Journal of Contemporary Physics (Armenian Academy of Sciences)最新文献

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Single-Photon Thermoelectric Detector Sensor with Superconducting Molybdenum Absorber 超导钼吸收体单光子热电探测器传感器
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700386
A. A. Kuzanyan, V. R. Nikoghosyan, A. S. Kuzanyan
{"title":"Single-Photon Thermoelectric Detector Sensor with Superconducting Molybdenum Absorber","authors":"A. A. Kuzanyan,&nbsp;V. R. Nikoghosyan,&nbsp;A. S. Kuzanyan","doi":"10.1134/S1068337226700386","DOIUrl":"10.1134/S1068337226700386","url":null,"abstract":"<p>The possibility of creating a single-photon detector sensor with a molybdenum absorber and heat sink, lanthanum-cerium hexoboride as the thermoelectric layer, and a sapphire dielectric substrate is considered. Using computer modeling, the absorption of single photons with energies of 0.8, 1.65, and 3.1 eV in a sensor with a surface area of 1 and 0.25 μm<sup>2</sup> at an operating temperature of 0.5 and 0.8 K is studied. The results of both heat propagation in a three-layer sensor and determination of the signal power, equivalent noise power, and signal-to-noise ratio are presented. The temporal dependences of the temperature in different areas of the sensor and the average surface temperature of the layers are studied. The maximum temperature, the time to reach the maximum, the time of temperature decay to the background level, and the characteristics of the temperature gradient at the boundaries of the thermoelectric layer are determined. Systematization of the obtained data made it possible to determine the optimal sensor design for efficient registration of single photons from the near infrared to ultraviolet spectral region.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"105 - 111"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394778","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 Hydrogen Molecule in the Heitler–London Model in First-Order Perturbation Theory 一阶微扰理论中Heitler-London模型中的氢分子
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700362
V. A. Harutyunyan
{"title":"The Hydrogen Molecule in the Heitler–London Model in First-Order Perturbation Theory","authors":"V. A. Harutyunyan","doi":"10.1134/S1068337226700362","DOIUrl":"10.1134/S1068337226700362","url":null,"abstract":"<p>Within the framework of the Heitler–London model applied to the hydrogen molecule in its ground state, the contributions to the binding energy from three types of interactions are compared: electron–electron interaction including exchange, internuclear interaction, and the interaction of each electron with the neighboring nucleus. It is shown that, in the first order of perturbation theory, the exchange interaction gives a positive contribution, which corresponds to mutual repulsion rather than the expected attraction. This is because the ground-state wave function of the atom does not change sign. Thus, the attraction between atoms in the first order is due only to the interaction of each electron with the neighboring nucleus. In addition, a coordinate transformation is found that makes it possible to obtain analytical expressions for the normalization coefficient of the two-electron wave function, which allows saving computational time.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"50 - 54"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394781","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
Rare Clustering Processes in Nuclei in the Intermediate Mass Range 中质量范围内核的罕见聚类过程
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700283
A. R. Balabekyan, G. H. Hovhannisyan, S. V. Gaginyan, S. G. Poghosyan, M. A. Khachatryan, E. L. Karapetyan, J. R. Drnoyan, K. Katovsky
