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Application of Visible/Near-Infrared Spectroscopy and Hyperspectral Imaging with Machine Learning for High-Throughput Plant Heavy Metal Stress Phenotyping:A Review

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Plant Phenomics 2023年第4期5卷 657-672页

作者： Yuanning Zhai Lei Zhou Hengnian Qi Pan gao chu Zhang School of Information Engineering Huzhou UniversityHuzhou 313000China College of Mechanical and Electronic Engineering Nanjing Forestry UniversityNanjing 210037China College of Information Science and Technology Shihezi UniversityShihezi 832003China

Heavy metal pollution is becoming a prominent stress on *** contaminated with heavy metals undergo changes in external morphology and internal structure,and heavy metals can accumulate through the food chain,threatening human *** heavy metal stress on plants quickly,accurately,and nondestructively helps to achieve precise management of plant growth status and accelerate the breeding of heavy metal-resistant plant *** chemical reagent-based detection methods are laborious,destructive,time-consuming,and *** internal and external structures of plants can be altered by heavy metal contamination,which can lead to changes in plants'absorption and reflection of ***/near-infrared(V/NIR)spectroscopy can obtain plant spectral information,and hyperspectral imaging(HSI)can obtain spectral and spatial information in simple,speedy,and nondestructive *** 2 technologies have been the most widely used high-throughput phenotyping technologies of *** review summarizes the application of V/NIR spectroscopy and HSI in plant heavy metal stress phenotype analysis as well as introduces the method of combining spectroscopy with machine learning approaches for high-throughput phenotyping of plant heavy metal stress,including unstressed and stressed identification,stress types identification,stress degrees identification,and heavy metal content *** vegetation indexes,full-range spectra,and feature bands identified by different plant heavy metal stress phenotyping methods are *** advantages,limitations,challenges,and prospects of V/NIR spectroscopy and HSI for plant heavy metal stress phenotyping are *** studies are needed to promote the research and application of V/NIR spectroscopy and HSI for plant heavy metal stress phenotyping.

关键词： Infrared consuming precise

Investigation of stress corre-sion cracking under anodic dissolution control

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Chinese Science Bulletin 2001年第9期46卷 717-722页

作者： Wuyang chu Lijie Qiao Kewei gao Univ Sci & Technol Beijing Dept Mat Phys Beijing 100083 Peoples R China

This review is about stress corrosion cracking (SCC) under anodic dissolution control. The section 1 is the methods distinguishing SCC controlled by anodic dissolution from those by hydrogen. The section 2 presents hydrogen-enhanced corrosion and SCC under anodic dissolution control. The section 3 demonstrates corrosion-enhanced localized plasticity and corrosion-induced deformation localization, which are the fundaments of new mechanism of SCC. The section 4 is an overview of the proposed mechanisms of SCC under anodic dissolution control. The last section proposes a new mechanism of SCC.

关键词： stress corrosion cracking hydrogen induced cracking dislocation.

Robust stability analysis of networked control systems

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控制理论与应用（英文版） 2009年第3期7卷 301-306页

作者： Jinfeng gao Hongye SU Jian chu Institute of Automation Zhejiang Sci-Tech University Hangzhou Zhejiang 310018 China Institute of Advanced Process Control Zhejiang University Hangzhou Zhejiang 310027 China

This paper is concerned with the problem of robust stability analysis for networked control systems （NCSs）. A new NCS model is proposed under consideration of both the network-induced delay and parameter uncertainties. The parameter uncertainties appearing in NCSs are norm-bounded, and possibly time-varying. The conventional method and the descriptor system method are used to obtain maximum allowable delay bound （MADB） guaranteeing robust stability and stability of the NCSs, respectively, where the stability criteria are formulated in terms of linear matrix inequalities （LMIs）. And the MADB can be derived by solving the feasibility problem of the corresponding LMI. Some numerical examples are provided to illustrate the effectiveness of the proposed method.

关键词： Robust control Time-delay system Networked control systems (NCSs) Linear matrix inequality (LMI)

A Survey on Human Performance Capture and Animation

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Journal of Computer Science & Technology 2017年第3期32卷 536-554页

作者： Shihong Xia Lin gao Yu-Kun Lai Ming-ze Yuan Jinxiang Chai Advanced Computing Research Laboratory Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China School of Computer Science and Informatics Cardiff University Cardiff CF243AA U.K. University of Chinese Academy of Sciences Beijing 100049 China Department of Computer Science and Engineering Texas A&M University College Station Texas 77843-3112 U.S.A.

