共查询到20条相似文献,搜索用时 125 毫秒
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超声液位测量仪的研究 总被引:9,自引:0,他引:9
介绍探头贴底式超声液位检测原理和数据处理方法。根据仪表工作时各种随机干扰对检测信号影响大等特点,采用单片机将数据平滑方法用于液位检测信号数据处理中,有效地减小了各种随机噪声的影响。 相似文献
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基于容栅传感器和单片机的变形检测系统 总被引:1,自引:0,他引:1
文章介绍了基于容栅传感器和89C52单片机的位移检测系统的系统组成,重点分析了容栅数显卡尺信号转换原理及软件实现.该系统主要用于对结构的变形进行检测。 相似文献
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文中介绍一种一氧化碳检测报警器,利用恒电位电解法原理制成的传感器,并配以最新电子元器件组成检测仪,用于对矿井,化工,煤炭,电力,冶金,环保等有关部门的一氧化碳检测。 相似文献
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文中介绍一种一氧化碳检测报警器,利用恒电位电解法原理制成的传感器,并配以最新电子元器件组成检测仪。用于对矿井、化工、煤炭、电力、冶金、环保等有关部门的一氧化碳检测。 相似文献
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介绍了几种应用电导液位传感原理的液位控制电路。可用于一切具有导电离子非易燃液体的液位测量与控制,具有控制灵敏,不腐蚀电极和体积小等特点,尤其地小型液槽的液位检测与保护。 相似文献
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小波变换在电路故障诊断中的应用 总被引:1,自引:0,他引:1
介绍了利用小波变换来检测信号的奇异性特征的原理,对信号的奇异性进行了定义,并将其用于电路故障诊断中,解决了传统故障诊断方法中对故障存在的知识获取“瓶颈”问题。实验证明提出的方法取得了较好的应用效果。 相似文献
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Gauss' principle of least constraint is solved in a sequential fashion via dynamic programming in this paper. The solution itself constitutes a new principle for constrained motion, which we may name the Bellman-Gauss principle for constrained motion. 相似文献
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以生命科学对人类视觉系统的长期研究成果为出发点,提出目标辨识四要素原则。并以此为基础,结合该领域前辈们研究的经验教训,努力在彩色机器视觉领域开拓一条新的思路,提出了一种满足目标辨识四要素原则的基于影射·特征·知识的辨识复杂彩色目标的方法。实验证明了该方法的正确性。 相似文献
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In this paper, we treat a social choice function as a decision principle and apply the concept of the rational decision principle to it. Then we derive the concept of the order rational decision principle. We show that the rational decision principle is suitable for an integral framework for a social choice, as well as for decision making under uncertainty and multiobjective decision making. We also show that some decision principles are considered to be models of Arrow's decision principle in a weaker sense. 相似文献
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张代远 《计算机工程与应用》2006,42(16):76-79,139
文章提出了分析非线性流水线的迭加原理。证明了迭加原理公式的一般形式和递推形式。迭加原理可以方便地用来建立绘制非线性流水线无冲突调度状态图的规则。最后,讨论了一种特殊和重要的情形。 相似文献
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HAN-SHENG WU 《International journal of control》2013,86(1):373-380
This paper is mainly concerned with the derivation of the necessary conditions, called the ‘generalized maximum principle’, for the optimal control of generalized state-space systems with a more general form. By making use of a method of the modern calculus of variations which has been used for the proof of Pontryagin's maximum principle, the generalized maximum principle is derived, and some problems related to this principle are discussed in detail. In addition, an illustrative example is given in the light of this principle. 相似文献
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This paper provides a complete stability proof of Theorem 1 of the above-mentioned paper (Canudas-de-Wit et al., 1995) for the tracking and the regulation case. In the paper, the proof presented for Theorem 1 only holds for the regulation case where the LaSalle's invariant principle may be invoked. In the tracking case, the closed-loop system becomes a nonautonomous one, and arguments other than the LaSalle's invariant principle should be used. Here we present these arguments and show that Theorem 1 holds for both cases 相似文献
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Hiroaki Nishikawa 《Computers & Fluids》2011,49(1):62-86
In this paper, we introduce a general principle for constructing robust and accurate viscous discretization, which is applicable to various discretization methods, including finite-volume, residual-distribution, discontinuous-Galerkin, and spectral-volume methods. The principle is based on a hyperbolic model for the viscous term. It is to discretize the hyperbolic system by an advection scheme, and then derive a viscous discretization from the result. A distinguished feature of the proposed principle is that it automatically introduces a damping term into the resulting viscous scheme, which is essential for effective high-frequency error damping and, in some cases, for consistency also. In this paper, we demonstrate the general principle for the diffusion equation on uniform grids in one dimension and unstructured grids in two dimensions, for node/cell-centered finite-volume, residual-distribution, discontinuous-Galerkin, and spectral-volume methods. Numerical results are presented to verify the accuracy of the derived diffusion schemes and to illustrate the importance of the damping term for highly-skewed typical viscous grids. 相似文献
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本文讨论了一类双向确定性系统的最优控制问题,我们利用Ekeland变分原理,推得了最优控制所满足的最大原理。同时,对线性系统的情况,我们还证明了最大值条件的充分性。 相似文献
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Machine Learning - This paper establishes the algorithmic principle of alternating projections onto incoherent low-rank subspaces (APIS) as a unifying principle for designing robust regression... 相似文献