Abstract: The preparation device includes an upper main conveyor belt, and an aggregate box, a first silane emulsion container and a first paper mill sludge container sequentially arranged above the upper main conveyor belt in a conveying direction. A lower auxiliary conveyor belt is arranged below the upper main conveyor belt, and a second paper mill sludge container and a second silane emulsion container are sequentially arranged between the upper main conveyor belt and the lower auxiliary conveyor belt in a conveying direction of the lower auxiliary conveyor belt. A trolley is arranged at the conveying tail end of the lower auxiliary conveyor belt, a gravity sensing device is arranged below the trolley, a mixer is arranged beside the trolley, and a heater is arranged at the bottom of the mixer.

Abstract: Disclosed is a transient-state THz spectrometer applied to cells and biological macromolecules, including a femtosecond laser amplifier. A femtosecond laser output by the femtosecond laser amplifier is divided into two beams of pump light and probe light after passing through a beam splitter of which a transmission-reflection ratio is 7:3, the pump light is focused to irradiate a gap between electrodes of a nonlinear photoconductive antenna and emit a terahertz wave after successively passing through a half wave plate, a silver-plated reflector and a first lens, the terahertz wave forms a terahertz wave collineation after successively passing through a second lens, a slab waveguide, a third lens and an ITO film, the terahertz wave collineation and the probe light form a probe light collineation of wavefront tilt which is perpendicularly incident on a ZnTe crystal and detected and recorded by using a CCD camera.

Abstract: The present invention discloses a determination method for a preferred habitat of fish and a terminal device, wherein the method comprises: acquiring parameter information of a water environment in which target fish is located, and establishing a 3D water environment model by utilizing the parameter information of the water environment; determining an ecological function of the target fish and constructing a bio-simulation model on the 3D water environment model by combining the ecological function; acquiring a movement locus of the target fish in the bio-simulation model and determining potential habitats of the target fish according to the movement locus; and determining the preferred habitat of the target fish from the potential habitats by utilizing a preference learning model based on a density accumulation method.

Abstract: This invention discloses a boron-containing titanium-based composite powder for 3D printing, consisting of 0.5%-2% by weight of titanium diboride and 98%-99.5% by weight of titanium sponge. The invention further discloses a method of preparing such composite powder, where the element boron is introduced to the titanium powder through rapid solidification, which significantly improves the solid solubility of boron in Ti, enabling the introduction of part of the boron into the titanium matrix to form supersaturated solid solutions. The reinforcement phase TiB in the boron-containing titanium-based composite powder prepared herein can be precisely controlled in grain size ranging from the nanometer scale to the micrometer scale through temperature or energy density, thereby preparing the titanium-based composite materials with different sizes of reinforcement phases to meet different mechanical requirements.

Abstract: The present invention discloses a determination method for a preferred habitat of fish and a terminal device, wherein the method comprises: acquiring parameter information of a water environment in which target fish is located, and establishing a 3D water environment model by utilizing the parameter information of the water environment; determining an ecological function of the target fish and constructing a bio-simulation model on the 3D water environment model by combining the ecological function; acquiring a movement locus of the target fish in the bio-simulation model and determining potential habitats of the target fish according to the movement locus; and determining the preferred habitat of the target fish from the potential habitats by utilizing a preference learning model based on a density accumulation method.

Abstract: a chaotic shape-forming and corresponding matched filter-based wireless communication method is provided, and the method includes that: 1) data to be transmitted is prepared; 2) chaotic shape-forming filter is performed on a digital symbol to be transmitted to generate a baseband signal; 3) the baseband signal is transmitted and transferred by use of a radio frequency component and transmitting antenna of a conventional wireless communication system; 4) a wireless signal is received by use of a conventional receiving antenna, and down-carrier process is performed on the received signal to obtain a received baseband signal; 5) matched filter is performed on the received baseband signal; 6) wireless channel estimation and multipath interference cancellation judgment threshold calculation are performed; and 7) sampling judgment is performed on an output signal of matched filter, symbol sampling is performed on the output signal of the matched filter in Step 5), and the sampled signal is judged by use of a judgme

Abstract: A variable-size fully-automatic 3D printing system based on a cylindrical coordinate system includes a base provided with a retractable work platform; the base is provided with a vertical support side plate on a side thereof; an upper end of the support side plate is connected to a top plate, and the top plate is located directly above the base; a lower side of the top plate is connected to a sleeve via a column seat; a lower end of the sleeve is provided with a protrusion; a lower end of the protrusion is connected with a cross beam; a lower side of the cross beam is provided with a ball screw a, one end of the ball screw a is connected to a power end of a first servo motor disposed at an outer end of the cross beam.

