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66results about How to "Valid query" patented technology

Digital globe antetype system

The invention relates to the technical field of digital earth, in particular to a digital earth prototype system comprising a data receiving and fast processing sub-system, a metadata service sub-system, a model base sub-system, a space information database sub-system, a mesh calculation sub-system, a map application service sub-system and a virtual reality sub-system. With the adoption of the invention, it is able to construct a data resource sharing platform, a knowledge sharing platform, a computation resource sharing platform and a coordinated operation platform of the digital earth prototype system. Besides, with the establishment of the prototype system, the invention resolves relevant key technologies for the construction of a technology service platform for the application of space data and forms a service system for the application of space information in earth technology.
Owner:REMOTE SENSING APPLIED INST CHINESE ACAD OF SCI

Building fire intelligent rescue system and method based on ubiquitous network

The invention discloses a building fire intelligent rescue system based on a ubiquitous network. The system comprises a fire monitoring network, a handheld terminal, a monitoring center computer and a fire fighting command terminal, wherein the fire monitoring network consists of a plurality of convergence sub-networks and is connected with the monitoring center computer through wireless convergence nodes of the convergence sub-networks and a 3rd generation (3G) network; each convergence sub-network is a wireless sensor network which is provided with a main-chain-type topology structure consisting of wireless sensor nodes, namely fire monitoring nodes; and the handheld terminal comprises a query handheld terminal and a rescue handheld terminal, reads the label data of radio frequency identification (RFID) data of neighboring fire monitoring nodes of the handheld terminal by an internal RFID card reader and an RFID reading link which are arranged in the hand-held terminal, and exchanges data with the monitoring center computer through the 3G network. The system has the advantages of convenience in arrangement and high real-time capability; and the system can effectively assist firetrapped personnel in escaping and fire rescue personnel in making a rescue scheme; and intelligent guide is provided for the fire trapped personnel and the fire rescue personnel under the emergency condition of fire, and lives and property can be effectively rescued.
Owner:BOHAI UNIV

Organization and management and using method and system for cloud manufacturing service

InactiveCN105635283AEffective organizational managementActive service registrationTransmissionResource utilizationManagement efficiency
The invention discloses an organization and management and using method and system for a cloud manufacturing service. According to the method, on the basis of the internet of things technology and the cloud computing technology, interaction among a service provider, a service requester, and a cloud manufacturing service platform is described by using correlated network technologies like an XML language or an HTTP protocol; and modeling is carried out on the service based on description of the network technologies and a resource tree is constructed, so that the management efficiency and the resource utilization rate are effectively improved. Therefore, high-efficiency sharing of the resources and capabilities is realized; repeated building of the same kind of manufacturing resources and capability can be avoided; and the manufacturing energy and cost can be effectively saved. In a cloud manufacturing service system, a server is set to be in a user request waiting state; when a user request is received, the user request is analyzed; and corresponding operations of service registration, querying, updating, subscription, and usage are executed based on specific fields in the request.
Owner:NANJING UNIV OF POSTS & TELECOMM

Method for selecting codebooks based on deep learning under large scale MIMO

The invention relates to a method for selecting codebooks based on deep learning under large scale MIMO(Multiple-Input Multiple-Output) and belongs to the technical field of wireless communication. The method comprises following steps: acquiring pilot frequency information of a test zone to establish a pilot frequency training sequence and further obtaining a pilot frequency training sample; performing neural network iteration learning to the pilot frequency sample to obtain a final network weight value; selecting optical code words from a complete codebook according to the signal channel output by the neural network after learning. performing signal channel information matching to an unknown zone and the test zone to obtain a wireless signal channel thereof, and further obtaining code words corresponding to the wireless signal channel. By means of the method, wireless signal model and codebook query can be effectively, accurately and quickly established to avoid signal channel estimation of unknown zones and greatly reduce the complexity of unknown zone signal channel codebook selection.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Data flow classification method and data flow classification server

