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Influences of Polypropylene Fiber and SBR Polymer Latex on Abrasion Resistance of Cement Mortar

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Journal of Wuhan University of Technology(Materials Science) 2010年第4期25卷 624-627页

作者：徐方 Key Laboratory of Silicate Material Science and Engineering of Ministry of Education Wuhan University of Technology

Influences of polypropylene （PP） fiber and styrene-butadiene rubber （SBR） polymer latex on the strength performance, abrasion resistance of cement mortar were studied. The experimental results show that the flexural strength, brittleness index （σF/σC） and abrasion resistance can be improved significantly by the addition of PP fiber and SBR polymer latex. The relationship between the flexural strength and abrasion resistance was analyzed, showing a good linear relationship between them. The reinforced mechanism of PP fiber and SBR polymer latex on cement mortar was analyzed by some microscopic tests. The test results show that the addition of SBR polymer latex has no significant influence on the cement hydration after 7 d curing. Adding SBR polymer latex into cement mortar can form a polymer transition layer in the interfaces of PP fiber and cement hydrates, which improves the bonding properties between the PP fiber and cement mortar matrix effectively.

关键词： polypropylene fiber SBR polymer latex cement mortar brittleness index abrasion resistance

5-羟基辛烷-4-酮肟对孔雀石的浮选性能及吸附机理

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Transactions of Nonferrous Metals Society of China 2023年第12期33卷 3825-3834页

作者：李方旭林日孝赵刚广东省科学院资源利用与稀土开发研究所广州510650 稀有金属分离与综合利用国家重点实验室广州510650 广东省矿产资源开发与综合利用重点实验室广州510650 中南大学化学化工学院长沙410083

为提高氧化铜资源的利用效率,以丁醛和盐酸羟胺为原料合成新型捕收剂5-羟基辛烷-4-酮肟(HOO)。通过浮选试验、傅里叶红外光谱(FTIR)、X射线光电子能谱(XPS)分析和密度泛函理论(DFT)计算研究其浮选性能和吸附机理。浮选结果表明,与苯羟肟... 详细信息

为提高氧化铜资源的利用效率,以丁醛和盐酸羟胺为原料合成新型捕收剂5-羟基辛烷-4-酮肟(HOO)。通过浮选试验、傅里叶红外光谱(FTIR)、X射线光电子能谱(XPS)分析和密度泛函理论(DFT)计算研究其浮选性能和吸附机理。浮选结果表明,与苯羟肟酸(BHA)相比,HOO具有捕收能力强和用量低的优点。FTIR和XPS的结果清楚地证明了HOO通过C—OH和C=NOH官能团与Cu原子之间键合形成铜-肟配比合物(五元环和六元环螯合物)并吸附在孔雀石表面。此外,DFT结果表明,HOO能通过肟和羟基与铜原子配合形成双齿螯合物。

关键词：浮选吸附酮肟捕收剂氧化铜矿孔雀石

Deciphering the role of mtH2O2 in hepatic ischemia-reperfusion injury mechanisms with low-background super-resolution fluorogenic probe

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Science China Chemistry 2025年第1期68卷 297-307页

作者： Bin fang limin Wang Haoqin li Jiaxin Zhang Yang Ding Pan Pan li Bo Peng Hua Bai lin li Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials &Engineering Northwestern Polytechnical University Institute of Flexible Electronics (IFE Future Technologies) Xiamen University

Hepatic ischemia-reperfusion injury（HIRI） is characterized by mitochondrial dysfunction and oxidative stress. Monitoring mitochondrial hydrogen peroxide（mtH2O2） levels in real-time through super-resolution imaging is crucial for elucidating its distribution in live cells and its mechanism of action during HIRI. However, low-background fluorogenic probes have been overlooked in the context of super-resolution imaging. In this study, we developed a low-background fluorogenic probe（MitoWG） with the potential for super-resolution morphology-correlated mitochondrial identification to track the fluctuates of mtH2O2in HIRI. Activation of the desirable fluorescence properties of the probe by mtH2O2was confirmed using structural illumination microscopy（SIM）, enabling high-quality mitochondrial imaging with exceptional specificity and *** in mtH2O2levels were successfully observed in both cellular and rat models of HIRI. Furthermore, we associated the decline in mitochondrial redox homeostasis with accelerated mtH2O2production during HIRI, which triggered mitophagy deficiency and led to cell death. In conclusion, Mito-WG possesses excellent photophysical and low-background properties for SIM imaging, making it a promising tool for mtH2O2tracking in HIRI research and clinical diagnosis.

