Microgravity Science and Technology最新文献

Pioneering the Future of Experimental Space Hardware: MiniFix - a Fully 3D-Printed and Highly Adaptable System for Biological Fixation in Space 开创实验空间硬件的未来：MiniFix -一个完全3d打印和高度适应性的空间生物固定系统

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-04-28 DOI: 10.1007/s12217-025-10178-4

Sebastian Feles, Raphael Keßler, Jens Hauslage

{"title":"Pioneering the Future of Experimental Space Hardware: MiniFix - a Fully 3D-Printed and Highly Adaptable System for Biological Fixation in Space","authors":"Sebastian Feles, Raphael Keßler, Jens Hauslage","doi":"10.1007/s12217-025-10178-4","DOIUrl":"10.1007/s12217-025-10178-4","url":null,"abstract":"<div><p>MiniFix, a syringe-based biological fixation system (SBBFS) is a versatile, fully 3D-printed syringe-driven, stepper motor-operated platform designed for the chemical fixation of biological samples in space-based research. Unlike conventional systems, it leverages additive manufacturing to provide modularity and customizability, enabling manipulation and a chemical fixation of biological samples under altered gravity conditions. MiniFix has performed five successful missions on the MAPHEUS sounding rocket and has demonstrated its reliability and adaptability. The integrated thermal management system uses waste heat from the stepper motors to maintain accurate sample temperature and in turn reduces power consumption and weight. MiniFix is particularly notable for its flexibility, allowing adaptation to diverse biological model systems, from simple organisms to more complex tissue cultures. Its modular design and 3D-printing process enable quick, cost-effective adjustments for different experimental setups. It was successfully printed with three different materials– PLA (Polylactic acid), PETG (Polyethylene terephthalate glycol-modified), and the biodegradable GreenTEC Pro. Its ability to integrate modifications such as illumination further enhances its adaptability for future space missions, for instance with photosynthetic organisms. By offering reliability, modular flexibility, and adaptation to a broad range of biological research goals, the SBBFS represents a new approach to construct flexible hardware for space and gravitational biology.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"37 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12217-025-10178-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Melting Enhancement of Phase Change Material with Fins and Graphene Nanoplatelets Under Micro/Low Gravity for Thermal Management in Space Detector 微/低重力下鳍片和石墨烯纳米片增强相变材料在空间探测器热管理中的熔化

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-04-17 DOI: 10.1007/s12217-025-10175-7

Hao Peng, Kelong Jiang, Jianfu Zhao, Yujuan Gan, Yijun Shen

{"title":"Melting Enhancement of Phase Change Material with Fins and Graphene Nanoplatelets Under Micro/Low Gravity for Thermal Management in Space Detector","authors":"Hao Peng, Kelong Jiang, Jianfu Zhao, Yujuan Gan, Yijun Shen","doi":"10.1007/s12217-025-10175-7","DOIUrl":"10.1007/s12217-025-10175-7","url":null,"abstract":"<div><p>Thermal energy storage is an efficient way for thermal control of near-earth and deep space detectors, but the melting rate is restricted by low heat transfer performance of phase change material (PCM) and disappearance or suppression of natural convection under micro/low gravity. To accelerate melting of PCM under micro/low gravity, graphene nanoplatelet (GNP)-enhanced PCM with fins are proposed. The effects of fin shape, GNP concentration and gravity level on dynamic melting characteristics considering thermocapillary convection are investigated. The results show that the improvement effect of rectangular fins on melting rate is higher than that of triangular fins under microgravity; with the decrease of gravity level, the melting rate is reduced. The presence of GNP significantly promotes the melting under micro/low gravity. At GNP concentration of 0.03 vol%, the reduction of melting time can reach 58.2%, 49.4% and 51.6% at microgravity, moon’s gravity of 1.625 m s<sup>−2</sup> and Mars’ gravity of 3.711 m s<sup>−2</sup>, respectively.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"37 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840455","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

The Effect of Buoyancy Convection and Geometric Variation on Temperature Field of C4F7N-Filled Gas-Insulated Metal Transmission Line 浮力对流和几何变化对c4f7n填充气体绝缘金属传输线温度场的影响

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-04-04 DOI: 10.1007/s12217-025-10173-9

