成形的

Elastic cushion is usually used to suppress dimpling in the MPF process and its effect is obvious , but it also affects the precision of forming shape .

多点成形过程中的弹性垫技术是抑制压痕的有效方法，但是弹性垫的使用对成形件的形状也有影响。

The optimized weight is arrived by weighted the minimum variance distortionless response weights of these samples with their post probabilities. In addition, the samples with little post probabilities will be resampled and it improves the robustness of beamforming effectively.

在该算法中期望信号的波达方向被看成一个由若干样点组成的随机变量，利用后验概率对这些样点的最小畸变响应波束成形权值进行加权来取得优化的权值，并对小概率样点进行重采样，有效地提高了波束成形系统的鲁棒性。

The simulation results show that the forming force will be increased markedly by increasing the diameter of steel billet and the entrance half angle.

模拟计算表明，随着坯料直径的增加以及入模半角的增大会引起成形力显著提高；此外，键齿高度的增加及宽度的减小也会引起成形力增加。

In the field of metal forming, the study of workability or formability of material and defects during metal forming is the focus of researchers.

在金属压力加工领域内，金属材料的成形性能与金属在成形中的缺陷的研究一直是人们关注的课题。

It is essential to decide the reasonable heating parameters for ship hull plate forming system by pure line heating.

对于完全采用水火弯板成形船体板的情况，根据要加工形成的角变形量给出合适的工艺参数是水火弯板成形系统必须解决的问题。

Thus, the spherical-crown and saddle-shaped surfaces were demonstrated. Consequently, the basic rules and key technology of bending forming using plasma arc in practical work were obtained and the application level of the flexible forming using plasma arc had been further improved. The effects of the main parameters including power, scanning speed, scanning distance and scanning sequence had been investigated.

对成形中出现的棱角效应进行了机理分析和数值计算，结果表明棱角效应是板材沿扫描线方向受几何约束产生了较小的压应变及在扫描线上、下表面的收缩量不同所造成；提出了通过分段扫描解决棱角效应的方法，明显提高了成形质量。

And on the basis of analyzing the geometry characteristics of the side rail, the corners whose radius deteriorates the formability are modified.

重点对高强度钢纵梁内板的成形性进行了分析，并且在详细分析零件几何特点的基础上，对此模型的圆角半径进行了修改，修改后零件的成形性得到了显著提高。

The impact of the press displacement of the upper roller on the forming process of BBBR was studied and it was concluded that the lengthways curvature of the spherical part is very sensitive to the press displacement under fixed distance between two lower rollers. The effeet of friction condition on the forming process of BBBR was discussed. The springback behavior of the process was analyzed preliminarily. The simulated results were validated by experiments.

研究了上辊不同压下量对其成形过程的影响，结果表明：在一定的辊间距下，压下量的变化对球形件纵向曲率影响非常敏感，探讨了不同摩擦情况对成形过程的影响，对回弹进行了初步的分析，通过实验验证了模拟结果。

FLD is remarkabaly affected by the strain paths,which brings the inconvenience to industry.And the forming limit stress diagram which established with limit stress is independent on the strain paths and it is more convenient and practical to use as the criterion of forming limit under complex strain paths.

为确定板材拉伸失稳的成形极限，人们从理论和实验等方面提出了许多研究与评价方法，其中最有现实意义和应用最为广泛的是20世纪60年代由Keeler[1]和Goodwin[2]提出的以极限应变构成的成形极限图(forming limit diagram，FLD)的概念。

Work pieces contour show that the shape of free forming area could be represented accurately by circular function.

通过对成形件外轮廓的测量分析知，固体颗粒介质板材成形过程中，自由变形区的形状可用圆函数非常精确的表示。

I bought a nice wrist watch as a surprise for my wife's birthday.

我买了一个漂亮的手表想要给我妻子的生日一个惊喜。

We don t expect students to be sponges. You can t expect to absorb everything and not have any questions to ask.

我们并不期待我们的学生是一块海绵，你没可能接收所有的东西而不提出任何问题。