Abstract: A method for producing an active short circuit condition in an electric motor of a hybrid electric vehicle including a traction battery, an inverter having switches in communication with the electric motor and the traction battery, and an inverter controller in communication with the inverter and configured to generate driver signals to operate the switches to produce three-phase alternating current for the electric motor to drive a vehicle propulsion system or to produce direct current for charging the traction battery. The method includes determining an electric motor speed threshold, wherein the electric motor speed threshold is continuously variable, comparing a monitored speed to the speed threshold, and generating, in response to the monitored speed exceeding the speed threshold, driver signals to operate the switches to produce an active short circuit condition in the electric motor to prevent overcharging of the traction battery.

Abstract: A system for producing an active short circuit in an electric motor of a hybrid electric vehicle having a traction battery includes an inverter to be provided in communication with the motor and battery, and an inverter controller to generate driver signals to operate inverter switches to produce three-phase AC for the motor or to produce DC for battery charging. In response to motor speed exceeding a threshold, the controller is configured to generate driver signals to operate the inverter switches to produce an active short circuit in the motor to prevent battery overcharging. A processor and electric circuit are each configured to independently generate an active short circuit control signal operative to effectuate generation of the driver signals, the active short circuit produced based on an active short circuit control signal from the electric circuit in an absence of an active short circuit control signal from the processor.

Abstract: A system for active short circuit notification in an electric motor of a hybrid electric vehicle including a traction battery, an internal combustion engine in mechanical communication with the motor, and a propulsion system driven by the motor or engine. The system includes an inverter and inverter controller to generate signals to operate inverter switches to produce AC for the motor or DC for battery charging. In response to motor speed exceeding a threshold, the inverter controller is configured to generate signals to operate the switches to produce an active short circuit in the motor to prevent battery overcharging. In response to an active short circuit, the inverter controller is configured to transmit a notification signal to a vehicle controller configured to generate an engine stop control signal operative to stop the engine to reduce current circulation between the inverter and motor caused by the active short circuit.

Abstract: The present disclosure relates to gutta-percha containing carbon nanotubes and a preparation method therefor. The gutta-percha is prepared by mixing a raw material, prepared from the following components of eucommia ulmoide gum, zinc oxide and carbon nanotubes, and extruding the mixed raw material. An orientation factor of the carbon nanotubes in the gutta-percha is greater than 10.8. The preparation method comprises: mixing the components according to dosages, and extruding a mixed product to prepare the gutta-percha containing carbon nanotubes.

Abstract: The feedback loop of a switching power converter controller is provided with an averaging circuit that averages either an output voltage, an error signal, or a control voltage. Regardless of which feedback signal is averaged, the averaging occurs over a first cycle of a rectified input voltage to form an averaged signal that is used by the feedback loop in a subsequent cycle of the rectified input voltage.

Abstract: Techniques for data analysis are provided. Data collected from one or more social media services is received, and a first product referenced in the received data is identified. The received data is evaluated using one or more natural language processing (NLP) techniques to determine a first sentiment reflected in the data, with respect to the first product. A shift from an existing sentiment to the first sentiment is determined with respect to the first product. Upon determining that the shift exceeds predefined criteria, a survey requesting information about the first product is transmitted to a first user associated with the received data. A first response is received from the first user, and one or more actions are initiated based at least in part on the first response.

Abstract: The present disclosure provides a task scheduling method, an apparatus, a device and a computer readable storage medium provided by the, and an implementation solution thereof includes: identifying obstacle information of an obstacle around a vehicle; determining a safety level of the obstacle according to driving information and the obstacle information of the vehicle; determining a driving task according to the obstacle information, determining a safety level of the driving task according to the safety level of the obstacle corresponding to the obstacle information; and performing a task scheduling according to the safety level of the driving task. The method, the apparatus, the device and the computer readable storage medium provided by the present disclosure can perform the task with the highest safety level preferentially and avoid a situation in which an urgent situation is unable to be dealt with in time.

Abstract: Disclosed is a method for optimizing feature parameters of straight grooves of a wet friction element and relates to the technical field of heavy-duty vehicle transmission. By using the method, the feature parameters of the straight grooves of the wet friction element can be improved by optimization, and the thermoelastic stability of the wet friction element can be improved.

Abstract: A method for processing vehicle fault, the method includes obtaining, by a first vehicle fault processing device, first data information of a main system of a vehicle in real time, obtaining second data information of the main system sent by a second vehicle fault processing device, and sending the first data information to the second vehicle fault processing device, so that the second vehicle fault processing device performs fault determination on the main system according to the first data information and the second data information; determining, by the first vehicle fault processing device, whether a fault has occurred in the main system according to the first data information and the second data information; and performing, by the first vehicle fault processing device, corresponding control on the vehicle according to a pre-configured control authority if the fault has occurred in the main system.

