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Doped low-density parity-check codes

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Digital Communications and Networks 2024年第1期10卷 217-226页

作者： Yong Li Rui Liu Xianlong Jiao Youqiang Hu zhen luo Francis C.M.Lau College of Computer Science Chongqing UniversityChongqing400044China School of Automation Chongqing UniversityChongqing400044China College of Electronic and Information Engineering Southwest UniversityChongqing400715China Future Wireless Networks and IoT Focusing Area Department of Electronic and Information EngineeringHong Kong Polytechnic UniversityHong KongChina

In this paper,we propose a doping approach to lower the error floor of Low-Density Parity-Check(LDPC)*** doping component is a short block code in which the information bits are selected from the coded bits of the dominant trapping sets of the LDPC ***,an algorithm for selecting the information bits of the short code is proposed,and a specific two-stage decoding algorithm is *** results demonstrate that the proposed doped LDPC code achieves up to 2.0 dB gain compared with the original LDPC code at a frame error rate of 10^(-6)Furthermore,the proposed design can lower the error floor of original LDPC Codes.

关键词： LDPC codes Doped LDPC codes Tanner graph Quadratic residue codes Trapping sets

Lap-Shear Performance of Weld-Bonded Mg Alloy and Austenitic Stainless Steel in Three-Sheet Stack-Up

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Chinese Journal of Mechanical Engineering 2024年第4期 355-366页

作者： Sunusi Marwana Manladan Mukhtar Fatihu Hamza Singh Ramesh zhen luo School of Materials Science and Engineering Tianjin University Department of Mechanical Engineering Faculty of EngineeringBayero University Department of Mechanical Engineering College of EngineeringPrince Sattam bin Abdulaziz University Department of Mechanical Engineering Faculty of EngineeringUniversity of Malaya

With the growing interest in utilizing Mg and austenitic stainless steel(ASS) in the automotive sector, joining them together in three-sheet configuration is inevitable. However, achieving this task presents considerable challenges due to the large differences in their physical, metallurgical and mechanical properties. To overcome these challenges, the feasibility of using weld-bonding to join Mg alloy/ASS/ASS was investigated. The nugget formation,interface characteristics, microstructure and mechanical properties of the joints were investigated. The results show that the connection between the Mg alloy and upper ASS was achieved through the combined effect of the cured adhesive and weld-brazing in the weld zone. On the other hand, a metallurgical bond was formed at the ASS/ASS interface. The Mg nugget microstructure exhibited fine columar grains composed predominantly of primary α-Mg grains along with a eutectic mixture of α-Mg and β-Mg17Al12. The nugget formed at the ASS/ASS interface consisted largely of columnar grains of austenite, with some equiaxed dendritic grains formed at the centerline of the *** weld-bonded joints exhibited an average peak load and energy absorption of about 8.5 kN and 17 J, respectively(the conventional RSW joints failed with minimal or no load application). The failure mode of the joints changed with increasing welding current from interfacial failure via the Mg nugget/upper ASS interface to partial interfacial failure(part of the Mg nugget was pulled out of the Mg sheet). Both failure modes were accompanied by cohesive failure in the adhesive zone.

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Selenopeptide nanomedicine ameliorates atherosclerosis by reducing monocyte adhesions and inflammations

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Nano Research 2024年第7期17卷 6332-6341页

