Running physical stores costs money . do these stores signal any larger change in how dell manages costs 經(jīng)營具體的店面需要花費(fèi)。這些店面(的產(chǎn)生)能否是關(guān)于戴爾管理費(fèi)用重大改變的信號呢?
The second chapter studies the economy of ship ' s power plants , based on the aspects of lowering fuel cost , waste heat recovery , the match of ship , machinery and propeller , increasing propulsion efficiency , increasing the economy of ship ' s power plants , etc . the third chapter discusses in detail the control measures of voyage change cost , analysizes systematically the voyage change cost based on the way of fuel cost , harbor cost , voyage venture cost . the fourth chapter studies the structures and control measures of seafarers cost , maintenance cost , spare parts and stores cost , lubricating oil cost , etc . which are relatively easy to be controlled ; based on the state maintenance decision - making , a mathematical model is put forward , the validity and its solve process are discussed . the control measures of spare parts , fuel cost and lubricating oil cost should be based on scientific budget , through the control means of application , reception , usage , store check , try to acquire the inosculation of theory 第一章主要討論營運(yùn)船舶運(yùn)輸成本,對船舶運(yùn)輸成本的概念、結(jié)構(gòu)、性質(zhì)與分?jǐn)?、成本?xì)分進(jìn)行了分析,從宏觀上闡明了船舶運(yùn)輸成本的生存環(huán)境和生長趨勢;第二章研究了船舶動力裝置的經(jīng)濟(jì)性,在營運(yùn)船舶降低油耗、廢熱利用、船機(jī)槳匹配、提高推進(jìn)效率、提高船舶動力裝置經(jīng)濟(jì)性的有效途徑等方面進(jìn)行了闡述和論證;第三章詳細(xì)論述并論證了航次變動成本的控制措施,全面系統(tǒng)地分析和總結(jié)了航次變動成本,通過對燃油成本、港口使費(fèi)、航次風(fēng)險成本的分析與控制,提出了航次風(fēng)險成本的概念并論述了若干航次風(fēng)險成本的控制措施;第四章對船舶營運(yùn)成本中的船員費(fèi)用控制、維修保養(yǎng)及其費(fèi)用控制、船舶備件物料管理及其費(fèi)用控制等幾個主要可控性較高的成本進(jìn)行了細(xì)致的分析并分別討論了相互的控制措施,提出了基于狀態(tài)維修決策的馬爾可夫數(shù)學(xué)模型并論證了模型的正確性及具體解算步驟,對于備件、燃潤物料的控制堅持以科學(xué)的預(yù)算為前提,以申領(lǐng)、接收、使用、盤存為控制環(huán)節(jié),切實(shí)做到理論與實(shí)踐的密切結(jié)合;第五章,結(jié)合營運(yùn)成本的預(yù)核算的案例,對船舶營運(yùn)成本的預(yù)算及核算進(jìn)行了有益的探討,旨在揭示成本發(fā)生的動因,并給出了成本預(yù)算、核算的編制方法。
Fortunately , lapped transform ( lt ) , a classical transform arithmetic , possesses the dct ’ s feature of simple realization and low storing cost , while maintaining dwt ’ s advantage . by analyzing its time lapped transform ( tlt ) and frequency lapped transform ( flt ) , this article brings forward a arithmetic which carries the temporal laps and frequent laps at the same time and discusses this time - frequency lapped method ( tflt ) combining with context - based entropy coding 疊式變換( lt )兼有余弦變換( dct )實(shí)現(xiàn)簡單、存儲開銷小和dwt的優(yōu)點(diǎn),文中通過分析已有的時域重疊( tlt )和頻域重疊( flt )疊式變換,提出一種同時進(jìn)行時域和頻域重疊的疊式變換算法( tflt ) ,并結(jié)合上下文熵編碼,討論時頻域重疊式變換算法。
Nowadays compression method based upon wavelet transform has become the mainstream in image compressing field . but as we all know , wavelet transform can ’ t satisfy the requirement of portable devices and space - based compression for its drawback in large storing cost and high calculating complexity 目前基于小波變換( dwt )的壓縮方法是圖像壓縮的主流方法,但是小波變換作為一種全局的變換方法,存在著存儲開銷大、計算量高等特征,不能滿足便攜式設(shè)備以及星載壓縮等環(huán)境下的應(yīng)用要求。