Abstract: The present disclosure provides an electronic expansion valve, which includes: a valve body having an accommodating cavity and a valve port, and the valve port communicates with the accommodating cavity; a guide sleeve, which is disposed in the accommodating cavity; a valve head, which is movably disposed in the guide sleeve and configured for blocking or opening the valve port, and a balance channel is disposed in the valve head so as to enable two ends of the valve head to be communicated; the valve head has a first end and a second end which are oppositely disposed, the first end is configured for blocking the valve port, a refrigerant medium and the first end have a first stress area S1, the refrigerant medium and the second end have a second stress area S2, and ?1.3 mm2?S1?S2?1.3 mm2.

Abstract: A method for simulating deep shale gas flow based on a dual-site Langmuir adsorption model is provided. The method includes: reconstructing a digital core of a deep shale gas reservoir, and extracting a pore network model; analyzing a structural parameter of the pore network model, and establishing calculation models of a free-phase shale gas conductivity and an adsorption-phase shale gas conductivity; establishing a calculation model of a shale gas conductivity for pores and throats in the pore network model, and determining the shale gas conductivity in pores and throats in the pore network model; combining the pore network model with the calculation models of the free-phase shale gas conductivity, the adsorption-phase shale gas conductivity and the shale gas conductivity in pores and throats, establishing a simulation model of a deep shale gas conductivity and simulating a flow law of deep shale gas.

Abstract: An optical signal processing apparatus, an optical chip, a detection apparatus, and a terminal may be applied to the detection field. The optical signal processing apparatus includes one or more beam splitting units and a plurality of frequency mixing units. The beam splitting unit is configured to split signal light from a laser into local oscillation signal light, detection signal light, return signal light, and the like. The frequency mixing unit is configured to perform frequency mixing on the return signal light and the detection signal light, the return signal light includes an echo of the detection signal light. A topology structure of an element in the optical signal processing apparatus and a topology structure of a signal light transmission path are designed, so that signal crosstalk that may be caused by cross of optical paths is reduced, and detection performance is improved.

Abstract: Embodiments of this application provide an optical signal processing apparatus, a chip, a lidar, and a terminal, which may be applied to a detection field, an intelligent surveying and mapping field, an intelligent driving field, and the like. The optical signal processing apparatus includes a plurality of beam splitting units and a plurality of stages of amplification units, and signal light on a plurality of channels may be obtained by performing optical splitting on signal light from lasers through the plurality of beam splitting units. These pieces of signal light are amplified in a plurality of stages through the plurality of stages of amplification units, so that when a quantity of channels of output signal light is increased, power of the output signal light can be ensured, and detection performance can be improved.

Abstract: The present disclosure provides an electronic expansion valve, which includes: a valve body having an accommodating cavity and a valve port, and the valve port communicates with the accommodating cavity; a guide sleeve, which is disposed in the accommodating cavity; a valve head, which is movably disposed in the guide sleeve and configured for blocking or opening the valve port, and a balance channel is disposed in the valve head so as to enable two ends of the valve head to be communicated; the valve head has a first end and a second end which are oppositely disposed, the first end is configured for blocking the valve port, a refrigerant medium and the first end have a first stress area S1, the refrigerant medium and the second end have a second stress area S2, and ?1.3 mm2?S1?S2?1.3 mm2.

Abstract: A signal processing system includes a modulation system and a transmission system. The modulation system is configured to perform first modulation processing on a first subcarrier signal to obtain a second subcarrier signal. The modulation system is further configured to perform second modulation processing on the second subcarrier signal and a first signal light to obtain a transmission signal light. The transmission signal light includes a single-frequency optical carrier signal and an optical sideband signal, and a frequency band of the single-frequency optical carrier signal and a frequency band of the optical sideband signal do not completely overlap. The transmission system is configured to transmit the transmission signal light.

