最新刊期
期 0 ， 2020
- 摘要：This paper reviewed the general level of research and production of the structural wood-based panel industry in foreign countries. The primary varieties of structural panels were evaluated including glued-laminated timber, laminated veneer lumber（LVL）,parallel strand lumber, laminated strands lumber, TTS wood I Section, thick plywood and OSB. The areas that were reviewed were: their definition, processing, properties and relevant standards.关键词：Structural wood-based panel;General situation;Trend
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发布时间：2021-02-08 - 摘要：Liquefaction of wood means a thermal chemical process in which wood powder is turned into a sticky liquid with some organic solvent. The advances in wood liquefaction in the past twenty years, involving the methods, mechanism and applications of the products, were reviewed in the （paper. ）关键词：Wood liquefaction;Liguefaction mechanism;Comprehensive utilization of wood
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发布时间：2021-02-08 - 摘要：Based on an overall analysis of the worldwide research on wood permeability, this paper summarized the primary theories and techniques for studying wood permeability. The achievements in this area of study made by the Chinese researchers were also reviewed.关键词：wood;Fluid;Wood permeability
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发布时间：2021-02-08 - 摘要：Three wood species, Manchurian Ash（Fraxinus mandshurica）, Manchurian Walnut（Juglans mandshurica） and Spruce （Picea jezoensis var. komarovii）,and two kinds of adhesives, （water）based polymer-isocyanate and water-solidified polyurethane, were selected to make laminated flitches. The water resistance of the flitches, along with the thickness warp and surface roughness of the sliced laminated veneer cut from the fliches, were tested. After hydrothermal treatment, （only）part of the Ash Laminated flitches made with water based polymer-isocyanate were found to have peeled, whereas the other two species of laminates made either with water-solidified polyurethane or water based polymer-isocyanate, showed good bond property and water resistance. The surface roughness of the three species of laminated veneer at 0.60 mm thick could meet the （corresponding）requirements in National Standard GB/T 13010-1991.关键词：Laminated flitch;Edge jointed veneer（slice）;surface roughness
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发布时间：2021-02-08 - 摘要：An air-drying experiment was conducted on four tropical plantation grown Eucalyptus species （Eucalyptus citriodora, E. grandis, E. urophylla×grandis and E. exserta） for one year to determine their respective air-drying characteristics and rules during the four seasons. The drying rates and the drying defects of the lumber, with respect to different moisture stages and different seasons, were analyzed in this （paper.）These results will provide references for manufacturers on how to make efficient utilization of air drying and kiln drying.关键词：Eucalyptus plantation;Air drying;Moisture content（MC）;Equilibrium moisture content（EMC）
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发布时间：2021-02-08 - 摘要：Multi-serial ports are widely used in microcontrolled application systems. A highly （efficient）multi-serial port extension method based on ST16C554 and CPLD was presented in this （paper.） Its implementation is able to make four serial ports share one limited interrupt resource and thus reduce the system cost. ST16C554 works in FIFO mode, receives and transmits data by （interrupt）mode with a 16 byte hardware transmit buffer, that will also greatly cut down the load on the CPU.关键词：Multi-serial port;Complex programmable logic devices（CPLD）;C51 Microcontroller;16C554;Verilog hardware description language（VHDL）
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发布时间：2021-02-08 - 摘要：For measuring modulus of rupture（MOR）and modulus of elasticity（MOE）of structural plywood, the three methods were established on a single loading point with the span of 220 mm and 340 mm, and double points with 357 mm span. The test results indicated that there was an obvious linear relativity among the MOR values, while the MOE values were different from each other distinctly. The authors concluded that these methods could be comparable to each other for measuring MOR of plywood, but incomparable for measuring MOE.关键词：structural plywood;mechanical property;test method
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发布时间：2021-02-08 - 摘要：The principles of wavelet transmission and the application of artificial neural network in non-destruction testing（NDT）were reviewed and presented in this paper. Two types of wavelet and artificial neural network methods of NDT for wood materials were studied: laxation and densification. The advantages of wavelet transmission in getting eigenvalue and the merits of artificial neural network in realizing pattern recognition were described.关键词：Wavelet transform;Artificial neural network;Non-destructive test （NDT）;wood materials
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发布时间：2021-02-08 - 摘要：Using small-diameter Daimyo Oak （Quercus dentata） Lumber, the effect of the position in a top-fan kiln on its drying defects was investigated in this paper. The results showed that the differences of the drying defects between the front and back positions were slight, whereas that between the upper and lower positions were significant. The lumber at the upper position in the kiln tended to take more severe bow and crook. Further correlation analysis of the results （revealed）that, the bow and crook of lumber was closely related to positions in the upper-lower （direction）at the level of α=0.05. These results indicated that an improper position could result in more drying defects and even degradation of the lumber.关键词：Small diameter Daimyo Oak;Position;Drying defects
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发布时间：2021-02-08 - 摘要：This paper introduced a design and contruction case for a base pit support system for a MDF factory in Hainan Province. Since the base pit was just nearby an old brick building, the shoring system was important to safeguard both the pit and the old building. The problems the （author）encountered during the design and construction were analyzed in this paper. Practices showed that the final design developed was successful and economical and provided practical （experiences）for similar projects.关键词：Dynamic design;Hot-press base pit;Support system;Steel-pipe pile
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发布时间：2021-02-08 - 摘要：INO（Intellgent & Oeclogy）rice/wheat straw boards, originally developed by the Stropoly factory in Germany, are described in this paper as an environmentally friendly product. The manufacturing techniques and equipment were described and the development trends or INO boards in both Europe and China were also discussed. Finally, some suggetions on developing rice/wheat straw boards in China were suggested.关键词：INO rice/straw board;Manufacturing technology;Performance of equipment
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发布时间：2021-02-08
- Address：Box 29，Research Institute of Wood Industry, No. 1, Dongxiaofu, Haidian District, Beijing Postal code：100091
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