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在波动
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  in wave
     Several Clever Uses of Loudspeaker in Wave Motion Experiment
     扬声器在波动实验中的几点妙用
短句来源
     It concludes the application method of helical spring parameters and the simulation method of high frequency response of suspension in wave theory.
     提出了在波动理论下弹簧多参数的应用方法及悬架高频响应的模拟方法。 并以螺旋弹簧悬架为代表,对车辆振动的时域响应进行分析。
短句来源
     In wave equation migration, computation method is the key to good data pro-cessing effect l and in a given computation method,the very essential point is whatdifference equation we introduce to replace the partial differential equation.
     在波动方程偏移方法中,采用何种计算方法是提高地震资料处理效果的关键,而在计算方法中使用何种差分方程取代偏微分方程则是问题的核心。
短句来源
     There is usually the problem of halfwave loss when light waves are reflected at the interface of two media in wave optics. However, many textbooks fail to explain the reasons and conditions of halfwave loss.
     在波动光学中常常会遇到光波场在2种介质分界面上反射时的半波损失问题,而大多数教科书并未能从理论上阐明半波损失产生的条件和原因。
短句来源
     It is concluded with the application method of helical spring parameters and the simulation method of high frequency response of suspension in wave theory.
     提出了在波动理论下螺旋弹簧多参数的应用方法及悬架高频响应的模拟方法。
短句来源
  in fluctuation
     In the first part the author analyzed mainly the tendencies and the charateristics of the development of farmers' income since the execution of the reform and open policy ,and the author argued that: the farmers' income inceases in fluctuation, it appears the increase of the stage nature, the increase of the proportion of the currency income, and the increase of rewards of rural households.
     第一节,主要分析改革开放以来农民收入变动趋势和特征,认为农民收入是在波动中增长,呈现出增长的阶段性、货币性收入所占比重提高、从家庭经营中获得报酬增加等特征。 第二节,对农民与城市居民的收入和消费进行对比,得出农民的收入和消费低于城市居民的水平的结论。
短句来源
     Since 1985,the residents' income difference between town and country shows an enlarging trend in fluctuation in China.
     1985年以来,我国城乡居民收入差别在波动中呈扩大趋势。
短句来源
     Since 1985,the residents' income difference between urban and rural households has shown an enlarging trend in fluctuation in China.
     1985年以来,我国城乡居民收入差别在波动中呈扩大趋势。
短句来源
     In the historical period,the frequency of locust disasters in Guanzhong region fluctuated obvious,and showed increase tendency in fluctuation.
     历史时期关中地区蝗灾的发生频率具有明显的波动性,且随着历史的发展,有在波动中上升的趋势。
短句来源
     It has been pointed out that, over the last forty years, the mean annual temperature in Ningxia was continuous rising in fluctuation, with a rising range higher than the mean range of the whole country, that it has reached a 2.4 degree’s rising range in the central arid strip part and north Yinchuan in winter, and the deepest frozen earth depth was obviously shallowing;
     指出,40多年来宁夏的年平均气温在波动中持续上升,增温幅度高于全国平均值,中部干旱带和银川以北冬季的增温幅度达到了2.4度,最大冻土深度明显变浅;
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  “在波动”译为未确定词的双语例句
     Application of Rotation Transform and Viterbi Algorithm in Prestack Depth Migration Preprocessing of Wave Equation
     旋转变换和viterbi算法在波动方程叠前深度偏移预处理中的应用
短句来源
     This conclusion is proved in the volatility spillover effect model.
     这一结论在波动溢出效应模型中也得到了验证。
短句来源
     The following points are revealed from analyzing the δ~180 records of Chongce ice core,Tibetan Platea:the temperature in the studied region gradually rose for 90 years in the 20th century,which is divided into three periods:the gradually rising stage form 1903 to 1940、descending stage form 1941 to 1970 and rising stage form 1971 to 1992.In the first period the fluctuation was great,in the second period calm,in the third period the greatest.
     青藏高原崇测冰芯中稳定氧同位素(δ180)记录表明:20世纪90年中该地区的气温在波动中呈上升趋势,可分为三个时期:1903~1940年为逐渐上升时期、1941~1970年为下降时期、1971~1992年为上升时期,第一时期波动较大,第二时期较平稳,第三时期波动最大;
短句来源
     The results shown as follows:(1) The total amount of NPP of cultivated land in Yuyang district generally increased during 1984~2003.Its total amount has grown from(21.94)×10~4 t/a in 1984 to 57.98×10~4 t/a in 2003.The annual increasing rate was 5.24%.
     研究表明:(1)1984~2003年间,榆阳区耕地净第一性生产力总量在波动中上升,20 a内总物质量从21.94×104t/a增加到57.98×104t/a,年度递增率为5.24%。
短句来源
     this was coupled with the changes in precipitation and temperature. In the past18years,the terrestrial NPP in the Plateau increased from0.19PgC·a -1 in1982to0.24PgC·a -1 in1999,with an annual average increasing rate of about 1%.
     18年来,青藏高原植被的NPP在波动中呈上升趋势,从1982年的0.19PgC增加到1999年的0.24PgC,年平均增加速率约为1%;
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  in wave
The disturbances are assumed to be of the long-wave type, and the analysis involves expansion in wave numbers and is limited by two approximations.
      
