对数

In order to improve the security, a signature scheme based on two hard problem assumptions is proposed. The security of the scheme is based on the difficulties of simultaneously solving the elliptic curve and quadratic residue. A attacker can't forge the signature of messages even if a attacker can solve theelliptic curve discrete logarithm problems or quadratic residue problem in the scheme.

为了提高签名的安全性，本文对Wang等人提出的签名方案进行改进，提出了一个基于椭圆曲线离散对数问题和二次剩余问题的数字签名方案，并对该方案的安全性进行分析，指出在椭圆曲线离散对数问题或二次剩余问题可解的情况下，攻击者也无法伪造消息的签名。

Tion coefficient. 1 The number of species-pairs having positive or negative correlation for Spearman's rank

结果表明：1 秩相关检验的正负相关种对数均高于相关系数检验的种对数

Several have integral, mark and 0; have; of sheer number, relative number, average to plus, negative, reciprocal,; also includes rational number, surd; median of even number, odd, decimal;, mode, logarithm,, these are maths the basiccest in kingdom indispensable, it is scientific domain enumerated foundation.

数有整数、分数和零；有绝对数、相对数、平均数；有正数、负数、倒数、；也包含有理数、无理数；偶数、奇数、小数；中位数、众数、对数、指数、函数等等，这些都是数学王国里最基本的不可缺少的，是科学领域计数的基础。

Six thermophilic bacteria were isolated and purified from a hot spring in Chang-bai mountains,One of those morphology has been studied detailedly,it's growth course has been observed,we find it's morphology is very peculiar,at different growth phase,it's morphology changed very evidence,in the logarithmic growth phase,the cell is rod, majority cells are single existence,minority are geminous or a long discontinuous chain,in the middle growth phase,rod and globe are concomitant,in the late stationary growth phase, the cells change to globe.

从长白山中一个温泉里面分离，纯化出来六株高温菌，我们对于其中一株CW2的个体形态做了详细的研究，对它的生长过程连续监测，发现它的个体形态比较特别，在不同的生长阶段，它的个体形态变化非常明显。菌体在对数生长期初期是杆状，大多数单生，少数对生或者形成间断的长链，在中期就是球形和杆形共存，在对数生长期的末期基本上是球形。

A new strip-line beam position monitor system was designed recently,which is not interceptive to beam,qualified in precision and easy to digitalize the results.

信号处理系统选用对数比的信号处理方法，由带通滤波器、对数检波模块、信号放大器、模数转换模块和上位机组成。

Hypercube has many advantages, such as smaller diameter, simple routing algorithm, many parallel paths between any two nodes, and fault-tolerance, on the other hand that the Hypercube nodal degree increased logarithmetically to the number of nodes has limited network population. So we propose a constant nodal degree hierarchical topology to remedy the weakness of Hypercube and take advantages of Hypercube most. Given the definition of FCCN we analyse the basic properties including nodal degree , number of links , extensibility and diameter (maximum network communication delay). Also we proposed a simple and self-routing algorithm applied in FCCN. Although the self-routing algorithm is not optimal, but at more than 82% case it can get the shortest path, and the percent is larger and larger increased with network levels. By the self-routing algorithm the internodal distance is calculated to evaluate the network communication delay more clearly. The average internal distance is in order of the cubic root of the network population that is almost same as logarithmetically relation in a few thousands. FCCN is a highly scalable network due to its recursive construction.

