双

In this paper, by supposing the currents on the two lines are equal but opposite and with the application of bifilar transmission-line theory, the current-voltage relationships of the asymmetrical bifilar even transmission line are obtained.

该文在假设双线传输线两线上电流大小相等、方向相反的条件下，运用双线传输线理论思想，推得不对称双线均匀传输线的电压、电流关系。

At first the principle of bifocal imaging and it's precision influenced by calibrating precision of principal point are analyzed,and two invariants of principal point are found in the two bifocal images.And then based on the two invariants a novel bifocus depth-estimating algorithm is proposed to steer clear of the principal point calibration and improve the depth estimating precision.

本文首先分析了图像主点坐标标定对双焦测距精度的影响，找到了双焦图像中两种相对于主点坐标的不变量，进而提出了基于此不变量的双焦测距算法，避免了繁琐的标定环节并提高了算法精度。

This paper presents the boundary value problem solved as the biharmonic equation of upper plane and strip domain with Green functional method and it deals with the numerical solution of bihormonic equation, using the Matlab program calculation to realize the visualization of numeric solution.

用Green函数法求解了区域为上半平面和带形区域的双调和泊松方程的边值问题；以及探讨了双调和方程的数值解，并用Matlab编程计算实现了双调和方程数值解的可视化。

All real simple Malcev algebra,are classified according to whether or not they have a compatible complex structure and simultaneously we give all the invariant bilinear forms by the killing form of the real simple Malcev algebra or the killing form of it s complexification .

研究实单Malcev代数上的不变双线性型，仿照李代数的情形给出实Malcev代数上的容许复结构、实Malcev代数的复化以及Malcev代数上的不变双线性型等概念，并通过对实单Malcev代数上容许复结构的讨论，将实单Malcev代数上的不变双线性型分为两种情形。

Therefore in recent, the research about bilinear mapping based group signature is also at a start stage, there are no a bilinear mapping based group signature scheme obtains common recognition. There are some design defects in existing schemes, and the security is not very ideal.

所以目前基于双线性映射的群签名还处于一个起步阶段，还没有一个有代表性的基于双线性映射的群签名方案，而现有的一些基于双线性映射的群签名方案的设计缺陷较多，且安全性较差。

A comprehensive research has made in the application of elliptic curve based bilinear mapping in the group signature, security of bilinear mapping is established on the GAP group. Because the DDH problem is easy to solve in GAP, this fact results it is very difficult to design a bilinear mapping based group signature scheme which can satisfy anonymity and the tractability.

对基于椭圆曲线的双线性映射在群签名中的应用进行了深入的研究，由于双线性映射的安全性建立在GAP群上，而在GAP群上的DDH问题是容易求解的，这样导致在基于双线性映射的群签名方案设计中很难同时兼顾群签名的匿名性和可跟踪性。

A comprehensive research has made in designing technologies of bilinear mapping based threshold group signature scheme. A bilinear mapping based chamellon threshold group signature and a forward security threshold group signature were analyzed, the mistakes and flaws in these schemes were pointed out.

对基于双线性映射的门限群签名方案设计技术进行了深入的研究，分析了一个基于双线性映射的卡梅隆门限群签名和一个基于双线性映射的前向安全的门限群签名，指出了这些方案设计中存在的一些设计错误和缺陷。

Firstly, an ID-based signature scheme is proposed based on pairings. The bilinearity and non-degeneration of pairings are explored to make the verification result of the signature vary only with the identity of the signer.

基于双线性对构造了一种基于身份的签名算法，利用双线性对的双线性和非退化性，使得算法中签名矢量的验证结果相对于用户身份为一个常量。

Through the analysis of Black Sea data, it is demonstrated that whether or not a bimodal distribution depends strongly on the estimating methods and the truthfulness of bimodal distribution obtained by the maximum likelihood method is doubted.

数值模拟表明贝叶斯方法对双峰方向分布估计的有效性，将其应用于黑海实测资料，证明双峰方向分布的出现依赖于估计方法分辨力的大小，而用最大似然法得到的双峰方向分布值得怀疑。

Let H be a bialgebra , M be an H - Hopf bimodule .Suppose H⊕M is a bialgebra .

设H是双代数，M是H - Hopf双模，再设H⊕M是双代数。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。