应用在地下工程施工中的新技术（Ⅱ）

为有效保护地面上的生态环境，开发利用地下空间资源并营建新世纪的地下水城，在新的21世纪里将会建造更多的地下工程以满足人们生产生活的各种需要。文中介绍了地下工程施工中采用的逆作法、盾构法、新奥法、沉管隧道、顶管工程和大型沉井施工新技术，供同行们参考应用。     

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本文根据物质平衡原理,对于定容和水驱凝析气藏提出了预测采收率的方法,并提出了凝析气藏的总采收率与干气和凝析油采收率的关系式。     

微电量测量中信号的拾取和放大

本文介绍了静电计级运算放大器在工业微电量测量中的应用,并且给出了实际的电路结构和相关的噪声解决办法。     

Thermodynamic Analysis of Various Dehumidifying Dryers for Wood

Typical methods of dehumidification of air circulating in the dehumidifying driers (indirect and direct cooler and partial exchange of the air) were analysed. Energy aspect of cooler operation was evaluated. The method for minimization of unit thermal energy consumption in a dehumidifying drier by the optimal selection of the cooler point was also given. Methods of the heat recovery of heat conveyed in a cooler lending to save energy (heat regeneration. expansion and compression of the air, a dehumidifier) were analysed. It was indicated that introduction of dehumidifiers into contemporary wood driers caused significant improvement of energy aspects of their operation     

余热利用系统多目标优化模型及应用

以炭黑生产中的余热利用系统为背景建立了余热利用系统多目标优化规划数学模型;阐述了模型的求解方法;给出了实例分析。     

Recovery of monomers and fillers from high-temperature-vulcanized silicone rubbers—combined effects of solvent, base and fillers

The depolymerization of high-temperature-vulcanized (HTV) silicone rubbers containing filler silica and alumina into cyclosiloxane monomers and spontaneous recovery of fillers were studied. First, HTV silicone rubber was treated with different types of solvents in the presence of KOH to find that a triad mixture of diethylamine, methanol and hexane was appropriate not only to dissolve the silicone rubber to a suspension but also to separate fillers completely by filtration. The filtrate was distilled to remove solvent first and then give pure cyclosiloxane monomers in 76–84% yields. Second, the rubbers were treated with other types of triad mixture of solvents and bases, e.g. tetramethylammonium hydroxide, hexane and diethylamine. After filtration, residue was again treated with the amine and hexane to recover clean fillers in 83–93% yields. Cyclosiloxane monomers were also obtained from the combined filtrates in 67–78% yields.     

砷化镓声电荷转移延迟线的设计与工艺研究

由于声电荷转移(ACT)这一新颖的高速缓冲抽样技术的发明,使得新一代高速高频信号处理器件的实现成为可能。本文研究了第二代平面结构的ACT器件转移沟道的电位分布特性,给出了平面结构ACT延迟线的设计,并研究了ACT器件的工艺实现。     

雁翎油田注氮气提高采收率工艺技术

在现有的提高采收率方法中,注气驱是应用较广、效果较好的方法,特别是注氮气驱由于其气源广泛、价廉经济、无腐蚀性,以及要求的油藏地质结构特征和原油的物理性质等因素的变化范围广泛等特产,这种提高采收率的方法应用的最为普及,代表了目前提高采收率的发展方向。结合雁翎油田实例,简要介绍了注氮气提高采收率的机理、注气井组建设、制氮工艺及注气后的采油完井方式、方法。     

钨铜合金药型罩及其性能

钨铜合金药型罩的应用可以提高射流对均质钢靶的侵彻能力.这一提高得益于射流密度的提高以及断裂时间的延长. 本文对钨铜合金射流及其断裂形态通过X光照像进行了研究.它的旋转效应及其炸高特性也进行了实验研究. 钨铜合金药型罩的威力实验在φ30 mm的破甲弹上进行.在相同装药条件下与紫铜罩相比,威力提高20～30%.     

定量电子晶体学硼对Ni3Al的电荷密度分布的影响

阐述了定量电子晶体学测定晶体电荷密度分布的基本原理和方法，不足之处和改善途径。以硼对Ｎｉ３Ａｌ的电荷密度分布的影响为实例，介绍了定量电子晶体学在研究晶体电子结构方面的应用前景。