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52results about How to "No need to consume resources" patented technology

Novel ultra-lightweight QTL (Quasi-Transmission Line) block cipher implementation method

The invention discloses a novel ultra-lightweight QTL (Quasi-Transmission Line) block cipher implementation method. According to the method, a novel generalized Feistel network structure is designed; the structural algorithm overcomes the defect that only a half of grouped data is changed during one-round iterative operation of the conventional Feistel network structure, and realizes that all grouped data is changed by the one-round iterative operation. F functions in the round operation of the algorithm comprise an F1 function and an F2 function; S1 and S2 boxes are adopted respectively; the conversion process of the F functions comprises round key add, S box substitution, P replacement and S box substitution; different S box and P replacement only requires hardware connection; the F function of the light super S box is constructed. The algorithm structure is highly symmetric, an encryption module is decrypted and multiplexed by the algorithm, decryption can be performed by exchanging an encryption round key use sequence, the operation is easy and convenient, and extra resource is not required to be consumed by the decryption. Compared with the current lightweight password, the occupied resource is smaller, the encryption performance is high, and known attack can be resisted.
Owner:HENGYANG NORMAL UNIV

Inter-phase voltage-sharing control method for DC bus of cascaded star-connected static synchronous compensator (STATCOM)

The invention discloses an inter-phase voltage-sharing control method for a DC bus of a cascaded star-connected static synchronous compensator (STATCOM). The voltage-sharing control method comprises the following steps of regulating a d-axis component of a modulation wave output from a current ring according to the deviation between DC voltages of a phase A and a phase B and a reference value; converting dq-abc conversion on the modulation, wherein a negative-sequence component is overlaid with the modulation wave, so that the output of the STATCOM generates the negative-sequence voltage. The negative-sequence voltage is used for generating a negative-sequence current, the negative-sequence voltage, the negative-sequence current, positive-sequence current and positive-sequence voltage are separately used for changing allocation of three-phase power flow, and the balance among three phase DC voltages is achieved. In the voltage-sharing method proposed by the invention, a mode of overlaying the negative-sequence modulation wave is simple and is easy to implement, the stability of the current ring is not affected, meanwhile, the introduced modulation wave zero-sequence component is also removed, over-modulation caused by the zero-sequence component is avoided, and the reliability of STATCOM running is improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Construction method with aluminum alloy formworks as gravity type highway retaining wall formwork and retaining wall

The invention discloses a construction method with aluminum alloy formworks as a gravity type highway retaining wall formwork and a retaining wall and relates to the technical field of building construction. The technical problems that according to traditional formworks, the construction quality requirements of the gravity type retaining wall built at a mountain highway section adjacent to a cliff or a river cannot be meet, in addition, potential safety hazards exist, and forest resources are excessively consumed are relieved. According to the construction method with the aluminum alloy formworks as the gravity type highway retaining wall formwork, the aluminum alloy formworks are adopted to be assembled into the retaining wall formwork in a sectioned mode on a spacious site firstly, then the retaining wall formwork is hoisted to the designed position and fixed, and then concrete is poured; the construction quality requirements of the gravity type retaining wall built at the mountain highway section adjacent to the cliff or the river can be meet, besides, safety accidents can be reduced to the maximum limit, the construction speed can be also improved, and the constriction period is shortened; and meanwhile, the collapse phenomenon can be avoided, wood resources do not need to be consumed, and thus the energy-saving and environment-friendly beneficial effects are achieved. The retaining wall can take the effects of slope protection and edge protection for a long time.
Owner:江苏燕宁工程科技集团有限公司

