biased data 中文意思是什麼
biased data
解釋
邊緣數據-
Even in those quite rare cases where currency exchanges are unrestricted, conversion of income data between currencies is biased.
甚至在那些貨幣兌換不受限制的罕見情況下，收入數據在不同貨幣間進行換算，依然會有偏差。 -
Sequence variation analysis exhibits high transition to transversion substitution ratios, and transitions and transversions are unsaturated in the sequence of cytochorme b gene. the base composition of the cytochrome b sequences was highly biased. using a structural model of the cytochrome b protein as a template, we divided cyt b sequence data for species within anserifomes into three functional domains
3 ）序列具有較高的轉換顛換比，基因序列中的轉換與顛換都未飽和，序列中的堿基組成高度偏倚： 4 ）按照細胞色素為蛋白結構模型，細胞色素b基因全序列可分為三個功能區，堿基替換飽和狀況與不同功能區相關聯。 -
In order to get this, some useful explorations on how to analysis and solve the problem of the ill - conditioning have been made and several biased estimators have been put forward. in fact, analyzing the essence, overcoming the effect of ill - conditioning and obtaining more accurate and stable parameters estimator is an new task in gps surveying data processing, which have been determined as an important studying field in contemporary surveying error theory and engineering data processing by the international association of geodesy ( iag )
事實上，分析測量平差系統病態性的實質、克服或減弱測量平差系統病態性的影響、採用有偏估計等方法提高參數估計和平差成果的精度，是當前gps等重大測量工程數據處理中所面臨的一個重要課題，它已被國際大地測量協會（ iag ）確立為現代測量誤差理論及數據處理研究中的一項重要內容。 -
A new biased estimator so - called ridge type - generalized inverse ( rg1 ) estimator is constructed after summing - up the historical and present condition of biased estimation theory in surveying data processing. the prosperities of rg1 estimator are studied especially by pitman ' s criteria. the other biased estimator so - called partial root root ( prr ) estimator is generated
通過對有偏估計理論在測量數據處理中的應用歷史和現狀進行總結和分析，構造了未知參數的一種新的有偏估計方法? ?嶺型廣義逆估計，對其性質特別是在pitman準則下的若干性質進行了討論；接下來構造了另一種新的有偏估計方法? ?部分根方估計，該估計的最大特點在於它是一種部分壓縮估計。 -
Study the spectral de - aliasing method of image restoration in frequency domain, and offer the improvement with block processing and recursive rstoration to some problems. at the same time, the biased estimate theory is applied in the restoration processing. these improved steps increase the value in the use of data and decrease the time of computation
2 、研究了基於頻率域的解頻譜混疊方法，針對該方法存在的問題，分別提出了分塊重建和循環重建，提高了重建的效率；並將有偏估計用於重建理論中，提高了影像數據的利用率。 -
First, the standard errors computed under the assumptionthat the error term is independent identical distribution will be biased. second, theassumption of independence is unlikely to satisfied. in the panel data analysis modelwith hierarchical structure, hierarchical effects, nested effects, time effects are seted. then the dissertation deduced parameter estimation and hypothesis test statistic andits probability distribution and analyze the hierarchical panel data set : eastern china, central china and western china are the top level, and the prc ’ s province, cities, and autonomous regions are bottom level
然後針對目前面板數據分析過程中存在的兩方面問題，即一方面在利用面板數據模型進行分析時，標準誤差的計算是基於誤差項相互獨立並且同分佈的假設，如果誤差項是相關的將會造成估計有偏的後果;另一方面關于獨立性這一假設本身就難以滿足;提出多層嵌套面板數據模型，設定了層效應、嵌套效應以及時間效應參數，研究了多層嵌套模型的參數估計量和假設檢驗統計量及其分佈。 -
This study used food surveillance data which might produce biased results in dietary exposure assessment, as they were examined chiefly for enforcement purpose and might contain higher levels of contaminants
是次採用的食物監察數據主要是作執法用途，食物樣本的污染物含量水平會較高，因此會造成偏差，影響評估結果。 -
In chapter 3, we discuss the problem of doa estimation in the presence of spatially nonstationary noise fields. an estimate of the colored noise covariance matrix is firstly given. the received data for parameter estimation is then prewhitened using the estimated noise covariance, hence, overcoming the highly biased estimates. finally, adaptive beamforming with the modified weight is also performed. computer simulations show that the proposed method can completely remedy beam distortion. 3
在第三章討論了一種在環境噪聲為白噪聲而陣元噪聲為空間非平穩情況下的doa估計問題，給出了一種有效的估計陣元噪聲功率的方法，進而利用估計的噪聲協方差矩陣進行預處理而實現色噪聲環境下的doa估計，理論分析和模擬結果均表明了本章提出的方法的有效性。 -
Was caused by biased data from the ground,
是在地磁干擾之下
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