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之逆
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  the inverse
     Study on the Inverse Problem of LQ Optimal Control
     LQ最优控制之逆问题的研究
短句来源
     This paper introduces a recurrence formula for computing inverse matrix A~(-1) that derive itself from the solution of linear differential equations X(t)=AX(t) and finding the inverse of ei- genvalue matrix (SI-A)~(-1).
     本文由解微分方程组K(t)=AX(t),求A的特征矩阵之逆(SI—A)~(-1) 的过程,导出求n阶矩阵A之逆的一个递推公式.
短句来源
     In the case of N-soliton, the Zakharov-Shabat equations consist of 2N linear algebraic equations and one needs to find the inverse of a 2N×2N matrix.
     在求N-孤子解时,Z-S方程组由2N个线性代数方程组成,求解手续就是计算一个2N×2N矩阵之逆
短句来源
     This method is easy to be completed on compu- ter, and applicable to solve the inverse of high-order matrices.
     方法简单,运算过程规律,和其它求逆方法比较还具有精度高的特点,适合于高阶矩阵之逆,更便于上机计算。
短句来源
     However, the irreducible form of them given in the present paper only consists of N linear algebraic equations and one thus needs to find the inverse of a N×N matrix.
     而本文所得的它的不可约形式,是由N个线性代数方程组成的,求解只需计算一个N×N矩阵之逆,从而使计算量大大缩小。
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  “之逆”译为未确定词的双语例句
     Expressions for purging composition data and row vectors of inverse of modal matrix, which are helpful in simplifying calculation, are developed.
     本文提供了在运用特征向量法过程中对组成数据进行清洗的方法和有助于简化计算的模态矩阵之逆矩阵的行向量表达式.
短句来源
     The Estimate Theorems of Inverse Matrix Upper Bound about the Nondiagonally Dominant Matrix
     关于非对角占优矩阵之逆阵上界的估计定理
短句来源
     To specify, systemize, define and theorize this proposition will help the practice of the reverse consciousness in Chinese instrumental music culture, so as to explore a performance that differs from that of the Western instrumental music culture and that is characterized by Chinese instrumental music culture.
     四、中国器乐文化是一个返璞归真的实践,同时归纳出“中国器乐文化之逆返思维”命题,力图将“中国器乐文化之逆返思维”具体化、系统化、明确化、理论化,并把它定义为:“与道教内丹逆返修炼相似的、以逆返思维为特征的、使中国器乐文化达于‘希声’之境的思维方式。”
短句来源
     Inverse Operator Solution for KdV Equation with Initial Value Problem
     KdV方程初值问题之逆算符解法
短句来源
     In this paper, a new proof of E goroff theorem is given. The main results are as follows: Lemma 1 characterizes series of measurable functions which are convergent almo st everywhere, Lemma 2 characterizes series of measurable functions which are convergent almost uniformly, theorem 1 and its inverse, theorem 2 give a new pro of of well-known Egoroff theorem.
     介绍了叶果洛夫定理的一个新证明 ,所得的主要结果是 :刻划几乎处处收敛的可测函数列的引理1,刻划几乎一致收敛的可测函数列的引理 2 ,定理 1(叶果洛夫定理 )和定理 2 (叶果洛夫定理之逆 ) .
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  相似匹配句对
     The Moore-Penrose inverse of sums of matrices
     矩阵和的Moore—Penrose
短句来源
     On g Inverse of Matrix Products
     关于矩阵积的g-
短句来源
     The sum of inverse M-matrix
     M-矩阵的和
短句来源
     Reverse transcriptase
     转录酶
短句来源
     The Origins of the Cold War
     冷战
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  the inverse
Let ζ-1/2 be the inverse on the set of regular elements ofu of a square root of the discriminant of.
      
On the Uniqueness in the Inverse Conductivity Problem
      
The inverse conductivity problem to the the elliptic equation ${\rm div}((1+(k-1)\chi_D)\nabla u)=0\ {\rm in }\ \Omega$ is considered.
      
