firs

美 [fɜrz]英 [fɜːz]
  • n.冷杉;枞
  • fir的复数
firsfirs

firs

频次

  • 1
    N-VAR 冷杉;枞
    A fir or a fir tree is a tall evergreen tree that has thin needle-like leaves.

  1. Community vertical structure levels of the five firs are clear .

    5种冷杉的群落垂直结构层次均明显。

  2. Any of various true firs having leaves white or silvery white beneath .

    冷杉属中长有白色或银白色叶子的植物。

  3. This is how one American traveller described his firs experience in watching Beijing Opera .

    一位美国旅行者这样描述他观看京剧的经历。

  4. The crow had perched upon a fir . She seemed to have steeled down to enjoy her provender with mouth half-closed , the dainty bit still in it .

    于是,乌鸦高高地躲在枞树的树梢,似乎要安顿下来开始享用美味。但是嘴里含着那一小块奶酪,心里还要思量一番。

  5. Research and Design of Efficient FIR Filter in Software Radio System

    软件无线电中高效FIR滤波器的研究与设计

  6. Study on comprehensive benefits of different cutting ways of Chinese fir

    杉木人工林不同采伐方式综合效益研究

  7. FIR Filter Design Based on All Phase Symmetric Frequency Sampling Method

    全相位偶对称频率采样法设计FIR滤波器

  8. The Feed back Control System With FIR Digital Filter

    采用FIR数字滤波器的反馈控制系统

  9. An Application of Genetic Algorithms in FIR Filter Design with Frequency Sampling Method

    遗传算法在FIR滤波器设计&频率抽样法中的应用

  10. Variable Density Volume Prediction Model for Chinese Fir Based on Artificial Neural Network

    基于人工神经网络的杉木可变密度蓄积量收获预估模型

  11. Study on the Building Techniques of Old China Firs ' Gene Bank

    老杉木基因库营建技术的研究

  12. A preliminary analysis on genetic variance component of Chinese fir

    杉木遗传变异组成试析

  13. A numerical method for computing the phase difference of fir interferometer

    一种计算远红外干涉仪相位差的数值方法

  14. Surface Performance of Chinese Fir Wood Treated by Microwave Plasma

    微波等离子体处理对杉木表面性能的影响

  15. A New Design Method for FIR Digital Trap Filter by use of Building Blocks

    模块法设计FIR数字陷波器的一种新方法

  16. The Design of a Linear Phase FIR Digital Filter

    线性相位FIR数字滤波器

  17. Study of linear phase FIR digital filters using non-ideal frequency characteristic models

    用非理想频率特性模型设计线性相移非递归型(FIR)数字滤波器的探讨

  18. A Design Method for Log FIR Digital Filter

    一种设计对数FIR数字滤波器的方法

  19. Study of High Temperature and Normal Temperature Drying of Chinese Fir Board in Plantation

    人工林杉木板材高温和常温组合干燥研究

  20. A Study on Spatial Distribution Patterns of Decadent Disease of Chinese Fir

    杉木立木干基腐朽病空间分布型的研究

  21. Directive Culture Forecasting Patterns of Physical and Mechanical Chinese Fir Wood

    杉木短轮伐期工业材物理力学性质预测模型的研究

  22. Studies of the Physical Properties of Clone Chinese fir Wood

    无性系杉木木材物理性质研究

  23. Evaluation on the Stability of Seed of Chinese Fir Seed Orchard

    杉木无性系结实稳定性的评价

  24. A test on genetic effect of elementary seed orchard of Chinese fir

    杉木初级种子园遗传效应的一个验证

  25. Contrast Test of Breeding After Seed Soaking in Different Time for Chinese Fir

    杉木种子不同浸种时间育苗对比试验

  26. A Comparative Study on photosynthetic Characters of Different provenances of Chinese Fir

    不同种源杉木光合性状的比较研究

  27. Research and Design of Narrow Band FIR Digital Filters

    高效窄带FIR滤波器的设计与研究

  28. Studies of Nutrient Dynamics of the Second Generation of China fir Plantation

    第二代杉木林养分动态研究

  29. A real-time harmonic detection system based on adaptive FIR predictive filter is presented .

    提出了基于自适应有限脉冲响应(FIR)预测滤波器的谐波实时检测系统。

  30. Application of NATURE-APPROXIMATING FORESTRY management method in young Chinese Fir Plantation

    近自然林业经营法在杉木人工幼林经营中的应用