58results about How to "Applicable to practical application" patented technology

The invention discloses a remediation method of heavy metal contaminated soil. The remediation method comprises the steps of applying humic acid on the surface of the heavy metal contaminated soil, turning and evenly mixing the soil with a thickness of 20-30 cm from the contaminated soil surface layer with the humic acid, reacting for 7-15 days and then pre-burying leaching device under a contaminated area of the heavy metal contaminated soil; leaching the soil by using a citric acid solution and a tea saponin solution in sequence through the leaching device, and recycling leaching liquid of the leaching device and leaching liquid containing heavy metals to process intensively after finishing leaching; then applying fruit residues on the soil surface, turning and evenly mixing the fruit residues with the soil with a thickness of 20-30 cm from the soil surface layer, intercropping sunflowers and brassica juncea, harvesting all the biomasses on the ground after the plants are ripe to process intensively. Due to the adoption of the method, high removal rates of various heavy metal ions in the soil are achieved; the soil is remediated completely; meanwhile, the method is low in cost, good in effect and easy to implement.

The invention provides an annular optical fiber with an asymmetrical optical grating and application in orbital angular momentum generation thereof. A hollow core annular optical fiber can increase the effective refractive index between degeneracy-similar modes, thereby preventing crosstalk between the modes. A long period optical grating inscribed on the upper half ring of the hollow core annular optical fiber breaks a circular symmetry structure of the optical fiber and achieves conversion between angular non-same order modes. When input light is of a circular polarization fundamental mode, a first-order orbital angular momentum mode can be generated. The hollow core of the hollow core annular optical fiber is filled with an optical functional material with the refractive index adjustable and the wave length for generating the orbital angular momentum mode can be tuned by the refractive index of the liquid, so that the structure can generate the orbital angular momentum mode in an adjustable cross band wave length range. Simulation shows that when the optical grating period is 292 [mu]m and the optical grating length is 1.460cm, the range of broad band wave lengths with the angular momentum mode conversion rate higher than 90% can reach 237nm, the greatest conversion rate is 98.91%, and the modulation rate of the refractive index of the filling liquid for the wave lengths for orbital angular momentum mode generation is 400nm / RIU.

The invention relates to a composite structure and a manufacturing method for regulating the luminance of LEDs by a magnetic field. The composite structure is composed of a magnetostrictive material substrate and an LED laminated film material. A unified whole is formed, wherein the LED stacked film materials are polar substrate, buffer layer, n-type conductive layer, strained active region, p-type electron blocking layer and p-type conductive layer in sequence. Under the action of an external magnetic field, the luminous efficiency of the strained active region in the LED laminated film material is regulated through the stress / strain of the magnetostrictive material substrate, thereby realizing the function of continuously adjustable LED luminous brightness. The composite structure proposed by the present invention is novel, and the manufacturing method is simple and easy, which is conducive to the integration of new magnetic-force-electric-optical devices and systems, and will be applied to adjustable light display, magnetic sensing imaging, self-driven sensor network, magnetic electro-optic integrated systems, etc.

The invention proposes a high-sensitivity optical fiber curvature sensing structure with temperature insensitivity. The three-core optical fiber is used as the central sensitive element, and the three cores of the three-core optical fiber are arranged in an equilateral triangle. The broad-spectrum light enters the multimode fiber 9 through the single-mode fiber 3, excites multiple transmission modes, and the transmission mode field becomes larger, and then enters the three-core fiber 10, and the three core modes independently transmit a distance L and then re-enter the multimode fiber 9 , at this time, the light of the three modes interferes, the light signal is modulated, and then continues to propagate forward in the single-mode optical fiber 3 in a single-mode form, and is finally recorded by the spectrum analyzer 2 . The amount of curvature change can be estimated by detecting the shift amount of the interference spectrum. The experimental results show that the optical fiber sensing structure can measure the bending curvature and obtain good linear characteristics, and the measurement sensitivity can reach ‑28.29nm / m‑1 when the curvature range is 2.79 m‑1~3.24 m‑1.