作者： zhen luo Yuxing Jiang Zimo Liu Lamei Guo Li Zhang Hongtao Rong Zhongyu Duan Hongwen Liang Aili Zhang Lei Wang Yu Yi Hao Wang CAS Center for Excellence in Nanoscience CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and Technology(NCNST)No.11 BeiyitiaoZhongguancunBeijing 100190China School of Chemical Engineering and Technology Hebei University of TechnologyTianjin 300130China Tianjin Medical University General Hospital Tianjin 300052China University of Chinese Academy of Sciences Beijing 100049China School of Environmental Science and Safety Engineering Tianjin University of TechnologyTianjin 300384China College of Pharmacy Chongqing Medical UniversityChongqing 400016China School of Biomedical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Atherosclerosis is an inflammatory disease that may cause severe heart disease and *** pharmacotherapy for atherosclerosis shows limited *** the progression of atherosclerosis,monocyte adhesions and inflammatory macrophages play vital ***,precise regulations of inflammatory immune microenvironments in pathological tissues remain ***,we report an atherosclerotic plaque-targeted selenopeptide nanomedicine for inhibiting atherosclerosis progression by reducing monocyte adhesions and inflammation of *** targeted nanomedicine has 2.2-fold enhancement in atherosclerotic lesion *** oxidation-responsibility of selenopeptide enables eliminations of reactive oxygen species and specific release of anti-inflammatory drugs,thereby reducing inflammation responses of ***,we find the oxidative metabolite of selenopeptide,octadecyl selenite,can bind to P-selectin in a high affinity with a dissociation constant of 1.5μ*** in situ generated active seleno-species further inhibit monocyte adhesions for anti-inflammation in *** local regulations of monocyte adhesions and inflammations,the selenopeptide nanomedicine achieves 2.6-fold improvement in atherosclerotic plaque inhibition compared with simvastatin in the atherosclerosis mouse ***,the selenopeptide nanomedicine also displays excellent biological safety in both mice and rhesus *** study provides a safe and effective platform for regulating inflammatory immune microenvironments for inflammatory diseases such as atherosclerosis.

关键词： selenopeptide self-assembly atherosclerosis monocyte adhesion anti-inflammation

Factors and Their Impact on Treatment Effect of Acupuncture in Different Outcomes:A Meta-Regression of Acupuncture Randomized Controlled Trials

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Chinese Journal of Integrative Medicine 2024年第3期30卷 260-266页

作者： XIU Wen-cui GANG Wei-juan ZHOU Qi SHI Lan-jun HU Xiang-yu MING Tian-yu luo zhen ZHANG Yu-qing JING Xiang-hong Institute of Acupuncture and Moxibustion China Academy of Chinese Medical SciencesBeijing100700China China Center for Evidence-Based Traditional Chinese Medicine China Academy of Chinese Medical SciencesBeijing100700China Department of Health Research Methods Evidenceand ImpactMcMaster UniversityHamiltonOntarioL8S 4L8Canada Center for Evidence-Based Integrative Medicine-Clarity Collaboration Guang’anmen HospitalChina Academy of Chinese Medical SciencesBeijing100053China

Background:The effects of acupuncture have varied in different randomized controlled trials(RCTs),and there are many factors that influence treatment effect of acupuncture in different outcomes,with conflicting ***:To identify factors and their impact on the treatment effect of acupuncture in different ***:Acupuncture RCTs were searched from 7 databases including Medline(Pub Med),Embase,Cochrane Central Register of Controlled Trials,China National Knowledge Infrastructure,Wanfang Database,VIP Database,and China Biology Medicine disc between January 1st,2015 and December 31st,*** studies must compare acupuncture to no acupuncture,sham acupuncture,or waiting lists,and report at least 1patient-important outcome.A multi-level meta-regression was conducted using a 3-level robust mixed model and univariate analyses were performed for all independent variables,even those excluded from the multivariable model due to *** used thresholds of 0.2 and 0.4 for the difference of standardized mean differences(SMDs),categorising them as small(0.4) ***:The pain construct analysis involved 211 effect estimates from 153 studies and 14 independent ***-frequency acupuncture treatment sessions produced larger effects compared to low-frequency sessions [large magnitude,the difference of adjusted SMDs 0.46,95% confidence interval(CI) 0.07 to 0.84;P=0.02].The non-pain symptoms construct analysis comprised 323 effect estimates from 231 studies and 15 independent *** acupuncture showed moderately larger effects when compared to non-penetrating acupuncture(0.30,95% CI 0.06 to 0.53;P=0.01).The function construct analysis included 495 effect estimates from 274 studies and 14 independent *** acupuncture and the flexible acupuncture regimen showed moderately larger effects,compared to non-penetrating acupuncture and fixed regimen,respectively(0.40,95% CI 0

关键词： acupuncture randomized controlled trial patient-important outcome meta-regression

Microbiome and metabolome dysbiosis analysis in impaired glucose tolerance for the prediction of progression to diabetes mellitus

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Journal of Genetics and Genomics 2024年第1期51卷 75-86页

