查询词典 spatial model

The main job and contribution of this paper are as follows:Based on narrowband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, compute the cross-correlation function of FH signals from multichannels, then we get the cross power spectral density matrixCSDM Secondly, select the hops of FH signals from the CSDM via processing and analyzing the CSDM, meanwhile reduce the influence coming from noise, fixed frequency signal and other interferences; Lastly, estimating the DOA of every hop and according to the DOA, we can separate the hops, get the number of FH signals and their parameters. Propose a new method for designing the threshold in FH signal detection. This method makes it easy to get the threshold by theoretic computing and it can extremely reduce the interference of non-FH signals.Based on broadband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, get the DOA of the signals by wideband spatial spectrum estimation; secondly, separate the signals by spatial filtering using wideband beamformer; Lastly, we propose two methods for FH signal blind detection and blind parameter estimation, one is for several constant hop-rate FH signals whose dwell-time are different and another is for a single FH signal whose hop-rate is alterable.By employing spatial interpolation in broadband signal beamforming, it can reduce the number of antenna elements and corresponding RF modules, A/D converters, etc. It can also eliminate the mutual coupling between antenna elements while getting the narrower main beamwidth and lower sidelobe level.

本文的主要研究工作和贡献如下：●提出了一种基于窄带处理的FH信号盲检测和参数盲估计的实现方法，即首先求出多路信号之间的互相关，进而得到互功率谱密度矩阵，然后通过对CSDM进行对折处理来抑制噪声、定频信号及其他干扰的影响，并将所有属于FH信号的hop(每一跳的驻留时间在时频图上持续的线段)从CSDM中筛选出来，最后用阵列信号处理中的到达方向估计理论在频域中估计出各个hop的方向参数，利用方位信息完成FH信号分离并得到FH信号的数目及其各自的参数集；●提出了一种确定FH信号检测门限的策略，该策略不仅使得检测门限能够通过理论计算得到，而且还显著地抑制了非跳频信号的干扰，从而能有效地检测出FH信号；●提出了一种基于宽带处理的短波FH信号盲检测和参数盲估计的实现方法，即首先利用宽带空间谱测向技术得到接收信号的DOA，然后采用宽带波束形成技术对特定方向进行空间滤波，实现多个信号的分离，最后分别提出了两种FH信号的盲检测和参数盲估计方法，第一种方法适用于空间某个特定方向上存在着几个驻留时间不同的恒跳速FH信号和其他干扰信号的混合信号，第二种方法适用于空间某个特定方向上仅含一个可变跳速的FH信号和噪声的混合信号；●将空间插值的概念和宽带波束形成技术结合起来，提出了一种基于频域处理的宽带恒定束宽的波束形成方法。

Results The behavioral features of the aged learning and memory impaired rats were as follow: 1 There was little change happened to the sample performance. 2 The spatial reference memory had obviously declined. The swimming times of searching the hidden platform in the place discrimination performance, the swimming time in a 40cm annulus at the primary platform place (A40T) and the platform crossings in the probe trial performance were the most suitable indexes for mirroring the spatial reference memory abilities. 3 The spatial working memory had not decreased so clearly.

结果 老年学习记忆损害大鼠的行为学改变特征为：1简单学习记忆任务的学习能力没有明显变化。2空间参考记忆能力明显减退，寻找平台所用的游泳时间，40cm环内游泳时间(A40T)和平台跨越次数是反映老年学习记忆害大鼠空间参考记忆能力的理想指标。3空间工作记忆能力减退不明显。

Telecommunication and computer science are deeply changing human society. They are altering our cities, influencing urban life patterns, spatial functions, spatial forms and spatial structures. Both geographical space and virtual space act as carriers of economic, cultural and social activities of urban residents. Therefore, we have to do research on their relationship of coincidence, interaction and interlacement.

分析了城市在地理空间、网络空间上存在的相互依赖关系以及这二者之间复杂作用关系，说明网络空间并非地理上城市空间功能的简单延伸，也并非现实空间的简单镜像；信息社会的城市空间是一种地理空间与网络空间相互依存、相互交织的复合式空间。

With its predominance in opening and laconically spatial data expressing, GML wins eminence both in spatial data saving and conversing, and in spatial interoperation.

GML开放而又简洁的空间数据表达的优势，使得它不仅在空间数据的存储与转换方面表现出众，而且在空间互操作方面也极具特色。

Namely, the first, the beginning, end and length of growing season of every type of vegetation is estimated with threshold method and moving average method, and the beginning end and length of growing season of vegetation from 1982 to 1999 is fitted linearly, finally, linear trend of the beginning end and length of growing season of vegetation is analyzed. The second, phenological phase in different years and zones is estimated based on greatest changes of slope method and EOF analysis method, and the result monitored by the two methods is compared, as a result, trend of growing season change from 1982 to 1999 in different latitude zones is better acquired. The third, phenological phase of vegetation in different spatial location from 1982 to 1999 is fitted based on curve. Then, spatial difference rules of growing season of every year and average of multi-year is discussed in article. In the end, lag correlation and linear regress are used to study relation between phenological phase of different types of vegetation, different latitude zones, different spatial places and climate changes.

