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South China Journal of Cardiology 2024年第1期25卷 1-10页

作者：程诗尧刘安邦孔博马欢刘全俊姜成尹晗郭兰耿庆山 Department of Cardiology Guangdong Provincial Peo-ple’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical University Guangzhou 510080China

Background The relationship between estimated glomerular filtration rate(e GFR)and depression in patients with coronary artery disease(CAD)remained *** A total of 561 patients with CAD were selected from Department of Cardiology between October 2017 and February 2018 while their depression status was evaluated by Patient Health Questionnaire-9(PHQ-9).The e GFR levels were compared between patients with and without depression and the link between e GFR and depression in CAD patients was *** Among 561CAD patients,63 patients(11.23%)were diagnosed with comorbid depression(PHQ-9≥10).The depression group presented significantly lower e GFR level than the non-depression *** fully-adjusted multivariate analysis,higher e GFR level was proved to be a protective factor for depression in CAD patients,reducing a 22%risk of depression for every 10 m L/(min·1.73 m2)increase of e GFR level(OR:0.78,95%CI:0.66-0.93).Similar results were found in the stratified analyses of both e GFR quartiles and chronic kidney disease(CKD)stages(P for trend0.05).A negative linear association was estimated between e GFR level and depression in CAD *** Our results suggested lower e GFR level in CAD patients with comorbid depression,displaying a negative linear correlation between e GFR and risk of depression in CAD *** findings implied that screening depression in CAD patients with decreased e GFR level or concomitant CKD should be highlighted in clinical practice.[S Chin J Cardiol 2024;25(1):1-10]

关键词： Estimated glomerular filtration rate Chronic kidney disease Depression Coronary artery disease Comorbidity

Anomalous Dimension in the Solution of a Nonlinear Diffusion Equation

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Communications in Theoretical Physics 2001年第11期36卷 617-619页

作者： TU Tao cheng geng LIU Jian-Wei Laboratory of Quantum Communication and Computation University of Science and Technology of ChinaHefei 230026China Department of Astronomy and Applied PhysicsUniversity of Science and Technology of ChinaHefei 230026China CCAST (World Laboratory) P.O.Box 8730Beijing 100080China Institute of Theoretical Physics Academia SinicaP.O.Box 2735Beijing 100080China Department of Astronomy and Applied PhysicsUniversity of Science and Technology of ChinaHefei 230026China

A new method is used to obtain the anomalous dimension in the solution of the nonlinear diffusion *** result is the same as that in the renormalization group (RG) *** gives us an insight into the anomalous dimension in the solution of the nonlinear diffusion equation in the RG *** on this discussion,we can see anomalous dimension appears naturally in this system.

关键词： renormalization group,asymptotic analysis,nonlinear diffusion equation

NHRPA:a novel hierarchical routing protocol algorithm for wireless sensor networks

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The Journal of China Universities of Posts and Telecommunications 2008年第3期15卷 75-81页

作者： cheng Hong-bing YANG geng HU Su-jun College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Department of Information Engineering College of Jiangsu Civil Vocation Nanjing 210036 China

Considering severe resources constraints and security threat hierarchical routing protocol algorithm. The proposed routing of wireless sensor networks （WSN）, the article proposed a novel protocol algorithm can adopt suitable routing technology for the nodes according to the distance of nodes to the base station, density of nodes distribution, and residual energy of nodes. Comparing the proposed routing protocol algorithm with simple direction diffusion routing technology, cluster-based routing mechanisms, and simple hierarchical routing protocol algorithm through comprehensive analysis and simulation in terms of the energy usage, packet latency, and security in the presence of node protocol algorithm is more efficient for wireless sensor networks. compromise attacks, the results show that the proposed routing

关键词： wireless sensor networks (WSN) routing protocol network security

液液萃取/气相色谱-质谱法结合自动解卷积-Kováts保留指数法定性分析电子烟液中的挥发性成分

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分析测试学报 2024年第3期43卷 382-392页

作者：史洪飞徐伯芃徐成鑫权养科周修齐应耿迪南京警察学院刑事科学技术学院江苏南京210023 公安部鉴定中心北京100038 南京市烟草公司六合分公司江苏南京211500

