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     Soil hydraulic characteristic parameters can be estimated accurately using the Pedo-transfer Functions (PTFs) depending on soil fundamental parameters which are easy to get such as grading of soil, organic content and bulk density.
     然而可以通过容易得到并能保证试验精度的土壤基本物化特征参数,如:颗粒级配、有机质含量和土壤容重等,利用土壤传递函数(PTFs)可以较准确地估算出土壤水力特性参数。
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     (4)the components of modified MSM was easy to get.
     (4)培养基成分容易得到
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     When 0.05≤M≤0.2 which is a typical condition for gas-flow discharge lasers, the gasdynamie equations become the simplest ones. It is quite easy to get an analytical solution and it is possible to measure the distributions of the deposited energy, density, temperature and velocity in flow direction in the active medium by laser interforometry.
     对于典型的气流放电激光器条件,0.05≤M《0.2,气动方程有最简单的形式,很容易得到解析解,并可以用激光干涉法测量沉积能量和密度,温度和速度等气动参数沿流动方向的分布。
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     Experimental results indicate that frequency response specialty and the response analysis are easy to get.
     实验结果表明,利用阻抗法,容易得到构造物的频率响应特性,应答分析也简单.
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     In this paper,using census data which easy to get,by the relative model of census data and disaster loss,it was given the function desigh idea of regional seismic lost rapid evaluating system based on WebGis.
     本文将主要利用容易得到的人口普查数据,通过人口数据及灾害损失的关系模型,给出基于WebGis区域地震损失快速评估系统的功能设计思路。
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     The results show that while the major composition of organic matter of sorbent consists of humic acid(Chelsea soil),sorption of phenanthrene for soil sample is easy to get equilibrium and no clearly hysteresis exists between sorption and desorption.
     结果显示,当土壤有机质是以腐殖酸为主时(Chelsea土壤),样品对疏水性有机化合物的吸附很容易达到平衡,解吸与吸附之间的滞后现象不是很明显。
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  “easy to get”译为未确定词的双语例句
     The cotton seedling grew better in seedling bed when the amount of the three nutritive substance X_1、 X_2、 X3 each reached 8.39~9.32kg/m3, 0.81~0.90kg/m3, 1.26~4.15kg/m3 in the soilless ground substances of the SSR-RNT, and it was easy to get the effect of sound seedling and early development of cotton plant.
     第二,育苗新基质培肥过程中,每立方米无土育苗新基质中分别加入三种营养物质X_1、X_2及X_3为8.39-9.32kg,0.81-0.90kg,1.26-4.15kg时,最适宜棉苗生长,可获得壮苗早发的效果。
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     When K2La2Ti3O10 prepared by sol-gel method is used as photocatalyst for water splitting,the hydrogen production rate is twice of that prepared by polymerized complex. The preparation condition is kind and it is easy to get single phase K2La2Ti3O10 photocatalyst with sol-gel method. When K2La2Ti3O10 is used as photocatalyst with I?
     研究结果表明,溶胶-凝胶法制备的K2La2Ti3O10比聚合-配合法制备的K2La2Ti3O10光催化产氢活性要高出1倍左右,且制备条件友好,所得K2La2Ti3O10具有较好的单相性;
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     (5)Through it is easy to get F_0 seeds by using male sterile lines as female parents in interspecific gene transferring from distantly related wild species to cultivar ones but it is still very difficult to get F_1 plants because seedling emergence percentage of F_0 seeds was only 1.5%~10% and differs noticeably among combinations.
     (5)远缘野栽交基因转育用不育系作母本容易获得F1种子,F0种子播种成苗率因组合而异,为1.5%~10%,说明获得F1植株仍然较难.
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     ③ The perception of social support in postmenopausal women had obvious negative correlations with insomnia, agitation and feeling of loneliness, and aching pain of muscle and joint (r=-0.59, -0.63, -0.49, P < 0.01), decline of physical capacity and easy to get tired was also significantly and negatively correlated with social support (r=-0.37, P < 0.05).
     ③绝经后妇女的领悟社会支持与失眠、烦躁易怒孤独感、肌肉关节酸痛呈明显的负相关,相关系数分别为-0.59,-0.63,-0.49,具有统计学意义(P<0.01); 体力下降易疲劳也与社会支持呈负相关,相关系数为-0.37,也有统计学意义(P<0.05)。
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     Greed search algorithm is an effective and high veracity method,but it is easy to get into the local best.
     贪婪搜索(GS)算法是一种有效且准确性较高的结构学习算法,但贪婪搜索算法很容易陷入局部最优。
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With simple conditions, easy to get from the torch operating parameters, this model leads to apprehend the gas behavior interacting with the surrounding atmosphere outside the torch, in steady or unsteady state.
      
