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Adaptive segmentation of digital mammograms through reinforcement learning

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光学精密工程 2005年第5期13卷 575-583页

作者： lIU Xin-yue FANG Xiao-xuan huang lian-qing Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of SciencesChangchun 130033 China China-Japan Union Hosptial of Jilin University Changchun 130033China

An approach based on reinfocement learning for the automated segmentation is presented. The approach consists of two modules:segmentation module and learning module. The segmentation module uses the region-growing algorithm combined with the smooth filtering and the morphological filtering to segment mammograms. The learning module uses the segmentation output as the feedback to learn to select the optimal parameter settings of the segmentation algorithm according to the image properties using reinforcement learning techniques. The approach can adapt itself to various kinds of mammograms through training and therefore obviates the tedious and error-prone tuning of parameter settings manually. Quantitative test results show that the approach is accurate for several kinds of mammograms. Compared to previously proposed approaches,the approach is more adaptable to different mammograms.

关键词：适应性分割平滑性计算机控制系统程序设计

Numerical study of Classical and Composite solar Walls by TRNsYs

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Journal of Thermal science 2007年第1期16卷 46-55页

作者： Jibao sHEN stéphane lAssUE laurent ZAlEWsKI Dezhong huang school of Engineering Shaoxing College of Arts and Sciences Shaoxing University Zhejiang 312000 China laboratoire d＇Artois de MéThermique et Instrumentation （lAMTI） Faculté des Sciences Appliquées Univeristé d＇Artois 62400 Béthune France

The laboratory lAMTI has worked for several years on the study and the optimization of the thermal performances of passive solar walls like solar Trombe wall. These components of the buildings envelope have very complex behaviour because they are the seat of various coupled heat transfers modes and are subjected to the random variations of the meteorological parameters. Using the finite difference method （FDM） and starting from experimental results recorded during several years, a simulation model was developed and validated concerning the ＂composite＂ Trombe wall. In order to make this work more accessible to the community of the heat engineers, it appears interesting to build a simulation model which can be integrated into the library of elements of the TRNsYs software. A ＂Type＂ was thus carried out and the results obtained compared with those of the FDM model. In this work we compare the obtained results with these two numerical ways. The assumptions and the results of simulations are also confronted with those of an existing module in TRNsYs （Type 36） established for the ＂classical＂ Trombe wall. The study shows that the models that we developed are very precise and that certain assumptions must be used with a lot of precautions. The advantages of the composite Trombe solar wall compared to the Classical Trombe wall are highlighted for cold and/or cloudy climates.

关键词： Trombe wall solar wall classical wall composite wall finite difference method TRNsYs

Enhanced atrazine removal using membrane bioreactor bioaugmented with genetically engineered microorganism

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Frontiers of Environmental science & Engineering 2008年第4期2卷 452-460页

作者： Chun lIU Xia huang state Key Joint laboratory of Environmental simulation and Pollution Control Department of Environmental Science and EngineeringTsinghua UniversityBeijing 100084China school of Environmental science and Engineering Hebei University of Science and TechnologyShijiazhuang 050018China

Bioaugmentation with genetically engineered microorganisms(GEMs)in a membrane bioreactor(MBR)for enhanced removal of recalcitrant pollutants was *** atrazine-degrading genetically engineered microorganism(GEM)with green fluorescent protein was inoculated into an MBR and the effects of such a bioaugmentation strategy on atrazine removal were *** results show that atrazine removal was improved greatly in the bioaugmented MBR compared with a control *** a start-up period of 6 days,average 94.7%of atrazine was removed in bioaugmentedMBRwhen atrazine concentration of influent was 14.5 mg/*** volumetric removal rates increased linearly followed by atrazine loading increase and the maximum was 65.5 mg/(l?d).No negative effects were found on COD removal although carbon oxidation activity of bioaugmented sludge was lower than that of common *** inoculation,adsorption to sludge flocs was favorable for GEM *** GEM population size initially decreased shortly and then was kept constant at about 104–105 CFU/*** of micro-organisms played an important role in the decay of the GEM *** leakage from MBR was less than 102 CFU/ml initially and was then *** contrast,in a conventionally activated sludge bioreactor(CAs),sludge bulking occurred possibly due to atrazine exposure,resulting in bioaugmentation failure and serious GEM *** MBR was superior to CAs in atrazine bioaugmentation treatment using GEM.

