多媒体通信网络边缘实施策略研究

多媒体通信网络具有连接通信主机、数位设备多和业务种类多等特点。因为IPv4地址面临枯竭,IPv6地址使用迫在眉捷。利用现有IPv4网络为承载网络,在边缘网络实现IPv6化,是当前解决IPv4地址严重不足的一种解决方法。为了实现IPv4与IPv6的业务服务兼容,可以6to4和区分服务来解决两类地址转换引起的服务质量问题。     

国内外竞争情报文献计量研究综述

随着科学计量学方法及可视化技术的发展,越来越多的学科应用它来研究学科领域的研究进展与演进态势。本文首先利用CNKI学术趋势分析了目前国内竞争情报的相关研究背景,然后分别研究了国内外竞争情报文献计量的现状,并将二者进行对比指出目前存在的不足,最后提出今后应该多利用科学计量学与可视化方法研究竞争情报文献。     

一种车用智能报警装置的研究

目前学界对车用儿童滞留智能报警装置的研究大多停留在设计层面上,市场投入利用还不多.通过详细介绍一种车用智能报警装置的研究过程、装置设计原理、技术特点和需攻克的难题等,来促进此类智能报警装置实现产品的市场化,从而防止儿童因车内温度和有害气体的积聚而发生的安全事故.且该装置是一种具有主动实施安全防范措施的电子智能化产品.     

治边思想、国家决策与明清大理地区的生态环境变迁——兼论白族生态文化的价值

明清王朝的治边思想基本继承了汉唐王朝"守中治边""守在四夷"的思想,两代王朝在西南边疆驻军、移民、屯垦。特别清雍正以后,迫于人口压力,移民规模浩大的问题,建立了比明代卫所制度更为重要的汛塘制度,更进一步地促进了西南边疆的开发。在这样的背景下,自然条件相对优越、农业发展程度较高的大理地区更是如此。农业生产是对自然生态环境有目的地改造,大规模的无序开发必然引起大理地区自然生态环境的变迁。     

What characterizes children nominated as gifted by teachers? A closer consideration of working memory and intelligence

Teacher nominations are often used in school settings to identify gifted children. However, although high intelligence is part of almost all definitions of giftedness, prior research has consistently shown that not all children nominated as gifted by teachers have high intelligence. In order to further understand the characteristics of these students, we herein explore the role of another cognitive construct, namely working memory (WM). In a sample comprising N = 81 fourth graders, both WM and intelligence showed the same predictive value for characterizing teacher-nominated gifted children, pointing to the importance of the thus-far-unattended WM for characterizing these students.     

追寻生命的出口--评戴来长篇小说《爱上朋友的女友》

戴来是“70后”女作家中最有个性的小说家之一,其长篇小说《爱上朋友的女友》是一部能够彰显其独特文学气质和艺术实力的力作。在这部小说中,戴来打造了一个荒诞、边缘化的灰暗城堡,城堡中缱绻着一群都市的边缘小人物,然而这些边缘人却是一群充满生命情态的人,他们的生命中溢满了挣扎、反思的生命追寻。透析这些边缘人的生存状态,戴来深刻地解剖了当代都市边缘人在灰暗生活中真实、复杂的心灵体验。     

Diatom-inspired multiscale mineralization of patterned protein–polysaccharide complex structures

Marine diatoms construct their hierarchically ordered, three-dimensional (3D) external structures called frustules through precise biomineralization processes. Recapitulating the remarkable architectures and functions of diatom frustules in artificial materials is a major challenge that has important technological implications for hierarchically ordered composites. Here, we report the construction of highly ordered, mineralized composites based on fabrication of complex self-supporting porous structures—made of genetically engineered amyloid fusion proteins and the natural polysaccharide chitin—and performing in situ multiscale protein-mediated mineralization with diverse inorganic materials, including SiO₂, TiO₂ and Ga₂O₃. Subsequently, using sugar cubes as templates, we demonstrate that 3D fabricated porous structures can become colonized by engineered bacteria and can be functionalized with highly photoreactive minerals, thereby enabling co-localization of the photocatalytic units with a bacteria-based hydrogenase reaction for a successful semi-solid artificial photosynthesis system for hydrogen evolution. Our study thus highlights the power of coupling genetically engineered proteins and polysaccharides with biofabrication techniques to generate hierarchically organized mineralized porous structures inspired by nature.     

Extraterrestrial artificial photosynthetic materials for in-situ resource utilization

Aerospace milestones in human history, including returning to the moon and manned Martian missions, have been implemented in recent years. Space exploration has become one of the global common goals, and to ensure the survival and development of human beings in the extraterrestrial extreme environment has been becoming the basic ability and technology of manned space exploration. For the purpose of fulfilling the goal of extraterrestrial survival, researchers in Nanjing University and the China Academy of Space Technology proposed extraterrestrial artificial photosynthesis (EAP) technology. By simulating the natural photosynthesis of green plants on the Earth, EAP converts CO₂/H₂O into fuel and O₂ in an in-situ, accelerated and controllable manner by using waste CO₂ in the confined space of spacecraft, or abundant CO₂ resources in extraterrestrial celestial environments, e.g. Mars. Thus, the material loading of manned spacecraft can be greatly reduced to support affordable and sustainable deep space exploration. In this paper, EAP technology is compared with existing methods of converting CO₂/H₂O into fuel and O₂ in the aerospace field, especially the Sabatier method and Bosch reduction method. The research progress of possible EAP materials for in-situ utilization of extraterrestrial resources are also discussed in depth. Finally, this review lists the challenges that the EAP process may encounter, which need to be focused on for future implementation and application. We expect to deepen the understanding of artificial photosynthetic materials and technologies, and aim to strongly support the development of manned spaceflight.     

An information delivery model for banking business

Banking is an enterprise consists of different levels of users with the requirement of different levels of information. We propose an information delivery model for banking business which takes information from business analysis and finds the best user for this information with respect to criteria and delivers the multi criteria reporting. There are many multi criteria decision making techniques [MCDM] available to find the best alternative in MCDM problem. We applied fuzzy MCDM technique which resolves inconsistency and uncertainty issues involved in decision making of information delivery for bank users. This model classifies most preferred user to least preferred user for the given information using fuzzy score. This information delivery model and its layers can be applied to other domains to build information delivery model.