动能杆定向抛撒散布场仿真

在对目前的新概念定向动能杆反导战斗部作用机理研究分析基础上，利用动能杆条定向抛撒速度及散布规律的工程计算模型进行数值模拟，并与有关文献试验结果相对比，结果表明该计算模型能为工程设计提供帮助。运用该计算模型，采用Shot-Line模型和虚拟现实编程技术，对杆条散布场进行了三维仿真。     

贴片胶涂布工艺技术的研究

主要介绍贴片胶的特性,在各种工艺下的使用方法及使用中出现的不良与对策,并给出了典型温度曲线以及温度曲线上主要控制点的工艺参数。     

Draught beer hygiene: a survey of on‐trade quality

The quality of draught beer in 57 on‐trade licensed premises in 10 locations in the UK Midlands was assessed using a forcing test. Of 149 samples of standard lager (‘SL’, abv ≤ 4.2%), 44% were in the ‘excellent’ quality band compared with 16% of 88 samples of keg ale (‘KA’, abv ≤ 4.2%). Of the total of 237 samples, >90% were represented by two lager and two ale national brands. There were differences in the quality index (QI) between the brands, with lager SL3 having a QI of 84% compared with 72% for lager SL6, 71% for ale KA5 and 68% for ale KA1. The susceptibility of the four brands to spoilage was assessed using a challenge test with microorganisms taken from forced draught beer samples of the brands. Ale KA5 (challenge test QI = 87.5%) was the most resistant to spoilage followed by lager SL3 (81.3%), lager SL6 (75%) and ale KA1 (62.5%). Keg beers in accounts with a national cask beer quality accreditation had the same QI as those without accreditation. Analysis of price vs quality showed that the most expensive price band had the lowest quality. Draught beer quality declined as the number of dispense taps increased across the bar. It was also noted that dispense into branded half‐pint glasses had variable take‐up, with lager SL3 served in the correct branded glassware on 71% of occasions but only on 5% of occasions for lager SL6. None of the keg ales were served in correctly branded glassware. © 2018 The Institute of Brewing & Distilling     

子母弹抛撒机构均相流内弹道数值模拟

介绍了双燃烧室活塞式子母弹抛撒机构 ,利用均相流理论 ,建立了高压室均相流内弹道方程组 ,和低压室经典内弹道方程组 ,利用数值模拟得到了燃烧室的 p～ t曲线和子弹的抛撒速度 ,并对高压室内的压力波进行了分析 ,提出了一些减小压力波的措施     

Removal of Microbial Biofilms from Dispense Equipment: The Effect of Enzymatic Pre‐digestion and Detergent Treatment

Microbial biofilms can form in dispense outlets as a result of poor or inadequate cleaning and can be difficult to remove using conventional practices. Enzymatic cleaners might help to remove biofilms by degrading the exopolysaccharide layers in which the microbes are embedded. A multispecies biofilm comprising wild type dispense isolates of Flavimonas oryzihabitans, Lactobacillus brevis, Leuconostoc mesenteroides and Saccharomyces cerevisiae was generated on a section of tubing and fitted into a pilot dispense system, which was left uncleaned for 12 weeks. After cleaning approximately 10⁴ viable aerobes and 10³ viable anaerobes were still present. Stainless steel coupons and pieces of dispense line contaminated with biofilm were incubated in the laboratory with an enzyme mix containing varying proportions of α‐amylase, β‐glucuronidase, glucose oxidase, dextranase, protease and pectinase. Cultures grown on stainless steel had significantly (F pr. > 0.05) less viable cells than non‐enzyme treated biofilms, but this was dependent on the microbial species. Typically Lactobacillus brevis was most susceptible to the enzyme treatment. Cultures grown on dispense line were much more resistant to enzymatic digestion. Pre‐digestion with protease was most effective for removal of Lactobacillus brevis and Leuconostoc mesenteroides but not for Saccharomyces cerevisiae and Flavimonas oryzihabitans. In the simulated bar, pre‐digestion with protease reduced the viable cell count by 0.64 log units for the aerobes and 1.9 log units for the anaerobes. This study demonstrates that pre‐digestion with enzyme solutions before line cleaning is useful for treating heavily contaminated lines in trade.     

The Impact of a Dynamic Two‐Step Solution Process on Film Formation of Cs0.15(MA0.7FA0.3)0.85PbI3 Perovskite and Solar Cell Performance

This paper provides deep understanding of the formation mechanism of perovskite film fabricated by sequential solution‐based methods. It compares two sequential spin‐coating methods for Cs_0.15(MA_0.7FA_0.3)_0.85PbI₃ perovskite. First is the “static process,” with a stoppage between the two spin‐coating steps (1st PbI₂‐CsI‐dimethyl sulfoxide (DMSO)‐dimethylformamide (DMF) and 2nd methylammonium iodide (MAI)‐formamidinium iodide (FAI)‐isopropyl alcohol). Second is the “dynamic process,” where the 2nd precursor is dispensed while the substrate is still spinning from the 1st step. For the first time, such a dynamic process is used for Cs_0.15(MA_0.7FA_0.3)_0.85PbI₃ perovskite. Characterizations reveal improved film formation with the dynamic process due to the “retainment” of DMSO‐complex necessary for the intermediate phase which i) promotes intercalation between precursors and ii) slows down perovskite crystallization for full conversion. The comparison on as‐deposited perovskite before annealing indicates a more ordered film using this dynamic process. This results in a thicker, more uniform film with higher degree of preferred crystal orientation and higher carrier lifetime after annealing. Therefore, dynamic‐processed devices present better performance repeatability, achieving a higher average efficiency of 17.0% compared to static ones (15.0%). The new insights provided by this work are important for perovskite solar cells processed sequentially as the process has greater flexibility in resolving solvent incompatibility, allowing separate optimizations and allowing different deposition methods.     

钢铁企业订单变动执行的物料调配与跟踪算法

在面向订单的钢铁企业生产中,物料的借用现象非常普遍,给物料跟踪带来了难度.为此.提出订单变动执行的物料调配与跟踪算法.在物料借用图模型的基础上,给出物料借用的平衡条件,分析了物料调配造成的各订单的交货期的变动情况,进而建立物料调配优化数学模型.该模型以库存费用和任务拖期费用最小为目标函数,可看作是单位运价同运输方案相关联的一类特殊"运输问题"的数学模型,给出了利用表上作业法求解此类特殊问题的关键步骤.最后,通过算例证明了该方法的有效性.     

基于模糊特征向量的差异驱动模糊决策算法

为了识别多属性专家决策的差异,在常规模糊决策矩阵的基础上,采用协方差的定义,构建了模糊协方差相似决策矩阵,提出了基于模糊协方差相似矩阵的模糊特征向量简化算法的多属性差异驱动模糊决策法,该方法从整体上体现决策信息的离散投影,具有较好的客观性和透明性。验证实例的对比结果说明了该方法的有效性。提出的算法对于属性与方案关系比较复杂,难以直观地确定各属性与方案相对重要性权重的决策应用(如多层次的流程工业优化与调度决策)具有较好的应用前景。     

一种新型中药配方自动调配系统

本文介绍了作者作为系统软件的主要设计者研制成功的一种新型中药配方自动调配系统的研制。该系统已经在广东某中医院、北京多家医院付之使用多年,系统灵活可靠。