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Prediction of Primary Dendrite Arm Spacing in Pulsed Laser Surface Melted Single Crystal Superalloy

Acta Metallurgica Sinica(English Letters) 2021年第4期34卷 485-494页

作者： Shiwei Ci Jingjing Liang Jinguo Li Haiwei Wang Yizhou Zhou Xiaofeng Sun Hongwei Zhang Yutian Ding Xin Zhou Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Space Manufacturing technology(CAS Key Lab) Beijing100094China taizhou xinma technology industry develepment co.ltd Taizhou318000China State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metal Lanzhou University of Technology287 Langongping RoadLanzhou730000China Science and technology On Plasma Dynamics Laboratory Air Force Engineering UniversityXi’an710000China

Primary dendritic arm spacing(PDAS)is an important microstructure feature of the nickel-base single crystal *** this paper,a numerical model predicting the PDAS evolution with additive manufacturing parameters using pulsed laser is established,which combines the theoretical PDAS models with the temperature field calculation model during pulsed laser *** on this model,processing maps that related process parameters to the evolution of PDAS are *** obtain more accurate prediction model,the parameters of different solidification conditions,G^(-0.5)V^(-0.25) and G^(-0.5)V^(-0.25),are selected to calculate *** simulation results show that the PDAS increases as the arise of P and *** processmgPDAS map can accurately predict the evolution of PDAS with pulsed laser process parameters,which is well in accordance with the experimental ***,the PDAS values calculated by the G^(-0.5)V^(-0.25) are more in line with the experimental results than those calculated by the G^(-0.5)V^(-0.25).

关键词： Additive manufacturing Nickel-base superalloy Single crystal Pulsed laser Primary dendritic arm spacing

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Disturbance Rejection for Systems With Uncertainties Based on Fixed-Time Equivalent-Input-Disturbance Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第12期11卷 2384-2395页

作者： Qun Lu Xiang Wu Jinhua She Fanghong Guo Li Yu the School of Aeronautical Engineering Taizhou UniversityJiaojiang 318000 the Zhejiang Dafeng industry co. Ltd.Hangzhou 315400China the Zhejiang Provincial United Key Laboratory of Embedded Systems Zhejiang University of TechnologyHangzhou 310023China IEEE the School of Engineering Tokyo University of TechnologyTokyo 192-0982Japan

This paper presents a fixed-time equivalent-inputdisturbance(EID)approach to deal with the problem of robust output-feedback control for perturbed uncertain *** method uses the basic structure of the conventional EID approach and treats uncertainties and disturbances as a lumped disturbance on the control-input channel.A fixed-time state observer enables state estimation,which resolves the causality issue in an EID-based control system,is finished in a fixed *** implicit Lyapunov function,the homogeneity with dilation,the input-tostate stability,and the small-gain theorem are used to analyze the convergence and robustness of the EID-based system with measurement *** and experimental results are presented to demonstrate the effectiveness and superiority of the proposed method.

关键词： Disturbance rejection equivalent-input-disturbance(EID)approach fixed-time stability measurement noise output feedback control

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cost-Effectiveness Analysis of Vaccination compliance Strategies Using a Novel Hybrid Model for Influenza Vaccination

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China CDC weekly 2024年第50期6卷 1337-1342,I0006-I0012页

作者： Dongfang You Yi Zhou Yan Yan Feng Chen Mengyi Lu Fang Shao Department of Biostatistics School of Public HealthNational Vaccine Innovation PlatformNanjing Medical UniversityNanjing CityJiangsu ProvinceChina Pharmaceutical industry technology Research Institute of Nanjing Medical University Taizhou CityJiangsu ProvinceChina Nanjing Hanwei Public Health Research Institute co. LtdNanjing CityJiangsu ProvinceChina China International cooperation Center for Environment and Human Health Center for Global HealthNanjing Medical UniversityNanjing CityJiangsu ProvinceChina

Introduction:The cost-effectiveness of vaccination strategies plays a crucial role in managing infectious diseases such as influenza within public health *** study evaluated the cost-effectiveness of vaccination compliance strategies by comparing an“adherence”strategy,which promoted continuous vaccination uptake,with a“volunteer”strategy through model-based ***:We developed a novel hybrid model that integrates continuous-time agent-based models(ABMs)with a Markov model to simulate vaccination behaviors and disease dynamics at the individual *** model incorporated socioeconomic factors,vaccine efficacy,and population interactions to evaluate the long-term health outcomes and associated costs of different vaccination compliance ***:Simulation results demonstrated that the“adherence”strategy significantly enhanced vaccination coverage and reduced influenza cases,yielding an incremental cost-effectiveness ratio(ICER)of 33,847 CNY per quality-adjusted life year(QALY)gained,indicating superior cost-effectiveness compared to the“volunteer”***:Our findings support implementing targeted influenza vaccination compliance strategies,presenting an innovative approach to strengthening public health interventions and enhancing vaccination program *** hybrid model shows promise in informing public health policy and practice,warranting further investigation of its applications across diverse public health contexts.

