废气生物处理装置自动监控系统的设计

生物法处理是国内较新的一种高效工业有机废气污染治理技术,而具有自动监控功能的智能化处理装置尚处于研制开发阶段。介绍了一种基于生物法处理技术的废气处理装置的基本结构,提出了基于PLC及网络通信技术实现其自动监控系统的方案,详细介绍了该监控系统硬件和软件实现方法。试验结果表明,该系统不仅可实现废气处理过程中各参量测定,而且可按照设定的不同工艺对装置进行自动调节控制。具有功能完善、运行稳定可靠、性价比高等特点。

P3级生物安全实验室送、排风净化系统的环保型设计

三、四级生物安全实验室建设和运行的核心是净化系统。该文简要介绍了P3级生物安全实验室送排风系统设计中，根据实验环境状况以环保型理念实现实验室安全可靠性的工作研究。

吸嘴结构参数与吸尘性能间的参数关系挖掘

吸嘴作为清扫车气力输送系统的关键部件,其内流场性能直接决定了吸尘性能,而内流场性能又取决于吸嘴结构,各结构参数的影响存在相互影响.为均衡吸嘴结构参数对吸尘性能的影响,结合实体模型和计算流体动力学对某吸扫式清扫车气力输送系统进行数值仿真分析,借此挖掘吸嘴结构参数与性能指标间的参数关系,以吸尘性能各评价指标同时达到期望范围为目标,对吸嘴结构进行优化设计.结果表明,吸嘴各结构参数对吸尘性能各评价指标的影响相互制约、相互矛盾,获得的最优吸嘴结构参数组合为:吸嘴宽度为100mm,吸管间距为1 238mm,吸尘拓展区高度为45mm,吸嘴肩部夹角为26°.

以高温回流稳定煤粉燃烧火焰的简化分析模型

基于炉膛中煤粉空气射流的流场特征，提出了以高温回流区内煤粉挥发分燃烧释热来加热和点燃煤粉气流从而实现火焰稳定的集总分析模型，并以回流区温度的变化率为判据找到了稳定煤粉气流的回流区特征尺度，据此就能近似判定各种煤粉气流流场的火焰稳定性能。

Study of the Aerodynamic Process and Its Impact on Cotton Transportation Process through the Cotton Pipeline

The article provides a theoretical analysis of the velocity distribution and distribution in the cross section of the pipe during the transportation of cotton. It studied the factors that move air and transport material in a pneumatic pipeline, developed a mathematical model and built graphs. The effect of pressure on the ease of construction of pipes for air transportation of raw cotton and the speed distribution in the process of transporting cotton, as well as the factors that cause pressure loss in the shells of pipes were studied. So, if the expansion after the air pipe is expanded (5), we will introduce K1 = 0 and the beating coefficient . If the current narrows before burdening, then we enter K1 = 1 and the input soften rate from the formula . The air flow is moving upwards below the slope and the longer the pipe is the air flow is so significant (strong). The flow of air is divided into laminar and turbulent streams according to leakage. The procedure for transportation of raw cotton using air will move the turbulent the sidelines, interacts with the layers. If the turbulent passes in a well-round smooth passenger-pipes, the number of critical Reynolds can be delivered to 200,000. The process of transporting cotton in pnevmotransport is far from the laminary regime in far away and stronger mode.

微软奔无线

目前,微软公司正在设计一种名叫Airstream的新型软件平台,它将帮助企业构建使用无线信号的新型无线服务。这套软件工具包括用于手持电脑和智能电话这类设备的客户端软件,以及用于无线应用程序的服务器软件工具。它还包括与无线应用捆绑在一起的集成语音识别技术。微软研制Airstream的目的之一是保证任何Windows或Web应用程序都能够在一大批不同的设备上运行。

露营概念车福特Airstream

这是福特联手新伙伴Airstream做的一次让人心惊胆战的在巡航领域的尝试!装配该车的燃料电池的重量及制造成本与上一代产品相比均有所减少，即便是在温度很低的情况下，该车的燃料电池系统仍然运行的十分良好。

基于灰色系统理论的煤油超声速雾化的仿真优化

为了提高煤油在超声速气流中喷射的雾化性能,利用Fluent软件模拟其雾化情况,以穿透深度、横向扩散范围、索特尔平均粒径(SMD)等雾化质量的评价指标为目标函数,以喷射角度、喷嘴直径、喷射速度等作为独立的喷射参数,进行多目标正交优化。应用灰色系统理论优化喷射参数组合,并以其再进行数值模拟验证,模拟结果表明雾化质量比优化前明显提高。研究表明,以正交试验法和灰色关联分析法应用于煤油超声速雾化参数优化的方法是有效的。

One-dimensional titania nanotubes annealed at various temperatures for the photocatalytic degradation of low concentration gaseous pollutants

In this study, one-dimensional titania nanotubes （TNTs） were synthesized using a combined process of chemical and hydrothermal treatments, and their activities for the photocatalytic reactions of selected gaseous pollutants at sub-ppm levels were determined. Additionally, the properties of the TNTs were examined using selected spectroscopic methods. The annealed TNTs showed higher photocatalytic activities for the four target compounds than did the unannealed TNTs. For all the target compounds except benzene, the effect of the annealing temperature on the degradation efficiency was difficult to determine because all degradation efficiencies were very high. However, for benzene, which decomposed with a low efficiency, the degradation activities of the TNTs increased as the treatment temperature was increased from 250 to 300 ℃, while they decreased slightly when the temperature was increased from 300 to 400 ℃. These findings confirm the presence of an optimal annealing temperature for the synthesis of TNTs. Moreover, the average degradation extents for benzene, toluene, ethylbenzene, and o-xylene decreased from 92%, 96%, 99%, and 98% to 77%, 86%, 92%, and 94%, respectively, as the airstream flow rate increased within the range of 1-4L/min. The average degradation extents decreased from 12%, 75%, 87%, and 88% to 3%, 29%, 46%, and 51%, respectively, as the input concentration increased from 0.4 to 1.9 ppm. Overall, these findings suggest that one-dimensional TNTs can be effectively utilized for the degradation of gaseous pollutants under optimal operational conditions.