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1.
The cyclic voltammetry and the potential-time curve after galvanostatic electrolysis were used to study the electrode processes of Cu(Ⅱ) in CH3OH solution and DMSO solution. The electroreduction of Cu(Ⅱ) to Cu on a Pt electrode proceeds in two steps: Cu(Ⅱ) + e = Cu(Ⅰ); Cu(Ⅰ) + e = Cu. The reduction potential of Cu(Ⅱ) in DMSO solution is more negative than that in CH3OH solution, and the diffusion coefficient of Cu(Ⅱ) ion in DMSO solution is larger than that in CH3OH solution because the polarity of DMSO is larger than that of CH3OH observably and has a stronger solvating power. 相似文献
2.
Discrete‐time output regulation of linear systems with state and/or input constraints on magnitude is considered. Structural properties of linear plants are identified under which the so‐called constrained semi‐global and global output regulation problems are solvable. As in the case of continuous‐time systems, an important aspect of our development is a taxonomy of constraints showing a clear relationship between the constraint types and the output regulation results. Solvability conditions are developed for semi‐global and global output regulation problems. Appropriate regulators are constructed for problems that are solvable. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
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沈文国 《兰州工业高等专科学校学报》2007,14(3):4-7
设f:[0,1]×R2→R满足Caratheodory,a(·)∈L1[0,1],a(·)≥0,∫t00a(t)dt-∫1t0a(t)dt≠1,t0∈(0,1),(1-t)e(t)∈L1(0,1).运用Leray-Schauder原理考虑了二阶奇异边值问题:x'(t)=f(t,x(t),x'(t)) e(t),0<t<1x'(0)=0,x(1)=∫t00a(t)x(t)dt-∫1t0a(t)x(t)dt在C1[0,1)上解的存在性. 相似文献
5.
In this paper, a fuzzy relation equation system with the generalized conjunction and implication operations is considered. Necessary and sufficient conditions of solvability of this system are proved. The case where these conditions are not fulfilled is considered and the solvability degree of the approximate solution is estimated. The interpolation property of the solution independently on whether it is precise or approximate is established. 相似文献
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Study on the closed-loop properties of GPC 总被引:4,自引:0,他引:4
Based on the coefficient mapping of eigenpolynomial from plant to GPC closed-loop system in the IMC structure, the solvability of the optimal control law of GPC and some properties of GPC in relationship with tun ing parameters are discussed Theorems on GPC resulting in deadbeat control are given by properly choosing the design parameters. Furthermore, new result about reducing GPC closed-loop system is derived, which extends the former conclusions. It also provides a new way to study the properties of GPC system based on coefficient mapping 相似文献
8.
In this paper we are concerned with networks obtained by connecting independent sources, linear resistors and non‐linear ideal op amps. A necessary and sufficient condition for the existence and uniqueness of solutions for every positive output saturation voltage of the op amps and every value of the independent sources is found. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
9.
John N. Tsitsiklis Vincent D. Blondel 《Mathematics of Control, Signals, and Systems (MCSS)》1997,10(1):31-40
We analyze the computability and the complexity of various definitions of spectral radii for sets of matrices. We show that the joint and generalized spectral radii of two integer matrices are not approximable in polynomial time, and that two related quantities—the lower spectral radius and the largest Lyapunov exponent—are not algorithmically approximable.This work was completed while Blondel was visiting Tsitsiklis at MIT. This research was supported by the ARO under Grant DAAL-03-92-G-0115. 相似文献
10.
对一类非线性控制系统的输出调节问题,首先通过推广的精确线性化方法,将其转化为一类特殊的受扰线性控制系统对非线性系统的跟踪问题,然后利用可解性的概念解决了该问题,得到了非线性系统输出调节问题的局部和全局的结果。 相似文献