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rapid propagation
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  快速繁殖
     The experiment result shows that MS + 6 + BA1 . 0mg/L + NAA0 . 5 mg/L is suitable medium for the rapid propagation .
     实验表明矮牵牛快速繁殖诱导分化培养基为Ms+6-BA1.0mg/L+NAA0.5mg/L。
短句来源
     The suitable media for rapid propagation of Aloe arborescens Mill are as follows:MS+BA 2 5 mg/L+NAA 0 2~0 3 mg/L for bud induction; 1/2MS+NAA 2 0 mg/L+AC 2~3 g/L for rooting and 1/2MS+IBA 2 0 mg/L for shoot strengthening.
     单杆芦荟离体快速繁殖 ,芽增殖培养基以MS +BA 2 5mg/L +NAA 0 2~ 0 3mg/L ,生根培养基以 1/ 2MS +NAA 2 0mg/L +活性炭 0 2 %~ 0 3% ,壮苗培养基以 1/ 2MS +IBA 2 0mg/L为好。
短句来源
     The experiment results showed that the optimum medium of inducing bud was MS+6-BA3mg/ L+NAA0. 1mg/L,MS+6-BA 1mg/L+NAA0. 2mg/L was the optimum medium during rapid propagation,and the optimum medium of rooting was 1/2MS+IBA2. 0mg/L. 2~6 roots can be generated within 16~28 days.
     实验结果表明,诱导芽的生成,使用 MS+6-BA3mg/L+NAA0. 1mg/L 培养基为最佳,快速繁殖阶段使用 MS+6- BA1mg/L+NAA0. 2mg/L 培养基为最佳,诱导生根阶段使用1/2MS+IBA2. 0mg/L 培养基为最佳,16~28d内可以长出2~6条 根。
短句来源
     Study on Rapid Propagation of Gerbera (Gerbera jamesonii Bolus) in Vitro
     非洲菊(Gerbera jamesonii Bolus)离体快速繁殖体系的研究
短句来源
     Taking leaves and stems as explants, the effects of 2,4-D, NAA, 6-BA and CPPU on rapid propagation of Rabdosia lophanthoides were studied.
     以线纹香茶菜叶切片、茎切段为外植体,研究2,4-D、NAA、6-BA、CPPU对其快速繁殖的影响。
短句来源
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  快繁
     In rapid propagation of the polyploid plantlets,the optimum multiplication medium was MS+BA 1.0 mg/L+NAA 0.1 mg/L,the coefficient of multiplication being 1.5,and the optimum rooting medium was 1/2MS+IAA 0.2 mg/L,the rooting rate being 100%.
     对多倍体植株进行组织快繁,最佳增殖培养基为MS+BA 1.0 mg/L+NAA 0.1 mg/L,增殖倍数达到1.5,生根培养基1/2 MS+IAA 0.2 mg/L,生根率为100%。
短句来源
     The better medium for inducing and differentiating of callus was MS + 0.2mg·L~(-1) NAA + 2.0 mg·L~(-1) 6-BA, and the suitable medium for growth and rapid propagation was MS+0.5 mg·L~(-1) NAA+0.1 mg·L~(-1) PP_(333).
     适于茎尖愈伤组织形成和分化的培养基为MS+0.2mg·L-1NAA+2.0mg·L-16 BA; 适于壮苗快繁的培养基为MS+0.5mg·L-1NAA+0.1mg·L-1PP333。
短句来源
     The results of study on the rapid propagation in vitro of Begonia rieger suggested that the appropriate culture media for inducing bud differentiation from leaves was MS+6-BA0.50 mg/L+NAA1.00 mg/L;
     组培快繁技术研究结果表明:适宜丽格海棠叶片诱导芽分化的培养基为MS+6 BA0 50mg/L+NAA1 00mg/L;
短句来源
     This paper studied the rapid propagation method of Opuntia vilpa alta Haw in plant tissue culture,We got the results: explants of differentiation rate to 77.3% with medium MS 6-BA 3.0mg/L&NAA 0.1 mg/L in bud induction;
     探索了米邦塔食用仙人掌组培快繁技术,得出不定芽诱导使用培养基MS+6-BA 3.0mg/L+NAA 0.1mg/L,外植体分化率达77.3%;
短句来源
     Effect of Different Concentration of La(NO_3)_3 on Stem Rapid Propagation of Cerasus mahaleb
     La(NO_3)_3对马哈利樱桃组培苗快繁的影响
短句来源
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  “rapid propagation”译为未确定词的双语例句
     (2)MS+KT5.0 mg/L for rapid propagation.
     (2 )增殖 MS+KT5 .0 mg/ L;
短句来源
     Rapid propagation medium was MS+NAA0.1mg/L +BA0.1 mg/L.
     在MS+NAA0.1mg/L+BA0.1 mg/L的培养基上能够获得茎芽快速增殖;
短句来源
     (2)MS+BA1.0 mg/L+IBA0.5 mg/L for rapid propagation.
     愈伤组织在(2)MS+BA1.0mg/L+IBA0.5mg/L的培养基上诱导丛生芽及进行继代增殖培养,效果较好;
短句来源
     (2)Ms+BA 1.0 mg/L+IBA 0.5 mg/L for rapid propagation.
     愈伤组织在(2)Ms+BA 1.0 mg/L+IBA 0.5 mg/L的培养基上诱导丛生芽及进行继代增殖培养,效果较好;
短句来源
     The result shows that MS+6-BA 1.0~2.0 mg/l+NAA 0.01~1.0 mg/l is suitable medium for the rapid propagation .
     实验表明橡皮树快速繁殖的适宜培养基为MS+6-BA1.0~2.0mg/l+NAA0.01~1.0mg/l。
短句来源
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  rapid propagation
High-cycle fatigue (HCF), involving the premature initiation and/or rapid propagation of cracks to failure due to high-frequency cyclic loading, remains a principal cause of failures in gas-turbine propulsion systems.
      
