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Efficient and selective extraction of uranium from seawater based on a novel pulsed liquid chromatography radionuclide separation method

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Nuclear Science and Techniques 2023年第2期34卷 13-27页

作者： Jian‑Hua ye Tao yu State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices East China University of TechnologyNanchang 330013China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China

The novel pulsed liquid chromatography radionuclide separation method presented here provides a new and promising strategy for the extraction of uranium from *** this study,a new chromatographic separation method was proposed,and a pulsed nuclide automated separation device was developed,alongside a new chromatographic *** length of this chromatographic column was 10 m,with an internal warp of 3 mm and a packing size of 1 mm,while the total separation units of the column reached 12,*** most favorable conditions for the separation of nuclides were then obtained through optimizing the separation conditions of the device:Sample pH in the column=2,sample injection flow rate=5.698 mL/min,chromatographic column heating temperature=60℃.Separation experiments were also carried out for uranium,europium,and sodium ions in mixed solutions;uranium and sodium ions in water samples from the Ganjiang River;and uranium,sodium,and magnesium ions from seawater *** separation factors between the different nuclei were then calculated based on the experimental data,and a formula for the separation level was *** experimental results showed that the separation factor in the mixed solution of uranium and europium(1:1)was 1.088,while achieving the initial separation of uranium and europium theoretically required a 47-stage *** the separation factor of 1.50for the uranium and sodium ions in water samples from the Ganjiang River,achieving the initial separation of uranium and sodium ions would have theoretically required at least a 21-stage ***,for the seawater sample separation experiments,the separation factor of uranium and sodium ions was 1.2885;therefore,more than 28 stages of sample separation would be required to achieve uranium extraction from *** novel pulsed liquid chromatography method proposed in this study was innovative in terms of uranium separation and enrichment,while expanding the possibilities

关键词： Pulsed liquid chromatography Nuclide separation Seawater uranium extraction Uranium enrichment

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Synthesis and thermal stability of a novel phosphorus-nitrogen containing intumescent flame retardant

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Chinese Chemical Letters 2008年第3期19卷 277-278页

作者： Zhi yu Ju Yong ye Ru Yi Zou Xin Cheng Liao yu Fen zhao Key Laboratory for Chemical Biology and Organic Chemistry of Henan Province Department of Chemistry Zhengzhou University Zhengzhou 450052 China Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology （Ministry of Education） Department of Chemistry Tsinghua University Beijing 100084 China

A novel phosphorus-nitrogen containing intumescent flame retardant （P-N IFR） was prepared via the reaction of dichlor-opentate with N-methylaniline. The structure of the product was confirmed by ^1H NMR, ^31p NMR, M... 详细信息

关键词： Synthesis Thermal stability Intumescent flame retardant

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Multi-stage Robust Scheduling for Community Microgrid with Energy Storage

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Journal of Modern Power Systems and Clean Energy 2023年第6期11卷 1923-1934页

作者： ye Tang Qiaozhu Zhai Jiexing zhao IEEE Systems Engineering Institute MOEKLINNS LabXi’an Jiaotong UniversityXi’an 710049China

Energy storage devices can effectively balance the uncertain load and significantly reduce electricity costs in the community microgrids(C-MGs) integrated with renewable energy sources. Scheduling of energy storage is a multi-stage decision problem in which the decisions must be guaranteed to be nonanticipative and multi-stage robust(all-scenario-feasible). To satisfy these two requirements, this paper proposes a method based on a necessary and sufficient feasibility condition of scheduling decisions under the polyhedral uncertainty set. Unlike the most popular affine decision rule(ADR) based multistage robust optimization(MSRO) method, the method proposed in this paper does not require the affine decision assumption, and the feasible regions(the set of all feasible solutions) are not reduced, nor is the solution quality affected. A simple illustrative example and real-scale scheduling cases demonstrate that the proposed method can find feasible solutions when the ADR-based MSRO fails, and that it finds better solutions when both methods succeed. Comprehensive case studies for a real system are performed and the results validate the effectiveness and efficiency of the proposed method.

关键词： Community microgrid short-term scheduling energy storage nonanticipativity polyhedral uncertainty set

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Influence of differential longitudinal cyclic pitch on flight dynamics of coaxial compound helicopter

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Chinese Journal of Aeronautics 2023年第9期36卷 207-220页

作者： Yanqin zhao ye yuAN Renliang CHEN National Key Laboratory of Helicopter Aeromechanics Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Aerospace Engineering Swansea UniversitySwansea city SA18ENUK

