nb-a 中文意思是什麼

nb-a 解釋

  • nb : Nb ＝【化學】 niobium 鈮。
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  1. The diffusion welding behavior of single - crystalline cu to single - crystalline - aio with a nb film interlayer and the joint microstructure properties were studied by tem, sem / eds analyses and four - point bend testing. the nb film interlayer deposited by electron beam evaporation on the ceramic side prior to diffusion welding was found to be olycrytalline and fiber - textured after diffusion bonding, with the close - packed plane ( 110 ) being parallel to the ( 0001 ) basal plane of - aio

    擴散連接技術是一門邊緣科學，涉及材料、擴散、相變、界面反應、接頭應力應變等各種行為，工藝參數多，雖然已經進行了大量的試驗研究，但卻對各種材料的連接機理尚未有明確的認識，為此人們試圖藉助于計算技術，對接頭行為進行數值模擬，以便找到共同規律，對擴散連接過程及質量進行預測與實時控制。
  2. The pegmatite nb - ta mineral veins were controlled by a group of horizontal tenso - shear axial - direction fault - fissure systems in the nne direction folding structures

    鈮鉭偉晶巖礦脈受控于nne向褶皺構造的一組近水平張扭性軸向裂隙系。
  3. Superconductivity - ac loss measurements - total ac loss measurement of cu nb - ti composite superconducting wires exposed to a transverse alternating magnetic field by a pickup coil method

    超導性.交流電損耗測量.用拾波線圈法測量暴露于橫向交流磁場的cu nb - ti合成超導導線的交流電總損耗量
  4. Superconductivity - part 8 : ac loss measurements ; total ac loss measurement of cu nb - ti composite superconducting wires exposed to a transverse alternating magnetic field by a pickup coil method

    超導性.第8部分:交流電損耗測量.用拾波線圈法測量爆露于橫向交流磁場中合成超導導線的交流電總損耗量
  5. Superconductivity - part 8 : ac loss measurements - total ac loss measurement of cu nb to composite superconducting wires exposed to a transverse alternating magnetic field by a pickup coil method

    超導性.第8部分:交流電損耗測量.用拾波線圈法測量暴露于橫向交流磁場的銅鈮復合超導導線的交流電總損耗量
  6. The southern hainan mafic dykes are strongly enriched in lile with high nb / ta ratios, indicating a magma source reconstructed by silicic - melt through partial melting of ancient subducted slides. however, the northern hainan mafic dykes with chondritic nb / ta ratio should be derived from the fiuid - metasomatized mantle related to ancient subduction zone

    瓊南基性巖脈強烈富k _ 2o等lile和具有較高nb ta比值，其地幔源區應受到了古俯沖板片部分熔融形成的硅質熔體的改造；而瓊中基性巖脈的nb ta比值接近於球粒隕石和morb值，應為古俯沖帶含水流體交代的地幔源區的產物。
  7. Strong negative 8 eu shows the granites are high evolved granite. ( 6 ) the tetrad effect of ree and the obvious fractionation between k - rb, y - ho, zr - hf, nb - ta, and sr - eu in the dajishan granites indicate that, the aqueous fluid pays an important role in the evolution of the granites, as well as indicate that there exist enough interaction between peraluminous melt and aqueous magmatic fluid. furthermore the fluorine played a very important role in this process

    （ 6 ）大吉山花崗巖類稀士元素具有「四重效應」配分的特點以及微量元素對kjrb 、 y / ho 、 zr艦f以及nb / ta發生明顯分異，暗示在花崗巖巖漿的演化過程中，經歷了充分的流體一熔體作用，同時分異出大量富含f 、 w等礦化劑元素和成礦元素的熱液流體，致使鎢礦的形成。
  8. Any government that & nb sp ; is blind to this point will pay a hea vy price

    任何政府忽視這一點都將付出巨大的代價。
  9. They are experiment b in which a a bogused vortex with tilted vertical structure is planted and the terrain of zhoushan archipelago exists, experiment bt in which a a bogused vortex with right vertical structure is planted and the terrain of zhoushan archipelago exists, experiment nb in which a a bogused vortex with tilted vertical structure isn " t planted and the terrain of zhoushan archipelago exists, experiment bnz in which a a bogused vortex with tilted vertical structure is planted and the terrain of zhoushan archipelago is removed, experiment blz in which a a bogused vortex with tilted vertical structure is planted and the heights of terrain of zhoushan archipelago are doubled, experiment bmz in which a a bogused vortex with tilted vertical structure is planted and main islands of zhoushan archipelago are set as a part of mainland

    本文應用三重嵌套網格區域的非靜力mm5模式模擬了其生命後期，沿30 n一帶西行登陸的過程，並就熱帶氣旋的bogusing問題、熱帶氣旋登陸過程中的結構演變和舟山群島地形對熱帶氣旋的影響進行了探討，並通過一系列的敏感試驗來確定小型島嶼地形的作用。本文採用了六個試驗方案： （ 1 ）試驗b ，有舟山群島的地形，且加入傾斜垂直結構人造熱帶氣旋的試驗方案。 （ 2 ）試驗bt ，有舟山群島的地形，且加入正壓垂直結構人造熱帶氣旋的試驗方案。
  10. Increasing the cooling velocity and additions of nb and zr can refine the a - fe dendrites in as - cast alloys, decrease the amount of a - fe phase after homogenization treatment. as a result, the magnetic. properties were improved

