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During the four years study on the project, we develop a dynamical forecast model that describing the subtropical ridge surface. A new theory on the role of the land-sea thermal difference on the formation of the Subtropical High is advanced. It is concluded that in the summer subtropics over each continent and its adjacent ocean LO, SE, CO, and a double-dominant heating from west to east compose a LOSECOD heating quadruplet. The influence of the Eurasia continent on SH varies according to the seasonal variation. From the ideal numerical simulation it is shown the important role of the Eaiuan continent and the huge topography on the mechanism of formation and mantanence of the SH during the summer. It is verified by the numerical simulation that the extension of the subtropical continent into the tropics greatly enhances the " East Asian monsoon". Through the Rossby energy dissipation theory it is verified that the deep latent convective heating induces the onset of the South China Sea monsoon over the Bay of Bengal. The relationship and mechanism between the precipitaiton over the East Asia and the Subtropicla high is illustrated by the data. It is also found the close phase lock between the east-west shift of the SH and the disturbence of the east wind belt over the tropical troposphere. The interaction between the structure and activity feature of the SH and the Meiyu over the Yangtze-Huaihe river valley is revealed from the data. The numerical simulation verified the impact of the different SH pattern on the path of the typhoon.

本项目的研究发展了描述副热带高压脊面变化的动力模型,提出了夏季副热带地区四叶型非绝热加热分布型及相应环流拼图的创新理论;明确了大陆尺度的海陆热力差异在副热带高压形成中的作用;指出欧亚地形对副热带高压和气候的影响随季节变化而变化,通过数值试验证明春季青藏高原的感热加热对亚洲夏季风的爆发地点起了"锚定"的作用,进一步证实了副热带高压断裂和亚洲夏季风的最早爆发地点发生在孟加拉湾东岸;利用Rossby波能量频散理论证明了孟加拉湾深对流潜热释放诱导南海季风爆发的机制;揭示了东亚季风降水的季节内变化与西太副高的关系及机理;揭示了西太副高与东西风带中扰动之间的相互作用过程,指出西太副高的东西活动与热带对流层上空东风带扰动和中纬度西风带扰动的移动和锁相密切相关;研究了夏季淮河流域梅雨期间副高结构和活动特征及其与江淮暴雨的相互作用;验证了不同副热带高压形态对台风路径的不同影响;通过数值试验证明了欧亚大陆和青藏高原等大地形对副热带高压形成和维持的重要作用。

By time-varying filtering, we realize the signal selectivity and interference suppression, especially for the signals with time-varying power spectrum. It is shown herein that conventional eigenstructure based methods are lower dimensional special case of the time-frequency subspace fitting method. The closed-form array response estimation algorithms for blind source separation in wireless communication is also developed in the dissertation by exploiting the data structure of second-order statistics of the array output in the presence of multipath. The proposed method achieves array response estimation with little constraint on signal property and propagation environment such as scatters or angular spread. Moreover, the array utilized here can be of arbitrary geometry and even uncalibrated. Since the closed-form solution is obtained, no misconvergency may occur and large amount of computation can be saved. The equivalent feed model and corresponding optimization designation are proposed to realize the downlink multi-user selective transmission. By coherent and non-coherent superposition of the electromagnetical field, multiple beams can be formed using a single array, so that each co-channel user signal is transmitted in each beam and will not interfered with each other. The proposed system scheme implements the digital beamforming and the channel allocation in the base band, therefore is suitable for the utilization of the radio software technology. The feasibility and effectiveness of the proposed model are proved by the RF experiment.

