侧压力系数对盾构隧道管片受力的影响

本文旨在以某地铁盾构隧道管片设计为背景,通过ANSYS有限元软件对不同侧压力系数情况下盾构隧道管片受力进行数值模拟,分析侧压力系数对盾构隧道管片受力的影响。     

国外近十年旅游目的地游客忠诚研究综述

本文对检索到的国外近十年旅游目的地游客忠诚研究相关文献进行了较为详细的梳理和评析。内容上这些文献主要围绕对三个基本问题的分析而展开:目的地忠诚的概念内涵和识别指标、目的地忠诚的驱动因素、目的地各忠诚细分市场的差异化营销和管理。最后,笔者还对国外该领域现有文献的研究局限作了简要分析,并展望其未来可能的发展走向,以期能为国内相关研究提供参考和启示。     

From broadway to the Bistro: Partnering with the arts to attract upscale customers

This article discusses the potential benefits to restaurants, especially upscale restaurants, of programs that support the arts. The importance of the arts and culture industry as an economic driver is presented along with an assessment of the state of funding for the arts in the United States. A demographic profile of those who attend arts and cultural events shows the upscale nature of the market. The results of a survey of 274 people demonstrate the positive attitude of respondents toward businesses, particularly restaurants that support the arts.     

盾构下穿建筑物变形分析与控制措施——以济南地铁4号线隧道为例

随着我国地铁的大力建设,其施工过程也受到越来越多复杂因素的影响,因此需要掌握每种因素的影响规律,并针对不同工况研究不同的加固措施。以济南轨道交通4号线邢村站至唐冶南站区间盾构施工为工程背景,利用ABAQUS有限元软件构建三维数值计算模型,分别对盾构隧道正下方穿越建筑物与侧下方穿越建筑物进行分析,并采取不同的加固措施进行研究。结果表明：在盾构隧道开挖正下方穿越建筑物的情况下,对于地表以及建筑物基础的沉降差,采用基础下注浆加固控制效果约为24%,隔离桩加固控制效果约为15%,拱顶注浆加固控制效果约为47%,拱顶注浆加固控制效果最好,但采用隔离桩加固控制效果较差,因此在正穿时不建议采用;在盾构隧道开挖侧下方穿越建筑物的情况下,对于地表以及建筑物基础的沉降差,采用基础下注浆加固控制效果约为24%,隔离桩加固控制效果约为33%,拱顶注浆加固控制效果约为49%,拱顶注浆加固控制效果最好,隔离桩次之,基础下注浆加固控制效果较差。     

Impact of environmental information disclosure and real estate segments on cost of debt: Evidence from the Chinese real estate industry

The novel part of this paper is to examine the individual and joint effects of the real estate segments (RETs) and environmental information disclosure (EID) on the cost of debt (COD) in the real estate industry in China. Building on extant literature, using 1,250 firm‐year observations from 2006 to 2016 and applying both Feasible General Least Squares and Two‐stage Least Squares Instrumental Variable approaches, we provide evidence that the commercial RET leads to an increase in the COD, while EID leads to a decrease in the COD. The joint effects of the RETs and EID on the COD indicate a significantly positive relationship with the COD. This signifies that even with the increased levels of EID in commercial real estate sectors, its COD is higher than for residential real estate sectors. These findings have important policy implications for environmental risk assessments for real estate sectors, their lending institutions and wider stakeholder groups.     

Profiling the segments of visitors to Portuguese protected areas

This study identifies the diversity of domestic visitors to Portuguese protected areas (PPA) based on benefit segmentation. The segments of PPA visitors are also compared with other nature-based tourist segments using some empirical benefit segmentation literature. Data were collected by means of a self-administered questionnaire and multivariate statistics techniques (principal components, hierarchical and K-means cluster analyses) were applied. Five distinct segments of visitors were identified based on the motivation for their visit and further characterized by the perceived importance of activities, facilities and services, frequency of visit and socio-demographics. Three segments are nature-focused and two are focused on activities or events. Only one segment shows specific interests and motivations associated with ecotourism and similar characteristics to international ecotourists; moreover, the reasons for the visit in one segment are unrelated to any of the motivations of nature-based tourism. Some implications for management are also described.     

The Influence of Novelty-Seeking and Risk-Perception Behavior on Holiday Decisions and Food Preferences

This research examines how novelty-seeking and risk-taking characteristics influence holiday dining preferences and travel style. International Tourist Role Scale and the Food Activity Preferences scale (FAP) were applied in combination with visual imagery to simulate different cultural food settings and restaurant situations. Three distinct market segments were identified. The three clusters included: familiarity-seeking generalists, organized comfort-seekers, and explorers. The findings highlight the differences across the clusters with respect to their demographic profile, travel style, risk-taking, and food preference decisions. The findings suggest that if Australian tourism management wishes to stay competitive and attract the growing Chinese inbound market, they should take both novelty-seeking and risk-taking into account when planning their marketing strategies.     

盾构隧道管片上浮原因分析与对策研究

根据郑州市轨道交通1号线某盾构区间施工过程中遇到的管片上浮问题,从地质条件、同步注浆浆液、盾构姿态等方面分析原因,提出针对郑州地质条件下控制盾构隧道管片上浮的技术措施。     

浅谈盾构施工风险分析及应对

盾构法施工较以往矿山法施工,在保障人员安全方面,已大大提高,但在施工期间依旧存在一定风险,如涌水涌砂、地表建筑物沉降等等。本文对盾构施工过程中存在的风险进行分析,并提出相应的控制措施,希望能够对盾构施工项目起到参考借鉴作用。     

集合器对等线密度段彩纱性能的影响

通过选用不同规格的集合器,采用等线密度段彩纱纺纱方法,在多功能细纱机上分别纺制棉、毛两种原料的段彩纱,并且对其纱线的毛羽和条干进行测试.研究结果表明：细纱机在使用集合器时对等线密度段彩纱的质量有较大的改善作用,可较明显地改善条干、减少毛羽.同时还发现,不同规格集合器对纺纱效果影响较大,因此可以通过合理配置纺纱工艺,选择适宜的集合器出口口径来提高纱线质量,从而更好地发挥集合器的作用.