By using remote sensing image data of Landsat-5 TM (1988, 1995 and 1998) and Landsat-7 ETM (2002), remote sensing image data, land-use map and DEM had been put in the same coordinate system and projection. In ArcView,...By using remote sensing image data of Landsat-5 TM (1988, 1995 and 1998) and Landsat-7 ETM (2002), remote sensing image data, land-use map and DEM had been put in the same coordinate system and projection. In ArcView, all data had been rasterized as grid data of 30 m×30 m. By Fragstats, landscape pattern indexes had been calculated. Based on the average area, patch density, landscape isolation, boundary density, shape index, fractal dimension, aggregation degree, diversity and evenness index, landscape pattern at different periods and its evolution had been analyzed, revealing the differentiation of spatio-temporal change of landscape pattern at both banks of Pearl River Estuary.展开更多
In this paper, we reveal the multiple boundary layer phenomena of the solution of nonlinear higher order elliptic equations with perturbation both in boundary and in operator, and provide a method to find uniformly va...In this paper, we reveal the multiple boundary layer phenomena of the solution of nonlinear higher order elliptic equations with perturbation both in boundary and in operator, and provide a method to find uniformly valid asymptotic solution of arbitrary order for these types of problems.展开更多
构建绿色低碳和灵活高效的综合能源系统(integrated energy system,IES)是推动“双碳”目标的主要途径之一。为此,提出了考虑供需双侧响应和绿证-碳融合交易机制的IES多时间尺度优化调度方法。首先,分析了供需双侧灵活响应机理,在源侧...构建绿色低碳和灵活高效的综合能源系统(integrated energy system,IES)是推动“双碳”目标的主要途径之一。为此,提出了考虑供需双侧响应和绿证-碳融合交易机制的IES多时间尺度优化调度方法。首先,分析了供需双侧灵活响应机理,在源侧引入卡琳娜循环和电锅炉对热电联产机组进行改进,建立热电灵活响应模型,并在荷侧辅之电、热多类型需求响应,构建了供需双侧灵活响应模型。其次,分析了绿证交易和碳交易之间的协调机理,考虑绿证背后的碳减排原理,提出绿证-碳融合交易机制。最后,建立了考虑供需双侧灵活响应和绿证-碳融合的IES多时间尺度调度模型,并考虑到需求响应在不同时间尺度的响应差异,研究了不同时间尺度下供需双侧响应的调节能力。算例仿真设置不同方案,分别探讨了日前、日内和实时三个阶段的优化结果,验证了所提模型在经济性、低碳性和灵活性方面的有效性。展开更多
This paper is on fuzzy decision theory and information security theory which are mutually independent and engrafted. This paper presents both-branch fuzzy decision and problems on decision encryption-authentication, p...This paper is on fuzzy decision theory and information security theory which are mutually independent and engrafted. This paper presents both-branch fuzzy decision and problems on decision encryption-authentication, puts forward two kinds of both-branch fuzzy decision on X: both-branch fuzzy decision on X having bounded domains X = X+∩X- ={x0}, both-branch fuzzy decision on X havingoverlapping domains X* = X+∩X- = {x_1~*,x_2~*,…,x_1~*}. It presents single branch separate-separate out theoremof both-branch fuzzy decision on X, single branch superposition theorem of both-branch fuzzy decision, exclusive-decompose principle of both-branch fuzzy decision. This paper presents encryption-authentication theorem of decision by engrafting information security theory and technique with both-branch fuzzy decision, and provides encryption-decryption and signature-authentication of both-branch fuzzy decision.展开更多
基金Supported by Natural Science Foundation of China(40534019)~~
文摘By using remote sensing image data of Landsat-5 TM (1988, 1995 and 1998) and Landsat-7 ETM (2002), remote sensing image data, land-use map and DEM had been put in the same coordinate system and projection. In ArcView, all data had been rasterized as grid data of 30 m×30 m. By Fragstats, landscape pattern indexes had been calculated. Based on the average area, patch density, landscape isolation, boundary density, shape index, fractal dimension, aggregation degree, diversity and evenness index, landscape pattern at different periods and its evolution had been analyzed, revealing the differentiation of spatio-temporal change of landscape pattern at both banks of Pearl River Estuary.
文摘In this paper, we reveal the multiple boundary layer phenomena of the solution of nonlinear higher order elliptic equations with perturbation both in boundary and in operator, and provide a method to find uniformly valid asymptotic solution of arbitrary order for these types of problems.
文摘构建绿色低碳和灵活高效的综合能源系统(integrated energy system,IES)是推动“双碳”目标的主要途径之一。为此,提出了考虑供需双侧响应和绿证-碳融合交易机制的IES多时间尺度优化调度方法。首先,分析了供需双侧灵活响应机理,在源侧引入卡琳娜循环和电锅炉对热电联产机组进行改进,建立热电灵活响应模型,并在荷侧辅之电、热多类型需求响应,构建了供需双侧灵活响应模型。其次,分析了绿证交易和碳交易之间的协调机理,考虑绿证背后的碳减排原理,提出绿证-碳融合交易机制。最后,建立了考虑供需双侧灵活响应和绿证-碳融合的IES多时间尺度调度模型,并考虑到需求响应在不同时间尺度的响应差异,研究了不同时间尺度下供需双侧响应的调节能力。算例仿真设置不同方案,分别探讨了日前、日内和实时三个阶段的优化结果,验证了所提模型在经济性、低碳性和灵活性方面的有效性。
基金This work was supported by the National Natural Science Foundation of China (Grant No. 70271048) the Natural Science Foundation of Shandong Province (Y2001G07).
文摘This paper is on fuzzy decision theory and information security theory which are mutually independent and engrafted. This paper presents both-branch fuzzy decision and problems on decision encryption-authentication, puts forward two kinds of both-branch fuzzy decision on X: both-branch fuzzy decision on X having bounded domains X = X+∩X- ={x0}, both-branch fuzzy decision on X havingoverlapping domains X* = X+∩X- = {x_1~*,x_2~*,…,x_1~*}. It presents single branch separate-separate out theoremof both-branch fuzzy decision on X, single branch superposition theorem of both-branch fuzzy decision, exclusive-decompose principle of both-branch fuzzy decision. This paper presents encryption-authentication theorem of decision by engrafting information security theory and technique with both-branch fuzzy decision, and provides encryption-decryption and signature-authentication of both-branch fuzzy decision.
