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Using data-limited approaches to assess data-rich Indian Ocean bigeye tuna:Data quantity evaluation and critical information for management implications

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Acta Oceanologica Sinica 2022年第3期41卷 11-23页

作者： ya'nan Li Jiangfeng Zhu Xiaojie Dai Dan Fu Yong Chen College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China School of Marine Sciences University of MaineOronoME 04469USA Key Laboratory of Oceanic Fisheries Exploration Ministry of Agriculture and Rural AffairsShanghai 201306China Indian Ocean Tuna Commission Victoria 361Seychelles

The majority of fishery stocks in the world are data limited,which limits formal stock *** the impacts of input data on stock assessment is critical for improving stock assessment and developing precautionary management *** compare catch advice obtained from applications of various datalimited methods(DLMs)with forecasted catch advice from existing data-rich stock assessment models for the Indian Ocean bigeye tuna(Thunnus obesus).Our goal was to evaluate the consistency of catch advice derived from data-rich methods and data-limited approaches when only a subset of data is *** Stock Synthesis(SS)results were treated as benchmarks for comparison because they reflect the most comprehensive and best possible scientific information of the *** study indicated that although the DLMs examined appeared robust for the Indian Ocean bigeye tuna,the implied catch advice differed between data-limited approaches and the current assessment,due to different data inputs and model *** DLMs tended to provide more optimistic catch advice compared with the SS,which was mostly influenced by historical catches,current abundance and depletion estimates,and natural mortality,but was less sensitive to life-history parameters(particularly those related to growth).This study highlights the utility of DLMs and their implications on catch advice for the management of tuna stocks.

关键词： stock assessment bigeye tuna data-limited fisheries management Indian Ocean

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Ni(OH)_(2) Derived from NiS_(2) Induced by Reflux Playing Three Roles for Hydrogen/Oxygen Evolution Reaction

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Chinese Journal of Structural Chemistry 2022年第8期41卷 52-57页

作者： Sheng-Jun Xu ya-nan Zhou Guo-Ping Shen Bin Dong Dongying Haike Ruilin Chemical Co. LTD.Dongying 257000China State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China

Developing efficient and promising non-noble catalysts for oxygen evolution reaction(OER) and hydrogen evolution reaction(HER) is vital but still a huge challenge for the clean energy system. Herein, we have integrated the active components for OER(Ni(OH)_(2)) and HER(Ni S_(2) and Ni(OH)_(2)) into Ni(OH)_(2)@NiS_(2) heterostructures by a facile reflux method. The in-situ formed Ni(OH)_(2) thin layer is coated on the surface of hollow Ni S2 nanosphere. The uniform Ni(OH)_(2)@NiS_(2) hollow sphere processes enlarge the electrochemically active specific surface area and enhance the intrinsic activity compared to NiS_(2) precursor, which affords a current density of 10 m A cm^(-2) at the overpotential of 309 m V and 100 m Acm^(-2) at 359 m V for OER. Meanwhile, Ni(OH)_(2)@NiS_(2) can reach 10 m A cm^(-2) at 233 m V for HER, superior to pure NiS_(2). The enhanced performance can be attributed to the synergy between Ni(OH)_(2) and NiS_(2). Specifically, Ni(OH)_(2) has three functions for water splitting: providing active sites for hydrogen adsorption and hydroxyl group desorption and working as real OER active sites. Moreover, Ni(OH)_(2)@NiS_(2) displays great stability for OER(50 h) and HER(30 h).

关键词： Ni(OH)_(2) NiS_(2) heterostructures oxygen evolution reaction hydrogen evolution reaction

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Simultaneous Estimation of Multiple Conditional Regression Quantiles

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Acta Mathematicae Applicatae Sinica 2020年第2期36卷 448-457页

作者： yan-ke WU ya-nan HU Jian ZHOU Mao-zai TIAN Faculty of Mathematics and Computer Science Guangdong Ocean UniversityZhanjiang 524088China Center for Applied Statistics School of StatisticsRenmin University of ChinaBeijing 100872China School of Statistics Lanzhou University of Finance and EconomicsLanzhou 730101China School of Statistics and Information Xinjiang University of Finance and EconomicsUrumqi 830012China Business School Zhengzhou UniversityZhenzhou 450001China China Academy of Transportation Sciences Beijing 100029China

