Results 71 to 80 of about 4,401 (193)
BMS for Power Lithium-ion Batteries Based on Variable Rate Equalization Charging Technology [PDF]
, 2015 能源短缺和环境污染是当今世界所面临的两大难题。如今，节能和环保已成为世界汽车工业发展的主题，因此开展新能源汽车的研究刻不容缓。电动汽车以具有零排放，低噪音等优点，越来越受到世界各国的关注。电动汽车的动力源于动力电池组，电池组的整体性能和使用寿命关系到电动汽车的性能，作为电动汽车发展的关键技术之一的电池管理系统(BMS)，是电动汽车产业的研究重点。 动力电池组的不一致性会导致电池组性能大幅下降，因此，通过研究降低动力电池组不一致性的方法来提高电池组使用效率和使用寿命具有重要意义 ...
梁恺
core
, 1996 自 Armstrong[1,2] 提出地壳再循环模式以来, 越来越多的地质和地球化学证据表明组成现今大陆的绝大部分岩石是在地球早期形成的。Condie 根据结晶岩U -Pb 年龄数据并结合钦同位素提出了地壳形成的两个主要生长期为2, 6 – 2.8Ga 和1.7 – 1.9Ga [3]。后来在总结元古宙构造演化时, Condie 注意到在北美大陆缺失2.0 – 2.4Ga 这段期间的岩石年龄记录, 因而提出了有可能存在2.0 - 2.4Ga 的地壳生长间断期(crustal generation gap)
Sun, M, Wu, J, Zhang, L
core
Shuitu Baochi Xuebao, 2020 以矿区周边Cd—Pb复合污染的农田土壤为供试材料，设置0，2.5%和5%（w/w）3个生物炭添加处理，通过盆栽试验探讨生物炭对再生稻吸收土壤中Cd和Pb的影响。结果表明，生物炭施加提高土壤pH和有机质含量，使Cd和Pb从移动性较强的弱酸提取态转化为较稳定的可还原态，且土壤CaCl2提取的有效态Cd和Pb含量分别降低33.23%~53.23%和66.52%~91.45%。同时，生物炭抑制Cd在头季和再生季水稻叶到糙米中的迁移，降低Pb从茎到叶和糙米的迁移，从而减少Cd和Pb在糙米中的累积；在5 ...
李荭荭 +5 more
doaj
"The Effectiveness of Economic Controls: The Early Postwar Years in Japan --- Part II: Political Economy of Economic Controls"(in Japanese) [PDF]
Despite the many economic studies documenting the problems governments face in trying to control or guide economic growth, the literature on postwar Japan posits an exception: during the first three years after World War II, the Japanese government ...
J. Mark Ramseyer, Yoshiro Miwa
core
Constraints on timing of the early-paleoproterozoic magmatism and crustal evolution of the Oulongbuluke microcontinent: U-Pb and Lu-Hf isotope systematics of zircons from Mohe granitic pluton [PDF]
, 2007 The Olongbuluke micro-continent is composed of a two-fold basement with cover strata. The lower basement is the medium-to high-grade Delingha complex (DC) and the Dakendaban Group, the upper is the low-grade Wandonggou Group.
Chen, N +6 more
core
Epidemiological research progress in the effects of metal exposure on kidney. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2023 Yi X, Shen M, Yang F.
europepmc +1 more source
湖北省罗田凤凰关混合岩浅色体的类型及其锆石U-Pb年龄 [PDF]
, 1997 Based on the principle of refolding transecting and overprinting, and eliminating the refolding pseudomorph resulting from the effect of viscous folds, 8-generation leucosomes have been distinguished in the Fenghuangguan migmatites in Luotian, Hubei ...
Chang, XY, Deng, SX, Sun, M, Wang, JH
core
Slackline no CIEJA: não é para melhorar o equilíbrio, é porque é...
Conexões, 2018 Contrariando a visão hegemônica que concebe a Educação Física na Educação de Jovens e Adultos como experiência formativa irrelevante ou destinada simplesmente a exercitar e relaxar os corpos com vistas a compensar os esforços laborais da população trabalhadora, relatamos uma experiência pedagógica realizada num Centro Integrado de Educação de Jovens e ...
Jacqueline Cristina Jesus Martins +1 more
openaire +2 more sources
Synthesis and Modification of LiNixCoyMnzO2 Cathode Material for Li-ion Batteries [PDF]
, 2015 LiNixCoyMnzO2正极材料因兼具镍酸锂、钴酸锂和锰酸锂的优点，具有容量较高、热稳定好、价格较低和环境污染小等优点，被认为是最有可能取代钴酸锂的新型正极材料之一。如何让LiNixCoyMnzO2正极材料在拥有更高能量密度的同时拥有更好的电化学性能和热稳定性是目前的研究热点之一。 本论文选取低Co含量的LiNi1/3Co1/3Mn1/3O2和LiNi0.5Co0.2Mn0.3O2为主要研究对象。采用共沉淀结合高温烧结法，优化一系列实验条件合成类球形LiNi1/3Co1/3Mn1/3O2正极材料 ...
蔡济钧
core