1304results about How to "Prevent flooding" patented technology

A filtration system is provided which generally includes a filter assembly and a connector assembly coupled to the filter assembly and structured to position the filter assembly in a drain, for example a storm drain. The connector assembly may include adjustable connectors in order to accommodate various flow conditions. The system may further include a diversion element designed to effectively direct an inflow of water into the filter assembly and a removable contaminant removal pillow.

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.

According to an embodiment of the present invention, an apparatus for performing video conferencing is provided that includes an I-frame injector element operable to intercept I-frame requests from one or more end points and to attempt to service the I-frame requests such that at least a portion of the requests are prevented from propagating back to an originating sender. In more specific embodiments, when a receiver endpoint sends a fast video update (FVU) request upstream, it is intercepted by the I-frame injector element and rather than passing the FVU request to the sender the I-frame injector element replaces a next P-frame from the sender with an I-frame, whereby the I-frame is constructed so that when decoded, it matches the P-frame that it replaced. In still more detailed embodiments, the I-frame injector element operates in one of three modes that are associated with bandwidth parameters.

A treatment method for wastewater employing sulfur dioxide and lime chemical dewatering technology in conjunction with an environmental photo biomass/algae biological treatment system growing photo biomass/algae to reduce dissolved solids, heavy metals, and ammonia in the wastewater to produce recovered treated wastewater for vegetation consumption, biofuel feedstock, and biofuel and carbon credits.

A membrane electrode assembly includes an anode, a cathode, and a solid polymer electrolyte membrane interposed between the anode and the cathode. The membrane electrode assembly has a substantially rectangular shape as a whole. Extensions extend outwardly from four corners of the membrane electrode assembly. Each of the extensions has an inclined end to have a substantially triangle shape. The membrane electrode assembly has a substantially rectangular power generation area.

The present invention is a fuel cell power plant that includes a fuel cell having a membrane electrode assembly (MEA), which is disposed between an anode support plate and a cathode support plate, and porous water transport plates adjacent the anode and cathode support plates. The porous water transport plates have interdigitated flow channels for the reactant gas streams to pass therethrough and conventional flow channels for a coolant stream to pass therethrough. The fuel cell power plant also has means for creating a pressure differential between the reactant gas streams and the coolant stream such that the pressure of the reactant gas streams is greater than the coolant stream. Incorporating the interdigitated flow channels into the porous water transport plates and operating the fuel cell at a pressure differential allows the coolant water to saturate the water transport plates thereby forcing the reactant gases into the anode and cathode support plate. This, in turn, increases the mass transfer of such gases into the support plates, thereby increasing the electrical performance of the fuel cell. Current densities of about 1.6 amps per square meter are achieved with air stochiometries of not over 2.50.

The invention relates to a method for increasing the yield of an oil gas well by controlling water pressing crack, in particular to water control pressing crack technology which takes a jelly glue system capable of automatically reducing the viscosity when encountering bottom water as a pressing crack liquid and wax-coated sand as partial supporting agent. At present, when hydraulic pressing construction is performed on low permeating bottom water oil pool, because the stress difference between layers is small or no interlayer forms the stress difference between the layers, the extending of cracks in the vertical direction can be effectively prevented, cracks formed by the hydraulic pressing crack extend and enter a water layer on the bottom in the vertical direction and jump to flow into a shaft along the cracks, and violent flooding of an oil well is generated. When pressing crack construction is carried out, the method adopts a coated supporting agent formed by mixing a thickening agent and a cross-linking agent carrying wax and quartz sand to undergo chemical degradation to coat and block so as to form a blocking layer. The method effectively solves the problems that the prior manual shielding layer cannot effectively prevent the oil well from being flooded by water, and a pressing crack liquid carrying a diversion agent or a temporary plugging agent cannot reduce viscosity basically when encountering the water and has slower settling.

The basic structure of a PTV (programmed temperature vaporizer) injector has been considerably modified so that is can be used for the direct coupling of liquid chromatography in normal phase or reverse phase, and gas chromatography and also for the introduction of high volumes in gas chromatography. The glass tube of the injector is filled with an adsorbent. By means of a system of valves and tubes or capillary tubes, the previously selected fraction of liquid chromatography is transferred to the injector, said fraction coming in through the same extremity for introducing the gas chromatography column. The eluent is entrained by a gas stream through the adsorbent, wherein are retained the solutes, and the solvent is removed through a tube or capillary tube introduced in the injector through the opposite extremity. Thereafter, the solutes are desorbed thermally passing to the chromatography column.

