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Acousto-Optic Wavelet Processing of Bioelectric Signals 生物电信号的声光小波处理
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170236
K. V. Zaichenko, B. S. Gurevich
{"title":"Acousto-Optic Wavelet Processing of Bioelectric Signals","authors":"K. V. Zaichenko, B. S. Gurevich","doi":"10.1134/s1063785023170236","DOIUrl":"https://doi.org/10.1134/s1063785023170236","url":null,"abstract":"<p><b>Abstract</b>—Wavelet analysis is one of the most efficient methods of the informative signals characteristics investigation. First shown the possibility of informative signals wavelet processing by means of the acousto-optic processor with time integration. The possibility of the realization of both power spectrum calculation and performance of wavelet transform of bioelectric signals in the real time mode has been proved. The analysis is listed which describes its operation in different modes.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"30 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analytical Solution of the Problem of Synthesis of Three-Link Stepped Chebyshev’s Microwave Filter 三链路阶跃切比雪夫微波滤波器合成问题的解析解
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180025
A. S. Aref’ev
{"title":"Analytical Solution of the Problem of Synthesis of Three-Link Stepped Chebyshev’s Microwave Filter","authors":"A. S. Aref’ev","doi":"10.1134/s1063785023180025","DOIUrl":"https://doi.org/10.1134/s1063785023180025","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The problem of synthesis of the three-link stepped Chebyshev’s microwave filter is reduced to two independent fourth-degree equations, including a single link wave impedance as unknown. The solution of Descartes—Euler is applied to these equations. It is proved that, in case wave impedances of extreme links are equal, the problem of the filter synthesis has two solutions. Identical phase-frequency responses correspond to these solutions. It is proved that for each link a product of the wave impedances relating to these solutions is equal to a square of the wave impedance of the transmission line including the filter.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"20 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Method to Detect the Characteristics of Intermittent Generalized Synchronization Based on Calculation of Probability of the Synchronous Regime Observation 基于同步状态观测概率计算的间歇性广义同步特征检测方法
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180116
O. I. Moskalenko, A. A. Koronovskii, A. O. Selskii, E. V. Evstifeev
{"title":"A Method to Detect the Characteristics of Intermittent Generalized Synchronization Based on Calculation of Probability of the Synchronous Regime Observation","authors":"O. I. Moskalenko, A. A. Koronovskii, A. O. Selskii, E. V. Evstifeev","doi":"10.1134/s1063785023180116","DOIUrl":"https://doi.org/10.1134/s1063785023180116","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A method to define the characteristic phases in the behavior of unidirectionally coupled systems located near the boundary of the generalized chaotic synchronization regime onset based on calculating the probability of the synchronous regime observation in an ensemble of coupled systems is proposed. Using the example of unidirectionally coupled Rössler systems in the band chaos regime, we have shown its efficiency in comparison with other known methods for detecting the characteristics of intermittent generalized synchronization.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"30 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research of Dielectric Properties of Oil Dispersed Systems Depending on the Ratio of Asphalt–Resinous Substances 取决于沥青-树脂物质比例的油分散体系介电性能研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180207
R. R. Zinnatullin, L. A. Kovaleva
{"title":"Research of Dielectric Properties of Oil Dispersed Systems Depending on the Ratio of Asphalt–Resinous Substances","authors":"R. R. Zinnatullin, L. A. Kovaleva","doi":"10.1134/s1063785023180207","DOIUrl":"https://doi.org/10.1134/s1063785023180207","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The degree of influence of the electromagnetic field on oil dispersed systems depends on the dielectric properties of these systems, in particular oil. Dielectric properties of oil depend on the content of high molecular weight polar components: asphaltenes and resins. In this regard, a study was carried out of the dielectric properties of oil in the radio-frequency range, depending on the content of asphalt–resinous substances in it. The obtained results of experimental studies show the correlation of dielectric parameters with the ratio of the content of resins and asphaltenes in oil.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"16 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Map of Water–Oil Flow Regimes in a Direct Microchannel 直接微通道中的水-油流态图
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180165
M. I. Pryazhnikov, A. V. Minakov, A. I. Pryazhikov, A. S. Yakimov
{"title":"Map of Water–Oil Flow Regimes in a Direct Microchannel","authors":"M. I. Pryazhnikov, A. V. Minakov, A. I. Pryazhikov, A. S. Yakimov","doi":"10.1134/s1063785023180165","DOIUrl":"https://doi.org/10.1134/s1063785023180165","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The flow regimes of water and crude oil in a <i>Y</i>-type microchannel were studied in a wide range of flow rates. Four different types of water-oil flow regimes have been identified: plug, droplet, parallel and chaotic. The ranges of existence of these flow regimes have been determined. Dependences of the length of water plugs and droplets in oil on various parameters have been established. Maps of the corresponding water-oil flow regimes have been constructed.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"139 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Investigation of the Hydrodynamic Drag of a Slit Microchannel with a Textured Wall 带纹理壁的狭缝微通道的流体动力阻力研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180104
