Changming Yang

Xi'an Jiaotong University

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Yulai Wang

Jilin Agricultural Science and Technology University

Jianhua Li

Tongji University

Zhu Ouyang

Institute of Geographic Sciences and Natural Resources Research

Ziad El Rassi

Oklahoma State University

Linzhang Yang

Jiangsu Academy of Agricultural Sciences

Mengmeng Wang

Tongji University

Shuo Shen

Qinghai University

Shu‐Hui Hung

National Taiwan University Hospital

Yachao Jing

Tongji University

Yunyun Hu

Anhui University of Technology

Cooperative Institutions

Tongji University

Chinese Academy of Sciences

University of Chinese Academy of Sciences

State Key Laboratory of Pollution Control and Resource Reuse

Zhejiang University

Huazhong University of Science and Technology

Peking University

Body Organ Biomedical (Taiwan)

Anhui University of Technology

Shanghai Jiao Tong University

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Effects of fine bubble aeration at the sediment‒water interface on distributions of organic phosphorus fractions and related microbial activity in a heavily urban river

Journal of Soils and Sediments (2021)

Changming Yang Xiazhi Chen Xu Yunqi Yulai Wang

10.1007/s11368-021-03019-5

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Citations (1)

Numerical Computation of Three Dimensional Viscous Flow of Axial Flow Runner

Journal of Sichuan University (2006)

Changming Yang Chen Ci-chang

In order to enhance design accuracy and performance,three dimensional viscous flow inside axial flow runner is simulated based on time averaged Navier-Stokes equations,standard k-e turbulence model,and SIMPLEC algorithm.Predicted efficiency of axial flow runner is obtained according to computational approach of hydraulic loss.distribution pattern of flow fields in axial flow runner obtained by the simulation can be used to understand true flow phenomena and improve design,and established pressure variation curve in wrapping angle of blade.

Axial Compressor

Flow coefficient

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Studies on Coordination of Soil Phosphorus Supply with Photosynthesis of Rice under Different Nutrient Treatments

Journal of Plant Nutrition (2004)

Changming Yang Linzhang Yang Zhu Ouyang Toshiaki Tadano

Abstract A 4-year field experiment was conducted from 1999 to 2002 to study coordination of soil phosphorus (P) supply with rice (Orzya sativa L.) leaf photosynthesis. Dynamics of soil Olsen P and photosynthetic rate of rice plants were compared among different nutrient treatments. Possible mechanisms were tested by contrasting and analyzing the effectiveness of nutrient treatments on phosphorus absorption, root morphology and root surface phosphatase activity (RSPA). Treatments were four nutrient regimes: (i) control (CK), (ii) exclusively chemical fertilizers (CF), (iii) integration of farmyard manure (FYM) with chemical fertilizers (CM), and (iv) combined application of chemical fertilizers and wheat straw (CS). Results indicated that the combined application of chemical fertilizers and farmyard manure could markedly increase soil Olsen-P at the middle-latter growth stage and the extent to which soil Olsen-P was related with leaf photosynthesis was greatest after booting of rice (R 2 = 0.9083, P < 0.01). The integration of inorganic with organic nutrient source, especially FYM also increased RSPA and improved root morphology at the middle-latter growth stage. This ultimately resulted in a greater proportion of phosphorus taken up by rice plant and higher photosynthetic rate during the filling stage, compared to exclusively chemical fertilizers. As a result, the grain yield for the integrated nutrient treatments with FYM significantly increased compared to the exclusively chemical fertilization treatment. Keywords: Anthropogenic soilFarmyard manureOlsen PPhotosynthesisRiceRoot surface phosphatase activitySoil phosphorus availability Acknowledgments This study was financially supported by National Key Project (No. 1999011802) and Chinese Academy of Sciences (KZCX2-413). The authors would like to thank the Changshu Agroecological Experiment Station (CAES), Chinese Academy of Sciences (CAS) for providing experiment site and assistance. I am grateful to Dr Toshiaki Tadano for constructive suggestions and revisions.

10.1081/pln-200026408

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A visualization study of a confined vapor chamber with conical microstructure applied in data centres

IOP Conference Series Earth and Environmental Science (2024)

