Programming paradigms In computer science , arrayprogramming languages also known as vector or multidimensional ... geometric vector s, matrix mathematics matrices , and higher dimensional arrays. Arrayprogramming ... be dramatic in certain cases it is not uncommon to find arrayprogramming language one liner program ... programming language to provide arrayprogramming capabilities. The mnemonic APL refers to the title .... Concepts The fundamental idea behind arrayprogramming is that operations apply at once to an entire ... behind arrayprogramming actually referring to APL as follows quote most programming languages are decidedly ... derive more efficient algorithm. The basis behind arrayprogramming and thinking is to find and exploit ... concept to arrayprogramming languages in general, by analogy to tensor rank in mathematics functions ... collapses the input array by 1 dimension. Uses Arrayprogramming is very well suited to implicit ... or more cores are increasingly common today. Languages The canonical examples of arrayprogramming ... Arrayprogramming languages provides an exhaustive list. Examples In scalar languages like Fortran ..., when the array language compiler interpreter encounters a statement like Arrayprogramming approach ... G.3.1 Real Vectors and Matrices ref supporting arrayprogramming oriented syntax. Using that library ... as the C loops shown above. An array language, therefore, simplifies programming but may come ... required code x A b code This is not only an example of terse arrayprogramming from the coding point of view but also from the computational efficiency perspective, which in several arrayprogramming ... properties it suggests for explorations. Third party libraries providing arrayprogramming ... case a very terse abstraction in those languages is explicitly influenced by the arrayprogramming ... No stinking loops programming http www.vector.org.uk archive v223 smill222.htm Discovering Array Languages http arrayinphp.com Array In PHP Programming language DEFAULTSORT ArrayProgramming Category ... more details
Objective Caml rangeSize bounds name fst bounds name snd bounds name Haskell programming language Haskell name count 0 name count 1 Objective C code NSArray code only name 1 name Lua programming language Lua SIZE name LBOUND name UBOUND name Fortran len name 0 len name 1 Go programming language Go Array ... wikitable style text align center font size smaller Programming language Array data type Index origin ... Check Array data type Multi dimensional arrays Multidimensional Dynamically sized Arrayprogramming ... of array sup 2 sup style background azure init sup 1 sup style background grey80 ? IDL programming language ... of array sup 2 sup style background honeydew yes style background grey80 ? S Lang programming language ... heap style background grey80 ? class sortbottom Programming language Array data type Index origin Default ... Array data type Multi dimensional arrays Multidimensional Dynamically sized Arrayprogramming Vectorized ... array . The default base index is the lowest value of the index type used. Standard Perl programming ... extension adds array objects with this capability. The standard Python programming language .... div Vectorized array operations Some scripting languages such as IDL programming language IDL ... would use S Lang programming language S Lang create arrays from the even and odd elements of an array ...ProgLangCompare Syntax Array dimensions The following list contains Syntax examples on how to determine ... nowiki nowiki Last Ada programming language Ada UPB name LWB name 1 or br 2 UPB name 2 LWB name 1 etc ... C Sharp programming language C , Visual Basic .NET , Windows PowerShell , F Sharp programming language F name .length 0 name .length 1 Java programming language Java , JavaScript , D programming language ... to this element 1 or name .size 1 name .last will also refer to this element Ruby programming language Ruby len name 0 1 or len name 1 Python programming language Python length name 0 1 or length name 1 S Lang programming language S Lang vector length vector 0 vector length vector 1 Scheme programming ... more details
programming In astronomy A telescope array, also called astronomical interferometer , such as the Very ...An array is a systematic arrangement of objects, usually in rows and columns. Specifically, it may refer ... at run time, including Array data structure , an arrangement of items at equally spaced addresses in computer memory Array data type , used in a programming language to specify a variable that can be indexed Associative array , an abstract data structure model that generalizes arrays to arbitrary indices or various kinds of the above, such as Bit array or bit vector Dynamic array , allocated at run time Parallel array of records, with each field stored as a separate array Sparse array , with most elements omitted, to store a sparse matrix Variable length array Jagged array , where the rows have different lengths individually or various related concepts Vector processor Array processor , a computer to process arrays of data