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Study on Wood Dyeing Pigment Formula Prediction Model based on Dynamic Fuzzy Neural Network

Study on Wood Dyeing Pigment Formula Prediction Model Based ...

2010 2nd International Conference on Computer Engineering and technology(2010年第二届计算机工程与技术国际会议 ICCET 2010)

作者： Xuemei Guan Jun Cao Minghui Guo Information and Computer Engineering College Northeast Forestry University Harbin 150040China Key Laboratory of Bio-based Material Science and technology Northeast Forestry University Harbin 150

ISBN: (纸本)9781424463473

This paper studied a kind of wood dyeing pigment formula prediction model built by using dynamic fuzzy neural network. The relative error of this prediction model was 0.52％ and its training time was 128s. The results were comparatively satisfactory. This method provided a new way for wood dyeing and color matching and a new idea for the applications of its theories in color matching system,so it had certain theoretical research and practical application value.

关键词： computer color matching:dynamic fuzzy neural network (DNFM)

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Upgrading bio-Oil by Additions Across Olefins Over Solid Acid Catalysts

Upgrading Bio-Oil by Additions Across Olefins Over Solid Aci...

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2010中国可再生能源科技发展大会

作者： Zhijun ZHANG Xulai YANG Qingwen WANG Pittman Jr.Charles U Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forest Key Laboratory for Biomass Clean Energy of Anhui Province University of Science and Technology of C Department of Chemistry Mississippi State University Starkville MS 39762 USA

bio-oil from fast biomass pyrolysis has poor fuel properties due to the presence of substantial amounts of water, carboxylic acids, phenolic derivatives, anhydrosugars and other hydroxyl-containing *** must be upgraded to be more combustible, more stable during transport and storage, and to have a higher heating value and lower acidity before engine fuel applications can be *** (HDO) has been tried in the past but large amounts of hydrogen must be consumed to go from 35-50% O to < 1% O to make contemporary type of ***, catalyst coking and low catalyst lifetimes have further prevented a satisfactory progress *** upgrading bio-oil by additions across olefins over solid acids can be carried out at lower temperatures (80-150 ℃) and autogenous *** this approach, bio-oil can be partially refined to combustible and stable oxygen-containing organic fuels and all the original oxygen and all the fuel value in the original bio-oil were *** this study, recent progresses of bio-oil upgrading with olefins were mainly ***, the main problems and future trends of bio-oil upgrading through olefin additions were presented.

关键词： bio-oil upgrading olefin solid acid oxygen-containing fuels

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Performance characterization of rigid polyurethane foam with refined alkali lignin and modified alkali lignin

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Journal of Forestry Research 2009年第2期20卷 161-164页

作者： LIU Zhi-ming, YU Fei, FANG Gui-zhen, YANG Hui-jun key laboratory of bio-based material science and technology, Ministry of Education, Northeast Forestry University, Harbin 150040, P.R.China Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin 150040 P.R. China

The two kinds of rigid polyurethane(PU) foams were prepared with respectively adding the refined alkali lignin and alkali lignin modified by 3-chloro-1,2-epoxypropane to be instead of 15% of the polyether glycol in *** indexes of mechanical performance, apparent density, thermal stability and aging resistance were separately tested for the prepared PU *** results show that the mechanical property, thermal insulation and thermal stability for PU foam with modified alkali lignin are excellent among two kinds of PU foams and control *** additions of the refined alkali lignin and modified alkali lignin to PU foam have little effect on the natural aging or heat aging resistance except for decreasing hot alkali resistance ***, the thermal conductivity of modified alkali lignin PU foam is lowest among two kinds of PU foams and control *** alkali lignin PU foam modified by 3-chloro-1,2-epoxypropane could be applied in the heat preservation field.

