Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507397
Hongjie Wang, T. Saha, B. Riar, R. Zane
Constant dc current distribution has been preferred for long distance high reliability systems such as subsea ocean observation networks. The characteristics of dc current distribution and series resonant converters (SRCs) with constant input current bring new challenges and difficulties related to protection as well as operation of individual SRC modules and the entire system. This work proposes new protection techniques for SRCs operating with a constant input current and control strategies for SRC modules. Simulation and hardware results are provided for a system consisting of two 100 km submarine cables carrying a DC current of 1 A, and two series connected 250 kHz, 1 kW SRCs that regulates the output current to 0.33 A.
{"title":"Operational Study and Protection of a Series Resonant Converter with DC Current Input Applied in DC Current Distribution Systems","authors":"Hongjie Wang, T. Saha, B. Riar, R. Zane","doi":"10.23919/IPEC.2018.8507397","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507397","url":null,"abstract":"Constant dc current distribution has been preferred for long distance high reliability systems such as subsea ocean observation networks. The characteristics of dc current distribution and series resonant converters (SRCs) with constant input current bring new challenges and difficulties related to protection as well as operation of individual SRC modules and the entire system. This work proposes new protection techniques for SRCs operating with a constant input current and control strategies for SRC modules. Simulation and hardware results are provided for a system consisting of two 100 km submarine cables carrying a DC current of 1 A, and two series connected 250 kHz, 1 kW SRCs that regulates the output current to 0.33 A.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"38 10 1","pages":"4145-4150"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83701700","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 : 2018-05-20DOI: 10.23919/IPEC.2018.8507537
Hiroki Kowatari, Toshinori Kitamura, N. Hoshi
An interleaved boost chopper is used between the battery module and the traction inverter in electric vehicles including fuel cell vehicles and hybrid electric vehicles as one of the applications. However, this circuit requires the increased number of components such as inductors and switching devices in comparison with a general chopper. This paper proposes a new type of magnetically-loosely-coupled inductor for a four-phase interleaved boost chopper and compares the characteristics between the proposed and non-coupled inductors used in the chopper. As a result in the experiment, it is shown that the magnitude of the current ripple in the proposed inductor is 74~83 % smaller than that of the non-coupled inductor. In addition, the power conversion efficiency of the chopper using the proposed inductor is higher than that using the non-coupled inductor in a case where the inductor current flows continuously.
{"title":"Design and Evaluation of A Magnetically-loosely-coupled Inductor for A Four-phase Interleaved Boost Chopper","authors":"Hiroki Kowatari, Toshinori Kitamura, N. Hoshi","doi":"10.23919/IPEC.2018.8507537","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507537","url":null,"abstract":"An interleaved boost chopper is used between the battery module and the traction inverter in electric vehicles including fuel cell vehicles and hybrid electric vehicles as one of the applications. However, this circuit requires the increased number of components such as inductors and switching devices in comparison with a general chopper. This paper proposes a new type of magnetically-loosely-coupled inductor for a four-phase interleaved boost chopper and compares the characteristics between the proposed and non-coupled inductors used in the chopper. As a result in the experiment, it is shown that the magnitude of the current ripple in the proposed inductor is 74~83 % smaller than that of the non-coupled inductor. In addition, the power conversion efficiency of the chopper using the proposed inductor is higher than that using the non-coupled inductor in a case where the inductor current flows continuously.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"386 3","pages":"2660-2667"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91460849","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 : 2018-05-20DOI: 10.23919/IPEC.2018.8507499
Warayut Kampeerawar, T. Koseki, Fulin Zhou
This paper presents a design of urban railway operation based on an integrated design approach. The integrated approach aims to integrate the design train schedule, optimizing scenario for installing onboard energy storage, and considering effective power management. The proposed integrated design is formulated as an optimization problem with two alternative form of objective function solved by Genetic Algorithm. First objective function is minimizing energy supplied from substation and energy capacity of energy storage. Alternative form of objective function is minimizing surplus regenerative energy and energy capacity of energy storage. Both objective functions deal with energy-saving and cost-saving concern. To verify the performance of proposed method, the numerical case studies of urban railway system in Thailand and China will be numerically performed. The results shown that the proposed integrated design with the first objective function in off-peak hour can provide up to 16% of energy-saving performance in the case of Chinese Jinan Metro system and 27% of energy-saving performance in the case of Bangkok Metro System.
