您现在的位置: 首页> 研究主题> 花旗松

花旗松

花旗松的相关文献在1982年到2022年内共计126篇,主要集中在林业、工业经济、贸易经济 等领域,其中期刊论文90篇、会议论文1篇、专利文献21057篇;相关期刊58种,包括中国经济信息、市场观察、国际木业等; 相关会议1种,包括第十二届全国木材干燥学术研讨会等;花旗松的相关文献由257位作者贡献,包括周福军、应国清、张存旭等。

花旗松—发文量

期刊论文>

论文:90 占比:0.43%

会议论文>

论文:1 占比:0.00%

专利文献>

论文:21057 占比:99.57%

总计:21148篇

花旗松—发文趋势图

花旗松

-研究学者

  • 周福军
  • 应国清
  • 张存旭
  • 易喻
  • 梅建凤
  • 樊军锋
  • 陈才军
  • 陈翔
  • 华洁
  • 周永学
  • 期刊论文
  • 会议论文
  • 专利文献

搜索

排序:

年份

    • 摘要: 在不含任何化学添加剂的条件下用高温对木材进行同质炭化处理,使木材表面呈现丰富的木纹效果,并具有防腐作用的产品,称为炭化木。常用的木材有花旗松、赤松、杉木、樟子松等。
    • 无1
    • 摘要: 1 .一般哪些树种的木材常用于建造房屋?一般来说,软木(通常指针叶材)较适合用于制作建筑框架结构。软木柔韧性好,强度高,加工容易,适宜用来生产笔直长条的锯材。目前北美出产的常用于木结构建筑结构框架的木材主要是铁杉、花旗松、南方松等(见图1 )。
    • 温祝桂; 朱小梅; 刘冲; 赵宝泉; 邢锦城; 丁海荣; 董静; 洪立洲
    • 摘要: 对江西三清山黄杉林区耐性孢子与花旗松Pseudotsuga menziesii形成的菌根进行了研究,通过分析形成的菌根真菌种类、幼苗生物量以及土壤理化性质,研究了菌根数量、侵染率、不同种类对幼苗生长以及土壤微环境对菌根群落结构形成的影响.结果表明:外生菌根真菌的侵染可以有效促进宿主植物的生长,尤其是在两种菌种共存的情况下(地上:y=-0.010x2+0.042x+0.047,R2=0.308,P<0.001;地下:y=-0.007x2+0.032x+0.048,R2=0.225,P<0.001),其中菌种Meliniomyces spp.和Rhizopogon spp.对幼苗生长影响最为明显;菌根的侵染率与幼苗地上部生物量存在正相关性(y=0.054+0.145x,R2=0.404,P<0.001);在孢子群落中占优势地位,与宿主特异性共生,同时有效地促进宿主幼苗生长的菌种Rhizopogon spp.,可能是在黄杉林业重建中具有应用前景的菌根真菌;在所测定土壤因子中,K、OM、Cond以及pH值是影响菌根群落的主要因素.该研究结果为利用菌根技术进行林业重建提供了理论依据.
    • 高鑫; 周凡; 付宗营; 周永东
    • 摘要: The effects of high temperature heat treatment on the equilibrium moisture content and sorption isotherms characteristics of Picea abies and Pseudotsuga menziesii were studied in this paper. In this study water vapor was em-ployed as protective medium and the four heat treatment temperatures were pre-set, which were 160°C, 180°C, 200°C and 220 °C, respectively. The sorption experiments were performed in the two-chamber setup, the relative humidity of air was controlled by eight kinds of salt solutions and the air temperature of sorption experiments were constantly 25°C during the whole isothermal adsorption process. The sorption isotherms of high temperature heat-trea-ted wood were fitted by the Guggenheim-Anderson-deBoer ( GAB) equation. The effects of high temperature heat treatment on the isothermal adsorption curve type, equilibrium moisture content and effective specific surface area were analyzed. The equilibrium moisture content of wood could be significantly reduced by the high temperature heat treatment, and the higher the treatment temperature, the greater the decreasing in the equilibrium moisture content. The equilibrium moisture content of the samples after 220 °C heat treatment were more than 40% lower than that of untreated samples. The GAB equation could be used to describe the isothermal adsorption curve of the high tempera-ture heat treatment of wood, and the fitting accuracy is fairly high (R2>0.98 for all the samples). The isothermal ad-sorption linetype of wood did