8 results about "Lambda" patented technology

The invention discloses an all-fiber current transformer and a method thereof, aiming to overcome the defects that a traditional electromagnetic current transformer is easily subjected to electromagnetic interference and has complicated insulation structure, magnetic saturation existence and the like. The technical scheme of the invention comprises the following steps of: demodulating light output by a light source into X-axis polarized light and Y-axis polarized light by a Y-branch integrated optical phase modulator; converting into sinistral circular polarized light and dextral circular polarized light in a lambda/4 retarder; generating a magnetic field by a current in a lead due to the faraday effect; returning the two beams carrying faraday effect phase information to the Y-branch integrated optical phase modulator to intervene when beams in optical fiber is transmitted around the lead; and enabling an interference result to enter a subsequent treatment system from the optical fiber coupler to acquire the faraday effect phase information at the measuring point. The invention avoids the hidden danger of ferromagnetic resonance and magnetic saturation by adopting the optical fiber as a sensing medium and has a series of advantages of high detection accuracy, good environmental suitability, and the like.

The invention relates to high-strength Mg-Y-Ni-Mn alloy and a manufacturing method thereof. The high-strength Mg-Y-Ni-Mn alloy comprises 5.0-12.5% of Y, 2.0-6.0% of Ni, 0.4-1.0% of Mn and the balance magnesium and inevitable impurities. The alloy is manufactured through the following process of material preparing, vacuum melting ingot casting, cyclic homogenizing annealing, extruding and double aging. Materials do not need to be refined; the extrusion ratio is low (lambda=11); the limitations that the manufacturing process of high-performance magnesium alloy is complex and the manufacturing conditions are rigorous are broken; the process is simple; transportability is high; operation is easy, the room temperature tensile strength and the yield strength of the alloy are obviously improved; the high-performance magnesium alloy can be directly produced under existing industrial conditions; the problem that the application of the Mg alloy is limited due to the poor mechanical performance of the Mg alloy is solved; and the application range of the magnesium alloy is expanded.

The invention discloses an evaluation method for academic capability of a scientific research team. The evaluation method comprises the following steps: obtaining a paper pool for evaluating academiccapability; cleaning all data in the paper pool; calculating a journal impact factor standard value IFNOR=IFV/lambda; constructing author's adjacency matrix, paper and paper reference journal matrix;According to the author's adjacency matrix, making the collaborator network diagram, detecting the scientific research team by clustering resolution coefficient, making the net file for each scientific research team, and determining the composition of its members and the cooperation relationship among its members; constructing scientific research team and paper matrix; RFV _ d = sigma IFNOR; RFV _t = sigma RFV _ d, as a team academic index, RFV_t being used to evaluate the academic ability of a team. This application can evaluate the academic ability of scientific research team at the beginning of publication, and the evaluation result is scientific and effective.

The invention discloses a positioning antenna, a positioning antenna assembly, a road side unit, and a DSRC application system. The positioning antenna comprises at least three receiving antennas, wherein equivalent phase centers of the receiving antennas are all on a same straight line, distances exist between the equivalent phase centers of the receiving antennas, at least one of the distances d12 is less than lambda, and at least one of the distances d13 is greater than N lambda. According to the positioning antenna of the invention, microwave signals from an OBU can be received by adopting at least receiving antennas which are arranged according to a certain distance, so a RSU can be conveniently used to calculate an azimuth angle corresponding to the microwave signals transmitted by the OBU through a phase difference method after the microwave signals are processed correspondingly by the RSU, and accurate positioning information of the OBU can be calculated according to the azimuth angle to determine whether the OBU is located in an antenna coverage region of the RSU, so that adjacent channel interference and vehicle following interference problems can be effectively solved.