baber/WOPTO huggingface dataset:
Patent KR-20210032756-A (KR)
Title: Composite rahmen bridge, construction method thereof and steel girder for composite rahmen bridge
Inventor: MOON JONG HOON
IPC: E01D2/02
Filed: 2019-09-17
Abstract: The present invention relates to a composite Rahman bridge, a construction method thereof and a steel girder for the composite Rahman bridge, wherein an end socket pipe coupled to an end part of a girder main body of a steel girder is positioned on a corner part and thus, together with a filling material therein, the end socket pipe can stably transmit a load. Accordingly, the details of the corner part is simple, and thus the corner part can be easily constructed and occurrence of defects in the corner part can be minimized. Moreover, economic efficiency can be increased by reducing the amount of steel. To this end, the composite Rahman bridge according to the present invention comprises: a pair of bridge columns installed to be separated from each other; a steel girder mounted on upper portions of the bridge columns; a corner part which enables upper ends of the bridge columns and an end part of the steel girder to be integrated with each other by concrete poured on site; and a bottom slab installed on an upper portion of the steel girder and integrally placed with the corner part. The steel girder comprises: a girder main body including upper and lower flanges and a web which connects the upper and lower flanges; and an end socket pipe coupled to an end part of the girder main body and coupled to the corner part on upper portions of the bridge columns, wherein top and bottom of the end socket pipe are opened and inside of the end socket pipe is filled with a filling material.
Patent KR-20200010143-A (KR)
Title: Pharmaceutical composition comprising luteolin-7-o-diglucuronide, apigenin-7-o-diglucuronid isolated from perilla frutescens var. acuta leaf extract for improving ocular fatigue
Inventor: CHOI CHUL YUNG
IPC: A61K9/48
Filed: 2019-09-19
Abstract: The present invention relates to a health functional food product showing effects in preventing and alleviating ocular fatigue, comprising luteolin-7-O-diglucuronide and apigenin-7-O-diglucuronide compounds contained in extracts of Perilla frutescens, wherein the effective components in a freeze-dried product and a spray-dried product of Perilla frutescens were found to equally contain luteolin-7-O-diglucuronide and apigenin-7-O-diglucuronide compounds. It was found that the effective components of the present invention, in squamous cell smooth muscle cells (rCSMCs) isolated from a rat′s eye, increase NO and cGMP contents involved in eye relaxation and reduce the contents of [Ca^(2+)]i ions. In addition, through an animal experiment, the effective components of the present invention increased the cGMP content. These compounds increase the cGMP content in rCSMCs isolated from a rat′s eye, and thus can be used as a functional health food composition beneficial to prevent and alleviate ocular fatigue.
Patent KR-20200140170-A (KR)
Title: Modular Elastic Roll
Inventor: LEE SANG GYU
IPC: B31B50/02
Filed: 2019-09-23
Abstract: Provided is a modular elastic roll including: a pair of hubs that are made in a semi-cylindrical shape and are symmetrically installed to facilitate maintenance and installation by replacing a roll without disassembling a central shaft and surround the outer surface of one side of the central shaft; a hollow cylindrical wheel that is made of a flexible material, is divided equally into a plurality of wheel pieces, and is detachably coupled to the outer surface of the hubs; and a pair of clamps that are respectively installed on the outer surfaces of both sides of the hubs to closely fix the hubs to the central shaft and prevent the wheel from moving in a longitudinal direction.
Patent KR-20200053399-A (KR)
Inventor: KIM EUN KYU
IPC: H01L21/306
Filed: 2019-09-25
Abstract: The present invention relates to a method for manufacturing a two-terminal thyristor memory device. According to an embodiment of the present invention, the method for manufacturing a thyristor memory device can comprise the steps of: forming a thyristor structure including a P+ type doped anode layer; coating a photoresist on the thyristor structure; forming an etching mask on the photoresist coated thyristor structure; and forming a two-terminal vertical thyristor memory device by etching the thyristor structure in which the etching mask is formed by using an potassium hydroxide (KOH) solution, wherein the thyristor structure can use a P+ type doped anode layer as an etching stop layer.
