Abstract: An operation monitoring system and monitoring method are provided, the operation monitoring system is used for monitoring at least one agricultural machine, so as to control an operating range of the agricultural machine, the operation monitoring system includes a storage device and a processor, the processor recognizes at least one operating area and at least one non-operating area of an operation environment, and generates at least one boundary between the operating area and the non-operating area, the processor further generates least one electronic fence at the at least one boundary, the processor further acquires the position of the electronic fence and monitors a position of the agricultural machine, so as to monitor whether the agricultural machine is operating in the operating area on a side of the electronic fence, thereby controlling the operating range of the agricultural machine.

Abstract: An electrically-actuated artificial muscle fiber with bidirectional linear strain and a preparation method thereof are provided. The artificial muscle fiber includes a fiber matrix, electrode layers and insulating layers. The artificial muscle fiber takes the fiber matrix as a skeleton, upper and lower layers of the fiber matrix are covered with one electrode layer respectively, and one insulating layer is covered on a surface of each of electrode layers. A helical fiber body is formed by winding. Finally, the artificial muscle fiber is formed through packaging, where metal wires are taken as leads and respectively connected to upper and lower layers of electrodes.

Abstract: An information processing apparatus includes a receiving unit configured to receive, from a terminal of a delivery requester of a battery, a delivery request for a battery for which a delivery location of the battery is designated, a selecting unit configured to select at least one storage location of a battery, and a specifying unit configured to specify a deliverer who delivers the battery from a storage location. The specifying unit is configured to transmit a delivery inquiry including information of the delivery location and the storage location to a terminal of a delivery candidate, and specify the delivery candidate as the deliverer. When the selecting unit selects a plurality of storage locations for one delivery, the delivery inquiry includes information of each storage location.

Abstract: Disclosed herein are systems and methods for automating a pump-down stop operation and, more particularly, example embodiments may include an automated pump-down stop system that adjusts a fluid rate and a winch speed before the target depth based on the remaining depth and line speed. An example method for automating a pump-down stop operation of a downhole tool string includes: measuring a depth of the downhole tool string, wherein the downhole tool string is held by a wireline; measuring a wireline tension; measuring a speed of the wireline; measuring a pumping rate; measuring an inclination of the downhole tool string; and regulating automatically a winch controller and a pump controller simultaneously to stop the downhole tool string at a target depth based at least on the measurements of one or more of the depth, wireline tension, speed, pumping rate, and/or inclination.

Abstract: Disclosed herein are systems and methods for automating a start of a pump-down operations that adjusts a pump rate and a winch speed. The methods include lowering a tool string into a wellbore via a wireline controlled by a winch unit and a pump unit, measuring at least one measurement parameter, calculating a range of wireline tension references for the winch unit from at least inputs comprising at least one user configuration parameter and the at least one measurement parameters, and a range of wireline tension references for the pump unit from at least inputs comprising at least one user configuration parameter and the at least one measurement parameters, generating a tension error signal when the measured tension of the wireline deviates from at least one of the calculated ranges of wireline tension references, and adjusting the lowering of the downhole tool string in response to the tension error signal.

Abstract: Downhole tractor control systems and methods to adjust a load of a downhole motor to drive one or more wheels of the downhole tractor are disclosed. A method to adjust a load of a downhole motor includes receiving a user input of a desired speed and torque for a plurality of motors, where the plurality of motors powering rotation of wheels of a downhole tractor. The method also includes determining a minimum actual motor speed of the plurality of motors. For at least one motor of the plurality of motors, the method includes determining a power controller output and determining a torque controller output. The method further includes adjusting a voltage source invertor based on a lesser of the power controller output and the torque controller output to modulate voltage provided to the at least one motor.

Abstract: An electrically-actuated artificial muscle fiber with bidirectional linear strain and a preparation method thereof are provided. The artificial muscle fiber includes a fiber matrix, electrode layers and insulating layers. The artificial muscle fiber takes the fiber matrix as a skeleton, upper and lower layers of the fiber matrix are covered with one electrode layer respectively, and one insulating layer is covered on a surface of each of electrode layers. A helical fiber body is formed by winding. Finally, the artificial muscle fiber is formed through packaging, where metal wires are taken as leads and respectively connected to upper and lower layers of electrodes.

Abstract: A motor detection method includes the following steps. An excitation current command is provided to a motor device, and the motor device is driven to rotate at the first angle. The first feedback angle of the motor device in the first resting position is detected and obtained. The motor device is driven to rotate at the second angle according to the excitation current command. The second feedback angle of the motor device in the second resting position is detected and obtained. The magnetic pole offset angle of the motor device is calculated according to the first feedback angle and the second feedback angle.

Abstract: The specification provides a method and a system for collaboratively updating a model by multiple parties for implementing privacy protection. A server can deliver an aggregation result of a t-th round of common samples to each participant i. Each participant i performs first update on a local ith model according to the t-th round of common samples and the aggregation result. Each participant i performs second update on the ith model obtained after the first update based on a first private sample fixed in a local sample set and a sample label thereof. Each participant i inputs a (t+1)th round of common samples that are used for a next round of iteration into the ith model obtained after the second update, and sends an output second prediction result to the server, so the server aggregates n second prediction results corresponding to n participants for a next round of iteration.

