ID 原文 译文
18325 低频天波的准确预测对于低电离层探测、远程导航授时具有重要意义。 Accurate prediction of low-frequency sky-wave has significance for the lower ionosphere detection andremote navigation timing.
18326 该文基于传统“波跳”理论和FDTD方法对地-电离层波导中天波传播时延特性进行研究。 The characteristics of sky-wave propagation time delay in the Earth-ionospherewaveguide are studied in this paper based on the traditional wave-hop theory and FDTD method.
18327 结合天地波时域分离技术，给出了100 kHz载频罗兰-C信号在均匀/指数渐变各向同性电离层条件下，距发射台200 km范围内采用两种方法计算的一跳天波时延随收发距离的变化规律。 Time delayvariations of 100 kHz one-hop sky waves are given under homogeneous/exponentially graded isotropicionosphere waveguide models. The great-circle distance between the transmitter and the receiver is within 200 km.Together with a sky- and ground-wave separation technique in the time domain, the narrow-band Loran-Csignals are employed in two methods.
18328 与“波跳”理论相比，该方法可同时考虑地面不规则、电离层昼夜参数分布不均匀的影响，计算精度更高。 Compared to the results of wave-hop theory, the method in this paperhas higher calculation accuracy by considering the influence of irregular earth and inhomogeneous distributionof ionospheric day-night parameters at the same time.
18329 针对现有的非对称分布式信源编码(DSC)方案均存在的在误比特率(BER)以及压缩率方面的不足，该文提出基于边信息改进的DSC(DSCUISI)方案。 Considering the shortcomings on the Bit Error Rate (BER) and the compression ratio of the existingasymmetric Distributed Source Coding (DSC) schemes, a scheme named Distributed Source Coding UsingImproved Side Information (DSCUISI) is proposed.
18330 发送方对信源序列进行抽样，将序列分为抽样与未抽样子序列，利用算术编码器对未抽样子序列进行压缩，同时计算抽样子序列的伴随式。 At the sender, the source sequence is sampled and dividedinto a sampled and an un-sampled sub-sequences. The un-sampled sub-sequence is compressed by arithmeticcoder while the syndrome of the sampled sub-sequence is calculated.
18331 接收方利用边信息序列与未抽样子序列之间的相关性，对抽样符号进行估计，估计出的序列与原始抽样子序列的相关性得到改进。 The receiver exploits the correlation between the side information and the un-sampled sub-sequence to estimate the sampled symbols, so that the correlation between the estimated sequence and the original sampled sub-sequence is improved.
18332 最后利用原始抽样子序列的伴随式与估计出的序列进行联合译码以重建原始抽样子序列。 Finally, thesyndromes and the estimated sequence are used to recover the sampled sub-sequence.
18333 实验结果表明：与基于低密度奇偶校验码和算术码的DSC方案相比，该文所提方案在信源内部相关性较强时具有压缩率高、在信源间相关度不高时则有重建错误率低的特点，是一种高效、实用且易于实现的DSC方案。 Experiment results showthat the DSCUISI can reach high compression ratio, when the correlation among neighboring symbols is strong.The BER of the reconstructed sequence can be kept low when the correlation between sources are weak. It is anefficient, practical DSC scheme and is easy to be implemented.
18334 红外热成像系统在夜间实施目标识别与检测优势明显，而移动平台上动态环境所导致的运动散焦模糊影响上述成像系统的应用。 Infrared thermal imaging system has obvious advantages in target recognition and detection at night, and the motion defocus blur caused by dynamic environment on mobile platform affects the application of the above imaging system.