基于BIM的装配式建筑施工场地布置研究

考虑预制构件的布置和安全问题对施工现场布局的影响,通过建立预制建筑施工现场BIM模型,找出施工过程存在的碰撞冲突,减少不必要的二次搬运。在此基础上根据施工效率、成本优化、安全和可持续目标形成多个施工场地布置方案,通过层次分析与模糊综合评价相结合的方法评选出最优场地布置方案,为提高装配式建筑场地布置水平提供有效借鉴。     

Land assembly with taxes,not takings

We use a novel tax mechanism – ‘rejected offer reassessment’ (ROR) – in laboratory experiments to discourage seller holdout and facilitate land assembly. Under this mechanism, if a landowner rejects a developer’s offer, his taxable property value is reassessed to be equal to the rejected offer, increasing his taxes. We find that, relative to a control treatment, ROR discourages the magnitude of seller holdout (but not its frequency) and increases the rate of successful land assembly by almost 60%. It also increases the gains from trade by 22.1% relative to the control treatment, but the difference is not statistically significant.     

Valletta ECoC 2018 and cultural tourism development

Valletta, European Capital of Culture 2018 offers the prospect of cultural tourism development and attracting more visitors. However, tensions and opportunity costs potentially arise in planning such change. Strategies could be to intensify or diversify Valletta’s cultural tourism during the run-up to 2018; however, their appropriateness could differ in terms of competitive advantage, social inclusivity and sustainability. This paper focuses on the rationales for different approaches to tourism product development, adopting a broad relational perspective on product assembly that directs attention to the relationships, processes and contexts involved. Analysis suggests that innovative, experimental combinations of selected forms of intensification and diversification are needed to avoid locally insensitive cultural change and unsustainable tourism development.     

An examination of the effects of partitioned country of origin on consumer product quality perceptions

This paper deals with the effects of partitioned country‐of‐origin associations on consumer product quality evaluations. The main objective of this research is to examine the cognitive processes by which country‐of‐origin information influences the consumer's evaluation of a product. To study the psychological process by which the country‐of‐origin associations are integrated in the formation of related behavioural deliberation, a hypothetical structural model was developed. The model contains seven theoretical constructs, i.e. country of design, perceived product sophistication, country of assembly, perceived manufacturing excellence, country of parts, perceived product quality and perceived product design. Data were analysed via structural equation models using Analysis of MOment Structures (AMOS) 5.0. Results show that countries that already have positioned themselves around a reputation for technological innovation related to product development and manufacturing may expect consumers to transfer those associations to new products from the country.     

基于ArcEngine的城镇土地定级估价信息系统设计与实现

研究目的:通过研发新的城镇土地定级估价系统,弥补现有土地定级、估价系统存在的不足,以期更好地为国土管理,城镇土地市场的正常、高效、科学运转提供保障。研究方法:组件式地理信息系统,Kriging插值技术,多次方差。研究结果:研发了基于Arc Engine的重庆市土地定级估价系统,该系统包含了土地定级和土地估价两个部分,增加了障碍因素分析模块,在系统研发的同时制定了定级估价数据库标准,提升了系统的通用性。研究结论:应用于重庆市进行实例验证,得到的结果基本符合重庆市的土地等级和基准地价的实际情况。     

分级加载下炭质板岩蠕变特性的试验研究

蠕变特性是岩石类材料的重要力学性质之一,与岩石工程的长期稳定和安全密切相关。为了解炭质板岩的蠕变特性,采用RLW-1000岩石流变试验机进行了单轴压缩蠕变试验。选用广义Kelvin模型、Burgers模型及FC元件组合模型进行了参数拟合分析。分析表明:板岩在低应力水平下,FC元件组合模型拟合效果较好,而在高应力水平下Burgers模型拟合结果优于其余2种模型。总体来讲,不论应力水平的高低,Burgers模型能够较好地反映炭质板岩的蠕变特性。同时,对不同应力水平下的蠕变曲线进行参数拟合,发现黏滞系数在较低应力水平下随时间而增大,而在较高加载应力下随时间显著减小,表现为应力水平和时间的函数,研究成果可为进一步了解该岩石的蠕变特性提供模型参数和设计依据。     

复杂地层井眼轨迹控制方法研究

川西凹陷中江回龙构造地区地层压力系统复杂,气层多且薄,同时存在岩石可钻性差、砂泥岩互层频繁以及地层倾角大等因素,在直井段井斜和方位控制难度大,钻进效率低,斜井段着陆难度大,需要多次进行轨迹调整,使得该地区水平施工和井眼轨迹控制困难。根据该地区地质构造特征,结合井眼轨迹的影响因素,深入分析钻井施工和轨迹控制的问题和难点,从井下钻具组合优选、剖面优化设计、造斜段控制等方面进行井眼轨迹控制方法研究。通过在该区块施工的钻井,总结出具有可行性的井眼轨迹控制方法,为该区块水平评价井优、快钻进提供技术参考。     

基于Unity 3D的某飞行器虚拟拆装系统设计

目前商业三维软件的数字装配只是对某单个产品或者部件的装配,而产品实物模装成本高,且不能实时更改、周期长等缺陷.本文将虚拟装配技术使用在飞行器的设计、制造装配的过程,实现了某飞行器产品装配过程可视化,缩短了产品设计周期,减少了产品的研制经费.通过采用Unity引擎,采用交换式显示器,进行某飞行器产品的装配与拆卸系统的设计...     

装配式结构施工房建项目成本管控探析

建筑行业迅速发展过程中,房屋建筑工程项目不断增多,而装配式结构施工技术是在施工现场直接组装,作为一种新型施工方式具有诸多优势,但必须做好成本管控工作。论文首先对装配式建筑施工进行简单概述,然后分析装配式结构成本高的原因,最后提出有效的成本管控措施。     

Assembling land for urban revitalization in the presence of linchpin parcels and information asymmetries: An experimental investigation

This study uses economic experiments to determine if information asymmetries are likely to frustrate government efforts to assemble land for urban revitalization when there is a linchpin parcel that must be acquired to move a development project forward. Results suggest holdout behavior is more pronounced when landowners know a linchpin parcel exists. Surprisingly, landowners who know they control such parcels are found to be more willing to sell than those who are uncertain about the strategic importance of their properties. These observations raise interesting questions about the nature of holdout problems and how they can potentially be overcome by approaching land assembly in a transparent manner.