Abstract: A method for preparing quartz glass with low content of hydroxyl and high purity, includes providing silica powders including hydroxyl groups. The silica powders are dehydroxylated, which includes drying the silica powders at a first temperature, heating the silica powders up to a second temperature and introducing a first oxidizing gas including halogen gas, thereby obtaining first dehydroxylated powders, and heating the first dehydroxylated powders up to a third temperature and introducing a second oxidizing gas including oxygen or ozone, thereby obtaining second dehydroxylated powders. The second dehydroxylated powders are heated up to a fourth temperature to obtain a vitrified body. The vitrified body is cooled to obtain the quartz glass with low content of hydroxyl and high purity. The quartz glass prepared by the above method has low content of hydroxyl and high purity. A quartz glass with low content of hydroxyl and high purity is also provided.

Abstract: The present disclosure provides a quick release device, and relates to the technical field of accessories for electronic products. The quick release device includes a device body. A rotary tray is movably disposed at a bottom of the device body, and the rotary tray is used to connect a terminal bracket. A rotary buckle of which one end extends to the bottom of the device body and is fastened to the rotary tray is movably inside the device body, and the device body rotates 360° relative to the rotary buckle and the rotary tray. Through the spring-loaded bead, the device body may rotate 360° for adjustment and positioning, to meet a use requirement of a user. A product housing may be removed by only holding the product housing and toggling the operating rod. Therefore, operations are more simple, and convenience for outdoor sports is improved.

Abstract: Disclosed are a method and a device for balancing crankshaft deformation e, a crankshaft with counterweights determined according to the method, and a scroll compressor using the crankshaft. The method includes: determining a component centrifugal force required by a counterweight to overcome the crankshaft deformation caused by both an orbiting scroll centrifugal force and a gas force; and determining the counterweight according to the component centrifugal force. The counterweight is arranged on the crankshaft.

Abstract: A detection device includes a frame, a transport mechanism, detection mechanisms, and a grasping mechanism. The transport mechanism includes a feeding line, a first flow line, and a second flow line arranged in parallel on the frame. The detection mechanisms are arranged on the frame and located on two sides of the transport mechanism. The grasping mechanism is arranged on the frame and used to transport workpieces on the feeding line to the detection mechanisms, transport qualified workpieces to the first flow line, and transport unqualified workpieces to the second flow line.

Abstract: The present disclosure relates to polymers which contain a hydrophobic and hydrophilic segment which is sensitive to pH. In some aspects, the polymers form a micelle which is sensitive to pH and results in a change in fluorescence based upon the particular pH. In some aspects, the disclosure also provides methods of using the polymers for the imaging of cellular or extracellular environment or delivering a drug.

Abstract: The present invention relates to the technical field of endoscopes, and discloses a confocal endoscope with a fixing device.

Abstract: Methods, systems, and devices for wireless communications are disclosed by the present application. A request to establish a call using a first connection may be received, the first connection using a first radio access technology to communicate with a radio access network. During execution of a procedure to establish the call, a command to handover communications from the first connection to a second connection that uses a second radio access technology to communicate with the radio access network may be received. The second connection may be established in response to the command, and a message indicating that the request to establish the call was successfully received may be transmitted over the second connection. Also, a message indicating that an alert of the call is being issued may be transmitted over the second connection.

Abstract: Provided are a recombinant strain with modified gene BBD29_14900, and a method for constructing the same and use thereof, with the production of L-glutamic acid as a specific application. Further provided is a method for introducing a point mutation into the BBD29_14900 gene coding sequence in Corynebacterium or improving the expression thereof. The method can cause a bacterial strain with the mutation to increase the fermentation yield of glutamic acid. The point mutation involves a mutation of the base at position 1114 in the sequence of the BBD29_14900 gene from guanine (G) to adenine (A), and thus a substitution of aspartic acid at position 372 in the coded corresponding amino acid sequence with asparagine.

Abstract: Disclosed are strain having enhanced L-glutamic acid production capacity, and method for constructing the same and use thereof. A nucleotide sequence is provided by introducing a point mutation to a wild-type BBD29-00405 gene in Corynebacterium glutamicum so that the base at position 597 of SEQ ID NO: 1 is mutated from guanine (G) into adenine (A). Also provided is a recombinant strain obtained by introducing the polynucleotide sequence into L-glutamic acid-producing Corynebacterium glutamicum, the recombinant strain comprising a BBD29-00405 gene containing a point mutation. Compared with an unmodified strain, the resulting strain facilitates production of L-glutamic acid at a higher concentration.

Abstract: A recombinant strain with modified gene BBD29_11265 and a method for constructing the same are provided. The recombinant strain is a bacterium that generates L-glutamic acid, and has an improved expression of a polynucleotide encoding an amino acid sequence of SEQ ID NO: 3 or a homologous sequence thereof; the improved expression can be having a point mutation in, and an enhanced expression of the polynucleotide encoding an amino acid sequence of SEQ ID NO: 3 or a homologous sequence thereof. A genetically engineered bacterium in which the base at position 70 in the BBD29_112665 gene sequence is mutated to adenine from guanine, causing alanine at position 24 in the coded corresponding amino acid sequence to be substituted with threonine, and an engineered bacterium overexpressing the BBD29_112665 gene or BBD29_11265G70A gene are constructed in the present invention, facilitating an increase in the production and conversion rate of L-glutamic acid.

