Abstract: A method for preparing titanium metal by molten salt electrolysis is provided. The method includes constructing an electrochemical system, where an anode chamber is filled with an anode molten salt electrolyte that contains a titanium-containing raw material and inserted with an anode, a cathode chamber is filled with a cathode molten salt electrolyte and inserted with a cathode, and the anode molten salt electrolyte and the cathode molten salt electrolyte are not in contact with each other, but are connected by a liquid alloy at the bottom of the electrolytic cell; the system for electrolysis is powered on to obtain the titanium metal product at the cathode. The method of the present disclosure can treat low-quality titanium-containing materials, can be operated continuously, and can obtain relatively high-quality titanium.

Abstract: The present application relates to systems and computer-implemented methods for conducting a second price auction associated with an opportunity to realize an online advertisement. In some implementations, advertisers may be informed with the opportunity to realize the online advertisement, and may be provided with information associated with a user that may view the opportunity to realize the online advertisement; an individual reserve price may then be determined for each advertiser, based on the advertiser's individual bidding preference and the information associated with the user; and then the auction may be conducted to determine a winning bidder among candidate advertisers whose bidding price is higher than the individual reserve price associated therewith, using second price method.