关键词： gained integrate yielding

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Bionics-Inspired Structure Boosts Drag and Noise Reduction of Rotating Machinery

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Journal of Bionic Engineering 2023年第6期20卷 2797-2813页

作者： Shengnan Tang Yong Zhu Shouqi Yuan Institute of Advanced Manufacturing and Modern Equipment technology Jiangsu UniversityZhenjiang212013China International Shipping Research Institute GongQing Institute of Science and TechnologyJiujiang332020China National Research Center of Pumps Jiangsu UniversityZhenjiang212013JiangsuChina Saurer(Changzhou)Textile Machinery co. LtdChangzhou213200China Leo Group co. LtdWenling317500China Wenling Fluid Machinery technology Institute of Jiangsu University Wenling317525China

As a global concern,environmental protection and energy conservation have attracted significant *** to the large carbon emission of electricity,promoting green and low-carbon transformation of the power industry via the synergistic development of clean energy sources is *** machinery plays a crucial role in pumped storage,hydropower generation,and nuclear power *** by bionics,non-smooth features of creatures in nature have been introduced into the structure design of efficient rotating ***,the concept and classification of bionics are ***,the representative applications of non-smooth surface bionic structures in rotating machineries are systematically and comprehensively reviewed,such as groove structure,pit structure,and other non-smooth ***,conclusions are drawn and future directions are *** effective design of a bionic structure contributes toward noise reduction,drag reduction and efficiency improvement of rotating *** and ecological rotating machinery will remarkably reduce energy consumption and contribute to the realization of the“double carbon”goal.

关键词： Bionics Rotating machinery Non-smooth surface Pit structure Groove structure

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Effect of Silica Fume on Early Performance of Precast concrete with Early Strength Agents

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Transactions of Nanjing University of Aeronautics and Astronautics 2022年第S01期39卷 90-97页

作者： GENG Fei LIANG Zizhao YANG Hangli WU Zhongqin ZHU Xiongwei XU Junlun college of Civil Aviation Nanjing University of Aeronautics and AstronauticsNanjing 211106P.R.China Jiangsu Yuhui Housing industry co. LtdTaizhou 225300P.R.China

The effect of silica fume on the early performance of precast concrete with an early strength agent was *** ternary compounding technique of silica fume,fly ash and early strength agent were used to examine the compressive strength,heat of hydration,hydration products,and microstructures of the precast *** experimental results showed that the optimum amount of silica fume in the precast concrete was 9%.Silica fume filled the fine pores between the cement ***,the cement hydration was mainly influenced by the waterto-cement ratio and cement particle *** the hydration reaction continued,silica fume provided more nucleation sites,and the characteristic volcanic ash reaction increased both the hydration degree and hydration rate of the early strength agent doped cementitious materials.

关键词： Silica fume concrete premature strength heat hydration pore structure

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Microstructure and mechanical properties of FecoCrNiMn high-entropy alloy produced by mechanical alloying and vacuum hot pressing sintering

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Transactions of Nonferrous Metals Society of China 2018年第7期28卷 1360-1367页

作者： Hu CHENG Yan-chong XIE Qun-hua TANG cong RAO Pin-qiang DAI School of Materials Science and Engineering Fuzhou UniversityFuzhou 350116China School of Mechanical Engineering Taizhou UniversityTaizhou 318000China School of Mechanical ＆ Electrical Engineering Putian UniversityPutian 351100China School of Materials Science and Engineering Fujian University of TechnologyFuzhou 350118China

Fe co Cr Ni Mn high-entropy alloys were produced by mechanical alloying（MA） and vacuum hot pressing sintering（VHPS）. Results showed that the nano-crystalline alloy powders were obtained by MA and the corresponding phase structures were composed of FCC matrices and low amounts of BCC and amorphous phases. After VHPS, the BCC phases almost disappeared, simultaneously with the precipitation of σ phases and M23C6 carbides. An increase of sintering temperature resulted in grain growth of the precipitated phases. As the sintering temperature was increased from 700 to 1000℃, the strain-to-failure of the alloys rose from 4.4% to 38.2%, whereas the yield strength decreased from 1682 to 774 MPa. The bulk FecoCrNiMn HEAs, consolidated by VHPS at 800℃ and 900℃ for 1 h, showed relatively good combination of strength and ductility.

