參比峰位 的英文怎麼說
中文拼音 [shēnbǐfēngwèi]
參比峰位
英文
reference peak location-
Our treatment shows in the raman effect case, mnls solitons, the same as nls solitons, keeps its energy, initial center and initial phase unchanged. however, the raman effect, not the same as nls solitons. reduces its amplitude, widens its width and under the same conditions, the self - frequency shift of mnls soltions is closer to the result of numerical simulation. in the raman effect together with frequency filters case, mnls solitons, the same as nls solitons, keeps initial center and initial phase unchanged and bandwidth - limited frequency filters can make the mean frequency of mnls soltion stand a steady value at the red side of the initial mean frequency, i. e. suppress the self - frequency shift of mnls soltions. and that, the other physical parameters of mnls soltion last stand a steady value. however under the same conditions, the steady value of the mean frequency of mnls soltions is closer to the initial mean frequency and the result of numerical simulation
有所不同的是， raman效應雖然不改變孤子能量，但會引起孤子峰值的下降和寬度變寬，且在同一條件下， mnls孤子微擾理論得到的自頻移比nls孤子微擾理論得到的更接近直接數值計算結果。有限帶寬的頻率濾波也不引起mnls孤子初始中心、初始位相的改變，選取適當的頻率濾波器參數值能使孤子的平均頻率穩定在初始平均頻率的紅側一穩定值，抑制了自頻移，而且孤子的各物理量最後都穩定在一穩定值，這些與nls孤子微擾理論都是類似的。有所不同的是，寬度為飛秒量級下， mnls孤子平均頻率的穩定值更接近初始平均頻率，更接近數值計算結果。4. achieved the high - speed colliding experiment of landslide for the first time, the paper studies the volume distributing ruler of different velocity segment after collide, fits the experiment data via extreme function, obtains the value range of the shape parameter, thereby gets the distributing function of all part of landslide after collide. on the base of above, the paper studies the accelerating effect of partial rock - mass because of colliding, and acquires the relation between accelerating volume and overall volume, and colliding velocity
（ 4 ）首次進行了滑坡巖體的高速碰撞模型實驗，研究了碰撞解體后不同速度段巖體體積的分佈規律，並應用峰值extreme函數對實驗結果進行了數據擬合，確定出了各形狀參數的取值范圍，從而得到了滑坡巖體高速碰撞后不同塊體的分佈函數，並在此基礎上研究了滑坡巖體碰撞後部分巖體的加速運西南交通大學博士研究生學位論文第2頁動效應，得出了獲得加速的巖體比例與滑坡總體積及碰撞速度的關系。In the plate region of a vehicle image, the gray value varies frequently in cross - direction, so we define a parameter ". cross variance " to describe it. we also calculate other parameters to approximately locate the plate, they are the space length between two chars, the thickness of stroke, the peak and trough of gray value, the ratio of width and length, etc. at last, we exactly locate the plate by the theory of mathematical morphology
該方法根據圖像車牌區域橫向灰度值變化頻率比較大這一特徵提出了橫向方差參數，並結合車牌的字元間距、筆劃粗細、灰度峰谷值、長寬比值等特徵粗定位車牌，在車牌的精確定位中利用了數學形態學的方法。我們從某高速公路收費站實地拍攝的照片中選取了1000多幅作為實驗樣本數據。Thirdly, a modified extended chirp scaling ( ecs ) algorithm is presented, which solves the problem of producding fine focused images in the class of chirp scaling ( cs ) algorithm. lt can be used for uwb - sar imaging effectively. the phas e error produced by cs operation are analyzed. a windowed process in two dimension frequency domain before cs operation are proposed. it can improve the quality of image and widen the effectively swath and increase the peak to sidelobe ratio ( pslr )
然後針對chirpscaling （ cs ）類演算法不能對參考點精確聚焦的問題，提出了一種改進的擴展cs （ ecs ）演算法，實現了對uwb - sar的高效成像；分析了cs操作產生的相位誤差，提出在cs操作之前在二維頻率域對信號加窗，除有效提高信號的峰值旁瓣比（ pslr ）外，還可以提高圖像質量，增加有效測繪帶寬度。In the end, a new reliale indicator, energy peak, is found to used to estimate damage. its three parameter : peak time, peak frequence and peak power are also evaluated. this study improves monitoring equipment in intelligence, low power dissipation and security
作者最後利用脊髓在受不同程度損傷下的脊髓誘發電位的時頻分布圖，比較時頻分佈和時域上的各參數的變化，找到了新的損傷判定的特徵指標：峰值能量，及其三個參數:峰值時間、峰值頻率和峰值功率。L. the paper studies the theory to detect damage of bridges, and compares many sensitive parameters to detect bridge damage through correlative literature all over the world, finally concludes it suitable that bridge damage is detected by strain mode parameters. the strain mode parameters satisfy four foundstiona. l conditions as follows : ? hey are sensitive to sectional damage and they are monotone function of structure damage. @ they have determinate location coordinate
論文通過對國內外橋梁損傷檢測方面的文獻資料研究，探討了識別橋梁損傷的基本理論，比較了多種結構損傷敏感參數識別橋梁損傷的優缺點，最後確定用應變模態參數識別橋梁結構損傷較為合適，應變模態是對損傷敏感的參數，滿足四個基本條件：對局部損傷敏感，且為結構損傷的單調函數；具有明確的位置坐標；在損傷位置，應變模態差曲線出現明顯的峰值變化；在非損傷位置，應變模態差曲線的變化幅度小於預先設定的閾值。分享友人