Abstract: A self-lubricating rolling bearing is provided. The chemical compositions in the inner rings and the outer rings of bearing are 3.4-3.7% C, 2.7-2.9% Si, 0.3-0.5% Mn, 0.3-0.5% Cr, ?0.05% S, ?0.05% P, 0.03-0.045% Residual Mg, and the remainder Fe. The total percent of the chemical compositions is 100%. The material for the inner and outer rings of the rolling bearing introduced in the invention is austempered ductile iron (ADI). In the microstructure of ADI, the diameter of the graphite nodules is less than 0.02 mm, the number of graphite spheres per square millimeter is more than 400, and the microstructure of the metal matrix in the ADI can be showed clearly only when it is observed on the microscope with a magnification more than 500. Eventually, the self-lubricating rolling bearings are made from the ADI.

Abstract: A communication method for phase separation differential chaos shift keying (DCSK) based on a second order hybrid system (SOHS) is provided. The method includes the following steps. At Step 1: communication system parameters are set. At Step 2: binary information to be transmitted are prepared. At Step 3: the chaotic signal u(t) is generated. At Step 4: the chaotic signal is prepared to be transmitted. At Step 5: a received signal is demodulated. At Step 6: a chaotic matched filtering operation is performed on the demodulated reference signal and the demodulated information bearing signal. At Step 7: optimal signal to noise ratio (SNR) points are extracted in a sampling way. At Step 8: polarity of each symbol is determined to obtain a recovered signal.

Abstract: The present disclosure discloses an M-ary DCSK method based on chaotic shape-forming filtering. The method includes the following steps: at S1, parameters of a communication system are set; at S2, HP information and LP information to be sent in each time slot are prepared; at S3, the information to be sent is modulated; at S4, a chaotic carrier is generated through a chaotic shape-forming filter; at S5, a transmitted signal is prepared; at S6, down-carrier frequency and matched filter is performed to a received signal; at S7, the sampling of a maximum SNR point is performed to an output signal of a matched filter; at S8, the decision of high priority information bits is resumed; and at S9, the decision of low priority information bits is resumed.

Abstract: The present invention relates to carbon nanotubes and a preparation method thereof by using PET. The carbon nanotubes of the present invention are prepared by processes of alcoholysis of PET materials, processes of washing, crushing and calcining unreacted intermediates and so on. By the preparation method of the present invention, multi-walled carbon nanotubes prepared by using waste PET have a good conductivity, and are a structure of top-down array with low aspect ratio. The method of the present invention is not only easy to implement, but also does not need a catalyst, and turns the waste PET into treasure, which solves the problem of environmental pollution caused by the increasingly serious waste PET. FIG. 9.

Abstract: A system and a method for measuring the focus position of high-power laser are disclosed. The system includes a micro-controller, a stepping motor driver, an electric lifting platform, an electric rotation platform, a metal target, a displacement sensor, a photoelectric sensor and an ADC module. The system uses a laser to irradiate the metal target, which is moved upward and downward, to obtain the best ablation point through the ultraviolet radiation emitted on it.

Abstract: A cloud water resource detecting system and method, the system includes computing device, and Raman lidar, microwave radiometer, millimeter wave cloud radar, wind profile radar and Doppler wind lidar in communication connection with the computing device. The Raman lidar and the microwave radiometer are configured to obtain temperature and humidity data of a cloud system. The millimeter wave cloud radar and the microwave radiometer are configured to obtain cloud water content profiles. The wind profile radar is configured to obtain a horizontal wind speed of the cloud system. The Doppler wind lidar is configured to obtain the vertical motion speed of a cloud bottom. The computing device is configured to calculate the total amount of cloud water according to the temperature and humidity data of the cloud system, the cloud water content profiles, the horizontal wind speed of the cloud system and the vertical motion speed of the cloud bottom.

