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A labor-free index-guided semantic segmentation approach for urban vegetation mapping from high-resolution true color imagery

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International Journal of Digital Earth 2023年第1期16卷 1640-1660页

作者： Peng Zhang Cong Lin Shanchuan Guo Wei Zhang hong fang Peijun Du Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural ResourcesSchool of Geography and Ocean ScienceNanjing UniversityNanjingPeople’s Republic of China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application NanjingPeople’s Republic of China c Nanjing Research Institute of Surveying Mapping&Geotechnical InvestigationCo.LtdNanjingPeople’s Republic of China

Accurate and timely information on urban vegetation(UV)can be used as an important indicator to estimate the health of *** to the low cost of RGB cameras,true color imagery(TCI)has been widely used for high spatial resolution UV ***,the current index-based and classifier-based UV mapping approaches face problems of the poor ability to accurately distinguish UV and the high reliance on massive annotated samples,*** address this issue,an index-guided semantic segmentation(IGSS)framework is proposed in this ***,a novel cross-scale vegetation index(CSVI)is calculated by the combination of TCI and Sentinel-2 images,and the index value can be used to provide an initial UV ***,reliable UV and non-UV samples are automatically generated for training the semantic segmentation model,and then the refined UV map can be *** experimental results show that the proposed CSVI outperformed the existingfive RGB vegetation indices in highlighting UV cover and suppressing complex backgrounds,and the proposed IGSS workflow achieved satisfactory results with an OA of 87.72%∼88.16%and an F1 score of 87.73%∼88.37%,which is comparable with the fully-supervised method.

关键词： Urban vegetation mapping Sustainable Development Goals(SDGs) cross-scale vegetation index(CSVI) semantic segmentation high-resolution true color imagery(TCI)

RBF-Type Artificial Neural Network Model Applied in Alloy Design of Steels

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Journal of Iron and Steel Research International 2008年第2期15卷 87-90页

作者： YOU Wei LIU Ya-xiu BAI Bing-zhe fang hong-sheng Department of Mechanical and Electrical Engineering North China Institute of Science and Technology Beijing 101601 China Department of Electronics and Information Engineering North China Institute of Science and Technology Beijing 101601 China Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

RBF model,a new type of artificial neural network model was developed to design the content of carbon in low-alloy engineering *** errors of the ANN model are：MSE 0.052 1,MSRE 17.85%,and VOF 1.932 *** results obtaine... 详细信息

关键词： radial-basis-function, artificial neural network, carbon alloy design neurobalance

Cloning and Sequence Analysis of a Novel Cold-Adapted Lipase Gene from Strain lip35 (Pseudomonas sp.)

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Agricultural Sciences in China 2008年第10期7卷 1216-1221页

作者： WANG Cai-hong GUO Run-fang YU hong-wei JIA Ying-min Department of Biology Engineering Agricultural University of Hebei Baoding 071000 P.R.China

A combination method of the usual-PCR and reverse-PCR for the cloning of a novel lipase gene directly from the total genomic DNA of strain lip35 （Pseudomonas sp.） is described, whereby a lipase gene （lip） was cloned directly from genomic DNA. The sequence data have been deposited in the GenBank and EMBL data bank with the accession number EU414288. The nucleotide sequence showed a major open reading frame encoding a 59-kDa protein of 566 amino acid residues, which contained a lipase consensus sequence GXSXG. The lipase lip had 74 and 70% homologies with the lipases of an uncultured bacterium and P. fluorescens PfO-1, respectively, but it did not show any overall homology with lipases from other origins. The functional lipase was obtained when the lip gene was expressed in Pichia pastoris GS115.

关键词： PCR reverse-PCR lipase gene clone sequence analysis

MISCIBILITY,CRYSTALLIZATION AND MECHANICAL PROPERTIES OF PPC/PBS BLENDS

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Chinese Journal of Polymer Science 2007年第6期25卷 589-597页

作者： Hui-liang Zhang Xiao-hong Sun Qing-yong Chen Min-qiao Ren Zhi-hao Zhang hong-fang Zhang Zhi-shen Mo State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Graduate School of Chinese Academy of Science Changchun 130022 China

In this paper, melt blends of poly（propylene carbonate）（PPC） with poly（butylene succinate）（PBS） were characterized by dynamic mechanical analysis （DMA）, differential scanning calorimetry （DSC）, tensile testing, wide-angle X-ray diffraction （WAXD）, polarized optical microscopy and thermogravimetric analysis （TGA）. The results indicated that the glass transition temperature of PPC in the 90/10 PPC/PBS blend was decreased by about 11 K comparing with that of pure PPC. The presence of 10% PBS was partially miscible with PPC. The 90/10 PPC/PBS blend had better impact and tensile strength than those of the other PPC/PBS blends. The glass transition temperature of PPC in the 80/20, 70/30, and 60/40 PPC/PBS blends was improved by about 4.9 K, 4.2 K, and 13 K comparing with that of pure PPC, respectively; which indicated the immiscibility between PPC and PBS. The DSC results indicated that the crystallization of PBS became more difficult when the PPC content increased. The matrix of PPC hindered the crystallization process of PBS. While the content of PBS was above 20%, significant crystallization-induced phase separation was observed by polarized optical microscopy. It was found from the WAXD analysis that the crystal structure of PBS did not change, and the degree of crystallinity increased with increasing PBS content in the PPC/PBS blends.

