30 results about "Solution structure" patented technology

The invention belongs to the technical field of engineering structures monitoring data analysis, provides a method of the order determination of an engineering structure modal identification model. By the method, each rank frequency of the algorithm preliminary solution structure is achieved through the characteristic values, next the modal response corresponding to each rank frequency is decomposed, then the root-mean-square value of the modal response is solved, and finally the modal response contribution index MRCI is obtained by summing the root-mean-square value of each degree of freedom in the modal response, the rank order and MRCI relationship diagram is generated, the rank order corresponding to the maximum of the ratios of two adjacent rank order MRCI values is found, and the found rank order is taken as the exact rank order for the model. The rank order of the model can be used as a truncation order of a singular value matrix in the characteristic algorithm, and can be used for the accurate identification of modal parameters of structures.

The invention relates to a measurement synchronization method and system for power electronic equipment. The method comprises a data transmission method, a period variable sampling method, and a zero-crossing synchronization method. The system is composed of an AD data sampling module, an AD data receiving and storage module, an AD data packaging module, an AD data sending module, a power grid voltage data analysis module, a zero-crossing time calculating module, a synchronous signal sending unit, a phase-locked loop module, a real-time power grid frequency calculation module and a sampling period adjustment module. According to the solution scheme provided by the invention, the structure of the system is simple and novel and the system is suitable for a digital signal processing chip. The method is simple; application is flexible; and the system and the method can be realized conveniently. A power grid frequency can be tracked in real time; and an actual voltage value, an actual current value, and an actual reactive value can be calculated accurately under the circumstance that the power grid frequency fluctuation is large. The method and system have wide application range and can be applied to an FACTS device and can be applied to all pieces of power electronic equipment needing realization of functions of period variable sampling and zero-crossing synchronization.

The present invention belongs to the computer-aided design of module level layout and features that based on the original problem, and through altering the module size and corresponding lead line position, or module deformation, one serial simple layout problems successively approximating original problem are created and solved. During the successive approximation, one approximating factor Alphais used to control the module deforming degree, and the serial problems are solved successively in the order of increasing approximating degree or decreasing Alpha from the simplest approximated problem until Alpha of 1, that is, the module size is equal to that of original module or the approximated problem is the original problem itself. Meanwhile, the solution structure of the present problemis used as the initial solution structure of the next approximated problem. The algorithm is stable, efficient and has best result obtained and industrial application value.

The invention relates to an opportunity routing algorithm based on network encoding in a satellite network. The opportunity routing algorithm comprises the following steps: S1, modeling the maximum average throughput of the satellite network, wherein modeling elements comprise a source node, a destination node, a relay node, a sending rate of an information source, a performance function of the average throughput, a credit rate, a data packet and a feedback encoding packet; S2, figuring out an optimal solution structure of the model by using the convex optimization theory; S3, compressing feedback information indicating that the data packet is received in a feedback encoding packet by using the encoding feedback technology, and meanwhile, locally maintaining a link state table in each node by using the encoding feedback technology, wherein the link state is the information of the node and an adjacent node and a measurement of the link, and the measurement comprises a Lagrange variable difference of the node and the adjacent node; S4, processing and determining to send a next hop node set of the current data packet and determining the size of the credit rate of each node in the set by the relay node by using an encoding feedback algorithm; and S5, confirming a data segment.

The invention relates to a method of preparing artificial rutile with a ferric salt solution leaching method and belongs to the technical field of chemical metallurgy. The method of preparing high-grade artificial rutile by taking sand titanium concentrates as a raw material is simple in process and equipment, convenient to operate and low in production cost and overcomes the defects of higher energy consumption and difficulty in treating waste liquid. The method comprises the following steps: titanium concentrate strong reduction, ferric salt solution leaching, solid-liquid separation, solid substance washing and drying and filtrate purification. The method of preparing the artificial rutile with the ferric salt solution leaching method enables titanium oxides to form a more stable porous solid solution structure by controlling atmosphere and adopting high-temperature strong reduction, accelerates the leaching reaction speed of iron and prevents titanium-containing particles from pulverizing at the same time; and the obtained artificial rutile as a product is better in particle size distribution and proper in particle size and is an ideal raw material for producing titanium tetrachloride by fluidizing chlorination.

The invention relates to a liquid X ray scattering sample cell. The liquid X ray scattering sample cell comprises a cell body provided with a cavity and a sample cell which is arranged inside the cell body and is open at the top. The cell body is internally provided with a separating plate, and a water inlet pipe and a water outlet pipe are respectively arranged at the two sides of the separating plate; and a mounting shaft is arranged on the side wall of the cell body, and the mounting shaft is connected with a diffractometer side angle head. The liquid X ray scattering sample cell can be applied to a synchrotron radiation X ray multicircle diffractometer experimental facility and also can meet the requirement of a portable temperature control liquid sample cell of a diffractometer in a laboratory, so that the problems that a liquid sample cannot be filled, the temperature is controlled and the liquid sample is convenient to carry when structural information of liquid is measured by adopting an X ray reflection method are solved; and the application range of a powder diffractometer in the research field of solution structures is expanded, and a necessary experiment foundation is laid for carrying out solution X ray scattering new method study.

