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   3862篇
  免费   387篇
  国内免费   178篇
  2024年   18篇
  2023年   146篇
  2022年   68篇
  2021年   106篇
  2020年   213篇
  2019年   213篇
  2018年   231篇
  2017年   236篇
  2016年   227篇
  2015年   133篇
  2014年   125篇
  2013年   806篇
  2012年   93篇
  2011年   83篇
  2010年   80篇
  2009年   102篇
  2008年   146篇
  2007年   169篇
  2006年   181篇
  2005年   157篇
  2004年   118篇
  2003年   101篇
  2002年   89篇
  2001年   92篇
  2000年   75篇
  1999年   56篇
  1998年   37篇
  1997年   53篇
  1996年   66篇
  1995年   43篇
  1994年   34篇
  1993年   18篇
  1992年   17篇
  1991年   14篇
  1990年   5篇
  1989年   3篇
  1988年   6篇
  1987年   1篇
  1986年   3篇
  1985年   9篇
  1984年   7篇
  1983年   5篇
  1982年   7篇
  1981年   7篇
  1980年   4篇
  1979年   4篇
  1978年   6篇
  1977年   7篇
  1976年   4篇
  1975年   3篇
排序方式: 共有4427条查询结果,搜索用时 15 毫秒
231.
Ethnic identity is defined in terms of the interaction between exploration of and commitment to a given cultural background. The present study investigated the effect of individual background, role transitions, and the social environment on the development of ethnic identity in a sample of German adults aged 21–73 years (N = 2,940). Additionally, identity transitions and the moderating effect of disequilibrating life events on identity over time were examined (N = 827). Overall, results are consistent with findings for other identity domains: Respondents could be assigned to one of four identity stages, ranging from unexamined to achieved identity. Particularly, the individual background and the extent of community involvement affected ethnic identity formation in adulthood. Longitudinal analyses revealed that only one-third of respondents had remained in the same identity stage; most individuals had transitioned forward or backward. Changes in ethnic identity were not moderated by disequilibrating life events.  相似文献   
232.
研究以心理健康双因素模型为视角,运用元分析技术梳理了留守儿童歧视知觉与积极和消极心理健康的关系,并探究了影响其关系的调节变量。通过文献检索与筛选,共27篇中英文文献,56个独立样本纳入元分析,包含被试17146名。结果显示,歧视知觉与积极心理健康指标呈显著的负相关关系(r=-0.298),与消极心理健康指标呈显著的正相关关系(r=0.365)。调节效应分析发现,留守儿童歧视知觉与积极心理健康的关系受到歧视知觉测量工具的影响,与消极心理健康的关系受到歧视知觉测量工具、学龄段以及消极结果类型的影响。同时,元回归分析发现,文献年份对歧视知觉与积极心理健康指标关系的调节效应显著; 性别对歧视知觉与积极和消极心理健康关系的调节作用均不显著。研究结果进一步明确了留守儿童歧视知觉与积极和消极心理健康的关系,为探索提升留守儿童心理社会适应的新路径提供了借鉴。  相似文献   
233.
IntroductionSo far, no qualitative content analysis (QCA) has analysed pilots’ experiences and perceptions regarding weaknesses of fatigue risk management (FRM), flight time limitations (FTL), rosters, fatigue-severity, sleep problems, and how they relate to pilots’ mental health and well-being.ObjectiveThis research analyses pilots’ described perceptions of stress, fatigue, aviation safety and how regulations like FTL can affect their health and well-being.MethodIn total, 119 international pilots described their perceptions of FTL, rosters, aviation safety, and how they relate to fatigue and health. The QCA was conducted to analyse interactions of working conditions, stressors, fatigue, sleep problems and mental health of EASA-based and Australian pilots.ResultsAlthough pilots were rostered for only 60.8% to 62.5% of the legally allowed duty and flight hours/month, 78.6% reported severe or very high fatigue, 22.8% significant depression, 12.3% significant anxiety symptoms, 10.5% reported significant depression and anxiety symptoms. Pilots uttered severe concerns about FTL, sleep restrictions associated with early starts, minimum rest, etc. Pilots also expressed distinct fears regarding more fatigue-related crashes, and how adverse working conditions, work-related and psychosocial stress could impair their health.ConclusionsThis QCA provided valuable insights into interactions of working conditions, fatigue, sleep restrictions, physical and mental health. Progressive health impairment due to lack of sleep and accumulated fatigue promote burnout, mental and physical health problems, which not only threaten flight safety, but also sustainability of aviation.  相似文献   
234.