Efficient filtering equipment for sewage treatment

The invention discloses efficient filtering equipment for sewage treatment. The equipment comprises an equipment base body, a water inlet is formed in the upper end of the equipment base body; a circular groove communicated with the water inlet is formed in the side wall of the equipment base body; a rotary disc is coaxially, hermetically and rotatably connected into the circular groove; a plurality of through holes with different sizes are formed in the side wall of the rotary disc, a water wheel is coaxially and fixedly connected to the side wall of the rotary disc, a water outlet communicating with the interior of the circular groove is formed in the side wall of the equipment base body, a filter screen is embedded in the water outlet, and a buoyancy scraper matched with the filter screen is slidably connected into the water outlet. Sewage flows out through the through holes with different sizes, and the liquid level in the water outlet can continuously fluctuate up and down, so that the buoyancy scraper in the water outlet moves up and down along with the liquid level, garbage and impurities adhered to the filter screen can be scraped into a storage tank under the filter screenin time, good permeability of the filter screen is kept, and the sewage treatment efficiency is further improved.
Owner:中节能(西安)生态环保有限公司

Preparation device for ceramic bond of ceramic diamond grinding wheel

The invention relates to the technical field of grinding wheel machining, in particular to a preparation device for a ceramic bond of a ceramic diamond grinding wheel. The preparation device comprises a shell, a grinding disc and an annular groove; the grinding disc is arranged in the shell; a rotating shaft is fixedly arranged at an eccentric position of the top of the grinding disc; the annular groove is coaxially and fixedly arranged on the shell in a sleeving mode; an annular piston plate is arranged in the annular groove; a plurality of control mechanisms for driving the annular piston plate to reciprocate are fixedly arranged at the top of the annular piston plate; the control mechanisms penetrate through the annular groove, extend out of the annular groove and are finally rotationally connected with the rotating shaft; and a plurality of uniformly distributed vent holes are formed in the junction of the annular groove and the shell. According to the preparation device, the grinding disc, the rotating shaft, the annular piston plate and the control mechanisms are arranged, so that when the rotating shaft rotates, the grinding disc can be driven to rotate eccentrically to grind materials, the annular piston plate can be driven to reciprocate, the function of indirect air leakage is achieved in the reciprocating process of the annular piston plate, and the drying and grinding effects on the ceramic bond are improved.
Owner:南通尚东磨具有限公司

Method and system for dynamically detecting program third-party library and performing security assessment

The invention provides a method for dynamically detecting a program third-party library and carrying out security evaluation. The method specifically comprises the following steps: obtaining vulnerability lists of an authority information security vulnerability library and a custom information security vulnerability library; scanning the program third-party library according to the authority information security vulnerability library and the vulnerability list of the custom information security vulnerability library to obtain vulnerability information of the program third-party library; performing security assessment on the program third-party library according to the vulnerability information of the program third-party library, wherein the custom information security vulnerability librarycomprises a custom information security vulnerability library set for a non-open-source third-party library. The pertinence of the vulnerability list can be enhanced through the vulnerability list obtained by the custom information security vulnerability library; meanwhile, an interface can be set at will in the vulnerability list of the custom information security vulnerability library, so thatthe method is combined with user behaviors, convenient to expand, good in expansibility and high in flexibility; and the detection efficiency of the third-party library security evaluation based on the file system software review is improved.
Owner:SECZONE TECH CO LTD

Cutting device and method for building materials used in construction site

The invention discloses a cutting device and method for building materials used in a construction site. The cutting device comprises a water collecting tank, a vertical plate I and a vertical plate II. The vertical plate II is arranged on the side, away from the vertical plate I, of the water collecting tank. The cutting device and method for the building materials used in the construction site has the beneficial effects that a pressuring machine, a water lance head, a water quantity valve and a water proof cover are arranged, so that the cutting edges of the building materials are more orderly, the cutting speed is accelerated, and the cutting efficiency is improved; a first filter plate and the water collecting plate are arranged, the dust produced by the building materials during cutting can be eliminated and collected, the health damage from the dust to workers is reduced, and the pollution of dust to the environment is reduced; a rolling device, a sliding device, a data interfaceand a controller are arranged, so that the pattern cutting process of the building materials is automatically completed, and the cutting efficiency is greatly improved; and a water pump, a water pumping opening, a water inlet pipe and a telescopic water pipe are arranged, so that the cutting tools of the building materials can be recycled without the need for consuming more resources.
Owner:GUANGXI JIAZHIBAO NETWORK TECH CO LTD
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