Abstract: An electrostatic energy collector and an electrostatic energy collecting method. The electrostatic energy collector comprises: a vibrating table (101), the vibrating table being fixedly connected to a first end of a first cross beam (102) and a first end of a second cross beam (103), the first cross beam being parallel to the second cross beam, a vertical projection of the first cross beam being overlapped with that of the second cross beam, both of the first cross beam and the second cross beam being conductors, a first mass block (104) being fixedly arranged on the first cross beam, an electret layer (106) being coated at the side, close to the first cross beam, of the second cross beam, a second mass block (105) being fixed at the sided, facing away from the first cross beam, of the second cross beam, a first lead (107) being connected to the first cross beam and a first end of a load (109), and a second lead (108) being connected to the cross beam and a second end of the load.

Abstract: A monopole acoustic logging while drilling instrument used together with a bottom hole assembly and a method for measuring a shear wave velocity of slow formations, wherein the bottom hole assembly includes a drill collar and a drill bit, wherein the monopole acoustic logging while drilling instrument is installed on the drill collar. The monopole acoustic logging while drilling instrument comprises: an acoustic receiver array installed on the drill collar; a monopole acoustic source arranged at the drill collar, wherein the monopole acoustic source is configured to emit acoustic waves with a frequency in a preset frequency range, and the ratio of the outer diameter D1 of the drill collar to the outer diameter D2 of the drill bit is d, and 0.75<d<1.

Abstract: The technical solution of the present application is applicable to the technical field of geophysical exploration, and provides a surface wave prospecting method and an acquisition equipment. This method comprises: obtaining vibration data by a vibration collecting device; calculating a dispersion graph by applying a vector wavenumber transform method to the vibration data, extracting dispersion curves from the dispersion graph, wherein the dispersion curves include fundamental mode and higher modes of dispersion curves of surface wave; establishing an initial stratigraphic model according to the dispersion graph; and performing a dispersion curves inversion based on the initial stratigraphic model and an inversion algorithm.

Abstract: The present invention discloses a metal strip winding continuous reinforced thermoplastic composite pipe. The present invention adopts a method designed for grouping the winding metal strips to rationally distribute the winding mode of the metal strips, and at the same time, increases the hoop strength and axial strength of the pipe by using the feature of high strength of the metal strips, thereby improving the compressive capacity of the pipe; there is no bonding between the metal strip reinforcement layers, which improves the flexibility of the composite pipe and reduces the relative slippage between the metal strip layers; the production process is simple, and requirements for the equipment investment are small, thereby greatly reducing the manufacturing cost and ensuring the flexibility and seismic resistance of the pipeline.