穿袜粉尘足迹检验中的形态变异问题

静电吸附方法提取穿袜粉尘足迹时,由于受到袜子对粉尘的缓冲和静电场强度影响而出现形态变异问题,造成特征不符的假象而干扰正确的检验结果,提请在足迹检验操作时引起注意.     

变动装订痕迹的特征及检验方法

对机制、半机制和手工装订的原始痕迹特征和变动痕迹特征进行叙述描绘,并着重介绍变动装订痕迹的检验方法.     

从数字资源开发看公安特色数据库的建设与发展

公安文献信息数字资源主要来自公安机关、院校、协会等建立的特色数据库;建设特色数据库应全面掌握公安业务信息,深入了解公安学科专业设置状况,在与其它公安院校合作的基础上,建立起具有鲜明学科、专业特色的数据库体系,以便更好地为用户提供高质量的专业化服务。     

统一战线与党的建设:建设中国特色社会主义的重要法宝

统一战线是中国共产党克敌制胜的法宝,是党的建设理论的重要组成部分.统一战线必须坚持党的领导,同时统一战线对加强党的思想、组织与作风建设具有着重要意义.文章指出,在党的统一战线理论中,统一战线已经成为国家制度、党和国家决策的重要环节,它已经不是一个简单的党的作风问题,而是制度建设的一个重要内容.     

中国共产党有效执政的基础、挑战及路径依赖

执政党的有效执政,最根本的是要有效地规范、利用和分配好自身的执政资源,这是提升其执政合法性的重要基础。在新时期,中国共产党要实现有效执政,虽有其一定的基础和源泉,但也面临着严重的挑战。整合好执政资源,是中国共产党实现有效执政的价值选择。     

The International Migration of Talent and Talent Security

There are basically three different types of internationally mobile talent： industry talents, professionals, and talents of the social sciences and culture. There are seven different factors underlying the international migration of talented people： the global income gap, the pursuit of personal worth, requirements of national development, technical innovation, industrial agglomeration, language and cultural compatibility, and immigration policies. The international migration of talent increasingly highlights the issue of international talent security, and has a far-reaching impact on personal safety, as well as national and global security. Therefore, cooperation on international talent safety issues should be strengthened in order to establish a more regular order to the international migration of talent, and to reduce the negative effects brought about by it, so as to promote economic globalization and sound economic and political progress in the international community.     

试论我国资源物权立法的不足与完善

资源物权作为重要的财产权 ,要求自然资源法应以传统物权法为理论基础 ,根据自然资源所特有的经济属性和生态属性 ,构建我国的资源物权制度。本文从资源物权制度的体系化设计、自然资源所有权主体、资源物权的变动、不动产资源物权的登记制度等几个重要方面对我国现行资源物权制度进行了反思与探讨 ,并在传统物权理论的基础上 ,提出了对策方案。     

冷战后印度一新加坡关系透析

印度与新加坡在历史上有着密切的联系。在冷战时期由于深受两极格局的制约、双方外交政策取向差异之影响,双边关系发展缓慢。自冷战结束后,印度与新加坡的哉略联系明显增强,在政治、经济、安全等领域合作日益加深。经济利益的追求、安全战略的契合、对恐怖主义和海盗活动的关注成为印度和新加坡战略合作的主要因素。     

Identification of forensically important sarcophagid flies (Diptera: Sarcophagidae) in China, based on COI and 16S rDNA gene sequences

Insects attracted to cadavers may provide important indications of the postmortem interval (PMI). However, use of the flesh flies (Diptera: Sarcophagidae) for PMI estimation is limited as the species are often not morphologically distinct, especially as immatures. In this study, 23 forensically important flesh flies were collected from 13 locations in 10 Chinese provinces. Then, a 278-bp segment of the cytochrome oxidase subunits one (COI) gene and a 289-bp segment of the 16S rDNA gene of all specimens were successfully sequenced. Phylogenetic analysis of the sequenced segments showed that all sarcophagid specimens were properly assigned into four species (Boerttcherisca peregrina [Robineau-Desvoidy, 1830], Helicophagella melanura [Meigen, 1826], Parasarcophaga albiceps [Meigen, 1826], and Parasarcophaga dux [Thompson, 1869]) with relatively strong supporting values, thus indicating that the COI and 16S rDNA regions are suitable for identification of sarcophagid species. The difference between intraspecific threshold and interspecific divergence confirmed the potential of the two regions for sarcophagid species identification.     

Fabrication of compound nonwoven materials for soft body armor

The primary objective of body armor research is the development of low-cost, lightweight, wearable garments that effectively resist ballistic impact. This study introduces a material intended to reduce nonpenetration trauma by absorbing energy from ballistic impacts. Layers of web were made by low-melting point polyester (LMPET) on unaligned fibers of high-strength polyamide 6 (HSPA6). A compound nonwoven fabric was made by laying high-strength Vectran filaments between two layers of HSPA6-LMPET web. The new fabric underwent needle punching and thermal bonding to form a composite sandwich structure. The new fabric was subjected to a falling weight impact test and a ballistic impact test. The results indicated that the material with the new design reduced maximum indentation depth by 8%. Furthermore, soft body armor made from the material with the new design would cost less to produce and would weigh 22.5% less than conventional soft body armor.