slowly changing potential 中文意思是什麼
slowly changing potential
解釋
緩慢變動電位-
Slowly changing potential
緩慢變動電位 -
Haloes in the two accretion phases show systematically different properties, for example, the circular velocity vh increases rapidly with time and approximately equals the inner circular velocity vs in the fast accretion phase, but remain almost constant and less than vs in the slow accretion phase : the inner properties of a halo, such as rs and ms increase rapidly with time in the fast accretion phase but change only slowly in the slow accretion phase : the halo concentration changes slow in the fast accretion phase, but increases rapidly with the hubble expansion in the slow accretion phase. the inner structure and potential well associated with a halo is built up mainly in the fast accretion phase, while a large amount of mass can be accreted in the slow accretion phase without changing significantly the inner properties and the potential well
~ 4 ，其束縛能和具有相同圓周速度的等溫球大致相等; （ s ）在這兩個階段，暗暈的行為特徵迥異（例如，圓周速度均『在快速吸積階段增長迅速且略大於內部圓周速度: 、 ，而在緩慢吸積階段基本恆定甚至降低，且小於、 、 . : 、和呱在快速吸積階段增長迅猛，而在緩慢吸積階段增長滯緩） : （ l ）一個暗暈的內部結構和引力勢阱主要是在早期的快速吸積階段成長起來的，雖然在緩慢增長階段可以吸積大量的質量（超過10倍） ，但這並不顯著地改變其內部特徵和引力勢阱 -
Secondly, the generation of electricity and the sale of electricity increase slowly, the proportion and the cost of purchasing electricity go up. thirdly, the electricity expense due becomes more and more so that the operation of the electric grid becomes more and more difficult, and the knowledge on characteristic of demand is not enough to exploit the potential of power consuming market. finally, the concept of marketing is not based on the market, and the low level of service results in the simpleness of the marketing strategy, and the marketing system cannot meet the demand of the market changing
市場化改革給供電企業提出許多新問題，尤其是市場營銷面臨嚴峻的挑戰：電力銷售由供不應求轉變為需求不足；發電量和售電量呈低速增長，購電比重上升，購電成本增加；欠電費數額增長，電網運營困難；用電市場潛力深挖不夠，需求特點了解不足；營銷思想沒有真正以市場為導向、服務水平不高、營銷策略較單一、市場營銷體系不能適應市場變化的需要等。
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