Abstract: A method and a system for controlling combustion of a natural gas engine. The method includes: determining, based on a current operation parameter of a natural gas engine, an operation state of the natural gas engine, and calculating a total injection quantity of natural gas and pilot diesel required by the natural gas engine in the operation state; adopting a direct injection diffusion-combustion mode in a case that the operation state is an idle state or a low load state; adopting a natural gas homogeneous hybrid active control compression-ignition mode in a case that the operation state is a medium load state; configuring the total injection quantity into three parts including a compression-ignition natural gas injection quantity, a pilot diesel injection quantity, and a diffusion-combustion natural gas injection quantity in a case that the operation state is a high load state, and sequentially injecting them into a combustion chamber.

Abstract: The present invention discloses an H-3 silicon carbide PN-type radioisotopic battery and a manufacturing method therefor. The radioisotopic battery has a structure including, from bottom to top, an N-type ohmic contact electrode, an N-type highly doped SiC substrate, an N-type SiC epitaxial layer, and a P-type SiC epitaxial layer. A P-type SiC ohmic contact doped layer is disposed on a partial upper area of the P-type SiC epitaxial layer, a P-type ohmic contact electrode is disposed on top of the P-type SiC ohmic contact doped layer, a SiO2 passivation layer is disposed on an upper area of the P-type SiC epitaxial layer where the P-type ohmic contact doped layer is removed, and an H-3 radioisotope source is provided on the top of the SiO2 passivation layer.

Abstract: A flyback converter control architecture is provided in which primary-only feedback techniques are used to ensure smooth startup and detection of fault conditions. During steady-state operation, secondary-side regulation is employed. In addition, current limits are monitored during steady-state operation using primary-only feedback techniques to obviate the need for a secondary-side current sense resistor.

Abstract: A system detects an object being viewed through a visual recognition system, the object having an associated expiration date. The system determines a caloric content associated with the object. The system assesses caloric consumption needs of at least one consumer. The system determines a likelihood of consumption of the object by the consumer based on the caloric content of the object, the caloric consumption needs of the consumer, and the expiration date of the object. The system is displayed as a gradient on a display device as an overlay associated with the object, the gradient representing a changing likelihood of total consumption of the object by the consumer over a period of time.

Abstract: The feedback loop of a switching power converter controller is provided with an averaging circuit that averages either an output voltage, an error signal, or a control voltage. Regardless of which feedback signal is averaged, the averaging occurs over a first cycle of a rectified input voltage to form an averaged signal that is used by the feedback loop in a subsequent cycle of the rectified input voltage.

Abstract: The invention provides an application of a nano RNAi preparation in PVY prevention and control, belongs to the field of genetic engineering and application thereof, and can solve the problem of the nano RNAi preparation in PVY virus prevention and control. The RNAi preparation is prepared from dsRNA and chitosan nano materials, wherein the dsRNA is prepared from three gene capsid proteins CP, auxiliary components-protease HC-Pro and genome connexin VPg, and the dsRNA plays a key role in replication, proliferation and movement of PVY virus in plants. The nano RNAi preparation provided by the invention is used for virus prevention and control of PVY, so that the stability of dsRNA is stronger, the effect is longer, a good virus prevention and control effect can be achieved, and the nano RNAi preparation has a good application prospect in the field of PVY virus prevention and control.

Abstract: A flyback converter control architecture is provided in which primary-only feedback techniques are used to ensure smooth startup and detection of fault conditions. During steady-state operation, secondary-side regulation is employed. In addition, current limits are monitored during steady-state operation using primary-only feedback techniques to obviate the need for a secondary-side current sense resistor.

Abstract: An example oscillator device comprises (i) an oscillation circuit arranged for generating and outputting an oscillation signal and comprising an active circuit to ensure oscillation is maintained, (ii) a voltage-to-current conversion replica circuit of the active circuit arranged for receiving the oscillation signal and for outputting a current proportional to the oscillation signal, (iii) biasing means arranged to generate a constant bias current to activate the oscillation circuit, and (iv) subtraction means for subtracting the current proportional to the oscillation signal from the bias current, thereby obtaining a resulting current which can be used for adapting the oscillation signal's amplitude.

Abstract: The present invention relates to the field of stem cell technology, and in particular to a stem cell preparation and its application in the preparation of drugs for the treatment of osteoarthritis (OA). The composition provided by the invention can significantly improve the activity of umbilical cord mesenchymal stem cells under cryopreservation conditions, and the stem cell preparation prepared therefrom has a good effect on repairing cartilage injury caused by OA, thereby playing a role in the treatment of OA.

Abstract: An adaptive pulse frequency modulation for a switching power converter is provided that varies the switching frequency across a cycle of a rectified input voltage for the switching power converter From a beginning of the cycle of the rectified input voltage, the switching frequency decreases from a maximum value to a minimum value at a mid-point of the cycle and then increases from the mid-point back to the maximum value at an end of the cycle.

Abstract: A session management function entity selection method includes receiving a reselection indication and information about a first session of user equipment UE from a first session management function entity, where the reselection indication is used to instruct to reselect a session management function entity; saving a correspondence between the first session management function entity and the information about the first session according to the reselection indication; receiving a session establishment request message, where the session establishment request message carries the information about the first session; determining a second session management function entity different from the first session management function entity; and sending a session management request to the second session management function entity.