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用于大尺度模型发动机高频PLIF测量的脉冲串紫外激光系统

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光谱学与光谱分析 2024年第4期44卷 932-936页

作者：曹振于欣彭江波柳强杨顺华张顺平赵延辉李沛霖高龙张善春哈尔滨工业大学可调谐激光技术重点实验室黑龙江哈尔滨150001 哈尔滨工业大学光电子技术研究所黑龙江哈尔滨150001 清华大学精密仪器系北京100084 中国空气动力研究与发展中心四川绵阳621000

针对大尺度模型发动机试验台工作时间短(~百毫秒到秒量级)和激光能量要求高(>1 mJ)的特点,常规的紫外激光系统不能满足发动机燃烧流场精细化测量需求,要求用于高频平面激光诱导荧光(PLIF)测量的紫外激光系统同时满足脉冲串时间间隔短和... 详细信息

针对大尺度模型发动机试验台工作时间短(~百毫秒到秒量级)和激光能量要求高(>1 mJ)的特点,常规的紫外激光系统不能满足发动机燃烧流场精细化测量需求,要求用于高频平面激光诱导荧光(PLIF)测量的紫外激光系统同时满足脉冲串时间间隔短和激光输出能量高,并且系统具有高可靠性和环境适应性。设计了一套用于真实发动机地面试验台高频PLIF测量的脉冲串紫外激光系统,能够获取有效的火焰动力学数据。脉冲串紫外激光系统采用自主研制的脉冲串模式激光器泵浦染料激光器,具备能量监测、波长监测和片光分布监测等功能,可以校正激光参数对测量结果的影响。其中脉冲串模式激光器采用电光调Q、脉冲串模式和MOPA技术,使输出的泵浦激光具有高脉冲能量(~50 mJ@532 nm)、短脉冲宽度(~10.8 ns)和较高的脉冲串频率(20 Hz)。脉冲串紫外激光系统的串时间间隔为50 ms,是国外激光器脉冲串间隔时间的1/200;系统整体转换效率为6%,紫外单脉冲能量为2.95 mJ@283 nm,是国外连续脉冲激光器典型能量值的7倍。为满足发动机地面试验台测量需求,自主集成了工程可用的高可靠性移动式10 kHz PLIF测量系统,具有抗震、防潮和防尘等功能,提升了高频PLIF系统的环境适应能力。国内首次在中国空气动力研究与发展中心的脉冲燃烧风洞上实现了大尺度模型发动机燃烧流场远距离大视场成像测量(~15 cm),获得了高信噪比的氢燃料及乙烯燃料高动态燃烧过程可视化结果。未来可结合光谱图像特征提取与分析方法对其燃烧状态和动态过程开展研究,为发动机复杂流动燃烧机理研究、CFD仿真和发动机设计水平提升提供支撑。

关键词：燃烧诊断脉冲串激光器平面激光诱导荧光大尺度模型发动机

Efficient middlebox scaling for virtualized intrusion prevention systems in software-defined networks

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Science China(Information Sciences) 2022年第8期65卷 279-281页

作者： Junchi xing Chunming WU Haifeng ZHOU Qiumei CHENG Danrui yu Mayra MACAS College of Computer Science Zhejiang University Zhejiang Lab

Dear editor,An intrusion prevention system(IPS) [1] is an important security function that detects and filters out the detected anomaly data traffic in networks. Currently, network function virtualization(NFV) [2] is able to virtualize IPSes as virtualized IPS(VIPS) [3] by encapsulating security functions in software-based middleboxes that can be elastically scaled to deal with traffic volume variations [4, 5].

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A New Microporous Metal-Organic Framework for Highly Selective C2H2/CH4 and C2H2/CO2 Separation at Room Temperature

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Chinese Journal of Chemistry 2017年第8期35卷 1289-1293页

作者： xing Duan Tifeng Xia Zhenguo Ji yuanjing Cui yu Yang Guodong Qian College of Materials & Environmental Engineering Hangzhou Dianzi University Hangzhou Zhejiang 310027 China State Key Laboratory of Silicon Materials Cyrus Tang Center for Sensor Materials andApplieations School of Materials Science & Engineering Zhejiang University Hangzhou Zhejiang 310027 China

We have successfully designed and synthesized a new tetracarboxylic linker, which constructed its first three-dimensional microporous metal-organic framework （MOF）, [Cu2（DDPD）（H2O）2]·Gx （ZJU-13, H4DDPD= 5,5＇-（2,6-dihydroxynaphthalene-1,5-diyl）diisophthalic acid, ZJU=Zhejiang University, G=guest molecules） via solvothermal reaction. Due to open Cu^2＋ sites and optimized pore size, the activated ZJU-13a displays high separation selectivity for CzH2/CH4 of 74 and C2H2/CO2 of 12.5 at low pressure by using Ideal Adsorbed Solution Theory （IAST） simulation at room temperature.

