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Order Systems (order + system)
Selected AbstractsBook review: Color Ordered, A Survey of Color Order Systems from Antiquity to the PresentCOLOR RESEARCH & APPLICATION, Issue 5 2008Ellen C. CarterArticle first published online: 4 AUG 200 No abstract is available for this article. [source] Adaptive unknown input observer approach for aircraft actuator fault detection and isolationINTERNATIONAL JOURNAL OF ADAPTIVE CONTROL AND SIGNAL PROCESSING, Issue 1 2007Dan Wang Abstract In this paper, an adaptive unknown input observer (UIO) approach is developed to detect and isolate aircraft actuator faults. In a multiple-model scheme, a bank of parallel observers are constructed, each of which is based on a model that describes the system in the presence of a particular actuator fault. The observers are constructed based on a modified form of the standard UIO to generate fault-dependant residual signals, such that when a model matches the system, the residual signal will be zero. Otherwise, the residual will be definitely non-zero and governed uniquely by the faulty signal. For locked actuators and loss of actuator effectiveness, in which the locked position and the reduced effectiveness are additional unknowns, we develop an adaptive scheme to estimate these unknown parameters. To the best of our knowledge, this is the first adaptive UIO presented. We prove that the proposed adaptive algorithms guarantee that both the residual signals and the estimation errors of the unknown parameters converge exponentially when a model matches the plant. By further designing a model-matching index, the fault can be isolated accurately. A condition for the approach is that for an nth order system, there must be n independent measurements available. This requirement limits the applicability of our proposed approach. The condition is certainly satisfied by all state-feedback control systems. However, for some other systems, extra efforts may be needed to increase the number of measurements. The method is applied to a linear model of the F-16 aircraft with controller. The results show that the approach is effective. Copyright © 2006 John Wiley & Sons, Ltd. [source] A Computerized Nursing Process Support System in BrazilINTERNATIONAL JOURNAL OF NURSING TERMINOLOGIES AND CLASSIFICATION, Issue 2003Maria da Graça Oliveira Crossetti BACKGROUND Hospital de Clinicas de Porto Alegre introduced the nursing process model as the basis for nursing practice at the hospital more than 20 years ago. A computerized nursing order system based on nursing diagnoses was introduced. The strategies used in the development of the system included establishment of Nursing Diagnosis Work Groups in 1998; systematic analysis of nursing processes based on the work of existing studies, the NANDA taxonomy in 1999; development and implementation of a data collection instrument to analyze the nursing diagnosis process; training of all nursing staff during 1999,2000; meetings between analysts and nursing staff to articulate the nursing process needs the system would be required to support; pilot implementation of the computerized nursing process system in the ICU in February 2000; and hospital-wide implementation in December 2000. The system supports nursing diagnoses and orders. It was developed in-house by the information systems group at the hospital and is implemented as an Oracle database accessed in client server mode over a Windows NT-based Ethernet network. The system is part of the hospital's larger clinical information management system. MAIN CONTENT POINTS The patient care module includes medical orders and nursing orders. On entering the nursing orders module, the user selects a patient and the system presents a list all current orders completed and pending. These orders can be examined, updated, and reprinted, and new daily nursing orders can also be input at this time. The "new order" screen provides the user with any previous orders to ensure consistency in nursing care. New nursing orders are prepared based on the patient history, physical exam, and daily evaluations. Required interventions are identified based on changes in the patient's "basic human needs." This process can be realized through two distinct paths through the nursing care module: one associated with diagnoses and the other with signs and symptoms. A nurse with more clinical experience and knowledge of diagnostic reasoning will opt to develop orders based on diagnoses. After the diagnosis and associated etiology is input, the system generates a list of possible interventions for selection. The duration and frequency of the intervention can then be specified and the order individualized to a patient's particular needs. Less experienced nurses and students will develop nursing orders based on a patient's signs and symptoms. The system generates a list of diagnoses, etiology, and associated basic human needs in response to the signs and symptoms input. The nurse selects the appropriate diagnoses and etiology and the system generates the list of nursing intervention options. Nurses following either path are required to confirm their orders. They then have the option of developing other orders for the same patient until all that patient's basic human needs have been addressed. The orders can be printed but also remain in the system for nursing staff to implement. CONCLUSIONS The application of systematic, evidence-based methods in nursing