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Cerebral autoregulation-directed optimal blood pressure management reduced the risk of delirium in patients with septic shock

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Journal of Intensive Medicine 2024年第3期4卷 376-383页

作者： Qianyi Peng Xia Liu meilin ai Li Huang Li Li Wei Liu Chunguang Zhao Chenghuan Hu Lina Zhang Department of Critical Care Medicine Xiangya HospitalCentral South UniversityChangshaHunanChina Hunan Provincial Clinical Research Center for Critical Care Medicine Xiangya HospitalCentral South UniversityChangshaHunanChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunanChina

Background When resuscitating patients with septic shock,cerebrovascular reactivity parameters are calculated by monitoring regional cerebral oxygen saturation(rSO_(2))using near-infrared spectroscopy to determine the optimal blood ***,we aimed to analyze the impact of cerebral autoregulation-directed optimal blood pressure management on the incidence of delirium and the prognosis of patients with septic *** This prospective randomized controlled clinical study was conducted in the Xiangya Hospital of Central South University,***-one patients with septic shock(December 2020–May 2022)were enrolled and randomly allocated to the experimental(n=26)or control group(n=25).Using the ICM+software,we monitored the dynamic changes in rSO_(2) and mean arterial pressure(MAP)and calculated the cerebrovascular reactivity parameter tissue oxygen reactivity index to determine the optimal blood pressure to maintain normal cerebral autoregulation function during resuscitation in the experimental *** control group was treated according to the Surviving Sepsis Campaign *** in the incidence of delirium and 28-day mortality between the two groups were compared,and the risk factors were *** The 51 patients,including 39 male and 12 female,had a mean age of(57.0±14.9)*** incidence of delirium was 40.1%(23/51),and the 28-day mortality rate was 29.4%(15/51).The mean MAP during the first 24 h of intensive care unit(ICU)admission was higher([84.5±12.2]mmHg vs.[77.4±11.8]mmHg,P=0.040),and the incidence of delirium was lower(30.8%vs.60.0%,P=0.036)in the experimental group than in the control *** use of cerebral autoregulation-directed optimal blood pressure(odds ratio[OR]=0.090,95%confidence interval[CI]:0.009 to 0.923,P=0.043)and length of ICU stay(OR=1.473,95%CI:1.093 to 1.985,P=0.011)were risk factors for delirium during septic *** drug dose(OR=8.445,95%CI:1.26 to 56.576,P=0.028)and partial pressure of o

关键词： Septic shock Cerebral regional oxygen saturation Optimal blood pressure Delirium Mortality

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Engineering phonon thermal transport in few-layer PdSe_(2)

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Frontiers of physics 2024年第3期19卷 135-141页

作者： meilin Li Huanhuan Sun Jun Zhou Yunshan Zhao Phonon Engineering Research Center of Jiangsu Province Center for Quantum Transport and Thermal Energy ScienceInstitute of Physics Frontiers and Interdisciplinary SciencesSchool of Physics and TechnologyNanjing Normal UniversityNanjing 210023China

Engineering phonon transport in low-dimensional materials has great significance not only for fundamental research,but also for thermal management applications of electric ***,due to the difficulties of micro and nano processing and characterization techniques,the work on tuning phonon transport at nanoscale are *** this work,by introducing Ar+plasma,we probed the phonon transport in two-dimensional(2D)layered semiconductor PdSe_(2)under different defect *** using thermal bridge method,the thermal conductivity was measured to decrease by 50%after a certain Ar+irradiation,which implied a possible phase ***,Raman characterizations were performed to show that the Raman sensitive peaks of PdSe_(2)was red-shifted and finally became disappeared with the increase of defect concentration.“Defect engineering”proves be a practical strategy in tuning the phonon thermal transport in low-dimensional materials,thus providing guidance for potential application in designing thermoelectric devices with various emerging materials.

