全文获取类型
收费全文 | 502篇 |
免费 | 16篇 |
专业分类
各国政治 | 23篇 |
工人农民 | 42篇 |
世界政治 | 36篇 |
外交国际关系 | 30篇 |
法律 | 247篇 |
中国政治 | 8篇 |
政治理论 | 129篇 |
综合类 | 3篇 |
出版年
2023年 | 5篇 |
2022年 | 4篇 |
2020年 | 7篇 |
2019年 | 5篇 |
2018年 | 16篇 |
2017年 | 13篇 |
2016年 | 10篇 |
2015年 | 13篇 |
2014年 | 7篇 |
2013年 | 69篇 |
2012年 | 10篇 |
2011年 | 15篇 |
2010年 | 16篇 |
2009年 | 12篇 |
2008年 | 24篇 |
2007年 | 14篇 |
2006年 | 13篇 |
2005年 | 18篇 |
2004年 | 8篇 |
2003年 | 14篇 |
2002年 | 15篇 |
2001年 | 12篇 |
2000年 | 15篇 |
1999年 | 10篇 |
1998年 | 14篇 |
1997年 | 12篇 |
1996年 | 6篇 |
1995年 | 6篇 |
1994年 | 4篇 |
1993年 | 8篇 |
1992年 | 8篇 |
1991年 | 6篇 |
1990年 | 9篇 |
1989年 | 5篇 |
1988年 | 5篇 |
1987年 | 7篇 |
1986年 | 8篇 |
1985年 | 11篇 |
1983年 | 4篇 |
1982年 | 9篇 |
1981年 | 6篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1976年 | 5篇 |
1975年 | 3篇 |
1973年 | 4篇 |
1971年 | 4篇 |
1970年 | 3篇 |
1968年 | 3篇 |
排序方式: 共有518条查询结果,搜索用时 15 毫秒
91.
Schilthuizen M Scholte C van Wijk RE Dommershuijzen J van der Horst D Zu Schlochtern MM Lievers R Groenenberg DS 《Forensic science international》2011,207(1-3):91-95
Although many cases of fatal hydrogen sulfide poisoning have been reported, in most of these cases, it resulted from the accidental inhalation of hydrogen sulfide gas. In recent years, we experienced 17 autopsy cases of fatal hydrogen sulfide poisoning due to the inhalation of intentionally generated hydrogen sulfide gas. In this study, the concentrations of sulfide and thiosulfate in blood, urine, cerebrospinal fluid and pleural effusion were examined using GC/MS. The sulfide concentrations were blood: 0.11-31.84, urine: 0.01-1.28, cerebrospinal fluid: 0.02-1.59 and pleural effusion: 2.00-8.59 (μg/ml), while the thiosulfate concentrations were blood: 0-0.648, urine: 0-2.669, cerebrospinal fluid: 0.004-0.314 and pleural effusion: 0.019-0.140 (μmol/ml). In previous reports, the blood concentration of thiosulfate was said to be higher than that of sulfide in hydrogen sulfide poisoning cases, although the latter was higher than the former in 8 of the 14 cases examined in this study. These results are believed to be strongly influenced by the atmospheric concentration of hydrogen sulfide the victims were exposed to and the time interval between exposure and death. 相似文献
92.
Kelsey Michael Bradshaw Brad Donohue Chad Cross Jessica Urgelles Daniel N. Allen 《Journal of family violence》2011,26(7):545-549
Parental dissatisfaction with children appears to be associated with child maltreatment. However, little is known regarding the specific domains of parental dissatisfaction that may increase child maltreatment potential, particularly in perpetrators of child maltreatment where substance abuse is present. In this study, responses to the Child Abuse Potential Inventory (CAPI) and a scale measuring parental satisfaction in 11 domains were examined in a sample of 82 mothers who were referred for treatment of substance abuse and child neglect by the local child protective service agency. Results indicated that mothers were relatively most satisfied with their children overall, and least satisfied in domains that were relevant to discipline (i.e., following house rules, compliance, reaction to redirection and punishment, completion of chores). Five of the 11 areas of parental satisfaction that were assessed evidenced negative correlations with child abuse potential, indicating that as satisfaction increased, abuse potential decreased. However, when correlation analyses excluded participants with elevated CAPI Lie scale scores (a measure of social desirability), only overall happiness demonstrated a significant negative correlation with child abuse potential. These results suggest that while associations are present among measures of parental satisfaction and child abuse potential, these associations are moderated to some extent by social desirability, which may help explain some of the inconsistencies reported in prior studies of parental satisfaction and child maltreatment potential. 相似文献
93.
The Word Memory Test (WMT) is an established symptom validity test that relies on verbal memory performance to make inferences about “effort.” Previous studies, using a functional MRI (fMRI) adaptation of the WMT with healthy controls, have shown that successful completion of the WMT relies on a widespread network of neural systems associated with high cognitive effort. Additional studies using the same fMRI paradigm with patients with severe traumatic brain injury (TBI) suggest that increased activation of cortical regions associated with cognitive load are recruited to meet the cognitive challenges that the WMT places on a compromised neural system. This study builds on previous findings as a result of highly uncommon circumstances in which fMRI data on the WMT task were made available from the very same individual both 1 year before and 1 year after sustaining a TBI. Interestingly, the effect of TBI did not appear to impair performance on the WMT in terms of standard accuracy measurements, though response times were notably slower. The main fMRI finding was a significantly stronger and more widespread pattern of activation post-injury, particularly in the frontal and parietal brain regions, suggesting that stronger engagement of these networks was necessary to sustain accurate WMT performance compared to pre-injury testing. This unique source of data, together with previous findings, suggests a more complex relationship between effort and performance levels on the WMT than what is commonly assumed. 相似文献
94.
