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performance coefficient中文什么意思

發(fā)音:   用"performance coefficient"造句
  • 冷凍系數(shù)
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例句與用法

  1. Parameters and the performance coefficient are calculated in two typical work conditions of refrigeration and heating
    同時(shí)，選定兩個(gè)典型的制冷和制熱工況，計(jì)算系統(tǒng)的各項(xiàng)參數(shù)及性能系數(shù)。
  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
    通過(guò)燃?xì)鉄崴髦茻岬妮椛涞匕骞┡c地源熱泵制熱的輻射地板供暖性能實(shí)驗(yàn)的對(duì)比，可以看出地源熱泵的供熱性能系數(shù)高于燃?xì)鉄崴?，同時(shí)在長(zhǎng)江中下游地區(qū)還可在過(guò)渡季節(jié)利用閉式循環(huán)水吸收土壤冷量對(duì)房間進(jìn)行供冷，提高系統(tǒng)運(yùn)行的經(jīng)濟(jì)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
    本文介紹了地源水-水熱泵全年冬夏暖冷聯(lián)供的實(shí)驗(yàn)結(jié)果以及過(guò)渡季地溫的恢復(fù)情況，分析了系統(tǒng)流量對(duì)熱泵性能參數(shù)的影響，獲得了最佳運(yùn)行流量為1000 （ l / h ） 。并實(shí)測(cè)得到單位管深換熱率及埋管的有關(guān)性能指標(biāo)。
  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
    大型數(shù)據(jù)倉(cāng)庫(kù)的處理速度問(wèn)題目前是制約其推廣應(yīng)用的關(guān)鍵所在，也是這一領(lǐng)域的一個(gè)重要研究課題，也正是我們當(dāng)前工作的重點(diǎn)：在前期研究工作的基礎(chǔ)上圍繞提高大型數(shù)據(jù)倉(cāng)庫(kù)處理速度問(wèn)題，建立改進(jìn)的數(shù)據(jù)倉(cāng)庫(kù)系統(tǒng)模型和相關(guān)算法，開(kāi)發(fā)出面向中級(jí)以上企事業(yè)單位的、具有數(shù)據(jù)挖掘和分析能力的大型數(shù)據(jù)倉(cāng)庫(kù)系統(tǒng)。建立大型數(shù)據(jù)倉(cāng)庫(kù)所面臨的關(guān)鍵問(wèn)題，是如何妥善解決實(shí)際業(yè)務(wù)數(shù)據(jù)的大規(guī)模、海量特征所帶來(lái)的處理速度和空間等問(wèn)題，這也是當(dāng)前挖掘技術(shù)研究必然面對(duì)的核心問(wèn)題。本研究的目的是設(shè)計(jì)并實(shí)現(xiàn)大型數(shù)據(jù)倉(cāng)庫(kù)系統(tǒng)中的分類數(shù)據(jù)挖掘工具? ?決策樹(shù)分類器，主要工作是在綜合了解現(xiàn)有決策樹(shù)分類算法的研究情況的前提下，對(duì)決策樹(shù)算法適應(yīng)大規(guī)模數(shù)據(jù)集的問(wèn)題進(jìn)行探討，力求設(shè)計(jì)出能較好地適應(yīng)大規(guī)模數(shù)據(jù)的分類器算法。

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