波段選擇 的英文怎麼說

中文拼音 [bōduànxuǎnzhái]
波段選擇 英文
band selection
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 段 : Ⅰ量詞（部分） section; segment; part; paragraph; passage Ⅱ名詞（姓氏） a surname
  • 選 : Ⅰ動詞1. （挑選） select; choose; pick 2. （選舉） elect Ⅱ名詞（挑選出來編在一起的作品） selections; anthology
  • 擇 : 擇動詞（挑選） select; pick; choose
  • 波段 : [電學] wave band; wave range; band; range; frequency range; frequency band
  • 選擇 : select; choose; opt; election; choice; culling; alternative
  1. And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed

    研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。
  2. The initial vsd process uses two main characters, the average instantaneous energy and the average instantaneous zero crossing rate ( zcr ). to make the first recognition for the start and the end, the emphasis of which is to select the appropriate value of the threshold and the length of frame. in the final vsd process, the author compares several characters and confirms the new recognition character

    初步分段過程使用了能量和過零率這兩個主要特徵進行端點檢測，重點是合理選擇兩個重要參數? ?門限和統計幀長度的取值；在最終分段過程中，筆者首先通過比較幾種特徵的識別效果，選擇卡爾曼濾波參數作為再次分段的識別特徵，還提出了一種新的識別特徵? ?周期性緩變特徵，使用這兩個特徵分別在子語音段內進行端點檢測。
  3. However geological information is fully recorded in the remote sensing image, which made it possible for the choosing of this area as a dissection point to extract complex structural information of orogenic belt in west china. taking fully advantage of multi - band image richly bearing concealed geological information in combination with remote sensing analysis and structure analysis, to anatomy the supracrustal composition and structure of orogenic belt with the regional linear structures and their partitioned block and schistous geological masses as the macro - frame ( in corresponding to structure units and structure segments ) and with the rock masses, structure - rock assemblages, line - featured and belt - featured structures as well as penetrative and non - penetrative foliation ( primary stratum and trans position layering ) and folds as the texture and structure elements. the methods of how to distinguish granulite > ductile - shear zone, imposed fold, different deformed belts -

    因而，本文選擇這一地區作為我國西部地區從遙感圖像上提取造山帶復雜結構構造信息的解剖區，充分利用遙感圖像多波段反映物質屬性的特點和圖像處理提取隱含信息的優勢，採用遙感解析?構造解析相結合的研究方法，以區域線狀構造及由它劃分的塊狀、片狀地質體為宏觀骨架（對應于構造解析劃分的構造單元、構造均勻區段） ，以地質體中的巖石巖體、構造巖石組合，線狀、帶狀構造，透入性、非透入性面狀（原始層理、新生面理）和褶皺等構造作為用於解析的結構構造要素，進行造山帶表殼組成和結構構造解析研究。
  4. Partial radiation pyrometers are sensitive to narrow selective wavebands.

    部分輻射高溫計在窄的選擇波段上是靈敏的。
  5. Study on optimal bands selection of multi - spectral remote sensing data

    多光譜遙感數據最佳波段選擇的研究
  6. Firstly. operation principle of induction heating is introduced and the actuality of the power supply for induction heating is summarized. then, the scheme of structure of the power supply is established : uncontrolled rectifier and buck chopper constitute dc circuit. in this part, operation principle of a kind of soft switching buck chopper is presented mainly and the conclusion that the power semiconductor devices operate in soft switching is also illustrated by analysing the operation principle of all stages ; series resonant inverter is selected as inverter circuit via comparing the advantage and shortcoming of parallel resonant and series resonant. moreover. the work principle of series resonant inverter is analysed and the calculating method of the best dead time is put forward as well

    文中首先介紹了感應加熱電源的工作原理並綜述了國內外的研究現狀。接下來分析並制定了電源主電路的構成方案：在對比幾種功率調節方式的基礎上選擇了不控整流加斬波調壓作為直流部分。在這部分里，重點研究了一種軟開關buck變換器，通過分析各階段的工作原理說明了開關器件如何工作在軟開關狀態；對于逆變器部分，在比較了串、並聯逆變器優缺點的基礎上選擇了串聯諧振逆變器，並詳細分析了串聯逆變器的工作原理，提出了最佳死區的計算方法。
  7. Select installation and then antenna setting, and set respectively the local oscillator frequencies of the high - frequency tuner of 146, 138ku, 138c band and so on

    選擇安裝里的天線設定，分別設置146 、 138ku及138c波段等等的高頻頭本振頻率。
  8. In this paper, the target radiate characteristics and waveband selection of the infrared system reviewed briefly ; the suppression of the stray radiation in the infrared sub - system is discussed ; the material selection, the support structure and optimization of the primary mirror in the infrared sub - system of the theodolite, every factor which will affect the surface figure of the mirror is discussed in detail and get the result that in the circumstance of shooting range, the primary factor which affects the surface figure of the mirror in the infrared sub - system is temperature changing, this ca n be resolved by using material of low expansion coefficient and using same material in the mirror and the mirror seat

    本文將對紅外系統的目標輻射特徵分析和波段選擇進行簡要回顧，討論紅外系統中雜散輻射的抑制，並詳盡分析經緯儀紅外光學系統設計中所涉及到的反射鏡的材料、支撐、結構和優化設計等問題，認真討論和分析影響主鏡的面形精度的各種可能因素。並指出：在靶場環境下影響經緯儀紅外分系統主鏡面形精度的主要原因是溫度的變化，這種情況可通過選擇低線膨脹系數的材料並且使鏡座和反射鏡採用相同的材料予以解決。
  9. At present, people usually use birefrigence and quasi - phase - matching methods to achieve higher effiency in the process of conversion. a significant advantage of quasi - phase - matching method is that the interaction is occurred through the largest element of the x ( 2 ) tensor ; the period of optical superlattice can be designed randomly, and any interaction can be matched without walk - off angle ; they are fitted to be used in frequency conversion of lower power especially. the quasi - phase - matching method has some advantages over birefrigence method, improving the efficiency of frequency conversion ; the range of frequency conversion covers its whole transperant wavelength

