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Full-parameter constrained parsimonious subspace identification with steady-state information for DC–DC converters

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Control Theory and Technology 2024年第2期22卷 173-183页

作者： jie hou Zhen Yang Taifu Li Huiming Wang Jincheng Jiang Xiaolei Chen College of Automation Chongqing University of Posts and TelecommunicationsChongqing400065China School of Electrical and Information Engineering Chongqing University of Science and TechnologyChongqing401331China

A full-parameter constrained parsimonious subspace identification method that incorporates the steady-state a priori infor-mation of the system is proposed to model the DC-DC converters.A parsimonious model with fewer parameters is used to represent the system,and then an optimal weighted methods is used to estimate the system parameters matrices by taking into account both dynamical data and steady-state *** with traditional data-driven methods for DC-DC convert-ers,the subspace-based method can simultaneously estimate model structure and parameter with appropriate computational ***,compared with the traditional full-parameter constrained subspace approach,the proposed algorithm can accurately estimate the system parameters with a smaller *** experimental results on a DC-DC synchronous buck converter verify the effectiveness and superiority of the proposed method.

关键词： System identification Constrained identification DC-DC converters Subspace identification

The Goldbach Conjecture Is True

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Open Journal of Discrete Mathematics 2024年第3期14卷 29-41页

作者： jie hou HQ Building Design Inc. Oshawa Canada

Let 2m>2, m∈ℤ, be the given even number of the Strong Goldbach Conjecture Problem. Then, m can be called the median of the problem. So, all Goldbach partitions (p,q)exist a relationship, p=m−dand q=m+d, where p≤qand d is the distance from m to either p or q. Now we denote the finite feasible solutions of the problem as S(2m)={ (2,2m−2),(3,2m−3),⋅⋅⋅,(m,m) }. If we utilize the Eratosthenes sieve principle to efface those false objects from set S(2m)in pistages, where pi∈P, pi≤2m, then all optimal solutions should be found. The Strong Goldbach Conjecture is true since we proved that at least one optimal solution must exist to the problem. The Weak Goldbach Conjecture is true since it is a special case of the Strong Goldbach Conjecture. Therefore, the Goldbach Conjecture is true.

关键词： Median The Feasible Goldbach Partitions The Optimal Goldbach Partitions Congruences Effacement

Fusarium mycotoxins:The major food contaminants

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mLife 2024年第2期3卷 176-206页

作者： Zheng Qu Xianfeng Ren Zhaolin Du jie hou Ye Li Yanpo Yao Yi An Agro‐Environmental Protection Institute Ministry of Agriculture and Rural AffairsTianjinChina Institute of Quality Standard and Testing Technology for Agro‐Products Shandong Academy of Agricultural SciencesJinanChina

Mycotoxins,which are secondary metabolites produced by toxicogenic fungi,are natural food toxins that cause acute and chronic adverse reactions in humans and *** genus Fusarium is one of three major genera of mycotoxin‐producing ***,fumonisins,and zearalenone are the major Fusarium mycotoxins that occur *** mycotoxins have the potential to infiltrate the human food chain via contamination during crop production and food processing,eventually threatening human *** occurrence and development of Fusarium mycotoxin contamination will change with climate change,especially with variations in temperature,precipitation,and carbon dioxide *** address these challenges,researchers have built a series of effective models to forecast the occurrence of Fusarium mycotoxins and provide guidance for crop *** mycotoxins frequently exist in food products at extremely low levels,thus necessitating the development of highly sensitive and reliable detection *** successful detection methods have been developed to meet the requirements of various situations,and an increasing number of methods are moving toward highthroughput *** Fusarium mycotoxins cannot be completely eliminated,numerous agronomic,chemical,physical,and biological methods can lower Fusarium mycotoxin contamination to safe levels during the preharvest and postharvest *** theoretical innovations and technological advances have the potential to facilitate the development of comprehensive strategies for effectively managing Fusarium mycotoxin contamination in the future.

