Results 131 to 140 of about 32,760 (280)
Rare Metals, EarlyView.ABSTRACT Proton exchange membrane fuel cells (PEMFCs) require advanced bipolar plate coatings to enhance efficiency, durability, and commercialization potential. This review presents a systematic framework for evaluating and designing bipolar plate coatings, integrating material selection, performance metrics, deposition techniques, and future ...
Shijie Li +12 more
wiley +1 more source
Dianci bileiqi, 1992 （上接《电瓷避雷器》1992年第5期第43页）4 生产可靠绝缘子的因素前面我们研究了影响绝缘子长期性能的劣化原因及其评价方法.根据这一研究结果,对生产可靠瓷绝缘子的重要因素叙述如下.4.1 材料4.1.1 瓷铝质瓷有较高的机械强度和韧性.因此,为生产可靠的悬式绝缘子,采用铝质瓷是必需的.另外,瓷质中的颗粒尺寸、均匀性和晶相含量也是重要的因素.也就是说,
王春美, 张乙明, 张洪军
doaj
Rare Metals, EarlyView.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
Dianci bileiqi, 1999 简要介绍了我厂棒形绝缘子、瓷套用铝质高强度坯料配方的研究应用情况。通过选择新的粘土原料研制配方，改善了坯料的工艺性能和瓷质性能，极大地提高了产品生产过程的合格率。
周顺宇, 苗长河
doaj
Qualitative studies on occupational stress experience and coping style in male nurses: a meta-integration [PDF]
, 2023 LIU Shuyang
core +1 more source
A Qualitative Study on the Influencing Factors of CEO’s Empowering Leadership Behavior [PDF]
, 2015 在企业经营管理中，高管作为企业最高战略决策层团队成员，是企业不可或缺的核心人才。提升高管工作能力和给予他们更多工作自主性对组织发展至关重要，这使得CEO对高管授权赋能的必要性强烈凸显。为提高CEO授权赋能水平，企业有必要了解哪些因素影响CEO的授权赋能领导行为。只有深入了解影响领导授权赋能行为的因素，才能从根本上将授权赋能落实。 本文探索CEO为什么会授权赋能以及哪些因素会促进其对高管的授权赋能。本文通过深度访谈获得一手资料，借助扎根理论思想在Nvivo10质性分析软件中对资料进行编码分析 ...
刘星
core
Rare Metals, EarlyView.ABSTRACT The development of highly efficient and stable nonprecious metal electrocatalysts for the acidic oxygen evolution reaction (OER) is crucial to advance proton exchange membrane (PEM) water electrolysis. In this work, a dual synergistic strategy was proposed by constructing a Ce‐modified MnO2/MnO heterostructure.
Chuanbin Li +7 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2011 女性盆腔肿块的性质、种类复杂,术前很难诊断。发现和应用敏感性和特异性均较高的血清肿瘤标志物来进行盆腔恶性肿瘤尤其是卵巢癌的早期诊断一直是人们致力于研究的课题 ...
董毅, 邢琦, 王燕
doaj
Dilemma and way out of implementation of the general education curriculum in Chinese research universities —— A qualitative study based on a case university [PDF]
, 2014 摘要 当下中国的高等教育在传统与现实的结合中背负着双重压力。一方面表现为“学而优则仕”所导致的学历至上主义；另一方面，功利主义和绩效责任所引发的教育市场化、产业化，要求大学实现效益与效率的最大化，使其具有职业训练、产品加工的特性。大学，尤其是研究型大学倘若丧失了培养“全人”的理念，失去了“精神象牙塔”的阵地，成为“制造工具的工厂”，必将导致高校为社会发展培养人才的链条失去“韧性”，面临价值观扭曲的危险。因此，发展通识教育，回归大学之道，成为高等教育改革与发展的当务之急。 欧美国家的通识教育起步早 ...
宋宸仪
core
Rare Metals, EarlyView.ABSTRACT Two‐dimensional (2D) nonlayered niobium nitrides have attracted considerable interest for electrochemical energy storage. However, the synthesis of these materials is hampered by their nonlayered crystal structures, which are characterized by strong three‐dimensional chemical bonding.
Rui Huo +7 more
wiley +1 more source