发布求助
文献互助 智能选刊 最新文献

WOOD RESEARCH 67(1) 2021最新文献

筛选
英文 中文
EFFECT OF OPEN-HOLES ON MECHANICAL PROPERTIES OF WOOD COMPOSITE MATERIALS 开孔对木质复合材料力学性能的影响
WOOD RESEARCH 67(1) 2021 Pub Date : 2022-01-16 DOI: 10.37763/wr.1336-4561/67.1.4150
Simona Gauronskaitė, V. Dobilaitė, M. Jucienė, D. Albrektas
{"title":"EFFECT OF OPEN-HOLES ON MECHANICAL PROPERTIES OF WOOD COMPOSITE MATERIALS","authors":"Simona Gauronskaitė, V. Dobilaitė, M. Jucienė, D. Albrektas","doi":"10.37763/wr.1336-4561/67.1.4150","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/67.1.4150","url":null,"abstract":"A few variations of open-holes in wood-based pieces, particle board and plywood were modeled in this article. The modulus of elasticity and the coefficient of damping for these pieces were determined using static and dynamic methods and the effect of holes of different quantity and size on mechanical properties were evaluated. As regards to wood particle boards, it was found that the modulus of elasticity decreased to10% after drilling holes, and the coefficient of damping increased to 13%. With regard to plywood pieces these changes were up to 14.5% and up to 21.5%, respectively.","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"146 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73985765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
WOOD CHEMICAL COMPONENTS AND DECAY RESISTANCE OF FOUR COMMON MONGOLIAN SOFTWOODS 四种常见蒙古软木的木材化学成分及耐腐性
WOOD RESEARCH 67(1) 2021 Pub Date : 2022-01-16 DOI: 10.37763/wr.1336-4561/67.1.7685
Murzabyek Sarkhad, F. Ishiguri, I. Nezu, Bayasaa Tumenjargal, Bayartsetseg Baasan, Ganbaatar Chultem, J. Ohshima, N. Habu, S. Yokota
{"title":"WOOD CHEMICAL COMPONENTS AND DECAY RESISTANCE OF FOUR COMMON MONGOLIAN SOFTWOODS","authors":"Murzabyek Sarkhad, F. Ishiguri, I. Nezu, Bayasaa Tumenjargal, Bayartsetseg Baasan, Ganbaatar Chultem, J. Ohshima, N. Habu, S. Yokota","doi":"10.37763/wr.1336-4561/67.1.7685","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/67.1.7685","url":null,"abstract":"To utilize wood resources in Mongolia, amounts of wood chemical components (hot-water extracts, 1% NaOH extracts, ethanol-toluene extracts, holocellulose, -, -, and -cellulose, Klason lignin, and ash) were determined in four common Mongolian softwoods, Pinus sylvestris, Pinus sibirica, Picea obovata, and Larix sibirica. In addition, decay resistance of heartwood was evaluated against a white-rot fungusTrametes versicolor, and a brown-rot fungusFormitopsis palustris. Among the four species, heartwood of Larix sibiricawas chemically characterized by higher amounts of hot-water and 1% NaOH extracts, and lower amounts of holocellulose and Klason lignin. These characteristics may be related to thepresence of arabinogalactan which is easily extracted with cold water. Mean mass loss in each softwood ranged from 6.9% to 28.1% in white-rot fungus, and from 24.8% to 48.3% in brown-rot fungus. Among four species, Pinus sibiricashowed the highest decay resistance against both fungi. By the linear mixed-effects model analysis, negative relationships were found between mass loss and amounts of extracts in heartwood, suggesting that heartwood having larger amounts of extracts showed higher natural decay durability.","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90931843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
ANALYTICAL STUDY ON AXIAL AND ECCENTRIC COMPRESSIVE BEHAVIOR OF POPLAR COLUMN STRENGTHENED BY BFRP 杨树BFRP加固柱轴向和偏心受压特性分析研究
WOOD RESEARCH 67(1) 2021 Pub Date : 2022-01-16 DOI: 10.37763/wr.1336-4561/67.1.1125
Fengxia Han, Qing Liu, Xingwen Guo, Meng Zhang, Xia Han
{"title":"ANALYTICAL STUDY ON AXIAL AND ECCENTRIC COMPRESSIVE BEHAVIOR OF POPLAR COLUMN STRENGTHENED BY BFRP","authors":"Fengxia Han, Qing Liu, Xingwen Guo, Meng Zhang, Xia Han","doi":"10.37763/wr.1336-4561/67.1.1125","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/67.1.1125","url":null,"abstract":"In this work, the compression behaviour of the Xinjiang poplar column was reinforced by basalt fibre reinforced polymer (BFRP) strips with different reinforced configurations, and thenumerical simulations were performed on the axial and eccentric compressions of poplar columns unreinforced and reinforced with BFRP to assess the effect of the bearing capacity and deformation of the columns. The results show that the use of BFRP to reinforce the Xinjiang poplar column effectively improves its axial compressive bearing capacity (axial compression) andbending bearing capacity (eccentric compression), and at the same time, the bearing capacity and stiffness of the columns strengthened by BFRP increased with the bonding area of BFRP.","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80931358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
