球縮度計 的英文怎麼說
中文拼音 [qiúsuōdùjì]
球縮度計
英文
ball compressor-
A highly efficient numerical algorithm by using multi - grid method ( mgm ) is introduced to solve the three dimensional field distribution in the present paper. formulae of the restriction and prolongation in mgm computation is deduced, and a 3d program of mgm is accomplished, which can solve the field distributions in electron optical systems for various electrostatic lenses. the 3d field distribution in an electrostatic concentric spherical model is tested with mgm algorithm and an algorithm based on finite difference method ( fdm ) respectively. comparing these two results in view of computational efficiency and computational accuracy, it appears that mgm is superior to fdm in solving electrostatic field distribution for the electron optics problem. this paper shows that the 3d field computation using mgm greatly improves the computational efficiency of field distributions in electron optical systems and shortens the computational time
本文將一種高效率的數值計算方法? ?多重網格法引入三維靜電場分佈的計算，多重網格法利用限制和延拓可迅速求得滿足精度要求的場分佈.研究了求解各種靜電透鏡電子光學系統三維場分佈的多重網格法程序，驗算了靜電同心球模型的三維場分佈.通過與目前在場計算中常用的有限差分法進行比較，可以看出多重網格法的計算效率和計算精度優于有限差分法.本文表明利用多重網格法計算三維場大大提高了場分佈的計算效率，縮短了計算時間，因此為后續計算打下了良好的基礎The annual variations of the longitudinal and latitudinal circle lengths demonstrate that the southern hemisphere appears to be expanding, while the northern hemisphere looks like contracting
計算地球經、緯圈長度的年變化率表明，南半球在擴張，北半球在收縮。Discrete approach with 15 ' 15 ' grid is adopted in order to numerically simulate and calculate the gravitational potential field generated by the homogeneous rotation - symmetric ellipsoid, and it is verified that the method, the fictitious compress - recovery and the fictitious downward continuation of the gravitational field, is reliable and valuable at the relative accuracy level higher than 10 ^ ( - 4 )
摘要採用15 ' 15 '網格離散化手段對均質旋轉對稱橢球體產生的引力位場進行了數值模擬計算，在相對精度優於10 ^ （ - 4 ）的水平上，驗證了引力位虛擬壓縮恢復法以及重力場虛擬向下延拓法的可靠性和有效性。Yet temperatures are rising ( about 0. 7 degrees celsius, or roughly 1 degree fahrenheit, since pre - industrial times, with an estimated further 0. 6 degrees from greenhouse gases that have already built up ), glaciers are retreating, sea levels rising, snow cover in the northern hemisphere declining, and the extent of arctic sea ice diminishing
但是全球平均溫度的確在升高（從工業革命前至今，已經上升了攝氏大約0 . 7度，或約略華氏1度，光是從現在已經累積起來的溫室氣體來看，估計還要再上升0 . 6度） ，冰河在後退，海平面上升，北半球的積雪減少，北極區的海冰也大幅縮小。New industrial organisational techniques, acceleration of flows, the reduction of design schedules, the use of new technologies, concentration and globalisation of the automotive equipment sector : these are just some of the changes now taking place
新的工業組織技術，流量加速度，縮短設計日程，運用新技術，汽車零部件行業的全球化和集中化：所有的這些都只是汽車工業變化中的一部分。分享友人