Abstract: Provided are a zeolite-like molecular sieve membrane for removing fluorine and chlorine from waste acid and a preparation method thereof. The molecular sieve membrane includes a dispersed phase and a continuous phase, where the dispersed phase is zeolite-like molecular sieve nanoparticles, and the continuous phase is prepared by dissolving and then polymerizing PVDF (polyvinylidene fluoride) monomer particles. The zeolite-like molecular sieve nanoparticles are prepared by dissolving a metal compound in a first solvent under an ultrasonic environment, and then dissolving in a second solvent to obtain a mixed solution I, and drying. The preparation method includes steps of preparing a PVDF molecular sieve blend membrane by blending and surface coating modification of the PVDF molecular sieve blend membrane.

Abstract: A tunnel constraint anchor cable and a method for improving stability of an initial support structure. The tunnel constraint anchor cable comprises steel strands (1) anchored in surrounding rock, first anchor plates (2) and first anchorage devices (3) which are installed on the surface of the surrounding rock, longitudinal connection members (5) installed between two adjacent steel ribs (4), and second anchor plates (6) and second anchorage devices (7) which are installed on the longitudinal connection members (5). With the support of the tunnel constraint anchor cable, the ability of the initial support structure to resist self instability and destruction is improved, overall settlement and convergence deformation of the initial support structure can also be suppressed. The method for improving stability of an initial support structure has the characteristics of simplicity, speed, reliability, and avoiding interference with subsequent construction processes of tunnels.

Abstract: The present application provides a method for sending an interference signal, an apparatus for sending an interference signal, an electronic device, and a computer-readable storage medium, the method for sending the interference signal includes: acquiring a power intensity, to be received, of a target signal correctly demodulated in a wireless communication system, the target signal being a signal to be demodulated by a terminal to access the wireless communication system; determining a parameter for sending the interference signal according to the power intensity, to be received, of the target signal correctly demodulated; and sending the interference signal based on the parameter for sending the interference signal, so that the terminal in a target area is unable to correctly demodulate the target signal.

Abstract: Disclosed in the present invention are a cleaning solution for a high-yield-stress ceramic material 3D printing blank, a preparation method therefor and the use thereof. The cleaning solution is composed of a main cleaning agent and an auxiliary cleaning agent, wherein the main cleaning agent is isobornyl acrylate (IBOA), N-acryloylmorpholine (ACMO), hydroxyethyl methacrylate (HEMA), 3-ethyl-3-oxetanemethanol (EHO), or a combination thereof. According to the cleaning solution of the present invention, ultrasonic cleaning or pressure spraying is used, such that the problem of cleaning the high-yield-stress ceramic material 3D printing blank is effectively solved. The present invention is not only simple to clean, but also has a good effect and excellent efficiency.

Abstract: An optical module includes a circuit board having a notch portion and a base. The base is provided thereon with an optical emission component which includes a laser located in the notch portion and configured to output a light not carrying a signal; an optical modulation chip configured to modulate the light to obtain an optical signal; an optical fiber array coupled with the optical modulation chip for transmitting the optical signal; an optical reception component is arranged on one side of the circuit board and includes a light turning member having a reflective end face and an optical reception chip located in a reflective optical path of the reflective end face, or, the optical reception component includes a lens assembly covered on the circuit board and having a reflective surface, and an optical reception chip located in a reflective optical path of the reflective surface.

Abstract: An estuarine wetland sediment column sampling apparatus and method are provided. The estuarine wetland sediment column sampling apparatus includes a controller, a drill and a stabilizing frame; the stabilizing frame includes traction components, a drill lifting passage and a base. The traction components include first linear structures, a second linear structure, and ring-shaped structures arranged on a top of the drill lifting passage, the base, and a top of the drill, respectively. The first linear structures pass through the ring-shaped structure on the top of the drill lifting passage and the ring-shaped structure on the base in sequence and is secured to the base. The drill lifting passage is arranged above the base and capable of passing through the base. The second linear structure tows the drill to lift and fall in the drill lifting passage. Counterweight components are arranged on the base.

