30results about How to "Excellent design result" patented technology

The invention relates to the field of aerospace primary load bearing thin-walled component design and provides a gradient distribution type rib barrel shell structure. According to the gradient distribution type rib barrel shell structure, gradient distribution type ribs are rationally arranged in a barrel shell stiffness mutation area and other vulnerable areas, so that the overall stiffness of the structure is more evenly distributed, extension of local buckling deformation of the stiffness mutation area and the other vulnerable areas is effectively restrained, the stress concentration destruction phenomenon is reduced, and the bearing capacity of the barrel shell structure is ultimately improved; the number, the size and the layout information of the gradient distribution type ribs are determined according to the diameter, the height and the thickness of the barrel shell structure; the reinforcing efficiency of the stiffness mutation barrel shell structure can be remarkably improved, and the barrel shell structure is simple in process and can be produced on a large scale.

The invention relates to the technical field of electrical engineering, and discloses a design method for a dance-dispelling and ice-melting transformer that takes into account both wide voltage regulation and finely adjustable current. The method includes: determining the rated current of the secondary side of the transformer according to the maximum value of the deicing and melting reference currents of all wires to be deiced; Calculate the highest and lowest ice-melting DC voltage required by the DC ice-melting device; determine the number of transformer gears according to the ratio between the highest ice-melting DC voltage and the lowest ice-melting DC voltage; The current is equivalent to the current of different transformer gears unified in the rectifier series and ice-melting two-phase series mode, and the output voltage of each gear of the ice-melting transformer is designed so that the ice-melting currents corresponding to different gears do not overlap and are different. The equivalent output voltages of the gears have no cross-overlap.

A finned microchannel design method for 3D‑SIP radio frequency microsystems. Firstly, the design area is discretized, and the finite element model is initialized according to the actual working conditions and the permeability and thermal conductivity introduced by Darcy flow. Perform finite element analysis on the flow model and convection-diffusion equation, and then use the obtained physical field information to calculate the objective function, constraint function and the sensitivity of the constraint function to the design variables, and iterate continuously under the update of the MMA algorithm until it meets the requirements allowed in the design process. The maximum fluid volume ratio v 0 And the maximum inlet and outlet pressure difference ΔP allowed in the design process limit , or the number of iterations reaches the set maximum number of iterations loopmax, the present invention does not rely on design experience, and can use the Darcy flow model in the design stage to calculate the approximate physical field parameters of the design domain through the finite element method to obtain the chip liquid cooling device Performance parameters improve design reliability, have higher design efficiency, better design results, and reduce design costs.

The invention provides a design method of an airborne computer board level low DC Impedance coplanar electromagnetic band-gap power supply layer. The equivalent model is constructed first, then initialization of the finite element model of the base structure is performed, then the flexible growth unit is constructed, then finite element analysis is performed, then adaptive growth is performed, andgrowth competition and configuration reconstruction are iterated under the updating of the MMA algorithm until the material consumption reaches the maximum value beta0 set in initialization. The performance parameters of the power supply layer can be obtained through the finite element method in the design stage so as to enhance the reliability of the design, have higher design efficiency than that of the conventional design, obtain better design result and reduce the design cost.

The invention discloses a high-gain dual circularly polarized antenna structure based on metasurface loading, which solves the shortcomings of traditional microstrip patch antennas, such as low radiation gain and limited bandwidth, and the invention includes two radiation units with the same shape , the radiation unit includes a metasurface structure 1 , a patch group, a multilayer dielectric substrate and a feed network 9 . Under a compact caliber, the present invention introduces a 4×4 square ring-shaped metasurface structure to improve the gain of the antenna. It is applied in high-gain, high-isolation systems such as identification (RFID).

