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Pulsed dynamic electrolysis enhanced PeMWe hydrogen production:Revealing the effects of pulsed electric fields on protons mass transport and hydrogen bubble escape

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j.urnal of energy Chemistry 2025年第1期100卷 201-214页

作者： Xuewei Zhang Wei Zhou Yuming Huang Liang Xie Tonghui Li Huimin Kang Lij.e Wang Yang Yu Yani ding j.nfeng Li j.axiang Chen Miaoting Sun Shuo Cheng Xiaoxiao Meng j.hui Gao Guangbo Zhao School of energy Science and engineering Harbin Institute of Technology China Datang Technology Innovation Co. Ltd

The transition of hydrogen sourcing from carbon-intensive to water-based methodologies is underway,with renewable energy-powered proton exchange membrane water electrolysis （PeMWe） emerging as the preeminent pathway for hydrogen *** remarkable advancements in this field,confronting the sluggish electrochemical kinetics and inherent high-energy consumption arising from deteriorated mass transport within PeMWe systems remains a formidable *** impediment stems primarily from the hindered protons mass transfer and the untimely hydrogen bubbles *** address these challenges,we harness the inherent variability of electrical energy and introduce an innovative pulsed dynamic water electrolysis *** to constant voltage electrolysis (hydrogen production rate:51.6 m L h-1,energy consumption:5.37 kWh Nm-3H2),this strategy (hydrogen production rate:66 m L h-1,energy consumption:3.83 kWh Nm-3H2) increases the hydrogen production rate by approximately 27%and reduces the energy consumption by about 28%.Furthermore,we demonstrate the practicality of this system by integrating it with an off-grid photovoltaic （PV） system designed for outdoor operation,successfully driving a hydrogen production current of up to 500 mA under an average voltage of approximately 2 *** combined results of in-situ characterization and finite element analysis reveal the performance enhancement mechanism:pulsed dynamic electrolysis （PDe） dramatically accelerates the enrichment of protons at the electrode/solution interface and facilitates the release of bubbles on the electrode *** such,PDe-enhanced PeMWe represents a synergistic advancement,concurrently enhancing both the hydrogen generation reaction and associated transport *** promising technology not only redefines the landscape of electrolysis-based hydrogen production but also holds immense potential for broadening its application across a diverse spectrum of electrocatalytic endeavors.

关键词： electrolysis

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碳政策选择对网络外部性下低碳电商供应链的决策影响研究

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管理工程学报 2025年第2期39卷 105-117页

作者：王玉燕丁露萍山东财经大学管理科学与工程学院山东济南250014

低碳经济环境下,中小型制造商为了缓解碳减排资金压力,选择依托电商平台进行线上销售。基于由电商平台主导的低碳电商供应链系统,本文将产品的网络外部性纳入模型,构建了碳交易政策和碳税政策下的供应链决策模型,研究政府和低碳电商供... 详细信息

低碳经济环境下,中小型制造商为了缓解碳减排资金压力,选择依托电商平台进行线上销售。基于由电商平台主导的低碳电商供应链系统,本文将产品的网络外部性纳入模型,构建了碳交易政策和碳税政策下的供应链决策模型,研究政府和低碳电商供应链“共赢”的最佳碳政策。研究发现:(1)探讨各成员企业的最佳碳政策时,制造商的实际碳排放量与政府碳配额的大小关系是重要的影响因素。当实际碳排放量超过政府规定的碳配额时,若碳交易价格超过一个特定的阈值,碳交易政策的惩罚力度大于碳税政策,此时对于供应链成员和政府而言,实施碳税政策更有利;若碳交易价格小于该阈值,则反之。当实际碳排放量小于政府规定的碳配额时,对供应链成员和政府而言,碳交易政策是最佳碳政策。(2)产品的网络外部性对产品价格、市场需求和供应链成员的利润都有正向作用。这些结论为电商供应链成员在低碳背景下的决策提供了参考。

关键词：低碳电商供应链碳税碳交易政策网络外部性

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Vibration control of fluid-conveying pipes: a state-of-the-art review

