fraction method 中文意思是什麼

fraction method 解釋
分數法
  • fraction : n. 1. 小部分，碎片，片斷。2. 一些，一點兒。3. 【化學】分餾，分層，分級。4. 【宗教】聖餐麵包分切式。5. 【數學】分數。
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  1. Application of continued fraction approximation method to slope probabilistic analysis

    函數連分式漸近法在斜坡穩定性概率評價中的應用
  2. Then based on the method of dimidiate pixel model, the current model is improved, and the model of deriving vegetation fraction from normalized difference vegetation index ( ndvi )

    然後在像元二分模型的基礎上對已有模型進行改進，建立用ndvi歸一化植被指數估算植被覆蓋度的模型。
  3. In the first trial, combination of enzymatic digestion was used to prepare suspensions of spermatogenic cells from adult mouse testis, and then a modified discontinuous percoll gradient centrifugation method ( 15 %, 22 %, 30 %, 40 %, 50 %, 60 % ) was introduced to isolate spermatids from the cellular suspensions. the content of spermatids in each isolated fraction by percoll method was determined by morphology ( wright - giemsa stain ) and flow cytometry analysis, and the viability of spermatogenic cells was assessed by using eosin y exclusion test

    在第一部分試驗中，首先利用連續3次組合酶消化成年小鼠睪丸制備睪丸細胞懸液，然後經6層非連續percoll梯度離心法（ 15 、 22 、 30 、 40 、 50和60 ）分離，通過形態學和流式細胞術鑒定南京醫科大學碩士學位論文各個percoll組分中精子細胞的含量，並以伊紅y排斥試驗測定細胞的存活率。
  4. Standard test method for determining volume fraction by systematic manual point count

    用系統的人工逐點計數法測定體積因數的標準試驗方法
  5. The result showed that non - enzymatic browning of greengage juice could be inhibited and natural primrose yellow could be kept in the plasming of greengage by adding 0. 2 % ( mass fraction ) sodium erythorbate ; non - enzymatic browning of greengage juice was restrained more remarkably by vacuum concentration than by normal pressure concentration ; the non - enzymatic browning of greengage juice increased and the color darkened with the increase of concentration and processing temperature ; non - enzymatic browning of greengage juice in the storage could be inhibited under the condition of low temperature, and frozen storage was the best store method of greengage concentrated juice

    摘要結果表明：在青梅果打漿時加入質量分數為0 . 2 %的異抗壞血酸鈉，可防止果汁氧化褐變而保持天然淡黃色澤；減壓濃縮較常壓濃縮明顯抑制了非酶褐變的發生；隨著果汁含量和加工溫度的提高，非酶褐變加快，色澤加深；低溫有利於青梅濃縮汁的貯藏，冷凍貯藏是最佳的貯藏條件。
  6. Sodium hydroxide for chemical fiber use - determination of sulphate mass fraction - turbidimetric method

    化纖用氫氧化鈉中硫酸鹽含量的測定比濁法
  7. By analyzing the microstructure, the digitized cell model of three - dimensional four - directional composites is established, then the mechanic properties of three - dimensional four - directional composites are calculated by the digitized cell - based finite element method ( dcb - fem ), and the influence of the braiding angle and the fiber volume fraction is discussed

    摘要在確立三維四向編織復合材料數字化單胞力學分析模型的基礎上，運用均勻化方法對三維編織復合材料的等效彈性性能進行了分析計算，並討論了編織角和纖維體積含量對此材料等效彈性性能的影響。
  8. It is studied that the formation mechanism of taylor bubble and its control method in gas - liquid two - phase flow, which affects the pressure balance and mechanical driving efficiency in the flow of petroleum engineering. experiments show that the formation of taylor bubble in gas - liquid two - phase flow is due to the intensive congregation and amalgamation of small bubbles driven by void fraction waves and that the highly turbulent flow is able to restrain this formation. thus, the flow regime transition may be checked by increasing the flow turbulence and controlling the disturbed frequency

    對大管徑氣-液兩相流動中嚴重影響壓力平衡與機械驅動效率的段塞流生成機制和控制方法進行了研究，實驗證明段塞流的形成是由於空隙率波的大幅度增長使氣泡高度集中，並形成聚並所致。強湍流運動可以抑制taylor泡的形成。因此，通過強化湍流或控制擾動頻率可以對氣泡聚並起明顯的抑制作用。
  9. In the thesis, the fundamental formula of ffd method derives from the square root that is approximated by a continued fraction expansion in the one - way wave equation. optimizations of the parameters of the finite - difference operator improve the validity of the method

