基于故障树模型的导弹故障检测系统

实现了一种基于故障树模型的导弹武器故障检测系统。该系统结合可靠性工程中的故障树模型，提出一种系统故障检测策略。利用测点信息和故障树结点之间的逻辑关系进行由下至上的反向推理，最终得到一条故障检测最佳途径，并根据此方法实现了实验性故障检测系统。     

月季切花贮藏保鲜研究

针对贮藏过程中月季切花的保鲜问题,利用补充水分、营养及吸收杀菌剂,再喷复化学试剂,然后用功能性保鲜纸包装等处理手段,以在维持一定生命活性的基础上,减缓其新陈代谢、抑制衰败,从而达到在不影响切花正常的瓶插观赏期及观赏品质的前提下,延长贮藏期的目的。试验结果表明,经保鲜处理的月季切花,在试验条件下贮放５ｄ以上,其外观形态能够基本保持与贮前相同的程度,将保鲜贮放后的切花插于瓶中又能继续开放,达到与未经贮放切花所具有的相同观赏期及品质。     

浅谈中国工笔花鸟画在陶瓷新彩上的表现

论述中国工笔花鸟画的表现手法在陶瓷新彩装饰的结合运用,不同技法的结合追求具有独特的审美效果。     

Experimental study of kerosene–water two‐phase flow in a vertical pipe using hot‐film and dual optical probes

The local parameters for kerosene–water upward flow are measured in a vertical pipe of 77.8 mm inner diameter at 4200 mm from the inlet (L/D = 54) using hot‐film and dual optical probes. The effect of superficial water velocity and volumetric quality on radial distribution of two‐phase flow parameters is investigated. The results show the following: (i) the profiles of volume fraction and drop frequency are very similar, and increasing superficial water velocity at low volumetric qualities (<18.6%) change the profile from a convex shape with peak at the pipe centreline to uniform then to concave shape with peak near the wall; (ii) the profiles of drop cut chord change from a parabolic shape with peak at centreline for low superficial water velocities to a flat shape at higher superficial water velocity, and the area‐averaged drop diameter decreases with higher superficial water velocities for all volumetric qualities; (iii) velocity profiles for both phases have shapes similar to single phase flow, flatter at higher values of superficial water velocity and volumetric quality and centreline peaked at low superficial water velocities and volumetric qualities; (iv) the slip velocity decreases with radial distance having a peak at centreline and zero values near the wall; (v) introducing kerosene drops into single phase water flow results in a sharp increase in turbulent intensity, particularly at low water velocity, and the difference between the single phase and two‐phase flow turbulence intensities decreases with higher superficial water velocities and (vi) the results show that interfacial area concentration increased with higher volumetric quality and higher number of bubbles thereby increases the contact area between the two phases. © 2012 Canadian Society for Chemical Engineering     

CHARACTERISTICS OF GELATIN BIOFILMS IN RELATION TO DRYING PROCESS CONDITIONS NEAR MELTING

ABSTRACT

Biofilms are edible films formed from biopolymers. In the casting process technique, the biofilm is obtained by the drying of a colloidal solution in the final process stage The aim of this work was to analyse the drying process of gelatin based biofilms, in room frontier conditions. The biofilms were prepared initially by dissolving gelatin in water and adding sorbitol as plasticizer. The filmogenic solution was dried in an automatic drier under various drying conditions, for 1mm film: air temperature (T= 35, 40 and 45 °C), relative humidity (?= 60 and 75 %) and air velocity (v= 3m/s). The drying kinetics was measured for 15, 30 and 45 % sorbitol concentrations. Sorption isotherms at 25, 35 and 45 °C were determined for the 15% sorbitol concentration films by the static gravimetric method. The glass transition and the melting temperature for various moisture contents were determined with a Differential Scanning Calorimeter TA 2010. The results showed an unusual behaviour for temperature dependence: decreasing drying kinetics with increasing air temperature. Also separation of gelatin and sorbitol were seen when the temperature increased. This phenomenon occurs when the film temperature during the drying process gets close to the melting temperature of the film.     

叶黄素的提取及制备进展

叶黄素是一种新型的食用功能型色素。可以从天然植物中提取含有叶黄素的酯类皂化制得。本文通过参考国外有关文献报道及国内实际情况。分析和阐述了提取及制备叶黄素的发展情况及适宜国内的技术方向。     

食(药)用真菌多糖研究进展

综述了食(药)用真菌多糖的提取工艺、化学结构、生物活性以及食(药)用真菌多糖产品的开发现状,展望了 食(药)用真菌多糖的研发前景。     

增产柴油的有效途径--减一线直接生产柴油

介绍了一种增产柴油的有效途径———减一线直接生产柴油,即在减一线下增设一个分馏段。与减一线生产催化原料相比,其收率、操作条件、产品性质等只是减一线、减二线有所差别。工程设计的结果是换热网络、机泵、管线、仪表等都相同,增加的工程量及投资较少,经济效益十分显著。     

电致形状记忆复合材料研究进展

从宏观与微观两个角度对电致形状记忆复合材料的形状记忆过程及机理进行阐述,详述了基于不同导电填料如纳米颗粒、连续纤维、短切纤维以及复合填料的电致形状记忆复合材料研究现状及其物理共混、原位聚合、冷冻干燥等制备方法.从均匀的导体单元、导体与基体之间的接口黏结以及导电网络结构等3个方面分析了电致形状记忆复合材料的导电机理并从微...     

胭脂萝卜热风对流干燥过程的优化实验研究

本文对胭脂萝卜的热风干燥过程进行了优化实验研究,发现恒速干燥期的出现与否与干燥条件有关,考察了在相对湿度RH=8.2%下,风温风速对干燥后胭脂红获得的影响,得出了在本实验范围内干燥过程的最佳干燥条件,风温40～50℃。风速2.27m/s.这一结论可直接或间接用于工业生产。