Abstract: A robot for pond desilting is provided, which includes a frame, a lead screw sliding table, and a suction pipe. An end of the frame is provided with a pressure-resistant cabin. A lead screw base is disposed on the lead screw sliding table. A rotary lead screw is disposed on the lead screw sliding table. The lead screw base is disposed on the rotary lead screw. Waterproof motors are disposed above the lead screw base, a pump body is disposed in the frame, and the suction pipe is disposed at an end of the pump body. When the robot is placed at the bottom of the pond, the motor inside the pressure-resistant cabin drives the power wheels to rotate, the power wheels drive the tracks to rotate around the power wheels, bearing wheels, and tension wheels, thereby driving the frame to move.

Abstract: The present disclosure relates to a hybrid solar receiver that generates electricity and heat simultaneously. The solar receiver comprises photovoltaic cells for converting concentrated light on the cells into electricity. The receiver also includes a heat pipe having a heat discharge area that serves as an evaporator for discharging heat accumulated on the photovoltaic cells to a dissipation area. A dual-function interface layer is positioned between the photovoltaic cells and the heat pipe. The interface layer electrically insulates the photovoltaic cells from the heat pipe and instantaneously transfer the heat accumulated on photovoltaic cells to liquid coolant in the heat pipe. A surface of the photovoltaic cells is coated with an encapsulation layer. A transparent plate is deposited on the encapsulation layer.

Abstract: The object of the hybrid solar receiver according to the invention is to generate electricity and heat simultaneously in an optimum manner. It comprises photovoltaic cells (2) for converting the sun's rays concentrated on the cells into electricity and a heat pipe (3) in order to discharge the heat accumulated on photovoltaic cells (2) via a liquid coolant. Heat pipe (3) has a heat discharge area (3a) that serves as an evaporator for discharging the heat accumulated on the photovoltaic cells (2) and a dissipation area (3c) for dissipating the heat that it absorbs, the entire rear face (S2) of photovoltaic cells (2) being placed on and in contact with heat discharge area (3a) of heat pipe (3) via a dual-function interface layer (4) that electrically insulates the photovoltaic cells (2) from the heat pipe (3) in order to instantaneously transfer the heat accumulated on photovoltaic cells (2) to the liquid coolant in the heat pipe.

Abstract: The present invention discloses a PLL, a lock detector thereof and a lock detection method. The lock detector includes: a first detecting unit, adapted to compare a counting value of a reference clock signal with a counting value of a feedback clock signal every first interval and output a valid first prelock signal when the counting value of the reference clock signal is equal to the counting value of the feedback clock signal; a second detecting unit, adapted to output a valid second prelock signal when the counting value of the reference clock signal is equal to the counting value of the feedback clock signal during a second interval which is at least two times higher than the first interval; a third detecting unit, adapted to output a valid lock signal if the first prelock signal output from the first detecting unit every first interval is valid and the second prelock signal output from the second detecting unit is valid during the second interval.

Abstract: The present invention discloses a PLL, a lock detector thereof and a lock detection method. The lock detector includes: a first detecting unit, adapted to compare a counting value of a reference clock signal with a counting value of a feedback clock signal every first interval and output a valid first prelock signal when the counting value of the reference clock signal is equal to the counting value of the feedback clock signal; a second detecting unit, adapted to output a valid second prelock signal when the counting value of the reference clock signal is equal to the counting value of the feedback clock signal during a second interval which is at least two times higher than the first interval; a third detecting unit, adapted to output a valid lock signal if the first prelock signal output from the first detecting unit every first interval is valid and the second prelock signal output from the second detecting unit is valid during the second interval.

Abstract: A collector includes a convergent lens (2) having a focal distance f and an image focal plane (PFI). The convergent lens (2) defines one of the walls of a casing (1) defined by two pairs of side walls (4a, 4c), a bottom wall (3) and a front wall defined by the lens (2), the side and bottom walls on the inside of the casing being reflective, and the depth p of the casing being lower than the focal distance f of the lens so that after multiple reflections, the ray beam (R1, R2) thus reflected is concentrated on a final image focus (I?) located inside the casing, the collector including a mobile receptor (6a) held inside the concentrated beam or in a position at least intersecting the beam by elements controlling the movement of the collector (6a) with that of the beam.