With the rapid development of computing technology, three-dimensional （3D） human body models and their dynamic motions are widely used in the digital entertainment industry. Human performance mainly involves human body shapes and motions. Key research problems in human performance animation include how to capture and analyze static geometric appearance and dynamic movement of human bodies, and how to simulate human body motions with physical effects. In this survey, according to the main research directions of human body performance capture and animation, we summarize recent advances in key research topics, namely human body surface reconstruction, motion capture and synthesis, as well as physics-based motion simulation, and further discuss future research problems and directions. We hope this will be helpful for readers to have a comprehensive understanding of human performance capture and animation.

关键词： human surface reconstruction body motion capture motion synthesis physics-based motion simulation

Effect of grain structure on the mechanical properties of a Monel alloy fabricated by laser-based directed energy deposition

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Journal of Materials Science & Technology 2023年第33期164卷 129-139页

作者： ze Chen Wei Fan Shubo gao Yang Qi Sastry Yagnanna Kandukuri Kun Zhou Singapore Centre for 3D Printing School of Mechanical and Aerospace EngineeringNanyang Technological University50 Nanyang AvenueSingapore 639798Singapore DNV AS HøvikOslo 1363Norway

Monel K-500 is a Ni–Cu alloy widely used in the marine and offshore industry due to their superior resistance to corrosion in seawater and hence easily *** address this problem,laser-based directed energy deposition(LDED)is used to repair or refabricate these high-value worn *** optimize the mechanical properties of repaired parts,the commonly applied solution and aging is not ideal because it also changes the properties of the base ***,in situ control of the grain structures during the LDED process becomes an effective approach for high-performance *** this study,we fabricated a duplex grain structure with small grain size and low texture intensity using low laser power and scanning *** duplex microstructure consists of short columnar grains and zigzag-distributed fine equiaxed *** formation of this grain structure is dependent on both the solidification and recrystallization *** strength of this grain structure is improved to 523.5 MPa without the sacrifice of ductility,which is instead 20%higher than that of the counterpart consisting of typical columnar grains due to the grain refinement and crack *** mechanical properties of the alloy with the duplex grain structure are even comparable to heat-treated Monel K-500 fabricated by wire arc additive *** work provides valuable insights into the in situ optimization of the microstructure and mechanical properties of LDED-fabricated parts.

关键词： Additive manufacturing Directed energy deposition Monel alloy Grain structure Mechanical properties

Photochemical degradation of typical halogenated herbicide 2,4-D in drinking water with UV/H_(2)O_(2)/micro-aeration

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Science China Chemistry 2009年第12期52卷 2351-2357页

作者： chu WenHai gao NaiYun LI Chong CUI Jing State Key Laboratory of Pollution Control and Resources Reuse Tongji UniversityShanghai 200092China Department of Civil and Structure Engineering Hong Kong Polytechnic UniversityHong KongChina

UV/H2O2/micro-aeration is a newly developed process based on UV/H2O2. Halogenated pesticide 2,4-dichlorophenoxyacetic acid (2,4-D) photochemical degradation in aqueous solution was studied under various solution conditions. The UV intensity,initial 2,4-D concentrations and solution temperature varied from 183.6 to 1048.7 μW·cm-2,from 59.2 to 300.0 μg·L-1 and from 15 to 30℃,respectively. The concentration of hydrogen peroxide (H2O2) and pH ranged from 0 to 50 mg·L-1 and 5 to 9,and different water quality solutions (tap water,distilled water and deionized water) were examined in this study. With initial concentration of about 100 μg·L-1,more than 95.6% of 2,4-D can be removed in 90 min at intensity of UV radiation of 843.9 μW·cm-2,H2O2 dosage of 20 mg·L-1,pH 7 and room temperature. The removal efficiency of 2,4-D by UV/H2O2/micro-aeration process is better than UV/H2O2 process. The photodecomposition of 2,4-D in aqueous solution follows pseudo-first-order kinetics. 2,4-D is greatly affected by UV irradation intensity,H2O2 dosage,initial 2,4-D concentration and water quality solutions,but it appears to be slightly influenced by pH and temperature. There is a linear relationship between rate constant k and UV intensity and initial H2O2 concentration,which indicates that higher removal capacity can be achieved by the improvement of these factors. Finally,a preliminary cost analysis reveals that UV/H2O2/micro-aeration process is more cost-effective than the UV/H2O2 process in the removal of 2,4-D from drinking water.

