摘要：Prevailing tissue degeneration caused by musculoskeletal maladies poses a great demand on bioscaffolds,which are artificial,biocompatible structures implanted into human bodies with appropriate mechanical *** advances in additive manufacturing,i.e.,3D printing,facilitated the fabrication of bioscaffolds with unprecedented geometrical complexity and size flexibility and allowed for the fabrication of topologies that would not have been achieved *** our work,we explored the effect of porosity on themechanical properties of a periodic cellular *** structure was derived from the mathematically created triply periodic minimal surface(TPMS),namely the Sheet-Diamond ***,we employed a series of software including MathMod,Meshmixer,Netfabb and Cura to design the ***,we utilized additive manufacturing technology to fabricate the cellular structures with designated ***,we performed compressive testing to deduce the mechanical properties of each cellular *** showed that,in comparison with the highporosity group,the yield strength of the low-porosity group was 3 times higher,and the modulus was 2.5 times *** experiments revealed a specific relationship between porosity and Young’s modulus of PLA-made Sheet-Diamond TPMS ***,it was observed that the high-and low-porosity structures failed through distinctive mechanisms,with the former breaking down via buckling and the latter via micro-fracturing.

摘要：为解决包装印刷品生产过程中喷涂二维码的残缺、重复和缺失等质量问题,基于机器视觉技术设计一种二维码在线实时检测系统。通过相机、镜头、光源、色标传感器、编码器、滑台模组和控制器的合理选型完成系统硬件搭建,使用可编程逻辑控制器结合色标传感器和编码器对二维码进行实时定位,配合光源利用工业相机实现二维码的在线图像采集,并基于数字图像处理技术完成采集图像预处理。使用Visual Studio平台进行上位机软件开发,实现图像采集、图像预处理、二维码识别、缺陷检测与分类等功能。系统最高二维码识别速度7个/s,对错印、漏印和重码等缺陷问题误检率<0.05%,能够满足设计要求。研究为二维码在线检测系统开发提供借鉴。

摘要：地震诱发的边坡失稳是一种重要的地震地质灾害类型,本文结合工程实例,利用有限差分软件FLAC3D建立了一个边坡的数值分析模型。对比分析了静力状态下锚固前后边坡的塑性区、水平位移和滑移面,地震作用下锚固前后边坡的塑性区、各个时刻的水平位移、锚杆轴力分布和塑性状态,然后分析了边坡的稳定性,并探讨了边坡破坏的机理。数值分析结果表明:锚杆对边坡的加固效果十分显著;锚杆在发挥锚固作用时主要受拉,且随着锚杆位置高程的增加,锚杆的轴力减小;有无锚杆支护的边坡在地震作用下的破坏方式不同。研究结果为锚固边坡的抗震设计提供了参考依据。

摘要：基于空气动力学和理论力学等理论知识,严格按照竞赛要求,以滑翔机的气动性和稳定性研究为核心。从模型布局、载荷助推滑行的力学过程等方面考虑,优化了滑翔机机头的形状,增加楔形块,探明机翼最优迎角,确定配重块的合理布局形式。通过试飞试验和手掷模型试验结果,设计并优化了火箭助推载重滑翔机参赛模型,最终获得了浙江省第六届大学生力学竞赛一等奖。

摘要：以2,6-吡啶二甲酸、乙二胺、水杨醛等为原料,经缩合反应,设计合成了双Schiff碱仲胺配体(L),采用荧光光谱考察了该类受体对数种常见金属离子的响应能力。其中与K+、Pb 2+金属离子配位后体系荧光强度明显增强,表明主体分子(配体)对这两种离子有很强的识别性。通过对K+离子的荧光滴定实验,发现L与K+在1~5μmol/L有较好的线性关系,线性方程为:F-F 0=628.09572-7.1719 C,相关系数为R 2=0.99501。