查询词典 exponential

Carl Sagan has entertainingly described this phenomenon, musing about the destiny of bacteria that reproduce by dividing into two every 15 minutes. Says Sagan:"That means four doublings an hour, and 96 doublings a day. Although a bacterium weighs only about a trillionth of a gram, its descendants, after a day of wild asexual abandon, will collectively weigh as much as a mountain...in two days, more than thesun - and before very long, everything in the universe will be made of bacteria." Not to worry, says Sagan: Some obstacle always impedes this kind of exponential growth. The bugs run out of food, or they poison each other, or they are shy about reproducing in public.

Carl Sagan 曾经开玩笑地解释这种现象，假设有一种细菌每15分钟可以分裂一次，亦即代表每一小时复制四次，一天可复制96次，虽然单一个细菌其重量只有一兆分之一公克重，但是只要经过一天无止尽的无性生殖，其重量可能会比一座山还重，经过两天后，甚至会比太阳还重，要不了多久所有的宇宙都将由这种细菌所组成，不过 Sagan 又说，大家不必担心，上天一定会安排障碍来阻止其倍数成长，有可能他会耗尽食物，或是毒死自己，或是有可能羞于在大庭广众之下复制。

Carl Sagan has entertainingly described this phenomenon, musing about the destiny of bacteria that reproduce by dividing into two every 15 minutes. Says Sagan:"That means four doublings an hour, and 96 doublings a day. Although a bacterium weighs only about a trillionth of a gram, its descendants, after a day of wild asexual abandon, will collectively weigh as much as a mountain...in two days, more than the sun - and before very long, everything in the universe will be made of bacteria." Not to worry, says Sagan: Some obstacle always impedes this kind of exponential growth.

Carl Sagan 曾经开玩笑地解释这种现象，假设有一种细菌每 15 分钟可以分裂一次，亦即代表每一小时复制四次，一天可复制 96 次，虽然单一个细菌其重量只有一兆分之一公克重，但是只要经过一天无止尽的无性生殖，其重量可能会比一座山还重，经过两天后，甚至会比太阳还重，要不了多久所有的宇宙都将由这种细菌所组成，不过 Sagan 又说，大家不必担心，上天一定会安排障碍来阻止其倍数成长，有可能他会耗尽食物，或是毒死自己，或是有可能羞于在大庭广众之下复制。

Moreover, our method presents the exponential convergence rate of the neural networks to stable equilibrium point.

此外，我们的方法还估计出了神经网络指数收敛到平衡点的速度。

Both exponential and Erlang distribution models for irrigation events are developed.

研究了指数分配和非指数分配模型及10个连续的灌溉周期。

In Chapter 4, in the two-dimensional euclidean space case, the identification problem for the constantly attenuated exponential Radon transform is further studied, and some theoretical and systematical results are obtained.

第四章在二维欧氏空间情形下，我们对常衰减指数型Radon变换的识别问题进行了更深入的讨论，获得了较系统而又深刻的结果。

An almost perfect nonlinear exponential permutation with high algebric degree is proposed, with some discussion on how to select the parameters of such permutation. The experimental result shows us a conjecture that there exists no such permutation over even dimensional space.

作者所取得的主要研究结果如下：(1)讨论了分组密码的条件攻击和技术攻击方法；全面总结了分组密码算法设计应当遵循的七项准则；概括了分组密码的四种强化技术；设计了一种新的三重加密方案NTE。

This impact is exponential change and the effects of this cycle and operational characteristics of the real estate funds have a direct relationship.

这种影响并且是成倍变化的效果，这与房地产的资金运行周期的特征有直接的关系。

The conclusion shows that the mean response time goes by the exponential trend with the change of the call intension.

分析和研究了事务处理系统的响应时间的分布规律，得出平均响应时间与呼叫强度成指数关系的结论。

And the amount of calculation load is less than the linear acceleration shift control method and the method which is based on the exponential rule to change speed.

而且它的计算量比线性加速度变速和基于指数规律加速度的变速控制小得多。

Experimental results show that the exponential expression can approprielly describe change of observation weight with distance,and the determination of loss index is of great importance.

结果表明，指数衰减形式能较好地描绘观测值权值随距离的变化情况；其中衰减指数的选取是关键。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。