For standard validations like checking the name, length and format of an attribute, we can make use of validations provided by Active Record.
对于标准的检验(比如检查属性的名称、长度和格式)，可以使用ActiveRecord提供的检验。
As chunks are allocated from an active, fixed-length storage pool entry, eventually the space in that entry runs out.
由于从一个活跃的、固定长度的存储池条目分配了块，最终该条目中的空间耗尽。
The theory of statistical dislocation link length distribution is an active field in the modern microscopic quantitative theory of metal plastic deformation.
变形金属位错链长度统计分布理论是现代金属塑性变形定量微观理论最活跃课题之一。
Tectonic topography can reflect the structural deformation feature and active strength of faults, such as the height, length and gradient of a fault scarp as well as its continuity.
构造地貌能反映断裂的结构变形特征和断层的活动强度。例如断层陡坎的高度、长度和坡度以及断层陡坎的连续程度。
Once you select the thread geometry, the Length field, and the select Start button, the Circle radio button from the Selection Options and the action mode become active.
一旦你选择线程几何形状，长度的领域，选择开始按钮，圆单选按钮从选项的选择和行动模式成为积极的。
Numerical results indicate how the various parameters such as bulk resistivity and carrier diffusion length in the active region affect the profiles.
以数值结果揭示外延层的体电阻率及厚度、活性区载流子的扩散长度、模增益和丝区宽度等参量对上述各种分布的影响。
This article has shown that it is necessary to distinguish the eikonal function, effective optical path and geometrical length etc. of active medium while investigating optical resonators.
本文指出，在光学谐振腔的研究中应当区分用程函、有效光程、激活介质的几何长度等物理量。
In this paper, an experimental study on adaptive active control of sound trans-mission through a finite length water-filled cylinder in underwater is carried out.
本文研究了有限长充水圆柱置于水中，外声场透射形成的腔内声场自适应有源控制实验研究。
When the speed of earth rotation is slowing, the length of day is lengthening, and the earthquakes in North China are active.
地球自转速度变慢、日长变长、华北地震活跃，据此认为目前华北处于非强震活动期；
According to analysis of variance, the number of sorghum seedlings, root number, seedling length, root length, seedling fresh weight, root active absorption area, such as the relevance of better.
根据方差分析，高梁苗数、根数、苗长、根长、苗鲜重、根活跃吸收面积等相关性较好。
PI controller is used to control queue length of active queue management. But its trial method of controller tuning is aimlessness, the instant performance of algorithm is not enough satisfied.
I控制器常用于主动队列管理中，但参数整定上的试凑法具有盲目性，算法的瞬态性能也不够理想。
BNP assays not only recognize the full-length, biologically active molecule, but also inactive fragments and other byproducts of the degraded protein.
BNP实验不仅识别全长的生物活性分子而且识别非活性片段以及其它降解蛋白的副产物。
In this paper, the Artificial Neural Networks are applied to construct separately the relationships between magnitude and surficial fracture length and between magnitude and active fault length.
应用人工神经网络分别建立了震级与地表断裂长度及活断层长度的关系，一定程度上提高了由断裂或断层长度预测震级的可靠性。
Reducing input light power or increasing length and effective area of active layer, we can reduce the SOA chirp;
增加有缘层长度与有效截面面积，也有利于减小SOA的啁啾。
The catalytic systems containing the surface-active phosphine show a clear matching relation between the length of olefin chain and hydrophobic chain of the surface-active phosphine.
在催化烯烃氢甲酰化反应时，观察到烯烃与膦配体之间有一定的链长匹配效应；
The catalytic systems containing the surface-active phosphine show a clear matching relation between the length of olefin chain and hydrophobic chain of the surface-active phosphine.
在催化烯烃氢甲酰化反应时，观察到烯烃与膦配体之间有一定的链长匹配效应；
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