forecasting performance of a model 中文意思是什麼

forecasting performance of a model 解釋
模型的預測效能
  • forecasting : （勞動力供求）預測
  • performance : n. 1. 執行，實行，履行；完成；實現；償還。2. 行為，動作，行動；工作。3. 性能；特性。4. 功績；成績。5. 演奏；彈奏；演出；（馴獸等的）表演；把戲。6. 【物理學】演績。
  • of : OF ＝Old French 古法語。
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  • model : n 1 模型，雛型；原型；設計圖；模範；（畫家、雕刻家的）模特兒；樣板。2 典型，模範。3 （女服裝店僱...
  1. Then the paper investigated the regularity of different oil indices using time series statistical analysis method, which suggested that there are some regular components in it, including long - term secular trend, seasonal component and long - term cyclical component. the irregular component also plays an important part in it, mainly including the policy of opec, war, all kinds of international convention for the prevention of pollution from tankers and so on. and then a study of simulation and forecasting performance of arima time series model was conducted to crude oil indices, evidence shows that arima model performs better, especially for short - term forecasting

    在此基礎上，本文以時間序列分析作為基礎研究手段，以德國海運費率指數公布的1980年1月至1999年12月的四類油運費率指數為研究對象，分析了四類油運費率指數的長期變化趨勢、季節變化規律、長期周期循環變化規律和不規則變化規律，並應用arima時間序列模型對160000dwt以上的原油運費率指數進行了短期預測，取得了較好的預測效果。
  2. Following the requirement of the reservoir operation section of north - west electricity management bureau in developing a 10 day runoff forecasting scheme and considering the situation of no suitable forecasting model to serve the purpose, this thesis, from ge shouxi ' s and wmo ' s point, defined a group of standards which are practicability, information ability which means the ability of a model to adopt information contend in observed data, extension capacity and robustness, being used for evaluating performance of a forecast model and with them makes a comparison among systematic models as multi - regression model, generalized tank model, neural network method and system model of genesis ( in short smg ), and one conceptual model, the xinganjiang model

    針對西北電網水調部門提出的開發黃河上游徑流中長期預報軟體的任務，根據wmo和葛守西的總結，本論文利用四個系統模型和一個概念模型對黃河上游的龍、劉兩庫的汛期入庫徑流量進行旬徑流預報嘗試，並對所用的模型進行了泛化性、穩健性、模型結構、對水文信息反映和實用性及作中長期預報時何種系統模型的輸入最好作了比較研究，為龍、劉兩庫的徑流中期預報模型的採用提出了建議。
  3. Based on correctly describing high pressure fuel injection spray, a quasi - dimensional combustion model for forecasting performance and emission of high pressure common rail diesel engine is established

    在正確描述高壓燃油噴霧的基礎上，建立了一個能預測高壓共軌柴油機性能和排放的準維燃燒模型。
  4. The rbf network has a better performance, and better forecasting accuracy. then mathematical model of substation voltage / var control is constructed, the squares minimization of voltage differences as target, also considering requirement of voltage and power balance, taking it into consideration that the magnitude constraint of transformer ratio and compensating capacitor, also that constraint of operation times of one day transformer tap and capacitor switch

    因此提高了學習性能，具有較好的預測精度。然後，建立變電站電壓無功控制的數學模型，考慮電壓的調壓要求和無功功率平衡，計及變壓器變比和並聯補償電容的上下限約束，變壓器分接頭和電容器允許的日調節次數的限制，以電壓偏差的平方和最小為目標函數。
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