34results about How to "Avoid mocking" patented technology

The invention discloses a pipeline water conveying system multi-point tiny leakage detection device and method. The method comprises the steps that transient drive signal generation equipment and a single-point pressure sensing unit are arranged at the tail end of a pipeline of a detected pipe net system to monitor tiny leakage points between the pipeline upstream position and the motivation position; the transient drive signal generation equipment is started, short-time drive signals are generated, and the single-point pressure sensing unit synchronously collects transient pressure signals; the transient pressure signals are analyzed, and the time and the reduced amplitude corresponding to pressure sudden change points of the first-phase pressure wave of the signals are analyzed; and the number of leakage points is identified according to the number of the pressure sudden change points of the first-phase pressure wave; and the position and leakage parameter of each leakage point are calculated according to the time and the reduced amplitude corresponding to each pressure sudden change point. The fact that the attenuation and distortion rule of the first pressure wave of transient water attack is different from that of single-hole leakage is utilized, multi-point and tiny leakage identification is conducted, simpleness and effectiveness are achieved, understanding is easy, the collected data volume is small, and reliability is high.

The invention provides a calculation method for the mid-span vertical displacement of a girder bridge changing with temperature, and belongs to the technical field of bridge structure analysis and monitoring. In this method, the node rotation angle of the main beam at each support is set as an unknown quantity, and the equation is established according to the moment balance condition of the node, and then the sequence is introduced to establish the quantitative relationship between the unknown quantities, and the relationship is brought into Equation, the analytical formula of the rotation angle of each node is solved, and then the analytical formula of the bending moment of each node is obtained by the superposition principle, and finally the analytical formula of the mid-span vertical displacement of the main beam of each span is obtained by the principle of virtual work. This method is aimed at equal-section beam bridges with equal side spans and arbitrary spans. The analytical formula given is an accurate solution, which is convenient to calculate and has strong versatility. It also reveals the behavior of beam bridges under temperature changes from the mechanism level, which can be used to guide The measuring point layout of the bridge monitoring system provides prior knowledge for the establishment of the temperature deformation benchmark model.

The present invention provides a method for customizing customer identifier. To resolve the problems in customizing the identifier in the electronic device by the manufacturer for its customers, such as high management cost, stock, and possibility of error, as well as the security problem in customizing the identifier by the customer itself, and the problem of counterfeiting by others, the method provided comprises generating an irreversible identifier from a seed data input by the customer using some one-way algorithm(s) and storing that identifier in the electronic device. For the manufacturer, both the management cost and the stock are reduced, and the error possibility of the product after leaving the factory as well. For the customer, the security of customizing the identifier is ensured, and its identifier cannot be counterfeited by other peers any more.