Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477583
V. Chikovani, O. Sushchenko, H. Tsiruk
This paper considers application of fuzzy logic controller (FLC) to compensate for the Coriolis force in rate MEMS gyroscope. Comparative investigation of hybrid FLC-PI, FLC-PID and classical PI and PID controllers has been made to find advantages of any of those controllers under measurement of accumulated angle during shock and step response parameters. In this paper, from four controllers which can be used to control parameters of MEMS gyro, only one is under investigation that responsible for keeping a standing wave in the fix angular position providing accurate angle rate measurement. Hybrid controllers' advantages in presence of noise have been shown.
{"title":"Application of Hybrid Fuzzy Logic Controller to Keep a Standing Wave Angular Position in MEMS Rate Gyroscope","authors":"V. Chikovani, O. Sushchenko, H. Tsiruk","doi":"10.1109/ELNANO.2018.8477583","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477583","url":null,"abstract":"This paper considers application of fuzzy logic controller (FLC) to compensate for the Coriolis force in rate MEMS gyroscope. Comparative investigation of hybrid FLC-PI, FLC-PID and classical PI and PID controllers has been made to find advantages of any of those controllers under measurement of accumulated angle during shock and step response parameters. In this paper, from four controllers which can be used to control parameters of MEMS gyro, only one is under investigation that responsible for keeping a standing wave in the fix angular position providing accurate angle rate measurement. Hybrid controllers' advantages in presence of noise have been shown.","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127984956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477517
S. Khutornenko, V. Lukin, S. Krivenko, D. Vasilchuk, D. Semenets
We propose and study a mathematical model of oscillation frequency of piezo-resonator with one changeable electrode air gap and one constant air gap with respect to quartz crystal. Dependences of conductivity of piezoelectric sensing device on parameters of movable electrode formed by a cylindrical surface for which one of hyperbole branches serves as guide serves are obtained.
{"title":"Oscillation Frequency of Piezoelectric Oscillating System with Electrodes of Hyperbolic and Linear Form in Variable Air Gap","authors":"S. Khutornenko, V. Lukin, S. Krivenko, D. Vasilchuk, D. Semenets","doi":"10.1109/ELNANO.2018.8477517","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477517","url":null,"abstract":"We propose and study a mathematical model of oscillation frequency of piezo-resonator with one changeable electrode air gap and one constant air gap with respect to quartz crystal. Dependences of conductivity of piezoelectric sensing device on parameters of movable electrode formed by a cylindrical surface for which one of hyperbole branches serves as guide serves are obtained.","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131737828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477587
S. Krivenko, A. Pulavskyi, S.A. Krivenko
The non-invasive method for identifying the volunteers suffering from the type 2 diabetes mellitus (T2DM) is suggested. The method is based on the symbolic analysis of short series (∼300 points) of RR-intervals of a single-lead electrocardiogram. To obtain the initial symbol sequences, 4 different methods of formation of symbols from the time series were used. Using the SVM classifier with a linear kernel, a selection of significant symbols was made. The most significant symbols became the input parameters for the SVM model with RB F kernel. The model has shown high efficiency: the sensitivity on the test sets was 70-82%, and the specificity was 73-77%. The proposed method uses the posterior probability, which has been accompanied by a class label for each new sample, being a criterion of the results reliability. For the obtained model, the threshold value of the posterior probability was 91%. It has been shown that the use of the posterior probability does not impair or improve the quality of the forecast. While using the posterior probability, the sensitivity of the model can increase up to 88% and specificity can increase up to 90%, being objective for up to 50% of all predicted values.
