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To solve the problem of joint speed and strength of electricity controlled flexible clutch system (DMT) in the buses, the paper proposed a control method of pulse width modulation (PWM) based on the Freescale of 16-bit MC9S12XEP100 microcontroller. Designed the DMT control circuit and used the PID control of exciting current. The test results show that PWM control solved the rapid joint lead to overshoot,...
Land use change was the hottest topic in the research field of globe changing. The Coastal Area of the Pearl River Estuary where the zone has a typical feature of land use change and significant ecological effects was selected as a case. Applying the satellite images of Landsat-TM and the integrating techniques of GIS and RS, the present study analyzed the temporal and spatial processes and gravity...
Because of the feature of Ad Hoc network, the cooperating among mobile nodes is very important. The most common cooperating mechanism among mobile nodes is cooperative caching. That is, mobile nodes caching some important data or other resources, which can be used by other mobile nodes. Cooperative caching play a very important role in traditional networks for data access and information distribution...
Caching of frequently accessed data in mobile ad hoc networks is significant technique that can improve the date access availability and save the communication overhead. In this paper, we propose a novel scheme for cooperative cache placement in mobile ad hoc networks. In our scheme, cache place is developed to improve the utilization rate of caching data and the cache hit ratio. As a part of cooperative...
Nanohydroxyapatite reinforced poly(vinyl alcohol) gel (nano-HA/PVA gel) composites has been proposed as a promising biomaterial, especially used as an articular cartilage repair biomaterial. In this paper, nano-HA/PVA gel composites were prepared from mixing nano-HA particles modified by silicon coupling agent, with physiological saline solution (PSS) of PVA by freezing-thawing method. The effects...
An ontology-based framework of B2B integration is presented in this paper. The backbone of the framework is a central Integration Intermediary, which provides common ontology modules for registered companies to reuse. Due to the reusing, the developing of a company-specific ontology is simplified and the similarity between different ontologies is improved. The mapping between different companies’...
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