查询词典 back surface

The back-propagation neural network was applied to modeling the primary mirror surface with inputs of actuator applied force and outputs of Zernike polynomial coefficient. By using primary mirror finite element analysis data, BP model was trained offline and its predictive precision was verified.

应用BP神经网络的方法建立了以致动器作用力为输入、镜面形变的Zernike多项式拟合系数为输出的镜面形变模型，并利用镜面形变的有限元分析的大量数据，对BP模型进行离线训练和模型预测效果的检验。

Originating the water ascends to drag along to take, porterage etc. activity, its development process has something to do with 蛙泳 with free 泳.Appear in 1794 the relevant human body lie on the back the surface, two arms row the water backward in the side, two legs do the 蹬 of the 蛙泳 clips the operative writing jots down, so have the " versa 蛙泳" or" breast-stroke swimming backstroke" at the beginning it call.The 1902 lead the free the technique of 泳 into the backstroke,1912 the United States athlete 赫 cloth 纳 H.

起源于水上拖带、搬运等活动，其发展过程与蛙泳和自由泳有关。1794年出现有关人体仰卧水面，两臂在体侧向后划水，两腿做蛙泳的蹬夹动作的文字记载，故最初有"反蛙泳"或"蛙式仰泳"之称。1902年将自由泳技术引入仰泳，1912年美国运动员赫布纳

Fig. 3 illustrates the surface prole that is obtained by front and back cutting for a depth of cut of 0.5 mm, spindle speed of 750 rpm and feeds from 0.4 up to 1.0 mm/rev.

图。 3说明了表面轮廓是获得正面和背面切割的切削深度为0.5毫米，主轴 750转的速度和饲料由0.4上升到1.0毫米/转。

Secondly, the athletes should adopt the vibration training method or the strength training method with unstable supporting surface.Because these two methods can not only activate motion element which couldn\'t be activated in most of time,but also add up the harmonization of the nerve muscle and make the proprioceptor trained.Thirdly,we should make or choose special archery shoes which have slip-resistant sole and suitable degree of bend in the front and back,suiting for the competition ground and adding Up the stability,fourthly,we should properly pay attention to the stage of lifting.

因为这两种训练方法不仅可激活多数情况下不能激活的运动神经元使力量增加，而且可增加神经肌肉的协调性，同时也使本体感受器得到训练，从而增强对射箭动作的感觉能力；第三，为射箭运动员定制或选择有防滑块鞋底、前后上翘程度符合运动员脚型特点的射箭专用鞋，既可以适合比赛地面特点又能增加稳定性；第四，适当重视举弓阶段的训练。

Firstly, radial horizontal component and transverse horizontal component are derived from tri-channel seismic data at the surface and the bedrock in borehole array by back-azimuth decomposition method, and the histories of radial and vertical components are divided into two parts by Sg wave arrived time. Moreover, it is supposed that transverse horizontal components are made up of SH wave, while vertical component and radial horizontal component are constituted by P-SV wave system.

针对钻井台阵的两处三分量加速度记录，根据反向方位角将两水平分量分解为径向水平分量和横向水平分量，假设横向水平分量由SH波系组成，竖向分量和径向分水平量由P-SV波系组成。

The Undo function is that comforting rope ladder to the surface, supporting a user's willingness to explore further by assuring him that he can back out of any dead-end caverns.

撤销功能将绳梯放在地上，让新用户确信能够从闭塞的洞穴里返回，进一步支持用户探索的意愿。

Rotisserie cooking alternates high and low heat many times: as the meat turns on the spit, each area of the surface is briefly exposed to high browning heat, then given time for that dose of energy to dissipate, part of it into the meat but part back out into the cool air.

电热轮转烤肉器轮换用高、低火多次：肉在烤肉叉上旋转的时候，其表皮的每个区域都暴露在使其变焦脆的热度下，然后等这股热度消散，一部分热能进入肉里，一部分又回到周围温度相对低的空气里。

Results show that , be compared with the traditional meshing scheme of sabot, after adopting the new scheme, the stress of the dangerous tooth surface of back push sabot can decrease at least 30% and at least 13% of the front push sabot.

结果表明，与传统弹托的啮合方式比较，采用新的啮合方案后，后推式弹托危险齿根面的最大等效应力值减少了30%以上，前推式弹托危险齿根面的最大等效应力减小了13%以上。

The rider must also be placed centrally in the saddle seat to allow perfect balance, and free movement, and to maximise the bearing surface on the horse's back.

骑手还应该保证坐在马鞍的中心部位，这样才能保持最佳平衡状态，行动自如，同时最大限度地分担马背的压力。

2Nd east of the ladder, above sea level back to the land surface of the third grade ladder, elevation 500 meters, mainly hilly and plain.

第二阶梯以东，海平回以上的陆面为第三级阶梯，海拔在500米以下，主要为丘陵和平原。

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。