选择值

The principle for selection of cutoff value is investigated.

探讨了指示阈值的选择原则。

The cutoff of improvements may be useful in diagnosis of PD.

选择一定的UPDRS运动评分最大改善率为临界值可使该试验在帕金森病诊断中达到较高的敏感度和特异度。

At last, the growth mechanism selection of the decagonal quasicrystal was also achieved by means of changing the structure of the nucleation substrate, which provides the direct experimental evidence for the theoretical research of quasicrystal.

且当熔体过冷度大于临界值时，单相准晶生长将发生从侧向生长向连续生长的粗糙化转变，最后通过改变触发形核衬底结构类型实现了连续和侧向两种生长机制的自由选择。

The decay of ~(99m)Tc source was used to verify experimentally that in the measurement of the number of atoms of a radioactive isotope in a sample at time t_0, the error introduced through the inaccuracy of its decay constant can be reduced to a much smaller value by the careful selection of the time of measurement or measurements of its radioactivity at around one life time (1/λ) after t_0 and doing the calculation.

本文用~(99m)Tc源的衰变实验证明了：在测量一个样品中在t_0时的一种放射性同位素的原子数时只需精心选择一次或多次测量其放射性的时刻在t_0后约该同位素的一个寿期(1/λ)，并进行计算，则由它的衰变常数或其半衰期(T1/2)的不准确性而引进的误差可以被降低到较小值。

The user can select a certain decibel level.

用户可以选择某一个分贝值。

The codingoperator expresses the genes with N-decimal system floating numbers, and then the genes are divided into integer part and decimal part. The two parts are encoded into chromosomes respectively. The corresponding selection, crossover and mutation operators are designed with the theory of symbol encoding and the properties of N-decimal system floating numbers.

该编码算子首先将每个基因值用N进制的浮点数表示，然后将其分为整数部分和小数部分，分别重新编码组成染色体；相应的选择、交叉、变异算子采用符号编码的思想，充分利用N进制浮点数的特点进行设计。

When solving a multicriteria decision problem, it is desirable to choose a decision function that leads to a solution as stable as possible.

因此，分析设定值的微小变动对决策结果的敏感度影响尤为重要，根据期望的要求选择一个决策函数，尽可能地求出一个稳定的解，这是求解决策问题的根本任务。

Living a simple life is no longer the default option, which can be a problem for some of us.

选择简单的生活方式不再是一个缺省值，对我们中的某些人来说可能是一个问题。

The better particle is selected in terms of its weight to ameliorate the diversity of samples, so that the degeneracy phenomenon is relieved.

按照粒子权值的大小选择较好的粒子用于滤波，以增加样本的多样性，从而缓解粒子滤波的退化问题。

The third experiment asked observers to judge visual thresholds of posterization on a display and a printer using six series of skin tones. The results show that the thresholds among dark/middle/bright regions are device dependent.

结果显示两者皆会发生色调分离现象，影响阶调较大的是色彩复制模式的选择，暗部阶调都会受到较大程度的压缩，档案中间调的彩度值都比实际测量要高出不少。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。