SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019最新文献

{"title":"The computational structure development for modeling hydrological shallow water processes on a graphics accelerator","authors":"A. Nikitina, A. Filina, Y. Belova, T. Lyashchenko, V. Litvinov, L. Kravchenko, A. Zabalueva","doi":"10.1063/1.5138452","DOIUrl":"https://doi.org/10.1063/1.5138452","url":null,"abstract":"The paper covers the development and research epy computational structure for mathematical modelling of hydrobiological processes in shallow waters – Azov Sea and Gelendzhik Bay, based on the modern information technologies and computational methods to improve the accuracy of predictive modelling the ecological situations in waters during the summer. The models take into account following: the water flow movement; microturbulent diffusion; gravitational settling of pollutants; plankton populations nonlinear interaction; the salinity impact, temperature. The scheme with weights was proposed for discretization of the developed model, that allowed significantly reduce the error and the computational time. Practical significance of the work is that the proposed model was software implemented; the limits and prospects of its use were defined. The experimental software was designed on the basis of a graphics accelerator for mathematical modelling of possible development scenarios of the shallow waters ecosystems, taking into account the environment influence. Parallel implementation was performed using the decomposition methods for computationally labours diffusion-convection problems taking into account the CUDA architecture characteristics.The paper covers the development and research epy computational structure for mathematical modelling of hydrobiological processes in shallow waters – Azov Sea and Gelendzhik Bay, based on the modern information technologies and computational methods to improve the accuracy of predictive modelling the ecological situations in waters during the summer. The models take into account following: the water flow movement; microturbulent diffusion; gravitational settling of pollutants; plankton populations nonlinear interaction; the salinity impact, temperature. The scheme with weights was proposed for discretization of the developed model, that allowed significantly reduce the error and the computational time. Practical significance of the work is that the proposed model was software implemented; the limits and prospects of its use were defined. The experimental software was designed on the basis of a graphics accelerator for mathematical modelling of possible development scenarios of the shallow waters ecosystem...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125860824","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}

{"title":"Concept and implementation of the laboratory test bench for simulating the case of leak detection with the use of leak-noise correlator","authors":"V. Faerman, A. Tsavnin","doi":"10.1063/1.5140106","DOIUrl":"https://doi.org/10.1063/1.5140106","url":null,"abstract":"Concept of laboratory rig for pipe leaks detections task solution via acoustic control is proposed. Hardware and software implementation stages are described. The laboratory bench consists of two subsystems. The first subsystem provides audio signal real-time playback to simulate the propagated leak noise at two terminal points of pipe line segment. The second subsystem is leak-noise correlator itself. Using piezoelectric accelerometers as sensors it receives acoustic signal and then performs analog-to-digital conversion with further software digital processing. Regarding the hardware implementation, PC is utilized for software signal generation, in particular, Simulink model is used. Raspberry Pi-based device is used for digital signal processing. Since leak location problem can be solved with different digital processing algorithms such as correlation or specter analysis, the presented laboratory rig can be applied for academic purposes. For instance, it can be implemented within courses such as “Digital Signal Processing” and “Applied Math”. In addition, the presented solution is also applicable for scientific research associated with delay time estimation.Concept of laboratory rig for pipe leaks detections task solution via acoustic control is proposed. Hardware and software implementation stages are described. The laboratory bench consists of two subsystems. The first subsystem provides audio signal real-time playback to simulate the propagated leak noise at two terminal points of pipe line segment. The second subsystem is leak-noise correlator itself. Using piezoelectric accelerometers as sensors it receives acoustic signal and then performs analog-to-digital conversion with further software digital processing. Regarding the hardware implementation, PC is utilized for software signal generation, in particular, Simulink model is used. Raspberry Pi-based device is used for digital signal processing. Since leak location problem can be solved with different digital processing algorithms such as correlation or specter analysis, the presented laboratory rig can be applied for academic purposes. For instance, it can be implemented within courses such as “Digita...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125913385","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}

