Abstract: Disclosed is a method for evaluating thicknesses of cobalt-rich crusts on seamounts, which comprises following steps: dividing a study area of cobalt-rich crusts into geological grid units, assigning crust thickness values to geological grid units; obtaining the crust thicknesses of the geological sampling stations in a preset influence range in the adjacent areas based on geological sampling station information; estimating the crust thicknesses in a certain distance range of the stations by a “distance-slope” spatial interpolation method, and through a spatial similarity of a crusts spatial distribution caused by a relationship between the distance and the slope, assigning values to grid units outside adjacent areas and within an influence range of the spatial similarity relationship; assigning values to the geological grid units that failed to obtain crust thickness value through an expected assignment method, and obtaining the crust thicknesses of the study areas.

Abstract: A method for growing bulk boron arsenide (BA) crystals, the method comprising utilizing a seeded chemical vapor transport (CVT) growth mechanism to produce single BAs crystals which are used for further CVT growth, wherein a sparsity of nucleation centers is controlled during the further CVT growth. Also disclosed are bulk BAs crystals produced via the method.

Abstract: The present invention relates to a parallel robot system, including: a control apparatus; a parallel robot, including a mounting base, a moving platform, and a driving apparatus arranged between the mounting base and the moving platform, where the driving apparatus is configured to drive the moving platform to make multi-degree-of-freedom movement relative to the mounting base, and the driving apparatus receives a control signal from the control apparatus; a tracer, arranged on the moving platform; a passive arm, where the mounting base of the parallel robot is connected to one end of the passive arm; and an optical positioning and tracking apparatus, configured to track a spatial position of the tracer in real time and to send spatial position data of the tracer to the control apparatus.

Abstract: A method and application of flash imaging lidar to measure the attenuation coefficient of water bodies are provided. In this novel method, the real time remote measurements are achieved on the attenuation coefficient of fresh water using flash imaging lidar based on the adjacent frame difference (AFD) method and water body backscattering model. The method solves the problems of low accuracy and high error of data obtained from real-time remote sensing measurement of attenuation coefficients of water bodies in the prior art; the slow speed of measurement data obtained when measuring water bodies, and the poor feasibility and reliability effect of the remotely measured attenuation coefficients of water bodies obtained. The experimental and theoretical analyses fully illustrate the feasibility of real-time remote sensing measurement of the attenuation coefficient of water bodies using the AFD method, which has a strong practical value.

Abstract: The present invention relates to a robotic arm, including: an upper arm and a front arm; a first joint structure, by which the upper arm and the front arm are articulated together; a second joint structure, arranged at an end of the upper arm and/or an end of the front arm; a first driving mechanism, arranged in the upper arm; and a second driving mechanism, arranged in the front arm, where the first joint structure includes a first force amplification apparatus and a first locking element, the second joint structure includes a second force amplification apparatus and a second locking element, and the first driving mechanism and the second driving mechanism apply an acting force to the first locking element and/or the second locking element by the first force amplification apparatus and/or the second force amplification apparatus.

Abstract: Provided are a recombinant strain with modified gene BBD29_14900, and a method for constructing the same and use thereof, with the production of L-glutamic acid as a specific application. Further provided is a method for introducing a point mutation into the BBD29_14900 gene coding sequence in Corynebacterium or improving the expression thereof. The method can cause a bacterial strain with the mutation to increase the fermentation yield of glutamic acid. The point mutation involves a mutation of the base at position 1114 in the sequence of the BBD29_14900 gene from guanine (G) to adenine (A), and thus a substitution of aspartic acid at position 372 in the coded corresponding amino acid sequence with asparagine.

Abstract: A recombinant strain with modified gene BBD29_11265 and a method for constructing the same are provided. The recombinant strain is a bacterium that generates L-glutamic acid, and has an improved expression of a polynucleotide encoding an amino acid sequence of SEQ ID NO: 3 or a homologous sequence thereof; the improved expression can be having a point mutation in, and an enhanced expression of the polynucleotide encoding an amino acid sequence of SEQ ID NO: 3 or a homologous sequence thereof. A genetically engineered bacterium in which the base at position 70 in the BBD29_112665 gene sequence is mutated to adenine from guanine, causing alanine at position 24 in the coded corresponding amino acid sequence to be substituted with threonine, and an engineered bacterium overexpressing the BBD29_112665 gene or BBD29_11265G70A gene are constructed in the present invention, facilitating an increase in the production and conversion rate of L-glutamic acid.

