{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T16:42:37Z","timestamp":1778344957415,"version":"3.51.4"},"reference-count":187,"publisher":"Institute of Electrical and Electronics Engineers (IEEE)","issue":"8","license":[{"start":{"date-parts":[[2010,8,1]],"date-time":"2010-08-01T00:00:00Z","timestamp":1280620800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/ieeexplore.ieee.org\/Xplorehelp\/downloads\/license-information\/IEEE.html"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IEEE Trans. Ind. Electron."],"published-print":{"date-parts":[[2010,8]]},"DOI":"10.1109\/tie.2010.2043039","type":"journal-article","created":{"date-parts":[[2010,4,14]],"date-time":"2010-04-14T17:49:47Z","timestamp":1271267387000},"page":"2581-2596","source":"Crossref","is-referenced-by-count":1207,"title":["Medium-Voltage Multilevel Converters\u2014State of the Art, Challenges, and Requirements in Industrial Applications"],"prefix":"10.1109","volume":"57","author":[{"given":"H","family":"Abu-Rub","sequence":"first","affiliation":[]},{"given":"J","family":"Holtz","sequence":"additional","affiliation":[]},{"given":"J","family":"Rodriguez","sequence":"additional","affiliation":[]},{"family":"Ge Baoming","sequence":"additional","affiliation":[]}],"member":"263","reference":[{"key":"ref170","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2007.908164"},{"key":"ref172","doi-asserted-by":"publisher","DOI":"10.1109\/IAS.1999.805941"},{"key":"ref171","first-page":"1852","article-title":"comparison and mitigation of common mode voltage in power converter topologies","author":"wei","year":"2004","journal-title":"Conf Rec IEEE Ind Appl Soc Annu Meeting"},{"key":"ref174","doi-asserted-by":"crossref","first-page":"1386","DOI":"10.1109\/TIA.2003.816547","article-title":"reduced common-mode modulation strategies for cascaded multilevel inverters","volume":"39","author":"loh","year":"2003","journal-title":"IEEE Trans Ind Appl"},{"key":"ref173","doi-asserted-by":"publisher","DOI":"10.1109\/TPEL.2007.904195"},{"key":"ref176","doi-asserted-by":"publisher","DOI":"10.1109\/TPEL.2004.826514"},{"key":"ref175","doi-asserted-by":"publisher","DOI":"10.1109\/TPEL.2004.839830"},{"key":"ref178","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.892633"},{"key":"ref177","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.892633"},{"key":"ref168","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.1978.4503547"},{"key":"ref169","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.917063"},{"key":"ref39","doi-asserted-by":"publisher","DOI":"10.1109\/28.913728"},{"key":"ref38","first-page":"1","article-title":"State of the art and developments of medium voltage converters&#x2014;An overview","volume":"82","author":"bernet","year":"2006","journal-title":"Przeglad Elektrotech (Electr Rev )"},{"key":"ref33","year":"1999","journal-title":"Modular static power converter connected in a multi-level multi-phase multi-circuit configuration"},{"key":"ref32","year":"2000","journal-title":"Five level high power motor drive converter and control system"},{"key":"ref31","year":"2001","journal-title":"Three-level neutral point clamping type inverter circuit"},{"key":"ref30","year":"1997","journal-title":"Medium voltage PWM drive and method"},{"key":"ref37","doi-asserted-by":"publisher","DOI":"10.1109\/28.845059"},{"key":"ref36","year":"1999","journal-title":"Operating a power electronic circuit arrangement having multiple power converters"},{"key":"ref35","year":"2001","journal-title":"Three-point converter and method for its operation"},{"key":"ref34","year":"2003","journal-title":"Step switched PWM sine generator"},{"key":"ref181","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2003.821665"},{"key":"ref180","doi-asserted-by":"publisher","DOI":"10.1109\/IECON.2007.4459927"},{"key":"ref185","first-page":"3592","article-title":"Voltage gradient limitation of IGBTs by optimized gate-current profiles","author":"schmitt","year":"2008","journal-title":"Proc IEEE Power Electron Spec