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A highly reliable encoding and decoding communication framework based on semantic information

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Digital Communications and Networks 2024年第3期10卷 509-518页

作者： Yichi Zhang Haitao Zhao Kuo cao Li Zhou Zhe Wang yueling Liu Jibo Wei College of Electronic Science and Technology National University of Defense TechnologyChangsha 410073China

Increasing research has focused on semantic communication,the goal of which is to convey accurately the meaning instead of transmitting symbols from the sender to the *** this paper,we design a novel encoding and decoding semantic communication framework,which adopts the semantic information and the contextual correlations between items to optimize the performance of a communication system over various *** the sender side,the average semantic loss caused by the wrong detection is defined,and a semantic source encoding strategy is developed to minimize the average semantic *** further improve communication reliability,a decoding strategy that utilizes the semantic and the context information to recover messages is proposed in the *** simulation results validate the superior performance of our strategies over state-of-the-art semantic coding and decoding policies on different communication channels.

关键词： Semantic information Semantic encoding method Context-based decoding method

Extended context-based semantic communication system for text transmission

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Digital Communications and Networks 2024年第3期10卷 568-576页

作者： yueling Liu Shengteng Jiang Yichi Zhang Kuo cao Li Zhou Boon-Chong Seet Haitao Zhao Jibo Wei College of Electronic Science and Technology National University of Defense TechnologyChangsha410073China Department of Electrical and Electronic Engineering Auckland University of TechnologyAucklandNew Zealand

Context information is significant for semantic extraction and recovery of messages in semantic ***,context information is not fully utilized in the existing semantic communication systems since re-lationships between sentences are often *** this paper,we propose an Extended Context-based Semantic Communication(ECSC)system for text transmission,in which context information within and between sentences is explored for semantic representation and *** the encoder,self-attention and segment-level relative attention are used to extract context information within and between sentences,*** addition,a gate mechanism is adopted at the encoder to incorporate the context information from different *** the decoder,Transformer-XL is introduced to obtain more semantic information from the historical communication processes for semantic *** results show the effectiveness of our proposed model in improving the semantic accuracy between transmitted and recovered messages under various channel conditions.

关键词： semantic communication extended context Transformer-XL

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蓖麻油多元醇在聚氨酯阻燃硬泡中的应用研究

聚氨酯工业 2013年第2期28卷 19-22页

作者：冯月兰李其峰王军威亢茂青曹月领王心葵中国科学院山西煤炭化学研究所太原030001

通过蓖麻油与甘油进行酯交换反应制备蓖麻油多元醇,并应用于聚氨酯阻燃硬泡的制备,研究了阻燃剂类型、添加量及蓖麻油多元醇的添加量对聚氨酯硬质泡沫(RPUF)综合性能的影响。结果表明,蓖麻油多元醇的添加量对阻燃RPUF氧指数影响不大,只... 详细信息

通过蓖麻油与甘油进行酯交换反应制备蓖麻油多元醇,并应用于聚氨酯阻燃硬泡的制备,研究了阻燃剂类型、添加量及蓖麻油多元醇的添加量对聚氨酯硬质泡沫(RPUF)综合性能的影响。结果表明,蓖麻油多元醇的添加量对阻燃RPUF氧指数影响不大,只是添加量大于50%时会导致泡沫收缩;添加不同阻燃剂后发现甲基磷酸二甲酯(DMMP)的阻燃效果好,DMMP合适用量为多元醇组分的20%～30%。

关键词：蓖麻油多元醇聚氨酯硬泡阻燃性能压缩强度尺寸稳定性

Lithium chloride ameliorates learning and memory ability and inhibits glycogen synthase kinase-3 beta activity in a mouse model of fragile X syndrome

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Neural Regeneration Research 2011年第31期6卷 2452-2459页

作者： Shengqiang Chen Xuegang Luo Quan Yang Weiwen Sun Kaiyi cao Xi Chen yueling Huang Lijun Dai Yonghong Yi Department of Human Anatomy and Neurobiology College of Basic Medicine Central South University Changsha 410013 Hunan Province China Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province the Ministry of Education Institute of Neuroscience Second Affiliated Hospital of Guangzhou Medical College Guangzhou 510260 Guangdong Province China Laboratory Animal Research Center of Guangzhou Medical College Guangzhou 510182 Guangdong Province China

In the present study,Fmr1 knockout mice （KO mice） were used as the model for fragile X *** results of step-through and step-down tests demonstrated that Fmr1 KO mice had shorter latencies and more error counts,indicating a learning and memory *** treatment with 30,60,90,120,or 200 mg/kg lithium chloride,the learning and memory abilities of the Fmr1 KO mice were significantly ameliorated,in particular,the 200 mg/kg lithium chloride treatment had the most significant *** blot analysis showed that lithium chloride significantly enhanced the expression of phosphorylated glycogen synthase kinase 3 beta,an inactive form of glycogen synthase kinase 3 beta,in the cerebral cortex and hippocampus of the Fmr1 KO *** results indicated that lithium chloride improved learning and memory in the Fmr1 KO mice,possibly by inhibiting glycogen synthase kinase 3 beta activity.

关键词： fragile X syndrome Fmr1 knockout mice step-down test step-through test learning and memory glycogen synthase kinase 3 beta lithium chloride

Econometric Analysis of Documents Relating to Prevalence of Apple Ring Rot

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Plant Diseases and Pests 2013年第2期4卷 18-21页

作者： Shen yueling Zhao Zengfeng cao Keqiang Hebei Agricultural University

After retrieving all papers with the theme of ＂apple ring rot＂ from 1994 to 2010, the article made a statistical analysis on locations, occurrence degree, regularity, prevention and treatments of apple ring rot according to published time. The results showed that the occurrence degree of apple ring rot increased year by year, and were uneven among the major apple producing areas with a trend of spreading gradually from east to west. Researchers had paid more attention to control and pharmaceutical experiments of ring rot, while the studies on basic research, projections and forecasts of the disease were not enough. Some prevention and control recommendations of apple ring rot were proposed based on the detailed analysis.

