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115 results about "File device" patented technology

In Unix-like operating systems, a device file or special file is an interface to a device driver that appears in a file system as if it were an ordinary file.

Electronic issuing system and publication issuing method

The invention provides an electronic issuing system. The electronic issuing system comprises a content processing node and terminal equipment, and is characterized in that the electronic issuing system further comprises a copyright authorizing center and an equipment certificate issuing node, wherein the copyright authorizing center is used for generating a copyright object file, issuing a digital certificate for a user, providing a corresponding private key and providing database service; the content processing node is used for encrypting a publication by using a secret key (Key) so as to generate a content object file; the equipment certificate issuing node is used for receiving the digital certificate and the corresponding private key issued by the copyright authorizing center and burning the digital certificate and the corresponding private key into the terminal equipment; and the terminal equipment is used for acquiring the content object file and the copyright object file, and thus acquiring the secret key (Key) through the private key in the terminal, and decrypting the publication in the content object file into a plaintext. The invention further provides a corresponding electronic issuing method for the publication. Through the electronic issuing system and the electronic issuing method, issued information can be encrypted in a certification process; encrypting levels can be graded; and software encryption and hardware encryption are combined to improve the encrypting security and the encrypting flexibility.
Owner:新华通讯社新闻信息中心

Voice-data-based file searching method, voice-data-based file device and voice-data-based file system

The invention provides a voice-data-based file searching method, a voice-data-based file device and a voice-data-based file system. The method comprises receiving a file searching request send by a client, wherein the file searching request comprises the voice data applied to searching; analyzing the voice data so as to generate voice identifications of the voice data; searching in a voice identification base that whether the voice identifications of the voice data exist in the voice identification base or not, wherein the voice identification base comprises a plurality of files and the voice identifications of the plurality of voice data, and the plurality of voice identifications respectively correspond to the plurality of files; and acquiring the files corresponding to the voice identifications by a cloud server, and returning the files corresponding to the voice identifications by the cloud server if the voice identifications of the voice data exist in the voice identification base. The method ensures that a user can search corresponding files by inputting the voice data, provides a brand-new file searching mode for the user, simplifies operation process of the user, improves file searching efficiency and improves user experience.
Owner:BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD

Core-shell gadolinium indium antimony base composite magnetic-particle photochemical catalyst as well as preparation and application thereof

The invention relates to core-shell catalytic materials, namely, Gamma-Fe2O3-Gd3-xInxSbO7 (0.5<=x<=1), SiO2-Gd3-xInxSbO7 (0.5<=x<=1), and MnO-Gd3-xInxSbO7 (0.5<=x<=1); the grain sizes of Gamma-Fe2O3, SiO2 and MnO are 0.06-2Mum, the grain size of the Gd3-xInxSbO7 (0.5<=x<=1) after being wrapped with a shell is 0.08-1.2Mum. The invention also relates to an application of the core-shell catalytic materials, and the application is as follows: a reaction system composed of a magnetic field device and the core-shell photochemical catalyst material is utilized to degrade organic pollutants such as chlorophenasic acid, atrazine, diuron, crystal violet and the like in waste water, the magnetic filed device is a strength adjustable alternating magnetic field generator, the magnetic field intensity is 0.5-5T, and a light source is an xenon lamp or a high pressure mercury lamp; the percents by volume of the three magnetic composite photochemical catalytic materials are all one third, the three magnetic composite photochemical catalytic materials are uniformly distributed in an aqueous solution, an edge filter (Lambda is 420nm) is adopted, and oxygenation and aeration are adopted simultaneously; and the whole illumination reaction is carried out in an airtight and light-proof environment. A novel catalyst is loaded on the magnetic particles by adopting a multitarget magnetic control sputtering deposition method, a pulse laser sputtering deposition method or a metal organic chemical vapour deposition method. Gd3-xInxSbO7 powder (0.5<=x<=1) is taken as a catalyst, or the three magnetic composite photochemical catalytic materials are respectively loaded with Pt, NiO and RuO2 to be taken as auxiliary catalysts, the light source is the xenon lamp or the high pressure mercury lamp, and water is decomposed in an illumination reactor in an airtight glass pipeline controlled by a plurality of valves to produce hydrogen.
Owner:NANJING UNIV

Filling method and device of three-dimensional package vertical through hole

The invention discloses a filing device of a three-dimensional package vertical through hole. The filling device comprises a metal liquid spraying device and a filling working region and is characterized in that a crucible is of an internally-externally nested circular ring type structure, a cavity between an internal accommodating cavity and an external accommodating cavity is filled with a filling material, a press sheet is driven by a transmission rod connected with piezoelectric ceramic to squeeze a metal liquid in a central hole to be sprayed from a spraying hole, the crucible is connected with the upper part of the cavity by a crucible support connected with a three-dimensional motion controller, so that the crucible moves freely and is matched with a substrate of the filling working region to complete filling. The invention also discloses a method applying the above device for filling the three-dimensional package vertical through hole. With coordination of the metal liquid spraying device and a working platform of the filling working region, uniform liquid drops can be formed, the frequency is controllable, a steady-flow liquid line also can be formed, and metallic filing of the three-dimensional package vertical through hole is achieved. The filling device has the advantages of high size accuracy, low porosity, high filling efficiency, low cost and simplicity in process, and can be automatically produced.
Owner:DALIAN UNIV OF TECH
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