曲率變化點 的英文怎麼說

中文拼音 [biànhuàdiǎn]
曲率變化點 英文
point of inflection
  • : 曲名詞1 (一種韻文形式) qu a type of verse for singing which emerged in the southern song and ji...
  • : 率名詞(比值) rate; ratio; proportion
  • : Ⅰ名詞1 (液體的小滴) drop (of liquid) 2 (細小的痕跡) spot; dot; speck 3 (漢字的筆畫「、」)...
  1. 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。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線分維d _ ( fa )與m指數的理論推導,根據裂縫性儲層測井線形態分維值的地球物理意義? ?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線網格覆蓋法,編程計算了裂縫性儲層段常規測井線(如聲波和電阻線)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將計算得到的可的m指數與聲波和電阻分維之積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。
  2. The lower part of pv curve contains abundant information about uep bifurcating as power changes

    常用電力系統p - v線的下半部分包含有不穩定平衡隨功p的豐富信息。
  3. Using the thermodynamic conditions describing the coexistence of two phases and the stability conditions of equilibrium state, we have calculated the normalized temperature and the normalized pressure of the triple point ( t1, p1 ), the melting curve, vapouring curve and the sublimation curve. the whole phase diagram of the 2d monatomic l - j system is obtained

    和杜宜瑾等人的方法類似,我們先給出了系統在相時的一些參數的數值,在此基礎上,考慮占據q的因素,利用相平衡的熱力學條件及平衡態的穩定性條件,得到了二維單元l - j系統的熔線、汽線、升華線以及三相的位置,從而給出了該系統的完整的三相圖。
  4. First from system aspect, this paper uses voltage sensitivity, pv curves method, equivalent reactive compensation method, back - up generation method to evaluate the reactive value of the generators in seven buses system and ieee 14 buses system. the vs and pv methods can evaluate the source ' s ability of tracking the load ' s variation. the erc and back - up methods can evaluate the availability of replacing other generators. the value determines the cost

    從對系統貢獻角度,採用電壓靈敏度方法( vs法) 、 pv線法、等效無功補償法( erc ) 、無功備用方法來確定一個七節系統中的發電機的無功價值和ieee14節系統的發電機的無功價值,電壓靈敏度法和pv線法可比較出不同電源跟蹤負荷的靈敏度大小,而等效無功補償法和無功備用方法可比較出不同電源替換其它發電機是否是最有效的。
  5. It was showed that c. arborescens ecotype wu was generally the most drought tolerant one except lower than c. arborescens ecotype xj which was the maximum in may, bore comparison with zygophyllum xanthoxylum by estimating seasonally ; c. latens ecotype nx was significantlly lower than c. arborescens ecotype wu, the result was contrary to being known ; c. arborescens ecotype kerqin was significantlly lower than wu ; xj, the maximum in may, showed no else great difference to nx ; c. lanata was high in april and not high afterwards, however its phenological phase presented visible changes as compared with the original life patterns in western america

    Arborescensecotypexj ) 5月耐旱性表現最強,其他時間與寧夏駝絨藜差別不大;北美駝絨藜( c lanata ) 4月拐很高, 4月以後耐旱性降低,其物候期與原分佈區(美國西部)相比發生了很大。駝絨藜屬植物在不同季節中蒸騰速的日基本上都為典型的單峰線。
  6. Based on the experiment results, the damage form of abnormal exterior joint are summarized, characteristics of hysteresis curve are studied, the effect of stirrup ratio and height of column section and beam section on anti - shear property of abnormal joint are discussed, working mechanism of abnormal exterior joint is researched, the conclusion that the anti - crack and bearing capacity of abnormal joint are studied by analyzing the minor core of abnormal exterior joint is proposed, the basic data is provided for the design formula of abnormal joints