关键词： Poly(propylene carbonate) Poly(butylene succinate) Miscibility Crystallization Mechanical properties.

Thermodynamics of the System of Massive Dirac Fermions in a Uniform Magnetic Field

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Chinese Physics Letters 2021年第9期38卷 22-29页

作者： Ren-hong fang Ren-Da Dong De-Fu Hou Bao-Dong Sun Key Laboratory of Particle Physics and Particle Irradiation(MOE) Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOS) Central China Normal UniversityWuhan 430079China

We construct the grand partition function of the system of massive Dirac fermions in a uniform magnetic field from Landau levels,through which all thermodynamic quantities can be *** use of the Abel–Plana formula,these thermodynamic quantities can be expanded as power series with respect to the dimensionless variable𝑏b=2eB/T^(2).The zero-field magnetic susceptibility is expanded at zero mass,and the leading order term is *** also calculate scalar,vector current,axial vector current and energy-momentum tensor of the system through ensemble average *** correction to chiral separation effect is *** massless chiral fermions,our results recover the chiral magnetic effect for right-and left-handed fermions,as well as chiral separation effect.

关键词： chiral Dirac expanded

Forward Single-Stage Power Factor Correction AC/DC Converter

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电力电子技术 2005年第6期39卷 30-34页

作者： fang Lin Luo hong Ye Nanyang Technological Unixersity Singapore 639798

Power Factor Correction (PFC) is the capacity of generating or absorbing the reactive power produced by a *** major industrial loads have an inductive power *** current tends to go beyond the power is usually used for the power *** paper introduces a forward Single-Stage Power Factor Correction AC/DC converter which effectively improves the power factor up to PF=*** simulation and experimental results verified our design.

关键词：功率因素变流器电流转换电路设计传导模式

New Exact Solutions and Interactions Between Two Solitary Waves for (3+1)-Dimensional Jimbo-Miwa System

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Communications in Theoretical Physics 2008年第5期49卷 1245-1248页

作者： MA Song-Hua fang Jian-Ping hong Bi-Hai ZHENG Chun-Long College of Mathematics and Physics Lishui University Lishui 323000 China

By means of an extended mapping approach and a linear variable separation approach, a new family of exact solutions of the （3＋1）-dimensional Jimbo-Miwa system is derived. Based on the derived solitary wave solution... 详细信息

关键词： (3+1)-dimensional Jimbo-Miwa system exact solutions localized excitations the interactionsbetween two solitary waves

CCT Curves of Low-Carbon Mn-Si Steels and Development of Water-Cooled Bainitic Steels

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Journal of Iron and Steel Research International 2010年第3期17卷 46-50页

作者： XU Feng-yun WANG Yong-wei BAI Bing-zhe fang hong-sheng Key Laboratory for Advanced Materials of Ministry of Education Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

CCT curves of Mn-Si steels with different manganese contents or carbon contents were determined. The results show that the transformation range of bainite can be separated from that of ferrite when the manganese content approaches a certain content, and the incubation period of ferrite increases more significantly than that of bainite transformation with the increase of carbon content in Mn-Si steels. Furthermore, water-cooled bainitic steels without adding expensive alloying element were developed. Granular bainite was obtained when a bar with diameter of 300 mm was cooled by water, and a mixed microstructure of granular bainite and martensite was obtained in watercooled plate with thickness of 40 mm. The developed water-cooled bainitic Steels containing no expensive alloying element showed a good combination of strength and toughness. The tensile strength, yield strength, and toughness （AKU at --20℃ ） of bar with diameter of 300 mm after water cooling were higher than 850 MPa, 620 MPa, and 65 J, respectively, and those of plate with thickness of 40mm after water cooling were higher than 1000 MPa, 800 MPa, and 50J, respectively.

关键词： bainitic steel water cooling granular bainite CCT curve Mn-Si steel

A primary intestinal lymphangiectasia patient diagnosed by capsule endoscopy and confirmed at surgery: A case report

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World Journal of Gastroenterology 2007年第15期13卷 2263-2265页

作者： You-hong fang Bing-Ling Zhang Jia-Guo Wu Chun-Xiao Chen The First Affiliated Hospital of College of Medicine Zhejiang University Hangzhou 310003 Zhejiang Province China Sir Run Run Shaw hospital of College of Medicine Zhejiang University Hangzhou 310003 Zhejiang Province China

Intestinal lymphangiectasia （IL） is a rare disease characterized by dilated lymphatic vessles in the intestinal wall and small bowel mesentery which induce loss of protein and lymphocytes into bowel lumen. Because it most often occurs in the intestine and cannot be detected by upper gastroendoscopy or colonoscopy, and the value of common image examinations such as X-ray and computerized tomography （CT） are limited, the diagnosis of IL is difficult, usually needing the help of surgery. Capsule endoscopy is useful in diagnosing intestinal diseases, such as IL. We here report a case of IL in a female patient who was admitted for the complaint of recurrent edema accompanied with diarrhea and abdominal pain over the last twenty years, and aggravated ten days ago. She was diagnosed by M2A capsule endoscopy as a primary IL and confirmed by surgical and pathological examination.

关键词： Intestinal lymphangiectasia Capsule endoscopy Hypoproteinemia Lymphocytopenia Edema Surgery