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Multi-scale polarisation phenomena

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Light(Science & Applications) 2016年第1期5卷 810-818页

作者： vladimir Kalashnikov Sergey V Sergeyev Gunnar Jacobsen sergei Popov sergei K Turitsyn AIPT Aston UniversityBirminghamWest Midlands B47ETUK Acreo Electrum 236SE-16440KistaSweden Royal Institute of Technology(KTH) SE-1640StockholmSweden

Multi-scale methods that separate different time or spatial scales are among the most powerful techniques in physics,especially in applications that study nonlinear systems with *** the time scales(noise and perturbation)are of the same order,the scales separation becomes ***,the multi-scale approach has to be modified to characterise a variety of noise-induced ***,based on stochastic modelling and analytical study,we demonstrate in terms of the fluctuation-induced phenomena and Hurst R/S analysis metrics that the matching scales of random birefringence and pump–signal states of polarisation interaction in a fibre Raman amplifier results in a new random birefringence-mediated phenomenon,which is similar to stochastic *** observed phenomenon,apart from the fundamental interest,provides a base for advancing multi-scale methods with application to different coupled nonlinear systems ranging from lasers(multimode,mode-locked,random,etc.)to nanostructures(light-mediated conformation of molecules and chemical reactions,brownian motors,etc.).

关键词： fibre Raman amplifier multi-scale methods polarisation stochastic calculations

Finite-element analysis of scattering parameters of surface acoustic wave bandpass filter formed on barium titanate thin film

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International Journal of Smart and Nano Materials 2018年第2期9卷 88-98,I0002页

作者： Pavel e.Timoshenko Valery V.Kalinchuk vladimir b.Shirokov Department of Nanotechnology Southern Federal UniversityRostov-on-DonRussia Southern Scientific Center RAS Rostov-on-DonRussia

The frequency dependence of scattering parameters of interdigital surface acoustic wave transducers placed on ferroelectric barium titanate(baTiO_(3))epitaxial film in c-phase coated over magnesium oxide has been studied using the finite-element method(FeM)approach along with the perfectly matched layer(PML)*** interdigital transducer which has a comb-like structure with aluminum electrodes excites the mechanical *** distance between the fingers allows tuning the frequency properties of the wave *** magnesium oxide is taken as the *** two-dimensional model of two-port surface acoustic wave filter is created to calculate scattering parameters and to show how to design the fixture in COMSOL_(TM).Some practical computational challenges of finite element modeling of SAW devices in COMSOL_(TM)are *** effect of lattice misfit strain on acoustic properties of heterostructures of baTiO_(3)epitaxial film in c-phase at room temperature is discussed in present article for two lowfrequency surface acoustic resonances.

关键词： SAW filters ferroelectrics thin films finite element method(FeM) COMSOL

TeLS: A Novel Computational Framework for Identifying Motif Signatures of Transcribed enhancers

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Genomics, Proteomics & bioinformatics 2018年第5期16卷 332-341页

作者： Dimitrios Kleftogiannis Haitham Ashoor vladimir b.bajic Centre for evolution and Cancer Division of Molecular PathologyThe Institute of Cancer Research(ICR)London SM2 5NGUnited Kingdom The Jackson Laboratory for Genomic Medicine FarmingtonCT 06032USA Computational bioscience Research Center(CbRC) ComputerElectrical and Mathematical Sciences and Engineering

In mammalian cells, transcribed enhancers(Trens) play important roles in the initiation of gene expression and maintenance of gene expression levels in a spatiotemporal manner. One of the most challenging questions is how the genomic characteristics of enhancers relate to enhancer activities. To date, only a limited number of enhancer sequence characteristics have been investigated, leaving space for exploring the enhancers’ DNA code in a more systematic way. To address this problem, we developed a novel computational framework, Transcribed enhancer Landscape Search(TeLS), aimed at identifying predictive cell type/tissue-specific motif signatures of *** a case study, we used TeLS to compile a comprehensive catalog of motif signatures for all known Trens identified by the FANTOM5 consortium across 112 human primary cells and *** results confirm that combinations of different short motifs characterize in an optimized manner cell type/tissue-specific Trens. Our study is the first to report combinations of motifs that maximize classification performance of Trens exclusively transcribed in one cell type/tissue from Trens exclusively transcribed in different cell types/tissues. Moreover, we also report 31 motif signatures predictive of enhancers’ broad activity. TeLS codes and material are publicly available at http://***/TeLS.

