Abstract: An experimental device and method for supercritical CO2/H2O mixed fluid huff and puff for shale oil development includes a CO2 storage tank, a water vapor generator, a mixing vessel, and a core holder; the CO2 storage tank and the water vapor generator are in communication with the mixing vessel; a first pressure gauge and a hygronom are connected to an upper end of the mixing vessel, and a displacement pump is connected to a lower end of the mixing vessel; the mixing vessel is connected to an inlet end of the core holder; the core holder is connected to an inlet end of a drying pipe, and the measuring cylinder is disposed upside down in a liquid containing dish, where the liquid containing dish and the measuring cylinder are filled with a saturated sodium carbonate solution.

Abstract: The present disclosure discloses a method for automatically identifying south troughs by improved Laplace and relates to the technical field of meteorology. The method includes the following steps: acquiring grid data of a geopotential height field; calculating a gradient field of the geopotential height field in an x direction; searching for a turning point where a gradient value turned from being negative to being positive, and cleaning the gradient field; calculating a divergence of the x direction to obtain an improved Laplacian numerical value L?; performing 0,1 binarization processing on the L? to obtain a black-and-white image and a plurality of targets of potential troughs, merging the black-and-white image and the plurality of targets of the potential troughs by expansion, recovering original scale through erosion, and selecting an effective target through an angle of direction of a contour and an axial ratio.

Abstract: Disclosed in the present disclosure are a surface-acoustic-wave temperature and pressure sensing device and a manufacturing method thereof.

Abstract: The present disclosure discloses a surface acoustic wave temperature sensor and a manufacturing method thereof. The surface acoustic wave temperature sensor includes a sensing module and an antenna module electrically connected to each other. The antenna module includes a first high-temperature-resistant substrate and a patterned antenna formed on a surface of the first high-temperature-resistant substrate, a recess is formed in a first surface of the first high-temperature-resistant substrate, and the sensing module is fixed in the recess. The sensing module and the antenna module of the surface acoustic wave temperature sensor provided by the present disclosure form a whole. Therefore, compared with the prior art, the volume is greatly reduced, and wireless passive temperature monitoring in a high-temperature and narrow space can be better implemented. Moreover, the sensing module can be integrated in the antenna module, and such a structure is more convenient for batch processing.

Abstract: Provided are an ion thruster and a fabrication method thereof. The method for fabricating the ion thruster comprises: stacking and laminating a plurality of prefabricated ceramic chips (p) to form a front portion (51); stacking and laminating a plurality of prefabricated green ceramic chips (p) to form a rear portion (B); assembling the front portion (51) and the rear portion (B) and placing in a sintering mold, and allowing the front portion (51) to be closely fitted with a tapered portion (b1) of the rear portion (B); placing a main cathode (1) into a cathode hole (k1) on the front portion and filling the cathode hole (k1) with a ceramic slurry to fix the main cathode (1); and placing the sintering mold in a heating furnace for sintering. For the ion thruster, a modular processing method is adopted. A method of stacking a plurality of prefabricated green ceramic chips (p) together and laminating them is used when each module is manufactured.

Abstract: Disclosed is a method for galvanizing a steel member of a support for a solar photovoltaic or photothermal system, which relates to metal surface treatment. The method includes: subjecting the steel member to phosphorus-free degreasing and then pickling; dipping the steel member in a flux solution; drying the steel member; and subjecting the steel member to hot-dip galvanization, cooling and passivation to produce galvanized steel member.

Abstract: A 3D bio-printer capable of detecting cell activity is provided. The 3D bio-printer includes an upper PC and a lower 3D printer. A conveying hose is connected to a printhead base of the printer, and a temperature controller is connected to the conveying hose. A printhead controller is connected to the other end of the conveying hose, a printhead is connected to the bottom of the printhead controller, and a main control cabinet controls the printhead to work via a signal generator. A prototyping table is provided under the printhead and is connected with a cell activity detecting device for detecting activity of a printed product. Cell activity can be detected in the process of printing, which ensures that the printed biological tissues maintain biological activity. It can supply multi-biological raw materials and realize multi-biological material printing, which ensures an environment suitable for biological material printing.

