Abstract: The present disclosure provides an artificial cell for single-cell mass spectrometry (SCMS) measurement and a preparation method thereof. In the present disclosure, the artificial cell includes an internal aqueous phase, an intermediate oil phase, and an external aqueous phase; where the internal aqueous phase includes polyethylene glycol (PEG) and a polyvinyl alcohol (PVA) aqueous solution, and the intermediate oil phase includes a chloroform-hexane mixture of L-?-phosphatidylcholine; and the external aqueous phase includes PVA and an F-68 aqueous solution. Compared with natural cell samples, new artificial single cells based on microfluidic self-assembly provided by the present disclosure have better uniformity, stability, and controllability. The artificial cell can effectively avoid significant measurement differences between individual single-cell samples, and effectively solve the problem of difficulty in stably preserving biological samples.

Abstract: An uninterruptible power supply, a control method and a power supply system for normally starting the uninterruptible power supply and securing switch devices are provided. The uninterruptible power supply includes a first rectification circuit, a charge-discharge circuit, a bus capacitor, a first switch circuit and a second rectification circuit. The first rectification circuit is connected to the charge-discharge circuit, and is configured to rectify a voltage outputted by the alternating current power supply. The charge-discharge circuit is connected to the bus capacitor, and is configured to charge the bus capacitor after boosting the voltage outputted by the first rectification circuit, until the voltage across the bus capacitor reaches a first voltage. The first switch circuit is connected to the second rectification circuit, and is configured to connect the alternating current power supply to the second rectification circuit.

Abstract: The present application provides a three-mode storage method for program blocks based on check, comprising: first dividing the program to be injected into N blocks and checking each block to obtain the first checksum; then injecting the program to be injected and the first checksum twice in the program storage area, and the two injected programs are noted as the main program and the backup program, respectively; dividing the main program into N blocks, and checking each program block to obtain the second checksum during program run; dividing the backup program into N blocks and checking each block to obtain the third checksum; and comparing the checksum, second checksum and third checksum: if the three are consistent, performing no operation; updating the program or checksum and checking again, if the three are inconsistent.

Abstract: A removable real time clock battery (“RRTCB”) assembly is disclosed herein. The RRTCB assembly has an outer housing removably mounted in a port of a downhole tool. The outer housing is adapted to receive at least a portion of an inner housing. The inner housing has a cavity therein and is mounted in the port of the downhole tool. The inner housing is removably disposed within the outer housing. A real time clock battery is removably disposed in the cavity of the inner housing. The real time clock battery electrically connects to a clock disposed within the downhole tool. The RRTCB assembly can be readily removed from the downhole tool or bottomhole assembly (while at the earth's surface) without otherwise disassembling the downhole tool. The real time clock battery can then be removed and replaced or installed if not present.

Abstract: A removable real time clock battery (“RRTCB”) assembly is disclosed herein. The RRTCB assembly has an outer housing removably mounted in a port of a downhole tool. The outer housing is adapted to receive at least a portion of an inner housing. The inner housing has a cavity therein and is mounted in the port of the downhole tool. The inner housing is removably disposed within the outer housing. A real time clock battery is removably disposed in the cavity of the inner housing. The real time clock battery electrically connects to a clock disposed within the downhole tool. The RRTCB assembly can be readily removed from the downhole tool or bottomhole assembly (while at the earth's surface) without otherwise disassembling the downhole tool. The real time clock battery can then be removed and replaced or installed if not present.

Abstract: A mating connector that is rotatable and wet-mateable is disclosed herein. The connector has mating components that can be characterized as male and female. The connector may have one or more electrical and/or non-electrical contacts. As used herein, “wet-mateable” or “wet-connectable” means proper mating of the male and female components can be achieved even in the presence of conductive fluid. Being rotatable means the male and female components can be rotated independently during the mating process. A male component of a rotatable and wet-mateable mating connector is provided that has conductive and non-conductive sealing elements. A female component of the rotatable and wet-mateable mating connector is provided having conductive elements that are complementary to the male component. The male component is inserted into a chamber within the female component to produce the rotatable and wet-mateable mating connector.

Abstract: A mating connector that is rotatable and wet-mateable is disclosed herein. The connector has mating components that can be characterized as male and female. The connector may have one or more electrical and/or non-electrical contacts. As used herein, “wet-mateable” or “wet-connectable” means proper mating of the male and female components can be achieved even in the presence of conductive fluid. Being rotatable means the male and female components can be rotated independently during the mating process. A male component of a rotatable and wet-mateable mating connector is provided that has conductive and non-conductive sealing elements. A female component of the rotatable and wet-mateable mating connector is provided having conductive elements that are complementary to the male component. The male component is inserted into a chamber within the female component to produce the rotatable and wet-mateable mating connector.

Abstract: A calibration method and apparatus for current and resistance are provided, where the current calibration method includes: injecting at least one portion of a set of predetermined compensation currents into at least one of an output current of a first current source and an output current of a second current source, and dynamically adjusting a distribution of the at least one portion of the set of predetermined compensation currents until two monitored voltage drops are equal to each other, and recording a first compensation current configuration; exchanging the first and second current sources, and dynamically adjusting the distribution of the at least one portion of the set of predetermined compensation currents until the two monitored voltage drops are equal to each other, and recording a second compensation current configuration; and according to the first and second compensation current configurations, generating a resultant compensation current, for use of current compensation.

Abstract: A calibration method and apparatus for current and resistance are provided, where the current calibration method includes: injecting at least one portion of a set of predetermined compensation currents into at least one of an output current of a first current source and an output current of a second current source, and dynamically adjusting a distribution of the at least one portion of the set of predetermined compensation currents until two monitored voltage drops are equal to each other, and recording a first compensation current configuration; exchanging the first and second current sources, and dynamically adjusting the distribution of the at least one portion of the set of predetermined compensation currents until the two monitored voltage drops are equal to each other, and recording a second compensation current configuration; and according to the first and second compensation current configurations, generating a resultant compensation current, for use of current compensation.