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Карпов Максим Евгеньевич

Факультет компьютерных наук

Профиль на hse.ru ↗ тел.: 27240
Публикаций
123
Языков
2
Наград
8
Конференций
1
Профиль Публикации (123) Курсы (31)

Профессиональные интересы

машинное обучениеанализ данныхглубинное обучение

Должности

  • Старший преподаватель — Факультет компьютерных наук, Департамент больших данных и информационного поиска

Био

  • · Начал работать в НИУ ВШЭ в 2017 году.
  • · Научно-педагогический стаж: 7 лет.

Образование

  • 2022 · Аспирантура: Национальный исследовательский университет "Высшая школа экономики", специальность «Информатика и вычислительная техника», квалификация «Исследователь. Преподаватель-исследователь»
  • 2020 · Магистратура: Национальный исследовательский университет "Высшая школа экономики", факультет: компьютерных наук, специальность «Прикладная математика и информатика», квалификация «Магистр»
  • 2014 · Специалитет: Московский государственный университет им. М.В. Ломоносова, факультет: глобальных процессов, специальность «Международные отношения», квалификация «Специалист в области международных отношений»

Опыт работы

  • · 09.2021: наст.время старший преподаватель Департамента больших данных и информационного поиска ФКН
  • · 04.2019 – 08.2021: преподаватель Департамента больших данных и информационного поиска ФКН
  • · 03.2021 – 08.2024: младший научный сотрудник лаборатории LAMBDA
  • · 10.2017 – 03.2021: стажер-исследователь лаборатории LAMBDA

Награды и поощрения

  • · Благодарность первого проректора НИУ ВШЭ (август 2024)
  • · Благодарность старшего директора по основным образовательным программам НИУ ВШЭ (май 2023)
  • · Благодарственное письмо проректора НИУ ВШЭ (сентябрь 2022)
  • · Надбавка за публикацию в журнале из Списка А (и приравненном к нему научном издании) (2023–2024)
  • · Надбавка за публикацию в международном рецензируемом научном издании (2022–2023, 2021–2022)
  • · Надбавка за регулярные публикации в международных рецензируемых научных изданиях (2025–2030, 2024–2029)
  • · Лучший преподаватель — 2025
  • · Группа высокого профессионального потенциала (кадровый резерв НИУ ВШЭ)Категория "Новые исследователи" (2019)

Гранты и проекты

  • 2022 · Исполнитель по гранту РФФИ «‎Проекты фундаментальных научных исследований, выполняемые молодыми учеными, обучающимися в аспирантуре» № заявки 20-37-90136, тема проекта: «‎Разработка методов обработки естественного языка для обнаружения аномалий в журналах событий систем хранения больших данных» (2020 - 2022 гг.) под руководством заведующего лабораторией Устюжанина Андрея Евгеньевича.

Конференции (1)

Показать все
  • · 2022: 46-я школа-конференция ИППИ РАН «Информационные технологии и системы» (ИТиС-2022) (Огниково Московской области). Доклад: Predicting a Next Activity in Event Logs: an Approach based on LSTMs and Gradient Boosting

Идентификаторы исследователя

Публикации (123)

Study of B+c decays to charmonia and three light hadrons

2022 · ARTICLE · en

Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1 collected with the LHCb detector, seven decay modes of the B+cBc+ meson into a J/ψ or ψ(2S) meson and three charged hadrons, kaons or pions, are studied. The decays B+cBc+ → (ψ(2S) → J/ψπ+π−)π+, B+cBc+ → ψ(2S)π+π−π+, B+cBc+ → J/ψK+π−π+ and B+cBc+ → J/ψK+K−K+ are observed for the first time, and evidence for the B+cBc+ → ψ(2S)K+K−π+, decay is found, where J/ψ and ψ(2S) mesons are reconstructed in their dimuon decay modes. The ratios of branching fractions between the different B+cBc+ decays are reported as well as the fractions of the decays proceeding via intermediate resonances. The results largely support the factorisation approach used for a theoretical description of the studied decays.

