low background 中文意思是什麼

low background 解釋
低背景值
  • low : adj 1 低的；淺的，矮的。 low flight 低飛。 a low temperature 低溫。 low tide [water] 低潮。 The g...
  • 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...
  1. At the background of more aboil competition, more low industry profit and more short distribution channel, the existence & development situation of mobile phone dealers especially the cdma mobile phone dealers becomes more noticeable

    在目前競爭日益激烈、行業利潤越來越低、渠道扁平化趨勢發展的市場狀況下，手機經銷商尤其是剛進入市場不久的c網手機經銷商的生存和發展情況如何就更加引人關注了。
  2. Initial growths of disturbances are measured by means of hot - wire anemometry. due to the detected signals with low signal to noise ratio, the coherence function is used to eliminate background noise during data reduction

    在擾動增長的初始階段，信號的信噪比非常地低，根據相關譜分析方法，應用相干函數，將擾動信號有效地提取出來，測量了初始擾動的增長。
  3. On this basic, it come out rs485, bitbus application casus to distribution watch system. this system make up real time watch system and data manage net system by bitbus communication to complete detract check and focus show function of high low electric power parameter. it take on task of background communication and proscenium data manage

    該方案應用bitbus現場總線構成一個完整的實時監控和數據管理網路系統，完成高、低壓配電室電力參數的分散檢測和集中顯示等功能，上位機同時承擔后臺通訊和前臺數據管理任務，前後臺并行工作，該方案在某汽車製造廠配電系統中得到了較好的應用。
  4. Based on analysis of geologic foundation record about pingzhuang basin, a lot of sino - foreign geothermal geology record and investigation of field geology, measuring of ground temperature in person and geo - chemical analysis of ascension spring, gushing water of fault, the fact that the anomaly of geothermal gradient of pingzhuang basin, which is in region of low geothermal gradient, is caused by redistribution of conduction - oriented geothermal heat flow which is result from upheaval and depression of basin foundation bed is pointed out. after the field of ground temperature is simulated under the background of conduction - oriented geothermal heat flow by means of ansys, the characteristic of ground temperature distribution of top surface of basin foundation bed ( yixian team ) is revealed. the sound condition of transmissibility fault and feeding water source, which are imperative in formation of the low - medium temperature geothermal system of convective type, is possessed in pingzhuang basin

    通過對平莊盆地基礎地質資料、國內外大量地熱地質資料的分析和野外地質調查、礦井實測地溫以及上升泉、斷層涌水的地球化學分析等工作基礎上，指出地處低地溫梯度背景區的平莊盆地地溫梯度異常是由於盆地基底隆起和坳陷引起傳導型大地熱流再分配所致；運用州sys數值模擬了大地熱流向地表傳導背景下的盆地地溫場，從而揭示了盆地基底（義縣組）頂界面地溫分佈特徵；闡明了盆地具有形成中低溫對流型地熱系統所必需的導水斷裂、補給水源等的良好條件，中低溫對流型地熱系統是地熱勘查的主要對象；圈定了平莊盆地北部朝陽溝?駱駝營子地熱勘查遠景區。
  5. Background : in - vitro maturation ( ivm ) of human oocytes would be an attractive alternative to gonadotrophin stimulation for in - vitro fertilization ( ivf ). it could avoid the complications of gonadotrophin stimulation and reduce the cost of drugs. however, the efficiency of existing ivm technique is suboptimal because embryos resulting from ivm oocytes exhibit frequent cleavage blocks and low implantation rate

    研究背景：近20年來，輔助生育技術有了突飛猛進的發展，體外受精、卵漿內單精子注射技術（ intracytoplasmicsperminjection ， icsl ）和種植前遺傳學診斷技術的成熟標志著人類生殖醫學進入了嶄新的領域，但同時也不能否認，在這一領域中還存在諸如妊娠率低、藥物副作用和多胎率高等問題。
  6. Research and analysis were carried out on yangshan super - large gold deposit in terms of regional background for tectonic evolution and development and geological and geochemical characteristics for metallogenesis, and the results indicate that it is a hydrothermal ( medium to low temperature type ) super - large gold deposit formed in mesozoic to cenozoic activated orogens or at hypabyssal positions in the crust

