参数方程

Based on this property, by solving a series ODEs we construct a two-parametric family of helicoidal surfaces under cubic screw motion with prescribed mean curvature or Gauss curvature and solve an open problem left by Beneki.

基于这一点，当螺旋面的平均曲率或Gauss曲率为给定光滑函数时，本文选取伪正交标架，使得两类螺旋面的平均曲率和Gauss曲率的表达式相对简化，通过求解一系列的非线性常微分方程，即可确定一族生成曲线，从而最终确定平均血率或Gauss曲率为给定光滑函数的双参数族螺旋面，并在这一过程中解决了Beneki等人留下的一个公开问题。

Secondly, through analysis of sensor magnetic circuit, we derived its sensor output equation and according to the ferromagnetism and the existing reference, we determined the sensor technical parameter.

其次，通过对传感器的磁路分析，推导出了它的感应输出方程。然后，根据铁磁学和现有参考资料，确定了传感器的各项技术参数。

Physical parameter substitutes for phase-changing latent heat, then critical temperature of thermal conductivity welding is determined, so finite difference equation can be solved by MATLAB software.

改变热物性参数替代相变潜热确定了热传导焊接的临界温度值，利用自编的MATLAB程序对有限差分方程进行求解，数值模拟了焊件的温度场。

The finite difference equation was built by using elemental energy balance of reinforced concrete beam with three surfaces exposing to fire based on the thermal properties of concrete. The influence of the physical or chemical reaction of free or combined water in concrete on the temperature field of concrete was considered by magnifying the specific heat of concrete.

根据三面受火钢筋混凝土梁离散体积单元的能量守恒原理，建立了有限差分平衡方程，在合理确定混凝土热工参数基础上，采用增大混凝土质量热容的方法，考虑混凝土中自由水与结合水的物理化学反应对混凝土温度场的影响。

In this paper, the finite point method is used to obtain numerical solutions of one-dimensional and two-dimensional inverse heat conduction problems with a source parameter, and the corresponding discrete equations are obtained.

本文利用无网格有限点法求带有源参数的一维和二维热传导反问题，推导了相应的离散方程。

While there has no control, the behavior of the system is discussed in Chapter 3. No defines in the point (0,0) of the system brings much difficulties in the research on the kinetic nature near (0, 0). By applying the series theories and methods in the literature on the singular point of nonlinear equations, we solve this problem satisfactorily and give the all possibility of the orbits of the system converging (0,0) as t→+∞ in the First Quadrant.

因为系统在(0，0)点处没有定义，这给研究其在(0，0)附近的动力学性质带来了困难，我们应用文献中关于研究非线性方程奇点的系列理论和方法，圆满解决了这一问题，给出了第一象限当t→4+∞时，在全参数状态下系统的轨线趋于(0，0)点的所有可能情况。

A series of phaseinversions were observed: WinsorⅠ(?→Ⅲ(3)→Ⅱ(?, when increasingδat constantγin the fishlike phase diagram. Some, physicochemical parameters can be calculatedby HLB plane equation.

从δ-γ"鱼状"相图观察到随体系中醇浓度的增加AEO-9微乳液的相态发生一系列变化WinsorⅠ(2)→Ⅲ(3)→Ⅱ(2)，通过该相图的亲水亲油平面方程求得一些物理化学参数。

A detailed analysis of Schulz—Flory distribution has been given and a calculation method for growth rate and termination rate of Chain in Fischer Tropsch synthesis is presented here.

经过对Fischer—Tropsch合成产品分布和Schulz—Flory方程的研究与分析，、提出了对决定F—T合成产品分布的重要参数——链生长几率、链生长速率及链终止速率的直接计算方法。

The interaction parameter of POM and Novolak was calculated by Hoffman-Weeks' equilibrium melting point method and Flory equation.

DSC测试表明， POM与Novolak共混后，共混物的熔点下降；通过DSC测试得到数据，采用Hoffman-Weeks平衡熔点外推法和Flory熔点下降方程推算出POM与Novolak的相互作用参数

A detailed analysis of Sehulz—Flory distribution has been given and a calculation method for growth rate and termination rate of Chain in Fischer Tropsch synthesis is presented here, Calculation method was based on experiment data and the development doesn't need to be confined by postulating mechanism.

经过对Fischer—Tropsch合成产品分布和schulz—Flory方程的研究与分析，提出了对决定F—T合成产品分布的重要参数——链生长几率、链生长速率及链终止速率的直接计算方法。

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。