绝缘表面和气体导电与湿度的关系

湿度对绝缘体表面电导和气体电导有一定的影响，但通常在湿度传感器的研究中忽略了气体电导的贡献。本文通过特殊设计装置来区分表面电导和气体电导，并分别从实验和理论上进行了定性的研究。     

迷向映照和伪Veronese流形

本文讨论了伪Riemann流形之间的迷向映照。作为从伪Riemann球面到伪Riemann球面的极值浸入的新例子,本文从伪Riemann球面之间的迷向调和映照中确定了所有的伪Veronese流形。最后,利用某些几何量来刻划双曲类空的Veronese流形。     

湿度传感器世界市场价格稳定

过去几年中,湿度传感器价格基本上是稳定的。由于原材料成本继续平稳、市场需求强劲、技术创新不多,因此亚洲和美国的制造商排除了今年湿度传感器价格上涨的可能性。     

FFC-1离子交换纤维对酸碱有害气体吸附性能的研究

系统考察了不同直径及反离子形式的FFC-1聚羧酸离子交换纤维对酸碱有害气体的穿透吸附,各种温、湿度条件下的吸水率,以及作为有害气体吸附滤除材料的重复使用与再生性能。研究表明:FFC-1纤维直径的减小有利于提高对有害气体的动态吸附容量。在体系温度、相对湿度分别为15℃、50%时,以3D腈纶为起始原料的钠型FFC-1离子交换纤维的吸水率≥350mg/g.纤维;对SO2的穿透吸附容量可达200mg/g.纤维。FFC-1离子交换纤维具有良好的重复使用与再生能力,经20次再生循环使用后,纤维交换容量未见明显变化。     

基于单片机的机房温湿度监控系统

本文阐述了基于STM32F103c8t6的机房温湿度监控系统的设计原理。该系统主要以STM32F103c8t6单片机为核心,以DHT11温湿度传感器作为采集系统,把实时温度、湿度数据显示在OLED屏幕上。如果温湿度数值超过设置的阈值,会通过无线通讯模块GSM800C发送信息给用户,从而对交警中心机房内的环境实行实时监控,使环境内的温湿度得到有效监控。     

Experimental and Theoretical Study of the Effect of Moisture on Methane Adsorption and Desorption by Activated Carbon at 273.5 K

Adsorption and desorption of methane by activated carbon (AC) at constant temperature and at various pressures were investigated. The effect of moisture was also studied. A volumetric method was used, up to 40 bar, at a temperature of 273.5 K. Results of a dry AC sample were compared with those obtained from a moist sample and two different ACs with different physical and surface properties were used. As expected, the results showed that the existence of moisture, trapped in the AC pores, could lead to a decrease in the amount of methane adsorbed and a decrease in the amount of methane delivered during desorption. To model the experimental results, a large variety of adsorption isotherms were used. The regressed parameters for the adsorption isotherms were obtained using the experimental data generated in the present study. The accuracy of the results obtained from the different adsorption isotherms was favorably compared.     

吸附式增湿饱和器

本文介绍了美国GE公司DPG—300分流湿度发生器的工作原理。针对该发生器的增湿饱和度不够的缺陷,提出了改进措施。改进的方法是通过在增湿饱和器内放置能够吸附水的吸附材料而实现的。     

关于Udo Simon猜测的注记

设ψ:S2→Sn为线性满的极小浸入,Gauss曲率K满足1/10≤K≤1/6。若K不是常数,则n=6,且ψ的准线φ0至少有2个不同的分歧点。作为它的推论,如果1/7相似文献