变宽

By means of the complex variable function method and introducing the conformal transformation,the plane elasticity problem about static crack of a finite width strip with a single edge crack is analyzed further and the exact solutions to the SIFs are found out and generalized to dynamics.

利用复变方法，通过构造适当的保角映射，分析了有限宽单边裂纹带中静态裂纹的平面弹性问题，给出应力强度因子的精确解，并将其推广到动力学。

Onlyadjusting outside resistance and the capacitance value, not only it may obtain the contravariant frequency which we need, moreover it may adjust the dead time, like this wemay realize to adjust the pulse width neatly.

调节外接电阻和电容值，不但可以获得所需的逆变频率，而且可以调节死区时间，这样可以实现对脉宽、周期的灵活调节。

The grids can be densified locally where the flow is complicated for the sharp change of water depth.(5) 2-D hydrodynamic equations in the generalized curvilinear coordinates have been derived with the contravariant velocities as main variables. The new equations keep the original styles and physical meanings. Based on the water depth correction method, the 2-D flow numerical model has been established and validated by the measured data.

推导了广义曲线坐标系下以逆变流速张量作为主变量的二维水动力方程，新方程保持原有结构形式及物理含义，采用水位校正法建立了二维水流数学模型，经实测资料验证后的模型，模拟并分析了分流角度、宽深比等因素变化对分汊流平面二维水流结构的影响。

Evaporating fan Automobile air-conditioner Asynchronous motor Contravariant device SPWM

蒸发风机；汽车空调；三相异步电动机；逆变器；正弦波脉宽调制

For a long time, it is a main factor to hamper the real-time application of SHET. The research is carried on aiming to quickening convergence speed. The automatic-changing Homotopy algorithm is proposed in the dissertation. The algorithm, which can change the solving method based on fundamental component, has the advantages of large convergence domain, high convergence rate and high precision. Many trigonometric functions are contained in the mathematical model, during solving equation, the calculated speed and the precision are affected by the calculations of trigonometric functions.

特定谐波消除技术的数学模型是一组非线性方程组，长期以来，方程的求解一直是限制该技术实时应用的关键因素，本文针对特定消谐方程组的快速求解进行细致的研究，提出自动变同伦算法，该算法可根据基波幅值的取值范围来决定采用的求解方法，其对求解方法的可选择性使该算法与其它算法相比具有计算速度快、收敛域宽、计算精度高等优点。

It appeared to be about 30 feet wide with a disc-shape apparent, when lights on it dimmed.

这似乎是约30英尺宽的圆盘形状明显，当灯它变暗。

Near the end of the movie, the base of the dust devil becomes much wider.

在影片的结束部分，旋风的基部变得很宽。

The use of crutches had made his torso and arms as broad as a galley slave's, but his defenseless legs looked like an orphan's.

使用拐杖把他的躯干和臂膀变得像苦役犯一样宽实，但两条无助的细腿看上去像孤儿的一样。

However, this modulation mode would not prevent the injection of DC current into the grid.

在双极性脉宽调制方式下，全桥逆变器的共模电压恒定，不产生共模电流。

Gynobase flattened-fastigiate or semiglobose to 1 mm, wider than tall at base.

Gynobase变平帚状给1毫米的或半球形，比高的在基部宽。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。