关键词： hepatic ischemia-reperfusion injury low-background mtH2O2-activatable super-resolution imaging fluorogenic probe

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危机事件下的生命教育

教学与管理 2020年第17期 6-8页

作者：许利芳许翠芳河北邢台沙河市第六小学北京交通大学马克思主义学院

由新型冠状病毒引起的肺炎因其突发性、传染性和未知性给人们带来普遍的恐慌、焦虑和不安全感,也给人们的生命健康造成威胁。这次危机事件让人们重新反思生命,对学生来说是开展生命教育的良好契机。学校要充分利用这个契机对学生进行认... 详细信息

由新型冠状病毒引起的肺炎因其突发性、传染性和未知性给人们带来普遍的恐慌、焦虑和不安全感,也给人们的生命健康造成威胁。这次危机事件让人们重新反思生命,对学生来说是开展生命教育的良好契机。学校要充分利用这个契机对学生进行认识生命—珍惜生命—发展生命的生命认知教育,在教学实践上通过组建专业的生命教育师资队伍、依托校本专业课程的建设和丰富的生命教育主题活动等途径,让学生充分感受生命的可贵和美好,从而珍惜生命,实现生命价值,获得应对危机事件的经验。

关键词：危机事件生命教育生命认知

Long-term stability and protection efficacy of the RBD-targeting COVID-19 mRNA vaccine in nonhuman primates

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Signal Transduction and Targeted Therapy 2022年第1期7卷 322-330页

作者： Hui Zhao Tie-Cheng Wang Xiao-Feng li Na-Na Zhang liang li Chao Zhou Yong-Qiang Deng Tian-Shu Cao Guan Yang Rui-Ting li\Yi-Jiao Huang Yuan-Guo li Yi-Ming Zhang fang-xu li Yu-Ren Zhou Yu-Hang Jiang Xi-Shan Lu Shi-Hui Sun Meng-li Cheng Kai-Ping Gu Mei Zhang Qing-Qing Ma Xiao Yang Bo Ying Yu-Wei Gao Cheng-Feng Qin State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyAcademy of Military Medical Sciences100071 BeijingChina Key Laboratory of Jilin Province for Zoonosis Prevention and Control Changchun 130122China School of Medicine Tsinghua University100084 BeijingChina State Key Laboratory of Proteomics Beijing Proteome Research CenterNational Center for Protein Sciences(Beijing)Beijing Institute of Lifeomics102206 BeijingChina Shandong Normal University Jinan 250014China Suzhou Abogen Biosciences Suzhou 215123China Research Unit of Discovery and Tracing of Natural Focus Diseases Chinese Academy of Medical Sciences100071 BeijingChina

Messenger RNA(mRNA)vaccine technology has shown its power in preventing the ongoing COVID-19 *** mRNA vaccines targeting the full-length S protein of SARS-CoV-2 have been authorized for emergency ***,we have developed a lipid nanoparticle-encapsulated mRNA(mRNA-LNP)encoding the receptor-binding domain(RBD)of SARS-CoV-2(termed ARCoV),which confers complete protection in mouse ***,we further characterized the protection efficacy of ARCoV in nonhuman primates and the Iong-term stability under normal refrigerator *** immunization of two doses of ARCoV elicited robust neutralizing antibodies as well as cellular response against SARS-CoV-2 in cynomolgus *** importantly,ARCoV vaccination in macaques significantly protected animals from acute lung lesions caused by SARS-CoV-2,and viral replication in lungs and secretion in nasal swabs were completely cleared in all animals immunized with low or high doses of *** evidenee of antibody-dependent enhancement of infection was observed throughout the ***,extensive stability assays showed that ARCoV can be stored at 2-8℃ for at least 6 months without decrease of *** these promising results strongly support the ongoing clinical trial.

关键词： doses stability protected

Effects of Different Surfactant Administrations on Cerebral Autoregulation in Preterm Infants with Respiratory Distress Syndrome

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2016年第6期36卷 801-805页

作者： xu-fang li Ting-ting CHENG Rui-lian GUAN Hong liANG Wei-neng LU Jing-hua ZHANG Mei-yi liU Xin YU Jun liANG li SUN lian ZHANG Department of Neonatology Guangzhou Women and Children k Medical Center Guangzhou 510010 China

