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The Thermal Expansion Coefficient of Fish Oil: Experiment and Calculation 鱼油的热膨胀系数：实验与计算
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2025-05-04 DOI: 10.1134/S1028335825700041
Z. I. Zaripov, S. V. Mazanov, J. M. Kouagou, D. D. Hounkpatin, M. J. Fonkou, M. S. Kurbangaleev
{"title":"The Thermal Expansion Coefficient of Fish Oil: Experiment and Calculation","authors":"Z. I. Zaripov,&nbsp;S. V. Mazanov,&nbsp;J. M. Kouagou,&nbsp;D. D. Hounkpatin,&nbsp;M. J. Fonkou,&nbsp;M. S. Kurbangaleev","doi":"10.1134/S1028335825700041","DOIUrl":"10.1134/S1028335825700041","url":null,"abstract":"<p>The thermal expansion coefficients of fish oil were measured in a heat-conducting calorimeter in the temperature range of 298–363 K and pressures of 0.098–49 MPa. Based on the obtained values of the coefficients of thermal expansion, the density of fish oil was calculated.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"69 1-3","pages":"19 - 22"},"PeriodicalIF":0.6,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904797","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
Diagnostics of Monolithic Polycarbonate Destruction Using the Piezoelectric Effect Method 用压电效应法诊断聚碳酸酯整体破坏
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2025-05-04 DOI: 10.1134/S1028335825700028
E. A. Bobina, M. P. Danilaev, M. A. Klabukov, V. A. Kuklin
{"title":"Diagnostics of Monolithic Polycarbonate Destruction Using the Piezoelectric Effect Method","authors":"E. A. Bobina,&nbsp;M. P. Danilaev,&nbsp;M. A. Klabukov,&nbsp;V. A. Kuklin","doi":"10.1134/S1028335825700028","DOIUrl":"10.1134/S1028335825700028","url":null,"abstract":"<p>An approach to transparent monolithic polycarbonate fracture diagnostics based on the piezoelectric effect is considered. It was shown that the Δ<i>U</i>/<i>U</i> parameter decreases by at least 10 times before the polycarbonate sample begins to be destroyed. It was shown that the electrodes location influence the changes in the piezoelectric voltage. The location of electrodes along the edge of the sample can provide the best conformity between the piezoelectric voltage and the reaction force of the sample to bending deformation.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"69 1-3","pages":"1 - 5"},"PeriodicalIF":0.6,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904795","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
Obtaining Nanocomposition Materials Based on Thermodynamically Incompatible Polymers Using Supercritical Fluid Technologies 超临界流体技术制备基于热不相容聚合物的纳米复合材料
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2025-05-04 DOI: 10.1134/S1028335825700053
I. Sh. Khabriev, V. F. Khairutdinov, L. Yu. Yarullin, F. M. Gumerov, L. Yu. Sabirova
{"title":"Obtaining Nanocomposition Materials Based on Thermodynamically Incompatible Polymers Using Supercritical Fluid Technologies","authors":"I. Sh. Khabriev,&nbsp;V. F. Khairutdinov,&nbsp;L. Yu. Yarullin,&nbsp;F. M. Gumerov,&nbsp;L. Yu. Sabirova","doi":"10.1134/S1028335825700053","DOIUrl":"10.1134/S1028335825700053","url":null,"abstract":"<p>The results of an experimental study of the swelling of SEVA-113 and polycarbonate polymers in supercritical carbon dioxide are presented. The effects of temperature and pressure on the character of swelling of the selected polymers in supercritical carbon dioxide has been established. The results of joint dispersion of polymer mixtures of EVA and polycarbonate are presented.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"69 1-3","pages":"12 - 15"},"PeriodicalIF":0.6,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904794","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
Neural Network Modeling of Heat-Exchange Properties for Surface Intensification of Heat Exchangers 热交换器表面强化换热特性的神经网络建模
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2025-05-04 DOI: 10.1134/S102833582570003X
K. Kh. Gilfanov, R. A. Shakirov
{"title":"Neural Network Modeling of Heat-Exchange Properties for Surface Intensification of Heat Exchangers","authors":"K. Kh. Gilfanov,&nbsp;R. A. Shakirov","doi":"10.1134/S102833582570003X","DOIUrl":"10.1134/S102833582570003X","url":null,"abstract":"<div><p>The results and methods of neural network modeling of the average heat transfer during the intensification of a heat exchange surface are presented. The results of neural network modeling are presented for the following types of surface intensifiers: ring, spherical, cylindrical, oval-ditch recesses, and protrusions. The training data of the artificial neural network was formed on the basis of experimental data. For each type of surface intensifiers, graphs of the network test results spread relative to the actual values of the experimental matrix are given.</p></div>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"69 1-3","pages":"6 - 11"},"PeriodicalIF":0.6,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904793","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
