转笼式悬浮填料生物反应器启动性能试验

为了研究转茏式悬浮填料生物反应器的启动性能，简化其启动工艺，进行了常温和变温时的反应器的自然挂膜启动实验。实验结果表明，转笼式悬浮填料生物反应器构造的特定微环境有利于自然挂膜，启动比传统生物转盘快10d以上：经过启动参数优化，在水流量为2m^3／h，曝气量为3．6m^3／h、转笼转速为1．5r／min时，启动效果较好。     

成品尿素包装质量的控制

根据生产实际概括和总结成品尿素包装质量的控制过程,提出质量控制的关键环节和控制点,对尿素包装质量进行有效控制.     

可再生的绿色能源——生物柴油

20世纪人类使用的能源主要有三种:原油、天然气和煤炭。而另一个值得重视的新能源是可再生的绿色能源——生物能。在各种可再生能源中,生物质是贮存的太阳能,更是一种唯一可再生的碳源,可转化成常规的固态、液态和气态燃料。生物燃料作物作为未来的一种新能源,与其他能源比有许多优点,环保、可再生是生物能源最大的优势。生物柴油是近年来发展迅速并规模化使用的生物替代能源。生物柴油的制备主要有酶催化、酸催化、碱催化、酸—碱催化、超临界等方法。     

硅酸盐矿物复合填充聚丙烯树脂的研究

探讨了不同种类的硅酸盐矿物、不同的用量以及之间的复合填充体系对聚丙烯树脂的物理及加工性能的影响。提出经硅烷偶联剂处理的硅灰石纤维和云母适当比例填充聚丙烯体系后，综合性能最佳。     

Using heuristic algorithms for capacity leasing and task allocation issues in telecommunication networks under fuzzy quality of service constraints

Nowadays, every firm uses telecommunication networks in different amounts and ways in order to complete their daily operations. In this article, we investigate an optimisation problem that a firm faces when acquiring network capacity from a market in which there exist several network providers offering different pricing and quality of service (QoS) schemes. The QoS level guaranteed by network providers and the minimum quality level of service, which is needed for accomplishing the operations are denoted as fuzzy numbers in order to handle the non-deterministic nature of the telecommunication network environment. Interestingly, the mathematical formulation of the aforementioned problem leads to the special case of a well-known two-dimensional bin packing problem, which is famous for its computational complexity. We propose two different heuristic solution procedures that have the capability of solving the resulting nonlinear mixed integer programming model with fuzzy constraints. In conclusion, the efficiency of each algorithm is tested in several test instances to demonstrate the applicability of the methodology.     

Sustainability in Web server systems

The exponential growth of Internet during the last decade leads us to make more efforts in the researching and developing of sustainable Web servers in order to decrease the global energy demand. In this paper, we cover, as a first step, a proper review of the literature related to the energy efficiency research in Web server systems to depict the state of the art to plan further contributions as more research in sustainable Web systems. We also propose and implement an energy metric that permits to establish a relation between the Quality of Service (QoS) obtained by the system and the power it consumes.     

HYDRODYNAMICS AND MASS TRANSFER IN A NEW TYPE (FG) STACK PACKED EXTRACTION COLUMN

1 INTRODUCTIONOne of the major objectives in the study of extraction column is to minimize column di-mensions to fulfill a certain specific separation process.This has led to the intensiveemployment of structured packings in extraction columns [1].One of the recentdevelopments targeted for greater interfacial areas without excessive dispersion is the useof structure packings contactive claiming advantages,such as lower fluid flow friction     

合成氨装置铜洗塔的技术改造

针对铜洗塔存在吸收液循环量不足等缺点,对其内件如填料、液体初始分布器和液体收集再 分布器等进行了技术改造。改造后,铜洗塔的生产能力提高20％以上。     

间歇式液相本体法生产聚丙烯的设备改造与革新

本文主要介绍了间歇式液相本体法聚丙烯生产中常见的设备问题及解决方法。采用YPV新型聚合釜，增加内冷管的数量，提高聚合釜传热能力；根据实际情况将原有聚合针轴封填料更换为新型填料或使用机械密封；更换喷料球阀内环材质，避免磨损量过大；采用工业色谱分析取代人工分析闪蒸釜丙烯含量、氧含量；通过以上方面的改造与革新，较好地解决了问题，提高了聚合釜产量和转化率。     

超重力旋转填料床的有效比表面积

以CO2-NaOH为介质,研究了填料结构、超重力因子、液体流量和气体流量等对两种多孔板错流旋转床有效比表面积的影响规律.结果表明,不锈钢多孔波纹板的有效比表面积大于聚丙烯多孔板,不锈钢多孔波纹板填料利用周期性变化的波纹表面不仅可以有效利用填料自身的比表面积,而且可起到良好的雾化扩展比表面积的作用,使有效比表面积增大至2.66倍.对实验数据进行回归得出了两种填料结构有效比表面积的关联式,根据关联式计算的有效比表面值与实验值吻合较好.