36 results about "Compound key" patented technology

The invention constructs a novel compound public key CPK system on the basis of simple marked keys in a combined public key CPK system; wherein, digital signature keys are compounded by marked keys and random keys; the random keys are compounded with update keys; the three types of keys are compounded into the digital signature keys; key exchange keys are compounded by the marked keys and system keys; the system keys is compounded with annual keys; the three types of keys are compounded into the key exchange keys. The random keys and the system keys enhance the security of the marked keys, and the update keys and the annual keys provide convenience for the key exchange; the advantages and characteristics of the combined keys are reserved in the compound keys; a combination matrix which is taken as a trust root provides evidences for the integration of marks and keys without the proof from a third party. The compound public key system greatly enhances the security degree and permits the definition of the signature keys in the name of individual so as to be widely applied to the fields of trusted connection, code authentication, electronic banks, trusted transaction, trusted logistics, etc.

An aspect includes a computer-implemented method for detecting one or more multi-column composite key column sets. The method includes accessing(102) a plurality of first columns(P1-P3), each first column representing a parameter, each first column including a set of distinct parameter values of its respective parameter, each distinct parameter value being stored in association with one or more object identifiers. Two or more of the first columns are selected(104) for use as a current candidate column set, the current candidate column set including at least a first and a second candidate column (112), the current candidate column set being of a current cardinality. The method also includes determining(106), by comparing object-identifiers, whether for the current candidate column set at least one couple of parameter values(219) exists with parameter values respectively stored in association with two or more shared ones of the object identifiers to identify a multi-column composite key column set.

The invention relates to an integrated super-discharge energy-dissipation flood-overflowing unit. The unit comprises an inlet overflow weir, wherein a chute is formed in the downstream of the inlet overflow weir; a water-falling energy dissipater is formed in the chute; the inlet overflow weir is a compound key overflow weir; the compound key overflow weir comprises a weir body; a forward triangular pier and a reverse triangular pier with horizontal bottom surfaces are staggered at the top of the weir body; the length in the water flow direction of the bottom surfaces of the positive triangular pier and the reverse triangular pier exceeds the thickness of the top end of the weir to form a weir front cantilever and a weir rear cantilever; a partition is arranged between the positive triangular pier and the reverse triangular pier. Compared with the conventional overflow weir, the compound key overflow weir has the advantages that the flow coefficient is remarkably increased; water heads acting on the weir are obviously reduced, so that a condition of heightening the dam for dealing with the exceeding flood caused by dam break and extreme climate. The integrated super-discharge energy-dissipation flood-overflowing unit is simple in structure and low in upgrading, improving and maintaining costs; by virtue of the open type arrangement, the sand is easily discharged; the unit is especially suitable for upgrading and improvement of the built wide-top weirs or practical weir flood spillway.

The invention discloses a data transmission method and an infrared remote controller, which belong to the field of wireless communication. The data transmission method comprises that: the infrared remote controller samples cursor moving data from a track point or an optical touch mouse integrated on the infrared remote controller with a period of 54 ms in real time, transmits a notice to a receiving end when a user starts to move a cursor, alternately combines the cursor moving data into a B cursor moving data frame and an A cursor moving data frame with the period of 108 ms and transmits thedata frames to the receiving end; when pressing a composite key down, the user combines key codes of the composite key into a key command frame and transmits the key command frame to the receiving end; when pressing a one-click key down, the user combines the key codes of the one-clock key into a single-key one-click frame and transmits the single-key one-click frame to the receiving end; and when pressing a double-click key down, the user combines the key codes of the double-click key into a single-key double-clock frame and transmits the single-key double-click frame to the receiving end. The data transmission method can enable the infrared remote controller to perform cursor input in an electrical appliance under the remote control of the infrared remote controller.

The invention relates to a combined key-type keyboard, electronic device and the character input method thereof. And the input method comprises the steps of: providing a combined key-type keyboard, which comprises several combined keys, each comprising a main key and at least an auxiliary key, where each main key and each auxiliary key separately stand for a character, and the main and auxiliary keys are adjacent and able to be pressed, separately or together; pressing a combined key; judging whether the auxiliary key of the combined key is pressed; if the auxiliary key is pressed, selecting the character the auxiliary key stands for; otherwise, selecting the character the main key stands for. And it meets the requirement for character input on a portable electronic device.

The invention relates to a compound key overflow weir type siphon well which comprises at least one single well combination. Each single well combination comprises a vertical well with a water inlet culvert pipe, the vertical wells are connected with overflow connecting wells, the overflow connecting wells are connected with water delivery culvert pipes, and compound key overflow weirs are arranged between the vertical wells and the overflow connecting wells; the compound key overflow weirs comprise weir bodies, positive triangular piers and reverse triangular piers which are provided with horizontal bottom surfaces are staggered on the tops of the weir bodies, the lengths of the bottom surfaces of the positive triangular piers and the reverse triangular piers along the direction of water flow are larger than the thicknesses of the tops of the weir bodies, and front weir cantilevers and rear weir cantilevers are formed. The compound key overflow weir type siphon well has the advantages that the compound key overflow weirs are used as flow passing facilities and bubble inhibiting schemes, accordingly, the single-width flow passing ability of the overflow weirs of the siphon well can be improved, the drop flow difference between the overflow weirs of the siphon well and open seas can be reduced, bubbles mixed in the water flow which flows through the weirs can be inhibited, and influence on ambient environments can be reduced; the engineering cost can be lowered, energy can be effectively dissipated, the bubbles can be effectively eliminated, and relatively clean water can be drained.

The present invention relates to a data transmission method and device and a data identification method and device. The data transmission method comprises: detecting states of compound keys; updating remote control data in a remote control module when detecting state changes of the compound keys; updating mouse data in a mouse module when detecting hold states of the compound keys and that the states are not stand-by states; transmitting the updated remote control data and mouse data. Accordingly, the data identification method comprises: receiving the remote control data / the mouse data transmitted by corresponding handheld devices through the data transmission method; identifying the remote control data / the mouse data transmitted by the handheld devices through corresponding protocols; responding to the identified remote control data / the mouse data and performing corresponding operations. The present invention can improve the validity of data transmission of the handheld devices.