Abstract: A lipid delivery system, a virus-like structure (VLS) vaccine constructed therefrom, and a lipid particle capable of encapsulating an mRNA molecule encoding a SARS-CoV-2-specific antigen are provided. After the lipid particle encapsulates an mRNA molecule encoding a SARS-CoV-2 antigen, a SARS-CoV-2 S1 antigen protein can be embedded on a surface of an envelope structure of the lipid under specific buffer conditions to produce a VLS vaccine with an antigen-encoding mRNA molecule encapsulated inside and an outer membrane presenting a required viral antigen protein. The vaccine has a superior specific antibody-inducing ability to a SARS-CoV-2 mRNA vaccine and a polypeptide vaccine, can maintain a long-lasting high antibody level, and can also exhibit excellent immune binding abilities for the emerging different variants.

Abstract: Disclosed are a silencing device and a refrigerator; the silencing device includes a silencing body, the silencing body includes a hole wall enclosing a through hole and a silencing cavity formed inside the silencing body, and an opening communicated with the silencing cavity is provided on a surface of the hole wall. When the noise in the compressor compartment of the refrigerator passes through the through hole of the silencing device, the sound is transmitted into the silencing cavity through the opening. This achieves a good noise reduction effect while guaranteeing the normal operation of the refrigerator.

Abstract: Disclosed herein are a 3D shape covering article including a reaction injection molded product as core layer and two metal sheets located on both sides of the core layer, a battery pack including the covering article, and a process for preparing the battery pack.

Abstract: A light-emitting device used for a display panel includes: a light-emitting element and a solder gradient layer, the light-emitting element includes a light-emitting epitaxial layer and a pad layer formed on the light-emitting epitaxial layer, the solder gradient layer is disposed on the pad layer, and a melting point of the solder gradient layer gradually decreases in a direction facing away from the pad layer. In a process of soldering the light-emitting device to a backplate, because there are multiple melting point regions or metal layers with different melting points in the solder gradient layer, a temperature of primary soldering is controlled to be higher than that of repair soldering in the processes of the primary soldering and the repair soldering, which can avoid an influence of the repair soldering on a solder joint formed during the primary soldering, and effectively control a yield of soldering.

Abstract: A micro-electronic component, a bonding backplate and a bonding assembly are provided. The micro-electronic component includes: a micro-electronic element; a first bonding pad disposed on the micro-electronic element; a first solder layer disposed on a side of the first bonding pad facing away from the micro-electronic element; and a second bonding pad disposed on a side of the first solder layer facing away from the first bonding pad. The micro-electronic component, the bonding backplate and the bonding assembly can achieve a secondary welding bonding at a bonded position in the welding bonding process of the electronic component.

Abstract: A display panel, and light-emitting elements and a backplate used for display panels are provided. The backplate is provided thereon a first pad and a second pad serving as a repair pad. The first pad includes a first adhesive layer and a first bonding layer. The second pad includes a second adhesive layer and a second bonding layer. Each of the first and second bonding layers is a multi-layer structure including multiple single-metal layers. A bonding temperature of the first bonding layer is higher than that of the second bonding layer. The multiple single-metal layers are formed on both first and second pads by evaporation, so that a purity of each single-metal layer is ensured, facilitating alloys with different melting points are formed subsequently. When the second pad is heated to solder a LED chip for repairing, a first alloy on the first pad cannot be melted.

Abstract: A high strength cast magnesium alloy, relating to the technical field of magnesium alloy material preparation. The composition and mass percentage of cast magnesium alloy are: Zn 7.0%, Al 3.0%˜5.0%, Mn 0.3%˜0.5%, RE 0.5%˜1%, the total amount of unavoidable impurities is less than or equal to 0.04%, and the allowance is Mg, wherein the RE includes La and Ce, La and Ce account for 35% and 65% of the total amount of RE, respectively. Among them, Mn, La and Ce are added in the form of Mg-5 wt. % Mn, Mg-30 wt. % La and Mg-30 wt. % Ce intermediate alloys respectively. Then it is prepared through battering, melting, melt purification, pouring and heat treatment. By adding RE, the alloy melt can be purified, and the corrosion resistance and casting performance of the alloy can be increased. The tensile strength of the alloy is 300 MPa˜314 MPa, the elongation is 7%-13%, and the light rare earth content is low, the raw material and processing cost is low, and it is easy to realize mass production.

Abstract: The present disclosure discloses a routing path analysis method and device. The method includes a first step of determining a key node based on a label stack of segment routing of a data packet. The key node includes a diversion node, a next-hop working path node of the diversion node, and a next-hop protection path node of the diversion node. The diversion node is a crossed node of a working path and a protection path. The method further includes determining neighboring nodes of the key node as relevant nodes; querying for traffic information of the key node and traffic information of the relevant nodes; selecting, from the key node and the relevant nodes based on the traffic information, the nodes for the data packet to pass. The routing path of the data packet is determined based on the selected nodes.

Abstract: A data processing system is proposed which comprises two electronic devices, each of them having an electro-magnetic coupler embedded on the exterior casing, at least one of the electronic device having one or more sliding surfaces for directing relative movement between the two devices, such that they automatically come into correct alignment during the sliding.

Abstract: The present disclosure discloses a routing path analysis method and device. The method includes a first step of determining a key node based on a label stack of segment routing of a data packet. The key node includes a diversion node, a next-hop working path node of the diversion node, and a next-hop protection path node of the diversion node. The diversion node is a crossed node of a working path and a protection path. The method further includes determining neighboring nodes of the key node as relevant nodes; querying for traffic information of the key node and traffic information of the relevant nodes; selecting, from the key node and the relevant nodes based on the traffic information, the nodes for the data packet to pass. The routing path of the data packet is determined based on the selected nodes.