似中線 的英文怎麼說

中文拼音 [sìzhōngxiàn]
似中線 英文
symmedian
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  1. Leaves tufted ; stipes 15 - 30 cm long, densely scaly at base, glabrous above ; sterile lamina about 60 cm long and 20 cm wide, simply pinnate ; pinnae numerous, alternate or subopposite, linear - lanceolate, the largest about 12 cm long and 1 cm wide, base cordate, apex acuminate, margin finely toothed ; veins close, forking once or twice and forming areoles near the midrib ; fertile lamina similar to sterile ones, but somewhat reduced, about 8 cm long and 0. 4 cm wide, lower surface almost entirely covered with sporangia

    葉簇生；葉柄長15 - 30厘米，基部密被鱗片，向上近光滑；不育葉片長約60厘米，寬20厘米，一回羽狀；羽片多數，互生或近對生，線狀披針形，最長者長達12厘米，寬約1厘米，頂端長漸尖，基部心形，邊緣有細密鋸齒；葉脈1 - 2次分叉，近中脈形成網眼；能育葉與不育葉相似，但較小，長約8厘米，寬約0 . 4厘米，下部滿布孢子囊。
  2. Abstract : considering the second nearest - neighbor interaction and cubic, quartic anharmonic interactions simultaneously, we employ the multiple scales method combined with a quasidiscreteness approximation to calculate the lattice vibration. it is shown that the kind of nonlinear chain exhibits envelope soliton, envelope kink and envelope antikink soliton. these results can also be used to explain the experimental phenomena that the kink amplitude of the self - localized structure is determined only by the intrinsic properties of its lattices

    文摘:同時考慮次近鄰諧振相互作用和三次方、四次方非諧相互作用，利用多重尺度結合準離散近似方法去計算晶格振動行為，發現一維非線性點陣中存在包絡孤子及正扭結型包絡孤子、反扭結型包絡孤子，解釋了自局域結構的幅度只取決于點陣中的固有參數的實驗現象
  3. Optimized association rules are permitted to contain uninstantiated attributes. the optimization procedure is to determine the instantiations such that some measures of the roles are maximized. this paper tries to maximize interest to find more interesting rules. on the other hand, the approach permits the optimized association rule to contain uninstantiated numeric attributes in both the antecedence and the consequence. a naive algorithm of finding such optimized rules can be got by a straightforward extension of the algorithm for only one numeric attribute. unfortunately, that results in a poor performance. a heuristic algorithm that finds the approximate optimal rules is proposed to improve the performance. the experiments with the synthetic data sets show the advantages of interest over confidence on finding interesting rules with two attributes. the experiments with real data set show the approximate linear scalability and good accuracy of the algorithm

    優化關聯規則允許在規則中包含未初始化的屬性.優化過程就是確定對這些屬性進行初始化，使得某些度量最大化.最大化興趣度因子用來發現更加有趣的規則;另一方面，允許優化規則在前提和結果中各包含一個未初始化的數值屬性.對那些處理一個數值屬性的演算法進行直接的擴展，可以得到一個發現這種優化規則的簡單演算法.然而這種方法的性能很差，因此，為了改善性能，提出一種啟發式方法，它發現的是近似最優的規則.在人造數據集上的實驗結果表明，當優化規則包含兩個數值屬性時，優化興趣度因子得到的規則比優化可信度得到的規則更有趣.在真實數據集上的實驗結果表明，該演算法具有近似線性的可擴展性和較好的精度
  4. Empirical likelihood ratio test for autocorrelation in linear model

    線性模型中自相關的經驗似然比檢驗
  5. Towards the research on two flood water of yuhe river in datong city during 2004, by measuring and comparing their discharge, sediment concentration 、 nutrient include organic, phosphorus, potassium, azote, the result shows that the nutrient content of the sediment is greatly larger than that of supernatant fluid

    摘要以2004年大同市御河乾渠兩場洪水為研究對象，對其流量、含沙量、養分（包括有機質，氮，磷，鉀）做了測定和比較，研究結果表明：洪水中下層泥沙中的養分含量遠大於上清液中的養分含量；洪水中整體養分含量隨著含沙量的增大而增大，並且養分含量和含沙量呈近似線性關系。
  6. Some reflective bright lines just like the edges of the polygon can be seen in the surface of starch grains while prisms of calcium oxalate can be seen in the parenchyma tissue, which have n ' t been reported before

