Abstract: The present invention discloses a high-precision right-angle detection device and method. By utilizing two right-angles surfaces of the component under measurement to reflect an incident laser and an emitted laser, the first-order Doppler effect is calculated. This is achieved by measuring the ion spectra of metastable state lithium ions using both the incident and emitted lasers. Subsequently, the angle between the incident and emitted laser is deduced based on the first-order Doppler effect. Finally, the right-angle of the component under measurement is determined. The invention employs the frequency of ion transition spectral lines as a reference, which serves as a natural and stable benchmark that does not require periodic calibration. Additionally, atomic or molecular transition spectral lines can also be utilized as references. A wide variety of ions, atoms, molecules, and their corresponding spectral lines are available, offering extensive wavelength coverage and diverse options.

Abstract: The present invention discloses a highly charged Nickel ion optical clock and its implementation method. It uses Ni12+ ions as the clock's reference system, which provides superior anti-interference capabilities and measurement precision compared to conventional low-charge-state ion optical clocks. The Ni12+ ions possess two transition spectral lines at 498 nm and 511 nm that can serve as clock transitions. Utilizing both 498 nm and 511 nm lasers enables a single ion reference system to output two clock signals, allowing for mutual verification. Frequency calibration using these two laser frequencies facilitates the timely detection of operational issues through abrupt changes in their frequency ratio. This approach avoids the problem inherent in a single optical frequency clock, where losing synchronization with the time reference can result in immediately undetectable, erroneous clock signal outputs, thereby significantly enhancing the overall stability of the optical clock.

Abstract: The present invention discloses a highly charged Nickel ion optical clock and its implementation method. It uses Ni12+ ions as the clock's reference system, which provides superior anti-interference capabilities and measurement precision compared to conventional low-charge-state ion optical clocks. The Ni12+ ions possess two transition spectral lines at 498 nm and 511 nm that can serve as clock transitions. Utilizing both 498 nm and 511 nm lasers enables a single ion reference system to output two clock signals, allowing for mutual verification. Frequency calibration using these two laser frequencies facilitates the timely detection of operational issues through abrupt changes in their frequency ratio. This approach avoids the problem inherent in a single optical frequency clock, where losing synchronization with the time reference can result in immediately undetectable, erroneous clock signal outputs, thereby significantly enhancing the overall stability of the optical clock.

Abstract: The embodiments of the disclosure provide a method, apparatus, device and storage medium for presenting information, which relate to the technical field of computers. The method includes: obtaining object search information, in response to the object search information being object category information, determining a target object category corresponding to the object search information, and presenting object information of a plurality of target objects corresponding to the target object category in a search result presentation page; where all the plurality of target objects are different, and object information of a target object includes object attribute information and image resource information of the target object. By employing the above technical solution, when the user is searching the object category, object information of a plurality of target objects different from each other corresponding to the target object category is presented in the search result page.

Abstract: A stability control method for a virtual synchronous generator (VSG) in a strong grid based on an inductance-current differential feedback is provided. A grid-connected topological structure of a VSG using the control method includes a direct-current (DC)-side voltage source, a three-phase inverter, a three-phase grid impedance and a three-phase grid. By controlling the VSG and controlling the inductance-current differential feedback, the method suppresses the oscillation of the output power from the VSG in the strong grid and implements the stable operation of an inner-loop-free VSG in the strong grid, without adding the physical inductance, increasing the cost of the filter and additionally providing a grid-side current sensor.

Abstract: A stability control method for a virtual synchronous generator (VSG) in a strong grid based on an inductance-current differential feedback is provided. A grid-connected topological structure of a VSG using the control method includes a direct-current (DC)-side voltage source, a three-phase inverter, a three-phase grid impedance and a three-phase grid. By controlling the VSG and controlling the inductance-current differential feedback, the method suppresses the oscillation of the output power from the VSG in the strong grid and implements the stable operation of an inner-loop-free VSG in the strong grid, without adding the physical inductance, increasing the cost of the filter and additionally providing a grid-side current sensor.

Abstract: An air conditioning system comprises a compressor (1), an outdoor heat exchanger (3), a first heat exchanger (101), a second heat exchanger (102) and at least two throttling devices, wherein the outdoor heat exchanger is a micro-passage heat exchanger and comprises a first inlet (31), a second inlet (32), an outlet (33), a distributing pipe (36), a collecting pipe (37), a flat pipe (38), a fin (39) and a distributor (34) which is located in the distributing pipe (36) and used for distributing a working medium, and a distribution small hole (35) is provided in the distributor (34); and the first inlet (31) is in direct communication with a distributing cavity (30) of the distributing pipe (36), while the second inlet (32) is in communication with the distributing cavity (30) through the distributing small hole (35) in the distributor (34).

Abstract: An air conditioning system comprises a compressor (1), an outdoor heat exchanger (3), a first heat exchanger (101), a second heat exchanger (102) and at least two throttling devices, wherein the outdoor heat exchanger is a micro-passage heat exchanger and comprises a first inlet (31), a second inlet (32), an outlet (33), a distributing pipe (36), a collecting pipe (37), a flat pipe (38), a fin (39) and a distributor (34) which is located in the distributing pipe (36) and used for distributing a working medium, and a distribution small hole (35) is provided in the distributor (34); and the first inlet (31) is in direct communication with a distributing cavity (30) of the distributing pipe (36), while the second inlet (32) is in communication with the distributing cavity (30) through the distributing small hole (35) in the distributor (34).

Abstract: A steam drier including a rotatable elongated drum (1) and a set of heating elements (2) provided in the interior space within the drum and supported on the drum in order to rotate along with it. Each heating element (2) includes a pair of straight first longitudinal pipes (3, 4) supported in parallel to each other at a distance (A) from each other. The first longitudinal pipes extend in the longitudinal direction of the drum. A pair of end pipes (5, 6) extends substantially transversely relative to the first longitudinal pipes in the vicinity of the ends of the first longitudinal pipes. The end pipes connect the first longitudinal pipes rigidly to each other. The first longitudinal pipes are provided in flow connection to each other through the end pipes in order to allow the flow of steam within the heating element. The heating element (2) includes a set of straight second longitudinal pipes (7) provided in parallel to the first longitudinal pipes (3, 4).