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Numerical prediction of the flow property in round turbulent jet of fiber suspension

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Science china(Physics,mechanics & Astronomy) 2013年第2期56卷 298-305页

作者： lin jianzhong LIANG XiaoYu {2. suhua department of mechanics Zhejiang University College of Metrology & Measurement Engineering China Jiliang University

The equation of probability distribution function for mean fiber orientation,and the equations of Reynolds averaged NavierStokes,turbulence kinetic energy and turbulence dissipation rate with the additional term of the fibers are derived and solved *** effects of fiber concentration and fiber aspect-ratio on the mean velocity profile,turbulent kinetic energy and turbulent viscosity are *** results show that the mean axial velocity gradient increases near the centerline and decreases near the outside,respectively,as the fiber concentration *** mean axial velocity decreases with increasing the fiber concentration at the same radial *** centerline mean axial velocity decreases with axial distance,and this phenomenon is more obvious as the fiber concentration *** turbulent kinetic energy and turbulent viscosity increase over the jet region with an increasing fiber *** variation tendency of mean axial velocity,turbulence kinetic energy and turbulence viscosity with fiber aspect-ratio is the same as that with fiber *** difference is that the variation with fiber concentration is more obvious than with fiber aspect-ratio.

关键词： turbulent fiber suspension round jet numerical simulation flow property

LDA抽运Nd∶YLF再生放大器的实验研究

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中国激光 2003年第8期30卷 677-680页

作者：韦辉张生佳许世忠马忠林沈磊曾文章陈绍和中国科学院上海光学精密机械研究所泉州师范学院物理系中国科学院上海光学精密机械研究所上海2.1800 福建泉州362.00

研制了一台激光二极管列阵 (LDA)抽运的Nd∶YLF再生放大器。再生放大器工作波长 1 0 5 3nm ,重复频率 1Hz,输出 4ns宽基横模TEM0 0 激光脉冲的能量为 2.J。总放大倍数达到了 1× 1 0 7,输出能量稳定性优于± 4 7%(峰值 )。给出了再生放... 详细信息

研制了一台激光二极管列阵 (LDA)抽运的Nd∶YLF再生放大器。再生放大器工作波长 1 0 5 3nm ,重复频率 1Hz,输出 4ns宽基横模TEM0 0 激光脉冲的能量为 2.J。总放大倍数达到了 1× 1 0 7,输出能量稳定性优于± 4 7%(峰值 )。给出了再生放大器的实验装置和有关实验结果

关键词：激光技术再生放大多程放大激光二极管列阵

激光二极管列阵抽运的高稳定Nd∶YLF环形激光器

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中国激光 2004年第1期31卷 5-8页

作者：韦辉许世忠马忠林张生佳沈磊曾文章陈绍和中国科学院上海光学精密机械研究所泉州师范学院物理系中国科学院上海光学精密机械研究所上海2.1800 福建泉州362.00

成功研制了一台激光二极管列阵 (LDA)抽运的高稳定Nd∶YLF环形激光器。用输出激光强度负反馈控制谐振腔的增益 ,建立了准连续的～ 10 0 μs宽预激光状态 ,然后在此预激光基础上调Q。由于预激光模式与谐振腔固有模式一致并且具有一定强... 详细信息

成功研制了一台激光二极管列阵 (LDA)抽运的高稳定Nd∶YLF环形激光器。用输出激光强度负反馈控制谐振腔的增益 ,建立了准连续的～ 10 0 μs宽预激光状态 ,然后在此预激光基础上调Q。由于预激光模式与谐振腔固有模式一致并且具有一定强度 ,调Q脉冲的建立时间和幅度都很稳定。实验结果为 :输出调Q脉冲强度起伏不超过4 3% ,时间抖动小于± 4ns。

关键词：激光技术环形激光器负反馈预激光精密同步激光二极管列阵

GdFeCo/DyFeCo交换耦合两层薄膜磁化方向转变的研究

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物理学报 2004年第2期53卷 614-619页

作者：张约品王现英林更琪李震李佐宜沈德芳干福熹中国科学院上海光学精密机械研究所华中科技大学电子科学与技术系武汉430074

用磁控溅射法制备了GdFeCo DyFeCo交换耦合两层薄膜 ,对交换耦合两层薄膜变温磁化方向进行了研究 .结果表明读出层GdFeCo随温度上升从平面磁化转变成垂直磁化 ,转变过程中主要受饱和磁矩 (Ms)的影响 .在GdFeCo的补偿温度附近 ,读出层的... 详细信息

