Abstract: An encrypted communication method and apparatus, a device, and a medium are disclosed. The method includes: a first protocol layer of a first party obtains a MAC address of a second party according to a data transmission request from an application layer, the data transmission request including an NLP address of the second party; the first protocol layer generates a first temporary key pair including a first temporary public key and a first temporary private key; the first protocol layer obtains a second temporary public key of the second party according to the first temporary public key; the first protocol layer generates a shared key according to the second temporary public key and the first temporary private key; the first protocol layer determines a data message, the data message carrying encrypted data obtained by encrypting using the shared key, and the receiver of the data message being the second party.

Abstract: An anesthesia machine, a respiratory support device, and a ventilation control method are provided. The ventilation module provides a first gas at a first ventilation frequency and a second ventilation frequency, respectively. When the ventilation module provides the first gas to a patient at the second ventilation frequency, the ventilation module can simultaneously provide the first gas to the patient at the first ventilation frequency in at least one of the multiple second inspiratory phases. As such, this disclosure provides respiratory support for a patient by superposing ventilation modes of two different frequencies, thereby improving an elimination rate of carbon dioxide, when providing the respiratory support for the patient.

Abstract: An anesthesia machine is disclosed, which includes an anesthetic delivery apparatus, a respiratory loop, a first ventilation control apparatus, and a ventilation module. The anesthetic delivery apparatus mixes a first gas with an anesthetic to obtain a second gas, and delivers the second gas to the respiratory loop. The first ventilation control apparatus controls the respiratory loop to periodically deliver the second gas to a patient, thereby providing anesthesia and respiratory support for the patient. The ventilation module performs periodic respiratory support on the patient by using the first gas. Therefore, according to the requirements of the clinical scenario, the corresponding ventilation support can be performed on the patient by using the anesthesia machine, thereby improving the application range of the anesthesia machine without using additional devices.

Abstract: Disclosed are an electric wheel assembly applicable for a parallelly mounted dual-tire wheel, an axle, and a vehicle. The electric wheel assembly includes a wheel and support axle assembly, an internal-rotor hub motor, a planetary gear reducer and a brake system. A planetary carrier is connected to a hub. The hub is connected to a spoke and a rim. The wheel support axle passes through a rotor sleeve and is provided with a hub bearing to support the hub and a whole wheel. A sun gear disposed at an end of the rotor sleeve of the internal-rotor hub motor is a power input of the planetary gear speed reducer, and the planetary carrier is a power output. A planetary gear of the planetary gear reducer is a tower-shaped gear and realizes a relatively high transmission ratio under a condition that an axial length is relatively small.

Abstract: An embedded system includes a host controller circuit and a microcontroller circuit. The host controller circuit is configured to access a storage device to obtain an address of a first firmware file in the storage device. The microcontroller circuit is configured to determine whether a memory circuit is being accessed by other circuits, in which the memory circuit includes memory blocks. If the memory circuit is not being accessed by the other circuits, the microcontroller circuit is further to control the host controller circuit to write the first firmware file to a first block of the memory blocks according to the address.

Abstract: A low-floor electric axle assembly including: an axle housing, two hub motors, two planetary gear reducers, two hubs, a brake system, two C-shaped beams, and a suspension system. Mechanical mounting of the suspension system is compatible with a conventional axle. The axle housing has a left and right symmetrical dumbbell-shaped structure configured to bear a weight of a vehicle. The hub motors are inner rotor type motors and are separately arranged at two ends of the axle housing left and right symmetrically. The hub motors are arranged coaxially with two wheels respectively. Two hub motor rotors are connected to the planetary gear reducers respectively. Each of the planetary gear reducers is a single-stage planetary gear reducer. A sun gear of each of the planetary gear reducers receives power outputted by each of the hub motor. Two planetary gear reducer housings are power output ends connected to two rims respectively.

Abstract: An embedded system includes a host controller circuit and a microcontroller circuit. The host controller circuit is configured to access a storage device to obtain an address of a first firmware file in the storage device. The microcontroller circuit is configured to determine whether a memory circuit is being accessed by other circuits, in which the memory circuit includes memory blocks. If the memory circuit is not being accessed by the other circuits, the microcontroller circuit is further to control the host controller circuit to write the first firmware file to a first block of the memory blocks according to the address.

