Abstract: The invention relates to a method for connecting a connection piece to a U-shaped ring anchor for a head module for rail vehicles, the head module consisting predominantly of fiber-reinforced plastic material and having an outer shell and the ring anchor consisting of fiber-reinforced plastic material and being arranged in the roof region of the outer shell as a stiffening means. According to the method, connecting elements are fed through the dry or matrix-material-impregnated, unconsolidated fiber reinforcement structure of the ring anchor.

Abstract: The present disclosure a temperature-resistant and salt-resistant modified nano-graphite dispersed particle gel system with a strong self-growth effect.

Abstract: The present disclosure a temperature-resistant and salt-resistant modified nano-graphite dispersed particle gel system with a strong self-growth effect.

Abstract: Provided is a method for simultaneous detection of parameters of membrane electrode assemblies of a fuel cell stack, which includes: supplying hydrogen to an anode of the fuel cell stack and inert gas to a cathode of the fuel cell stack, controlling operating conditions of the fuel cell stack at respective preset values; applying different voltage excitations or micro-current excitations to the fuel cell stack, collecting a current signal of an entire stack and a voltage signal of each fuel cell; and analyzing a hydrogen crossover current, a catalyst electrochemical surface area, a double-layer capacitance, and a short-circuit resistance of a membrane electrode assembly of each fuel cell based on an excitation-response formula of a fuel cell. The present disclosure does not limit a form of a current or voltage excitation, thereby improving accuracy of a parameter test of a membrane electrode assembly while reducing the test cost.

Abstract: The technology described herein is capable of generating and presenting graphical user interfaces for displaying shared content, configuring space objects (also simply called spaces), posting digital content items to various spaces, inviting other users to contribute digital content items to various spaces, forking digital content items posted in one space or post object to another space or post object, contextual searching, posting rich comments in association with a post including graphical and textual data, and so forth. Further, the technology may provide suggestive search based on the spaces associated with a user, generate and exchange data with other nodes on a computer network, generate notification data including notifications reflecting updates posted to spaces by various users, and coalesce related comments to reduce number of notifications that each user receives and/or through which a user may have to navigate or scroll through.

Abstract: Provided is a method for simultaneous detection of parameters of membrane electrode assemblies of a fuel cell stack, which includes: supplying hydrogen to an anode of the fuel cell stack and inert gas to a cathode of the fuel cell stack, controlling operating conditions of the fuel cell stack at respective preset values; applying different voltage excitations or micro-current excitations to the fuel cell stack, collecting a current signal of an entire stack and a voltage signal of each fuel cell; and analyzing a hydrogen crossover current, a catalyst electrochemical surface area, a double-layer capacitance, and a short-circuit resistance of a membrane electrode assembly of each fuel cell based on an excitation-response formula of a fuel cell. The present disclosure does not limit a form of a current or voltage excitation, thereby improving accuracy of a parameter test of a membrane electrode assembly while reducing the test cost.

Abstract: Provided are method and device for predicting service life and remaining life of a fuel cell. The method includes: activating the fuel cell, obtaining an initial polarization curve of the fuel cell, and selecting a first point having a first current in the initial polarization curve; determining a life end point of the fuel cell according to the initial polarization curve and a decay ratio; obtaining a current polarization curve, and determining a second point having a second current and a same voltage as the first point in the current polarization curve; and determining the service life of the fuel cell according to the first current, the second current, a current relationship between two polarization curves and a service life algorithm of the fuel cell, and obtaining the remaining life of the fuel cell according to the service life and a time of the current polarization curve.

Abstract: Provided are a method and an apparatus controlling a water flooding failure in a fuel cell dual-stack system. The method includes: acquiring a hydrogen pressure drop reference value of the stack system in each normal working condition to obtain a control value; collecting a current pressure drop at a hydrogen side, and determining whether the current pressure drop at the hydrogen side is higher than the control value corresponding to a current normal working condition; determining a faulted stack according to voltages or currents of the first stack and the second stack if the current pressure drop at the hydrogen side is higher than the control value corresponding to the current normal working condition; reducing an opening degree of a flow regulating valve of the faulted stack, and increasing an opening degree of a flow regulating valve of the other stack.

Abstract: Disclosed are a method and device for forecasting the service life and remaining life of a fuel cell. The method comprises: determining an end of life on the basis of the attenuation percentage of the current or power of a fuel cell at a constant voltage, completing the activation of the fuel cell, measuring a first polarization curve of the fuel cell; when the fuel cell runs for a preset time, measuring the second polarization curve of the fuel cell; acquiring the voltage attenuation rate or a current attenuation time constant of the fuel cell, and acquiring the service life and remaining life of the fuel cell via a forecasting formula.

Abstract: The invention discloses a smoke detection method, which comprises the steps of: adjusting a detection period of a smoke alarm to be a rapid detection period when a smoke density is detected to meet a set density threshold; calculating a ratio of an electrical signal increment caused by a first transmitted signal to an electrical signal increment caused by a second transmitted signal; and increasing a smoke alarm threshold when smoke is judged not to be caused by a fire hazard based on the ratio. In the invention, different types of smoke can be identified and different alarm modes can be selected to solve the problem of a false alarm.