关键词： phonon transport PdSe_(2) defects thermal bridge method

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Dynamic Event-Triggered Consensus Control for Input Constrained Multi-Agent Systems With a Designable Minimum Inter-Event Time

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 649-660页

作者： meilin Li Yue Long Tieshan Li Hongjing Liang C.L.Philip Chen the School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China IEEE the Yangtze Delta Region Institute University of Electronic Science and Technology of ChinaHuzhou 313000 the Laboratory of Electromagnetic Space Cognition and Intelligent Control Beijing 100089China the School of Computer Science and Engineering South China University of TechnologyGuangzhou 510006

This paper investigates the consensus control of multi-agent systems(MASs) with constrained input using the dynamic event-triggered mechanism(ETM).Consider the MASs with small-scale networks where a centralized dynamic ETM with global information of the MASs is first ***,a distributed dynamic ETM which only uses local information is developed for the MASs with large-scale *** is shown that the semi-global consensus of the MASs can be achieved by the designed bounded control protocol where the Zeno phenomenon is eliminated by a designable minimum inter-event *** addition,it is easier to find a trade-off between the convergence rate and the minimum inter-event time by an adjustable ***,the results are extended to regional consensus of the MASs with the bounded control *** simulations show the effectiveness of the proposed approach.

关键词： Constrained input designable minimum inter-event time directed communication topology dynamic event-triggered mechanism MASs consensus control

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脑氧饱和度监测在脓毒症休克患者中的临床应用价值

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中南大学学报（医学版） 2021年第11期46卷 1212-1219页

作者：彭倩宜张丽娜艾美林黄立艾宇航中南大学湘雅医院重症医学科长沙410008 国家老年疾病临床医学研究中心(湘雅医院) 长沙410008 湖南省重症医学临床医学研究中心长沙410008

目的:脓毒症相关性脑病(sepsis associated encephalopathy,SAE)是脓毒症的一种常见神经并发症,谵妄是SAE的一种常见表现形式。SAE的病理生理学机制尚不明确,现有研究发现线粒体和内皮细胞功能障碍、神经递质异常、钙失调、脑微循环障... 详细信息

目的:脓毒症相关性脑病(sepsis associated encephalopathy,SAE)是脓毒症的一种常见神经并发症,谵妄是SAE的一种常见表现形式。SAE的病理生理学机制尚不明确,现有研究发现线粒体和内皮细胞功能障碍、神经递质异常、钙失调、脑微循环障碍和脑低灌注等可能参与其中。近红外光谱法(near-infrared spectroscopy,NIRS)是一种无创监测区域脑氧饱和度(regional cerebral oxygen saturation,rSO_(2))的方法,也是近年来研究的前沿热点。研究显示重症患者NIRS监测rSO_(2)异常与谵妄相关,且基于NIRS监测的治疗有助于改善患者的器官灌注和预后。本研究旨在通过NIRS监测脓毒症休克患者rSO_(2)的动态变化,并分析其与预后之间的关系。方法:收集2017年8月到2018年5月中南大学湘雅医院重症医学科收治的48例脓毒症休克患者资料,诊断依据欧美危重病医学会指定国际专家制订的脓毒症3.0标准。患者入重症监护室(intensive care unit,ICU)后在双侧前额放置NIRS监测探头对rSO_(2)进行连续动态监测至少6 h,记录rSO_(2)最高值(rSO_(2)max)和最低值(rSO_(2)min),计算rSO_(2)平均值和rSO_(2)变异度。收集患者的一般资料、入ICU 24 h内的实验室检查结果(血常规、肝肾功能、血气分析、感染指标、凝血功能)、评分结果[格拉斯哥昏迷量表(Glasgow Coma Scale,GCS)评分、急性生理学与慢性健康状况评价II(Acute Physiology and Chronic Health Evaluation II,APACHE II)评分、序贯器官衰竭评价(Sequential Organ Failure Assessment,SOFA)评分等]。谵妄的评估采用ICU意识模糊评估法(Confusion Assessment Method for ICU,CAM-ICU)量表。记录患者机械通气(mechanical ventilation,MV)时间、ICU时间、住院时间和28 d病死率。首要结局指标为28 d病死率,次要结局指标为谵妄发生率、ICU时间和住院时间。分析存活与死亡患者、有谵妄与无谵妄患者之间实验室和临床指标的差异,评估谵妄的危险因素,评价rSO_(2)相关指标(rSO_(2)max、rSO_(2)min、rSO_(2)平均值和rSO_(2)变异度)用于预测28 d病死率和谵妄的能力及其界值。结果:脓毒症休克患者总的28 d病死率为47.92%(23/48),谵妄发生率为18.75%(9/48)。死亡患者的rSO_(2)min显著低于存活患者(P=0.042)。谵妄患者的rSO_(2)变异度显著高于无谵妄患者(P=0.006)。谵妄的独立危险因素是rSO_(2)max、直接胆红素(direct bilirubin,DBIL)水平和6 h集束化治疗是否达标。采用rSO_(2)相关指标预测脓毒症休克患者28 d是否死亡,rSO_(2)max、rSO_(2)min、rSO_(2)平均值和rSO_(2)变异度的受试者工作特征曲线下面积(area under the receiver operating characteristic curve,AUROC)分别为0.616、0.606、0.623和0.504;预测脓毒症休克患者是否发生谵妄,rSO_(2)max、rSO_(2)min、rSO_(2)平均值和rSO_(2)变异度的AUROC分别为0.682、0.617、0.580和0.501。rSO_(2)max预测谵妄的最佳界值是77.5%(敏感度为0.444,特异度为0.897),rSO_(2)min预测谵妄的最佳界值是65.5%(敏感度为0.556,特异度为0.744)。结论:rSO_(2)过低、过高或波动过大均与脓毒症休克不良预后和谵妄发生相关,需要引起临床重视。动态监测脓毒症休克患者的rSO_(2)并维持其平稳,可能对该类患者具有重要临床意义。

