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Predictive Vegetation Mapping Approach Based on Spectral Data, DEM and Generalized Additive Models

Chinese Geographical Science 2013年第3期23卷 331-343页

作者： SONG Chuangye HUANG Chong liu huiming State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Satellite Environment Centre Ministry of Environmental Protection

This study aims to provide a predictive vegetation mapping approach based on the spectral data, DEM and Generalized Additive Models (GAMs). GAMs were used as a prediction tool to describe the relationship between vegetation and environmental variables, as well as spectral variables. Based on the fitted GAMs model, probability map of species occurrence was generated and then vegetation type of each grid was defined according to the probability of species occurrence. Deviance analysis was employed to test the goodness of curve fitting and drop contribution calculation was used to evaluate the contribution of each predictor in the fitted GAMs models. Area under curve (AUC) of Receiver Operating Characteristic (ROC) curve was employed to assess the results maps of probability. The results showed that: 1) AUC values of the fitted GAMs models are very high which proves that integrating spectral data and environmental variables based on the GAMs is a feasible way to map the vegetation. 2) Prediction accuracy varies with plant community, and community with dense cover is better predicted than sparse plant community. 3) Both spectral variables and environmental variables play an important role in mapping the vegetation. However, the contribution of the same predictor in the GAMs models for different plant communities is different. 4) Insufficient resolution of spectral data, environmental data and confounding effects of land use and other variables which are not closely related to the environmental conditions are the major causes of imprecision.

关键词： vegetation mapping Generalized Additive Models (GAMs) SPOT Receiver Operating Characteristic (ROC) GeneralizedRegression Analysis and Spatial Predictions (GRASP) Huanghe River Delta

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A spatial frequency/spectral indicator-driven model for estimating cultivated land quality using the gradient boosting decision tree and genetic algorithm-back propagation neural network

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International Soil and Water Conservation Research 2022年第4期10卷 635-648页

作者： Ziqing Xia Yiping Peng Chenjie Lin Ya Wen huiming liu Zhenhua liu College of Natural Resources and Environment South China Agricultural UniversityGuangzhou510642China

Cultivated land quality(CLQ)is related to national food *** and high-precision monitoring of CLQ is crucial for the sustainable development of ***,current satellite image-based evaluation methods that only consider the crop's spatial spectrum characteristics in the key growth stages cannot accurately estimate *** study proposes a new method based on time-series spectral data of crop growth to improve the accuracy of CLQ *** study was conducted in the Conghua District of Guangzhou,Guangdong Province,*** results showed that seven spectral indicators were determined as the optimal indicators based on the gradient boosting decision tree(GBDT)and variance inflation factor(VIF).And the genetic algorithm-back propagation neural network(GA-BPNN)model provided more accurate CLQ estimates than the partial least squares regression(PLSR)model,indicating a nonlinear relationship between CLQ and the *** addition,the GA-BPNN model with a normalized root mean square error(NRMSE)of 9.91%demonstrates the excellent potential for mapping CLQ over large *** model based on the seven optimal indicators of crop phenology provided higher accuracy than the GA-BPNN model based on the normalized difference vegetation index(NDVI)indicators in the spatial domain,significantly decreasing the NRMSE of the CLQ estimates by 3.17%.This further implied that the spectral indicators in the spatial frequency domain can improve the accuracy of estimating CLQ.

关键词： Cultivated land quality Time-series spectral data Spectral indicators Spatial frequency domain Conghua district

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Reduced graphene oxide with a highly restored π-conjugated structure for inkjet printing and its use in all-carbon transistors

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Nano Research 2013年第11期6卷 842-852页

作者： Yang Su Jinhong Du Dongming Sun Chang liu huiming Cheng Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences 72 Wenhua RoadShenyang 110016 China

An inkjet-printed graphene film is of great importance for next-generation flexible, low cost and high performance electronic devices. However, due to the limitation of the inkjet printing process, the electrical conductivity of inkjet-printed graphene films is limited to N10 S＇cm-1, and achieving a high conductivity of the printed graphene films remains a big challenge. Here, we develop a ＂weak oxidation- vigorous exfoliation＂ strategy to tailor graphene oxide （GO） for meeting all the requirements of highly conductive inkjet-printed graphene films, including a more intact carbon plane and suitable size. The -conjugated structure of the resulting graphene has been restored to a high degree, and its printed films show an ultrahigh conductivity of -420 S-cm-I, which is tens of times higher than previously reported results, suggesting that, aside from developing a highly efficient reduction method, tuning the GO structure could be an alternative way to produce high quality graphene sheets. Using inkjet-printed graphene patterns as source/drain/gate electrodes, and semiconducting single-walled carbon nanotubes （SWCNTs） as channels, we fabricated an all-carbon field effect transistor which shows excellent performance （an on/off ratio of -104 and a mobility of -8 cm2＂V-l＇s-1） compared to previously reported CNT-based transistors, promising the use of nanocarbon materials, graphene and SWCNTs in printed electronics, especially where high performance and flexibility are needed.

