羌族建筑及其抗震性能分析

羌族是我国最古老的民族之一。羌族石屋和碉楼承载着许多传统建筑的精湛技艺。通过分析羌族建筑的材料运用和修建方法,找寻其在建筑抗震技术上的价值。建议在5.12地震后的恢复重建中,宜遵循村民按照传统方法自建的原则。     

Unpacking the effect of IT capability on the performance of export-focused SMEs: a report from China

Abstract.  Export-focused small and medium-sized enterprises (SMEs) in China face a number of barriers to success, two primary ones being the liability of foreignness and resource scarcity. In order to transcend these challenges and be able to survive/prosper in the hypercompetitive international market, where players include large resourceful multinational organizations with experience in varied national contexts, these firms need to develop different organizational capabilities. In this paper, we specifically examine the role of a key organizational capability – information technology (IT) capability – and its different dimensions, in determining performance of export-focused SMEs in China. Our study reveals that IT capability has a positive impact on such firms' performance. This finding indicates the need for their owners/managers to invest in IT capability. Further, the study also highlights specific sub-dimensions of IT capability that export-focused Chinese SMEs should (or should not) develop, so as to derive maximum performance-related gains for the minimum amount spent on IT.     

操作系统课程教学与学生能力培养

本文介绍了我院在操作系统教学过程中通过改进教学方法、引入任务驱动和加强实践环节,对学生的思考能力、学习能力和实践动手能力进行培养的一些经验。     

Muscular capabilities and workload of flight attendants for pushing and pulling trolleys aboard aircraft

Increasingly in the recent years, passengers’ services are extended into the ascent and descent flight phases on short distance flights. Trolleys containing the required meal and beverage items are used for these service operations and pushed or pulled along the aisles of the aircraft. Flight attendants reported about increased musculo-skeletal disorders and had been complaining about high physical workload from handling trolleys. In order to ensure acceptable load levels for pushing or pulling operations of trolleys, the physical capabilities of the collective “flight attendants” had been investigated by means of force measurements at maximum voluntary contraction (MVC) level and associated relevant anthropometrical and biometrical data. CEN and ISO standards as well as international and national German methods were used to derive recommended force limits for pushing/pulling operations with respect to the physical capabilities of the target group “flight attendants”. Comparing these recommended limits with the force requirements per shift under various conditions of trolley handlings (inclination of the floor, type and weight of trolley, mode of handling, frequency of operation) showed that especially for higher floor inclinations and trolley weights, flight attendants work (substantially) above recommended limits. It became also apparent that the handling of half-size trolleys is unexpectedly high demanding due to high vertical force components, caused by the unfavorable location of their center of gravity.

Relevance to industry

On short-distance flights, passengers’ services are performed by means of trolleys from the ascent to the descent flight phases. Flight attendants had been complaining about high physical workload. This study offers recommendations on maximum force limits for the handling of trolleys with respect to the muscular capacities and work situations of flight attendants on short-distance flights.     

城市综合承灾能力评价的粒子群优化投影寻踪模型

针对城市综合承灾能力评价的多因素影响问题,建立了城市综合承灾能力评价的粒子群优化投影寻踪模型.该方法依据样本自身的数据特性,利用粒子群优化算法寻求投影寻踪评价模型的最佳投影方向,并通过投影方向计算反映评价样本综合特征信息的投影特征指标,然后根据投影特征指标值进行城市综合承灾能力评价分析,因而避免了诸如各评价因素权重确定的主观性.实例分析结果与各城市承灾能力实际状态基本一致,显示了该方法能利用一个综合反映多因素之间复杂关系的特征指标给出相应的评价等级结果,且根据计算结果可以分析影响城市综合承灾能力的主要因素.     

供应链知识管理能力成熟度评价研究

借鉴能力成熟度理论提出了供应链知识管理能力成熟度,并用其度量供应链知识管理水平。从供应链知识管理的基础设施支撑能力、组织结构支撑能力、企业文化支撑能力、知识获取能力、知识组织能力、知识转移能力和知识应用能力等7个方面出发,构建了供应链知识管理能力成熟度评价指标体系。基于语言评价信息的改进AHP—FUZZY方法对供应链知识管理能力成熟度进行评价,最后通过实例,说明该方法的有效性、实用性。     

无源雷达探测覆盖能力柔性评估建模研究

针对无源雷达作战效能量化评估问题,将有效探测距离、探测覆盖度指数等作为表征无源雷达探测覆盖能力的典型指标,建立了相应的指标体系和指标解算模型;采用基于算子的柔性评估建模方法,设计实现了指标对应的评估算子,并以这些评估算子为基础建模单元,构建了与指标体系完全一致、灵活、适用的算子树评估模型.评估实验结果表明,该模型能够支持无源雷达探测覆盖能力评估解算和影响因素分析,可用于无源雷达作战部署决策等时的多方案优选,对于同类装备作战效能量化评估也具有一定的借鉴和参考价值.     

水资源监控能力建设功能需求及实施策略

当前,我国水资源监控能力总体薄弱,缺乏完善的监测系统和全面的监测信息,尚未形成满足实行最严格水资源管理制度要求的监测、计量和信息管理能力,在一定程度上制约了制度的落实.通过分析加强水资源监控能力建设的必要性,提出了建立水资源信息“全国一本账”的理念,研究了水资源监控能力建设功能需求,探讨了其支撑“三条红线”管理的实施策略等.     

管道无压流的过流能力研究

利用数学极值理论分析了管道无压流最大过流量、最大流速的发生工况,并建立了最大过流量、最大流速与管线纵坡、管径、管道糙率的关系表达式,为管道设计提供参考和依据。     

智能电网IT能力成熟度模型及其模糊综合评价研究

运用模糊评价理论和方法,构建了基于模糊综合评价方法的智能电网IT能力评价模型．对西部某省电网公司进行IT能力评价,对结果进行探讨,指明企业IT能力所处的等级及IT能力改进的方向．所提供方法对智能电网企业实施IT能力建设具有重要参考价值．