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铜带冷轧的坯料较厚,卷材松散、内径变化范围较大,所以对铜带坯开卷机提出了一些特殊的要求,造成了铜带冷轧机独有的开卷方式.本文对国内外铜带冷轧机的各种开卷方式进行介绍并评价其优缺点,可供铜带冷轧机设计或改造时选择参考. 相似文献
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阐述了当前炼铁除尘灰各种再利用方式的特点,分析了各种利用方式的科学性.分析认为,除尘灰与粉煤一同喷入高炉的利用法优于重返烧结、球团工艺参与配料造块方法,该喷吹方法对鞍钢现行的高炉综合喷吹技术是最佳选择. 相似文献
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基于Visual Basio(VB)语言,开发出了烧结厂设计计算软件,井将各种型号设备的参数导入软件中指导设备选择.该软件具有广泛的适用性,能满足不同烧结工艺设计计算的要求,能大幅度降低工艺计算和设备选择的工作量,提高工作效率. 相似文献
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企业物资采购,是企业的最大的成本之一,选择合理的采购方式不仅可以降低企业的成本,而且给企业带来很高的经济效益.本文结合大庆油田的实际,分析了各种物资采购方式,为进一步降低企业成本奠定基础. 相似文献
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引水发电使有限水资源经人工引导,形成足够大的落差进而带动水轮机发电的工程系统.隧洞引水就足其中之一,它利用隧洞的引流,通过斜井等方法使进水口与出水口的高差足够大,从而增大水流冲击力,使水轮机运转发电.设计的弯管、斜井(或怪井),往往都是施工场地狭小,施工环境差,造成测量放样的要求较高. 相似文献
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循环水系统存在的水锤问题及对策 总被引:1,自引:0,他引:1
通过对自备电厂循环水系统水锤造成设备损坏的原因进行分析,发现是循环水泵出口碟阀关闭时间和关闭特性存在问题。通过试验调整关阀时间和关阀特性,彻底地解决了所存在的问题。 相似文献
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The aim of this study was to determine if mothers display identifiably different communicative styles in their interaction with their normally developing two- to five-year-old children. In order to investigate this issue an extensive coding system was developed, which assessed the structural organization and the communicative function of the speech of 71 mothers as they interacted with their children. By means of factor analysis three maternal communicative styles were distinguished: non-intervening, explaining and directing. In the non-intervening style there is no direct pressure from the mother on the child to respond verbally. The explaining mother is primarily concerned with providing information to her child in a way that gives the child little opportunity to take the speaking turn. The directing mother is mainly engaged in directing the child's behaviour by means of verbal control. The internal consistency of the three communicative styles appeared to be both satisfactory and related to relevant child and mother features. 相似文献
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针对宣钢公司4#高炉煤气洗涤循环水系统水泵工频运行,日常洗涤水量由阀门开度调节控制、供水量较大、供水电耗高、造成大量电能浪费的问题,在低压水泵处增加1套目标电耗节能控制系统及变频控制柜,对高压水泵的叶轮进行切削处理,改造后该系统每年的节电效益为36.3万元,为4#高炉提供了合格的煤气洗涤水,系统运行稳定可靠,取得了较好效果。 相似文献
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本阐述了热水供热和供暖系统采用补给水泵连续补水定压的几种工作方式及各方式能耗情况,供有关人员参考。 相似文献
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Harren Vincent A.; Kass Richard A.; Tinsley Howard E.; Moreland John R. 《Canadian Metallurgical Quarterly》1978,25(5):390
Examined the relative influence of gender, sex role attitudes, cognitive styles and decision-making process on choice of major by means of path analysis procedures. 578 college students from all classes completed the Assessment of Career Decision Making, the Paragraph Completion Method (a measure of conceptual level), the Cognitive Differentiation Grid, and the Bem Sex Role Inventory. It was found that progress in the decision-making process most directly influenced choice of major. Gender, sex role attitudes, and cognitive styles had little direct influence on choice of major; rather, their influence was indirect, via the decision-making process. These results support the following causal inferences: Gender influences sex role attitudes; sex role attitudes and cognitive styles influence progress in the decision-making process; and the latter directly influences whether a satisfying choice of major has been made. (18 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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高炉循环水泵站运行效率分析与探讨 总被引:1,自引:0,他引:1
由于外界条件的变化与差异,泵站的实际运行工况总是或多或少地偏离设计最佳工况。本文根据攀钢高炉循环水泵站运行情况,对该泵站净环泵组及水泵的运行进行了电耗和效率的分析,并探讨了节能措施。 相似文献