Abstract: A variable-size fully-automatic 3D printing system based on a cylindrical coordinate system includes a base provided with a retractable work platform; the base is provided with a vertical support side plate on a side thereof; an upper end of the support side plate is connected to a top plate, and the top plate is located directly above the base; a lower side of the top plate is connected to a sleeve via a column seat; a lower end of the sleeve is provided with a protrusion; a lower end of the protrusion is connected with a cross beam; a lower side of the cross beam is provided with a ball screw a, one end of the ball screw a is connected to a power end of a first servo motor disposed at an outer end of the cross beam.

Abstract: A method of realizing single direction chaotic rotation speed of permanent magnet synchronous motor is provided powered by a three-phase full-bridge inverter.

Abstract: A method of realizing single direction chaotic rotation speed of permanent magnet synchronous motor is provided powered by a three-phase full-bridge inverter.

Abstract: This present invention provides a novel photoconductive semiconductor switch (PCSS) comprising: a semi-insulating substrate, an anode formed on the upper surface of said semi-insulating substrate, a first n-type doped layer formed on the lower surface of said semi-insulating substrate, a p-type doped layer formed on said first n-type doped layer, a second n-type doped layer formed on said p-type doped layer, a cathode formed on said second n-type doped layer, several recesses facing towards said first n-type doped layer and vertically extending into a part of said first n-type doped layer, an insulating layer formed on said second n-type doped layer and on the walls and the bottoms of said recesses, a gate electrode consisting of two parts, one part of the which formed on said insulating layer on the walls and the bottoms of recesses, and the other part of the which formed on a part of the insulating layer on the second n-type doped layer for electrically connecting the part of the gate electrode on the reces

Abstract: This present invention provides a novel photoconductive semiconductor switch (PCSS) comprising: a semi-insulating substrate, an anode formed on the upper surface of said semi-insulating substrate, a first n-type doped layer formed on the lower surface of said semi-insulating substrate, a p-type doped layer formed on said first n-type doped layer, a second n-type doped layer formed on said p-type doped layer, a cathode formed on said second n-type doped layer, several recesses facing towards said first n-type doped layer and vertically extending into a part of said first n-type doped layer, an insulating layer formed on said second n-type doped layer and on the walls and the bottoms of said recesses, a gate electrode consisting of two parts, one part of the which formed on said insulating layer on the walls and the bottoms of recesses, and the other part of the which formed on a part of the insulating layer on the second n-type doped layer for electrically connecting the part of the gate electrode on the reces

Abstract: A serially-connected ball screw pair and piezoelectric actuator macro-micro driving and guiding device includes, from the bottom to the top, a sliding seat (1), a ball screw pair, a sliding table guide rail pairs, a nut seat (6), a piezoelectric actuator (7), a micro-moving table, a nut seat guide rail pairs and a sliding table (1). The axis of a ball screw is symmetric with respect to two sliding table rail pairs, a nut (3) of the ball screw pair is fixedly mounted into the nut seat (6), one end of the piezoelectric actuator (7) is fixedly connected with the nut seat (6) and the other end thereof is fixedly connected with the micro-moving table (8), the axis of the piezoelectric actuator is symmetric relative to two sliding table rail pairs, an upper surface of the micro-moving table is fixedly mounted to a lower surface of the sliding table, and two nut rail pairs are symmetric relative to the axis of the ball screw.

Abstract: A device and a method for testing the rigidity and non-linear relationship of the coupling interface for cylindrical fitting including an axial loading assembly which is provided along a horizontal central line within a side wall of a frame test bench and contacting with the test-piece shaft via a steel ball, a radial loading assembly downward provided along a vertical central line of top board of the frame test bench, a tip of a perpendicular loading part of the radial loading assembly extending into the outer housing of the test-piece housing fixed on an upper plane of a bottom wall of the frame test bench, with the test-piece shaft and the test-piece housing fitted and connected to each other via a coupling interface for cylindrical fitting; a plurality of displacement sensors fixed on the test-piece housing, and test heads of respective displacement sensor assembly aiming at the test-piece shaft.