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Toward few-shot domain adaptation with perturbation-invariant representation and transferable prototypes

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Frontiers of Computer Science 2022年第3期16卷 83-93页

作者： Junsong FAN Yuxi WANG He GUAN chunfeng song Zhaoxiang ZHANG Center for Research on Intelligent Perception and Computing National Laboratory of Pattern RecognitionInstitute of AutomationChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Centre for Artificial Intelligence and Robotics HKISI CASHongKong 999077China

Domain adaptation(DA)for semantic segmentation aims to reduce the annotation burden for the dense pixellevel prediction *** focuses on tackling the domain gap problem and manages to transfer knowledge learned from abundant source data to new target *** recent works have achieved rapid progress in this field,they still underperform fully supervised models with a large margin due to the absence of any available hints in the target *** that few-shot labels are cheap to obtain in practical applications,wc attempt to leverage them to mitigate the performance gap between DA and fully supervised *** key to this problem is to leverage the few-shot labels to learn robust domain-invariant predictions *** this end,we first design a data perturbation strategy to enhance the robustness of the ***,a transferable prototype module is proposed to bridge the domain gap based on the source data and few-shot *** means of these proposed methods,our approach can perform on par with the fully supervised models to some *** conduct extensive experiments to demonstrate the effectiveness of the proposed methods and report the state-of-the-art performance on two popular DA tasks,i.e.,from GTA5 to Cityscapes and SYNTHIA to Cityscapes.

关键词： domain adaptation semantic segmentation

Synthesis and fluorescence properties of CdSe/CdS nanoparticles in aqueous media

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Science China Chemistry 2010年第5期53卷 1054-1058页

作者： Han, DongMei song, chunfeng Guo, GuangSheng Li, XiaoYu School of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China Key Laboratory for Nanomaterials Ministry of Education Beijing University of Chemical Technology Beijing 100029 China

On the basis of unique structural characteristics of α-cyclodextrin,α-cyclodextrin modified CdSe/CdS nanoparticles have been successfully synthesized in aqueous *** of AFM,TEM,EDS,FTIR,UV-vis absorbance and photoluminescence spectra were used to characterize the morphology,composition and optical characteristics of the synthesized *** results showed that the as-synthesized nanoparticles were elliptical and composed of several small *** average length and diameter were about 20 nm and 15 ***/CdS nanoparticles had single well-crystallized hexagonal *** with a shell of CdS on the surface,α-CD/CdSe-CdS nanoparticles exhibited a red shift in the absorption spectrum,intensity growth in the emission spectrum and a substantial increase in Quantum *** size distribution could be adjusted by precursor ratios in the presence of α-cyclodextrins.

关键词： CdSe/CdS α-cyclodextrins aqueous solution synthesis fluorescence properties

Recent advances in ionic liquids-based hybrid processes for CO_(2) capture and utilization

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Journal of Environmental Sciences 2021年第1期33卷 281-295页

作者： Shaohan Lian chunfeng song Qingling Liu Erhong Duan Hongwei Ren Yutaka Kitamura Tianjin Key Laboratory of Indoor Air Enuironmental Quality Control School of Enuironmental Science and EngineeringTianjin UniversityTianjin 300072China Pollution Prevention Biotechnology Laboratory of Hebei Province School of Environmental Science and EngineeringHebei University of Science and TechnologyshijizhuangHebei 050018China Graduate School of L.ife and Environmental Sciences University of Tsukuba1-1-1TennodaiTsukubalbaraki 305-8572Japan

CO_(2) capture and utilization(CCU)is an effective strategy to mitigate global ***,adsorption and membranes are methods used for CO_(2) separation and capture,and various catalytic pathways have also been developed for CO_(2) *** widely researched and used in industry,these processes are energy-intensive and this challenge needs to be *** realize further optimization,novel materials and processes are continuously being *** generation materials such as ionic liquids(ILs)have shown promising potential for cost-effective CO_(2) capture and *** study reviews the current status of ILs-based solvents,adsorbents,membranes,catalysts and their hybrid processes for CO_(2) capture and *** special properties of ILs are integrated into new materials through hybridization,which significantly improves the performance in the process of CCU.

关键词： CO_(2) Hybrid Ionic liquids Absorption Adsorption Membrane Catalysis

Food processing wastewater purification by microalgae cultivation associated with high value-added compounds production——A review

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Chinese Journal of Chemical Engineering 2019年第12期27卷 2845-2856页

作者： Shuhong Li Shuang Zhao Siliang Yan Yiting Qiu chunfeng song Yang Li Yutaka Kitamura State Key Laboratory of Food Nutrition and Safety Key Laboratory of Food Nutrition and SafetyMinistry of EducationCollege of Food Engineering and BiotechnologyTianjinUniversity of Science&TechnologyTianjin 300457China Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin University135 Yaguan RoadHaihe Education ParkTianjin 300350China Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesTianjin 300308China Graduate School of Life and Environmental Sciences University of Tsukuba1-1-1TennodaiTsukubaIbaraki 305-8572Japan

