Abstract: A method for converting state space representation (SSR) information to observation space representation (OSR) information includes: obtaining the SSR information, obtaining the OSR information, obtaining information of a virtual observation distance, and obtaining delay information of a troposphere and delay information of an ionosphere. A device for converting SSR information to OSR information includes: a satellite antenna, a global navigation satellite system (GNSS) board, a radio antenna, a mobile network module and antenna, a Bluetooth module and antenna, a Wi-Fi module and antenna, a status indicator light, a plurality of output interfaces, and a power supply unit. A conversion algorithm is realized for converting SSR information to OSR information, and the converted OSR information follows the international standard protocols and can be received by most GNSS receivers. A conversion device is developed based on the aforementioned method.

Abstract: A high-frequency composite impactor including a high-frequency axial and a torsional impact assembly is disclosed. The high-frequency axial impact assembly includes an upper self-excited oscillation cavity, a lower self-excited oscillation cavity, an adjustment block and a lock nut. The torsional impact assembly includes an upper end cover, a reversing switch, a pendulum, a lower shell, a lower end cover, a nozzle, a connecting block and a retaining ring. The high-frequency axial impact assembly converts the flowing drilling fluid into a pulsed jet to achieve a high-frequency axial impact. The torsional impact assembly enables a torsional impact through a shunt, and finally enables a high-frequency composite impact, which can effectively reduce the stick-slip of the drill string, jump drilling and other downhole accidents. By reducing the friction between the drill string and the borehole wall, the impactor can reduce WOB loss, increase the ROP, and improve the drilling efficiency.

Abstract: An integrated grain drying/storage/regulating bin with a built-in bellows and an externally disposed compartment comprises an integrated bin body, a grain distributing device, an external compartment outside the integrated bin body, an internal bellows inside the integrated bin body, a heating device, a refrigerating device, a humidifying device, an air flow distributing device, a centrifugal fan, and an air flow control valve. The merits of the present invention are: (1) being able to prevent the occurrence of moisture condensation; (2) facilitating production cost reductions; (3) uniformly heating and drying the grains in the bin; (4) being capable of preventing the filter for the grain layers in the bin from blockage or short circuit caused by spontaneous grain grading; (5) being able to implement low temperature or quasi-low temperature storage; and (6) being capable of enhancing grain toughness, lowering breakage rate, and increasing production yield and product quality.

Abstract: The present application discloses a negative-pressure continuous grain dryer with a built-in heating device, wherein the negative-pressure continuous grain dryer comprises a dryer bin, a heating device, and a centrifugal fan. Several levels of the heating devices are disposed from top to bottom in the dryer bin. A grain mixing device is provided below the heating device at each level. Outside the bin, an auxiliary heating device and a natural air inlet are provided in correspondence with the heating device at each level. The auxiliary heating device and the natural air inlet communicate with the grains and the respective heating device in the dryer bin through a perforated baffle plate. The centrifugal fan communicates with each of moisture exhaust vents at each level through an air duct.

Abstract: An application programming interface (API) may receive high level file commands and implement those commands using the storage mechanism on a smart card. The smart card may have a processor and storage mechanism and may communicate to a host device using a packet based communication protocol, such as ADPU. The API may translate the high level file commands into one or more ADPU commands, communicate with the smart card, receive APDU responses, and translate the responses into high level file commands. A high level file command may allow access to a file using long file names, a hierarchical directory structure, and may allow creating, writing, reading, and deleting a file. Some embodiments may have more complex functions for navigating and manipulating a hierarchical directory structure, as well as defining metadata including access privileges and file types to individual files.