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91.
亚当·斯密以“看不见的手”作为一种调节经济活动运行的方式,虽出于自利的动机,但结果却导致私利与公利的自然和谐,这对后继经济学者经济和谐理论的建构产生重大而深远的影响。  相似文献   
92.
山东半岛地区大学生手长足长与身高关系的研究   总被引:7,自引:1,他引:6  
对山东半岛地区1000名汉族大学生的手长、足长和身高进行活体测量。经统计学处理,求出由手长、足长与身高相互推算的回归方程式。相关系数为0.51~0.66,其中男性高于女性。由手长推算身高的回归方程式较由足长推算身高的回归方程式,有较高的相关系数和较低的标准估计误差。  相似文献   
93.
伴随着经济和社会的进步 ,公共行政的发展 ,势必对以国家行政为主要调整对象的传统行政法范式提出挑战 ,最终转变为以公共利益为中心的公共行政法范式。公共行政法范式给行政法理论研究带来了新的研究视角的转换  相似文献   
94.
在侵占罪中,非法占为已有含义的准确界定及其与拒不交出(退还)二者之间的关系,是司法实践中认定侵占罪的关键因素。在认定侵占罪时,需要划清非法占为己有与代为保管的界限,二者在主观上、客观上、保管期限和合法性四方面都存在区别,防止行为人以代为保管之名行非法占为己有之实。非法占为已有与拒不交出(退还)表达的是同一意思,拒不交出(退还)只是对非法占为己有的进一步补充、说明和印证,不属于侵占罪成立的客观要件。把非法占为己有作为侵占罪成立的唯一客观要件,不会扩大侵占罪的处罚范围,相反有利于遏制侵占罪的发生。  相似文献   
95.
四氧化三钴纳米粉体是众多纳米粉体之一,通过对其在打印纸、单光纸、胶版纸、牛皮纸、钱币、平板玻璃、塑料、油漆物面等客体、按照新鲜、1小时、4小时、12小时、24小时、48小时、96小时时段进行捺印的汗液手印的显现,发现它的显现效果较好,值得推广使用。  相似文献   
96.
通过一起右手食指缺损笔迹的检验,研究执笔机理。对右手食指缺损后对其书写运动形式的影响、笔迹特点及检验时注意事项作了一些有益的探讨。  相似文献   
97.
目的推动人体身高推断的再研究和人体躯干段体表解剖标志间距推断身高的创新应用。方法建立人体躯干段体表解剖标志间距参数采集规范,采集933例长三角地区成年人群数据,应用多元线性回归方法进行统计分析,建立推断身高的回归方程。结果建立了以性别(x_1)、颈臀线(x_2)、胸耻线(x_3)、肩髂间距(x_4)、肩宽(x_5)5个变量与身高(y)的多元线性回归方程y=105.406+5.414 x_1+0.436 x_2+0.286 x_3+0.225 x_4+0.193 x_5。结论该方法适合法医快速、简便且较准确地推断身高。  相似文献   
98.
Abstract: Black powder substitutes containing ascorbic acid are a group of low explosives that utilize ascorbic acid as the fuel. The analysis of these powders is complicated by the degradation of ascorbic acid which occurs rapidly in solution and may also occur as the powder ages. Aqueous extracts of both intact powders and postblast residues were analyzed by an existing ion chromatography/mass spectrometry (IC/MS) method used at the Bureau of Alcohol, Tobacco, Firearms and Explosives. Results have shown that while ascorbic acid itself is not detected in this method, its diagnostic degradation products (threonic acid, monohydrated diketogulonic acid, and oxalic acid) can be identified. In addition, anions from the inorganic oxidizers (perchlorate and nitrate) and combustion products such as chloride, chlorate, and nitrite, can be identified within the same experiment. While this IC/MS method shows promise, future modifications are necessary because of limitations in identifying threonate in postblast residues, as well as coeluting compounds observed in postblast residues.  相似文献   
99.
At outdoor crime scenes, cadaver-detection and blood-detection dogs may be tasked with locating blood that is days, weeks or months old. Although it is known that the odour profile of blood will change during this time, it is currently unknown how the profile changes when exposed to the environment. Such variables must be studied in order to understand when the odour profile is no longer detectable by the scent-detection dogs and other crime scene tools should be implemented. In this study, blood was deposited onto concrete and varnished wood surfaces and weathered in an outdoor environment over a three-month period. Headspace samples were collected using solid phase microextraction (SPME) and analysed using comprehensive two-dimensional gas chromatography – time-of-flight mass spectrometry (GC×GC–TOFMS). The chemical odour profiles were compared with the behavioural responses of cadaver-detection and blood-detection dogs during training. Data interpretation using principal component analysis (PCA) and hierarchical cluster analysis (HCA) established that the blood odour could no longer be detected using SPME–GC×GC–TOFMS after two months of weathering on both surfaces. Conversely, the blood-detection dogs had difficulty locating the blood samples after one month of weathering on concrete and after one week of weathering on varnished wood. The scent-detection dogs evaluated herein had not been previously exposed to environmentally weathered blood samples during training. Given that this study was conducted to test the dogs' baseline abilities, it is expected that with repeated exposure, the dogs' capabilities would likely improve. The knowledge gained from this study can assist in providing law enforcement with more accurate training aids for blood-detection dogs and can improve their efficiency when deployed to outdoor crime scenes.  相似文献   
100.
Conventional explosives 2,4,6-trinitrotoluene (TNT), nitroglycerin (NG), and ethylene glycol dinitrate (EGDN) sorbed to hair can be directly detected by an ion mobility spectrometer (IMS) in E-mode (for explosives). Terrorist explosive, triacetone triperoxide (TATP), difficult to detect by IMS in E-mode, was detected in N-mode (for narcotics). Three modes of sample introduction to IMS vapor desorption unit were used: (i) placement of hair directly into the unit, (ii) swabbing of hair and placement of swabs (i.e., paper GE-IMS sample traps) into the unit, and (iii) acetonitrile extracts of hair positioned on sample traps and placed into the unit. TNT, NG, and EGDN were detected in E-mode by all three sample introduction methods. TATP could only be detected by the acetonitrile extraction method after exposure of the hair to vapor for 16 days because of lower sensitivity. With standard solutions, TATP detection in E-mode required about 10 times as much sample as EGDN (3.9 mug compared with 0.3 mug). IMS in N-mode detected TATP from hair by all three modes of sample introduction.  相似文献   
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