In this article, we put forward a new approach to estimate multiple conditional regression quantiles simultaneously. Unlike the double summation method in most of the literatures, our proposed model allows continuous variety for the quantile level over(0,1). As a result, all the quantile curves can be obtained via a 2-dimensional surface simultaneously. Most importantly, the proposed minimizing criterion can be readily transformed to a linear programming problem. We use tensor product bi-linear quantile smoothing B-splines tofit it. The asymptotic property of the estimator is derived and a real data set is analyzed to demonstrate the proposed method.

关键词： Simultaneous Estimation Conditional Regression Quantiles B-spline Tensor Product

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Synthesis and Pyrolysis of Soluble Cyclic Hf-Schiff Base Polymers

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Chinese Journal of Polymer Science 2021年第6期39卷 659-664,I0005页

作者： Yu-Huan Wu Li Ye ya-nan Sun Wei-Jian Han Tong Zhao Key Laboratory of Science and Technology on High-tech Polymer Materials Institute of ChemistryChinese Academy of SciencesBeijing 100190China University ofChinese Academy of Sciences Beijing 100049China

Soluble Hf-containing polymers are significant processable precursors for the fabrication of ultra-high temperature *** this work,cyclic Hf-Schiff base polymers were synthesized via direct polymerization of hafnium alkoxide and bis-salen *** defined structure and molecular weight of the polymers were characterized by NMR spectroscopy,gel permeation chromatography and MALDI-TOF mass *** feed ratio of monomers regulated the molecular weight and solubility of the *** synthetic strategy features simple operation under ambient conditions,efficient reaction with high yield and cyclic polymers as the main *** Hf-Schiff base polymers were converted to HfC/C materials after pyrolysis under argon at 1600°C,which was identified by XRD measurements,elemental analyses and Raman *** work will inspire more precise and efficient synthesis and applications of metallopolymers.

关键词： Hf-containing polymer Schiff base Cyclic polymer Preceramic polymer Hafnium carbide

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From ancient wisdom to modern science:Gut microbiota sheds light on property theory of traditional Chinese medicine

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Journal of Integrative Medicine 2024年第4期22卷 413-444页

作者： ya-nan yang Jia-guo Zhan Ying Cao Chong-ming Wu School of Chinese Materia Medica Tianjin University of Traditional Chinese MedicineTianjin 301617China Tianjin Key Laboratory of Therapeutic Substance of Traditional Chinese Medicine Tianjin 301617China

The property theory of traditional Chinese medicine(TCM) has been practiced for thousands of years,playing a pivotal role in the clinical application of TCM. While advancements in energy metabolism,chemical composition analysis, machine learning, ion current modeling, and supercritical fluid technology have provided valuable insight into how aspects of TCM property theory may be measured, these studies only capture specific aspects of TCM property theory in isolation, overlooking the holistic perspective inherent in TCM. To systematically investigate the modern interpretation of the TCM property theory from multidimensional perspectives, we consulted the Chinese Pharmacopoeia(2020 edition) to compile a list of Chinese materia medica(CMM). Then, using the Latin names of each CMM and gut microbiota as keywords, we searched the PubMed database for relevant research on gut microbiota and CMM. The regulatory patterns of different herbs on gut microbiota were then summarized from the perspectives of the four natures, the five flavors and the meridian tropism. In terms of the four natures, we found that warm-natured medicines promoted the colonization of specific beneficial bacteria,while cold-natured medicines boosted populations of some beneficial bacteria while suppressing pathogenic bacteria. Analysis of the five flavors revealed that sweet-flavored and bitter-flavored CMMs positively influenced beneficial bacteria while inhibiting harmful bacteria. CMMs with different meridian tropism exhibited complex modulative patterns on gut microbiota, with Jueyin(Liver) and Taiyin(Lung) meridian CMMs generally exerting a stronger effect. The gut microbiota may be a biological indicator for characterizing the TCM property theory, which not only enhances our understanding of classic TCM theory but also contributes to its scientific advancement and application in healthcare.

