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New Residual Based Stabilization Method for the Elasticity Problem

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Advances in Applied Mathematics and Mechanics 2018年第1期10卷 100-113页

作者： Minghao Li Dongyang Shi ying Dai College of Science Henan University of TechnologyZhengzhouHenan 450001China School ofMathematics and Statistics ZhengzhouUniversityZhengzhouHenan 450001China School of Aerospace Engineering and AppliedMechanics Tongji UniversityShanghai 200092China

In this paper,we consider the mixed finite element method(MFEM)of the elasticity problem in two and three dimensions(2D and 3D).We develop a new residual based stabilization method to overcome the inf-sup difficulty,and use Langrange elements to approximate the stress and *** new method is unconditionally stable,and its stability can be obtained directly from C´ea’s *** error estimates for the H1-norm of the displacement and H(div)-norm of the stress can be obtained at the same *** results show the excellent stability and accuracy of the new method.

关键词： Elasticity MFEM residuals stabilization

Determination of Cationic Surfactant by Laser Thermal Lens Spectrometry

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Chinese Chemical Letters 2002年第11期13卷 1107-1110页

作者： Hong Tao YAN ying ZHANG Yang YAN Department of Chemistry Northwest UniversityXian 710069

A novel method for the determination of cationic surfactant by laser thermal lens spectrometry was developed. It was based on the reaction between 1-hydroxy-2-(5-nitro-2-Pyri- dylazo)-8-aminonaphthalene-3,6-disulfonic acid (5-NO2-PAH) and cationic surfactant to form 1:2 ionic association complex in a weakly basic medium (pH 9.44). The determination conditions and the mechanism were discussed. The method has been applied to the analysis of wastewater and moat water samples.

关键词： Determination of cationic surfactant cetylpyridinium bromide (CPB) cetyltri- methyl-ammonium bromide (CTMAB) 1-hydroxy-2-(5-nitro-2-pyridylazo)-8-aminonaphthalene- 3,6-disulfonic acid (5-NO2-PAHA) laser thermal lens spectrometry.

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航天器转动惯量在线辨识

系统仿真学报 2010年第5期22卷 1117-1120页

作者：黄河周军刘莹莹西北工业大学精确制导与控制研究所西安710072

可靠和有效的高精度姿态控制需要已知卫星变化的质量特性的精确信息,在线辨识航天器的转动惯量显得尤为重要。利用飞轮作为执行机构,分别提出了一种基于递推最小二乘法的航天器转动惯量在线开环辨识和闭环辨识的算法。当飞轮输出合适的... 详细信息

可靠和有效的高精度姿态控制需要已知卫星变化的质量特性的精确信息,在线辨识航天器的转动惯量显得尤为重要。利用飞轮作为执行机构,分别提出了一种基于递推最小二乘法的航天器转动惯量在线开环辨识和闭环辨识的算法。当飞轮输出合适的控制力矩时,能够快速辨识出处于开环状态的航天器转动惯量,并且保证航天器的姿态变化在可接受的范围内。提出了一种闭环辨识方法,基于变结构控制器,在航天器完成姿态机动任务的同时,能够快速辨识出航天器的转动惯量,辨识精度在2%之内。

关键词：航天器转动惯量在线估计闭环辨识变结构控制器

Sirt3 is critical for p53-mediated ferroptosis upon ROS-induced stress

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Journal of Molecular Cell Biology 2021年第2期13卷 151-154页

作者： ying Jin Wei Gu Weichang Chen Department of Gastroenterology The First Affiliated Hospital of Soochow UniversitySuzhou 215006China Institute for Cancer Genetics and Department of Pathology and Cell Biologyand Herbert Irving Comprehensive Cancer CenterCollege of Physicians&SurgeonsColumbia UniversityNew YorkNY 10032USA Department of Gastroenterology Suzhou Ninth People’s HospitalSuzhou 215200China

Dear Editor,p53 acts as a transcription factor to modulate various types of cellular processes to suppress tumor development(Tackmann and Zhang,2017).The exquisite regulation of p53 functions is of vital importance for cell fate *** it is well accepted that p53-mediated cell-cycle arrest,senescence,and apoptosis serve as major tumor suppression mechanisms,recent studies suggest that other unconventional activities such as ferroptosis are also critically involved in its tumor suppressor function(Li et al.,2012).We and others found that p53 plays an important role in modulating ferroptotic responses through its metabolic targets(Jiang et al.,2015;Jennis et al.,2016;Wang et al.,2016).Ferroptosis is a regulated form of iron-dependent,non-apoptotic cell death characterized by excessive reactive oxygen species(ROS)generation and accumulation of lipid peroxidates(Stockwell et al.,2020).Lipid peroxides are normally eliminated by glutathione peroxidase 4(GPX4)and its co-factor glutathione(GSH),which convert lipid hydroperoxides to non-toxic lipid ***,ferroptosis can be artificially induced by pharmacological agents that disrupt this lipid repair system,allowing lethal accumulation of lipid *** agents include direct GPX4 enzymatic inhibitors,as well as the small molecule erastin,which suppress glutathione synthesis and indirectly suppress GPX4 activation(Stockwell et al.,2020).Although activation of p53 expression is able to modulate ferroptosis induced by GPX4 inhibition in certain cell types(Jiang et al.,2015),p53-mediated ferroptotic responses are also observed upon ROS-induced stress,apparently through a GPX4-independent manner(Chu et al.,2019).Nevertheless,the molecular factors that modulate p53-dependent ferroptosis upon ROS stress need further ***3 is a NAD-dependent deacetylase predominantly localized in mitochondria,which functions in multiple metabolic pathways,including electron transport chain,fatty acid oxidation,a

