Abstract: CLLC resonant converters using full-bridge (FB) and half-bridge (HB) soft-morphing techniques are disclosed. Two forms of soft-morphing are provided: type1, steady-state rotational soft-morphing, which ensures balanced power loss and thermal stress across all power switches, and type2, dynamic soft-morphing, which facilitates smooth transitions between FB-FB, FB-HB, and HB-FB modes. Consequently, the FB CLLC resonant converter can achieve a 16× ultra-wide voltage gain range.

Abstract: In an aspect of the disclosure, an operation method, for balancing voltage of capacitors of a bridge circuit of a multi-level LLC resonant converter, includes: measuring voltages of the capacitors of the bridge circuit, an output voltage and an output current of an output load the multi-level LLC resonant converter, and an input voltage of the bridge circuit; selecting a voltage-level zone of a required output voltage of the bridge circuit according to the output voltage of the output load, and the input voltage of the bridge circuit; selecting a circuit mode, with a highest value of the required output voltage; and outputting PWM signals corresponding to the circuit mode, with a switching frequency, to switches of the plurality of capacitor-switch modules.

Abstract: A distributed generation unit (DGU) is provided. The DGU includes a meter and a processor. The meter generates a per-unit current based on the rated power value of the DGU. The processor is coupled between a control area network (CAN) bus and the circuit block. The processor causes the DGU to identify a first electrical signal at an initial time and perform a master selection process. The master selection process includes determining the delay time based on the per-unit current and the maximum per-unit current, identifying the per-unit current as the maximum per-unit current when the delay time has elapsed since the initial time, and broadcasting the maximum per-unit current and a second electrical signal through the CAN bus. The processor is further configured to perform a droop coefficient regulation process to maintain the current state of the DGU after the second electrical signal is broadcast.

Abstract: The present invention relates to CRISPR/Cas-based biosensing materials, assays and methods. In particular the technology relates to ultrasensitive CRISPR/Cas-based methods suitable for microbial detection, detection of cells or cellular components, small molecules, cytokines, polypeptides and various other biomarkers. The materials and methods according to the invention may also be used to enhance the sensitivity of existing bioassays.

Abstract: A combined catalytic viscosity reducing system includes a catalyst slug, a heat generating system slug, a gas injection slug, and a water-soluble viscosity reducing system slug. The catalyst slug includes 10%-15% of azacarbene iron, 15%-30% of tert-butyl hydroperoxide, 2%-5% of phosphoric acid, 2%-5% of hydrogen donor, and 0.5%-1% of emulsifier agent, and the others are solvent. The heat generating system slug includes 10%-30% of NaNO2, 8%-25% of NH4Cl, and 3%-10% of acid initiator, and the others are water, totaling 100%. The water-soluble viscosity reducing system slug, according to mass percentage, includes 0.2%-0.5% of surfactant and 2%-10% of alkali, and the others are water. The combined catalytic viscosity reducing system can effectively reduce viscosity without injecting steam, and the viscosity reduction rate can reach 96.5%.

Abstract: Disclosed is catalyst composition, a process for preparing the catalyst composition, and a use of the catalyst composition. The catalyst composition comprises 1 wt % to 4 wt % of free azacarbene, 1 wt % to 2 wt % of azacarbene iron, 15 wt % to 30 wt % of a phase transfer catalyst, 1 wt % to 5 wt % of a hydrogen donor, 5 wt % to 10 wt % of phosphoric acid, 0.5 wt % to 1 wt % of emulsifier, with the rest being solvent. This disclosure also provides a process for preparing the catalyst composition, comprising: mixing the free azacarbene and the azacarbene iron with the solvent according to a ratio, then adding and mixing the phase transfer catalyst and the hydrogen donor, then adding and mixing the phosphoric acid and the emulsifier to obtain the catalyst composition. The beneficial effect of this disclosure is: only less azacarbene iron and free azacarbene are needed to achieve rapid and efficient viscosity reduction of heavy oil.

