Wanzhen Luo

Sun Yat-sen University

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i-10 index

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Rui Deng

Peking University

Wu Tiecheng

Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)

Tiecheng Wu

Sun Yat-sen University

Dapeng Jiang

Shanghai Institute of Ceramics

Zezhen Zhang

Wuhan University of Technology

Fuzhen Pang

Harbin Engineering University

Chunyu Guo

Harbin Engineering University

Pei Xu

Jiangsu University

Defen Wang

Shaanxi Provincial Hospital of Traditional Chinese Medicine

Chunhui Wang

Harbin Engineering University

Cooperative Institutions

Sun Yat-sen University

Harbin Engineering University

Chinese Academy of Sciences

Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)

Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)

Peking University

Chinese Academy of Medical Sciences & Peking Union Medical College

Zhejiang University

University of Chinese Academy of Sciences

Shanghai Jiao Tong University

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Economic burden attributable to healthcare-associated infections at western China hospitals: 6 Year, prospective cohort study

Journal of Infection (2023)

Yu Lv Xiaobo Huang Jiayu Wu Xueqin Xiao Chunhua Ma

Healthcare-associated infections (HAIs) represent a major threat to patient safety and are associated with significant economic burden. Calculating the costs attributable to HAIs is challenging given the various sources of bias. Although HAIs as a reasonably preventable medical harm should have been closely linked to medical insurance incentives, there was little linkage between HAIs and medicare in western China owing to the lack of economic evaluation data. The present study aimed to generate estimates of the attributable costs associated with HAIs and the magnitude of costs growth.

10.1016/j.jinf.2023.12.008

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Citations (1)

REMOVED: Investigating the sound power level of a simplified underwater vehicle induced by flow separation

Ocean Engineering (2020)

Rui Deng Zezhen Zhang Fuzhen Pang Wu Tiecheng Wanzhen Luo

Separation (statistics)

10.1016/j.oceaneng.2020.107286

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Citations (5)

Numerical Study on Wave-Ice Interaction in the Marginal Ice Zone

Journal of Marine Science and Engineering (2020)

Tiecheng Wu Wanzhen Luo Dapeng Jiang Rui Deng Shuo Huang

The effect of waves on ice sheet is critical in the marginal ice zone (MIZ). Waves break large sea ice into small pieces and cause them to collide with each other. Simultaneously, the interaction between sea ice and waves attenuates these waves. In this study, a numerical research is conducted based on a computational fluid dynamics (CFD) method to investigate the response of single ice floe to wave action. The obtained results demonstrate that the sea ice has a violent six degree of freedom (6DoF) motion in waves. Ice floes with different sizes, thicknesses, and shapes exhibit different 6DoF motions under the action of waves. The heave and surge response amplitude operator (RAO) of the sea ice are related to wavelength. Furthermore, the overwash phenomenon can be observed in the simulation. The obtained results are compared with the model test in the towing tank based on artificial ice, and they agree well with test results.

Pancake ice

Lead (geology)

Fast ice

Towing

10.3390/jmse9010004

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Citations (9)

Experimental Study on the Influence of Bulbous Bow Form on the Velocity Field around the Bow of a Trimaran Using Towed Underwater 2D-3C SPIV

Journal of Marine Science and Engineering (2021)

Rui Deng Shigang Wang Wanzhen Luo Tiecheng Wu

In this study, particle image velocimetry was applied to measure the flow field around the bow region of a trimaran with different appendages. The dimensionless axial velocity u/U in test planes 1 and 2 of the testing model was measured by using a towed underwater stereoscopic particle image velocimetry (SPIV) system. Based on the measured flow field data, the local sinkage values in test planes 1 and 2 of the testing model with different appendages at speeds of 1.766 and 2.943 m/s were presented. In addition, the effects of speed, bulbous bow type, T foils, and bow wave on the axial velocity u/U were studied in detail. The acquired experimental data help in understanding the distribution of the flow field around the ship bow, and the data can also act as a reference to verify computational fluid dynamics (CFD) results.

