projection pursuit 中文意思是什麼

projection pursuit 解釋
投影尋蹤
  • projection : n 1 射出，投擲，發射，噴射。2 投射；投影，投影法；（地圖）投影圖製法；【電影】放映。3 凸出；凸出...
  • pursuit : n. 1. 追趕，追蹤；驅逐；追擊；追求。2. 實行；經營。3. 事務；職業，工作；研究。4. 〈美國〉【軍事】殲擊機，驅逐機 （＝pursuit plane）。
  1. Projection pursuit evaluation model based on raga in decision - making of investment

    項目投資決策的投影尋蹤評價模型及其應用
  2. This paper introduces the methods of hyperspectral images band selection based on the property of hyperspectral remote sensing images, utilizes the projection pursuit approach to find optimal solutions for a selected projection index based on dynamical evolutionary algorithm and then project a high dimensional data set into a low dimensional data space to produce a sequence of projection images, explores zero - detection method to threshold projection images to detect anomaly tar get

    摘要運用基於波段間相關性的高光譜影像波段選取方法進行波段的預選取，採用投影尋蹤的方法在動力演化演算法的基礎上尋找最佳投影方向，將高維數據投影至低維數據空間，在各投影分量圖像上採用零點檢測閾值化的方法進行異常目標的提取。
  3. For the bands selection of hyper spectral image, an algorithm called selected projection pursuit is established and a quick calculating method is developed, the calculating speed is increased 80 ( the bands number of hyperspectral image ) limes. the nonlinear principal curves is researched, it is the nonlinear expansion of pca

    針對高光譜圖像光譜波段的最優波段選擇問題，構造了選元投影尋蹤演算法，並為此建立了一種快速選元投影尋蹤演算法，使演算法的速度提高將近80倍（波段總數的倍數） 。
  4. In this paper, we utilized the wavelet to estimate cook ' s, friedman ' s and hall ' s projection index, and proved that the wavelet estimator of this projection pursuit indices are mse convergence and asymptotically unbiased., and the wavelet estimator of the ppda index is asymptotically unbiased

    證明了cook投影指標族、 friedman投影指標和hall投影指標的小波估計的漸近無偏性和均方收斂性，投影尋蹤判別分析指標（ projectionpursuitdscriminantanalysis簡稱ppda ）的小波估計的漸近無偏性。
  5. Projection pursuit grade evaluation

    的投影尋蹤等級評價
  6. Application of projection pursuit grade evaluation model in comprehensive evaluation of changes in soil quality

    投影尋蹤等級評價模型在土壤質量變化綜合評價中的應用
  7. Experiment data is analyzed with method of projection pursuit for more reliability and utility value. this paper first systematically studied energy dissipater of suspension girder in steep gradient with supercritical flow according to used in actual engineering and received perfect effect. experimental studies about the distribution velocity, the variation of water surface and pressure are undertaken

    然而，文章主要針對已獲國家自然科學基金資助，且已在實際工程實踐中產生了良好消能效果的陡坡急流懸柵消能工的部分試驗成果，進行了較全面深入地討論，即具體根據試驗資料系統分析了懸柵陡槽內泄水時的流速分佈、底板壓力分佈及水面線變化情況。
  8. Application of projection pursuit method to assessment of slope stability

    投影尋蹤新演算法在水質評價模型中的應用
  9. The multi - directional projection pursuit and the feature extraction of hyperspectral remote sensing image

    多方向投影尋蹤與高光譜遙感圖像特徵提取
  10. Estimation of restoration of annual runoff series by using projection pursuit method

    投影尋蹤法在徑流還原計算中的應用研究
  11. In chapter 3 we analyze a useful statistical method - projection pursuit ( pp ), including its basic theory and application. we put out definitions of projection index and projection pursuit, then prove that pca is a special case of pp with sample variance as projection index and list some indices often used. in section 3. 3 we apply pp with information divergence index to hyperspectral image, and demonstrate the advanced ability of it by the comparison between it and pca

