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1)  Ellipse dual-βdistribution model
椭圆双β分布模型
2)  ellipse cast model
椭圆散布模型
1.
This paper establishes the ellipse cast model of cluster-warhead and its simulating calculation method.
建立了子母弹抛撒的椭圆散布模型及其模拟计算方法,比较了椭圆散布模型情形下几种不同打击方法对打击效果的影响,给出了打击方法使用建议。
3)  β distribution model
β分布模型
1.
In this paper, the handle seal confining of size chain with βdistribution model was feasibly studied , new thoughts and ways to handle seal confining with β distribution model were discussed and the application of βdistribution model in analysis of mechanism precision was expounded.
β分布模型处理尺寸链封闭环进行可行性研究,论述用β分布处理封闭环这一新模式的思想方法,阐明β分布模型在机构精度分析中的应用。
4)  elliptical distribution
椭圆分布
1.
Based on considering the expected utility maximization problem under the assumption that the joint distribution of risky assets is an elliptical distribution.
对仅有风险资产且有有限多个其效用函数为一般凹函数的投资者参与的资本市场,在假设风险资产收益的联合分布为椭圆分布之下,通过考虑期望效用最大化问题,导出了市场出清条件下均衡价格向量存在的条件。
5)  elliptical model
椭圆模型
1.
New algorithm for judging transformer inrush current based on asymmetry elliptical model of flux and current;
基于磁通和电流不对称椭圆模型的变压器励磁涌流判别新算法
2.
The present paper presents a new method based on the elliptical model and artificial neural network for estimating the pose of human face.
基于椭圆模型和神经网络方法,提出一种人脸姿态估计方法。
6)  Ellipse model
椭圆模型
1.
To gain harm degree information of crops disease in real time, this paper studied one method to examine harm degree of the rice blast and the rice sheath blight with ellipse model: used ellipse to fit the biggest sickness spot of the rice blast, calculated the length of principal axis of ellipse and the compared with ma.
为了实时获取作物病虫害危害程度信息,该文研究了一种利用椭圆模型来检测水稻稻瘟病及水稻纹枯病的危害程度--用椭圆拟合水稻稻瘟病单株最大病斑,计算椭圆主轴长与人工检测的实际最大病斑的长度比较,分析两者相关性,结果具有极显著性;同理,用椭圆拟合水稻纹枯病单株高度及病斑最高处距基部的距离,计算两椭圆主轴长并求两者之比即可对水稻纹枯病危害程度进行检测,平均正确率在90%以上。
补充资料:N,N′-双(β,β,β-三硝基乙基)乙二硝胺
分子式:
CAS号:

性质:白色针状结晶。溶于丙酮、硝基甲烷、二噁烷、乙酸甲酯、乙酸乙酯和热浓硝酸,微溶于甲醇、乙醇和醋酐,不溶于水、乙醚、苯、甲苯、氯仿、四氯化碳和二氯乙烷。密度1.87g/cm3。熔点179.2~180.5℃。耐强酸,对碱敏感。爆速8.97km/s(密度1.842g/Cm3时);作功能力500ml(铅寿扩孔值);撞击感度(10kg,25cm)100%;摩擦感度100%;爆发点232℃(5s)。108℃下第一个48h放气量为0.96ml/g(真空安定性)。先令乙二胺与甲醛的缩合液与硝仿的硝酸溶液反应,然后用硝硫混酸硝化上述反应产物制得。可用作传爆药。

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