最新刊期
      期 6 ， 2019

        Research & Development

      • XUE Shuo,ZHANG Zhan-yi,ZHOU Hai-bin
        Vol. 33, Issue 6, Pages: 1-5(2019) DOI: 10.19455/j.mcgy.20190601
        摘要：A load bearing test on parallel chord wooden trusses with two web member systems under 1.9 kPa of uniform live load were conducted to evaluate the stresses and deformation of the light wooden truss joists.The results showed that under the same load,the deformations of the midspan and the ends of the two trusses were almost the same.The deflection of the trusses at midspan calculated by finite element simulation was 4.37 mm and 4.17 mm,respectively,which were consistent with the experimental results.The finite element simulation method proved to accurately predict stresses and deformation of parallel chord wooden trusses.This method could be applied in safety design for wooden truss joist.  
        关键词：parallel-chord wooden trusses;deflection;load-carrying properties;finite element simulation   
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      • CHEN Hong-jun,ZHANG Lei,HU Yan-jun,SHI Peng-tu
        Vol. 33, Issue 6, Pages: 6-9(2019) DOI: 10.19455/j.mcgy.20190602
        摘要：The volatile organic compounds（VOCs） from furniture composed of different materials were detected with Gas Chromatography-Mass Spectrometer in simulation indoor environment.The results showed that the release concentration of the VOCs decreased with time extension.In the same volume environment,the higher the load rate of furniture,the higher the TVOC release concentration.  
        关键词：furniture;environmental chamber;volatile organic compounds（VOCs）;Gas Chromatography-Mass Spectrometer（GC-MS）   
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      • HU Meng-jie,YU Jun-bao,ZHANG Su-jun
        Vol. 33, Issue 6, Pages: 10-13(2019) DOI: 10.19455/j.mcgy.20190603
        摘要：The bamboo scrimber samples were combusted with three and four sides exposed to fire respectively.After cooling down completely,the compressive strength parallel to the grain of the samples were tested.The results showed that as combustion time increased,the carbonation layer depth and the mass loss rate increased,while the compressive strength parallel to the grain decreased gradually.The bearing capacity of the samples combusted on four sides was lower than that on three sides.The samples maintained the compressive strength of 44 MPa in 45 minutes of combustion time.  
        关键词：bamboo scrimber;combustion;carbonation layer depth;mass loss rate;bearing capacity;compressive strength parallel to the grain   
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      • YAN Ting-ting,CHEN Yuan,WANG Qian,SHANG Li-li,LI Gai-yun
        Vol. 33, Issue 6, Pages: 14-18(2019) DOI: 10.19455/j.mcgy.20190604
        摘要：Ethanol extractive contents correlate with agarwood quality.To identify characteristics of domestic agarwood for grading,LC-MS combining with chemometrics were used to profile and compare the compositions in ethanol extracts in this study.The main chemicals detected by LC-MS in the agarwood samples were identified as 2-（2-phenylethyl） chromone derivatives with different structures which could be classified in four grades.The results of PLS-DA（Partial least squares-discrimination analysis） based on 8～17 minutes of TIC（total ion chromatograph） showed that the agarwood sample loadings corresponded to relevant grades and that three potential chemicals related with agarwood quality were identified by characteristic fragment ion peaks.It was expected that the results could provide scientific reference for agarwood grading.  
        关键词：domestic agarwood;grading;LC-MS;chemometrics   
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      • LI Wei-guang,ZHANG Zhan-kuan
        Vol. 33, Issue 6, Pages: 19-23(2019) DOI: 10.19455/j.mcgy.20190605
        摘要：In this paper,influence of radial clearance angle of the sawtooth side edge in closed cutting and open cutting on the tangential force and normal force in different sawing conditions were evaluated.It was found that the tangential force which accounted for 4.6% to 20.2% of the total tangential force was the main force from the side edge while the normal force had no obvious changes.When the radial clearance angle increased or the cutting thickness decreased,the side edge cutting force decreased.The tangential force increased with increased cutting speed which had no obvious influence on the normal force.With the same radial clearance angles,the tangential force from the side edge in transverse cutting showed the biggest.  
        关键词：wood sawing;sawtooth;side edge;radial clearance angle;tangential force;normal force   
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        Discussion & Suggestion

