山西龙矿主斜井黄土层施工技术的创新与实践

山西龙矿能源投资开发有限公司主斜井设计长度860m,倾角15°。井口以下有220m穿过黄土层,施工过程中遇到了两大难题:井口下90-130m段遇到含水层,黄土含水丰富,泥化严重,流动性强;井口下180-220m段,顶部黄土层厚度达到55-70m,进入深部带压区,随掘随垮塌和冒落,以致于施工现场困难重重。针对以上两种情况,分别采取不同的施工技术:对富水黄土层,采用U棚穿楔导峒的施工工艺,对深部带压黄土层,采用U棚导峒支护,最后完成永久支护。     

Human resource development in remote island communities: an evaluation of tour‐guide training in Vanuatu

About 30% of visitors to Vanuatu visit the outer islands, where ecotourism has recently emerged as a small‐scale but significant activity. In the face of increasing competition from comparable Asia–Pacific destinations, there has been pressure on tourism operators and the Vanuatu Government to improve product quality through mechanisms such as the development of high‐quality tours. One way to enhance product quality is through the provision of appropriate professional training for tourism sector employees, including local tour guides. The paper outlines a tour‐guide training programme delivered on the outer islands, which received financial assistance from several foreign aid agencies. The programme is an instructive example of an attempt to implement a human resource strategy in a developing country arising from the recommendations of a national tourism masterplan that sought the active involvement of international funding agencies in the implementation phase. The paper evaluates the effectiveness of the training programme and outlines the challenges of programme delivery. Copyright © 2002 John Wiley & Sons, Ltd.     

Ku频段多通道抗振激励源设计

介绍一种Ku频段多通道抗振激励源设计,采用X频段抗振低相噪介质稳频振荡器(DRO),通过结构固连减少各部分电路在振动环境中的相对运动,保证了激励源在振动条件下的稳定性.采用二次谐波镜频抑制混频器一次变频,简化了激励源电路并实现了对本振泄漏的高抑制度和良好的边带抑制.多芯片微带混合集成设计实现了激励源的小型化.研制的样机达到了振动环境下相噪优于-97 dBc/Hz@10kHz,本振抑制大于32 dB、边带抑制大于35 dB的优良性能,验证了设计技术的有效性.     

智能导游服务如何影响游客与智能导游品牌的关系——基于沉浸体验视角

本文基于沉浸理论,探讨智能导游服务对品牌关系的影响机制,检验沉浸体验在智能导游服务特性与品牌关系中的中介作用。本文邀请使用过智能导游服务的游客参与问卷调查,实证研究结果发现:(1)智能导游的心理意象特性对游客的沉浸体验有正向的影响作用;(2)智能导游的心理意象特性对认知、情感、行为意向等层面的品牌关系均有正向影响;(3)沉浸体验在心理意象和品牌关系中起中介作用。研究结论对于智能导游品牌关系构建的理论探索和管理实践具有重要意义和作用。