Patent KR-20210036468-A (KR)
Title: Electric wheelchair Safe driving system
Inventor: KIM DO HUN
IPC: A61G5/10
Filed: 2019-09-26
Abstract: The present invention relates to a safe driving system for an electric mobility assisting device, which enables a guardian to recognize even a position of a patient, comprising: an assisting device chair; a controller in a joystick shape; a driving motor mounted with wheels to be moved; a rear view mirror holder for allowing a smartphone to be mounted therein; a rear view mirror camera installed on a rear surface of an electric assisting device; and a rear view mirror application realized as a smartphone application.
Patent KR-20210047509-A (KR)
Inventor: CHO HYUNG JIN
IPC: A63B24/00
Filed: 2019-10-22
Abstract: Provided are a system and a method for providing feedback on workout. The system for providing feedback on workout comprises: a smart device having a pressure sensor and generating and transmitting pressure data based on the pressure generated by the exercise performed by the user; and a user terminal for generating and outputting feedback information with reference to the pressure data received from the smart device.
Patent KR-20210048138-A (KR)
Title: Method for Preparing Pills Comprising Ginseng
Inventor: JUNG MYUNG GYUN
IPC: A61K9/46
Filed: 2019-10-23
Abstract: The present invention provides a method for producing a pill containing ginseng comprising the following steps of: 1) preparing a liquid mixed raw material containing ginseng extracts and oligosaccharides; 2) preparing a powder-type mixed raw material containing a foaming agent and a cellulose-based binder; 3) mixing the liquid mixed raw material, the powder-type mixed raw material, and vegetable oil to form a granulated product; and 4) drying the granulated product. The pill containing ginseng prepared according to the present invention can improve a digestion-absorption rate in the body after ingestion by improving the disintegration rate.
Patent KR-20190124673-A (KR)
Inventor: SHIN SEUNG HARK
IPC: F04B27/10
Filed: 2019-10-25
Abstract: The present invention relates to a reciprocating type compressor. According to an embodiment of the present invention, the reciprocating type compressor enables a plurality of groove portions to be formed on an outer side of a suction hole or a discharge hole along the edge thereof, thereby reducing noise generated when opening and closing a suction lead or a discharge lead and improving performance.
Patent KR-20210051729-A (KR)
Title: Apparatus and method for converting query
Inventor: KIM SUN DEUK
IPC: G06F16/2452
Filed: 2019-10-31
Abstract: Disclosed are an apparatus and a method for converting a query. According to one embodiment of the present invention, the method for converting a query comprises: a step of receiving a query from a client device; a step of identifying a source structured query language (SQL) for the query based on the query; a step of converting the query into a query based on a reference SQL if the source SQL does not match one or more target SQLs; and a step of converting the converted query into one or more queries based on the one or more target SQLs.
Patent KR-20210052956-A (KR)
Title: Apparatus and Method for Forest Burn Severity Analysis Using Spectral Library and UAV Multispectral Image
Inventor: WOO CHOONG SHIK
IPC: G06T5/00
Filed: 2019-11-01
Abstract: A forest burn severity analysis apparatus according to an embodiment of the present invention may include: an input part for receiving at least one multispectral image of a forest burn area; a pre-processing part for pre-processing the at least one multispectral image; a mosaic reflectance image generating part for aggregating the pre-processed at least one multispectral image into one image and converting it into a mosaic reflectance image; and a forest burn severity detecting part for detecting forest burn severity by calculating a similarity between the spectral reflectance for each forest burn severity and the spectral reflectance for each pixel of the mosaic reflectance image based on the mosaic reflectance image. It is possible to automatically detect the forest burn severity from drone images.
Patent KR-20210054392-A (KR)
Inventor: CHA SOONHEUNG
IPC: G08B21/10
Filed: 2019-11-05
Abstract: The present invention relates to a sensor for detecting a disaster. According to an embodiment of the present invention, the sensor for detecting a disaster is configured to be easily installed in an industrial site or a dense facility, and generate an alarm signal and transmit disaster detection data to a remote location by detecting the disaster when the disaster such as fire or earthquake occurs. The sensor comprises a panel-shaped base, at least one casing part, and a sensor board part.
