MARC目录子系统的开发及实验

本文介绍了ＭＡＲＣ目录文档与手工目录相比的优势,详细的叙述了作者在亲身开发实验系统时遇到的问题及解决方法。     

基于电子设计的低压电器改进

论述了发电厂和变电所的电气二次设备的新型设计思路,通过电子设计,使低压配电电器和控制电器的工作性能得到改善,节约了成本,同时提高了可靠性,符合小型化、高性能、模数化和组合化的发展趋势.低压配电电器主要对过电流、过载和欠电压状态进行检测,可利用数字式量化处理,从而通过电子电路实现状态分析,进而作出准确判断,触点正确动作.控制电器对准确性要求高,因此可通过电子设计有效提高控制的快速性和可靠性.电子设计思想的引入是低压电器微机式发展的基础,对下一代低压电器的更新具有参考意义.     

佛山配网自动化规划

通过分析现阶段配电自动化开展的情况,结合配电自动化现有的模式,对区域实际情况的综合比较指出佛山地区开展配网自动化的方向和出路,对配阿自动化开展的目标、原则、结构等方面进行了规划。     

我国煤矿综合自动化技术综述

本文根据煤矿综合自动化技术应用实践,综述了煤矿综合自动化技术实施方案的基本构架、结构模块、系统组成,以及部分具体内容,为煤矿综合自动化技术的实施提供参考.     

泔水油的电导率与其品质关系探讨

本文将不同浓度的污水与食用油搅拌混合,经静置后取其上层油层来人工模拟劣质泔水油.在单甘脂乳化作用下将其与水互溶后对其电导率进行测定,以反映金属离子含量对食用油电导率的影响.结果表明:食用油的电导率与污水的污染程度成显著正相关.因此可利用电导率对劣质泔水油进行快速检测.     

On the achievable tracking performance of NCSs over SNR limited channels

In this paper, the achievable tracking performance limitations of discrete-time, multi-input multi-output (MIMO) networked control systems (NCSs) are studied. The channel is modeled as an additive white Gaussian noise and signal-to-noise ratio (SNR) limited channel with feedback. Under this framework, the closed relationships among stabilization, tracking performance, and SNR limited are quantitatively revealed. Some new results a.erived according to the allpass factorization and Youla parameterization of two degrees of freedom controller. The results show that the best tracking performance is in connection with the unstable poles, non-minimum phase zeros of the system. It is also demonstrated that the tracking performance will be badly degraded by feedback channel noise and due to the SNR limited. Finally, a simulation example is presented to validate the conclusions.     

Distributed sensor fault diagnosis for a formation of multi-vehicle systems

In the paper, a distributed sensor fault detection and isolation scheme is presented for a network of second-order integrators. A new distributed control law is developed to achieve formation of the system. By using the integration information of distributed formation errors, the control law improves the robustness of the formation. A distributed observer is then designed in each vehicle based on the closed-loop dynamic model of the vehicle. Each vehicle updates the states of the distributed observer by employing the measurements of itself and the transmitted state estimations from its neighbors. Based on the distributed observer, a distributed fault detection observer and a distributed fault isolation observer are designed. The presented distributed fault detection observer in each vehicle is able to be sensitive to the faults of all vehicles in the system. By using the distributed fault isolation observers, each vehicle is able to be sensitive to the faults of itself, its neighbors and its neighbors’ neighbors and to be robust to the faults of other vehicles. Although the fault isolation of the proposed scheme is simple, computation loads of the scheme are lower than the current ones since only the model of the individual vehicle is used. Finally, the effectiveness of the control law and the fault diagnosis scheme is demonstrated by simulations and real-time experiments carried out based on a formation of three quadrotors.     

浙江省高职院校办学理念探析——以浙江机电职业技术学院为例

鉴于浙江机电职业技术学院在浙江省高职教育界乃至全国高职教育界都占据着重要的位置,具有相当大的影响力。因此,对其提出的“开放、合作、服务”办学理念给予专题研究,不仅具有一定的学理价值,亦不乏一定的现实意义。通过论证和研究,结果说明,只要坚持这一办学理念,高职教育一定会取得更大的成功。     

浅谈技改后制丝线的设备管理

新疆卷烟厂于2005年6月开始对3000kg／h制丝线进行了彻底的改造。改造后的新线是一条自动化的生产线,原有的设备管理模式已不能适应新生产线的要求,必须把以前的“以维修为主”的设备管理模式,转变为“以预防为主”的设备管理模式。     

Deep strategic mediatization: Organizational leaders’ knowledge and usage of social bots in an era of disinformation

We identified a lack of theoretical concepts and empirical knowledge about the perception and usage of social bots from the organizational and communication management perspective. Therefore, we first introduce social bots in the realm of communication and information management by using a profound literature review. Second, by building on mediatization theory and strategic communication, we introduce the concept of deep strategic mediatization. By surveying the attitudes towards and usage of social bots of leading European communication professionals (n = 2,247) from 49 European countries, we thirdly offer first indications how diverse European organizations in different European regions use social bots. Results indicate, that leading communication professionals in Central and Western Europe as well as Scandinavia perceive highly ethical challenges, while in Southern and Eastern Europe professionals are less skeptical regarding the usage of social bots. Only 11.5 percent (n = 257) declare their organization uses or are making plans to use social bots for strategic communication. They are used primarily for identifying and following social networks users. This refers specifically to the usage of digital traces for strategic communication purposes e.g., to identify topic area opinion leaders or social media influencers. However, this represents only a small minority of the sample – leading to the conclusion that only a small minority of organizations already practice deep strategic mediatization.