Abstract: A composite current collector, including a metal substrate layer and a functional layer located on a surface of the metal substrate layer; where the functional layer is analyzed using an energy dispersive spectrometer, and based on a total number of atoms of the C element, the O element, and a metal element in the functional layer, an atomic percentage of the C element in the functional layer is x, an atomic percentage of the O element in the functional layer is y, and an atomic percentage of the metal element in the functional layer is z, satisfying: 5%?x?25%, 10%?y?30%, and 55%?z?85%. The functional layer with specific element contents on the surface of the metal substrate layer, a coverage of a coating on a surface of the composite current collector can be effectively improved while electrical performance is ensured, thereby improving the safety of the electrochemical device.

Abstract: An electrochemical apparatus, including a positive electrode sheet, where the positive electrode sheet includes a positive electrode current collector, a first safety layer, and a first positive electrode active material layer. The positive electrode sheet includes a first region provided with the first positive electrode active material layer. The first safety layer includes a first part located in the first region. The first part is disposed between the positive electrode current collector and the first positive electrode active material layer. When the electrochemical apparatus is in a fully charged state at 25° C., a variation coefficient ?1 of a resistance R in the first region of the positive electrode sheet is ?15%. The electrochemical apparatus can have good low-temperature performance while the safety performance of the electrochemical apparatus is met.

Abstract: An electrochemical device, including a positive electrode, where the positive electrode includes a positive electrode current collector, a first protective layer, and a first positive electrode active material layer. The positive electrode current collector includes a first surface and a second surface opposite to each other, and the first protective layer is disposed between the first surface and the first positive electrode active material layer. The first surface includes a first region and a second region, where the first region is provided with the first positive electrode active material layer, and the second region is not provided with the first positive electrode active material layer. An area of the first region is A1 cm2, an area of the second region is A2 cm2, and an area of the first protective layer is A3 cm2, satisfying: 0.5?A3/(A1+A2)?1. The electrochemical device of this application has significantly improved safety performance.

Abstract: An electronic control unit includes a base plate that has a load-bearing area and a mounting area provided on a side of the load-bearing area. At least one guide hole penetrates the base plate and is provided in the mounting area. The electronic control unit further includes a housing mounted on the load-bearing area of the base plate. The housing includes a top wall and side walls extending downward from an edge of the top wall and continuously disposed around the top wall, with the top wall and the side walls collectively defining the accommodating space of the housing. The electronic control unit further includes a printed circuit board housed in the accommodating space between the base plate and the housing. Also, the electronic control unit includes an electrical connector electrically connected to the printed circuit board. The electrical connector is exposed through an opening provided on one of the side walls and is positioned above the guide holes.

Abstract: A method using an endogenous retrovirus (ERV) as a biomarker for detecting a degree of aging of an object or a cell, tissue or organ or isolated cell thereof. A method using an ERV as a target for treating, preventing or delaying aging of the subject or a cell, tissue or organ or isolated cell thereof.

Abstract: A genetically engineered strain having high-yield of L-valine is disclosed. Starting from Escherichia coli W3110, an acetolactate synthase gene alsS of Bacillus subtilis is inserted into a genome thereof and overexpressed; a ppGpp 3?-pyrophosphate hydrolase mutant R290E/K292D gene spoTM of Escherichia coli is inserted into the genome and overexpressed; a lactate dehydrogenase gene ldhA, a pyruvate formate lyase I gene pflB, and genes frdA, frdB, frdC, frdD of four subunits of fumaric acid reductase are deleted from the genome; a leucine dehydrogenase gene bcd of Bacillus subtilis replaces a branched chain amino acid transaminase gene ilvE of Escherichia coli; and an acetohydroxy acid isomeroreductase mutant L67E/R68F/K75E gene ilvCM replaces the native acetohydroxy acid isomeroreductase gene ilvC of Escherichia coli. Furthermore, the L-valine fermentation method is improved by using a two-stage dissolved oxygen control. The L-valine titer and the sugar-acid conversion rate are increased.

Abstract: An electrochemical apparatus includes an electrode. The electrode includes a current collector. The current collector includes a coated region provided with an active material and an uncoated region provided with no active material. The uncoated region is at least partially provided with an insulation layer. The insulation layer includes a binder and inorganic particles. A swelling rate of the insulation layer is not higher than 8% after the insulation layer is immersed in an electrolyte at 85° C. for 24 h.