care results in improved quality of service that conforms to individual patients' basic human needs. [source] Cell Production and Workplace Innovation in Japan: Toward a New Model for Japanese Manufacturing?INDUSTRIAL RELATIONS, Issue 4 2002Katsuhide Isa This article investigates the current trend toward cell production and other workplace innovations in Japan using a large,scale sampling survey of manufacturing firms and in,depth interviews with four leading electrical and electronic establishments. The quantitative analysis reveals the correlation between the use of cell production and the ratio of female to male workers and production strategy variables, as well as the positive effect of cell production on operating profit rates and ordinary profit rates. The case studies reveal the following points: First, processes and organizations have been decentralized to the degree that individual workshops move toward taking primary responsibility for customer relations, production decisions, and delivery. Corporate headquarters increasingly play a coordinating rather than decision,making role. Second, firms have steadily implemented make,to,order systems by tightening links to suppliers and customers and developing new inventory and cost,control systems. Third, firms have started to implement more performance,based personnel practices. However, considerable variance among firms is observed in complementary changes, particularly personnel innovations. [source] Near optimal LQR performance for uncertain first order systemsINTERNATIONAL JOURNAL OF ADAPTIVE CONTROL AND SIGNAL PROCESSING, Issue 4 2004L. Luo Abstract In adaptive control, the objective is to provide stability and acceptable performance in the face of significant plant uncertainty. However, often there are large transients in the plant output and the control signal can become excessively large. Here, we consider the first order case with the plant parameters restricted to a compact set; we show how to design a (linear time-varying) adaptive controller which provides near optimal LQR performance. This controller is periodic with each period split into two parts: during the Estimation Phase, an estimate of the optimal control signal is formed; during the Control Phase, a suitably scaled estimate of this signal is applied to the system. We demonstrate the technique with a simulation and discuss the benefits and limitations of the approach. Copyright © 2004 John Wiley & Sons, Ltd. [source] Generalization of cluster treatment of characteristic roots for robust stability of multiple time-delayed systemsINTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL, Issue 14 2008Rifat Sipahi Abstract A new perspective is presented for studying the stability robustness of nth order systems with p rationally independent delays. It deploys a holographic mapping procedure over the delay space into a new coordinate system in order to achieve the objective. This mapping collapses the entire set of potential stability switching points on a manageably small number of hypersurfaces, which are explicitly defined in the new domain. This property considerably alleviates the problem, which is otherwise infinite dimensional, and therefore notoriously complex to handle. We further declare some unrecognized features of these switching hypersurfaces, that they are (a) encapsulated within a higher-dimensional cube with edges of length 2,, which we name the ,building block', and (b) the ,offspring' of this building block, which represent the secondary stability switchings, appear within the adjacent and identical building blocks (cubes) stacked up next to each other. The final outlook is an exclusive representation of stability for this general class of systems at any arbitrary point in the delay space. Two example case studies are also provided, which are not possible to analyze using any other methodology known to the authors. Copyright © 2007 John Wiley & Sons, Ltd. [source] Global continuation for first order systems over the half-line involving parametersMATHEMATISCHE NACHRICHTEN, Issue 8 2009Gilles EvéquozArticle first published online: 21 JUL 200 Abstract Let X be one of the functional spaces W1,p ((0, ,), ,N) or C01 ([0, ,), ,N), we study the global continuation in , for solutions (,, u, ,) , , × X × ,k of the following system of ordinary differential equations: where ,N = X1 , X2 is a given decomposition, with associated projection P: ,N , X1. Under appropriate conditions upon the given functions F and ,, this problem gives rise to a nonlinear Fredholm operator which is proper on the closed bounded subsets of , × X × ,k and whose zeros correspond to the solutions of the original problem. Using a new abstract continuation result, based on a recent degree theory for proper Fredholm mappings of index zero, we reduce the continuation problem to that of finding a priori estimates for the possible solutions (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Multidimensional second order systems with controls,ASIAN JOURNAL OF CONTROL, Issue 2 2010D. Bors Abstract In the paper, a nonlinear equation with decreasing mass is considered. Sufficient conditions for the existence of solutions on the interval [t1, t2] are proved. Moreover, theorem on the stability of system and the existence of optimal control are presented. The proofs of the main results are based on variational method. Copyright © 2010 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society [source] | ||||||||||