The results of x-ray studies of structural defectiveness in electric-contact sintering, too, point to rapid propagation of diffusional relaxation processes, in which the elastic energy of dislocations acts as the driving force.
      
Rapid propagation of cracks in orthotropic materials
      
After ignition, a considerable increase of brightness was observed, due to the extremely rapid propagation of the high-temperature reaction to the whole mass of powder.
      
Both mechanisms involve the rapid propagation of cracks over distances of 10-100 μm and the resulting emission is consistent with the model predictions.
      
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On basis of fracture-mechanics the catastrophic rapid propagation of cracks in termsof stress concentration and energy balance conditions and the slow crack propagation interms of stress corrosion or other mechnisms have been described. This concept has alreadyfound practical applications in the study of the conditions of crack propagations, bothslow and fast, on quantitative basis and as functions of composition, structure,temperatu-re and chemical environment. Fracture studies are dealt with both...

On basis of fracture-mechanics the catastrophic rapid propagation of cracks in termsof stress concentration and energy balance conditions and the slow crack propagation interms of stress corrosion or other mechnisms have been described. This concept has alreadyfound practical applications in the study of the conditions of crack propagations, bothslow and fast, on quantitative basis and as functions of composition, structure,temperatu-re and chemical environment. Fracture studies are dealt with both in the light of crack initiation in some of the ma-terials and plastic effects at crack tips.This paper is an attempt to provide from thestate of art knowledge of fractures a rational and quantitative interpretation of crack be-havior of brittle ceramics.Stress has been laid both on the fundamental concepts and onsome of the most important illustrations with the hope to help development of reaserch onpolycrystalline ceramics.

从断裂力学的观点出发,论述了裂纹快速扩展的应力集中和能量平衡条件,并对应力腐蚀或其它机理引起的裂纹慢速扩展加以解释。这一概念目前已得到实际应用。特别是裂纹的慢速和快速扩展条件已在定量测定的基础上作为组分、结构、温度和化学环境的函数加以研究。断裂研究不仅涉及材料中裂纹的起源亦涉及裂纹尖端的塑性区效应。 本文运用目前有关断裂方面的知识,对脆性陶瓷的裂纹行为作定量的科学解释。特别着重于最基本的概念和最重要的实例,以期有助于多晶陶瓷材料研究工作的开展。

The dynamic properties of the unstable (fast) propagation of cracks, especially the rule of the variation of propagating velocity, are discussed. The case to be considered is that the extension of cracks is not very long (as the cases of rapid crack propagation under impulsive load) , the main idea of this paper is that the rapid propagation of cracks may be treated as a vibration problem and is connected to the basic conceptions of fracture mechanics (such as criterior of fracture, etc.) by the principle...

