临界

We deduce the formula of the critical thickness of ablator, and put forward the rule of how the thickness of ablator affect the velocities and the stability of flyer.

理论上从阻抗失配效应的临界密度公式，推导出了烧蚀层的临界厚度，并推广到飞片的情形，提出了烧蚀层厚度对飞片速度和稳定性的影响规律。

China Demonstration Fast Reactor was chosen for the reference core of ADS sub-critical fast reactor, mainly studying on the feasible of transmutation minor actinides from the spent fuel of PWR.

选取中国示范快堆作为次临界快堆参考堆芯，研究次临界快堆作为嬗变PWR乏燃料中次锕系元素的可行性。

The beneficial effects of homogeneously distributed boron inside grain on lowering the energy of antiphase boundary and improving brittleness are weakened.

低于此临界浓度，硼在晶内均匀分布；高于此临界浓度，硼在晶界上偏聚，上述硼在晶内均匀分布降低反相畴界能的有益作用被削弱。

The formula can be used in approximate calculation of instable critical load of high pier in the design and construction.

本文利用能量原理的Ritz法，在对截面惯性矩变化作线性假定后，推导出变截面空心薄壁高墩失稳临界荷载近似计算公式，可用于设计施工中对高墩失稳临界荷载的近似计算。1中心压杆稳定理论及能量原理中心压杆的失稳问题是稳定问题中的一个最基本的问题。

Choosing time delay as the control parameter, the stability of trivial equilibrium is discussed by analyzing distribution of the roots of the associated characteristic equation. It is found that Hopf bifurcation occurs from trivial equilibrium when the delay passes through critical values, then the critical values and their relations with system control parameters are obtained.

以时滞量为参数，通过分析对应线性系统特征方程的根的分布，讨论了平凡解的稳定性，得到了平凡解发生Hopf分岔而失稳的临界时滞量以及临界时滞量与系统控制参数的关系。

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。

It is proved that, when the value of critical threshold less than 1, the disease free equilibrium point is globally asymptotically stable. Further more, Bursaphelenchtis Xylophilus is used to construct the Lyapunov function, and the stability theory of Lyapunov function is used to prove that the equilibrium point is Global asymptotic stable. It explains that the Bursaphelenchus Xylophilus wiil eventually disappear.

证明了当临界阈值小于1时，无病平衡点是局部渐近稳定的，进一步利用巴尔巴欣公式构造Lyapunov函数，运用Lyapunov稳定性理论证明了该平衡点的全局渐近稳定性，说明松材线虫病会最终消失；当临界阈值大于1时，病虫害平衡点是局部渐近稳定的。

At the same time, the ballistic limit curves of the Whipple shield in a velocity range from 0.5 km/s to 5.5 km/s was obtained. Comparing to the predicted curve from Christiansen ballistic limit equation, the experimental minimum critical projectile diameter is slightly greater than the prediction.

通过固定弹丸直径，改变弹丸撞击速度，寻找临界撞击速度的方法获得了铝合金Whipple防护结构在0.5～5.5 km/s撞击速度区间内的撞击极限曲线，并与由Christiansen撞击极限方程得到的撞击极限曲线进行了比较，结果表明，实验最小临界弹丸直径略大于预测值。

Chinese bee have two fly peak, critical flight int...

中蜂有两个飞行高峰，临界飞行强度为3604只／小时；意蜂有三个飞行高峰，临界飞行强度为7669只／小时，强度大于中蜂而且意蜂的采集范围完全覆盖并明显大于中蜂。

Finally,we introducethe closure operations defined by Bondy[9]and Hanson[24]into the investigation ofthe hamiltonicity of 3-domination-critical graphs and shorten the proof of Wojcicka'sconjecture successfully.

最后，我们将Bondy[9]，Hanson[24]等人定义的闭包运算引入到3-控制临界图的哈密尔顿性质研究当中，成功地简化了Wojcicka猜想的证明，研究了3-控制临界图的哈密尔顿连通性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。