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Optimizing signal collection efficiency of the VIPA-based Brillouin spectrometer

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Journal of Innovative Optical Health Sciences 2015年第4期8卷 39-45页

作者： Zhaokai Meng vladislav V.Yakovlev Texas A&M University College StationTX 77843USA

Brillouin spectroscopy is an emerging tool for microscopic optical imaging as it allows for non-invasive and direct assessment of the viscoelastic properties of *** advances of background-free confocal Brillouin spectrometer allows investigators to acquire the Brillouin spectra for turbid samples as well as transparent ***,due to strong signal loss induced by the imperfect optical setup,the Brillouin photons are usually immersed in background *** this report,we proposed and experimentally demonstrated multiple approaches to enhance the signal collction eficiency.A signal enhancement by>4 times can be observed,enabling ob-servation of ultra-weak signals.

关键词： Brillouin spectroscopy confocal microscope microscopic mechanical property specific imaging

Accelerating matrix/boundary precipitations to explore high-strength and high-ductile Co_(34)Cr_(32)Ni_(27)Al_(3.5)Ti_(3.5) multicomponent alloys through hot extrusion and annealing

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Journal of Materials Science & Technology 2023年第12期143卷 62-83页

作者： Xiaoming Liu Zongde Kou Ruitao Qu Weidong Song Yijia Gu Changshan Zhou Qingwei Gao Jiyao Zhang Chongde Cao Kaikai Song vladislav Zadorozhnyy Zequn Zhang Jürgen Eckert Shenzhen Research Institute of Shandong University Shenzhen 518057China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China School of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209China School of Material Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China Department of Materials Science and Engineering Missouri University of Science and TechnologyRollaMO 65409USA Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China National University of Science and Technology«MISIS» Moscow 119049Russia Erich Schmid Institute of Materials Science Austrian Academy of SciencesLeoben A-8700Austria Department of Materials Science Montanuniversität LeobenLeoben A-8700Austria

Annealing-regulated precipitation strengthening combined with cold-working is one of the most efficient strategies for resolving the conflict between strength and ductility in metals and ***,precipitation control and grain refinement are mutually contradictory due to the excellent phase stability of multicomponent *** work utilizes the high-temperature extrusion and annealing to optimize the microstructures and mechanical properties of the Co_(34)Cr_(32)Ni_(27)Al_(3.5)Ti_(3.5) multicomponent *** extrusion effectively reduces grain sizes and simultaneously accelerates the precipitation of coherent L12 nanoparticles inside the face-centered cubic(FCC)matrix and grain boundary precipitations(i.e.,submicron Cr-rich particles and L12-Ni 3(Ti,Al)precipitates),resulting in strongly reciprocal interaction between dislocation slip and hierarchical-scale *** annealing regulates grain sizes,dislocations,twins,and precipitates,further allowing to tailor mechanical *** high yield strength is attributed to the coupled precipitation strengthening effects from nanoscale coherent L12 particles inside grains and submicron grain boundary precipitates under the support of pre-existing *** excellent ductility results from the synergistic activation of dislocations,stacking faults,and twins during plastic *** present study provides a promising approach for regulat-ing microstructures,especially defects,and enhancing the mechanical properties of multicomponent alloys.

关键词： Multicomponent alloys Hot extrusion Microstructure Mechanical properties Precipitation strengthening

Large-diameter indium antimonide microwire based broadband and robust optical switch

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Science China(Physics,Mechanics & Astronomy) 2023年第2期66卷 68-78页

作者： Fei Lou Xiangpeng Cui Xinyue Sheng Chunyan Jia Shuaiyi Zhang Xia Wang vladislav Khayrudinov Baitao Zhang Shande Liu Wing Yim Tam Harri Lipsanen He Yang Jingliang He Shandong Advanced Optoelectronic Materials and Technologies Engineering Laboratory of Qingdao School of Mathematics and PhysicsQingdaoUniversityof Scienceand TechnologyQingdao266061China School of Instrumenation and Optoeletronic Engineering Beihang University Beijing 100191China Department of Electronics and Nanoengineering Aalto Universiy EspooFl-0o076Finland State Key Laboratory of Crystal Materials Institute of Novel Semiconductors Shandong University.Jinan 250100China College of Electronic and Information Engineering Shandong University of Science and TechnologyQingdao 266590China Depariment of Physics and Wiliam Mong Institute of Nano Science and Technology Hong Kong University of Science and Technology.HongKongChina

Various nanophotonic devices based on semiconductor wires with a diameter of several ten nanometers have been ***,studying the optoelectronics properties and performance of such devices based on large-diameter wires is interesting and ***,we successfully grew the micronsized indium antimonide(InSb) wires,and examined their nonlinear optical properties by Z-scan and I-scan(power-dependent) methods within the wavelength range of 0.8-2.8 μ***,we demonstrated InSb micro wires(MWs) working as an effective and robust optical switch within 1-2.8 μm *** findings can open possibilities for research on more large-diameter MWs made from other semiconductor materials for photonic and electronic devices.