Abstract: A quality assessment method for automatic annotation of speech data is provided and includes: building a base rule-base of automatically annotated speech data based on quality key indicators; reading automatically annotated speech data to be detected, and performing quality detection on the automatically annotated speech data to be detected according to the quality key indicators to thereby complete quality measurement; updating an automatically annotated speech dataset according to a result of the quality measurement; and importing the automatically annotated speech dataset after the updating into the base rule-base. The shortcomings of using traditional quality assessment methods for data annotation in automatic machine annotations can be overcome, and it can play a very positive supporting role in promoting the development of ethnic minority speech intelligence.

Abstract: A steel reinforced concrete column for a high rise building comprises a plurality of hot-rolled steel sections extending longitudinally through the concrete column. Each of these steel sections has an outward flange with an outer surface turned outwards in the concrete column, an opposite inward flange with an outer surface turned inwards in the concrete column, and a web connecting the outward flange to the inward flange. The steel sections are arranged in the concrete column so that the outer surfaces of their inward flanges at least partially delimit therein a central concrete core with n lateral sides and a transversal cross-section that forms an n-sided polygon, n being at least equal to three, and each of then lateral sides of the central concrete core being coplanar with the outer surface of the inward flange of at least one steel section.

Abstract: A tea impurity data annotation method based on supervised machine learning is provided. In particular, a feature vector of tea and impurity is first extracted by using a traditional image processing method, each element in the feature vector then is added with a corresponding annotation bit, a training dataset and a test dataset subsequently are divided by using a manual discrimination method, and afterwards data annotation is performed on each feature element in the test dataset. The manual method and the supervised machine learning method are combined, which can improve the accuracy and ensure the work efficiency.

Abstract: Disclosed is catalyst composition, a process for preparing the catalyst composition, and a use of the catalyst composition. The catalyst composition comprises 1 wt % to 4 wt % of free azacarbene, 1 wt % to 2 wt % of azacarbene iron, 15 wt % to 30 wt % of a phase transfer catalyst, 1 wt % to 5 wt % of a hydrogen donor, 5 wt % to 10 wt % of phosphoric acid, 0.5 wt % to 1 wt % of emulsifier, with the rest being solvent. This disclosure also provides a process for preparing the catalyst composition, comprising: mixing the free azacarbene and the azacarbene iron with the solvent according to a ratio, then adding and mixing the phase transfer catalyst and the hydrogen donor, then adding and mixing the phosphoric acid and the emulsifier to obtain the catalyst composition. The beneficial effect of this disclosure is: only less azacarbene iron and free azacarbene are needed to achieve rapid and efficient viscosity reduction of heavy oil.

Abstract: Disclosed is a combined catalytic viscosity reducing system and a use of the combined system. The combined catalytic viscosity reducing system comprises four slugs, the four slugs are a catalyst slug, a heat generating system slug, a gas injection slug, and a water-soluble viscosity reducing system slug; the catalyst slug includes 10%-15% of azacarbene iron, 15%-30% of tert-butyl hydroperoxide, 2%-5% of phosphoric acid, 2%-5% of hydrogen donor, and 0.5%-1% of emulsifier agent, and the others are solvent; the heat generating system slug includes 10%-30% of NaNO2, 8%-25% of NH4Cl, and 3%-10% of acid initiator, and the others are water, totaling 100%; the water-soluble viscosity reducing system slug, according to mass percentage, includes 0.2%-0.5% of surfactant and 2%-10% of alkali, and the others are water. The combined catalytic viscosity reducing system can effectively reduce viscosity without injecting steam, and the viscosity reduction rate can reach 96.5%.

Abstract: A nut leadscrew type automatic door opening and closing mechanism, an automobile automatic door, and an automobile. The nut leadscrew type automatic door opening and closing mechanism includes a driving device, a gearbox, a nut gear, and a leadscrew. The driving device is fixedly connected to a door, the gearbox is hinged to the door, and the nut gear is disposed in the gearbox. One end of the leadscrew is hinged to a vehicle body, and the other end extends in an axial direction. The nut gear is sleeved on the leadscrew, and the driving device is configured to drive the nut gear to rotate, so that the nut gear is reciprocally linearly movable along the leadscrew to push the door to open or close relative to the vehicle body.