The invention provides a data distribution method and a data distribution server. The method is applied to the server and terminals supporting a DHCP (dynamic host configuration protocol), and includes that the server creates MAC (media access control) identifier mapping tables which include one or more groups of MAC identifier values acquired by MAC address values and IP (internet protocol) address fields allocated to each group of MAC identifier values, wherein the MAC address values divided into one group belong to the same IP service type; the server parses received IP address requests sent by the terminals of every IP service type to obtain MAC identifier values of each terminal, traverses in the MAC identifier mapping tables according to the MAC identifier values so as to obtain IP address fields allocated to the terminals of each IP service type, allocates IP addresses to the corresponding terminals according to the IP address fields and further processes services of the corresponding IP service types. Network bandwidth utilization rate and network management are effectively improved.
Owner:JIANGSU ZHONGKE YILIAN COMM TECH CO LTD

Lazy learning-based self-adaptive robustness forecast control method of blast furnace molten iron quality

ActiveCN109001979ATroubleshoot online update issuesDoes not affect forecast accuracyAdaptive controlLearning basedAutomatic control
The invention provides a lazy learning-based self-adaptive robustness forecast control method of blast furnace molten iron quality, and relates to the technical field of automatic control of blast furnace melting. The lazy learning-based self-adaptive robustness forecast control method comprises the steps of determining controlled quality and control quantity; acquiring historical production input-output measurement data of a blast furnace to construct an initial database; constructing an inquiry regression vector, and determining abnormal data; inquiring a similar leaning subset from the database, selecting an optimal learning subset, and processing the abnormal data; building a forecast model by taking the optimal learning subset; calculating index reference track of the molten iron quality, constructing a forecast control performance index to obtain an optimal control vector; and sending the optimal control vector to a bottom-layer PLC system, adjusting an execution mechanism, acquiring a new group of blast furnace measurement data, pre-processing the data, and updating the database. According to the method provided by the invention, the influence of the input-output interference can be effectively suppressed, the influence of the abnormal data is overcome, the blast furnace molten iron quality is stabilized to a value near to an expected value, and stable running, good quality and high yield of the blast furnace are facilitated.
Owner:NORTHEASTERN UNIV

System for acute coronary syndrome case information collection

The invention relates to a system for acute coronary syndrome case information collection. The system comprises a data collection side, a server side, a control side, a user side, a doctor inquiry side and a data cloud platform. The system is in butt joint with data information of a hospital information system, a clinical data center, a data warehouse and the user side and can comprehensively collect related information of the acute coronary syndrome; the doctor inquiry side is provided with identity authentication equipment, the examination information of a patient can be obtained in real time, information sharing of departments is achieved, and the diagnosis efficiency is improved. Information of doctors is opened to users, and convenience is brought to the users for independently choosing doctors and hospitals for seeking medical advices.
Owner:PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI

Shared logistics box management system and method

The invention provides a shared logistics box management system and method and relates to the technical field of logistics so as to solve low efficiency and inconvenient management in the prior art and to realize comprehensive and effective management of logistics boxes. The system comprises a logistics box, a storage device, a logistics box photographing device, a server and a user terminal. The logistics box, the storage device and the logistics box photographing device, and the user terminal are connected with the server. The logistics box is provided with an identification code, a positioning device, and a self state monitoring device. The self state monitoring device is used to identify the state parameter information of the logistics box. The storage device comprises a logistics box identification device for identifying the identification code. The logistics box photographing device is used for photographing the logistics box to obtain photo information. The server is configured to receive the identification code, the position information, the state parameter information and the photo information of the logistics box, or send the above information to the user terminal. The user terminal is configured to get access to the server and / or to receive messages pushed by the server.
Owner:HANGZHOU NAJIE TECH CO LTD

Real estate agent management system

The invention relates to a real estate agent management system and relates to a computer management system. According to the system, a house renting and selling registering module, a house renting and selling inquiry module, a house renting and selling report form statistic module, a house renting and selling contract management module and a user management module are set under the Browser / Server mode, a common sense information table, an agent information table, a user information table, a company information table, a house renting and selling contract table and a real estate agent contract table are built, the JDBC bridge data driving program is adopted, and the Java language is adopted connect a database. The system enables management work to be standardized, systematized and sequenced, avoids randomness, and improves information processing speed and accuracy. Property source basic information can be inquired and modified timely, accurately and effectively, and proper property sources can be found accurately and quickly. A manager can know the house renting and selling conditions in the current month quickly.
Owner:SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY

Intelligent automobile security gateway system

The invention provides an intelligent automobile security gateway system. The system comprises a cloud module, a pipe end module and a vehicle end module. The cloud module is electrically connected with a network cloud and an intelligent vehicle and used for network communication transmission between the network cloud and the intelligent vehicle, and the cloud module comprises an OTA server, a security policy server and a comprehensive access cloud server. The pipe end module is electrically connected with the cloud module and the intelligent automobile and used for network communication between the cloud module and the intelligent automobile for safety protection. The vehicle end module is electrically connected with the pipe end module and the intelligent vehicle and used for achieving avehicle-mounted gateway on the intelligent vehicle. Through the design of the cloud module, the intelligent automobile security gateway system has a strong firewall function, through the design of the pipe end module, a security protection mechanism can be effectively carried out, and through the design of the automobile end module, function enhancement can be effectively carried out through dataprocessing so as to effectively carry out vehicle management and information data query.
Owner:英博超算(南京)科技有限公司

Intelligent conference control method and system

The invention discloses an intelligent conference control method and system. The method comprises acquisition of authorized user information, key generation, database establishment, conference room reservation request determination service, directional transmission of participant information, turn-on of conference auxiliary equipment, attendance service and conference end processing. The system comprises an authorized user data acquisition module, a key generation module, an employee data acquisition module, a conference room information acquisition module, a storage module, a conference roomreservation request determination service module, a conference determination information generation and transmission module, a conference room internal control module, a conference room access identification module, an attendance service module and a communication module. The method and the system can arrange conference proceedings accurately and efficiently, maximize the use of a conference room,reduce the labor intensity of manual registration schedules, conveniently and quickly handle the reservation and proceeding of various conferences, achieve automation and intelligence, realize the goal of unmanned management of the conference room, and have high practical value.
Owner:HEFEI ANLI ELECTRIC POWER ENG CO LTD

Application-place monitoring method, device and system

The invention provides application-place monitoring method, device and system. The method comprises the steps that a cloud server acquires an acquisition signal sent by a signal acquisition device, wherein all sensors and camera shooting devices in the signal acquisition device are respectively in wireless connection with the cloud server, and are respectively arranged at the designated positions of an application place; the cloud server determines scene information of the application place by acquired signals, wherein the scene information includes people-flow density, environmental conditions or abnormal events of the application place; and the scene information is pushed to a mobile terminal of a signed user. The application-place monitoring method, device and system provided by the invention have the advantages that the cloud server obtains the acquired signals, analyzes and processes the acquired signals, determines the scene information of the application place and pushes the scene information to the mobile terminal of the signed user, so that unified management, share and exchange of information are realized. The application-place monitoring method, device and system have practical reference significance and are conductive to improving the experience of the user.
Owner:成都加华科技股份有限公司

Cluster controller for etching devices

A cluster controller of etching machine consists of input unit for inputting data into controller, storage unit for storing data, output unit for displaying monitor state, CPU for executing control information, transmission unit being used to connect with etching machine and process module for outputting control information to etching machine according to condition required by process flow stored in said module.
Owner:BEIJING NAURA MICROELECTRONICS EQUIP CO LTD +1

Data subscription method, device, server and system

The invention provides a data subscription method, comprising the steps of: generating subscription information in response to a subscription activation instruction; performing security verification on the subscription information, generating a security log record through the security verification; reading the email template, and generating hypertext email information and the structured query language according to the subscription information, executing the structured query language, and returning the query result to a mail generating module; by the mail generating module, generating an emailattachment according to the query result, and sending the mail. The above data subscription method is capable of realizing different customization requirements of the user for data subscription, and ensuring that the subscription data is quickly and timely launched. Users may use different terminals to quickly and efficiently query multiple servers or distributed servers with high security and effective SQL injection prevention.
Owner:TENCENT TECH (SHENZHEN) CO LTD

Intelligent construction processing method and system for live conference

The present invention discloses an intelligent construction processing method and system for live conference, which comprises the steps of: Collecting information of authorized users, generating a secret key, building a database, determining reservation request of meeting room, directly sending meeting information, turning on conference equipment, serving of check on work attendance and end process of the conference. The system comprises an authorized users data collection module, a secret key generation module, an employee data collection module, a conference room information collection module, a storage module, a reservation request of meeting room determining module, a conference determination information generation transmission module, a conference room internal control module, a conference room entrance guard identity module, an check on work attendance service module and a communication module. The intelligent construction processing method and system for live conference can schedule meeting matters accurately and efficiently, maximize the use of conference rooms, reduce labor intensity of manual table registration, conveniently and rapidly processed reservation and progressof various conferences, achieves automation, intelligence and realize objective of unmanned management of the conference room, has high practical value.
Owner:HEFEI DONGHENGRUI ELECTRONICS TECH CO LTD