作者： Boxun Zhang Xuan Zhang zhen luo Jixiang Ren Xiaotong Yu Haiyan Zhao Yitian Wang Wenhui Zhang Weiwei Tian Xiuxiu Wei Qiyou Ding Haoyu Yang Zishan Jin Xiaolin Tong Jun Wang Linhua Zhao Institute of Metabolic Diseases Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Faculty of Biological Science and Technology Baotou Teacher's CollegeBaotouInner Mongolia 014030China CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Infinitus(China)Company Ltd GuangzhouGuangdong 510405China Affiliated Hospital of Changchun University of Chinese Medicine ChangchunJilin 130021China Department of Endocrinology Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Xinjiekou Community Health Service Center in Xicheng District Beijing 100035China Department of Spleen and Stomach Shenzhen Traditional Chinese Medicine HospitalShenzhenGuangdong 518033China University of Chinese Academy of Sciences Beijing 100049China Beijing University of Chinese Medicine Beijing 100105China Northeast Asia Institute of Traditional Chinese Medicine Changchun University of Chinese MedicineChangchunJilin 130117China

Gut microbiota and circulating metabolite dysbiosis predate important pathological changes in glucose metabolic disorders;however,comprehensive studies on impaired glucose tolerance(IGT),a diabetes mellitus(DM)precursor,are ***,we perform metagenomic sequencing and metabolomics on 47 pairs of individuals with IGT and newly diagnosed DM and 46 controls with normal glucose tolerance(NGT);patients with IGT are followed up after 4 years for progression to *** of baseline data reveals significant differences in gut microbiota and serum metabolites among the IGT,DM,and NGT *** addition,13 types of gut microbiota and 17 types of circulating metabolites showed significant differences at baseline before IGT progressed to DM,including higher levels of Eggerthella unclassified,Coprobacillus unclassified,Clostridium ramosum,L-valine,L-norleucine,and L-isoleucine,and lower levels of Eubacterium eligens,Bacteroides faecis,Lachnospiraceae bacterium 3_1_46FAA,Alistipes senegalensis,Megaspaera elsdenii,Clostridium perfringens,α-linolenic acid,10E,12Z-octadecadienoic acid,and dodecanoic acid.A random forest model based on differential intestinal microbiota and circulating metabolites can predict the progression from IGT to DM(AUC=0.87).These results suggest that microbiome and metabolome dysbiosis occur in individuals with IGT and have important predictive values and potential for intervention in preventing IGT from progressing to DM.

关键词： Impaired glucose tolerance Diabetes mellitus Gut microbiota Metabolomics

劳动价值论走向实证研究的路径比较与理论融合

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政治经济学评论 2024年第4期15卷 142-158页

作者：骆桢张衔四川大学经济学院

劳动价值论是马克思主义政治经济学的理论基础。但是,一旦考虑价值转形为生产价格,其在实证研究中就难以充分发挥作用,也难以将价值转形前后的理论融合在一起进行分析。谢克证明,不论采用何种转形模型,相对价值和相对生产价格都是高度... 详细信息

劳动价值论是马克思主义政治经济学的理论基础。但是,一旦考虑价值转形为生产价格,其在实证研究中就难以充分发挥作用,也难以将价值转形前后的理论融合在一起进行分析。谢克证明,不论采用何种转形模型,相对价值和相对生产价格都是高度近似的。通过对价值转形问题的分歧的理论比较,本文认为,谢克所证明的价值—价格近似关系是马克思进行理论抽象的客观基础,从价值到生产价格转形这一理论抽象程度上的变化并不会带来数量关系的显著改变。这不仅符合马克思从抽象到具体的叙事逻辑,能够将转形前后的理论融为一体,还为将劳动价值论用于实证研究提供了理论基础和方法上的极大便利。

关键词：劳动价值论叙事逻辑价值—价格近似关系

基于相关性分析和SSA-BP神经网络的铝合金电阻点焊质量预测

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焊接学报 2024年第2期45卷 13-18,32,I0003,I0004页

作者：董建伟胡建明罗震天津大学材料科学与工程学院天津300350

基于电阻点焊过程中工艺信号特征,在不同间距、不同间隙和不同间距与间隙3种条件下,引入相关性分析方法分析工艺信号与熔核直径之间的相关性,并建立基于麻雀搜索算法-BP神经网络(sparrow search algorithmback propagation neural netwo... 详细信息