用磁控溅射法制备了GdFeCo DyFeCo交换耦合两层薄膜 ,对交换耦合两层薄膜变温磁化方向进行了研究 .结果表明读出层GdFeCo随温度上升从平面磁化转变成垂直磁化 ,转变过程中主要受饱和磁矩 (Ms)的影响 .在GdFeCo的补偿温度附近 ,读出层的磁化强度近于零 ,退磁场能减小 ,并在交换耦合的作用下 ,使读出层的磁化方向发生转变。

关键词：磁光记录交换耦合两层薄膜磁化方向转变磁控溅射法饱和磁矩补偿温度磁化强度中心孔磁超分辨效应

鱼油脂肪乳联合肠外营养支持对先天性心脏病术后机械通气患儿血气指标及呼吸力学的影响

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临床小儿外科杂志 2024年第7期23卷 627-632页

作者：沈美丽陈志旭陈伟虹许成娜林益虎位永娟泉州市儿童医院重症医学科泉州泉州市儿童医院小儿外科泉州

目的探讨鱼油脂肪乳联合肠外营养支持对先天性心脏病术后机械通气患儿血气指标及呼吸力学的影响。方法回顾性分析2.2.年1月至2.2.年10月泉州市儿童医院重症医学科先天性心脏病外科手术后行机械通气治疗的50例患儿临床资料, 采用随机双... 详细信息

目的探讨鱼油脂肪乳联合肠外营养支持对先天性心脏病术后机械通气患儿血气指标及呼吸力学的影响。方法回顾性分析2.2.年1月至2.2.年10月泉州市儿童医院重症医学科先天性心脏病外科手术后行机械通气治疗的50例患儿临床资料, 采用随机双盲法将其分为研究组和对照组, 两组均为2.例。对照组于进入重症监护室(intensive care unit, ICU) 48 h后行肠外营养支持, 研究组于进入ICU 48 h后行肠外营养支持, 并在肠外营养基础上加用鱼油脂肪乳;两组均在干预7 d后进行效果评价, 包括营养指标、炎症因子、血气指标、呼吸力学指标。结果干预后, 研究组与对照组血清白蛋白(albumin, ALB)[(41.43±4.2.)g/L比(36.85±3.82.g/L]、前白蛋白(prealbumin, PA)[(182.32.2..2.)mg/L比(153.37±18.65)mg/L]、转铁蛋白(transferrin, TRF)[(2.62.0.57)g/L比(2.18±0.48)g/L]均较干预前升高, 差异有统计学意义(P2.[(81.33±6.2.)mmHg比(72.85±8.15)mmHg]、氧合指数[(2.8.87±35.12.比(2.3.54±31.65)]、弥散指数[(2.4.37±36.32.比(2.3.64±2..85)]较干预前升高, 动脉二氧化碳分压(partial pressure of carbon dioxide in arterial blood, PaCO2.[(43.46±4.2.)mmHg比(48.87±5.32.mmHg]、Lac[(1.35±0.2.)mmol/L比(92.12.0.2.)mmol/L]较干预前降低, 其中研究组PaO2.氧合指数、弥散指数高于对照组, PaCO2.Lac低于对照组, 差异有统计学意义(P2.±3.53)pg/mL比(16.65±3.85)pg/mL]、IL-6[(52.54±8.45)pg/mL比(73.32.9.37)pg/mL]、肿瘤坏死因子(tumor necrosis factor, TNF)-α[(6.35±1.14)μg/L比(9.32.1.85)μg/L]较干预前降低, 且研究组低于对照组, 差异有统计学意义(P2.±2.35)cmH2./L·s比(11.2.±2.87)cmH2./L·s]较干预前降低, 肺顺应性(lung compliance, CL)[(35.37±5.2.)mL/cmH2.比(30.82.4.83)mL/cmH2.]较干预前升高, 其中研究组Raw低于对照组, CL高于对照组, 差异有统计学意义(P<0.05)。结论鱼油脂肪乳联合肠外营养支持用于先天性心脏病术后机械通气患儿, 能改善机体营养状况, 降低炎症因子表达, 促进血气指标恢复, 改善呼吸力学。

