本文对现有的变分不等式问题的二次外梯度投影算法进行分析，并对可行域为球的二次外梯度投影算法的计算过程进行简化。
This paper makes an analysis of this quadratic outer gradient project algorithms and simplifies the process of the computation of projection needed in this method for the case of domain being a ball.
如果天文学家能够观测到十亿光年外的螺旋星云的金属丰度梯度，我们就可以知道亿万年之前的梯度有多大，因此也就可以知道它是如何随时间变化的。
If astronomers could observe metallicity gradients in spiral galaxies billions of light-years away, we could see how steep the gradients were billions of years ago and thus how they change over time.
为了在单边核磁共振仪器外产生梯度恒定的磁场，提出利用基于拓扑优化和有限元法的优化设计方法。
To obtain a constant gradient magnetic field outside unilateral nuclear magnetic resonance (NMR), optimal design method based on finite element method (FEM) and topology optimization is proposed.
庆大霉素的峰值浓度和浓度梯度在动物之间的差异相当的大，这可能是由圆窗膜通透性的不同和外淋巴液流动率的不同所导致的。
Peak concentrations and gradients for gentamicin varied considerably between animals, likely resulting from variations in round window membrane permeability and rates of perilymph flow.
当梯度上升时间只有数毫秒时，外周神经兴奋是梯度场安全的上限指标。
For gradient ramp duration of less than a few milliseconds, mean peripheral nerve stimulation is a safe indicator of high dB /dt .
实验结果表明，镁在球墨铸铁件表面大量富集，在整个横截面上由外到内呈梯度分布状态。
Experimental result shows that the surface of ductile iron casting has a large amount of magnesium, and, there is a gradient distribution of magnesium from external to internal in the cross section.
这些元素的多样化组合产生不同的梯度水平，高性能梯度系统能成功抑制外周神经刺激。
A variety of configurations of these elements results in a range of gradient performance levels, and successful prohibition of peripheral nerve stimulation while providing high gradient performance.
用外循环流动无梯度反应器研究了CO氧化稳态动力学。
The steady-state kinetics of oxidation for CO over SmFeO_3 has been investigated with an external circulation flow reactor.
用外循环流动无梯度反应器研究了CO氧化稳态动力学。
The steady-state kinetics of oxidation for CO over SmFeO_3 has been investigated with an external circulation flow reactor.
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