Results 11 to 20 of about 25,073 (140)
全球能源互联网, 2018 在能源互联网时代，电池储能系统将被广泛用于各种工业、商业和居民场景，如可再生能源、电动汽车和不间断电源等。因此，电池储能系统的效率、可靠性和安全性等主要性能指标对储能系统成功商业化部署至关重要。然而，电池单体差异性与固定串并联的电池成组方式之间的不匹配关系所形成的大规模电池成组中的莱比锡最小因子效应，即木桶短板效应，极大损害了电池储能系统，尤其是大规模电池储能系统的循环寿命、安全性、可靠性和有效容量。近年来，归功于材料科学的发展，高频电力电子开关器件日益普及，成本也日益降低 ...
慈松
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Measurement of the A-Value of the Intersystem Transition in Al II at 2670 Å: Å Progress Report [PDF]
International Astronomical Union Colloquium, 1984 Ratios of intensities of spectral lines produced in the radiative decay of collisionally-excited levels of atomic ions are versatile indicators of electron density in astrophysical plasmas when one of the lines involves a metastable level (see the review by Feldman 1981 and references therein). Radiative transition probabilities (A-values) and electron
B. Carol Johnson, H.S. Kwong
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Optical spectrum of the post-AGB Star HD56126 in the wavelength interval 4010-8790 Å Å [PDF]
Astrophysical Bulletin, 2007 The optical spectrum of the post-AGB star HD56126 identified with the infrared source IRAS07134+1005 is studied in detail using high spectral resolution observations (R = 25000 and 60000) performed with the echelle spectrographs of the 6-m telescope. A total of about one and a half thousand absorptions of neutral atoms and ions, absorption bands of C2,
V. G. Klochkova +3 more
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Zhejiang Daxue xuebao. Lixue ban, 2006 分析了用图形方法计算逻辑函数的布尔差分与布尔偏导数存在的问题，在分析布尔差分与布尔偏导数的定义的基础上提出了计算布尔差分与布尔偏导数的表格方法，讨论了在1值最小项数较多时用计算布尔差分与布尔偏导数的表格方法.本文提出的表格方法与图形方法相比，具有不需画图，操作方便，易于计算机编程操作以及可用于多变量逻辑函数等优点.
LIANYi-qun(练益群) +1 more
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Zhejiang Daxue xuebao. Lixue ban, 2013 定义并研究了广义Kum指数分布(GKumE).给出GKumE分布的分布函数、密度函数以及风险函数，并讨论了其密度函数的展开以及一些数学性质.采用极大似然估计方法对GKumE分布参数进行估计.最后，利用一组实际寿命数据分析了GKumE分布的应用.
ZHOUWei(周唯), ZHANGGuo-fen(张帼奋)
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PLANTS, PEOPLE, PLANET, EarlyView.The jewel‐like flowers of Thismia are as rare as they are beautiful, often recorded from only a single site per species. Access to 15 populations of T. kobensis has enabled an uncommon, range‐wide assessment of morphology, genetics, and fungal partners. Our analyses showed that T.
Kenji Suetsugu +4 more
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野生动物学报, 2020 2014—2019年，对山西省褐马鸡（Crossoptilon mantchuricum）的分布进行调查研究，采用查阅文献、访问和野外调查相结合的方法，取得有效空间分布点位349处，结果表明：褐马鸡分布于吕梁山地的5市32县，面积约为9415 km2；洪洞、晋源区、忻府区、保德4个县为其新扩散的分布区；太岳山林区为新分布区，包括3市5县，面积约1642 km2。全省分布点位介于海拔582—2651 m。确定褐马鸡太岳山林区分布为原来历史分布的残存或延续。
杨向明
doaj
Wildlife Letters, EarlyView.In the winter of 2021/2022, a winter track survey revealed 43–46 tigers (without cubs) in 5.4 thousand km2 of suitable habitats in the Southwest Primorsky Province of Russia. In the same period, a network of camera traps registered 54 adult/subadult tigers here.
Yury Darman, Dina Matiukhina
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Wildlife Letters, EarlyView.Asiatic black bears in Russia face conservation threats such as habitat destruction and fragmentation, which exacerbate food shortages caused by crop failures. This study explores an innovative approach to rehabilitating bears that abandon hibernation in mid‐winter due to extreme exhaustion by providing supplemental food near their den sites.
Sergey A. Kolchin +2 more
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Wildlife Letters, EarlyView.Climate change drives shifts in suitable habitats for Eurasian lynx and its prey (hare, roe deer) in Mohe, Daxing'anling Mountains. Under RCP scenarios, moderate warming (RCP4.5) promotes substantial habitat expansion, while high‐emission conditions (RCP8.5) lead to strong expansion in the 2050s but slower gains and partial contraction by the 2070s ...
Binglian Liu +5 more
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