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1)  Umbrella Alternatives
伞形约束
1.
The Research about Umbrella Alternatives Tests for Rare Event Right-censored Survival Data and the Ruin Problem of Discrete Time Model under Stochastic Rates of Interest;
关于稀有事件右删失伞形约束检验和随机利率离散时间风险模型破产问题的研究
2)  umbrella ordering
伞型序约束
1.
By using the EM and ECM algorithm,the maximum likelihood estimate of the parameters which are restricted to the simple ordering,the umbrella ordering or the increasing convex ordering,are given whenever the covariance matrix is known or not.
利用EM算法和ECM算法给出了多元正态模型在协方差阵已知或未知的情况下,参数在简单序约束、伞型序约束和递增的凸序约束条件下的极大似然估计。
3)  constrained superplastic bulging process
约束胀形
1.
The constrained superplastic bulging process is investigated by a large rigid-plastic finite element method.
采用大变形刚塑性有限元法模拟超塑性材料轴对称锥形模约束胀形过程。
4)  constrained deformation
约束变形
1.
This paper presents a geodesic-based constrained deformation method for polygonal mesh models.
提出了一种基于测地线的多边形网格模型的约束变形方法。
5)  shape restriction
形状约束
1.
So, based on the typic double pinnate drainage of the Bailianhe basin, the nonlinear concentration model of scattering input which is established on the reservoir mode of series-parallel connection are presented in this paper with the shape restriction.
考虑到长江流域复杂的地形特征以及降雨时空分布变化对流域汇流的重要影响,通过引入形状约束条件,建立了以串并联相混合的水库模式为基础的流域分散入流非线性汇流模型,从而较合理反映了白莲河流域这种典型的双羽形水系的汇流特性。
6)  deformation constrain
变形约束
1.
A new method on deformation constraint to avoid super-elastic effect is proposed.
讨论了一种基于弹簧质点模型的织物变形仿真技术,并提出了一种变形约束技术。
补充资料:4-甲基伞形酮
分子式:
CAS号:

性质:又称7-羟基-4-甲基香豆素。针状晶体(由乙醇重结晶)。熔点194~195℃(旧文献称185~186℃)。溶于甲醇、冰醋酸。微溶于乙醚、氯仿,不溶于冷水。溶于浓硫酸同时发出蓝色荧光。可使热的氨态硝酸银还原。以间苯二酚与乙酰乙酸乙酯在浓硫酸存在下进行缩合制取。用作分析试剂(测定硝酸)。有镇痉、利胆药效。

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