对数

The paper discomposed the CO2 emissions during the period of 1990~2007 using logarithm mean Divisa method based on Chinese energy consuming and economic growth.

基于我国能源消费和经济增长特点，采用对数平均的Divisa方法对我国1990~2007年的CO2排放进行分解分析。

According to the characteristic of discontinuous function, we use the multi-expression mining method. This method has relatively low complexity.

该方法是对基因表达式算法的改进，能够挖掘间断函数，具有对数数量级的复杂度。

The security was based on difficulties in factorizing large integer and computing discrete logarithm on Abel group C.

该方案的安全性基於大数分解和有限Abel群C上计算离散对数的困难性。

Group signature ; discrete logarithm ; private key

群签名；离散对数；密钥

This problem is defined as: Given points X, Y on the elliptic curve, find z such that: X = zY The discrete logarithm problem over this group in a finite field is a good one way function because there are currently no known polynomial time attacks forsolving the problem.

这个问题是指：鉴于点X和Y的椭圆曲线，找到这样： X =模糊离散对数问题，这个集团在有限的领域是一个很好的方法之一的功能，因为目前没有任何已知的攻击forsolving多项式时间的问题。

Cryptographic protocol ; discrete logarithm ; group signature

密码协议；离散对数；群签名

In this dissertation, two new proxy signature schemes from bilinear pairing are proposed, which are all based on discrete logarithm problem on GDH group. In the first scheme, the proxy signing ability can be revoked during the period of validity. Then, the malicious signer can not sign messages any more. Moreover, in this scheme secure channels are not needed.

本文基于GDH群的离散对数问题结合短签名的特点设计了两个代理签名体制，第一个体制可以在证书的有效期内撤销代理签名权，从而防止不诚实的代理签名者继续签名，而且无需安全信道。

In chapter 2, we research the digital signature schemes based on discrete logarithm problem.

本文第二章对基于离散对数问题的数字签名方案进行研究。

The security of this scheme is based on the difficulty of solving the discrete logarithm problem.

方案的安全性是基于离散对数问题的难解性。

A new key/keys exchange protocol based on the discrete logarithms problem is proposed in this paper.

文章提出一种新的基于离散对数的单／多密钥交换协议。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。