    根據試驗結果,總結了異型邊節的破壞形態,研究了節滯回線的特徵,討論了節核芯配箍、樑柱截面高度對異型邊節抗剪性能的影響,分析了異型邊節的受力機理,提出應以「小核芯」為分析單元來研究此類節抗裂和承載力的建議,為異型節設計公式的建立提供了基礎數據。
  7. First, we identify the homonymous points using normalized product correlation to revise the geometry distortion. in this method, the linear combination of correlation ' s three features is considered to improve the matching probability of homonymous points

    本文首先選取同名以校正幾何形,採用歸一積相關函數為選取準則,並以相關面的三個特徵量的線性組合來評價選取的同名,提高匹配
  8. He finds the pitch range after calculated the three important parameters through the bladed for windows software, then presents an optimized control strategy that regulate the pitch angle in terms of the wind speed. it must control the output power because the variational output power brings the variational loads. he confirms and optimizes the control strategy that the output power is the control target, the output power is divided into three parts

    將功作為系統控制的目標,將功分成三段進行控制,在低風速區,載荷是有限的,以功最大作為控制目標;在額定風速附近,由於處在升力線斜,功較大,應盡快調整槳距角進入失速區工作,減少載荷的波動,該額定風速區的上下工作要通過現場試驗的手段來確定;在額定風速以上,使功維持在額定輸出,減少功波動,並通過bladed軟體的模擬計算對控制策略進行了驗證。
  9. Because the data mutate on the position that is the edge, the normal curvature on some orientation changes from positive to negative. so it is thought whether some point is judged the edge - point by this character

    由於邊緣是圖像上像素發生突的位置,所以在圖像面上某一方向的法值會出現由正到負的,故此應用這個性質來判斷面上某是否為邊緣
  10. By successful solution of non - linear magnetic fields and revision of the program, we can reach following conclusions : in the computation of nonlinear magnetic fields, if iteration method is used, under - relaxation is necessary when amending the permeability distribution in soft magnetic materials ; and when < wp = 5 > calculating the equivalent current density in permanent magnets, under - relaxation is not a necessity ; when searching for permeability values by interpolation method on the demagnetization curve of soft magnetic materials, if a fixed saturation point is set, around this point an abrupt change of permeability values will be obtained ; this sudden change may cause a little problem in the smoothness of magnetic field distribution ; because the magnetic circuits of microwave tubes are too complicated, in the author ' s view, to describe the working state of a magnet system, the working points of magnets can not do it properly but average energy production of magnets will serve ; as to indicate the quality of a magnet system design for microwave tubes, the efficiency of magnetic energy utilization will be a very good criterion

    由此得出結論,在非線性磁場計算中:採用迭代法的情況下,在各迭代循環之間進行磁導修正時,一個欠鬆弛迭代過程是必需的;對永磁體中的等效電流修正時可以不作欠鬆弛迭代;在純鐵的磁線上指定某一個固定的磁感應強度為磁飽和值,會使得插值求出的磁導在該磁飽和值附近有一突,這一突對計算結果中磁場分佈的光滑性稍有影響。在微波管磁系統設計中,由於微波管磁路比較復雜,作者認為磁體的工作並不能很好地反映磁體的工作狀態,而採用平均磁能積為衡量磁體工作狀態的標準更加符合微波管磁系統的實際情況;要表示磁系統設計好壞的程度,則用磁能利用的效為標準更好。
  11. The following algorithms have been proposed and tested in the thesis : 1 frequency selective fading : combine the isomorphism between the input space and the output space and propose a new approach to blind equalization of the channel. compared with conventional methods, the new approach offers lower computational complexity, better performance, and more robust against the over - determination of the system order ; 2 time selective fading : a new approach to the equalization of time selective channel based on the zero - forced equalizer is proposed which is more simple in its structure of algorithm ; 3 time - varying channel : using the instantaneous mean value changes of the output signal to extract the information of channel variations and model it using ar model, kalman filter is then employed to track channel variations, it bears faster ability in tracking the variation of tv channels ; based on the isomorphism between the inputs and the outputs and some of the approaches using in mimo system, a new algorithm of equalization of simo time - varying channel is proposed, which also share the merits of being robust against the over - determination of the system order ; model the time - varying channel using the multi - resolution decomposition wavelets, and then a blind identification method based " on the model is proposed ; at last, a new model for equalization and identification of mimo system is proposed

