Abstract: An information transmission method based on blockchain, which includes the following steps. A sender creates a transmission contract on a blockchain, submits a digest of to-be-transmitted information to the transmission contract, and sends the ciphertext of the to-be-transmitted information, an address of a receiver and an address of the transmission contract to a first transmission node of a transmission network. The first transmission node sends the ciphertext of the to-be-transmitted information, an address of the receiver and an address of the transmission contract to a second transmission node in a point-to-point manner. The second transmission node receives and delivers the ciphertext of the to-be-transmitted information and the address of the transmission contract to the receiver, and generates and submits a receipt acknowledgement to the transmission contract. This application also provides an information transmission system and device, and a computer-readable storage medium.

Abstract: Disclosed is an oxygen-control freshness preservation refrigerator, comprising a cabinet with a refrigerating compartment and a freezing compartment. A partition plate for separating the refrigerating compartment from the freezing compartment is arranged in the cabinet. The refrigerator further has a freshness preservation compartment arranged inside the refrigerating compartment and an oxygen control device for reducing the oxygen content inside the freshness preservation compartment, the oxygen control device comprises a gas-regulating membrane assembly and a gas extraction assembly. The gas-regulating membrane assembly has at least one gas-regulating membrane for selective gas permeation.

Abstract: A payment system, comprising: a receipt apparatus; a payment apparatus, the payment apparatus being connected to the receipt apparatus by means of electromagnetic induction, such that the receipt apparatus can receive information about the payment apparatus; and an identity recognition apparatus, the identity recognition apparatus being disposed in a payment environment and separated from the payment apparatus spatially, and the identity recognition apparatus being in signal connection with the receipt apparatus, wherein when a payer pays money, the identity recognition apparatus is used for recognising identity information about the payer, wherein the payment environment is a place where the receipt apparatus and the payment apparatus are located simultaneously. The payment system ensures the safety, convenience and efficiency of payment. Also provided are a payment device and a payment method.

Abstract: A microdroplet treatment device, comprising: a sample introduction system, a microfluidic chip system (46), a temperature control system, a droplet recognition system, a droplet detection system and a control system (45); the sample introduction system is used for introducing, into the microdroplet treatment device, samples of aqueous phase and oil phase, and the sample introduction system comprises at least: a sample introduction system I (41) and a sample introduction system II (42), the sample introduction system I (41) being used for introducing, into the microdroplet treatment device, samples of oil phase, and the sample introduction system II (42) being used for introducing into the microdroplet treatment device, samples of aqueous phase; the microfluidic chip system (46) comprises a substrate (4), pipes (1a, 1b, 1c, 1d, 2, 3) formed in the substrate, and a first detection window (9) and a second detection window (10); the temperature control system comprises: a temperature sensor and a temperature cont

Abstract: The present invention provides a refrigerator, comprising: an adsorption container, an air compressor and a nitrogen storage tank. A sealed storage space is formed in a storage compartment of the refrigerator. The adsorption container with carbon molecular sieves disposed therein is disposed in the storage compartment. The air compressor is directly connected to the adsorption container through an air inlet pipe and configured to supply compressed air for the adsorption container in a controlled manner so as to allow the carbon molecular sieves to prepare nitrogen by means of the compressed air. A gas inlet end of the nitrogen storage tank is connected to the adsorption container, and a gas outlet end thereof is communicated with the storage space.

Abstract: The present invention provides a refrigerating and freezing device. A first sealed space and a second sealed space are disposed in a storage space inside the refrigerating and freezing device. The refrigerating and freezing device is further provided with a nitrogen generation device, which comprises an adsorption device and an air compressor that supplies compressed air for the adsorption device. The adsorption device utilizes the compressed air to prepare nitrogen that is provided for the first sealed space and an oxygen-enriched gas that is provided for the second sealed space. The freshness preservation capability of the first sealed space is improved. The bioactivity of food in the second sealed space is guaranteed.

Abstract: Disclosed is an oxygen-control freshness preservation refrigerator, comprising a cabinet with a refrigerating compartment and a freezing compartment. A partition plate for separating the refrigerating compartment from the freezing compartment is arranged in the cabinet. The refrigerator further has a freshness preservation compartment arranged inside the refrigerating compartment and an oxygen control device for reducing the oxygen content inside the freshness preservation compartment, the oxygen control device comprises a gas-regulating membrane assembly and a gas extraction assembly. The gas-regulating membrane assembly has at least one gas-regulating membrane for selective gas permeation.

Abstract: The invention relates to a novel plasma induced mutation breeding device which comprises: a sample treatment system including a sterile working compartment free of bioactive contaminant; a plasma generator; a radio frequency (RF) power module connected with the plasma generator; a cooling system for cooling the plasma generator; a detection system including a gas flow controller for controlling the gas flow which generates the plasma jet and a temperature sensor for detecting the temperature of the jet emitted by the plasma generator; and a control system with an operation panel and a controller for controlling the operation of the mutation breeding device, wherein the controller is connected with the RF power module, gas flow controller, temperature sensor, cooling system as well as the operation panel, respectively, and said plasma generator stably emits the plasma jet at 37±3° C. during the biological sample processing.

Abstract: The present invention provides a refrigerator, comprising: an adsorption container, an air compressor and a nitrogen storage tank. A sealed storage space is formed in a storage compartment of the refrigerator. The adsorption container with carbon molecular sieves disposed therein is disposed in the storage compartment. The air compressor is directly connected to the adsorption container through an air inlet pipe and configured to supply compressed air for the adsorption container in a controlled manner so as to allow the carbon molecular sieves to prepare nitrogen by means of the compressed air. A gas inlet end of the nitrogen storage tank is connected to the adsorption container, and a gas outlet end thereof is communicated with the storage space.