Biological key and biological lock

The invention relates to a biology key and its matching biology lock. The biology key is embedded with biology character information and which is transmitted to the biology lock wirelessly, the biology lock is embedded with biology character information correspondent to the information in biology key and receives the biology character information transmitted by the key, the two matches, the lock is opened, and otherwise, the lock can not be opened. The merits are: the first one is that only the authorized person can open the biology lock with biology key, the unauthorized people can not open it even that he has the biology key; the second is: each biology key is stored with a ID for signing the biology key and code and coding algorithm for coding the information. Even if the communication information between the key and the lock is intercepted, it is no easy to be decoded; the third is: a set of lock may has several biology keys for several people to use, each authorized person may uses himself biology character to open the lock.
Owner:ZHEJIANG HUALI COMM TECH

An efficient and safe conference room reservation management method and system

The invention discloses an efficient and safe conference room reservation management method and system. The method includes collecting authorized user information, secret key generation, database establishment, conference room reservation request confirmation service, meeting information directional transmission, meeting auxiliary equipment opening, attendance service and meeting end processing. The system includes an authorized user data acquisition module, a secret key generation module, an employee data acquisition module, a meeting room information acquisition module, a storage module, a meeting room reservation request determination service module, a meeting determination information generation transmission module, a meeting room internal management and control module, a meeting roomaccess control identification module, an attendance service module and a communication module. The invention can precisely and efficiently arrange meeting matters, maximizes the utilization of the conference room, reduces the labor intensity of manual registration and scheduling, conveniently and quickly processes the reservation and carrying out of various meetings, achieves automation and intelligence, realizes the goal of unmanned management of the conference room, and has high practical value.
Owner:HEFEI KANGZHIHENG MACHINERY TECH CO LTD

Lost article retrieving method and system based on taxi multisource data

The invention provides a lost article retrieving method and system based on taxi multisource data. Comparison analysis is carried out on multisource data and article lost information reported by riding users, thereby querying vehicle license plates to finish retrieving lost articles. According to the method and the system, on the basis of positioning data uploaded by taxi vehicular equipment in real time and get-on and get-off clock-in information of the vehicular terminals, taxi operation record information is determined, and a taxi operation database is established; and automatic comparisonanalysis is carried out on the taxi vehicle operation record information in the taxi operation database according to the article lost information uploaded by the riding users, and the vehicle licenseplates of the taxies ridden by the riding users are determined. According to the method and the system, operation records of the taxies in a road network are gathered based on the vehicular equipmentof the taxies; the vehicle license plates of the taxies in which the articles are lost are effectively queried based on a data mining and analysis technology; a traffic police department does not needto intervene and call videos for query; the vehicle equipment does not need to be mounted additionally; and the method and the system are convenient for operation and are easy to realize.
Owner:JIANGSU ZHITONG TRANSPORTATION TECH

Conference room reservation method and system

The invention discloses a conference room reservation method and system. The method comprises the following steps of: acquiring authorized user information; generating a secret key; establishing a database; determining a conference room reservation request; directionally sending conference attending information; starting conference auxiliary equipment; carrying out an attendance check service; andcarrying out conference ending processing. The system comprises an authorized user data acquisition module, a secret key generation module, a staff data acquisition module, a conference room information acquisition module, a storage module, a conference room reservation request determination service module, a conference determination information generation and transmission module, a conference room interior control module, a conference room entrance guard recognition module, an attendance checking service module and a communication module. The method and system are capable of accurately and efficiently arranging conference proceedings so as to maximally utilize conference rooms and decrease the labor intensity of manual login and table arrangement, and conveniently and rapidly processingreservation and proceeding of various conferences so as to achieve automation and intelligence and realize the aim of unmanned conference room management, and has a relatively high practical value.
Owner:HEFEI XINYADA INTELLIGENT TECH CO LTD

