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新冠肺炎感染人群的人口学分析--以我国10省市区为例

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人口与发展 2020年第3期26卷 73-85,64页

作者：晏月平李忠骥云南大学人口研究所云南昆明650091

新型冠状病毒(2019-nCoV)肺炎疫情在湖北武汉爆发后,陆续扩散到全国31个省市区。我国疫情防控形势十分严峻。目前,学界大多基于传染病的防治与治疗等视角对新冠肺炎疫情展开研究,本文选取公布新冠肺炎患者个体信息最为详细的10省区市作... 详细信息

新型冠状病毒(2019-nCoV)肺炎疫情在湖北武汉爆发后,陆续扩散到全国31个省市区。我国疫情防控形势十分严峻。目前,学界大多基于传染病的防治与治疗等视角对新冠肺炎疫情展开研究,本文选取公布新冠肺炎患者个体信息最为详细的10省区市作为研究对象,并根据当地经济社会发展现状,以新冠肺炎病毒自身传播性强、感染率高、潜伏期长等特征为基础,从人口学视角出发,归纳并总结新冠肺炎感染群体所呈现出的典型特征,并深入分析其原因。这一定意义上,有助于相关部门客观掌握新冠疫情发展趋势,科学评估疫情风险,灵活、具体地制定防控策略和措施。

关键词：新冠肺炎感染群体疫情防治人口学分析

Clinical study on the relationship between liver cirrhosis,ascites,and hyponatremia

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 751-758页

作者： Xuan-ji li Hui-Hui Meng Department of Gastroenterology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022Hubei ProvinceChina Department of Hepatology Hubei Provincial Hospital of Traditional Chinese MedicineWuhan 430065Hubei ProvinceChina

BACKGROUND Cirrhosis is a common liver disease,and ascites is one of the common clinical ***,the clinical manifestations of ascites combined with hyponatremia as a high-risk condition and its relationship to patient prognosis have not been fully *** To explore the clinical manifestations,prognostic factors,and relationships of ascites with hyponatremia in patients with cirrhosis to provide better diagnostic and treatment *** In this study,we retrospectively analyzed the clinical data of 150 patients diagnosed with cirrhosis and ascites between 2017 and *** were divided into two groups:ascites combined with hyponatremia group and ascites *** compared the general characteristics,degree of hyponatremia,complications,treatment,and prognosis between the two *** In the study results,patients in the ascites combined with hyponatremia group showed an older average age(58.2±8.9 years),64.4%were male,and had a significantly longer hospitalization time(12.7±5.3 d).Hyponatremia was more severe in this group,with a mean serum sodium concentration of 128.5±4.3 mmol/L,which was significantly different from the ascites group of 137.6±2.1 mmol/*** with ascites and hyponatremia were more likely to develop hepatic encephalopathy(56.2%vs 39.0%),renal impairment(45.2%vs 28.6%)and infection(37.0%vs 23.4%).Regarding treatment,this group more frequently used diuretics(80.8%vs 62.3%)and salt supplements(60.3%vs 38.9%).Multiple logistic regression analysis identified older age[Odds ratio(OR)=1.06,P=0.025]and male gender(OR=1.72,P=0.020)as risk factors for hyponatremia combined with ***,patients with ascites and hyponatremia present a clear high-risk status,accompanied by severe complications and poor *** In patients with cirrhosis,ascites with hyponatremia is a high-risk condition that is often associated with severe complications.

