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    A characteristic value(ti) of atom i was defined as ti=1/2×n2i/mi×pi×(χi/χCsp3)1.5×(∑eij+hiēi),and the molecular connectivity index mL was built based on it. The zeroth-order,first-order among mL were modified as:0L=∑(ti)0.5+β0.5;
    分子中原子i的特征值定义为:ti=1/2×n2i/mi×pi×(χi/χCsp3)1.5×(∑eij+hiēi),由ti建构了分子连接性指数mL,其中的零阶指数、一阶指数修正为:0L=∑(ti)0.5+β0.5;
    The zeroth-order Randi index of G is defined as R0α(G)=∑v∈Vdαv,where α is an arbitrary real number.
    G的零阶广义Randi指数定义为Rα0(G)=∑v∈Vdvα,其中α为任意实数。
    Experiment Research of Zeroth-order Diffraction Efficiency of 80 mm×80 mm Color-separation Grating
    80 mm×80 mm衍射光栅零级衍射效率实验研究
    Zeroth-order General Randi Index of Tress with Diameter Not More Than 4
    直径不超过4的树的零阶广义Randi指数
    Compositional variations of energy gaps for A_xB_(1-x)-type alloys,such as GaAs_2P_(1-x),are calculated by the coherent-potential approximation method based on a tight-binding approximation using LCAO. Zeroth-order approximation is taken from the vir-tual-crystal approximation.
    以虚晶近似(VCA)为零级近似,计入相干势近似(CPA)修正,使用由原子轨道的Bloch和为基的紧束缚方法(LCAO)计算了A_xB_(1-x)型合金GaAs_xP_(1-x)的能隙E_g随浓度x的变化.
    This paper designs rectangular phase grating in structure in terms of interconnection requirements for diffration patterns to give rise to two types of special diffraction patterns thatonly include the zeroth order and±1 order or only±1 order for implementing optical butterfly interconnection and manipulator network.
    根据近年来光互连对光栅衍时模式的要求,对矩型位相光栅进行了结构设计,以产生只含有0级和±1级,或只含有±1级的两种特殊的衍射模式,分别用于实现光学蝶形互连或操纵器网络互连等。
    The zeroth-order connectivity indexes 0Y of 157 alkanes are calculated and correlated with the standard entropies of the alkanes, and the property is well modeled (R=0.9985).
    将 15 7种气态链烷烃的标准熵与其0 Y相关联 ,R =0 .9985 ,属于优级模型 .
    A necessary condition for diffusion-driven instability of n-species (n≥3) of a reaction-diffusion system is concluded by analyzing the zeroth order term of eigenpolynomial of linearized matrix.
    讨论了含有n(n≥3)个物种的反应扩散系统的扩散驱动不稳定性,通过分析其线性化矩阵特征多项式的零次项,得到了系统产生扩散驱动不稳定性的一个必要条件.
    The exact solutions to the zeroth-order equation can be derived by Jacobi elliptic function expansion method,and then the first-order and the second-order equations can be solved by using Lamé equation and lamé functions.
    应用Jacobi椭圆函数展开法求得了零级近似方程的准确解,并在Lamé方程和Lamé函数的基础上分别求得一级近似方程和二级近似方程的准确解。
    A HYDRODYNAMIC VELOCITY-SPLITTING MODEL WITH A DEPTH-VARYING EDDY VISCOSITY IN SHALLOW SEAS (Ⅱ) AN APPLICATION OF THE VELOCITY-SPLITTING MODEL TO THE ZEROTH-ORDER MODEL OF THE ULTRA-SHALLOW WATER STORM SURGES
    浅海流体动力学一种含变湍粘性系数的流速分解模型(Ⅱ)——模型在超浅海风暴潮零阶问题中的应用
    Uniform Difference Scheme for a Singularly Perturbed Linear 2nd Order Hyperbolic Problem with Zeroth Order Reduced Equation
    具有零阶退化方程的二阶双曲型方程奇异摄动问题的一致差分格式
    The Zeroth-order Bessel Function and Nondiffraction Beams
    无衍射光束与零阶贝塞尔函数
    We first improve the method proposed by Yao et al to resolve the X-ray dust scat-tering halos of point sources from the zeroth order data in CC-mode or the first or-der data in TE mode with Chandra HETG/ACIS. Using this method we re-analyzethe Cygnus X-1 data observed with Chandra. Then we studied the X-ray dust scat-tering halos around 17 bright X-ray point sources using Chandra data.
    因此我们首先改进了Yao等人提出的从HETG/ACIS的CC模式的0阶数据或者用TE模式中的1阶数据提取小角度处的晕的径向分布的方法,并重新分析了Chandra观测的Cygnus X-1数据。
    Then 3 kinds of recognition algorithm, including zeroth order moments, gray histogram and color histogram, have been tested for this system.
    分别用几何零阶矩和图像的灰度、彩色直方图的方法进行识别。
    Form the experiment results, we can see that zeroth order moments method is not appropriate for this reconstruction and recognition system because it discards all the detail information of an image color and texture. However, considering on all pixel color, color histogram is suitable for this recognition system.
    从仿真结果可以看出,由于零阶矩没有利用图像的全部颜色细节和纹理信息,识别效果不是很好,而彩色直方图比较的方法是针对于上述飞机模型库进行识别的合适的方法。
    In this thesis, we analyze the zeroth order term of eigenpolynomial of linearized matrix, and a necessary condition for diffusion-driven instability of n-species of a reaction-diffusion system is attained by using the Routh-Hurwitz criterion.
    本文我们讨论含有n(。23)个物种的反应系统,对系统在无扩散时稳定的平衡态解附近线性化,通过分析线性化矩阵特征多项式的零次项,根据Routh一Hurwitz准则,得到了零次项使系统产生扩散驱动不稳定性的必要条件.
    In Lax's study, he found that the paraxial result is the zeroth-order solution of Maxwell's equations when the fields are expanded in the powers of an expansion parameter f, which is the ration of the beam waist and the so-called diffraction length.
    Lax从麦克斯韦方程组出发,将电场分量展开为小参量f=1/kω_0的无穷幂级数的形式(k为光波数,ω_0为光束束腰宽度)。
    So based on these we can simulate the lagrange circulation in East China Sea much better. The zeroth order and first order circulations in winter and summer are simulated in East China Sea based on the 3-D dynamics model.
    基于东中国海Lagrange环流的三维动力学模型,对东中国海环流进行了季平均(冬、夏)的零阶和一阶模拟。
    The zeroth order circulations (surface and depth-averaged) approximatively reflect basic characteristics of the circulation in the East Sea.
    零阶环流近似地反映了东海环流的基本特征;
    The trace of this matrix appears neither in the zeroth order term of the mass relation nor in the production and decay interactions of particles.
    该矩阵的阵迹在质量公式零级项和粒子产生及衰变相互作用中都不出现。
 

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