Conf"},{"key":"ref184","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2006.878314"},{"key":"ref183","doi-asserted-by":"publisher","DOI":"10.1063\/1.3106456"},{"key":"ref182","first-page":"337","article-title":"speed sensorless control of induction motors with inverter output filter","volume":"3","author":"guzinski","year":"2008","journal-title":"Electr Power Compon Syst"},{"key":"ref187","year":"0"},{"key":"ref186","year":"0"},{"key":"ref28","doi-asserted-by":"publisher","DOI":"10.1109\/PESC.2005.1581990"},{"key":"ref27","doi-asserted-by":"publisher","DOI":"10.1109\/PESC.2005.1581852"},{"key":"ref179","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.899927"},{"key":"ref29","doi-asserted-by":"publisher","DOI":"10.1109\/9780470546284"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.801052"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.1981.4503992"},{"key":"ref21","first-page":"164","article-title":"self-commutated three-phase inverters with staircase voltage waveforms for high-power applications at low switching frequency","volume":"6","author":"holtz","year":"1977","journal-title":"Siemens Res Dev Rep"},{"key":"ref24","doi-asserted-by":"publisher","DOI":"10.1109\/28.502161"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1109\/MIE.2008.923519"},{"key":"ref26","first-page":"861","article-title":"modeling and control of neutral point voltage balancing problem in three-level npc pwm inverters","author":"lin","year":"2005","journal-title":"Proc 36th IEEE PESC"},{"key":"ref101","doi-asserted-by":"publisher","DOI":"10.1109\/63.145137"},{"key":"ref25","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.928156"},{"key":"ref100","doi-asserted-by":"publisher","DOI":"10.1109\/63.506127"},{"key":"ref50","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.917159"},{"key":"ref51","doi-asserted-by":"publisher","DOI":"10.1109\/IAS.1994.377528"},{"key":"ref154","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.896274"},{"key":"ref153","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.908540"},{"key":"ref156","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2006.881989"},{"key":"ref155","doi-asserted-by":"publisher","DOI":"10.1109\/41.720325"},{"key":"ref150","doi-asserted-by":"publisher","DOI":"10.1109\/EPE.2007.4417316"},{"key":"ref152","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.2005132"},{"key":"ref151","doi-asserted-by":"publisher","DOI":"10.1109\/08IAS.2008.304"},{"key":"ref146","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.803213"},{"key":"ref147","doi-asserted-by":"publisher","DOI":"10.1109\/ICIT.2006.372338"},{"key":"ref148","article-title":"Switching behaviour of a generalized diode-clamped converter","author":"bartholomes","year":"2001","journal-title":"Proc EPE"},{"key":"ref149","first-page":"106","article-title":"4000 V&#x2013;300 A eight level IGBT inverter leg","author":"carrere","year":"1995","journal-title":"Proc EPE"},{"key":"ref59","doi-asserted-by":"publisher","DOI":"10.1109\/63.988678"},{"key":"ref58","year":"1997","journal-title":"Multilevel cascade voltage-source inverter with separate DC sources"},{"key":"ref57","doi-asserted-by":"publisher","DOI":"10.1109\/28.739012"},{"key":"ref56","doi-asserted-by":"publisher","DOI":"10.1109\/28.536875"},{"key":"ref55","doi-asserted-by":"publisher","DOI":"10.1109\/APEC.2002.989223"},{"key":"ref54","first-page":"1","article-title":"hybrid cascaded h-bridges multilevel motor drive control for electric vehicles","author":"du","year":"2006","journal-title":"Proc 37th IEEE Power Electron Spec Conf"},{"key":"ref53","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2009.2036283"},{"key":"ref52","doi-asserted-by":"publisher","DOI":"10.1109\/PESC.1992.254737"},{"key":"ref40","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.803189"},{"key":"ref167","doi-asserted-by":"publisher","DOI":"10.1109\/IAS.2002.1044070"},{"key":"ref166","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.917095"},{"key":"ref165","article-title":"large capacity high efficiency three-level gct inverter system for steel rolling mill drives","author":"koyama","year":"2001","journal-title":"Proc 9th