关键词： liver cirrhosis Ascites Hyponatremia Risk Complications

Mechanical reliable,NIR light-induced rapid self-healing hydrogel electrolyte towards flexible zinc-ion hybrid supercapacitors with low-temperature adaptability and long service life

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Journal of Energy Chemistry 2024年第5期92卷 63-73页

作者： Tengjia Gao Na li Yang Yang jing li Peng ji Yunlong Zhou jianxiong Xu School of Materials and Advanced Manufacturing Hunan Key Laboratory of Electrochemical Green Metallurgy TechnologyHunan University of TechnologyZhuzhou 412007HunanChina School of life Sciences and Chemistry Hunan Key Laboratory of Biomedical Nanomaterials and DevicesHunan University of TechnologyZhuzhou 412007HunanChina

Hydrogel electrolytes hold great potential in flexible zinc ion supercapacitors(ZICs)due to their high conductivity,good safety,and ***,freezing of electrolytes at low temperature(subzero)leads to drastic reduction in ionic conductivity and mechanical properties that deteriorates the performance of flexible ***,the mechanical fracture during arbitrary deformations significantly prunes out the lifespan of the flexible ***,a Zn^(2+)and li^(+)co-doped,polypyrrole-dopamine decorated Sb_(2)S_(3)incorporated,and polyvinyl alcohol/poly(N-(2-hydroxyethyl)acrylamide)double-network hydrogel electrolyte is constructed with favorable mechanical reliability,anti-freezing,and self-healing *** addition,it delivers ultra-high ionic conductivity of 8.6 and 3.7 S m^(-1)at 20 and−30°C,respectively,and displays excellent mechanical properties to withstand tensile stress of 1.85 MPa with tensile elongation of 760%,together with fracture energy of 5.14 MJ m^(-3).Notably,the fractured hydrogel electrolyte can recover itself after only 90 s of infrared illumination,while regaining 83%of its tensile strain and almost 100%of its ionic conductivity during−30–60°***,ZICs coupled with this hydrogel electrolyte not only show a wide voltage window(up to 2 V),but also provide high energy density of 230 Wh kg^(-1)at power density of 500 W kg^(-1)with a capacity retention of 86.7%after 20,000 cycles under 20°***,the ZICs are able to retain excellent capacity even under various mechanical deformation at−30°*** contribution will open up new insights into design of advanced wearable flexible electronics with environmental adaptability and long-life span.

关键词： Flexible zinc ion supercapacitor Hydrogel electrolyte Self-healing Anti-freezing

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飞秒激光在角膜屈光手术应用中的并发症

眼科新进展 2015年第2期35卷 197-200页

作者：李仲佶李雪哈尔滨医科大学附属第一医院眼科视光学中心黑龙江省哈尔滨市150001

飞秒激光是一种以脉冲发射的低能量红外线激光,具有切削精确、安全性高、重复性好等特点,可用于角膜屈光手术中制作角膜瓣、角膜基质内切割、制作角膜切口等。尽管飞秒激光的应用使得角膜屈光手术更加安全,但仍然存在一些不容忽视的并发... 详细信息

飞秒激光是一种以脉冲发射的低能量红外线激光,具有切削精确、安全性高、重复性好等特点,可用于角膜屈光手术中制作角膜瓣、角膜基质内切割、制作角膜切口等。尽管飞秒激光的应用使得角膜屈光手术更加安全,但仍然存在一些不容忽视的并发症,本文就飞秒激光在角膜屈光手术中的并发症作一综述。

关键词：飞秒激光角膜屈光手术并发症

Impacts of Aggregation Methods and Trophospecies Number on the Structure and Function of Marine Food Webs

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Journal of Ocean University of China 2024年第1期23卷 190-198页

作者： li Pengcheng ZHANG Chongliang XU Binduo ji Yupeng li Fan REN Yiping XUE Ying Laboratory of Fisheries Ecosystem Monitoring and Assessment College of FisheriesOcean University of ChinaQingdao 266003China Field Observation and Research Station of Haizhou Bay Fishery Ecosystem Ministry of EducationQingdao 266003China Shandong Marine Resources and Environment Research Institute Shandong Provincial Key Laboratory of Restoration for Marine EcologyYantai 264006China Laboratory for Marine Fisheries Science and Food Production Processes Laoshan LaboratoryQingdao 266237China

