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Source localization based on field signatures:Laboratory ultrasonic validation

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Journal of Electronic Science and Technology 2024年第3期22卷 47-56页

作者： Mahmoud Eissa Dmitry sukhanov Department of Radiophysics Tomsk State UniversityTomsk634050Russia Higher Institute for Applied Sciences and Technology(HIAST) Damascus31983Syria

Location awareness in wireless networks is essential for emergency services,navigation,gaming,and many other *** article presents a method for source localization based on measuring the amplitude-phase distribution of the field at the base *** existing scatterers in the target area create unique scattered field interference at each source *** unique field interference at each source location results in a unique field signature at the base station which is used for source *** the proposed method,the target area is divided into a grid with a step of less than half the *** grid node is characterized by its field signature at the base *** signatures corresponding to all nodes are normalized and stored in the base station as fingerprints for source *** normalization of the field signatures avoids the need for time synchronization between the base station and the *** a source transmits signals,the generated field signature at the base station is normalized and then correlated with the stored *** maximum correlation value is given by the node to which the source is the *** simulations and results of experiments on ultrasonic waves in the air show that the ultrasonic source is correctly localized using broadband field signatures with one base station and without time *** proposed method is potentially applicable for indoor localization and navigation of mobile robots.

关键词： Base station Field signature Fingerprints Localization Ultrasonic frequencies

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Gushing metal chain

Frontiers of Mechanical Engineering 2016年第1期11卷 95-100页

作者： Alexander BELYAEV Alexander sukhanov Alexander TSVETKOV Institute of Applied Mathematics and Mechanics Saint-Petersburg Polytechnic University St. Petersburg 195251 Russia

This article addresses the problem in which a chain falls from a glass from some height. This phenomenon demonstrates a paradoxical rise of the chain over the glass. To explain this effect, an initial hypothesis and an appropriate theory are proposed for calculating the steady fall parameters of the chain. For this purpose, the modified Cayley ＇s problem of falling chain given its rise due to the centrifugal force of upward inertia is solved. Results show that the lift caused by an increase in linear density at the part of chain where it is being bent （the upper part） is due to the convergence of the chain balls to one another. The experiments confirm the obtained estimates of the lifting chain.

关键词： chain fountain Meshchersky equation,Cayley's problem

Monocotyledon-like Leaves from the Middle Jurassic of East Siberia(Russia)

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Acta Geologica Sinica(English Edition) 2022年第6期96卷 1884-1896页

作者： Andrey FROLOV ilya ENUSHCHENKO Institute of the Earth’s Crust Siberian Branch of the Russian Academy of SciencesIrkutsk 664033Russia Limnological Institute Siberian Branch of the Russian Academy of SciencesIrkutsk 664033Russia

Leaf fragments of Herbifolia antiqua *** et Enushchenko *** *** the Middle Jurassic(Aalenian)of the Irkutsk Coal Basin(Eastern Siberia,Russia)are *** following features are characteristic of *** *** ***.:the presence of leaf sheaths,linear smooth-edged leaves with parallel venation,anastomoses between the veins,anomocytic stomata,rhomb-shaped ordinary epidermal *** a combination of characters is widespread in modern monocotyledonous plants and is absent in fossil and modern cryptogam and *** to the lack of evidence of an enclosed ovule in *** *** ***.,we attribute it to a typological angiosperm,based on its unique leaf structure characteristic of *** leaf epidermal structure of Herbifolia *** most similar to those of modern Asparagales and Liliales.

关键词： monocotyledons leaf epidermis new taxa Jurassic angiosperm Irkutsk Coal Basin

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功能与美学贝尔格莱德IT公司办公室

室内设计与装修 2025年第1期 16-21页

作者：无 Svetlana Dudina Dilyara Mukhamedova Vasilina Pavlova Evegeniya Sviridova Elena Menshikova ilya Ivanov(摄影) 夏花(编译) Nefa Architects 不详

该项目坐落在贝尔格莱德,是为一家国际IT公司设计的办公空间。项目的设计主旨不仅要能重现当地城市的景观多样性,也要体现其文化和历史的特质。设计师从南斯拉夫时期粗犷主义与现代主义的经典建筑风格中汲取灵感,通过原始混凝土元素,展... 详细信息

该项目坐落在贝尔格莱德,是为一家国际IT公司设计的办公空间。项目的设计主旨不仅要能重现当地城市的景观多样性,也要体现其文化和历史的特质。设计师从南斯拉夫时期粗犷主义与现代主义的经典建筑风格中汲取灵感,通过原始混凝土元素,展现城市的力量与质感;与此同时,设计融入明亮的色彩点缀,其灵感源于贝尔格莱德丰富的街头艺术作品。这些鲜明的艺术符号不仅为空间注入活力,还增强了视觉冲击力,使办公环境与城市特色无缝衔接,赋予空间独特的文化价值。

关键词：办公空间建筑风格街头艺术艺术符号办公环境无缝衔接注入活力景观多样性

Degenerations of Jordan Algebras and“Marginal”Algebras

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Algebra Colloquium 2021年第2期28卷 281-294页

作者： ilya Gorshkov Ivan Kaygorodov Yury Popov Sobolev Institute of Mathematics NovosibirskRussia Universidade Federal do ABC CMCCSanto AndreBrazil Universidade Estadual de Campinas CampinasBrazil

We describe all degenerations of the variety ■3 of Jordan algebras of dimension three over *** particular,we describe all irreducible components in ■*** every n we define an n-dimensional rigid“marginal”Jordan algebra of level ***,we discuss marginal algebras in associative,alternative,left alternative,non-commutative Jordan,Leibniz and anticommutative cases.