EPE"},{"key":"ref164","doi-asserted-by":"publisher","DOI":"10.1109\/28.980377"},{"key":"ref163","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2004.841149"},{"key":"ref162","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2007.912735"},{"key":"ref161","doi-asserted-by":"publisher","DOI":"10.1109\/28.297922"},{"key":"ref160","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2007.895766"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1109\/63.892825"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1109\/TPEL.2004.839831"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.906997"},{"key":"ref5","author":"fazel","year":"2007","journal-title":"Investigation and comparison of multi-level converters for medium voltage applications"},{"key":"ref8","first-page":"1082","article-title":"Optimization of output filters for inverter fed drives","author":"phler","year":"2006","journal-title":"Proc IEEE Annu Conf Ind Electron Soc"},{"key":"ref159","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2006.889738"},{"key":"ref49","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2009.2017101"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1109\/60.790930"},{"key":"ref157","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.899854"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1109\/PESC.2000.878803"},{"key":"ref158","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2006.888802"},{"key":"ref46","doi-asserted-by":"publisher","DOI":"10.1109\/28.833778"},{"key":"ref45","doi-asserted-by":"publisher","DOI":"10.1109\/PESC.1995.474834"},{"key":"ref48","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2009.2016510"},{"key":"ref47","doi-asserted-by":"publisher","DOI":"10.1109\/TPEL.2007.909244"},{"key":"ref42","doi-asserted-by":"publisher","DOI":"10.1109\/28.567113"},{"key":"ref41","doi-asserted-by":"publisher","DOI":"10.1109\/IEMDC.2003.1210706"},{"key":"ref44","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.801231"},{"key":"ref43","doi-asserted-by":"publisher","DOI":"10.1109\/28.740843"},{"key":"ref127","doi-asserted-by":"publisher","DOI":"10.1109\/28.887217"},{"key":"ref126","first-page":"1","article-title":"neural-network-based space-vector pwm of a three level inverter covering overmodulation region and performance evaluation on induction motor drive","volume":"1","author":"wang","year":"2003","journal-title":"Proc IEEE Annu Conf Ind Electron Soc"},{"key":"ref125","first-page":"1124","article-title":"An improved space vector PWM control algorithm for multilevel inverters","volume":"3","author":"wei","year":"2004","journal-title":"Proc Int Power Electron Motion Control Conf"},{"key":"ref124","doi-asserted-by":"crossref","first-page":"545","DOI":"10.1109\/63.931078","article-title":"a new simplified space-vector pwm method for three level inverters","volume":"16","author":"seo","year":"2001","journal-title":"IEEE Trans Power Electron"},{"key":"ref73","doi-asserted-by":"publisher","DOI":"10.1109\/IECON.2002.1185392"},{"key":"ref72","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2002.804761"},{"key":"ref71","doi-asserted-by":"publisher","DOI":"10.1109\/63.838096"},{"key":"ref129","doi-asserted-by":"publisher","DOI":"10.1109\/28.464526"},{"key":"ref70","first-page":"323","article-title":"Neutral point clamped three-level general purpose inverter&#x2014;Features, benefits and applications","author":"krug","year":"2004","journal-title":"Proc 35th IEEE Annu Power Electron Spec Conf"},{"key":"ref128","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.1980.4503879"},{"key":"ref76","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.803205"},{"key":"ref77","doi-asserted-by":"crossref","first-page":"965","DOI":"10.1109\/IAS.1993.299015","article-title":"analysis of variation of neutral point potential in neutral-point-clamped voltage source pwm inverters","author":"ogasawara","year":"1993","journal-title":"Conf Rec IEEE Ind Appl Soc Annu Meeting"},{"key":"ref130","year":"0","journal-title":"ABB product information on