difficult to be of help 中文意思是什麼

difficult to be of help 解釋
無以為力
  • difficult : adj. 1. 困難的，（工作等）艱難的。2. 執拗的，頑固的。
  • to : adv 到某種狀態；〈特指〉到停止狀態；關閉。 ★也常和動詞結合，略去其後賓語，而構成成語： The door i...
  • be : 1 Bachelor of Engineering 工學士。2 Bachelor of Economics 經濟學士。3 Bachelor of Education 教育...
  • of : OF ＝Old French 古法語。
  • help : vt （helped 〈古語〉 holp; helped; 〈古語〉 holpen ）1 幫助，援助;救 救濟。2 治療;補救。3 促進，...
  1. Because many image information data need to be transmitted and preserved, it is difficult to meet the requests for image information data to be transmitted and preserved by depending only on increasing the width of signal band and the processing speed of computers, we need to use image compression techniques to help to satisfy the requests

    大量的圖像信息需要存儲和傳輸，僅依靠提高通道帶寬和計算機的處理速度，不能滿足人們對圖像信息存儲和傳輸的需要，這就需要結合圖像的壓縮編碼技術來滿足人們的要求。當前圖像壓縮技術在生物醫學應用、無線通信、計算機圖形圖像處理等許多方面有著廣泛的應用。
  2. It is very difficult for the designer to provide proper control parameters which can be used to help the multi - robot system consisting of many autonomous robots work cooperatively

    對于由大量自主機器人組成的群體，如果採用由設計者提供合適的控制參數使之形成期望的協作行為，那是非常困難的。
  3. Control systems in modern automatic engineering are nonlinear, time - changed and indefinite. lt is difficult to model by traditional method, even sometime impossible. under these circumstances we should apply model identification to gain the approximate model of object for effective control, there are many models to be chosen, fuzzy model is one of them, it is put forward with the development of fuzzy control. fuzzy model has characteristics of general approximation and strong nonlinear, it is fit for describing complex, nonlinear systems. to avoid rules expansion when the number of input values are very big. in this paper we apply hierarchical fuzzy model to resolve this problem, we also illustrate it has general approximation to any nonlinear systems. genetic algorithm is a algorithm to help find the best parameters of process. lt has abilities of global optimizing and implicit parallel, it can be generally used for all applications. in our paper we use fuzzy model as predictive model and apply ga to identify fuzzy model ( including hierarchical fuzzy model ), we made experiments to nonlinear predictive systems and got very good results. the paper contains chapters as below : chapter 1 preface

    現代控制工程中的系統多表現為非線性、時變和不確定性，採用傳統的建模方法比較困難，或者根本無法實現，在這種情況下，要實現有效的控制，必須採用模型辨識的方法來獲取對象的近似模型，並加以控制，目前用於系統辨識的模型種類很多，模糊模型是其中的一種，它隨著模糊控制的發展而被人提出，模糊模型具有萬能逼近和強非線性的特點，比較適合於描述復雜非線性系統，為了解決模糊模型在輸入變量較多時規則數膨脹的問題，文中引入遞階型模糊模型，並引證這種結構的通用逼近特性。遺傳演算法是模擬自然界生物進化「優勝劣汰」原理的一種參數尋優演算法，它具有隱含并行性和全局最優化的能力，並且對尋優對象的要求比較低，在工程應用和科學研究中，得到了廣泛的應用，本文將遺傳演算法引入模糊模型的辨識，取得了很好的效果。
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