Secondly , based on the estimated market clearing prices of electricity an effort is made to investigate the optimal strategies of maintenance scheduling for generating units with risk management , under the methodological framework of the well - developed chance constrained programming 該模型允許所形成的檢修方案在某些情況下不滿足小于某一給定的收益損失的約束,但這種情況發(fā)生的概率必須小于某一置信度水平。
This paper presents a refined methodological framework for measuring accessibility , which enables the researcher to ( 1 ) improve the measurement by accounting for job competition among workers commuting by different modes and ( 2 ) understand the outcome more thoroughly by distinguishing the effect of location from that of workers ' auto ownership 本論文提出一種較優(yōu)的可達性測度方法,從而使研究者一方面能把就業(yè)競爭考慮在內(nèi),另一方面能區(qū)分地理位置和交通模式對測度結(jié)果的影響。
First , a new methodological framework is developed for investigating the optimal strategies of maintenance scheduling for generating units with risk well taken into account , based on the widely employed power pool mode and the uniform clearing price . two scenarios are examined in detail , i . e . , for the two cases that the generation company studied is / is not a price taker in the electricity market operation . based on the electricity market clearing prices estimated , a new methodological framework is presented , mathematical models formulated and a solving method developed 以國內(nèi)外廣為采用的聯(lián)營體模式、統(tǒng)一市場清算價結(jié)算的現(xiàn)貨電力市場為背景,在假設(shè)市場電價可以預(yù)測并能夠描述為某種概率分布的前提下,采用方差或標(biāo)準(zhǔn)差來描述和度量風(fēng)險;建立了相應(yīng)的優(yōu)化模型,為發(fā)電公司在制定發(fā)電機組的檢修計劃時適當(dāng)兼顧利潤損失的期望值最小和風(fēng)險最小這兩個目標(biāo)提供了新的解決途徑。