    主要工作在以下幾個方面: 1 、針對頻選擇性衰落通道:結合輸入輸出空間同構關系提出一種新的頻選擇性通道均衡方法,與傳統方法相比,該方法計算量更小,收斂速度更快,性能更優,且對系統階次的過確定表現穩健,具有實際均衡應用價值; 2 、針對時間選擇性衰落通道:提出一種基於迫零均衡的時間選擇性通道均衡方法,演算法結構簡單; 3 、針對時色散通道:利用瞬態均值線提取通道時信息,對之ar建模,利用卡爾曼濾波器跟蹤時通道抽頭,可以快速跟蹤通道;基於輸入輸出空間之間的同構關系以及多輸入多輸出系統的處理方法,提出了新的單輸入多輸出色散時通道均衡與識別演算法,同樣具有對通道階次過確定保持穩健的優;結合小波多解析度分析提出一種基於小波模型的通道盲識別演算法;研究時的多輸入多輸出系統的盲均衡與盲反卷積問題,給出一種時系統處理模型。
  12. The problem is researched and the algorithm which calculates the intersection points of two graphs created by the same coefficient of the ifs is proposed. the curve described changing of the intersection points number is drawn. the conc lusion is that the curve fluctuates in the tiny range and is smooth when it is seen as a whole

    其次,針對同一ifs迭代碼兩次迭代繪制得到的分形圖並非完全相同這一問題展開研究,提出了ifs分形覆蓋相交交線的概念,給出了覆蓋相交交線的繪制演算法,在此基礎上進一步研究了分形覆蓋相交交線的情況,得到了分形覆蓋相交交線宏觀上比較光滑,但實際上小范圍內異常波動的實驗結果。
  13. The mode refractive index of 632. 8nm wavelength, which propagates in ion - exchanged planar waveguides, is obtained by m line technology ; the serious problems of silver film ion - exchange also be pointed out. the refractive index profile of planar waveguide is obtained with inverse wentzel - kramer - brillouin method by measured mode refractive index. finally, some improvements of silver film ion - exchange is put forward

    最後介紹了銀膜電場輔助法制備光波導的試驗過程,對實驗獲得的參數進行了分析和計算,得到了波導的模折射和折射的函數線,隨后對在試驗過程中遇到的一些問題和現象進行了闡述,分析了其產生的原因,並提出了自己的觀和改進的辦法。
  14. On the basis of the research by former people, the work of this paper includes several aspects as follow : throughout a great deal of experiment of the mechanics performance of 2d weave c / sic composite materials laminated plate, we simulated the nonlinear relationship between a and e in the tensile course ; and we inspected the original damages and the damages evolvement ; and we made the statistic analyses of the tensile strength. some important conclusions have been given in the paper

    主要有以下幾個方面:在大量二維編織c sic復合材料力學常規性能的實驗基礎上得到了拉伸實驗中卸載和卸載模量,卸載模量和加載斜,加載斜和應力等之間的關系,並在此基礎上得到了模擬同種材料拉伸線的非線性的應力?應關系;配合我們的實驗過程進行初始損傷和缺陷的檢測以及實驗過程中材料損傷演過程的動態無損檢測;對我們現有的二維編織c sic復合材料拉伸強度數據進行了分佈擬合。
  15. Studying on simplification algorithms of " points cloud " data, putting forward three kinds of simplification algorithms of " points cloud " data according to the point number of data set after simplification and the density of data set and the uniformation of curvature change at control point by b spline curve interporlation

