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the propagation
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  传播
     On the Propagation of Christian in Border District of Yunnan, Guizhou and Sichuan (1840-1949)
     滇黔川边基督教传播研究(1840-1949)
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     Research in Effects of Terrain on the Propagation of Vortex Rossby Waves and Typhoon Intensity Change
     地形对涡旋Rossby波传播和台风强度变化影响的研究
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     A STUDY OF THE PROPAGATION VELOCITY OF PRESSURE WAVE IN GAS-LIQUID TWO PHASE MIXTURES
     气、液两相介质中压力波传播速度的研究
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     The propagation formula of gaussian beams in the optical system and its applications
     高斯光束通过光学系统的传播公式及其应用
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     The Propagation Characteristic of Oblique Incident Plane Electromagnetic Waves through Re-entry Plasma Sheath Layer
     再入等离子体鞘层中斜入射平面电磁波的传播特性
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  在传播
     Discussion on the Effect of Correlation Coefficient and Graphic Correlation Result on the Propagation Model Calibration
     相关系数和相关性图例在传播模型校正中的作用探讨
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     During the propagation of the sound wave, the audio signal is regenerated by self-demodulation due to the nonlinearity of air.
     由于空气的非线性声学效应,在传播过程中声波中的音频信号会自解调出来,可以被人耳直接听到。
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     The propagation of seismic waves is complex and various wave modes exist simultaneously.
     地震波的传播是复杂的,各种波型是同时存在而且相互转换的,该反射系数谱考虑了各种波型在传播过程中的相互转换以及多次波。
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     The gravity wave is trapped by Dabie Shan Mountainin the process of propagation and the edge front is formed at the east side of Dabie Shan Moun-tain. The propagation of edge front shows the feature similar to Kelvin wave. The character oflarge amplitude gravity wave in the boundary layer is very obvious.
     重力波在传播过程中于大别山东侧形成边缘锋,边缘锋的传播更类似于沿岸 Kelvin 波,大振幅重力波在边界层特征更明显。
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     The total wave field simulation is realized by this method for the wave pattern conversion and the wave form change in the propagation of the seismic wave.
     实现了在微机上用有限差分法对地震波在传播过程中的波型转换及波形变化的全波场模拟
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  场传播
     3-D Complex Ray Theory for Analyzing the Propagation of Evanescent Waves
     分析凋落波场传播的三维复射线理论
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     The FDTD numerical calculation method is used to simulate the propagation of the wave emitted from a power source inside a metamaterial cylinder which is composed of the ROD and SRR array. The characteristic of the inward waves in the metamaterial is conformed by the simulation results.
     同时采用FDTD数值模拟方法,基于ROD和SRR阵列结构,模拟了位于微波左手材料中源的辐射场传播,形象直观地验证了左手材料的内向波特性。
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     A fast simplified algorithm for generating three component seis- mogram is developed after simple analysis and some simplification of the propagation of multi-component wave field in layered medium model.
     对层状介质模型中的多分量波场传播进行简单分析及某些简化后,提出了三分量记录合成的快速近似算法。
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     The problem for the heat diffusion and the propagation of wave field is generally reduced to solve a class of 2D or 3D convolution integral equation. It has significant value in science and application to solve this problem. The problem in 1D case has been solved in reference [1].
     对于热扩散问题和波场传播问题常常归结为二维或三维卷积型积分方程的求解.文献[1]解决了该类问题的一维求解,本文在二维情形下解决了指数衰减卷积型积分方程的求解,得到了求解的迭代格式,具有直接的应用价值.
短句来源
     Then we discuss two approaches to migrate narrow azimuth seismic data, in which one has restriction to the input dataset, the other has limitation to the propagation direction of the seismic waves.
     针对地震勘探中窄方位三维地震数据成像问题,探讨了限定输入数据体或限定波场传播方向的DSR方程偏移方法.
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  “the propagation”译为未确定词的双语例句
     Study on the Propagation Properties and Beam Control of High-power Lasers with Distortions
     高功率畸变激光的传输特性和光束控制研究
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     Study on the Propagation Properties of Chirped Pulse with High Power and Energy
     大能量高功率啁啾脉冲传输特性研究
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     Study on the Propagation Properties and Anomalous Spectral Behavior of Ultrashort Pulsed Beams
     超短脉冲光束的传输特性和光谱异常行为的研究
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     On the Propagation Speed of Wave Disturbanes in the Westerlies
     西风带波扰的移行速度
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     ON THE PROPAGATION OF PLASMODIUM VIVAX IN A MACAQUE-MACACA ASSAMENSIS
     间日疟原虫(PLASMODIUM VIVAX)在熊猴(MACACA ASSAMENSIS)体内的繁殖
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  the propagation
The propagation of drought-resistant transgenic poplars is one of the more effective ways to improve the ecological state of arid regions.
      
