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| | [No title] |
 | | A computer science application of this is a printer queue. | | | Name at least 2 other places in computer science a priority queue would be used. | | | (A common implementation of a priority queue is done using a binary heap. |
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http://www.cs.unc.edu/~vanbusum/comp121f01/handouts/Priority_Queues
(672 words)
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| | Heaps and Priority Queues |
| | Priority queues are often used in the implementation of algorithms. | | | Typically the problem to be solved consists of a number of subtasks and the solution strategy involves prioritizing the subtasks and then performing those subtasks in the order of their priorities. | | | In general, it is possible for users to submit documents for printing much more quickly than it is possible to print them. |
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http://www.brpreiss.com/books/opus5/html/page350.html
(332 words)
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| | Priority Queues and the STL |
| | Notice for example that node 10 has a higher priority (39), than node 3, which is two levels higher up in the tree. | | | After counting all the characters in the input file, and adding the initial count values to priority queue, the loop that builds the encoding tree is deceptively simple: | | | At the start of this article, I mentioned that priority queue containers would be ideal for developing Huffman coding trees. |
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http://dogma.net/markn/articles/pq_stl/priority.htm
(3201 words)
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| | Priority Queues |
| | Bounded height priority queues are very useful in maintaining the vertices of a graph sorted by degree, which is a fundamental operation in graph algorithms. | | | ) is an algorithm animation system for UNIX and X-windows, that includes animations of such advanced priority queue data structures as binomial and Fibonacci heaps, as well as a spiffy animation of heapsort. | | | Bounded height priority queue - This array-based data structure permits constant-time insertion and find-min operations whenever the range of possible key values is limited. |
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http://www2.toki.or.id/book/AlgDesignManual/BOOK/BOOK3/NODE130.HTM
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| | Topic #15 |
| | A good implementation for this type of queue would be a priority queue, to optimize the overall processing time of jobs. | | | Thus, a priority queue can be used to find either a minimum or a maximum, but this needs to be known a priori. | | | The priority could be set de pending on how long the process has been waiting (to avoid starvation), and could also depend on who started the process (e.g. |
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http://www.cs.mcgill.ca/~cs251/OldCourses/1997/topic15
(1282 words)
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| | priority_queue<T, Sequence, Compare> |
| | Defined in the standard header queue, and in the nonstandard backward-compatibility header stack.h. | | | Priority queues are discussed in all algorithm books; see, for example, section 5.2.3 of Knuth. | | | The type of object stored in the priority queue. |
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http://www.sgi.com/tech/stl/priority_queue.html
(528 words)
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| | Citations: An empirical evaluation of priority queue algorithms for real-time applications - Maheshwari (ResearchIndex) |
| | It is a complete binary tree, but the leaves are the elements of the priority queue and the interior nodes form a binary decision tree; hence, every parent node is assigned the higher value of its two children. | | | performed a thorough evaluation of priority queue datastructures to determine which algorithms are appropriate for a real time environment. | | | Maheshwari, R., An empirical evaluation of priority queue algorithms for realtime applications, in Department of Computer Science. |
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http://citeseer.ist.psu.edu/context/1489634/0
(526 words)
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| | Linux Priority-Queue Scheduler |
| | The assignment of tasks to a priority queue is only based on the non-affinity goodness value of a particular task. | | | At scheduling time, the search for a suitable task to run can be limited to a certain priority range defined by the top most priority task in the system and priority boost given for tasks running on the same processor and on the same memory map. | | | It then reacquires the runqueue lock and all tasks that previously had a zero counter value, are still enqueued in the lowest priority queue which is not considered for scheduling. |
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http://lse.sourceforge.net/scheduling/PrioScheduler.html
(1901 words)
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| | Configuring Priority Queueing |
| | This chapter describes the tasks for configuring priority queueing on a router. | | | DECnet packets with a byte count less than 200 are assigned a medium priority queue level. | | | IP packets originating or destined to User Datagram Protocol (UDP) port 53 are assigned a medium priority queue level. |
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http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/qos_c/qcpart2/qcpq.htm
(695 words)
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| | OOP - Priority Queue Assignment |
| | That is any storage allocated in you priority queue class should be automatically deallocated when priority queue objects are destroyed or go out of scope (Hint: use the destructor). | | | If the queue is empty (or if an error occurs) this method should return a negative return code. | | | Describe the algorithm that you used to manage the enqueue and dequeue processing. |
