profile accuracy 中文意思是什麼
profile accuracy
解釋
齒廓精度-
In this paper, high - order accurate weighted essentially non - oscillatory ( weno ) schemes are investigated and their applications in hyperbolic conservation laws are discussed. based on this, a new weno difference scheme which based on dispersion - relation - preserving relation is developed, and representative test cases with this scheme for computational aeroacoustics ( caa ) problems has been implemented and compared in order to test capability of wave capturing ; in addition, weno schemes generally do not converge at high order in the presence of contact discontinuity of euler equations, so a conservative front tracking technique coupling weno schemes and level set method to simulate the translating density profile is presented here, and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy
本文研究了高階精度加權基本無振蕩（ weno ）格式及其在雙曲守恆律方程中的應用，在此基礎上作了兩個方面的工作：一是針對高頻聲波問題構造出一種基於保色散關系（ drp ）的weno有限差分格式，並對計算氣動聲學（ caa ）問題的代表性算例進行了大量數值實驗，比較了該格式捕捉波數的能力；另外，針對高階weno格式在處理euler方程的接觸間斷時精度有所降低的問題，研究了利用界面追蹤技術levelset方法和高階激波捕捉weno格式相結合的一種守恆追蹤方法，並且給出有代表性的密度滑移面問題的算例，得到一致高階精度的數值模擬結果。 -
Besides, the information on actual height of lowest cloud base is used in constructing of cloud liquid water profile by using radiosonde profiles, that makes an improvement of relative accuracy of retrieved value of l at almost all altitudes by 5 - 20 % according to numerical simulation comparison. the lower the altitude is, the more the accuracy is improved
為減少由於回歸樣本中雲液水廓線的『失真』給反演造成的誤差，本文在對探空廓線作診斷建立雲液水廓線時，引入了實際目測的最低雲底高的信息。數值模擬比較表明該措施行之有效，使對流層中下層的幾乎所有高度上l反演值的精度提高5 - 20 ，觀測高度越低，精度提高越多。 -
The results are as follows : ( 1 ) based on soil temperature data measured at different time in the field, soil temperature characteristics under plastic mulch were analyzed at four locations : the middle, the edge, in - between the plastic film and uncovered spot ; the characteristics of soil temperature profile from 0 to 25cm depth and the correlation of soil temperatures in different soil layers were studied at different time with and without plastic mulch ; on the basis of analyzing temporal and spatial variations of soil temperature in a corn field, the relations between soil temperature and air temperature were established, and a new method that only uses air temperature to predict soil temperature profile at different time is proposed. the predicted results showed good accuracy
成果如下： （ 1 ）根據大田實測地溫資料，分析了覆膜條件下膜中、膜邊、膜間和揭膜四種處理在早、中、晚三個不同時刻的地溫特徵；分析研究了各觀測時刻覆膜與不覆膜條件下0 25cm剖面地溫的特點及各層地溫間的相關關系；在重點對玉米田地溫時空變化特徵分析的基礎上，首次將覆膜與不覆膜不同時刻觀測的剖面地溫與氣溫建立了聯系，提出了僅根據氣溫資料來預測一日內不同時刻剖面地溫的新方法，預測結果表明其精度較高。 -
Thirdly, the conclusions of the two aspect applications are given as follows : the exploration of the application of the evaporation duct prediction to the flux relationship research and evaporation duct predicting shows that based on this predicting method and with microwave refractometer, as sensor, ( 1 ) the dimensionless gradient function of temperature, humidity and refractivity in the flux relationships can be determined with higher precision, ( 2 ) the limitations of conventional observations on the predicting accuracy for evaporation duct can be avoided and the precise prediction for evaporation duct can be obtained with the accurate measurement of refractivity profile within a few meters. the radar performance under given evaporation
三、對兩個應用問題的討論表明：基於本文發展的蒸發波導預測理論，使用微波折射率儀為傳感器： （ 1 ）開展通量關系研究時，可以用於邊界層溫度、濕度和折射率無量綱梯度函數的精確測定和得到蒸發波導環境預測所需的偽折射率參數化函數關系； （ 2 ）預測蒸蒸發波導環境特性和傳播特性及其應用研究發波導環境時可以避免使用傳統氣海界面要素測量中存在的局限，並用折射率音d面不太高的精確測量結果精確預測蒸發波導環境。 -
Objective : to assess the diagnostic accuracy of ece for barrett ' s esophagus ( be ), erosive esophagitis, and hiatal hernia and to assess the safety profile of ece
目的：評估ece對于巴雷特（氏）食管病，腐蝕性食管炎以及食道裂孔疝診斷的準確性及其安全性。 -
