查询词典 backward difference

The basic concept in these sections is replacing backward Euler's method by modified backward Eulers's method to approximate the characteristic differential equation and discretizing the convection-diffusion equation at the middle point of the approximate characteristic curve, which will make the convective term get up to second order accuracy.

这三节的基本离散方法是用改进的Euler公式代替向后Euler公式来近似特征微分方程，并且将近似特征线的中点作为离散节点，使得对流项的离散精度提高到二阶，对于扩散项，将其转移到待求时间层进行离散。

In part 2, we study the properties of the solution z of backward stochastic differential equation and backward doubly stochastic differential equation.

第二部分分别研究了倒向随机微分方程和倒向重随机微分方程中解z的性质。

Huang and Lin proposed the weak solution concept for Backward Stochastic Differential Equation This paper based on the predecessor's work , gives the weak solution concept for Backward Stochastic Differential Equation with continuous martingale,uses the Girsanov transformation, obtains its weak solution of the existence of a necessary and sufficient conditions, and on this basis obtains its weak solution of the existence of sufficient conditions,these sufficient conditions weakened the drifting coefficient which requested in the existence uniqueness of strong solution to satisfy the Lipschitz condition the request.

本文在前人研究的基础上，给出由连续鞅驱动的倒向随机微分方程弱解的概念，利用Girsanov变换，得到其弱解存在的存在的一个充分必要条件，并在此基础上得到了其弱解存在的一些充分条件，这些充分条件减弱了在强解的存在唯一性中要求的漂移系数满足Lipschitz条件的要求。

Its on the oriental stage that a series of oncoming and dormant Oedipus tragedies-incest tragedies, with which the westerners are so familiar regardless of performance on the somewhere strange stage, are highlights, so that the western spectators not only can enjoy the different exotic cultural charms, but from the commanding perspective fell the superiority of their own culture in this fabricated cultural context featured with backward, isolation and far from the reality. In addition, Zhang prefers to the method of time lagging in the film text formation, so that the textual times usually drag back to the past on purpose such as 1930s, 1940s, per-anti-Japanese war period as well as 1960s and 1970s; apart from this, the far-off areas far from the cultural center are chosen as the film space, all which get together to set up a static, stagnate and hiding Chinese traditional cultural context symbolized by backward, barbarousness and ignorantness to satisfy the male desire.

为了营造这个虚拟舞台，张艺谋影片中的采用了时间的滞后性策略，影片中的故事本文时间均选择了过去：十九世纪三十、四十年代，抗战前期，六七十年代；影片中的本文空间均选择了远离文化中心的边缘地带，通过时间的滞后策略和空间的边缘策略来满足一个停滞的、凝固的、静止的落后而由愚昧野蛮的中国传统文化语境；将处于社会边缘的女性放置在其中，利用观众位置的双重性认同结构，巧妙利用女性这一表层可见视觉中心和读解影片时意义渐隐的策略来遮掩和移位其真正的作者意识形态：即重复再一次对女性的观看，满足东西方男性的窥视欲望。

Still will be the same as the Ministry of finance at the same time, research is built fall into disuse backward produce can exit a mechanism, raise capital allowance standard, exit condition, personnel to install buy law to wait, fall into disuse since work up backward produce can incentive mechanism.

同时还将会同财政部，研究建立淘汰落后产能的退出机制，提出资金补助标准、退出条件、人员安置办法等，逐步建立起淘汰落后产能的激励机制。

One day, Hershey was walking backward on the walkway while my grandfather was pushing a vat of chocolate up the ramp. Bump. Clunk. Ker-plop! Hershey fell backward into the vat. Everyone else held their breath and ran up to pull him out. Grandfather froze in fear. Was he going to lose his job?

一天，hershey在人行通道上倒着走路，这时候我祖父正推着大桶上了斜坡，咣当，克朗，扑通，hershey被大桶撞翻了压倒，所有的人都一下子停下来屏住呼吸，然后快跑过去把老板拉出来，祖父的心一下子被恐惧压倒，他可能会为此而失去工作了。

Analyzed the changing of energy loss in turbine cascade with different backward wedge angles,and achieved the range of the backward wedge angles corresponding of the minimum energy losses on three typical sections in the turbine cascade.

分析了叶栅能量损失系数随不同后楔角的变化，得到了在该涡轮叶栅内对应最小能量损失的3个典型截面上的后楔角的范围。

On this basis, we further analyze the situation of backward wave in anisotropic metamaterials with different dispersion relations, and the angle between wave vector and Poynting vector, and the general conclusion of backward wave propagation are obtained.

在此基础上，进一步分析了几种不同色散曲线关系的各向异性超常材料中倒退波的产生情况，获得了电磁波波矢和坡印亭矢量夹角的具体表达式和倒退波传播的一般性结论。

During drilling process, forward and backward redressing can be played the role to repair and maintain the wall of a well, making trajectory of borehole as far as possible to achieve ideal leading to drilling difficultly because of hole shrinkage, and so on, at the moment , the forward and backward redressing of this stabilizer can be played cutting, to eliminate hole shrinkage phenomenon, thus saving time and cost for drilling.

可在钻起过程中起到休整井壁的作用，使井眼轨迹尽量达到理想状态，防止出现狗腿现象。特别是在起钻过程中，往往由于井眼缩径等原因导致起钻困难，此时，该稳定器上的倒划眼齿可起到切削作用，以消除缩径等现象，从而为钻井节省大量时间和费用。

TO eliminate error caused by the rod being tipped forward or backward, the rodman waves the rod ,or tilts it slowly forward and backward,and the leveler takes the least reading. For less precise leveling, as when rod rcadings for ground points are determined to the nearest 0.1 ft, usually less care is exercised in keeping the bubble centered and the rod vertical,and the observations are no checked.

为了消除所造成的误差棒正在向前或向后，在罗德曼波杆，或倾斜，慢慢前进，后退，和矫直需要至少不到精密水准，如棒为确定地面点到最近的0.1英尺，通常较少照顾行使维持泡沫中心和棒垂直，没有检查。

We have something to do in the new stage.

在这段崭新的时期中，我们有一些要做的。

The difference between tourism decision-making under uncertainty and risky tourism decision-making is indistinctive.

其中不确定性旅游决策和风险旅游决策的界线比较模糊，两者的区分是相对的。