not to be confused with a processor arrayArrayprogramming , using matrix algebra notation in programs not the same as array processing Array slicing , the extraction of sub arrays of an array or also Global Arrays , a library for parallel processing Intel Array Visualizer , a piece of scientific graphics software In mathematics and statistics An array or matrix mathematics e.g. a Monge array , a Costas array A standard array in coding theory In statistics, arrays are a name for some kinds of Category Experimental design Intersection array a concept of category theory The thinned array curse or sparse array curse, a theorem about elecromagnetic waves In technology ... array, such as a phased array , a tower array , etc. A speaker array, used to produce directional Sound Asynchronous array of simple processors Ball grid array , pin grid array , and land grid array , ways to connect integrated circuits Cache Array Routing Protocol CARP Color filter array , placed over an imaging array Disk array , such as the RAID Field emitter array , an electron source ... more details
multiple issues confusing January 2010 notability January 2010 unreferenced January 2010 orphan July 2010 wikify January 2011 Control Array mostly used in Visual Basic is the collection of controls that programmer put it in form VB Form . Control array is always a single dimensional array . Control array is that you can add or delete array elements at run time. With some controls, it is very useful to define control arrays it depends on the application. Control arrays are a convenient way to handle groups of controls that perform a similar function. All of the events available to the single control are still available to the array of controls, the only difference being an argument indicating the index of the selected array element is passed to the event. Hence, instead of writing individual procedures for each control i.e. not using control arrays , you only have to write one procedure for each array. Category BASIC programming language family ... more details
vector . Depending on the programming language and context, the elements of the new array may be aliasing computing aliased to i.e., share memory with those of the original array. Details For one ... language Ada 83 and above Wikibooks Ada Programming Types array Ada 83 supports slices for all ... source 1998 S Lang programming language S Lang Array slicing was introduced in version 1.0. Earlier .... pre 1999 D programming language D Consider the statically allocated array source lang d static int ... array. See also Comparison of programming languages array Slicing Category Arrays Category Programming ...About the data structure operation other uses of slicing Slicing disambiguation In computer programming , array slicing is an operation that extracts certain elements from an array and packages them as another array, possibly with different number of indices or dimensions and different index ranges. Two ... elements 2, 5, 7, 3, 8, 6, 4, 1 , and we want to create an array slice from the 3rd to the 6th items, we get 7, 3, 8, 6 . In programming language s that use a 0 based indexing scheme, the slice ... dimensional slices rectangular matrices from a three dimensional array. However, since the range ... to actually eliminate the trivial indices. General array slicing can be implemented whether or not built into the language by referencing every array through a dope vector or descriptor &mdash a record that contains the address of the first array element, and then the range of each index and the corresponding coefficient in the indexing formula. This technique also allows immediate array transpose transposition , index reversal, subsampling, etc. For languages like C programming language C , where the indices always start at zero, the dope vector of an array with d indices has at least 1 2 d parameters. For languages that allow arbitrary lower bounds for indices, like Pascal programming language Pascal , the dope vector needs 1 3 d entries. If the array abstraction does not support true negative ... more details
In computer science , a dynamic array , growable array , resizable array , dynamic table , or array list .... It is supplied with standard libraries in many modern mainstream programming languages. A dynamic array is not the same thing as a dynamic memory allocation dynamically allocated array , which is a fixed size Array data structure array whose size is fixed when the array is allocated, although a dynamic array may use such a fixed size array as a back end. ref name java util ArrayList See, for example ... and capacity The simplest dynamic array is constructed by allocating a fixed size array and then dividing it into two parts the first stores the elements of the dynamic array and the second is reserved, or unused. We can then add or remove elements at the end of the dynamic array in constant time ... array contents is its logical size or size , while the size of the underlying array is called the dynamic array s capacity , which is the maximum possible logical size. In applications where the logical