Abstract: The present disclosure provides a risk assessment method of water inrush in tunnels constructed in water-rich grounds. The method includes the following steps: simulating a tunnel excavation process by finite element software MIDAS GTS NX and fluid-structure interaction; according to a research method of control variables, analyzing effects of a groundwater level, an elastic modulus and advanced pipe shed grouting on the stability of surrounding rock, and improving an algorithm of a radial basis function (RBF) neural network using a Grey Relation Analysis (GRA)-based Partitioning Around Medoid (PAM) clustering algorithm to assess risks of water inrush occurring in Qingdao area.

Abstract: An engine includes a cylinder block, a cylinder head, and a piston. The cylinder head is connected to the cylinder block. The piston is movably connected to the cylinder block. The cylinder block, the cylinder head, and the piston form a combustion chamber. The cylinder head includes an intake valve hole and an exhaust valve hole. An intake valve is disposed at the intake valve hole and an exhaust valve is disposed at the exhaust valve hole. A barrier protrusion is protruded at the edge of the intake valve hole away from the exhaust valve hole. The included angle between a first connecting line connecting a first end of the barrier protrusion and a center of the intake valve hole and a second connecting line connecting a second end of the barrier protrusion and the center of the intake valve hole is greater than 120 degrees and less than or equal to 180 degrees.

Abstract: The present disclosure provides a multi-factor quantitative analysis method for deformation of a neighborhood tunnel. The method includes the following steps: analyzing monitoring data generated at a tunnel site; simulating collapse occurring at a shallow buried section of a tunnel; determining the degree of influence of each factor on the tunnel and a stratum; and determining quantitative influence of each factor on tunnel deformation. The present disclosure can not only provide an accurate theoretical basis for the construction of the shallow buried section of the small-distance tunnel, but also guarantee safety and cost saving during tunnel construction.

Abstract: Disclosed in the present invention is a heat-dissipating head-up display (HUD), including an outer housing, on which a light outlet through-hole is provided; a light source housing, wherein the light source housing and the outer housing are detachably connected, and an optical machine mechanism is also installed in the light source housing, and the optical machine mechanism is used to output image light to the outer housing; the light source housing is also provided with a heat-dissipating through-hole, the optical machine mechanism is also installed with a first heat-dissipating member, and the first heat-dissipating member passes through the light source housing via the heat-dissipating through-hole and extends outwards.

Abstract: Disclosed in the present invention is an efficient heat-dissipating head-up display (HUD), including an outer housing, on which a light outlet through-hole is provided; a light source housing, wherein the light source housing and the outer housing are detachably connected, and an optical machine mechanism is also installed in the light source housing, and the optical machine mechanism is used to output image light to the outer housing; and a heat conducting member is also connected between the optical machine mechanism and the light source housing, and the heat conducting member is used to conduct heat generated by the optical machine mechanism to the light source housing. In the present invention, the heat generated by the optical machine mechanism in the operating process can be directly conducted to the light source housing through the heat conducting member, thus improving the heat conduction efficiency.

Abstract: Provided are a water-based adhesive and a preparation method thereof, and its use in an anode of a lithium battery. The method for preparing a water-based adhesive includes mixing a surfactant, acrylic acid, acrylonitrile, acrylamide and water to obtain a mixture system; heating the mixture system to a polymerization temperature to obtain a heated mixture system; adding an initiator into the heated mixture system and subjecting a resulting system to polymerization to obtain a linear polymer; adding a cross-linking agent into the linear polymer and subjecting a resulting mixture to cross-linking reaction to obtain a cross-linking system; cooling the cross-linking system after the cross-linking reaction is completed to obtain a cooled cross-linking system; and adjusting a pH of the cooled cross-linking system to 6-7 to obtain the water-based adhesive.

Abstract: A radiation therapy system may include a magnetic resonance imaging (MRI) device configured to acquire MRI data with respect to a region of interest (ROI). The MRI device may include a main magnet that is around a longitudinal axis and configured to generate a magnetic field. The MRI device may also include a radiation therapy device configured to perform a treatment on at least one portion of the ROI by delivering, based on the MRI data, therapeutic radiation to the at least one portion of the ROI. The radiation therapy device may be rotatable around the longitudinal axis. The MRI device may also include a first shielding structure configured to provide interference shielding for the MRI device or the radiation therapy device. The radiation therapy device may be rotatable relative to the first shielding structure around the longitudinal axis.

