propagation coefficient
英
美
繁殖率；繁殖系数
双语例句
- Two new medium parameters related to acoustic attenuation are introduced and an acoustic propagation coefficient is defined.
本文引入两个与声衰减有关的介质参量，定义了声传播系数； - Studies were made on the vegetative propagation coefficient and cormels biological characters using eighth-excision in different development phase of Lycoris radiate.
在红花石蒜不同生长发育期进行八分法切割繁殖，研究无性繁殖系数和子球生物学性状差异性。 - Experimental Study On the Propagation Coefficient of PMMA
PMMA杆中波传播系数的实验研究 - The affinity of self-incompatibility in the mustard family affects the purity of hybrid seed and the propagation coefficient of stock plant.
十字花科自交不亲和性的大小关系到杂交制种的纯度和原种的繁殖系数。 - This nutrition liquid culture technology is one of the most effective method for rapid propagation of virus-free potato tube plants because of its high propagation coefficient, cheap cost, and easy learned techniques.
该法繁殖速度快，成本低，省人力，对技术人员要求不高，是脱毒马铃薯试管苗繁殖的最为有效的途径。 - In this research, the solid medium supplemented with plant liquid extract showed best results. After four week culture, the plant height reached up to 7.3 cm, node number 7.1, and the propagation coefficient was highest among all treatments.
在本试验中，固体培养方式下添加中草药萃取液的处理效果最好，成苗时试管苗的苗高达7.3cm，茎节数达7.1个，繁殖倍数高于其它处理。 - Study on Multiplying Buds Induction and Adjustment of Propagation Coefficient in Garlic
大蒜不定芽的诱导及其增殖系数的调节 - A variational expression of the propagation coefficient of the dominant mode in twisted rectangular waveguide is derived on the basis of the theory of the nonstandard eigenvalue problems, and the numerical results are compared with that of perturbation approach.
本文应用非标准本征值问题的变分方法求解了扭转矩形波导的传播常数，并同传统的微扰解做了比较。 - Determination of propagation coefficient for scalar modes in optical fiber
测定光纤标量模传输系数β（mn）的方法 - The results of quantitative analysis showed that the pre-tension deformation reduced the fatigue crack propagation threshold and increased the crack propagation coefficient, and consequently decreased the fatigue resistance of the part with mechanical damage.
定量分析表明：预拉伸变形降低了疲劳裂纹扩展门槛值，提高了裂纹扩展系数，从而使管线在机械损伤的部位疲劳抗力降低。 - Finally, the viscoelastic wave propagation in the bar and the influenced factors of the propagation coefficient are investigated with a set of experiments.
最后，通过系列实验研究了应力波在粘弹性杆中的传播规律，分析了不同因素对传播系数的影响。 - Further more, it also shows that the propagation coefficient is influenced by the velocity of the projectile, the shape of the incident wave and the diameter of the bar.
同时，子弹打击速度和入射波形的变化都会对传播系数产生一定的影响。 - CCD Camera Photographing in Detecting the Propagation Attenuate Coefficient of Polymer Waveguides
CCD摄象法测量有机聚合物光波导传输损耗 - The result showed that CEPA could promote the weight of the underground bulb effectively, stimulate the formation of bulb-lets and increase the propagation coefficient.
结果表明：CEPA可以有效促进东方百合地下鳞茎的增重，促进形成籽球，提高繁殖系数； - Study on Factors Affecting Propagation Coefficient of Aloe in vitro
影响芦荟离体繁殖系数的几个因素研究 - But adopted these methods which propagation coefficient was even little, especially which usually resulted variety degeneration and virus buildup, and influenced yield and quality of lily.
但采用这些方法，繁殖系数较小，特别是经多代分殖以后，常造成种性退化，甚至病毒积累，影响百合的产量和质量。 - A computer programme is designed for the wave propagation coefficient method, which is used to calculate the propagation coefficient and predict the wave propagating in the bar. As an example, the propagation coefficient of PMMA is calculated.
针对波传播系数的谱分析法进行了程序设计，建立了用于粘弹性杆波传播系数的计算和波形预测的程序，并利用该程序计算了PMMA材料杆中的波传播系数。 - As an important medicine of raw materials, the requirements increase every year, but the reserves greatly reduced for its slow growth and low propagation coefficient. The supply has been gradually difficult to meet production requirements.
重楼作为我国重要中成药的原料，需要量逐年增加，但由于其生长缓慢，繁殖系数低等，蕴藏量大大减少，已逐渐难以满足生产所需。 - Layering had a high rooting rate, but its propagation coefficient was lower and would injure the mother tree, the roots are also underdeveloped.
费约果压条繁殖生根率高，但其繁殖系数较低，对母树树体损伤严重，且根系不发达，生产上一般也不采用。 - Layering is the currently practiced propagation method which has a low propagation coefficient. Cuttings and grafting have low rate of seedling production. The excellent seedlings are in serious shortage in the face of the rapid development of hazelnut industrialization.
榛子目前主要采用压条繁殖，繁殖系数低，扦插、嫁接成苗率低，面对榛子产业化迅速发展的需求，榛子良种优良无性系的苗木较少。 - Potted flower because of its high propagation coefficient, bright colors and variety, has a very important position in the urban landscape applications.
草花因其繁殖系数高、花色鲜艳和品种丰富等特点，在城市园林绿化应用中具有极其重要的地位。 - Currently the reproductive system of hazel was cuttage propagation and mound layering etc. Due to its low propagation coefficient, it unable to meet the market demand for hazelnut seedlings increasingly.
目前榛子主要采用扦插，压条等方式繁殖，由于其繁殖系数低，逐渐不能满足市场对榛子苗的需求。 - Like millet, it have a big propagation coefficient if we can achieve the heterosis through the CHA and cultivated a new breed which had high yield. It will be played a even bigger role and promoted the millet breeding in a new stage.
像谷子这类繁殖系数很大的作物，如能实现化控二系杂种优势利用，进而培育出超高产杂交谷子新品种，将会在生产上发挥更大作用，促使谷子育种进入一个崭新阶段。 - At present, Acer mono Maxim is propagated mainly by seed and stem cutting. However, seed propagation has disadvantage of long cycle period, low propagation coefficient, and prone to mutation.
目前，五角枫主要通过播种或扦插繁殖，对于播种繁殖，其周期长，繁殖系数低，且容易发生变异；而扦插繁殖成活率的技术难题也一直未能突破。