baber/WOPTO huggingface dataset:
Patent KR-20010006708-A (KR)
Inventor: NISHINAGA SHO
IPC: H01L21/203
Filed: 2000-02-26
Abstract: PURPOSE: To provide a novel method for forming a thin layer of single crystal on an amorphous base layer by the micro-channel epitaxy technique based on the vapor growth method. CONSTITUTION: An amorphous thin layer 2 is formed on a single crystal substrate. Then, linear opening 3 is formed on the amorphous thin layer by etching to allow the surface of the single crystal substrate to be exposed. Under reduced pressure, molecular beams are injected to the surface of the single crystal substrate at an incident angle of =<40deg. to effect the epitaxy growth of a single crystal thin layer 8 on the surface of the single crystal substrate exposed at the opening 3. Then, the single crystal thin layer 8 is allowed to grow in the upright direction, subsequently the thin layer is allowed to grow in the horizontal direction on the amorphous thin layer 2 to form a transverse single crystal thin layer 9.
Patent KR-20010084528-A (KR)
Title: Method of and apparatus for sharing personal information in network
Inventor: LEE JONG MU
IPC: G06F17/00
Filed: 2000-02-26
Abstract: PURPOSE: A method and apparatus for offering personal information on a network is provided to prevent the leakage of credit information of a user by enabling the user to input personal information to an operator server at one time, and by enabling the user's computer to transmit the personal information to another web page from the operator server. CONSTITUTION: A personal user connects to an operator server. The personal user makes an application for admission to the operator server. In addition, the user inputs personal information and credit information. The operator server stores the personal information and the credit information of the user. In case that personal information is requested when the user wants to enter into a web page of another site through a web page of the operator server, the personal information stored in the operator server is transmitted to the web site.
Patent KR-20010088005-A (KR)
Title: Polarization insensitive semiconductor optical amplifier
Inventor: KIM JONG RYEOL
IPC: H01S5/0625
Filed: 2000-03-10
Abstract: PURPOSE: A polarization-insensitive(PI) semiconductor optical amplifier(SOA) is provided to control amplification regarding each mode and to approximately make the amplification regarding each mode coincide with each other, by controlling strain regarding respective regions of each mode to fall within a predetermined scope, and by applying current controlled through each electrode allotted to each region. CONSTITUTION: An optical amplifier has a crystal growth layer of a multilayered structure including an active layer(30) formed on a substrate(60). The active layer includes the first and second region having different polarization modes. An electrode unit(71,72) independently applies current to the respective regions of the active layer.
Patent KR-20010091091-A (KR)
Title: Channel decoding module apparatus of base station in the imt-2000 system
Inventor: CHOI GWI SANG
IPC: H04B7/155
Filed: 2000-03-13
Abstract: PURPOSE: A channel decoding module device for an IMT-2000 system is provided to increase decoding channel receiving capacity by simultaneously performing decoding functions to one high-speed channel and two low-speed channels such as voice and control channels. CONSTITUTION: A power supply unit(10) converts 5V power into 3.3V and 2.5V powers needed in a channel decoding module device, and provides the 3.3V and 2.5V powers. A clock generating unit(20) generates a clock needed for the operation of the channel decoding module device. An FPGA(30) performs a decoding function to two low-speed channels such as voice and control channels, generates a control signal for controlling the channel decoding module device and an address for reading/writing a DPRAM(Dual Port RAM), and performs an interface with a processor(80). A high-speed data processing unit(40) performs one high-speed channel such as video and data channels. First to third DPRAM(51-53) receive and transmit data decoded in the FPGA(30) and the high-speed data processing unit(40) and decoding data in the FPGA(30) and the high-speed data processing unit(40), and store the data. A buffer(60) performs the buffering of the decoded data or the decoding data when communicating with a processor(80).
Patent KR-20010091445-A (KR)
Title: Smart panels for noise reduction in wide band frequencies
Inventor: KIM JAE HWAN
IPC: H04R1/00
Filed: 2000-03-15
Abstract: PURPOSE: A smart panel for decreasing broadband noises is provided to maximize soundproof effects by decreasing insertion loss in the resonance frequency of a plate structure. CONSTITUTION: A smart panel for decreasing broadband noises comprises: a plate structure(1) supporting a sound-absorbing material(2) and decreasing noise in an audio frequency band; a sound-absorbing material attached to one side of the plate structure to reduce noise in an audible frequency band; and a piezoelectric unit composed of many piezoelectric materials(3) attached to the other side of the plate structure and a shunt circuit(4) connected to each piezoelectric material electrically to heighten soundproof effects in the resonance frequency of the plate structure.
