34results about How to "Improve space coverage" patented technology

A system and method for using hyperpolarized noble gases together with an appropriately designed and optimized magnetic resonance imaging pulse sequence to rapidly acquire static or dynamic magnetic resonance images. The strong magnetic resonance signal from hyperpolarized gases, combined with the present magnetic resonance imaging technique, presents the opportunity for the imaging of gases with both high spatial and high temporal resolution. One potential application for such a method is the direct, dynamic visualization of gas flow, which would be extremely useful for characterizing a variety of fluid systems. In the medical field, one such system of substantial importance is the lung. The system and method provides for visualizing regional ventilatory patterns throughout the respiratory cycle with high temporal and high spatial resolution. The low sensitivity to susceptibility artifacts permits good image quality to be obtained in various orientations. Depending on the application, temporal resolution can be traded for anatomical coverage. Such application of dynamic imaging of the lung using hyperpolarized gases will provide unique information on the physiology and pathophysiology of the lung, and has the potential for many clinically-relevant applications.

The invention discloses a compact antenna and a mobile terminal. The compact antenna comprises a predetermined antenna and at least one parasitic unit corresponding to the predetermined antenna, wherein a feed point is arranged in the at least one parasitic unit, and the feed point is used for feeding the corresponding parasitic unit, so that the parasitic unit has an independent antenna function.According to the technical scheme, the parasitic unit in the existing antenna can be reused, so that the parasitic unit has a radio frequency function, the space coverage rate is improved, and the antenna size is reduced.

The invention discloses a method and a system used for providing the dynamic traffic information service and belongs to the intelligent transportation field. The system comprises a wireless gateway, a real-time traffic information database, a global position system (GPS) receiving module, a floating car data (FCD) processing module, a traffic information partial update module, a traffic information issuing module and a traffic information inquiry module. The method comprises the steps of receiving GPS information uploaded by a vehicle terminal, completing update of real-time traffic information, and sending real-time traffic information of road sections relevant to the position of a vehicle to the vehicle terminal according to the GPS information. According to the method and the system used for providing the dynamic traffic information service, a data exchanging channel between the vehicle terminal and the traffic information is built, the GPS information of the vehicle can be used for the real-time update of the traffic information, the traffic information serves the vehicle traveling on the road, and therefore good interaction between the vehicle and the road is achieved.

The invention discloses a variable-configuration dual-navigation long-range marine unmanned vehicle driven by a natural environment fluid, which has a surface navigation mode, a navigation switching mode and an underwater navigation mode, and includes: a wind energy collection unit that receives wind applied by ocean wind. The aerodynamic force drives the aircraft to sail; the buoyancy adjustment unit adjusts the buoyancy of the aircraft itself in the underwater navigation mode, and combines the hydrodynamic force exerted by the head-on water flow when the aircraft moves to realize the heave movement and horizontal travel of the aircraft; wing keel; linkage The unit is used to complete the pose change of the sail and the wing keel during the navigation switching mode; the photovoltaic power generation unit is used to collect solar energy and provide power supply for the aircraft's power consumption devices during the surface navigation mode. The variable-configuration dual-navigation state long-range marine unmanned vehicle driven by the natural environment fluid provided by the present invention utilizes the sea surface wind and air flow, underwater water flow and sunlight in the natural environment to achieve energy self-sufficiency. It is capable of long-distance navigation in all navigation states.

The invention discloses a gas-liquid distribution plate for an upflow reactor, comprising a plate, a plurality of distribution holes are uniformly distributed on the plate, and a gas-liquid distributor is installed on each distribution hole, wherein the The gas-liquid distributor includes a catalytic material net and a support. The catalytic material net is above the plate, and the support is below the plate. The bottom of the catalytic material net and the top of the support are respectively fixed in the distribution holes of the plate by bolts. The catalytic material net The bottom communicates with the top of the support body, wherein the catalytic material network is made of catalytically active material in hydrogenation reaction. The gas-liquid distribution plate is simple in structure, easy to operate, large in operation flexibility and good in distribution effect, and can meet the needs of reactor flow distribution and long-term stable operation.

The invention provides a multi-beam antenna based on a one-dimensional microwave planar lens and a double-tapered-slot antenna array. The multi-beam antenna is formed by a double-tapered-slot antennaarray (1) and a one-dimensional microwave planar lens (2). The one-dimensional microwave planar lens is formed by four layers of artificial electromagnetic material surfaces (3) where patterns servingas phase shift units (8) are printed, and fixed columns (4). The double-tapered-slot antenna array (1) is formed by double-tapered-slot antenna units (9) and is fixed on an organic glass backboard (7). The antennae are fed by substrate integrated waveguides (6), and can be integrated and connected with other microwave circuits. The one-dimensional microwave planar lens (2) is connected with the organic glass backboard (7) through long nylon support columns (5). The radiation phase center line of the double-tapered-slot antenna array (1) coincides with the focal line of the one-dimensional microwave planar lens (2), and an optimal focusing effect is reached. According to the invention, a high-gain wide-angle spatial scanning function can be achieved, the multi-beam antenna is high in integrated level, simple to manufacture and low in cost.

The invention relates to an MODIS AOD product missing data restoration technology. The technology comprises the following steps of 1, performing preprocessing for remote sensing data of geometric correction, re-projection and the like of MODIS AOD data; 2, verifying the applicability of different levels of DT\DB AOD data; 3, on the basis of increasing spatial coverage degrees of two algorithm products through linear regression equations of DT and DB AOD respectively, performing AERONET precision weighted fusion; 4, further fusing data of two satellites Terra and Aqua by adopting linear regression; and 5, preliminarily restoring residual missing AOD data by adopting a space-time Kriging interpolation method. By utilizing obtained residual errors, a geographically weighted regression model is adopted for further correction, and finally a completely restored AOD data result is obtained. The technology has the beneficial effects that the spatial coverage rate of the AOD data is gradually increased on the premise of guaranteeing AOD data precision, the missing data is completely restored finally, and reliable support is provided for subsequent application.