关键词：区域脑氧饱和度近红外光谱法脓毒症休克谵妄病死率

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Structure design and rice threshing performance of the variable-speed inertial pulley for simulating artificial threshing

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 33-40页

作者： Tiantian Jing Zhong Tang Shuaihua Hao Cheng Shen Ting Wang meilin Wang School of Agricultural Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Key Laboratory of Intelligent Equipment and Robotics for Agriculture of Zhejiang Province Hangzhou 310058China College of Engineering China Agricultural UniversityBeijing 100083China Nanjing Institute of Agricultural Mechanization Ministry of Agriculture and Rural AffairsNanjing 210014China Jiangsu World Agriculture Machinery Co. Ltd(WORLD A/M)Zhenjiang 212311JiangsuChina

Due to the small models and compact structures,small harvesters have also caused problems such as poor threshing separation performance and large loss *** order to solve unstable cleaning effects of small harvesters when they facing different working conditions,this study selected rice plants in hilly areas for the *** breaking force of different parts of mature rice was tested,which revealed the fracture mechanism of each part under the combined *** threshing method was used to simulate artificial plate bin and design three kinds of non-circular pulley variable speed transmission threshing *** the help of transient inertia force,threshing force was *** paper tested the harvesting performance of the variable speed threshing device with the help of the harvest performance *** show when facing the small rice planting area,the T/2 variable speed threshing device has better cleaning performance,and also the harvest loss rate of T/4 variable speed threshing device is the *** with the constant speed threshing device,the impurity content rate of the variable speed threshing device is increased by 0.64%to 8.76%;the loss rate is reduced by 0.45%to 1.79%,which provides a basis for the optimization design of small combine harvester in hilly areas.

