Abstract: A spirally ascending/descending cryogenic storage apparatus, comprising a cryogenic storage tank, the temperature in the cryogenic storage tank being continuously maintained at a certain deep cryogenic range. A driving component and a rotating storage rack are provided within the cryogenic storage tank. Multiple shelf boxes can be stored in the circumferential direction of the rotating storage rack. The driving component can drive the rotating storage rack to spirally ascent or spirally descent in the cryogenic storage tank. An access opening is provided on the cryogenic storage tank. The multiple shelf boxes can rotate to a position corresponding to the access opening with the movement of the rotating storage rack. The cryogenic storage tank is a liquid nitrogen tank. Liquid nitrogen is provided at the bottom part within the liquid nitrogen tank.

Abstract: Disclosed are a wireless remote control method and system for controllable rotary sliding guiding drilling. An upper end of a controllable rotary sliding guiding drilling mechanism is provided with a drill rod; and the wireless remote control system for controllable rotary sliding guiding drilling further comprises: an MWD arranged at a lower end of the controllable rotary sliding guiding drilling mechanism; a bent screw drill tool mounted at a lower end of the MWD; a drill bit mounted at a lower end of the bent screw drill tool, the drill bit being connected with the bent screw drill tool through a connector; and a clutch module mounted on the controllable rotary sliding guiding drilling mechanism, the clutch module comprising an electromagnetic valve, a processor, an internal pipe pressure sensor, an external pipe pressure sensor and a wireless data transmission module.

Abstract: Provided is a two-stage reverse-torque bent screw orientation tool. An existing bent screw orientation technology has the technical problems of large friction resistance, difficult control of a borehole track, a low drilling speed and the like, and restricts economic, safe and long-acting development of oil and gas. In order to solve the above problems, the two-stage reverse-torque bent screw orientation tool is invented and composed of a first-stage clutch mechanism and a second-stage clutch mechanism, and the first-stage clutch mechanism and the second-stage clutch mechanism are both composed of a battery, a battery compartment, a pressure sensor, an electromagnetic valve, a body, a plug, a piston, an outer tooth cylinder, an inner tooth cylinder, a transmission cylinder, a connecting cylinder, a bearing, a limiting cylinder, a lower joint, a thrust bearing, a battery compartment, a circuit board, a cover plate and the like.

Abstract: Embodiments of the present disclosure provide apparatus, methods and computer readable storage mediums for configuring resources for positioning reference signals. In one aspect, the apparatus determines a second set of resource configuration for positioning reference signal (PRS) mapping to resource elements in the second set, which is an extension of the first set of resource configuration for PRS mapping with additional resource elements. In another aspect, another apparatus determines configurations of at least one of the first set and the second set, to configure PRS transmission according to the first set or the second set.

Abstract: A charging pile is provided and includes a housing and a charging module; the housing defines an accommodating cavity, the housing defines an air inlet and an air outlet, the charging module is accommodated in the accommodating cavity, the charging module has a first side-surface and a second side-surface opposite to the first side-surface, and a third side-surface and a fourth side-surface opposite to the third side-surface, the air inlet is located at one side of the first side-surface away from the second side-surface, the air outlet is located at one side of the second side-surface away from the first side-surface, air enters the accommodating cavity through the air inlet, flows to the third side-surface along the first side-surface to flow into the charging module, flows out of the charging module from the fourth side-surface to the second side-surface, and flows out of the accommodating cavity through the air outlet.

Abstract: A lead-free solder alloy having a low melting temperature and low yield strength is disclosed. The solder alloy includes 5.0-20.0 wt. % of indium (In), 1.0-5.0 wt. % of silver (Ag), 0.25-2.0 wt. % of copper (Cu), 0.1-0.5 wt. % of zinc (Zn), and a remainder of tin (Sn). In implementations, a sulfur compound may be included in a concentration of 100 ppm to 500 ppm in the alloy to prevent oxidation of zinc and indium on the surface of the alloy. The solder alloy is particularly useful for but not limited to solder on pad applications in first level interconnect semiconductor device packaging.

Abstract: A lead-free solder alloy having a low melting temperature and low yield strength is disclosed. The solder alloy includes 5.0-20.0 wt. % of indium (In), 1.0-5.0 wt. % of silver (Ag), 0.25-2.0 wt. % of copper (Cu), 0.1-0.5 wt. % of zinc (Zn), and a remainder of tin (Sn). In implementations, a sulfur compound may be included in a concentration of 100 ppm to 500 ppm in the alloy to prevent oxidation of zinc and indium on the surface of the alloy. The solder alloy is particularly useful for but not limited to solder on pad applications in first level interconnect semiconductor device packaging.