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#книга Simovici D. A. CLUSTERING: Theoretical and Practical Aspects. – World Scientific, 2021. Неплохая книга по кластеризации - для любителей жёсткой теории, сначала даётся большой математический обзор: ЧУМ, энтропия, выпуклые множества, гиперграфы, мультимножества (выше был пост про обобщённую энтропию - там рисунки из этой книги), потом уже разбираются алгоритмы кластеризации. Много теорем с доказательствами. Примеры кода на python и R (тут на чём удобнее, на том автор и писал). В приложении опять много математики: спектральные функции, проблема NP-полноты и т.п. Из минусов: нет как примеров практических кейсов кластеризации, так и каких-то советов для практиков.
#книга Simovici D. A. CLUSTERING: Theoretical and Practical Aspects. – World Scientific, 2021. Неплохая книга по кластеризации - для любителей жёсткой теории, сначала даётся большой математический обзор: ЧУМ, энтропия, выпуклые множества, гиперграфы, мультимножества (выше был пост про обобщённую энтропию - там рисунки из этой книги), потом уже разбираются алгоритмы кластеризации. Много теорем с доказательствами. Примеры кода на python и R (тут на чём удобнее, на том автор и писал). В приложении опять много математики: спектральные функции, проблема NP-полноты и т.п. Из минусов: нет как примеров практических кейсов кластеризации, так и каких-то советов для практиков.
Meanwhile, a completely redesigned attachment menu appears when sending multiple photos or vides. Users can tap "X selected" (X being the number of items) at the top of the panel to preview how the album will look in the chat when it's sent, as well as rearrange or remove selected media. If you initiate a Secret Chat, however, then these communications are end-to-end encrypted and are tied to the device you are using. That means it’s less convenient to access them across multiple platforms, but you are at far less risk of snooping. Back in the day, Secret Chats received some praise from the EFF, but the fact that its standard system isn’t as secure earned it some criticism. If you’re looking for something that is considered more reliable by privacy advocates, then Signal is the EFF’s preferred platform, although that too is not without some caveats. Oleksandra Matviichuk, a Kyiv-based lawyer and head of the Center for Civil Liberties, called Durov’s position "very weak," and urged concrete improvements. Additionally, investors are often instructed to deposit monies into personal bank accounts of individuals who claim to represent a legitimate entity, and/or into an unrelated corporate account. To lend credence and to lure unsuspecting victims, perpetrators usually claim that their entity and/or the investment schemes are approved by financial authorities. Either way, Durov says that he withdrew his resignation but that he was ousted from his company anyway. Subsequently, control of the company was reportedly handed to oligarchs Alisher Usmanov and Igor Sechin, both allegedly close associates of Russian leader Vladimir Putin.
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