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Journal articles on the topic 'Two component sytem'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Ravikumar, Sambandam, Soon-Ho Hong, and Ik-Keun Yoo. "Heavy Metal Detection and Removal in Artificial Wastewater Using Two-Component System Based Recombinant Bacteria." Korean Journal of Microbiology 48, no. 3 (September 30, 2012): 187–91. http://dx.doi.org/10.7845/kjm.2012.039.

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2

KADANTSEVA, E. P., A. S. SHUMOVSKY, and V. I. YUKALOV. "SUPER-RADIATION IN THE TWO-COMPONENT TWO-LEVEL SYSTEM." International Journal of Modern Physics B 02, no. 02 (April 1988): 255–64. http://dx.doi.org/10.1142/s0217979288000196.

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An exact hierarchy of equations for atomic averages is constructed for a multicomponent super-radiative system. By an example of a two-component system it is shown that the correlations between components arising from the interaction with a common field of radiation change the process qualitatively in comparison with the case of two independent components. In particular, two successive super-radiation pulses may appear in the system that initially had only one excited component.

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3

PHAM, T., and N. TURKKAN. "RELIABILITY DESIGN FOR TWO-COMPONENT SYSTEMS WITH GAMMA-DISTRIBUTED COMPONENTS." International Journal of Reliability, Quality and Safety Engineering 03, no. 03 (September 1996): 203–15. http://dx.doi.org/10.1142/s0218539396000144.

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The design of a system, for reliability purposes, often requires the exact expression of its reliability function, which, however, is seldom available in closed form. Approximate methods are non-optimal and could even lead to errors. For two-component systems, with independent Gamma-distributed components, it is shown here that we can accurately determine the second component, within various configurations, when the first component is supposed known. Both classical and Bayesian approaches are considered.

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4

Chang, Caren, and Richard C. Stewart. "The Two-Component System." Plant Physiology 117, no. 3 (July 1, 1998): 723–31. http://dx.doi.org/10.1104/pp.117.3.723.

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5

Li, YanLing, GenQi Xu, and Hao Chen. "Analysis of two components parallel repairable degenerate system with vacation." AIMS Mathematics 6, no. 10 (2021): 10602–19. http://dx.doi.org/10.3934/math.2021616.

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<abstract><p>This article studies a parallel repairable degradation system with two similar components and a repairman who can take a single vacation. Suppose that the system consists of two components that cannot be repaired "as good as new" after failures; when the repairman has a single vacation, the fault component of system may not be repaired immediately, namely, if a component fails and the repairman is on vacation, the repair of the component will be delayed, if a component fails and the repairman is on duty, the fault component can be repaired immediately. Under these assumptions, a replacement policy $ N $ based on the failed times of component 1 is studied. The explicit expression of the system average cost rate $ C(N) $ and the optimal replacement policy $ N^{\ast} $ by minimizing the $ C(N) $ are obtained, which means the two components of the system will be replaced at the same time if the failures of component 1 reach $ N^{\ast} $. To show the advantage of a parallel system, a replacement policy $ N $ of the cold standby system consisting of the two similar components is also considered. The numerical results of both systems are given by the numerical analysis. The optimal replacement policy $ N^* $ for both systems are obtained. Finally, the comparison of numerical results shows the advantages of the parallel system.</p></abstract>

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6

Benabdallah, Assia, Michel Cristofol, Patricia Gaitan, and Masahiro Yamamoto. "Inverse problem for a parabolic system with two components by measurements of one component." Applicable Analysis 88, no. 5 (May 2009): 683–709. http://dx.doi.org/10.1080/00036810802555490.

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7

Han, Zhong, and Yong Chen. "Bright-Dark Mixed N-Soliton Solution of Two-Dimensional Multicomponent Maccari System." Zeitschrift für Naturforschung A 72, no. 8 (August 28, 2017): 745–55. http://dx.doi.org/10.1515/zna-2017-0133.