    雲」數據演算法的研究,提出了按指定數據集的個數、按數據集的密度閾值和按b樣條線插值型值是否均勻簡雲」數據的三種演算法。 3
  16. Secondly, the effect of transverse deforming on the property of the wedge pressing was studied. the results showed that : the wedge pressing stock with the transverse deforming amount of 10 % acquired the best performance. the highest density got the biggest rate of slope while with the amount of 30 % the curve was more some special structure and performance as following : the large porosities was crushed into small or linear ones with the high - direction deformation amount of 20 % ; as the increasing of the high - direction deforming, the particles got a further deforming, the porosities got a further crushing, the small porosities were mergered by the large ones and the former then disappeared ; when the amound reached 60 %, the quantity of the porosities would obviously decrease which made the materials compact, the microstructure more uniform and the density and hardness curves more horizontal, the relative desity could reach 99. 7 %, the tensile strength b of the as - compacted samples reached 408mpa with the yield strength s teached 289mpa and the elongation percentage reached 13. 6 %. in addition, the microstructure of the wedge pressing stock under the pressing temperectureof 450 was uniform, the porosities and the boundries of the grains basically disappeared and the conjunction between particles was great

    採用雙向楔形壓制,大尺寸噴射沉積5a06鋁合金楔壓坯的組織和性能具有如下特:當高向形量為20 %時,大的孔洞形破碎為小的孔洞,或呈線狀孔;隨著高向形量的增加,顆粒進一步形,孔洞進一步破碎,大孔「吞併」小孔,小孔塌陷並逐步消失;當高向形量達到60 %時,孔洞量大為減少,材料基本緻密,組織趨于均勻,楔壓坯料的密度、硬度線接近水平線,坯料的相對密度達99 . 7 % ,抗拉強度_ b = 408mpa ,屈服強度_ ( 0 . 2 ) = 289mpa ,延伸= 13 . 6 % ;對比其它的壓制溫度,在450楔形壓制的坯料組織均勻,孔洞及顆粒邊界基本消失,顆粒之間冶金結合良好。
  17. Point of inflection

    曲率變化點
  18. On the basis of this, the effective reflective index with the variation of the carrier density is discussed. this paper also analyzed the random facet phase and the length of the cavity ' s influence on threshold characteristic. especially, the wavelength tuning characteristics have been investigated in detail when one segment works as absorbed region

    在此基礎上,研究了每一段等效反射線隨載流子濃度的情況;分析了邊界相位的不確定性以及激光器腔長對閾值特性的影響;重討論了其中一段工作在吸收狀態下的波長調諧性質。
  19. This paper utilizes the software matlab to program the each working volume. it helps to analyze the volume change curve. at the same time, comparison with combination profile compressor and single circle compressor is presented, with the result that combination profile compressor has the advantages of high efficiency, little leakage and high quotient of volume using

    論文運用matlab數學軟體對新型組合線渦旋壓縮機的各個壓縮腔的容積進行了編程運算,對各個壓縮腔容積的規律給出了幾何直觀的描述,並且對組合線壓縮機和圓漸開線的壓縮機進行了性能對比分析,證明組合線渦旋壓縮機具有效高、體積利用系數大等優
  20. According to the supply system composed by parallel connection water pump, many kinds of operation proposals in a single pump were put forward to provide the greatest possible flow on both sides of the demarcation point in the scope of the flux changes ; identified the system of pumps, electromotor, speed governor imitate method of characteristics curve of the power device and its rotating speed, efficiency, energy consumption calculation under different condition ; the analytical methods used for the operational plan for comprehensive evaluation of the economic and safety and optimal results

    摘要針對由並聯水泵組成的供水系統,提出了在以單泵可能提供最大流量為分界的兩側流量范圍內具有多種運行方案;確定了在不同工況下,該系統中水泵、電機、調速器特性線的擬合方法及其各動力裝置中轉速、效、能耗的計算式;採用解析的方法對各種運行方案進行了經濟性和安全性綜合評價,並給出最優結果。
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