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Food Quality and Safety 2024年第1期8卷 135-144页

作者： yinan wang Fei Zhou Hui wang Jinping Zhang Hongxia Xu Research Institute of Subtropical Forestry Chinese Academy of ForestryHangzhouChina Chun‘an County Thousand-island Lake Forest Farm HangzhouChina

Objectives:The chemical constituents of Poria cocos grown with different substrates vary significantly;thus,identifying and comparing their biomarkers are *** and Methods:Herein,the chemical constituents of Poria cocos obtained with five different substrates were assessed using gas chromatography–ion mobility spectrometry(GC-IMS),high-performance liquid chromatography and multivariate statistical ***:The content of moisture,ash,alcohol-soluble matter,and heavy metals,except for those of the miscellaneous wood Poria cocos,conform to the specifications defined in the Chinese Pharmacopoeia(Edition 2020),and the polysaccharide contents are all greater than 57%.Conclusions:Based on GC-IMS and the established fingerprints,87 compounds were detected,70 of which were identified in each *** statistical analysis revealed seven compounds(two esters,three alcohols,and two aldehydes),which could be considered as potential marker compounds for discrimination.

关键词： Poria cocos cultivation material pharmacodynamic component gas chromatography-ion mobility spectrometry(GC-IMS) volatile compound.

A Review of Computing with Spiking Neural Networks

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Computers, Materials & Continua 2024年第3期78卷 2909-2939页

作者： Jiadong Wu yinan wang Zhiwei Li Lun Lu Qingjiang Li College of Electronic Science and Technology National University of Defense TechnologyChangsha410073China

Artificial neural networks(ANNs)have led to landmark changes in many fields,but they still differ significantly fromthemechanisms of real biological neural networks and face problems such as high computing costs,excessive computing power,and so *** neural networks(SNNs)provide a new approach combined with brain-like science to improve the computational energy efficiency,computational architecture,and biological credibility of current deep learning *** the early stage of development,its poor performance hindered the application of SNNs in real-world *** recent years,SNNs have made great progress in computational performance and practicability compared with the earlier research results,and are continuously producing significant *** there are already many pieces of literature on SNNs,there is still a lack of comprehensive review on SNNs from the perspective of improving performance and practicality as well as incorporating the latest research *** from this issue,this paper elaborates on SNNs along the complete usage process of SNNs including network construction,data processing,model training,development,and deployment,aiming to provide more comprehensive and practical guidance to promote the development of ***,the connotation and development status of SNNcomputing is reviewed systematically and comprehensively from four aspects:composition structure,data set,learning algorithm,software/hardware development *** the development characteristics of SNNs in intelligent computing are summarized,the current challenges of SNNs are discussed and the future development directions are also *** research shows that in the fields of machine learning and intelligent computing,SNNs have comparable network scale and performance to ANNs and the ability to challenge large datasets and a variety of *** advantages of SNNs over ANNs in terms of energy efficiency and spatial-temporal data processing

关键词： Spiking neural networks neural networks brain-like computing artificial intelligence learning algorithm

Slicing of large-size single crystals by ultrafast laser with external stress assistance

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CHINESE OPTICS LETTERS 2024年第8期22卷 081601-081601页

作者： wang, Lifeng Liu, Lili wang, yinan Li, Xun Li, Chenchen Li, Ming Chinese Acad Sci Xian Inst Opt & Precis Mech State Key Lab Transient Opt & Photon Xian 710119 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

The existing single-crystal slicing techniques result in significant material wastage and elevate the production cost of premium-quality thin slices of crystals. Here we report (for the first time, to our knowledge) an approach for vertical slicing of large-size single-crystal gain materials by ultrafast laser. By employing aberration correction techniques, the optimization of the optical field distribution within the high-refractive-index crystal enables the achievement of a continuous laser-modified layer with a thickness of less than 10 mu m, oriented perpendicular to the direction of the laser direction. The compressed focal spot facilitates crack initiation, enabling propagation under external forces, ultimately achieving the successful slicing of a Phi 12 mm crystal. The surface roughness of the sliced Yb:YAG is less than 2.5 mu m. The results illustrate the potential of low-loss slicing strategy for single-crystal fabrication and pave the way for the future development of thin disk lasers.

