查询词典 bond angle

Through the computer simulation,analyzing the effects of pitch angle,roll angle,roll angle rate,sink rate,angle of attack and side angle on the track of ejection and save life height .

为提供弹射座椅多模态控制输入参数选择的理论依据，通过计算机仿真，比较分析了俯仰角、滚转角、滚转角速度、下沉率、迎角、侧滑角等弹射启动时飞机状态参数对弹射轨迹和安全救生高度的影响。

With the analysis of the bond structure of the film as deposited and annealed, we can infer that the increased content of cage structure comprised of Si-O-Si bond with bigger bond angle may be the reason of decreased dielectric constant.

薄膜经过400℃热处理后，其介电常数由3.85降低到2.85，对其FTIR谱的分析指出，薄膜中鼠笼式结构比例的增加可能是薄膜介电常数降低的主要原因。

Bond and angle types are assigned based on (1) atom types,(2) bond lengths or bond angles in the QM optimised geometry and (3) matching force constants derived from the Hessian matrix.

键和键角类型标记，依据（1）原子类型（2）量子优化几何学中的键长或者键角（3）源于 Hessian 矩阵的合适的力常数。

The structure of β-HMX,such as bond length,bond angle,dihedral angle,is analyzed theoretically.

实验和计算结果表明，在B3LYP/6-31G水平下的理论值接近β-HMX的X衍射实验值。

The change of bond distance and bond angle leads to the reduce of the symmetry, and makes the gap to be wider and shallow, and the gap does not change with the incident angle.

此键长键角的不归一特性的增大所带来的对称性降低导致了带隙变宽变浅和不随入射角变化。

The statistic results of ring,density,bond length,bond angle,dihedral angle and X-ray radial distribution functionof the models are given.

给出了模型的环、密度、键长、键角、二面角及X射线径向分布函数的统计结果。

Effects of helix structure disorder about the hydrogen bond length and helix angle on charge transport of Poly-Polyhave been studied. The results indicate that the hydrogen bond length disorder has a significant effect on charge transport,while the case is contrary in the situation of helix angle disorder.

在双螺旋结构无序中研究了氢键键长无序和螺旋角无序对Poly-Poly电荷输运的影响，结果表明：氢键键长无序对其电荷输运有重要的影响，而螺旋角无序对其电荷输运影响不大。

Optimal screw path length: The distance from the optimal entrancepoint to the optimal vent point Screw tail distance: The distance between left and right optimalentrance point Transverse section angle: Half of the included angle between left andright optimal screw Sagital section angle: The average of angle between both side optimalscrew with the upper terminal plate 1.2.2 Modify the threshold of CT value to distinguish the rear partof the lumbar, Observate the the optimal entrance point and the adjustable range.

1.2.2三维重建观察螺钉最佳进钉点的位置和各方向螺钉进钉点关系，调整CT值下限阈值使椎弓后部结构尽量显示清晰，以利观察。 1.3统计方法本实验采用SPSS13.0统计软件。对同一椎体左右两侧椎弓根螺钉相对数据行计量资料配对样本t检验，对男女组间相关数据行计量资料独立样本t检验，对男女组内不同腰椎节段间相关数据行单向方差分析及不同腰椎节段间LSD法多重比较。

Based on varying process of generator terminal parameters after excitation fault, shortages of excitation protective principle of static stability boundary and asynchronous impedance boundary are analyzed. It proposed that excitation fault research relates to large-disturbance stability. Because dynamic power-angle character of generator after excitation fault is non-sinusoidal, there are differences between dynamic power-angle character and static state power-angle character. So it isn't ideal to protective operation result based on small-disturbance stability and static stability boundary criterion. At the same time, it proposed that asynchronous boundary impedance criterion is a constant reactive power circle moving adown j Xd′. It can ensure complete loss-of-excitation generator measuring impedance enter into the circle, but can't ensure the other condition measuring impedance including impossible losing synchronism enter. So loss-of-excitation protection would be maloperation when system voltage drops short and recovers or generator rejects load.③Based on stability principle, it puts forward setting conditions and calculation method of generator loss-of-excitation protection by direct measuring power-angle.

以励磁故障后发电机端的相关参数的变化为基础，通过对以静稳定边界和异步阻抗边界作判据的两类三种现行励磁保护在原理上存在的缺陷分析，发现：励磁故障是一个大干扰稳定性问题，励磁故障后的发电机的动态功角特性与静态功角特性有很大的差异，已远非正弦曲线，因此基于小干扰稳定性原理、以静稳定边界作判据的保护必然动作不理想；异步边界阻抗判据是一个下移j Xd′的等无功阻抗圆，它可以保证完全失磁后的发电机测量阻抗能进入该阻抗圆，但不能保证完全失磁之外的其它状态不会进入该阻抗圆，因此在系统电压短时下降或发电机突然甩负荷等情况下可能启动该保护使之误动。

In this paper, a spark advance angle adjusting system is presented. In the system, spark advance angle of engine with carburetor on which spark controlled ECU is installed can be matched, the spark advance angle was real time adjusted according to engine different speed and load to find the ideal spark advance angle.

提出了一种具有调节点火提前角功能的控制系统，该系统能够在对化油器发动机进行简单改造加装点火控制ECU后对其点火提前角进行标定，对发动机在不同转速和工况下的点火提前角进行实时的调节，寻找到发动机在该转速和工况下的理想点火提前角。

The receding calculations and experiment analyses in this subject are built on the blood cast of pig tongue.

本研究课题的前期工作是采用猪舌血管铸型模拟人舌而进行的数值计算与实验分析。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&