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Study of coherent J/ψ production in lead-lead collisions at sNN−−−√ = 5 TeV

2022 · ARTICLE · en

Coherent production of J/ψ mesons is studied in ultraperipheral lead-lead collisions at a nucleon-nucleon centre-of-mass energy of 5 TeV, using a data sample collected by the LHCb experiment corresponding to an integrated luminosity of about 10 μb−1. The J/ψ mesons are reconstructed in the dimuon final state and are required to have transverse momentum below 1 GeV. The cross-section within the rapidity range of 2.0 4.5 is measured to be 4.45 ± 0.24 ± 0.18 ± 0.58 mb, where the first uncertainty is statistical, the second systematic and the third originates from the luminosity determination. The cross-section is also measured in J/ψ rapidity intervals. The results are compared to predictions from phenomenological models.

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Study of the doubly charmed tetraquark T+cc

2022 · ARTICLE · en

Quantum chromodynamics, the theory of the strong force, describes interactions of coloured quarks and gluons and the formation of hadronic matter. Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states. Here a study is reported of an exotic narrow state in the D0D0π+ mass spectrum just below the D*+D0 mass threshold produced in proton-proton collisions collected with the LHCb detector at the Large Hadron Collider. The state is consistent with the ground isoscalar T+ccTcc+ tetraquark with a quark content of ccu¯¯¯d¯¯¯ccu¯d¯ and spin-parity quantum numbers JP = 1+. Study of the DD mass spectra disfavours interpretation of the resonance as the isovector state. The decay structure via intermediate off-shell D*+ mesons is consistent with the observed D0π+ mass distribution. To analyse the mass of the resonance and its coupling to the D*D system, a dedicated model is developed under the assumption of an isoscalar axial-vector T+ccTcc+ state decaying to the D*D channel. Using this model, resonance parameters including the pole position, scattering length, effective range and compositeness are determined to reveal important information about the nature of the T+ccTcc+ state. In addition, an unexpected dependence of the production rate on track multiplicity is observed.

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Study of Z Bosons Produced in Association with Charm in the Forward Region

2022 · ARTICLE · en

Events containing a Z boson and a charm jet are studied for the first time in the forward region of proton-proton collisions. The data sample used corresponds to an integrated luminosity of 6 fb−1 collected at a center-of-mass energy of 13 TeV with the LHCb detector. In events with a Z boson and a jet, the fraction of charm jets is determined in intervals of Z-boson rapidity in the range 2.0

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Tests of Lepton Universality Using B0→K0Sℓ+ℓ− and B+→K*+ℓ+ℓ− Decays

2022 · ARTICLE · en

Tests of lepton universality in B0→K0Sℓ+ℓ− and B+→K*+ℓ+ℓ− decays where ℓ is either an electron or a muon are presented. The differential branching fractions of B0→K0Se+e− and B+→K*+e+e− decays are measured in intervals of the dilepton invariant mass squared. The measurements are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1 . The results are consistent with the standard model and previous tests of lepton universality in related decay modes. The first observation of B0→K0Se+e− and B+→K*+e+e− decays is reported.

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Angular Analysis of D0→π+π−μ+μ− and D0→K+K−μ+μ− Decays and Search for CP Violation

2022 · ARTICLE · en

The first full angular analysis and an updated measurement of the decay-rate CP asymmetry of the D0→π+π−μ+μ− and D0→K+K−μ+μ− decays are reported. The analysis uses proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. The dataset corresponds to an integrated luminosity of 9 fb−1. The full set of CP -averaged angular observables and their CP asymmetries are measured as a function of the dimuon invariant mass. The results are consistent with expectations from the standard model and with CP symmetry.

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Online detection of failures generated by storage simulator

2021 · ARTICLE · en

Modern large-scale data-farms consist of hundreds of thousands of storage devices that span distributed infrastructure. Devices used in modern data centers (such as controllers, links, SSD- and HDD-disks) can fail due to hardware as well as software problems. Such failures or anomalies can be detected by monitoring the activity of components using machine learning techniques. In order to use these techniques, researchers need plenty of historical data of devices in normal and failure mode for training algorithms. In this work, we challenge two problems: 1) lack of storage data in the methods above by creating a simulator and 2) applying existing online algorithms that can faster detect a failure occurred in one of the components. We created a Go-based (golang) package for simulating the behavior of modern storage infrastructure. The software is based on the discrete-event modeling paradigm and captures the structure and dynamics of high-level storage system building blocks. The package's exible structure allows us to create a model of a real-world storage system with a configurable number of components. The primary area of interest is exploring the storage machine's behavior under stress testing or exploitation in the medium-or long-term for observing failures of its components. To discover failures in the time series distribution generated by the simulator, we modified a change point detection algorithm that works in online mode. The goal of the change-point detection is to discover differences in time series distribution. This work describes an approach for failure detection in time series data based on direct density ratio estimation via binary classifiers.

