非公式的

Two useful formulae for calculating the attenuation constant of conductor loss for TEm0 and TE0n modes of the rectangular waveguide are derived, and the loss characteristic in the rectangular waveguide is analyzed and computed.

根据横向谐振原理和微扰理论，本文提出了一种分析非理想波导损耗特性的新方法，推导出了一组计算矩形波导TEmO和TEOn模导体损耗的衰减常数公式，并分析计算了矩形波导的损耗特性。

We give out the formula of the ordinary solution of the second order linear homogeneous differential equations with the parameter"λ" and the two kinds of second order linear nonhomogeneous differential equations with the parameter"λ".

给出了含参数λ的二阶线性齐次微分方程及两类含参数λ的二阶线性非齐次微分方程的通解公式。

By use of residue theorem,the trace identity of eigenvalue which correspond to the eigenvalue problem is obtained.

讨论了一个带非局部项的微分方程初值问题解的渐进估计，并利用留数定理给出相应特征值问题特征值的迹公式。

In order to speed up the k-PNN query processing,efficient spatial and probabilistic pruning approaches are used to reduce the search space,thus the costly numerical evaluation of complex integrals can be avoided as much aspossible.

因此，必须尽量缩小查询所需搜索的空间范围，从而在不影响返回正确结果集的情况下，进一步减少所要考虑的非确定对象，在很大程度上避免利用原始计算公式来返回结果集。

The symbolic expression, which based on integral solution give the equation of asymmetric traveltime, have great significance on focusing capability of Kirchhoff integral method.

基于积分解的象征表达式给出了非对称走时公式，对改善Kirchhoff积分的聚焦性能有重要意义。

Increasing the dimensions and burying depth of the grounding electrode, as well as the ground conductivity can effectively decrease the grounding impedance. In terms of the FDTD algorithm, an unsplit formulation of the Berenger''s PML and MPML and the modified difference equation near the sharp metal edge in FDTD grid are presented.

在FDTD算法方面，提出了Berenger PML及MPML场分量非分裂形式的公式；对金属薄板边缘场差分方程进行了修正，取得与实测数据一致的计算结果。

We present a general density evolution-based procedure which finds the optimal puncturing of a base code.

本节根据非规则码的密度进化理论推导出RC-LDPC码的密度进化公式。

The main results are:In logic system ,G,tautologies can not be get by using upgrade algorithm to non tautologies within finite many times;In logic system G n,tautologies can be get by using upgrade algorithm to an arbitrary formula of F at most n times; Congruence partitions about on F have been given in logi...

主要结果是：在逻辑系统 G，G中，重言式不可能由对非重言式进行有限次升级算法得到；在逻辑系统 Gn 中，对任一公式最多进行 n次升级算法即可得到重言式；利用可达广义重言式概念和α-矛盾式概念分别在 G，G，Gn 中给出了 F的一个关于同余的分划。

The main results are:In logic system r,G r, tautologies can not be get by using upgrade algorithm to non tautologies within finite many times; In logic system S n , tautologies can be get by using upgrade algorithm to an arbitrary formula of F at most n times; Congruence partitions about ...

主要结果是：在逻辑系统 Gr，Gr 中，重言式不可能由对非重言式进行有限次升级算法得到；在逻辑系统Sn 中，对任一公式最多进行n次升级算法即可得到重言式；利用可达广义重言式概念和α矛盾式概念分别在 Gr，Gr，Sn 中给出了F的一个关于同余的分划。

The conductivity of three rare-earth nitrates: Ce(NO3)3, La(NO3)3 and Y(NO3)3 ,was measured in non-aqueous solvent such as: C2H5 OH、CH3 COCH3、DMF at different temperatures. The use of formula has calculated the molar conductivity of Ce(NO3)3, La(NO3)3 and Y(NO3)3 at 25℃.

研究了不同温度下3种稀土硝酸盐：Ce(NO3)3、La(NO3)3、Y(NO3)3，在非水溶剂中（无水乙醇、丙酮、DMF）的电导性质，并利用公式求得25℃时Ce(NO3)3、La(NO3)3、Y(NO3)3的摩尔电导率。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。