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Design of landscape morphology assisted quantification model based on improved fa-SOM

GEOJOURNAL 2025年第2期90卷 1-19页

作者： Chi, Hui Liaodong Univ Sch Arts Dandong 118000 Peoples R China

To solve the low accuracy of traditional landscape form analysis methods, a method combining the firefly algorithm and a self-organizing feature mapping neural network is proposed. Based on this algorithm, a landscape shape-assisted quantization model is designed. The performance of the proposed algorithm is compared with other algorithms. The results showed that the training error and average accuracy of the proposed algorithm were 0.00093 and 97.82%, respectively, which were better than comparison algorithms. The performance analysis experiment of the proposed landscape shape-assisted quantization model showed that the model had a good classification and recognition effect. The proposed landscape form auxiliary quantification model has good practical value, which is conducive to improving the cognition ability of landscape form structure law.

关键词： fa SOM Landscape form Quantification BP

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Mechanical Properties of Formamidinium Halide Perovskites faBX_3(fa=CH(NH_2)_2;B=Pb, Sn;X=Br, I) by First-Principles Calculations

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Chinese Physics Letters 2019年第5期36卷 44-48页

作者： Lei Guo Gang Tang Jiawang Hong School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081

The mechanical properties of formamidinium halide perovskites faBX_3(fa=CH(NH_2)_2; B=Pb, Sn; X=Br, I)are systematically investigated using first-principles calculations. Our results reveal that faBX_3 perovskites possess excellent mechanical flexibility, ductility and strong anisotropy. We shows that the planar organic cation fa+ has an important effect on the mechanical properties of faBX3 perovskites. In addition, our results indicate that (i) the moduli(bulk modulus B, Young's modulus E, and shear modulus G) of faBBr_3 are larger than those of faBI_3 for the same B atom, and (ii) the moduli of faPbX_3 are larger than those of faSnX_3 for the same halide atom. The reason for the two trends is demonstrated by carefully analyzing the bond strength between B and X atoms based on the projected crystal orbital Hamilton population method.

关键词： fa=CH Sn Mechanical Properties of Formamidinium Halide Perovskites faBX3 by First-Principles Calculations B fa CH

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Investigation and preparation of CeO₂-TiO₂/fa (fly ash) SCR catalyst

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INTEGRATED FERROELECTRICS 2017年第1期181卷 1-8页

作者： Ren, Xiufeng Hai, Chunxi Li, Xiang Shen, Yue Zeng, Jinbo Zhou, Yuan Chen, Yunfa Chinese Acad Sci Qinghai Inst Salt Lakes Xining Qinghai Peoples R China Univ Chinese Acad Sci Beijing Peoples R China Chinese Acad Sci Inst Proc Engn Beijing Peoples R China

CeO2-TiO2/fa catalysts with the selective catalytic reduction (SCR), using industrial solid waste-Fly Ash (fa) as the supporter was prepared by sol-gel and insuccation methods. Ammonia was used as reducing gas to detect the catalytic performance of as-prepared catalyst. Surface structure and catalytic properties of the catalyst were characterized by using BET, XRD, SEM and denitrification tests, respectively. It was confirmed that the loading of CeO2 and TiO2 on fa supporter led to the increased the specific surface area of catalysts, which resulted in the enhanced catalytic performance toward removing NOx. The NOx conversion over this catalyst can reach 95.3%.

关键词： Environmental catalysts SCR fly ash supported catalysts CeO2-TiO2 fa

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Achieving the nitrite pathway using fa inhibition and process control in UASB-SBR system removing nitrogen from landfill leachate

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Science China Chemistry 2010年第5期53卷 1209-1215页

作者： Sun, HongWei Yang, Qing Dong, GuoRi Hou, HongXun Zhang, ShuJun Yang, YingYing Peng, YongZhen Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering Beijing University of Technology Beijing 100124 China Anhui Guozhen Environmental Projection Sci. and Tech. Co. Ltd. Hefei 230088 China

An up-flow sludge blanket(UASB) and sequencing batch reactor(SBR) system was introduced to remove organics and nitrogen from landfill *** synergetic effect of free ammonia(fa) inhibition and process control was used to achieve the nitrite pathway in the *** previous research,inhibition of fa on nitrite oxidizing bacteria(NOB) activity has been revealed and the process control parameters(DO,ORP and pH) exactly indicate the end-point of *** method was implemented in the SBR achieving stable nitrogen removal via the nitrite pathway from landfill *** degree of nitrite accumulation during the nitritation was monitored along with the simultaneous and advanced removal of organics and nitrogen in the UASB-SBR *** nitrifying bacteria community was quantitatively analyzed by fluorescence in situ hybridization(FISH) *** tests were carried out to investigate the denitritation kinetics of microbial bacteria in the *** results showed that the nitrite pathway could be repeatedly and reliably achieved by synergetic effect of fa inhibition and process *** analysis showed the dominant nitrifying bacteria were ammonia-oxidizing β-Proteobacteria. Relationship between nitrite concentration and nitrite reduction rate followed the Monod-type *** maximum specific nitrite utilization rate(k) and half-velocity constant(Ks) were calculated as 0.44 gN gVSS-1d-1and 15.8 mg L-1,respectively.

