Abstract: Disclosed are a method, apparatus and system for exporting and recharging a digital currency, which mainly relate to the technical field of computers. The method includes: receiving a generation request of a digital currency sent by a digital currency terminal, wherein the generation request indicates a first denomination of the requested digital currency and user information corresponding to the digital currency terminal (S101); determining, according to the user information, an available currency corresponding to the user information and a second denomination of the available currency (S102); generating, according to the available currency and the second denomination of the available currency, the digital currency corresponding to the user information and the first denomination, and recording a status of the digital currency as an export status (S103), and notifying the digital currency terminal of the digital currency in the export status (S104).

Abstract: A frequency-tunable film bulk acoustic resonator and a preparation method therefor are provided. The resonator includes a substrate, an air gap, a sandwiched structure formed by electrodes and piezoelectric layers, and an electrode lead-out layer, wherein the substrate is connected to the sandwiched structure formed by the electrodes and the piezoelectric layers, and a connection face of the substrate and the sandwiched structure formed by the electrodes and the piezoelectric layers is recessed towards inside of the substrate to form the air gap; and the electrode lead-out layer is connected to the sandwiched structure formed by the electrodes and the piezoelectric layers. The sandwiched structure formed by the electrodes and the piezoelectric layers includes a bottom electrode, piezoelectric layers, intermediate electrodes, and a top electrode, wherein the electrodes and the piezoelectric layers are alternately arranged to form the sandwiched structure.

Abstract: A plastic floor board processing technology using digital printing, aiming to solve the problem relating to the high production cost, comprising the steps of: preparing a base material; blending the base material; extruding the blended base material into a mold to form a stone-plastic base material; adjusting a gap between a surface embossing roll and a bottom embossing roll to enable the stone-plastic base material to pass through the gap; generating embossing patterns and positioning marks at equal intervals on a surface of the stone-plastic base material; cooling the stone-plastic base material; cutting the stone-plastic base material into plastic floorboards; using a digital printer to print the plastic floorboards. According to the present disclosure, patterns are directly printed on the surface of the stone-plastic base material, which avoids the processes of arranging a color film and a wear layer, lowers the production cost and improves the production efficiency.

Abstract: A method for processing floorboards using digital printing, comprising: preparing a base material layer; arranging a printing layer on the base material layer, wherein the printing layer is directly printed by a digital printing apparatus and is formed on a surface of the base material layer; and arranging a protection layer on the printing layer, wherein the protection layer is attached to the printing layer by means of one or a combination of processes selected from roll-coating, shower-coating, spray-coating, transfer-printing and printing, wherein the protection layer displays one or a combination of artistic effects selected from flat, sunken, raised, finely creased, patterned and crackled by means of one or a combination of processes selected from levelling, flatting, printing, embossing, corroding, carving, brushing and crackling.

Abstract: A method for forming a stereoscopic pattern of a plastic floorboard, comprising: positioning a base board on a digital printing unit, wherein the base board has an outer surface; using the digital printing unit to print pigment on the outer surface of the base board according to a preset pattern to form a pattern layer, wherein the pattern of the pattern layer corresponds to or does not correspond to the stereoscopic pattern; using a first forming unit to form a protection layer on the pattern layer with a transparent melt plastic raw material; and using a second forming unit to form the stereoscopic pattern having a concave-convex structure on the protection layer.

Abstract: A plastic floor board processing technology using digital printing, aiming to solve the problem relating to the high production cost, comprising the steps of: preparing a base material; blending the base material; extruding the blended base material into a mold to form a stone-plastic base material; adjusting a gap between a surface embossing roll and a bottom embossing roll to enable the stone-plastic base material to pass through the gap; generating embossing patterns and positioning marks at equal intervals on a surface of the stone-plastic base material; cooling the stone-plastic base material; cutting the stone-plastic base material into plastic floorboards; using a digital printer to print the plastic floorboards. According to the present disclosure, patterns are directly printed on the surface of the stone-plastic base material, which avoids the processes of arranging a color film and a wear layer, lowers the production cost and improves the production efficiency.

Abstract: A system and method for improving integrity of a cased wellbore. The method comprises identifying at least one weak plane corresponding to a highest probability of slip of fault within the open-hole wellbore. Further, the method comprises providing pressurized fluid into the open-hole wellbore to cause the slip of the fault by inducing tensile or shear failures within the open-hole wellbore along the at least one weak plane. The method also comprises restoring a shape of the open-hole wellbore after the slip of the fault by removing material from an inner surface of the open-hole wellbore, to provide a uniform or smooth cross-section along an elongate axis of the open-hole wellbore. The method further comprises arranging and cementing a casing along the restored open-hole wellbore to obtain the cased wellbore having improved integrity.

Abstract: The invention discloses a chamfered plastic floor. The chamfered plastic floor is formed by splicing a plurality of substrates, wherein at least one side edge of an upper surface of each substrate is provided with a surface descending portion; the surface descending portion is disposed along a length direction of the edge of the substrate; adjacent substrates are spliced at the surface descending portions to form a boundary area, and a surface of the boundary area is covered with an antifouling layer. The invention provides a chamfered plastic floor which not only can present the boundaries between adjacent floors, but also facilitates the cleaning of the boundary areas between adjacent floors.