not be changed by the high temperature treatment. Both the high temperature heat treated samples and untreated samples exhibited the typeⅡisothermal adsorption linetype, but the slope of samples could be influenced by heat treatment. The effective specific surface area of the two species significantly reduced after heat treatment, and the higher the temperature, the more obvious the specific surface area decreases. The influence of the high temperature heat treatment on the decline proportion of the effective surface area were similar to the decline pro-portion of the equilibrium moisture content. The research results could be used for scientific evaluation of moisture ad-sorption characteristics of wood and the relevant data also could be utilized as a reference in actual wood high tempera-ture heat treatment production.%研究了高温热处理对欧洲云杉和花旗松平衡含水率及吸湿特性的影响.采用水蒸气作为保护介质,设定160,180,200和220 °C 4个温度条件下进行高温热处理2h,以双室温、湿度控制法获得等温吸附曲线,并采用GAB模型拟合,分析高温热处理对木材水蒸气等温吸附曲线线型、平衡含水率、有效比表面积的影响.结果表明:高温热处理可以显著降低2个树种试样的吸湿平衡含水率,处理温度越高,平衡含水率下降值越明显,220°C处理后试样的平衡含水率相较于未处理材的平衡含水率下降可达40%以上;利用GAB吸附模型能够较好地描述高温热处理欧洲云杉木材和花旗松木材的等温吸附过程,等温吸附线拟合度较高(拟合度决定系数均高于0.98).高温热处理并未改变木材等温吸附线的线型,高温热处理试样和未处理试样均呈现第2类等温吸附曲线特征,但热处理会影响等温吸附曲线斜率;高温热处理后2个树种试样的有效比表面积显著降低,处理温度越高,有效比表面积下降值越明显,且试样高温热处理后比表面积相较于素材的下降比例与平衡含水率受高温热处理的影响相近.本研究可为热处理木材吸湿特性科学评价及实际高温热处理木材生产提供参考.
    • 姚利宏; 徐伟涛; 费本华; 王喜明; 郝一男
    • 摘要: The nail connection is an important joint in the wood structure,and plays an important role in the shear wall of the light wood structure.This study focused on the connections of the light wood structure building shear wall,30 kinds of connections of Douglas fir and spruce pine fir nailed with structure of plywood,OSB with different diameter single nail,tensile mechanical properties and failure displacement were studied.The results show that the nail size,panel type for and wood species have significantly influence on tensile properties and fracture displacement between Douglas fir and spruce pine fir joint.6D nail Douglas fir connection lateral tensile strength is greater than the spruce pine fir;8D nail Spruce pine fir connection lateral tensile strength greater than Douglas fir;10D nail connection between two kinds of wood have consistent force values.Failure displacement tendency between Douglas fir and spruce pine fir with different scale nail connection is similar,with the increase of nail scale,the displacement have significantly difference;Failure displacement of 10D nail Douglas fir and spruce pine fir have consistent value trend,the 22 mm thick OSB connected spruce pine fir with 10D nail have the largest failure displacement.%钉连接是木结构中重要的连接节点,在剪力墙中起到重要的承载作用.笔者针对轻型木结构建筑剪力墙关键的连接节点,对花旗松、云杉与不同厚度结构胶合板、定向刨花板用不同结构单钉连接的30种连接节点的侧向抗拉力学性能和破坏位移进行了比较研究.研究结果表明,钉子的尺寸、覆板种类与花旗松和云杉木材形成的连接节点侧向抗拉力学性能和破坏位移影响显著.6D钉连接花旗松侧向抗拉力值大于云杉;8D钉连接云杉侧向抗拉力值大于花旗松;10D钉连接两种木材节点力值趋势一致;花旗松和云杉与不同钉尺度连接节点破坏位移趋势相似,随着钉尺度的增加,破坏位移差异显著;10D钉连接两种木材节点破坏位移趋势一致,云杉与22 mm厚定向刨花板用10D钉连接,节点破坏位移最大.