Abstract: The present disclosure provides a modifier and a preparation method thereof, and a modified acrylic resin and a preparation method and use thereof, and relates to the technical field of leather auxiliaries. In the present disclosure, the modifier includes an acylate and/or a hyperbranched esterified polymer; where raw materials of the acylate include a first hydroxyl organic amine and maleic anhydride; and raw materials of the hyperbranched esterified polymer include a second hydroxyl organic amine, the maleic anhydride, and an acidic catalyst. The modifier has multiple reactive functional groups such as a hydroxyl group, a carboxyl group, and a double bond. During the preparation of the modified acrylic resin with the modifier, the reactive functional groups in the modifier are copolymerized with a vinyl group of acrylic acid, thereby increasing degrees of branching and crosslinking of the modified acrylic resin.

Abstract: The storage assembly for isolation clothing capable of being put on and taken off quickly includes: isolation clothing which includes an one-piece integrated protective clothing body, a putting-on and taking-off opening provided in one face of the protective clothing body which has a “” shaped structure similar to a structure of the protective clothing body, and hasps and binding belts which are matched with each other and provided on two sides of the putting-on and taking-off opening; a storage rack which includes: a base plate, a vertical plate perpendicularly arranged on one side of the base plate, and two sets of supporting ribs which are provided on the vertical plate and parallel to the base plate; wherein fixing holes which are arranged at an outer side of each trouser leg and an outer side of each sleeve of the isolation clothing are sleeved on the supporting ribs.

Abstract: The application discloses a dimming control circuit, a dimming control method, and a LED driver circuit. The dimming control circuit comprises a logic signal generation circuit and a feedback signal generation circuit. wherein the logic signal generation circuit is configured to compare the sampling signals with a first threshold signal and a second threshold signal respectively to obtain a first group of logic signals and a second group of logic signals. Wherein the feedback signal generation circuit is coupled to the logic signal generation circuit, which is configured to generate feedback signals to reduce energy output when each of the sampling signals is greater than the first threshold signal, and configured to generate feedback signals to increase the energy output when any one of the sampling signals is smaller than the second threshold signal.

Abstract: The storage assembly for isolation clothing capable of being put on and taken off quickly includes: isolation clothing which includes an one-piece integrated protective clothing body, a putting-on and taking-off opening provided in one face of the protective clothing body which has a “” shaped structure similar to a structure of the protective clothing body, and hasps and binding belts which are matched with each other and provided on two sides of the putting-on and taking-off opening; a storage rack which includes: a base plate, a vertical plate perpendicularly arranged on one side of the base plate, and two sets of supporting ribs which are provided on the vertical plate and parallel to the base plate; wherein fixing holes which are arranged at an outer side of each trouser leg and an outer side of each sleeve of the isolation clothing are sleeved on the supporting ribs.

Abstract: A method for preparing a SiO2-polyethersulfone conductive ultrafiltration membrane and the ultrafiltration membrane comprises hydrophilic CF cloth as the conductive membrane base, which provides an effective carrier for the preparation of a stable and efficient conductive membrane. After pretreatment, the silica solution was combined with the membrane via film scraping. Then phase catalysis and polymerization of PES onto the film obtained the final silica dioxide-polyethersulfone conductive ultrafiltration membrane. The silica solution was applied in the form of a coating on the hydrophilic CF cloth, in which silicon dioxide combined with the hydrophilic CF cloth, avoiding electrochemical interference. The modified hydrophilic CF cloth improved the hydrophilicity of the conductive film, with silica firmly attaching to PES and improving the stability of the SiO2-polyethersulfone conductive ultrafiltration membrane. After 8 cycles of reuse, the performance of the membrane remained stable.

Abstract: This invention relates to a novel conductive organic membrane-coupled filtration system for the degradation of organic pollutants from wastewater. The system comprises a connected water pump and a reactor. The upper end of the reactor contained a water inlet, and the lower end consisted of a water outlet. A counter electrode and a membrane electrode are fixed on the reactor between the water inlet and water outlet. The counter electrode and membrane electrode constitute a two-electrode system connected to an external potentiostat through metal wires. The membrane electrode is made of carbon-based polyvinylidene fluoride (PVDF) membrane that can be used to enhance the electrochemical separation of small molecules and the removal of organic pollutants.

