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Early Kinetics of Procalcitonin in Predicting Surgical Outcomes in Type A Aortic Dissection Patients

Chinese Medical Journal 2017年第10期130卷 1175-1181页

作者： Hua Liu Zhe Luo Lan Liu Xiao-Mei Yang Ya-Min Zhuang Ying Zhang guo-Wei Tu guo-guang ma guang-Wei Hao Jian-Feng LUO Ji-Li Zheng Chun-Sheng Wang Department of Intensive Care Medicine Zhongshan Hospital Fudan University Shanghai 200032 China Department of Biostatistics School of Public Health Fudan University Shanghai 200032 China Department of Cardiac Surgery Zhongshan Hospital Fudan University Shanghai 200032 China

Background： In cardiac surgery, elevation of procalcitonin （PCT） could be observed postoperatively in the absence of any evidence of infection and also seems to be a prognostic marker. PCT levels measured in patients undergoing Type A aortic dissection （TAAD） were used to determine prognostic values for complications and surgical outcomes. Methods： Measurements of PCT, C-reactive protein （CRP）, and leukocyte count were observed in TAAD surgery patients （n = 251 ; average age： 49.02 ± 12.83 years; 78.5% male） at presurgery （TO） and 24 h （T1）, 48 h （T2）, and 7 days （T3） postsurgery. PCT clearance （PCTc） oll days 2 and 7 was calculated：（PCTd - PCTd,±,, d,,v）/PCTdx 100%. Endotracheal intubation duration, length of stay （LOS） in the Intensive Care Unit （1CU）/hospital, and complications were recorded± Results： PCT peaked 24 h postsurgery （median 2.73 ng/ml） before decreasing, Correlation existed between PCT levels at T1 and duration of cardiopulmonary bypass （P = 0.001, r = 0.278）. Serum PCT concentrations were significantly higher in nonsurvivor and multiple organ dysfunction syndrome groups on all postoperative days. PCT levels at T1 correlated with length of time of ventilation support and ICU/hospital LOS. Comparing PCT values of survivors versus nonsurvivors, a PCT cutoff level of 5.86 ng/ml at T2 had high sensitivity （70.6%） and specificity （74.3%） in predicting in-hospital death. PCTc-day 2 and 7 were significantly higher in survivor compared with nonsurvivor patients （38% vs. 8%, P = 0.012, 83% vs. -39%, P 〈 0.001）. A PCTc-day 7 cutoff point of 48.7% predicted survival with high sensitivity （77.8%） and specificity （81.8%）. Conclusions： PCT level and PCTc after TAAD surgery might serve as early prognostic markers to predict postoperative outcome. PCT measurement may help identify high-risk patients.

关键词： Perioperative Period Procalcitonin: Sensitivity Specificity Type A Aortic Dissection

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Bandgap characteristics analysis and graded design of a novel metamaterial for flexural wave suppression

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Applied mathematics and Mechanics(English Edition) 2025年第1期46卷 1-24页

作者： Fan YANG Zhaoyang ma Xingming guo Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering ScienceShanghai University Shanghai Institute of Aircraft Mechanics and Control

A novel elastic metamaterial is proposed with the aim of achieving lowfrequency broad bandgaps and bandgap regulation. The band structure of the proposed metamaterial is calculated based on the Floquet-Bloch theorem, and the boundary modes of each bandgap are analyzed to understand the effects of each component of the unit cell on the bandgap formation. It is found that the metamaterials with a low elastic modulus of ligaments can generate flexural wave bandgaps below 300 Hz. Multi-frequency vibrations can be suppressed through the selective manipulation of bandgaps. The dual-graded design of metamaterials that can significantly improve the bandgap width is proposed based on parametric studies. A new way that can regulate the bandgap is revealed by studying the graded elastic modulus in the substrate. The results demonstrate that the nonlinear gradient of the elastic modulus in the substrate offers better bandgap performance. Based on these analyses, the proposed elastic metamaterials can pave the way for multi-frequency vibration control, low-frequency bandgap broadening, and bandgap tuning.