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http://www.cs.drexel.edu/~bmitchel/course/mcs350/priorityQ_hw.html
(737 words)
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| | The priority queue Data Abstraction |
| | A more computer-related example of a priority queue is the list of pending processes maintained by an operating system, where the value associated with each element is the priority of the job. | | | An everyday example of a priority queue is the to do list of tasks waiting to be performed that most of us maintain to keep ourselves organized. | | | A priority_queue is a data structure useful in problems where you need to rapidly and repeatedly find and remove the largest element from a collection of values. |
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http://www.roguewave.com/support/docs/sourcepro/stdlibug/11-1.html
(423 words)
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| | Linux Clustering with Ruby Queue: Small Is Beautiful Linux Journal |
| | The first task I faced when creating Ruby Queue (rq) was to work out the issues with concurrent access to NFS shared storage, and the first bridge I had to cross was how to accomplish NFS-safe locking from within Ruby. | | | Ruby Queue uses YAML extensively both as input and output format. | | | This happens when two clients have an NFS file open and one of them removes it, causing the the NFS server to rename the file something like ".nfs123456789" until the second client is done with it and the file truly can be removed. |
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http://www.linuxjournal.com/article/7922
(5026 words)
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| | Prioritized Listen Queue: Simple Priority |
| | Clients belonging to a common priority level are all created by a Webstone benchmark that requests an 8 KB file. | | | A separate Webstone instance is used for each priority level. | | | However, one may need many priority classes for different levels of service. |
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http://www.usenix.org/event/usenix01/full_papers/voigt/voigt_html/node14.html
(467 words)
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| | Homework Help!! Priority Queue ?? |
| | Because processes are added to the queue in random places, based on their PR, they're stored via a binary tree. | | | In other words, some form of a penalty must be in place the longer high priority processes have to wait in the queue. | | | In addition, I'm currently working on something like a "reheapify" function which can be called at any time, and it "fixes" any inconsistencies in the binary tree should the PR of a process be changed. |
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http://www.daniweb.com/techtalkforums/thread938.html
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| | Heap (Priority Queue) Management in Hardware (ICS-FORTH) |
| | This novel heap management algorithm can be used in ASIC implementation of WRR schedulers, where each level of the heap tree is stored in a separate memory, so that multiple heap operations can proceed in parallel, each of them operating on a different level of the tree. | | | The hardest and most interesting scheduling algorithms rely on a common computational primitive: priority queues. | | | Critical time priority queues require hardware instead of software management. |
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http://archvlsi.ics.forth.gr/muqpro/heapMgt.html
(1006 words)
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| | dBforums - C++ stl priority_queue |
| | When I create a Task and put it in the queue I would like to be able to change the priority of the created task and thereafter I would like to sort the queue again. | | | I want to use the stl priority_queue to store "Task's" sorted by the Task's priority. |
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http://www.dbforums.com/printthread.php?t=319105
(80 words)
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| | A Heap Based Priority Queue |
| | When such a node is added, it must be moved from its position as the last element in the heap to the first, by tracing a path from its current position to the root of the heap. | | | First, of all the data structures considered, the heap was the simplest to implement and debug. | | | The data structure used in this scheduler implementation is known as a Binary Heap. |
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http://www.csua.berkeley.edu/~ranga/school/cs161
(1874 words)
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| | Homework 6 - Data Structures, Spring 2004 |
| | New tasks are inserted on a person or computer's priority queue, keyed by their importance. | | | Whenever the person or computer has some free time, he/she/it removes the most important task from the queue and takes care of it. | | | Carrying out this task may involve putting new tasks on your queue - "put on coat" and "walk to meeting," not to mention any new tasks that arise during the meeting itself. |
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http://www.cs.jhu.edu/~jason/226/hw6
(5097 words)
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| | [Python-Dev] Priority queue (binary heap) python code |
| | Schemes that store (priority, object) tuples to exploit lexicographic comparison are convenient to code but a nightmare if priorities can ever be equal, and object comparison can raise exceptions, or object comparison can be expensive. | | | It's a mountain of fairly sophisticated code with an interface so rich that it's genuinely hard to learn how to use it as intended -- the latter especially should appeal to just about everyone . | | | One for a new "AbstractData" > package (that would include the heap algorithm) and one for an update to > Queue that would use some algorithm from AbstractData. |
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http://mail.python.org/pipermail/python-dev/2002-June/025940.html
(349 words)
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| | Using priority_queue |
