1) higher order bifurcation
高阶临界周期
1.
The higher order bifurcation of critical periods from a kind of planar polynomial systems is investigated,and the lower bound for the number of the critical periods for these systems is obtained.
讨论了一类平面多项式系统的高阶临界周期,并利用这一结果,估计了该系统的周期函数的临界点个数的下界。
2) Critical period
临界周期
1.
Theoretical analysis for microbend critical period of optical fibers;
光纤微弯临界周期的理论分析
2.
Micro-bend optical fiber sensors are analyzed by use of the light ray tracing that the micro-bend critical period of optical fiber sensor is the space repeat distances within the fiber, through which light ray transmits at the maximum incident angle, and the result is coincident with the couple made theory analysis and experimental results.
采用光线寻迹法分析微弯光纤传感器，指出其微弯临界周期即为光线以最大入射角在光纤内传播的空间重复距离，结论与耦合模理论分析及实验结果一
3) critical photoperiod
临界光周期
1.
pallens showed short-day type,and the critical photoperiod for diapause induction was estimated to be between 10.
在22℃条件下,研究大草蛉对光周期的敏感性,结果表明:大草蛉属短日照滞育型,在短光照条件下饲养获得的预蛹进入滞育状态,诱导预蛹滞育的临界光周期为10。
2.
The results showed that the critical photoperiods under 29 - 22 ℃ alternative/26 ℃ constant temperature of univoltine ACB from Gongzhuling and Dunhua were 15h48 /14h53 and 15h45 /14h55 , and those of bivoltine ACB from Gongzhuling and Baicheng were 14h33 /14h6 and 14h27 /14h15 .
在变温29～22℃条件下,一化性的公主岭和敦化玉米螟的临界光周期为15h 48min和15h 45min,二化性的公主岭和白城玉米螟为14h 33min和14h 27min。
3.
The critical photoperiod for diapause induction was estimated to be between 13L∶11D and 14L∶10D at 18℃, and between 12L∶12D and 13L∶11D at 21℃ and 24℃.
结果表明:沈阳地区的白蛾周氏啮小蜂属长日照型昆虫,以老熟幼虫进入滞育状态,但在不同的温度条件下诱导滞育的临界光周期不同,在18℃时诱导滞育的临界光周期处于13L∶11D和14L∶10D之间;在21℃和24℃时诱导滞育的临界光周期变短,处于12L∶12D和13L∶11D之间。
4) critical periodic point
临界周期点
1.
Rigorous coupled wave approach(RCWA) was used to calculate the value of twodimensional squarepillar subwavelenth grating s maximum period that allows only propagation of the zeroth diffraction order(the maximum period is also called critical periodic point).
用严格耦合波理论(RCWA)计算了当折射率取一系列离散值时的二维亚波长周期结构介质光栅出现一级衍射透射波的周期值,进而利用最小二乘法拟合出临界周期点随折射率的变化规律;利用一维单台阶和多台阶光栅在TE、TM偏振状态以及二维单台阶圆柱状光栅和二维金字塔结构多台阶光栅进行验证,发现它们同样满足临界周期点的变化规律。
2.
Rigorous coupled wave approach(RCWA) was used to calculate the value of one-dimensional(1D) subwavelenth metal grating′s maximum period that allows only propagation of the zeroth diffraction order(the maximum period is also called critical periodic point).
利用严格耦合波理论(RCWA)计算了一维金属亚波长光栅刚好出现一级衍射透射波时的周期/波长比(临界周期点),并利用最小二乘法拟合出临界周期点随光栅基底折射率的变化关系,即y=1/x。
5) Critical rotation cycle
临界旋转周期
6) critical period of the oscillation
临界振荡周期
补充资料：BCS临界温度`T_c`公式（formulaofBCScriticaltemperature$T_c$）
BCS临界温度`T_c`公式（formulaofBCScriticaltemperature$T_c$）
简称BCSTc公式。在弱耦合条件下所给Tc公式为：
`k_BT_c=(1.14)\hbar\omega_Dexp(-1//N(0)V)`
由此知Tc∝ωD，ωD为德拜频率。但$\omega_D\proptoM^{-1/2}$，M为同位素原子质量。实验指出，Tc∝M-α，对一般元素α=1/2。故上式给出了超导的同位素效应。实验结果又显示，当N(0)V≤0.2时，BCS理论结果与实验的符合很好；0.20＜N(0)V＜0.3时有1的误差；N(0)V＞0.3时则误差增大较迅速。这里N(0)和V分别是T=0K时费米面上一种自旋取向的态密度和电子间净的有效吸引相互作用势强度。所以Tc受弱耦合($N(0)V\lt\lt1$)的限制，其最高Tc也受到限制，不能接近ωD的最高值所对应的Tc。BCS理论机制估计的最高Tc一般约30K左右，对金属氢估计可达252K。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条