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   830篇
  免费   50篇
各国政治   77篇
工人农民   93篇
世界政治   73篇
外交国际关系   43篇
法律   350篇
中国政治   13篇
政治理论   206篇
综合类   25篇
  2023年   4篇
  2022年   5篇
  2021年   10篇
  2020年   12篇
  2019年   32篇
  2018年   24篇
  2017年   32篇
  2016年   25篇
  2015年   32篇
  2014年   28篇
  2013年   145篇
  2012年   27篇
  2011年   27篇
  2010年   20篇
  2009年   33篇
  2008年   38篇
  2007年   31篇
  2006年   25篇
  2005年   31篇
  2004年   19篇
  2003年   20篇
  2002年   24篇
  2001年   19篇
  2000年   13篇
  1999年   18篇
  1998年   14篇
  1997年   16篇
  1996年   7篇
  1995年   7篇
  1994年   10篇
  1993年   8篇
  1992年   10篇
  1991年   8篇
  1990年   4篇
  1989年   12篇
  1988年   8篇
  1987年   8篇
  1986年   12篇
  1985年   3篇
  1984年   9篇
  1983年   9篇
  1982年   6篇
  1981年   4篇
  1980年   7篇
  1979年   4篇
  1977年   3篇
  1976年   3篇
  1974年   3篇
  1971年   2篇
  1970年   3篇
排序方式: 共有880条查询结果,搜索用时 15 毫秒
51.
Emotional and behavioral correlates of Type A behavior in children and adolescents were examined in 184 fifth-, seventh-, and ninth-grade students, classified as high or low Type A, using self-report, teacher ratings (fifth grade only), and structured interview procedures. Measures included the Hunter-Wolf A-B Rating Scale, Behavioral Symptoms of Stress Inventory, Dimensions of Temperament Survey, Desire for Control Scale, Eysenck Personality Inventory, and the Multiple Affect Adjective Checklist. High Type A children reported significantly more stressed-related behaviors, higher levels of depression, anger, anxiety, and cognitive disorganization, and greater reactivity than Low Type A. No differences were found on measures of temperament (activity level, attention span, adaptibility, and rhythmicity), desire for control, or introversion-extroversion. Females, in general, reported significantly more behavioral stress symptoms. However, no other gender differences were found. Possible reasons for reported differences between Type A children and adults are discussed, along with gender differences in behavioral symptoms. Need for multiple measures of Type A across situation is considered along with need for controlled longitudinal studies of Type A components and the influence of contexts.Received Ph.D. from Stanford. Research interests: Adolescent problems, stress.Received Ph.D. from Stanford. Research interests: Type A, anger/hostility; AIDS prevention.Received Ph.D. from Stanford. Research interests: child & family problems, stress disorders.Received Ph.D. from Stanford. Research interests: psychoneuroimmunology.Received Ph.D. from Stanford. Research interests: pain disorders, stress.Received Ph.D. from Stanford.Received Ph.D. from Stanford. Research interests: anxiety and phobic disorders.  相似文献   
52.
The first part of this two-part article argues that significant changes in both the capacity and the content of attention emerge in adolescence. Part I reviews evidence from behavioral and biological studies that the capacity for interested attention develops from late childhood into adolescence.  相似文献   
53.
Public attitudes toward mental health present an interesting puzzle. While mental health is one aspect of general health and well-being, it receives less support for government spending increases than does health care. One explanation lies with the stigma that is attached to mental illness. This stigma produces more negative attitudes on policy issues related to persons with mental illness such as government spending for mental health. However, group identification, as defined by personal experience or a family member who has experienced a mental illness, may have a strong effect on these attitudes. Using data from the 1996 General Social Survey's module on mental health. I examine this and other hypotheses and find evidence that group identification increases the likelihood of increased support for government spending for mental health. These robust findings exist even in quantitative models, which include politically relevant variables and measure identification with mental illness in two different ways. These findings suggest that mental health is policy for the few because those most supportive of government spending increases are persons who share the common identity of experiencing mental illness.  相似文献   
54.
55.
Germany's refusal to pursue active integration policies for three decades has unleashed surprising do-it-yourself-integration processes among migrant communities, as demonstrated by dramatic changes in the Turkish ethnic economy since 1990. This study embeds these developments in an analytical framework linking economic enclaves and urban citizenship. Initially motivated by structural unemployment and social exclusion, guestworkers and their offspring are turning to self-employment, not only adding new jobs to an otherwise moribund national economy but also promoting urban revitalization in cities like Berlin, Frankfurt and Cologne. The study outlines generational differences within the Turkish-German community, ascertaining that third-generation ethnics are more likely to start businesses outside the food sector and more willing to embrace FRG citizenship. It describes the size and scope of ethnic enterprises across Germany, followed by a treatment of women entrepreneurs in Berlin. Ethnic associations indirectly foster “participatory” consciousness among males, but women tend to identify directly with the society that offers opportunities not available to them in the purported Turkish homeland. Instead of producing “parallel societies” (as German politicians often insist), ethnic businesses and local community involvement are crucial in bridging majority and minority cultures, on the one hand, and in granting Turkish entrepreneurs top-level access to state policy-makers—even without the formal rights of citizenship.  相似文献   
56.
