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New signature of low mass Z'in J/ψdecays

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Chinese Physics C 2024年第8期48卷 1-5页

作者： Chao-Qiang Geng chia-wei Liu Jiabao Zhang School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Institute of Theoretical Physics University of Chinese Academy of SciencesBeijing 100190China

We explored a new approach to search for a low-mass Z′particle through J/ψdecays by identifying its existence through parity-violating phenomena in the isospin-violating final states ofΛΣ¯^(0)and the corresponding charge conjugated states ofΛΣ¯^(0).Our investigation centered on a generation-independent and leptophobic Z′with mass below 10 *** the present experimental conditions at Beijing Spectrometer III(BESIII)and the anticipated opportunities at the Super Tau Charm Factory(STCF),we conducted Monte-Carlo simulations to predict possible events at both ***,we foresee a substantial enhancement in the precision of the lower limit estimation ofαNP as well as a reduction in statistical uncertainty with upcoming STCF ***,it is essential to highlight that a null result in the measurement ofαNP would impose stringent constraints,requiring the Z′−q−q couplings to be in the order of 10^(−2).

关键词： Z′ parity violation J/ψ

Time-reversal asymmetries in Λ_(b)→Λ(→pπ^(−))ℓ^(+)ℓ^(−)

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Chinese Physics C 2024年第3期48卷 1-14页

作者：耿朝强刘佳韦魏正乙 School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China University of Chinese Academy of Sciences Beijing 100190China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China

We study the decays ofΛb→Λ(→pπ^(−))ℓ^(+)ℓ^(−)withℓ=(e,μ,τ).We examine the full angular distributions with polarizedΛb,where the T-odd observables are *** discuss the possible effects of new physics(NP)and find that the T-odd observables are sensitive to them as they vanish in the standard *** attention is given to the interference of(pseudo)scalar operators with(axial)vector operators in polarized Λ_(b)→Λ(→pπ^(−))τ^(+)τ^(−),which are studied for the first *** effects are proportional to the lepton masses and therefore may evade the constraint from Λ_(b)→Λ(→pπ^(−))μ^(+)μ^(−) at the LHCb ***Λ_(b)→Λ(→pπ^(−))τ^(+)τ^(−) is uncontaminated by the charmonia resonance,it provides a clean background to probe *** addition,we show that the experimental central value of K10 in Λ_(b)→Λ(→pπ^(−))μ^(+)μ^(−) at the LHCb can be explained by the NP case,which couples to the right-handed quarks and *** polarization fraction of Λ_(b) at the LHCb is found to be consistent with zero regardless of the NP scenarios.

关键词： time reversal asymmetry angular distribution new physics T-odd correlation

马来西亚东部Setiu潟湖1970年以来沉积环境演化及其对ENSO的响应

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海洋学报 2024年

作者：赵周平李超骆正骅 Nicholas Ng chia wei 戴璐海洋地质国家重点实验室(同济大学)

马来半岛位于低纬热带地区，厄尔尼诺-南方涛动（El Nino-Southern Oscillation，简称ENSO）如何影响该区域的气候，尤其是降水仍然存在争议。本文以马来半岛东北部登嘉楼州Setiu潟湖钻孔NTT-3为研究对象，通过粒度、总有机碳及总氮含量... 详细信息

马来半岛位于低纬热带地区，厄尔尼诺-南方涛动（El Nino-Southern Oscillation，简称ENSO）如何影响该区域的气候，尤其是降水仍然存在争议。本文以马来半岛东北部登嘉楼州Setiu潟湖钻孔NTT-3为研究对象，通过粒度、总有机碳及总氮含量、C/N比值和XRF岩心扫描等分析，探讨该钻孔的沉积环境变化及其对ENSO的响应。研究结果显示，钻孔记录中自1970年前后（84 cm处）出现两种不同的变化趋势。1970年之前钻孔下部沉积物粒度、有机和无机地球化学特征趋势波动明显，沉积速率较低。而1970年以来，潟湖沉积环境总体稳定，沉积物中的有机组分主要来自红树林，同时伴有河流输入的淡水浮游植物的贡献。频谱分析结果显示1970年以来钻孔上部存在明显的ENSO周期变化。强El Nino现象基本对应低Zr/Rb比值和低Zr/Ti比值，而强La Nina现象基本对应高Zr/Rb比值和Zr/Ti比值。该结论不仅支持了现代观测对马来半岛东部沿海地区气候变化的认识，同时也在地质记录中发现了ENSO变化的直接证据，对全面认识和理解ENSO对亚洲气候变化的影响、区域陆海相互作用过程和环境响应等方面具有重要现实意义。

