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performance coefficient中文什么意思

发音:   用"performance coefficient"造句

例句与用法

  1. Parameters and the performance coefficient are calculated in two typical work conditions of refrigeration and heating
    同时，选定两个典型的制冷和制热工况，计算系统的各项参数及性能系数。
  2. At last , there is a practical design of gshp - radiant system in a villa in chongqing . the compare of the gas - heater radiant floor system and the gshp radiant floor system indicates that the heating performance coefficient of the gshp is higher than the gas - heater to a large extent . in addition , this united system can use the closed circling water in the underground heat exchanger to remove the surplus heat load in transitional season
    通过燃气热水器制热的辐射地板供暖与地源热泵制热的辐射地板供暖性能实验的对比，可以看出地源热泵的供热性能系数高于燃气热水器，同时在长江中下游地区还可在过渡季节利用闭式循环水吸收土壤冷量对房间进行供冷，提高系统运行的经济性。
  3. This paper introduced the experimental results for ground - source water / water heat pump , analyzed the effects of the variety flux on system performance coefficients , which showed that the optimal operation flux is 1000 ( l / h ) and provided the heat exchange rate per unit depth of coil , 45 80 ( w / m ) . compared the exchang - heat - curveline in winter with that in summer , through which showed the advantages of gshp in mode of heating and cooling on long - period operation
    本文介绍了地源水-水热泵全年冬夏暖冷联供的实验结果以及过渡季地温的恢复情况，分析了系统流量对热泵性能参数的影响，获得了最佳运行流量为1000 （ l / h ） 。并实测得到单位管深换热率及埋管的有关性能指标。
  4. Data warehouse is a hot research area in 90s its main motif is to provide the decision - maker a powerful tool : gathering the data in pure consistent , relevant pattern , and making use of the data in managing analyzing , data - mining purposec that means that the decision - maker can use the tool to understand , grasp the situation of the business from different directions and forecast the future of it when using data warehouse , the processing speed determines data warehouse ' s practicability and processing ability the hoc ( highway decision center ) system realized before solves some key problems about intermediate scale data , mainly concentrating data warehouse performance coefficient when using hdc in large scale data , it encountered processing speed problem then the settlement of this problem becomes a major research point so , based on the former research achievements , the present task is to construct the renowned data warehouse architecture and its relevant algorithms , then adapts the system to the large scale dataset with data mining functions c this paper is a part of the research in order to construct the powerful system , a key problem is to cope with the processing - speed problem and the data space problem , etc , - caused by the large scale dataset and magnificent dataset this is also the core in the present data mining research this paper ' s motive is to design and realize a decision - tree classifier in the data warehouse system for large - scale dataset
    大型数据仓库的处理速度问题目前是制约其推广应用的关键所在，也是这一领域的一个重要研究课题，也正是我们当前工作的重点：在前期研究工作的基础上围绕提高大型数据仓库处理速度问题，建立改进的数据仓库系统模型和相关算法，开发出面向中级以上企事业单位的、具有数据挖掘和分析能力的大型数据仓库系统。建立大型数据仓库所面临的关键问题，是如何妥善解决实际业务数据的大规模、海量特征所带来的处理速度和空间等问题，这也是当前挖掘技术研究必然面对的核心问题。本研究的目的是设计并实现大型数据仓库系统中的分类数据挖掘工具? ?决策树分类器，主要工作是在综合了解现有决策树分类算法的研究情况的前提下，对决策树算法适应大规模数据集的问题进行探讨，力求设计出能较好地适应大规模数据的分类器算法。

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Last modified time:Wed, 13 Aug 2025 00:29:56 GMT