A. S. Lobasov, A. V. Minakov
{"title":"The Investigation of the Hydrodynamic Drag of a Slit Microchannel with a Textured Wall","authors":"A. S. Lobasov, A. V. Minakov","doi":"10.1134/s1063785023180104","DOIUrl":"https://doi.org/10.1134/s1063785023180104","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of numerical investigation of the hydrodynamic drag of a slit microchannel with a textured wall surface, as well as of the pressure drop in such a channel and the effective slip length on the wall for various Reynolds numbers, are presented. The channel height was 10 μm, and the length varied from 25 to 500 μm. It was found that the pressure drop in the textured microchannel was less than in a conventional one at any length. The dependences of the relative pressure drop, friction factor, and effective slip length on the Reynolds number were obtained for various channel lengths. A correlation that describes the dependence of the relative pressure drop on the Reynolds number for small channel lengths was proposed. The friction factor was described by a correlation expressed as 20/Re.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"5 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Irradiation with Accelerated Electrons on the Physical Properties of Polyethylene Terephthalate 加速电子辐照对聚对苯二甲酸乙二醇酯物理特性的影响
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170200
V. A. Sharapova, I. S. Kamantsev, V. P. Shveikin, V. Yu. Ivanov, O. V. Ryaboukhin
{"title":"Influence of Irradiation with Accelerated Electrons on the Physical Properties of Polyethylene Terephthalate","authors":"V. A. Sharapova, I. S. Kamantsev, V. P. Shveikin, V. Yu. Ivanov, O. V. Ryaboukhin","doi":"10.1134/s1063785023170200","DOIUrl":"https://doi.org/10.1134/s1063785023170200","url":null,"abstract":"<p><b>Abstract</b>—The influence of irradiation with accelerated electrons (energy 8.5 MeV, dose 5 kGy) on the physical properties of medical devices made of polyethylene terephthalate (PET) was studied by infrared (IR) spectroscopy. The revealed post-irradiation changes in the IR spectra can be used to justify the choice of the dose of irradiation of PET products with electrons during the radiation sterilization procedure.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"109 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Initial Stages of the Formation of a Pulsed Discharge in a Gap with a Tip–Plane Geometry in Preionized Argon 在预电离氩气中具有尖端平面几何形状的间隙中形成脉冲放电的初始阶段
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170169
V. S. Kurbanismailov, D. V. Tereshonok, G. B. Ragimkhanov, Z. R. Khalikova
{"title":"The Initial Stages of the Formation of a Pulsed Discharge in a Gap with a Tip–Plane Geometry in Preionized Argon","authors":"V. S. Kurbanismailov, D. V. Tereshonok, G. B. Ragimkhanov, Z. R. Khalikova","doi":"10.1134/s1063785023170169","DOIUrl":"https://doi.org/10.1134/s1063785023170169","url":null,"abstract":"<p><b>Abstract</b>—The study of the effect of the initial conditions on the features of the formation and development of the anodic ionization wave between two electrodes with a tip–plane gap geometry in argon at atmospheric pressure is performed on the basis of a two-dimensional axisymmetric drift-diffusion model.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"30 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Relativistic Backward-Wave Oscillator with Longitudinal-Slotted Diffraction Output 带纵向槽式衍射输出的相对论反向波振荡器
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180062
V. V. Kladukhin, S. P. Khramtsov, V. Yu. Yalov
{"title":"Relativistic Backward-Wave Oscillator with Longitudinal-Slotted Diffraction Output","authors":"V. V. Kladukhin, S. P. Khramtsov, V. Yu. Yalov","doi":"10.1134/s1063785023180062","DOIUrl":"https://doi.org/10.1134/s1063785023180062","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of experimental studies evaluating the influence of longitudinal slits in a conical diffraction outlet, combined with an electron collector, of a 10 GHz relativistic BWO (Backward-Wave Oscillator) with an operating mode TM<sub>01</sub> are presented. It has been shown experimentally that replacing a solid conical waveguide with a similar longitudinal-slotted waveguide has little effect on the performance of the BWO. The use of a longitudinally slotted diffraction outlet instead of a continuous one makes it possible to reduce the volume of plasma and microparticles formed on the diffraction outlet surface under the action of an electron beam, and to improve their adsorption and removal.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"9 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing Hydrophobic Properties of ZnO Structures Using Gold Coatings 利用金涂层增强氧化锌结构的疏水特性
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180128
A. E. Muslimov, V. M. Kanevsky
{"title":"Enhancing Hydrophobic Properties of ZnO Structures Using Gold Coatings","authors":"A. E. Muslimov, V. M. Kanevsky","doi":"10.1134/s1063785023180128","DOIUrl":"https://doi.org/10.1134/s1063785023180128","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of enhancement the hydrophobic properties of the ensemble of micro- and nanostructures ZnO as a result of coating with gold was discovered. For the first time, it has been shown that coating the ensemble with a micro- and nanoparticle ZnO layer of gold leads to a sharp increase in the wetting edge angle from 145° to 168° (water drop volume 5 mm<sup>3</sup>) and a decrease in the hydrophobicity/hydrophilicity transition time under ultraviolet irradiation.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"22 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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