{"title":"Optimal synthesis, design and operation of smart microgrids serving a cluster of buildings in a campus with centralized and decentralized hybrid renewable energy systems","authors":"D. Testi, Luca Urbanucci, Chiara Giola, D. Aloini, Nunzia Squicciarini, M. Tucci, Marco Raugi","doi":"10.1063/1.5138881","DOIUrl":"https://doi.org/10.1063/1.5138881","url":null,"abstract":"Optimal design and operation of energy systems serving clusters of buildings interconnected by energy microgrids is a scientific challenge for the engineering community, with many interdisciplinary aspects involved. In the paper, the optimization problem is tackled in terms of simulation-based design of the energy system for a typical year of operation. The methodology has been applied to a Campus in Trieste, Italy, involving locally available renewable energy sources, a centralized cogeneration system, and decentralized heat pumps. The nominal powers of cogeneration plant, photovoltaic modules and wind turbine have been optimized by a population-based evolutionary optimization algorithm, previously proposed by the authors. We have also found the optimal scheduling of energy generators by means of a greedy approach. The solution with maximum Annualized Cost Saving Percentage is discussed, highlighting how a configuration involving decentralized heat pumps is cost effective, integrates more renewable energy sources, and reduces environmental impact and grid exchange compared to a benchmark solution, with fully centralized generators.","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127031250","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}

{"title":"Enzymatic fuel cell technology for energy production from bio-sources","authors":"L. Barelli, G. Bidini, Eleonora Calzoni, A. Cesaretti, A. Michele, Carla Emiliani, L. Gammaitoni, Elena Sisani","doi":"10.1063/1.5138747","DOIUrl":"https://doi.org/10.1063/1.5138747","url":null,"abstract":"Enzymatic biofuel cells (EFCs) are bioelectronic devices that use oxidoreductase enzymes as electrocatalysts for the oxidation of an organic substrate and/or the reduction of oxygen or peroxide, finalized to direct energy conversion to electricity. Enzymes provide excellent specificity towards the substrates, avoiding, in some cases, the need of membranes and noble metals, thus realizing very compact systems suitable for miniaturization. Other advantages include high catalytic activity with low overvoltage for substrate conversion, mild operating conditions, like ambient temperature and near-neutral pH and low cost. EFCs can be utilized in a variety of applications, which need low power input and the biocompatibility of the device, including implantable or wearable biofuel cells, self-powered biosensors and, generally, portable battery-free power solutions. For enzymatic biofuel cell design, an effective immobilization of enzymes on the electrodes is an important challenge to obtain direct electron transfer without mediators, resulting in higher performance and improved long term stability. The use of conductive nanomaterials and different types of polymers as electrodes allow to achieve high specific surface, increasing the number of wired enzymes per volume unit, and facilitate the electron transfer between enzyme active site and electrode. The present paper focuses on glucose fuel cells (GFCs), a subtype of conventional EFCs able to oxidize glucose provided by a lot of metabolic processes. The designs of bioanodes are focused on the use of glucose oxidase (GOx), while biocathodes are based on laccase. The realization of a preliminary prototype on lab scale is presented based on glucose oxidase immobilized on conductive polymer, which already exhibited stability over time (several months) once immobilized through innovative techniques. Since glucose is an essential, relatively abundant and almost unlimited source of energy in living organisms, possible applications are the development of implantable GFCs as well as the exploitation of agro-industrial wastes.","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127279804","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}

{"title":"The use of the Matlab&Simulink environment to solve problems of synthesis of automatic control systems in the joint laboratory of the KNRTU and “Yokogawa” company","authors":"M. Vasilyeva, A. Ryzhova, M. Perukhin","doi":"10.1063/1.5140137","DOIUrl":"https://doi.org/10.1063/1.5140137","url":null,"abstract":"At the Department of «Automation and process control» of the Kazan National Research Technological University (the KNRTU) a laboratory stand for the study of heat metering devices and automated energy saving systems was developed and put into operation for the preparation of masters of Science specializing in 15.04.04 «The automation of technological processes and production». The automated system of measuring information processing and control of the laboratory bench is implemented on the basis of the controller of the distributed system Centum VP of the Yokogawa Company. The interactive environment MatlabS synthesis of the controller using logarithmic frequency characteristics; synthesis of the controller by spectral method; optimization of control systems with PID controller and others. On the basis of the work performed, a textbook for course and diploma design was issued, including a large number of examples in the Simulink and Matlab environment.At the Department of «Automation and process control» of the Kazan National Research Technological University (the KNRTU) a laboratory stand for the study of heat metering devices and automated energy saving systems was developed and put into operation for the preparation of masters of Science specializing in 15.04.04 «The automation of technological processes and production». The automated system of measuring information processing and control of the laboratory bench is implemented on the basis of the controller of the distributed system Centum VP of the Yokogawa Company. The interactive environment MatlabS synthesis of the controller using logarithmic frequency characteristics; synthesis of the controller by spectral method; optimi...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122648445","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}

