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double plasma
相关语句
  双等离子体
     THE NON-GEOMETRICAL OPTIC SOLUTION FOR THE ALFVEN WAVE IN DOUBLE PLASMA BEAM MODEL
     双等离子体流模型中阿尔芬波的非几何光学近似解
短句来源
     Inhomogeneous Plasmas Produced by Double Plasma Device
     利用双等离子体装置产生非均匀等离子体
短句来源
     We used the smooth pertubation method to treat the problem of Alfven wave propagation in double, plasma system.
     应用平滑扰动法,处理了阿尔芬波在非均匀双等离子体流模型中的传播问题,讨论了两种情况,第一种是:当等离子体流的密度远较背景等离子体稠密;
短句来源
  相似匹配句对
     plasma;
     血浆游离DNA ;
短句来源
     There are double ion potential wells in the plasma.
     在等离子体中沿轴向和径向存在双离子位阱;
短句来源
     DOUBLE DEGENERATE FOUR-WAVE MIXING IN PLASMA
     在等离子体中的二重简并四波混频
短句来源
     double alkanes.
     双链烷技术。
短句来源
     PLASMA ECHO
     等离子体回波
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  double plasma
Two main models are studied for their interpretation: (i) interactions between electrostatic plasma waves and whistlers, (ii) radio emission at double plasma resonance (DPR).
      
All the main properties of the zebra stripes with pulsating superfine structures indicate that the double plasma resonance model might be the most suitable one, with the relaxation oscillations, to form the superfine structures.
      
The zebras and the bursts can be interpreted by the same double plasma resonance process as proposed by Bárta and Karlicky (Astron.
      
It is shown that electrons with a power-law energetic spectrum can effectively excite upper-hybrid waves at double plasma resonance.
      
The loss-cone instability of energetic electrons at double plasma resonance is considered.
      
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Numerous observations have indicated that the fluctuation of magnetic field in the solar wind is provided with the longitudinal component of the field and the waves may also propagate in directions diffrent from the static magnetic field. To explain this phenomenon, a hypothesis of mixed modes with polarization of Alfvenic and slow magnetosonic types had been developed by Dobrowoeny et al with some theoretical difficulties nevertheless.Using the smooth pertubation method we treat the problem of Alfvenic wave...

Numerous observations have indicated that the fluctuation of magnetic field in the solar wind is provided with the longitudinal component of the field and the waves may also propagate in directions diffrent from the static magnetic field. To explain this phenomenon, a hypothesis of mixed modes with polarization of Alfvenic and slow magnetosonic types had been developed by Dobrowoeny et al with some theoretical difficulties nevertheless.Using the smooth pertubation method we treat the problem of Alfvenic wave propagation in double plasma system. We solve the wave equation in the inhomogeneous plasma stream under the condition of axial symmetry. The approximate solution of the first order is obtained. It can be demonstrated that when the stream is inhomogeneous, the self-scattering is to present. Meanwhile the pure Alfvenic waves can propagate in direction diffrent from the static magnetic field and the longitudinal component of the magnetic field fluctuation may exist too. Both values in our approxmation are small but not zero. Thus we show a different machanism to explain the presence of the longitudinal magnetic field in waves in the solar wind.

用平稳扰动法,对双流模型下的不均匀等离子体内的Alfven波,求得了逐级近似解.结果表明,等离子体射流的密度不均匀性,将使波产生自散射现象,这时Alfven波将在偏离于定磁场方向上也有能量传播,并且将有纵向磁场分量产生,因此在解释太阳风中观测到的纵向涨落磁场的产生机制问题上,提出了与Dobrowolny等不同的看法.

In accordance with the experiment results of the tristable phenomena in argon discharge plasma in a double plasma device, the related semiclassical theory based on the fundamental physical processes, such as ionization, recombination, excitation and deexcitation, are established.