The invention discloses a vehicular ad hoc network routing method based on road side units (RSUs), and belongs to the technical field of traffic intelligence. The vehicular ad hoc network routing method based on the RSUs includes the following steps: step one, the RSUs are placed on a crossroad in a city, all the RSUs are connected to a location server in a wired mode, the RSUs are responsible for collecting geographical location information of vehicles and sending the geographical location information to the location server for recording, and the location server manages all the location information of all the vehicles and traffic condition information of roads; step two, a vehicle A queries a routing path of a vehicle B to the location server, and the location server calculates a routing path for the vehicle A according to a weighted Dijkstra algorithm; and step three, after the vehicle A obtains the routing path, data are sent to the vehicle B through geographical forwarding along the routing path. The RSUs and the location server are utilized for collecting the geographical location information of the vehicles and providing the routing path, routing overhead and transmission delay are greatly reduced, the bandwidth usage efficiency of a vehicular ad hoc network is improved, and data grouping transmissibility is improved.

The invention discloses a method and a device for maintaining an MAC table entry inside a distributed network processing system, which are applicable for the distributed network processing system including an interface board and a plurality of service boards. The method includes the following steps: studying on the MAC table entry is carried out on the service boards according to a message flow forwarded by the interface board; the MAC table entry required to be studied is saved in a first MAC table at the local area and is saved inside a first MAC table of other service boards as well as a second MAC table maintained by the interface board at the same time; aging maintenance is carried out for the second MAC table according to the message flow of the interface board and the corresponding MAC table entry inside the first MAC table is deleted at the same time. The invention also discloses a distributed network processing system. Thereby, data transmission interruption caused by re-studying a MAC address is avoided, the continuity and efficiency of data transmission processing is guaranteed, and problems of data packet loss and flooding caused thereof are avoided.

The invention discloses a protected object-oriented automatic modeling and real-time information joint processing method, which is characterized by comprising the following steps that: 1) in an EMS system, a main station system automatically establishes a secondary equipment model of the system by calling protected substation configuration information; 2) the system establishes a complete secondary equipment relationship model; 3) the system establishes a controlled relationship model between the secondary equipment and a controlled object; 4) the main station system automatically performs information instantiation on protected device configuration classification information; 5) the system automatically establishes a corresponding relationship between a telecontrol protective hard node signal and the protected device configuration information; 6) the system implements warning suppression for the same real-time information forwarded from a telecontrol channel and a protective channel; and 7) a switch trip property is positioned, and whether the switch trip is a real accident trip is judged. The method effectively ensures the accuracy of model maintenance, prevents manual configuration error of the secondary system main station, and improves the level of the automatic system.

A system and method for managing a route cache to reduce the risk of disruption from denial of service attacks. All traffic arriving on a front interface from local (on-link) nodes (e.g., neighbor nodes) can be treated normally. However, for packets arriving from remote (off-link) sources addressed to a given destination IP address, a single, shared route cache entry can be used. The source-address field in this entry can be zeroed-out since it will not be used for traffic coming from any one source. Similarly, for all packets going to off-link destinations through the front-interface, another single shared route cache entry can be created and used. The destination-address field in this entry can be zeroed out since it will not be used for traffic going to any one destination.

The invention discloses a method for screening junk messages and caching the message received in a time interval; by mutually comparing the contents of the messages and taking out the messages which have the same contents or reach a similarity threshold, the messages with different contents are sent; the position information of a terminal device corresponding to the messages with the same contents is obtained; if the position information of the terminal devices corresponding to the messages with the same contents are different, the messages corresponding to the terminal device are sent out; otherwise the invention judges if the amount of the messages corresponding to the terminal device with the same position information reaches a frequency threshold; the messages reaching the frequency threshold and corresponding to the terminal device are deleted; the messages which do not reach the frequency threshold and are corresponding to the terminal device are sent out. The method for screening the junk messages and caching the message received in the time interval overcomes the disadvantages that a 'blacklist' is adopted to prevent and treat the junk message by way of simply limiting a flow, thereby realizing the screening of the junk message, guaranteeing a normal communication in the mode of the message, restraining the junk message, protecting a telecommunication subscriber from being harassed by a large number of junk messages.

