asymptotic approximation 中文意思是什麼
-
Angular distributions for some interesting states of 12b and 13c have been experimentally measured in hb ( d, p ) and 12c ( d, p ) reactions. the density distributions, rms ( root mean square ) radii, contributions of outside nucleon, etc., of the valence neutrons in these states are extracted by dwba ( distorted wave born approximation ) method and anc ( asymptotic normalization coefficient ) method, respectively
實驗測量了11b （ d ， p ）和12c （ d ， p ）反應中12b和13c幾個感興趣的核態角分佈，分別用dwba方法和anc方法從角分佈數據中抽取了各核態外層中子的密度分佈、 rms半徑以及外層核子的貢獻等，對這兩種方法作了比較。 -
Approximation of fixed points of generalized asymptotic quasi - nonexpansive type mapping
空間上廣義漸近擬非擴張型映象不動點的逼近 -
Firstly, the voronovskaja type formula of asymptotic expansion of this kind of operators is given. then the approximation of the bounded variation functions by the kinds of operators is discussed
第一節給出該運算元的voronovskaja型漸近展開公式；第二節討論該運算元對有界變差函數的逼近。 -
In chapter 3 we construct two approximation algorithms which applying bin packing algorithms for scheduling problems, one is ff ( first fit ) algorithm used in parallel machine scheduling problem pm / / dj = d / n which has a lower bound of asymptotic worst - case performance ratio, another problem is scheduling independent parallel tasks in parallel identical machine systems to minimize the makespan, we use strip packing method for it and give an approximation algorithm with asymptotic performance ratio no more than 1. 6
第一個演算法利用裝箱問題中的ff （ firstfit ）演算法求解極大化按期完工工件數的平行機排序問題pm d _ j = d n - u _ j ，該近似演算法具有漸近性能比下界。第二個近似演算法利用二維裝箱中strippacking問題的演算法求解以極小化makespan為目標的帶并行工件的平行機排序問題，該演算法的漸近性能比具有下界1 . 5和上界1 . 6 。 -
Up to now, most of the known upper bounds are asymptotic, and there is no polynomial approximation algorithm except, cor planar graphs which have a 2 - approximation algorithm
由於該問題的難度較大，近年來許多學者致力於研究其多項式可解的情形及上下界的確定。遺憾的是，到目前為止，仍未發現有效演算法。 -
An approximation algorithm a2 - 1 with absolute performance ratio 3 / 4 is proposed and the asymptotic performance ratio of a2 - 1 applied to the problem in which machines require prepare times is 2 / 3. another problem is two parallel machines scheduling to maximize the number of just in time jobs. for this problem we give a polynomial time optional algorithm in the case early penalty is larger or equal to late penalty, and it is proofed to be np - had when early penalty is less than late penalty
第二章所討論的另一個問題是帶提前和延誤懲罰的兩臺機排序極大化justintime完工工件數問題，當提前懲罰大於或等於延誤懲罰時，本文提出了該問題的一個多項式時間最優演算法a _ （ 2 - 2 ） ，從而證明了該問題是一個p問題，當提前懲罰小於延誤懲罰時，我們證明了該問題是一個np難的問題。 -
It is well known that the coupled interactions between the ship hull and the surrounding fluid field of explosion give rise great influence to both the fluid loadings over the structural wetted surface and the responses of the hull. jt is the coupling effect that provides the major difficulties in the underwater explosion induced dynamic responses of the ship structure. the second order doubly asymptotic approximation method ( dda2 ) has been commonly employed in the world to deal with the coupling effect
本文針對daa方法不適合於分析敷有聲阻抗與水差不多的聲學材料（如玻璃鋼與消聲瓦）的船體結構與水下沖擊波相互作用的局限性，依據聲波的反射和透射原理對二階daa方法的高頻段進行了改進，發展並提出了能夠分析聲學材料流固相互作用的adaa方法（ acousticdaa ） ，拓展了應用范圍，使現有的二階daa方法成為它的一個特例。 -
And by a monotone integral operator, we give an asymptotic approximation way which is further improving the older ways
並且使用一個具有單調性的運算元，給出了一種更實用更有效的對破產時刻赤字分佈函數漸進估計的方法。 -
Unicity differential identity and asymptotic property of quadratic pad 233 ; approximation of the exponential function
二元二次對角逼近的代數性質
分享友人