本文从粒子间的电离、复合、激发和去激发等基本相互作用出发,解释了实验中观察到的各类三稳现象,并对更为复杂的现象如分岔、混沌等作了讨论。

Glaridacris catostomi Cooper, 1920 is one of the widely distributed tapeworms belonging to Caryophyllidea in North America. Often G. catostomi can be found in the same host with Hunterella nodulosa Mackiewicz & McCrae, 1962 from different parts of the intestine.Materials used for the present paper was obtained from the white sucker Catostomus commersoni (Lacepede) collected from Chain Lakes, Alberta, Canada.1. Microthrix consists of spine, baseplate and shaft. Spine tapering posteriorly is elongated oval shaped...

Glaridacris catostomi Cooper, 1920 is one of the widely distributed tapeworms belonging to Caryophyllidea in North America. Often G. catostomi can be found in the same host with Hunterella nodulosa Mackiewicz & McCrae, 1962 from different parts of the intestine.Materials used for the present paper was obtained from the white sucker Catostomus commersoni (Lacepede) collected from Chain Lakes, Alberta, Canada.1. Microthrix consists of spine, baseplate and shaft. Spine tapering posteriorly is elongated oval shaped and electron dense in cross section. Electron lucent shaft is round or ovate in cross profile. The two parts mentioned above are separated by a baseplate which is electron dense with lamellated substructure. The microthrix is entirely covered by an outer and an inner double plasma membranes. Beneath the inner plasma membrane of the shaft a layer of concentration electron dense matrix and 10—14 microfilamental subunits can be seen in longitudinal section. The microfilamental subunits are connected by septa.2. Structured bodies are produced by the neck cells deeply embedded in the parenchyma of the scolex-neck region of the worm. In cross section the structured bodies have round lucent areas at both ends and faintly lucent "dots". These "dots" are hexagonal subunits arranged regularly in 2 to 5 rows, each row containing 9—16 subunits which are similar to those seen in the rod-shaped bodies in H. nodulosa and C. laticeps (Hayunga & Mackiewicz, 1975; Richards & Arme, 1981). in longitudinal section the structured bodies appear oval form with long unique electron lucent areas on both margins. The structured bodies are filled with distinct striations (hexagonal subunits) underlying the lucent areas. The structured bodies of G. catostomi can be easily distinguished from those of H. nodulosa and C. laticeps and other cestodes by their shapes and also by the presence of unique electron lucent areas.3. Elongated granules produced also by the neck cells are rod-shaped with both ends slightly swollen. The elongated granules are bounded by a cytoplasmic membrane with electron lucent center "dots" in cross sections, but a peripheral stbstructure present in C. laticeps (Richards & Arme, 1981) was not observed. The neck cells are rich in ribosomes, glycogen granules, hpid-like granules, endoplasmic reticulum and Golgi complex. Beneath the membrane of neck cells a peripherally arranged circle of micro(?)ubules is seen both in the extensions and cell bodies.4. Mitochondria are abundant and concentrated in the basal third of the tegumental syncytium, especially near the invagination of the basal plasma membrane of distal cytoplasm. They are oval shaped with only a few cristae. On the other hand, the mitochondria of the cell cytons are much larger and consist of much more cristae which are longer than those found in syncytium.5. Within the tegument of G. catostomi there are two types of sensory receptors observed. One of them is ciliated, the other one is non-ciliated.The form and substructures of both types of sensory receptors in G. catostomi are similar to those of C. laticeps. The only difference between them is the substructure of the rootlet in non-ciliated sensory receptor. The nonciliated sensory receptor in G. catostomi has the roolet formed of 3 electron dense striae. Each stria consists of numerous longitudinal short striae thickening in basal part and tapering upwards. No mitochondria were observed within the ciliated sensory receptor.The characteristics of the ultrastructure of the tegument, organelles and sensory receptors described above may be of taxonomic significance.

作者利用扫描和透射两种电镜详细研究了吸口凿开绦虫(Glaridacris catostomi Cooper,1920)头节体被、细胞器(微毛、结构小体、长形颗粒、线粒体)和神经感受器的超微结构,并将它们与其他绦虫类,尤其是与石竹科Caryophyllidae中的近缘种类的同类细胞器进行了比较。发现绦虫体被细胞器的超微结构具有属的特性。

 
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