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Combustion, Explosion, and Shock Waves最新文献

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Heat and Mass Transfer and Chemical Kinetics in the Combustion of Polymethyl Methacrylate in Air under Free Convection 自由对流条件下聚甲基丙烯酸甲酯在空气中燃烧的传热传质和化学动力学
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2024-01-22 DOI: 10.1134/s0010508223060047
T. A. Bolshova, A. G. Shmakov
{"title":"Heat and Mass Transfer and Chemical Kinetics in the Combustion of Polymethyl Methacrylate in Air under Free Convection","authors":"T. A. Bolshova, A. G. Shmakov","doi":"10.1134/s0010508223060047","DOIUrl":"https://doi.org/10.1134/s0010508223060047","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Heat and mass transfer processes and the rate of fuel oxidation are the determining parameters of combustion of non-premixed gaseous fuel–oxidizer flows and solid-fuel combustion in a gaseous oxidizer. A correct description of these processes is of both scientific and practical interest. The influence of the kinetics of chemical reactions and diffusion of fuel molecules on the thermal and chemical structure of the flame forming around a polymethyl methacrylate (PMMA) sphere in air under natural convection has been studied by numerical simulation. The three-dimensional gas flow around the solid body has been calculated using the full Navier–Stokes equations for a multicomponent mixture taking into account diffusion and heat transfer between the surface and gas, convection, and radiative heat transfer. The kinetic model represents the conjugate reactions both on the condensed material surface and in the gas phase. The formation of the gaseous fuel methyl methacrylate (MMA) on the surface is described by an effective one-step pyrolysis reaction of PMMA. The oxidation of MMA in the gas phase is described by the global reaction C<sub>5</sub>H<sub>8</sub>O<sub>2</sub> + 6O<sub>2</sub> <span>(to)</span> 5CO<sub>2</sub> + 4H<sub>2</sub>O. It has been found that the temperature and species concentration profiles in the flame practically do not depend on the rate constant of this reaction provided that the characteristic reaction time is much less than the characteristic time of MMA diffusion. It has been shown that varying the MMA diffusion coefficient has a significant effect on the thermal and chemical structure of the flame. Increasing the MMA diffusion coefficient increases the maximum flame temperature. The results of the study show that the transport properties of compounds required to calculate their transport coefficients are among the most important parameters for accurate CFD simulation.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Application of Hydrophobic Silicon Dioxide to Improve the Rheological Properties of Strovite-Based Fire Extinguishing Agents 合成和应用疏水性二氧化硅改善石墨基灭火剂的流变特性
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2024-01-22 DOI: 10.1134/s0010508223060096
Y. Huo, I. V. Val’tsifer, A. Sh. Shamsutdinov, N. B. Kondrashova, V. V. Zamashchikov, A. V. P’yankova
{"title":"Synthesis and Application of Hydrophobic Silicon Dioxide to Improve the Rheological Properties of Strovite-Based Fire Extinguishing Agents","authors":"Y. Huo, I. V. Val’tsifer, A. Sh. Shamsutdinov, N. B. Kondrashova, V. V. Zamashchikov, A. V. P’yankova","doi":"10.1134/s0010508223060096","DOIUrl":"https://doi.org/10.1134/s0010508223060096","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The rheological characteristics of struvite-based fire extinguishing powder mixtures are comparatively analyzed when using hydrophobic silicon dioxide as a functional filler, obtained during a single-stage synthesis by various methods. Infrared spectroscopy, scanning electron microscopy, low-temperature nitrogen sorption–desorption, and other methods are used to investigate the influence of the synthesis method on the textural and structural properties of hydrophobic functional fillers of fire extinguishing powder mixtures. It is revealed that the key factor affecting the rheological properties of such mixtures is the uniform distribution of the functional filler over the surface of the particles of a fire extinguishing component (struvite). It is proven that the struvite-based powder composition and the developed functional filler are highly effective for fire extinguishment.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"15 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Explosive Decomposition of High Explosives with Ultrafine Metal Particle Inclusions under the Influence of Pulse Laser Radiation 含超细金属颗粒夹杂物的高爆炸药在脉冲激光辐射影响下的爆炸分解