{"title":"Identification of Diabetic Patients Using the Nonlinear Analysis of Short-Term Heart Rate Time Series","authors":"S. Krivenko, A. Pulavskyi, S.A. Krivenko","doi":"10.1109/ELNANO.2018.8477587","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477587","url":null,"abstract":"The non-invasive method for identifying the volunteers suffering from the type 2 diabetes mellitus (T2DM) is suggested. The method is based on the symbolic analysis of short series (∼300 points) of RR-intervals of a single-lead electrocardiogram. To obtain the initial symbol sequences, 4 different methods of formation of symbols from the time series were used. Using the SVM classifier with a linear kernel, a selection of significant symbols was made. The most significant symbols became the input parameters for the SVM model with RB F kernel. The model has shown high efficiency: the sensitivity on the test sets was 70-82%, and the specificity was 73-77%. The proposed method uses the posterior probability, which has been accompanied by a class label for each new sample, being a criterion of the results reliability. For the obtained model, the threshold value of the posterior probability was 91%. It has been shown that the use of the posterior probability does not impair or improve the quality of the forecast. While using the posterior probability, the sensitivity of the model can increase up to 88% and specificity can increase up to 90%, being objective for up to 50% of all predicted values.","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129553268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477554
T. Shmeleva
Abstract structures of torus and hypertorus play a key role in nanotechnologies and are widely applied in nanotechnology for design of electronic devices and components. For modeling hypertorus structures, an infinite Petri net model has been developed and investigated. Based on the parametric specification of hypertorus models, an infinite system of linear homogenous equations has been derived. Using the earlier developed ad-hoc algorithm, a parametric solution of the system has been obtained. We can compose, in an explicit form, a solution that contains all the positive components. Thus, the model is a p-invariant Petri net for any given size and number of dimensions of hypertorus. Consequently, we can use storage elements of limited capacity for practical implementations of a hypertorus structure.
{"title":"Analysis of a Hypertorus Grid","authors":"T. Shmeleva","doi":"10.1109/ELNANO.2018.8477554","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477554","url":null,"abstract":"Abstract structures of torus and hypertorus play a key role in nanotechnologies and are widely applied in nanotechnology for design of electronic devices and components. For modeling hypertorus structures, an infinite Petri net model has been developed and investigated. Based on the parametric specification of hypertorus models, an infinite system of linear homogenous equations has been derived. Using the earlier developed ad-hoc algorithm, a parametric solution of the system has been obtained. We can compose, in an explicit form, a solution that contains all the positive components. Thus, the model is a p-invariant Petri net for any given size and number of dimensions of hypertorus. Consequently, we can use storage elements of limited capacity for practical implementations of a hypertorus structure.","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130494171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477522
Valeriia Poliukhova, So-Hye Cho, A. Orlov
Zinc Oxide nanoparticles were synthetized by a simple sol-gel method with pH modifier at a low temperature near 0°C. The required experimental conditions to reach the size of nanoparticles under 50 nm are: dropwise addition of precursor solutions zinc acetate dihydrate and sodium hydroxide in absolute ethanol while stirring in ice bath and isopropanol washing. Obtained ZnO nanopowder was mixed with different nickel chloride amounts by impregnation method and then annealed at 300°C in air. By adding 1% and 5% of nickel a combined system of structures was resulted: ZnO, ZnNixO alloys, and NixO all of which showed a better photocatalytic activity than as-synthetized material. When Ni was used in 10% quantity and the resulting materials showed no alloy phase but only composite structure, ZnO and NixO and exhibited the best photocatalytic activity. In this work the characteristics of all samples were studied by X-ray diffraction (XRD), which reveals the crystallite growth with the increase of the nickel concentration. By scanning electron microscopy (SEM) and transmission electron microscopy (TEM) the morphological properties were examined. Light absorption characteristics were measured in the wavelength range from 350 to 800 nm (UV-Vis spectroscopy). The photocatalytic activity of ZnO-NixO nanoparticles was defined by the degradation of Methylene Blue under the UV-light illumination.
