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Micro-hydromechanical deep drawing of metal cups with hydraulic pressure effects

Liang LUO, Zhengyi JIANG, Dongbin WEI, Xiaogang WANG, Cunlong ZHOU, Qingxue HUANG

《机械工程前沿（英文）》 2018年第13卷第1期页码 66-73 doi: 10.1007/s11465-018-0468-z

摘要：

Micro-metal products have recently enjoyed high demand. In addition, metal microforming has drawn increasing attention due to its net-forming capability, batch manufacturing potential, high product quality, and relatively low equipment cost. Micro-hydromechanical deep drawing (MHDD), a typical microforming method, has been developed to take advantage of hydraulic force. With reduced dimensions, the hydraulic pressure development changes; accordingly, the lubrication condition changes from the macroscale to the microscale. A Voronoi-based finite element model is proposed in this paper to consider the change in lubrication in MHDD according to open and closed lubricant pocket theory. Simulation results agree with experimental results concerning drawing force. Changes in friction significantly affect the drawing process and the drawn cups. Moreover, defined wrinkle indexes have been shown to have a complex relationship with hydraulic pressure. High hydraulic pressure can increase the maximum drawing ratio (drawn cup height), whereas the surface finish represented by the wear is not linearly dependent on the hydraulic pressure due to the wrinkles.

关键词： micro-hydromechanical deep drawing microforming size effects lubrication Voronoi

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SmartPaint：一种基于生成式对抗神经网络的人机协同绘画系统 Special Feature on Intelligent Design

Lingyun SUN, Pei CHEN, Wei XIANG, Peng CHEN, Wei-yue GAO, Ke-jun ZHANG

《信息与电子工程前沿（英文）》 2019年第20卷第12期页码 1644-1656 doi: 10.1631/FITEE.1900386

摘要：当前人工智能在模仿和大批量生产设计作品中扮演重要角色（如电商广告），而在与用户合作创作时表现欠佳。人们有能力使用草图表达创意想法，但缺乏专业绘画技巧完成精美画作。已有人工智能方法无法基于用户输入草图的语义输出具有艺术美感的画作。本文开发了一种基于生成式对抗神经网络的人机协作绘画系统——SmartPaint，支持人机合作创作动漫风景画作。该系统使用动漫图像数据及其相应语义标注图、边缘检测图训练生成式对抗神经网络。通过此种方式，该系统能够同时理解动漫风格以及风景图像中物体的语义和空间关系。在使用中，用户输入草图作为语义标注图，系统自动为其合成边缘图；根据合成的边缘图生成具有恰当风格纹理的画作，从而稳定地处理多样化草图。实验证明该系统可有效满足用户创作需求，生成高质量动漫风格画作。

关键词：协同绘画；深度学习；图像生成

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Overview and problems of BIM implementation in Japan

Takashi KANETA, Shuzo FURUSAKA, Nisi DENG

《工程管理前沿（英文）》 2017年第4卷第2期页码 146-155 doi: 10.15302/J-FEM-2017007

摘要： This paper aims to overview Building Information Modeling (BIM) implementation and problems of BIM implementation in Japan. First, BIM implementation guidelines and pilot projects are introduced. Then, some popular BIM software together with typical implementation cases are provided. BIM implementation in Japan is not always encouraged via a top-down consensus in architectural firms and general contractors, as the client and architects can reduce the project risk inherent in design and drawings by transferring these tasks to a general contractor. The paper finally discusses the problems in project management to present a strategy to develop a new version of BIM that will provide value to all of the stakeholders of a project.

关键词： Building Information Modeling general contractor architect drawing procurement project management

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论编制土地利用总体规划的动力周期和特性

李伯衡

《中国工程科学》 2007年第9卷第3期页码 1-5

摘要：

编制土地利用总体规划是为全面建设小康社会提供用地保障，是国务院强化宏观调控的重要举措。为了提高土地利用总体规划的科学性和实用性，从理论上论述了推进土地利用总体规划的三大动力——粮食安全生产，经济稳定发展，生态保护、社会和谐；建议将土地利用总体规划按国民经济发展需要安排三种周期：战略规划——中长期土地规划；战役规划——五年土地规划和国家五年计划相协调；战术规划——区域土地详细规划。区域土地规划具有目的统一性、决策整体性、总量不变性、需求动态性等特征；为了建立土地利用长效机制，制止乱占耕地，建议全国人大设立枟土地利用规划法枠、枟基本农田保护法枠，用地球观测技术建立基本农田台帐，动态定位格网监管，向农民发耕地承包使用证。

关键词：土地利用总体规划建议动力周期

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Traces and echoes of De Architectura by Marcus Vitruvius Pollio in the work of Xu Guangqi in 17th century China

Michela CIGOLA,Yibing FANG

《机械工程前沿（英文）》 2016年第11卷第1期页码 3-11 doi: 10.1007/s11465-015-0359-5

摘要：

This study aims to investigate the role played by Xu Guangqi (1562–1633), minister of the Ming Dynasty, in the development of European scientific and technical knowledge in China between the 16th and 17th centuries by analyzing a book of Western technology that he wrote, namely, Taixi Shuifa (On Western Hydraulics). Several Western books related to machine knowledge are searched to trace the source of the illustrations in Taixi Shuifa. We found that Archimedes’ screw and Ctesibius’ machine, which are included in Vitruvius’ De Architectura volumes, also appear in the work of Xu Guangqi.

关键词： Vitruvius’ De Architectura Xu Guangqi’s Taixi Shuifa Jesuit missionaries Italian Renaissance drawing representation