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Improved Quantile Convolutional and Recurrent Neural Networks for Electric Vehicle Battery Temperature Prediction

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Big Data Mining and Analytics 2024年第2期7卷 512-530页

作者： Andreas M.Billert Runyao Yu Stefan Erschen Michael frey Frank Gauterin Karlsruhe Institute of Technology(KIT) Institute of Vehicle System TechnologyKarlsruhe 76131Germanyand also with Bayerische Motoren Werke(BMW)AGMunich 80788Germany Technical University of Munich(TUM) Munich 80333Germany BMW AG Munich 80788Germany KIT Institute of Vehicle System TechnologyKarlsruhe 76131Germany

The battery thermal management of electric vehicles can be improved using neural networks predicting quantile sequences of the battery *** work extends a method for the development of Quantile Convolutional and Quantile Recurrent Neural Networks(namely Q*NN).Fleet data of 225629 drives are clustered and balanced,simulation data from 971 simulations are augmented before they are combined for training and *** Q*NN hyperparameters are optimized using an efficient Bayesian optimization,before the Q*NN models are compared with regression and quantile regression models for four *** analysis of point-forecast and quantile-related metrics shows the superior performance of the novel Q*NN *** median predictions of the best performing model achieve an average RMSE of 0.66°C and R^(2) of *** predicted 0.99 quantile covers 98.87%of the true values in the test *** conclusion,this work proposes an extended development and comparison of Q*NN models for accurate battery temperature prediction.

关键词： deep learning battery temperature convolutional and recurrent neural network quantile forecasting

Recycled graphite for more sustainable lithium-ion batteries

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Carbon Energy 2024年第5期6卷 15-24页

作者： Mayokun Olutogun Anna Vanderbruggen Christoph frey Martin Rudolph Dominic Bresser Stefano Passerini Helmholtz Institute Ulm(HIU) Ulm Germany Karlsruhe Institute of Technology(KIT) KarlsruheGermany Helmholtz Zentrum Dresden-Rossendorf(HZDR) Helmholtz Institute Freiberg for Resource Technology(HIF)FreibergGermany ProGraphite GmbH UntergriesbachGermany Chemistry Department Sapienza University of RomeRomeItaly

The demand for lithium-ion batteries(LIBs)is driven largely by their use in electric vehicles,which is projected to increase dramatically in the *** great success,however,urgently calls for the efficient recycling of LIBs at the end of their ***,we describe a froth flotation-based process to recycle graphite—the predominant active material for the negative electrode—from spent LIBs and investigate its reuse in newly assembled *** has been found that the structure and morphology of the recycled graphite are essentially unchanged compared to pristine commercial anode-grade graphite,and despite some minor impurities from the recycling process,the recycled graphite provides a remarkable reversible specific capacity of more than 350 mAh g^(−1).Even more importantly,newly assembled graphite‖NMC532 cells show excellent cycling stability with a capacity retention of 80%after 1000 cycles,that is,comparable to the performance of reference full cells comprising pristine commercial graphite.

关键词： anode graphite lithium-ion battery recycling sustainability

Cherishing the Memory of My Father——In Commemoration of 10th Anniversary of Death of richard frey

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Voice of Friendship 2014年第4期 49-52页

作者： richard frey

November 16,2014 marked the10th anniversary of the passing of my father richard *** that time,when sorting out books,writings and other materials left by him,I came to know more of family history and many parts of his life previously unfamiliar to *** has made me miss him all the *** father was born into a welloff middle-class Jewish family

关键词： father sorting Death anniversary marked Shanxi Tia

Cherishing the Memory of My Father——In Commemoration of 10th Anniversary of Death of richard frey

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Voice of Friendship 2015年第1期 46-48页

作者： richard frey Jr.

(Continued from the previous issue)My father,asa Chinesere volutionary of Austri and ecent,wasself-disciplined and low-key all his *** a 65-year revolutionary career in China—his second homeland—he witnessed the War of Resistance Against Japanese Aggression,War of Liberation,New China’s construction and development,the"cultural revolution"and reform and opening up;he underwent all kinds of hardships and suffered from *** unfairly treated and

关键词： revolution witnessed suffered father career Japane

Formation of tholeiitic basalts by lithosphere-asthenosphere interaction: example from Datong, North China

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Formation of tholeiitic basalts by lithosphere-asthenosphere...