关键词： small harvesters fracture mechanism transient inertia force non-circular pulley

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Characteristics of genetic basis copy number variation in production and adaptation traits of Chinese indigenous sheep

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Journal of Genetics and Genomics 2024年第5期51卷 566-569页

作者： meilin Jin Gang Liu Jian Lu Zhiqiang Chen Huihua Wang Taotao Li Caihong Wei State Key Laboratory of Animal Biotech Breeding Institute of Animal SciencesChinese Academy of Agricultural Sciences(CAAS)Beijing 100193China College of Animal Science and Technology China Agricultural UniversityBeijing100193China National Animal Husbandry Service National Center of Preservation&Utilization of Animal Genetic ResourcesBeijing 100125China Glbizzia Biosciences Beijing 102629China

Copy number variations(CNVs)range in size from 50 base pairs(bp)to several megabases(Mb)and encompass various types of structural variations,such as insertions,deletions,duplications,and complex multiallelic events(MacDonald et al.,2014).These genomic alterations modulate phenotype by altering gene dosage and transcriptional regulation,and are key drivers of biological evolution and determinants of genetic diversity and phenotypic *** recent years,CNVs have been detected in the genomes of various livestock species(Yuan et al.,2021;Chen et al.,2022).Upadhyay et al.(2017)conducted a comprehensive analysis of CNV distribution in the European cattle genome and determined that the Kit gene is associated with color-sidedness in English longhorn *** study presented extensive genome-wide information on CNVs in wild,commercial,and local chicken breeds to gain an integrated understanding of the domestication process and exclusively identified the genes involved(Chen et al.,2022).

关键词： sided number dosage

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Reliability ensemble averaging reduces surface wind speed projection uncertainties in the 21st century over China

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Advances in Climate Change Research 2024年第2期15卷 222-229页

作者： Zheng-Tai ZHANG Chang-ai XU Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China

Accurate prediction of future surface wind speed(SWS)changes is the basis of scientific planning for wind *** studies have projected SWS changes in the 21st century over China on the basis of the multi-model ensemble(MME)of the 6th Coupled Model Intercomparison Project(CMIP6).However,the simulation capability for SWS varies greatly in CMIP6 multi-models,so the MME results still have large *** this study,we used the reliability ensemble averaging(REA)method to assign each model different weights according to their performances in simulating historical SWS changes and project the SWS under different shared socioeconomic pathways(SSPs)in *** results indicate that REA considerably improves the SWS simulation capacity of CMIP6,eliminating the overestimation of SWS by the MME and increasing the simulation capacity of spatial *** spatial correlations with observations increased from 0.56 for the MME to 0.85 for ***,REA could eliminate the overestimation of the SWS by 33%in *** for southeastern China,the SWS generally decreases over China in the near term(2020-2049)and later term(2070-2099),particularly under high-emission *** SWS reduction projected by REA is twice as high as that by the MME in the near term,reaching-4%to-3%.REA predicts a larger area of increased SWS in the later term,which expands from southeastern China to eastern *** study helps to reduce the projected SWS uncertainties.

关键词： Surface wind speed Uncertainty Multi-model ensemble Reliability ensemble averaging CMIP6

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A Study on the Assessment and Integration of Multi-Source Evapotranspiration Products over the Tibetan Plateau

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Advances in Atmospheric Sciences 2024年第3期41卷 435-448页

作者： Ming CHENG Lei ZHONG Yaoming MA Han MA Yaoxin CHANG Peizhen LI meilin CHENG Xian WANG Nan GE School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology Hefei 230026China Jiangsu Collaborative Innovation Center for Climate Change Nanjing 210023China Frontiers Science Center for Planetary Exploration and Emerging Technologies University of Science and Technology of ChinaHefei 230026China Land-Atmosphere Interaction and its Climatic Effects Group State Key Laboratory of Tibetan Plateau Earth SystemResources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China College of Atmospheric Science Lanzhou UniversityLanzhou 730000China National Observation and Research Station for Qomolongma Special Atmospheric Processes and Environmental Changes Dingri 858200China Kathmandu Center of Research and Education Chinese Academy of SciencesBeijing 100101China China-Pakistan Joint Research Center on Earth Sciences Chinese Academy of SciencesIslamabad 45320Pakistan

