Abstract: A lumbar support belt includes a back belt, a first waist belt, a second waist belt, and a tightening mechanism. The first waist belt and the second waist belt are connected to two ends of the back belt, respectively, to wrap around the waist and the abdomen of a user. The back belt is a plastic support board. The first waist belt includes a first front part and the second waist belt includes a second front part. The first front part and the second front part are attached to each other to form a compression belt abutting against the abdomen of the user. The first waist belt includes a first back part and the second waist belt includes a second back part. The first back part and the second back part are disposed at a distance from the support board.

Abstract: A heat exchanger includes a pipe connection structure including a first coupling element and a second coupling element. The first coupling element includes a through-hole formed therethrough and the second coupling element includes a blind hole formed therein. A manifold tank includes a first tank compartment in alignment with the through-hole of the first coupling element and a second tank compartment in alignment with the blind hole of the second coupling element. The through-hole provides fluid communication between an interior of the pipe connection structure and the first tank compartment while the second coupling element forms a fluid barrier wall at an end of the blind hole thereof that prevents fluid communication between the interior of the pipe connection structure and the second tank compartment by way of the second coupling element.

Abstract: Provided are a control method for an air intake intercooler of an engine and a control system thereof, which relates to the technical field of intercoolers. The air intake intercooler includes a primary thermal management unit that can heat and cool intake air. The control method for the air intake intercooler includes acquiring real-time air intake temperature of an air inlet of the intake intercooler; controlling the primary thermal management unit to turn on a heating mode in response to the real-time air intake temperature being lower than a set minimum temperature limit value; and controlling the primary thermal management unit to turn on a cooling mode in response to the real-time air intake temperature being higher than the set maximum temperature limit.

Abstract: An aspect of the disclosure relates to a thin film including an amorphous array of particles including a top surface and a bottom surface opposing each other, the thin film exhibiting thin film interference and further coherent scattering from the amorphous array of particles, wherein the thin film may include first regions and second regions, wherein the thin film interference of the second regions may be suppressed as compared to the first regions. Another aspect of the disclosure relates to a product including an indicium including a thin film in accordance with any of the previous claims, wherein the indicium may include an encoded pattern encoded by the relative position of the second regions to the first regions, wherein the encoded pattern may be visible under specular reflection of light of a pre-determined wavelength. Another aspect of the disclosure relates to a method of producing a thin film.

Abstract: A lumbar support belt includes a back belt, a first waist belt, a second waist belt, and a tightening mechanism. The first waist belt and the second waist belt are connected to two ends of the back belt, respectively, to wrap around the waist and the abdomen of a user. The back belt is a plastic support board. The first waist belt includes a first front part and the second waist belt includes a second front part. The first front part and the second front part are attached to each other to form a compression belt abutting against the abdomen of the user. The first waist belt includes a first back part and the second waist belt includes a second back part. The first back part and the second back part are disposed at a distance from the support board.

Abstract: A parking management system and a parking management method are disclosed. The parking management system includes a control device and a parking space boundary indicating device. The control device is configured to acquire size information of a vehicle to be parked and information of the vacant area where no vehicle is parked in a parking lot, determine parking area information of the vehicle to be parked according to the size information and the information of the vacant area, and send the parking area information to the parking space boundary indicating device; the parking space boundary indicating device is configured to form parking space boundary lines by shedding light on a parking area according to the parking area information.

Abstract: The present disclosure generally relates to display technologies. A liquid crystal display panel includes: a light guide layer having a first refractive index, a refractive layer on the light guide layer, a first polarizing layer on the refractive layer, a color filter layer on the first polarizing layer, a liquid crystal layer on the color filter layer, and an array substrate on the liquid crystal layer. The refractive layer includes a plurality of higher refractive index portions having a second refractive index and a plurality of lower refractive index portions having a third refractive index, the plurality of higher refractive index portions and the plurality of lower refractive index portions being arranged in an alternating manner. The liquid crystal display panel is configured to emit light substantially through the higher refractive index portions of the refractive layer.

Abstract: The present disclosure generally relates to display technologies. A liquid crystal display panel includes: a light guide layer having a first refractive index, a refractive layer on the light guide layer, a first polarizing layer on the refractive layer, a color filter layer on the first polarizing layer, a liquid crystal layer on the color filter layer, and an array substrate on the liquid crystal layer. The refractive layer includes a plurality of higher refractive index portions having a second refractive index and a plurality of lower refractive index portions having a third refractive index, the plurality of higher refractive index portions and the plurality of lower refractive index portions being arranged in an alternating manner. The liquid crystal display panel is configured to emit light substantially through the higher refractive index portions of the refractive layer.

Abstract: According to the present disclosure, an isotropic structural colour printing process is provided. The process comprising (a) providing an ink composition comprising ink particles (such as polymeric particles (e.g. polystyrene), metal-organic frameworks (MOFs) (e.g. ZIF-8)) in a liquid reagent; and (b) depositing the ink composition onto a surface of a substrate (e.g. anodic aluminium oxide membrane, photo papers). Due to capillary action and/or absorption of the liquid reagent, the ink particles form an amorphous arrangement of structures that lead to isotropic structural colour. In the preferred embodiment, the ink particles may further be coated with a catechol group (such as polydopamine). An apparatus for detecting a target substance in the gaseous phase, wherein the apparatus comprises a nanostructure capable of exhibiting a change in isotropic structural colour when one or more molecules of the target substance are entrapped as an indication that the target substance is present, is also provided.

