ID 原文 译文
23845 该文引入 Wigner-Ville 分布中的交叉项，通过建立交叉项时频分布特性与椭圆球面波函数(Prolate Spheroidal Wave Function, PSWF)信号及其 Hilbert 变换信号性质之间的关系，重点研究了 PSWF 信号间交叉项时频分布特性与信号自身奇偶性、最佳时频能量聚集性等性质的关系，交叉项在时域、频域、时频域的能量密度分布规律。 This paper introduces the cross-terms in Wigner-Ville distribution to explore the time-frequency mechanism and regular of interaction between Prolate Spheroidal Wave Function (PSWF). By establishing the relationship between time-frequency characteristics of cross-terms and the excellent characteristics of PSWF and its Hilbert signal, the relationship between the cross-terms of PSWF signal and the characteristics of PSWF signal is mainly studied, such as parity feature and the best energy clustering, and the regular of the energy density of cross-terms in time domain, frequency domain, and time-frequency domain is studied.
23846 理论和仿真分析表明，PSWF 信号间交叉项具有良好的对称性、时频能量聚集性。 Both the mathematical deduction and simulation result show that the time-frequency characteristics of cross-terms have good symmetry and energy clustering.
23847 且交叉项时频分布的局部特征参量，与相互作用的 PSWF 信号阶数、功率谱局部能量密度峰值点个数以及位置密切相关，能够反映信号在时频域的相干程度，为下一步探索研究高效 PSWF 信号时频域检测方法提供参考依据。 Meanwhile, the time-frequency localization characteristics of Wigner-Ville distribution have close relationship with the order and power spectrum density of PSWF signal, reflecting the degree of coherence between PSWF signals. Furthermore, those characteristics of cross-terms which are found can provide reference basis for the research on efficient time-frequency detection method for PSWF signal.
23848 现有的视频流分类方法体现出内容依赖及特征依赖的局限性，该文引入流量分形理论，并在小波域内，提出一种基于 Hurst 指数的 Fractals 分类模型以改进不足。 The existing methods about fine classification of video traffic suffer from a couple of serious limitations: content dependency and feature dependency. Then, theory of fractals is introduced in this paper, and in wavelet domain, a classification model named Fractals is presented based on Hurst exponent.
23849 为此，该文首先描述流的分形性质，定义流的 Hurst 指数，推导小波域内 Hurst 指数的估计过程。 For this purpose, fractal properties of video flows are described, the corresponding Hurst exponent is defined, and the estimated value of Hurst exponent in wavelet domain is derived.
23850 然后，基于代价函数优化分段目标，用聚类差异度方法计算分段 Hurst 指数的总体差异量，再基于最大类间方差阈值进行分析，从而实现视频流的细粒度分类。 Then, the optimum segments based on cost function is analyzed, the statistical differential level is calculated with the method of clustering, and the classification results are deduced with maximum between-cluster variance threshold.
23851 研究结果表明，该文提出的分类方法，以随机数据的变化特性为内容，突破了内容依赖的局限性，解决了特征制约的瓶颈，提高了视频流的分类效果。 The result shows that the classification method with Fractals, which takes data variability as the content, makes up for the defect of content dependency and feature dependency, and demonstrates wonderful performance when classifying video flows.
23852 为了解决现有中继激励机制中长期回报存在不确定性，以及即时回报导致资源利用效率降低的问题，该文针对协作下行通信系统提出一种复合中继激励机制(CCRI)。 In order to overcome the uncertainty of the reward with long-term relay incentive strategy and the degradation of resource utilization efficiency incurred by the short-term incentive scheme, a Cooperative Compound Relay Incentive (CCRI) mechanism is proposed for cooperative downlink communication system.
23853 首先利用链路不平衡产生的瓶颈，将第 1 跳链路超过第 2 跳的数据速率部分作为即时回报，用于中继节点自身数据的传输； By exploiting the bottleneck resulted from the imbalance of links' capability, the rate difference that the first hop exceeds the second is provided as an instant reward for the relay node's own data transmission.
23854 同时针对即时回报量不足，过量或瓶颈存在于第 1 跳导致即时回报失效的情况，采用基于比例公平的长期回报作为补充，进一步调整中继节点的调度权重。 In addition, by taking into account the situations where the short-term reward is insufficient, excessive or the bottleneck exists in the first hop in such a case that the short-term incentive scheme becomes unavailable, a proportional fair based long-term incentive is employed as supplementary, with which the relay node's scheduling weight is further adjusted.