{"title":"Rare Clustering Processes in Nuclei in the Intermediate Mass Range","authors":"A. R. Balabekyan,&nbsp;G. H. Hovhannisyan,&nbsp;S. V. Gaginyan,&nbsp;S. G. Poghosyan,&nbsp;M. A. Khachatryan,&nbsp;E. L. Karapetyan,&nbsp;J. R. Drnoyan,&nbsp;K. Katovsky","doi":"10.1134/S1068337226700283","DOIUrl":"10.1134/S1068337226700283","url":null,"abstract":"<p>Rare clustering processes in vanadium and enriched nickel nuclei were investigated. In particular, reactions involving the emission of one or two alpha particles, as well as fission processes in these targets, were studied. Calculations were performed using the TALYS code. It was found that the induced activity method can be used to investigate the probability of the <sup>64</sup>Ni(<i>p</i>, 2α <i>n</i>)<sup>56</sup>Mn reaction. Calculations show that there is a real possibility of registering heavier fragments, for example, the isotope <sup>48</sup>Sc, which is formed during the interaction of protons with enriched nickel.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"1 - 5"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394853","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
Analysis of Surface States of Crystals Using Ideas of Dynamical Theory of Diffraction 用衍射动力学理论分析晶体表面态
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700295
M. K. Balyan
{"title":"Analysis of Surface States of Crystals Using Ideas of Dynamical Theory of Diffraction","authors":"M. K. Balyan","doi":"10.1134/S1068337226700295","DOIUrl":"10.1134/S1068337226700295","url":null,"abstract":"<p>Dynamical theory of surface states of nearly free electrons in a semi-infinite crystal are investigated. In addition to the results known in the theory of Bloch wave formalism with a complex wave vector, some new results were obtained. In particular, it is shown that surface states can be realized only at sufficiently small Bragg angles. An estimate of this angle is obtained. The width of the spatial localization region of electrons near the surface is also estimated. It is found that it is of the order of several tens of Ångströms.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"76 - 83"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394855","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
First-Principles Study of B1 – xGaxPyBi1 – y Quaternary Alloys for Near-Infrared Optoelectronic, Spectroscopic and Sensing Applications B1 - xGaxPyBi1 - y四元合金在近红外光电、光谱和传感应用中的第一性原理研究
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700416
S. Touam, N. Mounis, F. Guenfoud, I. Bendjedide, S. Chelli, F. Z. Khelifati, D. Lamrous, O. Belaidi, S. Ghemid, H. Meradji
{"title":"First-Principles Study of B1 – xGaxPyBi1 – y Quaternary Alloys for Near-Infrared Optoelectronic, Spectroscopic and Sensing Applications","authors":"S. Touam,&nbsp;N. Mounis,&nbsp;F. Guenfoud,&nbsp;I. Bendjedide,&nbsp;S. Chelli,&nbsp;F. Z. Khelifati,&nbsp;D. Lamrous,&nbsp;O. Belaidi,&nbsp;S. Ghemid,&nbsp;H. Meradji","doi":"10.1134/S1068337226700416","DOIUrl":"10.1134/S1068337226700416","url":null,"abstract":"<p>We realized an exhaustive study about structural, electronic and optical properties of the quaternary alloys B<sub>1 –</sub> <sub><i>x</i></sub>Ga<sub><i>x</i></sub>P<sub><i>y</i></sub>Bi<sub>1 –</sub> <sub><i>y</i></sub> in zinc blend phase by applying the full-potential augmented plane wave method FP-LAPW within the scope of density functional theory DFT. Potentials were determined using modified generalized gradient GGA and Becke-Johnson approximations. We analyzed the effects of the compositions (<i>x</i>, <i>y</i>) on the lattice parameters, bulk modulus, and band gap energy, revealing a non linear dependence of these quantities. We also investigated several optical constants, including the real and imaginary parts of the dielectric function, the absorption coefficient α(ω), the refractive index <i>n</i>(ω), and the reflectivity. Our obtained results about lattice parameters, energetic gaps and optical constants for the binary compounds are in well correspondence with the provided experimental and theoretical values. However, for alloys, differences were observed against linearity for lattice constants and bulk modulus. Moreover, we examined the energy band of zinc-based quaternary alloys B<sub>1 –</sub> <sub><i>x</i></sub>Ga<sub><i>x</i></sub>P<sub><i>y</i></sub>Bi<sub>1 –</sub> <sub><i>y</i></sub> those corresponding to ZnS lattice. It is worth mentioning that this study represents an innovative contribution in the domain of quaternary alloys, since it is the first theoretical analysis about these alloys.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"28 - 39"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394856","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
