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Topic: Flooding algorithm


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In the News (Wed 2 Dec 09)

  
  Search Encyclopedia.com
flood flood, inundation of land by the rise and overflow of a body of water.
Floods occur most commonly when water from heavy rainfall, from melting ice and snow, or from a combination of these exceeds the carrying capacity of the river system, lake, or ocean into which it runs.
Mississippi -> Attempts at Flood Control The flow of the river is greatest in the spring, when heavy rainfall and melting snow on the tributaries (especially the Missouri and the Ohio) cause the main stream to rise and frequently overflow its banks and levees, inundating vast areas of the plain.
www.encyclopedia.com /searchpool.asp?target=Flooding+algorithm   (546 words)

  
 Flooding algorithm - Wikipedia, the free encyclopedia
Flooding algorithms are used in systems such as Usenet and peer-to-peer file sharing systems and as part of some routing protocols, including OSPF, DVMRP, and those used in ad-hoc wireless networks.
Real-world flooding algorithms have to be more complex than this, since precautions have to be taken to avoid wasted duplicate deliveries and infinite loops, and to allow messages to eventually expire from the system.
Flooding algorithms are also useful for solving many mathematical problems, including maze problems and many problems in graph theory.
en.wikipedia.org /wiki/Flooding_algorithm   (223 words)

  
 Flooding algorithm   (Site not responding. Last check: 2007-10-10)
A flooding algorithm is an algorithm for distributingmaterial to every part of a connected network.
Flooding algorithms are used in systems such as Usenet and peer-to-peer file sharing systems and as part of some routing protocols, including OSPF, DVMRP, and those used in ad-hoc wirelessnetworks.
Real-world flooding algorithms have to be more complex than this, since precautions have to be taken to avoid wasted duplicatedeliveries and infinite loops, and to allow messages to eventually expire from the system.
www.therfcc.org /flooding-algorithm-183453.html   (174 words)

  
 InfoVis CyberInfrastructure- Similarity Flooding Algorithm   (Site not responding. Last check: 2007-10-10)
The algorithm sifts through the two networks to identify nodes that share the same node label string.
Presently the algorithm is not restricted to any particular network size.
It is general graph matching algorithm that can be used to map systems that can be represented as graphs.
iv.slis.indiana.edu /sw/simplematch.html   (279 words)

  
 [No title]
Algorithm 2 does full flooding but in case two neighbors are connected by multiple interfaces, flooding is done over only one such interface.
Algorithm 5 (Flooding over one of many parallel links between neighbors for all LSAs plus flooding over a minimum spanning tree for LSAs that do not carry intra-area topology information): This algorithm is a hybrid between Algorithms 2 and 4.
Comparison of Algorithm 4 and Algorithm 2: Compared to Algorithm 2, Algorithm 4 always raises the LSA storm threshold substantially and in four out of the five cases the LSA storm threshold is raised to its maximum value, i.e., it is OK to flood all LSAs in the LSDB over a short period of time.
www.ietf.org /proceedings/02nov/I-D/draft-choudhury-manral-flooding-simulation-00.txt   (4820 words)

  
 TerraFlow: Flooding the terrain   (Site not responding. Last check: 2007-10-10)
Flooding removes the sinks in the terrain by simulating flooding the terrain with an infinite amount of uniform rainfall.
Flooding causes the level of water to gradually increase in each of the sinks and pockets of the terrain, causing them to overflow and spill into each other repeatedly, until each cell finds a flow path downhill.
Flooding determines the final level of the water for each cell of the terrain, and if it is higher than the elevation of that cell (ie.
www.cs.duke.edu /ari/geo*/terraflow/flood.html   (566 words)

  
 Maze Solving Algorithm
The Bellman flooding algorithm is a popular maze solver with micromouse contestants and has been used by several world championship-winning mice.
To find the quickest route to the centre of the maze it is necessary to use an advanced form of the Bellman flooding algorithm, which floods with time instead of distance.
Pseudo code for the iterative Bellman flooding algorithm is shown in Figure 3 outlining the key stages in the process.
www.lboro.ac.uk /departments/el/robotics/Maze_Solver.html   (550 words)

