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论民族民间音乐的当代价值

艺术科技 2024年第6期37卷 20-22页

作者：魏子豪江南大学人文学院江苏无锡214122

目的:文章探讨民族民间音乐的当代价值和重要性,深入分析民族民间音乐的内涵及其传承和发展特点,并提出相关传承发展策略,以期为保护和传承民族民间音乐文化提供一些思路和建议,促进民族民间音乐艺术繁荣发展。方法:探讨民族民间音乐内... 详细信息

目的:文章探讨民族民间音乐的当代价值和重要性,深入分析民族民间音乐的内涵及其传承和发展特点,并提出相关传承发展策略,以期为保护和传承民族民间音乐文化提供一些思路和建议,促进民族民间音乐艺术繁荣发展。方法:探讨民族民间音乐内涵及传承发展特点,发现其存在地域限制、开放性和交互性不足、时代和地域特色显著等特点。同时,探究民族民间音乐传承和发展策略,以促进民族民间音乐艺术持续发展和传承。结果:民族民间音乐的发展是一个不断探索和创新的过程,它既承载着丰富的传统文化底蕴,又积极适应当代社会的需求和变化。通过不断推陈出新、融合交流,民族民间音乐必将在当代社会焕发新的生机与活力。结论:民族民间音乐对社会、教育和文化的重要性不言而喻,是当代社会发展必须重视和面对的重要议题。在未来的研究和实践中,应当不断探索创新,促进民族民间音乐艺术传承和发展,让其在当代社会发挥更大的作用,为文化的传承和多样性作出更大贡献。

关键词：民族民间音乐文化表达传承发展价值

A small first-order DPA resistant AES implementation with no fresh randomness

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Science China(Information Sciences) 2022年第6期65卷 261-263页

作者： Man wei Siwei SUN zihao wei Zheng GONG Lei HU State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences Data Assurance and Communication Security Research Center Chinese Academy of Sciences School of Cyber Security University of Chinese Academy of Sciences School of Compute Science South China Normal University

Dear editor,Cryptographic algorithms exist in the form of software or hardware components inside security-critical information systems, which are often deployed in a hostile ***, other than guaranteeing the security of the cryptographic algorithms in the black-box model, ensuring the security of the software or hardware components against the attacks exploiting the physical leakage of the underlying devices is considerably important. Among these attacks,

关键词： side channel analysis DPA threshold implementation domain-oriented masking AES

不同延时条件下基于激光诱导击穿光谱的烧结混合料定量检测

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光学精密工程 2024年第13期32卷 2052-2060页

作者：秦云鹏隋明达魏自浩薛世龙卢渊田野郭金家中国海洋大学信息科学与工程学部山东青岛266100

烧结混合料是烧结工艺中极为重要的一环,其成分检测的准确性直接影响烧结过程,激光诱导击穿光谱技术通过激光光谱分析烧结混合料中的元素成分和含量,实时性好,但定量检测效果相比于其他实验室方法仍有差距。研发了一套遥测激光诱导击穿... 详细信息

烧结混合料是烧结工艺中极为重要的一环,其成分检测的准确性直接影响烧结过程,激光诱导击穿光谱技术通过激光光谱分析烧结混合料中的元素成分和含量,实时性好,但定量检测效果相比于其他实验室方法仍有差距。研发了一套遥测激光诱导击穿光谱装置,并应用于烧结混合料成分检测,采用PLSR与PCA相结合的方法对烧结混合料中TFe,CaO,SiO_(2),MgO进行定量检测。通过对1.28μs和5μs不同延时的光谱数据计算发现,不同物质在不同探测延时条件下R_(2)有着明显差异,对于SiO_(2)和MgO这两种浓度相对较低的物质,采用较小的1.28μs探测延时,R_(2)分别达到了0.937和0.985,而浓度相对较高的TFe,CaO则采用更大的5μs探测延时效果更好,较采用1.28μs延时,TFe定量结果的R^(2)从0.903提高到0.987,CaO的R^(2)也从0.816提高到0.980。针对不同物质采用不同探测延时的方法显著提高了检测准确性,简化了检测流程,对烧结工艺起到指导作用。

关键词：遥感测量激光诱导击穿光谱烧结混合料偏最小二乘法延时变化

日本家畜共济保险在畜牧业发展保障中的应用:制度设计、效果评估及启示

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世界农业 2024年第3期 5-17页

作者：崔姹王宇航魏子昊赵慧峰河北农业大学经济管理学院保定071000

发挥保险的保障作用是畜牧业高质量发展的重要基础。以家畜共济保险为典型特征的国家日本,其家畜共济保险制度体系对于中国畜牧业保险的发展具有重要参考价值。本文在对家畜共济保险制度演变及当前制度设计等分析的基础上,从制度目标、... 详细信息

