A Non-Normality Measure of the Condition Number for Monitoring and Control

1997 ◽  
Vol 119 (2) ◽  
pp. 217-222 ◽  
Author(s):  
Kunsoo Huh ◽  
Jeffrey L. Stein
Keyword(s):  
Optimal Control ◽  
Condition Number ◽  
Minimization Problem ◽  
Monitoring And Control ◽  
Proper Selection ◽  
Modal Structure ◽  
L2 Norm ◽  
And Control ◽  
Normality Measure ◽  
Selection Of

Because the behavior of the condition number can have highly steep and multi-modal structure, optimal control and monitoring problems based on the condition number cannot be easily solved. In this paper, a minimization problem is formulated for κ2(P), the condition number of an eigensystem (P) of a matrix in terms of the L2 norm. A new non-normality measure is shown to exist that guarantees small values for the condition number. In addition, this measure can be minimized by proper selection of controller and observer gains. Application to the design of well-conditioned controller and observer-based monitors is illustrated.

scholarly journals Integral approach of assessment of interaction level of stakeholders of construction enterprises

2021 ◽  
Vol 8 (11) ◽  
pp. 44-49
Author(s):  
Marusheva et al. ◽  
Keyword(s):  
Integrated System ◽  
Integral Approach ◽  
Direct Selection ◽  
Expert Assessment ◽  
Monitoring And Control ◽  
Construction Enterprise ◽  
Construction Enterprises ◽  
Integral Assessment ◽  
And Control ◽  
Selection Of

This article is devoted to issues of interaction of stakeholders of construction enterprises. First of all, the peculiarities of the construction industry are defined, which form additional requirements for the development of an integrated system for assessing interaction with stakeholders. Second, approaches to the formation of a register of potential stakeholders have been identified. A template for analysis has been developed, and individual examples are grouped by interaction directions. The methodology of identifying potential stakeholders by means of a three-level process of applying different versions of expert assessment methods in order to minimize their negative factor – subjectivity, is proposed. Methods of direct selection of experts and algorithms of their assessment are defined. Proposals to rank stakeholders according to their priority and potential result from their interaction with the construction enterprise have been developed. According to the integral assessment, ways of controlling the processes of interaction with stakeholders of different ranking levels are proposed, recommendations for building a further strategy for managing these processes are given. A system of modeling interaction between construction enterprises and stakeholders to ensure planning, organization, monitoring, and control processes in optimistic, realistic, and pessimistic scenarios has been created. Recommendations for further use of the methodology of integral assessment of the interaction of stakeholders of construction enterprises in practice are given.

ST22 and ST239 MRSA duopoly in Singaporean hospitals: 2006–2010

2012 ◽  
Vol 141 (1) ◽  
pp. 153-157 ◽  
Author(s):  
J. TEO ◽  
T. Y. TAN ◽  
P. Y. HON ◽  
W. LEE ◽  
T. H. KOH ◽  
...  
Keyword(s):  
Variable Number Tandem Repeat ◽  
Variable Number ◽  
Small Subset ◽  
Monitoring And Control ◽  
Data Compilation ◽  
Laboratory Surveillance ◽  
Mrsa Infection ◽  
The Individual ◽  
And Control ◽  
Selection Of

SUMMARYSurveillance is integral for the monitoring and control of infectious diseases. We conducted prospective laboratory surveillance of methicillin-resistantStaphylococcus aureus(MRSA) in five Singaporean public-sector hospitals from 2006 to 2010, using WHONET 5.6 for data compilation and analysis. Molecular profiling using multilocus variable-number tandem-repeat analysis, staphylococcal cassette chromosomemecclassification and multilocus sequence typing was performed for a random selection of isolates. Our results showed overall stable rates of infection and bacteraemia, although there was significant variance among the individual hospitals, with MRSA rates increasing in two smaller hospitals and showing a trend towards decreasing in the two largest hospitals. The proportion of blood isolates that are EMRSA-15 (ST22-IV) continued to increase over time, slowly replacing the multi-resistant ST239-III. A new MRSA clone – ST45-IV – is now responsible for a small subset of hospital infections locally. More effort is required in Singaporean hospitals in order to reduce the rates of MRSA infection significantly.

Control Organization: Survey and Application

2008 ◽  
Author(s):  
Ilan Rusnak
Keyword(s):  
Optimal Control ◽  
Motion Control ◽  
High Performance ◽  
Structure Design ◽  
Sensors And Actuators ◽  
Organization Problem ◽  
Control Configuration ◽  
Control Feedback ◽  
And Control ◽  
Selection Of

The issue of the organization of control and feedback can be subdivided into several subjects: i) Selection of performance objectives; ii) The control algorithms; iii) Selection of measured and manipulated variables; and iv) Feedback organization. In previous publication [1] partial survey of the issues above and a terminology for feedback and control organization has been presented, that is, not all issues and not all relevant disciplines have been covered. Namely, motion control and servo-regulator applications have been covered; however, aircraft control, missile autopilots and process control have been barely covered. The issues of: (i) Selection of measured variables (location of sensors) and manipulated variables (location of actuators) called as well as Input-Output Selection (IO); (ii) Control Structure Design (CSD); and (iii) Control Configuration selection (CC); had not been covered and are presented here. These issues are strictly proper sub-issues of the Control and Feedback organization problem. This paper extends the survey to additional disciplines and subjects. Thus this paper can be considered as part II and supplement of [1]. Using the definitions the problem of Control and Feedback Organization (CFO) is defined over the set theory within the well-established functional analysis and optimal control theories. The optimal control-feedback organization problem and the optimal simultaneous design of the system and feedback configuration problem are presented as open issues. This demonstrates the usefulness of the existence of a proper terminology and theory of the control-feedback organization problem and its extension and connection to design of sensors and actuators location. As an example the architecture generating property of the LQR metric is used to derive advanced high performance architecture for motion control applications.

