简介:Chinabegantheresearchanddevelopmentofrenewableenergygenerationsince1970s,inparticularintheEighthFive-yearPlanperiod,theStatemadecloserattentiontotheresearchanddevelopmentofrenewableenergy,thereforethetechnicallevel,applicationscaleandeconomic,socialbenefitshaveseengreaterprogress.Thecombinedcapacityofrenewableenergygenerationreached100MWattheendof1994.Anditisplannedacombinedcapacityof1236MWwillbetargetedfortheyear2000.
简介:在总结JPEG2000标准定义的两种感兴趣区域(ROI)编码思想优缺点的基础上,提出一种新的ROI编码方法,即部分背景系数位平面位移算(PartialBackgroundCoefficientBitplanesShift,PBCBShift)。将背景系数的整个位平面分成两个部分:最重要位平面和剩余位平面。在编码器端,仅仅是背景系数的剩余位平面朝最不重要位平面方向下移。在解码器端,较高的位平面能比剩余位平面更快地解码。