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Support-based Neural Network Ensemble Method for Predicting the SoH of Lithium-ion Battery 基于支持的神经网络集成方法预测锂离子电池SoH
Hengshan Zhang, Jiaxuan Xu, Di Wu, Yun Wang
Lithium-ion batteries are widely used in industrial and domestic applications because of their high energy ratio and low self-discharge rate. It is important to accurately predict the State of Health (SoH) of lithium-ion batteries as they degrade during use, which can lead to serious safety hazards. We propose a support-based neural network ensemble method, which incorporates the prediction results of several basic neural network models. First, a set of better initial integration weights is calculated and the initial integration result is obtained, then the support degree between this result and the prediction result of each basic neural network is calculated, and the final integration weights are calculated by the weight iterative update ensemble algorithm and the integration prediction result of lithium-ion batteries SoH is obtained. This method avoids the risk of the "majority principle" which does not guarantee that most models perform better, and removes the constraint of positive integration weights, which can further reduce the adverse effects of poorly performing models on the integration results. We demonstrate the effectiveness of the proposed ensemble method for the lithium-ion batteries SoH prediction problem through a 5-fold cross-validation experiment on two datasets.
锂离子电池具有高能量比和低自放电率等优点,在工业和生活中得到了广泛的应用。由于锂离子电池在使用过程中会发生降解,因此准确预测其健康状态(SoH)非常重要,这可能会导致严重的安全隐患。提出了一种基于支持的神经网络集成方法,该方法综合了几种基本神经网络模型的预测结果。首先计算一组较好的初始积分权值,得到初始积分结果,然后计算该结果与各基本神经网络预测结果之间的支持度,通过权值迭代更新集成算法计算最终的积分权值,得到锂离子电池SoH的积分预测结果。该方法避免了“多数原则”不能保证大多数模型表现更好的风险,并且消除了正积分权的约束,可以进一步减少表现不佳的模型对集成结果的不利影响。我们通过两个数据集上的5倍交叉验证实验证明了所提出的集成方法对锂离子电池SoH预测问题的有效性。
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引用次数: 0
Ultra-wideband/BDS Indoor and Outdoor Seamless Positioning Algorithm Based on FNN-WCF 基于FNN-WCF的超宽带/BDS室内外无缝定位算法
Baojun Zhang, Haitao Zhan, Yinglong Hou, X. Chen
In order to enable the positioning system to complete real-time positioning in indoor and outdoor environments, an Ultra-wide band/Beidou indoor and outdoor seamless positioning algorithm based on fuzzy neural network and weighted cost function (FNN-WCF) is proposed. Through the analysis of multi-source data, the influencing factors needed in the network handover are determined, and the FNN-WCF handover model is constructed to realize seamless handover between different positioning subsystems. Perform operations such as fuzzing and defuzzifying each parameter to calculate the function value of different subsystems, and then compare the size of the function value to choose whether to switch. Experimental results show that the model can effectively realize the vertical switching between different positioning subsystems, and the positioning accuracy is less than 0.25m.
为了使定位系统能够在室内外环境下完成实时定位,提出了一种基于模糊神经网络和加权代价函数(FNN-WCF)的超宽带/北斗室内外无缝定位算法。通过对多源数据的分析,确定网络切换所需的影响因素,构建FNN-WCF切换模型,实现不同定位子系统之间的无缝切换。对各参数进行模糊化、去模糊化等操作,计算出不同子系统的功能值,然后比较功能值的大小,选择是否切换。实验结果表明,该模型能有效实现不同定位子系统之间的垂直切换,定位精度小于0.25m。
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引用次数: 0
LGLFF: A Lightweight Aspect-Level Sentiment Analysis Model Based on Local-Global Features LGLFF:基于局部-全局特征的轻量级方面级情感分析模型
Hao Liang, Xiaopeng Cao, Kaili Wang
Aspect-level sentiment analysis is highly dependent on local context. However, most models are overly concerned with global context and external semantic knowledge. This approach increases the training time of the models. We propose the LGLFF (Lightweight Global and Local Feature Fusion) model. Firstly, we introduce a Distilroberta pretrained model in the LGLFF to encode the global context. Secondly, we use the SRU++ (Simple Recurrent Unit) network to extract global features. Then we adjust the SRD (Semantic-Relative Distance) threshold size by different datasets, and use SRD to mask the global context to get the local context. Finally, we use the multi-head attention mechanism to learn the global and local context features. We do some experiments on three datasets: Twitter, Laptop, and Restaurant. The results show that our model performs better than other benchmark models.
