33 results about "Fundamental solution" patented technology

The invention discloses a method for imposing norms in the electromagnetic field edge element method, comprising: establishing a three-dimensional model of an object to be analyzed, and performing grid division on the three-dimensional model; calculating the magnetic vector of the edge unit after division The element matrix corresponding to the potential double-curl term, the Coulomb gauge term, and the current density term is integrated to form the overall finite element equation; the corresponding boundary conditions are applied to the overall finite element equation; the overall finite element equation with corresponding boundary conditions is applied Solve to obtain the only basic solution of the magnetic vector potential, and post-process the obtained basic solution of the magnetic vector potential to obtain the corresponding solution of the electromagnetic field. On the premise of ensuring accuracy, the present invention effectively solves the uniqueness problem of the magnetic vector potential in the edge element method; avoids the problem of complex spanning tree construction in the traditional method; at the same time, the efficiency is higher than that of the lager adopted in the edge element The method of imposing a Coulomb gauge by the Langerian multiplier method.

The invention relates to the technical field of industrial waste residue treatment, in particular to a method for processing white mud industrial waste residue in pulp mills. In this method, calcium carbide slag is sent to the digestion drum slag extractor to be mixed with Na 2 CO 3 The causticization reaction occurs, and after the reaction is completed, the product is placed on the belt folding machine and washed with industrial wastewater, so that the NaOH remaining in the reaction product enters the collection tank, and the washed reaction product is mixed with white mud evenly, and then placed on the pre-hanging machine Carry out suction filtration to make the moisture ≦ 30%, and obtain white mud residue and dilute white liquor after suction filtration. The finally obtained white mud slag has a moisture content below 30%, calcium carbonate content above 92%, and residual alkali below 1%. After treatment, white mud and calcium carbide slag can be used in titanium dioxide factories to neutralize waste acid (sulfuric acid) with a concentration of 30%. Using it will fundamentally solve the problem of high-efficiency utilization of lime mud and calcium carbide slag, and form a new treatment process for comprehensive utilization, turning harm into benefit and turning waste into wealth.

The present invention relates to a service signature method compatible with Android applications, including: S1: list all data files of the application software package except for the signature of the developer, and complete the service signature operation compatible with Android applications; S2: use the service The self-identity certificate or identity public key is used to verify the service signature of compatible Android applications. In the present invention, the digital signature of the same Android application package will not conflict with the signature of the developer of the application, and the Android applications of different release versions obtained by multi-party re-signature can retain user data when updating and installing; and the service party signature The data is stored in directories related to the domain name of the service party and the business name, and the signature data of different service parties do not interfere with each other, and different business signatures do not affect each other, which fundamentally solves the problem that the signature file names of the traditional application signature mechanism are prone to collision. The invention also discloses a service signature device compatible with Android applications.

The invention discloses a call / shared communication device used in explosive gas environment and non-hazardous area. The power control box in the non-hazardous area, the ordinary telephone station connected to the power supply control box, the explosion-proof equalizer, and the explosion-proof telephone station are connected to the power control box and the ordinary telephone station through communication cables. Its beneficial effects are: it fundamentally solves the unsolved problems of the communication system for many years, and provides an easy-to-use, safe and reliable, flexible expansion, reasonable design, wide application range, convenient wiring, and reliable sealing for the explosive gas hazard communication field. communication tool. Realize the call function, and can communicate with people anywhere in the factory enterprise.