發(fā)布時(shí)間：2019-01-15 08:19

【摘要】：在分析符合"安全性"要求的數(shù)字水深模型(DDM)正向滾動(dòng)球變換應(yīng)用局限的基礎(chǔ)上,根據(jù)高保真DDM多尺度表達(dá)評(píng)價(jià)標(biāo)準(zhǔn)中對(duì)水深值準(zhǔn)確性、嚴(yán)密有序性及地形信息等級(jí)嵌套性的要求,從顧及"保真性"原則的DDM多尺度表達(dá)需要出發(fā),提出一種基于雙向滾動(dòng)球變換的DDM多尺度表達(dá)算法。分析了海底地貌特征點(diǎn)在DDM雙向滾動(dòng)球變換過程中的變化趨勢(shì),根據(jù)DDM正向滾動(dòng)球變換的尺度依賴特性,計(jì)算出了一定尺度下海底地貌的橫向分布范圍與縱向分布高度,建立了DDM多尺度表達(dá)中細(xì)部(骨架)地貌的判定準(zhǔn)則。通過保留給定尺度下DDM中的骨架地貌,使海底地形的整體變化趨勢(shì)得到了保持,滿足了DDM多尺度表達(dá)對(duì)水深值準(zhǔn)確性的要求;論證了DDM單值曲面等距離面變換的水深序同構(gòu)特性,通過對(duì)給定尺度下的細(xì)部地貌進(jìn)行DDM雙向滾動(dòng)球變換的等距離面提取,使海底地形的局部起伏形態(tài)得到了保持,滿足了DDM多尺度表達(dá)對(duì)水深值嚴(yán)密有序性的要求;從滿足DDM多尺度表達(dá)對(duì)地形信息等級(jí)嵌套性的要求出發(fā),分析了DDM雙向滾動(dòng)球變換中尺度因子與地形信息等級(jí)單元邏輯包含關(guān)系的不相關(guān)性,論證了任意尺度因子條件下具有的相應(yīng)等級(jí)地形信息范圍的一致性。試驗(yàn)結(jié)果表明該算法克服了DDM正向滾動(dòng)球變換存在的無法保留負(fù)向骨架地貌和保持海底局部地形起伏形態(tài)等不足,可有效保留DDM中骨架地貌并綜合細(xì)部地貌,滿足顧及"保真性"原則的DDM多尺度表達(dá)要求。
[Abstract]:Based on the analysis of the limitation of the application of (DDM) forward rolling sphere transformation, which meets the requirements of "safety", the accuracy of the water depth value in the high fidelity DDM multi-scale expression evaluation standard is analyzed. In order to meet the requirements of strict order and nesting of terrain information level, a DDM multi-scale representation algorithm based on bi-directional rolling sphere transformation is proposed to meet the needs of multi-scale representation of DDM based on the principle of "fidelity". The variation trend of submarine geomorphologic feature points in the process of DDM bidirectional rolling sphere transformation is analyzed. According to the scale dependence characteristics of DDM forward rolling sphere transformation, the horizontal distribution range and longitudinal distribution height of submarine geomorphology are calculated at a certain scale. The criteria for determining the detailed (skeleton) landforms in DDM multi-scale representation are established. By retaining the skeleton geomorphology in DDM on a given scale, the overall variation trend of submarine topography is maintained, which meets the requirements of DDM multi-scale expression for accuracy of water depth. This paper demonstrates the isomorphism of the isometric transformation of the isometric surface of DDM single valued surface. By extracting the isometric surface of the detailed geomorphology of the given scale from the DDM bi-directional rolling sphere transformation, the local undulating shape of the submarine topography is preserved. It satisfies the demand of DDM multi-scale expression for the strict order of water depth value. In order to meet the requirements of DDM multi-scale representation for the nesting of topographic information levels, this paper analyzes the irrelevance between the mesoscale factors of DDM bi-directional rolling sphere transformation and the logical inclusion of topographic information hierarchy units. The consistency of the range of topographic information of the corresponding grade under the condition of arbitrary scale factor is proved. The experimental results show that the algorithm overcomes the shortcomings of DDM forward rolling sphere transformation, such as the negative skeleton landform can not be preserved and the local topographic undulating shape of the seabed can be maintained, and the skeleton geomorphology in DDM can be effectively preserved and the detailed geomorphology can be integrated. Satisfy the requirement of DDM multi-scale expression which takes into account the principle of "fidelity".
【作者單位】： 海軍大連艦艇學(xué)院海洋測(cè)繪系;海軍大連艦艇學(xué)院海洋測(cè)繪工程軍隊(duì)重點(diǎn)實(shí)驗(yàn)室;海軍出版社;92403部隊(duì);
【基金】：國(guó)家自然科學(xué)基金(41471380;41601498)~~
【分類號(hào)】：P208

【相似文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 秦忠誠(chéng);3D-FSM·DDM間接邊界元數(shù)值系統(tǒng)及其在礦山工程中的應(yīng)用研究[D];山東科技大學(xué);2007年

，

本文編號(hào)：2409036