Abstract: The invention provides a series of halogenated tetracyclic triterpene derivatives and their preparation and application. It is represented by the following general structural formula: R1 is halogen, R2 is H, and the halogen is selected from fluorine, chlorine, bromine or iodine; or R1 and R2 are each fluorine, and R3 is an amine, alcohol, amino acid, peptide or phosphate linked to oxygen through an acyl group. The derivatives are relatively stable in rat whole blood through pharmacokinetic studies. The absolute bioavailability after a single intragastric administration for male and female rats was 15.6% and 28.4% respectively. The mean bioavailability was 22%. The derivatives showed better in vivo activities compared with the existing standard drugs enalapril and sacubitril valsartan sodium. Meanwhile, hydrophilic prodrugs of the tetracyclic triterpenoid derivatives in the present invention were prepared. The derivatives of the present invention can be used for preparing cardiovascular medicines.

Abstract: Gallium nitride based devices and, more particularly to the generation of holes in gallium nitride based devices lacking p-type doping, and their use in light emitting diodes and lasers, both edge emitting and vertical emitting. By tailoring the intrinsic design, a wide range of wavelengths can be emitted from near-infrared to mid ultraviolet, depending upon the design of the adjacent cross-gap recombination zone. The innovation also provides for novel circuits and unique applications, particularly for water sterilization.

Abstract: A curved surface processing method for an inlet edge of a cylindrical blade of a centrifugal pump impeller includes following steps. A center of an impeller is used as a center to draw circles having respective diameters. A first point having a first distance from the center is determined on a concave side curve at a top of the blade, and a second point having a second distance from the center is determined on a concave side curve at a bottom of the blade. By improving the shape of a blade in an impeller, the angle of an inlet edge at the top of the blade is more close to the tangent direction, and the inlet angle of the top blade is reduced. A twisted surface is formed between a first arc segment at the top and a second arc segment at the bottom.

Abstract: A method and apparatus for generating a face model, a storage medium, a processor, and a terminal are provided. The method includes that: feature extraction is performed on a currently input face image from at least one dimension to obtain a plurality of facial features; classification and identification are performed according to the plurality of facial features to obtain a facial feature identification result; a mapping relationship between the multiple facial features and face pinching parameters set in a current face pinching system is acquired; and a corresponding face model is generated according to the facial feature identification result and the mapping relationship. The present disclosure solves the technical problem that a manual face pinching function provided in a game in the related art is time-consuming and laborious, and it is difficult to obtain a face pinching effect that fully meets psychological expectations.

Abstract: A unipolar connection terminal for a high-voltage connector and a connector device are provided in the invention. The unipolar connection terminal is mounted in a housing of the connector device. The connector device has a columnar insertion tube to be connected and passed through by a mating terminal, an end portion of the insertion tube extends in a radial direction to form at least three protrusion structures, and the at least three protrusion structures are arranged at intervals in a circumferential direction of an end surface of the insertion tube. According to the unipolar connection terminal and the connector device provided by the invention, when the unipolar connection terminal is mounted in the housing of the connector device, an erroneous assembly can be effectively avoided due to the arrangement of the protruding structures disposed at the end portion of the insertion tube, and a conduction effect of the connector device is guaranteed.

Abstract: An air guiding device, an air conditioner indoor unit, and an air-conditioning system are provided. The air guiding device has an air guiding part used for guiding a flow of air blown out of an air outlet of the air-conditioning system. The air guiding part is rotatable, so as to change an angle used by the air guiding part for guiding the flow of air. At least one side of the air guiding part, which is in an airflow flowing direction, is provided with a flow straightening grid.

Abstract: This invention relates to a surfactant composition, production and use thereof in tertiary oil recovery. The present surfactant composition comprises a cationic-nonionic surfactant and an anionic surfactant, and exhibits significantly improved interfacial activity and stability as compared with the prior art. With the present surfactant composition, a flooding fluid composition for tertiary oil recovery with improved oil displacement efficiency and oil washing capability as compared with the prior art could be produced.

Abstract: A handheld electric hair drier comprising a main body including a primary fluid inlet, a primary fluid outlet, a fan unit, a heating element, and a fluid flow path, and a handle. The fluid flow path comprises a primary fluid flow path that extends from the main body to the primary fluid outlet along a straight line, a side fluid flow path, and a wall-defined fluid flow path. Air fluid drawn through the side fluid flow path and the wall-defined path enters the fan unit through the primary fluid flow path. The fan unit is arranged on the primary fluid flow path, and the fan unit sucks fluid into the primary fluid flow path and transmits the fluid to pass through the heating element, so that the fluid in the primary fluid flow path is heated. The hair drier can provide high-pressure jet airflow and improve the air supplementing speed.

Abstract: An apparatus and method for controlling a vehicle lock and a vehicle may be provided. The apparatus may include a main control circuit and a switch lock execution component. The main control circuit may be configured to determine a movement speed of the vehicle when the vehicle is in an unlocked state and is moved illegally. The main control circuit may be also configured to power on the switch lock execution component and control the switch lock execution component to lock a vehicle lock when the movement speed is greater than zero and less than a preset threshold. The switch lock execution component may be configured to execute a locking operation under control of the main control circuit after the switch lock execution component is powered on.