Patent KR-20210058459-A (KR)
Inventor: MOON KYUNG HYUK
IPC: H04L29/06
Filed: 2019-11-14
Abstract: The present invention relates to a multiple verification method and a system thereof. According to an embodiment of the present invention, the multiple verification method comprises: a first interface unit for receiving information of a first type based on a first internal network system and a non-network information transfer mechanism or for transferring the information of the first type to the first internal network system; and a control unit for converting first information of a first type received by the first interface unit into second information of a second type to generate a public key and a backup key based on the second information and converting them into third information of the first type. The first interface unit transmits the third information of the first type to the outside. Therefore, a system, separated from the outside, processes information to prevent falsification of information when the embodiment of the present invention is applied.
Patent KR-20210060102-A (KR)
Inventor: KIM SEI HYUN
IPC: A61K36/54
Filed: 2019-11-18
Abstract: The present invention discloses a manufacture method of a functional eye bandage and a functional eye bandage, wherein as chrysanthemums belonging to the family Chrysanthemum are mixed to produce medicinal herbs, but after fermenting chrysanthemums, dried chrysanthemums are dried and then mixed with chrysanthemums to produce medicinal materials, through efficacy obtained from the ingredients of chrysanthemum and dragon brain, it not only prevents eye diseases, but also relieves eye fatigue, and in addition, it is possible to prevent eye diseases in advance by stabilizing mind and body, strengthening immunity, and maintaining healthy eye blood vessels.
Patent KR-20210060761-A (KR)
Inventor: PARK KYOUNG TAE
IPC: C22B34/24
Filed: 2019-11-19
Abstract: The present invention relates to a smelting device for producing tantalum powder. More specifically, the present invention comprises: a chamber having a cover formed in an upper portion thereof; a reaction container installed inside the chamber; a thermocouple and a mixer disposed toward a lower side inside the reaction container and installed on the cover. The present invention further comprises: a supply nozzle disposed to be extended downward from the inside of the reaction container; and a distribution unit connected to the supply nozzle and installed in the upper portion of the cover to incrementally input a reducing agent.
Patent KR-20210062477-A (KR)
Inventor: TAI YONG MIN
IPC: G06T1/20
Filed: 2019-11-21
Abstract: An electronic device is disclosed. The electronic device includes: a memory for storing information on a plurality of first artificial intelligence models trained to perform different image processing, and information on a second artificial intelligence model trained to identify a type of image by predicting the processing result of the image by each of the plurality of first artificial intelligence models; and a processor connected to the memory to control the electronic device. The processor may input an input image into the second artificial intelligence model to identify the type of the input image, and input the input image to one of the plurality of first artificial intelligence models based on the identified type to process the input image. It is possible to improve the processing power of the input image.
Patent KR-20200067747-A (KR)
Title: Processing apparatus
Inventor: YANG YUNFENG
IPC: H01L21/67
Filed: 2019-11-22
Abstract: An objective of the present invention is to provide a machining apparatus capable of preventing damage to a workpiece during transport. The machining apparatus comprises: a chuck table to hold a plate-shaped workpiece; a machining unit to machine workpieces held by the chuck table; a cassette arranging part on which a cassette capable of accommodating a plurality of the workpieces is arranged; a temporary arranging part on which the workpieces discharged from the cassette or the workpieces inserted into the cassette are arranged; and a transport unit to transport the workpieces between the cassette and the temporary arranging part. The transport unit includes: a holding part to hold the outer circumference area of the workpiece from above and below; and a moving part to move the holding part between the cassette and the temporary arranging part. The holding part includes: a first contact part coming in contact with the upper surface side of the workpiece on a plurality of points or a line in a direction perpendicular to a moving direction of the moving part; and a second contact part coming in contact with the lower surface side of the workpiece on a plurality of points or a line in a direction perpendicular to the moving direction of the moving part.
Patent KR-20210063168-A (KR)
Title: Apparatus and method for supporting operator specific service in radio access network
Inventor: JUNHYUK SONG
IPC: H04W92/20
Filed: 2019-11-22
Abstract: The present disclosure relates to a 5^(th) generation (5G) or pre-5G communication system which is configured to support higher data rates after 4^(th) generation (4G) communication systems such as Long Term Evolution (LTE). The operation method of a device using interface between nodes constituting a radio access network intelligent controller (RIC) and a base station in the radio access network includes: generating first information related to the RIC service; generating second information indicating a type of message to be used to convey the first information; and transmitting the message including the first information and the second information.