关键词： Jordan algebra degeneration rigid algebra irreducible component marginal algebra

Experimental Study of Liquid Metal Flow for the Development of a Contact-Less Control Technique

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Fluid Dynamics & Materials Processing 2024年第7期20卷 1553-1564页

作者： Aleksandr Poluyanov ilya Kolesnichenko Laboratory of Technological Hydrodynamics Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science(ICMM UB RAS)Perm614018Russia

The article presents an experimental study on the flow of an eutectic gallium alloy in a cylindrical cell,which is placed in an alternating magnetic *** magnetic field is generated by a coil connected to an alternating current *** coil is located at a fixed height in such a way that its plane is perpendicular to the gravity vector,which in turn is parallel to the axis of the *** position of the cylinder can vary in height with respect to the *** forced flow of the considered electrically conductive liquid is generated due to the action of the localized electromagnetic *** is assumed that under the action of the alternating magnetic field,the liquid is heated uniformly,and the resulting heat is quickly absorbed by the forced flow,so that liquid free convection can be *** experiment is carried out using an ultrasonic Doppler *** transducer is installed in the axially located cylinder sluice and the other transducer is placed in the near-wall *** to the results,a velocity profile,corresponding to a two-tori flow pattern can be hardly obtained in the low frequency range of the power ***,this is possible in the high frequency *** average velocity profiles depend essentially on the location of the coil relative to the *** spectral analysis of velocity signals shows that the amplitude of the velocity pulsations is comparable to the average value of the flow *** experimental results and their verification through comparison with numerical calculations are intended to support the development of new methods for reducing the intensity of vortex flows during the electromagnetic separation of impurities through an electromagnetic induction mechanism(able to produce an electromotive force that displaces particles).

关键词： Ultrasonic doppler velocimeter electrically conductive medium azimuthal pinch experiment in liquid metal magnetohydrodynamics

Power absorption,plasma parameters and wave structure in inductive RF plasma source with low value external magnetic field

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Plasma Science and Technology 2020年第11期22卷 60-73页

作者： Elena KRALKINA Konstantin VAVILIN ilya ZADIRIEV Alexander NIKONOV Physical Electronics Department Faculty of PhysicsLomonosov Moscow State UniversityMoscow 119991Russia

The efficiency of radio-frequency(RF)power absorption,RF magnetic field structure and plasma parameters were measured in cylindrical inductive RF plasma sources 20 cm in diameter and 22,32,53 cm in length with a low value external magnetic *** experiments were carried out in argon at pressures of 13-140 m *** RF power supply changed from 200 W to 800 *** spiral antenna was used for sustaining the *** was shown that efficiency of RF power absorption depended nonlinearly on the external magnetic field *** maximal values of the RF power absorption efficiency,the axial distributions of longitudinal Bzand azimuthal Bφcomponents of RF magnetic field manifested the formation of the partially standing wave with a half wavelength close to 8 *** the same conditions,the axial dependence of the radial RF magnetic field component Brdiffered *** was concluded that the Bz and Bφamplitudes were largely determined by the RF field of Trivelpiece-Gould wave,while Br amplitude represented the radial RF field of the helicon wave.

关键词： radio-frequency plasma helicon Trivelpiece-Gould waves inductive discharge

Can we treat neurodegenerative diseases by preventing an age-related decline in microRNA expression?

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Neural Regeneration Research 2017年第10期12卷 1602-1604页

作者： ilya A.Vinnikov Andrii Domanskyi Laboratory of Molecular Neurobiology Sheng Yushou Center of Cell Biology and ImmunologyDepartment of Genetics and Developmental BiologySchool of Life Science and BiotechnologyShanghai Jiao Tong University Institute of Biotechnology Hi LIFEUniversity of Helsinki

MicroRNA pathway is down-regulated in aged dopaminergic neurons： Parkinson＇s disease （PD） is the most frequent motor neuro- degenerative disorder and is morphologically mainly associated with progressive dopaminer... 详细信息

关键词： RNA Can we treat neurodegenerative diseases by preventing an age-related decline in microRNA expression

Presenilins as endoplasmic reticulum calcium leak channels and Alzheimer's disease pathogenesis

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Science China(Life Sciences) 2011年第8期54卷 744-751页

作者： Charlene SUPNET ilya BEZPROZVANNY Department of Physiology University of Texas Southwestern Medical Center at Dallas

Alzheimer disease(AD) is the most common neurodegenerative disorder worldwide and is at present,*** accumulation of toxic amyloid-beta(Aβ) peptide aggregates in AD brain is thought to trigger the extensive synaptic loss and neurodegeneration linked to cognitive decline,an idea that underlies the'amyloid hypothesis'of AD etiology in both the familal(FAD) and sporadic forms of the *** mutations causing FAD also result in the dysregulation of neuronal calcium(Ca2+) handling and may contribute to AD pathogenesis,an idea termed the'calcium hypothesis'of *** in presenilin proteins account for majority of FAD *** function as catalytic subunit ofγ-secretase involved in generation of Aβ peptide Recently,we discovered that presenilns function as low-conductance,passive ER Ca2+ leak channels,independent of γ-secretase *** further discovered that many FAD mutations in presenilins result in loss of ER Ca2+ leak function activity and Ca2+ overload in the *** results provided potential explanation for abnormal Ca2+ signaling observed in FAD cells with mutations in *** latest work on studies of ER Ca2+ leak channel function of presenilins and implications of these findings for understanding AD pathogenesis are discussed in this article.

关键词： calcium signaling neurodegeneration presenilins Alzheimer's disease gamma-secretase amyloid