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spheroid n.1.扁球體;回轉扁圓體。2.〔美國〕棒球用球。

spheroidal

By driving expressions and using the method in numerical integration , the results of numerical calculations are analyzed , discussed and contrasted with different conditions , and they showed that there are evident differences in the mean attenuation , scattering , and back scattering cross sections of oblate spheroid particles when the variance is so small that it is near to zero namely it is the same as the rotatory axes are parallel with one direction and when h - polarized and v - polarized incident waves happened . these differences are depended on the relative differences in the average orientation of rotatory axes and the polarized directions of incident wave 通過公式推導和數值積分計算并對結果做了討論和分析,對比各種情況表明:扁橢球粒子群在方差很小接近為0時,與粒子群旋轉軸一致取向的情況相同,入射波水平極化和垂直極化時的平均衰減截面、平均散射截面、平均后向散射截面有明顯的不同,這決定于旋轉軸平均取向和入射波極化方向的相對差異。

To use valve body of an eccentric , the spheroid of an eccentric and the valve seat , then the valve lever make the rotary motion , in common path self - centering , closure process pass tighter and tighter , completely achieves the good seal , therefore the hemisphere of an eccentric valve seal performance safe ; when the valve opens or shuts , the spheroid and the valve seat completely withdraw 利用偏心閥體、偏心球體和閥座、閥桿作旋轉運動時,在共同軌跡自動定心,關閉過程中越關越緊,完全達到良好密封的目的,所以偏心半球閥密封性能安全可靠;閥門啟閉時,球體與閥座完全脫開。

Some differences in value may be due to the omission of the fluid viscosity . the hydrodynamic interactions between two approaching or disparting spheroids , between two parallel torpedo - type or airplane - type platforms , between fore - and - afterward symmetrical uuv or platform and parent submarine have been investigated numerically , from which some interaction laws are drew 另外還進行了以下受力計算:兩個相互靠近或遠離的橢球體、魚雷型平臺在壁面或潛艇附近運動、飛機型平臺在壁面或潛艇附近運動、首尾對稱魚雷狀uuv與潛艇相對運動。

Abstract : from a universal formula for calculating the attenuation cross section of particles in arbitrary shapes , exact expressions for calcualting the attenuation cross section of polydisperse , small spheroids , whose rotary axes are in specific status , have been derived . attenuation cross sections of both liquid and ice particles in different shapes at different wavelengths in microwave band have been computed and analyzed . the results are informative to microwave remote sensing of precipitation 文摘:從計算任意形狀粒子的衰減截面普遍公式出發,推導出了小旋轉橢球粒子群旋轉軸處于不同狀態時的衰減截面函數表達式,并計算分析各種狀態下衰減截面隨降水粒子相態、形狀和入射波波長的變化特征,所得結果可用于降水微波遙感。

But , here and certainly remember , calculator can t do - it - yourself design of , contain design oneself can design the stereo set system . ever there is a gambler to face a calculator to weave the to ask , if may weave to outs the procedure of a calculator , and can forecast who will in the horse game inside the outs , this plait the answer say : the is certainly , the matter that this right and wrong is often easy , only suppose a horse is the spheroid s 但是,在這里一定要記住,計算機是不會自己做設計的,只有設計者本人才能設計音響系統。曾經有一個賭徒向一個計算機編程員請教,是否有可能編出一個計算機的程序,可以預報誰將在騫馬比賽中騰出,這個編程員回答說: “當然可以,這是非常容易的事,只要假定一匹馬是球形的”

This paper has studied the mean attenuation , scattering , and back scattering cross sections of groups of small rotating spheroids about characteristics of microwave scattering when their rotatory axes are oriented at random in any direction in 2d plane and 3d space respectively under the condition of normal distribution , and that those physical quantities are changed with different variance , expectation and wave lengths of incident electromagnetic wave 本文研究旋轉軸方向分別在平面內和空間中隨機取向呈正態分布時的小旋轉橢球粒子群的平均衰減截面、平均散射截面、平均后向散射截面等微波散射特征,以及這些物理量隨軸向分布期望、方差及入射電磁波波長的變化。

