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Yan Yaqiang 《Southeast Asian Bulletin of Mathematics》2002,25(4):769-782
We introduce some practical calculation of the weakly convergent sequence coefficients of Orlicz sequence spaces equipped with Luxemburg norm and Orlicz norm. For the N-function (u) of which the index function is monotonuous, the exact value WCS(l()) of Orlicz sequence space l() with Luxemburg norm is available, i.e. WCS(l()) =
or
WCS(l) of l with Orlicz norm has the exact value
or estimation
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Dr. Liwei Dong Dr. Shijie Zhong Dr. Botao Yuan Dr. Yaqiang Li Dr. Jipeng Liu Dr. Yuanpeng Ji Dr. Dongjiang Chen Dr. Yuanpeng Liu Prof. Chunhui Yang Prof. Jiecai Han Prof. Weidong He 《Angewandte Chemie (International ed. in English)》2023,62(23):e202301073
Without excess Li, anode-free Li-metal batteries (AFLMBs) have been proposed as the most likely solution to realizing highly-safe and cost-effective Li-metal batteries. Nevertheless, short cyclic life puzzles conventional AFLMBs due to anodic dead Li accumulation with a local current concentration induced by irreversible electrolyte depletion, insufficient active Li reservoir and slow Li+ transfer at the solid electrolyte interphase (SEI). Herein, SrI2 is introduced into carbon paper (CP) current collector to effectively suppress dead Li through synergistic mechanisms including reversible I−/I3− redox reaction to reactivate dead Li, dielectric SEI surface with SrF2 and LiF to prevent electrolyte decomposition and highly ionic conductive (3.488 mS cm−1) inner layer of SEI with abundant LiI to enable efficient Li+ transfer inside. With the SrI2-modified current collector, the NCM532/CP cell delivers unprecedented cyclic performances with a capacity of 129.2 mAh g−1 after 200 cycles. 相似文献
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采用量子化学QCISD(T)/6-311++G(d,p)//B3LYP/6-311+G(d,p)方法研究了H2FCS单分子分解反应的微观动力学性质, 构建了反应势能剖面. 利用经典过渡态理论(TST)与变分过渡态理论(CVT)并结合小曲率隧道效应模型(SCT), 分别计算了在200~3000 K温度范围内的速率常数kTST、kCVT和kCVT/SCT. 计算结果表明, H2FCS可经过不同的反应通道生成10种小分子产物, 脱H反应和HF消去反应为标题反应的主反应通道, 其中HF消去反应产物HCS可由两条反应通道生成. 在200~3000 K温度区间内得到三条反应通道的表观反应速率常数三参数表达式分别为 , 和 . 速率常数计算结果显示, 量子力学隧道效应在低温区间对反应速率常数的影响显著, 而变分效应在计算温度范围内可以忽略. 相似文献
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A study on the complexity of a business cycle model with great excitements in non-resonant condition
Based on the researches of Szydlowski and Krawiec, we studied the inherent complexity of a chaotic business cycle with great excitements in non-resonant condition. First, we got the first-order and second-order approximate solutions of the system by using multiple scale method. Then deduced the formulation reflecting the complex relations between vibration, phase, bifurcation parameter μ and excite frequency Ω of first-order solution. As the great excitement F varied, the global changes of the system solutions were analyzed. We also explored the different paths leading the systems with different parameter combinations into catastrophe region, fuzzy region or chaos region. Finally, we discussed the evolution trends of business cycle models under the above-mentioned conditions. Hence, this paper has some theoretical and practical significance. 相似文献
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混合驱动水下滑翔机水动力参数辨识 总被引:2,自引:1,他引:1