基于液液萃取/气相色谱-质谱法结合自动解卷积-Kováts保留指数法,建立了电子烟液中挥发性成分的检测方法。对提取溶剂种类进行了优化,并依据烟液中香气成分的香气特征,分析果味和烟草味烟液的香韵构成和差异,确定不同果味烟液的特征香... 详细信息

基于液液萃取/气相色谱-质谱法结合自动解卷积-Kováts保留指数法,建立了电子烟液中挥发性成分的检测方法。对提取溶剂种类进行了优化,并依据烟液中香气成分的香气特征,分析果味和烟草味烟液的香韵构成和差异,确定不同果味烟液的特征香气成分。结果表明:①以乙醚为提取溶剂能减弱丙三醇对其他组分识别的干扰。②自动解卷积法能准确识别共流出组分和低含量组分;Kováts保留指数法提升了化合物识别的准确度。③在10种烟草味烟液中检出15种成分,以豆香、焦香香韵化合物为主;在21种果味烟液中检出80种成分,以果香、花香香韵化合物为主,确定了16类果味烟液的特征香气成分。通过随机验证实验,该方法可有效分辨不同果味类型的果味烟液和烟草味烟液。该方法样品用量少、前处理过程简单、样品分析用时短,能满足烟液中香气成分的检测需要,可为果味电子烟液的检验识别和监管提供参考。

关键词：液液萃取气相色谱-质谱法自动解卷积-Kováts保留指数法电子烟液特征香气成分

Guest selectivity in the supramolecular host networks fabricated by van der Waals force and hydrogen bond

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Nano Research 2019年第3期12卷 537-542页

作者： xuan Peng Yanfang geng Min Zhang Faliang cheng Linxiu cheng Ke Deng Qingdao Zeng CAS Key Laboratory of Standardization and Measurement far Nanotechnology CAS Center for Excellence in Nanoscience National Center far Nanoscience and Technology (NCNST) No. 11 ZhongguancunBeiyitiao Beijing 100190 China Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil Engineering Dongguan University of Technology Dongguan 523808 China Center of Materials Science and Optoelectonics Engineering University of Chinese Academy of Sciences Beijing 100049 China

Here, the structural transformations of H4ETTC induced by coronene (COR) and selective adsorption behaviors of COR in different templates were investigated by seanning tunnelling microscope (STM). It was discovered that the assembled architecture of H4ETTC at the HOPG/ heptanoic acid interface depended on the concentration of COR, and the clusters of COR were obtained in the kagome nanoporous network of H4ETTC molecules at a high concentration of COR solution. In addition, COR clusters can also be formed in the hexagonal porous structure of hexaphenylbenzene (HPB) molecules modified by alkyl chains at the HOPG/heptanoic acid interface. When both H4ETTC and HPB assembly structures, based on hydrogen bonding and van der Waals force respectively, were selected as the host templates, COR showed selectivity for HPB template to form HPB/COR hexagonal host-guest architecture. Density functional theory (DFT) calculations were also performed to disclose the mechanisms involved.

关键词： selective adsorption COR host-guest architecture

Simultaneous Improvements of Thermal Stability and Mechanical Properties of Poly(propylene carbonate) via Incorporation of Environmental-friendly Polydopamine

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Chinese Journal of Polymer Science 2014年第12期32卷 1724-1736页

作者： Yu-han Li Mi Zhou cheng-zhen geng 陈枫傅强 College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University

