first maximum principle 中文意思是什麼

first maximum principle 解釋
第一極大值原理
  • first : adj 1 最初的，最早的。2 最上等的，第一流的。3 基本的，概要的。4 高音（調）的。n 1 最初，第一；第...
  • maximum : n （pl maximums ma ） 極點，最大，最高，最高額，最大值；最高點；最大限度；【數學】極大（值）（opp...
  • principle : n. 1. 原理，原則。2. 主義；政策；〈常 pl. 〉道義；節操。3. 本質，本體，根源；本原，源泉。4. 本性，本能；天然的性能；天賦的才能；動因，素因。5. 【化學】素，要素；精。
  1. Particularly four following respect problems of main research of this thesis : first, excavating and optimizing of the road bed and the slope protect, on the basis of influence factor analysis and the slope design principle by the expressway of mountain area of limestone, we excavate the model of optimizing after putting forward the road bed which is suitable for the expressway of mountain area of limestone, through employ this optimize model, we can reduce the amount of road bed excavate, thus maximum reducing slope excavate destruction to environment and pollute ; according to limestone mountain area expressway characteristic of the cutting slope, we use the law of finite element and rmr of revision carry on stability analyze and appraise to their side slope ; combine the limestone rock body characteristic of mountain area, we have analyzed the corresponding side slope safeguard procedures

    論文主要研究了以下四方面問題:第一，路基開挖優化。在分析石灰巖山區環境特徵的基礎上，探討了石灰巖山區路線設計的原則與方法;在應用有限元數值分析方法對邊坡的開挖穩定性進行分析的基礎上，提出了陡開挖強支護的石灰巖山區高速公路的路基開挖方式，並建立了填挖平衡，開挖面積最小的石灰巖山區高速公路的路基開挖量優化模型;結合石灰巖山區巖體特性，探討分析了相應的邊坡防護措施。第二，土石方處理及自然水系調治恢復。
  2. Space - time block codes ( stbc ) based on orthogonal design has attracts enough attentions in its applications in mimo - ofdm systems for its full diversity exploiting and low coding / decoding complexity. these applications include not only system performance improvement, but also reduction of the peak to average power ratio in mimo - ofdm systems. under these backgrounds, this paper first studies space - time block codes under the single carrier, flat fading situation, discusses the encoding / decoding principle and its performance under different channels. then, the author focused on the performance of space - time codes under time selective and frequency selective channels, uncovered the fundamental cause of how maximum doppler shift and power delay profile influences the performance of space - time codes through deduction and simulation

    在上述背景下，本文以單載波，平坦衰落通道下的空時分組碼為切入點，深入分析了其編譯碼原理和在不同通道情況下的性能;以此為基礎，後文展開了對空時分組碼在多載波，時間選擇性和頻率選擇性衰落通道下的性能研究，通過理論推導和充分的模擬，揭示了空時/頻分組碼在時頻選擇性衰落通道中的性能變化的根本原因;在以上對多載波系統中空時分組碼的研究的過程中，作者發現了空時分組碼在降低系統峰平比方面應用的可行性，提出了一種降低峰平比的新方法。
  3. Since airport opening in 1998, the methodology of alerting windshear at the hong kong international airport has been based on the so - called first encounter, maximum intensity principle, which was adopted for use after consultation with the local aviation community

    自一九九八年香港國際機場啟用以來，機場的風切變預警一向是基於所謂"首次相遇位置、最大強度"的準則發出的。這是徵詢本地航空界意見后而採用的。
  4. As an example, under the windshear conditions depicted in the figure below where there is a windshear event of 15kt at 3 mile final and a microburst event of 30kt at 1 mile final, the consolidated windshear alert based on the first encounter, maximum intensity principle will be

    下圖例子顯示跑道進場3海里處出現了15海里小時風切變的事件，於1海里處同時出現- 30海里小時的微下擊暴流。根據"首次相遇位置最大強度"的準則，風切變預警應為：
  5. This paper deals with the existence of two positive solutions for critical elliptic equations with a changed sign perturbation and with an auxiliary condition. first of all, the super - sub - solution can be obtained by this positive solution and by the auxiliary condition if perturbation is the positive side of the changed sign perturbation, and then the equation has a positive solution by the method of monotone in teraction and by the maximum principle. because that the positive solution of the equation isnt monotone to parameter. although all of the equations have a positive solution to two given parameters, the existence of the positive solutions of its equation to a parameter between the two given parameters cant be proved. finally, if the first positive solution exits the second solution for the equation can be proved by the mountain pass lemma. 7refs

    討論了帶變號擾動並且具有一定附加條件的臨界橢圓方程的兩個正解存在性.首先由變號擾動的正部對應的方程的正解和附加條件構造出原方程的一個上、下解，再由迭代方法和極值原理得到方程的第一個正解.考慮到方程的正解對參數沒有單調性，因此，即使對于兩個使得方程都有正解的參數，但在這兩個參數之間的參數對應的方程不一定有正解.最後，如果方程存在第一個正解，那麼由山路引理可得到方程的另一個正解.參7
  6. First, the maximum principle is used to generate an optimal guidance law for lunar landing, and the tpbvp is to be solved as a result of the numerical solution for optimal trajectory

    文中首先應用極大值原理設計了最優著陸制導控制律，此時求解最優軌跡變成一個兩點邊值問題（ tpbvp ） 。
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