Conference rapid establishing and efficient implementation method and system

The present invention discloses a conference rapid establishing and efficient implementation method and system. The method comprises the steps of: collection of authorization user information, generation of secret keys, establishing of a database, conference room reservation request determination service, conference attending orienteering sending, conference auxiliary device turning-on, attendanceservice and conference ending processing. The system comprises an authorization user data collection module, a secret key generation module, a staff data collection module, a conference room information collection module, a storage module, a conference room reservation request determination service module, a conference determination information generation and transmission module, a conference room internal control module, a conference room gate control identification module, an attendance service module and a communication module. The conference rapid establishing and efficient implementationmethod and system can accurately and effectively arrange an agenda, can maximally utilize the conference room, can reduce the labour intensity of manual registration and list arrangement, can conveniently and rapidly handle with reservation and proceeding of various conferences, is automatic and intelligent, can achieve the target of unmanned management of the conference, and has a high practicalvalue.
Owner:HEFEI SIBOT SOFTWARE DEV CO LTD

Number taking method, number taking machine and number taking system for person and certificate verification

The invention discloses a number taking method, a number taking machine and a number taking system for person and certificate verification. The number taking method comprises the following step that acamera and a second-generation identity card reader scan and collect a human face head portrait and a second-generation identity card head portrait in real time, feature values are extracted throughthe collected human face head portrait and the second-generation identity card head portrait, intelligent comparison is conducted through the feature values of the human face head portrait and the second-generation identity card head portrait, verification is completed, and transacted items or services can be selected and numbered only after verification is passed. According to the invention, thehidden trouble of illegally using other identities to handle business is avoided, meanwhile, the number of empty numbers generated by the system is reduced, the public security organization can be assisted in tracking escaped persons and missing persons, relevant information and records of business handling of people can be effectively inquired, follow-up research and return visit of follow-up government departments are facilitated, and the number taking terminal can customize relevant functions and set a number taking interface by itself.
Owner:广州南翼信息科技有限公司

Insurance knowledge graph generation method, device, equipment and storage medium

The embodiment of the invention provides an insurance knowledge graph generation method, a device, equipment and a storage medium. The method comprises the steps of collecting multiple pieces of insurance information; determining a plurality of combination relationships among the plurality of sub-insurance categories according to the plurality of sub-insurance categories and the sub-insurance attribute corresponding to each sub-insurance category; taking the insurance category as a node entity, and taking the plurality of sub-insurance categories as sub-nodes of the node entity; generating aninsurance knowledge graph according to the node entity and each child node; and displaying the thumbnail, so that a user clicks the thumbnail according to the sub-insurance type description information to query insurance premium information of the sub-insurance type corresponding to the sub-node and the various combination relationships between the sub-insurance type and other sub-insurance typesassociated with the sub-insurance type. According to the method provided by the embodiment of the invention, the insurance business knowledge can be intuitively and effectively queried.
Owner:TAIKANG LIFE INSURANCE CO LTD +1

A method and system for unmanned service in a conference room

InactiveCN109087059AMaximize utilizationRealize the goal of unmanned managementOffice automationKey generationData acquisition module
The invention discloses a method and a system for unmanned service in a conference room. The method comprises the following steps: collecting authorized user information, generating secret keys, establishing a database, confirming service of a reservation request of the conference room, directional transmission of attendance information, opening auxiliary equipment of the conference, attendance service and end-of-meeting processing. The system includes an authorized user data acquisition module, a secret key generation module, an employee data acquisition module, a meeting room information acquisition module, a storage module, a meeting room reservation request determination service module, a meeting determination information generation transmission module, a meeting room internal management and control module, a meeting room access control identification module, an attendance service module and a communication module. The invention can precisely and efficiently arrange meeting matters, maximizes the utilization of the conference room, reduces the labor intensity of manual registration and scheduling, conveniently and quickly processes the reservation and carrying out of various meetings, achieves automation and intelligence, realizes the goal of unmanned management of the conference room, and has high practical value.
Owner:HEBEI JIASHICHENG ENERGY TECH CO LTD

