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297results about How to "Achieve shielding" patented technology

SiC dual-groove metal-oxide-semiconductor field-effect transistor (MOSFET) device integrated with Schottky diode and fabrication method of SiC dual-groove MOSFET device

The invention discloses a SiC dual-groove metal-oxide-semiconductor field-effect transistor (MOSFET) device integrated with a Schottky diode. Two grooves are formed in an original cell structure of an active region in the SiC dual-groove MOSFET device and are respectively a gate groove and a source groove, the gate groove is formed in the center of the original cell structure, the source groove is formed in the periphery of the gate groove, doping with a conductive type opposite to that of a drift region is performed in the peripheries of the bottoms of the gate groove and the source groove, Schottky contact is arranged at a central region of the bottom of the source groove, and the Schottky diode electrically communicating with a source is formed, ohmic contact is formed between the periphery of the bottom of the source groove and a doping region with the conductive type opposite to that of the drift region, and the depths of the two grooves are larger than that of a p base region. With the adoption of a source and gate dual-groove structure, the doping with the conductive type opposite to that of the drift region is performed on the peripheries of the bottoms of the gate groove and the bottom of the source groove, thus, the shielding of an MOS gate is achieved, and the gate reliability is improved; and meanwhile, an electric field of the base region can be shielded, and the base region is prevented from being penetrated; and moreover, an MPS Schottky diode having high surge capability is integrated.
Owner:BEIJING CENTURY GOLDRAY SEMICON CO LTD

Contact unit and contact module comprising same, connector and connector module

The present invention provides a contact unit and a contact module comprising the same, a connector and a connector module. The contact module comprises a male connector and a female connector which respectively correspond to a male contact unit and a female contact unit, the male contact unit and the female contact unit respectively correspondingly comprise male and female end differential pairsand male and female end shielding pieces, the male end shielding piece is a groove-shaped shielding piece, the two sides of the groove-shaped shielding piece are respectively located at the two sidesof the male end differential pair, the extension direction of the groove-shaped shielding piece is the same as the extension direction of the corresponding differential pair, the male contact unit further comprises a grounding contact piece relatively fixedly arranged with the shielding piece, the grounding contact piece has a contact arm, and when the male contact unit and the female contact unitare plug-in, the two sides of the contact arm are respectively in contact with the side of the groove-shaped shielding piece of the male end and the female end shielding piece. Therefore, the male end shielding piece and the female end shielding piece form a shielding cavity configured to encircle the plug-in differential pairs so as to reduce the crosstalk.
Owner:CHINA AVIATION OPTICAL-ELECTRICAL TECH CO LTD

Visible light communication-based limited area authority authentication device and file security method

The invention relates to a restrictive region permission authentication device based on visible optical communication. The device comprises an LED (Light Emitting Diode) controller, a photoelectric receiver, a safety management host and a user host. The LED controller is connected with the safety management host. The photoelectric receiver is connected with the user host. A file encryption methodcomprises the following steps of: 1, numbering files in a unified manner through a file permission management program, hiding in ciphertexts of the files, and distributing to users; 2, numbering fileusers in a unified manner through the file permission management program, and correspondingly establishing a permission database according to user permissions and numbers of the encrypted files; 3, encrypting information and secret keys in the permission database through the file permission management program, and broadcasting the information in a restrictive region through interface equipment; 4, decrypting the permission information and the secrete keys through a file permission service program, and inquiring the user permissions with input user numbers; and 5, regularly executing the step 3 according to application environment requirements, and updating the permission information and the secrete keys till the system stops working.
Owner:中港大公科技(北京)有限公司

Method and equipment for shielding rubbish short message

The invention discloses a method for screening junk messages and caching the message received in a time interval; by mutually comparing the contents of the messages and taking out the messages which have the same contents or reach a similarity threshold, the messages with different contents are sent; the position information of a terminal device corresponding to the messages with the same contents is obtained; if the position information of the terminal devices corresponding to the messages with the same contents are different, the messages corresponding to the terminal device are sent out; otherwise the invention judges if the amount of the messages corresponding to the terminal device with the same position information reaches a frequency threshold; the messages reaching the frequency threshold and corresponding to the terminal device are deleted; the messages which do not reach the frequency threshold and are corresponding to the terminal device are sent out. The method for screening the junk messages and caching the message received in the time interval overcomes the disadvantages that a 'blacklist' is adopted to prevent and treat the junk message by way of simply limiting a flow, thereby realizing the screening of the junk message, guaranteeing a normal communication in the mode of the message, restraining the junk message, protecting a telecommunication subscriber from being harassed by a large number of junk messages.
Owner:杨沁沁

