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AN APPROACH TO SEPARATING THE CURRENT VELOCITY IN ESTUARINE AND COASTAL WATERS

Journal of Hydrodynamics 2009年第4期21卷 512-519页

作者： ni zhi-hui SONG zhi-yao WU Li-chun State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Ocean College Hohai University Nanj ing 210098 China Key Laboratory of Virtual Geographic Environment Ministry of Education Nanjing Normal University Nanjing 210097 China Chongqing Education College Chongqing 400067 China

In the near-shore waters, the actual flow is mainly induced by tide, wind and salinity, and the river water runoff should also be included as a component in the estuary waters. The interactions among these major components are very complicated. Many approaches were proposed to study isolated tide and wind-driven currents or run-off based on the measured velocity, with all its components taken as a whole. In this article, firstly, based on the actual hydrodynamic characteristics of estuarine and coastal waters, an approach is proposed to separate the measured velocity by considering the theoretical current velocity profiles and using the least squares method. The vertical structures of tidal, wind-driven currents, density current and runoff can be obtained as well as their proportions in the measured velocity. Then, this approach is applied to the analysis of velocity data obtained in the North Branch of Yangtze River estuary and of laboratory test data. The results are found to be satisfactory. Finally, this approach is used to separate the measured velocity in the South Branch of Yangtze River estuary, to determine not only the bed friction velocity and roughness height, but also the surface wind stress, and to estimate the wind velocity data above the water surface. The results show that this method is simple in principle, practical in use, and reasonable in obtained results. So it can be used to effectively analyze the field data.

关键词： tide wind-driven current density current river water runoff friction velocity roughness height velocity separation

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Constructing a 3D multichannel structure to enhance performance of ni–Co–Mn hydroxide electrodes for flexible supercapacitors

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Rare Metals 2024年第1期43卷 148-163页

作者： zhi-hui Xu Shi-Shuai Sun Xue-Lei Li zhi-hui Zhang Hai-Ying Li Shuang-Ting Ruan Shou-Gen Yin Key Laboratory of Display Materials and Photoelectric Devices(Ministry of Education)and Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China College of Science Tianjin University of TechnologyTianjin 300384China School of Materials Science and Engineering Inner Mongolia University of TechnologyHohhot 010051China

The balancing of the electrochemical performance,mechanical stability,and processing technology for applying supercapacitors to flexible and wearable electronics continues to encounter severe ***,we prepare ni-Co-Mn hydroxide electrodes with a threedimensional multichannel structure via a simple hydrothermal *** are constructed using vertically contiguous nano sheets with a uniform thickness and rough *** electrodes can provide numerous electroactive sites and accelerate the transmission of electrolyte *** relationship between the structure and electrochemical performances is verified by experiments and theoretical ***-dimensional(2D)planar and one-dimensional(1D)fiber electrodes are prepared using a flexible carbon cloth(CC)and carbon fiber(CF),respectively,as *** assembled quasi-solid-state flexible asymmetric supercapacitor(FASC)with a twodimensional sandwich structure using niCoMn-OH/CC as the electrode achieves a remarkable energy density of73.8 Wh·kg^(-1)at a power density of 1.03 kW·kg^(-1).The quasi-solid-state FASC with a 1D linear structure using niCoMn-OH/CF as the electrode also attains a high energy density(12.9 Wh·kg^(-1)at a power density of0.75 W·kg^(-1)).Moreover,the electrochemical performances of the niCoMn/CC//AC/CC and niCoMn/CF//AC/CF FASCs are not disturbed at different bending angles(0°,45°,90°,135°and 180°),This indicates the superior flexibility of the *** also assemble a self-powered energy-harvesting storage system by integrating FASCs and commercial solar cells to verify its *** displays sustainable development potential for energy storage.

