background spectrum 中文意思是什麼

background spectrum 解釋
本底譜圖
  • background : n 1 後景，背景；基本情況；（紡織品等的）底子；出身；經歷。2 隱蔽的[不引人注目的]地位；幕後。3 襯...
  • spectrum : n. （pl. -tra ）1. 【物理學】譜，光譜；波譜；能譜，質譜。2. 【無線電】射頻頻譜；無線電（信號）頻譜。3. 【心理學】（眼睛的）余像；殘像。4. 〈轉義〉范圍，幅度；（連續的）系列。
  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 concept of irradiance signal - to - noise ratio ( snr ) on the target plane and the minimum of the irradiance that can be detected by the detector was taken as the beginning, combined with a thorough analysis of the spectrum radiating feature of the target and the sky background, the atmosphere conditions, spectral filtering and the influence that the various components in the system have on the target irradiance on the detector ' s target plane and the background irradiance snr, the equation of the flying bomb ' s effect range affected by the point of burst measuring system is made, and all related factors that have an impact on the effect range are analyzed as well

    從探測器靶面上輻照度信噪比的概念、探測器的可探測輻照度最小值出發，在詳細分析目標、天空背景的光譜輻射特性、大氣條件、光譜濾波技術以及系統各環節對探測器靶面上目標與背景輻照度信噪比的影響的基礎上，推導了炸點測量系統對爆炸的飛行彈體的作用距離方程，分析了影響作用距離的諸因素。
  3. The nonlinear filtering for nbi estimate - subtract assumes that the prediction error is dominated by spread spectrum signal and the background noise power is far below spread spectrum chip power, this assumption promises the low error ratio of chip decision but may not be attainable to digitalized dsss receiver in military communication environment, and does not coincide with the principle of dsss communication that decreases bit error ratio ( ber ) depending on spread spectrum gain, not on chip power

    在干擾估計抵消濾波中，以往的非線性濾波要求干擾抵消濾波后擴頻信號功率遠大於殘余噪聲功率，進而假設碼片判決的誤碼片率基本為零，這一要求對軍用擴頻通信是不利的，而且也不符合擴頻通信利用擴頻增益降低誤碼率的原則。
  4. Firstly it discusses the value, meaning, background and method of this topic. then it deducts the single - bubble sound pressure, spectrum of sound pressure, power spectrum. according to the real situation of traveling bubble cavitation noise around a schiebe body, the mathematical model of single - bubble collapse is selected, furthermore, the mathematical model of mass traveling bubbles without interference effect is established, and the multi - peaks and rebound phenomenon while bubbles collapse is also analyzed with statistical method

    首先論證了本項研究的意義，價值，背景和方法，然後推出了單空泡輻射噪聲聲壓，聲壓譜和功率譜，針對回轉體流動泡空化噪聲的具體情況，選擇了雙指數模型作為單空泡潰滅的數學模型，進一步建立了無干涉條件下的群泡輻射噪聲的數學模型，並用統計的方法分析了空泡潰滅時的多峰值和反彈現象。
  5. Background gradient spectrum

    背景陡度光譜
  6. Background mass spectrum

    本底質譜圖
  7. This paper researches the integrating application of adaptive antenna array technology, spread - spectrum communication technology and transform - domain filter technology in shortwave communication area, basing on the background of improving on the shortwave communication equipments being used in chinese army, and all the key techniques mentioned above are implemented in a single fpga chip

    本文以改造我軍現役短波通信設備為背景，研究了自適應天線陣技術、擴頻通信技術、變換域濾波技術等多種現代數字信號處理技術在短波通信中的綜合應用，並以單片超大規模fpga晶元為硬體處理平臺，對系統中的關鍵技術進行了設計與實現。
  8. In conjunction with the release of masters latest illustrated book of wisdom tales, god takes care of everything, initiates adapted the spectrum of colors used in the text for the background of their exhibition booth, whose soft, warm, lively style attracted numerous visitors of all ages

    為了配合師父新書上帝照顧一切這本智慧漫畫集的推出，我們攤位的背景設計特別採用書中彩頁的色調，整體風格顯得相當柔和溫馨又不失活潑，因此吸引了許多大小朋友的注意，不少學前的幼兒主動拉著父母親來到我們攤位參觀。
  9. It is a branch subject of the national natural science fund project called the model and emulating about the property of spectrum radiative in sky background. the whole project can be divided into 3 parts : the radiative transfer in atmosphere, the radiative transfer in cloud and the radiative transfer on surface

    它是國家自然科學基金- -天空背景光譜輻射特性建模與模擬的一個分支課題，全課題可以分為三個部分研究:大氣中的輻射傳輸，雲層在地對空觀測中的影響以及下墊面在地對空觀測中的影響。
  10. Based on the research of the former scholars, with the background of nonlinear analysis and investigation on structural seismic damage, with the knowledge of capacity spectrum method, the thesis concludes a new method of aseismic analysis method considering damage to the structure during two earthquakes through the push - over method and quasi - static test in the program of idarc ( inelastic damage analysis of reinforced concrete )

