扣件式钢管满堂支架在3#排洪渠现浇箱涵施工中的应用

文章简介了厦门海沧港区3#排洪渠下游段现浇钢筋混凝土箱涵暗渠的模板支架的设计与施工,重点介绍了扣件式钢管满堂支架的应用。     

浅谈光伏系统配套之光伏防雷汇流箱

湖南普天科比特电子科技有限公司(以下简称"科比特")多年来一直致力于防雷产品的研制、开发和生产。如今紧跟时代步伐,大举进军太阳能光伏防雷行业,研制并生产出具有多项专利技术的KBT-PVX系列光伏防雷汇流箱。本文对此汇流箱在实际应用中可以解决的问题及产品优势作了详细介绍。科比特将再接再厉、解决更多核心技术问题,为光伏防雷行业的可持续发展努力拼搏。     

Numerical simulation of mixed convective 3D flow of a chemically reactive nanofluid subject to convective Nield's conditions with a nonuniform heat source/sink

The present investigation aims to explore the influence of a mixed convection and nonuniform heat source/sink on unsteady flow of a chemically reactive nanofluid driven by a bidirectionally expandable surface. Convective heat transport phenomenon is used to maintain the temperature of the surface. Moreover, zero mass flux is also accounted at the surface such that the fraction of nanomaterial maintains itself on strong retardation. The governing nonlinear set of partial differential equations is transformed into a set of ordinary differential equations via a suitable combination of variables. The Keller‐Box scheme has been incorporated to make a numerical inspection of the transformed problem. The spectacular impacts of the pertinent constraints on thermal and concentration distributions are elucidated through various plots. Graphical outcomes indicate that the thermal state of nanomaterial and nanoparticles concentration are escalated for elevated amounts of Biot number, porosity parameter and nonuniform heat source/sink constraints. Furthermore, it is also seen that escalating amounts of unsteady parameter, temperature controlling indices, Prandtl number, and expansion ratio parameter reduce the thermal and concentration distributions. Numerical results for the rate of heat transference have been reported in tabular form. The grid independence approach is used to verify the convergence of the numerical solution and the CPU run time is also obtained to check the efficiency of the numerical scheme adopted for finding the solution.     

Optimization of Supercritical Extraction of Linalyl Acetate from Lavender via Box‐Behnken Design

Essential oil was extracted from lavender using supercritical carbon dioxide by means of a newly developed periodic static‐dynamic (PSD) procedure and the conventional semicontinuous (SC) technique. Applying GC‐FID analysis in conjunction with Box‐Behnken design, an optimum overall extraction yield (94.4 %) was obtained via PSD in contrast to 90 % for the SC method. The results indicate that supercritical fluid extraction is a viable technique for separation of constituents such as linalyl acetate, linalool, fenchone, and camphor for pharmaceutical and medicinal applications. Furthermore, a substantial reduction of energy consumption and solvent consumption is achieved with the developed PSD process compared to the conventional SC method.     

矢量字体在机顶盒上的实现与应用

矢量字体是一种优秀的文字显示技术,详细介绍了如何结合硬件资源实现机顶盒上矢量字体的呈现与变换.     

ZD3075新型等厚筛机的设计与研究

从等厚筛机理论入手 ,论述了ZD3 0 75新型等厚筛机的优点 ,并对该类型筛机的结构进行了可靠性、合理性分析。从理论和实践两方面论证了新型等厚筛机的结构、生产率、筛分效率等各项指标都领先于普通等厚筛分机械     

硬盘机在消费电子产品中的应用

随着消费电子产品数字化与网络化的快速进展,硬盘机在这个产品领域的应用正在扩展之中。从最初的个人录像机到现今的高级机顶盒等等,硬盘机的应用极大地丰富了这类产品的功能,并在一定程度上改变了人们享受节目内容的方式。     

高强快干稳定淀粉粘合剂的研制

介绍一种高强快干稳定淀粉粘合剂的制备方法，并对其配方和工艺进行了讨论，通过比较，其经济和技术指均优于同类产品。     

军用包装箱扩大树种环境试验研究

通过对我国森林资源丰富的浙江马尾松、福建马尾松、云南松与东北红松制作的军用包装箱在四川江津、海南万宁、黑龙江漠河试验站的库内、棚下长期贮存试验，对比考核典型气候对其包装防护性能的影响，结果表明：三种马尾松代替红松作为枪械、弹药包装箱用材在技术上可行，拓宽了我国军用包装箱用材的树种。     

大跨度边支撑现浇混凝土空心楼盖篮球馆主体结构设计

本文结合实际工程,着重介绍了大跨度边支撑现浇混凝土空心楼盖的方案选型、计算方法、受力形态、挠度验算以及构造措施,总结了同类型项目设计中需注意的地方,并提出设计建议。