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AbstractBased on the KP hierarchy reduction method, we construct the general bright-dark mixed N-soliton solution of the two-dimensional (2D) (M+1)-component Maccari system comprised of M-component short waves (SWs) and one-component long wave (LW) with all possible combinations of nonlinearities. We firstly consider two types of mixed N-soliton solutions (two-bright-one-dark and one-bright-two-dark solitons in SW components) to the (3+1)-component Maccari system in detail. Then by extending our analysis to the (M+1)-component Maccari system, its general m-bright-(M–m)-dark mixed N-soliton solution is obtained. The formula obtained also contains the general all-bright and all-dark N-soliton solutions as special cases. For the two-bright-one-dark mixed soliton solution of the (3+1)-component Maccari system, it can be shown that solioff excitation and solioff interaction take place in the two SW components supporting bright solitons, whereas the SW component supporting dark solitons and the LW component possess V-type solitary and interaction.

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8

Hajeeh, Mohammed. "Performance of Two-Component Systems with Imperfect Repair." International Journal of Operations Research and Information Systems 1, no. 2 (April 2010): 50–63. http://dx.doi.org/10.4018/joris.2010040104.

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Operational systems deteriorate over time and eventually fail by the failure of one or more of their components. Failed components are either replaced or repaired, and replacement is usually expensive. This article examines the behavior of repairable systems with imperfect repair, where a failed component is repaired once or more depending on factors such as repair cost, level of deterioration, and criticality of the component. When these systems are subjected to a customer use environment, their performance must endure different conditions. In imperfect repair, the performance of the system lessens after each failure. Three models of a two-component system studied are the series, parallel, and standby configurations, and the components are identical and independent. A closed form analytical expression for steady state operational probability is derived for different configurations under exponential distribution time to failure and repair time. Two examples are then discussed thoroughly.

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9

Klinger, L. "Surface evolution in two-component system." Acta Materialia 50, no. 13 (August 2002): 3385–95. http://dx.doi.org/10.1016/s1359-6454(02)00141-6.

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10

Devyatisil’nyi, A. S., and K. A. Chislov. "A gravimetric two-component inertial system." Measurement Techniques 51, no. 2 (February 2008): 120–23. http://dx.doi.org/10.1007/s11018-008-9016-2.

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11

Hasanov, A. A. "DETERMINATION OF SELECTIVITY AND MASS TRANSFER IN LIQUID-PHASE EXTRACTION FOR BUTYL GLYCOL-WATER-ISOPROPYL ETHER SYSTEM." Azerbaijan Chemical Journal, no. 4 (December 12, 2020): 17–21. http://dx.doi.org/10.32737/0005-2531-2020-4-17-21.

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The problems of phase equilibrium, the equilibrium distribution of a component between phases are considered, and the distribution coefficient is determined in two versions. A formula for determining the selectivity coefficient is obtained, equations relating the compositions of coexisting phases, by equating the activities in these phases, Margules constants are found. Based on the given content of the components, the numerical values of (Margules constant for A component in solvent S) and (Margules constant for S component in solvent A) were found Using the Margules equation for ternary systems, the activity coefficients of components A and B are determined in two phases. The experimentally obtained values of the molar fractions of each of the three components, responsible to different points of the binodal curve, the corresponding activity coefficients of component B, and also calculated on these coefficients of the activity values

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12

Kokoschka, Siegfried. "Advantage of 4-components system and its application to photometer." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 78, Appendix (1994): 55–62. http://dx.doi.org/10.2150/jieij1980.78.appendix_55.

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13

Fedosin, Sergey G. "Two Components of the Macroscopic General Field." Reports in Advances of Physical Sciences 01, no. 02 (June 2017): 1750002. http://dx.doi.org/10.1142/s2424942417500025.

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The general field, containing all the macroscopic fields in it, is divided into the mass component, the source of which is the mass four-current, and the charge component, the source of which is the charge four-current. The mass component includes the gravitational field, acceleration field, pressure field, dissipation field, strong interaction and weak interaction fields, other vector fields. The charge component of the general field represents the electromagnetic field. With the help of the principle of least action we derived the field equations, the equation of the matter’s motion in the general field, the equation for the metric, the energy and momentum of the system of matter and its fields, and calibrated the cosmological constant. The general field components are related to the corresponding vacuum field components so that the vacuum field generates the general field at the macroscopic level.