关键词： refined alkali lignin modified alkali lignin rigid PU foam mechanic performance thermal stability

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Wood nondestructive test based on artificial neural network

Wood nondestructive test based on artificial neural network

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2009 International Conference on Computational Intelligence and Software Engineering, CiSE 2009

作者： Zhu, Xiao-Dong Cao, Jun Wang, Feng-Hu Sun, Jian-Ping Liu, Yu Key Laboratory of Bio-Based Material Science and Technology Ministry of Education Northeast Forestry University Harbin China

ISBN: (纸本)9781424445073

It is important to detect defects in wood, when it reduce the performance. The data and signal processing technology providing researchers with more damage identification problem solution ideas and methods. This article explore the wavelet analysis and artificial neural network for the wood defects based on non-destructive testing, and build an artificial neural network model for wood non-destructive testing technology. After wavelet packet decomposition to extract the different frequency bands of energy levels characteristic of the signal, as the neural network input samples, the network training and learning. Training of the BP network model can be achieved on the different locations automatic recognition of defects, defects of the middle of more than 90% recognition rate on the left and right side of the recognition rate of over 80%. ©2009 IEEE.

关键词： Wavelet analysis

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Evaluation of Wood-based materials' Effect on Physiological, Psychological and Environment Pollution with AHP

Evaluation of Wood-based Materials' Effect on Physiological,...

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The 3rd International Conference on bioinformatics and biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)

作者： Wenshuai Chen Haipeng Yu Key Lab of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University HarbinChina

Employing analytic hierarchy process (AHP) method, aim to evaluate the effects of wood-based materials on human psychology, physiology, and environment pollution, this article firstly constructed the hierarchical model and endowed the evaluation indexes with corresponding weight value. Further more, it scored 20 kinds of wood-based materials and 7 kinds of contrast materials, and then could rank them by their comprehensive scores. The results showed that solid woods have excellent effects on human physiological comfort and psychological satisfaction, while poor contribution to environment pollution. The score of each kind of material has certain positive correlations in the criteria-vector combinatorial space. based on the differences of comprehensive score, materials can be classified by quality and applicable field into 5 categories.

关键词： Wood-based materials Physiological comfort Psychological satisfaction Environmental pollution AHP

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Comparison of Image Analysis and Conventional Methods for Cellular Tissue Proportion Measurement of Wood

Comparison of Image Analysis and Conventional Methods for Ce...

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2009 IEEE International Conference on Information and Automation(2009年 IEEE信息与自动化国际学术会议)

作者： Haipeng Yu Yixing Liu Guangping Han Yongzhi Cui key Lab of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbin 150040China

Wood cellular tissue proportion was measured using computer image processing technique. Digital transverse microstructure images were photographed through the system composed of microscope and video camera. The obtained images were then analyzed with an image analysis software through the steps of threshold, binary transform, grains filter, grains expanding and erosion, lacunae calking, and morphological features calculation. As a result, we could figure out the vessel proportion, fiber proportion and xylem ray proportion of broad-leaved tree, as well as the resin canal proportion, tracheid proportion and ray proportion of coniferous tree. Twenty-five species of coniferous and broad-leaved trees were tested using both image analysis and conventional methods. The results showed that significant positive correlations exist among the tested species. The approach of computer image analysis had more advantages of rapidity, accuracy and agility than the conventional methods.

关键词： Image analysis Microstructure Image processing Testing Wood industry Microscopy Resins Irrigation biological materials Automation

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Arsenic speciation in sediments of Poyang Lake and its main branches

Arsenic speciation in sediments of Poyang Lake and its main ...