The effect of reynolds number on rudder hydrodynamic performance is also analyzed . up to the stall angle the computed lift and drag agree well with measurements and other author ' s calculations , whereas stall angle , lift and drag beyond the stall angle are slightly under - predicted . the solver is used to investigate laminar and turbulent separated flows around a 6 : 1 prolate spheroid at high incidence angles and their effects on hydrodynamic forces 應用所開發的求解器,以naca0015翼型舵為算例計算了船舵在不同雷諾武漢理三;大學博士學位論文數下大舵角范圍內的三維粘性流場及水動力,成功地預報了舵的失速角和最大升力,并初步探討了雷諾數對舵水動力的影響;計算結果與現有試驗和計算數據比較,吻合程度相當好,初步檢驗和驗證了該求解器精確模擬粘性流動和計算水動力的能力。

Abstract : according to the similar nature of gravitational field and electrostatic field , using analogy method , the stress tensor in gravitational field is obtained from maxwell “ s stress tensor in electrostatic field , and the universal gravitation inside the isotropic spheroid is calculated with the obtained result 文摘:根據引力場和靜電場的相似性質,通過類比方法由靜電場的麥克斯韋應力張量得出了引力場中的應力張量,并用它計算了均質球體內部的萬有引力

The results show that the penetrability of powder loads can be improved when suitably reducing bulk density and grain size of gun propellant , increasing nitrogen content of nc and choosing oblate spheroid explosive respectively under the constant test conditions 結果表明,在其它試驗條件不變的條件下,適當降低發射藥堆積密度、適當提高發射藥中硝化棉( nc )含氮量、選用恒面燃燒的扁型藥、降低發射藥粒度均有利于提高射釘的穿透能力。

Currently , the familiar fiber - optic head : flat fiber - optic , spheroid fiber - optic and cylinder fiber - optic . according to the shape of pathological changes inside the human body organize to assurance which to be used 目前,常見的輸出光纖頭有平端面光纖、球形光纖以及柱狀光纖,其選擇取決于人體內病變組織的部位及形狀。

The kernel in spheroid has a smaller sound absorption coefficient than in non - spheroid . the thickness of grain sample is an important factor effecting on the sound absorption coefficient 糧食厚度也是影響其吸聲性能的一個重要因素,糧食厚度增加,吸收頻帶加寬,低頻吸聲系數增大,最大吸收峰個數增加,并向低頻方向移動。

The company can separately supply globe fittings manufacture , that is , final products spheroid , plastics fittings and complete set globe production assembly line 公司可單獨供應地球儀配件生產,即成品球體,塑料配件及成套地球儀生產流水線。

Super - k ' s photomultiplier tubes are much like lightbulbs the size of large computer monitors : evacuated glass spheroids , 50 centimeters in diameter 超級神岡的光電倍增管,是個像大型電腦螢幕那麼大的燈泡:直徑50公分、抽了真空的玻璃球狀物。

Eliminated has sealed the attrition of side effect , has overcome problem of the traditional ball valve and valve seat and the spheroid packing surface of wore 消除了密封副的磨損,克服了傳統球閥閥座與球體密封面始終磨損的問題。

These graphite spheroids are know as “ crack arresters ” in the ductile iron industry because of their ability to stop cracks in their tracks 在球墨鑄鐵行業內,這些石墨球稱為“裂縫終結者” ,因為它們具有阻止斷裂的能力。

This second route is preferred because of the reduced processing time required , and the greater perfection of the resulting spheroids 由于第二種方法可減少過程時間,并且最終獲得的球體更完美,所以第二種方法更好一些。

Research on the distribution of electric potential and electric field intensity outside the conducting spheroid 對導體球外電勢和場強分布的研究

Earth ' s spheroid 地球回轉橢圓體

In the other , spheroids form directly in the earliest stages of solidification 另一個是在固化的最早階段直接形成球狀體。