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Multilevel Attention Unet Segmentation Algorithmfor Lung Cancer Based on CT Images

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Computers, Materials & Continua 2024年第2期78卷 1569-1589页

作者： huan Wang Shi Qiu Benyue Zhang Lixuan xiao Xi’an Institute of Optics and Precision Mechanics Chinese Academy of SciencesXi’anChina School of Biomedical Engineering Fourth Military Medical UniversityXi’anChina University of Illinois at Urbana Champion ChampaignUSA

Lung cancer is a malady of the lungs that gravely jeopardizes human ***,early detection and treatment are paramount for the preservation of human *** computed tomography(CT)image sequences can explicitly delineate the pathological condition of the *** meet the imperative for accurate diagnosis by physicians,expeditious segmentation of the region harboring lung cancer is of utmost *** utilize computer-aided methods to emulate the diagnostic process in which physicians concentrate on lung cancer in a sequential manner,erect an interpretable model,and attain segmentation of lung *** specific advancements can be encapsulated as follows:1)Concentration on the lung parenchyma region:Based on 16-bit CT image capturing and the luminance characteristics of lung cancer,we proffer an intercept histogram algorithm.2)Focus on the specific locus of lung malignancy:Utilizing the spatial interrelation of lung cancer,we propose a memory-based Unet architecture and incorporate skip connections.3)Data Imbalance:In accordance with the prevalent situation of an overabundance of negative samples and a paucity of positive samples,we scrutinize the existing loss function and suggest a mixed loss *** results with pre-existing publicly available datasets and assembled datasets demonstrate that the segmentation efficacy,measured as Area Overlap Measure(AOM)is superior to 0.81,which markedly ameliorates in comparison with conventional algorithms,thereby facilitating physicians in diagnosis.

关键词： Lung cancer computed tomography computer-aided diagnosis Unet segmentation

Paleoaltimetry proxies based on bacterial branched tetraether membrane lipids in soils

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Frontiers of Earth Science 2015年第1期9卷 13-25页

作者： huan YANG Wenjie xiao Chengling JIA Shucheng XIE State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Wuhan 430074 China State Key-Laboratory of Marine Geology Tongji University Shanghai 200092 China

The MBT/CBT （Methylation Index of Branched Tetraethers/Cyclisation ratio of Branched Tetraether） proxy, a terrestrial paleothermometer based on bacterial branched glycerol dialkyl glycerol tetraethers CoGDGTs）, was employed to indicate altimetry; however, the mechanistic control on this proxy is still ambiguous. Here, we investigated the bGDGTs＇ distribution and associated environmental factors along an altitude transect of Mt. Shennongjia in China in order to determine the applicability of bGDGT-based proxies to altimetry reconstruction. The MBT index exhibits only a weak correlation with estimated mean annual air temperature （MATe, estimated according to the meteorological record and lapse rate） or altitude. Likewise, MBT shows weak or no relationship with temperature or altitude at four other mountains （Mts. Meghalaya, Jianfengling, Gongga, and Rungwe）. It is notable that mean annual air temperature （MAT） or altitude estimated by the MBT/CBT proxy largely relies on CBT, rather than on MBT, which was generally acknowledged. The poor relationship between MBT and MATe for Mt. Shennongjia can be ascribed to the insensitive response of bGDGT-I to temperature. Our data fxom this mountain imply that care should be taken if the MBT/CBT proxy is employed as an indication of paleoaltimetry. We propose that the fractional abundance of bGDGTs may be a better paleoaltimeter than the MBT/ CBT proxy, because specific bGDGT subsets that might show the most sensitive response to temperature can be preferentially selected using a statistical method and used to establish local calibration. This local calibration was applied to Mt. Shennongjia and apparently improves the accuracy of temperature and altimetry reconstruction. The differential response of bGDGTs to temperature among mountains suggests that local calibrations are needed to better constrain the altimetry.