| | Well in the code I wrote nothing is const, so you shouldn't have any problem deleting pointers extracted from the queue. | | | The reason why I ask is that I want a data structure that contains pointers to objects, not copies of objects. | | | Also, I want them to be sorted by priority. |
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http://www.codecomments.com/showthread.php?threadid=238798&goto=nextnewest
(1377 words)
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| | The Priority Queue Operations |
| | Instead of iterating over values, a typical algorithm that uses a priority queue constructs a loop, which repeatedly pulls values from the structure (using the | | | The example program described in the next section will illustrate this use. | | | priority_queue< int, vector<int> > queue_one; priority_queue< int, vector<int>, greater<int> > queue_two; priority_queue< double, deque<double> > queue_three(aList.begin(), aList.end()); priority_queue< eventStruct, vector<eventStruct> > queue_four(eventComparison); priority_queue< eventStruct, deque<eventStruct> > queue_five(aVector.begin(), aVector.end(), eventComparison); |
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http://www.roguewave.com/support/docs/hppdocs/stdug/11-2.html
(404 words)
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| | Chapter 16: Queues and Priority Queues |
| | The reason I say this is the most general discipline is that the priority can be based on anything: what time a flight leaves, how many groceries the customer has, or how important the customer is. Of course, not all queueing disciplines are "fair," but fairness is in the eye of the beholder. | | | An ADT that defines the operations one might perform on a priority queue. | | | The instance variables and the constructor are straightforward, although again we have the problem that we have to choose an arbitrary size for the array. |
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http://www.ibiblio.org/obp/thinkCSjav/chap16.htm
(3256 words)
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| | Priority Queues |
| | The analysis of a practical and nearly optimal priority queue Abstract | | | Optimal Parallel Initialization Algorithm for a Class of Priority Queues, with Zhaofang Wen | | | An efficient construction algorithm for a class of implicit double-ended priority queues |
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http://priority-queues.webhop.org
(2876 words)
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| | Maintaining a Priority Queue and Displaying Text in Multiple Styles |
| | The way this iterator does its work is by starting with the iterator for the highest priority list, and visiting all of those items. | | | In this case, it would be necessary to maintain items with identical priorities in their own data structure, either in a | | | However, it is still necessarily to do the bulk of the work necessary to create a custom implementation. |
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http://java.sun.com/developer/JDCTechTips/2002/tt0821.html
(1862 words)
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| | ray |
| | Worst runtime of the algorithm occurs if all inserted priority values are in ascending order. | | | However as soon as the correct position is found to merge the element into R the loop is quit, therefore the tree creation is cancelled, too. | | | Implementation has been thoroughly tested under heavy load, a snapshot routine is build in which allows to create episodes of the datastructurestate. |
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http://cip.uni-trier.de/sausen/cook/priority_en.html
(1197 words)
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| | Analysis Of An Improved Priority Queue For Discrete Event Simulation Of Many Moving Objects (ResearchIndex) |
| | Abstract: During the simulation of physical systems based on many moving objects, the efficiency of the algorithm and data structure used to manage the events of the process is crucial. | | | Analysis Of An Improved Priority Queue For Discrete Event Simulation Of Many Moving Objects | | | Analysis Of An Improved Priority Queue For Discrete Event Simulation Of Many Moving Objects (ResearchIndex) |
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http://citeseer.ist.psu.edu/114533.html
(436 words)
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| | priority queue |
| | changing priorities while the object is still in the queue, can be made | | | I would need a kind of data structure that I cannot find in the JAVA |
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http://javaquestions.org/ftopic7788.html
(441 words)
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| | Scalable Hardware Priority Queue Architectures for High-Speed Packet Switches |
| | In this paper, we first compare four existing hardwa re priority queue architectures, and identify scalability limitations on implementing these existing architectures for large N and P. Based on our findings, we propose two new priority queue architectures, and evaluate them using simulation results from V erilog HDL and Epoch implementations. | | | Due to the high-speed links and small packet sizes, a hardware solution is needed for the priority queue in order to make the link schedulers effective. | | | Scalable Hardware Priority Queue Architectures for High-Speed Packet Switches |
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http://csdl.computer.org/comp/proceedings/rtas/1997/8016/00/80160203abs.htm
(284 words)
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| | An Improved Dynamic Priority Queue for Multimedia Network Communications |
| | After SOR (successive over-relaxation) simulation the results illustrate that the improved dynamic priority queue is efficient to improve the performance of the total system. | | | In this paper we propose an optimizing queue scheme for multimedia network communications with dynamic priority. | | | The high priority user (e.g., control messages, video, voice) has higher access possibility than the low priority user (e.g., data). |