关键词： inkjet printing graphene oxide high conductivity field effect transistor

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Formation mechanism of carbonates in the lacustrine muddy shale and it implication for shale oil and gas: A case study of source rocks in Member 4 and Member 3 of Shahejie Formation, Dongying sag

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Petroleum Research 2018年第3期3卷 248-258页

作者： Yong Wang huiming liu Guoqi Song Xuefeng Hao Deshun Zhu Deyan Zhu Exploration and Development Institute Sinopec Shengli Oilfield CompanyShandong 257015China Sinopec Shengli Oilfield Company Shandong 257001China

Through analysis of microscopic characteristics,mineral components,elements and isotopes,the genetic mechanism of carbonates in the deep lacustrine source rocks in the upper submember of Member 4 and lower submember of Member 3 of Shahejie Formation in Dongying sag,is well *** results show that four types of carbonates in the deep lake,i.e.,lenticular coarse crystalline carbonate,lamellar micro-fine crystalline carbonate,lamellar cryptocrystalline carbonate and massive cryptocrystalline *** which,the lenticular coarse crystalline carbonate is formed by diagenetic *** the lamellar micro-fine crystalline carbonate and the lamellar cryptocrystalline carbonate,through the alga photosynthesis,the carbon dioxide(CO_(2))is constantly extracted from water,thus the concentration of CO_(3)^(-2) ion in water increases,and then the CO_(3)^(-2) ion reacts with Ca2+ ion in lake water surface to form the carbonates;the saline water environment is favorable for preservation of carbonate particles which mostly occur in lamellar micro-fine crystalline;in the brackish water environment,the water is deep,and the carbonate crystalline beneath the carbonate compensation depth surface is usually is dissolved,and most of lamellar cryptocrystalline are *** massive cryptocrystalline carbonate is formed by the sedimentary carbonate which transport from shallow water to deep water by gravity *** some extent,the carbonates control reservoir property and compressibility of muddy shale in the upper submember of Member 4 and lower submember of Member 3 of Shahejie Formation in Dongying sag,and provide important information for reconstruction of sedimentary environment of the ancient lake.

关键词： Formation mechanism Lacustrine facies Carbonate Muddy shale Shahejie formation Dongying sag

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Dielectric AlN/epoxy and SiC/epoxy composites with enhanced thermal and dynamic mechanical properties at low temperatures

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Progress in Natural Science:Materials International 2022年第3期32卷 304-313页

作者： Zhengrong Zhou Rongjin Huang huiming liu Yalin Zhao Zhicong Miao Zhixiong Wu Wanyin Zhao Chuanjun Huang Laifeng Li State Key Laboratory of Technologies in Space Cryogenic Propellants Technical Institute of Physics and Chemistry Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

In a superconducting magnet, the thermal properties of the insulating material at low temperatures is an important technical index to ensure the normal operation of a superconducting coil. Herein, a low-temperature thermal conductivity testing device with a tiny uncertainty was developed to measure the composites. Furthermore, Si C/epoxy and Al N/epoxy composites were prepared and their properties were tested at low *** results showed that the composites have a better thermal conductivity at low temperatures than pure *** addition, the Al N/epoxy and Si C/epoxy composites have excellent dynamic mechanical properties and low coefficient of thermal expansion. Due to the fair thermal and dynamic mechanical properties, the composites will have potential application in the superconducting magnet.

关键词： Thermal properties Epoxy composites Low temperatures

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Application of high density resistivity method in accuracy of goaf detection

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Global Geology 2011年第2期14卷 110-114页

作者： liu huiming LI Guangjie DU Lizhi College of Construction Engineering Jilin University Changchun 130026 China

Based on the relationship between the diameter and buried depth of goal, the authors establish the forward modeling by Res2dmod and inverse the model by Res2dinv. Thus, three kinds of models are obtained ： the model of single resistivity anomalous body, model of double different distance resistivity anomalous body, and model of layered resistivity anomalous body. Using forward and inversion, the image of detection is simulated, and the reliability is proved by comparing with the engineering examples.

关键词： high density resistivity method inversion goaf

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Influence of nanometric CeO2 coating on high temperature oxidation of Cr

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Progress in Natural Science:Materials International 2007年第5期17卷 601-606页

作者： Jin huiming , Zhang Linnan and liu Xiaojun (Materials Research Center, Department of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China College of Materials Science and Engineering, North-East University, Shenyang 110014, China) Materials Research Center Department of Mechanical Engineering Yangzhou University Yangzhou 225009 China College of Materials Science and Engineering North-East University Shenyang 110014 China

Isothermal and cyclic oxidation behavior of chromium and its superficially applied nanometric CeO2 samples were studied at 900℃in air. Scanning electronic microscopy (SEM), transmission electronic microscopy (TEM) and high resolution electronic microscopy (HREM) were used to examine the morphology and micro-structure of oxide films. It was found that ceria addition greatly improved the anti-oxidation ability of Cr both in isothermal and cyclic oxidizing experiments. Acoustic emission (AE) technique was used in situ to monitor the cracking and spalling of oxide films, and AE signals were analyzed in time-domain and number-domain according to the related oxide fracture model. Laser Raman spectrometer was also used to study the stress status of oxide films formed on Cr with and without ceria. The main reason for the improvement in anti-oxidation of chromium was that ceria greatly reduced the growing speed and grain size of Cr2O3. This fine-grained Cr2O3 oxide film might have better high temperature plasticity and could relieve parts of compressive stress by means of creeping, and maintained the ridge character and relatively low internal stress level. Meanwhile, ceria application reduced the size and the number of interfacial defects, while remarkably enhanced the adhesive property of Cr2O3 oxide scale formed on Cr substrate.