IGCTs"},{"key":"ref74","doi-asserted-by":"publisher","DOI":"10.1109\/PESC.2004.1354747"},{"key":"ref75","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.922607"},{"key":"ref133","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.801237"},{"key":"ref134","doi-asserted-by":"publisher","DOI":"10.1109\/LPEL.2003.814644"},{"key":"ref78","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2005.858723"},{"key":"ref131","first-page":"867","article-title":"a 24-mva inverter using igct series connection for medium voltage applications","author":"nagel","year":"2001","journal-title":"Conf Rec IEEE Ind Appl Soc Annu Meeting"},{"key":"ref79","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.803207"},{"key":"ref132","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.907044"},{"key":"ref136","first-page":"214","article-title":"a new type of voltage fed inverter for the megawatt range","volume":"80","author":"holtz","year":"1982","journal-title":"Elektr Bahnen"},{"key":"ref135","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2005.863902"},{"key":"ref138","doi-asserted-by":"publisher","DOI":"10.1109\/PESS.2000.867569"},{"key":"ref137","year":"1983","journal-title":"Self-controlled inverter"},{"key":"ref60","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.918645"},{"key":"ref139","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.922601"},{"key":"ref62","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.1981.4503992"},{"key":"ref61","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.927245"},{"key":"ref63","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2006.882021"},{"key":"ref64","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2006.882025"},{"key":"ref65","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2007.895767"},{"key":"ref140","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2009.2029579"},{"key":"ref66","article-title":"a new range of medium voltage multilevel inverter drives with floating capacitor technology","author":"beinhold","year":"2001","journal-title":"Proc EPE"},{"key":"ref141","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.924015"},{"key":"ref67","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2009.2013846"},{"key":"ref142","doi-asserted-by":"publisher","DOI":"10.1109\/28.137436"},{"key":"ref68","doi-asserted-by":"publisher","DOI":"10.1109\/APEC.1998.653825"},{"key":"ref143","doi-asserted-by":"publisher","DOI":"10.1109\/41.585833"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2006.889893"},{"key":"ref69","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2007.900476"},{"key":"ref144","doi-asserted-by":"publisher","DOI":"10.1109\/EPE.2005.219669"},{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1002\/0471773719"},{"key":"ref145","doi-asserted-by":"publisher","DOI":"10.1109\/INDIN.2007.4384950"},{"key":"ref95","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.918461"},{"key":"ref109","doi-asserted-by":"publisher","DOI":"10.1109\/28.821811"},{"key":"ref94","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.928110"},{"key":"ref108","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.918466"},{"key":"ref93","doi-asserted-by":"publisher","DOI":"10.1109\/28.793371"},{"key":"ref107","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.1983.4504335"},{"key":"ref92","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2008.2002212"},{"key":"ref106","first-page":"1186","article-title":"Performance of medium voltage multi-level inverters","author":"hill","year":"1999","journal-title":"Conf Rec IEEE IAS Annu Meeting"},{"key":"ref91","doi-asserted-by":"publisher","DOI":"10.1109\/IAS.1998.730328"},{"key":"ref105","doi-asserted-by":"publisher","DOI":"10.1109\/28.793373"},{"key":"ref90","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.891994"},{"key":"ref104","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.801235"},{"key":"ref103","doi-asserted-by":"publisher","DOI":"10.1109\/5.301684"},{"key":"ref102","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.894767"},{"key":"ref111","doi-asserted-by":"publisher","DOI":"10.1109\/IAS.2006.256698"},{"key":"ref112","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.2007998"},{"key":"ref110","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.909728"},{"key":"ref98","doi-asserted-by":"publisher","DOI":"10.1109\/63.145136"},{"key":"ref99","doi-asserted-by":"publisher","DOI":"10.1109\/41.982262"},{"key":"ref96","doi-asserted-by":"publisher","DOI":"10.1109\/EPEPEMC.2008.4635513"},{"key":"ref97","doi-asserted-by":"publisher","DOI":"10.1109\/63.737592"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2005.844382"},{"key":"ref11","year":"1975","journal-title":"Electric