比度放射性 的英文怎麼說

中文拼音 [bǐdùfàngshèxìng]
比度放射性 英文
specificradioactivity
  • 比 : Ⅰ動詞1 （比較; 較量高下、 長短、距離、好壞等） compare; compete; contrast; match; emulate 2 （比...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 放 : releaseset freelet go
  • 射 : Ⅰ動詞1 （用推力或彈力送出） shoot; fire 2 （液體受到壓力迅速擠出） discharge in a jet 3 （放出） ...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 放射性 : [物理學] radioactivity; activity; emissivity
  • 放射 : radiate; emit; blas; radiation; emission; shooting; shedding; abjection; emanation; effluence
  1. Standard methods of analyzing low specific gamma radioactivity samples by semiconductor gamma spectrometers

    用半導體譜儀分析低比活度放射性樣品的標準方法
  2. In order to save the cost of the home robot, the robot with single camera as its outer sensor has become a popular research field during the past few years. we need a method to describe the environment so that the single camera can be used effectively. in this paper a novel algorithm named scale invariant feature transformation ( sift ) is used to extract the key points of the environment

    為了利用單目視覺傳感器，需要一種相應的外界環境的描述方法，本文採用一種比例縮放不變的特徵點（ sift特徵點）來描述環境， sift特徵點具有比例縮放不變性，旋轉不變性和部分仿射不變性等優良性能，從而具有高度的可辨別性。
  3. By analyzing and comparing the network feature index - non - beeline coefficient. shortcut index. joint degree index, demonstrates the cobweb theory that in the conditions which has the same area. scale and density, round - radiation network has the best traffic efficiency

    基於對路網特性指標? ?非直線性系數、快捷性指數、連接度指數分析比較的基礎上，提出並論證了在同等的路網覆蓋面積、規模和密度的條件下，環形放射式路網具有最優的交通效率的蛛網理論。
  4. Moreover, it has been pointed out that the hydrogen engine used in ? cylinder injection with high pressure can increase volumetric efficiency and compression ratio, - therefore, the performance indexes in this engine, such as output power, thermal efficiency, range of thickness of mixture with normal operation and nox emission, can be improved, and it is possible for the engine to realize rapid combustion of thin mixture, so abnormal combustion, such as backfire, pre ? ignition, can be controlled effectively

    指出了採用內部混合氣形成方式且高壓噴射的氫發動機，有利於提高充氣效率和壓縮比，從而改善發動機的動力性和經濟性；有利於擴展發動機正常工作的濃度范圍；並且有利於實現稀薄混合氣快速燃燒，從而可以有效地抑制早燃、回火及爆燃等異常燃燒和no _ x排放量。試驗指出了發動機的點火正時、噴射正時及噴氫量對發動機的性能、異常燃燒、 no _ x排放量有很大影響。
  5. The application of liquefied petroleum gas ( lpg ) in engine has been popularized and applied in recent years, but one distinctive disadvantage existing in both of them when applying the first or second lpg supplying system is that the driving performance drops to some degree. toimprove the driving performance and reduce the exhaust emission is the purpose of the author and liquid lpg injection, whis is based on the third lpg electronic control injection, is studied

    近年來液化石油氣（ lpg ）用作發動機燃料已經得到了一定的推廣和應用，但是採用第一、二代lpg燃料供給技術有一個明顯的缺點就是動力性都有不同程度的下降。本文以恢復發動機動力性和降低排放為目標，在綜合對比分析三代lpg燃料供給技術的優缺點后，在第三代lpg燃料供給技術的基礎上進行了lpg液態噴射研究。
  6. According to negative temperature coefficient of vbe and positive temperature coefficient of vt, a framework of band - gap voltage reference is investigated. the reference offer a source of pir, distributed three voltage, one as upper - threshold voltage of dual - threshold comparator, the other as lower - threshold voltage of comparator, the other as direct current voltage for second band - pass filter amplifier

    同時利用pnp晶體管發射結電壓的負溫度特性和發射結差值電壓的正溫度特性設計了一個帶隙基準電壓源。此帶隙基準電壓源本身作為熱釋電紅外傳感器的電源電壓，同時分壓提供雙限電壓比較器的上限電平和下限電平以及第二級帶通濾波放大器的直流電平。
  7. Exact dates for sites can be calculated and the method is more accurate than radiometric dating techniques

    用這種方法測量出的精確度要比放射性技術的高。
  8. In order to verify the natural radioactivity level, of tin polymetallic ore in southeast yunnan, and find out radioactive pollution in mining, dressing and smelting processes, 10 tin ores in this area were chosen to measure radionuclides ' specific activity in each kind of tin polymetallic ore, undressed ore, ore concentrate, debris and smelting slag

    摘要為查明滇東南錫多金屬礦天然放射性水平，了解錫礦采、選、冶過程中的放射性污染，選擇了該區10個錫礦山，測量了各類錫多金屬礦原礦、精礦、尾礦及冶煉爐渣放射性核素比活度。
  9. Scientists already know the ages of the mare flows at the apollo sites from analyzing the radioisotopes in the rock samples, so they can estimate the ages of other flows by comparing their crater densities with those of the landing - site flows

    科學家分析巖石樣本中的放射性同位素，已經知道阿波羅登陸點的月海巖流年齡；因此將其他巖流的隕石坑密度與登陸點巖流的隕石坑密度相比，科學家便能估計其他巖流的年代。
  10. If the coating is of a great enough thickness, according to gove, it would make the fabric sample seem younger than it should be to the radiocarbon method

    依照哈里所說： 「如果覆蓋物有足夠的厚度，那麼放射性碳測定法會得出比預期年代要晚的結果。 」
  11. The morphology examination by sem and tem showed that the carbon nanotubes were arranged in the array uniformly and paralleled, with smooth walls, the outside diameter of 120 nm and the inside diameter of 110 nm. from the cyclic voltammetry, the array electrodes in an acidic electrolytic solution had greater capacitance than the case in a neutral electrolytic solution. the specific capacitance of 365 f / g was achieved with the discharge current density of 210 ma / g in the solution of 1 mol / l h2so4

    掃描電子顯微鏡和透射電子顯微鏡對碳納米管陣列電極的形貌表徵表明碳納米管形狀規整，排列有序，尺寸均勻，管壁光滑，外徑約為120nm ，內徑約為110nm ；循環伏安實驗表明mwnts陣列電極在酸性溶液中比在中性溶液中具有更好的電容性能；根據恆電流充放電法得出mwnts陣列電極在1mol / lh _ 2so _ 4水溶液中，在210ma / g的放電電流密度下的比電容可達353f / g ，比目前報道的無序碳納米管和活性炭電極的比容量都高得多；其它電化學實驗顯示該電極具有很低的內阻和良好的充放電循環穩定性。
  12. Radiation protection instrumentation - equipment for measuring specific activity of gamma - emitting radionuclides in foodstuffs

    輻射防護儀器儀表.食品中輻射放射性核素的放射性比度測量設備
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