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151.
Arndt J Bell S Crookshanks L Lovejoy M Oleska C Tulley T Wolfe D 《Forensic science international》2012,222(1-3):137-145
The organic components of gunshot residue (OGSR, also called firearms discharge residue (FDR) or cartridge discharge residue (CDR)) have been studied and discussed in the literature. These residues, consisting of particulates such as burned and unburned powder as well as molecular compounds, are rarely used in casework except for purposes such as shooting reconstructions. Molecular compounds that survive the firing event or that are created as a result of the firing event could, with focused research and development, open a new avenue for forensic gunshot residue analysis. In this study, the persistence of organic gunshot residue was evaluated using diphenylamine (DPA) as a target analyte and ion mobility spectrometry (IMS) as the detection system. Samples were collected from hands using a solvent swabbing technique and the swab was analyzed using direct thermal desorption for sample introduction into the IMS. OGSR was found to persist for at least 4h. Although DPA is a widely used industrial compound, analysis of numerous blank and background samples (n~100) did not show any significant response for DPA using this detector. Variations were noted among individuals and as such, the data set does not support estimation of a half-life as has been done for traditional primer residues. No secondary transfers were observed, suggesting the possibility of skin adhesion via interactions between the lipophilic organic compounds and skin lipids. IMS proved valuable as a means of generating patterns for forensic pattern matching and shows promise as a screening tool applied to firearms discharge. 相似文献
152.
Marco R. Rijnders Ph.D. Amalía Stamouli Ph.D. Annabel Bolck Ph.D. 《Journal of forensic sciences》2010,55(3):616-623
Abstract: Variations in gunshot residue (GSR) compositions are used in the reconstruction of shooting incidents. In this study, GSR samples taken from seven different locations around and in the firearm were collected and analyzed using scanning electron microscopy/energy dispersive X‐ray analysis. Four different types of ammunition were applied. Very low correlations were found when different ammunition were used. This clearly shows that it is possible to differentiate between ammunition types. When the same ammunition was used, high correlations were found between samples taken from external positions (such as hands of shooter, bullet‐entrance holes) but poor correlation was found between internal samples (such as firearm barrel, cartridge case) and external samples. A high degree of association was found between samples that simulated victim and shooter. These findings clearly demonstrate that GSR comparison studies are meaningful but care needs to be taken when choosing suitable exhibits. External samples (such as hands of shooter, bullet‐entrance holes) are more suitable candidates than internal samples (barrel of the firearm, cartridge case). 相似文献
153.
Romina Ciaffi B.Sc. Danilo De Angelis Ph.D. D.D.S. Pier Federico Gherardini B.Sc. Giovanni Arcudi M.D. Renato Nessi M.D. Gian Paolo Cornalba M.D. Marco Grandi M.D. Cristina Cattaneo Ph.D. M.D. 《Journal of forensic sciences》2010,55(2):478-481
Abstract: A critical review of Kahana and Hiss’ study on identification from bone trabecular pattern and a test of their method conducted on the humerus are presented. Bone trabecular pattern was studied through the generation of a numerical file representing the gray scale. Using the correlation coefficient, several pairwise comparisons between numerical files were performed. The test gave nearly 30% of incorrect exclusions (the method did not recognize couples of radiographs belonging to the same subject) and 50% of misidentifications (the method recognized couples of radiographs belonging to different subjects, as belonging to the same subject); therefore, this research shows that at the present time, it is not possible to safely quantify identification through bone density patterns, of the proximal humerus taken from thoracic X‐rays. Thus, an “easy”—but dangerous—use of trabecular density patterns on this specific type of radiogram as an identification method should be currently avoided. 相似文献
154.