To treat respiratory distress syndrome,surfactant is currently delivered via less invasive surfactant administration（liSA） or INtubation SURfactant Extubation（INSURE）.The aim of this study was to compare the effect of the two delivery methods of surfactant on cerebral *** infrared spectroscopy monitoring was carried out to detect cerebral oxygen saturation（Sc O2）,and the mean arterial blood pressure（MABP） was simultaneously *** 44 preterm infants included,the surfactant was administrated to 22 via liSA and 22 via *** clinical characteristics,treatments and outcomes of the infants showed no significant differences between the two *** correlation coefficient of Sc O2 and MABP（rSc O2-MABP） 5 min before administration was similar in the two *** surfactant administration,rSc O2-MABP increased in both groups（0.44±0.10 to 0.54±0.12 in liSA,0.45±0.11 to 0.69±0.09 in INSURE）.In the first and second 5 min after instillation,rSc O2-MABP was not significantly different from baseline in the liSA group,but increased in the first 5 min after instillation（0.59±0.13,P=0.000 compared with the baseline in the same group） and recovered in the second 5 min after instillation（0.48±0.10,P=0.321） in the INSURE *** were significant differences in the change rates of rSc O2-MABP between the two groups during and after surfactant *** results suggest that cerebral autoregulation may be affected transiently by surfactant *** effect duration of liSA is shorter than that of INSURE（〈5 min in liSA vs.5–10 min in INSURE）.

关键词： preterm infant respiratory distress syndrome surfactant cerebral autoreguiation pulmonary surfactant

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凝汽器钛管-板焊接质量问题解析

电焊机 2010年第2期40卷 70-73,127页

作者：徐方利四川电力建设二公司四川成都610051

为了解决凝汽器钛管-板焊接出现的氧化、气孔、裂纹等质量问题,深入分析了钛的物理性能和焊接性,对产生这些质量问题的根本原因和形成机理有了基本认识,掌握了钛的焊接工艺要点;在施工前通过模拟练习获得了合适的焊接工艺参数和缺陷处... 详细信息

为了解决凝汽器钛管-板焊接出现的氧化、气孔、裂纹等质量问题,深入分析了钛的物理性能和焊接性,对产生这些质量问题的根本原因和形成机理有了基本认识,掌握了钛的焊接工艺要点;在施工前通过模拟练习获得了合适的焊接工艺参数和缺陷处理工艺;通过对比试验证明油污是造成众多质量问题的主要原因,说明了焊前清洗的重要性。焊接实践表明,严格的焊前清洗和可靠的氩气保护是获得高质量焊缝的必要条件,选用合适的焊接工艺参数也非常重要。

关键词：钛管-板氧化气孔裂纹清洗

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基于Memetic算法的电路演化设计研究

电子学报 2013年第5期41卷 1036-1040页

作者：莫宏伟徐立芳哈尔滨工程大学自动化学院黑龙江哈尔滨150001 哈尔滨工程大学工程训练中心黑龙江哈尔滨150001

针对传统演化算法在设计数字逻辑电路时存在的演化速度缓慢和容易陷入局部最优解等问题,设计了一种Cartesian进化编程编码的电路演化Memetic算法,采用遗传算法作为全局搜索方法,并设计了适合电路演化的基本门种类局部搜索策略.通过一位... 详细信息

针对传统演化算法在设计数字逻辑电路时存在的演化速度缓慢和容易陷入局部最优解等问题,设计了一种Cartesian进化编程编码的电路演化Memetic算法,采用遗传算法作为全局搜索方法,并设计了适合电路演化的基本门种类局部搜索策略.通过一位全加器电路证明所提出的Memetic硬件演化算法的搜索能力,实验证明所提出的算法能够有效地完成进化任务,具有较强的全局快速和局部搜索能力.

关键词：演化硬件演化算法 Memetic算法局部搜索策略

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T免疫模糊控制在PMSM调速系统的应用

北京邮电大学学报 2014年第6期37卷 34-37页

作者：徐立芳莫宏伟哈尔滨工程大学工程训练中心哈尔滨150001 哈尔滨工程大学自动化学院哈尔滨150001

提出了一种T细胞免疫模糊控制方法.首先利用免疫过程中T细胞浓度调节的原理,在免疫反馈控制数学模型中引入T细胞调节因子,再利用模糊控制器逼近T细胞调节因子表示的非线性函数.该方法与传统比例—积分控制和免疫反馈控制相比,能有效抑... 详细信息

提出了一种T细胞免疫模糊控制方法.首先利用免疫过程中T细胞浓度调节的原理,在免疫反馈控制数学模型中引入T细胞调节因子,再利用模糊控制器逼近T细胞调节因子表示的非线性函数.该方法与传统比例—积分控制和免疫反馈控制相比,能有效抑制负载扰动对电动机转速、电磁转矩输出和电流输出的影响,具备优良的抗系统误差能力和转速跟随能力.永磁同步电动机(PMSM)调速系统的应用结果表明该方法具备一定可行性.

关键词：永磁同步电动机免疫模糊控制免疫反馈控制交流调速系统

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