95.
The analysis of motor oils has wide applications in the forensic science field from comparing lubricants transferred between an automobile and a victim or crime scene to differentiating the compositions of plastic explosives. In this study, 40 unused motor oils were analyzed and compared by high-temperature gas chromatography-mass spectrometry to determine the potential for oil individualization. Oil samples were also collected from the crankcase dipsticks of 30 cars. Twenty-six of these oils could be differentiated from each other based on visual comparisons of the unresolved envelope (baseline rise due to incomplete separation) and the resolved hydrocarbons in the raw total ion chromatograms (TICs) and smoothed TIC data. Four of these oils were analyzed as unknowns and were correctly related to the corresponding vehicle. The use of extracted ion profiles (EIPs) was explored as a means to further discriminate between the indistinct samples based on the polycyclic aromatic hydrocarbon (PAH) content. The research discussed in this paper demonstrated that differentiation of motor oils was possible by examining the TIC, smoothed TIC, and EIP data. 相似文献
96.
Leana Allen Bouffard 《Journal of criminal justice》2010,38(5):870
Purpose
Sexual aggression on college campuses has received a great deal of research attention. Little criminological theory, however, has systematically linked individual-level risk factors for sexual aggression with broader societal factors like patriarchy. DeKeseredy and Schwartz (1993) proposed that societal patriarchy is translated into individual attitudes of male sexual proprietariness and entitlement, which provide motivation and justifications for sexual violence.Methods
This study explored the concept of entitlement through various measures and demonstrated the utility of the concept by linking it with other theoretically-relevant variables, including self-control, sexual partners, use of pornography, adversarial sexual beliefs, and rape myth adherence.Results
Entitlement was significantly correlated with theoretically-relevant variables in the expected directions. Additionally, entitlement was able to distinguish sexually aggressive and nonaggressive men. Multivariate models provided support for the theoretical assertion that entitlement fosters rape-supportive attitudes and behaviors, which in turn was related to sexual aggression.Conclusions
Entitlement is an important concept in understanding sexual aggression, and the causal relationships implied by theory should be explored further in future research. Implications and directions for future research and theory are discussed. 相似文献97.
Although child neglect and substance abuse co-occur in greater than 60% of child protective service cases, intervention outcome
studies are deplorably lacking. Therefore, a home-based Family Behavior Therapy is described in the treatment of a woman evidencing
child neglect, substance dependence, domestic violence and other co-occurring problems. Treatment included contingency management,
self control, stimulus control, communication and child management skills training exercises, and financial management components.
Results indicated improvements in child abuse potential, home hazards, domestic violence, and drug use, which were substantiated
by objective urinalysis testing, and tours of her home. Validity checks indicated the participant was being truthful in her
responses to standardized questionnaires, and assessors were “blind” to study intent. Limitations (i.e., lack of experimental
control and follow-up data collection) of this case example are discussed in light of these results. 相似文献
98.
This paper explores the characteristics of local drugs markets through the examination of a single London borough case study.
The picture that emerges in a borough not known for having a ‘drugs problem’ is of an entrenched, thriving and widespread
drugs economy. Crucially, it is embedded within the local communities. Most worryingly, crack cocaine is being dealt in 15
out of 16 wards, with the front-line dealing predominantly carried out by youths as young as 15. Indeed, there are signs that
the market has reached saturation point, while law enforcement merely scratches the surface. These findings reinforce the
view that studies of organised crime must be sensitive to the local impacts of global markets, and that public policy debates
about the responses to illegal drugs markets must be renewed and refreshed. 相似文献
99.
Sarah Allen Gershon 《政治交往》2013,30(2):160-183
The news media plays a key role in American democracy, often serving as the primary means by which voters learn about their elected representatives. However, the news media varies in its coverage of representatives, presenting voters with more frequent and favorable information about some House members than others, which may in turn influence voters' decisions at the polls. Although many scholars have examined the determinants of congressional news coverage, few have focused on the role of the actors who perhaps exert the most direct effect on such coverage: congressional press secretaries, journalists, and editors. In this study, I explore the influence of these actors on the tone and frequency of local congressional news coverage. I rely on data from two sources: (a) a content analysis of newspaper coverage of 100 representatives during the month prior to the 2006 election and (b) in-depth interviews with 51 congressional press secretaries and 22 journalists. These sets of data illustrate the important roles of both newspaper staff and congressional press secretaries in shaping the coverage House members receive. I conclude by discussing the implications of the findings for U.S. representatives and their constituents. 相似文献
100.
Shannon M. Carey Theresa Herrera Allen Tamara Perkins Mark S. Waller 《Juvenile & family court journal》2013,64(4):1-20
Although juvenile drug courts (JDCs) have now been in operation for 17 years, there is still no definitive appraisal as to this model's cost effectiveness and in particular, no detailed cost analysis of a JDC program following the 16 strategies until this one. The cost data presented in this paper build on the process and outcome evaluations performed on the Clackamas County Juvenile Drug Court (CCJDC). The criminal justice costs incurred by participants in drug court are compared with the costs incurred by eligible non‐participants. CCJDC participants had far more positive outcomes than those who did not participate in the program. In the two years after drug court entry, CCJDC participants cost the taxpayers $961 less per participant than similar individuals who did not attend the drug court program. 相似文献