Abstract: The present disclosure provides a rapid passing method and device for a target vehicle. The rapid passing method for the target vehicle includes: determining a passing route of the target vehicle according to a place where the target vehicle is located and a destination; acquiring position information of the target vehicle in real time; and controlling lane indicating devices in the passing route to indicate a special-purpose lane used by the target vehicle in the passing route according to the real-time position information and the passing route of the target vehicle, and controlling traffic lights to indicate vehicles disturbing passing of the target vehicle to stop driving when the target vehicle passes through an intersection.

Abstract: A parking management system and a parking management method are disclosed. The parking management system includes a control device and a parking space boundary indicating device. The control device is configured to acquire width size information of a vehicle to be parked and information of the vacant area where no vehicle is parked in a parking lot, determine parking area information of the vehicle to be parked according to the width size information and the information of the vacant area, and send the parking area information to the parking space boundary indicating device; the parking space boundary indicating device is configured to form parking space boundary lines by shedding light on a parking area according to the parking area information.

Abstract: The present disclosure provides a cloud search-based recommendation method, apparatus, device and readable storage medium, including: determining a plurality of third-party applications according to search information input by a user; judging whether the third-party applications are installed, if a third-party application of the plurality third-party applications is not installed, generating a virtual application for simulating the third-party application, and acquiring a search result through the virtual application; determining and displaying a recommendation result corresponding to the search information according to the search result. In the solutions provided by the present disclosure, a virtual application is generated for the application that is not installed, so that a user terminal can still use a function provided by the third-party application in the case that the third-party application is not installed.

Abstract: The application discloses a color filter substrate, an array substrate, a display panel and a display device. The color filter substrate comprises a first base substrate and a plurality of pixel units provided above the first base substrate, each of the pixel units comprising color filters of various colors; from a pixel unit close to a first side of the first base substrate towards a pixel unit close to a second side of the first base substrate opposite to the first side, a ratio of an area of a color filter of a specific color to that of any one of color filters of other colors is increased gradually. In the application, the color filter of the specific color is able to compensate for the color shift of the light guide plate, alleviating the color shift of the display device, and thereby improving the image quality of the display device.

Abstract: Disclosed are a method and a device for acquiring the fetal fraction of cfDNA, a storage medium and an electronic device. The method comprises: acquiring sequencing data of a sample taken from a mother pregnant with a fetus; establishing a joint probability distribution model of the maternal and fetal genotypes, the joint probability distribution model containing one or more factors affecting the read heterozygosity, the percentage of the read heterozygosity being the ratio of the number of SNPs covered by different bases to the total number of SNPs covered by more than one reads in the sequencing data; substituting the values of the one or more factors and of the acquired read heterozygosity into the established joint probability distribution model; and obtaining the fetal fraction of cfDNA by maximum likelihood estimation of the joint probability distribution model.

Abstract: According to the present disclosure, an isotropic structural colour printing process is provided. The process comprising (a) providing an ink composition comprising ink particles (such as polymeric particles (e.g. polystyrene), metal-organic frameworks (MOFs) (e.g. ZIF-8)) in a liquid reagent; and (b) depositing the ink composition onto a surface of a substrate (e.g. anodic aluminium oxide membrane, photo papers). Due to capillary action and/or absorption of the liquid reagent, the ink particles form an amorphous arrangement of structures that lead to isotropic structural colour. In the preferred embodiment, the ink particles may further be coated with a catechol group (such as polydopamine). An apparatus for detecting a target substance in the gaseous phase, wherein the apparatus comprises a nanostructure capable of exhibiting a change in isotropic structural colour when one or more molecules of the target substance are entrapped as an indication that the target substance is present, is also provided.

Abstract: The application discloses a color filter substrate, an array substrate, a display panel and a display device. The color filter substrate comprises a first base substrate and a plurality of pixel units provided above the first base substrate, each of the pixel units comprising color filters of various colors; from a pixel unit close to a first side of the first base substrate towards a pixel unit close to a second side of the first base substrate opposite to the first side, a ratio of an area of a color filter of a specific color to that of any one of color filters of other colors is increased gradually. In the application, the color filter of the specific color is able to compensate for the color shift of the light guide plate, alleviating the color shift of the display device, and thereby improving the image quality of the display device.

Abstract: The present disclosure provides a light emitting diode (LED) package structure, a backlight module and a display device, and relates to the field of display technologies. The LED package structure includes an encapsulation housing and an LED chip encapsulated in the encapsulation housing. The encapsulation housing is a polyhedron which includes at least one inclined plane. One inclined plane of the encapsulation housing is a light exiting surface of the LED package structure.

Abstract: A method of preparing selective catalytic reduction composite catalyst is provided. First, first metal compound support, second metal compound, third metal compound and water are mixed to formed a precursor solution. Then, dried mixture powder is formed from the precursor solution by a spray-drying process. Thereafter, a calcination process is performed on the dried mixture powder.

Abstract: The LED light strip according to the present disclosure may include a circuit board and a plurality of LEDs which are arranged and spaced on the circuit board along a first straight line. A gap may be formed between two adjacent LEDs. Projections of two adjacent LEDs on a first projection plane may at least partially overlap, and the first projection plane may be a plane perpendicular to the circuit board and parallel to the first straight line.

Abstract: A backlight of a display panel includes a blue light source, a green light source and a red light emitting layer above the green and blue light sources. The red light emitting layer emits red light when being irradiated by blue light and emits no light when being irradiated by green light. The display panel further includes a control circuit, which controls the blue light source to be turned on in a first period of time, controls the green light source to be turned on in a second period of time, and controls the red liquid crystal cell, the green liquid crystal cell and/or the blue liquid crystal cell to be turned on and/or turned off in the first period of time and/or the second period of time according to a color to be displayed by a target pixel.