关键词： Apple ring rot Epidemiological Prevention and control measures

高效融合全局和局部上下文特征的语义通信系统

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通信学报 2023年第7期44卷 14-25页

作者：罗鹏刘月玲张聿远曹阔赵海涛魏急波国防科技大学电子科学学院湖南长沙410073

采用基于深度学习的端到端一体化设计方法,提出了一种基于扩展上下文语义特征的通信系统。区别于已有研究中只关注局部上下文而忽视全局上下文的问题,所提系统有机地融合了局部和全局上下文知识,利用扩展上下文知识进行语义编码和语义译... 详细信息

采用基于深度学习的端到端一体化设计方法,提出了一种基于扩展上下文语义特征的通信系统。区别于已有研究中只关注局部上下文而忽视全局上下文的问题,所提系统有机地融合了局部和全局上下文知识,利用扩展上下文知识进行语义编码和语义译码,提升了语义通信系统的可靠性。在发送端,采用基于扩展上下文的语义编码,实现高效的语义表征。在接收端,结合历史通信文本挖掘机制、上下文语义特征学习机制和基于启发式图搜索的译码策略,提升语义推理的准确性。与现有语义通信系统仿真对比结果表明,相较于传统通信系统和现有语义通信系统,所提系统在低信噪比下显著提升了通信系统的可靠性。

关键词：语义通信局部上下文全局上下文扩展上下文历史通信文本

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薏苡产量与主要农艺性状的灰色关联度分析

种子 2015年第8期34卷 105-106页

作者：俞玮金月龄李林王德曹家洪安顺市农业科学院贵州普定562100 安顺新金秋科技股份有限公司贵州安顺561000

根据2012—2014年国家薏苡区域试验数据,应用灰色关联度分析方法,分析了薏苡的主要农艺性状与产量的关系程度。结果表明,对薏苡产量影响最大的性状为穗粒数,其后依次为主茎节数、生育期、千粒重、株高。因此,在薏苡品种选育时,应优先考... 详细信息

根据2012—2014年国家薏苡区域试验数据,应用灰色关联度分析方法,分析了薏苡的主要农艺性状与产量的关系程度。结果表明,对薏苡产量影响最大的性状为穗粒数,其后依次为主茎节数、生育期、千粒重、株高。因此,在薏苡品种选育时,应优先考虑穗粒数,其次是主茎节数、生育期等性状。

关键词：薏苡产量农艺性状灰色关联度分析

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大直径直缝焊管工艺方案设计

鞍钢技术 2007年第3期 30-32页

作者：曹辉王月伶鞍钢集团设计研究院

目前,采用高压大直径直缝焊管管道已成为长距离输送油气的最佳选择。我国高性能大直径直缝焊管生产尚属空白,为此模拟设计了10万t/a大直径直缝焊管工艺方案,同时介绍了应采用的生产工艺及专用设备。

关键词：大直径直缝焊管三辊弯曲机工艺方案

ADHD儿童家庭环境与成人早期疾病结局及共患人格障碍的关系

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中国心理卫生杂志 2020年第7期34卷 602-606页

作者：常卫利李岳玲曹庆久王玉凤郑州大学第一附属医院郑州450000 Lake Erie College of Osteopathic Medicine Affiliated Hospital Pennsylvania 16509United States 北京大学第六医院北京大学精神卫生研究所国家卫生健康委员会精神卫生学重点实验室(北京大学)国家精神心理疾病临床医学研究中心(北京大学第六医院)北京100083

目的:探讨儿童期家庭环境是否会影响儿童注意缺陷多动障碍(ADHD)患者在成人早期的功能缓解及伴发人格障碍的发生情况。方法:选取符合美国精神障碍诊断与统计手册第4版(DSM-IV)ADHD诊断标准的儿童286例,用家庭环境量表中文版(FES-CV)评... 详细信息

目的:探讨儿童期家庭环境是否会影响儿童注意缺陷多动障碍(ADHD)患者在成人早期的功能缓解及伴发人格障碍的发生情况。方法:选取符合美国精神障碍诊断与统计手册第4版(DSM-IV)ADHD诊断标准的儿童286例,用家庭环境量表中文版(FES-CV)评估儿童期家庭环境,在成人早期随访ADHD的功能缓解情况及人格障碍的伴发情况。采用logistic回归分析儿童期家庭环境与儿童ADHD成人早期结局的关系。结果:平均随访6.2年后,符合成人ADHD诊断的134例(46.9%),符合人格障碍诊断的116例(40.6%)。Logistic回归结果显示,FESCV矛盾性因子分与儿童ADHD持续到成人早期呈正向关联(OR=1.14,95%CI:1.01~1.28,P<0.05),与成人早期人格障碍呈正向关联(OR=1.17,95%CI:1.03~1.31,P<0.05),成功性因子分与成人早期人格障碍负向关联(OR=0.85,95%CI:0.73~0.99,P<0.05)。结论:儿童期家庭环境中的矛盾性表达越强,儿童ADHD持续到成人早期的风险越高,成人早期出现人格障碍的风险越高;成功性表达越强,成人早期出现人格障碍的风险越低。

关键词：注意缺陷多动障碍成人儿童期家庭环境人格障碍成功性矛盾性