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排序方式: 共有164条查询结果,搜索用时 16 毫秒
1.
Tao Wang Ying Tong Wenjiao Xiao Lei Guo Brian F.Windley Tatiana Donskaya Shan Li Narantsetseg Tserendash Jianjun Zhang 《国家科学评论(英文版)》2022,9(5):167-178
Tracing the closure of oceans with irregular margins and the formation of an orocline are crucial for understanding plate reconstruction and continental assembly.The eastern Central Asian Orogenic Belt,where the Mongol-Okhotsk orocline is situated,is one of the world’s largest magmatic provinces.Using a large data set of U-Pb zircon ages,we updated the timing of many published igneous rocks,which allowed us to recognize tightly ’folded’ linear Carboniferous-Jurassic magmatic belts that wrap arou... 相似文献
2.
计伟 《贵阳金筑大学学报》2012,(1):9-11
主要是对参与人的被选方案集作些规定以及不具传递性的偏好作一些限制,得到了一些效用函数表示结果,统一和推广了许多已知结果。 相似文献
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以月季"卡罗拉"为试材,采用不同浓度的脱落酸单剂作为保鲜液,分别对月季"卡罗拉"切花花枝进行保鲜处理,对瓶插寿命、花径改变量、花枝鲜重、叶绿素及花青素等研究其相关形态指标变化,结果表明:天然脱落酸(S-诱抗素)在月季鲜切花保鲜方面的较佳单剂浓度为:1.0 mg/L与2.0 mg/L. 相似文献
4.
周伟光 《南京晓庄学院学报》2003,19(4):54-55,120
利用格序置换群是研究格序群的重要工具之一,本文论述了在格序置换群里起重要作用的概念:n可迁性。并论述了迷向子群在其中的作用。 相似文献
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Nancy L. Halliday Mary B. Moon Daniel L. O'Donoghue Britta M. Thompson Sheila M. Crow 《Anatomical sciences education》2019,12(4):399-406
The University of Oklahoma College of Medicine has conducted an annual Anatomical Donor Luncheon where families of the anatomical donors met anatomy dissection groups of medical students. The luncheon presented an opportunity for donor family members to share the life story of their loved one with the medical students prior to the start of the anatomy course. This study was designed to understand the impact of the Anatomical Donor Luncheon on families of the donors. Seven families in two different focus groups were included to explore the reactions and attitudes of the donor families to meeting the medical students. Conversations were digitally recorded and transcribed. Qualitative analysis of textual data were coded by three investigators using the Constant Comparative Method. To provide evidence of validity, a form of member checking was utilized. For further triangulation, an analyst not involved in conducting the focus groups or analyzing the data, re-coded all data. This analyst used categories and themes identified by the original analysts, ensuring validity of the themes and any negative cases (data not supporting or contradictory of the established categories and themes). One meta-theme and three sub-themes were identified. The meta-theme was Donor Family Participants Experience Transformation and Closure, and sub-themes were Motivators for Participation, Optimal Venue Factors, and Optimal Medical Student–Anatomical Donor Family Interactions. Study findings indicated the Anatomical Donor Luncheon facilitated closure on the death of their loved one, and transformed their apprehension about the luncheon and body donation into an attitude of gratitude and appreciation. 相似文献
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梁雨 《华中科技大学学报(社会科学版)》2006,20(4):62-65
补语指向主语的动结式可以分为三种,分别以“唱哭”、“听懂”、“吃腻”为代表。该三类动结式的句法表现不同,深层结构也各不相同。三者的差异可以通过“优先满足V2论元投射原则”得到解释。 相似文献
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文章从日语自、他动词的特征分析入手,并举例分析了日语自、他动词的几种误用,以期帮助日语学习者在一定程度上更为清晰地区分自、他动词,构建相对完整的日语语法体系。 相似文献
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Sue Shepherd 《Perspectives: Policy and Practice in Higher Education》2017,21(4):129-134
Pre-1992 English universities are changing the way they appoint their deputy and pro-vice-chancellors (PVCs). Traditionally, PVC posts were filled by internal secondment from within the professoriate, but these days an increasing number are appointed by means of external open competition involving advertisement and/or executive search. So has this ‘opening up’ of PVC positions created new career progression opportunities for professional services managers? Findings from a census, online survey and interviews with a range of senior university managers suggest not. Despite the PVC role becoming more managerial, those getting the jobs remain overwhelmingly career academics. Professional services managers confront a glass wall, excluded from consideration by a non-negotiable requirement for academic credibility. Aware they have little chance of getting a PVC job, they are unlikely to apply. The continued monopolisation of PVC posts by academic managers represents a form of social closure that serves to maintain their elite status. 相似文献