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Applied Mathematics and Mechanics(english edition) 2023年第9期44卷 1423-1456页

作者： Hu ding j.C.j. Shanghai Key Laboratory of Mechanics in energy engineering School of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China Shaoxing Institute of Technology Shanghai UniversityShaoxing 312074Zhejiang ProvinceChina Shanghai Institute of Aircraft Mechanics and Control Shanghai 200092China School of Mechanical and Mechatronic engineering University of Technology SydneyNew South Wales 2007Australia

Fluid-conveying pipes are widely used to transfer bulk fluids from one point to another in many engineering *** are subj.ct to various excitations from the conveying fluids,the supporting structures,and the working environment,and thus are prone to vibrations such as flow-induced vibrations and acoustic-induced *** can generate variable dynamic stress and large deformation on fluid-conveying pipes,leading to vibration-induced fatigue and damage on the pipes,or even leading to failure of the entire piping system and catastrophic ***,the vibration control of fluid-conveying pipes is essential to ensure the integrity and safety of pipeline systems,and has attracted considerable attention from both researchers and *** present paper aims to provide an extensive review of the state-of-the-art research on the vibration control of fluid-conveying *** vibration analysis of fluid-conveying pipes is briefly discussed to show some key issues involved in the vibration ***,the research progress on the vibration control of fluid-conveying pipes is reviewed from four aspects in terms of passive control,active vibration control,semi-active vibration control,and structural optimization design for vibration ***,the main results of existing research on the vibration control of fluid-conveying pipes are summarized,and future promising research directions are recommended to address the current research *** paper contributes to the understanding of vibration control of fluid-conveying pipes,and will help the research work on the vibration control of fluidconveying pipes attract more attention.

关键词： fuid-conveying pipe vibration passive control nonlinear energy sink(NeS) active control semi-active control

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exact solution and transient behavior for torsional vibration of functionally graded finite hollow cylinders

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Acta Mechanica Sinica 2009年第4期25卷 555-563页

作者： H. M. Wang C. B. Liu H. j. ding Department of Mechanics Zhejiang University Department of Civil engineering Zhejiang University

exact solutions are obtained for transient torsio- nal responses of a finitely long, functionally graded hollow cylinder under three different end conditions, i.e. free-free, free-fixed and fixed-fixed. The cylinder with its external surface fixed is subj.cted to a dynamic shearing stress at the internal surface. The material properties are assumed to vary in the radial direction in a power law form, while keep invariant in the axial direction. With expansion in the axial direction in terms of trigonometric series, the governing equations for the unknown functions about the radial coordinate r and time t are deduced. By applying the variable substitution technique, the superposition method and the separation of variables consecutively, series-form solutions of the equations are obtained. Natural frequencies and the transient torsional responses are finally discussed for a functionally graded finite hollow cylinder.

关键词： exact solution Functionally graded material Finite hollow cylinder Transient torsional vibration

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Advancement in QDs for optoelectronic applications and beyond

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Nano Research 2024年第12期17卷 10426-10445页

作者： Memoona Qammar Max j.H.Tan Pengbo ding j.anchao Ge Yinthai Chan j.nathan e.Halpert Department of Chemistry Hong Kong University of Science and Technology(HKUST)Hong Kong 999077China Department of Chemistry Northwestern UniversityEvanstonIllinois 60208USA Cosmic Discovery Sdn Bhd 10 Jalan Wawasan 3/KU7Sungai Kapar Indah42200 KlangSelangorMalaysia

This review focuses on the history and current state of the art optoelectronic applications of quantum dots involving light *** focus mainly on three areas of commercial,or potential commercial interest,including quantum dot light emitting devices(QLeDs,sometimes called QD-LeDs),lasing applications,and quantum computing *** main connection between these areas is the development of the science and engineering needed to achieve electrical excitation of the quantum dot in an optoelectronic device in order to achieve emission with characteristics particularly suited to the application in *** to the special physics of quantum dots,these materials are particularly well suited for both existing commercial applications,and potentially for future applications,such as single photon sources,spin cubits,or polarized *** conclude with an analysis of the future prospects for these exciting *** 30 years of progress since the Nobel Prize winning work on monodisperse samples of QDs,our goal is to highlight the current start of the art,discuss the current issues for each technology,and suggest future goals for the next 30 years for quantum dot research.