Zihan Chen, Xintong Mao, Wei Liu, Huilong Zhao, Bin Bo, Jia-Jia Yu

{"title":"The Effect of Buoyancy Convection and Geometric Variation on Temperature Field of C4F7N-Filled Gas-Insulated Metal Transmission Line","authors":"Zihan Chen, Xintong Mao, Wei Liu, Huilong Zhao, Bin Bo, Jia-Jia Yu","doi":"10.1007/s12217-025-10173-9","DOIUrl":"10.1007/s12217-025-10173-9","url":null,"abstract":"<div><p>Gas-insulated Metal Transmission Line (GIL) represents a promising alternative to traditional overhead lines for long-distance electric power transmission. The thermal performance of GIL is crucial in determining the dielectric strength of materials, which subsequently affects both transmission capacity and security. In this study, a three-dimensional numerical model is introduced to analyze the coupled relationship between the flow field and temperature field of the environmentally friendly insulating gas perfluoroisobutyronitrile (C<sub>4</sub>F<sub>7</sub>N). The temperature and flow characteristics of C<sub>4</sub>F<sub>7</sub>N are analyzed at different Rayleigh numbers. Besides, the effect of GIL geometric size on the flow dynamics and temperature distribution are discussed. The results reveal that the enhancement of buoyancy convection contributes to the temperature drop of conducting body, which enhances the buoyancy convection in return. When the Rayleigh number is below 5 × 10<sup>5</sup>, the flow in GIL is weak and there is only slight variation in temperature of C<sub>4</sub>F<sub>7</sub>N along the lengthwise direction. However, as the Rayleigh number rises to 5 × 10<sup>5</sup>, the convection become pronounced and distinct variations in temperature distribution along GIL appears. When the Rayleigh number exceeds a threshold value of 1 × 10<sup>7</sup>, the flow instability occurs, leading to an asymmetric temperature distribution as well as the overall temperature drop along GIL. The maximum velocity occurs near the surface of the conduction. As the increase of radius ratio between inner and outer annular surface, both flow intensity strengthens and noticeable reductions in temperature become more apparent. These findings can be utilized for insulation design considerations within GIL systems.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"37 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778149","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

Human Locomotion Monitoring in Space Flight: Retrospective Nonparametric Changepoint Detection Methods 空间飞行中的人体运动监测：回顾性非参数变化点检测方法

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-03-26 DOI: 10.1007/s12217-025-10169-5

A. I. Shestoperov, A. V. Ivchenko, E. V. Fomina

{"title":"Human Locomotion Monitoring in Space Flight: Retrospective Nonparametric Changepoint Detection Methods","authors":"A. I. Shestoperov, A. V. Ivchenko, E. V. Fomina","doi":"10.1007/s12217-025-10169-5","DOIUrl":"10.1007/s12217-025-10169-5","url":null,"abstract":"<div><p>The paper is dedicated to the analysis of medico-biological data obtained during locomotor testing of astronauts. Accurate data interpretation plays a crucial role in locomotion system monitoring, prophylaxis of long-duration spaceflight negative effects and thus in the development of an autonomous medical support system for deep space expeditions. During the locomotor testing the astronaut changes motion modes in accordance with the prescribed training protocol while running on the treadmill, and data such as speed, support pressure, heart rate frequency, etc., are collected simultaneously. The astronaut may follow either an individual protocol developed by specialists or perform his personal protocol at every fourth day of the micro cycle. Our task is to identify unknown motion modes by the means of a posteriori time series segmentation and, specifically, in the presence of various transitional processes as well as signal loss periods. The presence of tricky profiles does not allow for preliminary hypotheses about the distribution pattern of the dataset under study. The article consists of two parts. Firstly, it provides a detailed overview of several modern retrospective (offline) nonparametric multiple changepoint detection methods in multidimensional time series. A change point means an abrupt change in the probability properties of the observed series occurring at an unknown time instant. When describing the algorithms, emphasis is placed on statistics as a measure of data homogeneity, numerical methods for solving optimization problems, and model selection methods. Secondly, the real speed profiles resulting from locomotor testing have been handled through the mentioned algorithms. The validation was performed on three characteristic experimental data samples, allowing for an assessment of the prospects of applying the described methods to the entire dataset.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"37 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12217-025-10169-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Weakly Charged Analyte Concentration Scenarios Near an Ion-selective Microparticle 离子选择性微粒子附近的弱电荷分析物浓度情景

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-03-22 DOI: 10.1007/s12217-025-10172-w

Georgy S. Ganchenko, Maxim S. Alekseev, Vladimir S. Shelistov, Evgeny A. Demekhin

