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Measles,mumps,and rubella revaccination in children after completion of chemotherapy and hematopoietic stem cell transplantation:a single-center prospective efficacy and safety analysis

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World Journal of Pediatrics 2023年第11期19卷 1062-1070页

作者： Min Wang qing Yuan Peng-fei Deng Yi fei Hua Zhang Fen Zhou Wen-Juan Chen qing Cao jing Chen Yi-jin Gao Department of Hematology and Oncology Shanghai Children’s Medical CenterSchool of MedicineShanghai Jiao Tong UniversityNo.1678 Dongfang RoadPudong DistrictShanghai200127China Center for Diseases Control and Prevention Fudan University Pudong Institute of Preventive MedicineShanghai200136China Department of Infectious Diseases Shanghai Children’s Medical CenterShanghai Jiao Tong University School of MedicineShanghaiChina

Background Chemotherapy and hematopoietic stem cell transplantation(HSCT)can damage the immune system,and may result in a loss of protection from infectious *** study aimed to evaluate the impact of these treatments on the decrease in antibody titers of the measles,mumps,and rubella(MMR)vaccine and seroconversion post-revaccination of *** After completion of treatment for primary diseases,participants received an MMR *** titers for MMR before revaccination were analyzed for all 110 *** revaccination,68 participants received a follow-up evaluation of antibody titer and adverse *** Multivariable analysis showed that therapeutic schedules were the only factor correlated with lack of antibody titers for measles after completing treatment(P=0.008),while for mumps and rubella,no statistically significant difference was ***,our study clearly demonstrated positive seroconversion rates for measles(97.5%),mumps(81.0%),and rubella(93.2%),with antibody levels rising across the board and peaking at around 6 months following ***,6 months after revaccination,a downtrend of antibody titer levels was observed,which is comparatively earlier than the waning immunity observed in healthy ***,we found MMR revaccination to be safe,with only a single adverse reaction(local pain at the injection site)*** MMR revaccination is immunogenic for the *** suggest periodic monitoring of antibody titers,in addition to a booster vaccination,although the optimal timing of booster vaccination remains to be investigated further.

关键词： Adjuvant Chemotherapy Children Hematopoietic stem cell transplantation Immunogenicity Mumps-measles-rubella.Vaccine

High-resolution neutronics model for ^(238)Pu production in high-flux reactors

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Nuclear Science and Techniques 2024年第5期35卷 226-236页

作者： qing-Quan Pan qing-fei Zhao Lian-Jie Wang Bang-Yang Xia Yun Cai jin-Biao Xiong Xiao-jing Liu School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610200China

We proposed and compared three methods(filter burnup,single energy burnup,and burnup extremum analysis)to build a high-resolution neutronics model for 238Pu production in high-flux *** filter burnup and single energy burnup methods have no theoretical approximation and can achieve a spectrum resolution of up to~1 eV,thereby constructing the importance curve and yield curve of the full energy *** burnup extreme analysis method combines the importance and yield curves to consider the influence of irradiation time on production efficiency,thereby constructing extreme *** three curves,which quantify the transmutation rate of the nuclei in each energy region,are of physical significance because they have similar distributions.A high-resolution neutronics model for ^(238)Pu production was established based on these three curves,and its universality and feasibility were *** neutronics model can guide the neutron spectrum optimization and improve the yield of ^(238)Pu by up to 18.81%.The neutronics model revealed the law of nuclei transmutation in all energy regions with high spectrum resolution,thus providing theoretical support for high-flux reactor design and irradiation production of ^(238)Pu.