关键词： optical antimonide InSb

Cementation Characteristics and Their Effect on Quality of the Upper Triassic, the Lower Cretaceous, and the Upper Cretaceous Sandstone Reservoirs, Euphrates Graben, Syria

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Journal of Earth Science 2021年第6期32卷 1545-1562页

作者： Ibrahem Yousef Vladimir Morozov vladislav Sudakov Ilyas Idrisov Institute of Geology and Petroleum Technologies Kazan Federal UniversityKazanRussia

This article presents the results of cementation characteristics and their effect on sandstone reservoir quality of the Upper Triassic Mulussa F, the Lower Cretaceous Lower Rutbah, and the Upper Cretaceous Post Judea Sandstone formations in selected fields in the Euphrates Graben area, Syria. This study emphasises the role of cementation in the evaluation of the diagenetic history of the sediments, developing effective porosity, as well as evaluation of reservoirs stimulation procedures and potential for formation damage of the sandstone reservoirs. Quartz cement is present as well developed tabular or pyramidal syntaxial overgrowths. Kaolinite cement is present as vermicular aggregates which are most abundant within sandstones of the Mulussa F Formation. Carbonate cements include siderite and dolomite. Four lithofacies were identified within the studied formations;lithofacies-1 and 2 correspond to fluvial depositional environments, lithofacies-3 and 4 correspond to fluvial to estuarine channel environments. The Post Judea Sandstone and the Lower Rutbah reservoir units are typically lithofacies-3 sequences in which quartz overgrowths are the dominant cement. Because the total cement is more extensive in the Post Judea Sandstone Formation than in the Lower Rutbah Formation, resulting in high porosity(up to 26%) and permeability(6 000 mD), the reservoir quality is predicted to be best in the Post Judea Sandstone Formation. The reservoir units in the Mulussa F Formation contain the highest cement volumes comprised of early siderite and kaolinite, which, with the development of compaction-resisting quartz overgrowths and resultant compactional pore volume loss, has resulted in typically lower porosity being preserved than in the Lower Rutbah and Post Judea Sandstone formations.

关键词： cementation diagenesis reservoirs quality Euphrates Graben Syria

A pilot study of the dynamics of tissue oxygenation in vivo using time-resolved phosphorescence imaging

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Journal of Innovative Optical Health Sciences 2021年第5期4卷 15-24页

作者： Natalia Kazachkina Julia Lymar vladislav Shcheslavskiy Alexander Savitsky A.N.Bach Institute of Biochemistry Research Center of Biotechnology of the Russian Academy of Sciences Moscow 119071Russian Federation Institute of Experimental Oncology and Biomedical Technologies Privolzhsky Research Medical University Sq Minin and Pozharsky10/1603005 Nizhny Novgorod Russian Federation Becker and Hickl GmbH Nunsdorfer Ring 7-912277 BerlinGermany

Oxygenation of tissues plays an important role in the development and progression of tumor to treatment *** of metalloporphyrines phosphorescence quenching by oxygen is one of the ways to measure dynamics of the oxygen concentration in the tissues by phosphorescence lifetime imaging of meso-tetra(sulfophenyl)tetrabenzoporphyrin Pd(Ⅱ)(TBP)using the time-correlated single photon counting(TCSPC)*** has been shown that phosphorescence lifetime of the sensor in S37 tumor in vivo varied in the range of 130 to 290μs after both topical and intravenous administration of *** indicates that oxygen level in tumors was lower compared to normal tissues where TBP phosphorescence has not been *** lifetimes of TBP increased in the solid tumor and in the muscle after photodynamic therapy of solid tumor that demonstrates oxygen consumption during treatment and possibly stopping the blood flow and hence the oxygen supply to the tissues.

关键词： Phosphorescence oxygen sensor metalloporphyrines TCSPC

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B公司电动工具市场营销优化策略研究

B公司电动工具市场营销优化策略研究

作者： SHEN vladislav 华东师范大学

学位级别：硕士

电动工具已经成为工业制造和民众日常生活使用中必备的五金工具之一,其使用场景不仅包括工业用途,近年来在个人日常使用的市场也实现了快速增长。在中国庞大的市场中,电动工具企业面临着激烈的竞争,必须寻求保持不败的策略,并迅速占领... 详细信息