Abstract: A gripper, a manipulator, and an experimental device are provided. The gripper includes a fixed seat, a transmission rod, a movable seat, multiple transmission structures, and multiple fingers. The transmission rod is movably connected to the fixed seat. The movable seat is connected to the transmission rod and movable relative to the fixed seat in an axial direction of the transmission rod. The multiple transmission structures are movably connected to both the fixed seat and the movable seat. The multiple transmission structures are arranged at intervals in a circumferential direction of the transmission rod. The multiple fingers are connected to the multiple transmission structures in a one-to-one correspondence. The multiple transmission structures are configured to drive the multiple fingers to move synchronously in a radial direction of the transmission rod under the sequential drive of the transmission rod and the movable seat.

Abstract: The present application relates to a cis-para-substituted cyclohexylaminonitrile salt represented by formula (I), a preparation method therefor and use thereof as an intermediate for preparing a pesticide, and a method for preparing the pesticide by using same as an intermediate. In the formula, R is C1-10 alkyl or C1-10alkyloxy, C2-10 alkenyl or C2-10 alkenyloxy, C2-10 alkynyl or C2-10 alkynyloxy, C3-10 cycloalkyl or C3-10 cycloalkyloxy, C3-10 heterocycloalkyl or C3-10 heterocycloalkyloxy containing 1-2 heteroatoms selected from O and N.

Abstract: An image processing method comprises classifying continuously captured images in an image sequence into a reference frame and a non-reference frame. For a non-reference frame in the image sequence, a semantic feature of a reference frame located before the non-reference frame is reused to predict a semantic feature of the non-reference frame, the semantic feature of the non-reference frame is no longer re-extracted, and then an image segmentation result of the non-reference frame is obtained through prediction based on the semantic feature of the non-reference frame.

Abstract: A shale gas well type classification method includes: S1, acquiring raw data of evaluation parameters for stable production wells and trial production wells; S2, performing standardization on the raw data; S3, calculating distance coefficients; S4, classifying the stable production wells; S5, after determining a class number of the stable production wells, calculating comprehensive evaluation parameters S of the stable production wells based on standardized data; S6, for each class of the stable production wells, calculating average values of standardized data of the evaluation parameters for the stable production wells to construct a standard fuzzy set A, and constructing a to-be-identified fuzzy set B for each of the trial production wells, S7, calculating a closeness degree between each to-be-identified fuzzy set and each standard fuzzy set, and classifying a trial production well corresponding to the to-be-identified fuzzy set into a class of the stable production wells with a highest closeness degree.

Abstract: An automatic grease injection system comprises a host module, a shunting module and a control module; the host module comprises a power device and a grease injection device, in which the power device drives the grease injection device to output sealing grease; the shunting module comprises a control valve and a connecting pipeline, the connecting pipeline comprises a plurality of shunting branch pipes and a grease injection main pipe which are connected to each other, in which the grease injection main pipe is connected to the grease injection device, and each of the shunting branch pipes is connected to a device to be injected with grease, and sealing grease output by the host module is selectively connected to the device to be injected with grease through the shunting module; the control module is to output control signals to the host module and the shunting module.

Abstract: A control system includes: a fracturing control device configured to acquire a target fracturing pressure of a fracturing unit, perform loop control on the fracturing unit by taking the target fracturing pressure as a control target, and set a target sand blending pressure for the sand blending unit; a sand blending control device configured to perform loop control on the sand blending unit by taking the target sand blending pressure as a control target.

Abstract: A method for treating polluted acidic wastewater from smelting with an activated pyrite concentrate includes: drying and grinding a pyrite concentrate, and washing twice to produce a washed pyrite concentrate powder; mixing the washed pyrite concentrate powder with a Na2S powder to produce a mixed powder, and adding purified water; allowing a reaction for 3.5 h to 4.5 h; filtering to produce an activated pyrite concentrate; subjecting the activated pyrite concentrate to aeration and standing, drying, and grinding to produce an activated pyrite concentrate powder; adding a lime slurry to the wastewater to adjust a pH; adding the activated pyrite concentrate powder, and allowing an ultrasonic treatment, continuous stirring is conducted; allowing a settlement to produce a first supernatant; adding a lime slurry to the first supernatant to adjust a pH; further allowing a settlement to produce a second supernatant; and separating the second supernatant.

Abstract: Provided is a method for evaluating a climate regulation value of vegetation, a product, a medium, and a device. The method initially includes obtaining surface net radiations and latent heat fluxes of vegetation and bare land in a window staggered area by a window analysis method. A difference between sensible heat fluxes of the vegetation and the bare land in the window staggered area is calculated according to the surface net radiation and the latent heat fluxes of the vegetation and the bare land in the window staggered area. A climate regulation value of the vegetation is obtained by combining a replacement cost method of cooling by an air conditioner based on the difference between sensible heat fluxes of the vegetation and the bare land in the window staggered area.

