6results about How to "No disturbance" patented technology

The application provides a soil organic carbon estimation method based on a Sentinel-2 image, and steps include sample collection, remote sensing data processing, feature screening, model building, training and testing, and optimal model inversion. The application aims to solve the problems of insufficient precision and interpretability of existing estimation methods, and constructs a high-precision estimation technology system that fuses multispectral data and stacking model algorithms. Only small-scale sample collection is required to train the model, without the need for repeated field sampling and laboratory analysis, which greatly reduces the cost, has small external constraints and is environmentally friendly. The application can efficiently realize large-scale continuous estimation, and the estimation result has high precision and strong stability, which can accurately depict the spatial distribution of carbon content and provide reliable technical support and data guarantee for related work.

The invention provides a soil column device for simulating unsaturated soil solute transport, which comprises a soil column assembly, the soil column assembly comprises a soil column cylinder, and the first end of the soil column cylinder is detachably connected with a soil collection head or a water collection part; the soil collection head is used for collecting soil in a sampling stage of a soil column experiment, and the water collection part is used for collecting percolate in a rainfall simulation stage of the soil column experiment; the two ends of the soil column cylinder are open, a protrusion is arranged at the first end of the soil column cylinder, and external threads are arranged on the outer side of the protrusion. During sampling, the soil column cylinder and the soil collecting head are assembled, and the soil collecting head is used for cutting a soil body to obtain an undisturbed soil column. When rainfall is simulated, the soil collecting head is detached, the water collecting part and the soil column casing are assembled, and the percolate is collected through the water collecting part. After sampling, the soil column cylinder can be directly used for a migration research experiment by replacing the soil collecting head with the water collecting part, and a soil sample does not need to be taken out and refilled into a soil column, so that the integrity of the soil is ensured, and the soil sample is ensured not to be disturbed.

The invention provides a silencer and an aircraft environment control system, and relates to the field of sound absorption and noise reduction of ventilation pipelines, the silencer comprises a silencing main body pipe and a tongue plate assembly, the silencing main body pipe is provided with a main airflow channel, the silencing main body pipe is communicated in a gas pipeline, and the silencing main body pipe is provided with a first silencing structure; the tongue plate assemblies are fixed in the silencing main body pipe, the tongue plate assemblies divide the main airflow channel into two or more silencing cavities, the tongue plate assemblies can divide airflow entering the main airflow channel and guide the airflow into the corresponding silencing cavities for silencing and noise reduction, and each tongue plate assembly is provided with a second silencing structure. The two silencing structures have a synergistic effect, so that the silencer has excellent sound absorption performance in different frequency bands, efficient suppression of broadband noise of an aircraft environment control system is achieved, and the problem that in the prior art, the silencing frequency band is narrow is solved. The lingual plate assemblies divide the airflow and guide the airflow into the corresponding silencing cavities for silencing and noise reduction, and the influence on flow resistance of the system is small.

A high-voltage three-phase bridge gate drive circuit relates to the technical field of high-voltage integrated circuits and comprises a logic input circuit, a narrow pulse generation circuit, a high-side circuit and a low-side circuit. The logic input circuit is provided with three high-side signal output ends and three low-side signal output ends; the narrow pulse generation circuit comprises three narrow pulse branches; the high-side circuit comprises three high-side branches, and the low-side circuit comprises three low-side branches. The method has the characteristics of good channel consistency, high reliability and the like.

The application discloses a kind of detection devices for roadbed soil moisture content, it is related to roadbed soil moisture content detection technical field, including detection equipment and detection mechanism, the detection mechanism includes probe rod, driving structure, small lead screw head, connecting piece, anti-disturbance isolation sheath, axial convex strip and axial sewage tank;The application is used by probe rod, small lead screw head, connecting piece and driving structure cooperation, probe rod is rotated into the position to be detected, anti-disturbance isolation sheath and axial convex strip make probe rod be completely isolated with the hole wall soil in the process of rotation, avoid soil body to be driven, disturbed or compacted, cooperate with the sewage of axial sewage tank and the low-speed drive of worm and worm structure, will not destroy soil body original structure, realize undisturbed high-precision moisture content detection, improve the sewage effect of axial sewage tank by cooperation of inclined cutting block, spiral conveying rod, synchronous belt structure and first transmission structure, reduce the frequency of axial sewage tank blockage.

The invention discloses a deep sea stratified sampling device based on an injector and a vibration sampler, comprising: a main cabin comprising a housing, a frame and a bottom frame; the illumination camera system is arranged on the bottom frame; the sampling system comprises an array type deep sea water body sampling device and a vibration type deep sea sediment sampling device; the positioning system is used for positioning the device; the monitoring system is used for monitoring the accurate position of the device underwater, the acceleration of movement, the speed relative to the water bottom and the parameters of the environment where the device is located; the power supply system is used for providing a power source for the device; and the control cabin is used for controlling the system. The invention also discloses a method for collecting the deep sea layered sample by adopting the device. The device provided by the invention is a sample collection device integrating functions of deep-sea terrain high-definition detection, efficient sediment collection, vertical layered accurate sampling of a water body and synchronous monitoring of key parameters of the water body, and can realize more accurate positioning to different depths for layered sampling.