电动工具已经成为工业制造和民众日常生活使用中必备的五金工具之一,其使用场景不仅包括工业用途,近年来在个人日常使用的市场也实现了快速增长。在中国庞大的市场中,电动工具企业面临着激烈的竞争,必须寻求保持不败的策略,并迅速占领市场领先地位。在这样的品牌竞争中,企业需要注重品牌形象塑造和产品创新,提升产品品质和技术含量,并通过市场营销和渠道拓展来吸引更多消费者。同时,企业还需关注客户体验,提供优质售后服务,树立口碑和信誉,赢得消费者的信赖和忠诚度。只有综合运用这些策略,电动工具企业才能在激烈的市场竞争中立于不败之地,实现可持续发展。国内外电动工具生产制造企业为了抢占市场,获得竞争优势,不断加大资金的投入、突出品牌和营销优势,同时,更多的竞争者进入市场,使得市场竞争日益激烈。虽然B公司作为一家国际知名的电动工具制造企业在市场上有着一定的品牌知名度和市场占有率,但是其整体营销仍需要优化,以便跟上行业发展趋势并实现更大的发展突破。本文将首先介绍B公司的发展历程以及市场营销现状,然后使用PEST分析工具对B公司所处的宏观环境进行深入分析,确定国内电动工具市场的发展前景和空间。接着,本文进行了中国电动工具市场的问卷调研,发现了B公司市场营销存在的问题:定价不合理、产品缺乏多元化、渠道结构单一、促销模式过于传统。为了更好地解决这些问题,本文进行了详细的归因分析。最后,本文根据4P营销组合理论提出了一系列优化策略,旨在加速B公司的发展。通过本文的研究结果,B公司可以获得新的营销思路和实用建议,同时,其他电动工具行业的企业也可以从中获得参考和借鉴价值。

关键词：电动工具营销策略优化

Crystals based on solid solution of Ag_(1-x) Tl_xBr_(1-x) I_x for the manufacturing of IR fibers

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Chinese Optics Letters 2015年第9期13卷 6-8页

作者： Alexandr Korsakov Liya Zhukova Dmitrii Salimgareev vladislav Zhukov Ural Federal University named after the first President of Russia

For the development of fiber optics for the range from 0.2 to 50.0 μm, one needs light-stable, nonhygroscopic, ductile crystals that would be transparent within this spectral range and have a lack of cleavage, and from which the flexible infrared （IR） fibers are extruded. The crystals based on solid solutions of silver and monadic thallium haides meet the conditions listed above. Consequently, by differential thermal and x ray analyses, we study the TIBr-TII phase diagram using the crystals with optimal compositions, which we grow ourselves. We also manu- facture light-stable nanocrystalline IR fibers that are transparent at longer wavelengths compared with AgC1-AgBr fibers.

关键词： I_x for the manufacturing of IR fibers Crystals based on solid solution of Ag IR

Suppressing small-scale self-focusing of high-power femtosecond pulses

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High Power Laser Science and Engineering 2023年第2期11卷 103-109页

作者： Mikhail Martyanov vladislav Ginzburg Alexey Balakin Sergey Skobelev Dmitry Silin Anton Kochetkov Ivan Yakovlev Alexey Kuzmin Sergey Mironov Ilya Shaikin Sergey Stukachev Andrey Shaykin Efim Khazanov Alexander Litvak Institute of Applied Physics of the Russian Academy of Sciences Nizhny NovgorodRussia

It was shown experimentally that for a 65-fs 17-J pulse,the effect of filamentation instability,also known as small-scale self-focusing,is much weaker than that predicted by stationary and nonstationary theoretical models for high B-integral *** this discrepancy has been left unexplained at the moment,in practice no signs of filamentation may allow a breakthrough in nonlinear pulse post-compression at high laser energy.

关键词： B-integral cubic Kerr nonlinearity filamentation instability high-power femtosecond laser nonlinear post-compression

Adaptive Algorithm for Accelerating Direct Isosurface Rendering on GPU

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Journal of Electronic Science and Technology 2018年第3期16卷 222-231页

作者： Sergey Belyaev Pavel Smirnov vladislav Shubnikov Natalia Smirnova the Department of Applied Mathematics Institute of Applied Mathematics and MechanicsPeter the Great St.Petersburg Polytechnic UniversitySt.Petersburg 195251 EPAM Systems Inc. Newtown PA 18940

Direct isosurface volume rendering is the most prominent modern method for medical data *** is based on finding intersection points between the rays corresponding to pixels on the screen and isosurface. This article describes a two-pass algorithm for accelerating the method on the graphic processing unit(GPU). On the first pass, the intersections with the isosurface are found only for a small number of rays, which is done by rendering into a lower-resolution texture. On the second pass, the obtained information is used to efficiently calculate the intersection points of all the other. The number of rays to use during the first pass is determined by using an adaptive algorithm, which runs on the central processing unit(CPU) in parallel with the second pass of the rendering. The proposed approach allows to significantly speed up isosurface visualization without quality loss. Experiments show acceleration up to 10 times in comparison with a common ray casting method implemented on GPU. To the authors’ knowledge, this is the fastest approach for ray casting which does not require any preprocessing and could be run on common GPUs.

关键词： Adaptive algorithms isosurface rendering ray casting volume visualization