size is bounded, this data structure suffices. Resizing the underlying array is an expensive operation, typically involving copying the entire contents of the array. Geometric expansion ... form a geometric progression . Expanding the array by any constant proportion ensures that inserting ... align right class wikitable Linked br list Array data structure Array Dynamic br array Indexing ... ddffdd 0 style background ffdddd n div The dynamic array has performance similar to an array ... cache performance Inserting or deleting an element in the middle of the array linear time Inserting or deleting an element at the end of the array constant amortized time Dynamic arrays benefit from ... to find contiguous space for a large dynamic array, whereas linked lists do not require the whole ... deque implementations use Deque Implementations array deques , which allow amortized constant time ... ref presented a dynamic array algorithm called Tiered Vectors that provided O n sup 1 2 sup performance ... more details
lowercase The array is a wrapper Class computer programming class that provides an Standard Template Library STL like interface to standard fixed size C programming language C arrays. It also overcomes several limitations of standard array. Creation history In his book Generic Programming and the STL ... tt . It is safer and has no worse performance than ordinary arrays. In The C Programming Language, 3rd edition , Bjarne Stroustrup introduces a similar class, called tt c array tt , which Nicolai Josuttis ... tt carray tt . Under the name tt array tt this class is introduced in Boost C Libraries boost libraries ... Array template class is defined in header tt < array> tt in the C standard library and in header ... tt in C 03 with TR1 or tt boost tt . The tt array tt class template is parametrized with a type of element ... Assignable tt requirements. If tt array tt class template is instantiated with a type that fulfills ... access functions. Implementation as aggregate tt array tt class is implemented as an aggregate class. This allows an array to be initialized with a brace enclosing, comma separated list of initializers for the elements of the container, written in increasing subscript order source lang cpp array ... compilers it is possible to use fewer braces according to 8.5.1 11 of the Standard . That is, array can be initialized as follows source lang cpp array int, 4 a 1, 2, 3 source Differences from standard array tt array tt class is a value type. It satisfies tt CopyConstructable tt and tt Assignable tt requirements. tt array tt class can not be implicitly cast to tt T tt or tt T const tt . However there is member function tt data tt that returns a pointer to first element. tt array tt implementation .... Zero sized arrays Unlike standard arrays, tt array tt class can have zero size. The effect of calling tt front tt or tt back tt for a zero sized array is implementation defined ... standard containers tt array tt class does not provide constant time swap. Instead it provides linear ... more details
Unreferenced date December 2009 In computer programming , the stride of an array also increment or step size refers to the number of locations in Computer data storage Primary memory memory between successive Array data structure array elements, measured in byte s or in units of the size of the array s elements. An array with stride 1 has elements which are contiguous in memory. Such arrays are sometimes said to have unit stride . Unit stride arrays are generally more efficient than non unit stride arrays, due to the effects of cache caching . This is attributed to the Locality of reference Principle of Locality , specifically spatial locality. Reasons for non unit stride There are at least two reasons arrays may have a stride larger than their elements width in bytes. First, many languages including C programming language C and C allow structures to be Data structure alignment padded to better take advantage of the word length of the machine. For example source lang c struct ThreeBytesWide char a 3 struct ThreeBytesWide myArray 100 source In the above code snippet, code myArray code might well turn out to have a stride of four bytes, rather than three, if the C code were compiled for a 32 bit architecture, and the compiler had optimized as is usually the case for minimum processing time rather than minimum memory usage. Second, some languages allow arrays of structures to be treated as overlapping parallel array s with non unit stride source lang c include stdio.h struct MyRecord int value char text Print the contents of an array of ints with the given stride void print some ints const int arr, int length, size t stride int i for i 0 i length i printf d n , arr 0 arr int unsigned char arr stride int main void int ints 100 0 struct MyRecord records 100 0 print some ints &ints 0 , 100, sizeof ints 0 print some ints &records 0 .value, 100, sizeof records 0 return 0 source This idiom is a form of type punning . DEFAULTSORT Stride Of An Array Category Arrays Category Articles ... more details
