derived type 中文意思是什麼
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2 the theoretical values of the second virial coefficient are precisely fitted into some simple expressions. according to one of them, a new temperature function for the quadratic terms in cubic equations was derived : the function is simple, general, without acentric factor, truly predictive, theoretically sound, and applicable to all the van der waals - type equations
2將第二維里系數的理論值較精確地擬合為幾種簡單的表達式，並據此導出了立方型狀態方程中二次項溫度函數的新形式該式簡單、通用，不含偏心因子，具有真正的預測功能和堅實的理論基礎，原則上適用於所有vanderwaals型方程。 -
For this purpos, from the point of the log geology, aimed at the actuality of the current fractured reservoir log geology interpretation and evaluation, based on synthetical analysis of the current domestic and foreign fruit of fractal dimension investigation of reservoir fracture, using the method and technique of fractal dimension, through the further discussion of the fractal dimension characteristics of m index and n index in the log interpretation archie model in a sample way and through the theoretic reasoning to the fractal dimension dfa and m index of fractured reservoir interval ' s log curve, according to the geophysical signification of the fractal dimension dfa of fractured reservoir interval ' s log curve shape : the more complicated the change of the curve shape is, the larger the its dfa value is, then the more complicated space structure of fracture and pore, then the higher value of m index of space structure of fracture and pore, and so on, the text propounds an improved method, based on box dimension, of covering log curve with scale grid, and by programming computes the dfa and its m index value of fractured reservoir interval ' s log curve, for instance, ac and rt curve, ect, then further puts this technique into application investigation, and makes analysis of application effects in the reservoirs located in l area of qx oil field from three aspects : 1. the dfa and its m index value of fractured reservoir interval ' s log curve, for instance, ac and rt curve, ect, which are derived from computing, is used to identify reservoir type by crossplotting m index with the product df _ acrt of fractal dimension of acoustical wave log curve and restivity log curve and by experiential discriminance plate of reservoir type in l area of qx oil field
因此，對該區裂縫性儲集層的類型識別、孔滲特徵的測井地質解釋以及儲層裂縫的發育和分佈規律進行深入的研究便成為本文研究的出發點。為此，本文從測井地質的角度，針對當前裂縫性儲層測井地質解釋與評價的現狀，在綜合分析當前國內外儲層裂縫的分形分維研究成果的基礎上，利用分形分維方法和技術，通過對archie測井解釋模型中的m指數、 n指數的分形分維特性的深入淺出的論述以及裂縫性儲層段測井曲線分維d _ （ fa ）與m指數的理論推導，根據裂縫性儲層測井曲線形態分維值的地球物理意義? ?曲線變化越復雜，則其分維值d _ （ fa ）越大、裂縫孔隙空間結構越復雜、裂縫孔隙空間結構指數m值越高等特徵，提出了改進的基於盒維數的測井曲線網格覆蓋法，編程計算了裂縫性儲層段常規測井曲線（如聲波和電阻率曲線）上分形分維值及其m指數值，進而從以下三個方面對qx油田l區塊的裂縫油藏進行應用研究，效果十分理想： 1將計算得到的可變的m指數與聲波和電阻率分維之積df _ acrt進行交繪，採用儲層分維值分類技術統計分析這些參數變化的規律，並結合qx油田l區塊儲層類型經驗判別圖版，從而實現qx油田l區塊下白堊統的裂縫性儲層的類型識別。 -
Water soluable, it is a type of plant derived pigment from beetroots
水溶性天然植物染料，是由甜菜根中提取的甜菜苷和異甜菜苷構成的物質。 -
Forward displacement analysis for lps + 3tps, lpt + 2tps, lpps + 4tps type pmts are performed based on result elimation method. closed form solutions for forward displacement of these hybrid type pmts are derived, numerical examples are given for illustration
基於結式消元法分別對1ps + 3tps型、 1pt + 2tps型和1pps + 4tps型並聯機床進行了位置正解分析，獲得了封閉形式的解析解。 -
When overridden in a derived class, gets the current item as a boxed object of the most appropriate microsoft. net framework version 2. 0 type according to its schema type
當在派生類中重寫時，根據當前項的架構類型以最合適的microsoft . net framework 2 . 0版類型的裝箱對象的形式獲取當前項。 -
This solution defines the class clist as a class derived from the list structure and it stores a single destructor value to handle a single stored type
本解決方案將clist類定義為從list結構導出的一個類，它通過存儲解除函數的單個值來處理單個存儲類型。 -
On the condition of “ many - head ” and “ small drive ratio ” ， the plane double enveloping hourglass worm can not settle the problem of undercutting and sharpening simultaneously. it has devoted to a new type hourglass worm _ sphere double enveloping hourglass worm. the coordinate system is established according to the frock. the meshing equation and the tooth equation of worm and gear have been developed and the distribution of contact line on gear tooth is analyzed. to evaluate the meshing quality ， four meshing quality indexes and five original parameters are put forward. through mass programming computing ， the relations between meshing quality and original parameters are derived and depicted by graphs
