关于水蓄冷系统设计中的几个问题

水蓄冷槽是空调水蓄冷系统中的核心设备之一。本文根据日本最近的资料，主要就蓄冷槽及其关连部分在设计中的一些问题作一阐述。     

新型穿流搅拌釜构型参数的正交实验研究

深入研讨了新型穿流式搅拌釜的构型参数，特别着重研究了设置穿流式挡板和搅拌桨对搅拌釜性能的影响．通过正交实验研究了挡板宽度、开孔孔径、开孔率和离壁安装距离以及桨叶开孔孔径、开孔率和离底安装距离等七个构型因素对搅拌釜性能的影响（包括临界转速、混合时间、功率消耗等），结果表明各因素的影响均十分重要，根据正交实验方差分析的结果，确定了较佳的桨叶和挡板的开孔孔径、开孔率、挡板宽度、板离壁安装距离和桨叶离底安装距离．研究结果表明：设有穿流式挡板和桨叶的搅拌釜是一种具有广阔应用前景的结构简单而又高效节能的新型构型的混合与反应装置．     

精密机床液压油温计算机监控系统的设计

论述了精密机床液压油温控制系统的设计方法，针对受控对象的特点，利用ＭＣＳ－５１单片机，选择ＰＩＤ算法产生控制信号来控制各执行机构来达到控制油温的目的．     

STUDY OF AIRFLOW HOMOGENEITY STANDARD IN REGENERATIVE CHAMBER OF TANK FURNACE

The authers compared six used criterions ofinflucencing homogeneity of moving airflow in virtue of er-rors such as variance Q,average square deviation T,homoge-neous indices H,inhomogeneous degree W,range R and non-uniform index S.The auther think that the effects of the er-rors will be magnified when all these old stnadards were cal-culated,especially for higher airflow homogeneity,thus,thereliability of these norms would be reduced.The authers putforward two new standards to lower influence of error.     

从浮选尾矿中回收白钨矿试验研究

为充分利用矿产资源,提高企业效益,经过近2年的技术攻关,直接从硫化矿浮选尾矿中浮选回收白钨矿试验获得成功。通过粗选工业试验和粗精矿加温小型试验,在白钨入选品位0.25%的条件下,取得了白钨精矿65.046%、回收率50.47%的较好指标。对项目进行可行性研究论证,预计投产后能大幅提高企业效益。     

Modelling and FDI of Dynamic Discrete Time Systems Using a MLP with a New Sigmoidal Activation Function

In this paper we investigate the use of the multi-layer perceptron (MLP) for system modelling. A new sigmoidal activation function is introduced and the study is focused at the utilization of this function on a MLP that performs modelling of dynamic, discrete time systems. The role of the activation function in the training process is investigated analytically, and it is proven that the shape of the activation function and it's derivative can affect the training outcome. The method is simulated at a well known benchmark, namely the three tank system, and is incorporated in a Fault Detection and Identification (FDI) method, also applied and simulated at the three tank system. Finally, a comparison is made with an approach that utilizes local model neural networks for system modeling.     

中性束注入器Tank充气特性对离子源放电的影响

利用对PV-10型压电阀定标实验,研究了中性束注入器Tank内补充气体的参数对离子源放电弧电流的影响,对比压电阀脉冲电源的脉宽和幅值,显示后者对Tank内补充气体量具有更显著的线性关系.据此进行的中性束注入器离子源放电实验结果表明,采用压电阀定标值计算获得的参数,可以稳定重复地获得最大放电脉宽达到400 ms的等离子体弧电流,为下一步向托卡马克装置注入高能中性粒子束奠定了应用基础.     

Synthesis of γ-alkoxy-propylamines and their collecting properties on aluminosilicate minerals

1　INTRODUCTIONBayerprocessiswidelyusedtotreatthebauxitewithmoleratioofAl2 O3toSiO2 (n (Al) /n (Si) )morethan 8.AlthoughthereareabundantbauxiteresourcesinChina ,mostofthemarediasporicbaux itewithhighaluminumcontent ,butlown(Al) /n(Si) ,usually 5 8[1] .ThistypeofbauxiteisdifficulttobetreateddirectlybytheBayerprocess .Itisthereforehighlydesirabletoincreasen(Al) /n(Si)ofbauxitebyphysicalcleaning[2 ] .Forthisreason ,flotationdesilicate Bayerprocesswasdeveloped[3] .Flotationdesilicationc…     

带调压井水电站水力过渡过程试验研究

从工程实际出发,经模型试验和数值仿真计算对带调压井水电站水力过渡过程进行了深入的研究和分析,提出了带调压井水电站水力过渡过程模型试验的研究方法.研究表明,在一定的条件下,利用球阀进行水电站水力过渡过程试验,完全能满足水电站实际工程的需要.