It is important to analyze the propagation characteristics of guided waves in acoustic leak location in pipelines.
      
Photonic crystal, a novel and artificial photonic material with periodic dielectric distribution, possesses photonic bandgap and can control the propagation states of photons.
      
The recent progresses on the propagation, generation and application of partially coherent beam (PCB) are reviewed in this paper.
      
A new tensor ABCD law for treating the propagation of partially coherent Gaussian-Schell model (GSM) beams through a paraxial optical system is derived.
      
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Sugar cane borers infest the cane and cause a considerable injury to the plant in China. Four species of sugar-cane borers are commonly found in Kwangtung Province, viz. Diatraea venosata Wk., Chilo infuscatellus Snellen, Eucosma schistaceana Snellen and Sesamia inferens Wk.Trichogramma evanescens Westw. occurs in nature as an egg parasite of the sugar-cane borers.The present experiment on breeding Trichogramma centres around the ways of increasing its viability.The quality and the quantity of the nutrient for...

Sugar cane borers infest the cane and cause a considerable injury to the plant in China. Four species of sugar-cane borers are commonly found in Kwangtung Province, viz. Diatraea venosata Wk., Chilo infuscatellus Snellen, Eucosma schistaceana Snellen and Sesamia inferens Wk.Trichogramma evanescens Westw. occurs in nature as an egg parasite of the sugar-cane borers.The present experiment on breeding Trichogramma centres around the ways of increasing its viability.The quality and the quantity of the nutrient for the larvae and adults of Trichogramma play an important role in relation to their viability. The contents of the egg of Sitotroga cerealella Oliv. which has been commonly used as a host of the Trichogramma are of poor nutrient quality and quantity for the larvae of this parasite. The eggs of Angoumois grain moth are so small that only one adult Trichogramma emerges from each egg. Such adults are usually smaller in size, less active and with lower reproductive potentiality as compared with those that emerge from the field hosts; besides, the female sex ratio gradually decreases in the successive generations.From the results of an experiment on Trichogramma breeding, it is found that the eggs of Attacus cynthia ricini Boisd. and of Dendrolimus sp. are the most suitable hosts for the propagation of Trichogramma evanescens. The adults of the parasites emerging from such eggs are generally large in size, very active and possess high reproductive potentiality; besides, the female sex ratio remains unchanged in the successive generations. Evidently, the quality and the quantity of the egg contents of these two species of insects fulfil the nutritional requirements for the development of the Trichogramma larvae and they are recommended as hosts for Trichogramma propagationThe average number of adult Trichogramma emerging from a single egg of Dendrolimus sp. and that of Attacus cynthia ricini is 27.3 and 28 respectively with the respective maximum reaching 52 and 59 in the present record. If too many adults emerge from a single egg, both their size and reproductive potentiality would decrease and, moreover, the number of the male individuals would increase and the adult life would shorten. Undoubtedly, all these features are unfavourable for the utilization of the parasites for control of the insect pest as far as the effectiveness of the parasites is concerned. From the standpoint of increasing viability of the parasite, regulation of the number of parasites in the egg during the procedure of propagation of Trichogramma is necessary. Regulation of the number of parasites in the egg means regulation of the quantity of the nutrient for the parasites. The method of checking the occurrence of superparasitism is to regulate the ratio of the number of female Trichogramma and host eggs to 1:1 through the procedure of propagation; the period of oviposition should not exceed one day.The quality of nutrient for adult Trichogramma greatly affects its longivity and reproductive potentiality. The result of a nutritional experiment shows that honey is the most suitable nutrient for it. The adults fed with honey have the longivity increased 8.6 times and the number of the offspring 14.7 times as compared with those fed with distilled water.Cold storage effectively reduces the speed of development of the immature stage of Trichogramma. The mature larvae about to pupate within the host eggs maintain their life for 57 days under 4—7℃ and all of them will come out as adults at room tempeature. The fresh eggs of Dendrolimus sp. and of Attacus cynthia ricini kept in cold storage of 0— 4℃ for 97 days and 61 days respectively are still usable for rearing Trichogramma.In order to increase the adaptability of Trichogramma to the environment of the sugarcane field, the rearing procedure is suggested to proceed in the field or in an indoor environment with fluctuating temperature and humidity. The continuous artificial rearing should not exceed five generations before the liberation of the parasites.The distance of dispersion of Trichogramma eva