为探讨城镇化进程中离乡农民的心理健康特点以及心理素质、相对剥夺感对其的影响,通过量表对1339名城乡居民进行调查。结果发现:离乡与留乡农民在幸福感、拥有生命意义感、感知控制感、心理素质方面显著低于城镇居民,在状态焦虑方面显著高于城镇居民; 离乡农民在抑郁上显著高于城镇居民,在感知控制感上显著高于留乡农民,在心理素质上显著低于留乡农民; 留乡农民在相对剥夺感上显著高于城镇居民; 离乡农民的幸福感、拥有生命意义感、感知控制感态与相对剥夺感呈显著负相关,与心理素质呈显著正相关; 离乡农民的抑郁、状态焦虑与相对剥夺感呈显著正相关,与心理素质呈显著负相关; 离乡农民的相对剥夺感与心理素质之间呈显著负相关。心理素质除了可以直接预测心理健康各项指标,还可以通过相对剥夺感的中介作用,间接预测幸福感、抑郁及状态焦虑。提升心理素质和降低相对剥夺感是离乡农民心理健康服务的重要切入点。  相似文献   
235.
236.
The papers in this special series make a compelling case for the value of digital mental health services (DMHS; including technology-based interventions, assessments, and prevention programs) to help address some of the currently unmet needs in mental health care. At the same time, the papers highlight the work that needs to be accomplished for DMHS to fulfill their promise. We review the papers’ contributions in terms of (a) the imperative to increase access to evidence-informed, high-quality care, especially for underserved populations, both in the United States and globally; (b) ways to use DMHS to improve the ways that clinical care is provided to make treatment provision more effective and efficient; and (c) the current state of the research on DMHS for emotional disorders. We then consider lessons learned and recommendations to move the field forward, such as increasing (and making transparent) the research base on DMHS, adopting regulatory standards for DMHS, attending carefully to training issues for DMHS and best practices for dissemination and implementation, designing specifically for digital platforms, and being intentional about efforts to reduce disparities regarding who benefits from DMHS.  相似文献   
237.
Anxiety disorders are the most common mental health conditions in children, with approximately 13% of kids struggling with excessive anxiety. The vast majority do not have access to effective treatments and there continues to be a disjunction between treatments that are empirically supported and those that are available in the community. Digital mental health interventions (DMHI) can increase efficiency, reach, and standardization as well as reduce costs of providing of mental health care. Here we review the extant research on DMHI, including web- or cloud-based programs, mobile applications (apps), virtual reality (VR), and digital assessment methods such as ecological momentary assessment (EMA) for the delivery and/or support of evidence-based care in child anxiety. Preliminary research is promising for these tools to improve access and efficiency of evidence-based practice. However, ethics and practice guidelines are needed and questions remain regarding what level and quality of therapeutic involvement is needed to maximize treatment completion and outcomes in youth and whether DMHIs are contraindicated for certain populations or whether they are similarly effective with those with comorbid conditions is unclear.  相似文献   
238.
Youths who make suicide attempts or engage in repetitive self-harm are at risk for future suicide attempts and death by suicide or self-harm. This treatment development report focuses on the Safe Alternatives for Teens and Youth (SAFETY) treatment. SAFETY is a 12-week outpatient child and family-centered cognitive-behavioral treatment, informed by dialectical-behavior therapy, and designed to promote safety following a suicide attempt or repeated episodes of self-harm. Previous reports have described results of small open and randomized treatment development trials. Here, we describe our “incubator” treatment development model. Combining scientific rigor with attention to the community context in which treatment is delivered, the incubator model emphasizes laboratory-based treatment development trials and quantitative and qualitative data generated through partnerships with community treatment sites and youth and parent consumers of care. Aims of this approach are to: (1) integrate information from our partners throughout the treatment development process; (2) create a more feasible and easily transportable “youth” and “family” centered treatment; and (3) accelerate the pace with which laboratory-based treatment advances can be incorporated into improvements in community care. We describe our incubator treatment development model and how data generated through our treatment development process and interactions between the laboratory and community teams contributed to the development of the SAFETY treatment.  相似文献   
239.
This study aimed to identify the key factors associated with Australian parents' willingness to use a rideshare vehicle to transport their unaccompanied child(ren). Six hundred and thirty-one participants completed an online survey (M = 39.2 years, SD = 10.5, Range = 18.0–70.0 years; Female: 63.4%). Most participants (62.1%) reported that they would 'never' use a rideshare vehicle to transport their unaccompanied child(ren). The results of a logistic regression model showed that participants': previous use of a rideshare vehicle with their child, annual mileage, propensity for technology adoption, aberrant driving behaviours, as well their requirements for vehicle features were significantly associated with their willingness to use a rideshare vehicle to transport their unaccompanied child, χ2(7) = 159.59, p < 0.001. Overall, the findings suggest that Australian parents are mostly ‘unwilling’ to use a rideshare vehicle to transport their unaccompanied children. Understanding the views of parents towards emerging transportation modes for their children is crucial for urban planning, traffic engineering, economic and social mobility and ultimately, on supporting safe modes of transportation.  相似文献   
240.
The concept of the shared values of humanity, embodying the spirit of putting people first and solving real-life problems, is of great significance for constructing a new global order and building a human community with a shared future. The shared values of humanity respect the differences in understanding and realization paths of different civilizations, and seek common grounds with an inclusive and open attitude. The core socialist values are an embodiment and an extension of the shared values of humanity. The fine traditional Chinese culture has also laid a profound cultural basis for the pursuit of the shared values of humanity, enabling us to make up a better scheme for building a human community with a shared future from the perspective of civilization.  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