关键词：机械通气鱼油脂肪乳肠外营养外科手术儿童

The prognostic factors of effective ketoconazole treatment for metastatic castration-resistant prostate cancer： who can benefit from ketoconazole therapy？

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Asian Journal of Andrology 2012年第5期14卷 732-737页

作者： Guo-Wen lin Xu-Dong Yao Ding-Wei Ye Yao Zhu Shi-lin Zhang Bo Dai Hai-Liang Zhang Yi-Jun {2. Chun-Guang Ma department of Urology Fudan University Shanghai Cancer CenterShanghai 200032China department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China

We investigated the prognostic value of some variables of effective ketoconazole treatment for metastatic castration-resistant prostate cancer （mCRPC）. In total, 163 patients with mCRPC were eligible, receiving ketoconazole 2.0-400 mg three times daily with replacement doses of prednisone. Progression-free survival （PFS） was calculated from the beginning of the ketoconazole therapy to the onset of disease progression. The prognostic value of different variables for PFS was assessed by Cox regression analysis. The median PFS was 2.6 months （0.5-8.6 months） for these patients. The serum testosterone level changed during therapy, which decreased when the prostate-specific antigen （PSA） declined; the serum testosterone level increased as the levels of PSA relapsed. The median PFS values for patients associated with different factors were the following： 1.4 and 3.5 months for a nadir PSA of ≥ 0.2.and 〈0.2.ng ml- 1, respectively （hazard rate （HR）=4.767, P〈0.001）; 3.1 and 1.6 months for a baseline testosterone of ≥0.1 and 〈0.1 ng m1-1, respectively （HR=2.865, P=0.012.; 2.8 and 1.9 months for a baseline haemoglobin of ≥ 12. and 〈12. g 1-1, respectively （HR= 1.605, P〈0.001）; and 3.0 and 1.9 months for a PSA doubling time （PSADT） of ≥ 2.0 and 〈2.0 months, respectively （HR= 1.454, P=-0.017）. A risk model was constructed according to the four factors that divided patients into three subgroups of low risk （0-1 factors）, moderate risk （2.factors） and high risk （3-4 factors） with PFS values of 3.6, 3.0 and 1.4 months, respectively （HR=1.619, P〈0.001）. A nadir PSA of ≥0.2.ng m1-1, a baseline testosterone of 〈0.1 ng m1-1, a baseline haemoglobin of 〈 12. g I- 1 and a PSADT of 〈2.months were associated with a poor PFS. This risk model could provide evidence to predict the survival benefit of ketoconazole therapy.

关键词： castration-resistant prostate cancer ketoconazole therapy predictor progression-free survival

Million-scale data integrated deep neural network for phonon properties of heuslers spanning the periodic table

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npj Computational Materials 2023年第1期9卷 2155-2166页

作者： Alejandro Rodriguez Changpeng lin Hongao Yang Mohammed Al-Fahdi Chen shen Kamal Choudhary Yong Zhao Jianjun Hu Bingyang Cao Hongbin Zhang Ming Hu department of Mechanical Engineering University of South CarolinaColumbiaSC 29208USA Theory and Simulation of Materials(THEOS) École Polytechnique Fédérale de LausanneCH-1015 LausanneSwitzerland Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering MechanicsTsinghua UniversityBeijing 100084China Institute of Materials Science Technical University of DarmstadtDarmstadt 64287Germany Materials Science and Engineering Division National Institute of Standards and TechnologyGaithersburgMD 20899USA department of Computer Science and Engineering University of South CarolinaColumbiaSC 29208USA

Existing machine learning potentials for predicting phonon properties of crystals are typically limited on a material-to-materialbasis, primarily due to the exponential scaling of model complexity with the number of atomic species. We address this bottleneckwith the developed Elemental Spatial Density Neural Network Force Field, namely Elemental-SDNNFF. The effectiveness andprecision of our Elemental-SDNNFF approach are demonstrated on 11,866 full, half, and quaternary Heusler structures spanning 55elements in the periodic table by prediction of complete phonon properties. Self-improvement schemes including active learningand data augmentation techniques provide an abundant 9.4 million atomic data for training. Deep insight into predicted ultralowlattice thermal conductivity (2.Weyl points, referred to as “double Weyl points”, are found in 68% and 87% of 1662.half and 1550quaternary Heuslers, respectively.

