弹道导弹高能粒子辐射环境适应性研究

导弹飞行环境中包含多种高能带电粒子,会对敏感电子器件产生辐射环境效应影响。针对3个典型的弹道获取高能粒子能谱分布情况,开展辐射环境及效应的分析,探讨导弹对高能粒子辐射环境的适应性,提出防护设计建议,以改善其适应性。     

掘进机截割部混合动力传动系统设计与分析

为提高掘进机在深部煤岩工况下自适应性和掘进能力,分析了现有纵轴式悬臂掘进机在掘进时的工作特点以及截割部存在的问题,提出基于行驶系液压动力与原截割电机转矩耦合的截割部混合动力传动方案。对新截割传动系统进行合理的参数匹配并建立相关部件的力学模型,探索了不同工况下混合动力传动系统的工作模式。对新型掘进机的自适应性以及突变工况下系统缓冲特性进行了模拟分析,结果表明：新型混合动力截割系统能够有效适应负载变化,主截割电机可维持在恒功率高效率点附近工作;液压系统的柔性对突变工况下的冲击载荷有明显的缓冲作用。分析结果对新型采掘装备设计提供参考。     

电流差动保护在逆变型新能源场站送出线路中的适应性分析

新能源电源通过电力电子装置并网,其故障特性受控制策略影响而发生根本性变化,传统继电保护原理存在适应性问题。送出线路作为新能源场站电力外送的关键通道,其主保护电流差动保护能否正确动作对于新能源高效利用和系统安全运行十分重要。针对逆变型新能源场站,推导了逆变型新能源电源短路电流表达式,分析了各相短路电流之间的相位关系及其影响因素。在此基础上,分析了送出线路发生不对称短路时电流差动保护在并网系统为强、弱两种情形下的动作性能。研究结果表明,送出线路发生两相短路时,差动保护在并网系统为弱系统时存在拒动的风险、为强系统时灵敏性下降但不会拒动;送出线路发生接地故障时,零序电流的存在使得差动保护在并网系统为强、弱系统时均能可靠灵敏动作。实时数字仿真器(RTDS)试验验证了理论分析。研究结论为逆变型新能源场站送出线路主保护配置提供了参考。     

“可移动式”公租房：对城市边缘空间的再利用--对公租房适应性的探索与思考

本文通过公租房对使用者和城市两大层面的适应性分析,提出了一种可移动式公租房模式,包括其模式的定义和特点、生命周期、工业化生产等,希望能够对公租房的适应性模式探索提供一个思路。     

Designing for construction workers’ occupational health and safety: a case study of socio-material complexity

Drawing upon an empirical analysis of the design and construction of a food processing facility, a theoretical understanding of the impact of design decision-making on the occupational health and safety (OHS) of construction workers is developed. It is argued that current policy and legislative approaches to Construction Hazard Prevention through Design (CHPtD) are inherently limited because they do not adequately reflect the socio-material complexity of decision-making in construction design. Specifically, the simplistic attribution of responsibility to a single socio-technical actor, ‘the designer’, does not reflect the multiple and disparate influences that impact upon OHS outcomes. Nor do existing CHPtD policy frameworks, management processes and tools recognize the manner in which the interactions and associations between relevant project stakeholders and various non-human artefacts shape (and are also influenced by) the evolution of design decisions. Drawing on actor-network theory (ANT) and using embedded units within a case study approach, the interactions between human actors and non-human artefacts are explored in relation to the design of four components of the food processing facility. The way in which design decisions unfolded and shaped OHS experiences during the construction stage of the project is revealed. The research highlights limitations inherent in current approaches to the management of CHPtD and the need to develop a more robust theoretically based approach to integrating OHS considerations into construction design practice.     

User perceptions of ICT impacts in Swedish construction companies: ‘it’s fine,just as it is’

The use of information and communication technologies (ICT) in construction companies has been growing steadily during the last decade. However, few studies inquire into either perceptions of the impact of actual ICT use or perceptions among different occupational groups in construction companies. The aim of the paper is to explore users’ general perceptions of ICT impacts in the post-adoption stage and analyse the implications for construction management practice. A mixed methods approach was used. Quantitative data were collected using a web-based survey both in a major construction company and among medium-sized companies in Sweden. Data from 294 returned completed questionnaires were analysed with t-tests and multiple regression analysis. In addition, participant observations and semi-structured interviews were conducted within the major construction company in order to strengthen the analysis. It can be concluded that respondents are generally fairly satisfied with the ICT. Differences in perceptions among occupational groups can be explained by the nature of work tasks and the original intentions for using ICT as a means of control and calculation. Even if respondents perceive that a further development of ICT could improve competitiveness, they do not want to increase their use of it in their workplaces. They basically think that ‘it is fine, just as it is’. This indicates that a challenge in construction management is to investigate how prevailing and new ICT applications can be used to develop the industry.     

公租房适宜套型设计策略浅析

公租房作为政府保障性住房正在全国范围内大规模的规划与建设,如何把握设计尺度成为广大建筑设计者研究的课题。本文旨通过公租房使用对象的特点及其对住房需求的分析,结合公租房所面临的设计及建造的特点,浅析能够满足功能适应性原则并且适宜在标准化体系下设计建造的公租房套型设计策略。     

山西断陷盆地浅层地温能开发适宜性分区方法

以大同市为例,介绍了山西断陷盆地平原区浅层地温能的分区原则和分区方法,通过分析大同市地层岩性、水文地质条件、地质构造和地裂缝地质环境问题,统筹考虑大同市区域地质条件、换热方式及建设成本,对大同市进行了浅层地温能的开发利用适宜性分区,以选择正确的开发利用方式。     

“复合生态”理念下的EBD园区建筑空间发展研究——以重庆北部新区EBD园区为例

该文以北部新区EBD园区2001年至2013年间的发展历程为例,详细介绍了"复合生态"理念对建筑空间演变的影响。从设计策略层面对建筑空间发展过程中的经验和问题进行了总结,并对未来的建筑空间系统发展提出了改善建议。     

高校研究生的心理适应及对策

随着高校研究生扩大招生 ,越来越多的学生加入到了研究生的队伍 ,面对迥然不同的教育模式 ,越来越多的学生表现出心理不适应。本文对其不适应的原因进行了深入分析 ,并从多角度提出了研究生心理调适的对策。