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
Law enforcement agencies and the courts shall return as promptly as possible any property belonging to victims which has been held for evidentiary purposes
受害者有權
迅速取回財產執法機關和法院應該盡快把屬
于受害者但用作證物的財產歸還。
Then it expatiates on six problems about human resource management in company a. part three gives an account of the present advantageous situation of its development, and the difficulties it ' s facing. and then it gives suggestions according to the problems described in part two from the following points : 1
人力資源管理是一門新興的處
于迅速發展之中的學科,隨著社會經濟文化的變革,企業在人力資源管理中會不斷遇到新的問題,需要結合企業的實際不斷進行研究探索。
Decision of the standing committee of the national people s congress regarding the procedure for prompt adjudication of cases involving criminals who seriously endanger public security
全國人民代表大會常務委員會關
于迅速審判嚴重危害社會治安的犯罪分子的程序的決定
A sensitive surveillance system that can detect emerging influenza strains is essential for the rapid detection of a pandemic virus
一個能夠查明流感病毒株的流感監測系統對
于迅速發現大流行病毒至關重要。
Such rapid change unleashes stresses between societies and within them that could easily throw us off course - division where there is now international cooperation, stagnation where there is now growth, closed barriers where there is now open trade
變化過
于迅速時,社會之間及其內部的不安因素就會釋放出來,很容易將我們拋離軌道,造成割裂國際合作不復存在,經濟增長停滯,壁壘關閉開放貿易不再。
This paper emphasizes more on china ' s transition economy, hold that mere factors en institution changes tc influence money velocity should be paid attention, while all the traditional variables are considered
本文在考慮到傳統理論在解釋貨幣流通速度影響的同時,認為對
于像中國這樣一個處
于迅速變化的轉軌經濟國家,更應該著重製度變遷對貨幣流通速度的影響。
Information technology industry is a fast - growing industry in china
信息技術產業在中國正處
于迅猛發展的態勢。
Managers in different businesses do different things, and the entire field of management is changing rapidly as so many nations move from a manufacturing - based economy to a service - based economy
不同行業的經理做不同的事情,而且整個管理領域處
于迅速變化之中,因為許多國家正從以製造業為主的經濟轉向以服務業為主的經濟。
Socialism is still in the promising stage
社會主義仍然處
于迅速發展的階段。
The ability to find regions of free space quickly is critical for maximizing write performance, which is something that xfs is very good at
Xfs擅長
于迅速發現空閑空間區域,這種能力對
于最大化寫性能很關鍵。
All we can do is focus on quick, concise, effective communication
我們所能做的就是專注
于迅速、簡潔、有效的溝通。
With great development of economy, the construction of infrastructure, which is a main part of the investment on fixed assets, has rapidly increased in the past 10 years
在固定資產投資建設中佔有重要位置的基礎設施建設正處于迅猛發展時期,近10年來保持著較強的增長勢頭。