concave curve

It is found that heat transfer coefficient increases with fin height, while flow resistance varies as concave curve, that is to say, the resistance reaches the lowest value at a middle fin height.

结果表明，随着流道内翅片高度的增大，传热膜系数随之增大，但流阻曲线则呈凹型变化，即在中间高度时流阻达到一最小值。

The paper analyses the distribution regulation of air cushion field press and press grade in convex curve and concave curve of air cushion belt conveyor and discusses the curve radial R1 and the effect of belt tension on air cushion field major factors.

本文分析了气垫带式输送机在凸凹弧段运行时，气垫场的压力、压力梯度的分布规律，并讨论了凸凹弧段曲率半径R1，胶带张力对气垫场主参数的影响。

It can complete variable angle continuously placement, form concave curve surface, change the width of fiber belt.

它可以实现连续变角度铺放，并可成形凹曲面，且纤维带宽可变化。

It researched on a practical project based on the design theory educed before, ascertained the radius of convex curve with alterable angles and concave curve with alterable angles, finished the design of disposal structure.

根据所研究出的设计理论，进行一项工程实例的设计研究，确定该实例的凹变坡和凸变坡转弯半径，完成转弯段布置结构设计。

The diurnal variation of WUE was a concave curve with the highest in the morning, the lowest at noon and high in the afternoon.

杏各品种的WUE日变化总体表现为上午最高、中午最低、下午较高的凹型曲线，但品种间在曲线变化和日均值方面也存在差异。

The research result showed that: With the increase of distance from shield tunnel central axis, the initial excess pore water pressure decreased in a concave curve shape.

分析表明：随着离隧道中心的径向距离增加，土体各点的初始超孔隙水压力呈凹曲线衰减。研究了隧道埋深、盾构直径对土体初始超孔隙水压力的影响。

Single cam linkage mechanism can overcome the shortcomings mentioned above, however the new problem is that the mechanism can not generate the path which has concave curve.

单凸轮连杆组合机构可克服上述缺点，即可以方便地再现预定轨迹并有精确解，但其缺点是难以实现内凹曲线的轨迹复演。