Soundproofing in wave guides has been considered in a number of papers, a fairly complete review of which is given in [1].
      
A special role in wave processes is played by nonlinear localized signals-solitary waves or solitons.
      
Regions of electron cyclotron resonance are considered, which play a key role in wave-electron coupling.
      
The characteristic equations in wave numbers of these modes are obtained for symmetric and antisymmetric modes of vibration.
      
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  in fluctuation
Experiments reveal a decrease in the axial component of averaged velocity of particles and a significant increase in fluctuation velocities of particles during their motion in a pipe with dimples.
      
Known solutions of problems in fluctuation electrodynamics are used to derive an expression for the rate of energy dissipation of the thermal electromagnetic field of the half space at the apex of a tunneling microscope tip.
      
For the samples irradiated by arsenic ions, the increase in fluctuation is much larger (0.096 V) than that for the electron-irradiated samples (0.06 V).
      
Differences in fluctuation patterns exist between PCIm and PCIw in residues 2-4 (the N-terminal tail), 13-17, 22-23, 28-81 (the secondary contact site with CPA), and 37-38 (the C-terminal tail); the latter region is rigidified in PCIm.
      
Complete determination of direct reaction amplitude in fluctuation experiment with polarized beam
      
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In the classic solution of wave equation, it is required that the initial and boundary conditions should be smooth enough and any discontinuities are not allowed in medium coefficients. But for seismic exploration, it is often needed to take different medium coeffieients in different areas and in each area, the coefficient must be a constant. There are no classic solutions in such problems. For this reason, the concept of SOLUTION should be extended somehow. Relatively to the classic solution, the extended solution...

In the classic solution of wave equation, it is required that the initial and boundary conditions should be smooth enough and any discontinuities are not allowed in medium coefficients. But for seismic exploration, it is often needed to take different medium coeffieients in different areas and in each area, the coefficient must be a constant. There are no classic solutions in such problems. For this reason, the concept of SOLUTION should be extended somehow. Relatively to the classic solution, the extended solution is called "The Generalized Solution of the Defining Problem".

在波动方程的经典解法中,初始条件与边界条件都要充分光滑,介质系数也不能出现间断.但是在地震勘探中常需考虑介质系数在区域的不同部分为分块常数的情况,这就导致了具间断系数的波动方程的研究,这类问题是没有经典解的.为此,必须把解的概念加以拓广.相对于经典解来说,这种拓广了的解称为定解问题的广义解.本文遵循偏微分方程的泛函方法关于弱解的定义,定义波动方程混合问题的弱解(弱解也是一种广义解),并直接由弱解引进有限元法.本文最后把一个二阶常微分方程组的柯西问题化为一个Volterra积分方程组,并用迭代法求解.

