Closed-loop - Factbites

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Topic: Closed-loop

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In the News (Sun 15 Nov 09)

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	Open and closed loop control
		Closed loop systems are dedicated systems in that the microprocessor is permanently monitoring and controlling the environment, therefore cannot be used for other functions.
		In closed loop control, the same teacher would set a class work to do, then monitor their progress to make sure that it is done.
		The difference between open and closed loop control is:
	www.school-resources.co.uk /Open%20and%20Closed%20Loop%20Control.htm

	Closed Loop
		Closed loop systems are designed to distribute heated or chilled water throughout a designated area.
		Water temperatures in closed loops typically range from 42°F to 350°F and water velocities are usually two to five feet per second.
		Barclay Water Management, Inc. pays close attention to the chemistry of closed loop recirculating water systems because corrosion and microbiological fouling can severely impact heat exchange even in systems experiencing very little water loss.
	www.barclaywm.com /closed_loop.htm

	Ziegler-Nichols Closed Loop Tuning
		The Closed Loop method determines the gain at which a loop with proportional only control will oscillate, and then derives the controller gain, reset, and derivative values from the gain at which the oscillations are sustained and the period of oscillation at that gain.
		The Ziegler-Nichols Closed Loop method is one of the more common methods used to tune control loops.
		Ensure that the process is Òlined outÓ with the loop to be tuned in automatic with a gain low enough to prevent oscillation.
	users.aol.com /JohnShaw/znclosed.html

	Harrel Turnkey Extrusion Lines
		Close, closed loop control of sheet thickness, both in machine direction and in cross-machine profile.
		Close, closed loop control of both outside diameter and thickness of both the stem and the bump.
		Close, closed loop control of thickness of each individual layer, regardles of external factors.
	www.harrel.com /src/turnkey.html

	Closed Loop Traffic Signal Newsletter
		Closed loop systems are equipped with loop detectors (or other detection devices) at key points throughout the system which transmit data (number of cars) to a computer which is typically located in the borough hall.
		Closed loop systems can report detailed information back to a central computer that monitors the system’s operation.
		A closed loop system connects a series of traffic signals providing communications between the individual intersections.
	www.trafficpd.com /ClosedLoop.htm

	Deionization Systems - Closed Loop
		Closed loop systems become cost effective if the used or returned water quality is purer than the incoming city water quality.
		Closed loop systems can be designed to meet the same water quality requirements as standard exchange deionization systems.
		Closed loop systems can use exchange and in-house deionization to deionize your water.
	www.smithengineeringinc.com /deioncl.htm

	logistics consultants - closed loop logistics management
		Closed loop logistics management of pallet pools and layer pads contributes to a cleaner environment and at the same time is a cost-effective benefit for your company.
		Closed loop logistics is the process of reusing and replenishing packaging.
		Closed loop logistics also means that the cost of new packaging materials is significantly reduced.
	www.demes-logistics.co.uk

	Visy Closed Loop - Visy Closed Loop Global
		Visy Closed Loop’s experience and expertise is directed toward developing and implementing tailored closed loop programmes resulting in a wide range of benefits and savings in various industries.
		Closed Loop London Ltd. is a wholly owned UK subsiary company of Closed Loop Environmental Solutions Pty.
		The alliance with London Remade will enable Closed Loop London to focus on the development of comprehensive recycling supply chains incorporating the collection and reprocessing of recyclable materials and the procurement of recycled content and resource efficient products, working in partnership with a variety of end user markets.
	www.visyclosedloop.com /index.php?page=12

	Closed Loop Operation
		The main benefit of closed loop operation is the mixture is always close to the optimal setting.
		Closed loop operation is disabled by SW1 on the My16M.
		Currently the closed loop software is simple and only one target voltage can be specified for the O2 sensor.
	www.jefferies-au.org /My16M/Closed_Loop_Operation.html

	CLOSED LOOP THEORY FOR PLANET EARTH Sunday February 8, 2004
		They are the ultimate open loop but they think in their mind that dying is a way to get closer to God, so in their Mind they think they have found the Ultimate Closed Loop.
		Yes, but the closed loop they have found has torn a hole in the fabric of many other people's lives, so the loop they have found to solve THEIR PROBLEM is Evil because it comes at the cost of making so many open loops spawned off it.
		We did not take the "Closed Loop" and apply it to our government, our system of taxation, our welfare system, and to beat heck we have hung onto the gasoline powered engine like its God Almighty, when in fact it is one of the most offensive OPEN LOOPS WE HAVE!
	www.newpath4.com /faithgrandmaandapplepie.htm