关键词： quantum dots quantum confinement optoelectronic properties color purity lasing quantum coherence quantum computing

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Step it up: Advancing physical activity research to promote healthy aging in China

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j.urnal of Sport and Health Science 2016年第3期5卷 255-257,382页

作者： ding ding Hua Fu Adrian e.Bauman Prevention Research Collaboration Sydney School of Public Health The University of Sydney Centre for Chronic Disease Prevention College of Public Health Medical and Veterinary Sciences James Cook University School of Public Health Fudan University

*** China has been *** the late 1970s,China’s economy has increased many fold,the proportion of Chinese living in urban areas has more than doubled,life expectancy has increased by 10 years^1 and the country has transitioned from the'bicycle kingdom'to the world’s largest'auto market'.~2 As a result,China is now challenged by the'side effects'of eco-

关键词： doubled proportion lifestyle expenditure programs pragmatic innovative faster encourage accumulating

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effect of simulated dynamic intraocular pressure on retinal thickness measured by optical coherence tomography after cataract surgery

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International j.urnal of Ophthalmology(english edition) 2012年第6期5卷 687-693页

作者： ding Chen j.n Zhu j.n Li Xi-Xia ding Fan Lu Yun-e Zhao eye Hospital Wenzhou Medical College

AIM: To investigate the effect of simulated dynamic intraocular pressure (SDIOP) during uncomplicated phacoemulsification on postoperative macular and peripapillary retinal nerve fiber layer (RNFL) thickness. MeTHODS: Macular and RNFL thicknesses in one eye of patients (n=30) undergoing uncomplicated phacoemulsification were measured by optical coherence tomography preoperatively and 1 week postoperatively. The best-corrected visual acuity, SDIOP, irrigation time (IT), effective phacoemulsification lime, entire surgical duration, blood pressure, and heart rate were recorded. ReSULTS: The mean SDIOP and IT was (74.9 +/- 27.4)cmH(2)O and (178.4 +/- 21.6) seconds respectively. We divided our patients into two groups based upon IT with greater than 90cmH(2)O (P>90IT). In Group A (n= 14), the P>90IT was greater than the mean P>90IT, and in Group B (n=16), the P>90IT was less than the mean P>90IT. For all patients there was a significant increase in macular thickness one week after cataract surgery (P=0.001). While the RNFL thickness tended to increase, the change was not significant. The postoperative macular thickness of Group A,(277.8 +/- 13.7)mu m, was significantly thicker than that of Group B, (267.9 +/- 15.0)mu m (P=0.004). The postoperative peripapillary RNFL thickness of Group A, (96.8 +/- 10.8)mu m, was not significantly different from Group B. For Group A, the change in macular thickness was positively correlated with P>90IT (R-2=0.524, P =0.02). There was no statistical difference in postoperative visual acuity between Groups A and B. CONCLUSION: After uncomplicated phacoemulsification, increased macular thickness is associated with the IT under high SDIOP. The effect of high SDIOP is limited to the sub-clinical level.

关键词： intraocular pressure retina optical coherence tomography phacoemulsification

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Trees support functional soils in a dryland agricultural area

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Geography and Sustainability 2024年第4期5卷 588-596页

作者： j.ngyi ding David j.eldridge State Key Laboratory of earth Surface Processes and Resource ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Centre for ecosystem Science School of BiologicalEarth and Environmental SciencesUniversity of New South WalesSydneyNew South Wales 2052Australia

