一种基于CST技术的机翼参数化描述方法

为了确保翼型性能，需要采用恰当的翼型参数化方法生成所需要的翼型几何体。利用CST方法生成具有代表性的Clark-Y二维机翼，同时对CST方法生成三维几何体进行了详细研究。在原有的CST方法基础上对生成三维机翼的方法进行改进，用来解决机翼外形不连续变化的情况，生成可控分段变化三维机翼外形，控制效果良好。     

因素空间理论下基点分类算法研究

目前，基于因素空间理论的背景基提取算法计算过程复杂，初始化必须依赖各因素极值，基点数量提取冗余等原因，未能在应用中取得很好效果。为此，结合内点判别法和知识可继承、可扩展的思想，提出一种计算简单、初始化独立、基点数量小的改进的背景基提取算法。然后，利用改进的背景基提取算法构造出一种全新的数据分类算法-基点分类算法，基点分类算法以提取每一类样本的背景基为预测模型，再通过新定义的λ-背景基，优化预测模型。数值实验表明:基点分类算法原理简单、构造难度小、分类模型泛化能力强，预测能力准确率高，同时严格的模型限定区域又能为识别新类别提供新方法。     

基于扁铲侧胀试验材料指数的岩土类别研究

阐述了岩土工程勘察中岩土类别的划分情况,由于岩土体的复杂性和天然成因,其物理力学性质具有差异性和区域性,采用扁铲侧胀试验对其进行岩土类别的划分,需要建立区域性岩土参数的岩土材料分类公式。通过室内试验数据和扁铲侧胀试验,据现行国家规范提出的材料指数公式,总结了武汉地区岩土类别的划分规律和相关关系,以促进扁铲侧胀技术的推广应用。     

Research on image segmentation of Miao costume patterns based on the RSKP-UNet model北大核心CSCD

The Miao nationality is the sixth largest ethnic group in China which has a history of thousands of years. It has created a unique material culture and spiritual culture in its development process and the Miao costume is a highly condensed collection of the material and spiritual culture of the Miao nationality. As one of the unique symbols of Miao culture the Miao costume has profound cultural heritage and cultural connotations. The patterns of the Miao costume are particularly eye-catching as they not only symbolize the wisdom of the Miao people in thousands of years of production and life but also symbolize the pursuit of the good spirit of the Miao people. However under the impact of modern pop culture and foreign culture these cultural symbols are gradually disappearing. In order to protect and inherit them the Miao costume pattern segmentation has become the most important work. However the Miao costume pattern segmentation is quite difficult. At present there are few studies on the extraction classification identification and preservation of the features of Miao costume pattern segmentation. With the excellent segmentation performance of the U-Net model and the advantages of easy deployment the paper improves the basic structure of the U-Net model and proposes a Miao costume pattern segmentation algorithm based on the RSKP-UNet Residual Selective-Kernel Parallel U-Net model. The algorithm adds Residual modules in the encoder part of the U-Net model to improve the feature extraction capability of the model and embeds the SKNet modules and ParNet modules in the decoder part to enhance the feature expression capability of the model. The paper uses evaluation metrics to measure the segmentation performance of the model and compares it with four segmentation models based on deep learning. The paper not only combines the current research focus-deep learning and attention mechanism but also introduces the Lovász-hinge loss function to effectively solve the problem of class imbalance in the Miao costume patterns. The RSKP-UNet model is better than other models in various segmentation indicators. Compared with the benchmark model U-Net the Dice coefficient IoU precision recall and accuracy are improved by 6. 98% 11. 07% 2. 89% 6. 75% and 3. 92% . The segmentation algorithm proposed in this paper realizes the extraction of the element content of the Miao costume patterns through image segmentation of Miao costume patterns which can be used to build the Miao costume pattern database in this way thus helping designers relevant researchers and organizations to provide research foundation and completing the protection and inheritance of the Miao costume culture. The paper also provides some reference for the segmentation research of other minority costume patterns. © 2022 Authors. All rights reserved.     

贵州省岩溶地基类型及其稳定性分析方法

岩溶是一个极为复杂的地质问题,在岩溶地基上建筑,地基的稳定性是必须要解决的工程技术问题,不同岩溶地基类型,其稳定性分析方法也不一样。该文针对不同岩溶地基类型,结合贵州部分工程实例,推荐几种适用于贵州岩溶地基稳定性分析的方法。     

成都市综合交通枢纽邻接区交通网络优化研究

城市综合交通枢纽是现代城市中最重要的客流集散中心,其邻接区极易出现人群及车辆混杂拥堵等情况,从而影响枢纽乃至整个城市交通系统的正常运行,所以优化枢纽邻接区交通网络以保证枢纽的服务效率与水平极为重要。文章以成都四大枢纽站为例,建立空间句法导向下的枢纽邻接区城市地铁交通网络、城市道路交通网络的拓扑关系模型,通过整体集成度、平均深度、连接度等参量进行宏观及微观层面的分析,对交通网络的可达性、中心性、渗透性等进行评价,并在此基础上提出针对四大枢纽邻接区交通网络的优化建议,指导枢纽邻接区的空间发展。     

浅谈幕墙、门窗施工中控制高处坠落安全事故的长效管理机制

高处坠落事故位列建筑安全事故类别的榜首.预防高处坠落事故是建筑幕墙、门窗企业安全生产管理重中之重的工作之一.在幕墙、门窗施工安全生产过程中,预防幕墙、门窗施工发生高处坠落事故是我们一直在努力做的工作.     

振冲置换法处理衡运大厦液化地基

结合工程实例,按照《建筑抗震设计规范》(GB50011—2001),较为详细地分析了饱和地基在地震时产生液化的原因、地基土地震液化的判别、液化指数的计算、液化等级的划分、地基液化的处理方法和振冲置换法的设计。用载荷试验方法对单桩允许承载力进行了检测和沉降观测,采用静力触探和标准贯入对碎石桩处理液化土层的效果进行了检验。结果表明,采用振冲置换处理饱和地基,改善原地基土的力学性质,液化地基处理效果良好,提高了地基土的整体承载力,减少了沉降量。