首先在比较了基本互连网络的基础上，看到超立体网络的杰出性能，包括网络直径小、寻路算法简单且为自寻路算法、容错能力好等等，但是由于其节点度随网络的规模的增加而按对数关系增长，使得超立体网络的应用规模受到极大限制，所以为了能最大限度利用超立体网络的优点的同时弥补其节点度方面的不足，作者提出了节点度等于常数4的FCCN网络结构，来最多地利用立方体网络的优点；然后在对FCCN网络进行严格的定义后，分析了网络的节点度、链路数、延伸特性、网络的直径（决定网络的最大通讯延迟）等，并提出了适于FCCN网络的简单的自寻路算法，计算自寻路算法可得到最短路径的比例，看到在多于82％以上的情况自寻路算法都是最优的，而且比例随网络层数的增加而增加；应用所提出的自寻路算法计算了可以更加准确反映网络通讯延迟的参数—网络平均节点距离，计算得到此参数与网络大小的立方根成正比，此比例关系在网络的规模在几千节点以内与对数关系的网络几乎一样；FCCN网络是一高度可扩展结构，这是因为FCCN的递归构成方式，使得网络在增加节点时其原有的拓扑结构可以保持不变，不需对网络进行重新设计，为网络的实用扩展提供了条件；理论分析得出FCCN网络是一种高度可扩展高性能网络的结论。

Results The latent phase of the primary culture cells was 5-9 days, followed by 11-16 days of logarithmical proliferation; the plateau began at day 18-20. The subcultures showed 12-24 hours of latent phase, followed by 7-10 days of logarithmical proliferation, then entered the plateau (11-13 days). The hMSC expressed positive CD44 unanimously, but don′t expressed CD45. Low concentration of bFGF (10 μg·L-1) could stimulate the proliferation of hMSC significantly (P.05); while 25-100 μg·L-1 of bFGF could inhibit the ALP activity.

结果：原代培养细胞生长潜伏期5~9 d，对数增殖期11~16 d，生长平台期18~20 d；传代培养细胞生长潜伏期12~24 h，对数增殖期为7~10 d，11~13 d进入细胞生长平台期。hMSC均一表达CD44，不表达CD45.bFGF在较低浓度（10 μg·L-1）时即有显著的促进hMSC增殖的作用（P.05）， bFGF在25~100 μg·L-1对hMSC的ALP活性有较显著的抑制作用。

Elevated CO〓 to 700μL L〓 enhanced the growth of Nitzschia palea by 4-20％at the beginning of exponential phase, and that of Chaetoceros muelleri by 11-31％in the late exponential phase.

谷皮菱形藻和牟氏角毛藻，在CO〓浓度倍增（700μL L〓 CO〓）条件下，前者的生长从对数期开始受到促进，而后者的促进出现在对数末期；CO〓浓度倍增使稳定期的最大生物量，谷皮菱形藻增加4-20％，牟氏角毛藻增加11-31％。

For the sake of developing an effective, safe and no pollution disinfectant to reduce or eliminate food-borne pathogens on shell eggs, the bactericidal activity of neutral electrolyzed water (NEW, pH 6.0-7.5) generated by electrolysis of diluted hydrochloric acid in a non-membrane electrolytic cell for inactivation of Salmonella pullorum, Escherichia coli O157:H7 and artificial inoculated shell eggs initial logarithm of population of two pathogens on the eggs were approximately 6.19-6.26 log10 (cfu/g and 6.12-6.19 log10 respectively was evaluated.

为寻求一种高效、安全、无污染的禽蛋清洗消毒剂，采用无隔膜电解装置电解稀盐酸溶液制备中性电解水（pH值6.0～7.5）考查不同有效氯浓度、处理时间和温度条件下中性电解水对鸡蛋人工接种鸡白痢沙门氏菌（Salmonella pullorum，鸡蛋表面的初始菌落数对数为6.19～6.26 log10）和大肠杆菌O157：H7（鸡蛋表面的初始菌落数对数为6.12～6.19 log10）的杀灭效果。

In the shaly formation, it is nonlinear relationship between the logarithm of the resistivity index and the logarithm of water saturation. The saturation exponent changes with resistivity index, with different changes under different pore structure and shale conditions.

在泥质地层中，电阻率指数的对数与含水饱和度的对数之间是非线性关系，即饱和度指数随电阻率指数的变化而变化，而且不同孔隙结构、泥质条件下其变化不同。

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。