A process for reclaiming high concentration ammonia nitrogen waste water by film based absorption wherein a hollow fiber film contactor is employed, the high concentration ammonia nitrogen waste water flows through the tube pass of the contactor, i.e. the lumen of hollow fiber, while the absorption solution H2SO4 flows through shell pass. When applied to treatment for high concentration residual ammonia in coking plant, the invention achieves the effect of one time discharge standard meeting, with the ammonia clearance reaching 99.7% in the water outlet, and the ammonia recovery ratio in the absorbing agent reaching 99.5%.

The present invention discloses a fully soluble aquatic fertilizer and its preparation method and pertains to aquaculture field. The aquatic fertilizer of the present invention comprises monoammonium phosphate 15-45%, sodium humate 12-20%, sodium silicate 5-12%, compound premix 8-13%, and urea 30-40%. The compound premix is mainly composed of trace elements. Firstly, the aquatic fertilizer of the present invention has comprehensive nutrition and balanced formula; secondly, the present invention has high dissolution speed and utilization rate; thirdly, the present invention features simple use method, small use amount, sufficient content, long lasting time and low cost; fourthly, the present invention can not only promote the mass propagation of food organisms of aquatic animals but also specifically cultivate helpful algae, improve water quality, increase dissolved oxygen, effectively avoid pond poisoning, reduce diseases, lower feed coefficient and enhance fish immunity; the present invention is green and environment-friendly, and has stable quality and no harm on human and animal and no pollution on environment.

A tamper switch body is disposed in a housing of a PIR sensor. A tamper opening is formed at a position opposite a switch actuating member of the tamper switch body in a base plate of the PIR sensor. An elastic switch member is mounted in the tamper opening. The elastic switch member includes a pressure-receiving projection portion abutting a mounting plate, and depresses the switch actuating member through elastic deformation of the pressure-receiving projection portion by receiving a pushing force from the mounting plate in a state in which the PIR sensor is fixed to a wall surface. The elastic switch member seals the inside of the housing by closing the tamper opening, thus preventing a flood into the housing of the PIR sensor.

A composite catalyst which comprises a catalyst particle and at least one member selected from the group consisting of a porous or net-form cation-exchange resin and a porous or net-form hydrophobic polymer, wherein the resin and polymer exist on the surface of the catalyst particle.

A drain grate filter assembly having a filter sheet member, wedging anchors and mechanical fasteners, whereby the assembly is connected to a drain grate by inserting wedging anchors into the apertures of the grate, placing the filter sheet member atop the grate and inserting fasteners through the filter sheet member and into the wedging anchors.

A method of and a system for establishing presence of a mobile station in at least one dedicated service area of a mobile telecommunications system providing service to a plurality of geographically spread service areas. A mobile station is triggered to provide location information relating to the presence of the mobile station at a location receiving service from a service area comprising the or each dedicated service area. Presence of the mobile station in the or each dedicated service area is established by comparing the location information provided by the mobile station and stored location information relating to the or each dedicated service area. If present in a dedicated service area, the mobile station automatically receives dedicated services to which the mobile unit is entitled to. Receipt of dedicated services is automatically indicated to a user of the mobile station.

In the invention, when a protection switch network goes wrong, only the service between the protection switch points influenced by the failure will be switched, and the service between the protection switch points not influenced by the failure will not be switched. The invention lowers the influence caused by a failure to MP2MP service.

A PEM fuel cell stack including one or more fuel cells (1) arranged on top of one another, each of which contains a membrane electrode assembly (2) between two electrically conductive bipolar plates (3,4), the surfaces of which are equipped with flow channels (10) open on one side for the supply of reactive gases, whereby the membrane electrode assemblies each comprise a polymer electrolyte membrane (5), both sides of which are in contact with a reaction layer (6,7), whereby the surface area of the reaction layers is smaller than that of the polymer electrolyte membrane and a compressible, coarse-pore gas distribution layer (8,9) made from carbon fiber fabric is inserted between each reaction layer and the adjacent bipolar plates congruent to the reaction lawyers along with seals (11,12) in the area outside the surface covered by the gas distribution layers, whereby the gas distribution layers in the no-load condition display a thickness D1 and the seals a thickness D2. The PEM fuel cell stack is featured by the gas distribution layers in the PEM fuel cell stack being compressed to 25 to 60% of the original thickness.

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.