Abstract: The technology described herein is capable of generating and presenting graphical user interfaces for displaying shared content, configuring space objects (also simply called spaces), posting digital content items to various spaces, inviting other users to contribute digital content items to various spaces, forking digital content items posted in one space or post object to another space or post object, contextual searching, posting rich comments in association with a post including graphical and textual data, and so forth. Further, the technology may provide suggestive search based on the spaces associated with a user, generate and exchange data with other nodes on a computer network, generate notification data including notifications reflecting updates posted to spaces by various users, and coalesce related comments to reduce number of notifications that each user receives and/or through which a user may have to navigate or scroll through.

Abstract: The invention relates to a method for connecting a connection piece to a U-shaped ring anchor for a head module for rail vehicles, the head module consisting predominantly of fiber-reinforced plastic material and having an outer shell and the ring anchor consisting of fiber-reinforced plastic material and being arranged in the roof region of the outer shell as a stiffening means. According to the method, connecting elements are fed through the dry or matrix-material-impregnated, unconsolidated fiber reinforcement structure of the ring anchor.

Abstract: The technology described herein is capable of generating and presenting graphical user interfaces for displaying shared content, configuring space objects (also simply called spaces), posting digital content items to various spaces, inviting other users to contribute digital content items to various spaces, forking digital content items posted in one space or post object to another space or post object, contextual searching, posting rich comments in association with a post including graphical and textual data, and so forth. Further, the technology may provide suggestive search based on the spaces associated with a user, generate and exchange data with other nodes on a computer network, generate notification data including notifications reflecting updates posted to spaces by various users, and coalesce related comments to reduce number of notifications that each user receives and/or through which a user may have to navigate or scroll through.

Abstract: Provided are a method and an apparatus controlling a water flooding failure in a fuel cell dual-stack system. The method includes: acquiring a hydrogen pressure drop reference value of the stack system in each normal working condition to obtain a control value; collecting a current pressure drop at a hydrogen side, and determining whether the current pressure drop at the hydrogen side is higher than the control value corresponding to a current normal working condition; determining a faulted stack according to voltages or currents of the first stack and the second stack if the current pressure drop at the hydrogen side is higher than the control value corresponding to the current normal working condition; reducing an opening degree of a flow regulating valve of the faulted stack, and increasing an opening degree of a flow regulating valve of the other stack.

Abstract: The technology described herein is capable of generating and presenting graphical user interfaces for displaying shared content, configuring space objects (also simply called spaces), posting digital content items to various spaces, inviting other users to contribute digital content items to various spaces, forking digital content items posted in one space or post object to another space or post object, contextual searching, posting rich comments in association with a post including graphical and textual data, and so forth. Further, the technology may provide suggestive search based on the spaces associated with a user, generate and exchange data with other nodes on a computer network, generate notification data including notifications reflecting updates posted to spaces by various users, and coalesce related comments to reduce number of notifications that each user receives and/or through which a user may have to navigate or scroll through.

Abstract: The technology described herein is capable of generating and presenting graphical user interfaces for displaying shared content, configuring space objects (also simply called spaces), posting digital content items to various spaces, inviting other users to contribute digital content items to various spaces, forking digital content items posted in one space or post object to another space or post object, contextual searching, posting rich comments in association with a post including graphical and textual data, and so forth. Further, the technology may provide suggestive search based on the spaces associated with a user, generate and exchange data with other nodes on a computer network, generate notification data including notifications reflecting updates posted to spaces by various users, and coalesce related comments to reduce number of notifications that each user receives and/or through which a user may have to navigate or scroll through.

Abstract: This invention relates to carbide inserts used on roller cone bits for oil and gas drilling applications as well as for other geological drilling applications, and more specifically, relates to the convex crested insert with deflected wedge surfaces. The insert comprises a cylindrical portion and a crest portion. Said crest portion is composed of a conical crest base, a top surface and two opposing wedge surfaces. Upper ends of the two wedge surfaces are merged smoothly with top surface of the insert. The specific feature of the structure is that top surface of the crest portion is convexed outwardly and forms a smooth curve surface which is higher in the middle and lowers down gradually to each end. Said two wedge surfaces are slant wedge surfaces, so that a width of the top surface and therefore a width of the insert crest are tapered from one end to the other. Advantages of this invention include: 1.

Abstract: This invention relates to carbide inserts used on roller cone bits for oil and gas drilling applications as well as for other geological drilling applications, and more specifically, relates to the convex crested insert with deflected wedge surfaces. The insert comprises a cylindrical portion and a crest portion. Said crest portion is composed of a conical crest base, a top surface and two opposing wedge surfaces. Upper ends of the two wedge surfaces are merged smoothly with top surface of the insert. The specific feature of the structure is that top surface of the crest portion is convexed outwardly and forms a smooth curve surface which is higher in the middle and lowers down gradually to each end. Said two wedge surfaces are slant wedge surfaces, so that a width of the top surface and therefore a width of the insert crest are tapered from one end to the other. Advantages of this invention include: 1.