Patent KR-20010104430-A (KR)
Inventor: HAN GEUM TAE
Filed: 2000-04-27
Abstract: 본 발명은 용접작업을 안정적이고 효과적으로 행할 수 있도록 용접노즐을 조절하거나 청소할 수 있는 실린더블록 재생용 자동 용접 시스템을 제공한다. 자동용접 시스템에 부가되는 용접노즐 조절장치는 용접건의 용접노즐에 형성될 수 있는 스패터(spatter)를 제거하기 위한 브러쉬와, 상기 용접노즐에 스패터(spatter)가 형성되는 것을 방지하기 위해 상기 용접노즐에 스패터 방지액을 도포하기 위한 스패터 방지액 도포기와, 와이어를 조절하기 위한 절단기와, 상기 용접 노즐의 원점을 잡기위한 원점 검사기와, 상기 용접노즐의 위치 및 이동을 감지하기 위한 복수개의 근접센서를 포함할 수 있다.
Patent KR-20010097887-A (KR)
Title: 자동수문
Inventor: HAN SANG KWAN
IPC: E02B7/20
Filed: 2000-04-26
Abstract: 본 발명은 하천이나 비교적 소형 저수지의 여수로(余水路) 또는 관계용수로에 설치하여 저수측(貯水側)의 수위를 항상 일정 범위 내로 유지하기 위한 자동수문에 관한 것으로서, 수위감지센서의 수위감지에 따라 실린더에 의해 자동으로 개폐작동이 이루어지면서도 개방시 저수측의 하부에 저장된 물의 배수가 원활하게 이루어지고, 또 수문본체와 근접한 저수측 바닥에 토사나 자갈이 쌓이더라도 개폐작동이 원활하게 이루어지며, 배수를 신속하게 할 수 있음과 함께 특히 홍수시에 돌이나 나무 등이 수문본체에 층돌하여 수문본체가 파손되는 현상을 방지할 수 있는자동수문을 제공하는 것을 과제로 한다. 
     본 발명의 자동수문은, 수로의 폭방향 양측에 소정의 간격을 두고 축조된 벽체(1,1)와, 각 벽체(1)의 상부에 직립되게 고정된 지지대(2)와, 양 지지대(2)에 길이방향의 양 선단부가 고정된 수평지지대(3)와, 중공의 사각 판 형상으로 되어 있음과 함께 상단부에는 회동축(4a)이 구비되어 수로바닥과 경사상태를 이루도록 상기 벽체(1) 사이에 배치됨과 함께 상기 회동축(4a)의 길이방향 양 선단부가 각 벽체(1)에 회동 가능하게 결합되어 있는 수문본체(4)와, 수문본체(4)를 회동축(4a)을중심으로 승강 조작하기 위하여 길이방향의 일단부는 수문본체(4)의 상면에 회동가능하게 결합되고 타단부는 상기 수평지지대(3)에 회동 가능하게 결합되어 있는 실린더(5)와, 저수측의 수위를 감지하기 위한 수위감지센서(6)로 되어, 수위감지센서의 수위 감지에 따라 실린더가 신장 또는 축소되는 것에 의해 수문본체가 회동축을중심으로 회동하여 자동 개폐되도록 된 것을 특징으로 한다. 
     본 발명의 자동수문은 수위감지센서의 수위감지에 의해 개폐작동이 자동으로 이루어지는 것임은 물론, 개방상태일 때 수문본체의 저수측 면과 수로 바닥 사이에 형성되는 배수공간을 통하여 저수측 하부의 물이 원활하게 배수되는 것이므로 적조현상 및 녹조현상을 방지할 수 있다. 또 개방 작동시 수문본체의 하부가 배수측의 상부로 회동하는 것이므로 수문본체와 근접한 저수측 수로의 바닥에 토사나 자갈이 쌓여 있는 상태라 하더라도 개방 작동이 원활하게 이루어 진다. 또한 수문본체의 하부로 배수가 이루어지는 것이므로 배수 단면적을 극대화하여 신속한 배수를 도모할 수 있고 특히 배수시 수문본체에 돌이나 나무 등이 충돌하여 수문본체가 파손될 우려가 없다.