It is easy to get bogged down in the complexities of this topic.
      
Summary statistics concerning the number of relations of each kind are easy to get and provide useful information about the test, information which is related to but different from the usual statistics.
      
With this method, it is easy to get the stereograph and to obtain a complete picture of the lesions.
      
The well-known chaotic circuits are extremely simple, as they are composed only of an inductor and a capacitance diode, and thus it is easy to get the generator to work reliably.
      
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The present paper has utilized the velocity field of axially symmetric vortices given by Chou Pei-yuan and Tsai Shu-tang and their methods of averaging to obtain the triple velocity correlation of homogeneous isotropic turbulence in the final period of decay. In calculation we render the velocity distribution in terms of isotropic tensors, , and use the method of Fourier transform to obtain the velocitycorrelation. With this method of calculation it is very easy to get the double velocity correlation and...

The present paper has utilized the velocity field of axially symmetric vortices given by Chou Pei-yuan and Tsai Shu-tang and their methods of averaging to obtain the triple velocity correlation of homogeneous isotropic turbulence in the final period of decay. In calculation we render the velocity distribution in terms of isotropic tensors, , and use the method of Fourier transform to obtain the velocitycorrelation. With this method of calculation it is very easy to get the double velocity correlation and the computation of the triple velocity correlation is very much simplified. The result of calculation shows that near r = 0 the triple velocity correlation is proportional to r3, and when r is very large it approaches zero as r-4. At present there are no experimental data available for the triple velocity correlation in the final period of decay. If we compare the theoretical result with Stewart and Townsend's measurements for the initial period of decay, we find better agreement for small r; when r is comparatively large, the theoretical curve descends more rapidly than the experimental points. A similar relation exists between the theory for the double velocity correlation in the final period and the measurement of the corresponding correlation for the initial period. In the appendix is given the method of multi-Fourier transform for calculating the triple velocity correlation, which can make the calculation to be even simpler than the method in the paper itself.

本文利用周培源、蔡树棠给出的轴对称涡旋速度埸和求平均值的方法,计算了均匀各向同性湍流后期衰变的三元速度关联.计算时把速度埸表示威各向同性的张最形式,即ui=2/32/β~(1/2β)Ul_ml_nβ_(mni),并且利用Fourler变换通过计算湍谱求得了速度关联.按照这种方法,二元速度关联可以很容易得到.计算结果表明,当r→O时,三元速度关联系数k(r,t)和r~3成正比;当r→∞时,它又按r~-4趋于零.

Optically pumped FIR lasers give only discrete spectrums. This property restricts the practical use of lasers. Since 1977, many research works have been done to tune the output frequency of FIR laser, of which some are tried to find the possibility of tuning the laser lines by changing the pumping frequency continuously. But it is not easy to get an accurate result due to the complexity of theoretical calculation especially for quantum system of more than three energy levels. In this research work, two...

Optically pumped FIR lasers give only discrete spectrums. This property restricts the practical use of lasers. Since 1977, many research works have been done to tune the output frequency of FIR laser, of which some are tried to find the possibility of tuning the laser lines by changing the pumping frequency continuously. But it is not easy to get an accurate result due to the complexity of theoretical calculation especially for quantum system of more than three energy levels. In this research work, two photon processes in four levels system have been studied by means of graph theory, which was developed by T. A. DeTemple et al. It was found that the output frequency of optically pumped FIR laser could be tuned with a frequency range equal to the frequency difference of two FIR transition frequencies. The tuning curves of FIR frequency and the curves of system gain coefficient vs. pump detuning frequencies were given.

光泵远红外激光一般只能提供分立的频谱.这一特点使它的应用受到一定的限制。1977年以来,不少学者对如何进行光泵远红外激光的频率调谐做了许多工作。由于分子的远红外激射跃迁过程是在多能级系统中进行的,所以理论计算相当繁琐,不容易得到比较精确的结果。我们应用图论方法研究了四能级系统的双光子过程。结果表明,通过连续地改变泵的频率,有可能对远红外激光频率进行调谐。频率调谐范围约等于两对远红外跃迁频率之差。本文给出了调谐曲线以及增益系数与泵频率失谐量之间的关系曲线.