    由於準相位匹配技術有其獨特的優勢，可以利用非線性光學晶體的最大二階極化張量，如ppln 、 pplt 、 ppktp用的非線性極化張量都是d _ （ 33 ） ，其有效非線性系數高出普通非線性光學介質（如bbo 、 lbo 、 ktp ）一個數量級，而且可以人為靈活設計調制周期，通過周期設計其頻率變換范圍可以覆蓋準相位匹配介質的整個透明波段，選擇無走離效應，解決了常規pm難以解決的問題，拓寬了非線性晶體的應用范圍，極大地提高了頻率轉換效率，已成為非線性光學材料和固體激光器的研究熱點之一。
  10. It includes four criterions of locating fault point ? “ transient zero sequence current amplitude law ”, “ stable base wave zero sequence current phase law ”, “ stable seventh harmonic zero sequence current phase law ” and “ s injection law ”. pointing out how the law locate the fault point to minimal fault section by applying these criterions gradually. the law will not only make up the blemishes existing in current methods for single - phase fault location in small current grounding system, but also locate the fault point to minimal fault isolating unit on fault line

    該方法通過將所包含的四個定位判據- 「暫態零序電流幅值法」 、 「穩態基波零序電流方向法」 、 「穩態7次諧波零序電流方向法」和「 s信號注入法」 -進行有選擇地遞進使用，不僅有效彌補了目前已有小電流接地系統單相接地故障選線的缺陷，更將故障定位在故障線路最小故障區段。
  11. Band setting tuning condenser

    波段選擇用調諧電容器
  12. There are two kinds of dimensionality reduction methods, band selection and feature extraction

    降維方法主要有波段選擇和特徵提取兩大類方法。
  13. Wavelength band selection algorithm based on background radiance subtraction and its application to target detection

    減背景的波段選擇演算法及其在目標探測中的應用
  14. The research of response wave band for conventional projectiles detecting and tracking by using infrared focal plane sensor

    應用於彈丸跟蹤測量的紅外器件工作波段選擇
  15. Principal component analysis ( pca ), segmented pincipal components transform ( spct ), band selection based on genetic algorithm ( ga ) and high order component are introduced here, which are all effective in for dimensionality reduction

    本文介紹了主分量分析、分段主成分變換、基於遺傳演算法和高階矩的波段選擇四種降維方法。
  16. At a more advanced stage, polarimetric basis, implement system, scheme designs, production method and wavelength selection are considered, being useful to the study of polarimetric technology detecting atmosphere

    進一步討論了開展偏振探測技術研究所應考慮的有關偏振類型、實現體制、方案設計、產品演算法和波段選擇中的問題，對偏振探測技術研究具有參考價值。
  17. The main tasks and innovative points of this study as follow : 1. based on the spectrum anlysis, statistical characteristic and snr ( signal to noise ratio ) of hyperspectral remote sensing image, some optimal bands for desertification monitoring was selected

    本研究的主要工作和創新點包括以下幾個方面： 1從光譜特性、圖象的統計特徵和信噪比三個方面討論了高光譜遙感數據波段選擇的方法。
  18. For the bands selection of hyper spectral image, an algorithm called selected projection pursuit is established and a quick calculating method is developed, the calculating speed is increased 80 ( the bands number of hyperspectral image ) limes. the nonlinear principal curves is researched, it is the nonlinear expansion of pca

    針對高光譜圖像光譜波段的最優波段選擇問題，構造了選元投影尋蹤演算法，並為此建立了一種快速選元投影尋蹤演算法，使演算法的速度提高將近80倍（波段總數的倍數） 。
  19. In the light of field features in desertification areas, the data quality and band combination of different bands are assessed, the indicators, principles and methods for data assessment and band option are put forward to, and optional band combination for desertification monitoring is determined primarily. the data pre - treatment model for desertification monitoring is developed after studying the pre - treatment algorithm of restoration and rebuilding of hyperspectral resolution data. the spectral features and variation rules of different objects in experimental areas are understood and analyzed

    針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行定性和定量的評價，提出用於數據評價、波段選擇的指標、原則和方法；初步確定一個適用於荒漠化監測的優化波段組合，建立適合於荒漠化監測的數據預處理模式；初步分析、掌握研究區內各類地物的光譜特性及變異規律；針對荒漠化地區特點對多種分類方法進行探討分析；建立荒漠化監測主要評價因子的定量反演模型。
  20. This paper is described wavelet transform theory, mother wavelet choice, the method to filter signal by wavelet transform and the result, prospered a way to extract feature originated from wavelet theory, which using wavelet packet analyzing method to subdivide signal both in low frequency and high frequency field, and consider energy of every layer as feature in frequency field, and in conjunction with the detailed analyzing character of wavelet packet in time - frequency plane, consider several minimum or maximum points in the lowest frequency band a s features in the time field

    本文介紹了小波變換的理論、基小波的選擇和利用小波變換進行信號濾波的方法和濾波處理結果，並提出了一種基於小波理論的新的特徵值提取方法。即利用小波包分析方法將信號在低頻、高頻段作進一步的細分，以各層分解的能量作為信號的頻域特徵值，以最低頻帶的極值點作為時域特徵值，這樣的特徵值選取方法較全面的反映了信號的時-頻特徵，優于傳統的傅里葉分析方法。
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