Abstract: A backlight module includes a light guide plate and a prismatic reflective film. The prismatic reflective film is disposed on a surface of the light guide plate opposite to a light exit surface of the light guide plate. A surface of the reflective film proximate to the light guide plate is provided with a plurality of protruding structures thereon. The plurality of protruding structures extending in a first direction. Tops of at least two of the plurality of protruding structures are uneven.

Abstract: A folding bathtub includes a bathtub body and a supporting body. The supporting body is provided with a support frame and support legs, the support legs are connected with the support frame, and the support frame is supported by the support legs. The support frame is detachably connected with the bathtub body, and the bathtub body is supported by the support frame, so that the support frame can be connected with the bathtub body when the bathtub body needs to be used by a user, the bathtub body is supported by the support legs and the support frame, and the bathtub body is prevented from being deformed to be convenient for the user to use.

Abstract: An online observation method of an anode nitrogen concentration for a proton exchange membrane fuel cell is disclosed. Firstly, a dynamic model of anode nitrogen concentration is established based on a gas transmembrane penetration model and an anode material conservation model of a fuel cell, and then an average voltage degradation value between a nitrogen partial pressure and an average monolithic cell voltage is obtained as online feedback information, an online observer of anode nitrogen concentration is established based on the dynamic model of anode nitrogen concentration and the online feedback information, and the anode nitrogen concentration of the fuel cell is obtained by the online observer. The new method solves the problem of online observation of anode nitrogen concentration during the operation of a proton exchange membrane fuel cell engine system under dynamic conditions.

Abstract: Provided herein are methods for preparing 3-({[(4R)-7-{methyl[4-(propan-2-yl)phenyl]amino}-3,4-dihydro-2H-1-benzopyran-4-yl]methyl}amino)pyridine-4-carboxylic acid and novel intermediate compounds for use in preparing histone demethylase inhibitors.

Abstract: The present invention discloses a RamA transcription factor mutant for promoting the production of N-acetylglucosamine and use thereof. The mutant is obtained by mutating lysine at position 90 to asparagine and serine at position 92 to lysine in a parent having an amino acid sequence as shown in SEQ ID NO: 2. The present invention provides a genetically engineered strain that overexpresses the RamA transcription factor mutant and increases the production of N-acetylglucosamine. By overexpressing the transcription factor RamA that is involved in the regulation of carbon metabolism, the extracellular accumulation of N-acetylglucosamine is increased, with a maximum concentration reaching 31.5 g/L, which lays a foundation for further metabolic engineering of Corynebacterium glutamicum to produce glucosamine. The method for constructing recombinant Corynebacterium glutamicum of the invention is simple, and convenient in use, and thus has good application prospects.

Abstract: The present invention relates to a solid Ziegler-Natta catalyst component for use in olefin polymerization. The catalyst component comprises magnesium, titanium, halide, one or more dicylopentyldialkoxysilane compounds, one or more dialkylaminotrialkoxysilane compounds, and one or more internal electron donors comprising urea, phthalate and 1,3-diether. The catalyst components, according to present invention, are able to produce polypropylene polymers having high isotacticity with high melt flow rate.

Abstract: The present invention relates to a compound of formula (I), or a tautomer, stereoisomer, pharmaceutically acceptable salt or isotopic variant thereof. The compound represented by formula (I) or the tautomer, stereoisomer, pharmaceutically acceptable salt or isotopic variant thereof is used as a novel linker compound, and can be used for preparing an ADC drug having a high DAR value. The present invention also relates to an ADC drug prepared by the linker.

Abstract: The present invention provides a process for producing a solid catalyst component without using internal electron donors, prepared by reacting an alkoxymagnesium compound with an acyl halide and/or sulfinyl halide and/or sulfonyl halide compound, and an alkanol and/or an alkanediol to form reaction product (A), optionally reacting the reaction product (A) with an organohalide and oranophosphorus compound to form reaction product (B), reacting the reaction product (B) with a halogen-containing titanium or vanadium compound to obtain the solid catalyst component (C). The solid catalyst component can be used in a olefin polymerization catalyst system to produce polypropylene polymers with high activity, high stereo-regularity, and good morphology.