关键词： ^(238)Pu Neutronics model High-flux reactor Spectrum resolution Spectrum optimization

A kinetic study and factor analysis of solar thermochemical membrane reactors for syngas production

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Science China Technological Sciences 2025年第1期 207-221页

作者： Jiaxin XING Chao XU Xiangyu SUN Xin XIA fei jin Qiongqiong JIANG Jiale GAO Key Laboratory of Power Station Energy Transfer Conversion and System of MOE School of Energy Power and Mechanical EngineeringNorth China Electric Power University Department of Chemistry University College London School of Chemistry and Chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyState Ethnic Affairs CommissionNorth Minzu University

Solar thermochemical conversion technologies are promising for effectively utilizing solar energy by capturing the full spectrum of solar radiation. To overcome the challenges of low energy conversion efficiency and intermittency faced by solar thermochemical conversion, these technologies can be effectively integrated with membrane reactor technology. Although the performance of solar thermochemical membrane reactors has been experimentally tested, the chemical reactions and oxygen transport mechanisms during the energy conversion process remain poorly understood. This study introduces a resistance network model to elucidate the interactions between interfacial reactions and bulk diffusion during simultaneous oxidationreduction reactions on both sides of the membrane. We analyzed the oxygen flux of the membrane reactor under various operating conditions using this model to identify the reaction/transport-limiting side of the overall process. The most effective solar membrane reactor configuration utilizes natural gas and CO2, facilitating clean conversion of fossil fuels with significant advantages in fuel production and energy efficiency. Introducing CH4lowers the overall reaction temperature, maintains low oxygen partial pressure on the sweep side, and produces a synthesis gas with a 2:1 H2/CO molar ratio. Finally, a sensitivity analysis was used to explore the relationship between overall fuel production performance and operational parameters,highlighting the critical role of this research in enhancing the reaction and transport performance of membrane reactors and advancing the development of solar-driven thermochemical fuel production technologies.

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DIRECT ITERATIVE METHODS FOR RANK DEFICIENT GENERALIZED LEAST SQUARES PROBLEMS

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Journal of Computational Mathematics 2000年第4期18卷 439-448页

作者： jin-yun Yuan Xiao-qing jin Departamento de Matematica Universidade Federal do ParanaCuritibaBrazil Faculty of Science and Technology University of MacaoMacaoChina

The generalized least squares (LS) problem ... (Ax - b)[sup TW[sup -1](Ax - b) appears in, many application areas. Here W is an m × m symmetric positive definite matrix and A is an m × n matrix with m ≥ n. Since the problem has many solutions in rank deficient case, some special preconditioned techniques are adapted to obtain the minimum 2-norm solution. A block SOR method and the preconditioned conjugate gradient (PCG) method are proposed here. Convergence and optimal relaxation parameter for the block SOR method are studied. An error bound for the PCG method is given. The comparison of these methods is investigated. Some remarks on the implementation of the methods and the operation cost are given as well. [ABSTRACT FROM AUTHOR]

关键词： rank deficient generalized LS problem block SOR method PCG method convergence optimal parameter

Stochastic resonance in an under-damped bistable system driven by harmonic mixing signal

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Chinese Physics B 2018年第5期27卷 115-121页

作者： Yan-fei jin Department of Mechanics Beijing Institute of Technology Belting 100081 China

Stochastic resonance（SR） is studied in an under-damped bistable system driven by the harmonic mixing signal and Gaussian white noise. Using the linear response theory（LRT）, the expressions of the spectral amplification at fundamental and higher-order harmonic are obtained. The effects of damping coefficient, noise intensity, signal amplitude, and frequency on spectral amplifications are explored. Meanwhile, the power spectral density（PSD） and signal-to-noise ratio（SNR） are calculated to quantify SR and verify the theoretical results. The SNRs at the first and second harmonics exhibit a minimum first and a maximum later with increasing noise intensity. That is, both of the noise-induced suppression and resonance can be observed by choosing proper system parameters. Especially, when the ratio of the second harmonic amplitude to the fundamental one takes a large value, the SNR at the fundamental harmonic is a monotonic function of noise intensity and the SR phenomenon disappears.

