【摘 要】
：
Natural durability of two plantation woods, Chinese fir and I-214 poplar, was investigated thoroughly by three testing methods, namely an accelerated laboratory
论文部分内容阅读
Natural durability of two plantation woods, Chinese fir and I-214 poplar, was investigated thoroughly by three testing methods, namely an accelerated laboratory decay test, a fungus cellar test and a field test. Aft er the decay test using Postia placenta and Trametes versicolor, Chinese fir and the I-214 poplar showed 34% and 69% of mass loss, respectively, indicating they should be classified as slightly durable and non-durable wood. This conclusion was confirmed by the fungus cellar test and the field test. Like the performance in the decay test, I-214 poplar showed no resistance to termites either in the laboratory or in the field,whereas Chinese fir would be classified as moderately resistant.
其他文献
On the basis of CMAC-PDM (Pattern Discrimination Model), a novel algorithm of CMAC for monitoring machine degradation is proposed in this paper. The output of C
To determine workspace and relationship between the workspace and geometry of parallel manipulator is important for optimum design of parallel manipulators. In
针对“电压串联负反馈对输入电阻的影响”实验中出现的测试结果和理论分析不一致的问题,讨论了相关理论存在的条件,给出了实验电路转化为此条件下有关输入电阻的结论,并通过
This paper presents a linearized approach for the controller design of the shape of output probability density functions for general stochastic systems. A squar
针对忻州市供热公司供热锅炉在超负荷下运行出现严重结垢的实际情况,分析了严重结垢的主要原因,在保证锅炉安全、稳定、经济运行的前提下,提出了改进措施和建议,解决了锅炉超
Galloping of conductor is a major hazard to safe operation of transmission lines. This paper introduces the basic galloping stability mechanism of conductor, de
介绍了桥梁桩基完整性检测常用的检测方法-反射波法的基本原理和一般应用范围,通过工程检测的实践经验总结了几点检测结论中容易出现的几个误区.
With developments of technology of computer and network, researching on distributed measurement system becomes one of the hot problems in the field of automatic
水利水电工程建设的"三制"以合同管理为核心内容,从事水利水电工程建设,要树立强烈的合同意识;介绍了水利水电工程建设普遍采用的合同条款;阐述了作为水利水电工程建设项目的
SA8000标准推行以来,中国已获得认证的企业多数是应进口商要求认证的,导致SA8000标准认证推行困难的原因较多,但其中一个不容忽视的原因是认证费及相关费用过高,特别是相关费