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交通诱导系统智能化方案及其仿真研究

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系统工程学报 2002年第4期17卷 323-328,357页

作者：贺国光马寿峰天津大学系统工程研究所天津300072

交通流过程是不确定性很强的复杂过程 ,用传统的理论方法已经不可能有效解决交通流控制与诱导问题 ,交通诱导系统 (route guidance system,RGS)必须智能化 .该文评述了基于动态交通分配模型的交通诱导方法 ,指出其存在着模型理想化、局... 详细信息

交通流过程是不确定性很强的复杂过程 ,用传统的理论方法已经不可能有效解决交通流控制与诱导问题 ,交通诱导系统 (route guidance system,RGS)必须智能化 .该文评述了基于动态交通分配模型的交通诱导方法 ,指出其存在着模型理想化、局限于解析模型和忽视了人的参与作用等问题 .提出了 RGS的一种智能化方案 ,介绍了基于学习机制来实现交通流短时预测和推理得出交通诱导信息的原理 ,给出了交通诱导智能系统的结构 ,用仿真研究的结果说明了原理的有效性 .

关键词：交通诱导系统智能化仿真不确定性机器学习交通流交通系统

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Exosomes:the next-generation therapeutic platform for ischemic stroke

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Neural Regeneration Research 2025年第5期20卷 1221-1235页

作者： Wenjing Yin Hongyin ma Yang Qu Jiaxin Ren Yingying Sun Zhen-Ni guo Yi Yang Stroke Center Department of NeurologyFirst Hospital of Jilin UniversityChangchunJilin ProvinceChina Neuroscience Research Center Department of NeurologyFirst Hospital of Jilin UniversityChangchunJilin ProvinceChina

Current therapeutic strategies for ischemic stroke fall short of the desired objective of neurological functional ***,there is an urgent need to develop new methods for the treatment of this *** are natural cell-derived vesicles that mediate signal transduction between cells under physiological and pathological *** have low immunogenicity,good stability,high delivery efficiency,and the ability to cross the blood–brain *** physiological properties of exosomes have the potential to lead to new breakthroughs in the treatment of ischemic *** rapid development of nanotechnology has advanced the application of engineered exosomes,which can effectively improve targeting ability,enhance therapeutic efficacy,and minimize the dosages *** in technology have also driven clinical translational research on *** this review,we describe the therapeutic effects of exosomes and their positive roles in current treatment strategies for ischemic stroke,including their antiinflammation,anti-apoptosis,autophagy-regulation,angiogenesis,neurogenesis,and glial scar formation reduction ***,it is worth noting that,despite their significant therapeutic potential,there remains a dearth of standardized characterization methods and efficient isolation techniques capable of producing highly purified *** optimization strategies should prioritize the exploration of suitable isolation techniques and the establishment of unified workflows to effectively harness exosomes for diagnostic or therapeutic applications in ischemic ***,our review aims to summarize our understanding of exosome-based treatment prospects in ischemic stroke and foster innovative ideas for the development of exosome-based therapies.

关键词： blood–brain barrier electroacupuncture engineering exercise exosomes ischemic stroke mesenchymal stem cells microglia neuroprotection stents

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激光近净成形SS316/Ni20复合材料的开裂机理

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中国有色金属学报 2017年第12期27卷 2501-2510页

作者：郝云波张国会马广义闫帅牛方勇吴东江大连理工大学精密与特种加工教育部重点实验室大连116024

采用激光近净成形制备梯度材料时异种材料的混合易产生缺陷,严重制约了梯度材料的应用。采用激光近净成形技术制备不同成分比的SS316/Ni20复合材料薄壁结构,并利用OM、SEM、XRD、EDS等检测手段研究不同成分比时复合材料的显微组织、相... 详细信息