关键词： Setiu潟湖沉积记录频谱分析 ENSO

Effect of Carboxymethyl Cellulose(CMC) Functionalization on Dispersion, Mechanical, and Corrosion Properties of CNT/Epoxy Nanocomposites

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Chinese Journal of Polymer Science 2023年第8期41卷 1277-1286,I0010页

作者： Da-wei Zhang Leonard chia Ying Huang Department of Civil Construction and Environmental EngineeringNorth Dakota State UniversityFargo 58108USA

Carbon nanotube(CNT)/epoxy nanocomposites have a great potential of possessing many advanced ***,the homogenization of CNT dispersion is still a great challenge in the research field of *** study applied a novel dispersion agent,carboxymethyl cellulose(CMC),to functionalize CNTs and improve CNT dispersion in *** effectiveness of the CMC functionalization was compared with mechanical mixing and a commonly used surfactant,sodium dodecylbenzene sulfonate(Na DDBS),regarding dispersion,mechanical and corrosion properties of CNT/epoxy nanocomposites with three different CNT concentrations(0.1%,0.3%and 0.5%).The experimental results of Raman spectroscopy,particle size analysis and transmission electron microscopy showed that CMC functionalized CNTs reduced CNT cluster sizes more efficiently than Na DDBS functionalized and mechanically mixed CNTs,indicating a better CNT *** peak particle size of CMC functionalized CNTs reduced as much as 54%(0.1%CNT concentration)and 16%(0.3%CNT concentration),compared to mechanical mixed and Na DDBS functionalized *** of the better dispersion,it was found by compressive tests that CNT/epoxy nanocomposites with CMC functionalization resulted in 189%and 66%higher compressive strength,224%and 50%higher modulus of elasticity than those with mechanical mixing and Na DDBS functionalization respectively(0.1%CNT cencentration).In addition,electrochemical corrosion tests also showed that CNT/epoxy nanocomposites with CMC functionalization achieved lowest corrosion rate(0.214 mpy),the highest corrosion resistance(201.031Ω·cm^(2)),and the lowest porosity density(0.011%).

关键词： CNT/epoxy composites Carboxymethyl cellulose Dispersion Mechanical properties Corrosion properties

无过渡金属或无光催化剂条件下可见光促进喹喔啉酮C(3)—H官能团化研究进展

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有机化学 2024年第1期44卷 111-136页

作者：董江湖宣良明王池赵晨熙王海峰严琼姣汪伟陈芬儿武汉工程大学药物研究院武汉430205 复旦大学化学系上海200433

喹喔啉酮及其衍生物是一类重要的含氮杂环化合物,这种特殊的杂环骨架广泛存在于各种天然产物、药物分子以及功能材料中.近年来,喹喔啉酮的官能团化引起了化学工作者的广泛关注,其中通过C—H官能团化构建3-官能团化的喹喔啉酮取得了重要... 详细信息