Solubility of Polymers in Organic Solvents 聚合物在有机溶剂中的溶解度
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2025-05-04 DOI: 10.1134/S1028335825700065
V. F. Khairutdinov, I. Sh. Khabriev, R. M. Khuzakhanov, F. M. Gumerov, L. Yu. Sabirova, S. V. Mazanov
{"title":"Solubility of Polymers in Organic Solvents","authors":"V. F. Khairutdinov,&nbsp;I. Sh. Khabriev,&nbsp;R. M. Khuzakhanov,&nbsp;F. M. Gumerov,&nbsp;L. Yu. Sabirova,&nbsp;S. V. Mazanov","doi":"10.1134/S1028335825700065","DOIUrl":"10.1134/S1028335825700065","url":null,"abstract":"<p>The results of an experimental study of the solubility of the polymers SEVA-113 and SKN-18 in organic solvents in the temperature range from 26 to 60°C at atmospheric pressure are presented. The optimal organic solvents have been determined. The effect of temperature on the character of solubility of the selected polymers in organic solvents has been established.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"69 1-3","pages":"16 - 18"},"PeriodicalIF":0.6,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904796","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 to the Creep Problem of a Viscoelastic Material in a Round Tube 圆管中粘弹性材料蠕变问题的解析解
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-03-01 DOI: 10.1134/S1028335823120054
L. V. Kovtanyuk
{"title":"Analytical Solution to the Creep Problem of a Viscoelastic Material in a Round Tube","authors":"L. V. Kovtanyuk","doi":"10.1134/S1028335823120054","DOIUrl":"10.1134/S1028335823120054","url":null,"abstract":"<p>With the use of a mathematical model of large deformations of materials with elastic, plastic, and viscous properties, an analytical solution was obtained for deformation under creep conditions of a plug in a round tube with a varying pressure drop. The motion is considered taking into account the sliding of the material in the vicinity of the rigid wall of the pipe and its deformation under increasing, constant, and decreasing pressure. The displacements, reversible and irreversible deformations, and stresses at all stages of deformation, including residual deformations and stresses at full unloading, are calculated.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 12","pages":"422 - 425"},"PeriodicalIF":0.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140004619","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 Effect of Accelerated Absorption of Liquid in a Tube during Laser Cavitation on a Laser Heating Element 激光空化过程中管内液体加速吸收对激光加热元件的影响
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-03-01 DOI: 10.1134/S1028335823110046
V. M. Chudnovskii,  M. A. Guzev, E. P. Dats, A. V. Kulik
{"title":"The Effect of Accelerated Absorption of Liquid in a Tube during Laser Cavitation on a Laser Heating Element","authors":"V. M. Chudnovskii,&nbsp; M. A. Guzev,&nbsp;E. P. Dats,&nbsp;A. V. Kulik","doi":"10.1134/S1028335823110046","DOIUrl":"10.1134/S1028335823110046","url":null,"abstract":"<p>The expansion and collapse of a cavitation bubble during laser heating and subcooled boiling of water in the vicinity of the tip of an optical fiber (laser heating element) installed in a water-filled glass tube with two open ends is studied experimentally and numerically. Cavitation, initiated by continuous laser radiation, is accompanied by the pushing and pulling movement of the heated liquid in the tube and outside it. For the first time, it has been shown that in a tube with an installed laser heating element in a liquid flow moving behind the walls of the bubble, when it collapses at the pole of the bubble surface remote from the end, a liquid jet appears, directed through the bubble to the end of the optical fiber. The jet speeds up the process of sucking liquid into the tube.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 11","pages":"376 - 381"},"PeriodicalIF":0.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140004748","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 10 GHz Monolithic Filter Based on Stripline Resonators with a Split Conductor 基于带分裂导体条纹谐振器的 10 GHz 单片式滤波器
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-03-01 DOI: 10.1134/S1028335823120030
I. V. Govorun, B. A. Belyaev, Ya. B. Zav’yalov, T. Y. Shumilov, A. O. Afonin, A. V. Ugryumov, R. G. Galeev