Abstract: The present invention discloses a pipeline automatic scale removal and storage device. The device comprises a scale remover, a scale storage device and a coupling; the scale remover is composed of a scale breaking mechanism, a cutting mechanism and a grinding mechanism; a plurality of groups of scale breaking teeth of the scale breaking mechanism can preliminarily break scale on an inner wall of a pipeline; the cutting mechanism cuts and eliminates the scale on the inner wall of the pipeline through a plurality of installed cutting blades; and a plurality of groups of grinding blocks of the grinding mechanism further grind and eliminate the scale on the pipeline; and the scale storage device is used for realizing storage for the scale. The scale storage device is hermetically and movably installed in the pipeline. The device of the present invention can automatically thoroughly eliminate the scale in the pipeline.

Abstract: The present invention discloses a pipeline automatic scale removal and storage device. The device comprises a scale remover, a scale storage device and a coupling; the scale remover is composed of a scale breaking mechanism, a cutting mechanism and a grinding mechanism; a plurality of groups of scale breaking teeth of the scale breaking mechanism can preliminarily break scale on an inner wall of a pipeline; the cutting mechanism cuts and eliminates the scale on the inner wall of the pipeline through a plurality of installed cutting blades; and a plurality of groups of grinding blocks of the grinding mechanism further grind and eliminate the scale on the pipeline; and the scale storage device is used for realizing storage for the scale. The scale storage device is hermetically and movably installed in the pipeline. The device of the present invention can automatically thoroughly eliminate the scale in the pipeline.

Abstract: Various embodiments of the teachings herein include a gearbox adapter. For example, some embodiments include an adapter body with an internal cavity, a first end having a gearbox connection structure connecting the adapter body to a gearbox body, a first shaft hole in an end face of the first end providing communication between the internal cavity and an outside of the adapter body, and a second end having an opening in communication with the internal cavity; a transmission shaft configured to extend from the outside into the internal cavity via the opening and then out of the adapter body through the first shaft hole; an opening cover with a second shaft hole, the opening cover fitted at the second end to block the opening but allow the transmission shaft to pass out of the internal cavity through the second shaft hole; and a rotating bearing arranged in the internal cavity and fitted to the transmission shaft to support the transmission shaft.

Abstract: Provided is a board-to-board socket, including a socket body, socket terminal, and socket strengthener. The socket body includes a bottom wall, socket side walls, socket guide parts formed at lateral ends of the socket body, and an island part protruding upwards from the bottom wall. Socket guide parts each include a plug guide part receiving cavity, longitudinal outer peripheral wall, and lateral outer peripheral walls. The socket strengthener includes a main body part, lateral outer peripheral wall, and elastic arm parts. Tops of the elastic arm parts bend and extend towards longitudinal outer sides to form hitching part cavities hitched on top faces of the lateral outer peripheral walls.

Abstract: An electrical resistivity tomography prospecting system based on random distribution of electrodes is provided. The system comprises a central console and a plurality of data collection units. The central console and the data collection units are connected via wireless communication. The data collection units comprises a collection station and two electrodes connected via a cable. The electrodes may be randomly arranged based on the grounding condition. The GPS equipped on the electrode may provide the location information of the measurement point. The collection station is controlled by the central console, and may perform in two work modes: current supply measurement or electrical potential measurement. The data collection is parallel. Sequentially selecting one collection unit for current supplying, while the rest of collection units work for potential measurement.

Abstract: Methods, apparatus, computer program products for improving performance of a web-based application are provided. The method comprises receiving, by one or more processing units, HTTP requests sent from the web-based application; selecting, by one or more processing units, some of the HTTP requests from the received HTTP requests; encapsulating, by one or more processing units, the selected HTTP requests into one or more data frames of a full-duplex communication protocol; and sending, by one or more processing units, the one or more data frames to a server that the web-based application is communication with via a communication channel established based on the full-duplex communication protocol.