喹喔啉酮及其衍生物是一类重要的含氮杂环化合物,这种特殊的杂环骨架广泛存在于各种天然产物、药物分子以及功能材料中.近年来,喹喔啉酮的官能团化引起了化学工作者的广泛关注,其中通过C—H官能团化构建3-官能团化的喹喔啉酮取得了重要进展.光氧化还原催化可利用绿色清洁的光能在较为温和的条件下实现有机化合物的合成与转化,因此,越来越多的光催化体系被开发用于喹喔啉酮的官能团化.简单高效的无过渡金属或无光催化剂的反应体系非常符合绿色化学和可持续发展的要求,已成为喹喔啉酮类化合物官能团化强有力的工具,同时也受到了很多学者的青睐.对近五年来无过渡金属或无光催化剂可见光促进喹喔啉酮的C(3)位官能团化领域所取得的研究进展进行了综述,对反应机理和氧化还原淬灭过程进行了总结,并对该领域所面临的挑战和机遇进行了展望和探讨.

关键词：喹喔啉酮光氧化还原无过渡金属无光催化剂 C—H官能团化

Insights on the molecular mechanism of neuroprotection exerted by edible bird’s nest and its bioactive constituents

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Food Science and Human Wellness 2023年第4期12卷 1008-1019页

作者： weiyi Chu chia wei Phan Seng Joe Lim Abdul Salam Babji Department of Pharmaceutical Life Sciences Faculty of PharmacyUniversiti MalayaKuala Lumpur 50603Malaysia Clinical Investigation Centre University Malaya Medical CentreLembah Pantai Kuala Lumpur 59100Malaysia Mushroom Research Centre Universiti MalayaKuala Lumpur 50603Malaysia Department of Food Sciences Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaUKM BangiSelangor 43600Malaysia Innovation Centre for Confectionery Technology(MANIS) Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaUKM BangiSelangor 43600Malaysia

Neurodegenerative diseases are often associated with the accumulation of oxidative stress and *** bird’s nest(EBN)is a glycoprotein(sialylated mucin glycopeptides)found to be beneficial against neurodegenerative ***,anti-inflammatory,and anti-apoptotic properties of EBN in preserving neuronal cells were widely researched using in vitro and in vivo *** effects of EBN are often linked to its great number of antioxidants and anti-inflammatory *** compounds in EBN,especially sialic acid,add value to neurotrophic potential of EBN and contribute to neuronal repair and *** studies reporting the neuroprotective effects of EBN,their molecular mechanisms,and neuroactive composition were gathered in this review to provide better insights on the neuroprotective effects of EBN.

关键词： Antioxidant Composition Edible bird nest Neurodegenerative disease Neuroprotection Sialylated mucin glycopeptide

Folding metamaterials with extremely strong electromagnetic resonance

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Photonics Research 2022年第9期10卷 2215-2222页

作者： HARRY MIYOSI SILALAHI wei-FAN chiaNG YI-HONG SHIH WAN-YI wei JOU-YU SU chia-YI HUANG Department of Applied Physics Tunghai UniversityTaichung 40704China Department of Photonics Taiwan Cheng Kung UniversityTainan 70101China

Aqueous solutions cannot be detected using transmissive terahertz metamaterials because water strongly absorbs terahertz *** terahertz metamaterials are easier to integrate terahertz emitters and receivers into single and compact devices than reflective terahertz *** detection of aqueous solutions using transmissive terahertz metamaterials is a big *** work fabricates a transmissive terahertz metamaterial using a folding metamaterial comprising split-ring resonators(SRRs)with nano-profiles with a high aspect ratio *** folding metamaterial has a small transmittance of-49 d B at its resonance frequency,large transmittance contrast of approximately 6×10^(4)with respect to the transmittance of its substrate,large refractive index sensitivity of 647 GHz/RIU,and large quality factor of *** result arises from the nano-profiles of the *** nanoprofiles increase the surface areas of the SRRs,increasing their surface currents and enhancing the electromagnetic resonance of the folding *** folding metamaterial detects a 188-μm-thick rabbit-blood layer that is deposited on it,which cannot be detected by using a common *** result reveals that folding metamaterials have potential in detecting the products of live microorganisms with geometrical sizes up to several hundreds of micrometers,such as hydrogen gas,hydrocarbons,and antibodies.