Patent KR-20210065634-A (KR)
Title: Heat shield or insulation coating composition
Inventor: CHOI JANG SIK
IPC: C09D183/06
Filed: 2019-11-27
Abstract: The present invention relates a heat shield or insulation coating composition which contains, with respect to a total weight of the composition, 1 to 20 wt% of hollow ceramic, 1 to 20 wt% of glass bubbles, 1 to 10 wt% of an aluminum silicate fine hollow powder, 5 to 15 wt% of titanium dioxide, 1 to 10 wt% of zinc phosphate, 20 to 60 wt% of a binder resin, and the remaining amount of water, so that coating properties and adhesion are excellent, and a heat shielding and/or thermal insulation effect is excellent, thereby exhibiting excellent durability with only a single application as well as exhibiting excellent heat shielding and/or insulation effects.
Patent KR-20210067046-A (KR)
Title: Urinals for men's privacy protection and increased space utilization
Inventor: SEONG TAE SEON
IPC: E03C1/01
Filed: 2019-11-29
Abstract: The present invention relates to a urinal for a man. More specifically, the urinal for a man can block external view by a partition and allows a man to urinate toward a corner between the partition and a wall, thereby protecting privacy of the man. Space utilization inside a toilet can be improved through various arrangements.
Patent KR-20210070472-A (KR)
Title: Nonvolatile memory device
Inventor: SHIN DONGHA
IPC: H01L27/1157
Filed: 2019-12-04
Abstract: The present invention relates to a nonvolatile memory device capable of providing improved reliability. The nonvolatile memory device of the present invention includes: a memory cell area including a plurality of memory cells; and a peripheral circuit area on which the memory cell area is mounted, and in which the peripheral circuit area is configured to access the plurality of memory cells. The memory cell region includes a common source plate on a top of the peripheral circuit area, and a plurality of cell strings arranged on the common source plate and including a plurality of memory cells. The peripheral circuit area includes a buried region having a first upper portion covered by the memory cell area, a first exposed area having a second upper portion not covered by the memory cell region at a first side of the memory cell area, and a second exposed area having a third upper portion not covered by the memory cell area in a second side opposite the first side. The common source plate is biased through two or more first wires connected from the first exposed area to the common source plate and two or more second wires connected from the second exposed area to the common source plate.
Patent KR-20210075275-A (KR)
Title: Apparatus for protecting overcurrent of clutch control system
Inventor: JOON HYUN PARK
IPC: H02P29/024
Filed: 2019-12-12
Abstract: Disclosed is an apparatus for protecting an overcurrent of a clutch control system. The apparatus for protecting an overcurrent of a clutch control system according to one aspect of the present invention includes: a motor; an inverter including a plurality of switching elements to convert direct current power into alternating current power by turning on/off the switching elements to provide the converted alternating current power to the motor; a motor control unit for detecting a current supplied to the motor; and a microcomputer configured that an overcurrent threshold for overcurrent detection is set by each predetermined number of levels to diagnose whether the overcurrent of each level is present by comparing the detected current with the overcurrent threshold of each level, an overcurrent duration time is measured when the level is diagnosed as overcurrent, and the inverter is controlled based on the overcurrent duration time.
Patent KR-20210077313-A (KR)
Title: Lip tint compositions comprising lipophilic ampoule and method of the same
Inventor: JO JI WON
IPC: A61Q1/04
Filed: 2019-12-17
Abstract: The present invention relates to a lip tint composition that provides instant moisture to the lips and increases durability and a manufacturing method thereof, and more specifically, to a lip tint composition and a manufacturing method thereof comprising: (a) a hydrophilic primary mixture forming step of mixing 0.01 to 0.1 parts by weight of a chelate compound and 0.1 to 1 parts by weight of a dye, based on 45 to 60 parts by weight of purified water; (b) a secondary mixture forming step of adding and mixing 0.5 to 5 parts by weight of a hydroxyethyl acrylate and sodium acryloyldimethyltaurate copolymer to the hydrophilic primary mixture; (c) a mixture forming step of adding and stirring 0.01 to 0.5 parts by weight of a fragrance, based on 10 to 30 parts by weight of lipophilic functional oil; (d) a tertiary mixture forming step of putting and mixing the stirred material into the secondary mixture; and (e) a final product forming step of mixing 25 to 35 parts by weight of a moisturizing agent with the tertiary mixture.