关键词： climate change Fusarium mycotoxin management strategy mycotoxin detection

Epidermal microorganisms contributed to the toxic mechanism of nZVI and TCEP in earthworms by robbing metal elements and nutrients

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Eco-Environment & Health 2024年第1期3卷 80-88页

作者： jie hou Meirui Yang Xinyue Wu Qiqi Chen Yuqi Lu Jianying Zhang Daohui Lin Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Department of Environmental ScienceZhejiang UniversityHangzhou 310058China Zhejiang Ecological Civilization Academy Anji 313300China National Demonstration Center for Experimental Environment and Resources Education(Zhejiang University) Hangzhou 310058China

Disrupting effects of pollutants on symbiotic microbiota have been regarded as an important mechanism of host toxicity,with most current research focusing on the intestinal *** fact,the epidermal microbiota,which participates in the nutrient exchange between hosts and environments,could play a crucial role in host toxicity via community *** compare the contributions of intestinal and epidermal symbiotic microorganisms to host toxicity,this study designed single and combined scenarios of soil contamination[nano zerovalent iron(nZVI)and tris(2-chloroethyl)phosphate(TCEP)],and revealed the coupling mechanisms between intestinal/epidermal symbiotic bacterial communities and earthworm toxicological *** analysis showed that 15%of intestinal microbes were highly correlated with host endpoints,compared to 45%of epidermal microbes showing a similar *** comparisons revealed that key species on the epidermis were mainly heterotrophic microbes with genetic abilities to utilize metal elements and carbohydrate *** verifications demonstrated that when facing the co-contamination of nZVI and TCEP,certain symbiotic microorganisms became dominant and consumed zinc,copper,and manganese along with saccharides and amino acids,which may be responsible for the nutritional deficiencies in the host *** findings can enrich the understanding of the coupling relationship between symbiotic microorganisms and host toxicity,highlighting the importance of epidermal microorganisms in host resistance to environmental pollution.

关键词： Microbial community Host Soil pollution Joint toxicity Heterotrophic function

《马克·吐温夏威夷来信》中的文学地图与社会表征

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南开学报（哲学社会科学版） 2024年第5期 138-146页

作者：侯杰南开大学外国语学院天津300071

由文字构成的借喻性文学地图本质上是一种社会表征,具有锚定和具体化等社会表征的运行机制,在被构建的“真实性”的保护下隐秘地为权力话语服务,参与空间秩序生产。通过分析马克·吐温在《马克·吐温夏威夷来信》等早期游记作品中绘制... 详细信息

由文字构成的借喻性文学地图本质上是一种社会表征,具有锚定和具体化等社会表征的运行机制,在被构建的“真实性”的保护下隐秘地为权力话语服务,参与空间秩序生产。通过分析马克·吐温在《马克·吐温夏威夷来信》等早期游记作品中绘制的文学地图,可以剥去这层“真实性”外衣,揭示作为社会表征的文学地图如何对他者、民族身份和国家空间发挥建构作用,并揭示吐温的夏威夷文学地图如何为美国之后占领和吞并夏威夷群岛奠定了话语基础。

关键词：文学地图社会表征锚定具体化建构

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明清福建商人捐资修谱研究

古代文明（中英文） 2024年第3期18卷 121-129,159页

作者：侯捷西南大学历史文化学院重庆400715

明清时期,福建商人捐资修谱行为大量出现,并呈现递增的态势。在这一过程中,宗族于族规、谱例卷中制定出一套依照捐资多寡决定商贾是否可以入谱立传的新标准,商人传记也从无足轻重变成了宗族修谱的重点,谱传中的商贾形象大为改观。这些... 详细信息

明清时期,福建商人捐资修谱行为大量出现,并呈现递增的态势。在这一过程中,宗族于族规、谱例卷中制定出一套依照捐资多寡决定商贾是否可以入谱立传的新标准,商人传记也从无足轻重变成了宗族修谱的重点,谱传中的商贾形象大为改观。这些变动都有益于福建商人营商自信心的增强、贸易网络的扩大及社会地位的提升,成为推动明清福建商人发展壮大的积极因素。

关键词：明清福建商人捐资修谱商人传记

“阴阳和谐”与“色进于礼”:《关雎》文本体系及其文明内涵

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河北学刊 2024年第4期44卷 63-70页

作者：侯捷飞全国哲学社会科学工作办公室

作为《诗》三百的首篇,《关雎》存在一个以“阴阳和谐”为核心元素的意群体系,具有儒家所倡导的人、事、物运转“至诚无息”“发而皆中节”、各安其位而阴阳协和的“致中和”意义。《关雎》具有极强的喻示性与象征性,反映出人与物、人... 详细信息

