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Journal of Ocean University of China 2011年第4期10卷 425-432页

作者： PAN Luqing LIU huijie yu Jinhong Department of Aquaculture the Key Laboratory of MaricultureMinistry of EducationOcean University of ChinaQingdao 266003P.R.China

Hemocyte counts and phenoloxidase(PO)activity were examined after hemolymph being incubated in dopamine(DA),noradrenaline(NE)and serotonin(5-HT).Results showed that all the three biogenic amines(BAs)had a significant impact on total hemocyte count(THC),differential hemocyte count(DHC),and intracelluar and extracelluar phenoloxidase(PO)*** these Bas,DA had the strongest effect on the above parameters,whereas 5-HT had the least *** with D1 receptor antagonist SCH23390,D2 receptor antagonist Sulpiride and 1:1 admixture of the two could significantly inhibit the effect of DA on these ***23390 showed a stronger inhibitory effect than Sulpiride,and the admixture exhibited the strongest *** results suggested that the change of hemocyte count and activation of prophenoloxidase(proPO)system in Litopenaeusvan-namei hemocyte can be regulated by BAs,and DA modulates the two parameters via its receptors.

关键词： biogenic amine dopamine receptor hemocyte Litopenaeus vannamei prophenoloxidase system

The application of Melissa officinalis *** oil nanoemulsions protects sea bass(Lateolabrax japonicus)against myofibrillar protein and lipid oxidation during refrigeration

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Food Quality and Safety 2023年第3期7卷 447-455页

作者： Yao Xie huijie yu Xin Zhao Chuhan Bian Hao Cheng Jun Mei Jing Xie College of Food Science&Technology Shanghai Ocean UniversityShanghaiChina Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation Shanghai Ocean UniversityShanghaiChina National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean UniversityShanghaiChina Shanghai Engineering Research Center of Aquatic Product Processing&Preservation Shanghai Ocean UniversityShanghaiChina

Objectives:The nutrient rich sea bass is prone to oxidation of lipid and protein during *** and Methods:The research was to investigate the effect of different concentrations of Melissa officinalis *** oil(MOEO)nanoemulsions on myofibrillar protein(MP)and lipid oxidation in sea bass(Lateolabrax japonicus)during refrigeration at 4°***:The results of thiobarbituric acid reactive substances and mitochondrial membrane potential showed that carboxymethyl chitosan/locust bean gum active coating solutions incorporating 2%MOEO nanoemulsions(C/L-2M)was the most effective in inhibiting lipid oxidation that occurred in sea bass under attack by reactive oxygen ***-field nuclear magnetic resonance results showed that C/L-2M maximally slowed the conversion of bound water to free water during *** oxidation of lipids and MP disrupted the secondary and tertiary conformations of MP and accelerated protein aggregation and ***:C/L-2M slowed the oxidation of lipids and proteins by inhibiting the oxidation of reactive oxygen species.C/L-2M is a very promising preservative emulsion for the preservation of sea bass.

关键词： Lateolabrax japonicus Melissa officinalis L.essential oil lipid oxidation protein oxidation active coating solutions

A human-sensitive frequency band vibration isolator for heavy-duty truck seats

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Applied Mathematics and Mechanics(English Edition) 2024年第10期45卷 1733-1748页

作者： Qingqing LIU Shenlong WANG Ge YAN Hu DING Haihua WANG Qiang SHI Xiaohong DING huijie yu School of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Frontier Science Center of MechnoinformaticsShanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China Yanfeng Adient Seating Co. Ltd.Shanghai 201315China College of Mechanical and Electrical Engineering Jiaxing Nanhu UniversityJiaxing 314001Zhejiang ProvinceChina

In this study,a human-sensitive frequency band vibration isolator(HFBVI)with quasi-zero stiffness(QZS)characteristics for heavy-duty truck seats is designed to improve the comfort of heavy-duty truck drivers on uneven ***,the analytical expressions for the force and displacement of the HFBVI are derived with the Lagrange equation and d'Alembert's principle,and are validated through the prototype restoring force ***,the harmonic balance method(HBM)is used to obtain the dynamic responses under harmonic excitation,and further the influence of pre-stretching on the dynamic characteristics and transmissibility is ***,the experimental prototype of the HFBVI is fabricated,and vibration experiments are conducted under harmonic excitation to verify the vibration isolation performance(VIP)of the proposed vibration *** experimental results indicate that the HFBVI can effectively suppress the frequency band(4-8 Hz)to which the human body is sensitive to vertical *** addition,under real random road spectrum excitation,the HFBVI can achieve low-frequency vibration isolation close to 2 Hz,providing new prospects for ensuring the health of heavy-duty truck drivers.

