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The phenomenon of urban heat island (UHI) and urban heat sink (UHS) has become an object of public concern in recent years with the rapid development of urbanization around the world. This paper focused on the spatial expansion and dynamic change of UHIs in Beijing, China from satellite images. The UHS intensity was indicated by mean plus standard deviation method. An index of spatial expansion intensity...
Drought is one of the major agricultural and meteorological disasters in China that occurs at high frequency, affects wide areas, and causes considerable agricultural loss. Research on the long-term spatiotemporal variability of arid climate and drought area in the context of global climate change is important and practically significant to the intention to cope with drought. Standardized precipitation...
To correctly record the process of lightning strike on power line and locate the fault site fast, serving to summarize their features and further take targeted protection measures against lightning strike, a distributed lightning current monitoring technology is proposed based on the simulation result. It's able to obtain necessary parameters of transient current, therefore make recognition of lightning...
A computer measurement and control system of test device for grain drying is designed by combining virtual instrument technology and computer measurement and control technology. Working done by hand or half hand system is solved by the automatic system. The hardware is designed with computer and ADAM module as its core, and the software is developed by Lab Windows/CVI. Digital incremental PID control...
In recent years, dynamic monitoring is widely used in the real estate market. Based on the dynamic monitoring system for urban property price, this paper focuses on the data collection and processing. Results of calculation show that the method is consistent with the actual situation, which means that it can provide reference for government decision-making.
This paper took walnut shell as experiment material, under the conditions that the endpoint temperatures were 450°C, 600°C and 750°C respectively. And the average heating rate was 150°C/h, the pyrolytic products of walnut shell indicated that, under a certain condition, with the increase of pyrolysis temperature, the walnut shell charcoal yield rate showed a downward trend; While the yield rate of...
In this paper, Eucalyptus grand is × E.urophylla was pretreated under 100°C steam and boiling water conditions respectively, and then the pretreatment and untreated specimens were dried in a kiln in which the temperature was 65°C and the pressure varied between 0.1MPa and 0.3M Paevery one hour. As a result, we got the conclusions that, both 100°C steam and boiling water pretreatment could reduce wood...
An extreme drought was occurred in Northern China in spring, 2009. MODIS data were used in this paper because of its' almost real time and large covered area. Because the subsurface of Northern China is bare soil or scarce vegetation covered area in spring, thermal inertia model which is suitable for this kink was used in this paper. Our results showed that most areas of the Henan province were in...
This paper probes into the design of the intelligent monitoring system based on S3C2440 ARM microprocessor. It focuses on the difficult points of developing the GUI applications based on Qt/Embedded and the Linux drivers for various types of sensors in the Lab Intelligent Monitoring System project, achieving the combination of Qt/Embedded and the linux system programming.
A kind of traffic lights controlling system by using PLC was designed, and the automatic control of the traffic lights was performed by software. In the system, the original relay wiring was replaced by the program, and the hardware and software resources of PLC were used reasonably. The normally running and emergency transport were introduced in detail, and that the emergencies from the east-west...
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