    • 马义
    • 摘要: 花旗松是北美洲最高产和最有价值的树种之一,欧洲是引种最早和引种规模最大的区域.文章综述了欧洲引种花旗松的研究概况,以期为其它国家引种应用花旗松提供参考.
    • 高鑫; 周凡; 付宗营; 周永东
    • 摘要: 研究了高温热处理对欧洲云杉和花旗松平衡含水率及吸湿特性的影响。采用水蒸气作为保护介质,设定160,180,200和220°C4个温度条件下进行高温热处理2 h,以双室温、湿度控制法获得等温吸附曲线,并采用GAB模型拟合,分析高温热处理对木材水蒸气等温吸附曲线线型、平衡含水率、有效比表面积的影响。结果表明:高温热处理可以显著降低2个树种试样的吸湿平衡含水率,处理温度越高,平衡含水率下降值越明显,220°C处理后试样的平衡含水率相较于未处理材的平衡含水率下降可达40%以上;利用GAB吸附模型能够较好地描述高温热处理欧洲云杉木材和花旗松木材的等温吸附过程,等温吸附线拟合度较高(拟合度决定系数均高于0.98)。高温热处理并未改变木材等温吸附线的线型,高温热处理试样和未处理试样均呈现第2类等温吸附曲线特征,但热处理会影响等温吸附曲线斜率;高温热处理后2个树种试样的有效比表面积显著降低,处理温度越高,有效比表面积下降值越明显,且试样高温热处理后比表面积相较于素材的下降比例与平衡含水率受高温热处理的影响相近。本研究可为热处理木材吸湿特性科学评价及实际高温热处理木材生产提供参考。
    • 李杨; 罗廷芳; 于帅帅; 申丽娟; 李明
    • 摘要: 针对胶合木梁声发射无损检测问题,研究花旗松胶合木梁声发射信号时频域特征及其传播规律,以及微弱声发射信号的小波分析方法.首先采用NI高速数据采集设备及LabVIEW软件构建木材声发射信号采集平台,然后通过铅芯折断模拟声发射源,分析声发射信号在表面和厚度方向上的时频域特征及传播速率,最后针对铅芯滑动引起的微弱声发射信号,采用小波分析方法重构声发射信号波形.研究表明,采用铅芯折断模拟声发射源时,花旗松胶合木梁表面和厚度方向的声发射信号频率都集中在70 kHz左右,且声发射信号沿表面传播速率更大,但沿厚度方向的信号衰减更加明显.对于“淹没”在噪声中的微弱声发射信号,采用小波分析的方法能够有效重构声发射信号波形.研究结果为花旗松胶合木梁声发射无损检测提供必要的基础理论依据.%Aiming at the issue of nondestructive test of the beam made from the glued laminated timber (glulam) of Douglas fir (Pseudotsuga menziesii) based on acoustic emission (AE),time and frequency domain characteristics and propagation of the AE signals of the beam,as well as the application of wavelet analysis method to control the weak AE signals were investigated.Firstly,a wood AE signal acquisition platform was set up by using NI high speed data acquisition equipment and the LabVIEW software.Then the time domain characteristics and propagation velocity of AE signals in the surface and thickness direction by the simulation of AE source under lead core fracture were analyzed.Finally,the wavelet analysis method was used to reconstruct the waveform of AE signal for the weak AE signal caused by the sliding of the lead core.The results showed that the AE signal was mainly concentrated about 70 kHz in the beam when lead core fracture was used.The propagation velocity of AE signal was greater on the surface,but the signal attenuation along the thickness direction was more significant.In addition,as for the "weak" AE signals submerged in noise,the wavelet analysis method could effectively reconstruct the AE signal waveform.The results of the study could provide the necessary theoretical evidence for Douglas fir Glulam AE nondestructive test.
    • 刘献奇; 赵湘玉; 钟楷
    • 摘要: 以5mm厚花旗松薄板为研究对象,分别在160 °C、180 °C、200 °C、220 °C热压温度、40%厚度压缩率、15 min、30 min、45 min保压时间条件下,分析不同处理温度及保压时间对花旗松压缩薄木力学性能的影响,探索其最佳压密工艺.
  • 查看更多

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号