In this paper, a new method for analysing the emission lines of solar prominences is presented. The main feature of this method is that the total optical depth (τ0), the Doppler width (ΔλD), and the factor of the change of the source function (α) are determined simultaneously by fitting the observational profile, adopting a changeable source function, and using non-linear least-square method.I. Fundamental MethodIf the source function changes linearly with optical depth, the theoretical profile shown in formulae...

In this paper, a new method for analysing the emission lines of solar prominences is presented. The main feature of this method is that the total optical depth (τ0), the Doppler width (ΔλD), and the factor of the change of the source function (α) are determined simultaneously by fitting the observational profile, adopting a changeable source function, and using non-linear least-square method.I. Fundamental MethodIf the source function changes linearly with optical depth, the theoretical profile shown in formulae (2)-(5) can be derived. Only if a>0, i.e. source function increases toward the center of a prominence, can the self-reverse profile appear. Therefore, the conclusion that the source functions of the Hα lines decrease toward the centers of the prominences, suggested by Jefferies and Orrall, and Stellamacher, should be reconsi-dered. The dependence of the theoretical profile on line parameters, as shown in formulae (7)-(9), is very complex. The ordinary linear least-square method can not be used for observational profile fitting. But, we can give parameters τo, Δλd and a a preliminary estimation by matrix T. The errors between the theoretical and the observational profiles under such a preliminary estimation are expressed by matrix DX. It is easy to get the least-square solution of parameter correction DY by fitting the observational profile, as equation (11) shows. Then, the best estimation of parameters, Y can be derived. Because the dependence of the profile on each parameter is far from linear, in fact, the above process of finding the solution must be repeated until further correcting does not reduce the errors between the theoretical and the observational profiles. The whole process is done by computer.Ⅱ. Main EesultsThe fundamental analyses of the observational profiles of early Balmer lines for ten prominences presented by Ye Shihui are shown in Table l. There, M is the number cf observational points, S is the square sum of errors between the theoretical and the observational profiles. The comparison between the theoretical and the observational profiles are shown in Pig. 1 a-e for prominence four. The results of the analyses of the Hα lines are shown in Table 3 and Fig. 3 a-j from no self-reverse lines through weak self-reverse lines to deep self-reverse lines. From these results the following conclusion can be drawn.1. Ignoring the change of the source function will seriously affect the determination of total optical depth for thick lines, especially for Hαlines; but the supposition of the constant source function is acceptable for most Balmer lines except for Hα and Hβ. The total optical depth will be over-estimated if the increase of the source function toward the center of a prominence is ignored; the total optical depth will be underestimated if the decrease of the source function is ignored.2. Extinction by self-absorption also bears a relationship with the change of the source function. When the source function increases towards the center of a prominence, extinction by self-absorption will be stronger; vice versa, extinction will be weaker. We have re-estimated the extinction by self-absorption for early Balmer lines. The results are shown in Table 2. Although it is not the thickest and brightest, the sixth prominence has the strongest extinction by self-absorption because of bigger a. The total energy of the Hα line for this prominence has been reduced by a factor of 14.27. It seems that Unsold under-estimated the effect of self-absorption, while Ye Shihui over-estimated the effect.The formulae (13-17) can be used for determining the theoretical extinction by self-absorption if radiation damping is ignored.3. The source functions of self-reverse Ha lines increase toward the centers of the prominences. The source functions in the center are 1.2-2.5 times those on the boundary. When the total optical depth is not very thick, as in prominence 8, the self-reversion can not appear, although the source function increases toward the center of the prominence. With the increase of TO and a, t

本文提供了日珥发射线光谱分析的一种新方法。它允许源函数随光学深度变化,采用非线性最小二乘拟合,直接从观测轮廓同时确定线心光学厚度τ_0、Doppler宽度△λ_D和源函数变化因子α。 本文用这个方法给出了对文献[1]十个日珥早 Balmer 线的分析结果。这些结果表明,自反变H_α线源函数向日珥内增加,中心源函数是边缘的1.2~2.5倍;忽略源函数的这种变化,将使H_α线τ_0的确定明显偏大;日珥的自吸收减弱亦与源函数变化有关。 对日珥源函数变化的讨论,支持关于日珥辐射激发的主要机制是散射太阳入射辐射的论点。

 
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