管式振荡流反应器的流动模式研究 (II)高振荡强度下的流动模型和模拟

根据高振荡强度下的粒子成像流场可视化实验结果,在分析振荡流场中漩涡结构特征的基础上,提出用带有二次流区的全混腔室和室间返混的多釜串联模型来表征高振荡强度下的管式振荡流反应器流动特性。根据停留时间分布实验结果,运用小生境遗传算法优化求解模型参数与振荡参数之间的定量关系。模拟计算表明,优化后的模型给出的停留时间分布曲线与实验结果吻合良好。     

泥磷回收制磷危险性分析与防治

泥磷回收制磷属于化学危险品生产,由于黄磷本身的易燃特性和生产中其他因素的诱导,极容易发生泄漏引发火灾和灼伤。介绍了泥磷的产生和泥磷回收制磷的工艺特点。应用系统安全工程的原理和方法,辨识了泥磷回收制磷生产的潜在危险性;辨识了泥磷回收制磷生产过程中的物质危险性、装置危险性和工艺危险性。运用预先危险性分析法（PHA）对泥磷回收制磷的主要危险、有害因素进行分类和分级。根据对主要危险、有害因素分类和分级的结果,提出技术措施和管理措施来提高企业安全生产管理水平和预防生产性事故的发生。     

聚丙烯装置生产中细粉过多原因分析及解决措施

本文分析了球形聚丙烯装置生产中细粉过多的原因，并提出相应的解决措施。     

稳定剂对环保型无铅无镉釉上彩熔剂性能影响的研究

在碱-硼-硅系统基础熔剂中引入稳定剂，运用正交实验方法对无铅无镉釉上彩熔剂性能进行研究。通过化学稳定性、堆烧、粘度测试、印花彩烤等一系列对比试验，研究了稳定剂ZrO2、ZnO、SnO2和TiO2的最佳引入量。实验结果表明：在基础熔剂配方的基础上。稳定剂ZrO2的最佳引入量为6％；SnO2引入量不应超过5％；ZnO引入量10％为最好；TiO2引入1％的最低水平即可，8#为本研究中的最佳配方。     

墨韵陶缘——从中国画观察陶瓷绘画的变迁

中国，具有数千年历史的文明古国，在长期探索、继承、创新中创造出中国画这具有我国独特文化特色的艺术瑰宝；与中国画根出同源，富有中国民族风格的中国陶瓷绘画同样辉煌，作为陶瓷装饰的主要手段，陶瓷绘画丰富了中国绘画的历史，并伴随着中国画的成熟与发展，在陶瓷表面，利用不同的釉料和艺术手法达到一种新的美的境界。中国画与陶瓷绘画艺术结缘，引导了陶瓷绘画的历史变迁。     

Miscibility of linear low density polyethylene (LLDPE)-graft-poly(methyl methacrylate) with poly(vinylidene fluoride) (PVF2) and its application as compatibilizer LLDPE/PVF2 blends

Differential scanning calorimetry (DSC), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) were used to study the miscibility of blends of a graft copolymer of poly(methyl methacrylate) on linear low density polyethylene (LLDPE-g-PMMA, G-3) with poly(vinylidene fluoride)

1 Systematic name: poly(1,1-difluoroethylene).

(PVF₂) and the compatibilization of blends of LLDPE/PVF₂. The specific interaction between PMMA side chains and PVF₂ in G-3/PVF₂ binary blends is weaker than that between the homopolymers PMMA and PVF₂. There are two states of PVF₂ in the melt of a G-3/PVF₂ (60/40, w/w) blend, one as pure PVF₂ and the other interacting with PMMA side chains. The miscibility between PMMA side chains and PVF₂ affects the crystallization of PVF₂. LLDPE-g-PMMA was demonstrated to be a good compatibilizer in LLDPE/PVF₂ blends, improving the interfacial adhesion and dispersion in the latter. Diffusion of PMMA side chains into PVF₂ in the interfacial region reduces the crystallization rate and lowers the melting point (T_m) and the crystallization temperature (T_c) of PVF₂ in the blends.     

Product and process parameters determination for quality and cost

The purpose of this study is to conduct a concurrent product and process parameters determination for further cost reduction and quality enhancement. The process design-related parameters, such as process mean, process tolerance and product design-related parameters, such as product tolerance, are considered simultaneously in the proposed approach. To reflect the response from these three key controllable characteristics: process mean, process tolerance and product tolerance, the key measurement score, which is the sum of the mean cost, tolerance cost, quality loss and failure cost, is used to evaluate the present model. Two examples are provided for demonstrating the application of single and multiple quality characteristics.     

悬浮法合成固体粒状丙烯酸树脂

研究了悬浮法合成固体丙烯酸树脂颗粒。讨论了不同软硬单体配比对丙烯酸树脂颗粒的玻璃化转变温度、相对分子质量及其分布的影响以及不同的引发剂及悬浮剂对其聚合过程、最终产物形态及上述性能的影响。制得的丙烯酸树脂的数均相对分子质量用凝胶渗透色谱(GPC)测定为3.9×104～6.2×104,相对分子质量分布为2.04～2.32;用红外光谱图表征了制得的丙烯酸树脂结构。差示扫描量热法(DSC)测定了聚合物的玻璃化转变温度(Tg)。     

Making sky lanterns from polygonal meshes

Releasing sky lanterns is a popular way of celebrating festivals and ceremonies in the Asian countries. This paper presents a computer-aided approach to help novice users to design flyable sky lantern with desired shape. Given a closed up-right 3D model with a user-specified cutting on the bottom, our system optimizes the shape by regularizing the boundary, smoothing the geometry and improving the volume-to-area ratio to make it feasible for flying. The optimized shape is then approximated by a set of developable patches. Next, through a physical analysis step that tests the flying condition and determines the optimal size, the approximated shape is flattened into 2D patches, which can be printed out and glued together to form the airbag. Finally, the user can attach the airbag to a bamboo frame and assemble the fuel cell. We successfully apply our prototype system to design and construct real sky lanterns.     

Impacts of new technologies on media usage and social behaviour in domestic environments

Technological infrastructure at home is changing continuously and is becoming increasingly interconnected. Media devices, including the TV set, provide access to the Internet and offer manifold opportunities to consume media on demand. Additionally, personal devices, such as smartphones, also enable flexible consumption and sharing of media. Questions about how these technologies change the user's media usage and how these changes affect the social structure of a household, however, remain largely unanswered. In order to gain insight into the adoption of new technologies into daily routines, we explored these changes in respect of people's media usage in a qualitative long-term Living Lab study. We will present findings regarding personal routines, flexible integration of new devices into existing practices, influences on households as social systems and related issues in device access and collective use. We will highlight potentials and conflicts regarding device shifts and roles; restrictions in device access; social influences in the living room; and individual changes in media consumption.