Patent KR-20010100664-A (KR)
Inventor: JUNG KWAN YOUNG
Filed: 2000-05-04
Abstract: 본 발명은 학생용 또는 사무용 의자의 등받이에 관한 것이다. 
     본 발명 분리형 의자 등받이의 신축 연결구조는, 착석자의 둔부를 지지하는 좌판부(2)의 중앙 후단부로부터 상향 절곡된 수직지지대(3)의 상단부에 고정 결합되는 가로 고정대(3a)의 양측 단부상에 일정한 각도범위내에서 유동 가능하도록 결합되는 분리형 의자 등받이(4a)(4b)에 있어서, 양 등받이(14a)(14b) 사이의 공간에  " Ｗ " 형태의 신축 연결구(15)가 개재되어 단단한 고정된 구성으로서, 이때 상기 신축 연결구(15)의 전방 돌조(15a) 외측 단부에는 다수개의 접촉 지지돌기(16)가 상향 돌출됨에 기술적 특징이 있다. 
     본 발명 분리형 의자 등받이의 신축 연결구조는, 좌우측 등받이에 의해 착석자의 양편 등부위가 지지되는 가운데 중앙의 신출 연결구상에 돌출 형성된 접촉 지지돌기가 착석자의 둔부에서 후두부에 이르는 척추 부위를 지지하므로써 착석자의 등 전체가 안락하게 지지되도록 함과 아울러 전면을 향해 상향 돌출 형성된 접촉 지지돌기가 착석자의 척추부위를 소정의 압력으로 압박하게 되므로써 지압의 효과를 나타낼 수 있는 이점이 있으며, 장시간 앉아 있어도 직립해 있는 것과 같은 자세를 유지시켜 주기 때문에 착석자로 하여금 골반에서 겨등랑이 하부의 등에까지 편안함을 느끼게 하고 척추의 지압 효과로 인하여 육체적 스트레스를 해소해 주는 효과가 있다.
Patent KR-20010014879-A (KR)
Inventor: RICHARD ALLEN KELLY
IPC: G06F13/16
Filed: 2000-05-08
Abstract: PURPOSE: A bus efficiency and total system performance are improved by providing a means which switches and sets a division transaction mode to an overcommit mode when an inter-PCI-X bridge is not overcommitted. CONSTITUTION: A system (24) provides a toggle for switching the division transaction mode of the bridge (34) between peripheral components interconnect-Xs (PCI-X) between an 'overcomit inhibition' mode and 'overcomit' mode or 'flood' mode when the bridge (34) is not overcommitted. Then the system (24) toggles and switches the division transaction mode of the PCI-X bridge buffer, and then retrial and disconnection are generally minimized by the inter-PCI-X bridge (34) to improve the bus efficiency and total system performance.
Patent KR-20010112824-A (KR)
Inventor: HAN SUNG DONG
IPC: G06F17/00
Filed: 2000-06-16
Abstract: 본 발명은 다수의 신용카드,현금카드,고객카드들의 사용을 간단하게 보관함과 카드의 정보를 하나의 통일된 카드에 수납하여 보관할수 있는 기능과 신용카드발급및 인증기관에서 본 고안의 제품으로 개인정보를 입력할수 있는 포트를 포함하고 또한 카드의 휴대상의 편의를 도모함은 물론 악의의 사용자에의한 도난및 부주의한 분실로 인하여 습득한사람이 불법사용및 정보유출을 방지할수 있는기능으로서 암호코드를 포함하며 카드를 강제로 투출시키려 시도할때는 그와 동시에 수납된 카드의 자기띠의 기록된 정보를 삭제함으로써 수납된 카드를 무효화 시켜 불법사용을 막아주는 정보 삭제기능이 내장된 신용카드및 고객카드등을 수납휴대할수 있는 전자 카드 지갑이다.