关键词： Supercapacitors Flexible ni–Co–Mn hydroxide 3D multichannel structure High performances

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Effect of La on the Corrosion Behavior and Mechanism of 3ni Weathering Steel in a Simulated Marine Atmospheric Environment

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 308-324页

作者： Gang niu Rui Yuan R.D.K.Misra Na Gong zhi-hui Zhang Hao-Xiu Chen hui-Bin Wu Cheng-Jia Shang Xin-Ping Mao Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing100083China Laboratory for Excellence in Advanced Steel Research Department of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX79968USA Institute of Materials Research and Engineering Agency for ScienceTechnologyand ResearchSingapore138634Singapore Department of Materials Science and Engineering University of TorontoTorontoONM5S 3E4Canada

The corrosion behavior and mechanism of 3ni weathering steel in a simulated oceanic atmospheric environment are investigated in order to comprehend the impacts of La,as determined through electrochemical analysis and rust layer *** results of this study demonstrate that the addition of La enhances the corrosion resistance of 3ni weathering steel in the marine atmospheric environment,thereby reducing the corrosion rate and improving the protection of the rust *** influence of La on corrosion resistance can be attributed to two primary ***,La functions as a grain refiner,minimizing the potential difference of the micro-regions on the substrate surface,thereby significantly reducing the corrosion of bare steel in the marine ***,La inhibits the process of Fe_(3)O_(4) oxidation back toγ-FeOOH during corrosion at the local site,thus decreasing the formation ofγ-FeOOH and enhancing the charge transfer *** research work may serve as a reference for expanding the application of rare earth elements in the field of weathering steel.

关键词： Weathering steel Rare earth Rust layer Corrosion behavior Corrosion resistance

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Characteristics and mechanism of ni^(2+)and Cd^(2+)adsorption by recovered perlite from agar extraction residue

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Chinese Journal of Chemical Engineering 2024年第8期72卷 141-152页

作者： Juan Wang Yanbing Zhu Zedong Jiang Xiping Du Mingjing Zheng Lijun Li hui ni Yuanpeng Wang zhipeng Li Qingbiao Li College of Ocean Food and Biological Engineering Jimei UniversityXiamen 361021China Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering Xiamen 361021China Research Center of Food Biotechnology of Xiamen City Xiamen 361021China Xiamen Ocean Vocational College Xiamen 361021China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361021China

ni^(2+)and Cd^(2+)in wastewater accumulated through the ecological chain and could jeopardize human *** of ni^(2+)and Cd^(2+)from wastewater using recovered perlite was an important way to solve the problem of resource utilization of solid waste from agar *** previous study confirmed that recovered perlite from agar extraction residue had better pore size and specific surface area than commercial ***,the adsorption efficiency and adsorption mechanism of recovered perlite were the main factors limiting its adsorption *** adsorption process of ni^(2+)and Cd^(2+)by recovered perlite in aqueous solution was described by the pseudo-second-order kinetic equation,and the relevant adsorption mechanism was mainly *** with commercial perlite,the adsorption removal rate of ni^(2+)and Cd^(2+)by enzymatic recovered perlite could reach 92.9%and 89.2%,respectively,and were improved by 12.63%and 13.03%.Langmuir isothermal adsorption model could better describe the isothermal adsorption process of recovered perlite on heavy metal ni^(2+)and Cd^(2+),and the relevant adsorption mechanism was mainly monolayer *** X-ray photoelectron spectroscopy(XPS)results indicated that the decrease of Si—O Si^(2+)hydroxyl coordination bond and the increase of C—Si bond might make the binding effect of recovered perlite with heavy metals *** competitive adsorption of ni^(2+)and Cd^(2+)by recovered perlite was still dominated by chemisorption and monolayer *** study was expected to provide a theoretical basis and technical support for the removal of ni^(2+)and Cd^(2+)from wastewater using recovered perlite from seaweed residue.

关键词： Agar extraction residue Recovered perlite Heavy metal ion Adsorption property

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近底层潮流速分布模式比较

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水科学进展 2010年第1期21卷 89-94页

作者：倪志辉宋志尧河海大学水文水资源与水利工程科学国家重点实验室江苏南京210098 重庆交通大学西南水运工程科学研究所重庆400016 南京师范大学虚拟地理环境教育部重点实验室江苏南京210097

考虑到潮流运动的非恒定性和非线性特征,基于潮流雷诺应力分布式,应用Prandtl混合长度和von Karman自相似理论,并结合潮流运动方程,推导了近底层潮流速垂向分布的双对数模式。然后,将该分布模式应用于英国大陆南部西Solent水道和江苏岸... 详细信息

考虑到潮流运动的非恒定性和非线性特征,基于潮流雷诺应力分布式,应用Prandtl混合长度和von Karman自相似理论,并结合潮流运动方程,推导了近底层潮流速垂向分布的双对数模式。然后,将该分布模式应用于英国大陆南部西Solent水道和江苏岸外西洋海域流速的实测资料,并与对数线性分布的计算成果相比较,获得了比较满意的结果。最后,对几种分布模式进行了讨论和比较,结果表明:在近岸水域采用对数或对数线性流速分布模式计算摩阻流速和粗糙高度往往会带来较大的偏差,双对数模式能使计算的结果更为合理。

