UTM parameters - Wikipedia
Urchin Tracking Module (UTM) parameters are five variants of URL parameters used by marketers to track the effectiveness of online marketing campaigns across traffic sources and publishing media. They were introduced by Google Analytics' predecessor Urchin and, consequently, are supported out-of-the-box by Google Analytics. The UTM parameters in a URL identify the campaign that refers traffic to a
Time-based one-time password - Wikipedia
Time-based one-time password (TOTP) is a computer algorithm that generates a one-time password (OTP) using the current time as a source of uniqueness. As an extension of the HMAC-based one-time password algorithm (HOTP), it has been adopted as Internet Engineering Task Force (IETF) standard RFC 6238.[1] TOTP is the cornerstone of Initiative for Open Authentication (OATH), and is used in a number o
Apache Parquet - Wikipedia
Apache Parquet is a free and open-source column-oriented data storage format in the Apache Hadoop ecosystem. It is similar to RCFile and ORC, the other columnar-storage file formats in Hadoop, and is compatible with most of the data processing frameworks around Hadoop. It provides efficient data compression and encoding schemes with enhanced performance to handle complex data in bulk. History[edit
Learning to rank - Wikipedia
Learning to rank[1] or machine-learned ranking (MLR) is the application of machine learning, typically supervised, semi-supervised or reinforcement learning, in the construction of ranking models for information retrieval systems.[2] Training data may, for example, consist of lists of items with some partial order specified between items in each list. This order is typically induced by giving a nu
Correlation - Wikipedia
This article is about correlation and dependence in statistical data. For other uses, see Correlation (disambiguation). Several sets of (x, y) points, with the Pearson correlation coefficient of x and y for each set. The correlation reflects the noisiness and direction of a linear relationship (top row), but not the slope of that relationship (middle), nor many aspects of nonlinear relationships (
Composition over inheritance - Wikipedia
This diagram shows how the fly and sound behavior of an animal can be designed in a flexible way by using the composition over inheritance design principle.[1] Composition over inheritance (or composite reuse principle) in object-oriented programming (OOP) is the principle that classes should favor polymorphic behavior and code reuse by their composition (by containing instances of other classes t
FM-index - Wikipedia
In computer science, an FM-index is a compressed full-text substring index based on the Burrows–Wheeler transform, with some similarities to the suffix array. It was created by Paolo Ferragina and Giovanni Manzini,[1] who describe it as an opportunistic data structure as it allows compression of the input text while still permitting fast substring queries. The name stands for Full-text index in Mi
Needleman–Wunsch algorithm - Wikipedia
Choosing a scoring system[edit] Next, decide how to score each individual pair of letters. Using the example above, one possible alignment candidate might be: 12345678 GCATG-CG G-ATTACA The letters may match, mismatch, or be matched to a gap (a deletion or insertion (indel)): Match: The two letters at the current index are the same. Mismatch: The two letters at the current index are different. Ind
Levenshtein distance - Wikipedia
Edit distance matrix for two words using cost of substitution as 1 and cost of deletion or insertion as 0.5 In information theory, linguistics, and computer science, the Levenshtein distance is a string metric for measuring the difference between two sequences. The Levenshtein distance between two words is the minimum number of single-character edits (insertions, deletions or substitutions) requir
Correspondence analysis - Wikipedia
Correspondence analysis (CA) is a multivariate statistical technique proposed[1] by Herman Otto Hartley (Hirschfeld)[2] and later developed by Jean-Paul Benzécri.[3] It is conceptually similar to principal component analysis, but applies to categorical rather than continuous data. In a similar manner to principal component analysis, it provides a means of displaying or summarising a set of data in
Rubber duck debugging - Wikipedia
A rubber duck in use by a developer to aid debugging In software engineering, rubber duck debugging (or rubberducking) is a method of debugging code by articulating a problem in spoken or written natural language. The name is a reference to a story in the book The Pragmatic Programmer in which a programmer would carry around a rubber duck and debug their code by forcing themselves to explain it, l
MinHash - Wikipedia
In computer science and data mining, MinHash (or the min-wise independent permutations locality sensitive hashing scheme) is a technique for quickly estimating how similar two sets are. The scheme was invented by Andrei Broder (1997),[1] and initially used in the AltaVista search engine to detect duplicate web pages and eliminate them from search results.[2] It has also been applied in large-scale
w-shingling - Wikipedia
This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (March 2023) (Learn how and when to remove this message) In natural language processing a w-shingling is a set of unique shingles (therefore n-grams) each of which is composed of con
Log-structured merge-tree - Wikipedia
In computer science, the log-structured merge-tree (also known as LSM tree, or LSMT[1]) is a data structure with performance characteristics that make it attractive for providing indexed access to files with high insert volume, such as transactional log data. LSM trees, like other search trees, maintain key-value pairs. LSM trees maintain data in two or more separate structures, each of which is o
Objectives and key results - Wikipedia
Objectives and key results (OKR, alternatively OKRs) is a goal-setting framework used by individuals, teams, and organizations to define measurable goals and track their outcomes. The development of OKR is generally attributed to Andrew Grove who introduced the approach to Intel in the 1970s[1] and documented the framework in his 1983 book High Output Management. OKRs comprise an objective (a sign
Bill Inmon - Wikipedia
This biography of a living person needs additional citations for verification. Please help by adding reliable sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately from the article and its talk page, especially if potentially libelous. Find sources: "Bill Inmon" – news · newspapers · books · scholar · JSTOR (June 2016) (Learn how and whe
リリース、障害情報などのサービスのお知らせ
最新の人気エントリーの配信
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
N2 chart - Wikipedia
List of job scheduler software - Wikipedia)
Null (SQL) - Wikipedia
Waldronville - Wikipedia