EFFECTS OF LIQUID NITROGEN IN HARDLY IMPREGNABLE FIR WOOD 液氮对难固结杉木的影响
WOOD RESEARCH 67(1) 2021 Pub Date : 2022-01-16 DOI: 10.37763/wr.1336-4561/67.1.123133
Şeref Kurt
{"title":"EFFECTS OF LIQUID NITROGEN IN HARDLY IMPREGNABLE FIR WOOD","authors":"Şeref Kurt","doi":"10.37763/wr.1336-4561/67.1.123133","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/67.1.123133","url":null,"abstract":"The main purpose of this study was to develop new methods to eliminate the problems encountered during the impregnation of wood material, and in this context, to improve theretention of wood materialby using liquefied nitrogen. Uludağ Fir (Abies nordmannianasubsp. Bornmulleriana) was used as wood material impregnated with Tanalith-E, Immersol aqua and borax. The effects of liquid nitrogen and the amount of retention on the mechanical properties were investigated. Application of liquid nitrogen before impregnation has increased theretention in fir wood by an average of 150-200% in all impregnation methods, compared to the groups without liquid nitrogen application. Despite this increase in retention amounts, no significant changes were observed in mechanical properties due to the application of liquid nitrogen.","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91375510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
RESEARCH ON WOOD DEFECTS CLASSIFICATION BASED ON DEEP LEARNING 基于深度学习的木材缺陷分类研究
WOOD RESEARCH 67(1) 2021 Pub Date : 2022-01-16 DOI: 10.37763/wr.1336-4561/67.1.147156
Jiaxin Ling, Yonghua Xie
{"title":"RESEARCH ON WOOD DEFECTS CLASSIFICATION BASED ON DEEP LEARNING","authors":"Jiaxin Ling, Yonghua Xie","doi":"10.37763/wr.1336-4561/67.1.147156","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/67.1.147156","url":null,"abstract":"Whereas the traditional manual detection method of wood defects is problematic due time-consuming, low efficiency and low accuracy, an derived model based on ResNet-v2 was constructed. The new derived model can accurately point out the types of defects such as wormhole, live joint and dead joint on the surface of plate, improve the accuracy ofclassification, and greatly reduce the labor force. Compared with the traditional convolutional neural network, ResNet-v2 derived model has better recognition effect and stronger generalization ability. The experimental results show that the classification accuracy of ResNet-v2 derived network model based on different number of layers is more than 80%, and the classification accuracy of ResNet-v2 derived model can reach 97.27%.","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74451763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
RESEARCH ON BAMBOO DEFECT SEGMENTATION AND CLASSIFICATION BASED ON IMPROVED U-NET NETWORK 基于改进u-net网络的竹材缺陷分割与分类研究
WOOD RESEARCH 67(1) 2021 Pub Date : 2022-01-16 DOI: 10.37763/wr.1336-4561/67.1.109122
Junfeng Hu, Xi Yu, Yafeng Zhao, Kaiyao Wang, Wenlin Lu
{"title":"RESEARCH ON BAMBOO DEFECT SEGMENTATION AND CLASSIFICATION BASED ON IMPROVED U-NET NETWORK","authors":"Junfeng Hu, Xi Yu, Yafeng Zhao, Kaiyao Wang, Wenlin Lu","doi":"10.37763/wr.1336-4561/67.1.109122","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/67.1.109122","url":null,"abstract":"In this paper, computer vision technology is used to quickly and accurately identify and classify the surface defects of processed bamboo, which overcomes the low efficiencyof manual identification. The datasets consist of 6360 defective bamboo mat images of fourcategories taken by the author at the same position, which are split at a ratio of 8:2 for training and testing. In this experiment, we improved the U-net to segment the datasets and use VGG16, GoogLeNet and ResNet50 with attention mechanism for classification and comparison.The experimental results show that the accuracy of this method is 5.65% higher thanthe commonly used neural network method. The highest accuracy rate is 99.2%.","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"178 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80015013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
REDUCTION OF EFFECT OF GROWTH STRESS PRESENCE USING ENDLESS SCREW DURING KILN DRYING AND STEAMING AND HEATING TREATMENT IN LOG BEFORE SAWING 利用无止回螺杆降低原木在窑干和锯切前蒸、加热过程中生长应力存在的影响
WOOD RESEARCH 67(1) 2021 Pub Date : 2022-01-16 DOI: 10.37763/wr.1336-4561/67.1.157169
R. Moya, C. Tenorio
