指数

8 Chapter 3 Number Systems and Boolean Algebra 3.1.2 Positional Notation The exponential powers of the positions are critical for understanding numbers in other numbering systems.

位的指数幂在理解其他计数制中的数时是个关键。基数小数位的指数幂在理解其他计数制中的数时是个关键。

Based on the relationship between matrix and symmetric matrix global exponential stability of the discrete-time neural networks model and the result of exponential convergence rate were obtained by using the characteristics of eigenvalues of a positive definite matrix and introducing a proper factor.

针对带有边界约束的凸二次规划问题，利用离散神经网络模型的建模原理，构造了一个神经网络模型。利用矩阵与对称矩阵的关系和正定矩阵特征值的性质，通过引入一个适当的因子，得到了该离散型神经网络模型是全局指数稳定性和指数收敛率的结果。同时分析了该结果的优越性和存在的不足，提出了解决的3种方法，最后给出了实例说明本方法取得结果的实用性

The number of positive cells of PCNA in 63 cases of tissue was represented...

结果 ：下咽癌组PCNA增殖指数为(71 。4 8± 1 1 。1 4 )%，对照组为(2 1 。1 3±1 2 。0 7)%，其差异有显著性意义(P 。0 5 )；PCNA增殖指数与癌的临床分期、组织分化程度及预后相关，而与是否有颈淋巴结转移和肿瘤发生部位无明显关系，且免疫组化和原位杂交两种检测结果相一致(符合率为 85 。7%)。

The power exponent, however, is much smaller than that predicted by the linear adiabatic theorem.

这个函数关系与线性系统的绝热参量和绝热保真度的幂律关系非常相似，但该系统的幂指数要远小于线性系统的幂指数。

The residual resistance factor of foam to gas and water decreased in power exponent with equilibrium time.

结果表明，随着氮气注入压差的增加，泡沫对气体的初始残余阻力系数呈幂指数增加；而其残余阻力系数随时间均呈幂指数下降。

With the same noise level, white noise has the most striking effect. And the effect of noise is weakened with the increase of power spectral exponent a.

在同一噪声水平下，白噪声的影响最为显著，随功率谱指数α的增大，其影响逐渐减弱；随着噪声水平的增加，1/f噪声对计算混沌动力系统最大Lyapunov指数的影响越显著。

Write a program that prompts the user to input two numbers, the base and exponent. Print the result of raising the base to the power of the exponent.

编写程序，要求用户输入两个数——底数和指数，输出底数的指数次方的结果。

A price index is a measure of the average level of prices.

价格指数是关于平均价格指数的指标。

The amount the interest rate varies is usually tied to an index such as the prime index.

金额利率变化通常挂钩指数等主要指数。

objective to determine the menarche age among female students and the relation between body fat and menarche in anhui province to provide theoretical basis for adopting intervention measure and carrying out health education.methods probability unit regression were used to calculate mmas in 3 000 girls aged 9～18 years old,who were selected from 3 areas in 2005.results mmas were 12.76 and 13.11 years old for urban and rural girls respectively.the youngest age was 10.the menarche age was significantly,related with bmi sebum thickness of abdomen,sebum thickness of shoulder blade and the upper arm.conclusion there was significant relationship between menarche age and body fat.menarche age showed an ahead trend in han national students in anhui province.sex eduction should be conducted in advance,and it was important to strengthen sex education in adolescent.

目的 了解安徽省女生月经初潮及初潮前后体脂变化情况，为采取干预措施和健康教育提供理论依据。方法按照2005年全国学生体质调研要求，采用分层整群抽样方法，对安徽省南、中、北3个地区城乡9～18岁中小学女生3000人进行调查，并测量体质指数、腹部皮脂厚度、上臂皮脂厚度和肩胛下皮脂厚度4项指标。结果城市女生半数月经初潮平均年龄为12.76岁，农村女生13.11岁，城乡最小月经初潮年龄均为10岁。体质指数、腹部皮脂厚度、上臂皮脂厚度和肩胛下皮脂厚度4项指标均值来潮组均大于未来潮组，差异有统计学意义，p.01。结论月经初潮年龄与体脂因素关系密切；安徽省汉族学生月经初潮年龄呈现提前趋势，性教育应提前，加强青春期性教育尤为重要。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。