Patent KR-20200084799-A (KR)
Inventor: SHEEM SANG KEUN
IPC: A23L7/196
Filed: 2019-12-28
Abstract: In allowing a user to put a food in an ice cream cone or similar container and eat the food, the present invention comprises a holder for holding the cone or similar container, and a tray attached under the holder so that the food spilled while eating is led into the tray.
Patent KR-20210086909-A (KR)
Title: Method for manufacturing glass using direct injection of soultion
Inventor: KIM JAE SUN
IPC: C03B37/014
Filed: 2019-12-31
Abstract: Provided is a method for manufacturing doped glass using a solution injection method. An outer circumference of a porous soot having a cylindrical shape is thermally treated and sintered. Further, while a solution is injected through one cross section of the porous soot, the solution is discharged through the other cross section thereof. During the process, an additive included in the solution is doped on the porous soot. According to the present invention, concentration at a center part is not very different from concentration at an outer circumference part.
Patent KR-20190022922-A (KR)
Title: 가변 페이지 크기 아키텍처
Inventor: VILLA CORRADO
IPC: G06F13/16
Filed: 2017-07-19
Abstract: 가변 페이지 크기를 가지는 메모리 어레이를 동작시키는 방법, 시스템, 및 디바이스가 기술된다. 페이지 크기는 동적으로 변경될 수 있으며, 메모리 어레이의 다수의 행은 필요한 페이지 크기를 생성하도록 병렬로 액세스될 수 있다. 어레이의 메모리 뱅크는 복수의 메모리 구획을 포함할 수 있으며, 각각의 메모리 구획은 메모리 셀을 판독하거나 또는 프로그래밍하도록 감지 구성 요소(예를 들어, 감지 증폭기)의 그 자체의 세트를 가질 수 있다. 그러므로, 복수의 메모리 구획은 메모리 셀의 다수의 행으로부터 메모리 페이지를 생성하도록 병렬로 액세스될 수 있다. 어드레싱 체계는 페이지 크기에 기초하여 수정될 수 있다. 논리 행 어드레스는 병렬로 액세스될 메모리 구획을 식별할 수 있다. 메모리 구획은 또한 링크될 수 있으며, 하나의 구획에서의 행에 액세스하는 것은 제2 메모리 구획에서의 행을 자동으로 액세스할 수 있다.
Patent KR-20190034599-A (KR)
Title: 밀봉 장치
Inventor: TOKUNAGA YUICHIRO
IPC: F02B53/00
Filed: 2017-07-19
Abstract: 오일의 전단 누설 및 훨링 운동을 행하는 부재의 회전에 수반하는 오일의 원심력에 의한 압력 누설의 양자(兩者)를, 오일 시일 부재의 슬라이딩면에 실시한 표면 텍스처에 의해 저감한다. 
로터리 엔진용 로터 등과 같이 훨링 운동을 행하는 부재(5)의 외측면에는 오일 시일 부재(15)가 설치되고, 오일 시일 부재(15)의 정지측 부재(3)와 상대 슬라이딩하는 부분의 슬라이딩면(15b)에는 둘레 방향으로 단차(15c)가 형성되고, 단차(15c)를 기준으로 하여 지름 방향의 한쪽 측에 상대적으로 높은 면이, 다른 한쪽 측에 상대적으로 낮은 면이 형성되고, 높은 면에는, 높은 면의 측으로부터 낮은 면의 측으로 누설되려고 하는 오일을 정지측 부재(3)와의 상대 슬라이딩에 의해 높은 면의 측으로 펌핑하는 펌핑 그루브(20)가 설치되는 것을 특징으로 하고 있다.
Patent KR-20190067159-A (KR)
Title: 모듈형 밸브 조립체
Inventor: RINGER YORAM
IPC: A62C35/68
Filed: 2017-03-10
Abstract: 습식 배관 시스템 모듈형 밸브 조립체는, 체크 밸브를 내부에 갖는 단일-부품 밸브 본체를 포함한다. 체크 밸브는, 체크 밸브를 가로지르는 압력차에 따라 폐쇄 위치와 개방 위치 간에 이동가능하다. 드레인 밸브는, 밸브 본체에 분리가능하게 장착되고, 체크 밸브의 하류에서 밸브 본체에 유체적으로 연결된다, 기계적으로 독립적인 흐름 검출 스위치는, 밸브 본체에 분리가능하게 장착되고, 드레인 밸브의 상류에서 밸브 본체에 유체적으로 연결된다.