作为《诗》三百的首篇,《关雎》存在一个以“阴阳和谐”为核心元素的意群体系,具有儒家所倡导的人、事、物运转“至诚无息”“发而皆中节”、各安其位而阴阳协和的“致中和”意义。《关雎》具有极强的喻示性与象征性,反映出人与物、人与人、人与社会三者联动的和谐秩序,描述了人将兼美兼善价值观念付诸实践后,人、事、物各自圆融而又互映共存、臻于完美的状态。诗中“君子”对“淑女”追求过程中“友之”“乐之”与儒家对事物“知之”“好之”“乐之”三境界的内在逻辑一致,《关雎》突出的音乐属性亦呼应并彰显“色进于礼”的文本意义。深入研究以《诗经》为代表的中华优秀传统文化,探索其思想理念,阐释其文明价值与现实意义,对于深入推进中国特色哲学社会科学“三大体系”建设,贯彻落实“两个结合”,在新的历史起点上建设中华民族现代文明,无疑具有积极的启示意义。

关键词：《关雎》意群体系 “友之” “乐之” 文明内涵

pH值对纤维素纳米晶液晶形态及流变性能的影响

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高校化学工程学报 2024年第1期38卷 135-144页

作者：陈启帆侯洁徐化能江南大学食品学院江苏无锡214122

为研究纤维素纳米晶(CNC)悬浮液在不同pH值及质量分数下的相变行为,使用偏光显微镜确定CNC液晶相的形态特征,获得了CNC形成向列相、胆甾相和双折射玻璃相的相图。通过稳态剪切和大幅振荡剪切测定了CNC体系的流变学性质,并利用傅里叶流... 详细信息

为研究纤维素纳米晶(CNC)悬浮液在不同pH值及质量分数下的相变行为,使用偏光显微镜确定CNC液晶相的形态特征,获得了CNC形成向列相、胆甾相和双折射玻璃相的相图。通过稳态剪切和大幅振荡剪切测定了CNC体系的流变学性质,并利用傅里叶流变学分析体系流变行为与其微观结构演变之间的关系。结果表明,添加酸或碱能屏蔽CNC间的静电排斥作用,提高体系的凝胶化作用和非线性黏弹性,从而使向列相与胆甾相区域表现出明显的下降趋势。

关键词：纤维素纳米晶溶致型液晶流变学胶体自组装

Superconducting state in Ba_((1-x)) Sr_(x)Ni_(2)As_(2) near the quantum critical point

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Chinese Physics B 2024年第6期33卷 488-493页

作者：余承峰张宗源宋林兴吴彦玮袁小秋侯杰涂玉兵侯兴元李世亮单磊 Information Materials and Intelligent Sensing Laboratory of Anhui Province Institutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China Key Laboratory of Structure and Functional Regulation of Hybrid Materials(Anhui University) Ministry of EducationHefei 230601China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

In the phase diagram of the nickel-based superconductor Ba_(1-x)Sr_(x)Ni_(2)As_(2),T_(C) has been found to be enhanced sixfold near the quantum critical point(QCP) x=0.71 compared with the parent ***,the mechanism is still under ***,we report a detailed investigation of the superconducting properties near the QCP(x≈0.7) by utilizing scanning tunneling microscopy and *** temperature-dependent superconducting gap and magnetic vortex state were obtained and analyzed in the framework of the Bardeen-Cooper-Schrieffer *** ideal isotropic s-wave superconducting gap excludes the long-speculated nematic fluctuations while preferring strong electron-phonon coupling as the mechanism for T_(C) enhancement near the *** lower than expected gap ratio of Δ/(k_(B) T_(C)) is rooted in the fact that Ba_(1-x)Sr_(x)Ni_(2)As_(2) falls into the dirty limit with a serious pair breaking effect similar to the parent compound.

关键词： nickel-based superconductor electron–phonon coupling dirty limit scanning tunneling microscopy/spectroscopy