Abstract: The present disclosure discloses an optical module including a circuit board and a light-emitting assembly. In the light-emitting assembly, a wavelength tuning mechanism is formed of a semiconductor optical amplification chip, a silicon optical chip and a semiconductor refrigerator. The semiconductor optical amplification chip may provide a plurality of wavelengths, and a wavelength selection is carried out by an optical filter in the silicon optical chip; a temperature adjustment for the optical filter is achieved by the semiconductor refrigerator, so as to further adjust a performance of the filter for wavelength selection. The above device is provided in a housing to facilitate packaging of the devices.

Abstract: Disclosed is a transcatheter delivery system including a catheter assembly and a control handle connected to the proximal end of the catheter assembly. Control handle includes a first handle and multiple sets of driving mechanisms, each set including: a driven member axially mounted to the first handle, slidable along the axial direction, and configured to connect to a corresponding tube; and a driving member rotationally mounted to the first handle, which is located at the periphery of driven member with internal threads. Driven member has driving teeth that engage with the internal threads. Control handle further includes indicator member connected to the driven member and an elastic member connected to the driven member. When elastic member moves axially with driven member to a position corresponding to indicator member, elastic member and indicator member engage with each other to provide a tactile response and/or a sound response.

Abstract: A method for treating polluted acidic wastewater from smelting with an activated pyrite concentrate includes: drying and grinding a pyrite concentrate, and washing twice to produce a washed pyrite concentrate powder; mixing the washed pyrite concentrate powder with a Na2S powder to produce a mixed powder, and adding purified water; allowing a reaction for 3.5 h to 4.5 h; filtering to produce an activated pyrite concentrate; subjecting the activated pyrite concentrate to aeration and standing, drying, and grinding to produce an activated pyrite concentrate powder; adding a lime slurry to the wastewater to adjust a pH; adding the activated pyrite concentrate powder, and allowing an ultrasonic treatment, continuous stirring is conducted; allowing a settlement to produce a first supernatant; adding a lime slurry to the first supernatant to adjust a pH; further allowing a settlement to produce a second supernatant; and separating the second supernatant.

Abstract: A method for restoring waterbird habitats based on the “ecological leverage” theory is provided. The method includes: Step 1: Determining a target waterbird habitat to be restored based on the ecological environment of a target wetland area; Step 2: Selecting several suitable basic ecological units that are distributed in a scattered, circular, or S-shaped pattern from the target wetland area; Step 3: Optimizing the environment of the selected basic ecological units according to the target waterbird habitat; Step 4: Conducting long-term monitoring of the ecological environment and waterbird population of the optimized ecological units, assessing the restoration of the waterbird habitat, and further optimizing the ecological units based on the assessment results. The method of the present invention achieves an enhancement in waterbird diversity within a region with the minimum ecological space and waterbird habitat restoration efforts.

Abstract: An optical module includes a housing, a circuit board, a package, and at least one of a light-emitting assembly or a light receiving assembly. The package includes a package body and a soldering member. The package body includes a cavity. An end of the circuit board is inserted into the cavity, and the soldering member is located in a gap between the circuit board and the package body. The light-emitting assembly or the light receiving assembly is located in the cavity and electrically connected to the circuit board. The light-emitting assembly is configured to convert an electrical signal from the circuit board into an optical signal and emit the optical signal to an outside of the optical module, and the light receiving assembly is configured to convert the optical signal from the outside of the light module into an electric signal and transmit the electric signal to the circuit board.

Abstract: The present disclosure provides an optical module including a circuit board and an optical transceiver assembly. The circuit board is provided with a hollowed-out area. The optical transceiver assembly includes a transceiver base and an optical assembly. The transceiver base includes a base body and a first support protrusion, and the base body is also provided thereon with a second support protrusion and a storage groove. The first support protrusion, the second support protrusion and the storage groove are all engaged with the hollowed-out area. The optical assembly includes a laser chip and a lithium niobate chip. The laser chip is located at a first end of the first support protrusion, and the lithium niobate chip is located at a second end of the first support protrusion. The laser chip is located in the storage groove, and the lithium niobate chip is located on the first support protrusion.