Patent KR-20020002648-A (KR)
Title: One-cable low noise blockdown converter with improved function of separation between horizontal and vertical polarization isolation
Inventor: KIM WON HO
IPC: H03D7/18
Filed: 2000-06-30
Abstract: PURPOSE: An improved isolation characteristic of horizontally/vertically polarized waves in low noise block-down converter is provided to improve an isolation characteristic by excluding an interference between horizontally/vertically polarized waves. CONSTITUTION: A low noise amplification portion(11) is used for amplifying a satellite broadcasting signal received from a satellite antenna. The first mixer(M1) is used for mixing the first oscillation frequency(F1) of the first oscillator(L01) with a horizontally polarized wave of the low noise amplification portion(11). A frequency converter(12) is used for mixing the second oscillation frequency(F2) of the second oscillator(L02) with a vertically polarized wave of the low noise amplification portion(11). The first intermediate frequency amplification portion(13-1) amplifies an intermediate frequency signal(IF1) of the first mixer(M1). The second intermediate frequency amplification portion(13-2) amplifies an intermediate frequency signal(IF2) of the second mixer(M2). A low pass filter(20) passes low frequency of an output signal of the first intermediate frequency amplification portion(13-1). A high pass filter(30) passes high frequency of an output signal of the second intermediate frequency amplification portion(13-2). A band removal filter(40) removes a frequency difference between the first and the second oscillation frequencies(F1,F2).
Patent KR-20010049692-A (KR)
Inventor: ALISON-LINDA MAY
IPC: B32B7/02
Filed: 2000-07-01
Abstract: PURPOSE: A method for manufacturing multilayer cholesteric film is provided to better control reflection wave, so performing a mass production and reducing costs. CONSTITUTION: In the processing, a cholestic film with one wavelength is coated first and is polymerizeed, and then is coated with a second cholestic film and polymerized. In the device, transfer of un-polymerized material between layers adjacent to each other during preparation of single layer is minimized for the multilayer cholesteric film obtainable by the process and further minimized for the process of preparing an optical element, e.g. a polarizing plate, a compensation device, an alignment layer, color filter or holography element, and for the usage of the multilayer cholesteric film in decoration and liquid crystal pigment so as to provide usage for the decoration and security.
Patent KR-20020005789-A (KR)
Title: Corr0sion inhibit and neutralization units of gas boiler
Inventor: KIM SEONG GEUN
IPC: F24H1/00
Filed: 2000-07-10
Abstract: PURPOSE: A corrosion prevention and neutralization device of metal structure for a condensing gas boiler is provided to reduce environmental pollution by preventing the metal structure of a condensing gas boiler from corroding due to acid elements of exhaust gas and by neutralizing the acid elements. CONSTITUTION: A corrosion prevention and neutralization device of metal structure for a condensing gas boiler consists of: a control unit(154) receiving input signals from an indoor thermostat operated by a user and detecting the actually changing working states of a boiler; a water supply valve(152) for feeding neutralization water; a reducing valve lowering high pressure into low pressure; a neutralizer feeder(151) for supplying a neutralizer between the reducing valve and the water supply valve; metal structure contacted with condensate; and a pipe(153) connected with the metal structure. A neutralizer distilled in water is fed to the metal structure contacted with acid condensate. Thereby, the metal structure is prevented from corroding. In addition, environmental pollution is reduced as the neutralized water is drained through a drain port.
Patent KR-20020006733-A (KR)
Title: Wireless LCD Modem
Inventor: KIM MIN CHEOL
IPC: G09G3/36
Filed: 2000-07-13
Abstract: PURPOSE: A radio liquid crystal display device is provided to enable a liquid crystal display to be used as one display module individually or in connection with a main unit. CONSTITUTION: A main unit(201) transmits display data by an RF signal. A liquid crystal module(202) receives and decodes the RF display signal to display the decoded result. The main unit(201) codes data of a main control part(203) through an RF transceiver part(204) and converts the coded data into an RF signal. The main unit(201) transmits the RF signal through an antenna(205). The liquid crystal module(202) receives the RF display signal through an antenna(206), and the received RF display signal is decoded through the RF receiver part(207). The decoded signal is displayed on an LCD(209) through an LCD driver part(208).
Patent KR-20020009722-A (KR)
Title: A open and close door for outlet of air conditioner
Inventor: JIN SUN DONG
IPC: F24F13/00
Filed: 2000-07-26
Abstract: PURPOSE: An opening and closing door of a discharge port for an air conditioner is provided to prevent horizontal louvers from being entangled by protruding a fitting end near other horizontal louvers, and to improve air conditioning efficiency without wrong operation by opening and closing the discharge port automatically with actuating a driving motor. CONSTITUTION: An opening and closing door of a discharge port(66) in an air conditioner is composed of plural horizontal louvers(80) arranged horizontally in the discharge port; a link(114) hinge-combined with the horizontal louvers to move horizontal louvers integrally; a driving motor(90) connected to the horizontal louver to open and close the discharge port in turning the horizontal louvers; and an entanglement preventive unit preventing louvers from being entangled. The contact face between louvers is inclined downward. The discharge port is opened with keeping horizontal louvers evenly, and closed with actuating the driving motor. Horizontal louvers are prevented from being entangled with inserting fitting ends to fitting grooves, and air conditioning is performed efficiently with opening and closing the discharge port automatically by actuating the driving motor.