{"title":"ZnO-NiO Composites for Photocatalysis of Methylene Blue","authors":"Valeriia Poliukhova, So-Hye Cho, A. Orlov","doi":"10.1109/ELNANO.2018.8477522","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477522","url":null,"abstract":"Zinc Oxide nanoparticles were synthetized by a simple sol-gel method with pH modifier at a low temperature near 0°C. The required experimental conditions to reach the size of nanoparticles under 50 nm are: dropwise addition of precursor solutions zinc acetate dihydrate and sodium hydroxide in absolute ethanol while stirring in ice bath and isopropanol washing. Obtained ZnO nanopowder was mixed with different nickel chloride amounts by impregnation method and then annealed at 300°C in air. By adding 1% and 5% of nickel a combined system of structures was resulted: ZnO, ZnNixO alloys, and NixO all of which showed a better photocatalytic activity than as-synthetized material. When Ni was used in 10% quantity and the resulting materials showed no alloy phase but only composite structure, ZnO and NixO and exhibited the best photocatalytic activity. In this work the characteristics of all samples were studied by X-ray diffraction (XRD), which reveals the crystallite growth with the increase of the nickel concentration. By scanning electron microscopy (SEM) and transmission electron microscopy (TEM) the morphological properties were examined. Light absorption characteristics were measured in the wavelength range from 350 to 800 nm (UV-Vis spectroscopy). The photocatalytic activity of ZnO-NixO nanoparticles was defined by the degradation of Methylene Blue under the UV-light illumination.","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131078321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477577
N. Filipova, G. Vlasyuk
The problem on the reception of sound in a circular cylindrical multimode converter layer with electroelastic properties of piezoelectric membrane and the transition layer in the “through” setting is considered. Features of the formation of acoustic fields in the working medium in the form of interference patterns and angular distributions of the pressure of a complete receiving cylindrical converter are investigated. The angular characteristics of the total-field distributions at different distances from the surface of a multimode converter are investigated for different types of electrodes when a layer of quarter-wave and half-wave thickness is used.
{"title":"Acoustic Fields of a Piezoceramic Cylindrical Electroelastic Multimode Converter with a Matching Layer","authors":"N. Filipova, G. Vlasyuk","doi":"10.1109/ELNANO.2018.8477577","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477577","url":null,"abstract":"The problem on the reception of sound in a circular cylindrical multimode converter layer with electroelastic properties of piezoelectric membrane and the transition layer in the “through” setting is considered. Features of the formation of acoustic fields in the working medium in the form of interference patterns and angular distributions of the pressure of a complete receiving cylindrical converter are investigated. The angular characteristics of the total-field distributions at different distances from the surface of a multimode converter are investigated for different types of electrodes when a layer of quarter-wave and half-wave thickness is used.","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124285678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477458
K. S. Mazur, D. Tatarchuk, Y. Didenko, A. O. Serheieva
Electromagnetic properties of microstrip lines with stepwise heterogeneity are considered. The methods of control of frequency-selective ultrahigh-frequency devices are analyzed. The two constructions of controled frequency-selective devices on the basis of heterogeneous microstrip lines with electromechanical and optical control by resonance frequency are proposed. The results of the experimental investigations are shown. The prospect of using such structures for the creation of guided frequency selective microwave devices on their basis is shown.
{"title":"Filters Based of Segments of Microstrip Lines","authors":"K. S. Mazur, D. Tatarchuk, Y. Didenko, A. O. Serheieva","doi":"10.1109/ELNANO.2018.8477458","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477458","url":null,"abstract":"Electromagnetic properties of microstrip lines with stepwise heterogeneity are considered. The methods of control of frequency-selective ultrahigh-frequency devices are analyzed. The two constructions of controled frequency-selective devices on the basis of heterogeneous microstrip lines with electromechanical and optical control by resonance frequency are proposed. The results of the experimental investigations are shown. The prospect of using such structures for the creation of guided frequency selective microwave devices on their basis is shown.","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"35 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120870955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477550
