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101.
Issa Amadou Tall 《International journal of control》2013,86(10):1994-2011
This article discusses the feedback equivalence of multi-inputs feedforward control systems via smooth (resp. analytic) feedback transformations. We first address the state (resp. feedback) linearisation problem, and provide easily computable algorithms that yield explicit state (resp. feedback) linearising coordinates for systems in strict feedforward form. The application of the algorithms does not require checking the commutativity (resp. involutivity) of the distributions associated with the system, and the algorithms fail after few steps if the system is not linearisable. In the latter case, the algorithms are extended to provide coordinate systems bringing the system into a normal form which is a smooth (resp. analytic) counterpart of Kang's formal normal form. Illustrative examples for both the linearisation and convergent normal form include the vertical take off and landing aircraft, the multi-vehicle wireless testbed among others. 相似文献
102.
Linear (dynamical) systems are central objects of study (in linear system theory), and ARMA- and Fliess models are two very important classes of models that are used to represent them. This article is concerned with the question of what is a relation between them (in case of higher dimensions). It is shown that the category of linear systems, the ‘weak’ category of ARMA-models and the category of Fliess models are equivalent to each other. 相似文献
103.
An algorithm for revealing the piecewise-linear drift of the value of the comparison standard when making international comparisons
is proposed. The probabilities of errors of the 1st and 2nd kinds are estimated and recommendations are made on choosing the
parameters of the algorithm. A comparative analysis of different algorithms for identifying a point of discontinuity of the
piecewise-linear drift model is carried out.
__________
Translated from Izmeritel’naya Tekhnika, No. 2, pp. 68–72, February, 2008. 相似文献
104.
E. Renaot Y. Hermier M. H. Valin G. Bonnier F. Adunka A. Van Der Linden M. Dobre M. Šmíd A. Bronnum T. Weckstrom E. Tegeler U. Noatsch M. Anagnostou E. Turzo-Andras S. Nemeth M. White P. Marcarino P. Steur A. Pauzha V. Augevicius M. de Groot J. Nielsen F. Helgesen W. Roszkowski E. Grudniewicz R. Kuna E. Filipe I. Lobo S. Gaita V. Chimenti J. Ivarsson S. Duris J. Ranostaj J. Bojkovski A. Steiner S. Ugur J. Gray S. Bruce R. Rusby D. Head 《International Journal of Thermophysics》2008,29(3):991-1000
The EUROMET.T-K3 comparison is the regional extension of CCT-K3. The comparison involved the six European national metrology
institutes (NMIs) previously involved in CCT-K3 (LNE-INM/CNAM, SMU, INRiM, NMi-VSL, NPL, PTB) and 18 additional European national
laboratories. The comparison was divided into five different loops, each coordinated by a co-pilot chosen from the laboratories
having participated in the CCT-K3 comparison. LNE-INM/CNAM played the role of pilot in linking the five loops. In each loop,
an artifact in the form of a standard platinum resistance thermometer (SPRT, 25 Ω) was circulated among the participating
laboratories. To have sufficient information about the possible drift of the SPRTs, the co-pilots performed a calibration
over the full temperature range at the beginning and at the end of the loop. A EUROMET reference value (ERV), taking into
account the whole comparison, was defined, and the differences (T
Lab − T
ERV) were calculated with the associated uncertainties. The method for establishing the link between the participants in CCT-K3
and in EUROMET.T-K3 is described.
Institut National de Métrologie (BNM-INM/CNAM at the time of the comparison, LNE-INM/CNAM since 1 January 2005), Paris, France. 相似文献
105.
Rajeev Agrawal 《Systems & Control Letters》1989,13(5):405-412
Certainty equivalence control with forcing has been shown to be optimal for several stochastic adaptive control problems with the average cost per unit time criterion. Recently researchers have started looking at stochastic adaptive control problems with a view to minimizing the rate of increase of the learning loss. This criterion is stronger than the average cost per unit time criterion. Certainty equivalence control with forcing does not usually suffice for the learning loss criterion and one has to develop fairly complicated schemes in order to achieve optimality. The objective of this paper is to see how well one might be able to do with a certainty-equivalence-control-with-forcing type of scheme. In particular we construct a class of such schemes whose learning loss is O((log n)1+δ) for δ > 0, whereas optimal schemes typically have a O(log n)learning loss. 相似文献
106.
本文引进速度码长概念作为测定汉字键盘输入系统速度素质的客观指标, 以解决当前汉字字、词输入、软件智能处理的输入系统对评佑技术提出的新课题。对速度素质的计算机自动测定摆脱了由操作员作竞赛性测定人为素质的干扰,为汉字键盘输入评测提出新的理论依据和提供了测试软件。 相似文献
107.
差分放大电路单端输入信号的射极耦合传输及等效变换 总被引:2,自引:2,他引:0
用电路分析的方法对差分放大电路单端输入信号的射极耦合传输及等效变换进行了深入研究,目的是探索单端输入差分放大电路中输入信号的作用过程。差分放大电路的单端输入信号,经差分管的发射极耦合传输,在输入回路可等效变换为差模输入信号、共模输入信号的叠加,且等效变换时与发射极电阻Re取值大小无关,Re取值大小反映了对共模输入信号的抑制程度。所述方法的创新点是给出了单端输入信号在输入回路作用下的物理过程,完善了单端输入信号的等效变换方法。 相似文献
108.
109.
研究了双突跃电位滴定法测定壳聚糖脱乙酰度的准确性以及壳聚糖溶液质量浓度、粘度、不同脱乙酰度等因素对滴定终点测定结果的影响.结果表明:壳聚糖样品质量浓度控制在2~6g/L,利用双突跃电位滴定法可以测定壳聚糖的脱乙酰度,不同样品脱乙酰度测定结果RSD(相对标准偏差)小于0.61%(n=3),该方法具有较高地准确性,可以用于壳聚糖生产和加工过程中的质量控制与检测. 相似文献
110.
Null hypothesis statistical testing (NHST) has been debated extensively but always successfully defended. The technical merits of NHST are not disputed in this article. The widespread misuse of NHST has created a human factors problem that this article intends to ameliorate. This article describes an integrated, alternative inferential confidence interval approach to testing for statistical difference, equivalence, and indeterminacy that is algebraically equivalent to standard NHST procedures and therefore exacts the same evidential standard. The combined numeric and graphic tests of statistical difference, equivalence, and indeterminacy are designed to avoid common interpretive problems associated with NHST procedures. Multiple comparisons, power, sample size, test reliability, effect size, and cause-effect ratio are discussed. A section on the proper interpretation of confidence intervals is followed by a decision rule summary and caveats. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献