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14

Fischer, B., and H. Weber. "Two attentional components for two purposes." Behavioral and Brain Sciences 20, no. 4 (December 1997): 770–71. http://dx.doi.org/10.1017/s0140525x97231626.

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Inappropriate saccades are prevented by fixation and by voluntary attention. The fixation system inhibits the saccade system. Like monkeys without a fixation system, humans with a weak fixation system produce many express saccades and cannot suppress prosaccades in an antisaccade task. With permanent attention to a peripheral location only a few express saccades to a stimulus at this location can be elicited: the sustained component of attention acts like fixation. When attention is captured by a precue, more express saccades are obtained: the stimulus-driven component of attention facilitates saccade generation. If the cue correctly indicates the direction for an antisaccade error rate and latencies are increased.

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15

Kox, L. F. F. "A small protein that mediates the activation of a two-component system by another two-component system." EMBO Journal 19, no. 8 (April 17, 2000): 1861–72. http://dx.doi.org/10.1093/emboj/19.8.1861.

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16

GRUNDY, JOHN. "MULTI-PERSPECTIVE SPECIFICATION, DESIGN AND IMPLEMENTATION OF SOFTWARE COMPONENTS USING ASPECTS." International Journal of Software Engineering and Knowledge Engineering 10, no. 06 (December 2000): 713–34. http://dx.doi.org/10.1142/s0218194000000341.

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Current approaches to component-based systems engineering tend to focus on low-level software component interface design and implementation. This often leads to the development of components whose services are hard to understand and combine, make too many assumptions about other components they can be composed with and component documentation that is too low-level. Aspect-oriented component engineering is a new methodology that uses a concept of different system capabilities ("aspects") to categorise and reason about inter-component provided and required services. It supports the identification, description and reasoning about high-level component functional and non-functional requirements grouped by different systemic aspects, and the refinement of these requirements into design-level software component service implementation aspects. Aspect information is used to help implement better component interfaces and to encode knowledge of a component's capabilities for other components, developers and end users to access. We describe and illustrate the use of aspect-oriented component engineering techniques and notations to specify, design and implement software components, report on some basic tool support, and our experiences using the approach to build some complex, component-based software systems.

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17

Giorgashvili, Levan, and Ketevan Skhvitaridze. "Solution of a Nonclassical Problem of Oscillation of Two-Component Mixtures." Georgian Mathematical Journal 13, no. 1 (March 1, 2006): 35–53. http://dx.doi.org/10.1515/gmj.2006.35.

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Abstract A general representation of solutions by six metaharmonic functions is obtained for a system of homogeneous equations of oscillation of two-component mixtures. The boundary value problem of oscillation of two-component mixtures is investigated when the normal components of partial displacement vectors and the tangent components of partial rotation vectors are given on the boundary. Uniqueness theorems of the considered problem are proved. Solutions are obtained in terms of absolutely and uniformly convergent series.

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18

Klinger, Leonid. "Grain Boundary Grooving in Two Component System." Defect and Diffusion Forum 216-217 (February 2003): 197–206. http://dx.doi.org/10.4028/www.scientific.net/ddf.216-217.197.

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19

Muraviev, E. V. "Optimization of Two-Component Nuclear Power System." Journal of Physics: Conference Series 1475 (March 2020): 012003. http://dx.doi.org/10.1088/1742-6596/1475/1/012003.

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20

Gurzadian, G. A., and Yervant Terzian. "Two-component velocity system of planetary nebulae." Astronomical Journal 101 (May 1991): 1752. http://dx.doi.org/10.1086/115802.

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21

Lee, Ho Yong, Seong Ryong Nam, and Jong-In Hong. "Microtubule Formation Using Two-Component Gel System." Journal of the American Chemical Society 129, no. 5 (February 2007): 1040–41. http://dx.doi.org/10.1021/ja0676197.

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22

KIM, KYUNGMEE O., and WAY KUO. "TWO-LEVEL BURN-IN FOR RELIABILITY AND ECONOMY IN REPAIRABLE SERIES SYSTEMS HAVING INCOMPATIBILITY." International Journal of Reliability, Quality and Safety Engineering 11, no. 03 (September 2004): 197–211. http://dx.doi.org/10.1142/s0218539304001464.