In finite difference migration,we must solve for the root,whose absolute value is less than 1,of deconvolution operator of every trace in each layer,to which difference operation is applied,by solving an one-variable equation of second order.This paper recommends single valued iteration method for solving the root.Used in solving for the root of difference deconvolution operator,this method can not only speed up computing but also guarantee the accuracy of finite difference migration.

在波动方程有限差分偏移中,对每一个差分层的每一个地震道都需通过解一个一元二次方程求取一个绝对值小于1的反褶积算子的根。本文介绍一种一点迭代求根法,用这种方法计算差分反褶积算子的根,不仅提高了计算速度,而且还能保证波动方程有限差分偏移的精度。

ine genototoxierty of tetrametnm has oeen studica by means of UDS assay to measure its DNA-damaging ability in FL line of human amnion cells, and plate incorporation assay and fluctuation test to estmate its mutagenicity in S. typhimurium. Whether S9 mix is added or not, the tetramethrin (5×10~(-2)~5×10~0μg/ml) has been proved to be able to induce UDS in EL cells with a dose-response effect found. In the plate incorporation assay, no mutagenic activity can be found in S. typhimurium strains of TA100, TA98 and...

ine genototoxierty of tetrametnm has oeen studica by means of UDS assay to measure its DNA-damaging ability in FL line of human amnion cells, and plate incorporation assay and fluctuation test to estmate its mutagenicity in S. typhimurium. Whether S9 mix is added or not, the tetramethrin (5×10~(-2)~5×10~0μg/ml) has been proved to be able to induce UDS in EL cells with a dose-response effect found. In the plate incorporation assay, no mutagenic activity can be found in S. typhimurium strains of TA100, TA98 and TA97 exposed to tetramethrin (5, 50 and 500 μg/plate) without S9 mix. However, in the presence of 59 mix, tetramethrin (500μg/plate) induces His~+ revertants of S. typhimurium TA100 and TA98, nearly double that of the control. While, in the fluctuation test, irrespective of the adding of S9 mix, the number of tubes positive of TA97 induced by tetramethrin (50 and 500 μg/ml) increases more markedly than that of the control. These results indicate that the tetramethrin used in this study is DNA-damaging to mammalian cells and mutagenic to S. typhjmurium. Tile authors believe that the combination of UDS assay with Ames test, supplemented with the fluctuation test if necessary, would give a high value of sensitivity in screening mutagenic/carcinogenic chemicals.

我们用以下方法研究了胺菊酯(合成拟除虫菊酯)的遗传毒性:①非程序性DNA合成(UDS)检测胺菊酯对FL细胞DNA的损伤作用;②平板掺入试验及波动试验检测由胺菊酯诱发的鼠伤寒沙门氏菌的回复突变。结果:①胺菊酯浓度5×10~(-2)~5×10~0μg/ml,不论检测系统中是否加入S9混合物均诱发FL细胞的UDS,并呈剂量反应关系;②在平板试验中,如检测系统中不加S9混合物,胺菊酯(5、50及500μg/皿)不诱发TA100、TA98及TA97的回复突变;加入S9混合物,胺菊酯(500μg/皿)使TA100及TA97的回度菌落数增加至对照的两倍左右;③在波动试验中,检测系统不论是否加进S9混合物,胺菊酯(50及500μg/ml)诱发的TA97的阳性管数均显著高于对照管。上述结果证实胺菊酯对哺乳类细胞的DNA有损伤作用并对鼠伤寒沙门氏菌有诱变性,我们认为,如将UDS检测与Ames试验结合,必要时辅以波动试验,可提高对致突变性和致癌性化合物在初筛中的检测价值。

 
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