    顯微特徵上，發現單粒和復粒澱粉粒表面有時可見類似多邊形邊緣的折光率較強的亮線，薄壁組織中可見草酸鈣方晶，以往文獻中未見記載。
  7. Blue and ominous, like the reflection of a furnace, or, let us say, like one of those gleams of ghastly fire that darted from bunyan s awful doorway in the hill - side, and quivered on the pilgrim s face

    有時候，從醫生的眼中閃出一線光芒，象是爐火映照似的，燃著藍幽幽的不祥之光，或者我們也可以說，象是班揚那山邊可怕的門洞中射出在朝聖者的臉上跳動著的鬼火的閃光。
  8. The main contents are as follows. ( 1 ) filter cloth and the surrounding soil mass are taken as an approximate isotropy in horizontal section, the relationship of stress and strain is studied, the anisotropy is fully considered, the constitutive model of filter cloth reinforcement fly - ash compound is obtained, it is tested with numerous indoor experiments. ( 2 ) the permeable coefficient is introduced into the constitutive relationship of soil mass with relevant seepage theory ( kozeny - carman experience formula ). the test of filter cloth depositing hi the condition of long term seepage flow is done hi the dissertation, the varying regular of permeable coefficient without pressure is presented

    本文首先對國內外的研究現狀作了回顧和總結，然後主要針對土工織物加筋粉煤灰復合體的本構關系和計算理論進行研究，主要內容有： （ 1 ）將土工織物和周圍土體視為一種近似的彈性非線性橫觀各向同性體，研究它的應力應變關系，充分考慮它的各向異性，得到土工織物加筋粉煤灰復合體的本構模型，然後通過大量室內試驗進行分析驗證； （ 2 ）引入有關滲流理論，即柯茲尼-卡爾曼（ kozeny - carman ）經驗公式，將滲透系數引進到土體本構關系中。
  9. The mcc is composite of meso -, meso - and meso - scale convective systems which have different structure and motion features. although circularly approximately on the satellite imagery, the mcc shows linear distributions of radar echo, torrential rain, thunderstorm, cumulonimbus and mesoscale physical parameters as a squall line

    它是中、和尺度對流系統組成的復合體，它在雲圖上近似圓形，其雷達回波、暴雨、雷暴、對流雲、中尺度物理量場等卻呈類似颮線的帶狀分佈。
  10. In the skeleton extraction, an novel approach for extracting the skeletons directly from the gray images is developed by simulating the procedure of water eroding the topography surface. the resultant skeletons are single - pixel width and connected. it also lies in the middle line of the object and keeps the topological properties of the original image unchanged

    在骨架提取方面，論文提出了一種通過模擬水流沖刷地形表面的過程來直接從灰度圖象中提取目標的骨架的高效演算法，它可以得到連通的、保持目標的拓撲屬性的、處在目標的中線上的、近似單象素寬度的骨架。
  11. A general synthesis model of mixed - point straight - line linkage in the general condition was established, and some key parameters in the equations were solved

    摘要採用解析法建立了一般情況下混合點近似直線機構綜合的通用數學模型，並給出了方程中關鍵參數的求解方法。
  12. So carry through the construction technology of typical sect of natm by shallow - buried summary on west fourth ring road buried culvert of beijing branch of the middle line of south - to - north water transfer project, which would offer reference for future similar projects

    其中，暗涵工程交叉管線眾多，在西四環立交橋樁基中間穿過，淺埋暗挖法施工有一定的難度，為此，對南水北調中線北京段西四環暗涵淺埋暗挖典型段施工技術進行總結，以為今後類似工程提供參考和借鑒。
  13. Because spca720a does n ' t support float calculation itself, and the color level and the luminance level of every point on tv screen is related with the other 4 point around it, it ' s hard to draw curve and slash. in fact, we choose to draw vertical line and horizontal line the approximate the curve and slash

    由於spca72oa本身不支持浮點數運算，並且tv中的每個點與它的色度和周圍的4個點的亮度有關，畫曲線和斜線比較難于實現，所以在實際實現中，我們用畫水平線和垂直線來近似曲線和斜線。
  14. We firstly study some aspects, such as the modulation ( ofdm ) in the physical layer and the media access control ( mac ) protocols, combining reliable data transmission with high - throughput access methods and real - time, quality - of - service ( qos ) features. some problems exist in tcp applications over plc, because the high bit error rate makes it difficult to estimate the round trip time ( rtt ) and causes unnecessary retransmission