Evapotranspiration(ET)is a crucial variable in the terrestrial water,carbon,and energy *** present,a large number of multi source ET products *** to sparse observations,however,great challenges exist in the evaluation and integration of ET products in remote and complex areas such as the Tibetan Plateau(TP).In this paper,the applicability of the multiple collocation(MC)method over the TP is evaluated for the first time,and the uncertainty of multisource ET products(based on reanalysis,remote sensing,and land surface models)is further analyzed,which provides a theoretical basis for ET data *** results show that 1)ET uncertainties quantified via the MC method are lower in RS-based ET products(5.95 vs.7.06 mm month^(-1))than in LSM ET products(10.22 vs.17.97 mm month^(-1))and reanalysis ET estimates(7.27 vs.12.26 mm month-1).2)A multisource evapotranspiration(MET)dataset is generated at a monthly temporal scale with a spatial resolution of 0.25°across the TP during *** has better performance than any individual product.3)Based on the fusion product,the total ET amount over the TP and its patterns of spatiotemporal variability are clearly *** annual total ET over the entire TP is approximately 380.60 ***,an increasing trend of 1.59±0.85 mm yr^(-1)over the TP is shown during *** study provides a basis for future studies on water and energy cycles and water resource management over the TP and surrounding regions.

关键词： evapotranspiration data fusion multiple collocation the Tibetan Plateau

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Recent progress in MOFs-based nanozymes for biosensing

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Nano Research 2024年第1期17卷 39-64页

作者： Imamdin Chandio Yongjian ai Lei Wu Qionglin Liang MOE Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology Department of ChemistryLaboratory of Flexible Electronics TechnologyCenter for Synthetic and Systems BiologyTsinghua University-Peking University Joint Centre for Life SciencesTsinghua UniversityBeijing 100084China

Nanozymes are nanomaterials with enzyme-mimicking catalytic *** to natural enzymes,nanozymes show various properties such as easy to manufacture,stable,adjustable,and *** play key roles in biosensing,biocatalysis,and disease *** an important kind of nanozymes,metal-organic framework(MOF)-based nanozymes are receiving a lot of attention due to their structural properties and *** developing MOF with enzymes-like catalytic properties has opened new perspectives in *** review summarizes the up-to-date developments in synthesizing two-dimensional and three-dimensional MOF-based nanozymes and their applications in ***,classification of nanozymes obtained by MOFs is categorized,and different properties of MOF-based nanozymes are ***,the distinctive applications of MOF-based nanozymes in identifying various analytes are thoroughly ***,the recent challenges and progressive directions in this area are highlighted.

关键词： metal-organic frameworks nanozymes metal-organic framework (MOF)-based nanozymes biosensing analytes

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Wellbore Cleaning Degree and Hydraulic Extension in Shale Oil Horizontal Wells

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Fluid Dynamics & Materials Processing 2024年第3期20卷 661-670页

作者： Xin ai Mian Chen College of Petroleum Engineering China University of Petroleum(Beijing)BeijingChina Daqing Oil Field Company Limited DaqingChina

The efficient development and exploitation of shale oil depends on long-distance horizontal wells. As the degreeof cleaning of the wellbore plays a key role in these processes, in this study, this problem is investigated experimentallyby focusing on the dimensionless cuttings bed height. A method is proposed to calculate the horizontalwellhydraulic extension taking into account the influence of the wellbore cleaning degree on the wellborepressure distribution and assess the effect of a variety of factors such as the bottom hole pressure, the circulatingpressure drop, the drilling pump performance and the formation properties. The analysis shows that the hydraulicextension of horizontal wells decreases with an increase in the cuttings bed height, and the higher the displacementof drilling fluid, the faster the hydraulic extension declines. The annular pressure drop of the horizontalsection increases with the increase of the cuttings bed height, resulting in a higher bottom-hole pressure. Severalarguments are provided to guide the safe drilling of shale oil horizontal wells and overcome the limits of currenttechnological approaches.

关键词： Shale oil horizontal well hydraulic extension wellbore cleaning degree pressure distribution mechanism analysis

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