-varying sinusoids rather than cascaded formants. The program is written for MATLAB, an interactive computing environment for matrix computation. Track-Draw provides a useful tool for investigating the perceptually salient properties of voiced speech and other sounds. 相似文献