  
 Project-Team-hipercom
Optimizing flooding is a fundamental feature in a multihop wireless network since communication resource is scarse and an overloaded network can completely collapse due to the effect of numerous hidden collisions.
We have introduced the super-flooding algorithm in which any node retransmits a route request packet copy as often it receives copies via a shorter path than the previously retransmitted route request.
Super-flooding overhead is around twice regular flooding overhead, and it reduces by 60 percent the data traffic overhead.
www.inria.fr /rapportsactivite/RA2004/hipercom/uid37.html   (371 words)

  
 Optimizing flooding of information in link-state routing protocol - US Patent 6820134   (Site not responding. Last check: 2007-10-10)
In the illustrative embodiment, the flooding algorithm may be defined in terms of its operation on various data structures.
Since the novel technique changes the flooding algorithm from a per-interface to a per-neighbor model, PDU retransmission is not directed to a particular neighbor on a particular interface, but rather is directed solely to a particular neighbor.
In the illustrative embodiment, the flooding algorithm and its associated link state routing protocol may be defined in terms of its operation on various data structures.
www.patentstorm.us /patents/6820134.html   (7725 words)

  
 Chapter 5 section 2   (Site not responding. Last check: 2007-10-10)
The routing algorithm is that part of the network layer software responsible for deciding which output line and incoming packet should be transmitted on.
Another static algorithm is flooding, in which every incoming packet is sent out on every outgoing line except the one it arrived on.
Flooding is not practical in most applications, but it does have some uses.
www.chapman.edu /cpsc/faculty/fahy/cpsc353/text/Chp5sec2.html   (776 words)

  
 Performance Indicator Summary - Flooding   (Site not responding. Last check: 2007-10-10)
The Flooding PI algorithm is applied to the entire parcel database for the duration of a simulation in the SVM, commonly 101 years.
The algorithm keeps track of the estimated damage for the May 1, 1973 event and continues to move through the time series to look for combinations of lake levels and wave heights that could damage the structure.
The predicted flood events for the historic time series from 1960 to present corresponded to years when flood damages were actually reported (1973, 1992, etc.).
www.losl.org /twg/pi_flooding-e.html   (1201 words)

  
 InfoVis CyberInfrastructure- Similarity Flooding Algorithm   (Site not responding. Last check: 2007-10-10)
Similarity flooding is a matching algorithm based on fix-point computation that is usable across different scenarios [Melnek, S., et.
The percentage of accurate match done by the algorithm is a measure of its accuracy.
The algorithm works independent of the complexities of the underlying data and utilizes the relationship between the data points to estimate similarity.
iv.slis.indiana.edu /sw/simflooding.html   (506 words)

  
 Incremental Voxelization
The algorithm in Algorithm 1 describes the current approact to voxelization, it is clear that there some optimization that can be done with regards to the algorithm.
To achieve this goal the algorithm has to know exactly which points are pierced by the triangle, however knowing which points are included is easy because we know that each point in the discrete representation is a neighbour to at least two other voxels in the discrete triangle.
The incremental algorithm produces unwanted aliasing effects due to step 1.4.2, the algorithm tend can sometime miss the tertiary line and continues to run until the offset is reached (look at figure 4).
www.sfu.ca /~htw/878/project   (1107 words)

  
 Solving the micromouse maze
Many mouse builders have their mouse follow rules that, for example, ensure all four quadrants are searched or that turns are made preferentially in one or another direction depending on where you are.
In practice, the algorithm will run for as many iterations as there are cells in the longest path.
To save a bit of time, a number of designers divide up their flooding algorithm and do just a bit of it as a time delay routine.
micromouse.cannock.ac.uk /maze/solving.htm   (629 words)

