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当发光基团松弛，C15次甲基桥的两个二面角的扭曲是相反的。As the chromophore relaxes, the twist of the C15 methine bridge about its two dihedral angles is reversed.

结合计算行波和二面角散射的经验公式，计算了导弹整体的RCS。Combined with the equation of traveling wave and dihedral reflector, the RCS of total missile was calculated.

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根据切割需要，给出了用参数方程表示的各相贯线上的点坐标、二面角、切割角以及切割轨迹线的表达式。By the needing of cutting, the expression of dihedral angle, cutting angle and points in cutting trail can be given.

讨论了通过求作二面角的棱来求二面角的大小问题。The problem is discussed, that seeks the size of the dihedral angle by seeking to do the edge of the dihedral angle.

其结构中包含许多二面角螺旋，而且具有旋光性的异构体，其结构的整体骨架也构成一个大的螺旋。There are many helixes of dihedral angle, and the whole skeleton forms a large helix in the structure of the rotatory isomer.

飞行器翼身接合部构成的二面角反射器是很强的电磁散射源。The dihedral corner reflector with wing and fuselage joint of aircraft is a very strong electromagnetic source in a wide angular range.

最后还对各种影响因素如衍射、二面角误差和面形误差等也进行了分析。Factors such as diffraction, dihedral error, surface precision, which can influence the fidelity of the retroreflector array, are discussed too.

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本文以命题形式讨论无棱二面角的平面角大小的几种解法并加以证明和举例。In the form of propositions, this paper discusses several solution methods of the size of dihedral angles and proof and example are also offered.

他们将距离和二面角的约束效应运用在距离几何学和分子动力学的计算中使其对分子结构的测定更为精确。Distance and dihedral angle constraints are used in distance-geometry and molecular dynamics computations to calculate and refine these structures.

在分别考虑三种不同物质迁移机制作用下的双球模型中，通过引入二面角而完善的烧结模型可以精确计算烧结初期烧结颈的大小。The sintered neck can be calculated exactly in two-sphere model which was perfected by introducing the dihedral angle under three diffusion mechanisms.

通过对此数学模型的求解，导出了相交双管相贯线上各点局部二面角的计算公式，给出了相交双管装配接触线的参数方程，并解释了其数学本质。By the solution of the model, a calculating formula of the local dihedral angel of intersecting line and a parametric equation of contacting line are given.

使用该软件计算了圆形直腔、二面角和S形进气道的RCS，结果与其他方法吻合良好，具有比较好的计算精度。Finally, the RCS of a circle cylinder, a dihedral comer reflector and an S-shaped inlet is calculated, and the results demonstrate high accuracy of the proposed method.

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其主要散射源在头向为雷达天线或红外导引头，在侧向为弹翼之间的二面角以及弹身、弹翼。The major scattering resource in top direction is radar antenna or infrared head, in side direction is dihedral reflector formed by missile wings, missile body and wings.

通过对等效照明面积的分析，给出了能计算任意平面形状、有遮挡效应的二面角反射器后向雷达散射截面的工程方法。Through the analysis of EIA, a modified computational method is given, which can analyze a dihedral corner reflector with arbitrary shape of planes and with shadow objects.

对二面角电磁建模的分析和改进完善了二面角理论，增强了二面角模型在目标检测中的指导性。Analysis and improvement of dihedral angle modeling consummate the theory of dihedral angle model, and guidance value of dihedral angle model is enhanced in target detection.

给出了高维单形与界面有关的体积不等式和与二面角有关的体积不等式，进而建立正则单形的有别于定义式的体积公式。This article gives the volume inequality of higher dimension simplex about interface and dihedral angle, then sets up regular simplex's volume formula which differs from definition.

本文首先给出单形的不变量和它的切点单形的不变量之间的若干关系式，然后再给出一个关于单形二面角的不等式。In this paper, some relations of the invariants concerning the simplex and its tangent point simplex, are given and then, an inequality for the dihedral angles of a simplex is also presented.