Trees provide multiple ecosystem services such as carbon sequestration,hydrological regulation and habitat for arboreal ***,they are often removed to support agricultural *** the importance of tree remnants,we know relatively little about how soils differ across sites of varying ***,we describe a study where we examined the relative effects of trees,compared with unvegetated interspaces,on soil functions in remnant patches at sites in good and poor condition in two eucalypt communities in an irrigation area in eastern *** found that,in general,carbon and nutrient cycling were relatively greater beneath trees,and in surface soils,but there were no clear trends in relation to site *** values of most soil attributes(e.g.,soluble and exchangeable cations,nitrogen,phosphorus)were greater beneath trees,indicating strong fertile island effects in both ***,our study confirms the importance of trees in remnant patches in agricultural landscapes,particularly those in sites of poor *** also suggests that soil processes may still be relatively intact,even in sites in poor *** study reinforces the need to protect trees in remnant woodland reserves to maintain critical ecosystem functions related to nutrient *** remnants are important for achieving sustainable management of agricultural systems.

关键词： Condition eucalyptus Fertile islands Soil function Trees Woodlands

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Possible effects of selecting different station distributions in the optimal sequence estimation method

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Geodesy and Geodynamics 2024年第6期15卷 554-567页

作者： Hao ding School of Geodesy and Geomatics Hubei Luojia LaboratoryWuhan UniversityWuhan 430079China

Since the inception of the optimal sequence estimation (OSe) method,various research teams have substantiated its efficacy as the optimal stacking technique for handling array data,leading to its successful application in numerous geoscience ***,concerns persist regarding the potential impact of aliasing resulting from the choice of distinct station distributions on the outcomes derived from *** this investigation,I employ theoretical deduction and experimental analysis to elucidate the reasons behind the immunity of the Y_(l'm')-related common signal obtained through OSe to variations in station distribution *** primary obj.ctive of OSe is also underscored,i.e.,to restore/strip a Y_(l'm')-related common periodic signal from various ***,I provide additional clarification that the‘Y_(l'm')-related common signal’and the‘Y_(l'm')-related equivalent excitation sequence’are distinct *** analyses will facilitate the utilization of the OSe technique by other researchers in investigating intriguing geophysical phenomena and attaining sound explanations.

关键词： Optimal sequence estimation Station selection GPS

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effects of effluent organic matters on endocrine disrupting chemical removal by ultrafiltration and ozonation in synthetic secondary effluent

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j.urnal of environmental Sciences 2019年第2期31卷 57-64页

作者： Xiurong Si Zunfang Hu ding ding Xu Fu Civil engineering Department North China Institute of Aerospace Engineering Shandong Institute of Geophysical and Geochemical exploration

endocrine disrupting chemicals(eDCs) in the secondary effluent discharged from wastewater treatment plants are of great concern when water reuse is intended. Ozonation and ultrafiltration(UF) are powerful technologies reported to eliminate eDCs. Due to the importance of effluent organic matters(efOMs) in secondary effluent, the effects of three kinds of efOM on the treatment of five eDCs using ozonation and UF were investigated. The three kinds of efOM studied were humic acid sodium salt(NaAH), bovine serum albumin(BSA)and sodium alginate(NaAg); and the five eDCs were estrone, 17β-estradiol, estriol, 17α-ethynyl estradiol and bisphenol A. The results showed that efOM accelerated the decay rate of ozone and inhibited the degradation efficiency of eDCs by ozonation in the order NaAH > BSA > *** ultraviolet absorbance at 280 nm(UVA_(280)) has potential for use as a surrogate indicator to assess eDC removal via ozonation without conducting difficult eDC analyses. When the decline in UVA_(280) exceeded 18%, the five eDCs had been completely removed. The UF behavior of NaAH,BSA and NaAg was found to follow the cake filtration law. The fouling potential of efOM followed the order NaAg > NaAH > BSA; while efOM on the membrane surface enhanced eDC removal in the order NaAH > BSA > NaAg. The mean retention rate of the membrane was increased by 24%, 10% and 8%, respectively. The properties of eDCs and efOM cakes both influenced the eDC removal rates due to adsorption, size exclusion and charge attraction.

关键词： endocrine disrupting chemicals Ultrafiltration Ozonation effluent organic matters Secondary effluent

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