发挥保险的保障作用是畜牧业高质量发展的重要基础。以家畜共济保险为典型特征的国家日本,其家畜共济保险制度体系对于中国畜牧业保险的发展具有重要参考价值。本文在对家畜共济保险制度演变及当前制度设计等分析的基础上,从制度目标、制度设计及制度效能等方面构建指标体系对其进行效果评价,得出两方面结论。一是家畜共济保险制度具有共济组织引导加入、共济费缴纳浮动、机构共济赔付等特征。二是制度效果评估方面,日本家畜共济保险在制度目标上能够实现畜种覆盖及保障范围较大,但畜种之间差异明显;制度设计上拥有完善的立法及保险体系,但制度边界较窄;制度效能上保障水平较高,但财政缺口较大。基于此,结合中国畜牧业发展存在问题,得出中国应提高保险覆盖率及保障范围,完善畜牧业保险制度体系、发挥再保险作用,提高机构盈利能力及加强机构之间互助保障作用等有益启示。

关键词：家畜共济保险畜牧业日本中国

Tungsten oxide/nitrogen-doped carbon nanotubes composite catalysts for enhanced redox kinetics in lithium-sulfur batteries

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Chinese Journal of Chemical Engineering 2024年第3期67卷 58-67页

作者： Deqing He zihao Xie Qian Yang wei Wang Chao Su School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212100China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

The sluggish redox kinetics of polysulfides in lithium-sulfur(Li-S)batteries are a significant obstacle to their widespread adoption as energy storage ***,recent studies have shown that tungsten oxide(WO_(3))can facilitate the conversion kinetics of polysulfides in Li-S ***,we fabricated host materials for sulfur using nitrogen-doped carbon nanotubes(N-CNTs)and WO_(3).We used low-cost components and simple procedures to overcome the poor electrical conductivity that is a disadvantage of metal *** composites of WO_(3) and N-CNTs(WO_(3)/N-CNTs)create a stable framework structure,fast ion diffusion channels,and a 3D electron transport network during electrochemical reaction *** a result,the WO_(3)/N-CNT-Li2S6 cathode demonstrates high initial capacity(1162 mA·h·g^(-1) at 0.5℃),excellent rate performance(618 mA·h·g^(-1) at 5.5℃),and a low capacity decay rate(0.093%up to 600 cycles at 2℃).This work presents a novel approach for preparing tungsten oxide/carbon composite catalysts that facilitate the redox kinetics of polysulfide conversion.

关键词： Li-S batteries Composites Ion diffusion channels 3D electron transport network Redox kinetics

熵权法与层次分析法在四川盆地碳酸盐岩气藏开发效果评价中的应用

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天然气勘探与开发 2024年第2期47卷 53-60页

作者：李龙郑姝敖科李琦魏子豪钟萍萍中国石油西南油气田公司勘探开发研究院四川成都610041 捷贝通石油技术集团股份有限公司四川成都610110 中国石油川庆钻探工程有限公司试修公司四川成都610051

在气藏开发过程中,由于多种因素的影响导致不同气藏的开发效果存在差异。目前四川盆地碳酸盐岩气藏开发效果评价,主要是在现有评价标准的基础上对气藏的储量、开发或经济等指标进行评价,综合考虑多方面指标权重的评价方法较少;同时,适... 详细信息

在气藏开发过程中,由于多种因素的影响导致不同气藏的开发效果存在差异。目前四川盆地碳酸盐岩气藏开发效果评价,主要是在现有评价标准的基础上对气藏的储量、开发或经济等指标进行评价,综合考虑多方面指标权重的评价方法较少;同时,适用的评价标准也较少,多数是采用通用的行业标准或者数据归一化标准,而评价标准应随评价样本的变化而变化,才能更准确地刻画评价对象。为此,选取磨溪下寒武统龙王庙组气藏(简称“磨溪龙王庙组气藏”)等55个代表性气藏作为样本,开展了四川盆地碳酸盐岩气藏开发效果评价方法研究,研究结果表明:①采用主成分分析方法从众多评价指标中进行筛选,建立适合四川盆地碳酸盐岩气藏开发效果评价的指标体系,具体评价指标有内部收益率、单位完全成本、亿立方米产能投资、净现值、储量动用率、井控储量、标定采收率、采气速度、稳产期末采出程度、稳产年限、递减期递减率等11项;②采用熵权法和层次分析法相结合的数学方法,从定量和定性方面分析了不同指标对开发效果的影响权重,11项开发效果评价指标按指标权重从大到小排序后的前三位为内部收益率、井控储量、净现值,即这3项指标是对气藏开发效果影响最显著的因素;③采用聚类分析法确定各指标评分量化标准,构建适用于四川盆地碳酸盐岩气藏的开发效果评价新方法,并应用于气藏,得到相应的开发效果评价结果,与气藏的实际开发效果较为吻合。新方法的构建与应用,不仅可以评估处于开发中后期阶段的气藏开发效果,也可以通过指标间的对比分析而找到造成气藏开发效果差异的影响因素,可为今后不同气藏开发方案的制定与实施提供技术参考。