关键词： genetically-engineered microorganism(GEM) membrane bioreactor(MBR) atrazine

A nature-inspired concise synthesis of(+)-ent-chromazonarol

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science China Chemistry 2013年第3期56卷 349-361页

作者： huang JieHui lEI XiaoGuang College of Pharmaceutical science and Technology Tianjin University National Institute of Biological sciences(NIBs)

A large number of sesquiterpene quinone/hydroquinone natural products including(+)-ent-chromazonarol have been isolated and received great attention from the synthetic ***,we report a nature-inspired concise synthesis of(+)-ent-chromazonarol in 4 steps from a readily available starting *** synthesis relied on a lewis acid mediated cyclization which correctly installed two vicinal stereocenters in one *** highly efficient synthetic route allows us to further prepare natural product congeners for further biological studies.

关键词： sesquiterpene hydroquinone total synthesis chromazonarol

Hydrolyzed Al(Ⅲ) clusters:speciation stability of nano-Al_(13)

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Journal of Environmental sciences 2011年第5期23卷 705-710页

作者： shuifeng Wang Chihpin huang Christopher W K. Chow Research Center for Eco-Environmental sciences Chinese Academy of Sciences Beijing 100085 China. E-mail: wgds@*** Institute of Environmental Engineering National Chiao Tung University Hsinchu Taiwan China Australian Water Quality Centre SA Water Corporation 250 Victoria Square Adelaide SA 5000 South Australia

Pure nano-All3 and aggregates at various concentrations were prepared to examine the particle size effect of coagulation with inorganic polymer flocculant. The property and stability of various species formed were characterized using Infrared, 27Al-NMR, photo correlation spectroscopy （PCs）, and Ferron assay. Results showed that concentration and temperature exhibited different roles on the stability of Al13. The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that of Al13, which has been confirmed in a dimension range of 1-2 nm by PCs. Al13 solutions at high concentrations （0.5-2.11 tool/l） were observed to undergo further aggregation with aging. The aggregates with a wide particle size distribution would contribute to the disappeared/decreased Al13 basis on the eTA1-NMR spectrum, whereas a part of Al13 would still remain as Alb. At low concentrations, All3 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90~C.

关键词： nano-All3 clusters inorganic polymer flocculant speciation stability

A dynamical transition of a chain of charged particles in a 2D substrate potential

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Communications in Theoretical Physics 2020年第7期72卷 116-122页

作者： Xiao-Ping Yuan li-Yan Qiao Xia huang Information Engineering school Hangzhou Dianzi UniversityHangzhou 310018China Department of Physics Hangzhou Dianzi UniversityHangzhou 310018China school of Mathematics and Physics North China Electric Power UniversityBeijing 102206China

The transport of a chain of charged particles with a transverse degree of freedom is investigated in a 2D asymmetric ***,the energy of the periodic driving force is converted into motion in the vertical *** analysis exhibits a transition from stick-slip motion to periodic *** chain velocity can be controlled to an optimized value by adjusting system parameters,such as the amplitude and frequency of the periodic *** existence of a resonance platform indicates resonance between the motion of the chain and the periodic force as coupling strength increases *** atomic configuration and the transverse degree of freedom also play key roles in the control.