方面级情感分析高度依赖于本地上下文。然而,大多数模型都过于关注全局上下文和外部语义知识。这种方法增加了模型的训练时间。我们提出了LGLFF (Lightweight Global and Local Feature Fusion)模型。首先,我们在LGLFF中引入一个蒸馏roberta预训练模型来对全局上下文进行编码。其次,我们使用SRU++(简单循环单元)网络提取全局特征。然后根据不同的数据集调整SRD (Semantic-Relative Distance,语义相对距离)阈值大小,利用SRD掩盖全局上下文,得到局部上下文。最后,我们使用多头注意机制来学习全局和局部上下文特征。我们在三个数据集上做了一些实验:Twitter, Laptop和Restaurant。结果表明,该模型的性能优于其他基准模型。
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引用次数: 0
A Group-Based Dynamic Neighbor Discovery Algorithm in Mobile Sensor Networks 移动传感器网络中一种基于分组的动态邻居发现算法
Shuai Li, Dongming Xu
At present, wireless sensor networks are more and more favored by experts and scholars, and become a research hotspot in the field of sensing. Sensor networks are mainly used in environmental monitoring, wildlife detection and so on. When a sensor node is in a fast-moving environment, the node needs to discover its neighbors as quickly as possible. Therefore, neighbor discovery has attracted the attention of researchers. Neighbor discovery is an indispensable process in wireless sensor networks. Most of the current neighbor discovery designs are based on paired discovery and a fixed duty cycle. Only when two nodes wake up at the same time can they discover each other. This is completely passive neighbor discovery, and the network discovery delay is too large. And the nodes in the network are constantly moving. This is a challenging problem to reduce the discovery delay. This paper proposes a neighbor discovery algorithm (GDA, in short) that dynamically adjusts the wake-up time of nodes based on group spatial characteristics. At the same time, in order to effectively balance the relationship between energy consumption and discovery delay, a neighbor discovery algorithm that can selectively recommend method of neighbor nodes. This method can recommend suitable neighbor nodes and improve the early detection time. This paper elaborates the network model and algorithm implementation in detail. A large number of simulation results show that the algorithm has achieved good results in reducing discovery delay and network energy consumption.
目前,无线传感器网络越来越受到专家学者的青睐,成为传感领域的一个研究热点。传感器网络主要应用于环境监测、野生动物检测等领域。当传感器节点处于快速移动的环境中时,需要尽可能快地发现它的邻居。因此,邻域的发现引起了研究人员的重视。邻居发现是无线传感器网络中不可缺少的一个过程。目前大多数邻居发现设计都是基于配对发现和固定占空比。只有当两个节点同时唤醒时,它们才能发现彼此。这是完全被动的邻居发现,网络发现延迟太大。网络中的节点在不断移动。如何减少发现延迟是一个具有挑战性的问题。本文提出了一种基于群体空间特征动态调整节点唤醒时间的邻居发现算法(简称GDA)。同时,为了有效平衡能量消耗与发现延迟之间的关系,提出了一种选择性推荐邻居节点的邻居发现算法。该方法可以推荐合适的邻居节点,提高早期检测时间。本文详细阐述了网络模型和算法实现。大量仿真结果表明,该算法在降低发现延迟和网络能耗方面取得了较好的效果。
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引用次数: 0
Design of Communication Controller Chip Based on FlexRay Bus 基于FlexRay总线的通信控制芯片设计
Xiaofeng Yang, Yaling Su
As a new generation of automotive bus, the Flex Ray Alliance includes the largest automotive industry and the most influential. The Flex Ray bus has a very wide range of applications [1], which can promote the development of future automotive electronic systems. The MFR4310 stand-alone FlexRay controller enables easy integration of FlexRay into MCU-based applications and complies with the FlexRay Alliance specification. Driven by the wave of chip localization, in order to solve the problem of insufficient self-sufficiency of China's automotive-grade chips, a communication controller chip based on FlexRay bus was designed, which is fully compatible with MFR4310. In this paper, the implementation of each module of the chip is introduced in detail, and the correctness of the design is verified through functional simulation. After the process of circuit synthesis and post-simulation, the chip layout design is finally completed. After practice, the chip can effectively improve the data transmission efficiency and system stability, and the research results will help promote the development of the localization of the chip.
