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基于ARIMA模型与GM(1,1)模型比较的宁夏卫生总费用及其构成预测研究

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中国医疗管理科学 2025年第1期15卷 57-63页

作者：周燕许静怡宁夏医科大学人文与管理学院银川750004

目的比较ARIMA模型和GM(1,1)模型对宁夏卫生费用的拟合效果,并预测宁夏卫生总费用及其构成的未来发展趋势,为相关部门制定和调整医疗卫生政策提供参考。方法利用2016年—2022年宁夏卫生总费用及其构成的相关数据,分别构建ARIMA模型和GM(... 详细信息

目的比较ARIMA模型和GM(1,1)模型对宁夏卫生费用的拟合效果,并预测宁夏卫生总费用及其构成的未来发展趋势,为相关部门制定和调整医疗卫生政策提供参考。方法利用2016年—2022年宁夏卫生总费用及其构成的相关数据,分别构建ARIMA模型和GM(1,1)模型,进行卫生总费用构成的拟合,采用平均绝对误差(Mean Absolute Error,MAE)和均方根误差(Root Mean Square Error,RMSE)比较拟合效果,基于优势模型对宁夏2023年—2028年卫生总费用及其构成进行预测。结果GM(1,1)模型拟合效果较好,为优势模型。预测结果显示,2023年—2028年,宁夏卫生总费用平稳增长,从465.38亿元增长至671.50亿元,政府和个人卫生支出占卫生总费用的比重分别从32.35%和25.39%下降至31.63%和22.53%,社会卫生支出占卫生总费用的比重从42.25%上升至45.84%。结论经预测,2023年—2028年宁夏卫生总费用呈逐年增长趋势,卫生费用筹资结构趋于合理化,相关部门应继续保持目前发展态势,采取有效措施以促进医疗卫生事业的可持续发展。

关键词： ARIMA模型 GM(1 1)模型卫生总费用预测研究

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甲烷氧化菌利用不同氮源生产单细胞蛋白

石油化工 2025年第1期54卷 84-91页

作者：贺姣孙立瑞辛嘉英张卫丹宋琪徐景懿哈尔滨商业大学食品工程学院食品科学与工程重点实验室黑龙江哈尔滨150076 中国科学院兰州物理化学研究所羰基合成与选择氧化国家重点实验室甘肃兰州730000

以甲烷为碳源和能源的甲烷氧化菌(MOB),在不同氮源下,通过金属Cu^(2+)调控甲烷单加氧酶(MMO)的表达,探究不同MMO表达对MOB生产单细胞蛋白(SCP)产量的影响。采用在可溶性甲烷单加氧酶(sMMO)和颗粒性甲烷单加氧酶(pMMO)表达下以硝态氮、... 详细信息

以甲烷为碳源和能源的甲烷氧化菌(MOB),在不同氮源下,通过金属Cu^(2+)调控甲烷单加氧酶(MMO)的表达,探究不同MMO表达对MOB生产单细胞蛋白(SCP)产量的影响。采用在可溶性甲烷单加氧酶(sMMO)和颗粒性甲烷单加氧酶(pMMO)表达下以硝态氮、铵态氮和氮气为氮源对MOB进行培养,以细胞产率、SCP产量、特征性MMO活性和固氮酶活性为主要指标,观察不同MMO表达下氮源种类对MOB生长和SCP产量的影响。实验结果表明,以硝态氮为氮源培养的MOB的SCP产量在pMMO表达时比sMMO表达高9.2%,而以铵态氮为氮源培养的MOB在sMMO表达时SCP产量更高,以氮气为氮源培养的MOB生产SCP产量最低。

关键词：甲烷氧化菌氮源单细胞蛋白颗粒性甲烷单加氧酶可溶性甲烷单加氧酶固氮酶

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Challenges and perspectives of covalent organic frameworks for advanced alkali-metal ion batteries

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Science China Chemistry 2021年第8期64卷 1267-1282页

作者： jingyi xu Yifan xu Chenling Lai Tingting Xia Beining Zhang Xiaosi Zhou Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China

Covalent organic frameworks(COFs)are a class of porous crystalline polymers that have been widely investigated in various fields,including energy storage,photo/electrocatalysis,drug *** covalent-bond interconnection allows COFs extraordinary chemical and thermal stability,and the porous structure ensures a high ion-diffusion *** merits compensate for the drawbacks of organic electrodes that are easy to dissolve and have low charge conductivity,and promote the development of novel electrode materials with excellent performance,environmental friendliness,and low ***,the application of COFs also encountered many problems,such as poor electronic conductivity due to the large band ***,in some three-dimensional(3D)COFs and stacked two-dimensional(2D)COFs,the huge crystal structure,aligned ultralong channels,and numerous crystal defects usually impede ion transport,and the large molecular weights of COFs generally decrease the specific *** issues are urgently needed to be *** in this review,we summarize the latest progress,core challenges and coping strategies concerning with the use of COFs in alkali-metal ion batteries,discuss the impact of material structure on energy storage,and propose strategies for the construction of high-performance COF-based electrodes.

