而選用了預備 的英文怎麼說
中文拼音 [ērxuǎnyònglēyùbèi]
而選用了預備
英文
preparation- 選 : Ⅰ動詞1. （挑選） select; choose; pick 2. （選舉） elect Ⅱ名詞（挑選出來編在一起的作品） selections; anthology
- 用 : Ⅰ動詞1 （使用） use; employ; apply 2 （多用於否定: 需要） need 3 （敬辭: 吃; 喝） eat; drink Ⅱ名...
- 了 : 了助詞1. （用在動詞或形容詞后, 表示動作或變化已經完成） 2. （用在句子的末尾或句中停頓處, 表示變化, 表示出現新的情況, 表示催促或勸止）
- 預 : Ⅰ副詞（預先; 事先） in advance; beforehand Ⅱ動詞（參與） take part in
- 備 : Ⅰ動詞1 （具備; 具有） have; be equipped with 2 （準備） prepare; provide with; get ready 3 （防備...
- 選用 : select and use [apply]
- 預備 : prepare; get ready
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The power industry of our country is fast growing, having made the enormous achievement in power construction, installed power - generating capacity and annual generation have already averagly leapt to the second place in the world, regional high voltage, main net shelf of the voltage grade of superelevation that most areas have formed transprovincially, electric short supply state is improved by a certain degree, power industry has supported the fast development of national economy effectively. after the obvious change takes place in the state between supply and demand of electric market, the current electric system exposes some drawbacks not meeting the needs of socialist market economy system. it is obvious to monopolize the systematic defect managed day by day, the market barrier has hindered the forming of the electric market transprovincially between provinces, has hindered the electric power resource from improving the whole competitive power of national economy, the country determines to further deepen the process of the electric system reform
本文運用市場營銷學、電力需求側戰略管理的相關理論，從對電力需求側管理與營銷現狀、存在問題和特徵的了解入手，通過對電力市場宏觀環境和電力市場主體的分析，對電力需求側管理與營銷目標市場進行細分，確立了電力需求側管理與營銷目標市場並進行定位，進而提出了電力需求側管理與營銷成本領先、市場滲透的戰略選擇，在戰略選擇的基礎上重點對電力市場營銷策略進行了研究，提出了實施營銷戰略和各項策略必備的組織、保障措施，對實施中可能出現的問題進行預測並提出相關對策，從而初步形成一套電力市場營銷體系，以指導供電企業的電力需求側管理與營銷工作，提高增供促銷水平。The raw materials, the composition, the time of milling, the calcining temperature, the different additives, the sintering temperature and the sintering parameters were investigated. the result showed : it was advantaged to obtain high initial permeability mnzn ferrite with stable frequency characteristic using high - purity raw materials ; in order to obtain mnzn ferrite with high properties, we must control strictly the composition ; it could improve the properties of mnzn ferrite by optimizing calcining temperature. the lower calcining temperature made the permeability higher, and the higher calcining temperature could promote the frequency characteristic of permeability ; we chosen the right time of milling according to the requirement of power diameter ; in order to improve the properties of mnzn ferrite, it is necessary to add effective additives. in this dissertation, the influence of bi2o3 、 moo3 、 k2co3 、 co2o3 were investigated ; the sintering temperature, the time of heat - retaining and sintering parameters were the key factors of preparing high permeability mnzn ferrites
研究結果表明:採用高純度的fe2o3有利於獲得高起始磁導率且頻率特性優良的鐵氧體;為了制備所需性能的鐵氧體，需要嚴格控制配方中各種原材料的含量，優化配方;由於粉體活性受預燒條件的影響，所以對不同要求的鐵氧體選擇的預燒條件就不一樣，適當降低預燒溫度有利於獲得較高的起始磁導率，而為了獲得良好的頻率特性可以適當地提高預燒溫度;根據對粉體顆粒粒徑的不同需求，可以選擇不同的球磨時間;而有效的添加劑是改善材料性能的必要條件，本文在添加劑的研究中主要對bi2o3 、 moo3 、 k2co3 、 co2o3的影響分別作了詳細地討論;燒結溫度、保溫時間和燒結氣氛是高磁導率mnzn鐵氧體制備最關鍵的工藝，適宜的燒結工藝可以獲得理想微結構和組成，從而得到高性能的鐵氧體材料;而從材料的微結構上來看，要提高材料的截止頻率，就要適當地細化晶粒、增加晶粒內部的氣孔。
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