采用激光近净成形制备梯度材料时异种材料的混合易产生缺陷,严重制约了梯度材料的应用。采用激光近净成形技术制备不同成分比的SS316/Ni20复合材料薄壁结构,并利用OM、SEM、XRD、EDS等检测手段研究不同成分比时复合材料的显微组织、相组成及元素分布。对裂纹的微观形貌、裂纹断面的元素分布进行分析。结果表明:在给定工艺条件下,SS316质量分数为100%、20%~0时成形件形貌较好,无裂纹缺陷,SS316质量比在90%~30%时成形件发生开裂。裂纹沿晶界扩展,裂纹断面上晶粒清晰可辨,属于热裂纹范畴。成形件开裂主要原因是凝固过程中杂质元素在晶界偏析形成连续的液膜,以及硬质相在晶界上的连续析出,降低晶粒间的结合强度,使其在残余应力作用下产生开裂。

关键词： SS316/Ni20复合材料梯度材料激光近净成形裂纹

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基于回归分析方法下公共交通对经济增长的影响分析

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数学的实践与认识 2017年第5期47卷 25-30页

作者：陈明明周国光马江洪马靖莲陕西科技大学文理学院陕西西安710021 长安大学经济与管理学院陕西西安710064 长安大学理学院陕西西安710064 西安财经学院管理学院陕西西安710100

随着社会经济的发展及人们环保意识的不断增强,公共交通事业的发展及其投资力度不断加大,公共交通在给人们带来方便的同时也在带动着经济的发展.通过扩展的生产函数模型,采用普通最小二乘方法对2003-2012年间的公共交通数据进行估计分析... 详细信息

随着社会经济的发展及人们环保意识的不断增强,公共交通事业的发展及其投资力度不断加大,公共交通在给人们带来方便的同时也在带动着经济的发展.通过扩展的生产函数模型,采用普通最小二乘方法对2003-2012年间的公共交通数据进行估计分析,并找出有异常值的样本点,然后利用稳健MM估计方法进行估计,结果表明公共交通变量对经济的影响具有正相关作用.

关键词：公共交通生产函数 OLS估计 MM估计经济增长

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Constructing Donor–Acceptor‑Linked COFs Electrolytes to Regulate Electron Density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

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Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang ma Conghui Zhang Yongxin Yang Shuyuan Yu Haiye Zhu Yongjiang Sun Hong guo School of materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua Co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

Regulation the electronic density of solid-state electrolyte by donor–acceptor(D–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough D–A-linked covalent organic frameworks(COFs)based on intramolecular charge transfer *** other reported COFbased solid-state electrolyte,the developed concept with D–A-linked COFs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity F-based ligand in COF electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LiFePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding D–A interaction between donor porphyrin and acceptor F atoms,which effectively expedites electron transferring from porphyrin to F-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through D–A system.

关键词： Electronic modulation engineering Donor-acceptor-linked covalent organic frameworks Quasi-solid-state Li metal battery

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Decreased levels of phosphorylated synuclein in plasma are correlated with poststroke cognitive impairment

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Neural Regeneration Research 2025年第9期20卷 2598-2610页

作者： Yi Wang Yuning Li Yakun Gu Wei ma Yuying Guan Mengyuan guo Qianqian Shao Xunming Ji Jia Liu Department of Clinical Laboratory Beijing Bo’ai HospitalChina Rehabilitation Research CenterCapital Medical UniversityBeijingChina Beijing Institute of Brain Disorders Laboratory of Brain DisordersMinistry of Science and TechnologyCollaborative Innovation Center for Brain DisordersBeijing Advanced Innovation Center for Big Data-based Precision MedicineCapital Medical UniversityBeijingChina Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina

Poststro ke cognitive impairment is a major secondary effect of ischemic stroke in many patients;however,few options are available for the early diagnosis and treatment of this *** aims of this study were to(1)determine the specific relationship between hypoxic andα-synuclein during the occur of poststroke cognitive impairment and(2)assess whether the serum phosphorylatedα-synuclein level can be used as a biomarker for poststro ke cognitive *** found that the phosphorylatedα-synuclein level was significantly increased and showed pathological aggregation around the cerebral infa rct area in a mouse model of ischemic *** addition,neuronalα-synuclein phosphorylation and aggregation were observed in the brain tissue of mice subjected to chronic hypoxia,suggesting that hypoxia is the underlying cause ofα-synuclein-mediated pathology in the brains of mice with ischemic *** phosphorylatedα-synuclein levels in patients with ischemic stroke were significantly lower than those in healt hy subjects,and were positively correlated with cognition levels in patients with ischemic ***,a decrease in serum high-density lipoprotein levels in stroke patie nts was significantly correlated with a decrease in phosphorylatedα-synuclein *** ischemic stroke mice did not show significant cognitive impairment or disrupted lipid metabolism 14 days after injury,some of them exhibited decreased cognitive function and reduced phosphorylatedα-synuclein *** together,our results suggest that serum phosphorylatedα-synuclein is a potential biomarker for poststroke cognitive impairment.

关键词： biomarker high-density lipoprotein ischemic stroke phosphorylatedα-synuclein poststroke cognitive impairment

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Advances in Graphene‑Based Electrode for Triboelectric Nanogenerator

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Nano-Micro Letters 2025年第1期17卷 378-403页

作者： Bin Xie Yuanhui guo Yun Chen Hao Zhang Jiawei Xiao maoxiang Hou Huilong Liu Li ma Xin Chen Chingping Wong State Key Laboratory of Precision Electronic manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

With the continuous development of wearable electronics,wireless sensor networks and other micro-electronic devices,there is an increasingly urgent need for miniature,flexible and efficient nanopower generation *** nanogenerator(TENG)technology can convert small mechanical energy into electricity,which is expected to address this *** the core component of TENG,the choice of electrode materials significantly affects its *** metal electrode materials often suffer from problems such as durability,which limits the further application of ***,as a novel electrode material,shows excellent prospects for application in TENG owing to its unique structure and excellent electrical *** review systematically summarizes the recent research progress and application prospects of TENGs based on graphene *** precision processing methods of graphene electrodes are introduced,and the applications of graphene electrode-based TENGs in various scenarios as well as the enhancement of graphene electrodes for TENG performance are *** addition,the future development of graphene electrode-based TENGs is also prospectively discussed,aiming to promote the continuous advancement of graphene electrode-based TENGs.

关键词： Triboelectric nanogenerator Precision processing Graphene electrode Self-powered sensor

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葡聚糖接枝型Protein A介质的层析性能提升

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过程工程学报 2016年第5期16卷 856-861页

作者：朱凯赵岚黄永东李强邱晗王启宝苏志国马光辉中国矿业大学(北京)化学与环境工程学院北京100083 中国科学院过程工程研究所生化工程国家重点实验室北京100190 北京石油化工学院应用化学系北京102617 国家江苏先进生物与化学制造协同创新中心江苏南京210011

Sepharose 4FF微球经环氧活化后与葡聚糖溶液反应,得葡聚糖接枝型琼脂糖微球,再经环氧活化和偶联耐碱型Protein A配基,得葡聚糖接枝型高载量Protein A介质,测定了介质在线清洗稳定性能,并进行了热力学研究.结果表明,与常规Protein A介... 详细信息

Sepharose 4FF微球经环氧活化后与葡聚糖溶液反应,得葡聚糖接枝型琼脂糖微球,再经环氧活化和偶联耐碱型Protein A配基,得葡聚糖接枝型高载量Protein A介质,测定了介质在线清洗稳定性能,并进行了热力学研究.结果表明,与常规Protein A介质相比,葡聚糖接枝型Protein A介质的最高流速提高约32%,对抗体h Ig G的动态载量为60.6 mg/m L,分别为常规介质和mab Select Su Re介质载量的123%和95%;经40次清洗后,葡聚糖接枝型Protein A介质动态载量为原始载量的92%,远高于常规介质的84%,与mab Select Su Re稳定性基本一致.3种介质对抗体的结合均为熵驱动过程,葡聚糖接枝型Protein A介质的吸附热介于mab Select Su Re和常规Protein A介质之间.

关键词：抗体纯化葡聚糖接枝 Protein A层析载量

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