Microalgae have been considered as an efficient microorganism for wastewater treatment with simultaneously bioenergy and high value-added compounds ***,the high energy cost associated with complicated biorefinery(*** cultivation,harvesting,drying,extraction,conversion,and purification)is a critical challenge that inhibits its large-scale *** different nutrition(***,nitrogen and phosphorous)sources,food processing wastewater is a relative safe and suitable one for microalgae cultivation due to its high organic content and low *** this review,the characteristic of different food wastewater is summarized and *** potential routes of value-added products(***,pigment,polysaccharide,and amino acid)production along with wastewater purification are *** existing challenges(*** cost,efficiency and mechanism)of microalgal-based wastewater treatment are also *** prospective of microalgae-based food processing wastewater treatment strategies(such as microalgae-bacteria consortium,poly-generation of bioenergy and value-added products)is *** can be observed that food wastewater treatment by microalgae could be a promising strategy to commercially realize waste source reduce,conversion and reutilization.

关键词： Food wastewater Microalgae Value-added produce Biofuel Polysaccharide Protein

Potential applications of porous organic polymers as adsorbent for the adsorption of volatile organic compounds

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Journal of Environmental Sciences 2021年第7期33卷 184-203页

作者： Shuangchun Lu Qingling Liu Rui Han Miao Guo Jiaqi Shi chunfeng song Na Ji Xuebin Lu Degang Ma Tianjin Key Lab of Indoor Air Environmental Quality Control School of Environmental Science and TechnologyTianjin UniversityTianjin 300350China State Key Laboratory of Engines Tianjin UniversityTianjin 300350China

Volatile organic compounds(VOCs)with high toxicity and carcinogenicity are emitted from kinds of industries,which endanger human health and the *** is a promising method for the treatment of VOCs due to its low cost and high *** recent years,activated carbons,zeolites,and mesoporous materials are widely used to remove VOCs because of their high specific surface area and abundant ***,the hydrophilic nature and low desorption rate of those materials limit their commercial ***,the adsorption capacities of VOCs still need to be *** organic polymers(POPs)with extremely high porosity,structural diversity,and hydrophobic have been considered as one of the most promising candidates for VOCs *** review generalized the superiority of POPs for VOCs adsorption compared to other porous materials and summarized the studies of VOCs adsorption on different types of ***,the mechanism of competitive adsorption between water and VOCs on the POPs was ***,a concise outlook for utilizing POPs for VOCs adsorption was discussed,noting areas in which further work is needed to develop the next-generation POPs for practical applications.

关键词： Porous organic polymers Volatile organic compounds Adsorption superiority Competitive adsorption

Research on critical technology of micro/nano bioparticles manipulation platform based on light-induced dielectrophoresis

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Science China(Technological Sciences) 2009年第10期52卷 2831-2839页

作者： NI ZhongHua YI Hong ZHU ShuCun song chunfeng Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing 210096China

On the basis of the research on the status and problems of micro/nano bio-particles manipulation using dielectrophoresis, the theoretical basis and the model simulation of micro/nano bio-particles manipu-lation using light-induced dielectrophoresis were discussed. The space distribution of electric field and dielectrophoresis forces in different heights were also obtained. On this basis, the core component of the micro manipulation system, that is, photoconductive layer of the chip, was completed in the mate-rial selection, fabricating process and performance analysis testing. Then the voltage drop of the sus-pension and the effective voltage frequency spectrum were obtained. Finally, by combining the machine vision detection with real-time tracking system, the micro/nano bio-particles manipulation platform based on the light-induced dielectrophoreisis was established, and then the manipulations for micro/nano bio-particles, such as quick collection, transport, separation, were implemented. This provided a basis for rapid, accurate, and low-cost detection of serious diseases based on the micro-fluidic biochip and early diagnosis.

关键词： light-induced dielectrophoresis micro-fluidic biochip dielectric polarization mechanism separation chip

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MgFe hydrotalcites-derived layered structure iron molybdenum sulfide catalysts for eugenol hydrodeoxygenation to produce phenolic chemicals

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Journal of Energy Chemistry 2018年第2期27卷 600-610页

作者： Xinyong Diao Na Ji Mingyuan Zheng Qingling Liu chunfeng song Yibo Huang Qing Zhang Alazar Alemayehu Luoyun Zhang Changhai Liang Laboratory of Advanced Materials and Catalytic Engineering Dalian University of Technology School of Environmental Science and Engineering Key Laboratory of Biomass-Derived Gas and Oil for Chinese Petrochemical IndustryTianjin University Dalian Institute of Chemical Physics Chinese Academy of Sciences