of a computer programmer, an associative array can be viewed as a generalization of an Array data type array . While a regular array maps an integer key Index information technology index to a value of arbitrary data type , an associative array s keys can also be arbitrarily typed. In some programming language s, such as Python programming language Python , the keys of an associative array ...Refimprove date February 2008 An associative array also associative container , map , mapping , dictionary ... array. The relationship between a key and its value is sometimes called a Map mathematics ... code , we say that our array maps code bob code to code 7 code . Associative arrays are very closely ... array are Add Bind a new key to a new value Reassign Bind an old key to a new value Remove ... to a key cleanup section date May 2009 Basic abstract arrays An abstract array structure has two main operations, fetch and store . In the Functional Programming functional specification style, where the entities are array states rather than the array themselves, they are fetch A , I obtains the data stored in the element of the array whose state is A and whose indices I . store A , I , V the array state that results by setting the value of that element to V in array state A . These operations are required to satisfy the axiom s ref Lukham, Suzuki 1979 , Verification of array, record, and pointer operations in Pascal . ACM Transactions on Programming Languages and Systems 1 2 , 226&ndash ... if I J for any array state A , any value V , and any tuples I , J for which the operations ... be used for triangular array s triangular matrix mathematics matrices and other oddly shaped arrays ... array is an array ADT that allows the range of indices to be increased without changing the values ... append code A , x operation that increases the size of the array A by one and then sets the value of the last ... of an associative array, where names are the keys and phone numbers are the values. Using ... more details
In computing , a parallel array is a data structure for representing array data structure array s of Record computer science records . It keeps a separate, homogeneous array for each field of the record, each having the same number of elements. Then, objects located at the same index in each array are implicitly the fields of a single record. Pointers from one object to another are replaced by array indices. This contrasts with the normal approach of storing all fields of each record together in memory. For example, one might declare an array of 100 names, each a string, and 100 ages, each an integer, associating each name with the age that has the same index. An example in C programming language C using parallel arrays source lang c int ages 0, 17, 2, 52, 25 char names None , Mike , Billy , Tom , Stan int parent 0 None , 3 Tom , 1 Mike , 0 None , 3 Tom for i 1 i 4 i printf Name s, Age d ... to each array source lang perl my data first name Joe , Bob , Frank , Hans , last name Smith , Seger ... Programming Language Python source lang python firstName Joe , Bob , Frank , Hans lastName ... issues. For example, one of the fields of the record can be a single bit, and its array would only need ... so that it consumes an entire byte or a word. If the number of items is small, array indices can .... Sequentially examining a single field of each record in the array is very fast on modern machines, since this amounts to a linear traversal of a single array, exhibiting ideal locality of reference ... array . They are expensive to grow or shrink, since each of several arrays must be reallocated ... into groups of fields that are generally accessed together, an array can be constructed for each ... the portions of the structure tied together. An alternative to tying them together using array indexes ... dimensional array by declaring an array of n m size and referring to the r th field in record i as element as array m i r . Some compiler optimization s, particularly for vector processor s, are able ... more details
In computer science and software engineering , a Judy array is a complex but very fast associative array data structure for storing and looking up values using integer or string keys. Unlike normal associative arrayarray s, Judy arrays may be sparse that is, they may have large ranges of unassigned indices. Judy arrays are designed to keep the number of processor cache line fills as low as possible, and the algorithm is internally complex in an attempt to satisfy this goal as often as possible. Due to these cache optimizations, Judy arrays are fast, sometimes even faster than a hash table , especially for very big datasets. Despite Judy arrays being a type of trie , they consume much less memory than hash tables. Also because a Judy array is a trie, it is possible to do an ordered sequential traversal of keys, which is not possible in hash tables. Roughly speaking, it is similar to a highly optimised 256 ary trie data structure. ref Alan Silverstein, http judy.sourceforge.net application shop interm.pdf Judy IV Shop Manual , 2002 ref To make memory consumption small, Judy arrays use more