Inspired by the photoprotection, radical scavenging of melanin together with versatile adhesive ability of mussel proteins, polydopamine（PDA） nanoparticles were successfully prepared and incorporated into environmentally friendly polymer, poly（propylene carbonate）（PPC） via solvent blending. The prepared composites exhibited excellent thermal stability in air and nitrogen atmosphere and extraordinary mechanical properties. The composites displayed eminent increase of temperature at 5% weight loss（T5%） by 30-100 K with 0.3 wt%-2.0 wt% loadings, meanwhile, the tensile strength and Young＇s modulus were significantly improved from 11.5 MPa and 553.7 MPa to 40.5 MPa and 2411.2 MPa, respectively. The kinetic calculation indicated that improvement of T5% is presumably derived from suppressing chain-end unzipping. The glass transition temperature（Tg） of the PPC/PDA composites increased by 8-10 K. This is probably due to hydrogen bonding interaction since the abundant proton donors along PDA chains would interact with proton acceptors like C = O and C―O―C in PPC which would cause restriction of segmental motion of PPC chains.

关键词： Biodegradable polymers Reinforcements Mechanical properties Thermal properties Free radical scavenging

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关键生产工艺对鲜榨生菜汁品质的影响

食品工业科技 2024年第1期45卷 46-53页

作者：张佳迪程锦潇李华林李芝萱唐选明耿新丽潘艳芳中国农业科学院农产品加工研究所北京100193 天津科技大学食品科学与工程学院天津300457 新疆维吾尔自治区葡萄瓜果研究所新疆吐鲁番838200

本研究以水培绿萝莎生菜为原料,研究漂烫(95℃/2 min)、分离(6000×g/10 min)、杀菌(600 MPa,25℃/2 min)三个关键生产工艺对鲜榨生菜汁微生物、色泽参数、理化指标、酶活性及抗氧化能力的影响。结果表明,经杀菌工艺后鲜榨生菜汁总好氧... 详细信息

本研究以水培绿萝莎生菜为原料,研究漂烫(95℃/2 min)、分离(6000×g/10 min)、杀菌(600 MPa,25℃/2 min)三个关键生产工艺对鲜榨生菜汁微生物、色泽参数、理化指标、酶活性及抗氧化能力的影响。结果表明,经杀菌工艺后鲜榨生菜汁总好氧菌小于2 lgCFU/mL,霉菌和酵母菌小于1.3 lgCFU/mL,均在国标(GB7101-2015)限量范围内。分离工艺显著影响生菜汁色泽和叶绿素含量,鲜榨清汁的L^(*)、a^(*)、b^(*)和C^(*)值均显著升高(P<0.05),清汁更加明亮、绿色变浅、黄色加深、饱和度升高,总叶绿素含量下降了56.44%。漂烫后鲜榨生菜汁a^(*)值显著降低(P<0.05),绿色更加明亮,漂烫浊汁的多酚氧化酶、过氧化物酶和过氧化氢酶失活率分别为83.76%、84.87%和90.80%。漂烫和杀菌均影响鲜榨生菜汁的活性成分和抗氧化能力,可溶性糖含量保留率分别为91.24%和88.3%,可溶性蛋白的保留率为64.22%和60.60%,总酚含量分别损失了53.31%和56.28%,抗氧化能力降低了82.61%和73.91%。本研究可为鲜榨蔬菜汁加工提供技术参考。

关键词：鲜榨生菜汁品质漂烫超高压杀菌分离

浅谈A3管理方法在质量管理体系改进中的应用

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质量与可靠性 2024年第3期 30-34页

作者：王晓磊金诚耿卫国北京航天试验技术研究所北京100074

将A3管理方法运用在质量管理体系改进过程中,聚焦研究现状,深挖问题根源,考虑更多的解决对策。然后制定实施计划,稳步推进,强化工作闭环管理,助推研究所质量保证能力持续提升和科研生产模式优化升级。

关键词： A3管理方法质量管理体系改进

基于气-固两相流喷嘴实验的20G钢冲蚀机理研究

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表面技术 2024年第17期53卷 50-61页

作者：邓宽海程金亮林元华黄耕刘冰梅宗斌秦大伟西南石油大学油气藏地质及开发工程国家重点实验室成都610500 贵州航天天马机电科技有限公司贵州遵义563000 四川华宇钻采装备有限公司四川泸州646000 广东石油化工学院广东茂名525000