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2024-01-22 DOI: 10.1134/s0010508223060138
B. P. Aduev, D. R. Nurmukhametov, N. V. Nelyubina, I. Yu. Liskov, G. M. Belokurov
{"title":"Explosive Decomposition of High Explosives with Ultrafine Metal Particle Inclusions under the Influence of Pulse Laser Radiation","authors":"B. P. Aduev, D. R. Nurmukhametov, N. V. Nelyubina, I. Yu. Liskov, G. M. Belokurov","doi":"10.1134/s0010508223060138","DOIUrl":"https://doi.org/10.1134/s0010508223060138","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This study describes a model for initiating an explosive decomposition of composite materials based on high explosives that weakly absorb radiation and ultrafine metal inclusions under the influence of nanosecond laser pulses. The model is based on experimental data obtained by investigating the explosive decomposition of PETN with ultrafine metal particle inclusions (Al, Ni, and Fe). The model serves as a basis for constructing a scientifically grounded algorithm for determining the composition of a material with minimal thresholds for laser initiation of explosive decomposition, which makes it possible to replace most experiments with theoretical calculations and optoacoustic measurements. The algorithm is verified using data from laser initiation of RDX with inclusions of ultrafine iron particles.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"36 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gas Chromatographic Analysis of Methane Pyrolysis Products during Laser Evaporation of CrO $$_{x}$$ /Al2O3 Nanoparticles in a Methane–Argon Medium 甲烷-氩气介质中 CrO $$_{x}$$ /Al2O3 纳米粒子激光蒸发过程中的甲烷热解产物气相色谱分析
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2024-01-22 DOI: 10.1134/s0010508223060059
A. N. Pyryaev, Vl. N. Snytnikov
{"title":"Gas Chromatographic Analysis of Methane Pyrolysis Products during Laser Evaporation of CrO $$_{x}$$ /Al2O3 Nanoparticles in a Methane–Argon Medium","authors":"A. N. Pyryaev, Vl. N. Snytnikov","doi":"10.1134/s0010508223060059","DOIUrl":"https://doi.org/10.1134/s0010508223060059","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This paper presents the results of a chromatographic analysis of gaseous products formed during the laser synthesis of catalytic Cr/Al<sub>2</sub>O<sub>3</sub> nanoparticles in a methane–argon medium. The main difficulties of such studies are noted. Methods for solving this problem and ways to optimize the methane pyrolysis accompanying the laser synthesis of nanoparticles are proposed. The fundamental possibility of simultaneous synthesis of catalytic nanoparticles and their use for methane pyrolysis are demonstrated. The main products of pyrolysis in this process are hydrogen and amorphous carbon. The maximum hydrogen yield is 4% (vol.). It is shown how the process can be optimized to increase the hydrogen yield and expand the range of reaction products for unsaturated hydrocarbons.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"34 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Synthesis Parameters on the Characteristics and Catalytic Activity of Combined Metal Oxide Catalysts of Thermal Decomposition of Ammonium Perchlorate 合成参数对高氯酸铵热分解组合金属氧化物催化剂特性和催化活性的影响
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2024-01-22 DOI: 10.1134/s0010508223060084
I. I. Lebedeva, K. O. Ukhin, M. A. Savast’yanova, N. B. Kondrashova, V. A. Val’tsifer, V. N. Strel’nikov, I. G. Mokrushin
{"title":"Effect of Synthesis Parameters on the Characteristics and Catalytic Activity of Combined Metal Oxide Catalysts of Thermal Decomposition of Ammonium Perchlorate","authors":"I. I. Lebedeva, K. O. Ukhin, M. A. Savast’yanova, N. B. Kondrashova, V. A. Val’tsifer, V. N. Strel’nikov, I. G. Mokrushin","doi":"10.1134/s0010508223060084","DOIUrl":"https://doi.org/10.1134/s0010508223060084","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This paper presents combined metal oxide catalysts for the decomposition of ammonium perchlorate, combining two transition metal oxides (iron and cobalt) deposited on the surface of a carbon support. Combined catalysts are obtained by impregnation and chemical precipitation methods. Catalyst samples containing various phases of iron and cobalt oxides are obtained by varying the calcination temperature. The structural and morphological features of the synthesized catalysts are studied using different methods: X-ray diffraction, scanning electron microscopy, and Brunauer–Emmett–Teller surface area. As shown by the study performed using differential scanning calorimetry, the synthesized combination catalysts manifest high catalytic activity during the thermal decomposition of ammonium perchlorate, reducing the peak temperature of the high-temperature stage of decomposition by more than 60°C.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"39 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Ultrafine Al/B, Ti/B, and Fe/B Powders on the Ignition and Combustion Characteristics of High-Energy Materials 超细 Al/B、Ti/B 和 Fe/B 粉末对高能材料点火和燃烧特性的影响