关键词： resonance sizes integrate

Altered O-GlcNAcylation and mitochondrial dysfunction,a molecular link between brain glucose dysregulation and sporadic Alzheimer's disease

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Neural Regeneration Research 2023年第4期18卷 779-783页

作者： chia-wei Huang Nicholas C.Rust Hsueh-Fu Wu Gerald W.Hart Complex Carbohydrate Research Center University of GeorgiaAthensGAUSA Department of Biochemistry and Molecular Biology University of GeorgiaAthensGAUSA Center for Molecular Medicine University of GeorgiaAthensGAUSA

Alzheimer’s disease is a neurodegenerative disease that affected over 6.5 million people in the United States in 2021,with this number expected to double in the next 40 years without any sort of *** to its heterogeneity and complexity,the etiology of Alzheimer’s disease,especially sporadic Alzheimer’s disease,remains largely *** evidence suggests that brain glucose hypometabolism,preceding Alzheimer’s disease hallmarks,is involved in the pathogenesis of Alzheimer’s ***,we discuss the potential causes of reduced glucose uptake and the mechanisms underlying glucose hypometabolism and Alzheimer’s disease ***,decreased O-Glc NAcylation levels by glucose deficiency alter mitochondrial functions and together contribute to Alzheimer’s disease *** major problem with Alzheimer’s disease research is that the disease progresses for several years before the onset of any symptoms,suggesting the critical need for appropriate models to study the molecular changes in the early phase of Alzheimer’s disease ***,this review also discusses current available sporadic Alzheimer’s disease models induced by metabolic abnormalities and provides novel directions for establishing a human neuronal sporadic Alzheimer’s disease model that better represents human sporadic Alzheimer’s disease as a metabolic disease.

关键词： Alzheimer’s disease amyloid beta brain glucose deficiency glucose uptake hypometabolism mitochondrial dysfunction neurodegenerative disease neurons O-GlcNAc Tau

An Intelligent Recommendation System for Real Estate Commodity

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Computer Systems Science & Engineering 2022年第9期42卷 881-897页

作者： Tsung-Yin Ou Guan-Yu Lin Hsin-Pin Fu Shih-chia wei Wen-Lung Tsai Department of Marketing and Distribution Management National Kaohsiung University of Science and TechnologyKaohsiung824Taiwan College of Management National Kaohsiung University of Science and TechnologyKaohsiung824Taiwan Department of Information Management Asia Eastern University of Science and TechnologyNew Taipei220Taiwan

Most real estate agents develop new objects by visiting unfamiliar clients, distributing leaflets, or browsing other real estate trading website platforms,whereas consumers often rely on websites to search and compare prices when purchasing real property. In addition to being time consuming, this search processrenders it difficult for agents and consumers to understand the status changes ofobjects. In this study, Python is used to write web crawler and image recognitionprograms to capture object information from the web pages of real estate agents;perform data screening, arranging, and cleaning;compare the text of real estateobject information;as well as integrate and use the convolutional neural networkof a deep learning algorithm to implement image recognition. In this study, dataare acquired from two business-to-consumer real estate agency networks, i.e., theSinyi real estate agent and the Yungching real estate agent, and one consumer-toconsumer real estate agency platform, i.e., the, FiveNineOne real estate agent. Theresults indicate that text mining can reveal the similarities and differences betweenthe objects, list the number of days that the object has been available for sale onthe website, and provide the price fluctuations and fluctuation times during thesales period. In addition, 213,325 object amplification images are used as a database for training using deep learning algorithms, and the maximum image recognition accuracy achieved is 95%. The dynamic recommendation system for realestate objects constructed by combining text mining and image recognition systems enables developers in the real estate industry to understand the differencesbetween their commodities and other businesses in approximately 2 min, as wellas rapidly determine developable objects via comparison results provided by thesystem. Meanwhile, consumers require less time in searching and comparingprices after they have understood the commodity dynamic information, therebyallowing the

关键词： Real estate agency web crawler image comparison text mining deep learning real estate object dynamic recommendation system