目的由天然气管道内壁减薄及穿孔导致的天然气泄漏事故频繁发生,输气管道面临着日益严重的冲蚀磨损问题。针对这一问题需要明确输气管道材料的冲蚀行为及机理,为抗冲蚀材料设计和延长管道使用寿命等工作的开展提供有效支撑。方法基于AST... 详细信息

目的由天然气管道内壁减薄及穿孔导致的天然气泄漏事故频繁发生,输气管道面临着日益严重的冲蚀磨损问题。针对这一问题需要明确输气管道材料的冲蚀行为及机理,为抗冲蚀材料设计和延长管道使用寿命等工作的开展提供有效支撑。方法基于ASTM-G76测试标准,采取气-固喷嘴冲蚀试验研究方法,利用空气射流冲蚀实验机,开展不同冲击角度和冲击速度下天然气管道材料20G钢的气-固冲蚀实验;采用扫描电子显微镜、激光粒度分析仪等设备分析试样表面冲蚀形貌及特征;采用Ahlert冲蚀模型对实验数据进行拟合,建立20G钢的冲蚀率方程。结果当冲击速度(15~72 m/s)增大时,冲蚀率随之增大。当冲击角度(15°~90°)增加时,冲蚀率随之减小。冲蚀面积随着冲击角度的增加而减小。在低冲击角度下(15°、30°),固相颗粒的“犁削”为主要冲蚀及材料移除机制。在中等冲击角度下(45°、60°),冲蚀机制呈现混合形式,犁削、压实与开裂共同作用于材料表面。在高冲击角度下(75°、90°),以压实和开裂为主要冲蚀及材料移除机制。结论在气固两相流作用下,20G钢的冲蚀磨损过程符合典型的塑性材料冲蚀规律。颗粒冲击速度不会直接影响冲蚀机制,颗粒冲击能量的变化是影响冲蚀率的主要因素。建立了适用于天然气管道材料抗冲蚀性能对比和CFD冲蚀模型的冲蚀速率方程。

关键词：冲蚀磨损 20G钢冲蚀机理气固两相流冲蚀速率方程冲蚀试验

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辣椒种质资源炭疽病抗性鉴定与遗传分析

中国蔬菜 2024年第5期 59-68页

作者：郑婉婉赵建荣程春园洪成耿三省陈斌杜和山张晓芬安徽科技学院安徽滁州233100 北京市农林科学院蔬菜研究所蔬菜生物育种全国重点实验室蔬菜种质改良北京市重点实验室华北地区园艺作物生物学与种质创制重点实验室国家蔬菜工程技术研究中心北京100097

辣椒是我国重要的蔬菜作物兼经济作物。炭疽病严重危害辣椒生产,选育抗病品种是最根本有效的防治措施。本研究利用18份干椒用辣椒自交系材料,选用红熟期果实,对5种辣椒炭疽病病原菌进行致病性鉴定,筛选出强致病菌株,并应用其对529份辣... 详细信息

辣椒是我国重要的蔬菜作物兼经济作物。炭疽病严重危害辣椒生产,选育抗病品种是最根本有效的防治措施。本研究利用18份干椒用辣椒自交系材料,选用红熟期果实,对5种辣椒炭疽病病原菌进行致病性鉴定,筛选出强致病菌株,并应用其对529份辣椒材料进行了炭疽病人工接种抗性鉴定。结果显示,402份干椒用辣椒自交系材料中,1份表现为免疫,1份表现为高抗,29份表现为抗病,62份表现为耐病,其余309份均表现为感病;127份干椒用杂交组合材料中,3份表现为免疫,1份表现为高抗,23份表现为抗病,24份表现为耐病,其余76份均表现为感病。利用炭疽病抗性差异显著双亲构建的重组自交系群体,采用植物数量性状主基因-多基因遗传分析方法,对辣椒炭疽病抗性进行了遗传分析,结果显示多基因加性上位性遗传模型为最优模型。

关键词：辣椒炭疽病抗性鉴定遗传分析