摘要：First-principles calculations were performed to investigate the structures and energetics of {101n} coherent twin boundaries(CTBs) and glide twin boundaries(GTBs) in hexagonal close-packed(hcp) Ti. The formation mechanism of GTBs and their correlation with twin growth were fundamentally explored. Results suggested that GTBs can form from the gliding of CTBs, through their interaction with basal stacking fault. The gliding eventually restored the CTB structures by forming a pair of single-layer twinning disconnections. The pile-up of twinning disconnections should be responsible for the wide steps at twin boundaries as observed in high-resolution transmission electron microscopy, which can further promote twin growth. Possible effects of various alloying elements on pinning twin boundaries were also evaluated, to guide the strengthening design of Ti alloys.

摘要：为了研究进口旋流条件下涡轮导叶全气膜冷却效率特性,使用热色液晶测量了在旋流强度为0.3,旋流方向为顺时针和逆时针,冷气流量比为6.9%、7.5%和8.0%下某型高压涡轮导叶的全气膜冷却效率分布,并针对旋流影响开展了导叶气膜冷却的优化设计。结果表明:涡轮进口旋流对导叶压力面气膜冷却效率的影响较大,进口旋流使压力面中弦区域冷却效率整体降低60%左右;顺时针旋流使压力面冷气向叶根偏转,逆时针旋流使压力面冷气向叶尖偏转;通过在导叶压力面绝热气膜冷却效率较低区域增加气膜孔,可有效提升压力面气膜冷却效率,优化后压力面平均气膜冷却效率提高了50%以上。

摘要：BACKGROUND： The potential application of decellularized liver scaffold for liver regeneration is limited by severe shortage of donor organs. Attempt of using heterograft scaffold is accompanied with high risks of zoonosis and immunological rejection. We proposed that the spleen, which procured more extensively than the liver, could be an ideal source of decellularized scaffold for liver regeneration. METHODS： After harvested from donor rat, the spleen was processed by 12-hour freezing/thawing ×2 cycles, then circulation perfusion of 0.02% trypsin and 3% Triton X-100 sequentially through the splenic artery for 32 hours in total to prepare decellularized scaffold. The structure and component characteristics of the scaffold were determined by hematoxylin and eosin and immumohistochemical staining, scanning electron microscope, DNA detection, porosity measurement, biocompatibility and cytocompatibility test. Recellularization of scaffold by 5×106 bone marrow mesenchymal stem cells（BMSCs） was carried out to preliminarily evaluate the feasibility of liver regeneration by BMSCs reseeding and differentiation in decellularized splenic ***： After decellularization, a translucent scaffold, which retained the gross shape of the spleen, was generated. Histological evaluation and residual DNA quantitation revealed the remaining of extracellular matrix without nucleus and cytoplasm residue. Immunohistochemical study proved the existence of collagens I, IV, fibronectin, laminin and elastin in decellularized splenic scaffold, which showed a similarity with decellularized liver. A scanning electron microscope presented the remaining three-dimensional porous structure of extracellular matrix and small blood vessels. The poros-ity of scaffold, aperture of 45.36±4.87 μm and pore rate of 80.14%±2.99% was suitable for cell engraftment. Subcutaneous implantation of decellularized scaffold presented good histocompatibility, and recellularization of the splenic scaffold demonstr

摘要：图形创意是现代艺术设计专业教学的重要组成部分,部分高校图形创意课程的授课方式、教学理念相对传统、单一,缺乏创造思维能力和创新意识的培养。文章从现代图形设计理念和全新设计观点出发,以图形创意课程中的想象思维与联想思维、形象思维与逻辑思维、水平思维与垂直思维、逆向思维与发散思维模式为研究中心点,结合图形创意思维的整合模式,对创意思维方法、过程进行探析,以此提高“图形创意”课程的教学效果。

摘要：目的 探究情感化理论在儿童医疗产品设计中的应用方法,达到减轻患病儿童在治疗过程中产生的焦虑和恐惧心理,积极配合治疗的目的。方法 首先,用文献分析法对儿童医疗产品设计现状、儿童医疗产品的目标用户特征,以及情感化设计层次理论进行分析梳理;其次,结合案例分析,系统提炼和总结儿童医疗产品情感化设计的方法;最后,进行设计实践,佐证上述设计方法。结论 儿童医疗产品情感化设计需要对诺曼的3个层次进行系统把握,本能层设计上,从医疗产品的形态、色彩、材质和尺寸要素,整体构建愉悦感官体验;行为层设计上,用简约的功能和流程、人性化和趣味化的交互、及时的提示和反馈,共同营造良好使用体验;反思层设计上,通过产品形象象征、提升用户参与度和故事扮演的方法,系统塑造深层情感体验。

摘要：针对斜沟选煤厂在刮板输送机运行过程中采取单一的人工巡检易造成事故扩大、处理难度增加、生产延误时间长、维修成本高等问题,创新设计智能化故障报警系统,利用机器视觉和图像算法对刮板机运行进行不间断监控,实现跳链、断链、拉斜等故障的智能检测及预警;并接入集控联锁,实现故障时自动停机;最终实现提升安全生产水平、节省人力资源,提高运行效率,降低检修成本的目的。

摘要：目的建筑与工业产品的低碳设计策略有明显差异,其中由属性差异衍生出不同的设计形式。将低碳设计与对象属性的联系作为研究目标,提出在产品设计中,对象属性决定低碳设计形式的假设。方法将建筑“高技化”与产品“物联网化”进行比较研究,探明其中的联系。基于系统理论从整体性、相关性、动态性、目的性、层次性五个方面进行分析,得出两类人造物在属性上的差异。基于系统设计中的功能、输入输出、程序与层次、环境、媒介及人六个方面,最终形成六个对比因子。以此判断低碳设计与对象属性间的联系,进而解释其设计表象上的差异。结果对象属性决定低碳设计的形式。结论对象属性对“功能”“能量转换”“环境”“媒介”四个设计因子产生影响,而对“人”和“程序”两个设计因子不产生影响,设计“人”和“程序”两个因子的方法带有普适性。

摘要：针对LED日间行车灯的设计需求,提出通过热场仿真分析实现其热性能优化设计的方法。首先,根据LED日间行车灯的结构建立其有限元仿真模型,通过实验观测LED日间行车灯工作中的温度分布情况,并以实验观测结果验证仿真模型的有效性;然后,基于以上模型仿真分析日间行车灯的灯珠间距、铝基板厚度与LED灯珠结温之间的关系;以上述关系为约束条件,结合生产成本,得出在LED灯珠一定的情况下,灯珠间距为37 mm、铝基板厚度为1 mm的最优化设计方案,使LED日间行车灯能够可靠工作且成本更低。

摘要：从强化实践教学、提高教师能力、优化课程结构、提高教学质量;规范试卷与毕业设计促进教学效果、注重教学过程和整顿教学秩序促进学风养成等7个方面探讨艺术设计专业培养应用型人才的新模式。

摘要：从实际应用出发,讨论了基于三基色加性混光原理的发光二极管(LED)照明技术中涉及的混光、自适应驱动电路及相关工艺问题,提出了色彩可预置的人性化LED驱动电路,并着重阐述了该电路的设计及实现过程。