3results about How to "Expand the solution space" patented technology

The application belongs to the technical field of integrated circuit hardware security, and discloses a dynamic key encryption device and method based on a key check code, which comprises a dynamic key generation module, a trigger signal generation module and a dynamic key check module, an initial key signal is input into the dynamic key generation module, the dynamic key generation module outputs a dynamic key signal to the dynamic key check module, the dynamic key check module acquires an original circuit signal from an original circuit and outputs an encrypted circuit signal to the original circuit, the trigger signal generation module acquires an original circuit state machine signal from the original circuit and outputs a trigger signal to the dynamic key generation module and the dynamic key check module; the application constrains and expands the bit width of an original key by using a check bit, avoids the situation that a solver directly solves one code in a cyclic code and causes the key to be directly cracked, increases the solving space of the solver, and delays the cracking speed of reverse engineering.

The invention provides an order allocation method and device, a storage medium and a program product, and relates to the technical field of computers. The method comprises the following steps: obtaining order information of a to-be-allocated order, order back information of a plurality of delivery resources and delivery resource positions of the plurality of delivery resources; for each delivery resource, constructing a position relation matrix corresponding to each delivery resource based on the order information, the order information and the delivery resource position; based on the position relation matrix corresponding to each distribution resource, carrying out multiple times of cyclic taking and sending sequence solving to obtain a target taking and sending sequence corresponding to each distribution resource; and determining a target delivery resource from the plurality of delivery resources based on the target delivery sequence corresponding to the plurality of delivery resources, and allocating the to-be-allocated order to the target delivery resource. According to the method, the solution space can be effectively improved to effectively screen the local optimal solution, so that the to-be-allocated order is allocated to a more appropriate target delivery resource.

The embodiment of the invention provides a control method of a dual-active-bridge micro inverter and related equipment, and belongs to the technical field of power electronic converter control. The method comprises the following steps: firstly, establishing a unilateral asymmetric duty ratio modulation model based on three variables of an external phase shift angle D1, an internal phase shift angle D2 and switching frequency, and deducing transmission power and soft switching constraint conditions; secondly, the switching frequency is dynamically adjusted according to the voltage phase of the power grid, and high frequency is adopted near voltage zero crossing to expand the soft switching range; thirdly, in a rated frequency interval of main power transmission, taking minimization of current stress as a target, adopting an improved self-adaptive particle swarm algorithm to carry out on-line optimization on D2 under the soft switching constraint, and calculating a corresponding D1; and finally, combining the optimized frequency with the phase shift angle feed-forward quantity and the feedback compensation quantity to generate a PWM driving signal. According to the invention, the large-range soft switching of a whole power frequency period is realized, the conduction loss is obviously reduced, and the system efficiency and reliability are improved.