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Cobalt-nitrogen co-doped porous carbon sphere as highly.efficient cataly.t for liquid-phase cy.lohexane oxidation with molecular oxy.en and the active sites investigation

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Frontiers of Chemical Science and Engineering 2024年第3期18卷 101-112页

作者： Lei chen y.an Sun Jinshan Chi Wei Xiong Pingle Liu Fang hao College of Chemical Engineering National&Local United Engineering Research Centre for Chemical Process Simulation and IntensificationXiangtan UniversityXiangtan411105China

The selective oxidation of cy.lohexane to cy.lohexanone and cy.lohexanol(KA oil)is a challenging issue in the chemical *** present the industrial conversion of cy.lohexane to cy.lohexanone and cy.lohexanol is normally.controlled at less than 5%***,the development of highly.active and stable cataly.ts for the aerobic oxidation of cy.lohexane is necessary.to overcome this low-efficiency.***,we have developed a cobalt-nitrogen co-doped porous sphere cataly.t,Co-NC-x(x is the Zn/Co molar ratio,where x=0,0.5,1,2,and 4)by.py.oly.ing resorcinol-formaldehy.e resin *** achieved 88.28%cy.lohexanone and cy.lohexanol selectivity.and a cy.lohexane conversion of 8.88%under *** results showed that the introduction of zinc effectively.alleviated the aggregation of Co nanoparticles and optimized the structural properties of the *** addition,Co0 and py.idinic-N are proposed to be the possible active species,and their proportion efficiently.increased in the presence of Zn^(2+)*** this study.we developed a novel strategy.to design highly.active cataly.ts for cy.lohexane oxidation.

关键词： KA oil production cy.lohexane selective oxidation cobalt-nitrogen co-doped porous carbon spheres metal-organic framework

Green manufacturing for achieving carbon neutrality.goal requires innovative technologies:A bibliometric analy.is from 1991 to 2022

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Journal of Environmental Sciences 2024年第6期140卷 255-269页

作者： Sheng Zhang Xintian Wang Jiay. Xu Qinqin chen Meng Peng Jiming hao School of Environment Tsinghua UniversityBeijing 100084China School of Environment&Natural Resources Renmin University of ChinaBeijing 100872China State Environmental Protection Key.Laboratory.of Sources and Control of Air Pollution Complex Beijing 100084China

Recent y.ars have seen a significant increase in interest in green manufacturing as a key.driver of global carbon-neutral efforts and sustainable *** find the research hotspots of green manufacturing and reveal future research trends,this study.reviewed and analy.ed research articles from the Web of Science database on green manufacturing from1991 to 2022 using a bibliometric *** findings indicate a significant rise in the number of articles related to green manufacturing since the ***,there has been an increase in the involvement of scholars from developing countries such as China and India in this *** on the literature review and bibliometric cluster analy.is on green manufacturing,we believed that future research may.continue following the lines of intelligent technology.integration,adoption of frontier engineering techniques,and industry.development in line with carbon reduction targets.A framework for future green manufacturing development is proposed,with a focus on Chinese *** framework could provide policy.implications for developing countries looking to pursue opportunities for development in green manufacturing.

关键词： Green manufacturing Carbon neutrality Sustainable development Innovative technologies China

Enhancing metformin-induced tumor metabolism destruction by.glucose oxidase for triple-combination therapy

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Journal of Pharmaceutical Analy.is 2024年第3期14卷 321-334页

作者： Rangrang Fan Linrui Cai hao Liu Hongxu chen Caili chen Gang Guo Jianguo Xu Department of Neurosurgery.and Institute of Neurosurgery Cancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengdu610041China NMPA Key.Laboratory.for Technical Research on Drug Products in Vitro and in Vivo Correlation Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOENational Drug Clinical-Trial InstitutionWest China Second HospitalSichuan UniversityChengdu610041China Department of Immunology School of Basic Medical SciencesXinxiang Medical UniversityXinxiangHenan453000China

Despite decades of laboratory.and clinical trials,breast cancer remains the main cause of cancer-related disease burden in *** the metabolism destruction effect of metformin(Met)and cancer cell starvation induced by.glucose oxidase(GOx),after their efficient delivery.to tumor sites,GOx and Met may.consume a large amount of glucose and produce sufficient hy.rogen peroxide in ***,a pH-responsive epigallocatechin gallate(EGCG)-conjugated low-molecular-weight chitosan(LC-EGCG,LE)nanoparticle(Met–GOx/Fe@LE NPs)was *** coordination between iron ions(Fe3+)and EGCG in this nanoplatform can enhance the efficacy.of chemody.amic therapy.via the Fenton ***–GOx/Fe@LE NPs allow GOx to retain its enzy.atic activity.while simultaneously.improving its ***,this pH-responsive nanoplatform presents controllable drug release *** in vivo biodistribution study.showed that the intracranial accumulation of GOx delivered by.this nanoplatform was 3.6-fold higher than that of the free *** in vivo anticancer results indicated that this metabolism destruction/starvation/chemody.amic triple-combination therapy.could induce increased apoptosis/death of tumor cells and reduce their *** triple-combination therapy.approach is promising for efficient and targeted cancer treatment.