than 20 various compression techniques to compress trie nodes. Judy arrays are also believed to be less vulnerable to algorithmic complexity attack s. ref http www.cs.rice.edu scrosby hash Denial of Service via Algorithmic Complexity Attacks ref The Judy array was invented by Doug Baskins and named after his sister. ref http judy.sourceforge.net ref References reflist External links http judy.sourceforge.net Main Judy arrays site http docs.hp.com en B6841 90001 index.html Programming with Judy C LanguageJudy http judy.sourceforge.net downloads 10minutes.htm How Judy arrays work and why they are so fast http judy.sourceforge.net application shop interm.pdf A complete technical description of Judy arrays http www.nothings.org computer judy An independent performance comparison of Judy to Hash Tables http code.google.com p judyarray A compact implementation of Judy arrays in 1K lines of C ... more details
In computer science , a suffix array is an array data structure array of integers giving the starting positions of suffix computer science suffixes of a string computer science string in lexicographical ... array is the array of the indices of suffixes sorted in lexicographical order. For the string abracadabra , using 1 based array one based indexing, the suffix array is 12,11,8,1,4,6,9,2,5,7,10,3 ... all of those suffixes can also be useful. Algorithms The easiest way to construct a suffix array is to use ... an algorithm for updating the suffix array of a text that has been edited instead of rebuilding a new suffix array from scratch. Even if the theoretical worst case time complexity is math O n log ... the insertion of 500 characters into their dynamic array with a complete rebuild of a static suffix array containing the updated text. Applications The suffix array of a string can be used as an index ... array, and can be found efficiently with a binary search . If implemented straightforwardly ... immediately before W if W is not present in a suffix array with indices stored in pos. pre if W ... to a suffix tree . This began the trend towards compressed suffix array s and BWT based compressed ... 2003 . Simple linear work suffix array construction. In Proc. 30th International Colloquium on Automata, Languages and Programming ICALP 03 . LNCS 2719, Springer, 2003, pp. 943 955. M. Farach 1997 ... Stoye 2005 . An incomplex algorithm for fast suffix array construction . In Proceedings of the 7th ... 24 The Suffix Array 1845 Suffix Array Implementation in Ruby http sary.sourceforge.net index.html.en Suffix array library and tools http duch.mimuw.edu.pl abuczyns kolokacje index en.html Project containing Suffix Array Implementation in Java http pizzachili.dcc.uchile.cl Project containing various Suffix Array c c Implementations with a unified interface http code.google.com p libdivsufsort A fast, lightweight, and robust C API library to construct the suffix array Category Arrays Category Algorithms ... more details
distinguish Triangular matrix Image BellNumberAnimated.gif right thumb The triangular array whose right hand diagonal sequence consists of Bell numbers In mathematics and computing, a triangular array of numbers, polynomials, or the like, is a doubly indexed sequence in which each row is only as long as the row s own index. Notable particular examples include these Bell numbers the Bell triangle , Aitken s array , or the Peirce triangle Bell polynomials Boustrophedon transform Eulerian number Floyd s triangle Hosoya s triangle Lah number Lozani s triangle Narayana number Pascal s triangle Rencontres numbers Romberg s method Stirling numbers of the first kind Stirling numbers of the second kind Triangular arrays of integers in which each row is symmetric and begins and ends with 1 are sometimes called generalized Pascal triangles examples include Pascal s triangle, the Narayana numbers, and the triangle of Eulerian numbers. ref citation last Barry first P. issue 06.2.4 journal J. Integer Sequences pages 1 34 title On integer sequence based constructions of generalized Pascal triangles url http www.emis.ams.org journals JIS VOL9 Barry barry91.pdf volume 9 year 2006 . ref Practical use Apart from the representation of triangular matrix triangular matrices , triangular arrays are used in several algorithm s. One example is the CYK algorithm CKY parsing algorithm for context free grammar s, an example of dynamic programming . See also Triangular number is the number of entries in such an array. References reflist External links mathworld title Number Triangle urlname NumberTriangle math stub computing stub Category Triangles of numbers ... more details
In experiments in which additional factors are not likely to interact with any of the other factors, a saturated array can be used. In a saturated matrix mathematics array , a controllable design of experiments factor is substituted for the interaction of two or more by products. Using a saturated array, a two factor test matrix could be used to test three factors. Using the saturated array allows three factors to be tested in four tests rather than in eight, as would be required by a standard orthogonality orthogonal array. statistics stub Category Design of experiments ... more details
