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A new delayed state-variable model for networked control systems is presented, upon which a linear quadratic regulator (LQR) is designed. A method of delays-estimation online is also given. A fuzzy logic with LQR controller is addressed for the difficulty on implementation of LQR in networked control systems (NCSs) with time-variant delays. Simulation results prove that the novel controller can make the system stable and robustly preserve the performance in terms of time-variant delays. 相似文献
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网络环境下信息伦理问题的思考 总被引:5,自引:0,他引:5
网络环境下的信息伦理,其主导是信息价值观,这也是信息文化的核心。价值观虽然只是人们信息行为的准则,但是它却是维系信息社会正常运转的力量。 相似文献
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利用Blackboard网络教学平台提升信息检索公选课品质 总被引:3,自引:0,他引:3
Blackboard教学管理平台集课程组织、资源建设、评价及交流等功能于一体,已经广泛应用于国内外各类教育机构的教学活动中。实践证明,充分利用Bb这个成熟完善的教学平台,在完善教学体系、加强交流互动、进行教学评估以及开展远程教学等方面,对提升信息检索课的品质都非常有帮助。 相似文献
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提高网络学习社区黏度之策略研究 总被引:3,自引:1,他引:2
Web2.0技术和SNS工具的引入促进了网络学习社区的发展也带来了一些问题,文章试图从提高社区黏度的角度来探寻建设网络学习社区的良方。参考商业模式下SNS社区的成功范例,并结合网络学习社区的核心要素,从知识黏度、社交黏度和技术黏度三个层面综合着手提出了一些具体的策略。 相似文献
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Robert Asen 《Quarterly Journal of Speech》2017,103(4):329-349
This essay considers the challenges that neoliberalism raises for conceptual models and practices of a multiple public sphere. Engaging difference and attending to inequality, a multiple public sphere facilitates the circulation of a dynamic public good that may articulate mutual standing and relationships among people to enable the construction of a collective “we” for coordinated action. Weakening relationships among people and devaluing coordinated action, neoliberalism envisions a public of atomistic individuals who compete with one another for comparative advantage. Flattening difference and obscuring inequality, a neoliberal public presumes a universal subject that obscures its own particularity and discounts the uneven burdens faced by those who cannot seamlessly identify with its mode of subjectivity. Further, for a neoliberal public, inequality serves as the condition and end of competition. Resistance to neoliberalism may arise in the networked locals of a multiple public sphere, as advocates reclaim connections that neoliberalism seeks to deny. 相似文献
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基于用户需求的网络信息服务建设 总被引:14,自引:0,他引:14
本文通过对信息用户在网络环境下对信息需求变化的分析,认为要适应信息用户需求的这一变化,网络信息服务商必须从不断增加网络信息资源的数量和不断提高网络信息服务的质量两个方面着手。 相似文献