Bulletin of Irkutsk State University-Series Mathematics最新文献_第8页

Krotov Type Optimization of Coherent and Incoherent Controls for Open Two-Qubit Systems 开放双量子位系统相干和非相干控制的Krotov型优化

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.26516/1997-7670.2023.45.3

O. V. Morzhin, A. N. Pechen

{"title":"Krotov Type Optimization of Coherent and Incoherent Controls for Open Two-Qubit Systems","authors":"O. V. Morzhin, A. N. Pechen","doi":"10.26516/1997-7670.2023.45.3","DOIUrl":"https://doi.org/10.26516/1997-7670.2023.45.3","url":null,"abstract":"This work considers two-qubit open quantum systems driven by coherent and incoherent controls. Incoherent control induces time-dependent decoherence rates via time-dependent spectral density of the environment which is used as a resource for controlling the system. The system evolves according to the Gorini–Kossakowski– Sudarshan–Lindblad master equation with time-dependent coefficients. For two types of interaction with coherent control, three types of objectives are considered: 1) maximizing the Hilbert–Schmidt overlap between the final and target density matrices; 2) minimizing the Hilbert–Schmidt distance between these matrices; 3) steering the overlap to a given value. For the first problem, we develop the Krotov type methods directly in terms of density matrices with or without regularization for piecewise continuous controls with constaints and find the cases where the methods produce (either exactly or with some precision) zero controls which satisfy the Pontryagin maximum principle and produce the overlap’s values close to their upper bounds. For the problems 2) and 3), we find cases when the dual annealing method steers the objectives close to zero and produces a non-zero control.","PeriodicalId":42592,"journal":{"name":"Bulletin of Irkutsk State University-Series Mathematics","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135784555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Petrogeochemisy of Granites of the Badiayu Massif (the Subpolar Urals) 亚极地乌拉尔山脉巴迪峪地块花岗岩岩石地球化学特征

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.26516/2073-3402.2023.45.39

Yu. V. Denisova

{"title":"Petrogeochemisy of Granites of the Badiayu Massif (the Subpolar Urals)","authors":"Yu. V. Denisova","doi":"10.26516/2073-3402.2023.45.39","DOIUrl":"https://doi.org/10.26516/2073-3402.2023.45.39","url":null,"abstract":"Magmatic formations of various ages are developed within the northern part of the Circumpolar Urals, the oldest peripheral part of the Ural belt. Including the Late-Riphean-Vendian granitoids of the salner-mankhambov intrusive complex, which includes the Badiayu granite massif. The conducted research allowed us to identify a number of petrographic and petrogeochemical features of the granites under consideration. The analysis of rock-forming minerals, which are a typical set for granites, with the help of a polarization microscope allowed us to determine the characteristic structures of the rock, to identify the presence of plagioclases and biotites of two generations, to detect partial substitution of quartz with a granular variety. The data of the silicate method allowed us to establish that the studied rock is characterized by an increased content of silica, the main alkali metals, and a very high alumina content. ICP-MS method data and their normalization with respect to S. S. San chondrite and the hypothetical plagiogranite COX showed that the rocks were formed from crustal-type melts saturated with rare-earth, as well as individual lithophilic elements (rubidium, barium). According to the diagnostic diagrams of J. A. Pierce, D. Papu, N. B. Harris, the formation of the studied massif occurred in the conditions of an intraplate geodynamic situation.","PeriodicalId":42592,"journal":{"name":"Bulletin of Irkutsk State University-Series Mathematics","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135957683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SOME FEATURES OF A STUDENT-MUSICIAN’S DEVELOPMENTOF THE COGNITIVE AND ACTIVITY COMPONENT OF THE CREATIVE STYLE OF THINKING IN THE EDUCATIONAL PROCESS OF THE HIGHER EDUCATIONAL INSTITUTION 大学生音乐家在高等学校教育过程中创造性思维方式的认知和活动成分发展的一些特征