关键词： collective transport driven Frenkel–Kontorova model cooperative ratchet

Improved authenticated key agreement protocol based on Bi-IsIs problem

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The Journal of China Universities of Posts and Telecommunications 2020年第3期27卷 93-102页

作者： Yang Yatao Zhang Juanmei huang Jierun Zhang Yaze Department of Electronic and Communication Engineering Beijing Electronic Science and Technology InstituteBeijing 100070China Department of Cryptography science and Technology Beijing Electronic Science and Technology InstituteBeijing 100070China school of Telecommunication Engineering Xidian UniversityXi'an 710071China

In the post quantum era,public key cryptographic scheme based on lattice is considered to be the most promising cryptosystem that can resist quantum computer ***,there are still few efficient key agreement protocols based on lattice up to *** solve this issue,an improved key agreement protocol with post quantum security is ***,by analyzing the Wess-Zumino model+(WZM+)key agreement protocol based on small integer solution(sIs)hard problem,it is found that there are fatal defects in the protocol that cannot resist man-in-the-middle *** based on the bilateral inhomogeneous small integer solution(Bi-IsIs)problem,a mutual authenticated key agreement(AKA)protocol with key confirmation is proposed and *** with Diffie-Hellman(DH)protocol,WZM+key agreement protocol,and the AKA agreement based on the ideal lattice protocol,the improved protocol satisfies the provable security under the extend Canetti-Krawczyk(eCK)model and can resist man-in-the-middle attack,replay attack and quantum computing attack.

关键词： lattice small integer solution problem key agreement protocol provable security eCK model

Purification and Characterization of a New Heme-Binding （HBP59） from the Mutant strain DJ35 of Azotobacter vinelandii

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Journal of Integrative Plant Biology 2007年第3期49卷 336-342页

作者： shao-Min Bian huang-Ping Wang Hui-Na Zhou Ying Zhao Jian-Feng Zhao Ju-Fu huang Key laboratory of Photosynthesis and Environmental Molecular Physiology Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Bioengineering College Fujian Normal University Fuzhou 350007 China Graduate school the Chinese Academy of Sciences Beijing 100039 China

A new protein, an approximately 59-kDa monomer containing iron atoms, was first isolated from the mutant strain DJ35 of Azotobacter vinelandii llpmann. After analysis by matrix-assisted laser desorptlon ionization time-of-flight mass spectrometry, the protein was Identified as the product of a predicted gene. Thus, the protein was tentatively called HBP59. Its absorption spectra （ABs） In the reduced state exhibited three peaks at 421,517, and 556 nm and the maximal peak was shifted from 421 to 413 nm after exposure of HBP59 to air. The soret circular dichrolsm （CD） spectrum of HBP59 In the reduced state displayed four positive peaks at 364, 382, 406, and 418 nm and two negative peaks at 398 and 433 nm; the △ε （CD extinction coefficient） values of these peaks were found to be 0.92, 0.58, 0.87, 0.72, -0.65 and -1.12 l/mol per cm, respectively. Titration with heme showed that the protein has 0.1 heme molecules/protein molecule. After HBP59 had fully Interacted with heme, Its maximal ABs value and soret CD Intensity were increased by approximately 10-fold compared with values before Interaction. Therefore, It seems that one molecule of HBP59 can be interacted with only one heme. These results indicate that HBP59 contains heme with low spin and may be Involved In heme utilization or adhesion.

关键词： absorption spectra Azotobacter vinelandii characterization by matrix-assisted laser desorption ionization time-of-flight (MAlDI-TOF) circular dichroism spectra and titration heme-binding protein (HBP59) mutant strain DJ35 purification

Recent development in the application of bulk metallic glasses

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Journal of Materials science & Technology 2022年第36期131卷 115-121页

作者： K.Gao X.G.Zhu l.Chen W.H.li X.Xu B.T.Pan W.R.li W.H.Zhou l.li W.huang Y.li Dongguan Yihao Metal Technology Co.ltd Dongguan 523686China Dongguan Eontec Co.ltd Dongguan 523686China shenyang National laboratory for Materials science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Over the past decades,considerable efforts have been made in the commercial application of bulk metallic glasses(BMGs).Despite great challenges faced by the industrial players,significant progress has been achieved,and millions of commercial products for various kinds of applications have been shipped around the *** in this paper,we shall present the alloys suitable for the actual products in the application and discuss the merits of the processing technique of BMGs over the existing processing techniques and *** importantly we demonstrate the typical examples of products over the past few ***,future directions of the industrialization of BMGs are also discussed.

关键词： Bulk metallic glasses Commercial application Alloy design Products