条件观测

For example, when observation station must coincide with VLBI or SLR station, GPS antenna can't be installed to the sigh board's center of these stations, and under this special circumstance, decentration of observation must be a-dopted..

由于种种条件的限制，在很多情况下GPS天线都无法实现真正的对中，在某些特殊情况下，例如观测站必须与VLBI站或SLR站重合，而又无法在这些站的标志中心安设接收机天线，这就要求进行GPS偏心观测。

Considering the limits of RDSS in active positioning mode,such as poor security,limited capacity,and inability to continuously provide position,velocity and attitude outputs,a technique of tightly coupled RDSS /SINS integrated navigation system is proposed for land vehicles by utilizing the time differenced carrier phase of 3 geostatic satellites.

针对北斗系统有源定位方式保密性差、用户数目有限，不能提供连续的位置、速度、姿态信息的问题，提出利用北斗系统3颗地球静止卫星的载波相位时间差分信息，与车载捷联惯导构成紧组合导航系统，通过扩展卡尔曼滤波器估计并修正惯导系统的速度误差；引入载体的侧向和天向速度约束，改善了速度估计精度；结合北斗系统的伪距信息，消除了长航时条件下位置误差的积累；推导了滤波器观测方程，对组合导航滤波器进行了设计；通过车载实验进行了验证，实验结果表明，速度误差和位置误差的积累受到了有效地抑制，精度满足陆地战车导航的要求。

In this paper, based on the data of flume experiments and field engineering, the indicial method of dimensional analysis is compared with the method based on energy equation. the characteristics of the two methods are analyzed and the application conditions are put forward. this research can provide evidence for method selection of radial gates hydraulic calculation or calibration.

通过弧形闸门的实验室水槽数据和现场观测数据，将传统的基于能量方程的方法和量纲分析的表征方法进行了比较，在分析了不同方法的特点的同时，指出不同方法的应用条件，为闸门水力计算和校准等计算方法的选择提供了依据。

Both seismological theory and macroseismic observation show that the shape of strong motion response spectrum depends mainly on magnitude,distance of epicenter and engineering site condition.since it is considered just the effect of engineering site condition and epicenter distance of only site condition to determine the characteristic period of acceleration response spectrum in the antiseismic design criterion of our country at present,the characteristic period of response spectrum determined from those critetion is different from that got from special seismic hazard analysis.

地震学理论和强震观测都表明，强震反应谱的形状主要取决于震级、震中距和场地条件。由于我国现行的各种行业建筑物抗震设计规范中对标准加速度反应谱特征周期Tg作出的规定中一般只考虑场地和震中距的影响或只考虑场地影响，因此在某些情况下，由规范所得到的反应谱特征周期与由专门的地震危险性分析所得到的结果相差较大。

In the experiments, detection rate and reaction time were measured to evaluate the visual performance of human eyes at three mesopic light levels0.01, 0.1 and 1 cd·m~(-2 with targets of two visual angles (10 and 2°) at two observing eccentricities (0°, 10°). There generated more than 30,000 single measured data and analysis with statistical and computer methods were done.

本论文的实验选用了探测率和反应时间作为评价人眼在中间视觉状态下视觉功能的主要参数，分别在3组典型的中间视觉亮度作为背景亮度0.01，0.1和1 cd·m~(-2和2组不同视场角的目标(10'和2°)以及2组不同的观测偏心度(0°，10°)条件下，先后在中国和德国进行了30，000多个数据采样，并运用计算机技术进行统计分析和研究。

The moveably suspended cableway is an innovational method compared to traditional methods. It can be used to solve the problems of depth measuring with complicated water flow. Therefore, it provides an important example for hydrological observation under special conditions such as river-closure for power station.

移动式缆道，是基于传统水文缆道的改进，它解决了复杂水流条件下的水深测量问题，同时为电站截流等特殊情况下水文观测提供了重要借鉴。

Based on the simulated multispectral and multiangular satellite measurements, we analyzed the sensitivity of different wavelength and satellite view.angle to the retrieval of the aerosol optical thickness and effective radius.

2利用Mie散射和大气辐射传输模式模拟了一个给定条件下的卫星多视角、多波长的辐射观测，分析了各通道之间可用于气溶胶光学厚度和粒子有效半径反演的敏感性。

This phenomenon which is similar to liquid is validated under normal temperature and pressure on the surface of pure metal, alloy, mylonitic quartzite, gabbros et al. using metallographic microscope, TEM, SEM, AFM and X-ray diffractometer based on preceding researchers. The phenomenon reveals a new matter existence state in non-extreme arduous conditions, besides the well-known states, gas, liquid, solid and liquid crystal.

本文在前人研究的基础上，采用金相显微镜、透射及环境扫描电子显微镜、原子力显微镜和X 射线衍射仪等观测仪器，对纯金属、合金和非金属材料糜棱状石英岩、辉长岩等进行观察，验证了在常温常压下，这些材料中存在着一种未被人们认知的，具有类似流体特征的非线性振荡现象——&类流态&现象，是一种非极端条件下新的物质存在状态。

Under the condition of varying , the ratio between noise levels in local sensors, this dissertation derives the analytic expression of performance of the centralized OS-CFAR detection for and local signal-to-noise ratio in nonhomogenous background.

本文在局部传感器背景噪声功率水平间的相对比例系数变化情况下，推导出了集中式 OS-CFAR 检测在且局部观测信噪比条件下在非均匀杂波背景中检测性能的解析表达式。

After comparing the obtained data with those of olive tree original producing area , using climate similarity theory , the index for Olea european suitable planting division was established .

对油橄榄园定点观测试验资料以及采用气候相似原理与原产地和国内引种地的气候生态条件对比分析，探讨白龙江沿岸油橄榄气候生态适应性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。