关键词： branched glycerol dialkyl glycerol tetraethers,soil pH paleoaltimetry temperatures

Flower Development and Anatomy of Agapanthus praecox ssp. orientalis (Leighton) Leighton

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Agricultural Sciences in China 2011年第9期10卷 1365-1373页

作者： ZHANG Di SHEN xiao-hui ZHUO Li-huan Department of Ornamental Plant and Horticulture College of Landscape Architecture Northeast Forestry University Harbin 150040 P.R. China Department of Landscape Science and Engineering School of Agriculture and Biology Shanghai Jiao Tong University Shanghai 200240 P.R.China

Floral buds of Agapanthus praecox ssp. orientalis were observed under dissecting and optical microscope to characterize floral organs development and to study relationships between anther development and microsporogenesis. Floral organs differentiation was comprised of 6 distinct stages including nought differentiation, inflorescence bud differentiation, floret primordia differentiation, tepal primordia differentiation, stamen primordia differentiation, and pistil primordia differentiation. Six tepals differentiated almost simultaneously which cross arranged in space and appeared in hexagonal distribution pattern. Six stamens were differentiated inside the tepals at the same time. Finally, 3 carpel primordia differentiated and formed syncarpous pistil. The whole process of floral bud differentiation took approximately 40 d with the first 3 stages developing more slowly than the later 3 stages. Morphology and color of the anther underwent obvious changes during the period between stamen primordia differentiation and anther maturation. Microspores also underwent significant development during this same interval. The relationship between the process of microsporogenesis and anther development has already been made clear by the sauash techniaue.

关键词： Agapanthus praecox ssp. orientalis floral organs floral bud differentiation microsporogenesis

A visual-textual fused approach to automated tagging of flood-related tweets during a flood event

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International Journal of Digital Earth 2019年第11期12卷 1248-1264页

作者： xiao huang Cuizhen Wang Zhenlong Li huan Ning Department of Geography University of South CarolinaColumbiaSCUSA

In recent years,social media such as Twitter have received much attention as a new data source for rapid flood *** timely response and large coverage provided by citizen sensors significantly compensate the limitations of non-timely remote sensing data and spatially isolated river ***,automatic extraction of flood tweets from a massive tweets pool remains a *** the Houston Flood in 2017 as a study case,this paper presents an automated flood tweets extraction approach by mining both visual and textual information a tweet contains.A CNN architecture was designed to classify the visual content of flood pictures during the Houston Flood.A sensitivity test was then applied to extract flood-sensitive keywords that were further used to refine the CNN classified results.A duplication test was finally performed to trim the database by removing the duplicated pictures to create the flood tweets pool for the flood *** results indicated that coupling CNN classification results with flood-sensitive words in tweets allows a significant increase in precision while keeps the recall rate in a high *** elimination of tweets containing duplicated pictures greatly contributes to higher spatio-temporal relevance to the flood.

关键词： Data mining flood social media CNN tweets geotagging

Scutellaria baicalensis, the golden herb from the garden of Chinese medicinal plants

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Science Bulletin 2016年第18期61卷 1391-1398页

作者： qing Zhao xiao-Ya Chen Cathie Martin Plant Science Research Center Shanghai Chenshan Botanical Garden Shanghai Key Laboratory of Plant Functional Genomics and Resources Shanghai 201602 China Department of Metabolic Biology John Innes CentreNorwich NR4 7UH UK Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of SciencesShanghai 200032 China

Scutellaria baicalensis Georgi, or Chinese skullcap, has been widely used as a medicinal plant in China for thousands of years, where the preparation from its roots is called huang-Qin. It has been applied in the treatment of diarrhea, dysentery, hypertension, hemorrhaging, insomnia,inflammation and respiratory infections. Flavones such as baicalin, wogonoside and their aglycones baicalein wogonin are the major bioactive compounds extracted from the root of S. baicalensis. These flavones have been reported to have various pharmacological functions, including anti-cancer,hepatoprotection, antibacterial and antiviral, antioxidant,anticonvulsant and neuroprotective effects. In this review,we focus on clinical applications and the pharmacological properties of the medicinal plant and the flavones extracted from it. We also describe biotechnological and metabolic methods that have been used to elucidate the biosynthetic pathways of the bioactive compounds in Scutellaria.

