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基于石墨烯的光学控制窄带太赫兹开关（英文）

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中国光学 2018年第2期11卷 166-173页

作者： GREBEnCHUKOV alexander n ZAITSEV Anton D KHODZITSKY Mikhail K ITMO University Saint-Petersburg 197101Russia

本文提出了一种光控太赫兹开关,该开关采用覆盖单层石墨烯的十字金属谐振器超表面。利用石墨烯表面电导率模型和有限元法计算了这种复合结构的光谱特性。模拟结果表明,在0.2 W/mm^2的光泵浦后,传输谱(调制深度为36.8%,Q-因子为250)出现... 详细信息

本文提出了一种光控太赫兹开关,该开关采用覆盖单层石墨烯的十字金属谐振器超表面。利用石墨烯表面电导率模型和有限元法计算了这种复合结构的光谱特性。模拟结果表明,在0.2 W/mm^2的光泵浦后,传输谱(调制深度为36.8%,Q-因子为250)出现了窄带共振衰减现象。另外,这种衰减的调制深度可以通过改变泵浦强度微调节。因此,光学可调谐太赫兹开关的设计将有助于太赫兹通信应用的功能组件开发。

关键词：太赫兹石墨烯光开关器件

Linking tree growth rate, damage repair, and susceptibility to a genus-specific pest infestation

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Journal of Forestry Research 2019年第5期30卷 1935-1941页

作者： Kayla n.Boyes Kathryn G.Hietala-Henschell alexander P.Barton Andrew J.Storer Jordan M.Marshall Department of Biology Purdue University Fort WayneFort WayneIN 46805USA School of Forest Resources and Environmental Science Michigan Technological UniversityHoughtonMI 49931USA

Pest preference and subsequent susceptibility of a host individual is likely related to previous growth patterns in that *** ash borer(Agrilus planipennis Fairmaire)is a pestiferous beetle introduced to north America from *** all species of ash are susceptible to attack,some individual trees appear to survive *** selected ash trees in southeastern Michigan,collected cores and categorized trees as high tolerance to emerald ash borer attack(high overall health,low crown dieback),low tolerance(low overall health,high crown dieback)and intermediate tolerance(in-between the other categories).We artificially wounded trees and measured wound closure after 3 *** width indices were not correlated between high and low tolerance *** slopes comparing growth and years were significantly different between the three tolerance categories,with high tolerance trees having the steepest *** closure was greatest in high tolerance *** tolerance trees demonstrating more rapid(steeper regression slope),consistent(lower variance),and effective(greater wound closure)*** vigorously growing trees likely had more capacity to repair damage caused by emerald ash borer,leading to healthier trees in our *** previous host growth patterns to health may have implications related to identifying individual trees potentially tolerant to attack.

关键词： Agrilus Ash Dendrochronology Emerald ash borer Fraxinus Invasive species

Quantum Yang-Baxter equation and constant R-matrix over Grassmann algebra

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第10期6卷 1065-1079页

作者： DUPLIJ Steven KOTULSKA Olga SADOVnIKOV alexander Department of Physics and Technology V.N. Karazin Kharkov National University Svoboda Sq. 4 Kharkov 61077 UkraineDepartment of Physics and Technology V.N. Karazin Kharkov National University Svoboda Sq. 4 Kharkov 61077 UkraineDepartment of Physics and Technology V.N. Karazin Kharkov National University Svoboda Sq. 4 Kharkov 61077 Ukraine

Constant solutions to Yang-Baxter equation are investigated over Grassmann algebra for the case of 6-vertex R-matrix. The general classification of all possible solutions over Grassmann algebra and particular cases with 2,3,4 generators are studied. As distinct from the standard case, when R-matrix over number field can have a maximum 5 nonvanishing elements, we obtain over Grassmann algebra a set of new full 6-vertex solutions. The solutions leading to regular R-matrices which appear in weak Hopf algebras are considered.

关键词： Constant solution Grassmann algebra Regularity R-matrix

大功率离子推力器和流动控制单元验证现状及其2000小时寿命试验（英文）

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推进技术 2020年第1期41卷 109-120页

作者： alexander S Lovtsov Michael Y Selivanov Andrey n Kostin Andrey A Shagayda Keldysh Research Center

为了发展基于电推进的大功率空间运输系统,需要开发和验证功率达数十千瓦的电推进系统,深空任务电推进系统优化的比冲要求高达105s。凯尔迪什研究中心(KeRC)正在开发这样的电推进部件。本文概述了35kW离子推力器IT-500及其流动单元FCU-... 详细信息

为了发展基于电推进的大功率空间运输系统,需要开发和验证功率达数十千瓦的电推进系统,深空任务电推进系统优化的比冲要求高达105s。凯尔迪什研究中心(KeRC)正在开发这样的电推进部件。本文概述了35kW离子推力器IT-500及其流动单元FCU-500的验证现状。作为其验证的一部分,完成了IT-500和FCU-500的2000h寿命试验。其中,离子推力器大部分验证条件是:输入功率17.8kW,使用了40kg氙,2018h寿命试验。本文介绍了磁场和离子光学以及石墨格栅开发现状。

关键词：离子推力器大功率放电室离子光学

novel indications for autologous fat grafting in reconstruction:scleroderma

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Plastic and Aesthetic Research 2023年第1期10卷 680-688页

作者： Abed Rahman Kawakibi alexander n.Khouri Paul S.Cederna Amy L.Strong Section of Plastic Surgery Department of SurgeryUniversity of MichiganAnn ArborMI 49109USA