{"title":"Efficient Urban Railway Design integrating Train Scheduling, Onboard Energy Storage, and Traction Power Management","authors":"Warayut Kampeerawar, T. Koseki, Fulin Zhou","doi":"10.23919/IPEC.2018.8507499","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507499","url":null,"abstract":"This paper presents a design of urban railway operation based on an integrated design approach. The integrated approach aims to integrate the design train schedule, optimizing scenario for installing onboard energy storage, and considering effective power management. The proposed integrated design is formulated as an optimization problem with two alternative form of objective function solved by Genetic Algorithm. First objective function is minimizing energy supplied from substation and energy capacity of energy storage. Alternative form of objective function is minimizing surplus regenerative energy and energy capacity of energy storage. Both objective functions deal with energy-saving and cost-saving concern. To verify the performance of proposed method, the numerical case studies of urban railway system in Thailand and China will be numerically performed. The results shown that the proposed integrated design with the first objective function in off-peak hour can provide up to 16% of energy-saving performance in the case of Chinese Jinan Metro system and 27% of energy-saving performance in the case of Bangkok Metro System.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"32 1","pages":"3257-3264"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90159906","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 : 2018-05-20DOI: 10.23919/IPEC.2018.8507963
Oguz Kaan Hancioglu, M. Celik, U. Tumerdem
In this paper, we propose a 4 axis antenna which is capable of tracking satellites, through the precise real-time control of azimuth, cross-level, elevation and polarization angles. Due to the well-known gimbal lock problem in 2-3 axis antenna systems, our design has a redundant degree of freedom, and this redundancy is utilised to solve the issue of inverse kinematics around singularities. In the paper, we derive the kinematics of the 4 DOF redundant orientation mechanism and propose a method to avoid the gimbal lock issue. Also, utilising satellite position data (from TLE Database) and GPS localisation, we derive the necessary kinematics equations to position the antenna towards any visible satellite from any position on earth. Furthermore, we propose a PI-based cascade controller for tracking the satellites. To verify our analytical results we present experimental results on a 4 axis antenna test platform that we have built and compare our results with the feedback from a satellite in the form of guidance RF signals. The proposed system can find and track satellites with a 1-degree error without satellite signal feedback.
{"title":"Kinematics and Tracking Control of a Four Axis Antenna for Satcom on the Move","authors":"Oguz Kaan Hancioglu, M. Celik, U. Tumerdem","doi":"10.23919/IPEC.2018.8507963","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507963","url":null,"abstract":"In this paper, we propose a 4 axis antenna which is capable of tracking satellites, through the precise real-time control of azimuth, cross-level, elevation and polarization angles. Due to the well-known gimbal lock problem in 2-3 axis antenna systems, our design has a redundant degree of freedom, and this redundancy is utilised to solve the issue of inverse kinematics around singularities. In the paper, we derive the kinematics of the 4 DOF redundant orientation mechanism and propose a method to avoid the gimbal lock issue. Also, utilising satellite position data (from TLE Database) and GPS localisation, we derive the necessary kinematics equations to position the antenna towards any visible satellite from any position on earth. Furthermore, we propose a PI-based cascade controller for tracking the satellites. To verify our analytical results we present experimental results on a 4 axis antenna test platform that we have built and compare our results with the feedback from a satellite in the form of guidance RF signals. The proposed system can find and track satellites with a 1-degree error without satellite signal feedback.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"13 1","pages":"1680-1686"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90035862","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 : 2018-05-20DOI: 10.23919/IPEC.2018.8507449
T. Okuda, T. Hikihara
A high-speed gate driver based on GaN-HEMTs push-pull configuration has been proposed to drive a SiC power MOSFET at high switching frequency. In this study, we investigate the influences of parasitic inductances of the GaN HEMTs on the output voltage of the GaN-based gate driver. The parasitic inductances at the gate, source, and drain terminals of the GaN HEMTs are analyzed with SPICE simulation. It is found that the parasitic inductances at the gate and source terminals of the GaN HEMT have almost no influences on the output waveform of the gate driver, while the parasitic inductances at the drain terminal of the GaN HEMT produce large voltage oscillations of the output voltage.