关键词： covalent organic frameworks alkali-metal ion batteries cathode anode structural design

Crown ether-assisted room-temperature halide passivation for highefficiency PbS quantum dots enabling large-area and long-lifetime near-infrared QD-OLEDs

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Nano Research 2023年第5期16卷 7537-7544页

作者： Zhen Jia Haoyun Shao jingyi xu Yu Dai Juan Qiao Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China Laboratory for Flexible Electronics Technology Tsinghua UniversityBeijing 100084China

High-efficiency and low-cost near-infrared(NIR)emitting quantum dots(QDs)are highly desirable for next-generation intrinsically flexible NIR light *** passivation is commonly employed to passivate surface traps to obtain high-quality NIRemitting PbS QDs,but this procedure requires high temperature and inert *** we develop a facile roomtemperature halide passivation method for highly efficient NIR-emitting PbS QDs by employing crown ethers as a unique auxiliary *** and theoretical investigations reveal that the formation of K^(+)-crown ethers complex effectively facilitates the dissociation of KCl in toluene and releases more Cl^(−)ions for extraordinary halide passivation at room temperature and in the air,thus improving the photoluminescence quantum yield from 24%to 35%in solution and further to 44%in blend *** well-passivated PbS QD films are integrated with red organic light-emitting diodes(OLEDs)and the resulting QDOLEDs exhibit high-performance NIR emission centered at 887 nm,a high external quantum efficiency of 5.2%at a radiance of 10 W·sr^(−1)·m^(−2),superior operational stability with long lifetime T90 of 188 h at the current density of 25 mA·cm^(−2).We also construct a large-area NIR QD-OLED(5 cm×5 cm)with desirable uniform *** work opens a new avenue to achieve robust large-area NIR planar light sources for broad applications.

关键词： near-infrared emission PbS quantum dot chloride surface passivation crown ether light-emitting diode

Ultrafine SnSSe/multilayer graphene nanosheet nanocomposite as a high-performance anode material for potassium-ion half/full batteries

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Journal of Energy Chemistry 2021年第9期30卷 241-248页

作者： Zuyue Yi jingyi xu Zhenhua xu Min Zhang Yanan He Jianchun Bao Xiaosi Zhou Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina

Layer-structured Shsse attracts much attention as an anode material for potassium storage due to its la rge theoretical ***,their practical application is severely restrained by the dramatic volumetric variation of ***,we synthesize ultrafine SnSSe/multilayer graphene nanosheet(SnSSe/MGS) by a vacuum solid-phase reaction and subsequent ball *** to the strong synergistic effect between the two components,the obtained SnSSe/MGS nanocomposite exhibits a high reversible capacity(423 mAh g^(-1) at 100 mA g^(-1)),excellent rate property(218 mAh g^(-1) at 5 A g^(-1)),and stable cycling performance(271 mAh g^(-1) after 500 cycles at 100 mA g^(-1)) in potassium-ion half ***,the full cell assembled by the SnSSe/MGS anode and the potassiated 3,4,9,10-perylene-tetracar boxylic aciddianhydride cathode shows excellent electrochemical performance between 0.2 and 3.3 V(209 mAh g^(-1) at 50 mA g^(-1) after 100 cycles).The presented two-step synthesis strategy of SnSSe/MGS may also provide ideas to craft other alloy-type anode materials.

关键词： Ultrafine SnSSe Multilayer graphene nanosheet Potassium-ion batteries Anode Full cell

债券评级市场对外开放下我国信用评级质量研究

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中国证券期货 2025年第1期 55-65,77页

作者：许静怡鲁统宇袁伟中国计量大学经济与管理学院杭州310018

自我国2017年开放评级市场以来,标普、穆迪和惠誉等国际评级机构相继进入,评级行业竞争格局的改变对评级质量也产生影响。本文以2014—2023年国内银行间和交易所发行的企业债债项评级、主体评级为样本,研究评级市场对外开放政策对评级... 详细信息

自我国2017年开放评级市场以来,标普、穆迪和惠誉等国际评级机构相继进入,评级行业竞争格局的改变对评级质量也产生影响。本文以2014—2023年国内银行间和交易所发行的企业债债项评级、主体评级为样本,研究评级市场对外开放政策对评级质量的影响。研究发现:评级市场对外开放政策有效抑制了我国评级虚高现象;进一步研究发现,评级市场的对外开放政策增强了信用评级降低信用利差作用,表明我国评级质量实现提升。基于研究结论,提出在评级市场国际化进程中,利用行业监管有效实现国内评级结果“引进来”和“走出去”的政策建议。