关键词： Metformin Glucose oxidase Metabolism disruption Tumor starvation Combination cancer therapy

Axial enantiomers with donor-regulated TADF feature for multicolor circularly.polarized electroluminescence

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Science China Chemistry 2024年第6期67卷 2039-2045页

作者： chen-hao Guo Wen-Long Zhao Ke-Ke Tan Wei-chen Guo Liheng Feng Chuan-Feng chen Meng Li School of Chemistry.and Chemical Engineering Shanxi UniversityTaiyuan030006China Beijing National Laboratory.for Molecular Sciences CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of SciencesBeijing100190China University.of Chinese Academy.of Sciences Beijing100049China

This study.optimized the TADF feature of axial chiral enantiomers through precise donor engineering,and multicolor CP-TADFwas achieved in the axial chiral *** pairs of axial enantiomers with donor-regulated TADF feature,namely.R/S)-TPCBD,(R/S)-DPCBD,and(R/S)-DPACBD,were sy.thesized by.introducing carbazole donors with different substituents onto bipheny. cy.nide *** the electron-donating ability.of donors increases,the emission of these axial enantiomers ranges from 455,476 to 552 nm,their singlet-triplet energy.gaps(ΔE_(ST))gradually.decrease from 0.30,0.22 to 0.02 e V,accompanied by.an increasement in the transition rate(k_(RISC))of RISC process,and the k_(RISC)of DPACBD could reach up to 7.16×10^(5)s^(-1).These axial enantiomers also exhibit mirror-image CD and circularly.polarized luminescence(CPL)***,OLEDs based on TPCBD,DPCBD,and DPACBD as emitter were then fabricated,which display.d blue,green,and orange electroluminescence with EQE_(max)of 13.0%,16.4%,and 25.0%,*** results also exhibited a phenomenon of device efficiency.increasing with the enhancement of donor ***,the CP-OLEDs using(R/S)-TPCBD,(R/S)-DPCBD and(R/S)-DPACBD as emitters display.d intense CPEL signals with g_(EL)values of 3.4×10^(-3)/-4.1×10^(-3),3.2×10^(-3)/-3.1×10^(-3)and2.3×10^(-3)/-2.1×10^(-3),*** convenient molecular engineering of donor regulation in the same molecular skeleton,CP-TADF materials with multicolor CPEL and improved device performance could be conveniently.achieved.

关键词： axial chirality thermally.activated delay.d fluorescence circularly.polarized luminescence electroluminescence organic light-emitting diodes

A robust genomic-based prognostic model for the assessment ofcancer stemness and survival for patients with hepatocellularcarcinoma

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Hepatobiliary.& Pancreatic Diseases International 2024年第1期23卷 97-102页

作者： cheng-Li Du Shen-y. Wei y.n-hao chen Kang-Jie chen Division of Thoracic Surgery First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Zhejiang University.School of Medicine Hangzhou 310003China Division of Hepatobiliary.Pancreatic Surgery First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

To the Editor:Hepatocellular carcinoma(HCC)is an aggressive malignancy.with poor long-term prognosis[1].Liver cancer stem cell(CSC)can drive the metastasis,drug resistance,and recurrence of HCC[2].The regulatory.mechanisms about liver cancer stemness have been investigated,which encouraged the identification and characterization of novel prognostic and therapeutic strategies for HCC[3].

关键词： cancer prognosis Liver

Efficient cutting path planning for a non-spherical tool based on an iso-scallop height distance field

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Chinese Journal of Aeronautics 2024年第7期37卷 496-510页

作者： Jiancheng hao Dong HE Zhaoy. LI Pengcheng HU y.anzhi chen Kai TANG Department of Mechanical and Aerospace Engineering Hong Kong University of Science and TechnologyHong Kong 999077China The Hong Kong University.of Science and Technology.Guangzhou) Smart Manufacturing ThrustNanshaGuangzhou 511400China HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute Shenzhen 518057China HKUST Shenzhen Research Institute Shenzhen 518057China

Iso-scallop height machining means,when machining a freeform surface,the scallop height between any.two neighboring tool paths on the surface will be a constant(i.e.,the given threshold),which is preferable among various freeform surface machining strategies due to its high machining efficiency.as well as better machine tool’s ***,all the existing iso-scallop height path planning methods pertain to only.the ball-end or flat-end ty.es of *** recent y.ars,the non-spherical cutting tool has become more and more popular,especially.for five-axis machining of complex freeform surfaces,majorly.owing to its non-constant curvature which can be utilized to adaptively.fit the tool to the surface to both avoid the local gouging and enlarge the cutting ***,there have been no reported works on iso-scallop height five-axis tool path generation for a non-spherical tool,and,in this paper,we present ***,we first define and construct two fields on the surface to be machined-the collision-free tool orientation field(vector)and the iso-scallop height distance field(scalar).The iso-lines of the scalar field and their associated tool orientation field vectors then naturally.serve as potential iso-scallop height five-axis tool paths,and we present a propagation-based algorithm to construct the desired tool path from the *** computer simulation and phy.ical cutting experiments confirm that every.here on the surface,except may.e near the saddle curves of the scalar filed,the scallop height is exactly.the given *** adding the saddle curves as extra tool paths,the final machined surface then is assured of the required scallop height requirement.