Fast jet proper motion discovered in a blazar at z=4.72

2006年全国岩石学与地球动力学研讨会

作者： Frederick a.frey Mark D．Feigenson Department of Earth Atmospheric and Planetary Sciences MITCambridge MA 02139 Department of Geological Sciences Rutgers University 610 Taylor RoadPiscatawayNJ08854USA

The geochemistry of Quaternary volcanic rocks from Datong provides important constraints on the petrogenesis of continental alkali and tholeiitic basalts and lithospheric evolution in the western North China Craton. Alkali basalts in north Datong have trace element compositions similar to oceanic island basalts (OIB) . They show nearly homogenous isotopic compositions ( ε Nd=5.4-6.8 and 87Sr/86 Sr=0.7035-0.7037) that resemble the nearby Hannuoba Miocene basalts,

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Science Bulletin 2020年第7期65卷 525-530,M0003页

作者： Yingkang Zhang Tao An Sándor frey Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China Konkoly Observatory Research Centre for Astronomy and Earth SciencesKonkoly Thege Miklósút 15-17H-1121 BudapestHungary

High-resolution observations of high-redshift(z > 4) radio quasars offer a unique insight into jet kinematics at early cosmological epochs, as well as constraints on cosmological model *** to the general weakness of extremely distant objects and the apparently slow structural changes caused by cosmological time dilation, only a couple of high-redshift quasars(HRQs) have been studied with parsec-scale resolutions, and with limited number of observing epochs. Here we report on very long baseline interferometry(VLBI) observations of a high-redshift blazar J1430 + 4204(z=4.72) in the 8 GHz frequency band at five different epochs spanning 22 years. The source shows a compact core–jet structure with two jet components being identified within 3 milli-arcsecond(mas) scale. The long time span and multiple-epoch data allow for the kinematic studies of the jet components. That results in a jet proper motion of μ(J1) = 0.017 ± 0.002 mas a^-1 and μ(J2) = 0.156 ± 0.015 mas a^-1, respectively. For the fastest-moving outer jet component J2, the corresponding apparent transverse speed is (19.5 ± 1.9) *** inferred bulk jet Lorentz factor C=14.6 ± 3.8 and viewing angle θ=2.2°± 1.6°indicate highly relativistic beaming. The Lorentz factor and apparent proper motion are the highest measured to date among the z > 4 jetted radio sources, while the jet kinematics is still consistent with the cosmological interpretation of quasar redshifts.

关键词： Nuclei High-redshift Radio continuum Quasars Individual J1430+4204

A Report on Medical Conditions in Chin-Cha-Chi Border Region March 1945, Yan’an

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Voice of Friendship 2015年第3期 14-19页

作者： richard frey

Before finally leaving occupied territory I had paid two visits to the Border *** the summer of1940 I paid a short visit to East Hopei(Hebei)and helped to treat some *** the summer of 1941 I wished to go to work in the liberated area but couldn’t proceed as a Japanese offensive was in progress.I finally left the occupied area in December *** I left Peiping I went to P’inghsi(Pingxi)headquarters.

关键词： occupied Hebei Japanese finally leaving territory proceed courses medicines teach

My Admirable Comrade-in-Arms

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Voice of Friendship 2011年第1期 36-39页

作者： richard frey

People especially like to recall things of the past when they reach 60 or 70. The past events that one still remembers or have faded from one’s memory would come back clearly when mentioned by others. However,

关键词： things recall clearly mentioned asked village some

Some Thoughts on a Report Written 70 Years Ago

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Voice of Friendship 2015年第3期 13-14页

作者： richard frey

This is a report my father,*** frey,wrote to the China Aid Council in the United States in March 1945 to seek international assistance for the military and civilians of the border *** was written after he started to work in Yan’an after leaving the Shanxi-Chahar-Hebei antiJapanese front,a place he would never forget all his *** this report,he gave a personal account of the conditions

关键词： forget Shanxi military border Hebei father leaving assistance teach never