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Catboost
CatBoost is an open-source software library developed by Yandex. It provides a gradient boosting framework which among other features attempts to solve for Categorical features using a permutation driven alternative compared to the classical algorithm. It works on Linux, Windows, macOS, and is available in Python, R, and models built using catboost can be used for predictions in C++, Java, C#, Rust, Core ML, ONNX, and PMML. The source code is licensed under Apache License and available on GitHub. ''InfoWorld'' magazine awarded the library "The best machine learning tools" in 2017. along with TensorFlow, Pytorch, XGBoost and 8 other libraries. Kaggle listed CatBoost as one of the most frequently used Machine Learning (ML) frameworks in the world. It was listed as the top-8 most frequently used ML framework in the 2020 survey and as the top-7 most frequently used ML framework in the 2021 survey. As of April 2022, CatBoost is installed about 100000 times per day from PyPI re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gradient Boosting
Gradient boosting is a machine learning technique used in regression and classification tasks, among others. It gives a prediction model in the form of an ensemble of weak prediction models, which are typically decision trees. When a decision tree is the weak learner, the resulting algorithm is called gradient-boosted trees; it usually outperforms random forest. A gradient-boosted trees model is built in a stage-wise fashion as in other boosting methods, but it generalizes the other methods by allowing optimization of an arbitrary differentiable loss function. History The idea of gradient boosting originated in the observation by Leo Breiman that boosting can be interpreted as an optimization algorithm on a suitable cost function. Explicit regression gradient boosting algorithms were subsequently developed, by Jerome H. Friedman, simultaneously with the more general functional gradient boosting perspective of Llew Mason, Jonathan Baxter, Peter Bartlett and Marcus Frean. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gradient Boosting
Gradient boosting is a machine learning technique used in regression and classification tasks, among others. It gives a prediction model in the form of an ensemble of weak prediction models, which are typically decision trees. When a decision tree is the weak learner, the resulting algorithm is called gradient-boosted trees; it usually outperforms random forest. A gradient-boosted trees model is built in a stage-wise fashion as in other boosting methods, but it generalizes the other methods by allowing optimization of an arbitrary differentiable loss function. History The idea of gradient boosting originated in the observation by Leo Breiman that boosting can be interpreted as an optimization algorithm on a suitable cost function. Explicit regression gradient boosting algorithms were subsequently developed, by Jerome H. Friedman, simultaneously with the more general functional gradient boosting perspective of Llew Mason, Jonathan Baxter, Peter Bartlett and Marcus Frean. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yandex
Yandex LLC (russian: link=no, Яндекс, p=ˈjandəks) is a Russian multinational technology company providing Internet-related products and services, including an Internet search engine, information services, e-commerce, transportation, maps and navigation, mobile applications, and online advertising. It primarily serves audiences in Russia and the Commonwealth of Independent States of the former Soviet Union, and has more than 30 offices worldwide. The firm is the largest technology company in Russia and the second largest search engine on the Internet in Russian, with a market share of over 42%. It also has the largest market share of any search engine from Europe and the Commonwealth of Independent States and is the 5th largest search engine worldwide after Google, Bing, Yahoo!, and Baidu. Its main competitors on the Russian market are Google, VK, and Rambler. Yandex LLC's holding company, Yandex N.V., is registered in Amsterdam, the Netherlands as a '' naamloze vennoots ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Careem
Careem is a Dubai-based super app with operations in over 100 cities, covering 12 countries across the Middle East, Africa, and South Asia regions. The company, which was valued at over billion in 2018, became a wholly-owned subsidiary of Uber after being acquired for $3.1 billion in January 2020. Careem expanded into the food delivery business with Careem Now in November 2018 and launched a digital payment platform, Careem Pay in April 2022. History Careem was founded by Mudassir Sheikha, an American of Pakistani origin and Magnus Olsson of Sweden, who had both worked as management consultants at McKinsey & Company. It started operating in July 2012 as a website-based service for corporate car bookings, and evolved to become a ridesharing company with car hire for everyday use. In 2015, the company acquired a Saudi-based home service company and Abdulla Elyas joined Careem. In 2017, the company announced a program to extend maternity leave and hire more women. In June 201 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cloudflare
Cloudflare, Inc. is an American content delivery network and DDoS mitigation company, founded in 2009. It primarily acts as a reverse proxy between a website's visitor and the Cloudflare customer's hosting provider. Its headquarters are in San Francisco, California. According to '' The Hill'', it is used by more than 20 percent of the entire Internet for its web security services. History Cloudflare was founded in July 2009 by Matthew Prince, Lee Holloway, and Michelle Zatlyn. Prince and Holloway had previously collaborated on Project Honey Pot, a product of Unspam Technologies that served as some inspiration for the basis of Cloudflare. From 2009, the company was venture-capital funded. On August 15, 2019, Cloudflare submitted its S-1 filing for IPO on the New York Stock Exchange under the stock ticker NET. It opened for public trading on September 13, 2019 at $15 per share. In 2020, Cloudflare co-founder and COO Michelle Zatlyn was named president, making her one of the few ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JetBrains