    本文的研究內容屬于工程結構抗震領域研究范疇。在前人研究的基礎上，根據鋼筋混凝土非線性分析和結構地震損傷評估的基本知識，應用能力譜方法，利用idarc軟體中的push - over方法和擬靜力循環往復加載分析方法提出了一種考慮兩次地震作用下的建築物震害預測方法。
  11. Because of the affection of noise and signal fading, in order to high data rate access and high quality, wireless communication need new technology to improve the link reliability and enhance the spectrum efficiency. mimo ( multiple input and multiple output ) can enhance the spectrum efficiency and increase channel capacity greatly, and reduce the multipath affection without spectrum band and power increasing. the 3th generation mobile communication wcdma is coming, with the purpose of putting mimo, stbc ( space time block coding ), space diversity into practice of wcdma systems, in order to lay the foundation of 3g toward 4g, this dissertation has done some research under this background

    在發射機和接收機使用多個天線進行數據傳輸的多輸入多輸出（ mimo ）技術，可以在不增加帶寬和天線發送功率的條件下，成倍的提高頻譜利用率，提高系統的通道容量，還可以抗多徑干擾。第三代移動通信wcdma即將到來，為了將多天線技術（ mimo ） ，空間分集技術，空時編碼技術用到wcdma系統中去，為第三代移動通信向第四代移動通信系統平穩過渡奠定一定的基礎，需要做一些理論上的研究。
  12. Most of the lectures on nbi suppression assume that the spread spectrum signal and the background noise are white. this assumption cannot stand up in digitalized receiver because of the if oversampling and digital low pass filtering in digitalized receiver. the code - aided optimal filtering is studied extensively in the circumstance of oversampling and colored background noise

    以往的擴頻抗干擾文獻多將擴頻信號和背景熱噪聲假設為白噪聲，由於在數字正交解擴解調中採用過采樣和數字低通濾波，這一假設在數字化擴頻接收機中並不成立。
  13. In hf ( high frequency ) radar, the targets detected based on the spectrum processed by the two - dimension fft are peak - like, which makes the operator distinguish them from the clutter and background noise easiler in the 3d ( three - dimension ) display than the 2d

    特別對于距離分辨力低的高頻雷達系統，其探測的目標通常近似為點目標，在經二維傅立葉變換得到的頻譜數據上呈現峰狀結構。
  14. By establishing the fuzzy set of the energy spectrum, the standard isotope library and the algorithm of fuzzy recognition, a quick automatic qualitative analysis was achieved, and the spectra of three mixed standard radiation sources and three samples of low background were analyzed

    通過建立關于未知譜的模糊集合、標準核素庫及模糊識別演算法，實現了能譜的決速自動定性分析，並對3組混合標準源能譜和3個低本底樣品能譜進行了定性分析。
  15. Nuclear instrumentation - spectrometry - characterization of the spectrum background in hpge nuclear gamma - ray spectrometry

    核儀器裝置.光譜測定法. hpge核射線光譜測定法中光譜底色的特性
  16. In the press conference, erica shared her views in the additional benefit of jd training to her career, the jd programme equips me with the professional knowledge that enhances my competitiveness in the dynamic business world. vincent reassured legal training synergizes with his business background brought him valuable new skillsets and insights, although traditionally law and mba are two distinct and separate fields, my newly acquired legal skills complement the full spectrum of business knowledge and management skills provided in the executive mba program

    已擁有豐富商業實戰經驗的梁偉業，認為法律的專業訓練帶給他在商業基礎以外一些相當重要的啟發及得著：雖然在傳統上法律及商業是兩個截然不同的范疇，但是我從法律博士課程所學到的專業知識及思維訓練，正好配合我從行政人員工商管理碩士課程所學到的商業管理知識及技巧，讓我在工作上思考得更全面，發揮得更好。
  17. Nuclear instrumentation - spectrometry - characterization of the spectrum background in hpge gamma - ray spectrometry iec 61976 : 2000

    核儀器裝置.光譜測定法. hpge射線光譜測定法中光譜
  18. The application of wavelet transform in the spectrum signal processing is studied. the influence of the transform on the gauss spectrum peak is analyzed. a method is proposed to reduce the noise and background in the spectrum signal obtained by the micro spectrometer

    研究了採用小波變換來消除光譜信號中的噪聲和背景信號的方法，並深入研究了小波變換處理對真實光譜信號的影響，提出了採用小波變換消除光譜高頻噪聲和低頻背景信號的方法。
分享友人
分享到 Line

分享到臉書