说明:双击或选中下面任意单词,将显示该词的音标、读音、翻译等;选中中文或多个词,将显示翻译。
您的位置:首页 -> 词典 -> 内波夹角
1)  internal-wave angle
内波夹角
2)  within-subtopic-field angle
主题域内夹角
1.
A subtopic-field segmentation technique based on the optimal control model was proposed,the object function of the optimal control model was constructed by the within-subtopic-field distance,the between-subtopic-field distance,the within-subtopic-field angle and the between-subtopic-field angle.
提出一种基于最优化控制模型的文本主题域划分方法,采用主题域内距离、主题域间距离、主题域内夹角和主题域间夹角等相关要素,构建了最优化模型的目标函数,进而通过对模型求解得到文本主题域的最优划分模式。
3)  Inter-component-beam-angle
单元波束夹角
4)  included angle
夹角
1.
The conclusion is drawn that the included angle of each branch of the blood vessel are equal by making a mathematical model of the vascular branches and analyzing the model from the view of optimization.
通过对血管分支建立数学模型,从优化角度进行分析得出每个血管分支夹角相等的结论,该模型为求出血管的条数和分支数,讨论血管的总长度提供了理论依据。
2.
The mathematical expression of included angle between ray axis and optical axis is also given.
计算出了光轴与光线轴夹角的具体表达式,把它应用到黄玉与堇青石中,发现夹角远小于1度。
3.
The test results show that the change of the included angle between the central axial lines of the branch and main pipes as well as the superficial gas velocity have a relatively big influence on the solid-phase flow distribution characteristics.
试验表明,变动支管与主管中轴线夹角与气体表观速度对固相分配特性具有较大影响。
5)  angle [英]['æŋɡl]  [美]['æŋgḷ]
夹角
1.
A Study on the Angle between the Ophthalmic Nerve and the Maxillary Nerve;
眼神经与上颌神经夹角的探讨
2.
Diagramming Study of the Angle Between a Line and a Plane;
直线与平面夹角的图解分析探讨
3.
Effect of false twister angle on production stability of PET DTY;
假捻器夹角对涤纶DTY生产稳定性的影响
6)  angle clamp
角夹
补充资料:-戊内酯、3-甲基丁内酯、咖吗-戊内酯
CAS: 108-29-2
分子式: C5H8O2
分子质量: 100.12
沸点: 207-208℃
熔点: -31-208℃

中文名称: 4-戊内酯、γ-戊内酯、3-甲基丁内酯、咖吗-戊内酯

英文名称: dihydro-5-methyl-2(3H)-Furanone、dihydro-5-methyl-2(3h)-furanon、4-hydroxypentanoic acid lactone、4-hydroxyvaleric acid lactone、4-methyl-gamma-butyrolactone、gamma-methyl-gamma-butyrolactone、gamma-valerolakton

性质描述: 无色至微黄色液体。凝固点-31℃,沸点205-206.5℃,83-84℃(1.73kPa),相对密度(25/25℃)1.0578,折光率(nD25)1.4301。能与水、许多有机溶剂、树脂和蜡等混溶。10%水溶液的pH为4.2。

生产方法: 由不饱和羧酸通过闭环反应来合成,例如乙酰乙酸与硫酸共热,或乙酰丙酸在镍、铜等催化剂存在下加氢。

用途: γ-戊内酯有较强的反应能力,可用作树脂溶剂及各种有关化合物的中间体。也用作润滑剂、增塑剂、非离子型表面活性剂的胶凝剂、加铅汽油的内酯类添加剂,用于纤维素酯和合成纤维的染色。γ-戊内酯具有香兰素和椰子香味。我国GB2760-86规定为允许使用的食用香料。主要用以配制桃、椰子、香草等型香精。
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