Aggregation of species with similar ecological properties is one of the effective methods to simplify food web ***,species aggregation will affect not only the complexity of modeling process but also the accuracy of models’*** of aggregation methods and the number of trophospecies are the keys to study the simplification of food *** this study,three aggregation methods,including taxonomic aggregation(TA),structural equivalence aggregation(SEA),and self-organizing maps(SOM),were analyzed and compared with the linear inverse model–Markov Chain Monte Carlo(liM-MCMC)*** of aggregation methods and trophospecies number on food webs were evaluated based on the robustness and unitless of ecological net-work *** showed that aggregation method of SEA performed better than the other two methods in estimating food web structure and function *** effects of aggregation methods were driven by the differences in species aggregation principles,which will alter food web structure and function through the redistribution of energy *** to the results of mean absolute percentage error(MAPE)which can be applied to evaluate the accuracy of the model,we found that MAPE in food web indices will increase with the reducing trophospecies number,and MAPE in food web function indices were smaller and more stable than those in food web structure ***,trade-off between simplifying food webs and reflecting the status of ecosystem should be con-sidered in food web *** findings highlight the importance of aggregation methods and trophospecies number in the analy-sis of food web *** study provided a framework to explore the extent to which food web models are affected by dif-ferent species aggregation,and will provide scientific basis for the construction of food webs.

关键词： liM-MCMC model species aggregation trophospecies number aggregation methods food web indices

Dielectric response of ANb_(2)O_(6)(A = Zn, Co, Mn, Ni) columbite niobates: From microwave to terahertz

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Journal of Advanced Ceramics 2024年第8期13卷 1189-1197页

作者： Weijia Luo Shun Wang Siyong Zheng jining li Menglong Wang Yongzheng Wen ingxia li ji Zhou State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Institute of Laser and Optoelectronics School of Precision Instrument and Opto-Electronics EngineeringTianjin UniversityTianjin 300072China Shandong Inspur Artificial Intelligence Research Institute Co. Ltd.Jinan 250013China School of Microelectronics Tianjin UniversityTianjin 300072China

In the upcoming 6-generation(6G)revolution,the achievement of low power consumption has become a key objective in research concerning terahertz *** an important component of passive devices,there are very few low-loss dielectric ceramics in the terahertz *** elucidate the mechanism of loss and promote the application of microwave dielectric ceramics for future 6G technology(covering microwave and terahertz frequencies),the terahertz responses of ANb_(2)O_(6)(A=Zn,Co,Mn,and Ni)columbite niobates were *** influences of magnetic loss on the Qxf values in the microwave range with different transition metal ions in the A-site were reasonably ***,due to the weakened magnetic relaxation properties in the terahertz range,the samples all exhibited low loss and approximate transparency,especially for MnNb_(2)O_(6) and NiNb_(2)O_(6)(tanolidate the applicability of the ANb_(2)O_(6) system in the terahertz band,which is highly important for the development of terahertz ceramic-based passive devices.

关键词： columbite niobates terahertz response transition metal ions magnetic loss ceramic-based metamaterials

Extraordinary stability of surfactant-free bubbles suspended in ultrasound

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Droplet 2024年第2期3卷 146-152页

作者： Xiaoliang ji Wenxuan zhong Kangqi liu Yichen jiang Hongyue Chen Wei Zhao Duyang Zang School of Physical Science and Technology Northwestern Polytechnical UniversityXi'anChina Shaanxi liquid Physics Research Center Xi'anChina School of Marine Science and Technology Northwestern Polytechnical UniversityXi'anChina State Key Laboratory of Photon-Technology in Western China Energy International Scientific and Technological Cooperation Base of Photoelectric Technology and Functional Materials and ApplicationInstitute of Photonics and Photon-TechnologyNorthwest UniversityXi'anChina

