不变

On defining the conditional threshold of discretized density evolution, a method for designing the time-invariant quantized decoder with finite levels, which can approach the optimal time-varying one and hence the continuous decoding, is proposed.

应用Shannon率失真理论以及密度进化理论，阐述了最佳量化译码的时变特性，建立了离散密度进化的条件阈值概念，提出了二元输入对称信道上逼近最佳时变量化译码、进而接近连续译码的时不变量化译码设计方法，推导了量化和积算法与最小和算法的等价条件，从误码率性能、错误平层和平均迭代次数等三个指标全面衡量量化译码性能； 5。

Should be one kind of day changes the diastrophism sentiment invariable feeling, is the testimony years, the testimony sentiment feeling.

该是一种天变地变情不变的感觉，是见证岁月、见证感情的感觉。

You and I remains the same in different time, at different places,among differ ent people; time is changing, space is changing and everything is changing exc ept my miss to you!

不同的时间，不同的地点，不同的人群，相同的只有你和我；时间在变，空间在变，不变的只有对你无限的思念！

Using this method,we discussed for generalized Burger equation with variable coefficients and linear danping,obtained its symmetry group,simliar reduced equations,infinitesimal generator and Lie algebras;In chapter 6,using the Exp-function method,the generalized solutions of combined KdV-mKdV equation with variable coefficients are discussed.

首先介绍了Lie群分析法的基本思想，其次用Lie群分析法得到了带线性阻尼项的变系数广义Burgers方程的无穷小变换、无穷小算子的李代数结构，并具体求出了带线性阻尼项的变系数广义Burger方程的群不变解和约化方程。

The formation of martensite is accomplished by the immigration of well-defined glissile interface (121)fcc type and its misfit dislocations can produce the lattice invariant deformation on the basis of phenomenal theory of martensitic crystallography, however, LID is retarded slightly after the migration of interphase (121)fcc, i.e.a thin plate-like zone exists without LID in martensite near the well-defined interface. When the temperature reduces to the Ms point, the lattice parameter of austenite matrix is √3/2 times that of the martensite without LID. This critical condition for spontaneous transformation agrees with that the stack fault energy in matrix is less than zero according to Olson and Cohen's nucleation model.

通过模型分析表明：fcc/bcc马氏体形核与长大过程是通过(121)fcc型择优界面推移进行的，界面上的错配位错可以完成马氏体晶体学唯象理论要求的点阵不变变形，但LID要稍滞后于界面迁移，即在马氏体形核与长大过程中推移界面新相一侧存在一未发生LID的新相薄区；当相变温度达到马氏体相变点Ms时，母相奥氏体与这一薄区的晶格常数比为√3/2，这一几何条件和Olson-Cohen形核模型中要求扩展位错层错区界面能γ≤0是等价的。

On the assumption that a triplet of points is matched to another one as a whole beforehand, we give an effective algorithm based on P〓-invariants. On the assumption that there exists an arbitrary closed curve in the scene plane, using a technique named projectively invariant decomposition of planar shapes, we realize another efficient algorithm.

在假设已知一对三点组整体对应的前提下，基于对排序和投影同时保持不变的P〓-不变量，给出了一种有效算法；在假设场景点集所在平面内存在一条封闭曲线的前提下，利用平面形状射影不变分解技术，提出了另一种有效算法。

A tender price offered by a tender shall remain unchanged during the performance of the Contract, and shall not be modified because of any reasons.

投标人所报的标价在合同执行过程中是固定不变的，行过程中是固定不变的，不得以任何理由予以变更予以变更。

There is no wonder that human is a kind of strange animal,I remember a famous author is named 'MaoDun',on the other hand,it is said that to be a human sometimes is equal to be many inconsistencies, maybe today we laugh at a person ,just cause we deem him who always do something stupid,but many years later,when we are remind of such a person,we have to admit that the veriest stupid person are just oueselves,a proverb said by a former philosopher is that,still water runs deep ,but the world is no longer the world our philosopher had mentioned about,the world is becoming smaller and smaller,what about you...

这也难怪，人本来就是一个奇怪的生物，有个著名作家不是就叫茅盾么，说明做人有时是很矛盾的，也许现在我们因为他做一些自己看来很傻的事情而称他为傻子，然而若干年后再提起他时，我们却不得不暗骂自己是傻子，圣贤书中曾有云，大音如希，大象于无，大智若愚，可是这个世界再也不是圣人提及的那个世界了，地球变小了，你能不变么。。。

This method allows for a more accurate processing of boundary condition on the semiconductor layer in XLPE cable of stator winding than the standard finite element, so that the interlaminated issue of boundary condition on interface can be avoided. A general algorithm is applied to deal with both the Dirichlet and the periodic boundary condition in 2D or 3D magnetic field problem.

提出了用有限元法计算磁场问题时周期性边界条件和第一类边界条件的统一处理方法，利用该方法在不改变代数方程组阶数、保持系数矩阵性质不变和带宽基本不变的条件下，使两种强加边界条件能同时处理，简化了程序编制，并与寻址方法相结合，提高了计算速度。

You cannot eternalise a transient thing — only the changeless is eternal.

你不可能将短暂的设想成永恒－－只有不变随缘、随缘不变的方是永恒。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。