Abstract: A method for determining ciprofloxacin in a meat product based on an enzyme-linked upconversion fluorescence and potassium titanium oxalate system is provided. An enzyme-linked upconversion nanoparticle solution is mixed with an aptamer-bound magnetized polydopamine solution to obtain a fluorescence-ultraviolet dual-signal detection system. A fluorescence standard curve and a colorimetric standard curve for the ciprofloxacin content determination are created through the fluorescence-ultraviolet dual-signal detection system in combination with potassium titanium oxalate and hydrogen peroxide. A fluorescence intensity signal characteristic value and an ultraviolet absorbance signal characteristic value of a meat sample solution are determined. A ciprofloxacin content in the meat sample is calculated according to the fluorescence standard curve and the colorimetric standard curve.

Abstract: A release device and a printing apparatus are provided. The release device includes: a fixing member, a release film, a support plate, a soft rubber ring and an exhaust device. The fixing member is arranged to be fixed to the release film. The soft rubber ring is arranged between the release film and the support plate at edges of the release film and the support plate. A cavity is enclosed by the release film, the support plate, and the soft rubber ring together. The support plate is provided with a first through hole through which the exhaust device is in communication with the cavity. In this way, air in the cavity can be exhausted by the exhaust device, the release film can be attached downward to the support plate, a printing model can thus be smoothly released from the release film.

Abstract: The use of browser context in detecting malware is disclosed. A client device requests content from a remote server. Data received by the client device from the remote server is transmitted to an external scanner for analysis by the external scanner. The external scanner is configured to use a browser executed in an instrumented virtual machine environment to analyze the data provided by the client device. The client device is configured to request the content from the remote server using a browser extension configured to retrieve data and provide the retrieved data to the external scanner without rendering the retrieved data.

Abstract: A print head switching assembly includes a support assembly, a drive assembly, a first print head, and a second print head. The drive assembly is arranged on the support assembly, the first print head is arranged at a first end of a first connecting member, and the second print head is arranged at a first end of a second connecting member. When the first print head is in an operating state, the second connecting member, driven by a drive member, moves the second print head to a target position, such that the distance between the second print head and a print object is greater than the distance between the first print head and the print object. The second print head is driven to a target position by means of the drive assembly prevents the print head from scraping the print object when pausing to print.

Abstract: A three-dimensional printing device includes a cantilever, a platform, and a leveling device. The leveling device includes a connecting piece and an adjuster. A first end of the connector is provided with a spherical connecting part, and a second end of the connector is detachably connected to the platform. The side of the cantilever adjacent to the connector is recessed inwards to form a accommodating cavity, and the spherical connecting part is accommodated in the accommodating cavity. The adjuster is configured to move between a first position and a second position. In the first position, the adjuster passes through the connector and is fixedly connected to the cantilever, thus the platform is fixed to the cantilever by the leveling device. In the second position, the adjuster is separated from the cantilever, the platform can be rotatably connected to the cantilever by the leveling device.

Abstract: A printing device includes a main control board, a resin vat, a vibration generating assembly, a detection assembly and a support plate. The vibration generating assembly includes a drive component and a paddle. A drive end of the drive component is connected to the paddle, and the drive end is configured to drive the paddle to vibrate. The detection assembly includes an elastic sheet, a resistance strain gage and a detection circuit. The resistance strain gage is attached to the elastic sheet, a first end of the elastic sheet is arranged on the first face of the support plate, and a second end of the elastic sheet extends into the liquid to be detected. The detection circuit is configured to determine an output voltage according to a resistance value of the resistance strain gage. Automatic detection of the liquid level depth of the liquid to be detected is achieving.

Abstract: A feeding device and a 3D printer are provided. The feeding device includes a first connecting pipe, a second connecting pipe, a feeding power unit, a temperature adjusting device and a resin vat containing a resin liquid. The temperature adjusting device includes a heat exchange pipeline, a liquid intake end of the heat exchange pipeline is connected to a first end of the first connecting pipe, a liquid output end of the heat exchange pipeline is connected to a first end of the second connecting pipe, a second end of the first connecting pipe and a second end of the second connecting pipe are both located in the resin vat, and at least one of the first connecting pipe and the second connecting pipe is provided with the feeding power unit.

Abstract: Disclosed are a feeding device and a 3D printing apparatus. The feeding device includes a resin vat, a driving device and a conveying device. The driving device is connected to the resin vat, the driving device is connected to a container filled with a resin liquid through the conveying device, and the interior of the container is further in communication with the resin vat through the conveying device. When the height of the resin liquid inside the resin vat is lower than a first preset height, the driving device inputs gas into the container through the conveying device, such that the resin liquid inside the container is conveyed into the resin vat through the conveying device, thereby achieving automatic feeding to avoid a model printing failure due to lack of the resin liquid.

Abstract: Techniques for providing an intelligent-interaction honeypot for IoT devices in accordance with some embodiments. In some embodiments, a system/process/computer program product for providing an intelligent-interaction honeypot for IoT devices includes receiving a request from an attacker sent to an IP address that is associated with a honeypot instance for Internet of Things (IoT) devices; determining a response to the request using a data store that stores a plurality of responses and associated IoT device information, wherein the plurality of responses and associated IoT device information is generated based on automated machine learning of active probing of physical IoT devices on the Internet; and sending the response from the honeypot instance for IoT devices to the attacker, wherein the attacker is unable to detect that the response is associated with an emulated IoT device.

