Olivine-norite rock detected by the lunar rover Yutu-2 likely crystallized from the SPA-impact melt pool

Chang’E-4 landed in the South Pole-Aitken (SPA) basin, providing a unique chance to probe the composition of the lunar interior. Its landing site is located on ejecta strips in Von Kármán crater that possibly originate from the neighboring Finsen crater. A surface rock and the lunar regolith at 10 sites along the rover Yutu-2 track were measured by the onboard Visible and Near-Infrared Imaging Spectrometer in the first three lunar days of mission operations. In situ spectra of the regolith have peak band positions at 1 and 2 μm, similar to the spectral data of Finsen ejecta from the Moon Mineralogy Mapper, which confirms that the regolith''s composition of the landing area is mostly similar to that of Finsen ejecta. The rock spectrum shows similar band peak positions, but stronger absorptions, suggesting relatively fresh exposure. The rock may consist of 38.1 ± 5.4% low-Ca pyroxene, 13.9 ± 5.1% olivine and 48.0 ± 3.1% plagioclase, referred to as olivine-norite. The plagioclase-abundant and olivine-poor modal composition of the rock is inconsistent with the origin of the mantle, but representative of the lunar lower crust. Alternatively, the rock crystallized from the impact-derived melt pool formed by the SPA-impact event via mixing the lunar crust and mantle materials. This scenario is consistent with fast-cooling thermal conditions of a shallow melt pool, indicated by the fine to medium-sized texture (<3 mm) of the rock and the SPA-impact melting model [Icarus 2012; 220: 730–43].     

基于S-O-R框架的政府数据开放平台用户持续使用意愿研究

基于S-O-R框架,探讨了用户政府数据开放平台获取政府开放数据的持续使用意愿问题。以S-O-R为研究框架,融入"心流体验",研究政府数据开放平台的功能和社会属性,以及心流条件因素,共同作用于心流体验,最终影响用户的持续使用意愿的传导机制与路径过程,然后通过实证研究验证模型的合理性,最后得出结论：政府数据开放平台环境刺激和心流条件因素通过用户心流体验正向影响用户持续使用意愿。     

公共图书馆对弱势群体知识援助的研究评述

公共图书馆对弱势群体进行知识援助有助于促进社会公平正义。将关于公共图书馆对弱势群体进行知识援助的研究视角概括为历史实践的视角、信息公平的视角、制度的视角和社会包容的视角。提出通过实现理论本土化契合、完善公共图书馆法律制度、嵌入群体需求提供知识援助是进一步推进研究和实践的途径。     

用场效应管放大电路测量可逆电池的电动势

本文介绍应用场效应管放大电路来测量电池电动势的新原理与新方法.该测量原理与方法简单、实用,不但更新了传统的测量原理,而且也提高了测量精度和学生的学习兴趣及动手能力.     

针灸学教学资源库建设的思考

分析针灸推拿专业中针灸学教学资源库建设的必要性,总结目前我校针灸推拿专业中针灸学教学资源库建设的状况,思考针灸推拿专业中针灸学资源库建设今后的发展方向。     

Third-Party Sociomoral Evaluations in Children With Autism Spectrum Disorder

We examined explicit and implicit processes in response to third-party moral transgressions in children with autism spectrum disorder (ASD). Twenty 4- to 7-year-old children with ASD and 19 typically developing controls evaluated dynamic visual stimuli depicting intentional or accidental harm to persons or damage to objects. Moral evaluations, eye fixations, and pupil dilations toward the stimuli were collected. Results indicate a preserved capacity to understand the mental states of perpetrators and an implicit moral sensitivity to the third-party harms in children with ASD. Nonetheless, children with ASD showed specific sensitivity and emotional arousal when viewing damage to objects. These findings contribute to the understanding of the underlying mechanisms of moral reasoning in ASD and its possible association with the autistic symptoms.     

刘基和永嘉学派浅析

刘基从小受教于永嘉学派传人，和永嘉学派有师承之实。他承绪事功之学，以“见于行”、“措诸用”为旨归，和永嘉学派有共同的事功理论；他“敬以一之，仁以行之”，和永嘉学派有共同的事功实践；刘基和浙东事功学派、永嘉学派诸领袖虽然有不同的人生轨迹，但却有着共同的事功目标，通过经世治国。取得共同的事功业绩。     

繁华背后的落寞——从《万历野获编》管窥明代后期的文学思潮

《万历野获编》是明代重要的文学史料著作,书之所及：上述朝章掌故、下录琐事轶闻,无不毕陈。其中相当一部分条目承载着明代后期社会生活的繁华和文人精神情感的落寞。这对于全面、深入地了解明代社会风习和文人生态、心态,尤其是戏曲、小说等通俗文学思潮的变迁具有重要的文献价值。     

依托信息技术促进我国旅游信息化

旅游信息化是指利用电子技术、信息技术、数据库技术和网络技术等手段,充分整合各类旅游信息资源,使之成为发展旅游的生产力,成为推动旅游产业发展和管理水平的重要手段。近年来,我国部分地区旅游信息化建设取得了飞速发展,从而促进了该地区旅游产业的大发展,本文就推进旅游信息化的计算机网络技术、电子商务、电子政务、信息化队伍进行分析,探讨如何促进我国旅游信息化。