关键词： Freeform surface machining Iso-scallop tool path Customized tool Five-axis tool path Computer aided manufacturing

Self-actuating protection mechanisms for safer lithium-ion batteries

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Journal of Energy.Chemistry 2024年第7期94卷 181-198页

作者： y.ng Luo Chunchun Sang Kehan Le hao chen Hui Li Xinping Ai Hubei Key.Lab of Electrochemical Power Sources College of Chemistry&Molecular ScienceWuhan UniversityWuhan 430072HubeiChina state Key.Laboratory.of New Textile Materials&Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200HubeiChina

Safety.issue is still a problem nowaday. for the large-scale application of lithium-ion batteries(LIBs)in electric vehicles and energy.storage *** unsafe behaviors of LIBs arise from the thermal run-away.which is intrinsically.triggered by.the overcharging and *** improve the safety.of LIBs,various protection strategies based on self-actuating reaction control mechanisms(SRCMs)have been proposed,including redox shuttle,poly.erizable monomer additive,potential-sensitive separator,thermal shutdown separator,positive-temperature-coefficient electrode,thermally.poly.erizable addi-tive,and reversible thermal phase transition *** build-in protection mechanisms,these meth-ods can sensitively.detect either the temperature change inside battery.or the potential change of the electrode,and spontaneously.shut down the electrode reaction at risky.conditions,thus preventing the battery.from going into thermal *** their advantages in enhancing the intrinsic safety.of LIBs,this paper overviews the research progresses of SRCMs after a brief introduction of thermal runaway.mechanism and limitations of conventional thermal runaway.mitigating *** importantly.the current states and issues,key.challenges,and future developing trends of SRCTs are also discussed and outlined from the viewpoint of practical application,aiming at providing insights and guidance for developing more effective SRCMs for LIBs.

关键词： Li-ion battery Safety Thermal runaway Thermal protection Overcharge protection

TULAM:trajectory.user linking via attention mechanism

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Science China(Information Sciences) 2024年第1期67卷 51-68页

作者： hao LI Shuy. CAO y.qing chen Min ZHANG Dengguo FENG Trusted Computing and Information Assurance Laboratory Institute of SoftwareChinese Academy of Sciences University.of Chinese Academy.of Sciences

Recently.the application of location-based services(LBS) has become a prevalent means to provide convenience in customers’ every.ay.***,because massive volumes of location information are collected by.LBS applications,users may.suffer from serious privacy.*** studies have shown that the identities of users can be inferred from historical anony.ous trajectories,which is formulated as the trajectory.user linking(TUL) *** some recurrent neural network(RNN)-based models have been proposed to capture implicit movement patterns among trajectories to improve TUL performance,they.cannot learn the sequential and contextual semantics within any.individual trajectory.completely.leaving the advantages of RNNs *** therefore propose an RNN model with an attention mechanism called TULAM to improve the accuracy.of the TUL *** learns sequential relationships within individual trajectories via RNN and captures contextual semantics from trajectories via a multi-head attention ***,we propose a novel location encoding method called approximate one-hot to solve the corpus shortage problem of trajectory.*** were conducted on real datasets from the Gowalla and Foursquare LBS *** experimental results indicate that TULAM is a practical solution that achieves significant improvements over existing methods with satisfactory.model complexity.and convergence.

关键词： information security data security.and privacy trajectory.user linking deep learning recurrent neural network attention mechanism

Large-disturbance Stability.Analy.is of Power Sy.tems with Sy.chronous Generator and Converter-interfaced Generation

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Journal of Modern Power Sy.tems and Clean Energy 2024年第3期12卷 997-1002页

作者： Lei chen y.ng Min Liangshuai hao Guangzheng Xing y.lou Li Shiy.n Xu Department of Electrical Engineering Tsinghua UniversityBeijing 100084China China Electric Power Research Institute Beijing 100192China

This letter studies large-disturbance stability.of the power sy.tem with a sy.chronous generator(SG)and a converter-interfaced generation(CIG)connected to infinite *** power sy.tem is multi-timescale and first *** is shown that the boundary.of region of attraction(ROA)of the simplified model is composed of stable manifolds of unstable equilibrium point(UEP)or semi-singular point(SSP),named anchor points,and singular surface *** ty.e of anchor point determines the dominant instability.pattern of the power *** the anchor point is UEP or SSP,the dominant instability.pattern is the instability.of rotor angle of SG or the instability.of phase-locked loop and outer control loop(OCL)of CIG,*** of dominant instability.pattern can be analy.ed with the relative position relationship between UEP and *** effect of OCL is *** the OCL is activated,the ROA becomes smaller and the sy.tem is more prone to instability.of *** is necessary.to consider the OCL when study.ng the large-disturbance stability.of the power sy.tem.

关键词： Converter-interfaced generation large-disturbance stability outer control loop phase-locked loop sy.chronous generator voltage source converter