IF 0.7

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.47438/2309-7078_2023_1_94

Anastasia V. Tsygankova, Anatoly S. Petelin

引用次数: 0

STUDENTS' IDEAS ON THE ORGANIZATION OF ONLINE FOREIGN LANGUAGE TEACHING AT A TECHNICAL UNIVERSITY (BY THE EXAMPLEOF VORONEZH STATE UNIVERSITY OF ENGINEERING TECHNOLOGIES) 工科大学学生对网络外语教学组织的看法(以沃罗涅日国立工程技术大学为例)

IF 0.7

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.47438/2309-7078_2023_1_82

Svetlana V. Polozova, Olga V. Myakushkina, Alexandra A. Dryuchenko

引用次数: 0

Purification of natural waters from borate ions using ion exchange 利用离子交换技术净化天然水体中的硼酸盐离子

IF 0.7

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.52409/20731523_2023_1_52

A. Busarev, I. Sheshegova

引用次数: 0

Reconstruction of the volume-planning parameters of schools using the principles and techniques of biophilic architecture 利用亲生物建筑的原则和技术重建学校的体量规划参数

IF 0.7

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.52409/20731523_2023_1_129

V. Kupriyanov, I. Mirsayapov, A. G. Khabibulina, A. M. Khabibulina

引用次数: 0

Regional Psychology and Its History: A Review of Historical-Psychological and Methodological Approaches 区域心理学及其历史:历史心理学和方法论研究综述

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.26516/2304-1226.2023.45.3

O. A. Artemeva, A. A. Shikun

引用次数: 0

Neighbourhood Effect as a Significant Factor at the Latvian Parliamentary Elections in 2010-2022 邻里效应:2010-2022年拉脱维亚议会选举中的重要因素

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.26516/2073-3380.2023.45.90

L. S. Zhirnova

{"title":"Neighbourhood Effect as a Significant Factor at the Latvian Parliamentary Elections in 2010-2022","authors":"L. S. Zhirnova","doi":"10.26516/2073-3380.2023.45.90","DOIUrl":"https://doi.org/10.26516/2073-3380.2023.45.90","url":null,"abstract":"The article tackles the issue of the neighbourhood effect in the Latvian Saeima elections in 2010–2022. Although the ethnolinguistic cleavage remains the main voting factor, currently the Latvian electoral system is transforming due to the fragmentation of the Russian-speaking electoral landscape. As a result, it is increasingly important to take into account other voting factors including the neighbourhood effect. To prove its importance in the electoral system the regression analysis is used: the classical model is compared with the spatial lag model when the average support of the party in neighbouring regions is added to the list of independent variables. In all the cases with an acceptable probability value accounting for the spatial lag has increased the explanatory power and the quality of the regression models. The strongest neighbourhood effect has been identified for the Progressive party in 2022, the Development/For! In 2018 and the Greens and Farmers Union in 2011. The neighbourhood effect has also influenced the voting for the so-called Russian parties including the Harmony, the Larvian Russian Union and the Stability, however it has not explained more than a few percent of the dispersion of their support, with the etholinguistic structure of electorate being of paramount importance in these cases.","PeriodicalId":42592,"journal":{"name":"Bulletin of Irkutsk State University-Series Mathematics","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135400729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Military Conflicts of the 20th and 21st Centuries in the Interpretation of Jehovah's Witnesses 从耶和华见证人的解释看20世纪和21世纪的军事冲突

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.26516/2073-3380.2023.45.165

G. A. Golovnev

引用次数: 0

Resolution of Linear-quadratic Problems in a Discrete-continuous Format with External Actions 具有外部作用的离散-连续形式线性二次问题的求解

Bulletin of Irkutsk State University-Series Mathematics Pub Date : 2023-01-01 DOI: 10.26516/1997-7670.2023.45.24

V. A. Srochko, V. G. Antonik

引用次数: 0