193results about How to "Reduce flooding" patented technology

The invention discloses a method and device for forwarding messages. An ARP request message sent by a first VM is received by a first VTEP, a mapping request message is sent to a second VTEP through a mapping system, and a mapping relationship between an EID and an RLOC of a second VM under the second VTEP is requested; a mapping response message returned by the second VTEP is received by the first VTEP and the mapping relationship between the EID and the RLOC of the second VM is learned, wherein the EID is an MAC address, an IP address and a VNI of the second VM; the RLOC is an IP address of the second VTEP; the messages sent to the second VM by the first VM are received by the first VTEP, according to the stored mapping relationship between the EID and the RLOC of the second VM, VXLAN packaging is conducted on the messages, and the packaged messages are sent to the second VTEP and forwarded to the second VM through the second VTEP. The function that a VXLAN is operated efficiently under the condition that multicast is avoided is achieved.

A system for providing a tree topology for a network having an interior gateway protocol. A first router receives a hello message from all connected routers in the network. The hello messages include tree topology information. The first router then uses the tree topology information to determine a parent of the router. The first router then establishes connections with directly connected routers at the same level in the tree topology. The first router also generates link messages that include all of the prefixes for children of the first router and broadcasts the link messages.

The invention discloses a special amino acid fertilizer-water paste for aquiculture and a preparation method thereof. The special amino acid fertilizer-water paste for aquiculture is prepared from the following raw materials in certain proportion: an amino acid solution, microelements, fermentation organic substances, inorganic fertilizers, minerals, a water quality improver, beneficial bacteria and a thickening agent. The preparation method comprises the following steps: A. production of amino acid solution namely, a. hydrolyzing; b. neutralizing; c. filtering; d. concentrating; B. production of fermentation organic substances: a. mixing: evenly mixing organic raw materials with the amino acid solution; b. inoculation: evenly mixing the organic raw materials with beneficial bacteria; c. fermentation; and C. production of amino acid fertilizer-water paste: a. chelation: heating the amino acid solution, adding microelements while stirring to perform chelation; b. mixing: sequentially adding the fermentation organic substances, inorganic fertilizer, minerals, water quality improver and beneficial bacteria, and evenly mixing; c. thickening: adding a thickening agent, and evenly mixing; d. inspection. The invention enhances the immunity of fish, reduces the occurrence of diseases, increases the culture yield of bighead, lowers the fish culture cost, and improves the fish quality.

The invention discloses a self-humidification membrane electrode for a proton exchange membrane fuel cell and a preparation method thereof. The preparation method comprises the following steps of 1, pre-treating a proton exchange membrane, 2, mixing a carbon-supported platinum or platinum-ruthenium catalyst, a perfluorinated sulfonic acid resin, a hydrophilic organic polymer and an inorganic oxide and in water or a low-boiling point solvent, carrying out ultrasonic treatment to obtain catalyst slurry, and carrying out spray-coating of the catalyst slurry on one side of the proton exchange membrane by an illumination direct-coating technology to obtain an anode catalyst layer, 3, carrying out spray-coating of slurry without the hydrophilic organic polymer and the inorganic oxide on the other side of the proton exchange membrane to obtain a cathode catalyst layer, and 4, carrying out lamination of a gas diffusion layer and the proton exchange membrane of which the two sides are coated with the catalyst layers to obtain the self-humidification membrane electrode. The anode catalyst layer contains the hydrophilic organic polymer and the inorganic oxide so that the self-humidification membrane electrode has excellent self-humidification performances at a high cell temperature and low humidity.

The invention discloses amino acid fertilizer water slurry special for aquaculture and a preparation method of the amino acid fertilizer water slurry. The amino acid fertilizer water slurry consists of amino acid solution, microelements, fermentation organic matters, inorganic fertilizer, mineral matters, a water quality modifier and beneficial bacteria according to a certain proportion. The preparation method comprises the following steps of: A, producing the amino acid solution, i.e., a, hydrolyzing, b, neutralizing, c, filtering and d, concentrating; B, producing the fermentation organic matters, i.e., a, stirring, uniformly stirring organic matter raw materials with the amino acid solution, b, inoculating, uniformly stirring the organic matter raw materials with the beneficial bacteria, and c, fermenting; and C, producing the amino acid fertilizer water slurry, i.e., a, chelating, heating the amino acid solution, and adding the microelements under stirring for chelating, b, mixing, adding the fermentation organic matters, the inorganic fertilizer, the mineral matters, the water quality modifier and the beneficial bacteria in sequence and uniformly stirring and mixing, c, checking according to related quality standard, and d, packaging. According to the amino acid fertilizer water slurry, the immunity of fishes is improved, diseases are reduced, the breeding yield of spotted sliver carp is increased, the fish breeding cost is reduced, and the fish quality is improved.