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When a system is assembled from components, incompatibility often occurs as a result of the assembly process. The ability to quantify incompatibility is very important for making burn-in decisions because the goal of system burn-in is to minimize the incompatibility factor. In the past, incompatibility has been only partially represented in the system prediction models because it was assumed that assembly had no effect on the components. This paper presents a more accurate model for system prediction by allowing for the possibility that, in some cases, assembly adversely affects the components. After applying a superposition of delayed renewal processes and a nonhomogeneous Poisson process for modeling times between system failures, we derive and analyze the effects of component and system burn-in on the system cost and performance. Examples are included to demonstrate how to determine optimal component and system burn-in times simultaneously based on an equivalent problem formation and nonlinear programming.

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23

Catanzaro, G., M. Gangi, M. Giarrusso, M. Munari, and F. Leone. "HD 226766: a hierarchical SB3 system with two twin Am stars." Monthly Notices of the Royal Astronomical Society 487, no. 1 (May 14, 2019): 919–27. http://dx.doi.org/10.1093/mnras/stz1312.

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ABSTRACT In this paper, we present a detailed revision of the orbital parameters and the first quantitative abundance analysis of the spectroscopic triple system HD 226766. By means of a simultaneous fit of the radial velocities of all the three components, we derived precise orbital parameters for the system, in particular inner pair has P(d) = 31.9187 ± 0.0001, e = 0.28 ± 0.01, and MA/MB = 1.03 ± 0.03, while the C component orbits around the inner pair with a period of P(d) = 1615 ± 59 in a very eccentric orbit (e = 0.54 ± 0.11). From the fit of the Hβ and Hα profiles, we determined the effective temperatures and surface gravities of each component of the inner pair: Teff = 8600 ± 500 K and log g = 3.8 ± 0.2 for HD 226766 A and Teff = 8500 ± 400 K and log g = 4.0 ± 0.2 for HD 226766 B. In the hypothesis that component C is a main sequence star (log g = 4.0) we derived Teff = 8000 ± 500 K. Rotational velocities have been estimated by modeling the profiles of metallic lines: v sin i = 13 ± 1 km s−1 for inner pair and v sin i = 150 ± 20 km s−1 for the C component. We find that the inner pair is heterogeneous from the point of view of the chemical composition: both stars are very similar and show chemical anomalies typical of Am stars. With some hypothesis about the masses of the components, we estimated the orbital inclination angle for the inner binary, i = (47 ± 1)○, and for the outer orbit, i = (54 ± 19)○.

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24

Girardin, Léo. "Two components is too simple: an example of oscillatory Fisher–KPP system with three components." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 150, no. 6 (September 24, 2019): 3097–120. http://dx.doi.org/10.1017/prm.2019.46.

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AbstractIn a recent paper by Cantrell et al. [9], two-component KPP systems with competition of Lotka–Volterra type were analyzed and their long-time behaviour largely settled. In particular, the authors established that any constant positive steady state, if unique, is necessarily globally attractive. In the present paper, we give an explicit and biologically very natural example of oscillatory three-component system. Using elementary techniques or pre-established theorems, we show that it has a unique constant positive steady state with two-dimensional unstable manifold, a stable limit cycle, a predator–prey structure near the steady state, periodic wave trains and point-to-periodic rapid travelling waves. Numerically, we also show the existence of pulsating fronts and propagating terraces.

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25

Giorgashvili, Levan, and Ketevan Skhvitaridze. "Problems of Statics of Two-Component Elastic Mixtures." gmj 12, no. 4 (December 2005): 619–35. http://dx.doi.org/10.1515/gmj.2005.619.

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Abstract A general representation of solutions by six harmonic functions is obtained for a system of homogeneous equations of statics of two-component mixtures. The problems are investigated when the normal components of partial displacement vectors and the tangent components of partial rotation vectors are given on the boundary. Uniqueness theorems are proved. Solutions are obtained in terms of absolutely and uniformly convergent series.

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26

Rouvière, P. E., and R. S. Wolfe. "Component A3 of the methylcoenzyme M methylreductase system of Methanobacterium thermoautotrophicum delta H: resolution into two components." Journal of Bacteriology 171, no. 9 (1989): 4556–62. http://dx.doi.org/10.1128/jb.171.9.4556-4562.1989.