Scleroderma is a chronic connective tissue disease characterized by inflammation,vascular injury,and progressive skin fibrosis,resulting in significant aesthetic and functional impairments for *** therapies are limited and insufficiently treat the cutaneous manifestations of *** fat transfer(AFT)is a surgical technique that has been utilized for many decades for facial *** adipose stem cells(ASCs)present in fat grafts have also shown significant promise for their anti-inflammatory and regenerative ***,AFT has been repurposed to treat the skin manifestations of systemic sclerosis and localized *** suggest that AFT in scleroderma patients improves mouth and hand functions,Raynaud’s symptoms,and digital *** is a safe procedure with rare postoperative complications,making it a promising intervention for the treatment of *** studies are required to better characterize the influence of fat grafts on the recipient site and to establish standards for fat transfer in fibrotic skin diseases.

关键词： Scleroderma systemic sclerosis localized scleroderma AFT

Pre-trained Mol2Vec Embeddings as a Tool for Predicting Polymer Properties

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Chinese Journal of Polymer Science 2024年第12期42卷 2059-2068,I0014页

作者： Ivan Zlobin nikita Toroptsev Gleb Averochkin alexander Pavlov Center nTI“Digital Materials Science:new Materials and Substances” Bauman Moscow State Technical University2S1 Baumanskaya St.5/1105005MoscowRussia A.n.nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences Vavilova St.28Bld.1119334MoscowRussia

Machine learning-assisted prediction of polymer properties prior to synthesis has the potential to significantly accelerate the discovery and development of new polymer *** date,several approaches have been implemented to represent the chemical structure in machine learning models,among which Mol2Vec embeddings have attracted considerable attention in the cheminformatics community since their introduction in ***,for small datasets,the use of chemical structure representations typically increases the dimensionality of the input dataset,resulting in a decrease in model ***,the limited diversity of polymer chemical structures hinders the training of reliable embeddings,necessitating complex task-specific architecture *** address these challenges,we examined the efficacy of Mol2Vec pre-trained embeddings in deriving vectorized representations of *** study assesses the impact of incorporating Mol2Vec compound vectors into the input features on the efficacy of a model reliant on the physical properties of 214 *** results will hopefully highlight the potential for improving prediction accuracy in polymer studies by incorporating pre-trained embeddings or promote their utilization when dealing with modestly sized polymer databases.

关键词： Properties prediction High dimensional embeddings Machine learning Mol2Vec

Construction of Periodic Solutions of One Class nonautonomous Systems of Differential Equations

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Journal of Applied Mathematics and Physics 2013年第3期1卷 1-4页

作者： alexander n. Pchelintsev Tambov State Technical University Tambov Russia

In this article we proposed a method for constructing approximations to periodic solutions of one class nonautonomous system of ordinary differential equations. It is based on successive approximation scheme using parallel symbolic calculations to obtain solutions in analytical form. We showed the convergence of the scheme of successive approximations on the period, and also considered an example of a second order system where the described scheme of calculations can be applied.

关键词： Periodic Solution System of Ordinary Differential Equations Scheme of Successive Approximations Symbolic Calculations

Molecular docking of cyanine and squarylium dyes with SARS-CoV-2 proteases nSP3, nSP5 and nSP12

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Quantitative Biology 2021年第4期9卷 440-450页

作者： Pavel Pronkin alexander Tatikolov n.m.emanuel institute of biochemical physics russian academy of sciencesmoscow 119991russia

Background:The outbreak and continued spread of coronavirus infection(COVID-19)sets the goal of finding new tools and methods to develop analytical procedures and tests to detect,study infection and prevent ***:The noncovalent binding of cyanine and squarylium dyes of different classes(60 compounds in total)with the proteases nSP3,nSP5,and nSP12 of SARS-CoV-2 was studied by the method of molecular ***:The interaction energies and spatial configurations of dye molecules in complexes with nSP3,nSP5,and nSP12 have been ***:A number of anionic dyes showing lower values of the total energy Etot could be recommended for practical research in the development of agents for the detection and inactivation of the coronavirus.

关键词： SARS-CoV-2 proteases polymethine dyes squarylium dyes noncovalent interaction molecular docking

Characterization of cerebral blood flow dynamics with multiscale entropy

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Journal of Innovative Optical Health Sciences 2017年第5期10卷 85-93页

作者： Alexey n.Pavlov Arkady S.Abdurashitov Olga n.Pavlova Maria V.Ulanova Anastasia A.Bodrova natalia A.Shushunova alexander P.Khorovodov Oxana V.Semyachkina-Glushkovskaya Yuri Gagarin State Technical University of Saratov 77 Politechnicheskaya Street Saratov 410054Russia Saratov national Research State University 83 Astrakhanskaya Street Saratov 410012Russia

Based on the laser speckle contrast imaging(LSCI)and the multiscale entropy(MSE),we study in this work the blood flow dynamics at the levels of cerebral veins and the surrounding network of microcerebral *** discuss how the phenylephrine-related acute peripheral bypertension is refected in the cerebral circulation and show that the observed changes are scale dependent,and they are signifcantly more pronounced in microcerebral vessels,while the macrocerebral dynamics does not demonstrate authentic inter-group *** also consider the permeability of blood-brain barrier(BBB)and study its opening caused by sound *** show that alterations associated with the BBB opening can be revealed by the analysis of blood flow at the level of macrocerebral vessels.

关键词： Cerebral blood flow laser speckle contrast imaging arterial pressure complexity