Abstract: An optical film includes a plurality of helically arranged liquid crystals and organic solid crystal structures at least partially surrounding the plurality of helically arranged liquid crystals. A method of making the optical film includes obtaining a substrate with an alignment layer and a film of a first solution on the alignment layer. The first solution includes liquid crystals and organic crystal molecules. The liquid crystals form a plurality of helically arranged liquid crystals on the alignment layer. The method also includes forming organic solid crystal structures by crystallizing the organic crystal molecules. The organic solid crystal structures at least partially surround the plurality of helically arranged liquid crystals.

Abstract: A foot massage arrangement include a shell body, a massage assembly and a control assembly, the massage assembly includes two sole massage heads, two heel massage heads, two first transmission units coupled to the two sole massage head respectively, and two second transmission units coupled to the two heel massage heads respectively, the control assembly includes a controller and a power source electrically connected to the controller for driving the two first transmission units and the two second transmission units, so as to respectively drive the two sole massage heads to rotate to massage two soles of the user and drive the two heel massage heads to linearly and reciprocate to massage two heels of the user.

Abstract: An optical film includes a block copolymer film defining a plurality of helically shaped cavities and a plurality of helically shaped organic solid crystals positioned within the plurality of helically shaped cavities. A method of making the optical film includes obtaining a film of a block copolymer solution including a chiral block copolymer and a non-chiral block copolymer on a substrate. The method includes annealing the film, thereby forming a plurality of helical structures from the chiral block copolymer defined within the non-chiral block copolymer and removing the plurality of helical structures, thereby creating a plurality of helically shaped cavities. The method further includes forming organic solid crystals inside the plurality of helically shaped cavities, thereby forming the optical film.

Abstract: An optical element includes a display device and an angular occlusion filter disposed over at least one surface of the display device. The angular occlusion filter may be configured to modulate one or more of transmission, reflection, and polarization of image or ambient light incident upon the display device.

Abstract: A motor control unit, an electric drive assembly and a vehicle. The motor control unit includes a cooling assembly, a power assembly and a filtration assembly, where the cooling assembly includes a box, the box including a cooling portion, a first mounting portion and a second mounting portion, the first mounting portion being on a side of the cooling portion in a first direction, and the second mounting portion being on the other side of the cooling portion opposite the first mounting portion in the first direction. The power assembly is mounted at the first mounting portion, and the filtration assembly is mounted at the second mounting portion, such that the cooling portion simultaneously cools the power assembly and the filtration assembly.

Abstract: The disclosure provides a security analysis method and system based on protocol state, which relates to the technical field of protocol security protection. The method includes the following: a node traversal table is built, the node traversal table is scanned and analyzed according to the protocol trigger sequence rule, a first security evaluation factor of a protocol stack is determined, and a second security evaluation factor of each protocol is determined based on protocol normal application rule, and the trustworthiness degree of the second security factor is determined based on the first security factor, and the second security factor is revised based on the trustworthiness degree, and the security state of the protocol is determined according to the revised second security factor, thus the analysis of the protocol state is realized, and the security of the protocol can be accurately determined.

Abstract: An optical film includes an organic solid crystal film formed of a contiguous organic solid crystal having a first dimension no less than 100 micrometer and a second dimension distinct from the first dimension no less than one centimeter. Methods for making the organic solid crystal film are also described.

Abstract: The disclosure provides a security analysis method and system based on protocol state, which relates to the technical field of protocol security protection. The method includes the following: a node traversal table is built, the node traversal table is scanned and analyzed according to the protocol trigger sequence rule, a first security evaluation factor of a protocol stack is determined, and a second security evaluation factor of each protocol is determined based on protocol normal application rule, and the trustworthiness degree of the second security factor is determined based on the first security factor, and the second security factor is revised based on the trustworthiness degree, and the security state of the protocol is determined according to the revised second security factor, thus the analysis of the protocol state is realized, and the security of the protocol can be accurately determined.

Abstract: A method includes applying a stress to a polymer thin film to stretch the polymer thin film along a first in-plane direction, and subsequently applying a stress to the polymer thin film to stretch the polymer thin film along a second in-plane direction orthogonal to the first in-plane direction to form an ultra-high modulus polymer thin film. Calendaring or hot pressing of the ultra-high modulus polymer thin film may improve its optical and/or thermal properties.

Abstract: The present invention discloses an interactive behavior understanding method for posture reconstruction based on skeleton and image features. The steps are as follows: constructing and preprocessing the data set, extracting skeleton and image features, fusing and reconstructing these features, and conducting experimental evaluation and validation. This method retains the purity of skeleton features for human behavior information extraction and uses image features to retain effective environmental information, complementing the model feature information. Skeleton features are extracted using a graph convolution network, enhancing the relevance of input skeleton point information for accurate feature extraction. Effective image features are quickly and accurately extracted through the Vision Transformer network combined with a multi-head attention mechanism.

Abstract: This application discloses a database transaction processing method performed by a computer device. The method includes: in a case of starting a target transaction, obtaining, by a working node in a distributed database system, a transaction timestamp of the target transaction and current global latest version information, the target transaction including at least one operation statement for a target data object, and the global latest version information being version information of latest generated metadata of metadata stored in the distributed database system; determining latest-version metadata of the target data object according to the current global latest version information, and determining to-be-accessed user data of the target transaction according to the transaction timestamp; and executing an operation statement of the target transaction on the to-be-accessed user data based on the latest-version metadata of the target data object.