关键词： oxidation stress CeO2 nanoparticle coating chromium.

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Fault Diagnosis of Rolling Bearing Based on WT-VMD and Random Forest

Fault Diagnosis of Rolling Bearing Based on WT-VMD and Rando...

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第32届中国控制与决策会议

作者： Hana Zhu Xueying Li huiming liu College of Automation and Electronic Engineering Qingdao University of Science and Technology

This paper presents a fault diagnosis method based on wavelet threshold（WT）,variational mode decomposition（VMD） and random ***,wavelet threshold method is used to preprocess the original vibration signal to reduce noise interference and enhance fault features;then VMD is used to decompose the denoised signal into several intrinsic mode functions（IMFs） and extract the center frequencies of each IMF;finally,these center frequencies will be input into the random forest classifier as feature vectors for fault type *** with the results of some existing fault diagnosis methods（such as EMD + variable prediction model,VMD + PSO-PNN,VMD + multi-scale permutation entropy + SVM）,it is found that this method greatly improves the accuracy of fault *** research results show that this method can effectively identify various fault types of rolling bearing.

关键词： Wavelet Threshold Variational Mode Decomposition Random Forest Rolling Bearing Fault Diagnosis

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Heritability of growth traits in the Asian seabass (Lates calcarifer)

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Aquaculture and Fisheries 2017年第3期2卷 112-118页

作者： Baoqing Ye Ziyi Wan Le Wang Hongyan Pang Yanfei Wen huiming liu Bing Liang Huan Sein Lim Junhui Jiang Genhua Yue Molecular Population Genetics and Breeding Group Temasek Life Sciences LaboratorySingapore 117604Singapore Agri-Food and Veterinary Authority of Singapore 5 Maxwell RoadSingapore 069110Singapore Department of Biological Sciences National University of SingaporeSingapore 117543Singapore School of Biological Sciences Nanyang Technological UniversitySingapore 637551Singapore

Growth is an economically important trait in *** improve growth trait of the Asian seabass(Lates calcarifer)we have been carrying out,since 2004,a selective breeding *** study focuses on growth traits in the F2 fish generation,comprised of offspring from 23 mass crosses from 383 F_(1) *** genotyping analysis for 10 microsatellites from both brood stock and progeny we have reconstructed the pedigree of each *** F_(2) generation at 90 days post hatch(dph),we have recorded body weight(BW)for 12,117 individuals and total length(TL),standard length(SL)and condition factor(K_(tl) and K_(sl))for 3530 individuals;and all five traits for 2136 individuals at 270 *** 90 dph the average BW was 46.88±20.95 *** pedigree information,recorded growth traits and Restricted Maximum Likelihood method,we have estimated that the narrow sense heritability(h^(2))in F_(1) fish for BW,TL,SL,K_(tl) and K_(sl) was at,90 dph,0.12±0.03,0.11±0.03,0.10±0.03,0.20±0.04 and 0.11±0.03,respectively and,at 270 dph,0.34±0.07,0.32±0.07,0.30±0.06,0.13±0.04 and 0.11±0.04,*** 90 dph the realised heritability for BW was *** with F_(1) generation,the growth performance of F_(2) fish was increased by 14.4%.Heritability of growth traits will be useful for future genetic improvement programmes of the Asian seabass.

关键词： Asian seabass Breeding program Growth Heritability DNA marker

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论戏曲程式思维与当代戏剧角色的个性化表达

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戏剧艺术 2024年第3期 166-177页

作者：刘慧明上海戏剧学院舞蹈学院

阿甲先生曾提出“程式思维”之概念,以此为戏曲创造角色的特定思维方式。后继学者与艺术家对这一概念的范畴和意义的阐发,已拓展了阿甲先生的原意。在话剧影视表演领域,此概念强调了通过外部技术带动心理表现的思想方法,以及写意地化戏... 详细信息

阿甲先生曾提出“程式思维”之概念,以此为戏曲创造角色的特定思维方式。后继学者与艺术家对这一概念的范畴和意义的阐发,已拓展了阿甲先生的原意。在话剧影视表演领域,此概念强调了通过外部技术带动心理表现的思想方法,以及写意地化戏曲于话剧影视表演中的表现思维,当代戏剧表演对戏曲借鉴之精髓便在于此。经无数梨园弟子的探索与锤炼,戏曲程式不仅是某种风格性的动作,更是一种创造角色的思维方式——在程式中建立角色的表演底色并发展,在行动、空间营造、缘物寄情中体现民族审美,不见程式而程式已在其中。在这种程式思维下,当代话剧影视表演不仅可以借用戏曲元素来丰富其自身,更可以从戏曲中获取能量之源。

关键词：程式思维话剧影视表演角色当代个性化

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