fd-a 中文意思是什麼

fd-a 解釋

  • fd : 場解吸
  • 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. E. coli xl1 - blue cells were tansformed by psurfpga and phages were rescued by m13ko7 helper phage particles. results showed that the heterodimeric enzyme was expressed as a fusion protein that matures to an active biocatalyst connected to the coat protein of phage fd

    以構建的噬菌粒psurfpga轉化具有琥珀突變的大腸桿菌xl1 - blue ，以輔助噬菌體m13k07超感染，進行青霉素g酰化酶基因的表達和在噬菌體表面的展示。
  2. A total of 1161 pieces of the iucd, of model copper t380a and batch number fd 010201, had been used by dh s family health services and fpahk between 2001 and 2003

    受影響的子宮環型號屬coppert380a及批號fd010201 ， ?生署轄下的家庭健康服務部與家計會於2001至2003年，共使用了1161件。
  3. Under the support of federal aghcuiturai research center ( fal ) of germany, a series of experimeflts had been done to compare swr sensor with tdr sensor made by germany and fd sensor made by holland. the results showed that the performance of the swr sensor is as good as other sensors. ln addition, the result further showed that the swr sensor have excellent results in every kinds of soil texture

    在德國聯邦農科院的技術與生物系統研究所（ fal ）的資助下，做了swr型與tdr型、 fd型土壤水分傳感器的性能對比研究，結果進一步表明swr型土壤水分傳感器的測量結果不僅受土質的影響不明顯，而且說明swr型土壤水分傳感器的性能與國外同類傳感器相當。
  4. This paper unfolds engineering disposition and theoretical research of negative temperature high performance concrete ( nthpc ) with the damage of many factors motivation, the project background based on qing - zang railway engineering, which is one of four - emphasized engineering during the tenth five - plan. due to the difference of environment of construction and service between nthpc and ordinary concrete, and therefore durability of nthpc is required to higher level. at a first, nthpc must avoid frozen damage at early age and possess anti - freezing property at later period, in order to meet engineering practicable application need, and this are two emphasized and difficult problems, as for nthpc ; by means of mechanism analysis about deicing - agent ingredient and anti - freezing at early period, adopting composite technique routine of mineral addition + anti - freezing element + water - reducer4 - air - entraining + anti - erosion of steel component etc, based on orthogonal experimental approach, fd - 1 composite functional admixtu re was manufactured, which has more property and orientation on qing - zang railway

    負溫混凝土由於和普通混凝土在施工環境及服役環境上存在的差異，因此表現為比普通混凝土更為較高的耐久性要求；負溫混凝土首先要避免早期的凍害以及具備長期抗凍性能，才能夠滿足工程實際應用的要求，這也是負溫混凝土必須解決的兩大技術關鍵；通過對目前常用防凍劑組分作用機理的分析研究及混凝土早期防凍機理探討，採用礦物外加劑+防凍組分+高效減水劑+引氣+阻銹組分功能復合的技術路線，通過正交試驗設計復配了適應青藏鐵路工程要求的專用多功能復合型外加劑fd - 1 ；並在此基礎上配製不同等級負溫高性能混凝土，開展一系列包括硫酸鹽侵蝕、氯離子滲透、抗凍融循環、收縮及耐磨性等耐久性能研究；通過對fd - 1組分和摻量的調整，優化負溫混凝土在施工特性、力學指標和耐久性三個方面的兼容、協調性。
  5. After that, we advanced a new optimized fd _ bpm arithmetic. using of this new optimized fd _ bpm arithmetic, we developed numerical simulation program to simulate the waveguide and finish the template by those simulation results. then we analyzed the interdigital transducer ( idt ) and acquired the device parameters

    然後提出了一種改進的有限差分光束傳輸法（ fd _ bpm ）演算法，利用此演算法對器件所需的波導進行了優化模擬計算，根據這些優化值設計製作了光刻模板
  6. On financial derivatives ( fd ) flows, a net inflow of $ 37. 8 billion due to cash settlement of fd was recorded in the third quarter of 2003, compared with a net inflow of $ 22. 0 billion in the second quarter of 2003

    在金融衍生工具流動方面，二零零三年第三季錄得378億元由金融衍生工具現金結算所引致的凈流入，而二零零三年第二季則錄得
  7. The old professor had preside fd over a seminar for ssp heoretical physicis lts

    老教授主持了一次理論物理學家的研討會。
  8. Computational fluid dynamics ( ( fd ) provides a condition for numerically simulating ship fluid flow field with the development and commercialization

    計算流體動力學的發展和商業化，為數值模擬船舶流場提供了條件。
  9. The finite difference beam propagation method ( fd - bpm ) can simulate the performance of the waveguide accurately. single mode rid waveguide structure parameters are derived by variational - effective index method ; fd - bpm and its transparent boundary condition ( tbc ) are concerned, and then the eim used to transfer a 3d waveguide to 2d waveguide is analyzed ; finally we summarize the characteristic of the y branch

    本文先利用變分有效折射率法推導出滿足單模傳輸的脊形波導結構參數;接著介紹了有限差分束傳播法及求解的透明邊界條件，同時分析了將三維結構轉化為二維結構的有效折射率法，最後對y分支的特性進行了模擬。
  10. In this paper, the foundamental principles of fd _ bpm ( finite - difference beam propagation method ) used to simulate and calculate the process of beam propagation is first introduced. then ， the theory of boundary condition is carefully presented. based on those theories mentioned above, a new kind of fd _ bpm arithmetic is brought forward. compared with the traditional arithmetic, this one has much more advantages. in virtue of the new arithmetic, author accomplished the whole simulating designs with two kinds of optical splitter ( stright y - junction optical splitter and sine - type optical splitter ), including propagation field simulating, vital parameter calculating, acquired some optimized waveguide parameters ， and finished the template by those results at last