关键词： stochastic resonance under-damped bistable system spectral amplification harmonic mixing signal

Separability for Positive Operators on Tensor Product of Hilbert Spaces

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Acta Mathematica Sinica,English Series 2021年第6期37卷 893-910页

作者： jin Chuan HOU jin fei CHAI College of Mathematics Taiyuan University of TechnologyTaiyuan 030024P.R.China

The separability and the entanglement(that is,inseparability)of the composite quantum states play important roles in quantum information ***,a quantum state is a trace-class positive operator with trace one acting on a complex separable Hilbert *** this paper,in more general frame,the notion of separability for quantum states is generalized to bounded positive operators acting on tensor product of Hilbert ***,not like the quantum state case,there are different kinds of separability for positive operators with different operator *** types of such separability are discussed;several criteria such as the finite rank entanglement witness criterion,the positive elementary operator criterion and PPT criterion to detect the separability of the positive operators are established;some methods to construct separable positive operators by operator matrices are *** may also make us to understand the separability and entanglement of quantum states better,and may be applied to find new separable quantum states.

关键词： Hilbert spaces tensor products positive operators separability entanglement

Polarization-Selective Collimation Effect with a Reflective Plasmonic Cavity

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Chinese Physics Letters 2012年第7期29卷 246-249页

作者： MAO fei-Long XIE jin-jin FAN qing-Yan ZHANG Li-Jian AN Zheng-Hua Institute of Advanced Materials State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures(Ministry of Education)Fudan UniversityShanghai 200433

We report that a metal-dielectric-metal cavity with a perforated top metallic filn shows a remarkable polarizationselective collimation effect through reflection on the perforated *** to simulations,such plasmonic cavities can achieve nearly perfect absorption (R<1.5%) of a transverse magnetic (TM) wave at an optimized incident angle while nearly perfect reflection (R~100%) at normal incidence.A very wide incident angle range (approximately 15°-65°) is found to exhibit a high absorption ratio exceeding over 70%.In contrast,for a transverse electric (TE) wave,the plasmonic cavities remain highly reflective (R~100%) regardless of the incident *** elucidate that this polarization- and angle-dependent behavior arises from an even-order (N =2) horizontal Fabry-Perot (FP) resonant mode inside the plasmonic *** effect may find potential applications for angle filtering of polarized divergent light beams in optics.

关键词： incident transverse perfect

Flower-like Au/Ag/TiO2 nanocomposites with enhanced photocatalytic efficiency under visible light irradiation

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Science China Chemistry 2017年第4期60卷 521-527页

作者： fei Han Xin Mao qing-Hua Xu Department of Chemistry National University of Singapore Singapore 117543 Singapore National University of Singapore Nanoscience & Nanotechnology Initiative (NUSNNl)-Nanocore Singapore 117576 Singapore National University of Singapore (Suzhou) Research Institute Suzhou 215123 China

Uniform flower-like TiO2 coated Au nanostars and core-shell Au@Ag nanostars with different amounts of Ag coating were prepared through a facile method by hydrolysis of TiF4 under an acidic environment. The photocatalytic capability of these flower-like nanocomposites under visible light irradiation was found to be enhanced by up to 4.7-fold compared to commercial P25 TiO2 nanoparticles. The enhanced photocatalytic activity was ascribed to improved light absorption and hot electron inj ection from the photo-excited Au@Ag core to the TiO2 shell.

关键词： metal nanoparticles TiO2 plasmon resonance nano-flower photocatalysis

Comparison of mechanical and tribological properties of CrBN coatings modified by Ni or Cu incorporation

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Friction 2022年第4期10卷 516-529页

作者： Qianzhi WANG Xuxin jin fei ZHOU National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

To compare the merits of Ni and Cu,the mechanical and tribological properties of CrBN coatings modified by Ni or Cu incorporation were *** results demonstrated that the CrBN–Cu coatings presented a lower friction coefficient than CrBN and CrBN–Ni coatings owing to the improved lubrication effect of the CuO layer originating from the tribochemical ***,the hardness decline due to Cu incorporation was much greater than that of Ni ***,the CrBN–Cu coatings exhibited a higher wear rate than the CrBN *** contrast,the plastic deformation enhancement induced by Ni incorporation exceeded the hardness ***,the wear of CrBN–Ni coatings partially turned to plastic deformation to present a lower wear rate than that of the CrBN coating.

关键词： CrBN coatings friction lubrication effect wear transmission component