During the course of information recommending, the thesis combines content - based filtering with collaborative filtering to find particular information for each user, and it also presents different collaborative filtering strategies. in personalized information retrieval, the thesis takes advantage of the user ' s profile which describes particular user ' s information needs to filter useful information from the retrieval results for particular user and to enhance the accuracy of retrieval
與以往系統不同，系統無需用戶直接反饋，而是通過其對文檔的訪問頻度、駐留時間及操作行為等來隱式獲取用戶的評價信息；同時，系統也利用用戶候選興趣特徵向量來記錄和累計用戶潛在的、非主要的興趣的變化過程，精度更高。 -
Different results specify that the first kind of cost function is sensitive to the mismatch of ocean depth and receiver location, but is insensitive to sound speed profile ' s % $ jai8x9 @ t $ m & z mismatch and has high accuracy of depth localizaion ; the second kind of cost fimction is insensitive to all three kinds of mismatch, but its resolution of depth is very low ln order to overcome the cost function ' s sensitivity to mismatch, improvemedt of the accuracy of time delay estimation and model calculation may be adopted, when both conditions are reached, the sensitivity wiil be greatly reduced and the resolution of range and depth will be improved at the same time
模擬結果表明，第一類代價函數對海底深度和基陣傾斜失配是敏感的，對聲速失配卻不敏感，並且能夠獲得較高的深度定位精度；第二類代價函數對三種失配都不敏感，只是深度解析度較低。為了克服代價函數對失配的敏感性，可採用提高時延估計精度和模型計算精度的方法。當兩個條件滿足時，敏感性得到極大的抑制並獲得了較高的距離和深度估計精度。 -
The resonant three - wave model and laminar - turbulent velocity profile composed are used as a model of coherent structures in. turbulent flow. the forming and variation of turbulent coherent structures in the channel are simulated by the compact differential method with high accuracy and resolution derived in this paper
以共振三波和層-湍復合速度剖面作為湍流相干結構模型，採用文中所導出的高精度、高解析度的緊致差分方法，模擬了槽道流動在近壁區域湍流相干結構的形成和變化。 -
Then forty - six independent variables are studied with the help of the profile analysis and t test. furthermore, some financial ratios, which are grate different between the two groups for the years before the financial failure, are picked out to establish multi - variables model to forecast the financial failure in the method of logistic regression. and the model is proved to have good predictable efficiency and accuracy
其次應用剖面分析和t檢驗對選取的45個備擇變量進行研究，從中選出若干差異顯著的財務指標，採用logistic回歸的方法建立了多變量的財務困境預測模型，並且對該模型進行了回判檢驗，取得了較高的預測效果。 -
Abstract : in this paper, the fundamentals and method of longitudinal displace mentmeasarement utilizing laser doppler effect are introduced. the factors influencing the affecting accuracy are expounded. moreover, the theory analysis and experiment - based methods are offered to improve the accuracy. this study can be applied in analyzing the surface profile and distortion, which is very important in theory and practice for the fields of aviation, mechanical and architecture industries
文摘:介紹了激光多普勒縱向位移測量的基本原理和方法，闡述了影響測量精度的要素，並在理論分析和實驗的基礎上，提出了改進措施.該項研究可應用於分析物體表面輪廓和變形狀況，對航空、機械、建築等工業有重要的理論意義和實用價值 -
In this paper, the fundamentals and method of longitudinal displace mentmeasarement utilizing laser doppler effect are introduced. the factors influencing the affecting accuracy are expounded. moreover, the theory analysis and experiment - based methods are offered to improve the accuracy. this study can be applied in analyzing the surface profile and distortion, which is very important in theory and practice for the fields of aviation, mechanical and architecture industries
介紹了激光多普勒縱向位移測量的基本原理和方法，闡述了影響測量精度的要素，並在理論分析和實驗的基礎上，提出了改進措施.該項研究可應用於分析物體表面輪廓和變形狀況，對航空、機械、建築等工業有重要的理論意義和實用價值 -
To improve the accuracy of the evaluation and predicting of software reliability, this paper researches on the influence of the difference of profiles on the evaluation of software reliability by starting with the difference between the operating profile and the testing profile
實際上軟體的測試剖面和運行剖面是不同的，即測試可靠性和運行可靠性是有區別的。為了提高軟體可靠性評估和預測的精度，本文從研究軟體運行剖面和測試剖面的差異入手，研究剖面的差異對軟體可靠性評估的影響。
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