万科健身会所暖通空调设计

本文介绍了万科健身会所暖通空调系统的主要设计参数、冷热源、风系统、水系统、防排烟设计及自动控制等内容。     

抽气式感烟探测系统的设计及应用

本文对抽气式感烟探测系统进行了介绍,针对其监测的不向对象设计出吸气导管的多种布置型式。同时结合工程实例设计出结构简单、安全可靠、报警时间短的抽气式感烟探测系统,得出使其既经济又有效应用的关键是要设计出适合监测对象的吸气导管的布置型式及吸气导管的直径、吸气孔的孔径和间距等。     

关于高层建筑地下汽车库通风防排烟系统设计的几点看法

高层建筑地下汽车库面积大,其通风防排烟系统有着重要的意义。对兼用系统提出几点看法。     

Effect of freezing on the physicochemical, textural and sensorial characteristics of salmon (Salmo salar) smoked with a liquid smoke flavouring

This study reports the effect of different refrigeration/freezing treatments on the physicochemical, textural and sensorial properties of farmed Atlantic salmon (Salmo salar) treated with a commercial liquid smoke flavouring. Observations were made on three groups of fillets - group RFS: salted, smoked and stored at 4 °C; group BFS: frozen at −25 °C for 24 h, thawed, salted, smoked and stored at 4 °C; and group AFS: salted, smoked and frozen at −25 °C for 24 h and stored at −18 °C - over a period of 45 days. Scores (on a scale of 1-9) were provided for different sensorial attributes by a panel of 10 trained tasters. Sixty percent of the panellists consistently preferred the AFS fillets. The maximum shelf life associated with each treatment was defined as the last sampling day on which a mean score of ≤5 was awarded for the fillet sensorial attributes by ≥50% of the panellists. Freezing the salmon for 24 h before smoking (BFS) did not increase its shelf life (30 days) over that of refrigerated smoked salmon (RFS). In addition, the former treatment had a negative effect on the adhesiveness, cohesiveness, smoke odour intensity and colour intensity of the flesh. However, maintaining the fish frozen at −18 °C (AFS) increased its shelf life (>45 days) and invested the flesh with greater firmness, cohesiveness and colour intensity.     

一种高效实时的烟雾动画模拟方法

近年来，基于物理模型的烟雾模拟成为计算机动画领域中的一个研究热点。早期的基于物理的方法很难同时满足实时性和真实感的要求。文章采用流体力学无粘不可压欧拉方程组作为基本物理模型，添加漩涡约束力来描述流体中的漩涡，简化了数值模拟计算的同时保证了模拟的真实感。数值计算上，采用半拉格朗日方法、高斯一塞德尔迭代法等稳定的求解方法来实现大时间步长模拟，保证了模拟的实时性。实验表明，该方法是一种高效实时的烟雾动画模拟方法，而且模拟结果真实感较强。     

红外烟幕干扰材料在弹中的相容性

研究了红外烟幕干扰材料与弹中的红磷、漆的相容性，采用示差扫描热分析法（DSC）对各组分及其混合物进行测定，分析从室温到发生全分解反应过程中的热行为，根据GJB722A-97的相容性评价方法，对红外烟幕干扰材料与红磷、漆的相容性进行判定。结果表明：干扰材料与红磷、漆具有良好的相容性，可在弹壳中长期贮存。     

Experimental studies on time-dependent size distributions of smoke particles of standard test fires

The time-dependent size distributions of smoke particles are measured by SMPS spectrometer as experiments go on, respectively, for four standard fires, i.e. TF2, TF3, TF4 and TF5. The results suggest that, for the TF4, the normalized number distributions of smoke aerosol be best fitted with lognormal functions and little time-dependency be shown throughout the experiments. It is also indicated that the best fitting curves of the normalized number distributions of smoke particles change from the so-called under-lognormal fittings to over-lognormal fittings for the TF2, TF3 and TF5, as time moves. In addition, a common changing trend of the size distribution curves can be drawn for the three standard fires. Namely, the curves mainly drift toward larger diameters of smoke particles and the peaks of the curves keep increasing as time goes by for each standard test fire.     

柴油掺水乳化燃烧对NO_x与烟度排放的影响

作者对Ｇａｒｄｎｅｒ单缸柴油机掺水乳化燃烧与纯柴油进行对比试验，以检验对柴油机排放性能的影响。试验结果表明，柴油机燃用乳化柴油能有效地降低ＮＯｘ排放浓度，并对烟度排放亦有一定的抑制作用。     

烟道气烟尘的自动实时监测原理

讨论了用光电传感器对烟道气的标准烟色及烟尘颗粒物质量浓度进行在线实时监测的原理，给出了相应的标度变换。建立了适合于微处理器使用的近似计算的函数，并讨论了计算误差．