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色散值
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  dispersion value
     Measured Vickevs hardness is H_v= 227kg/mm~2 and the reflectivity dispersion value is 35.10-24.13%.
     实测维氏硬度为227kg/mm~2,相当摩氏硬度4.1。 400—700nm波段反射率色散值为35.10—24.13%。
短句来源
     The dispersion managed pairs, consisting of RDF and non-zero dispersion shifted fiber with ultra large effective-core-area (ULAF), have the ultra low dispersion slope of less than 0.006 ps/(nm2·km) at the wavelength range from 1530 nm to 1625 nm, and the largest dispersion value is lower than 0.2 ps/(nm·km).
     由负色散光纤与具有超大有效面积的非零色散位移光纤 (ULAF)组成的色散管理光纤对在 15 30nm到16 2 5nm波长范围内的色散斜率小于 0 .0 0 6ps/(nm2 ·km) ,且最大色散值小于 0 .2ps/(nm·km)。
短句来源
     After midnight, themean whistler dispersion value is lower, implying propagation of whistlers from lowerlatitudes to higher latitudes.
     而在午夜后,哨声的平均色散值较低,有较低纬度的哨声穿出电离层后传播到较高纬度的现象。
短句来源
     When the third ring diameter of varying microstructured fiber has the same value with the diameter of no varying microstructured fiber, the lowest and flattest dispersion curve is obtained, in this case, the dispersion value is about 30 ps/(km·nm) and Δd=0.2 μm. So the flatter and lower dispersion curve can be realized by adjusting the diameters, distribution of air holes, and the hole to hole space.
     当渐变空气孔微结构光纤第三层孔的直径取与孔直径不变微结构光纤的孔直径相同,且第一层到第五层孔直径按每层0.2μm的斜率增长时,其色散曲线最低最平坦,色散值保持在30 ps/(km·nm)左右。
短句来源
     This paper discusses the relation of the cccurrence rate of histles and thistle dispersion value with the magnetic activity in Wuchang and Zhanjiang regions in the winter from 1980 to 1981. The result from ob-servation shows that the whistle activity in the low-latitude, region is positively correlated with the magnetic activity.
     本文介绍了1980年、1981年冬季在湛江、武昌地区哨声出现率和哨声色散值与地磁活动的关系。 观测结果表明,低纬地区哨声活动与地磁活动呈正相关。
短句来源
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  dispersion profile
     Results show that DDF with concave dispersion profile is more beneficial to generate flat and broad SC spectra,when the dispersion profile of the fiber is symmetrical to central wavelength and decreases from anomalous dispersion region to normal with propagation distance.
     结果表明,当光纤的色散值关于中心波长对称、且随着传输距离增加,经由反常色散区过渡到正常色散区的、凹形色散分布的色散渐减光纤更有利于产生平坦、带宽的超连续谱。
短句来源
  “色散值”译为未确定词的双语例句
     The dispersion at the wavelength of 1 550 nm is ~+150 ps/nm-km and the loss is 40 dB/km.
     高非线性MF在波长1 550 nm处色散值约为+150 ps/nm-km。
短句来源
     Furthermore,according to the dispersion property of the conventional fiber,a κ matched dispersion compensation PCF is designed with a dispersion of-519.3ps/km/nm.
     并且针对常规单模光纤色散特性,设计出合适κ值的色散补偿光子晶体光纤,色散值为-519.3ps/km/nm,补偿能力远大于常规色散补偿光纤。
短句来源
     The designed fiber has the effective core area of more than 95 μm 2 and the dispersion of about 9 ps/(nm·km) at 1550 nm, which can suppress the nonlinearity on the transmission system effectively.
     该光纤的有效面积大于 95 μm2 ,在 15 5 0nm波段的色散值约为9ps/(nm·km) ,有效的抑制了传输过程中光非线性效应的产生。
短句来源
     A method for dynamic chromatic dispersion (CD) compensation in a 40Gbit/s single-channeled optical fiber communication system is demonstrated in this paper.
     提出了一种用于40Gbit/s单信道光纤通信系统的动态色度色散补偿方法,该方法通过检测线路中的色散值,以此作为反馈信号控制动态色散补偿器件实现系统的动态色散补偿。
     The lumped amplifiers and filters are placed on the dispersion-managed soliton system with two-step periodic dispersion map.
     色散管理孤子光波系统的色散图周期由具有正负色散值的两段光纤组成,并且在系统中周期性放置集中放大器及滤波器装置。
短句来源
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  dispersion value
Maximum QT dispersion value in rheumatic MVP patients was 55 ms.
      
The P-wave dispersion value was higher in the VVI pacing mode than in the VDD pacing mode (48 ± 8?ms vs 34 ± 7?ms, P >amp;lt; 0.001).
      
A lower dispersion value increases the distance between wavelengths and the potential for higher spectral resolution.
      
Also shown in Figure 16 is the dispersion value for each of the channels in comparison with the target.
      
As can be seen, a very good adjustment of the dispersion value can be obtained on a per channel basis.
      
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  dispersion profile
Microstructure fibers with a special dispersion profile are at the heart of the experimental implementation of this technique.
      
Fibers with an appropriately tailored dispersion profile allow simultaneous phase matching for two types of nonlinear-optical processes-third-harmonic generation and parametric four-wave mixing.
      
