Asymmetric aminocatalysis has become one of the most powerful strategies for the transformations of carbonyl substances over the past two dec-ades.Here,we descr
面对严峻的就业形势,大学毕业生手持多份录用通知仍继续求职的现象却十分普遍。基于大学毕业生的问卷调查数据,考察最优化决策倾向对大学毕业生求职行为强度和结果的影响。研究发现:最优化决策倾向显著正向影响大学毕业生的求职行为强度,进而正向影响大学毕业生获得录用通知的数量,但对求职满意度的影响不显著。因此,对于大学毕业生拿到录用通知后继续求职这种现象应辨证看待,不能仅停留在对大学毕业生道德的指责上,要正视最优化决策倾向这种决策风格的正面影响。一方面,高校要引导大学毕业生理性看待获得录用通知数量问题,注重大学生职业生
To quantify water erosion rates and annual soil loss in mountainous areas,two different empirical models were used to estimate the effects of soil erosion in a
省级来华留学教育政策引导着各地区的来华留学教育发展。作为“一带一路”和长江经济带联结点上的重要城市,重庆能够为“一带一路”建设的人才培养发挥更大作用。采用内容分析法,从政策工具的视角对京、津、沪、云、川、渝六省市的来华留学政策进行比较研究。结果表明,重庆在整体政策结构上呈现出重环境、轻需求的特点;在来华留学培养模式、教育机构、企业参与来华留学教育等方面的供给型政策制定略显不足;留学生在渝就业创业等需求型政策与来华留学教育的对接有待加强;环境型政策中关于教育质量保障体系的政策制定较薄弱,并缺乏与来华留学教育
Main observation and conclusionrnAn efficient Lewis acid enabled ketones phosphonylation to synthesize vinylphosphonates has been developed.This method relays o
处在高温环境下的岩石力学性质可能发生劣化进而导致岩体稳定性降低,因此研究高温作用下岩石的本构行为具有重要意义.基于现有岩石统计损伤本构模型研究,引入Weibull分布函数
Main observation and conclusionrnPolymerization-induced self-assembly (PISA) is an effective method to prepare block copolymer (BCP) particles with various mor-
Main observation and conclusionrnTransition-metal-catalyzed C—H insertion of metal-carbene represents an excellent and powerful approach for C—H functionaliza
Main observation and conclusionrnRationally designing inexpensive iron nitrides that have large conductivity,high theoretical capacity,and rapid ionic diffusion
The well-defined conformational properties of axially chiral com-pounds bring extraordinary values to an assortment of bioactive mol-ecules,advanced materials,o