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883results about How to "Guaranteed cost" patented technology

Long-distance encryption method and device, management method and device, as well as encryption management method and device

ActiveCN102013982ASolve the problem that all POS terminals cannot be remotely managedSolve problemsUser identity/authority verificationPlaintextCiphertext
The invention provides a long-distance encryption method and device, a management method and device, as well as an encryption management method and device. The encryption method comprises the following steps: a POS (point of sales) terminal sends a request massage to a TMS (terminal management system), receives a response authentication request massage sent by the TMS, calculates according to the terminal authenticating data plaintext, downloading work key ciphertext and downloading maintaining secret key to obtain the second terminal authentication ciphertext, and judges whether the second terminal authentication ciphertext is the same as the first terminal authentication ciphertext, and if the authentication ciphertexts are the same, the TMS authentication ciphertext is encrypted to obtain the TMS authentication ciphertext; and the POS terminal sends the responding authentication massage to the TMS, and receives the secret key plaintext comprising secret key ciphertext sent by the TMS. In the invention, the problem that the long-distance terminal maintenance management TMS can not remotely manage and maintain all the POS terminals is solved, thereby reducing the cost for maintaining the POS terminal and improving the satisfaction degree of users.
Owner:CHINAUMS

Method for producing alcohol ether fuel from hydrogen prepared from coke oven gas and synthesis gas prepared from scorched particles

InactiveCN101125796AReduce pollution and waste of resourcesReduce equipment investment and operational riskOrganic compound preparationHydroxy compound preparationChemistryEther
The invention discloses a manufacturing method of alcohol ether fuel which is produced by synthesis gas while the synthesis gas is produced by hydrogen and scorched particles collaboratively, and the hydrogen and scorched particles are made by coke-oven gas. The method comprises the processes of gas making, rough decoking, fine decoking, pretreatment of coke-oven gas, adsorption and extraction of hydrogen through transformation, methyl alcohol synthesis and methyl alcohol rectification, the alcohol ether fuel is made after the processes. The invention makes use of abandoned scorched particles to prepare water gas and takes advantage of PSA technique to extract hydrogen in coke-oven gas, and alcohol ether fuel is synthesized after adding water gas. Furthermore, the rest materials with higher thermal value are returned to a coke oven to be used as fuel, thus, coke-oven gas firstly is avoided to be blown down and environment pollution and resource waste are reduced; secondly, a single transforming process for preparing methyl alcohol by coke-oven gas, equipment investment and operation risk are avoided; thirdly, the processes of carbon monoxide conversion and decarburization are reduced so as to ensure the integrative use of carbon resources in the system, pyrogenic gas is used rationally and effectively and cost and operation difficulty of methyl alcohol is reduced so as to guarantee the continuous and steady run of system and realizing a plurality of advantages of environmental improvement, rational use of resources, reduction of cost, reduction of working procedure.
Owner:TOWN STAR IND +1

Alternating power flow calculation method and device for light HVDC transmission system

The invention provides an alternating tidal current computing method and device for a light high-voltage direct current transmission system; the alternating tidal current computing method comprises the following steps of: dividing the whole system into two parts of an alternating current subsystem and a direct current subsystem by using a busbar of an alternating current system as a dividing line, wherein the alternating current system is connected with a converter station; treating the converter station of the alternating current subsystem as an equivalent PQ or PV node on an alternating current node when the variable quantity of the operational state of the alternating current subsystem is solved; and modeling an alternating system as a constant voltage applied on the bus of the converter when an equation set of a direct current system is solved. The alternating tidal current computing device for the light high-voltage direct current transmission system comprises a data acquisition unit, a data transmitting unit and a data processing unit. The invention has the advantages of being simple and easy in implementation, being good in procedure generality, overcoming the disadvantages of bad timeliness, high error rate and the like and increasing the computation speed and correctness. The device adopts a double-port RAM (Random Access Memory) circuit so as to solve the problem of low data transmission speed; and a set of spare double-port RAM (Random Access Memory) is added for ensuring the correctness and reliability of the system operation.
Owner:NORTHEASTERN UNIV

Node access authentication method, access authenticated node, access node and communication system

The invention discloses a node access authentication method, an access authenticated node, an access node and a communication system. The method comprises the following steps: the access authenticated node receives the access request information sent by the access node, wherein the access request information comprises an authentication extension header and an authentication code which are packaged in a next-generation IPv6 (internet protocol version 6) data packet; the authentication extension header comprises the algorithm field; and the authentication code is computed by a first computing method according to the algorithm corresponding to the algorithm field, a shared key configured in the access node and the information except the authentication code in the IPv6 data packet; and the access authenticated node packages the received IPv6 data packet in the access request information and sends the access request information to an AAA (authentication, authorization and accounting) server so that the AAA server authenticates the access node. The technical scheme adopted by the invention can be applied in the 6LowPAN (personal area network), realize access authentication of the node on the IP layer and effectively improve the safety of network communication.
Owner:CHINA UNITED NETWORK COMM GRP CO LTD

Section steel column for high-rise building section steel concrete combination structure, and construction method thereof