关键词： human-sensitive frequency band quasi-zero stiffness(QZS) heavy-duty truck seat real random road spectrum low-frequency vibration isolation

The impact of X-rays on the expressions of miR-130a/miR-25 and its potential role in the enhanced metastasis of A549 cell lines in vitro induced by X-rays

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Science China(Technological Sciences) 2013年第9期56卷 2243-2249页

作者： LV Jin WANG SiNian SONG XiuJun LI Xiao HE Rui yu huijie CHEN Shu WANG Lei JIANG QiSheng The Second Artillery General Hospital PLA

We aimed to investigate the impact of X-rays on miR-130a and miR-25 expressions of A549 cell lines and to understand the mechanism of miR-130a and miR-25 on the regulation of invasion and metastasis of A549 cell lines. Human adenocarcinoma cells of the line A549 were cultured and radiated by X-rays at the absorbed doses of 2 and 4, respectively by linear accelerator. Transwell invasion and migration assay were employed to exam the metastasis ability of A549 cells post X-rays irradiation. Both the miRNA and mRNA were extracted from A549 cells at different time points post radiation. The expressions of miR-130a and miR-25, as well as the expressions of VEGF and CCR-7 mRNAs, were detected in A549 cells with 2 and 4 Gy X-rays radiation, respectively by real time PCR. Results were statistically analyzed by SAS 8.2 software, which showed that the invasiveness of A549 cells post 2 and 4 Gy X-rays increased significantly compared with that of untreated A549 cells (the migration cell numbers are 20, 48 and 62 in Group 0, 2 and 4 Gy X-rays, respectively). Furthermore, the expressions of miR-130a and miR-25 also increased significantly at the time-points of 1, 2, 4, and 8 h post radiation, and began to decrease to the control level at 12 h post radiation. VEGF and CCR-7 mRNAs were detected to be up-regulated 18 h post radiation and remained at a high level till 72 h post radiation. The expression of VEGF mRNA has a close correlation with that of CCR-7 mRNA, and the expression of miR-130a also has a correlation with that of VEGF and CCR-7mRNAs. It is concluded that the metastasis of A549 cells in vitro could be promoted by X-rays, and miR-130a might play a role in the metastasis of A549 cells via regulating the expressions of VEGF and CCR-7 mRNAs.

关键词： radiation lung cancer microRNA metastasis

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非线性干摩擦系统冲击响应的求解方法

振动与冲击 2020年第21期39卷 111-115页

作者：余慧杰王文倩常维上海理工大学机械工程学院上海200093

在非线性干摩擦系统动力学模型的基础上,结合金属摩擦片的强几何非线性力学特性,利用分段杜哈梅积分的方法推导了干摩擦隔振器在较大冲击载荷下的加速度响应计算公式,将理论计算结果与摆锤模拟大冲击的试验结果作对比发现,该方法能够较... 详细信息

在非线性干摩擦系统动力学模型的基础上,结合金属摩擦片的强几何非线性力学特性,利用分段杜哈梅积分的方法推导了干摩擦隔振器在较大冲击载荷下的加速度响应计算公式,将理论计算结果与摆锤模拟大冲击的试验结果作对比发现,该方法能够较好地反映金属干摩擦隔振器在较大冲击下的运动规律。

关键词：非线性干摩擦隔振器分段杜哈梅积分

Effect of gum tragacanth-sodium alginate coatings incorporated with epigallocatechin gallate on the quality and shelf life of large yellow croaker(Larimichthys crocea)during superchilling storage

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Food Quality and Safety 2024年第3期8卷 577-588页

作者： Zhilong Xu Juxin Pei Jun Mei huijie yu Siyuan Chu Jing Xie College of Food Science and Technology Shanghai Ocean UniversityShanghaiChina National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean UniversityShanghaiChina Shanghai Engineering Research Center of Aquatic Product Processing and Preservation ShanghaiChina Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation ShanghaiChina

The effect of gum tragacanth(GT)and sodium alginate(SA)active coatings incorporated with epigallocatechin gallate(EGCG;0.16%,0.32%,and 0.64%,respectively)on the quality of large yellow croaker fillets was evaluated during superchilling storage at–3˚C for 42 *** results revealed that the GT-SA-EGCG active coatings delayed microbial spoilage by reducing the total viable counts of Pseudomonas *** psychrophile bacteria and retarded the degradation of the physical properties of water-holding capacity,cooking loss,color,odor and ***-SA-EGCG coatings could also maintain fillet freshness by maintaining lower total volatile basic nitrogen,K value,and histidine content,inhibiting myofibrillar protein degradation during superchilling *** results suggested that the active coatings embedded with GT-SA-EGCG could be used as a preservative to enhance the quality of large yellow croaker and prolong the shelf life by 7–14 d during superchilling storage at–3˚C.

