There are significant statistical correlations among temporal coefficients of spatial patterns of dekad precipitation . lag correlations and cross correlations can be viewed as one clue to mid - long term weather forecast 旬降水量空间型时间系数间存在显荚的统计相关，将时问系数间的1相关和互相关作为中长则天气预报的一干！
An incrementally - iterative algorithm with constant stiffness , which combines step - by - step time integration scheme with unbalanced load transfer method , is employed in numerically implementing of the proposed constitutive model 在模型本构关系的数值实施中，采用将时域逐步积分格式与不平衡荷载转移法相结合的增量?常刚度迭代算法。
One is measurement - feedbackh control for systems with delayed measurement ( s ) , and the other one is thetracking control for systems with multiple input delays . the main contributionsof this thesis are listed as follows 由于lqr问题的结果已知,利用重组观测技术将时滞的h2估计问题转化为无时滞的h2估计问题,从而可由kalman滤波求解。
Students completing this assignment will be allowed to select the topic they wish to research ; note , however , that the focus must be on policy and / or planning aspects of water supply and sanitation in developing countries 学生完成这个作业将时，允许选择自己想去研究的课题，注意，不论如何，必须聚焦于发展中国家的给水和卫生设施政策和?或规划。
Taking many uncertain factors in radio channel into account , the conflict is even more pungent while ofdm translate the high demand in time domain into the one hi frequency domain , and resolve the problem to transmit high bit - rate data in multi - path channel 由于移动信道的多种不确定因素，这一矛盾显得益发突出。 ofdm技术将时域的高要求转化为频域的高要求，解决了无线通信中高速率数据传输抗干扰的问题。
The key technology of the moving load identification is realized with the certain precision by using the generalized ortho - polynomial method , and the dynamic moving load identification model in generalized ortho - polynomial domain is established 本文在载荷匀速移动的基础上，将时域识别的方法推广运用到变速运动的载荷，运用广义正交变换技术研究了移动载荷识别的新方法，并推导出了在广义正交域下移动载荷识别的数学模型。
Taking dc motor test as an example , a creative idea of applications of some advanced signal processing tools , such as time - frequency analysis , wavelet , and instantaneous frequency ( if ) evaluation , in motor testing field is presented . the paper systematically summarizes basic theories of time - frequency analysis and wavelet transform based on which an in - depth research of effective if evaluation based on wavelet ridge and wavelet curve is carried out . in the end a fast t - n characteristic testing system with neither torque nor speed sensor is successfully developed 本论文主要关注小波分析在电机性能自动测试系统中的应用，针对传统电机测试系统以及信号处理技术在电机测试领域中应用的不足，以直流电机为例，提出了将时频分析、小波包变换以及基于小波脊的瞬时频率提取方法应用到电机测试领域的新思路；较系统地总结了时频分析和小波变换的基本理论，深入探讨了基于小波脊线和小波曲线的瞬时频率提取，并成功开发了基于正交小波包分析和基于小波脊线的瞬时频率提取的无转矩转速传感器的直流电机快速测试系统。
When time delay is time varying , the varying rate of the time delay is modeled as uncertain parameters or disturbance . stability and transparency are discussed in four cases ( time varying delay and known environment ; time varying delay and unknown environment ; time invariable delay and known environment ; time invariable delay and unknown environment ) . in this dissertation , simulations are made for major design schemes 时延时变时，我们将时延的变化率建模为系统不确定参数或扰动，分四种情况(时延时不变、环境模型已知；时延时不变、环境模型未知;时延时变、环境模型已知：时延时变、环境模型未知)讨论了系统的稳定性，而且使系统具有良好的透明性。
Gmpls is developed from mpls gmpls , in which time slots , wavelengths and optical fiber physical ports are used as labels for corresponding data transmit , is the inevitable result of mpls extending to optical networks . by the extended signaling protocols , routing protocols and new link management protocols , gmpls satisfies the requests of intelligent optical networks control automatically and signaling , and so provides dynamic networks resource and improves survivability Gmpls由mpls演进而来，它是mpls向光层扩展的必然产物。 gmpls将时隙、波长和光纤端口作为标签用于数据转发，通过采用扩展的信令、路由协议和新增的链路管理机制以适应对智能光网络进行动态控制和传送信令的要求，动态提供网络资源并增加网络的存活性。
Future mobile communications have to support the transmission of high rate data and multimedia applications in the radio spectrum , which is already extremely scarce . the basic idea of adaptive coded modulation is to maintain a constant throughput by varying the transmitted power level , symbol transmission rate , constellation size , coding rate or any combination of these parameters . thus , without sacrificing bit - error rate ( ber ) , these schemes provide high average spectral efficiency by transmitting at high speeds under favorable channel conditions , and reducing throughput as the channel degrades 自适应编码调制( adaptivecodedmodulation , acm )的基本思想是在不牺牲系统传输性能(比如ber )为代价的前提下,通过单独改变发送功率、波特率、编码方案、码率、调制方式,或者是综合改变前面所述的各种参数,在有利的信道条件下,获得较大的吞吐量,当信道质量下将时,相应地降低传输速率,最终达到提高平均频谱效率的目的。