	WATERJET CUTTING CLOSED LOOP
		Ebbco’s closed loop system chiller can be sized to remove heat from the catch tank overflow as well as cooling the hydraulics on the intensifier pump (see figure 2).
		One such water conditioning system is the closed loop system for the waterjet cutting industry.Waterjet cutting systems overflow water to the drain.
		However, from evaporation alone some make up water is needed Make up water enters the dirty side of the closed loop system and the TDS is controlled before it ever gets pumped back to the high-pressure pump.
	www.ebbcoinc.com /waterjet_cutting_closed_loop.htm

	electrical_network.html
		A circuit is a network that has a closed loop i.e.
		It can be as small as an integrated circuit on a silicon chip, or as large as an electricity distribution network.
		This flexibility allows an engineer to make a trade-off between simulation time and the precision of the results, something that is not easily done with the previous simulation technique.
	www.informationgenius.com /encyclopedia/e/el/electrical_network.html

	Closed-Loop Processing
		The closed loop approach includes the examination of the world in an effort to validate the world model and is thus appropriate for real-world environments in which feedback is necessary to validate agent actions.
		In this case, the loop is closed because feedback is required and there is a time window in which the feedback must be sensed.
		Another view of closed-loop processing may also refer to a similar mode of operation in which there is a limited amount of time for knowledge to be brought to bear or for an action's effects to be perceived.
	ai.eecs.umich.edu /cogarch0/common/prop/closedloop.html

	DBAzine.com: Closed Loop Systems
		In a closed loop system the organization making the decision is well aware of who the customer is and what reaction the customer has to the decision being made.
		In a closed loop system, a decision is made, then the decision is disclosed to a mass of customers, typically (but not necessarily) through the Internet.
		Even though it is not apparent to most people, the biggest impact of data warehousing is on the enablement of closed loop systems and the profound impact of closed loop systems on the consumer and the corporation.
	www.dbazine.com /datawarehouse/dw-articles/inmon12

	Closed-Loop Marketing
		Internet based "closed loop" marketing processes can shorten the sales cycle and dramatically improve response rates and conversion ratios in complex sales environments.
		"Closed loop" implies the interconnection of the entirety of the sales and marketing process.
		This approach is designed to accelerate the sales and marketing activities and compress the sales cycle time line of companies.
	www.modanovagroup.com /html/closed-loop_marketing.html

	Closed Loop Steering
		This closed loop system is a way of connecting the handlebars to the forks on a recumbent bike.
		The bolt is used to tension the closed loop system.
		The end of the bolt is flattened out, a hole drilled into the end so that the chain can be clamped on as they usually are using the chain pins.
	www.ihpva.org /people/tstrike/building/closed.htm

	Closed loop treatment
		A closed loop system is a cooling or heating system with minimal losses and therefore minimal water make up.
		An example of a closed loop system is a hot water heating system or chilled water system.
		The source of the scale may be from the make up water or may be from insoluble corrosion products from within the closed loop system.
	www.watcon-inc.com /prod03.htm

	Open loop -vs- Closed loop
		The open loop system costs less than the closed loop system to install.
		The closed loop system costs more than the open loop to install.
		An open loop system requires a well and a pond or area to discharge the water on your property.
	www.geothermal-volante.com /sys-tmpl/openloopvsclosedloop

	CLOSED-LOOP SYSTEMS
		Frequency response and time domain response of elements within a closed loop can cause instability such that the system goes completely bonkers.
		This means that you can cancel or minimize the effects of functions you can't control simply by including them "inside the loop" - i.e., in series with A. Now that we've dealt with the exact equations, we'll show some useful simpliying assumptions.
		When it reaches speed, the loop equations are satisfied and the amp should back off the drive.
	www.metalwebnews.com /howto/closed-loop/closed-loop.html

	Closed-Loop Convex Formulation of Classical and Singular Value Loop Shaping
		ABSTRACT: We show that control system design via classical loop shaping and singular value loop shaping can be formulated as a closed-loop convex problem.
		Second, closed-loop convex design methods can be used to aid the designer using classical loop shaping by computing absolute performance limits against which a classical design can be compared.
		Consequently, loop shaping problems can be solved by efficient numerical methods.
	www.stanford.edu /~boyd/loop.html