Hollow-core photonic-crystal fibers with a special dispersion profile are shown to allow phase-matched nonlinear optical interactions of isolated air-guided modes of high-intensity femtosecond laser pulses confined in the hollow fiber core.
      
A new method to derive the kinetic energies associated to rotational and random motions from the observed rotation curve and velocity dispersion profile of elleptical galaxies is presented.
      
Its efficiency for supercontinuum generation and especially the extension to the blue side can be increased by proper design of the dispersion profile.
      
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In this paper,the general characteristics of low-latitude whistler propagation is investigated by analysing the data obtained at Wuchang (geom.lat.19.2°N) for last three years.Attention is paid to the study of whistler propagation paths.Besides,a closed examination is made of the correlation between the whistler parameters at Wuchang and ionospheric electron concentration,as well as the geomagnetic activity.A good correlation has been found between whistler dispersion and f0F2.It is also shown that there exists...

In this paper,the general characteristics of low-latitude whistler propagation is investigated by analysing the data obtained at Wuchang (geom.lat.19.2°N) for last three years.Attention is paid to the study of whistler propagation paths.Besides,a closed examination is made of the correlation between the whistler parameters at Wuchang and ionospheric electron concentration,as well as the geomagnetic activity.A good correlation has been found between whistler dispersion and f0F2.It is also shown that there exists a type of whistler with stationary dispersion values,the occurrence rate of which is much higher than other types.This is one of the remarkable features of whistlers at Wuchang,showing that in the low-latitude ionosphere region there possibly exist stationary and recurrent whistler propagation paths.In addition,analysis of typical events and statistical calculation both show that the occurrence rate of whistlers increases considerably during magnetic storms.The dispersion value slightly increases following the SSC of the storms,the amplitude of the increase being 118-137% of the monthly mean value.

本文利用武昌(磁纬19.2°N)连续三年的哨声观测资料,研究了武昌地区哨声传播的一般特征。着重对武昌哨声的传播路径进行了分析推断,并讨论了它们与地磁活动的相关特性。发现:武昌哨声的显著特征是色散与电离层f_oF_2有明显的正相关关系;其次常出现一类色散值稳定、出现率也很高的哨声。此外,对典型事件的分析及统计分析都表明武昌哨声出现率在地磁扰动时明显增高;哨声色散在磁暴急始后不久即有一个急剧的上升,上升幅度达18%至37%。

In view of the large difference between the real geomagnetic field and the dipolar model field at low latitudes, ray tracing for whistler-mode wave propagation has been performed with IGRF (n=6). It is found that there are two narrow nonducted propagation outlets of whistler-mode wave at about 9° N and 12°N, their starting regions are in the area of storm activity. The cutoff latitude of outlet of whistler-mode wave is at 8°N-9°N. The results of this computation can be used satisfactorily to explain the fact...

In view of the large difference between the real geomagnetic field and the dipolar model field at low latitudes, ray tracing for whistler-mode wave propagation has been performed with IGRF (n=6). It is found that there are two narrow nonducted propagation outlets of whistler-mode wave at about 9° N and 12°N, their starting regions are in the area of storm activity. The cutoff latitude of outlet of whistler-mode wave is at 8°N-9°N. The results of this computation can be used satisfactorily to explain the fact that the dispersion of whistler at low latitude is in positive correlation with f0F2.

考虑到低纬地磁场与偶极子磁场偏离较大,本文用国际参考场(n=6)进行了低纬哨声射线追迹计算.结果表明,在约9°N和12°N处有两个很窄的哨声波非导传播出口点,相应射线起点都在雷电活动区.哨声波非导传播出口的截止纬度约在8—9°N处.计算结果也较满意地解释了低纬哨声色散值和f_0/F_2正相关的事实.

In this paper the whistler data from three stations, Mohe, Harbin and Beijing, inthe winter of 1983 are statistically analysed. It is shown that whistler activities of thesethree stations have peaks during sunset and after midnight. The mean whistler disper-sion value is larger during sunset, implying that whistlers may propagate from higherlatitudes to lower latitudes after passing through the ionosphere. After midnight, themean whistler dispersion value is lower, implying propagation of whistlers from lowerlatitudes...

In this paper the whistler data from three stations, Mohe, Harbin and Beijing, inthe winter of 1983 are statistically analysed. It is shown that whistler activities of thesethree stations have peaks during sunset and after midnight. The mean whistler disper-sion value is larger during sunset, implying that whistlers may propagate from higherlatitudes to lower latitudes after passing through the ionosphere. After midnight, themean whistler dispersion value is lower, implying propagation of whistlers from lowerlatitudes to higher latitudes. Mohe and Harbin all possess characteristics of middlelatitude type, while Beijing, of lower latitude type.

本文对漠河、哈尔滨、北京三个台站1983年冬季的哨声观测资料进行了统计分析。结果表明,这三个地区的哨声活动在日落和后半夜都同时有高峰出现。在日落期间,哨声的平均色散值较高,出现有较高纬度的哨声穿出电离层后沿地球—电离层波导传播到较低纬度地区的现象;而在午夜后,哨声的平均色散值较低,有较低纬度的哨声穿出电离层后传播到较高纬度的现象。从哨声形态学特征判断,漠河和哈尔滨属于中纬度台站,而北京则属于低纬度台站的范畴。

 
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