Based on the force constant model we calculate the phonon dispersion relations of single wall BC_3 nanotubes with different diameters and chiralities.
引用石墨经验力常数计算碳纳米管声子色散关系时 ，必须处理由二维平面卷曲形成三维实体纳米管所引入的问题 。
When he plugged that wind-force equation into his model and assumed that the probability of a branch breaking due to wind stress is constant, he came up with Leonardo's rule.
他将风力公式应用到他的模型中，并假定树枝受到风力作用而断裂的概率是恒定不变的，据此他推导出了达·芬奇公式。
One of the basic assumption of the simple catalytic model is that during the period of the diseases prevalence, the force of infection is a constant.
简单催化模型的一个基本适应条件是：在疾病流行期间其感染力保持恒定。
The double compound Poisson risk model under constant interest force is considered.
考虑了常利力下双复合泊松风险模型。
The finite time ruin probability of the risk model with constant interest force was considered.
考察了有利息力风险模型的有限时间破产概率问题。
The electric constant force hinge of the utility model has convenient operation and low cost.
本 实用新型的电动恒力铰链操作方便、成本低廉。
In Chapter 2, two moving average risk models are introduced to model the surplus process, and the probabilities of ruin are examined in models with a constant interest force.
在第二章，我们分别用二个滑动平均模型去模拟盈余过程。在常值利率的作用下我们来研究该类模型的破产概率。
In Chapter 2, two moving average risk models are introduced to model the surplus process, and the probabilities of ruin are examined in models with a constant interest force.
在第二章，我们分别用二个滑动平均模型去模拟盈余过程。在常值利率的作用下我们来研究该类模型的破产概率。
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