{"title":"Weakly Charged Analyte Concentration Scenarios Near an Ion-selective Microparticle","authors":"Georgy S. Ganchenko, Maxim S. Alekseev, Vladimir S. Shelistov, Evgeny A. Demekhin","doi":"10.1007/s12217-025-10172-w","DOIUrl":"10.1007/s12217-025-10172-w","url":null,"abstract":"<div><p>The work presents the results of numerical simulations of a microdevice designed to concentrate a low-concentration analyte consisting of weakly charged macromolecules. The microdevice consists of a spherical chamber containing an ion-selective sphere located in the center. A gravity-induced pressure-driven flow of an electrolyte solution containing the analyte is established through the chamber. Two electrodes are placed at the input and output of the device to create an external electric field. The properties of the analyte typically differ from those of the ions in the buffer electrolyte solution; for instance, its diffusion coefficient is normally much smaller than those of the electrolyte ions. This asymmetry, combined with a nontrivial electroosmotic flow along the ion-selective sphere, results in significant differences in the analyte behavior compared with the behavior of ions. Several scenarios of analyte concentration, based on both its intrinsic properties (different diffusion coefficients and charges) and external factors such as the intensity of an external electric field and the properties of the flow, are investigated.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"37 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668387","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

Design of a Drag-Free Control System for Gravity Field Measurement Satellite Based on a Cusped Hall Electric Propulsion System 基于尖角霍尔电力推进系统的重力场测量卫星无拖曳控制系统设计

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-03-12 DOI: 10.1007/s12217-025-10171-x

Kai Cui, Jialin Zheng, Kai Xu, Hao Wang, Jing Chen, Xiang Niu

{"title":"Design of a Drag-Free Control System for Gravity Field Measurement Satellite Based on a Cusped Hall Electric Propulsion System","authors":"Kai Cui, Jialin Zheng, Kai Xu, Hao Wang, Jing Chen, Xiang Niu","doi":"10.1007/s12217-025-10171-x","DOIUrl":"10.1007/s12217-025-10171-x","url":null,"abstract":"<div><p>To obtain a more accurate gravity field model, gravity field measurement satellites use the drag-free control system to minimize the residual disturbance force of the satellite. To meet the drag-free control accuracy, these tasks propose the requirements of wide continuous throttling ability, low noise, and rapid response for the propulsion system, which acts as the actuator of the control system. This research takes a cusped Hall electric propulsion system as the research object and constructs a component-level propulsion system model based on experimental data. The drag-free control simulation system is designed. And the control simulation results show that the slow thrust response speed of the propulsion system limits the bandwidth of the control system, resulting in the control accuracy not meeting the mission requirements. To solve this problem, a thrust response speed optimization method based on coordinated control of input parameters of the propulsion system is proposed. The results show that the thrust response speed is improved and the bandwidth of the control system is increased after the coordinated control of the flow rate and the voltage, which makes the residual accelerations of the satellite meet the drag-free control requirements of the gravity field measurement satellite.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"37 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602420","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

Comparison of HepG2 Cell Spheroid Formation Under Bioreactor Productions with Two Mixing Strategies by RCCS and CSTR 比较 RCCS 和 CSTR 两种混合策略下生物反应器生产的 HepG2 细胞球形成情况

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-03-03 DOI: 10.1007/s12217-025-10170-y

Başak Tuğcu, Çağla Yarkent, Yunus Çelik, Ayşe Köse, Suphi S. Oncel

{"title":"Comparison of HepG2 Cell Spheroid Formation Under Bioreactor Productions with Two Mixing Strategies by RCCS and CSTR","authors":"Başak Tuğcu, Çağla Yarkent, Yunus Çelik, Ayşe Köse, Suphi S. Oncel","doi":"10.1007/s12217-025-10170-y","DOIUrl":"10.1007/s12217-025-10170-y","url":null,"abstract":"<div><p>Animal cells can growth in three-dimensional (3D) systems, which provide an excellent opportunity to study natural interactions between cells and their extracellular matrix (ECM) <i>in vivo</i>. In this particular study, a human liver carcinoma cell line (HepG2) was cultured in two different systems: a rotary cell culture system (RCCS) and a continuous stirred tank reactor (CSTR). By simulating microgravity, both reactors facilitated the formation of HepG2 cells into spheroid structures without the need for additional support materials. The HepG2 spheroids exhibited over 80% viability for up to 10 days in both the RCCS and the CSTR. The RCCS provided more suitable conditions for generating well-formed HepG2 spheroids within a 14-day period, whereas the CSTR allowed for more efficient oxygen delivery to the spheroid cells, resulting in higher cell viability despite larger spheroid diameters (200–300 µm). At the end of production, the urea amounts were observed as 8.1 nmol well<sup>−1</sup>, and 9.5 nmol well<sup>−1</sup> in the CSTR, and the RCCS, respectively. For the first 6 days, the spheroids in the RCCS produced more albumin (1.18 ± 0.003 ng mL<sup>−1</sup>), then, on the 8th day, it was 1.22 ± 0.015 ng mL<sup>−1</sup> in the CSTR. The monolayer HepG2 cells and HepG2 spheroids exhibited IC<sub>50</sub> values of 250–500 mM and 1300–2200 mM against ethanol, respectively. These findings highlight the remarkable potential of bioreactors in producing animal cell lines in 3D systems, providing valuable insights into cellular behavior and paving the way for the scalable production of intricate tissue constructs.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"37 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12217-025-10170-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Bulk Flow Pulsation on the Filtering Process for Porous Columns with Different Permeability 体流脉动对不同渗透率多孔柱过滤过程的影响