关键词： single-crystal gain materials ultrafast laser slicing YAG aberration correction FEMTOSECOND LASER DEFORMATION MECHANISM YAG

Microphysical Characteristics of Rainfall Based on Long-Term Observations with a 2DVD in Yangbajain,Tibet

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Advances in Atmospheric Sciences 2024年第9期41卷 1721-1734页

作者： Ming LI Yongheng BI Yonghai SHEN yinan wang Ciren Nima Tianlu CHEN Daren LYU Key Laboratory for Cosmic Rays of the Ministry of Education Tibet UniversityLhasa 850000China Key Laboratory of Middle Atmosphere and Global Environment Observation(LAGEO) Institute of Atmospheric PhysicsChinese Academy of ScienceBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

Raindrop size distribution(DSD)plays a crucial role in enhancing the accuracy of radar quantitative precipitation estimates in the Tibetan Plateau(TP).However,there is a notable scarcity of long-term,high-resolution observations in this *** address this issue,long-term observations from a two-dimensional video disdrometer(2DVD)were leveraged to refine the radar and satellite-based algorithms for quantifying precipitation in the hinterland of the *** was observed that weak precipitation(R<1,mm h-1)accounts for 86%of the total precipitation time,while small raindrops(D<2 mm)comprise 99%of the total raindrop ***,the average spectral width of the DSD increases with increasing rain *** DSD characteristics of convective and stratiform precipitation were discussed across five different rain rates,revealing that convective precipitation in Yangbajain(YBJ)exhibits characteristics similar to maritime-like *** constrained relationships between the slopeΛand shapeμ,D_(m)and N_(w)of gamma DSDs were ***,we established a correlation between the equivalent diameter and drop axis ratio and found that raindrops on the TP attain a nearly spherical ***,the application of the rainfall retrieval algorithms of the dual-frequency precipitation radar in the TP is improved based on the statistical results of the DSD.

关键词： Tibetan Plateau raindrop size distribution 2DVD dual frequency radar microphysical features

“乐水行舟”:苏轼的性命观及其在中国艺术中的回响

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北京大学学报(哲学社会科学版) 2024年第5期61卷 75-85页

作者：王一楠中国艺术研究院艺术学研究所

“乐水行舟”意象是苏轼性命观念的重要载体，苏轼通过这一主题探求同际遇变化及生命流逝的和解之方。舟和水分别触及苏轼关于生存困境和君子本性的思考，“乐水行舟”内含“尽性至命”“性命一如”并获终极安顿的完整语境。苏轼对“乐... 详细信息

“乐水行舟”意象是苏轼性命观念的重要载体，苏轼通过这一主题探求同际遇变化及生命流逝的和解之方。舟和水分别触及苏轼关于生存困境和君子本性的思考，“乐水行舟”内含“尽性至命”“性命一如”并获终极安顿的完整语境。苏轼对“乐水行舟”的书写影响有二：舟与水的视觉情境因凝集苏轼个人命运而具有典范意义，其象征意味为后世众多东坡乐水图像共享；有关性命的哲思赋予中国古代艺术中常见的渔隐和舟游主题以丰富内涵，在后者对“乐水行舟”的表现中，水与舟的组合亦具有变与不变、有限与无限的意义关联。探究苏轼在这些常见的古代艺术现象中扮演的角色，有助于深化今人对中国文艺思想和艺术哲学的认知。

关键词：性命赤壁海上苏文人画图式

考虑多重因素叠加情景的能源清洁低碳转型风险评估

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中国电力 2024年第3期57卷 183-189页

作者：王轶楠卢静陈星彤代红才国网能源研究院有限公司北京102209

当前中国能源清洁低碳转型主要面临可持续供应、社会性、地缘性、制裁性等4个方面风险。通过建立能源清洁低碳转型的风险评估模型,按照“两两叠加、三三叠加、全部叠加”的组合方式,排列出11种风险因素叠加情景,基于层次分析法,研判了... 详细信息

当前中国能源清洁低碳转型主要面临可持续供应、社会性、地缘性、制裁性等4个方面风险。通过建立能源清洁低碳转型的风险评估模型,按照“两两叠加、三三叠加、全部叠加”的组合方式,排列出11种风险因素叠加情景,基于层次分析法,研判了能源清洁低碳转型中各类情景出现的概率及造成的影响程度,据此提出电网企业作为服务能源清洁低碳转型和构建新型电力系统的骨干企业,应适度超前加强电网建设和调节性资源开发,推动构建面向能源清洁低碳转型的风险预警、政策动态评估以及关键原材料和“卡脖子”技术研发储备机制,重点防范双内生风险和双外部风险影响。

关键词：能源转型清洁低碳多重因素叠加情景风险研判

现代金属雕塑实验教学的创新思考——以清华大学美术学院实验课程为例

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实验技术与管理 2024年第2期41卷 228-234页

作者：王轶男张晓董书兵清华大学美术学院北京100084 清华大学艺术博物馆北京100084

现代金属雕塑作为20世纪西方现代主义艺术的主要形式之一,对中国的现代雕塑和美术教育产生了显著影响。国内的雕塑材料教学经历了从注重工艺“技术性”到挖掘材料“可能性”的演变。在西方现代艺术观念的长期影响下,实践教学难免会出现... 详细信息

现代金属雕塑作为20世纪西方现代主义艺术的主要形式之一,对中国的现代雕塑和美术教育产生了显著影响。国内的雕塑材料教学经历了从注重工艺“技术性”到挖掘材料“可能性”的演变。在西方现代艺术观念的长期影响下,实践教学难免会出现文化主体性缺失、本土文化资源与价值体系构建不完善等问题。结合清华大学美术学院金属雕塑材料课程的教学经验,从更新实验教学理念、设置个性化教学方法、构建本土文化价值体系等方面进行了一系列创新思考和教学实践,为建设符合时代要求的高质量金属雕塑实验教学提供参考。