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27

Zverev, V. A., Ramin Khoi, and T. V. Tochilina. "Linearization of the relationship of the displacements of the components in a two-component variable-magnification system." Journal of Optical Technology 70, no. 11 (November 1, 2003): 794. http://dx.doi.org/10.1364/jot.70.000794.

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28

YAN, MU-LIN, and BAO-HENG ZHAO. "QUANTUM INTEGRABLE SYSTEM WITH MULTI-COMPONENTS IN TWO DIMENSIONS." Modern Physics Letters B 16, no. 23n24 (October 20, 2002): 871–83. http://dx.doi.org/10.1142/s021798490200441x.

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A quantum N-body problem with 2-component in (2 + 1) dimensions deduced from an integrable model in (2 + 1) dimensions is investigated. The Davey–Stewartson 1 (DS1) system9 is an integrable model in two dimensions. A quantum DS1 system with 2 color components in two dimensions has been formulated. This two-dimensional problem has been reduced to two one-dimensional many-body problems with 2 color components. The solutions of the two-dimensional problem under consideration has been constructed from the resulting problems in one dimension. For the latter with δ-function interactions and being solved by the Bethe–Yang ansatz, we introduce symmetrical and anti-symmetrical Young operators of the permutation group and obtain the exact solutions for the quantum DS1 system. The application of the solutions is discussed.

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29

Munoli, S. B., and Rohit R. Mutkekar. "Estimation of Reliability for a Two Component Survival Stress-Strength Model." International Journal of Quality, Statistics, and Reliability 2011 (August 18, 2011): 1–8. http://dx.doi.org/10.1155/2011/721962.

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The reliability function for a parallel system of two identical components is derived from a stress-strength model, where failure of one component increases the stress on the surviving component of the system. The Maximum Likelihood Estimators of parameters and their asymptotic distribution are obtained. Further the Maximum Likelihood Estimator and Bayes Estimator of reliability function are obtained using the data from a life-testing experiment. Computation of estimators is illustrated through simulation study.

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30

Maaroufi, Ghofrane, Anis Chelbi, Nidhal Rezg, and Ait-Kadi Daoud. "A nearly optimal inspection policy for a two-component series system." Journal of Quality in Maintenance Engineering 21, no. 2 (May 11, 2015): 171–85. http://dx.doi.org/10.1108/jqme-11-2013-0074.

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Purpose – The purpose of this paper is to determine a nearly optimal inspection sequence for a series system consisting of two components subject to gradual deterioration and whose failures are not self-announcing and can be detected only through inspection. Design/methodology/approach – The problem is tackled in the context of condition-based maintenance (CBM) with a maintenance model in the class of the control-limit policies for which the maintenance decision is made following inspection by comparison of the deterioration level to critical thresholds. A mathematical model is developed to express the total expected cost per time unit as a function of the inspection instants. Findings – For any given series system composed of two components with known critical deterioration threshold levels, and for any given set of costs related to inspection, inactivity due to failure, and preventive and corrective replacements of each component, a nearly optimal inspection sequence of the system is derived such as the total expected cost is reduced. Research limitations/implications – Due to the complexity of the cost model with the inspection instants (×1, ×2, ×3, …) being the decision variables, it has not been possible to derive the optimal solution. A quasi-optimal sequence of inspection times is derived along with the corresponding total average cost per time unit. Practical implications – In many practical situations in which CBM is implemented, a tradeoff between inspection costs and inactivity and replacement costs has to be balanced when determining the intervals between successive inspections at which the degradation level of the components should be assessed and compared to predetermined critical threshold levels. Inspecting too often would increase inspection costs but in the same time it would also increase the probability to avoid a failure and end up with a preventive replacement, whereas not inspecting often enough would increase the probability to end up with a failure increasing replacement and inactivity costs. Originality/value – While the inspection problem has been largely treated for single component systems, inspection policies become much more complex when considering multi-component systems. A two-component series system is considered in this paper.

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31

Yan, Shaohua, Xian Tao, and De Xu. "High-precision robotic assembly system using three-dimensional vision." International Journal of Advanced Robotic Systems 18, no. 3 (May 1, 2021): 172988142110270. http://dx.doi.org/10.1177/17298814211027029.