Hydrodeoxygenation（HDO） is an effective alternative to produce value-added chemicals and liquid fuels by removing oxygen from lignin-derived compounds. Sulfide catalysts have been proved to have good activity for the HDO and particularly high selectivity to phenolic products. Herein, we presented a novel way to prepare the layered structure sulfide catalysts（MgFeMo-S） derived from MgFe hydrotalcites via the intercalation of Mo in consideration of the memory effect of the calcined hydrotalcite. By varying the Mg/Fe mole ratio, a series of MgFeMo-S catalysts were successfully prepared and characterized by nitrogen adsorption/desorption isotherms, X-ray diffraction（XRD）, transmission electron microscopy（TEM）,and inductively coupled plasma optical emission spectrometer（ICP-OES）. The characterization results indicated that the MgFeMo-S catalyst has retained the unique layered structure, which can facilitate uniform dispersion of the MoS2 species on both the surface and interlayer of the catalysts. For the HDO of eugenol, the Mg1Fe2Mo-S catalysts exhibited the best HDO activity among all the catalysts due to its higher active metal contents and larger pore size. The HDO conversion was 99.6% and the yield of phenolics was 63.7%, under 5 MPa initial H2 pressure（measured at RT） at 300 ℃ for 3 h. More importantly,MoS2 species deposited on the interlayer galleries in the MgFeMo-S catalysts resulted in dramatically superior HDO activity to MoS2/Mg1Fe2-S catalyst. Based on the mechanism investigation for eugenol, the HDO reaction route of eugenol under sulfide catalytic system has been proposed for the first time. Further applicability of the catalyst on HDO of more lignin-derived compounds was operated, which showed good HDO activity and selectivity to produce aromatic products.

关键词： MgFe Hydrotalcite Sulfide catalysts Layered structure Hydrodeoxygenation Eugenol

L-3-n-butylphthalide protects against vascular dementia via activation of the Akt kinase pathway

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Neural Regeneration Research 2013年第19期8卷 1733-1742页

作者： Yaping Huai Yanhong Dong Jing Xu Nan Meng chunfeng song Wenbin Li Peiyuan Lv Department of Neurology Hebei Medical University Department of Neurology Hebei General Hospital Electron Microscope Center Hebei Medical University Department of Pathophysiology Hebei Medical University

As a neuroprotective drug for the treatment of ischemic stroke, 3-n-butylphthalide, a celery seed ex- tract, has been approved by the State Food and Drug Administration of China as a clinical therapeutic drug for ischemic stroke patients. L-3-n-butylphthalide possesses significant efficacy in the treatment of acute ischemic stroke. The activated Akt kinase pathway can prevent the death of nerve cells and exhibit neuroprotective effects in the brain after stroke. This study provides the hypothesis that I-3-n- butylphthalide has a certain therapeutic effect on vascular dementia, and its mechanism depends on the activation of the Akt kinase pathway. A vascular dementia mouse model was established by cere- bral repetitive ischemia/reperfusion, and intragastrically administered I-3-n-butylphthalide daily for 28 consecutive days after ischemia/repedusion, or 7 consecutive days before ischemia/reperfusion. The Morris water maze test showed significant impairment of spatial learning and memory at 4 weeks after operation, but intragastric administration of I-3-n-butylphthalide, especially pretreatment with I-3-n- butylphthalide, significantly reversed these changes. Thionine staining and western blot analylsis showed that preventive and therapeutic application of I-3-n-butylphthalide can reduce loss of pyrami- dal neurons in the hippocampal CA1 region and alleviate nerve damage in mice with vascular demen- tia. In addition, phosphorylated Akt expression in hippocampal tissue increased significantly after I-3-n- butylphthalide treatment. Experimental findings demonstrate that I-3-n-butylphthalide has preventive and therapeutic effects on vascular dementia, and its mechanism may be mediated by upregulation of phosphorylated Akt in the hippocampus.

关键词： neural regeneration brain injury ischemia/reperfusion Akt phosphorylated Akt Morris water maze cog-nitive function 3-n-butylphthalide hippocampus learning memory dementia grants-supported paper neuroregeneration

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基于光诱导介电泳的单粒子操纵技术

机械工程学报 2010年第7期46卷 148-153页

作者：宋春峰易红倪中华东南大学机械工程学院南京211189 东南大学江苏省微纳生物医疗器械设计与制造重点实验室南京211189

在综合分析当前生物粒子微操纵技术的基础上,设计一种基于光诱导介电泳技术的微操纵芯片,并完成芯片关键部件——光电导薄膜的加工。在准静态电场条件下,对光斑操纵模式进行建模仿真,光斑光强服从高斯分布,光斑尺寸直接影响电场平方梯... 详细信息

在综合分析当前生物粒子微操纵技术的基础上,设计一种基于光诱导介电泳技术的微操纵芯片,并完成芯片关键部件——光电导薄膜的加工。在准静态电场条件下,对光斑操纵模式进行建模仿真,光斑光强服从高斯分布,光斑尺寸直接影响电场平方梯度的分布,随着光斑尺寸缩小电场平方的x向梯度峰值增大,而随着高度升高电场平方的x向梯度峰值急剧减小。最后通过光诱导介电泳测试平台对单粒子操纵性能进行试验验证。试验结果表明,在去离子水中,当电压峰—峰值为20 V,频率1 MHz时,粒子受负介电泳作用而远离光斑,并且在光斑模式下直径50μm的粒子移动的最大速度可达45μm/s;而在环型虚拟电极模式下能有效控制单粒子运动方向。

关键词：光诱导介电泳微粒操纵有限元法