Abstract: The present disclosure provides a radio resource management system and method.

Abstract: The present disclosure provides a radio resource management system and method, a secondary system and a storage system. A radio resource management system includes circuitry configured to acquire interference information of respective locations managed by it, according to location information and operating parameters of secondary systems managed by it and an adjacent radio resource management system, and determine whether to accept a request from a new secondary system, within its management range, to access spectrum resources, and determine, if the request is accepted, the spectrum resources available for the new secondary system, based on the interference information and the location information of the new secondary system.

Abstract: The present disclosure provides a radio resource management system and method.

Abstract: The present disclosure provides a radio resource management system and method.

Abstract: A meeting server receives a request to join an online conference session from a first device at a first location. The first device is associated with a user account. The meeting server then determines at least one second location corresponding to at least one second device also associated with the user account. Responsive to a determination that the second location is within a predetermined distance of the first location, the meeting server transmits a command to mute the second device.

Abstract: The present disclosure provides a radio resource management system and method.

Abstract: The present disclosure provides a radio resource management system and method, a secondary system and a storage system.

Abstract: The present disclosure provides a radio resource management system and method.

Abstract: A meeting server receives a request to join an online conference session from a first device at a first location. The first device is associated with a user account. The meeting server then determines at least one second location corresponding to at least one second device also associated with the user account. Responsive to a determination that the second location is within a predetermined distance of the first location, the meeting server transmits a command to mute the second device.

Abstract: A method for determining chromium content in a tungsten matrix with singly or simultaneously added chromium and vanadium, characterized in that a test sample is subjected to melting with sodium peroxide and hot water leaching; meanwhile said sodium peroxide is also used as an oxidizing agent to oxidize all the chromium to high valences; the main body of tungsten is coordinated by ammonium hydrogen fluoride to prevent tungstic acid from precipitating; precipitation and turbidity are avoided throughout the analysis, titration can be carried out in a quite clear condition with accurate and reliable results.

Abstract: A method for determining vanadium content in a tungsten matrix with singly added vanadium or simultaneously added chromium and vanadium, characterized in that a test sample is subjected to alkaline melting with sodium peroxide and water leaching followed by dry filtering, the chromium and vanadium in the filtrate are firstly reduced to low valences by a reducing agent, i.e. hydroxylamine hydrochloride, then the filtrate is adjusted to an acidity of 4-6 M with nitric acid, the vanadium is oxidized in a cold state to a high valence by potassium permanganate, and the high-valent vanadium forms a ternary complex with tungstate and orthophosphate, the darkness of the color of the ternary complex is directly proportional to the vanadium content, thus the vanadium content is determined colorimetrically, and the interference of chromium is eliminated with the fact that the potassium permanganate in a cold state in the acidic condition for vanadium determination oxidizes the vanadium but not the chromium.

Abstract: A method for determining chromium content in a tungsten matrix with singly or simultaneously added chromium and vanadium, characterized in that a test sample is subjected to melting with sodium peroxide and hot water leaching; meanwhile said sodium peroxide is also used as an oxidizing agent to oxidize all the chromium to high valences; the main body of tungsten is coordinated by ammonium hydrogen fluoride to prevent tungstic acid from precipitating; precipitation and turbidity are avoided throughout the analysis, titration can be carried out in a quite clear condition with accurate and reliable results.