6results about How to "Reduced strength" patented technology

This invention discloses a high-crack-resistant cement-fly ash stabilized base course material, belonging to the field of road engineering technology. The material comprises the following components by mass percentage: 2.0-3.0% cement, 16-20% fly ash, and the balance being stabilized aggregate. The cement is an external admixture, the fly ash is an internal admixture, and the gradation of the stabilized aggregate conforms to the specifications of CF-A-2L or CF-A-2S in JTG / T F20-2015. This invention, by adopting a "low cement, high fly ash" mix design, controls the 7-day unconfined compressive strength within a reasonable range of 3.5-4.5 MPa, effectively avoiding the problem of regular transverse cracks in the base course caused by excessively high early strength. Simultaneously, the high fly ash content ensures the continuous growth of the material's later strength, with its 21-day unconfined compressive strength remaining stable above 6 MPa. Its overall performance is superior to the mix ratios recommended by current standards. This invention is particularly suitable for highway base course construction in arid regions with large temperature differences, such as Xinjiang.

In some embodiments, the display device includes an anti-reflective pattern or columnar spacer disposed between the light-emitting diode and the diaphragm layer and comprising a blue colorant. Blue light reflected from the anti-reflective pattern or columnar spacer is almost imperceptible. Image quality can be improved by preventing rainbow spots (or blotches) caused by reflections of external light. Since blue light emitted from the light-emitting diode can pass through the anti-reflective pattern and / or columnar spacer, the light intensity emitted from the light-emitting diode can be increased.

The application is suitable for the technical field of agricultural monitoring, and particularly relates to a smart agricultural monitoring method and system.The method comprises the following steps: delimiting a target area requiring disease and pest monitoring, and dividing the target area into a plurality of sections, selecting monitoring points, irradiating the sections by using light source devices previously arranged at the monitoring points, and clustering the light source devices into a fixed group and an adjustable group; starting the light source devices of the fixed group, collecting spectral reflectance data at each monitoring point, wherein each wave band corresponds to a reflectance, drawing a plurality of spectral curves, and identifying the change trend of each spectral curve.The application can adjust the irradiation angle, optimize the light coverage, reduce the monitoring dead angle, meet the monitoring requirements of different leaf orientations and plant structures, greatly improve the monitoring accuracy, and improve the disease and pest control efficiency and intelligent level of crops.

The application discloses a gel microsphere profile control agent with salt response characteristics and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing an anionic monomer, a cationic monomer, acrylamide, persulfate, sodium dodecyl sulfate and deionized water, and adjusting to neutral to obtain a first mixed solution; adding oil-soluble methyl beta-acryloyloxy octadecyl propionate into the first mixed solution, stirring to a transparent and uniform state to obtain a second mixed solution; dispersing the second mixed solution into a plurality of microdroplets by using a microfluidic technology, and solidifying the microdroplets by a polymerization reaction to form a plurality of microspheres. The application utilizes the strong anti-polyelectrolyte phenomenon of zwitterions to polymers in salt water, the association of hydrophobic groups and the ionic bond action between anions and cations, realizes real-time regulation and control of the performance of the gel microspheres, improves the stability of the gel microspheres in a long-term migration and plugging process, and greatly improves the water injection development effect of a heterogeneous oil reservoir.

The utility model relates to the technical field of optical fiber laser, specifically relates to a kind of based on phase continuous sweep frequency optical fiber laser, including shell, the inside one side of shell is fixedly installed with the multimode pump transmitter for emitting laser source, the output end of multimode pump transmitter is provided with phase modulator, the other end of phase modulator is provided with first fiber grating, the one side of first fiber grating away from phase modulator is connected with optical fiber body, the other end of optical fiber body is fixedly connected with second fiber grating, the other side of second fiber grating is fixedly connected with the multimode pump coupler of emission gain rear laser.Compared with prior art, the utility model, by being provided with first fiber grating and second fiber grating cooperate optical resonant cavity, and in optical resonant cavity outer wrapping heat pipe, the frequency of stable optical resonant cavity is ensured the stability of laser output frequency, and optical path length drift caused by heat effect can be reduced.