关键词： Scutellaria baicalensis Flavonoids Anti-cancer Metabolic biology Medicinal plants

Flat-type permanent magnet linear alternator:A suitable device for a free piston linear alternator

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第3期10卷 345-352页

作者： qing-feng LI Jin xiao Zhen huanG MOE Key Laboratory for Power Machinery and Engineering Shanghai Jiao Tong University Shanghai 200240 China

We proposed the flat-type permanent magnet linear alternator (LA) for free piston linear alternators (FPLAs) instead of the tubular one. Using the finite element method (FEM), we compare these two kinds of LAs. The FEM result shows that the flat-type permanent magnet LA has higher efficiency and larger output specific power than the tubular one, therefore more suitable for FPLAs, and that the alternator design can be optimized with respect to the permanent magnet length as well as the air gap.

关键词： Free piston (FP) Linear alternator (LA) Internal combustion engine (ICE) Finite element method (FEM)

A New Network Coding Mechanism Balancing Coding Opportunities, Energy and QoS in WSNs

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China Communications 2014年第6期11卷 108-118页

作者： ZHENG Kangfeng WANG Xiujuan ZHA Xuan xiao huan School of Computer Science Beijing University of Posts and Telecommunications School of Computer Science Beijing University of Technology

A new Network Coding mechanism in WSNs(Wireless Sensor Networks), which is named COEQ and aims at balancing coding opportunities, energy and QoS, is proposed and analyzed. Implemented on the basis of traditional AODV protocol, COEQ evaluates several metrics of paths comprehensively with TOPSIS method including minimum remaining energy, coding opportunities, QoS and so on, so as to select the optimal transmitting route. Experiments on NS[2] show that COEQ can improve throughput and save energy when the transmitting rate is low.

关键词： network coding wireless sensor network QoS TOPSIS

Control of mould level fluctuation through the modification of steel composition

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International Journal of Minerals,Metallurgy and Materials 2013年第2期20卷 138-145页

作者： Yang Li xiao-huan Zhang Peng Lan Jia-quan Zhang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

Periodic mould level fluctuation （MLF） during slab casting is a bottleneck for upgrading the surface quality and casting speed especially for hypoperitectic （HP） or ultralow carbon steels. The uneven growth of the initially solidified shell is verified to be one of the important inducements to MLF due to related unsteady bulging in the secondary cooling zone. It is shown that the solidification mode of steels and the contraction behavior can be modified through chemical composition optimization within given composition limits, For high strength low alloy （HSLA） steels, the actual peritectic points calculated by Thermo-Calc software may change remarkably with the slight variations of alloying element contents. Accordingly, the narrow limit of chemical composition of HP steels through optimization is proven to be one of the effective factors to control the popular MLF phenomenon during slab casting.

关键词： low carbon steel continuous casting solidification composition optimization

Sulfonylcalix[4]arene-based metal-organic polyhedra with hierarchical porous structures for efficient Xe/Kr separation

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Nano Research 2023年第2期16卷 2536-2542页

作者： Wei-Long Shan Mao-Lian Xu huan-huan Hou Peng Zhao qing-Yun Zhang Meng-Jia Yin Feng Luo School of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan 243002China State key Laboratory of Nuclear Resources and Environment School of ChemistryBiology and Material ScienceEast China University of TechnologyNanchang 330013China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Multiple space from the interior of metal-organic polyhedra(MOPs),the exterior among MOPs,and the inherent nature of big organic molecules makes MOPs as promising platform with hierarchical porous structures,especially when well-elucidated reticular chemistry principles were *** we describe the preparation of a series of isoreticular octahedral MOPs featuring Zn4-p-tert-butylsulfonylcalix[4]arene clusters by the metal-directed assembly of three rigid organic ligands with different *** hydrogen-bonds and hydrophobic interactions between sulfonylcalix[4]arene groups direct the stacking of discrete MOPs into a novel permanent hierarchical porous *** importantly,the optimal MOP 1-Zn exhibits high adsorption capacity of Xe and excellent Xe/Kr(20/80,v/v)separation performance,as demonstrated by adsorption isotherms,breakthrough experiments,and density functional theory ***,grand canonical Monte Carlo(GCMC)and dispersion-corrected density functional theory(DFT-D)theoretical calculations provide molecular-level insight over the adsorption/separation mechanism.

关键词： metal-organic polyhedral sulfonylcalixarene hierarchical porous material Xe/Kr separation