方位角的

In the passive estimation of mobile target track, the stationary ground platform only provides angular information but no distance information.

在地面固定单站对机动目标的无源轨迹预测中，地面固定单站仅提供目标方位角和高低角信息，而没有提供目标距离信息。

A new algorithm, based on uniform acceleration and constant altitude flying mode hypothesis, is presented to estimate the mobile target track according to the measured angular information.

在无测距信息的情况下，根据匀加速运动和等高飞行2个弱条件假设，提出了仅利用测角系统测得的空中机动目标的高低角和方位角进行目标飞行轨迹预测的算法，并对算法进行了仿真测试。

In order to tr a nsform conveniently the direction a l a ngle of a geodesic line into the geodetic a zimuth,the solution of the meridi a n a l convergence is expressed by geodesic coordin a tes of this point.

该解式直接采用该点的测地坐标来求解子午线收敛角，从而能方便地将测地坐标系中任一大地线的方向角转换为大地方位角。

Choosing Huzigou as the experimental site, the elevation, azimuth, hour angle and so on of the surrounding undulating terrain was measured. The solar visual orbit map was developed and the solar visual orbit equation was applied to calculate the solar elevation angle of morning shelter and dark shelter and the sunshine hours.

方法］选择户子沟为试验点，实地测量周围起伏地形的仰角、方位角、时角等，绘制太阳视轨道图，应用太阳视轨道方程，计算出晨蔽、昏蔽太阳高度角，进而计算出日照时数。

Based on constraints to angle-of-fall for cruise missiles, the variable structure terminal guidance law was designed for limiting the angle of fall in longitudinal and lateral directions. Thus the missile can be kept in desired azimuth and angle-of-fall for attacking the target efficiently.

针对巡航导弹落角限制的要求，分别对纵向和侧向两个通道设计出了限制落角的变结构末制导律，可以使导弹在期望的方位以期望的落角打击目标。

On the cloudy day, a very little diurnal difference was found in azimuth, directional and midrib angle.

而在阴天，阳生叶和阴生叶方位角、方向角和中脉角的日变化均很小。

We investigated the receiver functions in a horizontally-layered medium with arbitrary oriented hexagonally symmetric anisotropy, and discussed the phenomenon of shear-wave splitting and energy deviation in an anisotropic medium. The anisotropic structure yields patterns of receiver function amplitudes and arrival times on both the radial and transverse components that are a systematic function of source-receiver back azimuth. We also investigated the influence of varying anisotropy parameters, e.g.

采用具有任意方向对称轴的横向各向同性介质系统，探讨了各向异性介质中接收函数表现出的横波分裂、能量偏离等特征，并系统剖析了各向异性介质对称轴方位角、倾角以及各向异性层位分布对接收函数方位变化花样的影响。

For improving the survivability of the guided weapons in target district,aggrandizing its damaging power to target,and to satisfy the demand of the actual military tactics,the guided weapon must attack targets in the desired impact angle,thus the problem of homing guidance with impact angle constraints is put forward.

为提高制导武器在目标区域的生存能力，增大对目标的杀伤威力，以及实际战术应用的需要，需要武器按期望的方位角、俯冲角对目标实施攻击，因此提出了带有碰撞角约束的导引问题。

The comparison analysis of narrow anti wide azimuth seismic data in mountain front areas of Turpan Basin, western China, shows that the observation direction bevelling the direction of faults or fault zones will cause the imaging loss of small faults, and the little fault will be poorly imaged in seismic data.

通过对中国西部吐鲁番盆地北部山前带的宽、窄方位角地震数据进行对比分析研究表明：不同窄方位观测时，由于观测方向与断裂走向斜交存在较为严重的构造假象，并造成小断层难以成像。

For unexploded ordnances, the four dimensional unexploded ordnance scattering function of slant range, azimuth, frequency and aspect angle is firstly estimated via the SWD. Secondly, the amplitude information of the multi-aspect feature in different frequencies is extracted, and the spatial distribution information of multi-aspect feature in different frequencies is quantitative described using the Hu moment invariants further.

对于未爆物目标，首先利用SWD得到未爆物斜距-方位-频率-方位角四维散射函数估计，然后在提取了不同频率下的多方位特征幅度信息的基础上，利用Hu不变矩进一步定量描述未爆物不同频率下的多方位特征空间分布信息。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。