Xuelan Zou

Hierarchy-Aware Focal Loss for Long-Tail Chinese Address Parsing with RoBERTa-CRF

Bo Yang, Hao Zeng, Xuxue Sun, Xuelan Zou et autres

cn, gb (code pays fourni par la source)

Inverse Covariance Intersection Fusion Steady-state Kalman Filter for Uncertain Systems with Missing Measurements and Linearly Correlated White Noises

Xuemei Wang, Guili Tao, Xuelan Zou, Liang Hong

For systems with missing measurements and linearly correlated white noises, by introducing the fictitious noises to compensate the multiplicative noise terms, the original system can be converted into one with only noise variances. The steady-state Kalman filter is designed by inverse covariance …

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Research and Application of Computational Thinking on Python Teaching

Xuemei Wang, Xuelan Zou, Weifeng Yin, Qingsheng Li et autres

With the development of science and technology, the interdisciplinary knowledge penetration has become an important trend in the development of science and technology. Computational thinking is expanding from the field of computer science to other disciplines. The computational thinking is the focus …

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Design of Online Teaching for Network Security Technology under Epidemic Situation

Xuelan Zou, Xuemei Wang, Yunxia Hu

In order to improve the quality of online teaching in the context of the epidemic, combined with the characteristics and teaching goals of network security technology course, a hybrid three-dimensional network teaching mode based on PBL is proposed in this paper. It …

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Exploration and Practice of Online Teaching for Data Structure in Epidemic Period

Xuemei Wang, Xuelan Zou, Weifeng Yin

During the epidemic period, we present personalized and hierarchical teaching to expand learning time and space according to the changing teaching methods by information technology. The curriculum reform of data structure as an example, we analyze the question of curriculum teaching in …

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Dispersion relations of saw propagating under periodical gratingon langasite

Xiaolan Qian, Fang-Qian Xu, Yixiang Chen, Xuelan Zou et autres

The constellation condensing for signal space alignment in MIMO Y channel - 1

Chaotic block interleaver design for bit-interleaved coded modulation with iterative decoding

Xuelan Zou, Xiaolan Qian, Weiyan Liu, Yaolian Song

To satisfy the requirement for multimedia applications over wireless mobile communication systems, the demand for efficient and reliable data transmission via wireless channels has grown rapidly. Bit-interleaved coded modulation with iterative decoding (BICM-ID) is a bandwidth efficient transmission scheme with good performance. …

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A research of public opinion on a small world network

Xiaolan Qian, Xiaoping Yuan, Binbin Ren, Xuelan Zou

Public opinion plays an important role in human society. With the development of Internet technology, the formation of public opinion on the Internet has become a hot research topic. In this paper, a more realistic opinion model in the frame of bounded …

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Reliability Optimization of Overlay Multicast Topology with Efficient Genetic Algorithm

Jianguang Weng, Xuelan Zou, Xiaolan Qian

Genetic algorithm (GA) has been widely used in a variety of communication network design problems. The encoding method is the essential issue for GA. In this paper we investigate the topology optimization of the tree-like overlay multicast systems with degree constraints. A …

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Flow-aware based dynamic congestion control in Next-Generation Networks

Weiyan Liu, Xuelan Zou

Congestion control is the key scheme to guarantee Quality of Services (QoS) in Next-Generation-Networks (NGN). A new congestion control algorithm based on flow-awareness for NGN is presented, it can identify different flows congruously in path, and the buffer was adjust dynamically to …

Study of the Performance Sensitivity to SNR Mismatch in BICM-ID System

Xuelan Zou, Guangzeng Feng

在BICM-ID(Bit-Interleaved Coded Modulation with Iterative Decoding,BICM-ID)系统或其他级联码系统中实现迭代检测接收机需要对信道的信噪比(SNR)进行估计。该文研究信噪比估计误差对BICM-ID系统性能的影响,分析各种译码算法对信噪比估计误差的敏感程度。理论分析和仿真结果表明max-log-APP算法对信噪比估计具有最好的鲁棒性,log-APP及其他简化算法对SNR估计误差的鲁棒性在SNR过估计时比SNR欠估计时好,原因在于各个算法所采用的修正函数不同。满足算法性能没有大的损失的SNR估计误差精度范围随着信道条件的改善而增大,通常在-2dB到+6dB之间。因此在非理想的信道状态信息条件下,max-log-APP算法是BICM-ID系统的最佳译码算法。

基于混沌交织的比特交织编码调制及迭代译码 系统性能分析

Guangzeng Feng, Xuelan Zou, WeiYan LIU

Bit-interleaved coded modulation with iterative decoding (BICM-ID) is a bandwidth efficient transmission scheme which is well suitable for next-generation mobile communications. The interleaver design is critical to the high performance of BICM-ID. In this paper we investigate the application of the chaos …

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