The role of religious groups in the political field has arised in Africa in 1990s and despite being less visible it is still active. In fact, this is the climax of a very old process in Africa. Religion always partici...The role of religious groups in the political field has arised in Africa in 1990s and despite being less visible it is still active. In fact, this is the climax of a very old process in Africa. Religion always participates in politics and vice versa. It is therefore not surprising that religious groups take into account political preoccupations in their communication processes. Sometimes they get involved in political debates, particularly when the questions reveal very important choices for the Nation, as it was the case in 1960s and 1990s. But mostly, they get involved in the social field which is, for them, the key to have one foot in political field. However, beyond these considerations, this paper intends to show how the use of media by religious institutions is closely related to their understanding of the relationship between the religion as an institution, and the society.展开更多
High-temperature heating surface such as superheater and reheater of large-sized utility boiler all experiences a relatively severe working conditions. The failure of boiler tubes will directly impact the safe and eco...High-temperature heating surface such as superheater and reheater of large-sized utility boiler all experiences a relatively severe working conditions. The failure of boiler tubes will directly impact the safe and economic operation of boiler. An on-line life monitoring model of high-temperature heating surface was set up according to the well-known L-M formula of the creep damages. The tube wall metal temperature and working stress was measured by on-line monitoring, and with this model, the real-time calculation of the life expenditure of the heating surface tube bundles were realized. Based on the technique the on-line life monitoring and management system of high-temperature heating surface was developed for a 300 MW utility boiler. An effective device was thus suggested for the implementation of the safe operation and the condition-based maintenance of utility boilers.展开更多
In this paper, an indoor environmental monitoring solution is proposed for the transformer sub- station system by using the ZigBee technology. It mainly analyzes the principle of sulfur hexafluoride sensor based on th...In this paper, an indoor environmental monitoring solution is proposed for the transformer sub- station system by using the ZigBee technology. It mainly analyzes the principle of sulfur hexafluoride sensor based on the acoustic method and puts forward a difference data processing method of single- channel and temperature compensation point at power consumption issues for sensor detection. The method not only reduces the sensor power consumption, but also ensures the accuracy and extends the lifetime of wireless sensor nodes effectively. This paper also analyzes the design of the base sta- tion mode, and demonstrates the running processes of routers and sensors. The feasibility of the pro- posed approach has been testified and proved.展开更多
文摘The role of religious groups in the political field has arised in Africa in 1990s and despite being less visible it is still active. In fact, this is the climax of a very old process in Africa. Religion always participates in politics and vice versa. It is therefore not surprising that religious groups take into account political preoccupations in their communication processes. Sometimes they get involved in political debates, particularly when the questions reveal very important choices for the Nation, as it was the case in 1960s and 1990s. But mostly, they get involved in the social field which is, for them, the key to have one foot in political field. However, beyond these considerations, this paper intends to show how the use of media by religious institutions is closely related to their understanding of the relationship between the religion as an institution, and the society.
文摘High-temperature heating surface such as superheater and reheater of large-sized utility boiler all experiences a relatively severe working conditions. The failure of boiler tubes will directly impact the safe and economic operation of boiler. An on-line life monitoring model of high-temperature heating surface was set up according to the well-known L-M formula of the creep damages. The tube wall metal temperature and working stress was measured by on-line monitoring, and with this model, the real-time calculation of the life expenditure of the heating surface tube bundles were realized. Based on the technique the on-line life monitoring and management system of high-temperature heating surface was developed for a 300 MW utility boiler. An effective device was thus suggested for the implementation of the safe operation and the condition-based maintenance of utility boilers.
基金Supported by the National Natural Science Foundation of China （ No. 10974044）, the Fundamental Research Funds for the Central Universities of Hohai University （No. 2009B31514） and the 2009 Jiangsu Province Graduate Education Reform and Practical Project （No. 2009-22）.
文摘In this paper, an indoor environmental monitoring solution is proposed for the transformer sub- station system by using the ZigBee technology. It mainly analyzes the principle of sulfur hexafluoride sensor based on the acoustic method and puts forward a difference data processing method of single- channel and temperature compensation point at power consumption issues for sensor detection. The method not only reduces the sensor power consumption, but also ensures the accuracy and extends the lifetime of wireless sensor nodes effectively. This paper also analyzes the design of the base sta- tion mode, and demonstrates the running processes of routers and sensors. The feasibility of the pro- posed approach has been testified and proved.