关键词：碳酸盐岩气藏评价指标体系效果评价熵权法层次分析法

Missing Value Imputation for Radar-Derived Time-Series Tracks of Aerial Targets Based on Improved Self-Attention-Based Network

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Computers, Materials & Continua 2024年第3期78卷 3349-3376页

作者： zihao Song Yan Zhou wei Cheng Futai Liang Chenhao Zhang Department of Early Warning Intelligence Early Warning AcademyWuhan430019China

The frequent missing values in radar-derived time-series tracks of aerial targets(RTT-AT)lead to significant challenges in subsequent data-driven ***,the majority of imputation research focuses on random missing(RM)that differs significantly from common missing patterns of *** method for solving the RM may experience performance degradation or failure when applied to RTT-AT *** autoregressive deep learning methods are prone to error accumulation and long-term dependency *** this paper,a non-autoregressive imputation model that addresses the issue of missing value imputation for two common missing patterns in RTT-AT is *** model consists of two probabilistic sparse diagonal masking self-attention(PSDMSA)units and a weight fusion *** learns missing values by combining the representations outputted by the two units,aiming to minimize the difference between the missing values and their actual *** PSDMSA units effectively capture temporal dependencies and attribute correlations between time steps,improving imputation *** weight fusion unit automatically updates the weights of the output representations from the two units to obtain a more accurate final *** experimental results indicate that,despite varying missing rates in the two missing patterns,our model consistently outperforms other methods in imputation performance and exhibits a low frequency of deviations in estimates for specific missing *** to the state-of-the-art autoregressive deep learning imputation model Bidirectional Recurrent Imputation for Time Series(BRITS),our proposed model reduces mean absolute error(MAE)by 31%~50%.Additionally,the model attains a training speed that is 4 to 8 times faster when compared to both BRITS and a standard Transformer model when trained on the same ***,the findings from the ablation experiments demonstrate that the PSDMSA,the weight fusion unit,cascade network design

关键词： Missing value imputation time-series tracks probabilistic sparsity diagonal masking self-attention weight fusion

Effect of post heat treatment on microstructure, mechanical property and corrosion behavior of AlSi10Mg alloy fabricated by selective laser melting

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Progress in Natural Science:Materials International 2024年第1期34卷 89-101页

作者： Yang Zheng zihao Zhao Ruize Xiong Guochun Ren Minghui Yao wei Liu Libin Zang School of Aeronautics and Astronautics Tiangong University School of Mechanical Engineering Tiangong University 3D Printing Research&Engineering Technology Center AECC Beijing Institute of Aeronautical Materials Tianjin Institute of Aerospace Mechanical and Electrical Equipment

The microstructure, mechanical property and corrosion behavior of the AlSi10Mg alloy fabricated by selective laser melting(SLMed-AlSi10Mg) after different post heat treatment(PHT) of direct aging(DA), solid solution(T4)and solid solution + aging(T6) were investigated. The microstructural characterization revealed that the porosity of the SLMed-AlSi10Mg was increased from 0.41 ± 0.04 % to 3.09 ± 0.11 % with increasing temperature. The Asbuilt and DA-treated samples exhibited a microstructure of α-Al matrix surrounded with continuous Si networks,whereas the T4-treated and T6-treated samples presented a microstructure of α-Al matrix surrounded with discrete Si particles. The microhardness, strength and work hardening rate of the SLMed-AlSi10Mg increased in the order of T4-treated sample < T6-treated sample < As-built sample < DA-treated sample(a reverse order was found for the elongation), which was due to the precipitation of nanoscale Si particles after DA treatment and the softening of α-Al matrix after T4 and T6 treatments. The corrosion resistance of the SLMed-AlSi10Mg was obviously deteriorated after T4 and T6 treatments compared with DA treatment, which was caused by the changes in Si morphology, residual stress and porosity.

关键词： Selective laser melting AlSi10Mg alloy Post heat treatment Microstructure Mechanical property Corrosion behavior

Unbalanced sharing: a threshold implementation of SM4

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Science China(Information Sciences) 2021年第5期64卷 218-220页

作者： Man wei Siwei SUN zihao wei Lei HU State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences Data Assurance and Communication Security Research Center Chinese Academy of Sciences School of Cyber Security University of Chinese Academy of Sciences

Dear editor,In recent years, we have witnessed a rapid development of the side-channel attacks, which deviate from the traditional block-box model and exploit the leakages of cryptographic devices. Among those attacks, the so-called differential power analysis (DPA) exploiting the correlation between the instantaneous power consumption and the sensitive intermediate values of a cryptographic algorithm is one of the most powerful techniques [1].

关键词： Side channel analysis Masking Threshold implementation SM4 DPA