关键词： landfill leachate partial nitrification fa FISH process control kinetic

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HMNPs@PDA-GQDs-fa as carries of gambogic acid for inhibiting VX2 tumor cells

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MATERIALS CHEMISTRY AND PHYSICS 2024年 328卷

作者： Yang, Yubing Liu, Wenwen Liu, Xiangnong Yang, Yuxiang Liuzhou Inst Technol Liuzhou 545616 Guangxi Peoples R China East China Univ Sci & Technol Sch Chem & Mol Engn Shanghai 200237 Peoples R China Yangzhou Univ Anal Test Ctr Yangzhou 225009 Peoples R China

Ellipsoidal hollow magnetic nanoparticles (HMNPs) were first synthesized through a hydrothermal method and coated with SiO2 2 via the Stober method, followed by template hydrothermal synthesis using C18TMS/TEOS 18 TMS/TEOS volume ratio for silica-shell formation. Then, the core-shell structure was grafted with graphene quantum dots (GQDs), dopamine hydrochloride (PDA), and folic acid (fa) by amide reaction to obtain HMNPs@PDA-GQDs-fa. Transmission electron microscopy, X-ray photoelectron spectroscopy, fluorescence spectroscopy, and N2 2 adsorption/desorption analysis confirmed the successful construction of the HMNPs@PDA-GQDs-fa nanoscale carrier-cargo composite. The carrier HMNPs@PDA-GQDs-fa had improved loading (51.63 %) and higher release (47.18 %) of gambogic acid (GA) at an acidic pH (5.7) than the release (32.23 %) at an acidic pH (7.4), showing the pH response of PDA to the surrounding environment of tumor cells. Cytotoxicity test results showed that the cell survival rate was above 95 %, indicating that the carrier-cargo had low cytotoxicity. Cell lethality was greatly improved after loading GA, and the advantages of using fa-grafted HMNPs as a targeting ligand for tumor imaging were demonstrated by SPECT imaging analysis. These results showed that HMNPs@PDA-GQDsfa had good biocompatibility and could be used for the treatment of VX2 tumors after loading GA.

关键词： Magnetic nanoparticles Graphene quantum dots fa Targeting Cytotoxicity

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The Influence of fa Content on the Mechanical and Hydration Properties of Alkali-Activated Ground Granulated Blast Furnace Slag Cement

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BUILDINGS 2024年第9期14卷 2973页

作者： Liu, Yunpeng Fu, Zhenbo Yang, Xihao Zhao, Yimeng Li, Binghan Xu, Da Yu, Shige Yao, Zhiyu Sun, Zhibin Zhen, Zhilu Ouyang, Xinfeng Zong, Yangyang Tian, Wendi Yu, Hai Zhao, Shuli Wei, Yen Niu, Kangmin Univ Sci & Technol Beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China Hebei Agr Univ Civil Engn Dept Baoding 071001 Peoples R China Kunming Univ Sci & Technol Fac Civil Engn & Mech Kunming 650500 Peoples R China Hebei Construct Grp Corp Ltd Baoding 071000 Peoples R China North Minzu Univ Sch Civil Engn Yinchuan 750021 Peoples R China Tsinghua Univ Dept Chem Beijing 100084 Peoples R China

This study primarily investigates the effect of fly ash (fa) content on the mechanical properties and hydration performance of alkali-activated ground granulated blast furnace slag cement (AAGC) and compares the related properties with ordinary Portland cement (OPC). Additionally, we examined the hydration products;performed thermal analysis, MIP, and SEM;and determined chemically bound water and pH values of AAGC. The compressive strength of AAGC showed a retrogression phenomenon from 3 to 28 days, with the 14-day and 28-day compressive strengths of AAGC being higher than those of OPC. The AAGC with 20% fa content exhibited the highest 28-day compressive strength (75 MPa). The hydration heat release rate curve of OPC and AAGC was divided into the initial induction period, induction period, acceleration period, deceleration period, and steady period. As fa content increased, the 28-day pore volume of AAGC increased, while pH values and chemically bound water decreased. SEM images of AAGC with low fa content showed more microcracks.

关键词： fa GBFS mechanical properties hydration properties pore structure pH values chemically bound water

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Effects of POfa replaced with fa on durability properties of GBFS included alkali activated mortars

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CONSTRUCTION AND BUILDING MATERIALS 2018年第Jun.30期175卷 174-186页

作者： Huseien, Ghasan fahim Tahir, Mahmood Md Mirza, Jahangir Ismail, Mohammad Shah, Kwok Wei Asaad, Mohammad Ali Univ Teknol Malaysia Inst Smart Infrastruct & Innovat Construct Fac Civil Engn Skudai Johor Bahru Malaysia Hydro Quebec Dept Mat Sci Res Inst 1800 Mte Ste Julie Varennes PQ J3X 1S1 Canada Univ Teknol Malaysia Fac Civil Engn Utm Johor Bahru 81310 Johor Malaysia Natl Univ Singapore Sch Design & Environm Dept Bldg Singapore 117566 Singapore