Abstract: A detection system includes a beam splitting module, a polarization module, and a frequency mixer. The beam splitting module is configured to perform beam splitting processing on an input signal light to obtain a first signal light and a second signal light. The polarization module is configured to: output a transmitted signal light obtained after at least first polarization processing is performed on the first signal light; and obtain a reflected signal light of the transmitted signal light, and output a third signal light obtained after at least second polarization processing is performed on the reflected signal light. The frequency mixer is configured to perform frequency mixing processing on the second signal light and the third signal light, or is configured to perform frequency mixing processing on the third signal light and a fourth signal light obtained after at least third polarization processing is performed on the second signal light.

Abstract: A laser radar and an intelligent vehicle are provided, and may be specifically applied to the field of intelligent vehicles. The laser radar may include: a laser, configured to generate a laser signal; a beam shaping module, configured to perform collimation on the laser signal (step 300); a beam splitting module, configured to perform beam splitting on a laser signal to obtain a sounding signal and a local-frequency signal (step 301); a receiving module, configured to receive echo information and transmit the echo signal to an optical frequency mixing module (step 302); the optical frequency mixing module, configured to perform optical frequency mixing on the local-frequency signal and the echo information to obtain a first beat frequency signal and a second beat frequency signal (step 303); and a differential receiving unit, configured to differentially receive the first beat frequency signal and the second beat frequency signal.

Abstract: The present invention provides a pharmaceutical composition containing a pyrrolo-fused six-membered heterocyclic compound or a pharmaceutically acceptable salt of the compound. Specifically, the invention provides a pharmaceutical composition containing 5-(2-diethylamino-ethyl)-2-(5-fluoro-2-oxo-1,2-dihydro-indol-3-ylidene-methyl)-3-methyl-1,5,6,7-tetrahydro-pyrrolo[3,2-c]pyridin-4-one or a pharmaceutically acceptable salt thereof, and at least one water soluble filler. The pharmaceutical composition of the invention features a rapid dissolution and good stability.

Abstract: The present invention provides a method for preparing a pharmaceutical composition containing a pyrrolo-fused six-membered heterocyclic compound or a pharmaceutically acceptable salt thereof. Specifically, the invention provides a preparation method of a pharmaceutical composition, the method containing: mixing 5-(2-diethylamino-ethyl)-2-(5-fluoro-2-oxo-1,2-dihydro-indol-3-ylidene-methyl)-3-methyl-1,5,6,7-tetrahydro-pyrrolo[3,2-c]pyridin-4-one or a pharmaceutically acceptable salt thereof with at least one filler, and then granulating the mixture. The pharmaceutical composition of the invention features a rapid dissolution and good stability.

Abstract: The present invention provides a method for preparing a pharmaceutical composition containing a pyrrolo-fused six-membered heterocyclic compound or a pharmaceutically acceptable salt thereof. Specifically, the invention provides a preparation method of a pharmaceutical composition, the method containing: mixing 5-(2-diethylamino-ethyl)-2-(5-fluoro-2-oxo-1,2-dihydro-indol-3-ylidene-methyl)-3-methyl-1,5,6,7-tetrahydro-pyrrolo[3,2-c]pyridin-4-one or a pharmaceutically acceptable salt thereof with at least one filler, and then granulating the mixture. The pharmaceutical composition of the invention features a rapid dissolution and good stability.

Abstract: The present invention provides a pharmaceutical composition containing a pyrrolo-fused six-membered heterocyclic compound or a pharmaceutically acceptable salt of the compound. Specifically, the invention provides a pharmaceutical composition containing 5-(2-diethylamino-ethyl)-2-(5-fluoro-2-oxo-1,2-dihydro-indol-3-ylidene-methyl)-3-methyl-1,5,6,7-tetrahydro-pyrrolo[3,2-c]pyridin-4-one or a pharmaceutically acceptable salt thereof, and at least one water soluble filler. The pharmaceutical composition of the invention features a rapid dissolution and good stability.