关键词： properties phonon spanning

Analyzing and modeling rheological behavior of liver fibrosis in rats using shear viscoelastic moduli

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Journal of zhejiang University-Science B(Biomedicine & Biotechnology) 2014年第4期15卷 375-381页

作者： Ying ZHU Yi ZHENG Yuan-yuan shen Xin CHEN Xin-yu ZHANG Hao-ming lin Yan-rong GUO Tian-fu WANG Si-ping CHEN National-Regional Key Technology Engineering Laboratory for Medical Ultrasound Department of Biomedical EngineeringSchool of MedicineShenzhen University department of Electrical and Computer Engineering St. Cloud State University

The process of liver fibrosis changes the rheological properties of liver *** study characterizes and compares liver fibrosis stages from F0 to F4 in rats in terms of shear viscoelastic *** two viscoelastic models,the Zener model and Voigt model,were applied to experimental data of rheometer tests and then values of elasticity and viscosity were estimated for each fibrosis *** results demonstrate that moderate fibrosis（≤F2. has a good correlation with liver *** mean Zener elasticity E1 increases from（0.452.0.094） kPa（F0） to（1.311±0.717） kPa（F2.,while the mean Voigt elasticity E increases from（0.618±0.089） kPa（F0） to（1.701±0.844） kPa（F2..The mean Zener viscosity increases from（3.499±0.186） Pa·s（F0） to（4.947±1.811） Pa·s（F2. and the mean Voigt viscosity increases from（3.379±0.316） Pa·s（F0） to（4.62.±1.2.6） Pa·s（F2..Compared with viscosity,the elasticity shows smaller variations at stages F1 and F2.no matter what viscoelastic model is ***,the estimated elasticity is more effective than viscosity for differentiating the fibrosis stages from F0 to F2.

关键词： Biological mechanics Rheological properties Liver fibrosis Viscoelasticity Shear modulus Elasticity Viscosity Zener model Voigt model

Direct visualization of percolating metal-insulator transition in V_(2.O_(3) using scanning microwave impedance microscopy

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Science china(Physics,mechanics & Astronomy) 2022年第9期65卷 112-118页

作者： Weiyan lin Huanyu Zhang Yoav Kalcheim Xinchen Zhou Fubao Yang Yang Shi Yang Feng Yihua Wang Jiping Huang Ivan KSchuller Xiaodong Zhou Jian shen State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing Fudan UniversityShanghai 200433China department of Physics Fudan UniversityShanghai 200433China department of Physics University of California San DiegoLa Jolla 92093USA Center for Advanced Nanoscience University of California San DiegoLa Jolla 92093USA Key Laboratory of Micro and Nano Photonic Structures(MOE) Fudan UniversityShanghai 200433China Beijing Academy of Quantum Information Science Beijing 100193China Shanghai Research Center for Quantum Sciences Shanghai 200433China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China Shanghai Qi Zhi Institute Shanghai 200232China Zhangjiang Fudan International Innovation Center Fudan UniversityShanghai 201203China

Using the extensively studied V_(2.O_(3) as a prototype system, we investigate the role of percolation in metal-insulator transition(MIT). We apply scanning microwave impedance microscopy to directly determine the metallic phase fraction p and relate it to the macroscopic conductance G, which shows a sudden jump when p reaches the percolation threshold. Interestingly, the conductance G exhibits a hysteretic behavior against p, suggesting two different percolating processes upon cooling and warming. Based on our image analysis and model simulation, we ascribe such hysteretic behavior to different domain nucleation and growth processes between cooling and warming, which is likely caused by the decoupled structural and electronic transitions in V_(2.O_(3) during MIT. Our work provides a microscopic view of how the interplay of structural and electronic degrees of freedom affects MIT in strongly correlated systems.

关键词： electronic phase separation metal-insulator transition percolation theory scanning microwave impedance microscopy