{"title":"Enhancement of Driving Capability of Gate Driver Using GaN HEMTs for High-Speed Hard Switching of SiC Power MOSFETs","authors":"T. Okuda, T. Hikihara","doi":"10.23919/IPEC.2018.8507449","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507449","url":null,"abstract":"A high-speed gate driver based on GaN-HEMTs push-pull configuration has been proposed to drive a SiC power MOSFET at high switching frequency. In this study, we investigate the influences of parasitic inductances of the GaN HEMTs on the output voltage of the GaN-based gate driver. The parasitic inductances at the gate, source, and drain terminals of the GaN HEMTs are analyzed with SPICE simulation. It is found that the parasitic inductances at the gate and source terminals of the GaN HEMT have almost no influences on the output waveform of the gate driver, while the parasitic inductances at the drain terminal of the GaN HEMT produce large voltage oscillations of the output voltage.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"7 1","pages":"3654-3657"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72996354","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 : 2018-05-20DOI: 10.23919/IPEC.2018.8508009
S. D'arco, G. Guidi, J. Suul
This paper presents an implementation of a Virtual Synchronous Machine (VSM) based on a Modular Multilevel Converter (MMC). The control system relies on the internal simulation of an electromechanical swing equation, which emulates the inertia and damping effect of a synchronous machine and provides the frequency and phase angle needed for controlling the MMC to operate as a VSM. The ac-side control is based on cascaded voltage and current controllers in a synchronous reference frame defined by the virtual swing equation. The reference signals for the ac-side voltage control are generated from a reactive power control loop and a quasi-stationary virtual impedance which emulates the equivalent voltage drop over the stator windings of a synchronous machine. The control system also includes internal control loops for regulating the double frequency circulating currents of the MMC. The presented VSM implementation is tested in a laboratory environment using an MMC with 18 half-bridge sub-modules per arm. Experimental results demonstrate the operation of the VSM-controlled MMC when connected to an external ac grid and in islanded mode feeding a resistive load.
{"title":"Operation of a Modular Multilevel Converter Controlled as a Virtual Synchronous Machine","authors":"S. D'arco, G. Guidi, J. Suul","doi":"10.23919/IPEC.2018.8508009","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8508009","url":null,"abstract":"This paper presents an implementation of a Virtual Synchronous Machine (VSM) based on a Modular Multilevel Converter (MMC). The control system relies on the internal simulation of an electromechanical swing equation, which emulates the inertia and damping effect of a synchronous machine and provides the frequency and phase angle needed for controlling the MMC to operate as a VSM. The ac-side control is based on cascaded voltage and current controllers in a synchronous reference frame defined by the virtual swing equation. The reference signals for the ac-side voltage control are generated from a reactive power control loop and a quasi-stationary virtual impedance which emulates the equivalent voltage drop over the stator windings of a synchronous machine. The control system also includes internal control loops for regulating the double frequency circulating currents of the MMC. The presented VSM implementation is tested in a laboratory environment using an MMC with 18 half-bridge sub-modules per arm. Experimental results demonstrate the operation of the VSM-controlled MMC when connected to an external ac grid and in islanded mode feeding a resistive load.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"7 1","pages":"782-789"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79114616","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 : 2018-05-20DOI: 10.23919/IPEC.2018.8507791
B. L. Nguyen, Honnyong Cha, Tien-The Nguyen, Heung-Geun Kim
This paper explores a family of integrated multiport converters using three-switch which can provide single-input dual-output (SIDO) or dual-input single-output (DISO) with bidirectional power flow between any two ports. The concept can be extended to the n-switch converters to achieve more inputs and/or outputs. The proposed converters can be applied to interfacing sources, loads and storage elements having different voltage levels in applications such as dc nanogrids, electric vehicle, multiport power supplies, distributed generation systems. Various topological configurations of the integrated multiport n-switch converter are investigated. The operating principles and PWM control strategy of these converters are analyzed in detail. A universalized hardware prototype is built, experimental results are provided for verification.
{"title":"Family of Integrated Multi-Input Multi-Output DC-DC Power Converters","authors":"B. L. Nguyen, Honnyong Cha, Tien-The Nguyen, Heung-Geun Kim","doi":"10.23919/IPEC.2018.8507791","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507791","url":null,"abstract":"This paper explores a family of integrated multiport converters using three-switch which can provide single-input dual-output (SIDO) or dual-input single-output (DISO) with bidirectional power flow between any two ports. The concept can be extended to the n-switch converters to achieve more inputs and/or outputs. The proposed converters can be applied to interfacing sources, loads and storage elements having different voltage levels in applications such as dc nanogrids, electric vehicle, multiport power supplies, distributed generation systems. Various topological configurations of the integrated multiport n-switch converter are investigated. The operating principles and PWM control strategy of these converters are analyzed in detail. A universalized hardware prototype is built, experimental results are provided for verification.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"22 1","pages":"3134-3139"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85070334","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 : 2018-05-20DOI: 10.23919/IPEC.2018.8507488
Yoichiro Tabata, T. Mishima, T. Kido
A newly developed prototype of zero-voltage soft-switching (ZVS) high-frequency resonant for inductive power transfer (IPT) applications is presented in this paper. By adopting the burst mode pulse-density-modulation (PDM) scheme with resonant frequency tracking, the load power can be continuously regulated under the conditions of full-range soft-switching due to the undamped resonant currents through the coils, thereby the current surges which appears with the conventional PDM scheme can be eliminated effectively. The essential performances on the output power regulation and soft-switching operations are demonstrated in experiment using a class of 400 W-500 kHz prototype, and the validity is evaluated from the practical point of view.
