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1536results about How to "Reduce damage" patented technology

Fabricated concrete column-steel beam energy dissipation type panel point connecting device

The invention discloses a fabricated concrete column-steel beam energy dissipation type panel point connecting device. The fabricated concrete column-steel beam energy dissipation type panel point connecting device is composed of a beam-beam bolt connection component and a friction energy dissipation device, and comprises a prefabricated concrete column, a pre-buried steel beam, a middle steel beam and a combination connection steel piece, wherein transversal surfaces of the pre-buried steel beam and the middle steel beam are both H-shaped, webs of the pre-buried steel beam and the middle steel beam are connected through a web cover plate, and flanges of the pre-buried steel beam and the middle steel beam are connected through a connection cover plate. Earthquake energy is dissipated by using friction plates attached inside a combination steel piece and through a friction energy dissipation mechanism. Compared with the prior art, the connecting device can reduce adverse effects on a floor and achieve a beam hinge yielding mechanism by moving a plastic hinge outward, the energy dissipation device can improve fabricated structure energy dissipation and reduce damages of main structural members, connection parts and the steel beams can be conveniently maintained, replaced and dismantled for reuse, and simultaneously, the fabricated concrete column-steel beam energy dissipation type panel point connecting device is produced by using a whole prefabricated industrialization standard, and installed only through bolts on site, and has strong engineering practicability.
Owner:江苏德丰建设集团建筑科技有限公司

Method for establishing super-male yellow cartfish breeding population by copulating super-male fish with physiology spawner

InactiveCN101390503ASavings in gynogenesisReduce damageClimate change adaptationPisciculture and aquariaCrossover testSuper female
Disclosed is a method for super-male fish to mate physiological spawner to build super-male yellow catfish breeding groups, belonging to the fish physiological genetics; the method belongs to the technical field of controlling the sex of fish through artificial sex reversal, screening, test cross and group expanding. The technical problem to be solved is that issues are the super-male fish mates the sex-reversed physiological spawner; the gynogenesis process is eliminated; through the mating between the sex-reversed physiological spawner and the super-male fish or male fish, and the combination of the sex ratio analysis and the test cross technology, the breeding time is shortened. The invention adopts the following technical proposal: artificial spawning inducement and fertilization; sex reversal, namely, the male fish is sex-reversed into physiological spawner; test cross sex reversal, namely, the physiological spawner and the super-male or ordinary male fish are test-crossed, and the physiological spawner and the super-male fish are selected, and the test cross sex reversal comprises the artificial spawning inducement and fertilization; sex ratio analysis, namely, the sex of the candidate fish is confirmed; offspring determination, screening and identification; group expanding, that is, the breeding groups of the super-male fish and the super-female physiological spawner are expanded; and the breeding production of all-male fish, namely, ordinary spawner mates the super-male fish to produce the all-male fish. The method is used for the breeding and mass production of super-male yellow catfish breeding groups.
Owner:WATER ENG ECOLOGICAL INST CHINESE ACAD OF SCI

Urban internet of things system based on intelligent road lamp

The invention discloses an urban internet of things system based on an intelligent road lamp. The urban internet of things system comprises the intelligent road lamp, a road section controller and a control center, wherein the intelligent road lamp comprises a central control unit, a road lamp driving circuit, a first programmable logic controller (PLC) communication module, a power module, a lighting unit and a sensor; the sensor sends signals which are acquired to a central controller; the central controller processes the signals; the processed signals are sent to the road section controller through the PLC communication module and then sent to the control center; meanwhile, the control center sends a road lamp control signal, the road section controller transmits the road lamp control signal to the PLC communication module, and the PLC communication module sends the road lamp control signal to the central control unit; and the central control unit controls the road lamp driving circuit to drive the road lamp, so that control of the road lamp is accomplished. The urban internet of things system based on the intelligent road lamp has the advantages of low degree of destroy, wide coverage range, low construction cost, high degree of intelligence and the like.
Owner:HUAZHONG UNIV OF SCI & TECH
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