The Selection of Performance Indices for Optimal Control Problems

1973 ◽  
Vol 95 (1) ◽  
pp. 24-27 ◽  
Author(s):  
R. L. Woods
Keyword(s):  
Optimal Control ◽  
Performance Index ◽  
Optimal Control Problems ◽  
Performance Indices ◽  
Proper Selection ◽  
Control Effort ◽  
Time Integral ◽  
Quadratic Index ◽  
Selection Of ◽  
A Performance

This paper investigates the proper selection of a performance index to satisfy a word statement of desired effect. A performance index formed as the time integral of Un is solved for various values of n. When viewed in this light, the classical quadratic index (n = 2) gives a seemingly arbitrary solution. From this investigation the true optimal control solution can be ascertained. For the different values of n, solutions for totally different performance can be obtained. Performance indices combining two effects of minimum control effort and minimum response error are also investigated. The differences of a summed combination and a multiplicative combination are studied.

scholarly journals Sistema de Monitoreo y Control Automatizado de Nivel para Contenedores de Líquidos no Corrosivos, de Uso Doméstico y Comercial

2019 ◽  
pp. 1-8
Author(s):  
Alejandro Báez-Ibarra ◽  
Mario Enríquez-Nicolás ◽  
Francisco Antonio Luna-Salinas ◽  
Guadalupe Rojas-Santos
Keyword(s):  
Control System ◽  
Execution Time ◽  
Technological Progress ◽  
Monitoring And Control ◽  
Monitoring And Control System ◽  
Commercial Use ◽  
Management Processes ◽  
The Cost ◽  
And Control ◽  
Selection Of

The automation of processes today is one of the present needs in society as a result of the inefficiency that results from carrying out certain tasks without mechanisms that optimize them, whether due to time, efficiency, and in general All the technological progress that we already have, these mechanisms have become obsolete. This document shows a response to this situation, specifically focused on liquid management processes, the implementation of a Level Automated Monitoring and Control System for non-corrosive containers for domestic and commercial use. The adequate selection of the components that make up this system will allow its easy accessibility, with respect to the cost that this implies, its structure will be designed in such a way that it minimizes the execution time, that integrates more than one control, and that its interface Be as friendly as possible with the operator. This allows it to be an easy-to-use system, greatly improving the response time in its realization, as well as it will allow to have a greater control in the capacity of the level of the containers reducing in this way the expenditure of liquids that can be arouse by some carelessness.

Computers for data, control and simulation

1988 ◽  
Vol 46 ◽  
pp. 920-921
Author(s):  
David C. Joy
Keyword(s):  
Personal Computers ◽  
Monitoring And Control ◽  
Data Logging ◽  
Data Logger ◽  
Operational Conditions ◽  
Data Control ◽  
The Many ◽  
And Control

Personal computers (PCs) are a powerful resource in the EM Laboratory, both as a means of automating the monitoring and control of microscopes, and as a tool for quantifying the interpretation of data. Not only is a PC more versatile than a piece of dedicated data logging equipment, but it is also substantially cheaper. In this tutorial the practical principles of using a PC for these types of activities will be discussed.The PC can form the basis of a system to measure, display, record and store the many parameters which characterize the operational conditions of the EM. In this mode it is operating as a data logger. The necessary first step is to find a suitable source from which to measure each of the items of interest. It is usually possible to do this without having to make permanent corrections or modifications to the EM.

Meriel Talbot and the Society for the Overseas Settlement of British Women, 1919–1937

2017 ◽  
Vol 10 (1) ◽  
pp. 32-52
Author(s):  
Bonnie White
Keyword(s):  
Domestic Service ◽  
Agricultural Workers ◽  
British Government ◽  
Early Failure ◽  
Proper Selection ◽  
Domestic Servants ◽  
Female Workers ◽  
Female Migrants ◽  
Post War ◽  
Selection Of

In 1917 the British government began making plans for post-war adjustments to the economy, which included the migration of surplus women to the dominions. The Society for the Overseas Settlement of British Women was established in 1920 to facilitate the migration of female workers to the dominions. Earlier studies have argued that overseas emigration efforts purposefully directed women into domestic service as surplus commodities, thus alleviating the female ‘surplus’ and easing economic hardships of the post-war period. This article argues that as Publicity Officer for the SOSBW, Meriel Talbot targeted women she believed would be ideal candidates for emigration, including former members of the Women's Land Army and affiliated groups. With the proper selection of female migrants, Talbot sought to expand work opportunities for women in the dominions beyond domestic service, while reducing the female surplus at home and servicing the connection between state and empire. Dominion authorities, whose demands for migrant labour vacillated between agricultural workers during the war years and domestic servants after 1920, disapproved of Talbot's efforts to migrate women for work in agriculture. Divergent policies led to the early failure of the SOSBW in 1923.

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