关键词： Traditional Chinese medicine Property theory Gut microbiota Four natures Five flavors Meridian tropism

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Comparison of updated birth weight,length and head circumference charts by gestational age in China with the INTERGROWTH-21 st NCSS charts:a population-based study

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World Journal of Pediatrics 2023年第1期19卷 96-105页

作者： ya-Qin Zhang Hui Li Xin-nan Zong Hua-Hong Wu Department of Growth and Development Capital Institute of PediatricsNo.2Ya Bao RoadChaoyang DistrictBeijingChina

Background INTERGROWTH-21 st Newborn Cross-Sectional Study(NCSS)charts were established and recommended for global ***,whether one international reference is appropriate for all populations is still *** aim to compare the updated Chinese birth size charts by gestational age with INTERGROWTH-21st NCSS *** A cross-sectional survey was carried out,and the birth weight,length and head circumference of 24,375 infants born after uncomplicated pregnancies at gestational age ranging from 24+0 to 42+6 weeks were measured in 13 cities in China from 2015 to *** charts were *** measurements of all these infants were evaluated by the methods of calculating their Z scores using the INTERGROWTH-21 st *** prevalence of small for gestational age(SGA)and large for gestational age(LGA)based on birth weight was analyzed using Chinese charts and INTERGROWTH-21st *** The mean Z scores were 0.10 for birth weight,0.35 for length and-0.02 for head *** to the INTERGROWTH-21st charts,the Chinese birth weight percentile curves were higher except for the 90th percentile at 29-37 weeks gestational age,and the length percentile curves were higher after 33 weeks gestational age,while the 10th percentile of the head circumference was lower and the other percentiles were *** prevalence of SGA was 10.1%[95%confidence interval(CI)=9.7%-10.5%]using the Chinese birth weight chart and 6.5%(95%CI=6.2%-6.8%)using the INTERGROWTH-21 st birth weight *** prevalence of LGA was 9.9%(95%CI=9.5%-10.2%)and 8.2%(95%CI=7.9%-8.6%)using the Chinese and INTERGROWTH-21st birth weight charts,*** Chinese birth size charts based on infants born after uncomplicated pregnancies were different from the INTER-GROWTH-21st *** in the classification of newborns by the two charts should receive attention,and whether the application of INTERGROWTH-21st in Chinese newborns will lead to miscl

关键词： Birth length Birth weight Growth charts Head circumference Newborns

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Molecular Mobility in the Amorphous Phase Determines the Critical Strain of Fibrillation in the Tensile Stretching of Polyethylene

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Chinese Journal of Polymer Science 2020年第7期38卷 740-747,I0006页

作者： Rui Li Guo-Xing yang ya-nan Qin Li Liu Zhi-Yong Jiang School of Chemistry and Chemical Engineering State Key Laboratory of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150001China Daqing Petrochemical Research Center Petrochemical Research InstituteChina National Petroleum CorporationDaqing 163714China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

The microstructural development of bimodal high density polyethylene subjected to tensile deformation was investigated as a function of strain after annealing at different temperatures by means of a scanning synchrotron small angle X-ray scattering(SAXS)*** different deformation mechanisms were activated in sequence upon tensile deformation:intralamellar slipping of crystalline blocks dominates the deformation behavior at small deformations whereas a stress-induced crystalline block fragmentation and recrystallization process occurs at a critical strain yielding new crystallites with the molecular chains preferentially oriented along the drawing *** critical strain associated with the lamellar-to-fibrillar transition was found to be ca.0.9 in bimodal sample,which is significantly larger than that observed for unimodal high-density polyethylene(0.4).This observation is primarily due to the fact that the bimodal sample possesses a greater mobility of the amorphous phase and thereby a reduced modulus of the entangled amorphous *** conclusion of the mobility of the amorphous phase as a determining factor for the critical strain was further proven by the 1H-NMR T2 relaxation *** these findings contribute to our understanding of the excellent slow crack growth resistance of bimodal polyethylene for pipe application.

