BIM技术在装配式内装设计中的应用

阐述了装配式装修的概念、优势和BIM技术在装配式装修行业的应用现状。结合BIM软件,从族库建立、参数化建模、碰撞检查、施工图出图、工程算量等方面提出了装配式装修设计的技术路线。以全装配式装修研发实验房项目为例,详细介绍了装配式装修BIM设计过程,验证了技术思路的可行性与合理性,为推动BIM技术在装配式装修行业的应用提供理论方法、技术思路和实例参考,对BIM技术在装配式装修行业的发展提出政策建议。     

基于蝗虫优化算法变论域模糊PI的PMSM矢量控制

永磁同步电机是一个多变量、强耦合、非线性和变参数的复杂控制对象,采用传统的PI控制很难满足现代工业的控制要求。为了获得较好的控制性能,在标准模糊PI控制的基础上,提出了一种蝗虫优化算法和变论域模糊PI相结合的控制方法。首先,介绍了蝗虫优化算法和变论域模糊PI控制的基本原理;然后,阐述了蝗虫优化算法变论域模糊PI转速控制器的设计过程,根据系统偏差在线调整模糊控制的论域;最后,搭建了基于dSPACE的永磁同步电机矢量控制系统的半实物平台,对提出的控制方法进行了实验验证。结果表明,相比于标准模糊PI控制,所提出的控制方法提高了系统的动态响应速度和鲁棒性。     

Upgrading Computational Design

Shajay Bhooshan heads up the computation and design ZHACODE group at Zaha Hadid Architects (ZHA) and is a course master at the Architectural Association Design Research Laboratory (AADRL). Here he argues that Parametricism 2.0 has a vital role to play in the progressing of computational design. Assimilating the exploratory developments of the last 15 years, he asserts how the next phase of Parametricism will enable a further consolidation and evolution of digital practices.     

Parametric Regionalism

Philip Yuan , Founding Director of Shanghai-based firm Archi-Union Architects, applies parametric techniques to his design and research in China. Here he explains how Parametricism can provide a highly adaptive and open approach to architectural knowledge and spatial organisation, accommodating regional variations in culture and environment, through an emphasis on local climate, materials and craft traditions.     

Laboratory Bioassays of Vegetable Oils as Kairomonal Phagostimulants for Grasshoppers (Orthoptera: Acrididae)

Vegetable oils have kairomonal attractant properties to grasshoppers primarily due to the presence of linoleic and linolenic fatty acids. These fatty acids are dietary essentials for grasshoppers and, once volatilized, can be detected by the insects’ olfactory receptors. A laboratory bioassay method has been developed to identify vegetable oils that have fatty acid profiles similar to grasshoppers and that induce grasshopper attraction and feeding. Such oils could be useful kairomonal adjuvants and/or carriers for acridicide formulations. Three sets of laboratory bioassays demonstrated that the addition of a standard aliquot of different vegetable oils resulted in varying degrees of grasshopper feeding on otherwise neutral substrates. Addition of olive oil stimulated the greatest feeding in all three sets of assays, regardless of the age of the tested insects. Furthermore, addition of canola or flax oils markedly enhanced grasshopper feeding. These three oils—i.e., olive, canola, and flax oil—proved to be the best performing grasshopper stimulants. A second group of oils included rapeseed-flax mix and rapeseed oils; however, their performance was not as consistent as oils in the first group—especially with regard to nymphal feeding. A third group of oils consisted of soybean, corn, peanut, and sunflower oil. Theoretical expectations regarding these oils varied wildly, suggesting that the results of a single bioassay should be cautiously interpreted as being negative.     

Mobile Agent的两种安全机制

安全性在电子交易系统中是一个至关重要的问题，该文对传统的电子商务和基于MobileAgent的电子交易的安全问题进行了比较，提出了在Grasshopper平台下采用时间限制的黑箱安全机制和加密跟踪的方法扩展平台本身的安全性，确保了Grasshopper平台在实现电子交易过程中整个系统的安全性。     

以形状文法为导向的参数化传统纹样设计技术研究

目的 将现代参数化生成技术融入传统纹样设计方法,以此弥补传统的纹样设计方法对设计结果可控性低、产出效率低的不足,从而探索传统纹样创新设计的新途径。方法 运用模件系统理论和图谱量化法提取传统纹样的文化基因图案,采用Grasshopper参数化工具重构纹样,并将形状文法推演规则转译为参数化语法表达的形状文法推演规则,运用系统的文法规则控制感性随意的纹样参数衍生流程,实现基于形状文法导向的参数化纹样设计方法。结果 以黄梅挑花八角莲纹为例,编写形状文法控制的纹样衍生参数化程序,生成多种八角莲纹衍生图案,并应用于不同的文创载体。结论 参数化设计逻辑下的形状文法可以更高效地挖掘传统文化纹样的创新设计价值,以形状文法为导向的参数化技术可灵活并科学地对传统纹样进行再设计,为数字化时代下非物质文化遗产的保护和传承提供参考。     

基于改进的蝗虫优化算法的红细胞供应预测方法

当前国内“血荒”问题比较严峻,血站与用血单位之间存在着血液供不应求的现象。针对这个问题,提出了一种基于改进的蝗虫优化算法的LSTM预测方法,用于对未来的红细胞供应情况进行预测,为血站工作人员在制定采血计划以及制备计划时提供有效的指导。该预测模型通过使用长短期记忆网络(Long-Short Term Memory Network,LSTM)来捕捉历史红细胞库存数据之间的潜在规律,以达到对未来的供应情况进行预测的效果。首先,针对蝗虫优化算法容易陷入局部最优、收敛速度较慢的问题,通过加入基于折射原理的反向学习机制与混沌映射,加快蝗虫优化算法的收敛速度,使其具备更强的搜索能力。其次,为提高LSTM的预测性能,将改进的蝗虫优化算法与LSTM相结合,并使用某地区的红细胞库存真实数据作为实验数据,用于验证改进的LSTM预测模型的性能。与标准LSTM相比,所提方法的MAE,MAPE,RMSE分别降低了39.8278,1.10%,55.8191。实验结果证明,提出的方法具有较高的可靠性。     

南宁机场参数化设计应用介绍

南宁吴圩国际机场新航站楼项目的屋面幕墙形式复杂、造型独特.屋面幕墙工程及其相关系统的设计、深化与优化的过程中,大量应用了参数化技术.在三维建模软件“犀牛(Rhinoceros)”和参数化插件“草蜢(Grasshopper)”组合平台之上,笔者编写了实现“屋面网格生成与优化”的若干“功能模块”.自动化的流程替代了手动操作,大大提高了优化效率.     

Design Data for Three-Lobe Bearings

Three-lobe bearing design data, which include both static and dynamic characteristics, are presented for laminar as well as turbulent regimes of operation. The results have been computed for ellipticity ration δ = 0.5, aspect ration λ = 1/3, 1/2, 2/3, and 1, and Reynolds numbers Re = 0, 3000, 6000, 9000, and 12000.