34results about How to "Wide range of research" patented technology

The invention provides a six-unit tile-shaped plug nozzle cold flow test device, which comprises a plug cone, a six-unit inner nozzle plug nozzle assembly, a plug block, combustion chamber assemblies and a measuring assembly, wherein the plug block and unit inner nozzles have the same appearance and size, the molded surface structures of the left side and the right side of the plug cone are symmetrical, the molded surfaces are integrally processed, a row of round holes are processed at each side and are used for assembling the unit inner nozzles, all outlets of the assembled unit inner nozzles are in lap joint with the tile-shaped curved surface of the plug cone, the opening parts of the three unit inner nozzles positioned at the same side of the plug cone are provided with the combustion chamber assembly. In the test process, the unit inner nozzle is replaced into the plug block according to test requirements. The invention provides the compression ratio straight-line tile-shaped plug nozzle cold flow test device with multifunction, simple structure and lower cost, different test requirements are met, the height compensation characteristic of the plug nozzle and the influence of relevant structure factors on the height compensation characteristic can be studied, and the like.

The invention discloses a system and method for adjusting the thickness of the ice layer and performing a collapse test. The system part includes a thermal insulation and airtight laboratory. A concrete water tank with an open top is arranged in the heat preservation and airtight laboratory. The outer wall of the concrete water storage tank is covered Wrapped with a thermal insulation layer, the thermal insulation and airtight laboratory is also equipped with a cooling device for cooling the upper water of the concrete reservoir and a temperature regulating device for regulating the temperature of the lower water of the concrete reservoir; in addition, the invention also discloses Corresponding methods for adjusting the thickness of the ice layer and carrying out the avalanche test; the present invention realizes the adjustment of the thickness of the ice layer and the avalanche test, and simulates the freezing and melting process of the reservoir area in cold regions of my country in the laboratory. Scientific research provides technical support.

The invention discloses a method for improving content of amylose in rice by using RNA interference in the technical field of biology. The method comprises: cloning a Q enzyme RBE3 genetic fragment frThe invention discloses a method for improving content of amylose in rice by using RNA interference in the technical field of biology. The method comprises: cloning a Q enzyme RBE3 genetic fragment from the rice as an RNA interference fragment; starting an expression by using an endosperm specific promoter; constructing a siRNA expression vector of RBE3 gene; and obtaining transgenic rice interferom the rice as an RNA interference fragment; starting an expression by using an endosperm specific promoter; constructing a siRNA expression vector of RBE3 gene; and obtaining transgenic rice interfering the RBE3 gene by using a method of Agrobacterium-mediated transformation. RT-PCR and Southern are hybridized to check the integration and expression conditions of a target gene; an iodine developming the RBE3 gene by using a method of Agrobacterium-mediated transformation. RT-PCR and Southern are hybridized to check the integration and expression conditions of a target gene; an iodine development process for measuring the content of endosperm amylose of transgenic rice strains shows that the average improvement magnitude of the amylose of the transgenic plants is 140 percent compared withent process for measuring the content of endosperm amylose of transgenic rice strains shows that the average improvement magnitude of the amylose of the transgenic plants is 140 percent compared withnon-transgenic strains, and reaches 238 percent to the maximum; and after screening, the transgenic rice strains of which seed amylose is remarkably improved are obtained. The method for improving thenon-transgenic strains, and reaches 238 percent to the maximum; and after screening, the transgenic rice strains of which seed amylose is remarkably improved are obtained. The method for improving the content of the amylose in the rice lays a foundation for producing the amylose on a large scale by using the transgenic rice.content of the amylose in the rice lays a foundation for producing the amylose on a large scale by using the transgenic rice.

The invention belongs to the field of power systems and discloses an artificial pollution accumulation characteristic testing system and an operating method thereof. The system comprises a wind source power section, a test section and an air duct diffusion and dust removal section which are communicated in sequence; the wind source power section is used for providing natural wind for the test section; the test section is used for simulating the pollution accumulation condition of an insulator of a power grid; the air duct diffusion and dust removal section is used for collecting dust and providing an air duct outlet; and the wind source powder section is provided with a base for supporting the testing system. The testing system is internally provided with a draught fan, a dust spreading device, the insulator and the like, so that the artificial simulation for the natural pollution accumulation conditions of the insulator in typical environments such as wind, rain, fog and the like and different pollution degrees in a laboratory is realized; compared with the traditional method for researching the natural pollution accumulation characteristic through circuit sampling, the operating method is time-saving and labor-saving, safe and reliable as well as wide in research range; and a research result has important significance for the operation maintenance as well as the design and selection of the insulator of a power transmission line.

The invention discloses a flowing reaction device allowing forming and growing of new particles of atmospheric aerosol. The length of the flowing reaction device is about 22 meters. The flowing reaction device comprises four parts of a sample injection region (I), a transition region (II), a nucleation region (III) and a growing region (IV), wherein the sample injection region comprises three sample inlets and a set of water bath heating water inlets and outlets; the transition region comprises a temperature humidity detecting opening, a low-volatility substance sample inlet and a primary sampling opening; the nucleation region comprises a set of water inlets and outlets for controlling temperature of water bath, a plurality of intermediate sampling openings and a temperature humidity detecting opening formed in the upper part of the nucleation region; the growing region comprises a plurality of growing region sampling openings; the change of the particle number concentration and the change of the particle diameter of each sampling opening are detected through scanning an electrical mobility particle diameter spectrometer. The flowing reaction device disclosed by the invention can be used for researching the generative mechanism and the rising characteristic of the new particles in the atmosphere, so that the dynamics of the nucleation of the aerosol is further researched, and the flowing reaction device has the characteristics of being high in precision, good in stability, simple and convenient to operate, and the like.

The invention discloses a large-scale soil sample true triaxial seepage characteristic and strength test device, which comprises a frame, which consists of a test frame base (28) arranged parallel to each other, a rigidity test pressurized platform (23) and a rigid The pressurized reaction force frame beam (22) is composed of, wherein, the described test frame base (28) is connected and fixed by the base column (27) between the rigid test pressurized platform (23), and the described rigid test pressurized platform (23) is connected and fixed with the rigid pressurization reaction frame crossbeam (22) by four rigid pressurization reaction frame columns (21) respectively positioned at its four sides, on the described rigidity test pressurization platform (23) A pressure chamber a is provided. The invention can well study the soil deformation and strength change problems caused by foundation pit excavation and unloading, and is especially suitable for unloading confining pressure test of deep soil.