nbi 中文意思是什麼

nbi 解釋
國家調查局
  1. To research in the area of liquid helium cryopump used in nbi system is meaningful for obtaining better beam transportation efficiency. physical parameters and experience are obtained that are very useful in developing cryopumps

    開展中性束注入系統液氦低溫冷凝泵的研究，對獲得優良的束傳輸效率，具有非常重大的意義；並為以後相關應用領域中低溫冷凝泵的設計提供了性能參數和工程經驗。
  2. To research in the area of liquid helium cryopump used in nbi system is meaningful for obtaining better beam transportation efficiency. physical parameters and experience were obtained which is very useful in developing even larger cryopump

    開展中性束注入系統液氦低溫冷凝泵的相關研究，對獲得優良的束傳輸效率，具有積極的意義；並為以後開發更大抽速的低溫泵及相關應用積累了豐富的物理參數和經驗。
  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. Conclusions : the sensitivity of the studied first - generation nbi system for the detection of patients with neoplasia seems to be comparable to conventional colonoscopy, although more suspicious lesions were found during nbi

    結論：檢測患者腫瘤形成的第一代窄帶成像技術的診斷敏感性與常規結腸鏡具有可比性，即使該技術發現較多腫瘤可疑區。
  5. Nbi clearance ( all applicants 16 years of age and above ) and nbi letter of explanation for any notation of no criminal record, no pending criminal case, or with derogatory record

    國家調查局（ nbi ）證明（適用於所有16歲或以上的申請人）及nbi關于無犯罪紀錄、無待定罪案，或名譽損毀紀錄等記號的說明函
  6. Finally, we utilized the system to make an experiment in puffing gas of nbi system and analyzed the relation between pressure variation of tank and gas quantity

    最後利用該充氣系統進行了nbi系統充氣實驗，定量分析了tank內壓力變化與進氣量的關系。
  7. Liquid helium cryocondensation pump has great advantages in large pumping speed, working pressure range and high ultimate pressure, etc. it ' s more excellent than any other vacuum pump. it can meet the vacuum requirement of nbi and can improve the transportation efficiency. the development of neutral beam injection ( nbi ) system in the world, the structure of nbi system used on the ht - 7 device of asipp was introduced in the thesis

    液氦低溫冷凝泵是利用低溫面對氣體有強吸附能力的原理，實現抽氣的真空獲得設備，它具有抽速大、工作壓強范圍寬、極限真空度高等一系列優點，是普通真空設備無法比擬的，作為中性束注入系統的主抽泵，它能滿足中性束注入系統對大抽速的要求，提高中性束的傳輸效率。
  8. It can meet the requirements of nbi for vacuum

    它能滿足中性束注入系統對真空的要求。
  9. The output sinr limitations of mmse and constrained mmoe optimal filter are derived in the cirsumstance aforementioned. these limitations constitute the base of the code - aided optimal filtering and nbi estimate - subtract filtering. this dissertation summarize the recursive least squares ( rls ) algorithm, blind recursive least squares algorithm and the qr decomposing for these two algorithms

    為自適應實現碼輔助最優濾波，本文系統總結了遞歸最小二乘（ rls ）和盲遞歸最小二乘（ brls ）演算法，以及兩者基於正交三角分解（ qrd ）的并行計算結構。
  10. The article analyzes mainly the relation between pressure distribution of neutralizer and efficiency of neutralize describing neutralized rate of high - energy ion beam in the process of passing neutralizer. then, we accurately analyze pressure distribution in the axis direction of axis of nbi system, especially of pressure distribution curve of neutralizer

    主要分析了高能離子束通過中性化室的中性化效率與中性化室內壓強的關系，給出了nbi系統從離子源引出端到托卡馬克裝置入口處的軸線上壓強分佈情況，尤其是中性化室內的壓強分佈曲線。
  11. Neutral beam injection ( nbi ) heating is one of the main auxiliary heating methods in controllable nuclear fusion experiment

    中性束注入加熱是可控核聚變主要的輔助加熱方式之一。
  12. The article primary introduces composing of ht - 7 neutral beam injection ( nbi ) system, then mainly analyzes gas target thickness, that is pressure distribution of neutralizer gas cell, one of factors which affect heating efficiency of nbi

    本文首先介紹了ht - 7中性束注入（ nbi ）加熱系統的組成，然後對影響中性束注入加熱效率因素之一的氣體靶厚度即中性化室的壓力分佈進行了重點分析。
  13. The beam loss on the beam line is analyzed after the introducing of principle and structure of nbi system. the beam absorption targets are designed for measuring the lost beam power, and as an emphases, the calorimeter is designed in detail to measure the beam power and the distribution of beam power density

    本文在介紹了中性束注入系統原理和結構基礎上，對束線上束流損失進行了分析，設計了束流吸收靶測量損失的束功率，同時重點設計了功率測量靶以測量束功率和功率密度分佈。
  14. According to the ideology of software radio theory, the realization of intermediate frequency ( if ) digitalized direct sequence spread spectrum ( dsss ) receiver is one of the focuses in dsss communications study. it is of great value to deploy narrowband interference ( nbi ) suppression techniques in if digitalized dsss receiver for commercial and military applications

    根據中頻數字化這一軟體無線電思想實現擴頻接收機是目前擴頻通信研究的熱點，在中頻數字化擴頻接收機體系結構內研究窄帶干擾抑制技術具有重要的商業和軍事應用價值。
  15. The theoretical analysis of large cryocondensation pump for nbi was mainly concerned. this paper emphasized on analyzing and calculating the heat load of cryocondensation pump, simulating thermal transmission coefficient and molecule transmission coefficient of radiation baffle according to monte carlo method, analyzing the process on cryo - surface and the factor of affecting pumping speed and hydrogen layer thickness of influencing cryo - parameter, etc. finally by verifying the pumping speed on large cryocondensation pump for neutral beam injection system, the pumping speed of 4. 0x105l / s ( for h2 ) was proven to be reasonable

    本文首先介紹了中性束注入系統的國內外發展狀況，闡述了中科院等離子體所ht - 7中性束注入系統的構成，主要對用於中性束注入系統的大型低溫冷凝泵的特性進行了理論分析；對冷凝抽氣面的熱負載進行了分析計算；用蒙特卡羅法對輻射擋板的分子傳輸幾率與熱傳輸幾率進行了模擬計算；研究了低溫表面的處理方法對抽速的影響以及氫層厚度對各低溫參數的影響；最後對用於中性束注入系統的大型低溫冷凝泵的抽速進行了驗證，得出的結論是：選取40萬升秒的抽速是合理的。
  16. 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。
  17. Stabilizing vacuum of nbi system quickly is the key issue that many countries are concerning and researching actively

    快速穩定中性束注入系統動態真空度是目前各國仍在積極探索的重要課題。
  18. The fundament of nbi system used on the ht - 7 device of asipp and its requirement for vacuum is introduced in the thesis

    本文介紹了中國科學院等離子體物理研究所ht - 7中性束注入系統的工作原理和它對真空系統的要求。
  19. The aim of this study was to compare the accuracy of narrow - band imaging ( nbi ), a new imaging technique, with standard colonoscopy for the detection of neoplasia in patients with longstanding ulcerative colitis

    窄帶成像（ nbi ）為檢測的新技術，本研究目的是比較該技術與常規結腸鏡對長期潰瘍性結腸炎患者檢出腫瘤的準確性。
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