与传统水下滑翔机相比,混合驱动水下滑翔机可以分别利用头部的浮力驱动单元和机身尾部的螺旋桨推进单元进行驱动从而实现不同形式的运动,具备低功耗、长航程、良好机动性等特点,具有广泛的应用前景. 准确的动力学模型以及精确的水动力参数是实现混合驱动水下滑翔机控制系统设计以及精确导航的基础. 在混合驱动水下滑翔机动力学模型已知的前提下获得准确的水动力参数是本文主要研究的问题. 本文以天津大学研制的混合驱动水下滑翔机“海燕” 作为研究对象,提出一种在有限航行参数条件下,基于大数据统计分析的计算流体力学(computational fluid dynamics, CFD) 和参数辨识相结合来获取混合驱动水下滑翔机的水动力参数的方法. 即首先建立滑翔机的动力学模型,推导出稳态数据与所求水动力参数的关系;然后采用CFD 的方法得到其升力系数,根据大量稳态纯滑翔实验数据,结合大数据统计分析,辨识出其剩余水动力参数;最后,根据混合驱动模式下的实验数据辨识出与螺旋桨相关的参数,从而得到其整套的水动力参数. 该方法不仅结合了CFD 方法具有获取复杂外形结构航行水动力的特点,而且可以有效利用大量现场实验数据,因而能够更加准确地辨识其实际运动. 通过运动仿真与试验对比,验证了该辨识方法的正确性和有效性,对滑翔机的研究具有指导意义. 相似文献
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Dr. Peng Gao Dr. Zihao Cui Dr. Xiaolei Liu Dr. Yaqiang Wu Dr. Qianqian Zhang Prof. Zeyan Wang Prof. Zhaoke Zheng Prof. Hefeng Cheng Prof. Yuanyuan Liu Prof. Qing Li Prof. Baibiao Huang Prof. Peng Wang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(50):e202201095
Lead halide perovskite has triggered a lot of research due to its superior optical properties. However, halide perovskite materials have poor environmental stabilities and are easily affected by external factors such as water and heat, resulting in structural decomposition and performance failure. Contrary to this commonplace concept, it is found that CsPbBr3 (CPB) can convert to CsPb2Br5 (CP2B5) partially when meeting a small amount of water, and the CsPbBr3@CsPb2Br5 (CPB@CP2B5) composite is synthesized by an in situ method accordingly. The CPB@CP2B5 composite shows an enhanced catalytic performance compared with pure CPB, as well as a dramatically synergistic effect of photo and thermal for catalytic CO2 hydrogenation. The CO production rate of CPB@CP2B5 is determined as 69 μmol g−1 h−1 under light irradiation at 200 °C, which is 156.8 and 43.4 times higher than that under pure photo (0.44 μmol g−1 h −1) and pure thermal (1.59 μmol g−1 h −1) condition, respectively. Meanwhile, the CPB@CP2B5 sample is also stable, which shows no significant decline in the catalytic activity during 8 cycles of repeated experiments. The probable mechanism is explored by utilizing a series of in situ characterizations. 相似文献
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Zhenxing Shen Xuxiang Li Junji Cao Sandrine Caquineau Yaqiang Wang Xiaoye Zhang 《中国颗粒学报》2005,3(5):260-264
The objectives of this research were to characterise the clay minerals composition of soil-derived dust in Northern China and to set up a mineralogical signature to trace their origin. Mineral composition of aerosol particles was investigated at Aksu, Dunhuang, Yulin, Tongliao and Changwu during an intensive field campaign period of ACE-Asia. The results show that the kaolinite (K) to chlorite (C) ratio is sensitive to the regional origin of Asian dust. Western source areas (represented by Aksu) displayed the lowest K/C ratio of 0.3 (average), while it was found to increase up to 0.70 (average) upon moving towards northern source areas (represented by Yulin). By studying transported dust in a deposition area representative of the Chinese Loess Plateau, the usefulness of the K/C ratio, when associated with back air-mass trajectories, was found to lie in revealing the origin of the dust. Comparison of the mineralogical data between Asian dust and Sahara dust, shows that the K/C ratio is also an effective signature to identify the source areas on a hemisphere scale. 相似文献
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本文利用G.M.Reed构造的Moore机器证明了:(1)Moore空间中的弱Lindelof住严格介于CCC与DCCC之间.(2)强星可遮的Moors空间不必是星仿紧的. 相似文献
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Guan Sujun Hao Liang Yang Yaqiang Yoshida Hiroyuki Zhao Xinwei Lu Yun 《Journal of Solid State Electrochemistry》2021,25(2):603-609
Journal of Solid State Electrochemistry - Rutile TiO2 forms on TiC coatings (TiO2/TiC coatings) during carbon-embedding heat treatment (cHT) for TiC coatings. The photocatalytic activity of... 相似文献