Appendage

Particle tracking velocimetry

Velocimetry

10.3390/jmse9080905

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Citations (4)

Comparative Study on Hydrodynamic Characteristics of Under-Water Vehicles Near Free Surface and Near Ice Surface

Journal of Marine Science and Engineering (2024)

Pei Xu Jixiang Chen Yingchun Guo Wanzhen Luo

In this paper, the commercial computational fluid dynamics software STAR-CCM+ (18.04.008-R8) is utilized to analyze the hydrodynamic performance of BB2 underwater vehicles under various navigation conditions, as well as the flow field disturbances caused by the free surface and ice surface during navigation. After dividing the computational domains based on different navigation scenarios, numerical simulations are conducted for BB2 underwater vehicles (without a propeller) at infinite depth, near the free surface, and near the ice surface under various operating conditions. The analysis focuses on changes in resistance, velocity fields, and pressure fields of the BB2 at different velocities and navigation depths, followed by a comparison of the navigation differences of BB2 vehicles under varying operating conditions. Furthermore, to simulate realistic navigation conditions for underwater vehicles, numerical simulations are performed for BB2 underwater vehicles equipped with a propeller under different operating conditions. The results indicate that both the free surface and ice surface significantly influence the resistance, velocity field, and pressure field of the BB2. When the navigation depth exceeds 2D, the impact of ice on the vehicle can be nearly disregarded, and when the navigation depth exceeds 3D, the influence of the free surface on the vehicle can also be considered negligible.

Free surface

10.3390/jmse12122131

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Citations (0)

Experimental Study of Sea Ice Motion in Waves

Journal of Cold Regions Engineering (2020)

Chunhui Wang Miaoyan Song Chunyu Guo Shuai Wang Taiping Tian

To better understand the interactions between ships and ice, analyze ice–ice collisions, and provide parameters for the design of ships and offshore structures, it is important to study the interaction between ice and waves. Understanding these interactions is crucial to the analysis of collision velocity and impact during ship–ice interactions. In this study, experiments were carried out focusing on factors that influence sea ice motion using a motion tracking system in a towing tank. Two conditions, a fixed wave height and a fixed wave steepness, were considered in examining the motion of synthetic ice models with various shapes, lengths, and thicknesses; analyzing changes in the surge, the heave amplitudes, and the drift velocity; and calculating the kinematic energy involved. The results demonstrate that the shape, length, and thickness of ice blocks, as well as the water wavelength, affect surge and heave. The wavelength and ice thickness were found to be the most important factors. Characterization of the kinematic energy acquired by the ice model was also carried out.

Towing

Fast ice

10.1061/(asce)cr.1943-5495.0000214

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Citations (8)

Leaf photosynthetic plasticity does not predict biomass responses to growth irradiance in rice

Physiologia Plantarum (2021)

Lin Chen Wanzhen Luo Jianliang Huang Shaobing Peng Dongliang Xiong

Abstract Phenotypic plasticity, the capacity of an organism to generate alternative phenotypes in response to different environments, is a particularly important characteristic to enable sessile plants to adapt to rapid changes in their surroundings. Leaf anatomical and physiological traits exhibit plasticity in response to growth irradiances, but it is relatively unclear if the plasticity varies among genotypes for a species. Equally importantly, empirical results on how leaf‐level plasticity influences whole‐plant growth are largely absent. We conducted an integrated investigation into the light‐introduced plasticity by measuring 48 traits involving plant growth, leaf anatomy, leaf biochemistry, and leaf physiology of five rice genotypes grown under two irradiances. More than half of the estimated traits were significantly affected by growth light intensities, and the sizes of the cumulative effect of growth light ranged from −25.04% (stomatal conductance at high measurement light) to 135.2% (tiller number). Growth irradiance levels dramatically shifted the relationship between photosynthetic rate and stomatal conductance. However, the relationship between photosynthetic rate and mesophyll conductance was rarely influenced by growth light levels. Importantly, the present study highlights the significant variation in trait plasticity across rice genotypes and that the light‐introduced biomass changes were rarely predicted by leaf photosynthetic plasticity. Our findings imply that the genotypes with high productivity at the low growth light conditions do not necessarily have high productivity under high light conditions.

Stomatal Conductance

Light intensity

Tiller (botany)

Photosynthetic capacity

10.1111/ppl.13564

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Citations (8)

Removal notice to: ’Investigating the sound power level of a simplified underwater vehicle induced by flow separation’ [OE 204 (2020) 107286]

Ocean Engineering (2020)

Rui Deng Zezhen Zhang Fuzhen Pang Wu Tiecheng Wanzhen Luo

Separation (statistics)

10.1016/j.oceaneng.2020.108061