Abstract: A 3D bio-printer capable of detecting cell activity is provided. The 3D bio-printer includes an upper PC and a lower 3D printer. A conveying hose is connected to a printhead base of the printer, and a temperature controller is connected to the conveying hose. A printhead controller is connected to the other end of the conveying hose, a printhead is connected to the bottom of the printhead controller, and a main control cabinet controls the printhead to work via a signal generator. A prototyping table is provided under the printhead and is connected with a cell activity detecting device for detecting activity of a printed product. Cell activity can be detected in the process of printing, which ensures that the printed biological tissues maintain biological activity. It can supply multi-biological raw materials and realize multi-biological material printing, which ensures an environment suitable for biological material printing.

Abstract: A printhead device is provided. The printhead device includes a cell tube, a cell tube rubber plug covering the cell tube, a connector arranged at an end of the cell tube, and a fixing knob fixed to the connector and communicating with a printing nozzle through a bottom liquid tube. A fixing clip is provided on the upper part of the cell tube, and a stepping motor box is provided on the upper end of the fixing clip. An air valve box is arranged on the upper side of the stepping motor box, and a rotary air valve is provided in the air valve box. The rotary air valve communicates with the inner cavity of the cell tube through an internal vent tube, and with an air valve straight tube or an air valve gooseneck tube.

Abstract: The present disclosure relates to the technical field of wireless network communications, and provides a method, system and client for uploading an image, a network server and a computer storage medium. The method includes: a client determines an image to be uploaded, generates a unique image identifier corresponding to the image to be uploaded, and transmits an image detection request to a network server; the network server detects whether there is an image having the same image identifier in the network server according to the image identifier included in the image detection request, and returns a detection result to the client; when the detection result is that there is not an image having the same image identifier in the network server, the client uploads the image to be uploaded in the form of multi-part uploading to the network server; and after the image to be uploaded is uploaded successfully, the network server records the image identifier, and returns an upload success response to the client.

Abstract: A PM2.5 measurement device is provided, including a housing, a light scattering sensor, and an electrical heating unit. The light scattering sensor is arranged in the housing and has an inlet, and the electrical heating unit is arranged between an inlet of the housing and the inlet of the light scattering sensor.

Abstract: A method and device for controlling operation of sensor in air purifier are provided, to solve technical problem that operating life of sensor is shortened when air quality is detected by sensor in real-time manner since sensor needs to operate whether air quality changes or not. The method for controlling operation of sensor in air purifier includes: obtaining current time period; determining operating mode of sensor based on current time period, and controlling, if time period is daytime period, the sensor to operate continuously for first preset operating period and stop operating for first preset power-down period to perform a periodic control for first preset number of cycles per hour; and controlling, if the time period is nighttime period, the sensor to operate continuously for second preset operating period and stopping operating for second preset power-down period to perform periodic control for second preset number of cycles per hour.

Abstract: A method and device for controlling operation of sensor in air purifier are provided, to solve technical problem that operating life of sensor is shortened when air quality is detected by sensor in real-time manner since sensor needs to operate whether air quality changes or not. The method for controlling operation of sensor in air purifier includes: obtaining current time period; determining operating mode of sensor based on current time period, and controlling, if time period is daytime period, the sensor to operate continuously for first preset operating period and stop operating for first preset power-down period to perform a periodic control for first preset number of cycles per hour; and controlling, if the time period is nighttime period, the sensor to operate continuously for second preset operating period and stopping operating for second preset power-down period to perform periodic control for second preset number of cycles per hour.