orphan date December 2008 For the DVD magazine, see Array DVD magazine Deleted image removed Image ARRAY magazine.jpg right 150px ARRAY Magazine is a New York based interior design, lifestyle and culture quarterly magazine sponsored by the New York Design Center . It has been published since the winter of 2003 2004. With 40,000 readers, ARRAY is geared toward interior design professionals and their clients. External links http www.arrayny.com ARRAY Homepage Category Interior design Category Quarterly magazines Category Media in New York City Category Publications established in 2003 Category Magazines published in New York art mag stub hu ARRAY Magazine ... more details
unreferenced date December 2010 A bit array also known as a bitmap , a bitset , or a bitstring is an array data structure that compactly stores individual bits boolean value s . It implements a simple set data structure storing a subset of 1,2,..., n and is effective at exploiting bit level parallelism in hardware to perform operations quickly. A typical bit array stores kw bits, where w is the number ... number of places, as well as bitwise negation if necessary. We can view a bit array ... i difference i a i and not b i If we wish to iterate through the bits of a bit array, we can do this efficiently ... Hamming weight If we wish to find the number of 1 bits in a bit array, sometimes called the population ... of an efficient implementation. Sorting Similarly, sorting a bit array is trivial to do in O ... bit arrays, Judy array s, trie s, or even Bloom filter s should be considered instead. Accessing ... common than sequential and the array is relatively small, a byte array may be preferable on a machine with byte addressing. A word array, however, is probably not justified due to the huge space ... them using unary coding , the result is a bit array with a 1 bit in the n th position if and only ... 2 p log 1 p 1, or roughly the term occurs in at least 38 of documents. Language support The C programming language C programming language s bitfield s , pseudo objects found in structs with size equal ... dynamic bitset code class whose size is specified at run time. The D programming language provides ..., but instead returns a code bool code . In Java programming language Java , the class Javadoc SE java util BitSet creates a bit array that is then manipulated with functions named after bitwise operators .... Haskell programming language Haskell likewise currently lacks standard support for bitwise operations ..., including shift and rotate operations and an unboxed array over boolean values may be used to model a Bit array, although this lacks support from the former module. In Perl , strings can be used ... more details
File Aerial antenna.JPG thumb right 250px A multiband US television reception antenna Antenna array may refer to an Interferometry interferometric array of radio telescope s used in radio astronomy a phased array , also known as a smart antenna , an electronically steerable directional antenna typically used in Radar and in wireless communication systems, in view to achieve beamforming , multiple input and multiple output MIMO communication or space time coding See below An antenna array is a group of isotropic radiators such that the currents running through them are of different amplitudes and phases. ref name antenna array These are radiators of EM frequency and energy. Antenna arrays are the solution to the problem defined as the limitations of operating a single antenna. ref name antenna array An example of the problem is that although a dipole antenna allows for better control of direction ... radiators. ref name antenna array There are a few different general types of antenna arrays. When the array is arranged in a straight line this is called a linear array . ref name antenna array Antennas arranged in parallel lines on one plane has a plane array in two dimensions. ref name antenna array Many planes in a group of arrays or antennas results in a three dimensional array . An antenna array may consist of a group of isotropic omni directional radiators. Or, the array may have a group of radiators that are identical. ref name antenna array In a group of identical radiators all the antennas must be share the same orientation in space. ref name antenna array The same orientation results ... orientation ensures polarization in the same direction in space. ref name antenna array cite book ...&pg PA396&dq antenna array v onepage&q antenna 20array&f false isbn 8122404685 ref The gain of an antenna array is typically proportional to the number of individual antennas, but is limited to how accurately they can be phased together for example in a phased array . The loss due to phase ... more details
