可逆性

At the end of this paper, we investigate the invertible problem with the watermarking algorithms, and analyze the situation of image ownership dispute caused by the possible counterfeit attack for the reason of invertibility. Then we discuss one method based on one-way hash function to make the watermarking algorithms non-invertible, and another one using the time stamping protocol, to prevent the counterfeit attacks.

本文随后研究了水印算法的可逆性问题，对于由此可能发生的伪造攻击致使对图象所有权产生争议的情况作了分析，并且讨论了基于单向Hash函数的使水印算法不可逆的方法，以及采用时间戳协议以阻止伪造攻击的方法。

Integrating the advantage of shorttime window Fourier transform and wavelet transform, Stransform has many characteristics such as linearity, lossless invertibility, high timefrequency resolution and so on.

之后发展起来的S变换时频分析方法综合了短时窗傅里叶变换和小波变换的优点，具有线性化，无损可逆性以及高时频分辨率等特性。

Since the distribution uniformity of the light energy of the system is satisfactory on the circle of 0.5～10m radius and the beam path of the system offers an advantage of invertibility, it can be used in the fuse of the missile with the feature of WFOV emission and reception.

由于在半径为0.5～10m的圆周上光能量均匀性非常好，且系统光路具有可逆性，因此可用于大视场发射和接收的导弹引信中。

This paper studies on weak invertibility of a linear finite automata based on its matrix model,gets a full and essential condition on which a linear finite automata weakly and invertibly delays finite steps,and also gives an algorithm whether or not a linear finite automata has weak invertibility .

主要讨论了基于矩阵模型表示的线性有限自动机的弱可逆性，利用矩阵模型得出了线性有限自动机延迟有限步弱可逆的充分必要条件，并且给出了线性有限自动机是否具有弱可逆的算法。

Since the distribution uniformity of the light energy of the system is satisfactory on the circle of 0.5～10m radius and the beam path of the system offers an advantage of invertibility, it can be used in the fuse of the missile with the feature of WFOV emission and reception. The system is comparable to its counterpart abroad.

由于在半径为0.5～10m的圆周上光能量均匀性非常好，且系统光路具有可逆性，因此可用于大视场发射和接收的导弹引信中。

We haven't seen that irreversibility.

我们没有看到那种不可逆性。

It is the change from an ordered arrangement to a disordered arrangement which is the source of the irreversibility.

从有序的排列到无序排列的变化是不可逆性的起源。

The question then is, what in my experience secures that irreversibility.

于是问题就是，在我的感知中什么东西在维护不可逆性？

The origin of the irreversibility observed in nature is one of the oldest and most intriguing problems in statistical mechanics.

不可逆性的起源是统计力学中一个古老而重要的问题。

There must have been a time billions of years ago when life crossed the threshold of irreversibility.

数十亿年前，生命肯定有过一次跨越不可逆性门槛的行动。

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。