The Issue of Age Estimation in a Modern Skeletal Population: Are Even the More Modern Current Aging Methods Satisfactory for the Elderly?, 下载免费PDF全文
Annalisa Cappella Ph.D. Marco Cummaudo M.Sc. Elena Arrigoni B.Sc. Federica Collini M.D. Cristina Cattaneo M.D. Ph.D. 《Journal of forensic sciences》2017,62(1):12-17
The main idea behind age assessment in adults is related to the analysis of the physiological degeneration of particular skeletal structures with age. The main issues with these procedures are due to the fact that they have not been tested on different modern populations and in different taphonomic contexts and that they tend to underestimate the age of older individuals. The purpose of this study was to test the applicability and the reliability of these methods on a contemporary population of skeletal remains of 145 elderly individuals of known sex and age. The results show that, due to taphonomic influences, some skeletal sites showed a lower survival. Therefore, the methods with the highest percentage of applicability were Lovejoy (89.6%) and Rougé‐Maillart (81.3%), followed by Suchey‐Brooks (59.3%), and those with the lowest percentage of applicability were Beauthier (26.2%) and Iscan (22.7%). In addition, this research has shown how for older adults the study of both acetabulum and auricular surface may be more reliable for aging. This is also in accordance with the fact that auricular surface and the acetabulum are the areas more frequently surviving taphonomic insult. 相似文献
155.
Entomotoxicology involves the analysis of the presence and the effects of toxicological substances in necrophagous insects. Results obtained by entomotoxicological studies may assist in the investigation of both the causes and the time of death of humans and animals. Ethylene glycol (EG) is easy to purchase, sweet and extremely toxic. It may be consumed accidentally or purposefully, in an attempt to cause death for suicidal or homicidal intent. Several cases report fatalities of humans and animals. The present study is the first to examine the effects of EG on the survival, developmental rate and morphology of two blowfly species, (Diptera: Calliphoridae) typically found on corpses and carcasses: Lucilia sericata (Meigen) and L. cuprina (Wiedemann). Both species were reared on substrates (beef liver) spiked with three different concentrations of EG that could cause death in either a human or cat: 1/2LD50 (T1), LD50 (T2), 2LD50 (T3), in addition to a control treatment (C) with no EG.Results of this research show that: a) both species are unable to survive if reared on a food substrate spiked with the highest concentration of EG (T3), while lower and medium concentrations (T1, T2) affect, but not prevent, the survival and the completion of the life cycle of such species; b) adults of L. sericata eclose only in C and T1, while adults of L. cuprina in both C, T1, T2; however, c) the developmental time of both species reared in T1 and T2 is statistically slower than the control; d) the body length of the immatures of both of the species reared in T1 and T2 is statistically smaller than the control. 相似文献
156.
Marco Walther 《Journal of Indian Philosophy》2018,46(2):373-398
This article aims to introduce some features of the literary output of Gling-ras-pa Padma rdo-rje, who was the teacher of the ‘Brug-pa bKa’-brgyud-pa school’s founder, gTsan-pa rGya-ras Ye-shes rdo-rje (1161–1211) in Tibet. The work that I draw upon here is titled A Torch of Crucial Points. A Condensation and Presentation of all Dharmas that are to be Practiced (gCes pa bsdus pa’i sgron ma ‘am| bslabs par bya ba’i chos thams cad mdor bsdus te bstan pa), a presentation of the entire outline of Buddhist practice that resembles the doctrinal stages (bstan rim) literary genre. Based on an edition and translation of the fifth chapter of the 17 that comprise the work, here I focus on several concepts, such as the three natures (trisvabhāva) and the allground consciousness (ālayavijñāna), that pertain to the system of Yogācāra and the terminology related to it. These are shown as they appear in the framework of the work, which is heavily influenced by the tradition of Mahāmudrā and the background of its author’s life as a wandering yogin in the lineage of Mi-la ras-pa (1040–1132). 相似文献
157.
158.
159.
Marco Balboni 《英联邦与比较政治学杂志》2019,57(2):193-207
ABSTRACTThe diffusion of the principle of subsidiarity across countries and regions has taken on a variety of forms. In the case of the EU and Australia the observed variation is most striking. The detailed comparison of the governance arrangements in a quasi-federal system with those of a fully established federation reveals a continuing divergence in the actual recognition of subsidiarity concerns. 相似文献
160.