Abstract: A portable toilet includes a toilet main body, connecting elements, elastic members and a plurality of supporting portions. Connecting elements rotatably arranged on the toilet main body. A plurality of supporting portions movably arranged on the connecting elements. Plug-in assemblies arranged between the supporting portions and the toilet main body. The plug-in assemblies include positioning slots and positioning block. The positioning blocks are placed in the positioning slots when the supporting portions are in a supporting state. Elastic members, wherein when a storage state is switched to a supporting state, the supporting portions rotate relative to the toilet main body and slide relative to the connecting elements. Positioning blocks can be separated from the positioning slots, so that the supporting portions can rotate conveniently.

Abstract: This present invention relates to a method for using halogenation agents to react with magnesium precursor or with magnesium complexes to form catalyst components without using internal electron donors. The catalyst components are used to produce polypropylene with good productivity and high stereospecificity. This method offers a wide range of catalyst component preparations and selections to enhance the catalyst component applications regarding activity, stereospecificity, hydrogen response, molecular weight, and distributions.

Abstract: A portable toilet includes a toilet main body, connecting elements, elastic members and a plurality of supporting portions. Connecting elements rotatably arranged on the toilet main body. A plurality of supporting portions movably arranged on the connecting elements. Plug-in assemblies arranged between the supporting portions and the toilet main body. The plug-in assemblies include positioning slots and positioning block. The positioning blocks are placed in the positioning slots when the supporting portions are in a supporting state. Elastic members, wherein when a storage state is switched to a supporting state, the supporting portions rotate relative to the toilet main body and slide relative to the connecting elements. Positioning blocks can be separated from the positioning slots, so that the supporting portions can rotate conveniently.

Abstract: An optical structure, a manufacturing method thereof and a display device. The optical structure has a light incident side and a light-exiting side, the optical structure includes a first lens, a transflective film, a phase retardation layer, and a polarizing reflective film. The first lens includes a first surface and a second surface, the phase retardation layer is located on a side of the second surface away from the first surface, the phase retardation layer includes an alignment layer and a liquid crystal layer, the manufacturing method includes: coating the alignment layer on the second surface of the first lens; using an alignment light source to optically align the alignment layer from the light incident side; coating the liquid crystal layer on a side of the alignment layer away from the second surface.

Abstract: Improved door lock mechanisms and kit for assembly into the same. The door lock mechanisms include a guide sleeve having a tapered portion for guiding a locking lever into a cross-hole of a locking bar. The cross-hole also allows the locking lever to be inserted into the cross-hole at multiple different orientations of the locking bar.

Abstract: A method and system for regulating a multi-component power distribution network with high proportion of distributed power sources.

Abstract: A semi-closed local low-vacuum laser welding device and welding method is provided. The semi-closed local low-vacuum laser welding device includes a local low-vacuum cabin, a dynamic sealing structure, a mechanical pump, and a laser welding mechanism. The local low-vacuum cabin includes a primary vacuum chamber, a secondary vacuum chamber and a tertiary vacuum chamber which are arranged in sequence, and a plate to be welded is arranged at a bottom of the primary vacuum chamber. The dynamic sealing structure is arranged at the bottom of the primary vacuum chamber, and the dynamic sealing structure is configured for connecting the primary vacuum chamber with the plate to be welded. The mechanical pump is in communication with the primary vacuum chamber and the secondary vacuum chamber. The laser welding mechanism is arranged corresponding to the local low-vacuum cabin, and is configured for welding the plate to be welded.

Abstract: The present invention discloses a preparation method of a cardanol-modified polyamine curing agent with high corrosion resistance. The method includes the following steps: subjecting cardanol, paraformaldehyde and an amine compound to Mannich reaction, after the Mannich reaction, adding a water-soluble initiator for polymerization reaction, then evaporating water and excessive amine compound under reduced pressure after the polymerization reaction, thus obtaining a cardanol-modified polyamine curing agent. The coating obtained by curing the curing agent with an epoxy resin has greatly improved chemical resistance and corrosion resistance, indicating that the use of the water-soluble initiator in this present invention enables olefins to be polymerized very well, and molecules are reinforced obviously after polymerization, thereby greatly improving the chemical resistance and corrosion resistance.