A Generalized Sampling Theorem with the Inverse of an Arbitrary Square Summable Sequence as Sampling Points
      
Irregular sampling and the inverse spectral problem
      
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Utilizing the latitudinal mean ot upper meridional wind of 1950 given by Buch and Starr and White, mean meridional circulation has been studied. Fig. 1-3 (fig. 1 for whole year, fig. 2 for winter, fig. 3 for summer) reveal three cells: two direct cells in low and high latitudes respectively and one indirect cell in middle latitudes. The average jet stream of 1950 is situated in the middle cell. The yearly average equatorial convergence zone is at about 5°N. From winter to summer all the three cells shift northward....

Utilizing the latitudinal mean ot upper meridional wind of 1950 given by Buch and Starr and White, mean meridional circulation has been studied. Fig. 1-3 (fig. 1 for whole year, fig. 2 for winter, fig. 3 for summer) reveal three cells: two direct cells in low and high latitudes respectively and one indirect cell in middle latitudes. The average jet stream of 1950 is situated in the middle cell. The yearly average equatorial convergence zone is at about 5°N. From winter to summer all the three cells shift northward. The Hadley cell of winter hemisphere extends to summer hemisphere. The intensity of these cells seems to be stronger in winter than in summer.Angular momentum balance for the latitudes 10°N-70°N for the year 1950 was also studied, and figure for stream lines for the transfer of angular momentum was constructed (fig. 5). The most interesting feature in this figure is that through the surface separating easterlies and westerlies the stream lines are vertical. Thus it indicates that the angular momentum generated in the easterlies is transported to the westerlies not in horizontal direction, but transported to upper westerlies in low latitudes by vertical motion. Then from there it is tiansfer-ed to middle latitudes. The mechanism of such transfer is as follows: In Hadley cell the upward motion in equatorial region and southern tropics carries more angular momentum due to earth's rotation, while the downward motion in northern tropics and subtropics carries less angular momentum due to earth's rotation. Thus in the mean angular momentum generated in easterlies is transported to upper levels.Finally the mechanism of maintenance of zonal circulation was discussed. The conclusion is this: In middle arid high latitudes gross disturbances are of primary importance while in low latitudes mean meridional circulation is important in maintaining zonal circulation.

本文利用了Buch和Starr与White所计算的1950年各纬度上空的平均经向风速([V]),绘制了子午面上的平均环流(全年:图1,冬季:图2,夏季:图3),图中显示出三个环型(cell),低纬度和高纬度的两个正环型与中纬度的逆环型。 1950年平均西风急流的位置正好处于中纬度的逆环流之中。全年平均的赤道辐合线位于北纬5°左右。自夏至冬三个环型均向北移,冬季半球Hadley环型伸向夏季半球去。三个环型的强度都是冬季大。 对于1950年北半球10°—70°的角动量平衡也作了分析(图4),并绘制了这个空间中角动量输送流线图(图5),其中应该提出,就是通过东西风的界面流线是铅直的,也就是总的来说,在东风带里产生的角动量不是在水平方向上输送到西风带里去,而是在铅直方向上输送到低纬度的高空西风里去,再由那里在水平方向上送到中高纬度去。 最后对于平均纬圈环流的维持也作了讨论,结论是:在中高纬度大型扰动起着主导作用,在低纬度则平均经圈环流是重要的。

The principle object of this paper is to seek an effective means in dealing with

本文的主要目的,在追求有效地、系统地处理大三角网的整体平差问题的办法,使之达到(1)计算的大量分工(2)计算简单,机械化(3)保证结果的精度均匀(4)当三角网逐次扩大时,原来的平差计算与结果永远可用(5)各种独立平差了的图形网的有效连接,成一整体(6)利用角方程的独特结构,编制成表,免去平差中这一部分的计算工作(7)高速度计算机的利用全文各节均利用分裂矩阵的办法,来达到分组演算的目的。第一节将大三角网各法方程未知数的系数所阻成的矩阵A,分裂成四个子短阵,而求其逆矩阵k=b_0+b_1+b_2+b_3+…+b_n这一办法收敛不快,但计算非常机械,正适宜于电子计算机与纸片打扎计算的使用,虽收敛上有小的缺点,但不因此而减少它在平差中的重要意义。第五节将法方程作几次分组,各组分别近似求未知数的值。经过58个法方程试验的结果,由6人计算约3天即可全部答解完毕。而且答解精度不受限制,随我们的要求而决定。这对于测量平差工作于时间与分工上显示了它不可忽视的作用,它开辟了大规模三角网整体平差的另一条非常优秀的道路。A~(-1)的求得,即Ak=ω的解k=A~(-1)ω的求得了。如果再加新方程时,以此时求得的A~(-1)当成A_(...