Gravity-induced drainage is one of the main destabilizing mechanisms for soap bubbles and *** we show that solely through acoustic levitation without introducing any chemical stabilizers,liquid drainage in the bubble film can be completely inhibited,therefore leading to a significant enhancement of bubble lifetime by more than two orders of magnitude and enabling the bubble to survive puncturing by a *** on sound simulation and force analysis,it has been found that acoustic radiation force,exerted on both the inner and outer surfaces of the levitated bubble,acts in opposite directions,thus providing a squeezing effect to the bubble *** hydrostatic pressure that induces drainage has been balanced by the acoustic radiation pressure exerted on both sides of the film,which is at the origin of the sound stabilization *** study provides new insights into the interplay between sound and soap bubbles or films,thus stimulating a wide range of fundamental research concerning bubble films and expanding their applications in bio/chemical reactors.

关键词： bubble sound ordinary

Analysis of Weakly Nonlinear Evolution Characteristics of Flow in the Constant Curvature Bend

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Advances in Applied Mathematics and Mechanics 2024年第1期16卷 101-121页

作者： Bin li Haijue Xu Yuchuan Bai Ziqing ji Skate Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Institute for Sedimentation on River and Coastal Engineering Tianjin 300072China

The meandering river is an unstable system with the characteristic of nonlinearity,which results from the instability of the flow and *** on the hydrodynamic nonlinearity of the bend,we use the weakly nonlinear theory and perturbation method to construct the nonlinear evolution equations of the disturbance amplitude and disturbance phase of two-dimensional flow in meandering *** influence of the curvature,Re and the disturbance wave number on the evolution of disturbance amplitude and disturbance phase are ***,the spatial and temporal evolution of the disturbance vorticity is *** research results show:that the curvature makes the flow more stable;that in the evolution of the disturbance amplitude effected by curvature,Re and the disturbance wave number,exist nonlinear attenuation with damping disturbances,and nonlinear explosive growth with positive disturbances;that the asymmetry distribution of the disturbance velocities increases with the curvature;that the location of the disturbance vorticity’s core area changes periodically with disturbance phase,and the disturbance vorticity gradually attenuates/increases with the decrease of the disturbance phase in the evolution process of damping/positive *** results shed light on the construction of the interaction model of hydrodynamic nonlinearity and geometric nonlinearity of bed.

关键词： Curvature bend hydrodynamics weakly nonlinearity disturbance vorticity

Cell Mechanics Regulates the Dynamic Anisotropic Remodeling of Fibril Matrix at Large Scale

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Research 2024年第3期2023卷 401-415页

作者： Mingxing Ouyang Yanling Hu Weihui Chen Hui li Yingbo ji linshuo Qiu linlin Zhu Baohua ji Bing Bu linhong Deng Institute of Biomedical Engineering and Health Sciences School of Medical and Health Engineering and School of PharmacyChangzhou UniversityChangzhou213164China Institute of Biomechanics and Applications Department of Engineering MechanicsZhejang UniversityHangzhou310027China.

living tissues often have anisotropic and heterogeneous organizations, in which developmental processes are coordinated by cells and extracellular matrix modeling. Cells have the capability of modeling matrix in long distance;however, the biophysical mechanism is largely unknown. We investigated the dynamic remodeling of collagen I (COL) fibril matrix by cell contraction with designed patterns of cell clusters. By considering cell dynamic contractions, our molecular dynamics simulations predicted the anisotropic patterns of the observed COL bundling in experiments with various geometrical patterns without spatial limitation. The pattern of COL bundling was closely related to the dynamic remodeling of fibril under cell active contraction. We showed that cell cytoskeletal integrity (actin filaments and microtubules), actomyosin contractions, and endoplasmic reticulum calcium channels acting as force generations and transductions were essential for fiber bundling inductions, and membrane mechanosensory components integrin and Piezo played critical roles as well. This study revealed the underlying mechanisms of the cell mechanics-induced matrix remodeling in large scales and the associated cellular mechanism and should provide important guidelines for tissue engineering in potential biomedical applications.

关键词： contraction Dynamic Matrix