Yijia Liu Siyu Qin Changming Yang Xiangzhao Meng Chun Yang

Abstract With the development of the informatization technology, the scale of the data centre is expanding rapidly. The energy consumptions of the electronic equipment in the data centre are rising regularly, which lead to the thermal management becoming an argent issue to be settled. To realize the sustainable development of green data centre, the passive two-phase vapor chamber (VC) has turned into the focus of electronic cooling research. Constructing nucleation induced structures on the evaporation surface is an effective method to improve the performance of the vapor chamber. To address the problem of achieving enhanced boiling, a novel conical microstructure was designed in the vapor chamber with 50 mm height. The conical structure of 1 mm axial height was fabricated on the evaporation surface by computer numerical control (CNC) machining technology. A visualization experimental system was developed to investigate the effect of the conical microstructure on the two-phase behaviours, and the boiling heat transfer characteristics under different heating conditions ( Q in = 35 W, 50 W, 65 W) in a confined vapor chamber. The high-speed camera was used to capture the bubble behaviours. Experimental results found that compared with the smooth surface, the integration of the conical structure increasing the number of bubble nucleation sites and the bubble departure frequency. The bubble growth period at stable heating stage is 162 ms shorter than initial heating stage on the evaporation surface with conical structure. The thermal resistance ( R vc ) of vapor chamber with conical structure is improved by 5.85% compared to the smooth one at Q in = 65 W, which indicate that the conical microstructure can enhance the boiling heat transfer performance. This study aims to provide a reference for the design of thermal management system for green data centre.

10.1088/1755-1315/1372/1/012085

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Visualization study of co-existing boiling and condensation heat transfer in a confined flat thermosyphon

Energy (2023)

Siyu Qin Yijia Liu Changming Yang Liwen Jin Chun Yang

Thermosiphon

Boiling Heat Transfer

10.1016/j.energy.2023.129392

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Citations (7)

RESEARCH ON SURVEY AND ASSESSMENT OF THE CONDITIONS AFFECTING ARSENIC ADSORPTION AND REMOVAL BY STEEL SLAG IN WATER

Vietnam Journal of Marine Science and Technology (2015)

Trần Thị Thu Trang Changming Yang Shuo Shen Le Minh Hiep

This paper presents the results of this research which utilizes solid waste resources in the environment, namely steel slag, to adsorp and remove arsenic in water. The study conducted empirical processes based on the processes in the experimental conditions affecting arsenic adsorption and removal by steel slag in contaminated water: concentration, steel slag size, steel slag weight, pollution concentration, temperature, symbiotic ions. The research results show: The lower initial solution concentration is, the more easily adsorption equilibrium can achieve, the higher initial concentration is, the longer it takes to reach adsorption equilibrium; the smaller steel slag particle is, the more easily adsorption equilibrium can reach; the larger particle size, the longer the time to reach adsorption equilibrium; the more increasing the number of steel slag particles, the greater the pollutant adsorption, the higher the removal efficiency; initial pH concentration affects As adsorption of steel slag (III); influence of temperature on As adsorption of steel slag (III) is not clear; different ions (NO3-, Cl‑, F-, SO42- and PO43-) intervene in As adsorption of steel slag (III) in solution. Thus, the choice of steel slag as the material to adsorb and remove arsenic in water is the optimal method, bringing economic efficiency, environmental protection and practical application.

Slag (welding)

Particle (ecology)

10.15625/1859-3097/15/3/7224

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关于《中国药典》2015年版中成药剂量的分析和思考

中草药 (2019)

Ping Yang 阳长明林丹郑天骄王玲玲

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Effects of land use and land cover change on soil erosion potential in Berhe district: a case study of Legedadi watershed, Ethiopia

International Journal of River Basin Management (2020)

Mehari Mariye Melesse Mariyo Changming Yang Zebene Lakew Teffera Brhane Weldegebrial

This research was done in Legedadi watershed since the area was highly susceptible to soil erosion problem that could be aggravated by heavy rainfall, and steep slope. The aim of the present study was to examine the impact of LULC change on soil erosion potential in Legedadi watershed, and its implication on sedimentation problems. Multi-temporal Landsat imagery of TM (1985), TM (1997) and ETM+ (2013) were deployed to categorize a LULC map of the study watershed. Soil erosion risk was calculated by using GIS and RUSLE. Digital image processing and classification technique have been done using ERDAS Imagine 9. 2. Results indicate that there was a continuous and active LULC change observed in the watershed for the last 28 years. The settlement area and cultivated land were increased by 14.34% and 18.3%, whereas grazing land and bare land classes were reduced continuously by 25.74% and 18.47% between (1985–2103) respectively. The estimated annual soil losses were 0.0-330 t ha−1year−1in 2013 whereas in 1997 its range was 0-257.1 t ha−1year−1. A mean annual soil loss in the watershed was 54.19 t ha−1year−1 in 1997and 66.21 t ha−1year−1 in 2013, respectively. The average annual soil loss from each sub-watershed ranges from 34.57–89.19 t ha−1year−1. This calls for the coordinated action of the local communities and government in ensuring sustainable natural resource conservation systems considering the Climate Resilient Green Economy strategy of Ethiopia.

Land Cover

10.1080/15715124.2020.1767636

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Citations (33)

The Study of Parametric Modeling and Finite Element Analysis System of Skirt Support

Advances in intelligent and soft computing (2012)

Liu Su Changming Yang

Parametric design

Parametric model

Secondary development

10.1007/978-3-642-28314-7_57

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