three-factors of sound 中文意思是什麼
three-factors of sound
解釋
聲音三要素-
This article describes a way of special ultrasonic system which monitors thermal stress in seamless welded rails. this monitoring system is a non destructive testing system, which adopts avr mcu and high - precise time chip processing as the core of it, and adopts the critically refracted longitudinal wave as the object of measuring. my studying focuses on the theory of the monitoring system, which will be listed in this arctile : according to the snell theory, the theory of motivating of critically refracted longitudinal wave is described in details, and the finite element software is used to emulate the propagating course. the formulas of calculating the pts of swr are taken from the acoustoelasticity theory, and the calculating the parameters is introduced. according to assemble materials, three kinds of ways of monitoring the pts of swr using critically refracted longitudinal wave are described, which are measuring the sound - time in changeless distance, ultrasonic critical - angle refractomery and frequency spectrum, the first way of ways is used in this experiment system. the factors, which effect the monitoring system, are assaid in some degree based
本文的研究工作重點在無縫焊接鋼軌溫度應力測量系統的理論模塊，包括根據snell原理，研究極限折射縱波的激發機理，並使用有限元軟體ansys進行模擬;根據聲彈性理論以及公式推導出計算無縫焊接鋼軌中的溫度應力的公式，並對其中參數的求解方法進行介紹;根據收集的資料，介紹了三種使用極限折射縱波測量無縫焊接鋼軌溫度應力的方法，即固定距離測量聲時法、臨界角折射法和頻譜分析法，本實驗系統使用的是第一種;根據實驗經驗以及相關資料，分析了影響極限折射縱波測量溫度應力的幾個因素，並提出了相應的解決方法;根據實驗系統的需要，獨立設計並加工出相關配套的實驗設備，包括實驗鋼塊、有機玻璃楔塊、固定件、載荷外框裝置等。 -
Started from the fact that the " three forces " exert great impact on the five countries in central - asia and direct threat to the political stability in our country ' s neighboring regions, the end of the thesis advances that related measures should be formulated to strictly prevent and strike the " three forces " form the view of keeping the stability of the remote areas, meanwhile, more research should be done on the factors that may influence the developing western area by the neighboring countries with the view of global politics and new development in the new era and grasping the historic opportunities of developing western area, so as to shape a sound neighboring environment, safeguarding the strategy of developing western area being smoothly carried on, accelerating the economic development in the western area and raising people ' s living standard in the true meaning
結語部分從「三股勢力」對中亞各國形成的強烈沖擊及直接威脅我國周邊地區政治穩定的事實出發，強調從維護邊疆穩定角度，應該制定相應的措施嚴密防範，對「三股勢力」進行嚴厲打擊，同時要從全球政治和新世紀發展的角度認識並抓住西部大開發的歷史機遇，加大對我國周邊國家影響西部大開發諸多因素的研究，營造良好的周邊環境，保障西部大開發戰略的順利實施，從而加速西部地區的經濟發展，真正提高人民的生活水平。只有這樣，才能增強我們多民族國家凝聚力，有效地抵禦各種勢力的滲透和影響。
分享友人