Abstract: An optical film includes an organic solid crystal film formed of a contiguous organic solid crystal having a first dimension no less than 100 micrometer and a second dimension distinct from the first dimension no less than one centimeter. Methods for making the organic solid crystal film are also described.

Abstract: A barrier coating for optical devices or elements that comprises poly(1H, 1H,6H,6H-perfluorohexyl diacrylate) (pFHDA) and has desirable characteristics such as oil permeation protection, increased transparency, and thermal stability.

Abstract: A hydrogen refueling station based on low-temperature and high-pressure graded hydrogen storage includes: a liquid hydrogen storage tank, n?2 hydrogen storage vessels that are low-temperature and high-pressure vessels, a booster pump and a high-pressure vaporizer, disposed between the storage tank and the storage vessels. A temperature value and a maximum pressure value of gaseous hydrogen stored in the storage vessels are Tn and Pn; when n=2, T1<T2, P1<P2; and when n?3, T1< . . . T(n-1)<Tn, P1< . . . P(n-1)<Pn. A main refueling pipe is configured to communicate the hydrogen storage vessels with the hydrogen dispenser. A refueling controller is configured to, based on an ascending order of the temperature values, sequentially control corresponding hydrogen storage vessels to communicate with the hydrogen dispenser for participation in a refueling operation. A gaseous hydrogen refueling method based on the hydrogen refueling station is further provided.

Abstract: A device includes a substrate, an alignment structure disposed on the substrate, and a layer of a birefringent medium disposed on the alignment structure. The birefringent medium has an extraordinary refractive index, an ordinary refractive index different from the extraordinary refractive index, and an intermediate refractive index between the extraordinary refractive index and the ordinary refractive index. Molecules of the birefringent medium are configured to form helical structures having a helical axis. The layer is configured with an out-of-plane principal refractive index along the helical axis, and two equal in-plane principal refractive indices within a plane perpendicular to the helical axis. The out-of-plane principal refractive index is equal to the intermediate refractive index, and is substantially the same as the two equal in-plane principal refractive indices.

Abstract: A polymer article includes an at least partially disentangled polyvinylidene fluoride (PVDF) family member composition and is characterized by an elastic modulus of at least 4 GPa and an electromechanical coupling factor (k31) of at least 0.1 at room temperature. A method of manufacturing such a polymer article may include forming an at least partially disentangled polymer composition into a polymer thin film or fiber, applying a tensile stress to the polymer article in an amount effective to induce a stretch ratio of at least approximately 5 in the thin film or fiber, and applying an electric field across a thickness dimension of the polymer article. Annealing and poling steps may separately or simultaneously accompany and/or follow the act of stretching.

Abstract: An optically clear, high strength, high modulus, and high thermal conductivity polyethylene thin film may be formed from a crystallizable polymer and an additive configured to interact with the crystallizable polymer to facilitate crystallite alignment and, in some examples, create a higher crystalline content within the polyethylene thin film. The polyethylene thin film may be characterized by a bimodal molecular weight distribution where the molecular weight of the additive may be less than approximately 5% of the molecular weight of the crystallizable polymer. Example crystallizable polymers may include high molecular weight polyethylene, high density polyethylene, and ultra-high molecular weight polyethylene. Example additives may include low molecular weight polyethylene and polyethylene oligomers. The polyethylene thin film may be characterized by a Young's modulus of at least approximately 10 GPa, a tensile strength of at least approximately 0.

Abstract: A lightguide with partially reflective slanted polarization-selective bulk mirrors is disclosed. The lightguide may be used in a near-eye display with a polarized image source. The polarization-selective bulk mirrors reflect light of the polarized image source, and fully transmit light of the orthogonal polarization, causing the mirrors to be less conspicuous to an external viewer while preserving high efficiency of delivery of the image light to the viewer.

Abstract: A mechanically and piezoelectrically anisotropic polymer thin film is formed from a crystallizable polymer and an additive configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the polymer thin film. The polymer thin film and its method of manufacture may be characterized by a bimodal molecular weight distribution where the molecular weight of the additive may be less than approximately 5% of the molecular weight of the crystallizable polymer. Example polymers may include vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropylene, and vinyl fluoride. Example additives may occupy up to approximately 60 wt. % of the polymer thin film. The polymer thin film may be characterized by a piezoelectric coefficient (d31) of at least approximately 5 pC/N or an electromechanical coupling factor (k31) of at least approximately 0.1.

Abstract: A notched filter includes a multilayer having alternating first and second polymer layers, the first polymer layers each including an isotropic polymer thin film having in-plane refractive indices n1x and n1y, and the second polymer layers each including an isotropic or anisotropic polymer thin film having in-plane refractive indices n2x and n2y, where a thickness of each successive first polymer layer decreases with increasing distance from a centerline of the multilayer, and a thickness of each successive second polymer layer increases with increasing distance from the centerline. Such a filter may be configured to reflect incident light having a desired polarization state within a predetermined and relatively narrow band.