关键词： 2,4-dichlorophenoxyacetic acid endocrine disrupting chemicals photochemistry advanced oxidation processes pollution control cost analysis

Self-powered anti-interference photoelectrochemical immunosensor based on Au/ZIS/CIS heterojunction photocathode with zwitterionic peptide anchoring

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Chinese Chemical Letters 2022年第11期33卷 4750-4755页

作者： ze Hu Yaqun Xu Hao Wang gao-Chao Fan Xiliang Luo Shandong Key Laboratory of Biochemical Analysis College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Accurate detection of important biomarkers with ultra-low levels in complex biological matrix is one of the frontier scientific issues because of possible signal interference of potential reductive agents and protein ***,a self-powered anti-interference photoelectrochemical(PEC)immunosensor was explored for sensitive and specific detection of model target of cardiac troponinⅠ(cTnI).Specifically,a novel ternary heterojunction served as the photocathode to offer a remarkable current output and a zwitterionic peptide was introduced to build a robust antifouling ***(CIS)film with porous network nanostructure was first prepared and then modified in order with ZnInS(ZIS)nanocrystals and Au nanoparticles to fabricate the Au/ZIS/CIS heterojunction *** capture cTnI antibody(Ab)was immobilized,the zwitterionic peptide KAEAKAEAPPPPC was then anchored to compete the *** elaborated PEC immunosensor exhibited high sensitivity for target cTnI antigen(Ag)detection,with good anti-interference against reductive agents and nonspecific *** integration strategy of heterojunction photocathode with zwitterionic peptide provides a new sight to develop advanced PEC immunosensors applying in practical biosamples.

关键词： Photoelectrochemistry Immunoassay Zwitterionic peptide Photocathode Anti-interference

Removal of phenol by powdered activated carbon adsorption

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Frontiers of Environmental Science & Engineering 2013年第2期7卷 158-165页

作者： Yan MA Naiyun gao Wenhai chu Cong LI State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China Institute of Municipal Engineering Zhejiang University Hangzhou 310058 China

In this study, the adsorption performance of powdered activated carbon （PAC） on phenol was investi- gated in aqueous solutions. Batch adsorption studies were performed to evaluate the effects of various experimental parameters like PAC type, PAC dose, initial solution pH, temperature and pre-oxidation on the adsorption of phenol by PAC and establish the adsorption kinetics, thermo- dynamics and isothermal models. The results indicated that PAC adsorption is an effective method to remove phenol from water, and the effects of all the five factors on adsorption of phenol were significant. The adsorption rate of phenol by PAC was rapid, and more than 80% phenol could be absorbed by PAC within the initial 10 min. The adsorption process can be well described by pseudo- second-order adsorption kinetic model with rate constant amounted to 0.0313, 0.0305 and 0.0241 mg.μg .min -1 with coal, coconut shell and bamboo charcoal. The equilibrium data of phenol absorbed onto PAC were analyzed by Langmuir, Freundlich and Tempkin adsorp- tion isotherms and Freundlich adsorption isotherm model gave the best correlation with the experimental data. Thermodynamic parameters such as the standard Gibbs free energy （△G0）, enthalpy （△H0） and entropy （△S0） obtained in this study indicated that the adsorption of phenol by PAC is spontaneous, exothermic and entropy decreasing.

关键词： phenol powdered activated carbon adsorption kinetics isotherms

Investigation of dynamic processing on aluminum floc aggregation:Cyclic shearing recovery and effect of sulfate ion

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Science China Chemistry 2008年第4期51卷 386-392页

作者： chu YongBao gao BaoYu YUE QinYan WANG Yan School of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China School of Environmental Science and Engineering Shandong UniversityJinan 250100China

The floc formation and re-aggregation potential and the effects of sulfate on coagulation by AlCl3, polyaluminum chloride (PAC), and Al13 species using a photometric dispersion analyzer (PDA) are in- vestigated. It is found that the recovery level from shearing is the highest for the Al13 species. This is likely a result of increased collision efficiency due to more effective charge neutralization. The ex- perimental results show that sulfate has a significant effect on coagulation and promoting aggregation of hydrolyzed species for the Al13 species. It results in significant improvement of the coagulation effi- ciency through an electrostatic patch effect. The results further indicate that zeta potential of the parti- cle suspension is not the only indicator for the coagulant efficiency when precipitate formation sig- nificantly improves coagulation.

关键词： Al13 species coagulation dynamics polyaluminum chloride (PAC) sulfate