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The simulated results after the assimilation show that it is the best to perform the intensive radiosonde observation in the upstream of the rainfall area and the moisture passageway area at the same time to improve the heavy rainfall forecast.

从个例研究结果来看,在同化时间窗都为12小时的条件下,使用加密探空观测资料进行三个时刻的数据同化形成的初值明显优于同化两个时刻的观测资料形成的初值。

There are people believe that the ancient Chinese form was originally a concept-day geodetic instruments, Spring and Autumn Period there is a instrument for the observation of astronomical tables, people standing tree as a pole in order to determine the length of the sun's shadow position, solar terms, and thus to measure the star, observable sidereal year cycle, the ancient pre-construction in the construction, but also as a method to take positive positioning.

还有人认为,古代的中国形式的概念最初是天大地测量仪器,春秋有一个表的天文观测仪器,人们站在一个极树,以便确定太阳的阴影位置长度,节气,从而测量恒星,观测恒星年周期,古代前在建筑施工,但作为一种方法也采取积极的定位。

And three main steps of all subspace algorithms are explored. First, using an LQ-decomposition, the projection of the row space of specific data Hankel matrices is calculated. Next, the SV-decomposition of the projection is calculated to directly lead to the observability matrices and a Kalman filter estimation of the state sequences.

概括了子空间辨识算法的三个主要运算步骤:首先由LQ分解计算特定Hankel矩阵的行空间投影;再对该投影进行SVD,获取系统的可观测矩阵及状态序列的Kalman滤波器估计;最后由可观测矩阵和/或估计的状态序列确定系统矩阵。

And three main steps of all subspace algorithms are explored. First, using an LQ-decomposition, the projection of the row space of specific data Hankel matrices is calculated. Next, the SV-decomposition of the projection is calculated to directly lead to the observability matrices and a Kalman filter estimation of the state sequences. Last, the system matrices are extracted from the observability matrices and/or the estimated state sequences.

概括了子空间辨识算法的三个主要运算步骤:首先由LQ分解计算特定Hankel矩阵的行空间投影;再对该投影进行SVD,获取系统的可观测矩阵及状态序列的Kalman滤波器估计;最后由可观测矩阵和/或估计的状态序列确定系统矩阵。

So, with the principle of lowest general energy-consumption for completing observation task, we figure out a kind of greedy heuristic algorithm, testify its convergence, and give its searching supremum and time complexity.

该策略主要思想是结合投标方卫星以往完成观测任务的历史记录,对卫星进行筛选招标,以减轻网络负载和通信量;投标过程中,引入后移空余时间概念,从时间约束和能源约束两个方面来判断投标方卫星是否有"能力"来完成招标的观测任务,并给出相应时间约束和能源约束的检验算法,分析了算法的时间复杂度;评标过程中,基于集覆盖的概念,将任务分配问题转化为集覆盖问题。

In the laboratory,unmated females were placed with randomly chosen males to determine whether,given the opportunity,females would be found mating with the largest available males. I exposed amplexing pairs to other males to determine if larger or smaller males would displace amplexing males.

在实验室内,令未交配雌体选择随机选出的雄体,观测雌体是否与最大的雄体交配;将抱对的蛙暴露于其它雄蛙,观测其它较大或较小的雄蛙是否取代已抱对的雄蛙。

The seeds of Achyranthes Bidentata from recoverable satellite were researched in the present study. The developing progress of the seeds, which were of the SP 1 from the seeds carried by satellite, was observed and analyzed, comparing with the control. Furthermore, the germinative indexes of the seeds from HT and CK were also observed.

利用返回式卫星搭载的中药牛膝种子为材料,与对照组牛膝种子相比较,对搭载后的牛膝种子SP 1植株的种子生长发育过程进行了观测和分析,并对SP 1植株获得的种子发芽及生长情况进行了进一步的观测。

Based on the observational data of the Honghe River flow in Manhao hydrometric station and precipitation field,temperature field in Yunnan,using the wavelet transform and correlation analysis method,the characteristics of the transboundary flow change of the Honghe River and the relationship with precipitation field and temperature field over Yunnan are analyzed.

以云南境内红河蛮耗站的多年径流量观测数据和云南的降水场、气温场观测数据为基础,应用小波变换和相关系数的统计分析方法,分析了红河的跨境径流量变化特征及其与云南气候变化的关系。

The result shows that, the ESWs observed in the separatrix of reconnection which takes place during a substorm, is more solitary and more nonlinear than that in other regions.

研究表明,亚暴期间在磁尾发生磁场重联,重联区域的分形线附近观测到了大量的静电孤立波,其特性与在其他地方观测到的并没有显著差别,但具有更明显的非线性和孤立性的特征。

The program compile with BASIC language and O'NILLs filter coefficient can be used for forward calculation with the gived model.with the input of the observed data and the assumeed model,one can obtain the observed curve and calcula- ted curve in the Same dual logarithm coordinate.

该程序是根据 ONILL 的滤波系数,利用BASIC 语言编制的。它根据给定的地层模型可作正演计算。输入野外观测值以及所假设的地层模型便可在同一个双对数座标中绘出观测曲线和计算的曲线。

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