Abstract: A hydraulic engineered cementitious composite (ECC) material and an application thereof are provided. The ECC material includes 25-34 wt % of cement, 23-30 wt % of fly ash, 15-20 wt % of silica fume, 26-32 wt % a fine aggregate, 1.25-1.7% of a composite fiber mesh, 0.1-0.24 wt % of a water reducer, and 0.03-0.07 wt % of a thickener. The composite fiber mesh is prepared by dipping a composite fiber in a water-borne epoxy resin with a curing agent, performing uniform mixing, taking out and spreading the composite fiber, and then cutting or crushing the composite fiber into a small piece of mesh structure; and the composite fiber includes a PVA fiber and a carbon fiber, or a PVA fiber and a basalt fiber, at a weight ratio of (0.3-0.6):1.

Abstract: The present disclosure relates to the technical field of heat dissipation for electronic devices, and discloses a manifold microchannel heat sink based on directional optimization of hotspot areas, including a power module, a heat dissipation substrate, a cold source device, and a diverter manifold; the heat dissipation substrate is arranged on the power module, a microchannel is provided on a side of the heat dissipation substrate away from the power module and on a back of a heat generating area of the power module for carrying the power module and dissipating heat from the power module. According to the manifold microchannel heat sink based on the directional optimization of hotspot areas, the local heat dissipation performance of the power module may be preliminarily changed by optimizing the microchannel on the heat dissipation substrate, which avoids poor heat dissipation temperature uniformity in a multi-heat source system.

Abstract: A direct locating method for calculating a position of a permanent magnet synchronous motor is provided. The direct locating method performed by a processor includes: three-phase stator currents of the permanent magnet synchronous motor are converted by coordinate to obtain the stator currents in the ?? two-phase stationary coordinate system, and the initial position region is determined. The stator currents in dq two-phase synchronous rotating coordinate system are obtained by coordinate conversion. The stator current cost model is established. Then the d-axis stator current is inputted into the cost model and the position is outputted, and the final estimated position is determined to realize the direct locating of the permanent magnet synchronous motor's position.

Abstract: The present invention belongs to the technical field of simulation of power semiconductor modules, and discloses a multi-physics co-simulation method of a power semiconductor module. The multi-physics co-simulation method of the power semiconductor module comprises: adopting professional circuit simulation software PSpice supporting a spice model to be imported into a device, and by designing a specific collaborative analysis method and performing secondary development of a software data exchange interface, i.e. constructing a coupling interface of co-simulation, performing electricity-heat-force co-simulation of two types of software PSpice and COMSOL by adopting an indirect coupling manner. The simulation time is greatly shortened, and the simulation efficiency is improved.

Abstract: The present disclosure relates to the technical field of heat dissipation for electronic devices, and discloses a manifold microchannel heat sink based on directional optimization of hotspot areas, including a power module, a heat dissipation substrate, a cold source device, and a diverter manifold; the heat dissipation substrate is arranged on the power module, a microchannel is provided on a side of the heat dissipation substrate away from the power module and on a back of a heat generating area of the power module for carrying the power module and dissipating heat from the power module. According to the manifold microchannel heat sink based on the directional optimization of hotspot areas, the local heat dissipation performance of the power module may be preliminarily changed by optimizing the microchannel on the heat dissipation substrate, which avoids poor heat dissipation temperature uniformity in a multi-heat source system.

Abstract: The present disclosure relates to plaster boards and methods for making them. For example, one aspect of the disclosure is a plaster board comprising one or more continuous layers of material disposed within a body of hardened plaster material, the first side and second side of each continuous layer of material being substantially covered by the hardened plaster material. In certain such embodiments, each continuous layer of material includes a polymer (e.g., a damping polymer) disposed on a carrier sheet. Another aspect of the disclosure relates to a method for making a plaster board that involves drying a wet body of plaster material while a continuous layer of material or precursor therefor is disposed within it.

Abstract: A pressure storage type spray pump is provided, which is capable of achieving continuous spraying with a simple and small structure and low cost, and has good safety performance. The spray pump includes a main column and a cylinder body, wherein a fluid channel extending in an axial direction is formed inside the main column, and the cylinder body accommodates a working liquid. The spray pump further includes a one-way valve mechanism, a storage chamber, and an upper elastic mechanism. The upper elastic mechanism displaces towards the maximum compression position when the main column is pressed, so that the storage chamber is in fluid communication with the fluid channel; and the upper elastic mechanism displaces towards the initial position when the main column is released.

Abstract: An innovative equipment system comprises a tap water reservoir system, a disinfectant reactor system, a pump system, a disinfection and safety door spraying system, a sewage recycling system and a sewage treatment system, wherein the tap water reservoir system is mainly configured to store tap water in advance according to actual cargo volumes and disinfection requirements, and generally in tons; and the disinfectant reactor system comprises boron-doped diamond electrode modules, a reactor indicating lamp module, a visible reactor, a smart control screen, at least one water tank and a structure protection module. The Innovative disinfection and sterilization equipment system can easily kill bacteria and viruses such as Escherichia coli, Staphylococcus aureus, Salmonella typhimurium, and new coronavirus in a short time and enhance disinfection efficiency.

