临界值

The critical aspect ratio of the fiber is defined as the crosspoint of the tangent value of the inflexion and the asymptote of the maximum elastic modulus.

将与曲线拐点切线和最大值水平直线交点相对应的长径比值定义为纤维临界长径比，将与此相对应的函数值定义为弹性模量临界值。

This value is prescribed only vaguely by many authors with no reference to any significance level. This paper will give out an asymptotic critical value in a fixed significance level and an asymptotic p-value for testing by means of extreme value theory in order to detect outliers in AR model.

本文运用极值理论给出诊断AR模型异常点选取临界值的分布近似方法，这种方法选取的临界值可保证控制在一定的显著性水平下，而且还可以计算出检验的渐近p值，比一般仿真选取的临界值更科学合理。

The amplitude has a critical value in its effect on BBD damping, when the amplitude is in excess of the critical value, the damping property of BBD is very good, otherwise, the damping property of BBD is poor.

振幅对BBD阻尼特性的影响有一临界值，当振幅大于此临界值时，BBD的阻尼性能迅速增大，而当振幅小于此临界值时，BBD的阻尼性能较小。

In order to study the stability of non-Newtonian fluid and its flow pattern discrimination method,the integral stability theory and local stability theory are applied to the concentric annulus flowing of plastic fluid and power-law fluid,then a relevant stability parameter expression of discriminating flow pattern is derived and set up in the paper.

针对非牛顿流体的稳定性问题及其流态判别的研究，将整体稳定性理论及局部稳定性理论应用于塑性流体和幂律流体在同心环空的流动中，建立和推导出相对应的判别流动状态的稳定性参数表达式。这些参数的临界值与牛顿液体流态准数雷诺数的临界值，同样具有与液体流变性无关的特点。

Based on the fictitious crack model and critical crack tip opening displacement CTODc, the precritical crack propagation length △ac of concrete was determined by means of three point bending beams. According to the calculation value of △ac, the effective fracture toughness KunIc of concrete was evaluated.

本文采用虚拟裂缝模型，将临界裂缝尖端张开位移CTODc作为控制参数，利用三点弯曲梁试件通过迭代求得了混凝土裂缝亚临界扩展量的临界值△ac，据此求得了混凝土起裂断裂韧度KiniIc、等效断裂韧度KunIc值。

The result shows that the changing law of saliferous reservoir parameters is a nonlinear relationship with several variables, and it is a very complicated process.

研究结果表明，高含盐油藏储层参数变化呈多元非线性函数关系，变化规律复杂；渗透率变化存在临界值，大于临界值时，渗透率随着驱替速度、驱替量和含盐量的增加而增大，小于临界值时，渗透率随着驱替速度、驱替量和含盐量的增加而减小；注入水性质会对参数变化过程有影响，而对最终变化结果无影响；盐的溶解是储层参数变化的根本原因，岩石颗粒的脱落和运移是储层参数变化的直接原因。

There existed dual-critical effect of such organic retarders as sucrose and citrin on cement hydration. First, when the amount was relatively low, cement hydration was delayed. While the amount was comparatively high, initial hydration of cement was accelerated, but paste was not hardened after a long time. Second, there existed a critical amount.

蔗糖、柠檬酸对水泥水化历程的调控作用存在双临界效应：一、在掺量较低时，表现为缓凝效果，当掺量较大时，则表现为促凝作用，但是浆体长时间不硬化；二、缓凝效果存在临界掺量值，低于临界值时，缓凝效果随掺量增加而增加，超过此临界值时，缓凝效果随掺量增加而下降。

For the entire subaqueous delta, accurate calculations for the critical value will depend upon a sound understanding of the sediment retention of the deltaic system. Moreover, it would be appropriate to consider two critical discharges, one for the maintenance of the delta volume, and the other for the maintenance of the surface area of the delta on land.

对于水下三角洲整体而言，应根据沉积物滞留指数来更准确地估算临界输沙率，而且需要区分2个&临界输沙率&，一个是保持三角洲体积的临界值，另一个是保持三角洲陆上部分面积的临界值。

The effects of C/Fe on desulphur rate is obvious different from the influence on content of sulfur in DRI, the mechanics of desulphur of pellet bearing carbon in DR process depends strongly on the exist constitution of sulfur in it.

含碳球团中的硫酸盐硫将残留在DRI中，文章据此提出了临界内配碳比的概念，当内配碳比低于临界值时，提高内配碳可以同时起到加速还原和脱硫的作用，当内配碳比高于临界值时，将会造成DRI含硫超标。

No differences were observed between the two groups for RDW. AUC ROCs of MCV, RDW and erythrocyte fragility in the diagnosis of thalassemia were 0.877, 0.630 and 0.796, respectively. The cut-offs of MCV, RDW and erythrocyte fragility was 88 fL, 15.9%, and 37.5%, respectively. The sensitivity and specificity of MCV were 92% and 73.5%, respectively, 73% and 58% for RDW and 85% and 75% for erythrocyte fragility.

在诊断地贫时，MCV的ROC曲线下面积为 0.877，最佳临界值为88fL，该临界值的敏感度和特异度分别是92%和73.5%；红细胞脆性的AUCROC为0.796，最佳临界值为37.5%，该临界值的敏感度和特异度分别是85%和75%；RDW的AUCROC为0.630，最佳临界值为 15.9%，该临界值的敏感度和特异度分别是73%和58%。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