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The design of a high-precision robot assembly system is a great challenge. In this article, a robotic assembly system is developed to assemble two components with six degree-of-freedoms in three-dimensional space. It consists of two manipulators, a structured light camera which is mounted on the end-effector aside component A to measure the pose of component B. Firstly, the features of irregular components are extracted based on U-NET network training with few labeled images. Secondly, an algorithm is proposed to calculate the pose of component B based on the image features and the corresponding three-dimensional coordinates on its ellipse surface. Thirdly, the six errors including two position errors and one orientation error in image space, and one position error and two orientation errors in Cartesian space are computed to control the motions of component A to align with component B. The hybrid visual servoing method is used in the control system. The experimental results verify the effectiveness of the designed system.

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32

BARROS, ANNE, ANTOINE GRALL, and CHRISTOPHE BÉRENGUER. "MAINTENANCE POLICIES FOR A TWO-UNITS SYSTEM: A COMPARATIVE STUDY." International Journal of Reliability, Quality and Safety Engineering 09, no. 02 (June 2002): 127–49. http://dx.doi.org/10.1142/s0218539302000718.

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This paper considers the age-based maintenance of a two-identical components system with economic dependences. Two existing approaches are presented and compared. One is a maintenance policy of (N,n)-type. It is very close to the optimal policy among all possible policies but difficult to optimize: Policy Iteration Algorithm is needed. The aim of the paper is to investigate if there are cases for which a simpler policy than those of (N,n)-type can be sufficient in terms of maintenance cost. A second approach proposed in literature (derived from the time-based block replacement one) is simpler but not sufficient in any situations. Some numerical experiments and an analysis of the stochastic behavior of the two-identical components system allows us to propose a third policy (Policy P). This third maintenance plan is simplified from the second one. It compensates for its weak point which is to be very expensive when the cost of replacement for one component is close to the cost of replacement for both components. Moreover it is possible to generalize this third policy from a two-identical components system to a n-identical components system. The performances analysis of the policy is based on numerical experiments.

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33

Formetta, G., R. Rigon, J. L. Chávez, and O. David. "Modeling shortwave solar radiation using the JGrass-NewAge system." Geoscientific Model Development 6, no. 4 (July 5, 2013): 915–28. http://dx.doi.org/10.5194/gmd-6-915-2013.

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Abstract. This paper presents two new modeling components based on the object modeling system v3 (OMS3) for the calculation of the shortwave incident radiation (Rsw↓) on complex topography settings, and the implementation of several ancillary tools. The first component, NewAGE-SwRB, accounts for elevation slope, aspect, shadow of the sites, and uses suitable parameterization for obtaining the cloudless irradiance. A second component, NewAGE-DEC-MOD's is implemented to estimate the irradiance reduction due to the presence of clouds according to three parameterizations. To obtain a working modeling composition that is comparable with ground data at measurement stations the two components are connected to a kriging component. With the help of an additional component, NewAGE-V (verification package), the performance of modeled (Rsw↓) is quantitatively evaluated. The two components (and the various parameterizations they contain) are tested using the data from three basins, and some simple verification tests were carried out to assess the goodness of the methods used. Moreover, a raster mode test is performed in order to show the capability of the system in providing solar radiation raster maps. The components are part of a larger system, JGrass-NewAGE, their input and outputs are geometrical objects immediately displayed in a geographical information system (GIS). They can be used seamlessly with the various modeling solutions available in JGrass-NewAGE for the estimation of long wave radiation, evapotranspiration, and snow melting, as well as standalone components to just estimate shortwave radiation for various uses. The modularity of the approach leads to more accurate physical-statistical studies aimed to assess in depth the components' performances and extends their results spatially, without the necessity of recoding any part of the component.

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34

Malki, Zouheir, Daoud Ait-Kadi, and Mohamed-Salah Ouali. "Age replacement policies for two-component systems with stochastic dependence." Journal of Quality in Maintenance Engineering 21, no. 3 (August 10, 2015): 346–57. http://dx.doi.org/10.1108/jqme-03-2014-0013.