JetBrains s.r.o. (formerly IntelliJ Software s.r.o.) is a Czech software development company which makes tools for software developers and project managers. , the company has offices in Prague; Munich; Berlin; Boston, Massachusetts; Amsterdam; Foster City, California; Marlton, New Jersey; and Shanghai. The company offers integrated development environments (IDEs) for the programming languages Java, Groovy, Kotlin, Ruby, Python, PHP, C, Objective-C, C++, C#, F#, Go, JavaScript, and the domain-specific language SQL. The company created the Kotlin programming language, which can run in a Java virtual machine (JVM), in 2011. ''InfoWorld'' magazine awarded the firm "Technology of the Year Award" in 2011 and 2015. History JetBrains, initially called IntelliJ Software, was founded in 2000 in Prague by three Russian software developers: Sergey Dmitriev, Valentin Kipyatkov and Eugene Belyaev. The company's first product was IntelliJ Renamer, a tool for code refactoring in J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Categorical Variable
In statistics, a categorical variable (also called qualitative variable) is a variable that can take on one of a limited, and usually fixed, number of possible values, assigning each individual or other unit of observation to a particular group or nominal category on the basis of some qualitative property. In computer science and some branches of mathematics, categorical variables are referred to as enumerations or enumerated types. Commonly (though not in this article), each of the possible values of a categorical variable is referred to as a level. The probability distribution associated with a random categorical variable is called a categorical distribution. Categorical data is the statistical data type consisting of categorical variables or of data that has been converted into that form, for example as grouped data. More specifically, categorical data may derive from observations made of qualitative data that are summarised as counts or cross tabulations, or from observations o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MatrixNet
MatrixNet is a proprietary machine learning algorithm developed by Yandex and used widely throughout the company products. The algorithm is based on gradient boosting Gradient boosting is a machine learning technique used in regression and classification tasks, among others. It gives a prediction model in the form of an ensemble of weak prediction models, which are typically decision trees. When a decision t ... and was introduced since 2009.MatrixNet: New Level of Search Quality Retrieved 2015-12-24. Application CERN is using the algorithm to analyze and search through the colossal data outputs generated by the use of the[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oblivious Data Structure
: In computer science, an oblivious data structure is a data structure that gives no information about the sequence or pattern of the operations that have been applied except for the final result of the operations.Xiao Wang, Kartik Nayak, Chang Liu, Hubert Chan, Elaine Shi, Emil Stefanov and Yan Huang. Oblivious Data Structures. Proceedings of the 2014 ACM SIGSAC Conference on Computer and Communications Security In most conditions, even if the data is encrypted, the access pattern can be achieved, and this pattern can leak some important information such as encryption keys. And in the outsourcing of cloud data, this leakage of access pattern is still very serious. An access pattern is a specification of an access mode for every attribute of a relation schema. For example, the sequences of user read or write the data in the cloud are access patterns. We say a machine is oblivious if the sequence in which it accesses is equivalent for any two inputs with the same running time. So t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PyPI
The Python Package Index, abbreviated as PyPI () and also known as the Cheese Shop (a reference to the ''Monty Python's Flying Circus'' sketch " Cheese Shop"), is the official third-party software repository for Python. It is analogous to the CPAN repository for Perl and to the CRAN repository for R. PyPI is run by the Python Software Foundation, a charity. Some package managers, including pip, use PyPI as the default source for packages and their dependencies. more than 350,000 Python packages can be accessed through PyPI. PyPI primarily hosts Python packages in the form of archives called (source distributions) or precompiled "wheels." PyPI as an index allows users to search for packages by keywords or by filters against their metadata, such as free software license or compatibility with POSIX. A single entry on PyPI is able to store, aside from just a package and its metadata, previous releases of the package, precompiled wheels (e.g. containing DLLs on Windows), as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaggle
Kaggle, a subsidiary of Google LLC, is an online community of data scientists and machine learning practitioners. Kaggle allows users to find and publish data sets, explore and build models in a web-based data-science environment, work with other data scientists and machine learning engineers, and enter competitions to solve data science challenges. Kaggle was first launched in 2010 by offering machine learning competitions and now also offers a public data platform, a cloud-based workbench for data science, and Artificial Intelligence education. Its key personnel were Anthony Goldbloom and Jeremy Howard. Nicholas Gruen was the founding chair succeeded by Max Levchin. Equity was raised in 2011 valuing the company at $25.2 million. On 8 March 2017, Google announced that they were acquiring Kaggle. Kaggle community In June 2017, Kaggle claimed it surpassed 1 million registered users and as of 2021 over 8 million. The users come from 194 countries. By March 2017, the Two Sigma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
