摘要：论文主要研究构建湘西传统木作技艺基因谱系的方法及应用策略。文章通过分析湘西传统木作技艺分类及现状,运用文化基因的分类方法,将湘西传统木作分为技艺谱系和装饰谱系,并以湘西木作为例探索传统技艺的创新方法及应用策略,通过基因谱系图的构建,将传统工艺文化进行系统地归纳,探究了文化资源向文本资源转化方法,为传统技艺的传承与创新提供新的思路与方法。

摘要：数字化设计技术是实现建筑节能设计的关键技术,建筑节能设计关键是面向设计过程、动态平衡与能耗构成分析。在建筑设计方案设计前期,通过数字化技术定量化分析当地气候、地形等因子,建立"虚拟建筑"模拟建筑物使用情况,实现对建筑设计方案中的关键问题进行科学定量分析,从而达到及时优化设计方案,科学指导节能设计的目的;同时,通过研究探索出基于数字化技术的建筑节能设计程式,以适应在新的时代背景下对建筑节能设计提出的更高要求。

摘要：In maxillofacial surgery, there is a significant need for the design and fabrication of porous scaffolds with customizable bionic structures and mechanical properties suitable for bone tissue engineering. In this paper, we characterize the porous Ti6Al4V implant, which is one of the most promising and attractive biomedical applications due to the similarity of its modulus to human bones. We describe the mechanical properties of this implant, which we suggest is capable of providing important biological functions for bone tissue regeneration. We characterize a novel bionic design and fabrication process for porous implants. A design concept of “reducing dimensions and designing layer by layer” was used to construct layered slice and rod-connected mesh structure (LSRCMS) implants. Porous LSRCMS implants with different parameters and porosities were fabricated by selective laser melting (SLM). Printed samples were evaluated by microstructure characterization, specific mechanical properties were analyzed by mechanical tests, and finite element analysis was used to digitally calculate the stress characteristics of the LSRCMS under loading forces. Our results show that the samples fabricated by SLM had good structure printing quality with reasonable pore sizes. The porosity, pore size, and strut thickness of manufactured samples ranged from (60.95± 0.27)% to (81.23±0.32)%,(480±28) to (685±31)μm, and (263±28) to (265±28)μm, respectively. The compression results show that the Young’s modulus and the yield strength ranged from (2.23±0.03) to (6.36±0.06) GPa and (21.36±0.42) to (122.85±3.85) MPa, respectively. We also show that the Young’s modulus and yield strength of the LSRCMS samples can be predicted by the Gibson-Ashby model. Further, we prove the structural stability of our novel design by finite element analysis. Our results illustrate that our novel SLM-fabricated porous Ti6Al4V scaffolds based on an LSRCMS are a promising material for bone implants, and are potential

摘要：为了获得转速优化旋翼桨叶的最优气动外形,采用自由尾迹方法计算旋翼入流,以叶素积分法计算桨叶气动力,建立了旋翼气动分析模型,为了保证计算精度及效率,旋翼配平计算采用了二次配平方法。首先分析了不同桨叶气动外形参数对旋翼性能的影响,再利用遗传算法,以悬停效率和前飞需用功率为目标,对转速优化旋翼桨叶的气动外形进行优化设计,得出了转速优化旋翼桨叶的最优气动外形方案。在最优方案的基础上,采用区间因子法分析桨叶外形参数变化对旋翼效率影响的敏感度,根据敏感度值验证了方案的最优性。最后根据设计的最优桨叶气动外形方案,研制了桨叶试验模型,进行了风洞吹风试验,试验结果表明最优桨叶气动外形能使转速优化旋翼的悬停与前飞性能指标达到理论预期值,从而验证了转速优化旋翼桨叶最优气动外形设计的有效性。

摘要：卫星舱外设备由于热容较小,所处的空间热环境复杂,热控设计难度较大。本文基于神经网络算法,建立了以星外设备热控设计参数为输入、设备温度为输出的BP神经网络模型。经过训练后的神经网络模型对样本数据的温度预测误差在1%左右,对新设计的热控参数预测误差在2%左右,表明所建立的BP神经预测温度模型精度高、稳定性强。通过所建立的神经网络模型对设备的热控参数进行了敏感性分析,分析结果表明支架的长度和支架安装面的传热系数对设备一轨内的最高温度影响更大。

