这激起了一场争论,到底这种现象是误差,或是自然选择偏爱的结果(至少当它在群体中只占有稀少比例时)。
That has provoked a debate about whether the phenomenon is an aberration, or whether natural selection favours it, at least when it is rare in a population.
在选择数据的访问路径时,如果没有正确的列分布统计数据,DB 2可能没有足够的信息来做出最佳的选择,尤其是如果数据出现严重误差。
Without correct column distribution statistics, DB2 may not have enough information to make the best choice when choosing an access path to the data-especially if data is heavily skewed.
指示剂选择不适当可能给音量分析带来重大误差。
Improper choice of indicators can introduce serious errors into volumetric work .
为保证最大分辨率必须选用薄层,为使误差最小却须选用厚层,实际上通常选择介于两者之间的最佳厚度。
In practice, the selected interval thickness is usually a compromise between the need for a thin interval to maximize the resolution and a thick interval to minimize the error.
本文运用实验误差理论,对物理实验中的一种常见情况,推导出选择最佳实验条件的方法。
This paper discussed the problems how to choose the best conditions for a common situation in physics experiments.
本文主要阐述了称重传感器的工作原理、误差补偿、主要参数选择。并进行了技术经济性分析。
This text has mainly explained and weighed the working principle of the transducer, the error compensating, the main parameter choosing, and has carried on technological economy analysis.
选择最优参数的过程即是对以均方根误差最小为目标的整数规划问题的求解过程。
The process of which is to solve the integer programming problem with the objective function that RMSE is minimal.
在算法实现过程中,选择数值稳定性高、误差可以控制、计算工作量少和尽可能节省内存空间的算法。
In the course of algorithmization, we should select arithmetic with high numerical stability and controlling error and computational effort little and saving memory space.
传统的数据融合算法-卡尔曼滤波算法,在参数选择上要求较高,选择不当即导致较大误差,影响算法效果。
The classical data fusion algorithm-Kalman algorithm needs a tight choice of the parameters, any improper choice may result in great error and lead to bad effect of the algorithm.
讨论了物理实验基础知识中一次测量的误差估计、测量仪器精度的选择和有效数字运算等问题,并以实例予以说明。
The problem of error estimate in the primary measurement, the selection of measuring instrument accuracy and the calculation of the effective data are discussed and explained with examples.
本论文重点是对单产的重要因素之一的行驶速度测量装置及其传感器形式的选择和相关误差分析进行了研究。
This thesis study one of important factor in per unit area yield travel speed measure device and his sensor choice and relevant error analysis of form especially.
本文叙述了焦度计的误差,顶焦度标准镜片内表面弯度的选择原则,以及标准镜片的测量方法等。
This paper describes the error in focimeters, the principle of selection on curvature of inside face for vertex power of standard lenses and the method for measuring them.
核函数参数和误差惩罚因子的选择对支持向量机模型(SVM)的精度有较大影响。
The selection of the kernel function parameter and error penalty factor affected the precision of the support vector machine (SVM) significantly.
自然选择的目标是准物种,而误差阈的存在对生物体所能携带的基因组的长度施加了一个限制。
The object of natural selection is the quasi-species, and the existence of the error threshold places a limit on the genome length that the organisms carry.
系统采用了筛选计量采样图像的方法,排除了测量基准参考点选择不当的测量误差。
Using the sieving to calculate the samples of image, the system can remove the error when chooses the unapt basic testing reference.
并介绍了在线误差补偿硬件系统的实现方法,以及通过样本的合理选择和系统的学习来提高补偿系统的补偿能力。
The realization method of lined error compensation hardware system and the methods of advance its compensation ability by the reasonable selection swatch and by the system study were introduced.
在数控机床热误差控制补偿技术中,合理选择温度变量,是建立补偿模型的关键所在。
In the technology of thermal error compensation in NC machine tool, selecting the temperature variables rationally is key for setting the model of compensation.
而且,针对无监督图像分割的模型选择问题提出了带惩罚项的误差平方和阶次判定准则。
Furthermore, in order to solve the model selection problems of unsupervised image segmentation, the sum of squared error criterion with penalty term is proposed.
本文通过对滚动轴承的实验研究,分析了预测中权的选择和预测误差。
In this paper, the selection of weight facfor and the error in forecast based on experiment of rolling bearing are discussed.
本文详细地阐述了在物理设计性实验《误差分配和实验仪器选择》中进行CAI课件研制的设计思想和内容。
The article gave details of design thought and contents about developing CAI subject parts applied in physics design experimental-error distribution and experimental apparatus selection.
对已有水文资料的流量测验次数选择进行允许误差分析,是水文站开展水文巡测的前期性工作。
The analysis of tolerated error in the selection of times for flow tests in hydrologic data available is the initial stage work for a hydrologic station to launch hydrologic surveys.
代入最优阀值的渐近均方误差为我们提供了形状参数矩估计阶的选择依据。
Generation into the optimal threshold AMSE (asymptotic mean squared error) provide options for moment estimates order of shape parameter.
还计算了因忽略很高次数的谐波而造成的误差,论述了合理的脉数选择。
The errors caused by omission of the high-order harmonics are calculated and a reasonable selection of pulse number is discussed also.
阐述了一些复杂零件如何合理选择测量基准,以提高零件的测量精度,减小检测误差。
It is illustrated how to reasonably select measurement reference for complex parts in order to improve measuring accuracy and lower measuring error.
该技术首先对神经网络集成中的个体之间进行负相关处理提高个体的差异度,然后选择训练误差较小的个体来提高个体的精确度。
During the process of training, individual networks are trained using negative correlation learning to improve their diversity, and then networks with small errors are chosen to improve the accuracy.
介绍了选择五棱镜的方法和减小面形误差影响的方法。
The methods for selecting penta prism and reducing the effect of surface profile error on detection are introduced.
从本质上讲,人工神经网络的学习过程是一个优化的过程,即根据具体的误差信息来合理地选择网络的权重。
In essence, learning in artificial neural networks is an optimization process, that is, an artificial network adjusts the weights of the network on its concrete error information.
误差分析表明,只要合理选择参数增量,能保证所要求的加工精度的要求。
The error analysis indicates that the machining precision could be guaranteed just only selecting the reasonable parameter.
误差分析表明,只要合理选择参数增量,能保证所要求的加工精度的要求。
The error analysis indicates that the machining precision could be guaranteed just only selecting the reasonable parameter.
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