基于电阻点焊过程中工艺信号特征,在不同间距、不同间隙和不同间距与间隙3种条件下,引入相关性分析方法分析工艺信号与熔核直径之间的相关性,并建立基于麻雀搜索算法-BP神经网络(sparrow search algorithmback propagation neural network,SSA-BP)的电阻点焊质量预测模型,将功率、焊接电流、焊接电压和动态电阻作为预测模型输入特征.结果表明,经麻雀搜索算法优化后的BP神经网络在测试集上的决定系数R2、均方误差(meansquare error,MSE)、均方根误差(root mean square error,RMSE)和平均绝对误差(mean absolute error,MAE)分别为0.95,1.55,1.24和0.90,均优于BP模型.获得了功率、焊接电流、焊接电压和动态电阻与熔核直径的映射关系,可为焊接的工艺参数设计提供依据.

关键词：电阻点焊熔核直径麻雀搜索算法 BP神经网络相关性分析

基于改进麻雀搜索算法优化BPNN的电阻点焊质量预测

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天津大学学报（自然科学与工程技术版） 2024年第5期57卷 445-451页

作者：罗震董建伟胡建明天津大学材料科学与工程学院天津300350

电阻点焊技术由于具有高效、自动化程度高等焊接特点,被广泛应用于汽车、航空航天和公共交通等制造领域,由于焊点在封闭状态下进行,焊接过程存在诸多影响因素且无法直接检测,因此,准确预测电阻点焊质量是生产过程中必不可少的环节.本文... 详细信息

电阻点焊技术由于具有高效、自动化程度高等焊接特点,被广泛应用于汽车、航空航天和公共交通等制造领域,由于焊点在封闭状态下进行,焊接过程存在诸多影响因素且无法直接检测,因此,准确预测电阻点焊质量是生产过程中必不可少的环节.本文以2219/5A06铝合金为研究对象,在3种不同的装配条件(包括间隙和间距)下进行电阻点焊工艺信号的分析,并进行人工智能建模.为了提高电阻点焊质量评价的性能和效率,本文采用Logistic-Tent(LT)复合映射改进麻雀搜索算法(SSA)对反向传播神经网络(LT-SSA-BPNN)模型进行优化,模型的输入和输出分别为多信号融合后的变量和熔核直径.实验结果表明,与传统的标准反向传播神经网络(BPNN)模型相比,经过LT-SSA-BP模型优化后,预测结果的平均绝对误差(MAE)、均方误差(MSE)和均方根误差(RMSE)分别降低了36.17%、17.55%和51.75%.同时,LT-SSA-BP神经网络在添加了不同间隙和间距条件作为训练集后,其预测稳定性明显提高,可以成功预测电阻点焊质量.

关键词：电阻点焊质量预测麻雀搜索算法反向传播神经网络模型

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WTO环境与贸易议题的新进展及中国贡献

上海对外经贸大学学报 2024年第4期31卷 23-36,68页

作者：贺小勇罗震华东政法大学国际金融法律学院上海200050 华东政法大学国际法学院上海200050

传统多边环境谈判难以推进、区域环境规则负面影响不断扩大,对环境规则供给的客观需求引发了WTO推进环境与贸易议题的新探索。近年来,WTO在渔业补贴、塑料贸易、环境可持续性、化石燃料补贴等多个环境议题的具体领域取得积极进展,启动... 详细信息

传统多边环境谈判难以推进、区域环境规则负面影响不断扩大,对环境规则供给的客观需求引发了WTO推进环境与贸易议题的新探索。近年来,WTO在渔业补贴、塑料贸易、环境可持续性、化石燃料补贴等多个环境议题的具体领域取得积极进展,启动的三项环境保护倡议以开放式诸边谈判形式发起,通过采取软法性质的规制模式和加强环境规则之间的协调与互动得到了众多成员的广泛支持,呈现出WTO在环境与贸易议题上重振谈判功能的新趋势。中国从自身实践经验出发,逐渐充当了这一议题下的主要参与者,为全球环境治理不断贡献中国方案和中国智慧。

关键词： WTO 环境与贸易区域贸易协定诸边谈判