摘要:
A data transmission method and system are disclosed. The method comprises: a sending station sends a radio frame and notifies group transmission time interval information; a group station receives the radio frame and acquires group transmission time interval information of a group to which the group station belongs; and the group station competes for a sending opportunity within the group transmission time interval of the group to which the group station belongs. In accordance with the scheme provided in embodiments of the disclosure, a sending station allocates specific group transmission time intervals (subsections) to stations of different groups, and in the case of a large number of users stations, user stations in different groups compete for channels within different time intervals, thereby avoiding the simultaneous or approximately simultaneous competition among a large number of users, reducing the probability of collisions and improving the utilization efficiency of wireless resources.
摘要:
It is disclosed a method for transmitting wireless frame, including: the wireless frame is transmitted by using any access category. The wireless frame is a beginning frame for performing channel information measurement. It is further disclosed an apparatus for transmitting wireless frame, including: a selection unit and a transmitting unit, where the selection unit is configured to select any access category for a beginning frame for performing the channel information measurement; and the transmitting unit is configured to transmit the beginning frame. It is further disclosed a communication network element provided with the apparatus for transmitting wireless frame mentioned above. It is ensured that the wireless frames subsequent to the frame exchange sequence for performing the channel information measurement may be smoothly transmitted, and the channel information measurement may be smoothly performed, and thereby transmitting communication data based on the acquired channel information. The support of each communication network elements to the MIMO and beam forming is further ensured, and an effective supplement to the existing protocols is provided.
摘要:
It is disclosed a method for transmitting wireless frame, including: the wireless frame is transmitted by using any access category. The wireless frame is a beginning frame for performing channel information measurement. It is further disclosed an apparatus for transmitting wireless frame, including: a selection unit and a transmitting unit, where the selection unit is configured to select any access category for a beginning frame for performing the channel information measurement; and the transmitting unit is configured to transmit the beginning frame. It is further disclosed a communication network element provided with the apparatus for transmitting wireless frame mentioned above. It is ensured that the wireless frames subsequent to the frame exchange sequence for performing the channel information measurement may be smoothly transmitted, and the channel information measurement may be smoothly performed, and thereby transmitting communication data based on the acquired channel information. The support of each communication network elements to the MIMO and beam forming is further ensured, and an effective supplement to the existing protocols is provided.
摘要:
In the broadest sense an inventive conjugate includes a macrocyclic scaffold moiety incorporating at least one nitrogen atom. Through linkages to the ring, nitrogen atoms are bonded to at least one therapeutic species, or one cellular trafficking species, and preferably two or more types of trafficking species. The linkages between ring nitrogen atoms and agents are formed through N—C, N—S, N—O or N—N bonds. It is appreciated that more than one agent or agent species are coupled to a ring nitrogen atom through the inclusion of a branched carbon atom or secondary amine nitrogen within the intermediate between the agent and ring nitrogen atom. A disulfide bond intermediate between an agent and a linkage to the ring nitrogen is preferred in instances where intracellular release of the agent or trafficking species is desired. An optional metal ion is coordinated by the scaffolding moiety.
摘要:
The invention includes a method for separating polynucleotides, such as DNA, RNA and PNA, from a solution containing polynucleotides by reversibly and non-specifically binding the polynucleotides to a solid surface having a functional amide group-coated surface. The materials containing a solid surface can be in the form of microparticles, fibers, beads, membranes, test tubes, pipette tips or microwells and can further comprise a magnetic core portion. The pH, salt and concentration of crowding reagent, such as polyethylene glycol or alcohol, of the solution is adjusted to levels which result in nucleic acid binding to the solid surface. The magnetic microparticles with bound polynucleotides are separated from the solution under mild alkaline conditions and the nucleic acids are eluted from the magnetic microparticles. Solutions having different nucleic acid concentrations can be normalized by restricting the availability of the solid phase surface.
摘要:
Methods and compositions for inhibiting PDX-1 are provided according to the present invention. An anti-PDX-1 agent included in inventive methods and compositions includes an antibody, an aptamer, an antisense oligonucleotide, a ribozyme and/or an inhibitory compound. Methods of inhibiting PDX-1 expression in a tumor cell are provided by the present invention which include contacting a tumor cell with an effective amount of an anti-PDX-1 agent highly or completely complementary to a specified region of an RNA molecule encoding PDX-1. Such an agent specifically hybridizes with the RNA molecule encoding PDX-1 and inhibits the expression of a PDX-1 gene in the tumor cell. Compositions including anti-PDX-1 siRNA and/or shRNA are described. Recombinant expression constructs encoding anti-PDX-1 siRNA or shRNA according to the present invention are described.
摘要:
The invention includes a method for separating polynucleotides, such as DNA, RNA and PNA, from a solution containing polynucleotides by reversibly and non-specifically binding the polynucleotides to a solid surface having a functional amide group-coated surface. The materials containing a solid surface can be in the form of microparticles, fibers, beads, membranes, test tubes, pipette tips or microwells and can further comprise a magnetic core portion. The pH, salt and concentration of crowding reagent, such as polyethylene glycol or alcohol, of the solution is adjusted to levels which result in nucleic acid binding to the solid surface. The magnetic microparticles with bound polynucleotides are separated from the solution under mild alkaline conditions and the nucleic acids are eluted from the magnetic microparticles. Solutions having different nucleic acid concentrations can be normalized by restricting the availability of the solid phase surface.