The dynamic properties of the unstable (fast) propagation of cracks, especially the rule of the variation of propagating velocity, are discussed. The case to be considered is that the extension of cracks is not very long (as the cases of rapid crack propagation under impulsive load) , the main idea of this paper is that the rapid propagation of cracks may be treated as a vibration problem and is connected to the basic conceptions of fracture mechanics (such as criterior of fracture, etc.) by the principle of energy equivalence. The rapid propagation of cracks is essentially a specific type of the transient vibration of elastic bodies, with the boundary conditions varying with the time. Under the assumption of equivalence, the above problem may be treated as the initial-value problem of a damped system with multiple degrees of freedom, considering the nonlinear effect of stiffness due to the extension of crack. After further simplification, it is deduced to a transient response problem of a damped nonlinear system of single degree of freedom under the initial condition of displacement, so that the solution can be obtained numerically. The fundamental conceptions for which the model is constituted, is the principle of the whole amount of energies being equivalent between the model and practical element, and the primary (main) hypothesis is that the fracture energy dissipated during the propagation oi crack is equivalent to the damping energy of the model system. The DCB specimens are taken as an example for explaining the theory and computing procedure. Numerical examples are calculated and compared with experimental results.In order to record the complete procedure of the rapid propagation and arrest of the crack by experiments, a new method of eddy-current type is developed.Computational results of several specimens of different materials are all coincided well with the experiments. So it can be concluded that the computational model can be used at least for such cases. Further research would be studied for more compli cate cases.

本文研究裂纹快速扩展的动力特性,特别是裂纹扩展速度的规律.主要考虑在裂纹扩展量不很大的情况(如冲击载荷下裂纹快速扩展的情况)下,将裂纹快速扩展-止裂过程作为一种瞬态振动问题求解,而通过能量相当(等效)的原则与断裂力学基本概念(断裂准则等)相联系.计算模型的主要假设是:在裂纹快速扩展过程中,断裂能的消耗用等效的阻尼能来表达.经过近似处理,最后归结为求解有阻尼的单自由度非线性系统在初位移下的瞬态响应计算问题.以DCB试件为例说明计算程序,并给出实例计算结果与实验结果和其他工作的比较.用涡流检测法记录裂纹快速扩展的全过程,以提供实验数据。计算结果与各种实验结果符合较好,初步证明所用的计算模型的有效性,可以作进一步的推广研究以及用于更复杂的问题.

The initiation, propagation and rupture process of hydrogen induced cracks in high strength steel testing implant were studied by using acoustic emission. It was found that the initial position of delayed cracking in testing implant with circular notch is regular. According to the wave form of acoustic emission, the process is divided into four stages: initiation, delayed crack propagation, rapid propagation and instantaneous rupture. The corresponding areas of these stages can be recognized on the fracture....

The initiation, propagation and rupture process of hydrogen induced cracks in high strength steel testing implant were studied by using acoustic emission. It was found that the initial position of delayed cracking in testing implant with circular notch is regular. According to the wave form of acoustic emission, the process is divided into four stages: initiation, delayed crack propagation, rapid propagation and instantaneous rupture. The corresponding areas of these stages can be recognized on the fracture. The corresponding relationships between the stages and areas depend on stress, hydrogen and metallographic structure. Besides, the effects of hydrogen content, structure and properties of HAZ on the microappearance of fracture have also been searched.

用声发射法对高强钢插销试件的氢致裂纹的启裂,扩展以及断裂过程进行了试验研究。发现在环形缺口的插销试件中延迟裂纹的启裂位置是有规律性的,根据A.E波形可将整个过程划分为启裂、延迟扩展、快速扩展、瞬时断裂四个时期,在断口上也可看到相应的分区,二者之间的对应关系取决于应力、氢.组织诸条件。 此外,还探讨了含氢量、H AZ组织与性能对断口微观形貌的影响。

 
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