  
 CS 336 Lecture Notes -- Flooding Link State Information
The alternative we will use is packet flooding, but we can't use the simple version of flooding used by transparent bridges to forward broadcast packets and packets.
The forwarding of broadcast packets in an extended LAN built using transparent bridges depends on the fact that bridge ports are deactivated as necessary to eliminate loops from the extended LAN.
As the paper on the ARPANET flooding algorithm failure explains, if you end up with three packets numbered 0, R/3 and 2R/3 floating around your network, then 2R/3 seems younger than R/3 which seems younger than 0, but oddly 0 is also younger than 2R/3.
www.cs.williams.edu /~tom/courses/336/outlines/lect24_2.html   (1360 words)

  
 [No title]   (Site not responding. Last check: 2007-10-10)
The protocol is an adaptation of the classical flooding algorithm, with the difference that many nodes are relieved of the responsibility to relay flooded messages while still ensuring that all nodes receive the messages.
For these algorithms to work well with MPRF, the ring radius should be a parameter under control of the protocol algorithm, not the TTL parameter in the IP header.
The MPRF algorithm requires the receiver of a flooded packet to iden- tify of the transmitter for that flooded packet.
people.nokia.net /charliep/txt/mprf/mprf.txt   (5126 words)

  
 Using the Fast-Marching for segmentation
Figure: Watershed transform of a 2D X Ray image of the heart (LV): The seed points are regional minima of the gradient of image 5.9-left; the flooding was implemented in the continuous framework of, and the regional minima were filtered in order to have a smaller set of markers.
If there is a gap in the gradients between two basins, one of the two fronts could flood completely into the adjacent basin with the watersheds, whereas the speed in the adjacent region could still be discriminating the unwanted flooding, in the case of our competitive fronts algorithm.
Therefore, this heuristic must be seen as a region growing algorithm to operate a statistical study at the beginning of the segmentation process before visiting the whole image domain.
math.lbl.gov /~deschamp/phdthesis/node35.html   (1669 words)

  
 Geog473 Software Project Proposal   (Site not responding. Last check: 2007-10-10)
Floods are the most common of all natural disasters.
Flooding affects nearly every U.S. state and territory causing billions of dollars in damage along with too many shattered dreams and broken hearts.
I propose a GIS that will allow an insurance company to simulate the flooding of a waterway and find those properties that are at risk to flooding.
www.geog.umd.edu /gis/courses/GEOG473/2003projects/RPavlick-proposal.htm   (255 words)

  
 Melnik, Sergey; Garcia-Molina, Hector; Rahm, Erhard: Similarity Flooding: A Versatile Graph Matching Algorithm ...
In this paper we present a matching algorithm based on a fixpoint computation that is usable across different scenarios.
The algorithm takes two graphs (schemas, catalogs, or other data structures) as input, and produces as output a mapping between corresponding nodes of the graphs.
As a matter of fact, we evaluate the `accuracy' of the algorithm by counting the number of needed adjustments.
dbpubs.stanford.edu:8090 /pub/2001-25   (389 words)

  
 Read about Flooding algorithm at WorldVillage Encyclopedia. Research Flooding algorithm and learn about Flooding ...   (Site not responding. Last check: 2007-10-10)
Research Flooding algorithm and learn about Flooding algorithm here!
Flooding algorithms are used in systems such as Usenet and
Flooding algorithms are also useful for solving many mathematical problems, including
encyclopedia.worldvillage.com /s/b/Flooding_algorithm   (192 words)

  
 cs213 assignment 1
The object of this effort was to produce, using only the Em* "flooding" service, a scalable solution that would work well for a wide range of network sizes, densities, and topologies.
This was an interesting problem because while the idea is simple, and the interface to flooding is simple, there are a great many different approaches to solve the problem, and finding a good solution turns out to be quite challenging.
The algorithm we suggest is for the sink to send a flooded request, just as in assignment 1.
cvs.cens.ucla.edu /213/cs213_3.html   (1592 words)