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3rd International Conference on bioinformatics and biomedical Engineering, iCBBE 2009

作者： Shujuan, Liu Mingbiao, Luo Faliang, Li Maolan, Wang Faculty of Chemistry Biology and Material Science East China Institute of Technology Fuzhou China Key Lab. of Poyang Lake Ecology and Bio-resource Utilization Ministry of Education Nanchang China

ISBN: (纸本)9781424429028

In this paper, arsenic speciations in sediments of Poyang Lake and its main branches were investigated in much details. Sediment samples were collected in different sites of Poyang Lake and its branches. Arsenic is quantified with micro-hydride generation- atomic fluorescence spectrometry. Five chemical combination speciations of arsenic in the sediments are differentiated by the commonly accepted five-step sequential extraction method. The results demonstrated that the total amount of arsenic in all sediments is in accordance with the background value of Poyang Lake district. Total arsenic, trivalent and pentavalent arsenic in the samples are mainly bounded to organic matter or existed as residual forms as well. Three reactive speciations including exchangeable species, carbonate bounded and Fe-Mn bounded forms account for about 20% of the total five fractions. The content of reactive speciations are varied with pH value, oxiding-reducing conditions and organic matter in the sediments, et al. Results also indicated that arsenic levels were much higher in certain branch sediments than that in Poyang lake, which can be explained by the stream pollution resulted from the drainage of minerals mining waste upriver or the sanitary sewage drainage. ©2009 IEEE.

关键词： Sediments

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Wood Nondestructive Test based on Artificial Neural Network

Wood Nondestructive Test Based on Artificial Neural Network

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International Conference on Computational Intelligence and Software Engineering (CiSE)

作者： Xiao-dong Zhu Jun Cao Feng-Hu Wang Jian-ping Sun Yu Liu Key laboratory of Bio Based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin China

关键词： Nondestructive testing Artificial neural networks Neural networks Signal processing Wavelet analysis materials testing Frequency Wavelet packets Signal sampling Analytical models

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Fire-retardant and smoke-suppressant performance of an intumescent waterborne amino-resin fire-retardant coating for wood

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中国高等学校学术文摘·林学 2008年第4期3卷 487-492页

作者： Fengqiang WANG Zhijun ZHANG Qingwen WANG Jiayin TANG Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin 150040 China

An intumescent waterborne amino-resin fire-retardant coating for wood (C) was synthesized and its fire-retardant and smoke-suppressant properties were investigated. The main film-builder of C was urea-form-aldehyde resin blended with polyvinyl acetate resin. The intumescent fire-retardant system of C consisted of guany-lurea phosphate (GUP), ammonium polyphosphate (APP), pentaerythritol (PER) and melamine (MEL). Specimens of plywood painted, respectively, with a commercial intumes-cent fire-retardant coating (A), a synthesized coating (C), and the main film-builder of coating C (B), as well as an unpainted plywood (S-JHB), were analyzed by cone calori-metry (CONE). The results show a marked decrease in the heat release rate (HRR) and the total heat release (THR), an increased mass of residual char (Mass), a marked post-ponement in time to ignition (TTI) and a reduced carbon monoxide production rate (P<,CO>). The smoke production rate (SPR) and total smoke production (TSP) of the ply-wood painted with coating C were observed with the CONE test. The overall fire-retardant and smoke-suppres-sant performance of the synthesized coating C was much better than that of the commercial coating A. The thermo-gravimetric analysis (TGA) results of coating C and its film-builder B indicated that the thermal degradation process of B was slowed down by the addition of the intumescent fire-retardant system; the increase in the amount of charring of coating C was considerable.

关键词： waterborne wood coatings intumescent fire-retardant coatings amino-resin cone calorimeter thermo-gravimetric analysis smoke suppression

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Effects of degreasing treatment on the content of benzene-ethanol extractive from veneer of schotch pine

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Cailiao Kexue yu Gongyi/material science and technology 2008年第6期16卷 852-854页

作者： Guo, Ming-Hui Key Laboratory of Bio-Based Material Science and Technology Northeast Forestry University Harbin 150040 China

By concucting an orthogonal test, effects of NaOH concentration, decreasing temperature and de-greasing time on the content of benzene-ethanol extractive of the veneer of Scotch pine were evaluated. The results show that the NaOH concentration, degreasing time and temperature are in inverse proportion to the content of extractive. Analysis of the orthogonal test shows that effects of the NaOH concentration and degreasing time are significant, while the effect of degreasing temperature is trivial.

关键词： Benzene

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