关键词： metabolism Lipid stress

Experimental study of drag reduction in flumes and spillway tunnels

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Water Science and Engineering 2010年第2期3卷 200-207页

作者： ying-kui WANG Chun-bo JIANG State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 P. R. China

Experiments in an open flume model and spillway tunnel model were carried out using drag reduction techniques. Two drag reduction techniques were adopted in the experiments： polymer addition and coating. The drag reduction effect of a polyacrylamide （PAM） solution and dimethyl silicone oil coating were studied in the flume model experiments, and the results were analyzed. Experiments were then carded out with a model of the Xilnodu Hydropower Station, the second largest dam in China. In order to reduce the resistance, the spillway tunnels were internally coated with dimethyl silicone oil. This is the first time that these drag reduction techniques have been applied to so large a hydraulic model. The experimental results show that the coating technique can effectively increase flood discharge. The outlet velocity and the jet trajectory distance are also increased, which enhances the energy dissipation of the spillway tunnel.

关键词： drag reduction hydraulic model experiment spillway tunnel

Controlled drug delivery systems based on calixarenes

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Chinese Chemical Letters 2015年第7期26卷 825-828页

作者： Yue Zhou Hui Li ying-Wei Yang State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC) Jilin University

In recent years, cancer has become the number two cause of death around the world, and scientists have exploited various treatment maps. Calixarenes, with diversified features, have been widely applied into drug delivery systems, which can respond to multi-stimuli and exhibit excellent performance. In this mini-review, we summarize the recent advances on controlled drug delivery systems based on calixarenes, in the form of inclusion complexes, amphiphilic self-assembly nanocarriers including micelles, hydrogels, vesicles and liposomes, and supramolecular nanovalves on mesoporous silica nanomaterials.

关键词： Drug delivery systems Calixarenes Assembly Nanocarriers

Interaction of straight chain alcohol vapors with self-assembled MOF film by surface plasmon resonance sensing and imaging

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Chinese Chemical Letters 2013年第7期24卷 651-653页

作者： Jun Chen Ji-ying Xu Yi Chen Key Lab of Analytical Chemistry for Living Biosystems Institute of ChemistryChinese Academy of Sciences Beijing National Laboratory of Molecular Science

Interaction of straight chain alcohol vapors with MOF-199-functionalized films was studied by SPR. The signals had linear relationships with the concentration of alcohols over a wide range from 0 to 70% （v/v） and we... 详细信息

关键词： Layer by layer self-assemble of MOF Oriented growth Alcohol vapors detection Surface plasmon resonance or SPR

Enhanced Tribological Performance of Diamond Films by Utilizing DLC and DLC-H Top Layers

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Journal of Shanghai Jiaotong university(Science) 2023年第5期28卷 665-675页

作者：雷学林严莹张航李子璇何云 School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China

High-performance diamond films are highly demanded on tool surfaces for wire-drawing and mechanical sealing ***,this work aims at enhancing the tribological performance of chemical vapor deposition diamond films in water-lubricated conditions by utilizing non-hydrogenated and hydrogenated diamond-like carbon(DLC and DLC-H)top *** tribological properties of bilayer micro-crystalline diamond(MCD)/DLC,MCD/DLC-H,nano-crystalline diamond(NCD)/DLC and NCD/DLC-H films are evaluated,in terms of maximal and stable coefficients of friction(COFs),C—C bonds transformation,worn surface morphology and specific wear *** results show that DLC or DLC-H coated on diamond layer significantly suppresses the initial maximal COF peak and the wear of counterpart ***,severe regular arranged sp^(2) C—C bonds transformation is detected on MCD film,in comparison to NCD;while inversely,the NCD/DLC bilayer exhibits severer C—C bonds transformation effect compared with the MCD/***,the DLC-H top layer shows a larger decreasing rate of maximal COFs and wear rates of counterpart balls,compared with the DLC coating,which is due to its superior *** all the tested films,the NCD/DLC-H bilayer shows an optimized tribological performance.

关键词： diamond film diamond-like carbon(DLC) bilayer tribology

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裂谷盆地构造-热演化模拟中几个问题的讨论

地球物理学报 2015年第2期58卷 601-612页

作者：刘琼颖何丽娟中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029 中国科学院大学北京100049

裂谷盆地的构造-热演化模拟是在岩石圈尺度计算裂谷盆地形成演化过程中的热历史和沉降史.拉张模型实现了构造和热的完美结合,在描述裂谷盆地沉降和热流演化方面取得了很大的成功.本文使用二维运动学模型,通过有限元方法,在拉格朗日坐标... 详细信息

裂谷盆地的构造-热演化模拟是在岩石圈尺度计算裂谷盆地形成演化过程中的热历史和沉降史.拉张模型实现了构造和热的完美结合,在描述裂谷盆地沉降和热流演化方面取得了很大的成功.本文使用二维运动学模型,通过有限元方法,在拉格朗日坐标系下进行拉张背景下的构造热演化模拟,探讨了拉张模型中初始地壳、岩石圈厚度、软流圈对流、模型上边界对构造热演化的影响,以及载水和载沉积物两种情况下盆地侧翼抬升的差异.

关键词：裂谷盆地构造-热演化模拟拉张模型热流构造沉降温度场