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Search for CP violation in 𝐷+(𝑠)→ℎ+𝜋0 and 𝐷+(𝑠)→ℎ+𝜂 decays

2021 · ARTICLE · en

Searches for CP violation in the two-body decays 𝐷+(𝑠)→ℎ+𝜋0D(s)+→h+π0 and 𝐷+(𝑠)→ℎ+𝜂D(s)+→h+η (where h+ denotes a π+ or K+ meson) are performed using pp collision data collected by the LHCb experiment corresponding to either 9 fb−1 or 6 fb−1 of integrated luminosity. The π0 and η mesons are reconstructed using the e+e−γ final state, which can proceed as three-body decays π0 → e+e−γ and η → e+e−γ, or via the two-body decays π0 → γγ and η → γγ followed by a photon conversion. The measurements are made relative to the control modes 𝐷+(𝑠)→𝐾0Sℎ+D(s)+→KS0h+ to cancel the production and detection asymmetries. The CP asymmetries are measured to be 𝐶𝑃(𝐷+→𝜋+𝜋0)=(−1.3±0.9±0.6)%,𝐶𝑃(𝐷+→𝐾+𝜋0)=(−3.2±4.7±2.1)%,𝐶𝑃(𝐷+→𝜋+𝜂)=(−0.2±0.8±0.4)%,𝐶𝑃(𝐷+→𝐾+𝜂)=(−6±10±4)%,𝐶𝑃(𝐷+𝑠→𝐾+𝜋0)=(−0.8±3.9±1.2)%,𝐶𝑃(𝐷+𝑠→𝜋+𝜂)=(0.8±0.7±0.5)%,𝐶𝑃(𝐷+𝑠→𝐾+𝜂)=(0.9±3.7±1.1)%,ACP(D+→π+π0)=(−1.3±0.9±0.6)%,ACP(D+→K+π0)=(−3.2±4.7±2.1)%,ACP(D+→π+η)=(−0.2±0.8±0.4)%,ACP(D+→K+η)=(−6±10±4)%,ACP(Ds+→K+π0)=(−0.8±3.9±1.2)%,ACP(Ds+→π+η)=(0.8±0.7±0.5)%,ACP(Ds+→K+η)=(0.9±3.7±1.1)%, where the first uncertainties are statistical and the second systematic. These results are consistent with no CP violation and mostly constitute the most precise measurements of 𝐶𝑃ACP in these decay modes to date.

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Measurement of the prompt-production cross-section ratio σ(χc2)/σ(χc1) in pPb collisions at sNN=8.16 TeV

2021 · ARTICLE · en

This article reports the first measurement of prompt χc1 and χc2 charmonium production in nuclear collisions at Large Hadron Collider energies. The cross-section ratio σ(χc2)/σ(χc1) is measured in pPb collisions at sNN=8.16 TeV, collected with the LHCb experiment. The χc1,2 states are reconstructed via their decay to a J/ψ meson, subsequently decaying into a pair of oppositely charged muons, and a photon, which is reconstructed in the calorimeter or via its conversion in the detector material. The cross-section ratio is consistent with unity in the two considered rapidity regions. Comparison with a corresponding cross-section ratio previously measured by the LHCb Collaboration in pp collisions suggests that χc1 and χc2 states are similarly affected by nuclear effects occurring in pPb collisions.

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Measurement of CP Violation in the Decay B+→K+π0

2021 · ARTICLE · en

A measurement of CP violation in the decay B+→K+π0 is reported using data corresponding to an integrated luminosity of 5.4 fb−1 collected with the LHCb experiment at a center-of-mass energy of √s=13 TeV. The CP asymmetry is measured to be 0.025±0.015±0.006±0.003, where the uncertainties are statistical, systematic, and due to an external input. This is the most precise measurement of this quantity. It confirms and significantly enhances the observed anomalous difference between the direct CP asymmetries of the B0→K+π− and B+→K+π0 decays, known as the Kπ puzzle.

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Курсы (31)