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Variation of freshwater components in the Canada Basin during 1967–2010

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Acta Oceanologica Sinica 2014年第6期33卷 40-45页

作者： PAN Hong CHEN Min TONG Jinlu QIU Yusheng ZHENG minfang CAO Jianping College of Ocean and Earth Sciences Xiamen University State Key Laboratory of Marine Environmental Science Xiamen University

As a conservative tracer, oxygen isotopes in seawater are widely used for water mass analysis, along with temperature and salinity. In this study, seawater oxygen-18 datasets in the Canada Basin during 1967-2010 were obtained from the four cruises of the Chinese National Arctic Research Expedition （1999, 2003, 2008, and 2010） and the NASA database. Fractions of sea ice meltwater and river runoffwere determined from the salinity-5180 system. Our results showed that the river runoff decreased from the south to the north in the Canada Basin. The enhanced amount of river runoff observed in the southern Canada Basin may originate from the Mackenzie River, transported by the Beaufort Gyre. The river runoff component showed maximum fractions during 1967-1969, 1978-1979, 1984-1985, 1993-1994, and 2008-2010, indicating the refresh time of the river runoffwas 5.0-16.0 a in the Canada Basin. The temporal variation of the river runoffwas related to the change of the Arctic Oscillation （AO） index, suggesting the freshwater stored in the Canada Basin was affected by surface sea ice drift and water mass movement driven by atmospheric circulation.

关键词： Canada Basin freshwater river runoff sea ice meltwater oxygen isotope

Split-order consolidation optimization for online supermarkets:Process analysis and optimization models

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Frontiers of Engineering Management 2023年第3期10卷 499-516页

作者： minfang HUANG Yuanyuan HAO Yanxin WANG Xiangpei HU Ludi LI School of Economics and Management North China Electric Power UniversityBeijing 102206China Business College Beijing Union UniversityBeijing 100025China Institute of Systems Engineering Dalian University of TechnologyDalian 116024China

The large-scale online supermarket is a newly emerging online retailing mode which brings great convenience to *** supermarkets are characterized by having large amounts of daily orders with potentially multiple items,diverse delivery times,and a high order-split *** shipments for one order caused by order splitting result in high cost and disturbance and a large number of discarded consumable packages at online retailers and customers,causing severe damage to the ***,research on split-order consolidation fulfilment is critical for the advancement of the practice and theory in the context of highly complex online *** paper first analyzes the characteristics and the challenges associated with the split-order consolidation problem that online supermarket is confronting and summarizes the new operational process of split-order consolidation ***,a time–space network optimization model is built,and its corresponding solution algorithm is presented to solve the questions of where and when to consolidate the split ***,the computation results of the numerical experiments are provided to verify the effectiveness of the algorithm,and a sensitivity analysis of the relevant parameters is *** work highlights the effect of order consolidation processes and fulfilment methods on the order fulfilment decision-making for online *** purpose of this article is to help pave the way for more effective online supermarket management and order implementation.

关键词： online supermarkets split-order consolidation time–space network genetic algorithm

In vitro and in vivo biocompatibility of Mg–Zn–Ca alloy operative clip

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Bioactive Materials 2019年第1期4卷 236-244页

作者： Pengfei Ding Yuanchao Liu Xianghui He Debao Liu minfang Chen School of Materials Science and Engineering Tianjin University of TechnologyTianjin300384China Tianjin Medical University General Hospital Department of General SurgeryTianjin300384300070China National Demonstration Center for Experimental Function Materials Education Tianjin University of TechnologyTianjin300384China Tianjin Key Laboratory for Photoelectric Materials and Devices Tianjin300384China

At present,titanium(Ti)and its alloys are most commonly use in hemostasis clip clinical ***,the Ti Clip cannot be absorbed in human body and produce artifacts on computed tomography(CT),and induce clinically relevant hypersensitivity in *** order to overcome the drawbacks of the non-degradable Ti clips,an Mg-Zn-Ca alloy operative clip was fabricated by combining hot extrusion and blanking *** vitro and in vivo biocompatibility of Mg-Zn-Ca alloy operative clip were evaluated by L-929 Cells and SD rat model *** was found that Mg-Zn-Ca alloy exhibited non-cytotoxic to L929 *** vivo implantation showed that the newly designed Mg-Zn-Ca clip can successfully ligated carotid artery and no blood leakage occurred *** the period of the clip degradation,a small amount of H2 gas formation and no tissue inflammation around the clips were *** degradation rate of the clip near the heart ligated the arteries faster than that of clip far away the heart due do the effect of arterial *** analysis and various blood biochemical parameters in rat serum samples collected at different times after clip implantation showed no tissue inflammation around the clips.