The invention discloses a GNSS multipath effect suppression method based on EMD iteration threshold value smoothing. EMD is performed on measuring errors to obtain N intrinsic mode function components, multipath errors are often concentrated in a high-order IMF and a remainder item, on one hand, singular spectrum analysis is used for performing noise estimation on N IMFs after EMD, and according to estimation results, first M IMFs are selected for noise auxiliary data analysis, so that EMD results of the measuring errors are obtained; on the other hand, the mode that first IMF data are sampled randomly is adopted, multiple sequences which are the same as an original signal in signal-to-noise ratio are constructed, mode unit threshold value smoothing is adopted for removing noise of the sequences, multiple results after noise removal are averaged to obtain the GNSS multipath errors through separation, and the GNSS multipath errors are used for compensating GNSS measuring results to achieve multipath effect suppression in the measuring process. According to the GNSS multipath effect suppression method, EMD precision is improved, and influences of noise are reduced.

A solid, dimensionally stable wick including a porous portion having capillary passages for drawing a liquid from a lower end to an upper end, and a substantially non-porous portion that has not more than about five percent by volume porosity. The wick is particularly useful in supplying fluid to an atomization device from a reservoir.

The invention provides a data processing method and apparatus. The method comprises the following steps: when a first VTEP device receives flow forwarded by a neighbor VTEP device and an ARP table entry corresponding to a destination IP address of the flow is not queried, carrying out ARP request message flooding on the destination IP address in the station; and if the first VTEP device does not receive an ARP response message of the destination IP address within a first preset time, sending an ARP flooding indication message to a destination neighbor VTEP device, so that the destination neighbor VTEP device carries out the ARP request message flooding on the destination IP address in the station, wherein the ARP flooding indication message carries the destination IP address, and after the ARP response message of the destination IP address is received, the destination neighbor VTEP device synchronizes the ARP table entry corresponding to the ARP response message to the neighbor VTEP device. By adopting the data processing method and apparatus provided by the embodiment of the invention, the ARP message flooding in an IP backbone network can be reduced.

An ad hoc wireless communications network includes wireless nodes arranged in a backbone net and stub nets coupled to the backbone net via respective wireless nodes defining gateway nodes. A method for the network includes transmitting node role information from each gateway node to respective wireless nodes within each stub net. The node role information includes node reactive routing directions for establishing a route outside of a given stub net. A route request is unicast transmitted from a first wireless node in a respective first stub net to a respective first gateway node based upon the node role information. The route request is a request to communicate to a second wireless node in a respective second stub net. The route request is transmitted from the first gateway node across the backbone net to the second gateway node of the second stub net.

Disclosed is a fuel cell with enhanced mass transfer characteristics in which a highly hydrophobic porous medium, which is prepared by forming a micro-nano dual structure in which nanometer-scale protrusions with a high aspect ratio are formed on the surface of a porous medium with a micrometer-scale roughness by plasma etching and then by depositing a hydrophobic thin film thereon, is used as a gas diffusion layer, thereby increasing hydrophobicity due to the micro-nano dual structure and the hydrophobic thin film. When this highly hydrophobic porous medium is used as a gas diffusion layer for a fuel cell, it is possible to reduce water flooding by efficiently discharging water produced by an electrochemical reaction of the fuel cell and to improve the performance of the fuel cell by facilitating the supply of reactant gases such as hydrogen and air (oxygen) to a membrane-electrode assembly (MEA).