甘蔗是我国最重要的糖料作物,甘蔗害虫以甘蔗螟虫最普遍,分怖亦最廣。廣东珠江三角洲常见的甘蔗螟虫共有四种:条螟或称斑点螟(Diatraea venosata Wk.)、二点螟(Chilo infuscatellus Snellen)、黄螟(Eucosma schistaceana Snellen)和大螟(Sesamiainferens Wk.)。甘蔗螟虫为害的结果,形成枯心苗和蛀(?),影响甘蔗生长发育,减低蔗糖成份,易受风折,而且造成甘蔗赤腐病菌入侵条件。 甘蔗螟虫的为害虽重,但目前还没有一套完整的防治方法,也还没有一种很有效的方法。本试验目的,是利用赤眼蜂来防治甘蔗螟虫。试验内容是赤眼蜂的寄主的选择和繁殖、赤眼蜂的繁殖及保存、赤眼蜂田间放播初步试验和甘蔗螟虫田间发生情况的调查。现将各项试验结果简要地分述如下: 赤眼蜂能否利用成功,要看培育出来的赤眼蜂是否具有高度的生活力。赤眼蜂的生活力可用下列四个标准去量度:(1)蜂体大小,(2)繁殖能力,(3)成虫寿命,(4)对田间环境的適应性。此外,繁殖出来的赤眼蜂雌性此率不应此自然界的减低。 赤眼蜂的生活力,首先和寄主有很大关系。如果寄主卵的内含物的质和量都適合 於赤...

甘蔗是我国最重要的糖料作物,甘蔗害虫以甘蔗螟虫最普遍,分怖亦最廣。廣东珠江三角洲常见的甘蔗螟虫共有四种:条螟或称斑点螟(Diatraea venosata Wk.)、二点螟(Chilo infuscatellus Snellen)、黄螟(Eucosma schistaceana Snellen)和大螟(Sesamiainferens Wk.)。甘蔗螟虫为害的结果,形成枯心苗和蛀(?),影响甘蔗生长发育,减低蔗糖成份,易受风折,而且造成甘蔗赤腐病菌入侵条件。 甘蔗螟虫的为害虽重,但目前还没有一套完整的防治方法,也还没有一种很有效的方法。本试验目的,是利用赤眼蜂来防治甘蔗螟虫。试验内容是赤眼蜂的寄主的选择和繁殖、赤眼蜂的繁殖及保存、赤眼蜂田间放播初步试验和甘蔗螟虫田间发生情况的调查。现将各项试验结果简要地分述如下: 赤眼蜂能否利用成功,要看培育出来的赤眼蜂是否具有高度的生活力。赤眼蜂的生活力可用下列四个标准去量度:(1)蜂体大小,(2)繁殖能力,(3)成虫寿命,(4)对田间环境的適应性。此外,繁殖出来的赤眼蜂雌性此率不应此自然界的减低。 赤眼蜂的生活力,首先和寄主有很大关系。如果寄主卵的内含物的质和量都適合 於赤眼蜂幼虫营养之需,羽化出来的成虫体积大,繁殖力强,寿命也有延长的趣势。关於赤眼蜂的寄主,我们管用过17种鳞翅目昆虫的卵供其寄生,结果以松毛虫(Dendro

By combining the equation of motion of a magneto-elastically coupled system derived from a classical hamiltonian and the Maxwell equations with the propagation factor neglected, we obtained a differential equation which determines the magnetic oscillations accompanying elastic vibrations of a ferrite specimen of the usual size for magnetic resonance experiments. To each normal mode of elastic vibration of the specimen there exists an associated magnetic oscillation (namely, a magneto-acoustic mode). We...