Abstract: The present disclosure relates to plaster boards and methods for making them. For example, one aspect of the disclosure is a plaster board comprising one or more continuous layers of material disposed within a body of hardened plaster material, the first side and second side of each continuous layer of material being substantially covered by the hardened plaster material. In certain such embodiments, each continuous layer of material includes a polymer (e.g., a damping polymer) disposed on a carrier sheet. Another aspect of the disclosure relates to a method for making a plaster board that involves drying a wet body of plaster material while a continuous layer of material or precursor therefor is disposed within it.

Abstract: A vaporization core for heating and vaporizing an aerosol-generation substrate includes: a first substrate having a first surface and a second surface opposite the first surface, the first surface being provided with a first microgroove array, the first microgroove array including a plurality of first microgrooves, the plurality of first microgrooves guiding a flowing of an aerosol-generation substrate, the first substrate including a dense material; and a first heating element arranged on the second surface for heating the first substrate to vaporize the aerosol-generation substrate in the plurality of first microgrooves.

Abstract: A heating body for heating a vaporized aerosol generation substrate includes: a substrate layer having a first surface and a second surface opposite the first surface; a heating layer formed on the first surface and/or the second surface; and a plurality of through holes having a capillary force. Each through hole of the plurality of through holes is elongated and extends through the first surface to the second surface.

Abstract: The present disclosure relates to a plaster board comprising a first layer of hardened plaster material comprising a first surface and an opposed second surface, a second layer of hardened plaster material comprising a first surface and an opposed second surface, wherein the first surface of the second layer faces the first surface of the first layer, and a viscoelastic interlayer disposed between the first surface of the first layer and the first surface of the second layer, wherein the interlayer includes a score-and-snap element.

Abstract: A sound absorbing panel and method therefor comprising providing a first sheet of photosensitive material, applying a first mask having a first plurality of features to the first sheet of photosensitive material, exposing the masked material to ultraviolet light, heating the first sheet of photosensitive material to form crystals in exposed portions of the first sheet, and etching the crystals to form a second plurality of features in the first sheet of photosensitive material.

Abstract: Disclosed herein are speaker assemblies and acoustic devices comprising a panel having a long side and a short side, at least one transducer configured to excite the panel at a plurality of excitation locations on the panel to generate a wave having a wave front substantially perpendicular to the long side and propagating toward the short side of the panel and, optionally, at least one attenuating component mounted to the panel. Methods for generating an acoustic sound are also disclosed herein.

Abstract: Metal-organic framework materials can be used as acoustic attenuation materials. A sound attenuation material includes a metal-organic framework material that attenuates audible frequency sound incident thereon. The sound attenuating material can be used in acoustic applications such as building construction materials.

Abstract: The present disclosure relates to plaster boards and methods for making them. For example, one aspect of the disclosure is a plaster board comprising one or more continuous layers of material disposed within a body of hardened plaster material, the first side and second side of each continuous layer of material being substantially covered by the hardened plaster material. In certain such embodiments, each continuous layer of material includes a polymer (e.g., a damping polymer) disposed on a carrier sheet. Another aspect of the disclosure relates to a method for making a plaster board that involves drying a wet body of plaster material while a continuous layer of material or precursor therefor is disposed within it.

Abstract: Methods of conveying a glass ribbon are provided that each includes the step of conveying the glass ribbon over a support device with a cushion of fluid supporting the glass ribbon over the support device. Each method further includes the step of monitoring a physical contact event between the glass ribbon and the support device by detecting an acoustic signal associated with the physical contact event. In further examples, glass ribbon conveying apparatus are provided that each includes a support device configured to support a glass ribbon over the support device with a cushion of fluid. Each apparatus further includes an acoustic sensor configured to monitor a physical contact event between the glass ribbon and the support device by detecting an acoustic signal associated with the physical contact event.

Abstract: Disclosed herein are speaker assemblies and acoustic devices comprising a panel having a long side and a short side, at least one transducer configured to excite the panel at a plurality of excitation locations on the panel to generate a wave having a wave front substantially perpendicular to the long side and propagating toward the short side of the panel and, optionally, at least one attenuating component mounted to the panel. Methods for generating an acoustic sound are also disclosed herein.

Abstract: A gypsum panel has a gypsum body with a length L along an x-axis, a width W along a y-axis, and a thickness T along a z-axis. The gypsum body includes at least one core embedded at least partially within the gypsum body. Examples of the core include a hollow, open cell structure having walled elements. The walled elements have axes that can be substantially parallel to each other and the z-axis. The walled elements may be substantially filled with a same material as the gypsum body.

Abstract: Embodiments disclosed herein include a device with an integrated acoustics function that includes a patterned touch screen cover, an acoustic thin film, a plurality of electrodes, and a substrate. In some embodiments, the substrate is coupled to the acoustic thin film and reduces heat loss from the acoustic thin film through the substrate. The acoustic thin film may be coupled to the patterned touch screen cover and conducts an oscillating electrical current provided by the plurality of electrodes, thereby acting as a nano-scale acoustic generator. In still some embodiments, the patterned touch screen cover provides an array of microspeakers and a viewing area, where the array of microspeakers is disposed around a perimeter of the patterned touch screen cover.