power converter"},{"key":"ref12","year":"1980","journal-title":"Switching circuit"},{"key":"ref13","year":"1981","journal-title":"Bridge converter circuit"},{"key":"ref14","year":"2000","journal-title":"Four-quadrant ACAC drive and method"},{"key":"ref15","year":"2001","journal-title":"Modular multi-level adjustable supply with series connected active inputs"},{"key":"ref16","year":"2001","journal-title":"Modular multi-level adjustable supply with parallel connected active inputs"},{"key":"ref82","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.917068"},{"key":"ref118","first-page":"7","article-title":"configurations of high-power voltage source inverter drives","volume":"5","author":"stemmler","year":"1993","journal-title":"Power Electronics and Applications 1993 Fifth European Conference on"},{"key":"ref17","year":"1997","journal-title":"Electronic circuit for converting electrical energy and a power supply installation making use thereof"},{"key":"ref81","doi-asserted-by":"publisher","DOI":"10.1109\/TEC.2008.2001435"},{"key":"ref117","doi-asserted-by":"publisher","DOI":"10.1109\/41.605629"},{"key":"ref18","year":"1998","journal-title":"Electronic circuit for converting electrical energy"},{"key":"ref84","doi-asserted-by":"publisher","DOI":"10.1109\/TPEL.2005.869757"},{"key":"ref19","article-title":"operation and design of multilevel inverters","author":"corzine","year":"2003","journal-title":"Developed for the Office of Naval Research"},{"key":"ref83","doi-asserted-by":"publisher","DOI":"10.1109\/TPEL.2006.876864"},{"key":"ref119","first-page":"668","article-title":"Spannungsverh&#x00E4;ltnisse bei gekoppelten Drehstromwechselrichtern","volume":"97","author":"depenbrock","year":"1976","journal-title":"Elektrotech Zeitschrift etz-a 97"},{"key":"ref114","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2008.2008349"},{"key":"ref113","year":"0","journal-title":"EUPEC product information on IGBTs"},{"key":"ref80","doi-asserted-by":"publisher","DOI":"10.1109\/MIA.2004.1311163"},{"key":"ref116","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.803214"},{"key":"ref115","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-540-74171-8_46"},{"key":"ref89","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2006.881990"},{"key":"ref120","doi-asserted-by":"publisher","DOI":"10.1109\/41.720325"},{"key":"ref121","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.903939"},{"key":"ref122","doi-asserted-by":"publisher","DOI":"10.1049\/ip-epa:20040803"},{"key":"ref123","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2006.888801"},{"key":"ref85","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.907045"},{"key":"ref86","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2007.892255"},{"key":"ref87","doi-asserted-by":"publisher","DOI":"10.1109\/TIE.2002.803183"},{"key":"ref88","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2005.857473"}],"container-title":["IEEE Transactions on Industrial Electronics"],"original-title":[],"link":[{"URL":"http:\/\/xplorestaging.ieee.org\/ielx5\/41\/5508599\/05446354.pdf?arnumber=5446354","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,10,11]],"date-time":"2021-10-11T01:37:06Z","timestamp":1633916226000},"score":1,"resource":{"primary":{"URL":"http:\/\/ieeexplore.ieee.org\/document\/5446354\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,8]]},"references-count":187,"journal-issue":{"issue":"8"},"URL":"https:\/\/doi.org\/10.1109\/tie.2010.2043039","relation":{},"ISSN":["0278-0046"],"issn-type":[{"value":"0278-0046","type":"print"}],"subject":[],"published":{"date-parts":[[2010,8]]}}}