关键词： metal-organic frameworks micro-porous materials selective separation open metal sites optimizedpore size

Spherical Particles Growth with Dynamic Oscillation during Lithium Electrodeposition

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Energy Material Advances 2023年第1期4卷 112-119页

作者： Hanxu Jing hui xing Bohan Li Yongsheng Han MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Northwestern Polytechnical University710129 Xi’anChina Shaanxi Basic Discipline(Liquid Physics)Research Center Northwestern Polytechnical University710129 Xi’anChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of Sciences100190 BeijingChina

In this paper,the spherical particles growth during lithium electrodeposition was investigated by directly solving the governing equations based on the Landau transformation *** basic growth kinetic characteristics of a spherical particle during electrodeposition was *** results show that the dynamic oscillation of the growth velocity occurs during the spherical particle *** was found from numerical simulations that applied electrical potential difference,electrolyte concentration,and diffusion coefficient are 3 main factors influencing the spherical growth and the existence of the dynamic oscillation state of the growth velocity during *** increase in both the applied electrical potential difference and the electrolyte concentration can lead to the increase of the growth velocity of the spherical particle,while the growth velocity is independent of the diffusion ***,it was found that the wavelength and the amplitude of the dynamic oscillation of the growth velocity can be influenced by the applied electrical potential difference,the electrolyte concentration,and the diffusion *** determined that the dynamic competition between electrochemical reactions and ion transport in the electrodeposition is the reason for the existence of the oscillation of the growth velocity.

关键词： coefficient. method. oscillation

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超亲水柔性导电碳膜的制备及其油水分离性能

水处理技术 2024年第9期50卷 65-69页

作者：王颖楠郁金星刘克成范辉魏伟吴静国网河北省电力有限公司电力科学研究院河北石家庄050022 国网河北省电力有限公司河北石家庄050023 天津伊唯信科技有限公司天津300392

膜技术因分离效率高,占地小、易操作等特点被广泛应用于含油废水处理。但油类的疏水性特征导致膜污染问题在含油废水处理过程中更加突出,膜通量衰减明显,严重影响了膜系统连续运行的稳定性。实验通过向聚丙烯腈纺丝液中添加醋酸锌和三... 详细信息

膜技术因分离效率高,占地小、易操作等特点被广泛应用于含油废水处理。但油类的疏水性特征导致膜污染问题在含油废水处理过程中更加突出,膜通量衰减明显,严重影响了膜系统连续运行的稳定性。实验通过向聚丙烯腈纺丝液中添加醋酸锌和三乙氧基-1H,1H,2H,2H-十三氟-N-辛基硅烷提高碳化膜的亲水性和机械性能,制备出高导电、超亲水的柔性碳化膜。在-50 V/cm电压下,碳化膜做阴极,油水分离效率始终保持在99.97%左右。膜通量较不加电时提高了1.2倍,连续10个过滤周期后膜比通量仅衰减了5.2%,表现出卓越的油水分离性能和优异的稳定性。

关键词：导电膜油水分离纳米纤维碳化膜超亲水静电纺

3-甲基腺嘌呤对转化生长因子-β诱导大鼠肝脏星形细胞株HSC-T6活化及自噬的影响观察

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山东医药 2024年第9期64卷 29-32页

作者：惠瑜安红梅窦岚曹可新疆第二医学院公共卫生学院预防医学教研室新疆克拉玛依834000

目的观察3-甲基腺嘌呤(3-MA)对转化生长因子-β(TGF-β)诱导的大鼠肝星形细胞株HSC-T6活化及自噬的影响。方法取对数生长期的HSC-T6细胞分为空白组、TGF-β+PBS组、TGF-β+3-MA组。TGF-β+3-MA组细胞加入浓度为2 ng/mL TGF-β培养72 h... 详细信息