{"title":"A 10 GHz Monolithic Filter Based on Stripline Resonators with a Split Conductor","authors":"I. V. Govorun,&nbsp;B. A. Belyaev,&nbsp;Ya. B. Zav’yalov,&nbsp;T. Y. Shumilov,&nbsp;A. O. Afonin,&nbsp;A. V. Ugryumov,&nbsp;R. G. Galeev","doi":"10.1134/S1028335823120030","DOIUrl":"10.1134/S1028335823120030","url":null,"abstract":"<p>The monolithic design of a compact bandpass filter X-band is made on the technology of multilayered printed circuit boards. Quarter-wave stripline resonators of the filter have two conductors divided by a layer of prepreg having low parameters that bond together the design. This eliminates the influence of the prepreg on the characteristics of the devices, ensuring good repeatability of filters in mass production. To increase the high-frequency stopband of the filter, one of the conductors of each resonator is cut in half by a transverse slit. The constructive sizes of the device were obtained by parametric synthesis using the electrodynamic analysis of its 3D model. The experimental data of the five-order filter are in good agreement with the electromagnetic simulation of filter of the 3D model. The experimental device has a central frequency of the passband of 10 GHz and a fractional bandwidth of 5.7%, and its dimensions and weight are 18.0 × 5.4 × 2.1 mm<sup>3</sup> and 0.5 g. The important advantage of the developed design is the possibility of its installation on the board using the surface mounting method.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 12","pages":"434 - 439"},"PeriodicalIF":0.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140004742","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
Current Trends in the Creation of High-Energy Repetitively Pulsed Continuous Wave Lasers 创建高能重复脉冲连续波激光器的当前趋势
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-03-01 DOI: 10.1134/S1028335823120029
S. G. Garanin, V. N. Derkach, K. N. Makarov, V. A. Ostrovsky, M. I. Pergament, M. V. Putilin, D. V. Sizmin
{"title":"Current Trends in the Creation of High-Energy Repetitively Pulsed Continuous Wave Lasers","authors":"S. G. Garanin,&nbsp;V. N. Derkach,&nbsp;K. N. Makarov,&nbsp;V. A. Ostrovsky,&nbsp;M. I. Pergament,&nbsp;M. V. Putilin,&nbsp;D. V. Sizmin","doi":"10.1134/S1028335823120029","DOIUrl":"10.1134/S1028335823120029","url":null,"abstract":"<p>The current trends in the creation of high-energy repetitively pulsed continuous wave lasers with pulse energies of tens and hundreds of joules are considered. Active media are analyzed for their use in such lasers. The Yb:YAG active crystalline and ceramic elements produced in Russia are experimentally studied at temperatures from 100 to 295 K. The data of the cryogenic cooling system for active elements are presented. A diode pumping system for active elements and a homogenizer for its emission are described. The physical and technical characteristics of the pumping system are given. Fresnel losses, absorption losses, and losses due to enhanced spontaneous emission, which reduce the energy stored in the inverse population, are measured experimentally. The results of measuring the gain in multi-pass circuits with different sets of active elements are presented.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 12","pages":"401 - 409"},"PeriodicalIF":0.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140004755","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
Exact Solutions to Inhomogeneous Boundary Value Problems of the Theory of Elasticity in a Rectangle 矩形内弹性理论非均质边值问题的精确解
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-03-01 DOI: 10.1134/S102833582311006X
M. D. Kovalenko, A. P. Kerzhaev, I. V. Menshova, Yu. N. Karnet
{"title":"Exact Solutions to Inhomogeneous Boundary Value Problems of the Theory of Elasticity in a Rectangle","authors":"M. D. Kovalenko,&nbsp;A. P. Kerzhaev,&nbsp;I. V. Menshova,&nbsp;Yu. N. Karnet","doi":"10.1134/S102833582311006X","DOIUrl":"10.1134/S102833582311006X","url":null,"abstract":"<p>A method is proposed for building exact solutions to boundary value problems of the theory of elasticity in a rectangle with stiffeners located inside a region (the inhomogeneous problem). The solutions are presented as series in Papkovich–Fadle eigenfunctions with explicitly determined coefficients. The method is based on the Papkovich orthogonality relation and the developed theory of expansions in the Papkovich–Fadle eigenfunctions in homogeneous boundary value problems of the theory of elasticity in a rectangle (the biharmonic problem). The solution sequence is demonstrated by the example of an even symmetric problem for a rectangle in which the sides are free and an external load acts along a stiffener located on the axis of symmetry of the rectangle.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 11","pages":"382 - 386"},"PeriodicalIF":0.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140004615","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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