75results about How to "The principle of the method is clear" patented technology

The invention discloses a quantum identity authentication method and an application method of the quantum identity authentication method in a quantum key distribution process. Mutual identity authentication between two participants can be realized. The security is based on a quantum mechanics basic principle and is independent of the computation capability of an attacker. When the method is realized, technologies such as quantum storage, quantum entanglement and multiparticle measurement do not need to be used, so the scheme is has the characteristics of simpleness and easiness in realization. Compared with the prior art, the method has the positive effects that the method provided by the invention is clear in principle, a realization method is simple, the security is high, and an entanglement source and multiparticle measurement and quantum storage technologies do not need to be used, so the realization can be achieved under an existing technological condition. Related authentication schemes can be applied to establishment of a high-security quantum identity authentication system with the quantum computation resistance capability and also can be applied to a current mainstream quantum key distribution system, thereby realizing the high-security identity authentication between two communication parties.

The invention provides a photovoltaic array multi-peak maximum power point tracking method. According to the method, a power curve of an array is rapidly sampled based on the characteristics of a photovoltaic cell, power of each peak value point is estimated, the region where a global peak value is located is determined, single-peak MPPT is conducted in the region, and then global multi-peak MPPT is achieved. The method mainly includes the following steps of firstly, changing an output voltage of the array, and rapidly sampling the power curve of the array; secondly, analyzing the peak value condition of the array and estimating the size of peak values according to the characteristic parameters of a cell panel and sampling data, and determining the region where the global peak value is located; thirdly, conducting single-peak MPPT of a variable step size perturbation and observation method in the region; fourthly, repeating the method regularly or repeating the method when the actual power much deflects from the calculated maximum power. By means of the method, only a plurality of points on the power curve of the photovoltaic array are sampled based on the characteristic parameters of the photovoltaic cell panel, estimation values of all peak values can be obtained through simple operation, the region where the global peak value is located is rapidly positioned, and the method has the advantages of being clear in concept, simple in control structure, easy to implement in engineering and the like.