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Catalytic behavior of Mo-Bi-Fe-Co-K-M-O(M=Ce,Gd,CeGd)catalysts for selective oxidation of isobutene

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Journal of Rare Earths 2024年第1期42卷 84-93,I0003页

作者： qinghui Li Huahua Zhao Jian yang Jun Zhao Liang yan Huanling Song Lingjun Chou State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China University of Chinese Academy of Sciences Beijing100049China

The further improvement of methacrolein(MAL)selectivity from isobutene(IB)oxidation is crucial and *** this study,based on the typical Mo-Bi-Fe-Co-K-O mixed metal oxide,the rare earth element Gd-doped,Ce-doped and CeGd co-doped catalysts were prepared by co-precipitation strategy to increase the selectivity of MAL from 47.9%to 49.8%,64.2% and 68.6%,*** order to elucidate in-depth the promoting effect of Ce and/or Gd,various characterizations were utilized including X-ray diffraction patterns(XRD),Raman,X-ray fluorescence spectrometry(XRF),X-ray photoelectron spectroscopy(XPS),O_(2)-temperature programmed desorption(O_(2)-TPD),H2-temperature programmed reduction(H2-TPR),CO_(2)-temperature programmed desorption(CO_(2)-TPD),IB-temperature programmed desorption(i-C4-TPD)and in-situ IB-Fourier transform infrared spectroscopy(IB-FTIR).Both Ce and Gd finely regulate the bulk and surface structure of the catalyst,thus altering the redox ability,oxygen mobility and storage ability and *** with Ce,Gd addition slightly regulates the variation of Co^(2+)/Co^(3+)redox couples,greatly enhances the interaction among the components on the catalyst,thus only increases the content of surface oxygen species and has little effect on their *** Cecontaining catalyst performs stronger oxygen storage and migration ability,thus leading to the overproduction of surface Odefectspecies,which are proposed to be the active sites for the production of MAL and *** CeGd co-doped catalyst possesses the proper content of surface Odefectspecies,thus exhibits much higher MAL ***,the promoting mechanism of Ce and/or Gd over IB oxidation is ***,this work is helpful for understanding the influence of rare earth elements on the structure of mixed metal oxides and the olefin selective oxidation reaction.

关键词： Mixed metal oxide catalyst Rare earth element Isobutene Selective oxidation Methacrolein

Unconventional Weyl exceptional contours in non-Hermitian photonic continua

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Photonics Research 2021年第12期9卷 2435-2442页

作者： qinghui yan QIAOLU CHEN LI ZHANG RUI XI HONGSHENG CHEN YIHAO yanG Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 310027China International Joint Innovation Center Key Laboratory of Advanced Micro/Nano Electronic Devices&Smart Systems of ZhejiangThe Electromagnetics Academy at Zhejiang UniversityZhejiang UniversityHaining 314400China

Unconventional Weyl points with topological charges higher than 1 can transform into various complex unconventional Weyl exceptional contours under non-Hermitian ***,theoretical studies of these exceptional contours have been limited to tight-binding ***,we propose to realize unconventional Weyl exceptional contours in photonic continua—non-Hermitian anisotropic chiral plasma,based on ab initio calculation by Maxwell’s *** perturbing in-plane permittivity,an unconventional Weyl point can transform into a quadratic Weyl exceptional ring,a type I Weyl exceptional chain with one chain point,a type II Weyl exceptional chain with two chain points,or other *** metamaterials with effective constitutive parameters are proposed to implement these unconventional Weyl exceptional *** work paves a way toward exploration of exotic physics of unconventional Weyl exceptional contours in non-Hermitian topological photonic continua.

关键词： exceptional topological constitutive

Glasesterterpenoids A-C:three sesterterpenoids with 7-cyclohexyl-decahydronaphthalene carbon skeleton isolated from the root of Lindera glauca

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Chinese Journal of Natural Medicines 2024年第9期22卷 864-868页

作者： HE Shiting ZOU qinghui ZHANG Qi LUO Yingming yan Die HE Jingxin LIU Yena CUI Hui School of Pharmaceutical Sciences Guangzhou University of Chinese MedicineGuangzhou 510006China State Key Laboratory of Oncology in South China Collaborative Innovation Center for Cancer MedicineSun Yat-Sen University Cancer CenterGuangzhou 510060China

Three novel sesterterpenoids glasesterterpenoids A-C(1-3),featuring an unprecedented 7-cyclohexyldecahydronaphthalene carbon skeleton,were isolated from the root of Lindera glauca(***).Their structures were elucidated by quantum chemical calculations and spectroscopic *** biogenetic pathway for 1-3 is *** the bioassay,glasesterterpenoid C exhibited DNA topoisomerase 1(Top1)inhibitory activity compared with the positive control,*** findings represent the first examples of sesterterpenoids with a 7-cyclohexyldecahydronaphthalene carbon skeleton from the root of ***.

