The launch ceremony of "Nuclear Materials Science …

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On October 28th, more than 60 experts and scholars in the materials science and engineering and nuclear industries gathered at Chemical Industry Press to participate in the launch of the series of books on "Nuclear Materials Science and Engineering." This series of books was initiated an ...

Digital AC Servo Control Strategy and Design

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Modern AC servo system requirements for control are: fast response, high precision, and low torque ripple. The realization of high-performance control of AC motor instantaneous torque is a key factor to meet these requirements. Therefore, the control strategies of modern ...

Four major pressure under the method of calcium carbide…

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In recent years, calcium carbide process PVC has achieved considerable development under the strong growth of downstream demand and the rise in international oil prices that has caused ethylene prices to remain high. In the first half of this year, the net profit of domestic major PVC companies suc ...

New clean epoxy resin flame retardant - DOPO products c…

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The research and development of organophosphorus compounds is rapidly developing from a chain structure to a ring structure, in which the phosphonium compound, DOPO and its derivatives, have a unique molecular structure (biphenyl ring and phenanthrene ring structure coexist), and I ...

Compound fertilizer companies were blocked before the t…

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At the onset of the winter, domestic compound fertilizer companies are complaining that the pressure of raw material price increases is too great, and sometimes goods are not available (production raw materials). Imports of potash fertilizers will soon begin, and international oil prices will rise ...

Hubei polluting enterprises will be shut down year by y…

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Li Bing, director of Hubei Provincial Environmental Protection Bureau, revealed in recent days that Hubei's environmental protection work in 2008 will focus on combating pollution reduction. The completion of pollution reduction missions will be integrated into the comprehensive evaluation syste ...

The sales of heavy trucks have obviously decreased

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Starting in March of this year, a new round of “blowout” growth has engulfed the heavy truck industry, and the heavy truck market has sold more than 50,000 units in a single month for three consecutive months. In April, the heavy truck sales reached the highest single month in history. ...