利用阈值法和滑动平均法逐年估测了每种植被类型的生长季的开始、结束日期及长度；对18年中植被生长季的开始、结束时间和长度进行一次线性拟合，分析了植被生长季的开始、结束日期和长度的线性变化趋势；基于最大变化斜率法和EOF分析法估计了不同年份、不同区域内植被生长季的开始、结束时间及其长度，并对这两种方法的监测结果作了比较，从而得到了较好的不同纬度区域1982～1999年植被生长季的变化趋势；基于曲线拟合了1982～1999年的不同空间位置的植被物候期，然后讨论了每年和多年平均的植被生长季的空间分异规律；最后利用时滞相关分析和线性回归研究了不同类型植被的物候期与气候变化的相互关系，不同纬度带的植被物候期与气候变化的相互关系，植被物候期与气候变化空间相互关系。

Based on the analysis of Moran scatter plot and spatial lag regression models,it put forward that the spatial statistical analysis could draw some reference value for analyzing spatial structure and pattern and policy-making.

本文借助于Geoda 095 i软件首先通过对2006年第一季度河南省各市GDP增长速度的空间相关性分析，得出河南省各市经济发展之间的空间相互作用以及各个区域内的空间结构特征

Maximum likelihood estimation of spatial lag and spatial error regression modes, some specification tests for spatial autocorrelation and optimization methods for ML are also set forth in this section.

在标准回归模型中可以以两种截然不同的方式来合并空间相关：一是将空间相关表示为因变量的一个空间滞后，二是将空间相关表示为一个误差项的空间自回归结构。

The pupae showed intense spatial aggregation in the studied woodland, 11.1m spatial dependence and 90.7% intensity of local spatial continuity were found, the population presented intensive spotted distribution, and many aggregated spots were found in the whole woodland.

沙棘木蠹蛾蛹的种群呈现较明显的空间聚集状态，空间依赖范围大小为11.1m，局部空间连续性强度为90.7%，呈现较明显的斑块状分布，在整个区域内有很多聚集点。

By analyzing the problem of hydrological 3D spatial dispersion in 3D finite differential numeric simulation of porous groundwater flow, as well as discontinuous spatial distribution and asymmetric thickness of porous aquiferous strata and partitive groundwater stratum, the paper presents the GIS-based technique of 3D spatial dispersion of porous aquiferous stratum system .

分析了目前孔隙地下水流三维有限差分数值模拟中对含水层系统三维空间离散存在的问题，针对自然界孔隙含水层与隔水层空间分布的不连续性与厚度的不均匀性，研究了基于GIS的孔隙含水层系统三维空间离散实现的技术路线，提出了基于GIS与不规则六面体元的孔隙含水层系统的三维空间离散方法，最大限度地保证了离散体元中含水层类型的单一性，提高了孔隙地下水流模拟模型三维空间离散的精度。

For example, it is the metaphor GOOD IS UP that makes "good" plus "up" form top-grade, the metaphor BAD IS DOWN that makes "low" plus "bad" form inferior.4. Based on the weakness of Lakoffian conceptual theory in interpreting spatial metaphors, we propose an interpreting means-metaphorical force, which is much easier to make clear how metaphors are formed between two domains.Based on Lakoffian conceptual metaphor theory and through analyzing Chinese spatial metaphors and their metaphorical extensions, we put forward with an interpreting method-metaphorical force. By applying the interpreting means to analyze Chinese spatial terms used in temporal representations as well as in Chinese appellations, we conclude that such interpreting method is a persuadable explaining theory and an able analyzing method to describe working mechanism of metaphor.

针对Lakoff方位概念隐喻理论在解释汉语方位隐喻的不足，我们通过对汉语方位概念隐喻拓展的具体分析，提出方位隐喻力这一解释概念，同时运用Antu6ano特征选择理论和Boers变化参数理论分析了影响隐喻力大小的因素，从而为准确描述汉语方位隐喻工作的内部机制，得出一种更为有说服力的解释理论和切实可行的分析方法。

Putt your way through 36 fun-filled holes of minigolf on 3D designed courses with elevated greens, bunkers, bridges and water hazards, among other crazy obstacles.

您的推杆方式，通过36个有趣的填孔迷你的三维设计的课程，以提升绿党，掩体，桥梁和水的危害，除其他疯狂的障碍。

Some participles can be used either as attributes or as predicatives.

有些分词既可当定语用，也可当表语用。