Abstract: Downhole tractor control systems and methods to maintain a load among multiple tractors are disclosed. A method to adjust a load among multiple tractors includes receiving first power feedback of a first downhole tractor, receiving second power feedback of a second downhole tractor, identifying an unbalance load condition when a difference between the first power feedback and the second power feedback exceeds a predetermined threshold, and adjusting, in response to identifying the unbalance load condition and based on the difference, power reference of the first downhole tractor and the second downhole tractor.

Abstract: Disclosed herein is a system for measuring a microwave dielectric property of a solid material under force. The system measures the microwave dielectric property of the solid material under a horizontal pressure. A shield case for microwave electromagnetic shielding is provided outside the system. The shield case includes a layer of pure aluminum and a layer of pyramids made of a microwave absorbing material. A manual hydraulic pump controls loading and unloading of a pressure loading device.

Abstract: Downhole tractor control systems and methods to maintain a load of a downhole tractor are disclosed. A method to maintain a load of a downhole tractor includes identifying a reduction of power of a first set of motors of a plurality of motors of the downhole tractor, determining whether the reduction of power of the first set of motors is below a first threshold, and increasing, in response to the determination, a first power limit of a second set of motors of the plurality of motors to a maximum acceptable power limit of the second set of motors while maintaining the load of the downhole tractor.

Abstract: A motor detection method includes the following steps. An excitation current command is provided to a motor device, and the motor device is driven to rotate at the first angle. The first feedback angle of the motor device in the first resting position is detected and obtained. The motor device is driven to rotate at the second angle according to the excitation current command. The second feedback angle of the motor device in the second resting position is detected and obtained. The magnetic pole offset angle of the motor device is calculated according to the first feedback angle and the second feedback angle.

Abstract: A method of estimating and compensating an interference torque of a lifting system includes steps of: continuously integrating a speed of a motor and specifying an integration value to be zero if the integration value is negative when the elevator car moves upward and downward in a hoist way; estimating a rope load constant of a wire rope according to an initial position and a maximum travel position, and calculating a rope load torque according to the maximum travel position, the rope load constant and a present position of the motor; estimating a car and counterweight load torque according to a car weight of the elevator car and a counterweight weight; estimating an interference torque according to the rope load torque and the car and counterweight load torque, and performing a feedforward compensation to the motor based on the interference torque.

Abstract: A fault detection method is used to determine whether a power switch coupled to a DC bus of a power conversion circuit is faulted. The method includes: detecting a bus voltage to provide a voltage signal and acquiring at least one detection value according to the voltage signal; providing control signals sequentially to turn off or turn on the power switch; determining that the power switch is a short-circuit fault if a first detection value is greater than or equal to a first threshold value when the power switch is turned off; determining that the power switch is an open-circuit fault if a second detection value is less than a second threshold value when the power switch is turned on; and providing an alarm signal or a disable signal when the power switch is the short-circuit fault or the open-circuit fault.

Abstract: Embodiments of the present disclosure provide a method and system for training a model by using training data. The training data includes a plurality of samples, each sample includes N features, and features in the plurality of samples form N feature columns, and the method includes: determining an importance value of each of the N feature columns; determining whether the importance value of each of the N feature columns satisfies a threshold condition; performing a dimension reduction on M feature columns to generate P feature columns in response to the determination that the importance values of the M feature columns do not satisfy the threshold condition, wherein M<N and P<M; merging (N?M) feature columns having importance values that satisfy the threshold condition and the generated P feature columns to obtain (N?M+P) feature columns; and training the model based on the training data including the (N?M+P) feature columns.

Abstract: Downhole tractor control systems and methods to adjust a load of a downhole motor to drive one or more wheels of the downhole tractor are disclosed. A method to adjust a load of a downhole motor includes receiving a user input of a desired speed and torque for a plurality of motors, where the plurality of motors powering rotation of wheels of a downhole tractor. The method also includes determining a minimum actual motor speed of the plurality of motors. For at least one motor of the plurality of motors, the method includes determining a power controller output and determining a torque controller output. The method further includes adjusting a voltage source invertor based on a lesser of the power controller output and the torque controller output to modulate voltage provided to the at least one motor.

Abstract: Downhole tractor control systems and methods to maintain a load among multiple tractors are disclosed. A method to adjust a load among multiple tractors includes receiving first power feedback of a first downhole tractor, receiving second power feedback of a second downhole tractor, identifying an unbalance load condition when a difference between the first power feedback and the second power feedback exceeds a predetermined threshold, and adjusting, in response to identifying the unbalance load condition and based on the difference, power reference of the first downhole tractor and the second downhole tractor.

Abstract: Downhole tractor control systems and methods to maintain a load of a downhole tractor are disclosed. A method to maintain a load of a downhole tractor includes identifying a reduction of power of a first set of motors of a plurality of motors of the downhole tractor, determining whether the reduction of power of the first set of motors is below a first threshold, and increasing, in response to the determination, a first power limit of a second set of motors of the plurality of motors to a maximum acceptable power limit of the second set of motors while maintaining the load of the downhole tractor.

Abstract: Downhole tractor control systems and methods to adjust a load of a downhole motor to drive one or more wheels of the downhole tractor are disclosed. A method to adjust a load of a downhole motor includes receiving a user input of a desired speed and torque for a plurality of motors, where the plurality of motors powering rotation of wheels of a downhole tractor. The method also includes determining a minimum actual motor speed of the plurality of motors. For at least one motor of the plurality of motors, the method includes determining a power controller output and determining a torque controller output. The method further includes adjusting a voltage source invertor based on a lesser of the power controller output and the torque controller output to modulate voltage provided to the at least one motor.