摘要：如何集成单元系统实现信息和功能共享是当前亟待解决的问题。为此,提出了基于面向服务中间件的集成化计算机辅助工艺设计系统,将分布在各类网络中的中间件实例作为异构系统的连接器,支持多种服务发现和调用协议。针对异构网络或系统,采用特定的服务发现和调用协议,从而克服异构系统交互协议的异构性问题,实现多种行业领域计算机辅助工艺设计系统之间,以及计算机辅助工艺设计系统与计算机辅助设计、计算机辅助制造、企业资源计划等异构单元系统的信息与功能集成。

摘要：充分挖掘设计案例中蕴含的规律以提升产品研发效率和质量,是复杂产品设计企业持续研究的关键问题之一.跳出多学科设计优化的传统思维方式,从知识应用角度出发提出一个产品快速优化设计方案:以源于设计方案的关键参数矢量为基础,通过求解输入/输出参数之间的关系完成权值设计,基于专家经验及设计目标实现快速聚类分析,通过类内参数延拓和抽样完成参数的高覆盖、合理化设计,采用试验设计的方法为计算复杂度约束的优化设计提供高质量初始解,对全排列的其他样本进行基于知识的评估以快速筛选较优方案进行仿真.实验结果表明了本方法的有效及可操作性.

摘要：目的:核主泵轴向力过大容易造成水润滑轴承磨损,因此在保证扬程和效率性能的同时需要降低核主泵轴向力。本文旨在建立目标性能与叶轮几何形状的函数关系,探究基于伴随求解的扭曲叶轮的变形方案,在保证扬程不变的条件下同步优化叶轮的轴向力和效率,并找到影响该综合性能的叶轮关键区域。创新点:1.提出一种同步改进多个目标性能的叶轮形状优化方法;2.将伴随求解和径向基函数网格变形相结合以实现核主泵叶轮三维曲面优化。方法:1.通过理论分析,建立基于径向基函数网格变形的伴随优化方法,并在开源平台编写迭代程序;2.通过公式推导,构建扬程、效率和轴向力对应的目标函数(公式(19)^(21)),并运用正交实验确定各个目标函数的参数因子;3.通过迭代计算,在保证扬程不变的条件下实现轴向力和效率的同步优化,确定影响该综合性能的关键区域(图8),并获得叶轮的改进设计方案;4.通过流场分析,对比改进前后流场内部的压力和流速分布情况(图9和10),并验证改进方案的可行性和有效性。结论:1.与传统的随机算法相比,该优化方法直接沿梯度方向进行迭代优化,可以避免使用大量样本数据来寻找优化路径;2.该优化方法将伴随求解和径向基函数网格变形相结合,实现了流场计算和结构变形的自动化,可以保证流场网格光滑高效地更迭;3.叶轮靠近出口边的下半部分是同步优化核主泵轴向力和效率的关键区域。

摘要：Personalized microblog recommendations face challenges of user cold-start problems and the interest evolution of topics. In this paper, we propose a collaborative filtering recommendation algorithm based on a temporal interest evolution model and social tag prediction. Three matrices are first prepared to model the relationship between users, tags, and microblogs. Then the scores of the tags for each microblog are optimized according to the interest evolution model of tags. In addition, to address the user cold-start problem, a social tag prediction algorithm based on community discovery and maximum tag voting is designed to extract candidate tags for users. Finally, the joint probability of a tag for each user is calculated by integrating the Bayes probability on the set of candidate tags, and the top n microblogs with the highest joint probabilities are recommended to the user. Experiments using datasets from the microblog of Sina Weibo showed that our algorithm achieved good recall and precision in terms of both overall and temporal performances. A questionnaire survey proved user satisfaction with recommendation results when the cold-start problem occurred.

摘要：目的通过京剧脸谱文化元素在女红盒设计中的应用,探索传统文化的当代演绎与创新形式。方法通过分析京剧脸谱中的图形和色彩元素,解析京剧脸谱中所蕴含的情感与寓意,探索京剧脸谱文化的创新方法。通过女红盒设计案例,验证了京剧脸谱文化在设计中应用的可行性。结论将京剧脸谱元素与女红盒设计融合,为当代女红盒赋予了新的形式,为传统文化的当代传承与创新探索了可行的路径和方法。