延迟光照算法对Hadoop集群渲染系统的改进与实现

针对集群渲染系统在三维场景文件输出过程中,海量数据处理以及存储的问题,利用Hadoop框架对现有系统进行分布式模型改造,以基于延迟光照算法的处理方式,对分布式存储和计算的业务逻辑结构部署,实现改进Hadoop集群渲染系统对任务的处理策略,提供高容错、可靠的存储和海量计算数据的方式.通过实验证明改进的Hadoop集群渲染系统可以提高系统利用率和任务处理能力.     

红灯信号渐消方式对时距估计和情绪体验的影响

目的通过调整红灯信号的渐消方式来缩短行人对红灯时长的时距估计,提升情绪水平,创造更好的人机互动体验。方法实验通过口头估计法对红灯刺激信号的形状、消减速度和分割数目/频率不同水平的测试,来研究被试的时距估计和轻松值反馈。结果发现形状和速度的主效应显著,倒梯形和减速消减在诸多形状与速度水平中能够创造最短的时距估计及轻松值,而矩形和匀速消减表现最差。且相比刺激的外框形状变化,分割数目变化带来的视觉单元面积变化并不能显著影响时距判断。结论刺激的3种因素以及因素间的关联程度对被试的时距估计和情绪水平产生显著的影响。     

构建基于校园网环境下的共享数据存储空间

通过对设计艺术学科各类教育、教学资源和学生电子作品等多媒体文件在保存、传播、使用中存在问题的分析,结合当前文件传输和网络存储的发展现状,阐述了基于校园网环境下构建共享数据存储空间的实现过程。     

[Poly(styryl)phenanthroline]palladium as heterogeneous catalyst for heck arylation using iodobenzene

The effects of different bases on Heck arylation catalyzed by the polymeric catalyst

have been studied. The yield of product and the lifetime of the catalyst are influenced by the nature of the base used. The leaching of palladium from the polymeric catalyst is caused mainly by the competitive complexation of the ligands existing in the reaction media towards the metal. When tributylamine is replaced by DMF-H₂O-NaOAc, the catalyst can be easily recovered and reused, the yields are higher and the products are found to be more pure. For the reaction of acrylamide with iodobenzene, even after ten consecutive runs the recovered catalyst still has high catalytic activity. In the DMF-H₂O-NaOAc system, the catalyst can also tolerate the presence of a variety of functional groups; acrylamide could be introduced to react with substituted iodobenzenes in good yields.     

浅谈木质家具用胶黏剂的发展趋势

介绍了木质家具用胶黏剂的变化和发展趋势,重点综述了改性三醛胶(脲醛树脂胶黏剂、酚醛树脂胶黏剂和三聚氰胺-甲醛树脂胶黏剂)、高性能水性聚氨酯胶黏剂、再生资源类胶黏剂、热熔树脂胶黏剂的研究进展和发展趋势。     

Fibrous porous mullite ceramics modified by mullite whiskers for thermal insulation and sound absorption

In order to meet the demand for thermal insulation and sound absorption, fibrous porous mullite ceramics (FPMC) with high porosity and an interconnected pore structure were prepared, followed by a pore structure modification with in situ grown mullite whiskers on the three-dimensional framework of the FPMC. The resultant hierarchical material exhibited superior sound absorption performance in the low-to-medium frequency to most reported sound-absorbing materials, as well as a sufficient compressive strength of 1.26 MPa with low thermal conductivity of 0.117 W·m^?1·K^?1. Moreover, the effects of solid content and mullite whiskers on the microstructure and physical properties of the material were analyzed. The increase of solid content led to increased compressive strength and thermal conductivity and decreased frequency corresponding to the first sound absorption peak. The thermal conductivity and compressive strength of the material increased as the mullite whiskers grew, while the median pore size decreased.     

数字技术赋能下的德化窑瓷雕技艺活化与再生研究

目的 在数字技术赋能下,对德化窑瓷雕技艺进行活化与再生,更好地对德化窑瓷雕技艺进行保护与传承。方法 以德化窑瓷雕技艺为研究对象,将德化窑瓷雕技艺与现有的数字技术手段进行结合,探讨数字技术赋能下的德化窑瓷雕技艺活化与再生的具体内容。首先厘清德化窑瓷雕技艺发展脉络及研究现状,构建研究框架;其次在分析数字化技术在德化窑瓷雕技艺中适用性的基础上,依据德化窑瓷雕技艺保护与传承的特点,有针对性地从数据采集记录、数字知识转化、数字展示传播、数字形态再生四个维度对德化窑瓷雕技艺活化与再生展开具体研究。结论 其为德化窑瓷雕技艺主体及器物客体的数字化保护活化与创新再生增加新的内涵;也为相关非物质文化遗产(特别是传统技艺类项目)的有序传承、科学保护提供理论研究借鉴。     

罗汉松种子总黄酮提取工艺优化及抗氧化活性

目的 采用响应面法优化罗汉松种子总黄酮超声提取工艺，并考查总黄酮的抗氧化活性。方法 基于单因素试验，以料液比、超声时间、超声温度为自变量，以总黄酮得率和DPPH自由基的清除率为因变量，采用三因素三水平的响应面分析法，确定最佳提取工艺条件。结果 得到最佳工艺参数：在超声频率为40 kHz、超声功率为200 W时，料液比（g/mL）为1∶50、超声温度为70℃、超声时间为2.7 h，其理论预测值总黄酮得率为27.54mg/g(n=3，相对标准偏差为1.63%)。当添加稀释10倍的总黄酮提取液0.50mL时，对DPPH自由基的清除率达到87.2%、对Ce（Ⅳ）还原率达到84.2%；当添加稀释10倍的总黄酮提取液0.90mL时，对OH自由基的清除率为88.1%。结论 采用响应面法优化得到的超声波辅助提取工艺稳定、可靠，可用于罗汉松种子总黄酮的提取。罗汉松种子总黄酮可作为优良的天然抗氧化剂资源。