    摘要從陽山超大型金礦床的區域構造演化發展背景、成礦地質地球化學等特徵進行的研究與分析表明，它是形成、產出在中新生代活化造山帶、地殼高位淺成的中低溫熱液型超大型金礦床。
  7. Furthermore the expressions of all the genes in a representative sample were examed by the recently developed method of hybridization to cdna arrays. this was intended to strengthen the theoretical background for the screening of norway spruce genotypes with low lignin content. the calli of the transformed sublines a78 - 3, a78 - 4, a78 - 5 and the untransformed control a95 : 88 : 22 were successfully induced to form mature embryos from which plantlets were established

    以轉基因亞系a78 - 3 、 a78 - 4 、 a78 - 5和未轉基因對照a95 : 88 : 22的細胞愈傷組織為實驗材料，以dkm和lp - m熟化培養基培養五周后，再以1 4sh萌發培養基培養四周，成功地誘導形成了胚胎，並再生成新的小植株，萌發成活率達到80 。
  8. Clearing a surround to the orchard, will significantly reduce background pollination to very low levels.

    在種子園周圍只要清除出一條隔離帶，便可顯著地使外來傳粉減到最低水平。
  9. Properties and applications of bh1216 two - sample low - background and scintillation counter

    測量儀性能研究及其應用
  10. Teachers viewed bullies as hot - tempered, doing poorly at school work, physically strong, always anxious, popular and thought they come from a family background which is characterized by a lot of physical punishment, inconsistent discipline, distant relationships and physical or emotional abuse ; they thought of victims as having learning difficulties, having few friends, having low self - esteem, lacking social skills, unassertive or passive, having physical disability, physically weak and being over - protected by parents. 5. teachers recommended more positive strategies to victims

    4 、中小學教師認為，與受欺負者相比，欺負者以下特徵更為明顯：脾氣暴躁、學業不良、身體強壯、經常焦慮、受歡迎、在家庭中經受了大量的身體懲罰和身體或情感虐待、父母管教不一致、家庭關系疏遠；與欺負者相比，受欺負者在下述特徵上表現更為突出：有學習困難、沒有朋友、低自尊、缺乏社會技能、不自信或被動、有身體缺陷、身體弱小、父母過度保護。
  11. It is an unfathomed and difficult problem that weak and small targets are detected in complicated background and low snr

    摘要復雜背景下低信噪比弱小目標的自動檢測是當今目標自動探測研究尚未解決的一個難題。
  12. The planet vibrates at a very low frequency ? too low for our ears to pick up, but enough that geologists get an annoying background noise on their sensitive instruments

    行星振動的頻率很低，我們耳朵很難分辨出，但在地理學家靈敏的儀器上卻會收到一個非常令人討厭的背景噪音。
  13. 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。
  14. The subject is reviewed on the value of low chilling peach and nectarine varieties, breeding history, breeding characters, genetic background, breeding objective and introduction of the advanced varieties as well as the breeding objective in china

    從短低溫桃、油桃品種的價值、育種歷史、特點、遺傳背景、主要育種目標和優良品種介紹等方面概述了短低溫桃品種的研究進展，提出了我國短低溫桃育種的目標。
  15. Low background pulse counting assembly

    低本底脈沖計數裝置
  16. Verification regulation of low background alpha and or beta measuring instrument

    低本底測量儀檢定規程
  17. Detection of radioactivity in water with low background measuring system

    對一臺立體定向伽瑪射線體部治療裝置的放射防護監測與評價
  18. 1. boron - doped diamond ( bdd ) electrodes have recently attracted considerable interest, especially for electrochemical analysis due to its outstanding characteristics : ( 1 ) very low background current density ; ( 2 ) a wide potential window in aqueous solution ; ( 3 ) good activity toward some redox analytes without any pretreatment ; ( 4 ) long term response stability

    1 .硼摻雜金剛石（ bdd ）電極具有較低的背景電流、無需作任何處理的情況下對一些氧化還原分析物有好的活性、高電化學穩定性、寬的電位窗口和長時間的響應穩定性等優點，研究了一些活性物質在bdd電極上的電化學性質。
  19. 7. the labeled sample was purified and hybridized with the self - made cdna microarray, which demonstrated low background and clear positive signals

    7 、標記的樣品純化后與晶元雜交，獲得的雜交結果背景低，陽性信號的界限清楚。
  20. 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。
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