查询词典 concave angle

Cosine law of spherical triangles : in the spherical triangle , either side of the hot core corresponding to the cosine of angle equal to each other on both sides of the corresponding hot core product with the cosine angle on both sides of each angle of the sine and the corresponding spherical center piece of any side in the spherical triangle in ...

球面三角形余弦定律：在球面三角形中，任意一边所对应球心角的余弦等于其他两边各自对应球心角的余弦乘积加上这两边各自对应球心角的正弦及任意的那条边在球面三角形中。。。

Sine Cosine】【cotangent side: angle: side: angle: type of half-angle formula.

边： 角：边：角：边：角：式中。

It occurs when the angle of incidence is greater than a certain limiting angle, called the critical angle.

当入射角大于某个称作临界角的极限角时，便发生全内反射。

Human-triggered avalanches have the greatest incidence when the snow's angle of rest 1 is 8 between 35 and 45 degrees; the critical angle, the angle at which the human incidence of avalanches is greatest, is 38 degrees.

当积雪的休止角在35度到45度之间时，人类触发的雪崩具有最在的危险性。人类引起雪崩的临界角是最大的，是38度。

Angle of view: With 60 degs. apparent angle of field, the DF and the IOR are the only wide angle binoculars in this test.

视角：在本评测中，DF和IOR有60度表现视场，是仅有的广角望远镜。

Angle of view: These are low light binoculars and one should not expect excessive wide fields of view. Closest to 'wide angle' comes the IOR with 60 degs. apparent angle, which is sufficient to avoid the tunnel-view of its contenders.

视角：这些都是低亮度望远镜，不能期望有极宽广的视角，最接近"广角"的当属有60度表现视场IOR，远离了只有管窥视野的其它两款。

The forward kinematics is analyzed by choosing one of the mechanisms which have one, two,three or zero angle constraint.Wherein,3-CCC is a new parallel mechanism which has three angle constraints and three distance constraints, Calay\'s formular and direction cosine matrix are used to describe the rotation matrix respectively.By setting Dixon\'s and Sylvester\'s resultant with the three angle constraint equations respectively and using parameters replacement to deal with the distance constraint equations,the 64 order input-output equation of the forward kinematics is obtained under both of the methods.Numerical example confirms these theretical results and the motion simulation is shown in VC++ by integrating OpenGL.

3对高小山提出的广义并联机构进行了研究，以其中具有角度约束的并联机构进行了分析，选取具有一个、两个、三个和零个角度约束类型中各一个机构进行了运动学正解求解，其中3-CCC是一种全部由圆柱副构成的具有三个线线角度和三个距离约束的新型并联机构，文中分别用Calay公式和方向余弦两种旋转矩阵建模方法对其位置正解进行了分析，通过对三个角度约束方程分别构造Dixon结式和Sylvester结式，以及对三个距离约束方程进行变量代换分别导出了位置正解输入输(来源：4040ABC论文网www.abclunwen.com)出方程，得出64组位置正解，并使用数值算例验证了其全部根。

The iris radius of 60 (93 eye) patients with early pupillary block primary angle closure glaucoma was measured with this method, it showed:(1) there was a statistically significant difference in iris radius between the patients with early stage primary pupillary block angle closure glaucoma and the normal subjucts (53 cases 106 eye) with the age matched group (P.01),(2) it is proved with the stepwise discriminatory analysis that the iris radius-the most significant bio-anatomic parameter of the anterior segment is usefull to diagnose early primary pupillary block angle closure glaucoma by stepwise discriminatory analysis.

本研究用此测量法测量了60例93只眼早期原发性瞳孔阻滞性闭角型青光眼的虹膜曲率半径，发现：（1）早期原发性瞳孔阻滞性闭角型青光眼患者的虹膜曲率半径小于同年龄正常人（53例106眼）的虹膜曲率半径，其差异具有显著性统计学意义（P.01）；（2）经多因素逐步判别分析证明本研究所提出的活体眼前节解剖学测量参数——虹膜曲率半径有助于原发性瞳孔阻滞性闭角型青光眼早期诊断。

The use of ANSYS finite element software to establish a large-scale Decanters double cone angle of the two-dimensional finite element model of the drum to its normal working condition in the overall structure of static analysis, has been the drum of the radial, axial deformation and stress distribution and maximum stress points, results show that the double cone angle drum strength and stiffness to meet the requirements to verify the safety of the structure of double cone angle.

利用ANSYS有限元软件建立了大型卧螺离心机双锥角转鼓的二维有限元模型，对其在正常工作状态下的整体结构进行了静力分析，得到了转鼓的径向、轴向变形和应力分布及最大应力点，结果表明双锥角转鼓的强度和刚度均满足要求，验证了双锥角结构的安全性。

In order to achieve the setting up angle should be monitored and debugged, a new approach is brought up. With the CCD receiving the focusing spot of parabolic mirror, while rotating the parabolic mirror, collecting the focusing spot location information, the eccentric angle between the optical axis and the structural central axis could be found. System principle and design have been studied.The experimental results meet the need to test and monitor to the setting up angle of the discal parabolic mirror.

为了实现对抛物面反射镜的装配角度进行监控和调试，提出了一种通过CCD接收回转抛物面镜的聚焦光斑，同时旋转抛物面镜，采集光斑重心位置信息，从而计算出光轴与结构中心轴之间的偏心角的实现方案，并从方案原理和设计上对其进行研究和实验，实验结果证明该系统能应用于对盘状抛物面反射镜装配角度的测试和监控。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48