Since 1990, the German government has been demanding from the civil servants of the former East Germany a new adaptability and creativity that was never promoted in the GDR bureaucracy. The article analyses the change of ethics in the former East Germany after 1990. It looks at the development of the German civil service, discusses the economic disparity between East and West, and examines the ethical tradition in the former socialist country. It uses the case of the selection in 2001 of the city of Leipzig by BMW as the location of a new manufacturing plant as an illustration of the new goal‐oriented activities of the present Eastern bureaucracy. More than 250 European cities were competing for the new plant, which will create over 10,000 jobs. The level of performance of the Leipzig bureaucracy in the BMW case reveals the new efficiency and professionalism of the former Eastern civil service. In addition to Leipzig, virtually all the local and state administrations from the former East Germany have developed a sense of the necessities of the time, including globalization. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
57.
This study used a cluster analytic approach to identify self-esteem trajectories among adolescents over a four-year period from sixth to tenth grades (N = 1,160). Four self-esteem trajectories were identified that replicated previous research: (1) consistently high, (2) moderate and rising, (3) steadily decreasing, and (4) consistently low. Female adolescents were more likely to be in the steadily decreasing self-esteem group while male adolescents were more likely to be in the moderate and rising group. African American and white youth were equally distributed across groups. Using repeated measures analysis, we found that youth with consistently high and moderate and rising self-esteem reported developmentally healthier outcomes in Grade 10 than youth in the other two clusters. Outcomes included susceptibility to peer pressure, school grades, and alcohol use. Implications of these results for studying self-esteem and developmental change more generally are discussed.  相似文献   
58.
A DNA microarray system for forensic SNP analysis   总被引:3,自引:0,他引:3  
Forensic DNA analysis is routinely performed using polymorphic short tandem repeat (STR) markers. However, for degraded or minute DNA samples, analysis of autosomal single nucleotide polymorphisms (SNPs) in short fragments might be more successful. Furthermore, sequencing of mitochondrial DNA (mtDNA) is often performed on highly degraded or scarce samples due to the high copy number of mtDNA in each cell. Due to the increasing number of complete mtDNA genome sequences available, the limited discrimination power of an mtDNA analysis, may be increased by analysis of coding region polymorphisms in addition to the non-coding variation. Since sequence analysis of the coding region would require more material than generally present in forensic samples, an alternative SNP analysis approach is required. We have developed a one-colour microarray-based SNP detection system for limited forensic materials. The method is based on minisequencing in solution prior to hybridisation to universal tag-arrays. In a first outline of a forensic chip, a combination of 12 nuclear and 21 mitochondrial SNP markers are analysed simultaneously. The mitochondrial markers on the chip are polymorphisms within the hypervariable region as well as in the coding region. Even though the number of markers in the current system is limited, it can easily be extended to yield a greater power of discrimination. When fully developed, microarray analysis provides a promising system for efficient sensitive SNP analysis of forensic samples in the future.  相似文献   
59.
60.
The Y-PLEX 12 system, developed for use in human identification, enables simultaneous amplification of eleven polymorphic short tandem repeat (STR) loci, namely DYS392, DYS390, DYS385 a/b, DYS393, DYS389I, DYS391, DYS389II, DYS 19, DYS439 and DYS438, residing on the Y chromosome and Amelogenin. Amelogenin provides results for gender identification and serves as internal control for PCR. The validation studies were performed according to the DNA Advisory Board's (DAB) Quality Assurance Standards. The minimal sensitivity of the Y-PLEX 12 system was 0.1 ng of male DNA. The mean stutter values ranged between 3.76-15.72%. A full male profile was observed in mixture samples containing 0.5 ng of male DNA and up to 400 ng of female DNA. Amelogenin did not adversely affect the amplification of Y-STRs in mixture samples containing male and female DNA. The primers for the Y-STR loci present in Y-PLEX 12 are specific for human DNA and some higher primates. None of the primate samples tested provided a complete profile at all 11 Y-STR loci amplified with the Y-PLEX 12 system. Y-PLEX 12 is a sensitive, valid, reliable, and robust multiplex system for forensic analysis, and it can be used in human forensic and male lineage identification cases.  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