关键词： Sesterterpenoids Lindera glauca

ABSTRACTS AND AUTHORS OF SELECTED ARTICLES——Gaining Enlightenment from High-speed Construction-An Investigation in Construction Speed Improvement of Natural Gas Purification Plant in Zhongxian

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天然气经济 2005年第3期 78-80页

作者： Xu Huafang Qiao Huaping Li Yongjun Wang yan yan qinghui

Demonstration of topological wireless power transfer

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Science Bulletin 2021年第10期66卷 974-980,M0003页

作者： Li Zhang Yihao yang Zhao Jiang Qiaolu Chen qinghui yan Zhouyi Wu Baile Zhang Jiangtao Huangu Hongsheng Chen Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationCollege of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Science and Technology Innovation Center Key Laboratory of Advanced Micro/Nano Electronic Devices&Smart Systems of ZhejiangZhejiang UniversityHangzhou 310027China International Joint Innovation Center ZJU-UIUC InstituteZhejiang UniversityHaining 314400China Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore Centre for Disruptive Photonic Technologies The Photonics InstituteNanyang Technological UniversitySingapore 639798Singapore Laboratory of Applied Research on Electromagnetics(ARE) Zhejiang UniversityHangzhou 310027China

Recent advances in non-radiative wireless power transfer(WPT)technique essentially relying on magnetic resonance and near-field coupling have successfully enabled a wide range of ***,WPT systems based on double resonators are severely limited to short-or mid-range distance,due to the deteriorating efficiency and power with long transfer *** systems based on multi-relay resonators can overcome this problem,which,however,suffer from sensitivity to perturbations and fabrication ***,we experimentally demonstrate a concept of topological wireless power transfer(TWPT),where energy is transferred efficiently via the near-field coupling between two topological edge states localized at the ends of a one-dimensional radiowave topological *** a TWPT system can be modelled as a parity-time-symmetric Su-Schrieffer-Heeger(SSH)chain with complex boundary ***,the coil configurations are judiciously designed,which significantly suppress the unwanted cross-couplings between nonadjacent coils that could break the chiral symmetry of the SSH *** tuning the inter-and intra-cell coupling strengths,we theoretically and experimentally demonstrate high energy transfer efficiency near the exceptional point of the topological edge states,even in the presence of *** combination of topological metamaterials,non-Hermitian physics,and WPT techniques could promise a variety of robust,efficient WPT applications over long distances in electronics,transportation,and industry.

关键词： Wireless power transfer Topological metamaterials Exceptional point Su-Schrieffer-Heeger model

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快速建成忠县天然气净化厂研究

天然气工业 2005年第8期25卷 115-118页

作者：徐华仿谯华平李勇军王燕鄢庆辉中国石油西南油气田分公司

中国石油天然气股份有限公司重点建设项目———忠县净化厂建设工程,既是国家“西气东输”战略的重要组成部分,也是西南油气田加快实现“52135”目标中的标志性工程。该建设项目从2004年3月正式开工到2005年4月竣工,历时仅13个多月,2005... 详细信息

中国石油天然气股份有限公司重点建设项目———忠县净化厂建设工程,既是国家“西气东输”战略的重要组成部分,也是西南油气田加快实现“52135”目标中的标志性工程。该建设项目从2004年3月正式开工到2005年4月竣工,历时仅13个多月,2005年6月20日,忠县净化厂已正式投产。这标志着长期制约西南油气田中低含硫气田的开发瓶颈得到有效消除,标志着加快实现“52135”目标中的第一个重点建设工程的圆满完成,标志着西南油气田一年建成一座大型净化厂目标的顺利实现。33个月建成一座大型天然气净化厂,这是以前川渝油气工业产能建设的速度;而忠县净化厂用时不到以前净化厂建设时间的一半,这在川渝油气产能建设史上前所未有,同时也创造了国内天然气净化厂建厂的最新纪录。为此,文章分析并总结了快速建成忠县天然气净化厂的经验和做法。

