摘要:
A coating composition for zinc- and zinc alloy-coated steel sheets includes: 1 to 30% by weight of hypophosphorous acid, 0.1 to 10% by weight of manganese, 0.01 to 5% by weight of a polyvinyl compound, zinc oxide and the balance of water, and further comprises 20% by weight or less of alcohol, when necessary, wherein the zinc oxide is included in such a content that, when 50 Ml (milliliters) of the coating composition is neutralized and titrated with 0.1N NaOH, the NaOH used for the neutralization titration is present in an amount of 10.0 Ml (milliliters) or less, and a content of free acid in the coating composition is adjusted to such an amount that, when 50 Ml (milliliters) of the coating composition is neutralized and titrated with 0.1N NaOH, the NaOH used for the neutralization titration is present in an amount of 10.0 Ml (milliliters) or less. The coating film formed on the steel sheet using the coating composition shows excellent properties such as lubricating property, adhesion and coating removal property, and also has a fine surface appearance.
摘要:
A technology for providing a service based on an electronic tag. A personalized service provider issues a new code that replaces a code recorded on an electronic tag which is attached to a product purchased by a purchaser, sets a privacy policy of the purchaser, authenticates the new code and purchaser information, and provides a service associated with the product in a limited manner according to the set privacy policy when a person who accesses the personalized service provider is not the purchaser of the product.
摘要:
A sensor node identification method by a first component of a first layer in a hierarchical sensor network includes: receiving a sensing request including sensor node identification information from a second component of a second layer prior to the first layer; modifying the sensor node identification information by removing an identifier of the first layer from the sensor node identification information when an identifier of the first layer matches an identifier of the first component among the sensor node identification information; and transmitting a sensing request including the modified sensor node identification information to a third component of a third layer subsequent to the first layer.
摘要:
Provided are an apparatus for resolving a code, an apparatus for providing code information, and methods used by the apparatuses, which can resolve various codes recorded in a storage medium, such as a radio frequency identification (RFID) tag, or which can obtain content corresponding to the codes. The apparatus for resolving a code comprises a reader which reads an object identifier and a code; a transceiver which transmits information about the object identifier and receives code information required for resolving the code, which is provided in response to the transmitted information; and a resolver which resolves the read code based on the received code information.
摘要:
A sensor node address management data structure and a method of managing a sensor network using an identifier of a sensor node can provide a single management system based on ID information used to identify the sensor node even though a sensor network management system does not provide a plurality of management systems based on an individual identification system for sensor networks and sensor nodes that are to be built in a variety of network environments. The sensor node address management data structure that is managed by a network management system for managing a sensor network includes: a first field including an identifier allocated to a sensor node; a second field indicating a network management type of the sensor node to make a connection to the sensor network; and a third field providing address information on the sensor node necessary for the connection to the sensor network.
摘要:
In a method of establishing a communication link in an ADSL system, a bit masking operation is performed on errors occurring in initialization messages of message tones and backup tones used to transmit/receive the initialization messages. Errors of one of the initialization messages of the message tones and the backup tones of which the errors are bit-masked are corrected. A cyclic redundancy check operation is performed on the initialization message having the corrected errors. Link establishment or link failure is determined based on the result of the cyclic redundancy check. Since some portion of errors of the initialization messages are removed in advance of a cyclic redundancy check operation, it is possible to stably perform a link establishment process.
摘要:
Disclosed is a method of manufacturing high quality lube base oil (Group III) from unconverted oil having various properties obtained in a variety of hydrocrackers using improved catalytic dewaxing and hydrofinishing, the method including producing unconverted oil of at least one kind in the same or different hydrocrackers; subjecting the unconverted oil to vacuum distillation; supplying all or part of the distillate fractions to a catalytic dewaxing reactor; supplying the dewaxed oil fraction to a hydrofinishing reactor; and stripping the hydrofinished light oil fraction, wherein make-up hydrogen is supplied upstream of the hydrofinishing reactor to increase hydrogen partial pressure, thereby enabling high quality base oil to be manufactured at high yield under optimal process conditions using unconverted oil produced by hydrocracking under various conditions.
摘要:
A chimney tray for a reactor, wherein a gas reactant and a liquid reactant are mixed in chimneys to improve the dispersion performance of the liquid reactant on the catalyst bed of a fixed bed reactor thereby increasing the contact efficiency between the liquid reactant and the catalyst depending on the uniformity of flow of the liquid reactant, resulting in increased reaction efficiency, and which includes a tray having a plurality of through-holes, and a plurality of chimneys perpendicularly inserted into the through-holes of the tray and having one or more outlets penetrating there through and facing each other, wherein each of the plurality of chimneys includes a conical lower end which is formed such that it extends from the lower surface of the tray to make an angle of 10˜40° with respect to the direction of the normal line of the tray.
摘要:
A coating composition for zinc- and zinc alloy-coated steel sheets includes: 1 to 30% by weight of hypophosphorous acid, 0.1 to 10% by weight of manganese, 0.01 to 5% by weight of a polyvinyl compound, zinc oxide and the balance of water, and further comprises 20% by weight or less of alcohol, when necessary, wherein the zinc oxide is included in such a content that, when 50 Ml (milliliters) of the coating composition is neutralized and titrated with 0.1N NaOH, the NaOH used for the neutralization titration is present in an amount of 10.0 Ml (milliliters) or less, and a content of free acid in the coating composition is adjusted to such an amount that, when 50 Ml (milliliters) of the coating composition is neutralized and titrated with 0.1N NaOH, the NaOH used for the neutralization titration is present in an amount of 10.0 Ml (milliliters) or less. The coating film formed on the steel sheet using the coating composition shows excellent properties such as lubricating property, adhesion and coating removal property, and also has a fine surface appearance.
摘要:
A method and apparatus for allowing transmission delay in a mobile Internet Protocol (IP) network is provided. The method of allowing transmission delay in a home agent of a mobile IP network, the method including: storing data in a mobile router when disconnection with the mobile router is sensed; and transmitting the stored data to the mobile router when reconnection with the mobile router is sensed.