全文获取类型
收费全文 | 1291篇 |
免费 | 77篇 |
专业分类
各国政治 | 110篇 |
工人农民 | 86篇 |
世界政治 | 131篇 |
外交国际关系 | 71篇 |
法律 | 719篇 |
中国政治 | 2篇 |
政治理论 | 246篇 |
综合类 | 3篇 |
出版年
2023年 | 13篇 |
2022年 | 12篇 |
2021年 | 24篇 |
2020年 | 40篇 |
2019年 | 41篇 |
2018年 | 66篇 |
2017年 | 88篇 |
2016年 | 86篇 |
2015年 | 49篇 |
2014年 | 65篇 |
2013年 | 179篇 |
2012年 | 58篇 |
2011年 | 42篇 |
2010年 | 25篇 |
2009年 | 33篇 |
2008年 | 42篇 |
2007年 | 52篇 |
2006年 | 43篇 |
2005年 | 41篇 |
2004年 | 45篇 |
2003年 | 38篇 |
2002年 | 37篇 |
2001年 | 44篇 |
2000年 | 21篇 |
1999年 | 19篇 |
1998年 | 11篇 |
1997年 | 17篇 |
1996年 | 8篇 |
1995年 | 6篇 |
1994年 | 3篇 |
1993年 | 5篇 |
1992年 | 8篇 |
1991年 | 6篇 |
1990年 | 8篇 |
1989年 | 9篇 |
1988年 | 7篇 |
1987年 | 7篇 |
1985年 | 4篇 |
1984年 | 4篇 |
1983年 | 4篇 |
1982年 | 6篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1974年 | 3篇 |
1973年 | 7篇 |
1972年 | 6篇 |
1971年 | 11篇 |
1968年 | 3篇 |
1966年 | 3篇 |
1965年 | 2篇 |
排序方式: 共有1368条查询结果,搜索用时 109 毫秒
981.
There is increasing interest in the issue of informal payments for health care in low- and middle-income countries. Emerging evidence suggests that the phenomenon is both diverse, including many variants from cash payments to in-kind contributions and from gift giving to informal charging, and widespread, reported from countries in at least three continents. However, cross-national research is hampered by the lack of consensus among researchers on the definition of informal payments, and the definitions that have been proposed are unable to incorporate all forms of the phenomenon that have been described so far. This article aims to overcome this limitation by proposing a new definition based on the concept of entitlement for services. First, the various forms of informal payment observed in practice are reviewed briefly. Then, some of the proposed definitions are discussed, pointing out that none of the distinctive characteristics implied by these definitions, including illegality, informality, and corruption, is adequate to capture all varieties of the phenomenon. Next, an alternative definition is formulated, which identifies the distinctive feature common to all forms of informal payments as something that is contributed in addition to the terms of entitlement. Then, the boundaries implied by this definition are explored and, finally, the implications for research and policy making are discussed with reference to the lessons developed countries can learn from the experiences of transitional countries. 相似文献
982.
Fifty six cases of a forensic population were submitted to a cluster analysis to observe the aglomerative behavior in relation to the total scores of the items comprising the PCL-R Psychopathy Checklist Revised [R.D. Hare, Manual for the Hare Psychopathy Checklist-Revised, Multi-Health System, Toronto, 1991]. The analysis indicated two independent types of antisocial personality disorders, not identified in the PCL-R in its standardized form, one of them being strongly associated with criminal conduct and the other with psychopathic personality. Such clusters were stable when the analysis was replicated with other hierarchical algorithms, and also, they were independently extracted via the k-means method without having previously fixed the value for k. One of the clusters concentrated the PCL-R highest scores, indicating that it is the prototypical psychopathic character determinant. 相似文献
983.
Crespillo M Paredes MR Prieto L Montesino M Salas A Albarran C Alvarez-Iglesias V Amorin A Berniell-Lee G Brehm A Carril JC Corach D Cuevas N Di Lonardo AM Doutremepuich C Espinheira RM Espinoza M Gómez F González A Hernández A Hidalgo M Jimenez M Leite FP López AM López-Soto M Lorente JA Pagano S Palacio AM Pestano JJ Pinheiro MF Raimondi E Ramón MM Tovar F Vidal-Rioja L Vide MC Whittle MR Yunis JJ Garcia-Hirschfel J 《Forensic science international》2006,160(2-3):157-167
We report here a review of the seventh mitochondrial DNA (mtDNA) exercise undertaken by the Spanish and Portuguese working group (GEP) of the International Society for Forensic Genetics (ISFG) corresponding to the period 2003-2004. Five reference bloodstains from five donors (M1-M5), a mixed stain of saliva and semen (M6), and a hair sample (M7) were submitted to each participating laboratory for nuclear DNA (nDNA; autosomal STR and Y-STR) and mtDNA analysis. Laboratories were asked to investigate the contributors of samples M6 and M7 among the reference donors (M1-M5). A total of 34 laboratories reported total or partial mtDNA sequence data from both, the reference bloodstains (M1-M5) and the hair sample (M7) concluding a match between mtDNA profiles of M5 and M7. Autosomal STR and Y-STR profiling was the preferred strategy to investigate the contributors of the semen/saliva mixture (M6). Nuclear DNA profiles were consistent with a mixture of saliva from the donor (female) of M4 and semen from donor M5, being the semen (XY) profile the dominant component of the mixture. Strikingly, and in contradiction to the nuclear DNA analysis, mtDNA sequencing results yield a more simple result: only the saliva contribution (M4) was detected, either after preferential lysis or after complete DNA digestion. Some labs provided with several explanations for this finding and carried out additional experiments to explain this apparent contradictory result. The results pointed to the existence of different relative amounts of nuclear and mtDNAs in saliva and semen. We conclude that this circumstance could strongly influence the interpretation of the mtDNA evidence in unbalanced mixtures and in consequence lead to false exclusions. During the GEP-ISFG annual conference a validation study was planned to progress in the interpretation of mtDNA from different mixtures. 相似文献
984.