关键词： Sequence analysis Machine learning Transcription regulation Transcribed enhancer Motif identification

NeW WeIGHTeD MULTILINeAR OPeRATORS AND COMMUTATORS OF HARDY-CeSàRO TYPe

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Acta Mathematica Scientia 2015年第6期35卷 1411-1425页

作者： Ha Duy HUNG Luong Dang ky High School for Gifted Students Hanoi National University of education Applied Analysis Research Group Faculty of Mathematics and StatisticsTon Duc Thang University

This paper deals with a general class of weighted multilinear Hardy-Cesaro op- erators that acts on the product of Lebesgue spaces and central Morrey spaces. Their sharp bounds are also obtained. In addition, we obtain sufficient and necessary conditions on weight functions so that the commutators of these weighted multilinear Hardy-Cesaro oper- ators （with symbols in central bMO spaces） are bounded on the product of central Morrey spaces. These results extends known results on multilinear Hardy operators.

关键词： Hardy-Ces^ro operators Hardy's inequality multilinear Hardy operator weig-hted Hardy-Littlewood averages

The Value and Significance of Metagenomics of Marine environments

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Genomics, Proteomics & bioinformatics 2015年第5期13卷 271-274页

作者： Fangqing Zhao vladimir b.bajic Computational Genomics Lab Beijing Institutes of Life ScienceChinese Academy of Sciences Computational bioscience Research Center (CbRC) ComputerElectrical and Mathematical Sciences and Engineering Division (CEMSE)King Abdullah University of Science and Technology (KAUST)

Microbes have played a fundamental role in the natural his- tory of our planet, and have done so for billions of years. They have adapted to earth＇s many environments from the mild to the very extreme. Studying their diversity and their way of life is critical for understanding their full impact on the global ecology. Although the field of metagenomics is still young, it has unravelled a wider microbial diversity that had otherwise been completely overlooked by the traditional methods of microbiology. There are three major metagenomic themes：（a） marker metagenomics that surveys microbial community structure by targeting the highly-conserved 16S rRNA gene, （b） functional metagenomics that takes the total environmental DNA, from which it infers the metabolic potential of the microbial community, and （c） identification of novel enzymes.

关键词： The Value and Significance of Metagenomics of Marine environments

Integer Codes Correcting Single errors and Random Asymmetric errors within a byte

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Journal of Systems Science & Complexity 2020年第6期33卷 2103-2113页

作者： RADONJIC Aleksandar VUJICIC vladimir Institute of Technical Sciences of the Serbian Academy of Sciences and Arts BelgradeSerbia

In optical networks without optical amplifiers(ONWOAs) photons may fade or fail to be detected, but new photons cannot be generated. Hence, under normal conditions, only 1 → 0 errors can occur. However, in some situations, the photodetector may generate a false 0 → 1 error. This mostly occurs in cases when the dark current is higher than specified. With this in mind, in this paper,the authors present a class of codes suitable for use in ONWOAs using self-synchronous *** presented codes can correct single errors and random asymmetric(1 → 0) errors within a b-bit byte. Unlike classical codes, these codes use integer and lookup table operations. As a result, their interleaved version, implemented on a dual-core 3.0 GHz processor, achieves the theoretical throughput above the operating rate of 10 G networks.

关键词： Asymmetric errors decoding throughput integer codes optical networks single errors

Carbon monoxide production using a steel mill gas in a combined chemical looping process

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Journal of energy Chemistry 2022年第5期31卷 811-825页

作者： Varun Singh Lukas C.buelens Hilde Poelman Mark Saeys Guy b.Marin vladimir V.Galvita Laboratory for Chemical Technology Technologiepark 125B-9052 GhentBelgium

Up to 9% of the global CO_(2) emissions come from the iron and steel industry. Here, a combined chemical looping process to produce CO, a building block for the chemical industry, from the CO_(2) -rich blast furnace gas of a steel mill is proposed. This cyclic process can make use of abundant Fe_(3)O_(4) and CaO as solid oxygen and CO_(2) carriers at atmospheric pressure. A proof of concept was obtained in a laboratory-scale fixed bed reactor with synthetic blast furnace gas and Fe_(3)O_(4) /CaO = 0.6 kg/kg. CO production from the proposed process was investigated at both isothermal conditions(1023 K) and upon imposing a temperature program from 1023 to 1148 K. The experimental results were compared using performance indicators such as CO yield, CO space time yield, carbon recovery of the process, fuel utilisation, and solids’ *** temperature-programmed CO production resulted in a CO yield of 0.056 ± 0.002 mol per mol of synthetic blast furnace gas at an average CO space time yield of 7.6 mmol kgFe^(-1) s^(-1) over 10 cycles, carbon recovery of 48% ± 1%, fuel utilisation of 23% ± 2%, and an average calcium oxide and iron oxide utilisation of 22% ± 1% and 11% ± 1%. These experimental performance indicators for the temperature-programmed CO production were consistently better than those of the isothermal implementation mode by 20% to 35%. Over 10 consecutive process cycles, no significant losses in CO yield were observed in either implementation mode. Process simulation was carried out for 1 million metric tonnes per year of equivalent CO_(2) emissions from the blast furnace gas of a steel mill to analyse the exergy losses in both modes of operation. Comparison of the exergy efficiency of the temperature-programmed process to the isothermal process showed that the former is more efficient because of the higher CO concentration achievable,despite 20% higher exergy losses caused by heat transfer required to change temperature.