Oxyfluoride Barium Boroaluminosilicate Glasses Activated with Neodymium and Erbium Ions: Optical Properties 钕和铒离子活化的氟氧硼铝硅酸盐钡玻璃:光学性质
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700246
N. R. Aghamalyan, Ye. A. Kafadaryan, N. B. Knyazyan, G. G. Manukyan, V. V. Baghramyan, A. S. Saakov, S. V. Mkrtchyan, A. Y. Aleksanyan, L. A. Poghosyan, M. N. Nersisyan
{"title":"Oxyfluoride Barium Boroaluminosilicate Glasses Activated with Neodymium and Erbium Ions: Optical Properties","authors":"N. R. Aghamalyan,&nbsp;Ye. A. Kafadaryan,&nbsp;N. B. Knyazyan,&nbsp;G. G. Manukyan,&nbsp;V. V. Baghramyan,&nbsp;A. S. Saakov,&nbsp;S. V. Mkrtchyan,&nbsp;A. Y. Aleksanyan,&nbsp;L. A. Poghosyan,&nbsp;M. N. Nersisyan","doi":"10.1134/S1068337226700246","DOIUrl":"10.1134/S1068337226700246","url":null,"abstract":"<p>The absorption and luminescence properties of Er<sup>3+</sup> and Nd<sup>3+</sup> ions in oxyfluoride barium boroaluminosilicate glasses of the BaO/BaF<sub>2</sub>–SiO<sub>2</sub>–B<sub>2</sub>O<sub>3</sub>–Al<sub>2</sub>O<sub>3</sub> system were investigated by recording optical absorption and photoluminescence spectra. Photoluminescence of neodymium ions was exciting using laser radiation at a wavelength of 808 nm. Emission on the three main <sup>4</sup><i>F</i><sub>3/2</sub> → <sup>4</sup><i>I</i><sub><i>J</i></sub> transitions of Nd<sup>3+</sup> ions was observed at wavelengths of 890, 1060, and 1330 nm. Laser radiation at wavelengths of 808 and 980 nm was used to excite infrared emission of erbium ions at ∼1550 nm, corresponding to the <sup>4</sup><i>I</i><sub>13/2</sub> → <sup>4</sup><i>I</i><sub>15/2</sub> transition, as well as to excite upconversion (UC) emission of Er<sup>3+</sup> ions in the visible spectral range, including blue (<sup>2</sup><i>H</i><sub>9/2</sub> → <sup>4</sup><i>I</i><sub>15/2</sub>), green (<sup>2</sup><i>H</i><sub>11/2</sub>, <sup>4</sup><i>S</i><sub>3/2</sub> → <sup>4</sup><i>I</i><sub>15/2</sub>), and red (<sup>4</sup><i>F</i><sub>9/2</sub> → <sup>4</sup><i>I</i><sub>15/2</sub>) luminescence bands.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"55 - 61"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394824","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
Contribution of Individual Harmonics to the Power of Circularly Polarized Synchrotron Radiation 个别谐波对圆极化同步辐射功率的贡献
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700313
S. E. Boichenko
{"title":"Contribution of Individual Harmonics to the Power of Circularly Polarized Synchrotron Radiation","authors":"S. E. Boichenko","doi":"10.1134/S1068337226700313","DOIUrl":"10.1134/S1068337226700313","url":null,"abstract":"<p>The characteristics of circularly polarized synchrotron radiation are studied theoretically and numerically. Analytical expressions for partial contributions to the synchrotron radiation power are derived in both the non-relativistic and ultra-relativistic limits. It is demonstrated that for each harmonic exhibits a maximum in its partial contribution. As in the case of linear polarization, for each pair of adjacent harmonics, there is a threshold particle velocity at which the contribution of the harmonic with the higher number becomes more significant.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"6 - 13"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394819","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
X-Ray Dynamical Diffraction Interferometer with Wave Front Division Using Two Asymmetrical Reflections 采用两个不对称反射波前分割的x射线动态衍射干涉仪
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700301
M. K. Balyan, V. P. Mkrtchyan, A. P. Aivazyan, S. A. Petrosyan
{"title":"X-Ray Dynamical Diffraction Interferometer with Wave Front Division Using Two Asymmetrical Reflections","authors":"M. K. Balyan,&nbsp;V. P. Mkrtchyan,&nbsp;A. P. Aivazyan,&nbsp;S. A. Petrosyan","doi":"10.1134/S1068337226700301","DOIUrl":"10.1134/S1068337226700301","url":null,"abstract":"<p>To obtain dynamical diffraction double-slit interference fringes and to achieve the necessary degree of collimation and monochromaticity of the beam, it is proposed to use double asymmetric reflection from two crystals in front of the two slits. An expression for the amplitude of the diffracted wave at the exit surface of the third crystal, placed after two slits, was found. The condition for the asymmetry coefficients of crystals under which the interference fringes will be observed is obtained. Examples show that the obtained condition makes it easy to find many cases of asymmetric double reflections, allowing the observation of dynamic-diffraction interference fringes using a non-monochromatic extended source.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"62 - 70"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394821","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