在窄带条件下,GSC-SSF方法还可以提高阵列的虚拟孔径,从而提高估计的性能;可以证明,Cyclic DOA 和SC-SSF方法可看作该方法的特例或近似; 3、提出了二维GSC-SSF方法和宽带谱相关DOA矩阵方法,利用信号的循环平稳特性解决了宽带条件下二维 DOA 估计问题,并具有阵元数少、计算量较小的特点; 4、提出了时频子空间拟合和宽带时频DOA估计算法,将联合时频分析的理论和方法引入到阵列信号的空间谱估计研究中,利用时变滤波实现信号选择性测向和干扰抑制,特别适合于谱时变信号;可以证明传统特征结构法可看作是时频子空间拟合方法的特例; 5、提出了多用户环境下阵列响应的估计方法——CARE方法,该方法对信号结构和传播参数(主要是散射源分布与角度散布)的约束较少,适用于各种几何结构的阵列甚至未校准的阵列,能够直接得到阵列响应的闭式解,因此计算量小、稳健性好,不存在收敛问题; 6、提出了针对多用户下行选择性发送的阵列等效激励模型、优化设计方法及其系统实现方案,通过空间场的相干叠加与非相干叠加使得单一阵列能够形成多个波束,并保证各波束内的用户信号各不相同且相互干扰最小;其系统方案具有在基带实现数字波束成形、信道分配并便于软件无线电实现的特点,其有效性已得到外场实测数据的证实。

In this paper Ⅰ successfully applied these methods to fault diagnosis, and presenting some new innovative machinery fault diagnosis method; First Ⅰ present a new gear wornout fault diagnosis method, this method use the vibration signal's time-frequency attribute and instantaneous phase undulation to accurately detect gear's fault, and by comparing with the traditional frequency domain analysis method, this method reveals that many nonlinear and nonstationary characteristic exist in gear's vibration, this tell us that if we use frequency domain analysis method without pay attention to the signal's characteristic, we could get wrong diagnostic result; Then Ⅰ present a new bearing fault diagnosis method, this method use ATVFD and Hilbert transform to do envelop demodulation,Ⅰ analyze the envelop with time-frequency method and find out that this method is more accurate then traditional method.Ⅰ also explain that the modulation of the fault to the carrier wave may also be non-stationary and nonlinear; Finally Ⅰ present a cylinder pressure measurement method of diesel engine by means of vibration, cylinder pressure is an important parameter of diesel engine fault diagnosis, the pressure measuring is simplified a lot by this method,Ⅰ also use the ATVFD and time-frequency analysis to realize it.

本文中将上述理论方法成功地应用到故障诊断中去,提出了几点创新性的诊断方法;提出了一种齿轮磨损故障诊断的新方法,该方法利用振动信号能量的时频域分布特征与瞬时相位波动特征可以进行精确的齿轮故障诊断,并通过与传统的频域诊断方法的比较,揭示出齿轮振动中存在的明显的非线性与非平稳特征,说明了不加选择地利用频域分析方法进行齿轮故障诊断很可能会得到错误的诊断结果;提出了一种轴承故障诊断的新方法,该方法利用ATVFD分解与Hilbert变换进行包络解调,并对解调得到的包络信号进行时频域分析,可以实现更加准确轴承故障诊断,说明了故障对载波信号的调制往往也是非平稳与非线性的;提出了一种利用振动信号进行柴油机汽缸内压力检测的新方法,柴油机汽缸压力的变化是柴油机故障诊断的重要参数,利用振动方法可大大简化汽缸压力的检测过程,该方法也是综合利用ATVFD分解与时频域分析方法实现的。

The south-north united tectonic environment and tectonic pattern does not exist. The east-west trend thrusting Nappe structure of Majiatan and Hengshanpu can not represent the whole western margin of Ordos. The attempt to solve the regional tectonic problem with simple tectonic pattern is against the geological theory, especially in the Helan Mountain region.(2) After the geochemical data analysis of Ruqigou basalt in Helan Mountain, the article illustrates that it belongs to continental rift basalt which appeared in the late-Triassic and early middle Jurassic. Meanwhile the article states that the region is located in the rift environment of an extension background and Rudigou is located in the central part of the rift.(3) The article illustrates that the western ridge of Helan Mountain used to be on a slope and topography slowly declines from west to east after analysis and demonstrations of the distribution under XiaoSongshan bedding fault. Through comprehensive analysis of the no-strong deformation and bedding fault features, the article states that the Xiaosongshan bedding fault used to be gravity slip detachment structure and it represents the extension from the east to the west. Based on the above and analysis and demonstrations of isotope age and track datting, the article illustrates that the ? characteristic of the east of the western ridge of Helan mountain being higher than the west is the result of its late tectonic reverse.(4) Through comparison between Rujigou region Mesozoic Era late Triassic period-early and middle Jurassic period deposit and that of Ordos Basin and the analysis of the late Triassic period extension and early -middle Jurassic Period deposit povenevance it sets forth that during the period, Rujigou region was part of a large deposit basin which was closer to the northern povenevance and farther from the western povenevance.