关键词：忠县天然气净化厂缩短建设周期经验做法中国石油天然气股份有限公司标志性工程重点建设项目 2004年3月

三丁酸甘油酯的消化吸收及其在猪生产中的应用

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饲料工业 2017年第17期38卷 20-23页

作者：原清会彭艳上海美农生物科技股份有限公司上海201807

动物健康是保障动物生产的前提,作为保障动物健康的主要添加剂抗生素由于负面作用逐渐被限制。三丁酸甘油酯(Tributyrin,TB)由于具有改善动物肠道健康的作用被视为一种较好的替抗物质。文章就三丁酸甘油酯的采食、消化和吸收过程做一阐... 详细信息

动物健康是保障动物生产的前提,作为保障动物健康的主要添加剂抗生素由于负面作用逐渐被限制。三丁酸甘油酯(Tributyrin,TB)由于具有改善动物肠道健康的作用被视为一种较好的替抗物质。文章就三丁酸甘油酯的采食、消化和吸收过程做一阐述,旨在为生产实践提供参考。

关键词：三丁酸甘油酯脂肪酶分解生产性能肠道

Experimental Realization of an Extreme-Parameter Omnidirectional Cloak

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Research 2019年第1期2019卷 678-685页

作者： Bin Zheng Yihao yang Zheping Shao qinghui yan Nian-Hai Shen Lian Shen Huaping Wang Erping Li Costas MSoukoulis Hongsheng Chen Key Lab.of Advanced Micro/Nano Electronic Devices&Smart Systems of Zhejiang College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Modern Optical Instrumentation and Te Electromagnetics Academy at Zhejiang University Zhejiang UniversityHangzhou 310027China Department of Physics and Astronomy and Ames Laboratory-U.S.DOE Iowa State University AmesIA 50011USA Institute of Marine Electronics Engineering Zhejiang UniversityHangzhou 310058China Institute of Electronic Structure and Laser FORTH71110 HeraklionCreteGreece

An ideal transformation-based omnidirectional cloak always relies on metamaterials with extreme parameters,which were previously thought to be too difcult to *** such a reason,in previous experimental proposals of invisibility cloaks,the extreme parameters requirements are usually abandoned,leading to inherent ***,we report on the frst experimental demonstration of an omnidirectional cloak that satisfes the extreme parameters requirement,which can hide objects in a homogenous *** of using resonant metamaterials that usually involve unavoidable absorptive loss,the extreme parameters are achieved using a nonresonant metamaterial comprising arrays of subwavelength metallic channels manufactured with 3D metal printing technology.A high level transmission of electromagnetic wave propagating through the present omnidirectional cloak,as well as signifcant reduction of scattering feld,is demonstrated both numerically and *** work may also inspire experimental realizations of the other full-parameter omnidirectional optical devices such as concentrator,rotators,and optical illusion apparatuses.

关键词： directional extreme realization

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情之功夫——王船山《诗广传》的诠释核心

衡阳师范学院学报 2021年第5期42卷 16-24页

作者：颜清辉同济大学人文学院上海200092

王船山的《诗广传》是对《诗经》的阐释。他在书中并不专于韩、鲁、齐、毛四家之诗法,也不遵守朱子理学一脉的阐释方式,而是以自身独特的哲学为根本,结合自己的历史际遇,并综合史学、诗学、政治等诸多科目而创作,整体性地清理文化学术得... 详细信息

王船山的《诗广传》是对《诗经》的阐释。他在书中并不专于韩、鲁、齐、毛四家之诗法,也不遵守朱子理学一脉的阐释方式,而是以自身独特的哲学为根本,结合自己的历史际遇,并综合史学、诗学、政治等诸多科目而创作,整体性地清理文化学术得失,反思历史气运兴衰。《诗广传》最终呈现为一个以“情”为核心的解释结构。在船山看来,“情”不可窒,但“情”又不可任,窒则难免落入寂灭之境,障碍生理,任则容易流于浮淫之气,销铄天地之和气。因此,船山认为必须有“情”的功夫:或者以先王之礼法引导、振奋天下之“情”,使之止于正;或者通过“敬”与“贞”之功来治理、安顿“情”,使之回归于“性”。这样,“情”便升华为“裕情”“达情”“白情”“道情”。于是,天下之情皆挚而不滞,气皆舒而不累,最终天下可安,人间可亲。

关键词：诗广传情功夫任情敬贞