Abstract: The present invention provides a refrigerating and freezing device. A first sealed space and a second sealed space are disposed in a storage space inside the refrigerating and freezing device. The refrigerating and freezing device is further provided with a nitrogen generation device, which comprises an adsorption device and an air compressor that supplies compressed air for the adsorption device. The adsorption device utilizes the compressed air to prepare nitrogen that is provided for the first sealed space and an oxygen-enriched gas that is provided for the second sealed space. The freshness preservation capability of the first sealed space is improved. The bioactivity of food in the second sealed space is guaranteed.

Abstract: This disclosure relates to a smart wearable device and a contactless payment method, said smart wearable device comprising: an information storage unit, a control unit and a wireless communication unit, wherein, the information storage unit is used for storing information of one or more bank cards; the control unit is used for identifying gathering means based on information of the gathering means received by the wireless communication unit, reading bank card information from the information storage unit, and controlling the wireless communication unit to transmit the read bank card information to the gathering means for payment. By means of the technical solution of this disclosure, contactless payment operation can be performed through the smart wearable device, so as to reduce personal effects carried by the user, increase life convenience of the user, and enhance user experience.

Abstract: A display screen and a portable device are disclosed. The display screen includes a display region and a non-display region surrounding the display region, the display region includes at least one transparent antenna structure, the antenna structure includes an antenna and a capacitor which are located in a same layer, and the capacitor is electrically connected to the antenna. The portable device includes the display screen. The display screen and the portable device simplify the manufacturing process and also reduce the manufacturing difficulty.

Abstract: A payment system, comprising: a receipt apparatus; a payment apparatus, the payment apparatus being connected to the receipt apparatus by means of electromagnetic induction, such that the receipt apparatus can receive information about the payment apparatus; and an identity recognition apparatus, the identity recognition apparatus being disposed in a payment environment and separated from the payment apparatus spatially, and the identity recognition apparatus being in signal connection with the receipt apparatus, wherein when a payer pays money, the identity recognition apparatus is used for recognising identity information about the payer, wherein the payment environment is a place where the receipt apparatus and the payment apparatus are located simultaneously. The payment system ensures the safety, convenience and efficiency of payment. Also provided are a payment device and a payment method.

Abstract: The invention relates to a novel plasma induced mutation breeding device which comprises: a sample treatment system including a sterile working compartment free of bioactive contaminant; a plasma generator; a radio frequency (RF) power module connected with the plasma generator; a cooling system for cooling the plasma generator; a detection system including a gas flow controller for controlling the gas flow which generates the plasma jet and a temperature sensor for detecting the temperature of the jet emitted by the plasma generator; and a control system with an operation panel and a controller for controlling the operation of the mutation breeding device, wherein the controller is connected with the RF power module, gas flow controller, temperature sensor, cooling system as well as the operation panel, respectively, and said plasma generator stably emits the plasma jet at 37±3° C. during the biological sample processing.

Abstract: This disclosure relates to a smart wearable device and a contactless payment method, said smart wearable device comprising: an information storage unit, a control unit and a wireless communication unit, wherein, the information storage unit is used for storing information of one or more bank cards; the control unit is used for identifying gathering means based on information of the gathering means received by the wireless communication unit, reading bank card information from the information storage unit, and controlling the wireless communication unit to transmit the read bank card information to the gathering means for payment. By means of the technical solution of this disclosure, contactless payment operation can be performed through the smart wearable device, so as to reduce personal effects carried by the user, increase life convenience of the user, and enhance user experience.

Abstract: A Gamma curve adjustment method and a Gamma curve adjustment apparatus for a display apparatus. The method includes: obtaining correspondence relationship between current grayscale voltages and first transmittances of the display apparatus, the first transmittances being the transmittances of the display apparatus driving by the current grayscale voltages; determining a target grayscale voltage corresponding to each gray scale based on the correspondence relationship between the current grayscale voltages and the first transmittances and an ideal Gamma curve; generating and outputting the target grayscale voltage corresponding to each gray scale to the display apparatus; and obtaining an actual Gamma curve of the display apparatus driven by the target grayscale voltages as a final Gamma curve. The Gamma curve adjustment method improves the speed and efficiency of adjusting the Gamma curve.

Abstract: A display screen and a portable device are disclosed. The display screen includes a display region (1) and a non-display region (2) surrounding the display region (1), the display region (1) includes at least one transparent antenna structure (3), the antenna structure (3) includes an antenna (31) and a capacitor (32) which are located in a same layer, and the capacitor (32) is electrically connected to the antenna (31). The portable device includes the display screen. The display screen and the portable device simplify the manufacturing process and also reduce the manufacturing difficulty.

Abstract: A method for helium mass spectrometric fine-leak test is based on quantitative determination of maximum test-waiting time, which gives a method for quantitative determination of the maximum test-waiting time for fine-leak test during a helium mass spectrometric test process of the sealability, and gives a method for determining the criterion for measured leak rate by taking the minimum helium gas exchange time constant, i.e., a rigour grade ?Hemin, of an acceptable sealed electronic component as a basic criterion for helium mass spectrometric fine-leak test. Based on the inventive method for quantitative determination of the maximum test-waiting time, for most of the cavity volume ranges, the maximum test-waiting time that is determined accurately may be much longer than 1 hour or 0.5 hour as determined qualitatively by the existing related standards.