{"title":"On the influence of hydronic distribution loop on energy performance and indoor thermal comfort for air-to-water heat pump systems in residential buildings","authors":"M. Dongellini, A. Piazzi, G. Morini","doi":"10.1063/1.5138801","DOIUrl":"https://doi.org/10.1063/1.5138801","url":null,"abstract":"Air-to-water heat pumps (AWHPs) are an efficient technology to provide thermal energy for space heating and domestic hot water production in residential buildings, which cover about 30% of the Italian overall energy consumption. Despite of a series of benefits, such as low investment costs and large availability of the external source (ambient air), air-source heat pumps are affected by several drawbacks, the most important of which is the frosting phenomena. Nowadays, the most widespread defrosting technique is reverse-cycle defrost (RCD): the indoor heat exchanger of the AWHP operates as an evaporator, extracting thermal energy from the heated space to melt the ice layer. For this reason, during the defrosting process no heating is provided and the indoor air temperature may significantly drop; therefore, the thermal comfort of building occupants is negatively affected. Very few studies demonstrating that the correct design of the hydronic distribution loop can mitigate the adverse effect of defrosting cycles on indoor thermal comfort can be found in literature; hence, the aim of this paper is to optimize position and size of a thermal storage tank inserted within the hydronic loop in order to minimize the impact of defrosting cycles on the heating system performance. This work analyses the performance of an inverter-driven AWHP coupled to a residential building located in Bologna (Northern Italy) by means of a simulation model developed with TRNSYS; furthermore, the heat pump dynamic model takes into account the reverse cycle operating mode during defrosting cycles and the energy losses linked to on-off cycling. Results show that defrosting cycles have a negative, significant impact on the seasonal performance factor of the system, which is reduced up to 10% with respect to an ideal case where frosting phenomena is not considered. Furthermore, defrosting transients cause a relevant decrease of the indoor air temperature (about 1°C), linked to the worsening of indoor thermal comfort conditions, in systems characterized by low thermal inertia (water volume lower than 5 l/kW); on the contrary, the influence of defrosting cycles on indoor conditions can be considered as negligible for a water content in the distribution loop larger than 10 l/kW, especially if the thermal storage is placed on the supply loop (i.e. between the heat pump and the terminal units).Air-to-water heat pumps (AWHPs) are an efficient technology to provide thermal energy for space heating and domestic hot water production in residential buildings, which cover about 30% of the Italian overall energy consumption. Despite of a series of benefits, such as low investment costs and large availability of the external source (ambient air), air-source heat pumps are affected by several drawbacks, the most important of which is the frosting phenomena. Nowadays, the most widespread defrosting technique is reverse-cycle defrost (RCD): the indoor heat exchanger of the AWHP operates as an ","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125049623","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}

{"title":"Dynamic behaviour of a hybrid steam generator equipped with a gate valve","authors":"F. Ruggiero, M. Lucchi, M. Lorenzini, P. Valdiserri, Daniele Fattini","doi":"10.1063/1.5138867","DOIUrl":"https://doi.org/10.1063/1.5138867","url":null,"abstract":"Cogeneration is an often viable and efficient solution to cover combined demands of electric and thermal power, especially when the demand of the latter remains fairly constant over time. The effic...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130367976","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}