	Thurston County - Closed Loop Park Home Page
		Closed Loop Park is funded through solid waste user fees and a grant from the WA State Department of Ecology.
		The park is an example of how to "close the recycling loop", illustrating many examples of recycled products such as salvaged, remilled lumber for the structures, compost bins made from recycled plastic, shredded Holiday tree mulch lining the pathways and recycled plastic lumber posts for mounting signs.
		Visit our pages to find out about or humble beginnings, how the garden closes the recycling loop, earth-friendly garden management techniques and how plants are selected.
	gardening.wsu.edu /closedloop

	DSCR Closed Loop Motor Oil
		Closed Loop service is limited to the continental United States (CONUS.) The Basic program consists of standard one-way delivery of re-refined motor oil to any location worldwide, including CONUS.
		The Closed Loop program includes delivery of re-refined oil and pick-up of used oil up to 120% of the amount of oil purchased for the same price.
		Used oil in excess of 120% of that which was purchased under the program may be removed for a fee of $.20 per gallon.
	www.dscr.dla.mil /userweb/dscrld/re-refined/RR.htm

	Closed-loop transfer function - Wikipedia, the free encyclopedia
		signal to the circuits enclosed by the loop.
		In telecommunication, a closed-loop transfer function is a mathematical expression ( algorithm) describing the net result of the effects of a closed ( feedback)
	en.wikipedia.org /wiki/Closed-loop_transfer_function

	Closed Loop Analysis - Applied
		Act is a dynamic process of course-correction that loops back to the Plan step.
		If you can distill the characteristics of this source site that generate a higher propensity to be interested in the target site, you might be able to find other high-performing feeder sites.
		The conclusion is that these folks followed a web-ring and did not come to these sites on their own.
	www.damanconsulting.com /company/articles/body_portcla.html

	granulators GRANULATORS grinders regrind plastic equipment cyclones conveyors blowers reprocessing ROTOGRAN granulators
		We have the ability to custom-design any closed loop granulating system to best suit your need, for the in-line scrap handling of injection moulding, blow-moulding, extrusion and or recycling operations.
	www.rotogran.com

	Harnessing the Energy - The Smith's Go Underground
		installing the closed loop, should not be considered part of the HVAC cost because it is no different from providing the site with a utility such as bringing in a natural gas line or installing a propane tank.
		Also, the pump required to circulate the fluid in a closed loop is much smaller than the pump required to draw water from a well or aquifer.
		The earth is not a direct energy source, but must first exchange heat with the closed loop before the fluid is circulated back to the heat pump.
	www.hydroheat.com /harnessing.shtml

	Closed Loop Solar Water Heating Systems
		Closed Loop Solar Heating Systems are suitable for single and multiple solar heating application systems, e.g.
		The Closed Loop Solar Heating Systems are suitable for areas with questionable water quality and all climate conditions.
		The Closed Loop Solar Heating Systems are the preferred option for extremely cold areas.
	www.thermomax.com /closed.html

	Closed Loop Change Management Software Solutions
		Dimensions is an enterprise-strength closed loop change management software configuration and change management solution that provides the framework for enforcement and ongoing improvement in business rules, development processes and asset change practices.
		Ensuring workflow through established checkpoints and approvals Providing auditability and traceability to meet any closed loop change management software certification warranty or standard Enabling reuse of assets and best practices for higher productivity by incorporating closed loop change management solutions.
		Serena Professional Services is pleased to offer a comprehensive closed loop solution for change management software.
	www.merant.com /closed_loop_change_management_software.html

	Closed-loop Intestinal Obstruction
		Surgical exploration found a closed loop obstruction of the distal ileum secondary to a large band like adhesion presumably from the previous c-section.
		Selected images from her abdominal CT performed on this third visit to the ER demonstrate findings consistent with a closed loop obstruction.
		Hashimoto M, Miyauchi T, Watanabe O, Tomura N, Watarai J. Computed tomographic appearance of closed-loop obstruction.
	home.earthlink.net /~radiologist/tf/050602.htm

	Data Warehousing Review - Closed Loop Data Mining
		Examples where closed loop data mining are used in practice includes a major wireless telephone company based in the United States.
		If the data mining analysis detects a result of interest, an alert is prepared and sent to the end-user.
		Ideally there should be a pre-implementation period of two months to perform parallel processing and comparison of manual versus automated analysis.
	www.dwreview.com /Data_mining/Closed_loop_DM.html

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In the News (Sun 15 Nov 09)