输送木片螺旋机的结构特点

螺旋机作为一种输送设备在矿山、水泥、粮食和造纸等行业中已得到了广泛的应用,一般适用于输送粉状、粒状的物料。在木片厂中,由于场地的限制,输送木片也会用到螺旋机。因木片的流动性比较差,使用螺旋机输送木片,其结构特点与输送其他物料的螺旋机有所不同,如果采用同一结构形式,就会出现送料不畅和堵料等现象,影响生产的正常进行。分析螺旋机在输送木片中的一些结构特点。     

ABT生长剂在毛竹笋材两用林上的应用

通过分析施用不同型号的ＡＢＴ生长剂对毛竹笋材两用林的发笋率、笋产量和新竹产量的不同影响，选择最佳ＡＢＴ剂型或组合。结果表明，质量浓度为４０ｍｇ·Ｌ－１的ＡＢＴ４号和ＡＢＴ５号混合使用对竹笋与竹材的产量提高为最佳，与对照组相比，发笋率提高了２８５％，笋产量提高了２９２％，新竹竹材产量提高了３００％。在笋材两用林中施用ＡＢＴ生长剂，竹笋与竹材的产量均有大幅度的增加。表３参１     

Factors of affecting the spring back of compressed Paulownia wood

lnstructionP8ulowniagenus(PauIOwnissieb.atZucc.)isorigina'tedfromSoutheastAsiaandintroducedintoEurope,NorthAmericaandAustraliaforplantation(Giebeler1983).Thereare9speciesand2varietiesinthisfamily(Zhu1981).PaulowniatreeisonekindofgrowingfasttimberinChinawithabroaddistributioninallthecountry.ThemaintimberproducingareaisinnorthernplainofChinainwhichtheP8ulowniaisplantedwithcrops.ItiswellacceptedbyChinese,Japanese,Koreanduetoitsbeautifulgrainandlovelylusteraswellasitsstabledimension.Thecro…     

不同产地河北杨木材纤维形态的研究

对６个不赠地河北杨木材纤维形态、组织比量，木材密度等材性指标进行了研究。结果表明：６个不同产地河北杨均适宜用做纤维原料，其中陕西吴旗，甘肃皋兰，陕西横山地三产地河北杨材性综合评估较估优，可做最佳产地优树。     

木材水运工程选址的多目标灰色局势决策

论述灰色局势决策方法的基本原理及其在木材水运工程选址中的应用 ,应用该方法进行工程选址 ,可以克服传统方法的局限性 ,使结果更加科学合理     

金沙江木材流送工艺改革的探讨

从１９７１年开始，进行金沙江单漂流送木材，由于该工艺存在着作业时间长，木材损失大等缺点，有必要进行工艺改革，随着广大铁路、南昆铁路的建设，给工艺改革创造了良机。其内容是：金沙江木材流送分两段进行；龙蟠以上７２０ｋｍ江道为上段，进行中洪水位单漂流送，在龙蟠出河，汽运大理中转，三江口到格里坪３８０ｋｍ江道为下段，仍采用现行工艺。本文对该改革的可行性，优点进行了论证。     

Looking at computer-visualized interior wood: A qualitative assessment using focus groups

The objective of this study was to explore and gather human reactions and perceptions on computer visualizations of interior wood. The subjective qualities of such products are important because they infl uence the most critical of consumer decisions: to buy or not. To learn more about a phenomenon than quantitative data can provide, qualitative methods are needed. Here, grounded theory was used with focus groups to form a map of 14 people’s experiences of wood. Six computer-generated pictures with visible wood were varied into 18 pictures, such that two-by-two comparison resulted in 3500 words. These were combined into a map that was generated earlier, which had found 2000 words. The main dimensions found were light, color, unity, and authenticity. Light is more than brightness; shadows and lighting seemed more important for the wood feeling, and color and contrast gave life and warmth to the material on the screen. Respondents wanted wood that was more “woody” and “warmer” than wood actually is, that is, a hyper-realistic picture. Perhaps smart modification rather than photorealism should be the goal. Distribution of the earlier found activity and harmony was important for most respondents. In addition, many subjects discussed the composition and/or the context or purpose of the pictures. The impact of wood is not just related to the wood itself; it is also intertwined with its surroundings.     

优良笋材两用竹种乌芽竹的初步研究

乌芽竹适应性广，山地、平原、水湿地、房前屋后均能生长，且发鞭发笋率高，经济效益显著。笋产量１５７４４ｋｇ／ｈｍ￣２，留养竹９６９０株／ｈｍ￣２，平均胸径３．５ｃｍ，净收入３１９６０．３２元／ｈｍ￣２·ａ￣（－１）。新造竹林成林快，投产早，２～３ａ即可成林，３～４ａ可产笋出售。     

抽提物对木材渗透性影响的研究

本文研究了我国东北四种常见木材的抽提物对渗透性影响的变化规律,测量了木材抽提前后渗透性的改变,应用电子显微镜观察了木材抽提后微观结构的变化,分析和探讨了未材抽提对渗透性影响的机理。结果表明,木材经过四种方法的抽提以后渗透性均有不同程度的提高。木材渗透性的提高与抽提时间成线性关系。抽提改善了木材内部流体流动的通路,提高木材渗透性的内在原因是除去了纹孔膜上的结壳物质。