知道了这四个种族已经有至少一万年历史，科学家重新计算了病毒的“分子钟”，测量病毒的变异速度。
Knowing that all four strains were at least 10,000 years old, scientists recalculated the virus's "molecular clock," measuring how fast it mutates.
知道了这四个种族已经有至少一万年历史，科学家重新计算了病毒的“分子钟”，测量病毒的变异速度。
Knowing that all four strains were at least 10, 000 years old, scientists recalculated the virus's "molecular clock," measuring how fast it mutates.
也许是更好地适应了环境的变化，植株进一步的变异可能因此会以更快的速度涌现。
New variations of plants, perhaps better adapted to a change in environment, could therefore arise much more quickly than previously thought.
技术变迁的速度在整个供应链中也有变异的倾向。
The speed of technological change has also tended to vary throughout the supply chain.
为此，提出一种自适应的信息素更新方法和消除无效分配的变异策略，提高了收敛速度。
So an adaptive method of updating pheromone and a mutation strategy of clearing up invalid assignment were introduced to increase convergent speed.
在此基础上，进一步提出了混合粒子群算法和速度变异粒子群算法两种改进算法提高优化性能。
For improving the predicting results, two improved PSO algorithm are presented also in this paper: Velocity Mutation PSO and hybrid PSO.
该方法利用蚂蚁算法所具有的正反馈特性，再结合变异参数，使算法既有较快的求解速度又有较高的求解精度。
By using positive feedback properties of ant algorithm and mutation parameter, the algorithm has faster computing speed and higher solution precision.
同时，受魔方变换的启发，提出了一种新颖的魔方变异策略，以加快对迭代最优解进行局部优化的速度。
In addition, a novel magic cube mutation strategy, inspired by the magic cube transformation, is employed to accelerate evolution speed after each iteration.
采用交叉和柯西变异运算，提高了算法的收敛速度和精度。
The crossover operation and cauchy mutation operation are used to enhance the convergence performance and speed of the algorithm.
但是粒子群算法没有遗传操作如交叉和变异，而是根据自己的速度来决定搜索。粒子还有一个重要的特点是记忆。
But the particle swarm without the inheritance operation such as cross and variation, decided the searching according to its speed, and particle has an important memory character.
遗传漂变减少人口差异的速度比变异要快得多。
Genetic drift reduces diversity in populations more quickly than mutation can introduce it.
在猪断奶前的生长速度变异很大。
There is huge variation in pre-weaning growth rates of pigs.
实验表明，基于该算法的聚类系统对于大量的变异短文本处理速度可以达到每小时百万级以上，并且有比较高的准确率。
Experiments show that the clustering system based on this algorithm can depose millions of abnormal short texts per hour with high accuracy.
提出了一种新的变异算法，有效避免了路径重复，减小了运算量，提高了运算速度。
A new variation algorithm was described, which avoided the duplication of the paths, reduced the computation and improved the operation speed.
仿真实验表明，基于这种变异方法的免疫克隆选择算法可以很好地提高BP网络的学习速度，有效地避免算法过早收敛的问题。
The simulation results show that ICSA based on this method of mutation can improve the rapidity of learning BP network well and avoid prematurity effectively.
其中利用一种动态的交叉率和变异率，有效地加快了收敛的速度。
The GA implementation USES dynamic crossover and mutation probabilistic rate for faster convergence.
而最小值边界变异既能有效地限制了粒子位置或速度的幅值，同时可以保持粒子的飞行方向。
The minimum boundary mutation can limit the scope of particles' position and velocity, as well as keep the direction of them.
但随着成语使用频率的上升和信息传播速度的提高，成语的语义变异问题日益突出。
But with the rise in frequency of use of idioms and speed of information transmission, increasingly prominent problems of semantic variation of idioms.
分布在高速区的地震，主要活动在高速区内的速度变异地带。
The earthquakes in high velocity area were mainly occurred in variation belt.
探讨了原丝预取向度、拉伸温度以及拉伸速度对涤纶短纤维强度变异系数的影响。
The effects of grey yarn pre-orientation degree, drawing temperature and drawing speed on the strength variable coefficient of polyester staple fiber are studied.
机具行走速度越低，行内一致性变异系数越大。
When the working speed was lower, the coefficient of variation in the same rows was higher.
实验结果MEBO使细菌的形态结构、培养特性等方面发生变异，并明显地影响细菌的生长繁殖速度和侵袭力。
The results revealed that there were variations of morphological structure and cultural character of these bacteria and their proliferation rate and invasive power were also significantly reduced.
人类似乎已经加快了从通讯到气候变化几乎所有事物的速度，但是我们的遗传变异速率依然缓慢而稳定。
How fast are humans mutating? Humans seem to have accelerated the pace of just about everything from communication to climate change, but the rate of our genetic mutation remains slow and steady.
拉伸速度的变化对强度变异系数的影响不大。
The drawing speed has little influence on the strength variable coefficient.
用数据采集器对磨机的运动参数进行了在线测量，给出加速度曲线和加速度幅值谱图，据此计算出运转过程中的动态载荷均值和变异系数。
The movement parameter of this vibratom is measured on line by a data collector. The acceleration curve and amplitude are obtained to calculate the dynamic load in running.
并结合临床资料对变异毒株进行进化速度分析。
The molecular evolution in speed was carried out by way of analyzing the clinical data.
并结合临床资料对变异毒株进行进化速度分析。
The molecular evolution in speed was carried out by way of analyzing the clinical data.
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