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2024-01-22 DOI: 10.1134/s0010508223060072
I. V. Sorokin, A. G. Korotkikh
{"title":"Effect of Ultrafine Al/B, Ti/B, and Fe/B Powders on the Ignition and Combustion Characteristics of High-Energy Materials","authors":"I. V. Sorokin, A. G. Korotkikh","doi":"10.1134/s0010508223060072","DOIUrl":"https://doi.org/10.1134/s0010508223060072","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This paper describes a study of the ignition and combustion characteristics of a high-energy material containing ammonium perchlorate, butadiene rubber, and an ultrafine powder mixture of aluminum, titanium, or iron with amorphous boron. An experimental stand based on a CO<sub>2</sub> laser and a constant-pressure bomb is used to measure the ignition delay time and burning rate of the high-energy material while varying the heat flux density and the chamber pressure. It is shown that replacing amorphous boron with ultrafine Al/B, Ti/B, or Fe/B in a high-energy material reduces the heating time and the moment at which a flame appears on the propellant surface due to an increase in the reaction rate and a decrease in the oxidation temperature of these mixtures on the surface of the reaction layer. In this case, the burning rate of the high-energy materials with Me/B at excess pressures increases significantly (up to 240% for Al/B-HEM and up to 120% for Ti/B-HEM at a pressure of 5.0 MPa).</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"28 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Generation of Defects during Shock Compression of Aluminum 铝在冲击压缩过程中产生缺陷
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2024-01-22 DOI: 10.1134/s0010508223060163
S. D. Gilev
{"title":"Generation of Defects during Shock Compression of Aluminum","authors":"S. D. Gilev","doi":"10.1134/s0010508223060163","DOIUrl":"https://doi.org/10.1134/s0010508223060163","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Measurements of the electrical resistance of shock-compressed aluminum are used in the present study to estimate the concentration of point defects generated by the shock wave front. The parameters of the physical state of a thin metal sample are found by means of modeling the shock wave processes in the measurement cell. Experimental values of the specific electrical resistance of aluminum are compared with predictions of the equilibrium electrical resistance model. The proposed model ensures an adequate description of currently available reference data on equilibrium isothermal compression and isobaric heating of aluminum. At the same time, the shock wave experiment yields a higher specific electrical resistance than that predicted by the model of the electrical resistance of an equilibrium defectless crystal. The detected difference in the specific electrical resistances testifies to generation of defects of the crystal structure of the metal subjected to dynamic compression. Under the assumption of predominant formation of vacancies, the concentration of defects in aluminum is estimated as a function of the shock wave pressure. The number of defects in the metal increases with an increase in the shock wave pressure. The data obtained are qualitatively consistent with available results for copper and silver, which allows one to claim that generation of defects under shock compression has common specific features for these metals. The physical state of shock-compressed aluminum is thermodynamically nonequilibrium and includes numerous defects.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"4 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combustion Performance of a Bi2O3/Al/1Me-3N Mixture Depending on Its Prescription Configuration 取决于处方配置的 Bi2O3/Al/1Me-3N 混合物的燃烧性能
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2024-01-22 DOI: 10.1134/s001050822306014x
V. V. Gordeev, M. V. Kazutin, N. V. Kozyrev