Abstract: A light homogenization method for an LCD photocuring 3D printer, including: obtaining the initial grayscale value of a pixel in image data to be printed; obtaining a preset light homogenization compensation value, and calculating the difference between the preset light homogenization compensation value and the initial grayscale value, to obtain a target grayscale value; and controlling the LCD to perform, according to the target grayscale value, photocuring printing on the image data to be printed. The method can solve the problem of uneven exposure in photocuring 3D printing in the prior art, and improve the printing quality. A light homogenization apparatus for an LCD photocuring 3D printer, and a printer are correspondingly provided.

Abstract: The use of browser context in detecting malware is disclosed. A client device requests content from a remote server. Data received by the client device from the remote server is transmitted to an external scanner for analysis by the external scanner. The external scanner is configured to use a browser executed in an instrumented virtual machine environment to analyze the data provided by the client device. The client device is configured to request the content from the remote server using a browser extension configured to retrieve data and provide the retrieved data to the external scanner without rendering the retrieved data.

Abstract: The use of browser context in detecting malware is disclosed. A client device requests content from a remote server. Data received by the client device from the remote server is transmitted to an external scanner for analysis by the external scanner. The external scanner is configured to use a browser executed in an instrumented virtual machine environment to analyze the data provided by the client device. The client device is configured to act as a proxy on behalf of the external scanner.

Abstract: A printing device includes a main control board, a resin vat, a vibration generating assembly, a detection assembly and a support plate. The vibration generating assembly includes a drive component and a paddle. A drive end of the drive component is connected to the paddle, and the drive end is configured to drive the paddle to vibrate. The detection assembly includes an elastic sheet, a resistance strain gage and a detection circuit. The resistance strain gage is attached to the elastic sheet, a first end of the elastic sheet is arranged on the first face of the support plate, and a second end of the elastic sheet extends into the liquid to be detected. The detection circuit is configured to determine an output voltage according to a resistance value of the resistance strain gage. Automatic detection of the liquid level depth of the liquid to be detected is achieving.

Abstract: Disclosed are a feeding device and a 3D printing apparatus. The feeding device includes a resin vat, a driving device and a conveying device. The driving device is connected to the resin vat, the driving device is connected to a container filled with a resin liquid through the conveying device, and the interior of the container is further in communication with the resin vat through the conveying device. When the height of the resin liquid inside the resin vat is lower than a first preset height, the driving device inputs gas into the container through the conveying device, such that the resin liquid inside the container is conveyed into the resin vat through the conveying device, thereby achieving automatic feeding to avoid a model printing failure due to lack of the resin liquid.

Abstract: A release device and a printing apparatus are provided. The release device includes: a fixing member, a release film, a support plate, a soft rubber ring and an exhaust device. The fixing member is arranged to be fixed to the release film. The soft rubber ring is arranged between the release film and the support plate at edges of the release film and the support plate. A cavity is enclosed by the release film, the support plate, and the soft rubber ring together. The support plate is provided with a first through hole through which the exhaust device is in communication with the cavity. In this way, air in the cavity can be exhausted by the exhaust device, the release film can be attached downward to the support plate, a printing model can thus be smoothly released from the release film.

Abstract: A feeding device and a 3D printer are provided. The feeding device includes a first connecting pipe, a second connecting pipe, a feeding power unit, a temperature adjusting device and a resin vat containing a resin liquid. The temperature adjusting device includes a heat exchange pipeline, a liquid intake end of the heat exchange pipeline is connected to a first end of the first connecting pipe, a liquid output end of the heat exchange pipeline is connected to a first end of the second connecting pipe, a second end of the first connecting pipe and a second end of the second connecting pipe are both located in the resin vat, and at least one of the first connecting pipe and the second connecting pipe is provided with the feeding power unit.

Abstract: Techniques for providing an intelligent-interaction honeypot for IoT devices in accordance with some embodiments. In some embodiments, a system/process/computer program product for providing an intelligent-interaction honeypot for IoT devices includes receiving a request from an attacker sent to an IP address that is associated with a honeypot instance for Internet of Things (IoT) devices; determining a response to the request using a data store that stores a plurality of responses and associated IoT device information, wherein the plurality of responses and associated IoT device information is generated based on automated machine learning of active probing of physical IoT devices on the Internet; and sending the response from the honeypot instance for IoT devices to the attacker, wherein the attacker is unable to detect that the response is associated with an emulated IoT device.

Abstract: Techniques for Domain Generation Algorithm (DGA) behavior detection are provided. In some embodiments, a system, process, and/or computer program product for DGA behavior detection includes receiving passive Domain Name System (DNS) data that comprises a plurality of DNS responses at a security device; and applying a signature to the passive DNS data to detect DGA behavior, in which applying the signature to the passive DNS data to detect DGA behavior further comprises: parsing each of the plurality of DNS responses to determine whether one or more of the plurality of DNS responses correspond to a non-existent domain (NXDOMAIN) response.