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   131篇
  免费   1篇
各国政治   1篇
工人农民   1篇
世界政治   1篇
外交国际关系   9篇
法律   52篇
中国共产党   6篇
中国政治   12篇
政治理论   4篇
综合类   46篇
  2025年   1篇
  2022年   8篇
  2021年   5篇
  2020年   5篇
  2019年   1篇
  2018年   2篇
  2017年   3篇
  2015年   2篇
  2014年   5篇
  2013年   5篇
  2012年   5篇
  2011年   6篇
  2010年   3篇
  2009年   10篇
  2008年   10篇
  2007年   8篇
  2006年   9篇
  2005年   11篇
  2004年   8篇
  2003年   7篇
  2002年   3篇
  2001年   6篇
  2000年   4篇
  1999年   2篇
  1997年   1篇
  1993年   2篇
排序方式: 共有132条查询结果,搜索用时 0 毫秒
111.
如何合理组织与控制路口的左转弯交通流,是平交路口交通秩序管理及提高路口通行能力的核心问题。可以通过连续向右绕行,远引交叉等措施实现左转。同时这种路口禁止左转弯的交通管制要与路网布局匹配,尽可能不给车辆的行驶造成太大的不便。在条件允许的地方,仍需通过合理渠化设置左转专用车道和相位。  相似文献   
112.
台湾岛内有的媒体认为台商在大陆投资被边缘化了。这是不符合事实的。本文以大量的实际资料说明,台商在大陆投资始终为大陆所欢迎和重视。因而其投资趋势不但未缩小,还在扩大,技术也在升级。这是符合资本流动规律的,也是一种不可逆转的趋势。  相似文献   
113.
本文是以云南省为个案,对人才分布及其流动的公共部门化现象的实证研究。人才作为第一资源,在市场经济条件下的配置,首要和主要的,应是面向经济、走向市场,进入经济实体。但目前我国情况并非如此,尤其是在欠发达地区,人才分布和流动的公共部门化是一种普遍的现象。这种现象如果不能有效改变,将对我国的经济发展与市场经济体制的巩固产生重大的消极影响。  相似文献   
114.
    
Simultaneous determination of nitrate and nitrite in gunshot residue has been conducted by capillary electrophoresis using an acidic run buffer (pH 3.5). In previously developed capillary electrophoretic methods, alkaline pH separation buffers were used where nitrite and nitrate possess similar electrophoretic mobility. In this study, the electroosmotic flow has been reversed by using low pH running buffer without any additives. As a result of reversing the electroosmotic flow, very fast analysis has been actualized, well‐defined and separated ion peaks emerge in less than 4 min. Besides, the limit of detection was improved by employing large volume sample stacking. Limit of detection values were 6.7 and 4.3 μM for nitrate and nitrite, respectively. In traditional procedure, mechanical agitation is employed for extraction, while in this work the extraction efficiency of ultrasound mixing for 30 min was found sufficient. The proposed method was successfully applied to authentic gunshot residue samples.  相似文献   
115.
116.
Cloud computing is an information technology technique that promises greater efficiency and reduced-cost to consumers, businesses and public institutions. However, to the extent it has brought better efficiency and minimal cost, the emergence of cloud computing has posed a significant regulatory challenge on the application of data protection rules particularly on the regime regulating cross-border data flow. The Data Protection Directive (DPD), which dates back to 1995, is at odds with some of the basic technological and business-related features of the cloud. As a result, it is claimed that the Directive hardly offers any help in using the legal bases to ‘process’ and ‘transfer’ data as well as to determine when a transfer to a third country occurs in cloud computing. Despite such assertions, the paper argues that the ECJ's Bodil Lindqvist decision can to a certain extent help to delineate circumstances where transfer should and should not occur in the cloud. Concomitantly, the paper demonstrates that controllers can still make the most of the available possibilities in justifying their ‘processing’ as well as ‘transferring’ of data to a third country in cloud arrangements. In doing so, the paper also portrays the challenges that arise down the road. All legal perspectives are largely drawn from EU level though examples are given from member states and other jurisdictions when relevant.  相似文献   
117.
This case report describes a noncontact traffic accident involving a motor scooter and a tractor-trailer with a focus on the wind-drag effect. We used load cells to measure the drag force acting on a substantially similar motor scooter when a substantially similar tractor-trailer passes by it, taking into consideration various speeds of the tractor-trailer and distances between the two vehicles. A three-dimensional steady-state flow analysis was also performed by using the CFX program for computational fluid dynamics to examine the streamlines and the pressure distribution around the tractor-trailer at various speeds. From the experiment, for a separation distance of 1.0 m (3.28 ft) and a speed of 90 km/h (55.9 mph), the maximum resultant drag force is 124.5 N (28 lb); this constitutes a degree of force that could abruptly disrupt the stability in maneuvering by an operator who is unaware of the approaching tractor-trailer. In addition, a single equation that relates the tractor-trailer speed to the drag force that acts on the motor scooter was derived on the basis of the Reynolds number (Re) and the wind-drag coefficient (C(d)): C(d) = 1.298 × 10(-7) Re.  相似文献   
118.
机体死亡后组织细胞DNA含量与死亡时间推断   总被引:1,自引:0,他引:1  
Chen X  Shen YW  Zhao ZQ 《法医学杂志》2003,19(2):120-121
早期死亡时间的推断方法有许多,但近年来通过测量组织细胞DNA含量的变化规律来推断早期死亡时间越来越引起人们的注意。本文就常见的细胞DNA含量的检测方法、变化规律及其在实践中的应用情况加以论述,并对不同检测方法和实际应用效果、前景加以评定。  相似文献   
119.
In November 2016, China passed its first Cybersecurity Law, aiming to strengthen cyberspace governance through a number of initiatives, including Internet operator security protection, personal information protection, special protection of critical information infrastructure, local storage of data, and security evaluation for data export. This Article discusses the major concepts and principles of the Cybersecurity Law. It also discusses the tensions and controversies inherent in the law. All in all, the Cybersecurity Law exhibits distinctive Chinese characteristics. It is premised on the concept of cyberspace sovereignty and emphasizes security over free flow of data and freedom of speech. It provides a basic legal framework for cyberspace governance in China, to be supplemented by implementing regulations in years to come.  相似文献   
120.
本文从影像学检查方法的不同,重点对鼻骨骨折的影像学特点进行论述,比较了各种影像学检查方法的优劣。在法医学鉴定中,应根据实际情况,选择更优质的影像学检查,注意与正常的解剖变异相区别,并提出根据鼻骨骨折的影像分型进行法医学伤情鉴定的依据。  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