  
 Efficient update flooding   (Site not responding. Last check: 2007-10-10)
The basic method for propagating updates in Pangaea is flooding along graph edges, as shown in Figure 4.
Whenever a replica is modified on a server, the server pushes the entire file contents to all the graph neighbors, which in turn forward the contents to their neighbors, and so on, until all the replicas receive the new contents.
This simple flooding algorithm guarantees reliable update delivery as long as the replica graph is strongly connected.
usenix.org /events/osdi02/tech/full_papers/saito/saito_html/node16.html   (119 words)

  
 project proposal   (Site not responding. Last check: 2007-10-10)
Request Routing Algorithm is a constraint flooding algorithm, so it's hard for people to see the effect of the algorithm in work.
Color scheme: while flooding, the color of each super-peer are continuously changing from blue to red gradually, the degree of the color changing depends on the number of duplicated messages they received.
Pattern match: while the networks are changing color as the algorithms are running, a bar chart showing the actual number of duplicated messages is increasing the height of bars accordingly.
www.cs.ubc.ca /~tmm/courses/cpsc533c-04-spr/proposals/pqyu/project_proposal.htm   (935 words)

  
 River Network Extraction
The basic idea behind this algorithm is to identify the lowest pixel along the boundary of the multipixel pit, and then to assign flow directions within the pit such that all flow is routed through this lowest boundary pixel.
The speed of an algorithm is generally measured in terms of the number of operations that must be performed as a function of $n$, where $n$ is the number of objects (e.g.
This algorithm is optimal in the sense that we need to compute a magnitude for each link, and the number of operations the algorithm requires to do this grows linearly with the number of links; i.e.
instaar.colorado.edu /~peckhams/appA.html   (10591 words)

  
 RFC 1245 (rfc1245) - OSPF Protocol Analysis
It also plays a special role in the flooding algorithm, since all routers on the network are synchronizing their link state databases by sending and receiving LSAs to/from the Designated Router during the flooding process.
This statistic was derived by diving the number of LSAs flooded by the number of (non-hello) multicasts sent.
However, it should be noted that the routing algorithm in MILNET incrementally updates the SPF-tree, while OSPF rebuilds it from scratch at each Dijkstra calculation OSPF's Area capability provides a way to reduce Dijkstra overhead, if it becomes a burden.
www.faqs.org /rfcs/rfc1245.html   (3627 words)

  
 Data Structures And Algorithms   (Site not responding. Last check: 2007-10-10)
This book covers some commonly used data structures (such as arrays, linked-lists, trees, and graphs) and algorithms (such as sorting, searching, and various graph algorithms) that are used in Computer Science.
The book is intended primarily for the readers who are already familiar with these data structures and algorithms, but would like to get some information on how to perform some advanced or non-trivial operations on/using them.
Hence, for each data structure and algorithm, I have generally given a lighter treatment to the basic issues (since they are generally already covered elsewhere) and given more attention to more advanced issues related to them.
www.csedtools.com   (203 words)

  
 [No title]   (Site not responding. Last check: 2007-10-10)
You should read the code to understand what this algorithm does to get a frame from node 0 (Stlouispark in my topology file) to all other nodes.
When the first message is given by node 0's application layer to this flooding algorithm, node 0 sends its own frame, containing only the "Howdy" message and a time-to-live field, to *all* its neighbors.
If this is the first time the flooded frame has arrived, the node stores the frame.
www.mathcs.carleton.edu /faculty/jondich/courses/cs337_f95/Tests/midterm2.txt   (791 words)

  
 Similarity Flooding
A reference Java implementation of the algorithm (with the source code) is available for academic use.
and look in the source code to see how the algorithm is utilized.
The Match operator in Rondo is implemented using the Similarity Flooding algorithm.
www-db.stanford.edu /~melnik/mm/sfa   (152 words)

  
 Probabilistic Broadcast for Flooding in Wireless Mobile Ad hoc Networks - Sasson, Cavin, Schiper (ResearchIndex)
As such, the plain flooding algorithm provokes a high number of unnecessary packet rebroadcasts, causing contention, packet collisions and ultimately wasting precious limited bandwidth.
Studies have been undertaken to optimize flooding using a deterministic approach.
Autonomous Gossiping: A Self-Organizing - Epidemic Algorithm For (2004)
citeseer.ist.psu.edu /645037.html   (524 words)

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