• 该种正模标本存放北京师范大学鸟类标本馆

    The holotype and paratype specimens are deposited in the Bird Museum of Beijing Normal University.

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  • 本文讨论类非互易旋光张量面及简正模基本形式

    This paper discussed the basic form of the wave-vector surface and normal mode of nonreciprocal gyrotropic dielectric tensor.

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  • 称为正模标本,并且它必须一个好的条件下数字功能特性完好

    This is known as a holotype and must be in very good condition, with all its digits and features intact.

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  • 本文代数方法求出了耦合谐振子的简正模过程简单物理意义清晰

    Normal mode of coupled harmonic oscillator is obtained by means of algebra, the procedure is simple and the physical meaning is clear.

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  • 他们计划建造座和原来边境城镇一样复制品。

    They are planning to build a faithful recreation of the original frontier town.

    《柯林斯英汉双解大词典》

  • 栋扭曲变形建筑外面,店主地干脸上露出了笑容, 腋下夹着一台电脑高兴地喊道,"我工作的电脑!

    Out of one deformed structure, a shopkeeper, Kanichi Mogi, emerges with a smile on his face and a computer under his arm.

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  • 今天快速原型渐渐成为明天的快速生产

    Today’s rapid prototyping, in other words, will shade into tomorrow’s rapid manufacturing.

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  • 今天快速原型渐渐成为明天的快速生产

    Today's rapid prototyping, in other words, will shade into tomorrow's rapid manufacturing.

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  • 本文花键整体凹工艺、多挤压成形工艺、冷滚成形工艺、平板齿条搓挤工艺等花键冷成形技术特点进行介绍

    This article introduced some methods of spline cold forming technology: forward die extrusion die forming, mud-rolls die extrusion forming, cold rolling forming and plate type cold rolling forming.

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  • 用扫描电子微镜观察20多个失效金刚石拉丝口形貌。

    More than 20 pieces of failure wire drawing diamond dies were analyzed by SEM.

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  • 导出了平底锥形空心时单位挤压力的计算公式。

    The formulas of extrusion for hollow parts in the square dies and the conical dies has been derived.

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  • 折射率缺陷情形比较,负折射率缺陷相互作用对缺陷影响大,局域谱线更宽。

    Compared with the case of positive refractive index structural defects, the influence of the interaction between defects on defect modes is stronger, the spectrum-width of defect mode is broader.

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  • 利用K -泛函给出了一类多元三角多项式算子同时逼近逆定理

    Using the modulus of smoothness and K-functional, direct and inverse theorems of simultaneous approximation for a kind of multivariate trigonometric polynomial operators are established.

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  • 本文阐述工作于色散中的脉冲注入物理机制区别

    The article discusses the differences in physical mechanism of mode locking by laser pulse injection between the dispersion region at positive group velocity and that at negative group velocity.

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  • 得到下面主要结果:(1)各个高度水平风速涨落概率分布近于律。

    The main results are: 1. The horizontal wind speed fluctuations at any height may be approximated by a Gaussian distribution.

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  • 极点稳定局域能量,虚部是它寿命的倒数,自然地得到寿命为限制。

    The real part of the complex pole is the energy of an unstable localized mode, and the reciprocal of the imaginary part is its life-time. Naturally the life-time is positive.

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  • 基于滑移线简化流动,运用数学方法求解出了一种锥形挤压变形的最佳上限解,并将上限解通用解析式表达出来。

    The deforming force of cone-die direct extrusion is solved by a mathematic method based on the simplified flow model of slip line field.

    youdao

  • 基于滑移线简化流动,运用数学方法求解出了一种锥形挤压变形的最佳上限解,并将上限解通用解析式表达出来。

    The deforming force of cone-die direct extrusion is solved by a mathematic method based on the simplified flow model of slip line field.

    youdao

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