陡后沿 的英文怎麼說
中文拼音 [dǒuhòuyán]
陡后沿
英文
stetrailing-
We apply the agrawal ' s theory model of soa, and study the temporal characteristics of the output pulse for input picosecond optical pulses with different sharpness edges passing through a semiconductor optical amplifier, and find that the peak power and the pulse width of the output pulse depend on the input pulse peak power, the sharpness degree of the input pulse edge and the bias current of soa
本文應用agrawal的關于soa理論模型，詳細研究了具有不同陡峭邊沿的皮秒超高斯光脈沖經soa后的時域特性的變化，發現輸出脈沖的峰值功率、脈沖寬度與輸入脈沖的峰值功率、輸入脈沖邊沿的陡峭程度以及soa的偏置電流密切相關。According to the geological data which was gained by exploration investigation, establishing a geological model which can reflect rock mass characteristics ; with analyzing the internal and exterior factors synthetically, the deformation and possible failure mechanism and mode of the cut slopes was confirmed which combines with stereoic projection and other techniques ; the stabilities of the 14 high slopes are estimated synthetically by applicable design codes and guidelines. with the estimate result and some other analysis methods, the rock mass mechanical parameters of slope are identified ; as a results, 14 high slopes fall into 4 categories based on rockmass characteristics and discontinuities. the stability and deformation of some typical slopes was analyzed with distinct element method by udec ; the safety factor of some dangerous slopes are calculated by rigid limiting equilibrium method for comparison
首先著重研究影響邊坡穩定性的內在因素，主要是通過地質勘探、測量、現場觀測等手段取得研究區地質體的基礎地質資料，建立起能夠反映地質體結構特徵的地質模型;隨后綜合分析潛在的內外部影響因素，並結合赤平投影對邊坡可能的失穩模式或破壞機製作出判斷;運用已有巖體質量分類方法對沿線14個高陡邊坡穩定性進行初步的評價，並結合試驗研究、經驗判斷、工程類比等手段確定了坡體的巖體力學參數;根據穩定性初步評價結果將研究區14個高陡邊坡按開挖方式分為4大類，並利用離散元程序udec對各類典型高陡邊坡進行了穩定性計算分析;對潛在危險邊坡利用剛體極限平衡法求出了不同工況下的安全系數。At present, signal pulses produced by directly modulated laser diodes have been used in optical fiber communication systems. the experiment reveals that the optical pulses from directly modulated laser diodes are far from gaussian and have near - rectangular temporal profiles with much sharper leading and trailing edges, and then a super - gaussian model, which assumes that an incident optical pulse has a super - gaussian profile, may be more suitable
但在實際的光通信系統中，人們常採用由直接調制半導體激光器產生的光脈沖作為信號脈沖，而實驗結果表明這種脈沖具有比高斯脈沖更為陡峭的前沿和后沿，其脈沖形狀更接近於超高斯分佈，並且通常還帶有一定量的啁啾。It reveals that the slope stability is mainly controlled by a set of joingts nearly parallel to the slope surface with a moderate to gentle dip angel. obvisouly, its persistence ration is the most important factor among all th e charatcteristics related to the stability analysis. on the other hand, the nature slopes and the excavated ones show a series superficial deformation and failure phenomena related to unloading process and time - dependent deformation, which are all described and recorded in detail in author ' s work
經過現場地質調查發現，邊坡中一組sn向中緩傾角結構面對邊坡的失穩具有控制意義，它的存在導致了邊坡可能的失穩模式為平面滑動，即當坡腳被剝蝕或進行切腳開挖時，發生沿邊坡內sn向中緩傾節理滑移，沿后緣陡裂張開的一種滑動失穩模式。The results showed that quasi - isentropic compression energy waves were produced after the impact with mg - face of the flier - plate, whose initial velocity jump, peak velocity and front ' s rise - time were all different from the general shock loading wave profiles
結果表明，梯度飛片正向擊靶后產生的是波陣面明顯被展寬的準等熵壓縮波，準等熵壓縮波的初始速度跳躍、速度峰值和波陣面前沿的上升時間都呈現出不同於傳統沖擊波陡峭上升波形的特徵。The results showed that quasi - isentropic compression energy waves were produced after the impact, whose initial velocity jump, peak velocity and front ' s rise - time were all different from the general shock loading wave profiles. furthermore, the higher the impact velocity, the smaller the extended wave ' s front while the higher the peak velocity
結果表明，梯度飛片擊靶后產生的是波陣面明顯被展寬的準等熵壓縮波，準等熵壓縮波的初始速度跳躍、速度峰值和波陣面前沿的上升時間都呈現出不同於傳統沖擊波陡峭上升波形的特徵。分享友人