基于OPNET的MVB总线仿真研究

列车网络控制技术是高速列车发展的一项关键技术.为了评估多功能车辆总线(Multiple Vehicle Bus,MVB)车辆级网络通信系统的性能,优化网络设计,采用Opnet Modeler搭建车辆级通信网络模型,包括车辆的网络拓扑结构模型、链路模型、节点模型和进程模型.利用所搭建的模型,对车辆级通信网络的时延性、吞吐...     

基于.NET架构的网络培训系统设计与实现

网络教育培训是知识经济时代构筑终身学习教育体系的重要方式。使用ASP.NET、AJAX、ADO.NET等.NET技术开发的网络培训系统,以用户需求为中心,为培训用户和培训机构提供了一个功能强大的交互平台。可提供更快的响应速度,更加丰富的图形界面,提升用户体验,提高系统的可移植性和扩展性。     

基于主干河流修正TIN构建的DEM平原区河网提取

平原地区的河网提取一直是基于数字高程模型(DEM)的水系提取的难点。尝试利用主干河流修正不规则三角网(TIN),以提高DEM平原地区地形模拟的精度(基本方法为利用已存在的主干河流线,对其所经区域进行高程赋值,约束TIN的构建,然后进行DEM模拟),基于此进行平原区河网提取。实验表明,此种方法下,平原区提取的主干河流与实际河流有较大的吻合。     

浅析蜜罐技术与IDS结合的可行性

基于入侵检测技术的入侵检测系统(IDS),与传统的防火墙相比,有能够同时监控进出网络的数据流,不需要跨接在任何链路上,无须网络流量流经便可以工作等优点,但也存在一些缺陷,比如对未知的攻击行为无能为力,漏报率和误报率过高等.蜜罐技术是基于主动防御理论而提出的一种入侵诱骗技术,它的主要作用就是通过模拟真实的网络和服务来吸引黑客进行攻击,收集入侵者的特征数据,为发现新的攻击类型提供重要的参考数据.将蜜罐技术引入到IDS当中可以大大完善IDS误报率和漏报率高的缺点.着重分析了蜜罐技术与IDS结合的可行性,并提出了一种基于蜜罐技术的入侵检测模型.     

基于不同VANET应用的路由协议选择分析

不同VANET应用对网络属性的要求和各自的特性影响路由协议的选择和使用。选择合适的路由协议将实现更好的网络性能,提供更高效的服务。通过分析VANET的5类应用的特点和对网络的要求,结合不同种类路由协议的特性,主要针对单播和多播情况下路由协议选择原因进行阐述,并给出单播协议中GPSR＋AGF和CAR这两种路由协议的构造方式。     

博洛尼亚进程后欧洲工程教育专业认证的发展研究——以欧洲工程教育认证网络为例

博洛尼亚进程对欧洲高等工程教育专业认证产生了重要的影响,本文以欧洲工程教育认证网络(ENAEE)及欧洲工程教育专业认证(EUR-ACE?)体系的出现和发展为切入点,分析了其历史、背景、组织结构、认证标准,及其与欧洲各国工程教育专业认证之间的关系,并将EUR-ACE?认证体系与华盛顿协议进行了比较,发现EUR-ACE?体系在欧洲层面建立起了一种分散式的第一阶段和第二阶段统一的认证体系。EUR-ACE?体系既强调灵活性和兼容性,又努力保证各国的多样性。     

An Education Worth Having: The Aspirations and the Development of the Whole Education Network in England

The Whole Education National Network is a dynamic national not-for-profit partnership of schools and organisations that believe that all children and young people are entitled to an education that supports the development of wider skills, qualities and characteristics to enable them to thrive in life, learning and work, as well as conventional academic achievement. The article outlines the background to the development of the growing network of some 150 schools plus partner organisations and its core aims. It then considers what the Network is achieving and what it is learning about its approach as it grows. It offers and is seeking to embed and sustain an approach to school development that is ‘values-led, evidence-informed and impact-focused’. It is also predicated on a commitment to and belief in peer-to-peer collaboration, inspired and encouraged by the work of leading academics, thinkers and practitioners. Whole Education is also a response to what many observers and commentators identify as a weakness of the English and many other systems: the gap between the outcomes achieved by the more disadvantaged and other students. Part of its moral purpose is to help to narrow that gap, underpinned by a belief that focusing on immediate outcomes and test scores is not enough on its own. The Network operates in the belief that it will only be through the commitment to an entitlement to a ‘whole education for all’ that any school or system will truly narrow the gap and make a real difference to the life-chances of all young people. School leaders and schools that have gravitated towards Whole Education seek like minds to share and, more importantly, develop both their thinking and strategies employed to help achieve their goals. At the heart of the change model underpinning Whole Education is the development of effective communities of practice that develop professional capital and unleash the creativity of teachers. Creating, embedding and sustaining a national self-funded school-led network committed to achieving longer-term aspirations rather than immediate needs is both inspiring and challenging. The pressure to respond to short-term targets in terms of student outcomes and accountability pressures has meant that the energy and resource tend to be focused on the immediate rather than the medium- or longer-term needs. Whole Education provides a powerful example of how schools that share common aspirations can seize the agenda, have real impact on students and demonstrate the potential of a self-improving school system.     

Interactions between Niche and Regime: An Analysis of Learning and Innovation Networks for Sustainable Agriculture across Europe

Abstract

Purpose: This paper aims to reveal, and contribute to an understanding of, the processes that connect learning and innovation networks in sustainable agriculture to elements of the mainstream agricultural regime. Drawing on the innovations and transition literature, the paper frames the analysis around niche-regime interaction using the notion of niche-regime compatibility.

Design/Methodology/Approach: 17 Learning and Innovation Networks for Sustainable Agriculture (LINSA) engaged in agricultural food production, non-food and rural development were analyzed. In line with the project's transdisciplinary approach data were collected in a series of participatory workshops.

Findings: Five modes of LINSA-regime interaction are distinguished based on compatibility. The level of LINSA-regime compatibility influences the extent of the diffusion of LINSA ideas and practices into the regime. However, interaction processes within these modes reveal multiple and diverse connections between LINSA and regime entities suggesting a more complex relationship exists.

Practical implications: A range of connecting processes and activities (for example, certification, exemption from regulation, facilitation of networking) can bring about effective LINSA-regime interaction and could be externally supported.

Originality/Value: Empirical evidence from 17 case studies provides valuable insights from a number of different contexts across Europe. By directing analysis of interaction at the level of LINSA (niche project), rather than at the macro level, the study offers an original perspective. It suggests that the transition to sustainable agriculture might be understood as a complex of interactive processes leading to a series of adaptive changes, rather than as regime change.     

研究项目中课题组成员关系的差序格局探析——以图情文类国家社科基金项目为例

社会学家费孝通先生在研究中国乡村结构时提出了差序格局的概念,用以说明中国传统社会不同于西方社会“团体格局”的特点.差序格局的形成受到以下因素影响：血缘、地缘、经济水平、政治地位、知识文化水平.本研究以2005-2010年图情文类国家社科基金项目为样本,运用社会网络分析方法,分别从地缘、业缘和学缘三个方面探讨了研究项目课题组成员中反映出的关系和结构,探究并验证在课题研究中是否存在“差序结构”,并分析这种差序格局对学术研究的影响.     

基于SDN的PTN网研究

本文从SDN的概念和总体架构出发,总结了SDN技术的重要特征和引入PTN通信网络的优劣势,并与运营商的业务和网络需求互相结合,提出了在运营商PTN网络中引入SDN技术的场景以及实现的方案,为现有通讯网络迈向未来网络提出了一种新的发展思路。