Mobile platform advertisement filtering method

The invention discloses a mobile platform advertisement filtering method, comprising the following steps: characteristic codes of a mobile advertisement platform are collected and an advertisement code database is established; when an application program is connected to the network and makes a request for data acquisition, a low-level code analyzes the content of the request and acquires the characteristic codes of the request; and the requested characteristics codes are compared with the advertisement characteristic codes in the advertise advertisement characteristic code database, thus the filtering is completed. Based on the mobile platform advertisement filtering method, some advertisement characteristic codes of the mobile advertisement platform are collected, the requested characteristic codes are scanned one by one when the application program makes the request for data acquisition to the network and compared with the advertisement characteristic codes by using the advertisement characteristic codes as the filtering standard so as to finally achieve the reliable characteristic code filtering and prevent the application from acquiring the advertisement codes; the characteristic code database can be regularly maintained and updated with the method to achieve the shielding of latest advertisements and avoid the unshielded advertisement, the effect of advertisement filtering is good, and the reliability is high.
Owner:CHENGDU CK SCI & TECH

Satellite-borne high-power power conditioning unit platform of extensible structure

ActiveCN103619145AGood mechanical conditionMeet environmental test requirementsMagnetic/electric field screeningCircuit arrangements on support structuresPower controllerRemote control
The invention discloses a satellite-borne high-power power conditioning unit platform of an extensible structure. The satellite-borne high-power power conditioning unit platform of the extensible structure comprises a plurality of function modules, remote control and remote measurement flex-rigid printed boards, main error amplifier EMA modules, complete machine bus bars, an upper cover plate, a rear cover plate and side cover plates, wherein the function modules comprises the charge-discharge conditioning modules, the shunt conditioning modules and the remote control and remote measurement modules, the number of the charge-discharge conditioning modules and the number of the shunt conditioning modules are determined according to a power design objective, the main body of each function module is of a wholly-hollowed-out pentahedron structure, the side cover plates are installed after all the function modules are vertically arranged in a stacked mode, every two adjacent function modules are connected with each other through a protruding lug, each remote control and remote measurement flex-rigid printed board is installed in a cavity in the top of the corresponding function module, each error EMA module and each complete machine bus bar are installed in two cavities in the back side of the corresponding function module respectively, and the overall arrangement of the interior of each function module is layered and three-dimensional. The satellite-borne high-power power conditioning unit platform of the extensible structure can meet the environmental testing requirement of satellite-borne electronic equipment and can also meet the heat radiating requirement of a complete machine.
Owner:NO 513 INST THE FIFTH INST OF CHINA AEROSPACE SCI & TECH

Plastic shell connector with shielding and high-voltage interlocking structure

The invention discloses a plastic shell connector with a shielding and high-voltage interlocking structure, which comprises a plug and a socket, wherein the plug comprises a plug shell and a plug rubber core; the socket comprises a socket shell and a socket rubber core; a plug shielding net is sheathed on the plug rubber core; a connecting part is arranged on the outer wall of the plug shell, an elastomer is arranged on the connecting part, a holding hole is arranged on the connecting part, a plug interlock piece is arranged in the holding hole, and the plug interlock piece comprises a bending part, mounting parts and a stopping and guiding part; a snap is arranged on the elastomer; a socket shielding net is sheathed on the socket rubber core; a buckling plate is arranged on the socket shell, and a buckle matched with the snap is arranged on the buckling plate; the plug interlock piece is arranged on the buckling plate and comprises a buckling part and a stopping part; and when the plug is inserted into the socket, the buckling part is positioned between the two mounting parts, and the stopping part is positioned in the bending part. According to the connector, the technical problems of the irradiation to outside and the control of a high-voltage interlock signal circuit on a main circuit can be solved.
Owner:SHENZHEN BUSBAR SCI TECH DEV

Method for handling oscillation alarm in network management system and apparatus

The present invention discloses a method for handling an oscillation alarm in a network management system and an apparatus. The method comprises the steps of determining whether the received message is an alarm reporting message or an alarm resuming message; further determining whether duration of the alarm reporting message is greater than or equal to a predetermined oscillation time threshold value if the alarm reporting message is determined to meet an alarm condition in a predetermined sustained oscillation alarm pool, and if so, determining that an alarm corresponding to the alarm reporting message does not oscillate; reporting the alarm reporting message to the network management system if the alarm reporting message is determined not to meet the alarm condition in the predetermined sustained oscillation alarm pool; and determining whether the duration of the alarm reporting message corresponding to the alarm resuming message is less than the predetermined oscillation threshold value and if so, determining the alarm reporting message corresponding to the alarm resuming message oscillates. The method for handling the oscillation alarm in the network management system and the apparatus achieve shielding of oscillation alarms for the NMS in a network element management system with fewer system resources.
Owner:ZTE CORP
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