基本参数

Aiming at the premature convergence of the simple genetic algorithm, variance parameter genetic algorithm , which is based on the diversity of population, is proposed.

该文针对基本遗传算法所存在的缺陷——早熟现象进行了分析，并在此基础上提出了基于种群多样度的变参数遗传算法。

And the solutions of the three problems above are discussed:The solution to the simulcast interfering which is caused by the simulcast delay spread and the zero-beating is given in chapter four.Based on the well understanding of the principle of MS-I/H/0 in IPNP, the examples are given in chapter five on how to solve the problem of communication interruption between paging zones.Through the analyse of signal switching between Chengdu and Deyang, the synchronization error between FLEX frames, and the bug in the multi-frequency roaming principle are pointed out. And solutions are also recommended.

通过以上分析，文章探讨了对上述三个问题的解决：·对同播干扰问题，分别分析了时延差和零拍频所造成同播干扰的客观存在，探讨了系统设计和网络优化的基本方法；·对IPNP联网障碍，提出了在掌握IPNP对各PNCC作为输入局／归属局╱输出局的灵活定义、以及相关参数配置原理的基础上，分析联网障碍的思路；·对信号切换障碍，以成都和德阳两地的局部广域覆盖为例，分析了FLEX帧失步和FLEX多频漫游原理设计缺陷的客观存在，并探讨了相关的解决方法和建议。

For the capacity of propeller turbine is often small, people pay little importance on the transformation of reducing capacity under specified conditions. So, nowadays little research mentioned above has been developed.For the particularity of the designed factors, the author has improved the traditional theory, and has fined an available Method of singular point distribution. At present, no one has developed CAD hydraulic design software of lower specific speed axial flow runner in our country.

由于设计条件的特殊性，在研究设计方法过程中，论文基于传统设计理论，对引用的一些基本规律做了一定改进，在具体设计过程中，对经验参数的选择方法做了一定探索，研究与探索运用奇点分布法设计低比转速轴流式转轮叶片；传统的设计工作全部由人工完成，无法满足当今社会科技生产发展的需要，因此论文开发了一套具有人机对话界面良好特点的低比转速轴流式转轮CAD软件。

The reverse snapback mechanism is theoretically proposed and the mathematical expressions to calculate the voltage and current values at the snapback point are presented. The computing results are compared with the experiment values.

首次给出了反向转折机理的理论解释，并给出了估算转折电压和电流的数学表达式，在常用工艺参数范围内，计算结果和实验测量值基本一致。

Based on the theory of finite element method and modal analysis, the model of a piano soundboard is established in the ANSYS, then the models' natural frequency, mode shape are calculated. What is more, the influence of tree species on the piano soundboard's fundamental frequency is discussed.

基于有限元法和模态分析的基本理论，利用有限元分析软件ANSYS建立了钢琴音板的有限元模型，然后对钢琴音板进行模态分析，得到了它们的固有频率、模态振型等参数，分析了树种对于钢琴音板基频的影响。

Then brief the basic situation of the finite element analysis method and the spectrum tube design situation.

接着介绍了有限元分析方法的基本情况和光谱简的设计情况；论述了如何用有限元方法对系统进行静力分析，如何进行前处理和定义作业参数，如何用计算出的结果对设计进行评估：并对光谱筒系统中的导轨板、桥和下平台进行了有限元分析。

The paper improves the velocity's control rules of a first-order microcosmic stochastic traffic cellular automaton model and incorporates it's stochasticity as a deceleration parameter in the construction of the fundamental diagram used by a macroscopic first-order continuum traffic model.

本文对微观一维随机元胞自动机交通流模型的速度控制规则进行了改进，并将其随机特性转化为减速参数合并到宏观一阶连续介质理论交通流模型中，重新构建了反映流量——密度的交通流基本图。

The author expounded on the basic principle of genetic algorithm and used the algorithm for the optimization of stope structure parameters.

摘 要 阐述了遗传算法的基本原理，并将该算法应用于采场结构参数的优化。

The basic principle and circuit topology of DC side series APF are analyzed; the corresponding control equations are derived; the criteria for the design and selection of principal parameters for main circuit, i.e., the filter inductor and energy storage capacitor, are given to provide theoretical basis for rational design of DC side series APF.

文中对直流侧串联型APF的电路拓扑和基本原理进行了分析，推导了相应的控制实现方程，给出了主电路主要参数的设计和选取标准，为系统的合理设计提供了理论依据。

The concept of magnetic suspending hard disk is put forward,the basic principle of active magnetic force bearing with 5 freedom based on coupling excitation is introduced,the calculation formula of magnetic force and design formula of main structure parameters are inferred.

提出磁悬浮硬盘的概念，介绍了基于耦合激磁的 5自由度主动磁力轴承的基本原理，并推导了磁力的计算公式及其主要结构参数设计公式。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。