Patent KR-20000063827-A (KR)
Inventor: CHI JAE HOWAN
Filed: 2000-08-05
Abstract: PURPOSE: A system for relaying a moving picture advertisement on a network and a method for servicing real time information via a window for the moving picture advertisement are provided to maximize the effect of the moving picture advertisement, by supplying a special moving picture advertisement for producing a certain value when clients exchange information with a server, and providing various overlapped information while the moving picture advertisement is reproduced. CONSTITUTION: A plurality of client computers(100) are connected to a web server(200) via a network. The web server(200) supplies various contents of web service. The network is connected to a relay server(300) for relaying the advertisement of a moving picture with large data. The relay server(300) includes an advertisement relaying server(310) for storing the moving picture and offering it, and an information relaying server(320) for providing real time information during the time for preparing the reception of the moving picture.
Patent KR-20000071888-A (KR)
Title: 파노라마 조망 장치
IPC: G02B27/14
Filed: 2000-08-10
Abstract: 압축 고해상도 전방향 또는 파노라마 뷰어는 공통의 가상 광학 중심을 갖는 몇대의 카메라들을 갖는다.  카메라들의 각각의 조망 시야는 전체적으로 보았을 때 지역의 연속적인 360도 조망을 형성하기 위하여 배열된다.  카메라들은 그것들 각각이 피라미드와 같은 다면체의 다른 반사면을 조망하도록 위치된다.  이것은 각 카메라가 피라미드내에 위치한 가상의 광학 중심을 갖도록 한다.  카메라들은 그것들의 가상의 광학 중심들이 서로 상쇄되도록 위치된다.  상쇄들은 피라미드의 반사면들의 엣지들로부터 받은 이미지 왜곡들을 제거하는 좁은 수신 정지 지역들을 생성한다.  반사 피라미드들은 더 높은 압축율의 파노라마 뷰어를 생성하기 위하여 서로 포개지거나 베이스끼리 겹쳐 쌓인다.  아주 근접하여 두개 이상의 반사 피라미드들을 사용하는 것은 동일한 가상 광학 중심을 갖는 많은 카메라들을 사용하는 것을 허용한다.  많은 카메라들을 사용하는 것은 큰 조망 지역을 개개의 카메라가 각각의 작은 지역을 조망하는 많은 작은 지역으로 분할한다.  각각의 카메라가 작은 지역을 조망하기 때문에, 개선된 해상도가 사용자에게 제공된다.  파노라마들은 그들의 꼭지점을 통하는 기둥에 장착되고, 카메라들은 상기 꼭지점들의 연장되는 기둥의 일부에 고정된다.
Patent KR-20020015527-A (KR)
Title: Fixing structure of memory cover for notebook computer
Inventor: BANG GWANG SEOK
IPC: G06F1/16
Filed: 2000-08-22
Abstract: PURPOSE: A frame for attaching and detaching the memory cover of the portable device is provided for a user to detach simply the memory cover by applying a pop-up frame to the memory cover, and to improve the appearance of the portable device by removing a handle. CONSTITUTION: The one side of the memory cover(53) is hung and fixed to two holes(53a,53b) on a part of a case(51). The other side of the memory cover is fixed to the case by a screw(57). The pop-up frame, elastic material, is mounted on a contact surface between the memory cover and the case. In conclusion, when the screw is released, the memory cover automatically pops up by the elastic power of the pop-up frame and the user simply detaches the memory cover from the case.
Patent KR-20020017655-A (KR)
Title: A device for flatness dielectric in substrate
Inventor: HWANG SE MYEONG
IPC: H01L21/3105
Filed: 2000-08-31
Abstract: PURPOSE: An apparatus for planarizing an insulation layer of a multilayered substrate is provided to omit an additional process by minimizing the roughness of the substrate, and to improve reliability by minimizing an open or short circuit caused by the roughness. CONSTITUTION: An insulation layer(120) is stacked on the upper and lower portions of a CCL(110) of the multilayered substrate where an inner layer circuit pattern(100) is built as one body. A press unit(150) presses the insulation layer of the multilayered substrate so that the insulation layer is planarized. A planar plate of a stainless material is built as one body by interposing a cushion sheet on a part of a press plate(160).