关键词： high-entropy alloys microstructure mechanical properties powder metallurgy

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Selective Growth of GaN on Slope cone-shaped Patterned Sapphire Substrate

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Chemical Research in Chinese Universities 2014年第4期30卷 556-559页

作者： YANG Dechao LIANG Hongwei QIU Yu LI Pengchong LIU Yang SHEN Rensheng XIA Xiaochuan YU Zhennan CHANG Yuchun ZHANG Yuantao DU Guotong State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 P. R. China Department of Electronic Engineering Dalian Neusoft University of Information Dalian 116024 P. R. China School of Physics and Optoelectronic technology Dalian University of Technology Dalian 116024 P. R. China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 P. R. China Zhejiang Crystal-optech co. Ltd. Taizhou 318015 P. R. China

cone-shaped patterned sapphire substrate was prepared by inductively coupled plasma etching and GaN nucleation layer was grown on it by metal-organic chemical vapor deposition.A selective growth of GaN nucleation layer was found on the slope of the cone-shaped patterned sapphire substrat,and the distribution morphology of GaN had significantly changed after it was *** selective growth and redistribution were analyzed by investigating the distribution of crystallographic planes on the cone surface and the atom array of specific planes at atom level.

关键词： Patterned sapphire substrate GaN Selective growth Crystallographic plane

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Vibration mechanism research of large-scale and deep-water caisson

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Engineering Sciences 2011年第2期9卷 14-19页

作者： Yin Haihua Han Jingjing Jiangsu Provincial Yangtze River Highway Bridge construction commanding Department （JPCD） Taizhou Jiangsu 225321 China Nanjing Transportation Engineering co.ltd. Nanjing 210000 China

According to the construction method of taizhou Bridge, numerical simulation is conducted to analyze the vibration of caisson under wind and water flows to determine the main factors of the caisson vibration. Meanwhile, the localization system of caissons and anchors of taizhou Bridge is modeled in order to summarize the vibration mechanism of caissons under deep-water and jet-flow condition, and further pertinent vibration-control measures are proposed. The obtained results are well verified in engineering practice, and consequently the safety risk of positioning the caisson is reduced.

关键词： taizhou Bridge caisson foundation sensitivity analysis vibration mechanism vibration control methods

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Analysis of nicotine-induced metabolic changes in Blakeslea trispora by GC-MS

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2020年第2期21卷 172-177页

作者： Yang LIU You-ran SHAO Xiang-yu LI Zhi-ming WANG Li-rong YANG Yu-zhou ZHANG Mian-bin WU Jian-ming YAO Biotechnology Center Institute of Plasma Physics and Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and technology of China Hefei 230026China CABIO Bioengineering(Wuhan)co.ltd. Wuhan 436070China Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Zhejiang Key Laboratory of Antifungal Drugs Taizhou 318000China

Blakeslea trispora is a natural source of carotenoids,includingβ-carotene and lycopene,which have industrial ***,classical selective breeding techniques have been applied to generate strains with increased productivity,and microencapsulatedβ-carotene preparation has been used in food industry(Li et al.,2019).In ***,lycopene is synthesized via the mevalonate pathway(Venkateshwaran et al.,2015).Lycopene cyclase,which is one of the key enzymes in this pathway,is a bifunctional enzyme that can catalyze the cyclization of lycopene to produceβ-carotene and exhibit phytoene synthase activity(He et al.,2017).

关键词：代谢番茄红素尼古丁三孢布拉霉气相色谱-质谱

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Key technology for construction of connection between steel pylonand concrete pile cap of middle pylon of taizhou Bridge

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Engineering Sciences 2012年第3期10卷 8-11页

作者： Sun Yuxiang Zhang Hong Xiao Wenfu Huang Tao You Xinpeng China communications 2nd Navigational Bureau 2nd Engineering co. ltd. Chongqing 400042 China China communications 2nd Navigational Bureau co. ltd. Wuhan 430040 China Key Laboratory in communications industry for construction Technologies of Long and Large Bridges Wuhan 430040 China

taizhou Bridge is a suspension bridge with three pylons and two 1 080 m main spans. The middle pylon is a steel frame with longitudinal herringbone shape and lateral gate shape. The connection between steel pylon and concrete pile cap is a key part to transfer the huge inner force from the pylon to the foundation. Its construction quality is a critical factor to the overall structural loading of the whole bridge ; therefore the contact ratio between the bearing steel plate of pylon and concrete pile cap is required to be over 75 %. The inclined joint surface in two directions, longitudinally at 39/1 920 and laterally at 1/4, posted a challenge to the construction work. A procedure test was carried out to find an optimal construction method by comparison, and finally the post-injection method was selected as it can meet the requirement of concrete strength and contact ratio at the connection. The successful application of the post-injection method in taizhou Bridge can nrovide an examnle and reference for similar nroiects in the future.

关键词： middle pylon connection steel pylon concrete pile cap contact ratio post-injection method

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