    本論文用連分式近似單程波波動方程中的平方根導出ffd演算法的基本公式，並對ffd演算法中的有限差分運算元進行了系數優化，進一步提高了計算的有效性。
  10. Air quality - determination of the pm10 fraction of suspended particulate matter - reference method and field test procedure to demonstrate reference equivalence of measurement methods

    空氣質量.懸浮顆粒pm10系數測定.驗證測量方法基準等效值證用參照法和野外檢驗法
  11. Air quality - determination of the pm10 fraction of suspended particulate matter - reference method and field test procedure to demonstrate reference equivalence of measurement methods ; german version en 12341 : 1998

    空氣質量.懸浮顆粒物中pm10系數的測定.驗證測量方法
  12. Air quality. determination of the pm10 fraction of suspended particulate matter. reference method and field test procedure to demonstrate reference equivalence of measurement methods

    空氣質量.懸浮顆粒物的pm10分數的測定.驗證測量方法參考等效值的參考方法和現場試驗過程
  13. Mean, stddev, heterogeneity coefficient and fraction dimension are the indices for evaluating the scaling method in object - oriented image analysis. the change trend of these indices corresponding to segmentation scales is used to judge the validity. in this thesis, object - oriented image analysis is introduced fully

    6 .提出可以用影像對象的均值、標準差、異質性系數與分形維數作為評價面向對象尺度轉換的指標，根據這四個指標隨尺度的變化趨勢分析尺度轉換方法的合理性。
  14. At first, bubble flow image is acquired using laser and incandescence lamp respectively as light source and using ccd. according to different optics - dispersion character, threshold segmentation method is proposed to identify gas from the gas - water flow, which make steadfast base for further calculate void fraction. the precision of threshold directly affect the calculate precision of void fraction

    文中分別採用激光片光源和影視燈照明，採用逐行掃描數字ccd攝像機獲取氣泡的流動圖像；根據氣泡和水對光的反射特性不同，提出採用閾值法識別圖像中的氣泡和水，從而為進一步計算摻氣濃度打下堅實的基礎。
  15. Micrographic method for determining area fraction of the alpha - phases using charts in ferritic - austenitic stainless steels

    鐵素體奧氏體型雙相不銹鋼中-相面積含量金相測定法
  16. Soils : investigation and testing. practical method for identifying the 0 50 mm fraction of a granular material. determination of particle size and blue value

    土壤.調查與試驗.鑒定粒狀材料的0 50mm粒度極的實用方法
  17. Method for hydrocarbon types analysis of gas - oil saturates fraction by mass spectrometry

    重餾份石油飽和烴族組成質譜分析方法
  18. Profilometry based on the improved nonlinear excess fraction method

    基於改進的非線性小數重合法的輪廓測量
  19. Major difference of hn proteins lies in no. 18 - no. 75 amino acid residues on n - terminal which includes three active sites of hn protein. the influence on biological action, caused by the difference of hn protein, is needed to study further. hn gene has only four glycosylation sites, which is 1 or 2 less on amount than that of other strains. so, this difference can be take on as a natural mark of ndv b95 strain furthermore, the fragment encoding hn gene was excised from the positive clone pgem - hn with sail and saci enzyme, and purified by agrose gel fraction method. then the fragment was subcloned into the pet - 28c expressing vector digested by sail and saci restriction enzyme

    作者將正確的重組克隆質粒pgem - hn用saii 、 saci雙酶切，電泳回收目的片段，將其亞克隆到經saii 、 saci雙酶切處理的pet - 28c中，轉化大腸桿菌tgi感受態細胞，得到的轉化子經pcr鑒定和酶切分析，篩選出符合閱讀框的重組子，構建成重組表達質粒pet - hn ，並在大腸桿菌bl _ （ 21 ） （ de _ 3 ）宿主菌中成功地表達了含目的蛋白的融合蛋白，融合蛋白的分子量約66kd ，加入iptg誘導8h后，蛋白表達幾乎達到最高水平。
  20. A surface antigen hemagglutinin - neuraminidase ( hn ) gene of the ndv b95 strain, was selected to study as target gene. referred to the reported sequence, rwo primers were designed and synthesized. hn gene of ndv b95 strain was amplified by rt - pcr, the pcr products were checked by agrose gel electrophoresis and purified by agrose gel fraction method

    為此，從澳大利亞某大學獸醫病理系引進一株ndv熱穩定性天然弱毒b95株，並選取其表面抗原血凝素?神經氨酸酶的編碼基因為目的基因，根據國外已發表的序列，設計一對引物，利用rt - pcr技術擴增出了ndvb95株hn基因。
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