7 results about "Wide area" patented technology

The invention relates to a separated type optical testing device based on a commonly-used mobile intelligent terminal. The separated type optical testing device comprises an operation end based on the commonly-used mobile intelligent terminal and at least one testing front end. The testing front end comprises a data acquiring unit, a data processing and controlling unit and a short-distance communication unit which are connected in sequence. The data acquiring unit is used for obtaining data of a front end circuit. The data processing and controlling unit is used for processing the obtained data and calculating and controlling the obtained data. The short-distance communication unit is used for being communicated with the operation end. The operation end based on the mobile intelligent terminal comprises a man-machine interface unit for achieving a user interface, a main control unit for finishing device management and required numerical calculation processing, a short-distance communication unit for achieving an application communication protocol between the short-distance communication unit and the testing front end, and a wide-area communication unit for achieving a long-distance application communication protocol. The separated type optical testing device can form a man-machine interface with good experience and can form testing records in real time.

Cognitive deficits involving attention, sequential processing, reading, speed of processing, and navigation may be diagnosed and remediated in a subject by respectively measuring and improving contrast sensitivity for motion discrimination of the subject. A background may be displayed with a contrast and temporal frequency and either single, or multiple, higher spatial frequencies that may repeat over a wider area than the individual frequency components. A test window may be superimposed over the background, and includes a test pattern with a contrast and a spatial frequency and a temporal frequency The subject may provide a signal indicative of the direction the subject believes the test pattern moved. In response to this signal, the contrast of the test pattern, the spatial frequency of the background, the spatial frequency of the test pattern, or the temporal frequency may be modified, either by increasing or decreasing its respective value.

Provided is a method for producing a functional polyester fiber that can be utilized in a broad range of areas, including lifestyle materials and industrial materials. By adding a reactive group to a polyester fiber and binding a crosslinking agent to the reactive group, functional agents can easily be bound to the polyester fiber. In addition, a polyester fiber with outstanding functional durability can be achieved without destroying the stability of the polyester fiber. The method for producing the functional polyester fiber involves: adding a hydroxyl group and/or a carboxyl group and/or an amino group to the polyester fiber as a reactive group; adding a crosslinking agent to the polyester fiber, to which the reactive group was added, that will react with the reaction group; and adding a functional agent that reacts with the crosslinking agent.

The invention discloses a power grid circuit wide-area current protection method. The method includes the first step of synchronously measuring the voltage phasor and current phasor of each transformer substation of a power grid through an existing wide-area measuring system of the power grid so as to obtain power grid synchronous data; the second step of calculating an admittance variation matrix through a wide-area backup protection system when single-circuit trip of the power grid occurs, and further calculating a voltage variation matrix of each transformer substation and the current variation of each circuit after the single-circuit trip of the power grid occurs; the third step of establishing a current protection criterion according to the calculated circuit current variation and the circuit current variation measured through the existing wide-area measuring system. According to the power grid circuit wide-area current protection method, the function of protecting the power grid circuit wide-area current after the single-circuit trip occurs is achieved through the existing wide-area measuring system of the power grid; when the topological structure of the power grid changes after the single-circuit trip of the power grid occurs, the variation of current which flows through each circuit after the single-circuit trip of the power grid occurs can be directly calculated without modifying the power grid admittance matrix, and the whole calculation process can be completed within 200 microseconds.