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本文结合笔者多年工作的实践经验,对目前安全网络构建中防火墙技术原理进行了深入的比较与分析,谨供大家作参考之用。 相似文献
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随着信息时代发展的加快,企业对网络方面的人才要求越来越高,而作为人才培养基地的学校,经费有限,硬件设施跟不上社会对人才培养的要求。网络仿真软件是一个为网络学员设计的学习平台、媒体和仿真器,支持学生和教师建立仿真、虚拟和活动网络模型,通过一组简化的网络设备和协议模型,真实地体现计算机网络教学的直观性和形象化,帮助缺乏网络设备、带宽交互条件的学生和教师开展教学活动。 相似文献
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This paper analyzes a communication network, used by customers with heterogeneous service requirements. We investigate priority queueing as a way to establish service differentiation. It is assumed that there is an infinite population of customers, who join the network as long as their utility (which is a function of the queueing delay) is larger than the price of the service. We focus on the specific situation with two types of users: one type is delay-sensitive (voice), whereas the other is delay-tolerant (data); these preferences are reflected in their utility curves. Two models are considered: in the first the network determines the priority class of the users, whereas the second model leaves this choice to the users. For both models we determine the prices that maximize the provider's profit. Importantly, these situations do not coincide. Our analysis uses elements from queueing theory, but also from microeconomics and game theory (e.g., the concept of a Nash equilibrium). 相似文献
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综述了分子影像中的各种方法,特别针对光学分子成像技术结合生物组织的混浊介质实例介绍了Monte Carlo方法及其模拟传播流程。目前在非接触式光学断层成像的MC方法研究有生物组织中光传输模型和自由空间光传输模型两种方向,分别介绍了其在本领域的研究现状。由此可知MC方法对活体组织安全快速的无损检测有重要作用。 相似文献
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文章以卷烟设备原机电控采集系统为基础建立了一套面向整个卷接包工序的现场设备数据采集系统,实时、准确地采集现场设备的各种生产、设备、质量、消耗数据,为车间生产和调度提供了实时生产数据和依据。 相似文献
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