    提高鑄錠的凝固速度及添加nb和zr可以促進鑄態合金內- fe相的晶粒細化及均勻分佈，減少均勻后殘留的- fe相，提高均勻化的效率和質量，從而提高磁體的矯頑力。
  11. Haoxi nb - ta mineral deposits in guangning county of guangdong province occurs in the c - formation of sinian system strata and the folding structures and faulted structures is a very development in the area

    摘要廣東廣寧厚溪鈮鉭礦床賦存於震旦系c組地層中，區內褶皺構造、斷裂構造十分發育。
  12. This important tectonic zone parallel to the isotopic geochemical steep zone, which represented a suture line between the yangtze and cathaysian blocks. the geochemical evidence of the jianshui volcanic rocks from the sw part of shizong - mile zone shows that their lithologic types are tholeiites with the comparative flat ree patterns and enrichment in th, depletion slightly in nb, ta, and flat hfse. thus, they may be formed in a back - arc basin with the characteristics between morb and island - a

    該構造帶西南段的建水火山巖地球化學特徵研究表明，該火山巖為拉斑玄武巖，具有較平坦的稀土分配型式， th較富集， nb 、 ta輕微虧損，高場強元素分佈較平坦，具有介於島弧和morb之間的地球化學特徵，可能形成於弧后盆地環境。
  13. Alloy fabricated by arc melting consists of continuous nbssi matrix and dispersive distributed nb particles. the metastable nbasi phase is found to have a tetragonal crystal structure with space group p42 / n and lattice parameters a = 1. 021nm, c = 0. 519nm

    O 0 ）金屬間化合物的顯微組織由連續的nb3si基體、彌散分佈的nb粒子組成，其中亞穩態相nb3si為四方結構，空間群p42 n ，點陣常數a l
  14. On october 19, 1998, one of the defendants, a 42 - year - old man recruited as a money courier of the syndicate, was intercepted by nb officers when he attempted to smuggle can $ 380, 000 to hong kong upon his arrival at the hong kong

    一九九八年十月十九日，其中一名四十二歲男被告企圖將三十八萬加幣的販毒得益從溫哥華帶返香港清洗，當抵達香港國際機場時被香港毒品調查科人員截查。
  15. Comprehensive utilization tests and studies on a large - size nb - ta deposit

    某大型鈮鉭礦綜合利用試驗研究
  16. In this paper, a bogused vortex with tilted vertical structure is firstly taken into account. check results of experiment b, experiment bt and experiment nb, we find that the simulated tc track, center pressure and pattern of precipitation during landing in experiment b are better than others. so, a bogused vortex with asymmetrical horizontal structure and tilted vertical structure is good for a tc moving in mid - latitude, which may be a new way to initialize this kind of tc in numerical simulation

    本文首次採用傾斜垂直結構的人造熱帶氣旋作為初始渦旋，試驗b和試驗bt以及試驗nb的模擬結果對比發現，前者對9806號熱帶氣旋登陸前後的運動路徑、中心氣壓、降水分佈和初始結構的模擬能力優於後兩者，因此，具有傾斜垂直結構的人造熱帶氣旋比正壓結構的人造熱帶氣旋更適合於作為模擬中緯度運動的熱帶氣旋的初始渦旋，從而提出解決該類熱帶氣旋初始化問題的一種新思路。
  17. After extensive investigations, officers of narcotics bureau ( nb ) identified two key members of a psychotropic drugs trafficking syndicate

    毒品調查科經過廣泛調查后，成功鎖定一個精神科藥物販毒集團的兩名主要成員。
  18. The cracks extend along the matrix / strengthening - phases interfaces and form the cleavage steps and tear ridges. there appear some very small dimples on the fracture surfaces of the directionally solidified samples, which come from the nb - based solid solution particles in the big plates of the strengthening phases, but no dimples on the fracture surfaces of the as - cast sample. it can be concluded from above results that niobium - niobium silicide based in - situ composites ( rmics ) with a uniformly orientated microstructure can be produced by the ebfzm with high temperature gradient, and their mechanical properties can be increased

    隨著抽拉速率的提高和硅化鈮強化相間距與尺度的減小，材料的室溫拉伸強度和斷裂韌性均有提高， _ b最高可達778 . 4mpa ， k _ （ ic ）達到了46 . 3mpa ? m ~ （ 1 / 2 ） ；試樣的拉伸斷口基本表現為脆性解理斷裂的花樣，裂紋沿基體強化相界面繞過強化相進行擴展，在裂紋擴展方向存在解理臺階，並形成撕裂棱。
  19. Duplex microstructure transformation of a cast high - nb containing tial alloy

    合金雙態組織轉變過程
  20. The results indicate that arc melting is a good method to produce nb - si system intermetallics due to its simpler technics, lower cost and compact products. however, powder metallurgy is found to be not suitable to produce the nb - si system intermetallics due to its coarse and loose products resulting from the poor molding property of nb and si mixed powders. optical floating zone technology, which is used to fabricate nb - si intermetallic composites for the first time, is also found to be a good way to produce nb - si system intermetallics because of its compact products and good property despite of its relatively high cost

    結果表明，電弧熔煉方法制備得到的nb - si系金屬間化合物比較緻密，且制備工藝簡單，經濟實用，是一種合適的nb - si系金屬間化合物制備方法；由於nb 、 si元素粉末的成型性很差，用粉末冶金方法（熱壓燒結和冷等靜壓）制備的nb - si系金屬間化合物表面粗糙、緻密度低，且成本較高，不宜用於制備nb - si系金屬間化合物；首次用光學懸浮單晶生長技術制備的nb - si系金屬間化合物復合材料緻密度很高，盡管成本稍高，但由於性能最佳，也是一種合適的nb - si系金屬間化合物制備方法。
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