摘要:
Disclosed is a method for preparing a porous carbon structure, the method comprising the steps of: (a) mixing a carbon precursor, a pyrolytic template, which is pyrolyzed at the carbonization temperature of the carbon precursor or removed by post-treatment after the carbonization of the carbon precursor so as to form pores, and a solvent, to prepare a spray solution; and (b) subjecting the spray solution either to spray pyrolysis or to spray drying and then spray pyrolysis, so as to form a carbonized carbon structure, and then removing the template from the carbon structure. A mesoporous spherical carbon prepared according to the disclosed method may have a large specific surface area and a large pore volume through the control of the kind and concentration of template, and thus can be used in a wide range of applications, including catalysts, adsorbents, electrode materials, materials for separation and purification, and materials for storing hydrogen and drugs.
摘要:
Antimicrobial articles, systems, and methods may be used for killing, inactivating, and/or inhibiting microorganisms. The antimicrobial articles and systems utilize up-conversion luminescence wherein a phosphor or luminescent material is capable of absorbing visible, infrared light, or longer wavelength radiation and emitting antimicrobial ultraviolet radiation via upconversion thus inhibiting the growth of, inhibiting the reproduction of or killing or otherwise inactivating microorganisms such as, but not limited to, spores, bacteria, fungi, mildew, mold, and algae. Embodiments of the antimicrobial article or system may comprise such a luminescent material and thus will have antimicrobial activity when exposed to natural or artificial light.
摘要:
A channel encoding apparatus and method are provided in which part of the parity bits are set to erroneous bits, and full parity bits are created by correcting the erroneous bits using a channel decoding apparatus of a receiver in a communication system. In the channel encoding apparatus, in order to generate a coded bit stream by adding a parity bit stream to a message bit stream, a partial parity generator generates a partial parity bit stream as a part of the parity bit stream using the message bit stream, an erasure generator generates a bit stream having an erroneous value as the remaining part of the parity bit stream, and a decoder calculates the value of the parity bit stream by correcting the bit stream having the erroneous value using a parity-check matrix that determines the parity bit stream, the message bit stream, and the partial parity bit stream.
摘要:
A method for puncturing a low density parity check (LDPC) code that is decoded through a parity check matrix expressed by a factor graph including check nodes and bit nodes connected to the check nodes through edges. The method includes classifying the bit nodes mapped to a parity part of a codeword into hierarchical groups according to their decoding facilities when the bit nodes are punctured, determining puncturing order of the groups, and sequentially performing puncturing on the bit nodes from a bit node belonging to a corresponding group according to the puncturing order of the groups to acquire a codeword with a desired coding rate.
摘要:
Provided is an electric product. The electric product includes a main body including at least one food storage unit, at least one camera disposed in the at least one food storage unit to photograph an incoming or outgoing food, and a control unit to determine whether the food is stocked or released on the basis of an image photographed by the at least one camera.
摘要:
In various embodiments, the present disclosure describes fullerene derivatives that are capable of photocatalytically generating reactive oxygen species in the presence of ultraviolet and/or visible light. In some embodiments, the fullerene derivatives are aminofullerenes containing a plurality of amine-terminated moieties covalently bonded to the fullerene cage. The fullerene derivatives may optionally be covalently bonded to a substrate surface for use in photocatalytic disinfection systems for removing various contaminants including, for example, bacteria, viruses, protozoa and chemical pollutants. Methods using the present fullerene and aminofullerene derivatives in various purification processes are also described herein.
摘要:
A flash memory preprocessing system comprises at least one flash memory device, a memory controller controlling program and read operations of the at least one flash memory device, and a flash preprocessor receiving program data from an external source, generating preprocessed data by converting the received program data, and outputting the preprocessed data to the memory controller. The memory controller controls the at least one flash memory device to perform a program operation on the at least one flash memory device according to the preprocessed data.
摘要:
A clothes treating apparatus having a liquid reservoir comprises a body having a drum therein, a liquid spraying means configured to spray liquid into the drum, a reservoir installation portion disposed at an inner upper portion of the body, a coupling means slidably installed in the reservoir installation portion, and a liquid reservoir detachably fixed into the coupling means and having an outlet on a side surface thereof, wherein a cut-out portion communicated with the reservoir installation portion and through which the liquid reservoir passes is formed on an upper surface of the body, and the liquid reservoir is connected to the liquid spraying means by sliding movement of the coupling means.
摘要:
Disclosed is a method for preparing a porous carbon structure, the method comprising the steps of: (a) mixing a carbon precursor, a pyrolytic template, which is pyrolyzed at the carbonization temperature of the carbon precursor or removed by post-treatment after the carbonization of the carbon precursor so as to form pores, and a solvent, to prepare a spray solution; and (b) subjecting the spray solution either to spray pyrolysis or to spray drying and then spray pyrolysis, so as to form a carbonized carbon structure, and then removing the template from the carbon structure. A mesoporous spherical carbon prepared according to the disclosed method may have a large specific surface area and a large pore volume through the control of the kind and concentration of template, and thus can be used in a wide range of applications, including catalysts, adsorbents, electrode materials, materials for separation and purification, and materials for storing hydrogen and drugs.
摘要:
Memory devices and multi-bit programming methods are provided. A memory device may include a plurality of memory units; a data separator that separates data into a plurality of groups; a selector that rotates each of the plurality of groups and transmits each of the groups to at least one of the plurality of memory units. The plurality of memory units may include page buffers that may program the transmitted group in a plurality of multi-bit cell arrays using a different order of a page programming operation. Through this, evenly reliable data pages may be generated.