{"title":"Combustion Performance of a Bi2O3/Al/1Me-3N Mixture Depending on Its Prescription Configuration","authors":"V. V. Gordeev, M. V. Kazutin, N. V. Kozyrev","doi":"10.1134/s001050822306014x","DOIUrl":"https://doi.org/10.1134/s001050822306014x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This paper describes a study of combustion performance of a Bi<sub>2</sub>O<sub>3</sub>/Al nanothermite mixture with the addition of 1-methyl-3-nitro-1,2,4-triazole (1Me-3N) depending on the content of the latter and the component ratio of a base Bi<sub>2</sub>O<sub>3</sub>/Al nanothermite pair. Adding 1Me-3N to the mixture increases the explosive force, but the latter begins to decrease as soon as the additive content reaches over a certain limit. Depending on the prescription configuration, it is possible to increase the explosive force by 22–29% relative to Bi<sub>2</sub>O<sub>3</sub>/Al nanothermite. Changing the prescription configuration makes it possible to vary the burning rate of Bi<sub>2</sub>O<sub>3</sub>/Al/1Me-3N within a range of 400–690 m/s in charges 2 mm in diameter and within a range of 120–430 m/s in a 0.1-mm thick layer.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"115 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Errors in Using Balance Relations in the Theory of Combustion of Condensed Systems 凝结体系燃烧理论中使用平衡关系的误区
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2023-12-01 DOI: 10.1134/s0010508223060102
{"title":"Errors in Using Balance Relations in the Theory of Combustion of Condensed Systems","authors":"","doi":"10.1134/s0010508223060102","DOIUrl":"https://doi.org/10.1134/s0010508223060102","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Due to the total lack of reliable experimental data on the kinetics of solid-phase transformations at high temperatures, adequate estimates of the ignition and combustion characteristics of real energetic materials are currently unavailable. In combustion theory, balance relations in the form of ignition criteria and in the form of the principle of equivalence of the burning rate increase under the action of a radiant flux to the corresponding increase in the initial temperature are used in most cases without sufficient theoretical justification, what can lead to incorrect results. Numerical simulation of the ignition and combustion of model energetic materials can provide a basis for determining the conditions for the correct use of balance relations. In this work, using a model of unsteady combustion of melting energetic materials, ignition and combustion under the action of a radiant flux have been studied numerically and the fitting coefficients in the balance relations have been obtained. It has been shown that the values of these coefficients depend on the kinetic parameters of solid-phase transformations and the intensity of the external heating source. It is concluded that it is necessary to continue the theoretical research aimed at developing valid approaches to determine the parameters of global reactions in the condensed phase using data on the delay of ignition by heat flux and to determine the correct fitting coefficients when using the equivalence principle.</p> </span>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"29 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculation of Thermochemical and Detonation Parameters of Azido-Acetylenic Derivatives of s-Triazine s-Triazine 的叠氮乙酰基衍生物的热化学和引爆参数计算
IF 1.2 4区 工程技术
Combustion, Explosion, and Shock Waves Pub Date : 2023-12-01 DOI: 10.1134/s0010508223060060
{"title":"Calculation of Thermochemical and Detonation Parameters of Azido-Acetylenic Derivatives of s-Triazine","authors":"","doi":"10.1134/s0010508223060060","DOIUrl":"https://doi.org/10.1134/s0010508223060060","url":null,"abstract":"<span> <h3>Abstract</h3> <p>The properties of azido-acetylenic derivatives of <em>s</em>-triazine containing various combinations of propynyloxy, propynylamino, N-methyl-propynylamino, and azido groups have been studied, and their enthalpy of formation in the condensed phase, density, and impact and friction sensitivities have been determined. Based on these data, the energy parameters of detonation, combustion, and adiabatic transformation for individual compounds and their compositions with the binder SKI-3 isoprene rubber have been calculated. The results of the integrated experimental and theoretical studies suggest a high heat of combustion of the investigated individual compounds and compositions based on them.</p> </span>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"115 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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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