Concrete durability is a major concern in the construction sector worldwide. Recycled industrial and agriculture wastes based concrete production was shown to be beneficial in terms of enhanced durability performance and environmental friendliness. The effects of palm oil fuel ash (POfa) replacement by fly ash (fa) on the durability properties of ternary alkali activated mortars (AAMs) containing ground blast furnace slag (GBFS) was evaluated. The mixes were designed with six levels of POfa replaced by 0, 10, 20, 30, 40 and 50% (by weight) of fa. Durability properties such as porosity, drying shrinkage, resistances to freezing-thawing cycles, wet-dry cycles, abrasion, sulphuric acid and sulphate attack were investigated. The mortar containing 10% of fa as a replacement of POfa disclosed the best compressive strength amongst all the mixes at the age beyond 180 days. The overall durability performance of the AAMs obtained from POfa replaced by fa displayed an enhancement in porosity as well as dry shrinkage and a reduction in the resistances to freezing-thawing cycles, abrasion, acid and sulphate attack. (C) 2018 Published by Elsevier Ltd.

关键词： Alkali activated mortars GBFS POfa fa Durability performance

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Cross-Cultural Difference of Free Agency (fa) System Between MLB and NPB (Nippon Professional Baseball)

Cross-Cultural Difference of Free Agency (FA) System Between...

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10th International Conference on Applied Human factors and Ergonomics (AHFE) / AHFE International Conference on Social and Occupational Ergonomics

作者： Murata, Atsuo Okayama Univ Grad Sch Nat Sci & Technol 3-1-1 Tsushimanaka Okayama Japan

ISBN: (纸本)9783030201456;9783030201449

This study explored fa system of MLB and NPB, and summarized the cross-cultural difference of fa between MLB and NPB. First, the cognitive biases that are observed in common to both leagues were discussed from the viewpoint of our propensity to inaccurately predict the future. Second, the cross-cultural difference was discussed from the two viewpoints: (1) difference of mindset between two leagues, and (2) difference of authority of commissioner between two leagues. Finally, it was proposed how inefficiencies in baseball markets in sports management (failure in fa) should be avoided for the coexistence of teams and the prosperity of the league.

关键词： Handicapped competition Inaccurate prediction of future Cross-cultural difference MLB NPB fa Wa (harmony) Authority of commissioner

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fabrication of PDMS/fa superhydrophobic coatings and its self-cleaning and anti-icing performance

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SURfaCES AND INTERfaCES 2024年 52卷

作者： Song, Weitao Song, Huiping Zhang, Shirui fan, Zhenlian Cheng, fangqin Shanxi Univ Inst Resources & Environm Engn Taiyuan 030006 Peoples R China Shanxi Univ Engn Res Ctr Resource Efficiency Enhancing & Carbo Minist Educ Peoples Republ China Taiyuan 030006 Peoples R China

Superhydrophobic coatings have garnered immense attention in recent years. Nevertheless, the creation of superhydrophobic coatings is often associated with high production costs and comparatively intricate fabrication processes. In this paper, we utilize cheap and easily available ultrafine fly ash(fa) as the main raw material to replace the expensive filler substances traditionally used for constructing rough structures, and Polydimethylsiloxane(PDMS) as a low surface energy modification to construct fa-based superhydrophobic coatings by a simple spraying method. The PDMS/fa coating surface exhibits a water contact angle(WCA) of 157.65 degrees and degrees and a water sliding angle(WSA) of 2.00 degrees degrees The irregular morphology of the fa is conducive to forming a rough texture on the coating surface, which captures more air, leading to the formation of a stable air layer. Molecular dynamics (MD) simulations provide an insight into the anti-wetting mechanism of the superhydrophobic surface through an analysis of energetic and dynamic properties. PDMS/fa coatings remain superhydrophobic at 150 degrees C, in UV, and in varying pH environments. In addition, PDMS/fa coatings offer excellent mechanical, self-cleaning and anti-icing properties. This innovative approach to superhydrophobic coating, utilizing solid waste material as a basic material, demonstrates potential applicative value in fields such as self-cleaning and anti-icing.

关键词： PDMS fa Superhydrophobic Anti-icing Molecular dynamics

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fa used in the development of the vending machine with the function of returning changes

FA used in the development of the vending machine with the f...

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INTERNATIONAL CONFERENCE ON MANUfaCTURING AND ENGINEERING TECHNOLOGY (ICMET)

作者： Wang, Wei Gu, Hao Harbin Inst Technol Sch Comp Sci & Technol Weihai Peoples R China

ISBN: (纸本)9781315760728;9781138026452

Vending machines are an indispensable part of our daily life. Their characteristics are of high scientific and technological content and convenient sales. The management program of these machines has a strong dynamic characteristic due to the constant changes of state. At present, we have to insert just right coins into the vending machine because they cannot return the change in the transaction. In order to meet the needs of the real life, we design a set of vending machines with the function of returning changes.

关键词： vending machine fa returning change

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