Methods, systems, and computer program products for combining conjoint analysis with customer relationship managementsoftware, search enginesoftware, and auction software are disclosed. According to one method, conjoint analysis is used to facilitate user interaction with a search engine. According to the method, search keywords are received as a user and treated as attributes by a conjoint analysis application. The conjoint analysis application presents the user with paired trade-off questions regarding the search keywords. Conjoint analysis is performed based on user responses to the questions. Based on the user's responses to the questions, relative importance weightings are computed for keywords. The keywords and the relative importance weightings are input to a search engine. The search is performed using the keywords. Results to be output to the user are selected based on occurrences of the keywords in the search results and the relative importance weightings.
The invention discloses a precious metalultramicroelectrode and a preparation method thereof. The preparation method includes drawing one end of a glass capillary into a sharp end with an internal diameter of 20-100 micrometers in a stretching mode; dipping silver conductive adhesive at one end of a copper wire and bonding the end to one end of a precious metal wire to enable the silver conductive adhesive to be cured at a high temperature; penetrating the bonded copper wire and the precious metal wire through the glass capillary after drawing, enabling the end portion of the precious metal wire far from the copper wire to stretch out 1-1.5cm from the sharp end of the glass capillary; and obtaining the precious metalultramicroelectrode after fusion or sealing, washing, etching and insulating treatment to the sharp end of the glass capillary containing the precious metal wire. The precious metal ultramicroelectrode and the preparation method thereof have the advantages of simple preparation process, small preparation difficulty, and controllable size and shape.