The Differential Longitudinal Cyclic Pitch(DLCP)in coaxial compound helicopter is found to be useful in mitigating low-speed rotor interactions and improving flight *** complex mutual interaction is simulated by a revised rotor aerodynamics model,where an improved Blade Element Momentum Theory(BEMT)is *** with the rotor inflow distributions and aircraft trim results from literature validate the accuracy of the ***,the influence of the DLCP on the flight dynamics of the aircraft is *** trim characteristics indicate that a negative DLCP can reduce collective and differential collective inputs in low speed forward flight,and the negative longitudinal gradient is ***,a moderate DLCP can reduce the rotor and total power consumption by 4.68%and 2.9%,*** DLCP further increases,the increased propeller power and unbalanced thrust allocation offset the *** high-speed flight,DLCP does not improve the performance except for extra lateral and heading stick *** addition,the tip clearance is degraded throughout the speed envelope due to the differential pitching moment and the higher thrust from the lower ***,the changed rotor efficiency and induced velocity alter low-speed dynamic stability and *** pitch and roll subsidences are slightly degraded with the DLCP,while the heave subsidence,dutch roll and phugoid modes are ***,the on-axis controllability,including collective,differential collective pitch,longitudinal and lateral cyclic pitches,varies with DLCP due to its effect on rotor efficiency and inflow *** conclusion,a reasonable DLCP is recommended to adjust the rotor interaction and improve aircraft performance,and further to alter the flight dynamics and aerodynamics of aircraft.

关键词： Blade element momentum theory Coaxial compound helicopter Differential longitudinal cyclic pitch Interaction model Tip clearance

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P-Indeterminate Vector Similarity Measures of Orthopair Neutrosophic Number Sets and Their Decision-MakingMethod with Indeterminate Degrees

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Computer Modeling in Engineering & Sciences 2021年第9期128卷 1219-1230页

作者： Mailing zhao Jun ye Department of Electrical Engineering and Automation Shaoxing UniversityShaoxing312000China School of Civil and Environmental Engineering Ningbo UniversityNingbo315211China

In the complexity and indeterminacy of decision making(DM)environments,orthopair neutrosophic number set(ONNS)presented by ye et *** be described by the truth and falsity indeterminacy ***,ONNS demonstrates its advantages in the indeterminate information expression,aggregations,and DM problems with some indeterminate ***,the existing research lacks some similarity measures between *** are indispensable mathematical tools and play a crucial role in DM,pattern recognition,and clustering ***,it is necessary to propose some similaritymeasures betweenONNSs to supplement the *** solve the issue,this study firstly proposes the p-indeterminate cosine measure,p-indeterminate Dice measure,p-indeterminate Jaccard measure of ONNSs(i.e.,the three parameterized indeterminate vector similarity measures of ONNSs)in vector ***,a DMmethod based on the parameterized indeterminate vector similarity measures of ONNSs is developed to solve indeterminate multiple attribute DM problems by choosing different indeterminate degrees of the parameter p,such as the small indeterminate degree(p=0)or the moderate indeterminate degree(p=0.5)or the big indeterminate degree(p=1).Lastly,an actual DM example on choosing a suitable logistics supplier is provided to demonstrate the flexibility and practicability of the developed DM approach in indeterminate DM *** comparison with existing relative DM methods,the superiority of this study is that the established DMapproach indicates its flexibility and suitability depending on decision makers’indeterminate degrees(decision risks)in ONNS setting.

关键词： Orthopair neutrosophic number set p-indeterminate vector similarity measure p-indeterminate cosine measure p-indeterminate Dice measure p-indeterminate Jaccard measure decision making

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Interaction of moiréexcitons with cavity photons in two-dimensional semiconductor hetero-bilayers

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Journal of Semiconductors 2023年第1期44卷 68-73页

作者： yuchen Gao yu ye State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China

Moirématerials,composed of two single-layer two-dimensional semiconductors,are important because they are good platforms for studying strongly correlated *** them,moirématerials based on transition metal dichalcogenides(TMDs)have been intensively *** hetero-bilayer can support moiréinterlayer excitons if there is a small twist angle or small lattice constant difference between the TMDs in the hetero-bilayer and form a type-Ⅱ band *** coupling of moiréinterlayer excitons to cavity modes can induce exotic ***,we review recent advances in the coupling of moiréinterlayer excitons to cavities,and comment on the current difficulties and possible future research directions in this field.