In MIMO communication systems, array gain means a power gain of transmitted signals that is achieved by using multiple antennas at transmitter and or receiver, with respect to Single Input and Single Output SISO case. It can be simply called power gain . In a broadside array, the array gain is almost exactly proportional to the length of the array. This is the almost always the case provided that the elements of the antenna are not spaced to a point at which large radiation side lobs form in other directions and that the array length exceeds one or two wavlenegths. ref http www.smeter.net daily facts 12 fact5.php ref References reflist See also Diversity gain Category Antennas radio electronics stub ... more details
Array processing is signal processing of the outputs of an array of sensor s to Enhance the signal to interference plus noise ratio SINR compared to that of a single sensor using conventional or adaptive beamforming . Determine the number of emitting sources, the locations of these sources, their waveforms , and other signal parameters. Track multiple moving sources. Array processing is used in radar , sonar , seismic exploration, anti jamming and wireless communications. One of the main advantages of using array processing along with an array of sensors is a smaller foot print. The problems associated with array processing include the number of sources used, their direction of arrival direction of arrivals , and their signal waveforms . ref Torlak, M. http users.ece.utexas.edu bevans courses ee381k lectures 13 Array Processing lecture13 lecture13.pdf Spatial Array Processing . Signal and Image Processing Seminar. University of Texas at Austin. ref See also Phased Array Space Time Adaptive Processing References reflist cite book title Array Signal Processing last1 Johnson first1 D. H. last2 Dudgeon first2 D. E. year 1993 publisher Prentice Hall cite book first1 H. L. last1 Van Trees title Optimum Array Processing publisher Wiley location New York year 2002 cite journal first1 H. last1 Krim first2 M. last2 Viberg url http www.vissta.ncsu.edu publications ahk spm1996.pdf title Two Decades of Array Signal Processing Research journal IEEE Signal Processing Magazine pages 67 94 month July year 1996 accessdate 8 December 2010 S. Haykin and K.J.R. Liu Editors , Handbook on Array Processing and Sensor Networks , Adaptive and Learning Systems for Signal Processing, Communications, and Control Series, 2010. E. Tuncer and B. Friedlander Editors , Classical and Modern Direction of Arrival Estimation , Academic Press, 2010. A.B. Gershman, http www.nts.tu darmstadt.de nt fileadmin nas lehre SS 08 PS Smart Antennas slides proj sem.pdf array processing courseware DEFAULTSORT Array Processing ... more details
Unreferenced stub auto yes date December 2009 A sensor array is a set of several sensors used to gather information. Usually the sensors and sensed phenomenon are both directional in nature, but this isn t always the case. Sometimes the data varies by position but not by direction. DEFAULTSORT Sensor Array Category Sensors Electronics stub ... more details
In computer science , a sparse array is an Array data structure array in which most of the elements have the same value known as the default value usually 0 or nullable type null . A naive implementation of an array may allocate space for the entire array, but in the case where there are few non default values, this implementation is inefficient. Typically the algorithm used instead of an ordinary array is determined by other known features or statistical features of the array, for instance if the sparsity is known in advance, or if the elements are arranged according to some function e.g. occur in blocks . As an example, a spreadsheet containing 100 100 mostly empty cells might be more efficiently stored as a linked list rather than an array containing ten thousand array elements. A heap malloc memory allocator inside a program might choose to store regions of blank space inside a linked list rather than storing all of the allocated regions in, say a bit array . so what? blank space is not an indexed array sparse or not , indeed See also Sparse matrix External links http boost.org libs numeric ublas doc vector sparse.htm Boost sparse vector class http portal.acm.org citation.cfm?id 1363086&jmp cit&coll GUIDE&dl GUIDE Rodolphe Buda, Two Dimensional Aggregation Procedure An Alternative to the Matrix Algebraic Algorithm , Computational Economics , 31 4 , May, pp.397 408, 2008. Category Arrays datastructure stub ru ... more details
A Commission of Array was a Letters patent commission given by England English royalty to officers or gentry in a given territory to muster and array the inhabitants and to see them in a condition for war, or to put soldier s of a country in a condition for military service. The term arrayers is used in some ancient English statutes, for an officer who had a Commission of Array. Commissions of array developed from the ancient obligation of all free men to defend their country. Commissioners were usually experienced soldiers, appointed by the crown to array able bodied men from each shire. By the time of the Wars of the Roses conscript levies were less important than troops raised by indenture. Though obsolete by the 17th century, the system was revived by Charles I of England Charles I in 1642 in opposition to the 1641 Militia Ordinance that gave Parliament of England Parliament control of raising troops in order to muster a Cavalier Royalist army at the onset of the English Civil War . See also Arrayer Posse comitatus common law Posse comitatus References 1828 Webster s Dictionary 1728 http digicoll.library.wisc.edu cgi bin HistSciTech HistSciTech idx?type turn&entity HistSciTech000900240187&isize L DEFAULTSORT Commission Of Array Category English Civil War Category Military history of the United Kingdom Category Command staff occupations England stub Mil hist stub UK hist stub th ... more details
