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320 results about "Impact area" patented technology

Method for determining traffic incident impact areas and durations on basis of coil detection

The invention relates to a method for determining traffic incident impact areas and durations on the basis of coil detection. The method includes enabling coils to acquire traffic flow and spot average speed data at preset intervals when traffic incidents occur, and updating queuing lengths of road sections; updating queuing lengths of various access roads when the queuing lengths of the road sections are larger than the distances from traffic incident occurrence spots to intersections; updating dissipation lengths of the road sections and the queuing lengths of the various access roads when the traffic incidents are completed; updating dissipation lengths and the queuing lengths of the various access roads when the dissipation lengths of the road sections are larger than the distances from the traffic incident occurrence spots to the intersections; determining that the traffic incidents are completely finished when the dissipation lengths of the various access roads are larger than the corresponding queuing lengths, and determining the incident impact areas and the durations. Compared with the prior art, the method has the advantages that development of the traffic incidents is observed in real time by the aid of the coils, accordingly, the traffic incident impact areas and the impact durations can be accurately estimated, and a decision basis can be provided for traffic control and management.
Owner:TONGJI UNIV

Surface strengthening method for metal component by vibration-assisted laser shock treatment

The invention relates to the field of new techniques of laser processing and vibration aging, in particular to a surface strengthening method for a metal component by vibration-assisted laser shock treatment. According to the method, by combining laser shock strengthening technology with vibration aging treatment, a vibration exciter is used to excite vibration, a sensor picks up vibration, the vibration frequency is controlled to keep the amplitude value within a specified range, laser lap impact strengthening treatment is carried out with the aid of vibration aging treatment so that more serious plastic deformation can be generated on the surface of the metal component, and high-amplitude residual compressive stress is induced in an impact area; meanwhile under the condition that laser beam irradiates the metal surface, vibration further refines or even nanocrystallizes the surface grain, and under the action of the temperature field, vibration reduces the thermal stress field gradient, and thus the residual stress inside the material is uniformized; and the mechanical properties of the metal component are remarkably improved, and the metal surface is strengthened, so that the fatigue life of the metal component is prolonged effectively, and initiation and expansion of fatigue cracks are prevented.
Owner:JIANGSU UNIV

Method for preventing electric precipitation explosion venting during blowing igniting of semi-steel steelmaking

ActiveCN103555880AAvoid explosive limitReduce missed gun accidentsManufacturing convertersSteelmakingEvaporative cooler
The invention provides a method for preventing electric precipitation explosion venting during blowing igniting of semi-steel steelmaking, and belongs to the technical field of converter steelmaking methods. According to the technical scheme, the mixed gas of oxygen and nitrogen is used for igniting and blowing in the blowing stage, instead of single oxygen; the total amount of the mixed gas is the amount of the oxygen supplied for normal blowing, wherein the flow rate of oxygen is 50 to 60% of the amount of oxygen supplied for normal blowing; the gas supply pressure required by normal blowing is provided to a smelting pool; the jet impact area and penetration depth are improved; the igniting time is reduced; if the raise of the temperature of an inlet of an evaporative cooler is beyond 4 DEG C, the flow rate of oxygen can be gradually raised, and simultaneously the flow rate of nitrogen can be reduced; the nitrogen is stopped after the flow rate of oxygen is raised to reach the normal oxygen supply; and the contents of CO and O2 in smoke are controlled to be beyond the explosion venting range. According to the method, the problem which enables the enterprise to be bothered for a long time that electric precipitation explosion venting occurs during blowing igniting of converter semi-steel steelmaking can be solved in a simple way; the potential risk is removed; the production can be carried out smoothly; a great contribution is brought for the safe and efficient production of semi-steel steelmaking.
Owner:HEBEI IRON AND STEEL

Centrifugal separation apparatus and method of using the same

Centrifugation separations apparatus including centrifugation means having an inlet, a liquids discharge and a solids discharge, a deflector operatively associated with the solids discharge, wherein the solids discharge is adapted to operatively discharge solids being discharged from the centrifugation means at a trajectory and the deflector is adapted to interrupt the trajectory to decelerate and change the direction of travel of the solids, or wherein the deflector is operatively associated with the solids discharge and cooperable with solids being discharged from the solids discharge whereby buildup of solids on the deflector is substantially prevented, or wherein the solids discharge includes a lip configuration which causes the trajectories of the discharging crystals to be relatively independent of their size and/or their residual syrup/moisture content, or including support means, such as a spider like construction having one or more webs substantially parallel to the angular motion of the solids being discharged from the solids discharge, operatively supporting the centrifugation means whereby the impact area for solids discharged from the solids discharge may be minimized, or including blending means operatively associated with the solids discharge for blending solids discharged from the centrifugation separations apparatus.
Owner:STG FCB HLDG

Construction method used after tunnel integral type collapse

ActiveCN107165652AStable supportAvoid the disadvantages of inoperabilityUnderground chambersTunnel liningStructural engineeringImpact area
The invention provides a construction method used for tunnel integral type collapse. A collapsed tunnel is divided into two sections in the tunneling direction, the first section is an impacting area, and the second section is a collapsing area; a first support is complete in the impacting area, only a tunnel face collapsing part is subjected to treatment, and tunnel surrounding rocks are not subjected to treatment; and part of a first support in the collapsing area is damaged, and tunnel surrounding rocks and a tunnel face collapsing part are both subjected to treatment. Compared with the prior art, the construction method used for tunnel integral type collapse has the beneficial effects that (1) advanced small guiding pipes at the top of a tunnel and I-shaped steel arching frames are ingeniously combined, so that the advanced small guiding pipes form a structure similar to a pipe shed, and the supporting capacity is strengthened; and (2) collapsing part small guiding pipes are densely hit on tunnel faces to enable the tunnel face collapsing parts to be concreted, the collapsing part small guiding pipes and surrounding rock soil form a stone body, and thus the capacity of resisting the tunnel top collapsing load and impacting load is strengthened.
Owner:DATANG LINZHOU THERMAL POWER CO LTD
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