Abstract: The present invention relates to an RF transmit system and method, MRI system and a pre-scan method and medium thereof. The RF transmit system comprises: an RF output unit, for generating and outputting an RF pulse signal; an RF amplifier, for amplifying the RF pulse signal; and a signal processing unit, for communicating the amplified RF pulse signal to an RF transmit coil of the MRI system and outputting a feedback signal to the RF output unit, wherein the RF output unit generates a linearity compensation control signal based on the feedback signal and a predetermined feedback signal-linearity compensation value-relationship, so as to carry out linearity compensation for the RF pulse signal outputted by the RF output unit. The RF transmit method corresponds to the above noted system and the MRI system comprises the above noted RF transmit system. The pre-scan method comprises the RF transmit method. Instructions recorded by the medium may execute the above noted RF transmit method and pre-scan method.

Abstract: Compositions and methods for expressing alpha 1 antitrypsin (AAT) in a host cell are provided. Also provided are compositions and methods for treating subjects having alpha 1 antitrypsin deficiency (AATD).

Abstract: A method and device are described for implementing instant communication. Information indicating that a first user is logged into an instant communication interface is obtained. On-line users are displayed to the first user in response to the login of the first user. A first user selects an object to follow from the on-line users and, information about the selected object to follow is received in response to the first user selecting the object to follow from the on-line users. The first user may be set into a first instant communication room in which the selected object to follow resides, for performing instant communication. The device includes: an obtaining module, a displaying module and a processing module. In this manner communication between strangers is facilitated and the efficiency of making friends is enhanced.

Abstract: Disclosed are a pentacyclic triterpene compound as shown in general formula (I) and a preparation method therefor. The compound has an effective antagonistic effect on FXR receptors.

Abstract: The present invention provides a planar balun and a multi-layer circuit board. The planar balun formed on the multi-layer circuit board comprises: a first winding with at least one turn, which is formed in a first conductive layer, and has a first lead and a second lead serving as a first balanced end and a second balanced end of the balun respectively; a second winding with at least one turn, which is formed in a second conductive layer separated from the first conductive layer by at least a first insulating layer, and has a third lead and a fourth lead, wherein the third lead is connected to a ground potential, and the fourth lead serves as an unbalanced end of the balun; and a first balancing capacitor, which is connected between a selected portion near a center of the first winding and the ground potential.

Abstract: The present disclosure provides an electronic device and an alarm control method. The electronic device includes: a detecting component, configured to obtain a physiological feature parameter of a user; a first input component, configured to receive verification information inputted by the user; and a first processing component, configured to receive the inputted verification information via the first input component when determining that the physiological feature parameter obtained by the detecting component satisfies a presupposed condition, perform a normal operating mode of the electronic device when determining that the verification information is first preset verification information, and perform an alarm operation when determining that the verification information is second preset verification information. The alarm operation at least includes transmitting first prestored information to a first object.

Abstract: The present invention relates to a GPR84 receptor antagonist and use thereof. The GPR84 receptor antagonist of the present invention has a structure as represented by formula (I), the definitions of R1, R2, R3, R4, L1, L2, L3, L4, L5, L6, Y, Z, and rings A, B, C, and D are as described in the description and claims. The GPR84 receptor antagonist of the present invention can competitively inhibit the activation of the receptor caused by an agonist of GPR84, and can be used in the preparation of a medicament for treating related diseases caused by high expression or high excitability of GPR84 receptor, the diseases including multiple sclerosis, inflammatory bowel disease, arthritis and the like.

Abstract: The present disclosure provides an electronic device and an alarm control method. The electronic device includes: a detecting component, configured to obtain a physiological feature parameter of a user; a first input component, configured to receive verification information inputted by the user; and a first processing component, configured to receive the inputted verification information via the first input component when determining that the physiological feature parameter obtained by the detecting component satisfies a presupposed condition, perform a normal operating mode of the electronic device when determining that the verification information is first preset verification information, and perform an alarm operation when determining that the verification information is second preset verification information. The alarm operation at least includes transmitting first prestored information to a first object.

Abstract: Embodiments of a shearography system may include light sources configured to produce beams of light to illuminate a test area. Each of the beams of light may include a different wavelength. A camera may be configured to obtain intensity information corresponding to reflections of the lights off of the test area. An optical shearing device may be disposed in an optical path between the light sources and the camera and the optical shearing device may be configured to provide a shearing angle.

Abstract: A display system includes: a display screen having a first display area; a processor configured to modulate laser beams to be emitted from a laser projector according to a pre-stored holographic image data source to obtain modulated laser beams; the laser projector configured to project the modulated laser beams to create a first holographic image in front of the first display area; and at least one photodetector configured to collect first gesture information about a first gesture through which the first holographic image is controlled by a viewer. The processor is further configured to generate a first control signal according to the first gesture information, and re-modulate the laser beams to be emitted from the laser projector, so as to create a second holographic image corresponding to the first control signal.

