35results about How to "Reduce the impact of loss" patented technology

The invention discloses a GNSS interference source positioning method based on grid energy traversal search, comprising the following steps: step 1, divide the selected area into several grids; The reverse radiation energy value of each grid point, step 3, use the method of traversal search to radiate the energy of each grid point to another observation point, and calculate the radiation energy value received by the observation point, step 4, each observation point The energy obtained by the actual measurement of the point and the energy obtained by the radiation by the ergodic search method are fitted by least squares, and the grid point with the smallest fitting error is determined as the point where the interference source is located. The method disclosed by the invention can divide the attention area into several grids, the smaller the grid, the higher the accuracy and the larger the calculation amount, and the positioning accuracy can be greatly improved on the basis of the existing RSSI positioning method.

The circuit board assembly and the electronic device provided by the present disclosure relate to the technical field of electronic assembly. The circuit board assembly includes a circuit board, a BGA chip and a high-speed cable. The circuit board has a top surface and a bottom surface, a plurality of first via holes penetrating the top surface and the bottom surface are opened on the circuit board, and the BGA chip is arranged on the top surface. The multiple high-speed signal pads of the BGA chip are respectively connected to one end of the multiple first vias in a one-to-one correspondence. The high-speed cable includes a plurality of connection heads, and the plurality of connection heads are respectively connected to the bottom surface in a one-to-one correspondence with the other ends of the plurality of first via holes. The circuit board assembly can not only improve the signal quality on the link, increase the trace length of the high-speed signal, but also has a simple process and can reduce the cost of circuit board materials and technology.

The invention discloses a method for sending broadcast data, which includes: dividing an original broadcast file to be sent into several file blocks; adding a corresponding forward error correction code to each divided file block, and the former The forward error correction code is used by the broadcast receiving end to perform forward error correction on the broadcast data of the original broadcast file; each file block added with the forward error correction code is divided into N fragments, wherein N is Positive integer and N≧2; Divide the broadcast data of the original broadcast file into N data packets and send them to the broadcast receiver in turn, wherein each data packet is obtained by selecting a fragment from each file block and It is obtained by encapsulating the selected fragments. The invention also discloses a broadcast data sending device, equipment and a computer-readable storage medium. The invention can reduce the impact of network abnormality on the data loss of a single file block, and improve the reliability of broadcast data transmission.

The invention discloses a main grid-free full-back contact solar cell module. The solar cell module comprises a plurality of series back contact small solar cell sheets, the back contact small solar cell sheet is formed after cutting the back contact solar cell sheet, a protruding end of a fine grid of one back contact small solar cell sheet is serially connected with the protruding end of the fine grid with opposite polarity of the adjacent back contact small solar sheet to manufacture a series cell string and then to manufacture the cell module; the cell module avoids the efficiency loss and process complexity caused by the main grid line setting of the full-back contact solar cell and saves the main grid line cost; since a plurality of cell units are cut, the current of each string of cell sheet group string is lowered, thereby reducing the influence of the fine grid line resistance loss; the consumption of the silver paste can be lowered, and the fill factor of the battery and the module are improved at the same time; based on two above points, the cell module can improve the efficiency of the full-back contact battery module, and can lower the process difficulty and manufacturing cost thereof.

The present invention discloses a TE011-lambda / 4-pi mode resonator with a three-dimensional structure. Two output ends of each active circuit are connected with two open-circuit ends corresponding to the lambda / 4 resonator at the junction of a silicon chip layer and a packaging layer; two short-circuit ends of each lambda / 4 resonator are connected with TE011 cylindrical wave guide resonator on a first conducting metal plate, and realize energy coupling with a cylindrical wave guide coupling groove seam by the lambda / 4 resonator of the first conducting metal plate; a rectangular wave guide is assembled above a second conducting metal plate, and the two short-circuit ends of each lambda / 4 resonator realize energy coupling with the cylindrical wave guide coupling groove seam by the rectangular wave guide of the second conducting metal plate, and output energy. The TE011-lambda / 4-Pi mode resonator is suitable for power synthesis of silica-based Terahertz sources at the surface of the packaging layer, a passive circuit is separated from the active circuit, the quality factors of the resonator are higher, scale production can reduce the cost obviously, and the TE011-lambda / 4-Pi mode resonator has application values in the fields of Terahertz personal wireless communication, low-power radars and the like.