关键词： Steel industry CO_(2)capture Calcium oxide CO_(2)sorbent Reverse water gas shift Circular economy Process intensification

Microbial processes and factors controlling their activities in alkaline lakes of the Mongolian plateau

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Chinese Journal of Oceanology and Limnology 2015年第6期33卷 1391-1401页

作者： Zorigto b.NAMSARAeV Svetlana V.ZAITSeVA vladimir M.GORLeNKO Ludmila P.KOZYReVA bair b.NAMSARAeV National Research Centre "Kurchatov Institute" Akademika Kurchatova pl.1Moscow 123182Russia Winogradsky Institute of Microbiology RAS Prosp.60-let Oktyabrya 7/2Moscow 117312Russia Laboratory of Microbiology Institute of General and Experimental BiologySiberian branch RASSakhyanovoi St .6UlanUdeBuryat Republic 670047Russia buryat State University Smolina21Ulan-UdeBuryat Republic 670000Russia

A striking feature of the Mongolian plateau is the wide range of air temperatures during a year, -30 to 30~C. High summer temperatures, atmospheric weathering and the arid climate lead to formation of numerous alkaline soda lakes that are covered by ice during 6-7 months per year. During the study period, the lakes had pH values between 8.1 to 10.4 and salinity between 1.8 and 360 g/L. According to chemical composition, the lakes belong to sodium carbonate, sodium chloride-carbonate and sodium sulfate-carbonate types. This paper presents the data on the water chemical composition, results of the determination of the rates of microbial processes in microbial mats and sediments in the lakes studied, and the results of a Principal Component Analysis of environmental variables and microbial activity data. Temperature was the most important factor that influenced both chemical composition and microbial activity, pH and salinity are also important factors for the microbial processes. Dark CO2 fixation is impacted mostly by salinity and the chemical composition of the lake water. Total photosynthesis and sulfate-reduction are impacted mostly by pH. Photosynthesis is the dominant process of primary production, but the highest rate （386 mg C/（L.d）） determined in the lakes studied were 2-3 times lower than in microbial mats of lakes located in tropical zones. This can be explained by the relatively short warm period that lasts only 3-4 months per year. The highest measured rate of dark CO2 assimilation （59.8 mg C/（L·d）） was much lower than photosynthesis. The highest rate of sulfate reduction was 60 mg S/（L·d）, while that of methanogenesis was 75.6 μL CH4/（L·d） in the alkaline lakes of Mongolian plateau. The rate of organic matter consumption during sulfate reduction was 3-4 orders of magnitude higher than that associated with methanogenesis.

关键词： alkaline lakes microbial mats Mongolian plateau biogeochemical cycles

Improved theory of generalized meteo-ballistic weighting factor functions and their use

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Defence Technology（防务技术） 2016年第3期12卷 242-254页

作者： vladimir CeCH Jiri JeVICky Department of Weapons and Ammunition University of Defence Oprox Inc. Department of Mathematics and Physics University of Defence

It follows from the analysis of artillery fire errors that approximately two-thirds of the inaccuracy of indirect artillery fire is caused by inaccuracies in the determination of the meteo parameters included in fire error budget *** calculated under non-standard conditions are considered to be *** tools utilized for the analysis of perturbed trajectories are weighting factor functions(WFFs)which are a special kind of sensitivity *** are used for calculation of meteo ballistic elements b(ballistic wind w b,densityρb,virtual temperatureτb,pressure p b)as *** have found that the existing theory of WFF calculation has several significant *** aim of the article is to present a new,improved theory of generalized WFFs that eliminates the deficiencies *** this theory will improve methods for designing firing tables,fire control systems algorithms,and meteo message generation algorithms.

关键词： exterior ballistic Non-standard projectile trajectory Perturbation Meteoconditions Sensitivity function (Generalized) weighting (factor) function(curve) (Generalized) effect function Norm effect