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Purpose – The purpose of this paper is to investigate age replacement policies for two-component parallel system with stochastic dependence. The stochastic dependence considered, is modeled by a one-sided domino effect. The failure of component 1 at instant t may induce the failure of component 2 at instant t+τ with probability p 1→2. The time delay τ is a random variable with known probability density function h p 1→2 (.). The system is considered in a failed state when both components are failed. The proposed replacement policies suggest to replace the system upon failure or at age T whichever occurs first. Design/methodology/approach – In the first policy, costs and durations associated with maintenance activities are supposed to be constant. In the second replacement policy, the preventive replacement cost depends on the system’s state and age. The expected cost per unit of time over an infinite span is derived and numerical examples are presented. Findings – In this paper and especially in the second policy, the authors find that the authors can get a more economical policy if the authors consider that the preventive replacement cost is not constant but depends on T. Originality/value – In this paper, the authors take into account of the stochastic dependence between system components. This dependence affects the global reliability of the system and replacement’s periodicity. It can be used to measure the performance of the system et introduced into design phase of the system.

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35

Campeanu, Gabriel, and Mehrdad Saadatmand. "A Two-Layer Component-Based Allocation for Embedded Systems with GPUs." Designs 3, no. 1 (January 19, 2019): 6. http://dx.doi.org/10.3390/designs3010006.

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Component-based development is a software engineering paradigm that can facilitate the construction of embedded systems and tackle its complexities. The modern embedded systems have more and more demanding requirements. One way to cope with such a versatile and growing set of requirements is to employ heterogeneous processing power, i.e., CPU–GPU architectures. The new CPU–GPU embedded boards deliver an increased performance but also introduce additional complexity and challenges. In this work, we address the component-to-hardware allocation for CPU–GPU embedded systems. The allocation for such systems is much complex due to the increased amount of GPU-related information. For example, while in traditional embedded systems the allocation mechanism may consider only the CPU memory usage of components to find an appropriate allocation scheme, in heterogeneous systems, the GPU memory usage needs also to be taken into account in the allocation process. This paper aims at decreasing the component-to-hardware allocation complexity by introducing a two-layer component-based architecture for heterogeneous embedded systems. The detailed CPU–GPU information of the system is abstracted at a high-layer by compacting connected components into single units that behave as regular components. The allocator, based on the compacted information received from the high-level layer, computes, with a decreased complexity, feasible allocation schemes. In the last part of the paper, the two-layer allocation method is evaluated using an existing embedded system demonstrator; namely, an underwater robot.

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Moakedi, Hamid, Mohammad Seved Seyedhosseini, and Kamran Shahanaghi. "A block-based inspection policy for a multi-component system subject to two failure modes with stochastic dependence." Journal of Quality in Maintenance Engineering 25, no. 2 (May 7, 2019): 314–39. http://dx.doi.org/10.1108/jqme-05-2018-0044.

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Purpose The purpose of this paper is to model a block-based inspection policy for a multi-component system with stochastic dependence. Some components may develop a hidden failure, an occurrence of which neither stops the system nor accelerates the other components’ deterioration. On the other hand, other components may experience three states: healthy, defective and revealed failures. Any revealed failure of each component not only stops the system but also generates a shock to all the other ones, which increases their occurrence rate of hidden, defect and revealed failures. Design/methodology/approach A block-based inspection policy is considered to take advantage of economic dependence as follows. In addition to the periodic inspections, the system is also inspected at revealed failures’ moments of each component to detect and fix both defects and hidden failures on all the other components. To calculate the expected total cost, the recursive equations for the required expected values is first mathematically derived. Then, due to computational complexity, an efficient Monte Carlo simulation algorithm is designed to calculate the expected values. Findings The proposed approach is illustrated through a numerical example, and the optimal periodic inspection interval over a finite time horizon is obtained via minimization of the expected total cost. Finally, the correctness of the results is validated by conducting sensitivity analysis. Originality/value Planning an appropriate inspection policy over a finite time horizon becomes more complicated when considering a multi-component system because different units may experience different failure modes with stochastic dependence.

