基于元数据的图书馆短信协同服务平台

选用短信DTU模块作为短信收发方式,设计并实现了一种基于元数据的图书馆短信协同服务平台。平台具有成本低、性能高、部署灵活等优点。通过元数据建模完成数据源挂接、抽取、业务逻辑、条件触发、短信构建,保证了图书馆业务数据的安全性,实现了系统移植过程中异构数据源的可复用性。     

在稀硫酸中添加硫脲对块体纳米晶纯铁腐蚀行为的影响

研究了在稀硫酸溶液中添加硫脲(TU)对块体纳米晶工业纯铁(BNII)室温电化学腐蚀行为的影响,并与普通工业纯铁(CPII)的室温电化学腐蚀行为进行了比较.结果表明:将CPII在添加TU的稀硫酸溶液中浸泡5 min,其电化学阻抗(EIS)谱图中出现感抗弧.随着浸泡时间的延长,CPII的EIS谱图表现为一非圆心下偏的半圆;而在相同的条件下,BNII的EIS谱图表现为两个时间常数的容抗弧,表明硫脲对其腐蚀行为有促进作用.动电位极化(PDP)测试结果表明,两种材料的样品均出现阳极脱附现象.     

基于80D51芯片的SIP Phone的设计与实现

给出了SIP Phone的设计框架,分析了SIP协议的基本协议过程,根据嵌入式系统资源有限和无操作系统支持的特点,设计并实现了适合于嵌入式系统的SIP协议栈结构,提出了减少代码长度和数据存储空间的优化方法.     

Polyvalence: The Competence of Form and Space with Regard to Different Interpretations

Herman Hertzberger , founder of Amsterdam-based Architectuurstudio HH, espouses the view that to be effective space needs to be flexible, organic and open to interpretation, fit for purpose in an increasingly dynamic and uncertain world. But what does this mean for architectural space? How can architecture be a sufficiently blank canvas to accommodate changes in use while retaining its meaning, quality and identity? How might a ‘polyvalent’ approach be applied in such a manner as to enable buildings to cater for the unexpected?     

Effects of turbulent combustion modeling errors on soot evolution in a turbulent nonpremixed jet flame

Due to the long time scales associated with soot evolution and its sensitivity to the background thermochemical state, even small errors in a turbulent combustion model have the potential to lead to large errors in soot evolution. For example, in turbulent jet flames, small upstream errors in the temperature and species concentrations could lead to large errors in soot volume fraction downstream. In this work, an algorithm is developed for propagating upstream errors in the thermochemical state, specifically, the temperature, into soot predictions downstream. The algorithm is based on a stochastic collocation approach that perturbs the reaction progress variable in the flamelet model at an upstream location and lets this error passively propagate downstream in the soot and combustion models (i.e., the hydrodynamic field is unaffected). The approach is applied to the simulation of Delft Flame III, a natural gas turbulent nonpremixed piloted jet flame for which both upstream temperature measurements and downstream soot volume fraction measurements are available. The results indicate that upstream errors in temperature, which are within the experimental uncertainty, can lead to errors in the soot volume fraction downstream up to 30%; the downstream error in the temperature is comparable in magnitude to the upstream perturbation. Further analysis reveals that the primary source of the downstream error in soot volume fraction is the accumulation of errors in the soot precursor mass fraction with downstream distance.     

荷兰项目式跨学科合作设计教学新实践——以代尔夫特理工大学为例

针对设计类课程的探索性、实践性、情境性,基于项目的跨学科合作教学法在荷兰已成为教育改革的趋势。本文以代尔夫特理工大学工业设计工程学院《高级实施设计》硕士学位课程为例,详细分析了其项目式跨学科合作教学设计、实施、评价的全过程。这种教学范式将知识讲授转变为项目驱动的小组合作性学习。学生从收集新的、可行的技术,共同研究和创建反映他们项目的设计知识,到成为熟练的设计沟通者和结构不良问题的解决者,充分反映了设计专业的学习规律和培养复杂性问题设计能力的教育理念。借鉴荷兰经验,本文提出了动手实践、双环创造、过程评价三点教学启示,以期为我国如何在新工科背景下开展跨学科设计教学提供借鉴。     

Geometry and New and Future Spatial Patterns

Despite architects' preoccupation with designing geometric surfaces, there has remained a gap between design and construction. The realisation of complex architectural freeform shapes and the generation of panel patterns continues to be especially challenging, limited by material and manufacturing constraints. Here, Helmut Pottmann , Head of Geometric Modelling and the Industrial Geometry Group within the Institute of Discrete Mathematics and Geometry at Vienna University of Technology (TU Vienna), explores the possibilities thrown up by new research employing fabrication-aware design software. Copyright © 2009 John Wiley & Sons, Ltd.     

Cooperative games with multiple attributes

ABSTRACT

In this paper, we introduce the notion of a cooperative game with multiple attributes where players can provide partial participations in multiple attributes and form coalitions. The power or influence of the players due to their multiple attributes is evaluated based on their memberships in the coalitions. Our game therefore, extends the notion of cooperative games with fuzzy coalitions. The Shapley function for this class of games is proposed as a rational and fair solution concept. Every fuzzy game stems out of a specific crisp game under the assumption that the players provide partial memberships in forming multiple coalitions simultaneously. We adopt similar techniques to obtain the cooperative games with multiple attributes from their crisp counterparts and subsequently determine their Shapley functions.     

太浦河一维、二维水流数值模拟比较研究

相对于太浦河洪水风险图编制的研究范围,太浦河是一条狭长的河道,河道内如采用二维水动力模型数值计算将影响洪水风险系统调用数据的效率和可视化的效果,可考虑河道内采用一维水动力模型计算.为了验证一维水动力模型是否能应用于太浦河洪水风险编制中的太浦河河道洪水演算,运用一维、二维水动力模型对太浦河河道分别进行了恒定情况和非恒定情况的洪水演算.一维、二维水流数值模型的计算结果表明:水位与断面平均流速吻合性较好.因此得出结论:用一维水动力模型在计算太浦河河道内洪水演算具有与二维水动力数学模型相当的精度,并能大大提高洪水风险系统调用数据的效率,并提高了可视化的效果.