基于机器视觉的口服液智能灯检机的设计

针对目前国内口服液灯检存在检测结果不稳定、检测范围局限性大、检测效率低下的现状。本文介绍了一种能对口服液进行在线检测的智能灯检机的设计方案。口服液由传送链送到摄像区域,利用红外传感器的触发脉冲控制图像采集卡动态采集口服液图像。图像处理和模式识别结果用于控制电磁阀的开启,利用气流将不合格口服液剔除。     

敏感的旋转圆球

让一个圆球旋转起来,它就会带动周围的空气一起旋转。我们当然看不见圆球附近的空气旋转,但是我们可以感受到圆球附近的气流。若把圆球放在水中旋转,就可以看到水被圆球带动而旋转起来。不论圆球在空气中还是在水中,当圆球的旋转速度恒定不变时,空气或水的     

太阳耳环

日珥是日面边缘温度较低的气体活动产生的一种现象,由细长条状的气流组成,受太阳磁力的控制。当日珥出现时,玫瑰红色的舌状气体犹如烈火升腾,异常壮观。     

打鼾的危害及预防与治疗

<正>人的一生大约有三分之一的时间是在睡眠中度过的。睡眠中,机体处于低代谢状态,使体力和精力得以恢复。鼾声是人们在睡眠时候鼻呼吸的气流吹动咽部的软腭和悬雍垂使之振动所发出的声音。鼾声的大小是由气流所受的阻力和呼吸力量的强弱而决定的。轻度的鼾声一般不影响睡眠,也不影响正常的功能。在健康人中如身体疲劳,睡眠深沉,体位不适,酒后或内服催眠药,可出现鼾声。这种不是由疾病引起的鼾声,叫生理性鼾声,不会影响健康。     

浅谈声乐教学“巧”用气的训练

歌唱时的声音前足后竭的关键是没有学会巧用气息，引导学生用气的关键是一个“巧”字。包括气的吸入、冲击、控制等。     

蝴蝶效应

自然界有这样奇妙的现象:据说,南半球一只蝴蝶偶尔扇动翅膀所带起来的微弱气流,几星期后竟变成了席卷美国得克萨斯州的一场龙卷风!于     

Study on Predrying by Spin Flash Dryer for Granulation

Spin flash dryer has the advantages of both fluidized bed dryer and pneumatic dryer. It has predominance in dealing with thermal sensitive materials. In this paper, the distribution of the air velocity in the spin flash dryer is discussed,which indicates that the rotating air in the dryer chamber can be divided into two areas,potential flow area and plane swirl area. Experiments show that air tangent velocity effects the process of granulation most remarkably. The radial distribution and moisture content of the particles have their intrinsic rules along either the diameter or height of the drying chamber. Besides, the operating parameters of predrying on bleaching powder are optimized. To meet the strict standard of the wet-pressing granulator on the moisture content of the feeder,a narrow lap is made at proper height in the wall of the drying chamber,where a chute and a rotating valve are installed in order to predry the filter cake and remove a part of water. Then the material is fed into the wet-pressing granulator.     

Electrical properties of carbon nanotubes in flowing vapor

1 Introduction a Among the numerous sensitive materials, carbon nanotubes (CNTs), both single and multiwalled, have been the focus of many studies recently [1,2]. In addition to high gas detection capability, it is established that CNT-based sensors opera…     

CFD Analysis of Gas Distributor in Packed Column——Prediction of Gas Flow and Effect of Tower Intemals Geometry Structure

Computational fluid dynamics (CFD) simulations were carried out on the gas flow patterns of twintangential annular deflector gas distributor in the absence of liquid flow in a packed column (6.4 m in diameter) , and the gas flow field in the column was presented close to reality on the whole. Furthermore, after amelioration of this gas distributor frame, turbulence energy and turbulence energy dissipation rate were both decreased greatly. Simulation results showed that the flow pattern and the distribution of gas flow were strongly affected by the column bottom frame ; the proper column bottom frame could decrease the flow pressure drop greatly. Multifold factors, such as the column bottom geometry structure and distributor structure which affects the distribution capacity, must be considered.     

地震过后为什么会下雨?

汶川发生大地震后,当天晚上该地区又下起了大雨,给抗震救灾工作带来困难;我记得去年云南发生大地震后也下了大雨.过去邢台大地震、唐山大地震后也有同样的遭遇.为什么地震过后要下雨呢?现就此问题作如下探讨.