陷頻響應 的英文怎麼說
中文拼音 [xiànbīnxiǎngyīng]
陷頻響應
英文
notch response-
In recent years, the carst collapses that are occurring frequently in qixiashan hill area severely endanger the engineer and human life. there are many factors caused the occurring of the carst collapse in this area. besides the background of geology and geomorphology, the causes of changing of hydrodynamic, stress field of the earth s crust, and structure of rock and ground are more important
近年來，南京棲霞山地區巖溶地面塌陷頻繁發生，造成了巨大的經濟損失。巖溶地面塌陷的產生，除了地質地貌基礎外，更主要原因在於礦山開采改變了水動力條件地應力場及巖土體結構，尤其是礦坑疏干對水動力條件的影響最為顯著。On the base of the introduction to the development condition in jiangsu province, the author concentrates on the analysis on non - state middle school teachers in jiangsu province in the following aspects : i. comprehensive analysis on non - state middle school teachers in jiangsu province, including the analysis on the general condition and the structure of non - state middle school teachers in jiangsu province, comparative analysis on non - state middle school teachers and state middle school teachers ; ii. case studies on the teachers " psychology and management strategies, including the analysis on common mentality of benefit, belonging, anxiety, employee and conjecture, the analysis on the corresponding measures taken by the school managers ; iii. ponder the exiting problems of non - state middle school teachers on the base of the comprehensive analysis and the case studies, resting with the negative effects to the construction of non - state middle school teachers caused by serious system obstacles, over flow of teachers, different motivation of the school runners and the management faults
論文在簡要介紹江蘇省民辦中學發展狀況的基礎上，著力從下列幾個方面對江蘇省民辦中學教師隊伍進行分析：一是對江蘇省民辦中學教師隊伍現狀的綜合分析，包括對江蘇省民辦中學教師隊伍總體狀況的分析、結構狀況的分析、民辦中學和公辦中學教師隊伍狀況的比較分析；二是從教師個體心態與管理者策略的角度對江蘇省民辦中學教師隊伍狀況的案例分析，包括對民辦中學教師中普遍存在的利益心態、歸屬心態、憂患心態、打工心態、揣摩心態的分析，並分析了學校管理者採取的相應措施；三是在綜合分析和案例分析的基礎上對民辦中學教師隊伍存在問題的原因進行深入揭示，著重分析嚴重的體制障礙、過于頻繁的教師流動、學校舉辦者不同的動機、民辦中學管理上的缺陷對民辦中學教師隊伍建設造成的負面影響；最後從完善教師資格認定製度、強化教師資源配置的市場機制、健全教師社會保障體系和推進民辦中學教師的道德建設和專業化建設等方面提出加強民辦中學教師隊伍建設的政策建議。Modal analysis, frequency response analysis, random vibration analysis and vibration fatigue analysis are carried out based on the modified finite element model. the first natural frequency of pcb is 57 hz, and the dynamic response in the first natural frequency is the largest. weak points are also found
為分析該印製電路板可靠性及設計缺陷，需對修改過的有限元模型進行模態分析、頻率響應分析、隨機振動分析及疲勞壽命分析，以全面了解該印製電路板的動態特性（包括:印製電路板的固有頻率、隨機振動響應情況） ，以及存在的薄弱環節。( 2 ) because of t he variability of rock subjected to outside action, three new conceptions : postive damage basic damage and negative damage, are suggested, which can deal with the condition that rock density became large. ( 3 ) the present damage variables based on ct number mostly include ct average number of the rock without damage, which is difficult to measure, so a new damage variable, which includes the average ct number is proposed, on the other hand, strain equal theory is generalized because the one put foreword by lemaitre is not good enough to use. ( 4 ) a axial damage constitutive equation is proposed and testified. ( 5 ) with the circle times, the damage propagation laws of two different rocks, subjected to circle of freezing and thawing, are studied, and in the analysis process, traditional analysis method including average ct number and is used, some important conclusions are reached : inner damage of soft rock containing a large mount of apertures is largely propagating with the time increasement of circle, however, at the preliminary time, the hard rock containing a small mount of aperture is a little propagating, at late time, the influence become large ; ( 6 ) zone separation and statistics frequency put forward is used to analysized the three different damage propagation in the open circumstance, when they are subjected to the different circle times of freezing and thawing, in which the temperature variability is linear, different freezing rate, and different freezing temperature, and no water is supplied during the test
在研究過程中本文主要做了以下工作： （ 1 ）針對巖石損傷變化較小時，運用ct均值和方差分析不方便的缺陷，本文提出運用對ct數范圍劃分區段的方法，根據各區段統計頻率的變化規律來分析損傷擴展狀況； （ 2 ）針對巖石受到外部作用的多變性，本文提出了基準損傷，正損傷，負損傷的概念，在某種程度上考慮了巖石受到外部作用時的壓密情況； （ 3 ）現有的基於ct數的損傷變量大多需要用到巖石基體的ct均值，這實際上是很難觀測到的，因此本文建議了一個可運用巖石初始狀態ct均值的損傷變量，由於現有的勒邁特教授應變等價原理使用上的不便，本文在其基礎上進行了推廣； （ 4 ）建議了一個可用巖石初始狀態ct數和彈性模量的單軸損傷本構方程，並用算例進行了驗證； （ 5 ）對兩種不同巖石在開放環境下受到凍融循環作用且融化過程中補水時，內部損傷隨凍融循環次數增加的擴展規律進行了探討，主要運用了常規的ct均值和ct方差的分析方法進行分析，試驗發現：對于孔隙率和含水率較高，密度和強度較低的軟弱巖石，凍融循環次數對損傷結構的擴展有明顯的影響，而對于孔隙率和含水率較低，密度和強度較高的硬巖，凍融循環次數對其損傷結構擴展初期由於含水率低的原因，影響不是太大，而後期由於水補給后，含水率較高的原因，凍融影響逐漸增大； （ 6 ）運用了本文提出的區段劃分和統計頻率的方法，深入地分析了開放環境下的線性溫度變化的凍融循環次數，凍結溫度，凍結速度不同巖石作用時，其內部損傷隨凍融循環次數，凍結速度和凍結溫度變化的擴展規律，需要指出的是除了在試驗前飽水外，凍融過程中沒有補水。分享友人