Figure 2(a) depicts the frequency response of the UV irradiated LC/SP lamina, which confirm that the resistive, capacitive and inductive properties of the LC/SP lamina varied with the UV irradiation. The variations of the LC/SP lamina impedance ratio were more pronounced at low frequency which means that the LC/SP optoelectronic material is more suitable for lower frequency applications. The phase selleck chem inhibitor variation shown in Figure 2(b) indicates that there is an observed higher phase shift in the higher frequency region, i.e., the capacitive properties of LC/SP mixture changes with UV irradiation. The less pronounced phase varia
Water-level monitoring has been widely used to reduce the danger of flooding disasters, ensuring the safety of ship channels and monitoring the aquatic environment.
Field monitoring by people is still used, but sensor monitoring is being adopted by more monitoring stations. Currently some commercial product-based monitoring systems can be found in China, like the JWR-SJ Inhibitors,Modulators,Libraries Inhibitors,Modulators,Libraries water-level monitor from the Beijing Jiawer Co.  or the HG35-QSW water-level monitoring system of the Beijing Zhongxi Co. . Others are water-level monitoring systems based on wireless sensor networks such as the DATA86 water-level monitoring system of Tangshanpingsheng Co. . Similar monitoring products are also found overseas, such as TD-DIVER, an underground monitor by Holland Foreign Talent and YSI Level Scout, a water level monitor with large data storage capacity from Doppler U.S.
However, these on-the-spot automated devices still Inhibitors,Modulators,Libraries need people to download the data in the field later, therefore, researchers have sought to Inhibitors,Modulators,Libraries design and implement remote water environmental monitoring systems. Some are based on wireless sensor networks through the transmission of sound waves . Others are based on an ad hoc network of wireless nodes [5�C7], or adopt handheld data gathering and return data to the server using a GPRS network. Due to the interference from the transmission distances among the wireless nodes of the sensor network, such monitoring systems are more applicable to small-scale water Dacomitinib monitoring scenarios. Considering the vast territory and complicated hydrological environments of China, the applicability of the above methods is greatly limited.Let us consider, for instance, Poyanghu Lake, located in the Hengshan shoals of China, where seasonal flooding occurs.
A practical method is also needed to simultaneously monitor multiple ground Y-27632 msds water wells which distribute water. As a third example, many quake lakes were formed during the Wenchuan Earthquake in Sichuan Province of China on May 12th, 2008. The water-level of those quake lakes increased rapidly and threatened life and property, so there was an urgent need to monitor the water-levels quickly and accurately, but the appropriate Water Department still used field monitoring by people, which is very inefficient.