{"title":"REDUCTION OF EFFECT OF GROWTH STRESS PRESENCE USING ENDLESS SCREW DURING KILN DRYING AND STEAMING AND HEATING TREATMENT IN LOG BEFORE SAWING","authors":"R. Moya, C. Tenorio","doi":"10.37763/wr.1336-4561/67.1.157169","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/67.1.157169","url":null,"abstract":"The relaxation of growth stress in trees growing in fast-growth conditions, as plantation in tropical areas, affects lumber quality during of sawing or drying process. It was evaluated two pretreatments (heating and steaming application) before sawing process and endless screw use to maintain the boards pressed during drying ofDipteryx panamensisand Hieronyma alchorneoideswood with objective to reduce the effects of relaxation of growth stress. Theresults showed endless screw is used to maintain the boards pressed, the moisture content (MC) or drying rate did not vary. The use of endless screws with daily adjustment during drying produced a reduction of cup, check and split defects in lumber and this treatment is accompanied with a pre-treatment before sawing (heating or steaming treatment) decreased theincidence of drying defects. Then the use of both treatments is an opportunity to reduce theeffects of relaxation of growth stress on the quality of the wood of D. panamensisand H.alchorneoidesfrom fast-growth plantation conditions.","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82668210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
PHYSICAL AND MECHANICAL CHARACTERIZATION OF STRUCTURAL WOOD USED IN PAKISTAN 巴基斯坦使用的结构木材的物理和机械特性
WOOD RESEARCH 67(1) 2021 Pub Date : 2022-01-16 DOI: 10.37763/wr.1336-4561/67.1.134146
Khawaja Adeel Tariq, M. Haroon, Abdullah Habib Mughal, Sher Ali
{"title":"PHYSICAL AND MECHANICAL CHARACTERIZATION OF STRUCTURAL WOOD USED IN PAKISTAN","authors":"Khawaja Adeel Tariq, M. Haroon, Abdullah Habib Mughal, Sher Ali","doi":"10.37763/wr.1336-4561/67.1.134146","DOIUrl":"https://doi.org/10.37763/wr.1336-4561/67.1.134146","url":null,"abstract":"Six species of wood (Vachellia nilotica,Eucalyptus camaldulensis, Ziziphus mauritiana, Albizia lebbeck, Melia azedarach, Dalbergia sissoo)weretested in compression and tension parallel to the grain. The specimens were collected from different areas of Pakistan. Thecompressive strengths,tension parallel to grain and hardness of the woodwere determined by testing rectangular shape wooden specimens(ASTM D143 2014, Janka 1906). Itwas observed that compressive and tensile strength of Vachllia niloticaparallel to the grain is higher thanother species whereas, Eucalyptus camaldulensishardness behaviour along radial and tangential surface is higher among the wooden samples tested.","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88598430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Qualification de la contravention de grande voirie en infraction continue : point de départ de la prescription de l'action publique 将高速公路违章定性为连续违章:公共诉讼时效的起点
WOOD RESEARCH 67(1) 2021 Pub Date : 2021-01-07 DOI: 10.35562/alyoda.6639
Johanna Boulieu
{"title":"Qualification de la contravention de grande voirie en infraction continue : point de départ de la prescription de l'action publique","authors":"Johanna Boulieu","doi":"10.35562/alyoda.6639","DOIUrl":"https://doi.org/10.35562/alyoda.6639","url":null,"abstract":"","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90907994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Social Factors of Amphetamines Use from the Perspective of Users: The Qualitative Arm of the ATTUNE Research Study in the Czech Republic 从使用者角度看安非他命使用的社会因素:捷克共和国ATTUNE研究的定性部分
WOOD RESEARCH 67(1) 2021 Pub Date : 2021-01-01 DOI: 10.35198/01-2021-001-0002
{"title":"Social Factors of Amphetamines Use from the Perspective of Users: The Qualitative Arm of the ATTUNE Research Study in the Czech Republic","authors":"","doi":"10.35198/01-2021-001-0002","DOIUrl":"https://doi.org/10.35198/01-2021-001-0002","url":null,"abstract":"1 | Charles University, First Faculty of Medicine and General University Hospital in Prague, Department of Addictology, Prague, Czech Republic 2 | J. E. Purkyně University, Faculty of Social and Economic Studies, Department of Social Work, Ústí nad Labem, Czech Republic Citation | Petruželka, B., Barták, B., & Laštovková, J. (2021). Social factors of amphetamines use from the perspective of users: The qualitative arm of the ATTUNE research study in the Czech Republic. Adiktologie, 21 (1), 25–33. https://doi.org/10.35198/01-2021-001-0002 Social Factors of Amphetamines Use from the Perspective of Users: The Qualitative Arm of the ATTUNE Research Study in the Czech Republic","PeriodicalId":23841,"journal":{"name":"WOOD RESEARCH 67(1) 2021","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84911630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信