稳定化

Based on the first linearized Boussinesq equation, analytical solution of the transient groundwater model, which is used for describing phreatic flow in a semi-infinite aquifer bounded by a linear stream and subjected to time-dependent vertical seepage, is derived out by Laplace transform and the convolution integral.

在河渠边界控制下的半无限含水层中，对时变垂向入渗影响下的潜水非稳定渗流模型，利用Boussinesq第一线性化方法，通过Laplace变换并结合卷积原理，导出模型的解析解。

In the process of network-forming, viscosity gradually increase with time, and then level off after certain time.

化学网构改性沥青在网构化过程中，在一定的条件下，粘度随着时间的延长逐渐增大，达到一定时间后便趋于稳定。

Finally, the linear approximation analysis is proved by example to be effective and the relation among parameters when kangaroo robot hops stably is obtained.

最后，通过实例证明了采用线性化近似分析的有效性，并获得了仿袋鼠机器人稳定跳跃时各参数之间的变化关系。

Fault gouge ; High temperature and pressure ; Stress-Strain ; Lithification ; Stable sliding ; Earthquake

断层泥；高温高压；应力-应变；岩化；稳定滑动；地震

By using the hybrid-sensitivity scheme, a H〓 controller is devised and H〓 control in the new MB system is compared with that of PID control. The standard bi-state magnetic bearing amplifier have some disadvantages such as high current harmonics, low reliability and the current mode switching for tri-state amplifier is expounded.

首次将H〓鲁棒控制策略应用于集成化磁轴承系统，详细论述了H〓控制器的设计过程，并与经典PID控制策略进行了比较，表明了H〓控制器优良的抗干扰能力和稳定的鲁棒性。

In the chapter 3,we base on the existence of periodic solution ,using the method of linearization and applying the mean value theorem and the variation-of-constants formula, we get the sufficient condition of the exponential stability of periodic solution of a class of nonlinear functional differential system .

在第三章中，建立在系统周期解存在的基础上，利用线性化的方法，根据微分中值定理和常量变差公式，得到了一类非线性泛函微分系统周期解指数稳定的充分条件。

The structure-toxicity relationship of 59 substituted benzenes was studied by the method of bayesian regularization neural network,and a QSAR model was built for environmental toxicity evaluation and prediction of substituted benzenes with lipid-water partition coefficient and four quantum indices.

利用贝叶斯规整化神经网络研究了59种苯取代的环境毒性和分子结构的关系。建立了基于脂水分配系数和4种量子指数的QSAR环境毒性预测模型。结果表明：该模型的预测性能超过偏最小二乘法和逐步线性回归方法，残差分析显示其稳定可靠，有望成为一种良好的苯取代物毒性的环境评价和预测的方法

In the development of leukemia, methylation plays an important role in the genetic expression regulation and genetic structure stabilization.

在白血病的发展中，甲基化对基因表达的调控和基因结构的稳定起着重要的作用。

The control system includes detector circuit, protection circuit, control and man-machine interface circuit, which makes full use of DSP resources for high reliability and simplified the construction of system. The fifth section provides system software design, In order to read and maintain easy, a microprogramming modular is adopted. A new control strategy of Fuzzy voltage PWM combined Fuzzy angle control is realized for improving motor s working efficiency. At the same time, it simplify control model of SRM, reduce cost. At last, the result of experiment testify it, the electric machine gain success of simultaneous electrify two phase loop, the timing range is

第五部分为系统软件设计，采用模块化设计，增强了系统的可读性与可维护性；根据SR电机的特点，实现了模糊变角度电压PWM控制，避免了在单纯电压PWM方式下，电机高速时效率下降较大的缺点，也避免了在采用电流斩波与角度位置复合控制时方式转换所带来的弊端，同时也简化了控制，降低了成本；最后给出实验结果，实现了电机的双相稳定运行和良好调速，调速比达40：1。

Overall system is modular in design, function relatively independent modules, not only conducive to the stability and easy to maintain the system update.

系统整体采用模块化设计，各模块功能相对独立，既有利于系统的稳定又便于维护系统更新。

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％。