本文的主要目的,在追求有效地、系统地处理大三角网的整体平差问题的办法,使之达到(1)计算的大量分工(2)计算简单,机械化(3)保证结果的精度均匀(4)当三角网逐次扩大时,原来的平差计算与结果永远可用(5)各种独立平差了的图形网的有效连接,成一整体(6)利用角方程的独特结构,编制成表,免去平差中这一部分的计算工作(7)高速度计算机的利用全文各节均利用分裂矩阵的办法,来达到分组演算的目的。第一节将大三角网各法方程未知数的系数所阻成的矩阵A,分裂成四个子短阵,而求其逆矩阵k=b_0+b_1+b_2+b_3+…+b_n这一办法收敛不快,但计算非常机械,正适宜于电子计算机与纸片打扎计算的使用,虽收敛上有小的缺点,但不因此而减少它在平差中的重要意义。第五节将法方程作几次分组,各组分别近似求未知数的值。经过58个法方程试验的结果,由6人计算约3天即可全部答解完毕。而且答解精度不受限制,随我们的要求而决定。这对于测量平差工作于时间与分工上显示了它不可忽视的作用,它开辟了大规模三角网整体平差的另一条非常优秀的道路。A~(-1)的求得,即Ak=ω的解k=A~(-1)ω的求得了。如果再加新方程时,以此时求得的A~(-1)当成A_(11)~(-1),新增的方程当成A_(22),以同一的办法再求污A~(-1)来?

There are two subspecies of migratory locusts in China. One is Locusta migratoria manilensis Meyen, distributing in the east and south-east area, and the other Locusta migratoria migratoria L. in north-west area. The basic chromosome numbers of these two subspecies are all 2n=22+X in male. They both have individuals with supernumerary chromosomes. The behavior of these chromosomes in spermatogenesis has been described.We obtained several hybrid individuals from a cross, Locusta migratoria migratoria L.♀×Locusta...

There are two subspecies of migratory locusts in China. One is Locusta migratoria manilensis Meyen, distributing in the east and south-east area, and the other Locusta migratoria migratoria L. in north-west area. The basic chromosome numbers of these two subspecies are all 2n=22+X in male. They both have individuals with supernumerary chromosomes. The behavior of these chromosomes in spermatogenesis has been described.We obtained several hybrid individuals from a cross, Locusta migratoria migratoria L.♀×Locusta migratoria manilensis Meyen. The hybrid meiosis has been studied in detail. It is found that it is quite normal with exception of forming occasionally chromatin bridges in anaphase ⅠandⅡ. Several male hybrids, which have been studied cytologically, possess supernumerary chromosomes in addition to normal chromosome complement. These individuals are apparently resulted from an union of gametes with supernumerary chromosomes. The behavior of these supernumerary chromosomes in hybrids during meiosis is similar to that of their parents.In the hybrid, chromatin bridges accompanied with fragments formed by one of the large bivalents have been found in first and second meiotic divisions. These suggest that there is an inversion in one of the large homologous chromosomes of the parental individuals.The isolation mechanism in these two subspecies has been discussed. And we suggest that geographical isolation is one of the most important factors.

我国的飞蝗在分类学上分为两个亚种,即Locusta migratoria manilensis Meyen和L.m.migratoria L.。这两个亚种的染色体基数均为2n=22+X((?))。在这两个亚种的许多个体中常有超数染色体存在。这些超数染色体在成熟分裂过程中的行为已加以描述。 两个飞蝗亚种的杂种可以在实验室条件下获得。杂种精巢的成熟分裂曾进行观察分析,其分裂过程大多正常进行。杂种个体亦含有超数染色体,这是由于含有超数染色体的配子结合的结果,所以证明至少一部分含有超数染色体的配子是有机能的。杂种的超数染色体在成熟分裂時的行为与亲本的相似。 根据我们所观察的几个杂种个体的成熟分裂,在杂种的染色体结构差別中可能有一逆位区存在。由于逆位双价体发生交換,可以在后期Ⅰ看到形成染色质桥和断片或断片,在后期Ⅱ形成染色质桥等图象。 认为这两个亚种隔离机制中起主要作用的因子之一可能是地理隔离。

 
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