in the ion-type RE deposite in South China, the host rocks of REE minerals are igneous and metamorphic rocks , such as granite, granite-porphyry, granitite, muscovite granite, granodiorite, rhyolite, tuff, lamprophyre...in the ion-type RE deposite in South China, the host rocks of REE minerals are igneous and metamorphic rocks , such as granite, granite-porphyry, granitite, muscovite granite, granodiorite, rhyolite, tuff, lamprophyre, alkaline rocks, granite-gneiss, stuff, gneissic granite.These various types of rocks occurred in the environment of humid subtropical zone with a specific topographic relief. During a long-term geological process, they were weathered and alterated into montmorillonite, gibbstite, vermiculite and the dioctahedral type of clay minerals, such as kaolinite, halloysite-0. 7 nm , halloysite-1. 0 nm and ferrohalloysite. All of these clay minerals are the REE carriers. The REE in the ion-type RE deposits came from there source: 1) the REE -bearing rock-forming minerals in host rock, such as microcline and amphibole:2) the accessory minerals in host rocks, such as allanite, gadolinite-(Y), sphene , parisite-(Y), and fergusonite-(Y). For a long geological time the weathering and leaching processes caused the minerals to be disintegrated and to free REE ions. The REE cations can be adsorbed on various clay minerals associated. The categories of ion -type RE deposite depend on the species of RE minerals and the lithological characters of the host geological body in the ore deposit area.展开更多
随着共享经济在各行各业的渗透发展,共享住宿平台开始对旅游行业产生重要影响。尽管有一些国外旅游管理文献开始从行为角度研究旅行者参与共享住宿平台的内在行为动机,但缺乏从平台网络效应视角分析平台两边参与者如何影响彼此的平台参...随着共享经济在各行各业的渗透发展,共享住宿平台开始对旅游行业产生重要影响。尽管有一些国外旅游管理文献开始从行为角度研究旅行者参与共享住宿平台的内在行为动机,但缺乏从平台网络效应视角分析平台两边参与者如何影响彼此的平台参与行为,尤其缺乏房东角度的研究。本研究基于信息系统持续使用的相关文献,从共享住宿平台房东的角度,以同边网络效应和跨边网络效应视角探索房东对共享住宿平台持续参与意愿的影响机理。本文利用收集到的288名房东一手调查数据,采用St at a13.0对研究模型进行检验。研究结果发现:(1)房东对平台的感知有用性和满意度对持续参与意愿具有显著的正向影响作用;(2)跨边网络效应在感知有用性对平台满意度的作用中呈正向调节作用;(3)同边网络效应在感知有用性对平台满意度和持续参与意愿的作用中呈倒U型调节作用。该发现为共享住宿平台的长期稳定发展提供了一定理论依据,并对旅游行业如何接纳和发展共享经济模式具有现实意义。展开更多
文摘in the ion-type RE deposite in South China, the host rocks of REE minerals are igneous and metamorphic rocks , such as granite, granite-porphyry, granitite, muscovite granite, granodiorite, rhyolite, tuff, lamprophyre, alkaline rocks, granite-gneiss, stuff, gneissic granite.These various types of rocks occurred in the environment of humid subtropical zone with a specific topographic relief. During a long-term geological process, they were weathered and alterated into montmorillonite, gibbstite, vermiculite and the dioctahedral type of clay minerals, such as kaolinite, halloysite-0. 7 nm , halloysite-1. 0 nm and ferrohalloysite. All of these clay minerals are the REE carriers. The REE in the ion-type RE deposits came from there source: 1) the REE -bearing rock-forming minerals in host rock, such as microcline and amphibole:2) the accessory minerals in host rocks, such as allanite, gadolinite-(Y), sphene , parisite-(Y), and fergusonite-(Y). For a long geological time the weathering and leaching processes caused the minerals to be disintegrated and to free REE ions. The REE cations can be adsorbed on various clay minerals associated. The categories of ion -type RE deposite depend on the species of RE minerals and the lithological characters of the host geological body in the ore deposit area.
文摘随着共享经济在各行各业的渗透发展,共享住宿平台开始对旅游行业产生重要影响。尽管有一些国外旅游管理文献开始从行为角度研究旅行者参与共享住宿平台的内在行为动机,但缺乏从平台网络效应视角分析平台两边参与者如何影响彼此的平台参与行为,尤其缺乏房东角度的研究。本研究基于信息系统持续使用的相关文献,从共享住宿平台房东的角度,以同边网络效应和跨边网络效应视角探索房东对共享住宿平台持续参与意愿的影响机理。本文利用收集到的288名房东一手调查数据,采用St at a13.0对研究模型进行检验。研究结果发现:(1)房东对平台的感知有用性和满意度对持续参与意愿具有显著的正向影响作用;(2)跨边网络效应在感知有用性对平台满意度的作用中呈正向调节作用;(3)同边网络效应在感知有用性对平台满意度和持续参与意愿的作用中呈倒U型调节作用。该发现为共享住宿平台的长期稳定发展提供了一定理论依据,并对旅游行业如何接纳和发展共享经济模式具有现实意义。