Automatic packaging method and system based on machine vision

The invention belongs to the technical field of packaging, and discloses an automatic packaging method and system based on machine vision, and the method comprises the steps: sorting to-be-packaged objects, scanning the to-be-packaged objects, extracting scanning image feature elements, and recognizing the scanning image feature elements; detecting the weight of the to-be-packaged object, and determining the packaging space position of a packaging mechanical arm; obtaining packages, packaging, numbering, and pasting commodity information labels and / or express waybills; detecting the packaginginformation through packaging detection equipment; and storing, sending and displaying the information. The packaging information detection efficiency can be improved through a packaging information detection module; meanwhile, by means of a data storage module, package detection data are recorded through multiple dimensions, the multi-dimensional information is completely stored and associated ina database, and the purposes of effectively storing package detection results and saving storage space are achieved; and the stored package detection result data can be effectively queried.
Owner:HUBEI NORMAL UNIV

Cost progress refining system

InactiveCN106991562AValid queryAvoid Deadline DelaysOffice automationReport generationComputer science
The invention discloses a cost progress refining system. The cost progress refining system includes a project setting module, an execute solution editing module, an execute solution auditing module, a draft editing module, a first review module, a draft correction module, a final draft auditing module and a report generation module. The cost progress refining system respectively sets the related modules for control management for project menu making, editing, auditing and correction of the draft, auditing of final draft, and progress report generation, can timely know about the progress of the whole project, can effectively monitoring the progress of the project, and can improve the work efficiency and save the management cost.
Owner:华联世纪工程咨询股份有限公司

Intelligent charger based on visualization, data management and information interconnection

The invention provides an intelligent charger based on visualization, data management and information interconnection. The intelligent charger comprises a charging box provided with a charging module.The charging box is provided with a charging connecting line inserted in an electric vehicle. The charging box is further provided with a data acquisition module, a data management module and a wireless communication module. The data acquisition module acquires the battery electric quantity and real-time charging data of the electric vehicle through the charging connecting line. The data management module controls the charging module to charge the electric vehicle when judging that the battery electric quantity of the electric vehicle reaches a charging standard value, processes the real-timecharging data, generates charging record data, conducts real-time storage and synchronous display on the generated charging record data and gives a voice prompt when charging is finished or cannot beconducted. The wireless communication module sends the charging record data stored in real time to a user mobile terminal and a cloud server. The real-time charging data can be displayed and sent tothe user mobile terminal and the cloud server for user interconnection.
Owner:王维

Query method for XML (Extensive Makeup Language) data

The invention provides a query method for XML (Extensive Makeup Language) data. The query method comprises the following steps: (1) adopting a Native XML manner to store the XML data, wherein a storage structure comprises an inner node layer, a leaf node layer and an inverted layer, wherein the inner node layer is used for storing nodes of an XML tree, an XML element is encoded by adopting a DDE (Dynamic Data Exchange) encoding manner, the leaf node layer is used for storing file data of the nodes of the XML tree; the inverted layer is used for storing an inverted index of the leaf node layer; (2) taking out an element sequence corresponding to the nodes of an XPath from the inverted layer according to an input XPath query statement and carrying out merge sort by adopting a loser tree; and (3) carrying out pushing and popping operation on XML elements subjected to the merge sort according to the sequence and obtaining a query result from a buffering region. According to the query method for the XML data, the XPath with a keyword OR and a wildcard character * can be processed and the efficiency is very high.
Owner:PEKING UNIV

A method and a system for improving the use efficiency of a conference room

The invention discloses a method and a system for improving the use efficiency of a conference room. The method comprises the following steps: collection of authorized user information, secret key generation, database establishment, conference room reservation request confirmation service, directional transmission of attendance information, opening of conference auxiliary equipment, attendance service and end-of-meeting processing. The system includes an authorized user data acquisition module, a secret key generation module, an employee data acquisition module, a meeting room information acquisition module, a storage module, a meeting room reservation request determination service module, a meeting determination information generation transmission module, a meeting room internal management and control module, a meeting room access control identification module, an attendance service module and a communication module. The invention can precisely and efficiently arrange meeting matters,maximizes the utilization of the conference room, reduces the labor intensity of manual registration and scheduling, conveniently and quickly processes the reservation and carrying out of various meetings, achieves automation and intelligence, realizes the goal of unmanned management of the conference room, and has high practical value.
Owner:HEFEI DAHU ELECTRIC WIRE & CABLE TECH CO LTD
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