关键词：潮流雷诺应力对数分布对数线性分布摩阻流速粗糙高度双对数分布

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Recent advances in Fe-N-C-and Co-N-C-based materials as bifunctional electrocatalysts for oxygen reduction and oxygen evolution

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Science China Chemistry 2024年第4期67卷 1137-1160页

作者： hui-Min Xu Hong-Rui Zhu Chen-Jin Huang zhi-Jie Zhang Ting-Yu Shuai Qi-ni Zhan Gao-Ren Li College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

Fe-nitrogen-carbon(Fe-N-C)-and Co-nitrogen-carbon(Co-N-C)-based electrocatalysts have been widely concerned because of their high OER/ORR activity,low metal cost,and simple *** exploration of Fe-N-C and Co-N-C single atombased catalysts with high activity and stability to overcome the slow kinetics of oxygen reduction and oxygen evolution reactions is also the key to the development of efficient electrolytic water,fuel cells,and rechargeable metal-air ***-N-C and Co-N-C single atom-based electrocatalysts have the advantages of a high utilization rate of metal atoms and high electrocatalytic activity,and are ideal catalysts for promoting electrochemical energy conversion and *** general principles of designing Fe-N-C and Co-N-C single atom-based electrocatalysts are reviewed in this ***,the strategies to improve the bifunctional catalytic activity and stability are ***,the challenges and prospects of Fe-N-C and Co-N-C single atom-based catalysts are well *** review will provide a reference for the directed optimization of Fe-N-C and Co-N-C single atom-based catalysts.

关键词： Fe-N-C Co-N-C single atom bifunctional oxygen electrocatalysts

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High-throughput and simultaneous inertial separation of tumor cells and clusters from malignant effusions using spiral-contraction-expansion channels

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Microsystems & Nanoengineering 2024年第2期10卷 91-99页

作者： zhixian Zhu hui Ren Dan Wu Zhonghua ni Nan Xiang School of Mechanical Engineering and Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical InstrumentsSoutheast University211189NanjingChina School of Mechanical Technology Wuxi Institute of TechnologyNo.1600 Gaolang West Road214129WuxiChina Department of Oncology Jiangyin People’s Hospital214400JiangyinChina

Tumor cell clusters are regarded as critical factors in cancer pathophysiology,and increasing evidence of their higher treatment resistance and metastasis compared to single tumor cells has been ***,existing cell separation methods that are designed for single tumor cells cannot be used to simultaneously purify tumor cell *** address this problem,we demonstrated a microfluidic approach for the high-throughput,continuous-flow ternary separation of single tumor cells,tumor cell clusters,and WBCs from clinical pleural or abdominal effusions by coupling slanted spiral channels and periodic contraction-expansion *** first systematically explored the influence of particle size and flow rate on particle *** separation performance indicated that 94.0%of WBCs were removed and more than 97%of MDA-MB-231 tumor cells were recovered at a high flow rate of 3500µL/***,more than 90%of tumor cell clusters were effectively preserved after ***,we successfully applied our device for the ternary separation of single tumor cells,tumor cell clusters,and WBCs from different malignant effusions collected from patients with metastatic ***,our spiral-contraction-expansion device has potential as a sample pretreatment tool for the cytological diagnosis of malignant effusions.

关键词： separation contraction removed

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A Modification to Vertical Distribution of Tidal Flow Reynolds Stress in Shallow Sea

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China Ocean Engineering 2012年第3期26卷 431-442页

作者：倪志辉宋志尧张绪进吴立春易静 Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education and National Engineering Research Center for Inland Waterway RegulationChongqing Jiaotong University Southwestern Research Institute of Water Transportation Engineering Chongqing Jiaotong University Key Lab of Virtual Geographic Environment under Ministry of Education and Jiangsu Key Lab for Numerical Simulation of Large-Scale Complex SystemNanjing Normal University Chongqing University of Education