Abstract: Provided are 1-(3-aminopropyl) substituted cyclic amine compounds as represented by frmula (I), pharmaceutically acceptable salts, enantiomers, diastereoisomers, racemates and mixtures thereof, and a method of synthesizing said 1-(3-aminopropyl) substituted cyclic amine compounds by using aromatic heterocyclic formaldehyde as raw material. Said compounds can be used as CCR 5 antagonist for the treatment of HIV infection.

Abstract: Described herein are multi-material, multi-functional microfluidic devices comprising a folded architecture that mimics the layered arrangement of cells in certain tissues. The devices are suitable for tissue engineering (for example, for drug screening or implants), biological sensing, or diagnostics. The complex, three-dimensional devices may be fabricated without the use of alignment tooling.

Abstract: The present invention relates to a class of compounds represented by the formula I, or pharmaceutically acceptable salts thereof, methods for their preparation, and application as small molecule tools that function as GPR84 agonists, and their use in preparing a medicament for the treatment of septicemia.

Abstract: The present invention provides a planar balun and a multi-layer circuit board. The planar balun formed on the multi-layer circuit board comprises: a first winding with at least one turn, which is formed in a first conductive layer, and has a first lead and a second lead serving as a first balanced end and a second balanced end of the balun respectively; a second winding with at least one turn, which is formed in a second conductive layer separated from the first conductive layer by at least a first insulating layer, and has a third lead and a fourth lead, wherein the third lead is connected to a ground potential, and the fourth lead serves as an unbalanced end of the balun; and a first balancing capacitor, which is connected between a selected portion near a center of the first winding and the ground potential.

Abstract: A method and device are described for implementing instant communication. Information indicating that a first user is logged into an instant communication interface is obtained. On-line users are displayed to the first user in response to the login of the first user. A first user selects an object to follow from the on-line users and, information about the selected object to follow is received in response to the first user selecting the object to follow from the on-line users. The first user may be set into a first instant communication room in which the selected object to follow resides, for performing instant communication. The device includes: an obtaining module, a displaying module and a processing module. In this manner communication between strangers is facilitated and the efficiency of making friends is enhanced.

Abstract: Method and apparatus for controlling a physical layer protocol data unit (PPDU) transmission rate of a physical layer in a first terminal are provided. The method includes: obtaining a media access control protocol data unit (MPDU) retransmission frequency of the first terminal in a first period, where the first terminal is a station or an access point in a wireless network; if the MPDU retransmission frequency is less than a frequency threshold, promoting the PPDU transmission rate in a second period; and else, suppressing the PPDU transmission rate in the second period, where the second period is following and adjacent to the first period along a time axis. The PPDU transmission rate may be adjusted adaptively according to a channel's practical transmission state, the physical layer rate may be prevented from decreasing continuously in noisy channel environment, and a throughput rate may be improved in real time.

Abstract: A method and device are described for implementing instant communication. Information indicating that a first user is logged into an instant communication interface is obtained. On-line users are displayed to the first user in response to the login of the first user. A first user selects an object to follow from the on-line users and, information about the selected object to follow is received in response to the first user selecting the object to follow from the on-line users. The first user may be set into a first instant communication room in which the selected object to follow resides, for performing instant communication. The device includes: an obtaining module, a displaying module and a processing module. In this manner communication between strangers is facilitated and the efficiency of making friends is enhanced.

Abstract: Method and apparatus for controlling length of aggregation frames in a wireless network is provided. The method includes: obtaining a noisy level of a channel based on the number of first data received by a first terminal in a first period, the first terminal being a STA or AP in the wireless network, and the first data include aggregation frames or non-aggregation frames; and determining length of an aggregation frame to be transmitted by the first terminal in a second period based on the noisy level, where the second period is following and adjacent to the first period along a time axis. The first terminal may detect the noisy level and select the length of the aggregation frame based on the noisy level. Thus, inter-frame collision and interference in the channel may be reduced, channel resources may be well utilized, and a throughput rate may be improved in real time.

Abstract: There are provided a method, apparatus, system and computer readable storage medium of adding an instant message contact. The method includes: receiving a joining-in request for a group from a client where a user locates, the joining-in request comprising a group identifier; acquiring audio and/or video information of other user in the group, based on the group identifier; and transmitting the audio and/or video information of the other user to the client where the user locates, for adding by the client where the user locates the instant message contact based on the audio and/or video information of the other user. Thereby, the mutual trust between unknown users is improved, and the success ratio of adding an unknown user as a contact and the ratio of turning into a contact from an unknown user are increased.