查询词典 polyhedral angle

During the lateral parabolic profile was computed,numerical methods of calculating angle of inclination on initial point of the lateral paracurve and calculating angle of inclination based on interval length were analyzed.It is pointed out that the key of the lateral parabolic profile design is a circular function equation which can be applied to solving the angle of inclination on initial point of the lateral paracurve.

对侧位抛物线剖面设计求解过程中的求侧位抛物线初始点井斜角的数值方法和从段长求井斜角的数值方法进行了分析，指出其关键是求解侧位抛物线初始点井斜角所满足的一个三角函数方程。

Based on the definition of benchmark angle and compensation angle,the algorithm of roll angle of projectile in fire plane is brought out and the calculating error is analyzed.The simulation is carried out for the swing of projectile and the measurement of geomagnetic signal error.

将弹丸的滚转角分解为基准角和补偿角，给出了处于射击平面内的弹丸滚转角解算方法并进行了误差分析，针对弹丸的摆动及地磁信号测量误差进行了仿真。

Then, aerodynamic parameters in different flight conditions are used to imitate the uncertainty of the system, and the digital simulation of closed-loop system designed is performed. The results show that the system can accomplish asymptotic decoupling of roll angle, sideslip angle and head-on angle for aircraft, and the system is provided with the function for restraining uncertainty in the system. This illustrates that the flight control system designed has not only good decoupling characteristic, but also better robustness.

然后用不同飞行条件下的空气动力参数变化来模拟系统的不确定性，并进行闭环系统数字仿真，结果表明，所设计的控制律不仅可实现对飞机滚转角、侧滑角、迎角等的渐近解耦控制，而且对系统不确定性具有较强的抑制作用，说明系统具有较好的解耦性和较强的鲁棒性。

The system can automatically seek north when the vehicle is immobile. And the time consumption is no more than 5.5 min. Besides, the system can keep azimuth angle and provide tilt angle and pitch angle of the vehicle.

本系统可以在车载条件下，停车完成自动寻北，寻北时间小于 5.5min；本系统还具有在机动时进行方位保持、实时提供载体倾斜角和俯仰角等功能。

Firstly, the control of reentry phase and the model of RCS jets are presented. Then the flight control system is divided into two subsystems based on the time-scale separation principle. The fast states subsystem corresponds to the three body-axis angular rates, the slow states subsystem controls the angle-of-attack, sideslip angle and the rate of the bank angle about the velocity vector. Lastly, the proportional-plus-integral feedback is designed to increase the system robustness.

首先，分析了SRLV再入段的数学模型，并给出了反作用推力控制系统的控制模型；其次，将非线性动态逆方法与时标分离原则相结合，考虑飞行器姿态控制系统的外环角回路的慢变特性和内环角速度回路的快变特性，独立设计了两个回路的控制律；最后，为了增强系统的鲁棒性，分别在两个回路中引入了比例－积分反馈，有效地抑制了干扰力、力矩和非线性对消带来的逆误差。

A method to measure the absolute velocity is developed in a spectral domain ODT system,where Doppler angle is determined by combined information on the measured Doppler shift and Doppler bandwidth,and then the flow velocity is determined from Doppler angle and Doppler shift.

发展了基于谱域ODT技术的绝对速度测量方法，该方法综合运用多普勒频移和多普勒展宽信息实现多普勒夹角的确定，进而实现流体绝对速度的测量。

The parameters optimization design model is proposed, which is based on a control model with the quasi-Euler angle, Euler angle velocity and absolute angular velocity as the feedback. The vibration-resistance parameters of the given controller are chosen as the optimization variables, and the on-off times of the engines is chosen as the optimization objective function.

基于一类采用拟欧拉角、拟欧拉角速度和飞行器绝对角速度为反馈信号的姿态机动控制模型，以其消振参数为优化变量，开关次数为优化指标，建立了姿态机动参数优化模型。

We have swept the world in 3D adventure game "Tomb Raider 2" in the graphic as an example, in Figure 1 due to the closure of a 3D accelerator card on the "Perspective angle amendment" function, the stone figures of the ground stations at a severe bend lines deformation; and plans to open a 3D II Accelerator on "Perspective angle amendment" feature, stone ground lines should be maintained and the actual results.

我们以风靡世界的3D 冒险游戏《古墓丽影2》中的图形为例，在图一中由于关闭了3D 加速卡上"透视角修正"功能，人物所站的石板地面线条出现严重的弯曲变形；而图二中打开了3D 加速卡上"透视角修正"功能，石板地面线条便保持了真实的效果。

Results:Sharp angle was decreased and acetabulum forward rotation angle increased in two kinds of osteotomy.

结果：两种截骨方法术后Sharp角均减小，髋臼向前旋转角度均增大，统计学上有显著差异(P＜0.05)。

When thecohesion and angle of internal friction is fixed ,the layer failure area becomessmaller with increase of shocrete layer's thickness.also the shotcrete layer has acritical thicknesswith the change of cohesion and angle of internal friction ofshotcrete'sinterface.

初喷接触面粘聚力和摩擦角强度一定时候，初喷破坏区随初喷厚度的增加而减少；接触面强度变化时，初喷存在一临界厚度；初喷破坏区主要集中在节理与洞周的相交处。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。