面向数据流结构的指令映射优化方法

在高性能计算领域,数据流是一类重要的计算结构,也在很多实际场景表现出很好的性能和适用性。在数据流计算模式中,程序是以数据流图来表示的,数据流计算中一个关键的问题是如何将数据流图映射到多个执行单元上。通过分析现有数据流结构的指令映射方法及其不足,提出了基于数据流结构的新型指令映射优化方法。主要是根据多地址共享数据包的特性对指令映射方法进行优化,延迟多地址共享数据路由包的拆分,减少网络拥堵。     

Investigation of creep behavior of 316L stainless steel produced by selective laser melting with various processing parameters

Journal of Mechanical Science and Technology - Creep behavior of 316L stainless steel was experimentally investigated using small punch (SP) specimens produced by the selective laser melting (SLM)...     

Effects of process parameters on the high temperature strength of 17-4PH stainless steel produced by selective laser melting

Journal of Mechanical Science and Technology - In this study, the effects of process parameters on the high temperature strength of 17-4PH stainless steel manufactured by selective laser melting...     

High-efficiency Silicon Solar Cells: A Review

Over the past few decades, crystalline silicon solar cells have been extensively studied due to their high efficiency, high reliability, and low cost. In addition, these types of cells lead the industry and account for more than half of the market. For the foreseeable future, Si will still be a critical material for photovoltaic devices in the solar cell industry. In this paper, we discuss key issues, cell concepts, and the status of recent high-efficiency crystalline silicon solar cells.     

立式退火炉张力设定模型及应用

带钢在立式退火炉内发生瓢曲、跑偏的临界张力与炉辊凸度、带钢规格都存在一定关系，但缺乏合理的定量分析方法，难以科学制定不同规格、不同钢种带钢的炉内单位张力。通过引入瓢曲风险因子BRI，可以定量地分析炉内板带瓢曲风险，从而确定冷硬板带炉内张力设定上限，即板带发生热瓢曲的临界张力σC，为连退炉加热段和冷却段的张力控制提供依据。采用该方法对连退炉加热、冷却区的张力进行了优化，应用结果表明，优化后的张力值与实测值更加吻合。     

Subtle variations in the structure of crosslinked epoxy networks and the impact upon mechanical and thermal properties

Presented here is an investigation of the structure–property relationships of crosslinked networks using three bi-functional glycidyl ether aromatic epoxy resins, two bi-aryl and one tri-aryl, cured with bi- and tri-aryl amines. Subtle changes to the monomer chemistry including changing aromatic substitution patterns from meta to para, methylene to isopropyl and isopropyl to ether were explored. Changing an epoxy resin backbone from methylene to isopropyl enhances backbone rigidity thus increasing glass transition temperature (T_g), yield strength, and strain despite reducing modulus. Changing meta-substitution to para increases T_g and yield strain while leaving strength unaffected and reducing modulus. Changing isopropyl linkages to ether reduces modulus, strength, T_g, and yield strain reflecting increased molecular flexibility. Using three instead of two aromatic rings increases the molecular weight between crosslinks thereby decreasing T_g and yield strain while increasing modulus and strength. Despite the complexities of multiple systems for varying epoxy resins and amine hardeners, the effect upon network properties is explained in terms of short- and long-range molecular and segmental mobility, crosslink density, and equilibrium packing density. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48874.     

徽派古民居建筑的地域文化特征

徽派建筑是中国古代社会后期成熟的建筑流派，地域文化特征极为鲜明，尤其是作为微州人生存文化最直观载体的古民居建筑，是古代徽州社会历史文化的见证。徽派古民居的选址布局深受徽州风水理论影响，尤其注重水口营造。徽派古民居的内部结构格局生动体现了徽州宗法制度及其观念形态。徽商“商而兼士，贾而好儒”的独特文化品格，成就了古民居内部装饰与陈设的独特艺术魅力。     

气提式三重循环生物膜反应器用于制药废水的处理

采用气提式三重循环生物膜反应器（TLABR）处理制药废水，稳定阶段对COD和NH4^＋-N的去除率分别为73％和70％。当温度为27～30℃、pH=8．5时，反应器内形成了稳定的NO2^--N积累。同时，考察了不同HRT下高效反应器的处理效果，探讨了pH对反应器内发生的短程硝化效果的影响以及亚硝化菌对游离氨浓度的适应性。结果表明：在HRT为3、6、9h下，对COD和氨氮的去除率分别为65．3％、73．9％、75．1％和48．9％、68．4％、72．8％；NO2^--N积累率分别为92．7％、76．2％、69．7％；反应器出水水质稳定，体现了高效性和抗冲击负荷能力。     

可注浆式橡胶止水带试验研究

本文报导采用可注浆式橡胶止水带进行防渗漏水的试验方案、步骤及数据。结果表明该试验取得预期的目的 ,有工程应用价值