Abstract: The disclosed embodiments provide a system for processing data. During operation, the system obtains a set of records from a set of inputs, with each record containing an entity key, a partition key, and one or more attribute-value pairs. Next, the system sorts and indexes the records by the entity key for each partitioned input. The system then processes a query of the records by matching entity key values to the sorted and indexed records for each input partition in the query. Next, the system merges the subset of records with the same entity key values into records, with each merged record containing an entity key field and a single field that includes a list of attribute-value pairs from the subset. Finally, the system outputs the merged records in response to the query.

Abstract: An anionic-cationic-nonionic surfactant as substantially represented by the formula (I) exhibits significantly improved interfacial activity and stability as compared with the prior art. With the present anionic-cationic-nonionic surfactant, a flooding fluid composition for tertiary oil recovery with improved oil displacement efficiency and oil washing capability as compared with the prior art could be produced. In the formula (I), each group is as defined in the specification.

Abstract: A machine may be configured to generate an enhanced user interface for displaying social analytics based on viral mentions and threading. For example, the machine accesses a plurality of items of digital content. The machine extracts, for each of the plurality of items of digital content, a title that describes a particular item of digital content. The machine generates a group of items of digital content based on the extracted titles associated with the plurality of items of digital content. The machine identifies, from the group of items of digital content, an original item of digital content and one or more subsequent items of digital content. The machine determines a strength value associated with the original item of digital content. The machine generates and causes a display of an enhanced user interface that displays the title and the strength value associated with the original item of digital content.

Abstract: A unipolar-doped light emitting diode or laser diode is described. The diode includes a bottom region having an n-type layer, a top region having an n-type layer, and a middle region between the top and bottom regions having at least one material different from the top or bottom region forming two or more heterojunctions. The top and bottom regions create light emission by interband tunneling-induced photon emission. Systems including the unipolar-doped diode including LIDAR are also taught.

Abstract: A beverage brewing pot and a beverage brewing method using the same. The brewing pot includes a first pot liner, a second pot liner, a water-air pump and a controller. A brewing chamber is arranged between the first pot liner and the second pot liner. The first pot liner, the second pot liner and the brewing chamber are in communication. At least the first pot liner is sealed during operation. A first water-level sensor is provided at the top of the first pot liner, and a second water-level sensor is provided at the top of the second pot liner. The controller controls the water-air pump to feed air to the first pot liner to direct the water to flow into the second pot liner. The controller controls the water-air pump to operate reversely, such that the water in the second pot liner is pumped back to the first pot liner.

Abstract: An application accessing method can be applied to a terminal, and include: monitoring whether an application invokes privacy content; and authorizing the application with permission to access the privacy content, in response to monitoring that the application invokes the privacy content, and returning other information different from the privacy content. Therefore, the user can realize the purpose of protecting the security of the user's privacy information under the premise of normal use of the application.

Abstract: The disclosure provides a digital contactless signing system for the flexible tobacco distribution, which comprises a cigarette store, a vehicle system, a vehicle access system, a database, a historical database, a server, an information entry unit, an information transmission unit, a distribution system, a client terminal and a two-dimensional code information unit, wherein the cigarette store is connected with the vehicle access system connected with the vehicle access system. The disclosure changes paper tickets into network electronic tickets, and adopts two-dimension code scanning to complete a confirmation of the tobacco handing-over between a distributor and a customer, thereby effectively saving expenses of the paper tickets. An error rate of the signing system is extremely low and almost close to zero due to changing the paper tickets to the network electronic tickets, and a whole data accuracy is improved for signing for the cigarette materials.

Abstract: This invention relates to a surfactant composition, production and use thereof in tertiary oil recovery. The present surfactant composition comprises a cationic-nonionic surfactant and an anionic surfactant, and exhibits significantly improved interfacial activity and stability as compared with the prior art. With the present surfactant composition, a flooding fluid composition for tertiary oil recovery with improved oil displacement efficiency and oil washing capability as compared with the prior art could be produced.

Abstract: This invention relates to an anionic-cationic-nonionic surfactant as substantially represented by the formula (I), production and use thereof in tertiary oil recovery. The anionic-cationic-nonionic surfactant of this invention exhibits significantly improved interfacial activity and stability as compared with the prior art. With the present anionic-cationic-nonionic surfactant, a flooding fluid composition for tertiary oil recovery with improved oil displacement efficiency and oil washing capability as compared with the prior art could be produced. In the formula (I), each group is as defined in the specification.

Abstract: A method and apparatus for generating a face model, a storage medium, a processor, and a terminal are provided. The method includes that: feature extraction is performed on a currently input face image from at least one dimension to obtain a plurality of facial features; classification and identification are performed according to the plurality of facial features to obtain a facial feature identification result; a mapping relationship between the multiple facial features and face pinching parameters set in a current face pinching system is acquired; and a corresponding face model is generated according to the facial feature identification result and the mapping relationship. The present disclosure solves the technical problem that a manual face pinching function provided in a game in the related art is time-consuming and laborious, and it is difficult to obtain a face pinching effect that fully meets psychological expectations.

Abstract: A curved surface processing method for an inlet edge of a cylindrical blade of a centrifugal pump impeller includes following steps. A center of an impeller is used as a center to draw circles having respective diameters. A first point having a first distance from the center is determined on a concave side curve at a top of the blade, and a second point having a second distance from the center is determined on a concave side curve at a bottom of the blade. By improving the shape of a blade in an impeller, the angle of an inlet edge at the top of the blade is more close to the tangent direction, and the inlet angle of the top blade is reduced. A twisted surface is formed between a first arc segment at the top and a second arc segment at the bottom.