Results 1 - 10 of 979

Optimizing the Layout of Proportional Symbol Maps

by Guilherme Kunigami, Pedro J. De Rezende, Cid C. De Souza, Tallys Yunes
"... Abstract. Proportional symbol maps are a cartographic tool to assist in the visualization and analysis of quantitative data associated with specific locations (e.g. earthquake magnitudes, oil well production, temperature at weather stations, etc.). As the name suggests, symbol sizes are proportional ..."
Abstract - Cited by 1 (1 self) - Add to MetaCart
Abstract. Proportional symbol maps are a cartographic tool to assist in the visualization and analysis of quantitative data associated with specific locations (e.g. earthquake magnitudes, oil well production, temperature at weather stations, etc.). As the name suggests, symbol sizes

Optimizing the Layout of Proportional Symbol Maps: Polyhedra and Computation

by Guilherme Kunigami, Pedro J. De Rezende, Cid C. De Souza, Tallys Yunes , 2014
"... Proportional symbol maps are a cartographic tool to assist in the visualization and analysis of quantitativedata associated with specific locations, such as earthquake magnitudes, oil well production, and temperature at weather stations. As the name suggests, symbol sizes are proportional to the mag ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
Proportional symbol maps are a cartographic tool to assist in the visualization and analysis of quantitativedata associated with specific locations, such as earthquake magnitudes, oil well production, and temperature at weather stations. As the name suggests, symbol sizes are proportional

Tree visualization with Tree-maps: A 2-d space-filling approach

by Ben Shneiderman - ACM Transactions on Graphics , 1991
"... this paper deals with a two-dimensional (2-d) space-filling approach in which each node is a rectangle whose area is proportional to some attribute such as node size. Research on relationships between 2-d images and their representation in tree structures has focussed on node and link representation ..."
Abstract - Cited by 534 (29 self) - Add to MetaCart
this paper deals with a two-dimensional (2-d) space-filling approach in which each node is a rectangle whose area is proportional to some attribute such as node size. Research on relationships between 2-d images and their representation in tree structures has focussed on node and link

Tile Size Selection Using Cache Organization and Data Layout

by Stephanie Coleman, Kathryn S. M Kinley , 1995
"... When dense matrix computations are too large to fit in cache, previous research proposes tiling to reduce or eliminate capacity misses. This paper presents a new algorithm for choosing problem-size dependent tile sizes based on the cache size and cache line size for a direct-mapped cache. The algori ..."
Abstract - Cited by 231 (2 self) - Add to MetaCart
When dense matrix computations are too large to fit in cache, previous research proposes tiling to reduce or eliminate capacity misses. This paper presents a new algorithm for choosing problem-size dependent tile sizes based on the cache size and cache line size for a direct-mapped cache

Optimal Designs for Space-Time Linear Precoders and Decoders

by Anna Scaglione, Petre Stoica, Sergio Barbarossa, Georgios B. Giannakis, Hemanth Sampath - IEEE Trans. Signal Processing , 2001
"... In this paper we introduce a new paradigm for the design of transmitter space-time coding that we refer to as linear precoding. It leads to simple closed form solutions for transmission over frequency selective multiple-input multiple-output (MIMO) channels, which are scalable with respect to the nu ..."
Abstract - Cited by 197 (6 self) - Add to MetaCart
to the number of antennas, size of the coding block and transmit average/peak power. The scheme operates as a block transmission system in which vectors of symbols are encoded and modulated through a linear mapping operating jointly in the space and time dimension. The specific designs target minimization

Proportional Symbol Mapping in R

by Susumu Tanimura, Chusi Kuroiwa, Tsutomu Mizota
"... Visualization of spatial data on a map aids not only in data exploration but also in communication to impart spatial conception or ideas to others. Although recent carto-graphic functions in R are rapidly becoming richer, proportional symbol mapping, which is one of the common mapping approaches, ha ..."
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Visualization of spatial data on a map aids not only in data exploration but also in communication to impart spatial conception or ideas to others. Although recent carto-graphic functions in R are rapidly becoming richer, proportional symbol mapping, which is one of the common mapping approaches

Optimal and Sub-Optimal Maximum A Posteriori Algorithms Suitable for Turbo Decoding

by Patrick Robertson, Peter Hoeher, Emmanuelle Villebrun - ETT , 1997
"... For estimating the states or outputs of a Markov process, the symbol-by-symbol maximum a posteriori (MAP) algorithm is optimal. However, this algorithm, even in its recursive form, poses technical difficulties because of numerical representation problems, the necessity of non-linear functions and a ..."
Abstract - Cited by 155 (26 self) - Add to MetaCart
For estimating the states or outputs of a Markov process, the symbol-by-symbol maximum a posteriori (MAP) algorithm is optimal. However, this algorithm, even in its recursive form, poses technical difficulties because of numerical representation problems, the necessity of non-linear functions and a

Algorithmic aspects of proportional symbol maps

by Sergio Cabello, Herman Haverkort, Marc Van Kreveld, Bettina Speckmann , 2008
"... Proportional symbol maps visualize numerical data associated with point locations by placing a scaled symbol—typically an opaque disk or square—at the corresponding point on a map. The area of each symbol is proportional to the numerical value associated with its location. Every visually meaningful ..."
Abstract - Cited by 10 (3 self) - Add to MetaCart
Proportional symbol maps visualize numerical data associated with point locations by placing a scaled symbol—typically an opaque disk or square—at the corresponding point on a map. The area of each symbol is proportional to the numerical value associated with its location. Every visually meaningful

Unifying Data and Control Transformations for Distributed Shared-Memory Machines

by Michal Cierniak, Wei Li , 1994
"... We present a unified approach to locality optimization that employs both data and control transformations. Data transformations include changing the array layout in memory. Control transformations involve changing the execution order of programs. We have developed new techniques for compiler optimiz ..."
Abstract - Cited by 176 (10 self) - Add to MetaCart
We present a unified approach to locality optimization that employs both data and control transformations. Data transformations include changing the array layout in memory. Control transformations involve changing the execution order of programs. We have developed new techniques for compiler

Map Layout Using Multicriteria Optimization

by Jonathan M. Stott, Peter Rodgers - Proc. of International Conference on Information Visualisation (IV04 , 2004
"... We describe a system to automatically generate metro maps using a multicriteria approach. We have implemented a hill climbing optimizer which uses a fitness score generated from a sum of several aesthetic metrics. This is used to move from the initial geographic layout of the map to a schematic layo ..."
Abstract - Cited by 18 (1 self) - Add to MetaCart
We describe a system to automatically generate metro maps using a multicriteria approach. We have implemented a hill climbing optimizer which uses a fitness score generated from a sum of several aesthetic metrics. This is used to move from the initial geographic layout of the map to a schematic
Results 1 - 10 of 979