Patent KR-20190031600-A (KR)
Title: 무선 통신 시스템에서 위상 잡음 추정을 위한 신호 송수신 방법 및 이를 지원하는 장치
Inventor: LEE KILBOM
IPC: H04L27/26
Filed: 2017-03-09
Abstract: 하향링크 신호에서 위상 잡음을 제거하기 위해 이용되는 PCRS를 생성하고, 하향링크 자원 영역에서 데이터 채널이 매핑되는 영역 상에 PCRS를 소정의 간격으로 매핑하고, PCRS를 단말로 전송하는 신호 전송 방법 및 기지국이 개시된다.
Patent KR-20190034345-A (KR)
Title: 무선 네트워크에서의 파일럿 재구성 및 재송신
Inventor: JIANG JING
IPC: H04L5/00
Filed: 2015-10-05
Abstract: 파일럿 심볼들에 할당된 리소스들이 채널 조건들에 보다 근접하게 매칭되도록 가변될 수 있는 적응적 파일럿 시그널링이 개시된다.     사용자 장비 (UE) 는 채널 조건에 따라 상이한 파일럿 구성을 요청할 수도 있다.     일 실시 형태에서, 방법은 제 1 송신 시간 간격 (TTI) 동안 제 1 수의 리소스 엘리먼트들을 사용하여 제 1 세트의 파일럿 심볼을 수신하는 단계, 및 제 2 TTI 동안 제 2 수의 리소스 엘리먼트들을 사용하여 제 2 세트의 파일럿 심볼들을 수신하는 단계를 포함한다.     실시형태에서, 제 1 TTI 및 제 2 TTI 는 동일한 수의 리소스 엘리먼트들을 포함하고, 제 1 수의 리소스 엘리먼트는 제 2 수의 리소스 엘리먼트들과 상이하다.
Patent KR-20190056393-A (KR)
Title: 정형외과적 뼈 고정구 겸 서스펜션 장치
Inventor: SCHULZ CHRISTOPH
IPC: A61B17/84
Filed: 2017-09-11
Abstract: 본 발명은, 자체의 상측 표면(12, 32) 상에, 팽창 장치를 수용하기 위한 중앙 보어(14)의 개구(13)를 구비하는, 헤드(11, 31) 및, 헤드(11, 31)의 저면(15, 35)에 인접하는, 뼈 내에 뼈 고정구 겸 서스펜션 장치를 고정하기 위한 팽창 맞춤못(expansion dowel)으로서 설계되는, 슬리브(16, 36)를 갖는, 정형외과적 뼈 고정구 겸 서스펜션 장치(10, 30)에 관한 것이다. 뼈 고정구 겸 서스펜션 장치는, 상기 헤드(11, 31)가, 슬리브(16, 36)를 지나 외향으로 돌출하는 칼라(18, 38)를 구비하고, 상기 칼라는 바람직하게, 봉합사의 부착을 위한 구멍들(19)을 구비하며 그리고, 자체의 외주면 상에, 이식물을 위한 적어도 하나의 리세스(20, 40)를 구비하는 것을 특징으로 한다.
Patent KR-20190077345-A (KR)
Title: 열 전도성 실리콘 조성물, 반도체 장치 및 반도체 장치의 제조 방법
Inventor: AKIBA SHOTA
IPC: C08K3/08
Filed: 2017-10-18
Abstract: 하기의 성분 (A), (B), (C) 및 (D)를 함유하는 열 전도성 실리콘 조성물. 
(A) 다음의 평균 조성식 (1) 
R 1   a SiO (4-a)/2  


(1) 
(식 (1) 중, R 1 은 수소 원자 또는 1가 탄화수소기를 나타내고, a는 1.8≤a≤2.2의 수이다)로 표시되는, 25℃에 있어서의 동점도가 10 내지 100,000㎟/s인 오르가노폴리실록산 
(B) 평균 입경이 3 내지 600㎚인 은나노 입자 
(C) 평균 입경이 0.7 내지 100㎛이고, 10W/m℃ 이상의 열 전도율을 갖고, 또한 성분 (B) 이외인 열 전도성 충전재 
(D) 백금계 촉매, 유기 과산화물 및 축합 반응용 촉매로 이루어지는 군에서 선택되는 촉매