Pengfei Sun

Decoupling Energy Demand from Boron Compliance in Seawater Desalination via a Hybrid Single-Pass Multistage (HSPM) System

Likun Ma, Pengfei Sun, Yuling Deng, Zhiyang Zhu et autres

Achieving stringent boron compliance in seawater desalination has long depended on energy-intensive multipass reverse osmosis (RO) with alkaline dosing, creating a trade-off between energy consumption and water quality. This work breaks this bottleneck by developing a hybrid single-pass multistage (HSPM) system with …

cn (code pays fourni par la source)

An area-based model for estimating vitrinite reflectance of micro-sized particles

Pengfei Sun, Yanwei Bi, Hongbiao Wang, Chunlong Liu et autres

Tuning Structure and Selectivity of Thin-Film Composite Membranes via Ex Situ Generated Nanobubbles

Pengfei Sun, Zimou Feng, Fengxian Xu, Xing Wang et autres

Nanobubbles (NBs) play a critical role in tailoring polyamide (PA) morphology and optimizing membrane separation performance. However, conventional in situ generated NBs during interfacial polymerization reactions suffer from uncontrolled size distribution and undesirable interference with heat and mass transfer, which complicates their …

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Biofouling mitigation in cathodic electrochemical filtration via combined sublethal oxidative stress and electrostatic repulsion

Jeong Hoon Lee, Han-Shin Kim, Eun-Tae Yun, So-Young Ham et autres

kr, de, cn (code pays fourni par la source)

Energy-Efficient Trajectory Optimization of Freight Train on Steep Gradients with Dynamic Programming

Qiangqiang Liu, Xiaoyun Feng, Juxia Ding, Yu Rao et autres

Most existing research on energy-efficient train control assumes that railway tracks are predominantly flat or feature only gentle gradients. However, in real-world scenarios—particularly on China's railways, trains frequently traverse steep uphill and downhill gradients. On steep gradients, maintaining a constant train speed …

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Direct effects of interlayer on organic micropollutants removal by thin-film nanocomposite membranes

Wenyu Liu, Chenyue Wu, Pulak Sarkar, Hao Guo et autres

hk, cn (code pays fourni par la source)

Optimal Eco-Driving Strategy for Trains Considering Dynamic Losses

Qingyuan Wang, Shiqi Li, Pengfei Sun, Chengcheng Fu

This paper focuses on developing a mathematical framework for optimal control problems in train systems by accounting for dynamic losses in the traction transmission system. Unlike conventional approaches that rely on simplistic static loss assumptions, our formulation incorporates dynamic losses to provide …

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Energy-Saving Optimization of Metro Train with Bidirectional Converter Substation

Chengcheng Fu, Yang Zhu, Pengfei Sun, Qingyuan Wang et autres

The operation energy consumption of urban rail transit has attracted much attention, and the use of bidirectional converter substations (BCS) and the optimization of train driving strategies are effective ways to reduce energy consumption. This paper proposes the power supply-train operation coupling …

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Analysis of the influence of high-speed dynamic mechanical characteristics based on tire unevenness

Pengfei Sun, Kejie Luo, Shuiting Zhou, Rui Mao et autres

To investigate the influence of tire non-uniformity on the mechanical performance of radial tires, a simulation study was conducted to analyze the non-uniformity caused by the overlapping treatment at the interface regions during the manufacturing process. In this study, considering the manufacturing …

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Microscopic Structural Evolution of Deep-Sea Sediments During Shear Processes

Zhiyong Xu, Haining Lu, Jianmin Yang, Pengfei Sun

Abstract The microscopic structural characteristics of deep-sea sediments play a significant role in determining their macroscopic mechanical behavior. Particularly under shear processes, the evolution of microscopic structures is crucial for understanding the mechanical response and engineering applicability of deep-sea sediments. This study …

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Numerical and experimental investigation of the coupling effect of double plume discharge sources in deep-sea mining

Shihang Liu, Jianmin Yang, Haining Lu, Zhongqin Lin et autres

cn (code pays fourni par la source)

Iron promotes periphytic biofilm accumulation of ammonia nitrogen in paddy ecosystems

Jing Tao, Pengfei Sun, Yonghong Wu

微生物介导铁氧化还原耦合氮循环过程在土壤中十分普遍，周丛生物作为稻田土水界面上的微生物聚集体，能富集环境中的铁、氮等元素以满足自身生长代谢，而目前仍不清楚周丛生物中的铁是否会影响其对氮的富集和转化。因此，本研究从化学和生物学角度解析了Fe(Ⅲ)影响下的周丛生物氮周转情况。研究结果表明，Fe(Ⅲ)可通过三种途径促进周丛生物对NH4+-N的积累：1）表面铁氧化物为NH4+提供了更多的吸附位点；2）Fe(Ⅲ)改变了周丛生物群落结构进而降低了氨氧化功能基因amoA/B/C的丰度从而抑制了周丛生物氨氧化过程；3）增加异化硝酸盐还原产铵(DNRA)的nirB基因、同化硝酸盐还原产铵(ANRA)的nasA基因丰度从而促进NO3--N的还原和NH4+-N的产生。本研究发现铁元素在减少周丛生物NO3--N流失的同时也降低了N2O排放，为利用周丛生物控制稻田氮流失，调整施肥策略提供了新的见解。