Flex Ray联盟作为新一代汽车总线,涵盖了全球最大、最具影响力的汽车行业。Flex Ray总线具有非常广泛的应用[1],可以促进未来汽车电子系统的发展。MFR4310独立FlexRay控制器可以轻松地将FlexRay集成到基于mcu的应用程序中,并符合FlexRay联盟规范。在芯片国产化浪潮的推动下,为解决中国汽车级芯片自给能力不足的问题,设计了一款基于FlexRay总线的通信控制器芯片,完全兼容MFR4310。本文详细介绍了芯片各模块的实现,并通过功能仿真验证了设计的正确性。经过电路合成和后期仿真的过程,最终完成了芯片的版图设计。经过实践,该芯片能有效提高数据传输效率和系统稳定性,研究成果有助于推动芯片国产化的发展。
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引用次数: 0
A Simple Semi-Supervised Joint Learning Framework for Few-shot Text Classification 一个简单的半监督联合学习框架,用于少量文本分类
Shaoshuai Lu, Long Chen, Wenjing Wang, Cai Xu, Wei Zhao, Ziyu Guan, Guangyue Lu
The lack of labeled data is the bottleneck restricting deep text classification algorithm. State-of-the-art for most existing deep text classification methods follow the two-step transfer learning paradigm: pre-training a large model on an auxiliary task, and then fine-tuning the model on a labeled data. Their shortcoming is the high cost of training. To reduce training costs as well as alleviate the need for labeled data, we present a novel simple Semi-Supervised Joint Learning (SSJL) framework for few-shot text classification that captures the rich text semantics from large user-tagged data (referred to as weakly-labeled data) with noisy labels while also learning correct category distributions in small labeled data. We refine the contrastive loss function to better exploit inter-class contrastive patterns, making contrastive learning more applicable to the weakly-labeled setting. Besides, an appropriate temperature hyper-parameter can improve model robustness under label noise. The experimental results on four real-world datasets show that our approach outperforms the other baseline methods. Moreover, SSJL significantly boosts the deep models’ performance with only 0.5% (i.e. 32 samples) of the labeled data, showing its robustness in the data sparsity scenario.
缺乏标记数据是制约深度文本分类算法的瓶颈。大多数现有的深度文本分类方法都遵循两步迁移学习范式:在辅助任务上预训练一个大模型,然后在标记数据上对模型进行微调。他们的缺点是培训费用高。为了降低训练成本并减轻对标记数据的需求,我们提出了一种新的简单的半监督联合学习(SSJL)框架,用于少量文本分类,该框架可以从带有噪声标签的大型用户标记数据(称为弱标记数据)中捕获富文本语义,同时还可以在小标记数据中学习正确的类别分布。我们改进了对比损失函数,以更好地利用类间对比模式,使对比学习更适用于弱标记设置。此外,适当的温度超参数可以提高模型在标签噪声下的鲁棒性。在四个真实数据集上的实验结果表明,我们的方法优于其他基线方法。此外,SSJL仅使用标记数据的0.5%(即32个样本)就显著提升了深度模型的性能,显示了其在数据稀疏场景下的鲁棒性。
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引用次数: 0
A Fast Response Neighbor Discovery Algorithm in Low-Duty-Cycle Mobile Sensor Networks 低占空比移动传感器网络中的快速响应邻居发现算法
Anquan Zhang, Dongming Xu
With the rapid development of the Internet of Things, wireless sensor network, one of its important supporting technologies, has attracted more and more attention. We will work in the low duty cycle wireless sensor network, called low duty cycle wireless sensor network. Neighbor discovery is the most initial but essential work in low duty cycle wireless sensor networks. Although some neighbor discovery algorithms can also achieve neighbor discovery, the average discovery delay is long, and it is difficult to achieve the ability to respond quickly. How to make the nodes in the network quickly realize neighbor discovery is a difficult problem in current research. This paper proposes a group-based fast-response neighbor discovery algorithm (GBFR, in short). At the beginning of the time period, the nodes search for their neighbors by sending a short beacon message, so that the nodes group in pairs. By exchanging neighbor work schedules, nodes know ahead of time some other grouped potential neighbors. Combining the relative distance-based algorithm and node movement, it can selectively recommend suitable neighbors so that nodes can wake up actively and determine whether they are neighbors, thereby speeding up neighbor discovery, reducing communication energy consumption, and improving network life. In this paper, a large number of simulation experiments show that the algorithm has achieved good results in reducing the discovery delay and network energy consumption.