{"title":"Frequency Tracking Burst-Mode PDM-controlled Class-D Zero Voltage Soft-Switching Resonant Converter for Inductive Power Transfer Applications","authors":"Yoichiro Tabata, T. Mishima, T. Kido","doi":"10.23919/IPEC.2018.8507488","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507488","url":null,"abstract":"A newly developed prototype of zero-voltage soft-switching (ZVS) high-frequency resonant for inductive power transfer (IPT) applications is presented in this paper. By adopting the burst mode pulse-density-modulation (PDM) scheme with resonant frequency tracking, the load power can be continuously regulated under the conditions of full-range soft-switching due to the undamped resonant currents through the coils, thereby the current surges which appears with the conventional PDM scheme can be eliminated effectively. The essential performances on the output power regulation and soft-switching operations are demonstrated in experiment using a class of 400 W-500 kHz prototype, and the validity is evaluated from the practical point of view.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"99 1","pages":"329-336"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80918178","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 : 2018-05-20DOI: 10.23919/IPEC.2018.8507647
Hoang Linh Bach, Tobias Maximilian Endres, Daniel Dirksen, Sigrid Zischler, C. F. Bayer, A. Schletz, M. März
This paper proposes a novel packaging concept for power electronic applications on basis of embedding power devices in ceramic circuit carriers, such as direct bonded copper (DBC) substrates. The semiconductor devices are assembled into laser structured DBC substrates and then sealed with a copper cover afterwards. This proposed method is an alternative solution to printed circuit board (PCB) embedding and low-temperature co-fired ceramic (LTCC) based multilayer technologies, which are insufficient for high power applications due to the limited temperature resistance and current carrying capacity. The feasibility study confirmed that the DBC embedding approach was successfully implemented by using laser technology combined with conductive gluing, solder, and silver sintering processes.
{"title":"Ceramic Embedding as Packaging Solution for Future Power Electronic Applications","authors":"Hoang Linh Bach, Tobias Maximilian Endres, Daniel Dirksen, Sigrid Zischler, C. F. Bayer, A. Schletz, M. März","doi":"10.23919/IPEC.2018.8507647","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507647","url":null,"abstract":"This paper proposes a novel packaging concept for power electronic applications on basis of embedding power devices in ceramic circuit carriers, such as direct bonded copper (DBC) substrates. The semiconductor devices are assembled into laser structured DBC substrates and then sealed with a copper cover afterwards. This proposed method is an alternative solution to printed circuit board (PCB) embedding and low-temperature co-fired ceramic (LTCC) based multilayer technologies, which are insufficient for high power applications due to the limited temperature resistance and current carrying capacity. The feasibility study confirmed that the DBC embedding approach was successfully implemented by using laser technology combined with conductive gluing, solder, and silver sintering processes.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"1 1","pages":"2410-2415"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86376974","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 : 2018-05-20DOI: 10.23919/IPEC.2018.8507676
Takehiro Jikumaru, G. Kuwata
This paper presents high speed motor for electric turbo blowers used in aircraft. In this application, equipment specifications such as light weight and high power density are strongly required. Therefore, it is necessary to increase the rotational speed of motors. We have developed 1.2kW/100krpm high speed motor. This paper also shows experimental results in the prototype.
{"title":"1.2kW 100,000rpm high speed motor for aircraft","authors":"Takehiro Jikumaru, G. Kuwata","doi":"10.23919/IPEC.2018.8507676","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507676","url":null,"abstract":"This paper presents high speed motor for electric turbo blowers used in aircraft. In this application, equipment specifications such as light weight and high power density are strongly required. Therefore, it is necessary to increase the rotational speed of motors. We have developed 1.2kW/100krpm high speed motor. This paper also shows experimental results in the prototype.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"1 1","pages":"177-180"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85064866","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}
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