Compilation of safety technical measures for coal mine …

Production excavation Safety measures for working surface grinding I. Overview of the working surface (with a schematic diagram of the working surface) Second, the construction method Tilt length 2. According to the actual situation, the adjustment ratio Third, safety technical measures 1. Ch ...

Vapor deposition technology and its classification

Chemical vapor deposition (CVD) is the most widely used in the semiconductor industry for the deposition of multiple materials, including a wide range of insulating material, metallic material and the majority of metal alloy material. In theory, it is very simple: two or more gaseous raw materials a ...

Apple wants to develop "speaker recognition" …

According to foreign media reports, Apple published the latest article in its machine learning journal "Apple Machine Learning Journal". It mainly describes the user-friendly process when users activate "嘿Siri" function on iOS devices, and introduces speaker recognition re ...

About the purchase of artificial climate box

With the continuous deepening of life science research, the demand for artificial climate chambers is increasing. This type of professional control equipment that can accurately simulate different environmental conditions has been widely used in many fields such as seed germination and s ...

Interpretation of automotive stocks than liberalization…

On April 17, China’s auto industry shares were officially demarcated on the time limit. It is understood that the auto industry will limit the number of shares to be restricted by category. In 2018, the foreign share ratio of special vehicles and new energy vehicles will be abolished; The r ...

How much of a new energy vehicle's sole proprietors…

“It is not yet possible to determine the specific details of policy liberalization. However, once fully liberalized, foreign-funded enterprises can arbitrarily establish corresponding models in China through various forms, including sole proprietorship.” Zhang Zhiyong, a senior analyst ...

Relay Protection [Technology Interview] Frequently Aske…

1. What is the task of relay protection in the power system? When a protected power system component fails, the relay protection device of the component should promptly and accurately issue a trip command to the circuit breaker that has been removed from the faulty component, so that the fault co ...