长白落叶松纸浆林木材材性及纸浆特性的研究

长白落叶松纸浆林木材材性及纸浆特性的研究王树力，吴济生，仲崇淇（黑龙江省林业科学研究所哈尔滨１５０００４０）关键词长白落叶松，纸浆林，材性分析，纸浆特性纸浆林培育过程中，生物量是所有培育者关心的问题，而纸浆材材性及纸浆特性也是十分重要的内容，它涉及到...     

配筋混凝土砌块高层设计时应注意的几个问题

针对配筋混凝土砌块高层设计,提出砌块空腔墙的应用,注意合理设置水平配筋,配筋砌块深梁,控制底框房屋层间抗侧刚度比及高层墙体的裂缝问题.     

Rapid assessment of wood chemical properties and pulp yield of Eucalyptus camaldulensis in Thailand tree plantations by near infrared spectroscopy for improving wood selection for high quality pulp

Near-infrared (NIR) spectroscopy has been demonstrated as a means for rapid nondestructive determination of the chemical composition and final pulp yield of Eucalyptus camaldulensis in Thailand tree plantations. Multiple linear regression (MLR) analysis and partial least squares (PLS) analysis were introduced to develop statistical models in terms of calibration equations for total pulp yield, screened pulp yield, and contents of -cellulose, pentosans, and lignin in wood. In MLR analysis, a reasonably good calibration equation was found only for pentosans (standard error of prediction (SEP): 0.98%). The PLS analysis improved the accuracy of prediction for every criterion variable, especially for pentosans (SEP: 0.91%) and lignin (SEP: 0.52%). Also, in the case of screened pulp yield, we were able to use such a statistical result as an indicator of the characteristics of the pulp and paper. Thus, NIR spectroscopy could be satisfactorily used as an effective assessment technique for Eucalyptus camaldulensis plantation trees.     

杨桦纸浆用材天然林营林措施的研究

采用固定标准地定位观测和临时标准地调查点面结合的方法，经研究天然杨桦林林分经营密度。对杨桦林各径级株数分布以厦胸径与小头直径相关关系的综合分析，得出林分平均胸径和平均树高的生长进程规律厦林分最佳经营密度模型，提出了天然扬桦纸浆材用材林定向培育的技术措施。结果表明：采用该项技术，山扬林和白桦林林分单位面积生长量分别可提高14.0％和8.90％。     

赤桉纸浆原料林丰产栽培技术

赤桉，抗逆能力强，速生丰产，引种成功率高，萌芽更新能力强，经济效益短，平，快，是造纸业的优质原材料，是一个值得大力推广和发展的好树种，计划中外合资在泰和县营造赤桉纸浆林基地1667hm2，对赤桉纸浆原料丰产林栽培技术作了叙叙述。     

麦草酸水解制取糠醛和纸浆的研究

提出一种采用稀硫酸水解，综合利用麦草、制取糠醛和纸浆的方法。通过对水解反应影响因素的探讨．发现较优 化的水解工艺条件为用酸量20％、时间180min、最高温度110℃、液比15洗浆废水和精馏后废水的污染负荷远低于常规碱法草浆厂废水的污染负荷，且低于GB3544-92规定的造纸工业废水排放二级标准。     

ZMCJ型系列纸浆模快餐具生产线可行性分析

分析了纸浆模快餐具的生产成本，对产品市场前景和生产线投资规模进行了预测，介绍了产品工艺流程及生产设备。     

COMPUTER AIDED DESIGN OF THE CORE AND CAVITY OF PLASTIC INJECTION MOULD

This paper discusses the designing of the injection mould for producing the plastic case of TV set carried out in the type IBM PC/XT (or Great Wall 0520)micro-eomputer. The procedure consists of inputting the 2-D drawings of the TV set case with the aid of sub-drawing, coding and menu specifying; setting up the mathematic model according to the relationship between the plastic part and the mould; designing the core and caving of the mould and finally displaying and plotting the drawing of the mould. The connection between the Auto CAD software and the advanced language for orogramming and the data convertion is also discussed.     

尖尾苏铁根系类型与解剖结构研究

研究了尖尾苏铁根系的形态及解剖结构。首次发现苏铁植物的根系属须根系，全部须根膨大成肉质根，同一条肉质根内的原生木质部束呈现二原型至九原型。皮层簿壁细胞多达80层以上，细胞内含丰富的淀粉粒；分泌腔常见。这些发现为揭示苏铁类植物对恶劣环境的适应机制有重要意义。