水力排烟机水轮叶片芯金属模的逆求工程设计

本文介绍了逆求工程技术在水力排烟水轮叶片芯金属模具设计中的具体应用，以及逆向工程的概念和集成系统组成。     

ABS阻燃与抑烟性的研究

对ABS树脂的阻燃、抑烟性等性能进行了研究和探讨。实验结果表明,采用共混、添加复合阻燃剂、抑烟剂的方法可以有效地获得阻燃、抑烟性及其他性能皆优的ABS树脂体系。     

SnO2和SiO2用于PVC的阻燃消烟及协同作用

研究了二氧化锡和二氧化硅对软PVC阻燃消烟性的影响。通过对极限氧指数、剩炭率、烟密度的测定和DTATG曲线的分析证明,添加8g二氧化锡/二氧化硅复合阻燃剂的PVC的氧指数和剩炭率比未添加的分别增高5.5个单位和4.1%,烟密度降低16.4%,降解活化能分别降低38kJ/mol和23.1kJ/mol,从而证明二氧化锡/二氧化硅复合阻燃剂对于PVC是一种很好的阻燃消烟剂,二氧化锡和二氧化硅有很好的协同作用。同时证明这种复合阻燃剂能代替三氧化二锑,使产品的成本进一步降低。     

Belgian Experiences in the Ozonization of Water

After reviewing the uses of ozone in the preparation of drinking water, high purity water for Pharmaceuticals industries, and swimming pools throughout Belgium, a discussion of technological developments made at the Tailfer plant (serving Brussels) concerning the uses of ozone is presented. These subjects include analytical and monitoring techniques developed for ozone, procedures for ozone contacting employed at this plant, treatment of ozone contactor off–gases, and the use of oxygen–enriched process gas to produce supplemental amounts of ozone required periodically. Capital and operating cost data are presented.     

尼龙6生产中注带处单体烟的回收

分析比较了尼龙 6生产中注带处单体烟的几种回收方法。利用萃取水与注带的单体烟在吸收塔内逆向传质吸收而将单体予以截留的工艺 ,对单体的吸收效果最好。单体的实际回收率可达 98%以上。讨论了影响吸收效率的主要因素及在吸收塔顶加装除沫器的设计     

少烟HTPB/AP/RDX/Al推进剂比冲效率分析

对少烟HTPB／AP／RDX／A1推进剂能量性能进行了理论计算，通过BSFφ165和φ315试验发动机试验，考察了试验发动机类型，工作压力对经冲效率的影响，而且与高铅含量HTPB／AP／RDX／A1推进剂的比冲效率进行了比较，结果表明，铅含量对推进剂的比冲效率有显著的影响，低铝配方的比冲效率比高铝配方的比冲效率相对要高些；对于推进剂组分确定的配方，合适选择发动机的工作压力，可以不同程度地提高比冲效率，对于同一类型推进剂配方，通过计算理论比冲，结合比冲效率水平，可以对实际比冲进行有效的预估。     

Aerosols sampling using a new cryogenic instrument

A new cryogenic instrument was designed for the trapping of aerosols such as cigarette mainstream smoke at low temperature. The technique enabled the trapping of the mainstream smoke of a single cigarette and the particulate and vapor phases were trapped simultaneously. 2R4F reference cigarettes were smoked under International Standard Organization (ISO) regime and trapped at low temperature using the cryogenic instrument. After trapping, the mainstream smoke of the 2R4F reference cigarette was diluted with a solvent and selected smoke components could be quantified using gas-mass spectrometry (GCMS) and high-performance liquid chromatography (HPLC). The capability of the instrument for trapping the mainstream smoke was demonstrated. The feasibility of the procedure for the detection and the quantification of a large range of smoke components including carbonyls, alkaloids and organic volatile compounds (VOC) in the mainstream of a single cigarette was also shown.     

Impact of sulfur-in-gasoline on motor vehicle emissions in the metropolitan area of Mexico City

Light duty gasoline vehicles account for most of CO, hydrocarbons and NO_x emissions to the urban environment in Mexico City. From the beginning of year 2001, vehicles comply with Tier 1 emissions standards. Two types of Regular gasoline are available in the country. In those ozone non-attainment areas Regular oxygenated gasoline with an average of 450 ppm S is available, while on the rest of the country, a gasoline of 750 ppm S, is sold. It is anticipated then that many or all Tier 1 vehicles in ozone non-attainment zones would be occasionally or regularly fueled with high sulfur gasoline. In this work we evaluate the impact of sulfur on new, and in-use vehicles model years 1993-2001 with gasoline ranging from 90 to 815 ppm S. It is interesting to note that for Tier 0 vehicles, CO emissions are above the standard limits at all sulfur levels, while Tier 1 vehicles are very close to the limits for NO_x emissions.     

超微细改性Al(OH)3填充LDPE/EVA的研究

Al(OH）3是LDPE／EVA主要的阻燃，消烟填充剂。研究了不同粒度，表面处理及填充量的Al(OH）3对LDPE／EVA的氧指数（OI），烟密度等级（SDR）和物理机械性能的影响。     

基于FCN-LSTM的工业烟尘图像分割

工业生产中常根据林格曼烟气黑度判断工业烟尘的污染等级,一种有效的方式是应用计算机视觉系统对工业烟尘进行监测, 其中对烟尘目标进行准确分割是该系统的关键技术。因为工业烟尘具有形状不固定、和云相似度高等特点,现有算法在复杂场景下对烟尘进行分割时容易受到干扰,分割准确度有待提高。针对这一问题,提出一种基于FCN-LSTM的工业烟尘图像分割方法,在全卷积网络对图像空间特征提取的基础上,使用长短时记忆网络提取图像序列的时间信息,通过烟尘的动态特征对运动的烟尘和背景进行区分,增强复杂场景下的抗干扰能力。实验表明,本文模型相比于全卷积网络,在复杂场景下的抗干扰能力有显著提升,能够有效克服来自云的干扰,对全卷积网络分割结果中易出现干扰点的问题也有改善,IoU指标最高有8.04%的提升。