6results about How to "Overcome volume" patented technology

The present invention relates to the technical field of soil sampling, and in particular to a soil sampling device and sampling method for geological exploration, including a support, a lower support, a pressure plate, an internal threaded sleeve, a drill rod, a sample push rod, etc.; the support is installed with a lower support, the lower support is slidably connected with a pressure plate, the pressure plate is rotatably connected with an internal threaded sleeve, the internal threaded sleeve is threadedly connected with a drill rod, the internal threaded sleeve is slidably connected with a sample push rod, and the sample push rod is used to push out the soil sample in the drill rod. The device can automatically realize the drilling in and out of the drill rod and the pushing out of the soil sample, the operation is simple and labor-saving, and the power of the driving source can be selectively transmitted to different positions to realize different functions.

The invention provides a zinc-doped aluminum oxide-metal lithium composite negative electrode and a preparation method thereof, and belongs to the field of lithium battery negative electrodes. The method comprises the steps that an HEDP solution serves as an electrolyte, a pretreated aluminum sheet serves as an anode, and an oxidation film is formed on the surface of the aluminum sheet through constant-current gradient anodic oxidation; the aluminum sheet is arranged at the bottom of a tank and buried in zinc impregnation powder for hot zinc impregnation, and a zinc-doped aluminum substrate with a zinc impregnation face is obtained; coating the sherardizing surface with resin, polishing the back surface of the sherardizing surface to remove an oxidation film and expose an aluminum base, and welding an aluminum wire to form a lead; a NaCl solution is adopted as an electrolyte, the zinc-doped aluminum substrate is adopted as an anode, constant-voltage electrolysis is performed to achieve membrane-substrate separation, after current returns to zero, the aluminum substrate is taken out, resin is removed, and zinc-doped aluminum oxide with a three-dimensional porous framework is obtained; and molten lithium is in contact with the edge of the zinc-doped aluminum oxide for 3-5 min. According to the invention, the zincizing alumina film is integrated into the battery negative electrode as a three-dimensional porous skeleton, so that the problems of obvious volume fluctuation and lithium dendrite growth of the existing lithium battery negative electrode in charge-discharge circulation are solved.

The present invention provides an integrated optical filter, comprising: an input optical waveguide connected to a first port of an input curved grating-assisted reverse coupler of a micro-ring optical filter with an integrated grating-assisted reverse coupler in a filtering unit, for inputting an optical signal to be processed; a filtering unit comprising a micro-ring optical filter with an integrated grating-assisted reverse coupler and a reverse coupler, for filtering the optical signal, wherein a second port of the input curved grating-assisted reverse coupler of the micro-ring optical filter is connected to a first intermediate optical waveguide; a fourth port of an output curved grating-assisted reverse coupler of the micro-ring optical filter is connected to the first intermediate optical waveguide through a waveguide crossing; a third port of an output curved grating-assisted reverse coupler of the micro-ring optical filter is connected to a straight input periodic corrugated waveguide of the reverse coupler through a second intermediate optical waveguide; and an output optical waveguide, for outputting the filtered optical signal.

This invention discloses a method for determining the volume of a single standing tree based on a backpack-mounted lidar, belonging to the field of forestry surveying and remote sensing technology. During system operation, the three-dimensional point cloud acquired by the backpack-mounted lidar is preprocessed, a unified coordinate system is established, and non-terrestrial point clouds are extracted. Individual tree segmentation is achieved by combining density peak clustering and vertical profile connectivity analysis, obtaining individual tree point cloud clusters. Equally spaced evaluation layers are divided along the tree height direction, and the effective point density, azimuth coverage, and normal vector consistency of each layer are calculated to determine the data reliability level. A high-reliability layer is selected, and weighted least squares circle fitting is used to obtain the center and radius of the cross-section, which are then used as observation constraints. Typical trunk tapers of the same tree species and age group are introduced as morphological priors. The optimal parameterized surface model is solved through Bayesian inference, and finally, the volume of a single standing tree is calculated by integrating the Huber formula.

The invention belongs to the technical field of traffic infrastructure underground disease detection, and particularly relates to an underground cavity detection and filling quality safety assessment method based on elastic wave exploration. Comprising the following steps: step 1, arranging elastic wave exploration survey lines along the longitudinal direction and the transverse direction of a target area, simultaneously extracting three feature values of reflection intensity, two-way travel time and instantaneous spectral bandwidth for each voxel to identify a cavity area, dividing injection and filling subareas through three-dimensional connected domain search, and determining a target filling volume of each injection and filling subarea; and 2, after filling media are injected into all the cavity areas, the filling effect is evaluated in combination with settlement monitoring, and a differential inspection management scheme is formulated. According to the invention, cavity refined partition identification based on elastic wave exploration, quantitative evaluation of filling quality and differentiated inspection management of multi-source data fusion are realized.

The present application discloses a power converter and a control method thereof. The power converter includes a rectifier bridge, an energy storage capacitor, and a capacitor access control circuit. The capacitor access control circuit disconnects the energy storage capacitor when the rectified voltage reaches a peak value, and reconnects the energy storage capacitor when the rectified voltage drops to a preset value, so that the energy storage capacitor is always kept at the highest energy storage and is only connected to the energy storage capacitor for discharge when necessary, thereby reducing the use of the energy storage capacitor, greatly reducing the capacitance of the energy storage capacitor with the same voltage rating, and using small-capacity and long-life capacitors such as film capacitors or ceramic capacitors, overcoming the defects of large volume and short service life of using electrolytic capacitors as energy storage capacitors, and having the advantages of significantly improving the power density of the power supply and extending the life of the converter.