关键词： Large yellow croaker epigallocatechin gallate active coatings superchilling quality

基于迟滞回线模型的非线性金属橡胶传递率分析

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振动与冲击 2020年第6期39卷 230-235,256页

作者：余慧杰朱逸轩许亚辉上海理工大学机械工程学院上海200093

通过理论和试验对某金属橡胶非线性隔振器的传递特性进行了研究。基于含干摩擦阻尼的非线性迟滞力学模型,采用平均法求出系统的频率响应函数,从理论角度探究不同运动状态下的传递率及实现无谐振的条件;根据频率响应函数确定解锁频率与... 详细信息

通过理论和试验对某金属橡胶非线性隔振器的传递特性进行了研究。基于含干摩擦阻尼的非线性迟滞力学模型,采用平均法求出系统的频率响应函数,从理论角度探究不同运动状态下的传递率及实现无谐振的条件;根据频率响应函数确定解锁频率与实现无谐振的临界干摩擦力;利用动态加载试验识别隔振器的力学参数,通过振动实验验证了理论结果。所得结论对金属橡胶隔振器的设计和应用具有重要的指导意义。

关键词：金属橡胶迟滞回线干摩擦阻尼传递率

一种双连杆-弹簧-曲面机构的QZS隔振器设计和研究

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振动与冲击 2021年第11期40卷 220-229页

作者：王志成王神龙余慧杰上海理工大学机械工程学院上海200093

基于正负刚度并联原理,运用双连杆-弹簧-曲面作为负刚度机构、竖直弹簧作为正刚度机构,提出了一种准零刚度(quasi-zero stiffness,QZS)隔振器的新构型。针对上述构型,通过静力分析,研究了系统的位移-刚度特性和位移-回复力特性,得到了... 详细信息

基于正负刚度并联原理,运用双连杆-弹簧-曲面作为负刚度机构、竖直弹簧作为正刚度机构,提出了一种准零刚度(quasi-zero stiffness,QZS)隔振器的新构型。针对上述构型,通过静力分析,研究了系统的位移-刚度特性和位移-回复力特性,得到了系统静平衡下的QZS条件。此外,建立QZS系统的非线性动力学方程,应用谐波平衡法和龙格库塔法求解。针对不同的激励幅值、阻尼系数和QZS参数等因素,研究了系统动力学响应和传递率特性。理论研究表明,该QZS构型可以有效降低模型的共振频率与最大传递率幅值。基于隔振器的三维模型进行数值仿真和实验研究,发现提出的QZS构型拥有较好的低频隔振性能,并具备与线性系统相当的高频隔振性能。

关键词：双连杆-弹簧-曲面机构准零刚度(QZS) 谐波平衡法龙格库塔法传递率

交通基础设施与中国多产品企业出口产品组合调整——基于中欧班列开通的准自然实验研究

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南方经济 2023年第2期 22-45页

作者：孙林陈霜俞慧洁浙江工业大学经济学院

多产品企业出口产品组合调整是企业内资源优化配置的核心内容,多产品企业更集中于核心产品有助于实现贸易高质量发展。文章使用2008—2014年工企海关匹配数据,以中欧班列开通为准自然实验,采用多期DID的方法通过辐网效应和多产品企业运... 详细信息

多产品企业出口产品组合调整是企业内资源优化配置的核心内容,多产品企业更集中于核心产品有助于实现贸易高质量发展。文章使用2008—2014年工企海关匹配数据,以中欧班列开通为准自然实验,采用多期DID的方法通过辐网效应和多产品企业运输方式比重变化相结合的实证策略考察了处理组(受到中欧班列开通影响的企业)和对照组(未受到中欧班列开通影响的企业)的产品组合差异,探讨了中欧班列开通对中国多产品企业出口产品组合的影响。研究发现:中欧班列的开通使中国多产品企业更倾向于出口其销量表现更好的核心产品,同时验证了辐网效应的存在和影响边界。中欧班列开通对企业内出口产品组合的影响主要通过“鲶鱼效应”和竞争效应两种中间机制产生作用。最后,文章从产品要素密集度、目的国市场规模和企业竞争策略三方面进行了异质性分析,发现以工业制成品出口为主导、目的国市场规模更大、采取质量竞争的中国多产品企业更倾向于出口核心产品。文章为多产品企业在面临外部环境变化时实现企业内资源优化配置提供了新的证据,为深入推进“一带一路”高质量发展提供了可选路径。

关键词：产品组合中欧班列鲶鱼效应多产品企业

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基于分数阶导数的金属橡胶动态特性建模

材料科学与工程学报 2021年第1期39卷 52-57页

作者：余慧杰贺涛上海理工大学机械工程学院上海200093

金属橡胶材料具有非线性和黏弹性的动态特性。本研究用三次非线性函数描述其非线性特性,用分数阶三元模型描述其黏弹性,即分别用经典三元模型与分数阶三元模型,结合金属橡胶动态试验数据进行模型参数识别,发现分数阶三元模型能更准确地... 详细信息

金属橡胶材料具有非线性和黏弹性的动态特性。本研究用三次非线性函数描述其非线性特性,用分数阶三元模型描述其黏弹性,即分别用经典三元模型与分数阶三元模型,结合金属橡胶动态试验数据进行模型参数识别,发现分数阶三元模型能更准确地描述金属橡胶黏弹性力。不同振幅下金属橡胶迟滞曲线的拟合结果表明,分数阶模型可以较好地拟合不同工况条件下金属橡胶的迟滞曲线,为金属橡胶材料动态特性建模提供理论参考。

关键词：金属橡胶动态特性黏弹性材料分数阶导数