The invention discloses a multi-index synchronous optimization method and system for an external rotor switch reluctance motor. The optimization method includes the steps that a power constraint condition of an electric vehicle to awheel hub motor is established; a performance index and a structure parameterof the motor power are determined according to the power constraint condition; a motor structure size constraint condition of each structure parameter is established; an orthogonal table of each structure parameter is determined according to each motor structure size constraint condition, wherein the orthogonal table comprises a plurality of levels and corresponding values for each structure parameter, and a first set of orthogonal experiment is carried out; a multi-index synchronous optimization objective function is established according to the results of the first set of orthogonal experiment and the performance index; and an optimal solution structure parameter combination is determined according to the multi-index synchronous optimization objective function and the level of each structure parameter to achieve the synchronous optimization of multiple performance indexes.

The present invention relates to the three dimensional solution structure of receptor interacting protein dead domain (RIP DD), as well as the identification and characterization of various binding active sites of RIP DD. Also provided for by the present invention are methods of utilizing the three dimensional structure for the design and selection of potent and selective inhibitors of TNF signaling pathways.

The invention discloses a device for simulating polymer dissolution degree and injection experiments. The device comprises a cavity with a square outside and a circular inside, a pressure sensing system, a PC and a shearing device, wherein the cavity is provided with a liquid inlet channel, a spherical cavity and a liquid discharge channel which are sequentially communicated, the shearing device is mounted in the spherical cavity, filter screen cake is arranged in the liquid discharge channel, the pressure sensing system is provided with a pressure collecting connector, the pressure sensing system is mounted on the upper end face of the cavity, and the pressure sensing system, the PC and the shearing device are sequentially connected. The device has the advantages that the situation that when a polymer crosslinking body exists and is blocked and retained in the cavity by the filter screen, pressure rises, flowing is stopped, corresponding data collected by the pressure sensor is transmitted to the shearing device for shearing, the solution structure is destroyed greatly by the high-speed shearing, polymer solution viscosity is lowered, the solution passes the filter screen in a small volume manner, and the polymer solution entering a core does not block the core is simulated.

The invention discloses a carrier recovery method based on a multichannel communication receiving system. The method comprises steps that data sent by a transmitter is modulated by DBPSK and intermediate frequency sampling rate is increased by a digital up converter, and the like. The carrier recovery method solves the problems that the conventional frequency and phase locking method cannot lock phases continuously, more and more additional noise can be produced with increased bandwidth of digital phase locked loop, a structure of a solution is complex, difficulty in actual operation and cost increase can be caused and the like through steps of data extraction, handling and transformation, phase compensation and the like, the self-adaption characteristic of the method is improved, system performance consistency is improved, and production flow is simplified.

The invention relates to a downlink interference suppression method for an indoor visible light communication system, and belongs to the technical field of optical communication. According to the method, the optimal dynamic frequency reuse scheme is searched by adopting the improved tabu search algorithm, inter-cell interference and inter-user interference in the visible light communication systemare inhibited, and the communication performance of the system is improved. According to the invention, an interference pattern of a combined receiving and transmitting end is established as a basisfor determining an interference relationship; Designing an algorithm solution structure and a neighborhood structure based on an interference pattern; A tabu table strategy in the tabu process is improved so as to avoid falling into local optimum; And dynamically dividing the frequency band according to the load condition to realize the dynamic multiplexing of the frequency. According to the method, inter-cell interference and inter-user interference in an indoor visible light communication system can be effectively suppressed, and the data rate and the average spectrum efficiency of system communication can be improved on the basis of ensuring the communication fairness.

The invention discloses a three-phase to single-phase test device. The structure is connected by adopting a three-phase to single-phase structure for the first time. The three-phase to single-phase test device comprises a change-over switch module used for connecting a casing and a bus. The three-phase to single-phase test device further comprises a casing assembly used for performing a cable or bus insulation test. The three-phase to single-phase test device has the beneficial technical effects that (1) the solution is compact in structure, and the occupation space is greatly reduced comparedwith a traditional device; (2) test methods for different sizes of products of different manufacturers are unified through the test device, the universality is high, and the field test capability ofcovering various products by one device can be achieved; (3) the test device is simple in structure, mature in field construction process and short in construction period; and (4) the test device provides a convenient insulation test interface, and an insulation test is performed on GIS buses and cables very conveniently.

The invention discloses a cold standby reliability redundancy distribution method and system based on a swarm intelligence algorithm, and aims to solve the problem of RRAP cold standby reliability redundancy distribution so as to optimize the system reliability of a cold standby redundancy system. The cold standby RRAP is also a model of mixed integer optimization programming; and the problem is difficult to solve by using a traditional method. According to the invention, in the cold standby redundancy system, a new solution structure is adopted; the number of variables is reduced by half; thepreprocessing of each variable boundary is found to reduce the solution space; a new SSO updating mechanism is adopted to be combined with elite selection to balance utilization and exploration and new local search so as to improve newly discovered gBest and solve the cold standby RRAP; and the optimal or high-quality solution of the RRAP of the cold standby redundancy system is obtained, the solution quality, the solution feasibility and unused resources of the final optimal solution are greatly reduced, the cold standby redundancy of the server and the like is greatly reduced, and the server operation efficiency of the cold standby redundancy system is improved.

The present invention provides a solution structure of free RGS4 determined using NMR techniques. The structure includes a G alpha binding site and allosteric bindingsite. The structural information provided can be employed to identify, select or design agonists and antagonists of RGS4 activity. The invention includes two dimensional and three dimensional models and representations of the structure of free RGS4 based upon structural coordinates that are provided that are useful in the methods described.

The present invention discloses the solution structure of Bcl-w and Bcl-w complexes as well as methods of using that structural information to screen for and design compounds that interact with Bcl-w or variants thereof.