Abstract: The present disclosure provides a data prefetching method, a data prefetching apparatus, an electronic device and a computer-readable storage medium. The data prefetching method includes: acquiring a query prefix inputted by a user; analyzing the query prefix in accordance with a pre-trained linguistic model to acquire a perplexity of the query prefix; judging whether the perplexity is smaller than a predetermined threshold; and transmitting a prefetching request in accordance with the query prefix when the perplexity is smaller than the predetermined threshold.

Abstract: An electric vehicle control system and a control method, an electric vehicle power-on method, an electric vehicle power-off method, and an electric vehicle charging method are disclosed in this application. The control system includes a domain control unit controlling an electric vehicle, a current sampling unit sampling the current of a power battery and a motor of the electric vehicle and sending sampling signals to the domain control unit, and electrical device, driven by the power battery, sampling the current flowing through it and sending the sampling signals to the domain control unit. The domain control unit, according to the sampling signals sent by the electrical device and the current sampling unit, manages the power battery and controls a motor driver module and the electrical device. The structure of the control system and the control policy are simplified and the power-on and power-off time is shortened.

Abstract: An electric vehicle control system and a control method, an electric vehicle power-on method, an electric vehicle power-off method, and an electric vehicle charging method are disclosed in this application. The control system includes a domain, control unit controlling an electric vehicle, a current sampling unit sampling the current of a power battery and a motor of the electric vehicle and sending sampling signals to the domain control unit, and electrical device, driven by the power battery, sampling the current flowing through it and sending the sampling signals to the domain control unit. The domain control unit, according to the sampling signals sent by the electrical device and the current sampling unit, manages the power battery and controls a motor driver module and the electrical device. The structure of the control system and the control policy are simplified and the power-on and power-off time is shortened.

Abstract: The present disclosure provides a data search method, and relates to the field of computer technology. The method includes determining semantic-understanding information corresponding to a received search term by subjecting the search term to semantic understanding; analyzing the semantic-understanding information to obtain timeliness requirement information of the search term; determining an acquisition mode of resource result corresponding to the search term based on the timeliness requirement information of the search term; and obtaining the resource result corresponding to the search term by using the determined acquisition mode. The present disclosure further provides a data search apparatus, a system, a device, and a computer readable storage medium.

Abstract: The present disclosure provides a data search method, and relates to the field of computer technology. The method includes determining semantic-understanding information corresponding to a received search term by subjecting the search term to semantic understanding; analyzing the semantic-understanding information to obtain timeliness requirement information of the search term; determining an acquisition mode of resource result corresponding to the search term based on the timeliness requirement information of the search term; and obtaining the resource result corresponding to the search term by using the determined acquisition mode. The present disclosure further provides a data search apparatus, a system, a device, and a computer readable storage medium.

Abstract: The present disclosure provides a data prefetching method, a data prefetching apparatus, an electronic device and a computer-readable storage medium. The data prefetching method includes: acquiring a query prefix inputted by a user; analyzing the query prefix in accordance with a pre-trained linguistic model to acquire a perplexity of the query prefix; judging whether the perplexity is smaller than a predetermined threshold; and transmitting a prefetching request in accordance with the query prefix when the perplexity is smaller than the predetermined threshold.

Abstract: The invention discloses CA-4 antitumour drug, their synthetic methods and applications. The CA-4 antitumour drug are obtained by introducing an alkoxy group or a fluorine-containing alkoxy group at the 4? position of the natural product Combretastatin and modified with a functional chemical group at its 3? position. The CA-4 derivated anti-tumor drugs of the invention have inhibitory ability on two targets related to tubulin and arylsulfatase, and can be used for anti-tumor treatment.