The invention discloses a domain-division-based blockchain transaction processing method and network. The blockchain transaction network comprises a plurality of root nodes allocated in advance in thenetwork; and a plurality of domain nodes are arranged under jurisdiction of each root node. When a block node is started, the corresponding root node is inquired, the root node returns domain node information of a to-be-joined domain to the block node based on network information of the block node, and the block node joins in the domain based on the state of the information returned by the node;after the block is generated in the domain, the block needs to be sent to the root node, the block is linked by a sub link in the domain after consensus reaching between root nodes, and the root nodewrites the block information in a main link; and after the consensus of the block by the root node, the block information is broadcasted in the whole network, other domains receive the block and thenonly need to update account book information instead of writing the information into the sub link in the domains. Therefore, a problem of low internal communication efficiency of the fragments of theblockchain fragmentation processing is solved; the network flooding is reduced; and the processing performance of the entire blockchain transaction is enhanced substantially.

The invention relates to a network shooting range soft and hard combination model construction method under cloud architecture, and relates to the technical field of information safety. According to the invention, the VXLAN subnet is constructed based on the OpenStack cloud platform, and the virtual device network and the physical device network are isolated from each other. By establishing the central network node, the physical equipment and the virtual equipment carry out information interaction through the central network node by virtue of a software-defined network technology, so that soft and hard combination is realized, the network shooting range can efficiently carry out data communication with external physical equipment, and the practicability of the network shooting range is improved. According to the method, the expansion of a two-layer network is realized in a three-layer network by virtue of a VXLAN technology, a subnet is established based on the VXLAN, and data flooding between an external network and an internal network is effectively isolated, so that the network flow flooding is reduced, and the network transmission efficiency and the safety of a network shooting range are improved.

The invention provides a method and device for allowing a public network to support a data multicast distribution tree. The method includes the steps of building a Data-Group resource pool database which comprises Data-Group fields and relevant private network fields, judging whether private network multicast information carried by a switching request exists in the Data-Group resource pool database if the switching request launched by PE is received, if the answer is negative, allocating an unoccupied Data-Group to the PE from the Data-Group resource pool database and updating the private network multicast information carried by the switching request to the relevant private network field corresponding to the allocated Data-Group, and if the answer is yes, reusing the Data-Group corresponding to the private network multicast information carried by the switching request. According to the method and device, when two-way PIM is operated in the public network and the private network, the public network supports efficient Data-MDT by means of monitoring of an SDN controller for network equipment, and unnecessary flooding of public network multicast flow is reduced.

The invention relates to an ecological draining and irrigating canal of a farmland. The ecological draining and irrigating canal of the farmland comprises an earthy canal and a water running system, wherein the surface layer of the earthy canal is an ecological layer which is formed by mixing earth with crop straws, local shrub and herbaceous plant straws and grass seeds and then compacting; the water running system comprises at least two construction pipelines which are vertical to the extending direction of the earthy canal, and the construction pipelines are pairwise oppositely arranged; one end of each construction pipeline exposes from an inner trough of the earthy canal, and the other end of each construction pipe is embedded into the earthy canal to be connected with the farmland; water valves are arranged at two ends of the construction pipelines; water outlets in two ends of the construction pipes are wrapped with filtering parts. According to the ecological draining and irrigating canal of the farmland, the purposes of adjusting the water balance of the farmland, transferring and storing rainwater and water drained from the farmland to achieve recycling, controlling nitrogen and phosphorus non-point source pollution of water drained in farmland irrigating, and increasing the biodiversity of an ecological system of the farmland can be achieved.

The invention discloses a wireless network routing method based on a directive antenna. The wireless network routing method based on the directive antenna comprises the following steps of: eliminating a path-diffused loop by introducing a node level configuration, and ensuring that a path request message is quickly diffused to a target node; planning an optimal path decision by the target node in a process of reverse feedback replied by the path so as to prevent directional delay caused by path request feedback of each link under the condition that a source node makes a decision; and timely and effectively establishing communication link through a communication azimuth angle with a next jumping node recorded by a middle node when the path requests a replay and backward feedback so as to reduce sweep delay introduced by the directional communication of the node. According to the invention, requirements of an on-demand communication service of the source node on QoS (Quality of Service) of the link are fully considered, and a level concept into the node in a process of establishing a route is introduced; and in addition, by a distributive processing method, a self-adaptive distributive QoS route is finally established by quick conditional forwarding of the middle node and an optimal decision of the target node.