Abstract: A ventilation adjustment method and a high-frequency ventilation system, which ensure stable and accurate oxygen concentration control within an oxygen concentration setting range, are disclosed. The ventilation adjustment method includes: determining a first gas flow rate control value and a second gas flow rate control value according to a target output flow rate and an oxygen concentration setting value; determining whether the first gas flow rate control value falls into a first dead zone range and whether the second gas flow rate control value falls into a second dead zone range; if the first gas flow rate control value falls into the first dead zone range, maintaining a first gas flow rate controller turned on in an expiratory phase; and if the second gas flow rate control value falls into the second dead zone range, maintaining a second gas flow rate controller turned on in the expiratory phase.

Abstract: Disclosed are an electric wheel assembly applicable for a parallelly mounted dual-tire wheel, an axle, and a vehicle. The electric wheel assembly includes a wheel and support axle assembly, an internal-rotor hub motor, a planetary gear reducer and a brake system. A planetary carrier is connected to a hub. The hub is connected to a spoke and a rim. The wheel support axle passes through a rotor sleeve and is provided with a hub bearing to support the hub and a whole wheel. A sun gear disposed at an end of the rotor sleeve of the internal-rotor hub motor is a power input of the planetary gear speed reducer, and the planetary carrier is a power output. A planetary gear of the planetary gear reducer is a tower-shaped gear and realizes a relatively high transmission ratio under a condition that an axial length is relatively small.

Abstract: A low-floor electric axle assembly including: an axle housing, hub motors, planetary gear reducers, hubs, a brake system, C-shaped beams, and a suspension system. Mechanical mounting of the suspension system is compatible with a conventional axle, and arrangement manners of the brake system, the hub motors, and the planetary gear reducers are capable of expanding a width of a coach aisle. Each of the hub motors is arranged coaxially with a rim; a first-stage cylindrical gear drive, bevel gear drive, or hypoid gear drive is removed; an unconventional-structure planetary gear reducer is provided to ensure a high transmission ratio and transmission efficiency; the brake system is arranged at two ends of the axle and at inner sides of the motors, thereby making full use of space at the two ends of the axle, and forming the low-floor electric axle assembly.

Abstract: The present disclosure relates to medical monitoring and provides a method and an apparatus for detecting an instantaneous fetal heart rate of a Doppler fetal heart sound based on time-frequency analysis.

Abstract: The present invention provides a polypeptide TF1 for inhibiting type-2 Shiga-toxin activity, an encoding gene for the same and use thereof. The present polypeptide is named TF1 (also known as P1); its amino acid sequence is shown in SEQ ID NO: 1 in the sequence list. The polypeptide P1 can be prepared into medicine for preventing and/or treating diseases caused by type-2 Shiga toxin or the pathogens which produce type-2 Shiga toxin.

Abstract: Disclosed is an apparatus for installing a carbon dioxide absorbent canister which comprises a body, a lifting member, and a lifting mechanism. The body comprises a breathing circuit and an adapter for connecting the carbon dioxide absorbent canister with the breathing circuit. The adapter is located at or near the bottom of the body. The lifting member comprises a base portion, a positioning portion beneath the adapter, and a connecting portion. The lifting mechanism has a force receiving portion and a force applying portion and which actuates the lifting member. Actuating the handle in the first direction causes the canister to be connected to the breathing circuit and to close the breathing circuit bypass. Turning the handle in a second direction actuates the canister to enable replacement of the canister and to cause the breathing bypass to open. The process can be achieved simply with one hand.

Abstract: Disclosed is an apparatus for installing a carbon dioxide absorbent canister which comprises a body, a lifting member, and a lifting mechanism. The body comprises a breathing circuit and an adapter for connecting the carbon dioxide absorbent canister with the breathing circuit. The adapter is located at or near the bottom of the body. The lifting member comprises a base portion, a positioning portion beneath the adapter, and a connecting portion. The lifting mechanism has a force receiving portion and a force, applying portion and which actuates the lifting member. Actuating the handle in the first direction causes the canister to be connected to the breathing circuit and to close the breathing circuit bypass. Turning the handle in a second direction actuates the canister to enable replacement of the canister and to cause the breathing bypass to open. The process can be achieved simply with one hand.