hilbert problems 中文意思是什麼
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Then, we investigate iterative methods in hilbert spaces for solving such problems in the second part
本文在第二部分討論了hilbert空間中均衡問題的近似迭代解。 -
Based on the examination of the number theoretic backgrounds of gauss and hilbert and the relevant mathematical development in 19th century, a discovery is made by induction that the solvability and the scientific value of mathematical problems may change with time
運用歸納方法，通過對高斯、希爾伯特兩人數論背景的比較以及對19世紀相關數學進展的考察，得出數學問題在不同歷史時期可解性及科學價值會發生改變的結論。 -
Using riemann - schwarz ' s symmetry principle of complex functions, the above problems are transformed into riemann - hilbert boundary problems. by combining the analysis of singularity of complex functions, generalized liouville ' s theorem, cauchy model integral and residue theorem, the general solutions of above problems are presented
創造性運用復變函數解析延拓原理，將上述問題轉化為riemann - hilbert邊值問題，結合復應力函數奇性主部分析方法、廣義liouville定理、 cauchy型積分和留數定理，獲得了上述問題的一般解答。 -
Secondly, hht that is one of the time - frequency representations ( tfrs ) is introduced in aspects of not only the theoretical analyses but also the programmer in matlab, including how to compute the instantaneous frequency, how to process the emd and how to dispose hilbert spectrum, after that bring forward the resolve to the problems during the processing of emd
其次，介紹了hht時頻分析方法，包括理論分析與演算法的matlab編程。其中從瞬時頻率求解、經驗模式分解和hilbert譜繪制幾個方面分析了hht ，同時提出了經驗模式分解過程中邊緣處理和固有模態準則確定中存在的問題，並給出了解決方法，改善了hht的分析效果。 -
The study state of art and development trend of structural damage identification research is simply summarized in this paper. hilbert - huang transform ( hht ) is applied to the damage identification and intrinsic frequency confirmation of time - variable structures. furthermore, a kind of inverse calculation is presented to calculate structural stiffness. this method can solve three main problems : the time that damage occurred, the location and the degree of damage
本文簡要總結了結構損傷識別領域的研究現狀和趨勢，圍繞損傷引起固有頻率變化這個特徵，將希爾伯特?黃變換（ hht ）應用於時變結構的損傷識別和損傷前後固有頻率確定上，並結合牛頓迭代法，對結構剛度進行反演計算，從而解決結構損傷識別領域所關注的三個主要問題:損傷發生時間、損傷位置以及損傷的程度。 -
Study on the problems in extracting instantaneous characters of signals based on hilbert transform
變換提取信號瞬時特徵參數的問題研究
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