关键词： SAXS Bimodal high density polyethylene Molecular mobility

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Recent progress on rapid diagnosis of COVID-19 by point-of-care testing platforms

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Chinese Chemical Letters 2024年第3期35卷 66-75页

作者： ya-nan Tang Dingding Jiang Xuejun Wang Yunqi Liu Dacheng Wei State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China Institute of Molecular Materials and Devices Fudan UniversityShanghai 200433China

The outbreak of COVID-19 has drawn great attention around the ***-CoV-2 is a highly infectious virus with occult transmission by many mutations and a long incubation *** particular,the emergence of asymptomatic infections has made the epidemic even more ***,early diagnosis and timely management of suspected cases are essential measures to control the spread of the *** simple,portable,and accurate diagnostic techniques for SARS-CoV-2 is the key to epidemic *** advantages of point-of-care testing technology make it play an increasingly important role in viral detection and *** review summarizes the point-of-care testing platforms developed by nucleic acid detection,immunological detection,and nanomaterial-based biosensors ***,this paper provides a prospect for designing future highly accurate,cheap,and convenient SARS-CoV-2 diagnostic technology.

关键词： COVID-19 Point-of-care testing platforms Nucleic acid detection Asymptomatic infection Biosensors

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Interaction formulae for buckling and failure of orthotropic plates under combined axial compression/tension and shear

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Chinese Journal of Aeronautics 2022年第3期35卷 272-280页

作者： Binwen WANG Xiangming CHEN Xiasheng SUN Puhui CHEN Zhe WANG ya’nan CHAI Aeronautics Science and Technology Key Laboratory of Full Scale Aircraft Structure and Fatigue Aircraft Strength Research Institute of ChinaXi’an 710065China Chinese Aeronautical Establishment Beijing 100029China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

An interaction function was constructed based on the axial compression/tension and shear loads of orthotropic *** coefficients of the polynomial function were determined by uniaxial test *** interaction and failure interaction formulae under combined axial tension/compression and shear loads were *** on the uniaxial load test results of orthotropic plates,the buckling load and bearing capacity under any proportion of the combined loads could be predicted by using the proposed interaction *** buckling interaction curves and failure envelopes predicted by the proposed interaction formulae were in excellent agreement with the test results.

关键词： Buckling Combined loads Failure Interaction formulae Orthotropic plate

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Mechanism of high temperature reduction on iron carbide preparation with low-grade siderite

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Journal of Iron and Steel Research International 2022年第9期29卷 1357-1367页

作者： Dong Chen ya-nan Lv Wei Zhao Fei-bao Wu Wei-ang Ying School of Iron and Steel Soochow UniversitySuzhou 215021JiangsuChina Department of Mechanical and Electrical Engineering Suzhou Institute of Industrial TechnologySuzhou 215104JiangsuChina

The carburization roasting followed by magnetic separation is a feasible method to utilize low-grade siderite *** order to enhance the carburization efficiency and separation effciency,high temperature reduction was carried out,and its mechanism was demonstrated by measuring carburization index,phase change,and microstructure under a carbon-sulfur infrared analyzer,an X-ray diffractometer,and a metallurgical *** results show that both the carburization effciency of siderite pellet and the separation efficiency of iron carbide from gangue are very ***,high temperature reduction is a useful way to enhance the carburization efficiency,as it can accelerate the reduction reaction rate and carburization reaction ***,high temperature reduction can improve the growth of iron carbide particle,promote the carburization efficiency,and strengthen the sodium modification reactions,thereby greatly accelerating the separation efficiency of iron carbide and *** the siderite pellets were reduced at 1050℃ for 90 min and carburized at 650℃ for 120 min,the carburization index of carburized pellets reached *** magnetic separation treatment,an electric furnace burden assaying 83.12 wt.%Fe and 6.96 wt.%C was prepared,and the corresponding iron recovery rate was 95.43%.The high temperature reduction is promisingly adopted to promote the utilization of low-grade siderite ores using carburization-magnetic separation technology.

关键词： Siderite High temperature reduction Carburization-Separation Iron carbide

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