Abstract: An electrochemical apparatus includes a positive electrode. The positive electrode includes a current collector, a first material layer, and a second material layer. The second material layer is disposed on at least one surface of the current collector, and the first material layer is disposed between the current collector and the second material layer. The first material layer includes a leveling agent. A difference between the maximum value and the minimum value of thickness of the first material layer is less than or equal to 3 ?m. The obtained positive electrode has high uniformity in thickness, and there is strong adhesion between the current collector and the first material layer, and between the second material layer and the first material layer.

Abstract: An electrochemical apparatus includes a positive electrode. The positive electrode includes a current collector. The current collector includes a coated region provided with an active material, and an uncoated region, where the uncoated region is at least partially provided with an insulation layer, and the insulation layer includes a binder and inorganic particles. Based on a total mass of the insulation layer, a mass percentage of element aluminum in the insulation layer is 20% to 52%. An adhesion F between the insulation layer and the current collector is not less than 201 N/m. In the electrochemical apparatus in this application, the safety of the electrochemical apparatus is improved due to sufficient adhesion between the insulation layer and the current collector of the positive electrode.

Abstract: A genetically engineered strain having high-yield of L-valine is disclosed. Starting from Escherichia coli W3110, an acetolactate synthase gene alsS of Bacillus subtilis is inserted into a genome thereof and overexpressed; a ppGpp 3?-pyrophosphate hydrolase mutant R290E/K292D gene spoTM of Escherichia coli is inserted into the genome and overexpressed; a lactate dehydrogenase gene ldhA, a pyruvate formate lyase I gene pflB, and genes frdA, frdB, frdC, frdD of four subunits of fumaric acid reductase are deleted from the genome; a leucine dehydrogenase gene bcd of Bacillus subtilis replaces a branched chain amino acid transaminase gene ilvE of Escherichia coli; and an acetohydroxy acid isomeroreductase mutant L67E/R68F/K75E gene ilvCM replaces the native acetohydroxy acid isomeroreductase gene ilvC of Escherichia coli. Furthermore, the L-valine fermentation method is improved by using a two-stage dissolved oxygen control. The L-valine titer and the sugar-acid conversion rate are increased.

Abstract: A method, apparatus and system for remote control of intelligent device are disclosed.

Abstract: A virtual reality speech control method and apparatus is provided in the present disclosure. The method includes: receiving a request for opening a speech interface from a VR application; opening a speech interface in response to the request and receiving input speech information through the speech interface; converting the speech information to text information, and normalizing the text information to generate an intent object in conformity with a preset specification; recognizing the intent object based on a preset specification set and acquiring an instruction corresponding to the intent object; sending the instruction to the VR application, such that the VR application executes the instruction and feeds back an execution result.

Abstract: A method, apparatus and system for remote control of intelligent device are disclosed.

Abstract: A virtual reality speech control method and apparatus is provided in the present disclosure. The method includes: receiving a request for opening a speech interface from a VR application; opening a speech interface in response to the request and receiving input speech information through the speech interface; converting the speech information to text information, and normalizing the text information to generate an intent object in conformity with a preset specification; recognizing the intent object based on a preset specification set and acquiring an instruction corresponding to the intent object; sending the instruction to the VR application, such that the VR application executes the instruction and feeds bake an execution result.

Abstract: A method of providing business object information on a web page includes the step of providing a web page after receiving a visit request. The web page comprises at least one first area and at least one second area, the first area comprising information of a plurality of target business objects, the second area comprising a plurality of sub-areas, a sub-area of the plurality of sub-areas displaying information of at least one business object.

Abstract: Siloxane cross-linked polyolefins provide for a composition that is more or less impermeable to gaseous sulfur compounds such as hydrogen sulfide providing for a protective coating for various articles of manufacture especially electronic components and a method of protecting various articles of manufacture from the effects of such gaseous sulfur compounds.

Abstract: Siloxane cross-linked polyolefins provide for a composition that is more or less impermeable to gaseous sulfur compounds such as hydrogen sulfide providing for a protective coating for various articles of manufacture especially electronic components and a method of protecting various articles of manufacture from the effects of such gaseous sulfur compounds.

Abstract: Siloxane cross-linked polyolefins provide for a composition that is more or less impermeable to gaseous sulfur compounds such as hydrogen sulfide providing for a protective coating for various articles of manufacture especially electronic components and a method of protecting various articles of manufacture from the effects of such gaseous sulfur compounds.