Abstract: The present invention discloses a portable solar cooker, belonging to the field of solar heat utilization. The solar cooker comprises an upper functional assembly, a lower control assembly and a rotary apparatus which are sequentially connected, wherein the upper functional assembly is configured to reflect sunlight, collect heat in a focusing manner and further heat water or foods, the upper functional assembly is closed to form a box body when being in a non-operative state, and the upper functional assembly is opened when being in an operative state; the lower control assembly is connected with the upper functional assembly, and makes the upper functional assembly be subjected to pitch adjustment; the lower control assembly is connected with the rotary apparatus, and the lower control assembly and the upper functional assembly are driven by the rotary apparatus to rotate so that tracking the sun is realized.

Abstract: The invention discloses a silicon-based monolithic integrated sonar array which includes a cantilevered sensing array structure, a sound-transparent jacket, and a support structure. The cantilevered sensing array structure is fixed on the support structure and in the sound-transparent jacket, wherein the sound-transparent jacket is filled with insulating dielectric oil, and the cantilevered sensing array structure is immersed in the insulating dielectric oil. The sound-transparent jacket is sealed and is treated with water tightness processing. The array can be applied into devices for underwater ultrasonic imaging, ultrasonic ranging, torpedo navigating, etc.

Abstract: Various systems and method for distributing electrical power are provided. In one embodiment, a system includes a first inverter coupled to an electrical bus, a second inverter coupled to the electrical bus, a filter including a first inductor and a second inductor, and a transfer switch circuit coupled between the first inverter and the second inverter and a load. The transfer switch circuit is configured to transfer power from the first inverter through the first inductor to the load and transfer power from the second inverter through the second inductor to the load in a first mode of operation. The transfer switch circuit is further configured to transfer power from the first inverter through the first inductor and through the second inductor to the load in a second mode of operation.

Abstract: The present invention discloses a portable solar cooker, belonging to the field of solar heat utilization. The solar cooker comprises an upper functional assembly, a lower control assembly and a rotary apparatus which are sequentially connected, wherein the upper functional assembly is configured to reflect sunlight, collect heat in a focusing manner and further heat water or foods, the upper functional assembly is closed to form a box body when being in a non-operative state, and the upper functional assembly is opened when being in an operative state; the lower control assembly is connected with the upper functional assembly, and makes the upper functional assembly be subjected to pitch adjustment; the lower control assembly is connected with the rotary apparatus, and the lower control assembly and the upper functional assembly are driven by the rotary apparatus to rotate so that tracking the sun is realized.

Abstract: The present disclosure relates to the technical field of wireless network communications, and provides a method, system and client for uploading an image, a network server and a computer storage medium. The method includes: a client determines an image to be uploaded, generates a unique image identifier corresponding to the image to be uploaded, and transmits an image detection request to a network server; the network server detects whether there is an image having the same image identifier in the network server according to the image identifier included in the image detection request, and returns a detection result to the client; when the detection result is that there is not an image having the same image identifier in the network server, the client uploads the image to be uploaded in the form of multi-part uploading to the network server; and after the image to be uploaded is uploaded successfully, the network server records the image identifier, and returns an upload success response to the client.

Abstract: Various systems and method for distributing electrical power are provided. In one embodiment, a system includes a first inverter coupled to an electrical bus, a second inverter coupled to the electrical bus, a filter including a first inductor and a second inductor, and a transfer switch circuit coupled between the first inverter and the second inverter and a load. The transfer switch circuit is configured to transfer power from the first inverter through the first inductor to the load and transfer power from the second inverter through the second inductor to the load in a first mode of operation. The transfer switch circuit is further configured to transfer power from the first inverter through the first inductor and through the second inductor to the load in a second mode of operation.

Abstract: The invention discloses a silicon-based monolithic integrated sonar array which includes a cantilevered sensing array structure, a sound-transparent jacket, and a support structure. The cantilevered sensing array structure is fixed on the support structure and in the sound-transparent jacket, wherein the sound-transparent jacket is filled with insulating dielectric oil, and the cantilevered sensing array structure is immersed in the insulating dielectric oil. The sound-transparent jacket is sealed and is treated with water tightness processing. The array can be applied, into devices for underwater ultrasonic imaging, ultrasonic ranging, torpedo navigating, etc.