The invention relates to a parameter design method of a phase-shifted full-bridge converter based on a ZVS load range, comprising: according to the input voltage V in with the output voltage V o gain, and the system allows the maximum duty cycle loss D loss_max , to calculate the primary and secondary turns ratio n of the transformer; according to the output filter inductance L 0 The principle of volt-second balance, and the output inductor current ripple coefficient α, calculate the output filter inductor L 0 ; According to the volt-second balance principle of the resonant inductance Lr, the structure is about the ZVS soft switching range λ and at λI o The duty cycle is lost under load condition D loss_λ function λ 1 (L r ,D loss_λ ); according to the realization condition of lagging arm soft switching, take the energy stored in the resonant inductor Lr and the lagging arm parallel capacitor C lag The energy required to complete the commutation is equal to the critical condition, and the constructor λ 2 (L r ,D loss_λ ); the solution satisfies the critical soft-switching condition λ 1 (L r ,D loss_λ )=λ 2 (L r ,D loss_λ ) set M(λ,L) of all points r ,D loss_λ ), determine the optimal solution (λ,L r ,D loss_λ ). This method can realize the simple and intuitive screening and design of the circuit parameters of the phase-shifted full-bridge ZVS converter.

The present invention relates to a method for automatically designing radiotherapy plans for nasopharyngeal carcinoma based on machine learning, which provides data based on an organ volume histogram (Overlap Volume Histogram, OVH) and combines the nearest neighbor method of machine learning to search for the best objective function for patients Methods. Use the existing data to build a template library, use the machine learning nearest neighbor method to search for the most similar cases between the OVH data of newly enrolled patients and the template library, and use the objective function of the template cases found to search for newly enrolled cases radiotherapy plan design. In the case of no need for strong human subjective factors, the case template is searched, and the patient's nasopharyngeal carcinoma radiotherapy plan is automatically designed.

The invention relates to a double-wave-structure hub modeling method for a single-stage fan / air compressor. The metal blockage effect of a rotor blade row and a stator blade row of the single-stage fan / air compressor is considered in the design process of a hub. The control parameters such as the blade tip weighting function, the blade root weighting function, the maximum concave position forward movement amount, the front end magnification ratio, the rear end magnification ratio and the smoothness parameter are introduced. A double-wave structure hub shape is formed after modeling. The control parameters are adjusted through an overall optimization algorithm in the modeling process. The hub curve when the heat insulation efficiency is highest is the optimized hub curve. The end area flow of the hub after optimization is improved. The flow capacity is increased. The work range of the fan / air compressor is widened. The overall performance of the fan / air compressor is improved.

The invention discloses a continuous state routing algorithm of a satellite link network, which comprises the following steps: (1) registering the time of switching between a link connected state and a link unconnected state within the entire simulation time, and establishing a link state switching table; (2) searching and recording paths within the entire simulation time; (3) filtering the pathsand storing the optimal one; and (4) performing full-path integration by using the Dijkstra shortest path algorithm. The routing algorithm disclosed by the invention is different from the traditionalsatellite link network routing algorithm in that: the routing algorithm continuously records and uses the time-varying dynamic topology of the satellite link network within the entire simulation timewithout simplifying the topology into discrete static topology by dividing time intervals. The routing algorithm stores the most complete network dynamic information, thus the best routing design result can be provided; and moreover, the numerical form is simple, the paths are filtered in the path registration process, thus the workload of full-path integration is reduced.

The invention relates to a topological optimization design method for a cold plate liquid flow channel of an electric-electronic integration module. The method comprises the following steps: firstly establishing a finite element module, setting a growing initial point and finishing parameter initialization of self-adaption growth; then protocoling a self-adaption growth strategy of the cold plate liquid flow channel and giving out a method for determining growth direction and furcation of the cold plate liquid flow channel; finally performing step-by-step iteration growth of the cold plate liquid flow channel. By means of the topological optimization design method disclosed by the invention, optimized cold plate liquid flow channel distribution can be directly obtained; meanwhile, constraint of ground structure nodes is got rid, and the optimized cold plate liquid flow channel distribution is closer to the optimal result; an excessive demand that a designer has a lot of design experience is avoided, work of simulation, improvement and repeated simulation is prevented from being repeated, and work efficiency and design quality are obviously improved.