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-02-20 DOI: 10.1007/s12217-024-10158-0

Anna Belyaeva, Boris Maryshev

引用次数: 0

The Boundaries of the Existence of An Anomalous Convective Air Flow in a Square Cavity with a Moving Lid 方形动盖腔内异常对流气流存在的边界

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-02-12 DOI: 10.1007/s12217-025-10168-6

V.A. Sharifulin, P.S. Beloborodov, A.N. Sharifulin, T.P. Lyubimova

{"title":"The Boundaries of the Existence of An Anomalous Convective Air Flow in a Square Cavity with a Moving Lid","authors":"V.A. Sharifulin, P.S. Beloborodov, A.N. Sharifulin, T.P. Lyubimova","doi":"10.1007/s12217-025-10168-6","DOIUrl":"10.1007/s12217-025-10168-6","url":null,"abstract":"<div><p>In this paper, we study 2D stationary regimes of mixed convection in a square cavity with a moving lid. All walls of the cavity are considered as solid; the side walls are assumed to be perfectly thermally insulated, while the top and bottom walls are isothermal, the temperature of the bottom wall is higher. The impact of a smooth change in the velocity of the upper wall of on the convective stability of air within a square cavity is investigated both analytically, using low-mode approximation, and numerically, by the finite difference method. Calculations are performed for Grashof numbers up to values thirty times greater than the critical one. It have been shown that for each supercritical Grashof number there is a critical Reynolds number <span>(Re_c)</span> such that with a smooth change in the Reynolds number within the interval <span>(-Re_c< Re < Re_c)</span> the flow is continuously transformed, changing the structure from normal single-vortex to anomalous double-vortex and vice versa. If, with a change in the Reynolds number, the limits of the specified interval are exceeded, a hysteresis transition from the anomalous flow to the normal one is observed. These findings provide new insights into the complex interplay between thermal and inertial forces in convective flows. Understanding these flow structures and transitions could improve the knowledge of combustion processes.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"37 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396516","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

Inertial Wave Attractors in Librating Cylinders: Axisymmetric versus Nonaxisymmetric Ends 振动圆柱体中的惯性波吸引子：轴对称端与非轴对称端

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-02-12 DOI: 10.1007/s12217-025-10164-w

Stanislav Subbotin, Mariya Shiryaeva

{"title":"Inertial Wave Attractors in Librating Cylinders: Axisymmetric versus Nonaxisymmetric Ends","authors":"Stanislav Subbotin, Mariya Shiryaeva","doi":"10.1007/s12217-025-10164-w","DOIUrl":"10.1007/s12217-025-10164-w","url":null,"abstract":"<div><p>Inertial waves in a rotating confined fluid can focus on closed trajectories, known as wave attractors. These regimes are not eigenmodes and are related only to the frequency dependence of the wave vector. This paper presents an experimental investigation of the cylindrical cavity shape’s effect on the attractor’s spatial structure. We considered three different configurations: i) a circular cylinder with both conical axisymmetric ends; ii) a cylinder with one straight end and the other end inclined to the plane of the cross-section; iii) both ends of the cylinder are inclined parallel. The major observed difference is the azimuthal flow structure. In the axisymmetric case, the shape of the wave attractor is independent of the azimuthal coordinate, and the instantaneous vorticity field represents a system of nested rings in the cross-section. If one of the cavity ends has a constant slope, wave focusing appears in the meridional plane passing near the direction specified by the geometry. The three-dimensional law of wave reflection from inclined boundaries causes meridional trapping, which is important in real geo- and astrophysical systems with complex boundary topography.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"37 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396517","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