关键词： Mg-Zn-Ca alloy Biodegradable hemostatic clip In vitro and in vivo biocompatibility Carotid artery

Engineering crystal phase of polytypic CuInS2 nanosheets for enhanced photocatalytic and photoelectrochemical performance

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Nano Research 2020年第2期13卷 583-590页

作者： He Li Wenjiang Li Wei Li minfang Chen Rony Snyders Carla Bittencourt Zhihao Yuan Key Iaboratory of Display Materials C Photoelectric Devices School of Materials Science and Engineering Tianjin University of TechnologyTianjin 300384China Chimie des Interactions Plasma-Surface University of Mons(UMONS)20 Place du Parc7000 MonsBelgium Materia Nova Research Centre 1 Avenue Nicolas CopernicB 7000 MonsBelgium

Crystal phase engineering on CulnS2(CIS)nanocrystals,especially polytypic structure,has become one of the research hotspots to design the advanced materials and devices for energy conversion and environment ***,the polytypic CIS nanosheets(NSs)including zincblende/wutzite and chalcopyrite/wurtzite types were first time achieved in a hot-injection system using oleic acid and liquid paraffin as the reaction ***-obtained polytypic CIS NSs exhibit significantly enhanced light-absorption abillty and visible-light-driven photocatalytic performance originating from the rational hetero-crystalline interfaces and surface defect states,which efficiently inhibit the recombination of photo-generated ***,the polytypic CIS NSs were spin-coated onto the surface of fluorinated-tin oxide glass substrate and used as the photoelectrode,which shows an excellent photoelectrochemical(PEC)activity in aqueous *** present work not only provides a facile,rapid,low-cost,and environmental-friendly synthesis strategy to design the crystal phase and defect structure of ternary chalcogenides,but also demonstrates the relationships between the polytypic structure and photocatalytic/photoelectrochemical properties.

关键词： CuInS2 polytypic defect hot injection photocatalytic photoelectrochemical activity

Electrochemical property of multi-layer anode supported solid oxide fuel cell fabricated through sequential tape-casting and co-firing

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Journal of Materials Science & Technology 2019年第4期35卷 695-701页

作者： Xiaoyang Chen Weijie Ni Xiaojia Du Zaihong Sun Tenglong Zhu Qin Zhong minfang Han School of Chemical Engineering Nanjing University of Science and Technology Suzhou Huatsing Jingkun New Energy Technology Co. Ltd. State Key Laboratory of Power Systems Department of Energy and Power EngineeringTsinghua University

In this work, a multi-layer anode supported solid oxide fuel cell(SOFC) is designed and successfully prepared through sequential tape casting and co-firing. The single cell is consisted of NiO-3 YSZ(3 YSZ: 3 mol.% yttria doped zirconia) anode support, NiO-8 YSZ(8 YSZ: 8 mol.% yttria stabilized zirconia) anode functional layer, dense 8 YSZ electrolyte layer, and porous 3 YSZ cathode scaffold layer with infiltrated La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) cathode. The clear interfaces and good contacts between each layer, without element inter-diffusion being observed, suggest that this sequential tape casting and co-firing is a feasible and successful route for anode supported single cell fabrication. This cell exhibits remarkable high open circuit voltage of 1.097 V at 800?C under room temperature humidified hydrogen, with highly dense and gastight electrolyte layer. It provides a power density of 360 mW/cm^2 under operation voltage of0.75 V at 800?C and a stable operation of ～110 h at 750?C under current density of-300 mA/cm^2. Furthermore, this cell also presents encouraging electrochemical responses under various anode hydrogen partial pressures and maintains high power output at low fuel concentrations.

关键词： Anode supported SOFC Sequential tape casting Co-firing Cathode infiltration

Occurrence, thermal evolution and primary migration processes derived from studies of organic matter in the Lucaogou source rock at the southern margin of the Junggar Basin, NW China

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Science China Earth Sciences 2007年第z2期50卷 114-123页

作者： JIAO yangQuan WU LiQun HE MouChun ROGER Mason WANG minfang XU ZhiCheng Faculty of Earth Resources China University of Geosciences Wuhan 430074 China Faculty of Earth Resources China University of Geosciences Wuhan 430074 China Faculty of Earth Resources China University of Geosciences Wuhan 430074 China Faculty of Earth Sciences China University of Geosciences Wuhan 430074 China Faculty of Earth Resources China University of Geosciences Wuhan 430074 China Hangzhou Institute of Petroleum Geology Hangzhou 310023 China

The Lucaogou Formation carbonate-rich oil shale source rock is exposed at the southern margin of the Junggar Basin, Xinjiang, NW China. We have sampled it in detail and conducted microstructural, mineralogical and geochemical studies, including thin section petrography, UV fluorescence petrography, X-ray diffraction, vitrinite reflectance, bitumen reflectance, fluid inclusion analysis and Raman spectroscopy. Organic matter is disseminated through the carbonate-bearing siltstone source rocks and concentrated in numerous bedding parallel stylolites and in two sets of carbonate veins, one along bedding parallel fractures and the other cross-cutting stylolites and bedding. The research about maturity of organic matter finds vitrinite reflectance values increase from the dispersed kerogen (0.64%) to the stylolites (the one of oriented vitrinite is 0.72% and the one of migrated bitumen is 2.38%); Homogenization temperatures of fluid inclusions in veins containing hydrocarbon fluid inclusions show an increase from 178.5℃ in the bedding parallel veins to 222℃ in the cross-cutting veins, confirmed by Raman spectroscopy. These results support a model of progressive heating accompanied by fluid loss during later stages of thermal maturation of source rock and the onset of primary migration. Obviously, the occurrence of organic matter is the trace of hydrocarbon primary migration, and the bedding lamination surfaces and cross-cutting fissures are the principal pathways of hydrocarbon-bearing fluids migration. Bedding lamination surfaces evolved into stylolites along the earliest primary migration pathways, followed by bedding parallel and cross-cutting fissures.