    通過對現有的兩種產品（ homeplug和inari ）的mac協議：類似無線通訊csma ca協議（以競爭為基礎）和集中式的令牌環（ ctp ）協議（避免競爭）的媒質接入控制的原理進行分析和計算，對兩個協議進行了性能評價及分析了它們對qos的支持。
  15. With the increasing of montmorillonite content, the composites showed a trend of pseudo - solidlike at lower frequencies, the montmorillonite layers could align along the stress direction, and as a result, the dependence of dynamic modules on the frequency was quite different before and after suffering from large amplitude oscillatory shear

    然而當蒙脫土含量低於和臉或蒙脫土片層在基體中呈完全團聚狀態，則復合材料表現出與聚合物基體類似的線性粘彈特性。實驗發現，在熔體經大振幅振蕩剪切后，上述「類固.
  16. The relationship between sputtering conditions and the depositional speed shows : with working pressure 1. 2 pa, sputtering power 180w, the depositional speed of tio2 thin film is 40nm / h, and increases with the increasing of sputtering power. it can be also founded that the depositional speed is nearly proportional to the working pressure : within the range of 0. 3pa to 1. 6pa, the depositional speed increases linearly with the increase of ar pressure. with the enhancement of the substrate ' s temperature of sputtering or annealing, the resulted thin films show a tendency of decreasing in thickness, and increasing in refractivity

    本實驗是採用磁控濺射方法，在不同的溫度下制備了tio _ 2薄膜，並對薄膜進行了不同溫度和時間的退火處理，通過原子力顯微鏡（ afm ） 、 x射線衍射（ xrd ） 、掃描電鏡（ sem ）等檢測手段對薄膜的表面形貌和組成結構進行了分析，結果如下： （ 1 ）濺射工藝條件與薄膜沉積速度的關系表明：採用1 . 2pa工作氣壓， 180w的射頻功率tio _ 2薄膜的沉積速率為40nm h ，並隨射頻功率的增加而提高，呈近似的線性關系，在0 . 3pa 1 . 6pa氣壓范圍中，氬氣壓強升高沉積速率迅速增加，濺射溫度提高和退火處理能使薄膜的厚度減小和折射率提高。
  17. On the basis of some conclusion, we have proved that the schemes have second - order convergence accuracy for the time discretization, a two - level method for resolving the nonlinearity in finite element approximation of the stationary conduction - convection problems is presented

    在某些已有結論的基礎之上，我們證明了這種格式對于時間離散上的二階精度。提出了一種解決定常的熱傳導-對流問題的有限元近似中出現的非線性問題的兩層方法。
  18. It is always impossible to obtain accurate mathematics model for the practical industrial processes. the model under which the controller is designed is usually different to the real plant owing to model reduction, linearity approximations and the ignoring of the dynamics difficulty for modeling, the changing of the operating environment and other unmeasurable disturbances

    在實際工業過程式控制制中要想完全準確地建立被控對象的數學模型是非常困難甚至是不可能的，通過模型降階近似，非線性特性的線性化近似，以及忽略對象難以建模的動態特性、外部工作環境的變化和各種不可測干擾之後所得到的對象模型跟實際對象的特性存在一定的差距，這種差距往往可以看成是系統模型的一種不確定性。
  19. The working principles are as follows : when the factors of the second order mechanics model are proper, the relative displacement, body to shell, is linear to the acceleration of shell. so the acceleration of the second order system is measured by measuring the relative displacement with the optical reflection displacement theory

    其工作原理是：當二階力學模型的參數選擇適當時，力學模型中的質量塊相對外殼的相對位移與外殼的加速度近似成線性關系，所以採用光纖反射式位移傳感原理測量二階力學模型中的相對位移就可以達到測量二階系統加速度的目的。
  20. Sl is a process from molecular emission to bremsstrahlung. in the fifth chapter, we record the sl image resulted from ultrasonic cavitation and studied the relationship between the sl intensity and ultrasonic intensity

    液體在超聲的作用下產生的聲致發光強度與驅動超聲壓強的大小有關，經多次試驗發現液體中的超聲壓強與聲致發光的強度近似呈線性關系。
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