Abstract: A nut leadscrew type automatic door opening and closing mechanism for moving a door of a motor vehicle relative to a vehicle body. The nut leadscrew type automatic door opening and closing mechanism includes a driving device, a leadscrew, a nut pushing block and a pushing rod. The driving device is fixedly connected to a door, the leadscrew is rotatably mounted on the door, the nut pushing block is sleeved on the leadscrew, a first end of the pushing rod is hinged to the nut pushing block, and a second end of the pushing rod is hinged to the vehicle body. The driving device is capable of driving the leadscrew to rotate, so as to allow the nut pushing block and the pushing rod to be reciprocally linearly movable along the leadscrew to allow the pushing rod to drive the door to open or close relative to the vehicle body.

Abstract: An OLED display substrate, a method of manufacturing the OLED display substrate, and a display device are provided. The OLED display substrate includes a plurality of aperture regions arranged in an array on a base substrate; and a plurality of storage capacitors on the base substrate, an orthographic projection of each storage capacitor of the plurality of storage capacitors on the base substrate having an overlapping region with an orthographic projection of an aperture region corresponding to the storage capacitor in the plurality of aperture regions on the base substrate.

Abstract: A quality assessment method for automatic annotation of speech data is provided and includes: building a base rule-base of automatically annotated speech data based on quality key indicators; reading automatically annotated speech data to be detected, and performing quality detection on the automatically annotated speech data to be detected according to the quality key indicators to thereby complete quality measurement; updating an automatically annotated speech dataset according to a result of the quality measurement; and importing the automatically annotated speech dataset after the updating into the base rule-base. The shortcomings of using traditional quality assessment methods for data annotation in automatic machine annotations can be overcome, and it can play a very positive supporting role in promoting the development of ethnic minority speech intelligence.

Abstract: The present invention discloses a method for splicing vector polygon regions with holes, comprising the steps of: acquiring any two vector polygon regions A1 and A2 to be spliced, the outer frame P1 of A1 and the outer frame P2 of A2; judging whether P1 and P2 have overlapping parts; storing the connection relationship of the non-overlapping edges and the non-overlapping edges of P1 and P2 in a data table T; performing intersection on the overlapping edges of P1 and P2 and storing the overlapping edges in the data table T; traversing the data table T, finding the connection relationship of edges, and constructing the splicing of vector polygon regions. According to the scheme, the present invention has the advantages of wide application range, high splicing efficiency and the like, and has high practical value and popularization value in the technical field of vector graphics splicing.

Abstract: An OLED display substrate, a method of manufacturing the OLED display substrate, and a display device are provided. The OLED display substrate includes a plurality of aperture regions arranged in an array on a base substrate; and a plurality of storage capacitors on the base substrate, an orthographic projection of each storage capacitor of the plurality of storage capacitors on the base substrate having an overlapping region with an orthographic projection of an aperture region corresponding to the storage capacitor in the plurality of aperture regions on the base substrate.

Abstract: The present disclosure relates to a nut leadscrew type automatic door opening and closing mechanism, an automobile automatic door and an automobile. The nut leadscrew type automatic door opening and closing mechanism includes a driving device, a leadscrew, a nut pushing block and a pushing rod, wherein the driving device is fixedly connected to a door, the leadscrew is rotatably mounted on the door, the nut pushing block is sleeved on the leadscrew, a first end of the pushing rod is hinged to the nut pushing block, a second end of the pushing rod is hinged to a main body, the driving device is capable of driving the leadscrew to rotate, so as to allow the nut pushing block and the pushing rod to be reciprocally linearly movable along the leadscrew, and then allow the pushing rod to drive the door to open or close relative to the main body.

Abstract: The present disclosure relates to a nut leadscrew type automatic door opening and closing mechanism, an automobile automatic door, and an automobile. The nut leadscrew type automatic door opening and closing mechanism includes a driving device, a gearbox, a nut gear, and a leadscrew, wherein the driving device is fixedly connected to a door, the gearbox is hinged to the door, and the nut gear is disposed in the gearbox, one end of the leadscrew is hinged to a main body, the other end extends in an axial direction, the nut gear is sleeved on the leadscrew, and the driving device is configured to drive the nut gear to rotate, so that the nut gear is reciprocally linearly movable along the leadscrew to push the door to open or close relative to the main body.