关键词： hydrocarbon source rock, thermal evolution history, primary migration, migration pathway, Junggar Basin

The development of solid oxide co-electrolysis of H_(2)O and CO_(2)on large-size cells and stacks

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iEnergy 2023年第2期2卷 109-118页

作者： Jingjing Liang Jianzhong Zhu minfang Han Xiufu Hua Duruo Li Meng Ni Fuel Cell and Energy Storage Center Department of Energy and Power EngineeringTsinghua UniversityBeijing 100084China yangtze Delta Region Institute of Tsinghua University ZhejiangJiaxing 314006China Department of Building and Real Estate The Hong Kong Poly-technic UniversityHong Kong 999077China

In the context of carbon neutrality,conversion of CO_(2)into CO is an effective way for negative carbon *** reduction is a novel developed pathway,among which,solid oxide co-electrolysis technology is promising for its high efficiency and low electricity *** concerning the large-size cell and stack of application level are *** review,targeting at the not yet fully understood reaction mechanism and the most concerning issue of durability,details the reported factors playing important roles in the reaction mechanism and durability of *** is found that the operating conditions such as inlet mixtures and applied current significantly affect the reaction mechanism of co-electrolysis and the experiments on button cells can not reflect the real reaction mechanism on industrial-size ***,the durability test of large-size single cells and stacks at high current with high conversion rate and the potential of solid oxide co-electrolysis combing with intermittent renewable energy are also reviewed and ***,an outlook for future exploration is also offered.

关键词： Solid oxide co-electrolysis large-size cell stack reaction mechanism durability

UV irradiation induced conductivity improvement in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) film

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Science China(Technological Sciences) 2014年第1期57卷 44-48页

作者： XING YingJie QIAN minfang WANG GuiWei ZHANG GengMin GUO DengZhu WU JinLei Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics Peking University

We describe a simple method to increase the conductivity of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)film by exposure to ultraviolet(UV)light in *** to four order of conductivity improvement(from 10 3to 50 S/cm)is achieved by irradiating PEDOT:PSS film with 254 nm ultraviolet(UV)*** conductivity in UV treated PEDOT:PSS film is stable under ambient *** mechanism for conductivity improvement is investigated by current-voltage measurement,atomic force microscopy,and absorption ***-cross-linking of PSS chains is determined as the reason for conductivity *** result demonstrates that UV treatment is capable of modifying the conductivity of PEDOT:PSS film independent of the process of film formation.

关键词： conductivity ultraviolet photo-cross-linking

Sources and transformations of nitrite in the Amundsen Sea in summer 2019 and 2020 as revealed by nitrogen and oxygen isotopes

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Acta Oceanologica Sinica 2023年第4期42卷 16-24页

作者： yangjun Chen Jinxu Chen Yi Wang You Jiang minfang Zheng Yusheng Qiu Min Chen College of Ocean and Earth Sciences Xiamen UniversityXiamen 361102China School of Marine Science and Fisheries Jiangsu Ocean UniversityLianyungang 222005China

In this study,the nitrogen and oxygen isotope compositions of nitrite in the upper 150 m water column of the Amundsen Sea in the summer of 2019 and 2020 were measured to reveal the distribution and transformation of nitrite in the euphotic zone of the Southern *** found that primary nitrite maxima(PNMs)are widely present in the Amundsen Sea,where the depth of occurrence deepens from east to west and nitrite concentrations *** from dual isotopes suggests that the formation of PNMs in all regions of the Amundsen Sea is dominated by ammonia *** importantly,the nitrogen and oxygen isotope compositions of nitrite in the Amundsen Sea mixed layer are abnormal,and their depth profiles are mirror *** anomalies exhibit spatial variations,with central surface water having the lowest nitrogen isotope composition(−89.9‰±0.2‰)and western surface water having the highest oxygen isotope composition(63.3‰±0.3‰).Isotopic exchange reaction between nitrate and nitrite is responsible for these isotope anomalies,as both nitrogen and oxygen isotopes have large isotopic fractionation and opposite enrichment *** proves that isotopic exchange reaction operates extensively in different regions of the Amundsen *** study highlights the unique role of dual isotopes of nitrite in deepening the understanding of nitrogen *** studies on ammonia oxidation and isotopic exchange between nitrate and nitrite are warranted in the future to understand their roles in the nitrogen cycle in the Southern Ocean.

关键词： nitrogen isotope oxygen isotope nitrite Amundsen Sea