    本文主要藉助這種改進的fd _ bpm演算法，對兩種結構的光分路器（直y型光分路器，上升正弦型光分路器）進行了器件設計的軟體模擬，包括對兩種結構光分路器傳輸場進行模擬，並對兩種結構光分路器的重要參數，如波導寬度，分叉角，縱橫比，損耗進行了模擬計算；得到了一些有價值的優化波導結構參數值，根據這些優化值設計製作了光刻模板。
  11. Second, the mode fields of a strip waveguide and some slab waveguides have been simulated by applying finite - difference time - domain ( fdtd ) method. the curvature radius ; vicinity coupling ; transition loss and power attenuation of a s - shape bend waveguide have been analysed numerically by employing wide angle finite - difference beam propagation method ( fd - bpm ), as well as the coupling loss of optical fiber and waveguide. in addition, the framework of the s - shape waveguide laser has been

    其次，應用時域有限差分法，結合波導模式理論對條形與平面波導進行了模場模擬;應用廣角有限差分光束傳播法，對s形彎曲波導的曲率半徑、鄰近耦合、過渡損耗、功率衰減以及波導與光纖的各種耦合損耗進行了數值分析，並在此基礎上，對s形波導激光器的結構作了初步設計。
  12. Secondly, the human body is simulated by a model with inhomogeneous dielectric constant and conductivity hi the fdtd program to calculate the effect of stable plane wave to the human body, hi the same time the mode can be used hi ( fd ) 2td programmed to calculate the effect of electromagnetic pulse to the human body by using debye parameter

    主要包括以下幾部分內容：首先，編制fdtd （時域有限差分法）和（ fd ） ~ 2td （色散時域有限差分法）程序，並驗證了這兩個軟體的有效性。其次，建立了解析度分別為4 . 25mm和1 . 31cm的實際人體電磁參數模型和色散電磁模型，建模過程中採用了圖象處理技術。
  13. The curly waveguide was simulated with fd - bpm too. it was important to optimize the waveguide structure and s waveguide laser. a new equipment which could be used in field - assisted ion exchange process was designed and the blueprints of the equipment were drawn

    設計了一種新的用於電場輔助離子交換的實驗裝置，並繪制了裝置設計圖;設計了一套利用該裝置進行電場輔助離子交換，制備掩埋型波導的切實可行的實驗方案。
  14. Because lithium niobate is a kind of anisotropic material, anisotropic fd - bpm is used

    由於鈮酸鋰材料是一種各向異性材料，必須採用各向異性fd - bpm法分析。
  15. But in the paper, there are two directly inputting variables that they are ed and fd, and the ed is calculated by ld and rd, where the ld, rd and fd denote the distance that are measured by range sensors on a car between the left, right, front obstacle and the car, then they will be translated into controlling variable u by the function of fuzzy controller, and then the car will move basing on the controlling variable u

    在常規的模糊控制中採用變量和變量變化以及變化率作為輸入的多維模型。本文採用所檢測到的三個距離即ld 、 rd 、 fd經過簡單變換為ed 、 fd ，再以這兩個變量直接作為輸入，經模糊控制器的作用，輸出控制量u ，小車就按照該控制量的控制來實現運動。
  16. Once we have the new drive in the machine, we d want to create a raid autodetect " fd " partition of the appropriate size on our new disk

    一旦在機器上裝好新的驅動器，我們將希望在其上創建一個大小適當的raid自動檢測（ " fd " ）分區。
  17. This guild consists of 2 guilds in different server : an alliance guild and a horde guild, both achived many fd of cwow

    這個工會分成兩個分會在不同的服務器，一個聯盟工會和一個部落工會。兩個工會完成了很多cwow的首次擊殺。
  18. Once the fd occurs in a company, investors and financial institution will sustain losses. it can even lead to finance crises

    企業的衰落不但給投資者、金融機構帶來了較大的損失，甚至會引發金融危機。
  19. Beginning with the equivalence principal, two types of near - field to far - field ( nfff ) transformation s are discussed systematically, i. e. frequency - domain nfff ( fd - nfff ) and time - domain nfff ( td - nfff ). in td - nfff transformation, the concurrent - processing approach is used, where the contributions to far - field from the tangential electric current and magnetic current on the equivalence surface are calculated " on - the - fly " in step with the fdtd simulation. as a result, it is not necessary to store the tangential current components for every equivalence surface at every time step, and therefore reduce considerably computer storage required for the td - nfff transformation

    在理論部分，本文從電磁場的等效原理出發，系統、詳盡地論述了頻域和時域近遠場變換的基本思想，在時域近遠場變換中採用實時的變換方法，即每進行一個時間步的迭代，就計算一次等效面上該時間步的切向電流和切向磁流對遠場各方向的貢獻，這樣就使時域近遠場變換不需要儲存等效面上每一個時間步的切向電流和切向磁流，大大減小由於近遠場變換而增加的計算機內存需要量。
  20. A good forest structure could improve the even degree and range of distribution obviously, and improve the porosity ; the fractal dimension ( fd ) and mean weight diameter ( mwd ) could sign the soil structure feature objectively

    良好的林分結構能明顯提高土壤粒徑的分佈均勻程度與范圍，改善土壤孔隙狀況；分形維數和重量平均直徑能比較客觀地表徵土壤結構特徵，是較為理想的土壤結構測定指標。
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