Nonlinear Optical Method for Recording the Chirp of a Femtosecond Infrared Laser Pulse 飞秒红外激光脉冲啁啾的非线性光学记录方法
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700404
M. L. Movsisyan, D. L. Hovhannisyan
{"title":"Nonlinear Optical Method for Recording the Chirp of a Femtosecond Infrared Laser Pulse","authors":"M. L. Movsisyan,&nbsp;D. L. Hovhannisyan","doi":"10.1134/S1068337226700404","DOIUrl":"10.1134/S1068337226700404","url":null,"abstract":"<p>A new method for recording the chirp of a femtosecond IR laser pulse is proposed, based on a non-collinear generation of the sum harmonic by a transform-limited IR femtosecond pulse and a pulse with a spectral supercontinuum. This paper presents the time dependences of the instantaneous frequency of an IR pulse with a spectral supercontinuum, obtained from two-dimensional dynamic spectrogram distributions. It is shown that the relative error in determining the chirp of a femtosecond IR laser pulse by the proposed method does not exceed 10%. The presented results can be used to develop a nonlinear optical phase correlator to determine the phase and temporal profile of a femtosecond laser pulse in the mid-IR range.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"96 - 104"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394854","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
DNA Sequencing by the Ionic Blockade Currents Method 离子阻断电流法DNA测序
IF 0.5 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2026-07-08 DOI: 10.1134/S1068337226700350
F. V. Gasparyan, L. F. Gasparyan, V. V. Simonyan
{"title":"DNA Sequencing by the Ionic Blockade Currents Method","authors":"F. V. Gasparyan,&nbsp;L. F. Gasparyan,&nbsp;V. V. Simonyan","doi":"10.1134/S1068337226700350","DOIUrl":"10.1134/S1068337226700350","url":null,"abstract":"<p>The solid-state nanopore probing technology can be useful for identifying the sequence of biological polymers. In nanopore experiments, the useful signal measured is the ionic current that passes through a nanopore while it is blocked nucleotides of a DNA molecule. The correlation between ionic blockade current passing through the nanopore, the geometric configuration of the pore, and the DNA sequence is the challenge addressed in this publication. The ionic blockade current was calculated and its histogram was constructed. An analysis of the effect of the nanopore size on the ionic blockade current was carried out. A detailed analysis of the dynamics of a DNA molecule in aqueous solution under the action of gravity, electrophoretic force and drag force is carried out. Analytical dependencies of the translocation rate of a DNA molecule through a nanopore on molecule’s approach time to the nanopore, and on the applied voltage are obtained and analyzed. Numerical calculations were performed for dsDNA. Cases of coincidence and vice versa of the direction of the applied electric field with gravity are considered. For the case where the electrophoretic force is directed opposite to gravity, DNA movement slows down and the translocation rate decreases. Recommendations are provided for increasing the accuracy of reading DNA molecules. Reducing the time it takes for DNA to approach the pore can reduce the translocation rate to hundreds and thousands of nm/s. When interpreting the dynamics of the DNA molecule in aqueous solution, a new effect is introduced, which we call the “proton seduction effect”.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"61 1","pages":"112 - 121"},"PeriodicalIF":0.5,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394867","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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