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Opeiko, O. F. "CONTROL SYNTHESIS FOR TWO LOOPS DISCRET SYSTEM." «System analysis and applied information science», no. 1 (June 12, 2018): 22–26. http://dx.doi.org/10.21122/2309-4923-2018-1-22-26.

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The aim of this paper is the linear synthesis of two loops SISO systems with discreet time proportional integral (PI) controllers. This linear synthesis is dedicated for the systems with plant parameters uncertainty. The synthesis is based on the time scale method, providing the separate slow and fast components of the control low. The PI- controller parameters calculation is based on the modal control and plant model reduction. The conditions carried out for the each control loop dynamics still similar to the second order one. The discrete time microcontroller based numerical control restricts the stability domain of the system and each control loop in it. The stability domain of each loop is the round on the complex plane with radius, depending on the time period. Each inner loop must be more fast, then each outer one. Hence, in the outer loop the time period, required for the PI controller reaction computation, can be more then in the inner loop. This PI- controller parameter calculation method is approximate, and it is efficient for the systems, whose dynamics contains the slow and fast components. In particular, the electrical drives control systems contain the fast electromagnetic component and the slow mechanical part. The effectiveness of this method is illustrated by the example and simulation.

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Yamada, S., H. Nakamura, and Y. Shiro. "2SB03 PAS domain in two-component regulatory system." Seibutsu Butsuri 45, supplement (2005): S19. http://dx.doi.org/10.2142/biophys.45.s19_1.

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Liu, Qian, Won‐Sik Yeo, and Taeok Bae. "The SaeRS Two‐Component System of Staphylococcus aureus." Genes 7, no. 10 (October 3, 2016): 81. http://dx.doi.org/10.3390/genes7100081.

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Kuehn, Meta. "The E. coli BaeSR two-component regulatory system." Trends in Microbiology 10, no. 12 (December 2002): 553. http://dx.doi.org/10.1016/s0966-842x(02)02484-8.

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Blandinskiy, V. "Neutron balance in two-component nuclear energy system." Kerntechnik 84, no. 4 (September 16, 2019): 346–50. http://dx.doi.org/10.3139/124.190030.

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Slanina, František, and Yi-Cheng Zhang. "Capital flow in a two-component dynamical system." Physica A: Statistical Mechanics and its Applications 272, no. 1-2 (October 1999): 257–68. http://dx.doi.org/10.1016/s0378-4371(99)00272-1.

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Chen, Yong, Hongjun Gao, and Hua Luo. "On the stochastic two-component b-family system." Stochastic Analysis and Applications 34, no. 6 (September 2016): 1025–44. http://dx.doi.org/10.1080/07362994.2016.1199966.

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Groisman, Eduardo A. "The Pleiotropic Two-Component Regulatory System PhoP-PhoQ." Journal of Bacteriology 183, no. 6 (March 15, 2001): 1835–42. http://dx.doi.org/10.1128/jb.183.6.1835-1842.2001.

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Nam, Seong Ryong, Ho Yong Lee, and Jong-In Hong. "Self-assembled organogels based on two-component system." Tetrahedron 64, no. 46 (November 2008): 10531–37. http://dx.doi.org/10.1016/j.tet.2008.08.089.

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Kim, Jungmook, and Jin Jeon. "Cold Signaling via the Two-Component Signaling System." Molecular Plant 6, no. 1 (January 2013): 15–17. http://dx.doi.org/10.1093/mp/sss151.

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Shiue, Shin-Guo. "Two-optical-component method for designing zoom system." Optical Engineering 34, no. 6 (June 1, 1995): 1826. http://dx.doi.org/10.1117/12.203091.

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Kolek, Andrzej. "Voltage distribution in a two-component random system." Physical Review B 53, no. 21 (June 1, 1996): 14185–95. http://dx.doi.org/10.1103/physrevb.53.14185.

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Theodorou, Marina, C. "Histamine in two component system-mediated bacterial signaling." Frontiers in Bioscience 17, no. 1 (2012): 1108. http://dx.doi.org/10.2741/3976.

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Yeh, K. "A Cyanobacterial Phytochrome Two-Component Light Sensory System." Science 277, no. 5331 (September 5, 1997): 1505–8. http://dx.doi.org/10.1126/science.277.5331.1505.

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