    第三章圍繞一種新興的統計降維方法? ?投影尋蹤展開討論，概述投影尋蹤的一般理論，定義了投影指標和投影尋蹤的概念，證明了傳統的主成分分析方法是投影尋蹤的一個特例，證明了正態性與friedman指標為0的等價性；第三節針對高光譜圖像處理問題，從實例和理論兩個方面，論證了以信息散度為指標的投影尋蹤方法在提取信息的能力上優于以方差大小作為衡量信息量多少標準的主成分分析方法。
  12. Credit risk assessment in commercial banks : projection pursuit diseriminantmodel

    投影尋蹤新方法在泥石流危險度評價中的應用
  13. Projection pursuit dynamic cluster model and its application to evaluation of ecological quality of sichuan province

    投影尋蹤動態聚類方法及其在四川省生態環境質量評價中的應用
  14. Applications of projection pursuit method in economical appraisals of oil and gas development projects

    投影尋蹤模型在油氣開發項目經濟評價中的應用
  15. Abstract : some of the present models of forecasting zipingpu ' s flood can t fully discover the information in flood process and others are impractical. so a staistical method, projection pursuit regression is applied in forecasting peak flood and flood process. comparing with other models, the new one gets high precision and is easy to be operated in practice

    文摘:針對現有紫坪埔洪水預報模型或不能充分挖掘樣本信息或不便於實際應用的問題，現用投影尋蹤回歸方法建立了紫坪埔洪水預報模型，分別對洪峰和洪水過程進行了預報，並與其他方法進行了對比，取得了滿意的效果，可以作為紫坪埔洪水預報的新方案。
  16. On the method of choosing the type about interchange based on projection pursuit cluster model

    基於投影尋蹤模型的互通式立交選型方法
  17. Genetic algorithm is a highly collateral, random, self - adaptive, general and globe search algorithm, which simulates biologic evolution process. in this paper, genetic algorithm is applied to optimizing the model optimum in what is evaluated by projection pursuit algorithm

    採用遺傳演算法對于投影尋蹤方法在評價過程中涉及到的模型優化問題進行優化，遺傳演算法是模擬生物「優勝劣汰」進化過程而形成的一種高度并行、隨機和自適應的通用性全局搜索演算法，能夠處理非線性較強的優化問題。
  18. The approximation property of projection pursuit wavelet neural network ( ppwnn ) which is applied to non - linear function is studied, the convergence rate is given in this paper also. 3. we demonstrate projection pursuit wavelet neural network ( wppnn ) has a good applicability by the approximation of five non - linear functions and the prediction of sunport and chaos time series and the use of edge detection

    主要工作如下： （ 1 ）建立了投影尋蹤小波神經網路的數學模型、拓撲結構及非線性學習機理； （ 2 ）證明了投影尋蹤小波神經網路可以逼近非線性函數，並給出了其收斂速度； （ 3 ）通過投影尋蹤小波神經絡對五種非線性函數的逼近和對太陽黑子、混沌時間序列的模擬預報以及投影尋蹤小波學習網路在圖象邊緣檢測中的應用，說明該網路具有很強的實用性。
  19. This algorithm uses approximate entropy index ' s projection pursuit based on real coding genetic optimize algorithm ( rcgoa - pp ) to project the targets information hided in the high - dimensional data into low - dimensional space and then extract small targets with histogram image segmentation method

    該演算法用基於近似相對熵的實碼遺傳優化投影尋蹤方法（ rcgoa - pp ） ，有效地將高維數據中隱藏的目標信息集中投影到低維空間中，並用直方圖分割的方法提取出小目標。
  20. Abstract : this paper summarized some methods which were often applied in air pollution forecast, introduced three mainly used models of air pollution forecast in detail, such as air quality model, gray theory model and projection pursuit regression model, analysed the practice and limitness of those models, formulated some problems which would be paid attention to on forecasting air pollution

    文摘:綜述了當前常用的大氣污染預測方法、對空氣質量模型、灰色理論模型、投影尋蹤回歸模型等3種主要的大氣污染預測方法進行了詳細介紹，重點分析討論了這些方法的實用性和局限性，闡述了進行大氣污染預測時應注意的幾個問題。
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