The present invention discloses a section steel column for a high-rise building section steel concrete combination structure, and a construction method thereof. The section steel column comprises a plurality of column sections, wherein the column sections are sequentially connected from bottom to top, an interface position of two optionally adjacent column sections is provided with an inner sleeve interface, and an outer side wall of a connection position of the two adjacent column sections is provided with a buckle fixation type assembly. The construction method comprises that: the insert-connection type initial positioning of the two adjacent column sections is achieved through the inner sleeve interface; the cross extending line and the buckle fixation type assembly are combined to carry out positioning correction on the column; a scale measurement method is adopted to carry out column scale height adjustment; and the cross extending line and the buckle fixation type assembly are combined to carry out verticality correction on the full length of the column sections. With the section steel column of the present invention, the model of one construction interface in each floor of the traditional section steel column can be increased to the model of one construction interface in every two floors or three floors, such that more than half of the construction interfaces of the section steel column can be saved, the probability of deviation error due to construction interface operation can be greatly reduced, and the guarantee degree of installation quality can be improved.
Owner:广东中城建设集团有限公司 +1

Sensor-network-based low-energy-consumption ecological environment monitoring node deploying method

The invention discloses a sensor-network-based low-energy-consumption ecological environment monitoring node deploying method and relates to the Internet of Things. The method comprises the following steps: firstly determining factors to be monitored and key points with relative factors; building an optimal mathematic monitoring model according to the monitored factors and the key points; then solving the mathematic model and finding a key point with most attributes and taking the key point as a pre-selection point; invoking an attribute optimizing method for selecting the key points with all the attributes which are close to an attribute mean value if the number of the pre-selection points is greater than 1; invoking a crop growth factor weighing method for determining monitoring points if more than two pre-selection points exist after the treatment; randomly determining that the pre-selection points processed by the crop growth factor weighing method are taken as the monitoring points by using a random algorithm; finally processing a matrix T formed by the key points and the attributes by using a matrix optimizing method of the key points and the attributes to obtain the number of the final monitoring nodes and the distribution positions of the monitoring nodes.
Owner:XIAMEN UNIV

Method for producing industrial grade monoammonium phosphate through combination of wet process phosphoric acid and high-purity phosphoric acid

The invention discloses a method for producing industrial grade monoammonium phosphate through combination of wet process phosphoric acid and high-purity phosphoric acid. The method comprises the steps of performing neutralization reaction for two times on filtrate and ammonia gas or ammonia water to obtain ammonium phosphate slurry, wherein the filtrate is obtained by performing desulfurization reaction on phosphate rock powder and wet process phosphoric acid; performing concentration, crystallization and drying by using filtrate which is obtained by adjusting the pH value with high-purity phosphoric acid to obtain an industrial grade monoammonium phosphate product; removing most of impurity ions when the pH value is neutralized to 4.0-5.0 by the first neutralization reaction, then performing the second neutralization reaction to remove impurities in the wet process phosphoric acid, finely adjusting the pH value to 3.9-4.4 by using the high-purity phosphoric acid, and performing concentration and crystallization to obtain the industrial grade monoammonium phosphate. The method disclosed by the invention reduces the production cost and energy consumption and is environment-friendly and pollution-free; the obtained product is stable in quality, the process flow is short, the device construction investment is saved, the needed operators are less, the energy consumption is reduced, the pollution is reduced, and the quality of monoammonium phosphate is ensured through effective impurity removal, so that the method has a very good economic benefit.
Owner:GUIZHOU KAILIN GRP CO LTD

Wafer-grade vacuum encapsulation process for micro-electro-mechanical system

A wafer-grade vacuum encapsulation process for a micro-electro-mechanical system belongs to an encapsulation method for a micro-electro-mechanical system and solves the problems of the film deposition-based vacuum encapsulation process that the deposited film is thin, has small chamber and is easy to be damaged and the encapsulation device has leaked vacuum and reduced service life. The process sequentially comprises a step of depositing an air absorbent, a step of depositing a thin sacrificial layer, a step of depositing a cushion chamber sacrificial layer, a step of depositing thick sacrificial layer, a step of preparing an encapsulation cover, a step of etching a releasing hole, a step of removing sacrificial layer and a step of sealing. The process solves the problems that the existing encapsulation method has short vacuum retaining time, low sealing quality, large encapsulation dimension, incompatibility between the process and the standard IC process and high cost, thus ensuring the air pressure in the inner-most chamber; and simultaneously, the cost of the process is less than that of the vacuum encapsulation based on wafer-bonding process, and the process can realize production in general IC production factories and greatly promote the development and generalization of wafer-grade MEMES vacuum encapsulation technology.
Owner:HUAZHONG UNIV OF SCI & TECH

Architecture for realizing dual-screen interconnection of vehicle-mounted entertainment system and instrument through SPI channel in an FPD-Link III

The invention relates to architecture for realizing dual-screen interconnection of a vehicle-mounted entertainment system and an instrument through an SPI channel in an FPD-Link III. The architecturecomprises a vehicle-mounted entertainment processor, an instrument processor, an SPI controller of a vehicle-mounted entertainment system side, an SPI controller of an instrument side, an FPD-Link IIIwiring harness, a LVDS encoder DS90UB949 and a LVDS deserializer DS90UB940, the SPI controller of the vehicle-mounted entertainment system side is connected with the vehicle-mounted entertainment processor, the LVDS encoder DS90UB949 is connected with the SPI controller of the vehicle-mounted entertainment system side, the SPI controller of the instrument side is connected with the instrument processor, the LVDS deserializer DS90UB940 is connected with the SPI controller of the instrument side, and the LVDS encoder DS90UB949 and the LVDS deserializer DS90UB940 are connected through the FPD-Link III wiring harness. The architecture can effectively meet the rapid transmission of application data, pictures, texts and other information during the dual-screen interconnection of the vehicle-mounted entertainment system and the instrument, and ensure the instantaneity of user operation response.
Owner:YANFENG VISTEON ELECTRONICS TECH NANJING
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