以马家滩和横山堡为代表的东西向逆冲推覆构造模式,在整个鄂尔多斯盆地西缘不具有全区统一性,那种试图用单一的构造模式解决本区构造问题的尝试,无疑是与地质实际相悖的,尤其是对贺兰山地区;(2)通过对贺兰山汝箕沟玄武岩地质地球化学测试分析,提出其为大陆裂谷玄武岩,其形成时代为晚三叠—早中侏罗世,并通过该玄武岩的稀土和微量元素的测试分析资料进行了多种判别分析,最终确定该区处于拉张背景下的裂谷环境,汝箕沟地区大致处于当时裂谷的中心部位;(3)通过对小松山断层面之下地层分布规律,结合其变形特征的分析论证,认为当时贺兰山西麓处于一个由东向西平缓抬高的斜坡环境,并通过小松山断层面之下地层的非强烈变形及顺层断层特征等的综合分析,认为贺兰山西麓的小松山断层原本是一重力滑覆断层,它代表了近东西向的拉张,在此基础上通过裂变径迹测试资料的分析论证对其做了进一步认定,目前贺兰山西麓东高西低的剖面特征是该区后期构造反转的结果;(4)通过对汝箕沟地区中生代晚三叠世—早中侏罗世沉积与鄂尔多斯盆地内部的对比、晚三叠世延长组及早中侏罗世沉积物源和水流向分析,认为该时期汝箕沟地区为一更靠近北部物源,而距西部物源明显较远的沉积环境,是一更大型沉积盆地的一部分。

During the four years study on the project, we develop a dynamical forecast model that describing the subtropical ridge surface. A new theory on the role of the land-sea thermal difference on the formation of the Subtropical High is advanced. It is concluded that in the summer subtropics over each continent and its adjacent ocean LO, SE, CO, and a double-dominant heating from west to east compose a LOSECOD heating quadruplet. The influence of the Eurasia continent on SH varies according to the seasonal variation. From the ideal numerical simulation it is shown the important role of the Eaiuan continent and the huge topography on the mechanism of formation and mantanence of the SH during the summer. It is verified by the numerical simulation that the extension of the subtropical continent into the tropics greatly enhances the " East Asian monsoon". Through the Rossby energy dissipation theory it is verified that the deep latent convective heating induces the onset of the South China Sea monsoon over the Bay of Bengal. The relationship and mechanism between the precipitaiton over the East Asia and the Subtropicla high is illustrated by the data. It is also found the close phase lock between the east-west shift of the SH and the disturbence of the east wind belt over the tropical troposphere. The interaction between the structure and activity feature of the SH and the Meiyu over the Yangtze-Huaihe river valley is revealed from the data. The numerical simulation verified the impact of the different SH pattern on the path of the typhoon.

本项目的研究发展了描述副热带高压脊面变化的动力模型,提出了夏季副热带地区四叶型非绝热加热分布型及相应环流拼图的创新理论;明确了大陆尺度的海陆热力差异在副热带高压形成中的作用;指出欧亚地形对副热带高压和气候的影响随季节变化而变化,通过数值试验证明春季青藏高原的感热加热对亚洲夏季风的爆发地点起了&锚定&的作用,进一步证实了副热带高压断裂和亚洲夏季风的最早爆发地点发生在孟加拉湾东岸;利用Rossby波能量频散理论证明了孟加拉湾深对流潜热释放诱导南海季风爆发的机制;揭示了东亚季风降水的季节内变化与西太副高的关系及机理;揭示了西太副高与东西风带中扰动之间的相互作用过程,指出西太副高的东西活动与热带对流层上空东风带扰动和中纬度西风带扰动的移动和锁相密切相关;研究了夏季淮河流域梅雨期间副高结构和活动特征及其与江淮暴雨的相互作用;验证了不同副热带高压形态对台风路径的不同影响;通过数值试验证明了欧亚大陆和青藏高原等大地形对副热带高压形成和维持的重要作用。

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