摘要:
Techniques for reducing distortion and improving linearity of amplifiers are described. In an exemplary design, an apparatus includes a driver amplifier, a variable matching circuit, and a power amplifier. The driver amplifier amplifies a first RF signal and provides a second RF signal. The variable matching circuit receives the second RF signal and provides a third RF signal. The power amplifier amplifies the third RF signal and provides a fourth RF signal. The variable matching circuit matches a fixed impedance at the output of the driver amplifier to a variable impedance at the input of the power amplifier in order to improve the linearity of the amplifiers. In an exemplary design, the power amplifier includes a first transistor (e.g., an NMOS transistor) of a first type, and the variable matching circuit includes a second transistor (e.g., a PMOS transistor) of a second type that is different from the first type.
摘要:
A vending machine capable of refilling used ink cartridges as well as dispensing filled ink cartridges is closed. The vending machine includes at least one cartridge receptacle for receiving an ink cartridge, a user interface, a display unit, a nozzle health check module, a printhead servicing module, an ink reservoir, an ink refilling unit, a compartment containing new ink cartridges, a compartment containing filled, second-hand ink cartridges, and a recycle compartment for receiving discarded ink cartridges. The user is presented by the display unit with the option of (a) refilling a used cartridge, (b) purchasing a filled cartridge, or (c) returning a used cartridge in exchange for a purchase rebate or a discount voucher. When the user selects the option of refilling, the vending machine executes a refilling subroutine which includes checking the nozzle health.
摘要:
A coaxial cable includes a core, an insulating layer, a shielding layer, a sheathing layer. The core includes an amount of carbon nanotubes having at least one conductive coating disposed about the carbon nanotubes. The carbon nanotubes are orderly arranged. The insulating layer is about the core. The shielding layer is about the insulating layer. The sheathing layer is about the shielding layer.
摘要:
Compositions and methods are provided to screen, identify, select, isolate, and/or regenerate targeted integration events using seed priming. Seed priming provides the identification of a seed having stably incorporated into its genome a site-specific recombinase mediated integration of a selectable marker at a target locus operably linked to a promoter active in the seed.
摘要:
The present invention provides methods, compositions and systems for silylation of substrates, including direct asymmetric silylation of a substrate to provide enantiomerically enriched silylated products.
摘要:
A method for regulating expression of a virulence gene of Agrobacterium is described. The method comprises the steps of stimulating cereal cells, such as sorghum, so as to produce an active, typically phenolic, compound and exposing the Agrobacterium to this compound. The compound induces expression of the virulence gene of the Agrobacterium, effecting T-DNA transfer from the Agrobacterium to the cereal cells, which are thereby transformed.
摘要:
A method for making a coaxial cable, the method comprises the steps of: providing a carbon nanotube structure; and forming at least one conductive coating on a plurality of carbon nanotubes of the carbon nanotube structure; a carbon nanotube wire-like structure from the carbon nanotubes with at least one conductive coating; at least one layer of insulating material on the carbon nanotube wire-like structure; at least one layer of shielding material on the at least one layer of insulating material; and one layer of sheathing material on the at least one layer of shielding material.
摘要:
Method and System for calculating competitiveness metric between objects are provided. The method comprises the steps of: obtaining a first object and a second object; selecting, from all the relation instances stored in a relation instance repository, associated relation instances related to the first and second objects; and calculating, based on the selected associated relation instances, an extensional competitiveness metric Sout between the first and second objects as the competitiveness metric between the first and second objects. In an embodiment, the frequency that the associated relation instances related to the first and second objects appear in all the information source documents can be used for characterizing the extensional competitiveness metric. Furthermore, the present invention also provides an integrated competitiveness metric calculation method and system for combining the intensional and extensional competitiveness analysis results.
摘要:
A novel double haploid maize line designated PHWVZ and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing double haploid maize line PHWVZ with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHWVZ through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the double haploid line PHWVZ or a trait conversion of PHWVZ with another maize line. Inbred maize lines derived from double haploid maize line PHWVZ, methods for producing other inbred maize lines derived from double haploid maize line PHWVZ and the inbred maize lines and their parts derived by the use of those method.
摘要:
Methods for plant transformation, for improving transformation efficiency, and for producing transgenic plants are provided. The methods comprise crossing a recipient plant from a genetic line of a plant species of interest with a donor plant selected from a transformation competent genetic line of the same plant species or of another closely related plant species to obtain a hybrid plant. Tissues obtained from the hybrid plant are transformation competent. These tissues can then be transformed with one or more nucleotide sequences of interest and selected for transgenic events having the nucleotide sequence of interest integrated within a chromosome derived from the recipient plant. Transformed cells can be selected and transgenic hybrid plants regenerated. The nucleotide sequence of interest can be introgressed into the genetic line from which the original recipient parent was derived, or into other genetic lines. Transformed plants and seeds are additionally provided.