Patent KR-20000072405-A (KR)
Inventor: KIM JUNG WAN
IPC: A62B1/08
Filed: 2000-09-01
Abstract: PURPOSE: A manumotive elevator for emergency is provided to be used for an escape device upon emergency by manually regulating an elevator in a state of blocking power. CONSTITUTION: An elevator is stopped at the height that an occupant can get in and an entrance is closed upon a fire or emergency. A stopping latch is released from a latch gear by rotating a lever of an automatic descending device clockwise. The elevator free-drops by the mass of the occupant and elevator. With an elevator screw in a stop state, an elevator plate(8) descends and only a rotator(9) rotates along a spiral line. A friction force occurs between a female screw of the rotator and a male screw of an elevator screw so that the elevator slowly descends. A descending speed becomes gradually fast by acceleration of gravity. When the elevator reaches the ground, a lower face of the elevator plate touches a shock absorber. Then the shock absorber reduces the descending speed in a moment and absorbs a shock.
Patent KR-20020028617-A (KR)
Title: Internet payment management system and the payment method using the same
Inventor: GU KYO CHUNG
Filed: 2000-10-11
Abstract: PURPOSE: An internet payment proxy system and method is provided to enable a finance management site to take a permission and financial informations from a member, and to make a real time payment for charges demanded by companies or persons over the internet. CONSTITUTION: The method comprises steps of a user accessing a finance management site over the internet, and subscribing for the site by inputting an ID and a password including personal informations, the user accessing electronic commerce servers collaborating with the finance management site, and purchasing services or goods, the electronic commerce servers demanding a payment to the finance management server, the finance management site making a payment robot check if a balance in a bank account of the user is enough to pay for the payment demand, the finance management site demanding a fund transfer from the account of the user to that of the electronic commerce server if the balance is enough, and the finance management site transmitting the payment specifications to the user via an e-mail. The payment robot includes a controller with a microprocessor and signal wiring, a memory for storing program codes, and a LED display for selectively turning on LEDs according to the signals from the controller.
Patent KR-20020038145-A (KR)
Title: Link type rear glass hinge structure of mid gate of vehicle
Inventor: LEE JIN RYEOL
IPC: B60J5/12
Filed: 2000-11-16
Abstract: PURPOSE: Structure of a link type rear glass hinge of a midgate is provided to properly use a trunk room formed behind a vehicle even in a narrow roof interior space and to offer convenience by the link structure. CONSTITUTION: A midgate is divided into a glass(40) and a rear panel(42). A slit and a groove are formed on the upper side and upper planar face of the rear panel. A glass catch unit and a weather strip are formed at the combining portion of the rear panel and the slit. A roof hinge hook is fixed on a roof panel(34), and a link combining unit is formed on the roof hinge hook. A first link is combined to the link combining unit, and a second link is combined to the first link. A glass hinge hook is formed on the second link. When a folding link combined to the roof hinge hook is unfolded completely, the roof hinge hook moves along a bolt slit. The glass is fixed on a glass fixing unit formed on a roof panel(34). The rear panel is turned over to a trunk room by a hinge assembly(38).
Patent KR-20020038902-A (KR)
Title: The Method and Apparatus for Computation of Economic Load Dispatch in Multi-source Electrical System
Inventor: LEE SANG JOONG
IPC: H02J3/06
Filed: 2000-11-18
Abstract: PURPOSE: A computing method and apparatus for economic power supply is provided to easily supply economic power supply for a multi-power electric circuit, while calculating loss sensitivity of node at a time by using a phase angle reference node. CONSTITUTION: A computing method comprises a first step of selecting a phase angle reference node; a second step of calculating loss sensitivity of a power node and storing the result of calculation into a loss sensitivity memory(MEM-LS); a third step of reading the loss sensitivity stored in the loss sensitivity memory, calculating a penalty coefficient for power node and storing the result of calculation into a penalty coefficient memory(MEM-PF); and a fourth step of reading the penalty coefficient stored in the penalty coefficient memory, and calculating the economic power supply for the multi-power circuit network.