关键词：对外开放行业竞争评级质量行业监管

Recent Progress and Prospects of Layered Cathode Materials for Potassium-ion Batteries

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Energy & Environmental Materials 2021年第2期4卷 178-200页

作者： Jiaying Liao Yu Han Zhuangzhuang Zhang jingyi xu Jianbo Li Xiaosi Zhou Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China

Layered materials with two-dimensional ion diffusion channels and fast kinetics are attractive as cathode materials for secondary ***,one main challenge in potassium-ion batteries is the large ion size of K^(+),along with the strong K^(+)-K^(+)electrostatic *** strong interaction results in initial K deficiency,greater voltage slope,and lower specific capacity between set voltage ranges for layered transition metal *** this review,a comprehensive review of the latest advancements in layered cathode materials for potassium-ion batteries is *** for layered transition metal oxides,some polyanionic compounds,chalcogenides,and organic materials with the layered structure are introduced ***,summary and personal perspectives on future optimization and structural design of layered cathode materials are constructively *** strongly appeal to the further exploration of layered polyanionic compounds and have demonstrated a series of novel layered structures including layered K_(3)V_(2)(PO_(4))_(3).

关键词： cathode layered material potassium-ion battery structural regulation

Measures to address the stalled development of health law education in Chinese universities

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Global Health Research and Policy 2022年第1期7卷 125-130页

作者： jingyi xu Yue Wang Georgetown University Law Center/O’Neil Institute for National and Global Health Law 600 New Jersey AvenueNWWashingtonDC 20001USA School of Health Humanities Peking UniversityNo.38 Xueyuan RoadHaidian DistrictBeijing 100191China

Health law education,an important part of global health education,is beneficial for both medical and law *** field can help lawyers and policy makers to develop their careers and equip traditional health professionals,such as doctors and nurses,with a basic knowledge of health ***,unlike in western universities,health law education in China is still at its infant stage and,as such,lacks a systematic pedagogical approach among institutions of higher education in *** the advancements in the field of health law education,this study systematically reviews the status of health law education in institutions of higher learning in China and suggests ways to make the pedagogical approach more *** systematic review revealed that,between 2012 and 2021,major law schools and medical schools that have developed the subject of health law education in China lack consensus on the aim,scope,mode,and methods of health law *** first problem is that Chinese universities are unable to agree on how to classify the subject of health *** set of problems relate to institutions *** only do universities lack qualified health law faculty,but they also rely on relatively uninspiring teaching *** leads to ineffective,generic pedagogical approaches in both medical and law *** problems leave future lawyers,future doctors and nurses unclear about their choices for health law study at the graduate level and their ultimate career *** therefore propose four preliminary solutions to continue to develop this new interdisciplinary subject—health law education—in Chinese universities:clearly classify the subject of health law,equip the health law field with more professional textbooks,enact joint degree programs between medical schools and law schools,and establish a health law research center in either law schools or medical schools.

关键词： Health law Health education Interdisciplinary subject Systematic pedagogy China

Sn_(4)P_(3)nanoparticles confined in multilayer graphene sheets as a high-performance anode material for potassium-ion batteries

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Journal of Energy Chemistry 2022年第3期31卷 413-421,I0011页

作者： Yichen Du Zuyue Yi Bingbing Chen jingyi xu Zhuangzhuang Zhang Jianchun Bao Xiaosi Zhou Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina

Phosphorus-based anodes are highly promising for potassium-ion batteries(PIBs)because of their large theoretical ***,the inferior potassium storage properties caused by the poor electronic conductivity,easy self-aggregation,and huge volumetric changes upon cycling process restrain their practical *** we impregnate Sn_(4)P_(3)nanoparticles within multilayer graphene sheets(Sn_(4)P_(3)/MGS)as the anode material for PIBs,greatly improving its potassium storage ***,the graphene sheets can efficiently suppress the aggregation of Sn_(4)P_(3)nanoparticles,enhance the electronic conductivity,and sustain the structural *** addition,plenty of Sn_(4)P_(3)nanoparticles impregnated in MGS offer a large accessible area for the electrolyte,which decreases the diffusion distance for K^(+)and electrons upon K^(+)insertion/extraction,resulting in an improved rate ***,the optimized Sn_(4)P_(3)/MGS containing 80 wt%Sn_(4)P_(3)(Sn_(4)P_(3)/MGS-80)exhibits a high reversible capacity of 378.2 and 260.2 m Ah g;at 0.1 and 1 A g^(-1),respectively,and still delivers a large capacity retention of 76.6%after the 1000th cycle at 0.5 A g^(-1).

关键词： Sn4P3 Multilayer graphene sheets Ball milling Potassium-ion batteries Anode