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constraint

constraint子句是指限制和索引相似,虽然限制也能被用于建立和另一个表的关联。用ALTERTABLE和CREATETABLE语句中的constraint子句来建立或删除条件.constraint子句可分为两种类型:第一种是在单一字段上创建条件;第二种是在一个以上的字段上创建条件。
  • This paper presents an interactive technique that produces static hairstyles by generating individu

    This paper presents an interactive technique that produces static hairstyles by generating individual hair strands of the desired shape and color, subject to the presence of gravity and collisions. A variety of hairstyles can be generated by adjusting the wisp parameters, while the deformation is solved efficiently, accounting for the effects of gravity and collisions. Wisps are generated employing statistical approaches. As for hair deformation, we propose a method which is based on physical simulation concepts but is simplified to efficiently solve the static shape of hair. On top of the statistical wisp model and the deformation solver, a constraint-based styler is proposed to model artificial features that oppose the natural flow of hair under gravity and hair elasticity, such as a hairpin. Our technique spans a wider range of human hairstyles than previously proposed methods, and the styles generated by this technique are fairly realistic.

    标签: interactive hairstyles generating technique

    上传时间: 2013-12-20

    上传用户:sssl

  • This function provides an ARMA spectral estimate which is maximum entropy satisfying correlation con

    This function provides an ARMA spectral estimate which is maximum entropy satisfying correlation constraint (number of poles)and cepstrum constrains (number of ceros)

    标签: correlation satisfying function estimate

    上传时间: 2013-12-21

    上传用户:朗朗乾坤

  • This package provides encoders and fast Viterbi decoders for the NASA standard rate 1/2 and rate 1/

    This package provides encoders and fast Viterbi decoders for the NASA standard rate 1/2 and rate 1/3 constraint length 7 convolutional codes.

    标签: rate and encoders decoders

    上传时间: 2013-12-18

    上传用户:彭玖华

  • Because WDM networks are circuit switched loss networks blocking may occur because of lack of resour

    Because WDM networks are circuit switched loss networks blocking may occur because of lack of resources. Also in circuit switched networks many paths use the same links. This toolbox answers the question how different paths with different loads influence on each other and what is the blocking on each of the defined path. Toolbox is capable of computing blocking for three different WDM network types: with no wavelength conversion, with full wavelength conversion and with limited range wavelength conversion. It is worth noting that case for full conversion can be usefull for any circuit switched network without additional constraints (i.e. wavelength continuity constraint in WDM), for example telephone network. Toolbox contains also scripts for defining network structures (random networks, user defined networks) and traffic matrixes. Three graph algorithms for shortest path computation are also in this toolbox (they are used for traffic matrix creation).

    标签: networks blocking switched Because

    上传时间: 2017-07-28

    上传用户:zhangzhenyu

  • I was pleasantly surprised when in November 2005 a message arrived from Wayne Wheeler, the new comp

    I was pleasantly surprised when in November 2005 a message arrived from Wayne Wheeler, the new computer science editor of Springer Verlag, notifying me that he in tends to qualify this book as a Springer major reference work (MRW), thereby releasing past restrictions on page counts, freeing me from the constraint of having to compress my style, and making it possible to include important and interesting data compression methods that were either ignored or mentioned in passing in previous editions.

    标签: pleasantly surprised November arrived

    上传时间: 2014-12-22

    上传用户:qilin