灵石县天石广场人防地下室设计若干问题探讨

介绍了人防地下室设计时应考虑的若干问题 ,分析了人防结构设计的特点 ,进而提出了防空地下室结构设计的一般原则 ,指出协调平战结合两种不同状态的具体措施     

明式家具的审美特征与现代中式家具设计

简单分析了“天人合一”和“阴阳五行”的哲学观对中国古代设计的影响;进而总结了明式家具的审美特征:自然美、空灵美、整体美、含蓄美、实用美、浪漫美;最后提出了在现代中式家具设计中不仅要运用有形元素,更应融入传统文化的精髓,以形成中式家具艺术文化特质。     

“天梁抬吊托梁拆柱”施工技术总结

本文对利用“天梁抬吊荷载转移法”将厂房个别重型排架柱拆除,并换上托架梁支承屋架荷载的施工实例进行总结,以为类似工程之参考。     

一种林间自装卸粉碎机底盘设计与分析

针对目前移动式林间粉碎设备存在的问题,提出了一种林间自装卸粉碎机底盘.介绍了其行走系统、车架、支撑系统、液压系统、制动系统、转向系统等.通过CATIA软件对该底盘进行了主要部件的三维建模和装配,并对底盘进行了强度分析.     

论中国建筑遗产周边环境的法律法规建设

法律法规建设是建筑遗产保护中极为重要的一环。经过几十年的发展,中国建筑遗产保护的相关法律法规有了长足的进步。然而,对于遗产周边环境的保护和整治工作仍缺少关注。本文针对遗产周边环境的保护这一议题,从国家法律和地方法规两个层面出发,对当前中国相关法律法规的内容进行解析,并对相关法律法规中存在的问题进行总结并提出建议。     

基于CREAM的航天发射场人因可靠性定量分析方法研究

以我国航天发射场安全评估为背景,基于认知可靠性和失误分析方法(CREAM),开展航天发射场人因可靠性(HRA)定量分析方法研究。首先结合航天发射场特点对共同绩效条件(CPC)进行改进,之后采用模糊方法处理CPC到控制模式之间的映射关系,提出了环境影响因子值的概念,提出了航天发射场HRA定量分析流程,最后针对火箭吊装过程进行了实例分析。     

Efficiency determinants of container terminals in Latin American and the Caribbean

Extensive use of containerized cargo has caused technological changes in the maritime industry and consequently port transformations. To face these new challenges, port reform processes were designed, coming to Latin America in the 90s. The main objectives were the modernization of ports and the promotion of competition and efficiency. However, there still seems to be potential for improving port efficiency. To assess the potential of this margin, this article analyses the evolution of the efficiency of the main container terminals in Latin America and the Caribbean, and determinants of inefficiency. One question this paper seeks to answer is whether increases in efficiency resulting from port modernization subsequent to reforms in Latin America and the Caribbean have been maintained over time. In addition, and in order to contribute to the definition of economic policies, the main objective of this paper is to analyse the factors that are currently influencing container ports inefficiency – specifically inter-port and intra-port competition. The estimation of a Stochastic Production Frontier shows an average level of technical efficiency of 83% in the 2000–2010 period, and a technological change of 5%. These results show that port efficiency has evolved positively, although affected by the economic crisis. Our findings also indicate that container terminals located in Mercosur countries, and ports with three or four container terminals, are the most efficient, and that transhipment ports are less efficient than other type of ports. According to our findings, LAC decision-makers should consider promoting inter-port competition and strengthening intra-port competition.     

磨损随机过程建模及实例分析

针对磨损过程的动态性和随机性,提出一种构件磨损随机过程建模方法,为磨损构件的可靠性分析和寿命预测提供基础。基于平稳随机过程,给出了磨损随机过程建模基本流程;以Ar-chard磨损公式为例,推导了任意时刻磨损量的分布函数,从而能够评估磨损构件的动态可靠度和概率失效时间;结合活塞气环的实测数据,建立磨损随机过程模型,并给出抗磨损可靠度随行驶里程的变化规律。通过算例发现,磨损随机过程模型与实际相符,而考虑稳态磨损过程的磨损率为随机变量,计算结果偏保守。这样,为工程构件磨损的定量评估探索新的途径。     

板料拉深有限元模拟冲模速度研究

运用ANSYS有限元软件采用不同的模拟冲模速度进行板料拉深过程分析。研究表明,达到筒形件极限拉深高度而不发生起皱和破裂的模拟冲模速度有一个数值范围,在数值范围内任意选取模拟冲模速度,对起皱和破裂预测不会产生较大的误差,但取较大的模拟冲模速度能极大地提高模拟过程的计算效率。     

基于模糊综合评判的装备采购评标方法

针对装备协作配套件采购评标问题,提出将模糊综合评判引入到装备采购的评标中去,建立了基于模糊综合评判的评标模型.以某装备协作配套件采购招标为例,其评标步骤包括:建立评语集、建立权重集、确定各因素隶属函数及进行模糊评判,得出结论.