电动机驱动管道增压压缩机采用先进的无级变速机械装置的优越性

论述电动机驱动管道增压压缩机比燃气轮机驱动具有环保和经济两方面优势，是一种发展趋势；介绍了一种先进的无级变速机械装置一变速行星齿轮的原理；对变频电动机驱动和用变速行星齿轮电动机驱动两种装置的经济和各项指标进行比较；介绍变速行星齿轮在中国的业绩和在美国天然气管道增压站的使用业绩；指出采用变速行星齿轮的优越性以及众多工程公司和压缩机制造厂选用变速行星齿轮的成功经验，展望变速行星齿轮在天然气管道输送方面较大的发展潜力。     

HNS—IV为基的传爆药配方设计及性能研究

选择氟聚物BF作为粘结剂，开展了HNS—IV为基的传爆药配方设计研究，测试了配方的热安定性、内相容性和热感度。依据G／B2178—1994对该配亨进行了安全性鉴定试验。结果表明：该配方有着优异的热安定性和安全性，可用于直列式传爆序列装药。     

Factors associated with the premature graduation of children into seatbelts

This study investigated the factors associated with the premature graduation into seatbelts for Australian children aged 4-11 years. From 699 child restraint use questionnaires, 195 children were identified as meeting the booster seat height-weight criteria (height: 100-145 cm and weight: 14-26 kg). Of these children, 44% were correctly traveling in a booster seat, while 56% had been moved prematurely into a seatbelt. A multivariable logistic regression model showed that there were a number of key predictors associated with the premature graduation to seatbelts. For example, children who were moved prematurely into a seatbelt were more likely to be older, have other children travelling in the vehicle and have younger parents compared to children appropriately restrained in a booster seat. In addition, there was a significant interaction between vehicle type and parent's household income. Based on the findings of this study, a number of recommendations are made for strategies to enhance appropriate restraint use for this age group, as well as for future research.     

基于LabVIEW的助力器下壳体测试台设计

汽车助力器下壳体包括了助力器的全部功能部件, 在测试过程中, 首先, 将模拟助力器上壳体零件和助力器下壳体压装在一起, 然后, 开始测试助力器的多项性能数据, 最后, 分离模拟助力器上壳体零件和助力器下壳体, 将合格的助力器下壳体送达下一工序。助力器下壳体测试台主要用于测试助力器的性能指标, 测试过程快速, 可靠, 保证了助力器的出厂质量。测试台由气动单元, 真空单元, 加力单元和控制单元组成, 融合了液压与气动, 传感器与检测等多项技术。     

双向压药工艺在传爆药柱生产中的应用

介绍了双向压药工艺的理论根据、原理及发展情况。这种工艺可以提高大尺寸传爆药柱的内在质量，药柱成型性好，而且密度分布均匀。     

基于Rockwell现场总线的天然气增压站自动控制系统

根据增压站控制要求,通过Rockwell现场总线来对增压站组建监控系统,运用RSLinx、RSLogix5000、和RSView32编程软件,对增压站各个主要参数实现本地和远程监控,提高了当前增压站自动控制水平;该增压站自动控制系统,不但提高了数据检测的准确性、可靠性和安全性,而且大大减轻了员工的工作强度。     

八面河油田小修作业打捞防砂管柱技术

由于八面河油田特殊的地层物性及井身结构,打捞防砂管柱工作量一直居高不下,采用小修作业打捞防砂管柱存在许多技术难题。对小修作业打捞防砂管柱进行改进后,可形成一系列配套技术,对八面河油田修复套管具有重要的实际意义。     

PBX传爆药制造中的界面化学问题

利用界面化学原理分析了PBX型传爆药配方中高分子粘结剂与炸药晶体粘结力的来源,讨论了溶液混合蒸馏工艺和水悬浮工艺中的润湿模型;根据动力学原理分析了工艺条件对包覆效果的影响,并指出目前存在的问题和今后的发展方向。     

液力平衡增压注水泵的使用及平衡改造

液力平衡型增压注水泵在工作过程中对压力的平衡有较严格的要求,平衡系数须在规定的范围內才能保证水泵的正常工作。对于压力匹配不能满足水泵工况要求的情况,可通过改变水泵柱塞直径、改变水泵流量及改造泵头结构等方法,调整压力匹配,保证水泵的正常工作。     

Automation in detection of recirculation in a booster fan ventilation network

Recirculation is prohibited in many coal mining countries because of the fear that the re-use of return air would allow the build-up of air contaminants at the workings. The incorrect design and location of a booster fan in any ventilation network can create unsafe condition due to recirculation. The current approach to investigating recirculation using simulation software requires manual effort which becomes tedious in a complex and a large network. An algorithm-based C++ program was designed to detect the recirculation in a booster fan ventilation networks. This program needed an input file prepared from output file generated by any ventilation simulator. This program created an output file for recirculation. This program demonstrated the strong capability to detect the recirculation in a sample network and a coal mine ventilation network. The outcomes of this program were documented in this paper.