Abstract: The present disclosure discloses a method for identifying ice crystal fabric and distribution characteristics of ice flow field in ice sheet based on polarimetric radar. Because there is a correlation between the second-order fabric azimuth tensor and the dielectric constant tensor of the ice crystals inside the ice sheet, the present disclosure obtains the dielectric constant tensor of each reflection layer inside the ice sheet and its rotation angle from the polarimetric radar echo signal by the layer-by-layer recursive method, and then calculates to obtain the characteristic value of the second-order fabric orientation tensor and identifies its fabric type. After that, according to the correlation among the fabric, stress deformation and the ice flow to extract the information of ice flow direction and its spatial distribution characteristics.

Abstract: An electrical resistivity tomography prospecting system based on random distribution of electrodes is provided. The system comprises a central console and a plurality of data collection units. The central console and the data collection units are connected via wireless communication. The data collection units comprises a collection station and two electrodes connected via a cable. The electrodes may be randomly arranged based on the grounding condition. The GPS equipped on the electrode may provide the location information of the measurement point. The collection station is controlled by the central console, and may perform in two work modes: current supply measurement or electrical potential measurement. The data collection is parallel. Sequentially selecting one collection unit for current supplying, while the rest of collection units work for potential measurement.

Abstract: The present disclosure discloses a method for identifying ice crystal fabric and distribution characteristics of ice flow field in ice sheet based on polarimetric radar. Because there is a correlation between the second-order fabric azimuth tensor and the dielectric constant tensor of the ice crystals inside the ice sheet, the present disclosure obtains the dielectric constant tensor of each reflection layer inside the ice sheet and its rotation angle from the polarimetric radar echo signal by the layer-by-layer recursive method, and then calculates to obtain the characteristic value of the second-order fabric orientation tensor and identifies its fabric type. After that, according to the correlation among the fabric, stress deformation and the ice flow to extract the information of ice flow direction and its spatial distribution characteristics.

Abstract: A system is disclosed for configuring a motor controller using a one-click configuration scheme, simplifying the process of motor configuration in drives and similar devices. The system includes a specify component, a display component, and a single-action identification and configuration component. The specify component specifies a motor in communication with the motor controller. The display component displays information on the status of the motor controller. The single-action identification and configuration component, in response to performance of only a single action (i.e., a single-click or equivalent starting signal), performs an identification and configuration sequence for the motor comprising at least three identification steps to establish a single parameter for driving the motor. The at least three identification steps can include measurements of system parameters, noise, and resonance. The recommend bandwidth for motor operation can be selected from within a range of permissible bandwidths.

Abstract: A field oriented control (FOC) system and method provides smooth field-oriented startup for three-phase sensorless permanent magnet synchronous motors (PMSMs) despite the absence of load information. The system uses the rotor flux projection on the d- or q-axis to determine whether the stator flux current reference being applied during reference startup phase is sufficient to spin the PMSM, thereby providing smooth operation during the reference startup phase and saving energy relative to applying rated current. The system also determines a suitable initial value for the stator torque current reference to use at the start of closed-loop sensorless FOC control mode based on an angle difference between the reference and estimated angles. Since this angle difference is reflective of the load on the PMSM, the selected initial value allows the system to achieve a smooth transition from reference startup mode to closed-loop sensorless FOC control mode.

Abstract: A system parameter identification system uses a combination of relay control and sinusoidal injection to derive accurate estimates of system parameters of a controlled system or process while satisfying the rate-limit associated with some control applications. The system uses rate-limited relay control with hysteresis to place the system in oscillation. The system then switches the control signal from relay-based control to open-loop sinusoidal control using oscillation frequency, amplitude, and phase information obtained during the relay control stage. During the sinusoidal control phase, the plant output passes through a bandpass filter at the oscillation frequency to get a clean sinusoidal signal. The phase difference between the input and output signals and the output/input amplitude ratio are then obtained and used to calculate of the system parameters.

Abstract: A motion control design system implements a performance specification-oriented design approach. The system allows a designer to define desired performance specifications that are to be satisfied by a motion system, and determines tuning parameters (e.g., controller bandwidth and associated tuning parameters) that will yield performance within the defined performance specifications. An identification process identifies system parameters of interest based on collected system data. After the user has entered the desired performance specifications, an optimization process determines a range of bandwidths that will satisfy all specified performance requirements, and selects an optimal bandwidth within this range. A tuning process generates the corresponding tuning parameters for a systematically designed motion controller.