De Paúl J Asla N Pérez-Albéniz A de Cádiz BT 《Journal of interpersonal violence》2006,21(8):1018-1045
The objective is to know if high-risk mothers for child physical abuse differ in their evaluations, attributions, negative affect, disciplinary choices for children's behavior, and expectations of compliance. The effect of a stressor and the introduction of mitigating information are analyzed. Forty-seven high-risk and 48 matched low-risk mothers participated in the study. Mothers' information processing and disciplinary choices were examined using six vignettes depicting a child engaging in different transgressions. A four-factor design with repeated measures on the last two factors was used. High-risk mothers reported more hostile intent, global and internal attributions, more use of power assertion discipline, and less induction. A risk group by child transgression interaction and a risk group by mitigating information interaction were found. Results support the social information-processing model of child physical abuse, which suggests that high-risk mothers process child-related information differently and use more power assertive and less inductive disciplinary techniques. 相似文献
985.
- Given that knowledge and information are critical resources for acquiring access to the EU policy process, the question of this paper is how firms should manage the knowledge and information strategies surrounding their lobbying attempts. Developing an appropriate resource base is critical for firms trying to bring their interests to bear on European decision‐making. The same holds for the ability to recognize potential points of entry to the EU policy process. Next to substantial knowledge and expertise, therefore, the ability to understand policy dynamics and the appropriate timing of lobbying attempts are critically important in corporate lobbying in Europe. The implication of this argument is that managing knowledge and information strategies become increasingly important for handlings firms' public affairs.
986.
Gangitano DA Garófalo MG Juvenal GJ Budowle B Padula RA 《Journal of forensic sciences》2002,47(1):175-177
DNA extracted from the fingernails of female victims of a violent or aggressive act may assist in the identification of the male. Sometimes with the current autosomal STR loci, however, the victim's profile may mask the perpetrator's DNA profile or the perpetrator's DNA may be substantially lower in quantity than that of the victim's DNA. Thus, under these conditions, no characterization is possible. In this paper, an alternative DNA extraction procedure was employed, and the application of an STR locus residing on the Y chromosome DYS19 was typed to allow for genetic characterization of the perpetrator in such cases. 相似文献
987.
988.
Fernandes AT Brehm A Alves C Gusmão L Amorim A 《Forensic science international》2002,125(2-3):281-283
Allele and haplotype frequencies of 17 chromosome STR loci, 15 of them included in the kit PowerPlex 16 System from Promega, were determined in a sample of unrelated males from Madeira and Porto Santo Islands. PowerPlex 16 includes STRs not studied before in the Madeira population. The-kit includes two new allele markers (Penta D and Penta E), which proved to be extremely useful for paternity testing (PD = 0.952 and 0.977, respectively). The study revealed that the Madeira population does not differ from that of the north Portugal. Nevertheless, some loci presented alleles found in sub-Saharan and North European populations which were not reported so far in Portugal. 相似文献
989.
Vasovagal syncope (VVS) is one of the most common causes of complete or partial loss of consciousness, thus it might cause harm to the patients themselves or innocent bystanders while driving a car. In our case report we introduce the case of a 60-year-old man who was admitted to hospital after a serious motor vehicle accident due to loss of consciousness. We demonstrate the process and results of complete cardiologic and neurological assessment. Our case report illustrates the importance of recognition of patients with a high risk for incapacitating symptoms due to VVS, and the use of head-up tilt-table tests to determine the diagnosis and to guide therapy with beta-blocking agents. As transient loss of consciousness during driving may cause potentially fatal accident, it has to be taken into consideration during decision making for issue of driving licenses to patients with VVS. 相似文献
990.
Alvarez S Soledad Mesa M López AM de las Heras J de Lago E López MT Rubio JM Arroyo-Pardo E 《Forensic science international》2002,127(1-2):142-144
Allele and haplotype frequencies for nine Y-specific STR loci (DYS19, DYS389-I, DYS389-II, DYS390, DYS391, DYS393, DYS434, DYS437, and DYS439) were obtained from a sample of 57 males from Guinea Equatorial. 相似文献