      • JIAO Li-chao,HE Tuo,YIN Jiang-ping,LU Yang,YUAN Liang-chen,YIN Ya-fang
        Vol. 33, Issue 6, Pages: 24-28(2019) DOI: 10.19455/j.mcgy.20190606
        摘要：The 18th Conference of the Parties（CoP） of the Convention on International Trade in Endangered Species of Wild Fauna and Flora（CITES） was held in Geneva,Switzerland,in August 2019.At the conference,19 timber species from three genera,including Widdringtonia whytei,Pterocarpus tinctorius and Cedrela spp.（Neotropical tree species）,were added to the appendix Ⅱ;the annotations of Dalbergia spp.and three Guibourtia species,which were already listed in appendix Ⅱ,were also amended.The authors analyzed the relevant proposals of timber species at this conference,discussed the changes and trends of the CITES-listed timber species in recent 10 years and gave specific suggestions on implementation strategy of CITES-listed timber species in China.  
        关键词：CITES;appendix amendment;endangered timber species;international trade   
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      • WU Yan-mei,TANG Zhao-qun,WANG Rui
        Vol. 33, Issue 6, Pages: 29-32(2019) DOI: 10.19455/j.mcgy.20190607
        摘要：Factors affecting indoor formaldehyde concentrations were analyzed and the methods of controlling the concentration among relevant standards in Japan,Europe and China were compared.Special consideration based on loading rate was given to predicting the concentrations in house interior decoration with prefabricated wood-based components.It was hoped the research progress could provide a reference to improvement of controlling indoor formaldehyde concentrations in China.  
        关键词：house interior decoration with prefabricated wood-based components;formaldehyde concentration;indoor air;loading rate;control method   
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      • LIU Hui,XIONG Xian-qing,YU Ke,FEI Jian-liang
        Vol. 33, Issue 6, Pages: 33-37(2019) DOI: 10.19455/j.mcgy.20190608
        摘要：To solve manual sorting problems,a key technical framework including information collection technology,intelligent machinery,MES and WMS etc.was developed for customized panel furniture manufacturing,based on smart sorting concept and theory.The functions of bar code recognition technology,radio frequency identification technology,three-dimensional library shelves,sorting robots,conveyor equipment were introduced in detail.The application of the smart sorting system is recommended for improving production efficiency as well as lowering cost and error rates in customized panel furniture manufacturing.  
        关键词：customized panel furniture;smart sorting system;key technology   
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      • TIAN Zheng-yu,ZHOU Guang-zhi,XU Sheng-yang,LU Bu-yun
        Vol. 33, Issue 6, Pages: 38-41(2019) DOI: 10.19455/j.mcgy.20190609
        摘要：The authors presented cost breakdown of wood construction projects and analyzed cost control measures in project investment estimate,design and implementation stages.Suggestions were given to wood construction companies in China for reference.  
        关键词：wood construction;expense composition;cost control   
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      • XIAO Da,LIN Ling,WU Ying-jiang,LI Bing,LI Cong,LUO Tian-lu
        Vol. 33, Issue 6, Pages: 42-46(2019) DOI: 10.19455/j.mcgy.20190610
        摘要：Wooden flooring is a kind of commonly-used flooring materials but there is no relevant standard available for slip resistance assessment.Qualitative method,qualitative method combined with semi-quantitative method and semi-quantitative method were respectively used to assess the slip risk degree of the wooden flooring.Based on comprehensive analyses,it was concluded that the wooden flooring was a low slip risk material.  
        关键词：wooden flooring;slip risk;assessment;qualitative method;semi-quantitative method   
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      • FU Zong-ying,ZHOU Fan,GAO Xin,ZHOU Yong-dong
        Vol. 33, Issue 6, Pages: 47-50(2019) DOI: 10.19455/j.mcgy.20190611
        摘要：Imported radiata pine wood samples were heat-treated at four temperatures ranging from185℃ to 230℃ for 4 hours.At 215℃,the wood samples were treated for three,four and five hours,respectively.The bending properties and dimensional stability of the samples were tested.Results showed that the modulus of elasticity（MOE） of the samples fluctuated with the increase of treating temperature.The MOE reached the maximum value when treating temperature was 200℃.Meanwhile the modulus of rupture（MOR） of the samples kept falling as the treating temperature increased.The MOE and MOR were all slightly decreased when the treating time extended.The heat treatment improved the dimensional stability of the samples significantly.The equilibrium moisture content,moisture excluding efficiency and anti-swelling efficiency of the samples were more affected by the treating temperatures than the durations.  
        关键词：imported Radiata pine wood;heat treatment;bending properties;dimensional stability   
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      • ZHANG Bin,MA Xing-xia,ZHANG Jing-peng,LI Xiao-wen,JIANG Ming-liang,ZHOU Yong-dong
        Vol. 33, Issue 6, Pages: 51-53(2019) DOI: 10.19455/j.mcgy.20190612
        摘要：The natural durability of Radiata pine（Pinus radiata） wood as well as the decay resistance of heat-treated and water-based copper azole-treated Radiata pine wood were evaluated.The test results showed that natural durability of Radiata pine wood reached Grade Ⅲ（slight decay resistance）.The decay resistance of Radiata pine wood samples heat-treated at 215℃ for 3 hours was improved significantly to Grade I.The permeability of the Radiata pine wood was also assessed with the results showing a better permeability of the sapwood samples than the heartwood ones.To reach chemical retention value of 1.17 kg/m3,the sapwood could be easily treated in vacuum condition just for a short period of time,while the heartwood had to be treated in vacuum conditions and then soaked under normal pressure.When the sapwood samples were treated with CuAz-5 preservatives with 0.97 kg/m3 of the chemical retention value,the loss rate in laboratory test was less than 5.7%.When chemical retention value of 1.4 kg/m3,the sapwood samples performed equally well at both Year-1 and Year-8 field tests.  
          