{"title":"Indirect measurement of turbocharger instantaneous velocity for multi-cylinder combustion diagnosis","authors":"O. Chiavola, M. Domenici, F. Palmieri","doi":"10.1063/1.5138777","DOIUrl":"https://doi.org/10.1063/1.5138777","url":null,"abstract":"Combustion monitoring and controlling techniques for reciprocating internal combustion engines have got in the past and continue to get great attention from researchers due to their role in complying with more severe regulations in terms of fuel consumption and emission reduction. The employment of vibration signals is one of the approaches widely used to assess the condition of machines and detect faults. Methods based on vibration analysis in time and frequency domains have been proposed to indirectly sense the combustion and provide a feedback signal to optimize the engine management. Accelerometer signals from engine block have been used for combustion progress evaluation; vibration signals of turbochargers have been employed for turbocharger speed estimation aimed at obtaining an indirect monitoring of the engine operating conditions in terms of speed, load and injection settings. The purpose of this paper is to present a study on the employment of the turbocharger vibration signal to get information on its instantaneous velocity to be used in combustion control algorithms. Data have been acquired during experimental tests on a small displacement turbocharged two-cylinder diesel engine. An accelerometer was mounted on the compressor housing and tests have been performed at different values of engine speed and torque. Results are presented and discussed.Combustion monitoring and controlling techniques for reciprocating internal combustion engines have got in the past and continue to get great attention from researchers due to their role in complying with more severe regulations in terms of fuel consumption and emission reduction. The employment of vibration signals is one of the approaches widely used to assess the condition of machines and detect faults. Methods based on vibration analysis in time and frequency domains have been proposed to indirectly sense the combustion and provide a feedback signal to optimize the engine management. Accelerometer signals from engine block have been used for combustion progress evaluation; vibration signals of turbochargers have been employed for turbocharger speed estimation aimed at obtaining an indirect monitoring of the engine operating conditions in terms of speed, load and injection settings. The purpose of this paper is to present a study on the employment of the turbocharger vibration signal to get information...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130530196","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}

{"title":"Complex of programs for calculating the movement of heated aerosols from mobile microenergy plant","authors":"A. Chistyakov, E. Protsenko, A. Atayan","doi":"10.1063/1.5138467","DOIUrl":"https://doi.org/10.1063/1.5138467","url":null,"abstract":"The work considered a software package that takes into account such physical processes as: transport of pollutants and heat; change in turbulent exchange coefficient; the transition of water from liquid to gaseous state; precipitation of a substance; temperature change due to condensation and evaporation of aerosols; turbulent mixing of multicomponent air; heat transfer between liquid and gaseous states; the presence of distributed sources of matter and temperature; the power of Archimedes; tangential stress at the interfaces; variable density, depending on: concentration of pollutants, temperature, pressure; compressibility of the medium due to: changes in temperature, evaporation and condensation of the liquid, changes in pressure, the presence of sources. It is proposed to expand the applicability of this software package through the use of schemes operating at large Peclet grid numbers and apply an improved software package to calculate the distribution of emissions from mobile microenergy complex.The work considered a software package that takes into account such physical processes as: transport of pollutants and heat; change in turbulent exchange coefficient; the transition of water from liquid to gaseous state; precipitation of a substance; temperature change due to condensation and evaporation of aerosols; turbulent mixing of multicomponent air; heat transfer between liquid and gaseous states; the presence of distributed sources of matter and temperature; the power of Archimedes; tangential stress at the interfaces; variable density, depending on: concentration of pollutants, temperature, pressure; compressibility of the medium due to: changes in temperature, evaporation and condensation of the liquid, changes in pressure, the presence of sources. It is proposed to expand the applicability of this software package through the use of schemes operating at large Peclet grid numbers and apply an improved software package to calculate the distribution of emissions from mobile microenergy complex.","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"43 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120934223","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}

{"title":"A quasi 3D approach for the modelling of an automotive turbocharger’s compressor","authors":"G. Montenegro, Matteo Tamborski, A. Marinoni, A. D. Torre, A. Onorati, S. Marelli","doi":"10.1063/1.5138846","DOIUrl":"https://doi.org/10.1063/1.5138846","url":null,"abstract":"In this work the 3DCell method has been extended to the thermo-fluid dynamic simulation of an automotive turbocharger’s compressor. The 3DCell, an approach continuously developed by the authors at Politecnico di Milano, is based on a pseudo-staggered leapfrog method that allows to decompose a generic 3D problem in a set of 1D scalar equation arbitrarily oriented in space. The system of equations has been solved referring to a relative rotating framework for the moving components, whereas to an absolute reference elsewhere. The domain has been discretized on a basis of a polar coordinate system, identifying five macro sub-domains, namely the inlet pipe, impeller, vaneless diffuser, volute, outlet pipe, each treated numerically in a specific way. The diffuser’s momentum in the tangential direction has been modelled resorting to the conservation of the angular momentum, while the rotor channels are modelled as rotating pipes that exchange work and momentum with the blades as they experience a relative source...","PeriodicalId":182421,"journal":{"name":"SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121464328","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}