考慮到平面二次包絡環面蝸桿傳動在多頭小傳動比條件下根切與齒頂變尖的矛盾很難同時解決且嚙合性能較差，介紹了一種新型環面蝸桿傳動? ?球面二次包絡環面蝸桿傳動.在研究過程中，根據工裝建立了坐標系，根據一二包過程的運動關系推得了嚙合方程和蝸桿與蝸輪的齒面方程，分析了蝸輪齒面上的接觸線分佈.為了評價嚙合性能，提出了4項性能指標和5項原始參數，通過大量編程計算得到了嚙合性能指標與原始參數之間的關系，並以圖表直觀的表示 -
Construction of recombinant fowlpox virus coexpressing aiv ha and ndv f. for the construction of transfer vector pfgs11haf, aiv ha gene of f strain in puc18ha and ndv f gene of f48e8 strain in puc19f were removed and inserted into pfgs11. recombinant fowlpox viruses ( rfpv ) coexpressing aiv ha gene and ndv f gene were constructed by using different promoters of ps and pe / l. recombinant rfpvs were derived by dosper liposome - mediated transfection with the two transfer vectors on chicken embryo fibroblast ( cef ) monolayer cultures which were infected by wild type fpv chinese vaccine strain 282e4 3 - 4 hours earlier
Puc18ha和sk質粒同時經hind 、 kpn酶切后連接得中間質粒skha ；將質粒skha用bamhi酶切回收ha基因插入到插入載體pfgs11中的bamhi位點，通過酶切鑒定獲得了pfgs11ha ；將含ndvf基因的質粒puc19f用hind 、 sal酶切經klenow酶補平插入到經sma酶切后的skifn中pe / l啟動子下獲得中間質粒skf ，再將質粒skf和puc18質粒先分別用ecor 、 xho酶切klenow補平，后再共同用sac酶切連接得puc18pelf ， sal酶切回收pe / l - f基因盒插入到pfgs11ha的sal位點，通過酶切鑒定獲得了pe / l - f與ps - ha同向的表達載體pfgs11haf 。 -
It is derived the hamiltonian for the interaction of a - type three - level atom with a two - mode quantum cavity field from the general interaction hamiltonian between a multi - level atom and a multi - mode radiation field, and reduce it into an effective two - mode raman - coupled mode under large detuning condition. it is proposed a modified effective hamiltonian for the two - mode raman - coupled model. it is found the time - dependent state vectors and present validity conditions for the involved interaction hamiltonians. it is shown that in the study of the two - mode raman - coupled model it is not enough to retain only the usually used effective hamiltonian, one must also take into account the ac stark shift of the atomic levels ( at least one of the levels ). finally, it is studied the atomic dynamics in the interaction of a - type three - level atom with a two - mode quantum cavity field and in the two - mode raman - coupled model. it is found that the number of collapse - revivals, the collapse time and the revival time show new characteristics
從多能級原子與多模光場的相互作用哈密頓量出發，導出了型三能級原子與雙模光場的相互作用哈密頓量.在大失諧條件下將其化成等效的二能級形式雙模喇曼耦合模型.提出了該模型的一個改進型等效哈密頓量.該哈密頓量由兩部分構成：一部為通常所謂的等效哈密頓量，另一部分描述原子能級的動態斯塔克移動.研究表明，在雙模喇曼耦合模型的研究中，只考慮前者是不夠的，還必須考慮後者.最後，我們研究了該系統中原子的動力學行為，發現崩塌-復甦的數目、崩塌時間和復甦時間均呈現新的特性 -
The main content of this thesis includes the following parts : ( 1 ) in chapter 2, the conditions of link lengths are derived for the side bars to rotate as cranks. two types of cranks are defined and then five - bar linkages are divided into four types, i. e. the full double - crank linkage, the double quasi - crank linkage and the double rocker linkage, and the crank - rocker linkage. the rotational ranges of the two side links for each type of the mechanism are analyzed, and the corresponding numerical algorithm is developed
本文主要做了以下幾方面的工作： （ 1 ）在第二章中，先導出五桿機構兩連架桿可整周轉動的桿長條件，並根據曲柄的存在情況，對五桿機構進行分類，即把五桿機構分成全曲柄機構、雙準曲柄機構、雙搖桿機構和準曲柄-搖桿機構四種類型。 -
For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics
利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0 -
A derived data type is a derivative or structure of existing base types or other derived types
派生數據類型是已有的基本類型或其他派生類型的一個派生物或結構。 -
Property will return the name of the derived type that extends the
類的派生類型的名稱。 -
Date, and a base type to a derived type
，以及從基類型轉換至派生類型。 -
A derived type can override an inherited virtual method
派生類型可以重寫繼承的虛方法。 -
The virtual method cannot be overridden in a derived type
虛方法不能在派生類型中被重寫。 -
And a derived type to its base type
以及從派生類型返回至其基類型。 -
Any object - derived type can be assigned to this property
任何對象派生類型都可指派給此屬性。 -
This error occurs if you have code that attempts to convert two types that cannot be implicitly converted, such as in an assignment of a base type to a derived type that is missing an explicit cast
如果您的代碼試圖轉換兩種不能隱式轉換的類型（例如將基類分配給一個缺少顯式強制轉換的派生類） ，將發生此錯誤。 -
The derived type that introduces mixed content should be specified as follows
應按如下所示指定引入混合內容的派生類型：
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