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http://csdl2.computer.org/persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/aina/2003/1906/00/1906toc.xml&DOI=10.1109/AINA.2003.1192878
(201 words)
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| | List of data structures - Wikipedia, the free encyclopedia |
| | For a wider list of terms, see list of terms relating to algorithms and data structures. | | | An attempt to classify some of these based on feature attributes: | | | Priority queue - sometimes implemented as a Heap, below |
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http://en.wikipedia.org/wiki/List_of_data_structures
(104 words)
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| | priority queue - OneLook Dictionary Search |
| | priority queue : Free On-line Dictionary of Computing [home, info] | | | priority queue : Dictionary of Algorithms and Data Structures [home, info] | | | Tip: Click on the first link on a line below to go directly to a page where "priority queue" is defined. |
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http://www.onelook.com/?w=priority+queue&ls=a
(125 words)
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| | Priority Queue |
| | The output windows, `o/p', show the contents of the priority queue | | | (n), and the maximum time for insertion and for removing the highest priority item is O(log(n)). | | | Elements to be inserted into the priority queue should be put in the `add' window, then use the add button. |
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http://www.csse.monash.edu.au/~lloyd/tildeAlgDS/Priority-Q
(657 words)
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| | Concurrent Error Detection In Priority Queue Managers For ATM Networks |
| | Index Terms- error detection; concurrent error detection; priority queue managers; ATM networks; functional model; queue managers; functional errors; physical failures; hardware overhead | | | Concurrent Error Detection In Priority Queue Managers For ATM Networks | | | "Concurrent Error Detection In Priority Queue Managers For ATM Networks," prfts, p. |
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http://csdl2.computer.org/persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/prfts/1997/8212/00/8212toc.xml&DOI=10.1109/PRFTS.1997.640126
(220 words)
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| | [No title] |
| | The function I'm integrating is sin(xlogx) from 1 to 10000 because it's hard to integrate and requires lots of small intervals. | | | Then I made the numerical algorithm more sophisticated. | | | This is not the case with sin(xlogx) because that function is too uniformly hard to integrate. |
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http://www.math.mcgill.ca/loisel/numerical-integration.html
(286 words)
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| | FORTH - ICS: |
| | Evangelos P. Markatos: Multiprocessor Synchronization Primitives with Priorities, in Y.-H. Lee, C.M. Krisna (Eds.), Readings in Real-Time Systems, IEEE Computer Society Press, Los Alamitos, CA, 1992. | | | Lamaire, D. Serpanos: A Two-Dimensional Round-Robin Sceduling Mechanism for Switches with Multiple Input Queues, U.S. Patent 5,299,190, March 29 1994. | | | Lamaire, D. Serpanos: A 2-Dimensional Round-Robin Sceduling Mechanism for Switches with Multiple Input Queues, In IEEE/ACM Transactions on Networking, pages 471-482, 2(5), Oct 1994. |
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http://www.ics.forth.gr/carv/publications.html
(4993 words)
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| | DataCompression.info - Tutorials, Reference, Presentations |
| | The example program implements a Huffman Encoder using the queues, showing how they can do a fairly complex piece of work without too much coding on your part. | | | Arturo Campos descrives Canonical Huffman Coding, the technique used in the deflate algorithm made popular by PKZip. |
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http://www.datacompression.info/Tutorials.shtml
(7923 words)
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| | Priority queue - Wikipedia, the free encyclopedia |
| | Other popular implementations include binomial heaps, fibonacci heaps (asymptotically superior in some cases), balanced binary trees (often used due to their easy availability in the Java standard library), and more general structures such as the van Emde Boas tree. | | | Priority queuing can be used to manage limited resources such as bandwidth on a transmission line from a network router. | | | Another use of a priority queue is to manage the events in a discrete event simulation. |
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http://www.wikipedia.org/wiki/Priority_queue
(444 words)
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| | Citations: Concurrency in an O(log log n) priority queue - Dixon (ResearchIndex) |
| | Dixon, "Concurrency in an O(log log N) priority queue," in Proceeding of Parallel and Distributed Computing. | | | Parallel and Distributed Computing, Theory and Practice, First Canada-France Conference, pp. | | | Applying this algorithm to Frame based Fair Queueing results in a complexity of O(log log F) where F is the frame size. |
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http://citeseer.ist.psu.edu/context/363164/0
(309 words)
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| | Random Priority Queue Problems |
| | will cause 9 priority queue trace files to appear in the directory. | | | For problem size (N,M), the program generates N initial inserts, followed by M repetitions of | | | For problem size N, the program generates N inserts of random priorities, followed by N delete-mins. |
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http://www.cs.amherst.edu/~ccm/challenge5/p_queue/random.html
(311 words)
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| | priority queue |