关键词： moiréinterlayer excitons optical cavity exciton-polariton Bose-Einstein condensation

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Global precipitation change during the Holocene:a combination of records and simulations

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Frontiers of Earth Science 2024年第1期18卷 112-126页

作者： Wangting ye yu LI Key Laboratory of Western China᾽s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesCenter for Hydrologic Cycle and Water Resources in Arid RegionLanzhou UniversityLanzhou 730000China

Precipitation can shape our climate both in the present and the *** though we have made significant advances in studying the mechanisms of millennial-scale climate changes through high-resolution records,we still cannot quantitatively characterize the global spatiotemporal precipitation variations within the ***,we developed a new approach to integrating data from 349 globally distributed records and climate models to reconstruct regional and global precipitation patterns over the last 12000 *** results reveal that precipitation reconstructions can be divided into monsoon-driven and westerly driven *** results suggest that an arid climate was experienced in the late glacial and early Holocene epoch(~12−7.4 cal ka BP),attaining a middle Holocene optimum(~7.4−3.5 cal ka BP),and drier after the middle *** to our reconstructions,the global precipitation reconstruction increased from the early Holocene until 3.8 cal ka BP and then subsequently *** addition,our reconstructions better reproduce the low-frequency events and extreme precipitation at the millennial scale in the hemispheres,but the performance of the reconstructions in the equatorial Pacific and the Southern Hemisphere of Africa and the Americas is *** resolution of the record and the simulation capability of the climate model remain important means to improve our understanding of past climate change.

关键词： Holocene equatorial glacial

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Nonlinear impacts of temperature on antibiotic resistance in Escherichia coli

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Environmental Science and Ecotechnology 2024年第6期22卷 339-343页

作者： Wenya zhao Shikan Zheng Chengsong ye Jianguo Li Xin yu College of the Environment and Ecology Xiamen UniversityXiamen361102China Fujian Key Laboratory of Coastal Pollution Prevention and Control Xiamen361102China

The increase in bacterial antibiotic resistance poses a significant threat to the effectiveness of antibiotics,and there is growing evidence suggesting that global warming may speed up this ***,the direct influence of temperature on the development of antibiotic resistance and the underlying mechanisms is not yet fully *** we show that antibiotic resistance exhibits a nonlinear response to elevated temperatures under the combined stress of temperatures and *** find that the effectiveness of gatifloxacin against Escherichia coli significantly diminishes at 42°C,while resistance increases 256-fold at 27°***,the increased transcription levels of genes such as marA,ygfA,and ibpB with rising temperatures,along with gene mutations at different sites,explain the observed variability in resistance *** findings highlight the complexity of antibiotic resistance evolution and the urgent need for comprehensive studies to understand and mitigate the effects of global warming on antibiotic resistance.

关键词： Antibiotic resistance Temperature Gatifloxacin Resistance evolution Fitness costs

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A new liquid membrane diffusion model for characterizing the adsorption kinetics of europium by using a continuous measurement of adsorption platform

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Nuclear Science and Techniques 2024年第1期35卷 59-72页

作者： Hao-Qi yu Tao yu Jian-Hua ye State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China CGN Cangnan Nuclear Power Co. Ltd.Cangnan 325800China Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices East China University of TechnologyNanchang 330013China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China

To explore the kinetic adsorption under continuous and nonequilibrium states, an integration of continuous measurement and adsorption platform kinetics method was proposed, which was initially called the ICM-AP kinetics method, and a corresponding kinetic adsorption experimental method was developed. Adsorption experiments of europium(Eu) on Ca-bentonite,Na-bentonite, and the D231 cation exchange resin were performed using the ICM-AP kinetics method and continuous measurements. Because the kinetic experimental results observed in this study were different from those of traditional batch adsorption data, pseudo-first-order or pseudo-second-order kinetic models were unsuitable for fitting the experimental ***, a liquid membrane diffusion(LMD) model was developed based on the assumption of simultaneous adsorption/desorption to discuss the mechanism of kinetic adsorption. The kinetic adsorption mechanism was also studied by using *** results indicated that the proposed adsorption model can fit the experimental data more suitably, and the adsorption/desorption behaviors of Eu on bentonite and the D231 resin were simultaneously observed, suggesting that the adsorption kinetics of Eu(Ⅲ) was mainly dominated by hydrated Eu(Ⅲ) ions on the liquid membrane.

关键词： ICM-AP method LMD model Adsorption mechanism Eu(Ⅲ)

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Performance analysis of sign quantized projection

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The Journal of China Universities of Posts and Telecommunications 2010年第1期17卷 62-66页

作者： ye Tian-yu NIU Xin-xin MA zhao-feng YANG Yi-xian Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Key Laboratory of Network and Information Attack and Defense Technology of MOE Beijing University of Posts and Telecommunications Beijing 100876 China National Engineering Laboratory for Disaster Backup and Recovery Beijing 100876 China

Quantized projection technology （QP） is the version of quantization index modulation （QIM） working in the projection domain. It essentially belongs to a double-sided additive embedder. In this article, the concept of sign quantized projection （SQP） is proposed, which differs from the conventional QP when working as a single-sided embedder. Theoretical analysis reveals that SQP has the same probability of miss and probability of false alarm as QP. Also, the document-to-watermark ratio （DWR） of SQP is less than its counterpart of QP by lOlg（1＋ γ） dB.

关键词： DWR QP SQP

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