Improved Methods for Signature-Tree Construction
نویسندگان
چکیده
منابع مشابه
Improved Methods for Signature-Tree Construction
Signature-based tree structures which have been proposed in the past do not perform well for large databases. The problem arises from the fact that they are incapable of pruning searching, especially at the upper tree levels, and thus they have decreased selectivities. In this paper, we locate a number of reasons for this problem and propose several methods for node splitting and partial-tree r...
متن کاملComputerized fault tree construction for improved reliability analysis
Fault Tree Analysis is a well-known method for reliability evaluation of systems. However, manual construction of fault trees is a tedious and time-consuming task. Thus, many researchers tried to get benefit of high speed and accuracy of digital computers to automate this process. Automated construction of fault trees can be very useful in system reliability analysis, especially in design step,...
متن کاملDistance Based Methods in Phylogentic Tree Construction
One of the most fundamental aspects of bioinformatics in understanding sequence evolution and relationships is molecular phylogenetics, in which the evolutionary histories of living organisms are represented by finite directed (weighted) graphs, in particular, directed (weighted) trees. There are basically two types of phylogenetic methods, distance based methods and character based methods. Di...
متن کاملislanding detection methods for microgrids
امروزه استفاده از منابع انرژی پراکنده کاربرد وسیعی یافته است . اگر چه این منابع بسیاری از مشکلات شبکه را حل می کنند اما زیاد شدن آنها مسائل فراوانی برای سیستم قدرت به همراه دارد . استفاده از میکروشبکه راه حلی است که علاوه بر استفاده از مزایای منابع انرژی پراکنده برخی از مشکلات ایجاد شده توسط آنها را نیز منتفی می کند . همچنین میکروشبکه ها کیفیت برق و قابلیت اطمینان تامین انرژی مشترکان را افزایش ...
15 صفحه اولImproved Construction Methods for Error Correcting Constant Weight Codes
Two construction methods for t error correcting constant weight codes are developed. Both of these methods are improvements over the existing codes. One construction is recursive, which is based on the observation that a 2t error correcting code can be built by concatenating two t error correcting codes. This results in the reduction of code word length for higher t values. The other constructi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Computer Journal
سال: 2000
ISSN: 0010-4620,1460-2067
DOI: 10.1093/comjnl/43.4.301