目的观察3-甲基腺嘌呤(3-MA)对转化生长因子-β(TGF-β)诱导的大鼠肝星形细胞株HSC-T6活化及自噬的影响。方法取对数生长期的HSC-T6细胞分为空白组、TGF-β+PBS组、TGF-β+3-MA组。TGF-β+3-MA组细胞加入浓度为2 ng/mL TGF-β培养72 h后加入3-MA(0.5 mg/mL)处理24 h,TGF-β+PBS组细胞加入浓度为2 ng/mL TGF-β培养72 h后加入等量PBS处理24 h,空白组加入等量PBS处理,采用实时荧光定量PCR法检测各组细胞活化标志物α-SMA、TGF-βmRNA和自噬标志物LC3、Beclin-1、Atg5 mRNA,采用Western blotting法检测各组细胞活化标志物α-SMA、TGF-β蛋白和自噬标志物LC3、Beclin-1、Atg5蛋白。结果TGF-β+PBS组、TGF-β+3-MA组细胞活化标志物α-SMA、TGF-βmRNA和蛋白均高于空白组,且TGF-β+3-MA组均低于TGF-β+PBS组(P均<0.05)。TGF-β+PBS组、TGF-β+3-MA组细胞自噬标志物LC3、Beclin-1、Atg5 mRNA和蛋白均高于空白组,且TGF-β+3-MA组均低于TGF-β+PBS组(P均<0.05)。结论3-MA可抑制TGF-β诱导的大鼠肝星形细胞株HSC-T6活化及自噬。

关键词： 3-甲基腺嘌呤肝脏星形细胞株 HSC-T6细胞细胞活化转化生长因子-β 细胞自噬肝纤维化

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Role of exosomes in metastasis and therapeutic resistance in esophageal cancer

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World Journal of Gastroenterology 2023年第42期29卷 5699-5715页

作者： xing-yu Ning Jin-Hu Ma Wei He Jun-Ting Ma The Second School of Clinical Medicine Anhui Medical UniversityHefei 230032Anhui ProvinceChina School of Basic Medical Sciences Anhui Medical UniversityHefei 230032Anhui ProvinceChina

Esophageal cancer(EC)has a high incidence and mortality rate and is emerging as one of the most common health problems *** to the lack of sensitive detection methods,uncontrollable rapid metastasis,and pervasive treatment resistance,EC is often diagnosed in advanced stages and is susceptible to local *** are important components of intercellular communication and the exosome-mediated crosstalk between the cancer and surrounding cells within the tumor microenvironment plays a crucial role in the metastasis,progression,and therapeutic resistance of *** the critical role of exosomes in tumor pathogenesis,this review focused on elucidating the impact of exosomes on EC metastasis and therapeutic ***,we summarized the relevant signaling pathways involved in these *** addition,we discussed the potential clinical applications of exosomes for the early diagnosis,prognosis,and treatment of EC.

关键词： Exosomes Esophageal cancer Tumor microenvironment Metastasis Signaling pathway Therapeutic resistance

Experimental Study on Sloshing Characteristics in the Elastic Tank Based on Morlet Wavelet Transform

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China Ocean Engineering 2018年第4期32卷 400-412页

作者： JIANG Mei-rong ZHONG Wen-jun yu Jian-xing LIU Pei-lin YIN Han-jun WANG Shou-dong MA yu-xiang State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Offshore Oil Engineering Co. Ltd.CNOOCTianjin 300451China CNOOC Research Institute Co. Ltd.CNOOCBeijing 100028China Transport Planning and Research Institute Ministry of TransportBeijing 100028China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

Hydroelastic effect of sloshing is studied through an experimental investigation. Different excitation frequencies are considered with low-fill-depth and large amplitude. Morlet wavelet transform is introduced to analyze the free surface elevations and sloshing pressures. It focuses on variations and distributions of the wavelet energy in elastic tanks. The evolutions of theoretical and experimental wavelet spectra are discussed and the corresponding Fourier spectrums are compared. Afterwards, average values of the wavelet spectra are extracted to do a quantitative study at various points. From the wavelet analysis, sloshing energies are mainly distributed around the external excitation frequency and expanded to high frequencies under violent condition. In resonance, experimental wavelet energy of the elevation in elastic tanks is obviously less than that in the rigid one; for sloshing pressures, the elastic wavelet energy close to the rigid one and conspicuous impulse is observed. It recommends engineers to concern the primary natural frequency and impulsive peak pressures.

关键词： sloshing elastic tank wavelet transform free surface elevation pressure

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激光选区熔化技术应用于义齿的研究进展

中国医疗器械信息 2024年第13期30卷 73-75页

作者：吴猛于琦夏慧敏戴清江苏省药品监督管理局审评中心江苏南京210000

简要介绍了激光选区熔化技术制备义齿类材料以及在义齿产品中的应用,其凭借个性化定制、高精度成形、以及优异的理化性能等优势,在增材制造领域中占据着重要的地位,特别是在定制式义齿产品制造中显示出巨大的潜力和价值。

关键词：激光选区熔化技术义齿材料定制式义齿