Tidal flow is a periodic movement of unsteady and non-uniform, which has acceleration and deceleration process obviously, especially in coastal shallow waters. Many researches show that vertical distribution of tidal flow Reynolds stress deviated from linear distribution. The parabolic distribution of the tidal flow Reynolds stress was proposed by Song et al. （2009）. Although the model fills better with field observations and indoor experimental data, it has the lower truncated series expansion of tidal flow Reynolds stress, and the description of the distribution is not very comprehensive By introducing the motion equation of tidal flow and improving the parabolic distribution established by Song et al. （2009）, the cubic distribution of the tidal flow Reynolds stress is proposed. The cubic distribution is verified well by field data （Bowden and Fairbairn, 1952; Bowden et al., 1959; Rippeth et al., 2002） and experimental data （Anwar and Atkins, 1980）, is consistent with the numerical model results of Kuo et al. （1996）, and is compared with the parabolic distribution of the tidal flow Reynolds stress. It is shown that this cubic distribution is not only better than the parabolic distribution, but also can better reflect the basic features of Reynolds stress deviating from linear distribution downward with the tidal flow acceleration and upward with the tidal flow deceleration, for the foundation of further study on the velocity profile of tidal flow.

关键词： tidal flow Reynolds stress linear distribution parabolic distribution cubic distribution

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Antitumor Effect of Apcin on Endometrial Carcinoma via p21-Mediated Cell Cycle Arrest and Apoptosis

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Current Medical Science 2024年第3期44卷 623-632页

作者： Ke ni Zi-li LI zhi-yong HU Li HONG Department of Obstetrics and Gynecology Renmin Hospital of Wuhan UniversityWuhan430060China Institute of Reproductive Health Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

Objective Endometrial carcinoma(EC)is a prevalent gynecological malignancy characterized by increasing incidence and mortality *** underscores the critical need for novel therapeutic *** such potential target is cell division cycle 20(CDC20),which has been implicated in *** study investigated the effect of the CDC20 inhibitor Apcin on EC and elucidated the underlying mechanism *** The effects of Apcin on EC cell proliferation,apoptosis,and the cell cycle were evaluated using CCK8 assays and flow *** sequencing(RNA-seq)was subsequently conducted to explore the underlying molecular mechanism,and Western blotting and coimmunoprecipitation were subsequently performed to validate the *** studies were performed to evaluate the antitumor effects in *** analysis was also conducted to identify CDC20 as a potential therapeutic target in *** Treatment with Apcin inhibited proliferation and induced apoptosis in EC cells,resulting in cell cycle *** associated with apoptosis and the cell cycle were activated following treatment with ***,Apcin treatment led to the upregulation of the cell cycle regulator p21,which was verified to interact with CDC20 and consequently decrease the expression of downstream cyclins in EC *** vivo experiments confirmed that Apcin treatment significantly impeded tumor *** CDC20 expression was observed in EC tissue than in nonmalignant tissue,and increased CDC20 expression in EC patients was associated with shorter overall survival and progress free *** CDC20 is a novel molecular target in EC,and Apcin could be developed as a candidate antitumor drug for EC treatment.

关键词： endometrial carcinoma CDC20 apoptosis cell cycle arrest p21 BBC3

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近岸海域海面风速分布的预测方法研究

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空气动力学学报 2010年第5期28卷 547-552页

作者：倪志辉吴立春宋志尧重庆交通大学西南水运工程科学研究所重庆400016 重庆教育学院重庆400062 虚拟地理环境教育部重点实验室南京师范大学江苏南京210097

针对近岸海上风速观测比较困难,应用近岸海域流速垂直分布的理论模式和采用枚举法结合最小二乘法,通过实测流速分离,提出了一种新的近岸海面分速分布预测方法。并首先对实验室风生流实验和长江口北支河段的风速进行了检验性计算,获得了... 详细信息

针对近岸海上风速观测比较困难,应用近岸海域流速垂直分布的理论模式和采用枚举法结合最小二乘法,通过实测流速分离,提出了一种新的近岸海面分速分布预测方法。并首先对实验室风生流实验和长江口北支河段的风速进行了检验性计算,获得了比较满意的结果。然后应用于长江口南支河段及口外实测流速的分离,实测流速分离后,不仅可获得海面风流速,用于估算作用于海表面10m的风速数据,而且还可从中得到海表面的摩擦风速。据此,结合对数风速分布可以对海面低空的风速分布进行预测。初步研究表明,此方法原理简单、过程合理、结果可信,是一种适用于现场资料分析计算的有效方法。

关键词：近岸海域海面风速摩擦风速最小二乘法对数风速分布

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