Abstract: The invention provides an acoustic material structure and an assembly method of the acoustic radiation structure. The acoustic material structure comprises acoustic units which can be attached onto surfaces of acoustic radiation structures. Each acoustic unit comprises a thin sheet, an air cavity between the thin sheet and the surface of the sound radiation structure, and openings penetrating through the acoustic unit with one end connected to the cavity. The openings can reduce the spring effect of the fluid medium in the cavity, so that the acoustic units attached onto the surface of the sound radiation structure can provide low-frequency sound insulation effects. The acoustic unit may also include support bodies, mass blocks, and constraint bodies. The working frequencies of the acoustic unit can be regulated by the support bodies, mass blocks and constraint bodies.

Abstract: A stepless motor driving circuit provides a sinusoidal shaped chopping signal for driving a motor. The driving circuit has: a switch circuit having an input which receives a rectified signal rectified from a sinusoidal AC signal and having a first output and a second output where the motor is coupled between; a synchronizing signal generating circuit which generates a synchronizing signal relating to the sinusoidal AC signal; and a switch driving circuit which selects and chops at least one switch in the switch circuit according to the synchronizing signal, and to form the sinusoidal shaped chopping signal which is corresponding to the sinusoidal AC signal.

Abstract: An article of manufacture for predicting the popularity of media may include at least one processor readable storage medium and instructions stored on the at least one medium. The instructions may be configured to be readable from the at least one medium by at least one processor and may thereby cause the at least one processor to operate so as to determine a publication time associated with digital media, set a predetermined time threshold based on the publication time, analyze the digital media to determine at least one feature associated with the digital media, compile the determined at least one feature, predict a popularity associated with the digital media based on the compiled at least one feature, and output the predicted popularity. The at least one feature associated with the digital media may be determined before the predetermined time threshold.

Abstract: A provider network may implement dynamic port bandwidth for dedicated physical connections to the provider network. A dedicated physical connection to the provider network may be established with a reserved port bandwidth according to which a client network may access resources implemented in the provider network. Utilization of the reserved port bandwidth for the dedicated physical connection may be monitored. A bandwidth modification event may be detected, and in response to detecting the bandwidth modification event, provider network routing may be modified to modify the reserved port bandwidth for the dedicated physical connection to the provider network. The resources in the provider network may then be accessed according to the adjusted reserved port bandwidth.

Abstract: The present application discloses a method for controlling fingerprint acquisition based on a display screen and a related apparatus, which are applied to a display screen with a fingerprint acquisition function. In the disclosure, by detecting a fingerprint acquisition triggering instruction generated in an electronic device in real time, a preset fingerprint acquisition region of the display screen is controlled to emit light and a fingerprint sensor is triggered to acquire a fingerprint image, if and only if the fingerprint acquisition triggering instruction is detected. When the fingerprint acquisition triggering instruction does not exist, the display screen is not affected and the fingerprint sensor is in a non-operating state so as to save energy.

Abstract: A stepless motor driving circuit provides a sinusoidal shaped chopping signal for driving a motor. The driving circuit has: a switch circuit having an input which receives a rectified signal rectified from a sinusoidal AC signal and having a first output and a second output where the motor is coupled between; a synchronizing signal generating circuit which generates a synchronizing signal relating to the sinusoidal AC signal; and a switch driving circuit which selects and chops at least one switch in the switch circuit according to the synchronizing signal, and to form the sinusoidal shaped chopping signal which is corresponding to the sinusoidal AC signal.

Abstract: The present disclosure provides an isolation and restoration method for compound contaminated soil. The isolation and restoration method for the compound contaminated soil provided by the present disclosure is used for isolation and restoration of a contaminated site, which includes: laying an isolation layer, a pure soil layer and an arable soil layer containing compound soil in turn on the contaminated site which is flattened and compacted, where the compound soil is composed of loess, slaked lime, fine sand and substances having an adsorption function in a volume ratio.