摘要:
The present invention relates to a high strength polyethylene-2,6-naphthalate fiber produced by a method comprising controlling the stress-strain curve and fine structure of an undrawn yarn such that the drawability of the undrawn yarn in a drawing step is improved. The industrial polyethylene-2,6-naphthalate fiber with high strength according to the present invention shows high strength and low shrinkage, and a treated cord formed from this fiber has improved dimensional stability and high strength, such that it can be advantageously employed as a fibrous reinforcement material of rubber products such as tires.
摘要:
Provided is an Ethernet packet transmission apparatus and method. The Ethernet packet transmission apparatus includes: a packet transceiving unit for transceiving an Ethernet packet through a plurality of Ethernet ports; a MAC header processing unit for receiving the Ethernet packet and reading header information; a packet processing unit for receiving the Ethernet packet, classifying the received Ethernet packet on a service or destination basis, assigning a priority label to the classified Ethernet packet on a packet-by-packet basis, and outputting memory state information on the corresponding port; a congestion controlling unit for controlling a position in an output sequence of the Ethernet packet; and a signal processing unit for receiving and comparing the port state information and the memory state information and outputting either a memory control signal or a congestion control signal to control the packet processing unit and the congestion controlling unit.
摘要:
The present invention relates to a composite electrolyte membrane for fuel cells that has high proton conductivity and low fuel permeability even under low humidity conditions and at elevated temperatures. The membrane, comprising a cation exchange resin and acid-treated dendrimers, has great utility in large and medium fuel cells for applications in household appliances, electric vehicles, etc.
摘要:
The present invention relates to silane adducts having a relatively higher adhesive strength as expressed formula X3SiR1, and manufacturing method thereof. wherein X is a hydrogenated form selected from one of epoxy compounds, amino compounds and bisphenolic, and R1 is selected from one of glycidyloxypropyl group, 2-(3,4-epoxycyclohexyl)ethyl group, 3-acryloxypropyl group, 3-methacryloxypropyl group, amino-propyl group, 3-[2-(2-aminoethylamino)ethylamino]propyl group, N-methylaminopropyl group, N-phenylaminopropyl group, N,N-dimethyl-3-aminopropyl group, mercapto-propyl group, cyano-propyl group, and isocyanato-propyl group.
摘要:
Disclosed herein is a linear compressor, which is designed in such a fashion that oil is suctioned into a space between a cylinder and a piston by a low pressure produced between the cylinder and the piston when the piston moves backward, and then is discharged to the outside by a high pressure produced between the cylinder and the piston when the piston moves forward, resulting in a simplified oil pumping structure and low cost.
摘要:
A magnetron cooling fin is disclosed, characterized in that a plurality of turbulence-promoting protrusions are provided on one side of a planar body that has a boss-type through-hole in which an anode is coupled and a plurality of coupling pieces outwardly extending and bent at edges of the planar body, whereby, with inflow air undergoing flow separation at top ends of the turbulence-promoting protrusions and coming again into contact with the planar body, an existing temperature boundary gets thinned and a friction coefficient gets increased, thereby improving a heat transfer rate and an cooling efficiency.
摘要:
The present invention provides a novel process for highly selective preparation of 2,6-dialkyltetralin, a key precursor for 2,6-dimethylnaphthalene (2,6-DMN), which does not require an extra step for purifying various isomers obtained from the conventional processes for 2,6-DMN. The present invention is advantageous to improve the synthetic yield, to simplify the operation and thus to reduce the production cost, since different starting materials and different pathways are exploited and thus the additional steps are not necessary.
摘要:
An air conditioner is disclosed. The present invention includes an input part to which a control signal for an operation of the air conditioner is inputted, a display part having at least one sub-display part displaying an operational state of the air conditioner, and a microcomputer controlling the air conditioner to be operated according to the control signal generated from the input part, the microcomputer controlling the operational state of the air conditioner to be displayed via the display part.
摘要:
A semiconductor memory device for performing a refresh operation comprises a memory cell array, a driving control unit, a word line driving unit, a sense amplifier driving unit and a sense amplifier. The memory cell array comprising a plurality of cells stores data. The driving control unit receives a row address and a plurality of command signals to output a word line control signal and a sense amplifier control signal, and sets an enable period of the sense amplifier control signal in response to a refresh signal. The word line driving unit receives the word line control signal to drive a word line. The sense amplifier driving unit receives the sense amplifier control signal to drive a sense amplifier. The sense amplifier senses and amplifies data of the bit line in response to an output signal from the sense amplifier driving unit. In the semiconductor memory device, sensing time is increased at a self-refresh mode, thereby reducing self-refresh current and improving refresh characteristics.
摘要:
A composite gasket for fuel cell stack comprises two rows of beads and a support which can improve mountability and sealing property and reduce the assembly pressure by using materials having low hardness with reduced volume. This invention also relates to a structure for the assembly of the composite gasket.