随着物联网的快速发展,无线传感器网络作为物联网的重要支撑技术之一,越来越受到人们的关注。我们将工作在低占空比无线传感器网络中,称为低占空比无线传感器网络。在低占空比无线传感器网络中,邻居发现是最重要的工作。有些邻居发现算法虽然也能实现邻居发现,但平均发现延迟较长,难以达到快速响应的能力。如何使网络中的节点快速实现邻居发现是当前研究的一个难题。提出了一种基于分组的快速响应邻居发现算法(简称GBFR)。在时间段开始时,节点通过发送短信标消息搜索相邻节点,使节点成对分组。通过交换邻居工作时间表,节点可以提前知道其他分组的潜在邻居。将基于相对距离的算法与节点运动相结合,有选择地推荐合适的邻居,使节点主动唤醒并判断是否为邻居,从而加快邻居发现速度,降低通信能耗,提高网络寿命。本文通过大量的仿真实验表明,该算法在降低发现延迟和网络能耗方面取得了良好的效果。
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引用次数: 0
A Chinese Named Entity Recognition Method Fusing Word and Radical Features 一种融合词与词根特征的中文命名实体识别方法
Shan Deng, Kai-Biao Lin, Ping Lu
Named Entity Recognition (NER) is a subtask of natural language processing. Its accuracy is crucial for downstream tasks. In Chinese NER, word information is often added to enhance the semantic and boundary information of Chinese words, but these methods ignore the radical information of Chinese characters. This paper propose a multi-feature fusion model(MFFM) for Chinese NER. First, the input sequences are exported to the BERT layer, the word embedding layer and the radical embedding layer respectively; then the above three layer output are combined together as input of the Bidirectional Long Short-Term Memory(BiLSTM) layer to model the contextual information; finally annotate the sequence with conditional random field. The proposed model not only avoids the import of complex structures, but also effectively captures the character features of the context, thus improves the recognition performance. The experimental results show that the F1 value of MFFM reaches 71.02% on the Weibo dataset, which is 3.12% higher than that of the BERT model, and 82.78% on the OntoNotes4.0 dataset, which is 0.85% higher than that of the BERT model.
命名实体识别(NER)是自然语言处理的一个子任务。它的准确性对下游任务至关重要。在汉语的NER中,为了增强汉语词的语义和边界信息,经常添加词信息,但这些方法忽略了汉字的词根信息。本文提出了一种面向中文NER的多特征融合模型。首先,将输入序列分别导出到BERT层、词嵌入层和径向嵌入层;然后将以上三层输出组合为双向长短期记忆(BiLSTM)层的输入,对上下文信息进行建模;最后用条件随机场对序列进行标注。该模型不仅避免了复杂结构的引入,而且有效地捕捉了上下文的特征特征,从而提高了识别性能。实验结果表明,MFFM在微博数据集上的F1值达到71.02%,比BERT模型高3.12%;在OntoNotes4.0数据集上的F1值达到82.78%,比BERT模型高0.85%。
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引用次数: 0
A Differential Privacy K-Means Algorithm for Improving Privacy Budget Allocation 一种改进隐私预算分配的差分隐私K-Means算法
Sen Liu, Jianhua Liu
As a privacy protection method with strict mathematical definition, differential privacy has been widely used in various fields of data mining including clustering algorithm. However, the traditional differential privacy k-means algorithm is sensitive to the selection of initial value, and the allocation of privacy budget is relatively single, which reduces the availability of the algorithm. In order to further improve the availability of the differential privacy K-means algorithm, this paper proposes a privacy budget allocation method combining error analysis to optimize algorithm iteration times and merge clustering, and carries out theoretical analysis and experimental verification at the same time. The results show that the algorithm not only satisfies the definition of differential privacy, but also improves the availability of clustering effectively.
差分隐私作为一种具有严格数学定义的隐私保护方法,已广泛应用于包括聚类算法在内的数据挖掘的各个领域。然而,传统的差分隐私k-means算法对初始值的选择比较敏感,并且隐私预算的分配比较单一,降低了算法的可用性。为了进一步提高差分隐私K-means算法的可用性,本文提出了一种结合误差分析优化算法迭代次数和合并聚类的隐私预算分配方法,同时进行了理论分析和实验验证。结果表明,该算法不仅满足差分隐私的定义,而且有效地提高了聚类的可用性。
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引用次数: 0
Research on Radar Corrosion Prediction Model Based on BP Neural Network Optimized by Genetic Algorithm 基于遗传算法优化的BP神经网络雷达腐蚀预测模型研究
Duanquan Fan, Lei Yin, Longwen Shen
This paper presents a prediction model for radar antenna corrosion based on BP neural network optimized by genetic algorithm. The initial connection weights and thresholds of the network model are optimized by the genetic algorithm, then the BP network optimized by the genetic algorithm is designed, and the method is validated by simulation using the prediction of radar whole machine corrosion as an example. The experimental results show that the prediction of radar antenna corrosion based on GA-BP meets the accuracy requirements of radar antenna corrosion prediction.
提出了一种基于遗传算法优化的BP神经网络的雷达天线腐蚀预测模型。通过遗传算法对网络模型的初始连接权值和阈值进行优化,设计了遗传算法优化后的BP网络,并以雷达整机腐蚀预测为例进行了仿真验证。实验结果表明,基于GA-BP的雷达天线腐蚀预测满足雷达天线腐蚀预测的精度要求。
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引用次数: 0
期刊
Proceedings of the 2022 5th International Conference on Artificial Intelligence and Pattern Recognition
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