The present invention provides a membrane electrode assembly for a polymer electrolyte fuel cell, including: an electrolyte membrane; a catalyst layer; and a conductive porous gas diffusion layer, in which an interface between the catalyst layer and the electrolyte membrane is provided with a groove for allowing one of passage and retention of a fluid, and a polymer electrolyte fuel cell employing the membrane electrode assembly. As a result, there is provided at low costs the membrane electrode assembly for a polymer electrolyte fuel cell having improved drainage performance and the polymer electrolyte fuel cell employing the membrane electrode assembly and having stable power generation performance.

The invention discloses an alarm system optimization method based on a bayesian network. The optimization method comprises the following steps: firstly, alarm data is collected, and the alarm data comprises alarm variables and alarm kinds; secondly, pretreatment of the alarm data is carried out, a data set used for bayesian network learning is generated according to states of the alarm variables; thirdly, correlation relations among the alarm variables are monitored from the alarm data learning, and qualitative and quantitative characterization of the correlation relations is carried out by utilization of the bayesian network ; fourthly, the obtained bayesian network is employed to adjust an alarm network, the root reason causing alarm is positioned rapidly and alarm flooding is reduced. The purpose is that an alarm system management method based on the bayesian network is employed to optimize alarm network performances, alarm flooding is reduced as possible, and therefore the method helps people to position the root reason causing alarm rapidly and take steps.

The invention provides a microporous layer structure of a fuel cell. The microporous layer structure comprises a high water-permeable microporous layer and a low water-permeable microporous layer which are arranged in an overlapped manner in sequence; along the direction of an air flow path, the thickness of the high water-permeable microporous layer is increased progressively, the thickness of the low water-permeable microporous layer is decreased progressively, and the total thickness of the microporous layer structure keeps consistent; at an air inlet, the thickness of the high water-permeable microporous layer is greater than that of the low water-permeable microporous layer, and at an air outlet, the thickness of the high water-permeable microporous layer is smaller than that of the low water-permeable microporous layer. The invention also provides a preparation method of the microporous layer structure and an anode assembly of the fuel cell. According to the microporous layer structure of the fuel cell provided by the invention, the water content of a gas inlet area and the water content of a gas outlet area in the fuel cell can be balanced, and finally, the stability of thefuel cell at various temperatures is improved, so that the functions such as durability are improved.

The invention belongs to the technical field of diesel engines, and particularly relates to a multi-injection fuel injection rule measuring device and a measuring method thereof. The multi-injection fuel injection rule measuring device comprises a cylindrical measuring constant volume cavity 1, an orifice plate filter 2, an oil injector mounting bracket 3, a high-pressure oil pipe 13, an oil collecting groove 14, a connecting bolt 16, an oil injector 17 and a data processing and controlling system; the fuel injector 17 is arranged on the top of the cylindrical measuring constant volume cavity1 through the mounting bracket 3, and the oil injector 17 is arranged on the axis of the cylindrical measuring constant volume cavity 1; the high-pressure oil pipe 13 is connected with the oil injector 17; the device is characterized in that the orifice plate filter 2 is arranged inside the cylindrical measuring constant volume cavity 1. According to the multi-injection fuel injection rule measuring method, the fuel injection rate is measured by using a Zeuch volume method, and high-frequency shock wave oscillation in a closed cavity in the high-pressure fuel injection process is weakened by additionally arranging the orifice plate filtering device.

This invention discloses a method and a system for filtering communication information in the communication system, in which, the filter system includes: a background management module used in providing interfaces of input devices, a database used in storing filter conditions and varied information, a front filter module including a matching module and a filter module. Said method includes: presetting a filter condition and its varied information, matching contents of the communication information transmitted currently and filtering it if the content of the communication information matches to the filter condition or its varied form.

A fuel cell cathode comprises a catalyst layer comprised of a catalyst-supported electrically conducive carrier and a polymer electrolyte. The catalyst-supporting electrically conductive carrier further supports or has mixed therein a catalyst that is in contact with an oxygen absorbing/releasing material. The cathode has excellent electrode characteristics with respect to oxygen-reducing reactions. A polymer electrolyte fuel cell fitted with the cathode can provide high battery output.