The invention provides a double-permanent-magnetic-tube two-end symmetric excitation cylindrical closed magnetic field type electromagnetic vibration table magnetic circuit structure with magnetic field tracking compensation, belonging to the field of vibration measurement technology. A cylindrical closed type magnetic field structure design is provided. Two permanent magnet tubes are symmetrically installed and face magnetic poles. Two symmetric closed magnetic circuits are formed by magnet yokes. The magnetic induction intensity distribution with high uniformity is generated in air gaps. The surfaces of the magnet yokes adjacent to the air gaps are provided with an array type micro structure in the form of deep trenches, and the eddy current loss can be effectively inhibited. A center magnet yoke is provided with a compensation coil, the direction of the current is opposite to that in a working coil, phase tracking is synchronized, amplitudes are proportional, and a formed compensation magnetic field can carry out synchronous tracking compensation on the influence of an armature reaction. According to the double-permanent-magnetic-tube two-end symmetric excitation cylindrical closed magnetic field type electromagnetic vibration table magnetic circuit structure, large stroke, high magnetic field uniformity, high thrust and a linear electromagnetic driving force characteristic can be considered, and a high precision and large stroke electromagnetic vibration table magnetic circuit structure technical scheme is provided for low-frequency / ultra-low frequency vibration calibration.

The invention discloses a device and method for smelting iron by low-grade limonite ore. The device comprises a hot blast furnace, an ore roasting furnace, a lime stone calcining furnace and a blower, wherein the ore roasting furnace and the lime stone calcining furnace are respectively arranged at the left side and the right side of the hot blast furnace; the upper part of the gas burning chamber of the hot blast furnace is connected with the lime stone calcining furnace through a high-temperature flue gas channel; and the top of the hot blast furnace is connected with the ore roasting furnace through a waste heat flue gas channel. In the method, the gas in the gas burning chamber and the air sucked into an air inlet and a furnace charge adding port are mixed and burnt, the generated high-temperature flue gas heats the air in a heated air pipe, and partial high-temperature flue gas is sucked into the lime stone calcining furnace through the high-temperature flue gas channel to calcine the lime stone; and residual waste heat flue gas rises to the top of the hot blast furnace, the temperature of the waste heat flue gas is 750-850 DEG C, and the waste heat flue gas is sucked into the ore roasting furnace through a waste heat flue gas channel to dry and roast the ore. In the invention, the limonite ore which is widely distributed in the natural world and has low smelting value can be used for smelting iron with low cost.

The invention discloses a three-dimensional structure TM010-lambda / 4 millimeter wave resonator based on the silicon technology. Two output ends a, b of two active circuits are connected with two open ends of the corresponding lambda / 4 resonator at the juncture between a silicon substrate layer and an encapsulated layer; two short circuit ends of the lambda / 4 resonator is connected with a cylindrical waveguide resonator on a first electrical conduction metal plate and realizes the energy coupling by a groove joint on the first electrical conduction metal plate; a rectangular waveguide is assembled between the first electrical conduction metal plate and a second electrical conduction metal plate; a rectangular wall of the rectangular waveguide is intersected with the outer wall of the cylindrical waveguide; the intersecting common part is removed so as to realize the energy coupling of the rectangular waveguide and the cylindrical waveguide. The resonator is suitable for being realized on the encapsulated layer based on the silicon technology; the coupling between a passive circuit, a power source and a signal wire on the silicon chip is small; the dissipation influence of the silicon chip is small; and simultaneously the TM010-lambda / 4 millimeter wave resonator obtains the power output which is higher by one order of magnitude than that the traditional lambda / 4 resonator; therefore the TM010-lambda / 4 millimeter wave resonator has the using value in a millimeter wave integrated circuit based on the silicon technology.

The invention relates to a device for separating and extracting a virus in water and a method for extracting sapovirus in water and belongs to the field of extraction of viruses in the water. The invention aims at solving the technical problem that the existing microbiological filter can leak the air easily and provides a method for extracting the sapovirus in the water with high extraction efficiency, less product extraction interference and extracted product applicable to multiple detecting platforms. The device for separating and extracting the virus in the water is characterized in that a storage tank is provided with a dome, an arc-shaped throat is formed in the dome, an edge rolling outside is formed at the bottom of a top cover, the top cover is inserted inside from the arc-shaped throat and is blocked in the arc-shaped throat by virtue of a sealing ring, lugs are symmetrically arranged at the top of the top cover, a lever is respectively arranged in each lug, a water outlet pipe penetrates through the dome to be inserted into the bottom of the storage tank, the air inlet pipe is connected with a nitrogen pressure tank, the water outlet pipe is connected with a filter, and the filter is connected with a filter membrane support. The method for extracting the sapovirus in the water comprises the following steps: filtering a water sample, eluting with a beef extract solution, treating by adopting an isoelectric point sedimentation method and then centrifuging, remelting and carrying out secondary concentration, and then extracting nucleic acid, so that extraction of the sapovirus is completed. The device and method provided by the invention are used for separating and extracting the virus in the water.

The invention is based on the fact that the current output from a DDB controlled amplifier in backoff, i.e. for low amplitudes, is reduced more or less linearly with the amplitude of the signal to be amplified. Therefore, it is enough to use smaller amplifiers which are able to output the necessary RF current. Hence, according to the present invention, the total DDB amplifier is divided into smaller parts that are coupled to the output only when needed.