关键词：现代金属雕塑现代主义材料实验教学文化主体性

水利工程甲级质量检测单位“双随机、一公开”质量保证体系不健全问题剖析

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工程质量 2024年第9期42卷 6-10页

作者：王世忠王逸男黄河水利委员会黄河水利科学研究院河南郑州450003

2020 年—2022 年水利工程建设甲级质量检测单位“双随机、一公开”抽查工作中,“质量保证体系不健全”问题几乎逢查必中,并有逐年递增趋势。论文从相关规章条文要求入手,理清质量保证体系和管理体系概念,分析存在问题原因,规避“质量... 详细信息

2020 年—2022 年水利工程建设甲级质量检测单位“双随机、一公开”抽查工作中,“质量保证体系不健全”问题几乎逢查必中,并有逐年递增趋势。论文从相关规章条文要求入手,理清质量保证体系和管理体系概念,分析存在问题原因,规避“质量保证体系不健全”问题发生。

关键词： “双随机、一公开” 质量保证体系管理体系甲级质量检测单位

基于情感化设计的“非遗”汴绣App设计策略研究

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艺术科技 2024年第11期37卷 128-130页

作者：王怡楠李剑江南大学设计学院江苏无锡214122

目的:汴绣艺术不仅承载着深厚的文化底蕴,还是几千年人文历史的积淀,是中华优秀传统文化的重要组成部分。文章从情感化设计三层次出发,提出“非遗”汴绣App设计策略,使用户能够全方位、多角度地欣赏汴绣作品的细腻与精美,深入了解其背... 详细信息

目的:汴绣艺术不仅承载着深厚的文化底蕴,还是几千年人文历史的积淀,是中华优秀传统文化的重要组成部分。文章从情感化设计三层次出发,提出“非遗”汴绣App设计策略,使用户能够全方位、多角度地欣赏汴绣作品的细腻与精美,深入了解其背后丰富的艺术价值和复杂的制作工艺,从视觉到感官再到情感层面,全面理解与深刻体验汴绣文化。方法:文章基于情感化设计理念,提取“非遗”汴绣中物质层、行为层、精神层的典型文化要素,明确其与App设计中用户的感官体验、互动体验、情感体验之间的映射关系,进而解构与重组文化符号。结果:通过分析汴绣传播现状,针对现存问题,以情感化设计三层次理论确立“非遗”汴绣App情感化设计的具体策略,进一步探索“非遗”App设计新模式,扩展“非遗”汴绣传播与传承方式。结论:情感化设计的深度运用,为汴绣“非遗”的保护与传播带来了变革,也开启了传统艺术与现代科技交融的新篇章。在感官层面,应注重对汴绣文化符号的选择与提炼;在行为层面,采取游戏化的交互设计形式,寓教于乐,为用户带来更加深刻的情感体验;在反思层面,深挖汴绣文化价值,融合叙事性原则,唤醒用户的情感共鸣。情感化设计应用于“非遗”汴绣App设计,为“非遗”汴绣的当代传承提供了新思路。

关键词：情感化设计 “非遗”汴绣 App设计

基于商用微波链路反演降雨的空间插值方法对比研究

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水文 2024年第1期44卷 50-56,69页

作者：叶滋润孔祥兵郭凯王逸男郑州大学水利与土木工程学院河南郑州450001 黄河水利委员会黄河水利科学研究院河南郑州450003 水利部黄土高原水土保持重点实验室河南郑州450003 河海大学水文与水资源学院江苏南京210098

为探究适宜于商用微波链路降雨监测数据的空间插值方法,基于无线微波雨衰特性经验模型,分析不同线状降雨数据转换为点状降雨数据情景下,反距离权重法、克里金法和趋势面法对降雨空间插值的反演精度。研究结果表明:微波链路越密集,条数越... 详细信息

为探究适宜于商用微波链路降雨监测数据的空间插值方法,基于无线微波雨衰特性经验模型,分析不同线状降雨数据转换为点状降雨数据情景下,反距离权重法、克里金法和趋势面法对降雨空间插值的反演精度。研究结果表明:微波链路越密集,条数越多,其趋势的一致性越好;在微波线状数据转换为点状数据的五种情景中,将微波链路以200m为间隔概化为具体的降雨监测点时,空间插值效果较好;趋势面法的空间插值效果较好,反距离权重法次之,克里金法最差。研究结果明晰了线状降雨数据转换为格网型空间数据的原则,为商用微波链路组网构建空间二维雨量场提供了支撑,对提高线状降雨监测产品兼容性具有重要意义。

关键词：空间插值商用微波链路雨衰降雨反演