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      • CHEN Yuan,GAN Jia-bing,LI Shan,FU Zong-ying,LI Gai-yun,REN Hai-qing
        Vol. 33, Issue 6, Pages: 54-58(2019) DOI: 10.19455/j.mcgy.20190613
        摘要：Two species of native Quercus wood（Q.variabilis and Q.acutissima） were selected for evaluating chemical compositions in the bark,sapwood and heartwood,to aim at providing scientific information for making better cork products and wood-based panels.It was suggested that in making cork products,more attention should be given to the changes of bark phenyl alcohol extract content,ash content,pH value and buffer capacity;while in making panel products,it should be taken into consideration the differences of cellulose,lignin and pH value between the two species and between sapwood and heartwood.  
        关键词：Quercus variabilis;Quercus acutissima;chemical components;bark;sapwood;heartwood;wood-based panel;cork   
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      • JIANG Zheng
        Vol. 33, Issue 6, Pages: 61-62(2019)
        摘要：<正>金陵秋意浓,满城桂花香。2019年10月21-22日,以"凝聚共赢、太尔新程"为主题的"爱克日"活动在南京隆重举行。来自人造板、地板、家具、保温绝热材料、汽车制造、建材等行业的嘉宾近200人出席,其中客户单位超过100家。活动由日本爱克（AICA）集团亚太区、太尔化工中国区主办,旨在籍此答谢长期以来关心和支持太尔、爱克在中国发展的各级政府、行业协会、科研院校和新老客户;展示太尔、爱克20多年在中国全面稳固发展的成果;见证刚刚成功收购太尔南京比邻公司、实现新形势下可持续发展战略;表达太  
          
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