| | Definition: An abstract data type to efficiently support finding the item with the highest priority across a series of operations. | | | Paul E. Black, "priority queue", from Dictionary of Algorithms and Data Structures, Paul E. Black, ed., NIST. | | | Note: It can be implemented efficiently with a heap. |
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http://www.nist.gov/dads/HTML/priorityque.html
(224 words)
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| | ASPN : Python Cookbook : Heap-based priority queue |
| | Tasks are added with the time to perform them; the top of the queue is always the next thing to do. | | | In this code the whole entry is compared. | | | This is a Priority Queue based on a heap data strucuture. |
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http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81693
(361 words)
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| | ASPN : Python Cookbook : Priority Queue |
| | Assuming item is a tuple of (priority, data), then it would be inserted amongst other items in the queue with the same priority, but sorted by the value of its data, rather than by its arrival time. | | | Using bisect.insort_right as you suggest would not work. | | | If x is already in list, insert it to the right of the rightmost x. |
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http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/87369
(168 words)
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| | MASTER OF TECHNOLOGY (M |
| | Formal definitions, operations, implementations and applications of basic data structures; array, stack, queue, dequeue, priority queue, doubly linked list, orthogonal list, binary tree-traversal algorithms, threaded binary tree, generalized list. | | | Introduction to waiting line models – steady state behavior of M/M/1 and M/M/C queues-the problem of machine interference and use of finite queuing tables-introduction to M/G/1, and G/M/1. | | | Inventory Control Project: Carrying out an inventory control study-relevant costs to be considered, estimation of costs by imputation or otherwise, ABC analysis and Selective inventory management, Decaying inventory. |
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http://www.isical.ac.in/~deanweb/mqrorcon.html
(7898 words)
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| | ECE Publications |
| | DeMara, “Smart Priority Queue Algorithms for Self-optimizing Event Storage,” Simulation Modeling Practice and Theory, Vol. | | | DeMara and A. Rocke, “Mitigation of Network Tampering Using Dynamic Dispatch of Mobile Agents,” Computers and Security, Vol. |
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http://www.ece.ucf.edu/research/ece_publications.html
(14797 words)
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| | Tatarize - Content |
| | Above and beyond any other queuing priority system. | | | The advanced settings for the fserver such as the color settings and the per user fserver settings. | | | Although it can be used to block off channels as well by setting the number of queues to "None/Halt" which will prevent a matching person to access any queue pool beyond the Halted. |
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http://tatarize.com/modules.php?name=Content&pa=showpage&pid=2
(1151 words)
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| | monotone priority queue |
| | Go to the Dictionary of Algorithms and Data Structures home page. | | | Paul E. Black, "monotone priority queue", from Dictionary of Algorithms and Data Structures, Paul E. Black, ed., NIST. | | | Definition: A priority queue in which a key being inserted is never higher in priority than a previously deleted node. |
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http://www.nist.gov/dads/HTML/monotonprioq.html
(94 words)
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| | Priority Queue Sample code |
| | Note: The following code does not use the packaging and class naming conventions described in lab06. | | | I'll use a version of strategy # 1 as discussed in Lecture. | | | /*************************************** * TestSortByPriorityQueue * * Synopsis: This demonstrates one way of using a priority Queue to sort items in some linear structure. |
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http://www.cise.ufl.edu/~crummer/cop3530html/PriorityQueue.html
(241 words)
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| | Priority Queues and Heapsort Lecture 18 |
| | In greedy algorithms, we always pick the next thing which locally maximizes our score. | | | This simulation is not as efficient as a normal stack/queue implementation, but it is a cute demonstration of the flexibility of a priority queue. | | | Both stacks and queues can be simulated by using a heap, when we add a new time field to each item and order the heap according it this time field. |
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http://www.cs.sunysb.edu/~skiena/214/lectures/lect18/lect18.html
(1132 words)
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| | Linux Priority-Queue Scheduler |
| | Here we are assured that tasks only move from | | | Since in the current active implementation the load_value per process in the run queue is "1", the cpu_load and the nt_running column will be equivalent and the ratio will be always one. | | | As a result, tasks are moved between queues in the same pool in an attempt to achieve AL as the queue length. |
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http://lse.sourceforge.net/scheduling/LB/poolMQ.html
(942 words)
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| | Heapsort and Priority Queue in Java |
| | The UML Diagram is showing the Java classes of the solution. | | | This is a solution for both the heapsort algorithm exercise and the priority queue exercise. | | | Prints out the expected values and the values received from the queue to the console. |
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http://olli.informatik.uni-oldenburg.de/heapsort_SALA/english/Aufgaben/Programmieren/prog_lsg.html
(177 words)
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