In computer architecture , a systolic array is a pipe network arrangement of processing units called ... array is composed of matrix like rows of data processing units called cells. Data processing units ... , ref The Paracel GeneMatcher series of systolic array processors do have a program counter. More complicated .... The systolic array is often rectangular where data flows across the array between neighbour ... the ports of the array are generated by auto sequencing memory units, ASMs. Each ASM includes ... math matrix is fed in a row at a time from the top of the array and is passed down the array, the other matrix is fed in a column at a time from the left hand side of the array and passes from left ... column. At this point, the result of the multiplication is stored in the array and can now be output a row or a column at a time, flowing down or across the array. Systolic arrays are arrays of DPUs ... a sequence of operations on data that flows between them. Because the traditional systolic array ... wavefront arrays . One well known systolic array is Carnegie Mellon University s iWarp processor, which has been manufactured by Intel. An iWarp system has a linear array processor connected by data buses going in both directions. History The systolic array paradigm, data stream driven by data ... driven by a program counter. Because a systolic array usually sends and receives multiple data streams ... is math y ... a n x a n 1 x a n 2 x a n 3 x ... a 1 x a 0 math A linear systolic array in which ... to build Super Systolic Array The super systolic array is a generalization of the systolic array ... Kress has introduced the generalized systolic array the super systolic array. Its application is not restricted ... version of the super systolic array. More information about the background may be obtained from the articles about Systolic array, Reconfigurable Computing , Configware Compiler , super systolic array and Configware Software Co Compilation Configware Software Co Compiler . Because of the wide ... more details
Orphan date February 2009 Context date October 2009 A processor array is like a storage array but contains and manages processing elements instead of storage elements. The processor array should have the following characteristics Should support forty or more processing elements blades per chassis The chassis should support the use of commodity motherboard s The chassis should only backplane power and management capabilities to extend the life of the chassis and reduce chassis change costs Will provide end to end redundant power Each processing element should support two or more redundant virtualized I O connections Category Computer hardware Category Fault tolerant computer systems tech stub ... more details
Unreferenced date December 2009 A macrocell array is an approach to the design and manufacture of Application specific integrated circuit ASIC s. Essentially, it is a small step up from the otherwise similar gate array , but rather than being a prefabricated array of simple logic gates, the macrocell array is a prefabricated array of higher level logic functions such as Flip flop electronics flip flop s, Arithmetic logic unit ALU functions, Hardware register register s, and the like. These logic functions are simply placed at regular predefined positions and manufactured on a wafer electronics wafer , usually called master slice . Creation of a circuit with a specified function is accomplished by adding metal interconnects to the chips on the master slice late in the manufacturing process, allowing the function of the chip to be customised as desired. Macrocell array master slices are usually prefabricated and stockpiled in large quantities regardless of customer orders. The fabrication according to the individual customer specifications may be finished in a shorter time compared with standard cell or full custom design. The macrocell array approach reduces the Photomask mask costs since fewer custom masks need to be produced. In addition manufacturing test tooling lead time and costs are reduced since the same test fixtures may be used for all macrocell array products manufactured on the same die manufacturing die size. Drawbacks are somewhat low density and performance than other approaches to ASIC design. However this style is often a viable approach for low production volumes. DEFAULTSORT Macrocell Array Category Gate arrays es Matriz de macroc lulas ... more details
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