By combining the equation of motion of a magneto-elastically coupled system derived from a classical hamiltonian and the Maxwell equations with the propagation factor neglected, we obtained a differential equation which determines the magnetic oscillations accompanying elastic vibrations of a ferrite specimen of the usual size for magnetic resonance experiments. To each normal mode of elastic vibration of the specimen there exists an associated magnetic oscillation (namely, a magneto-acoustic mode). We pointed out that the magneto-acoustic resonance phenomenon discovered by Spencer and Le Craw is a special case of the parametric oscillation involving a magnetoacoustic and a magnetostatic mode. The arrangements for observing the oscillation involving a certain magnetostatic mode and magnetoacoustic modes and the theoretical estimate of the threshold pumping power were discussed.

在本文中,我们从磁-弹性耦合的宏观表达式,通过经典场论的方法,求得弹性振动和磁振璗的耦合方程,用来分析了伴随波长约等于铁氧体样品的线度的声振动而存在的磁振璗(磁声模)。文中指出,Spencer和LeCraw所发现的磁声效应是磁声模和静磁模在注入场的激发下产生的参量振璗现象(也可以说是热声子的电磁讯号的放大)。我们引用Berk等人在讨论一种半静磁操作放大器的文章中给出的公式,算出Spencer-LeCraw实验所需要的功率,其结果与记录的数据相接近。我们提出了使任一静磁模配合磁声模产生振璗的调谐条件以及降低激发功率和观测几十到几百兆赫的声频的办法。通过磁声模和静磁模的交变场向量的空间对称性的分析,我们推导出磁声参量振璗的选择定则:对于球体三个主要弹性振动模(旋转模、向径模和椭球模),(1)静磁模(n,m,r)的Walker指标n是偶数者不产生磁声效应;(2)指标m是奇数者不与旋转模产生磁声效应,m是偶数者不与向径模或椭球模产生磁声效应。我们也举出第一类本征振动中有只可能和n是偶数、m是奇数的静磁模产生参量振璗的例子。Spencer-LeCraw局限于使静磁场调谐在(110)模上,所观察到的现象仅仅是本文所给出理...

在本文中,我们从磁-弹性耦合的宏观表达式,通过经典场论的方法,求得弹性振动和磁振璗的耦合方程,用来分析了伴随波长约等于铁氧体样品的线度的声振动而存在的磁振璗(磁声模)。文中指出,Spencer和LeCraw所发现的磁声效应是磁声模和静磁模在注入场的激发下产生的参量振璗现象(也可以说是热声子的电磁讯号的放大)。我们引用Berk等人在讨论一种半静磁操作放大器的文章中给出的公式,算出Spencer-LeCraw实验所需要的功率,其结果与记录的数据相接近。我们提出了使任一静磁模配合磁声模产生振璗的调谐条件以及降低激发功率和观测几十到几百兆赫的声频的办法。通过磁声模和静磁模的交变场向量的空间对称性的分析,我们推导出磁声参量振璗的选择定则:对于球体三个主要弹性振动模(旋转模、向径模和椭球模),(1)静磁模(n,m,r)的Walker指标n是偶数者不产生磁声效应;(2)指标m是奇数者不与旋转模产生磁声效应,m是偶数者不与向径模或椭球模产生磁声效应。我们也举出第一类本征振动中有只可能和n是偶数、m是奇数的静磁模产生参量振璗的例子。Spencer-LeCraw局限于使静磁场调谐在(110)模上,所观察到的现象仅仅是本文所给出理论预见的一个特殊情况。他们发现了椭球模和向径模的频率显著地出现,但并无旋转模的频率,这是上述的?

In this paper, The propagation of small disturbance in Electrohydrodynamics is studied by means of single fluid theory. There exist two fundamental modes: Electrohydrodynamic wave and Electro-acoustic wave. The phase velocity of the former depends upon the phase velocity of space charge wave while the phase velocity of the later depends upon the velocity of sound. If the above results are compared with Magneto-hydrodynamic wave and Magneto-acoustic wave, the similiarity betweem them is evident.

本文用单流体模型研究了小扰动在电流体中的传播,得出了两种基本波型:电流体力学波与电声波,前者相速依赖于空间电荷波的相速,而后者相速则依赖于声速。上述结果如与磁流体中的磁流体力学波与磁声波相比较,它们之间的相似性十分明显。

 
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