导出方程

By applying maximum principle we can get the uniform boundedness of the corresponding viscosity solutions; Furthermore we exploit three groups of strong-weak entropy combinations to get the H l?

文中分线性源项和一般源项两种情形进行讨论，利用极值原理导出粘性解的一致有界性，通过强弱熵组合得到熵方程的Hl？

A detailed model of non-linear parametric excitation vibration coupling the stay cable and the girder, in which the static sag as well as the geometric non-linearity are considered, is proposed in this paper. Based on several numeric examples investigated by the Galerkin method composed with the integration strategy, several kinds of factors effecting stay cable parameter vibration are studied. Another parameter vibration model by the axial excitation is presented and the corresponding nonlinear equations are derived. The smallest excitation amplitude,the transient state and steady state resonance amplitudes, and the changing characteristics of the axial force are obtained by using harmonic balance method. According to numerical examples calculated by numerical integration method, the effects of the inner damping of the stay cables are investigated.

本文创新地提出了斜拉桥拉索-桥面耦合参数振动模型，推导了索-桥耦合非线性参数振动方程组，联合Galerkin法及数值积分方法，对各种特性的拉索进行了数值求解，得出了影响拉索参数振动的各种因素；提出了斜拉索受轴向端激励参数振动模型，导出了模型的非线性振动方程，使用谐波平衡法得出了产生参数振动需要的最小激励幅值、共振时瞬态及稳态的振动幅值及索拉力的变化特性，并用数值积分方法对实际斜拉桥拉索进行了计算，分析了拉索阻尼对参数振动的影响。

The economy and performance characteristics of LIYANG car equipped with CVT and MT are studied respectively and compared. 3Based on experimental analysis, the relation among the speed ratio changing rate, oil pressure of driving and driven pulley cylinders, driving pulley input speed and torque, metal belt speed ratio has been studied. Model for getting the ratio changing rate is put forward, and practical equation giving the ratio changing rate is obtained by experiments.

对装有CVT和装有MT的羚羊轿车的经济性和动力性进行了计算和比较分析。3）通过实验分析，研究了主、从动轮油缸压力、主动轮转速、输入转矩和带式无级变速传动速比与速比变化率的关系，建立了获取CVT速比变化率的模型，导出了符合实际规律的实用计算公式。4）应用键合图理论，建立了金属带式无级变速汽车传动系的键合图模型，推导了系统的状态方程。

The location equation of PSD output signal independent of light intensity was derived.

导出PSD的输出信号与光强无关的位置方程。

Firstly, a coupled mechanical and electric dynamics model consisting of theodilite and reaction wheels and considered mass eccentricity and friction moment is deduced from Lagrange-Maxwell equations.

文中首先由Lagrange-Maxwell方程导出了考虑质量偏心和摩擦力矩，包含经纬仪和反作用轮的机电耦合动力学模型。

This solution was expressed a function of offset, compressional and shear waves velocities, the traveltime of P-SV converted waves.

Schneider（2002）从一个关于转换点的三次方程中推导出了P-SV转换波转换点位置的一种解析解，这种解是偏移距、横纵波速度和P-SV转换波旅行时的函数。

Under the protection of nitrogen gas, the reaction system can induce polymerisation of acrylamide. A plausible mechanism involving free radicals has been proposed.

提出了一种含有自由基过程的反应机理，据此导出了一个能够解释本文全部实验事实的速率方程。

The optimal transfer trajectory equations of these two formation reconfigurations are proposed, and the relationship among the trajectory, the desired relative orbit, and the optimal impulses is shown.

在这些解析解的基础上，分别导出了前面两种编队重构的最优转移轨迹方程，揭示了最优转移轨迹与相对运动轨道及作用冲量之间的关系。

The regenerations adventitious bud was the better experimental materials compared with the callus of leaves.

不定芽的适宜诱变剂量为50~60Gy，由回归方程导出其致死剂量为122Gy，半致死剂量约为76Gy。

To coal sample in the outburst hole edge, we inferred double variable equations between σ〓 and volt V and pressure of methans P. Frequency, mineral matter, stack density, grain size and doping material would affect conductivity of coal.

对突出孔洞边缘样，导出了电导率与外电压V和瓦斯压力P的双变量方程；并讨论了频率、矿物质、堆密度、粒度和掺杂物对煤导电性的影响。

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。