To evaluate and improve the real-time performance of Ethernet for plant automation（EPA） industrial Ethernet,the real-time performance of EPA periodic data transmission was theoretically and experimentally studied.By...To evaluate and improve the real-time performance of Ethernet for plant automation（EPA） industrial Ethernet,the real-time performance of EPA periodic data transmission was theoretically and experimentally studied.By analyzing information transmission regularity and EPA deterministic scheduling mechanism,periodic messages were categorized as different modes according to their entering-queue time.The scheduling characteristics and delivery time of each mode and their interacting relations were studied,during which the models of real-time performance of periodic information transmission in EPA system were established.On this basis,an experimental platform is developed to test the delivery time of periodic messages transmission in EPA system.According to the analysis and the experiment,the main factors that limit the real-time performance of EPA periodic data transmission and the improvement methods were proposed.展开更多
A reporter for China’s Foreign Tradehas learned from the Ministry of theCoal Industry that China will takethe following steps to develop its coal industryduring the ninth five-Year plan period. 1. To regulate the pol...A reporter for China’s Foreign Tradehas learned from the Ministry of theCoal Industry that China will takethe following steps to develop its coal industryduring the ninth five-Year plan period. 1. To regulate the policy for buildupthe coal industry and to make a good job ofthe comprehensive development of buildinga number of key coal production bases.展开更多
In the mid- and late 1990s,China’s nationaleconomy will maintain sustained,rapidand healthy development in terms of itsoverall capacity.This has provided idealopportunities for the development of China’smachine-buil...In the mid- and late 1990s,China’s nationaleconomy will maintain sustained,rapidand healthy development in terms of itsoverall capacity.This has provided idealopportunities for the development of China’smachine-building industry.These include:展开更多
Coal is China’s principal source of energy,accounting for about 75percent of primary energy.This pattern will remain unchanged fora long period of time from now on.Thanks to the efforts made duringthe Eighth Five-Yea...Coal is China’s principal source of energy,accounting for about 75percent of primary energy.This pattern will remain unchanged fora long period of time from now on.Thanks to the efforts made duringthe Eighth Five-Year Plan period,the general situation for the coalindustry is now good.展开更多
1.Products of the basic rawmaterials industry Products of the basic raw materialsindustry should improve product quality,make great efforts to realize diversification,serialization and specialization in productvariety...1.Products of the basic rawmaterials industry Products of the basic raw materialsindustry should improve product quality,make great efforts to realize diversification,serialization and specialization in productvariety,develop new varieties,and expandproduction so as to adapt to the demands forthe development of the food industry. Cereals:Develop high quality riceand wheat flour on a grade and class basis;develop special rice and wheat flour suitablefor the needs of processing various kinds offood;actively utilize coarse cereals such ascorn to open up various kinds of展开更多
The following was a keynote speech of the CAAM at an annual conference on the auto parts industry. 1.The first stage:to introduce the advanced technologies to localize car parts. In the mid 1980's,the auto industr...The following was a keynote speech of the CAAM at an annual conference on the auto parts industry. 1.The first stage:to introduce the advanced technologies to localize car parts. In the mid 1980's,the auto industry began introducing the car and展开更多
Ⅰ. Input Strengthened With nearly about 58.8 billion Rmb put into the fixed assets, the 8th Five-Year Plan period has witnessed the biggest investment increase ever seen in the history of China auto industry with muc...Ⅰ. Input Strengthened With nearly about 58.8 billion Rmb put into the fixed assets, the 8th Five-Year Plan period has witnessed the biggest investment increase ever seen in the history of China auto industry with much greater investment strength and concentration. While ensuring smooth implementation and completion of the key projects for heavy and light vehicles, which covered the 7th and 8th Five-Year Plan periods,展开更多
基金Supported by the National High Technology Research and Development Program of China (2006AA040301-4,2007AA041301-6)
文摘To evaluate and improve the real-time performance of Ethernet for plant automation（EPA） industrial Ethernet,the real-time performance of EPA periodic data transmission was theoretically and experimentally studied.By analyzing information transmission regularity and EPA deterministic scheduling mechanism,periodic messages were categorized as different modes according to their entering-queue time.The scheduling characteristics and delivery time of each mode and their interacting relations were studied,during which the models of real-time performance of periodic information transmission in EPA system were established.On this basis,an experimental platform is developed to test the delivery time of periodic messages transmission in EPA system.According to the analysis and the experiment,the main factors that limit the real-time performance of EPA periodic data transmission and the improvement methods were proposed.
文摘A reporter for China’s Foreign Tradehas learned from the Ministry of theCoal Industry that China will takethe following steps to develop its coal industryduring the ninth five-Year plan period. 1. To regulate the policy for buildupthe coal industry and to make a good job ofthe comprehensive development of buildinga number of key coal production bases.
文摘In the mid- and late 1990s,China’s nationaleconomy will maintain sustained,rapidand healthy development in terms of itsoverall capacity.This has provided idealopportunities for the development of China’smachine-building industry.These include:
文摘Coal is China’s principal source of energy,accounting for about 75percent of primary energy.This pattern will remain unchanged fora long period of time from now on.Thanks to the efforts made duringthe Eighth Five-Year Plan period,the general situation for the coalindustry is now good.
文摘1.Products of the basic rawmaterials industry Products of the basic raw materialsindustry should improve product quality,make great efforts to realize diversification,serialization and specialization in productvariety,develop new varieties,and expandproduction so as to adapt to the demands forthe development of the food industry. Cereals:Develop high quality riceand wheat flour on a grade and class basis;develop special rice and wheat flour suitablefor the needs of processing various kinds offood;actively utilize coarse cereals such ascorn to open up various kinds of
文摘The following was a keynote speech of the CAAM at an annual conference on the auto parts industry. 1.The first stage:to introduce the advanced technologies to localize car parts. In the mid 1980's,the auto industry began introducing the car and
文摘Ⅰ. Input Strengthened With nearly about 58.8 billion Rmb put into the fixed assets, the 8th Five-Year Plan period has witnessed the biggest investment increase ever seen in the history of China auto industry with much greater investment strength and concentration. While ensuring smooth implementation and completion of the key projects for heavy and light vehicles, which covered the 7th and 8th Five-Year Plan periods,
