Abstract: A method for preparing hydrogen sulfide from sulfur dioxide by electrochemical reduction includes electrochemically reducing sulfur dioxide absorbed in an aqueous solution into gaseous hydrogen sulfide with a membrane electrode, resulting in efficient and selective conversion of the sulfur dioxide absorbed in the aqueous solution into the hydrogen sulfide to avoid a deactivation of a cathode due to colloidal sulfur produced on the cathode and adhesion onto a surface of the cathode, wherein the method is carried out at ambient temperature and normal pressure without addition of a reducing agent, having no waste salts produced, and is simple in operation, and is convenient for large-scale application.

Abstract: A subway hybrid-energy multifunctional-end-integrated heat pump system includes energy and user ends and hot water tank. A first energy end includes a capillary-tube front-end heat exchanger and a subway capillary heat pump unit. A second energy end includes a solar panel. A third energy end includes an air-cooled heat pump unit. The user end includes air conditioner, hot water supply, underfloor heating, and radiator heating ends. The first, second and third energy ends connect to the hot water tank. A water outlet is connected to the air conditioner, hot water supply, underfloor heating, and radiator heating ends. Water outlets of the air conditioner, underfloor heating, and radiator heating ends are respectively connected to the first, second and third energy end through a return pipe.

Abstract: Disclosed is a specimen retrieval device without introducing handle for minimally invasive surgery, which includes an endobag, a variable-diameter assembly for endobag collection and release, an elastic opening expansion mechanism and an opening closure assembly. The variable-diameter assembly for endobag collection and release is a cylindrical structure formed by curling an elastic sheet-shaped object, and in a natural state, two ends of the elastic sheet-shaped object are partially overlapped and separated from each other. The elastic opening expansion mechanism and the opening closure assembly are disposed in an opening of the endobag. The endobag is placed in the variable-diameter assembly for endobag collection and release; and the variable-diameter assembly for endobag collection and release is placed in a trocar cannula.

Abstract: A display device and a speaker assembly are provided, the speaker assembly is located in a first rear housing or a second rear housing and includes a shell, a first speaker unit and a second speaker unit, the shell has a cavity, the cavity has a baffle disposed therein, the cavity is divided into a first cavity and a second cavity by the baffle, the first speaker unit and the second speaker unit are respectively located in the first cavity and the second cavity, and the speaker has a relatively low degree of distortion and a relatively high reliability.

Abstract: The disclosure relates to a BCMA-targeting chimeric antigen receptor and uses thereof. Specifically, the disclosure provides a polynucleotide sequence selected from the group consisting of: (1) a polynucleotide sequence comprising, linked in sequence, a sequence encoding an anti-BCMA single chain antibody, a sequence encoding the hinge region of human CD8?, a sequence encoding the transmembrane region of human CD8, a sequence encoding the intracellular domain of human 41BB, a sequence encoding the intracellular domain of human CD3? and optionally a sequence encoding a fragment of EGFR comprising the extracellular domain III and the extracellular domain IV; and (2) a complementary sequence of the polynucleotide sequence of (1). The disclosure further provides corresponding fusion proteins and vectors comprising the coding sequence, as well as uses of the fusion proteins, coding sequences and vectors.

Abstract: A high-bandwidth bend-insensitive multimode fiber includes a core laver and a cladding including an inner cladding, a depressed cladding, and an outer cladding arranged sequentially from inside to outside. The core layer is a silicon dioxide glass layer co-doped with germanium, phosphorus (P), and fluorine (F) and has a refractive index profile in a shape of a parabola, a distribution index in a range of 2.0-2.3, a radius in a range of 23-27 ?m, and a maximum relative refractive index difference in a range of 0.9-1.2% at its center. A contribution amount of P at the center is in a range of 0.01-0.30%. A doping amount of F increases from the center to the edge of the core layer. A contribution amount of F at the center and edge of the core layer is in range of 0.0% to ?0.1%, and ?0.40% to ?0.20%, respectively.

Abstract: A display device and a speaker assembly are provided, the speaker assembly is located in a first rear housing or a second rear housing and includes a shell, a first speaker unit and a second speaker unit, the shell has a cavity, the cavity has a baffle disposed therein, the cavity is divided into a first cavity and a second cavity by the baffle, the first speaker unit and the second speaker unit are respectively located in the first cavity and the second cavity, and the speaker has a relatively low degree of distortion and a relatively high reliability.

Abstract: A small core-diameter graded-index optical fiber include a core layer and a cladding having an inner cladding layer, a depressed cladding layer, and an outer cladding layer from inside to outside thereof. The core layer has a parabolic refractive index profile with a distribution index in a range of 1.9-2.1, a radius in a range of 10-21 ?m, and a ?1 max in a range of 0.7-1.7% at a core layer center, and is a silica glass layer co-doped with germanium, phosphorus, and fluoride. The inner cladding layer is a pure silica layer or an F-doped silica glass layer, and has a unilateral width in a range of 0.5-5 ?m and a ?2 in a range of ?0.4-0%. The depressed cladding layer has a unilateral width in a range of 2-10 ?m and a ?3 in a range from ?0.8% to ?0.2%. The outer cladding layer is a pure silica glass layer.

Abstract: Compositions, systems and methods for the diagnosing the risk of acute myocardial infarction are provided. The methods described herein relate to the use of biomarkers, such as gene expression profiles, and analytical tools for providing information to a health care provider or the patient, that is relevant to the cardiovascular health of the patient.

Abstract: Embodiments of the present invention provide a LiDAR system and a laser ranging method. The LiDAR system includes: a laser scanning component and a rotary component; where the laser scanning component includes an emitter assembly, an emitter lens, a receiver lens and a receiver assembly. The emitter assembly includes a plurality of laser emitters and a first optical fiber array, and the receiver assembly includes a plurality of receivers and a second optical fiber array. With the LiDAR system according to the embodiments of the present invention, by using an optical fiber array as a laser emitter end of an emitter assembly, and a reflected light incident end of a receiver assembly, the size of the LiDAR may be reduced, and the production and calibration cost may be lowered.

Abstract: Embodiments of the present invention provide a LiDAR system and a laser ranging method. The system includes: a laser scanning component and a rotary component; the laser scanning component includes an emitter assembly, an emitter lens, a receiver lens and a receiver assembly. Further, the emitter assembly includes a plurality of emitter modules, a plurality of multi-core optical fiber connectors and a first optical fiber array; and the receiver assembly includes a plurality of receiver modules, a plurality of multi-core optical fiber connectors and a second optical fiber array. With the LiDAR system according to the embodiments of the present invention, by using the optical fiber array as a laser emitter end of an emitter assembly, and a reflected light incident end of a receiver assembly, the size of the LiDAR may be reduced, and the production cost may be lowered.