O. Salivon, V. Zubchuk, J. Antonova-Rafi, I. Khudetskyy, V. Taranov
Method and device for rapid measurement of nitrate levels in aqueous solutions based on spectrophotometric method. The proposed method was realized with irradiation of test sample and measuring its optical density in the ultraviolet at three wavelengths
{"title":"A Device for Rapid Measurement of Nitrate Levels in Aqueous Solutions Based on Spectrophotometric Method","authors":"O. Salivon, V. Zubchuk, J. Antonova-Rafi, I. Khudetskyy, V. Taranov","doi":"10.1109/ELNANO.2018.8477550","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477550","url":null,"abstract":"Method and device for rapid measurement of nitrate levels in aqueous solutions based on spectrophotometric method. The proposed method was realized with irradiation of test sample and measuring its optical density in the ultraviolet at three wavelengths","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125443268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477474
T. Voitenko, I. Fesych, S. Nedilko, O. Dziazko, M. Zelenko, A. O. Pilipenko, A. Slepets, K. Bychkov, D. Naumova
$mathbf{GdLn}_{mathbf{x}}mathbf{Ba}_{2-mathbf{x}}mathbf{Cu}_{3}mathbf{O}_{mathbf{y}} (mathbf{Ln}=mathbf{La}, 0leq boldsymbol{x}leq 0.6;mathbf{Ln}=mathbf{Nd}, mathbf{Sm, Eu}, 0leq boldsymbol{x}leq 0.5)$ (Gd123:Ln) samples were synthesized using the sol-gel method. The homogeneity region, variation of the crystal lattice and oxygen stoichiometry of the Gd123:Ln solid solutions were studied as a function of the substitution degree $boldsymbol{x}$. It was shown that the homogeneity region becomes wider when going from Eu3+$(boldsymbol{x}leq 0.35)$ to La3+ $(boldsymbol{x}leq 0.5)$, but for all lanthanides the symmetry changes from orthorhombic to tetragonal for $boldsymbol{x}sim 0.05$. Measurements of the electrical resistance of Gd123:Ln samples in the temperature range 77–300 K revealed superconducting transition temperatures over 77 K only for $boldsymbol{x}=0$ and $boldsymbol{x}=0.05$.
{"title":"Effect of Partial Lanthanide Substitutions of Gd123 Submicronic Powder","authors":"T. Voitenko, I. Fesych, S. Nedilko, O. Dziazko, M. Zelenko, A. O. Pilipenko, A. Slepets, K. Bychkov, D. Naumova","doi":"10.1109/ELNANO.2018.8477474","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477474","url":null,"abstract":"<tex>$mathbf{GdLn}_{mathbf{x}}mathbf{Ba}_{2-mathbf{x}}mathbf{Cu}_{3}mathbf{O}_{mathbf{y}} (mathbf{Ln}=mathbf{La}, 0leq boldsymbol{x}leq 0.6;mathbf{Ln}=mathbf{Nd}, mathbf{Sm, Eu}, 0leq boldsymbol{x}leq 0.5)$</tex> (Gd123:Ln) samples were synthesized using the sol-gel method. The homogeneity region, variation of the crystal lattice and oxygen stoichiometry of the Gd123:Ln solid solutions were studied as a function of the substitution degree <tex>$boldsymbol{x}$</tex>. It was shown that the homogeneity region becomes wider when going from Eu<sup>3+</sup> <tex>$(boldsymbol{x}leq 0.35)$</tex> to La<sup>3</sup>+ <tex>$(boldsymbol{x}leq 0.5)$</tex>, but for all lanthanides the symmetry changes from orthorhombic to tetragonal for <tex>$boldsymbol{x}sim 0.05$</tex>. Measurements of the electrical resistance of Gd123:Ln samples in the temperature range 77–300 K revealed superconducting transition temperatures over 77 K only for <tex>$boldsymbol{x}=0$</tex> and <tex>$boldsymbol{x}=0.05$</tex>.","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122041244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-01DOI: 10.1109/ELNANO.2018.8477456
L. Emelyanov, Ya. M. Chepurnyy, O. Bogomaz
Instrumental and methodological features of the incoherent scatter radars operating mode for simultaneously sounding the ionosphere in vertical and oblique directions are considered.
研究了非相干散射雷达垂直和斜向同时探测电离层的仪器和方法特点。
{"title":"Simultaneous Sounding of the Ionosphere in the Vertical and Oblique Directions Using Incoherent Scatter Radar","authors":"L. Emelyanov, Ya. M. Chepurnyy, O. Bogomaz","doi":"10.1109/ELNANO.2018.8477456","DOIUrl":"https://doi.org/10.1109/ELNANO.2018.8477456","url":null,"abstract":"Instrumental and methodological features of the incoherent scatter radars operating mode for simultaneously sounding the ionosphere in vertical and oblique directions are considered.","PeriodicalId":269665,"journal":{"name":"2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128070614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：